Implementation of aliases contributed by Paul Donohue <icecast@TopQuark.net>

svn path=/trunk/icecast/; revision=4629

News

+2003-04-23
+    Support aliases
+
 2003-03-09
     Support listening on multiple sockets.
 

conf/icecast.xml

@@ -83,6 +83,14 @@
              be relative to the new root, not the original root -->
 		<logdir>/usr/local/icecast/logs</logdir>
 		<webroot>/usr/local/icecast/web</webroot>
+
+        <!-- Aliases: treat requests for 'source' path as being for 'dest' path
+             May be made specific to a port or bound address using the "port"
+             and "bind-address" attributes.
+          -->
+        <!--
+        <alias source="/foo" dest="/bar"/>
+          -->
 	</paths>
 
 	<logging>

src/config.c

@@ -98,6 +98,7 @@ void config_clear(ice_config_t *c)
     ice_config_dir_t *dirnode, *nextdirnode;
     relay_server *relay, *nextrelay;
     mount_proxy *mount, *nextmount;
+    aliases *alias, *nextalias;
     int i;
 
     if (c->config_filename)
@@ -160,6 +161,16 @@ void config_clear(ice_config_t *c)
     }
     thread_mutex_unlock(&(_locks.mounts_lock));
 
+    alias = c->aliases;
+    while(alias) {
+        nextalias = alias->next;
+        xmlFree(alias->source);
+        xmlFree(alias->destination);
+        xmlFree(alias->bind_address);
+        free(alias);
+        alias = nextalias;
+    }
+
     dirnode = c->dir_list;
     while(dirnode) {
         nextdirnode = dirnode->next;
@@ -423,6 +434,7 @@ static void _parse_mount(xmlDocPtr doc, xmlNodePtr node,
         configuration->mounts = mount;
 
     mount->max_listeners = -1;
+    mount->next = NULL;
 
     do {
         if (node == NULL) break;
@@ -474,6 +486,8 @@ static void _parse_relay(xmlDocPtr doc, xmlNodePtr node,
     else
         configuration->relay = relay;
 
+    relay->next = NULL;
+
     do {
         if (node == NULL) break;
         if (xmlIsBlankNode(node)) continue;
@@ -606,6 +620,9 @@ static void _parse_directory(xmlDocPtr doc, xmlNodePtr node,
 static void _parse_paths(xmlDocPtr doc, xmlNodePtr node,
         ice_config_t *configuration)
 {
+    char *temp;
+    aliases *alias, *current, *last;
+
     do {
         if (node == NULL) break;
         if (xmlIsBlankNode(node)) continue;
@@ -621,7 +638,39 @@ static void _parse_paths(xmlDocPtr doc, xmlNodePtr node,
             configuration->webroot_dir = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
             if(configuration->webroot_dir[strlen(configuration->webroot_dir)-1] == '/')
                 configuration->webroot_dir[strlen(configuration->webroot_dir)-1] = 0;
-
+        } else if (strcmp(node->name, "alias") == 0) {
+            alias = malloc(sizeof(aliases));
+            alias->next = NULL;
+            alias->source = xmlGetProp(node, "source");
+            if(alias->source == NULL) {
+                free(alias);
+                continue;
+            }
+            alias->destination = xmlGetProp(node, "dest");
+            if(alias->destination == NULL) {
+                xmlFree(alias->source);
+                free(alias);
+                continue;
+            }
+            temp = NULL;
+            temp = xmlGetProp(node, "port");
+            if(temp != NULL) {
+                alias->port = atoi(temp);
+                xmlFree(temp);
+            }
+            else
+                alias->port = -1;
+            alias->bind_address = xmlGetProp(node, "bind-address");
+            current = configuration->aliases;
+            last = NULL;
+            while(current) {
+                last = current;
+                current = current->next;
+            }
+            if(last)
+                last->next = alias;
+            else
+                configuration->aliases = alias;
         }
     } while ((node = node->next));
 }

src/config.h

@@ -43,6 +43,14 @@ typedef struct _mount_proxy {
     struct _mount_proxy *next;
 } mount_proxy;
 
+typedef struct _aliases {
+    char *source;
+    char *destination;
+    int port;
+    char *bind_address;
+    struct _aliases *next;
+}aliases;
+
 typedef struct {
     int port;
     char *bind_address;
@@ -89,6 +97,7 @@ typedef struct ice_config_tag
     char *base_dir;
     char *log_dir;
     char *webroot_dir;
+    aliases *aliases;
 
     char *access_log;
     char *error_log;

src/connection.c

@@ -109,11 +109,12 @@ static unsigned long _next_connection_id(void)
     return id;
 }
 
-connection_t *create_connection(sock_t sock, char *ip) {
+connection_t *create_connection(sock_t sock, sock_t serversock, char *ip) {
     connection_t *con;
     con = (connection_t *)malloc(sizeof(connection_t));
     memset(con, 0, sizeof(connection_t));
     con->sock = sock;
+    con->serversock = serversock;
     con->con_time = time(NULL);
     con->id = _next_connection_id();
     con->ip = ip;
@@ -203,7 +204,7 @@ static connection_t *_accept_connection(void)
 
     sock = sock_accept(serversock, ip, MAX_ADDR_LEN);
     if (sock >= 0) {
-        con = create_connection(sock, ip);
+        con = create_connection(sock, serversock, ip);
 
         return con;
     }
@@ -648,6 +649,10 @@ static void _handle_get_request(connection_t *con,
     int fileserve;
     char *host;
     int port;
+    int i;
+    char *serverhost;
+    int serverport;
+    aliases *alias;
     ice_config_t *config;
     int client_limit;
 
@@ -655,6 +660,14 @@ static void _handle_get_request(connection_t *con,
     fileserve = config->fileserve;
     host = config->hostname;
     port = config->port;
+    for(i = 0; i < MAX_LISTEN_SOCKETS; i++) {
+        if(global.serversock[i] == con->serversock) {
+            serverhost = config->listeners[i].bind_address;
+            serverport = config->listeners[i].port;
+            break;
+        }
+    }
+    alias = config->aliases;
     client_limit = config->client_limit;
     config_release_config();
 
@@ -668,13 +681,22 @@ static void _handle_get_request(connection_t *con,
     /* there are several types of HTTP GET clients
     ** media clients, which are looking for a source (eg, URI = /stream.ogg)
     ** stats clients, which are looking for /admin/stats.xml
-    ** and director server authorizers, which are looking for /GUID-xxxxxxxx 
+    ** and directory server authorizers, which are looking for /GUID-xxxxxxxx 
     ** (where xxxxxx is the GUID in question) - this isn't implemented yet.
     ** we need to handle the latter two before the former, as the latter two
     ** aren't subject to the limits.
     */
     /* TODO: add GUID-xxxxxx */
 
+    /* Handle aliases */
+    while(alias) {
+        if(strcmp(uri, alias->source) == 0 && (alias->port == -1 || alias->port == serverport) && (alias->bind_address == NULL || (serverhost != NULL && strcmp(alias->bind_address, serverhost) == 0))) {
+            uri = alias->destination;
+            break;
+        }
+        alias = alias->next;
+    }
+
     /* Dispatch all admin requests */
     if (strncmp(uri, "/admin/", 7) == 0) {
         admin_handle_request(client, uri);

src/connection.h

@@ -17,6 +17,7 @@ typedef struct connection_tag
     uint64_t sent_bytes;
 
     int sock;
+    int serversock;
     int error;
 
     char *ip;
@@ -31,7 +32,7 @@ void connection_initialize(void);
 void connection_shutdown(void);
 void connection_accept_loop(void);
 void connection_close(connection_t *con);
-connection_t *create_connection(sock_t sock, char *ip);
+connection_t *create_connection(sock_t sock, sock_t serversock, char *ip);
 int connection_create_source(struct _client_tag *client, connection_t *con, 
         http_parser_t *parser, char *mount);
 

src/slave.c

@@ -91,7 +91,7 @@ static void create_relay_stream(char *server, int port,
         WARN2("Failed to relay stream from master server, couldn't connect to http://%s:%d", server, port);
         return;
     }
-    con = create_connection(streamsock, NULL);
+    con = create_connection(streamsock, -1, NULL);
     if(mp3) {
         /* Some mp3 servers are bitchy, send a user-agent string to make them
          * send the right response.