| /* Shared library add-on to iptables to add MARK target support. */ |
| #include <stdio.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include <getopt.h> |
| |
| #include <ip6tables.h> |
| #include <linux/netfilter_ipv6/ip6_tables.h> |
| #include <linux/netfilter_ipv6/ip6t_MARK.h> |
| |
| /* Function which prints out usage message. */ |
| static void |
| help(void) |
| { |
| printf( |
| "MARK target v%s options:\n" |
| " --set-mark value Set nfmark value\n" |
| "\n", |
| IPTABLES_VERSION); |
| } |
| |
| static struct option opts[] = { |
| { .name = "set-mark", .has_arg = 1, .flag = 0, .val = '1' }, |
| { .name = 0 } |
| }; |
| |
| /* Initialize the target. */ |
| static void |
| init(struct ip6t_entry_target *t, unsigned int *nfcache) |
| { |
| } |
| |
| /* Function which parses command options; returns true if it |
| ate an option */ |
| static int |
| parse(int c, char **argv, int invert, unsigned int *flags, |
| const struct ip6t_entry *entry, |
| struct ip6t_entry_target **target) |
| { |
| struct ip6t_mark_target_info *markinfo |
| = (struct ip6t_mark_target_info *)(*target)->data; |
| |
| switch (c) { |
| char *end; |
| case '1': |
| markinfo->mark = strtoul(optarg, &end, 0); |
| if (*end != '\0' || end == optarg) |
| exit_error(PARAMETER_PROBLEM, "Bad MARK value `%s'", optarg); |
| if (*flags) |
| exit_error(PARAMETER_PROBLEM, |
| "MARK target: Can't specify --set-mark twice"); |
| *flags = 1; |
| break; |
| |
| default: |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| static void |
| final_check(unsigned int flags) |
| { |
| if (!flags) |
| exit_error(PARAMETER_PROBLEM, |
| "MARK target: Parameter --set-mark is required"); |
| } |
| |
| /* Prints out the targinfo. */ |
| static void |
| print(const struct ip6t_ip6 *ip, |
| const struct ip6t_entry_target *target, |
| int numeric) |
| { |
| const struct ip6t_mark_target_info *markinfo = |
| (const struct ip6t_mark_target_info *)target->data; |
| |
| printf("MARK set 0x%lx ", markinfo->mark); |
| } |
| |
| /* Saves the union ipt_targinfo in parsable form to stdout. */ |
| static void |
| save(const struct ip6t_ip6 *ip, const struct ip6t_entry_target *target) |
| { |
| const struct ip6t_mark_target_info *markinfo = |
| (const struct ip6t_mark_target_info *)target->data; |
| |
| printf("--set-mark 0x%lx ", markinfo->mark); |
| } |
| |
| static |
| struct ip6tables_target mark = { |
| .name = "MARK", |
| .version = IPTABLES_VERSION, |
| .size = IP6T_ALIGN(sizeof(struct ip6t_mark_target_info)), |
| .userspacesize = IP6T_ALIGN(sizeof(struct ip6t_mark_target_info)), |
| .help = &help, |
| .init = &init, |
| .parse = &parse, |
| .final_check = &final_check, |
| .print = &print, |
| .save = &save, |
| .extra_opts = opts |
| }; |
| |
| void _init(void) |
| { |
| register_target6(&mark); |
| } |