bgpd: fix memory leaks in show commands

sockunion_str2su allocates a struct sockunion that used to be leaked
in the show commands. Use str2sockunion and keep the information
on the stack instead.

Signed-off-by: Christian Franke <chris@opensourcerouting.org>
Signed-off-by: Christian Franke <chris@opensourcerouting.org>
Acked-by: Donald Sharp <sharpd@cumulusnetworks.com>
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>

bgpd/bgp_encap.c

@@ -649,24 +649,23 @@ DEFUN (show_bgp_ipv4_encap_neighbor_routes,
        "Neighbor to display information about\n"
        "Display routes learned from neighbor\n")
 {
-  union sockunion *su;
+  union sockunion su;
   struct peer *peer;
-  
-  su = sockunion_str2su (argv[0]);
-  if (su == NULL)
+
+  if (str2sockunion(argv[0], &su))
     {
       vty_out (vty, "Malformed address: %s%s", argv[0], VTY_NEWLINE);
                return CMD_WARNING;
     }
 
-  peer = peer_lookup (NULL, su);
+  peer = peer_lookup (NULL, &su);
   if (! peer || ! peer->afc[AFI_IP][SAFI_ENCAP])
     {
       vty_out (vty, "%% No such neighbor or address family%s", VTY_NEWLINE);
       return CMD_WARNING;
     }
 
-  return bgp_show_encap (vty, AFI_IP, NULL, bgp_show_type_neighbor, su, 0);
+  return bgp_show_encap (vty, AFI_IP, NULL, bgp_show_type_neighbor, &su, 0);
 }
 
 DEFUN (show_bgp_ipv6_encap_neighbor_routes,
@@ -680,24 +679,23 @@ DEFUN (show_bgp_ipv6_encap_neighbor_routes,
        "Neighbor to display information about\n"
        "Display routes learned from neighbor\n")
 {
-  union sockunion *su;
+  union sockunion su;
   struct peer *peer;
   
-  su = sockunion_str2su (argv[0]);
-  if (su == NULL)
+  if (str2sockunion(argv[0], &su))
     {
       vty_out (vty, "Malformed address: %s%s", argv[0], VTY_NEWLINE);
                return CMD_WARNING;
     }
 
-  peer = peer_lookup (NULL, su);
+  peer = peer_lookup (NULL, &su);
   if (! peer || ! peer->afc[AFI_IP6][SAFI_ENCAP])
     {
       vty_out (vty, "%% No such neighbor or address family%s", VTY_NEWLINE);
       return CMD_WARNING;
     }
 
-  return bgp_show_encap (vty, AFI_IP6, NULL, bgp_show_type_neighbor, su, 0);
+  return bgp_show_encap (vty, AFI_IP6, NULL, bgp_show_type_neighbor, &su, 0);
 }
 
 DEFUN (show_bgp_ipv4_encap_rd_neighbor_routes,
@@ -715,7 +713,7 @@ DEFUN (show_bgp_ipv4_encap_rd_neighbor_routes,
        "Display routes learned from neighbor\n")
 {
   int ret;
-  union sockunion *su;
+  union sockunion su;
   struct peer *peer;
   struct prefix_rd prd;
 
@@ -726,21 +724,20 @@ DEFUN (show_bgp_ipv4_encap_rd_neighbor_routes,
       return CMD_WARNING;
     }
 
-  su = sockunion_str2su (argv[1]);
-  if (su == NULL)
+  if (str2sockunion(argv[1], &su))
     {
       vty_out (vty, "Malformed address: %s%s", argv[1], VTY_NEWLINE);
                return CMD_WARNING;
     }
 
-  peer = peer_lookup (NULL, su);
+  peer = peer_lookup (NULL, &su);
   if (! peer || ! peer->afc[AFI_IP][SAFI_ENCAP])
     {
       vty_out (vty, "%% No such neighbor or address family%s", VTY_NEWLINE);
       return CMD_WARNING;
     }
 
-  return bgp_show_encap (vty, AFI_IP, &prd, bgp_show_type_neighbor, su, 0);
+  return bgp_show_encap (vty, AFI_IP, &prd, bgp_show_type_neighbor, &su, 0);
 }
 
 DEFUN (show_bgp_ipv6_encap_rd_neighbor_routes,
@@ -758,7 +755,7 @@ DEFUN (show_bgp_ipv6_encap_rd_neighbor_routes,
        "Display routes learned from neighbor\n")
 {
   int ret;
-  union sockunion *su;
+  union sockunion su;
   struct peer *peer;
   struct prefix_rd prd;
 
@@ -769,21 +766,20 @@ DEFUN (show_bgp_ipv6_encap_rd_neighbor_routes,
       return CMD_WARNING;
     }
 
-  su = sockunion_str2su (argv[1]);
-  if (su == NULL)
+  if (str2sockunion(argv[1], &su))
     {
       vty_out (vty, "Malformed address: %s%s", argv[1], VTY_NEWLINE);
                return CMD_WARNING;
     }
 
-  peer = peer_lookup (NULL, su);
+  peer = peer_lookup (NULL, &su);
   if (! peer || ! peer->afc[AFI_IP6][SAFI_ENCAP])
     {
       vty_out (vty, "%% No such neighbor or address family%s", VTY_NEWLINE);
       return CMD_WARNING;
     }
 
-  return bgp_show_encap (vty, AFI_IP6, &prd, bgp_show_type_neighbor, su, 0);
+  return bgp_show_encap (vty, AFI_IP6, &prd, bgp_show_type_neighbor, &su, 0);
 }
 
 DEFUN (show_bgp_ipv4_encap_neighbor_advertised_routes,

bgpd/bgp_mplsvpn.c

@@ -969,7 +969,7 @@ DEFUN (show_bgp_ipv4_vpn_rd_neighbor_routes,
        "Display routes learned from neighbor\n")
 {
   int ret;
-  union sockunion *su;
+  union sockunion su;
   struct peer *peer;
   struct prefix_rd prd;
 
@@ -980,21 +980,20 @@ DEFUN (show_bgp_ipv4_vpn_rd_neighbor_routes,
       return CMD_WARNING;
     }
 
-  su = sockunion_str2su (argv[1]);
-  if (su == NULL)
+  if (str2sockunion(argv[1], &su))
     {
       vty_out (vty, "Malformed address: %s%s", argv[1], VTY_NEWLINE);
                return CMD_WARNING;
     }
 
-  peer = peer_lookup (NULL, su);
+  peer = peer_lookup (NULL, &su);
   if (! peer || ! peer->afc[AFI_IP][SAFI_MPLS_VPN])
     {
       vty_out (vty, "%% No such neighbor or address family%s", VTY_NEWLINE);
       return CMD_WARNING;
     }
 
-  return bgp_show_mpls_vpn (vty, AFI_IP, &prd, bgp_show_type_neighbor, su, 0);
+  return bgp_show_mpls_vpn (vty, AFI_IP, &prd, bgp_show_type_neighbor, &su, 0);
 }
 DEFUN (show_bgp_ipv6_vpn_rd_neighbor_routes,
        show_bgp_ipv6_vpn_rd_neighbor_routes_cmd,
@@ -1010,7 +1009,7 @@ DEFUN (show_bgp_ipv6_vpn_rd_neighbor_routes,
        "Display routes learned from neighbor\n")
 {
   int ret;
-  union sockunion *su;
+  union sockunion su;
   struct peer *peer;
   struct prefix_rd prd;
 
@@ -1021,21 +1020,20 @@ DEFUN (show_bgp_ipv6_vpn_rd_neighbor_routes,
       return CMD_WARNING;
     }
 
-  su = sockunion_str2su (argv[1]);
-  if (su == NULL)
+  if (str2sockunion(argv[1], &su))
     {
       vty_out (vty, "Malformed address: %s%s", argv[1], VTY_NEWLINE);
                return CMD_WARNING;
     }
 
-  peer = peer_lookup (NULL, su);
+  peer = peer_lookup (NULL, &su);
   if (! peer || ! peer->afc[AFI_IP6][SAFI_MPLS_VPN])
     {
       vty_out (vty, "%% No such neighbor or address family%s", VTY_NEWLINE);
       return CMD_WARNING;
     }
 
-  return bgp_show_mpls_vpn (vty, AFI_IP6, &prd, bgp_show_type_neighbor, su, 0);
+  return bgp_show_mpls_vpn (vty, AFI_IP6, &prd, bgp_show_type_neighbor, &su, 0);
 }
 
 void

bgpd/bgp_route.c

@@ -9428,7 +9428,7 @@ bgp_show_community (struct vty *vty, const char *view_name, int argc,
   struct community *com;
   struct buffer *b;
   struct bgp *bgp;
-  int i;
+  int i, rv;
   char *str;
   int first = 0;
 
@@ -9479,9 +9479,11 @@ bgp_show_community (struct vty *vty, const char *view_name, int argc,
       return CMD_WARNING;
     }
 
-  return bgp_show (vty, bgp, afi, safi,
-                   (exact ? bgp_show_type_community_exact :
-		            bgp_show_type_community), com);
+  rv = bgp_show (vty, bgp, afi, safi,
+                 (exact ? bgp_show_type_community_exact :
+		          bgp_show_type_community), com);
+  community_free(com);
+  return rv;
 }
 
 DEFUN (show_ip_bgp_community,