Signed / unsigned fixes and function prototypes
[freeradius.git] / src / main / realms.c
index 4ece027..37ceb48 100644 (file)
@@ -32,12 +32,38 @@ RCSID("$Id$")
 #include <ctype.h>
 #include <fcntl.h>
 
+#ifdef HAVE_REGEX_H
+#include <regex.h>
+
+/*
+ *  For POSIX Regular expressions.
+ *  (0) Means no extended regular expressions.
+ *  REG_EXTENDED means use extended regular expressions.
+ */
+#ifndef REG_EXTENDED
+#define REG_EXTENDED (0)
+#endif
+
+#ifndef REG_NOSUB
+#define REG_NOSUB (0)
+#endif
+
+#ifndef REG_ICASE
+#define REG_ICASE (0)
+#endif
+#endif
+
 static rbtree_t *realms_byname = NULL;
 
-static rbtree_t        *home_servers_byaddr = NULL;
-static rbtree_t        *home_servers_byname = NULL;
+#ifdef HAVE_REGEX_H
+typedef struct realm_regex_t {
+       REALM   *realm;
+       struct realm_regex_t *next;
+} realm_regex_t;
 
-static rbtree_t        *home_pools_byname = NULL;
+static realm_regex_t *realms_regex = NULL;
+
+#endif /* HAVE_REGEX_H */
 
 typedef struct realm_config_t {
        CONF_SECTION    *cs;
@@ -50,6 +76,16 @@ typedef struct realm_config_t {
 
 static realm_config_t *realm_config = NULL;
 
+#ifdef WITH_PROXY
+static rbtree_t        *home_servers_byaddr = NULL;
+static rbtree_t        *home_servers_byname = NULL;
+#ifdef WITH_STATS
+static int home_server_max_number = 0;
+static rbtree_t        *home_servers_bynumber = NULL;
+#endif
+
+static rbtree_t        *home_pools_byname = NULL;
+
 /*
  *  Map the proxy server configuration parameters to variables.
  */
@@ -76,6 +112,7 @@ static const CONF_PARSER proxy_config[] = {
 
        { NULL, -1, 0, NULL, NULL }
 };
+#endif
 
 static int realm_name_cmp(const void *one, const void *two)
 {
@@ -86,6 +123,7 @@ static int realm_name_cmp(const void *one, const void *two)
 }
 
 
+#ifdef WITH_PROXY
 static int home_server_name_cmp(const void *one, const void *two)
 {
        const home_server *a = one;
@@ -102,12 +140,35 @@ static int home_server_addr_cmp(const void *one, const void *two)
        const home_server *a = one;
        const home_server *b = two;
 
+       if (a->server && !b->server) return -1;
+       if (!a->server && b->server) return +1;
+
+       if (a->server && b->server) {
+               int rcode = a->type - b->type;
+               if (rcode != 0) return rcode;
+               return strcmp(a->server, b->server);
+       }
+
+#ifdef WITH_TCP
+       if (a->proto < b->proto) return -1;
+       if (a->proto > b->proto) return +1;
+#endif
+
        if (a->port < b->port) return -1;
        if (a->port > b->port) return +1;
 
        return fr_ipaddr_cmp(&a->ipaddr, &b->ipaddr);
 }
 
+#ifdef WITH_STATS
+static int home_server_number_cmp(const void *one, const void *two)
+{
+       const home_server *a = one;
+       const home_server *b = two;
+
+       return (a->number - b->number);
+}
+#endif
 
 static int home_pool_name_cmp(const void *one, const void *two)
 {
@@ -121,6 +182,36 @@ static int home_pool_name_cmp(const void *one, const void *two)
 }
 
 
+static size_t xlat_cs(CONF_SECTION *cs, char *fmt, char *out, size_t outlen)
+
+{
+       const char *value = NULL;
+
+       /*
+        *      Instance name
+        */
+       if (strcmp(fmt, "instance") == 0) {
+               value = cf_section_name2(cs);
+               if (!value) {
+                       *out = '\0';
+                       return 0;
+               }
+       } else {
+               CONF_PAIR *cp;
+
+               cp = cf_pair_find(cs, fmt);
+               if (!cp || !(value = cf_pair_value(cp))) {
+                       *out = '\0';
+                       return 0;
+               }
+       }
+
+       strlcpy(out, value, outlen);
+
+       return strlen(out);
+}
+
+
 /*
  *     Xlat for %{home_server:foo}
  */
@@ -128,9 +219,6 @@ static size_t xlat_home_server(UNUSED void *instance, REQUEST *request,
                               char *fmt, char *out, size_t outlen,
                               UNUSED RADIUS_ESCAPE_STRING func)
 {
-       const char *value = NULL;
-       CONF_PAIR *cp;
-
        if (!fmt || !out || (outlen < 1)) return 0;
 
        if (!request || !request->home_server) {
@@ -138,15 +226,7 @@ static size_t xlat_home_server(UNUSED void *instance, REQUEST *request,
                return 0;
        }
 
-       cp = cf_pair_find(request->home_server->cs, fmt);
-       if (!cp || !(value = cf_pair_value(cp))) {
-               *out = '\0';
-               return 0;
-       }
-       
-       strlcpy(out, value, outlen);
-
-       return strlen(out);
+       return xlat_cs(request->home_server->cs, fmt, out, outlen);
 }
 
 
@@ -157,9 +237,6 @@ static size_t xlat_server_pool(UNUSED void *instance, REQUEST *request,
                               char *fmt, char *out, size_t outlen,
                               UNUSED RADIUS_ESCAPE_STRING func)
 {
-       const char *value = NULL;
-       CONF_PAIR *cp;
-
        if (!fmt || !out || (outlen < 1)) return 0;
 
        if (!request || !request->home_pool) {
@@ -167,20 +244,18 @@ static size_t xlat_server_pool(UNUSED void *instance, REQUEST *request,
                return 0;
        }
 
-       cp = cf_pair_find(request->home_pool->cs, fmt);
-       if (!cp || !(value = cf_pair_value(cp))) {
-               *out = '\0';
-               return 0;
-       }
-       
-       strlcpy(out, value, outlen);
-
-       return strlen(out);
+       return xlat_cs(request->home_pool->cs, fmt, out, outlen);
 }
-
+#endif
 
 void realms_free(void)
 {
+#ifdef WITH_PROXY
+#ifdef WITH_STATS
+       rbtree_free(home_servers_bynumber);
+       home_servers_bynumber = NULL;
+#endif
+
        rbtree_free(home_servers_byname);
        home_servers_byname = NULL;
 
@@ -189,24 +264,63 @@ void realms_free(void)
 
        rbtree_free(home_pools_byname);
        home_pools_byname = NULL;
+#endif
 
        rbtree_free(realms_byname);
        realms_byname = NULL;
 
+#ifdef HAVE_REGEX_H
+       if (realms_regex) {
+               realm_regex_t *this, *next;
+
+               for (this = realms_regex; this != NULL; this = next) {
+                       next = this->next;
+                       free(this->realm);
+                       free(this);
+               }
+               realms_regex = NULL;
+       }
+#endif
+
        free(realm_config);
+       realm_config = NULL;
 }
 
 
+#ifdef WITH_PROXY
+static CONF_PARSER limit_config[] = {
+       { "max_connections", PW_TYPE_INTEGER,
+         offsetof(home_server, max_connections), NULL,   "16" },
+
+       { "max_requests", PW_TYPE_INTEGER,
+         offsetof(home_server,max_requests), NULL,   "0" },
+
+       { "lifetime", PW_TYPE_INTEGER,
+         offsetof(home_server,lifetime), NULL,   "0" },
+
+       { "idle_timeout", PW_TYPE_INTEGER,
+         offsetof(home_server,idle_timeout), NULL,   "0" },
+
+       { NULL, -1, 0, NULL, NULL }             /* end the list */
+};
+
 static struct in_addr hs_ip4addr;
 static struct in6_addr hs_ip6addr;
+static char *hs_srcipaddr = NULL;
 static char *hs_type = NULL;
 static char *hs_check = NULL;
+static char *hs_virtual_server = NULL;
+#ifdef WITH_TCP
+static char *hs_proto = NULL;
+#endif
 
 static CONF_PARSER home_server_config[] = {
        { "ipaddr",  PW_TYPE_IPADDR,
          0, &hs_ip4addr,  NULL },
        { "ipv6addr",  PW_TYPE_IPV6ADDR,
          0, &hs_ip6addr, NULL },
+       { "virtual_server",  PW_TYPE_STRING_PTR,
+         0, &hs_virtual_server, NULL },
 
        { "port", PW_TYPE_INTEGER,
          offsetof(home_server,port), NULL,   "0" },
@@ -214,20 +328,32 @@ static CONF_PARSER home_server_config[] = {
        { "type",  PW_TYPE_STRING_PTR,
          0, &hs_type, NULL },
 
+#ifdef WITH_TCP
+       { "proto",  PW_TYPE_STRING_PTR,
+         0, &hs_proto, NULL },
+#endif
+
        { "secret",  PW_TYPE_STRING_PTR,
          offsetof(home_server,secret), NULL,  NULL},
 
+       { "src_ipaddr",  PW_TYPE_STRING_PTR,
+         0, &hs_srcipaddr,  NULL },
+
        { "response_window", PW_TYPE_INTEGER,
          offsetof(home_server,response_window), NULL,   "30" },
+       { "no_response_fail", PW_TYPE_BOOLEAN,
+         offsetof(home_server,no_response_fail), NULL,   NULL },
        { "max_outstanding", PW_TYPE_INTEGER,
          offsetof(home_server,max_outstanding), NULL,   "65536" },
+       { "require_message_authenticator",  PW_TYPE_BOOLEAN,
+         offsetof(home_server, message_authenticator), 0, NULL },
 
        { "zombie_period", PW_TYPE_INTEGER,
          offsetof(home_server,zombie_period), NULL,   "40" },
        { "status_check", PW_TYPE_STRING_PTR,
          0, &hs_check,   "none" },
        { "ping_check", PW_TYPE_STRING_PTR,
-         0, &hs_check,   "none" },
+         0, &hs_check,   NULL },
 
        { "ping_interval", PW_TYPE_INTEGER,
          offsetof(home_server,ping_interval), NULL,   "30" },
@@ -247,16 +373,41 @@ static CONF_PARSER home_server_config[] = {
        { "password",  PW_TYPE_STRING_PTR,
          offsetof(home_server,ping_user_password), NULL,  NULL},
 
-       { NULL, -1, 0, NULL, NULL }             /* end the list */
+#ifdef WITH_STATS
+       { "historic_average_window", PW_TYPE_INTEGER,
+         offsetof(home_server,ema.window), NULL,  NULL },
+#endif
+
+#ifdef WITH_COA
+       { "irt",  PW_TYPE_INTEGER,
+         offsetof(home_server, coa_irt), 0, Stringify(2) },
+       { "mrt",  PW_TYPE_INTEGER,
+         offsetof(home_server, coa_mrt), 0, Stringify(16) },
+       { "mrc",  PW_TYPE_INTEGER,
+         offsetof(home_server, coa_mrc), 0, Stringify(5) },
+       { "mrd",  PW_TYPE_INTEGER,
+         offsetof(home_server, coa_mrd), 0, Stringify(30) },
+#endif
 
+       { "limit", PW_TYPE_SUBSECTION, 0, NULL, (const void *) limit_config },
+
+       { NULL, -1, 0, NULL, NULL }             /* end the list */
 };
 
 
-static int home_server_add(CONF_SECTION *cs, int type)
+static void null_free(UNUSED void *data)
+{
+}
+
+static int home_server_add(realm_config_t *rc, CONF_SECTION *cs, int pool_type)
 {
        const char *name2;
        home_server *home;
        int dual = FALSE;
+       CONF_PAIR *cp;
+
+       free(hs_virtual_server); /* used only for printing during parsing */
+       hs_virtual_server = NULL;
 
        name2 = cf_section_name1(cs);
        if (!name2 || (strcasecmp(name2, "home_server") != 0)) {
@@ -278,21 +429,28 @@ static int home_server_add(CONF_SECTION *cs, int type)
        home->name = name2;
        home->cs = cs;
 
+        /*
+        *      For zombie period calculations.  We want to count
+        *      zombies from the time when the server starts, instead
+        *      of from 1970.
+        */
+       home->last_packet = time(NULL);
+
+       /*
+        *      Authentication servers have a default "no_response_fail = 0".
+        *      Accounting servers have a default "no_response_fail = 1".
+        *
+        *      This is because authentication packets are retried, so
+        *      they can fail over to another home server.  Accounting
+        *      packets are not retried, so they cannot fail over, and
+        *      instead should be rejected immediately.
+        */
+       home->no_response_fail = 2;
+
        memset(&hs_ip4addr, 0, sizeof(hs_ip4addr));
        memset(&hs_ip6addr, 0, sizeof(hs_ip6addr));
-       cf_section_parse(cs, home, home_server_config);
-
-       if (!cf_pair_find(cs, "ipaddr") &&
-           !cf_pair_find(cs, "ipv6addr")) {
-               cf_log_err(cf_sectiontoitem(cs),
-                          "No IPv4 or IPv6 address defined for home server %s.",
-                          name2);
-               free(home);
-               free(hs_type);
-               hs_type = NULL;
-               free(hs_check);
-               hs_check = NULL;
-               return 0;
+       if (cf_section_parse(cs, home, home_server_config) < 0) {
+               goto error;
        }
 
        /*
@@ -306,15 +464,46 @@ static int home_server_add(CONF_SECTION *cs, int type)
                home->ipaddr.af = AF_INET6;
                home->ipaddr.ipaddr.ip6addr = hs_ip6addr;
 
+       } else if ((cp = cf_pair_find(cs, "virtual_server")) != NULL) {
+               home->ipaddr.af = AF_UNSPEC;
+               home->server = cf_pair_value(cp);
+               if (!home->server) {
+                       cf_log_err(cf_sectiontoitem(cs),
+                                  "Invalid value for virtual_server");
+                       goto error;
+               }
+
+               if (!cf_section_sub_find_name2(rc->cs, "server", home->server)) {
+                 
+                       cf_log_err(cf_sectiontoitem(cs),
+                                  "No such server %s", home->server);
+                       goto error;
+               }
+
+               /*
+                *      When CoA is used, the user has to specify the type
+                *      of the home server, even when they point to
+                *      virtual servers.
+                */
+               home->secret = strdup("");
+               goto skip_port;
+
        } else {
                cf_log_err(cf_sectiontoitem(cs),
-                          "Internal sanity check failed for home server %s.",
+                          "No ipaddr, ipv6addr, or virtual_server defined for home server \"%s\".",
                           name2);
+       error:
                free(home);
                free(hs_type);
                hs_type = NULL;
                free(hs_check);
                hs_check = NULL;
+               free(hs_srcipaddr);
+               hs_srcipaddr = NULL;
+#ifdef WITH_TCP
+               free(hs_proto);
+               hs_proto = NULL;
+#endif
                return 0;
        }
 
@@ -322,77 +511,72 @@ static int home_server_add(CONF_SECTION *cs, int type)
                cf_log_err(cf_sectiontoitem(cs),
                           "No port, or invalid port defined for home server %s.",
                           name2);
-               free(home);
-               free(hs_type);
-               hs_type = NULL;
-               free(hs_check);
-               hs_check = NULL;
-               return 0;
+               goto error;
        }
 
        if (0) {
                cf_log_err(cf_sectiontoitem(cs),
                           "Fatal error!  Home server %s is ourselves!",
                           name2);
-               free(home);
-               free(hs_type);
-               hs_type = NULL;
-               free(hs_check);
-               hs_check = NULL;
-               return 0;
+               goto error;
+       }
+
+       if (!home->secret) {
+               cf_log_err(cf_sectiontoitem(cs),
+                          "No shared secret defined for home server %s.",
+                          name2);
+               goto error;
        }
 
        /*
         *      Use a reasonable default.
         */
+ skip_port:
        if (!hs_type) hs_type = strdup("auth+acct");
 
        if (strcasecmp(hs_type, "auth") == 0) {
                home->type = HOME_TYPE_AUTH;
-               if (type != home->type) {
+               if (home->no_response_fail == 2) home->no_response_fail = 0;
+               if (pool_type != home->type) {
+               mismatch:
                        cf_log_err(cf_sectiontoitem(cs),
-                                  "Server pool of \"acct\" servers cannot include home server %s of type \"auth\"",
-                                  name2);
-                       free(home);
-                       return 0;
+                                  "Home server %s of unexpected type \"%s\"",
+                                  name2, hs_type);
+                       goto error;
                }
 
        } else if (strcasecmp(hs_type, "acct") == 0) {
                home->type = HOME_TYPE_ACCT;
-               if (type != home->type) {
-                       cf_log_err(cf_sectiontoitem(cs),
-                                  "Server pool of \"auth\" servers cannot include home server %s of type \"acct\"",
-                                  name2);
-                       free(home);
-                       return 0;
-               }
+               if (home->no_response_fail == 2) home->no_response_fail = 1;
+               if (pool_type != home->type) goto mismatch;
 
        } else if (strcasecmp(hs_type, "auth+acct") == 0) {
                home->type = HOME_TYPE_AUTH;
                dual = TRUE;
 
+#ifdef WITH_COA
+       } else if (strcasecmp(hs_type, "coa") == 0) {
+               home->type = HOME_TYPE_COA;
+               dual = FALSE;
+
+               if (pool_type != home->type) goto mismatch;
+
+               if (home->server != NULL) {
+                       cf_log_err(cf_sectiontoitem(cs),
+                                  "Home servers of type \"coa\" cannot point to a virtual server");
+                       goto error;
+               }
+#endif
+
        } else {
                cf_log_err(cf_sectiontoitem(cs),
                           "Invalid type \"%s\" for home server %s.",
                           hs_type, name2);
-               free(home);
-               free(hs_type);
-               hs_type = NULL;
-               free(hs_check);
-               hs_check = NULL;
-               return 0;
+               goto error;
        }
        free(hs_type);
        hs_type = NULL;
 
-       if (!home->secret) {
-               cf_log_err(cf_sectiontoitem(cs),
-                          "No shared secret defined for home server %s.",
-                          name2);
-               free(home);
-               return 0;
-       }
-
        if (!hs_check || (strcasecmp(hs_check, "none") == 0)) {
                home->ping_check = HOME_PING_CHECK_NONE;
 
@@ -406,10 +590,7 @@ static int home_server_add(CONF_SECTION *cs, int type)
                cf_log_err(cf_sectiontoitem(cs),
                           "Invalid ping_check \"%s\" for home server %s.",
                           hs_check, name2);
-               free(home);
-               free(hs_check);
-               hs_check = NULL;
-               return 0;
+               goto error;
        }
        free(hs_check);
        hs_check = NULL;
@@ -418,42 +599,99 @@ static int home_server_add(CONF_SECTION *cs, int type)
            (home->ping_check != HOME_PING_CHECK_STATUS_SERVER)) {
                if (!home->ping_user_name) {
                        cf_log_err(cf_sectiontoitem(cs), "You must supply a user name to enable ping checks");
-                       free(home);
-                       return 0;
+                       goto error;
                }
 
                if ((home->type == HOME_TYPE_AUTH) &&
                    !home->ping_user_password) {
                        cf_log_err(cf_sectiontoitem(cs), "You must supply a password to enable ping checks");
-                       free(home);
-                       return 0;
+                       goto error;
                }
        }
 
-       if (rbtree_finddata(home_servers_byaddr, home)) {
-               DEBUG2("Ignoring duplicate home server %s.", name2);
-               return 1;
+       home->proto = IPPROTO_UDP;
+#ifdef WITH_TCP
+       if (hs_proto) {
+               if (strcmp(hs_proto, "udp") == 0) {
+                       free(hs_proto);
+                       hs_proto = NULL;
+                       
+               } else if (strcmp(hs_proto, "tcp") == 0) {
+                       free(hs_proto);
+                       hs_proto = NULL;
+                       home->proto = IPPROTO_TCP;
+                       
+               } else {
+                       cf_log_err(cf_sectiontoitem(cs),
+                                  "Unknown proto \"%s\".", hs_proto);
+                       goto error;
+               }
+       }
+#endif
+
+       if (!home->server &&
+           rbtree_finddata(home_servers_byaddr, home)) {
+               cf_log_err(cf_sectiontoitem(cs), "Duplicate home server");
+               goto error;
+       }
+
+       /*
+        *      If the home is a virtual server, don't look up source IP.
+        */
+       if (!home->server) {
+               rad_assert(home->ipaddr.af != AF_UNSPEC);
+
+               /*
+                *      Otherwise look up the source IP using the same
+                *      address family as the destination IP.
+                */
+               if (hs_srcipaddr) {
+                       if (ip_hton(hs_srcipaddr, home->ipaddr.af, &home->src_ipaddr) < 0) {
+                               cf_log_err(cf_sectiontoitem(cs), "Failed parsing src_ipaddr");
+                               goto error;
+                       }
+                       
+               } else {
+                       /*
+                        *      Source isn't specified: Source is
+                        *      the correct address family, but all zeros.
+                        */
+                       home->src_ipaddr.af = home->ipaddr.af;
+               }
        }
 
+       free(hs_srcipaddr);
+       hs_srcipaddr = NULL;
+
        if (!rbtree_insert(home_servers_byname, home)) {
                cf_log_err(cf_sectiontoitem(cs),
-                          "Internal error adding home server %s.",
-                          name2);
-               free(home);
-               return 0;
+                          "Internal error %d adding home server %s.",
+                          __LINE__, name2);
+               goto error;
        }
 
-       if (!rbtree_insert(home_servers_byaddr, home)) {
+       if (!home->server &&
+           !rbtree_insert(home_servers_byaddr, home)) {
                rbtree_deletebydata(home_servers_byname, home);
                cf_log_err(cf_sectiontoitem(cs),
-                          "Internal error adding home server %s.",
-                          name2);
-               free(home);
-               return 0;
+                          "Internal error %d adding home server %s.",
+                          __LINE__, name2);
+               goto error;
        }
 
-       if (home->response_window < 5) home->response_window = 5;
-       if (home->response_window > 60) home->response_window = 60;
+#ifdef WITH_STATS
+       home->number = home_server_max_number++;
+       if (!rbtree_insert(home_servers_bynumber, home)) {
+               rbtree_deletebydata(home_servers_byname, home);
+               if (home->ipaddr.af != AF_UNSPEC) {
+                       rbtree_deletebydata(home_servers_byname, home);
+               }
+               cf_log_err(cf_sectiontoitem(cs),
+                          "Internal error %d adding home server %s.",
+                          __LINE__, name2);
+               goto error;
+       }
+#endif
 
        if (home->max_outstanding < 8) home->max_outstanding = 8;
        if (home->max_outstanding > 65536*16) home->max_outstanding = 65536*16;
@@ -461,7 +699,10 @@ static int home_server_add(CONF_SECTION *cs, int type)
        if (home->ping_interval < 6) home->ping_interval = 6;
        if (home->ping_interval > 120) home->ping_interval = 120;
 
-       if (home->zombie_period < 20) home->zombie_period = 20;
+       if (home->response_window < 1) home->response_window = 1;
+       if (home->response_window > 60) home->response_window = 60;
+
+       if (home->zombie_period < 1) home->zombie_period = 1;
        if (home->zombie_period > 120) home->zombie_period = 120;
 
        if (home->zombie_period < home->response_window) {
@@ -477,6 +718,36 @@ static int home_server_add(CONF_SECTION *cs, int type)
        if (home->revive_interval < 60) home->revive_interval = 60;
        if (home->revive_interval > 3600) home->revive_interval = 3600;
 
+#ifdef WITH_COA
+       if (home->coa_irt < 1) home->coa_irt = 1;
+       if (home->coa_irt > 5) home->coa_irt = 5;
+
+       if (home->coa_mrc < 0) home->coa_mrc = 0;
+       if (home->coa_mrc > 20 ) home->coa_mrc = 20;
+
+       if (home->coa_mrt < 0) home->coa_mrt = 0;
+       if (home->coa_mrt > 30 ) home->coa_mrt = 30;
+
+       if (home->coa_mrd < 5) home->coa_mrd = 5;
+       if (home->coa_mrd > 60 ) home->coa_mrd = 60;
+#endif
+
+       if (home->max_connections > 1024) home->max_connections = 1024;
+
+#ifdef WITH_TCP
+       /*
+        *      UDP sockets can't be connection limited.
+        */
+       if (home->proto != IPPROTO_TCP) home->max_connections = 0;
+#endif
+
+       if ((home->idle_timeout > 0) && (home->idle_timeout < 5))
+               home->idle_timeout = 5;
+       if ((home->lifetime > 0) && (home->lifetime < 5))
+               home->lifetime = 5;
+       if ((home->lifetime > 0) && (home->idle_timeout > home->lifetime))
+               home->idle_timeout = 0;
+
        if (dual) {
                home_server *home2 = rad_malloc(sizeof(*home2));
 
@@ -487,24 +758,48 @@ static int home_server_add(CONF_SECTION *cs, int type)
                home2->ping_user_password = NULL;
                home2->cs = cs;
 
+               if (home->no_response_fail == 2) home->no_response_fail = 0;
+               if (home2->no_response_fail == 2) home2->no_response_fail = 1;
+
                if (!rbtree_insert(home_servers_byname, home2)) {
                        cf_log_err(cf_sectiontoitem(cs),
-                                  "Internal error adding home server %s.",
-                                  name2);
+                                  "Internal error %d adding home server %s.",
+                                  __LINE__, name2);
                        free(home2);
                        return 0;
                }
                
-               if (!rbtree_insert(home_servers_byaddr, home2)) {
+               if (!home->server &&
+                   !rbtree_insert(home_servers_byaddr, home2)) {
                        rbtree_deletebydata(home_servers_byname, home2);
                        cf_log_err(cf_sectiontoitem(cs),
-                                  "Internal error adding home server %s.",
-                                  name2);
+                                  "Internal error %d adding home server %s.",
+                                  __LINE__, name2);
                        free(home2);
                        return 0;
                }
+
+#ifdef WITH_STATS
+               home2->number = home_server_max_number++;
+               if (!rbtree_insert(home_servers_bynumber, home2)) {
+                       rbtree_deletebydata(home_servers_byname, home2);
+                       if (!home2->server) {
+                               rbtree_deletebydata(home_servers_byname, home2);
+                       }
+                       cf_log_err(cf_sectiontoitem(cs),
+                                  "Internal error %d adding home server %s.",
+                                  __LINE__, name2);
+                       free(home2);
+                       return 0;
+               }
+#endif
        }
 
+       /*
+        *      Mark it as already processed
+        */
+       cf_data_add(cs, "home_server", null_free, null_free);
+
        return 1;
 }
 
@@ -529,6 +824,50 @@ static home_pool_t *server_pool_alloc(const char *name, home_pool_type_t type,
        return pool;
 }
 
+static int pool_check_home_server(realm_config_t *rc, CONF_PAIR *cp,
+                                 const char *name, int server_type,
+                                 home_server **phome)
+{
+       home_server myhome, *home;
+       CONF_SECTION *server_cs;
+
+       if (!name) {
+               cf_log_err(cf_pairtoitem(cp),
+                          "No value given for home_server.");
+               return 0;
+       }
+
+       myhome.name = name;
+       myhome.type = server_type;
+       home = rbtree_finddata(home_servers_byname, &myhome);
+       if (home) {
+               *phome = home;
+               return 1;
+       }
+       
+       server_cs = cf_section_sub_find_name2(rc->cs, "home_server", name);
+       if (!server_cs) {
+               cf_log_err(cf_pairtoitem(cp),
+                          "Unknown home_server \"%s\".", name);
+               return 0;
+       }
+       
+       if (!home_server_add(rc, server_cs, server_type)) {
+               return 0;
+       }
+       
+       home = rbtree_finddata(home_servers_byname, &myhome);
+       if (!home) {
+               cf_log_err(cf_pairtoitem(cp),
+                          "Internal error %d adding home server \"%s\".",
+                          __LINE__, name);
+               return 0;
+       }
+
+       *phome = home;
+       return 1;
+}
+
 
 static int server_pool_add(realm_config_t *rc,
                           CONF_SECTION *cs, int server_type, int do_print)
@@ -538,6 +877,7 @@ static int server_pool_add(realm_config_t *rc,
        const char *value;
        CONF_PAIR *cp;
        int num_home_servers;
+       home_server *home;
 
        name2 = cf_section_name1(cs);
        if (!name2 || ((strcasecmp(name2, "server_pool") != 0) &&
@@ -548,54 +888,23 @@ static int server_pool_add(realm_config_t *rc,
        }
 
        name2 = cf_section_name2(cs);
-       if (!name2) {
-               cf_log_err(cf_sectiontoitem(cs),
-                          "Server pool section is missing a name.");
-               return 0;
-       }
-
-       /*
-        *      Count the home servers and initalize them.
-        */
-       num_home_servers = 0;
-       for (cp = cf_pair_find(cs, "home_server");
-            cp != NULL;
-            cp = cf_pair_find_next(cs, cp, "home_server")) {
-               home_server myhome, *home;
-               CONF_SECTION *server_cs;
-
-               num_home_servers++;
-
-               value = cf_pair_value(cp);
-               if (!value) {
-                       cf_log_err(cf_pairtoitem(cp),
-                                  "No value given for home_server.");
-                       return 0;;
-               }
-
-               myhome.name = value;
-               myhome.type = server_type;
-               home = rbtree_finddata(home_servers_byname, &myhome);
-               if (home) continue;
-
-               server_cs = cf_section_sub_find_name2(rc->cs,
-                                                     "home_server",
-                                                     value);
-               if (!server_cs) {
-                       cf_log_err(cf_pairtoitem(cp),
-                                  "Unknown home_server \"%s\".",
-                                  value);
-                       return 0;
-               }
+       if (!name2) {
+               cf_log_err(cf_sectiontoitem(cs),
+                          "Server pool section is missing a name.");
+               return 0;
+       }
 
-               if (!home_server_add(server_cs, server_type)) {
-                       return 0;
-               }
+       /*
+        *      Count the home servers and initalize them.
+        */
+       num_home_servers = 0;
+       for (cp = cf_pair_find(cs, "home_server");
+            cp != NULL;
+            cp = cf_pair_find_next(cs, cp, "home_server")) {
+               num_home_servers++;
 
-               home = rbtree_finddata(home_servers_byname, &myhome);
-               if (!home) {
-                       radlog(L_ERR, "Internal sanity check failed %d",
-                              __LINE__);
+               if (!pool_check_home_server(rc, cp, cf_pair_value(cp),
+                                           server_type, &home)) {
                        return 0;
                }
        }
@@ -611,6 +920,32 @@ static int server_pool_add(realm_config_t *rc,
                                 num_home_servers);
        pool->cs = cs;
 
+
+       /*
+        *      Fallback servers must be defined, and must be
+        *      virtual servers.
+        */
+       cp = cf_pair_find(cs, "fallback");
+       if (cp) {
+#ifdef WITH_COA
+               if (server_type == HOME_TYPE_COA) {
+                       cf_log_err(cf_sectiontoitem(cs), "Home server pools of type \"coa\" cannot have a fallback virtual server.");
+                       goto error;
+               }
+#endif
+
+               if (!pool_check_home_server(rc, cp, cf_pair_value(cp),
+                                           server_type, &pool->fallback)) {
+                       
+                       goto error;
+               }
+
+               if (!pool->fallback->server) {
+                       cf_log_err(cf_sectiontoitem(cs), "Fallback home_server %s does NOT contain a virtual_server directive.", pool->fallback->name);
+                       goto error;
+               }
+       }
+
        if (do_print) cf_log_info(cs, " home_server_pool %s {", name2);
 
        cp = cf_pair_find(cs, "type");
@@ -646,8 +981,13 @@ static int server_pool_add(realm_config_t *rc,
 
        cp = cf_pair_find(cs, "virtual_server");
        if (cp) {
-               pool->virtual_server = cf_pair_value(cp);
-               if (do_print && pool->virtual_server) {
+               pool->virtual_server = cf_pair_value(cp);               
+               if (!pool->virtual_server) {
+                       cf_log_err(cf_pairtoitem(cp), "No value given for virtual_server");
+                       goto error;
+               }
+
+               if (do_print) {
                        cf_log_info(cs, "\tvirtual_server = %s", pool->virtual_server);
                }
 
@@ -664,15 +1004,11 @@ static int server_pool_add(realm_config_t *rc,
        for (cp = cf_pair_find(cs, "home_server");
             cp != NULL;
             cp = cf_pair_find_next(cs, cp, "home_server")) {
-               home_server myhome, *home;
+               home_server myhome;
 
                value = cf_pair_value(cp);
-               if (!value) {
-                       cf_log_err(cf_pairtoitem(cp),
-                                  "No value given for home_server.");
-                       goto error;
-               }
 
+               memset(&myhome, 0, sizeof(&myhome));
                myhome.name = value;
                myhome.type = server_type;
 
@@ -691,6 +1027,10 @@ static int server_pool_add(realm_config_t *rc,
                pool->servers[num_home_servers++] = home;
        } /* loop over home_server's */
 
+       if (pool->fallback && do_print) {
+               cf_log_info(cs, "\tfallback = %s", pool->fallback->name);
+       }
+
        if (!rbtree_insert(home_pools_byname, pool)) {
                rad_assert("Internal sanity check failed");
                goto error;
@@ -698,6 +1038,8 @@ static int server_pool_add(realm_config_t *rc,
 
        if (do_print) cf_log_info(cs, " }");
 
+       cf_data_add(cs, "home_server_pool", pool, free);
+
        rad_assert(pool->server_type != 0);
 
        return 1;
@@ -707,18 +1049,27 @@ static int server_pool_add(realm_config_t *rc,
        free(pool);
        return 0;
 }
-
+#endif
 
 static int old_server_add(realm_config_t *rc, CONF_SECTION *cs,
                          const char *realm,
                          const char *name, const char *secret,
                          home_pool_type_t ldflag, home_pool_t **pool_p,
-                         int type)
+                         int type, const char *server)
 {
+#ifdef WITH_PROXY
        int i, insert_point, num_home_servers;
        home_server myhome, *home;
        home_pool_t mypool, *pool;
        CONF_SECTION *subcs;
+#else
+       rc = rc;                /* -Wunused */
+       realm = realm;
+       secret = secret;
+       ldflag = ldflag;
+       type = type;
+       server = server;
+#endif
 
        /*
         *      LOCAL realms get sanity checked, and nothing else happens.
@@ -731,6 +1082,10 @@ static int old_server_add(realm_config_t *rc, CONF_SECTION *cs,
                return 1;
        }
 
+#ifndef WITH_PROXY
+       return 0;               /* Not proxying.  Can't do non-LOCAL realms */
+
+#else
        mypool.name = realm;
        mypool.server_type = type;
        pool = rbtree_finddata(home_pools_byname, &mypool);
@@ -750,7 +1105,7 @@ static int old_server_add(realm_config_t *rc, CONF_SECTION *cs,
        myhome.type = type;
        home = rbtree_finddata(home_servers_byname, &myhome);
        if (home) {
-               if (strcmp(home->secret, secret) != 0) {
+               if (secret && (strcmp(home->secret, secret) != 0)) {
                        cf_log_err(cf_sectiontoitem(cs), "Inconsistent shared secret for home server \"%s\"", name);
                        return 0;
                }
@@ -811,6 +1166,7 @@ static int old_server_add(realm_config_t *rc, CONF_SECTION *cs,
                home->type = type;
                home->secret = secret;
                home->cs = cs;
+               home->proto = IPPROTO_UDP;
 
                p = strchr(name, ':');
                if (!p) {
@@ -846,13 +1202,19 @@ static int old_server_add(realm_config_t *rc, CONF_SECTION *cs,
                        p = q;
                }
 
-               if (ip_hton(p, AF_UNSPEC, &home->ipaddr) < 0) {
-                       cf_log_err(cf_sectiontoitem(cs),
-                                  "Failed looking up hostname %s.",
-                                  p);
-                       free(home);
-                       free(q);
-                       return 0;
+               if (!server) {
+                       if (ip_hton(p, AF_UNSPEC, &home->ipaddr) < 0) {
+                               cf_log_err(cf_sectiontoitem(cs),
+                                          "Failed looking up hostname %s.",
+                                          p);
+                               free(home);
+                               free(q);
+                               return 0;
+                       }
+                       home->src_ipaddr.af = home->ipaddr.af;
+               } else {
+                       home->ipaddr.af = AF_UNSPEC;
+                       home->server = server;
                }
                free(q);
 
@@ -875,17 +1237,32 @@ static int old_server_add(realm_config_t *rc, CONF_SECTION *cs,
                }
 
                if (!rbtree_insert(home_servers_byname, home)) {
-                       cf_log_err(cf_sectiontoitem(cs), "Internal error adding home server %s.", name);
+                       cf_log_err(cf_sectiontoitem(cs), "Internal error %d adding home server %s.", __LINE__, name);
                        free(home);
                        return 0;
                }
 
                if (!rbtree_insert(home_servers_byaddr, home)) {
                        rbtree_deletebydata(home_servers_byname, home);
-                       cf_log_err(cf_sectiontoitem(cs), "Internal error adding home server %s.", name);
+                       cf_log_err(cf_sectiontoitem(cs), "Internal error %d adding home server %s.", __LINE__, name);
+                       free(home);
+                       return 0;
+               }
+
+#ifdef WITH_STATS
+               home->number = home_server_max_number++;
+               if (!rbtree_insert(home_servers_bynumber, home)) {
+                       rbtree_deletebydata(home_servers_byname, home);
+                       if (home->ipaddr.af != AF_UNSPEC) {
+                               rbtree_deletebydata(home_servers_byname, home);
+                       }
+                       cf_log_err(cf_sectiontoitem(cs),
+                                  "Internal error %d adding home server %s.",
+                                  __LINE__, name);
                        free(home);
                        return 0;
                }
+#endif
        }
 
        /*
@@ -933,6 +1310,7 @@ static int old_server_add(realm_config_t *rc, CONF_SECTION *cs,
        *pool_p = pool;
 
        return 1;
+#endif
 }
 
 static int old_realm_config(realm_config_t *rc, CONF_SECTION *cs, REALM *r)
@@ -993,7 +1371,7 @@ static int old_realm_config(realm_config_t *rc, CONF_SECTION *cs, REALM *r)
                cf_log_info(cs, "\tauthhost = %s",  host);
 
                if (!old_server_add(rc, cs, r->name, host, secret, ldflag,
-                                   &r->auth_pool, HOME_TYPE_AUTH)) {
+                                   &r->auth_pool, HOME_TYPE_AUTH, NULL)) {
                        return 0;
                }
        }
@@ -1027,7 +1405,27 @@ static int old_realm_config(realm_config_t *rc, CONF_SECTION *cs, REALM *r)
                cf_log_info(cs, "\taccthost = %s", host);
 
                if (!old_server_add(rc, cs, r->name, host, secret, ldflag,
-                                   &r->acct_pool, HOME_TYPE_ACCT)) {
+                                   &r->acct_pool, HOME_TYPE_ACCT, NULL)) {
+                       return 0;
+               }
+       }
+
+       cp = cf_pair_find(cs, "virtual_server");
+       if (cp) {
+               host = cf_pair_value(cp);
+               if (!host) {
+                       cf_log_err(cf_pairtoitem(cp), "No value specified for virtual_server");
+                       return 0;
+               }
+
+               cf_log_info(cs, "\tvirtual_server = %s", host);
+
+               if (!old_server_add(rc, cs, r->name, host, "", ldflag,
+                                   &r->auth_pool, HOME_TYPE_AUTH, host)) {
+                       return 0;
+               }
+               if (!old_server_add(rc, cs, r->name, host, "", ldflag,
+                                   &r->acct_pool, HOME_TYPE_ACCT, host)) {
                        return 0;
                }
        }
@@ -1039,6 +1437,7 @@ static int old_realm_config(realm_config_t *rc, CONF_SECTION *cs, REALM *r)
 }
 
 
+#ifdef WITH_PROXY
 static int add_pool_to_realm(realm_config_t *rc, CONF_SECTION *cs,
                             const char *name, home_pool_t **dest,
                             int server_type, int do_print)
@@ -1085,14 +1484,18 @@ static int add_pool_to_realm(realm_config_t *rc, CONF_SECTION *cs,
 
        return 1;
 }
+#endif
+
 
 static int realm_add(realm_config_t *rc, CONF_SECTION *cs)
 {
        const char *name2;
        REALM *r = NULL;
        CONF_PAIR *cp;
+#ifdef WITH_PROXY
        home_pool_t *auth_pool, *acct_pool;
        const char *auth_pool_name, *acct_pool_name;
+#endif
 
        name2 = cf_section_name1(cs);
        if (!name2 || (strcasecmp(name2, "realm") != 0)) {
@@ -1106,6 +1509,7 @@ static int realm_add(realm_config_t *rc, CONF_SECTION *cs)
                return 0;
        }
 
+#ifdef WITH_PROXY
        auth_pool = acct_pool = NULL;
        auth_pool_name = acct_pool_name = NULL;
 
@@ -1164,15 +1568,17 @@ static int realm_add(realm_config_t *rc, CONF_SECTION *cs)
                        return 0;
                }
        }
+#endif
 
        cf_log_info(cs, " realm %s {", name2);
 
+#ifdef WITH_PROXY
        /*
         *      The realm MAY already exist if it's an old-style realm.
         *      In that case, merge the old-style realm with this one.
         */
-       r = realm_find(name2);
-       if (r) {
+       r = realm_find2(name2);
+       if (r && (strcmp(r->name, name2) == 0)) {
                if (cf_pair_find(cs, "auth_pool") ||
                    cf_pair_find(cs, "acct_pool")) {
                        cf_log_err(cf_sectiontoitem(cs), "Duplicate realm \"%s\"", name2);
@@ -1186,15 +1592,41 @@ static int realm_add(realm_config_t *rc, CONF_SECTION *cs)
                cf_log_info(cs, " } # realm %s", name2);
                return 1;
        }
+#endif
+
+#ifdef HAVE_REGEX_H
+       if (name2[0] == '~') {
+               int rcode;
+               regex_t reg;
+               
+               /*
+                *      Include substring matches.
+                */
+               rcode = regcomp(&reg, name2 + 1,
+                               REG_EXTENDED | REG_NOSUB | REG_ICASE);
+               if (rcode != 0) {
+                       char buffer[256];
+
+                       regerror(rcode, &reg, buffer, sizeof(buffer));
+
+                       cf_log_err(cf_sectiontoitem(cs),
+                                  "Invalid regex \"%s\": %s",
+                                  name2 + 1, buffer);
+                       goto error;
+               }
+               regfree(&reg);
+       }
+#endif
 
        r = rad_malloc(sizeof(*r));
        memset(r, 0, sizeof(*r));
 
        r->name = name2;
+       r->striprealm = 1;
+#ifdef WITH_PROXY
        r->auth_pool = auth_pool;
        r->acct_pool = acct_pool;
-       r->striprealm = 1;
-
+       
        if (auth_pool_name &&
            (auth_pool_name == acct_pool_name)) { /* yes, ptr comparison */
                cf_log_info(cs, "\tpool = %s", auth_pool_name);
@@ -1202,6 +1634,7 @@ static int realm_add(realm_config_t *rc, CONF_SECTION *cs)
                if (auth_pool_name) cf_log_info(cs, "\tauth_pool = %s", auth_pool_name);
                if (acct_pool_name) cf_log_info(cs, "\tacct_pool = %s", acct_pool_name);
        }
+#endif
 
        cp = cf_pair_find(cs, "nostrip");
        if (cp && (cf_pair_value(cp) == NULL)) {
@@ -1231,6 +1664,29 @@ static int realm_add(realm_config_t *rc, CONF_SECTION *cs)
                goto error;
        }
 
+#ifdef HAVE_REGEX_H
+       /*
+        *      It's a regex.  Add it to a separate list.
+        */
+       if (name2[0] == '~') {
+               realm_regex_t *rr, **last;
+
+               rr = rad_malloc(sizeof(*rr));
+               
+               last = &realms_regex;
+               while (*last) last = &((*last)->next);  /* O(N^2)... sue me. */
+
+               r->name = name2;
+               rr->realm = r;
+               rr->next = NULL;
+
+               *last = rr;
+
+               cf_log_info(cs, " }");
+               return 1;
+       }
+#endif
+
        if (!rbtree_insert(realms_byname, r)) {
                rad_assert("Internal sanity check failed");
                goto error;
@@ -1246,6 +1702,61 @@ static int realm_add(realm_config_t *rc, CONF_SECTION *cs)
        return 0;
 }
 
+#ifdef WITH_COA
+static const FR_NAME_NUMBER home_server_types[] = {
+       { "auth", HOME_TYPE_AUTH },
+       { "auth+acct", HOME_TYPE_AUTH },
+       { "acct", HOME_TYPE_ACCT },
+       { "coa", HOME_TYPE_COA },
+       { NULL, 0 }
+};
+
+static int pool_peek_type(CONF_SECTION *config, CONF_SECTION *cs)
+{
+       int home;
+       const char *name, *type;
+       CONF_PAIR *cp;
+       CONF_SECTION *server_cs;
+
+       cp = cf_pair_find(cs, "home_server");
+       if (!cp) {
+               cf_log_err(cf_sectiontoitem(cs), "Pool does not contain a \"home_server\" entry");
+               return HOME_TYPE_INVALID;
+       }
+
+       name = cf_pair_value(cp);
+       if (!name) {
+               cf_log_err(cf_pairtoitem(cp), "home_server entry does not reference a home server");
+               return HOME_TYPE_INVALID;
+       }
+
+       server_cs = cf_section_sub_find_name2(config, "home_server", name);
+       if (!server_cs) {
+               cf_log_err(cf_pairtoitem(cp), "home_server \"%s\" does not exist", name);
+               return HOME_TYPE_INVALID;
+       }
+
+       cp = cf_pair_find(server_cs, "type");
+       if (!cp) {
+               cf_log_err(cf_sectiontoitem(server_cs), "home_server %s does not contain a \"type\" entry", name);
+               return HOME_TYPE_INVALID;
+       }
+
+       type = cf_pair_value(cp);
+       if (!type) {
+               cf_log_err(cf_sectiontoitem(server_cs), "home_server %s contains an empty \"type\" entry", name);
+               return HOME_TYPE_INVALID;
+       }
+
+       home = fr_str2int(home_server_types, type, HOME_TYPE_INVALID);
+       if (home == HOME_TYPE_INVALID) {
+               cf_log_err(cf_sectiontoitem(server_cs), "home_server %s contains an invalid \"type\" entry of value \"%s\"", name, type);
+               return HOME_TYPE_INVALID;
+       }
+
+       return home;            /* 'cause we miss it so much */
+}
+#endif
 
 int realms_init(CONF_SECTION *config)
 {
@@ -1260,6 +1771,7 @@ int realms_init(CONF_SECTION *config)
                return 0;
        }
 
+#ifdef WITH_PROXY
        home_servers_byaddr = rbtree_create(home_server_addr_cmp, free, 0);
        if (!home_servers_byaddr) {
                realms_free();
@@ -1272,16 +1784,26 @@ int realms_init(CONF_SECTION *config)
                return 0;
        }
 
-       home_pools_byname = rbtree_create(home_pool_name_cmp, free, 0);
+#ifdef WITH_STATS
+       home_servers_bynumber = rbtree_create(home_server_number_cmp, NULL, 0);
+       if (!home_servers_bynumber) {
+               realms_free();
+               return 0;
+       }
+#endif
+
+       home_pools_byname = rbtree_create(home_pool_name_cmp, NULL, 0);
        if (!home_pools_byname) {
                realms_free();
                return 0;
        }
+#endif
 
        rc = rad_malloc(sizeof(*rc));
        memset(rc, 0, sizeof(*rc));
        rc->cs = config;
 
+#ifdef WITH_PROXY
        cs = cf_subsection_find_next(config, NULL, "proxy");
        if (cs) {
                cf_section_parse(cs, rc, proxy_config);
@@ -1292,6 +1814,7 @@ int realms_init(CONF_SECTION *config)
                rc->fallback = 0;
                rc->wake_all_if_all_dead= 0;
        }
+#endif
 
        for (cs = cf_subsection_find_next(config, NULL, "realm");
             cs != NULL;
@@ -1303,8 +1826,50 @@ int realms_init(CONF_SECTION *config)
                }
        }
 
+#ifdef WITH_COA
+       /*
+        *      CoA pools aren't tied to realms.
+        */
+       for (cs = cf_subsection_find_next(config, NULL, "home_server_pool");
+            cs != NULL;
+            cs = cf_subsection_find_next(config, cs, "home_server_pool")) {
+               int type;
+
+               /*
+                *      Pool was already loaded.
+                */
+               if (cf_data_find(cs, "home_server_pool")) continue;
+
+               type = pool_peek_type(config, cs);
+               if (type == HOME_TYPE_INVALID) return 0;
+
+               if (!server_pool_add(rc, cs, type, TRUE)) {
+                       return 0;
+               }
+       }
+
+       /*
+        *      CoA home servers aren't tied to realms.
+        */
+       for (cs = cf_subsection_find_next(config, NULL, "home_server");
+            cs != NULL;
+            cs = cf_subsection_find_next(config, cs, "home_server")) {
+               /*
+                *      Server was already loaded.
+                */
+               if (cf_data_find(cs, "home_server")) continue;
+
+               if (!home_server_add(rc, cs, HOME_TYPE_COA)) {
+                       return 0;
+               }
+       }
+#endif
+
+
+#ifdef WITH_PROXY
        xlat_register("home_server", xlat_home_server, NULL);
        xlat_register("home_server_pool", xlat_server_pool, NULL);
+#endif
 
        /*
         *      Swap pointers atomically.
@@ -1316,6 +1881,39 @@ int realms_init(CONF_SECTION *config)
        return 1;
 }
 
+/*
+ *     Find a realm where "name" might be the regex.
+ */
+REALM *realm_find2(const char *name)
+{
+       REALM myrealm;
+       REALM *realm;
+       
+       if (!name) name = "NULL";
+
+       myrealm.name = name;
+       realm = rbtree_finddata(realms_byname, &myrealm);
+       if (realm) return realm;
+
+#ifdef HAVE_REGEX_H
+       if (realms_regex) {
+               realm_regex_t *this;
+
+               for (this = realms_regex; this != NULL; this = this->next) {
+                       if (strcmp(this->realm->name, name) == 0) {
+                               return this->realm;
+                       }
+               }
+       }
+#endif
+
+       /*
+        *      Couldn't find a realm.  Look for DEFAULT.
+        */
+       myrealm.name = "DEFAULT";
+       return rbtree_finddata(realms_byname, &myrealm);
+}
+
 
 /*
  *     Find a realm in the REALM list.
@@ -1323,24 +1921,56 @@ int realms_init(CONF_SECTION *config)
 REALM *realm_find(const char *name)
 {
        REALM myrealm;
-
+       REALM *realm;
+       
        if (!name) name = "NULL";
 
        myrealm.name = name;
+       realm = rbtree_finddata(realms_byname, &myrealm);
+       if (realm) return realm;
+
+#ifdef HAVE_REGEX_H
+       if (realms_regex) {
+               realm_regex_t *this;
+
+               for (this = realms_regex; this != NULL; this = this->next) {
+                       int compare;
+                       regex_t reg;
+
+                       /*
+                        *      Include substring matches.
+                        */
+                       if (regcomp(&reg, this->realm->name + 1,
+                                   REG_EXTENDED | REG_NOSUB | REG_ICASE) != 0) {
+                               continue;
+                       }
+
+                       compare = regexec(&reg, name, 0, NULL, 0);
+                       regfree(&reg);
+
+                       if (compare == 0) return this->realm;
+               }
+       }
+#endif
+
+       /*
+        *      Couldn't find a realm.  Look for DEFAULT.
+        */
+       myrealm.name = "DEFAULT";
        return rbtree_finddata(realms_byname, &myrealm);
 }
 
 
+#ifdef WITH_PROXY
 home_server *home_server_ldb(const char *realmname,
                             home_pool_t *pool, REQUEST *request)
 {
        int             start;
        int             count;
        home_server     *found = NULL;
+       home_server     *zombie = NULL;
        VALUE_PAIR      *vp;
 
-       start = 0;
-
        /*
         *      Determine how to pick choose the home server.
         */
@@ -1392,7 +2022,7 @@ home_server *home_server_ldb(const char *realmname,
                break;
 
        case HOME_POOL_KEYED_BALANCE:
-               if ((vp = pairfind(request->config_items, PW_LOAD_BALANCE_KEY)) != NULL) {
+               if ((vp = pairfind(request->config_items, PW_LOAD_BALANCE_KEY, 0)) != NULL) {
                        hash = fr_hash(vp->vp_strvalue, vp->length);
                        start = hash % pool->num_home_servers;
                        break;
@@ -1400,11 +2030,14 @@ home_server *home_server_ldb(const char *realmname,
                /* FALL-THROUGH */
                                
        case HOME_POOL_LOAD_BALANCE:
-               found = pool->servers[0];
+       case HOME_POOL_FAIL_OVER:
+               start = 0;
+               break;
 
-       default:
+       default:                /* this shouldn't happen... */
                start = 0;
                break;
+
        }
 
        /*
@@ -1417,6 +2050,11 @@ home_server *home_server_ldb(const char *realmname,
        for (count = 0; count < pool->num_home_servers; count++) {
                home_server *home = pool->servers[(start + count) % pool->num_home_servers];
 
+               if (!home) continue;
+
+               /*
+                *      Skip dead home servers.
+                */
                if (home->state == HOME_STATE_IS_DEAD) {
                        continue;
                }
@@ -1428,20 +2066,56 @@ home_server *home_server_ldb(const char *realmname,
                        continue;
                }
 
+#ifdef WITH_DETAIL
+               /*
+                *      We read the packet from a detail file, AND it
+                *      came from this server.  Don't re-proxy it
+                *      there.
+                */
+               if ((request->listener->type == RAD_LISTEN_DETAIL) &&
+                   (request->packet->code == PW_ACCOUNTING_REQUEST) &&
+                   (fr_ipaddr_cmp(&home->ipaddr, &request->packet->src_ipaddr) == 0)) {
+                       continue;
+               }
+#endif
+
+               /*
+                *      It's zombie, so we remember the first zombie
+                *      we find, but we don't mark it as a "live"
+                *      server.
+                */
+               if (home->state == HOME_STATE_ZOMBIE) {
+                       if (!zombie) zombie = home;
+                       continue;
+               }
+
+               /*
+                *      We've found the first "live" one.  Use that.
+                */
                if (pool->type != HOME_POOL_LOAD_BALANCE) {
-                       return home;
+                       found = home;
+                       break;
+               }
+
+               /*
+                *      Otherwise we're doing some kind of load balancing.
+                *      If we haven't found one yet, pick this one.
+                */
+               if (!found) {
+                       found = home;
+                       continue;
                }
 
-               DEBUG3("PROXY %s %d\t%s %d",
+               RDEBUG3("PROXY %s %d\t%s %d",
                       found->name, found->currently_outstanding,
                       home->name, home->currently_outstanding);
 
                /*
                 *      Prefer this server if it's less busy than the
-                *      one we previously found.
+                *      one we had previously found.
                 */
                if (home->currently_outstanding < found->currently_outstanding) {
-                       DEBUG3("Choosing %s: It's less busy than %s",
+                       RDEBUG3("PROXY Choosing %s: It's less busy than %s",
                               home->name, found->name);
                        found = home;
                        continue;
@@ -1452,20 +2126,7 @@ home_server *home_server_ldb(const char *realmname,
                 *      we found.
                 */
                if (home->currently_outstanding > found->currently_outstanding) {
-                       DEBUG3("Skipping %s: It's busier than %s",
-                              home->name, found->name);
-                       continue;
-               }
-
-               if (home->total_requests_sent < found->total_requests_sent) {
-                       DEBUG3("Choosing %s: It's been less busy than %s",
-                              home->name, found->name);
-                       found = home;
-                       continue;
-               }
-
-               if (home->total_requests_sent > found->total_requests_sent) {
-                       DEBUG3("Skipping %s: It's been busier than %s",
+                       RDEBUG3("PROXY Skipping %s: It's busier than %s",
                               home->name, found->name);
                        continue;
                }
@@ -1477,10 +2138,87 @@ home_server *home_server_ldb(const char *realmname,
                if (((count + 1) * (fr_rand() & 0xffff)) < (uint32_t) 0x10000) {
                        found = home;
                }
-
        } /* loop over the home servers */
 
-       if (found) return found;
+       /*
+        *      We have no live servers, BUT we have a zombie.  Use
+        *      the zombie as a last resort.
+        */
+       if (!found && zombie) {
+               found = zombie;
+               zombie = NULL;
+       }
+
+       /*
+        *      There's a fallback if they're all dead.
+        */
+       if (!found && pool->fallback) {
+               found = pool->fallback;
+       }
+
+       if (found) {
+       update_and_return:
+               /*
+                *      Allocate the proxy packet, only if it wasn't
+                *      already allocated by a module.  This check is
+                *      mainly to support the proxying of EAP-TTLS and
+                *      EAP-PEAP tunneled requests.
+                *
+                *      In those cases, the EAP module creates a
+                *      "fake" request, and recursively passes it
+                *      through the authentication stage of the
+                *      server.  The module then checks if the request
+                *      was supposed to be proxied, and if so, creates
+                *      a proxy packet from the TUNNELED request, and
+                *      not from the EAP request outside of the
+                *      tunnel.
+                *
+                *      The proxy then works like normal, except that
+                *      the response packet is "eaten" by the EAP
+                *      module, and encapsulated into an EAP packet.
+                */
+               if (!request->proxy) {
+                       if ((request->proxy = rad_alloc(TRUE)) == NULL) {
+                               radlog(L_ERR|L_CONS, "no memory");
+                               exit(1);
+                       }
+                       
+                       /*
+                        *      Copy the request, then look up name
+                        *      and plain-text password in the copy.
+                        *
+                        *      Note that the User-Name attribute is
+                        *      the *original* as sent over by the
+                        *      client.  The Stripped-User-Name
+                        *      attribute is the one hacked through
+                        *      the 'hints' file.
+                        */
+                       request->proxy->vps =  paircopy(request->packet->vps);
+               }
+
+               /*
+                *      Update the various fields as appropriate.
+                */
+               request->proxy->src_ipaddr = found->src_ipaddr;
+               request->proxy->src_port = 0;
+               request->proxy->dst_ipaddr = found->ipaddr;
+               request->proxy->dst_port = found->port;
+               request->home_server = found;
+
+               /*
+                *      We're supposed to add a Message-Authenticator
+                *      if it doesn't exist, and it doesn't exist.
+                */
+               if (found->message_authenticator &&
+                   (request->packet->code == PW_AUTHENTICATION_REQUEST) &&
+                   !pairfind(request->proxy->vps, PW_MESSAGE_AUTHENTICATOR, 0)) {
+                       radius_pairmake(request, &request->proxy->vps,
+                                       "Message-Authenticator", "0x00",
+                                       T_OP_SET);
+               }
+
+               return found;
+       }
 
        /*
         *      No live match found, and no fallback to the "DEFAULT"
@@ -1491,19 +2229,19 @@ home_server *home_server_ldb(const char *realmname,
         */
        if (!realm_config->fallback &&
            realm_config->wake_all_if_all_dead) {
-               home_server *lb = NULL;
-
                for (count = 0; count < pool->num_home_servers; count++) {
                        home_server *home = pool->servers[count];
 
+                       if (!home) continue;
+
                        if ((home->state == HOME_STATE_IS_DEAD) &&
                            (home->ping_check == HOME_PING_CHECK_NONE)) {
                                home->state = HOME_STATE_ALIVE;
-                               if (!lb) lb = home;
+                               if (!found) found = home;
                        }
                }
 
-               if (lb) return lb;
+               if (found) goto update_and_return;
        }
 
        /*
@@ -1527,7 +2265,7 @@ home_server *home_server_ldb(const char *realmname,
                }
                if (!pool) return NULL;
 
-               DEBUG2("  Realm %s has no live home servers.  Falling back to the DEFAULT realm.", realmname);
+               RDEBUG2("PROXY - realm %s has no live home servers.  Falling back to the DEFAULT realm.", realmname);
                return home_server_ldb(rd->name, pool, request);
        }
 
@@ -1538,12 +2276,57 @@ home_server *home_server_ldb(const char *realmname,
 }
 
 
-home_server *home_server_find(fr_ipaddr_t *ipaddr, int port)
+home_server *home_server_find(fr_ipaddr_t *ipaddr, int port, int proto)
 {
        home_server myhome;
 
+       memset(&myhome, 0, sizeof(myhome));
        myhome.ipaddr = *ipaddr;
        myhome.port = port;
+#ifdef WITH_TCP
+       myhome.proto = proto;
+#else
+       myhome.proto = IPPROTO_UDP;
+#endif
+       myhome.server = NULL;   /* we're not called for internal proxying */
 
        return rbtree_finddata(home_servers_byaddr, &myhome);
 }
+
+#ifdef WITH_COA
+home_server *home_server_byname(const char *name, int type)
+{
+       home_server myhome;
+
+       memset(&myhome, 0, sizeof(myhome));
+       myhome.type = type;
+       myhome.name = name;
+
+       return rbtree_finddata(home_servers_byname, &myhome);
+}
+#endif
+
+#ifdef WITH_STATS
+home_server *home_server_bynumber(int number)
+{
+       home_server myhome;
+
+       memset(&myhome, 0, sizeof(myhome));
+       myhome.number = number;
+       myhome.server = NULL;   /* we're not called for internal proxying */
+
+       return rbtree_finddata(home_servers_bynumber, &myhome);
+}
+#endif
+
+home_pool_t *home_pool_byname(const char *name, int type)
+{
+       home_pool_t mypool;
+       
+       memset(&mypool, 0, sizeof(mypool));
+       mypool.name = name;
+       mypool.server_type = type;
+       return rbtree_finddata(home_pools_byname, &mypool);
+}
+
+#endif