http_client: proper free for curl params in case of failover connection

(cherry picked from commit 9ce3820)

src/modules/http_client/functions.c

@@ -464,12 +464,15 @@ int curl_get_redirect(struct sip_msg* _m, const str *connection, str* result)
 
 
 /*! Run a query based on a connection definition */
-int curl_con_query_url_f(struct sip_msg* _m, const str *connection, const str* url, str* result, const char *contenttype, const str* post, int failover)
+int curl_con_query_url_f(struct sip_msg* _m, const str *connection,
+			const str* url, str* result, const char *contenttype,
+			const str* post, int failover)
 {
 	curl_con_t *conn = NULL;
 	curl_con_pkg_t *pconn = NULL;
 	char *urlbuf = NULL;
 	char *postdata = NULL;
+	char *failovercon = NULL;
 	curl_query_t query_params;
 
 	unsigned int maxdatasize = default_maxdatasize;
@@ -495,7 +498,6 @@ int curl_con_query_url_f(struct sip_msg* _m, const str *connection, const str* u
 	LM_DBG("******** CURL Connection found %.*s\n", connection->len, connection->s);
 	maxdatasize = conn->maxdatasize;
 
-
 	if (url && (url->len > 0) && (url->s != NULL)) {
 		int url_len = conn->schema.len + 3 + conn->url.len + 1 + url->len + 1;
 		urlbuf = pkg_malloc(url_len);
@@ -552,7 +554,10 @@ int curl_con_query_url_f(struct sip_msg* _m, const str *connection, const str* u
 	query_params.oneline = 0;
 	query_params.maxdatasize = maxdatasize;
 	query_params.http_proxy_port = conn->http_proxy_port;
-	query_params.failovercon = conn->failover.s ? as_asciiz(&conn->failover) : NULL;
+	if(conn->failover.s) {
+		failovercon = as_asciiz(&conn->failover);
+	}
+	query_params.failovercon = failovercon;
 	query_params.pconn = pconn;
 	if (conn->http_proxy) {
 		query_params.http_proxy = conn->http_proxy;
@@ -567,14 +572,19 @@ int curl_con_query_url_f(struct sip_msg* _m, const str *connection, const str* u
 		int counter = failover + 1;
 		if (counter >= 2) {
 			LM_DBG("**** No more failovers - returning failure\n");
-			return (res - 1000);
+			res = (res - 1000);
+			goto error;
 		}
 		/* Time for failover */
-		return curl_con_query_url_f(_m, &conn->failover, url, result, contenttype, post, counter);
+		res = curl_con_query_url_f(_m, &conn->failover, url, result,
+				contenttype, post, counter);
 	}
 
-	LM_DBG("***** #### ***** CURL DONE : %s \n", urlbuf);
+	LM_DBG("***** #### ***** CURL DONE: %s (%d)\n", urlbuf, res);
 error:
+	if (failovercon != NULL) {
+		pkg_free(failovercon);
+	}
 	if (urlbuf != NULL) {
 		pkg_free(urlbuf);
 	}