diff options
author | Vijay Kumar Banerjee <vijay@rtems.org> | 2021-02-24 19:06:38 -0700 |
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committer | Vijay Kumar Banerjee <vijay@rtems.org> | 2021-04-07 16:15:38 -0600 |
commit | 2a13ad389af61429a184e1cfac53c69eb673ad76 (patch) | |
tree | 035aca3f29ec996074a55d22b028f29c1d0cc4ea /cpukit/libnetworking/net/ppp_tty.c | |
parent | cpukit: Move ftpfs from libnetworking to libfs (diff) | |
download | rtems-2a13ad389af61429a184e1cfac53c69eb673ad76.tar.bz2 |
cpukit: Remove libnetworking
Update #3850
Diffstat (limited to '')
-rw-r--r-- | cpukit/libnetworking/net/ppp_tty.c | 957 |
1 files changed, 0 insertions, 957 deletions
diff --git a/cpukit/libnetworking/net/ppp_tty.c b/cpukit/libnetworking/net/ppp_tty.c deleted file mode 100644 index 705c2c148c..0000000000 --- a/cpukit/libnetworking/net/ppp_tty.c +++ /dev/null @@ -1,957 +0,0 @@ -#include <machine/rtems-bsd-kernel-space.h> - -/* - * 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). - */ - -/* $FreeBSD: src/sys/net/ppp_tty.c,v 1.69 2005/10/16 20:44:18 phk Exp $ */ -/* 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 */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include "opt_ppp.h" /* XXX for ppp_defs.h */ - -#if NPPP > 0 - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/proc.h> -#include <sys/mbuf.h> -#include <sys/socket.h> -#include <sys/filio.h> -#include <sys/file.h> -#include <sys/kernel.h> - -#include <net/if.h> -#include <net/if_types.h> - -#ifdef VJC -#include <netinet/in.h> -#include <netinet/in_systm.h> -#include <netinet/ip.h> -#include <net/slcompress.h> -#endif - -#include <rtems.h> -#include <rtems/libio.h> -#include <sys/ttycom.h> -#include <termios.h> -#include <rtems/termiostypes.h> - -#ifdef PPP_FILTER -#include <net/bpf.h> -#endif -#include <net/ppp_defs.h> -#include <net/if_ppp.h> -#include <net/if_pppvar.h> - - -void pppasyncattach(void); -int pppopen(struct rtems_termios_tty *tty); -int pppclose(struct rtems_termios_tty *tty); -int pppread(struct rtems_termios_tty *tty, rtems_libio_rw_args_t *rw_args); -int pppwrite(struct rtems_termios_tty *tty, rtems_libio_rw_args_t *rw_args); -int ppptioctl(struct rtems_termios_tty *tty, rtems_libio_ioctl_args_t *args); -int pppinput(int c, struct rtems_termios_tty *tty); -int pppstart(struct rtems_termios_tty *tp); -u_short pppfcs(u_short fcs, u_char *cp, int len); -void pppallocmbuf(struct ppp_softc *sc, struct mbuf **mp); - -static void pppasyncstart(struct ppp_softc *); -static void pppasyncctlp(struct ppp_softc *); -static void pppasyncrelinq(struct ppp_softc *); -/*static void ppp_timeout __P((void *)); */ -/*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) - -/* - * 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 */ - -/* - * 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. - */ - -/* This is a FreeBSD-2.0 kernel. */ -#define CCOUNT(rb) (((rb).Size+(rb).Head-(rb).Tail) % (rb).Size) -#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 */ - -/* - * Define the PPP line discipline. - */ - -static struct rtems_termios_linesw pppdisc = { - pppopen, pppclose, pppread, pppwrite, - pppinput, pppstart, ppptioctl, NULL -}; - -void -pppasyncattach(void) -{ - rtems_termios_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 */ -int -pppopen(struct rtems_termios_tty *tty) -{ - int i; - register struct ppp_softc *sc; - struct mbuf *m = (struct mbuf *)0; - - if (tty->t_line == PPPDISC) { - sc = (struct ppp_softc *)tty->t_sc; - if (sc != NULL && sc->sc_devp == (void *)tty) { - return (0); - } - } - - if ((sc = pppalloc(1)) == NULL) { - return ENXIO; - } - - if (sc->sc_relinq) - (*sc->sc_relinq)(sc); /* get previous owner to relinquish the unit */ - - 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; - sc->sc_outmc = NULL; - - /* preallocate mbufs for free queue */ - rtems_bsdnet_semaphore_obtain(); - for (i=0; i<NUM_MBUFQ; i++) { - pppallocmbuf(sc, &m); - if ( i == 0 ) { - /* use first mbuf for rx iterrupt handling */ - sc->sc_m = m; - } - else { - /* enqueue mbuf for later use */ - IF_ENQUEUE(&sc->sc_freeq, m); - } - m = (struct mbuf *)0; - } - rtems_bsdnet_semaphore_release(); - - /* initialize values */ - sc->sc_if.if_flags |= IFF_RUNNING; - sc->sc_if.if_baudrate = tty->termios.c_ispeed; - - 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; - - tty->t_line = 0; - sc = (struct ppp_softc *)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); - pppdealloc(sc); - rtems_bsdnet_semaphore_release(); - } - } - return ( RTEMS_SUCCESSFUL ); -} - -/* - * Relinquish the interface unit to another device. - */ -static void -pppasyncrelinq(struct ppp_softc *sc) -{ -#ifdef XXX_XXX - 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; - } -#endif -} - -/* - * Line specific (tty) read routine. - */ -int -pppread(struct rtems_termios_tty *tty, rtems_libio_rw_args_t *rw_args) -{ - rtems_status_code status = RTEMS_UNSATISFIED; - int count = 0; - int maximum = rw_args->count; - char *buffer = rw_args->buffer; - register struct ppp_softc *sc = (struct ppp_softc *)tty->t_sc; - struct mbuf *m; - struct mbuf *m0; - u_char *p; - - if (sc == NULL) - return 0; - - /* - * Loop waiting for input, checking that nothing disasterous - * happens in the meantime. - */ - if (tty != (struct rtems_termios_tty *)sc->sc_devp || tty->t_line != PPPDISC) { - return ( status ); - } - if (sc->sc_inq.ifq_head == NULL) { - return ( status ); - } - - /* Get the packet from the input queue */ - rtems_bsdnet_semaphore_obtain(); - IF_DEQUEUE(&sc->sc_inq, m0); - - /* loop over mbuf chain */ - m = m0; - while (( m != NULL ) && ( m->m_len > 0 ) && ( count+m->m_len < maximum )) { - /* copy data into buffer */ - p = mtod(m, u_char *); - memcpy(buffer, p, m->m_len); - memset(p, 0, m->m_len); - count += m->m_len; - buffer += m->m_len; - - /* increment loop index */ - m = m->m_next; - } - - /* free mbuf chain */ - m_freem(m0); - rtems_bsdnet_semaphore_release(); - - /* update return values */ - rw_args->bytes_moved = count; - if ( count >= 0 ) { - status = RTEMS_SUCCESSFUL; - } - - /* check to see if queue is empty */ - if (sc->sc_inq.ifq_head != NULL) { - /* queue is not empty - post another event to ourself */ - rtems_event_send(sc->sc_pppdtask, PPPD_EVENT); - } - - return ( status ); -} - -/* - * Line specific (tty) write routine. - */ -int -pppwrite(struct rtems_termios_tty *tty, rtems_libio_rw_args_t *rw_args) -{ - struct sockaddr dst; - int n; - int len; - int maximum = rw_args->count; - char *out_buffer = rw_args->buffer; - register struct ppp_softc *sc = (struct ppp_softc *)tty->t_sc; - struct mbuf *m; - struct mbuf *m0; - struct mbuf **mp; - - rtems_bsdnet_semaphore_obtain(); - for (mp = &m0; maximum; mp = &m->m_next) { - MGET(m, M_WAIT, MT_DATA); - if ((*mp = m) == NULL) { - 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); - m->m_len = len; - maximum -= 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) -{ -/* int i; */ - int error = RTEMS_SUCCESSFUL; - ioctl_command_t cmd = args->command; - caddr_t data = args->buffer; - struct ppp_softc *sc = tty->t_sc; - - switch (cmd) { - case TIOCGETA: - case TIOCSETA: - case TIOCSETAW: - case TIOCSETAF: - case TIOCDRAIN: - case RTEMS_IO_SNDWAKEUP: - case RTEMS_IO_RCVWAKEUP: - case TIOCGETD: - case TIOCSETD: - error = rtems_termios_ioctl(args); - 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 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); - 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. - */ -u_short -pppfcs(u_short fcs, u_char *cp, 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. - */ -void pppasyncstart(struct ppp_softc *sc) -{ - /* check to see if output is not active */ - if ( sc->sc_outflag == 0 ) { - /* mark active and post tx event to daemon */ - sc->sc_outflag |= SC_TX_PENDING; - rtems_event_send(sc->sc_txtask, TX_PACKET); - } -} - -/* - * This gets called when a received packet is placed on - * the inq, at splsoftnet. - */ -static void -pppasyncctlp( - struct ppp_softc *sc) -{ - /* check to see if task id was set */ - if ( sc->sc_pppdtask != 0 ) { - /* post event to daemon */ - rtems_event_send(sc->sc_pppdtask, PPPD_EVENT); - } -} - -/* - * Start output on async tty interface. If the transmit queue - * has drained sufficiently, arrange for pppasyncstart to be - * called later at splsoftnet. - * Called at spltty or higher. - */ -int -pppstart(struct rtems_termios_tty *tp) -{ - u_char *sendBegin; - u_long ioffset = (u_long )0; - struct mbuf *m = (struct mbuf *)0; - struct ppp_softc *sc = tp->t_sc; - rtems_termios_device_context *ctx = rtems_termios_get_device_context(tp); - - /* ensure input is valid and we are busy */ - if (( sc != NULL ) && ( sc->sc_outflag & SC_TX_BUSY )) { - /* check to see if we need to get the next buffer */ - - /* Ready with PPP_FLAG Character ? */ - if(sc->sc_outflag & SC_TX_LASTCHAR){ - sc->sc_outflag &= ~(SC_TX_BUSY | SC_TX_FCS | SC_TX_LASTCHAR); - - /* Notify driver that we have nothing to transmit */ - (*tp->handler.write)(ctx, NULL, 0); - - rtems_event_send(sc->sc_txtask, TX_TRANSMIT); /* Ready for the next Packet */ - return(0); - } - - if ( sc->sc_outoff >= sc->sc_outlen ) { - /* loop to get next non-zero length buffer */ - if ( sc->sc_outmc != NULL ) { - m = sc->sc_outmc->m_next; - } - - /* check for next mbuf in chain */ - if ( m != NULL ) { - /* update values to use this mbuf */ - sc->sc_outmc = m; - sc->sc_outbuf = mtod(m, u_char *); - sc->sc_outlen = m->m_len; - sc->sc_outoff = (short)0; - } - else if ( (sc->sc_outflag & SC_TX_FCS) == 0 ) { - /* setup to use FCS buffer */ - sc->sc_outflag |= SC_TX_FCS; - sc->sc_outbuf = sc->sc_outfcsbuf; - sc->sc_outlen = sc->sc_outfcslen; - sc->sc_outoff = (short)0; - } - else { - /* done with this packet */ - sc->sc_outflag |= SC_TX_LASTCHAR; - sc->sc_outflag &=~(SC_TX_FCS); - sc->sc_outchar = (u_char)PPP_FLAG; - (*tp->handler.write)(ctx, (char *)&sc->sc_outchar, 1); - return(0); - } - } - - /* check to see if there is some data to write out */ - if ( sc->sc_outoff < sc->sc_outlen ) { - /* check to see if character needs to be escaped */ - sc->sc_outchar = sc->sc_outbuf[sc->sc_outoff]; - if ( ESCAPE_P(sc->sc_outchar) ) { - if ( sc->sc_outflag & SC_TX_ESCAPE ) { - /* last sent character was the escape character */ - sc->sc_outchar = sc->sc_outchar ^ PPP_TRANS; - - /* clear the escape flag and increment the offset */ - sc->sc_outflag &= ~SC_TX_ESCAPE; - ioffset++; - } - else { - /* need to send the escape character */ - sc->sc_outchar = PPP_ESCAPE; - - /* set the escape flag */ - sc->sc_outflag |= SC_TX_ESCAPE; - } - sendBegin = &sc->sc_outchar; - } - else { - /* escape not needed - increment the offset as much as possible */ - while ((!ESCAPE_P(sc->sc_outchar)) && ((sc->sc_outoff + ioffset) < sc->sc_outlen)) { - ioffset++; - sc->sc_outchar = sc->sc_outbuf[sc->sc_outoff + ioffset]; - } - sendBegin = &sc->sc_outbuf[sc->sc_outoff]; - } - - /* write out the character(s) and update the stats */ - (*tp->handler.write)(ctx, (char *)sendBegin, (ioffset > 0) ? ioffset : 1); - sc->sc_stats.ppp_obytes += (ioffset > 0) ? ioffset : 1; - sc->sc_outoff += ioffset; - - return (0); - } - } - - /* Notify driver that we have nothing to transmit */ - (*tp->handler.write)(ctx, NULL, 0); - - return (0); -} - -#ifdef XXX_XXX -/* - * Timeout routine - try to start some more output. - */ -static void -ppp_timeout(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; */ - - sc->sc_flags &= ~SC_TIMEOUT; -/* pppstart(tp); */ -} -#endif - -/* - * Allocate enough mbuf to handle current MRU. - */ -#ifdef XXX_XXX -static void -pppgetm(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; - } -} -#endif - -void -pppallocmbuf(struct ppp_softc *sc, struct mbuf **mp) -{ - int ilen; - struct mbuf *m; - - /* loop over length value */ - ilen = sc->sc_mru + PPP_HDRLEN + PPP_FCSLEN; - while ( ilen > 0 ) { - /* see if this is end of the chain */ - m = *mp; - if ( m == NULL ) { - /* get mbuf header */ - MGETHDR(m, M_WAIT, MT_DATA); - MCLGET(m, M_WAIT); - *mp = m; - } - - /* update loop variables */ - mp = &m->m_next; - ilen -= M_DATASIZE(m); - } -} - -/* - * tty interface receiver interrupt. - */ -static uint32_t paritytab[8] = { - 0x96696996L, 0x69969669L, 0x69969669L, 0x96696996L, - 0x69969669L, 0x96696996L, 0x96696996L, 0x69969669L -}; - -int -pppinput(int c, struct rtems_termios_tty *tp) -{ - register struct ppp_softc *sc = tp->t_sc; - struct mbuf *m; - int ilen; - - if (sc == NULL || tp != (struct rtems_termios_tty *)sc->sc_devp) - return 0; - if (sc->sc_m == NULL) { - rtems_event_send(sc->sc_rxtask, RX_EMPTY); - IF_DEQUEUE(&sc->sc_freeq, sc->sc_m); - if ( sc->sc_m == NULL ) { - return 0; - } - } - - ++sc->sc_stats.ppp_ibytes; - - c &= 0xff; - 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 (c == PPP_FLAG) { - ilen = sc->sc_ilen; - sc->sc_ilen = 0; - - /* - * 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){ - /* bad fcs error */ - 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) { - /* too short error */ - sc->sc_if.if_ierrors++; - sc->sc_stats.ppp_ierrors++; - sc->sc_flags |= SC_PKTLOST; - } - 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 - place on raw queue */ - m = sc->sc_m; - if ( sc->sc_flags & SC_PKTLOST ) { - m->m_flags |= M_ERRMARK; - sc->sc_flags &= ~SC_PKTLOST; - } - IF_ENQUEUE(&sc->sc_rawq, m); - - /* setup next mbuf chain */ - IF_DEQUEUE(&sc->sc_freeq, sc->sc_m); - - /* send rx packet event */ - rtems_event_send(sc->sc_rxtask, RX_PACKET); - 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) { - 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) { - /* garbage received error */ - 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) { - /* missing UI error */ - 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) { - /* bad protocol error */ - goto flush; - } - - /* packet beyond configured mru? */ - if (++sc->sc_ilen > sc->sc_mru + PPP_HDRLEN + PPP_FCSLEN) { - /* packet too big error */ - goto flush; - } - - /* is this mbuf full? */ - m = sc->sc_mc; - if (M_TRAILINGSPACE(m) <= 0) { - if (m->m_next == NULL) { - /* get next available mbuf for the chain */ - IF_DEQUEUE(&sc->sc_freeq, m->m_next); - if (m->m_next == NULL) { - /* too few mbufs */ - goto flush; - } - else { - /* send rx mbuf event */ - rtems_event_send(sc->sc_rxtask, RX_MBUF); - } - } - sc->sc_mc = m = m->m_next; - m->m_len = 0; - m->m_next = 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; - } - return 0; -} - -#ifdef XXX_XXX -#define MAX_DUMP_BYTES 128 - -static void -ppplogchar(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(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 - -#endif /* NPPP > 0 */ |