bfd: refactor code to fix misc warnings

This change fixes multiple unused parameter warnings, narrowing
conversion warnings and identical switch statement warnings.

Type: refactor
Signed-off-by: Klement Sekera <klement.sekera@gmail.com>
Change-Id: I4140e939c409ce06cc5aaaf5e1b042681f7ca448

3 files changed, 110 insertions, 131 deletions

diff --git a/src/vnet/bfd/bfd_main.c b/src/vnet/bfd/bfd_main.c
index 530b2978068..23e3f0f02e9 100644
--- a/src/vnet/bfd/bfd_main.c
+++ b/src/vnet/bfd/bfd_main.c
@@ -172,7 +172,7 @@ bfd_set_poll_state (bfd_session_t * bs, bfd_poll_state_e state)
 }
 
 static void
-bfd_recalc_tx_interval (bfd_main_t * bm, bfd_session_t * bs)
+bfd_recalc_tx_interval (bfd_session_t *bs)
 {
   bs->transmit_interval_nsec =
     clib_max (bs->effective_desired_min_tx_nsec, bs->remote_min_rx_nsec);
@@ -181,7 +181,7 @@ bfd_recalc_tx_interval (bfd_main_t * bm, bfd_session_t * bs)
 }
 
 static void
-bfd_recalc_echo_tx_interval (bfd_main_t * bm, bfd_session_t * bs)
+bfd_recalc_echo_tx_interval (bfd_session_t *bs)
 {
   bs->echo_transmit_interval_nsec =
     clib_max (bs->effective_desired_min_tx_nsec, bs->remote_min_echo_rx_nsec);
@@ -240,7 +240,7 @@ bfd_calc_next_tx (bfd_main_t * bm, bfd_session_t * bs, u64 now)
 }
 
 static void
-bfd_calc_next_echo_tx (bfd_main_t * bm, bfd_session_t * bs, u64 now)
+bfd_calc_next_echo_tx (bfd_session_t *bs, u64 now)
 {
   bs->echo_tx_timeout_nsec =
     bs->echo_last_tx_nsec + bs->echo_transmit_interval_nsec;
@@ -261,7 +261,7 @@ bfd_calc_next_echo_tx (bfd_main_t * bm, bfd_session_t * bs, u64 now)
 }
 
 static void
-bfd_recalc_detection_time (bfd_main_t * bm, bfd_session_t * bs)
+bfd_recalc_detection_time (bfd_session_t *bs)
 {
   if (bs->local_state == BFD_STATE_init || bs->local_state == BFD_STATE_up)
     {
@@ -385,26 +385,24 @@ bfd_set_effective_desired_min_tx (bfd_main_t * bm,
   bs->effective_desired_min_tx_nsec = desired_min_tx_nsec;
   BFD_DBG ("Set effective desired min tx to " BFD_CLK_FMT,
 	   BFD_CLK_PRN (bs->effective_desired_min_tx_nsec));
-  bfd_recalc_detection_time (bm, bs);
-  bfd_recalc_tx_interval (bm, bs);
-  bfd_recalc_echo_tx_interval (bm, bs);
+  bfd_recalc_detection_time (bs);
+  bfd_recalc_tx_interval (bs);
+  bfd_recalc_echo_tx_interval (bs);
   bfd_calc_next_tx (bm, bs, now);
 }
 
 static void
-bfd_set_effective_required_min_rx (bfd_main_t * bm,
-				   bfd_session_t * bs,
-				   u64 required_min_rx_nsec)
+bfd_set_effective_required_min_rx (bfd_session_t *bs, u64 required_min_rx_nsec)
 {
   bs->effective_required_min_rx_nsec = required_min_rx_nsec;
   BFD_DBG ("Set effective required min rx to " BFD_CLK_FMT,
 	   BFD_CLK_PRN (bs->effective_required_min_rx_nsec));
-  bfd_recalc_detection_time (bm, bs);
+  bfd_recalc_detection_time (bs);
 }
 
 static void
-bfd_set_remote_required_min_rx (bfd_main_t * bm, bfd_session_t * bs,
-				u64 now, u32 remote_required_min_rx_usec)
+bfd_set_remote_required_min_rx (bfd_session_t *bs,
+				u32 remote_required_min_rx_usec)
 {
   if (bs->remote_min_rx_usec != remote_required_min_rx_usec)
     {
@@ -412,14 +410,13 @@ bfd_set_remote_required_min_rx (bfd_main_t * bm, bfd_session_t * bs,
       bs->remote_min_rx_nsec = bfd_usec_to_nsec (remote_required_min_rx_usec);
       BFD_DBG ("Set remote min rx to " BFD_CLK_FMT,
 	       BFD_CLK_PRN (bs->remote_min_rx_nsec));
-      bfd_recalc_detection_time (bm, bs);
-      bfd_recalc_tx_interval (bm, bs);
+      bfd_recalc_detection_time (bs);
+      bfd_recalc_tx_interval (bs);
     }
 }
 
 static void
-bfd_set_remote_required_min_echo_rx (bfd_main_t * bm, bfd_session_t * bs,
-				     u64 now,
+bfd_set_remote_required_min_echo_rx (bfd_session_t *bs,
 				     u32 remote_required_min_echo_rx_usec)
 {
   if (bs->remote_min_echo_rx_usec != remote_required_min_echo_rx_usec)
@@ -429,7 +426,7 @@ bfd_set_remote_required_min_echo_rx (bfd_main_t * bm, bfd_session_t * bs,
 	bfd_usec_to_nsec (bs->remote_min_echo_rx_usec);
       BFD_DBG ("Set remote min echo rx to " BFD_CLK_FMT,
 	       BFD_CLK_PRN (bs->remote_min_echo_rx_nsec));
-      bfd_recalc_echo_tx_interval (bm, bs);
+      bfd_recalc_echo_tx_interval (bs);
     }
 }
 
@@ -450,8 +447,8 @@ bfd_session_start (bfd_main_t * bm, bfd_session_t * bs)
   BFD_DBG ("\nStarting session: %U", format_bfd_session, bs);
   vlib_log_info (bm->log_class, "start BFD session: %U",
 		 format_bfd_session_brief, bs);
-  bfd_set_effective_required_min_rx (bm, bs, bs->config_required_min_rx_nsec);
-  bfd_recalc_tx_interval (bm, bs);
+  bfd_set_effective_required_min_rx (bs, bs->config_required_min_rx_nsec);
+  bfd_recalc_tx_interval (bs);
   vlib_process_signal_event (bm->vlib_main, bm->bfd_process_node_index,
 			     BFD_EVENT_NEW_SESSION, bs->bs_idx);
   bfd_notify_listeners (bm, BFD_LISTEN_EVENT_CREATE, bs);
@@ -651,8 +648,7 @@ bfd_on_state_change (bfd_main_t * bm, bfd_session_t * bs, u64 now,
 					clib_max
 					(bs->config_desired_min_tx_nsec,
 					 bm->default_desired_min_tx_nsec));
-      bfd_set_effective_required_min_rx (bm, bs,
-					 bs->config_required_min_rx_nsec);
+      bfd_set_effective_required_min_rx (bs, bs->config_required_min_rx_nsec);
       bfd_set_timer (bm, bs, now, handling_wakeup);
       break;
     case BFD_STATE_down:
@@ -661,8 +657,7 @@ bfd_on_state_change (bfd_main_t * bm, bfd_session_t * bs, u64 now,
 					clib_max
 					(bs->config_desired_min_tx_nsec,
 					 bm->default_desired_min_tx_nsec));
-      bfd_set_effective_required_min_rx (bm, bs,
-					 bs->config_required_min_rx_nsec);
+      bfd_set_effective_required_min_rx (bs, bs->config_required_min_rx_nsec);
       bfd_set_timer (bm, bs, now, handling_wakeup);
       break;
     case BFD_STATE_init:
@@ -676,7 +671,7 @@ bfd_on_state_change (bfd_main_t * bm, bfd_session_t * bs, u64 now,
 					bs->config_desired_min_tx_nsec);
       if (BFD_POLL_NOT_NEEDED == bs->poll_state)
 	{
-	  bfd_set_effective_required_min_rx (bm, bs,
+	  bfd_set_effective_required_min_rx (bs,
 					     bs->config_required_min_rx_nsec);
 	}
       bfd_set_timer (bm, bs, now, handling_wakeup);
@@ -694,8 +689,7 @@ bfd_on_state_change (bfd_main_t * bm, bfd_session_t * bs, u64 now,
 }
 
 static void
-bfd_on_config_change (vlib_main_t * vm, vlib_node_runtime_t * rt,
-		      bfd_main_t * bm, bfd_session_t * bs, u64 now)
+bfd_on_config_change (bfd_main_t *bm, bfd_session_t *bs, u64 now)
 {
   /*
    * if remote demand mode is set and we need to do a poll, set the next
@@ -706,7 +700,7 @@ bfd_on_config_change (vlib_main_t * vm, vlib_node_runtime_t * rt,
     {
       bs->tx_timeout_nsec = now;
     }
-  bfd_recalc_detection_time (bm, bs);
+  bfd_recalc_detection_time (bs);
   bfd_set_timer (bm, bs, now, 0);
 }
 
@@ -861,8 +855,7 @@ bfd_is_echo_possible (bfd_session_t * bs)
 }
 
 static void
-bfd_init_control_frame (bfd_main_t * bm, bfd_session_t * bs,
-			vlib_buffer_t * b)
+bfd_init_control_frame (bfd_session_t *bs, vlib_buffer_t *b)
 {
   bfd_pkt_t *pkt = vlib_buffer_get_current (b);
   u32 bfd_length = 0;
@@ -892,8 +885,7 @@ bfd_init_control_frame (bfd_main_t * bm, bfd_session_t * bs,
 }
 
 static void
-bfd_send_echo (vlib_main_t * vm, vlib_node_runtime_t * rt,
-	       bfd_main_t * bm, bfd_session_t * bs, u64 now)
+bfd_send_echo (vlib_main_t *vm, bfd_main_t *bm, bfd_session_t *bs, u64 now)
 {
   if (!bfd_is_echo_possible (bs))
     {
@@ -936,7 +928,7 @@ bfd_send_echo (vlib_main_t * vm, vlib_node_runtime_t * rt,
 	  return;
 	}
       bs->echo_last_tx_nsec = now;
-      bfd_calc_next_echo_tx (bm, bs, now);
+      bfd_calc_next_echo_tx (bs, now);
     }
   else
     {
@@ -947,8 +939,7 @@ bfd_send_echo (vlib_main_t * vm, vlib_node_runtime_t * rt,
 }
 
 static void
-bfd_send_periodic (vlib_main_t * vm, vlib_node_runtime_t * rt,
-		   bfd_main_t * bm, bfd_session_t * bs, u64 now)
+bfd_send_periodic (vlib_main_t *vm, bfd_main_t *bm, bfd_session_t *bs, u64 now)
 {
   if (!bs->remote_min_rx_usec && BFD_POLL_NOT_NEEDED == bs->poll_state)
     {
@@ -980,7 +971,7 @@ bfd_send_periodic (vlib_main_t * vm, vlib_node_runtime_t * rt,
 	}
       vlib_buffer_t *b = vlib_get_buffer (vm, bi);
       ASSERT (b->current_data == 0);
-      bfd_init_control_frame (bm, bs, b);
+      bfd_init_control_frame (bs, b);
       switch (bs->poll_state)
 	{
 	case BFD_POLL_NEEDED:
@@ -1022,12 +1013,11 @@ bfd_send_periodic (vlib_main_t * vm, vlib_node_runtime_t * rt,
 }
 
 void
-bfd_init_final_control_frame (vlib_main_t * vm, vlib_buffer_t * b,
-			      bfd_main_t * bm, bfd_session_t * bs,
-			      int is_local)
+bfd_init_final_control_frame (vlib_main_t *vm, vlib_buffer_t *b,
+			      bfd_session_t *bs)
 {
   BFD_DBG ("Send final control frame for bs_idx=%lu", bs->bs_idx);
-  bfd_init_control_frame (bm, bs, b);
+  bfd_init_control_frame (bs, b);
   bfd_pkt_set_final (vlib_buffer_get_current (b));
   bfd_add_auth_section (vm, b, bs);
   u32 bi = vlib_get_buffer_index (vm, b);
@@ -1069,7 +1059,7 @@ bfd_check_rx_timeout (vlib_main_t * vm, bfd_main_t * bm, bfd_session_t * bs,
        * since it is no longer required to maintain previous session state)
        * and then can transmit at its own rate.
        */
-      bfd_set_remote_required_min_rx (bm, bs, now, 1);
+      bfd_set_remote_required_min_rx (bs, 1);
     }
   else if (bs->echo
 	   && bs->echo_last_rx_nsec +
@@ -1082,21 +1072,19 @@ bfd_check_rx_timeout (vlib_main_t * vm, bfd_main_t * bm, bfd_session_t * bs,
 }
 
 void
-bfd_on_timeout (vlib_main_t * vm, vlib_node_runtime_t * rt, bfd_main_t * bm,
-		bfd_session_t * bs, u64 now)
+bfd_on_timeout (vlib_main_t *vm, bfd_main_t *bm, bfd_session_t *bs, u64 now)
 {
   BFD_DBG ("Timeout for bs_idx=%lu", bs->bs_idx);
   switch (bs->local_state)
     {
     case BFD_STATE_admin_down:
-      bfd_send_periodic (vm, rt, bm, bs, now);
-      break;
+      /* fallthrough */
     case BFD_STATE_down:
-      bfd_send_periodic (vm, rt, bm, bs, now);
+      bfd_send_periodic (vm, bm, bs, now);
       break;
     case BFD_STATE_init:
       bfd_check_rx_timeout (vm, bm, bs, now, 1);
-      bfd_send_periodic (vm, rt, bm, bs, now);
+      bfd_send_periodic (vm, bm, bs, now);
       break;
     case BFD_STATE_up:
       bfd_check_rx_timeout (vm, bm, bs, now, 1);
@@ -1108,16 +1096,15 @@ bfd_on_timeout (vlib_main_t * vm, vlib_node_runtime_t * rt, bfd_main_t * bm,
 	  bs->echo = 1;
 	  bs->echo_last_rx_nsec = now;
 	  bs->echo_tx_timeout_nsec = now;
-	  bfd_set_effective_required_min_rx (bm, bs,
-					     clib_max
-					     (bm->min_required_min_rx_while_echo_nsec,
-					      bs->config_required_min_rx_nsec));
+	  bfd_set_effective_required_min_rx (
+	    bs, clib_max (bm->min_required_min_rx_while_echo_nsec,
+			  bs->config_required_min_rx_nsec));
 	  bfd_set_poll_state (bs, BFD_POLL_NEEDED);
 	}
-      bfd_send_periodic (vm, rt, bm, bs, now);
+      bfd_send_periodic (vm, bm, bs, now);
       if (bs->echo)
 	{
-	  bfd_send_echo (vm, rt, bm, bs, now);
+	  bfd_send_echo (vm, bm, bs, now);
 	}
       break;
     }
@@ -1127,7 +1114,8 @@ bfd_on_timeout (vlib_main_t * vm, vlib_node_runtime_t * rt, bfd_main_t * bm,
  * bfd process node function
  */
 static uword
-bfd_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
+bfd_process (vlib_main_t *vm, CLIB_UNUSED (vlib_node_runtime_t *rt),
+	     CLIB_UNUSED (vlib_frame_t *f))
 {
   bfd_main_t *bm = &bfd_main;
   u32 *expired = 0;
@@ -1168,7 +1156,9 @@ bfd_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
 		now + first_expires_in_ticks * bm->nsec_per_tw_tick;
 	      bm->bfd_process_next_wakeup_nsec = next_expire_nsec;
 	      bfd_unlock (bm);
-	      timeout = (next_expire_nsec - now) * SEC_PER_NSEC;
+	      ASSERT (next_expire_nsec - now <= UINT32_MAX);
+	      // cast to u32 to avoid warning
+	      timeout = (u32) (next_expire_nsec - now) * SEC_PER_NSEC;
 	    }
 	  BFD_DBG ("vlib_process_wait_for_event_or_clock(vm, %.09f)",
 		   timeout);
@@ -1205,7 +1195,7 @@ bfd_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
 	      {
 		bfd_session_t *bs =
 		  pool_elt_at_index (bm->sessions, *session_index);
-		bfd_send_periodic (vm, rt, bm, bs, now);
+		bfd_send_periodic (vm, bm, bs, now);
 		bfd_set_timer (bm, bs, now, 1);
 	      }
 	    else
@@ -1224,7 +1214,7 @@ bfd_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
 	      {
 		bfd_session_t *bs =
 		  pool_elt_at_index (bm->sessions, *session_index);
-		bfd_on_config_change (vm, rt, bm, bs, now);
+		bfd_on_config_change (bm, bs, now);
 	      }
 	    else
 	      {
@@ -1251,7 +1241,7 @@ bfd_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
 	  {
 	    bfd_session_t *bs = pool_elt_at_index (bm->sessions, bs_idx);
 	    bs->tw_id = 0;	/* timer is gone because it expired */
-	    bfd_on_timeout (vm, rt, bm, bs, now);
+	    bfd_on_timeout (vm, bm, bs, now);
 	    bfd_set_timer (bm, bs, now, 1);
 	  }
       }
@@ -1272,7 +1262,6 @@ bfd_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
 /*
  * bfd process node declaration
  */
-/* *INDENT-OFF* */
 VLIB_REGISTER_NODE (bfd_process_node, static) = {
   .function = bfd_process,
   .type = VLIB_NODE_TYPE_PROCESS,
@@ -1280,10 +1269,10 @@ VLIB_REGISTER_NODE (bfd_process_node, static) = {
   .n_next_nodes = 0,
   .next_nodes = {},
 };
-/* *INDENT-ON* */
 
 static clib_error_t *
-bfd_sw_interface_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
+bfd_sw_interface_up_down (CLIB_UNUSED (vnet_main_t *vnm),
+			  CLIB_UNUSED (u32 sw_if_index), u32 flags)
 {
   // bfd_main_t *bm = &bfd_main;
   // vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
@@ -1297,7 +1286,8 @@ bfd_sw_interface_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (bfd_sw_interface_up_down);
 
 static clib_error_t *
-bfd_hw_interface_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
+bfd_hw_interface_up_down (CLIB_UNUSED (vnet_main_t *vnm),
+			  CLIB_UNUSED (u32 hw_if_index), u32 flags)
 {
   // bfd_main_t *bm = &bfd_main;
   if (flags & VNET_HW_INTERFACE_FLAG_LINK_UP)
@@ -1581,8 +1571,8 @@ bfd_verify_pkt_auth_seq_num (vlib_main_t * vm, bfd_session_t * bs,
 
 static int
 bfd_verify_pkt_auth_key_sha1 (vlib_main_t *vm, const bfd_pkt_t *pkt,
-			      u32 pkt_size, bfd_session_t *bs, u8 bfd_key_id,
-			      bfd_auth_key_t *auth_key)
+			      u32 pkt_size, CLIB_UNUSED (bfd_session_t *bs),
+			      u8 bfd_key_id, bfd_auth_key_t *auth_key)
 {
   ASSERT (auth_key->auth_type == BFD_AUTH_TYPE_keyed_sha1 ||
 	  auth_key->auth_type == BFD_AUTH_TYPE_meticulous_keyed_sha1);
@@ -1667,18 +1657,14 @@ bfd_verify_pkt_auth_key (vlib_main_t * vm, const bfd_pkt_t * pkt,
 		    bfd_auth_type_str (auth_key->auth_type));
       return 0;
     case BFD_AUTH_TYPE_simple_password:
-      vlib_log_err (bm->log_class,
-		    "internal error, not implemented, unexpected auth_type=%d:%s",
-		    auth_key->auth_type,
-		    bfd_auth_type_str (auth_key->auth_type));
-      return 0;
+      /* fallthrough */
     case BFD_AUTH_TYPE_keyed_md5:
       /* fallthrough */
     case BFD_AUTH_TYPE_meticulous_keyed_md5:
-      vlib_log_err
-	(bm->log_class,
-	 "internal error, not implemented, unexpected auth_type=%d:%s",
-	 auth_key->auth_type, bfd_auth_type_str (auth_key->auth_type));
+      vlib_log_err (
+	bm->log_class,
+	"internal error, not implemented, unexpected auth_type=%d:%s",
+	auth_key->auth_type, bfd_auth_type_str (auth_key->auth_type));
       return 0;
     case BFD_AUTH_TYPE_keyed_sha1:
       /* fallthrough */
@@ -1839,11 +1825,9 @@ bfd_consume_pkt (vlib_main_t * vm, bfd_main_t * bm, const bfd_pkt_t * pkt,
   bs->remote_desired_min_tx_nsec =
     bfd_usec_to_nsec (clib_net_to_host_u32 (pkt->des_min_tx));
   bs->remote_detect_mult = pkt->head.detect_mult;
-  bfd_set_remote_required_min_rx (bm, bs, now,
-				  clib_net_to_host_u32 (pkt->req_min_rx));
-  bfd_set_remote_required_min_echo_rx (bm, bs, now,
-				       clib_net_to_host_u32
-				       (pkt->req_min_echo_rx));
+  bfd_set_remote_required_min_rx (bs, clib_net_to_host_u32 (pkt->req_min_rx));
+  bfd_set_remote_required_min_echo_rx (
+    bs, clib_net_to_host_u32 (pkt->req_min_echo_rx));
   if (bfd_pkt_get_final (pkt))
     {
       if (BFD_POLL_IN_PROGRESS == bs->poll_state)
@@ -1854,10 +1838,10 @@ bfd_consume_pkt (vlib_main_t * vm, bfd_main_t * bm, const bfd_pkt_t * pkt,
 	    {
 	      bfd_set_effective_desired_min_tx (
 		bm, bs, now, bs->config_desired_min_tx_nsec);
-	      bfd_set_effective_required_min_rx (bm, bs,
-						 clib_max (bs->echo *
-							   bm->min_required_min_rx_while_echo_nsec,
-							   bs->config_required_min_rx_nsec));
+	      bfd_set_effective_required_min_rx (
+		bs,
+		clib_max (bs->echo * bm->min_required_min_rx_while_echo_nsec,
+			  bs->config_required_min_rx_nsec));
 	    }
 	}
       else if (BFD_POLL_IN_PROGRESS_AND_QUEUED == bs->poll_state)
diff --git a/src/vnet/bfd/bfd_main.h b/src/vnet/bfd/bfd_main.h
index 0bdcfb87622..5e9f025c657 100644
--- a/src/vnet/bfd/bfd_main.h
+++ b/src/vnet/bfd/bfd_main.h
@@ -420,9 +420,8 @@ int bfd_verify_pkt_common (const bfd_pkt_t * pkt);
 int bfd_verify_pkt_auth (vlib_main_t * vm, const bfd_pkt_t * pkt,
 			 u16 pkt_size, bfd_session_t * bs);
 void bfd_event (bfd_main_t * bm, bfd_session_t * bs);
-void bfd_init_final_control_frame (vlib_main_t * vm, vlib_buffer_t * b,
-				   bfd_main_t * bm, bfd_session_t * bs,
-				   int is_local);
+void bfd_init_final_control_frame (vlib_main_t *vm, vlib_buffer_t *b,
+				   bfd_session_t *bs);
 u8 *format_bfd_session (u8 * s, va_list * args);
 u8 *format_bfd_session_brief (u8 * s, va_list * args);
 u8 *format_bfd_auth_key (u8 * s, va_list * args);
diff --git a/src/vnet/bfd/bfd_udp.c b/src/vnet/bfd/bfd_udp.c
index a58d9e2e1ca..d8fd4a10529 100644
--- a/src/vnet/bfd/bfd_udp.c
+++ b/src/vnet/bfd/bfd_udp.c
@@ -685,9 +685,8 @@ bfd_udp_find_session_by_api_input (u32 sw_if_index,
 
 static vnet_api_error_t
 bfd_api_verify_common (u32 sw_if_index, u32 desired_min_tx_usec,
-		       u32 required_min_rx_usec, u8 detect_mult,
-		       const ip46_address_t * local_addr,
-		       const ip46_address_t * peer_addr)
+		       u8 detect_mult, const ip46_address_t *local_addr,
+		       const ip46_address_t *peer_addr)
 {
   bfd_udp_main_t *bum = &bfd_udp_main;
   vnet_api_error_t rv =
@@ -781,10 +780,8 @@ bfd_udp_add_session (u32 sw_if_index, const ip46_address_t * local_addr,
   bfd_main_t *bm = &bfd_main;
   bfd_lock (bm);
 
-  vnet_api_error_t rv =
-    bfd_api_verify_common (sw_if_index, desired_min_tx_usec,
-			   required_min_rx_usec, detect_mult,
-			   local_addr, peer_addr);
+  vnet_api_error_t rv = bfd_api_verify_common (
+    sw_if_index, desired_min_tx_usec, detect_mult, local_addr, peer_addr);
 
   if (!rv)
     rv = bfd_udp_add_and_start_session (
@@ -806,8 +803,7 @@ bfd_udp_upd_session (u32 sw_if_index, const ip46_address_t *local_addr,
   bfd_lock (bm);
 
   vnet_api_error_t rv = bfd_api_verify_common (
-    sw_if_index, desired_min_tx_usec, required_min_rx_usec, detect_mult,
-    local_addr, peer_addr);
+    sw_if_index, desired_min_tx_usec, detect_mult, local_addr, peer_addr);
   if (!rv)
     {
       bfd_session_t *bs = NULL;
@@ -1011,7 +1007,7 @@ bfd_udp4_find_headers (vlib_buffer_t * b, ip4_header_t ** ip4,
 {
   /* sanity check first */
   const i32 start = vnet_buffer (b)->l3_hdr_offset;
-  if (start < 0 && start < sizeof (b->pre_data))
+  if (start < -(signed) sizeof (b->pre_data))
     {
       BFD_ERR ("Start of ip header is before pre_data, ignoring");
       *ip4 = NULL;
@@ -1080,8 +1076,7 @@ bfd_rpc_update_session (vlib_main_t * vm, u32 bs_idx, const bfd_pkt_t * pkt)
 }
 
 static bfd_udp_error_t
-bfd_udp4_scan (vlib_main_t * vm, vlib_node_runtime_t * rt,
-	       vlib_buffer_t * b, bfd_session_t ** bs_out)
+bfd_udp4_scan (vlib_main_t *vm, vlib_buffer_t *b, bfd_session_t **bs_out)
 {
   const bfd_pkt_t *pkt = vlib_buffer_get_current (b);
   if (sizeof (*pkt) > b->current_length)
@@ -1158,7 +1153,7 @@ bfd_udp6_find_headers (vlib_buffer_t * b, ip6_header_t ** ip6,
 {
   /* sanity check first */
   const i32 start = vnet_buffer (b)->l3_hdr_offset;
-  if (start < 0 && start < sizeof (b->pre_data))
+  if (start < -(signed) sizeof (b->pre_data))
     {
       BFD_ERR ("Start of ip header is before pre_data, ignoring");
       *ip6 = NULL;
@@ -1222,8 +1217,7 @@ bfd_udp6_verify_transport (const ip6_header_t * ip6,
 }
 
 static bfd_udp_error_t
-bfd_udp6_scan (vlib_main_t * vm, vlib_node_runtime_t * rt,
-	       vlib_buffer_t * b, bfd_session_t ** bs_out)
+bfd_udp6_scan (vlib_main_t *vm, vlib_buffer_t *b, bfd_session_t **bs_out)
 {
   const bfd_pkt_t *pkt = vlib_buffer_get_current (b);
   if (sizeof (*pkt) > b->current_length)
@@ -1325,7 +1319,7 @@ bfd_udp_input (vlib_main_t * vm, vlib_node_runtime_t * rt,
       /* If this pkt is traced, snapshot the data */
       if (b0->flags & VLIB_BUFFER_IS_TRACED)
 	{
-	  int len;
+	  u64 len;
 	  t0 = vlib_add_trace (vm, rt, b0, sizeof (*t0));
 	  len = (b0->current_length < sizeof (t0->data)) ? b0->current_length
 	    : sizeof (t0->data);
@@ -1337,11 +1331,11 @@ bfd_udp_input (vlib_main_t * vm, vlib_node_runtime_t * rt,
       bfd_lock (bm);
       if (is_ipv6)
 	{
-	  error0 = bfd_udp6_scan (vm, rt, b0, &bs);
+	  error0 = bfd_udp6_scan (vm, b0, &bs);
 	}
       else
 	{
-	  error0 = bfd_udp4_scan (vm, rt, b0, &bs);
+	  error0 = bfd_udp4_scan (vm, b0, &bs);
 	}
       b0->error = rt->errors[error0];
 
@@ -1358,8 +1352,7 @@ bfd_udp_input (vlib_main_t * vm, vlib_node_runtime_t * rt,
 	    {
 	      b0->current_data = 0;
 	      b0->current_length = 0;
-	      bfd_init_final_control_frame (vm, b0, bfd_udp_main.bfd_main, bs,
-					    0);
+	      bfd_init_final_control_frame (vm, b0, bs);
 	      if (is_ipv6)
 		{
 		  vlib_node_increment_counter (vm, bfd_udp6_input_node.index,
@@ -1487,7 +1480,7 @@ bfd_udp_echo_input (vlib_main_t * vm, vlib_node_runtime_t * rt,
       /* If this pkt is traced, snapshot the data */
       if (b0->flags & VLIB_BUFFER_IS_TRACED)
 	{
-	  int len;
+	  u64 len;
 	  t0 = vlib_add_trace (vm, rt, b0, sizeof (*t0));
 	  len = (b0->current_length < sizeof (t0->data)) ? b0->current_length
 	    : sizeof (t0->data);
@@ -1607,38 +1600,41 @@ VLIB_REGISTER_NODE (bfd_udp_echo6_input_node, static) = {
 /* *INDENT-ON* */
 
 static clib_error_t *
-bfd_udp_sw_if_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_create)
+bfd_udp_sw_if_add_del (CLIB_UNUSED (vnet_main_t *vnm), u32 sw_if_index,
+		       u32 is_create)
 {
-  bfd_session_t **to_be_freed = NULL;
+  u32 *to_be_freed = NULL;
   bfd_udp_main_t *bum = &bfd_udp_main;
   BFD_DBG ("sw_if_add_del called, sw_if_index=%u, is_create=%u", sw_if_index,
 	   is_create);
   if (!is_create)
     {
       bfd_session_t *bs;
-      pool_foreach (bs, bfd_udp_main.bfd_main->sessions)
-      {
-	if (bs->transport != BFD_TRANSPORT_UDP4 &&
-	    bs->transport != BFD_TRANSPORT_UDP6)
-	  {
-	    continue;
-	  }
-	if (bs->udp.key.sw_if_index != sw_if_index)
-	  {
-	    continue;
-	  }
-	vec_add1 (to_be_freed, bs);
-      }
-    }
-  bfd_session_t **bs;
-  vec_foreach (bs, to_be_freed)
-  {
-    vlib_log_notice (bum->log_class,
-		     "removal of sw_if_index=%u forces removal of bfd session "
-		     "with bs_idx=%u", sw_if_index, (*bs)->bs_idx);
-    bfd_session_set_flags (vlib_get_main (), *bs, 0);
-    bfd_udp_del_session_internal (vlib_get_main (), *bs);
-  }
+      pool_foreach (bs, bum->bfd_main->sessions)
+	{
+	  if (bs->transport != BFD_TRANSPORT_UDP4 &&
+	      bs->transport != BFD_TRANSPORT_UDP6)
+	    {
+	      continue;
+	    }
+	  if (bs->udp.key.sw_if_index != sw_if_index)
+	    {
+	      continue;
+	    }
+	  vec_add1 (to_be_freed, bs->bs_idx);
+	}
+    }
+  u32 *bs_idx;
+  vec_foreach (bs_idx, to_be_freed)
+    {
+      bfd_session_t *bs = pool_elt_at_index (bum->bfd_main->sessions, *bs_idx);
+      vlib_log_notice (bum->log_class,
+		       "removal of sw_if_index=%u forces removal of bfd "
+		       "session with bs_idx=%u",
+		       sw_if_index, bs->bs_idx);
+      bfd_session_set_flags (vlib_get_main (), bs, 0);
+      bfd_udp_del_session_internal (vlib_get_main (), bs);
+    }
   return 0;
 }