clidfs.c

samba-3.0.22.tar.gz 编译smb服务器的源码

/* 
   Unix SMB/CIFS implementation.
   client connect/disconnect routines
   Copyright (C) Andrew Tridgell                  1994-1998
   Copyright (C) Gerald (Jerry) Carter            2004
      
   This program 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 of the License, or
   (at your option) any later version.
   
   This program 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"


struct client_connection {
	struct client_connection *prev, *next;
	struct cli_state *cli;
	pstring mount;
};

/* global state....globals reek! */

static pstring username;
static pstring password;
static BOOL use_kerberos;
static BOOL got_pass;
static int signing_state;
int max_protocol = PROTOCOL_NT1;

static int port;
static int name_type = 0x20;
static BOOL have_ip;
static struct in_addr dest_ip;

static struct client_connection *connections;

/********************************************************************
 Return a connection to a server.
********************************************************************/

static struct cli_state *do_connect( const char *server, const char *share,
                                     BOOL show_sessetup )
{
	struct cli_state *c;
	struct nmb_name called, calling;
	const char *server_n;
	struct in_addr ip;
	pstring servicename;
	char *sharename;
	fstring newserver, newshare;
	
	/* make a copy so we don't modify the global string 'service' */
	pstrcpy(servicename, share);
	sharename = servicename;
	if (*sharename == '\\') {
		server = sharename+2;
		sharename = strchr_m(server,'\\');
		if (!sharename) return NULL;
		*sharename = 0;
		sharename++;
	}

	server_n = server;
	
	zero_ip(&ip);

	make_nmb_name(&calling, global_myname(), 0x0);
	make_nmb_name(&called , server, name_type);

 again:
	zero_ip(&ip);
	if (have_ip) 
		ip = dest_ip;

	/* have to open a new connection */
	if (!(c=cli_initialise(NULL)) || (cli_set_port(c, port) != port) ||
	    !cli_connect(c, server_n, &ip)) {
		d_printf("Connection to %s failed\n", server_n);
		return NULL;
	}

	c->protocol = max_protocol;
	c->use_kerberos = use_kerberos;
	cli_setup_signing_state(c, signing_state);
		

	if (!cli_session_request(c, &calling, &called)) {
		char *p;
		d_printf("session request to %s failed (%s)\n", 
			 called.name, cli_errstr(c));
		cli_shutdown(c);
		if ((p=strchr_m(called.name, '.'))) {
			*p = 0;
			goto again;
		}
		if (strcmp(called.name, "*SMBSERVER")) {
			make_nmb_name(&called , "*SMBSERVER", 0x20);
			goto again;
		}
		return NULL;
	}

	DEBUG(4,(" session request ok\n"));

	if (!cli_negprot(c)) {
		d_printf("protocol negotiation failed\n");
		cli_shutdown(c);
		return NULL;
	}

	if (!got_pass) {
		char *pass = getpass("Password: ");
		if (pass) {
			pstrcpy(password, pass);
			got_pass = 1;
		}
	}

	if (!cli_session_setup(c, username, 
			       password, strlen(password),
			       password, strlen(password),
			       lp_workgroup())) {
		/* if a password was not supplied then try again with a null username */
		if (password[0] || !username[0] || use_kerberos ||
		    !cli_session_setup(c, "", "", 0, "", 0, lp_workgroup())) { 
			d_printf("session setup failed: %s\n", cli_errstr(c));
			if (NT_STATUS_V(cli_nt_error(c)) == 
			    NT_STATUS_V(NT_STATUS_MORE_PROCESSING_REQUIRED))
				d_printf("did you forget to run kinit?\n");
			cli_shutdown(c);
			return NULL;
		}
		d_printf("Anonymous login successful\n");
	}

	if ( show_sessetup ) {
		if (*c->server_domain) {
			DEBUG(0,("Domain=[%s] OS=[%s] Server=[%s]\n",
				c->server_domain,c->server_os,c->server_type));
		} else if (*c->server_os || *c->server_type){
			DEBUG(0,("OS=[%s] Server=[%s]\n",
				 c->server_os,c->server_type));
		}		
	}
	DEBUG(4,(" session setup ok\n"));

	/* here's the fun part....to support 'msdfs proxy' shares
	   (on Samba or windows) we have to issues a TRANS_GET_DFS_REFERRAL 
	   here before trying to connect to the original share.
	   check_dfs_proxy() will fail if it is a normal share. */

	if ( (c->capabilities & CAP_DFS) && cli_check_msdfs_proxy( c, sharename, newserver, newshare ) ) {
		cli_shutdown(c);
		return do_connect( newserver, newshare, False );
	}

	/* must be a normal share */

	if (!cli_send_tconX(c, sharename, "?????", password, strlen(password)+1)) {
		d_printf("tree connect failed: %s\n", cli_errstr(c));
		cli_shutdown(c);
		return NULL;
	}

	DEBUG(4,(" tconx ok\n"));

	return c;
}

/****************************************************************************
****************************************************************************/

static void cli_cm_set_mntpoint( struct cli_state *c, const char *mnt )
{
	struct client_connection *p;
	int i;

	for ( p=connections,i=0; p; p=p->next,i++ ) {
		if ( strequal(p->cli->desthost, c->desthost) && strequal(p->cli->share, c->share) )
			break;
	}
	
	if ( p ) {
		pstrcpy( p->mount, mnt );
		dos_clean_name( p->mount );
	}
}

/****************************************************************************
****************************************************************************/

const char * cli_cm_get_mntpoint( struct cli_state *c )
{
	struct client_connection *p;
	int i;

	for ( p=connections,i=0; p; p=p->next,i++ ) {
		if ( strequal(p->cli->desthost, c->desthost) && strequal(p->cli->share, c->share) )
			break;
	}
	
	if ( p )
		return p->mount;
		
	return NULL;
}

/********************************************************************
 Add a new connection to the list
********************************************************************/

static struct cli_state* cli_cm_connect( const char *server, const char *share,
                                         BOOL show_hdr )
{
	struct client_connection *node;
	
	node = SMB_XMALLOC_P( struct client_connection );
	
	node->cli = do_connect( server, share, show_hdr );

	if ( !node->cli ) {
		SAFE_FREE( node );
		return NULL;
	}

	DLIST_ADD( connections, node );

	cli_cm_set_mntpoint( node->cli, "" );

	return node->cli;

}

/********************************************************************
 Return a connection to a server.
********************************************************************/

static struct cli_state* cli_cm_find( const char *server, const char *share )
{
	struct client_connection *p;

	for ( p=connections; p; p=p->next ) {
		if ( strequal(server, p->cli->desthost) && strequal(share,p->cli->share) )
			return p->cli;
	}

	return NULL;
}

/****************************************************************************
 open a client connection to a \\server\share.  Set's the current *cli 
 global variable as a side-effect (but only if the connection is successful).
****************************************************************************/

struct cli_state* cli_cm_open( const char *server, const char *share, BOOL show_hdr )
{
	struct cli_state *c;
	
	/* try to reuse an existing connection */

	c = cli_cm_find( server, share );
	
	if ( !c )
		c = cli_cm_connect( server, share, show_hdr );

	return c;
}

/****************************************************************************
****************************************************************************/

void cli_cm_shutdown( void )
{

	struct client_connection *p, *x;

	for ( p=connections; p; ) {
		cli_shutdown( p->cli );
		x = p;
		p = p->next;

		SAFE_FREE( x );
	}

	connections = NULL;

	return;
}

/****************************************************************************
****************************************************************************/

void cli_cm_display(void)
{
	struct client_connection *p;
	int i;

	for ( p=connections,i=0; p; p=p->next,i++ ) {
		d_printf("%d:\tserver=%s, share=%s\n", 
			i, p->cli->desthost, p->cli->share );
	}
}

/****************************************************************************
****************************************************************************/

void cli_cm_set_credentials( struct user_auth_info *user )
{
	pstrcpy( username, user->username );
	
	if ( user->got_pass ) {
		pstrcpy( password, user->password );
		got_pass = True;
	}
	
	use_kerberos = user->use_kerberos;	
	signing_state = user->signing_state;
}

/****************************************************************************
****************************************************************************/

void cli_cm_set_port( int port_number )
{
	port = port_number;
}

/****************************************************************************
****************************************************************************/

void cli_cm_set_dest_name_type( int type )
{
	name_type = type;
}

/****************************************************************************
****************************************************************************/

void cli_cm_set_dest_ip(struct in_addr ip )
{
	dest_ip = ip;
	have_ip = True;
}

/********************************************************************
 split a dfs path into the server and share name components
********************************************************************/

static void split_dfs_path( const char *nodepath, fstring server, fstring share )
{
	char *p;