1 /* 2 * p_ip6.c packet editor: IPV6 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: Amir Vadai <amir (at) vadai.me> 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_ip6(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_IP6; 41 42 if (strcmp(*argv, "src") == 0) { 43 NEXT_ARG(); 44 tkey->off = 8; 45 res = parse_cmd(&argc, &argv, 16, TIPV6, RU32, sel, tkey); 46 goto done; 47 } 48 if (strcmp(*argv, "dst") == 0) { 49 NEXT_ARG(); 50 tkey->off = 24; 51 res = parse_cmd(&argc, &argv, 16, TIPV6, RU32, sel, tkey); 52 goto done; 53 } 54 if (strcmp(*argv, "flow_lbl") == 0) { 55 NEXT_ARG(); 56 tkey->off = 0; 57 res = parse_cmd(&argc, &argv, 4, TU32, 0x0007ffff, sel, tkey); 58 goto done; 59 } 60 if (strcmp(*argv, "payload_len") == 0) { 61 NEXT_ARG(); 62 tkey->off = 4; 63 res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey); 64 goto done; 65 } 66 if (strcmp(*argv, "nexthdr") == 0) { 67 NEXT_ARG(); 68 tkey->off = 6; 69 res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey); 70 goto done; 71 } 72 if (strcmp(*argv, "hoplimit") == 0) { 73 NEXT_ARG(); 74 tkey->off = 7; 75 res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey); 76 goto done; 77 } 78 79 return -1; 80 81 done: 82 *argc_p = argc; 83 *argv_p = argv; 84 return res; 85 } 86 87 struct m_pedit_util p_pedit_ip6 = { 88 NULL, 89 "ipv6", 90 parse_ip6, 91 }; 92
