diff options
Diffstat (limited to 'target/linux/generic-2.6/patches-2.6.23')
-rw-r--r-- | target/linux/generic-2.6/patches-2.6.23/101-netfilter_layer7_pktmatch.patch | 113 | ||||
-rw-r--r-- | target/linux/generic-2.6/patches-2.6.23/170-netfilter_chaostables_0.8.patch (renamed from target/linux/generic-2.6/patches-2.6.23/170-netfilter_chaostables.patch) | 652 | ||||
-rw-r--r-- | target/linux/generic-2.6/patches-2.6.23/171-netfilter_tarpit.patch | 20 |
3 files changed, 397 insertions, 388 deletions
diff --git a/target/linux/generic-2.6/patches-2.6.23/101-netfilter_layer7_pktmatch.patch b/target/linux/generic-2.6/patches-2.6.23/101-netfilter_layer7_pktmatch.patch new file mode 100644 index 0000000..2574543 --- /dev/null +++ b/target/linux/generic-2.6/patches-2.6.23/101-netfilter_layer7_pktmatch.patch @@ -0,0 +1,113 @@ +Index: linux-2.6.23.16/include/linux/netfilter/xt_layer7.h +=================================================================== +--- linux-2.6.23.16.orig/include/linux/netfilter/xt_layer7.h ++++ linux-2.6.23.16/include/linux/netfilter/xt_layer7.h +@@ -8,6 +8,7 @@ struct xt_layer7_info { + char protocol[MAX_PROTOCOL_LEN]; + char pattern[MAX_PATTERN_LEN]; + u_int8_t invert; ++ u_int8_t pkt; + }; + + #endif /* _XT_LAYER7_H */ +Index: linux-2.6.23.16/net/netfilter/xt_layer7.c +=================================================================== +--- linux-2.6.23.16.orig/net/netfilter/xt_layer7.c ++++ linux-2.6.23.16/net/netfilter/xt_layer7.c +@@ -297,34 +297,36 @@ static int match_no_append(struct nf_con + } + + /* add the new app data to the conntrack. Return number of bytes added. */ +-static int add_data(struct nf_conn * master_conntrack, +- char * app_data, int appdatalen) ++static int add_datastr(char *target, int offset, char *app_data, int len) + { + int length = 0, i; +- int oldlength = master_conntrack->layer7.app_data_len; +- +- /* This is a fix for a race condition by Deti Fliegl. However, I'm not +- clear on whether the race condition exists or whether this really +- fixes it. I might just be being dense... Anyway, if it's not really +- a fix, all it does is waste a very small amount of time. */ +- if(!master_conntrack->layer7.app_data) return 0; ++ ++ if (!target) return 0; + + /* Strip nulls. Make everything lower case (our regex lib doesn't + do case insensitivity). Add it to the end of the current data. */ +- for(i = 0; i < maxdatalen-oldlength-1 && +- i < appdatalen; i++) { ++ for(i = 0; i < maxdatalen-offset-1 && i < len; i++) { + if(app_data[i] != '\0') { + /* the kernel version of tolower mungs 'upper ascii' */ +- master_conntrack->layer7.app_data[length+oldlength] = ++ target[length+offset] = + isascii(app_data[i])? + tolower(app_data[i]) : app_data[i]; + length++; + } + } ++ target[length+offset] = '\0'; ++ ++ return length; ++} + +- master_conntrack->layer7.app_data[length+oldlength] = '\0'; +- master_conntrack->layer7.app_data_len = length + oldlength; ++/* add the new app data to the conntrack. Return number of bytes added. */ ++static int add_data(struct nf_conn * master_conntrack, ++ char * app_data, int appdatalen) ++{ ++ int length; + ++ length = add_datastr(master_conntrack->layer7.app_data, master_conntrack->layer7.app_data_len, app_data, appdatalen); ++ master_conntrack->layer7.app_data_len += length; + return length; + } + +@@ -411,7 +413,7 @@ match(const struct sk_buff *skbin, + const struct xt_layer7_info * info = matchinfo; + enum ip_conntrack_info master_ctinfo, ctinfo; + struct nf_conn *master_conntrack, *conntrack; +- unsigned char * app_data; ++ unsigned char *app_data, *tmp_data; + unsigned int pattern_result, appdatalen; + regexp * comppattern; + +@@ -439,8 +441,8 @@ match(const struct sk_buff *skbin, + master_conntrack = master_ct(master_conntrack); + + /* if we've classified it or seen too many packets */ +- if(TOTAL_PACKETS > num_packets || +- master_conntrack->layer7.app_proto) { ++ if(!info->pkt && (TOTAL_PACKETS > num_packets || ++ master_conntrack->layer7.app_proto)) { + + pattern_result = match_no_append(conntrack, master_conntrack, + ctinfo, master_ctinfo, info); +@@ -473,6 +475,25 @@ match(const struct sk_buff *skbin, + /* the return value gets checked later, when we're ready to use it */ + comppattern = compile_and_cache(info->pattern, info->protocol); + ++ if (info->pkt) { ++ tmp_data = kmalloc(maxdatalen, GFP_ATOMIC); ++ if(!tmp_data){ ++ if (net_ratelimit()) ++ printk(KERN_ERR "layer7: out of memory in match, bailing.\n"); ++ return info->invert; ++ } ++ ++ tmp_data[0] = '\0'; ++ add_datastr(tmp_data, 0, app_data, appdatalen); ++ pattern_result = ((comppattern && regexec(comppattern, tmp_data)) ? 1 : 0); ++ ++ kfree(tmp_data); ++ tmp_data = NULL; ++ spin_unlock_bh(&l7_lock); ++ ++ return (pattern_result ^ info->invert); ++ } ++ + /* On the first packet of a connection, allocate space for app data */ + if(TOTAL_PACKETS == 1 && !skb->cb[0] && + !master_conntrack->layer7.app_data){ diff --git a/target/linux/generic-2.6/patches-2.6.23/170-netfilter_chaostables.patch b/target/linux/generic-2.6/patches-2.6.23/170-netfilter_chaostables_0.8.patch index cfc0092..ad9e059 100644 --- a/target/linux/generic-2.6/patches-2.6.23/170-netfilter_chaostables.patch +++ b/target/linux/generic-2.6/patches-2.6.23/170-netfilter_chaostables_0.8.patch @@ -1,17 +1,17 @@ -Index: linux-2.6.23/include/linux/netfilter/oot_conntrack.h +Index: linux-2.6.23.16/include/linux/netfilter/oot_conntrack.h =================================================================== ---- /dev/null 1970-01-01 00:00:00.000000000 +0000 -+++ linux-2.6.23/include/linux/netfilter/oot_conntrack.h 2007-10-10 13:52:59.000000000 +0800 +--- /dev/null ++++ linux-2.6.23.16/include/linux/netfilter/oot_conntrack.h @@ -0,0 +1,5 @@ +#if defined(CONFIG_IP_NF_CONNTRACK) || defined(CONFIG_IP_NF_CONNTRACK_MODULE) +# include <linux/netfilter_ipv4/ip_conntrack.h> +#else /* linux-2.6.20+ */ +# include <net/netfilter/nf_nat_rule.h> +#endif -Index: linux-2.6.23/include/linux/netfilter/oot_trans.h +Index: linux-2.6.23.16/include/linux/netfilter/oot_trans.h =================================================================== ---- /dev/null 1970-01-01 00:00:00.000000000 +0000 -+++ linux-2.6.23/include/linux/netfilter/oot_trans.h 2007-10-10 13:52:59.000000000 +0800 +--- /dev/null ++++ linux-2.6.23.16/include/linux/netfilter/oot_trans.h @@ -0,0 +1,14 @@ +/* Out of tree workarounds */ +#include <linux/version.h> @@ -27,42 +27,42 @@ Index: linux-2.6.23/include/linux/netfilter/oot_trans.h +# define tcp_v4_check(tcph, tcph_sz, s, d, csp) \ + tcp_v4_check((tcph_sz), (s), (d), (csp)) +#endif -Index: linux-2.6.23/include/linux/netfilter/xt_CHAOS.h +Index: linux-2.6.23.16/include/linux/netfilter/xt_CHAOS.h =================================================================== ---- /dev/null 1970-01-01 00:00:00.000000000 +0000 -+++ linux-2.6.23/include/linux/netfilter/xt_CHAOS.h 2007-10-10 13:52:59.000000000 +0800 +--- /dev/null ++++ linux-2.6.23.16/include/linux/netfilter/xt_CHAOS.h @@ -0,0 +1,14 @@ -+#ifndef _LINUX_XT_CHAOS_H -+#define _LINUX_XT_CHAOS_H 1 ++#ifndef _LINUX_NETFILTER_XT_CHAOS_H ++#define _LINUX_NETFILTER_XT_CHAOS_H 1 + -+enum xt_chaos_variant { ++enum xt_chaos_target_variant { + XTCHAOS_NORMAL, + XTCHAOS_TARPIT, + XTCHAOS_DELUDE, +}; + -+struct xt_chaos_info { -+ enum xt_chaos_variant variant; ++struct xt_chaos_target_info { ++ uint8_t variant; +}; + -+#endif /* _LINUX_XT_CHAOS_H */ -Index: linux-2.6.23/include/linux/netfilter/xt_portscan.h ++#endif /* _LINUX_NETFILTER_XT_CHAOS_H */ +Index: linux-2.6.23.16/include/linux/netfilter/xt_portscan.h =================================================================== ---- /dev/null 1970-01-01 00:00:00.000000000 +0000 -+++ linux-2.6.23/include/linux/netfilter/xt_portscan.h 2007-10-10 13:52:59.000000000 +0800 +--- /dev/null ++++ linux-2.6.23.16/include/linux/netfilter/xt_portscan.h @@ -0,0 +1,8 @@ -+#ifndef _LINUX_XT_PORTSCAN_H -+#define _LINUX_XT_PORTSCAN_H 1 ++#ifndef _LINUX_NETFILTER_XT_PORTSCAN_H ++#define _LINUX_NETFILTER_XT_PORTSCAN_H 1 + -+struct xt_portscan_info { -+ unsigned int match_stealth, match_syn, match_cn, match_gr; ++struct xt_portscan_match_info { ++ uint8_t match_stealth, match_syn, match_cn, match_gr; +}; + -+#endif /* _LINUX_XT_PORTSCAN_H */ -Index: linux-2.6.23/net/netfilter/find_match.c ++#endif /* _LINUX_NETFILTER_XT_PORTSCAN_H */ +Index: linux-2.6.23.16/net/netfilter/find_match.c =================================================================== ---- /dev/null 1970-01-01 00:00:00.000000000 +0000 -+++ linux-2.6.23/net/netfilter/find_match.c 2007-10-10 13:52:59.000000000 +0800 +--- /dev/null ++++ linux-2.6.23.16/net/netfilter/find_match.c @@ -0,0 +1,39 @@ +/* + xt_request_find_match @@ -95,7 +95,7 @@ Index: linux-2.6.23/net/netfilter/find_match.c + + match = try_then_request_module(xt_find_match(af, name, revision), + "%st_%s", xt_prefix[af], name); -+ if(IS_ERR(match) || match == NULL) ++ if (IS_ERR(match) || match == NULL) + return NULL; + + return match; @@ -103,11 +103,11 @@ Index: linux-2.6.23/net/netfilter/find_match.c + +/* In case it goes into mainline, let this out-of-tree package compile */ +#define xt_request_find_match xt_request_find_match_lo -Index: linux-2.6.23/net/netfilter/Kconfig +Index: linux-2.6.23.16/net/netfilter/Kconfig =================================================================== ---- linux-2.6.23.orig/net/netfilter/Kconfig 2007-10-10 04:31:38.000000000 +0800 -+++ linux-2.6.23/net/netfilter/Kconfig 2007-10-10 13:53:04.000000000 +0800 -@@ -265,6 +265,14 @@ +--- linux-2.6.23.16.orig/net/netfilter/Kconfig ++++ linux-2.6.23.16/net/netfilter/Kconfig +@@ -265,6 +265,14 @@ config NETFILTER_XTABLES # alphabetically ordered list of targets @@ -122,7 +122,7 @@ Index: linux-2.6.23/net/netfilter/Kconfig config NETFILTER_XT_TARGET_CLASSIFY tristate '"CLASSIFY" target support' depends on NETFILTER_XTABLES -@@ -292,6 +300,14 @@ +@@ -292,6 +300,14 @@ config NETFILTER_XT_TARGET_CONNMARK <file:Documentation/kbuild/modules.txt>. The module will be called ipt_CONNMARK.ko. If unsure, say `N'. @@ -137,7 +137,7 @@ Index: linux-2.6.23/net/netfilter/Kconfig config NETFILTER_XT_TARGET_DSCP tristate '"DSCP" target support' depends on NETFILTER_XTABLES -@@ -556,6 +572,14 @@ +@@ -556,6 +572,14 @@ config NETFILTER_XT_MATCH_POLICY To compile it as a module, choose M here. If unsure, say N. @@ -152,42 +152,38 @@ Index: linux-2.6.23/net/netfilter/Kconfig config NETFILTER_XT_MATCH_MULTIPORT tristate "Multiple port match support" depends on NETFILTER_XTABLES -Index: linux-2.6.23/net/netfilter/Makefile +Index: linux-2.6.23.16/net/netfilter/Makefile =================================================================== ---- linux-2.6.23.orig/net/netfilter/Makefile 2007-10-10 04:31:38.000000000 +0800 -+++ linux-2.6.23/net/netfilter/Makefile 2007-10-10 13:52:59.000000000 +0800 -@@ -38,8 +38,10 @@ - obj-$(CONFIG_NETFILTER_XTABLES) += x_tables.o xt_tcpudp.o - - # targets +--- linux-2.6.23.16.orig/net/netfilter/Makefile ++++ linux-2.6.23.16/net/netfilter/Makefile +@@ -49,6 +49,8 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_TRACE) + obj-$(CONFIG_NETFILTER_XT_TARGET_SECMARK) += xt_SECMARK.o + obj-$(CONFIG_NETFILTER_XT_TARGET_TCPMSS) += xt_TCPMSS.o + obj-$(CONFIG_NETFILTER_XT_TARGET_CONNSECMARK) += xt_CONNSECMARK.o +obj-$(CONFIG_NETFILTER_XT_TARGET_CHAOS) += xt_CHAOS.o - obj-$(CONFIG_NETFILTER_XT_TARGET_CLASSIFY) += xt_CLASSIFY.o - obj-$(CONFIG_NETFILTER_XT_TARGET_CONNMARK) += xt_CONNMARK.o +obj-$(CONFIG_NETFILTER_XT_TARGET_DELUDE) += xt_DELUDE.o - obj-$(CONFIG_NETFILTER_XT_TARGET_DSCP) += xt_DSCP.o - obj-$(CONFIG_NETFILTER_XT_TARGET_MARK) += xt_MARK.o - obj-$(CONFIG_NETFILTER_XT_TARGET_NFQUEUE) += xt_NFQUEUE.o -@@ -66,6 +68,7 @@ - obj-$(CONFIG_NETFILTER_XT_MATCH_MARK) += xt_mark.o - obj-$(CONFIG_NETFILTER_XT_MATCH_MULTIPORT) += xt_multiport.o - obj-$(CONFIG_NETFILTER_XT_MATCH_POLICY) += xt_policy.o + + # matches + obj-$(CONFIG_NETFILTER_XT_MATCH_COMMENT) += xt_comment.o +@@ -78,3 +80,4 @@ obj-$(CONFIG_NETFILTER_XT_MATCH_TCPMSS) + obj-$(CONFIG_NETFILTER_XT_MATCH_PHYSDEV) += xt_physdev.o + obj-$(CONFIG_NETFILTER_XT_MATCH_U32) += xt_u32.o + obj-$(CONFIG_NETFILTER_XT_MATCH_HASHLIMIT) += xt_hashlimit.o +obj-$(CONFIG_NETFILTER_XT_MATCH_PORTSCAN) += xt_portscan.o - obj-$(CONFIG_NETFILTER_XT_MATCH_PKTTYPE) += xt_pkttype.o - obj-$(CONFIG_NETFILTER_XT_MATCH_QUOTA) += xt_quota.o - obj-$(CONFIG_NETFILTER_XT_MATCH_REALM) += xt_realm.o -Index: linux-2.6.23/net/netfilter/xt_CHAOS.c +Index: linux-2.6.23.16/net/netfilter/xt_CHAOS.c =================================================================== ---- /dev/null 1970-01-01 00:00:00.000000000 +0000 -+++ linux-2.6.23/net/netfilter/xt_CHAOS.c 2007-10-10 13:52:59.000000000 +0800 -@@ -0,0 +1,205 @@ +--- /dev/null ++++ linux-2.6.23.16/net/netfilter/xt_CHAOS.c +@@ -0,0 +1,200 @@ +/* -+ CHAOS target for netfilter -+ -+ Copyright © Jan Engelhardt <jengelh [at] gmx de>, 2006 - 2007 -+ 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. -+*/ ++ * CHAOS target for netfilter ++ * Copyright © CC Computer Consultants GmbH, 2006 - 2007 ++ * Contact: Jan Engelhardt <jengelh@computergmbh.de> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License; either version ++ * 2 or 3 as published by the Free Software Foundation. ++ */ +#include <linux/icmp.h> +#include <linux/in.h> +#include <linux/ip.h> @@ -198,9 +194,17 @@ Index: linux-2.6.23/net/netfilter/xt_CHAOS.c +#include <linux/netfilter/xt_tcpudp.h> +#include <linux/netfilter_ipv4/ipt_REJECT.h> +#include <net/ip.h> -+#include <linux/netfilter/xt_CHAOS.h> -+#include "find_match.c" -+#include <linux/netfilter/oot_trans.h> ++#if defined(_LOCAL) ++# include "xt_CHAOS.h" ++# include "find_match.c" ++#elif defined(CONFIG_NETFILTER_XT_TARGET_CHAOS) || \ ++ defined(CONFIG_NETFILTER_XT_TARGET_CHAOS_MODULE) ++# include <linux/netfilter/xt_CHAOS.h> ++# include "find_match.c" ++#else ++# include "xt_CHAOS.h" ++# include "find_match.c" ++#endif +#define PFX KBUILD_MODNAME ": " + +/* Module parameters */ @@ -226,111 +230,97 @@ Index: linux-2.6.23/net/netfilter/xt_CHAOS.c +}; + +/* CHAOS functions */ -+static void xt_chaos_total(const struct xt_chaos_info *info, ++static void xt_chaos_total(const struct xt_chaos_target_info *info, + struct sk_buff **pskb, const struct net_device *in, + const struct net_device *out, unsigned int hooknum) +{ -+ const int protoff = ip_hdrlen(*pskb); -+ const int offset = ntohs(ip_hdr(*pskb)->frag_off) & IP_OFFSET; ++ const struct iphdr *iph = ip_hdr(*pskb); ++ const int protoff = 4 * iph->ihl; ++ const int offset = ntohs(iph->frag_off) & IP_OFFSET; + const struct xt_target *destiny; -+ bool hotdrop = false; -+ int ret; ++ bool hotdrop = false, ret; + + ret = xm_tcp->match(*pskb, in, out, xm_tcp, &tcp_params, + offset, protoff, &hotdrop); -+ if(!ret || hotdrop || (unsigned int)net_random() > delude_percentage) ++ if (!ret || hotdrop || (unsigned int)net_random() > delude_percentage) + return; + + destiny = (info->variant == XTCHAOS_TARPIT) ? xt_tarpit : xt_delude; -+#ifdef HAVE_TARGUSERINFO -+ destiny->target(pskb, in, out, hooknum, destiny, NULL, NULL); -+#else + destiny->target(pskb, in, out, hooknum, destiny, NULL); -+#endif + return; +} + -+static unsigned int xt_chaos_target(struct sk_buff **pskb, ++static unsigned int chaos_tg(struct sk_buff **pskb, + const struct net_device *in, const struct net_device *out, -+ unsigned int hooknum, const struct xt_target *target, const void *targinfo -+#ifdef HAVE_TARGUSERINFO -+ , -+ void *userinfo -+#endif -+ ) ++ unsigned int hooknum, const struct xt_target *target, const void *targinfo) +{ -+ /* Equivalent to: ++ /* ++ * Equivalent to: + * -A chaos -m statistic --mode random --probability \ + * $reject_percentage -j REJECT --reject-with host-unreach; + * -A chaos -p tcp -m statistic --mode random --probability \ + * $delude_percentage -j DELUDE; + * -A chaos -j DROP; + */ -+ const struct xt_chaos_info *info = targinfo; ++ const struct xt_chaos_target_info *info = targinfo; ++ const struct iphdr *iph = ip_hdr(*pskb); + -+ if((unsigned int)net_random() <= reject_percentage) -+#ifdef HAVE_TARGUSERINFO -+ return xt_reject->target(pskb, in, out, hooknum, target, -+ &reject_params, userinfo); -+#else ++ if ((unsigned int)net_random() <= reject_percentage) + return xt_reject->target(pskb, in, out, hooknum, target, + &reject_params); -+#endif + + /* TARPIT/DELUDE may not be called from the OUTPUT chain */ -+ if(ip_hdr(*pskb)->protocol == IPPROTO_TCP && -+ info->variant != XTCHAOS_NORMAL && hooknum != NF_IP_LOCAL_OUT) ++ if (iph->protocol == IPPROTO_TCP && ++ info->variant != XTCHAOS_NORMAL && hooknum != NF_IP_LOCAL_OUT) + xt_chaos_total(info, pskb, in, out, hooknum); + + return NF_DROP; +} + -+static bool xt_chaos_checkentry(const char *tablename, const void *entry, -+ const struct xt_target *target, void *targinfo, -+#ifdef HAVE_TARGINFOSIZE -+ unsigned int targinfosize, -+#endif -+ unsigned int hook_mask) ++static bool chaos_tg_check(const char *tablename, const void *entry, ++ const struct xt_target *target, void *targinfo, unsigned int hook_mask) +{ -+ const struct xt_chaos_info *info = targinfo; -+ if(info->variant == XTCHAOS_DELUDE && !have_delude) { ++ const struct xt_chaos_target_info *info = targinfo; ++ ++ if (info->variant == XTCHAOS_DELUDE && !have_delude) { + printk(KERN_WARNING PFX "Error: Cannot use --delude when " + "DELUDE module not available\n"); + return false; + } -+ if(info->variant == XTCHAOS_TARPIT && !have_tarpit) { ++ if (info->variant == XTCHAOS_TARPIT && !have_tarpit) { + printk(KERN_WARNING PFX "Error: Cannot use --tarpit when " + "TARPIT module not available\n"); + return false; + } ++ + return true; +} + -+static struct xt_target xt_chaos_info = { ++static struct xt_target chaos_tg_reg = { + .name = "CHAOS", -+ .target = xt_chaos_target, -+ .checkentry = xt_chaos_checkentry, ++ .family = AF_INET, + .table = "filter", -+ .targetsize = sizeof(struct xt_chaos_info), + .hooks = (1 << NF_IP_LOCAL_IN) | (1 << NF_IP_FORWARD) | + (1 << NF_IP_LOCAL_OUT), -+ .family = AF_INET, ++ .checkentry = chaos_tg_check, ++ .target = chaos_tg, ++ .targetsize = sizeof(struct xt_chaos_target_info), + .me = THIS_MODULE, +}; + -+static int __init xt_chaos_init(void) ++static int __init chaos_tg_init(void) +{ + int ret = -EINVAL; + + xm_tcp = xt_request_find_match(AF_INET, "tcp", 0); -+ if(xm_tcp == NULL) { ++ if (xm_tcp == NULL) { + printk(KERN_WARNING PFX "Error: Could not find or load " + "\"tcp\" match\n"); + return -EINVAL; + } + + xt_reject = xt_request_find_target(AF_INET, "REJECT", 0); -+ if(xt_reject == NULL) { ++ if (xt_reject == NULL) { + printk(KERN_WARNING PFX "Error: Could not find or load " + "\"REJECT\" target\n"); + goto out2; @@ -338,17 +328,17 @@ Index: linux-2.6.23/net/netfilter/xt_CHAOS.c + + xt_tarpit = xt_request_find_target(AF_INET, "TARPIT", 0); + have_tarpit = xt_tarpit != NULL; -+ if(!have_tarpit) ++ if (!have_tarpit) + printk(KERN_WARNING PFX "Warning: Could not find or load " + "\"TARPIT\" target\n"); + + xt_delude = xt_request_find_target(AF_INET, "DELUDE", 0); + have_delude = xt_delude != NULL; -+ if(!have_delude) ++ if (!have_delude) + printk(KERN_WARNING PFX "Warning: Could not find or load " + "\"DELUDE\" target\n"); + -+ if((ret = xt_register_target(&xt_chaos_info)) != 0) { ++ if ((ret = xt_register_target(&chaos_tg_reg)) != 0) { + printk(KERN_WARNING PFX "xt_register_target returned " + "error %d\n", ret); + goto out3; @@ -357,9 +347,9 @@ Index: linux-2.6.23/net/netfilter/xt_CHAOS.c + return 0; + + out3: -+ if(have_delude) ++ if (have_delude) + module_put(xt_delude->me); -+ if(have_tarpit) ++ if (have_tarpit) + module_put(xt_tarpit->me); + module_put(xt_reject->me); + out2: @@ -367,132 +357,67 @@ Index: linux-2.6.23/net/netfilter/xt_CHAOS.c + return ret; +} + -+static void __exit xt_chaos_exit(void) ++static void __exit chaos_tg_exit(void) +{ -+ xt_unregister_target(&xt_chaos_info); ++ xt_unregister_target(&chaos_tg_reg); + module_put(xm_tcp->me); + module_put(xt_reject->me); -+ if(have_delude) ++ if (have_delude) + module_put(xt_delude->me); -+ if(have_tarpit) ++ if (have_tarpit) + module_put(xt_tarpit->me); + return; +} + -+module_init(xt_chaos_init); -+module_exit(xt_chaos_exit); -+MODULE_AUTHOR("Jan Engelhardt <jengelh@gmx.de>"); -+MODULE_DESCRIPTION("netfilter CHAOS target"); ++module_init(chaos_tg_init); ++module_exit(chaos_tg_exit); ++MODULE_AUTHOR("Jan Engelhardt <jengelh@computergmbh.de>"); ++MODULE_DESCRIPTION("netfilter \"CHAOS\" target"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("ipt_CHAOS"); -Index: linux-2.6.23/net/netfilter/xt_DELUDE.c +Index: linux-2.6.23.16/net/netfilter/xt_DELUDE.c =================================================================== ---- /dev/null 1970-01-01 00:00:00.000000000 +0000 -+++ linux-2.6.23/net/netfilter/xt_DELUDE.c 2007-10-10 13:52:59.000000000 +0800 -@@ -0,0 +1,288 @@ +--- /dev/null ++++ linux-2.6.23.16/net/netfilter/xt_DELUDE.c +@@ -0,0 +1,197 @@ +/* -+ DELUDE target -+ Copyright © Jan Engelhardt <jengelh [at] gmx de>, 2007 -+ -+ Based upon linux-2.6.18.5/net/ipv4/netfilter/ipt_REJECT.c: -+ (C) 1999-2001 Paul `Rusty' Russell -+ (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org> -+ -+ xt_DELUDE acts like REJECT, but does reply with SYN-ACK on SYN. -+ -+ 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. -+*/ ++ * DELUDE target ++ * Copyright © CC Computer Consultants GmbH, 2007 ++ * Contact: Jan Engelhardt <jengelh@computergmbh.de> ++ * ++ * Based upon linux-2.6.18.5/net/ipv4/netfilter/ipt_REJECT.c: ++ * (C) 1999-2001 Paul `Rusty' Russell ++ * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org> ++ * ++ * xt_DELUDE acts like REJECT, but does reply with SYN-ACK on SYN. ++ * ++ * 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/module.h> +#include <linux/skbuff.h> +#include <linux/ip.h> -+#include <linux/random.h> +#include <linux/tcp.h> -+#include <linux/udp.h> -+#include <linux/icmp.h> -+#include <net/icmp.h> -+#include <net/ip.h> -+#include <net/tcp.h> -+#include <net/route.h> -+#include <net/dst.h> -+#include <linux/netfilter_ipv4/ip_tables.h> ++#include <linux/netfilter/x_tables.h> +#ifdef CONFIG_BRIDGE_NETFILTER +# include <linux/netfilter_bridge.h> +#endif -+#include <linux/netfilter/oot_trans.h> ++#include <net/tcp.h> +#define PFX KBUILD_MODNAME ": " + -+static inline struct rtable *route_reverse(struct sk_buff *skb, -+ struct tcphdr *tcph, int hook) ++static void delude_send_reset(struct sk_buff *oldskb, unsigned int hook) +{ -+ struct iphdr *iph = ip_hdr(skb); -+ struct dst_entry *odst; -+ struct flowi fl = {}; -+ struct rtable *rt; -+ -+ /* We don't require ip forwarding to be enabled to be able to -+ * send a RST reply for bridged traffic. */ -+ if (hook != NF_IP_FORWARD -+#ifdef CONFIG_BRIDGE_NETFILTER -+ || (skb->nf_bridge && skb->nf_bridge->mask & BRNF_BRIDGED) -+#endif -+ ) { -+ fl.nl_u.ip4_u.daddr = iph->saddr; -+ if (hook == NF_IP_LOCAL_IN) -+ fl.nl_u.ip4_u.saddr = iph->daddr; -+ fl.nl_u.ip4_u.tos = RT_TOS(iph->tos); -+ -+ if (ip_route_output_key(&rt, &fl) != 0) -+ return NULL; -+ } else { -+ /* non-local src, find valid iif to satisfy -+ * rp-filter when calling ip_route_input. */ -+ fl.nl_u.ip4_u.daddr = iph->daddr; -+ if (ip_route_output_key(&rt, &fl) != 0) -+ return NULL; -+ -+ odst = skb->dst; -+ if (ip_route_input(skb, iph->saddr, iph->daddr, -+ RT_TOS(iph->tos), rt->u.dst.dev) != 0) { -+ dst_release(&rt->u.dst); -+ return NULL; -+ } -+ dst_release(&rt->u.dst); -+ rt = (struct rtable *)skb->dst; -+ skb->dst = odst; -+ -+ fl.nl_u.ip4_u.daddr = iph->saddr; -+ fl.nl_u.ip4_u.saddr = iph->daddr; -+ fl.nl_u.ip4_u.tos = RT_TOS(iph->tos); -+ } -+ -+ if (rt->u.dst.error) { -+ dst_release(&rt->u.dst); -+ return NULL; -+ } -+ -+ fl.proto = IPPROTO_TCP; -+ fl.fl_ip_sport = tcph->dest; -+ fl.fl_ip_dport = tcph->source; -+ -+ xfrm_lookup((struct dst_entry **)&rt, &fl, NULL, 0); -+ -+ return rt; -+} -+ -+static void send_reset(struct sk_buff *oldskb, int hook) -+{ -+ struct sk_buff *nskb; -+ struct iphdr *iph = ip_hdr(oldskb); + struct tcphdr _otcph, *oth, *tcph; -+ __be16 tmp_port; -+ __be32 tmp_addr; -+ int needs_ack; + unsigned int addr_type; ++ struct sk_buff *nskb; ++ u_int16_t tmp_port; ++ u_int32_t tmp_addr; ++ struct iphdr *niph; ++ bool needs_ack; + + /* IP header checks: fragment. */ -+ if (iph->frag_off & htons(IP_OFFSET)) ++ if (ip_hdr(oldskb)->frag_off & htons(IP_OFFSET)) + return; + + oth = skb_header_pointer(oldskb, ip_hdrlen(oldskb), @@ -518,78 +443,75 @@ Index: linux-2.6.23/net/netfilter/xt_DELUDE.c + + /* This packet will not be the same as the other: clear nf fields */ + nf_reset(nskb); -+ nskb->nfmark = 0; ++ nskb->mark = 0; + skb_init_secmark(nskb); + + skb_shinfo(nskb)->gso_size = 0; + skb_shinfo(nskb)->gso_segs = 0; + skb_shinfo(nskb)->gso_type = 0; + -+ tcph = tcp_hdr(nskb); ++ tcph = (struct tcphdr *)(skb_network_header(nskb) + ip_hdrlen(nskb)); + + /* Swap source and dest */ -+ tmp_addr = ip_hdr(nskb)->saddr; -+ ip_hdr(nskb)->saddr = ip_hdr(nskb)->daddr; -+ ip_hdr(nskb)->daddr = tmp_addr; -+ tmp_port = tcph->source; ++ niph = ip_hdr(nskb); ++ tmp_addr = niph->saddr; ++ niph->saddr = niph->daddr; ++ niph->daddr = tmp_addr; ++ tmp_port = tcph->source; + tcph->source = tcph->dest; -+ tcph->dest = tmp_port; ++ tcph->dest = tmp_port; + + /* Truncate to length (no data) */ -+ tcph->doff = sizeof(struct tcphdr)/4; ++ tcph->doff = sizeof(struct tcphdr) / 4; + skb_trim(nskb, ip_hdrlen(nskb) + sizeof(struct tcphdr)); -+ ip_hdr(nskb)->tot_len = htons(nskb->len); ++ niph->tot_len = htons(nskb->len); + -+ if(oth->syn && !oth->ack && !oth->rst && !oth->fin) { ++ if (oth->syn && !oth->ack && !oth->rst && !oth->fin) { + /* DELUDE essential part */ + tcph->ack_seq = htonl(ntohl(oth->seq) + oth->syn + oth->fin + + oldskb->len - ip_hdrlen(oldskb) - + (oth->doff << 2)); -+ tcph->seq = htonl(secure_tcp_sequence_number( -+ ip_hdr(nskb)->saddr, ip_hdr(nskb)->daddr, -+ tcph->source, tcph->dest)); -+ tcph->ack = 1; ++ tcph->seq = false; ++ tcph->ack = true; + } else { -+ if(!tcph->ack) { -+ needs_ack = 1; -+ tcph->ack_seq = htonl(ntohl(oth->seq) + oth->syn + oth->fin -+ + oldskb->len - ip_hdrlen(oldskb) -+ - (oth->doff<<2)); -+ tcph->seq = 0; ++ if (!tcph->ack) { ++ needs_ack = true; ++ tcph->ack_seq = htonl(ntohl(oth->seq) + oth->syn + ++ oth->fin + oldskb->len - ++ ip_hdrlen(oldskb) - (oth->doff<<2)); ++ tcph->seq = false; + } else { -+ needs_ack = 0; -+ tcph->seq = oth->ack_seq; -+ tcph->ack_seq = 0; ++ needs_ack = false; ++ tcph->seq = oth->ack_seq; ++ tcph->ack_seq = false; + } + + /* Reset flags */ + ((u_int8_t *)tcph)[13] = 0; -+ tcph->rst = 1; ++ tcph->rst = true; + tcph->ack = needs_ack; + } + -+ -+ tcph->window = 0; ++ tcph->window = 0; + tcph->urg_ptr = 0; + + /* Adjust TCP checksum */ + tcph->check = 0; -+ tcph->check = tcp_v4_check(tcph, sizeof(struct tcphdr), -+ ip_hdr(nskb)->saddr, -+ ip_hdr(nskb)->daddr, -+ csum_partial((char *)tcph, -+ sizeof(struct tcphdr), 0)); ++ tcph->check = tcp_v4_check(sizeof(struct tcphdr), niph->saddr, ++ niph->daddr, csum_partial((char *)tcph, ++ sizeof(struct tcphdr), 0)); + + /* Set DF, id = 0 */ -+ ip_hdr(nskb)->frag_off = htons(IP_DF); -+ ip_hdr(nskb)->id = 0; ++ niph->frag_off = htons(IP_DF); ++ niph->id = 0; + + addr_type = RTN_UNSPEC; -+ if (hook != NF_IP_FORWARD +#ifdef CONFIG_BRIDGE_NETFILTER -+ || (nskb->nf_bridge && nskb->nf_bridge->mask & BRNF_BRIDGED) ++ if (hook != NF_IP_FORWARD || (nskb->nf_bridge != NULL && ++ nskb->nf_bridge->mask & BRNF_BRIDGED)) ++#else ++ if (hook != NF_IP_FORWARD) +#endif -+ ) + addr_type = RTN_LOCAL; + + if (ip_route_me_harder(&nskb, addr_type)) @@ -598,12 +520,11 @@ Index: linux-2.6.23/net/netfilter/xt_DELUDE.c + nskb->ip_summed = CHECKSUM_NONE; + + /* Adjust IP TTL */ -+ ip_hdr(nskb)->ttl = dst_metric(nskb->dst, RTAX_HOPLIMIT); ++ niph->ttl = dst_metric(nskb->dst, RTAX_HOPLIMIT); + + /* Adjust IP checksum */ -+ ip_hdr(nskb)->check = 0; -+ ip_hdr(nskb)->check = ip_fast_csum((unsigned char *)ip_hdr(nskb), -+ ip_hdr(nskb)->ihl); ++ niph->check = 0; ++ niph->check = ip_fast_csum(skb_network_header(nskb), niph->ihl); + + /* "Never happens" */ + if (nskb->len > dst_mtu(nskb->dst)) @@ -619,78 +540,57 @@ Index: linux-2.6.23/net/netfilter/xt_DELUDE.c + kfree_skb(nskb); +} + -+static unsigned int xt_delude_target(struct sk_buff **pskb, ++static unsigned int delude_tg(struct sk_buff **pskb, + const struct net_device *in, const struct net_device *out, -+ unsigned int hooknum, const struct xt_target *target, const void *targinfo -+#ifdef HAVE_TARGUSERINFO -+ , -+ void *userinfo -+#endif -+ ) ++ unsigned int hooknum, const struct xt_target *target, const void *targinfo) +{ + /* WARNING: This code causes reentry within iptables. + This means that the iptables jump stack is now crap. We + must return an absolute verdict. --RR */ -+ send_reset(*pskb, hooknum); ++ delude_send_reset(*pskb, hooknum); + return NF_DROP; +} + -+static bool xt_delude_check(const char *tablename, const void *e_void, -+ const struct xt_target *target, void *targinfo, -+#ifdef HAVE_TARGINFOSIZE -+ unsigned int targinfosize, -+#endif -+ unsigned int hook_mask) -+{ -+ if(hook_mask & ~((1 << NF_IP_LOCAL_IN) | (1 << NF_IP_FORWARD))) { -+ printk(KERN_WARNING PFX "DELUDE may not be used in chains " -+ "other than INPUT and FORWARD\n"); -+ return false; -+ } -+ return true; -+} -+ -+static struct xt_target xt_delude_info = { ++static struct xt_target delude_tg_reg = { + .name = "DELUDE", -+ .target = xt_delude_target, -+ .checkentry = xt_delude_check, ++ .family = AF_INET, + .table = "filter", -+ .hooks = (1 << NF_IP_LOCAL_IN) | (1 << NF_IP_FORWARD) | -+ (1 << NF_IP_LOCAL_OUT), ++ .hooks = (1 << NF_IP_LOCAL_IN) | (1 << NF_IP_FORWARD), ++ .target = delude_tg, + .proto = IPPROTO_TCP, -+ .family = AF_INET, + .me = THIS_MODULE, +}; + -+static int __init xt_delude_init(void) ++static int __init delude_tg_init(void) +{ -+ return xt_register_target(&xt_delude_info); ++ return xt_register_target(&delude_tg_reg); +} + -+static void __exit xt_delude_exit(void) ++static void __exit delude_tg_exit(void) +{ -+ xt_unregister_target(&xt_delude_info); ++ xt_unregister_target(&delude_tg_reg); +} + -+module_init(xt_delude_init); -+module_exit(xt_delude_exit); -+MODULE_AUTHOR("Jan Engelhardt <jengelh@gmx.de>"); -+MODULE_DESCRIPTION("netfilter DELUDE target"); ++module_init(delude_tg_init); ++module_exit(delude_tg_exit); ++MODULE_AUTHOR("Jan Engelhardt <jengelh@computergmbh.de>"); ++MODULE_DESCRIPTION("netfilter \"DELUDE\" target"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("ipt_DELUDE"); -Index: linux-2.6.23/net/netfilter/xt_portscan.c +Index: linux-2.6.23.16/net/netfilter/xt_portscan.c =================================================================== ---- /dev/null 1970-01-01 00:00:00.000000000 +0000 -+++ linux-2.6.23/net/netfilter/xt_portscan.c 2007-10-10 13:52:59.000000000 +0800 -@@ -0,0 +1,272 @@ +--- /dev/null ++++ linux-2.6.23.16/net/netfilter/xt_portscan.c +@@ -0,0 +1,269 @@ +/* -+ portscan match for netfilter -+ -+ Written by Jan Engelhardt, 2006 - 2007 -+ 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. -+*/ ++ * portscan match for netfilter ++ * Copyright © CC Computer Consultants GmbH, 2006 - 2007 ++ * Contact: Jan Engelhardt <jengelh@computergmbh.de> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License; either version ++ * 2 or 3 as published by the Free Software Foundation. ++ */ +#include <linux/in.h> +#include <linux/ip.h> +#include <linux/module.h> @@ -702,9 +602,15 @@ Index: linux-2.6.23/net/netfilter/xt_portscan.c +#include <linux/version.h> +#include <linux/netfilter/x_tables.h> +#include <linux/netfilter/xt_tcpudp.h> -+#include <linux/netfilter/oot_conntrack.h> -+#include <linux/netfilter/xt_portscan.h> -+#include <linux/netfilter/oot_trans.h> ++#include <net/netfilter/nf_nat_rule.h> ++#if defined(_LOCAL) ++# include "xt_portscan.h" ++#elif defined(CONFIG_NETFILTER_XT_MATCH_PORTSCAN) || \ ++ defined(CONFIG_NETFILTER_XT_MATCH_PORTSCAN_MODULE) ++# include <linux/netfilter/xt_portscan.h> ++#else ++# include "xt_portscan.h" ++#endif +#define PFX KBUILD_MODNAME ": " + +enum { @@ -751,55 +657,55 @@ Index: linux-2.6.23/net/netfilter/xt_portscan.c +MODULE_PARM_DESC(mark_valid, "connmark value for Valid state"); + +/* TCP flag functions */ -+static inline int tflg_ack4(const struct tcphdr *th) ++static inline bool tflg_ack4(const struct tcphdr *th) +{ + return (tcp_flag_word(th) & TCP_FLAGS_ALL4) == TCP_FLAG_ACK; +} + -+static inline int tflg_ack6(const struct tcphdr *th) ++static inline bool tflg_ack6(const struct tcphdr *th) +{ + return (tcp_flag_word(th) & TCP_FLAGS_ALL6) == TCP_FLAG_ACK; +} + -+static inline int tflg_fin(const struct tcphdr *th) ++static inline bool tflg_fin(const struct tcphdr *th) +{ + return (tcp_flag_word(th) & TCP_FLAGS_ALL3) == TCP_FLAG_FIN; +} + -+static inline int tflg_rst(const struct tcphdr *th) ++static inline bool tflg_rst(const struct tcphdr *th) +{ + return (tcp_flag_word(th) & TCP_FLAGS_ALL3) == TCP_FLAG_RST; +} + -+static inline int tflg_rstack(const struct tcphdr *th) ++static inline bool tflg_rstack(const struct tcphdr *th) +{ + return (tcp_flag_word(th) & TCP_FLAGS_ALL4) == + (TCP_FLAG_ACK | TCP_FLAG_RST); +} + -+static inline int tflg_syn(const struct tcphdr *th) ++static inline bool tflg_syn(const struct tcphdr *th) +{ + return (tcp_flag_word(th) & TCP_FLAGS_ALL4) == TCP_FLAG_SYN; +} + -+static inline int tflg_synack(const struct tcphdr *th) ++static inline bool tflg_synack(const struct tcphdr *th) +{ + return (tcp_flag_word(th) & TCP_FLAGS_ALL4) == + (TCP_FLAG_SYN | TCP_FLAG_ACK); +} + +/* portscan functions */ -+static inline int xt_portscan_stealth(const struct tcphdr *th) ++static inline bool portscan_mt_stealth(const struct tcphdr *th) +{ + /* + * "Connection refused" replies to our own probes must not be matched. + */ -+ if(tflg_rstack(th)) -+ return 0; ++ if (tflg_rstack(th)) ++ return false; + -+ if(tflg_rst(th) && printk_ratelimit()) { ++ if (tflg_rst(th) && printk_ratelimit()) { + printk(KERN_WARNING PFX "Warning: Pure RST received\n"); -+ return 0; ++ return false; + } + + /* @@ -811,42 +717,43 @@ Index: linux-2.6.23/net/netfilter/xt_portscan.c + return !tflg_syn(th); +} + -+static inline int xt_portscan_full(int mark, enum ip_conntrack_info ctstate, -+ int loopback, const struct tcphdr *tcph, int payload_len) ++static inline unsigned int portscan_mt_full(int mark, ++ enum ip_conntrack_info ctstate, bool loopback, const struct tcphdr *tcph, ++ unsigned int payload_len) +{ -+ if(mark == mark_estab2) { ++ if (mark == mark_estab2) { + /* + * -m connmark --mark $ESTAB2 + */ -+ if(tflg_ack4(tcph) && payload_len == 0) ++ if (tflg_ack4(tcph) && payload_len == 0) + return mark; /* keep mark */ -+ else if(tflg_rst(tcph) || tflg_fin(tcph)) ++ else if (tflg_rst(tcph) || tflg_fin(tcph)) + return mark_grscan; + else + return mark_valid; -+ } else if(mark == mark_estab1) { ++ } else if (mark == mark_estab1) { + /* + * -m connmark --mark $ESTAB1 + */ -+ if(tflg_rst(tcph) || tflg_fin(tcph)) ++ if (tflg_rst(tcph) || tflg_fin(tcph)) + return mark_cnscan; -+ else if(!loopback && tflg_ack4(tcph) && payload_len == 0) ++ else if (!loopback && tflg_ack4(tcph) && payload_len == 0) + return mark_estab2; + else + return mark_valid; -+ } else if(mark == mark_synrcv) { ++ } else if (mark == mark_synrcv) { + /* + * -m connmark --mark $SYN + */ -+ if(loopback && tflg_synack(tcph)) ++ if (loopback && tflg_synack(tcph)) + return mark; /* keep mark */ -+ else if(loopback && tflg_rstack(tcph)) ++ else if (loopback && tflg_rstack(tcph)) + return mark_closed; -+ else if(tflg_ack6(tcph)) ++ else if (tflg_ack6(tcph)) + return mark_estab1; + else + return mark_synscan; -+ } else if(ctstate == IP_CT_NEW && tflg_syn(tcph)) { ++ } else if (ctstate == IP_CT_NEW && tflg_syn(tcph)) { + /* + * -p tcp --syn --ctstate NEW + */ @@ -855,25 +762,25 @@ Index: linux-2.6.23/net/netfilter/xt_portscan.c + return mark; +} + -+static bool xt_portscan_match(const struct sk_buff *skb, ++static bool portscan_mt(const struct sk_buff *skb, + const struct net_device *in, const struct net_device *out, + const struct xt_match *match, const void *matchinfo, int offset, + unsigned int protoff, bool *hotdrop) +{ -+ const struct xt_portscan_info *info = matchinfo; ++ const struct xt_portscan_match_info *info = matchinfo; + enum ip_conntrack_info ctstate; -+ struct nf_conn *ctdata; + const struct tcphdr *tcph; ++ struct nf_conn *ctdata; + struct tcphdr tcph_buf; + + tcph = skb_header_pointer(skb, protoff, sizeof(tcph_buf), &tcph_buf); -+ if(tcph == NULL) ++ if (tcph == NULL) + return false; + + /* Check for invalid packets: -m conntrack --ctstate INVALID */ -+ if((ctdata = nf_ct_get(skb, &ctstate)) == NULL) { -+ if(info->match_stealth) -+ return xt_portscan_stealth(tcph); ++ if ((ctdata = nf_ct_get(skb, &ctstate)) == NULL) { ++ if (info->match_stealth) ++ return portscan_mt_stealth(tcph); + /* + * If @ctdata is NULL, we cannot match the other scan + * types, return. @@ -886,17 +793,17 @@ Index: linux-2.6.23/net/netfilter/xt_portscan.c + * simulate must not be run through again. And for speedup, do not call + * it either when the connection is already VALID. + */ -+ if((ctdata->mark & connmark_mask) == mark_valid || -+ (skb->nfmark & packet_mask) != mark_seen) -+ { ++ if ((ctdata->mark & connmark_mask) == mark_valid || ++ (skb->mark & packet_mask) != mark_seen) { + unsigned int n; -+ n = xt_portscan_full(ctdata->mark & connmark_mask, ctstate, ++ ++ n = portscan_mt_full(ctdata->mark & connmark_mask, ctstate, + in == &loopback_dev, tcph, + skb->len - protoff - 4 * tcph->doff); + + ctdata->mark = (ctdata->mark & ~connmark_mask) | n; -+ ((struct sk_buff *)skb)->nfmark = -+ (skb->nfmark & ~packet_mask) | mark_seen; ++ ((struct sk_buff *)skb)->mark = ++ (skb->mark & ~packet_mask) ^ mark_seen; + } + + return (info->match_syn && ctdata->mark == mark_synscan) || @@ -904,62 +811,51 @@ Index: linux-2.6.23/net/netfilter/xt_portscan.c + (info->match_gr && ctdata->mark == mark_grscan); +} + -+static bool xt_portscan_checkentry(const char *tablename, const void *entry, -+ const struct xt_match *match, void *matchinfo, -+#ifdef HAVE_MATCHINFOSIZE -+ unsigned int matchinfosize, -+#endif -+ unsigned int hook_mask) ++static bool portscan_mt_check(const char *tablename, const void *entry, ++ const struct xt_match *match, void *matchinfo, unsigned int hook_mask) +{ -+ const struct xt_portscan_info *info = matchinfo; -+#ifdef HAVE_MATCHINFOSIZE -+ if(matchinfosize != XT_ALIGN(sizeof(struct xt_portscan_info))) { -+ printk(KERN_WARNING PFX "matchinfosize %u != %Zu\n", -+ matchinfosize, -+ XT_ALIGN(sizeof(struct xt_portscan_info))); -+ return false; -+ } -+#endif -+ if((info->match_stealth & ~1) || (info->match_syn & ~1) || -+ (info->match_cn & ~1) || (info->match_gr & ~1)) { ++ const struct xt_portscan_match_info *info = matchinfo; ++ ++ if ((info->match_stealth & ~1) || (info->match_syn & ~1) || ++ (info->match_cn & ~1) || (info->match_gr & ~1)) { + printk(KERN_WARNING PFX "Invalid flags\n"); + return false; + } + return true; +} + -+static struct xt_match xt_portscan = { ++static struct xt_match portscan_mt_reg __read_mostly = { + .name = "portscan", -+ .match = xt_portscan_match, -+ .checkentry = xt_portscan_checkentry, -+ .matchsize = sizeof(struct xt_portscan_info), -+ .proto = IPPROTO_TCP, + .family = AF_INET, ++ .match = portscan_mt, ++ .checkentry = portscan_mt_check, ++ .matchsize = sizeof(struct xt_portscan_match_info), ++ .proto = IPPROTO_TCP, + .me = THIS_MODULE, +}; + -+static int __init xt_portscan_init(void) ++static int __init portscan_mt_init(void) +{ -+ return xt_register_match(&xt_portscan); ++ return xt_register_match(&portscan_mt_reg); +} + -+static void __exit xt_portscan_exit(void) ++static void __exit portscan_mt_exit(void) +{ -+ xt_unregister_match(&xt_portscan); ++ xt_unregister_match(&portscan_mt_reg); + return; +} + -+module_init(xt_portscan_init); -+module_exit(xt_portscan_exit); -+MODULE_AUTHOR("Jan Engelhardt <jengelh@gmx.de>"); -+MODULE_DESCRIPTION("netfilter portscan match module"); ++module_init(portscan_mt_init); ++module_exit(portscan_mt_exit); ++MODULE_AUTHOR("Jan Engelhardt <jengelh@computergmbh.de>"); ++MODULE_DESCRIPTION("netfilter \"portscan\" match"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("ipt_portscan"); -Index: linux-2.6.23/drivers/char/random.c +Index: linux-2.6.23.16/drivers/char/random.c =================================================================== ---- linux-2.6.23.orig/drivers/char/random.c 2007-10-10 04:31:38.000000000 +0800 -+++ linux-2.6.23/drivers/char/random.c 2007-10-10 13:52:59.000000000 +0800 -@@ -1564,6 +1564,8 @@ +--- linux-2.6.23.16.orig/drivers/char/random.c ++++ linux-2.6.23.16/drivers/char/random.c +@@ -1564,6 +1564,8 @@ __u32 secure_tcp_sequence_number(__be32 return seq; } diff --git a/target/linux/generic-2.6/patches-2.6.23/171-netfilter_tarpit.patch b/target/linux/generic-2.6/patches-2.6.23/171-netfilter_tarpit.patch index 058dda5..073951a 100644 --- a/target/linux/generic-2.6/patches-2.6.23/171-netfilter_tarpit.patch +++ b/target/linux/generic-2.6/patches-2.6.23/171-netfilter_tarpit.patch @@ -1,7 +1,7 @@ -Index: linux-2.6.23/net/netfilter/Kconfig +Index: linux-2.6.23.16/net/netfilter/Kconfig =================================================================== ---- linux-2.6.23.orig/net/netfilter/Kconfig -+++ linux-2.6.23/net/netfilter/Kconfig +--- linux-2.6.23.16.orig/net/netfilter/Kconfig ++++ linux-2.6.23.16/net/netfilter/Kconfig @@ -401,6 +401,23 @@ config NETFILTER_XT_TARGET_CONNSECMARK To compile it as a module, choose M here. If unsure, say N. @@ -26,22 +26,22 @@ Index: linux-2.6.23/net/netfilter/Kconfig config NETFILTER_XT_TARGET_TCPMSS tristate '"TCPMSS" target support' depends on NETFILTER_XTABLES && (IPV6 || IPV6=n) -Index: linux-2.6.23/net/netfilter/Makefile +Index: linux-2.6.23.16/net/netfilter/Makefile =================================================================== ---- linux-2.6.23.orig/net/netfilter/Makefile -+++ linux-2.6.23/net/netfilter/Makefile -@@ -49,6 +49,7 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_NFLOG) +--- linux-2.6.23.16.orig/net/netfilter/Makefile ++++ linux-2.6.23.16/net/netfilter/Makefile +@@ -47,6 +47,7 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_NFLOG) obj-$(CONFIG_NETFILTER_XT_TARGET_NOTRACK) += xt_NOTRACK.o obj-$(CONFIG_NETFILTER_XT_TARGET_TRACE) += xt_TRACE.o obj-$(CONFIG_NETFILTER_XT_TARGET_SECMARK) += xt_SECMARK.o +obj-$(CONFIG_NETFILTER_XT_TARGET_TARPIT) += xt_TARPIT.o obj-$(CONFIG_NETFILTER_XT_TARGET_TCPMSS) += xt_TCPMSS.o obj-$(CONFIG_NETFILTER_XT_TARGET_CONNSECMARK) += xt_CONNSECMARK.o - -Index: linux-2.6.23/net/netfilter/xt_TARPIT.c + obj-$(CONFIG_NETFILTER_XT_TARGET_CHAOS) += xt_CHAOS.o +Index: linux-2.6.23.16/net/netfilter/xt_TARPIT.c =================================================================== --- /dev/null -+++ linux-2.6.23/net/netfilter/xt_TARPIT.c ++++ linux-2.6.23.16/net/netfilter/xt_TARPIT.c @@ -0,0 +1,280 @@ +/* + * Kernel module to capture and hold incoming TCP connections using |