/*
* Copyright (c) 2018 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.
*/
#include <stdbool.h>
#include <vlib/vlib.h>
#include <vnet/crypto/crypto.h>
vnet_crypto_main_t crypto_main;
static_always_inline void
crypto_set_op_status (vnet_crypto_op_t * ops[], u32 n_ops, int status)
{
while (n_ops--)
{
ops[0]->status = status;
ops++;
}
}
static_always_inline u32
vnet_crypto_process_ops_call_handler (vlib_main_t * vm,
vnet_crypto_main_t * cm,
vnet_crypto_op_id_t opt,
vnet_crypto_op_t * ops[],
vnet_crypto_op_chunk_t * chunks,
u32 n_ops)
{
u32 rv = 0;
if (n_ops == 0)
return 0;
if (chunks)
{
if (cm->chained_ops_handlers[opt] == 0)
crypto_set_op_status (ops, n_ops,
VNET_CRYPTO_OP_STATUS_FAIL_NO_HANDLER);
else
rv = (cm->chained_ops_handlers[opt]) (vm, ops, chunks, n_ops);
}
else
{
if (cm->ops_handlers[opt] == 0)
crypto_set_op_status (ops, n_ops,
VNET_CRYPTO_OP_STATUS_FAIL_NO_HANDLER);
else
rv = (cm->ops_handlers[opt]) (vm, ops, n_ops);
}
return rv;
}
static_always_inline u32
vnet_crypto_process_ops_inline (vlib_main_t * vm, vnet_crypto_op_t ops[],
vnet_crypto_op_chunk_t * chunks, u32 n_ops)
{
vnet_crypto_main_t *cm = &crypto_main;
const int op_q_size = VLIB_FRAME_SIZE;
vnet_crypto_op_t *op_queue[op_q_size];
vnet_crypto_op_id_t opt, current_op_type = ~0;
u32 n_op_queue = 0;
u32 rv = 0, i;
ASSERT (n_ops >= 1);
for (i
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/*
* Copyright (c) 2016 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.
*/
#include <stddef.h>
#include <vnet/ip/ping.h>
#include <vnet/fib/ip6_fib.h>
#include <vnet/fib/ip4_fib.h>
#include <vnet/fib/fib_entry.h>
#include <vlib/vlib.h>
ping_main_t ping_main;
/**
* @file
* @brief IPv4 and IPv6 ICMP Ping.
*
* This file contains code to support IPv4 or IPv6 ICMP ECHO_REQUEST to
* network hosts.
*
*/
typedef struct
{
u16 id;
u16 seq;
u32 cli_process_node;
u8 is_ip6;
} icmp_echo_trace_t;
u8 *
format_icmp_echo_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 *);
icmp_echo_trace_t *t = va_arg (*va, icmp_echo_trace_t *);
s =
format (s, "ICMP%s echo id %d seq %d", t->is_ip6 ? "6" : "4", t->id,
t->seq);
if (t->cli_process_node == PING_CLI_UNKNOWN_NODE)
{
s = format (s, " (unknown)");
}
else
{
s = format (s, " send to cli node %d", t->cli_process_node);
}
return s;
}
static u8 *
format_ip46_ping_result (u8 * s, va_list * args)
{
send_ip46_ping_result_t res = va_arg (*args, send_ip46_ping_result_t);
switch (res)
{
#define _(v, n) case SEND_PING_##v: s = format(s, "%s", n);break;
foreach_ip46_ping_result
#undef _
}
return (s);
}
/*
* Poor man's get-set-clear functions
* for manipulation of icmp_id -> cli_process_id
* mappings.
*
* There should normally be very few (0..1..2) of these
* mappings, so the linear search is a good strategy.
*
* Make them thread-safe via a simple spinlock.
*
*/
static_always_inline uword
get_cli_process_id_by_icmp_id_mt (vlib_main_t * vm, u16 icmp_id)
{
ping_main_t *pm = &ping_main;
uword cli_process_id = PING_CLI_UNKNOWN_NODE;
ping_run_t *pr;
clib_spinlock_lock_if_init (&pm->ping_run_check_lock);
vec_foreach (pr, pm->active_ping_runs)
{
if (pr->icmp_id == icmp_id)
{
cli_process_id = pr->cli_process_id;
break;
}
}
clib_spinlock_unlock_if_init (&pm->ping_run_check_lock);
return cli_process_id;
}
static_always_inline void
set_cli_process_id_by_icmp_id_mt (vlib_main_t * vm, u16 icmp_id,
uword cli_process_id)
{
ping_main_t *pm = &ping_main;
ping_run_t *pr;
clib_spinlock_lock_if_init (&pm->ping_run_check_lock);
vec_foreach (pr, pm->active_ping_runs)
{
if (pr->icmp_id == icmp_id)
{
pr->cli_process_id = cli_process_id;
goto have_found_and_set;
}
}
/* no such key yet - add a new one */
ping_run_t new_pr = {.icmp_id = icmp_id,.cli_process_id = cli_process_id };
vec_add1 (pm->active_ping_runs, new_pr);
have_found_and_set:
clib_spinlock_unlock_if_init (&pm->ping_run_check_lock);
}
static_always_inline void
clear_cli_process_id_by_icmp_id_mt (vlib_main_t * vm, u16 icmp_id)
{
ping_main_t *pm = &ping_main;
ping_run_t *pr;
clib_spinlock_lock_if_init (&pm->ping_run_check_lock);
vec_foreach (pr, pm->active_ping_runs)
{
if (pr->icmp_id == icmp_id)
{
vec_del1 (pm->active_ping_runs, pm->active_ping_runs - pr);
break;
}
}
clib_spinlock_unlock_if_init (&pm->ping_run_check_lock);
}
static_always_inline int
ip46_get_icmp_id_and_seq (vlib_main_t * vm, vlib_buffer_t * b0,
u16 * out_icmp_id, u16 * out_icmp_seq, int is_ip6)
{
int l4_offset;
if (is_ip6)
{
ip6_header_t *ip6 = vlib_buffer_get_current (b0);
if (ip6->protocol != IP_PROTOCOL_ICMP6)
{
return 0;
}
l4_offset = sizeof (*ip6); // IPv6 EH
}
else
{
ip4_header_t *ip4 = vlib_buffer_get_current (b0);
l4_offset = ip4_header_bytes (ip4);
}
icmp46_header_t *icmp46 = vlib_buffer_get_current (b0) + l4_offset;
icmp46_echo_request_t *icmp46_echo = (icmp46_echo_request_t *) (icmp46 + 1);
*out_icmp_id = clib_net_to_host_u16 (icmp46_echo->id);
*out_icmp_seq = clib_net_to_host_u16 (icmp46_echo->seq);
return 1;
}
/*
* post the buffer to a given cli process node - the caller should forget bi0 after return.
*/
static_always_inline void
ip46_post_icmp_reply_event (vlib_main_t * vm, uword cli_process_id, u32 bi0,
int is_ip6)
{
vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
u64 nowts = clib_cpu_time_now ();
/* Pass the timestamp to the cli_process thanks to the vnet_buffer unused metadata field */
/* Camping on unused data... just ensure statically that there is enough space */
STATIC_ASSERT (ARRAY_LEN (vnet_buffer (b0)->unused) *
sizeof (vnet_buffer (b0)->unused[0]) > sizeof (nowts),
"ping reply timestamp fits within remaining space of vnet_buffer unused data");
u64 *pnowts = (void *) &vnet_buffer (b0)->unused[0];
*pnowts = nowts;
u32 event_id = is_ip6 ? PING_RESPONSE_IP6 : PING_RESPONSE_IP4;
vlib_process_signal_event_mt (vm, cli_process_id, event_id, bi0);
}
static_always_inline void
ip46_echo_reply_maybe_trace_buffer (vlib_main_t * vm,
vlib_node_runtime_t * node,
uword cli_process_id, u16 id, u16 seq,
vlib_buffer_t * b0, int is_ip6)
{
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
icmp_echo_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
tr->id = id;
tr->seq = seq;
tr->cli_process_node = cli_process_id;
tr->is_ip6 = is_ip6;
}
}
static_always_inline uword
ip46_icmp_echo_reply_inner_node_fn (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame, int do_trace,
int is_ip6)
{
u32 n_left_from, *from, *to_next;
icmp46_echo_reply_next_t next_index;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
while (n_left_from > 0)
{
u32 n_left_to_next;
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 bi0;
vlib_buffer_t *b0;
/*
* The buffers (replies) are either posted to the CLI thread
* awaiting for them for subsequent analysis and disposal,
* or are sent to the punt node.
*
* So the only "next" node is a punt, normally.
*/
u32 next0 = ICMP46_ECHO_REPLY_NEXT_PUNT;
bi0 = from[0];
b0 = vlib_get_buffer (vm, bi0);
from += 1;
n_left_from -= 1;
u16 icmp_id = ~0;
u16 icmp_seq = ~0;
uword cli_process_id = PING_CLI_UNKNOWN_NODE;
if (ip46_get_icmp_id_and_seq (vm, b0, &icmp_id, &icmp_seq, is_ip6))
{
cli_process_id = get_cli_process_id_by_icmp_id_mt (vm, icmp_id);
}
if (do_trace)
ip46_echo_reply_maybe_trace_buffer (vm, node, cli_process_id,
icmp_id, icmp_seq, b0,
is_ip6);
if (~0 == cli_process_id)
{
/* no outstanding requests for this reply, punt */
/* speculatively enqueue b0 to the current next frame */
to_next[0] = bi0;
to_next += 1;
n_left_to_next -= 1;
/* 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);
}
else
{
/* Post the buffer to CLI thread. It will take care of freeing it. */
ip46_post_icmp_reply_event (vm, cli_process_id, bi0, is_ip6);
}
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
return frame->n_vectors;
}
/*
* select "with-trace" or "without-trace" codepaths upfront.
*/
static_always_inline uword
ip46_icmp_echo_reply_outer_node_fn (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame, int is_ip6)
{
if (node->flags & VLIB_NODE_FLAG_TRACE)
return ip46_icmp_echo_reply_inner_node_fn (vm, node, frame,
1 /* do_trace */ , is_ip6);
else
return ip46_icmp_echo_reply_inner_node_fn (vm, node, frame,
0 /* do_trace */ , is_ip6);
}
static uword
ip4_icmp_echo_reply_node_fn (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
return ip46_icmp_echo_reply_outer_node_fn (vm, node, frame,
0 /* is_ip6 */ );
}
static uword
ip6_icmp_echo_reply_node_fn (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
return ip46_icmp_echo_reply_outer_node_fn (vm, node, frame,
1 /* is_ip6 */ );
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_icmp_echo_reply_node, static) =
{
.function = ip6_icmp_echo_reply_node_fn,
.name = "ip6-icmp-echo-reply",
.vector_size = sizeof (u32),
.format_trace = format_icmp_echo_trace,
.n_next_nodes = ICMP46_ECHO_REPLY_N_NEXT,
.next_nodes = {
[ICMP46_ECHO_REPLY_NEXT_DROP] = "ip6-drop",
[ICMP46_ECHO_REPLY_NEXT_PUNT] = "ip6-punt",
},
};
VLIB_REGISTER_NODE (ip4_icmp_echo_reply_node, static) =
{
.function = ip4_icmp_echo_reply_node_fn,
.name = "ip4-icmp-echo-reply",
.vector_size = sizeof (u32),
.format_trace = format_icmp_echo_trace,
.n_next_nodes = ICMP46_ECHO_REPLY_N_NEXT,
.next_nodes = {
[ICMP46_ECHO_REPLY_NEXT_DROP] = "ip4-drop",
[ICMP46_ECHO_REPLY_NEXT_PUNT] = "ip4-punt",
},
};
/* *INDENT-ON* */
/*
* A swarm of address-family agnostic helper functions
* for building and sending the ICMP echo request.
*
* Deliberately mostly "static" rather than "static inline"
* so one can trace them sanely if needed in debugger, if needed.
*
*/
static_always_inline u8
get_icmp_echo_payload_byte (int offset)
{
return (offset % 256);
}
/* Fill in the ICMP ECHO structure, return the safety-checked and possibly shrunk data_len */
static u16
init_icmp46_echo_request (vlib_main_t * vm, vlib_buffer_t * b0,
int l4_header_offset,
icmp46_echo_request_t * icmp46_echo, u16 seq_host,
u16 id_host, u64 now, u16 data_len)
{
int i;
int l34_len =
l4_header_offset + sizeof (icmp46_header_t) +
offsetof (icmp46_echo_request_t, data);
int max_data_len = vlib_buffer_get_default_data_size (vm) - l34_len;
int first_buf_data_len = data_len < max_data_len ? data_len : max_data_len;
int payload_offset = 0;
for (i = 0; i < first_buf_data_len; i++)
icmp46_echo->data[i] = get_icmp_echo_payload_byte (payload_offset++);
/* inspired by vlib_buffer_add_data */
vlib_buffer_t *hb = b0;
int remaining_data_len = data_len - first_buf_data_len;
while (remaining_data_len)
{
int this_buf_data_len =
remaining_data_len <
vlib_buffer_get_default_data_size (vm) ? remaining_data_len :
vlib_buffer_get_default_data_size (vm);
int n_alloc = vlib_buffer_alloc (vm, &b0->next_buffer, 1);
if (n_alloc < 1)
{
/* That is how much we have so far - return it... */
return (data_len - remaining_data_len);
}
b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
/* move on to the newly acquired buffer */
b0 = vlib_get_buffer (vm, b0->next_buffer);
/* initialize the data */
for (i = 0; i < this_buf_data_len; i++)
{
b0->data[i] = get_icmp_echo_payload_byte (payload_offset++);
}
b0->current_length = this_buf_data_len;
b0->current_data = 0;
remaining_data_len -= this_buf_data_len;
}
hb->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
hb->current_length = l34_len + first_buf_data_len;
hb->total_length_not_including_first_buffer = data_len - first_buf_data_len;
icmp46_echo->time_sent = now;
icmp46_echo->seq = clib_host_to_net_u16 (seq_host);
icmp46_echo->id = clib_host_to_net_u16 (id_host);
return data_len;
}
static u32
ip46_fib_index_from_table_id (u32 table_id, int is_ip6)
{
u32 fib_index = is_ip6 ?
ip6_fib_index_from_table_id (table_id) :
ip4_fib_index_from_table_id (table_id);
return fib_index;
}
static fib_node_index_t
ip46_fib_table_lookup_host (u32 fib_index, ip46_address_t * pa46, int is_ip6)
{
fib_node_index_t fib_entry_index = is_ip6 ?
ip6_fib_table_lookup (fib_index, &pa46->ip6, 128) :
ip4_fib_table_lookup (ip4_fib_get (fib_index), &pa46->ip4, 32);
return fib_entry_index;
}
static u32
ip46_get_resolving_interface (u32 fib_index, ip46_address_t * pa46,
int is_ip6)
{
u32 sw_if_index = ~0;
if (~0 != fib_index)
{
fib_node_index_t fib_entry_index;
fib_entry_index = ip46_fib_table_lookup_host (fib_index, pa46, is_ip6);
sw_if_index = fib_entry_get_resolving_interface (fib_entry_index);
}
return sw_if_index;
}
static u32
ip46_fib_table_get_index_for_sw_if_index (u32 sw_if_index, int is_ip6)
{
u32 fib_table_index = is_ip6 ?
ip6_fib_table_get_index_for_sw_if_index (sw_if_index) :
ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
return fib_table_index;
}
static int
ip46_fill_l3_header (ip46_address_t * pa46, vlib_buffer_t * b0, int is_ip6)
{
if (is_ip6)
{
ip6_header_t *ip6 = vlib_buffer_get_current (b0);
/* Fill in ip6 header fields */
ip6->ip_version_traffic_class_and_flow_label =
clib_host_to_net_u32 (0x6 << 28);
ip6->payload_length = 0; /* will be set later */
ip6->protocol = IP_PROTOCOL_ICMP6;
ip6->hop_limit = 255;
ip6->dst_address = pa46->ip6;
ip6->src_address = pa46->ip6;
return (sizeof (ip6_header_t));
}
else
{
ip4_header_t *ip4 = vlib_buffer_get_current (b0);
/* Fill in ip4 header fields */
ip4->checksum = 0;
ip4->ip_version_and_header_length = 0x45;
ip4->tos = 0;
ip4->length = 0; /* will be set later */
ip4->fragment_id = 0;
ip4->flags_and_fragment_offset = 0;
ip4->ttl = 0xff;
ip4->protocol = IP_PROTOCOL_ICMP;
ip4->src_address = pa46->ip4;
ip4->dst_address = pa46->ip4;
return (sizeof (ip4_header_t));
}
}
static int
ip46_set_src_address (u32 sw_if_index, vlib_buffer_t * b0, int is_ip6)
{
int res;
if (is_ip6)
{
ip6_main_t *im = &ip6_main;
ip6_header_t *ip6 = vlib_buffer_get_current (b0);
res =
ip6_src_address_for_packet (&im->lookup_main, sw_if_index,
&ip6->dst_address, &ip6->src_address);
}
else
{
ip4_main_t *im = &ip4_main;
ip4_header_t *ip4 = vlib_buffer_get_current (b0);
res =
ip4_src_address_for_packet (&im->lookup_main, sw_if_index,
&ip4->src_address);
/* IP4 and IP6 paths have the inverse logic. Harmonize. */
res = !res;
}
return res;
}
static void
ip46_print_buffer_src_address (vlib_main_t * vm, vlib_buffer_t * b0,
int is_ip6)
{
void *format_addr_func;
void *paddr;
if (is_ip6)
{
ip6_header_t *ip6 = vlib_buffer_get_current (b0);
format_addr_func = format_ip6_address;
paddr = &ip6->src_address;
}
else
{
ip4_header_t *ip4 = vlib_buffer_get_current (b0);
format_addr_func = format_ip4_address;
paddr = &ip4->src_address;
}
vlib_cli_output (vm, "Source address: %U ", format_addr_func, paddr);
}
static u16
ip46_fill_icmp_request_at (vlib_main_t * vm, int l4_offset, u16 seq_host,
u16 id_host, u16 data_len, vlib_buffer_t * b0,
int is_ip6)
{
icmp46_header_t *icmp46 = vlib_buffer_get_current (b0) + l4_offset;
icmp46->type = is_ip6 ? ICMP6_echo_request : ICMP4_echo_request;
icmp46->code = 0;
icmp46->checksum = 0;
icmp46_echo_request_t *icmp46_echo = (icmp46_echo_request_t *) (icmp46 + 1);
data_len =
init_icmp46_echo_request (vm, b0, l4_offset, icmp46_echo, seq_host,
id_host, clib_cpu_time_now (), data_len);
return data_len;
}
/* Compute ICMP4 checksum with multibuffer support. */
u16
ip4_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
ip4_header_t * ip0)
{
ip_csum_t sum0;
u32 ip_header_length, payload_length_host_byte_order;
u32 n_this_buffer, n_bytes_left, n_ip_bytes_this_buffer;
u16 sum16;
void *data_this_buffer;
ip_header_length = ip4_header_bytes (ip0);
payload_length_host_byte_order =
clib_net_to_host_u16 (ip0->length) - ip_header_length;
/* ICMP4 checksum does not include the IP header */
sum0 = 0;
n_bytes_left = n_this_buffer = payload_length_host_byte_order;
data_this_buffer = (void *) ip0 + ip_header_length;
n_ip_bytes_this_buffer =
p0->current_length - (((u8 *) ip0 - p0->data) - p0->current_data);
if (n_this_buffer + ip_header_length > n_ip_bytes_this_buffer)
{
n_this_buffer = n_ip_bytes_this_buffer > ip_header_length ?
n_ip_bytes_this_buffer - ip_header_length : 0;
}
while (1)
{
sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
n_bytes_left -= n_this_buffer;
if (n_bytes_left == 0)
break;
ASSERT (p0->flags & VLIB_BUFFER_NEXT_PRESENT);
p0 = vlib_get_buffer (vm, p0->next_buffer);
data_this_buffer = vlib_buffer_get_current (p0);
n_this_buffer = p0->current_length;
}
sum16 = ~ip_csum_fold (sum0);
return sum16;
}
static void
ip46_fix_len_and_csum (vlib_main_t * vm, int l4_offset, u16 data_len,
vlib_buffer_t * b0, int is_ip6)
{
u16 payload_length =
data_len + sizeof (icmp46_header_t) + offsetof (icmp46_echo_request_t,
data);
u16 total_length = payload_length + l4_offset;
icmp46_header_t *icmp46 = vlib_buffer_get_current (b0) + l4_offset;
icmp46->checksum = 0;
if (is_ip6)
{
ip6_header_t *ip6 = vlib_buffer_get_current (b0);
ip6->payload_length = clib_host_to_net_u16 (payload_length);
int bogus_length = 0;
icmp46->checksum =
ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip6, &bogus_length);
}
else
{
ip4_header_t *ip4 = vlib_buffer_get_current (b0);
ip4->length = clib_host_to_net_u16 (total_length);
ip4->checksum = ip4_header_checksum (ip4);
icmp46->checksum = ip4_icmp_compute_checksum (vm, b0, ip4);
}
}
static u16
at_most_a_frame (u32 count)
{
return count > VLIB_FRAME_SIZE ? VLIB_FRAME_SIZE : count;
}
static int
ip46_enqueue_packet (vlib_main_t * vm, vlib_buffer_t * b0, u32 burst,
int is_ip6)
{
vlib_frame_t *f = 0;
u32 lookup_node_index =
is_ip6 ? ip6_lookup_node.index : ip4_lookup_node.index;
int n_sent = 0;
u16 n_to_send;
/*
* Enqueue the packet, possibly as one or more frames of copies to make
* bursts. We enqueue b0 as the very last buffer, when there is no possibility
* for error in vlib_buffer_copy, so as to allow the caller to free it
* in case we encounter the error in the middle of the loop.
*/
for (n_to_send = at_most_a_frame (burst), burst -= n_to_send; n_to_send > 0;
n_to_send = at_most_a_frame (burst), burst -= n_to_send)
{
f = vlib_get_frame_to_node (vm, lookup_node_index);
/* f can not be NULL here - frame allocation failure causes panic */
u32 *to_next = vlib_frame_vector_args (f);
f->n_vectors = n_to_send;
while (n_to_send > 1)
{
vlib_buffer_t *b0copy = vlib_buffer_copy (vm, b0);
if (PREDICT_FALSE (b0copy == NULL))
goto ship_and_ret;
*to_next++ = vlib_get_buffer_index (vm, b0copy);
n_to_send--;
n_sent++;
}
/* n_to_send is guaranteed to equal 1 here */
if (burst > 0)
{
/* not the last burst, so still make a copy for the last buffer */
vlib_buffer_t *b0copy = vlib_buffer_copy (vm, b0);
if (PREDICT_FALSE (b0copy == NULL))
goto ship_and_ret;
n_to_send--;
*to_next++ = vlib_get_buffer_index (vm, b0copy);
}
else
{
/* put the original buffer as the last one of an error-free run */
*to_next++ = vlib_get_buffer_index (vm, b0);
}
vlib_put_frame_to_node (vm, lookup_node_index, f);
n_sent += f->n_vectors;
}
return n_sent;
/*
* We reach here in case we already enqueued one or more buffers
* and maybe one or more frames but could not make more copies.
* There is an outstanding frame - so ship it and return.
* Caller will have to free the b0 in this case, since
* we did not enqueue it here yet.
*/
ship_and_ret:
n_sent += f->n_vectors;
vlib_put_frame_to_node (vm, lookup_node_index, f);
return n_sent;
}
/*
* An address-family agnostic ping send function.
*/
#define ERROR_OUT(e) do { err = e; goto done; } while (0)
static send_ip46_ping_result_t
send_ip46_ping (vlib_main_t * vm,
u32 table_id,
ip46_address_t * pa46,
u32 sw_if_index,
u16 seq_host, u16 id_host, u16 data_len, u32 burst,
u8 verbose, int is_ip6)
{
int err = SEND_PING_OK;
u32 bi0 = 0;
int n_buf0 = 0;
vlib_buffer_t *b0;
n_buf0 = vlib_buffer_alloc (vm, &bi0, 1);
if (n_buf0 < 1)
ERROR_OUT (SEND_PING_ALLOC_FAIL);
b0 = vlib_get_buffer (vm, bi0);
VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
/*
* if the user did not provide a source interface,
* perform a resolution and use an interface
* via which it succeeds.
*/
u32 fib_index;
if (~0 == sw_if_index)
{
fib_index = ip46_fib_index_from_table_id (table_id, is_ip6);
sw_if_index = ip46_get_resolving_interface (fib_index, pa46, is_ip6);
}
else
fib_index =
ip46_fib_table_get_index_for_sw_if_index (sw_if_index, is_ip6);
if (~0 == fib_index)
ERROR_OUT (SEND_PING_NO_TABLE);
if (~0 == sw_if_index)
ERROR_OUT (SEND_PING_NO_INTERFACE);
vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
vnet_buffer (b0)->sw_if_index[VLIB_TX] = fib_index;
int l4_header_offset = ip46_fill_l3_header (pa46, b0, is_ip6);
/* set the src address in the buffer */
if (!ip46_set_src_address (sw_if_index, b0, is_ip6))
ERROR_OUT (SEND_PING_NO_SRC_ADDRESS);
if (verbose)
ip46_print_buffer_src_address (vm, b0, is_ip6);
data_len =
ip46_fill_icmp_request_at (vm, l4_header_offset, seq_host, id_host,
data_len, b0, is_ip6);
ip46_fix_len_and_csum (vm, l4_header_offset, data_len, b0, is_ip6);
int n_sent = ip46_enqueue_packet (vm, b0, burst, is_ip6);
if (n_sent < burst)
err = SEND_PING_NO_BUFFERS;
done:
if (err != SEND_PING_OK)
{
if (n_buf0 > 0)
vlib_buffer_free (vm, &bi0, 1);
}
return err;
}
static send_ip46_ping_result_t
send_ip6_ping (vlib_main_t * vm,
u32 table_id, ip6_address_t * pa6,
u32 sw_if_index, u16 seq_host, u16 id_host, u16 data_len,
u32 burst, u8 verbose)
{
ip46_address_t target;
target.ip6 = *pa6;
return send_ip46_ping (vm, table_id, &target, sw_if_index, seq_host,
id_host, data_len, burst, verbose, 1 /* is_ip6 */ );
}
static send_ip46_ping_result_t
send_ip4_ping (vlib_main_t * vm,
u32 table_id, ip4_address_t * pa4,
u32 sw_if_index, u16 seq_host, u16 id_host, u16 data_len,
u32 burst, u8 verbose)
{
ip46_address_t target;
ip46_address_set_ip4 (&target, pa4);
return send_ip46_ping (vm, table_id, &target, sw_if_index, seq_host,
id_host, data_len, burst, verbose, 0 /* is_ip6 */ );
}
static void
print_ip46_icmp_reply (vlib_main_t * vm, u32 bi0, int is_ip6)
{
vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
int l4_offset;
void *paddr;
void *format_addr_func;
u16 payload_length;
u8 ttl;
if (is_ip6)
{
ip6_header_t *ip6 = vlib_buffer_get_current (b0);
paddr = (void *) &ip6->src_address;
format_addr_func = (void *) format_ip6_address;
ttl = ip6->hop_limit;
l4_offset = sizeof (ip6_header_t); // FIXME - EH processing ?
payload_length = clib_net_to_host_u16 (ip6->payload_length);
}
else
{
ip4_header_t *ip4 = vlib_buffer_get_current (b0);
paddr = (void *) &ip4->src_address;
format_addr_func = (void *) format_ip4_address;
ttl = ip4->ttl;
l4_offset = ip4_header_bytes (ip4);
payload_length =
clib_net_to_host_u16 (ip4->length) + ip4_header_bytes (ip4);
}
icmp46_header_t *icmp = vlib_buffer_get_current (b0) + l4_offset;
icmp46_echo_request_t *icmp_echo = (icmp46_echo_request_t *) (icmp + 1);
u64 *dataplane_ts = (u64 *) & vnet_buffer (b0)->unused[0];
f64 clocks_per_second = ((f64) vm->clib_time.clocks_per_second);
f64 rtt =
((f64) (*dataplane_ts - icmp_echo->time_sent)) / clocks_per_second;
vlib_cli_output (vm,
"%d bytes from %U: icmp_seq=%d ttl=%d time=%.4f ms",
payload_length,
format_addr_func,
paddr,
clib_host_to_net_u16 (icmp_echo->seq), ttl, rtt * 1000.0);
}
/*
* Perform the ping run with the given parameters in the current CLI process.
* Depending on whether pa4 or pa6 is set, runs IPv4 or IPv6 ping.
* The amusing side effect is of course if both are set, then both pings are sent.
* This behavior can be used to ping a dualstack host over IPv4 and IPv6 at once.
*/
static void
run_ping_ip46_address (vlib_main_t * vm, u32 table_id, ip4_address_t * pa4,
ip6_address_t * pa6, u32 sw_if_index,
f64 ping_interval, u32 ping_repeat, u32 data_len,
u32 ping_burst, u32 verbose)
{
int i;
uword curr_proc = vlib_current_process (vm);
u32 n_replies = 0;
u32 n_requests = 0;
u16 icmp_id;
static u32 rand_seed = 0;
if (PREDICT_FALSE (!rand_seed))
rand_seed = random_default_seed ();
icmp_id = random_u32 (&rand_seed) & 0xffff;
while (~0 != get_cli_process_id_by_icmp_id_mt (vm, icmp_id))
{
vlib_cli_output (vm, "ICMP ID collision at %d, incrementing", icmp_id);
icmp_id++;
}
set_cli_process_id_by_icmp_id_mt (vm, icmp_id, curr_proc);
for (i = 1; i <= ping_repeat; i++)
{
send_ip46_ping_result_t res = SEND_PING_OK;
f64 sleep_interval;
f64 time_ping_sent = vlib_time_now (vm);
if (pa6)
{
res = send_ip6_ping (vm, table_id,
pa6, sw_if_index, i, icmp_id,
data_len, ping_burst, verbose);
if (SEND_PING_OK == res)
n_requests += ping_burst;
else
vlib_cli_output (vm, "Failed: %U", format_ip46_ping_result, res);
}
if (pa4)
{
res = send_ip4_ping (vm, table_id, pa4,
sw_if_index, i, icmp_id, data_len,
ping_burst, verbose);
if (SEND_PING_OK == res)
n_requests += ping_burst;
else
vlib_cli_output (vm, "Failed: %U", format_ip46_ping_result, res);
}
/* Collect and print the responses until it is time to send a next ping */
while ((i <= ping_repeat)
&&
((sleep_interval =
time_ping_sent + ping_interval - vlib_time_now (vm)) > 0.0))
{
uword event_type, *event_data = 0;
vlib_process_wait_for_event_or_clock (vm, sleep_interval);
event_type = vlib_process_get_events (vm, &event_data);
switch (event_type)
{
case ~0: /* no events => timeout */
break;
case PING_RESPONSE_IP6:
/* fall-through */
case PING_RESPONSE_IP4:
{
int ii;
int is_ip6 = (event_type == PING_RESPONSE_IP6);
for (ii = 0; ii < vec_len (event_data); ii++)
{
u32 bi0 = event_data[ii];
print_ip46_icmp_reply (vm, bi0, is_ip6);
n_replies++;
if (0 != bi0)
vlib_buffer_free (vm, &bi0, 1);
}
}
break;
default:
/* someone pressed a key, abort */
vlib_cli_output (vm, "Aborted due to a keypress.");
goto double_break;
break;
}
vec_free (event_data);
}
}
double_break:
vlib_cli_output (vm, "\n");
{
float loss =
(0 ==
n_requests) ? 0 : 100.0 * ((float) n_requests -
(float) n_replies) / (float) n_requests;
vlib_cli_output (vm,
"Statistics: %u sent, %u received, %f%% packet loss\n",
n_requests, n_replies, loss);
clear_cli_process_id_by_icmp_id_mt (vm, icmp_id);
}
}
static clib_error_t *
ping_ip_address (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
ip4_address_t a4;
ip6_address_t a6;
clib_error_t *error = 0;
u32 ping_repeat = 5;
u32 ping_burst = 1;
u8 ping_ip4, ping_ip6;
vnet_main_t *vnm = vnet_get_main ();
u32 data_len = PING_DEFAULT_DATA_LEN;
u32 verbose = 0;
f64 ping_interval = PING_DEFAULT_INTERVAL;
u32 sw_if_index, table_id;
table_id = 0;
ping_ip4 = ping_ip6 = 0;
sw_if_index = ~0;
if (unformat (input, "%U", unformat_ip4_address, &a4))
{
ping_ip4 = 1;
}
else if (unformat (input, "%U", unformat_ip6_address, &a6))
{
ping_ip6 = 1;
}
else if (unformat (input, "ipv4"))
{
if (unformat (input, "%U", unformat_ip4_address, &a4))
{
ping_ip4 = 1;
}
else
{
error =
clib_error_return (0,
"expecting IPv4 address but got `%U'",
format_unformat_error, input);
}
}
else if (unformat (input, "ipv6"))
{
if (unformat (input, "%U", unformat_ip6_address, &a6))
{
ping_ip6 = 1;
}
else
{
error =
clib_error_return (0,
"expecting IPv6 address but got `%U'",
format_unformat_error, input);
}
}
else
{
error =
clib_error_return (0,
"expecting IP4/IP6 address `%U'. Usage: ping <addr> [source <intf>] [size <datasz>] [repeat <count>] [verbose]",
format_unformat_error, input);
goto done;
}
/* allow for the second AF in the same ping */
if (!ping_ip4 && (unformat (input, "ipv4")))
{
if (unformat (input, "%U", unformat_ip4_address, &a4))
{
ping_ip4 = 1;
}
}
else if (!ping_ip6 && (unformat (input, "ipv6")))
{
if (unformat (input, "%U", unformat_ip6_address, &a6))
{
ping_ip6 = 1;
}
}
/* parse the rest of the parameters in a cycle */
while (!unformat_eof (input, NULL))
{
if (unformat (input, "source"))
{
if (!unformat_user
(input, unformat_vnet_sw_interface, vnm, &sw_if_index))
{
error =
clib_error_return (0,
"unknown interface `%U'",
format_unformat_error, input);
goto done;
}
}
else if (unformat (input, "size"))
{
if (!unformat (input, "%u", &data_len))
{
error =
clib_error_return (0,
"expecting size but got `%U'",
format_unformat_error, input);
goto done;
}
if (data_len > PING_MAXIMUM_DATA_SIZE)
{
error =
clib_error_return (0,
"%d is bigger than maximum allowed payload size %d",
data_len, PING_MAXIMUM_DATA_SIZE);
goto done;
}
}
else if (unformat (input, "table-id"))
{
if (!unformat (input, "%u", &table_id))
{
error =
clib_error_return (0,
"expecting table-id but got `%U'",
format_unformat_error, input);
goto done;
}
}
else if (unformat (input, "interval"))
{
if (!unformat (input, "%f", &ping_interval))
{
error =
clib_error_return (0,
"expecting interval (floating point number) got `%U'",
format_unformat_error, input);
goto done;
}
}
else if (unformat (input, "repeat"))
{
if (!unformat (input, "%u", &ping_repeat))
{
error =
clib_error_return (0,
"expecting repeat count but got `%U'",
format_unformat_error, input);
goto done;
}
}
else if (unformat (input, "burst"))
{
if (!unformat (input, "%u", &ping_burst))
{
error =
clib_error_return (0,
"expecting burst count but got `%U'",
format_unformat_error, input);
goto done;
}
}
else if (unformat (input, "verbose"))
{
verbose = 1;
}
else
{
error = clib_error_return (0, "unknown input `%U'",
format_unformat_error, input);
goto done;
}
}
/*
* Operationally, one won't (and shouldn't) need to send more than a frame worth of pings.
* But it may be handy during the debugging.
*/
#ifdef CLIB_DEBUG
#define MAX_PING_BURST (10*VLIB_FRAME_SIZE)
#else
#define MAX_PING_BURST (VLIB_FRAME_SIZE)
#endif
if (ping_burst < 1 || ping_burst > MAX_PING_BURST)
return clib_error_return (0, "burst size must be between 1 and %u",
MAX_PING_BURST);
run_ping_ip46_address (vm, table_id, ping_ip4 ? &a4 : NULL,
ping_ip6 ? &a6 : NULL, sw_if_index, ping_interval,
ping_repeat, data_len, ping_burst, verbose);
done:
return error;
}
/*?
* This command sends an ICMP ECHO_REQUEST to network hosts. The address
* can be an IPv4 or IPv6 address (or both at the same time).
*
* @cliexpar
* @parblock
* Example of how ping an IPv4 address:
* @cliexstart{ping 172.16.1.2 source GigabitEthernet2/0/0 repeat 2}
* 64 bytes from 172.16.1.2: icmp_seq=1 ttl=64 time=.1090 ms
* 64 bytes from 172.16.1.2: icmp_seq=2 ttl=64 time=.0914 ms
*
* Statistics: 2 sent, 2 received, 0% packet loss
* @cliexend
*
* Example of how ping both an IPv4 address and IPv6 address at the same time:
* @cliexstart{ping 172.16.1.2 ipv6 fe80::24a5:f6ff:fe9c:3a36 source GigabitEthernet2/0/0 repeat 2 verbose}
* Adjacency index: 10, sw_if_index: 1
* Adj: ip6-discover-neighbor
* Adj Interface: 0
* Forced set interface: 1
* Adjacency index: 0, sw_if_index: 4294967295
* Adj: ip4-miss
* Adj Interface: 0
* Forced set interface: 1
* Source address: 172.16.1.1
* 64 bytes from 172.16.1.2: icmp_seq=1 ttl=64 time=.1899 ms
* Adjacency index: 10, sw_if_index: 1
* Adj: ip6-discover-neighbor
* Adj Interface: 0
* Forced set interface: 1
* Adjacency index: 0, sw_if_index: 4294967295
* Adj: ip4-miss
* Adj Interface: 0
* Forced set interface: 1
* Source address: 172.16.1.1
* 64 bytes from 172.16.1.2: icmp_seq=2 ttl=64 time=.0910 ms
*
* Statistics: 4 sent, 2 received, 50% packet loss
* @cliexend
* @endparblock
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (ping_command, static) =
{
.path = "ping",
.function = ping_ip_address,
.short_help = "ping {<ip-addr> | ipv4 <ip4-addr> | ipv6 <ip6-addr>}"
" [ipv4 <ip4-addr> | ipv6 <ip6-addr>] [source <interface>]"
" [size <pktsize:60>] [interval <sec:1>] [repeat <cnt:5>] [table-id <id:0>]"
" [burst <count:1>] [verbose]",
.is_mp_safe = 1,
};
/* *INDENT-ON* */
static clib_error_t *
ping_cli_init (vlib_main_t * vm)
{
vlib_thread_main_t *tm = vlib_get_thread_main ();
ping_main_t *pm = &ping_main;
pm->ip6_main = &ip6_main;
pm->ip4_main = &ip4_main;
icmp6_register_type (vm, ICMP6_echo_reply, ip6_icmp_echo_reply_node.index);
ip4_icmp_register_type (vm, ICMP4_echo_reply,
ip4_icmp_echo_reply_node.index);
if (tm->n_vlib_mains > 1)
clib_spinlock_init (&pm->ping_run_check_lock);
return 0;
}
VLIB_INIT_FUNCTION (ping_cli_init);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/