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release 2.0.20
[l2tpns.git] / radius.c
diff --git a/radius.c b/radius.c
index f20821c..38b1f22 100644 (file)
--- a/radius.c
+++ b/radius.c
@@ -1,6 +1,6 @@
 // L2TPNS Radius Stuff
 
-char const *cvs_id_radius = "$Id: radius.c,v 1.21 2005/01/05 13:45:49 bodea Exp $";
+char const *cvs_id_radius = "$Id: radius.c,v 1.20.2.2 2005/05/03 05:10:52 bodea Exp $";
 
 #include <time.h>
 #include <stdio.h>
@@ -25,6 +25,18 @@ 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)
 {
@@ -46,6 +58,7 @@ void radiusclear(uint16_t r, sessionidt s)
        memset(&radius[r], 0, sizeof(radius[r])); // radius[r].state = RADIUSNULL;
 }
 
+
 static uint16_t get_free_radius()
 {
        int count;
@@ -105,7 +118,7 @@ void radiussend(uint16_t r, uint8_t state)
        uint8_t *p;
        sessionidt s;
 
-       CSTAT(radiussend);
+       CSTAT(call_radiussend);
 
        s = radius[r].session;
        if (!config->numradiusservers)
@@ -128,7 +141,6 @@ void radiussend(uint16_t r, uint8_t 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",
@@ -144,7 +156,7 @@ void radiussend(uint16_t r, uint8_t state)
                        else
                        {
                                LOG(1, s, session[s].tunnel, "RADIUS timeout, but in state %s so don't timeout session\n",
-                                       radius_state(state));
+                                       radius_states[state]);
                                radiusclear(r, s);
                        }
                        STAT(radius_timeout);
@@ -155,7 +167,7 @@ void radiussend(uint16_t r, uint8_t state)
                        radius[r].state = RADIUSWAIT;
                        radius[r].retry = 100;
                }
-               return;
+               return ;
        }
        // contruct RADIUS access request
        switch (state)
@@ -271,6 +283,18 @@ void radiussend(uint16_t r, uint8_t state)
                                *(uint32_t *) (p + 2) = htonl(time(NULL) - session[s].opened);
                                p += p[1];
                        }
+
+                       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];
+                       }
                }
        }
        if (s)
@@ -357,10 +381,14 @@ void processrad(uint8_t *buf, int len, char socket_index)
        tunnelidt t = 0;
        hasht hash;
        uint8_t routes = 0;
-       int r_code;
-       int r_id;
 
-       CSTAT(processrad);
+       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(*(uint16_t *) (buf + 2)))
@@ -368,16 +396,11 @@ void processrad(uint8_t *buf, int len, char socket_index)
                LOG(1, 0, 0, "Duff RADIUS response length %d\n", len);
                return ;
        }
-
-       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 (%s, id %d)\n",
-                       radius_state(radius[r].state), r, s, radius_code(r_code), r_id);
-
+       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);
        if (!s && radius[r].state != RADIUSSTOP)
        {
                LOG(1, s, session[s].tunnel, "   Unexpected RADIUS response\n");
@@ -401,29 +424,16 @@ void processrad(uint8_t *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 && r_code != AccessAccept && r_code != AccessReject) ||
-                       ((radius[r].state == RADIUSSTART || radius[r].state == RADIUSSTOP) && r_code != AccountingResponse))
+               if ((radius[r].state == RADIUSAUTH && *buf != 2 && *buf != 3) ||
+                       ((radius[r].state == RADIUSSTART || radius[r].state == RADIUSSTOP) && *buf != 5))
                {
-                       LOG(1, s, session[s].tunnel, "   Unexpected RADIUS response %s\n", radius_code(r_code));
+                       LOG(1, s, session[s].tunnel, "   Unexpected RADIUS response %d\n", *buf);
                        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)
                {
-                       // 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;
-
+                       LOG(4, s, session[s].tunnel, "   Original response is \"%s\"\n", (*buf == 2) ? "accept" : "reject");
                        // process auth response
                        if (radius[r].chap)
                        {
@@ -431,13 +441,18 @@ void processrad(uint8_t *buf, int len, char socket_index)
                                uint8_t *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPCHAP);
                                if (!p) return; // Abort!
 
-                               *p = (r_code == AccessAccept) ? 3 : 4;     // ack/nak
+                               {
+                                       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[1] = radius[r].id;
                                *(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
                        {
@@ -445,18 +460,23 @@ void processrad(uint8_t *buf, int len, char socket_index)
                                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 = r_code;
+                               *p = *buf;
                                p[1] = radius[r].id;
                                *(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 (r_code == AccessAccept)
+                       if (*buf == 2)
                        {
                                // Login successful
                                // Extract IP, routes, etc
@@ -472,6 +492,9 @@ void processrad(uint8_t *buf, int len, char socket_index)
                                                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)
                                        {
@@ -623,10 +646,10 @@ void processrad(uint8_t *buf, int len, char socket_index)
                                        }
                                }
                        }
-                       else if (r_code == AccessReject)
+                       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;
                        }
 
@@ -648,7 +671,7 @@ void processrad(uint8_t *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_state(radius[r].state));
+                       LOG(3, s, t, "   RADIUS accounting ack recv in state %s\n", radius_states[radius[r].state]);
                        break;
                }
        } while (0);
@@ -663,9 +686,10 @@ void radiusretry(uint16_t r)
        sessionidt s = radius[r].session;
        tunnelidt t = 0;
 
-       CSTAT(radiusretry);
+       CSTAT(call_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)
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