diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/vnet/mpls/mpls_output.c | 164 |
1 files changed, 80 insertions, 84 deletions
diff --git a/src/vnet/mpls/mpls_output.c b/src/vnet/mpls/mpls_output.c index a1d2d3baa88..3699163a155 100644 --- a/src/vnet/mpls/mpls_output.c +++ b/src/vnet/mpls/mpls_output.c @@ -411,90 +411,86 @@ mpls_frag (vlib_main_t * vm, u32 pi0, adj_index0; ip_frag_error_t error0 = IP_FRAG_ERROR_NONE; i16 encap_size; - u8 is_ip4; - - pi0 = to_next[0] = from[0]; - p0 = vlib_get_buffer (vm, pi0); - from += 1; - n_left_from -= 1; - is_ip4 = vnet_buffer (p0)->mpls.pyld_proto == DPO_PROTO_IP4; - - adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX]; - adj0 = adj_get(adj_index0); - - /* the size of the MPLS stack */ - encap_size = vnet_buffer(p0)->l3_hdr_offset - p0->current_data; - - /* IP fragmentation */ - if (is_ip4) - error0 = ip4_frag_do_fragment (vm, pi0, - adj0->rewrite_header.max_l3_packet_bytes, - encap_size, &frags); - else - error0 = ip6_frag_do_fragment (vm, pi0, - adj0->rewrite_header.max_l3_packet_bytes, - encap_size, &frags); - - if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED)) - { - mpls_frag_trace_t *tr = - vlib_add_trace (vm, node, p0, sizeof (*tr)); - tr->mtu = adj0->rewrite_header.max_l3_packet_bytes; - tr->pkt_size = vlib_buffer_length_in_chain(vm, p0); - } - - if (PREDICT_TRUE(error0 == IP_FRAG_ERROR_NONE)) - { - /* Free original buffer chain */ - vlib_buffer_free_one (vm, pi0); /* Free original packet */ - next0 = (IP_LOOKUP_NEXT_MIDCHAIN == adj0->lookup_next_index ? - MPLS_FRAG_NEXT_REWRITE_MIDCHAIN : - MPLS_FRAG_NEXT_REWRITE); - } - else if (is_ip4 && error0 == IP_FRAG_ERROR_DONT_FRAGMENT_SET) - { - icmp4_error_set_vnet_buffer ( - p0, ICMP4_destination_unreachable, - ICMP4_destination_unreachable_fragmentation_needed_and_dont_fragment_set, - vnet_buffer (p0)->ip_frag.mtu); - next0 = MPLS_FRAG_NEXT_ICMP_ERROR; - } - else - { - vlib_error_count (vm, mpls_output_node.index, error0, 1); - vec_add1 (frags, pi0); /* Get rid of the original buffer */ - next0 = MPLS_FRAG_NEXT_DROP; - } - - /* Send fragments that were added in the frame */ - u32 *frag_from, frag_left; - - frag_from = frags; - frag_left = vec_len (frags); - - while (frag_left > 0) - { - while (frag_left > 0 && n_left_to_next > 0) - { - u32 i; - i = to_next[0] = frag_from[0]; - frag_from += 1; - frag_left -= 1; - to_next += 1; - n_left_to_next -= 1; - - p0 = vlib_get_buffer (vm, i); - p0->error = error_node->errors[error0]; - - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, - to_next, n_left_to_next, i, - next0); - } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - vlib_get_next_frame (vm, node, next_index, to_next, - n_left_to_next); - } - vec_reset_length (frags); + u16 mtu; + u8 is_ip4; + + pi0 = to_next[0] = from[0]; + p0 = vlib_get_buffer (vm, pi0); + from += 1; + n_left_from -= 1; + is_ip4 = vnet_buffer (p0)->mpls.pyld_proto == DPO_PROTO_IP4; + + adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX]; + adj0 = adj_get (adj_index0); + /* the size of the MPLS stack */ + encap_size = vnet_buffer (p0)->l3_hdr_offset - p0->current_data; + mtu = adj0->rewrite_header.max_l3_packet_bytes - encap_size; + + /* IP fragmentation */ + if (is_ip4) + error0 = ip4_frag_do_fragment (vm, pi0, mtu, encap_size, &frags); + else + error0 = ip6_frag_do_fragment (vm, pi0, mtu, encap_size, &frags); + + if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED)) + { + mpls_frag_trace_t *tr = + vlib_add_trace (vm, node, p0, sizeof (*tr)); + tr->mtu = mtu; + tr->pkt_size = vlib_buffer_length_in_chain (vm, p0); + } + + if (PREDICT_TRUE (error0 == IP_FRAG_ERROR_NONE)) + { + /* Free original buffer chain */ + vlib_buffer_free_one (vm, pi0); /* Free original packet */ + next0 = (IP_LOOKUP_NEXT_MIDCHAIN == adj0->lookup_next_index ? + MPLS_FRAG_NEXT_REWRITE_MIDCHAIN : + MPLS_FRAG_NEXT_REWRITE); + } + else if (is_ip4 && error0 == IP_FRAG_ERROR_DONT_FRAGMENT_SET) + { + icmp4_error_set_vnet_buffer ( + p0, ICMP4_destination_unreachable, + ICMP4_destination_unreachable_fragmentation_needed_and_dont_fragment_set, + vnet_buffer (p0)->ip_frag.mtu); + next0 = MPLS_FRAG_NEXT_ICMP_ERROR; + } + else + { + vlib_error_count (vm, mpls_output_node.index, error0, 1); + vec_add1 (frags, pi0); /* Get rid of the original buffer */ + next0 = MPLS_FRAG_NEXT_DROP; + } + + /* Send fragments that were added in the frame */ + u32 *frag_from, frag_left; + + frag_from = frags; + frag_left = vec_len (frags); + + while (frag_left > 0) + { + while (frag_left > 0 && n_left_to_next > 0) + { + u32 i; + i = to_next[0] = frag_from[0]; + frag_from += 1; + frag_left -= 1; + to_next += 1; + n_left_to_next -= 1; + + p0 = vlib_get_buffer (vm, i); + p0->error = error_node->errors[error0]; + + vlib_validate_buffer_enqueue_x1 ( + vm, node, next_index, to_next, n_left_to_next, i, next0); + } + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + vlib_get_next_frame (vm, node, next_index, to_next, + n_left_to_next); + } + vec_reset_length (frags); } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } |