2 * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org>
3 * based on work by Toshiharu OHNO <tony-o@iij.ad.jp>
4 * Internet Initiative Japan, Inc (IIJ)
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/param.h>
32 #include <netinet/in_systm.h>
33 #include <netinet/in.h>
34 #include <netinet/ip.h>
35 #include <arpa/inet.h>
36 #include <sys/socket.h>
38 #include <net/route.h>
70 #include "throughput.h"
71 #include "slcompress.h"
79 #include "descriptor.h"
100 #define REJECTED(p, x) ((p)->peer_reject & (1<<(x)))
101 #define issep(ch) ((ch) == ' ' || (ch) == '\t')
102 #define isip(ch) (((ch) >= '0' && (ch) <= '9') || (ch) == '.')
110 static int IpcpLayerUp(struct fsm *);
111 static void IpcpLayerDown(struct fsm *);
112 static void IpcpLayerStart(struct fsm *);
113 static void IpcpLayerFinish(struct fsm *);
114 static void IpcpInitRestartCounter(struct fsm *, int);
115 static void IpcpSendConfigReq(struct fsm *);
116 static void IpcpSentTerminateReq(struct fsm *);
117 static void IpcpSendTerminateAck(struct fsm *, u_char);
118 static void IpcpDecodeConfig(struct fsm *, u_char *, u_char *, int,
119 struct fsm_decode *);
121 static struct fsm_callbacks ipcp_Callbacks = {
126 IpcpInitRestartCounter,
128 IpcpSentTerminateReq,
129 IpcpSendTerminateAck,
131 fsm_NullRecvResetReq,
142 /* Check out the latest ``Assigned numbers'' rfc (rfc1700.txt) */
143 { 1, "IPADDRS" }, /* IP-Addresses */ /* deprecated */
144 { 2, "COMPPROTO" }, /* IP-Compression-Protocol */
145 { 3, "IPADDR" }, /* IP-Address */
146 { 129, "PRIDNS" }, /* 129: Primary DNS Server Address */
147 { 130, "PRINBNS" }, /* 130: Primary NBNS Server Address */
148 { 131, "SECDNS" }, /* 131: Secondary DNS Server Address */
149 { 132, "SECNBNS" } /* 132: Secondary NBNS Server Address */
153 for (f = 0; f < sizeof cftypes / sizeof *cftypes; f++)
154 if (cftypes[f].id == proto)
155 return cftypes[f].txt;
157 return NumStr(proto, NULL, 0);
161 ipcp_AddInOctets(struct ipcp *ipcp, int n)
163 throughput_addin(&ipcp->throughput, n);
167 ipcp_AddOutOctets(struct ipcp *ipcp, int n)
169 throughput_addout(&ipcp->throughput, n);
173 ipcp_LoadDNS(struct ipcp *ipcp)
177 ipcp->ns.dns[0].s_addr = ipcp->ns.dns[1].s_addr = INADDR_NONE;
179 if (ipcp->ns.resolv != NULL) {
180 free(ipcp->ns.resolv);
181 ipcp->ns.resolv = NULL;
183 if (ipcp->ns.resolv_nons != NULL) {
184 free(ipcp->ns.resolv_nons);
185 ipcp->ns.resolv_nons = NULL;
187 ipcp->ns.resolver = 0;
189 if ((fd = open(_PATH_RESCONF, O_RDONLY)) != -1) {
192 if (fstat(fd, &st) == 0) {
196 * Note, ns.resolv and ns.resolv_nons are assumed to always point to
197 * buffers of the same size! See the strcpy() below.
199 if ((ipcp->ns.resolv_nons = (char *)malloc(st.st_size + 1)) == NULL)
200 log_Printf(LogERROR, "Failed to malloc %lu for %s: %s\n",
201 (unsigned long)st.st_size, _PATH_RESCONF, strerror(errno));
202 else if ((ipcp->ns.resolv = (char *)malloc(st.st_size + 1)) == NULL) {
203 log_Printf(LogERROR, "Failed(2) to malloc %lu for %s: %s\n",
204 (unsigned long)st.st_size, _PATH_RESCONF, strerror(errno));
205 free(ipcp->ns.resolv_nons);
206 ipcp->ns.resolv_nons = NULL;
207 } else if ((got = read(fd, ipcp->ns.resolv, st.st_size)) != st.st_size) {
209 log_Printf(LogERROR, "Failed to read %s: %s\n",
210 _PATH_RESCONF, strerror(errno));
212 log_Printf(LogERROR, "Failed to read %s, got %lu not %lu\n",
213 _PATH_RESCONF, (unsigned long)got,
214 (unsigned long)st.st_size);
215 free(ipcp->ns.resolv_nons);
216 ipcp->ns.resolv_nons = NULL;
217 free(ipcp->ns.resolv);
218 ipcp->ns.resolv = NULL;
220 char *cp, *cp_nons, *ncp, ch;
223 ipcp->ns.resolv[st.st_size] = '\0';
224 ipcp->ns.resolver = 1;
226 cp_nons = ipcp->ns.resolv_nons;
227 cp = ipcp->ns.resolv;
230 while ((ncp = strstr(cp, "nameserver")) != NULL) {
232 memcpy(cp_nons, cp, ncp - cp);
235 if ((ncp != cp && ncp[-1] != '\n') || !issep(ncp[10])) {
236 memcpy(cp_nons, ncp, 9);
238 cp = ncp + 9; /* Can't match "nameserver" at cp... */
242 for (cp = ncp + 11; issep(*cp); cp++) /* Skip whitespace */
245 for (ncp = cp; isip(*ncp); ncp++) /* Jump over IP */
250 if (n < 2 && inet_aton(cp, ipcp->ns.dns))
254 if ((cp = strchr(ncp, '\n')) == NULL) /* Point at next line */
255 cp = ncp + strlen(ncp);
260 * Note, cp_nons and cp always point to buffers of the same size, so
263 strcpy(cp_nons, cp); /* Copy the end - including the NUL */
264 cp_nons += strlen(cp_nons) - 1;
265 while (cp_nons >= ipcp->ns.resolv_nons && *cp_nons == '\n')
267 if (n == 2 && ipcp->ns.dns[0].s_addr == INADDR_ANY) {
268 ipcp->ns.dns[0].s_addr = ipcp->ns.dns[1].s_addr;
269 ipcp->ns.dns[1].s_addr = INADDR_ANY;
271 bundle_AdjustDNS(ipcp->fsm.bundle);
274 log_Printf(LogERROR, "Failed to stat opened %s: %s\n",
275 _PATH_RESCONF, strerror(errno));
282 ipcp_WriteDNS(struct ipcp *ipcp)
288 if (ipcp->ns.dns[0].s_addr == INADDR_ANY &&
289 ipcp->ns.dns[1].s_addr == INADDR_ANY) {
290 log_Printf(LogIPCP, "%s not modified: All nameservers NAKd\n",
295 if (ipcp->ns.dns[0].s_addr == INADDR_ANY) {
296 ipcp->ns.dns[0].s_addr = ipcp->ns.dns[1].s_addr;
297 ipcp->ns.dns[1].s_addr = INADDR_ANY;
301 if ((fp = ID0fopen(_PATH_RESCONF, "w")) != NULL) {
303 if (ipcp->ns.resolv_nons)
304 fputs(ipcp->ns.resolv_nons, fp);
305 paddr = inet_ntoa(ipcp->ns.dns[0]);
306 log_Printf(LogIPCP, "Primary nameserver set to %s\n", paddr);
307 fprintf(fp, "\nnameserver %s\n", paddr);
308 if (ipcp->ns.dns[1].s_addr != INADDR_ANY &&
309 ipcp->ns.dns[1].s_addr != INADDR_NONE &&
310 ipcp->ns.dns[1].s_addr != ipcp->ns.dns[0].s_addr) {
311 paddr = inet_ntoa(ipcp->ns.dns[1]);
312 log_Printf(LogIPCP, "Secondary nameserver set to %s\n", paddr);
313 fprintf(fp, "nameserver %s\n", paddr);
315 if (fclose(fp) == EOF) {
316 log_Printf(LogERROR, "write(): Failed updating %s: %s\n", _PATH_RESCONF,
327 ipcp_RestoreDNS(struct ipcp *ipcp)
329 if (ipcp->ns.resolver) {
333 if ((fd = ID0open(_PATH_RESCONF, O_WRONLY|O_TRUNC, 0644)) != -1) {
334 len = strlen(ipcp->ns.resolv);
335 if ((got = write(fd, ipcp->ns.resolv, len)) != len) {
337 log_Printf(LogERROR, "Failed rewriting %s: write: %s\n",
338 _PATH_RESCONF, strerror(errno));
340 log_Printf(LogERROR, "Failed rewriting %s: wrote %ld of %ld\n",
341 _PATH_RESCONF, (long)got, (long)len);
345 log_Printf(LogERROR, "Failed rewriting %s: open: %s\n", _PATH_RESCONF,
347 } else if (remove(_PATH_RESCONF) == -1)
348 log_Printf(LogERROR, "Failed removing %s: %s\n", _PATH_RESCONF,
354 ipcp_Show(struct cmdargs const *arg)
356 struct ipcp *ipcp = &arg->bundle->ncp.ipcp;
358 prompt_Printf(arg->prompt, "%s [%s]\n", ipcp->fsm.name,
359 State2Nam(ipcp->fsm.state));
360 if (ipcp->fsm.state == ST_OPENED) {
361 prompt_Printf(arg->prompt, " His side: %s, %s\n",
362 inet_ntoa(ipcp->peer_ip), vj2asc(ipcp->peer_compproto));
363 prompt_Printf(arg->prompt, " My side: %s, %s\n",
364 inet_ntoa(ipcp->my_ip), vj2asc(ipcp->my_compproto));
365 prompt_Printf(arg->prompt, " Queued packets: %lu\n",
366 (unsigned long)ipcp_QueueLen(ipcp));
369 prompt_Printf(arg->prompt, "\nDefaults:\n");
370 prompt_Printf(arg->prompt, " FSM retry = %us, max %u Config"
371 " REQ%s, %u Term REQ%s\n", ipcp->cfg.fsm.timeout,
372 ipcp->cfg.fsm.maxreq, ipcp->cfg.fsm.maxreq == 1 ? "" : "s",
373 ipcp->cfg.fsm.maxtrm, ipcp->cfg.fsm.maxtrm == 1 ? "" : "s");
374 prompt_Printf(arg->prompt, " My Address: %s\n",
375 ncprange_ntoa(&ipcp->cfg.my_range));
376 if (ipcp->cfg.HaveTriggerAddress)
377 prompt_Printf(arg->prompt, " Trigger address: %s\n",
378 inet_ntoa(ipcp->cfg.TriggerAddress));
380 prompt_Printf(arg->prompt, " VJ compression: %s (%d slots %s slot "
381 "compression)\n", command_ShowNegval(ipcp->cfg.vj.neg),
382 ipcp->cfg.vj.slots, ipcp->cfg.vj.slotcomp ? "with" : "without");
384 if (iplist_isvalid(&ipcp->cfg.peer_list))
385 prompt_Printf(arg->prompt, " His Address: %s\n",
386 ipcp->cfg.peer_list.src);
388 prompt_Printf(arg->prompt, " His Address: %s\n",
389 ncprange_ntoa(&ipcp->cfg.peer_range));
391 prompt_Printf(arg->prompt, " DNS: %s",
392 ipcp->cfg.ns.dns[0].s_addr == INADDR_NONE ?
393 "none" : inet_ntoa(ipcp->cfg.ns.dns[0]));
394 if (ipcp->cfg.ns.dns[1].s_addr != INADDR_NONE)
395 prompt_Printf(arg->prompt, ", %s",
396 inet_ntoa(ipcp->cfg.ns.dns[1]));
397 prompt_Printf(arg->prompt, ", %s\n",
398 command_ShowNegval(ipcp->cfg.ns.dns_neg));
399 prompt_Printf(arg->prompt, " Resolver DNS: %s",
400 ipcp->ns.dns[0].s_addr == INADDR_NONE ?
401 "none" : inet_ntoa(ipcp->ns.dns[0]));
402 if (ipcp->ns.dns[1].s_addr != INADDR_NONE &&
403 ipcp->ns.dns[1].s_addr != ipcp->ns.dns[0].s_addr)
404 prompt_Printf(arg->prompt, ", %s",
405 inet_ntoa(ipcp->ns.dns[1]));
406 prompt_Printf(arg->prompt, "\n NetBIOS NS: %s, ",
407 inet_ntoa(ipcp->cfg.ns.nbns[0]));
408 prompt_Printf(arg->prompt, "%s\n\n",
409 inet_ntoa(ipcp->cfg.ns.nbns[1]));
411 throughput_disp(&ipcp->throughput, arg->prompt);
417 ipcp_vjset(struct cmdargs const *arg)
419 if (arg->argc != arg->argn+2)
421 if (!strcasecmp(arg->argv[arg->argn], "slots")) {
424 slots = atoi(arg->argv[arg->argn+1]);
425 if (slots < 4 || slots > 16)
427 arg->bundle->ncp.ipcp.cfg.vj.slots = slots;
429 } else if (!strcasecmp(arg->argv[arg->argn], "slotcomp")) {
430 if (!strcasecmp(arg->argv[arg->argn+1], "on"))
431 arg->bundle->ncp.ipcp.cfg.vj.slotcomp = 1;
432 else if (!strcasecmp(arg->argv[arg->argn+1], "off"))
433 arg->bundle->ncp.ipcp.cfg.vj.slotcomp = 0;
442 ipcp_Init(struct ipcp *ipcp, struct bundle *bundle, struct link *l,
443 const struct fsm_parent *parent)
447 char name[MAXHOSTNAMELEN];
448 static const char * const timer_names[] =
449 {"IPCP restart", "IPCP openmode", "IPCP stopped"};
451 fsm_Init(&ipcp->fsm, "IPCP", PROTO_IPCP, 1, IPCP_MAXCODE, LogIPCP,
452 bundle, l, parent, &ipcp_Callbacks, timer_names);
454 ipcp->cfg.vj.slots = DEF_VJ_STATES;
455 ipcp->cfg.vj.slotcomp = 1;
456 memset(&ipcp->cfg.my_range, '\0', sizeof ipcp->cfg.my_range);
458 host.s_addr = htonl(INADDR_LOOPBACK);
459 ipcp->cfg.netmask.s_addr = INADDR_ANY;
460 if (gethostname(name, sizeof name) == 0) {
461 hp = gethostbyname(name);
462 if (hp && hp->h_addrtype == AF_INET && hp->h_length == sizeof host.s_addr)
463 memcpy(&host.s_addr, hp->h_addr, sizeof host.s_addr);
465 ncprange_setip4(&ipcp->cfg.my_range, host, ipcp->cfg.netmask);
466 ncprange_setip4(&ipcp->cfg.peer_range, ipcp->cfg.netmask, ipcp->cfg.netmask);
468 iplist_setsrc(&ipcp->cfg.peer_list, "");
469 ipcp->cfg.HaveTriggerAddress = 0;
471 ipcp->cfg.ns.dns[0].s_addr = INADDR_NONE;
472 ipcp->cfg.ns.dns[1].s_addr = INADDR_NONE;
473 ipcp->cfg.ns.dns_neg = 0;
474 ipcp->cfg.ns.nbns[0].s_addr = INADDR_ANY;
475 ipcp->cfg.ns.nbns[1].s_addr = INADDR_ANY;
477 ipcp->cfg.fsm.timeout = DEF_FSMRETRY;
478 ipcp->cfg.fsm.maxreq = DEF_FSMTRIES;
479 ipcp->cfg.fsm.maxtrm = DEF_FSMTRIES;
480 ipcp->cfg.vj.neg = NEG_ENABLED|NEG_ACCEPTED;
482 memset(&ipcp->vj, '\0', sizeof ipcp->vj);
484 ipcp->ns.resolv = NULL;
485 ipcp->ns.resolv_nons = NULL;
486 ipcp->ns.writable = 1;
489 throughput_init(&ipcp->throughput, SAMPLE_PERIOD);
490 memset(ipcp->Queue, '\0', sizeof ipcp->Queue);
491 ipcp_Setup(ipcp, INADDR_NONE);
495 ipcp_Destroy(struct ipcp *ipcp)
497 throughput_destroy(&ipcp->throughput);
499 if (ipcp->ns.resolv != NULL) {
500 free(ipcp->ns.resolv);
501 ipcp->ns.resolv = NULL;
503 if (ipcp->ns.resolv_nons != NULL) {
504 free(ipcp->ns.resolv_nons);
505 ipcp->ns.resolv_nons = NULL;
510 ipcp_SetLink(struct ipcp *ipcp, struct link *l)
516 ipcp_Setup(struct ipcp *ipcp, u_int32_t mask)
518 struct iface *iface = ipcp->fsm.bundle->iface;
519 struct ncpaddr ipaddr;
524 ipcp->fsm.open_mode = 0;
525 ipcp->ifmask.s_addr = mask == INADDR_NONE ? ipcp->cfg.netmask.s_addr : mask;
527 if (iplist_isvalid(&ipcp->cfg.peer_list)) {
528 /* Try to give the peer a previously configured IP address */
529 for (n = 0; n < iface->addrs; n++) {
530 if (!ncpaddr_getip4(&iface->addr[n].peer, &peer))
532 if ((pos = iplist_ip2pos(&ipcp->cfg.peer_list, peer)) != -1) {
533 ncpaddr_setip4(&ipaddr, iplist_setcurpos(&ipcp->cfg.peer_list, pos));
537 if (n == iface->addrs)
538 /* Ok, so none of 'em fit.... pick a random one */
539 ncpaddr_setip4(&ipaddr, iplist_setrandpos(&ipcp->cfg.peer_list));
541 ncprange_sethost(&ipcp->cfg.peer_range, &ipaddr);
546 ncprange_getip4addr(&ipcp->cfg.peer_range, &ipcp->peer_ip);
547 ipcp->peer_compproto = 0;
549 if (ipcp->cfg.HaveTriggerAddress) {
551 * Some implementations of PPP require that we send a
552 * *special* value as our address, even though the rfc specifies
553 * full negotiation (e.g. "0.0.0.0" or Not "0.0.0.0").
555 ipcp->my_ip = ipcp->cfg.TriggerAddress;
556 log_Printf(LogIPCP, "Using trigger address %s\n",
557 inet_ntoa(ipcp->cfg.TriggerAddress));
560 * Otherwise, if we've used an IP number before and it's still within
561 * the network specified on the ``set ifaddr'' line, we really
562 * want to keep that IP number so that we can keep any existing
563 * connections that are bound to that IP.
565 for (n = 0; n < iface->addrs; n++) {
566 ncprange_getaddr(&iface->addr[n].ifa, &ipaddr);
567 if (ncprange_contains(&ipcp->cfg.my_range, &ipaddr)) {
568 ncpaddr_getip4(&ipaddr, &ipcp->my_ip);
572 if (n == iface->addrs)
573 ncprange_getip4addr(&ipcp->cfg.my_range, &ipcp->my_ip);
576 if (IsEnabled(ipcp->cfg.vj.neg)
578 || (ipcp->fsm.bundle->radius.valid && ipcp->fsm.bundle->radius.vj)
581 ipcp->my_compproto = (PROTO_VJCOMP << 16) +
582 ((ipcp->cfg.vj.slots - 1) << 8) +
583 ipcp->cfg.vj.slotcomp;
585 ipcp->my_compproto = 0;
586 sl_compress_init(&ipcp->vj.cslc, ipcp->cfg.vj.slots - 1);
588 ipcp->peer_reject = 0;
591 /* Copy startup values into ipcp->ns.dns */
592 if (ipcp->cfg.ns.dns[0].s_addr != INADDR_NONE)
593 memcpy(ipcp->ns.dns, ipcp->cfg.ns.dns, sizeof ipcp->ns.dns);
597 numaddresses(struct in_addr mask)
599 u_int32_t bit, haddr;
602 haddr = ntohl(mask.s_addr);
615 ipcp_proxyarp(struct ipcp *ipcp,
616 int (*proxyfun)(struct bundle *, struct in_addr),
617 const struct iface_addr *addr)
619 struct bundle *bundle = ipcp->fsm.bundle;
620 struct in_addr peer, mask, ip;
623 if (!ncpaddr_getip4(&addr->peer, &peer)) {
624 log_Printf(LogERROR, "Oops, ipcp_proxyarp() called with unexpected addr\n");
630 if (Enabled(bundle, OPT_PROXYALL)) {
631 ncprange_getip4mask(&addr->ifa, &mask);
632 if ((n = numaddresses(mask)) > 256) {
633 log_Printf(LogWARN, "%s: Too many addresses for proxyall\n",
634 ncprange_ntoa(&addr->ifa));
637 ip.s_addr = peer.s_addr & mask.s_addr;
639 ip.s_addr = htonl(ntohl(ip.s_addr) + 1);
643 if (!((ip.s_addr ^ peer.s_addr) & mask.s_addr)) {
644 if (!(ret = (*proxyfun)(bundle, ip)))
648 ip.s_addr = htonl(ntohl(ip.s_addr) + 1);
651 } else if (Enabled(bundle, OPT_PROXY))
652 ret = (*proxyfun)(bundle, peer);
658 ipcp_SetIPaddress(struct ipcp *ipcp, struct in_addr myaddr,
659 struct in_addr hisaddr)
661 struct bundle *bundle = ipcp->fsm.bundle;
662 struct ncpaddr myncpaddr, hisncpaddr;
663 struct ncprange myrange;
665 struct sockaddr_storage ssdst, ssgw, ssmask;
666 struct sockaddr *sadst, *sagw, *samask;
668 sadst = (struct sockaddr *)&ssdst;
669 sagw = (struct sockaddr *)&ssgw;
670 samask = (struct sockaddr *)&ssmask;
672 ncpaddr_setip4(&hisncpaddr, hisaddr);
673 ncpaddr_setip4(&myncpaddr, myaddr);
674 ncprange_sethost(&myrange, &myncpaddr);
676 mask = addr2mask(myaddr);
678 if (ipcp->ifmask.s_addr != INADDR_ANY &&
679 (ipcp->ifmask.s_addr & mask.s_addr) == mask.s_addr)
680 ncprange_setip4mask(&myrange, ipcp->ifmask);
682 if (!iface_Add(bundle->iface, &bundle->ncp, &myrange, &hisncpaddr,
683 IFACE_ADD_FIRST|IFACE_FORCE_ADD|IFACE_SYSTEM))
686 if (!Enabled(bundle, OPT_IFACEALIAS))
687 iface_Clear(bundle->iface, &bundle->ncp, AF_INET,
688 IFACE_CLEAR_ALIASES|IFACE_SYSTEM);
690 if (bundle->ncp.cfg.sendpipe > 0 || bundle->ncp.cfg.recvpipe > 0) {
691 ncprange_getsa(&myrange, &ssgw, &ssmask);
692 ncpaddr_getsa(&hisncpaddr, &ssdst);
693 rt_Update(bundle, sadst, sagw, samask);
696 if (Enabled(bundle, OPT_SROUTES))
697 route_Change(bundle, bundle->ncp.route, &myncpaddr, &hisncpaddr);
700 if (bundle->radius.valid)
701 route_Change(bundle, bundle->radius.routes, &myncpaddr, &hisncpaddr);
707 static struct in_addr
708 ChooseHisAddr(struct bundle *bundle, struct in_addr gw)
713 for (f = 0; f < bundle->ncp.ipcp.cfg.peer_list.nItems; f++) {
714 try = iplist_next(&bundle->ncp.ipcp.cfg.peer_list);
715 log_Printf(LogDEBUG, "ChooseHisAddr: Check item %ld (%s)\n",
717 if (ipcp_SetIPaddress(&bundle->ncp.ipcp, gw, try)) {
718 log_Printf(LogIPCP, "Selected IP address %s\n", inet_ntoa(try));
723 if (f == bundle->ncp.ipcp.cfg.peer_list.nItems) {
724 log_Printf(LogDEBUG, "ChooseHisAddr: All addresses in use !\n");
725 try.s_addr = INADDR_ANY;
732 IpcpInitRestartCounter(struct fsm *fp, int what)
734 /* Set fsm timer load */
735 struct ipcp *ipcp = fsm2ipcp(fp);
737 fp->FsmTimer.load = ipcp->cfg.fsm.timeout * SECTICKS;
740 fp->restart = ipcp->cfg.fsm.maxreq;
743 fp->restart = ipcp->cfg.fsm.maxtrm;
752 IpcpSendConfigReq(struct fsm *fp)
754 /* Send config REQ please */
755 struct physical *p = link2physical(fp->link);
756 struct ipcp *ipcp = fsm2ipcp(fp);
757 u_char buff[MAX_FSM_OPT_LEN];
760 o = (struct fsm_opt *)buff;
762 if ((p && !physical_IsSync(p)) || !REJECTED(ipcp, TY_IPADDR)) {
763 memcpy(o->data, &ipcp->my_ip.s_addr, 4);
764 INC_FSM_OPT(TY_IPADDR, 6, o);
767 if (ipcp->my_compproto && !REJECTED(ipcp, TY_COMPPROTO)) {
768 if (ipcp->heis1172) {
769 u_int16_t proto = PROTO_VJCOMP;
771 ua_htons(&proto, o->data);
772 INC_FSM_OPT(TY_COMPPROTO, 4, o);
776 req.proto = htons(ipcp->my_compproto >> 16);
777 req.slots = (ipcp->my_compproto >> 8) & 255;
778 req.compcid = ipcp->my_compproto & 1;
779 memcpy(o->data, &req, 4);
780 INC_FSM_OPT(TY_COMPPROTO, 6, o);
784 if (IsEnabled(ipcp->cfg.ns.dns_neg)) {
785 if (!REJECTED(ipcp, TY_PRIMARY_DNS - TY_ADJUST_NS)) {
786 memcpy(o->data, &ipcp->ns.dns[0].s_addr, 4);
787 INC_FSM_OPT(TY_PRIMARY_DNS, 6, o);
790 if (!REJECTED(ipcp, TY_SECONDARY_DNS - TY_ADJUST_NS)) {
791 memcpy(o->data, &ipcp->ns.dns[1].s_addr, 4);
792 INC_FSM_OPT(TY_SECONDARY_DNS, 6, o);
796 fsm_Output(fp, CODE_CONFIGREQ, fp->reqid, buff, (u_char *)o - buff,
801 IpcpSentTerminateReq(struct fsm *fp __unused)
803 /* Term REQ just sent by FSM */
807 IpcpSendTerminateAck(struct fsm *fp, u_char id)
809 /* Send Term ACK please */
810 fsm_Output(fp, CODE_TERMACK, id, NULL, 0, MB_IPCPOUT);
814 IpcpLayerStart(struct fsm *fp)
816 /* We're about to start up ! */
817 struct ipcp *ipcp = fsm2ipcp(fp);
819 log_Printf(LogIPCP, "%s: LayerStart.\n", fp->link->name);
820 throughput_start(&ipcp->throughput, "IPCP throughput",
821 Enabled(fp->bundle, OPT_THROUGHPUT));
822 fp->more.reqs = fp->more.naks = fp->more.rejs = ipcp->cfg.fsm.maxreq * 3;
827 IpcpLayerFinish(struct fsm *fp)
830 struct ipcp *ipcp = fsm2ipcp(fp);
832 log_Printf(LogIPCP, "%s: LayerFinish.\n", fp->link->name);
833 throughput_stop(&ipcp->throughput);
834 throughput_log(&ipcp->throughput, LogIPCP, NULL);
838 * Called from iface_Add() via ncp_IfaceAddrAdded()
841 ipcp_IfaceAddrAdded(struct ipcp *ipcp, const struct iface_addr *addr)
843 struct bundle *bundle = ipcp->fsm.bundle;
845 if (Enabled(bundle, OPT_PROXY) || Enabled(bundle, OPT_PROXYALL))
846 ipcp_proxyarp(ipcp, arp_SetProxy, addr);
850 * Called from iface_Clear() and iface_Delete() via ncp_IfaceAddrDeleted()
853 ipcp_IfaceAddrDeleted(struct ipcp *ipcp, const struct iface_addr *addr)
855 struct bundle *bundle = ipcp->fsm.bundle;
857 if (Enabled(bundle, OPT_PROXY) || Enabled(bundle, OPT_PROXYALL))
858 ipcp_proxyarp(ipcp, arp_ClearProxy, addr);
862 IpcpLayerDown(struct fsm *fp)
864 /* About to come down */
865 struct ipcp *ipcp = fsm2ipcp(fp);
866 static int recursing;
870 snprintf(addr, sizeof addr, "%s", inet_ntoa(ipcp->my_ip));
871 log_Printf(LogIPCP, "%s: LayerDown: %s\n", fp->link->name, addr);
874 radius_Flush(&fp->bundle->radius);
875 radius_Account(&fp->bundle->radius, &fp->bundle->radacct,
876 fp->bundle->links, RAD_STOP, &ipcp->throughput);
878 if (fp->bundle->radius.cfg.file && fp->bundle->radius.filterid)
879 system_Select(fp->bundle, fp->bundle->radius.filterid, LINKDOWNFILE,
881 radius_StopTimer(&fp->bundle->radius);
885 * XXX this stuff should really live in the FSM. Our config should
886 * associate executable sections in files with events.
888 if (system_Select(fp->bundle, addr, LINKDOWNFILE, NULL, NULL) < 0) {
889 if (bundle_GetLabel(fp->bundle)) {
890 if (system_Select(fp->bundle, bundle_GetLabel(fp->bundle),
891 LINKDOWNFILE, NULL, NULL) < 0)
892 system_Select(fp->bundle, "MYADDR", LINKDOWNFILE, NULL, NULL);
894 system_Select(fp->bundle, "MYADDR", LINKDOWNFILE, NULL, NULL);
897 ipcp_Setup(ipcp, INADDR_NONE);
903 ipcp_InterfaceUp(struct ipcp *ipcp)
905 if (!ipcp_SetIPaddress(ipcp, ipcp->my_ip, ipcp->peer_ip)) {
906 log_Printf(LogERROR, "ipcp_InterfaceUp: unable to set ip address\n");
910 if (!iface_SetFlags(ipcp->fsm.bundle->iface->name, IFF_UP)) {
911 log_Printf(LogERROR, "ipcp_InterfaceUp: Can't set the IFF_UP flag on %s\n",
912 ipcp->fsm.bundle->iface->name);
917 if (ipcp->fsm.bundle->NatEnabled)
918 PacketAliasSetAddress(ipcp->my_ip);
925 IpcpLayerUp(struct fsm *fp)
928 struct ipcp *ipcp = fsm2ipcp(fp);
931 log_Printf(LogIPCP, "%s: LayerUp.\n", fp->link->name);
932 snprintf(tbuff, sizeof tbuff, "%s", inet_ntoa(ipcp->my_ip));
933 log_Printf(LogIPCP, "myaddr %s hisaddr = %s\n",
934 tbuff, inet_ntoa(ipcp->peer_ip));
936 if (ipcp->peer_compproto >> 16 == PROTO_VJCOMP)
937 sl_compress_init(&ipcp->vj.cslc, (ipcp->peer_compproto >> 8) & 255);
939 if (!ipcp_InterfaceUp(ipcp))
943 radius_Account_Set_Ip(&fp->bundle->radacct, &ipcp->peer_ip, &ipcp->ifmask);
944 radius_Account(&fp->bundle->radius, &fp->bundle->radacct, fp->bundle->links,
945 RAD_START, &ipcp->throughput);
947 if (fp->bundle->radius.cfg.file && fp->bundle->radius.filterid)
948 system_Select(fp->bundle, fp->bundle->radius.filterid, LINKUPFILE,
950 radius_StartTimer(fp->bundle);
954 * XXX this stuff should really live in the FSM. Our config should
955 * associate executable sections in files with events.
957 if (system_Select(fp->bundle, tbuff, LINKUPFILE, NULL, NULL) < 0) {
958 if (bundle_GetLabel(fp->bundle)) {
959 if (system_Select(fp->bundle, bundle_GetLabel(fp->bundle),
960 LINKUPFILE, NULL, NULL) < 0)
961 system_Select(fp->bundle, "MYADDR", LINKUPFILE, NULL, NULL);
963 system_Select(fp->bundle, "MYADDR", LINKUPFILE, NULL, NULL);
966 fp->more.reqs = fp->more.naks = fp->more.rejs = ipcp->cfg.fsm.maxreq * 3;
967 log_DisplayPrompts();
973 ipcp_ValidateReq(struct ipcp *ipcp, struct in_addr ip, struct fsm_decode *dec)
975 struct bundle *bundle = ipcp->fsm.bundle;
976 struct iface *iface = bundle->iface;
977 struct in_addr myaddr, peer;
980 if (iplist_isvalid(&ipcp->cfg.peer_list)) {
981 ncprange_getip4addr(&ipcp->cfg.my_range, &myaddr);
982 if (ip.s_addr == INADDR_ANY ||
983 iplist_ip2pos(&ipcp->cfg.peer_list, ip) < 0 ||
984 !ipcp_SetIPaddress(ipcp, myaddr, ip)) {
985 log_Printf(LogIPCP, "%s: Address invalid or already in use\n",
988 * If we've already had a valid address configured for the peer,
989 * try NAKing with that so that we don't have to upset things
992 for (n = 0; n < iface->addrs; n++) {
993 if (!ncpaddr_getip4(&iface->addr[n].peer, &peer))
995 if (iplist_ip2pos(&ipcp->cfg.peer_list, peer) >= 0) {
996 ipcp->peer_ip = peer;
1001 if (n == iface->addrs) {
1002 /* Just pick an IP number from our list */
1003 ipcp->peer_ip = ChooseHisAddr(bundle, myaddr);
1006 if (ipcp->peer_ip.s_addr == INADDR_ANY) {
1007 *dec->rejend++ = TY_IPADDR;
1009 memcpy(dec->rejend, &ip.s_addr, 4);
1012 *dec->nakend++ = TY_IPADDR;
1014 memcpy(dec->nakend, &ipcp->peer_ip.s_addr, 4);
1019 } else if (ip.s_addr == INADDR_ANY ||
1020 !ncprange_containsip4(&ipcp->cfg.peer_range, ip)) {
1022 * If the destination address is not acceptable, NAK with what we
1025 *dec->nakend++ = TY_IPADDR;
1027 for (n = 0; n < iface->addrs; n++)
1028 if (ncprange_contains(&ipcp->cfg.peer_range, &iface->addr[n].peer)) {
1029 /* We prefer the already-configured address */
1030 ncpaddr_getip4addr(&iface->addr[n].peer, (u_int32_t *)dec->nakend);
1034 if (n == iface->addrs)
1035 memcpy(dec->nakend, &ipcp->peer_ip.s_addr, 4);
1042 *dec->ackend++ = TY_IPADDR;
1044 memcpy(dec->ackend, &ip.s_addr, 4);
1049 IpcpDecodeConfig(struct fsm *fp, u_char *cp, u_char *end, int mode_type,
1050 struct fsm_decode *dec)
1052 /* Deal with incoming PROTO_IPCP */
1053 struct ncpaddr ncpaddr;
1054 struct ipcp *ipcp = fsm2ipcp(fp);
1056 u_int32_t compproto;
1057 struct compreq pcomp;
1058 struct in_addr ipaddr, dstipaddr, have_ip;
1059 char tbuff[100], tbuff2[100];
1060 struct fsm_opt *opt, nak;
1064 while (end - cp >= (int)sizeof(opt->hdr)) {
1065 if ((opt = fsm_readopt(&cp)) == NULL)
1068 snprintf(tbuff, sizeof tbuff, " %s[%d]", protoname(opt->hdr.id),
1071 switch (opt->hdr.id) {
1072 case TY_IPADDR: /* RFC1332 */
1073 memcpy(&ipaddr.s_addr, opt->data, 4);
1074 log_Printf(LogIPCP, "%s %s\n", tbuff, inet_ntoa(ipaddr));
1076 switch (mode_type) {
1079 ipcp_ValidateReq(ipcp, ipaddr, dec);
1083 if (ncprange_containsip4(&ipcp->cfg.my_range, ipaddr)) {
1084 /* Use address suggested by peer */
1085 snprintf(tbuff2, sizeof tbuff2, "%s changing address: %s ", tbuff,
1086 inet_ntoa(ipcp->my_ip));
1087 log_Printf(LogIPCP, "%s --> %s\n", tbuff2, inet_ntoa(ipaddr));
1088 ipcp->my_ip = ipaddr;
1089 ncpaddr_setip4(&ncpaddr, ipcp->my_ip);
1090 bundle_AdjustFilters(fp->bundle, &ncpaddr, NULL);
1092 log_Printf(log_IsKept(LogIPCP) ? LogIPCP : LogPHASE,
1093 "%s: Unacceptable address!\n", inet_ntoa(ipaddr));
1094 fsm_Close(&ipcp->fsm);
1099 ipcp->peer_reject |= (1 << opt->hdr.id);
1105 memcpy(&pcomp, opt->data, sizeof pcomp);
1106 compproto = (ntohs(pcomp.proto) << 16) + ((int)pcomp.slots << 8) +
1108 log_Printf(LogIPCP, "%s %s\n", tbuff, vj2asc(compproto));
1110 switch (mode_type) {
1112 if (!IsAccepted(ipcp->cfg.vj.neg))
1115 switch (opt->hdr.len) {
1116 case 4: /* RFC1172 */
1117 if (ntohs(pcomp.proto) == PROTO_VJCOMP) {
1118 log_Printf(LogWARN, "Peer is speaking RFC1172 compression "
1121 ipcp->peer_compproto = compproto;
1124 pcomp.proto = htons(PROTO_VJCOMP);
1125 nak.hdr.id = TY_COMPPROTO;
1127 memcpy(nak.data, &pcomp, 2);
1131 case 6: /* RFC1332 */
1132 if (ntohs(pcomp.proto) == PROTO_VJCOMP) {
1133 /* We know pcomp.slots' max value == MAX_VJ_STATES */
1134 if (pcomp.slots >= MIN_VJ_STATES) {
1135 /* Ok, we can do that */
1136 ipcp->peer_compproto = compproto;
1140 /* Get as close as we can to what he wants */
1142 pcomp.slots = MIN_VJ_STATES;
1143 nak.hdr.id = TY_COMPPROTO;
1145 memcpy(nak.data, &pcomp, 2);
1149 /* What we really want */
1150 pcomp.proto = htons(PROTO_VJCOMP);
1151 pcomp.slots = DEF_VJ_STATES;
1153 nak.hdr.id = TY_COMPPROTO;
1155 memcpy(nak.data, &pcomp, sizeof pcomp);
1167 if (ntohs(pcomp.proto) == PROTO_VJCOMP) {
1168 /* We know pcomp.slots' max value == MAX_VJ_STATES */
1169 if (pcomp.slots < MIN_VJ_STATES)
1170 pcomp.slots = MIN_VJ_STATES;
1171 compproto = (ntohs(pcomp.proto) << 16) + (pcomp.slots << 8) +
1175 log_Printf(LogIPCP, "%s changing compproto: %08x --> %08x\n",
1176 tbuff, ipcp->my_compproto, compproto);
1177 ipcp->my_compproto = compproto;
1181 ipcp->peer_reject |= (1 << opt->hdr.id);
1186 case TY_IPADDRS: /* RFC1172 */
1187 memcpy(&ipaddr.s_addr, opt->data, 4);
1188 memcpy(&dstipaddr.s_addr, opt->data + 4, 4);
1189 snprintf(tbuff2, sizeof tbuff2, "%s %s,", tbuff, inet_ntoa(ipaddr));
1190 log_Printf(LogIPCP, "%s %s\n", tbuff2, inet_ntoa(dstipaddr));
1192 switch (mode_type) {
1203 case TY_PRIMARY_DNS: /* DNS negotiation (rfc1877) */
1204 case TY_SECONDARY_DNS:
1205 memcpy(&ipaddr.s_addr, opt->data, 4);
1206 log_Printf(LogIPCP, "%s %s\n", tbuff, inet_ntoa(ipaddr));
1208 switch (mode_type) {
1210 if (!IsAccepted(ipcp->cfg.ns.dns_neg)) {
1211 ipcp->my_reject |= (1 << (opt->hdr.id - TY_ADJUST_NS));
1215 have_ip = ipcp->ns.dns[opt->hdr.id == TY_PRIMARY_DNS ? 0 : 1];
1217 if (opt->hdr.id == TY_PRIMARY_DNS && ipaddr.s_addr != have_ip.s_addr &&
1218 ipaddr.s_addr == ipcp->ns.dns[1].s_addr) {
1219 /* Swap 'em 'round */
1220 ipcp->ns.dns[0] = ipcp->ns.dns[1];
1221 ipcp->ns.dns[1] = have_ip;
1222 have_ip = ipcp->ns.dns[0];
1225 if (ipaddr.s_addr != have_ip.s_addr) {
1227 * The client has got the DNS stuff wrong (first request) so
1228 * we'll tell 'em how it is
1230 nak.hdr.id = opt->hdr.id;
1232 memcpy(nak.data, &have_ip.s_addr, 4);
1236 * Otherwise they have it right (this time) so we send an ack packet
1237 * back confirming it... end of story
1244 if (IsEnabled(ipcp->cfg.ns.dns_neg)) {
1246 memcpy(&ipcp->ns.dns[opt->hdr.id == TY_PRIMARY_DNS ? 0 : 1].s_addr,
1251 case MODE_REJ: /* Can't do much, stop asking */
1252 ipcp->peer_reject |= (1 << (opt->hdr.id - TY_ADJUST_NS));
1257 case TY_PRIMARY_NBNS: /* M$ NetBIOS nameserver hack (rfc1877) */
1258 case TY_SECONDARY_NBNS:
1259 memcpy(&ipaddr.s_addr, opt->data, 4);
1260 log_Printf(LogIPCP, "%s %s\n", tbuff, inet_ntoa(ipaddr));
1262 switch (mode_type) {
1265 ipcp->cfg.ns.nbns[opt->hdr.id == TY_PRIMARY_NBNS ? 0 : 1].s_addr;
1267 if (have_ip.s_addr == INADDR_ANY) {
1268 log_Printf(LogIPCP, "NBNS REQ - rejected - nbns not set\n");
1269 ipcp->my_reject |= (1 << (opt->hdr.id - TY_ADJUST_NS));
1274 if (ipaddr.s_addr != have_ip.s_addr) {
1275 nak.hdr.id = opt->hdr.id;
1277 memcpy(nak.data, &have_ip.s_addr, 4);
1284 log_Printf(LogIPCP, "MS NBNS req %d - NAK??\n", opt->hdr.id);
1288 log_Printf(LogIPCP, "MS NBNS req %d - REJ??\n", opt->hdr.id);
1294 if (mode_type != MODE_NOP) {
1295 ipcp->my_reject |= (1 << opt->hdr.id);
1303 if (ipcp->ns.writable) {
1304 log_Printf(LogDEBUG, "Updating resolver\n");
1305 if (!ipcp_WriteDNS(ipcp)) {
1306 ipcp->peer_reject |= (1 << (TY_PRIMARY_DNS - TY_ADJUST_NS));
1307 ipcp->peer_reject |= (1 << (TY_SECONDARY_DNS - TY_ADJUST_NS));
1309 bundle_AdjustDNS(fp->bundle);
1311 log_Printf(LogDEBUG, "Not updating resolver (readonly)\n");
1312 bundle_AdjustDNS(fp->bundle);
1316 if (mode_type != MODE_NOP) {
1317 if (mode_type == MODE_REQ && !ipcp->peer_req) {
1318 if (dec->rejend == dec->rej && dec->nakend == dec->nak) {
1320 * Pretend the peer has requested an IP.
1321 * We do this to ensure that we only send one NAK if the only
1322 * reason for the NAK is because the peer isn't sending a
1323 * TY_IPADDR REQ. This stops us from repeatedly trying to tell
1324 * the peer that we have to have an IP address on their end.
1328 ipaddr.s_addr = INADDR_ANY;
1329 ipcp_ValidateReq(ipcp, ipaddr, dec);
1331 fsm_opt_normalise(dec);
1335 extern struct mbuf *
1336 ipcp_Input(struct bundle *bundle, struct link *l, struct mbuf *bp)
1338 /* Got PROTO_IPCP from link */
1339 m_settype(bp, MB_IPCPIN);
1340 if (bundle_Phase(bundle) == PHASE_NETWORK)
1341 fsm_Input(&bundle->ncp.ipcp.fsm, bp);
1343 if (bundle_Phase(bundle) < PHASE_NETWORK)
1344 log_Printf(LogIPCP, "%s: Error: Unexpected IPCP in phase %s (ignored)\n",
1345 l->name, bundle_PhaseName(bundle));
1352 ipcp_UseHisIPaddr(struct bundle *bundle, struct in_addr hisaddr)
1354 struct ipcp *ipcp = &bundle->ncp.ipcp;
1355 struct in_addr myaddr;
1357 memset(&ipcp->cfg.peer_range, '\0', sizeof ipcp->cfg.peer_range);
1358 iplist_reset(&ipcp->cfg.peer_list);
1359 ipcp->peer_ip = hisaddr;
1360 ncprange_setip4host(&ipcp->cfg.peer_range, hisaddr);
1361 ncprange_getip4addr(&ipcp->cfg.my_range, &myaddr);
1363 return ipcp_SetIPaddress(ipcp, myaddr, hisaddr);
1367 ipcp_UseHisaddr(struct bundle *bundle, const char *hisaddr, int setaddr)
1369 struct in_addr myaddr;
1370 struct ncp *ncp = &bundle->ncp;
1371 struct ipcp *ipcp = &ncp->ipcp;
1372 struct ncpaddr ncpaddr;
1374 /* Use `hisaddr' for the peers address (set iface if `setaddr') */
1375 memset(&ipcp->cfg.peer_range, '\0', sizeof ipcp->cfg.peer_range);
1376 iplist_reset(&ipcp->cfg.peer_list);
1377 if (strpbrk(hisaddr, ",-")) {
1378 iplist_setsrc(&ipcp->cfg.peer_list, hisaddr);
1379 if (iplist_isvalid(&ipcp->cfg.peer_list)) {
1380 iplist_setrandpos(&ipcp->cfg.peer_list);
1381 ipcp->peer_ip = ChooseHisAddr(bundle, ipcp->my_ip);
1382 if (ipcp->peer_ip.s_addr == INADDR_ANY) {
1383 log_Printf(LogWARN, "%s: None available !\n", ipcp->cfg.peer_list.src);
1386 ncprange_setip4host(&ipcp->cfg.peer_range, ipcp->peer_ip);
1388 log_Printf(LogWARN, "%s: Invalid range !\n", hisaddr);
1391 } else if (ncprange_aton(&ipcp->cfg.peer_range, ncp, hisaddr) != 0) {
1392 if (ncprange_family(&ipcp->cfg.my_range) != AF_INET) {
1393 log_Printf(LogWARN, "%s: Not an AF_INET address !\n", hisaddr);
1396 ncprange_getip4addr(&ipcp->cfg.my_range, &myaddr);
1397 ncprange_getip4addr(&ipcp->cfg.peer_range, &ipcp->peer_ip);
1399 if (setaddr && !ipcp_SetIPaddress(ipcp, myaddr, ipcp->peer_ip))
1404 ncpaddr_setip4(&ncpaddr, ipcp->peer_ip);
1405 bundle_AdjustFilters(bundle, NULL, &ncpaddr);
1411 addr2mask(struct in_addr addr)
1413 u_int32_t haddr = ntohl(addr.s_addr);
1415 haddr = IN_CLASSA(haddr) ? IN_CLASSA_NET :
1416 IN_CLASSB(haddr) ? IN_CLASSB_NET :
1418 addr.s_addr = htonl(haddr);
1424 ipcp_QueueLen(struct ipcp *ipcp)
1430 for (q = ipcp->Queue; q < ipcp->Queue + IPCP_QUEUES(ipcp); q++)
1437 ipcp_PushPacket(struct ipcp *ipcp, struct link *l)
1439 struct bundle *bundle = ipcp->fsm.bundle;
1440 struct mqueue *queue;
1444 unsigned alivesecs = 0;
1446 if (ipcp->fsm.state != ST_OPENED)
1450 * If ccp is not open but is required, do nothing.
1452 if (l->ccp.fsm.state != ST_OPENED && ccp_Required(&l->ccp)) {
1453 log_Printf(LogPHASE, "%s: Not transmitting... waiting for CCP\n", l->name);
1457 queue = ipcp->Queue + IPCP_QUEUES(ipcp) - 1;
1460 bp = m_dequeue(queue);
1461 bp = mbuf_Read(bp, &secs, sizeof secs);
1463 m_len = m_length(bp);
1464 if (!FilterCheck(MBUF_CTOP(bp), AF_INET, &bundle->filter.alive,
1468 bundle_StartIdleTimer(bundle, secs);
1470 link_PushPacket(l, bp, bundle, 0, PROTO_IP);
1471 ipcp_AddOutOctets(ipcp, m_len);
1474 } while (queue-- != ipcp->Queue);