| /* 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 |
| * |
| * This program is free software: you can redistribute it and/or modify |
| * it under the terms of the GNU Affero General Public License as published by |
| * the Free Software Foundation, either version 3 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 Affero General Public License for more details. |
| * |
| * You should have received a copy of the GNU Affero General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| #include <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; |
| } |