diff options
Diffstat (limited to 'target/linux/generic-2.4/patches/609-netfilter_string.patch')
| -rw-r--r-- | target/linux/generic-2.4/patches/609-netfilter_string.patch | 348 |
1 files changed, 348 insertions, 0 deletions
diff --git a/target/linux/generic-2.4/patches/609-netfilter_string.patch b/target/linux/generic-2.4/patches/609-netfilter_string.patch new file mode 100644 index 0000000000..c8e1a2d2de --- /dev/null +++ b/target/linux/generic-2.4/patches/609-netfilter_string.patch @@ -0,0 +1,348 @@ +diff -Nur linux-2.4.32/include/linux/netfilter_ipv4/ipt_string.h linux-2.4.32.patch/include/linux/netfilter_ipv4/ipt_string.h +--- linux-2.4.32/include/linux/netfilter_ipv4/ipt_string.h 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.4.32.patch/include/linux/netfilter_ipv4/ipt_string.h 2005-12-16 00:40:19.082509250 +0100 +@@ -0,0 +1,18 @@ ++#ifndef _IPT_STRING_H ++#define _IPT_STRING_H ++ ++#define IPT_STRING_MAX_PATTERN_SIZE 128 ++#define IPT_STRING_MAX_ALGO_NAME_SIZE 16 ++ ++struct ipt_string_info ++{ ++ u_int16_t from_offset; ++ u_int16_t to_offset; ++ char algo[IPT_STRING_MAX_ALGO_NAME_SIZE]; ++ char pattern[IPT_STRING_MAX_PATTERN_SIZE]; ++ u_int8_t patlen; ++ u_int8_t invert; ++ struct ts_config __attribute__((aligned(8))) *config; ++}; ++ ++#endif /*_IPT_STRING_H*/ +diff -Nur linux-2.4.32/include/linux/textsearch.h linux-2.4.32.patch/include/linux/textsearch.h +--- linux-2.4.32/include/linux/textsearch.h 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.4.32.patch/include/linux/textsearch.h 2005-12-16 11:15:34.838073000 +0100 +@@ -0,0 +1,205 @@ ++#ifndef __LINUX_TEXTSEARCH_H ++#define __LINUX_TEXTSEARCH_H ++ ++#ifdef __KERNEL__ ++ ++#include <linux/types.h> ++#include <linux/list.h> ++#include <linux/kernel.h> ++#include <linux/module.h> ++#include <linux/slab.h> ++ ++#ifdef __CHECKER__ ++#define __bitwise__ __attribute__((bitwise)) ++#else ++#define __bitwise__ ++#endif ++#ifdef __CHECK_ENDIAN__ ++#define __bitwise __bitwise__ ++#else ++#define __bitwise ++#endif ++ ++typedef __u16 __bitwise __le16; ++typedef __u16 __bitwise __be16; ++typedef __u32 __bitwise __le32; ++typedef __u32 __bitwise __be32; ++#if defined(__GNUC__) && !defined(__STRICT_ANSI__) ++typedef __u64 __bitwise __le64; ++typedef __u64 __bitwise __be64; ++#endif ++ ++#ifdef __KERNEL__ ++typedef unsigned __bitwise__ gfp_t; ++#endif ++ ++struct ts_config; ++ ++/** ++ * TS_AUTOLOAD - Automatically load textsearch modules when needed ++ */ ++#define TS_AUTOLOAD 1 ++ ++/** ++ * struct ts_state - search state ++ * @offset: offset for next match ++ * @cb: control buffer, for persistant variables of get_next_block() ++ */ ++struct ts_state ++{ ++ unsigned int offset; ++ char cb[40]; ++}; ++ ++/** ++ * struct ts_ops - search module operations ++ * @name: name of search algorithm ++ * @init: initialization function to prepare a search ++ * @find: find the next occurrence of the pattern ++ * @destroy: destroy algorithm specific parts of a search configuration ++ * @get_pattern: return head of pattern ++ * @get_pattern_len: return length of pattern ++ * @owner: module reference to algorithm ++ */ ++struct ts_ops ++{ ++ const char *name; ++ struct ts_config * (*init)(const void *, unsigned int, gfp_t); ++ unsigned int (*find)(struct ts_config *, ++ struct ts_state *); ++ void (*destroy)(struct ts_config *); ++ void * (*get_pattern)(struct ts_config *); ++ unsigned int (*get_pattern_len)(struct ts_config *); ++ struct module *owner; ++ struct list_head list; ++}; ++ ++/** ++ * struct ts_config - search configuration ++ * @ops: operations of chosen algorithm ++ * @get_next_block: callback to fetch the next block to search in ++ * @finish: callback to finalize a search ++ */ ++struct ts_config ++{ ++ struct ts_ops *ops; ++ ++ /** ++ * get_next_block - fetch next block of data ++ * @consumed: number of bytes consumed by the caller ++ * @dst: destination buffer ++ * @conf: search configuration ++ * @state: search state ++ * ++ * Called repeatedly until 0 is returned. Must assign the ++ * head of the next block of data to &*dst and return the length ++ * of the block or 0 if at the end. consumed == 0 indicates ++ * a new search. May store/read persistant values in state->cb. ++ */ ++ unsigned int (*get_next_block)(unsigned int consumed, ++ const u8 **dst, ++ struct ts_config *conf, ++ struct ts_state *state); ++ ++ /** ++ * finish - finalize/clean a series of get_next_block() calls ++ * @conf: search configuration ++ * @state: search state ++ * ++ * Called after the last use of get_next_block(), may be used ++ * to cleanup any leftovers. ++ */ ++ void (*finish)(struct ts_config *conf, ++ struct ts_state *state); ++}; ++ ++/** ++ * textsearch_next - continue searching for a pattern ++ * @conf: search configuration ++ * @state: search state ++ * ++ * Continues a search looking for more occurrences of the pattern. ++ * textsearch_find() must be called to find the first occurrence ++ * in order to reset the state. ++ * ++ * Returns the position of the next occurrence of the pattern or ++ * UINT_MAX if not match was found. ++ */ ++static inline unsigned int textsearch_next(struct ts_config *conf, ++ struct ts_state *state) ++{ ++ unsigned int ret = conf->ops->find(conf, state); ++ ++ if (conf->finish) ++ conf->finish(conf, state); ++ ++ return ret; ++} ++ ++/** ++ * textsearch_find - start searching for a pattern ++ * @conf: search configuration ++ * @state: search state ++ * ++ * Returns the position of first occurrence of the pattern or ++ * UINT_MAX if no match was found. ++ */ ++static inline unsigned int textsearch_find(struct ts_config *conf, ++ struct ts_state *state) ++{ ++ state->offset = 0; ++ return textsearch_next(conf, state); ++} ++ ++/** ++ * textsearch_get_pattern - return head of the pattern ++ * @conf: search configuration ++ */ ++static inline void *textsearch_get_pattern(struct ts_config *conf) ++{ ++ return conf->ops->get_pattern(conf); ++} ++ ++/** ++ * textsearch_get_pattern_len - return length of the pattern ++ * @conf: search configuration ++ */ ++static inline unsigned int textsearch_get_pattern_len(struct ts_config *conf) ++{ ++ return conf->ops->get_pattern_len(conf); ++} ++ ++extern int textsearch_register(struct ts_ops *); ++extern int textsearch_unregister(struct ts_ops *); ++extern struct ts_config *textsearch_prepare(const char *, const void *, ++ unsigned int, gfp_t, int); ++extern void textsearch_destroy(struct ts_config *conf); ++extern unsigned int textsearch_find_continuous(struct ts_config *, ++ struct ts_state *, ++ const void *, unsigned int); ++ ++ ++#define TS_PRIV_ALIGNTO 8 ++#define TS_PRIV_ALIGN(len) (((len) + TS_PRIV_ALIGNTO-1) & ~(TS_PRIV_ALIGNTO-1)) ++ ++static inline struct ts_config *alloc_ts_config(size_t payload, ++ gfp_t gfp_mask) ++{ ++ struct ts_config *conf; ++ ++ conf = kmalloc(TS_PRIV_ALIGN(sizeof(*conf)) + payload, gfp_mask); ++ if (conf == NULL) ++ return -ENOMEM; ++ ++ memset(conf, 0, TS_PRIV_ALIGN(sizeof(*conf)) + payload); ++ return conf; ++} ++ ++static inline void *ts_config_priv(struct ts_config *conf) ++{ ++ return ((u8 *) conf + TS_PRIV_ALIGN(sizeof(struct ts_config))); ++} ++ ++#endif /* __KERNEL__ */ ++ ++#endif +diff -Nur linux-2.4.32/net/ipv4/netfilter/Config.in linux-2.4.32.patch/net/ipv4/netfilter/Config.in +--- linux-2.4.32/net/ipv4/netfilter/Config.in 2005-01-19 15:10:13.000000000 +0100 ++++ linux-2.4.32.patch/net/ipv4/netfilter/Config.in 2005-12-16 00:41:43.023755250 +0100 +@@ -42,6 +42,7 @@ + fi + if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then + dep_tristate ' Unclean match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_UNCLEAN $CONFIG_IP_NF_IPTABLES ++ dep_tristate ' String match support (EXPERIMENTAL) ' CONFIG_IP_NF_MATCH_STRING $CONFIG_IP_NF_IPTABLES + dep_tristate ' Owner match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_OWNER $CONFIG_IP_NF_IPTABLES + fi + # The targets +diff -Nur linux-2.4.32/net/ipv4/netfilter/ipt_string.c linux-2.4.32.patch/net/ipv4/netfilter/ipt_string.c +--- linux-2.4.32/net/ipv4/netfilter/ipt_string.c 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.4.32.patch/net/ipv4/netfilter/ipt_string.c 2005-12-16 00:40:48.436343750 +0100 +@@ -0,0 +1,91 @@ ++/* 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/init.h> ++#include <linux/module.h> ++#include <linux/kernel.h> ++#include <linux/skbuff.h> ++#include <linux/netfilter_ipv4/ip_tables.h> ++#include <linux/netfilter_ipv4/ipt_string.h> ++#include <linux/textsearch.h> ++ ++MODULE_AUTHOR("Pablo Neira Ayuso <pablo@eurodev.net>"); ++MODULE_DESCRIPTION("IP tables string match module"); ++MODULE_LICENSE("GPL"); ++ ++static int match(const struct sk_buff *skb, ++ const struct net_device *in, ++ const struct net_device *out, ++ const void *matchinfo, ++ int offset, ++ int *hotdrop) ++{ ++ struct ts_state state; ++ struct ipt_string_info *conf = (struct ipt_string_info *) matchinfo; ++ ++ memset(&state, 0, sizeof(struct ts_state)); ++ ++ return (skb_find_text((struct sk_buff *)skb, conf->from_offset, ++ conf->to_offset, conf->config, &state) ++ != UINT_MAX) && !conf->invert; ++} ++ ++#define STRING_TEXT_PRIV(m) ((struct ipt_string_info *) m) ++ ++static int checkentry(const char *tablename, ++ const struct ipt_ip *ip, ++ void *matchinfo, ++ unsigned int matchsize, ++ unsigned int hook_mask) ++{ ++ struct ipt_string_info *conf = matchinfo; ++ struct ts_config *ts_conf; ++ ++ if (matchsize != IPT_ALIGN(sizeof(struct ipt_string_info))) ++ return 0; ++ ++ /* Damn, can't handle this case properly with iptables... */ ++ if (conf->from_offset > conf->to_offset) ++ return 0; ++ ++ ts_conf = textsearch_prepare(conf->algo, conf->pattern, conf->patlen, ++ GFP_KERNEL, TS_AUTOLOAD); ++ if (IS_ERR(ts_conf)) ++ return 0; ++ ++ conf->config = ts_conf; ++ ++ return 1; ++} ++ ++static void destroy(void *matchinfo, unsigned int matchsize) ++{ ++ textsearch_destroy(STRING_TEXT_PRIV(matchinfo)->config); ++} ++ ++static struct ipt_match string_match = { ++ .name = "string", ++ .match = match, ++ .checkentry = checkentry, ++ .destroy = destroy, ++ .me = THIS_MODULE ++}; ++ ++static int __init init(void) ++{ ++ return ipt_register_match(&string_match); ++} ++ ++static void __exit fini(void) ++{ ++ ipt_unregister_match(&string_match); ++} ++ ++module_init(init); ++module_exit(fini); +diff -Nur linux-2.4.32/net/ipv4/netfilter/Makefile linux-2.4.32.patch/net/ipv4/netfilter/Makefile +--- linux-2.4.32/net/ipv4/netfilter/Makefile 2003-08-25 13:44:44.000000000 +0200 ++++ linux-2.4.32.patch/net/ipv4/netfilter/Makefile 2005-12-16 00:42:10.929499250 +0100 +@@ -85,6 +85,7 @@ + obj-$(CONFIG_IP_NF_MATCH_STATE) += ipt_state.o + obj-$(CONFIG_IP_NF_MATCH_CONNTRACK) += ipt_conntrack.o + obj-$(CONFIG_IP_NF_MATCH_UNCLEAN) += ipt_unclean.o ++obj-$(CONFIG_IP_NF_MATCH_STRING) += ipt_string.o + obj-$(CONFIG_IP_NF_MATCH_TCPMSS) += ipt_tcpmss.o + + # targets |