From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/net/netfilter/xt_string.c | 94 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 94 insertions(+) create mode 100644 kernel/net/netfilter/xt_string.c (limited to 'kernel/net/netfilter/xt_string.c') diff --git a/kernel/net/netfilter/xt_string.c b/kernel/net/netfilter/xt_string.c new file mode 100644 index 000000000..0bc346031 --- /dev/null +++ b/kernel/net/netfilter/xt_string.c @@ -0,0 +1,94 @@ +/* String matching match for iptables + * + * (C) 2005 Pablo Neira Ayuso + * + * 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 +#include +#include +#include +#include +#include +#include +#include + +MODULE_AUTHOR("Pablo Neira Ayuso "); +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; +} + +#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; +} + +static void string_mt_destroy(const struct xt_mtdtor_param *par) +{ + textsearch_destroy(STRING_TEXT_PRIV(par->matchinfo)->config); +} + +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), + .me = THIS_MODULE, +}; + +static int __init string_mt_init(void) +{ + return xt_register_match(&xt_string_mt_reg); +} + +static void __exit string_mt_exit(void) +{ + xt_unregister_match(&xt_string_mt_reg); +} + +module_init(string_mt_init); +module_exit(string_mt_exit); -- cgit 1.2.3-korg