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/*
Copyright (C) 1995, 1996 Free Software Foundation, Inc.
Written by Michael I. Bushnell, p/BSG.
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
The GNU Hurd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include "nfs.h"
#include <rpcsvc/mount.h>
#include <rpc/pmap_prot.h>
#include <errno.h>
#include <sys/socket.h>
#include <netdb.h>
#include <string.h>
#include <netinet/in.h>
#include <stdio.h>
/* Service name for portmapper */
char *pmap_service_name = "sunrpc";
/* Fallback port number for portmapper */
short pmap_service_number = PMAPPORT;
/* RPC program for mount server. */
int mount_program = MOUNTPROG;
/* RPC version for mount server. */
int mount_version = MOUNTVERS;
/* Fallback port number for mount server. */
short mount_port = 0;
/* True iff MOUNT_PORT should be used even if portmapper present. */
int mount_port_override = 0;
/* RPC program number for NFS server. */
int nfs_program = NFS_PROGRAM;
/* RPC version number for NFS server. */
int nfs_version = NFS_VERSION;
/* Fallback port number for NFS server. */
short nfs_port = NFS_PORT;
/* True iff NFS_PORT should be used even if portmapper present. */
int nfs_port_override = 0;
int protocol_version = 2;
/* Set up an RPC for procedure PROCNUM for talking to the portmapper.
Allocate storage with malloc and point *BUF at it; caller must free
this when done. Return the address where the args for the
procedure should be placed. */
int *
pmap_initialize_rpc (int procnum, void **buf)
{
return initialize_rpc (PMAPPROG, PMAPVERS, procnum, 0, buf, 0, 0, -1);
}
/* Set up an RPC for procedure PROCNUM for talking to the mount
server. Allocate storage with malloc and point *BUF at it; caller
must free this when done. Return the address where the args for
the procedure should be placed. */
int *
mount_initialize_rpc (int procnum, void **buf)
{
return initialize_rpc (MOUNTPROG, MOUNTVERS, procnum, 0, buf, 0, 0, -1);
}
/* Using the mount protocol, lookup NAME at host HOST.
Return a node for it or null for an error. */
struct node *
mount_root (char *name, char *host)
{
struct sockaddr_in addr;
struct hostent *h;
struct servent *s;
int *p;
void *rpcbuf;
int port;
struct node *np;
short pmapport;
/* Lookup the portmapper port number */
if (pmap_service_name)
{
s = getservbyname ("sunrpc", pmap_service_name);
if (s)
pmapport = s->s_port;
else
pmapport = htons (pmap_service_number);
}
else
pmapport = htons (pmap_service_number);
/* Lookup the host */
h = gethostbyname (host);
if (!h)
{
herror (host);
return 0;
}
addr.sin_family = h->h_addrtype;
bcopy (h->h_addr_list[0], &addr.sin_addr, h->h_length);
addr.sin_port = pmapport;
connect (main_udp_socket,
(struct sockaddr *)&addr, sizeof (struct sockaddr_in));
if (!mount_port_override)
{
/* Formulate and send a PMAPPROC_GETPORT request
to lookup the mount program on the server. */
p = pmap_initialize_rpc (PMAPPROC_GETPORT, &rpcbuf);
*p++ = htonl (MOUNTPROG);
*p++ = htonl (MOUNTVERS);
*p++ = htonl (IPPROTO_UDP);
*p++ = htonl (0);
errno = conduct_rpc (&rpcbuf, &p);
if (!errno)
{
port = ntohl (*p++);
addr.sin_port = htons (port);
}
else if (mount_port)
addr.sin_port = htons (mount_port);
else
{
free (rpcbuf);
perror ("portmap of mount");
return 0;
}
free (rpcbuf);
}
else
addr.sin_port = htons (mount_port);
/* Now talking to the mount program, fetch the file handle
for the root. */
connect (main_udp_socket,
(struct sockaddr *) &addr, sizeof (struct sockaddr_in));
p = mount_initialize_rpc (MOUNTPROC_MNT, &rpcbuf);
p = xdr_encode_string (p, name);
errno = conduct_rpc (&rpcbuf, &p);
if (errno)
{
free (rpcbuf);
perror (name);
return 0;
}
/* XXX Protocol spec says this should be a "unix error code"; we'll
pretend that an NFS error code is what's meant, the numbers match
anyhow. */
errno = nfs_error_trans (htonl (*p++));
if (errno)
{
free (rpcbuf);
perror (name);
return 0;
}
/* Create the node for root */
lookup_fhandle (p, &np);
free (rpcbuf);
mutex_unlock (&np->lock);
if (!nfs_port_override)
{
/* Now send another PMAPPROC_GETPORT request to lookup the nfs server. */
addr.sin_port = pmapport;
connect (main_udp_socket,
(struct sockaddr *) &addr, sizeof (struct sockaddr_in));
p = pmap_initialize_rpc (PMAPPROC_GETPORT, &rpcbuf);
*p++ = htonl (NFS_PROGRAM);
*p++ = htonl (NFS_VERSION);
*p++ = htonl (IPPROTO_UDP);
*p++ = htonl (0);
errno = conduct_rpc (&rpcbuf, &p);
if (!errno)
port = ntohl (*p++);
else if (nfs_port)
port = nfs_port;
else
{
free (rpcbuf);
perror ("pmap of nfs server");
return 0;
}
free (rpcbuf);
}
else
port = nfs_port;
addr.sin_port = htons (port);
connect (main_udp_socket,
(struct sockaddr *) &addr, sizeof (struct sockaddr_in));
return np;
}
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