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/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org> * based on work by Toshiharu OHNO <tony-o@iij.ad.jp> * Internet Initiative Japan, Inc (IIJ) * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/param.h> #include <netinet/in_systm.h> #include <netinet/in.h> #include <netinet/ip.h> #include <arpa/inet.h> #include <sys/socket.h> #include <net/if.h> #include <net/route.h> #include <netdb.h> #include <sys/un.h> #include <errno.h> #include <fcntl.h> #include <resolv.h> #include <stdarg.h> #include <stdlib.h> #include <string.h> #include <sys/stat.h> #include <termios.h> #include <unistd.h> #ifndef NONAT #ifdef LOCALNAT #include "alias.h" #else #include <alias.h> #endif #endif #include "layer.h" #include "ua.h" #include "defs.h" #include "command.h" #include "mbuf.h" #include "log.h" #include "timer.h" #include "fsm.h" #include "proto.h" #include "iplist.h" #include "throughput.h" #include "slcompress.h" #include "lqr.h" #include "hdlc.h" #include "lcp.h" #include "ncpaddr.h" #include "ip.h" #include "ipcp.h" #include "filter.h" #include "descriptor.h" #include "vjcomp.h" #include "async.h" #include "ccp.h" #include "link.h" #include "physical.h" #include "mp.h" #ifndef NORADIUS #include "radius.h" #endif #include "ipv6cp.h" #include "ncp.h" #include "bundle.h" #include "id.h" #include "arp.h" #include "systems.h" #include "prompt.h" #include "route.h" #include "iface.h" #undef REJECTED #define REJECTED(p, x) ((p)->peer_reject & (1<<(x))) #define issep(ch) ((ch) == ' ' || (ch) == '\t') #define isip(ch) (((ch) >= '0' && (ch) <= '9') || (ch) == '.') struct compreq { u_short proto; u_char slots; u_char compcid; }; static int IpcpLayerUp(struct fsm *); static void IpcpLayerDown(struct fsm *); static void IpcpLayerStart(struct fsm *); static void IpcpLayerFinish(struct fsm *); static void IpcpInitRestartCounter(struct fsm *, int); static void IpcpSendConfigReq(struct fsm *); static void IpcpSentTerminateReq(struct fsm *); static void IpcpSendTerminateAck(struct fsm *, u_char); static void IpcpDecodeConfig(struct fsm *, u_char *, u_char *, int, struct fsm_decode *); extern struct libalias *la; static struct fsm_callbacks ipcp_Callbacks = { IpcpLayerUp, IpcpLayerDown, IpcpLayerStart, IpcpLayerFinish, IpcpInitRestartCounter, IpcpSendConfigReq, IpcpSentTerminateReq, IpcpSendTerminateAck, IpcpDecodeConfig, fsm_NullRecvResetReq, fsm_NullRecvResetAck }; static const char * protoname(int proto) { static struct { int id; const char *txt; } cftypes[] = { /* Check out the latest ``Assigned numbers'' rfc (rfc1700.txt) */ { 1, "IPADDRS" }, /* IP-Addresses */ /* deprecated */ { 2, "COMPPROTO" }, /* IP-Compression-Protocol */ { 3, "IPADDR" }, /* IP-Address */ { 129, "PRIDNS" }, /* 129: Primary DNS Server Address */ { 130, "PRINBNS" }, /* 130: Primary NBNS Server Address */ { 131, "SECDNS" }, /* 131: Secondary DNS Server Address */ { 132, "SECNBNS" } /* 132: Secondary NBNS Server Address */ }; unsigned f; for (f = 0; f < sizeof cftypes / sizeof *cftypes; f++) if (cftypes[f].id == proto) return cftypes[f].txt; return NumStr(proto, NULL, 0); } void ipcp_AddInOctets(struct ipcp *ipcp, int n) { throughput_addin(&ipcp->throughput, n); } void ipcp_AddOutOctets(struct ipcp *ipcp, int n) { throughput_addout(&ipcp->throughput, n); } void ipcp_LoadDNS(struct ipcp *ipcp) { int fd; ipcp->ns.dns[0].s_addr = ipcp->ns.dns[1].s_addr = INADDR_NONE; if (ipcp->ns.resolv != NULL) { free(ipcp->ns.resolv); ipcp->ns.resolv = NULL; } if (ipcp->ns.resolv_nons != NULL) { free(ipcp->ns.resolv_nons); ipcp->ns.resolv_nons = NULL; } ipcp->ns.resolver = 0; if ((fd = open(_PATH_RESCONF, O_RDONLY)) != -1) { struct stat st; if (fstat(fd, &st) == 0) { ssize_t got; /* * Note, ns.resolv and ns.resolv_nons are assumed to always point to * buffers of the same size! See the strcpy() below. */ if ((ipcp->ns.resolv_nons = (char *)malloc(st.st_size + 1)) == NULL) log_Printf(LogERROR, "Failed to malloc %lu for %s: %s\n", (unsigned long)st.st_size, _PATH_RESCONF, strerror(errno)); else if ((ipcp->ns.resolv = (char *)malloc(st.st_size + 1)) == NULL) { log_Printf(LogERROR, "Failed(2) to malloc %lu for %s: %s\n", (unsigned long)st.st_size, _PATH_RESCONF, strerror(errno)); free(ipcp->ns.resolv_nons); ipcp->ns.resolv_nons = NULL; } else if ((got = read(fd, ipcp->ns.resolv, st.st_size)) != st.st_size) { if (got == -1) log_Printf(LogERROR, "Failed to read %s: %s\n", _PATH_RESCONF, strerror(errno)); else log_Printf(LogERROR, "Failed to read %s, got %lu not %lu\n", _PATH_RESCONF, (unsigned long)got, (unsigned long)st.st_size); free(ipcp->ns.resolv_nons); ipcp->ns.resolv_nons = NULL; free(ipcp->ns.resolv); ipcp->ns.resolv = NULL; } else { char *cp, *cp_nons, *ncp, ch; int n; ipcp->ns.resolv[st.st_size] = '\0'; ipcp->ns.resolver = 1; cp_nons = ipcp->ns.resolv_nons; cp = ipcp->ns.resolv; n = 0; while ((ncp = strstr(cp, "nameserver")) != NULL) { if (ncp != cp) { memcpy(cp_nons, cp, ncp - cp); cp_nons += ncp - cp; } if ((ncp != cp && ncp[-1] != '\n') || !issep(ncp[10])) { memcpy(cp_nons, ncp, 9); cp_nons += 9; cp = ncp + 9; /* Can't match "nameserver" at cp... */ continue; } for (cp = ncp + 11; issep(*cp); cp++) /* Skip whitespace */ ; for (ncp = cp; isip(*ncp); ncp++) /* Jump over IP */ ; ch = *ncp; *ncp = '\0'; if (n < 2 && inet_aton(cp, ipcp->ns.dns)) n++; *ncp = ch; if ((cp = strchr(ncp, '\n')) == NULL) /* Point at next line */ cp = ncp + strlen(ncp); else cp++; } /* * Note, cp_nons and cp always point to buffers of the same size, so * strcpy is ok! */ strcpy(cp_nons, cp); /* Copy the end - including the NUL */ cp_nons += strlen(cp_nons) - 1; while (cp_nons >= ipcp->ns.resolv_nons && *cp_nons == '\n') *cp_nons-- = '\0'; if (n == 2 && ipcp->ns.dns[0].s_addr == INADDR_ANY) { ipcp->ns.dns[0].s_addr = ipcp->ns.dns[1].s_addr; ipcp->ns.dns[1].s_addr = INADDR_ANY; } bundle_AdjustDNS(ipcp->fsm.bundle); } } else log_Printf(LogERROR, "Failed to stat opened %s: %s\n", _PATH_RESCONF, strerror(errno)); close(fd); } } int ipcp_WriteDNS(struct ipcp *ipcp) { const char *paddr; mode_t mask; FILE *fp; if (ipcp->ns.dns[0].s_addr == INADDR_ANY && ipcp->ns.dns[1].s_addr == INADDR_ANY) { log_Printf(LogIPCP, "%s not modified: All nameservers NAKd\n", _PATH_RESCONF); return 0; } if (ipcp->ns.dns[0].s_addr == INADDR_ANY) { ipcp->ns.dns[0].s_addr = ipcp->ns.dns[1].s_addr; ipcp->ns.dns[1].s_addr = INADDR_ANY; } mask = umask(022); if ((fp = ID0fopen(_PATH_RESCONF, "w")) != NULL) { umask(mask); if (ipcp->ns.resolv_nons) fputs(ipcp->ns.resolv_nons, fp); paddr = inet_ntoa(ipcp->ns.dns[0]); log_Printf(LogIPCP, "Primary nameserver set to %s\n", paddr); fprintf(fp, "\nnameserver %s\n", paddr); if (ipcp->ns.dns[1].s_addr != INADDR_ANY && ipcp->ns.dns[1].s_addr != INADDR_NONE && ipcp->ns.dns[1].s_addr != ipcp->ns.dns[0].s_addr) { paddr = inet_ntoa(ipcp->ns.dns[1]); log_Printf(LogIPCP, "Secondary nameserver set to %s\n", paddr); fprintf(fp, "nameserver %s\n", paddr); } if (fclose(fp) == EOF) { log_Printf(LogERROR, "write(): Failed updating %s: %s\n", _PATH_RESCONF, strerror(errno)); return 0; } } else { umask(mask); log_Printf(LogERROR,"fopen(\"%s\", \"w\") failed: %s\n", _PATH_RESCONF, strerror(errno)); } return 1; } void ipcp_RestoreDNS(struct ipcp *ipcp) { if (ipcp->ns.resolver) { ssize_t got, len; int fd; if ((fd = ID0open(_PATH_RESCONF, O_WRONLY|O_TRUNC, 0644)) != -1) { len = strlen(ipcp->ns.resolv); if ((got = write(fd, ipcp->ns.resolv, len)) != len) { if (got == -1) log_Printf(LogERROR, "Failed rewriting %s: write: %s\n", _PATH_RESCONF, strerror(errno)); else log_Printf(LogERROR, "Failed rewriting %s: wrote %ld of %ld\n", _PATH_RESCONF, (long)got, (long)len); } close(fd); } else log_Printf(LogERROR, "Failed rewriting %s: open: %s\n", _PATH_RESCONF, strerror(errno)); } else if (remove(_PATH_RESCONF) == -1) log_Printf(LogERROR, "Failed removing %s: %s\n", _PATH_RESCONF, strerror(errno)); } int ipcp_Show(struct cmdargs const *arg) { struct ipcp *ipcp = &arg->bundle->ncp.ipcp; prompt_Printf(arg->prompt, "%s [%s]\n", ipcp->fsm.name, State2Nam(ipcp->fsm.state)); if (ipcp->fsm.state == ST_OPENED) { prompt_Printf(arg->prompt, " His side: %s, %s\n", inet_ntoa(ipcp->peer_ip), vj2asc(ipcp->peer_compproto)); prompt_Printf(arg->prompt, " My side: %s, %s\n", inet_ntoa(ipcp->my_ip), vj2asc(ipcp->my_compproto)); prompt_Printf(arg->prompt, " Queued packets: %lu\n", (unsigned long)ipcp_QueueLen(ipcp)); } prompt_Printf(arg->prompt, "\nDefaults:\n"); prompt_Printf(arg->prompt, " FSM retry = %us, max %u Config" " REQ%s, %u Term REQ%s\n", ipcp->cfg.fsm.timeout, ipcp->cfg.fsm.maxreq, ipcp->cfg.fsm.maxreq == 1 ? "" : "s", ipcp->cfg.fsm.maxtrm, ipcp->cfg.fsm.maxtrm == 1 ? "" : "s"); prompt_Printf(arg->prompt, " My Address: %s\n", ncprange_ntoa(&ipcp->cfg.my_range)); if (ipcp->cfg.HaveTriggerAddress) prompt_Printf(arg->prompt, " Trigger address: %s\n", inet_ntoa(ipcp->cfg.TriggerAddress)); prompt_Printf(arg->prompt, " VJ compression: %s (%d slots %s slot " "compression)\n", command_ShowNegval(ipcp->cfg.vj.neg), ipcp->cfg.vj.slots, ipcp->cfg.vj.slotcomp ? "with" : "without"); if (iplist_isvalid(&ipcp->cfg.peer_list)) prompt_Printf(arg->prompt, " His Address: %s\n", ipcp->cfg.peer_list.src); else prompt_Printf(arg->prompt, " His Address: %s\n", ncprange_ntoa(&ipcp->cfg.peer_range)); prompt_Printf(arg->prompt, " DNS: %s", ipcp->cfg.ns.dns[0].s_addr == INADDR_NONE ? "none" : inet_ntoa(ipcp->cfg.ns.dns[0])); if (ipcp->cfg.ns.dns[1].s_addr != INADDR_NONE) prompt_Printf(arg->prompt, ", %s", inet_ntoa(ipcp->cfg.ns.dns[1])); prompt_Printf(arg->prompt, ", %s\n", command_ShowNegval(ipcp->cfg.ns.dns_neg)); prompt_Printf(arg->prompt, " Resolver DNS: %s", ipcp->ns.dns[0].s_addr == INADDR_NONE ? "none" : inet_ntoa(ipcp->ns.dns[0])); if (ipcp->ns.dns[1].s_addr != INADDR_NONE && ipcp->ns.dns[1].s_addr != ipcp->ns.dns[0].s_addr) prompt_Printf(arg->prompt, ", %s", inet_ntoa(ipcp->ns.dns[1])); prompt_Printf(arg->prompt, "\n NetBIOS NS: %s, ", inet_ntoa(ipcp->cfg.ns.nbns[0])); prompt_Printf(arg->prompt, "%s\n\n", inet_ntoa(ipcp->cfg.ns.nbns[1])); throughput_disp(&ipcp->throughput, arg->prompt); return 0; } int ipcp_vjset(struct cmdargs const *arg) { if (arg->argc != arg->argn+2) return -1; if (!strcasecmp(arg->argv[arg->argn], "slots")) { int slots; slots = atoi(arg->argv[arg->argn+1]); if (slots < 4 || slots > 16) return 1; arg->bundle->ncp.ipcp.cfg.vj.slots = slots; return 0; } else if (!strcasecmp(arg->argv[arg->argn], "slotcomp")) { if (!strcasecmp(arg->argv[arg->argn+1], "on")) arg->bundle->ncp.ipcp.cfg.vj.slotcomp = 1; else if (!strcasecmp(arg->argv[arg->argn+1], "off")) arg->bundle->ncp.ipcp.cfg.vj.slotcomp = 0; else return 2; return 0; } return -1; } void ipcp_Init(struct ipcp *ipcp, struct bundle *bundle, struct link *l, const struct fsm_parent *parent) { struct hostent *hp; struct in_addr host; char name[MAXHOSTNAMELEN]; static const char * const timer_names[] = {"IPCP restart", "IPCP openmode", "IPCP stopped"}; fsm_Init(&ipcp->fsm, "IPCP", PROTO_IPCP, 1, IPCP_MAXCODE, LogIPCP, bundle, l, parent, &ipcp_Callbacks, timer_names); ipcp->cfg.vj.slots = DEF_VJ_STATES; ipcp->cfg.vj.slotcomp = 1; memset(&ipcp->cfg.my_range, '\0', sizeof ipcp->cfg.my_range); host.s_addr = htonl(INADDR_LOOPBACK); ipcp->cfg.netmask.s_addr = INADDR_ANY; if (gethostname(name, sizeof name) == 0) { hp = gethostbyname(name); if (hp && hp->h_addrtype == AF_INET && hp->h_length == sizeof host.s_addr) memcpy(&host.s_addr, hp->h_addr, sizeof host.s_addr); } ncprange_setip4(&ipcp->cfg.my_range, host, ipcp->cfg.netmask); ncprange_setip4(&ipcp->cfg.peer_range, ipcp->cfg.netmask, ipcp->cfg.netmask); iplist_setsrc(&ipcp->cfg.peer_list, ""); ipcp->cfg.HaveTriggerAddress = 0; ipcp->cfg.ns.dns[0].s_addr = INADDR_NONE; ipcp->cfg.ns.dns[1].s_addr = INADDR_NONE; ipcp->cfg.ns.dns_neg = 0; ipcp->cfg.ns.nbns[0].s_addr = INADDR_ANY; ipcp->cfg.ns.nbns[1].s_addr = INADDR_ANY; ipcp->cfg.fsm.timeout = DEF_FSMRETRY; ipcp->cfg.fsm.maxreq = DEF_FSMTRIES; ipcp->cfg.fsm.maxtrm = DEF_FSMTRIES; ipcp->cfg.vj.neg = NEG_ENABLED|NEG_ACCEPTED; memset(&ipcp->vj, '\0', sizeof ipcp->vj); ipcp->ns.resolv = NULL; ipcp->ns.resolv_nons = NULL; ipcp->ns.writable = 1; ipcp_LoadDNS(ipcp); throughput_init(&ipcp->throughput, SAMPLE_PERIOD); memset(ipcp->Queue, '\0', sizeof ipcp->Queue); ipcp_Setup(ipcp, INADDR_NONE); } void ipcp_Destroy(struct ipcp *ipcp) { throughput_destroy(&ipcp->throughput); if (ipcp->ns.resolv != NULL) { free(ipcp->ns.resolv); ipcp->ns.resolv = NULL; } if (ipcp->ns.resolv_nons != NULL) { free(ipcp->ns.resolv_nons); ipcp->ns.resolv_nons = NULL; } } void ipcp_SetLink(struct ipcp *ipcp, struct link *l) { ipcp->fsm.link = l; } void ipcp_Setup(struct ipcp *ipcp, u_int32_t mask) { struct iface *iface = ipcp->fsm.bundle->iface; struct ncpaddr ipaddr; struct in_addr peer; int pos; unsigned n; ipcp->fsm.open_mode = 0; ipcp->ifmask.s_addr = mask == INADDR_NONE ? ipcp->cfg.netmask.s_addr : mask; if (iplist_isvalid(&ipcp->cfg.peer_list)) { /* Try to give the peer a previously configured IP address */ for (n = 0; n < iface->addrs; n++) { if (!ncpaddr_getip4(&iface->addr[n].peer, &peer)) continue; if ((pos = iplist_ip2pos(&ipcp->cfg.peer_list, peer)) != -1) { ncpaddr_setip4(&ipaddr, iplist_setcurpos(&ipcp->cfg.peer_list, pos)); break; } } if (n == iface->addrs) /* Ok, so none of 'em fit.... pick a random one */ ncpaddr_setip4(&ipaddr, iplist_setrandpos(&ipcp->cfg.peer_list)); ncprange_sethost(&ipcp->cfg.peer_range, &ipaddr); } ipcp->heis1172 = 0; ipcp->peer_req = 0; ncprange_getip4addr(&ipcp->cfg.peer_range, &ipcp->peer_ip); ipcp->peer_compproto = 0; if (ipcp->cfg.HaveTriggerAddress) { /* * Some implementations of PPP require that we send a * *special* value as our address, even though the rfc specifies * full negotiation (e.g. "0.0.0.0" or Not "0.0.0.0"). */ ipcp->my_ip = ipcp->cfg.TriggerAddress; log_Printf(LogIPCP, "Using trigger address %s\n", inet_ntoa(ipcp->cfg.TriggerAddress)); } else { /* * Otherwise, if we've used an IP number before and it's still within * the network specified on the ``set ifaddr'' line, we really * want to keep that IP number so that we can keep any existing * connections that are bound to that IP. */ for (n = 0; n < iface->addrs; n++) { ncprange_getaddr(&iface->addr[n].ifa, &ipaddr); if (ncprange_contains(&ipcp->cfg.my_range, &ipaddr)) { ncpaddr_getip4(&ipaddr, &ipcp->my_ip); break; } } if (n == iface->addrs) ncprange_getip4addr(&ipcp->cfg.my_range, &ipcp->my_ip); } if (IsEnabled(ipcp->cfg.vj.neg) #ifndef NORADIUS || (ipcp->fsm.bundle->radius.valid && ipcp->fsm.bundle->radius.vj) #endif ) ipcp->my_compproto = (PROTO_VJCOMP << 16) + ((ipcp->cfg.vj.slots - 1) << 8) + ipcp->cfg.vj.slotcomp; else ipcp->my_compproto = 0; sl_compress_init(&ipcp->vj.cslc, ipcp->cfg.vj.slots - 1); ipcp->peer_reject = 0; ipcp->my_reject = 0; /* Copy startup values into ipcp->ns.dns */ if (ipcp->cfg.ns.dns[0].s_addr != INADDR_NONE) memcpy(ipcp->ns.dns, ipcp->cfg.ns.dns, sizeof ipcp->ns.dns); } static int numaddresses(struct in_addr mask) { u_int32_t bit, haddr; int n; haddr = ntohl(mask.s_addr); bit = 1; n = 1; do { if (!(haddr & bit)) n <<= 1; } while (bit <<= 1); return n; } static int ipcp_proxyarp(struct ipcp *ipcp, int (*proxyfun)(struct bundle *, struct in_addr), const struct iface_addr *addr) { struct bundle *bundle = ipcp->fsm.bundle; struct in_addr peer, mask, ip; int n, ret; if (!ncpaddr_getip4(&addr->peer, &peer)) { log_Printf(LogERROR, "Oops, ipcp_proxyarp() called with unexpected addr\n"); return 0; } ret = 0; if (Enabled(bundle, OPT_PROXYALL)) { ncprange_getip4mask(&addr->ifa, &mask); if ((n = numaddresses(mask)) > 256) { log_Printf(LogWARN, "%s: Too many addresses for proxyall\n", ncprange_ntoa(&addr->ifa)); return 0; } ip.s_addr = peer.s_addr & mask.s_addr; if (n >= 4) { ip.s_addr = htonl(ntohl(ip.s_addr) + 1); n -= 2; } while (n) { if (!((ip.s_addr ^ peer.s_addr) & mask.s_addr)) { if (!(ret = (*proxyfun)(bundle, ip))) break; n--; } ip.s_addr = htonl(ntohl(ip.s_addr) + 1); } ret = !n; } else if (Enabled(bundle, OPT_PROXY)) ret = (*proxyfun)(bundle, peer); return ret; } static int ipcp_SetIPaddress(struct ipcp *ipcp, struct in_addr myaddr, struct in_addr hisaddr) { struct bundle *bundle = ipcp->fsm.bundle; struct ncpaddr myncpaddr, hisncpaddr; struct ncprange myrange; struct in_addr mask; struct sockaddr_storage ssdst, ssgw, ssmask; struct sockaddr *sadst, *sagw, *samask; sadst = (struct sockaddr *)&ssdst; sagw = (struct sockaddr *)&ssgw; samask = (struct sockaddr *)&ssmask; ncpaddr_setip4(&hisncpaddr, hisaddr); ncpaddr_setip4(&myncpaddr, myaddr); ncprange_sethost(&myrange, &myncpaddr); mask = addr2mask(myaddr); if (ipcp->ifmask.s_addr != INADDR_ANY && (ipcp->ifmask.s_addr & mask.s_addr) == mask.s_addr) ncprange_setip4mask(&myrange, ipcp->ifmask); if (!iface_Add(bundle->iface, &bundle->ncp, &myrange, &hisncpaddr, IFACE_ADD_FIRST|IFACE_FORCE_ADD|IFACE_SYSTEM)) return 0; if (!Enabled(bundle, OPT_IFACEALIAS)) iface_Clear(bundle->iface, &bundle->ncp, AF_INET, IFACE_CLEAR_ALIASES|IFACE_SYSTEM); if (bundle->ncp.cfg.sendpipe > 0 || bundle->ncp.cfg.recvpipe > 0) { ncprange_getsa(&myrange, &ssgw, &ssmask); ncpaddr_getsa(&hisncpaddr, &ssdst); rt_Update(bundle, sadst, sagw, samask, NULL, NULL); } if (Enabled(bundle, OPT_SROUTES)) route_Change(bundle, bundle->ncp.route, &myncpaddr, &hisncpaddr); #ifndef NORADIUS if (bundle->radius.valid) route_Change(bundle, bundle->radius.routes, &myncpaddr, &hisncpaddr); #endif return 1; /* Ok */ } static struct in_addr ChooseHisAddr(struct bundle *bundle, struct in_addr gw) { struct in_addr try; u_long f; for (f = 0; f < bundle->ncp.ipcp.cfg.peer_list.nItems; f++) { try = iplist_next(&bundle->ncp.ipcp.cfg.peer_list); log_Printf(LogDEBUG, "ChooseHisAddr: Check item %ld (%s)\n", f, inet_ntoa(try)); if (ipcp_SetIPaddress(&bundle->ncp.ipcp, gw, try)) { log_Printf(LogIPCP, "Selected IP address %s\n", inet_ntoa(try)); break; } } if (f == bundle->ncp.ipcp.cfg.peer_list.nItems) { log_Printf(LogDEBUG, "ChooseHisAddr: All addresses in use !\n"); try.s_addr = INADDR_ANY; } return try; } static void IpcpInitRestartCounter(struct fsm *fp, int what) { /* Set fsm timer load */ struct ipcp *ipcp = fsm2ipcp(fp); fp->FsmTimer.load = ipcp->cfg.fsm.timeout * SECTICKS; switch (what) { case FSM_REQ_TIMER: fp->restart = ipcp->cfg.fsm.maxreq; break; case FSM_TRM_TIMER: fp->restart = ipcp->cfg.fsm.maxtrm; break; default: fp->restart = 1; break; } } static void IpcpSendConfigReq(struct fsm *fp) { /* Send config REQ please */ struct physical *p = link2physical(fp->link); struct ipcp *ipcp = fsm2ipcp(fp); u_char buff[MAX_FSM_OPT_LEN]; struct fsm_opt *o; o = (struct fsm_opt *)buff; if ((p && !physical_IsSync(p)) || !REJECTED(ipcp, TY_IPADDR)) { memcpy(o->data, &ipcp->my_ip.s_addr, 4); INC_FSM_OPT(TY_IPADDR, 6, o); } if (ipcp->my_compproto && !REJECTED(ipcp, TY_COMPPROTO)) { if (ipcp->heis1172) { u_int16_t proto = PROTO_VJCOMP; ua_htons(&proto, o->data); INC_FSM_OPT(TY_COMPPROTO, 4, o); } else { struct compreq req; req.proto = htons(ipcp->my_compproto >> 16); req.slots = (ipcp->my_compproto >> 8) & 255; req.compcid = ipcp->my_compproto & 1; memcpy(o->data, &req, 4); INC_FSM_OPT(TY_COMPPROTO, 6, o); } } if (IsEnabled(ipcp->cfg.ns.dns_neg)) { if (!REJECTED(ipcp, TY_PRIMARY_DNS - TY_ADJUST_NS)) { memcpy(o->data, &ipcp->ns.dns[0].s_addr, 4); INC_FSM_OPT(TY_PRIMARY_DNS, 6, o); } if (!REJECTED(ipcp, TY_SECONDARY_DNS - TY_ADJUST_NS)) { memcpy(o->data, &ipcp->ns.dns[1].s_addr, 4); INC_FSM_OPT(TY_SECONDARY_DNS, 6, o); } } fsm_Output(fp, CODE_CONFIGREQ, fp->reqid, buff, (u_char *)o - buff, MB_IPCPOUT); } static void IpcpSentTerminateReq(struct fsm *fp __unused) { /* Term REQ just sent by FSM */ } static void IpcpSendTerminateAck(struct fsm *fp, u_char id) { /* Send Term ACK please */ fsm_Output(fp, CODE_TERMACK, id, NULL, 0, MB_IPCPOUT); } static void IpcpLayerStart(struct fsm *fp) { /* We're about to start up ! */ struct ipcp *ipcp = fsm2ipcp(fp); log_Printf(LogIPCP, "%s: LayerStart.\n", fp->link->name); throughput_start(&ipcp->throughput, "IPCP throughput", Enabled(fp->bundle, OPT_THROUGHPUT)); fp->more.reqs = fp->more.naks = fp->more.rejs = ipcp->cfg.fsm.maxreq * 3; ipcp->peer_req = 0; } static void IpcpLayerFinish(struct fsm *fp) { /* We're now down */ struct ipcp *ipcp = fsm2ipcp(fp); log_Printf(LogIPCP, "%s: LayerFinish.\n", fp->link->name); throughput_stop(&ipcp->throughput); throughput_log(&ipcp->throughput, LogIPCP, NULL); } /* * Called from iface_Add() via ncp_IfaceAddrAdded() */ void ipcp_IfaceAddrAdded(struct ipcp *ipcp, const struct iface_addr *addr) { struct bundle *bundle = ipcp->fsm.bundle; if (Enabled(bundle, OPT_PROXY) || Enabled(bundle, OPT_PROXYALL)) ipcp_proxyarp(ipcp, arp_SetProxy, addr); } /* * Called from iface_Clear() and iface_Delete() via ncp_IfaceAddrDeleted() */ void ipcp_IfaceAddrDeleted(struct ipcp *ipcp, const struct iface_addr *addr) { struct bundle *bundle = ipcp->fsm.bundle; if (Enabled(bundle, OPT_PROXY) || Enabled(bundle, OPT_PROXYALL)) ipcp_proxyarp(ipcp, arp_ClearProxy, addr); } static void IpcpLayerDown(struct fsm *fp) { /* About to come down */ struct ipcp *ipcp = fsm2ipcp(fp); static int recursing; char addr[16]; if (!recursing++) { snprintf(addr, sizeof addr, "%s", inet_ntoa(ipcp->my_ip)); log_Printf(LogIPCP, "%s: LayerDown: %s\n", fp->link->name, addr); #ifndef NORADIUS radius_Flush(&fp->bundle->radius); radius_Account(&fp->bundle->radius, &fp->bundle->radacct, fp->bundle->links, RAD_STOP, &ipcp->throughput); if (*fp->bundle->radius.cfg.file && fp->bundle->radius.filterid) system_Select(fp->bundle, fp->bundle->radius.filterid, LINKDOWNFILE, NULL, NULL); radius_StopTimer(&fp->bundle->radius); #endif /* * XXX this stuff should really live in the FSM. Our config should * associate executable sections in files with events. */ if (system_Select(fp->bundle, addr, LINKDOWNFILE, NULL, NULL) < 0) { if (bundle_GetLabel(fp->bundle)) { if (system_Select(fp->bundle, bundle_GetLabel(fp->bundle), LINKDOWNFILE, NULL, NULL) < 0) system_Select(fp->bundle, "MYADDR", LINKDOWNFILE, NULL, NULL); } else system_Select(fp->bundle, "MYADDR", LINKDOWNFILE, NULL, NULL); } ipcp_Setup(ipcp, INADDR_NONE); } recursing--; } int ipcp_InterfaceUp(struct ipcp *ipcp) { if (!ipcp_SetIPaddress(ipcp, ipcp->my_ip, ipcp->peer_ip)) { log_Printf(LogERROR, "ipcp_InterfaceUp: unable to set ip address\n"); return 0; } if (!iface_SetFlags(ipcp->fsm.bundle->iface->name, IFF_UP)) { log_Printf(LogERROR, "ipcp_InterfaceUp: Can't set the IFF_UP flag on %s\n", ipcp->fsm.bundle->iface->name); return 0; } #ifndef NONAT if (ipcp->fsm.bundle->NatEnabled) LibAliasSetAddress(la, ipcp->my_ip); #endif return 1; } static int IpcpLayerUp(struct fsm *fp) { /* We're now up */ struct ipcp *ipcp = fsm2ipcp(fp); char tbuff[16]; log_Printf(LogIPCP, "%s: LayerUp.\n", fp->link->name); snprintf(tbuff, sizeof tbuff, "%s", inet_ntoa(ipcp->my_ip)); log_Printf(LogIPCP, "myaddr %s hisaddr = %s\n", tbuff, inet_ntoa(ipcp->peer_ip)); if (ipcp->peer_compproto >> 16 == PROTO_VJCOMP) sl_compress_init(&ipcp->vj.cslc, (ipcp->peer_compproto >> 8) & 255); if (!ipcp_InterfaceUp(ipcp)) return 0; #ifndef NORADIUS radius_Account_Set_Ip(&fp->bundle->radacct, &ipcp->peer_ip, &ipcp->ifmask); radius_Account(&fp->bundle->radius, &fp->bundle->radacct, fp->bundle->links, RAD_START, &ipcp->throughput); if (*fp->bundle->radius.cfg.file && fp->bundle->radius.filterid) system_Select(fp->bundle, fp->bundle->radius.filterid, LINKUPFILE, NULL, NULL); radius_StartTimer(fp->bundle); #endif /* * XXX this stuff should really live in the FSM. Our config should * associate executable sections in files with events. */ if (system_Select(fp->bundle, tbuff, LINKUPFILE, NULL, NULL) < 0) { if (bundle_GetLabel(fp->bundle)) { if (system_Select(fp->bundle, bundle_GetLabel(fp->bundle), LINKUPFILE, NULL, NULL) < 0) system_Select(fp->bundle, "MYADDR", LINKUPFILE, NULL, NULL); } else system_Select(fp->bundle, "MYADDR", LINKUPFILE, NULL, NULL); } fp->more.reqs = fp->more.naks = fp->more.rejs = ipcp->cfg.fsm.maxreq * 3; log_DisplayPrompts(); return 1; } static void ipcp_ValidateReq(struct ipcp *ipcp, struct in_addr ip, struct fsm_decode *dec) { struct bundle *bundle = ipcp->fsm.bundle; struct iface *iface = bundle->iface; struct in_addr myaddr, peer; unsigned n; if (iplist_isvalid(&ipcp->cfg.peer_list)) { ncprange_getip4addr(&ipcp->cfg.my_range, &myaddr); if (ip.s_addr == INADDR_ANY || iplist_ip2pos(&ipcp->cfg.peer_list, ip) < 0 || !ipcp_SetIPaddress(ipcp, myaddr, ip)) { log_Printf(LogIPCP, "%s: Address invalid or already in use\n", inet_ntoa(ip)); /* * If we've already had a valid address configured for the peer, * try NAKing with that so that we don't have to upset things * too much. */ for (n = 0; n < iface->addrs; n++) { if (!ncpaddr_getip4(&iface->addr[n].peer, &peer)) continue; if (iplist_ip2pos(&ipcp->cfg.peer_list, peer) >= 0) { ipcp->peer_ip = peer; break; } } if (n == iface->addrs) { /* Just pick an IP number from our list */ ipcp->peer_ip = ChooseHisAddr(bundle, myaddr); } if (ipcp->peer_ip.s_addr == INADDR_ANY) { *dec->rejend++ = TY_IPADDR; *dec->rejend++ = 6; memcpy(dec->rejend, &ip.s_addr, 4); dec->rejend += 4; } else { *dec->nakend++ = TY_IPADDR; *dec->nakend++ = 6; memcpy(dec->nakend, &ipcp->peer_ip.s_addr, 4); dec->nakend += 4; } return; } } else if (ip.s_addr == INADDR_ANY || !ncprange_containsip4(&ipcp->cfg.peer_range, ip)) { /* * If the destination address is not acceptable, NAK with what we * want to use. */ *dec->nakend++ = TY_IPADDR; *dec->nakend++ = 6; for (n = 0; n < iface->addrs; n++) if (ncprange_contains(&ipcp->cfg.peer_range, &iface->addr[n].peer)) { /* We prefer the already-configured address */ ncpaddr_getip4addr(&iface->addr[n].peer, (u_int32_t *)dec->nakend); break; } if (n == iface->addrs) memcpy(dec->nakend, &ipcp->peer_ip.s_addr, 4); dec->nakend += 4; return; } ipcp->peer_ip = ip; *dec->ackend++ = TY_IPADDR; *dec->ackend++ = 6; memcpy(dec->ackend, &ip.s_addr, 4); dec->ackend += 4; } static void IpcpDecodeConfig(struct fsm *fp, u_char *cp, u_char *end, int mode_type, struct fsm_decode *dec) { /* Deal with incoming PROTO_IPCP */ struct ncpaddr ncpaddr; struct ipcp *ipcp = fsm2ipcp(fp); int gotdnsnak; u_int32_t compproto; struct compreq pcomp; struct in_addr ipaddr, dstipaddr, have_ip; char tbuff[100], tbuff2[100]; struct fsm_opt *opt, nak; gotdnsnak = 0; while (end - cp >= (int)sizeof(opt->hdr)) { if ((opt = fsm_readopt(&cp)) == NULL) break; snprintf(tbuff, sizeof tbuff, " %s[%d]", protoname(opt->hdr.id), opt->hdr.len); switch (opt->hdr.id) { case TY_IPADDR: /* RFC1332 */ memcpy(&ipaddr.s_addr, opt->data, 4); log_Printf(LogIPCP, "%s %s\n", tbuff, inet_ntoa(ipaddr)); switch (mode_type) { case MODE_REQ: ipcp->peer_req = 1; ipcp_ValidateReq(ipcp, ipaddr, dec); break; case MODE_NAK: if (ncprange_containsip4(&ipcp->cfg.my_range, ipaddr)) { /* Use address suggested by peer */ snprintf(tbuff2, sizeof tbuff2, "%s changing address: %s ", tbuff, inet_ntoa(ipcp->my_ip)); log_Printf(LogIPCP, "%s --> %s\n", tbuff2, inet_ntoa(ipaddr)); ipcp->my_ip = ipaddr; ncpaddr_setip4(&ncpaddr, ipcp->my_ip); bundle_AdjustFilters(fp->bundle, &ncpaddr, NULL); } else { log_Printf(log_IsKept(LogIPCP) ? LogIPCP : LogPHASE, "%s: Unacceptable address!\n", inet_ntoa(ipaddr)); fsm_Close(&ipcp->fsm); } break; case MODE_REJ: ipcp->peer_reject |= (1 << opt->hdr.id); break; } break; case TY_COMPPROTO: memcpy(&pcomp, opt->data, sizeof pcomp); compproto = (ntohs(pcomp.proto) << 16) + ((int)pcomp.slots << 8) + pcomp.compcid; log_Printf(LogIPCP, "%s %s\n", tbuff, vj2asc(compproto)); switch (mode_type) { case MODE_REQ: if (!IsAccepted(ipcp->cfg.vj.neg)) fsm_rej(dec, opt); else { switch (opt->hdr.len) { case 4: /* RFC1172 */ if (ntohs(pcomp.proto) == PROTO_VJCOMP) { log_Printf(LogWARN, "Peer is speaking RFC1172 compression " "protocol !\n"); ipcp->heis1172 = 1; ipcp->peer_compproto = compproto; fsm_ack(dec, opt); } else { pcomp.proto = htons(PROTO_VJCOMP); nak.hdr.id = TY_COMPPROTO; nak.hdr.len = 4; memcpy(nak.data, &pcomp, 2); fsm_nak(dec, &nak); } break; case 6: /* RFC1332 */ if (ntohs(pcomp.proto) == PROTO_VJCOMP) { /* We know pcomp.slots' max value == MAX_VJ_STATES */ if (pcomp.slots >= MIN_VJ_STATES) { /* Ok, we can do that */ ipcp->peer_compproto = compproto; ipcp->heis1172 = 0; fsm_ack(dec, opt); } else { /* Get as close as we can to what he wants */ ipcp->heis1172 = 0; pcomp.slots = MIN_VJ_STATES; nak.hdr.id = TY_COMPPROTO; nak.hdr.len = 4; memcpy(nak.data, &pcomp, 2); fsm_nak(dec, &nak); } } else { /* What we really want */ pcomp.proto = htons(PROTO_VJCOMP); pcomp.slots = DEF_VJ_STATES; pcomp.compcid = 1; nak.hdr.id = TY_COMPPROTO; nak.hdr.len = 6; memcpy(nak.data, &pcomp, sizeof pcomp); fsm_nak(dec, &nak); } break; default: fsm_rej(dec, opt); break; } } break; case MODE_NAK: if (ntohs(pcomp.proto) == PROTO_VJCOMP) { /* We know pcomp.slots' max value == MAX_VJ_STATES */ if (pcomp.slots < MIN_VJ_STATES) pcomp.slots = MIN_VJ_STATES; compproto = (ntohs(pcomp.proto) << 16) + (pcomp.slots << 8) + pcomp.compcid; } else compproto = 0; log_Printf(LogIPCP, "%s changing compproto: %08x --> %08x\n", tbuff, ipcp->my_compproto, compproto); ipcp->my_compproto = compproto; break; case MODE_REJ: ipcp->peer_reject |= (1 << opt->hdr.id); break; } break; case TY_IPADDRS: /* RFC1172 */ memcpy(&ipaddr.s_addr, opt->data, 4); memcpy(&dstipaddr.s_addr, opt->data + 4, 4); snprintf(tbuff2, sizeof tbuff2, "%s %s,", tbuff, inet_ntoa(ipaddr)); log_Printf(LogIPCP, "%s %s\n", tbuff2, inet_ntoa(dstipaddr)); switch (mode_type) { case MODE_REQ: fsm_rej(dec, opt); break; case MODE_NAK: case MODE_REJ: break; } break; case TY_PRIMARY_DNS: /* DNS negotiation (rfc1877) */ case TY_SECONDARY_DNS: memcpy(&ipaddr.s_addr, opt->data, 4); log_Printf(LogIPCP, "%s %s\n", tbuff, inet_ntoa(ipaddr)); switch (mode_type) { case MODE_REQ: if (!IsAccepted(ipcp->cfg.ns.dns_neg)) { ipcp->my_reject |= (1 << (opt->hdr.id - TY_ADJUST_NS)); fsm_rej(dec, opt); break; } have_ip = ipcp->ns.dns[opt->hdr.id == TY_PRIMARY_DNS ? 0 : 1]; if (opt->hdr.id == TY_PRIMARY_DNS && ipaddr.s_addr != have_ip.s_addr && ipaddr.s_addr == ipcp->ns.dns[1].s_addr) { /* Swap 'em 'round */ ipcp->ns.dns[0] = ipcp->ns.dns[1]; ipcp->ns.dns[1] = have_ip; have_ip = ipcp->ns.dns[0]; } if (ipaddr.s_addr != have_ip.s_addr) { /* * The client has got the DNS stuff wrong (first request) so * we'll tell 'em how it is */ nak.hdr.id = opt->hdr.id; nak.hdr.len = 6; memcpy(nak.data, &have_ip.s_addr, 4); fsm_nak(dec, &nak); } else { /* * Otherwise they have it right (this time) so we send an ack packet * back confirming it... end of story */ fsm_ack(dec, opt); } break; case MODE_NAK: if (IsEnabled(ipcp->cfg.ns.dns_neg)) { gotdnsnak = 1; memcpy(&ipcp->ns.dns[opt->hdr.id == TY_PRIMARY_DNS ? 0 : 1].s_addr, opt->data, 4); } break; case MODE_REJ: /* Can't do much, stop asking */ ipcp->peer_reject |= (1 << (opt->hdr.id - TY_ADJUST_NS)); break; } break; case TY_PRIMARY_NBNS: /* M$ NetBIOS nameserver hack (rfc1877) */ case TY_SECONDARY_NBNS: memcpy(&ipaddr.s_addr, opt->data, 4); log_Printf(LogIPCP, "%s %s\n", tbuff, inet_ntoa(ipaddr)); switch (mode_type) { case MODE_REQ: have_ip.s_addr = ipcp->cfg.ns.nbns[opt->hdr.id == TY_PRIMARY_NBNS ? 0 : 1].s_addr; if (have_ip.s_addr == INADDR_ANY) { log_Printf(LogIPCP, "NBNS REQ - rejected - nbns not set\n"); ipcp->my_reject |= (1 << (opt->hdr.id - TY_ADJUST_NS)); fsm_rej(dec, opt); break; } if (ipaddr.s_addr != have_ip.s_addr) { nak.hdr.id = opt->hdr.id; nak.hdr.len = 6; memcpy(nak.data, &have_ip.s_addr, 4); fsm_nak(dec, &nak); } else fsm_ack(dec, opt); break; case MODE_NAK: log_Printf(LogIPCP, "MS NBNS req %d - NAK??\n", opt->hdr.id); break; case MODE_REJ: log_Printf(LogIPCP, "MS NBNS req %d - REJ??\n", opt->hdr.id); break; } break; default: if (mode_type != MODE_NOP) { ipcp->my_reject |= (1 << opt->hdr.id); fsm_rej(dec, opt); } break; } } if (gotdnsnak) { if (ipcp->ns.writable) { log_Printf(LogDEBUG, "Updating resolver\n"); if (!ipcp_WriteDNS(ipcp)) { ipcp->peer_reject |= (1 << (TY_PRIMARY_DNS - TY_ADJUST_NS)); ipcp->peer_reject |= (1 << (TY_SECONDARY_DNS - TY_ADJUST_NS)); } else bundle_AdjustDNS(fp->bundle); } else { log_Printf(LogDEBUG, "Not updating resolver (readonly)\n"); bundle_AdjustDNS(fp->bundle); } } if (mode_type != MODE_NOP) { if (mode_type == MODE_REQ && !ipcp->peer_req) { if (dec->rejend == dec->rej && dec->nakend == dec->nak) { /* * Pretend the peer has requested an IP. * We do this to ensure that we only send one NAK if the only * reason for the NAK is because the peer isn't sending a * TY_IPADDR REQ. This stops us from repeatedly trying to tell * the peer that we have to have an IP address on their end. */ ipcp->peer_req = 1; } ipaddr.s_addr = INADDR_ANY; ipcp_ValidateReq(ipcp, ipaddr, dec); } fsm_opt_normalise(dec); } } extern struct mbuf * ipcp_Input(struct bundle *bundle, struct link *l, struct mbuf *bp) { /* Got PROTO_IPCP from link */ m_settype(bp, MB_IPCPIN); if (bundle_Phase(bundle) == PHASE_NETWORK) fsm_Input(&bundle->ncp.ipcp.fsm, bp); else { if (bundle_Phase(bundle) < PHASE_NETWORK) log_Printf(LogIPCP, "%s: Error: Unexpected IPCP in phase %s (ignored)\n", l->name, bundle_PhaseName(bundle)); m_freem(bp); } return NULL; } int ipcp_UseHisIPaddr(struct bundle *bundle, struct in_addr hisaddr) { struct ipcp *ipcp = &bundle->ncp.ipcp; struct in_addr myaddr; memset(&ipcp->cfg.peer_range, '\0', sizeof ipcp->cfg.peer_range); iplist_reset(&ipcp->cfg.peer_list); ipcp->peer_ip = hisaddr; ncprange_setip4host(&ipcp->cfg.peer_range, hisaddr); ncprange_getip4addr(&ipcp->cfg.my_range, &myaddr); return ipcp_SetIPaddress(ipcp, myaddr, hisaddr); } int ipcp_UseHisaddr(struct bundle *bundle, const char *hisaddr, int setaddr) { struct in_addr myaddr; struct ncp *ncp = &bundle->ncp; struct ipcp *ipcp = &ncp->ipcp; struct ncpaddr ncpaddr; /* Use `hisaddr' for the peers address (set iface if `setaddr') */ memset(&ipcp->cfg.peer_range, '\0', sizeof ipcp->cfg.peer_range); iplist_reset(&ipcp->cfg.peer_list); if (strpbrk(hisaddr, ",-")) { iplist_setsrc(&ipcp->cfg.peer_list, hisaddr); if (iplist_isvalid(&ipcp->cfg.peer_list)) { iplist_setrandpos(&ipcp->cfg.peer_list); ipcp->peer_ip = ChooseHisAddr(bundle, ipcp->my_ip); if (ipcp->peer_ip.s_addr == INADDR_ANY) { log_Printf(LogWARN, "%s: None available !\n", ipcp->cfg.peer_list.src); return 0; } ncprange_setip4host(&ipcp->cfg.peer_range, ipcp->peer_ip); } else { log_Printf(LogWARN, "%s: Invalid range !\n", hisaddr); return 0; } } else if (ncprange_aton(&ipcp->cfg.peer_range, ncp, hisaddr) != 0) { if (ncprange_family(&ipcp->cfg.my_range) != AF_INET) { log_Printf(LogWARN, "%s: Not an AF_INET address !\n", hisaddr); return 0; } ncprange_getip4addr(&ipcp->cfg.my_range, &myaddr); ncprange_getip4addr(&ipcp->cfg.peer_range, &ipcp->peer_ip); if (setaddr && !ipcp_SetIPaddress(ipcp, myaddr, ipcp->peer_ip)) return 0; } else return 0; ncpaddr_setip4(&ncpaddr, ipcp->peer_ip); bundle_AdjustFilters(bundle, NULL, &ncpaddr); return 1; /* Ok */ } struct in_addr addr2mask(struct in_addr addr) { u_int32_t haddr = ntohl(addr.s_addr); haddr = IN_CLASSA(haddr) ? IN_CLASSA_NET : IN_CLASSB(haddr) ? IN_CLASSB_NET : IN_CLASSC_NET; addr.s_addr = htonl(haddr); return addr; } size_t ipcp_QueueLen(struct ipcp *ipcp) { struct mqueue *q; size_t result; result = 0; for (q = ipcp->Queue; q < ipcp->Queue + IPCP_QUEUES(ipcp); q++) result += q->len; return result; } int ipcp_PushPacket(struct ipcp *ipcp, struct link *l) { struct bundle *bundle = ipcp->fsm.bundle; struct mqueue *queue; struct mbuf *bp; int m_len; u_int32_t secs = 0; unsigned alivesecs = 0; if (ipcp->fsm.state != ST_OPENED) return 0; /* * If ccp is not open but is required, do nothing. */ if (l->ccp.fsm.state != ST_OPENED && ccp_Required(&l->ccp)) { log_Printf(LogPHASE, "%s: Not transmitting... waiting for CCP\n", l->name); return 0; } queue = ipcp->Queue + IPCP_QUEUES(ipcp) - 1; do { if (queue->top) { bp = m_dequeue(queue); bp = mbuf_Read(bp, &secs, sizeof secs); bp = m_pullup(bp); m_len = m_length(bp); if (!FilterCheck(MBUF_CTOP(bp), AF_INET, &bundle->filter.alive, &alivesecs)) { if (secs == 0) secs = alivesecs; bundle_StartIdleTimer(bundle, secs); } link_PushPacket(l, bp, bundle, 0, PROTO_IP); ipcp_AddOutOctets(ipcp, m_len); return 1; } } while (queue-- != ipcp->Queue); return 0; }