[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>

diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 9059e0ed7fe375e70d12740a1703526d89aba944..9573c8d1915370d04df50ead4345cd128eaf1f73 100644 (file)
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -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

diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 6b038aa72e88b51fe77554bc4cab65af072ef2e8..74254fccbcc837f477d6cfac458367c5f6bfd062 100644 (file)
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -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;
                        }

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 3e06799b37a65248047f050072b6208dacdca336..a07b59c528f331181a1c34a873d8e754e4e9c1d1 100644 (file)
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -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);
        }

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index c347f3e30e2e5ef1ccd3469f6f2ab804649402c4..82ff26dd4470e894c46099f8db7f84eb8e9301d7 100644 (file)
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -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;

diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index 670fd2740b890bb6f2aeef51ddc7b05c07e4e9d0..ec29b97dbab96514a9e1faa5d80c727ac35311a9 100644 (file)
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -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)