diff options
Diffstat (limited to 'src/plugins/ping/ping.c')
| -rw-r--r-- | src/plugins/ping/ping.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/src/plugins/ping/ping.c b/src/plugins/ping/ping.c index 06cf7dde456..2cc6b771268 100644 --- a/src/plugins/ping/ping.c +++ b/src/plugins/ping/ping.c @@ -576,6 +576,188 @@ VLIB_REGISTER_NODE (ip4_icmp_echo_request_node,static) = { }; /* *INDENT-ON* */ +typedef enum +{ + ICMP6_ECHO_REQUEST_NEXT_LOOKUP, + ICMP6_ECHO_REQUEST_NEXT_OUTPUT, + ICMP6_ECHO_REQUEST_N_NEXT, +} icmp6_echo_request_next_t; + +static uword +ip6_icmp_echo_request (vlib_main_t *vm, vlib_node_runtime_t *node, + vlib_frame_t *frame) +{ + u32 *from, *to_next; + u32 n_left_from, n_left_to_next, next_index; + ip6_main_t *im = &ip6_main; + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + next_index = node->cached_next_index; + + if (node->flags & VLIB_NODE_FLAG_TRACE) + vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors, + /* stride */ 1, + sizeof (icmp6_input_trace_t)); + + while (n_left_from > 0) + { + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + + while (n_left_from > 2 && n_left_to_next > 2) + { + vlib_buffer_t *p0, *p1; + ip6_header_t *ip0, *ip1; + icmp46_header_t *icmp0, *icmp1; + ip6_address_t tmp0, tmp1; + ip_csum_t sum0, sum1; + u32 bi0, bi1; + u32 fib_index0, fib_index1; + u32 next0 = ICMP6_ECHO_REQUEST_NEXT_LOOKUP; + u32 next1 = ICMP6_ECHO_REQUEST_NEXT_LOOKUP; + + bi0 = to_next[0] = from[0]; + bi1 = to_next[1] = from[1]; + + from += 2; + n_left_from -= 2; + to_next += 2; + n_left_to_next -= 2; + + p0 = vlib_get_buffer (vm, bi0); + p1 = vlib_get_buffer (vm, bi1); + ip0 = vlib_buffer_get_current (p0); + ip1 = vlib_buffer_get_current (p1); + icmp0 = ip6_next_header (ip0); + icmp1 = ip6_next_header (ip1); + + /* Check icmp type to echo reply and update icmp checksum. */ + sum0 = icmp0->checksum; + sum1 = icmp1->checksum; + + ASSERT (icmp0->type == ICMP6_echo_request); + ASSERT (icmp1->type == ICMP6_echo_request); + sum0 = ip_csum_update (sum0, ICMP6_echo_request, ICMP6_echo_reply, + icmp46_header_t, type); + sum1 = ip_csum_update (sum1, ICMP6_echo_request, ICMP6_echo_reply, + icmp46_header_t, type); + + icmp0->checksum = ip_csum_fold (sum0); + icmp1->checksum = ip_csum_fold (sum1); + + icmp0->type = ICMP6_echo_reply; + icmp1->type = ICMP6_echo_reply; + + /* Swap source and destination address. */ + tmp0 = ip0->src_address; + tmp1 = ip1->src_address; + + ip0->src_address = ip0->dst_address; + ip1->src_address = ip1->dst_address; + + ip0->dst_address = tmp0; + ip1->dst_address = tmp1; + + /* New hop count. */ + ip0->hop_limit = im->host_config.ttl; + ip1->hop_limit = im->host_config.ttl; + + /* Determine the correct lookup fib indices... */ + fib_index0 = vec_elt (im->fib_index_by_sw_if_index, + vnet_buffer (p0)->sw_if_index[VLIB_RX]); + vnet_buffer (p0)->sw_if_index[VLIB_TX] = fib_index0; + /* Determine the correct lookup fib indices... */ + fib_index1 = vec_elt (im->fib_index_by_sw_if_index, + vnet_buffer (p1)->sw_if_index[VLIB_RX]); + vnet_buffer (p1)->sw_if_index[VLIB_TX] = fib_index1; + + p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED; + p1->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED; + + /* verify speculative enqueues, maybe switch current next frame */ + /* if next0==next1==next_index then nothing special needs to be done + */ + vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next, + n_left_to_next, bi0, bi1, next0, + next1); + } + + while (n_left_from > 0 && n_left_to_next > 0) + { + vlib_buffer_t *p0; + ip6_header_t *ip0; + icmp46_header_t *icmp0; + u32 bi0; + ip6_address_t tmp0; + ip_csum_t sum0; + u32 fib_index0; + u32 next0 = ICMP6_ECHO_REQUEST_NEXT_LOOKUP; + + bi0 = to_next[0] = from[0]; + + from += 1; + n_left_from -= 1; + to_next += 1; + n_left_to_next -= 1; + + p0 = vlib_get_buffer (vm, bi0); + ip0 = vlib_buffer_get_current (p0); + icmp0 = ip6_next_header (ip0); + + /* Check icmp type to echo reply and update icmp checksum. */ + sum0 = icmp0->checksum; + + ASSERT (icmp0->type == ICMP6_echo_request); + sum0 = ip_csum_update (sum0, ICMP6_echo_request, ICMP6_echo_reply, + icmp46_header_t, type); + + icmp0->checksum = ip_csum_fold (sum0); + + icmp0->type = ICMP6_echo_reply; + + /* Swap source and destination address. */ + tmp0 = ip0->src_address; + ip0->src_address = ip0->dst_address; + ip0->dst_address = tmp0; + + ip0->hop_limit = im->host_config.ttl; + + /* if the packet is link local, we'll bounce through the link-local + * table with the RX interface correctly set */ + fib_index0 = vec_elt (im->fib_index_by_sw_if_index, + vnet_buffer (p0)->sw_if_index[VLIB_RX]); + vnet_buffer (p0)->sw_if_index[VLIB_TX] = fib_index0; + + p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED; + /* Verify speculative enqueue, maybe switch current next frame */ + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, + n_left_to_next, bi0, next0); + } + + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + + vlib_error_count (vm, ip6_icmp_input_node.index, + ICMP6_ERROR_ECHO_REPLIES_SENT, frame->n_vectors); + + return frame->n_vectors; +} + +VLIB_REGISTER_NODE (ip6_icmp_echo_request_node,static) = { + .function = ip6_icmp_echo_request, + .name = "ip6-icmp-echo-request", + + .vector_size = sizeof (u32), + + .format_trace = format_icmp6_input_trace, + + .n_next_nodes = ICMP6_ECHO_REQUEST_N_NEXT, + .next_nodes = { + [ICMP6_ECHO_REQUEST_NEXT_LOOKUP] = "ip6-lookup", + [ICMP6_ECHO_REQUEST_NEXT_OUTPUT] = "interface-output", + }, +}; + /* * A swarm of address-family agnostic helper functions * for building and sending the ICMP echo request. @@ -1481,6 +1663,8 @@ ping_cli_init (vlib_main_t * vm) ip4_icmp_register_type (vm, ICMP4_echo_request, ip4_icmp_echo_request_node.index); + icmp6_register_type (vm, ICMP6_echo_request, + ip6_icmp_echo_request_node.index); return 0; } |