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401 lines
11 KiB
401 lines
11 KiB
/* Shared library add-on to iptables for NFQ |
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* |
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* (C) 2005 by Harald Welte <laforge@netfilter.org> |
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* |
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* This program is distributed under the terms of GNU GPL v2, 1991 |
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* |
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*/ |
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#include <stdio.h> |
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#include <xtables.h> |
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#include <linux/netfilter/xt_NFQUEUE.h> |
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enum { |
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O_QUEUE_NUM = 0, |
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O_QUEUE_BALANCE, |
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O_QUEUE_BYPASS, |
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O_QUEUE_CPU_FANOUT, |
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F_QUEUE_NUM = 1 << O_QUEUE_NUM, |
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F_QUEUE_BALANCE = 1 << O_QUEUE_BALANCE, |
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F_QUEUE_CPU_FANOUT = 1 << O_QUEUE_CPU_FANOUT, |
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}; |
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static void NFQUEUE_help(void) |
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{ |
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printf( |
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"NFQUEUE target options\n" |
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" --queue-num value Send packet to QUEUE number <value>.\n" |
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" Valid queue numbers are 0-65535\n" |
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); |
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} |
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static void NFQUEUE_help_v1(void) |
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{ |
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printf( |
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"NFQUEUE target options\n" |
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" --queue-num value Send packet to QUEUE number <value>.\n" |
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" Valid queue numbers are 0-65535\n" |
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" --queue-balance first:last Balance flows between queues <value> to <value>.\n"); |
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} |
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static void NFQUEUE_help_v2(void) |
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{ |
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printf( |
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"NFQUEUE target options\n" |
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" --queue-num value Send packet to QUEUE number <value>.\n" |
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" Valid queue numbers are 0-65535\n" |
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" --queue-balance first:last Balance flows between queues <value> to <value>.\n" |
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" --queue-bypass Bypass Queueing if no queue instance exists.\n" |
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" --queue-cpu-fanout Use current CPU (no hashing)\n"); |
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} |
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static void NFQUEUE_help_v3(void) |
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{ |
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printf( |
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"NFQUEUE target options\n" |
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" --queue-num value Send packet to QUEUE number <value>.\n" |
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" Valid queue numbers are 0-65535\n" |
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" --queue-balance first:last Balance flows between queues <value> to <value>.\n" |
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" --queue-bypass Bypass Queueing if no queue instance exists.\n" |
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" --queue-cpu-fanout Use current CPU (no hashing)\n"); |
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} |
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#define s struct xt_NFQ_info |
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static const struct xt_option_entry NFQUEUE_opts[] = { |
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{.name = "queue-num", .id = O_QUEUE_NUM, .type = XTTYPE_UINT16, |
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.flags = XTOPT_PUT, XTOPT_POINTER(s, queuenum), |
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.excl = F_QUEUE_BALANCE}, |
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{.name = "queue-balance", .id = O_QUEUE_BALANCE, |
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.type = XTTYPE_UINT16RC, .excl = F_QUEUE_NUM}, |
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{.name = "queue-bypass", .id = O_QUEUE_BYPASS, .type = XTTYPE_NONE}, |
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{.name = "queue-cpu-fanout", .id = O_QUEUE_CPU_FANOUT, |
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.type = XTTYPE_NONE, .also = F_QUEUE_BALANCE}, |
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XTOPT_TABLEEND, |
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}; |
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#undef s |
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static void NFQUEUE_parse(struct xt_option_call *cb) |
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{ |
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xtables_option_parse(cb); |
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if (cb->entry->id == O_QUEUE_BALANCE) |
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xtables_error(PARAMETER_PROBLEM, "NFQUEUE target: " |
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"--queue-balance not supported (kernel too old?)"); |
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} |
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static void NFQUEUE_parse_v1(struct xt_option_call *cb) |
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{ |
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struct xt_NFQ_info_v1 *info = cb->data; |
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const uint16_t *r = cb->val.u16_range; |
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xtables_option_parse(cb); |
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switch (cb->entry->id) { |
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case O_QUEUE_BALANCE: |
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if (cb->nvals != 2) |
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xtables_error(PARAMETER_PROBLEM, |
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"Bad range \"%s\"", cb->arg); |
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if (r[0] >= r[1]) |
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xtables_error(PARAMETER_PROBLEM, "%u should be less than %u", |
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r[0], r[1]); |
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info->queuenum = r[0]; |
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info->queues_total = r[1] - r[0] + 1; |
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break; |
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} |
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} |
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static void NFQUEUE_parse_v2(struct xt_option_call *cb) |
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{ |
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struct xt_NFQ_info_v2 *info = cb->data; |
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const uint16_t *r = cb->val.u16_range; |
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xtables_option_parse(cb); |
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switch (cb->entry->id) { |
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case O_QUEUE_BALANCE: |
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if (cb->nvals != 2) |
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xtables_error(PARAMETER_PROBLEM, |
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"Bad range \"%s\"", cb->arg); |
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if (r[0] >= r[1]) |
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xtables_error(PARAMETER_PROBLEM, |
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"%u should be less than %u", |
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r[0], r[1]); |
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info->queuenum = r[0]; |
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info->queues_total = r[1] - r[0] + 1; |
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break; |
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case O_QUEUE_BYPASS: |
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info->bypass |= NFQ_FLAG_BYPASS; |
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break; |
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} |
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} |
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static void NFQUEUE_parse_v3(struct xt_option_call *cb) |
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{ |
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struct xt_NFQ_info_v3 *info = cb->data; |
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const uint16_t *r = cb->val.u16_range; |
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xtables_option_parse(cb); |
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switch (cb->entry->id) { |
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case O_QUEUE_BALANCE: |
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if (cb->nvals != 2) |
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xtables_error(PARAMETER_PROBLEM, |
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"Bad range \"%s\"", cb->arg); |
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if (r[0] >= r[1]) |
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xtables_error(PARAMETER_PROBLEM, |
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"%u should be less than %u", |
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r[0], r[1]); |
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info->queuenum = r[0]; |
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info->queues_total = r[1] - r[0] + 1; |
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break; |
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case O_QUEUE_BYPASS: |
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info->flags |= NFQ_FLAG_BYPASS; |
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break; |
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case O_QUEUE_CPU_FANOUT: |
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info->flags |= NFQ_FLAG_CPU_FANOUT; |
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break; |
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} |
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} |
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static void NFQUEUE_print(const void *ip, |
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const struct xt_entry_target *target, int numeric) |
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{ |
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const struct xt_NFQ_info *tinfo = |
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(const struct xt_NFQ_info *)target->data; |
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printf(" NFQUEUE num %u", tinfo->queuenum); |
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} |
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static void NFQUEUE_print_v1(const void *ip, |
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const struct xt_entry_target *target, int numeric) |
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{ |
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const struct xt_NFQ_info_v1 *tinfo = (const void *)target->data; |
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unsigned int last = tinfo->queues_total; |
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if (last > 1) { |
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last += tinfo->queuenum - 1; |
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printf(" NFQUEUE balance %u:%u", tinfo->queuenum, last); |
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} else { |
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printf(" NFQUEUE num %u", tinfo->queuenum); |
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} |
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} |
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static void NFQUEUE_print_v2(const void *ip, |
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const struct xt_entry_target *target, int numeric) |
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{ |
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const struct xt_NFQ_info_v2 *info = (void *) target->data; |
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unsigned int last = info->queues_total; |
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if (last > 1) { |
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last += info->queuenum - 1; |
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printf(" NFQUEUE balance %u:%u", info->queuenum, last); |
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} else |
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printf(" NFQUEUE num %u", info->queuenum); |
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if (info->bypass & NFQ_FLAG_BYPASS) |
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printf(" bypass"); |
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} |
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static void NFQUEUE_print_v3(const void *ip, |
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const struct xt_entry_target *target, int numeric) |
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{ |
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const struct xt_NFQ_info_v3 *info = (void *)target->data; |
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unsigned int last = info->queues_total; |
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if (last > 1) { |
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last += info->queuenum - 1; |
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printf(" NFQUEUE balance %u:%u", info->queuenum, last); |
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} else |
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printf(" NFQUEUE num %u", info->queuenum); |
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if (info->flags & NFQ_FLAG_BYPASS) |
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printf(" bypass"); |
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if (info->flags & NFQ_FLAG_CPU_FANOUT) |
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printf(" cpu-fanout"); |
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} |
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static void NFQUEUE_save(const void *ip, const struct xt_entry_target *target) |
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{ |
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const struct xt_NFQ_info *tinfo = |
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(const struct xt_NFQ_info *)target->data; |
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printf(" --queue-num %u", tinfo->queuenum); |
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} |
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static void NFQUEUE_save_v1(const void *ip, const struct xt_entry_target *target) |
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{ |
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const struct xt_NFQ_info_v1 *tinfo = (const void *)target->data; |
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unsigned int last = tinfo->queues_total; |
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if (last > 1) { |
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last += tinfo->queuenum - 1; |
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printf(" --queue-balance %u:%u", tinfo->queuenum, last); |
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} else { |
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printf(" --queue-num %u", tinfo->queuenum); |
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} |
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} |
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static void NFQUEUE_save_v2(const void *ip, const struct xt_entry_target *target) |
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{ |
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const struct xt_NFQ_info_v2 *info = (void *) target->data; |
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unsigned int last = info->queues_total; |
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if (last > 1) { |
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last += info->queuenum - 1; |
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printf(" --queue-balance %u:%u", info->queuenum, last); |
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} else |
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printf(" --queue-num %u", info->queuenum); |
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if (info->bypass & NFQ_FLAG_BYPASS) |
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printf(" --queue-bypass"); |
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} |
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static void NFQUEUE_save_v3(const void *ip, |
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const struct xt_entry_target *target) |
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{ |
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const struct xt_NFQ_info_v3 *info = (void *)target->data; |
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unsigned int last = info->queues_total; |
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if (last > 1) { |
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last += info->queuenum - 1; |
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printf(" --queue-balance %u:%u", info->queuenum, last); |
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} else |
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printf(" --queue-num %u", info->queuenum); |
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if (info->flags & NFQ_FLAG_BYPASS) |
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printf(" --queue-bypass"); |
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if (info->flags & NFQ_FLAG_CPU_FANOUT) |
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printf(" --queue-cpu-fanout"); |
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} |
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static void NFQUEUE_init_v1(struct xt_entry_target *t) |
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{ |
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struct xt_NFQ_info_v1 *tinfo = (void *)t->data; |
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tinfo->queues_total = 1; |
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} |
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static int NFQUEUE_xlate(struct xt_xlate *xl, |
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const struct xt_xlate_tg_params *params) |
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{ |
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const struct xt_NFQ_info *tinfo = |
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(const struct xt_NFQ_info *)params->target->data; |
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xt_xlate_add(xl, "queue num %u ", tinfo->queuenum); |
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return 1; |
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} |
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static int NFQUEUE_xlate_v1(struct xt_xlate *xl, |
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const struct xt_xlate_tg_params *params) |
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{ |
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const struct xt_NFQ_info_v1 *tinfo = (const void *)params->target->data; |
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unsigned int last = tinfo->queues_total; |
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if (last > 1) { |
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last += tinfo->queuenum - 1; |
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xt_xlate_add(xl, "queue num %u-%u ", tinfo->queuenum, last); |
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} else { |
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xt_xlate_add(xl, "queue num %u ", tinfo->queuenum); |
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} |
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return 1; |
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} |
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static int NFQUEUE_xlate_v2(struct xt_xlate *xl, |
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const struct xt_xlate_tg_params *params) |
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{ |
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const struct xt_NFQ_info_v2 *info = (void *)params->target->data; |
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unsigned int last = info->queues_total; |
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if (last > 1) { |
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last += info->queuenum - 1; |
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xt_xlate_add(xl, "queue num %u-%u ", info->queuenum, last); |
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} else |
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xt_xlate_add(xl, "queue num %u ", info->queuenum); |
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if (info->bypass & NFQ_FLAG_BYPASS) |
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xt_xlate_add(xl, "bypass"); |
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return 1; |
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} |
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static int NFQUEUE_xlate_v3(struct xt_xlate *xl, |
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const struct xt_xlate_tg_params *params) |
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{ |
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const struct xt_NFQ_info_v3 *info = (void *)params->target->data; |
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unsigned int last = info->queues_total; |
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if (last > 1) { |
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last += info->queuenum - 1; |
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xt_xlate_add(xl, "queue num %u-%u ", info->queuenum, last); |
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} else |
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xt_xlate_add(xl, "queue num %u ", info->queuenum); |
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if (info->flags & NFQ_FLAG_BYPASS) |
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xt_xlate_add(xl, "bypass"); |
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if (info->flags & NFQ_FLAG_CPU_FANOUT) |
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xt_xlate_add(xl, "%sfanout ", |
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info->flags & NFQ_FLAG_BYPASS ? "," : ""); |
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return 1; |
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} |
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static struct xtables_target nfqueue_targets[] = { |
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{ |
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.family = NFPROTO_UNSPEC, |
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.name = "NFQUEUE", |
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.version = XTABLES_VERSION, |
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.size = XT_ALIGN(sizeof(struct xt_NFQ_info)), |
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.userspacesize = XT_ALIGN(sizeof(struct xt_NFQ_info)), |
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.help = NFQUEUE_help, |
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.print = NFQUEUE_print, |
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.save = NFQUEUE_save, |
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.x6_parse = NFQUEUE_parse, |
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.x6_options = NFQUEUE_opts, |
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.xlate = NFQUEUE_xlate, |
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},{ |
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.family = NFPROTO_UNSPEC, |
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.revision = 1, |
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.name = "NFQUEUE", |
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.version = XTABLES_VERSION, |
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.size = XT_ALIGN(sizeof(struct xt_NFQ_info_v1)), |
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.userspacesize = XT_ALIGN(sizeof(struct xt_NFQ_info_v1)), |
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.help = NFQUEUE_help_v1, |
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.init = NFQUEUE_init_v1, |
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.print = NFQUEUE_print_v1, |
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.save = NFQUEUE_save_v1, |
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.x6_parse = NFQUEUE_parse_v1, |
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.x6_options = NFQUEUE_opts, |
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.xlate = NFQUEUE_xlate_v1, |
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},{ |
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.family = NFPROTO_UNSPEC, |
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.revision = 2, |
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.name = "NFQUEUE", |
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.version = XTABLES_VERSION, |
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.size = XT_ALIGN(sizeof(struct xt_NFQ_info_v2)), |
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.userspacesize = XT_ALIGN(sizeof(struct xt_NFQ_info_v2)), |
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.help = NFQUEUE_help_v2, |
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.init = NFQUEUE_init_v1, |
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.print = NFQUEUE_print_v2, |
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.save = NFQUEUE_save_v2, |
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.x6_parse = NFQUEUE_parse_v2, |
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.x6_options = NFQUEUE_opts, |
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.xlate = NFQUEUE_xlate_v2, |
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},{ |
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.family = NFPROTO_UNSPEC, |
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.revision = 3, |
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.name = "NFQUEUE", |
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.version = XTABLES_VERSION, |
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.size = XT_ALIGN(sizeof(struct xt_NFQ_info_v3)), |
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.userspacesize = XT_ALIGN(sizeof(struct xt_NFQ_info_v3)), |
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.help = NFQUEUE_help_v3, |
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.init = NFQUEUE_init_v1, |
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.print = NFQUEUE_print_v3, |
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.save = NFQUEUE_save_v3, |
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.x6_parse = NFQUEUE_parse_v3, |
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.x6_options = NFQUEUE_opts, |
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.xlate = NFQUEUE_xlate_v3, |
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} |
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}; |
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void _init(void) |
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{ |
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xtables_register_targets(nfqueue_targets, ARRAY_SIZE(nfqueue_targets)); |
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}
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