SCTP: coverity scan warnings

This patch addresses 182346, 182347, 182353.

Change-Id: I59c3d74bd3a2122b836c93e22ddb632fa032f7fe
Signed-off-by: Marco Varlese <marco.varlese@suse.com>
(cherry picked from commit 216c35b2c6e5b4a728675f5141241420841cda34)

3 files changed, 39 insertions, 30 deletions

diff --git a/src/vnet/sctp/sctp.h b/src/vnet/sctp/sctp.h
index d9b2f569e4a..ffe3e1b195f 100644
--- a/src/vnet/sctp/sctp.h
+++ b/src/vnet/sctp/sctp.h
@@ -312,19 +312,18 @@ void sctp_init_mss (sctp_connection_t * sctp_conn);
 
 void sctp_prepare_initack_chunk (sctp_connection_t * sctp_conn, u8 idx,
 				 vlib_buffer_t * b, ip4_address_t * ip4_addr,
-				 ip6_address_t * ip6_addr);
-void
-sctp_prepare_initack_chunk_for_collision (sctp_connection_t * sctp_conn,
-					  u8 idx, vlib_buffer_t * b,
-					  ip4_address_t * ip4_addr,
-					  ip6_address_t * ip6_addr);
+				 u8 add_ip4, ip6_address_t * ip6_addr,
+				 u8 add_ip6);
+void sctp_prepare_initack_chunk_for_collision (sctp_connection_t * sctp_conn,
+					       u8 idx, vlib_buffer_t * b,
+					       ip4_address_t * ip4_addr,
+					       ip6_address_t * ip6_addr);
 void sctp_prepare_abort_for_collision (sctp_connection_t * sctp_conn, u8 idx,
 				       vlib_buffer_t * b,
 				       ip4_address_t * ip4_addr,
 				       ip6_address_t * ip6_addr);
-void
-sctp_prepare_operation_error (sctp_connection_t * sctp_conn, u8 idx,
-			      vlib_buffer_t * b, u8 err_cause);
+void sctp_prepare_operation_error (sctp_connection_t * sctp_conn, u8 idx,
+				   vlib_buffer_t * b, u8 err_cause);
 void sctp_prepare_cookie_echo_chunk (sctp_connection_t * sctp_conn, u8 idx,
 				     vlib_buffer_t * b, u8 reuse_buffer);
 void sctp_prepare_cookie_ack_chunk (sctp_connection_t * sctp_conn, u8 idx,
diff --git a/src/vnet/sctp/sctp_input.c b/src/vnet/sctp/sctp_input.c
index 775d14ae21a..ff79840f9fb 100644
--- a/src/vnet/sctp/sctp_input.c
+++ b/src/vnet/sctp/sctp_input.c
@@ -319,8 +319,10 @@ sctp_handle_init (sctp_header_t * sctp_hdr,
 		  u16 sctp_implied_length)
 {
   sctp_init_chunk_t *init_chunk = (sctp_init_chunk_t *) (sctp_hdr);
-  ip4_address_t *ip4_addr = 0;
-  ip6_address_t *ip6_addr = 0;
+  ip4_address_t ip4_addr;
+  ip6_address_t ip6_addr;
+  u8 add_ip4 = 0;
+  u8 add_ip6 = 0;
   char hostname[FQDN_MAX_LENGTH];
 
   /* Check the current state of the connection
@@ -338,7 +340,7 @@ sctp_handle_init (sctp_header_t * sctp_hdr,
 	  SCTP_ADV_DBG ("Received INIT chunk while in COOKIE_WAIT state");
 	  sctp_prepare_initack_chunk_for_collision (sctp_conn,
 						    SCTP_PRIMARY_PATH_IDX,
-						    b0, ip4_addr, ip6_addr);
+						    b0, &ip4_addr, &ip6_addr);
 	  return SCTP_ERROR_NONE;
 	case SCTP_STATE_COOKIE_ECHOED:
 	case SCTP_STATE_SHUTDOWN_ACK_SENT:
@@ -346,11 +348,12 @@ sctp_handle_init (sctp_header_t * sctp_hdr,
 	  if (sctp_conn->forming_association_changed == 0)
 	    sctp_prepare_initack_chunk_for_collision (sctp_conn,
 						      SCTP_PRIMARY_PATH_IDX,
-						      b0, ip4_addr, ip6_addr);
+						      b0, &ip4_addr,
+						      &ip6_addr);
 	  else
 	    sctp_prepare_abort_for_collision (sctp_conn,
 					      SCTP_PRIMARY_PATH_IDX, b0,
-					      ip4_addr, ip6_addr);
+					      &ip4_addr, &ip6_addr);
 	  return SCTP_ERROR_NONE;
 	}
     }
@@ -395,13 +398,16 @@ sctp_handle_init (sctp_header_t * sctp_hdr,
 	      {
 		sctp_ipv4_addr_param_t *ipv4 =
 		  (sctp_ipv4_addr_param_t *) opt_params_hdr;
-		clib_memcpy (ip4_addr, &ipv4->address,
+		clib_memcpy (&ip4_addr, &ipv4->address,
 			     sizeof (ip4_address_t));
 
-		sctp_sub_connection_add_ip4 (vlib_get_main (),
-					     &sctp_conn->sub_conn
-					     [SCTP_PRIMARY_PATH_IDX].connection.
-					     lcl_ip.ip4, &ipv4->address);
+		if (sctp_sub_connection_add_ip4 (vlib_get_main (),
+						 &sctp_conn->sub_conn
+						 [SCTP_PRIMARY_PATH_IDX].connection.
+						 lcl_ip.ip4,
+						 &ipv4->address) ==
+		    SCTP_ERROR_NONE)
+		  add_ip4 = 1;
 
 		break;
 	      }
@@ -409,13 +415,16 @@ sctp_handle_init (sctp_header_t * sctp_hdr,
 	      {
 		sctp_ipv6_addr_param_t *ipv6 =
 		  (sctp_ipv6_addr_param_t *) opt_params_hdr;
-		clib_memcpy (ip6_addr, &ipv6->address,
+		clib_memcpy (&ip6_addr, &ipv6->address,
 			     sizeof (ip6_address_t));
 
-		sctp_sub_connection_add_ip6 (vlib_get_main (),
-					     &sctp_conn->sub_conn
-					     [SCTP_PRIMARY_PATH_IDX].connection.
-					     lcl_ip.ip6, &ipv6->address);
+		if (sctp_sub_connection_add_ip6 (vlib_get_main (),
+						 &sctp_conn->sub_conn
+						 [SCTP_PRIMARY_PATH_IDX].connection.
+						 lcl_ip.ip6,
+						 &ipv6->address) ==
+		    SCTP_ERROR_NONE)
+		  add_ip6 = 1;
 
 		break;
 	      }
@@ -446,8 +455,8 @@ sctp_handle_init (sctp_header_t * sctp_hdr,
     }
 
   /* Reuse buffer to make init-ack and send */
-  sctp_prepare_initack_chunk (sctp_conn, SCTP_PRIMARY_PATH_IDX, b0, ip4_addr,
-			      ip6_addr);
+  sctp_prepare_initack_chunk (sctp_conn, SCTP_PRIMARY_PATH_IDX, b0, &ip4_addr,
+			      add_ip4, &ip6_addr, add_ip6);
   return SCTP_ERROR_NONE;
 }
 
@@ -1692,7 +1701,8 @@ sctp46_listen_process_inline (vlib_main_t * vm,
 	  sctp_chunks_common_hdr_t *sctp_chunk_hdr = &full_hdr->common_hdr;
 
 	  u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
-	  if (chunk_type != INIT)
+	  if (chunk_type != INIT && chunk_type != DATA
+	      && chunk_type != OPERATION_ERROR)
 	    {
 	      SCTP_DBG
 		("conn_index = %u: chunk_type != INIT... chunk_type=%s",
diff --git a/src/vnet/sctp/sctp_output.c b/src/vnet/sctp/sctp_output.c
index 8ce94c6f3a2..e2738e90c09 100644
--- a/src/vnet/sctp/sctp_output.c
+++ b/src/vnet/sctp/sctp_output.c
@@ -868,7 +868,7 @@ sctp_prepare_initack_chunk_for_collision (sctp_connection_t * sctp_conn,
 void
 sctp_prepare_initack_chunk (sctp_connection_t * sctp_conn, u8 idx,
 			    vlib_buffer_t * b, ip4_address_t * ip4_addr,
-			    ip6_address_t * ip6_addr)
+			    u8 add_ip4, ip6_address_t * ip6_addr, u8 add_ip6)
 {
   vlib_main_t *vm = vlib_get_main ();
   sctp_ipv4_addr_param_t *ip4_param = 0;
@@ -881,12 +881,12 @@ sctp_prepare_initack_chunk (sctp_connection_t * sctp_conn, u8 idx,
   u16 alloc_bytes =
     sizeof (sctp_init_ack_chunk_t) + sizeof (sctp_state_cookie_param_t);
 
-  if (PREDICT_TRUE (ip4_addr != NULL))
+  if (PREDICT_FALSE (add_ip4 == 1))
     {
       /* Create room for variable-length fields in the INIT_ACK chunk */
       alloc_bytes += SCTP_IPV4_ADDRESS_TYPE_LENGTH;
     }
-  if (PREDICT_TRUE (ip6_addr != NULL))
+  if (PREDICT_FALSE (add_ip6 == 1))
     {
       /* Create room for variable-length fields in the INIT_ACK chunk */
       alloc_bytes += SCTP_IPV6_ADDRESS_TYPE_LENGTH;