--- /dev/null
+#
+# Makefile for AIX 4.1
+#
+#
+# $Id: Makefile,v 1.1 1994/12/05 00:29:21 paulus Exp $
+#
+#ifndef DRIVERS
+DRIVERS=/usr/lib/drivers
+#endif
+
+CC=xlc
+IFLAGS = -I..
+DFLAGS = -D_KERNEL -DINET -DPPP_VD -DNUM_PPP=5 -DDEBUGS -DPPP_STATS -DVJC
+CFLAGS = $(DFLAGS) $(IFLAGS)
+
+KIMP = -bI:/lib/pse.exp -bI:/lib/kernex.exp -bI:/lib/syscalls.exp
+NETIMP = -bI:/lib/netinet.exp
+KLIBS = /lib/libsys.a /lib/libcsys.a
+
+
+OBJ = vjcompress.o ppp_if.o ppp_async.o bsd-comp.o ppp_comp.o
+
+all: ppp_if ppp_async ppp_comp
+
+ppp_if: ppp_if.o vjcompress.o
+ ld -o ppp_if ppp_if.o -e ppp_load -bE:ppp_if.exp vjcompress.o ${KIMP} ${NETIMP} ${KLIBS}
+
+ppp_async: ppp_async.o
+ ld -o ppp_async ppp_async.o -e ppp_async_load -bE:ppp_async.exp ${KIMP} ${NETIMP} ${KLIBS}
+
+ppp_comp: ppp_comp.o bsd-comp.o
+ ld -o ppp_comp ppp_comp.o -e pppcomp_load bsd-comp.o ${KIMP} ${NETIMP} ${KLIBS}
+
+vjcompress.o: vjcompress.c
+bsd-comp.o: bsd-comp.c
+ppp_if.o: ppp_if.c
+ppp_async.o: ppp_async.c
+ppp_comp.o: ppp_comp.c
+
+install: all
+ install -f ${DRIVERS} -M 500 ppp_if
+ install -f ${DRIVERS} -M 500 ppp_async
+ install -f ${DRIVERS} -M 500 ppp_comp
+ grep "strload -m ${DRIVERS}/ppp_if" /etc/rc.tcpip || { \
+ echo strload -m ${DRIVERS}/ppp_if; \
+ echo strload -m ${DRIVERS}/ppp_async; \
+ echo strload -m ${DRIVERS}/ppp_comp; \
+ } >>/etc/rc.tcpip
+
+clean:
+ rm -f $(OBJ) ppp_if ppp_async ppp_comp
--- /dev/null
+/*
+ ppp_async.c - Streams async functions Also does FCS
+
+ Copyright (C) 1990 Brad K. Clements, All Rights Reserved
+ fcstab and some ideas nicked from if_ppp.c from cmu.
+ See copyright notice in if_ppp.h and NOTES
+
+ $Id: ppp_async.c,v 1.1 1994/12/05 00:29:21 paulus Exp $
+*/
+
+#include <sys/types.h>
+
+#ifndef PPP_VD
+#include "ppp.h"
+#endif
+
+#if NUM_PPP > 0
+
+#define STREAMS 1
+#define DEBUGS 1
+#include <net/net_globals.h>
+#include <sys/param.h>
+#include <sys/stream.h>
+#include <sys/stropts.h>
+#include <sys/strconf.h>
+#include <sys/device.h>
+#include <sys/dir.h>
+#include <sys/signal.h>
+#include <sys/user.h>
+#include <sys/mbuf.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include <netinet/in.h>
+
+#include <net/ppp_defs.h>
+#include <net/ppp_str.h>
+
+/* how big of a buffer block to allocate for each chunk of the input chain */
+#define ALLOCBSIZE 64
+
+#ifdef DEBUGS
+#include <sys/syslog.h>
+#define DLOG(s,a) if (p->pai_flags&PAI_FLAGS_DEBUG) bsdlog(LOG_INFO, s, a)
+
+int ppp_async_max_dump_bytes = 28;
+#define MAX_DUMP_BYTES 1504
+
+static void ppp_dump_frame();
+
+#else
+#define DLOG(s) {}
+#endif
+
+static int ppp_async_open(), ppp_async_close(), ppp_async_rput(),
+ ppp_async_wput(), ppp_async_wsrv(), ppp_async_rsrv();
+
+static struct module_info minfo ={
+ 0xabcd,"ppp_async",0, INFPSZ, 16384, 4096
+};
+
+static struct qinit r_init = {
+ ppp_async_rput, ppp_async_rsrv, ppp_async_open, ppp_async_close,
+ NULL, &minfo, NULL
+};
+static struct qinit w_init = {
+ ppp_async_wput, ppp_async_wsrv, ppp_async_open, ppp_async_close,
+ NULL, &minfo, NULL
+};
+struct streamtab ppp_asyncinfo = {
+ &r_init, &w_init, NULL, NULL
+};
+
+/*
+ * 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
+};
+
+
+struct ppp_async_info {
+ u_int pai_flags;
+ int pai_buffsize; /* how big of an input buffer to alloc */
+ int pai_buffcount; /* how many chars currently in input buffer */
+ u_short pai_fcs; /* the current fcs */
+ mblk_t *pai_buffer; /* pointer to the current buffer list */
+ mblk_t *pai_bufftail; /* pointer to the current input block */
+ ext_accm pai_asyncmap; /* current outgoing asyncmap */
+ u_long pai_rasyncmap; /* current receive asyncmap */
+};
+
+/* Values for pai_flags */
+#define PAI_FLAGS_INUSE 0x1
+#define PAI_FLAGS_FLUSH 0x2
+#define PAI_FLAGS_ESCAPED 0x4
+#define PAI_FLAGS_COMPPROT 0x8
+#define PAI_FLAGS_COMPAC 0x10
+#define PAI_FLAGS_RCV_COMPPROT 0x20
+#define PAI_FLAGS_RCV_COMPAC 0x40
+
+#define PAI_FLAGS_DEBUG 0x1000
+#define PAI_FLAGS_LOG_INPKT 0x2000
+#define PAI_FLAGS_LOG_OUTPKT 0x4000
+#define PAI_FLAGS_ALL_DEBUG 0x7000
+
+typedef struct ppp_async_info PAI;
+
+static PAI pai[NUM_PPP*2]; /* our private cache of async ctrl structs */
+
+static strconf_t pppasync_conf = {
+ "pppasync", &ppp_asyncinfo, STR_NEW_OPEN, 0, SQLVL_DEFAULT, (void *) 0
+};
+
+int ppp_async_load(int cmd, struct uio *uiop)
+{
+ int rc;
+
+ switch (cmd) {
+ case CFG_INIT:
+ rc = str_install(STR_LOAD_MOD, &pppasync_conf);
+ break;
+ case CFG_TERM:
+ rc = str_install(STR_UNLOAD_MOD, &pppasync_conf);
+ break;
+ default:
+ rc = EINVAL;
+ break;
+ }
+ return(rc);
+}
+
+/* open might fail if we don't have any more pai elements left free */
+static int
+ppp_async_open(q, dev, flag, sflag)
+ queue_t *q;
+ dev_t dev;
+ int flag;
+ int sflag;
+{
+ register PAI *p;
+ register int x;
+ int s;
+
+ /* only let the superuser or setuid root ppl open this module */
+ if (!suser()) {
+ return(EPERM);
+ }
+
+ if (!q->q_ptr) {
+ for (x=0; x < NUM_PPP; x++) /* search for an empty PAI */
+ if (!(pai[x].pai_flags & PAI_FLAGS_INUSE))
+ break;
+ if (x == NUM_PPP) { /* all buffers in use */
+ return(ENOBUFS);
+ }
+ p = &pai[x];
+ DLOG("ppp_async%d: opening\n",x);
+
+ /* initialize the unit to default values */
+ WR(q)->q_ptr = q->q_ptr = (caddr_t) p;
+ bzero(p, sizeof(*p));
+ p->pai_flags = PAI_FLAGS_INUSE | PAI_FLAGS_RCV_COMPAC
+ | PAI_FLAGS_RCV_COMPPROT;
+ p->pai_asyncmap[0] = 0xffffffff; /* default async map */
+ p->pai_asyncmap[3] = 0x60000000; /* escape 7d, 7e */
+ p->pai_buffsize = PPP_MTU + PPP_HDRLEN + PPP_FCSLEN;
+ }
+ else {
+ p = (PAI *) q->q_ptr;
+ DLOG("ppp_async%d: reopen\n", p - pai);
+ }
+ return(0);
+}
+
+static int
+ppp_async_close(q)
+ queue_t *q; /* queue info */
+{
+ int s;
+ register PAI *p;
+
+ if ((p = (PAI *) q->q_ptr) != NULL) {
+ p->pai_flags = 0; /* clear all flags */
+ if (p->pai_buffer) {
+ /* currently receiving some chars, discard the buffer */
+ freemsg(p->pai_buffer);
+ p->pai_buffer = NULL;
+ }
+ DLOG("ppp_async%d: closing\n", p - pai);
+ }
+ return(0);
+}
+
+
+/* M_IOCTL processing is performed at this level. There is some
+ weirdness here, but I couldn't think of an easier way to handle it.
+
+ SIOC{G,S}IF{,R,X}ASYNCMAP are handled here.
+
+ SIOCSIFCOMPAC and SIOCSIFCOMPPROT are both handled here.
+
+ SIOCSIFMRU and SIOCGIFMRU (Max Receive Unit) are both handled here.
+ Rather than using the MTU to set the MRU, we have a seperate IOCTL for it.
+*/
+
+static int
+ppp_async_wput(q, mp)
+ queue_t *q;
+ register mblk_t *mp;
+{
+ register struct iocblk *i;
+ register PAI *p;
+ int x, flags;
+
+ switch (mp->b_datap->db_type) {
+
+ case M_FLUSH :
+ if (*mp->b_rptr & FLUSHW)
+ flushq(q, FLUSHDATA);
+ putnext(q, mp); /* send it along too */
+ break;
+
+ case M_DATA :
+ putq(q, mp); /* queue it for my service routine */
+ break;
+
+ case M_IOCTL :
+ i = (struct iocblk *) mp->b_rptr;
+ p = (PAI *) q->q_ptr;
+ switch ((unsigned int)i->ioc_cmd) {
+
+ case SIOCSIFCOMPAC : /* enable or disable AC compression */
+ if (i->ioc_count != TRANSPARENT) {
+ i->ioc_error = EINVAL;
+ goto iocnak;
+ }
+ x = *(u_int *) mp->b_cont->b_rptr;
+ DLOG("ppp_async: SIFCOMPAC %d\n", x);
+ flags = (x & 2)? PAI_FLAGS_RCV_COMPAC: PAI_FLAGS_COMPAC;
+ if (x & 1)
+ p->pai_flags |= flags;
+ else
+ p->pai_flags &= ~flags;
+ i->ioc_count = 0;
+ goto iocack;
+
+ case SIOCSIFCOMPPROT: /* enable or disable PROT compression */
+ if (i->ioc_count != TRANSPARENT) {
+ i->ioc_error = EINVAL;
+ goto iocnak;
+ }
+ x = *(u_int *) mp->b_cont->b_rptr;
+ DLOG("ppp_async: SIFCOMPPROT %d\n", x);
+ flags = (x & 2)? PAI_FLAGS_RCV_COMPPROT: PAI_FLAGS_COMPPROT;
+ if (x & 1)
+ p->pai_flags |= flags;
+ else
+ p->pai_flags &= ~flags;
+ i->ioc_count = 0;
+ goto iocack;
+
+
+ case SIOCSIFMRU :
+ if ((i->ioc_count != TRANSPARENT) &&
+ (i->ioc_count != sizeof(int))) {
+ i->ioc_error = EINVAL;
+ goto iocnak;
+ }
+ x = *(int *) mp->b_cont->b_rptr;
+ if (x < PPP_MTU)
+ x = PPP_MTU;
+ x += PPP_HDRLEN + PPP_FCSLEN;
+ if (x > 4096) { /* couldn't allocb something this big */
+ i->ioc_error = EINVAL;
+ goto iocnak;
+ }
+ p->pai_buffsize = x;
+ i->ioc_count = 0;
+ goto iocack;
+
+ case SIOCGIFMRU :
+ if ((mp->b_cont = allocb(sizeof(int), BPRI_MED)) != NULL) {
+ *(int *) mp->b_cont->b_wptr =
+ p->pai_buffsize - (PPP_HDRLEN + PPP_FCSLEN);
+ mp->b_cont->b_wptr += i->ioc_count = sizeof(int);
+ goto iocack;
+ }
+ i->ioc_error = ENOSR;
+ goto iocnak;
+
+ case SIOCGIFASYNCMAP :
+ if ((mp->b_cont = allocb(sizeof(u_long), BPRI_MED)) != NULL) {
+ *(u_long *) mp->b_cont->b_wptr = p->pai_asyncmap[0];
+ mp->b_cont->b_wptr += i->ioc_count = sizeof(u_long);
+ goto iocack;
+ }
+ i->ioc_error = ENOSR;
+ goto iocnak;
+
+ case SIOCSIFASYNCMAP :
+ if ((i->ioc_count != TRANSPARENT) &&
+ (i->ioc_count != sizeof(u_long))) {
+ i->ioc_error = EINVAL;
+ goto iocnak; /* ugh, goto */
+ }
+ p->pai_asyncmap[0] = *(u_long *) mp->b_cont->b_rptr;
+ DLOG("ppp_async: SIFASYNCMAP %lx\n", p->pai_asyncmap[0]);
+ i->ioc_count = 0;
+ goto iocack;
+
+ case SIOCGIFRASYNCMAP :
+ if ((mp->b_cont = allocb(sizeof(u_long), BPRI_MED)) != NULL) {
+ *(u_long *) mp->b_cont->b_wptr = p->pai_rasyncmap;
+ mp->b_cont->b_wptr += i->ioc_count = sizeof(u_long);
+ goto iocack;
+ }
+ i->ioc_error = ENOSR;
+ goto iocnak;
+
+ case SIOCSIFRASYNCMAP :
+ if ((i->ioc_count != TRANSPARENT) &&
+ (i->ioc_count != sizeof(u_long))) {
+ i->ioc_error = EINVAL;
+ goto iocnak; /* ugh, goto */
+ }
+ p->pai_rasyncmap = *(u_long *) mp->b_cont->b_rptr;
+ DLOG("ppp_async: SIFRASYNCMAP %lx\n", p->pai_rasyncmap);
+ i->ioc_count = 0;
+ goto iocack;
+
+ case SIOCGIFXASYNCMAP :
+ if ((mp->b_cont = allocb(sizeof(ext_accm), BPRI_MED)) != NULL) {
+ bcopy(p->pai_asyncmap, mp->b_cont->b_wptr, sizeof(ext_accm));
+ mp->b_cont->b_wptr += i->ioc_count = sizeof(ext_accm);
+ goto iocack;
+ }
+ i->ioc_error = ENOSR;
+ goto iocnak;
+
+ case SIOCSIFXASYNCMAP :
+ if ((i->ioc_count != TRANSPARENT) &&
+ (i->ioc_count != sizeof(ext_accm))) {
+ i->ioc_error = EINVAL;
+ goto iocnak; /* ugh, goto */
+ }
+ bcopy(*mp->b_cont->b_rptr, p->pai_asyncmap, sizeof(ext_accm));
+ p->pai_asyncmap[1] = 0; /* can't escape 20-3f */
+ p->pai_asyncmap[2] &= ~0x40000000; /* can't escape 5e */
+ p->pai_asyncmap[3] |= 0x60000000; /* must escape 7d, 7e */
+ i->ioc_count = 0;
+ goto iocack;
+
+ case SIOCGIFDEBUG :
+ if ((mp->b_cont = allocb(sizeof(int), BPRI_MED)) != NULL) {
+ *(int *)mp->b_cont->b_wptr =
+ (unsigned)(p->pai_flags & PAI_FLAGS_ALL_DEBUG)
+ / PAI_FLAGS_DEBUG |
+ (p->pai_flags & PAI_FLAGS_HIBITS);
+ mp->b_cont->b_wptr += i->ioc_count = sizeof(int);
+ goto iocack;
+ }
+ i->ioc_error = ENOSR;
+ goto iocnak;
+
+ case SIOCSIFDEBUG :
+ if ((i->ioc_count != TRANSPARENT) &&
+ (i->ioc_count != sizeof(int))) {
+ i->ioc_error = EINVAL;
+ goto iocnak; /* ugh, goto */
+ }
+ flags = *(int *)mp->b_cont->b_rptr;
+ DLOG("ppp_async: SIFIFDEBUG %x\n", flags);
+ p->pai_flags &= ~PAI_FLAGS_ALL_DEBUG | PAI_FLAGS_HIBITS;
+ p->pai_flags |= ((unsigned) flags * PAI_FLAGS_DEBUG)
+ & PAI_FLAGS_ALL_DEBUG;
+ i->ioc_count = 0;
+ goto iocack;
+
+ iocack:;
+ mp->b_datap->db_type = M_IOCACK;
+ qreply(q,mp);
+ break;
+ iocnak:;
+ i->ioc_count = 0;
+ mp->b_datap->db_type = M_IOCNAK;
+ qreply(q, mp);
+ break;
+ default: /* unknown IOCTL call */
+ putnext(q,mp); /* pass it along */
+ }
+ break;
+
+ default:
+ putnext(q, mp); /* don't know what to do with this, so send it along*/
+ }
+}
+
+static int
+ppp_async_wsrv(q)
+ queue_t *q;
+{
+ register u_char *cp, *wp;
+ register PAI *p;
+ register u_short fcs;
+ register mblk_t *mp, *m0;
+ mblk_t *cop, *outgoing;
+ int proto, len, olen, c;
+
+ p = (PAI *) q->q_ptr;
+
+ while ((mp = getq(q)) != NULL) {
+ /*
+ * we can only get M_DATA types into our Queue,
+ * due to our Put function
+ */
+ if (!canput(q->q_next)) {
+ putbq(q, mp);
+ return;
+ }
+
+ /* at least a header required */
+ len = msgdsize(mp);
+ if (len < PPP_HDRLEN
+ || (mp->b_wptr - mp->b_rptr < PPP_HDRLEN
+ && !pullupmsg(mp, PPP_HDRLEN))) {
+ freemsg(mp); /* discard the message */
+ DLOG("ppp_async: short message (%d)\n", len);
+ /* indicate output err */
+ putctl1(OTHERQ(q), M_CTL, IF_OUTPUT_ERROR);
+ continue;
+ }
+
+ /* Do address/control and protocol compression */
+ proto = (mp->b_rptr[2] << 8) + mp->b_rptr[3];
+ if (p->pai_flags & PAI_FLAGS_COMPAC && proto != PPP_LCP
+ && mp->b_rptr[0] == PPP_ALLSTATIONS && mp->b_rptr[1] == PPP_UI) {
+ mp->b_rptr += 2;
+ if (p->pai_flags & PAI_FLAGS_COMPPROT && proto < 0xff)
+ ++mp->b_rptr;
+ } else if (p->pai_flags & PAI_FLAGS_COMPPROT && proto < 0xff) {
+ mp->b_rptr[2] = mp->b_rptr[1];
+ mp->b_rptr[1] = mp->b_rptr[0];
+ ++mp->b_rptr;
+ }
+
+ m0 = mp; /* remember first message block */
+ fcs = PPP_INITFCS;
+
+ /*
+ * Estimate the required buffer length as 1.25 * message length
+ * to allow for escaped characters. If this isn't enough, we
+ * allocate another buffer later.
+ */
+ olen = len + (len >> 8) + 5;
+ if (olen < 32)
+ olen = 32;
+ else if (olen > 2048)
+ olen = 2048;
+ outgoing = cop = allocb(olen, BPRI_MED);
+ if (outgoing == NULL) {
+ DLOG("allocb(%d) failed!\n", olen);
+ /* should do something tricky here */
+ goto nobuffs;
+ }
+ wp = cop->b_wptr;
+
+ /* Put the initial flag in (we'll take it out later if we don't
+ need it). */
+ *wp++ = PPP_FLAG;
+ --olen;
+
+#define SPECIAL(p, c) (p->pai_asyncmap[(c) >> 5] & (1 << ((c) & 0x1F)))
+
+ /*
+ * Copy the message to the output block, escaping characters
+ * as needed.
+ */
+ while (mp) {
+ for (cp = mp->b_rptr; cp < mp->b_wptr; ) {
+ c = *cp++;
+ if (olen < 2) {
+ /* grab another message block and put it on the end */
+ cop->b_wptr = wp;
+ olen = 256;
+ cop = allocb(olen, BPRI_MED);
+ if (cop == NULL)
+ goto nobuffs;
+ linkb(outgoing, cop);
+ wp = cop->b_wptr;
+ }
+ if (SPECIAL(p, c)) {
+ *wp++ = PPP_ESCAPE;
+ *wp++ = c ^ PPP_TRANS;
+ olen -= 2;
+ } else {
+ *wp++ = c;
+ --olen;
+ }
+ fcs = PPP_FCS(fcs, c);
+ }
+ mp = mp->b_cont; /* look at the next block */
+ } /* end while(mp) */
+
+ /*
+ * Add the FCS and the trailing flag.
+ */
+ if (olen < 5) {
+ /* grab another message block for FCS and trailing flag */
+ cop->b_wptr = wp;
+ cop = allocb(5, BPRI_MED);
+ if (cop == NULL)
+ goto nobuffs;
+ linkb(outgoing, cop);
+ wp = cop->b_wptr;
+ }
+ fcs ^= 0xffff; /* XOR the resulting FCS */
+ c = fcs & 0xff;
+ if (SPECIAL(p, c)) {
+ *wp++ = PPP_ESCAPE;
+ *wp++ = c ^ PPP_TRANS;
+ } else
+ *wp++ = c;
+ c = fcs >> 8;
+ if (SPECIAL(p, c)) {
+ *wp++ = PPP_ESCAPE;
+ *wp++ = c ^ PPP_TRANS;
+ } else
+ *wp++ = c;
+ *wp++ = PPP_FLAG; /* add trailing PPP_FLAG */
+
+ cop->b_wptr = wp;
+ freemsg(m0);
+
+ /*
+ * now we check to see if the lower queue has entries, if so,
+ * we assume that we don't need a leading PPP_FLAG because
+ * these packets will be sent back to back.
+ */
+ if (qsize(q->q_next) > 0) {
+ /* entries in next queue, remove the leading PPP_FLAG */
+ ++outgoing->b_rptr;
+ }
+
+#if DEBUGS
+ if (p->pai_flags & PAI_FLAGS_LOG_OUTPKT)
+ ppp_dump_frame(p, outgoing, " sent output");
+#endif
+ putnext(q, outgoing);
+ continue;
+
+ nobuffs: /* well, we ran out of memory somewhere */
+ if (outgoing)
+ freemsg(outgoing); /* throw away what we have already */
+ putbq(q, m0); /* put back the original message */
+ putctl1(OTHERQ(q), M_CTL, IF_OUTPUT_ERROR);
+ qenable(q); /* reschedule ourselves for later */
+ return;
+ } /* end while(getq()) */
+} /* end function */
+
+static int
+ppp_async_rput(q, mp)
+ queue_t *q;
+ register mblk_t *mp;
+{
+ switch (mp->b_datap->db_type) {
+
+ case M_FLUSH:
+ if(*mp->b_rptr & FLUSHR)
+ flushq(q, FLUSHDATA);
+ putnext(q, mp); /* send it along too */
+ break;
+
+ case M_DATA:
+ putq(q, mp); /* queue it for my service routine */
+ break;
+
+ default:
+ putnext(q,mp); /* don't know what to do with this, so send it along */
+ }
+}
+
+static u_long paritytab[8] = {
+ 0x96696996, 0x69969669, 0x69969669, 0x96696996,
+ 0x69969669, 0x96696996, 0x96696996, 0x69969669,
+};
+
+static int
+ppp_async_rsrv(q)
+ queue_t *q;
+{
+ register mblk_t *mp, *bp;
+ register PAI *p;
+ register u_char *cp,c;
+ mblk_t *m0;
+ register u_char *wptr;
+ int bcount;
+
+ p = (PAI *) q->q_ptr;
+
+#define INPUT_ERROR(q) putctl1(q, M_CTL, IF_INPUT_ERROR)
+#define STUFF_CHAR(p,c) (*wptr++ = (c), (p)->pai_buffcount++)
+#define FLUSHEM(q, p) (INPUT_ERROR(q), (p)->pai_flags |= PAI_FLAGS_FLUSH)
+
+ while ((mp = getq(q)) != NULL) {
+ /* we can only get M_DATA types into our Queue,
+ due to our Put function */
+ if (!canput(q->q_next)) {
+ putbq(q, mp);
+ return;
+ }
+ m0 = mp; /* remember first message block */
+ for (; mp != NULL; mp = mp->b_cont) { /* for each message block */
+ cp = mp->b_rptr;
+ while (cp < mp->b_wptr) {
+ c = *cp++;
+
+ /* Accumulate info to help with detecting
+ non 8-bit clean links. */
+ if (c & 0x80)
+ p->pai_flags |= PAI_FLAGS_B7_1;
+ else
+ p->pai_flags |= PAI_FLAGS_B7_0;
+ if (paritytab[c >> 5] & (1 << (c & 0x1F)))
+ p->pai_flags |= PAI_FLAGS_PAR_ODD;
+ else
+ p->pai_flags |= PAI_FLAGS_PAR_EVEN;
+
+ /* Throw out chars in the receive asyncmap. */
+ if (c < 0x20 && (p->pai_rasyncmap & (1 << c)))
+ continue;
+
+ /* A flag marks the end of a frame. */
+ if (c == PPP_FLAG) {
+ bp = p->pai_buffer;
+ bcount = p->pai_buffcount;
+ p->pai_buffer = NULL;
+ p->pai_buffcount = 0;
+
+ /* if the escape indicator is set, then we have
+ seen the packet abort sequence "}~". */
+ if (p->pai_flags & (PAI_FLAGS_ESCAPED | PAI_FLAGS_FLUSH)) {
+ if ((p->pai_flags & PAI_FLAGS_FLUSH) == 0)
+ DLOG("ppp_async: packet abort\n", 0);
+ p->pai_flags &= ~(PAI_FLAGS_ESCAPED | PAI_FLAGS_FLUSH);
+ if (bp)
+ freemsg(bp);
+ continue;
+ }
+
+ if (bcount > PPP_FCSLEN) { /* discard FCS */
+ adjmsg(bp, -PPP_FCSLEN);
+ bcount -= PPP_FCSLEN;
+ }
+
+ if (bcount < PPP_HDRLEN) {
+ if (bcount) {
+ INPUT_ERROR(q);
+ DLOG("ppp_async: short input packet (%d)\n",
+ bcount);
+ }
+ if (bp)
+ freemsg(bp);
+ continue;
+ }
+
+ if (bp) {
+ if (p->pai_fcs == PPP_GOODFCS) {
+#if DEBUGS
+ if (p->pai_flags & PAI_FLAGS_LOG_INPKT)
+ ppp_dump_frame(p, bp, " got input");
+#endif /*DEBUGS*/
+ putnext(q, bp);
+ }
+ else {
+ INPUT_ERROR(q);
+ freemsg(bp);
+ DLOG("ppp_async: FCS Error\n", 0);
+ }
+ }
+ continue;
+ }
+
+ /* here c != PPP_FLAG */
+ if (p->pai_flags & PAI_FLAGS_FLUSH) {
+ while (cp < mp->b_wptr && *cp != PPP_FLAG)
+ ++cp;
+ continue;
+ }
+
+ if (p->pai_flags & PAI_FLAGS_ESCAPED) {
+ p->pai_flags &= ~PAI_FLAGS_ESCAPED; /* clear esc flag */
+ c ^= PPP_TRANS;
+ } else if (c == PPP_ESCAPE) {
+ if (cp >= mp->b_wptr || (c = *cp) == PPP_FLAG
+ || c < 0x20 && (p->pai_rasyncmap & (1 << c))) {
+ p->pai_flags |= PAI_FLAGS_ESCAPED;
+ continue;
+ }
+ c ^= PPP_TRANS;
+ ++cp;
+ }
+
+ /* here we check to see if we have a buffer.
+ If we don't, we assume that this is the first char
+ for the buffer, and we allocb one */
+
+ if (!p->pai_buffer) {
+ /* we allocate buffer chains in blocks of ALLOCBSIZE */
+
+ if (!(p->pai_buffer = allocb(ALLOCBSIZE, BPRI_MED))) {
+ FLUSHEM(q, p);
+ continue;
+ /* if we don't get a buffer, is there some way
+ to recover and requeue later? rather than flushing
+ the current packet... ? */
+ }
+ p->pai_bufftail = p->pai_buffer;
+ }
+ wptr = p->pai_bufftail->b_wptr;
+
+ if (!p->pai_buffcount) {
+ p->pai_fcs = PPP_INITFCS;
+ if (c != PPP_ALLSTATIONS) {
+ if (p->pai_flags & PAI_FLAGS_RCV_COMPAC) {
+ STUFF_CHAR(p, PPP_ALLSTATIONS);
+ STUFF_CHAR(p, PPP_UI);
+ }
+ else {
+ DLOG("ppp_async: missed ALLSTATIONS (0xff), got 0x%x\n", c);
+ FLUSHEM(q, p);
+ continue;
+ }
+ }
+ } /* end if !p->pai_buffcount */
+
+ if (p->pai_buffcount == 1 && c != PPP_UI) {
+ DLOG("ppp_async: missed UI (0x3), got 0x%x\n", c);
+ FLUSHEM(q,p);
+ continue;
+ }
+
+ if (p->pai_buffcount == 2 && (c & 1) == 1) {
+ if (p->pai_flags & PAI_FLAGS_RCV_COMPPROT)
+ STUFF_CHAR(p, 0);
+ else {
+ DLOG("ppp_async: bad protocol high byte %x\n", c);
+ FLUSHEM(q, p);
+ continue;
+ }
+ }
+
+ if (p->pai_buffcount == 3 && (c & 1) == 0) {
+ DLOG("ppp_async: bad protocol low byte %x\n", c);
+ FLUSHEM(q, p);
+ continue;
+ }
+
+ if (p->pai_buffcount >= p->pai_buffsize) { /* overrun */
+ DLOG("ppp_async: too many chars in input buffer %d\n",
+ p->pai_buffcount);
+ FLUSHEM(q, p);
+ continue;
+ }
+
+ /* determine if we have enough space in the buffer */
+ if (wptr >= p->pai_bufftail->b_datap->db_lim) {
+ p->pai_bufftail->b_wptr = wptr;
+ if (!(p->pai_bufftail = allocb(ALLOCBSIZE, BPRI_MED))) {
+ DLOG("ppp_async: couldn't get buffer for tail\n", 0);
+ FLUSHEM(q, p); /* discard all of it */
+ continue;
+ }
+ linkb(p->pai_buffer, p->pai_bufftail);
+ wptr = p->pai_bufftail->b_wptr;
+ }
+
+ STUFF_CHAR(p, c);
+ p->pai_fcs = PPP_FCS(p->pai_fcs, c);
+ while (cp < mp->b_wptr
+ && wptr < p->pai_bufftail->b_datap->db_lim
+ && (c = *cp) != PPP_FLAG && c != PPP_ESCAPE) {
+ if (c >= 0x20 || (p->pai_rasyncmap & (1 << c)) == 0) {
+ STUFF_CHAR(p, c);
+ p->pai_fcs = PPP_FCS(p->pai_fcs, c);
+ }
+ ++cp;
+ }
+ p->pai_bufftail->b_wptr = wptr;
+
+ } /* end while cp < wptr */
+ } /* end for each block */
+ /* discard this message now */
+ freemsg(m0);
+ } /* end while getq */
+
+}
+
+#if DEBUGS
+/*
+ * here is where we will dump out a frame in hex using the log()
+ * function if ppp_async_input_debug is non-zero. As this function is
+ * a pig, we only print up to the number of bytes specified by the value of
+ * the ppp_async_max_dump_bytes variable so as to not cause too many
+ * timeouts. <gmc@quotron.com>
+ */
+
+static void
+ppp_dump_frame(p, mptr, msg)
+ register PAI *p;
+ register mblk_t *mptr;
+ char *msg;
+{
+ register u_char *rptr;
+ register u_int i, mlen, frame_length;
+ char buf[2*MAX_DUMP_BYTES+4]; /* tmp buffer */
+ char *bp = buf;
+ static char digits[] = "0123456789abcdef";
+
+ frame_length = i = msgdsize(mptr);
+ bsdlog(LOG_INFO, "ppp_async%d:%s frame of %d bytes\n", p - pai,
+ msg, frame_length);
+ rptr = mptr->b_rptr; /* get pointer to beginning */
+ mlen = mptr->b_wptr - rptr; /* get length of this dblock */
+
+ /* only dump up to MAX_DUMP_BYTES */
+ if (i > ppp_async_max_dump_bytes)
+ i = ppp_async_max_dump_bytes;
+
+ while (i--) { /* convert to ascii hex */
+ while (mlen == 0) { /* get next dblock */
+ mptr = mptr->b_cont;
+ if (mptr) { /* are we done? */
+ rptr = mptr->b_rptr; /* nope, get next dblock */
+ mlen = mptr->b_wptr - rptr;
+ }
+ else { /* no more dblocks */
+ if (i != 0)
+ bsdlog(LOG_ERR, "ppp_async: ran out of data! (this shouldn't happen\n");
+ break;
+ }
+ }
+ --mlen;
+ *bp++ = digits[*rptr >> 4]; /* convert byte to ascii hex */
+ *bp++ = digits[*rptr++ & 0xf];
+ }
+
+ /* add a '>' to show that frame was truncated*/
+ if (ppp_async_max_dump_bytes < frame_length)
+ *bp++ = '>';
+ *bp = 0;
+ bsdlog(LOG_INFO,"ppp_async: %s\n", buf);
+}
+#endif /* DEBUGS */
+
+#endif /* NUM_PPP > 0 */
--- /dev/null
+/*
+ * ppp_comp.c - STREAMS module for kernel-level CCP support.
+ *
+ * Copyright (c) 1994 The Australian National University.
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation is hereby granted, provided that the above copyright
+ * notice appears in all copies. This software is provided without any
+ * warranty, express or implied. The Australian National University
+ * makes no representations about the suitability of this software for
+ * any purpose.
+ *
+ * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
+ * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
+ * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
+ * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
+ * OR MODIFICATIONS.
+ *
+ * $Id: ppp_comp.c,v 1.1 1994/12/05 00:29:21 paulus Exp $
+ */
+
+#include <net/net_globals.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/errno.h>
+#include <sys/user.h>
+#include <sys/stream.h>
+#include <sys/stropts.h>
+#include <sys/strconf.h>
+#include <sys/device.h>
+#include <sys/syslog.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include <net/ppp_defs.h>
+#include <net/ppp_str.h>
+
+#define PACKETPTR mblk_t *
+#include <net/ppp-comp.h>
+
+static int ppp_comp_open(), ppp_comp_close();
+static int ppp_comp_rput(), ppp_comp_wput();
+static void ppp_comp_ccp();
+
+static struct module_info minfo = {
+ 0xbadf, "ppp_compress", 0, INFPSZ, 16384, 4096,
+};
+
+static struct qinit r_init = {
+ ppp_comp_rput, NULL, ppp_comp_open, ppp_comp_close,
+ NULL, &minfo, NULL
+};
+
+static struct qinit w_init = {
+ ppp_comp_wput, NULL, NULL, NULL, NULL, &minfo, NULL
+};
+
+struct streamtab ppp_compinfo = {
+ &r_init, &w_init, NULL, NULL
+};
+
+struct ppp_comp_state {
+ int ccp_state;
+ int debug;
+ int mru;
+ struct compressor *xcomp;
+ void *xstate;
+ struct compressor *rcomp;
+ void *rstate;
+};
+
+/* Bits in ccp_state are as defined in ppp_str.h. */
+#define CCP_ERR (CCP_ERROR | CCP_FATALERROR)
+
+/*
+ * List of compressors we know about.
+ */
+
+extern struct compressor ppp_bsd_compress;
+
+struct compressor *ppp_compressors[] = {
+ &ppp_bsd_compress,
+ NULL
+};
+
+strconf_t pppcompconf = {
+ "pppcomp", &ppp_compinfo, STR_NEW_OPEN, 0, SQLVL_DEFAULT, (void *) 0
+};
+
+int pppcomp_load(int cmd, struct uio *uiop)
+{
+ int rc = 0;
+
+ switch (cmd) {
+ case CFG_INIT:
+ rc = str_install(STR_LOAD_MOD, &pppcompconf);
+ break;
+ case CFG_TERM:
+ rc = str_install(STR_UNLOAD_MOD, &pppcompconf);
+ break;
+ default:
+ rc = EINVAL;
+ break;
+ }
+ return(rc);
+}
+
+static int
+ppp_comp_open(q, dev, flag, sflag)
+ queue_t *q;
+ dev_t dev;
+ int flag;
+ int sflag;
+{
+ struct ppp_comp_state *cp;
+
+ if (q->q_ptr == NULL) {
+ cp = (struct ppp_comp_state *)
+ xmalloc(sizeof(struct ppp_comp_state), 0, pinned_heap);
+ if (cp == NULL) {
+ return(ENOSR);
+ }
+ bzero(cp, sizeof(struct ppp_comp_state));
+ OTHERQ(q)->q_ptr = q->q_ptr = (caddr_t) cp;
+ cp->ccp_state = 0;
+ cp->debug = 0;
+ cp->mru = PPP_MRU;
+ cp->xstate = NULL;
+ cp->rstate = NULL;
+ }
+ return 0;
+}
+
+static int
+ppp_comp_close(q)
+ queue_t *q;
+{
+ struct ppp_comp_state *cp;
+
+ cp = (struct ppp_comp_state *) q->q_ptr;
+ if (cp != NULL) {
+ if (cp->xstate != NULL)
+ (*cp->xcomp->comp_free)(cp->xstate);
+ if (cp->rstate != NULL)
+ (*cp->rcomp->decomp_free)(cp->rstate);
+ xmfree(cp, pinned_heap);
+ q->q_ptr = NULL;
+ OTHERQ(q)->q_ptr = NULL;
+ }
+ return 0;
+}
+
+static int
+ppp_comp_wput(q, mp)
+ queue_t *q;
+ mblk_t *mp;
+{
+ struct iocblk *iop;
+ struct ppp_comp_state *cp;
+ mblk_t *cmp;
+ int error, len, proto, state;
+ struct ppp_option_data *odp;
+ struct compressor **comp;
+
+ cp = (struct ppp_comp_state *) q->q_ptr;
+ switch (mp->b_datap->db_type) {
+
+ case M_DATA:
+ /* first find out what the protocol is */
+ if (mp->b_wptr - mp->b_rptr >= PPP_HDRLEN
+ || pullupmsg(mp, PPP_HDRLEN)) {
+ proto = PPP_PROTOCOL(mp->b_rptr);
+ if (proto == PPP_CCP)
+ ppp_comp_ccp(q, mp, 0);
+ else if (proto != PPP_LCP && (cp->ccp_state & CCP_COMP_RUN)
+ && cp->xstate != NULL) {
+ len = msgdsize(mp);
+ (*cp->xcomp->compress)(cp->xstate, &cmp, mp, len,
+ (cp->ccp_state & CCP_ISUP? len: 0));
+ /* XXX we really want the MTU here, not len */
+ if (cmp != NULL) {
+ freemsg(mp);
+ mp = cmp;
+ }
+ }
+ }
+ putnext(q, mp);
+ break;
+
+ case M_IOCTL:
+ iop = (struct iocblk *) mp->b_rptr;
+ error = -1;
+ switch ((unsigned int)iop->ioc_cmd) {
+
+ case SIOCSIFCOMP:
+ /* set CCP state */
+ if ((iop->ioc_count != sizeof(int)) &&
+ (iop->ioc_count != TRANSPARENT)) {
+ error = EINVAL;
+ break;
+ }
+ state = (*(int *) mp->b_cont->b_rptr) & (CCP_ISUP | CCP_ISOPEN);
+ if ((state & CCP_ISOPEN) == 0) {
+ if (cp->xstate != NULL) {
+ (*cp->xcomp->comp_free)(cp->xstate);
+ cp->xstate = NULL;
+ }
+ if (cp->rstate != NULL) {
+ (*cp->rcomp->decomp_free)(cp->rstate);
+ cp->rstate = NULL;
+ }
+ cp->ccp_state = 0;
+ } else {
+ cp->ccp_state = (cp->ccp_state & ~CCP_ISUP) | state;
+ }
+ if (cp->debug)
+ bsdlog(LOG_INFO, "SIOCSIFCOMP %x, state = %x\n",
+ *(int *) mp->b_cont->b_rptr, cp->ccp_state);
+ error = 0;
+ iop->ioc_count = 0;
+ break;
+
+ case SIOCGIFCOMP:
+ if ((mp->b_cont = allocb(sizeof(int), BPRI_MED)) == NULL) {
+ error = ENOSR;
+ break;
+ }
+ *(int *)mp->b_cont->b_wptr = cp->ccp_state;
+ mp->b_cont->b_wptr += iop->ioc_count = sizeof(int);
+ break;
+
+ case SIOCSCOMPRESS:
+ error = EINVAL;
+ if (iop->ioc_count != TRANSPARENT)
+ break;
+ odp = *((struct ppp_option_data **) mp->b_cont->b_rptr);
+ len = sizeof(odp->opt_data);
+ if (len > odp->length)
+ len = odp->length;
+ if (odp->opt_data[1] < 2 || odp->opt_data[1] > len)
+ break;
+ for (comp = ppp_compressors; *comp != NULL; ++comp)
+ if ((*comp)->compress_proto == odp->opt_data[0]) {
+ /* here's the handler! */
+ error = 0;
+ if (odp->transmit) {
+ if (cp->xstate != NULL)
+ (*cp->xcomp->comp_free)(cp->xstate);
+ cp->xcomp = *comp;
+ cp->xstate = (*comp)->comp_alloc(odp->opt_data, len);
+ if (cp->xstate == NULL)
+ error = ENOSR;
+ } else {
+ if (cp->rstate != NULL)
+ (*cp->rcomp->decomp_free)(cp->rstate);
+ cp->rcomp = *comp;
+ cp->rstate = (*comp)->decomp_alloc(odp->opt_data, len);
+ if (cp->rstate == NULL)
+ error = ENOSR;
+ }
+ if (cp->debug)
+ bsdlog(LOG_INFO, "SIOCSCOMPRESS %s len=%d\n",
+ odp->transmit? "xmit": "recv", len);
+ break;
+ }
+ iop->ioc_count = 0;
+ break;
+
+ case SIOCSIFDEBUG:
+ /* set our debug flag from this */
+ if ((iop->ioc_count == TRANSPARENT) ||
+ (iop->ioc_count == sizeof(int))) {
+ cp->debug = *(int *) mp->b_cont->b_rptr & 1;
+ }
+ break;
+
+ case SIOCSIFMRU:
+ /* remember this value */
+ if ((iop->ioc_count == TRANSPARENT) ||
+ (iop->ioc_count == sizeof(int))) {
+ cp->mru = *(int *) mp->b_cont->b_rptr;
+ }
+ break;
+
+ }
+
+ if (error < 0)
+ putnext(q, mp);
+ else if (error == 0) {
+ mp->b_datap->db_type = M_IOCACK;
+ qreply(q, mp);
+ } else {
+ mp->b_datap->db_type = M_IOCNAK;
+ iop->ioc_count = 0;
+ qreply(q, mp);
+ }
+ break;
+
+ default:
+ putnext(q, mp);
+ }
+}
+
+static int
+ppp_comp_rput(q, mp)
+ queue_t *q;
+ mblk_t *mp;
+{
+ int proto, rv;
+ mblk_t *dmp;
+ struct ppp_comp_state *cp;
+
+ cp = (struct ppp_comp_state *) q->q_ptr;
+ switch (mp->b_datap->db_type) {
+
+ case M_DATA:
+ /* possibly a compressed packet to decompress,
+ or a CCP packet to take notice of. */
+ if (mp->b_wptr - mp->b_rptr >= PPP_HDRLEN
+ || pullupmsg(mp, PPP_HDRLEN)) {
+ proto = PPP_PROTOCOL(mp->b_rptr);
+ if (proto == PPP_CCP)
+ ppp_comp_ccp(q, mp, 1);
+ else if (proto == PPP_COMP) {
+ if ((cp->ccp_state & CCP_ISUP)
+ && (cp->ccp_state & CCP_DECOMP_RUN) && cp->rstate
+ && (cp->ccp_state & CCP_ERR) == 0) {
+ rv = (*cp->rcomp->decompress)(cp->rstate, mp, &dmp);
+ if (dmp != NULL) {
+ freemsg(mp);
+ mp = dmp;
+ } else {
+ switch (rv) {
+ case DECOMP_OK:
+ /* no error, but no packet returned */
+ freemsg(mp);
+ mp = NULL;
+ break;
+ case DECOMP_ERROR:
+ cp->ccp_state |= CCP_ERROR;
+ break;
+ case DECOMP_FATALERROR:
+ cp->ccp_state |= CCP_FATALERROR;
+ break;
+ }
+ }
+ }
+ } else if (cp->rstate && (cp->ccp_state & CCP_DECOMP_RUN)) {
+ (*cp->rcomp->incomp)(cp->rstate, mp);
+ }
+ }
+ if (mp != NULL)
+ putnext(q, mp);
+ break;
+
+ default:
+ putnext(q, mp);
+ }
+}
+
+static void
+ppp_comp_ccp(q, mp, rcvd)
+ queue_t *q;
+ mblk_t *mp;
+ int rcvd;
+{
+ int len, clen;
+ struct ppp_comp_state *cp;
+ unsigned char *dp;
+
+ len = msgdsize(mp);
+ if (len < PPP_HDRLEN + CCP_HDRLEN || !pullupmsg(mp, len))
+ return;
+ cp = (struct ppp_comp_state *) q->q_ptr;
+ dp = mp->b_rptr + PPP_HDRLEN;
+ len -= PPP_HDRLEN;
+ clen = CCP_LENGTH(dp);
+ if (clen > len)
+ return;
+ if (cp->debug)
+ bsdlog(LOG_INFO, "CCP %s: code=%x len=%d\n", rcvd? "rcvd": "sent",
+ CCP_CODE(dp), clen);
+
+ switch (CCP_CODE(dp)) {
+ case CCP_CONFREQ:
+ case CCP_TERMREQ:
+ case CCP_TERMACK:
+ cp->ccp_state &= ~CCP_ISUP;
+ break;
+
+ case CCP_CONFACK:
+ if ((cp->ccp_state & (CCP_ISOPEN | CCP_ISUP)) == CCP_ISOPEN
+ && clen >= CCP_HDRLEN + CCP_OPT_MINLEN
+ && clen >= CCP_HDRLEN + CCP_OPT_LENGTH(dp + CCP_HDRLEN)) {
+ if (!rcvd) {
+ if (cp->xstate != NULL
+ && (*cp->xcomp->comp_init)
+ (cp->xstate, dp + CCP_HDRLEN, clen - CCP_HDRLEN,
+ 0, /* XXX: should be unit */
+ cp->debug))
+ cp->ccp_state |= CCP_COMP_RUN;
+ } else {
+ if (cp->rstate != NULL
+ && (*cp->rcomp->decomp_init)
+ (cp->rstate, dp + CCP_HDRLEN, clen - CCP_HDRLEN,
+ 0/* unit */, cp->mru, cp->debug))
+ cp->ccp_state = (cp->ccp_state & ~CCP_ERR)
+ | CCP_DECOMP_RUN;
+ }
+ }
+ break;
+
+ case CCP_RESETACK:
+ if (cp->ccp_state & CCP_ISUP) {
+ if (!rcvd) {
+ if (cp->xstate && (cp->ccp_state & CCP_COMP_RUN))
+ (*cp->xcomp->comp_reset)(cp->xstate);
+ } else {
+ if (cp->rstate && (cp->ccp_state & CCP_DECOMP_RUN)) {
+ (*cp->rcomp->decomp_reset)(cp->rstate);
+ cp->ccp_state &= ~CCP_ERROR;
+ }
+ }
+ }
+ break;
+ }
+
+ if (cp->debug)
+ bsdlog(LOG_INFO, "ccp_state = %x\n", cp->ccp_state);
+}
--- /dev/null
+/*
+ ppp_if.c - Streams PPP interface module
+
+ top level module handles if_ and packetizing PPP packets.
+
+ Copyright (C) 1990 Brad K. Clements, All Rights Reserved
+ See copyright notice in NOTES
+
+*/
+
+#define VJC 1
+#include <sys/types.h>
+
+#ifndef PPP_VD
+#include "ppp.h"
+#endif
+
+#if NUM_PPP > 0
+
+#define STREAMS 1
+
+#define PPP_STATS 1 /* keep statistics */
+#define DEBUGS 1
+
+#include <net/net_globals.h>
+#include <sys/param.h>
+#include <sys/stream.h>
+#include <sys/stropts.h>
+#include <sys/strconf.h>
+
+#include <sys/device.h>
+/*
+#include <sys/user.h>
+*/
+/*
+#include <sys/systm.h>
+*/
+#include <sys/mbuf.h>
+#include <sys/socket.h>
+#include <sys/errno.h>
+#include <sys/ioctl.h>
+#include <sys/file.h>
+#include <sys/uio.h>
+#include <net/if.h>
+#include <net/route.h>
+#include <net/netisr.h>
+#include <netinet/in.h>
+#include <netinet/in_var.h>
+#define _NETINET_IN_SYSTM_H_
+typedef u_long n_long;
+#include <netinet/ip.h>
+
+#include <net/ppp_defs.h>
+#include <net/ppp_str.h>
+
+#ifdef VJC
+#undef SPECIAL_I
+#include <net/vjcompress.h>
+#endif
+
+#ifdef PPP_STATS
+#define INCR(comp) ++p->pii_stats.comp
+#else
+#define INCR(comp)
+#endif
+
+#define MAX_PKTSIZE 4096 /* max packet size including framing */
+#define PPP_FRAMING 6 /* 4-byte header + 2-byte FCS */
+#define MAX_IPHDR 128 /* max TCP/IP header size */
+#define MAX_VJHDR 20 /* max VJ compressed header size (?) */
+
+/*
+ * Network protocols we support.
+ */
+#define NP_IP 0
+#define NUM_NP 1 /* # protocols supported */
+
+/*
+ * Structure used within the ppp_if streams module.
+ */
+struct ppp_if_info {
+ int pii_flags;
+ struct ifnet pii_ifnet;
+ queue_t *pii_writeq; /* used by ppp_output */
+ enum NPmode pii_npmode[NUM_NP];
+ mblk_t *pii_npq; /* list of packets queued up */
+ mblk_t **pii_npq_tail;
+#ifdef VJC
+ struct vjcompress pii_sc_comp; /* vjc control buffer */
+#endif
+#ifdef PPP_STATS
+ struct pppstat pii_stats;
+#endif
+};
+
+/*
+ * Values for pii_flags.
+ */
+#define PII_FLAGS_INUSE 0x1 /* in use by a stream */
+#define PII_FLAGS_ATTACHED 0x8 /* already if_attached */
+#define PII_FLAGS_VJC_ON 0x10 /* VJ TCP header compression enabled */
+#define PII_FLAGS_VJC_NOCCID 0x20 /* VJ: don't compress conn. id */
+#define PII_FLAGS_VJC_REJ 0x40 /* receive: reject VJ comp */
+#define PII_FLAGS_DEBUG 0x80 /* enable debug printout */
+
+#ifdef DEBUGS
+#include <sys/syslog.h>
+#define DLOG(s,a) if (p->pii_flags&PII_FLAGS_DEBUG) bsdlog(LOG_INFO, s, a)
+#else
+#define DLOG(s) {}
+#endif
+
+#ifdef PPP_SNIT
+#include <net/nit_if.h>
+#include <netinet/if_ether.h>
+/* Use a fake link level header to make etherfind and tcpdump happy. */
+static struct ether_header header = {{1}, {2}, ETHERTYPE_IP};
+static struct nit_if nif = {(caddr_t)&header, sizeof(header), 0, 0};
+#endif
+
+static int ppp_if_open(), ppp_if_close(), ppp_if_rput(), ppp_if_wput(),
+ ppp_if_wsrv(), ppp_if_rsrv();
+
+static struct module_info minfo ={
+ 0xbad,"ppp_if",0, INFPSZ, 16384, 4096
+};
+
+static struct qinit r_init = {
+ ppp_if_rput, ppp_if_rsrv, ppp_if_open, ppp_if_close, NULL, &minfo, NULL
+};
+static struct qinit w_init = {
+ ppp_if_wput, ppp_if_wsrv, ppp_if_open, ppp_if_close, NULL, &minfo, NULL
+};
+struct streamtab ppp_ifinfo = {
+ &r_init, &w_init, NULL, NULL
+};
+
+typedef struct ppp_if_info PII;
+
+PII *pii;
+
+int ppp_output(), ppp_ioctl();
+static void if_release_addrs(), if_delete_route();
+
+strconf_t pppconf = {
+ "pppif", &ppp_ifinfo, STR_NEW_OPEN, 0, SQLVL_DEFAULT, (void *) 0
+};
+
+int ppp_load(int cmd, struct uio *uiop)
+{
+ int rc = 0;
+
+ switch (cmd) {
+ case CFG_INIT:
+ rc = str_install(STR_LOAD_MOD, &pppconf);
+ break;
+ case CFG_TERM:
+ rc = str_install(STR_UNLOAD_MOD, &pppconf);
+ break;
+ default:
+ rc = EINVAL;
+ break;
+ }
+ if ((rc == 0) && !(pii = xmalloc(sizeof(PII) * NUM_PPP, 0, pinned_heap)))
+ rc = ENOMEM;
+ else
+ bzero(pii, sizeof(PII) * NUM_PPP);
+
+ return(rc);
+}
+
+int
+ppp_attach(unit)
+ int unit;
+{
+ register struct ifnet *ifp = &pii[unit].pii_ifnet;
+
+ ifp->if_name = "ppp";
+ ifp->if_type = IFT_PTPSERIAL;
+ ifp->if_mtu = PPP_MTU;
+ ifp->if_flags = IFF_POINTOPOINT;
+ ifp->if_unit = unit;
+ ifp->if_ioctl = ppp_ioctl;
+ ifp->if_output = ppp_output;
+ ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
+ if_attach(ifp);
+ if_nostat(ifp);
+ pii[unit].pii_flags |= PII_FLAGS_ATTACHED;
+}
+
+
+int
+ppp_unattach(unit)
+ int unit;
+{
+ struct ifnet *ifp = &pii[unit].pii_ifnet;
+ struct ifnet **p;
+ int s;
+
+ if (!(pii[unit].pii_flags & PII_FLAGS_ATTACHED))
+ return 0;
+
+ /* remove interface from interface list */
+ for (p = &ifp; *p; p = &((*p)->if_next)) {
+ if (*p == ifp) {
+ *p = (*p)->if_next;
+
+ /* mark it down and flush it's que */
+ if_down(ifp);
+
+ /* free any addresses hanging off the intf */
+ if_release_addrs(ifp);
+
+ pii[unit].pii_flags &= ~PII_FLAGS_ATTACHED;
+
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+
+static void
+if_release_addrs(ifp)
+register struct ifnet *ifp;
+{
+ register struct in_ifaddr **addr;
+ register struct ifaddr *ifa, *ifanxt;
+ register int s;
+
+ if_delete_route(ifp);
+
+ for (addr = &in_ifaddr; *addr; ) {
+ if ((*addr)->ia_ifp == ifp)
+ *addr = (*addr)->ia_next;
+ else
+ addr = &((*addr)->ia_next);
+ }
+
+ /*
+ * Free all mbufs holding down this interface's address(es).
+ */
+ for (ifa = ifp->if_addrlist; ifa; ifa = ifanxt) {
+ ifanxt = ifa->ifa_next;
+ m_free(dtom(ifa));
+ }
+ ifp->if_addrlist = 0;
+}
+
+/*
+ * Delete routes to the specified interface.
+ * Hacked from rtrequest().
+ */
+static void
+if_delete_route(ifp)
+struct ifnet *ifp;
+{
+ extern int rttrash; /* routes not in table but not freed */
+ register struct mbuf **mprev, *m;
+ register struct rtentry *route;
+ register int i;
+
+ /* search host rt tbl */
+/*
+ for (i = 0; i < RTHASHSIZ; i++) {
+ mprev = &rthost[i];
+ while (m = *mprev) {
+ route = mtod(m, struct rtentry *);
+ if (route->rt_ifp == ifp) {
+ *mprev = m->m_next;
+ if (route->rt_refcnt > 0) {
+ route->rt_flags &= ~RTF_UP;
+ rttrash++;
+ m->m_next = 0;
+ } else {
+ m_free(m);
+ }
+ } else
+ mprev = &m->m_next;
+ }
+ }
+*/
+
+ /* search net rt tbl */
+/*
+ for (i = 0; i < RTHASHSIZ; i++) {
+ mprev = &rtnet[i];
+ while (m = *mprev) {
+ route = mtod(m, struct rtentry *);
+ if (route->rt_ifp == ifp) {
+ *mprev = m->m_next;
+ if (route->rt_refcnt > 0) {
+ route->rt_flags &= ~RTF_UP;
+ rttrash++;
+ m->m_next = 0;
+ } else {
+ m_free(m);
+ }
+ } else
+ mprev = &m->m_next;
+ }
+ }
+*/
+}
+
+int
+ppp_busy()
+{
+ int x;
+
+ for (x = 0; x < NUM_PPP; x++) {
+ if (pii[x].pii_flags & PII_FLAGS_INUSE)
+ return 1;
+ }
+ return 0;
+}
+
+static PII *
+ppp_if_alloc()
+{
+ int s, x;
+ PII *p;
+
+ for (x = 0; x < NUM_PPP; x++)
+ if (!(pii[x].pii_flags & PII_FLAGS_INUSE))
+ break;
+ if (x == NUM_PPP) { /* all buffers in use */
+ return NULL;
+ }
+ p = &pii[x];
+ p->pii_flags |= PII_FLAGS_INUSE;
+ return p;
+}
+
+static void
+ppp_if_init(q, p)
+ queue_t *q;
+ PII *p;
+{
+ int s, n;
+
+
+#ifdef VJC
+ vj_compress_init(&p->pii_sc_comp, -1);
+#endif
+#ifdef PPP_STATS
+ bzero(&p->pii_stats, sizeof(p->pii_stats));
+#endif
+ if (!(p->pii_flags & PII_FLAGS_ATTACHED))
+ ppp_attach(p - pii); /* attach it */
+ else
+ p->pii_ifnet.if_mtu = PPP_MTU;
+ p->pii_writeq = WR(q);
+ /* set write Q and read Q to point here */
+ WR(q)->q_ptr = q->q_ptr = (caddr_t) p;
+ p->pii_ifnet.if_flags |= IFF_RUNNING;
+ p->pii_flags &= PII_FLAGS_INUSE | PII_FLAGS_ATTACHED | PII_FLAGS_DEBUG;
+ for (n = 0; n < NUM_NP; ++n)
+ p->pii_npmode[n] = NPMODE_ERROR;
+ p->pii_npmode[NP_IP] = NPMODE_PASS; /* for backwards compatibility */
+ p->pii_npq = NULL;
+ p->pii_npq_tail = &p->pii_npq;
+
+ DLOG("ppp_if%d: init\n", p - pii);
+}
+
+static int
+ppp_if_open(q, dev, flag, sflag)
+ queue_t *q;
+ dev_t dev;
+ int flag, sflag;
+
+{
+ if (!suser()) {
+ return(EPERM);
+ }
+
+ return (0);
+}
+
+static int
+ppp_if_close(q)
+ queue_t *q; /* queue info */
+{
+ PII *p = (PII *) q->q_ptr;
+ int s, n;
+ mblk_t *mp, *mq;
+
+ if (p != NULL) {
+ if_down(&p->pii_ifnet);
+ p->pii_ifnet.if_flags &= ~IFF_RUNNING;
+ p->pii_flags &= ~PII_FLAGS_INUSE;
+ q->q_ptr = NULL;
+ for (mp = p->pii_npq; mp != NULL; mp = mq) {
+ mq = mp->b_next;
+ freemsg(mp);
+ }
+ p->pii_npq = NULL;
+ p->pii_npq_tail = &p->pii_npq;
+ DLOG("ppp_if%d: closed\n", p - pii);
+ }
+ return(0); /* no work to be done */
+}
+
+
+static int
+ppp_if_wput(q, mp)
+ queue_t *q;
+ register mblk_t *mp;
+{
+ register struct iocblk *i;
+ register PII *p;
+ int bits, flags, error, unit, s;
+ queue_t *oq;
+ int npix;
+ struct npioctl *npi;
+ mblk_t *mq, **mqnext;
+ struct ppp_stats *psp;
+
+ switch (mp->b_datap->db_type) {
+
+ case M_FLUSH:
+ if (*mp->b_rptr & FLUSHW)
+ flushq(q, FLUSHDATA);
+ putnext(q, mp); /* send it along too */
+ break;
+
+ case M_DATA:
+ putq(q, mp); /* queue it for my service routine */
+ break;
+
+ case M_IOCTL:
+ i = (struct iocblk *) mp->b_rptr;
+ p = (PII *) q->q_ptr;
+ switch ((unsigned int)i->ioc_cmd) {
+
+ case SIOCSIFVJCOMP: /* enable or disable VJ compression */
+#ifdef VJC
+ if (i->ioc_count == TRANSPARENT) {
+ bits = *(u_int *) mp->b_cont->b_rptr;
+ DLOG("ppp_if: SIFVJCOMP %d\n", bits);
+ if (bits & 1)
+ p->pii_flags |= PII_FLAGS_VJC_ON;
+ else
+ p->pii_flags &= ~PII_FLAGS_VJC_ON;
+ if (bits & 2)
+ p->pii_flags |= PII_FLAGS_VJC_NOCCID;
+ else
+ p->pii_flags &= ~PII_FLAGS_VJC_NOCCID;
+ if (bits & 4)
+ p->pii_flags |= PII_FLAGS_VJC_REJ;
+ else
+ p->pii_flags &= ~PII_FLAGS_VJC_REJ;
+ bits >>= 4; /* now max conn id. */
+ if (bits)
+ vj_compress_init(&p->pii_sc_comp, bits);
+ mp->b_datap->db_type = M_IOCACK;
+ i->ioc_count = 0;
+ qreply(q, mp);
+ break;
+ }
+#endif
+ putnext(q, mp);
+ break;
+
+ case SIOCGETU: /* get unit number */
+ /*
+ * Allocate a unit if we don't already have one.
+ */
+ error = 0;
+ if (p == (PII *) 0) {
+ p = ppp_if_alloc();
+ if (p == NULL)
+ error = ENOBUFS;
+ else
+ ppp_if_init(RD(q), p);
+ }
+ if (error == 0
+ && (mp->b_cont = allocb(sizeof(int), BPRI_MED)) == NULL)
+ error = ENOSR;
+ if (error == 0) {
+ *(int *) mp->b_cont->b_wptr = p->pii_ifnet.if_unit;
+ mp->b_cont->b_wptr += i->ioc_count = sizeof(int);
+ mp->b_datap->db_type = M_IOCACK;
+ } else {
+ i->ioc_error = error;
+ i->ioc_count = 0;
+ mp->b_datap->db_type = M_IOCNAK;
+ }
+ qreply(q,mp);
+ break;
+
+ case SIOCSETU: /* set unit number */
+ if ((i->ioc_count == sizeof(int)) ||
+ (i->ioc_count == TRANSPARENT)) {
+ unit = *(int *)mp->b_cont->b_rptr;
+ if (p != NULL || (unsigned) unit > NUM_PPP) {
+ mp->b_datap->db_type = M_IOCNAK;
+ i->ioc_error = EINVAL;
+ i->ioc_count = 0;
+ error = EINVAL;
+ } else {
+ p = &pii[unit];
+ if (p->pii_flags & PII_FLAGS_INUSE) {
+ oq = p->pii_writeq;
+ oq->q_ptr = RD(oq)->q_ptr = NULL;
+ q->q_ptr = RD(q)->q_ptr = (caddr_t) p;
+ p->pii_writeq = q;
+ } else {
+ ppp_if_init(RD(q), p);
+ }
+ mp->b_datap->db_type = M_IOCACK;
+ }
+ qreply(q, mp);
+ break;
+ }
+ putnext(q, mp);
+ break;
+
+ case SIOCSIFDEBUG :
+ /* catch it on the way past to set our debug flag as well */
+ if (i->ioc_count == TRANSPARENT) {
+ flags = *(int *)mp->b_cont->b_rptr;
+ if (flags & 1)
+ p->pii_flags |= PII_FLAGS_DEBUG;
+ else
+ p->pii_flags &= ~PII_FLAGS_DEBUG;
+ }
+ putnext(q, mp);
+ break;
+
+ case SIOCGETNPMODE:
+ case SIOCSETNPMODE:
+ if (i->ioc_count == TRANSPARENT && p != NULL) {
+ npi = *((struct npioctl **) mp->b_cont->b_rptr);
+ switch (npi->protocol) {
+ case PPP_IP:
+ npix = NP_IP;
+ break;
+ default:
+ npix = -1;
+ }
+ if (npix < 0) {
+ i->ioc_error = EAFNOSUPPORT;
+ i->ioc_count = 0;
+ mp->b_datap->db_type = M_IOCNAK;
+ qreply(q, mp);
+ break;
+ }
+ if (i->ioc_cmd == SIOCSETNPMODE) {
+ if (p->pii_npmode[npix] == NPMODE_QUEUE
+ && npi->mode != NPMODE_QUEUE) {
+ for (mqnext = &p->pii_npq; (mq = *mqnext) != NULL; ) {
+ if (PPP_PROTOCOL(mq->b_rptr) != npi->protocol){
+ mqnext = &mq->b_next;
+ continue;
+ }
+ *mqnext = mq->b_next;
+ if (npi->mode == NPMODE_PASS) {
+ putq(q, mq); /* q it for service routine */
+ } else {
+ freemsg(mq);
+ }
+ }
+ p->pii_npq_tail = mqnext;
+ }
+ p->pii_npmode[npix] = npi->mode;
+ i->ioc_count = 0;
+ } else
+ npi->mode = p->pii_npmode[npix];
+ mp->b_datap->db_type = M_IOCACK;
+ qreply(q, mp);
+ break;
+ }
+ putnext(q, mp);
+ break;
+
+ default: /* unknown IOCTL call */
+ putnext(q, mp); /* pass it along */
+ }
+ break;
+
+ default:
+ putnext(q, mp); /* don't know what to do with this, so send it along*/
+ }
+}
+
+static int
+ppp_if_wsrv(q)
+ queue_t *q;
+{
+ register mblk_t *mp;
+ register PII *p;
+
+ p = (PII *) q->q_ptr;
+
+ while ((mp = getq(q)) != NULL) {
+ /*
+ * we can only get M_DATA types into our Queue,
+ * due to our Put function
+ */
+ if (!canput(q->q_next)) {
+ putbq(q, mp);
+ return;
+ }
+
+ /* increment count of outgoing packets */
+ if (p != NULL)
+ INCR(ppp_opackets);
+
+ /* just pass it along, nothing to do in this direction */
+ putnext(q, mp);
+ } /* end while */
+}
+
+
+static int
+ppp_if_rput(q, mp)
+ queue_t *q;
+ register mblk_t *mp;
+{
+ register u_char c;
+ register PII *p;
+
+ switch (mp->b_datap->db_type) {
+
+ case M_FLUSH:
+ if (*mp->b_rptr & FLUSHR)
+ flushq(q, FLUSHDATA);
+ putnext(q, mp); /* send it along too */
+ break;
+
+ case M_DATA:
+ putq(q, mp); /* queue it for my service routine */
+ break;
+
+ case M_CTL:
+ p = (PII *) q->q_ptr;
+ if (p != NULL) {
+ c = *(u_char *) mp->b_rptr;
+ switch (c) {
+ case IF_INPUT_ERROR :
+ p->pii_ifnet.if_ierrors++;
+ INCR(ppp_ierrors);
+ DLOG("ppp_if: input error inc to %d\n",
+ p->pii_ifnet.if_ierrors);
+ break;
+ case IF_OUTPUT_ERROR :
+ p->pii_ifnet.if_oerrors++;
+ INCR(ppp_oerrors);
+ DLOG("ppp_if: output error inc to %d\n",
+ p->pii_ifnet.if_oerrors);
+ break;
+ }
+ }
+ putnext(q, mp); /* send it up to pppd */
+ break;
+
+ default:
+ putnext(q, mp); /* send along other message types */
+ }
+}
+
+static int
+ppp_if_rsrv(q)
+ queue_t *q;
+{
+ register mblk_t *mp,*m0;
+#ifdef VJC
+ register mblk_t *mvjc;
+ unsigned char *cp, *iphdr;
+ u_int hlen;
+#endif
+ register PII *p;
+ struct mbuf *mb1, *mb2, *mbtail;
+ struct ifnet *ifp;
+ int len, xlen, count, s, pklen;
+ u_char *rptr;
+ int address, control;
+
+ p = (PII *) q->q_ptr;
+
+ while ((mp = getq(q)) != NULL) {
+ /*
+ * we can only get M_DATA types into our Queue,
+ * due to our Put function
+ */
+
+ if (p == NULL) {
+ if (!canput(q->q_next)) {
+ putbq(q, mp);
+ return;
+ }
+ putnext(q, mp);
+ continue;
+ }
+
+ len = msgdsize(mp);
+#ifdef PPP_STATS
+ p->pii_stats.ppp_ibytes += len;
+#endif
+
+ /* make sure ppp_header is completely in first block */
+ if (mp->b_wptr - mp->b_rptr < PPP_HDRLEN
+ && !pullupmsg(mp, PPP_HDRLEN)) {
+ DLOG("pullupmsg failed!\n", 0);
+ freemsg(mp);
+ p->pii_ifnet.if_ierrors++;
+ continue;
+ }
+ m0 = mp; /* remember first message block */
+
+#ifdef VJC
+ switch (PPP_PROTOCOL(mp->b_rptr)) {
+ case PPP_VJC_COMP :
+ if ((p->pii_flags & PII_FLAGS_VJC_REJ)
+ || p->pii_npmode[NP_IP] != NPMODE_PASS) {
+ DLOG("VJC rejected\n", 0);
+ freemsg(mp);
+ continue;
+ }
+ address = PPP_ADDRESS(mp->b_rptr);
+ control = PPP_CONTROL(mp->b_rptr);
+ mp->b_rptr += PPP_HDRLEN;
+ len -= PPP_HDRLEN;
+
+ /*
+ * Make sure the VJ header is in one message block.
+ */
+ xlen = MIN(len, MAX_VJHDR);
+ if (mp->b_rptr + xlen > mp->b_wptr && !pullupmsg(mp, xlen)) {
+ DLOG("pullupmsg vjc %d failed\n", xlen);
+ freemsg(mp);
+ continue;
+ }
+
+ /*
+ * Decompress it, then get a buffer and put the
+ * decompressed header in it.
+ */
+ xlen = vj_uncompress_tcp(mp->b_rptr, mp->b_wptr - mp->b_rptr,
+ len, &p->pii_sc_comp, &iphdr, &hlen);
+ if (xlen < 0) {
+ DLOG("ppp: vj_uncompress failed on type Compressed\n", 0);
+ freemsg(mp);
+ continue;
+ }
+ if (!(mvjc = allocb(hlen + PPP_HDRLEN, BPRI_MED))) {
+ DLOG("allocb mvjc failed (%d)\n", hlen + PPP_HDRLEN);
+ freemsg(mp);
+ continue;
+ }
+ cp = mvjc->b_rptr;
+ cp[0] = address;
+ cp[1] = control;
+ cp[2] = 0;
+ cp[3] = PPP_IP;
+ bcopy(iphdr, cp + PPP_HDRLEN, hlen);
+ mvjc->b_wptr = cp + PPP_HDRLEN + hlen;
+ mvjc->b_cont = mp;
+ mp->b_rptr += xlen;
+ m0 = mp = mvjc;
+ len += PPP_HDRLEN + hlen;
+ break;
+
+ case PPP_VJC_UNCOMP :
+ if ((p->pii_flags & PII_FLAGS_VJC_REJ)
+ || p->pii_npmode[NP_IP] != NPMODE_PASS) {
+ DLOG("VJU rejected\n", 0);
+ freemsg(mp);
+ continue;
+ }
+
+ /*
+ * Make sure the IP header is in one message block.
+ */
+ xlen = MIN(len, MAX_IPHDR + PPP_HDRLEN);
+ if (mp->b_rptr + xlen > mp->b_wptr && !pullupmsg(mp, xlen)) {
+ DLOG("pullupmsg vju %d failed\n", xlen);
+ freemsg(mp);
+ continue;
+ }
+
+ /*
+ * "Uncompress" it. Basically this just copies information
+ * into p->pii_sc_comp and restores the protocol field of
+ * the IP header.
+ */
+ if (!vj_uncompress_uncomp(mp->b_rptr + PPP_HDRLEN,
+ &p->pii_sc_comp)) {
+ DLOG("ppp: vj_uncompress failed on type Uncompresed\n", 0);
+ freemsg(mp);
+ continue;
+ }
+ mp->b_rptr[3] = PPP_IP;
+ break;
+ }
+#endif
+
+ switch (PPP_PROTOCOL(mp->b_rptr)) {
+ default:
+ if (!canput(q->q_next)) {
+ putbq(q, mp);
+ return;
+ }
+ INCR(ppp_ipackets);
+ p->pii_ifnet.if_ipackets++;
+ putnext(q, mp);
+ continue;
+
+ case PPP_IP:
+ /*
+ * Don't let packets through until IPCP is up.
+ */
+ INCR(ppp_ipackets);
+ p->pii_ifnet.if_ipackets++;
+
+ if (!(p->pii_ifnet.if_flags & IFF_UP)
+ || p->pii_npmode[NP_IP] != NPMODE_PASS) {
+ DLOG("pkt ignored - IP down\n", 0);
+ freemsg(mp);
+ continue;
+ }
+
+ /*
+ * Get the first mbuf and put the struct ifnet * in.
+ */
+ MGETHDR(mb1, M_DONTWAIT, MT_DATA);
+ mb1->m_len = 0;
+ if (mb1 == NULL) {
+ p->pii_ifnet.if_ierrors++;
+ freemsg(m0);
+ continue;
+ }
+ len = MHLEN;
+ mbtail = mb2 = mb1;
+ pklen = 0;
+
+ rptr = mp->b_rptr + PPP_HDRLEN;
+ xlen = mp->b_wptr - rptr;
+ for(;;) {
+ if (xlen == 0) { /* move to the next mblk */
+ mp = mp->b_cont;
+ if (mp == NULL)
+ break;
+ xlen = mp->b_wptr - (rptr = mp->b_rptr);
+ continue;
+ }
+ if (len == 0) {
+ MGET(mb2, M_DONTWAIT, MT_DATA);
+ if (!mb2) {
+ /* if we couldn't get a buffer, drop the packet */
+ p->pii_ifnet.if_ierrors++;
+ m_freem(mb1); /* discard what we've used already */
+ mb1 = NULL;
+ break;
+ }
+ len = MLEN;
+ mb2->m_len = 0;
+ mbtail->m_next = mb2;
+ mbtail = mb2;
+ }
+ count = MIN(xlen, len);
+ bcopy((char *) rptr, mtod(mb2, char *) + mb2->m_len, count);
+ rptr += count;
+ len -= count;
+ xlen -= count;
+ pklen += count;
+ mb2->m_len += count;
+ }
+
+ freemsg(m0);
+ if (mb1 == NULL)
+ continue;
+
+#ifdef PPP_SNIT
+ if (p->pii_ifnet.if_flags & IFF_PROMISC) {
+ struct mbuf *m = mb1;
+
+ len = 0;
+ do {
+ len += m->m_len;
+ } while (m = m->m_next);
+ nif.nif_bodylen = len - sizeof(struct ifnet *);
+ mb1->m_off += sizeof(struct ifnet *);
+ snit_intr(&p->pii_ifnet, mb1, &nif);
+ mb1->m_off -= sizeof(struct ifnet *);
+ }
+#endif
+/*
+ if (IF_QFULL(&ipintrq)) {
+ IF_DROP(&ipintrq);
+ p->pii_ifnet.if_ierrors++;
+ m_freem(mb1);
+ }
+ else {
+*/
+ ifp = &p->pii_ifnet;
+ mb1->m_pkthdr.len = pklen;
+ mb1->m_pkthdr.rcvif = ifp;
+ find_input_type(0x0800, mb1, ifp, 0);
+ }
+ } /* end while */
+}
+
+/* ifp output procedure */
+int
+ppp_output(ifp, m0, dst)
+ struct ifnet *ifp;
+ struct mbuf *m0;
+ struct sockaddr *dst;
+{
+ register PII *p = &pii[ifp->if_unit];
+ struct mbuf *m1;
+ int error, s, len;
+ u_short protocol;
+#ifdef VJC
+ int type;
+ u_char *vjhdr;
+#endif
+ mblk_t *mp;
+ enum NPmode npmode;
+
+ error = 0;
+ if (!(ifp->if_flags & IFF_UP)) {
+ error = ENETDOWN;
+ goto getout;
+ }
+
+ switch (dst->sa_family) {
+#ifdef INET
+ case AF_INET:
+#ifdef PPP_SNIT
+ if (ifp->if_flags & IFF_PROMISC) {
+ struct mbuf *m = m0;
+
+ len = 0;
+ do {
+ len += m->m_len;
+ } while (m = m->m_next);
+ nif.nif_bodylen = len;
+ snit_intr(ifp, m0, &nif);
+ }
+#endif
+ protocol = PPP_IP;
+ npmode = p->pii_npmode[NP_IP];
+ break;
+#endif
+
+ default:
+ DLOG("ppp: af%d not supported\n", dst->sa_family);
+ error = EAFNOSUPPORT;
+ goto getout;
+ }
+
+ if (!p->pii_writeq) {
+ DLOG("ppp_if%d: no queue\n", p - pii);
+ error = EHOSTUNREACH;
+ goto getout;
+ }
+
+ switch (npmode) {
+ case NPMODE_DROP:
+ goto getout;
+ case NPMODE_ERROR:
+ error = ENETDOWN;
+ goto getout;
+ }
+
+#ifdef VJC
+ if ((protocol == PPP_IP) && (p->pii_flags & PII_FLAGS_VJC_ON)) {
+ register struct ip *ip;
+ ip = mtod(m0, struct ip *);
+ if (ip->ip_p == IPPROTO_TCP) {
+ type = vj_compress_tcp(ip, m0->m_len, &p->pii_sc_comp,
+ !(p->pii_flags & PII_FLAGS_VJC_NOCCID),
+ &vjhdr);
+ switch (type) {
+ case TYPE_UNCOMPRESSED_TCP :
+ protocol = PPP_VJC_UNCOMP;
+ break;
+ case TYPE_COMPRESSED_TCP :
+ protocol = PPP_VJC_COMP;
+ len = vjhdr - (u_char *) ip;
+ m0->m_data += len;
+ m0->m_len -= len;
+ break;
+ }
+ }
+ }
+#endif
+
+ len = PPP_HDRLEN;
+ for (m1 = m0; m1; m1 = m1->m_next)
+ len += m1->m_len;
+
+ if (!(mp = allocb(len, BPRI_MED))) {
+ DLOG("ppp_if%d: allocb failed\n", p - pii);
+ error = ENOBUFS;
+ goto getout;
+ }
+
+#ifdef PPP_STATS
+ p->pii_stats.ppp_obytes += len;
+#endif
+
+ *mp->b_wptr++ = PPP_ALLSTATIONS;
+ *mp->b_wptr++ = PPP_UI;
+ *mp->b_wptr++ = 0;
+ *mp->b_wptr++ = protocol;
+ for (m1 = m0; m1; m1 = m1->m_next) { /* copy all data */
+ bcopy(mtod(m1, char *), (char *) mp->b_wptr, m1->m_len);
+ mp->b_wptr += m1->m_len;
+ }
+
+ p->pii_ifnet.if_opackets++;
+DLOG("ppp_output npmode is %d\n",npmode);
+ if (npmode == NPMODE_PASS) {
+ putq(p->pii_writeq, mp);
+ } else {
+ mp->b_next = NULL;
+ *p->pii_npq_tail = mp;
+ p->pii_npq_tail = ∓
+ }
+
+ getout:
+ m_freem(m0);
+ if (error) {
+ INCR(ppp_oerrors);
+ p->pii_ifnet.if_oerrors++;
+ }
+ return (error);
+}
+
+/*
+ * if_ ioctl requests
+*/
+ppp_ioctl(ifp, cmd, data)
+ register struct ifnet *ifp;
+ unsigned int cmd;
+ caddr_t data;
+{
+ register struct ifaddr *ifa = (struct ifaddr *) data;
+ register struct ifreq *ifr = (struct ifreq *) data;
+ struct ppp_stats *psp;
+ struct ppp_comp_stats *pcp;
+ PII *p;
+ int error = 0;
+
+ switch (cmd) {
+ case SIOCSIFFLAGS :
+ /* This happens every time IFF_PROMISC has been changed. */
+ if (!ifr)
+ break;
+ if (!suser()) {
+ error = EPERM;
+ break;
+ }
+
+ /* clear the flags that can be cleared */
+ ifp->if_flags &= (IFF_CANTCHANGE);
+ /* or in the flags that can be changed */
+ ifp->if_flags |= (ifr->ifr_flags & ~IFF_CANTCHANGE);
+ break;
+
+ case SIOCGIFFLAGS :
+ ifr->ifr_flags = ifp->if_flags;
+ 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 :
+ if (!suser()) {
+ error = EPERM;
+ break;
+ }
+ if (ifr->ifr_mtu > MAX_PKTSIZE - PPP_FRAMING) {
+ error = EINVAL;
+ break;
+ }
+ ifp->if_mtu = ifr->ifr_mtu;
+ break;
+
+ case SIOCGIFMTU :
+ ifr->ifr_mtu = ifp->if_mtu;
+ break;
+
+ case SIOCGPPPSTATS:
+ p = &pii[ifp->if_unit];
+ psp = (struct ppp_stats *) &((struct ifpppstatsreq *)data)->stats;
+ bzero(psp, sizeof(struct ppp_stats));
+#ifdef PPP_STATS
+ psp->p = p->pii_stats;
+#endif
+#if defined(VJC) && !defined(VJ_NO_STATS)
+ psp->vj = p->pii_sc_comp.stats;
+#endif
+ break;
+
+ case SIOCGPPPCSTATS:
+ p = &pii[ifp->if_unit];
+ pcp = (struct ppp_comp_stats *)&((struct ifpppcstatsreq *)data)->stats;
+ bzero(pcp, sizeof(struct ppp_comp_stats));
+ /* XXX we need to fill in the compression stats */
+ break;
+
+ default :
+ error = EINVAL;
+ break;
+ }
+ return(error);
+}
+
+#endif
projects / ppp.git / commitdiff