X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/4b25f13aeff7deba39500a94b0ec60e6f83deeca..9c31b3835214db6ef39402c0211841547e2088bc:/radius.c?ds=inline diff --git a/radius.c b/radius.c index fb295fb..1bbb65a 100644 --- a/radius.c +++ b/radius.c @@ -1,6 +1,6 @@ // L2TPNS Radius Stuff -char const *cvs_id_radius = "$Id: radius.c,v 1.16 2004/11/27 21:10:51 bodea Exp $"; +char const *cvs_id_radius = "$Id: radius.c,v 1.20.2.1 2005/02/14 05:56:38 bodea Exp $"; #include #include @@ -21,7 +21,6 @@ char const *cvs_id_radius = "$Id: radius.c,v 1.16 2004/11/27 21:10:51 bodea Exp extern radiust *radius; extern sessiont *session; extern tunnelt *tunnel; -extern u32 sessionid; extern configt *config; extern int *radfds; extern ip_filtert *ip_filters; @@ -42,7 +41,7 @@ static const char *radius_state(int state) void initrad(void) { int i; - LOG(3, 0, 0, 0, "Creating %d sockets for RADIUS queries\n", config->num_radfds); + LOG(3, 0, 0, "Creating %d sockets for RADIUS queries\n", config->num_radfds); radfds = calloc(sizeof(int), config->num_radfds); for (i = 0; i < config->num_radfds; i++) { @@ -53,17 +52,17 @@ void initrad(void) } } -void radiusclear(u16 r, sessionidt s) +void radiusclear(uint16_t r, sessionidt s) { if (s) session[s].radius = 0; memset(&radius[r], 0, sizeof(radius[r])); // radius[r].state = RADIUSNULL; } -static u16 get_free_radius() +static uint16_t get_free_radius() { int count; - static u32 next_radius_id = 0; + static uint32_t next_radius_id = 0; for (count = MAXRADIUS; count > 0 ; --count) { @@ -77,24 +76,24 @@ static u16 get_free_radius() } } - LOG(0, 0, 0, 0, "Can't find a free radius session! This is very bad!\n"); + LOG(0, 0, 0, "Can't find a free radius session! This is very bad!\n"); return 0; } -u16 radiusnew(sessionidt s) +uint16_t radiusnew(sessionidt s) { - u16 r = session[s].radius; + uint16_t r = session[s].radius; /* re-use */ if (r) { - LOG(3, 0, s, session[s].tunnel, "Re-used radius %d\n", r); + LOG(3, s, session[s].tunnel, "Re-used radius %d\n", r); return r; } if (!(r = get_free_radius())) { - LOG(1, 0, s, session[s].tunnel, "No free RADIUS sessions\n"); + LOG(1, s, session[s].tunnel, "No free RADIUS sessions\n"); STAT(radius_overflow); return 0; }; @@ -105,18 +104,18 @@ u16 radiusnew(sessionidt s) radius[r].state = RADIUSWAIT; radius[r].retry = TIME + 1200; // Wait at least 120 seconds to re-claim this. - LOG(3,0,s, session[s].tunnel, "Allocated radius %d\n", r); + LOG(3, s, session[s].tunnel, "Allocated radius %d\n", r); return r; } // Send a RADIUS request -void radiussend(u16 r, u8 state) +void radiussend(uint16_t r, uint8_t state) { struct sockaddr_in addr; - u8 b[4096]; // RADIUS packet + uint8_t b[4096]; // RADIUS packet char pass[129]; int pl; - u8 *p; + uint8_t *p; sessionidt s; CSTAT(call_radiussend); @@ -124,12 +123,12 @@ void radiussend(u16 r, u8 state) s = radius[r].session; if (!config->numradiusservers) { - LOG(0, 0, s, session[s].tunnel, "No RADIUS servers\n"); + LOG(0, s, session[s].tunnel, "No RADIUS servers\n"); return; } if (!*config->radiussecret) { - LOG(0, 0, s, session[s].tunnel, "No RADIUS secret\n"); + LOG(0, s, session[s].tunnel, "No RADIUS secret\n"); return; } @@ -144,9 +143,10 @@ void radiussend(u16 r, u8 state) radius[r].try = 0; radius[r].state = state; radius[r].retry = backoff(radius[r].try++); - LOG(4, 0, s, session[s].tunnel, "Send RADIUS id %d sock %d state %s try %d\n", - r >> RADIUS_SHIFT, r & RADIUS_MASK, - radius_state(radius[r].state), radius[r].try); + LOG(4, s, session[s].tunnel, "Send RADIUS id %d sock %d state %s try %d\n", + r >> RADIUS_SHIFT, r & RADIUS_MASK, + radius_state(radius[r].state), radius[r].try); + if (radius[r].try > config->numradiusservers * 2) { if (s) @@ -155,7 +155,7 @@ void radiussend(u16 r, u8 state) sessionshutdown(s, "RADIUS timeout"); else { - LOG(1, 0, s, session[s].tunnel, "RADIUS timeout, but in state %s so don't timeout session\n", + LOG(1, s, session[s].tunnel, "RADIUS timeout, but in state %s so don't timeout session\n", radius_states[state]); radiusclear(r, s); } @@ -180,7 +180,7 @@ void radiussend(u16 r, u8 state) b[0] = 4; // accounting request break; default: - LOG(0, 0, 0, 0, "Unknown radius state %d\n", state); + LOG(0, 0, 0, "Unknown radius state %d\n", state); } b[1] = r >> RADIUS_SHIFT; // identifier memcpy(b + 4, radius[r].auth, 16); @@ -245,7 +245,7 @@ void radiussend(u16 r, u8 state) { // accounting *p = 40; // accounting type p[1] = 6; - *(u32 *) (p + 2) = htonl((state == RADIUSSTART) ? 1 : 2); + *(uint32_t *) (p + 2) = htonl((state == RADIUSSTART) ? 1 : 2); p += p[1]; if (s) { @@ -257,30 +257,30 @@ void radiussend(u16 r, u8 state) { // stop *p = 42; // input octets p[1] = 6; - *(u32 *) (p + 2) = htonl(session[s].cin); + *(uint32_t *) (p + 2) = htonl(session[s].cin); p += p[1]; *p = 43; // output octets p[1] = 6; - *(u32 *) (p + 2) = htonl(session[s].cout); + *(uint32_t *) (p + 2) = htonl(session[s].cout); p += p[1]; *p = 46; // session time p[1] = 6; - *(u32 *) (p + 2) = htonl(time(NULL) - session[s].opened); + *(uint32_t *) (p + 2) = htonl(time(NULL) - session[s].opened); p += p[1]; *p = 47; // input packets p[1] = 6; - *(u32 *) (p + 2) = htonl(session[s].pin); + *(uint32_t *) (p + 2) = htonl(session[s].pin); p += p[1]; *p = 48; // output spackets p[1] = 6; - *(u32 *) (p + 2) = htonl(session[s].pout); + *(uint32_t *) (p + 2) = htonl(session[s].pout); p += p[1]; } else { // start *p = 41; // delay p[1] = 6; - *(u32 *) (p + 2) = htonl(time(NULL) - session[s].opened); + *(uint32_t *) (p + 2) = htonl(time(NULL) - session[s].opened); p += p[1]; } } @@ -289,14 +289,14 @@ void radiussend(u16 r, u8 state) { *p = 5; // NAS-Port p[1] = 6; - *(u32 *) (p + 2) = htonl(s); + *(uint32_t *) (p + 2) = htonl(s); p += p[1]; } if (s && session[s].ip) { *p = 8; // Framed-IP-Address p[1] = 6; - *(u32 *) (p + 2) = htonl(session[s].ip); + *(uint32_t *) (p + 2) = htonl(session[s].ip); p += p[1]; } if (*session[s].called) @@ -323,11 +323,11 @@ void radiussend(u16 r, u8 state) // NAS-IP-Address *p = 4; p[1] = 6; - *(u32 *)(p + 2) = config->bind_address; + *(uint32_t *)(p + 2) = config->bind_address; p += p[1]; // All AVpairs added - *(u16 *) (b + 2) = htons(p - b); + *(uint16_t *) (b + 2) = htons(p - b); if (state != RADIUSAUTH) { // Build auth for accounting packet @@ -345,14 +345,14 @@ void radiussend(u16 r, u8 state) } memset(&addr, 0, sizeof(addr)); addr.sin_family = AF_INET; - *(u32 *) & addr.sin_addr = config->radiusserver[(radius[r].try - 1) % config->numradiusservers]; + *(uint32_t *) & addr.sin_addr = config->radiusserver[(radius[r].try - 1) % config->numradiusservers]; { - // get radius port - u16 port = config->radiusport[(radius[r].try - 1) % config->numradiusservers]; - // no need to define the accounting port for itself: - // the accounting port is as far as I know always one more - // than the auth port JK 20040713 - addr.sin_port = htons((state == RADIUSAUTH) ? port : port+1); + // get radius port + uint16_t port = config->radiusport[(radius[r].try - 1) % config->numradiusservers]; + // no need to define the accounting port for itself: + // the accounting port is as far as I know always one more + // than the auth port JK 20040713 + addr.sin_port = htons((state == RADIUSAUTH) ? port : port+1); } LOG_HEX(5, "RADIUS Send", b, (p - b)); @@ -360,15 +360,15 @@ void radiussend(u16 r, u8 state) } // process RADIUS response -void processrad(u8 *buf, int len, char socket_index) +void processrad(uint8_t *buf, int len, char socket_index) { - u8 b[MAXCONTROL]; + uint8_t b[MAXCONTROL]; MD5_CTX ctx; - u16 r; + uint16_t r; sessionidt s; tunnelidt t = 0; hasht hash; - u8 routes = 0; + uint8_t routes = 0; int r_code, r_id ; // Radius code. @@ -379,24 +379,24 @@ void processrad(u8 *buf, int len, char socket_index) CSTAT(call_processrad); LOG_HEX(5, "RADIUS Response", buf, len); - if (len < 20 || len < ntohs(*(u16 *) (buf + 2))) + if (len < 20 || len < ntohs(*(uint16_t *) (buf + 2))) { - LOG(1, 0, 0, 0, "Duff RADIUS response length %d\n", len); + LOG(1, 0, 0, "Duff RADIUS response length %d\n", len); return ; } - len = ntohs(*(u16 *) (buf + 2)); + len = ntohs(*(uint16_t *) (buf + 2)); r = socket_index | (r_id << RADIUS_SHIFT); s = radius[r].session; - LOG(3, 0, s, session[s].tunnel, "Received %s, radius %d response for session %u (code %d, id %d)\n", + LOG(3, s, session[s].tunnel, "Received %s, radius %d response for session %u (code %d, id %d)\n", radius_states[radius[r].state], r, s, r_code, r_id); if (!s && radius[r].state != RADIUSSTOP) { - LOG(1, 0, s, session[s].tunnel, " Unexpected RADIUS response\n"); + LOG(1, s, session[s].tunnel, " Unexpected RADIUS response\n"); return; } if (radius[r].state != RADIUSAUTH && radius[r].state != RADIUSSTART && radius[r].state != RADIUSSTOP) { - LOG(1, 0, s, session[s].tunnel, " Unexpected RADIUS response\n"); + LOG(1, s, session[s].tunnel, " Unexpected RADIUS response\n"); return; } t = session[s].tunnel; @@ -409,24 +409,24 @@ void processrad(u8 *buf, int len, char socket_index) do { if (memcmp(hash, buf + 4, 16)) { - LOG(0, 0, s, session[s].tunnel, " Incorrect auth on RADIUS response!! (wrong secret in radius config?)\n"); + LOG(0, s, session[s].tunnel, " Incorrect auth on RADIUS response!! (wrong secret in radius config?)\n"); return; // Do nothing. On timeout, it will try the next radius server. } if ((radius[r].state == RADIUSAUTH && *buf != 2 && *buf != 3) || ((radius[r].state == RADIUSSTART || radius[r].state == RADIUSSTOP) && *buf != 5)) { - LOG(1, 0, s, session[s].tunnel, " Unexpected RADIUS response %d\n", *buf); + LOG(1, s, session[s].tunnel, " Unexpected RADIUS response %d\n", *buf); return; // We got something we didn't expect. Let the timeouts take // care off finishing the radius session if that's really correct. } if (radius[r].state == RADIUSAUTH) { - LOG(4, 0, s, session[s].tunnel, " Original response is \"%s\"\n", (*buf == 2) ? "accept" : "reject"); + LOG(4, s, session[s].tunnel, " Original response is \"%s\"\n", (*buf == 2) ? "accept" : "reject"); // process auth response if (radius[r].chap) { // CHAP - u8 *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPCHAP); + uint8_t *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPCHAP); if (!p) return; // Abort! { @@ -435,17 +435,17 @@ void processrad(u8 *buf, int len, char socket_index) *buf = packet.auth_allowed ? 2 : 3; } - LOG(3, 0, s, session[s].tunnel, " CHAP User %s authentication %s.\n", session[s].user, + LOG(3, s, session[s].tunnel, " CHAP User %s authentication %s.\n", session[s].user, (*buf == 2) ? "allowed" : "denied"); *p = (*buf == 2) ? 3 : 4; // ack/nak p[1] = radius[r].id; - *(u16 *) (p + 2) = ntohs(4); // no message + *(uint16_t *) (p + 2) = ntohs(4); // no message tunnelsend(b, (p - b) + 4, t); // send it } else { // PAP - u8 *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPPAP); + uint8_t *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPPAP); if (!p) return; // Abort! { @@ -454,12 +454,12 @@ void processrad(u8 *buf, int len, char socket_index) *buf = packet.auth_allowed ? 2 : 3; } - LOG(3, 0, s, session[s].tunnel, " PAP User %s authentication %s.\n", session[s].user, + LOG(3, s, session[s].tunnel, " PAP User %s authentication %s.\n", session[s].user, (*buf == 2) ? "allowed" : "denied"); // ack/nak *p = *buf; p[1] = radius[r].id; - *(u16 *) (p + 2) = ntohs(5); + *(uint16_t *) (p + 2) = ntohs(5); p[4] = 0; // no message tunnelsend(b, (p - b) + 5, t); // send it } @@ -468,37 +468,46 @@ void processrad(u8 *buf, int len, char socket_index) { // Login successful // Extract IP, routes, etc - u8 *p = buf + 20; - u8 *e = buf + len; - for (p = buf + 20; p < e && p[1]; p += p[1]) + uint8_t *p = buf + 20; + uint8_t *e = buf + len; + for (; p + 2 <= e && p[1] && p + p[1] <= e; p += p[1]) { if (*p == 8) { // Framed-IP-Address - LOG(3, 0, s, session[s].tunnel, " Radius reply contains IP address %s\n", inet_toa(*(u32 *) (p + 2))); - session[s].ip = ntohl(*(u32 *) (p + 2)); + if (p[1] < 6) continue; + session[s].ip = ntohl(*(uint32_t *) (p + 2)); session[s].ip_pool_index = -1; + LOG(3, s, session[s].tunnel, " Radius reply contains IP address %s\n", + fmtaddr(htonl(session[s].ip), 0)); + + if (session[s].ip == 0xFFFFFFFE) + session[s].ip = 0; // assign from pool } else if (*p == 135) { // DNS address - LOG(3, 0, s, session[s].tunnel, " Radius reply contains primary DNS address %s\n", inet_toa(*(u32 *) (p + 2))); - session[s].dns1 = ntohl(*(u32 *) (p + 2)); + if (p[1] < 6) continue; + session[s].dns1 = ntohl(*(uint32_t *) (p + 2)); + LOG(3, s, session[s].tunnel, " Radius reply contains primary DNS address %s\n", + fmtaddr(htonl(session[s].dns1), 0)); } else if (*p == 136) { // DNS address - LOG(3, 0, s, session[s].tunnel, " Radius reply contains secondary DNS address %s\n", inet_toa(*(u32 *) (p + 2))); - session[s].dns2 = ntohl(*(u32 *) (p + 2)); + if (p[1] < 6) continue; + session[s].dns2 = ntohl(*(uint32_t *) (p + 2)); + LOG(3, s, session[s].tunnel, " Radius reply contains secondary DNS address %s\n", + fmtaddr(htonl(session[s].dns2), 0)); } else if (*p == 22) { // Framed-Route - ipt ip = 0, mask = 0; - u8 u = 0; - u8 bits = 0; - u8 *n = p + 2; - u8 *e = p + p[1]; + in_addr_t ip = 0, mask = 0; + uint8_t u = 0; + uint8_t bits = 0; + uint8_t *n = p + 2; + uint8_t *e = p + p[1]; while (n < e && (isdigit(*n) || *n == '.')) { if (*n == '.') @@ -524,18 +533,16 @@ void processrad(u8 *buf, int len, char socket_index) mask = 0xFFFF0000; else mask = 0xFFFFFF00; + if (routes == MAXROUTE) { - LOG(1, 0, s, session[s].tunnel, " Too many routes\n"); + LOG(1, s, session[s].tunnel, " Too many routes\n"); } else if (ip) { - char *ips, *masks; - ips = strdup(inet_toa(htonl(ip))); - masks = strdup(inet_toa(htonl(mask))); - LOG(3, 0, s, session[s].tunnel, " Radius reply contains route for %s/%s\n", ips, masks); - free(ips); - free(masks); + LOG(3, s, session[s].tunnel, " Radius reply contains route for %s/%s\n", + fmtaddr(htonl(ip), 0), fmtaddr(htonl(mask), 1)); + session[s].route[routes].ip = ip; session[s].route[routes].mask = mask; routes++; @@ -547,10 +554,10 @@ void processrad(u8 *buf, int len, char socket_index) char *filter = p + 2; int l = p[1] - 2; char *suffix; - u8 *f = 0; + uint8_t *f = 0; int i; - LOG(3, 0, s, session[s].tunnel, " Radius reply contains Filter-Id \"%.*s\"\n", l, filter); + LOG(3, s, session[s].tunnel, " Radius reply contains Filter-Id \"%.*s\"\n", l, filter); if ((suffix = memchr(filter, '.', l))) { int b = suffix - filter; @@ -564,7 +571,7 @@ void processrad(u8 *buf, int len, char socket_index) if (!f) { - LOG(3, 0, s, session[s].tunnel, " Invalid filter\n"); + LOG(3, s, session[s].tunnel, " Invalid filter\n"); continue; } @@ -573,71 +580,76 @@ void processrad(u8 *buf, int len, char socket_index) !strncmp(ip_filters[i].name, filter, l)) *f = i + 1; - if (!*f) - LOG(3, 0, s, session[s].tunnel, " Unknown filter\n"); + if (*f) + ip_filters[*f - 1].used++; + else + LOG(3, s, session[s].tunnel, " Unknown filter\n"); } - else if (*p == 26) + else if (*p == 26 && p[1] >= 7) { // Vendor-Specific Attribute int vendor = ntohl(*(int *)(p + 2)); char attrib = *(p + 6); char attrib_length = *(p + 7) - 2; - LOG(3, 0, s, session[s].tunnel, " Radius reply contains Vendor-Specific. Vendor=%d Attrib=%d Length=%d\n", vendor, attrib, attrib_length); - if (attrib_length == 0) continue; - if (attrib != 1) - LOG(3, 0, s, session[s].tunnel, " Unknown vendor-specific\n"); - else + char *avpair, *value, *key, *newp; + + LOG(3, s, session[s].tunnel, " Radius reply contains Vendor-Specific. Vendor=%d Attrib=%d Length=%d\n", vendor, attrib, attrib_length); + if (vendor != 9 || attrib != 1) { - char *avpair, *value, *key, *newp; - avpair = key = calloc(attrib_length + 1, 1); - memcpy(avpair, p + 8, attrib_length); - LOG(3, 0, s, session[s].tunnel, " Cisco-Avpair value: %s\n", avpair); - do { - value = strchr(key, '='); - if (!value) break; - *value++ = 0; - - // Trim quotes off reply string - if (*value == '\'' || *value == '\"') - { - char *x; - value++; - x = value + strlen(value) - 1; - if (*x == '\'' || *x == '\"') - *x = 0; - } - - // Run hooks - newp = strchr(value, ','); - if (newp) *newp++ = 0; - { - struct param_radius_response p = { &tunnel[session[s].tunnel], &session[s], key, value }; - run_plugins(PLUGIN_RADIUS_RESPONSE, &p); - } - key = newp; - } while (newp); - free(avpair); + LOG(3, s, session[s].tunnel, " Unknown vendor-specific\n"); + continue; } + + if (attrib_length < 0) continue; + + avpair = key = calloc(attrib_length + 1, 1); + memcpy(avpair, p + 8, attrib_length); + LOG(3, s, session[s].tunnel, " Cisco-Avpair value: %s\n", avpair); + do { + value = strchr(key, '='); + if (!value) break; + *value++ = 0; + + // Trim quotes off reply string + if (*value == '\'' || *value == '\"') + { + char *x; + value++; + x = value + strlen(value) - 1; + if (*x == '\'' || *x == '\"') + *x = 0; + } + + // Run hooks + newp = strchr(value, ','); + if (newp) *newp++ = 0; + { + struct param_radius_response p = { &tunnel[session[s].tunnel], &session[s], key, value }; + run_plugins(PLUGIN_RADIUS_RESPONSE, &p); + } + key = newp; + } while (newp); + free(avpair); } } } else if (*buf == 3) { - LOG(2, 0, s, session[s].tunnel, " Authentication denied for %s\n", session[s].user); -//FIXME: We should tear down the session here! + LOG(2, s, session[s].tunnel, " Authentication rejected for %s\n", session[s].user); + sessionkill(s, "Authentication rejected"); break; } if (!session[s].dns1 && config->default_dns1) { session[s].dns1 = htonl(config->default_dns1); - LOG(3, 0, s, t, " Sending dns1 = %s\n", inet_toa(config->default_dns1)); + LOG(3, s, t, " Sending dns1 = %s\n", fmtaddr(config->default_dns1, 0)); } if (!session[s].dns2 && config->default_dns2) { session[s].dns2 = htonl(config->default_dns2); - LOG(3, 0, s, t, " Sending dns2 = %s\n", inet_toa(config->default_dns2)); + LOG(3, s, t, " Sending dns2 = %s\n", fmtaddr(config->default_dns2, 0)); } // Valid Session, set it up @@ -647,7 +659,7 @@ void processrad(u8 *buf, int len, char socket_index) else { // An ack for a stop or start record. - LOG(3, 0, s, t, " RADIUS accounting ack recv in state %s\n", radius_states[radius[r].state]); + LOG(3, s, t, " RADIUS accounting ack recv in state %s\n", radius_states[radius[r].state]); break; } } while (0); @@ -657,7 +669,7 @@ void processrad(u8 *buf, int len, char socket_index) } // Send a retry for RADIUS/CHAP message -void radiusretry(u16 r) +void radiusretry(uint16_t r) { sessionidt s = radius[r].session; tunnelidt t = 0; @@ -666,6 +678,7 @@ void radiusretry(u16 r) if (s) t = session[s].tunnel; + radius[r].retry = backoff(radius[r].try + 1); switch (radius[r].state) { @@ -689,7 +702,7 @@ void radiusretry(u16 r) case RADIUSWAIT: // waiting timeout before available, in case delayed reply from RADIUS server // free up RADIUS task radiusclear(r, s); - LOG(3, 0, s, session[s].tunnel, "Freeing up radius session %d\n", r); + LOG(3, s, session[s].tunnel, "Freeing up radius session %d\n", r); break; } }