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/*
Unix SMB/Netbios implementation.
Version 1.9.
SMB client generic functions
Copyright (C) Andrew Tridgell 1994-1998
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.
*/
#define NO_SYSLOG
#include "includes.h"
/*
* Change the port number used to call on
*/
int cli_set_port(struct cli_state *cli, int port)
{
cli->port = port;
return port;
}
/****************************************************************************
recv an smb
****************************************************************************/
BOOL cli_receive_smb(struct cli_state *cli)
{
BOOL ret;
/* fd == -1 causes segfaults -- Tom (tom@ninja.nl) */
if (cli->fd == -1) return False;
again:
ret = client_receive_smb(cli->fd,cli->inbuf,cli->timeout);
if (ret) {
/* it might be an oplock break request */
if (!(CVAL(cli->inbuf, smb_flg) & FLAG_REPLY) &&
CVAL(cli->inbuf,smb_com) == SMBlockingX &&
SVAL(cli->inbuf,smb_vwv6) == 0 &&
SVAL(cli->inbuf,smb_vwv7) == 0) {
if (cli->oplock_handler) {
int fnum = SVAL(cli->inbuf,smb_vwv2);
unsigned char level = CVAL(cli->inbuf,smb_vwv3+1);
if (!cli->oplock_handler(cli, fnum, level)) return False;
}
/* try to prevent loops */
CVAL(cli->inbuf,smb_com) = 0xFF;
goto again;
}
}
/* If the server is not responding, note that now */
if (!ret) {
close(cli->fd);
cli->fd = -1;
}
return ret;
}
/****************************************************************************
send an smb to a fd.
****************************************************************************/
BOOL cli_send_smb(struct cli_state *cli)
{
size_t len;
size_t nwritten=0;
ssize_t ret;
/* fd == -1 causes segfaults -- Tom (tom@ninja.nl) */
if (cli->fd == -1) return False;
len = smb_len(cli->outbuf) + 4;
while (nwritten < len) {
ret = write_socket(cli->fd,cli->outbuf+nwritten,len - nwritten);
if (ret <= 0) {
close(cli->fd);
cli->fd = -1;
DEBUG(0,("Error writing %d bytes to client. %d\n",
(int)len,(int)ret));
return False;
}
nwritten += ret;
}
return True;
}
/****************************************************************************
setup basics in a outgoing packet
****************************************************************************/
void cli_setup_packet(struct cli_state *cli)
{
cli->rap_error = 0;
SSVAL(cli->outbuf,smb_pid,cli->pid);
SSVAL(cli->outbuf,smb_uid,cli->vuid);
SSVAL(cli->outbuf,smb_mid,cli->mid);
if (cli->protocol > PROTOCOL_CORE) {
uint16 flags2;
SCVAL(cli->outbuf,smb_flg,0x8);
flags2 = FLAGS2_LONG_PATH_COMPONENTS;
if (cli->capabilities & CAP_UNICODE) {
flags2 |= FLAGS2_UNICODE_STRINGS;
}
if (cli->capabilities & CAP_STATUS32) {
flags2 |= FLAGS2_32_BIT_ERROR_CODES;
}
if (cli->use_spnego) {
flags2 |= FLAGS2_EXTENDED_SECURITY;
}
SSVAL(cli->outbuf,smb_flg2, flags2);
}
}
/****************************************************************************
setup the bcc length of the packet from a pointer to the end of the data
****************************************************************************/
void cli_setup_bcc(struct cli_state *cli, void *p)
{
set_message_bcc(cli->outbuf, PTR_DIFF(p, smb_buf(cli->outbuf)));
}
/****************************************************************************
initialise a client structure
****************************************************************************/
void cli_init_creds(struct cli_state *cli, const struct ntuser_creds *usr)
{
/* copy_nt_creds(&cli->usr, usr); */
safe_strcpy(cli->domain , usr->domain , sizeof(usr->domain )-1);
safe_strcpy(cli->user_name, usr->user_name, sizeof(usr->user_name)-1);
memcpy(&cli->pwd, &usr->pwd, sizeof(usr->pwd));
cli->ntlmssp_flags = usr->ntlmssp_flags;
cli->ntlmssp_cli_flgs = usr != NULL ? usr->ntlmssp_flags : 0;
DEBUG(10,("cli_init_creds: user %s domain %s flgs: %x\nntlmssp_cli_flgs:%x\n",
cli->user_name, cli->domain,
cli->ntlmssp_flags,cli->ntlmssp_cli_flgs));
}
/****************************************************************************
initialise a client structure
****************************************************************************/
struct cli_state *cli_initialise(struct cli_state *cli)
{
BOOL alloced_cli = False;
/* Check the effective uid - make sure we are not setuid */
if (is_setuid_root()) {
DEBUG(0,("libsmb based programs must *NOT* be setuid root.\n"));
return NULL;
}
if (!cli) {
cli = (struct cli_state *)malloc(sizeof(*cli));
if (!cli)
return NULL;
ZERO_STRUCTP(cli);
alloced_cli = True;
}
if (cli->initialised) {
cli_shutdown(cli);
}
ZERO_STRUCTP(cli);
cli->port = 0;
cli->fd = -1;
cli->cnum = -1;
cli->pid = (uint16)sys_getpid();
cli->mid = 1;
cli->vuid = UID_FIELD_INVALID;
cli->protocol = PROTOCOL_NT1;
cli->timeout = 20000; /* Timeout is in milliseconds. */
cli->bufsize = CLI_BUFFER_SIZE+4;
cli->max_xmit = cli->bufsize;
cli->outbuf = (char *)malloc(cli->bufsize);
cli->inbuf = (char *)malloc(cli->bufsize);
cli->oplock_handler = cli_oplock_ack;
cli->use_spnego = True;
if (!cli->outbuf || !cli->inbuf)
goto error;
if ((cli->mem_ctx = talloc_init()) == NULL)
goto error;
memset(cli->outbuf, 0, cli->bufsize);
memset(cli->inbuf, 0, cli->bufsize);
cli->nt_pipe_fnum = 0;
cli->initialised = 1;
return cli;
/* Clean up after malloc() error */
error:
SAFE_FREE(cli->inbuf);
SAFE_FREE(cli->outbuf);
if (alloced_cli)
SAFE_FREE(cli);
return NULL;
}
/****************************************************************************
shutdown a client structure
****************************************************************************/
void cli_shutdown(struct cli_state *cli)
{
SAFE_FREE(cli->outbuf);
SAFE_FREE(cli->inbuf);
data_blob_free(&cli->secblob);
if (cli->mem_ctx)
talloc_destroy(cli->mem_ctx);
#ifdef WITH_SSL
if (cli->fd != -1)
sslutil_disconnect(cli->fd);
#endif /* WITH_SSL */
if (cli->fd != -1)
close(cli->fd);
memset(cli, 0, sizeof(*cli));
}
/****************************************************************************
set socket options on a open connection
****************************************************************************/
void cli_sockopt(struct cli_state *cli, char *options)
{
set_socket_options(cli->fd, options);
}
/****************************************************************************
set the PID to use for smb messages. Return the old pid.
****************************************************************************/
uint16 cli_setpid(struct cli_state *cli, uint16 pid)
{
uint16 ret = cli->pid;
cli->pid = pid;
return ret;
}
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