From 85a0f07fb860e23174abaea0feb7076ae1012d63 Mon Sep 17 00:00:00 2001 From: Joel Sherrill Date: Sat, 25 Nov 2000 22:10:01 +0000 Subject: 2000-11-25 Antti P Miettinen * wrapup/Makefile.am: Added modem subdir. * configure.in, Makefile.am: Added modem subdir. * net/Makefile.am: Added if_pppvar.h, pppcompress.h. * pppd/Makefile.am: Added pppmain.c (which needs work). * pppd/chat.c, pppd/fsm.c, pppd/fsm.h, pppd/ipxcp.c, pppd/main.c, pppd/ppp_tty.c, pppd/upap.c: Changes from Thomas Doerfler and cosmetic changes by me. Actually main.c and ppp_tty.c should be scratched. The modem subdir has the real ppp_tty.c and the real pppd main is in pppmain.c. --- c/src/exec/libnetworking/net/if_pppvar.h | 111 ++ c/src/exec/libnetworking/net/pppcompress.h | 164 +++ c/src/libnetworking/modem/.cvsignore | 2 + c/src/libnetworking/modem/Makefile.am | 39 + c/src/libnetworking/modem/ppp.c | 1507 ++++++++++++++++++++++++++++ c/src/libnetworking/modem/ppp.h | 7 + c/src/libnetworking/modem/ppp_tty.c | 1106 ++++++++++++++++++++ c/src/libnetworking/modem/pppcompress.c | 593 +++++++++++ c/src/libnetworking/net/if_pppvar.h | 111 ++ c/src/libnetworking/net/pppcompress.h | 164 +++ c/src/libnetworking/pppd/pppmain.c | 1304 ++++++++++++++++++++++++ cpukit/libnetworking/net/if_pppvar.h | 111 ++ cpukit/libnetworking/net/pppcompress.h | 164 +++ 13 files changed, 5383 insertions(+) create mode 100644 c/src/exec/libnetworking/net/if_pppvar.h create mode 100644 c/src/exec/libnetworking/net/pppcompress.h create mode 100644 c/src/libnetworking/modem/.cvsignore create mode 100644 c/src/libnetworking/modem/Makefile.am create mode 100644 c/src/libnetworking/modem/ppp.c create mode 100644 c/src/libnetworking/modem/ppp.h create mode 100644 c/src/libnetworking/modem/ppp_tty.c create mode 100644 c/src/libnetworking/modem/pppcompress.c create mode 100644 c/src/libnetworking/net/if_pppvar.h create mode 100644 c/src/libnetworking/net/pppcompress.h create mode 100644 c/src/libnetworking/pppd/pppmain.c create mode 100644 cpukit/libnetworking/net/if_pppvar.h create mode 100644 cpukit/libnetworking/net/pppcompress.h diff --git a/c/src/exec/libnetworking/net/if_pppvar.h b/c/src/exec/libnetworking/net/if_pppvar.h new file mode 100644 index 0000000000..6eb45a6afb --- /dev/null +++ b/c/src/exec/libnetworking/net/if_pppvar.h @@ -0,0 +1,111 @@ +/* $Id$ */ +/* + * if_pppvar.h - private structures and declarations for PPP. + * + * Copyright (c) 1994 The Australian National University. + * All rights reserved. + * + * Permission to use, copy, modify, and distribute this software and its + * documentation is hereby granted, provided that the above copyright + * notice appears in all copies. This software is provided without any + * warranty, express or implied. The Australian National University + * makes no representations about the suitability of this software for + * any purpose. + * + * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY + * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF + * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO + * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, + * OR MODIFICATIONS. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +/* + * Supported network protocols. These values are used for + * indexing sc_npmode. + */ +#define NP_IP 0 /* Internet Protocol */ +#define NUM_NP 1 /* Number of NPs. */ + +/* + * Structure describing each ppp unit. + */ +struct ppp_softc { + struct ifnet sc_if; /* network-visible interface */ + u_int sc_flags; /* control/status bits; see if_ppp.h */ + void *sc_devp; /* pointer to device-dep structure */ + void (*sc_start) __P((struct ppp_softc *)); /* start output proc */ + void (*sc_ctlp) __P((struct ppp_softc *)); /* rcvd control pkt */ + void (*sc_relinq) __P((struct ppp_softc *)); /* relinquish ifunit */ + short sc_mru; /* max receive unit */ + pid_t sc_xfer; /* used in transferring unit */ + struct ifqueue sc_rawq; /* received packets */ + struct ifqueue sc_inq; /* queue of input packets for daemon */ + struct ifqueue sc_fastq; /* interactive output packet q */ + struct mbuf *sc_togo; /* output packet ready to go */ + struct mbuf *sc_npqueue; /* output packets not to be sent yet */ + struct mbuf **sc_npqtail; /* ptr to last next ptr in npqueue */ + struct pppstat sc_stats; /* count of bytes/pkts sent/rcvd */ + caddr_t sc_bpf; /* hook for BPF */ + enum NPmode sc_npmode[NUM_NP]; /* what to do with each NP */ + struct compressor *sc_xcomp; /* transmit compressor */ + void *sc_xc_state; /* transmit compressor state */ + struct compressor *sc_rcomp; /* receive decompressor */ + void *sc_rc_state; /* receive decompressor state */ + time_t sc_last_sent; /* time (secs) last NP pkt sent */ + time_t sc_last_recv; /* time (secs) last NP pkt rcvd */ +#ifdef PPP_FILTER + struct bpf_program sc_pass_filt; /* filter for packets to pass */ + struct bpf_program sc_active_filt; /* filter for "non-idle" packets */ +#endif /* PPP_FILTER */ +#ifdef VJC + struct vjcompress *sc_comp; /* vjc control buffer */ +#endif + + /* Device-dependent part for async lines. */ + ext_accm sc_asyncmap; /* async control character map */ + u_long sc_rasyncmap; /* receive async control char map */ + struct mbuf *sc_outm; /* mbuf chain currently being output */ + struct mbuf *sc_m; /* pointer to input mbuf chain */ + struct mbuf *sc_mc; /* pointer to current input mbuf */ + char *sc_mp; /* ptr to next char in input mbuf */ + short sc_ilen; /* length of input packet so far */ + u_short sc_fcs; /* FCS so far (input) */ + u_short sc_outfcs; /* FCS so far for output packet */ + u_char sc_rawin[16]; /* chars as received */ + int sc_rawin_count; /* # in sc_rawin */ + rtems_id sem_id; /* ID of comm semaphore */ +}; + +struct ppp_softc ppp_softc[NPPP]; + +struct ppp_softc *pppalloc __P((pid_t pid)); +void pppdealloc __P((struct ppp_softc *sc)); +int pppoutput __P((struct ifnet *, struct mbuf *, + struct sockaddr *, struct rtentry *)); +int pppioctl __P((struct ppp_softc *sc, int cmd, caddr_t data, + int flag, struct proc *p)); +void ppp_restart __P((struct ppp_softc *sc)); +void ppppktin __P((struct ppp_softc *sc, struct mbuf *m, int lost)); +struct mbuf *ppp_dequeue __P((struct ppp_softc *sc)); diff --git a/c/src/exec/libnetworking/net/pppcompress.h b/c/src/exec/libnetworking/net/pppcompress.h new file mode 100644 index 0000000000..3f7687e6bb --- /dev/null +++ b/c/src/exec/libnetworking/net/pppcompress.h @@ -0,0 +1,164 @@ +/* + * Definitions for tcp compression routines. + * + * Copyright (c) 1989 Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * Van Jacobson (van@helios.ee.lbl.gov), Dec 31, 1989: + * - Initial distribution. + * + * From: slcompress.h 7.4 90/06/28 + * $Id$ + */ + +#ifndef _NET_PPPCOMPRESS_H_ +#define _NET_PPPCOMPRESS_H_ + +#define MAX_STATES 16 /* must be > 2 and < 256 */ +#define MAX_HDR MLEN /* XXX 4bsd-ism: should really be 128 */ + +/* + * Compressed packet format: + * + * The first octet contains the packet type (top 3 bits), TCP + * 'push' bit, and flags that indicate which of the 4 TCP sequence + * numbers have changed (bottom 5 bits). The next octet is a + * conversation number that associates a saved IP/TCP header with + * the compressed packet. The next two octets are the TCP checksum + * from the original datagram. The next 0 to 15 octets are + * sequence number changes, one change per bit set in the header + * (there may be no changes and there are two special cases where + * the receiver implicitly knows what changed -- see below). + * + * There are 5 numbers which can change (they are always inserted + * in the following order): TCP urgent pointer, window, + * acknowlegement, sequence number and IP ID. (The urgent pointer + * is different from the others in that its value is sent, not the + * change in value.) Since typical use of SLIP links is biased + * toward small packets (see comments on MTU/MSS below), changes + * use a variable length coding with one octet for numbers in the + * range 1 - 255 and 3 octets (0, MSB, LSB) for numbers in the + * range 256 - 65535 or 0. (If the change in sequence number or + * ack is more than 65535, an uncompressed packet is sent.) + */ + +/* + * Packet types (must not conflict with IP protocol version) + * + * The top nibble of the first octet is the packet type. There are + * three possible types: IP (not proto TCP or tcp with one of the + * control flags set); uncompressed TCP (a normal IP/TCP packet but + * with the 8-bit protocol field replaced by an 8-bit connection id -- + * this type of packet syncs the sender & receiver); and compressed + * TCP (described above). + * + * LSB of 4-bit field is TCP "PUSH" bit (a worthless anachronism) and + * is logically part of the 4-bit "changes" field that follows. Top + * three bits are actual packet type. For backward compatibility + * and in the interest of conserving bits, numbers are chosen so the + * IP protocol version number (4) which normally appears in this nibble + * means "IP packet". + */ + +/* packet types */ +#define TYPE_IP 0x40 +#define TYPE_UNCOMPRESSED_TCP 0x70 +#define TYPE_COMPRESSED_TCP 0x80 +#define TYPE_ERROR 0x00 + +/* Bits in first octet of compressed packet */ +#define NEW_C 0x40 /* flag bits for what changed in a packet */ +#define NEW_I 0x20 +#define NEW_S 0x08 +#define NEW_A 0x04 +#define NEW_W 0x02 +#define NEW_U 0x01 + +/* reserved, special-case values of above */ +#define SPECIAL_I (NEW_S|NEW_W|NEW_U) /* echoed interactive traffic */ +#define SPECIAL_D (NEW_S|NEW_A|NEW_W|NEW_U) /* unidirectional data */ +#define SPECIALS_MASK (NEW_S|NEW_A|NEW_W|NEW_U) + +#define TCP_PUSH_BIT 0x10 + + +/* + * "state" data for each active tcp conversation on the wire. This is + * basically a copy of the entire IP/TCP header from the last packet + * we saw from the conversation together with a small identifier + * the transmit & receive ends of the line use to locate saved header. + */ +struct cstate { + struct cstate *cs_next; /* next most recently used cstate (xmit only) */ + u_short cs_hlen; /* size of hdr (receive only) */ + u_char cs_id; /* connection # associated with this state */ + u_char cs_filler; + union { + char csu_hdr[MAX_HDR]; + struct ip csu_ip; /* ip/tcp hdr from most recent packet */ + } slcs_u; +}; +#define cs_ip slcs_u.csu_ip +#define cs_hdr slcs_u.csu_hdr + +/* + * all the state data for one serial line (we need one of these + * per line). + */ +struct vjcompress { + struct cstate *last_cs; /* most recently used tstate */ + u_char last_recv; /* last rcvd conn. id */ + u_char last_xmit; /* last sent conn. id */ + u_short flags; +#ifndef SL_NO_STATS + int sls_packets; /* outbound packets */ + int sls_compressed; /* outbound compressed packets */ + int sls_searches; /* searches for connection state */ + int sls_misses; /* times couldn't find conn. state */ + int sls_uncompressedin; /* inbound uncompressed packets */ + int sls_compressedin; /* inbound compressed packets */ + int sls_errorin; /* inbound unknown type packets */ + int sls_tossed; /* inbound packets tossed because of error */ +#endif + struct cstate tstate[MAX_STATES]; /* xmit connection states */ + struct cstate rstate[MAX_STATES]; /* receive connection states */ +}; +/* flag values */ +#define SLF_TOSS 1 /* tossing rcvd frames because of input err */ + +void vj_compress_init __P((struct vjcompress *, int)); +u_int vj_compress_tcp __P((struct mbuf *, + struct ip *, struct vjcompress *, int)); +int vj_uncompress_tcp __P((u_char **, int, u_int, struct vjcompress *)); +int vj_uncompress_tcp_core __P((u_char *, int, int, u_int, + struct vjcompress *, u_char **, u_int *)); + +#endif /* _NET_PPPCOMPRESS_H_ */ diff --git a/c/src/libnetworking/modem/.cvsignore b/c/src/libnetworking/modem/.cvsignore new file mode 100644 index 0000000000..282522db03 --- /dev/null +++ b/c/src/libnetworking/modem/.cvsignore @@ -0,0 +1,2 @@ +Makefile +Makefile.in diff --git a/c/src/libnetworking/modem/Makefile.am b/c/src/libnetworking/modem/Makefile.am new file mode 100644 index 0000000000..86560501b4 --- /dev/null +++ b/c/src/libnetworking/modem/Makefile.am @@ -0,0 +1,39 @@ +## +## $Id $ +## + +AUTOMAKE_OPTIONS = foreign 1.4 + +LIBNAME = lib.a +LIB = $(ARCH)/$(LIBNAME) + +C_FILES = ppp_tty.c ppp.c pppcompress.c +C_O_FILES = $(C_FILES:%.c=$(ARCH)/%.o) + +OBJS = $(C_O_FILES) + +include $(RTEMS_ROOT)/make/custom/@RTEMS_BSP@.cfg +include $(top_srcdir)/../../../automake/compile.am +include $(top_srcdir)/../../../automake/lib.am + +# +# Add local stuff here using += +# + +# DEFINES += -D_COMPILING_BSD_KERNEL_ -DKERNEL -DINET -DNFS -DDIAGNOSTIC \ +# -DBOOTP_COMPAT + +AM_CPPFLAGS += -D__INSIDE_RTEMS_BSD_TCPIP_STACK__ \ +-D_COMPILING_BSD_KERNEL_ -DKERNEL -DINET -DNFS -DDIAGNOSTIC \ +-DBOOTP_COMPAT + +$(LIB): $(OBJS) + $(make-library) + +all-local: $(ARCH) $(OBJS) $(LIB) + +.PRECIOUS: $(LIB) + +EXTRA_DIST = ppp_tty.c ppp.c ppp.h pppcompress.c + +include $(top_srcdir)/../../../automake/local.am diff --git a/c/src/libnetworking/modem/ppp.c b/c/src/libnetworking/modem/ppp.c new file mode 100644 index 0000000000..9b31b678fb --- /dev/null +++ b/c/src/libnetworking/modem/ppp.c @@ -0,0 +1,1507 @@ +/* + * if_ppp.c - Point-to-Point Protocol (PPP) Asynchronous driver. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * Drew D. Perkins + * Carnegie Mellon University + * 4910 Forbes Ave. + * Pittsburgh, PA 15213 + * (412) 268-8576 + * ddp@andrew.cmu.edu + * + * Based on: + * @(#)if_sl.c 7.6.1.2 (Berkeley) 2/15/89 + * + * Copyright (c) 1987 Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by the University of California, Berkeley. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * Serial Line interface + * + * Rick Adams + * Center for Seismic Studies + * 1300 N 17th Street, Suite 1450 + * Arlington, Virginia 22209 + * (703)276-7900 + * rick@seismo.ARPA + * seismo!rick + * + * Pounded on heavily by Chris Torek (chris@mimsy.umd.edu, umcp-cs!chris). + * Converted to 4.3BSD Beta by Chris Torek. + * Other changes made at Berkeley, based in part on code by Kirk Smith. + * + * Converted to 4.3BSD+ 386BSD by Brad Parker (brad@cayman.com) + * Added VJ tcp header compression; more unified ioctls + * + * Extensively modified by Paul Mackerras (paulus@cs.anu.edu.au). + * Cleaned up a lot of the mbuf-related code to fix bugs that + * caused system crashes and packet corruption. Changed pppstart + * so that it doesn't just give up with a collision if the whole + * packet doesn't fit in the output ring buffer. + * + * Added priority queueing for interactive IP packets, following + * the model of if_sl.c, plus hooks for bpf. + * Paul Mackerras (paulus@cs.anu.edu.au). + */ + +/* $Id$ */ +/* from if_sl.c,v 1.11 84/10/04 12:54:47 rick Exp */ +/* from NetBSD: if_ppp.c,v 1.15.2.2 1994/07/28 05:17:58 cgd Exp */ + +#include "ppp.h" +#if NPPP > 0 +/* na razie wylaczmy kompresje*/ + +#include /* to get right defines */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#ifdef PPP_FILTER +#include +#endif + +#ifdef INET +#include +#include +#include +#include +#endif + +#include +#if NBPFILTER > 0 +#include +#endif + +#ifdef VJC +#include +#endif + +#include +#include +#include +#include + +#define splsoftnet splnet + +#ifndef NETISR_PPP +/* This definition should be moved to net/netisr.h */ +#define NETISR_PPP 26 /* PPP software interrupt */ +#endif + +#ifdef PPP_COMPRESS +#define PACKETPTR struct mbuf * +#include +#endif +extern struct ifqueue ipintrq; +static int pppsioctl __P((struct ifnet *, int, caddr_t)); +static void ppp_requeue __P((struct ppp_softc *)); +static void ppp_ccp __P((struct ppp_softc *, struct mbuf *m, int rcvd)); +static void ppp_ccp_closed __P((struct ppp_softc *)); +static void ppp_inproc __P((struct ppp_softc *, struct mbuf *)); +static void pppdumpm __P((struct mbuf *m0)); + +/* + * Some useful mbuf macros not in mbuf.h. + */ +#define M_IS_CLUSTER(m) ((m)->m_flags & M_EXT) + +#define M_DATASTART(m) \ + (M_IS_CLUSTER(m) ? (m)->m_ext.ext_buf : \ + (m)->m_flags & M_PKTHDR ? (m)->m_pktdat : (m)->m_dat) + +#define M_DATASIZE(m) \ + (M_IS_CLUSTER(m) ? (m)->m_ext.ext_size : \ + (m)->m_flags & M_PKTHDR ? MHLEN: MLEN) + +/* + * We steal two bits in the mbuf m_flags, to mark high-priority packets + * for output, and received packets following lost/corrupted packets. + */ +#define M_HIGHPRI 0x2000 /* output packet for sc_fastq */ +#define M_ERRMARK 0x4000 /* steal a bit in mbuf m_flags */ + + +#ifdef PPP_COMPRESS +/* + * List of compressors we know about. + * We leave some space so maybe we can modload compressors. + */ + +extern struct compressor ppp_bsd_compress; +extern struct compressor ppp_deflate, ppp_deflate_draft; + + +struct compressor *ppp_compressors[8] = { +#if DO_BSD_COMPRESS + &ppp_bsd_compress, +#endif +#if DO_DEFLATE + &ppp_deflate, + &ppp_deflate_draft, +#endif + NULL +}; +#endif /* PPP_COMPRESS */ +static struct timeval ppp_time; + +TEXT_SET(pseudo_set, pppattach); + +/* + * Called from boot code to establish ppp interfaces. + */ +int rtems_ppp_driver_attach (struct rtems_bsdnet_ifconfig *config, + int attaching) +{ + register struct ppp_softc *sc; + register int i = 0; + extern void (*netisrs[])__P((void)); + + for (sc = ppp_softc; i < NPPP; sc++) { + sc->sc_if.if_name = "ppp"; + sc->sc_if.if_unit = i++; + sc->sc_if.if_mtu = PPP_MTU; + sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST; + sc->sc_if.if_type = IFT_PPP; + sc->sc_if.if_hdrlen = PPP_HDRLEN; + sc->sc_if.if_ioctl = pppsioctl; + sc->sc_if.if_output = pppoutput; + sc->sc_if.if_snd.ifq_maxlen = IFQ_MAXLEN; + sc->sc_inq.ifq_maxlen = IFQ_MAXLEN; + sc->sc_fastq.ifq_maxlen = IFQ_MAXLEN; + sc->sc_rawq.ifq_maxlen = IFQ_MAXLEN; + if_attach(&sc->sc_if); +#if NBPFILTER > 0 + bpfattach(&sc->sc_bpf, &sc->sc_if, DLT_PPP, PPP_HDRLEN); +#endif + } +/* wpisane na twardo do rtems_glue.c + netisrs[NETISR_PPP] = pppintr; */ + return 1; +} + +/* + * Allocate a ppp interface unit and initialize it. + */ +struct ppp_softc * +pppalloc(pid) + pid_t pid; +{ + int nppp, i; + struct ppp_softc *sc; + for (nppp = 0, sc = ppp_softc; nppp < NPPP; nppp++, sc++) + if (sc->sc_xfer == pid) { + sc->sc_xfer = 0; + return sc; + } + for (nppp = 0, sc = ppp_softc; nppp < NPPP; nppp++, sc++) + if (sc->sc_devp == NULL) + break; + if (nppp >= NPPP) + return NULL; + + sc->sc_flags = 0; + sc->sc_mru = PPP_MRU; + sc->sc_relinq = NULL; + bzero((char *)&sc->sc_stats, sizeof(sc->sc_stats)); +#ifdef VJC + sc->sc_comp=malloc(sizeof(struct vjcompress),M_DEVBUF, M_NOWAIT); + if (sc->sc_comp) + vj_compress_init(sc->sc_comp, -1); +#endif +#ifdef PPP_COMPRESS + sc->sc_xc_state = NULL; + sc->sc_rc_state = NULL; +#endif /* PPP_COMPRESS */ + for (i = 0; i < NUM_NP; ++i) + sc->sc_npmode[i] = NPMODE_ERROR; + sc->sc_npqueue = NULL; + sc->sc_npqtail = &sc->sc_npqueue; + microtime(&ppp_time); + sc->sc_last_sent = sc->sc_last_recv = ppp_time.tv_sec; + + return sc; +} + +/* + * Deallocate a ppp unit. Must be called at splsoftnet or higher. + */ +void +pppdealloc(sc) + struct ppp_softc *sc; +{ + struct mbuf *m; + + if_down(&sc->sc_if); + sc->sc_if.if_flags &= ~(IFF_UP|IFF_RUNNING); + sc->sc_devp = NULL; + sc->sc_xfer = 0; + for (;;) { + IF_DEQUEUE(&sc->sc_rawq, m); + if (m == NULL) + break; + m_freem(m); + } + for (;;) { + IF_DEQUEUE(&sc->sc_inq, m); + if (m == NULL) + break; + m_freem(m); + } + for (;;) { + IF_DEQUEUE(&sc->sc_fastq, m); + if (m == NULL) + break; + m_freem(m); + } + while ((m = sc->sc_npqueue) != NULL) { + sc->sc_npqueue = m->m_nextpkt; + m_freem(m); + } + if (sc->sc_togo != NULL) { + m_freem(sc->sc_togo); + sc->sc_togo = NULL; + } +#ifdef PPP_COMPRESS + ppp_ccp_closed(sc); + sc->sc_xc_state = NULL; + sc->sc_rc_state = NULL; +#endif /* PPP_COMPRESS */ +#ifdef PPP_FILTER + if (sc->sc_pass_filt.bf_insns != 0) { + free(sc->sc_pass_filt.bf_insns, M_DEVBUF); + sc->sc_pass_filt.bf_insns = 0; + sc->sc_pass_filt.bf_len = 0; + } + if (sc->sc_active_filt.bf_insns != 0) { + free(sc->sc_active_filt.bf_insns, M_DEVBUF); + sc->sc_active_filt.bf_insns = 0; + sc->sc_active_filt.bf_len = 0; + } +#endif /* PPP_FILTER */ +#ifdef VJC + if (sc->sc_comp != 0) { + free(sc->sc_comp, M_DEVBUF); + sc->sc_comp = 0; + } +#endif +} + +/* + * Ioctl routine for generic ppp devices. + */ +int +pppioctl(sc, cmd, data, flag, p) + struct ppp_softc *sc; + int cmd; + caddr_t data; + int flag; + struct proc *p; +{ + int s, error, flags, mru, nb, npx; + struct ppp_option_data *odp; + struct compressor **cp; + struct npioctl *npi; + time_t t; +#ifdef PPP_FILTER + struct bpf_program *bp, *nbp; + struct bpf_insn *newcode, *oldcode; + int newcodelen; +#endif /* PPP_FILTER */ +#ifdef PPP_COMPRESS + u_char ccp_option[CCP_MAX_OPTION_LENGTH]; +#endif + + switch (cmd) { + case FIONREAD: + *(int *)data = sc->sc_inq.ifq_len; + break; + + case PPPIOCGUNIT: + *(int *)data = sc->sc_if.if_unit; + break; + + case PPPIOCGFLAGS: + *(u_int *)data = sc->sc_flags; + break; + + case PPPIOCSFLAGS: + flags = *(int *)data & SC_MASK; + s = splsoftnet(); +#ifdef PPP_COMPRESS + if (sc->sc_flags & SC_CCP_OPEN && !(flags & SC_CCP_OPEN)) + ppp_ccp_closed(sc); +#endif + splimp(); + sc->sc_flags = (sc->sc_flags & ~SC_MASK) | flags; + splx(s); + break; + + case PPPIOCSMRU: + mru = *(int *)data; + if (mru >= PPP_MRU && mru <= PPP_MAXMRU) + sc->sc_mru = mru; + break; + + case PPPIOCGMRU: + *(int *)data = sc->sc_mru; + break; + +#ifdef VJC + case PPPIOCSMAXCID: + if (sc->sc_comp) { + s = splsoftnet(); + vj_compress_init(sc->sc_comp, *(int *)data); + splx(s); + } + break; +#endif + + case PPPIOCXFERUNIT: + sc->sc_xfer = 0; /* Always root p->p_pid;*/ + break; + +#ifdef PPP_COMPRESS + case PPPIOCSCOMPRESS: + odp = (struct ppp_option_data *) data; + nb = odp->length; + if (nb > sizeof(ccp_option)) + nb = sizeof(ccp_option); + if ((error = copyin(odp->ptr, ccp_option, nb)) != 0) + return (error); + if (ccp_option[1] < 2) /* preliminary check on the length byte */ + return (EINVAL); + for (cp = ppp_compressors; *cp != NULL; ++cp) + if ((*cp)->compress_proto == ccp_option[0]) { + /* + * Found a handler for the protocol - try to allocate + * a compressor or decompressor. + */ + error = 0; + if (odp->transmit) { + s = splsoftnet(); + if (sc->sc_xc_state != NULL) + (*sc->sc_xcomp->comp_free)(sc->sc_xc_state); + sc->sc_xcomp = *cp; + sc->sc_xc_state = (*cp)->comp_alloc(ccp_option, nb); + if (sc->sc_xc_state == NULL) { + if (sc->sc_flags & SC_DEBUG) + printf("ppp%d: comp_alloc failed\n", + sc->sc_if.if_unit); + error = ENOBUFS; + } + splimp(); + sc->sc_flags &= ~SC_COMP_RUN; + splx(s); + } else { + s = splsoftnet(); + if (sc->sc_rc_state != NULL) + (*sc->sc_rcomp->decomp_free)(sc->sc_rc_state); + sc->sc_rcomp = *cp; + sc->sc_rc_state = (*cp)->decomp_alloc(ccp_option, nb); + if (sc->sc_rc_state == NULL) { + if (sc->sc_flags & SC_DEBUG) + printf("ppp%d: decomp_alloc failed\n", + sc->sc_if.if_unit); + error = ENOBUFS; + } + splimp(); + sc->sc_flags &= ~SC_DECOMP_RUN; + splx(s); + } + return (error); + } + if (sc->sc_flags & SC_DEBUG) + printf("ppp%d: no compressor for [%x %x %x], %x\n", + sc->sc_if.if_unit, ccp_option[0], ccp_option[1], + ccp_option[2], nb); + return (EINVAL); /* no handler found */ +#endif /* PPP_COMPRESS */ + + case PPPIOCGNPMODE: + case PPPIOCSNPMODE: + npi = (struct npioctl *) data; + switch (npi->protocol) { + case PPP_IP: + npx = NP_IP; + break; + default: + return EINVAL; + } + if (cmd == PPPIOCGNPMODE) { + npi->mode = sc->sc_npmode[npx]; + } else { + if (npi->mode != sc->sc_npmode[npx]) { + s = splsoftnet(); + sc->sc_npmode[npx] = npi->mode; + if (npi->mode != NPMODE_QUEUE) { + ppp_requeue(sc); + (*sc->sc_start)(sc); + } + splx(s); + } + } + break; + + case PPPIOCGIDLE: + s = splsoftnet(); + microtime(&ppp_time); + t = ppp_time.tv_sec; + ((struct ppp_idle *)data)->xmit_idle = t - sc->sc_last_sent; + ((struct ppp_idle *)data)->recv_idle = t - sc->sc_last_recv; + splx(s); + break; + +#ifdef PPP_FILTER + case PPPIOCSPASS: + case PPPIOCSACTIVE: + nbp = (struct bpf_program *) data; + if ((unsigned) nbp->bf_len > BPF_MAXINSNS) + return EINVAL; + newcodelen = nbp->bf_len * sizeof(struct bpf_insn); + if (newcodelen != 0) { + newcode=(struct bpf_insn *) malloc (newcodelen, M_DEVBUF, M_WAITOK); + if (newcode == 0) { + return EINVAL; /* or sumpin */ + } + if ((error = copyin((caddr_t)nbp->bf_insns, (caddr_t)newcode, + newcodelen)) != 0) { + free(newcode, M_DEVBUF); + return error; + } + if (!bpf_validate(newcode, nbp->bf_len)) { + free(newcode, M_DEVBUF); + return EINVAL; + } + } else + newcode = 0; + bp = (cmd == PPPIOCSPASS)? &sc->sc_pass_filt: &sc->sc_active_filt; + oldcode = bp->bf_insns; + s = splimp(); + bp->bf_len = nbp->bf_len; + bp->bf_insns = newcode; + splx(s); + if (oldcode != 0) + free(oldcode, M_DEVBUF); + break; +#endif + + default: + return (-1); + } + return (0); +} + +/* + * Process an ioctl request to the ppp network interface. + */ +static int +pppsioctl(ifp, cmd, data) + register struct ifnet *ifp; + int cmd; + caddr_t data; +{ +/* struct proc *p = curproc; *//* XXX */ + register struct ppp_softc *sc = &ppp_softc[ifp->if_unit]; + register struct ifaddr *ifa = (struct ifaddr *)data; + register struct ifreq *ifr = (struct ifreq *)data; + struct ppp_stats *psp; +#ifdef PPP_COMPRESS + struct ppp_comp_stats *pcp; +#endif + int s = splimp(), error = 0; + + switch (cmd) { + case SIOCSIFFLAGS: + if ((ifp->if_flags & IFF_RUNNING) == 0) + ifp->if_flags &= ~IFF_UP; + break; + + case SIOCSIFADDR: + if (ifa->ifa_addr->sa_family != AF_INET) + error = EAFNOSUPPORT; + break; + + case SIOCSIFDSTADDR: + if (ifa->ifa_addr->sa_family != AF_INET) + error = EAFNOSUPPORT; + break; + + case SIOCSIFMTU: + sc->sc_if.if_mtu = ifr->ifr_mtu; + break; + + case SIOCGIFMTU: + ifr->ifr_mtu = sc->sc_if.if_mtu; + break; + + case SIOCADDMULTI: + case SIOCDELMULTI: + if (ifr == 0) { + error = EAFNOSUPPORT; + break; + } + switch(ifr->ifr_addr.sa_family) { +#ifdef INET + case AF_INET: + break; +#endif + default: + error = EAFNOSUPPORT; + break; + } + break; + case SIO_RTEMS_SHOW_STATS: + printf (" MRU:%-8lu", sc->sc_mru); + printf (" Bytes received:%-8lu", sc->sc_stats.ppp_ibytes); + printf (" Packets received:%-8lu", sc->sc_stats.ppp_ipackets); + printf (" Receive errors:%-8lu\n", sc->sc_stats.ppp_ierrors); + printf (" Bytes sent:%-8lu", sc->sc_stats.ppp_obytes); + printf (" Packets sent:%-8lu", sc->sc_stats.ppp_opackets); + printf (" Transmit errors:%-8lu\n", sc->sc_stats.ppp_oerrors); + + break; + + + case SIOCGPPPSTATS: + psp = &((struct ifpppstatsreq *) data)->stats; + bzero(psp, sizeof(*psp)); + psp->p = sc->sc_stats; +#if defined(VJC) && !defined(SL_NO_STATS) + if (sc->sc_comp) { + psp->vj.vjs_packets = sc->sc_comp->sls_packets; + psp->vj.vjs_compressed = sc->sc_comp->sls_compressed; + psp->vj.vjs_searches = sc->sc_comp->sls_searches; + psp->vj.vjs_misses = sc->sc_comp->sls_misses; + psp->vj.vjs_uncompressedin = sc->sc_comp->sls_uncompressedin; + psp->vj.vjs_compressedin = sc->sc_comp->sls_compressedin; + psp->vj.vjs_errorin = sc->sc_comp->sls_errorin; + psp->vj.vjs_tossed = sc->sc_comp->sls_tossed; + } +#endif /* VJC */ + break; + +#ifdef PPP_COMPRESS + case SIOCGPPPCSTATS: + pcp = &((struct ifpppcstatsreq *) data)->stats; + bzero(pcp, sizeof(*pcp)); + if (sc->sc_xc_state != NULL) + (*sc->sc_xcomp->comp_stat)(sc->sc_xc_state, &pcp->c); + if (sc->sc_rc_state != NULL) + (*sc->sc_rcomp->decomp_stat)(sc->sc_rc_state, &pcp->d); + break; +#endif /* PPP_COMPRESS */ + + default: + error = EINVAL; + } + splx(s); + return (error); +} + +/* + * Queue a packet. Start transmission if not active. + * Packet is placed in Information field of PPP frame. + */ +int +pppoutput(ifp, m0, dst, rtp) + struct ifnet *ifp; + struct mbuf *m0; + struct sockaddr *dst; + struct rtentry *rtp; +{ + register struct ppp_softc *sc = &ppp_softc[ifp->if_unit]; + int protocol, address, control; + u_char *cp; + int s, error; + struct ip *ip; + struct ifqueue *ifq; + enum NPmode mode; + int len; + struct mbuf *m; + if (sc->sc_devp == NULL || (ifp->if_flags & IFF_RUNNING) == 0 + || ((ifp->if_flags & IFF_UP) == 0 && dst->sa_family != AF_UNSPEC)) { + error = ENETDOWN; /* sort of */ + goto bad; + } + + /* + * Compute PPP header. + */ + m0->m_flags &= ~M_HIGHPRI; + switch (dst->sa_family) { +#ifdef INET + case AF_INET: + address = PPP_ALLSTATIONS; + control = PPP_UI; + protocol = PPP_IP; + mode = sc->sc_npmode[NP_IP]; + + /* + * If this packet has the "low delay" bit set in the IP header, + * put it on the fastq instead. + */ + ip = mtod(m0, struct ip *); + if (ip->ip_tos & IPTOS_LOWDELAY) + m0->m_flags |= M_HIGHPRI; + break; +#endif + case AF_UNSPEC: + address = PPP_ADDRESS(dst->sa_data); + control = PPP_CONTROL(dst->sa_data); + protocol = PPP_PROTOCOL(dst->sa_data); + mode = NPMODE_PASS; + break; + default: + printf("ppp%d: af%d not supported\n", ifp->if_unit, dst->sa_family); + error = EAFNOSUPPORT; + goto bad; + } + + /* + * Drop this packet, or return an error, if necessary. + */ + if (mode == NPMODE_ERROR) { + error = ENETDOWN; + goto bad; + } + if (mode == NPMODE_DROP) { + error = 0; + goto bad; + } + + /* + * Add PPP header. If no space in first mbuf, allocate another. + * (This assumes M_LEADINGSPACE is always 0 for a cluster mbuf.) + */ + if (M_LEADINGSPACE(m0) < PPP_HDRLEN) { + m0 = m_prepend(m0, PPP_HDRLEN, M_DONTWAIT); + if (m0 == 0) { + error = ENOBUFS; + goto bad; + } + m0->m_len = 0; + } else + m0->m_data -= PPP_HDRLEN; + + cp = mtod(m0, u_char *); + *cp++ = address; + *cp++ = control; + *cp++ = protocol >> 8; + *cp++ = protocol & 0xff; + m0->m_len += PPP_HDRLEN; + + len = 0; + for (m = m0; m != 0; m = m->m_next) + len += m->m_len; + + if (sc->sc_flags & SC_LOG_OUTPKT) { + printf("ppp%d output: ", ifp->if_unit); + pppdumpm(m0); + } + + if ((protocol & 0x8000) == 0) { +#ifdef PPP_FILTER + /* + * Apply the pass and active filters to the packet, + * but only if it is a data packet. + */ + *mtod(m0, u_char *) = 1; /* indicates outbound */ + if (sc->sc_pass_filt.bf_insns != 0 + && bpf_filter(sc->sc_pass_filt.bf_insns, (u_char *) m0, + len, 0) == 0) { + error = 0; /* drop this packet */ + goto bad; + } + + /* + * Update the time we sent the most recent packet. + */ + if (sc->sc_active_filt.bf_insns == 0 + || bpf_filter(sc->sc_active_filt.bf_insns, (u_char *) m0, len, 0)) + { + microtime(&ppp_time); + sc->sc_last_sent = ppp_time.tv_sec; + } + + *mtod(m0, u_char *) = address; +#else + /* + * Update the time we sent the most recent data packet. + */ + microtime(&ppp_time); + sc->sc_last_sent = ppp_time.tv_sec; +#endif /* PPP_FILTER */ + } + +#if NBPFILTER > 0 + /* + * See if bpf wants to look at the packet. + */ + if (sc->sc_bpf) + bpf_mtap(sc->sc_bpf, m0); +#endif + + /* + * Put the packet on the appropriate queue. + */ + if (mode == NPMODE_QUEUE) { + /* XXX we should limit the number of packets on this queue */ + *sc->sc_npqtail = m0; + m0->m_nextpkt = NULL; + sc->sc_npqtail = &m0->m_nextpkt; + } else { + ifq = (m0->m_flags & M_HIGHPRI)? &sc->sc_fastq: &ifp->if_snd; + if (IF_QFULL(ifq) && dst->sa_family != AF_UNSPEC) { + IF_DROP(ifq); + splx(s); + sc->sc_if.if_oerrors++; + sc->sc_stats.ppp_oerrors++; + error = ENOBUFS; + goto bad; + } + IF_ENQUEUE(ifq, m0); + (*sc->sc_start)(sc); + } + microtime(&ppp_time); + ifp->if_lastchange = ppp_time; + ifp->if_opackets++; + ifp->if_obytes += len; + + return (0); + +bad: + m_freem(m0); + return (error); +} + +/* + * After a change in the NPmode for some NP, move packets from the + * npqueue to the send queue or the fast queue as appropriate. + * Should be called at splsoftnet. + */ +static void +ppp_requeue(sc) + struct ppp_softc *sc; +{ + struct mbuf *m, **mpp; + struct ifqueue *ifq; + enum NPmode mode; + + for (mpp = &sc->sc_npqueue; (m = *mpp) != NULL; ) { + switch (PPP_PROTOCOL(mtod(m, u_char *))) { + case PPP_IP: + mode = sc->sc_npmode[NP_IP]; + break; + default: + mode = NPMODE_PASS; + } + + switch (mode) { + case NPMODE_PASS: + /* + * This packet can now go on one of the queues to be sent. + */ + *mpp = m->m_nextpkt; + m->m_nextpkt = NULL; + ifq = (m->m_flags & M_HIGHPRI)? &sc->sc_fastq: &sc->sc_if.if_snd; + if (IF_QFULL(ifq)) { + IF_DROP(ifq); + sc->sc_if.if_oerrors++; + sc->sc_stats.ppp_oerrors++; + } else + IF_ENQUEUE(ifq, m); + break; + + case NPMODE_DROP: + case NPMODE_ERROR: + *mpp = m->m_nextpkt; + m_freem(m); + break; + + case NPMODE_QUEUE: + mpp = &m->m_nextpkt; + break; + } + } + sc->sc_npqtail = mpp; +} + +/* + * Transmitter has finished outputting some stuff; + * remember to call sc->sc_start later at splsoftnet. + */ +void +ppp_restart(sc) + struct ppp_softc *sc; +{ + + sc->sc_flags &= ~SC_TBUSY; +/* schednetisr(NETISR_PPP); +*/} + +/* + * Get a packet to send. This procedure is intended to be called at + * splsoftnet, since it may involve time-consuming operations such as + * applying VJ compression, packet compression, address/control and/or + * protocol field compression to the packet. + */ +struct mbuf * +ppp_dequeue(sc) + struct ppp_softc *sc; +{ + struct mbuf *m, *mp; + u_char *cp; + int address, control, protocol; + + /* + * Grab a packet to send: first try the fast queue, then the + * normal queue. + */ + IF_DEQUEUE(&sc->sc_fastq, m); + if (m == NULL) + IF_DEQUEUE(&sc->sc_if.if_snd, m); + if (m == NULL) + return NULL; + + ++sc->sc_stats.ppp_opackets; + + /* + * Extract the ppp header of the new packet. + * The ppp header will be in one mbuf. + */ + cp = mtod(m, u_char *); + address = PPP_ADDRESS(cp); + control = PPP_CONTROL(cp); + protocol = PPP_PROTOCOL(cp); + + switch (protocol) { + case PPP_IP: +#ifdef VJC + /* + * If the packet is a TCP/IP packet, see if we can compress it. + */ + if ((sc->sc_flags & SC_COMP_TCP) && sc->sc_comp != NULL) { + struct ip *ip; + int type; + + mp = m; + ip = (struct ip *) (cp + PPP_HDRLEN); + if (mp->m_len <= PPP_HDRLEN) { + mp = mp->m_next; + if (mp == NULL) + break; + ip = mtod(mp, struct ip *); + } + /* this code assumes the IP/TCP header is in one non-shared mbuf */ + if (ip->ip_p == IPPROTO_TCP) { + type = vj_compress_tcp(mp, ip, sc->sc_comp, + !(sc->sc_flags & SC_NO_TCP_CCID)); + switch (type) { + case TYPE_UNCOMPRESSED_TCP: + protocol = PPP_VJC_UNCOMP; + break; + case TYPE_COMPRESSED_TCP: + protocol = PPP_VJC_COMP; + cp = mtod(m, u_char *); + cp[0] = address; /* header has moved */ + cp[1] = control; + cp[2] = 0; + break; + } + cp[3] = protocol; /* update protocol in PPP header */ + } + } +#endif /* VJC */ + break; + +#ifdef PPP_COMPRESS + case PPP_CCP: + ppp_ccp(sc, m, 0); + break; +#endif /* PPP_COMPRESS */ + } + +#ifdef PPP_COMPRESS + if (protocol != PPP_LCP && protocol != PPP_CCP + && sc->sc_xc_state && (sc->sc_flags & SC_COMP_RUN)) { + struct mbuf *mcomp = NULL; + int slen, clen; + + slen = 0; + for (mp = m; mp != NULL; mp = mp->m_next) + slen += mp->m_len; + clen = (*sc->sc_xcomp->compress) + (sc->sc_xc_state, &mcomp, m, slen, sc->sc_if.if_mtu + PPP_HDRLEN); + if (mcomp != NULL) { + if (sc->sc_flags & SC_CCP_UP) { + /* Send the compressed packet instead of the original. */ + m_freem(m); + m = mcomp; + cp = mtod(m, u_char *); + protocol = cp[3]; + } else { + /* Can't transmit compressed packets until CCP is up. */ + m_freem(mcomp); + } + } + } +#endif /* PPP_COMPRESS */ + + /* + * Compress the address/control and protocol, if possible. + */ + if (sc->sc_flags & SC_COMP_AC && address == PPP_ALLSTATIONS && + control == PPP_UI && protocol != PPP_ALLSTATIONS && + protocol != PPP_LCP) { + /* can compress address/control */ + m->m_data += 2; + m->m_len -= 2; + } + if (sc->sc_flags & SC_COMP_PROT && protocol < 0xFF) { + /* can compress protocol */ + if (mtod(m, u_char *) == cp) { + cp[2] = cp[1]; /* move address/control up */ + cp[1] = cp[0]; + } + ++m->m_data; + --m->m_len; + } + + return m; +} + +/* + * Software interrupt routine, called at splsoftnet. + */ +void +pppintr() +{ + struct ppp_softc *sc; + int i, s, s2; + struct mbuf *m; + + sc = ppp_softc; + for (i = 0; i < NPPP; ++i, ++sc) { + if (!(sc->sc_flags & SC_TBUSY) + && (sc->sc_if.if_snd.ifq_head || sc->sc_fastq.ifq_head)) { + s2 = splimp(); + sc->sc_flags |= SC_TBUSY; + splx(s2); + (*sc->sc_start)(sc); + } + for (;;) { + IF_DEQUEUE(&sc->sc_rawq, m); + if (m == NULL) + break; + ppp_inproc(sc, m); + } + } +} + +#ifdef PPP_COMPRESS +/* + * Handle a CCP packet. `rcvd' is 1 if the packet was received, + * 0 if it is about to be transmitted. + */ +static void +ppp_ccp(sc, m, rcvd) + struct ppp_softc *sc; + struct mbuf *m; + int rcvd; +{ + u_char *dp, *ep; + struct mbuf *mp; + int slen, s; + + /* + * Get a pointer to the data after the PPP header. + */ + if (m->m_len <= PPP_HDRLEN) { + mp = m->m_next; + if (mp == NULL) + return; + dp = (mp != NULL)? mtod(mp, u_char *): NULL; + } else { + mp = m; + dp = mtod(mp, u_char *) + PPP_HDRLEN; + } + + ep = mtod(mp, u_char *) + mp->m_len; + if (dp + CCP_HDRLEN > ep) + return; + slen = CCP_LENGTH(dp); + if (dp + slen > ep) { + if (sc->sc_flags & SC_DEBUG) + printf("if_ppp/ccp: not enough data in mbuf (%p+%x > %p+%x)\n", + dp, slen, mtod(mp, u_char *), mp->m_len); + return; + } + + switch (CCP_CODE(dp)) { + case CCP_CONFREQ: + case CCP_TERMREQ: + case CCP_TERMACK: + /* CCP must be going down - disable compression */ + if (sc->sc_flags & SC_CCP_UP) { + s = splimp(); + sc->sc_flags &= ~(SC_CCP_UP | SC_COMP_RUN | SC_DECOMP_RUN); + splx(s); + } + break; + + case CCP_CONFACK: + if (sc->sc_flags & SC_CCP_OPEN && !(sc->sc_flags & SC_CCP_UP) + && slen >= CCP_HDRLEN + CCP_OPT_MINLEN + && slen >= CCP_OPT_LENGTH(dp + CCP_HDRLEN) + CCP_HDRLEN) { + if (!rcvd) { + /* we're agreeing to send compressed packets. */ + if (sc->sc_xc_state != NULL + && (*sc->sc_xcomp->comp_init) + (sc->sc_xc_state, dp + CCP_HDRLEN, slen - CCP_HDRLEN, + sc->sc_if.if_unit, 0, sc->sc_flags & SC_DEBUG)) { + s = splimp(); + sc->sc_flags |= SC_COMP_RUN; + splx(s); + } + } else { + /* peer is agreeing to send compressed packets. */ + if (sc->sc_rc_state != NULL + && (*sc->sc_rcomp->decomp_init) + (sc->sc_rc_state, dp + CCP_HDRLEN, slen - CCP_HDRLEN, + sc->sc_if.if_unit, 0, sc->sc_mru, + sc->sc_flags & SC_DEBUG)) { + s = splimp(); + sc->sc_flags |= SC_DECOMP_RUN; + sc->sc_flags &= ~(SC_DC_ERROR | SC_DC_FERROR); + splx(s); + } + } + } + break; + + case CCP_RESETACK: + if (sc->sc_flags & SC_CCP_UP) { + if (!rcvd) { + if (sc->sc_xc_state && (sc->sc_flags & SC_COMP_RUN)) + (*sc->sc_xcomp->comp_reset)(sc->sc_xc_state); + } else { + if (sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN)) { + (*sc->sc_rcomp->decomp_reset)(sc->sc_rc_state); + s = splimp(); + sc->sc_flags &= ~SC_DC_ERROR; + splx(s); + } + } + } + break; + } +} + +/* + * CCP is down; free (de)compressor state if necessary. + */ +static void +ppp_ccp_closed(sc) + struct ppp_softc *sc; +{ + if (sc->sc_xc_state) { + (*sc->sc_xcomp->comp_free)(sc->sc_xc_state); + sc->sc_xc_state = NULL; + } + if (sc->sc_rc_state) { + (*sc->sc_rcomp->decomp_free)(sc->sc_rc_state); + sc->sc_rc_state = NULL; + } +} +#endif /* PPP_COMPRESS */ + +/* + * PPP packet input routine. + * The caller has checked and removed the FCS and has inserted + * the address/control bytes and the protocol high byte if they + * were omitted. + */ +void +ppppktin(sc, m, lost) + struct ppp_softc *sc; + struct mbuf *m; + int lost; +{ + + if (lost) + m->m_flags |= M_ERRMARK; + IF_ENQUEUE(&sc->sc_rawq, m); + pppintr(); +} + +/* + * Process a received PPP packet, doing decompression as necessary. + * Should be called at splsoftnet. + */ +#define COMPTYPE(proto) ((proto) == PPP_VJC_COMP? TYPE_COMPRESSED_TCP: \ + TYPE_UNCOMPRESSED_TCP) + +static void +ppp_inproc(sc, m) + struct ppp_softc *sc; + struct mbuf *m; +{ + struct ifnet *ifp = &sc->sc_if; + struct ifqueue *inq; + int s, ilen, xlen, proto, rv; + u_char *cp, adrs, ctrl; + struct mbuf *mp, *dmp = NULL; + u_char *iphdr; + u_int hlen; + + sc->sc_stats.ppp_ipackets++; + + if (sc->sc_flags & SC_LOG_INPKT) { + ilen = 0; + for (mp = m; mp != NULL; mp = mp->m_next) + ilen += mp->m_len; + printf("ppp%d: got %d bytes\n", ifp->if_unit, ilen); + pppdumpm(m); + } + + cp = mtod(m, u_char *); + adrs = PPP_ADDRESS(cp); + ctrl = PPP_CONTROL(cp); + proto = PPP_PROTOCOL(cp); + + if (m->m_flags & M_ERRMARK) { + m->m_flags &= ~M_ERRMARK; + s = splimp(); + sc->sc_flags |= SC_VJ_RESET; + splx(s); + } + +#ifdef PPP_COMPRESS + /* + * Decompress this packet if necessary, update the receiver's + * dictionary, or take appropriate action on a CCP packet. + */ + if (proto == PPP_COMP && sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN) + && !(sc->sc_flags & SC_DC_ERROR) && !(sc->sc_flags & SC_DC_FERROR)) { + /* decompress this packet */ + rv = (*sc->sc_rcomp->decompress)(sc->sc_rc_state, m, &dmp); + if (rv == DECOMP_OK) { + m_freem(m); + if (dmp == NULL) { + /* no error, but no decompressed packet produced */ + return; + } + m = dmp; + cp = mtod(m, u_char *); + proto = PPP_PROTOCOL(cp); + + } else { + /* + * An error has occurred in decompression. + * Pass the compressed packet up to pppd, which may take + * CCP down or issue a Reset-Req. + */ + if (sc->sc_flags & SC_DEBUG) + printf("ppp%d: decompress failed %d\n", ifp->if_unit, rv); + s = splimp(); + sc->sc_flags |= SC_VJ_RESET; + if (rv == DECOMP_ERROR) + sc->sc_flags |= SC_DC_ERROR; + else + sc->sc_flags |= SC_DC_FERROR; + splx(s); + } + + } else { + if (sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN)) { + (*sc->sc_rcomp->incomp)(sc->sc_rc_state, m); + } + if (proto == PPP_CCP) { + ppp_ccp(sc, m, 1); + } + } +#endif + + ilen = 0; + for (mp = m; mp != NULL; mp = mp->m_next) + ilen += mp->m_len; + +#ifdef VJC + if (sc->sc_flags & SC_VJ_RESET) { + /* + * If we've missed a packet, we must toss subsequent compressed + * packets which don't have an explicit connection ID. + */ + if (sc->sc_comp) + vj_uncompress_tcp(NULL, 0, TYPE_ERROR, sc->sc_comp); + s = splimp(); + sc->sc_flags &= ~SC_VJ_RESET; + splx(s); + } + + /* + * See if we have a VJ-compressed packet to uncompress. + */ + if (proto == PPP_VJC_COMP) { + if ((sc->sc_flags & SC_REJ_COMP_TCP) || sc->sc_comp == 0) + goto bad; + + xlen = vj_uncompress_tcp_core(cp + PPP_HDRLEN, m->m_len - PPP_HDRLEN, + ilen - PPP_HDRLEN, TYPE_COMPRESSED_TCP, + sc->sc_comp, &iphdr, &hlen); + + if (xlen <= 0) { + if (sc->sc_flags & SC_DEBUG) + printf("ppp%d: VJ uncompress failed on type comp\n", + ifp->if_unit); + goto bad; + } + + /* Copy the PPP and IP headers into a new mbuf. */ + MGETHDR(mp, M_DONTWAIT, MT_DATA); + if (mp == NULL) + goto bad; + mp->m_len = 0; + mp->m_next = NULL; + if (hlen + PPP_HDRLEN > MHLEN) { + MCLGET(mp, M_DONTWAIT); + if (M_TRAILINGSPACE(mp) < hlen + PPP_HDRLEN) { + m_freem(mp); + goto bad; /* lose if big headers and no clusters */ + } + } + cp = mtod(mp, u_char *); + cp[0] = adrs; + cp[1] = ctrl; + cp[2] = 0; + cp[3] = PPP_IP; + proto = PPP_IP; + bcopy(iphdr, cp + PPP_HDRLEN, hlen); + mp->m_len = hlen + PPP_HDRLEN; + + /* + * Trim the PPP and VJ headers off the old mbuf + * and stick the new and old mbufs together. + */ + m->m_data += PPP_HDRLEN + xlen; + m->m_len -= PPP_HDRLEN + xlen; + if (m->m_len <= M_TRAILINGSPACE(mp)) { + bcopy(mtod(m, u_char *), mtod(mp, u_char *) + mp->m_len, m->m_len); + mp->m_len += m->m_len; + MFREE(m, mp->m_next); + } else + mp->m_next = m; + m = mp; + ilen += hlen - xlen; + + } else if (proto == PPP_VJC_UNCOMP) { + if ((sc->sc_flags & SC_REJ_COMP_TCP) || sc->sc_comp == 0) + goto bad; + + xlen = vj_uncompress_tcp_core(cp + PPP_HDRLEN, m->m_len - PPP_HDRLEN, + ilen - PPP_HDRLEN, TYPE_UNCOMPRESSED_TCP, + sc->sc_comp, &iphdr, &hlen); + + if (xlen < 0) { + if (sc->sc_flags & SC_DEBUG) + printf("ppp%d: VJ uncompress failed on type uncomp\n", + ifp->if_unit); + goto bad; + } + + proto = PPP_IP; + cp[3] = PPP_IP; + } +#endif /* VJC */ + + /* + * If the packet will fit in a header mbuf, don't waste a + * whole cluster on it. + */ + if (ilen <= MHLEN && M_IS_CLUSTER(m)) { + MGETHDR(mp, M_DONTWAIT, MT_DATA); + if (mp != NULL) { + m_copydata(m, 0, ilen, mtod(mp, caddr_t)); + m_freem(m); + m = mp; + m->m_len = ilen; + } + } + m->m_pkthdr.len = ilen; + m->m_pkthdr.rcvif = ifp; + + if ((proto & 0x8000) == 0) { +#ifdef PPP_FILTER + /* + * See whether we want to pass this packet, and + * if it counts as link activity. + */ + adrs = *mtod(m, u_char *); /* save address field */ + *mtod(m, u_char *) = 0; /* indicate inbound */ + if (sc->sc_pass_filt.bf_insns != 0 + && bpf_filter(sc->sc_pass_filt.bf_insns, (u_char *) m, + ilen, 0) == 0) { + /* drop this packet */ + m_freem(m); + return; + } + if (sc->sc_active_filt.bf_insns == 0 + || bpf_filter(sc->sc_active_filt.bf_insns, (u_char *) m, ilen, 0)) + { + microtime(&ppp_time); + + sc->sc_last_recv = ppp_time.tv_sec; + } + + *mtod(m, u_char *) = adrs; +#else + /* + * Record the time that we received this packet. + */ + microtime(&ppp_time); + sc->sc_last_recv = ppp_time.tv_sec; +#endif /* PPP_FILTER */ + } + +#if NBPFILTER > 0 + /* See if bpf wants to look at the packet. */ + if (sc->sc_bpf) + bpf_mtap(sc->sc_bpf, m); +#endif + + rv = 0; + switch (proto) { +#ifdef INET + case PPP_IP: + /* + * IP packet - take off the ppp header and pass it up to IP. + */ + if ((ifp->if_flags & IFF_UP) == 0 + || sc->sc_npmode[NP_IP] != NPMODE_PASS) { + /* interface is down - drop the packet. */ + m_freem(m); + return; + } + m->m_pkthdr.len -= PPP_HDRLEN; + m->m_data += PPP_HDRLEN; + m->m_len -= PPP_HDRLEN; + schednetisr(NETISR_IP); + inq = &ipintrq; + break; +#endif + + default: + /* + * Some other protocol - place on input queue for read(). + */ + inq = &sc->sc_inq; + rv = 1; + break; + } + + /* + * Put the packet on the appropriate input queue. + */ + s = splimp(); + if (IF_QFULL(inq)) { + IF_DROP(inq); + splx(s); + if (sc->sc_flags & SC_DEBUG) + printf("ppp%d: input queue full\n", ifp->if_unit); + ifp->if_iqdrops++; + goto bad; + } + IF_ENQUEUE(inq, m); + splx(s); + ifp->if_ipackets++; + ifp->if_ibytes += ilen; + microtime(&ppp_time); + ifp->if_lastchange = ppp_time; + + if (rv) + (*sc->sc_ctlp)(sc); + + return; + + bad: + m_freem(m); + sc->sc_if.if_ierrors++; + sc->sc_stats.ppp_ierrors++; +} + +#define MAX_DUMP_BYTES 128 + +static void +pppdumpm(m0) + struct mbuf *m0; +{ + char buf[3*MAX_DUMP_BYTES+4]; + char *bp = buf; + struct mbuf *m; + static char digits[] = "0123456789abcdef"; + + for (m = m0; m; m = m->m_next) { + int l = m->m_len; + u_char *rptr = (u_char *)m->m_data; + + while (l--) { + if (bp > buf + sizeof(buf) - 4) + goto done; + *bp++ = digits[*rptr >> 4]; /* convert byte to ascii hex */ + *bp++ = digits[*rptr++ & 0xf]; + } + + if (m->m_next) { + if (bp > buf + sizeof(buf) - 3) + goto done; + *bp++ = '|'; + } else + *bp++ = ' '; + } +done: + if (m) + *bp++ = '>'; + *bp = 0; + printf("%s\n", buf); +} + +#endif /* NPPP > 0 */ diff --git a/c/src/libnetworking/modem/ppp.h b/c/src/libnetworking/modem/ppp.h new file mode 100644 index 0000000000..981ca19041 --- /dev/null +++ b/c/src/libnetworking/modem/ppp.h @@ -0,0 +1,7 @@ +#ifndef __PPP_H__ +#define __PPP_H__ +#define NPPP 1 +#define NBPFILER 0 +#define VJC +/*#define PPP_COMPRESS*/ +#endif diff --git a/c/src/libnetworking/modem/ppp_tty.c b/c/src/libnetworking/modem/ppp_tty.c new file mode 100644 index 0000000000..fc235d2686 --- /dev/null +++ b/c/src/libnetworking/modem/ppp_tty.c @@ -0,0 +1,1106 @@ +/* + * ppp_tty.c - Point-to-Point Protocol (PPP) driver for asynchronous + * tty devices. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * Drew D. Perkins + * Carnegie Mellon University + * 4910 Forbes Ave. + * Pittsburgh, PA 15213 + * (412) 268-8576 + * ddp@andrew.cmu.edu + * + * Based on: + * @(#)if_sl.c 7.6.1.2 (Berkeley) 2/15/89 + * + * Copyright (c) 1987 Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by the University of California, Berkeley. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * Serial Line interface + * + * Rick Adams + * Center for Seismic Studies + * 1300 N 17th Street, Suite 1450 + * Arlington, Virginia 22209 + * (703)276-7900 + * rick@seismo.ARPA + * seismo!rick + * + * Pounded on heavily by Chris Torek (chris@mimsy.umd.edu, umcp-cs!chris). + * Converted to 4.3BSD Beta by Chris Torek. + * Other changes made at Berkeley, based in part on code by Kirk Smith. + * + * Converted to 4.3BSD+ 386BSD by Brad Parker (brad@cayman.com) + * Added VJ tcp header compression; more unified ioctls + * + * Extensively modified by Paul Mackerras (paulus@cs.anu.edu.au). + * Cleaned up a lot of the mbuf-related code to fix bugs that + * caused system crashes and packet corruption. Changed pppstart + * so that it doesn't just give up with a "collision" if the whole + * packet doesn't fit in the output ring buffer. + * + * Added priority queueing for interactive IP packets, following + * the model of if_sl.c, plus hooks for bpf. + * Paul Mackerras (paulus@cs.anu.edu.au). + * + * Adapted to RTEMS by Thomas Doerfler + * based on the package of Tomasz Domin delivered + * in RTEMS snapshot rtems-19991203: + * Splitted hardware-independent driver parts from the hardware-dependent + * parts, integrated into termios with newly defined line-discipline support + */ + +/* Thomas: ppp_tty.c,v 1.3 2000/09/12 19:26:17 thomas Exp */ +/* $Id$ */ +/* from if_sl.c,v 1.11 84/10/04 12:54:47 rick Exp */ +/* from NetBSD: if_ppp.c,v 1.15.2.2 1994/07/28 05:17:58 cgd Exp */ + +#include "ppp.h" +#if NPPP > 0 + +#define VJC +#define PPP_COMPRESS + +#include /* to get right defines */ + +#include +#include +#include +#include +#if 0 +#include +#endif +#include +#include +#include +#if 0 +#include +#endif +#include +#if 0 +#include +#include +#endif + +#include +#include + +#ifdef VJC +#include +#include +#include +#include +#endif + +#include +#include +#include +#include +#include + +#ifdef PPP_FILTER +#include +#endif +#include +#include +#include + +void pppasyncattach __P((void)); +int pppopen __P((struct rtems_termios_tty *tty)); +int pppclose __P((struct rtems_termios_tty *tty)); +int pppread __P((struct rtems_termios_tty *tty, + rtems_libio_rw_args_t *rw_args)); +int pppwrite __P((struct rtems_termios_tty *tty, + rtems_libio_rw_args_t *rw_args)); +int ppptioctl __P((struct rtems_termios_tty *tty, + rtems_libio_ioctl_args_t *args)); +int pppinput __P((int c,struct rtems_termios_tty *tty)); +int pppstart __P((struct rtems_termios_tty *tp)); + +static u_short pppfcs __P((u_short fcs, u_char *cp, int len)); +static void pppasyncstart __P((struct ppp_softc *)); +static void pppasyncctlp __P((struct ppp_softc *)); +static void pppasyncrelinq __P((struct ppp_softc *)); +static void ppp_timeout __P((void *)); +static void pppgetm __P((struct ppp_softc *sc)); +static void pppdumpb __P((u_char *b, int l)); +static void ppplogchar __P((struct ppp_softc *, int)); + +/* + * Some useful mbuf macros not in mbuf.h. + */ +#define M_IS_CLUSTER(m) ((m)->m_flags & M_EXT) + +#define M_DATASTART(m) \ + (M_IS_CLUSTER(m) ? (m)->m_ext.ext_buf : \ + (m)->m_flags & M_PKTHDR ? (m)->m_pktdat : (m)->m_dat) + +#define M_DATASIZE(m) \ + (M_IS_CLUSTER(m) ? (m)->m_ext.ext_size : \ + (m)->m_flags & M_PKTHDR ? MHLEN: MLEN) + +/* + * Does c need to be escaped? + */ +#define ESCAPE_P(c) (sc->sc_asyncmap[(c) >> 5] & (1 << ((c) & 0x1F))) + +/* + * Procedures for using an async tty interface for PPP. + */ + +/* + * compute used space in raw buffer + */ +#define CCOUNT(rb) (((rb).Size+(rb).Head-(rb).Tail) \ + % (rb).Size) +/* + * compute free space in raw buffer + */ +#define FCOUNT(rb) ((rb).Size-CCOUNT(rb)-1) +#define PPP_LOWAT 100 /* Process more output when < LOWAT on queue */ +#define PPP_HIWAT 400 /* Don't start a new packet if HIWAT on que */ +/* FIXME: make dependent on raw buffer size */ + +/* + * Define the PPP line discipline. + */ + +static struct linesw pppdisc = { + pppopen, pppclose, pppread, pppwrite, + pppinput, pppstart, ppptioctl, NULL +}; + +void +pppasyncattach() +{ + linesw[PPPDISC] = pppdisc; +} + +TEXT_SET(pseudo_set, pppasyncattach); + +/* + * Line specific open routine for async tty devices. + * Attach the given tty to the first available ppp unit. + * Called from device open routine or ttioctl. + */ +/* ARGSUSED */ +/* + * Open the PPP device + */ +int +pppopen(struct rtems_termios_tty *tty) +{ + register struct ppp_softc *sc; + rtems_status_code status; + + if ((tty->t_line == PPPDISC)) { + sc = tty->t_sc; + if (sc != NULL && sc->sc_devp == (void *) tty) { + return (0); + } + } + + if ((sc = pppalloc(1)) == NULL) { + return 2; + } + + if (sc->sc_relinq) { + (*sc->sc_relinq)(sc); /* get previous owner to relinquish the unit */ + } + /* + * create communication semaphore + */ + status = rtems_semaphore_create (rtems_build_name ('P', 'P', 'P', + '0'+sc->sc_if.if_unit), + 0, + RTEMS_COUNTING_SEMAPHORE, + RTEMS_NO_PRIORITY_CEILING, + &sc->sem_id); + if (status != RTEMS_SUCCESSFUL) + rtems_fatal_error_occurred (status); + + sc->sc_ilen = 0; + sc->sc_m = NULL; + bzero(sc->sc_asyncmap, sizeof(sc->sc_asyncmap)); + sc->sc_asyncmap[0] = 0xffffffff; + sc->sc_asyncmap[3] = 0x60000000; + sc->sc_rasyncmap = 0; + sc->sc_devp = tty; + sc->sc_start = pppasyncstart; + sc->sc_ctlp = pppasyncctlp; + sc->sc_relinq = pppasyncrelinq; + sc->sc_outm = NULL; + pppgetm(sc); + sc->sc_if.if_flags |= IFF_RUNNING; + sc->sc_if.if_baudrate = 9600; /* FIXME: get line speed from termios */ + + tty->t_sc= (void *)sc; + + return RTEMS_SUCCESSFUL; +} + +/* + * Line specific close routine, called from device close routine + * and from ttioctl. + * Detach the tty from the ppp unit. + * Mimics part of ttyclose(). + */ +int +pppclose(struct rtems_termios_tty *tty) +{ + register struct ppp_softc *sc; + rtems_status_code status; + + + tty->t_line = 0; + sc = tty->t_sc; + if (sc != NULL) { + tty->t_sc = NULL; + if (tty == (struct rtems_termios_tty *) sc->sc_devp) { + rtems_bsdnet_semaphore_obtain(); + pppasyncrelinq(sc); + /* + * delete communication semaphore + */ + status = rtems_semaphore_delete (sc->sem_id); + pppdealloc(sc); + rtems_bsdnet_semaphore_release(); + } + } + return RTEMS_SUCCESSFUL; +} + +/* + * Relinquish the interface unit to another device. + */ +static void +pppasyncrelinq(sc) + struct ppp_softc *sc; +{ + int s; + + if (sc->sc_outm) { + m_freem(sc->sc_outm); + sc->sc_outm = NULL; + } + if (sc->sc_m) { + m_freem(sc->sc_m); + sc->sc_m = NULL; + } + if (sc->sc_flags & SC_TIMEOUT) { + untimeout(ppp_timeout, (void *) sc); + sc->sc_flags &= ~SC_TIMEOUT; + } +} + +/* + * Line specific (tty) read routine. + */ +pppread(struct rtems_termios_tty *tty, + rtems_libio_rw_args_t *rw_args) +{ + char *buffer; + int count=0,maximum; + rtems_status_code status; + + struct mbuf *m, *m0; + register int s; + int error = 0; + rtems_interval ticks; + register struct ppp_softc *sc = (struct ppp_softc *)tty->t_sc; + buffer = rw_args->buffer; + maximum = rw_args->count; + + ticks=1000000/rtems_bsdnet_microseconds_per_tick; + + if (sc == NULL) { + return 0; + } + /* + * Loop waiting for input, checking that nothing disasterous + * happens in the meantime. + */ + for (;;) { + if (sc->sc_inq.ifq_head != NULL) { + break; + } + status=rtems_semaphore_obtain(sc->sem_id,RTEMS_WAIT,ticks); + if (status==RTEMS_TIMEOUT) { + return status; + } + } + rtems_bsdnet_semaphore_obtain(); + IF_DEQUEUE(&sc->sc_inq, m0); + rtems_bsdnet_semaphore_release(); + + for (m = m0; + ((m != NULL) && + (count+m->m_lenm_next) {/* check if packet will fit in buffer */ + memcpy(buffer,mtod(m, u_char *),m->m_len); + count+=m->m_len; + buffer+=m->m_len; + } + m_freem(m0); + rw_args->bytes_moved = count; + + return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED; +} + +/* + * Line specific (tty) write routine. + */ +int +pppwrite(struct rtems_termios_tty *tty, + rtems_libio_rw_args_t *rw_args) +{ + int count,len; + char *out_buffer; + int n,maximum; + + register struct ppp_softc *sc = (struct ppp_softc *)tty->t_sc; + struct sockaddr dst; + struct mbuf *m, *m0, **mp; + + out_buffer = rw_args->buffer; + maximum = rw_args->count; + + rtems_bsdnet_semaphore_obtain(); + for (mp = &m0; maximum; mp = &m->m_next) { + MGET(m, M_WAIT, MT_DATA); + if ((*mp = m) == NULL) { + rtems_bsdnet_semaphore_release(); + m_freem(m0); + return (ENOBUFS); + } + m->m_len = 0; + if (maximum>= MCLBYTES / 2) { + MCLGET(m, M_DONTWAIT); + } + len = M_TRAILINGSPACE(m); + if (len > maximum) { + memcpy(mtod(m, u_char *),out_buffer,maximum); + m->m_len=maximum; + maximum=0; + } + else { + memcpy(mtod(m, u_char *),out_buffer,len); + maximum-=len; + m->m_len=len; + out_buffer+=len; + } + } + + dst.sa_family = AF_UNSPEC; + bcopy(mtod(m0, u_char *), dst.sa_data, PPP_HDRLEN); + m0->m_data += PPP_HDRLEN; + m0->m_len -= PPP_HDRLEN; + + n=pppoutput(&sc->sc_if, m0, &dst, (struct rtentry *)0); + rtems_bsdnet_semaphore_release(); + return n; +} + +/* + * Line specific (tty) ioctl routine. + * This discipline requires that tty device drivers call + * the line specific l_ioctl routine from their ioctl routines. + */ +/* ARGSUSED */ +int +ppptioctl(struct rtems_termios_tty *tty, + rtems_libio_ioctl_args_t *args) +{ + struct ppp_softc *sc=tty->t_sc; + int cmd; + caddr_t data; + int error=RTEMS_SUCCESSFUL; + + data=args->buffer; + cmd=args->command; + + switch (cmd) { + case RTEMS_IO_GET_ATTRIBUTES: + case RTEMS_IO_SET_ATTRIBUTES: + case RTEMS_IO_TCDRAIN: + case TIOCGETD: + case TIOCSETD: + return RTEMS_UNSATISFIED; + break; + case PPPIOCSASYNCMAP: + sc->sc_asyncmap[0] = *(u_int *)data; + break; + + case PPPIOCGASYNCMAP: + *(u_int *)data = sc->sc_asyncmap[0]; + break; + + case PPPIOCSRASYNCMAP: + sc->sc_rasyncmap = *(u_int *)data; + break; + + case TIOCMBIS: + break; + case TIOCMBIC: + break; + case PPPIOCGRASYNCMAP: + *(u_int *)data = sc->sc_rasyncmap; + break; + + case PPPIOCSXASYNCMAP: + bcopy(data, sc->sc_asyncmap, sizeof(sc->sc_asyncmap)); + sc->sc_asyncmap[1] = 0; /* mustn't escape 0x20 - 0x3f */ + sc->sc_asyncmap[2] &= ~0x40000000; /* mustn't escape 0x5e */ + sc->sc_asyncmap[3] |= 0x60000000; /* must escape 0x7d, 0x7e */ + break; + + case PPPIOCGXASYNCMAP: + bcopy(sc->sc_asyncmap, data, sizeof(sc->sc_asyncmap)); + break; + + default: + rtems_bsdnet_semaphore_obtain(); + error = pppioctl(sc, cmd, data, 0, NULL); + if (error == 0 && cmd == PPPIOCSMRU) + pppgetm(sc); + rtems_bsdnet_semaphore_release(); + + } + return error; +} + +/* + * FCS lookup table as calculated by genfcstab. + */ +static u_short fcstab[256] = { + 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, + 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, + 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, + 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, + 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, + 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, + 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, + 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, + 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, + 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, + 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, + 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, + 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, + 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, + 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, + 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, + 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, + 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, + 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, + 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, + 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, + 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, + 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, + 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, + 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, + 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, + 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, + 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, + 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, + 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, + 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, + 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 +}; + +/* + * Calculate a new FCS given the current FCS and the new data. + */ +static u_short +pppfcs(fcs, cp, len) + register u_short fcs; + register u_char *cp; + register int len; +{ + while (len--) + fcs = PPP_FCS(fcs, *cp++); + return (fcs); +} + +/* + * This gets called at splsoftnet from if_ppp.c at various times + * when there is data ready to be sent. + */ +static void +pppasyncstart(sc) + register struct ppp_softc *sc; +{ + /* Call pppstart to start output again if necessary. */ + pppstart(sc->sc_devp); + + /* + * This timeout is needed for operation on a pseudo-tty, + * because the pty code doesn't call pppstart after it has + * drained the t_outq. + */ +/* if (!idle && (sc->sc_flags & SC_TIMEOUT) == 0) { + timeout(ppp_timeout, (void *) sc, 1); + sc->sc_flags |= SC_TIMEOUT; + } +*/ + +} + + +void modem_sendpacket(struct rtems_termios_tty *tty) +{ + struct mbuf *l = NULL; + rtems_unsigned16 status; + int curr; + register struct mbuf *m; + register int len; + register u_char *start, *stop, *cp; + int n, ndone, done, idle; + struct mbuf *m2; + int s; + char c; + register struct ppp_softc *sc=tty->t_sc; + + + while (CCOUNT(tty->rawOutBuf) < PPP_HIWAT) { + /* + * See if we have an existing packet partly sent. + * If not, get a new packet and start sending it. + */ + m = sc->sc_outm; + if (m == NULL) { + /* + * Get another packet to be sent. + + */ + m = ppp_dequeue(sc); + if (m == NULL) + { + break; + } + + /* + * The extra PPP_FLAG will start up a new packet, and thus + * will flush any accumulated garbage. We do this whenever + * the line may have been idle for some time. + */ + if (CCOUNT(tty->rawOutBuf) == 0) { + ++sc->sc_stats.ppp_obytes; + c = PPP_FLAG; + rtems_termios_puts(&c,1,tty); + } + + /* Calculate the FCS for the first mbuf's worth. */ + sc->sc_outfcs = pppfcs(PPP_INITFCS, mtod(m, u_char *), m->m_len); + microtime(&sc->sc_if.if_lastchange); + } + + for (;;) { + start = mtod(m, u_char *); + len = m->m_len; + stop = start + len; + while (len > 0) { + /* + * Find out how many bytes in the string we can + * handle without doing something special. + */ + for (cp = start; cp < stop; cp++) + if (ESCAPE_P(*cp)) + break; + n = cp - start; + if (n) { + register int i; + i = FCOUNT(tty->rawOutBuf); + if (n < i) { + i = n; + } + if (i > 0) { + rtems_termios_puts(start,i,tty); + } + ndone = i; + len -= ndone; + start += ndone; + sc->sc_stats.ppp_obytes += ndone; + + if (ndone < n) + break; /* packet doesn't fit */ + } + /* + * If there are characters left in the mbuf, + * the first one must be special. + * Put it out in a different form. + */ + if (len) { + if (FCOUNT(tty->rawOutBuf) < 2) { + break; + } + else { + char str[2]; + str[0] = PPP_ESCAPE; + str[1] = *start ^ PPP_TRANS; + rtems_termios_puts(str,2,tty); + } + sc->sc_stats.ppp_obytes += 2; + start++; + len--; + } + } + + /* + * If we didn't empty this mbuf, remember where we're up to. + * If we emptied the last mbuf, try to add the FCS and closing + * flag, and if we can't, leave sc_outm pointing to m, but with + * m->m_len == 0, to remind us to output the FCS and flag later. + */ + done = len == 0; + if (done && m->m_next == NULL) { + u_char *p, *q; + int c; + u_char endseq[8]; + + /* + * We may have to escape the bytes in the FCS. + */ + p = endseq; + c = ~sc->sc_outfcs & 0xFF; + if (ESCAPE_P(c)) { + *p++ = PPP_ESCAPE; + *p++ = c ^ PPP_TRANS; + } else + *p++ = c; + c = (~sc->sc_outfcs >> 8) & 0xFF; + if (ESCAPE_P(c)) { + *p++ = PPP_ESCAPE; + *p++ = c ^ PPP_TRANS; + } else + *p++ = c; + *p++ = PPP_FLAG; + + /* + * Try to output the FCS and flag. If the bytes + * don't all fit, back out. + */ + if (FCOUNT(tty->rawOutBuf) > (p-endseq)) { + rtems_termios_puts(endseq,p-endseq,tty); + } + else { + done = 0; + } + if (done) + sc->sc_stats.ppp_obytes += p - endseq; + } + + if (!done) { + /* remember where we got to */ + m->m_data = start; + m->m_len = len; + break; + } + + /* Finished with this mbuf; free it and move on. */ + MFREE(m, m2); + m = m2; + if (m == NULL) { + /* Finished a packet */ + break; + } + sc->sc_outfcs = pppfcs(sc->sc_outfcs, mtod(m, u_char *), m->m_len); + } + + /* + * If m == NULL, we have finished a packet. + * If m != NULL, we've either done as much work this time + * as we need to, or else we've filled up the output queue. + */ + sc->sc_outm = m; + if (m) + break; + } +} + +/* + * This gets called when a received packet is placed on + * the inq, at splsoftnet. + */ + +static void +pppasyncctlp(sc) + struct ppp_softc *sc; +{ + rtems_semaphore_release(sc->sem_id); +} + +/* Put data in input queue */ +int +pppstart(struct rtems_termios_tty *tp) +{ + register struct ppp_softc *sc = tp->t_sc; + + /* + * If there is stuff in the output queue, send it now. + * We are being called in lieu of ttstart and must do what it would. + */ + sc->sc_if.if_flags |= IFF_OACTIVE; + + /* + * If the transmit queue has drained and the tty has not hung up + * or been disconnected from the ppp unit, then tell if_ppp.c that + * we need more output. + */ + if (CCOUNT(tp->rawOutBuf) < PPP_LOWAT + /* && !((tp->t_state & TS_CARR_ON) == 0 && (tp->t_cflag & CLOCAL) == 0)*/ + && sc != NULL && tp == (struct rtems_termios_tty *) sc->sc_devp) { + modem_sendpacket(tp); + } + + return 0; +} + +/* + * Timeout routine - try to start some more output. + */ +static void +ppp_timeout(x) + void *x; +{ + struct rtems_termios_tty *tty = ((struct rtems_termios_tty *)x); + struct ppp_softc *sc = tty->t_sc; + struct rtems_termios_tty *tp = (struct rtems_termios_tty *) sc->sc_devp; + int s; + + sc->sc_flags &= ~SC_TIMEOUT; + pppstart(tp); +} + + +/* + * Allocate enough mbuf to handle current MRU. + */ +static void +pppgetm(sc) + register struct ppp_softc *sc; +{ + struct mbuf *m, **mp; + int len; + + mp = &sc->sc_m; + for (len = sc->sc_mru + PPP_HDRLEN + PPP_FCSLEN; len > 0; ){ + if ((m = *mp) == NULL) { + MGETHDR(m, M_DONTWAIT, MT_DATA); + if (m == NULL) + break; + *mp = m; + MCLGET(m, M_DONTWAIT); + } + len -= M_DATASIZE(m); + mp = &m->m_next; + } +} + +/* + * tty interface receiver interrupt. + */ +static unsigned paritytab[8] = { + 0x96696996, 0x69969669, 0x69969669, 0x96696996, + 0x69969669, 0x96696996, 0x96696996, 0x69969669 +}; + + +int +pppinput(int c,struct rtems_termios_tty *tty) + +{ + register struct ppp_softc *sc=tty->t_sc; + struct mbuf *m; + int ilen, s; + + if (sc == NULL ) + return 0; + + ++sc->sc_stats.ppp_ibytes; + +#if 0 + if (c & TTY_FE) { + /* framing error or overrun on this char - abort packet */ + if (sc->sc_flags & SC_DEBUG) + printf("ppp%d: bad char %x\n", sc->sc_if.if_unit, c); + goto flush; + } +#endif + + c &= 0xff; + + /* + * Handle software flow control of output. + */ +/* if (tp->t_iflag & IXON) { + if (c == tp->t_cc[VSTOP] ) { + if ((tp->t_state & TS_TTSTOP) == 0) { + tp->t_state |= TS_TTSTOP; + sccppp_stop_transmission(tp); + } + return 0; + } + if (c == tp->t_cc[VSTART] ) { + tp->t_state &= ~TS_TTSTOP; + sccppp_start_transmission(tp); + return 0; + } + } +*/ + + if (c & 0x80) + sc->sc_flags |= SC_RCV_B7_1; + else + sc->sc_flags |= SC_RCV_B7_0; + if (paritytab[c >> 5] & (1 << (c & 0x1F))) + sc->sc_flags |= SC_RCV_ODDP; + else + sc->sc_flags |= SC_RCV_EVNP; + + + if (sc->sc_flags & SC_LOG_RAWIN) + ppplogchar(sc, c); + + if (c == PPP_FLAG) { + ilen = sc->sc_ilen; + sc->sc_ilen = 0; + + if (sc->sc_rawin_count > 0) + ppplogchar(sc, -1); + + /* + * If SC_ESCAPED is set, then we've seen the packet + * abort sequence + */ + if (sc->sc_flags & (SC_FLUSH | SC_ESCAPED) + || (ilen > 0 && sc->sc_fcs != PPP_GOODFCS)) { + sc->sc_flags |= SC_PKTLOST; /* note the dropped packet */ + if ((sc->sc_flags & (SC_FLUSH | SC_ESCAPED)) == 0){ + if (sc->sc_flags & SC_DEBUG) + printf("ppp%d: bad fcs %x, pkt len %d\n", + sc->sc_if.if_unit, sc->sc_fcs, ilen); + sc->sc_if.if_ierrors++; + sc->sc_stats.ppp_ierrors++; + } else + sc->sc_flags &= ~(SC_FLUSH | SC_ESCAPED); + return 0; + } + + if (ilen < PPP_HDRLEN + PPP_FCSLEN) { + if (ilen) { + if (sc->sc_flags & SC_DEBUG) + printf("ppp%d: too short (%d)\n", sc->sc_if.if_unit, ilen); + sc->sc_if.if_ierrors++; + sc->sc_stats.ppp_ierrors++; + sc->sc_flags |= SC_PKTLOST; + splx(s); + } + return 0; + } + + /* + * Remove FCS trailer. Somewhat painful... + */ + ilen -= 2; + if (--sc->sc_mc->m_len == 0) { + for (m = sc->sc_m; m->m_next != sc->sc_mc; m = m->m_next) + ; + sc->sc_mc = m; + } + sc->sc_mc->m_len--; + + /* excise this mbuf chain */ + m = sc->sc_m; + sc->sc_m = sc->sc_mc->m_next; + sc->sc_mc->m_next = NULL; + ppppktin(sc, m, sc->sc_flags & SC_PKTLOST); + if (sc->sc_flags & SC_PKTLOST) { + sc->sc_flags &= ~SC_PKTLOST; + } + + pppgetm(sc); + return 0; + } + + if (sc->sc_flags & SC_FLUSH) { + if (sc->sc_flags & SC_LOG_FLUSH) + ppplogchar(sc, c); + return 0; + } + + if (c < 0x20 && (sc->sc_rasyncmap & (1 << c))) + return 0; + + if (sc->sc_flags & SC_ESCAPED) { + sc->sc_flags &= ~SC_ESCAPED; + c ^= PPP_TRANS; + } else if (c == PPP_ESCAPE) { + sc->sc_flags |= SC_ESCAPED; + return 0; + } + + /* + * Initialize buffer on first octet received. + * First octet could be address or protocol (when compressing + * address/control). + * Second octet is control. + * Third octet is first or second (when compressing protocol) + * octet of protocol. + * Fourth octet is second octet of protocol. + */ + if (sc->sc_ilen == 0) { + /* reset the first input mbuf */ + if (sc->sc_m == NULL) { + pppgetm(sc); + if (sc->sc_m == NULL) { + if (sc->sc_flags & SC_DEBUG) + printf("ppp%d: no input mbufs!\n", sc->sc_if.if_unit); + goto flush; + } + } + m = sc->sc_m; + m->m_len = 0; + m->m_data = M_DATASTART(sc->sc_m); + sc->sc_mc = m; + sc->sc_mp = mtod(m, char *); + sc->sc_fcs = PPP_INITFCS; + if (c != PPP_ALLSTATIONS) { + if (sc->sc_flags & SC_REJ_COMP_AC) { + if (sc->sc_flags & SC_DEBUG) + printf("ppp%d: garbage received: 0x%x (need 0xFF)\n", + sc->sc_if.if_unit, c); + goto flush; + } + *sc->sc_mp++ = PPP_ALLSTATIONS; + *sc->sc_mp++ = PPP_UI; + sc->sc_ilen += 2; + m->m_len += 2; + } + } + if (sc->sc_ilen == 1 && c != PPP_UI) { + if (sc->sc_flags & SC_DEBUG) + printf("ppp%d: missing UI (0x3), got 0x%x\n", + sc->sc_if.if_unit, c); + goto flush; + } + if (sc->sc_ilen == 2 && (c & 1) == 1) { + /* a compressed protocol */ + *sc->sc_mp++ = 0; + sc->sc_ilen++; + sc->sc_mc->m_len++; + } + if (sc->sc_ilen == 3 && (c & 1) == 0) { + if (sc->sc_flags & SC_DEBUG) + printf("ppp%d: bad protocol %x\n", sc->sc_if.if_unit, + (sc->sc_mp[-1] << 8) + c); + goto flush; + } + + /* packet beyond configured mru? */ + if (++sc->sc_ilen > sc->sc_mru + PPP_HDRLEN + PPP_FCSLEN) { + if (sc->sc_flags & SC_DEBUG) + printf("ppp%d: packet too big\n", sc->sc_if.if_unit); + goto flush; + } + + /* is this mbuf full? */ + m = sc->sc_mc; + if (M_TRAILINGSPACE(m) <= 0) { + if (m->m_next == NULL) { + pppgetm(sc); + if (m->m_next == NULL) { + if (sc->sc_flags & SC_DEBUG) + printf("ppp%d: too few input mbufs!\n", sc->sc_if.if_unit); + goto flush; + } + } + sc->sc_mc = m = m->m_next; + m->m_len = 0; + m->m_data = M_DATASTART(m); + sc->sc_mp = mtod(m, char *); + } + + ++m->m_len; + *sc->sc_mp++ = c; + sc->sc_fcs = PPP_FCS(sc->sc_fcs, c); + return 0; + + flush: + if (!(sc->sc_flags & SC_FLUSH)) { + sc->sc_if.if_ierrors++; + sc->sc_stats.ppp_ierrors++; + sc->sc_flags |= SC_FLUSH; + if (sc->sc_flags & SC_LOG_FLUSH) + ppplogchar(sc, c); + } + return 0; +} + + +#define MAX_DUMP_BYTES 128 + +static void +ppplogchar(sc, c) + struct ppp_softc *sc; + int c; +{ + if (c >= 0) + sc->sc_rawin[sc->sc_rawin_count++] = c; + if (sc->sc_rawin_count >= sizeof(sc->sc_rawin) + || (c < 0 && sc->sc_rawin_count > 0)) { + printf("ppp%d input: ", sc->sc_if.if_unit); + pppdumpb(sc->sc_rawin, sc->sc_rawin_count); + sc->sc_rawin_count = 0; + } +} + +static void +pppdumpb(b, l) + u_char *b; + int l; +{ + char buf[3*MAX_DUMP_BYTES+4]; + char *bp = buf; + static char digits[] = "0123456789abcdef"; + + while (l--) { + if (bp >= buf + sizeof(buf) - 3) { + *bp++ = '>'; + break; + } + *bp++ = digits[*b >> 4]; /* convert byte to ascii hex */ + *bp++ = digits[*b++ & 0xf]; + *bp++ = ' '; + } + + *bp = 0; + printf("%s\n", buf); +} + +#endif /* NPPP > 0 */ diff --git a/c/src/libnetworking/modem/pppcompress.c b/c/src/libnetworking/modem/pppcompress.c new file mode 100644 index 0000000000..a7d2734c8d --- /dev/null +++ b/c/src/libnetworking/modem/pppcompress.c @@ -0,0 +1,593 @@ +/*- + * Copyright (c) 1989 The Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)slcompress.c 7.7 (Berkeley) 5/7/91 + */ + +/* + * Routines to compress and uncompess tcp packets (for transmission + * over low speed serial lines. + * + * Van Jacobson (van@helios.ee.lbl.gov), Dec 31, 1989: + * - Initial distribution. + * + * $Id$ + */ + +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include + +#ifndef SL_NO_STATS +#define INCR(counter) ++comp->counter; +#else +#define INCR(counter) +#endif + +#define BCMP(p1, p2, n) bcmp((char *)(p1), (char *)(p2), (int)(n)) +#define BCOPY(p1, p2, n) bcopy((char *)(p1), (char *)(p2), (int)(n)) +#ifndef KERNEL +#define ovbcopy bcopy +#endif + +void +vj_compress_init(comp, max_state) + struct vjcompress *comp; + int max_state; +{ + register u_int i; + register struct cstate *tstate = comp->tstate; + + if ((unsigned) max_state > MAX_STATES - 1) + max_state = MAX_STATES - 1; + bzero((char *)comp, sizeof(*comp)); + for (i = max_state; i > 0; --i) { + tstate[i].cs_id = i; + tstate[i].cs_next = &tstate[i - 1]; + } + tstate[0].cs_next = &tstate[max_state]; + tstate[0].cs_id = 0; + comp->last_cs = &tstate[0]; + comp->last_recv = 255; + comp->last_xmit = 255; + comp->flags = SLF_TOSS; +} + + +/* ENCODE encodes a number that is known to be non-zero. ENCODEZ + * checks for zero (since zero has to be encoded in the long, 3 byte + * form). + */ +#define ENCODE(n) { \ + if ((u_short)(n) >= 256) { \ + *cp++ = 0; \ + cp[1] = (n); \ + cp[0] = (n) >> 8; \ + cp += 2; \ + } else { \ + *cp++ = (n); \ + } \ +} +#define ENCODEZ(n) { \ + if ((u_short)(n) >= 256 || (u_short)(n) == 0) { \ + *cp++ = 0; \ + cp[1] = (n); \ + cp[0] = (n) >> 8; \ + cp += 2; \ + } else { \ + *cp++ = (n); \ + } \ +} + +#define DECODEL(f) { \ + if (*cp == 0) {\ + (f) = htonl(ntohl(f) + ((cp[1] << 8) | cp[2])); \ + cp += 3; \ + } else { \ + (f) = htonl(ntohl(f) + (u_long)*cp++); \ + } \ +} + +#define DECODES(f) { \ + if (*cp == 0) {\ + (f) = htons(ntohs(f) + ((cp[1] << 8) | cp[2])); \ + cp += 3; \ + } else { \ + (f) = htons(ntohs(f) + (u_long)*cp++); \ + } \ +} + +#define DECODEU(f) { \ + if (*cp == 0) {\ + (f) = htons((cp[1] << 8) | cp[2]); \ + cp += 3; \ + } else { \ + (f) = htons((u_long)*cp++); \ + } \ +} + +u_int +vj_compress_tcp(m, ip, comp, compress_cid) + struct mbuf *m; + register struct ip *ip; + struct vjcompress *comp; + int compress_cid; +{ + register struct cstate *cs = comp->last_cs->cs_next; + register u_int hlen = ip->ip_hl; + register struct tcphdr *oth; + register struct tcphdr *th; + register u_int deltaS, deltaA; + register u_int changes = 0; + u_char new_seq[16]; + register u_char *cp = new_seq; + + /* + * Bail if this is an IP fragment or if the TCP packet isn't + * `compressible' (i.e., ACK isn't set or some other control bit is + * set). (We assume that the caller has already made sure the + * packet is IP proto TCP). + */ + if ((ip->ip_off & htons(0x3fff)) || m->m_len < 40) + return (TYPE_IP); + + th = (struct tcphdr *)&((int *)ip)[hlen]; + if ((th->th_flags & (TH_SYN|TH_FIN|TH_RST|TH_ACK)) != TH_ACK) + return (TYPE_IP); + /* + * Packet is compressible -- we're going to send either a + * COMPRESSED_TCP or UNCOMPRESSED_TCP packet. Either way we need + * to locate (or create) the connection state. Special case the + * most recently used connection since it's most likely to be used + * again & we don't have to do any reordering if it's used. + */ + INCR(sls_packets) + if (ip->ip_src.s_addr != cs->cs_ip.ip_src.s_addr || + ip->ip_dst.s_addr != cs->cs_ip.ip_dst.s_addr || + *(int *)th != ((int *)&cs->cs_ip)[cs->cs_ip.ip_hl]) { + /* + * Wasn't the first -- search for it. + * + * States are kept in a circularly linked list with + * last_cs pointing to the end of the list. The + * list is kept in lru order by moving a state to the + * head of the list whenever it is referenced. Since + * the list is short and, empirically, the connection + * we want is almost always near the front, we locate + * states via linear search. If we don't find a state + * for the datagram, the oldest state is (re-)used. + */ + register struct cstate *lcs; + register struct cstate *lastcs = comp->last_cs; + + do { + lcs = cs; cs = cs->cs_next; + INCR(sls_searches) + if (ip->ip_src.s_addr == cs->cs_ip.ip_src.s_addr + && ip->ip_dst.s_addr == cs->cs_ip.ip_dst.s_addr + && *(int *)th == ((int *)&cs->cs_ip)[cs->cs_ip.ip_hl]) + goto found; + } while (cs != lastcs); + + /* + * Didn't find it -- re-use oldest cstate. Send an + * uncompressed packet that tells the other side what + * connection number we're using for this conversation. + * Note that since the state list is circular, the oldest + * state points to the newest and we only need to set + * last_cs to update the lru linkage. + */ + INCR(sls_misses) + comp->last_cs = lcs; + hlen += th->th_off; + hlen <<= 2; + goto uncompressed; + + found: + /* + * Found it -- move to the front on the connection list. + */ + if (cs == lastcs) + comp->last_cs = lcs; + else { + lcs->cs_next = cs->cs_next; + cs->cs_next = lastcs->cs_next; + lastcs->cs_next = cs; + } + } + + /* + * Make sure that only what we expect to change changed. The first + * line of the `if' checks the IP protocol version, header length & + * type of service. The 2nd line checks the "Don't fragment" bit. + * The 3rd line checks the time-to-live and protocol (the protocol + * check is unnecessary but costless). The 4th line checks the TCP + * header length. The 5th line checks IP options, if any. The 6th + * line checks TCP options, if any. If any of these things are + * different between the previous & current datagram, we send the + * current datagram `uncompressed'. + */ + oth = (struct tcphdr *)&((int *)&cs->cs_ip)[hlen]; + deltaS = hlen; + hlen += th->th_off; + hlen <<= 2; + + if (((u_short *)ip)[0] != ((u_short *)&cs->cs_ip)[0] || + ((u_short *)ip)[3] != ((u_short *)&cs->cs_ip)[3] || + ((u_short *)ip)[4] != ((u_short *)&cs->cs_ip)[4] || + th->th_off != oth->th_off || + (deltaS > 5 && + BCMP(ip + 1, &cs->cs_ip + 1, (deltaS - 5) << 2)) || + (th->th_off > 5 && + BCMP(th + 1, oth + 1, (th->th_off - 5) << 2))) + goto uncompressed; + + /* + * Figure out which of the changing fields changed. The + * receiver expects changes in the order: urgent, window, + * ack, seq (the order minimizes the number of temporaries + * needed in this section of code). + */ + if (th->th_flags & TH_URG) { + deltaS = ntohs(th->th_urp); + ENCODEZ(deltaS); + changes |= NEW_U; + } else if (th->th_urp != oth->th_urp) + /* argh! URG not set but urp changed -- a sensible + * implementation should never do this but RFC793 + * doesn't prohibit the change so we have to deal + * with it. */ + goto uncompressed; + + if (deltaS = (u_short)(ntohs(th->th_win) - ntohs(oth->th_win))) { + ENCODE(deltaS); + changes |= NEW_W; + } + + if (deltaA = ntohl(th->th_ack) - ntohl(oth->th_ack)) { + if (deltaA > 0xffff) + goto uncompressed; + ENCODE(deltaA); + changes |= NEW_A; + } + + if (deltaS = ntohl(th->th_seq) - ntohl(oth->th_seq)) { + if (deltaS > 0xffff) + goto uncompressed; + ENCODE(deltaS); + changes |= NEW_S; + } + + switch(changes) { + + case 0: + /* + * Nothing changed. If this packet contains data and the + * last one didn't, this is probably a data packet following + * an ack (normal on an interactive connection) and we send + * it compressed. Otherwise it's probably a retransmit, + * retransmitted ack or window probe. Send it uncompressed + * in case the other side missed the compressed version. + */ + if (ip->ip_len != cs->cs_ip.ip_len && + ntohs(cs->cs_ip.ip_len) == hlen) + break; + + /* (fall through) */ + + case SPECIAL_I: + case SPECIAL_D: + /* + * actual changes match one of our special case encodings -- + * send packet uncompressed. + */ + goto uncompressed; + + case NEW_S|NEW_A: + if (deltaS == deltaA && + deltaS == ntohs(cs->cs_ip.ip_len) - hlen) { + /* special case for echoed terminal traffic */ + changes = SPECIAL_I; + cp = new_seq; + } + break; + + case NEW_S: + if (deltaS == ntohs(cs->cs_ip.ip_len) - hlen) { + /* special case for data xfer */ + changes = SPECIAL_D; + cp = new_seq; + } + break; + } + + deltaS = ntohs(ip->ip_id) - ntohs(cs->cs_ip.ip_id); + if (deltaS != 1) { + ENCODEZ(deltaS); + changes |= NEW_I; + } + if (th->th_flags & TH_PUSH) + changes |= TCP_PUSH_BIT; + /* + * Grab the cksum before we overwrite it below. Then update our + * state with this packet's header. + */ + deltaA = ntohs(th->th_sum); + BCOPY(ip, &cs->cs_ip, hlen); + + /* + * We want to use the original packet as our compressed packet. + * (cp - new_seq) is the number of bytes we need for compressed + * sequence numbers. In addition we need one byte for the change + * mask, one for the connection id and two for the tcp checksum. + * So, (cp - new_seq) + 4 bytes of header are needed. hlen is how + * many bytes of the original packet to toss so subtract the two to + * get the new packet size. + */ + deltaS = cp - new_seq; + cp = (u_char *)ip; + if (compress_cid == 0 || comp->last_xmit != cs->cs_id) { + comp->last_xmit = cs->cs_id; + hlen -= deltaS + 4; + cp += hlen; + *cp++ = changes | NEW_C; + *cp++ = cs->cs_id; + } else { + hlen -= deltaS + 3; + cp += hlen; + *cp++ = changes; + } + m->m_len -= hlen; + m->m_data += hlen; + *cp++ = deltaA >> 8; + *cp++ = deltaA; + BCOPY(new_seq, cp, deltaS); + INCR(sls_compressed) + return (TYPE_COMPRESSED_TCP); + + /* + * Update connection state cs & send uncompressed packet ('uncompressed' + * means a regular ip/tcp packet but with the 'conversation id' we hope + * to use on future compressed packets in the protocol field). + */ +uncompressed: + BCOPY(ip, &cs->cs_ip, hlen); + ip->ip_p = cs->cs_id; + comp->last_xmit = cs->cs_id; + return (TYPE_UNCOMPRESSED_TCP); +} + + +int +vj_uncompress_tcp(bufp, len, type, comp) + u_char **bufp; + int len; + u_int type; + struct vjcompress *comp; +{ + u_char *hdr, *cp; + int hlen, vjlen; + + cp = bufp? *bufp: NULL; + vjlen = vj_uncompress_tcp_core(cp, len, len, type, comp, &hdr, &hlen); + if (vjlen < 0) + return (0); /* error */ + if (vjlen == 0) + return (len); /* was uncompressed already */ + + cp += vjlen; + len -= vjlen; + + /* + * At this point, cp points to the first byte of data in the + * packet. If we're not aligned on a 4-byte boundary, copy the + * data down so the ip & tcp headers will be aligned. Then back up + * cp by the tcp/ip header length to make room for the reconstructed + * header (we assume the packet we were handed has enough space to + * prepend 128 bytes of header). + */ + if ((int)cp & 3) { + if (len > 0) + (void) ovbcopy(cp, (caddr_t)((int)cp &~ 3), len); + cp = (u_char *)((int)cp &~ 3); + } + cp -= hlen; + len += hlen; + BCOPY(hdr, cp, hlen); + + *bufp = cp; + return (len); +} + +/* + * Uncompress a packet of total length total_len. The first buflen + * bytes are at buf; this must include the entire (compressed or + * uncompressed) TCP/IP header. This procedure returns the length + * of the VJ header, with a pointer to the uncompressed IP header + * in *hdrp and its length in *hlenp. + */ +int +vj_uncompress_tcp_core(buf, buflen, total_len, type, comp, hdrp, hlenp) + u_char *buf; + int buflen, total_len; + u_int type; + struct vjcompress *comp; + u_char **hdrp; + u_int *hlenp; +{ + register u_char *cp; + register u_int hlen, changes; + register struct tcphdr *th; + register struct cstate *cs; + register struct ip *ip; + register u_short *bp; + register u_int vjlen; + + switch (type) { + + case TYPE_UNCOMPRESSED_TCP: + ip = (struct ip *) buf; + if (ip->ip_p >= MAX_STATES) + goto bad; + cs = &comp->rstate[comp->last_recv = ip->ip_p]; + comp->flags &=~ SLF_TOSS; + ip->ip_p = IPPROTO_TCP; + /* + * Calculate the size of the TCP/IP header and make sure that + * we don't overflow the space we have available for it. + */ + hlen = ip->ip_hl << 2; + if (hlen + sizeof(struct tcphdr) > buflen) + goto bad; + hlen += ((struct tcphdr *)&((char *)ip)[hlen])->th_off << 2; + if (hlen > MAX_HDR || hlen > buflen) + goto bad; + BCOPY(ip, &cs->cs_ip, hlen); + cs->cs_hlen = hlen; + INCR(sls_uncompressedin) + *hdrp = (u_char *) &cs->cs_ip; + *hlenp = hlen; + return (0); + + default: + goto bad; + + case TYPE_COMPRESSED_TCP: + break; + } + /* We've got a compressed packet. */ + INCR(sls_compressedin) + cp = buf; + changes = *cp++; + if (changes & NEW_C) { + /* Make sure the state index is in range, then grab the state. + * If we have a good state index, clear the 'discard' flag. */ + if (*cp >= MAX_STATES) + goto bad; + + comp->flags &=~ SLF_TOSS; + comp->last_recv = *cp++; + } else { + /* this packet has an implicit state index. If we've + * had a line error since the last time we got an + * explicit state index, we have to toss the packet. */ + if (comp->flags & SLF_TOSS) { + INCR(sls_tossed) + return (-1); + } + } + cs = &comp->rstate[comp->last_recv]; + hlen = cs->cs_ip.ip_hl << 2; + th = (struct tcphdr *)&((u_char *)&cs->cs_ip)[hlen]; + th->th_sum = htons((*cp << 8) | cp[1]); + cp += 2; + if (changes & TCP_PUSH_BIT) + th->th_flags |= TH_PUSH; + else + th->th_flags &=~ TH_PUSH; + + switch (changes & SPECIALS_MASK) { + case SPECIAL_I: + { + register u_int i = ntohs(cs->cs_ip.ip_len) - cs->cs_hlen; + th->th_ack = htonl(ntohl(th->th_ack) + i); + th->th_seq = htonl(ntohl(th->th_seq) + i); + } + break; + + case SPECIAL_D: + th->th_seq = htonl(ntohl(th->th_seq) + ntohs(cs->cs_ip.ip_len) + - cs->cs_hlen); + break; + + default: + if (changes & NEW_U) { + th->th_flags |= TH_URG; + DECODEU(th->th_urp) + } else + th->th_flags &=~ TH_URG; + if (changes & NEW_W) + DECODES(th->th_win) + if (changes & NEW_A) + DECODEL(th->th_ack) + if (changes & NEW_S) + DECODEL(th->th_seq) + break; + } + if (changes & NEW_I) { + DECODES(cs->cs_ip.ip_id) + } else + cs->cs_ip.ip_id = htons(ntohs(cs->cs_ip.ip_id) + 1); + + /* + * At this point, cp points to the first byte of data in the + * packet. Fill in the IP total length and update the IP + * header checksum. + */ + vjlen = cp - buf; + buflen -= vjlen; + if (buflen < 0) + /* we must have dropped some characters (crc should detect + * this but the old slip framing won't) */ + goto bad; + + total_len += cs->cs_hlen - vjlen; + cs->cs_ip.ip_len = htons(total_len); + + /* recompute the ip header checksum */ + bp = (u_short *) &cs->cs_ip; + cs->cs_ip.ip_sum = 0; + for (changes = 0; hlen > 0; hlen -= 2) + changes += *bp++; + changes = (changes & 0xffff) + (changes >> 16); + changes = (changes & 0xffff) + (changes >> 16); + cs->cs_ip.ip_sum = ~ changes; + + *hdrp = (u_char *) &cs->cs_ip; + *hlenp = cs->cs_hlen; + return vjlen; + +bad: + comp->flags |= SLF_TOSS; + INCR(sls_errorin) + return (-1); +} diff --git a/c/src/libnetworking/net/if_pppvar.h b/c/src/libnetworking/net/if_pppvar.h new file mode 100644 index 0000000000..6eb45a6afb --- /dev/null +++ b/c/src/libnetworking/net/if_pppvar.h @@ -0,0 +1,111 @@ +/* $Id$ */ +/* + * if_pppvar.h - private structures and declarations for PPP. + * + * Copyright (c) 1994 The Australian National University. + * All rights reserved. + * + * Permission to use, copy, modify, and distribute this software and its + * documentation is hereby granted, provided that the above copyright + * notice appears in all copies. This software is provided without any + * warranty, express or implied. The Australian National University + * makes no representations about the suitability of this software for + * any purpose. + * + * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY + * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF + * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO + * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, + * OR MODIFICATIONS. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +/* + * Supported network protocols. These values are used for + * indexing sc_npmode. + */ +#define NP_IP 0 /* Internet Protocol */ +#define NUM_NP 1 /* Number of NPs. */ + +/* + * Structure describing each ppp unit. + */ +struct ppp_softc { + struct ifnet sc_if; /* network-visible interface */ + u_int sc_flags; /* control/status bits; see if_ppp.h */ + void *sc_devp; /* pointer to device-dep structure */ + void (*sc_start) __P((struct ppp_softc *)); /* start output proc */ + void (*sc_ctlp) __P((struct ppp_softc *)); /* rcvd control pkt */ + void (*sc_relinq) __P((struct ppp_softc *)); /* relinquish ifunit */ + short sc_mru; /* max receive unit */ + pid_t sc_xfer; /* used in transferring unit */ + struct ifqueue sc_rawq; /* received packets */ + struct ifqueue sc_inq; /* queue of input packets for daemon */ + struct ifqueue sc_fastq; /* interactive output packet q */ + struct mbuf *sc_togo; /* output packet ready to go */ + struct mbuf *sc_npqueue; /* output packets not to be sent yet */ + struct mbuf **sc_npqtail; /* ptr to last next ptr in npqueue */ + struct pppstat sc_stats; /* count of bytes/pkts sent/rcvd */ + caddr_t sc_bpf; /* hook for BPF */ + enum NPmode sc_npmode[NUM_NP]; /* what to do with each NP */ + struct compressor *sc_xcomp; /* transmit compressor */ + void *sc_xc_state; /* transmit compressor state */ + struct compressor *sc_rcomp; /* receive decompressor */ + void *sc_rc_state; /* receive decompressor state */ + time_t sc_last_sent; /* time (secs) last NP pkt sent */ + time_t sc_last_recv; /* time (secs) last NP pkt rcvd */ +#ifdef PPP_FILTER + struct bpf_program sc_pass_filt; /* filter for packets to pass */ + struct bpf_program sc_active_filt; /* filter for "non-idle" packets */ +#endif /* PPP_FILTER */ +#ifdef VJC + struct vjcompress *sc_comp; /* vjc control buffer */ +#endif + + /* Device-dependent part for async lines. */ + ext_accm sc_asyncmap; /* async control character map */ + u_long sc_rasyncmap; /* receive async control char map */ + struct mbuf *sc_outm; /* mbuf chain currently being output */ + struct mbuf *sc_m; /* pointer to input mbuf chain */ + struct mbuf *sc_mc; /* pointer to current input mbuf */ + char *sc_mp; /* ptr to next char in input mbuf */ + short sc_ilen; /* length of input packet so far */ + u_short sc_fcs; /* FCS so far (input) */ + u_short sc_outfcs; /* FCS so far for output packet */ + u_char sc_rawin[16]; /* chars as received */ + int sc_rawin_count; /* # in sc_rawin */ + rtems_id sem_id; /* ID of comm semaphore */ +}; + +struct ppp_softc ppp_softc[NPPP]; + +struct ppp_softc *pppalloc __P((pid_t pid)); +void pppdealloc __P((struct ppp_softc *sc)); +int pppoutput __P((struct ifnet *, struct mbuf *, + struct sockaddr *, struct rtentry *)); +int pppioctl __P((struct ppp_softc *sc, int cmd, caddr_t data, + int flag, struct proc *p)); +void ppp_restart __P((struct ppp_softc *sc)); +void ppppktin __P((struct ppp_softc *sc, struct mbuf *m, int lost)); +struct mbuf *ppp_dequeue __P((struct ppp_softc *sc)); diff --git a/c/src/libnetworking/net/pppcompress.h b/c/src/libnetworking/net/pppcompress.h new file mode 100644 index 0000000000..3f7687e6bb --- /dev/null +++ b/c/src/libnetworking/net/pppcompress.h @@ -0,0 +1,164 @@ +/* + * Definitions for tcp compression routines. + * + * Copyright (c) 1989 Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * Van Jacobson (van@helios.ee.lbl.gov), Dec 31, 1989: + * - Initial distribution. + * + * From: slcompress.h 7.4 90/06/28 + * $Id$ + */ + +#ifndef _NET_PPPCOMPRESS_H_ +#define _NET_PPPCOMPRESS_H_ + +#define MAX_STATES 16 /* must be > 2 and < 256 */ +#define MAX_HDR MLEN /* XXX 4bsd-ism: should really be 128 */ + +/* + * Compressed packet format: + * + * The first octet contains the packet type (top 3 bits), TCP + * 'push' bit, and flags that indicate which of the 4 TCP sequence + * numbers have changed (bottom 5 bits). The next octet is a + * conversation number that associates a saved IP/TCP header with + * the compressed packet. The next two octets are the TCP checksum + * from the original datagram. The next 0 to 15 octets are + * sequence number changes, one change per bit set in the header + * (there may be no changes and there are two special cases where + * the receiver implicitly knows what changed -- see below). + * + * There are 5 numbers which can change (they are always inserted + * in the following order): TCP urgent pointer, window, + * acknowlegement, sequence number and IP ID. (The urgent pointer + * is different from the others in that its value is sent, not the + * change in value.) Since typical use of SLIP links is biased + * toward small packets (see comments on MTU/MSS below), changes + * use a variable length coding with one octet for numbers in the + * range 1 - 255 and 3 octets (0, MSB, LSB) for numbers in the + * range 256 - 65535 or 0. (If the change in sequence number or + * ack is more than 65535, an uncompressed packet is sent.) + */ + +/* + * Packet types (must not conflict with IP protocol version) + * + * The top nibble of the first octet is the packet type. There are + * three possible types: IP (not proto TCP or tcp with one of the + * control flags set); uncompressed TCP (a normal IP/TCP packet but + * with the 8-bit protocol field replaced by an 8-bit connection id -- + * this type of packet syncs the sender & receiver); and compressed + * TCP (described above). + * + * LSB of 4-bit field is TCP "PUSH" bit (a worthless anachronism) and + * is logically part of the 4-bit "changes" field that follows. Top + * three bits are actual packet type. For backward compatibility + * and in the interest of conserving bits, numbers are chosen so the + * IP protocol version number (4) which normally appears in this nibble + * means "IP packet". + */ + +/* packet types */ +#define TYPE_IP 0x40 +#define TYPE_UNCOMPRESSED_TCP 0x70 +#define TYPE_COMPRESSED_TCP 0x80 +#define TYPE_ERROR 0x00 + +/* Bits in first octet of compressed packet */ +#define NEW_C 0x40 /* flag bits for what changed in a packet */ +#define NEW_I 0x20 +#define NEW_S 0x08 +#define NEW_A 0x04 +#define NEW_W 0x02 +#define NEW_U 0x01 + +/* reserved, special-case values of above */ +#define SPECIAL_I (NEW_S|NEW_W|NEW_U) /* echoed interactive traffic */ +#define SPECIAL_D (NEW_S|NEW_A|NEW_W|NEW_U) /* unidirectional data */ +#define SPECIALS_MASK (NEW_S|NEW_A|NEW_W|NEW_U) + +#define TCP_PUSH_BIT 0x10 + + +/* + * "state" data for each active tcp conversation on the wire. This is + * basically a copy of the entire IP/TCP header from the last packet + * we saw from the conversation together with a small identifier + * the transmit & receive ends of the line use to locate saved header. + */ +struct cstate { + struct cstate *cs_next; /* next most recently used cstate (xmit only) */ + u_short cs_hlen; /* size of hdr (receive only) */ + u_char cs_id; /* connection # associated with this state */ + u_char cs_filler; + union { + char csu_hdr[MAX_HDR]; + struct ip csu_ip; /* ip/tcp hdr from most recent packet */ + } slcs_u; +}; +#define cs_ip slcs_u.csu_ip +#define cs_hdr slcs_u.csu_hdr + +/* + * all the state data for one serial line (we need one of these + * per line). + */ +struct vjcompress { + struct cstate *last_cs; /* most recently used tstate */ + u_char last_recv; /* last rcvd conn. id */ + u_char last_xmit; /* last sent conn. id */ + u_short flags; +#ifndef SL_NO_STATS + int sls_packets; /* outbound packets */ + int sls_compressed; /* outbound compressed packets */ + int sls_searches; /* searches for connection state */ + int sls_misses; /* times couldn't find conn. state */ + int sls_uncompressedin; /* inbound uncompressed packets */ + int sls_compressedin; /* inbound compressed packets */ + int sls_errorin; /* inbound unknown type packets */ + int sls_tossed; /* inbound packets tossed because of error */ +#endif + struct cstate tstate[MAX_STATES]; /* xmit connection states */ + struct cstate rstate[MAX_STATES]; /* receive connection states */ +}; +/* flag values */ +#define SLF_TOSS 1 /* tossing rcvd frames because of input err */ + +void vj_compress_init __P((struct vjcompress *, int)); +u_int vj_compress_tcp __P((struct mbuf *, + struct ip *, struct vjcompress *, int)); +int vj_uncompress_tcp __P((u_char **, int, u_int, struct vjcompress *)); +int vj_uncompress_tcp_core __P((u_char *, int, int, u_int, + struct vjcompress *, u_char **, u_int *)); + +#endif /* _NET_PPPCOMPRESS_H_ */ diff --git a/c/src/libnetworking/pppd/pppmain.c b/c/src/libnetworking/pppd/pppmain.c new file mode 100644 index 0000000000..9036dfcb54 --- /dev/null +++ b/c/src/libnetworking/pppd/pppmain.c @@ -0,0 +1,1304 @@ +/* + * main.c - Point-to-Point Protocol main module + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +#ifndef lint +/* static char rcsid[] = "$Id$"; */ +#endif + +#include +#include +/* #include */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* #include */ +#include "pppd.h" +#include "magic.h" +#include "fsm.h" +#include "lcp.h" +#include "ipcp.h" +#include "upap.h" +#include "chap.h" +#include "ccp.h" +#include "pathnames.h" +#include "patchlevel.h" + +#ifdef CBCP_SUPPORT +#include "cbcp.h" +#endif + +#if defined(SUNOS4) +extern char *strerror(); +#endif + +#ifdef IPX_CHANGE +#include "ipxcp.h" +#endif /* IPX_CHANGE */ +#ifdef AT_CHANGE +#include "atcp.h" +#endif + +void SetStatusInfo(int state, char * text, int res); + +/* interface vars */ +char ifname[32]; /* Interface name */ +int interfunit; /* Interface unit number */ + +char *progname; /* Name of this program */ +char hostname[MAXNAMELEN] = "dcna"; /* Our hostname */ +static char default_devnam[MAXPATHLEN]; /* name of default device */ +/*static pid_t pid; */ /* Our pid */ +static uid_t uid; /* Our real user-id */ +static int conn_running; /* we have a [dis]connector running */ + +int ttyfd = -1; /* Serial port file descriptor */ +mode_t tty_mode = -1; /* Original access permissions to tty */ +int baud_rate; /* Actual bits/second for serial device */ +int hungup; /* terminal has been hung up */ +int privileged; /* we're running as real uid root */ +int need_holdoff; /* need holdoff period before restarting */ +int detached; /* have detached from terminal */ + +int phase; /* where the link is at */ +int kill_link; +int open_ccp_flag; + +char **script_env; /* Env. variable values for scripts */ +int s_env_nalloc; /* # words avail at script_env */ + +u_char outpacket_buf[PPP_MRU + PPP_HDRLEN]; /* buffer for outgoing packet */ +u_char inpacket_buf[PPP_MRU + PPP_HDRLEN]; /* buffer for incoming packet */ + + + +char *no_ppp_msg = "lack of PPP\n"; + +/* Prototypes for procedures local to this file. */ +static void cleanup(void); +static void create_pidfile __P((void)); +static void close_tty __P((void)); +static void get_input __P((void)); +static void calltimeout __P((void)); +static struct timeval *timeleft __P((struct timeval *)); +static void holdoff_end __P((void *)); +static int device_script __P((char *[], int, int)); +static void reap_kids __P((void)); +static void pr_log __P((void *, char *,...)); + +extern char *ttyname __P((int)); +extern char *getlogin __P((void)); +int main __P((int, char *[])); + + + + + +/* + * PPP Data Link Layer "protocol" table. + * One entry per supported protocol. + * The last entry must be NULL. + */ +struct protent *protocols[] = +{ + &lcp_protent, + &pap_protent, + &chap_protent, +#ifdef CBCP_SUPPORT + &cbcp_protent, +#endif + &ipcp_protent, + &ccp_protent, +#ifdef IPX_CHANGE + &ipxcp_protent, +#endif +#ifdef AT_CHANGE + &atcp_protent, +#endif + NULL +}; + +extern int connect_stb(); + + +extern int disconnect_stb(); + + +extern struct in_addr rtems_bsdnet_nameserver[]; +extern int rtems_bsdnet_nameserver_count; +extern int __res_init(void); + +int pppdmain(argc, argv) +int argc; +char *argv[]; +{ + int i; + struct timeval timo; + struct protent *protp; + struct stat statbuf; + char t[100]; + + + phase = PHASE_INITIALIZE; + + strcpy(default_devnam, "/dev/modem"); + strcpy(devnam, "/dev/modem"); + + script_env = NULL; + +/* if (gethostname(hostname, MAXNAMELEN) < 0 ) { + die(1); + } + */ + hostname[MAXNAMELEN - 1] = 0; + + uid = 0; + privileged = uid == 0; + + /* + * Initialize to the standard option set, then parse, in order, + * the system options file, the user's options file, + * the tty's options file, and the command line arguments. + */ + for (i = 0; (protp = protocols[i]) != NULL; ++i) + (*protp->init) (0); + + + +#if 1 + if (!ppp_available()) { + exit(1); + } +#endif + /* + * Check that the options given are valid and consistent. + */ + sys_check_options(); + auth_check_options(); + for (i = 0; (protp = protocols[i]) != NULL; ++i) + if (protp->check_options != NULL) + (*protp->check_options) (); + + /* + * If the user has specified the default device name explicitly, + * pretend they hadn't. + */ + if (!default_device && strcmp(devnam, default_devnam) == 0) + default_device = 1; + if (default_device) + nodetach = 1; + + /* + * Initialize system-dependent stuff and magic number package. + */ + sys_init(); + magic_init(); + + /* + * Detach ourselves from the terminal, if required, + * and identify who is running us. + */ + +/* + syslog(LOG_NOTICE, "pppd %s.%d%s started by %s, uid %d", + VERSION, PATCHLEVEL, IMPLEMENTATION, p, uid); +*/ + + + for (;;) { +#if 0 /* FIXME: how do we synchonize? */ + +/* !!! here should be done some kind of synchronization - I did it following way ... */ +/* GlobalSystemStatus is set of different things shared between different tasks ... */ +#if 0 +/* XXX PPPConfiguration */ + GlobalSystemStatus * volatile stat; + stat=LockSTBSystemParam(); + stat->ConnectionStatus = NotConnected; + UnlockSTBSystemParam(); +#endif + + + while (1) { + rtems_event_set events; + int status; + +#if 0 +/* XXX PPPConfiguration */ + stat=LockSTBSystemParam(); + status=stat->WantConnection; + UnlockSTBSystemParam(); + + if (status == Connect) break; +#endif + rtems_event_receive(RTEMS_EVENT_1, RTEMS_WAIT | RTEMS_EVENT_ANY, RTEMS_NO_TIMEOUT, &events); + } +#if 0 +/* XXX PPPConfiguration */ + stat=LockSTBSystemParam(); +/* stat->WantConnection=DontConnect; */ + stat->ConnectionStatus = Connecting; + +/* Here you can change default nameserver ... */ + rtems_bsdnet_nameserver[0].s_addr=inet_addr(stat->DNS); + rtems_bsdnet_nameserver_count=1; + UnlockSTBSystemParam(); +#endif +/* initialize DNS services here */ + SetStatusInfo(0, "Connecting...",0); + + __res_init(); +#endif /* FIXME */ + /* + * Open the serial device and set it up to be the ppp interface. + * First we open it in non-blocking mode so we can set the + * various termios flags appropriately. If we aren't dialling + * out and we want to use the modem lines, we reopen it later + * in order to wait for the carrier detect signal from the modem. + */ + while ((ttyfd = open(devnam, O_NONBLOCK | O_RDWR, 0)) < 0) { + if (errno != EINTR) + syslog(LOG_ERR, "Failed to open %s: %m", devnam); + + if (!persist || errno != EINTR) + goto fail; + } + + hungup = 0; + kill_link = 0; + + /* + * Do the equivalent of `mesg n' to stop broadcast messages. + */ + tty_mode = statbuf.st_mode; + + /* run connection script */ + /* + * Set line speed, flow control, etc. + * On most systems we set CLOCAL for now so that we can talk + * to the modem before carrier comes up. But this has the + * side effect that we might miss it if CD drops before we + * get to clear CLOCAL below. On systems where we can talk + * successfully to the modem with CLOCAL clear and CD down, + * we can clear CLOCAL at this point. + */ + set_up_tty(ttyfd, 1); + + /* drop dtr to hang up in case modem is off hook */ + setdtr(ttyfd, FALSE); + sleep(1); + setdtr(ttyfd, TRUE); + { +/* Make a call ... */ +#if 0 +/* XXX PPPConfiguration */ + char t[100]; + stat=LockSTBSystemParam(); + sprintf(t,"Dzwonię pod numer %s ...",stat->Phone_Number); + UnlockSTBSystemParam(); + SetStatusInfo(0, t,0); +#endif + } + + + if ((i=connect_script(ttyfd)) >0) { +#if 0 +/* here go error messages ... */ + static char *error_msgs[]={ "Bad script", "IO Error" + "Timeout", "Busy", "No dialtone", "No carrier", + "No answer", "No answer from server" }; + setdtr(ttyfd, FALSE); + sprintf(t,"Communication error: %s",error_msgs[i-1]); + syslog(LOG_ERR, "Connect script failed"); + SetStatusInfo(0, t,1); +#endif + goto fail; + } + + else + if (i<0) + { +#if 0 + char t[100]; + sprintf(t,"Łączenie z Internetem z prędkoscią %d baud...",-i); + SetStatusInfo(0, t,0); +#endif + } + else + { +#if 0 + SetStatusInfo(0, "Łączenie z Internetem...",0); +#endif + } + syslog(LOG_INFO, "Serial connection established."); + + sleep(1); /* give it time to set up its terminal */ + + /* set line speed, flow control, etc.; clear CLOCAL if modem option */ + set_up_tty(ttyfd, 0); + + /* reopen tty if necessary to wait for carrier */ + + /* run welcome script, if any */ +/* if (welcomer && welcomer[0]) { + if (device_script(welcomer, 21, ttyfd) < 0) + syslog(LOG_WARNING, "Welcome script failed"); + } + */ + /* set up the serial device as a ppp interface */ + establish_ppp(ttyfd); + +/* syslog(LOG_INFO, "Using interface ppp%d", interfunit); */ + (void) sprintf(ifname, "ppp%d", interfunit); + + /* + * Start opening the connection and wait for + * incoming events (reply, timeout, etc.). + */ +/* syslog(LOG_NOTICE, "Connect: %s <--> %s", ifname, devnam); */ + + rtems_bsdnet_semaphore_obtain(); + + lcp_lowerup(0); + lcp_open(0); /* Start protocol */ + + rtems_bsdnet_semaphore_release(); +#if 0 + SetStatusInfo(0, "Połączenie z Internetem nawiązane.",1); +#endif + for (phase = PHASE_ESTABLISH; phase != PHASE_DEAD;) { +#if 0 + wait_input(timeleft(&timo)); +#endif + calltimeout(); + get_input(); +#if 0 +/* XXX PPPConfiguration */ + stat=LockSTBSystemParam(); + if (stat->WantConnection==DontConnect) { + stat->ConnectionStatus = NotConnected; + SetStatusInfo(0, "Rozłączam się ...",0); + lcp_close(0, ""); + kill_link = 0; + } + UnlockSTBSystemParam(); +#endif + if (open_ccp_flag) { + if (phase == PHASE_NETWORK) { + ccp_fsm[0].flags = OPT_RESTART; /* clears OPT_SILENT */ + (*ccp_protent.open) (0); + } + open_ccp_flag = 0; + } + } + /* + * If we may want to bring the link up again, transfer + * the ppp unit back to the loopback. Set the + * real serial device back to its normal mode of operation. + */ + clean_check(); + disestablish_ppp(ttyfd); +#if 0 + SetStatusInfo(0, "Połączenie z Internetem zerwane.",1); +#endif + /* + * Run disconnector script, if requested. + * XXX we may not be able to do this if the line has hung up! + */ +/* if (disconnector && !hungup) { + set_up_tty(ttyfd, 1); + if (device_script(disconnector, ttyfd, ttyfd) < 0) { + syslog(LOG_WARNING, "disconnect script failed"); + } else { + syslog(LOG_INFO, "Serial link disconnected."); + } + } + */ + fail: +#if 0 +/* XXX PPPConfiguration */ + stat=LockSTBSystemParam(); + stat->ConnectionStatus = NotConnected; + stat->WantConnection=DontConnect; + UnlockSTBSystemParam(); +#endif + if (ttyfd >= 0) + close_tty(); + + + + } + + return 0; +} + +/* + * detach - detach us from the controlling terminal. + */ +void detach() +{ +} + +/* + * holdoff_end - called via a timeout when the holdoff period ends. + */ + +static void holdoff_end(arg) +void *arg; +{ + phase = PHASE_DORMANT; +} + +/* + * get_input - called when incoming data is available. + */ +static void get_input() +{ + int len, i; + u_char *p; + u_short protocol; + struct protent *protp; + + p = inpacket_buf; /* point to beginning of packet buffer */ + + len = read_packet(inpacket_buf); + if (len < 0) + return; + + if (len == 0) { +#if 0 +/* XXX PPPConfiguration */ + GlobalSystemStatus * volatile stat; +#endif +/* syslog(LOG_NOTICE, "Modem hangup"); */ + hungup = 1; +#if 0 +/* XXX PPPConfiguration */ + stat=LockSTBSystemParam(); + stat->ConnectionStatus = NotConnected; + UnlockSTBSystemParam(); +#endif + + lcp_lowerdown(0); /* serial link is no longer available */ + link_terminated(0); + return; + } +/* if ((debug)) + log_packet(p, len, "rcvd ", LOG_DEBUG); +*/ + + if (len < PPP_HDRLEN) { +/* + if (debug) + MAINDEBUG((LOG_INFO, "io(): Received short packet.")); +*/ + return; + } +/* We need to modify internal network structures here */ + rtems_bsdnet_semaphore_obtain(); + + p += 2; /* Skip address and control */ + GETSHORT(protocol, p); + len -= PPP_HDRLEN; + + /* + * Toss all non-LCP packets unless LCP is OPEN. + */ + if (protocol != PPP_LCP && lcp_fsm[0].state != OPENED) { + MAINDEBUG((LOG_INFO, + "get_input: Received non-LCP packet when LCP not open.")); + rtems_bsdnet_semaphore_release(); + return; + } + /* + * Until we get past the authentication phase, toss all packets + * except LCP, LQR and authentication packets. + */ + if (phase <= PHASE_AUTHENTICATE + && !(protocol == PPP_LCP || protocol == PPP_LQR + || protocol == PPP_PAP || protocol == PPP_CHAP)) { + + rtems_bsdnet_semaphore_release(); + return; + } + /* + * Upcall the proper protocol input routine. + */ + for (i = 0; (protp = protocols[i]) != NULL; ++i) { + if (protp->protocol == protocol && protp->enabled_flag) { + (*protp->input) (0, p, len); + rtems_bsdnet_semaphore_release(); + return; + } + if (protocol == (protp->protocol & ~0x8000) && protp->enabled_flag + && protp->datainput != NULL) { + (*protp->datainput) (0, p, len); + rtems_bsdnet_semaphore_release(); + return; + } + } + + lcp_sprotrej(0, p - PPP_HDRLEN, len + PPP_HDRLEN); + rtems_bsdnet_semaphore_release(); +} + + +/* + * quit - Clean up state and exit (with an error indication). + */ +void quit() +{ + die(1); +} + +/* + * die - like quit, except we can specify an exit status. + */ +void die(status) +int status; +{ + cleanup(); +} + +/* + * cleanup - restore anything which needs to be restored before we exit + */ +/* ARGSUSED */ +static void cleanup() +{ + sys_cleanup(); + + if (ttyfd >= 0) + close_tty(); + +} + +/* + * close_tty - restore the terminal device and close it. + */ +static void close_tty() +{ + disestablish_ppp(ttyfd); + + /* drop dtr to hang up */ + setdtr(ttyfd, FALSE); + /* + * This sleep is in case the serial port has CLOCAL set by default, + * and consequently will reassert DTR when we close the device. + */ + sleep(1); + + restore_tty(ttyfd); + close(ttyfd); + ttyfd = -1; +} + + +struct callout { + struct timeval c_time; + void *c_arg; + void (*c_func) __P((void *)); + struct callout *c_next; +}; + +static struct callout *callout = NULL; +static struct timeval timenow; + +/* + * timeout - Schedule a timeout. + * + * Note that this timeout takes the number of seconds, NOT hz (as in + * the kernel). + */ +void my_timeout(func, arg, time) +void (*func) __P((void *)); +void *arg; +int time; +{ + struct callout *newp, *p, **pp; + + MAINDEBUG((LOG_DEBUG, "Timeout %lx:%lx in %d seconds.", + (long) func, (long) arg, time)); + /* + * Allocate timeout. + */ + if ((newp = (struct callout *) malloc(sizeof(struct callout))) == NULL) { +/* syslog(LOG_ERR, "Out of memory in timeout()!"); */ + die(1); + } + newp->c_arg = arg; + newp->c_func = func; + gettimeofday(&timenow, NULL); + newp->c_time.tv_sec = timenow.tv_sec + time; + newp->c_time.tv_usec = timenow.tv_usec; + /* + * Find correct place and link it in. + */ + for (pp = &callout; (p = *pp); pp = &p->c_next) + if (newp->c_time.tv_sec < p->c_time.tv_sec + || (newp->c_time.tv_sec == p->c_time.tv_sec + && newp->c_time.tv_usec < p->c_time.tv_sec)) + break; + newp->c_next = p; + *pp = newp; +} + +/* + * untimeout - Unschedule a timeout. + */ + +void untimeout(func, arg) +void (*func) __P((void *)); +void *arg; +{ + struct callout **copp, *freep; + + MAINDEBUG((LOG_DEBUG, "Untimeout %lx:%lx.", (long) func, (long) arg)); + + for (copp = &callout; (freep = *copp); copp = &freep->c_next) + if (freep->c_func == func && freep->c_arg == arg) { + *copp = freep->c_next; + (void) free((char *) freep); + break; + } +} + + +/* + * calltimeout - Call any timeout routines which are now due. + */ +static void calltimeout() +{ + struct callout *p; + + while (callout != NULL) { + p = callout; + + if (gettimeofday(&timenow, NULL) < 0) { + die(1); + } + if (!(p->c_time.tv_sec < timenow.tv_sec + || (p->c_time.tv_sec == timenow.tv_sec + && p->c_time.tv_usec <= timenow.tv_usec))) + break; /* no, it's not time yet */ + + callout = p->c_next; + (*p->c_func) (p->c_arg); + + free((char *) p); + } +} + + +/* + * timeleft - return the length of time until the next timeout is due. + */ +static struct timeval * + timeleft(tvp) +struct timeval *tvp; +{ + if (callout == NULL) + return NULL; + + gettimeofday(&timenow, NULL); + tvp->tv_sec = callout->c_time.tv_sec - timenow.tv_sec; + tvp->tv_usec = callout->c_time.tv_usec - timenow.tv_usec; + if (tvp->tv_usec < 0) { + tvp->tv_usec += 1000000; + tvp->tv_sec -= 1; + } + if (tvp->tv_sec < 0) + tvp->tv_sec = tvp->tv_usec = 0; + + return tvp; +} + + +/* + * term - Catch SIGTERM signal and SIGINT signal (^C/del). + * + * Indicates that we should initiate a graceful disconnect and exit. + */ +static void term(sig) +int sig; +{ + /* persist = 0; *//* don't try to restart */ + kill_link = 1; +} + +static int input_fd, output_fd; +#include + + + +int modem_fd; /* FIXME: should not be global... */ +int connect_script(int fd) +{ + int status; +#if 0 /* FIXME: This is WinNT special */ + char program[256] = "TIMEOUT@10@@CLIENT@CLIENTSERVER"; +#else + char program[256] = { 0 }; +#endif +#if 0 +/* XXX PPPConfiguration */ + GlobalSystemStatus * volatile stat; +#endif +/* Connect scripts are almost the same as in Linux Chat ... */ + static char *scripts[] = + { + "TIMEOUT@5@@\rAT@OK-+++\\c-OK@ATH0@TIMEOUT@90@OK@ATDT%s@CONNECT@", + "TIMEOUT@5@@\rAT@OK-+++\\c-OK@ATH0@TIMEOUT@90@OK@ATDT%s@CONNECT@@ppp@@Username:@%s@Password:@%s@" + }; + modem_fd = fd; +#if 0 +/* XXX PPPConfiguration */ + stat=LockSTBSystemParam(); + if (strcmp("",stat->PPP_User)) + { + stat->provider=Poland_TPSA; + } + else + stat->provider=DumbLogin; + switch (stat->provider) { + case Poland_TPSA: + sprintf(program, scripts[1], stat->Phone_Number, stat->PPP_User, stat->PPP_Password); + break; + default: + sprintf(program, scripts[0], stat->Phone_Number); + + } + UnlockSTBSystemParam(); +#endif + conn_running = 0; + + return chatmain(program); +} + + +/* + * run-program - execute a program with given arguments, + * but don't wait for it. + * If the program can't be executed, logs an error unless + * must_exist is 0 and the program file doesn't exist. + */ +int run_program(prog, args, must_exist) +char *prog; +char **args; +int must_exist; +{ + + return 0; +} + + +/* + * reap_kids - get status from any dead child processes, + * and log a message for abnormal terminations. + */ +static void reap_kids() +{ +} + + +/* + * log_packet - format a packet and log it. + */ + +char line[256]; +char *linep; + +/*#define log_packet(p, len, prefix, level) */ +void log_packet(p, len, prefix, level) +u_char *p; +int len; +char *prefix; +int level; +{ + strcpy(line, prefix); + linep = line + strlen(line); +/* format_packet(p, len, pr_log, NULL); */ +/* if (linep != line) + syslog(level, "%s", line); + */ +} + +/* + * format_packet - make a readable representation of a packet, + * calling `printer(arg, format, ...)' to output it. + */ +/*#define format_packet(p, len, printer, arg) */ + +void format_packet(p, len, printer, arg) +u_char *p; +int len; +void (*printer) __P((void *, char *,...)); +void *arg; +{ +/* + int i, n; + u_short proto; + struct protent *protp; + + if (len >= PPP_HDRLEN && p[0] == PPP_ALLSTATIONS && p[1] == PPP_UI) { + p += 2; + GETSHORT(proto, p); + len -= PPP_HDRLEN; + for (i = 0; (protp = protocols[i]) != NULL; ++i) + if (proto == protp->protocol) + break; + if (protp != NULL) { + printer(arg, "[%s", protp->name); + n = (*protp->printpkt) (p, len, printer, arg); + printer(arg, "]"); + p += n; + len -= n; + } else { + printer(arg, "[proto=0x%x]", proto); + } + } +*/ +/* for (; len > 0; --len) { + GETCHAR(x, p); + printer(arg, " %.2x", x); + } + */ +} + + + +static void +pr_log __V((void *arg, char *fmt,...)) +{ + int n; + va_list pvar; + char buf[256]; + +#if __STDC__ + va_start(pvar, fmt); +#else + void *arg; + char *fmt; + va_start(pvar); + arg = va_arg(pvar, void *); + fmt = va_arg(pvar, char *); +#endif + + n = vfmtmsg(buf, sizeof(buf), fmt, pvar); + va_end(pvar); + + if (linep + n + 1 > line + sizeof(line)) { +/* syslog(LOG_DEBUG, "%s", line); */ + linep = line; + } + strcpy(linep, buf); + linep += n; +} + +/* + * print_string - print a readable representation of a string using + * printer. + */ +/*#define print_string(p, len, printer, arg) */ + +void print_string(p, len, printer, arg) +char *p; +int len; +void (*printer) __P((void *, char *,...)); +void *arg; +{ + int c; + + printer(arg, "\""); + for (; len > 0; --len) { + c = *p++; + if (' ' <= c && c <= '~') { + if (c == '\\' || c == '"') + printer(arg, "\\"); + printer(arg, "%c", c); + } else { + switch (c) { + case '\n': + printer(arg, "\\n"); + break; + case '\r': + printer(arg, "\\r"); + break; + case '\t': + printer(arg, "\\t"); + break; + default: + printer(arg, "\\%.3o", c); + } + } + } + printer(arg, "\""); +} + + +/* + * novm - log an error message saying we ran out of memory, and die. + */ +void novm(msg) +char *msg; +{ +/* syslog(LOG_ERR, "Virtual memory exhausted allocating %s\n", msg); + */ die(1); +} + +/* + * fmtmsg - format a message into a buffer. Like sprintf except we + * also specify the length of the output buffer, and we handle + * %r (recursive format), %m (error message) and %I (IP address) formats. + * Doesn't do floating-point formats. + * Returns the number of chars put into buf. + */ +int +fmtmsg __V((char *buf, int buflen, char *fmt,...)) +{ + va_list args; + int n; + +#if __STDC__ + va_start(args, fmt); +#else + char *buf; + int buflen; + char *fmt; + va_start(args); + buf = va_arg(args, char *); + buflen = va_arg(args, int); + fmt = va_arg(args, char *); +#endif + n = vfmtmsg(buf, buflen, fmt, args); + va_end(args); + return n; +} + +/* + * vfmtmsg - like fmtmsg, takes a va_list instead of a list of args. + */ +#define OUTCHAR(c) (buflen > 0? (--buflen, *buf++ = (c)): 0) +/*#define vfmtmsg(buf, buflen, fmt, args) */ + +int vfmtmsg(buf, buflen, fmt, args) +char *buf; +int buflen; +char *fmt; +va_list args; +{ +/* int c, i, n; + int width, prec, fillch; + int base, len, neg, quoted; + unsigned long val = 0; + char *str, *f, *buf0; + unsigned char *p; + char num[32]; + time_t t; + static char hexchars[] = "0123456789abcdef"; + + buf0 = buf; + --buflen; + while (buflen > 0) { + for (f = fmt; *f != '%' && *f != 0; ++f) + ; + if (f > fmt) { + len = f - fmt; + if (len > buflen) + len = buflen; + memcpy(buf, fmt, len); + buf += len; + buflen -= len; + fmt = f; + } + if (*fmt == 0) + break; + c = *++fmt; + width = prec = 0; + fillch = ' '; + if (c == '0') { + fillch = '0'; + c = *++fmt; + } + if (c == '*') { + width = va_arg(args, int); + c = *++fmt; + } else { + while (isdigit(c)) { + width = width * 10 + c - '0'; + c = *++fmt; + } + } + if (c == '.') { + c = *++fmt; + if (c == '*') { + prec = va_arg(args, int); + c = *++fmt; + } else { + while (isdigit(c)) { + prec = prec * 10 + c - '0'; + c = *++fmt; + } + } + } + str = 0; + base = 0; + neg = 0; + ++fmt; + switch (c) { + case 'd': + i = va_arg(args, int); + if (i < 0) { + neg = 1; + val = -i; + } else + val = i; + base = 10; + break; + case 'o': + val = va_arg(args, unsigned int); + base = 8; + break; + case 'x': + val = va_arg(args, unsigned int); + base = 16; + break; + case 'p': + val = (unsigned long) va_arg(args, void *); + base = 16; + neg = 2; + break; + case 's': + str = va_arg(args, char *); + break; + case 'c': + num[0] = va_arg(args, int); + num[1] = 0; + str = num; + break; + case 'm': + str = strerror(errno); + break; + case 'I': + str = ip_ntoa(va_arg(args, u_int32_t)); + break; + case 'r': + f = va_arg(args, char *); + #ifndef __powerpc__ + n = vfmtmsg(buf, buflen + 1, f, va_arg(args, va_list)); + #else + + n = vfmtmsg(buf, buflen + 1, f, va_arg(args, void *)); + #endif + buf += n; + buflen -= n; + continue; + case 't': + break; + case 'v': + case 'q': + quoted = c == 'q'; + p = va_arg(args, unsigned char *); + if (fillch == '0' && prec > 0) { + n = prec; + } else { + n = strlen((char *)p); + if (prec > 0 && prec < n) + n = prec; + } + while (n > 0 && buflen > 0) { + c = *p++; + --n; + if (!quoted && c >= 0x80) { + OUTCHAR('M'); + OUTCHAR('-'); + c -= 0x80; + } + if (quoted && (c == '"' || c == '\\')) + OUTCHAR('\\'); + if (c < 0x20 || (0x7f <= c && c < 0xa0)) { + if (quoted) { + OUTCHAR('\\'); + switch (c) { + case '\t': OUTCHAR('t'); break; + case '\n': OUTCHAR('n'); break; + case '\b': OUTCHAR('b'); break; + case '\f': OUTCHAR('f'); break; + default: + OUTCHAR('x'); + OUTCHAR(hexchars[c >> 4]); + OUTCHAR(hexchars[c & 0xf]); + } + } else { + if (c == '\t') + OUTCHAR(c); + else { + OUTCHAR('^'); + OUTCHAR(c ^ 0x40); + } + } + } else + OUTCHAR(c); + } + continue; + default: + *buf++ = '%'; + if (c != '%') + --fmt; + --buflen; + continue; + } + if (base != 0) { + str = num + sizeof(num); + *--str = 0; + while (str > num + neg) { + *--str = hexchars[val % base]; + val = val / base; + if (--prec <= 0 && val == 0) + break; + } + switch (neg) { + case 1: + *--str = '-'; + break; + case 2: + *--str = 'x'; + *--str = '0'; + break; + } + len = num + sizeof(num) - 1 - str; + } else { + len = strlen(str); + if (prec > 0 && len > prec) + len = prec; + } + if (width > 0) { + if (width > buflen) + width = buflen; + if ((n = width - len) > 0) { + buflen -= n; + for (; n > 0; --n) + *buf++ = fillch; + } + } + if (len > buflen) + len = buflen; + memcpy(buf, str, len); + buf += len; + buflen -= len; + } + *buf = 0; + return buf - buf0; + */ + return 0; +} + + +/* + * script_setenv - set an environment variable value to be used + * for scripts that we run (e.g. ip-up, auth-up, etc.) + */ +#define script_setenv(var, value) +/* + void + script_setenv(var, value) + char *var, *value; + { + int vl = strlen(var); + int i; + char *p, *newstring; + + newstring = (char *) malloc(vl + strlen(value) + 2); + if (newstring == 0) + return; + strcpy(newstring, var); + newstring[vl] = '='; + strcpy(newstring+vl+1, value); + + if (script_env != 0) { + for (i = 0; (p = script_env[i]) != 0; ++i) { + if (strncmp(p, var, vl) == 0 && p[vl] == '=') { + free(p); + script_env[i] = newstring; + return; + } + } + } else { + i = 0; + script_env = (char **) malloc(16 * sizeof(char *)); + if (script_env == 0) + return; + s_env_nalloc = 16; + } + + if (i + 1 >= s_env_nalloc) { + int new_n = i + 17; + char **newenv = (char **) realloc((void *)script_env, + new_n * sizeof(char *)); + if (newenv == 0) + return; + script_env = newenv; + s_env_nalloc = new_n; + } + + script_env[i] = newstring; + script_env[i+1] = 0; + } + + *//* + * script_unsetenv - remove a variable from the environment + * for scripts. + */ +#define script_unsetenv(var) +/* + void + script_unsetenv(var) + char *var; + { + int vl = strlen(var); + int i; + char *p; + + if (script_env == 0) + return; + for (i = 0; (p = script_env[i]) != 0; ++i) { + if (strncmp(p, var, vl) == 0 && p[vl] == '=') { + free(p); + while ((script_env[i] = script_env[i+1]) != 0) + ++i; + break; + } + } + } + */ diff --git a/cpukit/libnetworking/net/if_pppvar.h b/cpukit/libnetworking/net/if_pppvar.h new file mode 100644 index 0000000000..6eb45a6afb --- /dev/null +++ b/cpukit/libnetworking/net/if_pppvar.h @@ -0,0 +1,111 @@ +/* $Id$ */ +/* + * if_pppvar.h - private structures and declarations for PPP. + * + * Copyright (c) 1994 The Australian National University. + * All rights reserved. + * + * Permission to use, copy, modify, and distribute this software and its + * documentation is hereby granted, provided that the above copyright + * notice appears in all copies. This software is provided without any + * warranty, express or implied. The Australian National University + * makes no representations about the suitability of this software for + * any purpose. + * + * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY + * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF + * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO + * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, + * OR MODIFICATIONS. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +/* + * Supported network protocols. These values are used for + * indexing sc_npmode. + */ +#define NP_IP 0 /* Internet Protocol */ +#define NUM_NP 1 /* Number of NPs. */ + +/* + * Structure describing each ppp unit. + */ +struct ppp_softc { + struct ifnet sc_if; /* network-visible interface */ + u_int sc_flags; /* control/status bits; see if_ppp.h */ + void *sc_devp; /* pointer to device-dep structure */ + void (*sc_start) __P((struct ppp_softc *)); /* start output proc */ + void (*sc_ctlp) __P((struct ppp_softc *)); /* rcvd control pkt */ + void (*sc_relinq) __P((struct ppp_softc *)); /* relinquish ifunit */ + short sc_mru; /* max receive unit */ + pid_t sc_xfer; /* used in transferring unit */ + struct ifqueue sc_rawq; /* received packets */ + struct ifqueue sc_inq; /* queue of input packets for daemon */ + struct ifqueue sc_fastq; /* interactive output packet q */ + struct mbuf *sc_togo; /* output packet ready to go */ + struct mbuf *sc_npqueue; /* output packets not to be sent yet */ + struct mbuf **sc_npqtail; /* ptr to last next ptr in npqueue */ + struct pppstat sc_stats; /* count of bytes/pkts sent/rcvd */ + caddr_t sc_bpf; /* hook for BPF */ + enum NPmode sc_npmode[NUM_NP]; /* what to do with each NP */ + struct compressor *sc_xcomp; /* transmit compressor */ + void *sc_xc_state; /* transmit compressor state */ + struct compressor *sc_rcomp; /* receive decompressor */ + void *sc_rc_state; /* receive decompressor state */ + time_t sc_last_sent; /* time (secs) last NP pkt sent */ + time_t sc_last_recv; /* time (secs) last NP pkt rcvd */ +#ifdef PPP_FILTER + struct bpf_program sc_pass_filt; /* filter for packets to pass */ + struct bpf_program sc_active_filt; /* filter for "non-idle" packets */ +#endif /* PPP_FILTER */ +#ifdef VJC + struct vjcompress *sc_comp; /* vjc control buffer */ +#endif + + /* Device-dependent part for async lines. */ + ext_accm sc_asyncmap; /* async control character map */ + u_long sc_rasyncmap; /* receive async control char map */ + struct mbuf *sc_outm; /* mbuf chain currently being output */ + struct mbuf *sc_m; /* pointer to input mbuf chain */ + struct mbuf *sc_mc; /* pointer to current input mbuf */ + char *sc_mp; /* ptr to next char in input mbuf */ + short sc_ilen; /* length of input packet so far */ + u_short sc_fcs; /* FCS so far (input) */ + u_short sc_outfcs; /* FCS so far for output packet */ + u_char sc_rawin[16]; /* chars as received */ + int sc_rawin_count; /* # in sc_rawin */ + rtems_id sem_id; /* ID of comm semaphore */ +}; + +struct ppp_softc ppp_softc[NPPP]; + +struct ppp_softc *pppalloc __P((pid_t pid)); +void pppdealloc __P((struct ppp_softc *sc)); +int pppoutput __P((struct ifnet *, struct mbuf *, + struct sockaddr *, struct rtentry *)); +int pppioctl __P((struct ppp_softc *sc, int cmd, caddr_t data, + int flag, struct proc *p)); +void ppp_restart __P((struct ppp_softc *sc)); +void ppppktin __P((struct ppp_softc *sc, struct mbuf *m, int lost)); +struct mbuf *ppp_dequeue __P((struct ppp_softc *sc)); diff --git a/cpukit/libnetworking/net/pppcompress.h b/cpukit/libnetworking/net/pppcompress.h new file mode 100644 index 0000000000..3f7687e6bb --- /dev/null +++ b/cpukit/libnetworking/net/pppcompress.h @@ -0,0 +1,164 @@ +/* + * Definitions for tcp compression routines. + * + * Copyright (c) 1989 Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * Van Jacobson (van@helios.ee.lbl.gov), Dec 31, 1989: + * - Initial distribution. + * + * From: slcompress.h 7.4 90/06/28 + * $Id$ + */ + +#ifndef _NET_PPPCOMPRESS_H_ +#define _NET_PPPCOMPRESS_H_ + +#define MAX_STATES 16 /* must be > 2 and < 256 */ +#define MAX_HDR MLEN /* XXX 4bsd-ism: should really be 128 */ + +/* + * Compressed packet format: + * + * The first octet contains the packet type (top 3 bits), TCP + * 'push' bit, and flags that indicate which of the 4 TCP sequence + * numbers have changed (bottom 5 bits). The next octet is a + * conversation number that associates a saved IP/TCP header with + * the compressed packet. The next two octets are the TCP checksum + * from the original datagram. The next 0 to 15 octets are + * sequence number changes, one change per bit set in the header + * (there may be no changes and there are two special cases where + * the receiver implicitly knows what changed -- see below). + * + * There are 5 numbers which can change (they are always inserted + * in the following order): TCP urgent pointer, window, + * acknowlegement, sequence number and IP ID. (The urgent pointer + * is different from the others in that its value is sent, not the + * change in value.) Since typical use of SLIP links is biased + * toward small packets (see comments on MTU/MSS below), changes + * use a variable length coding with one octet for numbers in the + * range 1 - 255 and 3 octets (0, MSB, LSB) for numbers in the + * range 256 - 65535 or 0. (If the change in sequence number or + * ack is more than 65535, an uncompressed packet is sent.) + */ + +/* + * Packet types (must not conflict with IP protocol version) + * + * The top nibble of the first octet is the packet type. There are + * three possible types: IP (not proto TCP or tcp with one of the + * control flags set); uncompressed TCP (a normal IP/TCP packet but + * with the 8-bit protocol field replaced by an 8-bit connection id -- + * this type of packet syncs the sender & receiver); and compressed + * TCP (described above). + * + * LSB of 4-bit field is TCP "PUSH" bit (a worthless anachronism) and + * is logically part of the 4-bit "changes" field that follows. Top + * three bits are actual packet type. For backward compatibility + * and in the interest of conserving bits, numbers are chosen so the + * IP protocol version number (4) which normally appears in this nibble + * means "IP packet". + */ + +/* packet types */ +#define TYPE_IP 0x40 +#define TYPE_UNCOMPRESSED_TCP 0x70 +#define TYPE_COMPRESSED_TCP 0x80 +#define TYPE_ERROR 0x00 + +/* Bits in first octet of compressed packet */ +#define NEW_C 0x40 /* flag bits for what changed in a packet */ +#define NEW_I 0x20 +#define NEW_S 0x08 +#define NEW_A 0x04 +#define NEW_W 0x02 +#define NEW_U 0x01 + +/* reserved, special-case values of above */ +#define SPECIAL_I (NEW_S|NEW_W|NEW_U) /* echoed interactive traffic */ +#define SPECIAL_D (NEW_S|NEW_A|NEW_W|NEW_U) /* unidirectional data */ +#define SPECIALS_MASK (NEW_S|NEW_A|NEW_W|NEW_U) + +#define TCP_PUSH_BIT 0x10 + + +/* + * "state" data for each active tcp conversation on the wire. This is + * basically a copy of the entire IP/TCP header from the last packet + * we saw from the conversation together with a small identifier + * the transmit & receive ends of the line use to locate saved header. + */ +struct cstate { + struct cstate *cs_next; /* next most recently used cstate (xmit only) */ + u_short cs_hlen; /* size of hdr (receive only) */ + u_char cs_id; /* connection # associated with this state */ + u_char cs_filler; + union { + char csu_hdr[MAX_HDR]; + struct ip csu_ip; /* ip/tcp hdr from most recent packet */ + } slcs_u; +}; +#define cs_ip slcs_u.csu_ip +#define cs_hdr slcs_u.csu_hdr + +/* + * all the state data for one serial line (we need one of these + * per line). + */ +struct vjcompress { + struct cstate *last_cs; /* most recently used tstate */ + u_char last_recv; /* last rcvd conn. id */ + u_char last_xmit; /* last sent conn. id */ + u_short flags; +#ifndef SL_NO_STATS + int sls_packets; /* outbound packets */ + int sls_compressed; /* outbound compressed packets */ + int sls_searches; /* searches for connection state */ + int sls_misses; /* times couldn't find conn. state */ + int sls_uncompressedin; /* inbound uncompressed packets */ + int sls_compressedin; /* inbound compressed packets */ + int sls_errorin; /* inbound unknown type packets */ + int sls_tossed; /* inbound packets tossed because of error */ +#endif + struct cstate tstate[MAX_STATES]; /* xmit connection states */ + struct cstate rstate[MAX_STATES]; /* receive connection states */ +}; +/* flag values */ +#define SLF_TOSS 1 /* tossing rcvd frames because of input err */ + +void vj_compress_init __P((struct vjcompress *, int)); +u_int vj_compress_tcp __P((struct mbuf *, + struct ip *, struct vjcompress *, int)); +int vj_uncompress_tcp __P((u_char **, int, u_int, struct vjcompress *)); +int vj_uncompress_tcp_core __P((u_char *, int, int, u_int, + struct vjcompress *, u_char **, u_int *)); + +#endif /* _NET_PPPCOMPRESS_H_ */ -- cgit v1.2.3