[IPv4] RAW: Compact the API for the kernel
The raw sockets functions are explicitly used from
inside the kernel in two places:
1. in ip_local_deliver_finish to intercept skb-s
2. in icmp_error
For this purposes many functions and even data structures,
that are naturally internal for raw protocol, are exported.
Compact the API to two functions and hide all the other
(including hash table and rwlock) inside the net/ipv4/raw.c
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 4068e17..6563139 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -204,22 +204,14 @@
rcu_read_lock();
{
- /* Note: See raw.c and net/raw.h, RAWV4_HTABLE_SIZE==MAX_INET_PROTOS */
int protocol = ip_hdr(skb)->protocol;
- int hash;
- struct sock *raw_sk;
+ int hash, raw;
struct net_protocol *ipprot;
resubmit:
+ raw = raw_local_deliver(skb, protocol);
+
hash = protocol & (MAX_INET_PROTOS - 1);
- raw_sk = sk_head(&raw_v4_htable[hash]);
-
- /* If there maybe a raw socket we must check - if not we
- * don't care less
- */
- if (raw_sk && !raw_v4_input(skb, ip_hdr(skb), hash))
- raw_sk = NULL;
-
if ((ipprot = rcu_dereference(inet_protos[hash])) != NULL) {
int ret;
@@ -237,7 +229,7 @@
}
IP_INC_STATS_BH(IPSTATS_MIB_INDELIVERS);
} else {
- if (!raw_sk) {
+ if (!raw) {
if (xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) {
IP_INC_STATS_BH(IPSTATS_MIB_INUNKNOWNPROTOS);
icmp_send(skb, ICMP_DEST_UNREACH,