MINOR: stream_interface: add a pointer to the listener for TARG_TYPE_CLIENT

When the target is a client, it will be convenient to have a pointer to the
original listener so that we can retrieve some configuration information at
the stream interface level.

include/proto/stream_interface.h

@@ -63,10 +63,10 @@ static inline void clear_target(struct target *dest)
 	dest->ptr.v = NULL;
 }
 
-static inline void set_target_client(struct target *dest)
+static inline void set_target_client(struct target *dest, struct listener *l)
 {
 	dest->type = TARG_TYPE_CLIENT;
-	dest->ptr.v = NULL;
+	dest->ptr.l = l;
 }
 
 static inline void set_target_server(struct target *dest, struct server *s)
@@ -111,6 +111,13 @@ static inline struct server *target_srv(struct target *t)
 	return t->ptr.s;
 }
 
+static inline struct listener *target_client(struct target *t)
+{
+	if (!t || t->type != TARG_TYPE_CLIENT)
+		return NULL;
+	return t->ptr.l;
+}
+
 static inline void stream_interface_prepare(struct stream_interface *si, const struct sock_ops *ops)
 {
 	si->conn.data = ops;

include/types/stream_interface.h

@@ -122,6 +122,7 @@ struct target {
 		struct server *s;     /* when type is TARG_TYPE_SERVER */
 		struct si_applet *a;  /* when type is TARG_TYPE_APPLET */
 		struct task *t;       /* when type is TARG_TYPE_TASK */
+		struct listener *l;   /* when type is TARG_TYPE_CLIENT */
 	} ptr;
 };
 

src/peers.c

@@ -1157,7 +1157,7 @@ static struct session *peer_session_create(struct peer *peer, struct peer_sessio
 	s->si[0].conn.ctrl = NULL;
 	s->si[0].release = NULL;
 	s->si[0].send_proxy_ofs = 0;
-	set_target_client(&s->si[0].target);
+	set_target_client(&s->si[0].target, l);
 	s->si[0].exp = TICK_ETERNITY;
 	s->si[0].flags = SI_FL_NONE;
 	if (s->fe->options2 & PR_O2_INDEPSTR)

src/session.c

@@ -169,7 +169,7 @@ int session_accept(struct listener *l, int cfd, struct sockaddr_storage *addr)
 	s->si[0].conn.ctrl = l->proto;
 	s->si[0].release   = NULL;
 	s->si[0].send_proxy_ofs = 0;
-	set_target_client(&s->si[0].target);
+	set_target_client(&s->si[0].target, l);
 	s->si[0].exp       = TICK_ETERNITY;
 	s->si[0].flags     = SI_FL_NONE;