#include <vnet/ip/ip.h>
#include <vnet/pg/pg.h>
+
+static char * icmp_error_strings[] = {
+#define _(f,s) s,
+ foreach_icmp4_error
+#undef _
+};
+
static u8 * format_ip4_icmp_type_and_code (u8 * s, va_list * args)
{
icmp4_type_t type = va_arg (*args, int);
return s;
}
-typedef struct {
- u8 packet_data[64];
-} icmp_input_trace_t;
-
static u8 * format_icmp_input_trace (u8 * s, va_list * va)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
return s;
}
-typedef enum {
- ICMP4_ERROR_UNKNOWN_TYPE,
- ICMP4_ERROR_ECHO_REPLIES_SENT,
- ICMP4_ERROR_TTL_EXPIRE_RESP_SENT,
- ICMP4_ERROR_TTL_EXPIRE_RESP_DROP,
-} icmp_error_t;
-
-static char * icmp_error_strings[] = {
- [ICMP4_ERROR_UNKNOWN_TYPE] = "unknown type",
- [ICMP4_ERROR_ECHO_REPLIES_SENT] = "echo replies sent",
- [ICMP4_ERROR_TTL_EXPIRE_RESP_SENT] = "TTL time exceeded response sent",
- [ICMP4_ERROR_TTL_EXPIRE_RESP_DROP] = "TTL time exceeded response dropped",
-};
-
typedef enum {
ICMP_INPUT_NEXT_ERROR,
ICMP_INPUT_N_NEXT,
};
typedef enum {
- ICMP4_TTL_EXPIRE_NEXT_DROP,
- ICMP4_TTL_EXPIRE_NEXT_LOOKUP,
- ICMP4_TTL_EXPIRE_N_NEXT,
-} icmp_ttl_expire_next_t;
+ IP4_ICMP_ERROR_NEXT_DROP,
+ IP4_ICMP_ERROR_NEXT_LOOKUP,
+ IP4_ICMP_ERROR_N_NEXT,
+} ip4_icmp_error_next_t;
+
+void
+icmp4_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
+icmp4_icmp_type_to_error (u8 type)
+{
+ switch (type) {
+ case ICMP4_destination_unreachable:
+ return ICMP4_ERROR_DEST_UNREACH_SENT;
+ case ICMP4_time_exceeded:
+ return ICMP4_ERROR_TTL_EXPIRE_SENT;
+ case ICMP4_parameter_problem:
+ return ICMP4_ERROR_PARAM_PROBLEM_SENT;
+ default:
+ return ICMP4_ERROR_DROP;
+ }
+}
static uword
-ip4_icmp_ttl_expire (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+ip4_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;
- icmp_ttl_expire_next_t next_index;
+ ip4_icmp_error_next_t next_index;
ip4_main_t *im = &ip4_main;
ip_lookup_main_t * lm = &im->lookup_main;
vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
/* stride */ 1, sizeof (icmp_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 = ICMP4_TTL_EXPIRE_NEXT_LOOKUP;
- u8 error0 = ICMP4_ERROR_TTL_EXPIRE_RESP_SENT;
- u32 len0, new_len0;
- vlib_buffer_t * p0;
- ip4_header_t * ip0, * out_ip0;
- icmp46_header_t * icmp0;
- ip_csum_t sum;
- u32 sw_if_index0, if_add_index0;
-
- /* 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);
- len0 = vlib_buffer_length_in_chain (vm, p0);
- sw_if_index0 = vnet_buffer(p0)->sw_if_index[VLIB_RX];
-
- /* Cut payload to just IP header plus first 8 bytes */
- new_len0 = (ip0->ip_version_and_header_length &0xf)*4 + 8;
- if (len0 > new_len0)
- {
- p0->current_length = new_len0; /* should fit in 1st buffer */
- 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;
- }
- }
- }
+ while (n_left_from > 0) {
+ vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next);
- /* Add IP header and ICMP header including a 4 byte unused field */
- vlib_buffer_advance(p0,
- -sizeof(ip4_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_and_header_length = 0x45;
- out_ip0->tos = 0;
- out_ip0->length = clib_host_to_net_u16(p0->current_length);
- out_ip0->fragment_id = 0;
- out_ip0->ttl = 0xff;
- out_ip0->protocol = IP_PROTOCOL_ICMP;
- 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);
- ip4_address_t *if_ip =
- ip_interface_address_get_address(lm, if_add);
- out_ip0->src_address = *if_ip;
- vlib_error_count (vm, node->node_index, error0, 1);
- }
- else /* interface has no IP4 address - should not happen */
- {
- next0 = ICMP4_TTL_EXPIRE_NEXT_DROP;
- error0 = ICMP4_ERROR_TTL_EXPIRE_RESP_DROP;
- }
- out_ip0->checksum = ip4_header_checksum(out_ip0);
-
- /* Fill icmp header fields */
- icmp0->type = ICMP4_time_exceeded;
- icmp0->code = ICMP4_time_exceeded_ttl_exceeded_in_transit;
- icmp0->checksum = 0;
- sum = ip_incremental_checksum(
- 0, icmp0, p0->current_length - sizeof(ip4_header_t));
- icmp0->checksum = ~ip_csum_fold(sum);
-
- /* Update error status */
- p0->error = node->errors[error0];
-
- /* 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);
+ while (n_left_from > 0 && n_left_to_next > 0) {
+ u32 pi0 = from[0];
+ u32 next0 = IP4_ICMP_ERROR_NEXT_LOOKUP;
+ u8 error0 = ICMP4_ERROR_NONE;
+ vlib_buffer_t * p0;
+ ip4_header_t * ip0, * out_ip0;
+ icmp46_header_t * icmp0;
+ u32 sw_if_index0, if_add_index0;
+ ip_csum_t sum;
+
+ /* 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];
+
+ /*
+ * RFC1812 says to keep as much of the original packet as
+ * possible within the minimum MTU (576). 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 > 576 ? 576 : p0->current_length;
+
+ /* Add IP header and ICMPv4 header including a 4 byte data field */
+ vlib_buffer_advance(p0,
+ -sizeof(ip4_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_and_header_length = 0x45;
+ out_ip0->tos = 0;
+ out_ip0->length = clib_host_to_net_u16(p0->current_length);
+ out_ip0->fragment_id = 0;
+ out_ip0->flags_and_fragment_offset = 0;
+ out_ip0->ttl = 0xff;
+ out_ip0->protocol = IP_PROTOCOL_ICMP;
+ 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);
+ ip4_address_t *if_ip =
+ ip_interface_address_get_address(lm, if_add);
+ out_ip0->src_address = *if_ip;
+ } else {
+ /* interface has no IP4 address - should not happen */
+ next0 = IP4_ICMP_ERROR_NEXT_DROP;
+ error0 = ICMP4_ERROR_DROP;
+ }
+ out_ip0->checksum = ip4_header_checksum(out_ip0);
+
+ /* 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;
+ sum = ip_incremental_checksum(0, icmp0, p0->current_length - sizeof(ip4_header_t));
+ icmp0->checksum = ~ip_csum_fold(sum);
+
+ /* Update error status */
+ if (error0 == ICMP4_ERROR_NONE)
+ error0 = icmp4_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;
}
-VLIB_REGISTER_NODE (ip4_icmp_ttl_expire_node) = {
- .function = ip4_icmp_ttl_expire,
- .name = "ip4-icmp-ttl-expire",
+VLIB_REGISTER_NODE (ip4_icmp_error_node) = {
+ .function = ip4_icmp_error,
+ .name = "ip4-icmp-error",
.vector_size = sizeof (u32),
.n_errors = ARRAY_LEN (icmp_error_strings),
.error_strings = icmp_error_strings,
- .n_next_nodes = ICMP4_TTL_EXPIRE_N_NEXT,
+ .n_next_nodes = IP4_ICMP_ERROR_N_NEXT,
.next_nodes = {
- [ICMP4_TTL_EXPIRE_NEXT_DROP] = "error-drop",
- [ICMP4_TTL_EXPIRE_NEXT_LOOKUP] = "ip4-lookup",
+ [IP4_ICMP_ERROR_NEXT_DROP] = "error-drop",
+ [IP4_ICMP_ERROR_NEXT_LOOKUP] = "ip4-lookup",
},
.format_trace = format_icmp_input_trace,
--- /dev/null
+/*
+ * 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.
+ */
+#ifndef included_vnet_icmp4_h
+#define included_vnet_icmp4_h
+
+#define foreach_icmp4_error \
+ _ (NONE, "valid packets") \
+ _ (UNKNOWN_TYPE, "unknown type") \
+ _ (INVALID_CODE_FOR_TYPE, "invalid code for type") \
+ _ (INVALID_HOP_LIMIT_FOR_TYPE, "hop_limit != 255") \
+ _ (LENGTH_TOO_SMALL_FOR_TYPE, "payload length too small for type") \
+ _ (OPTIONS_WITH_ODD_LENGTH, \
+ "total option length not multiple of 8 bytes") \
+ _ (OPTION_WITH_ZERO_LENGTH, "option has zero length") \
+ _ (ECHO_REPLIES_SENT, "echo replies sent") \
+ _ (DST_LOOKUP_MISS, "icmp6 dst address lookup misses") \
+ _ (DEST_UNREACH_SENT, "destination unreachable response sent") \
+ _ (TTL_EXPIRE_SENT, "hop limit exceeded response sent") \
+ _ (PARAM_PROBLEM_SENT, "parameter Pproblem response sent") \
+ _ (DROP, "error message dropped")
+
+typedef enum {
+#define _(f,s) ICMP4_ERROR_##f,
+ foreach_icmp4_error
+#undef _
+} icmp4_error_t;
+
+typedef struct {
+ u8 packet_data[64];
+} icmp_input_trace_t;
+
+format_function_t format_icmp4_input_trace;
+void ip4_icmp_register_type (vlib_main_t * vm, icmp4_type_t type, u32 node_index);
+void icmp4_error_set_vnet_buffer (vlib_buffer_t *b, u8 type, u8 code, u32 data);
+
+#endif /* included_vnet_icmp4_h */
IP4_INPUT_NEXT_PUNT,
IP4_INPUT_NEXT_LOOKUP,
IP4_INPUT_NEXT_LOOKUP_MULTICAST,
- IP4_INPUT_NEXT_TTL_EXPIRE,
+ IP4_INPUT_NEXT_ICMP_ERROR,
IP4_INPUT_N_NEXT,
} ip4_input_next_t;
if (PREDICT_FALSE(error0 != IP4_ERROR_NONE))
{
- next0 = (error0 != IP4_ERROR_OPTIONS
- ? (error0 == IP4_ERROR_TIME_EXPIRED
- ? IP4_INPUT_NEXT_TTL_EXPIRE
- : IP4_INPUT_NEXT_DROP)
- : IP4_INPUT_NEXT_PUNT);
+ if (error0 == IP4_ERROR_TIME_EXPIRED) {
+ icmp4_error_set_vnet_buffer(p0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit, 0);
+ next0 = IP4_INPUT_NEXT_ICMP_ERROR;
+ } else
+ next0 = error0 != IP4_ERROR_OPTIONS ? IP4_INPUT_NEXT_DROP : IP4_INPUT_NEXT_PUNT;
}
if (PREDICT_FALSE(error1 != IP4_ERROR_NONE))
{
- next1 = (error1 != IP4_ERROR_OPTIONS
- ? (error1 == IP4_ERROR_TIME_EXPIRED
- ? IP4_INPUT_NEXT_TTL_EXPIRE
- : IP4_INPUT_NEXT_DROP)
- : IP4_INPUT_NEXT_PUNT);
+ if (error1 == IP4_ERROR_TIME_EXPIRED) {
+ icmp4_error_set_vnet_buffer(p1, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit, 0);
+ next1 = IP4_INPUT_NEXT_ICMP_ERROR;
+ } else
+ next1 = error1 != IP4_ERROR_OPTIONS ? IP4_INPUT_NEXT_DROP : IP4_INPUT_NEXT_PUNT;
}
vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
p0->error = error_node->errors[error0];
if (PREDICT_FALSE(error0 != IP4_ERROR_NONE))
{
- next0 = (error0 != IP4_ERROR_OPTIONS
- ? (error0 == IP4_ERROR_TIME_EXPIRED
- ? IP4_INPUT_NEXT_TTL_EXPIRE
- : IP4_INPUT_NEXT_DROP)
- : IP4_INPUT_NEXT_PUNT);
+ if (error0 == IP4_ERROR_TIME_EXPIRED) {
+ icmp4_error_set_vnet_buffer(p0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit, 0);
+ next0 = IP4_INPUT_NEXT_ICMP_ERROR;
+ } else
+ next0 = error0 != IP4_ERROR_OPTIONS ? IP4_INPUT_NEXT_DROP : IP4_INPUT_NEXT_PUNT;
}
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
[IP4_INPUT_NEXT_PUNT] = "error-punt",
[IP4_INPUT_NEXT_LOOKUP] = "ip4-lookup",
[IP4_INPUT_NEXT_LOOKUP_MULTICAST] = "ip4-lookup-multicast",
- [IP4_INPUT_NEXT_TTL_EXPIRE] = "ip4-icmp-ttl-expire",
+ [IP4_INPUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
},
.format_buffer = format_ip4_header,
[IP4_INPUT_NEXT_PUNT] = "error-punt",
[IP4_INPUT_NEXT_LOOKUP] = "ip4-lookup",
[IP4_INPUT_NEXT_LOOKUP_MULTICAST] = "ip4-lookup-multicast",
- [IP4_INPUT_NEXT_TTL_EXPIRE] = "ip4-icmp-ttl-expire",
+ [IP4_INPUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
},
.format_buffer = format_ip4_header,
Code Review / vpp.git / commitdiff