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SUNRPC: Use rpc_pton() in ip_map_parse()

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The existing logic in ip_map_parse() can not currently parse
shorthanded IPv6 addresses (anything with a double colon), nor can
it parse an IPv6 presentation address with a scope ID.  An
IPv6-enabled mountd can pass down both.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Chuck Lever 2010-01-26 14:03:47 -05:00 committed by J. Bruce Fields
parent 73834d6f90
commit 07396051a5
1 changed files with 26 additions and 21 deletions
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47
net/sunrpc/svcauth_unix.c
View file

@ -15,6 +15,7 @@
#include <linux/kernel.h>
#define RPCDBG_FACILITY RPCDBG_AUTH
#include <linux/sunrpc/clnt.h>
/*
* AUTHUNIX and AUTHNULL credentials are both handled here.
@ -187,10 +188,13 @@ static int ip_map_parse(struct cache_detail *cd,
* for scratch: */
char *buf = mesg;
int len;
int b1, b2, b3, b4, b5, b6, b7, b8;
char c;
char class[8];
struct in6_addr addr;
union {
struct sockaddr sa;
struct sockaddr_in s4;
struct sockaddr_in6 s6;
} address;
struct sockaddr_in6 sin6;
int err;
struct ip_map *ipmp;
@ -209,24 +213,24 @@ static int ip_map_parse(struct cache_detail *cd,
len = qword_get(&mesg, buf, mlen);
if (len <= 0) return -EINVAL;
if (sscanf(buf, "%u.%u.%u.%u%c", &b1, &b2, &b3, &b4, &c) == 4) {
addr.s6_addr32[0] = 0;
addr.s6_addr32[1] = 0;
addr.s6_addr32[2] = htonl(0xffff);
addr.s6_addr32[3] =
htonl((((((b1<<8)|b2)<<8)|b3)<<8)|b4);
} else if (sscanf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x%c",
&b1, &b2, &b3, &b4, &b5, &b6, &b7, &b8, &c) == 8) {
addr.s6_addr16[0] = htons(b1);
addr.s6_addr16[1] = htons(b2);
addr.s6_addr16[2] = htons(b3);
addr.s6_addr16[3] = htons(b4);
addr.s6_addr16[4] = htons(b5);
addr.s6_addr16[5] = htons(b6);
addr.s6_addr16[6] = htons(b7);
addr.s6_addr16[7] = htons(b8);
} else
if (rpc_pton(buf, len, &address.sa, sizeof(address)) == 0)
return -EINVAL;
switch (address.sa.sa_family) {
case AF_INET:
/* Form a mapped IPv4 address in sin6 */
memset(&sin6, 0, sizeof(sin6));
sin6.sin6_family = AF_INET6;
sin6.sin6_addr.s6_addr32[2] = htonl(0xffff);
sin6.sin6_addr.s6_addr32[3] = address.s4.sin_addr.s_addr;
break;
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
case AF_INET6:
memcpy(&sin6, &address.s6, sizeof(sin6));
break;
#endif
default:
return -EINVAL;
}
expiry = get_expiry(&mesg);
if (expiry ==0)
@ -243,7 +247,8 @@ static int ip_map_parse(struct cache_detail *cd,
} else
dom = NULL;
ipmp = ip_map_lookup(class, &addr);
/* IPv6 scope IDs are ignored for now */
ipmp = ip_map_lookup(class, &sin6.sin6_addr);
if (ipmp) {
err = ip_map_update(ipmp,
container_of(dom, struct unix_domain, h),