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-rw-r--r--include/net/inet_sock.h1
-rw-r--r--include/uapi/linux/in.h1
-rw-r--r--net/ipv4/af_inet.c3
-rw-r--r--net/ipv4/ip_sockglue.c7
-rw-r--r--net/ipv6/af_inet6.c3
5 files changed, 13 insertions, 2 deletions
diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h
index b6c3737da4e9..47eb67b08abd 100644
--- a/include/net/inet_sock.h
+++ b/include/net/inet_sock.h
@@ -187,6 +187,7 @@ struct inet_sock {
transparent:1,
mc_all:1,
nodefrag:1;
+ __u8 bind_address_no_port:1;
__u8 rcv_tos;
__u8 convert_csum;
int uc_index;
diff --git a/include/uapi/linux/in.h b/include/uapi/linux/in.h
index 641338bef651..83d6236a2f08 100644
--- a/include/uapi/linux/in.h
+++ b/include/uapi/linux/in.h
@@ -112,6 +112,7 @@ struct in_addr {
#define IP_MINTTL 21
#define IP_NODEFRAG 22
#define IP_CHECKSUM 23
+#define IP_BIND_ADDRESS_NO_PORT 24
/* IP_MTU_DISCOVER values */
#define IP_PMTUDISC_DONT 0 /* Never send DF frames */
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 6ad0f7a711c9..cc858ef44451 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -488,7 +488,8 @@ int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
inet->inet_saddr = 0; /* Use device */
/* Make sure we are allowed to bind here. */
- if (sk->sk_prot->get_port(sk, snum)) {
+ if ((snum || !inet->bind_address_no_port) &&
+ sk->sk_prot->get_port(sk, snum)) {
inet->inet_saddr = inet->inet_rcv_saddr = 0;
err = -EADDRINUSE;
goto out_release_sock;
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 7cfb0893f263..04ae2992a5cd 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -582,6 +582,7 @@ static int do_ip_setsockopt(struct sock *sk, int level,
case IP_TRANSPARENT:
case IP_MINTTL:
case IP_NODEFRAG:
+ case IP_BIND_ADDRESS_NO_PORT:
case IP_UNICAST_IF:
case IP_MULTICAST_TTL:
case IP_MULTICAST_ALL:
@@ -732,6 +733,9 @@ static int do_ip_setsockopt(struct sock *sk, int level,
}
inet->nodefrag = val ? 1 : 0;
break;
+ case IP_BIND_ADDRESS_NO_PORT:
+ inet->bind_address_no_port = val ? 1 : 0;
+ break;
case IP_MTU_DISCOVER:
if (val < IP_PMTUDISC_DONT || val > IP_PMTUDISC_OMIT)
goto e_inval;
@@ -1324,6 +1328,9 @@ static int do_ip_getsockopt(struct sock *sk, int level, int optname,
case IP_NODEFRAG:
val = inet->nodefrag;
break;
+ case IP_BIND_ADDRESS_NO_PORT:
+ val = inet->bind_address_no_port;
+ break;
case IP_MTU_DISCOVER:
val = inet->pmtudisc;
break;
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index f3866c0b6cfe..7de52b65173f 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -362,7 +362,8 @@ int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
np->saddr = addr->sin6_addr;
/* Make sure we are allowed to bind here. */
- if (sk->sk_prot->get_port(sk, snum)) {
+ if ((snum || !inet->bind_address_no_port) &&
+ sk->sk_prot->get_port(sk, snum)) {
inet_reset_saddr(sk);
err = -EADDRINUSE;
goto out;