MINOR: listener: pass the chosen protocol to create_listeners()

The function will need to use more than just a family, let's pass it
the selected protocol. The caller will then be able to do all the fancy
stuff required to pick the best protocol.

include/haproxy/listener.h

@@ -85,13 +85,13 @@ void unbind_listener_no_close(struct listener *listener);
 
 /* creates one or multiple listeners for bind_conf <bc> on sockaddr <ss> on port
  * range <portl> to <porth>, and possibly attached to fd <fd> (or -1 for auto
- * allocation). The address family is taken from ss->ss_family. The number of
+ * allocation). The address family is taken from ss->ss_family, and the protocol
- * jobs and listeners is automatically increased by the number of listeners
+ * passed in <proto> must be usable on this family. The number of jobs and
- * created. It returns non-zero on success, zero on error with the error message
+ * listeners is automatically increased by the number of listeners created. It
- * set in <err>.
+ * returns non-zero on success, zero on error with the error message set in <err>.
  */
 int create_listeners(struct bind_conf *bc, const struct sockaddr_storage *ss,
-                     int portl, int porth, int fd, char **err);
+                     int portl, int porth, int fd, struct protocol *proto, char **err);
 
 /* Delete a listener from its protocol's list of listeners. The listener's
  * state is automatically updated from LI_ASSIGNED to LI_INIT. The protocol's

src/cfgparse.c

@@ -111,6 +111,7 @@ struct cfg_kw_list cfg_keywords = {
  */
 int str2listener(char *str, struct proxy *curproxy, struct bind_conf *bind_conf, const char *file, int line, char **err)
 {
+	struct protocol *proto;
 	char *next, *dupstr;
 	int port, end;
 
@@ -133,8 +134,14 @@ int str2listener(char *str, struct proxy *curproxy, struct bind_conf *bind_conf,
 		if (!ss2)
 			goto fail;
 
+		proto = protocol_by_family(ss2->ss_family);
+		if (!proto) {
+			memprintf(err, "unsupported protocol family %d fr address '%s'", ss2->ss_family, str);
+			goto fail;
+		}
+
 		/* OK the address looks correct */
-		if (!create_listeners(bind_conf, ss2, port, end, fd, err)) {
+		if (!create_listeners(bind_conf, ss2, port, end, fd, proto, err)) {
 			memprintf(err, "%s for address '%s'.\n", *err, str);
 			goto fail;
 		}
@@ -160,6 +167,7 @@ int str2listener(char *str, struct proxy *curproxy, struct bind_conf *bind_conf,
  */
 int str2receiver(char *str, struct proxy *curproxy, struct bind_conf *bind_conf, const char *file, int line, char **err)
 {
+	struct protocol *proto;
 	char *next, *dupstr;
 	int port, end;
 
@@ -182,8 +190,14 @@ int str2receiver(char *str, struct proxy *curproxy, struct bind_conf *bind_conf,
 		if (!ss2)
 			goto fail;
 
+		proto = protocol_by_family(ss2->ss_family);
+		if (!proto) {
+			memprintf(err, "unsupported protocol family %d fr address '%s'", ss2->ss_family, str);
+			goto fail;
+		}
+
 		/* OK the address looks correct */
-		if (!create_listeners(bind_conf, ss2, port, end, fd, err)) {
+		if (!create_listeners(bind_conf, ss2, port, end, fd, proto, err)) {
 			memprintf(err, "%s for address '%s'.\n", *err, str);
 			goto fail;
 		}

src/listener.c

@@ -535,23 +535,17 @@ void unbind_listener_no_close(struct listener *listener)
 
 /* creates one or multiple listeners for bind_conf <bc> on sockaddr <ss> on port
  * range <portl> to <porth>, and possibly attached to fd <fd> (or -1 for auto
- * allocation). The address family is taken from ss->ss_family. The number of
+ * allocation). The address family is taken from ss->ss_family, and the protocol
- * jobs and listeners is automatically increased by the number of listeners
+ * passed in <proto> must be usable on this family. The number of jobs and
- * created. It returns non-zero on success, zero on error with the error message
+ * listeners is automatically increased by the number of listeners created. It
- * set in <err>.
+ * returns non-zero on success, zero on error with the error message set in <err>.
  */
 int create_listeners(struct bind_conf *bc, const struct sockaddr_storage *ss,
-                     int portl, int porth, int fd, char **err)
+                     int portl, int porth, int fd, struct protocol *proto, char **err)
 {
-	struct protocol *proto = protocol_by_family(ss->ss_family);
 	struct listener *l;
 	int port;
 
-	if (!proto) {
-		memprintf(err, "unsupported protocol family %d", ss->ss_family);
-		return 0;
-	}
-
 	for (port = portl; port <= porth; port++) {
 		l = calloc(1, sizeof(*l));
 		if (!l) {