Cleaned up version of Ciaran Anscomb's relaying patch.

svn path=/trunk/httpp/; revision=3760

TODO

@@ -27,3 +27,7 @@ FEATURES
 - support W3C Extended Logging (http://www.w3.org/TR/WD-logfile.html)
 	toggle between this and Apache Combined Log Format in the config file.
 	default to apache style.
+
+- allow using get_predata() stuff to send an "intro" to any newly-connected
+  user?
+

conf/icecast.xml

@@ -3,12 +3,12 @@
 	<admin>jack@icecast.org</admin>
 
 	<limits>
-		<clients>100</clients>
+		<clients>2000</clients>
 		<sources>2</sources>
 		<threadpool>5</threadpool>
 		<client-timeout>30</client-timeout>
 		<header-timeout>15</header-timeout>
-		<source-timeout>10</source-timeout>
+		<source-timeout>100</source-timeout>
 	</limits>
 
 	<source-password>hackme</source-password>
@@ -25,8 +25,12 @@
 	<port>8000</port>
 	<!--<bind-address>127.0.0.1</bind-address>-->
 
+	<!--<master-server>127.0.0.1</master-server>-->
+	<!--<master-server-port>8001</master-server-port>-->
+    <!--<master-update-interval>120</master-update-interval>-->
+
         <paths>
-                <basedir>/usr/local/icecast</basedir>
+                <basedir>/home/msmith/icecast/icecast</basedir>
                 <logdir>/tmp</logdir>
         </paths>
 
@@ -37,9 +41,9 @@
 
     <security>
         <chroot>0</chroot>
-    <!--<changeowner>
-            <user>nobody</user>
+<!--        <changeowner>
+            <user>msmith</user>
             <group>nogroup</group>
-        </changeowner> -->
+        </changeowner>  -->
     </security>
 </icecast>

src/Makefile.am

@@ -7,10 +7,10 @@ SUBDIRS = avl thread httpp net log timing
 bin_PROGRAMS = icecast
 
 noinst_HEADERS = config.h os.h logging.h sighandler.h connection.h global.h\
-	 util.h source.h stats.h refbuf.h client.h format.h format_vorbis.h\
+	 util.h slave.h source.h stats.h refbuf.h client.h format.h format_vorbis.h\
 	 compat.h format_mp3.h
 icecast_SOURCES = config.c main.c logging.c sighandler.c connection.c global.c\
-	 util.c source.c stats.c refbuf.c client.c format.c format_vorbis.c\
+	 util.c slave.c source.c stats.c refbuf.c client.c format.c format_vorbis.c\
 	 format_mp3.c
     
 icecast_LDADD = net/libicenet.la thread/libicethread.la httpp/libicehttpp.la\

src/config.c

@@ -23,6 +23,7 @@
 #define CONFIG_DEFAULT_CHUID 0
 #define CONFIG_DEFAULT_USER NULL
 #define CONFIG_DEFAULT_GROUP NULL
+#define CONFIG_MASTER_UPDATE_INTERVAL 120
 
 #ifndef _WIN32
 #define CONFIG_DEFAULT_BASE_DIR "/usr/local/icecast"
@@ -141,6 +142,9 @@ static void _set_defaults(void)
 	_configuration.hostname = (char *)strdup(CONFIG_DEFAULT_HOSTNAME);
 	_configuration.port = CONFIG_DEFAULT_PORT;
 	_configuration.bind_address = NULL;
+	_configuration.master_server = NULL;
+	_configuration.master_server_port = CONFIG_DEFAULT_PORT;
+    _configuration.master_update_interval = CONFIG_MASTER_UPDATE_INTERVAL;
 	_configuration.base_dir = (char *)strdup(CONFIG_DEFAULT_BASE_DIR);
 	_configuration.log_dir = (char *)strdup(CONFIG_DEFAULT_LOG_DIR);
 	_configuration.access_log = (char *)strdup(CONFIG_DEFAULT_ACCESS_LOG);
@@ -166,8 +170,15 @@ static void _parse_root(xmlDocPtr doc, xmlNodePtr node)
 			if (_configuration.admin) free(_configuration.admin);
 			_configuration.admin = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
 		} else if (strcmp(node->name, "source-password") == 0) {
-			if (_configuration.source_password) free(_configuration.source_password);
-			_configuration.source_password = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
+            char *mount, *pass;
+            if ((mount = (char *)xmlGetProp(node, "mount")) != NULL) {
+                pass = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
+                /* FIXME: This is a placeholder for per-mount passwords */
+            }
+            else {
+			    if (_configuration.source_password) free(_configuration.source_password);
+			    _configuration.source_password = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
+            }
 		} else if (strcmp(node->name, "hostname") == 0) {
 			if (_configuration.hostname) free(_configuration.hostname);
 			_configuration.hostname = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
@@ -178,6 +189,15 @@ static void _parse_root(xmlDocPtr doc, xmlNodePtr node)
 		} else if (strcmp(node->name, "bind-address") == 0) {
 			if (_configuration.bind_address) free(_configuration.bind_address);
 			_configuration.bind_address = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
+		} else if (strcmp(node->name, "master-server") == 0) {
+			if (_configuration.master_server) free(_configuration.master_server);
+			_configuration.master_server = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
+		} else if (strcmp(node->name, "master-server-port") == 0) {
+			tmp = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
+			_configuration.master_server_port = atoi(tmp);
+        } else if (strcmp(node->name, "master-update-interval") == 0) {
+            tmp = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
+            _configuration.master_update_interval = atoi(tmp);
 		} else if (strcmp(node->name, "limits") == 0) {
 			_parse_limits(doc, node->xmlChildrenNode);
 		} else if (strcmp(node->name, "directory") == 0) {

src/config.h

@@ -33,6 +33,9 @@ typedef struct ice_config_tag
 	char *hostname;
 	int port;
 	char *bind_address;
+	char *master_server;
+	int master_server_port;
+    int master_update_interval;
 
 	char *base_dir;
 	char *log_dir;

src/connection.c

@@ -57,7 +57,7 @@ static mutex_t _queue_mutex;
 
 static thread_queue_t *_conhands = NULL;
 
-static rwlock_t _source_shutdown_rwlock;
+rwlock_t _source_shutdown_rwlock;
 
 static void *_handle_connection(void *arg);
 
@@ -69,6 +69,7 @@ void connection_initialize(void)
 	thread_mutex_create(&_queue_mutex);
 	thread_rwlock_create(&_source_shutdown_rwlock);
 	thread_cond_create(&_pool_cond);
+    thread_cond_create(&global.shutdown_cond);
 
 	_initialized = 1;
 }
@@ -77,6 +78,7 @@ void connection_shutdown(void)
 {
 	if (!_initialized) return;
 	
+    thread_cond_destroy(&global.shutdown_cond);
 	thread_cond_destroy(&_pool_cond);
 	thread_rwlock_destroy(&_source_shutdown_rwlock);
 	thread_mutex_destroy(&_queue_mutex);
@@ -85,16 +87,6 @@ void connection_shutdown(void)
 	_initialized = 0;
 }
 
-static connection_t *_create_connection(void)
-{
-	connection_t *con;
-
-	con = (connection_t *)malloc(sizeof(connection_t));
-	memset(con, 0, sizeof(connection_t));
-
-	return con;
-}
-
 static unsigned long _next_connection_id(void)
 {
 	unsigned long id;
@@ -106,6 +98,17 @@ static unsigned long _next_connection_id(void)
 	return id;
 }
 
+connection_t *create_connection(sock_t sock, char *ip) {
+	connection_t *con;
+	con = (connection_t *)malloc(sizeof(connection_t));
+	memset(con, 0, sizeof(connection_t));
+	con->sock = sock;
+	con->con_time = time(NULL);
+	con->id = _next_connection_id();
+	con->ip = ip;
+	return con;
+}
+
 static connection_t *_accept_connection(void)
 {
 	int sock;
@@ -121,12 +124,7 @@ static connection_t *_accept_connection(void)
 
 	sock = sock_accept(global.serversock, ip, 16);
 	if (sock >= 0) {
-		con = _create_connection();
-
-		con->sock = sock;
-		con->con_time = time(NULL);
-		con->id = _next_connection_id();
-		con->ip = ip;
+		con = create_connection(sock, ip);
 
 		return con;
 	}
@@ -246,6 +244,9 @@ void connection_accept_loop(void)
 		}
 	}
 
+    /* Give all the other threads notification to shut down */
+    thread_cond_broadcast(&global.shutdown_cond);
+
 	_destroy_pool();
 
 	/* wait for all the sources to shutdown */
@@ -283,6 +284,44 @@ static connection_t *_get_connection(void)
 	return con;
 }
 
+int connection_create_source(connection_t *con, http_parser_t *parser, char *mount) {
+	source_t *source;
+	char *contenttype;
+	/* check to make sure this source wouldn't
+	** be over the limit
+	*/
+	global_lock();
+	if (global.sources >= config_get_config()->source_limit) {
+		printf("TOO MANY SOURCE, KICKING THIS ONE\n");
+		INFO1("Source (%s) logged in, but there are too many sources", mount);
+		global_unlock();
+		return 0;
+	}
+	global.sources++;
+	global_unlock();
+	
+	stats_event_inc(NULL, "sources");
+
+	contenttype = httpp_getvar(parser, "content-type");
+
+	if (contenttype != NULL) {
+		format_type_t format = format_get_type(contenttype);
+		if (format < 0) {
+			WARN1("Content-type \"%s\" not supported, dropping source", contenttype);
+			return 0;
+		} else {
+			source = source_create(con, parser, mount, format);
+		}
+	} else {
+		WARN0("No content-type header, cannot handle source");
+		return 0;
+	}
+	source->shutdown_rwlock = &_source_shutdown_rwlock;
+	sock_set_blocking(con->sock, SOCK_NONBLOCK);
+	thread_create("Source Thread", source_main, (void *)source, THREAD_DETACHED);
+	return 1;
+}
+
 static void *_handle_connection(void *arg)
 {
 	char header[4096];
@@ -327,8 +366,6 @@ static void *_handle_connection(void *arg)
 				}
 
 				if (parser->req_type == httpp_req_source) {
-					char *contenttype;
-
 					printf("DEBUG: source logging in\n");
 					stats_event_inc(NULL, "source_connections");
 				
@@ -355,47 +392,11 @@ static void *_handle_connection(void *arg)
 					}
 					avl_tree_unlock(global.source_tree);
 
-					/* check to make sure this source wouldn't
-					** be over the limit
-					*/
-					global_lock();
-					if (global.sources >= config_get_config()->source_limit) {
-						printf("TOO MANY SOURCE, KICKING THIS ONE\n");
-						INFO1("Source (%s) logged in, but there are too many sources", httpp_getvar(parser, HTTPP_VAR_URI));
+					if (!connection_create_source(con, parser, httpp_getvar(parser, HTTPP_VAR_URI))) {
 						connection_close(con);
 						httpp_destroy(parser);
-						global_unlock();
-						continue;
-					}
-					global.sources++;
-					global_unlock();
-					
-					stats_event_inc(NULL, "sources");
-
-					contenttype = httpp_getvar(parser, "content-type");
-
-					if (contenttype != NULL) {
-						format_type_t format = format_get_type(contenttype);
-						if (format < 0) {
-							WARN1("Content-type \"%s\" not supported, dropping source", contenttype);
-						    connection_close(con);
-    						httpp_destroy(parser);
-							continue;
-						} else {
-							source = source_create(con, parser, httpp_getvar(parser, HTTPP_VAR_URI), format);
-						}
-					} else {
-						WARN0("No content-type header, cannot handle source");
-						connection_close(con);
-    					httpp_destroy(parser);
-						continue;
 					}
 
-					source->shutdown_rwlock = &_source_shutdown_rwlock;
-
-					sock_set_blocking(con->sock, SOCK_NONBLOCK);
-				
-					thread_create("Source Thread", source_main, (void *)source, THREAD_DETACHED);
 					continue;
 				} else if (parser->req_type == httpp_req_stats) {
 					printf("DEBUG: stats connection...\n");
@@ -438,6 +439,32 @@ static void *_handle_connection(void *arg)
 						stats_sendxml(client);
 						continue;
 					}
+
+					if (strcmp(httpp_getvar(parser, HTTPP_VAR_URI), "/allstreams.txt") == 0) {
+						if (strcmp((httpp_getvar(parser, "ice-password") != NULL) ? httpp_getvar(parser, "ice-password") : "", (config_get_config()->source_password != NULL) ? config_get_config()->source_password : "") != 0) {
+							printf("DEBUG: bad password for allstreams.txt\n");
+							INFO0("Client attempted to fetch allstreams.txt with bad password");
+							if (parser->req_type == httpp_req_get) {
+								client->respcode = 404;
+								bytes = sock_write(client->con->sock, "HTTP/1.0 404 Source Not Found\r\nContent-Type: text/html\r\n\r\n"\
+										   "<b>The source you requested could not be found.</b>\r\n");
+								if (bytes > 0) client->con->sent_bytes = bytes;
+							}
+						} else {
+							avl_node *node;
+							source_t *s;
+							avl_tree_rlock(global.source_tree);
+							node = avl_get_first(global.source_tree);
+							while (node) {
+								s = (source_t *)node->key;
+								sock_write(client->con->sock, "%s\r\n", s->mount);
+								node = avl_get_next(node);
+							}
+							avl_tree_unlock(global.source_tree);
+						}
+						client_destroy(client);
+						continue;
+					}
 					
 					global_lock();
 					if (global.clients >= config_get_config()->client_limit) {

src/connection.h

@@ -3,6 +3,9 @@
 
 #include <sys/types.h>
 #include "compat.h"
+#include "httpp.h"
+#include "thread.h"
+#include "sock.h"
 
 typedef struct connection_tag
 {
@@ -22,5 +25,10 @@ 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);
+int connection_create_source(connection_t *con, http_parser_t *parser,
+		char *mount);
+
+extern rwlock_t _source_shutdown_rwlock;
 
 #endif  /* __CONNECTION_H__ */

src/global.h

@@ -6,6 +6,8 @@
 #define ICE_RUNNING 1
 #define ICE_HALTING 2
 
+#include "thread/thread.h"
+
 typedef struct ice_global_tag
 {
 	int serversock;
@@ -16,6 +18,8 @@ typedef struct ice_global_tag
 	int clients;
 
 	avl_tree *source_tree;
+
+    cond_t shutdown_cond;
 } ice_global_t;
 
 extern ice_global_t global;

src/httpp/httpp.c

@@ -49,33 +49,12 @@ void httpp_initialize(http_parser_t *parser, http_varlist_t *defaults)
 	}
 }
 
-int httpp_parse(http_parser_t *parser, char *http_data, unsigned long len)
+static int split_headers(char *data, unsigned long len, char **line)
 {
-	char *data, *tmp;
-	char *line[MAX_HEADERS]; /* limited to 32 lines, should be more than enough */
-	int i, l, retlen;
-	int lines;
-	char *req_type = NULL;
-	char *uri = NULL;
-	char *version = NULL;
-	char *name = NULL;
-	char *value = NULL;
-	int whitespace, where;
-	int slen;
-
-	if (http_data == NULL)
-		return 0;
-
-	/* make a local copy of the data, including 0 terminator */
-	data = (char *)malloc(len+1);
-	if (data == NULL) return 0;
-	memcpy(data, http_data, len);
-    data[len] = 0;
-
 	/* first we count how many lines there are 
 	** and set up the line[] array	 
 	*/
-	lines = 0;
+	int i, lines = 0;
 	line[lines] = data;
 	for (i = 0; i < len && lines < MAX_HEADERS; i++) {
 		if (data[i] == '\r')
@@ -93,7 +72,134 @@ int httpp_parse(http_parser_t *parser, char *http_data, unsigned long len)
 
 	i++;
 	while (data[i] == '\n') i++;
-	retlen = i;
+
+    return lines;
+}
+
+static void parse_headers(http_parser_t *parser, char **line, int lines)
+{
+    int i,l;
+	int whitespace, where, slen;
+	char *name = NULL;
+	char *value = NULL;
+
+	/* parse the name: value lines. */
+	for (l = 1; l < lines; l++) {
+		where = 0;
+		whitespace = 0;
+		name = line[l];
+		value = NULL;
+		slen = strlen(line[l]);
+		for (i = 0; i < slen; i++) {
+			if (line[l][i] == ':') {
+				whitespace = 1;
+				line[l][i] = '\0';
+			} else {
+				if (whitespace) {
+					whitespace = 0;
+					while (i < slen && line[l][i] == ' ')
+						i++;
+
+					if (i < slen)
+						value = &line[l][i];
+					
+					break;
+				}
+			}
+		}
+		
+		if (name != NULL && value != NULL) {
+			httpp_setvar(parser, _lowercase(name), value);
+			name = NULL; 
+			value = NULL;
+		}
+	}
+}
+
+int httpp_parse_response(http_parser_t *parser, char *http_data, unsigned long len, char *uri)
+{
+    char *data;
+    char *line[MAX_HEADERS];
+    int lines, slen,i, whitespace=0, where=0,code;
+    char *version=NULL, *resp_code=NULL, *message=NULL;
+    
+    if(http_data == NULL)
+        return 0;
+
+	/* make a local copy of the data, including 0 terminator */
+	data = (char *)malloc(len+1);
+	if (data == NULL) return 0;
+	memcpy(data, http_data, len);
+    data[len] = 0;
+
+    lines = split_headers(data, len, line);
+
+    /* In this case, the first line contains:
+     * VERSION RESPONSE_CODE MESSAGE, such as
+     * HTTP/1.0 200 OK
+     */
+    slen = strlen(line[0]);
+    version = line[0];
+    for(i=0; i < slen; i++) {
+        if(line[0][i] == ' ') {
+            line[0][i] = 0;
+            whitespace = 1;
+        }
+        else if(whitespace) {
+            whitespace = 0;
+            where++;
+            if(where == 1)
+                resp_code = &line[0][i];
+            else {
+                message = &line[0][i];
+                break;
+            }
+        }
+    }
+
+    if(version == NULL || resp_code == NULL || message == NULL) {
+        free(data);
+        return 0;
+    }
+
+    code = atoi(resp_code);
+    if(code < 200 || code >= 300) {
+        httpp_setvar(parser, HTTPP_VAR_ERROR_MESSAGE, message);
+        free(data);
+        return 0;
+    }
+
+    httpp_setvar(parser, HTTPP_VAR_URI, uri);
+	httpp_setvar(parser, HTTPP_VAR_REQ_TYPE, "RELAY");
+
+    parse_headers(parser, line, lines);
+
+	free(data);
+
+	return 1;
+}
+
+int httpp_parse(http_parser_t *parser, char *http_data, unsigned long len)
+{
+	char *data, *tmp;
+	char *line[MAX_HEADERS]; /* limited to 32 lines, should be more than enough */
+	int i;
+	int lines;
+	char *req_type = NULL;
+	char *uri = NULL;
+	char *version = NULL;
+    int whitespace, where, slen;
+
+	if (http_data == NULL)
+		return 0;
+
+	/* make a local copy of the data, including 0 terminator */
+	data = (char *)malloc(len+1);
+	if (data == NULL) return 0;
+	memcpy(data, http_data, len);
+    data[len] = 0;
+
+    lines = split_headers(data, len, line);
 
 	/* parse the first line special
 	** the format is:
@@ -189,48 +295,18 @@ int httpp_parse(http_parser_t *parser, char *http_data, unsigned long len)
 		return 0;
 	}
 
-        if (parser->uri != NULL) {
+    if (parser->uri != NULL) {
 		httpp_setvar(parser, HTTPP_VAR_URI, parser->uri);
 	} else {
 		free(data);
 		return 0;
 	}
 
-	/* parse the name: value lines. */
-	for (l = 1; l < lines; l++) {
-		where = 0;
-		whitespace = 0;
-		name = line[l];
-		value = NULL;
-		slen = strlen(line[l]);
-		for (i = 0; i < slen; i++) {
-			if (line[l][i] == ':') {
-				whitespace = 1;
-				line[l][i] = '\0';
-			} else {
-				if (whitespace) {
-					whitespace = 0;
-					while (i < slen && line[l][i] == ' ')
-						i++;
-
-					if (i < slen)
-						value = &line[l][i];
-					
-					break;
-				}
-			}
-		}
-		
-		if (name != NULL && value != NULL) {
-			httpp_setvar(parser, _lowercase(name), value);
-			name = NULL; 
-			value = NULL;
-		}
-	}
+    parse_headers(parser, line, lines);
 
 	free(data);
 
-	return retlen;
+	return 1;
 }
 
 void httpp_setvar(http_parser_t *parser, char *name, char *value)

src/httpp/httpp.h

@@ -12,6 +12,7 @@
 #define HTTPP_VAR_VERSION "__version"
 #define HTTPP_VAR_URI "__uri"
 #define HTTPP_VAR_REQ_TYPE "__req_type"
+#define HTTPP_VAR_ERROR_MESSAGE "__errormessage"
 
 typedef enum httpp_request_type_tag {
 	httpp_req_none, httpp_req_get, httpp_req_post, httpp_req_head, httpp_req_source, httpp_req_play, httpp_req_stats, httpp_req_unknown
@@ -30,13 +31,13 @@ typedef struct http_varlist_tag {
 typedef struct http_parser_tag {
 	httpp_request_type_e req_type;
 	char *uri;
-
 	avl_tree *vars;
 } http_parser_t;
 
 http_parser_t *httpp_create_parser(void);
 void httpp_initialize(http_parser_t *parser, http_varlist_t *defaults);
 int httpp_parse(http_parser_t *parser, char *http_data, unsigned long len);
+int httpp_parse_response(http_parser_t *parser, char *http_data, unsigned long len, char *uri);
 void httpp_setvar(http_parser_t *parser, char *name, char *value);
 char *httpp_getvar(http_parser_t *parser, char *name);
 void httpp_destroy(http_parser_t *parser);

src/main.c

@@ -23,6 +23,7 @@
 #include "connection.h"
 #include "refbuf.h"
 #include "client.h"
+#include "slave.h"
 #include "stats.h"
 #include "logging.h"
 
@@ -56,6 +57,7 @@ static void _shutdown_subsystems(void)
 {
 	refbuf_shutdown();
 	stats_shutdown();
+	slave_shutdown();
 	global_shutdown();
 	connection_shutdown();
 	config_shutdown();
@@ -316,6 +318,9 @@ int main(int argc, char **argv)
 		return 1;
 	}
 
+    /* Do this after logging init */
+    slave_initialize();
+
 	INFO0("icecast server started");
 
 	/* REM 3D Graphics */

src/net/resolver.c

@@ -127,6 +127,7 @@ static char *_lookup(const char *what, char *buff, int len)
 		if (host == NULL) {
 			buff = NULL;
 		} else {
+            // still need to be locked here? 
 			temp = inet_ntoa(*(struct in_addr *)host->h_addr);
 			strncpy(buff, temp, len);
 		}

src/slave.c

+/* slave.c
+ * by Ciaran Anscomb <ciaran.anscomb@6809.org.uk>
+ *
+ * Periodically requests a list of streams from a master server
+ * and creates source threads for any it doesn't already have.
+ * */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <sys/types.h>
+
+#ifndef _WIN32
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#else
+#include <winsock2.h>
+#define snprintf _snprintf
+#define strcasecmp stricmp
+#define strncasecmp strnicmp
+#endif
+
+#include "os.h"
+
+#include "thread.h"
+#include "avl.h"
+#include "sock.h"
+#include "log.h"
+#include "httpp.h"
+
+#include "config.h"
+#include "global.h"
+#include "util.h"
+#include "connection.h"
+#include "refbuf.h"
+#include "client.h"
+#include "stats.h"
+#include "format.h"
+#include "logging.h"
+
+#include "source.h"
+
+#define CATMODULE "slave"
+
+static void *_slave_thread(void *arg);
+long _slave_thread_id;
+static int _initialized = 0;
+
+void slave_initialize(void) {
+	if (_initialized) return;
+    /* Don't create a slave thread if it isn't configured */
+    if (config_get_config()->master_server == NULL)
+        return;
+
+	_initialized = 1;
+	_slave_thread_id = thread_create("Slave Thread", _slave_thread, NULL, THREAD_ATTACHED);
+}
+
+void slave_shutdown(void) {
+	if (!_initialized) return;
+	_initialized = 0;
+	thread_join(_slave_thread_id);
+}
+
+static void *_slave_thread(void *arg) {
+	sock_t mastersock, streamsock;
+	char buf[256];
+	char header[4096];
+	connection_t *con;
+	http_parser_t *parser;
+    int interval = config_get_config()->master_update_interval;
+
+	while (_initialized) {
+        if (config_get_config()->master_update_interval > ++interval) {
+		    thread_sleep(1000000);
+            continue;
+        }
+        else
+            interval = 0;
+
+		mastersock = sock_connect_wto(config_get_config()->master_server, config_get_config()->master_server_port, 0);
+		if (mastersock == SOCK_ERROR) {
+			printf("DEBUG: failed to contact master server