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-rw-r--r--net/ipv4/netfilter/ip_tables.c46
-rw-r--r--net/ipv4/netfilter/ipt_addrtype.c18
-rw-r--r--net/ipv4/netfilter/ipt_ah.c14
-rw-r--r--net/ipv4/netfilter/ipt_ecn.c9
-rw-r--r--net/ipv4/netfilter/ipt_ttl.c7
5 files changed, 36 insertions, 58 deletions
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index b4c74a7a807..99fdb59454f 100644
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -186,16 +186,14 @@ ipt_error(struct sk_buff *skb,
/* Performance critical - called for every packet */
static inline bool
-do_match(struct ipt_entry_match *m,
- const struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- int offset,
- bool *hotdrop)
+do_match(struct ipt_entry_match *m, const struct sk_buff *skb,
+ struct xt_match_param *par)
{
+ par->match = m->u.kernel.match;
+ par->matchinfo = m->data;
+
/* Stop iteration if it doesn't match */
- if (!m->u.kernel.match->match(skb, in, out, m->u.kernel.match, m->data,
- offset, ip_hdrlen(skb), hotdrop))
+ if (!m->u.kernel.match->match(skb, par))
return true;
else
return false;
@@ -326,7 +324,6 @@ ipt_do_table(struct sk_buff *skb,
struct xt_table *table)
{
static const char nulldevname[IFNAMSIZ] __attribute__((aligned(sizeof(long))));
- u_int16_t offset;
const struct iphdr *ip;
u_int16_t datalen;
bool hotdrop = false;
@@ -336,6 +333,7 @@ ipt_do_table(struct sk_buff *skb,
void *table_base;
struct ipt_entry *e, *back;
struct xt_table_info *private;
+ struct xt_match_param mtpar;
/* Initialization */
ip = ip_hdr(skb);
@@ -348,7 +346,11 @@ ipt_do_table(struct sk_buff *skb,
* 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. */
- offset = ntohs(ip->frag_off) & IP_OFFSET;
+ mtpar.fragoff = ntohs(ip->frag_off) & IP_OFFSET;
+ mtpar.thoff = ip_hdrlen(skb);
+ mtpar.hotdrop = &hotdrop;
+ mtpar.in = in;
+ mtpar.out = out;
read_lock_bh(&table->lock);
IP_NF_ASSERT(table->valid_hooks & (1 << hook));
@@ -362,12 +364,11 @@ ipt_do_table(struct sk_buff *skb,
do {
IP_NF_ASSERT(e);
IP_NF_ASSERT(back);
- if (ip_packet_match(ip, indev, outdev, &e->ip, offset)) {
+ if (ip_packet_match(ip, indev, outdev,
+ &e->ip, mtpar.fragoff)) {
struct ipt_entry_target *t;
- if (IPT_MATCH_ITERATE(e, do_match,
- skb, in, out,
- offset, &hotdrop) != 0)
+ if (IPT_MATCH_ITERATE(e, do_match, skb, &mtpar) != 0)
goto no_match;
ADD_COUNTER(e->counters, ntohs(ip->tot_len), 1);
@@ -2116,30 +2117,23 @@ icmp_type_code_match(u_int8_t test_type, u_int8_t min_code, u_int8_t max_code,
}
static bool
-icmp_match(const struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- const struct xt_match *match,
- const void *matchinfo,
- int offset,
- unsigned int protoff,
- bool *hotdrop)
+icmp_match(const struct sk_buff *skb, const struct xt_match_param *par)
{
const struct icmphdr *ic;
struct icmphdr _icmph;
- const struct ipt_icmp *icmpinfo = matchinfo;
+ const struct ipt_icmp *icmpinfo = par->matchinfo;
/* Must not be a fragment. */
- if (offset)
+ if (par->fragoff != 0)
return false;
- ic = skb_header_pointer(skb, protoff, sizeof(_icmph), &_icmph);
+ ic = skb_header_pointer(skb, par->thoff, sizeof(_icmph), &_icmph);
if (ic == NULL) {
/* 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 = true;
+ *par->hotdrop = true;
return false;
}
diff --git a/net/ipv4/netfilter/ipt_addrtype.c b/net/ipv4/netfilter/ipt_addrtype.c
index 2c9d88a6c83..e60995e4c20 100644
--- a/net/ipv4/netfilter/ipt_addrtype.c
+++ b/net/ipv4/netfilter/ipt_addrtype.c
@@ -30,12 +30,9 @@ static inline bool match_type(const struct net_device *dev, __be32 addr,
}
static bool
-addrtype_mt_v0(const struct sk_buff *skb, const struct net_device *in,
- const struct net_device *out, const struct xt_match *match,
- const void *matchinfo, int offset, unsigned int protoff,
- bool *hotdrop)
+addrtype_mt_v0(const struct sk_buff *skb, const struct xt_match_param *par)
{
- const struct ipt_addrtype_info *info = matchinfo;
+ const struct ipt_addrtype_info *info = par->matchinfo;
const struct iphdr *iph = ip_hdr(skb);
bool ret = true;
@@ -50,20 +47,17 @@ addrtype_mt_v0(const struct sk_buff *skb, const struct net_device *in,
}
static bool
-addrtype_mt_v1(const struct sk_buff *skb, const struct net_device *in,
- const struct net_device *out, const struct xt_match *match,
- const void *matchinfo, int offset, unsigned int protoff,
- bool *hotdrop)
+addrtype_mt_v1(const struct sk_buff *skb, const struct xt_match_param *par)
{
- const struct ipt_addrtype_info_v1 *info = matchinfo;
+ const struct ipt_addrtype_info_v1 *info = par->matchinfo;
const struct iphdr *iph = ip_hdr(skb);
const struct net_device *dev = NULL;
bool ret = true;
if (info->flags & IPT_ADDRTYPE_LIMIT_IFACE_IN)
- dev = in;
+ dev = par->in;
else if (info->flags & IPT_ADDRTYPE_LIMIT_IFACE_OUT)
- dev = out;
+ dev = par->out;
if (info->source)
ret &= match_type(dev, iph->saddr, info->source) ^
diff --git a/net/ipv4/netfilter/ipt_ah.c b/net/ipv4/netfilter/ipt_ah.c
index e2e993edd66..2fce19ef4f3 100644
--- a/net/ipv4/netfilter/ipt_ah.c
+++ b/net/ipv4/netfilter/ipt_ah.c
@@ -36,27 +36,23 @@ spi_match(u_int32_t min, u_int32_t max, u_int32_t spi, bool invert)
return r;
}
-static bool
-ah_mt(const struct sk_buff *skb, const struct net_device *in,
- const struct net_device *out, const struct xt_match *match,
- const void *matchinfo, int offset, unsigned int protoff, bool *hotdrop)
+static bool ah_mt(const struct sk_buff *skb, const struct xt_match_param *par)
{
struct ip_auth_hdr _ahdr;
const struct ip_auth_hdr *ah;
- const struct ipt_ah *ahinfo = matchinfo;
+ const struct ipt_ah *ahinfo = par->matchinfo;
/* Must not be a fragment. */
- if (offset)
+ if (par->fragoff != 0)
return false;
- ah = skb_header_pointer(skb, protoff,
- sizeof(_ahdr), &_ahdr);
+ ah = skb_header_pointer(skb, par->thoff, sizeof(_ahdr), &_ahdr);
if (ah == NULL) {
/* We've been asked to examine this packet, and we
* can't. Hence, no choice but to drop.
*/
duprintf("Dropping evil AH tinygram.\n");
- *hotdrop = true;
+ *par->hotdrop = true;
return 0;
}
diff --git a/net/ipv4/netfilter/ipt_ecn.c b/net/ipv4/netfilter/ipt_ecn.c
index 2c45b4be7c3..06915463150 100644
--- a/net/ipv4/netfilter/ipt_ecn.c
+++ b/net/ipv4/netfilter/ipt_ecn.c
@@ -67,12 +67,9 @@ static inline bool match_tcp(const struct sk_buff *skb,
return true;
}
-static bool
-ecn_mt(const struct sk_buff *skb, const struct net_device *in,
- const struct net_device *out, const struct xt_match *match,
- const void *matchinfo, int offset, unsigned int protoff, bool *hotdrop)
+static bool ecn_mt(const struct sk_buff *skb, const struct xt_match_param *par)
{
- const struct ipt_ecn_info *info = matchinfo;
+ const struct ipt_ecn_info *info = par->matchinfo;
if (info->operation & IPT_ECN_OP_MATCH_IP)
if (!match_ip(skb, info))
@@ -81,7 +78,7 @@ ecn_mt(const struct sk_buff *skb, const struct net_device *in,
if (info->operation & (IPT_ECN_OP_MATCH_ECE|IPT_ECN_OP_MATCH_CWR)) {
if (ip_hdr(skb)->protocol != IPPROTO_TCP)
return false;
- if (!match_tcp(skb, info, hotdrop))
+ if (!match_tcp(skb, info, par->hotdrop))
return false;
}
diff --git a/net/ipv4/netfilter/ipt_ttl.c b/net/ipv4/netfilter/ipt_ttl.c
index d4c3fdc2a79..297f1cbf4ff 100644
--- a/net/ipv4/netfilter/ipt_ttl.c
+++ b/net/ipv4/netfilter/ipt_ttl.c
@@ -18,12 +18,9 @@ MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
MODULE_DESCRIPTION("Xtables: IPv4 TTL field match");
MODULE_LICENSE("GPL");
-static bool
-ttl_mt(const struct sk_buff *skb, const struct net_device *in,
- const struct net_device *out, const struct xt_match *match,
- const void *matchinfo, int offset, unsigned int protoff, bool *hotdrop)
+static bool ttl_mt(const struct sk_buff *skb, const struct xt_match_param *par)
{
- const struct ipt_ttl_info *info = matchinfo;
+ const struct ipt_ttl_info *info = par->matchinfo;
const u8 ttl = ip_hdr(skb)->ttl;
switch (info->mode) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-24 04:18:03 +0000