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Commit a470143f authored by Sagi Grimberg's avatar Sagi Grimberg Committed by Jens Axboe
Browse files

net/utils: Introduce inet_addr_is_any 



Can be useful to check INET_ANY address for both ipv4/ipv6 addresses.

Reviewed-by: default avatarBart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: default avatarSagi Grimberg <sagi@grimberg.me>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 57678e5a

include/linux/inet.h

+1 −0
Original line number Diff line number Diff line
@@ -59,5 +59,6 @@ extern int in6_pton(const char *src, int srclen, u8 *dst, int delim, const char 


extern int inet_pton_with_scope(struct net *net, unsigned short af,

		const char *src, const char *port, struct sockaddr_storage *addr);

extern bool inet_addr_is_any(struct sockaddr *addr);



#endif	/* _LINUX_INET_H */

net/core/utils.c

+23 −0
Original line number Diff line number Diff line
@@ -403,6 +403,29 @@ int inet_pton_with_scope(struct net *net, __kernel_sa_family_t af, 
}

EXPORT_SYMBOL(inet_pton_with_scope);



bool inet_addr_is_any(struct sockaddr *addr)

{

	if (addr->sa_family == AF_INET6) {

		struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)addr;

		const struct sockaddr_in6 in6_any =

			{ .sin6_addr = IN6ADDR_ANY_INIT };



		if (!memcmp(in6->sin6_addr.s6_addr,

			    in6_any.sin6_addr.s6_addr, 16))

			return true;

	} else if (addr->sa_family == AF_INET) {

		struct sockaddr_in *in = (struct sockaddr_in *)addr;



		if (in->sin_addr.s_addr == htonl(INADDR_ANY))

			return true;

	} else {

		pr_warn("unexpected address family %u\n", addr->sa_family);

	}



	return false;

}

EXPORT_SYMBOL(inet_addr_is_any);



void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb,

			      __be32 from, __be32 to, bool pseudohdr)

{