X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/d305da84f491fadbef1758f8cc79c808167f625f..98a119381711acc02b2ba28f0436583aff41ad69:/radius.c diff --git a/radius.c b/radius.c index 18bdf1e..5634775 100644 --- a/radius.c +++ b/radius.c @@ -1,5 +1,6 @@ // L2TPNS Radius Stuff -// $Id: radius.c,v 1.3 2004/05/24 04:27:11 fred_nerk Exp $ + +char const *cvs_id_radius = "$Id: radius.c,v 1.10 2004/09/02 04:18:07 fred_nerk Exp $"; #include #include @@ -21,7 +22,6 @@ extern radiust *radius; extern sessiont *session; extern tunnelt *tunnel; extern u32 sessionid; -extern struct Tstats *_statistics; extern struct configt *config; extern int *radfds; @@ -46,7 +46,7 @@ void initrad(void) for (i = 0; i < config->num_radfds; i++) { int flags; - if (!radfds[i]) radfds[i] = socket(AF_INET, SOCK_DGRAM, UDP); + if (!radfds[i]) radfds[i] = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); flags = fcntl(radfds[i], F_GETFL, 0); fcntl(radfds[i], F_SETFL, flags | O_NONBLOCK); } @@ -58,43 +58,53 @@ void radiusclear(u16 r, sessionidt s) memset(&radius[r], 0, sizeof(radius[r])); // radius[r].state = RADIUSNULL; } -int next_radius_id = 1; -static u16 new_radius() +static u16 get_free_radius() { - u16 i; - int loops = 0; - for (i = next_radius_id; ; i = (i + 1) % MAXRADIUS) + int count; + static u32 next_radius_id = 0; + + for (count = MAXRADIUS; count > 0 ; --count) { - if (radius[i].state == RADIUSNULL) - { - next_radius_id = (next_radius_id + 1) % MAXRADIUS; - return i; - } - if (next_radius_id == i) + ++next_radius_id; // Find the next ID to check. + if (next_radius_id >= MAXRADIUS) + next_radius_id = 1; + + if (radius[next_radius_id].state == RADIUSNULL) { - if (++loops == 2) - { - log(0, 0, 0, 0, "Can't find a free radius session! This is very bad!\n"); - return 0; - } + return next_radius_id; } } + + log(0, 0, 0, 0, "Can't find a free radius session! This is very bad!\n"); + return 0; } u16 radiusnew(sessionidt s) { - u16 r; - if (!(r = new_radius())) + u16 r = session[s].radius; + + /* re-use */ + if (r) + { + log(3, 0, 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"); STAT(radius_overflow); return 0; }; + memset(&radius[r], 0, sizeof(radius[r])); session[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. + + log(3,0,s, session[s].tunnel, "Allocated radius %d\n", r); return r; } @@ -107,9 +117,9 @@ void radiussend(u16 r, u8 state) int pl; u8 *p; sessionidt s; -#ifdef STAT_CALLS - STAT(call_radiussend); -#endif + + CSTAT(call_radiussend); + s = radius[r].session; if (!config->numradiusservers) { @@ -335,7 +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]; - addr.sin_port = htons((state == RADIUSAUTH) ? RADPORT : RADAPORT); + { + // 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); + } log_hex(5, "RADIUS Send", b, (p - b)); sendto(radfds[r & RADIUS_MASK], b, p - b, 0, (void *) &addr, sizeof(addr)); @@ -352,9 +369,14 @@ void processrad(u8 *buf, int len, char socket_index) hasht hash; u8 routes = 0; -#ifdef STAT_CALLS - STAT(call_processrad); -#endif + 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); + log_hex(5, "RADIUS Response", buf, len); if (len < 20 || len < ntohs(*(u16 *) (buf + 2))) { @@ -362,10 +384,10 @@ void processrad(u8 *buf, int len, char socket_index) return ; } len = ntohs(*(u16 *) (buf + 2)); - r = socket_index | (buf[1] << RADIUS_SHIFT); + 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\n", - radius_states[radius[r].state], r, s); + log(3, 0, 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"); @@ -386,16 +408,15 @@ 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\n"); - radius[r].state = RADIUSWAIT; - break; + log(0, 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); - radius[r].state = RADIUSWAIT; - break; + 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) { @@ -404,8 +425,10 @@ void processrad(u8 *buf, int len, char socket_index) if (radius[r].chap) { // CHAP - u8 *p = makeppp(b, 0, 0, t, s, PPPCHAP); - + u8 *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); @@ -422,7 +445,9 @@ void processrad(u8 *buf, int len, char socket_index) else { // PAP - u8 *p = makeppp(b, 0, 0, t, s, PPPPAP); + u8 *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 }; @@ -453,17 +478,18 @@ void processrad(u8 *buf, int len, char socket_index) // Statically assigned 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)); + session[s].ip_pool_index = -1; } else if (*p == 135) { // DNS address - log(3, 0, s, session[s].tunnel, " Radius reply contains primary DNS address %s\n", inet_toa(ntohl(*(u32 *) (p + 2)))); + 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)); } else if (*p == 136) { // DNS address - log(3, 0, s, session[s].tunnel, " Radius reply contains secondary DNS address %s\n", inet_toa(ntohl(*(u32 *) (p + 2)))); + 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)); } else if (*p == 22) @@ -503,11 +529,11 @@ void processrad(u8 *buf, int len, char socket_index) { log(1, 0, s, session[s].tunnel, " Too many routes\n"); } - else + else if (ip) { char *ips, *masks; - ips = strdup(inet_toa(ip)); - masks = strdup(inet_toa(mask)); + 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); @@ -564,19 +590,10 @@ void processrad(u8 *buf, int len, char socket_index) 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! break; } - // Check for Assign-IP-Address - if (!session[s].ip || session[s].ip == 0xFFFFFFFE) - { - assign_ip_address(s); - if (session[s].ip) - log(3, 0, s, t, " No IP allocated by radius. Assigned %s from pool\n", - inet_toa(htonl(session[s].ip))); - else - log(0, 0, s, t, " No IP allocated by radius. The IP address pool is FULL!\n"); - } if (!session[s].dns1 && config->default_dns1) { session[s].dns1 = htonl(config->default_dns1); @@ -588,21 +605,15 @@ void processrad(u8 *buf, int len, char socket_index) log(3, 0, s, t, " Sending dns2 = %s\n", inet_toa(config->default_dns2)); } - if (session[s].ip) - { - // Valid Session, set it up - session[s].sid = 0; - sessionsetup(t, s, routes); - } - else - { - log(0, 0, s, t, " End of processrad(), but no valid session exists.\n"); - sessionkill(s, "Can't create valid session"); - } + // Valid Session, set it up + session[s].unique_id = 0; + sessionsetup(t, s); } else { - log(3, 0, s, t, " RADIUS response in state %s\n", radius_states[radius[r].state]); + // 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]); + break; } } while (0); @@ -615,9 +626,9 @@ void radiusretry(u16 r) { sessionidt s = radius[r].session; tunnelidt t = 0; -#ifdef STAT_CALLS - STAT(call_radiusretry); -#endif + + CSTAT(call_radiusretry); + if (s) t = session[s].tunnel; radius[r].retry = backoff(radius[r].try + 1); @@ -660,6 +671,6 @@ void radius_clean() || !session[radius[i].session].opened || session[radius[i].session].die || session[radius[i].session].tunnel == 0) - radiusclear(i, 0); + radiusclear(i, radius[i].session); } }