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-rw-r--r--src/vnet/ip/icmp6.c882
1 files changed, 882 insertions, 0 deletions
diff --git a/src/vnet/ip/icmp6.c b/src/vnet/ip/icmp6.c
new file mode 100644
index 00000000000..70696d0c6cb
--- /dev/null
+++ b/src/vnet/ip/icmp6.c
@@ -0,0 +1,882 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ * ip/icmp6.c: ip6 icmp
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/ip/ip.h>
+#include <vnet/pg/pg.h>
+
+static u8 *
+format_ip6_icmp_type_and_code (u8 * s, va_list * args)
+{
+ icmp6_type_t type = va_arg (*args, int);
+ u8 code = va_arg (*args, int);
+ char *t = 0;
+
+#define _(n,f) case n: t = #f; break;
+
+ switch (type)
+ {
+ foreach_icmp6_type;
+
+ default:
+ break;
+ }
+
+#undef _
+
+ if (!t)
+ return format (s, "unknown 0x%x", type);
+
+ s = format (s, "%s", t);
+
+ t = 0;
+ switch ((type << 8) | code)
+ {
+#define _(a,n,f) case (ICMP6_##a << 8) | (n): t = #f; break;
+
+ foreach_icmp6_code;
+
+#undef _
+ }
+
+ if (t)
+ s = format (s, " %s", t);
+
+ return s;
+}
+
+static u8 *
+format_icmp6_header (u8 * s, va_list * args)
+{
+ icmp46_header_t *icmp = va_arg (*args, icmp46_header_t *);
+ u32 max_header_bytes = va_arg (*args, u32);
+
+ /* Nothing to do. */
+ if (max_header_bytes < sizeof (icmp[0]))
+ return format (s, "ICMP header truncated");
+
+ s = format (s, "ICMP %U checksum 0x%x",
+ format_ip6_icmp_type_and_code, icmp->type, icmp->code,
+ clib_net_to_host_u16 (icmp->checksum));
+
+ if (max_header_bytes >=
+ sizeof (icmp6_neighbor_solicitation_or_advertisement_header_t) &&
+ (icmp->type == ICMP6_neighbor_solicitation ||
+ icmp->type == ICMP6_neighbor_advertisement))
+ {
+ icmp6_neighbor_solicitation_or_advertisement_header_t *icmp6_nd =
+ (icmp6_neighbor_solicitation_or_advertisement_header_t *) icmp;
+ s = format (s, "\n target address %U",
+ format_ip6_address, &icmp6_nd->target_address);
+ }
+
+ return s;
+}
+
+u8 *
+format_icmp6_input_trace (u8 * s, va_list * va)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
+ icmp6_input_trace_t *t = va_arg (*va, icmp6_input_trace_t *);
+
+ s = format (s, "%U",
+ format_ip6_header, t->packet_data, sizeof (t->packet_data));
+
+ return s;
+}
+
+static char *icmp_error_strings[] = {
+#define _(f,s) s,
+ foreach_icmp6_error
+#undef _
+};
+
+typedef enum
+{
+ ICMP_INPUT_NEXT_DROP,
+ ICMP_INPUT_N_NEXT,
+} icmp_input_next_t;
+
+typedef struct
+{
+ uword *type_and_code_by_name;
+
+ uword *type_by_name;
+
+ /* Vector dispatch table indexed by [icmp type]. */
+ u8 input_next_index_by_type[256];
+
+ /* Max valid code indexed by icmp type. */
+ u8 max_valid_code_by_type[256];
+
+ /* hop_limit must be >= this value for this icmp type. */
+ u8 min_valid_hop_limit_by_type[256];
+
+ u8 min_valid_length_by_type[256];
+} icmp6_main_t;
+
+icmp6_main_t icmp6_main;
+
+static uword
+ip6_icmp_input (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ icmp6_main_t *im = &icmp6_main;
+ u32 *from, *to_next;
+ u32 n_left_from, n_left_to_next, next_index;
+
+ 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 > 0 && n_left_to_next > 0)
+ {
+ vlib_buffer_t *b0;
+ ip6_header_t *ip0;
+ icmp46_header_t *icmp0;
+ icmp6_type_t type0;
+ u32 bi0, next0, error0, len0;
+
+ bi0 = to_next[0] = from[0];
+
+ from += 1;
+ n_left_from -= 1;
+ to_next += 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ ip0 = vlib_buffer_get_current (b0);
+ icmp0 = ip6_next_header (ip0);
+ type0 = icmp0->type;
+
+ error0 = ICMP6_ERROR_NONE;
+
+ next0 = im->input_next_index_by_type[type0];
+ error0 =
+ next0 == ICMP_INPUT_NEXT_DROP ? ICMP6_ERROR_UNKNOWN_TYPE : error0;
+
+ /* Check code is valid for type. */
+ error0 =
+ icmp0->code >
+ im->max_valid_code_by_type[type0] ?
+ ICMP6_ERROR_INVALID_CODE_FOR_TYPE : error0;
+
+ /* Checksum is already validated by ip6_local node so we don't need to check that. */
+
+ /* Check that hop limit == 255 for certain types. */
+ error0 =
+ ip0->hop_limit <
+ im->min_valid_hop_limit_by_type[type0] ?
+ ICMP6_ERROR_INVALID_HOP_LIMIT_FOR_TYPE : error0;
+
+ len0 = clib_net_to_host_u16 (ip0->payload_length);
+ error0 =
+ len0 <
+ im->min_valid_length_by_type[type0] ?
+ ICMP6_ERROR_LENGTH_TOO_SMALL_FOR_TYPE : error0;
+
+ b0->error = node->errors[error0];
+
+ next0 = error0 != ICMP6_ERROR_NONE ? ICMP_INPUT_NEXT_DROP : next0;
+
+ 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);
+ }
+
+ return frame->n_vectors;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip6_icmp_input_node) = {
+ .function = ip6_icmp_input,
+ .name = "ip6-icmp-input",
+
+ .vector_size = sizeof (u32),
+
+ .format_trace = format_icmp6_input_trace,
+
+ .n_errors = ARRAY_LEN (icmp_error_strings),
+ .error_strings = icmp_error_strings,
+
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [ICMP_INPUT_NEXT_DROP] = "error-drop",
+ },
+};
+/* *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;
+
+ if (ip6_address_is_link_local_unicast (&ip0->dst_address))
+ {
+ ethernet_header_t *eth0;
+ u8 tmp_mac[6];
+ /* For link local, reuse current MAC header by sawpping
+ * SMAC to DMAC instead of IP6 lookup since link local
+ * is not in the IP6 FIB */
+ vlib_buffer_reset (p0);
+ eth0 = vlib_buffer_get_current (p0);
+ clib_memcpy (tmp_mac, eth0->dst_address, 6);
+ clib_memcpy (eth0->dst_address, eth0->src_address, 6);
+ clib_memcpy (eth0->src_address, tmp_mac, 6);
+ vnet_buffer (p0)->sw_if_index[VLIB_TX] =
+ vnet_buffer (p0)->sw_if_index[VLIB_RX];
+ next0 = ICMP6_ECHO_REQUEST_NEXT_OUTPUT;
+ }
+ else
+ {
+ /* 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;
+ }
+
+ if (ip6_address_is_link_local_unicast (&ip1->dst_address))
+ {
+ ethernet_header_t *eth1;
+ u8 tmp_mac[6];
+ /* For link local, reuse current MAC header by sawpping
+ * SMAC to DMAC instead of IP6 lookup since link local
+ * is not in the IP6 FIB */
+ vlib_buffer_reset (p1);
+ eth1 = vlib_buffer_get_current (p1);
+ clib_memcpy (tmp_mac, eth1->dst_address, 6);
+ clib_memcpy (eth1->dst_address, eth1->src_address, 6);
+ clib_memcpy (eth1->src_address, tmp_mac, 6);
+ vnet_buffer (p1)->sw_if_index[VLIB_TX] =
+ vnet_buffer (p1)->sw_if_index[VLIB_RX];
+ next1 = ICMP6_ECHO_REQUEST_NEXT_OUTPUT;
+ }
+ else
+ {
+ /* 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;
+ }
+
+ vnet_buffer (p0)->sw_if_index[VLIB_RX]
+ = vnet_main.local_interface_sw_if_index;
+ vnet_buffer (p1)->sw_if_index[VLIB_RX]
+ = vnet_main.local_interface_sw_if_index;
+
+ /* 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 (ip6_address_is_link_local_unicast (&ip0->dst_address))
+ {
+ ethernet_header_t *eth0;
+ u8 tmp_mac[6];
+ /* For link local, reuse current MAC header by sawpping
+ * SMAC to DMAC instead of IP6 lookup since link local
+ * is not in the IP6 FIB */
+ vlib_buffer_reset (p0);
+ eth0 = vlib_buffer_get_current (p0);
+ clib_memcpy (tmp_mac, eth0->dst_address, 6);
+ clib_memcpy (eth0->dst_address, eth0->src_address, 6);
+ clib_memcpy (eth0->src_address, tmp_mac, 6);
+ vnet_buffer (p0)->sw_if_index[VLIB_TX] =
+ vnet_buffer (p0)->sw_if_index[VLIB_RX];
+ next0 = ICMP6_ECHO_REQUEST_NEXT_OUTPUT;
+ }
+ else
+ {
+ 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;
+ }
+ vnet_buffer (p0)->sw_if_index[VLIB_RX]
+ = vnet_main.local_interface_sw_if_index;
+
+ /* 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;
+}
+
+/* *INDENT-OFF* */
+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",
+ },
+};
+/* *INDENT-ON* */
+
+typedef enum
+{
+ IP6_ICMP_ERROR_NEXT_DROP,
+ IP6_ICMP_ERROR_NEXT_LOOKUP,
+ IP6_ICMP_ERROR_N_NEXT,
+} ip6_icmp_error_next_t;
+
+void
+icmp6_error_set_vnet_buffer (vlib_buffer_t * b, u8 type, u8 code, u32 data)
+{
+ vnet_buffer (b)->ip.icmp.type = type;
+ vnet_buffer (b)->ip.icmp.code = code;
+ vnet_buffer (b)->ip.icmp.data = data;
+}
+
+static u8
+icmp6_icmp_type_to_error (u8 type)
+{
+ switch (type)
+ {
+ case ICMP6_destination_unreachable:
+ return ICMP6_ERROR_DEST_UNREACH_SENT;
+ case ICMP6_packet_too_big:
+ return ICMP6_ERROR_PACKET_TOO_BIG_SENT;
+ case ICMP6_time_exceeded:
+ return ICMP6_ERROR_TTL_EXPIRE_SENT;
+ case ICMP6_parameter_problem:
+ return ICMP6_ERROR_PARAM_PROBLEM_SENT;
+ default:
+ return ICMP6_ERROR_DROP;
+ }
+}
+
+static uword
+ip6_icmp_error (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ u32 *from, *to_next;
+ uword n_left_from, n_left_to_next;
+ ip6_icmp_error_next_t next_index;
+ ip6_main_t *im = &ip6_main;
+ ip_lookup_main_t *lm = &im->lookup_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 > 0 && n_left_to_next > 0)
+ {
+ u32 pi0 = from[0];
+ u32 next0 = IP6_ICMP_ERROR_NEXT_LOOKUP;
+ u8 error0 = ICMP6_ERROR_NONE;
+ vlib_buffer_t *p0;
+ ip6_header_t *ip0, *out_ip0;
+ icmp46_header_t *icmp0;
+ u32 sw_if_index0, if_add_index0;
+ int bogus_length;
+
+ /* Speculatively enqueue p0 to the current next frame */
+ to_next[0] = pi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ p0 = vlib_get_buffer (vm, pi0);
+ ip0 = vlib_buffer_get_current (p0);
+ sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
+
+ /* RFC4443 says to keep as much of the original packet as possible
+ * within the minimum MTU. We cheat "a little" here by keeping whatever fits
+ * in the first buffer, to be more efficient */
+ if (PREDICT_FALSE (p0->total_length_not_including_first_buffer))
+ { /* clear current_length of all other buffers in chain */
+ vlib_buffer_t *b = p0;
+ p0->total_length_not_including_first_buffer = 0;
+ while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
+ {
+ b = vlib_get_buffer (vm, b->next_buffer);
+ b->current_length = 0;
+ }
+ }
+ p0->current_length =
+ p0->current_length > 1280 ? 1280 : p0->current_length;
+
+ /* Add IP header and ICMPv6 header including a 4 byte data field */
+ vlib_buffer_advance (p0,
+ -sizeof (ip6_header_t) -
+ sizeof (icmp46_header_t) - 4);
+ out_ip0 = vlib_buffer_get_current (p0);
+ icmp0 = (icmp46_header_t *) & out_ip0[1];
+
+ /* Fill ip header fields */
+ out_ip0->ip_version_traffic_class_and_flow_label =
+ clib_host_to_net_u32 (0x6 << 28);
+
+ out_ip0->payload_length =
+ clib_host_to_net_u16 (p0->current_length - sizeof (ip6_header_t));
+ out_ip0->protocol = IP_PROTOCOL_ICMP6;
+ out_ip0->hop_limit = 0xff;
+ out_ip0->dst_address = ip0->src_address;
+ if_add_index0 =
+ lm->if_address_pool_index_by_sw_if_index[sw_if_index0];
+ if (PREDICT_TRUE (if_add_index0 != ~0))
+ {
+ ip_interface_address_t *if_add =
+ pool_elt_at_index (lm->if_address_pool, if_add_index0);
+ ip6_address_t *if_ip =
+ ip_interface_address_get_address (lm, if_add);
+ out_ip0->src_address = *if_ip;
+ }
+ else /* interface has no IP6 address - should not happen */
+ {
+ next0 = IP6_ICMP_ERROR_NEXT_DROP;
+ error0 = ICMP6_ERROR_DROP;
+ }
+
+ /* Fill icmp header fields */
+ icmp0->type = vnet_buffer (p0)->ip.icmp.type;
+ icmp0->code = vnet_buffer (p0)->ip.icmp.code;
+ *((u32 *) (icmp0 + 1)) =
+ clib_host_to_net_u32 (vnet_buffer (p0)->ip.icmp.data);
+ icmp0->checksum = 0;
+ icmp0->checksum =
+ ip6_tcp_udp_icmp_compute_checksum (vm, p0, out_ip0,
+ &bogus_length);
+
+
+
+ /* Update error status */
+ if (error0 == ICMP6_ERROR_NONE)
+ error0 = icmp6_icmp_type_to_error (icmp0->type);
+ vlib_error_count (vm, node->node_index, error0, 1);
+
+ /* Verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ pi0, next0);
+ }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ return frame->n_vectors;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip6_icmp_error_node) = {
+ .function = ip6_icmp_error,
+ .name = "ip6-icmp-error",
+ .vector_size = sizeof (u32),
+
+ .n_errors = ARRAY_LEN (icmp_error_strings),
+ .error_strings = icmp_error_strings,
+
+ .n_next_nodes = IP6_ICMP_ERROR_N_NEXT,
+ .next_nodes = {
+ [IP6_ICMP_ERROR_NEXT_DROP] = "error-drop",
+ [IP6_ICMP_ERROR_NEXT_LOOKUP] = "ip6-lookup",
+ },
+
+ .format_trace = format_icmp6_input_trace,
+};
+/* *INDENT-ON* */
+
+
+static uword
+unformat_icmp_type_and_code (unformat_input_t * input, va_list * args)
+{
+ icmp46_header_t *h = va_arg (*args, icmp46_header_t *);
+ icmp6_main_t *cm = &icmp6_main;
+ u32 i;
+
+ if (unformat_user (input, unformat_vlib_number_by_name,
+ cm->type_and_code_by_name, &i))
+ {
+ h->type = (i >> 8) & 0xff;
+ h->code = (i >> 0) & 0xff;
+ }
+ else if (unformat_user (input, unformat_vlib_number_by_name,
+ cm->type_by_name, &i))
+ {
+ h->type = i;
+ h->code = 0;
+ }
+ else
+ return 0;
+
+ return 1;
+}
+
+static void
+icmp6_pg_edit_function (pg_main_t * pg,
+ pg_stream_t * s,
+ pg_edit_group_t * g, u32 * packets, u32 n_packets)
+{
+ vlib_main_t *vm = vlib_get_main ();
+ u32 ip_offset, icmp_offset;
+ int bogus_length;
+
+ icmp_offset = g->start_byte_offset;
+ ip_offset = (g - 1)->start_byte_offset;
+
+ while (n_packets >= 1)
+ {
+ vlib_buffer_t *p0;
+ ip6_header_t *ip0;
+ icmp46_header_t *icmp0;
+
+ p0 = vlib_get_buffer (vm, packets[0]);
+ n_packets -= 1;
+ packets += 1;
+
+ ASSERT (p0->current_data == 0);
+ ip0 = (void *) (p0->data + ip_offset);
+ icmp0 = (void *) (p0->data + icmp_offset);
+
+ icmp0->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
+ &bogus_length);
+ ASSERT (bogus_length == 0);
+ }
+}
+
+typedef struct
+{
+ pg_edit_t type, code;
+ pg_edit_t checksum;
+} pg_icmp46_header_t;
+
+always_inline void
+pg_icmp_header_init (pg_icmp46_header_t * p)
+{
+ /* Initialize fields that are not bit fields in the IP header. */
+#define _(f) pg_edit_init (&p->f, icmp46_header_t, f);
+ _(type);
+ _(code);
+ _(checksum);
+#undef _
+}
+
+static uword
+unformat_pg_icmp_header (unformat_input_t * input, va_list * args)
+{
+ pg_stream_t *s = va_arg (*args, pg_stream_t *);
+ pg_icmp46_header_t *p;
+ u32 group_index;
+
+ p = pg_create_edit_group (s, sizeof (p[0]), sizeof (icmp46_header_t),
+ &group_index);
+ pg_icmp_header_init (p);
+
+ p->checksum.type = PG_EDIT_UNSPECIFIED;
+
+ {
+ icmp46_header_t tmp;
+
+ if (!unformat (input, "ICMP %U", unformat_icmp_type_and_code, &tmp))
+ goto error;
+
+ pg_edit_set_fixed (&p->type, tmp.type);
+ pg_edit_set_fixed (&p->code, tmp.code);
+ }
+
+ /* Parse options. */
+ while (1)
+ {
+ if (unformat (input, "checksum %U",
+ unformat_pg_edit, unformat_pg_number, &p->checksum))
+ ;
+
+ /* Can't parse input: try next protocol level. */
+ else
+ break;
+ }
+
+ if (!unformat_user (input, unformat_pg_payload, s))
+ goto error;
+
+ if (p->checksum.type == PG_EDIT_UNSPECIFIED)
+ {
+ pg_edit_group_t *g = pg_stream_get_group (s, group_index);
+ g->edit_function = icmp6_pg_edit_function;
+ g->edit_function_opaque = 0;
+ }
+
+ return 1;
+
+error:
+ /* Free up any edits we may have added. */
+ pg_free_edit_group (s);
+ return 0;
+}
+
+void
+icmp6_register_type (vlib_main_t * vm, icmp6_type_t type, u32 node_index)
+{
+ icmp6_main_t *im = &icmp6_main;
+
+ ASSERT ((int) type < ARRAY_LEN (im->input_next_index_by_type));
+ im->input_next_index_by_type[type]
+ = vlib_node_add_next (vm, ip6_icmp_input_node.index, node_index);
+}
+
+static clib_error_t *
+icmp6_init (vlib_main_t * vm)
+{
+ ip_main_t *im = &ip_main;
+ ip_protocol_info_t *pi;
+ icmp6_main_t *cm = &icmp6_main;
+ clib_error_t *error;
+
+ error = vlib_call_init_function (vm, ip_main_init);
+
+ if (error)
+ return error;
+
+ pi = ip_get_protocol_info (im, IP_PROTOCOL_ICMP6);
+ pi->format_header = format_icmp6_header;
+ pi->unformat_pg_edit = unformat_pg_icmp_header;
+
+ cm->type_by_name = hash_create_string (0, sizeof (uword));
+#define _(n,t) hash_set_mem (cm->type_by_name, #t, (n));
+ foreach_icmp6_type;
+#undef _
+
+ cm->type_and_code_by_name = hash_create_string (0, sizeof (uword));
+#define _(a,n,t) hash_set_mem (cm->type_by_name, #t, (n) | (ICMP6_##a << 8));
+ foreach_icmp6_code;
+#undef _
+
+ memset (cm->input_next_index_by_type,
+ ICMP_INPUT_NEXT_DROP, sizeof (cm->input_next_index_by_type));
+ memset (cm->max_valid_code_by_type, 0, sizeof (cm->max_valid_code_by_type));
+
+#define _(a,n,t) cm->max_valid_code_by_type[ICMP6_##a] = clib_max (cm->max_valid_code_by_type[ICMP6_##a], n);
+ foreach_icmp6_code;
+#undef _
+
+ memset (cm->min_valid_hop_limit_by_type, 0,
+ sizeof (cm->min_valid_hop_limit_by_type));
+ cm->min_valid_hop_limit_by_type[ICMP6_router_solicitation] = 255;
+ cm->min_valid_hop_limit_by_type[ICMP6_router_advertisement] = 255;
+ cm->min_valid_hop_limit_by_type[ICMP6_neighbor_solicitation] = 255;
+ cm->min_valid_hop_limit_by_type[ICMP6_neighbor_advertisement] = 255;
+ cm->min_valid_hop_limit_by_type[ICMP6_redirect] = 255;
+
+ memset (cm->min_valid_length_by_type, sizeof (icmp46_header_t),
+ sizeof (cm->min_valid_length_by_type));
+ cm->min_valid_length_by_type[ICMP6_router_solicitation] =
+ sizeof (icmp6_neighbor_discovery_header_t);
+ cm->min_valid_length_by_type[ICMP6_router_advertisement] =
+ sizeof (icmp6_router_advertisement_header_t);
+ cm->min_valid_length_by_type[ICMP6_neighbor_solicitation] =
+ sizeof (icmp6_neighbor_solicitation_or_advertisement_header_t);
+ cm->min_valid_length_by_type[ICMP6_neighbor_advertisement] =
+ sizeof (icmp6_neighbor_solicitation_or_advertisement_header_t);
+ cm->min_valid_length_by_type[ICMP6_redirect] =
+ sizeof (icmp6_redirect_header_t);
+
+ icmp6_register_type (vm, ICMP6_echo_request,
+ ip6_icmp_echo_request_node.index);
+
+ return vlib_call_init_function (vm, ip6_neighbor_init);
+}
+
+VLIB_INIT_FUNCTION (icmp6_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */