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-rw-r--r--net/bridge/netfilter/Kconfig9
-rw-r--r--net/bridge/netfilter/Makefile1
-rw-r--r--net/bridge/netfilter/ebt_ip6.c144
-rw-r--r--net/bridge/netfilter/ebt_log.c64
4 files changed, 202 insertions, 16 deletions
diff --git a/net/bridge/netfilter/Kconfig b/net/bridge/netfilter/Kconfig
index 7beeefa0f9c0..fb684c2ff8b6 100644
--- a/net/bridge/netfilter/Kconfig
+++ b/net/bridge/netfilter/Kconfig
@@ -83,6 +83,15 @@ config BRIDGE_EBT_IP
To compile it as a module, choose M here. If unsure, say N.
+config BRIDGE_EBT_IP6
+ tristate "ebt: IP6 filter support"
+ depends on BRIDGE_NF_EBTABLES
+ help
+ This option adds the IP6 match, which allows basic IPV6 header field
+ filtering.
+
+ To compile it as a module, choose M here. If unsure, say N.
+
config BRIDGE_EBT_LIMIT
tristate "ebt: limit match support"
depends on BRIDGE_NF_EBTABLES
diff --git a/net/bridge/netfilter/Makefile b/net/bridge/netfilter/Makefile
index 83715d73a503..dd960645b413 100644
--- a/net/bridge/netfilter/Makefile
+++ b/net/bridge/netfilter/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_BRIDGE_EBT_802_3) += ebt_802_3.o
obj-$(CONFIG_BRIDGE_EBT_AMONG) += ebt_among.o
obj-$(CONFIG_BRIDGE_EBT_ARP) += ebt_arp.o
obj-$(CONFIG_BRIDGE_EBT_IP) += ebt_ip.o
+obj-$(CONFIG_BRIDGE_EBT_IP) += ebt_ip6.o
obj-$(CONFIG_BRIDGE_EBT_LIMIT) += ebt_limit.o
obj-$(CONFIG_BRIDGE_EBT_MARK) += ebt_mark_m.o
obj-$(CONFIG_BRIDGE_EBT_PKTTYPE) += ebt_pkttype.o
diff --git a/net/bridge/netfilter/ebt_ip6.c b/net/bridge/netfilter/ebt_ip6.c
new file mode 100644
index 000000000000..36efb3a75249
--- /dev/null
+++ b/net/bridge/netfilter/ebt_ip6.c
@@ -0,0 +1,144 @@
+/*
+ * ebt_ip6
+ *
+ * Authors:
+ * Manohar Castelino <manohar.r.castelino@intel.com>
+ * Kuo-Lang Tseng <kuo-lang.tseng@intel.com>
+ * Jan Engelhardt <jengelh@computergmbh.de>
+ *
+ * Summary:
+ * This is just a modification of the IPv4 code written by
+ * Bart De Schuymer <bdschuym@pandora.be>
+ * with the changes required to support IPv6
+ *
+ * Jan, 2008
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_ip6.h>
+#include <linux/ipv6.h>
+#include <net/ipv6.h>
+#include <linux/in.h>
+#include <linux/module.h>
+#include <net/dsfield.h>
+
+struct tcpudphdr {
+ __be16 src;
+ __be16 dst;
+};
+
+static int ebt_filter_ip6(const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out, const void *data,
+ unsigned int datalen)
+{
+ const struct ebt_ip6_info *info = (struct ebt_ip6_info *)data;
+ const struct ipv6hdr *ih6;
+ struct ipv6hdr _ip6h;
+ const struct tcpudphdr *pptr;
+ struct tcpudphdr _ports;
+ struct in6_addr tmp_addr;
+ int i;
+
+ ih6 = skb_header_pointer(skb, 0, sizeof(_ip6h), &_ip6h);
+ if (ih6 == NULL)
+ return EBT_NOMATCH;
+ if (info->bitmask & EBT_IP6_TCLASS &&
+ FWINV(info->tclass != ipv6_get_dsfield(ih6), EBT_IP6_TCLASS))
+ return EBT_NOMATCH;
+ for (i = 0; i < 4; i++)
+ tmp_addr.in6_u.u6_addr32[i] = ih6->saddr.in6_u.u6_addr32[i] &
+ info->smsk.in6_u.u6_addr32[i];
+ if (info->bitmask & EBT_IP6_SOURCE &&
+ FWINV((ipv6_addr_cmp(&tmp_addr, &info->saddr) != 0),
+ EBT_IP6_SOURCE))
+ return EBT_NOMATCH;
+ for (i = 0; i < 4; i++)
+ tmp_addr.in6_u.u6_addr32[i] = ih6->daddr.in6_u.u6_addr32[i] &
+ info->dmsk.in6_u.u6_addr32[i];
+ if (info->bitmask & EBT_IP6_DEST &&
+ FWINV((ipv6_addr_cmp(&tmp_addr, &info->daddr) != 0), EBT_IP6_DEST))
+ return EBT_NOMATCH;
+ if (info->bitmask & EBT_IP6_PROTO) {
+ uint8_t nexthdr = ih6->nexthdr;
+ int offset_ph;
+
+ offset_ph = ipv6_skip_exthdr(skb, sizeof(_ip6h), &nexthdr);
+ if (offset_ph == -1)
+ return EBT_NOMATCH;
+ if (FWINV(info->protocol != nexthdr, EBT_IP6_PROTO))
+ return EBT_NOMATCH;
+ if (!(info->bitmask & EBT_IP6_DPORT) &&
+ !(info->bitmask & EBT_IP6_SPORT))
+ return EBT_MATCH;
+ pptr = skb_header_pointer(skb, offset_ph, sizeof(_ports),
+ &_ports);
+ if (pptr == NULL)
+ return EBT_NOMATCH;
+ if (info->bitmask & EBT_IP6_DPORT) {
+ u32 dst = ntohs(pptr->dst);
+ if (FWINV(dst < info->dport[0] ||
+ dst > info->dport[1], EBT_IP6_DPORT))
+ return EBT_NOMATCH;
+ }
+ if (info->bitmask & EBT_IP6_SPORT) {
+ u32 src = ntohs(pptr->src);
+ if (FWINV(src < info->sport[0] ||
+ src > info->sport[1], EBT_IP6_SPORT))
+ return EBT_NOMATCH;
+ }
+ return EBT_MATCH;
+ }
+ return EBT_MATCH;
+}
+
+static int ebt_ip6_check(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+ struct ebt_ip6_info *info = (struct ebt_ip6_info *)data;
+
+ if (datalen != EBT_ALIGN(sizeof(struct ebt_ip6_info)))
+ return -EINVAL;
+ if (e->ethproto != htons(ETH_P_IPV6) || e->invflags & EBT_IPROTO)
+ return -EINVAL;
+ if (info->bitmask & ~EBT_IP6_MASK || info->invflags & ~EBT_IP6_MASK)
+ return -EINVAL;
+ if (info->bitmask & (EBT_IP6_DPORT | EBT_IP6_SPORT)) {
+ if (info->invflags & EBT_IP6_PROTO)
+ return -EINVAL;
+ if (info->protocol != IPPROTO_TCP &&
+ info->protocol != IPPROTO_UDP &&
+ info->protocol != IPPROTO_UDPLITE &&
+ info->protocol != IPPROTO_SCTP &&
+ info->protocol != IPPROTO_DCCP)
+ return -EINVAL;
+ }
+ if (info->bitmask & EBT_IP6_DPORT && info->dport[0] > info->dport[1])
+ return -EINVAL;
+ if (info->bitmask & EBT_IP6_SPORT && info->sport[0] > info->sport[1])
+ return -EINVAL;
+ return 0;
+}
+
+static struct ebt_match filter_ip6 =
+{
+ .name = EBT_IP6_MATCH,
+ .match = ebt_filter_ip6,
+ .check = ebt_ip6_check,
+ .me = THIS_MODULE,
+};
+
+static int __init ebt_ip6_init(void)
+{
+ return ebt_register_match(&filter_ip6);
+}
+
+static void __exit ebt_ip6_fini(void)
+{
+ ebt_unregister_match(&filter_ip6);
+}
+
+module_init(ebt_ip6_init);
+module_exit(ebt_ip6_fini);
+MODULE_DESCRIPTION("Ebtables: IPv6 protocol packet match");
+MODULE_LICENSE("GPL");
diff --git a/net/bridge/netfilter/ebt_log.c b/net/bridge/netfilter/ebt_log.c
index 0b209e4aad0a..c883ec8a28b4 100644
--- a/net/bridge/netfilter/ebt_log.c
+++ b/net/bridge/netfilter/ebt_log.c
@@ -18,6 +18,9 @@
#include <linux/if_arp.h>
#include <linux/spinlock.h>
#include <net/netfilter/nf_log.h>
+#include <linux/ipv6.h>
+#include <net/ipv6.h>
+#include <linux/in6.h>
static DEFINE_SPINLOCK(ebt_log_lock);
@@ -58,6 +61,27 @@ static void print_MAC(const unsigned char *p)
printk("%02x%c", *p, i == ETH_ALEN - 1 ? ' ':':');
}
+static void
+print_ports(const struct sk_buff *skb, uint8_t protocol, int offset)
+{
+ if (protocol == IPPROTO_TCP ||
+ protocol == IPPROTO_UDP ||
+ protocol == IPPROTO_UDPLITE ||
+ protocol == IPPROTO_SCTP ||
+ protocol == IPPROTO_DCCP) {
+ const struct tcpudphdr *pptr;
+ struct tcpudphdr _ports;
+
+ pptr = skb_header_pointer(skb, offset,
+ sizeof(_ports), &_ports);
+ if (pptr == NULL) {
+ printk(" INCOMPLETE TCP/UDP header");
+ return;
+ }
+ printk(" SPT=%u DPT=%u", ntohs(pptr->src), ntohs(pptr->dst));
+ }
+}
+
#define myNIPQUAD(a) a[0], a[1], a[2], a[3]
static void
ebt_log_packet(unsigned int pf, unsigned int hooknum,
@@ -95,23 +119,31 @@ ebt_log_packet(unsigned int pf, unsigned int hooknum,
printk(" IP SRC=%u.%u.%u.%u IP DST=%u.%u.%u.%u, IP "
"tos=0x%02X, IP proto=%d", NIPQUAD(ih->saddr),
NIPQUAD(ih->daddr), ih->tos, ih->protocol);
- if (ih->protocol == IPPROTO_TCP ||
- ih->protocol == IPPROTO_UDP ||
- ih->protocol == IPPROTO_UDPLITE ||
- ih->protocol == IPPROTO_SCTP ||
- ih->protocol == IPPROTO_DCCP) {
- const struct tcpudphdr *pptr;
- struct tcpudphdr _ports;
-
- pptr = skb_header_pointer(skb, ih->ihl*4,
- sizeof(_ports), &_ports);
- if (pptr == NULL) {
- printk(" INCOMPLETE TCP/UDP header");
- goto out;
- }
- printk(" SPT=%u DPT=%u", ntohs(pptr->src),
- ntohs(pptr->dst));
+ print_ports(skb, ih->protocol, ih->ihl*4);
+ goto out;
+ }
+
+ if ((bitmask & EBT_LOG_IP6) && eth_hdr(skb)->h_proto ==
+ htons(ETH_P_IPV6)) {
+ const struct ipv6hdr *ih;
+ struct ipv6hdr _iph;
+ uint8_t nexthdr;
+ int offset_ph;
+
+ ih = skb_header_pointer(skb, 0, sizeof(_iph), &_iph);
+ if (ih == NULL) {
+ printk(" INCOMPLETE IPv6 header");
+ goto out;
}
+ printk(" IPv6 SRC=%x:%x:%x:%x:%x:%x:%x:%x "
+ "IPv6 DST=%x:%x:%x:%x:%x:%x:%x:%x, IPv6 "
+ "priority=0x%01X, Next Header=%d", NIP6(ih->saddr),
+ NIP6(ih->daddr), ih->priority, ih->nexthdr);
+ nexthdr = ih->nexthdr;
+ offset_ph = ipv6_skip_exthdr(skb, sizeof(_iph), &nexthdr);
+ if (offset_ph == -1)
+ goto out;
+ print_ports(skb, nexthdr, offset_ph);
goto out;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 12:17:26 +0100