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-rw-r--r--net/Makefile9
-rw-r--r--net/core/dev.c1
-rw-r--r--net/core/skbuff.c10
-rw-r--r--net/ipv4/ip_gre.c2
-rw-r--r--net/ipv4/ipip.c4
-rw-r--r--net/ipv6/Config.in4
-rw-r--r--net/ipv6/netfilter/Config.in49
-rw-r--r--net/ipv6/netfilter/Makefile180
-rw-r--r--net/ipv6/netfilter/ip6_tables.c1795
-rw-r--r--net/ipv6/netfilter/ip6t_MARK.c66
-rw-r--r--net/ipv6/netfilter/ip6t_limit.c135
-rw-r--r--net/ipv6/netfilter/ip6t_mark.c50
-rw-r--r--net/ipv6/netfilter/ip6table_filter.c183
-rw-r--r--net/sunrpc/auth.c12
-rw-r--r--net/unix/af_unix.c2
15 files changed, 2490 insertions, 12 deletions
diff --git a/net/Makefile b/net/Makefile
index afdfbb712..dce68b627 100644
--- a/net/Makefile
+++ b/net/Makefile
@@ -10,7 +10,7 @@
MOD_SUB_DIRS := ipv4
ALL_SUB_DIRS := 802 ax25 bridge core ethernet ipv4 ipv6 ipx unix appletalk \
netrom rose lapb x25 wanrouter netlink sched packet sunrpc \
- econet irda decnet atm khttpd ipv4/netfilter
+ econet irda decnet atm khttpd ipv4/netfilter ipv6/netfilter
SUB_DIRS := core ethernet sched
MOD_LIST_NAME := NET_MISC_MODULES
@@ -36,9 +36,16 @@ endif
ifeq ($(CONFIG_IPV6),y)
SUB_DIRS += ipv6
+ifeq ($(CONFIG_NETFILTER),y)
+SUB_DIRS += ipv6/netfilter
+MOD_SUB_DIRS += ipv6/netfilter
+endif
else
ifeq ($(CONFIG_IPV6),m)
MOD_SUB_DIRS += ipv6
+ ifeq ($(CONFIG_NETFILTER),y)
+ MOD_SUB_DIRS += ipv6/netfilter
+ endif
endif
endif
diff --git a/net/core/dev.c b/net/core/dev.c
index ff5ff69dd..bd3670a93 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -79,7 +79,6 @@
#include <linux/brlock.h>
#include <net/sock.h>
#include <linux/rtnetlink.h>
-#include <net/slhc.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/if_bridge.h>
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 234e9c182..173506c3d 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -4,7 +4,7 @@
* Authors: Alan Cox <iiitac@pyr.swan.ac.uk>
* Florian La Roche <rzsfl@rz.uni-sb.de>
*
- * Version: $Id: skbuff.c,v 1.72 2000/04/13 00:55:54 davem Exp $
+ * Version: $Id: skbuff.c,v 1.73 2000/05/22 07:29:44 davem Exp $
*
* Fixes:
* Alan Cox : Fixed the worst of the load balancer bugs.
@@ -90,7 +90,7 @@ void skb_over_panic(struct sk_buff *skb, int sz, void *here)
{
printk("skput:over: %p:%d put:%d dev:%s",
here, skb->len, sz, skb->dev ? skb->dev->name : "<NULL>");
- *(int*)0 = 0;
+ BUG();
}
/**
@@ -107,7 +107,7 @@ void skb_under_panic(struct sk_buff *skb, int sz, void *here)
{
printk("skput:under: %p:%d put:%d dev:%s",
here, skb->len, sz, skb->dev ? skb->dev->name : "<NULL>");
- *(int*)0 = 0;
+ BUG();
}
static __inline__ struct sk_buff *skb_head_from_pool(void)
@@ -172,7 +172,7 @@ struct sk_buff *alloc_skb(unsigned int size,int gfp_mask)
if (++count < 5) {
printk(KERN_ERR "alloc_skb called nonatomically "
"from interrupt %p\n", NET_CALLER(size));
- *(int*)0 = 0;
+ BUG();
}
gfp_mask &= ~__GFP_WAIT;
}
@@ -273,7 +273,7 @@ void __kfree_skb(struct sk_buff *skb)
if (skb->list) {
printk(KERN_WARNING "Warning: kfree_skb passed an skb still "
"on a list (from %p).\n", NET_CALLER(skb));
- *(int*)0 = 0;
+ BUG();
}
dst_release(skb->dst);
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 50f09f1ec..b51d1c4e9 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -268,10 +268,10 @@ static struct ip_tunnel * ipgre_tunnel_locate(struct ip_tunnel_parm *parms, int
dev->priv = (void*)(dev+1);
nt = (struct ip_tunnel*)dev->priv;
nt->dev = dev;
- strcpy(dev->name, nt->parms.name);
dev->init = ipgre_tunnel_init;
dev->new_style = 1;
memcpy(&nt->parms, parms, sizeof(*parms));
+ strcpy(dev->name, nt->parms.name);
if (dev->name[0] == 0) {
int i;
for (i=1; i<100; i++) {
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index ed0c9f3e9..4069795fb 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -1,7 +1,7 @@
/*
* Linux NET3: IP/IP protocol decoder.
*
- * Version: $Id: ipip.c,v 1.33 2000/05/05 02:17:17 davem Exp $
+ * Version: $Id: ipip.c,v 1.34 2000/05/22 08:12:19 davem Exp $
*
* Authors:
* Sam Lantinga (slouken@cs.ucdavis.edu) 02/01/95
@@ -237,10 +237,10 @@ struct ip_tunnel * ipip_tunnel_locate(struct ip_tunnel_parm *parms, int create)
dev->priv = (void*)(dev+1);
nt = (struct ip_tunnel*)dev->priv;
nt->dev = dev;
- strcpy(dev->name, nt->parms.name);
dev->init = ipip_tunnel_init;
dev->new_style = 1;
memcpy(&nt->parms, parms, sizeof(*parms));
+ strcpy(dev->name, nt->parms.name);
if (dev->name[0] == 0) {
int i;
for (i=1; i<100; i++) {
diff --git a/net/ipv6/Config.in b/net/ipv6/Config.in
index 80498a9fe..dd313de81 100644
--- a/net/ipv6/Config.in
+++ b/net/ipv6/Config.in
@@ -12,3 +12,7 @@ if [ "$CONFIG_NETLINK" = "y" ]; then
fi
#bool ' IPv6: flow policy support' CONFIG_RT6_POLICY
#bool ' IPv6: firewall support' CONFIG_IPV6_FIREWALL
+
+if [ "$CONFIG_NETFILTER" != "n" ]; then
+ source net/ipv6/netfilter/Config.in
+fi
diff --git a/net/ipv6/netfilter/Config.in b/net/ipv6/netfilter/Config.in
new file mode 100644
index 000000000..626e1634d
--- /dev/null
+++ b/net/ipv6/netfilter/Config.in
@@ -0,0 +1,49 @@
+#
+# IP netfilter configuration
+#
+mainmenu_option next_comment
+comment ' IPv6: Netfilter Configuration'
+
+#tristate 'Connection tracking (required for masq/NAT)' CONFIG_IP6_NF_CONNTRACK
+#if [ "$CONFIG_IP6_NF_CONNTRACK" != "n" ]; then
+# dep_tristate ' FTP protocol support' CONFIG_IP6_NF_FTP $CONFIG_IP6_NF_CONNTRACK
+#fi
+
+#if [ "$CONFIG_EXPERIMENTAL" = "y" -a "$CONFIG_NETLINK" = "y" ]; then
+# tristate 'Userspace queueing via NETLINK (EXPERIMENTAL)' CONFIG_IP6_NF_QUEUE
+#fi
+tristate 'IP6 tables support (required for filtering/masq/NAT)' CONFIG_IP6_NF_IPTABLES
+if [ "$CONFIG_IP6_NF_IPTABLES" != "n" ]; then
+# The simple matches.
+ dep_tristate ' limit match support' CONFIG_IP6_NF_MATCH_LIMIT $CONFIG_IP6_NF_IPTABLES
+# dep_tristate ' MAC address match support' CONFIG_IP6_NF_MATCH_MAC $CONFIG_IP6_NF_IPTABLES
+ dep_tristate ' netfilter MARK match support' CONFIG_IP6_NF_MATCH_MARK $CONFIG_IP6_NF_IPTABLES
+# dep_tristate ' Multiple port match support' CONFIG_IP6_NF_MATCH_MULTIPORT $CONFIG_IP6_NF_IPTABLES
+# dep_tristate ' TOS match support' CONFIG_IP6_NF_MATCH_TOS $CONFIG_IP6_NF_IPTABLES
+# if [ "$CONFIG_IP6_NF_CONNTRACK" != "n" ]; then
+# dep_tristate ' Connection state match support' CONFIG_IP6_NF_MATCH_STATE $CONFIG_IP6_NF_CONNTRACK $CONFIG_IP6_NF_IPTABLES
+# fi
+# if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+# dep_tristate ' Unclean match support (EXPERIMENTAL)' CONFIG_IP6_NF_MATCH_UNCLEAN $CONFIG_IP6_NF_IPTABLES
+# dep_tristate ' Owner match support (EXPERIMENTAL)' CONFIG_IP6_NF_MATCH_OWNER $CONFIG_IP6_NF_IPTABLES
+# fi
+
+# The targets
+ dep_tristate ' Packet filtering' CONFIG_IP6_NF_FILTER $CONFIG_IP6_NF_IPTABLES
+
+ if [ "$CONFIG_IP6_NF_FILTER" != "n" ]; then
+# dep_tristate ' REJECT target support' CONFIG_IP6_NF_TARGET_REJECT $CONFIG_IP6_NF_FILTER
+# if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+# dep_tristate ' MIRROR target support (EXPERIMENTAL)' CONFIG_IP6_NF_TARGET_MIRROR $CONFIG_IP6_NF_FILTER
+# fi
+ fi
+
+ dep_tristate ' Packet mangling' CONFIG_IP6_NF_MANGLE $CONFIG_IP6_NF_IPTABLES
+ if [ "$CONFIG_IP6_NF_MANGLE" != "n" ]; then
+# dep_tristate ' TOS target support' CONFIG_IP6_NF_TARGET_TOS $CONFIG_IP_NF_MANGLE
+ dep_tristate ' MARK target support' CONFIG_IP6_NF_TARGET_MARK $CONFIG_IP6_NF_MANGLE
+ fi
+ #dep_tristate ' LOG target support' CONFIG_IP6_NF_TARGET_LOG $CONFIG_IP6_NF_IPTABLES
+fi
+
+endmenu
diff --git a/net/ipv6/netfilter/Makefile b/net/ipv6/netfilter/Makefile
new file mode 100644
index 000000000..3dfbefc26
--- /dev/null
+++ b/net/ipv6/netfilter/Makefile
@@ -0,0 +1,180 @@
+#
+# Makefile for the netfilter modules on top of IPv6.
+#
+# Note! Dependencies are done automagically by 'make dep', which also
+# removes any old dependencies. DON'T put your own dependencies here
+# unless it's something special (ie not a .c file).
+#
+# Note 2! The CFLAGS definition is now in the main makefile...
+
+O_TARGET := netfilter.o
+MOD_LIST_NAME := IPV6_MODULES
+M_OBJS :=
+
+IP6_NF_CONNTRACK_OBJ:=ip6_conntrack_core.o ip6_conntrack_proto_generic.o ip6_conntrack_proto_tcp.o ip6_conntrack_proto_udp.o ip6_conntrack_proto_icmp.o
+
+# Link order matters here.
+ifeq ($(CONFIG_IP6_NF_CONNTRACK),y)
+O_OBJS += ip6_conntrack_standalone.o $(IP6_NF_CONNTRACK_OBJ)
+else
+ ifeq ($(CONFIG_IP6_NF_CONNTRACK),m)
+ MI_OBJS += $(IP6_NF_CONNTRACK_OBJ)
+ MIX_OBJS += ip6_conntrack_standalone.o
+ M_OBJS += ip6_conntrack.o
+ endif
+endif
+
+ifeq ($(CONFIG_IP6_NF_FTP),y)
+O_OBJS += ip6_conntrack_ftp.o
+else
+ ifeq ($(CONFIG_IP6_NF_FTP),m)
+ MX_OBJS += ip6_conntrack_ftp.o
+ endif
+endif
+
+ifeq ($(CONFIG_IP6_NF_IPTABLES),y)
+O_OBJS += ip6_tables.o
+else
+ ifeq ($(CONFIG_IP6_NF_IPTABLES),m)
+ MX_OBJS += ip6_tables.o
+ endif
+endif
+
+ifeq ($(CONFIG_IP6_NF_MATCH_LIMIT),y)
+O_OBJS += ip6t_limit.o
+else
+ ifeq ($(CONFIG_IP6_NF_MATCH_LIMIT),m)
+ M_OBJS += ip6t_limit.o
+ endif
+endif
+
+ifeq ($(CONFIG_IP6_NF_MATCH_MARK),y)
+O_OBJS += ip6t_mark.o
+else
+ ifeq ($(CONFIG_IP6_NF_MATCH_MARK),m)
+ M_OBJS += ip6t_mark.o
+ endif
+endif
+
+ifeq ($(CONFIG_IP6_NF_MATCH_MAC),y)
+O_OBJS += ip6t_mac.o
+else
+ ifeq ($(CONFIG_IP6_NF_MATCH_MAC),m)
+ M_OBJS += ip6t_mac.o
+ endif
+endif
+
+ifeq ($(CONFIG_IP6_NF_MATCH_MULTIPORT),y)
+O_OBJS += ip6t_multiport.o
+else
+ ifeq ($(CONFIG_IP6_NF_MATCH_MULTIPORT),m)
+ M_OBJS += ip6t_multiport.o
+ endif
+endif
+
+ifeq ($(CONFIG_IP6_NF_MATCH_OWNER),y)
+O_OBJS += ip6t_owner.o
+else
+ ifeq ($(CONFIG_IP6_NF_MATCH_OWNER),m)
+ M_OBJS += ip6t_owner.o
+ endif
+endif
+
+ifeq ($(CONFIG_IP6_NF_MATCH_TOS),y)
+O_OBJS += ip6t_tos.o
+else
+ ifeq ($(CONFIG_IP6_NF_MATCH_TOS),m)
+ M_OBJS += ip6t_tos.o
+ endif
+endif
+
+ifeq ($(CONFIG_IP6_NF_MATCH_STATE),y)
+O_OBJS += ip6t_state.o
+else
+ ifeq ($(CONFIG_IP6_NF_MATCH_STATE),m)
+ M_OBJS += ip6t_state.o
+ endif
+endif
+
+ifeq ($(CONFIG_IP6_NF_MATCH_UNCLEAN),y)
+O_OBJS += ip6t_unclean.o
+else
+ ifeq ($(CONFIG_IP6_NF_MATCH_UNCLEAN),m)
+ M_OBJS += ip6t_unclean.o
+ endif
+endif
+
+ifeq ($(CONFIG_IP6_NF_FILTER),y)
+O_OBJS += ip6table_filter.o
+else
+ ifeq ($(CONFIG_IP6_NF_FILTER),m)
+ M_OBJS += ip6table_filter.o
+ endif
+endif
+
+ifeq ($(CONFIG_IP6_NF_TARGET_REJECT),y)
+O_OBJS += ip6t_REJECT.o
+else
+ ifeq ($(CONFIG_IP6_NF_TARGET_REJECT),m)
+ M_OBJS += ip6t_REJECT.o
+ endif
+endif
+
+ifeq ($(CONFIG_IP6_NF_TARGET_MIRROR),y)
+O_OBJS += ip6t_MIRROR.o
+else
+ ifeq ($(CONFIG_IP6_NF_TARGET_MIRROR),m)
+ M_OBJS += ip6t_MIRROR.o
+ endif
+endif
+
+ifeq ($(CONFIG_IP6_NF_TARGET_TOS),y)
+O_OBJS += ip6t_TOS.o
+else
+ ifeq ($(CONFIG_IP6_NF_TARGET_TOS),m)
+ M_OBJS += ip6t_TOS.o
+ endif
+endif
+
+ifeq ($(CONFIG_IP6_NF_TARGET_MARK),y)
+O_OBJS += ip6t_MARK.o
+else
+ ifeq ($(CONFIG_IP6_NF_TARGET_MARK),m)
+ M_OBJS += ip6t_MARK.o
+ endif
+endif
+
+ifeq ($(CONFIG_IP6_NF_TARGET_REDIRECT),y)
+O_OBJS += ip6t_REDIRECT.o
+else
+ ifeq ($(CONFIG_IP6_NF_TARGET_REDIRECT),m)
+ M_OBJS += ip6t_REDIRECT.o
+ endif
+endif
+
+ifeq ($(CONFIG_IP6_NF_TARGET_LOG),y)
+O_OBJS += ip6t_LOG.o
+else
+ ifeq ($(CONFIG_IP6_NF_TARGET_LOG),m)
+ M_OBJS += ip6t_LOG.o
+ endif
+endif
+
+ifeq ($(CONFIG_IP6_NF_QUEUE),y)
+O_OBJS += ip6_queue.o
+else
+ ifeq ($(CONFIG_IP6_NF_QUEUE),m)
+ M_OBJS += ip6_queue.o
+ endif
+endif
+
+include $(TOPDIR)/Rules.make
+
+ip6_conntrack.o: ip6_conntrack_standalone.o $(IP6_NF_CONNTRACK_OBJ)
+ $(LD) -r -o $@ $(IP6_NF_CONNTRACK_OBJ) ip6_conntrack_standalone.o
+
+ip6fwadm.o: ipfwadm_core.o $(IP6_NF_COMPAT_LAYER)
+ $(LD) -r -o $@ ip6fwadm_core.o $(IP6_NF_COMPAT_LAYER)
+
+ip6chains.o: ip6chains_core.o $(IP6_NF_COMPAT_LAYER)
+ $(LD) -r -o $@ ip6chains_core.o $(IP6_NF_COMPAT_LAYER)
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
new file mode 100644
index 000000000..2d9c356e9
--- /dev/null
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -0,0 +1,1795 @@
+/*
+ * Packet matching code.
+ *
+ * Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling
+ */
+#include <linux/config.h>
+#include <linux/skbuff.h>
+#include <linux/kmod.h>
+#include <linux/vmalloc.h>
+#include <linux/netdevice.h>
+#include <linux/module.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#include <linux/icmp.h>
+#include <net/ip.h>
+#include <asm/uaccess.h>
+#include <asm/semaphore.h>
+#include <linux/proc_fs.h>
+
+#include <linux/netfilter_ipv6/ip6_tables.h>
+
+#define IPV6_HDR_LEN (sizeof(struct ipv6hdr))
+
+/*#define DEBUG_IP_FIREWALL*/
+/*#define DEBUG_ALLOW_ALL*/ /* Useful for remote debugging */
+/*#define DEBUG_IP_FIREWALL_USER*/
+
+#ifdef DEBUG_IP_FIREWALL
+#define dprintf(format, args...) printk(format , ## args)
+#else
+#define dprintf(format, args...)
+#endif
+
+#ifdef DEBUG_IP_FIREWALL_USER
+#define duprintf(format, args...) printk(format , ## args)
+#else
+#define duprintf(format, args...)
+#endif
+
+#ifdef CONFIG_NETFILTER_DEBUG
+#define IP_NF_ASSERT(x) \
+do { \
+ if (!(x)) \
+ printk("IP_NF_ASSERT: %s:%s:%u\n", \
+ __FUNCTION__, __FILE__, __LINE__); \
+} while(0)
+#else
+#define IP_NF_ASSERT(x)
+#endif
+#define SMP_ALIGN(x) (((x) + SMP_CACHE_BYTES-1) & ~(SMP_CACHE_BYTES-1))
+
+/* Mutex protects lists (only traversed in user context). */
+static DECLARE_MUTEX(ip6t_mutex);
+
+/* Must have mutex */
+#define ASSERT_READ_LOCK(x) IP_NF_ASSERT(down_trylock(&ip6t_mutex) != 0)
+#define ASSERT_WRITE_LOCK(x) IP_NF_ASSERT(down_trylock(&ip6t_mutex) != 0)
+#include <linux/netfilter_ipv4/lockhelp.h>
+#include <linux/netfilter_ipv4/listhelp.h>
+
+#if 0
+/* All the better to debug you with... */
+#define static
+#define inline
+#endif
+
+/* Locking is simple: we assume at worst case there will be one packet
+ in user context and one from bottom halves (or soft irq if Alexey's
+ softnet patch was applied).
+
+ We keep a set of rules for each CPU, so we can avoid write-locking
+ them; doing a readlock_bh() stops packets coming through if we're
+ in user context.
+
+ To be cache friendly on SMP, we arrange them like so:
+ [ n-entries ]
+ ... cache-align padding ...
+ [ n-entries ]
+
+ Hence the start of any table is given by get_table() below. */
+
+/* The table itself */
+struct ip6t_table_info
+{
+ /* Size per table */
+ unsigned int size;
+ /* Number of entries: FIXME. --RR */
+ unsigned int number;
+
+ /* Entry points and underflows */
+ unsigned int hook_entry[NF_IP6_NUMHOOKS];
+ unsigned int underflow[NF_IP6_NUMHOOKS];
+
+ char padding[SMP_ALIGN((NF_IP6_NUMHOOKS*2+2)*sizeof(unsigned int))];
+
+ /* ip6t_entry tables: one per CPU */
+ char entries[0];
+};
+
+static LIST_HEAD(ip6t_target);
+static LIST_HEAD(ip6t_match);
+static LIST_HEAD(ip6t_tables);
+#define ADD_COUNTER(c,b,p) do { (c).bcnt += (b); (c).pcnt += (p); } while(0)
+
+#ifdef CONFIG_SMP
+#define TABLE_OFFSET(t,p) (SMP_ALIGN((t)->size)*cpu_number_map(p))
+#else
+#define TABLE_OFFSET(t,p) 0
+#endif
+
+#if 0
+#define down(x) do { printk("DOWN:%u:" #x "\n", __LINE__); down(x); } while(0)
+#define down_interruptible(x) ({ int __r; printk("DOWNi:%u:" #x "\n", __LINE__); __r = down_interruptible(x); if (__r != 0) printk("ABORT-DOWNi:%u\n", __LINE__); __r; })
+#define up(x) do { printk("UP:%u:" #x "\n", __LINE__); up(x); } while(0)
+#endif
+
+static int ip6_masked_addrcmp(struct in6_addr addr1, struct in6_addr mask,
+ struct in6_addr addr2)
+{
+ int i;
+ for( i = 0; i < 16; i++){
+ if((addr1.s6_addr[i] & mask.s6_addr[i]) !=
+ (addr2.s6_addr[i] & mask.s6_addr[i]))
+ return 1;
+ }
+ return 0;
+}
+
+/* takes in current header and pointer to the header */
+/* if another header exists, sets hdrptr to the next header
+ and returns the new header value, else returns 0 */
+static u_int8_t ip6_nexthdr(u_int8_t currenthdr, u_int8_t *hdrptr)
+{
+ int i;
+ u_int8_t hdrlen, nexthdr = 0;
+ switch(currenthdr){
+ case IPPROTO_AH:
+ /* whoever decided to do the length of AUTH for ipv6
+ in 32bit units unlike other headers should be beaten...
+ repeatedly...with a large stick...no, an even LARGER
+ stick...no, you're still not thinking big enough */
+ nexthdr = *hdrptr;
+ hdrlen = hdrptr[i] * 4 + 8;
+ hdrptr = hdrptr + hdrlen;
+ break;
+ /*stupid rfc2402 */
+ case IPPROTO_DSTOPTS:
+ case IPPROTO_ROUTING:
+ case IPPROTO_HOPOPTS:
+ nexthdr = *hdrptr;
+ hdrlen = hdrptr[1] * 8 + 8;
+ hdrptr = hdrptr + hdrlen;
+ break;
+ case IPPROTO_FRAGMENT:
+ nexthdr = *hdrptr;
+ hdrptr = hdrptr + 8;
+ break;
+ }
+ return nexthdr;
+
+}
+
+/* Returns whether matches rule or not. */
+static inline int
+ip6_packet_match(const struct ipv6hdr *ipv6,
+ const char *indev,
+ const char *outdev,
+ const struct ip6t_ip6 *ip6info,
+ int isfrag)
+{
+ size_t i;
+ unsigned long ret;
+
+#define FWINV(bool,invflg) ((bool) ^ !!(ip6info->invflags & invflg))
+
+ if (FWINV(ip6_masked_addrcmp(ipv6->saddr,ip6info->smsk,ip6info->src),
+ IP6T_INV_SRCIP)
+ || FWINV(ip6_masked_addrcmp(ipv6->daddr,ip6info->dmsk,ip6info->dst),
+ IP6T_INV_DSTIP)) {
+ dprintf("Source or dest mismatch.\n");
+/*
+ dprintf("SRC: %u. Mask: %u. Target: %u.%s\n", ip->saddr,
+ ipinfo->smsk.s_addr, ipinfo->src.s_addr,
+ ipinfo->invflags & IP6T_INV_SRCIP ? " (INV)" : "");
+ dprintf("DST: %u. Mask: %u. Target: %u.%s\n", ip->daddr,
+ ipinfo->dmsk.s_addr, ipinfo->dst.s_addr,
+ ipinfo->invflags & IP6T_INV_DSTIP ? " (INV)" : "");*/
+ return 0;
+ }
+
+ /* Look for ifname matches; this should unroll nicely. */
+ for (i = 0, ret = 0; i < IFNAMSIZ/sizeof(unsigned long); i++) {
+ ret |= (((const unsigned long *)indev)[i]
+ ^ ((const unsigned long *)ip6info->iniface)[i])
+ & ((const unsigned long *)ip6info->iniface_mask)[i];
+ }
+
+ if (FWINV(ret != 0, IP6T_INV_VIA_IN)) {
+ dprintf("VIA in mismatch (%s vs %s).%s\n",
+ indev, ip6info->iniface,
+ ip6info->invflags&IP6T_INV_VIA_IN ?" (INV)":"");
+ return 0;
+ }
+
+ for (i = 0, ret = 0; i < IFNAMSIZ/sizeof(unsigned long); i++) {
+ ret |= (((const unsigned long *)outdev)[i]
+ ^ ((const unsigned long *)ip6info->outiface)[i])
+ & ((const unsigned long *)ip6info->outiface_mask)[i];
+ }
+
+ if (FWINV(ret != 0, IP6T_INV_VIA_OUT)) {
+ dprintf("VIA out mismatch (%s vs %s).%s\n",
+ outdev, ip6info->outiface,
+ ip6info->invflags&IP6T_INV_VIA_OUT ?" (INV)":"");
+ return 0;
+ }
+
+/* ... might want to do something with class and flowlabel here ... */
+
+ /* look for the desired protocol header */
+ if((ip6info->flags & IP6T_F_PROTO)) {
+ u_int8_t currenthdr = ipv6->nexthdr;
+ u_int8_t *hdrptr;
+ hdrptr = (u_int8_t *)(ipv6 + 1);
+ do {
+ if (ip6info->proto == currenthdr) {
+ if(ip6info->invflags & IP6T_INV_PROTO)
+ return 0;
+ return 1;
+ }
+ currenthdr = ip6_nexthdr(currenthdr, hdrptr);
+ } while(currenthdr);
+ if (!(ip6info->invflags & IP6T_INV_PROTO))
+ return 0;
+ }
+ return 1;
+}
+
+/* should be ip6 safe */
+static inline int
+ip6_checkentry(const struct ip6t_ip6 *ipv6)
+{
+ if (ipv6->flags & ~IP6T_F_MASK) {
+ duprintf("Unknown flag bits set: %08X\n",
+ ipv6->flags & ~IP6T_F_MASK);
+ return 0;
+ }
+ if (ipv6->invflags & ~IP6T_INV_MASK) {
+ duprintf("Unknown invflag bits set: %08X\n",
+ ipv6->invflags & ~IP6T_INV_MASK);
+ return 0;
+ }
+ return 1;
+}
+
+static unsigned int
+ip6t_error(struct sk_buff **pskb,
+ unsigned int hooknum,
+ const struct net_device *in,
+ const struct net_device *out,
+ const void *targinfo,
+ void *userinfo)
+{
+ if (net_ratelimit())
+ printk("ip6_tables: error: `%s'\n", (char *)targinfo);
+
+ return NF_DROP;
+}
+
+static inline
+int do_match(struct ip6t_entry_match *m,
+ const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int offset,
+ const void *hdr,
+ u_int16_t datalen,
+ int *hotdrop)
+{
+ /* Stop iteration if it doesn't match */
+ if (!m->u.kernel.match->match(skb, in, out, m->data,
+ offset, hdr, datalen, hotdrop))
+ return 1;
+ else
+ return 0;
+}
+
+static inline struct ip6t_entry *
+get_entry(void *base, unsigned int offset)
+{
+ return (struct ip6t_entry *)(base + offset);
+}
+
+/* Returns one of the generic firewall policies, like NF_ACCEPT. */
+unsigned int
+ip6t_do_table(struct sk_buff **pskb,
+ unsigned int hook,
+ const struct net_device *in,
+ const struct net_device *out,
+ struct ip6t_table *table,
+ void *userdata)
+{
+ static const char nulldevname[IFNAMSIZ] = { 0 };
+ u_int16_t offset = 0;
+ struct ipv6hdr *ipv6;
+ void *protohdr;
+ u_int16_t datalen;
+ int hotdrop = 0;
+ /* Initializing verdict to NF_DROP keeps gcc happy. */
+ unsigned int verdict = NF_DROP;
+ const char *indev, *outdev;
+ void *table_base;
+ struct ip6t_entry *e, *back;
+
+ /* Initialization */
+ ipv6 = (*pskb)->nh.ipv6h;
+ protohdr = (u_int32_t *)ipv6 + IPV6_HDR_LEN;
+ datalen = (*pskb)->len - IPV6_HDR_LEN;
+ indev = in ? in->name : nulldevname;
+ outdev = out ? out->name : nulldevname;
+
+ /* We handle fragments by dealing with the first fragment as
+ * if it was a normal packet. All other fragments are treated
+ * normally, except that they will NEVER match rules that ask
+ * things we don't know, ie. tcp syn flag or ports). If the
+ * rule is also a fragment-specific rule, non-fragments won't
+ * match it. */
+
+ read_lock_bh(&table->lock);
+ IP_NF_ASSERT(table->valid_hooks & (1 << hook));
+ table_base = (void *)table->private->entries
+ + TABLE_OFFSET(table->private, smp_processor_id());
+ e = get_entry(table_base, table->private->hook_entry[hook]);
+
+#ifdef CONFIG_NETFILTER_DEBUG
+ /* Check noone else using our table */
+ if (((struct ip6t_entry *)table_base)->comefrom != 0xdead57ac
+ && ((struct ip6t_entry *)table_base)->comefrom != 0xeeeeeeec) {
+ printk("ASSERT: CPU #%u, %s comefrom(%p) = %X\n",
+ smp_processor_id(),
+ table->name,
+ &((struct ip6t_entry *)table_base)->comefrom,
+ ((struct ip6t_entry *)table_base)->comefrom);
+ }
+ ((struct ip6t_entry *)table_base)->comefrom = 0x57acc001;
+#endif
+
+ /* For return from builtin chain */
+ back = get_entry(table_base, table->private->underflow[hook]);
+
+ do {
+ IP_NF_ASSERT(e);
+ IP_NF_ASSERT(back);
+ (*pskb)->nfcache |= e->nfcache;
+ if (ip6_packet_match(ipv6, indev, outdev, &e->ipv6, offset)) {
+ struct ip6t_entry_target *t;
+
+ if (IP6T_MATCH_ITERATE(e, do_match,
+ *pskb, in, out,
+ offset, protohdr,
+ datalen, &hotdrop) != 0)
+ goto no_match;
+
+ ADD_COUNTER(e->counters, ntohs(ipv6->payload_len) + IPV6_HDR_LEN, 1);
+
+ t = ip6t_get_target(e);
+ IP_NF_ASSERT(t->u.kernel.target);
+ /* Standard target? */
+ if (!t->u.kernel.target->target) {
+ int v;
+
+ v = ((struct ip6t_standard_target *)t)->verdict;
+ if (v < 0) {
+ /* Pop from stack? */
+ if (v != IP6T_RETURN) {
+ verdict = (unsigned)(-v) - 1;
+ break;
+ }
+ e = back;
+ back = get_entry(table_base,
+ back->comefrom);
+ continue;
+ }
+ if (table_base + v
+ != (void *)e + e->next_offset) {
+ /* Save old back ptr in next entry */
+ struct ip6t_entry *next
+ = (void *)e + e->next_offset;
+ next->comefrom
+ = (void *)back - table_base;
+ /* set back pointer to next entry */
+ back = next;
+ }
+
+ e = get_entry(table_base, v);
+ } else {
+ /* Targets which reenter must return
+ abs. verdicts */
+#ifdef CONFIG_NETFILTER_DEBUG
+ ((struct ip6t_entry *)table_base)->comefrom
+ = 0xeeeeeeec;
+#endif
+ verdict = t->u.kernel.target->target(pskb,
+ hook,
+ in, out,
+ t->data,
+ userdata);
+
+#ifdef CONFIG_NETFILTER_DEBUG
+ if (((struct ip6t_entry *)table_base)->comefrom
+ != 0xeeeeeeec
+ && verdict == IP6T_CONTINUE) {
+ printk("Target %s reentered!\n",
+ t->u.kernel.target->name);
+ verdict = NF_DROP;
+ }
+ ((struct ip6t_entry *)table_base)->comefrom
+ = 0x57acc001;
+#endif
+ /* Target might have changed stuff. */
+ ipv6 = (*pskb)->nh.ipv6h;
+ protohdr = (u_int32_t *)ipv6 + IPV6_HDR_LEN;
+ datalen = (*pskb)->len - IPV6_HDR_LEN;
+
+ if (verdict == IP6T_CONTINUE)
+ e = (void *)e + e->next_offset;
+ else
+ /* Verdict */
+ break;
+ }
+ } else {
+
+ no_match:
+ e = (void *)e + e->next_offset;
+ }
+ } while (!hotdrop);
+
+#ifdef CONFIG_NETFILTER_DEBUG
+ ((struct ip6t_entry *)table_base)->comefrom = 0xdead57ac;
+#endif
+ read_unlock_bh(&table->lock);
+
+#ifdef DEBUG_ALLOW_ALL
+ return NF_ACCEPT;
+#else
+ if (hotdrop)
+ return NF_DROP;
+ else return verdict;
+#endif
+}
+
+/* If it succeeds, returns element and locks mutex */
+static inline void *
+find_inlist_lock_noload(struct list_head *head,
+ const char *name,
+ int *error,
+ struct semaphore *mutex)
+{
+ void *ret;
+
+#if 1
+ duprintf("find_inlist: searching for `%s' in %s.\n",
+ name, head == &ip6t_target ? "ip6t_target"
+ : head == &ip6t_match ? "ip6t_match"
+ : head == &ip6t_tables ? "ip6t_tables" : "UNKNOWN");
+#endif
+
+ *error = down_interruptible(mutex);
+ if (*error != 0)
+ return NULL;
+
+ ret = list_named_find(head, name);
+ if (!ret) {
+ *error = -ENOENT;
+ up(mutex);
+ }
+ return ret;
+}
+
+#ifndef CONFIG_KMOD
+#define find_inlist_lock(h,n,p,e,m) find_inlist_lock_noload((h),(n),(e),(m))
+#else
+static void *
+find_inlist_lock(struct list_head *head,
+ const char *name,
+ const char *prefix,
+ int *error,
+ struct semaphore *mutex)
+{
+ void *ret;
+
+ ret = find_inlist_lock_noload(head, name, error, mutex);
+ if (!ret) {
+ char modulename[IP6T_FUNCTION_MAXNAMELEN + strlen(prefix) + 1];
+ strcpy(modulename, prefix);
+ strcat(modulename, name);
+ duprintf("find_inlist: loading `%s'.\n", modulename);
+ request_module(modulename);
+ ret = find_inlist_lock_noload(head, name, error, mutex);
+ }
+
+ return ret;
+}
+#endif
+
+static inline struct ip6t_table *
+find_table_lock(const char *name, int *error, struct semaphore *mutex)
+{
+ return find_inlist_lock(&ip6t_tables, name, "ip6table_", error, mutex);
+}
+
+static inline struct ip6t_match *
+find_match_lock(const char *name, int *error, struct semaphore *mutex)
+{
+ return find_inlist_lock(&ip6t_match, name, "ip6t_", error, mutex);
+}
+
+static inline struct ip6t_target *
+find_target_lock(const char *name, int *error, struct semaphore *mutex)
+{
+ return find_inlist_lock(&ip6t_target, name, "ip6t_", error, mutex);
+}
+
+/* All zeroes == unconditional rule. */
+static inline int
+unconditional(const struct ip6t_ip6 *ipv6)
+{
+ unsigned int i;
+
+ for (i = 0; i < sizeof(*ipv6); i++)
+ if (((char *)ipv6)[i])
+ break;
+
+ return (i == sizeof(*ipv6));
+}
+
+/* Figures out from what hook each rule can be called: returns 0 if
+ there are loops. Puts hook bitmask in comefrom. */
+static int
+mark_source_chains(struct ip6t_table_info *newinfo, unsigned int valid_hooks)
+{
+ unsigned int hook;
+
+ /* No recursion; use packet counter to save back ptrs (reset
+ to 0 as we leave), and comefrom to save source hook bitmask */
+ for (hook = 0; hook < NF_IP6_NUMHOOKS; hook++) {
+ unsigned int pos = newinfo->hook_entry[hook];
+ struct ip6t_entry *e
+ = (struct ip6t_entry *)(newinfo->entries + pos);
+
+ if (!(valid_hooks & (1 << hook)))
+ continue;
+
+ /* Set initial back pointer. */
+ e->counters.pcnt = pos;
+
+ for (;;) {
+ struct ip6t_standard_target *t
+ = (void *)ip6t_get_target(e);
+
+ if (e->comefrom & (1 << NF_IP6_NUMHOOKS)) {
+ printk("iptables: loop hook %u pos %u %08X.\n",
+ hook, pos, e->comefrom);
+ return 0;
+ }
+ e->comefrom
+ |= ((1 << hook) | (1 << NF_IP6_NUMHOOKS));
+
+ /* Unconditional return/END. */
+ if (e->target_offset == sizeof(struct ip6t_entry)
+ && (strcmp(t->target.u.user.name,
+ IP6T_STANDARD_TARGET) == 0)
+ && t->verdict < 0
+ && unconditional(&e->ipv6)) {
+ unsigned int oldpos, size;
+
+ /* Return: backtrack through the last
+ big jump. */
+ do {
+ e->comefrom ^= (1<<NF_IP6_NUMHOOKS);
+#ifdef DEBUG_IP_FIREWALL_USER
+ if (e->comefrom
+ & (1 << NF_IP6_NUMHOOKS)) {
+ duprintf("Back unset "
+ "on hook %u "
+ "rule %u\n",
+ hook, pos);
+ }
+#endif
+ oldpos = pos;
+ pos = e->counters.pcnt;
+ e->counters.pcnt = 0;
+
+ /* We're at the start. */
+ if (pos == oldpos)
+ goto next;
+
+ e = (struct ip6t_entry *)
+ (newinfo->entries + pos);
+ } while (oldpos == pos + e->next_offset);
+
+ /* Move along one */
+ size = e->next_offset;
+ e = (struct ip6t_entry *)
+ (newinfo->entries + pos + size);
+ e->counters.pcnt = pos;
+ pos += size;
+ } else {
+ int newpos = t->verdict;
+
+ if (strcmp(t->target.u.user.name,
+ IP6T_STANDARD_TARGET) == 0
+ && newpos >= 0) {
+ /* This a jump; chase it. */
+ duprintf("Jump rule %u -> %u\n",
+ pos, newpos);
+ } else {
+ /* ... this is a fallthru */
+ newpos = pos + e->next_offset;
+ }
+ e = (struct ip6t_entry *)
+ (newinfo->entries + newpos);
+ e->counters.pcnt = pos;
+ pos = newpos;
+ }
+ }
+ next:
+ duprintf("Finished chain %u\n", hook);
+ }
+ return 1;
+}
+
+static inline int
+cleanup_match(struct ip6t_entry_match *m, unsigned int *i)
+{
+ if (i && (*i)-- == 0)
+ return 1;
+
+ if (m->u.kernel.match->destroy)
+ m->u.kernel.match->destroy(m->data,
+ m->u.match_size - sizeof(*m));
+
+ if (m->u.kernel.match->me)
+ __MOD_DEC_USE_COUNT(m->u.kernel.match->me);
+
+ return 0;
+}
+
+static inline int
+standard_check(const struct ip6t_entry_target *t,
+ unsigned int max_offset)
+{
+ struct ip6t_standard_target *targ = (void *)t;
+
+ /* Check standard info. */
+ if (t->u.target_size
+ != IP6T_ALIGN(sizeof(struct ip6t_standard_target))) {
+ duprintf("standard_check: target size %u != %u\n",
+ t->u.target_size,
+ IP6T_ALIGN(sizeof(struct ip6t_standard_target)));
+ return 0;
+ }
+
+ if (targ->verdict >= 0
+ && targ->verdict > max_offset - sizeof(struct ip6t_entry)) {
+ duprintf("ip6t_standard_check: bad verdict (%i)\n",
+ targ->verdict);
+ return 0;
+ }
+
+ if (targ->verdict < -NF_MAX_VERDICT - 1) {
+ duprintf("ip6t_standard_check: bad negative verdict (%i)\n",
+ targ->verdict);
+ return 0;
+ }
+ return 1;
+}
+
+static inline int
+check_match(struct ip6t_entry_match *m,
+ const char *name,
+ const struct ip6t_ip6 *ipv6,
+ unsigned int hookmask,
+ unsigned int *i)
+{
+ int ret;
+ struct ip6t_match *match;
+
+ match = find_match_lock(m->u.user.name, &ret, &ip6t_mutex);
+ if (!match) {
+ // duprintf("check_match: `%s' not found\n", m->u.name);
+ return ret;
+ }
+ if (match->me)
+ __MOD_INC_USE_COUNT(match->me);
+ m->u.kernel.match = match;
+ up(&ip6t_mutex);
+
+ if (m->u.kernel.match->checkentry
+ && !m->u.kernel.match->checkentry(name, ipv6, m->data,
+ m->u.match_size - sizeof(*m),
+ hookmask)) {
+ if (m->u.kernel.match->me)
+ __MOD_DEC_USE_COUNT(m->u.kernel.match->me);
+ duprintf("ip_tables: check failed for `%s'.\n",
+ m->u.kernel.match->name);
+ return -EINVAL;
+ }
+
+ (*i)++;
+ return 0;
+}
+
+static struct ip6t_target ip6t_standard_target;
+
+static inline int
+check_entry(struct ip6t_entry *e, const char *name, unsigned int size,
+ unsigned int *i)
+{
+ struct ip6t_entry_target *t;
+ struct ip6t_target *target;
+ int ret;
+ unsigned int j;
+
+ if (!ip6_checkentry(&e->ipv6)) {
+ duprintf("ip_tables: ip check failed %p %s.\n", e, name);
+ return -EINVAL;
+ }
+
+ j = 0;
+ ret = IP6T_MATCH_ITERATE(e, check_match, name, &e->ipv6, e->comefrom, &j);
+ if (ret != 0)
+ goto cleanup_matches;
+
+ t = ip6t_get_target(e);
+ target = find_target_lock(t->u.user.name, &ret, &ip6t_mutex);
+ if (!target) {
+ // duprintf("check_entry: `%s' not found\n", t->u.name);
+ return ret;
+ }
+ if (target->me)
+ __MOD_INC_USE_COUNT(target->me);
+ t->u.kernel.target = target;
+ up(&ip6t_mutex);
+
+ if (t->u.kernel.target == &ip6t_standard_target) {
+ if (!standard_check(t, size)) {
+ ret = -EINVAL;
+ goto cleanup_matches;
+ }
+ } else if (t->u.kernel.target->checkentry
+ && !t->u.kernel.target->checkentry(name, e, t->data,
+ t->u.target_size
+ - sizeof(*t),
+ e->comefrom)) {
+ if (t->u.kernel.target->me)
+ __MOD_DEC_USE_COUNT(t->u.kernel.target->me);
+ duprintf("ip_tables: check failed for `%s'.\n",
+ t->u.kernel.target->name);
+ ret = -EINVAL;
+ goto cleanup_matches;
+ }
+
+ (*i)++;
+ return 0;
+
+ cleanup_matches:
+ IP6T_MATCH_ITERATE(e, cleanup_match, &j);
+ return ret;
+}
+
+static inline int
+check_entry_size_and_hooks(struct ip6t_entry *e,
+ struct ip6t_table_info *newinfo,
+ unsigned char *base,
+ unsigned char *limit,
+ const unsigned int *hook_entries,
+ const unsigned int *underflows,
+ unsigned int *i)
+{
+ unsigned int h;
+
+ if ((unsigned long)e % __alignof__(struct ip6t_entry) != 0
+ || (unsigned char *)e + sizeof(struct ip6t_entry) >= limit) {
+ duprintf("Bad offset %p\n", e);
+ return -EINVAL;
+ }
+
+ if (e->next_offset
+ < sizeof(struct ip6t_entry) + sizeof(struct ip6t_entry_target)) {
+ duprintf("checking: element %p size %u\n",
+ e, e->next_offset);
+ return -EINVAL;
+ }
+
+ /* Check hooks & underflows */
+ for (h = 0; h < NF_IP6_NUMHOOKS; h++) {
+ if ((unsigned char *)e - base == hook_entries[h])
+ newinfo->hook_entry[h] = hook_entries[h];
+ if ((unsigned char *)e - base == underflows[h])
+ newinfo->underflow[h] = underflows[h];
+ }
+
+ /* FIXME: underflows must be unconditional, standard verdicts
+ < 0 (not IP6T_RETURN). --RR */
+
+ /* Clear counters and comefrom */
+ e->counters = ((struct ip6t_counters) { 0, 0 });
+ e->comefrom = 0;
+
+ (*i)++;
+ return 0;
+}
+
+static inline int
+cleanup_entry(struct ip6t_entry *e, unsigned int *i)
+{
+ struct ip6t_entry_target *t;
+
+ if (i && (*i)-- == 0)
+ return 1;
+
+ /* Cleanup all matches */
+ IP6T_MATCH_ITERATE(e, cleanup_match, NULL);
+ t = ip6t_get_target(e);
+ if (t->u.kernel.target->destroy)
+ t->u.kernel.target->destroy(t->data,
+ t->u.target_size - sizeof(*t));
+ if (t->u.kernel.target->me)
+ __MOD_DEC_USE_COUNT(t->u.kernel.target->me);
+
+ return 0;
+}
+
+/* Checks and translates the user-supplied table segment (held in
+ newinfo) */
+static int
+translate_table(const char *name,
+ unsigned int valid_hooks,
+ struct ip6t_table_info *newinfo,
+ unsigned int size,
+ unsigned int number,
+ const unsigned int *hook_entries,
+ const unsigned int *underflows)
+{
+ unsigned int i;
+ int ret;
+
+ newinfo->size = size;
+ newinfo->number = number;
+
+ /* Init all hooks to impossible value. */
+ for (i = 0; i < NF_IP6_NUMHOOKS; i++) {
+ newinfo->hook_entry[i] = 0xFFFFFFFF;
+ newinfo->underflow[i] = 0xFFFFFFFF;
+ }
+
+ duprintf("translate_table: size %u\n", newinfo->size);
+ i = 0;
+ /* Walk through entries, checking offsets. */
+ ret = IP6T_ENTRY_ITERATE(newinfo->entries, newinfo->size,
+ check_entry_size_and_hooks,
+ newinfo,
+ newinfo->entries,
+ newinfo->entries + size,
+ hook_entries, underflows, &i);
+ if (ret != 0)
+ return ret;
+
+ if (i != number) {
+ duprintf("translate_table: %u not %u entries\n",
+ i, number);
+ return -EINVAL;
+ }
+
+ /* Check hooks all assigned */
+ for (i = 0; i < NF_IP6_NUMHOOKS; i++) {
+ /* Only hooks which are valid */
+ if (!(valid_hooks & (1 << i)))
+ continue;
+ if (newinfo->hook_entry[i] == 0xFFFFFFFF) {
+ duprintf("Invalid hook entry %u %u\n",
+ i, hook_entries[i]);
+ return -EINVAL;
+ }
+ if (newinfo->underflow[i] == 0xFFFFFFFF) {
+ duprintf("Invalid underflow %u %u\n",
+ i, underflows[i]);
+ return -EINVAL;
+ }
+ }
+
+ if (!mark_source_chains(newinfo, valid_hooks))
+ return -ELOOP;
+
+ /* Finally, each sanity check must pass */
+ i = 0;
+ ret = IP6T_ENTRY_ITERATE(newinfo->entries, newinfo->size,
+ check_entry, name, size, &i);
+
+ if (ret != 0) {
+ IP6T_ENTRY_ITERATE(newinfo->entries, newinfo->size,
+ cleanup_entry, &i);
+ return ret;
+ }
+
+ /* And one copy for every other CPU */
+ for (i = 1; i < smp_num_cpus; i++) {
+ memcpy(newinfo->entries + SMP_ALIGN(newinfo->size*i),
+ newinfo->entries,
+ SMP_ALIGN(newinfo->size));
+ }
+
+ return ret;
+}
+
+static struct ip6t_table_info *
+replace_table(struct ip6t_table *table,
+ unsigned int num_counters,
+ struct ip6t_table_info *newinfo,
+ int *error)
+{
+ struct ip6t_table_info *oldinfo;
+
+#ifdef CONFIG_NETFILTER_DEBUG
+ {
+ struct ip6t_entry *table_base;
+ unsigned int i;
+
+ for (i = 0; i < smp_num_cpus; i++) {
+ table_base =
+ (void *)newinfo->entries
+ + TABLE_OFFSET(newinfo, i);
+
+ table_base->comefrom = 0xdead57ac;
+ }
+ }
+#endif
+
+ /* Do the substitution. */
+ write_lock_bh(&table->lock);
+ /* Check inside lock: is the old number correct? */
+ if (num_counters != table->private->number) {
+ duprintf("num_counters != table->private->number (%u/%u)\n",
+ num_counters, table->private->number);
+ write_unlock_bh(&table->lock);
+ *error = -EAGAIN;
+ return NULL;
+ }
+ oldinfo = table->private;
+ table->private = newinfo;
+ write_unlock_bh(&table->lock);
+
+ return oldinfo;
+}
+
+/* Gets counters. */
+static inline int
+add_entry_to_counter(const struct ip6t_entry *e,
+ struct ip6t_counters total[],
+ unsigned int *i)
+{
+ ADD_COUNTER(total[*i], e->counters.bcnt, e->counters.pcnt);
+
+ (*i)++;
+ return 0;
+}
+
+static void
+get_counters(const struct ip6t_table_info *t,
+ struct ip6t_counters counters[])
+{
+ unsigned int cpu;
+ unsigned int i;
+
+ for (cpu = 0; cpu < smp_num_cpus; cpu++) {
+ i = 0;
+ IP6T_ENTRY_ITERATE(t->entries + TABLE_OFFSET(t, cpu),
+ t->size,
+ add_entry_to_counter,
+ counters,
+ &i);
+ }
+}
+
+static int
+copy_entries_to_user(unsigned int total_size,
+ struct ip6t_table *table,
+ void *userptr)
+{
+ unsigned int off, num, countersize;
+ struct ip6t_entry *e;
+ struct ip6t_counters *counters;
+ int ret = 0;
+
+ /* We need atomic snapshot of counters: rest doesn't change
+ (other than comefrom, which userspace doesn't care
+ about). */
+ countersize = sizeof(struct ip6t_counters) * table->private->number;
+ counters = vmalloc(countersize);
+
+ if (counters == NULL)
+ return -ENOMEM;
+
+ /* First, sum counters... */
+ memset(counters, 0, countersize);
+ write_lock_bh(&table->lock);
+ get_counters(table->private, counters);
+ write_unlock_bh(&table->lock);
+
+ /* ... then copy entire thing from CPU 0... */
+ if (copy_to_user(userptr, table->private->entries, total_size) != 0) {
+ ret = -EFAULT;
+ goto free_counters;
+ }
+
+ /* FIXME: use iterator macros --RR */
+ /* ... then go back and fix counters and names */
+ for (off = 0, num = 0; off < total_size; off += e->next_offset, num++){
+ unsigned int i;
+ struct ip6t_entry_match *m;
+ struct ip6t_entry_target *t;
+
+ e = (struct ip6t_entry *)(table->private->entries + off);
+ if (copy_to_user(userptr + off
+ + offsetof(struct ip6t_entry, counters),
+ &counters[num],
+ sizeof(counters[num])) != 0) {
+ ret = -EFAULT;
+ goto free_counters;
+ }
+
+ for (i = sizeof(struct ip6t_entry);
+ i < e->target_offset;
+ i += m->u.match_size) {
+ m = (void *)e + i;
+
+ if (copy_to_user(userptr + off + i
+ + offsetof(struct ip6t_entry_match,
+ u.user.name),
+ m->u.kernel.match->name,
+ strlen(m->u.kernel.match->name)+1)
+ != 0) {
+ ret = -EFAULT;
+ goto free_counters;
+ }
+ }
+
+ t = ip6t_get_target(e);
+ if (copy_to_user(userptr + off + e->target_offset
+ + offsetof(struct ip6t_entry_target,
+ u.user.name),
+ t->u.kernel.target->name,
+ strlen(t->u.kernel.target->name)+1) != 0) {
+ ret = -EFAULT;
+ goto free_counters;
+ }
+ }
+
+ free_counters:
+ vfree(counters);
+ return ret;
+}
+
+static int
+get_entries(const struct ip6t_get_entries *entries,
+ struct ip6t_get_entries *uptr)
+{
+ int ret;
+ struct ip6t_table *t;
+
+ t = find_table_lock(entries->name, &ret, &ip6t_mutex);
+ if (t) {
+ duprintf("t->private->number = %u\n",
+ t->private->number);
+ if (entries->size == t->private->size)
+ ret = copy_entries_to_user(t->private->size,
+ t, uptr->entries);
+ else {
+ duprintf("get_entries: I've got %u not %u!\n",
+ t->private->size,
+ entries->size);
+ ret = -EINVAL;
+ }
+ up(&ip6t_mutex);
+ } else
+ duprintf("get_entries: Can't find %s!\n",
+ entries->name);
+
+ return ret;
+}
+
+static int
+do_replace(void *user, unsigned int len)
+{
+ int ret;
+ struct ip6t_replace tmp;
+ struct ip6t_table *t;
+ struct ip6t_table_info *newinfo, *oldinfo;
+ struct ip6t_counters *counters;
+
+ if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
+ return -EFAULT;
+
+ newinfo = vmalloc(sizeof(struct ip6t_table_info)
+ + SMP_ALIGN(tmp.size) * smp_num_cpus);
+ if (!newinfo)
+ return -ENOMEM;
+
+ if (copy_from_user(newinfo->entries, user + sizeof(tmp),
+ tmp.size) != 0) {
+ ret = -EFAULT;
+ goto free_newinfo;
+ }
+
+ counters = vmalloc(tmp.num_counters * sizeof(struct ip6t_counters));
+ if (!counters) {
+ ret = -ENOMEM;
+ goto free_newinfo;
+ }
+ memset(counters, 0, tmp.num_counters * sizeof(struct ip6t_counters));
+
+ ret = translate_table(tmp.name, tmp.valid_hooks,
+ newinfo, tmp.size, tmp.num_entries,
+ tmp.hook_entry, tmp.underflow);
+ if (ret != 0)
+ goto free_newinfo_counters;
+
+ duprintf("ip_tables: Translated table\n");
+
+ t = find_table_lock(tmp.name, &ret, &ip6t_mutex);
+ if (!t)
+ goto free_newinfo_counters_untrans;
+
+ /* You lied! */
+ if (tmp.valid_hooks != t->valid_hooks) {
+ duprintf("Valid hook crap: %08X vs %08X\n",
+ tmp.valid_hooks, t->valid_hooks);
+ ret = -EINVAL;
+ goto free_newinfo_counters_untrans_unlock;
+ }
+
+ oldinfo = replace_table(t, tmp.num_counters, newinfo, &ret);
+ if (!oldinfo)
+ goto free_newinfo_counters_untrans_unlock;
+
+ /* Get the old counters. */
+ get_counters(oldinfo, counters);
+ /* Decrease module usage counts and free resource */
+ IP6T_ENTRY_ITERATE(oldinfo->entries, oldinfo->size, cleanup_entry,NULL);
+ vfree(oldinfo);
+ /* Silent error: too late now. */
+ copy_to_user(tmp.counters, counters,
+ sizeof(struct ip6t_counters) * tmp.num_counters);
+ vfree(counters);
+ up(&ip6t_mutex);
+ return 0;
+
+ free_newinfo_counters_untrans_unlock:
+ up(&ip6t_mutex);
+ free_newinfo_counters_untrans:
+ IP6T_ENTRY_ITERATE(newinfo->entries, newinfo->size, cleanup_entry,NULL);
+ free_newinfo_counters:
+ vfree(counters);
+ free_newinfo:
+ vfree(newinfo);
+ return ret;
+}
+
+/* We're lazy, and add to the first CPU; overflow works its fey magic
+ * and everything is OK. */
+static inline int
+add_counter_to_entry(struct ip6t_entry *e,
+ const struct ip6t_counters addme[],
+ unsigned int *i)
+{
+#if 0
+ duprintf("add_counter: Entry %u %lu/%lu + %lu/%lu\n",
+ *i,
+ (long unsigned int)e->counters.pcnt,
+ (long unsigned int)e->counters.bcnt,
+ (long unsigned int)addme[*i].pcnt,
+ (long unsigned int)addme[*i].bcnt);
+#endif
+
+ ADD_COUNTER(e->counters, addme[*i].bcnt, addme[*i].pcnt);
+
+ (*i)++;
+ return 0;
+}
+
+static int
+do_add_counters(void *user, unsigned int len)
+{
+ unsigned int i;
+ struct ip6t_counters_info tmp, *paddc;
+ struct ip6t_table *t;
+ int ret;
+
+ if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
+ return -EFAULT;
+
+ if (len != sizeof(tmp) + tmp.num_counters*sizeof(struct ip6t_counters))
+ return -EINVAL;
+
+ paddc = vmalloc(len);
+ if (!paddc)
+ return -ENOMEM;
+
+ if (copy_from_user(paddc, user, len) != 0) {
+ ret = -EFAULT;
+ goto free;
+ }
+
+ t = find_table_lock(tmp.name, &ret, &ip6t_mutex);
+ if (!t)
+ goto free;
+
+ write_lock_bh(&t->lock);
+ if (t->private->number != paddc->num_counters) {
+ ret = -EINVAL;
+ goto unlock_up_free;
+ }
+
+ i = 0;
+ IP6T_ENTRY_ITERATE(t->private->entries,
+ t->private->size,
+ add_counter_to_entry,
+ paddc->counters,
+ &i);
+ unlock_up_free:
+ write_unlock_bh(&t->lock);
+ up(&ip6t_mutex);
+ free:
+ vfree(paddc);
+
+ return ret;
+}
+
+static int
+do_ip6t_set_ctl(struct sock *sk, int cmd, void *user, unsigned int len)
+{
+ int ret;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ switch (cmd) {
+ case IP6T_SO_SET_REPLACE:
+ ret = do_replace(user, len);
+ break;
+
+ case IP6T_SO_SET_ADD_COUNTERS:
+ ret = do_add_counters(user, len);
+ break;
+
+ default:
+ duprintf("do_ip6t_set_ctl: unknown request %i\n", cmd);
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static int
+do_ip6t_get_ctl(struct sock *sk, int cmd, void *user, int *len)
+{
+ int ret;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ switch (cmd) {
+ case IP6T_SO_GET_INFO: {
+ char name[IP6T_TABLE_MAXNAMELEN];
+ struct ip6t_table *t;
+
+ if (*len != sizeof(struct ip6t_getinfo)) {
+ duprintf("length %u != %u\n", *len,
+ sizeof(struct ip6t_getinfo));
+ ret = -EINVAL;
+ break;
+ }
+
+ if (copy_from_user(name, user, sizeof(name)) != 0) {
+ ret = -EFAULT;
+ break;
+ }
+ t = find_table_lock(name, &ret, &ip6t_mutex);
+ if (t) {
+ struct ip6t_getinfo info;
+
+ info.valid_hooks = t->valid_hooks;
+ memcpy(info.hook_entry, t->private->hook_entry,
+ sizeof(info.hook_entry));
+ memcpy(info.underflow, t->private->underflow,
+ sizeof(info.underflow));
+ info.num_entries = t->private->number;
+ info.size = t->private->size;
+ strcpy(info.name, name);
+
+ if (copy_to_user(user, &info, *len) != 0)
+ ret = -EFAULT;
+ else
+ ret = 0;
+
+ up(&ip6t_mutex);
+ }
+ }
+ break;
+
+ case IP6T_SO_GET_ENTRIES: {
+ struct ip6t_get_entries get;
+
+ if (*len < sizeof(get)) {
+ duprintf("get_entries: %u < %u\n", *len, sizeof(get));
+ ret = -EINVAL;
+ } else if (copy_from_user(&get, user, sizeof(get)) != 0) {
+ ret = -EFAULT;
+ } else if (*len != sizeof(struct ip6t_get_entries) + get.size) {
+ duprintf("get_entries: %u != %u\n", *len,
+ sizeof(struct ip6t_get_entries) + get.size);
+ ret = -EINVAL;
+ } else
+ ret = get_entries(&get, user);
+ break;
+ }
+
+ default:
+ duprintf("do_ip6t_get_ctl: unknown request %i\n", cmd);
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+/* Registration hooks for targets. */
+int
+ip6t_register_target(struct ip6t_target *target)
+{
+ int ret;
+
+ MOD_INC_USE_COUNT;
+ ret = down_interruptible(&ip6t_mutex);
+ if (ret != 0)
+ return ret;
+
+ if (!list_named_insert(&ip6t_target, target)) {
+ duprintf("ip6t_register_target: `%s' already in list!\n",
+ target->name);
+ ret = -EINVAL;
+ MOD_DEC_USE_COUNT;
+ }
+ up(&ip6t_mutex);
+ return ret;
+}
+
+void
+ip6t_unregister_target(struct ip6t_target *target)
+{
+ down(&ip6t_mutex);
+ LIST_DELETE(&ip6t_target, target);
+ up(&ip6t_mutex);
+ MOD_DEC_USE_COUNT;
+}
+
+int
+ip6t_register_match(struct ip6t_match *match)
+{
+ int ret;
+
+ MOD_INC_USE_COUNT;
+ ret = down_interruptible(&ip6t_mutex);
+ if (ret != 0) {
+ MOD_DEC_USE_COUNT;
+ return ret;
+ }
+ if (list_named_insert(&ip6t_match, match)) {
+ ret = 0;
+ } else {
+ duprintf("ip6t_register_match: `%s' already in list!\n",
+ match->name);
+ MOD_DEC_USE_COUNT;
+ ret = -EINVAL;
+ }
+ up(&ip6t_mutex);
+
+ return ret;
+}
+
+void
+ip6t_unregister_match(struct ip6t_match *match)
+{
+ down(&ip6t_mutex);
+ LIST_DELETE(&ip6t_match, match);
+ up(&ip6t_mutex);
+ MOD_DEC_USE_COUNT;
+}
+
+int ip6t_register_table(struct ip6t_table *table)
+{
+ int ret;
+ struct ip6t_table_info *newinfo;
+ static struct ip6t_table_info bootstrap
+ = { 0, 0, { 0 }, { 0 }, { }, { } };
+
+ MOD_INC_USE_COUNT;
+ newinfo = vmalloc(sizeof(struct ip6t_table_info)
+ + SMP_ALIGN(table->table->size) * smp_num_cpus);
+ if (!newinfo) {
+ ret = -ENOMEM;
+ MOD_DEC_USE_COUNT;
+ return ret;
+ }
+ memcpy(newinfo->entries, table->table->entries, table->table->size);
+
+ ret = translate_table(table->name, table->valid_hooks,
+ newinfo, table->table->size,
+ table->table->num_entries,
+ table->table->hook_entry,
+ table->table->underflow);
+ if (ret != 0) {
+ vfree(newinfo);
+ MOD_DEC_USE_COUNT;
+ return ret;
+ }
+
+ ret = down_interruptible(&ip6t_mutex);
+ if (ret != 0) {
+ vfree(newinfo);
+ MOD_DEC_USE_COUNT;
+ return ret;
+ }
+
+ /* Don't autoload: we'd eat our tail... */
+ if (list_named_find(&ip6t_tables, table->name)) {
+ ret = -EEXIST;
+ goto free_unlock;
+ }
+
+ /* Simplifies replace_table code. */
+ table->private = &bootstrap;
+ if (!replace_table(table, 0, newinfo, &ret))
+ goto free_unlock;
+
+ duprintf("table->private->number = %u\n",
+ table->private->number);
+
+ table->lock = RW_LOCK_UNLOCKED;
+ list_prepend(&ip6t_tables, table);
+
+ unlock:
+ up(&ip6t_mutex);
+ return ret;
+
+ free_unlock:
+ vfree(newinfo);
+ MOD_DEC_USE_COUNT;
+ goto unlock;
+}
+
+void ip6t_unregister_table(struct ip6t_table *table)
+{
+ down(&ip6t_mutex);
+ LIST_DELETE(&ip6t_tables, table);
+ up(&ip6t_mutex);
+
+ /* Decrease module usage counts and free resources */
+ IP6T_ENTRY_ITERATE(table->private->entries, table->private->size,
+ cleanup_entry, NULL);
+ vfree(table->private);
+ MOD_DEC_USE_COUNT;
+}
+
+/* Returns 1 if the port is matched by the range, 0 otherwise */
+static inline int
+port_match(u_int16_t min, u_int16_t max, u_int16_t port, int invert)
+{
+ int ret;
+
+ ret = (port >= min && port <= max) ^ invert;
+ return ret;
+}
+
+static int
+tcp_find_option(u_int8_t option,
+ const struct tcphdr *tcp,
+ u_int16_t datalen,
+ int invert,
+ int *hotdrop)
+{
+ unsigned int i = sizeof(struct tcphdr);
+ const u_int8_t *opt = (u_int8_t *)tcp;
+
+ duprintf("tcp_match: finding option\n");
+ /* If we don't have the whole header, drop packet. */
+ if (tcp->doff * 4 > datalen) {
+ *hotdrop = 1;
+ return 0;
+ }
+
+ while (i < tcp->doff * 4) {
+ if (opt[i] == option) return !invert;
+ if (opt[i] < 2) i++;
+ else i += opt[i+1]?:1;
+ }
+
+ return invert;
+}
+
+static int
+tcp_match(const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const void *matchinfo,
+ int offset,
+ const void *hdr,
+ u_int16_t datalen,
+ int *hotdrop)
+{
+ const struct tcphdr *tcp = hdr;
+ const struct ip6t_tcp *tcpinfo = matchinfo;
+
+ /* To quote Alan:
+
+ Don't allow a fragment of TCP 8 bytes in. Nobody normal
+ causes this. Its a cracker trying to break in by doing a
+ flag overwrite to pass the direction checks.
+ */
+
+ if (offset == 1) {
+ duprintf("Dropping evil TCP offset=1 frag.\n");
+ *hotdrop = 1;
+ return 0;
+ } else if (offset == 0 && datalen < sizeof(struct tcphdr)) {
+ /* We've been asked to examine this packet, and we
+ can't. Hence, no choice but to drop. */
+ duprintf("Dropping evil TCP offset=0 tinygram.\n");
+ *hotdrop = 1;
+ return 0;
+ }
+
+ /* FIXME: Try tcp doff >> packet len against various stacks --RR */
+
+#define FWINVTCP(bool,invflg) ((bool) ^ !!(tcpinfo->invflags & invflg))
+
+ /* Must not be a fragment. */
+ return !offset
+ && port_match(tcpinfo->spts[0], tcpinfo->spts[1],
+ ntohs(tcp->source),
+ !!(tcpinfo->invflags & IP6T_TCP_INV_SRCPT))
+ && port_match(tcpinfo->dpts[0], tcpinfo->dpts[1],
+ ntohs(tcp->dest),
+ !!(tcpinfo->invflags & IP6T_TCP_INV_DSTPT))
+ && FWINVTCP((((unsigned char *)tcp)[13]
+ & tcpinfo->flg_mask)
+ == tcpinfo->flg_cmp,
+ IP6T_TCP_INV_FLAGS)
+ && (!tcpinfo->option
+ || tcp_find_option(tcpinfo->option, tcp, datalen,
+ tcpinfo->invflags
+ & IP6T_TCP_INV_OPTION,
+ hotdrop));
+}
+
+/* Called when user tries to insert an entry of this type. */
+static int
+tcp_checkentry(const char *tablename,
+ const struct ip6t_ip6 *ipv6,
+ void *matchinfo,
+ unsigned int matchsize,
+ unsigned int hook_mask)
+{
+ const struct ip6t_tcp *tcpinfo = matchinfo;
+
+ /* Must specify proto == TCP, and no unknown invflags */
+ return ipv6->proto == IPPROTO_TCP
+ && !(ipv6->invflags & IP6T_INV_PROTO)
+ && matchsize == IP6T_ALIGN(sizeof(struct ip6t_tcp))
+ && !(tcpinfo->invflags & ~IP6T_TCP_INV_MASK);
+}
+
+static int
+udp_match(const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const void *matchinfo,
+ int offset,
+ const void *hdr,
+ u_int16_t datalen,
+ int *hotdrop)
+{
+ const struct udphdr *udp = hdr;
+ const struct ip6t_udp *udpinfo = matchinfo;
+
+ if (offset == 0 && datalen < sizeof(struct udphdr)) {
+ /* We've been asked to examine this packet, and we
+ can't. Hence, no choice but to drop. */
+ duprintf("Dropping evil UDP tinygram.\n");
+ *hotdrop = 1;
+ return 0;
+ }
+
+ /* Must not be a fragment. */
+ return !offset
+ && port_match(udpinfo->spts[0], udpinfo->spts[1],
+ ntohs(udp->source),
+ !!(udpinfo->invflags & IP6T_UDP_INV_SRCPT))
+ && port_match(udpinfo->dpts[0], udpinfo->dpts[1],
+ ntohs(udp->dest),
+ !!(udpinfo->invflags & IP6T_UDP_INV_DSTPT));
+}
+
+/* Called when user tries to insert an entry of this type. */
+static int
+udp_checkentry(const char *tablename,
+ const struct ip6t_ip6 *ipv6,
+ void *matchinfo,
+ unsigned int matchinfosize,
+ unsigned int hook_mask)
+{
+ const struct ip6t_udp *udpinfo = matchinfo;
+
+ /* Must specify proto == UDP, and no unknown invflags */
+ if (ipv6->proto != IPPROTO_UDP || (ipv6->invflags & IP6T_INV_PROTO)) {
+ duprintf("ip6t_udp: Protocol %u != %u\n", ipv6->proto,
+ IPPROTO_UDP);
+ return 0;
+ }
+ if (matchinfosize != IP6T_ALIGN(sizeof(struct ip6t_udp))) {
+ duprintf("ip6t_udp: matchsize %u != %u\n",
+ matchinfosize, IP6T_ALIGN(sizeof(struct ip6t_udp)));
+ return 0;
+ }
+ if (udpinfo->invflags & ~IP6T_UDP_INV_MASK) {
+ duprintf("ip6t_udp: unknown flags %X\n",
+ udpinfo->invflags);
+ return 0;
+ }
+
+ return 1;
+}
+
+/* Returns 1 if the type and code is matched by the range, 0 otherwise */
+static inline int
+icmp_type_code_match(u_int8_t test_type, u_int8_t min_code, u_int8_t max_code,
+ u_int8_t type, u_int8_t code,
+ int invert)
+{
+ return (type == test_type && code >= min_code && code <= max_code)
+ ^ invert;
+}
+
+static int
+icmp_match(const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const void *matchinfo,
+ int offset,
+ const void *hdr,
+ u_int16_t datalen,
+ int *hotdrop)
+{
+ const struct icmphdr *icmp = hdr;
+ const struct ip6t_icmp *icmpinfo = matchinfo;
+
+ if (offset == 0 && datalen < 2) {
+ /* We've been asked to examine this packet, and we
+ can't. Hence, no choice but to drop. */
+ duprintf("Dropping evil ICMP tinygram.\n");
+ *hotdrop = 1;
+ return 0;
+ }
+
+ /* Must not be a fragment. */
+ return !offset
+ && icmp_type_code_match(icmpinfo->type,
+ icmpinfo->code[0],
+ icmpinfo->code[1],
+ icmp->type, icmp->code,
+ !!(icmpinfo->invflags&IP6T_ICMP_INV));
+}
+
+/* Called when user tries to insert an entry of this type. */
+static int
+icmp_checkentry(const char *tablename,
+ const struct ip6t_ip6 *ipv6,
+ void *matchinfo,
+ unsigned int matchsize,
+ unsigned int hook_mask)
+{
+ const struct ip6t_icmp *icmpinfo = matchinfo;
+
+ /* Must specify proto == ICMP, and no unknown invflags */
+ return ipv6->proto == IPPROTO_ICMP
+ && !(ipv6->invflags & IP6T_INV_PROTO)
+ && matchsize == IP6T_ALIGN(sizeof(struct ip6t_icmp))
+ && !(icmpinfo->invflags & ~IP6T_ICMP_INV);
+}
+
+/* The built-in targets: standard (NULL) and error. */
+static struct ip6t_target ip6t_standard_target
+= { { NULL, NULL }, IP6T_STANDARD_TARGET, NULL, NULL, NULL };
+static struct ip6t_target ip6t_error_target
+= { { NULL, NULL }, IP6T_ERROR_TARGET, ip6t_error, NULL, NULL };
+
+static struct nf_sockopt_ops ip6t_sockopts
+= { { NULL, NULL }, PF_INET6, IP6T_BASE_CTL, IP6T_SO_SET_MAX+1, do_ip6t_set_ctl,
+ IP6T_BASE_CTL, IP6T_SO_GET_MAX+1, do_ip6t_get_ctl, 0, NULL };
+
+static struct ip6t_match tcp_matchstruct
+= { { NULL, NULL }, "tcp", &tcp_match, &tcp_checkentry, NULL };
+static struct ip6t_match udp_matchstruct
+= { { NULL, NULL }, "udp", &udp_match, &udp_checkentry, NULL };
+static struct ip6t_match icmp_matchstruct
+= { { NULL, NULL }, "icmp", &icmp_match, &icmp_checkentry, NULL };
+
+#ifdef CONFIG_PROC_FS
+static inline int print_name(const struct ip6t_table *t,
+ off_t start_offset, char *buffer, int length,
+ off_t *pos, unsigned int *count)
+{
+ if ((*count)++ >= start_offset) {
+ unsigned int namelen;
+
+ namelen = sprintf(buffer + *pos, "%s\n", t->name);
+ if (*pos + namelen > length) {
+ /* Stop iterating */
+ return 1;
+ }
+ *pos += namelen;
+ }
+ return 0;
+}
+
+static int ip6t_get_tables(char *buffer, char **start, off_t offset, int length)
+{
+ off_t pos = 0;
+ unsigned int count = 0;
+
+ if (down_interruptible(&ip6t_mutex) != 0)
+ return 0;
+
+ LIST_FIND(&ip6t_tables, print_name, struct ip6t_table *,
+ offset, buffer, length, &pos, &count);
+
+ up(&ip6t_mutex);
+
+ /* `start' hack - see fs/proc/generic.c line ~105 */
+ *start=(char *)((unsigned long)count-offset);
+ return pos;
+}
+#endif /*CONFIG_PROC_FS*/
+
+static int __init init(void)
+{
+ int ret;
+
+ /* Noone else will be downing sem now, so we won't sleep */
+ down(&ip6t_mutex);
+ list_append(&ip6t_target, &ip6t_standard_target);
+ list_append(&ip6t_target, &ip6t_error_target);
+ list_append(&ip6t_match, &tcp_matchstruct);
+ list_append(&ip6t_match, &udp_matchstruct);
+ list_append(&ip6t_match, &icmp_matchstruct);
+ up(&ip6t_mutex);
+
+ /* Register setsockopt */
+ ret = nf_register_sockopt(&ip6t_sockopts);
+ if (ret < 0) {
+ duprintf("Unable to register sockopts.\n");
+ return ret;
+ }
+
+#ifdef CONFIG_PROC_FS
+ if (!proc_net_create("ip6_tables_names", 0, ip6t_get_tables)) {
+ nf_unregister_sockopt(&ip6t_sockopts);
+ return -ENOMEM;
+ }
+#endif
+
+ printk("ip6_tables: (c)2000 Netfilter core team\n");
+ return 0;
+}
+
+static void __exit fini(void)
+{
+ nf_unregister_sockopt(&ip6t_sockopts);
+#ifdef CONFIG_PROC_FS
+ proc_net_remove("ip6_tables_names");
+#endif
+}
+
+module_init(init);
+module_exit(fini);
diff --git a/net/ipv6/netfilter/ip6t_MARK.c b/net/ipv6/netfilter/ip6t_MARK.c
new file mode 100644
index 000000000..dd8bb3226
--- /dev/null
+++ b/net/ipv6/netfilter/ip6t_MARK.c
@@ -0,0 +1,66 @@
+/* This is a module which is used for setting the NFMARK field of an skb. */
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <net/checksum.h>
+
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ipt_MARK.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)
+{
+ const struct ipt_mark_target_info *markinfo = targinfo;
+
+ if((*pskb)->nfmark != markinfo->mark) {
+ (*pskb)->nfmark = markinfo->mark;
+ (*pskb)->nfcache |= NFC_ALTERED;
+ }
+ 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 != IPT_ALIGN(sizeof(struct ipt_mark_target_info))) {
+ printk(KERN_WARNING "MARK: targinfosize %u != %Zu\n",
+ targinfosize,
+ IPT_ALIGN(sizeof(struct ipt_mark_target_info)));
+ return 0;
+ }
+
+ if (strcmp(tablename, "mangle") != 0) {
+ printk(KERN_WARNING "MARK: can only be called from \"mangle\" table, not \"%s\"\n", tablename);
+ return 0;
+ }
+
+ return 1;
+}
+
+static struct ipt_target ipt_mark_reg
+= { { NULL, NULL }, "MARK", target, checkentry, NULL, THIS_MODULE };
+
+static int __init init(void)
+{
+ if (ipt_register_target(&ipt_mark_reg))
+ return -EINVAL;
+
+ return 0;
+}
+
+static void __exit fini(void)
+{
+ ipt_unregister_target(&ipt_mark_reg);
+}
+
+module_init(init);
+module_exit(fini);
diff --git a/net/ipv6/netfilter/ip6t_limit.c b/net/ipv6/netfilter/ip6t_limit.c
new file mode 100644
index 000000000..0d79a9a8b
--- /dev/null
+++ b/net/ipv6/netfilter/ip6t_limit.c
@@ -0,0 +1,135 @@
+/* Kernel module to control the rate
+ *
+ * Jérôme de Vivie <devivie@info.enserb.u-bordeaux.fr>
+ * Hervé Eychenne <eychenne@info.enserb.u-bordeaux.fr>
+ *
+ * 2 September 1999: Changed from the target RATE to the match
+ * `limit', removed logging. Did I mention that
+ * Alexey is a fucking genius?
+ * Rusty Russell (rusty@rustcorp.com.au). */
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+
+#include <linux/netfilter_ipv6/ip6_tables.h>
+#include <linux/netfilter_ipv4/ipt_limit.h>
+
+/* The algorithm used is the Simple Token Bucket Filter (TBF)
+ * see net/sched/sch_tbf.c in the linux source tree
+ */
+
+static spinlock_t limit_lock = SPIN_LOCK_UNLOCKED;
+
+/* Rusty: This is my (non-mathematically-inclined) understanding of
+ this algorithm. The `average rate' in jiffies becomes your initial
+ amount of credit `credit' and the most credit you can ever have
+ `credit_cap'. The `peak rate' becomes the cost of passing the
+ test, `cost'.
+
+ `prev' tracks the last packet hit: you gain one credit per jiffy.
+ If you get credit balance more than this, the extra credit is
+ discarded. Every time the match passes, you lose `cost' credits;
+ if you don't have that many, the test fails.
+
+ See Alexey's formal explanation in net/sched/sch_tbf.c.
+
+ To avoid underflow, we multiply by 128 (ie. you get 128 credits per
+ jiffy). Hence a cost of 2^32-1, means one pass per 32768 seconds
+ at 1024HZ (or one every 9 hours). A cost of 1 means 12800 passes
+ per second at 100HZ. */
+
+#define CREDITS_PER_JIFFY 128
+
+static int
+ipt_limit_match(const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const void *matchinfo,
+ int offset,
+ const void *hdr,
+ u_int16_t datalen,
+ int *hotdrop)
+{
+ struct ipt_rateinfo *r = ((struct ipt_rateinfo *)matchinfo)->master;
+ unsigned long now = jiffies;
+
+ spin_lock_bh(&limit_lock);
+ r->credit += (now - xchg(&r->prev, now)) * CREDITS_PER_JIFFY;
+ if (r->credit > r->credit_cap)
+ r->credit = r->credit_cap;
+
+ if (r->credit >= r->cost) {
+ /* We're not limited. */
+ r->credit -= r->cost;
+ spin_unlock_bh(&limit_lock);
+ return 1;
+ }
+
+ spin_unlock_bh(&limit_lock);
+ return 0;
+}
+
+/* Precision saver. */
+static u_int32_t
+user2credits(u_int32_t user)
+{
+ /* If multiplying would overflow... */
+ if (user > 0xFFFFFFFF / (HZ*CREDITS_PER_JIFFY))
+ /* Divide first. */
+ return (user / IPT_LIMIT_SCALE) * HZ * CREDITS_PER_JIFFY;
+
+ return (user * HZ * CREDITS_PER_JIFFY) / IPT_LIMIT_SCALE;
+}
+
+static int
+ipt_limit_checkentry(const char *tablename,
+ const struct ip6t_ip6 *ip,
+ void *matchinfo,
+ unsigned int matchsize,
+ unsigned int hook_mask)
+{
+ struct ipt_rateinfo *r = matchinfo;
+
+ if (matchsize != IP6T_ALIGN(sizeof(struct ipt_rateinfo)))
+ return 0;
+
+ /* Check for overflow. */
+ if (r->burst == 0
+ || user2credits(r->avg * r->burst) < user2credits(r->avg)) {
+ printk("Call rusty: overflow in ipt_limit: %u/%u\n",
+ r->avg, r->burst);
+ return 0;
+ }
+
+ /* User avg in seconds * IPT_LIMIT_SCALE: convert to jiffies *
+ 128. */
+ r->prev = jiffies;
+ r->credit = user2credits(r->avg * r->burst); /* Credits full. */
+ r->credit_cap = user2credits(r->avg * r->burst); /* Credits full. */
+ r->cost = user2credits(r->avg);
+
+ /* For SMP, we only want to use one set of counters. */
+ r->master = r;
+
+ return 1;
+}
+
+static struct ip6t_match ipt_limit_reg
+= { { NULL, NULL }, "limit", ipt_limit_match, ipt_limit_checkentry, NULL,
+ THIS_MODULE };
+
+static int __init init(void)
+{
+ if (ip6t_register_match(&ipt_limit_reg))
+ return -EINVAL;
+ return 0;
+}
+
+static void __exit fini(void)
+{
+ ip6t_unregister_match(&ipt_limit_reg);
+}
+
+module_init(init);
+module_exit(fini);
diff --git a/net/ipv6/netfilter/ip6t_mark.c b/net/ipv6/netfilter/ip6t_mark.c
new file mode 100644
index 000000000..babe202a4
--- /dev/null
+++ b/net/ipv6/netfilter/ip6t_mark.c
@@ -0,0 +1,50 @@
+/* Kernel module to match NFMARK values. */
+#include <linux/module.h>
+#include <linux/skbuff.h>
+
+#include <linux/netfilter_ipv4/ipt_mark.h>
+#include <linux/netfilter_ipv6/ip6_tables.h>
+
+static int
+match(const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const void *matchinfo,
+ int offset,
+ const void *hdr,
+ u_int16_t datalen,
+ int *hotdrop)
+{
+ const struct ipt_mark_info *info = matchinfo;
+
+ return ((skb->nfmark & info->mask) == info->mark) ^ info->invert;
+}
+
+static int
+checkentry(const char *tablename,
+ const struct ip6t_ip6 *ip,
+ void *matchinfo,
+ unsigned int matchsize,
+ unsigned int hook_mask)
+{
+ if (matchsize != IP6T_ALIGN(sizeof(struct ipt_mark_info)))
+ return 0;
+
+ return 1;
+}
+
+static struct ip6t_match mark_match
+= { { NULL, NULL }, "mark", &match, &checkentry, NULL, THIS_MODULE };
+
+static int __init init(void)
+{
+ return ip6t_register_match(&mark_match);
+}
+
+static void __exit fini(void)
+{
+ ip6t_unregister_match(&mark_match);
+}
+
+module_init(init);
+module_exit(fini);
diff --git a/net/ipv6/netfilter/ip6table_filter.c b/net/ipv6/netfilter/ip6table_filter.c
new file mode 100644
index 000000000..cc4038385
--- /dev/null
+++ b/net/ipv6/netfilter/ip6table_filter.c
@@ -0,0 +1,183 @@
+/*
+ * This is the 1999 rewrite of IP Firewalling, aiming for kernel 2.3.x.
+ *
+ * Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling
+ */
+#include <linux/module.h>
+#include <linux/netfilter_ipv6/ip6_tables.h>
+
+#define FILTER_VALID_HOOKS ((1 << NF_IP6_LOCAL_IN) | (1 << NF_IP6_FORWARD) | (1 << NF_IP6_LOCAL_OUT))
+
+/* 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[3];
+ struct ip6t_error term;
+} initial_table __initdata
+= { { "filter", FILTER_VALID_HOOKS, 4,
+ sizeof(struct ip6t_standard) * 3 + sizeof(struct ip6t_error),
+ { [NF_IP6_LOCAL_IN] 0,
+ [NF_IP6_FORWARD] sizeof(struct ip6t_standard),
+ [NF_IP6_LOCAL_OUT] sizeof(struct ip6t_standard) * 2 },
+ { [NF_IP6_LOCAL_IN] 0,
+ [NF_IP6_FORWARD] sizeof(struct ip6t_standard),
+ [NF_IP6_LOCAL_OUT] sizeof(struct ip6t_standard) * 2 },
+ 0, NULL, { } },
+ {
+ /* LOCAL_IN */
+ { { { { 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 } },
+ /* FORWARD */
+ { { { { 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_filter
+= { { NULL, NULL }, "filter", &initial_table.repl,
+ FILTER_VALID_HOOKS, RW_LOCK_UNLOCKED, NULL };
+
+/* 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_filter, NULL);
+}
+
+static unsigned int
+ip6t_local_out_hook(unsigned int hook,
+ struct sk_buff **pskb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+#if 0
+ /* root is playing with raw sockets. */
+ if ((*pskb)->len < sizeof(struct iphdr)
+ || (*pskb)->nh.iph->ihl * 4 < sizeof(struct iphdr)) {
+ if (net_ratelimit())
+ printk("ip6t_hook: happy cracking.\n");
+ return NF_ACCEPT;
+ }
+#endif
+
+ return ip6t_do_table(pskb, hook, in, out, &packet_filter, NULL);
+}
+
+static struct nf_hook_ops ip6t_ops[]
+= { { { NULL, NULL }, ip6t_hook, PF_INET6, NF_IP6_LOCAL_IN, NF_IP6_PRI_FILTER },
+ { { NULL, NULL }, ip6t_hook, PF_INET6, NF_IP6_FORWARD, NF_IP6_PRI_FILTER },
+ { { NULL, NULL }, ip6t_local_out_hook, PF_INET6, NF_IP6_LOCAL_OUT,
+ NF_IP6_PRI_FILTER }
+};
+
+/* Default to forward because I got too much mail already. */
+static int forward = NF_ACCEPT;
+MODULE_PARM(forward, "i");
+
+static int __init init(void)
+{
+ int ret;
+
+ if (forward < 0 || forward > NF_MAX_VERDICT) {
+ printk("iptables forward must be 0 or 1\n");
+ return -EINVAL;
+ }
+
+ /* Entry 1 is the FORWARD hook */
+ initial_table.entries[1].target.verdict = -forward - 1;
+
+ /* Register table */
+ ret = ip6t_register_table(&packet_filter);
+ 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;
+
+ ret = nf_register_hook(&ip6t_ops[2]);
+ if (ret < 0)
+ goto cleanup_hook1;
+
+ return ret;
+
+ cleanup_hook1:
+ nf_unregister_hook(&ip6t_ops[1]);
+ cleanup_hook0:
+ nf_unregister_hook(&ip6t_ops[0]);
+ cleanup_table:
+ ip6t_unregister_table(&packet_filter);
+
+ 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_filter);
+}
+
+module_init(init);
+module_exit(fini);
diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c
index b8c0a7be8..7eb578a60 100644
--- a/net/sunrpc/auth.c
+++ b/net/sunrpc/auth.c
@@ -84,6 +84,11 @@ rpcauth_init_credcache(struct rpc_auth *auth)
static inline void
rpcauth_crdestroy(struct rpc_auth *auth, struct rpc_cred *cred)
{
+#ifdef RPC_DEBUG
+ if (cred->cr_magic != RPCAUTH_CRED_MAGIC)
+ BUG();
+ cred->cr_magic = 0;
+#endif
if (auth->au_ops->crdestroy)
auth->au_ops->crdestroy(cred);
else
@@ -190,8 +195,13 @@ rpcauth_lookup_credcache(struct rpc_auth *auth, int taskflags)
}
spin_unlock(&rpc_credcache_lock);
- if (!cred)
+ if (!cred) {
cred = auth->au_ops->crcreate(taskflags);
+#ifdef RPC_DEBUG
+ if (cred)
+ cred->cr_magic = RPCAUTH_CRED_MAGIC;
+#endif
+ }
if (cred)
rpcauth_insert_credcache(auth, cred);
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 973e8435c..0a2a58c34 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -8,7 +8,7 @@
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
- * Version: $Id: af_unix.c,v 1.95 2000/05/09 04:48:37 davem Exp $
+ * Version: $Id: af_unix.c,v 1.96 2000/05/12 23:51:26 davem Exp $
*
* Fixes:
* Linus Torvalds : Assorted bug cures.
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-19 23:53:52 +0000