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 | |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 11 | /* Shared library add-on to iptables to add IP set mangling target. */ |
| 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 | |
Jan Engelhardt | 5d9678a | 2008-11-20 10:15:35 +0100 | [diff] [blame] | 19 | #include <xtables.h> |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 20 | #include <linux/netfilter_ipv4/ip_tables.h> |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 21 | #include <linux/netfilter_ipv4/ip_set.h> |
| 22 | #include <linux/netfilter_ipv4/ipt_set.h> |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 23 | #include "libipt_set.h" |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 24 | |
Jan Engelhardt | 1d5b63d | 2007-10-04 16:29:00 +0000 | [diff] [blame] | 25 | static void SET_help(void) |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 26 | { |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 27 | printf("SET target options:\n" |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 28 | " --add-set name flags\n" |
| 29 | " --del-set name flags\n" |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 30 | " add/del src/dst IP/port from/to named sets,\n" |
| 31 | " where flags are the comma separated list of\n" |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 32 | " 'src' and 'dst'.\n"); |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 33 | } |
| 34 | |
Jan Engelhardt | 1d5b63d | 2007-10-04 16:29:00 +0000 | [diff] [blame] | 35 | static const struct option SET_opts[] = { |
Patrick McHardy | 0ea82bc | 2008-06-07 15:15:29 +0200 | [diff] [blame] | 36 | {"add-set", 1, NULL, '1'}, |
| 37 | {"del-set", 1, NULL, '2'}, |
| 38 | { } |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 39 | }; |
| 40 | |
Jan Engelhardt | 1d5b63d | 2007-10-04 16:29:00 +0000 | [diff] [blame] | 41 | static void SET_init(struct xt_entry_target *target) |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 42 | { |
| 43 | struct ipt_set_info_target *info = |
| 44 | (struct ipt_set_info_target *) target->data; |
| 45 | |
| 46 | memset(info, 0, sizeof(struct ipt_set_info_target)); |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 47 | info->add_set.index = |
| 48 | info->del_set.index = IP_SET_INVALID_ID; |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 49 | |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 50 | } |
| 51 | |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 52 | static void |
| 53 | parse_target(char **argv, int invert, unsigned int *flags, |
| 54 | struct ipt_set_info *info, const char *what) |
| 55 | { |
| 56 | if (info->flags[0]) |
| 57 | exit_error(PARAMETER_PROBLEM, |
| 58 | "--%s can be specified only once", what); |
| 59 | |
| 60 | if (check_inverse(optarg, &invert, NULL, 0)) |
| 61 | exit_error(PARAMETER_PROBLEM, |
| 62 | "Unexpected `!' after --%s", what); |
| 63 | |
| 64 | if (!argv[optind] |
| 65 | || argv[optind][0] == '-' || argv[optind][0] == '!') |
| 66 | exit_error(PARAMETER_PROBLEM, |
| 67 | "--%s requires two args.", what); |
| 68 | |
| 69 | if (strlen(argv[optind-1]) > IP_SET_MAXNAMELEN - 1) |
| 70 | exit_error(PARAMETER_PROBLEM, |
| 71 | "setname `%s' too long, max %d characters.", |
| 72 | argv[optind-1], IP_SET_MAXNAMELEN - 1); |
| 73 | |
| 74 | get_set_byname(argv[optind - 1], info); |
| 75 | parse_bindings(argv[optind], info); |
| 76 | optind++; |
| 77 | |
| 78 | *flags = 1; |
| 79 | } |
| 80 | |
Jan Engelhardt | 1d5b63d | 2007-10-04 16:29:00 +0000 | [diff] [blame] | 81 | static int SET_parse(int c, char **argv, int invert, unsigned int *flags, |
| 82 | const void *entry, struct xt_entry_target **target) |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 83 | { |
| 84 | struct ipt_set_info_target *myinfo = |
| 85 | (struct ipt_set_info_target *) (*target)->data; |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 86 | |
| 87 | switch (c) { |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 88 | case '1': /* --add-set <set> <flags> */ |
| 89 | parse_target(argv, invert, flags, |
| 90 | &myinfo->add_set, "add-set"); |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 91 | break; |
| 92 | case '2': /* --del-set <set>[:<flags>] <flags> */ |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 93 | parse_target(argv, invert, flags, |
| 94 | &myinfo->del_set, "del-set"); |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 95 | break; |
| 96 | |
| 97 | default: |
| 98 | return 0; |
| 99 | } |
| 100 | return 1; |
| 101 | } |
| 102 | |
Jan Engelhardt | 1d5b63d | 2007-10-04 16:29:00 +0000 | [diff] [blame] | 103 | static void SET_check(unsigned int flags) |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 104 | { |
| 105 | if (!flags) |
| 106 | exit_error(PARAMETER_PROBLEM, |
| 107 | "You must specify either `--add-set' or `--del-set'"); |
| 108 | } |
| 109 | |
| 110 | static void |
| 111 | print_target(const char *prefix, const struct ipt_set_info *info) |
| 112 | { |
| 113 | int i; |
| 114 | char setname[IP_SET_MAXNAMELEN]; |
Michal Pokrywka | b9e814c | 2005-03-18 08:05:10 +0000 | [diff] [blame] | 115 | |
| 116 | if (info->index == IP_SET_INVALID_ID) |
| 117 | return; |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 118 | get_set_byid(setname, info->index); |
| 119 | printf("%s %s", prefix, setname); |
| 120 | for (i = 0; i < IP_SET_MAX_BINDINGS; i++) { |
| 121 | if (!info->flags[i]) |
| 122 | break; |
| 123 | printf("%s%s", |
| 124 | i == 0 ? " " : ",", |
| 125 | info->flags[i] & IPSET_SRC ? "src" : "dst"); |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 126 | } |
Joszef Kadlecsik | b9a4938 | 2004-12-01 09:11:33 +0000 | [diff] [blame] | 127 | printf(" "); |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 128 | } |
| 129 | |
Jan Engelhardt | 1d5b63d | 2007-10-04 16:29:00 +0000 | [diff] [blame] | 130 | static void SET_print(const void *ip, const struct xt_entry_target *target, |
| 131 | int numeric) |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 132 | { |
| 133 | struct ipt_set_info_target *info = |
| 134 | (struct ipt_set_info_target *) target->data; |
| 135 | |
| 136 | print_target("add-set", &info->add_set); |
| 137 | print_target("del-set", &info->del_set); |
| 138 | } |
| 139 | |
Jan Engelhardt | 1d5b63d | 2007-10-04 16:29:00 +0000 | [diff] [blame] | 140 | static void SET_save(const void *ip, const struct xt_entry_target *target) |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 141 | { |
| 142 | struct ipt_set_info_target *info = |
| 143 | (struct ipt_set_info_target *) target->data; |
| 144 | |
| 145 | print_target("--add-set", &info->add_set); |
| 146 | print_target("--del-set", &info->del_set); |
| 147 | } |
| 148 | |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 149 | static struct xtables_target set_tg_reg = { |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 150 | .name = "SET", |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 151 | .version = XTABLES_VERSION, |
Jan Engelhardt | 03d9948 | 2008-11-18 12:27:54 +0100 | [diff] [blame] | 152 | .family = NFPROTO_IPV4, |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 153 | .size = XT_ALIGN(sizeof(struct ipt_set_info_target)), |
| 154 | .userspacesize = XT_ALIGN(sizeof(struct ipt_set_info_target)), |
Jan Engelhardt | 1d5b63d | 2007-10-04 16:29:00 +0000 | [diff] [blame] | 155 | .help = SET_help, |
| 156 | .init = SET_init, |
| 157 | .parse = SET_parse, |
| 158 | .final_check = SET_check, |
| 159 | .print = SET_print, |
| 160 | .save = SET_save, |
| 161 | .extra_opts = SET_opts, |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 162 | }; |
| 163 | |
| 164 | void _init(void) |
| 165 | { |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 166 | xtables_register_target(&set_tg_reg); |
Joszef Kadlecsik | 9c50ebe | 2004-02-09 13:47:01 +0000 | [diff] [blame] | 167 | } |