/* * Copyright 1999 Internet Business Solutions Ltd., Switzerland * 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. * * $FreeBSD$ * */ #include #include #include #include #include #include #include #include #ifdef LOCALRAD #include "radlib.h" #else #include #endif #include #include #include #include #include #include #include #include #include #include "layer.h" #include "defs.h" #include "log.h" #include "descriptor.h" #include "prompt.h" #include "timer.h" #include "fsm.h" #include "iplist.h" #include "slcompress.h" #include "throughput.h" #include "lqr.h" #include "hdlc.h" #include "mbuf.h" #include "ipcp.h" #include "route.h" #include "command.h" #include "filter.h" #include "lcp.h" #include "ccp.h" #include "link.h" #include "mp.h" #include "radius.h" #include "auth.h" #include "async.h" #include "physical.h" #include "chat.h" #include "cbcp.h" #include "chap.h" #include "datalink.h" #include "bundle.h" /* * rad_continue_send_request() has given us `got' (non-zero). Deal with it. */ static void radius_Process(struct radius *r, int got) { char *argv[MAXARGS], *nuke; struct bundle *bundle; int argc, addrs; size_t len; struct in_range dest; struct in_addr gw; const void *data; const char *stype; r->cx.fd = -1; /* Stop select()ing */ stype = r->cx.auth ? "auth" : "acct"; switch (got) { case RAD_ACCESS_ACCEPT: log_Printf(LogPHASE, "Radius(%s): ACCEPT received\n", stype); if (!r->cx.auth) { rad_close(r->cx.rad); return; } break; case RAD_ACCESS_REJECT: log_Printf(LogPHASE, "Radius(%s): REJECT received\n", stype); if (r->cx.auth) auth_Failure(r->cx.auth); rad_close(r->cx.rad); return; case RAD_ACCESS_CHALLENGE: /* we can't deal with this (for now) ! */ log_Printf(LogPHASE, "Radius: CHALLENGE received (can't handle yet)\n"); if (r->cx.auth) auth_Failure(r->cx.auth); rad_close(r->cx.rad); return; case RAD_ACCOUNTING_RESPONSE: log_Printf(LogPHASE, "Radius(%s): Accounting response received\n", stype); if (r->cx.auth) auth_Failure(r->cx.auth); /* unexpected !!! */ /* No further processing for accounting requests, please */ rad_close(r->cx.rad); return; case -1: log_Printf(LogPHASE, "radius(%s): %s\n", stype, rad_strerror(r->cx.rad)); if (r->cx.auth) auth_Failure(r->cx.auth); rad_close(r->cx.rad); return; default: log_Printf(LogERROR, "rad_send_request(%s): Failed %d: %s\n", stype, got, rad_strerror(r->cx.rad)); if (r->cx.auth) auth_Failure(r->cx.auth); rad_close(r->cx.rad); return; } /* So we've been accepted ! Let's see what we've got in our reply :-I */ r->ip.s_addr = r->mask.s_addr = INADDR_NONE; r->mtu = 0; r->vj = 0; while ((got = rad_get_attr(r->cx.rad, &data, &len)) > 0) { switch (got) { case RAD_FRAMED_IP_ADDRESS: r->ip = rad_cvt_addr(data); log_Printf(LogPHASE, " IP %s\n", inet_ntoa(r->ip)); break; case RAD_FRAMED_IP_NETMASK: r->mask = rad_cvt_addr(data); log_Printf(LogPHASE, " Netmask %s\n", inet_ntoa(r->mask)); break; case RAD_FRAMED_MTU: r->mtu = rad_cvt_int(data); log_Printf(LogPHASE, " MTU %lu\n", r->mtu); break; case RAD_FRAMED_ROUTING: /* Disabled for now - should we automatically set up some filters ? */ /* rad_cvt_int(data); */ /* bit 1 = Send routing packets */ /* bit 2 = Receive routing packets */ break; case RAD_FRAMED_COMPRESSION: r->vj = rad_cvt_int(data) == 1 ? 1 : 0; log_Printf(LogPHASE, " VJ %sabled\n", r->vj ? "en" : "dis"); break; case RAD_FRAMED_ROUTE: /* * We expect a string of the format ``dest[/bits] gw [metrics]'' * Any specified metrics are ignored. MYADDR and HISADDR are * understood for ``dest'' and ``gw'' and ``0.0.0.0'' is the same * as ``HISADDR''. */ if ((nuke = rad_cvt_string(data, len)) == NULL) { log_Printf(LogERROR, "rad_cvt_string: %s\n", rad_strerror(r->cx.rad)); rad_close(r->cx.rad); return; } log_Printf(LogPHASE, " Route: %s\n", nuke); bundle = r->cx.auth->physical->dl->bundle; dest.ipaddr.s_addr = dest.mask.s_addr = INADDR_ANY; dest.width = 0; argc = command_Interpret(nuke, strlen(nuke), argv); if (argc < 0) log_Printf(LogWARN, "radius: %s: Syntax error\n", argc == 1 ? argv[0] : "\"\""); else if (argc < 2) log_Printf(LogWARN, "radius: %s: Invalid route\n", argc == 1 ? argv[0] : "\"\""); else if ((strcasecmp(argv[0], "default") != 0 && !ParseAddr(&bundle->ncp.ipcp, argv[0], &dest.ipaddr, &dest.mask, &dest.width)) || !ParseAddr(&bundle->ncp.ipcp, argv[1], &gw, NULL, NULL)) log_Printf(LogWARN, "radius: %s %s: Invalid route\n", argv[0], argv[1]); else { if (dest.width == 32 && strchr(argv[0], '/') == NULL) /* No mask specified - use the natural mask */ dest.mask = addr2mask(dest.ipaddr); addrs = 0; if (!strncasecmp(argv[0], "HISADDR", 7)) addrs = ROUTE_DSTHISADDR; else if (!strncasecmp(argv[0], "MYADDR", 6)) addrs = ROUTE_DSTMYADDR; if (gw.s_addr == INADDR_ANY) { addrs |= ROUTE_GWHISADDR; gw = bundle->ncp.ipcp.peer_ip; } else if (strcasecmp(argv[1], "HISADDR") == 0) addrs |= ROUTE_GWHISADDR; route_Add(&r->routes, addrs, dest.ipaddr, dest.mask, gw); } free(nuke); break; } } if (got == -1) { log_Printf(LogERROR, "rad_get_attr: %s (failing!)\n", rad_strerror(r->cx.rad)); auth_Failure(r->cx.auth); rad_close(r->cx.rad); } else { r->valid = 1; auth_Success(r->cx.auth); rad_close(r->cx.rad); } } /* * We've either timed out or select()ed on the read descriptor */ static void radius_Continue(struct radius *r, int sel) { struct timeval tv; int got; timer_Stop(&r->cx.timer); if ((got = rad_continue_send_request(r->cx.rad, sel, &r->cx.fd, &tv)) == 0) { log_Printf(LogPHASE, "Radius: Request re-sent\n"); r->cx.timer.load = tv.tv_usec / TICKUNIT + tv.tv_sec * SECTICKS; timer_Start(&r->cx.timer); return; } radius_Process(r, got); } /* * Time to call rad_continue_send_request() - timed out. */ static void radius_Timeout(void *v) { radius_Continue((struct radius *)v, 0); } /* * Time to call rad_continue_send_request() - something to read. */ static void radius_Read(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset) { radius_Continue(descriptor2radius(d), 1); } /* * Behave as a struct fdescriptor (descriptor.h) */ static int radius_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n) { struct radius *rad = descriptor2radius(d); if (r && rad->cx.fd != -1) { FD_SET(rad->cx.fd, r); if (*n < rad->cx.fd + 1) *n = rad->cx.fd + 1; log_Printf(LogTIMER, "Radius: fdset(r) %d\n", rad->cx.fd); return 1; } return 0; } /* * Behave as a struct fdescriptor (descriptor.h) */ static int radius_IsSet(struct fdescriptor *d, const fd_set *fdset) { struct radius *r = descriptor2radius(d); return r && r->cx.fd != -1 && FD_ISSET(r->cx.fd, fdset); } /* * Behave as a struct fdescriptor (descriptor.h) */ static int radius_Write(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset) { /* We never want to write here ! */ log_Printf(LogALERT, "radius_Write: Internal error: Bad call !\n"); return 0; } /* * Initialise ourselves */ void radius_Init(struct radius *r) { r->valid = 0; r->cx.fd = -1; *r->cfg.file = '\0';; r->desc.type = RADIUS_DESCRIPTOR; r->desc.UpdateSet = radius_UpdateSet; r->desc.IsSet = radius_IsSet; r->desc.Read = radius_Read; r->desc.Write = radius_Write; memset(&r->cx.timer, '\0', sizeof r->cx.timer); log_Printf(LogDEBUG, "Radius: radius_Init\n"); } /* * Forget everything and go back to initialised state. */ void radius_Destroy(struct radius *r) { r->valid = 0; log_Printf(LogDEBUG, "Radius: radius_Destroy\n"); timer_Stop(&r->cx.timer); route_DeleteAll(&r->routes); if (r->cx.fd != -1) { r->cx.fd = -1; rad_close(r->cx.rad); } } /* * Start an authentication request to the RADIUS server. */ void radius_Authenticate(struct radius *r, struct authinfo *authp, const char *name, const char *key, int klen, const char *challenge, int clen) { struct ttyent *ttyp; struct timeval tv; int got, slot; char hostname[MAXHOSTNAMELEN]; struct hostent *hp; struct in_addr hostaddr; if (!*r->cfg.file) return; if (r->cx.fd != -1) /* * We assume that our name/key/challenge is the same as last time, * and just continue to wait for the RADIUS server(s). */ return; radius_Destroy(r); if ((r->cx.rad = rad_auth_open()) == NULL) { log_Printf(LogERROR, "rad_auth_open: %s\n", strerror(errno)); return; } if (rad_config(r->cx.rad, r->cfg.file) != 0) { log_Printf(LogERROR, "rad_config: %s\n", rad_strerror(r->cx.rad)); rad_close(r->cx.rad); return; } if (rad_create_request(r->cx.rad, RAD_ACCESS_REQUEST) != 0) { log_Printf(LogERROR, "rad_create_request: %s\n", rad_strerror(r->cx.rad)); rad_close(r->cx.rad); return; } if (rad_put_string(r->cx.rad, RAD_USER_NAME, name) != 0 || rad_put_int(r->cx.rad, RAD_SERVICE_TYPE, RAD_FRAMED) != 0 || rad_put_int(r->cx.rad, RAD_FRAMED_PROTOCOL, RAD_PPP) != 0) { log_Printf(LogERROR, "rad_put: %s\n", rad_strerror(r->cx.rad)); rad_close(r->cx.rad); return; } if (challenge != NULL) { /* We're talking CHAP */ if (rad_put_attr(r->cx.rad, RAD_CHAP_PASSWORD, key, klen) != 0 || rad_put_attr(r->cx.rad, RAD_CHAP_CHALLENGE, challenge, clen) != 0) { log_Printf(LogERROR, "CHAP: rad_put_string: %s\n", rad_strerror(r->cx.rad)); rad_close(r->cx.rad); return; } } else if (rad_put_attr(r->cx.rad, RAD_USER_PASSWORD, key, klen) != 0) { /* We're talking PAP */ log_Printf(LogERROR, "PAP: rad_put_string: %s\n", rad_strerror(r->cx.rad)); rad_close(r->cx.rad); return; } if (gethostname(hostname, sizeof hostname) != 0) log_Printf(LogERROR, "rad_put: gethostname(): %s\n", strerror(errno)); else { if ((hp = gethostbyname(hostname)) != NULL) { hostaddr.s_addr = *(u_long *)hp->h_addr; if (rad_put_addr(r->cx.rad, RAD_NAS_IP_ADDRESS, hostaddr) != 0) { log_Printf(LogERROR, "rad_put: rad_put_string: %s\n", rad_strerror(r->cx.rad)); rad_close(r->cx.rad); return; } } if (rad_put_string(r->cx.rad, RAD_NAS_IDENTIFIER, hostname) != 0) { log_Printf(LogERROR, "rad_put: rad_put_string: %s\n", rad_strerror(r->cx.rad)); rad_close(r->cx.rad); return; } } if (authp->physical->handler && authp->physical->handler->type == TTY_DEVICE) { setttyent(); for (slot = 1; (ttyp = getttyent()); ++slot) if (!strcmp(ttyp->ty_name, authp->physical->name.base)) { if(rad_put_int(r->cx.rad, RAD_NAS_PORT, slot) != 0) { log_Printf(LogERROR, "rad_put: rad_put_string: %s\n", rad_strerror(r->cx.rad)); rad_close(r->cx.rad); endttyent(); return; } break; } endttyent(); } r->cx.auth = authp; if ((got = rad_init_send_request(r->cx.rad, &r->cx.fd, &tv))) radius_Process(r, got); else { log_Printf(LogPHASE, "Radius: Request sent\n"); log_Printf(LogDEBUG, "Using radius_Timeout [%p]\n", radius_Timeout); r->cx.timer.load = tv.tv_usec / TICKUNIT + tv.tv_sec * SECTICKS; r->cx.timer.func = radius_Timeout; r->cx.timer.name = "radius auth"; r->cx.timer.arg = r; timer_Start(&r->cx.timer); } } /* * Send an accounting request to the RADIUS server */ void radius_Account(struct radius *r, struct radacct *ac, struct datalink *dl, int acct_type, struct in_addr *peer_ip, struct in_addr *netmask, struct pppThroughput *stats) { struct ttyent *ttyp; struct timeval tv; int got, slot; char hostname[MAXHOSTNAMELEN]; struct hostent *hp; struct in_addr hostaddr; if (!*r->cfg.file) return; if (r->cx.fd != -1) /* * We assume that our name/key/challenge is the same as last time, * and just continue to wait for the RADIUS server(s). */ return; radius_Destroy(r); if ((r->cx.rad = rad_acct_open()) == NULL) { log_Printf(LogERROR, "rad_auth_open: %s\n", strerror(errno)); return; } if (rad_config(r->cx.rad, r->cfg.file) != 0) { log_Printf(LogERROR, "rad_config: %s\n", rad_strerror(r->cx.rad)); rad_close(r->cx.rad); return; } if (rad_create_request(r->cx.rad, RAD_ACCOUNTING_REQUEST) != 0) { log_Printf(LogERROR, "rad_create_request: %s\n", rad_strerror(r->cx.rad)); rad_close(r->cx.rad); return; } /* Grab some accounting data and initialize structure */ if (acct_type == RAD_START) { ac->rad_parent = r; /* Fetch username from datalink */ strncpy(ac->user_name, dl->peer.authname, sizeof ac->user_name); ac->user_name[AUTHLEN-1] = '\0'; ac->authentic = 2; /* Assume RADIUS verified auth data */ /* Generate a session ID */ snprintf(ac->session_id, sizeof ac->session_id, "%s%d-%s%lu", dl->bundle->cfg.auth.name, (int)getpid(), dl->peer.authname, (unsigned long)stats->uptime); /* And grab our MP socket name */ snprintf(ac->multi_session_id, sizeof ac->multi_session_id, "%s", dl->bundle->ncp.mp.active ? dl->bundle->ncp.mp.server.socket.sun_path : ""); /* Fetch IP, netmask from IPCP */ memcpy(&ac->ip, peer_ip, sizeof(ac->ip)); memcpy(&ac->mask, netmask, sizeof(ac->mask)); }; if (rad_put_string(r->cx.rad, RAD_USER_NAME, ac->user_name) != 0 || rad_put_int(r->cx.rad, RAD_SERVICE_TYPE, RAD_FRAMED) != 0 || rad_put_int(r->cx.rad, RAD_FRAMED_PROTOCOL, RAD_PPP) != 0 || rad_put_addr(r->cx.rad, RAD_FRAMED_IP_ADDRESS, ac->ip) != 0 || rad_put_addr(r->cx.rad, RAD_FRAMED_IP_NETMASK, ac->mask) != 0) { log_Printf(LogERROR, "rad_put: %s\n", rad_strerror(r->cx.rad)); rad_close(r->cx.rad); return; } if (gethostname(hostname, sizeof hostname) != 0) log_Printf(LogERROR, "rad_put: gethostname(): %s\n", strerror(errno)); else { if ((hp = gethostbyname(hostname)) != NULL) { hostaddr.s_addr = *(u_long *)hp->h_addr; if (rad_put_addr(r->cx.rad, RAD_NAS_IP_ADDRESS, hostaddr) != 0) { log_Printf(LogERROR, "rad_put: rad_put_string: %s\n", rad_strerror(r->cx.rad)); rad_close(r->cx.rad); return; } } if (rad_put_string(r->cx.rad, RAD_NAS_IDENTIFIER, hostname) != 0) { log_Printf(LogERROR, "rad_put: rad_put_string: %s\n", rad_strerror(r->cx.rad)); rad_close(r->cx.rad); return; } } if (dl->physical->handler && dl->physical->handler->type == TTY_DEVICE) { setttyent(); for (slot = 1; (ttyp = getttyent()); ++slot) if (!strcmp(ttyp->ty_name, dl->physical->name.base)) { if(rad_put_int(r->cx.rad, RAD_NAS_PORT, slot) != 0) { log_Printf(LogERROR, "rad_put: rad_put_string: %s\n", rad_strerror(r->cx.rad)); rad_close(r->cx.rad); endttyent(); return; } break; } endttyent(); } if (rad_put_int(r->cx.rad, RAD_ACCT_STATUS_TYPE, acct_type) != 0 || rad_put_string(r->cx.rad, RAD_ACCT_SESSION_ID, ac->session_id) != 0 || rad_put_string(r->cx.rad, RAD_ACCT_MULTI_SESSION_ID, ac->multi_session_id) != 0 || rad_put_int(r->cx.rad, RAD_ACCT_DELAY_TIME, 0) != 0) { /* XXX ACCT_DELAY_TIME should be increased each time a packet is waiting */ log_Printf(LogERROR, "rad_put: %s\n", rad_strerror(r->cx.rad)); rad_close(r->cx.rad); return; } if (acct_type == RAD_STOP) /* Show some statistics */ if (rad_put_int(r->cx.rad, RAD_ACCT_INPUT_OCTETS, stats->OctetsIn) != 0 || rad_put_int(r->cx.rad, RAD_ACCT_INPUT_PACKETS, stats->PacketsIn) != 0 || rad_put_int(r->cx.rad, RAD_ACCT_OUTPUT_OCTETS, stats->OctetsOut) != 0 || rad_put_int(r->cx.rad, RAD_ACCT_OUTPUT_PACKETS, stats->PacketsOut) != 0 || rad_put_int(r->cx.rad, RAD_ACCT_SESSION_TIME, throughput_uptime(stats)) != 0) { log_Printf(LogERROR, "rad_put: %s\n", rad_strerror(r->cx.rad)); rad_close(r->cx.rad); return; } r->cx.auth = NULL; /* Not valid for accounting requests */ if ((got = rad_init_send_request(r->cx.rad, &r->cx.fd, &tv))) radius_Process(r, got); else { log_Printf(LogDEBUG, "Using radius_Timeout [%p]\n", radius_Timeout); r->cx.timer.load = tv.tv_usec / TICKUNIT + tv.tv_sec * SECTICKS; r->cx.timer.func = radius_Timeout; r->cx.timer.name = "radius acct"; r->cx.timer.arg = r; timer_Start(&r->cx.timer); } } /* * How do things look at the moment ? */ void radius_Show(struct radius *r, struct prompt *p) { prompt_Printf(p, " Radius config: %s", *r->cfg.file ? r->cfg.file : "none"); if (r->valid) { prompt_Printf(p, "\n IP: %s\n", inet_ntoa(r->ip)); prompt_Printf(p, " Netmask: %s\n", inet_ntoa(r->mask)); prompt_Printf(p, " MTU: %lu\n", r->mtu); prompt_Printf(p, " VJ: %sabled\n", r->vj ? "en" : "dis"); if (r->routes) route_ShowSticky(p, r->routes, " Routes", 16); } else prompt_Printf(p, " (not authenticated)\n"); }