Some changes/fixes for func_curl. curl_global_init is only supposed to be called once, and if it returns non-zero, we need to give up on further executions with that instance. Additionally, let's set absolute timeout values for the CURL connections to try and prevent possible Zap (and possibly other channel tech) channel lockouts.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@41900 65c4cc65-6c06-0410-ace0-fbb531ad65f3

funcs/func_curl.c

@@ -57,6 +57,7 @@ struct MemoryStruct {
 	size_t size;
 };
 
+
 static void *myrealloc(void *ptr, size_t size)
 {
 	/* There might be a realloc() out there that doesn't like reallocing
@@ -85,13 +86,16 @@ static int curl_internal(struct MemoryStruct *chunk, char *url, char *post)
 {
 	CURL *curl;
 
-	curl_global_init(CURL_GLOBAL_ALL);
 	curl = curl_easy_init();
 
 	if (!curl) {
 		return -1;
 	}
 
+	curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
+	curl_easy_setopt(curl, CURLOPT_TIMEOUT, 180);
+	curl_easy_setopt(curl, CURLOPT_FRESH_CONNECT, 1);
+	curl_easy_setopt(curl, CURLOPT_FORBID_REUSE, 1);
 	curl_easy_setopt(curl, CURLOPT_URL, url);
 	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
 	curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)chunk);
@@ -126,7 +130,7 @@ static int acf_curl_exec(struct ast_channel *chan, char *cmd, char *info, char *
 	u = ast_module_user_add(chan);
 
 	AST_STANDARD_APP_ARGS(args, info);	
-	
+
 	if (!curl_internal(&chunk, args.url, args.postdata)) {
 		if (chunk.memory) {
 			chunk.memory[chunk.size] = '\0';
@@ -162,6 +166,8 @@ static int unload_module(void)
 	res = ast_custom_function_unregister(&acf_curl);
 
 	ast_module_user_hangup_all();
+
+	curl_global_cleanup();
 	
 	return res;
 }
@@ -170,6 +176,11 @@ static int load_module(void)
 {
 	int res;
 
+	if (curl_global_init(CURL_GLOBAL_ALL)) {
+		ast_log(LOG_ERROR, "Unable to initialize the CURL library. Cannot load func_curl\n");
+		return AST_MODULE_LOAD_DECLINE;
+	}	
+
 	res = ast_custom_function_register(&acf_curl);
 
 	return res;