[BB#63] conf: Allow multiple Listen statements in the config.

This introduces a list (vector) of addresses instead of
having just one address string.

Signed-off-by: Michael Adam <obnox@samba.org>
(cherry picked from commit e82080a5f6)

src/child.c

@@ -522,9 +522,16 @@ void child_kill_children (int sig)
         }
 }
 
-int child_listening_sock (const char *addr, uint16_t port)
+
+/**
+ * Listen on the various configured interfaces
+ */
+int child_listening_sockets(vector_t listen_addrs, uint16_t port)
 {
         int ret;
+        ssize_t i;
+
+        assert (port > 0);
 
         if (listen_fds == NULL) {
                 listen_fds = vector_create();
@@ -535,8 +542,34 @@ int child_listening_sock (const char *addr, uint16_t port)
                 }
         }
 
-        ret = listen_sock (addr, port, listen_fds);
-        return ret;
+        if ((listen_addrs == NULL) ||
+            (vector_length(config.listen_addrs) == 0))
+        {
+                /*
+                 * no Listen directive:
+                 * listen on the wildcard address(es)
+                 */
+                ret = listen_sock(NULL, port, listen_fds);
+                return ret;
+        }
+
+        for (i = 0; i < vector_length(config.listen_addrs); i++) {
+                const char *addr;
+
+                addr = (char *)vector_getentry(config.listen_addrs, i, NULL);
+                if (addr == NULL) {
+                        log_message(LOG_WARNING,
+                                    "got NULL from listen_addrs - skipping");
+                        continue;
+                }
+
+                ret = listen_sock(addr, port, listen_fds);
+                if (ret != 0) {
+                        return ret;
+                }
+        }
+
+        return 0;
 }
 
 void child_close_sock (void)

src/child.h

@@ -21,6 +21,8 @@
 #ifndef TINYPROXY_CHILD_H
 #define TINYPROXY_CHILD_H
 
+#include "vector.h"
+
 typedef enum {
         CHILD_MAXCLIENTS,
         CHILD_MAXSPARESERVERS,
@@ -30,7 +32,7 @@ typedef enum {
 } child_config_t;
 
 extern short int child_pool_create (void);
-extern int child_listening_sock (const char *addr, uint16_t port);
+extern int child_listening_sockets (vector_t listen_addrs, uint16_t port);
 extern void child_close_sock (void);
 extern void child_main_loop (void);
 extern void child_kill_children (int sig);

src/conf.c

@@ -288,7 +288,7 @@ static void free_config (struct config_s *conf)
         safefree (conf->stathost);
         safefree (conf->user);
         safefree (conf->group);
-        safefree (conf->ipAddr);
+        vector_delete(conf->listen_addrs);
 #ifdef FILTER_ENABLE
         safefree (conf->filter);
 #endif                          /* FILTER_ENABLE */
@@ -465,8 +465,18 @@ static void initialize_with_defaults (struct config_s *conf,
                 conf->group = safestrdup (defaults->group);
         }
 
-        if (defaults->ipAddr) {
-                conf->ipAddr = safestrdup (defaults->ipAddr);
+        if (defaults->listen_addrs) {
+                ssize_t i;
+
+                conf->listen_addrs = vector_create();
+                for (i=0; i < vector_length(defaults->listen_addrs); i++) {
+                        char *addr;
+                        size_t size;
+                        addr = (char *)vector_getentry(defaults->listen_addrs,
+                                                       i, &size);
+                        vector_append(conf->listen_addrs, addr, size);
+                }
+
         }
 
 #ifdef FILTER_ENABLE
@@ -882,11 +892,26 @@ static HANDLE_FUNC (handle_bind)
 
 static HANDLE_FUNC (handle_listen)
 {
-        int r = set_string_arg (&conf->ipAddr, line, &match[2]);
+        char *arg = get_string_arg (line, &match[2]);
 
-        if (r)
-                return r;
-        log_message (LOG_INFO, "Listening on IP %s", conf->ipAddr);
+        if (arg == NULL) {
+                return -1;
+        }
+
+        if (conf->listen_addrs == NULL) {
+               conf->listen_addrs = vector_create();
+               if (conf->listen_addrs == NULL) {
+                       log_message(LOG_WARNING, "Could not create a list "
+                                   "of listen addresses.");
+                       return -1;
+               }
+        }
+
+        vector_append (conf->listen_addrs, arg, strlen(arg) + 1);
+
+        log_message(LOG_INFO, "Added address [%s] to listen addresses.", arg);
+
+        safefree (arg);
         return 0;
 }
 
@@ -933,6 +958,7 @@ static HANDLE_FUNC (handle_addheader)
 
 /*
  * Log level's strings.
+
  */
 struct log_levels_s {
         const char *string;

src/conf.h

@@ -46,7 +46,7 @@ struct config_s {
         unsigned int quit;      /* boolean */
         char *user;
         char *group;
-        char *ipAddr;
+        vector_t listen_addrs;
 #ifdef FILTER_ENABLE
         char *filter;
         unsigned int filter_url;        /* boolean */

src/main.c

@@ -411,8 +411,8 @@ main (int argc, char **argv)
 #endif /* FILTER_ENABLE */
 
         /* Start listening on the selected port. */
-        if (child_listening_sock (config.ipAddr, config.port) < 0) {
-                fprintf (stderr, "%s: Could not create listening socket.\n",
+        if (child_listening_sockets(config.listen_addrs, config.port) < 0) {
+                fprintf (stderr, "%s: Could not create listening sockets.\n",
                          argv[0]);
                 exit (EX_OSERR);
         }