| /*- |
| * 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. |
| * |
| * $FreeBSD: src/usr.sbin/ppp/ipcp.c,v 1.123.24.1 2010/12/21 17:10:29 kensmith Exp $ |
| */ |
| |
| #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 *); |
| |
| 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); |
| |
| 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); |
| } |
| |
| 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) |
| PacketAliasSetAddress(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; |
| } |
