85 lines
2.0 KiB
C
85 lines
2.0 KiB
C
/* PCAP code from OpenBSC done by Holger Freyther */
|
|
/*
|
|
* (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
|
|
* (C) 2010 by On-Waves
|
|
* All Rights Reserved
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
*/
|
|
|
|
#include <osmocom/mtp/mtp_pcap.h>
|
|
|
|
#include <sys/time.h>
|
|
|
|
#include <unistd.h>
|
|
|
|
#define static_assert(exp, name) typedef int dummy##name [(exp) ? 1 : -1];
|
|
|
|
/*
|
|
* pcap writing of the misdn load
|
|
* pcap format is from http://wiki.wireshark.org/Development/LibpcapFileFormat
|
|
*/
|
|
struct pcap_hdr {
|
|
uint32_t magic_number;
|
|
uint16_t version_major;
|
|
uint16_t version_minor;
|
|
int32_t thiszone;
|
|
uint32_t sigfigs;
|
|
uint32_t snaplen;
|
|
uint32_t network;
|
|
} __attribute__((packed));
|
|
|
|
struct pcaprec_hdr {
|
|
uint32_t ts_sec;
|
|
uint32_t ts_usec;
|
|
uint32_t incl_len;
|
|
uint32_t orig_len;
|
|
} __attribute__((packed));
|
|
|
|
int mtp_pcap_write_header(int fd)
|
|
{
|
|
static struct pcap_hdr hdr = {
|
|
.magic_number = 0xa1b2c3d4,
|
|
.version_major = 2,
|
|
.version_minor = 4,
|
|
.thiszone = 0,
|
|
.sigfigs = 0,
|
|
.snaplen = 65535,
|
|
.network = 141,
|
|
};
|
|
|
|
return write(fd, &hdr, sizeof(hdr));
|
|
}
|
|
|
|
int mtp_pcap_write_msu(int fd, const uint8_t *data, int length)
|
|
{
|
|
int rc_h, rc_d;
|
|
struct timeval tv;
|
|
struct pcaprec_hdr payload_header = {
|
|
.ts_sec = 0,
|
|
.ts_usec = 0,
|
|
.incl_len = length,
|
|
.orig_len = length,
|
|
};
|
|
|
|
gettimeofday(&tv, NULL);
|
|
payload_header.ts_sec = tv.tv_sec;
|
|
payload_header.ts_usec = tv.tv_usec;
|
|
|
|
rc_h = write(fd, &payload_header, sizeof(payload_header));
|
|
rc_d = write(fd, data, length);
|
|
|
|
return rc_h == sizeof(payload_header) && rc_d == length;
|
|
}
|