X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/f764cfffe6c453f11d6d850d002df071097cc23f..d78201b5d724fc1927b2eb803c65a5198356ea77:/radius.c diff --git a/radius.c b/radius.c index a90fe13..b276d28 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 1.6 2004-07-02 07:31:23 bodea 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; @@ -58,28 +58,26 @@ 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() { - 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; // Find the next ID to check. + if (next_radius_id >= MAXRADIUS) + next_radius_id = 1; + + if (radius[next_radius_id].state == RADIUSNULL) { - next_radius_id = (next_radius_id + 1) % MAXRADIUS; - return i; - } - if (next_radius_id == i) - { - 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) @@ -95,6 +93,9 @@ u16 radiusnew(sessionidt s) 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 +108,9 @@ 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) { @@ -352,9 +353,14 @@ 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 +368,10 @@ 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 +392,21 @@ 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"); +// radius[r].state = RADIUSWAIT; + + 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. +// old code. I think incorrect. --mo +// radius[r].state = RADIUSWAIT; +// break; // Finish the radius sesssion. } if (radius[r].state == RADIUSAUTH) { @@ -404,8 +415,10 @@ 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 +435,9 @@ 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 +468,18 @@ 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 +519,11 @@ 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 +580,10 @@ 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 +595,15 @@ 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].sid = 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 +616,9 @@ 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);