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/* Shared library add-on to iptables for the TTL target |
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* This program is distributed under the terms of GNU GPL |
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* (C) 2005 by Samir Bellabes <sbellabes@mandriva.com> |
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* $Id: libipt_IFWLOG.c 475942 2009-12-10 13:55:57Z eugeni $ |
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* |
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*/ |
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#include <stdio.h> |
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#include <string.h> |
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#include <stdlib.h> |
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#include <getopt.h> |
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#include <iptables.h> |
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|
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#include <linux/netfilter_ipv4/ip_tables.h> |
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#include <linux/netfilter_ipv4/ipt_IFWLOG.h> |
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|
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static void ifwlog_init(struct xt_entry_target *t) |
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{ |
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} |
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|
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static void ifwlog_help(void) |
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{ |
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printf( |
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"IFWLOG target option\n" |
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" --log-prefix prefix Prefix log messages with this prefix\n"); |
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} |
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|
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static struct option ifwlog_opts[] = { |
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{ .name = "log-prefix", .has_arg = 1, .flag = 0, .val = 'a' }, |
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{ .name = 0 } |
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}; |
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|
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#define IPT_IFWLOG_OPT_PREFIX 0x01 |
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|
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static int ifwlog_parse(int c, char **argv, int invert, unsigned int *flags, |
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const void *entry, struct xt_entry_target **target) |
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{ |
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struct ipt_IFWLOG_info *info = (struct ipt_IFWLOG_info *) (*target)->data; |
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|
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switch (c) { |
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case 'a': |
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if (*flags & IPT_IFWLOG_OPT_PREFIX) |
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xtables_error(PARAMETER_PROBLEM, |
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"Can't specify --log-prefix twice"); |
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|
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if (xtables_check_inverse(optarg, &invert, NULL, 0, argv)) |
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xtables_error(PARAMETER_PROBLEM, |
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"Unexpected '!' after --log-prefix "); |
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|
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if (strlen(optarg) > sizeof(info->prefix) - 1) |
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xtables_error(PARAMETER_PROBLEM, |
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"Maximum prefix length %d for --log-prefix", |
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(unsigned int)sizeof(info->prefix) - 1); |
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|
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if (strlen(optarg) != strlen(strtok(optarg,"\n"))) |
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xtables_error(PARAMETER_PROBLEM, |
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"New lines are not allowed in --log-prefix"); |
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|
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strcpy(info->prefix, optarg); |
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*flags |= IPT_IFWLOG_OPT_PREFIX; |
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break; |
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default: |
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return 0; |
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} |
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|
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return 1; |
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} |
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|
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static void ifwlog_save(const void *ip, const struct xt_entry_target *target) |
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{ |
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const struct ipt_IFWLOG_info *info = |
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(struct ipt_IFWLOG_info *) target->data; |
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|
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if (strcmp(info->prefix, "") != 0) |
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printf("--log-prefix \"%s\"", info->prefix); |
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} |
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|
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static void ifwlog_print(const void *ip, const struct xt_entry_target *target, |
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int numeric) |
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{ |
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const struct ipt_IFWLOG_info *info = |
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(struct ipt_IFWLOG_info *) target->data; |
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|
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printf("IFWLOG "); |
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if (strcmp(info->prefix, "") !=0) |
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printf("prefix '%s' ", info->prefix); |
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|
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} |
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|
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static struct xtables_target IFWLOG_tg_reg = { |
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.name = "IFWLOG", |
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.version = XTABLES_VERSION, |
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.size = XT_ALIGN(sizeof(struct ipt_IFWLOG_info)), |
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.userspacesize = XT_ALIGN(sizeof(struct ipt_IFWLOG_info)), |
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.help = &ifwlog_help, |
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.init = &ifwlog_init, |
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.parse = &ifwlog_parse, |
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.print = &ifwlog_print, |
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.save = &ifwlog_save, |
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.extra_opts = ifwlog_opts, |
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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_target(&IFWLOG_tg_reg); |
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} |
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