pimd: remove temporary variables from MSDP peer

Remove from MSDP peer data structure two temporary variables
that should only be used when calling library functions.

Signed-off-by: Rafael Zalamena <rzalamena@opensourcerouting.org>

pimd/pim_msdp.c

@@ -1012,16 +1012,6 @@ void pim_msdp_peer_pkt_txed(struct pim_msdp_peer *mp)
 	}
 }
 
-static void pim_msdp_addr2su(union sockunion *su, struct in_addr addr)
-{
-	sockunion_init(su);
-	su->sin.sin_addr = addr;
-	su->sin.sin_family = AF_INET;
-#ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
-	su->sin.sin_len = sizeof(struct sockaddr_in);
-#endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
-}
-
 /* 11.2.A1: create a new peer and transition state to listen or connecting */
 struct pim_msdp_peer *pim_msdp_peer_add(struct pim_instance *pim,
 					const struct in_addr *peer,
@@ -1037,11 +1027,9 @@ struct pim_msdp_peer *pim_msdp_peer_add(struct pim_instance *pim,
 	mp->pim = pim;
 	mp->peer = *peer;
 	pim_inet4_dump("<peer?>", mp->peer, mp->key_str, sizeof(mp->key_str));
-	pim_msdp_addr2su(&mp->su_peer, mp->peer);
 	mp->local = *local;
 	/* XXX: originator_id setting needs to move to the mesh group */
 	pim->msdp.originator_id = *local;
-	pim_msdp_addr2su(&mp->su_local, mp->local);
 	if (mesh_group_name)
 		mp->mesh_group_name =
 			XSTRDUP(MTYPE_PIM_MSDP_MG_NAME, mesh_group_name);

pimd/pim_msdp.h

@@ -114,9 +114,6 @@ struct pim_msdp_peer {
 	enum pim_msdp_peer_state state;
 	enum pim_msdp_peer_flags flags;
 
-	/* TCP socket info */
-	union sockunion su_local;
-	union sockunion su_peer;
 	int fd;
 
 /* protocol timers */

pimd/pim_msdp_socket.c

@@ -49,6 +49,16 @@ static void pim_msdp_update_sock_send_buffer_size(int fd)
 	}
 }
 
+static void pim_msdp_addr2su(union sockunion *su, struct in_addr addr)
+{
+	sockunion_init(su);
+	su->sin.sin_addr = addr;
+	su->sin.sin_family = AF_INET;
+#ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
+	su->sin.sin_len = sizeof(struct sockaddr_in);
+#endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
+}
+
 /**
  * Helper function to reduce code duplication.
  *
@@ -64,7 +74,6 @@ static int _pim_msdp_sock_listen(const struct vrf *vrf,
 	int rv;
 	socklen_t socklen;
 	struct sockaddr_in sin = {};
-	union sockunion su_peer = {};
 
 	sock = socket(AF_INET, SOCK_STREAM, 0);
 	if (sock == -1) {
@@ -117,7 +126,9 @@ static int _pim_msdp_sock_listen(const struct vrf *vrf,
 
 	/* Set MD5 authentication. */
 	if (mp && mp->auth_key) {
-		su_peer = mp->su_peer;
+		union sockunion su_peer = {};
+
+		pim_msdp_addr2su(&su_peer, mp->peer);
 		frr_with_privs (&pimd_privs) {
 			sockopt_tcp_signature(sock, &su_peer, mp->auth_key);
 		}
@@ -349,6 +360,7 @@ int pim_msdp_sock_listen(struct pim_instance *pim)
 int pim_msdp_sock_connect(struct pim_msdp_peer *mp)
 {
 	int rc;
+	union sockunion su_peer = {}, su_local = {};
 
 	if (PIM_DEBUG_MSDP_INTERNAL) {
 		zlog_debug("MSDP peer %s attempt connect%s", mp->key_str,
@@ -366,8 +378,11 @@ int pim_msdp_sock_connect(struct pim_msdp_peer *mp)
 		pim_msdp_peer_stop_tcp_conn(mp, false /* chg_state */);
 	}
 
+	pim_msdp_addr2su(&su_peer, mp->peer);
+	pim_msdp_addr2su(&su_local, mp->local);
+
 	/* Make socket for the peer. */
-	mp->fd = sockunion_socket(&mp->su_peer);
+	mp->fd = sockunion_socket(&su_peer);
 	if (mp->fd < 0) {
 		flog_err_sys(EC_LIB_SOCKET,
 			     "pim_msdp_socket socket failure: %s",
@@ -402,7 +417,7 @@ int pim_msdp_sock_connect(struct pim_msdp_peer *mp)
 	sockopt_reuseport(mp->fd);
 
 	/* source bind */
-	rc = sockunion_bind(mp->fd, &mp->su_local, 0, &mp->su_local);
+	rc = sockunion_bind(mp->fd, &su_local, 0, &su_local);
 	if (rc < 0) {
 		flog_err_sys(EC_LIB_SOCKET,
 			     "pim_msdp_socket connect bind failure: %s",
@@ -421,12 +436,10 @@ int pim_msdp_sock_connect(struct pim_msdp_peer *mp)
 	/* Set authentication (if configured). */
 	if (mp->auth_key) {
 		frr_with_privs (&pimd_privs) {
-			sockopt_tcp_signature(mp->fd, &mp->su_peer,
+			sockopt_tcp_signature(mp->fd, &su_peer, mp->auth_key);
-					      mp->auth_key);
 		}
 	}
 
 	/* Connect to the remote mp. */
-	return (sockunion_connect(mp->fd, &mp->su_peer,
+	return (sockunion_connect(mp->fd, &su_peer, htons(PIM_MSDP_TCP_PORT), 0));
-				  htons(PIM_MSDP_TCP_PORT), 0));
 }