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SUNRPC: Display compressed (shorthand) IPv6 presentation addresses

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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: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever 2009-12-03 15:58:56 -05:00 committed by Trond Myklebust
parent a01878aac5
commit dd1fd90fe6
1 changed files with 1 additions and 9 deletions
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10
net/sunrpc/addr.c
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@ -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,