Release 4.11 net/netfilter/xt_string.c
/* String matching match for iptables
*
* (C) 2005 Pablo Neira Ayuso <pablo@eurodev.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/gfp.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_string.h>
#include <linux/textsearch.h>
MODULE_AUTHOR("Pablo Neira Ayuso <pablo@eurodev.net>");
MODULE_DESCRIPTION("Xtables: string-based matching");
MODULE_LICENSE("GPL");
MODULE_ALIAS("ipt_string");
MODULE_ALIAS("ip6t_string");
static bool
string_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct xt_string_info *conf = par->matchinfo;
bool invert;
invert = conf->u.v1.flags & XT_STRING_FLAG_INVERT;
return (skb_find_text((struct sk_buff *)skb, conf->from_offset,
conf->to_offset, conf->config)
!= UINT_MAX) ^ invert;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 47 | 66.20% | 1 | 10.00% |
| Joonwoo Park | 14 | 19.72% | 1 | 10.00% |
| Jan Engelhardt | 7 | 9.86% | 5 | 50.00% |
| Patrick McHardy | 1 | 1.41% | 1 | 10.00% |
| Phil Oester | 1 | 1.41% | 1 | 10.00% |
| Harald Welte | 1 | 1.41% | 1 | 10.00% |
| Total | 71 | 100.00% | 10 | 100.00% |
#define STRING_TEXT_PRIV(m) ((struct xt_string_info *)(m))
static int string_mt_check(const struct xt_mtchk_param *par)
{
struct xt_string_info *conf = par->matchinfo;
struct ts_config *ts_conf;
int flags = TS_AUTOLOAD;
/* Damn, can't handle this case properly with iptables... */
if (conf->from_offset > conf->to_offset)
return -EINVAL;
if (conf->algo[XT_STRING_MAX_ALGO_NAME_SIZE - 1] != '\0')
return -EINVAL;
if (conf->patlen > XT_STRING_MAX_PATTERN_SIZE)
return -EINVAL;
if (conf->u.v1.flags &
~(XT_STRING_FLAG_IGNORECASE | XT_STRING_FLAG_INVERT))
return -EINVAL;
if (conf->u.v1.flags & XT_STRING_FLAG_IGNORECASE)
flags |= TS_IGNORECASE;
ts_conf = textsearch_prepare(conf->algo, conf->pattern, conf->patlen,
GFP_KERNEL, flags);
if (IS_ERR(ts_conf))
return PTR_ERR(ts_conf);
conf->config = ts_conf;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 67 | 43.23% | 1 | 10.00% |
| Joonwoo Park | 41 | 26.45% | 1 | 10.00% |
| Patrick McHardy | 27 | 17.42% | 2 | 20.00% |
| Jan Engelhardt | 19 | 12.26% | 5 | 50.00% |
| Harald Welte | 1 | 0.65% | 1 | 10.00% |
| Total | 155 | 100.00% | 10 | 100.00% |
static void string_mt_destroy(const struct xt_mtdtor_param *par)
{
textsearch_destroy(STRING_TEXT_PRIV(par->matchinfo)->config);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 17 | 70.83% | 1 | 25.00% |
| Jan Engelhardt | 5 | 20.83% | 2 | 50.00% |
| Patrick McHardy | 2 | 8.33% | 1 | 25.00% |
| Total | 24 | 100.00% | 4 | 100.00% |
static struct xt_match xt_string_mt_reg __read_mostly = {
.name = "string",
.revision = 1,
.family = NFPROTO_UNSPEC,
.checkentry = string_mt_check,
.match = string_mt,
.destroy = string_mt_destroy,
.matchsize = sizeof(struct xt_string_info),
.usersize = offsetof(struct xt_string_info, config),
.me = THIS_MODULE,
};
static int __init string_mt_init(void)
{
return xt_register_match(&xt_string_mt_reg);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 10 | 62.50% | 1 | 16.67% |
| Jan Engelhardt | 4 | 25.00% | 3 | 50.00% |
| Patrick McHardy | 1 | 6.25% | 1 | 16.67% |
| Harald Welte | 1 | 6.25% | 1 | 16.67% |
| Total | 16 | 100.00% | 6 | 100.00% |
static void __exit string_mt_exit(void)
{
xt_unregister_match(&xt_string_mt_reg);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 8 | 53.33% | 1 | 16.67% |
| Jan Engelhardt | 4 | 26.67% | 3 | 50.00% |
| Harald Welte | 2 | 13.33% | 1 | 16.67% |
| Patrick McHardy | 1 | 6.67% | 1 | 16.67% |
| Total | 15 | 100.00% | 6 | 100.00% |
module_init(string_mt_init);
module_exit(string_mt_exit);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 204 | 49.64% | 2 | 7.41% |
| Joonwoo Park | 66 | 16.06% | 1 | 3.70% |
| Jan Engelhardt | 48 | 11.68% | 13 | 48.15% |
| Patrick McHardy | 46 | 11.19% | 6 | 22.22% |
| Harald Welte | 31 | 7.54% | 1 | 3.70% |
| Willem de Bruijn | 11 | 2.68% | 1 | 3.70% |
| Tejun Heo | 3 | 0.73% | 1 | 3.70% |
| Phil Oester | 1 | 0.24% | 1 | 3.70% |
| Hideaki Yoshifuji / 吉藤英明 | 1 | 0.24% | 1 | 3.70% |
| Total | 411 | 100.00% | 27 | 100.00% |
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