--- /dev/null
+/*
+ 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;
+ pstring path;
+
+ pstrcpy( path, nodepath );
+
+ if ( path[0] != '\\' )
+ return;
+
+ p = strrchr_m( path, '\\' );
+
+ if ( !p )
+ return;
+
+ *p = '\0';
+ p++;
+
+ fstrcpy( share, p );
+ fstrcpy( server, &path[1] );
+}
+
+/****************************************************************************
+ return the original path truncated at the first wildcard character
+ (also strips trailing \'s). Trust the caller to provide a NULL
+ terminated string
+****************************************************************************/
+
+static void clean_path( pstring clean, const char *path )
+{
+ int len;
+ char *p;
+ pstring newpath;
+
+ pstrcpy( newpath, path );
+ p = newpath;
+
+ while ( p ) {
+ /* first check for '*' */
+
+ p = strrchr_m( newpath, '*' );
+ if ( p ) {
+ *p = '\0';
+ p = newpath;
+ continue;
+ }
+
+ /* first check for '?' */
+
+ p = strrchr_m( newpath, '?' );
+ if ( p ) {
+ *p = '\0';
+ p = newpath;
+ }
+ }
+
+ /* strip a trailing backslash */
+
+ len = strlen( newpath );
+ if ( newpath[len-1] == '\\' )
+ newpath[len-1] = '\0';
+
+ pstrcpy( clean, newpath );
+}
+
+/****************************************************************************
+****************************************************************************/
+
+BOOL cli_dfs_make_full_path( pstring path, const char *server, const char *share,
+ const char *dir )
+{
+ pstring servicename;
+ char *sharename;
+ const char *directory;
+
+
+ /* 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 False;
+
+ *sharename = 0;
+ sharename++;
+ }
+
+ directory = dir;
+ if ( *directory == '\\' )
+ directory++;
+
+ pstr_sprintf( path, "\\%s\\%s\\%s", server, sharename, directory );
+
+ return True;
+}
+
+/********************************************************************
+ check for dfs referral
+********************************************************************/
+
+static BOOL cli_dfs_check_error( struct cli_state *cli, NTSTATUS status )
+{
+ uint32 flgs2 = SVAL(cli->inbuf,smb_flg2);
+
+ /* only deal with DS when we negotiated NT_STATUS codes and UNICODE */
+
+ if ( !( (flgs2&FLAGS2_32_BIT_ERROR_CODES) && (flgs2&FLAGS2_UNICODE_STRINGS) ) )
+ return False;
+
+ if ( NT_STATUS_EQUAL( status, NT_STATUS(IVAL(cli->inbuf,smb_rcls)) ) )
+ return True;
+
+ return False;
+}
+
+/********************************************************************
+ get the dfs referral link
+********************************************************************/
+
+BOOL cli_dfs_get_referral( struct cli_state *cli, const char *path,
+ CLIENT_DFS_REFERRAL**refs, size_t *num_refs,
+ uint16 *consumed)
+{
+ unsigned int data_len = 0;
+ unsigned int param_len = 0;
+ uint16 setup = TRANSACT2_GET_DFS_REFERRAL;
+ char param[sizeof(pstring)+2];
+ pstring data;
+ char *rparam=NULL, *rdata=NULL;
+ char *p;
+ size_t pathlen = 2*(strlen(path)+1);
+ uint16 num_referrals;
+ CLIENT_DFS_REFERRAL *referrals = NULL;
+
+ memset(param, 0, sizeof(param));
+ SSVAL(param, 0, 0x03); /* max referral level */
+ p = ¶m[2];
+
+ p += clistr_push(cli, p, path, MIN(pathlen, sizeof(param)-2), STR_TERMINATE);
+ param_len = PTR_DIFF(p, param);
+
+ if (!cli_send_trans(cli, SMBtrans2,
+ NULL, /* name */
+ -1, 0, /* fid, flags */
+ &setup, 1, 0, /* setup, length, max */
+ param, param_len, 2, /* param, length, max */
+ (char *)&data, data_len, cli->max_xmit /* data, length, max */
+ )) {
+ return False;
+ }
+
+ if (!cli_receive_trans(cli, SMBtrans2,
+ &rparam, ¶m_len,
+ &rdata, &data_len)) {
+ return False;
+ }
+
+ *consumed = SVAL( rdata, 0 );
+ num_referrals = SVAL( rdata, 2 );
+
+ if ( num_referrals != 0 ) {
+ uint16 ref_version;
+ uint16 ref_size;
+ int i;
+ uint16 node_offset;
+
+
+ referrals = SMB_XMALLOC_ARRAY( CLIENT_DFS_REFERRAL, num_referrals );
+
+ /* start at the referrals array */
+
+ p = rdata+8;
+ for ( i=0; i<num_referrals; i++ ) {
+ ref_version = SVAL( p, 0 );
+ ref_size = SVAL( p, 2 );
+ node_offset = SVAL( p, 16 );
+
+ if ( ref_version != 3 ) {
+ p += ref_size;
+ continue;
+ }
+
+ referrals[i].proximity = SVAL( p, 8 );
+ referrals[i].ttl = SVAL( p, 10 );
+
+ clistr_pull( cli, referrals[i].dfspath, p+node_offset,
+ sizeof(referrals[i].dfspath), -1, STR_TERMINATE|STR_UNICODE );
+
+ p += ref_size;
+ }
+
+ }
+
+ *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;
+
+ *targetcli = NULL;
+
+ if ( !rootcli || !path || !targetcli )
+ return False;
+
+ /* 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$", False )) )
+ return False;
+
+ if ( !cli_dfs_get_referral(cli_ipc, fullpath, &refs, &num_refs, &consumed)
+ || !num_refs )
+ {
+ return False;
+ }
+
+ /* just store the first referral for now
+ Make sure to recreate the original string including any wildcards */
+
+ cli_dfs_make_full_path( fullpath, rootcli->desthost, rootcli->share, path );
+ pathlen = strlen( fullpath )*2;
+ consumed = MIN(pathlen, consumed );
+ pstrcpy( targetpath, &fullpath[consumed/2] );
+
+ split_dfs_path( refs[0].dfspath, server, share );
+ SAFE_FREE( refs );
+
+ /* open the connection to the target path */
+
+ if ( (*targetcli = cli_cm_open(server, share, False)) == NULL ) {
+ d_printf("Unable to follow dfs referral [//%s/%s]\n",
+ server, share );
+
+ return False;
+ }
+
+ /* parse out the consumed mount path */
+ /* trim off the \server\share\ */
+
+ fullpath[consumed/2] = '\0';
+ dos_clean_name( fullpath );
+ ppath = strchr_m( fullpath, '\\' );
+ ppath = strchr_m( ppath+1, '\\' );
+ ppath = strchr_m( ppath+1, '\\' );
+ ppath++;
+
+ pstr_sprintf( newmount, "%s\\%s", mountpt, ppath );
+ cli_cm_set_mntpoint( *targetcli, newmount );
+
+ /* check for another dfs referral, note that we are not
+ checking for loops here */
+
+ if ( !strequal( targetpath, "\\" ) ) {
+ if ( cli_resolve_path( newmount, *targetcli, targetpath, &newcli, newpath ) ) {
+ *targetcli = newcli;
+ pstrcpy( targetpath, newpath );
+ }
+ }
+
+ return True;
+}
+
+/********************************************************************
+********************************************************************/
+
+BOOL cli_check_msdfs_proxy( struct cli_state *cli, const char *sharename,
+ fstring newserver, fstring newshare )
+{
+ CLIENT_DFS_REFERRAL *refs = NULL;
+ size_t num_refs;
+ uint16 consumed;
+ struct cli_state *cli_ipc;
+ pstring fullpath;
+
+ if ( !cli || !sharename )
+ return False;
+
+ /* special case. never check for a referral on the IPC$ share */
+
+ if ( strequal( sharename, "IPC$" ) )
+ return False;
+
+ /* send a trans2_query_path_info to check for a referral */
+
+ pstr_sprintf( fullpath, "\\%s\\%s", cli->desthost, sharename );
+
+ /* check for the referral */
+
+ if ( !(cli_ipc = cli_cm_open( cli->desthost, "IPC$", False )) )
+ return False;
+
+ if ( !cli_dfs_get_referral(cli_ipc, fullpath, &refs, &num_refs, &consumed)
+ || !num_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 ) )
+ return False;
+
+ SAFE_FREE( refs );
+
+ return True;
+}
projects / samba / blobdiff