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[PATCH] knfsd: SUNRPC: add a "generic" function to see if the peer uses a secure port 

The only reason svcsock.c looks at a sockaddr's port is to check whether the
remote peer is connecting from a privileged port.  Refactor this check to hide
processing that is specific to address format.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Chuck Lever 2007-02-12 00:53:37 -08:00 committed by Linus Torvalds
parent b92503b25c
commit bcdb81ae29
1 changed files with 18 additions and 3 deletions
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21
net/sunrpc/svcsock.c
View File

@ -938,6 +938,22 @@ svc_tcp_data_ready(struct sock *sk, int count)
wake_up_interruptible(sk->sk_sleep);
}
static inline int svc_port_is_privileged(struct sockaddr *sin)
{
switch (sin->sa_family) {
case AF_INET:
return ntohs(((struct sockaddr_in *)sin)->sin_port)
< PROT_SOCK;
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
case AF_INET6:
return ntohs(((struct sockaddr_in6 *)sin)->sin6_port)
< PROT_SOCK;
#endif
default:
return 0;
}
}
/*
* Accept a TCP connection
*/
@ -984,7 +1000,7 @@ svc_tcp_accept(struct svc_sock *svsk)
* hosts here, but when we get encryption, the IP of the host won't
* tell us anything. For now just warn about unpriv connections.
*/
if (ntohs(sin.sin_port) >= 1024) {
if (!svc_port_is_privileged((struct sockaddr *) &sin)) {
dprintk(KERN_WARNING
"%s: connect from unprivileged port: %s\n",
serv->sv_name,
@ -1334,7 +1350,6 @@ int
svc_recv(struct svc_rqst *rqstp, long timeout)
{
struct svc_sock *svsk = NULL;
struct sockaddr_in *sin = svc_addr_in(rqstp);
struct svc_serv *serv = rqstp->rq_server;
struct svc_pool *pool = rqstp->rq_pool;
int len, i;
@ -1431,7 +1446,7 @@ svc_recv(struct svc_rqst *rqstp, long timeout)
svsk->sk_lastrecv = get_seconds();
clear_bit(SK_OLD, &svsk->sk_flags);
rqstp->rq_secure = ntohs(sin->sin_port) < PROT_SOCK;
rqstp->rq_secure = svc_port_is_privileged(svc_addr(rqstp));
rqstp->rq_chandle.defer = svc_defer;
if (serv->sv_stats)