From 3ae2873e568dd441a22903ab9f8c7954835b0bf1 Mon Sep 17 00:00:00 2001 From: Dave Barach Date: Fri, 16 Nov 2018 17:19:00 -0500 Subject: pcap-based dispatch tracer To facilitate dispatch trajectory tracing, vlib_buffer_t decoding, etc. through Wireshark Change-Id: I31356b9fa1f40cba8830aaf10a86a9fbb7546438 Signed-off-by: Dave Barach --- src/vnet/unix/pcap.c | 269 --------------------------------------------------- 1 file changed, 269 deletions(-) delete mode 100644 src/vnet/unix/pcap.c (limited to 'src/vnet/unix/pcap.c') diff --git a/src/vnet/unix/pcap.c b/src/vnet/unix/pcap.c deleted file mode 100644 index 3c9ce314d9c..00000000000 --- a/src/vnet/unix/pcap.c +++ /dev/null @@ -1,269 +0,0 @@ -/* - * 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. - */ -/* - * pcap.c: libpcap packet capture format - * - * 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 -#include - -/** - * @file - * @brief PCAP function. - * - * Usage: - * - * 
- * \#include 
- *
- * static pcap_main_t pcap = {
- *  .file_name = "/tmp/ip4",
- *  .n_packets_to_capture = 2,
- *  .packet_type = PCAP_PACKET_TYPE_ip,
- * };
- *
- * - * To add a buffer: - * - * 
pcap_add_buffer (&pcap, vm, pi0, 128);
 - * - * File will be written after @c n_packets_to_capture or call to pcap_write (&pcap). - * -*/ - -/** - * @brief Close PCAP file - * - * @return rc - clib_error_t - * - */ -clib_error_t * -pcap_close (pcap_main_t * pm) -{ - close (pm->file_descriptor); - pm->flags &= ~PCAP_MAIN_INIT_DONE; - pm->file_descriptor = -1; - return 0; -} - -/** - * @brief Write PCAP file - * - * @return rc - clib_error_t - * - */ -clib_error_t * -pcap_write (pcap_main_t * pm) -{ - clib_error_t *error = 0; - - if (!(pm->flags & PCAP_MAIN_INIT_DONE)) - { - pcap_file_header_t fh; - int n; - - if (!pm->file_name) - pm->file_name = "/tmp/vnet.pcap"; - - pm->file_descriptor = - open (pm->file_name, O_CREAT | O_TRUNC | O_WRONLY, 0664); - if (pm->file_descriptor < 0) - { - error = - clib_error_return_unix (0, "failed to open `%s'", pm->file_name); - goto done; - } - - pm->flags |= PCAP_MAIN_INIT_DONE; - pm->n_packets_captured = 0; - pm->n_pcap_data_written = 0; - clib_spinlock_init (&pm->lock); - - /* Write file header. */ - clib_memset (&fh, 0, sizeof (fh)); - fh.magic = 0xa1b2c3d4; - fh.major_version = 2; - fh.minor_version = 4; - fh.time_zone = 0; - fh.max_packet_size_in_bytes = 1 << 16; - fh.packet_type = pm->packet_type; - n = write (pm->file_descriptor, &fh, sizeof (fh)); - if (n != sizeof (fh)) - { - if (n < 0) - error = - clib_error_return_unix (0, "write file header `%s'", - pm->file_name); - else - error = - clib_error_return (0, "short write of file header `%s'", - pm->file_name); - goto done; - } - } - - while (vec_len (pm->pcap_data) > pm->n_pcap_data_written) - { - int n = vec_len (pm->pcap_data) - pm->n_pcap_data_written; - - n = write (pm->file_descriptor, - vec_elt_at_index (pm->pcap_data, pm->n_pcap_data_written), - n); - - if (n < 0 && unix_error_is_fatal (errno)) - { - error = clib_error_return_unix (0, "write `%s'", pm->file_name); - goto done; - } - pm->n_pcap_data_written += n; - } - - if (pm->n_pcap_data_written >= vec_len (pm->pcap_data)) - { - vec_reset_length (pm->pcap_data); - pm->n_pcap_data_written = 0; - } - - if (pm->n_packets_captured >= pm->n_packets_to_capture) - pcap_close (pm); - -done: - if (error) - { - if (pm->file_descriptor >= 0) - close (pm->file_descriptor); - } - return error; -} - -/** - * @brief Read PCAP file - * - * @return rc - clib_error_t - * - */ -clib_error_t * -pcap_read (pcap_main_t * pm) -{ - clib_error_t *error = 0; - int fd, need_swap, n; - pcap_file_header_t fh; - pcap_packet_header_t ph; - - fd = open (pm->file_name, O_RDONLY); - if (fd < 0) - { - error = clib_error_return_unix (0, "open `%s'", pm->file_name); - goto done; - } - - if (read (fd, &fh, sizeof (fh)) != sizeof (fh)) - { - error = - clib_error_return_unix (0, "read file header `%s'", pm->file_name); - goto done; - } - - need_swap = 0; - if (fh.magic == 0xd4c3b2a1) - { - need_swap = 1; -#define _(t,f) fh.f = clib_byte_swap_##t (fh.f); - foreach_pcap_file_header; -#undef _ - } - - if (fh.magic != 0xa1b2c3d4) - { - error = clib_error_return (0, "bad magic `%s'", pm->file_name); - goto done; - } - - pm->min_packet_bytes = 0; - pm->max_packet_bytes = 0; - while ((n = read (fd, &ph, sizeof (ph))) != 0) - { - u8 *data; - u64 timestamp; - u32 timestamp_sec; - u32 timestamp_usec; - - if (need_swap) - { -#define _(t,f) ph.f = clib_byte_swap_##t (ph.f); - foreach_pcap_packet_header; -#undef _ - } - - data = vec_new (u8, ph.n_bytes_in_packet); - if (read (fd, data, ph.n_packet_bytes_stored_in_file) != - ph.n_packet_bytes_stored_in_file) - { - error = clib_error_return (0, "short read `%s'", pm->file_name); - goto done; - } - - if (vec_len (pm->packets_read) == 0) - pm->min_packet_bytes = pm->max_packet_bytes = ph.n_bytes_in_packet; - else - { - pm->min_packet_bytes = - clib_min (pm->min_packet_bytes, ph.n_bytes_in_packet); - pm->max_packet_bytes = - clib_max (pm->max_packet_bytes, ph.n_bytes_in_packet); - } - - timestamp_sec = ph.time_in_sec; - timestamp_usec = ph.time_in_usec; - timestamp = ((u64) timestamp_sec) * 1000000 + (u64) timestamp_usec; - vec_add1 (pm->packets_read, data); - vec_add1 (pm->timestamps, timestamp); - } - -done: - if (fd >= 0) - close (fd); - return error; - -} - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ -- cgit 1.2.3-korg