diff options
| author |   Juraj Sloboda <jsloboda@cisco.com> | 2017-04-03 07:34:57 +0200 |
|---|---|---|
| committer |   Ole Trøan <otroan@employees.org> | 2017-04-10 09:02:02 +0000 |
| commit | c3827738daf0955445212ad622e7259ad9480141 (patch) | |
| tree | 3656482ecd9bd0dcab71a6edd179a33856e6a305 /src/plugins/snat/out2in.c | |
| parent | ded2193b85f6f3a8e8b20d839c0289a836ecf6a4 (diff) | |
Handle ICMP echo with TTL=1 in deterministic and fast SNAT nodes
Change-Id: Icd25ec2e5faf69898178199aa44f21790ce664e1
Signed-off-by: Juraj Sloboda <jsloboda@cisco.com>
Diffstat (limited to 'src/plugins/snat/out2in.c')
| -rw-r--r-- | src/plugins/snat/out2in.c | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/src/plugins/snat/out2in.c b/src/plugins/snat/out2in.c index 13355043658..b52402cedd5 100644 --- a/src/plugins/snat/out2in.c +++ b/src/plugins/snat/out2in.c @@ -1234,6 +1234,16 @@ snat_det_out2in_node_fn (vlib_main_t * vm, sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + if (PREDICT_FALSE(ip0->ttl == 1)) + { + vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR; + goto trace0; + } + key0.ext_host_addr = ip0->src_address; key0.ext_host_port = tcp0->src; key0.out_port = tcp0->dst; @@ -1329,6 +1339,16 @@ snat_det_out2in_node_fn (vlib_main_t * vm, sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX]; + if (PREDICT_FALSE(ip1->ttl == 1)) + { + vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next1 = SNAT_OUT2IN_NEXT_ICMP_ERROR; + goto trace1; + } + key1.ext_host_addr = ip1->src_address; key1.ext_host_port = tcp1->src; key1.out_port = tcp1->dst; @@ -1455,6 +1475,16 @@ snat_det_out2in_node_fn (vlib_main_t * vm, sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + if (PREDICT_FALSE(ip0->ttl == 1)) + { + vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR; + goto trace00; + } + key0.ext_host_addr = ip0->src_address; key0.ext_host_port = tcp0->src; key0.out_port = tcp0->dst; @@ -1569,12 +1599,13 @@ VLIB_REGISTER_NODE (snat_det_out2in_node) = { .runtime_data_bytes = sizeof (snat_runtime_t), - .n_next_nodes = 2, + .n_next_nodes = SNAT_OUT2IN_N_NEXT, /* edit / add dispositions here */ .next_nodes = { [SNAT_OUT2IN_NEXT_DROP] = "error-drop", [SNAT_OUT2IN_NEXT_LOOKUP] = "ip4-lookup", + [SNAT_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error", }, }; VLIB_NODE_FUNCTION_MULTIARCH (snat_det_out2in_node, snat_det_out2in_node_fn); @@ -1800,6 +1831,16 @@ snat_out2in_fast_node_fn (vlib_main_t * vm, vnet_feature_next (sw_if_index0, &next0, b0); + if (PREDICT_FALSE(ip0->ttl == 1)) + { + vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR; + goto trace00; + } + proto0 = ip_proto_to_snat_proto (ip0->protocol); if (PREDICT_FALSE (proto0 == ~0)) |