Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 1 | /* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu> |
| 2 | * Patrick Schaaf <bof@bof.de> |
| 3 | * Martin Josefsson <gandalf@wlug.westbo.se> |
| 4 | * Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | /* Shared library add-on to iptables to add IP set matching. */ |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 12 | #include <stdio.h> |
| 13 | #include <netdb.h> |
| 14 | #include <string.h> |
| 15 | #include <stdlib.h> |
| 16 | #include <getopt.h> |
| 17 | #include <ctype.h> |
| 18 | #include <errno.h> |
| 19 | |
Jan Engelhardt | 5d9678a | 2008-11-20 10:15:35 +0100 | [diff] [blame] | 20 | #include <xtables.h> |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 21 | #include <linux/netfilter_ipv4/ipt_set.h> |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 22 | #include "libipt_set.h" |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 23 | |
Jan Engelhardt | 59d1640 | 2007-10-04 16:28:39 +0000 | [diff] [blame] | 24 | static void set_help(void) |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 25 | { |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 26 | printf("set match options:\n" |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 27 | " [!] --set name flags\n" |
| 28 | " 'name' is the set name from to match,\n" |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 29 | " 'flags' are the comma separated list of\n" |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 30 | " 'src' and 'dst'.\n"); |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 31 | } |
| 32 | |
Jan Engelhardt | 59d1640 | 2007-10-04 16:28:39 +0000 | [diff] [blame] | 33 | static const struct option set_opts[] = { |
Patrick McHardy | 0ea82bc | 2008-06-07 15:15:29 +0200 | [diff] [blame] | 34 | {"set", 1, NULL, '1'}, |
| 35 | { } |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 36 | }; |
| 37 | |
Jan Engelhardt | 59d1640 | 2007-10-04 16:28:39 +0000 | [diff] [blame] | 38 | static void set_init(struct xt_entry_match *match) |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 39 | { |
| 40 | struct ipt_set_info_match *info = |
| 41 | (struct ipt_set_info_match *) match->data; |
| 42 | |
| 43 | |
| 44 | memset(info, 0, sizeof(struct ipt_set_info_match)); |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 45 | |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 46 | } |
| 47 | |
Jan Engelhardt | 59d1640 | 2007-10-04 16:28:39 +0000 | [diff] [blame] | 48 | static int set_parse(int c, char **argv, int invert, unsigned int *flags, |
| 49 | const void *entry, struct xt_entry_match **match) |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 50 | { |
| 51 | struct ipt_set_info_match *myinfo = |
| 52 | (struct ipt_set_info_match *) (*match)->data; |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 53 | struct ipt_set_info *info = &myinfo->match_set; |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 54 | |
| 55 | switch (c) { |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 56 | case '1': /* --set <set> <flag>[,<flag> */ |
| 57 | if (info->flags[0]) |
| 58 | exit_error(PARAMETER_PROBLEM, |
| 59 | "--set can be specified only once"); |
| 60 | |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 61 | check_inverse(optarg, &invert, &optind, 0); |
| 62 | if (invert) |
| 63 | info->flags[0] |= IPSET_MATCH_INV; |
| 64 | |
| 65 | if (!argv[optind] |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 66 | || argv[optind][0] == '-' |
| 67 | || argv[optind][0] == '!') |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 68 | exit_error(PARAMETER_PROBLEM, |
| 69 | "--set requires two args."); |
| 70 | |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 71 | if (strlen(argv[optind-1]) > IP_SET_MAXNAMELEN - 1) |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 72 | exit_error(PARAMETER_PROBLEM, |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 73 | "setname `%s' too long, max %d characters.", |
| 74 | argv[optind-1], IP_SET_MAXNAMELEN - 1); |
| 75 | |
| 76 | get_set_byname(argv[optind - 1], info); |
| 77 | parse_bindings(argv[optind], info); |
| 78 | DEBUGP("parse: set index %u\n", info->index); |
| 79 | optind++; |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 80 | |
| 81 | *flags = 1; |
| 82 | break; |
| 83 | |
| 84 | default: |
| 85 | return 0; |
| 86 | } |
| 87 | |
| 88 | return 1; |
| 89 | } |
| 90 | |
Jan Engelhardt | 59d1640 | 2007-10-04 16:28:39 +0000 | [diff] [blame] | 91 | static void set_check(unsigned int flags) |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 92 | { |
| 93 | if (!flags) |
| 94 | exit_error(PARAMETER_PROBLEM, |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 95 | "You must specify `--set' with proper arguments"); |
| 96 | DEBUGP("final check OK\n"); |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | static void |
| 100 | print_match(const char *prefix, const struct ipt_set_info *info) |
| 101 | { |
| 102 | int i; |
| 103 | char setname[IP_SET_MAXNAMELEN]; |
| 104 | |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 105 | get_set_byid(setname, info->index); |
| 106 | printf("%s%s %s", |
Joszef Kadlecsik | a05720b | 2006-06-23 09:55:12 +0000 | [diff] [blame] | 107 | (info->flags[0] & IPSET_MATCH_INV) ? "! " : "", |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 108 | prefix, |
| 109 | setname); |
| 110 | for (i = 0; i < IP_SET_MAX_BINDINGS; i++) { |
| 111 | if (!info->flags[i]) |
| 112 | break; |
| 113 | printf("%s%s", |
| 114 | i == 0 ? " " : ",", |
| 115 | info->flags[i] & IPSET_SRC ? "src" : "dst"); |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 116 | } |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 117 | printf(" "); |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 118 | } |
| 119 | |
| 120 | /* Prints out the matchinfo. */ |
Jan Engelhardt | 59d1640 | 2007-10-04 16:28:39 +0000 | [diff] [blame] | 121 | static void set_print(const void *ip, const struct xt_entry_match *match, |
| 122 | int numeric) |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 123 | { |
| 124 | struct ipt_set_info_match *info = |
| 125 | (struct ipt_set_info_match *) match->data; |
| 126 | |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 127 | print_match("set", &info->match_set); |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 128 | } |
| 129 | |
Jan Engelhardt | 59d1640 | 2007-10-04 16:28:39 +0000 | [diff] [blame] | 130 | static void set_save(const void *ip, const struct xt_entry_match *match) |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 131 | { |
| 132 | struct ipt_set_info_match *info = |
| 133 | (struct ipt_set_info_match *) match->data; |
| 134 | |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 135 | print_match("--set", &info->match_set); |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 136 | } |
| 137 | |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 138 | static struct xtables_match set_mt_reg = { |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 139 | .name = "set", |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 140 | .version = XTABLES_VERSION, |
Jan Engelhardt | 03d9948 | 2008-11-18 12:27:54 +0100 | [diff] [blame] | 141 | .family = NFPROTO_IPV4, |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 142 | .size = XT_ALIGN(sizeof(struct ipt_set_info_match)), |
| 143 | .userspacesize = XT_ALIGN(sizeof(struct ipt_set_info_match)), |
Jan Engelhardt | 59d1640 | 2007-10-04 16:28:39 +0000 | [diff] [blame] | 144 | .help = set_help, |
| 145 | .init = set_init, |
| 146 | .parse = set_parse, |
| 147 | .final_check = set_check, |
| 148 | .print = set_print, |
| 149 | .save = set_save, |
| 150 | .extra_opts = set_opts, |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 151 | }; |
| 152 | |
| 153 | void _init(void) |
| 154 | { |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 155 | xtables_register_match(&set_mt_reg); |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 156 | } |