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netfilter: add support for raw table and NOTRACK target (#5504)

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SVN-Revision: 19721
This commit is contained in:
Jo-Philipp Wich 2010-02-19 01:36:47 +00:00
parent 31cfd93be4
commit 15c4e22d31
3 changed files with 711 additions and 0 deletions
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1
include/netfilter.mk
View file

@ -91,6 +91,7 @@ $(eval $(if $(NF_KMOD),$(call nf_add,IPT_CONNTRACK,CONFIG_NF_CONNTRACK_IPV4, $(P
$(eval $(call nf_add,IPT_CONNTRACK,CONFIG_IP_NF_MATCH_STATE, $(P_V4)ipt_state))
$(eval $(call nf_add,IPT_CONNTRACK,CONFIG_NETFILTER_XT_MATCH_STATE, $(P_XT)xt_state))
$(eval $(call nf_add,IPT_CONNTRACK,CONFIG_IP_NF_RAW, $(P_V4)iptable_raw))
$(eval $(call nf_add,IPT_CONNTRACK,CONFIG_IP_NF_TARGET_NOTRACK, $(P_V4)ipt_NOTRACK))
$(eval $(call nf_add,IPT_CONNTRACK,CONFIG_NETFILTER_XT_TARGET_NOTRACK, $(P_XT)xt_NOTRACK))

3
target/linux/generic-2.4/config-default
View file

@ -203,6 +203,7 @@ CONFIG_IP6_NF_MATCH_OWNER=m
CONFIG_IP6_NF_MATCH_RANDOM=m
# CONFIG_IP6_NF_MATCH_RT is not set
# CONFIG_IP6_NF_QUEUE is not set
CONFIG_IP6_NF_RAW=m
CONFIG_IP6_NF_TARGET_IMQ=m
CONFIG_IP6_NF_TARGET_LOG=m
CONFIG_IP6_NF_TARGET_MARK=m
@ -277,6 +278,7 @@ CONFIG_IP_NF_NAT_SNMP_BASIC=m
CONFIG_IP_NF_NAT_TFTP=m
CONFIG_IP_NF_PPTP=m
CONFIG_IP_NF_QUEUE=m
CONFIG_IP_NF_RAW=m
CONFIG_IP_NF_RTSP=m
CONFIG_IP_NF_SET_HASHSIZE=1024
CONFIG_IP_NF_SET_IPHASH=m
@ -297,6 +299,7 @@ CONFIG_IP_NF_TARGET_MARK=m
CONFIG_IP_NF_TARGET_MASQUERADE=m
CONFIG_IP_NF_TARGET_MIRROR=m
CONFIG_IP_NF_TARGET_NETMAP=m
CONFIG_IP_NF_TARGET_NOTRACK=m
CONFIG_IP_NF_TARGET_REDIRECT=m
CONFIG_IP_NF_TARGET_REJECT=m
CONFIG_IP_NF_TARGET_SET=m

707
target/linux/generic-2.4/patches/628-netfilter_raw.patch Normal file
View file

@ -0,0 +1,707 @@
--- a/Documentation/Configure.help
+++ b/Documentation/Configure.help
@@ -3057,6 +3057,34 @@
If you want to compile it as a module, say M here and read
<file:Documentation/modules.txt>. If unsure, say `N'.
+raw table support (required for NOTRACK/TRACE)
+CONFIG_IP_NF_RAW
+ This option adds a `raw' table to iptables. This table is the very
+ first in the netfilter framework and hooks in at the PREROUTING
+ and OUTPUT chains.
+
+ If you want to compile it as a module, say M here and read
+ <file:Documentation/modules.txt>. If unsure, say `N'.
+
+NOTRACK target support
+CONFIG_IP_NF_TARGET_NOTRACK
+ The NOTRACK target allows a select rule to specify
+ which packets *not* to enter the conntrack/NAT
+ subsystem with all the consequences (no ICMP error tracking,
+ no protocol helpers for the selected packets).
+
+ If you want to compile it as a module, say M here and read
+ <file:Documentation/modules.txt>. If unsure, say `N'.
+
+raw table support (required for TRACE)
+CONFIG_IP6_NF_RAW
+ This option adds a `raw' table to ip6tables. This table is the very
+ first in the netfilter framework and hooks in at the PREROUTING
+ and OUTPUT chains.
+
+ If you want to compile it as a module, say M here and read
+ <file:Documentation/modules.txt>. If unsure, say `N'.
+
REJECT target support
CONFIG_IP_NF_TARGET_REJECT
The REJECT target allows a filtering rule to specify that an ICMP
--- a/include/linux/netfilter_ipv4/ip_conntrack.h
+++ b/include/linux/netfilter_ipv4/ip_conntrack.h
@@ -286,6 +286,9 @@
/* Call me when a conntrack is destroyed. */
extern void (*ip_conntrack_destroyed)(struct ip_conntrack *conntrack);
+/* Fake conntrack entry for untracked connections */
+extern struct ip_conntrack ip_conntrack_untracked;
+
/* Returns new sk_buff, or NULL */
struct sk_buff *
ip_ct_gather_frags(struct sk_buff *skb, u_int32_t user);
--- a/include/linux/netfilter_ipv4/ipt_conntrack.h
+++ b/include/linux/netfilter_ipv4/ipt_conntrack.h
@@ -10,6 +10,7 @@
#define IPT_CONNTRACK_STATE_SNAT (1 << (IP_CT_NUMBER + 1))
#define IPT_CONNTRACK_STATE_DNAT (1 << (IP_CT_NUMBER + 2))
+#define IPT_CONNTRACK_STATE_UNTRACKED (1 << (IP_CT_NUMBER + 3))
/* flags, invflags: */
#define IPT_CONNTRACK_STATE 0x01
--- a/include/linux/netfilter_ipv4/ipt_state.h
+++ b/include/linux/netfilter_ipv4/ipt_state.h
@@ -4,6 +4,8 @@
#define IPT_STATE_BIT(ctinfo) (1 << ((ctinfo)%IP_CT_IS_REPLY+1))
#define IPT_STATE_INVALID (1 << 0)
+#define IPT_STATE_UNTRACKED (1 << (IP_CT_NUMBER + 1))
+
struct ipt_state_info
{
unsigned int statemask;
--- a/include/linux/netfilter_ipv4.h
+++ b/include/linux/netfilter_ipv4.h
@@ -51,6 +51,8 @@
enum nf_ip_hook_priorities {
NF_IP_PRI_FIRST = INT_MIN,
+ NF_IP_PRI_CONNTRACK_DEFRAG = -400,
+ NF_IP_PRI_RAW = -300,
NF_IP_PRI_CONNTRACK = -200,
NF_IP_PRI_MANGLE = -150,
NF_IP_PRI_NAT_DST = -100,
--- a/net/ipv4/netfilter/Config.in
+++ b/net/ipv4/netfilter/Config.in
@@ -153,6 +153,15 @@
dep_tristate ' TTL target support' CONFIG_IP_NF_TARGET_TTL $CONFIG_IP_NF_IPTABLES
dep_tristate ' ULOG target support' CONFIG_IP_NF_TARGET_ULOG $CONFIG_IP_NF_IPTABLES
dep_tristate ' TCPMSS target support' CONFIG_IP_NF_TARGET_TCPMSS $CONFIG_IP_NF_IPTABLES
+ if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ tristate ' raw table support (required for NOTRACK/TRACE)' CONFIG_IP_NF_RAW $CONFIG_IP_NF_IPTABLES
+ fi
+ if [ "$CONFIG_IP_NF_RAW" != "n" ]; then
+ if [ "$CONFIG_IP_NF_CONNTRACK" != "n" ]; then
+ dep_tristate ' NOTRACK target support' CONFIG_IP_NF_TARGET_NOTRACK $CONFIG_IP_NF_RAW
+ fi
+ # Marker for TRACE target
+ fi
fi
tristate 'ARP tables support' CONFIG_IP_NF_ARPTABLES
--- a/net/ipv4/netfilter/ip_conntrack_core.c
+++ b/net/ipv4/netfilter/ip_conntrack_core.c
@@ -64,6 +64,7 @@
static atomic_t ip_conntrack_count = ATOMIC_INIT(0);
struct list_head *ip_conntrack_hash;
static kmem_cache_t *ip_conntrack_cachep;
+struct ip_conntrack ip_conntrack_untracked;
static LIST_HEAD(unconfirmed);
extern struct ip_conntrack_protocol ip_conntrack_generic_protocol;
@@ -834,6 +835,15 @@
int set_reply;
int ret;
+ /* Never happen */
+ if ((*pskb)->nh.iph->frag_off & htons(IP_OFFSET)) {
+ if (net_ratelimit()) {
+ printk(KERN_ERR "ip_conntrack_in: Frag of proto %u (hook=%u)\n",
+ (*pskb)->nh.iph->protocol, hooknum);
+ }
+ return NF_DROP;
+ }
+
/* FIXME: Do this right please. --RR */
(*pskb)->nfcache |= NFC_UNKNOWN;
@@ -1489,6 +1499,18 @@
/* For use by ipt_REJECT */
ip_ct_attach = ip_conntrack_attach;
+
+ /* Set up fake conntrack:
+ - to never be deleted, not in any hashes */
+ atomic_set(&ip_conntrack_untracked.ct_general.use, 1);
+ /* - and look it like as a confirmed connection */
+ set_bit(IPS_CONFIRMED_BIT, &ip_conntrack_untracked.status);
+ /* - and prepare the ctinfo field for REJECT/NAT. */
+ ip_conntrack_untracked.infos[IP_CT_NEW].master =
+ ip_conntrack_untracked.infos[IP_CT_RELATED].master =
+ ip_conntrack_untracked.infos[IP_CT_RELATED + IP_CT_IS_REPLY].master =
+ &ip_conntrack_untracked.ct_general;
+
return ret;
err_free_hash:
--- a/net/ipv4/netfilter/ip_conntrack_standalone.c
+++ b/net/ipv4/netfilter/ip_conntrack_standalone.c
@@ -218,6 +218,29 @@
return ip_conntrack_confirm(*pskb);
}
+static unsigned int ip_conntrack_defrag(unsigned int hooknum,
+ struct sk_buff **pskb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ /* Previously seen (loopback)? Ignore. Do this before
+ fragment check. */
+ if ((*pskb)->nfct)
+ return NF_ACCEPT;
+
+ /* Gather fragments. */
+ if ((*pskb)->nh.iph->frag_off & htons(IP_MF|IP_OFFSET)) {
+ *pskb = ip_ct_gather_frags(*pskb,
+ hooknum == NF_IP_PRE_ROUTING ?
+ IP_DEFRAG_CONNTRACK_IN :
+ IP_DEFRAG_CONNTRACK_OUT);
+ if (!*pskb)
+ return NF_STOLEN;
+ }
+ return NF_ACCEPT;
+}
+
static unsigned int ip_refrag(unsigned int hooknum,
struct sk_buff **pskb,
const struct net_device *in,
@@ -259,9 +282,15 @@
/* Connection tracking may drop packets, but never alters them, so
make it the first hook. */
+static struct nf_hook_ops ip_conntrack_defrag_ops
+= { { NULL, NULL }, ip_conntrack_defrag, PF_INET, NF_IP_PRE_ROUTING,
+ NF_IP_PRI_CONNTRACK_DEFRAG };
static struct nf_hook_ops ip_conntrack_in_ops
= { { NULL, NULL }, ip_conntrack_in, PF_INET, NF_IP_PRE_ROUTING,
NF_IP_PRI_CONNTRACK };
+static struct nf_hook_ops ip_conntrack_defrag_local_out_ops
+= { { NULL, NULL }, ip_conntrack_defrag, PF_INET, NF_IP_LOCAL_OUT,
+ NF_IP_PRI_CONNTRACK_DEFRAG };
static struct nf_hook_ops ip_conntrack_local_out_ops
= { { NULL, NULL }, ip_conntrack_local, PF_INET, NF_IP_LOCAL_OUT,
NF_IP_PRI_CONNTRACK };
@@ -382,10 +411,20 @@
if (!proc) goto cleanup_init;
proc->owner = THIS_MODULE;
+ ret = nf_register_hook(&ip_conntrack_defrag_ops);
+ if (ret < 0) {
+ printk("ip_conntrack: can't register pre-routing defrag hook.\n");
+ goto cleanup_proc;
+ }
+ ret = nf_register_hook(&ip_conntrack_defrag_local_out_ops);
+ if (ret < 0) {
+ printk("ip_conntrack: can't register local_out defrag hook.\n");
+ goto cleanup_defragops;
+ }
ret = nf_register_hook(&ip_conntrack_in_ops);
if (ret < 0) {
printk("ip_conntrack: can't register pre-routing hook.\n");
- goto cleanup_proc;
+ goto cleanup_defraglocalops;
}
ret = nf_register_hook(&ip_conntrack_local_out_ops);
if (ret < 0) {
@@ -423,6 +462,10 @@
nf_unregister_hook(&ip_conntrack_local_out_ops);
cleanup_inops:
nf_unregister_hook(&ip_conntrack_in_ops);
+ cleanup_defraglocalops:
+ nf_unregister_hook(&ip_conntrack_defrag_local_out_ops);
+ cleanup_defragops:
+ nf_unregister_hook(&ip_conntrack_defrag_ops);
cleanup_proc:
proc_net_remove("ip_conntrack");
cleanup_init:
@@ -512,5 +555,6 @@
EXPORT_SYMBOL(ip_conntrack_expect_list);
EXPORT_SYMBOL(ip_conntrack_lock);
EXPORT_SYMBOL(ip_conntrack_hash);
+EXPORT_SYMBOL(ip_conntrack_untracked);
EXPORT_SYMBOL_GPL(ip_conntrack_find_get);
EXPORT_SYMBOL_GPL(ip_conntrack_put);
--- a/net/ipv4/netfilter/ip_nat_core.c
+++ b/net/ipv4/netfilter/ip_nat_core.c
@@ -1023,6 +1023,10 @@
/* FIXME: Man, this is a hack. <SIGH> */
IP_NF_ASSERT(ip_conntrack_destroyed == NULL);
ip_conntrack_destroyed = &ip_nat_cleanup_conntrack;
+
+ /* Initialize fake conntrack so that NAT will skip it */
+ ip_conntrack_untracked.nat.info.initialized |=
+ (1 << IP_NAT_MANIP_SRC) | (1 << IP_NAT_MANIP_DST);
return 0;
}
--- /dev/null
+++ b/net/ipv4/netfilter/iptable_raw.c
@@ -0,0 +1,149 @@
+/*
+ * 'raw' table, which is the very first hooked in at PRE_ROUTING and LOCAL_OUT .
+ *
+ * Copyright (C) 2003 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
+ */
+#include <linux/module.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+
+#define RAW_VALID_HOOKS ((1 << NF_IP_PRE_ROUTING) | (1 << NF_IP_LOCAL_OUT))
+
+/* Standard entry. */
+struct ipt_standard
+{
+ struct ipt_entry entry;
+ struct ipt_standard_target target;
+};
+
+struct ipt_error_target
+{
+ struct ipt_entry_target target;
+ char errorname[IPT_FUNCTION_MAXNAMELEN];
+};
+
+struct ipt_error
+{
+ struct ipt_entry entry;
+ struct ipt_error_target target;
+};
+
+static struct
+{
+ struct ipt_replace repl;
+ struct ipt_standard entries[2];
+ struct ipt_error term;
+} initial_table __initdata
+= { { "raw", RAW_VALID_HOOKS, 3,
+ sizeof(struct ipt_standard) * 2 + sizeof(struct ipt_error),
+ { [NF_IP_PRE_ROUTING] 0,
+ [NF_IP_LOCAL_OUT] sizeof(struct ipt_standard) },
+ { [NF_IP_PRE_ROUTING] 0,
+ [NF_IP_LOCAL_OUT] sizeof(struct ipt_standard) },
+ 0, NULL, { } },
+ {
+ /* PRE_ROUTING */
+ { { { { 0 }, { 0 }, { 0 }, { 0 }, "", "", { 0 }, { 0 }, 0, 0, 0 },
+ 0,
+ sizeof(struct ipt_entry),
+ sizeof(struct ipt_standard),
+ 0, { 0, 0 }, { } },
+ { { { { IPT_ALIGN(sizeof(struct ipt_standard_target)), "" } }, { } },
+ -NF_ACCEPT - 1 } },
+ /* LOCAL_OUT */
+ { { { { 0 }, { 0 }, { 0 }, { 0 }, "", "", { 0 }, { 0 }, 0, 0, 0 },
+ 0,
+ sizeof(struct ipt_entry),
+ sizeof(struct ipt_standard),
+ 0, { 0, 0 }, { } },
+ { { { { IPT_ALIGN(sizeof(struct ipt_standard_target)), "" } }, { } },
+ -NF_ACCEPT - 1 } }
+ },
+ /* ERROR */
+ { { { { 0 }, { 0 }, { 0 }, { 0 }, "", "", { 0 }, { 0 }, 0, 0, 0 },
+ 0,
+ sizeof(struct ipt_entry),
+ sizeof(struct ipt_error),
+ 0, { 0, 0 }, { } },
+ { { { { IPT_ALIGN(sizeof(struct ipt_error_target)), IPT_ERROR_TARGET } },
+ { } },
+ "ERROR"
+ }
+ }
+};
+
+static struct ipt_table packet_raw = {
+ .name = "raw",
+ .table = &initial_table.repl,
+ .valid_hooks = RAW_VALID_HOOKS,
+ .lock = RW_LOCK_UNLOCKED,
+ .me = THIS_MODULE
+};
+
+/* The work comes in here from netfilter.c. */
+static unsigned int
+ipt_hook(unsigned int hook,
+ struct sk_buff **pskb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ return ipt_do_table(pskb, hook, in, out, &packet_raw, NULL);
+}
+
+/* 'raw' is the very first table. */
+static struct nf_hook_ops ipt_ops[] = {
+ {
+ .hook = ipt_hook,
+ .pf = PF_INET,
+ .hooknum = NF_IP_PRE_ROUTING,
+ .priority = NF_IP_PRI_RAW
+ },
+ {
+ .hook = ipt_hook,
+ .pf = PF_INET,
+ .hooknum = NF_IP_LOCAL_OUT,
+ .priority = NF_IP_PRI_RAW
+ },
+};
+
+static int __init init(void)
+{
+ int ret;
+
+ /* Register table */
+ ret = ipt_register_table(&packet_raw);
+ if (ret < 0)
+ return ret;
+
+ /* Register hooks */
+ ret = nf_register_hook(&ipt_ops[0]);
+ if (ret < 0)
+ goto cleanup_table;
+
+ ret = nf_register_hook(&ipt_ops[1]);
+ if (ret < 0)
+ goto cleanup_hook0;
+
+ return ret;
+
+ cleanup_hook0:
+ nf_unregister_hook(&ipt_ops[0]);
+ cleanup_table:
+ ipt_unregister_table(&packet_raw);
+
+ return ret;
+}
+
+static void __exit fini(void)
+{
+ unsigned int i;
+
+ for (i = 0; i < sizeof(ipt_ops)/sizeof(struct nf_hook_ops); i++)
+ nf_unregister_hook(&ipt_ops[i]);
+
+ ipt_unregister_table(&packet_raw);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
--- a/net/ipv4/netfilter/ipt_conntrack.c
+++ b/net/ipv4/netfilter/ipt_conntrack.c
@@ -27,11 +27,13 @@
#define FWINV(bool,invflg) ((bool) ^ !!(sinfo->invflags & invflg))
- if (ct)
- statebit = IPT_CONNTRACK_STATE_BIT(ctinfo);
- else
- statebit = IPT_CONNTRACK_STATE_INVALID;
-
+ if (skb->nfct == &ip_conntrack_untracked.infos[IP_CT_NEW])
+ statebit = IPT_CONNTRACK_STATE_UNTRACKED;
+ else if (ct)
+ statebit = IPT_CONNTRACK_STATE_BIT(ctinfo);
+ else
+ statebit = IPT_CONNTRACK_STATE_INVALID;
+
if(sinfo->flags & IPT_CONNTRACK_STATE) {
if (ct) {
if(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip !=
--- /dev/null
+++ b/net/ipv4/netfilter/ipt_NOTRACK.c
@@ -0,0 +1,75 @@
+/* This is a module which is used for setting up fake conntracks
+ * on packets so that they are not seen by the conntrack/NAT code.
+ */
+#include <linux/module.h>
+#include <linux/skbuff.h>
+
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ip_conntrack.h>
+
+static unsigned int
+target(struct sk_buff **pskb,
+ unsigned int hooknum,
+ const struct net_device *in,
+ const struct net_device *out,
+ const void *targinfo,
+ void *userinfo)
+{
+ /* Previously seen (loopback)? Ignore. */
+ if ((*pskb)->nfct != NULL)
+ return IPT_CONTINUE;
+
+ /* Attach fake conntrack entry.
+ If there is a real ct entry correspondig to this packet,
+ it'll hang aroun till timing out. We don't deal with it
+ for performance reasons. JK */
+ (*pskb)->nfct = &ip_conntrack_untracked.infos[IP_CT_NEW];
+ nf_conntrack_get((*pskb)->nfct);
+
+ return IPT_CONTINUE;
+}
+
+static int
+checkentry(const char *tablename,
+ const struct ipt_entry *e,
+ void *targinfo,
+ unsigned int targinfosize,
+ unsigned int hook_mask)
+{
+ if (targinfosize != 0) {
+ printk(KERN_WARNING "NOTRACK: targinfosize %u != 0\n",
+ targinfosize);
+ return 0;
+ }
+
+ if (strcmp(tablename, "raw") != 0) {
+ printk(KERN_WARNING "NOTRACK: can only be called from \"raw\" table, not \"%s\"\n", tablename);
+ return 0;
+ }
+
+ return 1;
+}
+
+static struct ipt_target ipt_notrack_reg = {
+ .name = "NOTRACK",
+ .target = target,
+ .checkentry = checkentry,
+ .me = THIS_MODULE
+};
+
+static int __init init(void)
+{
+ if (ipt_register_target(&ipt_notrack_reg))
+ return -EINVAL;
+
+ return 0;
+}
+
+static void __exit fini(void)
+{
+ ipt_unregister_target(&ipt_notrack_reg);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
--- a/net/ipv4/netfilter/ipt_state.c
+++ b/net/ipv4/netfilter/ipt_state.c
@@ -21,7 +21,9 @@
enum ip_conntrack_info ctinfo;
unsigned int statebit;
- if (!ip_conntrack_get((struct sk_buff *)skb, &ctinfo))
+ if (skb->nfct == &ip_conntrack_untracked.infos[IP_CT_NEW])
+ statebit = IPT_STATE_UNTRACKED;
+ else if (!ip_conntrack_get((struct sk_buff *)skb, &ctinfo))
statebit = IPT_STATE_INVALID;
else
statebit = IPT_STATE_BIT(ctinfo);
--- a/net/ipv4/netfilter/Makefile
+++ b/net/ipv4/netfilter/Makefile
@@ -77,6 +77,7 @@
obj-$(CONFIG_IP_NF_FILTER) += iptable_filter.o
obj-$(CONFIG_IP_NF_MANGLE) += iptable_mangle.o
obj-$(CONFIG_IP_NF_NAT) += iptable_nat.o
+obj-$(CONFIG_IP_NF_RAW) += iptable_raw.o
# matches
obj-$(CONFIG_IP_NF_MATCH_HELPER) += ipt_helper.o
@@ -131,6 +132,7 @@
obj-$(CONFIG_IP_NF_TARGET_TTL) += ipt_TTL.o
obj-$(CONFIG_IP_NF_TARGET_ULOG) += ipt_ULOG.o
obj-$(CONFIG_IP_NF_TARGET_TCPMSS) += ipt_TCPMSS.o
+obj-$(CONFIG_IP_NF_TARGET_NOTRACK) += ipt_NOTRACK.o
# generic ARP tables
obj-$(CONFIG_IP_NF_ARPTABLES) += arp_tables.o
--- a/net/ipv6/netfilter/Config.in
+++ b/net/ipv6/netfilter/Config.in
@@ -79,6 +79,10 @@
dep_tristate ' IMQ target support' CONFIG_IP6_NF_TARGET_IMQ $CONFIG_IP6_NF_MANGLE
fi
#dep_tristate ' LOG target support' CONFIG_IP6_NF_TARGET_LOG $CONFIG_IP6_NF_IPTABLES
+ if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ tristate ' raw table support (required for TRACE)' CONFIG_IP6_NF_RAW $CONFIG_IP6_NF_IPTABLES
+ fi
+ # Marker for TRACE target
fi
endmenu
--- /dev/null
+++ b/net/ipv6/netfilter/ip6table_raw.c
@@ -0,0 +1,154 @@
+/*
+ * IPv6 raw table, a port of the IPv4 raw table to IPv6
+ *
+ * Copyright (C) 2003 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
+ */
+#include <linux/module.h>
+#include <linux/netfilter_ipv6/ip6_tables.h>
+
+#define RAW_VALID_HOOKS ((1 << NF_IP6_PRE_ROUTING) | (1 << NF_IP6_LOCAL_OUT))
+
+#if 0
+#define DEBUGP(x, args...) printk(KERN_DEBUG x, ## args)
+#else
+#define DEBUGP(x, args...)
+#endif
+
+/* Standard entry. */
+struct ip6t_standard
+{
+ struct ip6t_entry entry;
+ struct ip6t_standard_target target;
+};
+
+struct ip6t_error_target
+{
+ struct ip6t_entry_target target;
+ char errorname[IP6T_FUNCTION_MAXNAMELEN];
+};
+
+struct ip6t_error
+{
+ struct ip6t_entry entry;
+ struct ip6t_error_target target;
+};
+
+static struct
+{
+ struct ip6t_replace repl;
+ struct ip6t_standard entries[2];
+ struct ip6t_error term;
+} initial_table __initdata
+= { { "raw", RAW_VALID_HOOKS, 3,
+ sizeof(struct ip6t_standard) * 2 + sizeof(struct ip6t_error),
+ { [NF_IP6_PRE_ROUTING] 0,
+ [NF_IP6_LOCAL_OUT] sizeof(struct ip6t_standard) },
+ { [NF_IP6_PRE_ROUTING] 0,
+ [NF_IP6_LOCAL_OUT] sizeof(struct ip6t_standard) },
+ 0, NULL, { } },
+ {
+ /* PRE_ROUTING */
+ { { { { { { 0 } } }, { { { 0 } } }, { { { 0 } } }, { { { 0 } } }, "", "", { 0 }, { 0 }, 0, 0, 0 },
+ 0,
+ sizeof(struct ip6t_entry),
+ sizeof(struct ip6t_standard),
+ 0, { 0, 0 }, { } },
+ { { { { IP6T_ALIGN(sizeof(struct ip6t_standard_target)), "" } }, { } },
+ -NF_ACCEPT - 1 } },
+ /* LOCAL_OUT */
+ { { { { { { 0 } } }, { { { 0 } } }, { { { 0 } } }, { { { 0 } } }, "", "", { 0 }, { 0 }, 0, 0, 0 },
+ 0,
+ sizeof(struct ip6t_entry),
+ sizeof(struct ip6t_standard),
+ 0, { 0, 0 }, { } },
+ { { { { IP6T_ALIGN(sizeof(struct ip6t_standard_target)), "" } }, { } },
+ -NF_ACCEPT - 1 } },
+ },
+ /* ERROR */
+ { { { { { { 0 } } }, { { { 0 } } }, { { { 0 } } }, { { { 0 } } }, "", "", { 0 }, { 0 }, 0, 0, 0 },
+ 0,
+ sizeof(struct ip6t_entry),
+ sizeof(struct ip6t_error),
+ 0, { 0, 0 }, { } },
+ { { { { IP6T_ALIGN(sizeof(struct ip6t_error_target)), IP6T_ERROR_TARGET } },
+ { } },
+ "ERROR"
+ }
+ }
+};
+
+static struct ip6t_table packet_raw = {
+ .name = "raw",
+ .table = &initial_table.repl,
+ .valid_hooks = RAW_VALID_HOOKS,
+ .lock = RW_LOCK_UNLOCKED,
+ .me = THIS_MODULE
+};
+
+/* The work comes in here from netfilter.c. */
+static unsigned int
+ip6t_hook(unsigned int hook,
+ struct sk_buff **pskb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ return ip6t_do_table(pskb, hook, in, out, &packet_raw, NULL);
+}
+
+static struct nf_hook_ops ip6t_ops[] = {
+ {
+ .hook = ip6t_hook,
+ .pf = PF_INET6,
+ .hooknum = NF_IP6_PRE_ROUTING,
+ .priority = NF_IP6_PRI_FIRST
+ },
+ {
+ .hook = ip6t_hook,
+ .pf = PF_INET6,
+ .hooknum = NF_IP6_LOCAL_OUT,
+ .priority = NF_IP6_PRI_FIRST
+ },
+};
+
+static int __init init(void)
+{
+ int ret;
+
+ /* Register table */
+ ret = ip6t_register_table(&packet_raw);
+ if (ret < 0)
+ return ret;
+
+ /* Register hooks */
+ ret = nf_register_hook(&ip6t_ops[0]);
+ if (ret < 0)
+ goto cleanup_table;
+
+ ret = nf_register_hook(&ip6t_ops[1]);
+ if (ret < 0)
+ goto cleanup_hook0;
+
+ return ret;
+
+ cleanup_hook0:
+ nf_unregister_hook(&ip6t_ops[0]);
+ cleanup_table:
+ ip6t_unregister_table(&packet_raw);
+
+ return ret;
+}
+
+static void __exit fini(void)
+{
+ unsigned int i;
+
+ for (i = 0; i < sizeof(ip6t_ops)/sizeof(struct nf_hook_ops); i++)
+ nf_unregister_hook(&ip6t_ops[i]);
+
+ ip6t_unregister_table(&packet_raw);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
--- a/net/ipv6/netfilter/Makefile
+++ b/net/ipv6/netfilter/Makefile
@@ -32,6 +32,7 @@
obj-$(CONFIG_IP6_NF_TARGET_IMQ) += ip6t_IMQ.o
obj-$(CONFIG_IP6_NF_QUEUE) += ip6_queue.o
obj-$(CONFIG_IP6_NF_TARGET_LOG) += ip6t_LOG.o
+obj-$(CONFIG_IP6_NF_RAW) += ip6table_raw.o
obj-$(CONFIG_IP6_NF_MATCH_RANDOM) += ip6t_random.o
obj-$(CONFIG_IP6_NF_MATCH_HL) += ip6t_hl.o
obj-$(CONFIG_IP6_NF_TARGET_REJECT) += ip6t_REJECT.o