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[IPV6]: Add v4mapped address inline 

Add v4mapped address inline to avoid calls to ipv6_addr_type().

Signed-off-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Brian Haley 2007-08-24 23:16:08 -07:00 committed by David S. Miller
parent 6f4fc423b9
commit e773e4faa1
5 changed files with 12 additions and 6 deletions
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6
include/net/ipv6.h
View File

@ -377,6 +377,12 @@ static inline int ipv6_addr_any(const struct in6_addr *a)
a->s6_addr32[2] | a->s6_addr32[3] ) == 0);
}
static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
{
return ((a->s6_addr32[0] | a->s6_addr32[1]) == 0 &&
a->s6_addr32[2] == htonl(0x0000ffff));
}
/*
* find the first different bit between two addresses
* length of address must be a multiple of 32bits

2
net/ipv6/ipv6_sockglue.c
View File

@ -249,7 +249,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
}
if (ipv6_only_sock(sk) ||
!(ipv6_addr_type(&np->daddr) & IPV6_ADDR_MAPPED)) {
!ipv6_addr_v4mapped(&np->daddr)) {
retv = -EADDRNOTAVAIL;
break;
}

4
net/ipv6/tcp_ipv6.c
View File

@ -697,7 +697,7 @@ static int tcp_v6_parse_md5_keys (struct sock *sk, char __user *optval,
if (!cmd.tcpm_keylen) {
if (!tcp_sk(sk)->md5sig_info)
return -ENOENT;
if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_MAPPED)
if (ipv6_addr_v4mapped(&sin6->sin6_addr))
return tcp_v4_md5_do_del(sk, sin6->sin6_addr.s6_addr32[3]);
return tcp_v6_md5_do_del(sk, &sin6->sin6_addr);
}
@ -720,7 +720,7 @@ static int tcp_v6_parse_md5_keys (struct sock *sk, char __user *optval,
newkey = kmemdup(cmd.tcpm_key, cmd.tcpm_keylen, GFP_KERNEL);
if (!newkey)
return -ENOMEM;
if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_MAPPED) {
if (ipv6_addr_v4mapped(&sin6->sin6_addr)) {
return tcp_v4_md5_do_add(sk, sin6->sin6_addr.s6_addr32[3],
newkey, cmd.tcpm_keylen);
}

2
net/ipv6/udp.c
View File

@ -612,7 +612,7 @@ int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk,
daddr = NULL;
if (daddr) {
if (ipv6_addr_type(daddr) == IPV6_ADDR_MAPPED) {
if (ipv6_addr_v4mapped(daddr)) {
struct sockaddr_in sin;
sin.sin_family = AF_INET;
sin.sin_port = sin6 ? sin6->sin6_port : inet->dport;

4
net/sctp/ipv6.c
View File

@ -493,7 +493,7 @@ static int sctp_v6_cmp_addr(const union sctp_addr *addr1,
if (addr1->sa.sa_family != addr2->sa.sa_family) {
if (addr1->sa.sa_family == AF_INET &&
addr2->sa.sa_family == AF_INET6 &&
IPV6_ADDR_MAPPED == ipv6_addr_type(&addr2->v6.sin6_addr)) {
ipv6_addr_v4mapped(&addr2->v6.sin6_addr)) {
if (addr2->v6.sin6_port == addr1->v4.sin_port &&
addr2->v6.sin6_addr.s6_addr32[3] ==
addr1->v4.sin_addr.s_addr)
@ -501,7 +501,7 @@ static int sctp_v6_cmp_addr(const union sctp_addr *addr1,
}
if (addr2->sa.sa_family == AF_INET &&
addr1->sa.sa_family == AF_INET6 &&
IPV6_ADDR_MAPPED == ipv6_addr_type(&addr1->v6.sin6_addr)) {
ipv6_addr_v4mapped(&addr1->v6.sin6_addr)) {
if (addr1->v6.sin6_port == addr2->v4.sin_port &&
addr1->v6.sin6_addr.s6_addr32[3] ==
addr2->v4.sin_addr.s_addr)