Put state name into request->component
[freeradius.git] / src / main / process.c
index 416acda..2f0c7f2 100644 (file)
@@ -71,7 +71,7 @@ static char const *action_codes[] = {
 
 #ifdef DEBUG_STATE_MACHINE
 #  define TRACE_STATE_MACHINE \
-if (debug_flag) do { \
+if (rad_debug_lvl) do { \
        struct timeval debug_tv; \
        gettimeofday(&debug_tv, NULL); \
        debug_tv.tv_sec -= fr_start_time; \
@@ -285,6 +285,12 @@ static bool we_are_master(void)
 #  define ASSERT_MASTER
 #endif
 
+/*
+ *     Make state transitions simpler.
+ */
+#define FINAL_STATE(_x) NO_CHILD_THREAD; request->component = "<" #_x ">"; request->module = ""; request->child_state = _x
+
+
 static int event_new_fd(rad_listen_t *this);
 
 /*
@@ -416,31 +422,39 @@ static void debug_packet(REQUEST *request, RADIUS_PACKET *packet, bool received)
         *      This really belongs in a utility library
         */
        if (is_radius_code(packet->code)) {
-               RDEBUG("%s %s Id %i from %s:%i to %s:%i length %zu",
+               RDEBUG("%s %s Id %i from %s%s%s:%i to %s%s%s:%i length %zu",
                       received ? "Received" : "Sent",
                       fr_packet_codes[packet->code],
                       packet->id,
+                      packet->src_ipaddr.af == AF_INET6 ? "[" : "",
                       inet_ntop(packet->src_ipaddr.af,
                                 &packet->src_ipaddr.ipaddr,
                                 src_ipaddr, sizeof(src_ipaddr)),
+                      packet->src_ipaddr.af == AF_INET6 ? "]" : "",
                       packet->src_port,
+                      packet->dst_ipaddr.af == AF_INET6 ? "[" : "",
                       inet_ntop(packet->dst_ipaddr.af,
                                 &packet->dst_ipaddr.ipaddr,
                                 dst_ipaddr, sizeof(dst_ipaddr)),
+                      packet->dst_ipaddr.af == AF_INET6 ? "]" : "",
                       packet->dst_port,
                       packet->data_len);
        } else {
-               RDEBUG("%s code %i Id %i from %s:%i to %s:%i length %zu",
+               RDEBUG("%s code %u Id %i from %s%s%s:%i to %s%s%s:%i length %zu\n",
                       received ? "Received" : "Sent",
                       packet->code,
                       packet->id,
+                      packet->src_ipaddr.af == AF_INET6 ? "[" : "",
                       inet_ntop(packet->src_ipaddr.af,
                                 &packet->src_ipaddr.ipaddr,
                                 src_ipaddr, sizeof(src_ipaddr)),
+                      packet->src_ipaddr.af == AF_INET6 ? "]" : "",
                       packet->src_port,
+                      packet->dst_ipaddr.af == AF_INET6 ? "[" : "",
                       inet_ntop(packet->dst_ipaddr.af,
                                 &packet->dst_ipaddr.ipaddr,
                                 dst_ipaddr, sizeof(dst_ipaddr)),
+                      packet->dst_ipaddr.af == AF_INET6 ? "]" : "",
                       packet->dst_port,
                       packet->data_len);
        }
@@ -605,8 +619,7 @@ static void request_done(REQUEST *request, int action)
         *      and wait for the master thread timer to clean us up.
         */
        if (!we_are_master()) {
-               NO_CHILD_THREAD;
-               request->child_state = REQUEST_DONE;
+               FINAL_STATE(REQUEST_DONE);
                return;
        }
 #endif
@@ -659,7 +672,7 @@ static void request_done(REQUEST *request, int action)
 #endif
 
 #ifdef DEBUG_STATE_MACHINE
-               if (debug_flag) printf("(%u) ********\tSTATE %s C-%s -> C-%s\t********\n",
+               if (rad_debug_lvl) printf("(%u) ********\tSTATE %s C-%s -> C-%s\t********\n",
                                       request->number, __FUNCTION__,
                                       child_state_names[request->child_state],
                                       child_state_names[REQUEST_DONE]);
@@ -800,13 +813,27 @@ static void request_cleanup_delay_init(REQUEST *request)
 
        VERIFY_REQUEST(request);
 
-       if (request->packet->code == PW_CODE_ACCOUNTING_REQUEST) goto done;
+       /*
+        *      Do cleanup delay ONLY for RADIUS packets from a real
+        *      client.  Everything else just gets cleaned up
+        *      immediately.
+        */
+       if (request->packet->dst_port == 0) goto done;
 
-#ifdef WITH_DETAIL
        /*
-        *      If the packets are from the detail file, we can clean them up now.
+        *      Accounting packets shouldn't be retransmitted.  They
+        *      should always be updated with Acct-Delay-Time.
         */
-       if (request->listener->type == RAD_LISTEN_DETAIL) goto done;
+#ifdef WITH_ACCOUNTING
+       if (request->packet->code == PW_CODE_ACCOUNTING_REQUEST) goto done;
+#endif
+
+#ifdef WITH_DHCP
+       if (request->listener->type == RAD_LISTEN_DHCP) goto done;
+#endif
+
+#ifdef WITH_VMPS
+       if (request->listener->type == RAD_LISTEN_VQP) goto done;
 #endif
 
        if (!request->root->cleanup_delay) goto done;
@@ -824,19 +851,23 @@ static void request_cleanup_delay_init(REQUEST *request)
         */
        if (timercmp(&when, &now, >)) {
 #ifdef DEBUG_STATE_MACHINE
-               if (debug_flag) printf("(%u) ********\tNEXT-STATE %s -> %s\n", request->number, __FUNCTION__, "request_cleanup_delay");
+               if (rad_debug_lvl) printf("(%u) ********\tNEXT-STATE %s -> %s\n", request->number, __FUNCTION__, "request_cleanup_delay");
 #endif
                request->process = request_cleanup_delay;
-               request->child_state = REQUEST_CLEANUP_DELAY;
+
+               if (!we_are_master()) {
+                       FINAL_STATE(REQUEST_CLEANUP_DELAY);
+                       return;
+               }
 
                /*
                 *      Update this if we can, otherwise let the timers pick it up.
                 */
-               if (we_are_master()) {
-                       STATE_MACHINE_TIMER(FR_ACTION_TIMER);
-               } else {
-                       NO_CHILD_THREAD;
-               }
+               request->child_state = REQUEST_CLEANUP_DELAY;
+#ifdef HAVE_PTHREAD_H
+               rad_assert(request->child_pid == NO_SUCH_CHILD_PID);
+#endif
+               STATE_MACHINE_TIMER(FR_ACTION_TIMER);
                return;
        }
 
@@ -851,7 +882,7 @@ done:
 /*
  *     Enforce max_request_time.
  */
-static void request_max_time(REQUEST *request)
+static bool request_max_time(REQUEST *request)
 {
        struct timeval now, when;
        rad_assert(request->magic == REQUEST_MAGIC);
@@ -874,7 +905,7 @@ static void request_max_time(REQUEST *request)
        if (request->child_state == REQUEST_DONE) {
        done:
                request_done(request, FR_ACTION_DONE);
-               return;
+               return true;
        }
 
        /*
@@ -917,6 +948,7 @@ static void request_max_time(REQUEST *request)
        tv_add(&when, request->delay);
        request->delay += request->delay >> 1;
        STATE_MACHINE_TIMER(FR_ACTION_TIMER);
+       return false;
 }
 
 static void request_queue_or_run(REQUEST *request,
@@ -936,7 +968,7 @@ static void request_queue_or_run(REQUEST *request,
         */
        if (request->master_state == REQUEST_STOP_PROCESSING) {
 #ifdef DEBUG_STATE_MACHINE
-               if (debug_flag) printf("(%u) ********\tSTATE %s M-%s causes C-%s-> C-%s\t********\n",
+               if (rad_debug_lvl) printf("(%u) ********\tSTATE %s M-%s causes C-%s-> C-%s\t********\n",
                                       request->number, __FUNCTION__,
                                       master_state_names[request->master_state],
                                       child_state_names[request->child_state],
@@ -1074,7 +1106,7 @@ static void request_cleanup_delay(REQUEST *request, int action)
 
                if (timercmp(&when, &now, >)) {
 #ifdef DEBUG_STATE_MACHINE
-                       if (debug_flag) printf("(%u) ********\tNEXT-STATE %s -> %s\n", request->number, __FUNCTION__, "request_cleanup_delay");
+                       if (rad_debug_lvl) printf("(%u) ********\tNEXT-STATE %s -> %s\n", request->number, __FUNCTION__, "request_cleanup_delay");
 #endif
                        STATE_MACHINE_TIMER(FR_ACTION_TIMER);
                        return;
@@ -1137,8 +1169,6 @@ static void request_response_delay(REQUEST *request, int action)
        case FR_ACTION_TIMER:
                fr_event_now(el, &now);
 
-               rad_assert(request->response_delay.tv_sec > 0);
-
                /*
                 *      See if it's time to send the reply.  If not,
                 *      we wait some more.
@@ -1150,7 +1180,7 @@ static void request_response_delay(REQUEST *request, int action)
 
                if (timercmp(&when, &now, >)) {
 #ifdef DEBUG_STATE_MACHINE
-                       if (debug_flag) printf("(%u) ********\tNEXT-STATE %s -> %s\n", request->number, __FUNCTION__, "request_response_delay");
+                       if (rad_debug_lvl) printf("(%u) ********\tNEXT-STATE %s -> %s\n", request->number, __FUNCTION__, "request_response_delay");
 #endif
                        STATE_MACHINE_TIMER(FR_ACTION_TIMER);
                        return;
@@ -1189,8 +1219,8 @@ static int request_pre_handler(REQUEST *request, UNUSED int action)
         *      process it.
         */
        if (request->packet->dst_port == 0) {
-               request->username = pairfind(request->packet->vps, PW_USER_NAME, 0, TAG_ANY);
-               request->password = pairfind(request->packet->vps, PW_USER_PASSWORD, 0, TAG_ANY);
+               request->username = fr_pair_find_by_num(request->packet->vps, PW_USER_NAME, 0, TAG_ANY);
+               request->password = fr_pair_find_by_num(request->packet->vps, PW_USER_PASSWORD, 0, TAG_ANY);
                return 1;
        }
 
@@ -1221,7 +1251,7 @@ static int request_pre_handler(REQUEST *request, UNUSED int action)
        }
 
        if (!request->username) {
-               request->username = pairfind(request->packet->vps, PW_USER_NAME, 0, TAG_ANY);
+               request->username = fr_pair_find_by_num(request->packet->vps, PW_USER_NAME, 0, TAG_ANY);
        }
 
        return 1;
@@ -1256,7 +1286,7 @@ static void request_finish(REQUEST *request, int action)
        /*
         *      Override the response code if a control:Response-Packet-Type attribute is present.
         */
-       vp = pairfind(request->config, PW_RESPONSE_PACKET_TYPE, 0, TAG_ANY);
+       vp = fr_pair_find_by_num(request->config, PW_RESPONSE_PACKET_TYPE, 0, TAG_ANY);
        if (vp) {
                if (vp->vp_integer == 256) {
                        RDEBUG2("Not responding to request");
@@ -1270,7 +1300,7 @@ static void request_finish(REQUEST *request, int action)
         */
        else if (request->packet->code == PW_CODE_ACCESS_REQUEST) {
                if (request->reply->code == 0) {
-                       vp = pairfind(request->config, PW_AUTH_TYPE, 0, TAG_ANY);
+                       vp = fr_pair_find_by_num(request->config, PW_AUTH_TYPE, 0, TAG_ANY);
                        if (!vp || (vp->vp_integer != 5)) {
                                RDEBUG2("There was no response configured: "
                                        "rejecting request");
@@ -1283,9 +1313,9 @@ static void request_finish(REQUEST *request, int action)
        /*
         *      Copy Proxy-State from the request to the reply.
         */
-       vp = paircopy_by_num(request->reply, request->packet->vps,
+       vp = fr_pair_list_copy_by_num(request->reply, request->packet->vps,
                       PW_PROXY_STATE, 0, TAG_ANY);
-       if (vp) pairadd(&request->reply->vps, vp);
+       if (vp) fr_pair_add(&request->reply->vps, vp);
 
        /*
         *      Call Post-Auth for Access-Request packets.
@@ -1294,6 +1324,14 @@ static void request_finish(REQUEST *request, int action)
                rad_postauth(request);
        }
 
+#ifdef WITH_COA
+       /*
+        *      Maybe originate a CoA request.
+        */
+       if ((action == FR_ACTION_RUN) && !request->proxy && request->coa) {
+               request_coa_originate(request);
+       }
+#endif
 
        /*
         *      Clean up.  These are no longer needed.
@@ -1307,8 +1345,7 @@ static void request_finish(REQUEST *request, int action)
         */
        if (request->packet->dst_port == 0) {
                RDEBUG("Finished internally proxied request.");
-               NO_CHILD_THREAD;
-               request->child_state = REQUEST_DONE;
+               FINAL_STATE(REQUEST_DONE);
                return;
        }
 
@@ -1318,13 +1355,15 @@ static void request_finish(REQUEST *request, int action)
         */
        if (request->listener->type == RAD_LISTEN_DETAIL) {
                request->simul_max = 1;
-               request->listener->send(request->listener, request);
+
                /*
                 *      But only print the reply if there is one.
                 */
                if (request->reply->code != 0) {
                        debug_packet(request, request->reply, false);
                }
+
+               request->listener->send(request->listener, request);
                goto done;
        }
 #endif
@@ -1369,6 +1408,27 @@ static void request_finish(REQUEST *request, int action)
            (request->root->reject_delay.tv_sec > 0)) {
                request->response_delay = request->root->reject_delay;
 
+               vp = fr_pair_find_by_num(request->reply->vps, PW_FREERADIUS_RESPONSE_DELAY, 0, TAG_ANY);
+               if (vp) {
+                       if (vp->vp_integer <= 10) {
+                               request->response_delay.tv_sec = vp->vp_integer;
+                       } else {
+                               request->response_delay.tv_sec = 10;
+                       }
+                       request->response_delay.tv_usec = 0;
+               } else {
+                       vp = fr_pair_find_by_num(request->reply->vps, PW_FREERADIUS_RESPONSE_DELAY_USEC, 0, TAG_ANY);
+                       if (vp) {
+                               if (vp->vp_integer <= 10 * USEC) {
+                                       request->response_delay.tv_sec = vp->vp_integer / USEC;
+                                       request->response_delay.tv_usec = vp->vp_integer % USEC;
+                               } else {
+                                       request->response_delay.tv_sec = 10;
+                                       request->response_delay.tv_usec = 0;
+                               }
+                       }
+               }
+
 #ifdef WITH_PROXY
                /*
                 *      If we timed out a proxy packet, don't delay
@@ -1384,62 +1444,26 @@ static void request_finish(REQUEST *request, int action)
        /*
         *      Send the reply.
         */
-       if (request->response_delay.tv_sec == 0) {
-               rad_assert(request->response_delay.tv_usec == 0);
+       if ((request->response_delay.tv_sec == 0) &&
+           (request->response_delay.tv_usec == 0)) {
 
                /*
                 *      Don't print a reply if there's none to send.
                 */
                if (request->reply->code != 0) {
-                       request->listener->send(request->listener, request);
+                       if (rad_debug_lvl && request->state &&
+                           (request->reply->code == PW_CODE_ACCESS_ACCEPT)) {
+                               if (!fr_pair_find_by_num(request->packet->vps, PW_STATE, 0, TAG_ANY)) {
+                                       RWDEBUG2("Unused attributes found in &session-state:");
+                               }
+                       }
+
                        debug_packet(request, request->reply, false);
+                       request->listener->send(request->listener, request);
                }
 
        done:
                RDEBUG2("Finished request");
-               request->component = "<core>";
-               request->module = "<done>";
-
-#ifdef WITH_ACCOUNTING
-               /*
-                *      Accounting packets can be cleaned up now.
-                */
-               if (request->packet->code == PW_CODE_ACCOUNTING_REQUEST) {
-                       NO_CHILD_THREAD;
-                       request->child_state = REQUEST_DONE;
-                       return;
-               }
-#endif
-
-#ifdef WITH_DETAIL
-               /*
-                *      If the packets are from the detail file, we can clean them up now.
-                */
-               if (request->listener->type == RAD_LISTEN_DETAIL) {
-                       NO_CHILD_THREAD;
-                       request->child_state = REQUEST_DONE;
-                       return;
-               }
-#endif
-
-#ifdef WITH_COA
-               /*
-                *      If we've originated this CoA request, it gets
-                *      cleaned up now.
-                */
-               if (request->proxy &&
-                   ((request->proxy->code == PW_CODE_COA_REQUEST) ||
-                   (request->proxy->code == PW_CODE_DISCONNECT_REQUEST)) &&
-                   (request->packet->code != request->proxy->code)) {
-                       NO_CHILD_THREAD;
-                       request->child_state = REQUEST_DONE;
-                       return;
-               }
-#endif
-
-               /*
-                *      Clean up the request.
-                */
                request_cleanup_delay_init(request);
 
        } else {
@@ -1451,11 +1475,9 @@ static void request_finish(REQUEST *request, int action)
                RDEBUG2("Delaying response for %d.%06d seconds",
                        (int) request->response_delay.tv_sec, (int) request->response_delay.tv_usec);
                request->listener->encode(request->listener, request);
-               request->component = "<core>";
-               request->module = "<delay>";
                request->process = request_response_delay;
-               NO_CHILD_THREAD;
-               request->child_state = REQUEST_RESPONSE_DELAY;
+
+               FINAL_STATE(REQUEST_RESPONSE_DELAY);
        }
 }
 
@@ -1482,7 +1504,7 @@ static void request_running(REQUEST *request, int action)
        switch (action) {
        case FR_ACTION_TIMER:
                COA_SEPARATE;
-               request_max_time(request);
+               (void) request_max_time(request);
                break;
 
        case FR_ACTION_DUP:
@@ -1492,14 +1514,12 @@ static void request_running(REQUEST *request, int action)
        case FR_ACTION_RUN:
                if (!request_pre_handler(request, action)) {
 #ifdef DEBUG_STATE_MACHINE
-                       if (debug_flag) printf("(%u) ********\tSTATE %s failed in pre-handler C-%s -> C-%s\t********\n",
+                       if (rad_debug_lvl) printf("(%u) ********\tSTATE %s failed in pre-handler C-%s -> C-%s\t********\n",
                                               request->number, __FUNCTION__,
                                               child_state_names[request->child_state],
                                               child_state_names[REQUEST_DONE]);
 #endif
-
-                       NO_CHILD_THREAD;
-                       request->child_state = REQUEST_DONE;
+                       FINAL_STATE(REQUEST_DONE);
                        break;
                }
 
@@ -1513,7 +1533,7 @@ static void request_running(REQUEST *request, int action)
                if ((action == FR_ACTION_RUN) &&
                    request_will_proxy(request)) {
 #ifdef DEBUG_STATE_MACHINE
-                       if (debug_flag) printf("(%u) ********\tWill Proxy\t********\n", request->number);
+                       if (rad_debug_lvl) printf("(%u) ********\tWill Proxy\t********\n", request->number);
 #endif
                        /*
                         *      If this fails, it
@@ -1526,16 +1546,7 @@ static void request_running(REQUEST *request, int action)
 #endif
                {
 #ifdef DEBUG_STATE_MACHINE
-                       if (debug_flag) printf("(%u) ********\tFinished\t********\n", request->number);
-#endif
-
-#ifdef WITH_COA
-                       /*
-                        *      Maybe originate a CoA request.
-                        */
-                       if ((action == FR_ACTION_RUN) && request->coa) {
-                               request_coa_originate(request);
-                       }
+                       if (rad_debug_lvl) printf("(%u) ********\tFinished\t********\n", request->number);
 #endif
 
 #ifdef WITH_PROXY
@@ -1575,6 +1586,10 @@ int request_receive(TALLOC_CTX *ctx, rad_listen_t *listener, RADIUS_PACKET *pack
        {
                sock = listener->data;
                sock->last_packet = now.tv_sec;
+
+#ifdef WITH_TCP
+               packet->proto = sock->proto;
+#endif
        }
 
        /*
@@ -1700,6 +1715,7 @@ skip_dup:
        if (!ctx) {
                ctx = talloc_pool(NULL, main_config.talloc_pool_size);
                if (!ctx) return 0;
+               talloc_set_name_const(ctx, "request_receive_pool");
 
                /*
                 *      The packet is still allocated from a different
@@ -1741,8 +1757,8 @@ skip_dup:
 #endif
 
                request->listener->decode(request->listener, request);
-               request->username = pairfind(request->packet->vps, PW_USER_NAME, 0, TAG_ANY);
-               request->password = pairfind(request->packet->vps, PW_USER_PASSWORD, 0, TAG_ANY);
+               request->username = fr_pair_find_by_num(request->packet->vps, PW_USER_NAME, 0, TAG_ANY);
+               request->password = fr_pair_find_by_num(request->packet->vps, PW_USER_PASSWORD, 0, TAG_ANY);
 
                fun(request);
 
@@ -1797,14 +1813,11 @@ static REQUEST *request_setup(TALLOC_CTX *ctx, rad_listen_t *listener, RADIUS_PA
        request->master_state = REQUEST_ACTIVE;
        request->child_state = REQUEST_RUNNING;
 #ifdef DEBUG_STATE_MACHINE
-       if (debug_flag) printf("(%u) ********\tSTATE %s C-%s -> C-%s\t********\n",
+       if (rad_debug_lvl) printf("(%u) ********\tSTATE %s C-%s -> C-%s\t********\n",
                               request->number, __FUNCTION__,
                               child_state_names[request->child_state],
                               child_state_names[REQUEST_RUNNING]);
 #endif
-#ifdef HAVE_PTHREAD_H
-       request->child_pid = NO_SUCH_CHILD_PID;
-#endif
        request->handle = fun;
        NO_CHILD_THREAD;
 
@@ -2130,7 +2143,6 @@ static void remove_from_proxy_hash_nl(REQUEST *request, bool yank)
         *      the mutex.  This guarantees that when another thread
         *      grabs the mutex, the "not in hash" flag is correct.
         */
-       RDEBUG3("proxy: request is no longer in proxy hash");
 }
 
 static void remove_from_proxy_hash(REQUEST *request)
@@ -2290,13 +2302,13 @@ static int process_proxy_reply(REQUEST *request, RADIUS_PACKET *reply)
         *      Delete any reply we had accumulated until now.
         */
        RDEBUG2("Clearing existing &reply: attributes");
-       pairfree(&request->reply->vps);
+       fr_pair_list_free(&request->reply->vps);
 
        /*
         *      Run the packet through the post-proxy stage,
         *      BEFORE playing games with the attributes.
         */
-       vp = pairfind(request->config, PW_POST_PROXY_TYPE, 0, TAG_ANY);
+       vp = fr_pair_find_by_num(request->config, PW_POST_PROXY_TYPE, 0, TAG_ANY);
        if (vp) {
                post_proxy_type = vp->vp_integer;
        /*
@@ -2333,7 +2345,7 @@ static int process_proxy_reply(REQUEST *request, RADIUS_PACKET *reply)
                 *      Create config:Post-Proxy-Type
                 */
                if (dval) {
-                       vp = radius_paircreate(request, &request->config, PW_POST_PROXY_TYPE, 0);
+                       vp = radius_pair_create(request, &request->config, PW_POST_PROXY_TYPE, 0);
                        vp->vp_integer = dval->value;
                }
        }
@@ -2396,14 +2408,14 @@ static int process_proxy_reply(REQUEST *request, RADIUS_PACKET *reply)
         *      running Post-Proxy-Type = Fail.
         */
        if (reply) {
-               pairadd(&request->reply->vps, paircopy(request->reply, reply->vps));
+               fr_pair_add(&request->reply->vps, fr_pair_list_copy(request->reply, reply->vps));
 
                /*
                 *      Delete the Proxy-State Attributes from
                 *      the reply.  These include Proxy-State
                 *      attributes from us and remote server.
                 */
-               pairdelete(&request->reply->vps, PW_PROXY_STATE, 0, TAG_ANY);
+               fr_pair_delete_by_num(&request->reply->vps, PW_PROXY_STATE, 0, TAG_ANY);
        }
 
        switch (rcode) {
@@ -2419,6 +2431,28 @@ static int process_proxy_reply(REQUEST *request, RADIUS_PACKET *reply)
        return 1;
 }
 
+static void mark_home_server_alive(REQUEST *request, home_server_t *home)
+{
+       char buffer[128];
+
+       home->state = HOME_STATE_ALIVE;
+       home->response_timeouts = 0;
+       exec_trigger(request, home->cs, "home_server.alive", false);
+       home->currently_outstanding = 0;
+       home->num_sent_pings = 0;
+       home->num_received_pings = 0;
+       gettimeofday(&home->revive_time, NULL);
+
+       fr_event_delete(el, &home->ev);
+
+       RPROXY("Marking home server %s port %d alive",
+              inet_ntop(request->proxy->dst_ipaddr.af,
+                        &request->proxy->dst_ipaddr.ipaddr,
+                        buffer, sizeof(buffer)),
+              request->proxy->dst_port);
+}
+
+
 int request_proxy_reply(RADIUS_PACKET *packet)
 {
        RADIUS_PACKET **proxy_p;
@@ -2433,7 +2467,8 @@ int request_proxy_reply(RADIUS_PACKET *packet)
 
        if (!proxy_p) {
                PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
-               PROXY("No outstanding request was found for reply from host %s port %d - ID %u",
+               PROXY("No outstanding request was found for %s packet from host %s port %d - ID %u",
+                      fr_packet_codes[packet->code],
                       inet_ntop(packet->src_ipaddr.af,
                                 &packet->src_ipaddr.ipaddr,
                                 buffer, sizeof(buffer)),
@@ -2557,12 +2592,13 @@ int request_proxy_reply(RADIUS_PACKET *packet)
 #endif
 
        /*
-        *      We've received a reply.  If we hadn't been sending it
-        *      packets for a while, just mark it alive.
+        *      If we hadn't been sending the home server packets for
+        *      a while, just mark it alive.  Or, if it was zombie,
+        *      it's now responded, and is therefore alive.
         */
-       if (request->home_server->state == HOME_STATE_UNKNOWN) {
-               request->home_server->state = HOME_STATE_ALIVE;
-               request->home_server->response_timeouts = 0;
+       if ((request->home_server->state == HOME_STATE_UNKNOWN) ||
+           (request->home_server->state == HOME_STATE_ZOMBIE)) {
+               mark_home_server_alive(request, request->home_server);
        }
 
        /*
@@ -2586,9 +2622,12 @@ static int setup_post_proxy_fail(REQUEST *request)
        if (request->proxy->code == PW_CODE_ACCESS_REQUEST) {
                dval = dict_valbyname(PW_POST_PROXY_TYPE, 0,
                                      "Fail-Authentication");
+#ifdef WITH_ACCOUNTING
        } else if (request->proxy->code == PW_CODE_ACCOUNTING_REQUEST) {
                dval = dict_valbyname(PW_POST_PROXY_TYPE, 0,
                                      "Fail-Accounting");
+#endif
+
 #ifdef WITH_COA
        } else if (request->proxy->code == PW_CODE_COA_REQUEST) {
                dval = dict_valbyname(PW_POST_PROXY_TYPE, 0, "Fail-CoA");
@@ -2604,12 +2643,12 @@ static int setup_post_proxy_fail(REQUEST *request)
        if (!dval) dval = dict_valbyname(PW_POST_PROXY_TYPE, 0, "Fail");
 
        if (!dval) {
-               pairdelete(&request->config, PW_POST_PROXY_TYPE, 0, TAG_ANY);
+               fr_pair_delete_by_num(&request->config, PW_POST_PROXY_TYPE, 0, TAG_ANY);
                return 0;
        }
 
-       vp = pairfind(request->config, PW_POST_PROXY_TYPE, 0, TAG_ANY);
-       if (!vp) vp = radius_paircreate(request, &request->config,
+       vp = fr_pair_find_by_num(request->config, PW_POST_PROXY_TYPE, 0, TAG_ANY);
+       if (!vp) vp = radius_pair_create(request, &request->config,
                                        PW_POST_PROXY_TYPE, 0);
        vp->vp_integer = dval->value;
 
@@ -2646,7 +2685,7 @@ static void proxy_no_reply(REQUEST *request, int action)
                break;
 
        case FR_ACTION_TIMER:
-               request_max_time(request);
+               (void) request_max_time(request);
                break;
 
        case FR_ACTION_PROXY_REPLY:
@@ -2695,7 +2734,7 @@ static void proxy_running(REQUEST *request, int action)
                break;
 
        case FR_ACTION_TIMER:
-               request_max_time(request);
+               (void) request_max_time(request);
                break;
 
        case FR_ACTION_RUN:
@@ -2718,10 +2757,10 @@ static void proxy_running(REQUEST *request, int action)
  * request may be proxied.
  *
  * The key attributes are:
- *   - #PW_PROXY_TO_REALM          - Specifies a realm the request should be proxied to.
- *   - #PW_HOME_SERVER_POOL        - Specifies a specific home server pool to proxy to.
- *   - #PW_PACKET_DST_IP_ADDRESS   - Specifies a specific IPv4 home server to proxy to.
- *   - #PW_PACKET_DST_IPV6_ADDRESS - Specifies a specific IPv6 home server to proxy to.
+ *   - PW_PROXY_TO_REALM          - Specifies a realm the request should be proxied to.
+ *   - PW_HOME_SERVER_POOL        - Specifies a specific home server pool to proxy to.
+ *   - PW_PACKET_DST_IP_ADDRESS   - Specifies a specific IPv4 home server to proxy to.
+ *   - PW_PACKET_DST_IPV6_ADDRESS - Specifies a specific IPv6 home server to proxy to.
  *
  * Certain packet types such as #PW_CODE_STATUS_SERVER will never be proxied.
  *
@@ -2760,7 +2799,7 @@ static int request_will_proxy(REQUEST *request)
         */
        if (request->reply->code != 0) return 0;
 
-       vp = pairfind(request->config, PW_PROXY_TO_REALM, 0, TAG_ANY);
+       vp = fr_pair_find_by_num(request->config, PW_PROXY_TO_REALM, 0, TAG_ANY);
        if (vp) {
                realm = realm_find2(vp->vp_strvalue);
                if (!realm) {
@@ -2792,7 +2831,7 @@ static int request_will_proxy(REQUEST *request)
                        return 0;
                }
 
-       } else if ((vp = pairfind(request->config, PW_HOME_SERVER_POOL, 0, TAG_ANY)) != NULL) {
+       } else if ((vp = fr_pair_find_by_num(request->config, PW_HOME_SERVER_POOL, 0, TAG_ANY)) != NULL) {
                int pool_type;
 
                switch (request->packet->code) {
@@ -2819,12 +2858,11 @@ static int request_will_proxy(REQUEST *request)
 
                pool = home_pool_byname(vp->vp_strvalue, pool_type);
 
-       /*
-        *      Send it directly to a home server (i.e. NAS)
-        */
-       } else if (((vp = pairfind(request->config, PW_PACKET_DST_IP_ADDRESS, 0, TAG_ANY)) != NULL) ||
-                  ((vp = pairfind(request->config, PW_PACKET_DST_IPV6_ADDRESS, 0, TAG_ANY)) != NULL)) {
-               VALUE_PAIR *port;
+               /*
+                *      Send it directly to a home server (i.e. NAS)
+                */
+       } else if (((vp = fr_pair_find_by_num(request->config, PW_PACKET_DST_IP_ADDRESS, 0, TAG_ANY)) != NULL) ||
+                  ((vp = fr_pair_find_by_num(request->config, PW_PACKET_DST_IPV6_ADDRESS, 0, TAG_ANY)) != NULL)) {
                uint16_t dst_port;
                fr_ipaddr_t dst_ipaddr;
 
@@ -2840,9 +2878,25 @@ static int request_will_proxy(REQUEST *request)
                        dst_ipaddr.prefix = 128;
                }
 
-               port = pairfind(request->config, PW_PACKET_DST_PORT, 0, TAG_ANY);
-               if (!port) {
-               dst_port = PW_COA_UDP_PORT;
+               vp = fr_pair_find_by_num(request->config, PW_PACKET_DST_PORT, 0, TAG_ANY);
+               if (!vp) {
+                       if (request->packet->code == PW_CODE_ACCESS_REQUEST) {
+                               dst_port = PW_AUTH_UDP_PORT;
+
+#ifdef WITH_ACCOUNTING
+                       } else if (request->packet->code == PW_CODE_ACCOUNTING_REQUEST) {
+                               dst_port = PW_ACCT_UDP_PORT;
+#endif
+
+#ifdef WITH_COA
+                       } else if ((request->packet->code == PW_CODE_COA_REQUEST) ||
+                                  (request->packet->code == PW_CODE_DISCONNECT_REQUEST)) {
+                               dst_port = PW_COA_UDP_PORT;
+#endif
+                       } else { /* shouldn't happen for RADIUS... */
+                               return 0;
+                       }
+
                } else {
                        dst_port = vp->vp_integer;
                }
@@ -2854,13 +2908,25 @@ static int request_will_proxy(REQUEST *request)
                if (!home) {
                        char buffer[256];
 
-                       WARN("No such CoA home server %s port %u",
+                       WARN("No such home server %s port %u",
                             inet_ntop(dst_ipaddr.af, &dst_ipaddr.ipaddr, buffer, sizeof(buffer)),
                             (unsigned int) dst_port);
                        return 0;
                }
 
-               goto do_home;
+               /*
+                *      The home server is alive (or may be alive).
+                *      Send the packet to the IP.
+                */
+               if (home->state != HOME_STATE_IS_DEAD) goto do_home;
+
+               /*
+                *      The home server is dead.  If you wanted
+                *      fail-over, you should have proxied to a pool.
+                *      Sucks to be you.
+                */
+
+               return 0;
 
        } else {
                return 0;
@@ -2899,7 +2965,7 @@ do_home:
        /*
         *      Remember that we sent the request to a Realm.
         */
-       if (realmname) pairmake_packet("Realm", realmname, T_OP_EQ);
+       if (realmname) pair_make_request("Realm", realmname, T_OP_EQ);
 
        /*
         *      Strip the name, if told to.
@@ -2908,7 +2974,7 @@ do_home:
         *      requests.
         */
        if (realm && (realm->strip_realm == true) &&
-          (strippedname = pairfind(request->proxy->vps, PW_STRIPPED_USER_NAME, 0, TAG_ANY)) != NULL) {
+          (strippedname = fr_pair_find_by_num(request->proxy->vps, PW_STRIPPED_USER_NAME, 0, TAG_ANY)) != NULL) {
                /*
                 *      If there's a Stripped-User-Name attribute in
                 *      the request, then use THAT as the User-Name
@@ -2922,10 +2988,10 @@ do_home:
                 *      from the vps list, and making the new
                 *      User-Name the head of the vps list.
                 */
-               vp = pairfind(request->proxy->vps, PW_USER_NAME, 0, TAG_ANY);
+               vp = fr_pair_find_by_num(request->proxy->vps, PW_USER_NAME, 0, TAG_ANY);
                if (!vp) {
                        vp_cursor_t cursor;
-                       vp = radius_paircreate(NULL, NULL,
+                       vp = radius_pair_create(NULL, NULL,
                                               PW_USER_NAME, 0);
                        rad_assert(vp != NULL); /* handled by above function */
                        /* Insert at the START of the list */
@@ -2934,7 +3000,7 @@ do_home:
                        fr_cursor_merge(&cursor, request->proxy->vps);
                        request->proxy->vps = vp;
                }
-               pairstrcpy(vp, strippedname->vp_strvalue);
+               fr_pair_value_strcpy(vp, strippedname->vp_strvalue);
 
                /*
                 *      Do NOT delete Stripped-User-Name.
@@ -2948,18 +3014,18 @@ do_home:
         *      anymore - we changed it.
         */
        if ((request->packet->code == PW_CODE_ACCESS_REQUEST) &&
-           pairfind(request->proxy->vps, PW_CHAP_PASSWORD, 0, TAG_ANY) &&
-           pairfind(request->proxy->vps, PW_CHAP_CHALLENGE, 0, TAG_ANY) == NULL) {
-               vp = radius_paircreate(request->proxy, &request->proxy->vps, PW_CHAP_CHALLENGE, 0);
-               pairmemcpy(vp, request->packet->vector, sizeof(request->packet->vector));
+           fr_pair_find_by_num(request->proxy->vps, PW_CHAP_PASSWORD, 0, TAG_ANY) &&
+           fr_pair_find_by_num(request->proxy->vps, PW_CHAP_CHALLENGE, 0, TAG_ANY) == NULL) {
+               vp = radius_pair_create(request->proxy, &request->proxy->vps, PW_CHAP_CHALLENGE, 0);
+               fr_pair_value_memcpy(vp, request->packet->vector, sizeof(request->packet->vector));
        }
 
        /*
         *      The RFC's say we have to do this, but FreeRADIUS
         *      doesn't need it.
         */
-       vp = radius_paircreate(request->proxy, &request->proxy->vps, PW_PROXY_STATE, 0);
-       pairsprintf(vp, "%u", request->packet->id);
+       vp = radius_pair_create(request->proxy, &request->proxy->vps, PW_PROXY_STATE, 0);
+       fr_pair_value_sprintf(vp, "%u", request->packet->id);
 
        /*
         *      Should be done BEFORE inserting into proxy hash, as
@@ -2970,7 +3036,7 @@ do_home:
        /*
         *      Call the pre-proxy routines.
         */
-       vp = pairfind(request->config, PW_PRE_PROXY_TYPE, 0, TAG_ANY);
+       vp = fr_pair_find_by_num(request->config, PW_PRE_PROXY_TYPE, 0, TAG_ANY);
        if (vp) {
                DICT_VALUE const *dval = dict_valbyattr(vp->da->attr, vp->da->vendor, vp->vp_integer);
                /* Must be a validation issue */
@@ -3022,6 +3088,67 @@ do_home:
        }
 }
 
+static int proxy_to_virtual_server(REQUEST *request)
+{
+       REQUEST *fake;
+
+       if (request->packet->dst_port == 0) {
+               WARN("Cannot proxy an internal request");
+               return 0;
+       }
+
+       DEBUG("Proxying to virtual server %s",
+             request->home_server->server);
+
+       /*
+        *      Packets to virtual servers don't get
+        *      retransmissions sent to them.  And the virtual
+        *      server is run ONLY if we have no child
+        *      threads, or we're running in a child thread.
+        */
+       rad_assert(!spawn_flag || !we_are_master());
+
+       fake = request_alloc_fake(request);
+
+       fake->packet->vps = fr_pair_list_copy(fake->packet, request->packet->vps);
+       talloc_free(request->proxy);
+
+       fake->server = request->home_server->server;
+       fake->handle = request->handle;
+       fake->process = NULL; /* should never be run for anything */
+
+       /*
+        *      Run the virtual server.
+        */
+       request_running(fake, FR_ACTION_RUN);
+
+       request->proxy = talloc_steal(request, fake->packet);
+       fake->packet = NULL;
+       request->proxy_reply = talloc_steal(request, fake->reply);
+       fake->reply = NULL;
+
+       talloc_free(fake);
+
+       /*
+        *      No reply code, toss the reply we have,
+        *      and do post-proxy-type Fail.
+        */
+       if (!request->proxy_reply->code) {
+               TALLOC_FREE(request->proxy_reply);
+               setup_post_proxy_fail(request);
+       }
+
+       /*
+        *      Do the proxy reply (if any)
+        */
+       if (process_proxy_reply(request, request->proxy_reply)) {
+               request->handle(request);
+       }
+
+       return -1;      /* so we call request_finish */
+}
+
+
 static int request_proxy(REQUEST *request, int retransmit)
 {
        char buffer[128];
@@ -3051,65 +3178,7 @@ static int request_proxy(REQUEST *request, int retransmit)
         *
         *      So, we have some horrible hacks to get around that.
         */
-       if (request->home_server->server) {
-               REQUEST *fake;
-
-               if (request->packet->dst_port == 0) {
-                       WARN("Cannot proxy an internal request");
-                       return 0;
-               }
-
-               DEBUG("Proxying to virtual server %s",
-                     request->home_server->server);
-
-               /*
-                *      Packets to virtual serrers don't get
-                *      retransmissions sent to them.  And the virtual
-                *      server is run ONLY if we have no child
-                *      threads, or we're running in a child thread.
-                */
-               rad_assert(retransmit == 0);
-               rad_assert(!spawn_flag || !we_are_master());
-
-               fake = request_alloc_fake(request);
-
-               fake->packet->vps = paircopy(fake->packet, request->packet->vps);
-               talloc_free(request->proxy);
-
-               fake->server = request->home_server->server;
-               fake->handle = request->handle;
-               fake->process = NULL; /* should never be run for anything */
-
-               /*
-                *      Run the virtual server.
-                */
-               request_running(fake, FR_ACTION_RUN);
-
-               request->proxy = talloc_steal(request, fake->packet);
-               fake->packet = NULL;
-               request->proxy_reply = talloc_steal(request, fake->reply);
-               fake->reply = NULL;
-
-               talloc_free(fake);
-
-               /*
-                *      No reply code, toss the reply we have,
-                *      and do post-proxy-type Fail.
-                */
-               if (!request->proxy_reply->code) {
-                       TALLOC_FREE(request->proxy_reply);
-                       setup_post_proxy_fail(request);
-               }
-
-               /*
-                *      Do the proxy reply (if any)
-                */
-               if (process_proxy_reply(request, request->proxy_reply)) {
-                       request->handle(request);
-               }
-
-               return -1;      /* so we call request_finish */
-       }
+       if (request->home_server->server) return proxy_to_virtual_server(request);
 
        /*
         *      We're actually sending a proxied packet.  Do that now.
@@ -3121,7 +3190,7 @@ static int request_proxy(REQUEST *request, int retransmit)
 
        rad_assert(request->proxy->id >= 0);
 
-       if (debug_flag) {
+       if (rad_debug_lvl) {
                struct timeval *response_window;
 
                response_window = request_response_window(request);
@@ -3161,9 +3230,15 @@ static int request_proxy(REQUEST *request, int retransmit)
        /*
         *      Set the state function, then the state, no child, and
         *      send the packet.
+        *
+        *      The order here is different from other state changes
+        *      due to race conditions with replies from the home
+        *      server.
         */
        request->process = proxy_wait_for_reply;
        request->child_state = REQUEST_PROXIED;
+       request->component = "<REQUEST_PROXIED>";
+       request->module = "";
        NO_CHILD_THREAD;
 
        /*
@@ -3208,19 +3283,6 @@ static int request_proxy_anew(REQUEST *request)
                }
                return 0;
        }
-       home_server_update_request(home, request);
-
-       if (!insert_into_proxy_hash(request)) {
-               RPROXY("Failed to insert retransmission into the proxy list");
-               goto post_proxy_fail;
-       }
-
-       /*
-        *      Free the old packet, to force re-encoding
-        */
-       talloc_free(request->proxy->data);
-       request->proxy->data = NULL;
-       request->proxy->data_len = 0;
 
 #ifdef WITH_ACCOUNTING
        /*
@@ -3229,8 +3291,8 @@ static int request_proxy_anew(REQUEST *request)
        if (request->packet->code == PW_CODE_ACCOUNTING_REQUEST) {
                VALUE_PAIR *vp;
 
-               vp = pairfind(request->proxy->vps, PW_ACCT_DELAY_TIME, 0, TAG_ANY);
-               if (!vp) vp = radius_paircreate(request->proxy,
+               vp = fr_pair_find_by_num(request->proxy->vps, PW_ACCT_DELAY_TIME, 0, TAG_ANY);
+               if (!vp) vp = radius_pair_create(request->proxy,
                                                &request->proxy->vps,
                                                PW_ACCT_DELAY_TIME, 0);
                if (vp) {
@@ -3242,6 +3304,33 @@ static int request_proxy_anew(REQUEST *request)
        }
 #endif
 
+       /*
+        *      May have failed over to a "fallback" virtual server.
+        *      If so, run that instead of doing proxying to a real
+        *      server.
+        */
+       if (home->server) {
+               request->home_server = home;
+               TALLOC_FREE(request->proxy);
+
+               (void) proxy_to_virtual_server(request);
+               return 0;
+       }
+
+       home_server_update_request(home, request);
+
+       if (!insert_into_proxy_hash(request)) {
+               RPROXY("Failed to insert retransmission into the proxy list");
+               goto post_proxy_fail;
+       }
+
+       /*
+        *      Free the old packet, to force re-encoding
+        */
+       talloc_free(request->proxy->data);
+       request->proxy->data = NULL;
+       request->proxy->data_len = 0;
+
        if (request_proxy(request, 1) != 1) goto post_proxy_fail;
 
        return 1;
@@ -3263,8 +3352,9 @@ static void request_ping(REQUEST *request, int action)
 
        switch (action) {
        case FR_ACTION_TIMER:
-               ERROR("No response to status check %d for home server %s port %d",
+               ERROR("No response to status check %d ID %u for home server %s port %d",
                       request->number,
+                      request->proxy->id,
                       inet_ntop(request->proxy->dst_ipaddr.af,
                                 &request->proxy->dst_ipaddr.ipaddr,
                                 buffer, sizeof(buffer)),
@@ -3275,8 +3365,8 @@ static void request_ping(REQUEST *request, int action)
                rad_assert(request->in_proxy_hash);
 
                request->home_server->num_received_pings++;
-               RPROXY("Received response to status check %d (%d in current sequence)",
-                      request->number, home->num_received_pings);
+               RPROXY("Received response to status check %d ID %u (%d in current sequence)",
+                      request->number, request->proxy->id, home->num_received_pings);
 
                /*
                 *      Remove the request from any hashes
@@ -3307,21 +3397,7 @@ static void request_ping(REQUEST *request, int action)
                 *      Mark it alive and delete any outstanding
                 *      pings.
                 */
-               home->state = HOME_STATE_ALIVE;
-               home->response_timeouts = 0;
-               exec_trigger(request, home->cs, "home_server.alive", false);
-               home->currently_outstanding = 0;
-               home->num_sent_pings = 0;
-               home->num_received_pings = 0;
-               gettimeofday(&home->revive_time, NULL);
-
-               fr_event_delete(el, &home->ev);
-
-               RPROXY("Marking home server %s port %d alive",
-                      inet_ntop(request->proxy->dst_ipaddr.af,
-                                &request->proxy->dst_ipaddr.ipaddr,
-                                buffer, sizeof(buffer)),
-                      request->proxy->dst_port);
+               mark_home_server_alive(request, home);
                break;
 
        default:
@@ -3376,8 +3452,8 @@ static void ping_home_server(void *ctx)
         */
        if (home->ping_check == HOME_PING_CHECK_NONE) {
                if (home->state == HOME_STATE_ZOMBIE) {
-                       when = home->zombie_period_start;
-                       when.tv_sec += home->zombie_period;
+                       home->when = home->zombie_period_start;
+                       home->when.tv_sec += home->zombie_period;
                        INSERT_EVENT(ping_home_server, home);
                }
 
@@ -3400,32 +3476,32 @@ static void ping_home_server(void *ctx)
        if (home->ping_check == HOME_PING_CHECK_STATUS_SERVER) {
                request->proxy->code = PW_CODE_STATUS_SERVER;
 
-               pairmake(request->proxy, &request->proxy->vps,
+               fr_pair_make(request->proxy, &request->proxy->vps,
                         "Message-Authenticator", "0x00", T_OP_SET);
 
        } else if (home->type == HOME_TYPE_AUTH) {
                request->proxy->code = PW_CODE_ACCESS_REQUEST;
 
-               pairmake(request->proxy, &request->proxy->vps,
+               fr_pair_make(request->proxy, &request->proxy->vps,
                         "User-Name", home->ping_user_name, T_OP_SET);
-               pairmake(request->proxy, &request->proxy->vps,
+               fr_pair_make(request->proxy, &request->proxy->vps,
                         "User-Password", home->ping_user_password, T_OP_SET);
-               pairmake(request->proxy, &request->proxy->vps,
+               fr_pair_make(request->proxy, &request->proxy->vps,
                         "Service-Type", "Authenticate-Only", T_OP_SET);
-               pairmake(request->proxy, &request->proxy->vps,
+               fr_pair_make(request->proxy, &request->proxy->vps,
                         "Message-Authenticator", "0x00", T_OP_SET);
 
        } else {
 #ifdef WITH_ACCOUNTING
                request->proxy->code = PW_CODE_ACCOUNTING_REQUEST;
 
-               pairmake(request->proxy, &request->proxy->vps,
+               fr_pair_make(request->proxy, &request->proxy->vps,
                         "User-Name", home->ping_user_name, T_OP_SET);
-               pairmake(request->proxy, &request->proxy->vps,
+               fr_pair_make(request->proxy, &request->proxy->vps,
                         "Acct-Status-Type", "Stop", T_OP_SET);
-               pairmake(request->proxy, &request->proxy->vps,
+               fr_pair_make(request->proxy, &request->proxy->vps,
                         "Acct-Session-Id", "00000000", T_OP_SET);
-               vp = pairmake(request->proxy, &request->proxy->vps,
+               vp = fr_pair_make(request->proxy, &request->proxy->vps,
                              "Event-Timestamp", "0", T_OP_SET);
                vp->vp_date = now.tv_sec;
 #else
@@ -3433,22 +3509,25 @@ static void ping_home_server(void *ctx)
 #endif
        }
 
-       vp = pairmake(request->proxy, &request->proxy->vps,
+       vp = fr_pair_make(request->proxy, &request->proxy->vps,
                      "NAS-Identifier", "", T_OP_SET);
        if (vp) {
-               pairsprintf(vp, "Status Check %u. Are you alive?",
+               fr_pair_value_sprintf(vp, "Status Check %u. Are you alive?",
                            home->num_sent_pings);
        }
 
+#ifdef WITH_TCP
+       request->proxy->proto = home->proto;
+#endif
        request->proxy->src_ipaddr = home->src_ipaddr;
        request->proxy->dst_ipaddr = home->ipaddr;
        request->proxy->dst_port = home->port;
        request->home_server = home;
 #ifdef DEBUG_STATE_MACHINE
-       if (debug_flag) printf("(%u) ********\tSTATE %s C-%s -> C-%s\t********\n", request->number, __FUNCTION__,
+       if (rad_debug_lvl) printf("(%u) ********\tSTATE %s C-%s -> C-%s\t********\n", request->number, __FUNCTION__,
                               child_state_names[request->child_state],
                               child_state_names[REQUEST_DONE]);
-       if (debug_flag) printf("(%u) ********\tNEXT-STATE %s -> %s\n", request->number, __FUNCTION__, "request_ping");
+       if (rad_debug_lvl) printf("(%u) ********\tNEXT-STATE %s -> %s\n", request->number, __FUNCTION__, "request_ping");
 #endif
 #ifdef HAVE_PTHREAD_H
        rad_assert(request->child_pid == NO_SUCH_CHILD_PID);
@@ -3482,6 +3561,7 @@ static void ping_home_server(void *ctx)
        home->num_sent_pings++;
 
        rad_assert(request->proxy_listener != NULL);
+       debug_packet(request, request->proxy, false);
        request->proxy_listener->send(request->proxy_listener,
                                      request);
 
@@ -3708,6 +3788,11 @@ static void proxy_wait_for_reply(REQUEST *request, int action)
                }
 
 #ifdef WITH_TCP
+               /*
+                *      The home server is still alive, but TCP.  We
+                *      rely on TCP to get the request and reply back.
+                *      So there's no need to retransmit.
+                */
                if (home->proto == IPPROTO_TCP) {
                        DEBUG2("Suppressing duplicate proxied request (tcp) to home server %s port %d proto TCP - ID: %d",
                               inet_ntop(request->proxy->dst_ipaddr.af,
@@ -3742,7 +3827,7 @@ static void proxy_wait_for_reply(REQUEST *request, int action)
                 *      get a new ID.
                 */
                if ((request->packet->code == PW_CODE_ACCOUNTING_REQUEST) &&
-                   pairfind(request->proxy->vps, PW_ACCT_DELAY_TIME, 0, TAG_ANY)) {
+                   fr_pair_find_by_num(request->proxy->vps, PW_ACCT_DELAY_TIME, 0, TAG_ANY)) {
                        request_proxy_anew(request);
                        return;
                }
@@ -3760,8 +3845,8 @@ static void proxy_wait_for_reply(REQUEST *request, int action)
                FR_STATS_TYPE_INC(home->stats.total_requests);
                home->last_packet_sent = now.tv_sec;
                request->proxy_retransmit = now;
-               request->proxy_listener->send(request->proxy_listener, request);
                debug_packet(request, request->proxy, false);
+               request->proxy_listener->send(request->proxy_listener, request);
                break;
 
        case FR_ACTION_TIMER:
@@ -3928,9 +4013,9 @@ static void request_coa_originate(REQUEST *request)
        /*
         *      Check whether we want to originate one, or cancel one.
         */
-       vp = pairfind(request->config, PW_SEND_COA_REQUEST, 0, TAG_ANY);
+       vp = fr_pair_find_by_num(request->config, PW_SEND_COA_REQUEST, 0, TAG_ANY);
        if (!vp) {
-               vp = pairfind(request->coa->proxy->vps, PW_SEND_COA_REQUEST, 0, TAG_ANY);
+               vp = fr_pair_find_by_num(request->coa->proxy->vps, PW_SEND_COA_REQUEST, 0, TAG_ANY);
        }
 
        if (vp) {
@@ -3947,16 +4032,16 @@ static void request_coa_originate(REQUEST *request)
         *      src_ipaddr will be set up in proxy_encode.
         */
        memset(&ipaddr, 0, sizeof(ipaddr));
-       vp = pairfind(coa->proxy->vps, PW_PACKET_DST_IP_ADDRESS, 0, TAG_ANY);
+       vp = fr_pair_find_by_num(coa->proxy->vps, PW_PACKET_DST_IP_ADDRESS, 0, TAG_ANY);
        if (vp) {
                ipaddr.af = AF_INET;
                ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
                ipaddr.prefix = 32;
-       } else if ((vp = pairfind(coa->proxy->vps, PW_PACKET_DST_IPV6_ADDRESS, 0, TAG_ANY)) != NULL) {
+       } else if ((vp = fr_pair_find_by_num(coa->proxy->vps, PW_PACKET_DST_IPV6_ADDRESS, 0, TAG_ANY)) != NULL) {
                ipaddr.af = AF_INET6;
                ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
                ipaddr.prefix = 128;
-       } else if ((vp = pairfind(coa->proxy->vps, PW_HOME_SERVER_POOL, 0, TAG_ANY)) != NULL) {
+       } else if ((vp = fr_pair_find_by_num(coa->proxy->vps, PW_HOME_SERVER_POOL, 0, TAG_ANY)) != NULL) {
                coa->home_pool = home_pool_byname(vp->vp_strvalue,
                                                  HOME_TYPE_COA);
                if (!coa->home_pool) {
@@ -3996,7 +4081,7 @@ static void request_coa_originate(REQUEST *request)
        } else if (!coa->home_server) {
                uint16_t port = PW_COA_UDP_PORT;
 
-               vp = pairfind(coa->proxy->vps, PW_PACKET_DST_PORT, 0, TAG_ANY);
+               vp = fr_pair_find_by_num(coa->proxy->vps, PW_PACKET_DST_PORT, 0, TAG_ANY);
                if (vp) port = vp->vp_integer;
 
                coa->home_server = home_server_find(&ipaddr, port, IPPROTO_UDP);
@@ -4008,7 +4093,7 @@ static void request_coa_originate(REQUEST *request)
                }
        }
 
-       vp = pairfind(coa->proxy->vps, PW_PACKET_TYPE, 0, TAG_ANY);
+       vp = fr_pair_find_by_num(coa->proxy->vps, PW_PACKET_TYPE, 0, TAG_ANY);
        if (vp) {
                switch (vp->vp_integer) {
                case PW_CODE_COA_REQUEST:
@@ -4036,7 +4121,7 @@ static void request_coa_originate(REQUEST *request)
        coa->packet = rad_copy_packet(coa, request->packet);
        coa->reply = rad_copy_packet(coa, request->reply);
 
-       coa->config = paircopy(coa, request->config);
+       coa->config = fr_pair_list_copy(coa, request->config);
        coa->num_coa_requests = 0;
        coa->handle = null_handler;
        coa->number = request->number; /* it's associated with the same request */
@@ -4044,7 +4129,7 @@ static void request_coa_originate(REQUEST *request)
        /*
         *      Call the pre-proxy routines.
         */
-       vp = pairfind(request->config, PW_PRE_PROXY_TYPE, 0, TAG_ANY);
+       vp = fr_pair_find_by_num(request->config, PW_PRE_PROXY_TYPE, 0, TAG_ANY);
        if (vp) {
                DICT_VALUE const *dval = dict_valbyattr(vp->da->attr, vp->da->vendor, vp->vp_integer);
                /* Must be a validation issue */
@@ -4118,7 +4203,7 @@ static void request_coa_originate(REQUEST *request)
        debug_packet(coa, coa->proxy, false);
 
 #ifdef DEBUG_STATE_MACHINE
-       if (debug_flag) printf("(%u) ********\tSTATE %s C-%s -> C-%s\t********\n", request->number, __FUNCTION__,
+       if (rad_debug_lvl) printf("(%u) ********\tSTATE %s C-%s -> C-%s\t********\n", request->number, __FUNCTION__,
                               child_state_names[request->child_state],
                               child_state_names[REQUEST_PROXIED]);
 #endif
@@ -4134,6 +4219,8 @@ static void request_coa_originate(REQUEST *request)
        coa->child_pid = NO_SUCH_CHILD_PID;
 #endif
 
+       if (we_are_master()) coa_separate(request->coa);
+
        /*
         *      And send the packet.
         */
@@ -4145,15 +4232,12 @@ static void coa_retransmit(REQUEST *request)
 {
        uint32_t delay, frac;
        struct timeval now, when, mrd;
+       char buffer[128];
 
        VERIFY_REQUEST(request);
 
        fr_event_now(el, &now);
 
-       /*
-        *      FIXME: Enforce max_request_time
-        */
-
        if (request->delay == 0) {
                /*
                 *      Implement re-transmit algorithm as per RFC 5080
@@ -4190,8 +4274,6 @@ static void coa_retransmit(REQUEST *request)
         */
        if (request->home_server->coa_mrc &&
            (request->num_coa_requests >= request->home_server->coa_mrc)) {
-               char buffer[128];
-
                RERROR("Failing request - originate-coa ID %u, due to lack of any response from coa server %s port %d",
                       request->proxy->id,
                               inet_ntop(request->proxy->dst_ipaddr.af,
@@ -4258,6 +4340,13 @@ static void coa_retransmit(REQUEST *request)
 
        FR_STATS_TYPE_INC(request->home_server->stats.total_requests);
 
+       RDEBUG2("Sending duplicate CoA request to home server %s port %d - ID: %d",
+               inet_ntop(request->proxy->dst_ipaddr.af,
+                         &request->proxy->dst_ipaddr.ipaddr,
+                         buffer, sizeof(buffer)),
+               request->proxy->dst_port,
+               request->proxy->id);
+
        request->proxy_listener->send(request->proxy_listener,
                                      request);
 }
@@ -4289,16 +4378,16 @@ static void coa_wait_for_reply(REQUEST *request, int action)
        ASSERT_MASTER;
        CHECK_FOR_STOP;
 
+       if (request->parent) coa_separate(request);
+
        switch (action) {
        case FR_ACTION_TIMER:
-               if (request->parent) coa_separate(request);
+               if (request_max_time(request)) break;
 
                coa_retransmit(request);
                break;
 
        case FR_ACTION_PROXY_REPLY:
-               if (request->parent) coa_separate(request);
-
                request_queue_or_run(request, coa_running);
                break;
 
@@ -4329,6 +4418,11 @@ static void coa_separate(REQUEST *request)
        (void) talloc_steal(NULL, request);
        request->parent->coa = NULL;
        request->parent = NULL;
+
+       if (we_are_master()) {
+               request->delay = 0;
+               coa_retransmit(request);
+       }
 }
 
 
@@ -4359,7 +4453,7 @@ static void coa_no_reply(REQUEST *request, int action)
 
        switch (action) {
        case FR_ACTION_TIMER:
-               request_max_time(request);
+               (void) request_max_time(request);
                break;
 
        case FR_ACTION_PROXY_REPLY: /* too late! */
@@ -4408,7 +4502,7 @@ static void coa_running(REQUEST *request, int action)
 
        switch (action) {
        case FR_ACTION_TIMER:
-               request_max_time(request);
+               (void) request_max_time(request);
                break;
 
        case FR_ACTION_RUN:
@@ -4509,7 +4603,7 @@ static void event_status(struct timeval *wake)
        int argval;
 #endif
 
-       if (debug_flag == 0) {
+       if (rad_debug_lvl == 0) {
                if (just_started) {
                        INFO("Ready to process requests");
                        just_started = false;
@@ -4635,11 +4729,14 @@ static int event_new_fd(rad_listen_t *this)
                rad_assert(sock != NULL);
                if (just_started) {
                        DEBUG("Listening on %s", buffer);
+               } else {
+                       INFO(" ... adding new socket %s", buffer);
+               }
 
 #ifdef WITH_PROXY
-               } else if (this->type == RAD_LISTEN_PROXY) {
+               if (!just_started && (this->type == RAD_LISTEN_PROXY)) {
                        home_server_t *home;
-
+                       
                        home = sock->home;
                        if (!home || !home->limit.max_connections) {
                                INFO(" ... adding new socket %s", buffer);
@@ -4649,8 +4746,6 @@ static int event_new_fd(rad_listen_t *this)
                        }
 
 #endif
-               } else {
-                       INFO(" ... adding new socket %s", buffer);
                }
 
                switch (this->type) {
@@ -5120,6 +5215,119 @@ static int packet_entry_cmp(void const *one, void const *two)
        return fr_packet_cmp(*a, *b);
 }
 
+#ifdef WITH_PROXY
+/*
+ *     They haven't defined a proxy listener.  Automatically
+ *     add one for them, with the correct address family.
+ */
+static void create_default_proxy_listener(int af)
+{
+       uint16_t        port = 0;
+       home_server_t   home;
+       listen_socket_t *sock;
+       rad_listen_t    *this;
+
+       memset(&home, 0, sizeof(home));
+
+       /*
+        *      Open a default UDP port
+        */
+       home.proto = IPPROTO_UDP;
+       port = 0;
+
+       /*
+        *      Set the address family.
+        */
+       home.src_ipaddr.af = af;
+       home.ipaddr.af = af;
+
+       /*
+        *      Get the correct listener.
+        */
+       this = proxy_new_listener(proxy_ctx, &home, port);
+       if (!this) {
+               fr_exit_now(1);
+       }
+
+       sock = this->data;
+       if (!fr_packet_list_socket_add(proxy_list, this->fd,
+                                      sock->proto,
+                                      &sock->other_ipaddr, sock->other_port,
+                                      this)) {
+               ERROR("Failed adding proxy socket");
+               fr_exit_now(1);
+       }
+
+       /*
+        *      Insert the FD into list of FDs to listen on.
+        */
+       radius_update_listener(this);
+}
+
+/*
+ *     See if we automatically need to open a proxy socket.
+ */
+static void check_proxy(rad_listen_t *head)
+{
+       bool            defined_proxy;
+       bool            has_v4, has_v6;
+       rad_listen_t    *this;
+
+       if (check_config) return;
+       if (!main_config.proxy_requests) return;
+       if (!head) return;
+       if (!home_servers_udp) return;
+
+       /*
+        *      We passed "-i" on the command line.  Use that address
+        *      family for the proxy socket.
+        */
+       if (main_config.myip.af != AF_UNSPEC) {
+               create_default_proxy_listener(main_config.myip.af);
+               return;
+       }
+
+       defined_proxy = has_v4 = has_v6 = false;
+
+       /*
+        *      Figure out if we need to open a proxy socket, and if
+        *      so, which one.
+        */
+       for (this = head; this != NULL; this = this->next) {
+               listen_socket_t *sock;
+
+               switch (this->type) {
+               case RAD_LISTEN_PROXY:
+                       defined_proxy = true;
+                       break;
+
+               case RAD_LISTEN_AUTH:
+#ifdef WITH_ACCT
+               case RAD_LISTEN_ACCT:
+#endif
+#ifdef WITH_COA
+               case RAD_LISTEN_COA:
+#endif
+                       sock = this->data;
+                       if (sock->my_ipaddr.af == AF_INET) has_v4 = true;
+                       if (sock->my_ipaddr.af == AF_INET6) has_v6 = true;
+                       break;
+                       
+               default:
+                       break;
+               }
+       }
+
+       /*
+        *      Assume they know what they're doing.
+        */
+       if (defined_proxy) return;
+
+       if (has_v4) create_default_proxy_listener(AF_INET);
+
+       if (has_v6) create_default_proxy_listener(AF_INET6);
+}
+#endif
 
 int radius_event_start(CONF_SECTION *cs, bool have_children)
 {
@@ -5246,10 +5454,14 @@ int radius_event_start(CONF_SECTION *cs, bool have_children)
 
        main_config.listen = head;
 
+#ifdef WITH_PROXY
+       check_proxy(head);
+#endif
+
        /*
-             At this point, no one has any business *ever* going
-             back to root uid.
-       */
+        *      At this point, no one has any business *ever* going
+        *      back to root uid.
+        */
        rad_suid_down_permanent();
 
        return 1;