Harald Welte | daa1ef3 | 2005-07-19 21:44:58 +0000 | [diff] [blame] | 1 | /* Shared library add-on to iptables for NFQ |
| 2 | * |
| 3 | * (C) 2005 by Harald Welte <laforge@netfilter.org> |
| 4 | * |
| 5 | * This program is distributed under the terms of GNU GPL v2, 1991 |
| 6 | * |
| 7 | */ |
| 8 | #include <stdio.h> |
Yasuyuki KOZAKAI | a2e89cc | 2007-07-24 07:29:36 +0000 | [diff] [blame] | 9 | #include <xtables.h> |
Yasuyuki KOZAKAI | a2e89cc | 2007-07-24 07:29:36 +0000 | [diff] [blame] | 10 | #include <linux/netfilter/xt_NFQUEUE.h> |
Harald Welte | daa1ef3 | 2005-07-19 21:44:58 +0000 | [diff] [blame] | 11 | |
Jan Engelhardt | 478be25 | 2011-03-06 17:54:50 +0100 | [diff] [blame] | 12 | enum { |
| 13 | O_QUEUE_NUM = 0, |
| 14 | O_QUEUE_BALANCE, |
| 15 | O_QUEUE_BYPASS, |
| 16 | }; |
| 17 | |
Jan Engelhardt | 932e648 | 2007-10-04 16:27:30 +0000 | [diff] [blame] | 18 | static void NFQUEUE_help(void) |
Harald Welte | daa1ef3 | 2005-07-19 21:44:58 +0000 | [diff] [blame] | 19 | { |
| 20 | printf( |
| 21 | "NFQUEUE target options\n" |
| 22 | " --queue-num value Send packet to QUEUE number <value>.\n" |
| 23 | " Valid queue numbers are 0-65535\n" |
| 24 | ); |
| 25 | } |
| 26 | |
Florian Westphal | 4282d89 | 2009-08-20 16:39:05 +0200 | [diff] [blame] | 27 | static void NFQUEUE_help_v1(void) |
| 28 | { |
| 29 | NFQUEUE_help(); |
| 30 | printf( |
| 31 | " --queue-balance first:last Balance flows between queues <value> to <value>.\n"); |
| 32 | } |
| 33 | |
Florian Westphal | 6924b49 | 2011-01-20 11:27:42 +0100 | [diff] [blame] | 34 | static void NFQUEUE_help_v2(void) |
| 35 | { |
| 36 | NFQUEUE_help_v1(); |
| 37 | printf( |
| 38 | " --queue-bypass Bypass Queueing if no queue instance exists.\n"); |
| 39 | } |
| 40 | |
Jan Engelhardt | 478be25 | 2011-03-06 17:54:50 +0100 | [diff] [blame] | 41 | #define s struct xt_NFQ_info |
| 42 | static const struct xt_option_entry NFQUEUE_opts[] = { |
| 43 | {.name = "queue-num", .id = O_QUEUE_NUM, .type = XTTYPE_UINT16, |
| 44 | .flags = XTOPT_PUT, XTOPT_POINTER(s, queuenum)}, |
| 45 | {.name = "queue-balance", .id = O_QUEUE_BALANCE, |
| 46 | .type = XTTYPE_UINT16RC}, |
| 47 | {.name = "queue-bypass", .id = O_QUEUE_BYPASS, .type = XTTYPE_NONE}, |
| 48 | XTOPT_TABLEEND, |
Harald Welte | daa1ef3 | 2005-07-19 21:44:58 +0000 | [diff] [blame] | 49 | }; |
Jan Engelhardt | 478be25 | 2011-03-06 17:54:50 +0100 | [diff] [blame] | 50 | #undef s |
Harald Welte | daa1ef3 | 2005-07-19 21:44:58 +0000 | [diff] [blame] | 51 | |
Jan Engelhardt | 478be25 | 2011-03-06 17:54:50 +0100 | [diff] [blame] | 52 | static void NFQUEUE_parse(struct xt_option_call *cb) |
Florian Westphal | 4282d89 | 2009-08-20 16:39:05 +0200 | [diff] [blame] | 53 | { |
Jan Engelhardt | 478be25 | 2011-03-06 17:54:50 +0100 | [diff] [blame] | 54 | xtables_option_parse(cb); |
| 55 | if (cb->entry->id == O_QUEUE_BALANCE) |
Florian Westphal | 4282d89 | 2009-08-20 16:39:05 +0200 | [diff] [blame] | 56 | xtables_error(PARAMETER_PROBLEM, "NFQUEUE target: " |
| 57 | "--queue-balance not supported (kernel too old?)"); |
Florian Westphal | 4282d89 | 2009-08-20 16:39:05 +0200 | [diff] [blame] | 58 | } |
| 59 | |
Jan Engelhardt | 478be25 | 2011-03-06 17:54:50 +0100 | [diff] [blame] | 60 | static void NFQUEUE_parse_v1(struct xt_option_call *cb) |
Florian Westphal | 4282d89 | 2009-08-20 16:39:05 +0200 | [diff] [blame] | 61 | { |
Jan Engelhardt | 478be25 | 2011-03-06 17:54:50 +0100 | [diff] [blame] | 62 | struct xt_NFQ_info_v1 *info = cb->data; |
| 63 | const uint16_t *r = cb->val.u16_range; |
Florian Westphal | 4282d89 | 2009-08-20 16:39:05 +0200 | [diff] [blame] | 64 | |
Jan Engelhardt | 478be25 | 2011-03-06 17:54:50 +0100 | [diff] [blame] | 65 | xtables_option_parse(cb); |
| 66 | switch (cb->entry->id) { |
| 67 | case O_QUEUE_BALANCE: |
| 68 | if (cb->nvals != 2) |
| 69 | xtables_error(PARAMETER_PROBLEM, |
| 70 | "Bad range \"%s\"", cb->arg); |
| 71 | if (r[0] >= r[1]) |
Florian Westphal | 4282d89 | 2009-08-20 16:39:05 +0200 | [diff] [blame] | 72 | xtables_error(PARAMETER_PROBLEM, "%u should be less than %u", |
Jan Engelhardt | 478be25 | 2011-03-06 17:54:50 +0100 | [diff] [blame] | 73 | r[0], r[1]); |
| 74 | info->queuenum = r[0]; |
| 75 | info->queues_total = r[1] - r[0] + 1; |
Florian Westphal | 4282d89 | 2009-08-20 16:39:05 +0200 | [diff] [blame] | 76 | break; |
Harald Welte | daa1ef3 | 2005-07-19 21:44:58 +0000 | [diff] [blame] | 77 | } |
Harald Welte | daa1ef3 | 2005-07-19 21:44:58 +0000 | [diff] [blame] | 78 | } |
| 79 | |
Jan Engelhardt | 478be25 | 2011-03-06 17:54:50 +0100 | [diff] [blame] | 80 | static void NFQUEUE_parse_v2(struct xt_option_call *cb) |
Florian Westphal | 6924b49 | 2011-01-20 11:27:42 +0100 | [diff] [blame] | 81 | { |
Jan Engelhardt | 478be25 | 2011-03-06 17:54:50 +0100 | [diff] [blame] | 82 | struct xt_NFQ_info_v2 *info = cb->data; |
| 83 | |
| 84 | xtables_option_parse(cb); |
| 85 | switch (cb->entry->id) { |
| 86 | case O_QUEUE_BYPASS: |
Florian Westphal | 6924b49 | 2011-01-20 11:27:42 +0100 | [diff] [blame] | 87 | info->bypass = 1; |
Jan Engelhardt | 478be25 | 2011-03-06 17:54:50 +0100 | [diff] [blame] | 88 | break; |
| 89 | default: |
| 90 | NFQUEUE_parse_v1(cb); |
| 91 | break; |
Florian Westphal | 6924b49 | 2011-01-20 11:27:42 +0100 | [diff] [blame] | 92 | } |
Florian Westphal | 6924b49 | 2011-01-20 11:27:42 +0100 | [diff] [blame] | 93 | } |
| 94 | |
Jan Engelhardt | 932e648 | 2007-10-04 16:27:30 +0000 | [diff] [blame] | 95 | static void NFQUEUE_print(const void *ip, |
| 96 | const struct xt_entry_target *target, int numeric) |
Harald Welte | daa1ef3 | 2005-07-19 21:44:58 +0000 | [diff] [blame] | 97 | { |
Yasuyuki KOZAKAI | a2e89cc | 2007-07-24 07:29:36 +0000 | [diff] [blame] | 98 | const struct xt_NFQ_info *tinfo = |
| 99 | (const struct xt_NFQ_info *)target->data; |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 100 | printf(" NFQUEUE num %u", tinfo->queuenum); |
Harald Welte | daa1ef3 | 2005-07-19 21:44:58 +0000 | [diff] [blame] | 101 | } |
| 102 | |
Florian Westphal | 4282d89 | 2009-08-20 16:39:05 +0200 | [diff] [blame] | 103 | static void NFQUEUE_print_v1(const void *ip, |
| 104 | const struct xt_entry_target *target, int numeric) |
| 105 | { |
| 106 | const struct xt_NFQ_info_v1 *tinfo = (const void *)target->data; |
| 107 | unsigned int last = tinfo->queues_total; |
| 108 | |
| 109 | if (last > 1) { |
| 110 | last += tinfo->queuenum - 1; |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 111 | printf(" NFQUEUE balance %u:%u", tinfo->queuenum, last); |
Florian Westphal | 4282d89 | 2009-08-20 16:39:05 +0200 | [diff] [blame] | 112 | } else { |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 113 | printf(" NFQUEUE num %u", tinfo->queuenum); |
Florian Westphal | 4282d89 | 2009-08-20 16:39:05 +0200 | [diff] [blame] | 114 | } |
| 115 | } |
| 116 | |
Florian Westphal | 6924b49 | 2011-01-20 11:27:42 +0100 | [diff] [blame] | 117 | static void NFQUEUE_print_v2(const void *ip, |
| 118 | const struct xt_entry_target *target, int numeric) |
| 119 | { |
| 120 | const struct xt_NFQ_info_v2 *info = (void *) target->data; |
| 121 | |
| 122 | NFQUEUE_print_v1(ip, target, numeric); |
| 123 | if (info->bypass) |
| 124 | printf(" bypass"); |
| 125 | } |
| 126 | |
Jan Engelhardt | 932e648 | 2007-10-04 16:27:30 +0000 | [diff] [blame] | 127 | static void NFQUEUE_save(const void *ip, const struct xt_entry_target *target) |
Harald Welte | daa1ef3 | 2005-07-19 21:44:58 +0000 | [diff] [blame] | 128 | { |
Yasuyuki KOZAKAI | a2e89cc | 2007-07-24 07:29:36 +0000 | [diff] [blame] | 129 | const struct xt_NFQ_info *tinfo = |
| 130 | (const struct xt_NFQ_info *)target->data; |
Harald Welte | daa1ef3 | 2005-07-19 21:44:58 +0000 | [diff] [blame] | 131 | |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 132 | printf(" --queue-num %u", tinfo->queuenum); |
Harald Welte | daa1ef3 | 2005-07-19 21:44:58 +0000 | [diff] [blame] | 133 | } |
| 134 | |
Florian Westphal | 4282d89 | 2009-08-20 16:39:05 +0200 | [diff] [blame] | 135 | static void NFQUEUE_save_v1(const void *ip, const struct xt_entry_target *target) |
| 136 | { |
| 137 | const struct xt_NFQ_info_v1 *tinfo = (const void *)target->data; |
| 138 | unsigned int last = tinfo->queues_total; |
| 139 | |
| 140 | if (last > 1) { |
| 141 | last += tinfo->queuenum - 1; |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 142 | printf(" --queue-balance %u:%u", tinfo->queuenum, last); |
Florian Westphal | 4282d89 | 2009-08-20 16:39:05 +0200 | [diff] [blame] | 143 | } else { |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 144 | printf(" --queue-num %u", tinfo->queuenum); |
Florian Westphal | 4282d89 | 2009-08-20 16:39:05 +0200 | [diff] [blame] | 145 | } |
| 146 | } |
| 147 | |
Florian Westphal | 6924b49 | 2011-01-20 11:27:42 +0100 | [diff] [blame] | 148 | static void NFQUEUE_save_v2(const void *ip, const struct xt_entry_target *target) |
| 149 | { |
| 150 | const struct xt_NFQ_info_v2 *info = (void *) target->data; |
| 151 | |
| 152 | NFQUEUE_save_v1(ip, target); |
| 153 | |
| 154 | if (info->bypass) |
| 155 | printf("--queue-bypass "); |
| 156 | } |
| 157 | |
Florian Westphal | 4282d89 | 2009-08-20 16:39:05 +0200 | [diff] [blame] | 158 | static void NFQUEUE_init_v1(struct xt_entry_target *t) |
| 159 | { |
| 160 | struct xt_NFQ_info_v1 *tinfo = (void *)t->data; |
| 161 | tinfo->queues_total = 1; |
| 162 | } |
| 163 | |
Florian Westphal | 6924b49 | 2011-01-20 11:27:42 +0100 | [diff] [blame] | 164 | static struct xtables_target nfqueue_targets[] = { |
| 165 | { |
Jan Engelhardt | c5e8573 | 2009-06-12 20:55:44 +0200 | [diff] [blame] | 166 | .family = NFPROTO_UNSPEC, |
Harald Welte | daa1ef3 | 2005-07-19 21:44:58 +0000 | [diff] [blame] | 167 | .name = "NFQUEUE", |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 168 | .version = XTABLES_VERSION, |
Yasuyuki KOZAKAI | a2e89cc | 2007-07-24 07:29:36 +0000 | [diff] [blame] | 169 | .size = XT_ALIGN(sizeof(struct xt_NFQ_info)), |
| 170 | .userspacesize = XT_ALIGN(sizeof(struct xt_NFQ_info)), |
Jan Engelhardt | 932e648 | 2007-10-04 16:27:30 +0000 | [diff] [blame] | 171 | .help = NFQUEUE_help, |
Jan Engelhardt | 932e648 | 2007-10-04 16:27:30 +0000 | [diff] [blame] | 172 | .print = NFQUEUE_print, |
| 173 | .save = NFQUEUE_save, |
Jan Engelhardt | 478be25 | 2011-03-06 17:54:50 +0100 | [diff] [blame] | 174 | .x6_parse = NFQUEUE_parse, |
| 175 | .x6_options = NFQUEUE_opts |
Florian Westphal | 6924b49 | 2011-01-20 11:27:42 +0100 | [diff] [blame] | 176 | },{ |
Florian Westphal | 4282d89 | 2009-08-20 16:39:05 +0200 | [diff] [blame] | 177 | .family = NFPROTO_UNSPEC, |
| 178 | .revision = 1, |
| 179 | .name = "NFQUEUE", |
| 180 | .version = XTABLES_VERSION, |
| 181 | .size = XT_ALIGN(sizeof(struct xt_NFQ_info_v1)), |
| 182 | .userspacesize = XT_ALIGN(sizeof(struct xt_NFQ_info_v1)), |
| 183 | .help = NFQUEUE_help_v1, |
| 184 | .init = NFQUEUE_init_v1, |
Florian Westphal | 4282d89 | 2009-08-20 16:39:05 +0200 | [diff] [blame] | 185 | .print = NFQUEUE_print_v1, |
| 186 | .save = NFQUEUE_save_v1, |
Jan Engelhardt | 478be25 | 2011-03-06 17:54:50 +0100 | [diff] [blame] | 187 | .x6_parse = NFQUEUE_parse_v1, |
| 188 | .x6_options = NFQUEUE_opts, |
Florian Westphal | 6924b49 | 2011-01-20 11:27:42 +0100 | [diff] [blame] | 189 | },{ |
| 190 | .family = NFPROTO_UNSPEC, |
| 191 | .revision = 2, |
| 192 | .name = "NFQUEUE", |
| 193 | .version = XTABLES_VERSION, |
| 194 | .size = XT_ALIGN(sizeof(struct xt_NFQ_info_v2)), |
| 195 | .userspacesize = XT_ALIGN(sizeof(struct xt_NFQ_info_v2)), |
| 196 | .help = NFQUEUE_help_v2, |
| 197 | .init = NFQUEUE_init_v1, |
Florian Westphal | 6924b49 | 2011-01-20 11:27:42 +0100 | [diff] [blame] | 198 | .print = NFQUEUE_print_v2, |
| 199 | .save = NFQUEUE_save_v2, |
Jan Engelhardt | 478be25 | 2011-03-06 17:54:50 +0100 | [diff] [blame] | 200 | .x6_parse = NFQUEUE_parse_v2, |
| 201 | .x6_options = NFQUEUE_opts, |
Florian Westphal | 6924b49 | 2011-01-20 11:27:42 +0100 | [diff] [blame] | 202 | } |
Florian Westphal | 4282d89 | 2009-08-20 16:39:05 +0200 | [diff] [blame] | 203 | }; |
| 204 | |
Harald Welte | daa1ef3 | 2005-07-19 21:44:58 +0000 | [diff] [blame] | 205 | void _init(void) |
| 206 | { |
Florian Westphal | 6924b49 | 2011-01-20 11:27:42 +0100 | [diff] [blame] | 207 | xtables_register_targets(nfqueue_targets, ARRAY_SIZE(nfqueue_targets)); |
Harald Welte | daa1ef3 | 2005-07-19 21:44:58 +0000 | [diff] [blame] | 208 | } |