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Make rpc.lockd bind to a reserved port, since there are NFS clients

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which ignore NLM requests not coming from a reserved port.

PR:		56500
Submitted by:	Jonathan Lennox <lennox@cs.columbia.edu>
MFC after:	1 week
This commit is contained in:
Peter Pentchev 2004-03-04 15:52:28 +00:00
parent 662713f2a8
commit c0f7cd1a2a
1 changed files with 18 additions and 0 deletions
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18
usr.sbin/rpc.lockd/lock_proc.c
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@ -197,6 +197,8 @@ get_client(host_addr, vers)
const char *netid;
struct netconfig *nconf;
char host[NI_MAXHOST];
uid_t old_euid;
int clnt_fd;
gettimeofday(&time_now, NULL);
@ -271,6 +273,22 @@ get_client(host_addr, vers)
return NULL;
}
/* Get the FD of the client, for bindresvport. */
clnt_control(client, CLGET_FD, &clnt_fd);
/* Regain root privileges, for bindresvport. */
old_euid = geteuid();
seteuid(0);
/*
* Bind the client FD to a reserved port.
* Some NFS servers reject any NLM request from a non-reserved port.
*/
bindresvport(clnt_fd, NULL);
/* Drop root privileges again. */
seteuid(old_euid);
/* Success - update the cache entry */
clnt_cache_ptr[clnt_cache_next_to_use] = client;
memcpy(&clnt_cache_addr[clnt_cache_next_to_use], host_addr,