X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/c8c832860d06df41e7239591dcadabf8d65dc5d1..b140841c65cb0cb1551c372b6629dea5f3d79310:/radius.c diff --git a/radius.c b/radius.c index d85d47f..a9fc7e6 100644 --- a/radius.c +++ b/radius.c @@ -1,6 +1,6 @@ // L2TPNS Radius Stuff -char const *cvs_id_radius = "$Id: radius.c,v 1.19 2004-11-30 06:50:26 bodea Exp $"; +char const *cvs_id_radius = "$Id: radius.c,v 1.30 2005-05-07 08:17:26 bodea Exp $"; #include #include @@ -21,23 +21,10 @@ char const *cvs_id_radius = "$Id: radius.c,v 1.19 2004-11-30 06:50:26 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; -static const char *radius_state(int state) -{ - static char *tmp = NULL; - int i; - for (i = 0; radius_states[i]; i++) - if (i == state) return radius_states[i]; - - if (tmp == NULL) tmp = (char *)calloc(64, 1); - sprintf(tmp, "%d", state); - return tmp; -} - // Set up socket for radius requests void initrad(void) { @@ -53,17 +40,16 @@ void initrad(void) } } -void radiusclear(u16 r, sessionidt s) +void radiusclear(uint16_t r, sessionidt s) { - if (s) session[s].radius = 0; + if (s) sess_local[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) { @@ -81,9 +67,9 @@ static u16 get_free_radius() return 0; } -u16 radiusnew(sessionidt s) +uint16_t radiusnew(sessionidt s) { - u16 r = session[s].radius; + uint16_t r = sess_local[s].radius; /* re-use */ if (r) @@ -100,26 +86,28 @@ u16 radiusnew(sessionidt s) }; memset(&radius[r], 0, sizeof(radius[r])); - session[s].radius = r; + sess_local[s].radius = r; radius[r].session = s; radius[r].state = RADIUSWAIT; radius[r].retry = TIME + 1200; // Wait at least 120 seconds to re-claim this. + random_data(radius[r].auth, sizeof(radius[r].auth)); + 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); + CSTAT(radiussend); s = radius[r].session; if (!config->numradiusservers) @@ -142,6 +130,7 @@ void radiussend(u16 r, u8 state) if (radius[r].state != state) radius[r].try = 0; + radius[r].state = state; radius[r].retry = backoff(radius[r].try++); LOG(4, s, session[s].tunnel, "Send RADIUS id %d sock %d state %s try %d\n", @@ -153,11 +142,11 @@ void radiussend(u16 r, u8 state) if (s) { if (state == RADIUSAUTH) - sessionshutdown(s, "RADIUS timeout"); + sessionshutdown(s, "RADIUS timeout.", 3, 0); else { LOG(1, s, session[s].tunnel, "RADIUS timeout, but in state %s so don't timeout session\n", - radius_states[state]); + radius_state(state)); radiusclear(r, s); } STAT(radius_timeout); @@ -168,7 +157,7 @@ void radiussend(u16 r, u8 state) radius[r].state = RADIUSWAIT; radius[r].retry = 100; } - return ; + return; } // contruct RADIUS access request switch (state) @@ -178,6 +167,7 @@ void radiussend(u16 r, u8 state) break; case RADIUSSTART: case RADIUSSTOP: + case RADIUSINTERIM: b[0] = 4; // accounting request break; default: @@ -242,46 +232,59 @@ void radiussend(u16 r, u8 state) p += p[1]; } } - else if (state == RADIUSSTART || state == RADIUSSTOP) + else if (state == RADIUSSTART || state == RADIUSSTOP || state == RADIUSINTERIM) { // accounting *p = 40; // accounting type p[1] = 6; - *(u32 *) (p + 2) = htonl((state == RADIUSSTART) ? 1 : 2); + *(uint32_t *) (p + 2) = htonl(state - RADIUSSTART + 1); // start=1, stop=2, interim=3 p += p[1]; if (s) { *p = 44; // session ID p[1] = 18; - sprintf(p + 2, "%08X%08X", session[s].id, session[s].opened); + sprintf(p + 2, "%08X%08X", session[s].unique_id, session[s].opened); p += p[1]; - if (state == RADIUSSTOP) - { // stop + if (state == RADIUSSTART) + { // start + *p = 41; // delay + p[1] = 6; + *(uint32_t *) (p + 2) = htonl(time(NULL) - session[s].opened); + p += p[1]; + sess_local[s].last_interim = time_now; // Setup "first" Interim + } + else + { // stop, interim *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); + + if (session[s].snoop_ip && session[s].snoop_port) + { + *p = 26; // vendor-specific + *(uint32_t *) (p + 2) = htonl(9); // Cisco + p[6] = 1; // Cisco-Avpair + p[7] = 2 + sprintf(p + 8, "intercept=%s:%d", + fmtaddr(session[s].snoop_ip, 0), session[s].snoop_port); + + p[1] = p[7] + 6; p += p[1]; } } @@ -290,14 +293,14 @@ 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) @@ -324,11 +327,11 @@ 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 @@ -346,14 +349,12 @@ 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]; + // assume RADIUS accounting port is the authentication port +1 + addr.sin_port = htons((state == RADIUSAUTH) ? port : port+1); } LOG_HEX(5, "RADIUS Send", b, (p - b)); @@ -361,41 +362,43 @@ 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; + int r_id; - int r_code, r_id ; // Radius code. - - r_code = buf[0]; // First byte in radius packet. - r_id = buf[1]; // radius reply indentifier. - - - CSTAT(call_processrad); + CSTAT(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, "Duff RADIUS response length %d\n", len); return ; } - len = ntohs(*(u16 *) (buf + 2)); + + r_code = buf[0]; // response type + r_id = buf[1]; // radius reply indentifier. + + len = ntohs(*(uint16_t *) (buf + 2)); r = socket_index | (r_id << RADIUS_SHIFT); s = radius[r].session; - 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); + LOG(3, s, session[s].tunnel, "Received %s, radius %d response for session %u (%s, id %d)\n", + radius_state(radius[r].state), r, s, radius_code(r_code), r_id); + if (!s && radius[r].state != RADIUSSTOP) { LOG(1, s, session[s].tunnel, " Unexpected RADIUS response\n"); return; } - if (radius[r].state != RADIUSAUTH && radius[r].state != RADIUSSTART && radius[r].state != RADIUSSTOP) + if (radius[r].state != RADIUSAUTH && radius[r].state != RADIUSSTART + && radius[r].state != RADIUSSTOP && radius[r].state != RADIUSINTERIM) { LOG(1, s, session[s].tunnel, " Unexpected RADIUS response\n"); return; @@ -413,80 +416,86 @@ void processrad(u8 *buf, int len, char socket_index) 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)) + + if ((radius[r].state == RADIUSAUTH && r_code != AccessAccept && r_code != AccessReject) || + ((radius[r].state == RADIUSSTART || radius[r].state == RADIUSSTOP || radius[r].state == RADIUSINTERIM) && r_code != AccountingResponse)) { - LOG(1, s, session[s].tunnel, " Unexpected RADIUS response %d\n", *buf); + LOG(1, s, session[s].tunnel, " Unexpected RADIUS response %s\n", radius_code(r_code)); 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, s, session[s].tunnel, " Original response is \"%s\"\n", (*buf == 2) ? "accept" : "reject"); + // run post-auth plugin + struct param_post_auth packet = { + &tunnel[t], + &session[s], + session[s].user, + (r_code == AccessAccept), + radius[r].chap ? PPPCHAP : PPPPAP + }; + + run_plugins(PLUGIN_POST_AUTH, &packet); + r_code = packet.auth_allowed ? AccessAccept : AccessReject; + // 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! - { - struct param_post_auth packet = { &tunnel[t], &session[s], session[s].user, (*buf == 2), PPPCHAP }; - run_plugins(PLUGIN_POST_AUTH, &packet); - *buf = packet.auth_allowed ? 2 : 3; - } - - 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 = (r_code == AccessAccept) ? 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 + + LOG(3, s, session[s].tunnel, " CHAP User %s authentication %s.\n", session[s].user, + (r_code == AccessAccept) ? "allowed" : "denied"); } 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! - { - struct param_post_auth packet = { &tunnel[t], &session[s], session[s].user, (*buf == 2), PPPPAP }; - run_plugins(PLUGIN_POST_AUTH, &packet); - *buf = packet.auth_allowed ? 2 : 3; - } - - LOG(3, s, session[s].tunnel, " PAP User %s authentication %s.\n", session[s].user, - (*buf == 2) ? "allowed" : "denied"); // ack/nak - *p = *buf; + *p = r_code; 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 + + LOG(3, s, session[s].tunnel, " PAP User %s authentication %s.\n", session[s].user, + (r_code == AccessAccept) ? "allowed" : "denied"); } - if (*buf == 2) + if (r_code == AccessAccept) { // Login successful // Extract IP, routes, etc - u8 *p = buf + 20; - u8 *e = buf + len; + 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 if (p[1] < 6) continue; - session[s].ip = ntohl(*(u32 *) (p + 2)); + 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 if (p[1] < 6) continue; - session[s].dns1 = ntohl(*(u32 *) (p + 2)); + 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)); } @@ -494,18 +503,18 @@ void processrad(u8 *buf, int len, char socket_index) { // DNS address if (p[1] < 6) continue; - session[s].dns2 = ntohl(*(u32 *) (p + 2)); + 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 == '.') @@ -552,7 +561,7 @@ 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, s, session[s].tunnel, " Radius reply contains Filter-Id \"%.*s\"\n", l, filter); @@ -589,7 +598,7 @@ void processrad(u8 *buf, int len, char socket_index) // Vendor-Specific Attribute int vendor = ntohl(*(int *)(p + 2)); char attrib = *(p + 6); - char attrib_length = *(p + 7) - 2; + int attrib_length = *(p + 7) - 2; 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); @@ -630,12 +639,38 @@ void processrad(u8 *buf, int len, char socket_index) } while (newp); free(avpair); } + else if (*p == 99) + { + // Framed-IPv6-Route + struct in6_addr r6; + int prefixlen; + uint8_t *n = p + 2; + uint8_t *e = p + p[1]; + uint8_t *m = strchr(n, '/'); + + *m++ = 0; + inet_pton(AF_INET6, n, &r6); + + prefixlen = 0; + while (m < e && isdigit(*m)) { + prefixlen = prefixlen * 10 + *m++ - '0'; + } + + if (prefixlen) + { + LOG(3, s, session[s].tunnel, + " Radius reply contains route for %s/%d\n", + n, prefixlen); + session[s].ipv6route = r6; + session[s].ipv6prefixlen = prefixlen; + } + } } } - else if (*buf == 3) + else if (r_code == AccessReject) { - LOG(2, 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; } @@ -657,7 +692,7 @@ void processrad(u8 *buf, int len, char socket_index) else { // An ack for a stop or start record. - LOG(3, 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_state(radius[r].state)); break; } } while (0); @@ -667,36 +702,39 @@ 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; - CSTAT(call_radiusretry); + CSTAT(radiusretry); + + if (s) t = session[s].tunnel; - if (s) - t = session[s].tunnel; radius[r].retry = backoff(radius[r].try + 1); switch (radius[r].state) { - case RADIUSCHAP: // sending CHAP down PPP + case RADIUSCHAP: // sending CHAP down PPP sendchap(t, s); break; case RADIUSIPCP: - sendipcp(t, s); // send IPCP + sendipcp(t, s); // send IPCP break; - case RADIUSAUTH: // sending auth to RADIUS server + case RADIUSAUTH: // sending auth to RADIUS server radiussend(r, RADIUSAUTH); break; - case RADIUSSTART: // sending start accounting to RADIUS server + case RADIUSSTART: // sending start accounting to RADIUS server radiussend(r, RADIUSSTART); break; - case RADIUSSTOP: // sending stop accounting to RADIUS server + case RADIUSSTOP: // sending stop accounting to RADIUS server radiussend(r, RADIUSSTOP); break; + case RADIUSINTERIM: // sending interim accounting to RADIUS server + radiussend(r, RADIUSINTERIM); + break; default: - case RADIUSNULL: // Not in use - case RADIUSWAIT: // waiting timeout before available, in case delayed reply from RADIUS server + case RADIUSNULL: // Not in use + case RADIUSWAIT: // waiting timeout before available, in case delayed reply from RADIUS server // free up RADIUS task radiusclear(r, s); LOG(3, s, session[s].tunnel, "Freeing up radius session %d\n", r);