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authorJoel Sherrill <joel.sherrill@OARcorp.com>2001-10-12 13:43:05 +0000
committerJoel Sherrill <joel.sherrill@OARcorp.com>2001-10-12 13:43:05 +0000
commitaee474b0cf18922c8b21ca56aae4067835c6a860 (patch)
tree47e06016a77cfa961e90b3255fbfcda9a8837f58 /c/src/libnetworking/pppd/modem_example
parent2001-10-11 Alexandra Kossovsky <sasha@oktet.ru> (diff)
downloadrtems-aee474b0cf18922c8b21ca56aae4067835c6a860.tar.bz2
2001-10-12 Mike Siers <mikes@poliac.com>
* Update to stable working state. Congratulations Mike! :) * modem_example: Directory removed. * modem_example/16550.h, modem_example/README, modem_example/modem.c, modem_example/modem.h, modem_example/ppp.c, modem_example/ppp.h, modem_example/pppcompress.c: Files removed. * pppd/example/pppd.options: New file. * pppd/README, pppd/STATUS, pppd/cbcp.c, pppd/cbcp.h, pppd/chat.c, pppd/pppd.h, pppd/rtemsmain.c: Updated.
Diffstat (limited to 'c/src/libnetworking/pppd/modem_example')
-rw-r--r--c/src/libnetworking/pppd/modem_example/16550.h110
-rw-r--r--c/src/libnetworking/pppd/modem_example/README7
-rw-r--r--c/src/libnetworking/pppd/modem_example/modem.c1438
-rw-r--r--c/src/libnetworking/pppd/modem_example/modem.h45
-rw-r--r--c/src/libnetworking/pppd/modem_example/ppp.c1504
-rw-r--r--c/src/libnetworking/pppd/modem_example/ppp.h7
-rw-r--r--c/src/libnetworking/pppd/modem_example/pppcompress.c593
7 files changed, 0 insertions, 3704 deletions
diff --git a/c/src/libnetworking/pppd/modem_example/16550.h b/c/src/libnetworking/pppd/modem_example/16550.h
deleted file mode 100644
index cba98d69f2..0000000000
--- a/c/src/libnetworking/pppd/modem_example/16550.h
+++ /dev/null
@@ -1,110 +0,0 @@
-/*
- *-------------------------------------------------------------------
- *
- * 16550 -- header file for National Semiconducor's 16550 UART
- *
- * This file has been created by John S. Gwynne for the efi68k
- * project.
- *
- * The license and distribution terms for this file may in
- * the file LICENSE in this distribution or at
- * http://www.OARcorp.com/rtems/license.html.
- *
- *------------------------------------------------------------------
- *
- * $Id$
- */
-
-#ifndef _16550_H_
-#define _16550_H_
-
-/* base address is the physical location of register 0 */
-#define UART_BASE_ADDRESS 0xF0000000
-
-/* definitions of register addresses and associate bits */
-
-#define RBR (volatile unsigned char * const)(0+UART_BASE_ADDRESS)
- /* Receiver Buffer Register (w/DLAB=0)*/
- /* 8-bit data */
-
-#define THR (volatile unsigned char * const)(0+UART_BASE_ADDRESS)
- /* Transmitter Holding Register (w/DLAB=0) */
- /* 8-bit data */
-
-#define DLL (volatile unsigned char * const)(0+UART_BASE_ADDRESS)
- /* Divisor Latch (LS) (w/DLAB=1) */
- /* LSB of Divisor */
-
-#define DLM (volatile unsigned char * const)(1+UART_BASE_ADDRESS)
- /* Divisor Latch (MS) (w/DLAB=1) */
- /* MSB of Divisor */
-
-#define IER (volatile unsigned char * const)(1+UART_BASE_ADDRESS)
- /* Interrupt Enable Register (w/DLAB=0) */
-#define ERBFI 0x01 /* Enable Recv Data Available Interrupt */
-#define ETBEI 0x02 /* Enable Trans Holding Reg Empty Inter */
-#define ELSI 0x04 /* Enable Recv Line Status Interrupt */
-#define EDSSI 0x08 /* Enable Modem Status Interrupt */
-
-#define IIR (volatile unsigned char * const)(2+UART_BASE_ADDRESS)
- /* Interrupt Ident Register (read only) */
-#define NIP 0x01 /* No Interrupt Pending */
-#define IID_MASK 0x0e /* Interrupt ID mask */
-#define FE_MASK 0xc0 /* FIFO's Enabled */
-
-#define FCR (volatile unsigned char * const)(2+UART_BASE_ADDRESS)
- /* FIFO Control Register (write only) */
-#define FIFO_E 0x01 /* FIFO Enable */
-#define RFR 0x02 /* RCVR FIFO Reset */
-#define XFR 0x04 /* XMIT FIFO Reset */
-#define DMAMS 0x08 /* DMA Mode Select */
-#define RCVRTG_MASK 0xC0 /* RCVR Triger MSBit/LSBit */
-
-#define LCR (volatile unsigned char * const)(3+UART_BASE_ADDRESS)
- /* Line Control Register */
-#define WLS_MASK 0x03 /* Word Legth Select Mask */
-#define WL_5 0x00 /* 5 bits */
-#define WL_6 0x01 /* 6 bits */
-#define WL_7 0x02 /* 7 bits */
-#define WL_8 0x03 /* 8 bits */
-#define NSB 0x04 /* Number of Stop Bits (set is 2/1.5) */
-#define PEN 0x08 /* Parity Enable */
-#define EPS 0x10 /* Even Parity Select */
-#define STP 0x20 /* Stick Parity */
-#define SETBK 0x40 /* Set Break */
-#define DLAB 0x80 /* Divisor Latch Access Bit */
-
-#define MCR (volatile unsigned char * const)(4+UART_BASE_ADDRESS)
- /* Modem Control Register */
-#define DTR 0x01 /* Data Terminal Ready */
-#define RTS 0x02 /* Request to Send */
-#define OUT1 0x04 /* Out 1 */
-#define OUT2 0x08 /* Out 2 */
-#define LOOP 0x10 /* Loop */
-
-#define LSR (volatile unsigned char * const)(5+UART_BASE_ADDRESS)
- /* Line Status Register */
-#define DR 0x01 /* Data Ready */
-#define OE 0x02 /* Overrun error */
-#define PE 0x04 /* Parity error */
-#define FE 0x08 /* Framing error */
-#define BI 0x10 /* Break Interrupt */
-#define THRE 0x20 /* Transmitter Holding Register */
-#define TEMT 0x40 /* Transmitter Empty */
-#define RCVFIE 0x80 /* Recv FIFO Error */
-
-#define MDSR (volatile unsigned char * const)(6+UART_BASE_ADDRESS)
- /* Modem Status Register */
-#define DCTS 0x01 /* Delta Clear to Send */
-#define DDSR 0x02 /* Delta Data Set Ready */
-#define TERI 0x04 /* Trailing Edge Ring Indicator */
-#define DDCD 0x08 /* Delta Data Carrier Detect */
-#define CTS 0x10 /* Clear to Send */
-#define DSR 0x20 /* Data Set Ready */
-#define RI 0x40 /* Ring Indicator */
-#define DCD 0x80 /* Data Carrier Detect */
-
-#define SCR (volatile unsigned char * const)(7+UART_BASE_ADDRESS)
- /* Scratch Register */
- /* 8-bit register */
-#endif
diff --git a/c/src/libnetworking/pppd/modem_example/README b/c/src/libnetworking/pppd/modem_example/README
deleted file mode 100644
index c7eded9bfd..0000000000
--- a/c/src/libnetworking/pppd/modem_example/README
+++ /dev/null
@@ -1,7 +0,0 @@
-#
-# $Id$
-#
-
-This is a modem driver which should work with limited modifications
-on any 16550.
-
diff --git a/c/src/libnetworking/pppd/modem_example/modem.c b/c/src/libnetworking/pppd/modem_example/modem.c
deleted file mode 100644
index 119421e476..0000000000
--- a/c/src/libnetworking/pppd/modem_example/modem.c
+++ /dev/null
@@ -1,1438 +0,0 @@
-/*
- * Modem device driver for RTEMS
- * Author: Tomasz Domin (dot@comarch.pl)
- * Copyright (C) 1998 by ComArch SA
- * Driver will use termios for character output and ppp specific out procecedures for network protocols
- */
-
-#include <bsp.h>
-#include <rtems.h>
-#include <rtems/libio.h>
-#include <sys/ttycom.h>
-#include <unistd.h>
-#include <sys/errno.h>
-#include <rtems/rtems/event.h>
-#include <rtems/rtems/tasks.h>
-#include <mpc823.h>
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/proc.h>
-#include <sys/mbuf.h>
-#include <sys/socket.h>
-#include <sys/ioctl.h>
-#include <sys/file.h>
-
-#include <sys/kernel.h>
-#include <sys/conf.h>
-#include <net/if.h>
-#include <net/ppp_defs.h>
-#include <sys/fcntl.h>
-#include "ppp.h"
-#include <net/if_pppvar.h>
-#include <net/if_ppp.h>
-/* RTEMS specific */
-rtems_id modem_task_id;
-#include "16550.h"
-#include <mpc823.h>
-#define ESCAPE_P(c) (sc->sc_asyncmap[(c) >> 5] & (1 << ((c) & 0x1F)))
-#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)
-
-
-struct rtems_termios_tty *modem_tty;
-/*
- * RTEMS event used by interrupt handler to signal daemons.
- * This must *not* be the same event used by the KA9Q task synchronization.
- */
-#define INTERRUPT_EVENT RTEMS_EVENT_1
-#define START_TRANSMIT_EVENT RTEMS_EVENT_2
-#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 */
-
-/*
- * RTEMS event used to start transmit daemon.
- * This must not be the same as INTERRUPT_EVENT.
- */
-
-/*static struct modem_tty *tp=&modem_tp;*/
-static rtems_id modem_rx_task,modem_tx_task;
-
-
-
-/* internal FIFO buffers for input and output characters */
-#define MODEM_BUFFER_LENGTH 4096
-#define RTS_STOP_SIZE MODEM_BUFFER_LENGTH-128
-#define RTS_START_SIZE 16
-
-int xmt_start,xmt_len;
-int rcv_start,rcv_len;
-
-static unsigned char xmt_buf[MODEM_BUFFER_LENGTH];
-static unsigned char rcv_buf[MODEM_BUFFER_LENGTH];
-
-static volatile char _tx_stop = 0 ,_modem_cd=0;
-struct ModemData
-{
- int t_line;
- struct ppp_softc *t_sc;
- rtems_id pppsem;
- int offhook;
-} ModemData;
-
-int pppstart(struct tty *ignore);
-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
-};
-
-
-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);
-}
-
-static void
-ppp_timeout(x)
- void *x;
-{
- struct ppp_softc *sc = ModemData.t_sc;
- struct tty *tp = (struct tty *) sc->sc_devp;
- int s;
-
- sc->sc_flags &= ~SC_TIMEOUT;
- pppstart(tp);
-}
-
-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;
- }
-}
-
-/* Put data in input queue */
-int
-pppstart(struct tty *ignore)
-{
- register struct ppp_softc *sc = ModemData.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.
- */
- rtems_event_send(modem_tx_task,START_TRANSMIT_EVENT);
- 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->t_outq) < PPP_LOWAT
- && !((tp->t_state & TS_CARR_ON) == 0 && (tp->t_cflag & CLOCAL) == 0)
- && sc != NULL && tp == (struct tty *) sc->sc_devp) {
- ppp_restart(sc);
- }
-*/
- return 0;
-}
-int putc(unsigned char c)
-{
- int level;
-
- if (xmt_len<MODEM_BUFFER_LENGTH-1)
- {
- _CPU_ISR_Disable(level);
- xmt_buf[(xmt_start+xmt_len)%MODEM_BUFFER_LENGTH]=c;
- xmt_len++;
- _CPU_ISR_Enable(level);
- return 0;
- }
- return 1;
-}
-
-void unputc(void)
-{
- int level;
-
- if (xmt_len==0)
- return;
- _CPU_ISR_Disable(level);
- xmt_len--;
- _CPU_ISR_Enable(level);
-}
-
-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 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;
- register struct ppp_softc *sc=ModemData.t_sc;
-
-
- while (xmt_len < 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 (xmt_len == 0) {
- ++sc->sc_stats.ppp_obytes;
- putc(PPP_FLAG);
- }
-
- /* 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;
- /* NetBSD (0.9 or later), 4.3-Reno or similar. */
- for(i=0;i<n;i++)
- if (putc(start[i]))
- break;
- 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 (putc(PPP_ESCAPE))
- break;
- if (putc(*start ^ PPP_TRANS)) {
- unputc();
- break;
- }
- 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.
- */
- for (q = endseq; q < p; ++q)
- if (putc(*q)) {
- done = 0;
- for (; q > endseq; --q)
- unputc();
- break;
- }
- if (done)
- sc->sc_stats.ppp_obytes += q - 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;
- }
-
-}
-
-static void
-pppasyncctlp(sc)
- struct ppp_softc *sc;
-{
- rtems_semaphore_release(ModemData.pppsem);
-}
-
-
-static unsigned paritytab[8] = {
- 0x96696996, 0x69969669, 0x69969669, 0x96696996,
- 0x69969669, 0x96696996, 0x96696996, 0x69969669
-};
-#define MAX_DUMP_BYTES 128
-
-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;
-
-}
-
-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
-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;
- }
-}
-
-
-int
-pppinput(c)
- int c;
-
-{
- register struct ppp_softc *sc=ModemData.t_sc;
- struct mbuf *m;
- int ilen, s;
-
- if (sc == NULL )
- return 0;
-
- ++sc->sc_stats.ppp_ibytes;
-/*
- 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;
- }*/
-
- 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;
-}
-
-
-void
-modem_txDaemon (void *arg)
-{
- rtems_event_set events;
- register int level,i,maxonce;
- while (1)
- {
- if (xmt_len==0) //if there is nothing then wait for an event
- rtems_event_receive(START_TRANSMIT_EVENT|INTERRUPT_EVENT,RTEMS_EVENT_ANY | RTEMS_WAIT, RTEMS_NO_TIMEOUT,&events);
- /* wait for transmit buffer to become empty */
-
- while(_tx_stop) //here we are wainting for transmission start
- rtems_event_receive(INTERRUPT_EVENT|START_TRANSMIT_EVENT,RTEMS_EVENT_ANY | RTEMS_WAIT, RTEMS_NO_TIMEOUT,&events);
-
- _CPU_ISR_Disable(level);
- if (*LSR & THRE) //if there is no transmission then send first bytes, if there is one they will go eitherway
- {
- maxonce=(xmt_len>14)?14:xmt_len;
- if (maxonce>0)
- {
- for (i=0;i<maxonce;i++)
- {
- *THR=xmt_buf[xmt_start];
- xmt_start=(xmt_start+1)%MODEM_BUFFER_LENGTH;
- }
- xmt_len-=maxonce;
- }
- }
- _CPU_ISR_Enable(level);
- if ((ModemData.t_line==PPPDISC))
- {
- rtems_bsdnet_semaphore_obtain();
- modem_sendpacket();
- rtems_bsdnet_semaphore_release();
- }
-
- }
-}
-
-static void modem_rxDaemon (void *arg)
-{
- rtems_event_set events;
- unsigned char bufor_posr[MODEM_BUFFER_LENGTH];
- register unsigned char ch;
- int level,i,j;
- while(1)
- {
- /* wait for interrupt */
- i=0;
- _CPU_ISR_Disable(level);
- while(rcv_len>0)
- {
- bufor_posr[i++]=rcv_buf[rcv_start];
- rcv_start=(rcv_start+1)%MODEM_BUFFER_LENGTH;
- rcv_len--;
- }
- _CPU_ISR_Enable(level);
- if (ModemData.t_line==PPPDISC)
- {
- rtems_bsdnet_semaphore_obtain();
- for(j=0;j<i;j++)
- pppinput(bufor_posr[j]);
- rtems_bsdnet_semaphore_release();
- }
- else
- if (i!=0)rtems_termios_enqueue_raw_characters(modem_tty,bufor_posr,i);
- rtems_event_receive(INTERRUPT_EVENT,RTEMS_EVENT_ANY | RTEMS_WAIT, RTEMS_NO_TIMEOUT,&events);
- }
-}
-#define CLK_FREQ 1843200
-void set_modem_speed(int speed)
-{
- *LCR = (char)(DLAB);
- *DLL = (char)((int)(CLK_FREQ/speed/16.0+0.5) & 0xFF);
- *DLM = (char)(((int)(CLK_FREQ/speed/16.0+0.5) & 0xFF00) >> 8);
- *LCR = (char)(WL_8 ); /* 8 bitowe slowo */
-}
-
-
-static void
-modem_init (int speed) /* port is the SMC number (i.e. 1 or 2) */
-{
- set_modem_speed(speed);
- /* Line control setup */
-
- *LCR = (char)(WL_8 ); /* 8 bit word */
- /* was NSB - was 2 is 1*/
-
- /* Interrupt setup */
- *IER = (char) 0x0f; /* enable transmit, receive, modem stat int */
-
- /* FIFO setup */
- *FCR = (char)(FIFO_E | 0xc0);
-
- /* Modem control setup */
- *MCR = (char) RTS|DTR|OUT2;
-
- /* init tx_stop with CTS */
- _tx_stop = ( (*MDSR & CTS) ? 0 : 1);
-}
-
-void set_modem_dtr(int how)
-{
- unsigned char ch;
- ch=*MCR;
- *MCR=(how)?(ch|DTR):(ch&(~DTR));
-}
-void modem_status()
-{
- unsigned char status;
- status=*MDSR;
-
-/* printf("Modem Status %x ",status);
-*/ if (status&CTS)
- {
- _tx_stop=0;
- rtems_event_send (modem_tx_task, START_TRANSMIT_EVENT|INTERRUPT_EVENT);
- }
- else
- {
- _tx_stop=1;
- }
- if (status&DCD)
- _modem_cd=1;
- else
- _modem_cd=0;
-}
-
-static rtems_isr
-modemInterruptHandler (rtems_vector_number v)
-{
- register char a,i,ch;
- register int maxonce;
- static errcount = 0;
- for(;;)
- {
- a=*IIR & (NIP | IID_MASK); /* read interrupt id register */
- switch (a) {
- case 0x04: case 0x0c:
- /*
- * Buffer received?
- */
- while( (*LSR & DR) != 0)
- {
- ch=*RBR;
- rcv_buf[(rcv_start+rcv_len)%MODEM_BUFFER_LENGTH]=ch;
- rcv_len++;
- }
- rtems_event_send (modem_rx_task, INTERRUPT_EVENT);
- break;
- case 0x02:
- /*
- * Buffer transmitted ?
- */
- if (*LSR & THRE) //if there is no transmission (and it shouldn't be) then send some bytes
- {
- maxonce=(xmt_len>14)?14:xmt_len;
- if (maxonce>0)
- {
- for (i=0;i<maxonce;i++)
- {
- *THR=xmt_buf[xmt_start];
- xmt_start=(xmt_start+1)%MODEM_BUFFER_LENGTH;
- }
- xmt_len-=maxonce;
- }
- }
- rtems_event_send (modem_tx_task, INTERRUPT_EVENT);
- break;
- case 0x00:
- modem_status();
- break;
- case 0x01:
- return;
- case 0x06:
- ch=*RBR;
- errcount++;
- break;
-
- default:
- break;
- }
- }
-}
-
-
-void modem_flush(int mode)
-{
- if (mode&FWRITE)
- {
- }
- if (mode&FREAD)
- {
- }
-
-}
-
-
-
-int modemWriteTermios(int minor, const char *buf, int len)
-{
- int level;
- int i,maxonce;
- if (len<=0)
- return 0;
-
- if (ModemData.t_line!=PPPDISC)
- {
- _CPU_ISR_Disable(level);
- for(i=0;i<len;i++)
- {
- if (xmt_len>=MODEM_BUFFER_LENGTH)
- break;
- xmt_buf[(xmt_start+xmt_len)%MODEM_BUFFER_LENGTH]=buf[i];
- xmt_len++;
- }
- _CPU_ISR_Enable(level);
- }
- rtems_event_send(modem_tx_task,START_TRANSMIT_EVENT);
- return i;
-}
-
-
-/*
- * Initialize and register the device
- */
-rtems_device_driver modem_initialize(
- rtems_device_major_number major,
- rtems_device_minor_number minor,
- void *arg
-)
-{
- rtems_status_code status;
- rtems_isr_entry old_handler;
- rtems_status_code sc;
- rtems_termios_initialize ();
- sc = rtems_semaphore_create (
- rtems_build_name ('M', 'D', 'M', 'P'),
- 0,
- RTEMS_COUNTING_SEMAPHORE,
- RTEMS_NO_PRIORITY_CEILING,
- &ModemData.pppsem);
- if (sc != RTEMS_SUCCESSFUL)
- rtems_fatal_error_occurred (sc);
- modem_init(9600);
-
- sc = rtems_interrupt_catch (modemInterruptHandler,
- PPC_IRQ_IRQ4,
- &old_handler);
-
- /*
- * Register the devices
- */
- modem_tx_task=0;
- modem_rx_task=0;
- status = rtems_io_register_name ("/dev/modem", major, 0);
- if (status != RTEMS_SUCCESSFUL)
- rtems_fatal_error_occurred (status);
- return RTEMS_SUCCESSFUL;
-}
-
-rtems_device_driver modem_first_open(
- rtems_device_major_number major,
- rtems_device_minor_number minor,
- void * arg
-)
-{
- modem_tty=(struct rtems_termios_tty *)(((rtems_libio_open_close_args_t *)arg)->iop->data1);
- return RTEMS_SUCCESSFUL;
-}
-rtems_device_driver modem_last_close(
- rtems_device_major_number major,
- rtems_device_minor_number minor,
- void * arg
-)
-{
- m823.siu.simask &=(~M823_SIMASK_IRM4); /* block the interrupts */
- return RTEMS_SUCCESSFUL;
-}
-
-static int
-modemSetAttr(int minor, const struct termios *t)
-{
- int baud;
-
- switch (t->c_cflag & CBAUD)
- {
- case B50:
- baud = 50;
- break;
- case B75:
- baud = 75;
- break;
- case B110:
- baud = 110;
- break;
- case B134:
- baud = 134;
- break;
- case B150:
- baud = 150;
- break;
- case B200:
- baud = 200;
- break;
- case B300:
- baud = 300;
- break;
- case B600:
- baud = 600;
- break;
- case B1200:
- baud = 1200;
- break;
- case B1800:
- baud = 1800;
- break;
- case B2400:
- baud = 2400;
- break;
- case B4800:
- baud = 4800;
- break;
- case B9600:
- baud = 9600;
- break;
- case B19200:
- baud = 19200;
- break;
- case B38400:
- baud = 38400;
- break;
- case B57600:
- baud = 57600;
- break;
- case B115200:
- baud = 115200;
- break;
- default:
- baud = 0;
- rtems_fatal_error_occurred (RTEMS_INTERNAL_ERROR);
- return 0;
- }
- set_modem_speed(baud);
- return RTEMS_SUCCESSFUL;
-}
-
-
-/*
- * Open the device
- */
-
-
-
-rtems_device_driver modem_open(
- rtems_device_major_number major,
- rtems_device_minor_number minor,
- void * arg
-)
-{
- int error, s;
- rtems_status_code status;
- register struct ppp_softc *sc;
- static rtems_termios_callbacks cb =
- {
- modem_first_open, /* firstOpen */
- modem_last_close, /* lastClose */
- NULL, /* poll read */
- modemWriteTermios, /* write */
- modemSetAttr, /* setAttributes */
- NULL, /* stopRemoteTx */
- NULL, /* startRemoteTx */
- 0 /* outputUsesInterrupts */
- };
-
- if (ModemData.t_line == PPPDISC)
- {
- sc = ModemData.t_sc;
- if (sc != NULL && sc->sc_devp == (void *) &ModemData)
- {
- return (0);
- }
- }
-
- if ((ModemData.t_sc= sc = pppalloc(1)) == NULL)
- return 2;
-
- 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 = &ModemData;
- 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 = 38400;
-
- status = rtems_termios_open (major, minor, arg, &cb);
- if(status != RTEMS_SUCCESSFUL)
- {
-/* printf("Error openning console device\n");
-*/ return status;
- }
-
-
-/* init rx and tx task for device */
- xmt_start=xmt_len=0;
- rcv_start=rcv_len=0;
-
- if (modem_rx_task==0 && modem_tx_task==0)
- {
- rtems_status_code sc;
- sc = rtems_task_create (rtems_build_name ('M', 'D', 't', 'x'),
- 101,
- 16*1024,
- RTEMS_PREEMPT|RTEMS_TIMESLICE|RTEMS_NO_ASR|RTEMS_INTERRUPT_LEVEL(0),
- RTEMS_NO_FLOATING_POINT|RTEMS_LOCAL,
- &modem_tx_task);
- if (sc != RTEMS_SUCCESSFUL) {
-
- }
-
- sc = rtems_task_start (modem_tx_task, (void *)modem_txDaemon, 0);
- if (sc != RTEMS_SUCCESSFUL) {
-
- }
-
- sc = rtems_task_create (rtems_build_name ('M', 'D', 'r', 'x'),
- 101,
- 16*1024,
- RTEMS_PREEMPT|RTEMS_TIMESLICE|RTEMS_NO_ASR|RTEMS_INTERRUPT_LEVEL(0),
- RTEMS_NO_FLOATING_POINT|RTEMS_LOCAL,
- &modem_rx_task);
- if (sc != RTEMS_SUCCESSFUL) {
-
- }
-
- sc = rtems_task_start (modem_rx_task, (void *)modem_rxDaemon, 0);
- if (sc != RTEMS_SUCCESSFUL) {
-
- }
-
- }
- /* Enable modem interrupts */
- m823.siu.simask |= M823_SIMASK_IRM4;
-
- return RTEMS_SUCCESSFUL;
-}
-
-/*
- * Close the device
- */
-rtems_device_driver modem_close(
- rtems_device_major_number major,
- rtems_device_minor_number minor,
- void * arg
-)
-{
- register struct ppp_softc *sc;
- modem_flush( FREAD|FWRITE);
-
- ModemData.t_line = 0;
- sc = ModemData.t_sc;
- if (sc != NULL) {
- ModemData.t_sc = NULL;
- if (&ModemData == (struct tty *) sc->sc_devp) {
- rtems_bsdnet_semaphore_obtain();
- pppasyncrelinq(sc);
- pppdealloc(sc);
- rtems_bsdnet_semaphore_release();
- }
- }
- return RTEMS_SUCCESSFUL;
-}
-
-/* for now works only as serial device */
-
-
-rtems_device_driver modem_read(
- rtems_device_major_number major,
- rtems_device_minor_number minor,
- void * arg
-)
-{
- rtems_libio_rw_args_t *rw_args= (rtems_libio_rw_args_t *)arg;
- char *buffer;
- int count=0,maximum;
- rtems_status_code sc;
-
- buffer = rw_args->buffer;
- maximum = rw_args->count;
- if (ModemData.t_line==PPPDISC)
- {
-
- struct mbuf *m, *m0;
- register int s;
- int error = 0;
- rtems_status_code status;
- rtems_interval ticks;
- register struct ppp_softc *sc = (struct ppp_softc *)ModemData.t_sc;
- 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)
- {
-/* printf("Read : Data are in the buffer\n");
-*/ break;
- }
-/* printf("Read : Waiting for data\n");
-*/
- status=rtems_semaphore_obtain(ModemData.pppsem,RTEMS_WAIT,ticks);
- if (_modem_cd==0)
- {
- rw_args->bytes_moved =0;
- return RTEMS_SUCCESSFUL;
- }
-
- if (status==RTEMS_TIMEOUT)
- return status;
- }
- rtems_bsdnet_semaphore_obtain();
- IF_DEQUEUE(&sc->sc_inq, m0);
- rtems_bsdnet_semaphore_release();
-
- for (m = m0; m && (count+m->m_next->m_len<maximum); m = m->m_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;
-
- }
- else
- sc = rtems_termios_read (arg);
-
- count=rw_args->bytes_moved;
- return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED;
-}
-
-/*
- * Write to the device
- */
-rtems_device_driver modem_write(
- rtems_device_major_number major,
- rtems_device_minor_number minor,
- void * arg
-)
-{
- int count,len;
- rtems_libio_rw_args_t *rw_args;
- char *out_buffer;
- int n,maximum;
- rw_args = (rtems_libio_rw_args_t *) arg;
-
- out_buffer = rw_args->buffer;
- maximum = rw_args->count;
-
- if (ModemData.t_line==PPPDISC)
- {
- register struct ppp_softc *sc = (struct ppp_softc *)ModemData.t_sc;
- struct sockaddr dst;
- struct mbuf *m, *m0, **mp;
- 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;
-
-/* printf("Sending %d bytes \n",m0->m_len);
-*/ n=pppoutput(&sc->sc_if, m0, &dst, (struct rtentry *)0);
- rtems_bsdnet_semaphore_release();
- return n;
- }
- else
- return rtems_termios_write (arg);
-}
-
-
-
-/*
- * Handle ioctl request.
- * Should set hardware line speed, bits/char, etc.
- */
-rtems_device_driver modem_control(
- rtems_device_major_number major,
- rtems_device_minor_number minor,
- void * arg
-)
-{
- rtems_libio_ioctl_args_t *args=(rtems_libio_ioctl_args_t *)arg;
- struct ppp_softc *sc=ModemData.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:
- return rtems_termios_ioctl (arg);
- 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 TIOCSETD:
- ModemData.t_line=*(int*)data;
- break;
- case TIOCGETD:
- *(int*)data=ModemData.t_line;
- break;
- case TIOCMBIS:
- if ((*(int*)data)&TIOCM_DTR)
- set_modem_dtr(1);
- break;
- case TIOCMBIC:
- if ((*(int*)data)&TIOCM_DTR)
- set_modem_dtr(0);
- 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;
-
-}
-
-
-
-void
-wait_input(timo)
- struct timeval *timo;
-{
- int n;
- rtems_event_set events;
- rtems_interval ticks;
- rtems_status_code err;
- int num_wait=1;
- register struct ppp_softc *sc = (struct ppp_softc *)ModemData.t_sc;
- ticks = 1+(timo->tv_sec*1000000+timo->tv_usec)/rtems_bsdnet_microseconds_per_tick;
- while (num_wait)
- {
-
- if (sc->sc_inq.ifq_head != NULL)
- break;
-/* printf("Wait : Waiting for data for %d ticks\n",ticks);
-*/ err=rtems_semaphore_obtain(ModemData.pppsem,RTEMS_WAIT,ticks);
- if (err==RTEMS_TIMEOUT)
- {
-/* printf("TIMEOUT : No data\n");
-*/ break;
- }
- }
-
-}
diff --git a/c/src/libnetworking/pppd/modem_example/modem.h b/c/src/libnetworking/pppd/modem_example/modem.h
deleted file mode 100644
index cd4b4db52d..0000000000
--- a/c/src/libnetworking/pppd/modem_example/modem.h
+++ /dev/null
@@ -1,45 +0,0 @@
-#ifndef _MODEM_H_
-#define _MODEM_H_
-
-void modem_reserve_resources(
- rtems_configuration_table * configuration
-);
-
-rtems_device_driver modem_initialize(
- rtems_device_major_number,
- rtems_device_minor_number,
- void *
-);
-
-rtems_device_driver modem_open(
- rtems_device_major_number,
- rtems_device_minor_number,
- void *
-);
-
-rtems_device_driver modem_close(
- rtems_device_major_number,
- rtems_device_minor_number,
- void *
-);
-
-rtems_device_driver modem_read(
- rtems_device_major_number,
- rtems_device_minor_number,
- void *
-);
-
-rtems_device_driver modem_write(
- rtems_device_major_number,
- rtems_device_minor_number,
- void *
-);
-
-rtems_device_driver modem_control(
- rtems_device_major_number,
- rtems_device_minor_number,
- void *
-);
-
-
-#endif
diff --git a/c/src/libnetworking/pppd/modem_example/ppp.c b/c/src/libnetworking/pppd/modem_example/ppp.c
deleted file mode 100644
index 22c53302fe..0000000000
--- a/c/src/libnetworking/pppd/modem_example/ppp.c
+++ /dev/null
@@ -1,1504 +0,0 @@
-/*
- * 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
-/* temporarily we switch off the compression */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/proc.h>
-#include <sys/mbuf.h>
-#include <sys/socket.h>
-#include <sys/ioctl.h>
-#include <sys/kernel.h>
-#include <sys/time.h>
-#include <sys/malloc.h>
-
-#include <rtems/rtems_bsdnet.h>
-#include <net/if.h>
-#include <sys/errno.h>
-#include <net/if_types.h>
-#include <net/netisr.h>
-#include <net/route.h>
-#ifdef PPP_FILTER
-#include <net/bpf.h>
-#endif
-
-#ifdef INET
-#include <netinet/in.h>
-#include <netinet/in_systm.h>
-#include <netinet/in_var.h>
-#include <netinet/ip.h>
-#endif
-
-#include <bpfilter.h>
-#if NBPFILTER > 0
-#include <net/bpf.h>
-#endif
-
-#ifdef VJC
-#include <net/pppcompress.h>
-#endif
-
-#include <net/ppp_defs.h>
-#include <net/if_ppp.h>
-#include <net/if_pppvar.h>
-#include <machine/cpu.h>
-
-#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 <net/ppp-comp.h>
-#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)
-{
- 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
- }
-/* hardcoded in 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/pppd/modem_example/ppp.h b/c/src/libnetworking/pppd/modem_example/ppp.h
deleted file mode 100644
index a1f1038f0d..0000000000
--- a/c/src/libnetworking/pppd/modem_example/ppp.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef __PPP_H__
-#define __PPP_H__
-#define NPPP 1
-#define NBPFILER 0
-#define VJC
-/*#define PPP_COMPRESS*/
-#endif
diff --git a/c/src/libnetworking/pppd/modem_example/pppcompress.c b/c/src/libnetworking/pppd/modem_example/pppcompress.c
deleted file mode 100644
index a7d2734c8d..0000000000
--- a/c/src/libnetworking/pppd/modem_example/pppcompress.c
+++ /dev/null
@@ -1,593 +0,0 @@
-/*-
- * 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 <sys/types.h>
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/mbuf.h>
-#include <sys/socket.h>
-#include <sys/socketvar.h>
-
-#include <netinet/in.h>
-#include <netinet/in_systm.h>
-#include <netinet/ip.h>
-#include <netinet/tcp.h>
-
-#include <net/pppcompress.h>
-
-#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);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-26 17:52:02 +0000