1 /* 2 * m_pedit.c packet editor: IPV4/6 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_ip(int *argc_p, char ***argv_p,struct tc_pedit_sel *sel,struct tc_pedit_key *tkey) 28 { 29 int res = -1; 30 int argc = *argc_p; 31 char **argv = *argv_p; 32 33 if (argc < 2) 34 return -1; 35 36 if (strcmp(*argv, "src") == 0) { 37 NEXT_ARG(); 38 tkey->off = 12; 39 res = parse_cmd(&argc, &argv, 4, TIPV4,RU32,sel,tkey); 40 goto done; 41 } 42 if (strcmp(*argv, "dst") == 0) { 43 NEXT_ARG(); 44 tkey->off = 16; 45 res = parse_cmd(&argc, &argv, 4, TIPV4,RU32,sel,tkey); 46 goto done; 47 } 48 /* jamal - look at these and make them either old or new 49 ** scheme given diffserv 50 ** dont forget the CE bit 51 */ 52 if (strcmp(*argv, "tos") == 0 || matches(*argv, "dsfield") == 0) { 53 NEXT_ARG(); 54 tkey->off = 1; 55 res = parse_cmd(&argc, &argv, 1, TU32,RU8,sel,tkey); 56 goto done; 57 } 58 if (strcmp(*argv, "ihl") == 0) { 59 NEXT_ARG(); 60 tkey->off = 0; 61 res = parse_cmd(&argc, &argv, 1, TU32,RU8,sel,tkey); 62 goto done; 63 } 64 if (strcmp(*argv, "protocol") == 0) { 65 NEXT_ARG(); 66 tkey->off = 9; 67 res = parse_cmd(&argc, &argv, 1, TU32,RU8,sel,tkey); 68 goto done; 69 } 70 /* jamal - fix this */ 71 if (matches(*argv, "precedence") == 0) { 72 NEXT_ARG(); 73 tkey->off = 1; 74 res = parse_cmd(&argc, &argv, 1, TU32,RU8,sel,tkey); 75 goto done; 76 } 77 /* jamal - validate this at some point */ 78 if (strcmp(*argv, "nofrag") == 0) { 79 NEXT_ARG(); 80 tkey->off = 6; 81 res = parse_cmd(&argc, &argv, 1, TU32,0x3F,sel,tkey); 82 goto done; 83 } 84 /* jamal - validate this at some point */ 85 if (strcmp(*argv, "firstfrag") == 0) { 86 NEXT_ARG(); 87 tkey->off = 6; 88 res = parse_cmd(&argc, &argv, 1, TU32,0x1F,sel,tkey); 89 goto done; 90 } 91 if (strcmp(*argv, "ce") == 0) { 92 NEXT_ARG(); 93 tkey->off = 6; 94 res = parse_cmd(&argc, &argv, 1, TU32,0x80,sel,tkey); 95 goto done; 96 } 97 if (strcmp(*argv, "df") == 0) { 98 NEXT_ARG(); 99 tkey->off = 6; 100 res = parse_cmd(&argc, &argv, 1, TU32,0x40,sel,tkey); 101 goto done; 102 } 103 if (strcmp(*argv, "mf") == 0) { 104 NEXT_ARG(); 105 tkey->off = 6; 106 res = parse_cmd(&argc, &argv, 1, TU32,0x20,sel,tkey); 107 goto done; 108 } 109 if (strcmp(*argv, "dport") == 0) { 110 NEXT_ARG(); 111 tkey->off = 22; 112 res = parse_cmd(&argc, &argv, 2, TU32,RU16,sel,tkey); 113 goto done; 114 } 115 if (strcmp(*argv, "sport") == 0) { 116 NEXT_ARG(); 117 tkey->off = 20; 118 res = parse_cmd(&argc, &argv, 2, TU32,RU16,sel,tkey); 119 goto done; 120 } 121 if (strcmp(*argv, "icmp_type") == 0) { 122 NEXT_ARG(); 123 tkey->off = 20; 124 res = parse_cmd(&argc, &argv, 1, TU32,RU8,sel,tkey); 125 goto done; 126 } 127 if (strcmp(*argv, "icmp_code") == 0) { 128 NEXT_ARG(); 129 tkey->off = 20; 130 res = parse_cmd(&argc, &argv, 1, TU32,RU8,sel,tkey); 131 goto done; 132 } 133 return -1; 134 135 done: 136 *argc_p = argc; 137 *argv_p = argv; 138 return res; 139 } 140 141 static int 142 parse_ip6(int *argc_p, char ***argv_p,struct tc_pedit_sel *sel,struct tc_pedit_key *tkey) 143 { 144 int res = -1; 145 return res; 146 } 147 148 struct m_pedit_util p_pedit_ip = { 149 NULL, 150 "ip", 151 parse_ip, 152 }; 153 154 155 struct m_pedit_util p_pedit_ip6 = { 156 NULL, 157 "ip6", 158 parse_ip6, 159 }; 160
