X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/bc5b25832a728dea4346782d84d63128035bcfaf..9c31b3835214db6ef39402c0211841547e2088bc:/radius.c diff --git a/radius.c b/radius.c index 39af2df..1bbb65a 100644 --- a/radius.c +++ b/radius.c @@ -1,6 +1,6 @@ // L2TPNS Radius Stuff -char const *cvs_id_radius = "$Id: radius.c,v 1.18 2004/11/29 02:17:18 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 1.18 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; @@ -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) { @@ -81,9 +80,9 @@ 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) @@ -110,13 +109,13 @@ 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); @@ -246,7 +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) { @@ -258,30 +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]; } } @@ -290,14 +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) @@ -324,11 +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 @@ -346,14 +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)); @@ -361,15 +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. @@ -380,12 +379,12 @@ 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, "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, s, session[s].tunnel, "Received %s, radius %d response for session %u (code %d, id %d)\n", @@ -427,7 +426,7 @@ void processrad(u8 *buf, int len, char socket_index) 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! { @@ -440,13 +439,13 @@ void processrad(u8 *buf, int len, char socket_index) (*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! { @@ -460,7 +459,7 @@ void processrad(u8 *buf, int len, char socket_index) // 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 } @@ -469,40 +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 - 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 - 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 +554,7 @@ 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); @@ -581,55 +586,58 @@ 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) { - 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; } @@ -661,7 +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; @@ -670,6 +678,7 @@ void radiusretry(u16 r) if (s) t = session[s].tunnel; + radius[r].retry = backoff(radius[r].try + 1); switch (radius[r].state) {