1 /* 2 * m_pedit_udp.c packet editor: UDP header 3 * 4 * This program is free software; you can distribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 * 9 * Authors: J Hadi Salim (hadi (at) cyberus.ca) 10 * 11 */ 12 13 #include <stdio.h> 14 #include <stdlib.h> 15 #include <unistd.h> 16 #include <syslog.h> 17 #include <fcntl.h> 18 #include <sys/socket.h> 19 #include <netinet/in.h> 20 #include <arpa/inet.h> 21 #include <string.h> 22 #include "utils.h" 23 #include "tc_util.h" 24 #include "m_pedit.h" 25 26 static int 27 parse_udp(int *argc_p, char ***argv_p, 28 struct m_pedit_sel *sel, struct m_pedit_key *tkey) 29 { 30 int res = -1; 31 int argc = *argc_p; 32 char **argv = *argv_p; 33 34 if (argc < 2) 35 return -1; 36 37 if (!sel->extended) 38 return -1; 39 40 tkey->htype = TCA_PEDIT_KEY_EX_HDR_TYPE_UDP; 41 42 if (strcmp(*argv, "sport") == 0) { 43 NEXT_ARG(); 44 tkey->off = 0; 45 res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey); 46 goto done; 47 } 48 49 if (strcmp(*argv, "dport") == 0) { 50 NEXT_ARG(); 51 tkey->off = 2; 52 res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey); 53 goto done; 54 } 55 56 return -1; 57 58 done: 59 *argc_p = argc; 60 *argv_p = argv; 61 return res; 62 } 63 64 struct m_pedit_util p_pedit_udp = { 65 NULL, 66 "udp", 67 parse_udp, 68 }; 69
