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Commit dd1fd90f authored by Chuck Lever's avatar Chuck Lever Committed by Trond Myklebust
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SUNRPC: Display compressed (shorthand) IPv6 presentation addresses 



Recent changes to snprintf() introduced the %pI6c formatter, which can
display an IPv6 address with standard shorthanding.  Using a
shorthanded address can save us a few bytes of memory for each stored
presentation address, or a few bytes on the wire when sending these in
a universal address.

Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent a01878aa

net/sunrpc/addr.c

+1 −9
Original line number Diff line number Diff line
@@ -55,16 +55,8 @@ static size_t rpc_ntop6_noscopeid(const struct sockaddr *sap, 


	/*

	 * RFC 4291, Section 2.2.1

	 *

	 * To keep the result as short as possible, especially

	 * since we don't shorthand, we don't want leading zeros

	 * in each halfword, so avoid %pI6.

	 */

	return snprintf(buf, buflen, "%x:%x:%x:%x:%x:%x:%x:%x",

		ntohs(addr->s6_addr16[0]), ntohs(addr->s6_addr16[1]),

		ntohs(addr->s6_addr16[2]), ntohs(addr->s6_addr16[3]),

		ntohs(addr->s6_addr16[4]), ntohs(addr->s6_addr16[5]),

		ntohs(addr->s6_addr16[6]), ntohs(addr->s6_addr16[7]));

	return snprintf(buf, buflen, "%pI6c", addr);

}



static size_t rpc_ntop6(const struct sockaddr *sap,