mirror of
https://github.com/samba-team/samba.git
synced 2024-12-24 21:34:56 +03:00
b29915d611
Volker
(This used to be commit 94817a8ef5
)
741 lines
18 KiB
C
741 lines
18 KiB
C
/*
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Unix SMB/CIFS implementation.
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client connect/disconnect routines
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Copyright (C) Andrew Tridgell 1994-1998
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Copyright (C) Gerald (Jerry) Carter 2004
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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struct client_connection {
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struct client_connection *prev, *next;
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struct cli_state *cli;
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pstring mount;
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};
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/* global state....globals reek! */
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static pstring username;
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static pstring password;
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static BOOL use_kerberos;
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static BOOL got_pass;
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static int signing_state;
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int max_protocol = PROTOCOL_NT1;
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static int port;
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static int name_type = 0x20;
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static BOOL have_ip;
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static struct in_addr dest_ip;
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static struct client_connection *connections;
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/********************************************************************
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Return a connection to a server.
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********************************************************************/
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static struct cli_state *do_connect( const char *server, const char *share,
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BOOL show_sessetup )
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{
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struct cli_state *c = NULL;
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struct nmb_name called, calling;
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const char *server_n;
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struct in_addr ip;
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pstring servicename;
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char *sharename;
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fstring newserver, newshare;
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/* make a copy so we don't modify the global string 'service' */
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pstrcpy(servicename, share);
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sharename = servicename;
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if (*sharename == '\\') {
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server = sharename+2;
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sharename = strchr_m(server,'\\');
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if (!sharename) return NULL;
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*sharename = 0;
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sharename++;
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}
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server_n = server;
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zero_ip(&ip);
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make_nmb_name(&calling, global_myname(), 0x0);
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make_nmb_name(&called , server, name_type);
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again:
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zero_ip(&ip);
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if (have_ip)
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ip = dest_ip;
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/* have to open a new connection */
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if (!(c=cli_initialise()) || (cli_set_port(c, port) != port) ||
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!cli_connect(c, server_n, &ip)) {
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d_printf("Connection to %s failed\n", server_n);
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return NULL;
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}
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c->protocol = max_protocol;
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c->use_kerberos = use_kerberos;
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cli_setup_signing_state(c, signing_state);
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if (!cli_session_request(c, &calling, &called)) {
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char *p;
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d_printf("session request to %s failed (%s)\n",
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called.name, cli_errstr(c));
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cli_shutdown(c);
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c = NULL;
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if ((p=strchr_m(called.name, '.'))) {
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*p = 0;
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goto again;
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}
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if (strcmp(called.name, "*SMBSERVER")) {
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make_nmb_name(&called , "*SMBSERVER", 0x20);
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goto again;
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}
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return NULL;
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}
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DEBUG(4,(" session request ok\n"));
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if (!cli_negprot(c)) {
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d_printf("protocol negotiation failed\n");
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cli_shutdown(c);
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return NULL;
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}
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if (!got_pass) {
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char *pass = getpass("Password: ");
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if (pass) {
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pstrcpy(password, pass);
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got_pass = 1;
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}
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}
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if (!NT_STATUS_IS_OK(cli_session_setup(c, username,
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password, strlen(password),
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password, strlen(password),
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lp_workgroup()))) {
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/* if a password was not supplied then try again with a null username */
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if (password[0] || !username[0] || use_kerberos ||
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!NT_STATUS_IS_OK(cli_session_setup(c, "", "", 0, "", 0,
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lp_workgroup()))) {
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d_printf("session setup failed: %s\n", cli_errstr(c));
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if (NT_STATUS_V(cli_nt_error(c)) ==
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NT_STATUS_V(NT_STATUS_MORE_PROCESSING_REQUIRED))
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d_printf("did you forget to run kinit?\n");
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cli_shutdown(c);
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return NULL;
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}
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d_printf("Anonymous login successful\n");
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}
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if ( show_sessetup ) {
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if (*c->server_domain) {
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DEBUG(0,("Domain=[%s] OS=[%s] Server=[%s]\n",
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c->server_domain,c->server_os,c->server_type));
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} else if (*c->server_os || *c->server_type){
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DEBUG(0,("OS=[%s] Server=[%s]\n",
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c->server_os,c->server_type));
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}
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}
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DEBUG(4,(" session setup ok\n"));
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/* here's the fun part....to support 'msdfs proxy' shares
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(on Samba or windows) we have to issues a TRANS_GET_DFS_REFERRAL
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here before trying to connect to the original share.
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check_dfs_proxy() will fail if it is a normal share. */
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if ( (c->capabilities & CAP_DFS) && cli_check_msdfs_proxy( c, sharename, newserver, newshare ) ) {
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cli_shutdown(c);
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return do_connect( newserver, newshare, False );
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}
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/* must be a normal share */
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if (!cli_send_tconX(c, sharename, "?????", password, strlen(password)+1)) {
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d_printf("tree connect failed: %s\n", cli_errstr(c));
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cli_shutdown(c);
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return NULL;
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}
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DEBUG(4,(" tconx ok\n"));
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return c;
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}
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/****************************************************************************
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****************************************************************************/
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static void cli_cm_set_mntpoint( struct cli_state *c, const char *mnt )
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{
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struct client_connection *p;
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int i;
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for ( p=connections,i=0; p; p=p->next,i++ ) {
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if ( strequal(p->cli->desthost, c->desthost) && strequal(p->cli->share, c->share) )
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break;
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}
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if ( p ) {
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pstrcpy( p->mount, mnt );
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dos_clean_name( p->mount );
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}
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}
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/****************************************************************************
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****************************************************************************/
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const char * cli_cm_get_mntpoint( struct cli_state *c )
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{
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struct client_connection *p;
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int i;
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for ( p=connections,i=0; p; p=p->next,i++ ) {
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if ( strequal(p->cli->desthost, c->desthost) && strequal(p->cli->share, c->share) )
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break;
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}
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if ( p )
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return p->mount;
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return NULL;
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}
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/********************************************************************
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Add a new connection to the list
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********************************************************************/
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static struct cli_state* cli_cm_connect( const char *server, const char *share,
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BOOL show_hdr )
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{
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struct client_connection *node;
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node = SMB_XMALLOC_P( struct client_connection );
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node->cli = do_connect( server, share, show_hdr );
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if ( !node->cli ) {
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SAFE_FREE( node );
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return NULL;
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}
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DLIST_ADD( connections, node );
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cli_cm_set_mntpoint( node->cli, "" );
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return node->cli;
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}
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/********************************************************************
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Return a connection to a server.
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********************************************************************/
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static struct cli_state* cli_cm_find( const char *server, const char *share )
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{
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struct client_connection *p;
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for ( p=connections; p; p=p->next ) {
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if ( strequal(server, p->cli->desthost) && strequal(share,p->cli->share) )
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return p->cli;
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}
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return NULL;
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}
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/****************************************************************************
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open a client connection to a \\server\share. Set's the current *cli
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global variable as a side-effect (but only if the connection is successful).
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****************************************************************************/
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struct cli_state* cli_cm_open( const char *server, const char *share, BOOL show_hdr )
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{
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struct cli_state *c;
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/* try to reuse an existing connection */
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c = cli_cm_find( server, share );
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if ( !c )
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c = cli_cm_connect( server, share, show_hdr );
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return c;
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}
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/****************************************************************************
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****************************************************************************/
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void cli_cm_shutdown( void )
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{
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struct client_connection *p, *x;
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for ( p=connections; p; ) {
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cli_shutdown( p->cli );
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x = p;
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p = p->next;
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SAFE_FREE( x );
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}
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connections = NULL;
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return;
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}
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/****************************************************************************
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****************************************************************************/
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void cli_cm_display(void)
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{
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struct client_connection *p;
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int i;
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for ( p=connections,i=0; p; p=p->next,i++ ) {
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d_printf("%d:\tserver=%s, share=%s\n",
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i, p->cli->desthost, p->cli->share );
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}
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}
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/****************************************************************************
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****************************************************************************/
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void cli_cm_set_credentials( struct user_auth_info *user )
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{
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pstrcpy( username, user->username );
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if ( user->got_pass ) {
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pstrcpy( password, user->password );
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got_pass = True;
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}
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use_kerberos = user->use_kerberos;
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signing_state = user->signing_state;
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}
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/****************************************************************************
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****************************************************************************/
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void cli_cm_set_port( int port_number )
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{
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port = port_number;
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}
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/****************************************************************************
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****************************************************************************/
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void cli_cm_set_dest_name_type( int type )
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{
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name_type = type;
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}
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/****************************************************************************
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****************************************************************************/
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void cli_cm_set_dest_ip(struct in_addr ip )
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{
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dest_ip = ip;
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have_ip = True;
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}
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/********************************************************************
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split a dfs path into the server and share name components
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********************************************************************/
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static void split_dfs_path( const char *nodepath, fstring server, fstring share )
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{
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char *p;
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pstring path;
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pstrcpy( path, nodepath );
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if ( path[0] != '\\' )
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return;
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p = strrchr_m( path, '\\' );
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if ( !p )
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return;
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*p = '\0';
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p++;
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fstrcpy( share, p );
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fstrcpy( server, &path[1] );
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}
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/****************************************************************************
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return the original path truncated at the first wildcard character
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(also strips trailing \'s). Trust the caller to provide a NULL
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terminated string
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****************************************************************************/
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static void clean_path( pstring clean, const char *path )
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{
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int len;
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char *p;
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pstring newpath;
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pstrcpy( newpath, path );
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p = newpath;
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while ( p ) {
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/* first check for '*' */
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p = strrchr_m( newpath, '*' );
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if ( p ) {
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*p = '\0';
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p = newpath;
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continue;
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}
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/* first check for '?' */
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p = strrchr_m( newpath, '?' );
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if ( p ) {
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*p = '\0';
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p = newpath;
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}
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}
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/* strip a trailing backslash */
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len = strlen( newpath );
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if ( (len > 0) && (newpath[len-1] == '\\') )
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newpath[len-1] = '\0';
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pstrcpy( clean, newpath );
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}
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/****************************************************************************
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****************************************************************************/
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BOOL cli_dfs_make_full_path( pstring path, const char *server, const char *share,
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const char *dir )
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{
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pstring servicename;
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char *sharename;
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const char *directory;
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/* make a copy so we don't modify the global string 'service' */
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pstrcpy(servicename, share);
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sharename = servicename;
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if (*sharename == '\\') {
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server = sharename+2;
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sharename = strchr_m(server,'\\');
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if (!sharename)
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return False;
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*sharename = 0;
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sharename++;
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}
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directory = dir;
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if ( *directory == '\\' )
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directory++;
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pstr_sprintf( path, "\\%s\\%s\\%s", server, sharename, directory );
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return True;
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}
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/********************************************************************
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check for dfs referral
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********************************************************************/
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static BOOL cli_dfs_check_error( struct cli_state *cli, NTSTATUS status )
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{
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uint32 flgs2 = SVAL(cli->inbuf,smb_flg2);
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/* only deal with DS when we negotiated NT_STATUS codes and UNICODE */
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if ( !( (flgs2&FLAGS2_32_BIT_ERROR_CODES) && (flgs2&FLAGS2_UNICODE_STRINGS) ) )
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return False;
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if ( NT_STATUS_EQUAL( status, NT_STATUS(IVAL(cli->inbuf,smb_rcls)) ) )
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return True;
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return False;
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}
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/********************************************************************
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get the dfs referral link
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********************************************************************/
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BOOL cli_dfs_get_referral( struct cli_state *cli, const char *path,
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CLIENT_DFS_REFERRAL**refs, size_t *num_refs,
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uint16 *consumed)
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{
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unsigned int data_len = 0;
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unsigned int param_len = 0;
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uint16 setup = TRANSACT2_GET_DFS_REFERRAL;
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char param[sizeof(pstring)+2];
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pstring data;
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char *rparam=NULL, *rdata=NULL;
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char *p;
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size_t pathlen = 2*(strlen(path)+1);
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uint16 num_referrals;
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CLIENT_DFS_REFERRAL *referrals = NULL;
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memset(param, 0, sizeof(param));
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SSVAL(param, 0, 0x03); /* max referral level */
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p = ¶m[2];
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p += clistr_push(cli, p, path, MIN(pathlen, sizeof(param)-2), STR_TERMINATE);
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param_len = PTR_DIFF(p, param);
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|
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if (!cli_send_trans(cli, SMBtrans2,
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NULL, /* name */
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-1, 0, /* fid, flags */
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&setup, 1, 0, /* setup, length, max */
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param, param_len, 2, /* param, length, max */
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(char *)&data, data_len, cli->max_xmit /* data, length, max */
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)) {
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return False;
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}
|
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|
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if (!cli_receive_trans(cli, SMBtrans2,
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&rparam, ¶m_len,
|
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&rdata, &data_len)) {
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return False;
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}
|
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|
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*consumed = SVAL( rdata, 0 );
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num_referrals = SVAL( rdata, 2 );
|
|
|
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if ( num_referrals != 0 ) {
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uint16 ref_version;
|
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uint16 ref_size;
|
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int i;
|
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uint16 node_offset;
|
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|
|
|
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referrals = SMB_XMALLOC_ARRAY( CLIENT_DFS_REFERRAL, num_referrals );
|
|
|
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/* start at the referrals array */
|
|
|
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p = rdata+8;
|
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for ( i=0; i<num_referrals; i++ ) {
|
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ref_version = SVAL( p, 0 );
|
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ref_size = SVAL( p, 2 );
|
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node_offset = SVAL( p, 16 );
|
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|
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if ( ref_version != 3 ) {
|
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p += ref_size;
|
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continue;
|
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}
|
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|
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referrals[i].proximity = SVAL( p, 8 );
|
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referrals[i].ttl = SVAL( p, 10 );
|
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|
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clistr_pull( cli, referrals[i].dfspath, p+node_offset,
|
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sizeof(referrals[i].dfspath), -1, STR_TERMINATE|STR_UNICODE );
|
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|
|
p += ref_size;
|
|
}
|
|
|
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}
|
|
|
|
*num_refs = num_referrals;
|
|
*refs = referrals;
|
|
|
|
SAFE_FREE(rdata);
|
|
SAFE_FREE(rparam);
|
|
|
|
return True;
|
|
}
|
|
|
|
/********************************************************************
|
|
********************************************************************/
|
|
|
|
BOOL cli_resolve_path( const char *mountpt, struct cli_state *rootcli, const char *path,
|
|
struct cli_state **targetcli, pstring targetpath )
|
|
{
|
|
CLIENT_DFS_REFERRAL *refs = NULL;
|
|
size_t num_refs;
|
|
uint16 consumed;
|
|
struct cli_state *cli_ipc;
|
|
pstring fullpath, cleanpath;
|
|
int pathlen;
|
|
fstring server, share;
|
|
struct cli_state *newcli;
|
|
pstring newpath;
|
|
pstring newmount;
|
|
char *ppath;
|
|
|
|
SMB_STRUCT_STAT sbuf;
|
|
uint32 attributes;
|
|
|
|
if ( !rootcli || !path || !targetcli )
|
|
return False;
|
|
|
|
*targetcli = NULL;
|
|
|
|
/* send a trans2_query_path_info to check for a referral */
|
|
|
|
clean_path( cleanpath, path );
|
|
cli_dfs_make_full_path( fullpath, rootcli->desthost, rootcli->share, cleanpath );
|
|
|
|
/* don't bother continuing if this is not a dfs root */
|
|
|
|
if ( !rootcli->dfsroot || cli_qpathinfo_basic( rootcli, cleanpath, &sbuf, &attributes ) ) {
|
|
*targetcli = rootcli;
|
|
pstrcpy( targetpath, path );
|
|
return True;
|
|
}
|
|
|
|
/* special case where client asked for a path that does not exist */
|
|
|
|
if ( cli_dfs_check_error(rootcli, NT_STATUS_OBJECT_NAME_NOT_FOUND) ) {
|
|
*targetcli = rootcli;
|
|
pstrcpy( targetpath, path );
|
|
return True;
|
|
}
|
|
|
|
/* we got an error, check for DFS referral */
|
|
|
|
if ( !cli_dfs_check_error(rootcli, NT_STATUS_PATH_NOT_COVERED) )
|
|
return False;
|
|
|
|
/* check for the referral */
|
|
|
|
if ( !(cli_ipc = cli_cm_open( rootcli->desthost, "IPC$", False )) )
|
|
return False;
|
|
|
|
if ( !cli_dfs_get_referral(cli_ipc, fullpath, &refs, &num_refs, &consumed)
|
|
|| !num_refs )
|
|
{
|
|
return False;
|
|
}
|
|
|
|
/* just store the first referral for now
|
|
Make sure to recreate the original string including any wildcards */
|
|
|
|
cli_dfs_make_full_path( fullpath, rootcli->desthost, rootcli->share, path );
|
|
pathlen = strlen( fullpath )*2;
|
|
consumed = MIN(pathlen, consumed );
|
|
pstrcpy( targetpath, &fullpath[consumed/2] );
|
|
|
|
split_dfs_path( refs[0].dfspath, server, share );
|
|
SAFE_FREE( refs );
|
|
|
|
/* open the connection to the target path */
|
|
|
|
if ( (*targetcli = cli_cm_open(server, share, False)) == NULL ) {
|
|
d_printf("Unable to follow dfs referral [//%s/%s]\n",
|
|
server, share );
|
|
|
|
return False;
|
|
}
|
|
|
|
/* parse out the consumed mount path */
|
|
/* trim off the \server\share\ */
|
|
|
|
fullpath[consumed/2] = '\0';
|
|
dos_clean_name( fullpath );
|
|
if ((ppath = strchr_m( fullpath, '\\' )) == NULL)
|
|
return False;
|
|
if ((ppath = strchr_m( ppath+1, '\\' )) == NULL)
|
|
return False;
|
|
if ((ppath = strchr_m( ppath+1, '\\' )) == NULL)
|
|
return False;
|
|
ppath++;
|
|
|
|
pstr_sprintf( newmount, "%s\\%s", mountpt, ppath );
|
|
cli_cm_set_mntpoint( *targetcli, newmount );
|
|
|
|
/* check for another dfs referral, note that we are not
|
|
checking for loops here */
|
|
|
|
if ( !strequal( targetpath, "\\" ) ) {
|
|
if ( cli_resolve_path( newmount, *targetcli, targetpath, &newcli, newpath ) ) {
|
|
*targetcli = newcli;
|
|
pstrcpy( targetpath, newpath );
|
|
}
|
|
}
|
|
|
|
return True;
|
|
}
|
|
|
|
/********************************************************************
|
|
********************************************************************/
|
|
|
|
BOOL cli_check_msdfs_proxy( struct cli_state *cli, const char *sharename,
|
|
fstring newserver, fstring newshare )
|
|
{
|
|
CLIENT_DFS_REFERRAL *refs = NULL;
|
|
size_t num_refs;
|
|
uint16 consumed;
|
|
pstring fullpath;
|
|
BOOL res;
|
|
uint16 cnum;
|
|
|
|
if ( !cli || !sharename )
|
|
return False;
|
|
|
|
cnum = cli->cnum;
|
|
|
|
/* special case. never check for a referral on the IPC$ share */
|
|
|
|
if ( strequal( sharename, "IPC$" ) )
|
|
return False;
|
|
|
|
/* send a trans2_query_path_info to check for a referral */
|
|
|
|
pstr_sprintf( fullpath, "\\%s\\%s", cli->desthost, sharename );
|
|
|
|
/* check for the referral */
|
|
|
|
if (!cli_send_tconX(cli, "IPC$", "IPC", NULL, 0)) {
|
|
return False;
|
|
}
|
|
|
|
res = cli_dfs_get_referral(cli, fullpath, &refs, &num_refs, &consumed);
|
|
|
|
if (!cli_tdis(cli)) {
|
|
SAFE_FREE( refs );
|
|
return False;
|
|
}
|
|
|
|
cli->cnum = cnum;
|
|
|
|
if (!res || !num_refs ) {
|
|
SAFE_FREE( refs );
|
|
return False;
|
|
}
|
|
|
|
split_dfs_path( refs[0].dfspath, newserver, newshare );
|
|
|
|
/* check that this is not a self-referral */
|
|
|
|
if ( strequal( cli->desthost, newserver ) && strequal( sharename, newshare ) ) {
|
|
SAFE_FREE( refs );
|
|
return False;
|
|
}
|
|
|
|
SAFE_FREE( refs );
|
|
|
|
return True;
|
|
}
|