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-rw-r--r--include/net/ipv6.h6
-rw-r--r--net/ipv6/ipv6_sockglue.c2
-rw-r--r--net/ipv6/tcp_ipv6.c4
-rw-r--r--net/ipv6/udp.c2
-rw-r--r--net/sctp/ipv6.c4
5 files changed, 12 insertions, 6 deletions
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 9059e0ed7fe..9573c8d1915 100644
--- 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 6b038aa72e8..74254fccbcc 100644
--- 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 3e06799b37a..a07b59c528f 100644
--- 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 c347f3e30e2..82ff26dd447 100644
--- 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 670fd2740b8..ec29b97dbab 100644
--- 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)