Harald Welte | daa1ef3 | 2005-07-19 21:44:58 +0000 | [diff] [blame] | 1 | /* Shared library add-on to ip666666tables 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> |
| 9 | #include <string.h> |
| 10 | #include <stdlib.h> |
| 11 | #include <getopt.h> |
| 12 | |
| 13 | #include <ip6tables.h> |
| 14 | #include <linux/netfilter_ipv6/ip6_tables.h> |
| 15 | #include <linux/netfilter_ipv4/ipt_NFQUEUE.h> |
| 16 | |
| 17 | static void init(struct ip6t_entry_target *t, unsigned int *nfcache) |
| 18 | { |
| 19 | } |
| 20 | |
| 21 | static void help(void) |
| 22 | { |
| 23 | printf( |
| 24 | "NFQUEUE target options\n" |
| 25 | " --queue-num value Send packet to QUEUE number <value>.\n" |
| 26 | " Valid queue numbers are 0-65535\n" |
| 27 | ); |
| 28 | } |
| 29 | |
| 30 | static struct option opts[] = { |
| 31 | { "queue-num", 1, 0, 'F' }, |
| 32 | { 0 } |
| 33 | }; |
| 34 | |
| 35 | static void |
| 36 | parse_num(const char *s, struct ipt_NFQ_info *tinfo) |
| 37 | { |
| 38 | unsigned int num; |
| 39 | |
| 40 | if (string_to_number(s, 0, 65535, &num) == -1) |
| 41 | exit_error(PARAMETER_PROBLEM, |
| 42 | "Invalid queue number `%s'\n", s); |
| 43 | |
| 44 | tinfo->queuenum = num & 0xffff; |
| 45 | return; |
| 46 | } |
| 47 | |
| 48 | static int |
| 49 | parse(int c, char **argv, int invert, unsigned int *flags, |
| 50 | const struct ip6t_entry *entry, |
| 51 | struct ip6t_entry_target **target) |
| 52 | { |
| 53 | struct ipt_NFQ_info *tinfo |
| 54 | = (struct ipt_NFQ_info *)(*target)->data; |
| 55 | |
| 56 | switch (c) { |
| 57 | case 'F': |
| 58 | if (*flags) |
| 59 | exit_error(PARAMETER_PROBLEM, "NFQUEUE target: " |
| 60 | "Only use --queue-num ONCE!"); |
| 61 | parse_num(optarg, tinfo); |
Harald Welte | ae87b8a | 2005-08-05 18:36:49 +0000 | [diff] [blame] | 62 | break; |
Harald Welte | daa1ef3 | 2005-07-19 21:44:58 +0000 | [diff] [blame] | 63 | default: |
| 64 | return 0; |
| 65 | } |
| 66 | |
| 67 | return 1; |
| 68 | } |
| 69 | |
| 70 | static void |
| 71 | final_check(unsigned int flags) |
| 72 | { |
| 73 | } |
| 74 | |
| 75 | /* Prints out the targinfo. */ |
| 76 | static void |
| 77 | print(const struct ip6t_ip6 *ip, |
| 78 | const struct ip6t_entry_target *target, |
| 79 | int numeric) |
| 80 | { |
| 81 | const struct ipt_NFQ_info *tinfo = |
| 82 | (const struct ipt_NFQ_info *)target->data; |
| 83 | printf("NFQUEUE num %u", tinfo->queuenum); |
| 84 | } |
| 85 | |
| 86 | /* Saves the union ip6t_targinfo in parsable form to stdout. */ |
| 87 | static void |
| 88 | save(const struct ip6t_ip6 *ip, const struct ip6t_entry_target *target) |
| 89 | { |
| 90 | const struct ipt_NFQ_info *tinfo = |
| 91 | (const struct ipt_NFQ_info *)target->data; |
| 92 | |
| 93 | printf("--queue-num %u ", tinfo->queuenum); |
| 94 | } |
| 95 | |
| 96 | static struct ip6tables_target nfqueue = { |
| 97 | .next = NULL, |
| 98 | .name = "NFQUEUE", |
| 99 | .version = IPTABLES_VERSION, |
| 100 | .size = IP6T_ALIGN(sizeof(struct ipt_NFQ_info)), |
| 101 | .userspacesize = IP6T_ALIGN(sizeof(struct ipt_NFQ_info)), |
| 102 | .help = &help, |
| 103 | .init = &init, |
| 104 | .parse = &parse, |
| 105 | .final_check = &final_check, |
| 106 | .print = &print, |
| 107 | .save = &save, |
| 108 | .extra_opts = opts |
| 109 | }; |
| 110 | |
| 111 | void _init(void) |
| 112 | { |
| 113 | register_target6(&nfqueue); |
| 114 | } |