talloc_steal the packet after reading it
[freeradius.git] / src / main / listen.c
index 9e67171..339e1e6 100644 (file)
@@ -28,6 +28,7 @@ RCSID("$Id$")
 #include <freeradius-devel/rad_assert.h>
 #include <freeradius-devel/process.h>
 #include <freeradius-devel/protocol.h>
+#include <freeradius-devel/modpriv.h>
 
 #include <freeradius-devel/detail.h>
 
@@ -85,7 +86,7 @@ static ssize_t xlat_listen(UNUSED void *instance, REQUEST *request,
 
        if (!fmt || !out || (outlen < 1)) return 0;
 
-       if (!request || !request->listener) {
+       if (!request->listener) {
                RWDEBUG("No listener associated with this request");
                *out = '\0';
                return 0;
@@ -107,7 +108,7 @@ static ssize_t xlat_listen(UNUSED void *instance, REQUEST *request,
  *     Find a per-socket client.
  */
 RADCLIENT *client_listener_find(rad_listen_t *listener,
-                               fr_ipaddr_t const *ipaddr, int src_port)
+                               fr_ipaddr_t const *ipaddr, uint16_t src_port)
 {
 #ifdef WITH_DYNAMIC_CLIENTS
        int rcode;
@@ -243,19 +244,20 @@ RADCLIENT *client_listener_find(rad_listen_t *listener,
        request->client = client;
        request->packet = rad_recv(listener->fd, 0x02); /* MSG_PEEK */
        if (!request->packet) {                         /* badly formed, etc */
-               request_free(&request);
+               talloc_free(request);
                goto unknown;
        }
+       (void) talloc_steal(request, request->packet);
        request->reply = rad_alloc_reply(request, request->packet);
        if (!request->reply) {
-               request_free(&request);
+               talloc_free(request);
                goto unknown;
        }
        gettimeofday(&request->packet->timestamp, NULL);
        request->number = 0;
        request->priority = listener->type;
        request->server = client->client_server;
-       request->root = &mainconfig;
+       request->root = &main_config;
 
        /*
         *      Run a fake request through the given virtual server.
@@ -272,7 +274,7 @@ RADCLIENT *client_listener_find(rad_listen_t *listener,
        DEBUG("} # server %s", request->server);
 
        if (rcode != RLM_MODULE_OK) {
-               request_free(&request);
+               talloc_free(request);
                goto unknown;
        }
 
@@ -294,7 +296,7 @@ RADCLIENT *client_listener_find(rad_listen_t *listener,
        request->server = client->server;
        exec_trigger(request, NULL, "server.client.add", false);
 
-       request_free(&request);
+       talloc_free(request);
 
        if (!created) goto unknown;
 
@@ -330,7 +332,7 @@ int rad_status_server(REQUEST *request)
                switch (rcode) {
                case RLM_MODULE_OK:
                case RLM_MODULE_UPDATED:
-                       request->reply->code = PW_AUTHENTICATION_ACK;
+                       request->reply->code = PW_CODE_ACCESS_ACCEPT;
                        break;
 
                case RLM_MODULE_FAIL:
@@ -340,7 +342,7 @@ int rad_status_server(REQUEST *request)
 
                default:
                case RLM_MODULE_REJECT:
-                       request->reply->code = PW_AUTHENTICATION_REJECT;
+                       request->reply->code = PW_CODE_ACCESS_REJECT;
                        break;
                }
                break;
@@ -357,7 +359,7 @@ int rad_status_server(REQUEST *request)
                switch (rcode) {
                case RLM_MODULE_OK:
                case RLM_MODULE_UPDATED:
-                       request->reply->code = PW_ACCOUNTING_RESPONSE;
+                       request->reply->code = PW_CODE_ACCOUNTING_RESPONSE;
                        break;
 
                default:
@@ -384,7 +386,7 @@ int rad_status_server(REQUEST *request)
                switch (rcode) {
                case RLM_MODULE_OK:
                case RLM_MODULE_UPDATED:
-                       request->reply->code = PW_COA_ACK;
+                       request->reply->code = PW_CODE_COA_ACK;
                        break;
 
                default:
@@ -420,11 +422,15 @@ static int dual_tcp_recv(rad_listen_t *listener)
        listen_socket_t *sock = listener->data;
        RADCLIENT       *client = sock->client;
 
+       rad_assert(client != NULL);
+
+       if (listener->status != RAD_LISTEN_STATUS_KNOWN) return 0;
+
        /*
         *      Allocate a packet for partial reads.
         */
        if (!sock->packet) {
-               sock->packet = rad_alloc(sock, 0);
+               sock->packet = rad_alloc(sock, false);
                if (!sock->packet) return 0;
 
                sock->packet->sockfd = listener->fd;
@@ -432,6 +438,7 @@ static int dual_tcp_recv(rad_listen_t *listener)
                sock->packet->src_port = sock->other_port;
                sock->packet->dst_ipaddr = sock->my_ipaddr;
                sock->packet->dst_port = sock->my_port;
+               sock->packet->proto = sock->proto;
        }
 
        /*
@@ -452,19 +459,19 @@ static int dual_tcp_recv(rad_listen_t *listener)
        if (rcode == -1) {      /* error reading packet */
                char buffer[256];
 
-               ERROR("Invalid packet from %s port %d: closing socket",
+               ERROR("Invalid packet from %s port %d, closing socket: %s",
                       ip_ntoh(&packet->src_ipaddr, buffer, sizeof(buffer)),
-                      packet->src_port);
+                      packet->src_port, fr_strerror());
        }
 
        if (rcode < 0) {        /* error or connection reset */
-               listener->status = RAD_LISTEN_STATUS_REMOVE_NOW;
+               listener->status = RAD_LISTEN_STATUS_EOL;
 
                /*
                 *      Tell the event handler that an FD has disappeared.
                 */
                DEBUG("Client has closed connection");
-               event_new_fd(listener);
+               radius_update_listener(listener);
 
                /*
                 *      Do NOT free the listener here.  It's in use by
@@ -480,24 +487,24 @@ static int dual_tcp_recv(rad_listen_t *listener)
         *      Some sanity checks, based on the packet code.
         */
        switch(packet->code) {
-       case PW_AUTHENTICATION_REQUEST:
+       case PW_CODE_ACCESS_REQUEST:
                if (listener->type != RAD_LISTEN_AUTH) goto bad_packet;
                FR_STATS_INC(auth, total_requests);
                fun = rad_authenticate;
                break;
 
 #ifdef WITH_ACCOUNTING
-       case PW_ACCOUNTING_REQUEST:
+       case PW_CODE_ACCOUNTING_REQUEST:
                if (listener->type != RAD_LISTEN_ACCT) goto bad_packet;
                FR_STATS_INC(acct, total_requests);
                fun = rad_accounting;
                break;
 #endif
 
-       case PW_STATUS_SERVER:
-               if (!mainconfig.status_server) {
+       case PW_CODE_STATUS_SERVER:
+               if (!main_config.status_server) {
                        FR_STATS_INC(auth, total_unknown_types);
-                       WDEBUG("Ignoring Status-Server request due to security configuration");
+                       WARN("Ignoring Status-Server request due to security configuration");
                        rad_free(&sock->packet);
                        return 0;
                }
@@ -526,7 +533,8 @@ static int dual_tcp_recv(rad_listen_t *listener)
 
 static int dual_tcp_accept(rad_listen_t *listener)
 {
-       int newfd, src_port;
+       int newfd;
+       uint16_t src_port;
        rad_listen_t *this;
        socklen_t salen;
        struct sockaddr_storage src;
@@ -536,7 +544,7 @@ static int dual_tcp_accept(rad_listen_t *listener)
 
        salen = sizeof(src);
 
-       DEBUG2(" ... new connection request on TCP socket.");
+       DEBUG2(" ... new connection request on TCP socket");
 
        newfd = accept(listener->fd, (struct sockaddr *) &src, &salen);
        if (newfd < 0) {
@@ -549,13 +557,13 @@ static int dual_tcp_accept(rad_listen_t *listener)
                }
 #endif
 
-               DEBUG2(" ... failed to accept connection.");
+               DEBUG2(" ... failed to accept connection");
                return -1;
        }
 
        if (!fr_sockaddr2ipaddr(&src, salen, &src_ipaddr, &src_port)) {
                close(newfd);
-               DEBUG2(" ... unknown address family.");
+               DEBUG2(" ... unknown address family");
                return 0;
        }
 
@@ -686,7 +694,7 @@ static int dual_tcp_accept(rad_listen_t *listener)
         *      Tell the event loop that we have a new FD.
         *      This can be called from a child thread...
         */
-       event_new_fd(this);
+       radius_update_listener(this);
 
        return 0;
 }
@@ -695,24 +703,25 @@ static int dual_tcp_accept(rad_listen_t *listener)
 /*
  *     Ensure that we always keep the correct counters.
  */
-#ifdef WITH_TLS
+#ifdef WITH_TCP
 static void common_socket_free(rad_listen_t *this)
 {
        listen_socket_t *sock = this->data;
 
        if (sock->proto != IPPROTO_TCP) return;
 
-       if (!sock->parent) return;
-
        /*
         *      Decrement the number of connections.
         */
-       if (sock->parent->limit.num_connections > 0) {
+       if (sock->parent && (sock->parent->limit.num_connections > 0)) {
                sock->parent->limit.num_connections--;
        }
-       if (sock->client->limit.num_connections > 0) {
+       if (sock->client && sock->client->limit.num_connections > 0) {
                sock->client->limit.num_connections--;
        }
+       if (sock->home && sock->home->limit.num_connections > 0) {
+               sock->home->limit.num_connections--;
+       }
 }
 #else
 static void common_socket_free(UNUSED rad_listen_t *this)
@@ -856,32 +865,23 @@ int common_socket_print(rad_listen_t const *this, char *buffer, size_t bufsize)
 extern bool check_config;      /* radiusd.c */
 
 static CONF_PARSER performance_config[] = {
-       { "skip_duplicate_checks", PW_TYPE_BOOLEAN,
-         offsetof(rad_listen_t, nodup), NULL,   NULL },
+       { "skip_duplicate_checks", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, rad_listen_t, nodup), NULL },
 
-       { "synchronous", PW_TYPE_BOOLEAN,
-         offsetof(rad_listen_t, synchronous), NULL,   NULL },
+       { "synchronous", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, rad_listen_t, synchronous), NULL },
 
-       { "workers", PW_TYPE_INTEGER,
-         offsetof(rad_listen_t, workers), NULL,   NULL },
+       { "workers", FR_CONF_OFFSET(PW_TYPE_INTEGER, rad_listen_t, workers), NULL },
 
        { NULL, -1, 0, NULL, NULL }             /* end the list */
 };
 
 
 static CONF_PARSER limit_config[] = {
-       { "max_pps", PW_TYPE_INTEGER,
-         offsetof(listen_socket_t, max_rate), NULL,   NULL },
+       { "max_pps", FR_CONF_OFFSET(PW_TYPE_INTEGER, listen_socket_t, max_rate), NULL },
 
 #ifdef WITH_TCP
-       { "max_connections", PW_TYPE_INTEGER,
-         offsetof(listen_socket_t, limit.max_connections), NULL,   "16" },
-
-       { "lifetime", PW_TYPE_INTEGER,
-         offsetof(listen_socket_t, limit.lifetime), NULL,   "0" },
-
-       { "idle_timeout", PW_TYPE_INTEGER,
-         offsetof(listen_socket_t, limit.idle_timeout), NULL,   "30" },
+       { "max_connections", FR_CONF_OFFSET(PW_TYPE_INTEGER, listen_socket_t, limit.max_connections), "16" },
+       { "lifetime", FR_CONF_OFFSET(PW_TYPE_INTEGER, listen_socket_t, limit.lifetime), "0" },
+       { "idle_timeout", FR_CONF_OFFSET(PW_TYPE_INTEGER, listen_socket_t, limit.idle_timeout), STRINGIFY(30) },
 #endif
 
        { NULL, -1, 0, NULL, NULL }             /* end the list */
@@ -893,10 +893,10 @@ static CONF_PARSER limit_config[] = {
 int common_socket_parse(CONF_SECTION *cs, rad_listen_t *this)
 {
        int             rcode;
-       int             listen_port;
+       uint16_t        listen_port;
        fr_ipaddr_t     ipaddr;
        listen_socket_t *sock = this->data;
-       char            *section_name = NULL;
+       char const      *section_name = NULL;
        CONF_SECTION    *client_cs, *parentcs;
        CONF_SECTION    *subcs;
 
@@ -907,51 +907,35 @@ int common_socket_parse(CONF_SECTION *cs, rad_listen_t *this)
         */
        memset(&ipaddr, 0, sizeof(ipaddr));
        ipaddr.ipaddr.ip4addr.s_addr = htonl(INADDR_NONE);
-       rcode = cf_item_parse(cs, "ipaddr", PW_TYPE_IPADDR,
-                             &ipaddr.ipaddr.ip4addr, NULL);
-       if (rcode < 0) return -1;
-
-       if (rcode == 0) { /* successfully parsed IPv4 */
-               ipaddr.af = AF_INET;
 
-       } else {        /* maybe IPv6? */
-               rcode = cf_item_parse(cs, "ipv6addr", PW_TYPE_IPV6ADDR,
-                                     &ipaddr.ipaddr.ip6addr, NULL);
-               if (rcode < 0) return -1;
-
-               if (rcode == 1) {
-                       cf_log_err_cs(cs,
-                                  "No address specified in listen section");
-                       return -1;
-               }
-               ipaddr.af = AF_INET6;
+       rcode = cf_item_parse(cs, "ipaddr", FR_ITEM_POINTER(PW_TYPE_IP_ADDR, &ipaddr), NULL);
+       if (rcode < 0) return -1;
+       if (rcode != 0) rcode = cf_item_parse(cs, "ipv4addr", FR_ITEM_POINTER(PW_TYPE_IPV4_ADDR, &ipaddr), NULL);
+       if (rcode < 0) return -1;
+       if (rcode != 0) rcode = cf_item_parse(cs, "ipv6addr", FR_ITEM_POINTER(PW_TYPE_IPV6_ADDR, &ipaddr), NULL);
+       if (rcode < 0) return -1;
+       if (rcode != 0) {
+               cf_log_err_cs(cs, "No address specified in listen section");
+               return -1;
        }
 
-       rcode = cf_item_parse(cs, "port", PW_TYPE_INTEGER,
-                             &listen_port, "0");
+       rcode = cf_item_parse(cs, "port", FR_ITEM_POINTER(PW_TYPE_SHORT, &listen_port), "0");
        if (rcode < 0) return -1;
 
-       if ((listen_port < 0) || (listen_port > 65535)) {
-                       cf_log_err_cs(cs,
-                                  "Invalid value for \"port\"");
-                       return -1;
-       }
-
        sock->proto = IPPROTO_UDP;
 
        if (cf_pair_find(cs, "proto")) {
 #ifndef WITH_TCP
                cf_log_err_cs(cs,
-                          "System does not support the TCP protocol.  Delete this line from the configuration file.");
+                          "System does not support the TCP protocol.  Delete this line from the configuration file");
                return -1;
 #else
-               char *proto = NULL;
+               char const *proto = NULL;
 #ifdef WITH_TLS
                CONF_SECTION *tls;
 #endif
 
-               rcode = cf_item_parse(cs, "proto", PW_TYPE_STRING_PTR,
-                                     &proto, "udp");
+               rcode = cf_item_parse(cs, "proto", FR_ITEM_POINTER(PW_TYPE_STRING, &proto), "udp");
                if (rcode < 0) return -1;
 
                if (strcmp(proto, "udp") == 0) {
@@ -981,20 +965,20 @@ int common_socket_parse(CONF_SECTION *cs, rad_listen_t *this)
 #ifdef WITH_TLS
                tls = cf_section_sub_find(cs, "tls");
 
-               /*
-                *      Don't allow TLS configurations for UDP sockets.
-                */
-               if (sock->proto != IPPROTO_TCP) {
-                       cf_log_err_cs(cs,
-                                  "TLS transport is not available for UDP sockets.");
-                       return -1;
-               }
-
                if (tls) {
                        /*
-                        *      FIXME: Make this better.
+                        *      Don't allow TLS configurations for UDP sockets.
                         */
-                       if (listen_port == 0) listen_port = 2083;
+                       if (sock->proto != IPPROTO_TCP) {
+                               cf_log_err_cs(cs,
+                                             "TLS transport is not available for UDP sockets");
+                               return -1;
+                       }
+
+                       /*
+                        *      If unset, set to default.
+                        */
+                       if (listen_port == 0) listen_port = PW_RADIUS_TLS_PORT;
 
                        this->tls = tls_server_conf_parse(tls);
                        if (!this->tls) {
@@ -1016,7 +1000,7 @@ int common_socket_parse(CONF_SECTION *cs, rad_listen_t *this)
                 */
                if (cf_section_sub_find(cs, "tls")) {
                        cf_log_err_cs(cs,
-                                  "TLS transport is not available in this executable.");
+                                  "TLS transport is not available in this executable");
                        return -1;
                }
 #endif /* WITH_TLS */
@@ -1028,7 +1012,7 @@ int common_socket_parse(CONF_SECTION *cs, rad_listen_t *this)
                 */
        } else if (cf_section_sub_find(cs, "tls")) {
                cf_log_err_cs(cs,
-                          "TLS transport is not available in this \"listen\" section.");
+                          "TLS transport is not available in this \"listen\" section");
                return -1;
        }
 
@@ -1099,15 +1083,21 @@ int common_socket_parse(CONF_SECTION *cs, rad_listen_t *this)
 
 #ifdef WITH_PROXY
        if (check_config) {
+               /*
+                *      Until there is a side effects free way of forwarding a
+                *      request to another virtual server, this check is invalid,
+                *      and should be left disabled.
+                */
+#if 0
                if (home_server_find(&sock->my_ipaddr, sock->my_port, sock->proto)) {
                                char buffer[128];
 
-                               EDEBUG("We have been asked to listen on %s port %d, which is also listed as a home server.  This can create a proxy loop.",
-                                     ip_ntoh(&sock->my_ipaddr, buffer, sizeof(buffer)),
-                                     sock->my_port);
+                               ERROR("We have been asked to listen on %s port %d, which is also listed as a "
+                                      "home server.  This can create a proxy loop",
+                                      ip_ntoh(&sock->my_ipaddr, buffer, sizeof(buffer)), sock->my_port);
                                return -1;
                }
-
+#endif
                return 0;       /* don't do anything */
        }
 #endif
@@ -1137,7 +1127,7 @@ int common_socket_parse(CONF_SECTION *cs, rad_listen_t *this)
        if (cf_pair_find(cs, "broadcast")) {
 #ifndef SO_BROADCAST
                cf_log_err_cs(cs,
-                          "System does not support broadcast sockets.  Delete this line from the configuration file.");
+                          "System does not support broadcast sockets.  Delete this line from the configuration file");
                return -1;
 #else
                char const *value;
@@ -1145,7 +1135,7 @@ int common_socket_parse(CONF_SECTION *cs, rad_listen_t *this)
 
                if (this->type != RAD_LISTEN_DHCP) {
                        cf_log_err_cp(cp,
-                                  "Broadcast can only be set for DHCP listeners.  Delete this line from the configuration file.");
+                                  "Broadcast can only be set for DHCP listeners.  Delete this line from the configuration file");
                        return -1;
                }
 
@@ -1190,16 +1180,13 @@ int common_socket_parse(CONF_SECTION *cs, rad_listen_t *this)
         */
        client_cs = NULL;
        parentcs = cf_top_section(cs);
-       rcode = cf_item_parse(cs, "clients", PW_TYPE_STRING_PTR,
-                             &section_name, NULL);
+       rcode = cf_item_parse(cs, "clients", FR_ITEM_POINTER(PW_TYPE_STRING, &section_name), NULL);
        if (rcode < 0) return -1; /* bad string */
        if (rcode == 0) {
                /*
                 *      Explicit list given: use it.
                 */
-               client_cs = cf_section_sub_find_name2(parentcs,
-                                                     "clients",
-                                                     section_name);
+               client_cs = cf_section_sub_find_name2(parentcs, "clients", section_name);
                if (!client_cs) {
                        client_cs = cf_section_find(section_name);
                }
@@ -1264,6 +1251,8 @@ static int auth_socket_send(rad_listen_t *listener, REQUEST *request)
        rad_assert(request->listener == listener);
        rad_assert(listener->send == auth_socket_send);
 
+       if (request->reply->code == 0) return 0;
+
 #ifdef WITH_UDPFROMTO
        /*
         *      Overwrite the src ip address on the outbound packet
@@ -1359,7 +1348,8 @@ static int proxy_socket_send(rad_listen_t *listener, REQUEST *request)
 static int stats_socket_recv(rad_listen_t *listener)
 {
        ssize_t         rcode;
-       int             code, src_port;
+       int             code;
+       uint16_t        src_port;
        RADIUS_PACKET   *packet;
        RADCLIENT       *client = NULL;
        fr_ipaddr_t     src_ipaddr;
@@ -1386,7 +1376,7 @@ static int stats_socket_recv(rad_listen_t *listener)
        /*
         *      We only understand Status-Server on this socket.
         */
-       if (code != PW_STATUS_SERVER) {
+       if (code != PW_CODE_STATUS_SERVER) {
                DEBUG("Ignoring packet code %d sent to Status-Server port",
                      code);
                rad_recv_discard(listener->fd);
@@ -1425,7 +1415,8 @@ static int stats_socket_recv(rad_listen_t *listener)
 static int auth_socket_recv(rad_listen_t *listener)
 {
        ssize_t         rcode;
-       int             code, src_port;
+       int             code;
+       uint16_t        src_port;
        RADIUS_PACKET   *packet;
        RAD_REQUEST_FUNP fun = NULL;
        RADCLIENT       *client = NULL;
@@ -1454,15 +1445,15 @@ static int auth_socket_recv(rad_listen_t *listener)
         *      Some sanity checks, based on the packet code.
         */
        switch(code) {
-       case PW_AUTHENTICATION_REQUEST:
+       case PW_CODE_ACCESS_REQUEST:
                fun = rad_authenticate;
                break;
 
-       case PW_STATUS_SERVER:
-               if (!mainconfig.status_server) {
+       case PW_CODE_STATUS_SERVER:
+               if (!main_config.status_server) {
                        rad_recv_discard(listener->fd);
                        FR_STATS_INC(auth, total_unknown_types);
-                       WDEBUG("Ignoring Status-Server request due to security configuration");
+                       WARN("Ignoring Status-Server request due to security configuration");
                        return 0;
                }
                fun = rad_status_server;
@@ -1531,7 +1522,8 @@ static int auth_socket_recv(rad_listen_t *listener)
 static int acct_socket_recv(rad_listen_t *listener)
 {
        ssize_t         rcode;
-       int             code, src_port;
+       int             code;
+       uint16_t        src_port;
        RADIUS_PACKET   *packet;
        RAD_REQUEST_FUNP fun = NULL;
        RADCLIENT       *client = NULL;
@@ -1560,16 +1552,16 @@ static int acct_socket_recv(rad_listen_t *listener)
         *      Some sanity checks, based on the packet code.
         */
        switch(code) {
-       case PW_ACCOUNTING_REQUEST:
+       case PW_CODE_ACCOUNTING_REQUEST:
                fun = rad_accounting;
                break;
 
-       case PW_STATUS_SERVER:
-               if (!mainconfig.status_server) {
+       case PW_CODE_STATUS_SERVER:
+               if (!main_config.status_server) {
                        rad_recv_discard(listener->fd);
                        FR_STATS_INC(acct, total_unknown_types);
 
-                       WDEBUG("Ignoring Status-Server request due to security configuration");
+                       WARN("Ignoring Status-Server request due to security configuration");
                        return 0;
                }
                fun = rad_status_server;
@@ -1644,14 +1636,14 @@ static int rad_coa_recv(REQUEST *request)
         *      Get the correct response
         */
        switch (request->packet->code) {
-       case PW_COA_REQUEST:
-               ack = PW_COA_ACK;
-               nak = PW_COA_NAK;
+       case PW_CODE_COA_REQUEST:
+               ack = PW_CODE_COA_ACK;
+               nak = PW_CODE_COA_NAK;
                break;
 
-       case PW_DISCONNECT_REQUEST:
-               ack = PW_DISCONNECT_ACK;
-               nak = PW_DISCONNECT_NAK;
+       case PW_CODE_DISCONNECT_REQUEST:
+               ack = PW_CODE_DISCONNECT_ACK;
+               nak = PW_CODE_DISCONNECT_NAK;
                break;
 
        default:                /* shouldn't happen */
@@ -1671,12 +1663,12 @@ static int rad_coa_recv(REQUEST *request)
                 *      have a State attribute in it.
                 */
                vp = pairfind(request->packet->vps, PW_SERVICE_TYPE, 0, TAG_ANY);
-               if (request->packet->code == PW_COA_REQUEST) {
+               if (request->packet->code == PW_CODE_COA_REQUEST) {
                        if (vp && (vp->vp_integer == 17)) {
                                vp = pairfind(request->packet->vps, PW_STATE, 0, TAG_ANY);
                                if (!vp || (vp->length == 0)) {
                                        REDEBUG("CoA-Request with Service-Type = Authorize-Only MUST contain a State attribute");
-                                       request->reply->code = PW_COA_NAK;
+                                       request->reply->code = PW_CODE_COA_NAK;
                                        return RLM_MODULE_FAIL;
                                }
                        }
@@ -1685,7 +1677,7 @@ static int rad_coa_recv(REQUEST *request)
                         *      RFC 5176, Section 3.2.
                         */
                        REDEBUG("Disconnect-Request MUST NOT contain a Service-Type attribute");
-                       request->reply->code = PW_DISCONNECT_NAK;
+                       request->reply->code = PW_CODE_DISCONNECT_NAK;
                        return RLM_MODULE_FAIL;
                }
 
@@ -1780,7 +1772,8 @@ static int rad_coa_recv(REQUEST *request)
 static int coa_socket_recv(rad_listen_t *listener)
 {
        ssize_t         rcode;
-       int             code, src_port;
+       int             code;
+       uint16_t        src_port;
        RADIUS_PACKET   *packet;
        RAD_REQUEST_FUNP fun = NULL;
        RADCLIENT       *client = NULL;
@@ -1807,12 +1800,12 @@ static int coa_socket_recv(rad_listen_t *listener)
         *      Some sanity checks, based on the packet code.
         */
        switch(code) {
-       case PW_COA_REQUEST:
+       case PW_CODE_COA_REQUEST:
                FR_STATS_INC(coa, total_requests);
                fun = rad_coa_recv;
                break;
 
-       case PW_DISCONNECT_REQUEST:
+       case PW_CODE_DISCONNECT_REQUEST:
                FR_STATS_INC(dsc, total_requests);
                fun = rad_coa_recv;
                break;
@@ -1865,21 +1858,21 @@ static int proxy_socket_recv(rad_listen_t *listener)
         *      FIXME: Client MIB updates?
         */
        switch(packet->code) {
-       case PW_AUTHENTICATION_ACK:
-       case PW_ACCESS_CHALLENGE:
-       case PW_AUTHENTICATION_REJECT:
+       case PW_CODE_ACCESS_ACCEPT:
+       case PW_CODE_ACCESS_CHALLENGE:
+       case PW_CODE_ACCESS_REJECT:
                break;
 
 #ifdef WITH_ACCOUNTING
-       case PW_ACCOUNTING_RESPONSE:
+       case PW_CODE_ACCOUNTING_RESPONSE:
                break;
 #endif
 
 #ifdef WITH_COA
-       case PW_DISCONNECT_ACK:
-       case PW_DISCONNECT_NAK:
-       case PW_COA_ACK:
-       case PW_COA_NAK:
+       case PW_CODE_DISCONNECT_ACK:
+       case PW_CODE_DISCONNECT_NAK:
+       case PW_CODE_COA_ACK:
+       case PW_CODE_COA_NAK:
                break;
 #endif
 
@@ -1914,10 +1907,12 @@ static int proxy_socket_tcp_recv(rad_listen_t *listener)
        listen_socket_t *sock = listener->data;
        char            buffer[128];
 
+       if (listener->status != RAD_LISTEN_STATUS_KNOWN) return 0;
+
        packet = fr_tcp_recv(listener->fd, 0);
        if (!packet) {
-               listener->status = RAD_LISTEN_STATUS_REMOVE_NOW;
-               event_new_fd(listener);
+               listener->status = RAD_LISTEN_STATUS_EOL;
+               radius_update_listener(listener);
                return 0;
        }
 
@@ -1925,13 +1920,13 @@ static int proxy_socket_tcp_recv(rad_listen_t *listener)
         *      FIXME: Client MIB updates?
         */
        switch(packet->code) {
-       case PW_AUTHENTICATION_ACK:
-       case PW_ACCESS_CHALLENGE:
-       case PW_AUTHENTICATION_REJECT:
+       case PW_CODE_ACCESS_ACCEPT:
+       case PW_CODE_ACCESS_CHALLENGE:
+       case PW_CODE_ACCESS_REJECT:
                break;
 
 #ifdef WITH_ACCOUNTING
-       case PW_ACCOUNTING_RESPONSE:
+       case PW_CODE_ACCOUNTING_RESPONSE:
                break;
 #endif
 
@@ -2202,7 +2197,7 @@ static int listen_bind(rad_listen_t *this)
 #endif
 
                default:
-                       WDEBUG("Internal sanity check failed in binding to socket.  Ignoring problem.");
+                       WARN("Internal sanity check failed in binding to socket.  Ignoring problem");
                        return -1;
                }
        }
@@ -2224,7 +2219,7 @@ static int listen_bind(rad_listen_t *this)
 
                this->print(this, buffer, sizeof(buffer));
 
-               ERROR("Failed opening %s: %s", buffer, strerror(errno));
+               ERROR("Failed opening %s: %s", buffer, fr_syserror(errno));
                return -1;
        }
 
@@ -2237,7 +2232,7 @@ static int listen_bind(rad_listen_t *this)
        if (rcode >= 0) {
                if (fcntl(this->fd, F_SETFD, rcode | FD_CLOEXEC) < 0) {
                        close(this->fd);
-                       ERROR("Failed setting close on exec: %s", strerror(errno));
+                       ERROR("Failed setting close on exec: %s", fr_syserror(errno));
                        return -1;
                }
        }
@@ -2260,7 +2255,7 @@ static int listen_bind(rad_listen_t *this)
                if (rcode < 0) {
                        close(this->fd);
                        ERROR("Failed binding to interface %s: %s",
-                              sock->interface, strerror(errno));
+                              sock->interface, fr_syserror(errno));
                        return -1;
                } /* else it worked. */
 #else
@@ -2282,7 +2277,7 @@ static int listen_bind(rad_listen_t *this)
                                if (sock->my_ipaddr.scope == 0) {
                                        close(this->fd);
                                        ERROR("Failed finding interface %s: %s",
-                                              sock->interface, strerror(errno));
+                                              sock->interface, fr_syserror(errno));
                                        return -1;
                                }
                        } /* else scope was defined: we're OK. */
@@ -2307,7 +2302,7 @@ static int listen_bind(rad_listen_t *this)
 
                if (setsockopt(this->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0) {
                        close(this->fd);
-                       ERROR("Failed to reuse address: %s", strerror(errno));
+                       ERROR("Failed to reuse address: %s", fr_syserror(errno));
                        return -1;
                }
        }
@@ -2323,7 +2318,7 @@ static int listen_bind(rad_listen_t *this)
         */
        if (udpfromto_init(this->fd) != 0) {
                ERROR("Failed initializing udpfromto: %s",
-                      strerror(errno));
+                      fr_syserror(errno));
                close(this->fd);
                return -1;
        }
@@ -2353,9 +2348,9 @@ static int listen_bind(rad_listen_t *this)
                        if (setsockopt(this->fd, IPPROTO_IPV6, IPV6_V6ONLY,
                                       (char *)&on, sizeof(on)) < 0) {
                                ERROR("Failed setting socket to IPv6 "
-                                      "only: %s", strerror(errno));
+                                      "only: %s", fr_syserror(errno));
 
-                               close(this->fd);
+                               close(this->fd);
                                return -1;
                        }
                }
@@ -2376,7 +2371,7 @@ static int listen_bind(rad_listen_t *this)
                if (setsockopt(this->fd, IPPROTO_IP, IP_MTU_DISCOVER,
                               &flag, sizeof(flag)) < 0) {
                        ERROR("Failed disabling PMTU discovery: %s",
-                              strerror(errno));
+                              fr_syserror(errno));
 
                        close(this->fd);
                        return -1;
@@ -2391,7 +2386,7 @@ static int listen_bind(rad_listen_t *this)
                if (setsockopt(this->fd, IPPROTO_IP, IP_DONTFRAG,
                               &flag, sizeof(flag)) < 0) {
                        ERROR("Failed setting don't fragment flag: %s",
-                              strerror(errno));
+                              fr_syserror(errno));
 
                        close(this->fd);
                        return -1;
@@ -2406,7 +2401,7 @@ static int listen_bind(rad_listen_t *this)
 
                if (setsockopt(this->fd, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on)) < 0) {
                        ERROR("Can't set broadcast option: %s",
-                              strerror(errno));
+                              fr_syserror(errno));
                        return -1;
                }
        }
@@ -2417,16 +2412,6 @@ static int listen_bind(rad_listen_t *this)
         *      May be binding to priviledged ports.
         */
        if (sock->my_port != 0) {
-#ifdef SO_REUSEADDR
-               int on = 1;
-
-               if (setsockopt(this->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0) {
-                       ERROR("Can't set re-use address option: %s",
-                              strerror(errno));
-                       return -1;
-               }
-#endif
-
                fr_suid_up();
                rcode = bind(this->fd, (struct sockaddr *) &salocal, salen);
                fr_suid_down();
@@ -2436,7 +2421,7 @@ static int listen_bind(rad_listen_t *this)
 
                        this->print(this, buffer, sizeof(buffer));
                        ERROR("Failed binding to %s: %s\n",
-                              buffer, strerror(errno));
+                              buffer, fr_syserror(errno));
                        return -1;
                }
 
@@ -2453,7 +2438,7 @@ static int listen_bind(rad_listen_t *this)
                        if (getsockname(this->fd, (struct sockaddr *) &src,
                                        &sizeof_src) < 0) {
                                ERROR("Failed getting socket name: %s",
-                                      strerror(errno));
+                                      fr_syserror(errno));
                                return -1;
                        }
 
@@ -2468,23 +2453,35 @@ static int listen_bind(rad_listen_t *this)
 #ifdef WITH_TCP
        if (sock->proto == IPPROTO_TCP) {
                /*
-                *      Allow a backlog of 8 listeners
+                *      If there are hard-coded worker threads, OR
+                *      it's a TLS connection, it's blocking.
+                *
+                *      Otherwise, they're non-blocking.
                 */
-               if (listen(this->fd, 8) < 0) {
-                       close(this->fd);
-                       ERROR("Failed in listen(): %s", strerror(errno));
-                       return -1;
+               if (!this->workers
+#ifdef WITH_PROXY
+#ifdef WITH_TLS
+                   && (this->type == RAD_LISTEN_PROXY) && !this->tls
+#endif
+#endif
+                       ) {
+                       if (fr_nonblock(this->fd) < 0) {
+                               close(this->fd);
+                               ERROR("Failed setting non-blocking on socket: %s",
+                                     fr_syserror(errno));
+                               return -1;
+                       }
                }
 
                /*
-                *      If there are hard-coded worker threads, they're blocking.
-                *
-                *      Otherwise, they're non-blocking.
+                *      Allow a backlog of 8 listeners, but only for incoming interfaces.
                 */
-               if (!this->workers && fr_nonblock(this->fd) < 0) {
+#ifdef WITH_PROXY
+               if (this->type != RAD_LISTEN_PROXY)
+#endif
+               if (listen(this->fd, 8) < 0) {
                        close(this->fd);
-                       ERROR("Failed setting non-blocking on socket: %s",
-                             strerror(errno));
+                       ERROR("Failed in listen(): %s", fr_syserror(errno));
                        return -1;
                }
        }
@@ -2505,12 +2502,8 @@ static int listen_bind(rad_listen_t *this)
 }
 
 
-static int listener_free(void *ctx)
+static int _listener_free(rad_listen_t *this)
 {
-       rad_listen_t *this;
-
-       this = talloc_get_type_abort(ctx, rad_listen_t);
-
        /*
         *      Other code may have eaten the FD.
         */
@@ -2535,19 +2528,24 @@ static int listener_free(void *ctx)
                ) {
                listen_socket_t *sock = this->data;
 
+               rad_free(&sock->packet);
+
+               rad_assert(sock->ev == NULL);
+
 #ifdef WITH_TLS
-               if (sock->request) {
-#  ifdef HAVE_PTHREAD_H
+               /*
+                *      Note that we do NOT free this->tls, as the
+                *      pointer is parented by its CONF_SECTION.  It
+                *      may be used by multiple listeners.
+                */
+               if (this->tls) {
+                       TALLOC_FREE(sock->ssn);
+                       TALLOC_FREE(sock->request);
+#ifdef HAVE_PTHREAD_H
                        pthread_mutex_destroy(&(sock->mutex));
-#  endif
-                       request_free(&sock->request);
-                       sock->packet = NULL;
-
-                       if (sock->ssn) session_free(sock->ssn);
-                       request_free(&sock->request);
-               } else
 #endif
-                       rad_free(&sock->packet);
+               }
+#endif /* WITH_TLS */
        }
 #endif                         /* WITH_TCP */
 
@@ -2570,7 +2568,7 @@ static rad_listen_t *listen_alloc(TALLOC_CTX *ctx, RAD_LISTEN_TYPE type)
        this->encode = master_listen[this->type].encode;
        this->decode = master_listen[this->type].decode;
 
-       talloc_set_destructor((void *) this, listener_free);
+       talloc_set_destructor(this, _listener_free);
 
        this->data = talloc_zero_array(this, uint8_t, master_listen[this->type].inst_size);
 
@@ -2584,22 +2582,31 @@ static rad_listen_t *listen_alloc(TALLOC_CTX *ctx, RAD_LISTEN_TYPE type)
  *     Not thread-safe, but all calls to it are protected by the
  *     proxy mutex in event.c
  */
-rad_listen_t *proxy_new_listener(home_server *home, int src_port)
+rad_listen_t *proxy_new_listener(home_server_t *home, uint16_t src_port)
 {
+       time_t now;
        rad_listen_t *this;
        listen_socket_t *sock;
        char buffer[256];
 
        if (!home) return NULL;
 
+       rad_assert(home->server == NULL); /* we only open real sockets */
+
        if ((home->limit.max_connections > 0) &&
            (home->limit.num_connections >= home->limit.max_connections)) {
-               WDEBUG("Home server has too many open connections (%d)",
-                     home->limit.max_connections);
+               RATE_LIMIT(INFO("Home server %s has too many open connections (%d)",
+                               home->name, home->limit.max_connections));
+               return NULL;
+       }
+
+       now = time(NULL);
+       if (home->last_failed_open == now) {
+               WARN("Suppressing attempt to open socket to 'down' home server");
                return NULL;
        }
 
-       this = listen_alloc(mainconfig.config, RAD_LISTEN_PROXY);
+       this = listen_alloc(main_config.config, RAD_LISTEN_PROXY);
 
        sock = this->data;
        sock->other_ipaddr = home->ipaddr;
@@ -2610,13 +2617,17 @@ rad_listen_t *proxy_new_listener(home_server *home, int src_port)
        sock->my_port = src_port;
        sock->proto = home->proto;
 
+       /*
+        *      For error messages.
+        */
+       this->print(this, buffer, sizeof(buffer));
+
        if (debug_flag >= 2) {
-               this->print(this, buffer, sizeof(buffer));
-               DEBUG("Opening new %s", buffer);
+               DEBUG("Opening new proxy socket '%s'", buffer);
        }
 
 #ifdef WITH_TCP
-       sock->opened = sock->last_packet = time(NULL);
+       sock->opened = sock->last_packet = now;
 
        if (home->proto == IPPROTO_TCP) {
                this->recv = proxy_socket_tcp_recv;
@@ -2630,31 +2641,37 @@ rad_listen_t *proxy_new_listener(home_server *home, int src_port)
                 */
                this->fd = fr_tcp_client_socket(&home->src_ipaddr,
                                                &home->ipaddr, home->port);
-#ifdef WITH_TLS
-               if (home->tls) {
-                       DEBUG("Trying SSL to port %d\n", home->port);
-                       sock->ssn = tls_new_client_session(home->tls, this->fd);
-                       if (!sock->ssn) {
-                               listen_free(&this);
-                               return NULL;
-                       }
-
-                       this->recv = proxy_tls_recv;
-                       this->send = proxy_tls_send;
-               }
-#endif
        } else
 #endif
                this->fd = fr_socket(&home->src_ipaddr, src_port);
 
        if (this->fd < 0) {
                this->print(this, buffer,sizeof(buffer));
-               DEBUG("Failed opening client socket ::%s:: : %s",
+               ERROR("Failed opening proxy socket '%s' : %s",
                      buffer, fr_strerror());
+               home->last_failed_open = now;
                listen_free(&this);
                return NULL;
        }
 
+
+#ifdef WITH_TCP
+#ifdef WITH_TLS
+       if ((home->proto == IPPROTO_TCP) && home->tls) {
+               DEBUG("Trying SSL to port %d\n", home->port);
+               sock->ssn = tls_new_client_session(home->tls, this->fd);
+               if (!sock->ssn) {
+                       ERROR("Failed starting SSL to '%s'", buffer);
+                       home->last_failed_open = now;
+                       listen_free(&this);
+                       return NULL;
+               }
+
+               this->recv = proxy_tls_recv;
+               this->send = proxy_tls_send;
+       }
+#endif
+#endif
        /*
         *      Figure out which port we were bound to.
         */
@@ -2665,25 +2682,28 @@ rad_listen_t *proxy_new_listener(home_server *home, int src_port)
                memset(&src, 0, sizeof_src);
                if (getsockname(this->fd, (struct sockaddr *) &src,
                                &sizeof_src) < 0) {
-                       ERROR("Failed getting socket name: %s",
-                              strerror(errno));
+                       ERROR("Failed getting socket name for '%s': %s",
+                             buffer, fr_syserror(errno));
+                       home->last_failed_open = now;
                        listen_free(&this);
                        return NULL;
                }
 
                if (!fr_sockaddr2ipaddr(&src, sizeof_src,
                                        &sock->my_ipaddr, &sock->my_port)) {
-                       ERROR("Socket has unsupported address family");
+                       ERROR("Socket has unsupported address family for '%s'", buffer);
+                       home->last_failed_open = now;
                        listen_free(&this);
                        return NULL;
                }
        }
 
+       home->limit.num_connections++;
+
        return this;
 }
 #endif
 
-
 static const FR_NAME_NUMBER listen_compare[] = {
 #ifdef WITH_STATS
        { "status",     RAD_LISTEN_NONE },
@@ -2714,11 +2734,16 @@ static const FR_NAME_NUMBER listen_compare[] = {
        { NULL, 0 },
 };
 
+static int _free_proto_handle(lt_dlhandle *handle)
+{
+       dlclose(*handle);
+       return 0;
+}
 
 static rad_listen_t *listen_parse(CONF_SECTION *cs, char const *server)
 {
        int             type, rcode;
-       char            *listen_type;
+       char const      *listen_type;
        rad_listen_t    *this;
        CONF_PAIR       *cp;
        char const      *value;
@@ -2743,6 +2768,7 @@ static rad_listen_t *listen_parse(CONF_SECTION *cs, char const *server)
        handle = lt_dlopenext(buffer);
        if (handle) {
                fr_protocol_t   *proto;
+               lt_dlhandle     *marker;
 
                proto = dlsym(handle, buffer);
                if (!proto) {
@@ -2759,9 +2785,11 @@ static rad_listen_t *listen_parse(CONF_SECTION *cs, char const *server)
                memcpy(&master_listen[type], proto, sizeof(*proto));
 
                /*
-                *      And throw away the handle.
-                *      @todo: fix it later
+                *      Ensure handle gets closed if config section gets freed
                 */
+               marker = talloc(cs, lt_dlhandle);
+               *marker = handle;
+               talloc_set_destructor(marker, _free_proto_handle);
 
                if (master_listen[type].magic !=  RLM_MODULE_INIT) {
                        ERROR("Failed to load protocol '%s' due to internal sanity check problem",
@@ -2773,8 +2801,7 @@ static rad_listen_t *listen_parse(CONF_SECTION *cs, char const *server)
        cf_log_info(cs, "listen {");
 
        listen_type = NULL;
-       rcode = cf_item_parse(cs, "type", PW_TYPE_STRING_PTR,
-                             &listen_type, "");
+       rcode = cf_item_parse(cs, "type", FR_ITEM_POINTER(PW_TYPE_STRING, &listen_type), "");
        if (rcode < 0) return NULL;
        if (rcode == 1) {
                cf_log_err_cs(cs,
@@ -2795,12 +2822,7 @@ static rad_listen_t *listen_parse(CONF_SECTION *cs, char const *server)
         *      refer to a server.
         */
        if (!server) {
-               rcode = cf_item_parse(cs, "virtual_server", PW_TYPE_STRING_PTR,
-                                     &server, NULL);
-               if (rcode == 1) { /* compatiblity with 2.0-pre */
-                       rcode = cf_item_parse(cs, "server", PW_TYPE_STRING_PTR,
-                                             &server, NULL);
-               }
+               rcode = cf_item_parse(cs, "virtual_server", FR_ITEM_POINTER(PW_TYPE_STRING, &server), NULL);
                if (rcode < 0) return NULL;
        }
 
@@ -2845,29 +2867,6 @@ static rad_listen_t *listen_parse(CONF_SECTION *cs, char const *server)
        return this;
 }
 
-#ifdef WITH_PROXY
-static int is_loopback(fr_ipaddr_t const *ipaddr)
-{
-       /*
-        *      We shouldn't proxy on loopback.
-        */
-       if ((ipaddr->af == AF_INET) &&
-           (ipaddr->ipaddr.ip4addr.s_addr == htonl(INADDR_LOOPBACK))) {
-               return 1;
-       }
-
-#ifdef HAVE_STRUCT_SOCKADDR_IN6
-       if ((ipaddr->af == AF_INET6) &&
-           (IN6_IS_ADDR_LINKLOCAL(&ipaddr->ipaddr.ip6addr))) {
-               return 1;
-       }
-#endif
-
-       return 0;
-}
-#endif
-
-
 #ifdef HAVE_PTHREAD_H
 /*
  *     A child thread which does NOTHING other than read and process
@@ -2893,21 +2892,21 @@ static void *recv_thread(void *arg)
  */
 int listen_init(CONF_SECTION *config, rad_listen_t **head,
 #ifdef WITH_TLS
-               int spawn_flag
+               bool spawn_flag
 #else
-               UNUSED int spawn_flag
+               UNUSED bool spawn_flag
 #endif
-               )
+               )
 
 {
-       int             override = false;
+       bool            override = false;
        CONF_SECTION    *cs = NULL;
        rad_listen_t    **last;
        rad_listen_t    *this;
        fr_ipaddr_t     server_ipaddr;
-       int             auth_port = 0;
+       uint16_t        auth_port = 0;
 #ifdef WITH_PROXY
-       int             defined_proxy = 0;
+       bool            defined_proxy = false;
 #endif
 
        /*
@@ -2926,16 +2925,15 @@ int listen_init(CONF_SECTION *config, rad_listen_t **head,
         *
         *      FIXME: If argv[0] == "vmpsd", then don't listen on auth/acct!
         */
-       if (mainconfig.port >= 0) {
-               auth_port = mainconfig.port;
+       if (main_config.port > 0) {
+               auth_port = main_config.port;
 
                /*
                 *      -p X but no -i Y on the command-line.
                 */
-               if ((mainconfig.port > 0) &&
-                   (mainconfig.myip.af == AF_UNSPEC)) {
+               if (main_config.myip.af == AF_UNSPEC) {
                        ERROR("The command-line says \"-p %d\", but there is no associated IP address to use",
-                              mainconfig.port);
+                             main_config.port);
                        return -1;
                }
        }
@@ -2944,10 +2942,10 @@ int listen_init(CONF_SECTION *config, rad_listen_t **head,
         *      If the IP address was configured on the command-line,
         *      use that as the "bind_address"
         */
-       if (mainconfig.myip.af != AF_UNSPEC) {
+       if (main_config.myip.af != AF_UNSPEC) {
                listen_socket_t *sock;
 
-               memcpy(&server_ipaddr, &mainconfig.myip,
+               memcpy(&server_ipaddr, &main_config.myip,
                       sizeof(server_ipaddr));
                override = true;
 
@@ -2981,8 +2979,8 @@ int listen_init(CONF_SECTION *config, rad_listen_t **head,
                auth_port = sock->my_port;      /* may have been updated in listen_bind */
                if (override) {
                        cs = cf_section_sub_find_name2(config, "server",
-                                                      mainconfig.name);
-                       if (cs) this->server = mainconfig.name;
+                                                      main_config.name);
+                       if (cs) this->server = main_config.name;
                }
 
                *last = this;
@@ -3030,8 +3028,8 @@ int listen_init(CONF_SECTION *config, rad_listen_t **head,
 
                if (override) {
                        cs = cf_section_sub_find_name2(config, "server",
-                                                      mainconfig.name);
-                       if (cs) this->server = mainconfig.name;
+                                                      main_config.name);
+                       if (cs) this->server = main_config.name;
                }
 
                *last = this;
@@ -3043,12 +3041,12 @@ int listen_init(CONF_SECTION *config, rad_listen_t **head,
         *      They specified an IP on the command-line, ignore
         *      all listen sections except the one in '-n'.
         */
-       if (mainconfig.myip.af != AF_UNSPEC) {
+       if (main_config.myip.af != AF_UNSPEC) {
                CONF_SECTION *subcs;
                char const *name2 = cf_section_name2(cs);
 
                cs = cf_section_sub_find_name2(config, "server",
-                                              mainconfig.name);
+                                              main_config.name);
                if (!cs) goto add_sockets;
 
                /*
@@ -3117,7 +3115,7 @@ add_sockets:
         *      proxying is pointless.
         */
        if (!*head) {
-               ERROR("The server is not configured to listen on any ports.  Cannot start.");
+               ERROR("The server is not configured to listen on any ports.  Cannot start");
                return -1;
        }
 
@@ -3128,15 +3126,16 @@ add_sockets:
        for (this = *head; this != NULL; this = this->next) {
 #ifdef WITH_PROXY
                if (this->type == RAD_LISTEN_PROXY) {
-                       defined_proxy = 1;
+                       defined_proxy = true;
                }
 
 #endif
 
 #ifdef WITH_TLS
                if (!check_config && !spawn_flag && this->tls) {
-                       cf_log_err_cs(this->cs, "Threading must be enabled for TLS sockets to function properly.");
-                       cf_log_err_cs(this->cs, "You probably need to do 'radiusd -fxx -l stdout' for debugging");
+                       cf_log_err_cs(this->cs, "Threading must be enabled for TLS sockets to function properly");
+                       cf_log_err_cs(this->cs, "You probably need to do '%s -fxx -l stdout' for debugging",
+                                     progname);
                        return -1;
                }
 #endif
@@ -3147,11 +3146,9 @@ add_sockets:
                        }
 
                        if (this->workers) {
-#ifndef HAVE_PTHREAD_H
-                               WARN("Setting 'workers' requires 'synchronous'.  Disabling 'workers'");
-                               this->workers = 0;
-#else
-                               int i, rcode;
+#ifdef HAVE_PTHREAD_H
+                               int rcode;
+                               uint32_t i;
                                char buffer[256];
 
                                this->print(this, buffer, sizeof(buffer));
@@ -3165,15 +3162,20 @@ add_sockets:
                                        rcode = pthread_create(&id, 0, recv_thread, this);
                                        if (rcode != 0) {
                                                ERROR("Thread create failed: %s",
-                                                     strerror(rcode));
+                                                     fr_syserror(rcode));
                                                fr_exit(1);
                                        }
 
                                        DEBUG("Thread %d for %s\n", i, buffer);
                                }
+#else
+                               WARN("Setting 'workers' requires 'synchronous'.  Disabling 'workers'");
+                               this->workers = 0;
 #endif
-                       } else
-                               event_new_fd(this);
+
+                       } else {
+                               radius_update_listener(this);
+                       }
 
                }
        }
@@ -3183,12 +3185,11 @@ add_sockets:
         *      Otherwise, don't do anything.
         */
 #ifdef WITH_PROXY
-       if ((mainconfig.proxy_requests == true) &&
+       if ((main_config.proxy_requests == true) &&
            !check_config &&
            (*head != NULL) && !defined_proxy) {
-               listen_socket_t *sock = NULL;
-               int             port = 0;
-               home_server     home;
+               uint16_t        port = 0;
+               home_server_t   home;
 
                memset(&home, 0, sizeof(home));
 
@@ -3197,39 +3198,7 @@ add_sockets:
                 */
                home.proto = IPPROTO_UDP;
                home.src_ipaddr = server_ipaddr;
-
-               /*
-                *      Find the first authentication port,
-                *      and use it
-                */
-               for (this = *head; this != NULL; this = this->next) {
-                       switch (this->type) {
-                       case RAD_LISTEN_AUTH:
-                               sock = this->data;
-
-                               if (is_loopback(&sock->my_ipaddr)) continue;
-
-                               if (home.src_ipaddr.af == AF_UNSPEC) {
-                                       home.src_ipaddr = sock->my_ipaddr;
-                               }
-                               port = sock->my_port + 2;
-                               break;
-#ifdef WITH_ACCT
-                       case RAD_LISTEN_ACCT:
-                               sock = this->data;
-
-                               if (is_loopback(&sock->my_ipaddr)) continue;
-
-                               if (home.src_ipaddr.af == AF_UNSPEC) {
-                                       home.src_ipaddr = sock->my_ipaddr;
-                               }
-                               port = sock->my_port + 1;
-                               break;
-#endif
-                       default:
-                               break;
-                       }
-               }
+               port = 0;
 
                /*
                 *      Address is still unspecified, use IPv4.
@@ -3248,11 +3217,7 @@ add_sockets:
                        return -1;
                }
 
-               if (!event_new_fd(this)) {
-                       listen_free(&this);
-                       listen_free(head);
-                       return -1;
-               }
+               radius_update_listener(this);
        }
 #endif
 
@@ -3286,12 +3251,11 @@ void listen_free(rad_listen_t **head)
 }
 
 #ifdef WITH_STATS
-RADCLIENT_LIST *listener_find_client_list(fr_ipaddr_t const *ipaddr,
-                                         int port)
+RADCLIENT_LIST *listener_find_client_list(fr_ipaddr_t const *ipaddr, uint16_t port)
 {
        rad_listen_t *this;
 
-       for (this = mainconfig.listen; this != NULL; this = this->next) {
+       for (this = main_config.listen; this != NULL; this = this->next) {
                listen_socket_t *sock;
 
                if ((this->type != RAD_LISTEN_AUTH)
@@ -3312,11 +3276,11 @@ RADCLIENT_LIST *listener_find_client_list(fr_ipaddr_t const *ipaddr,
 }
 #endif
 
-rad_listen_t *listener_find_byipaddr(fr_ipaddr_t const *ipaddr, int port, int proto)
+rad_listen_t *listener_find_byipaddr(fr_ipaddr_t const *ipaddr, uint16_t port, int proto)
 {
        rad_listen_t *this;
 
-       for (this = mainconfig.listen; this != NULL; this = this->next) {
+       for (this = main_config.listen; this != NULL; this = this->next) {
                listen_socket_t *sock;
 
                sock = this->data;
@@ -3331,7 +3295,7 @@ rad_listen_t *listener_find_byipaddr(fr_ipaddr_t const *ipaddr, int port, int pr
        /*
         *      Failed to find a specific one.  Find INADDR_ANY
         */
-       for (this = mainconfig.listen; this != NULL; this = this->next) {
+       for (this = main_config.listen; this != NULL; this = this->next) {
                listen_socket_t *sock;
 
                sock = this->data;