diff options
Diffstat (limited to 'src/vnet/ip')
| -rw-r--r-- | src/vnet/ip/ip4_forward.c | 43 |
1 files changed, 30 insertions, 13 deletions
diff --git a/src/vnet/ip/ip4_forward.c b/src/vnet/ip/ip4_forward.c index ae4510626d0..b9875d72b8e 100644 --- a/src/vnet/ip/ip4_forward.c +++ b/src/vnet/ip/ip4_forward.c @@ -2109,16 +2109,26 @@ ip4_rewrite_inline (vlib_main_t * vm, vnet_buffer (p1)->ip.save_rewrite_length = rw_len1; /* Check MTU of outgoing interface. */ - error0 = - (vlib_buffer_length_in_chain (vm, p0) > - adj0[0]. - rewrite_header.max_l3_packet_bytes ? IP4_ERROR_MTU_EXCEEDED : - error0); - error1 = - (vlib_buffer_length_in_chain (vm, p1) > - adj1[0]. - rewrite_header.max_l3_packet_bytes ? IP4_ERROR_MTU_EXCEEDED : - error1); + if (vlib_buffer_length_in_chain (vm, p0) > + adj0[0].rewrite_header.max_l3_packet_bytes) + { + error0 = IP4_ERROR_MTU_EXCEEDED; + next0 = IP4_REWRITE_NEXT_ICMP_ERROR; + icmp4_error_set_vnet_buffer + (p0, ICMP4_destination_unreachable, + ICMP4_destination_unreachable_fragmentation_needed_and_dont_fragment_set, + 0); + } + if (vlib_buffer_length_in_chain (vm, p1) > + adj1[0].rewrite_header.max_l3_packet_bytes) + { + error1 = IP4_ERROR_MTU_EXCEEDED; + next1 = IP4_REWRITE_NEXT_ICMP_ERROR; + icmp4_error_set_vnet_buffer + (p1, ICMP4_destination_unreachable, + ICMP4_destination_unreachable_fragmentation_needed_and_dont_fragment_set, + 0); + } if (is_mcast) { @@ -2290,9 +2300,16 @@ ip4_rewrite_inline (vlib_main_t * vm, vlib_buffer_length_in_chain (vm, p0) + rw_len0); /* Check MTU of outgoing interface. */ - error0 = (vlib_buffer_length_in_chain (vm, p0) - > adj0[0].rewrite_header.max_l3_packet_bytes - ? IP4_ERROR_MTU_EXCEEDED : error0); + if (vlib_buffer_length_in_chain (vm, p0) > + adj0[0].rewrite_header.max_l3_packet_bytes) + { + error0 = IP4_ERROR_MTU_EXCEEDED; + next0 = IP4_REWRITE_NEXT_ICMP_ERROR; + icmp4_error_set_vnet_buffer + (p0, ICMP4_destination_unreachable, + ICMP4_destination_unreachable_fragmentation_needed_and_dont_fragment_set, + 0); + } if (is_mcast) { error0 = ((adj0[0].rewrite_header.sw_if_index == |