X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/2f5b811429a2690c2ce44d09cc571c3230420c1b..17fd46618e32be940b963537b35ff265775a54c0:/radius.c?ds=sidebyside diff --git a/radius.c b/radius.c index 799a472..571fded 100644 --- a/radius.c +++ b/radius.c @@ -1,6 +1,6 @@ // L2TPNS Radius Stuff -char const *cvs_id_radius = "$Id: radius.c,v 1.18 2004-11-29 02:17:18 bodea Exp $"; +char const *cvs_id_radius = "$Id: radius.c,v 1.22 2005-01-05 14:35:01 bodea Exp $"; #include #include @@ -21,23 +21,10 @@ char const *cvs_id_radius = "$Id: radius.c,v 1.18 2004-11-29 02:17:18 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; 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 = session[s].radius; /* re-use */ if (r) @@ -110,16 +96,16 @@ u16 radiusnew(sessionidt s) } // 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 +128,7 @@ 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", @@ -157,7 +144,7 @@ void radiussend(u16 r, u8 state) 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 +155,7 @@ void radiussend(u16 r, u8 state) radius[r].state = RADIUSWAIT; radius[r].retry = 100; } - return ; + return; } // contruct RADIUS access request switch (state) @@ -246,7 +233,7 @@ 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) { @@ -258,30 +245,30 @@ 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]; } } @@ -290,14 +277,14 @@ 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 +311,11 @@ 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 +333,12 @@ 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)); @@ -361,35 +346,36 @@ 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; - - int r_code, r_id ; // Radius code. - - r_code = buf[0]; // First byte in radius packet. - r_id = buf[1]; // radius reply indentifier. + uint8_t routes = 0; + int r_code; + int r_id; - - 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"); @@ -413,70 +399,74 @@ 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) && 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; - 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 - 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)); @@ -484,25 +474,27 @@ void processrad(u8 *buf, int len, char socket_index) else if (*p == 135) { // DNS address - 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 - 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 == '.') @@ -549,7 +541,7 @@ 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); @@ -581,52 +573,55 @@ void processrad(u8 *buf, int len, char socket_index) 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; + 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 (attrib_length == 0) continue; - if (attrib != 1) - LOG(3, s, session[s].tunnel, " Unknown vendor-specific\n"); - else + 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, 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) + 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! @@ -651,7 +646,7 @@ 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); @@ -661,15 +656,15 @@ 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) {