Unix SMB/CIFS implementation.
SMB client generic functions
Copyright (C) Andrew Tridgell 1994-1998
+ Copyright (C) Jeremy Allison 2007.
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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
-extern int smb_read_error;
+/*******************************************************************
+ Setup the word count and byte count for a client smb message.
+********************************************************************/
+
+int cli_set_message(char *buf,int num_words,int num_bytes,bool zero)
+{
+ if (zero && (num_words || num_bytes)) {
+ memset(buf + smb_size,'\0',num_words*2 + num_bytes);
+ }
+ SCVAL(buf,smb_wct,num_words);
+ SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
+ smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
+ return (smb_size + num_words*2 + num_bytes);
+}
/****************************************************************************
Change the timeout (in milliseconds).
Change the port number used to call on.
****************************************************************************/
-int cli_set_port(struct cli_state *cli, int port)
+void cli_set_port(struct cli_state *cli, int port)
{
cli->port = port;
- return port;
}
/****************************************************************************
- Read an smb from a fd ignoring all keepalive packets. Note that the buffer
- *MUST* be of size BUFFER_SIZE+SAFETY_MARGIN.
+ convenience routine to find if we negotiated ucs2
+****************************************************************************/
+
+bool cli_ucs2(struct cli_state *cli)
+{
+ return ((cli->capabilities & CAP_UNICODE) != 0);
+}
+
+
+/****************************************************************************
+ Read an smb from a fd ignoring all keepalive packets.
The timeout is in milliseconds
- This is exactly the same as receive_smb except that it can be set to never return
+ This is exactly the same as receive_smb except that it never returns
a session keepalive packet (just as receive_smb used to do).
receive_smb was changed to return keepalives as the oplock processing means this call
should never go into a blocking read.
****************************************************************************/
-static BOOL client_receive_smb(struct cli_state *cli, BOOL eat_keepalives)
+static ssize_t client_receive_smb(struct cli_state *cli, size_t maxlen)
{
- BOOL ret;
- int fd = cli->fd;
- char *buffer = cli->inbuf;
- unsigned int timeout = cli->timeout;
+ size_t len;
for(;;) {
- ret = receive_smb_raw(fd, buffer, timeout);
+ NTSTATUS status;
+
+ set_smb_read_error(&cli->smb_rw_error, SMB_READ_OK);
- if (!ret) {
+ status = receive_smb_raw(cli->fd, cli->inbuf, cli->bufsize,
+ cli->timeout, maxlen, &len);
+ if (!NT_STATUS_IS_OK(status)) {
DEBUG(10,("client_receive_smb failed\n"));
- show_msg(buffer);
- return ret;
+ show_msg(cli->inbuf);
+
+ if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
+ set_smb_read_error(&cli->smb_rw_error,
+ SMB_READ_EOF);
+ return -1;
+ }
+
+ if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) {
+ set_smb_read_error(&cli->smb_rw_error,
+ SMB_READ_TIMEOUT);
+ return -1;
+ }
+
+ set_smb_read_error(&cli->smb_rw_error, SMB_READ_ERROR);
+ return -1;
+ }
+
+ /*
+ * I don't believe len can be < 0 with NT_STATUS_OK
+ * returned above, but this check doesn't hurt. JRA.
+ */
+
+ if ((ssize_t)len < 0) {
+ return len;
}
/* Ignore session keepalive packets. */
- if (eat_keepalives && (CVAL(buffer,0) == SMBkeepalive)) {
- continue;
+ if(CVAL(cli->inbuf,0) != SMBkeepalive) {
+ break;
}
- break;
}
if (cli_encryption_on(cli)) {
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("SMB decryption failed on incoming packet! Error %s\n",
nt_errstr(status)));
- cli->smb_rw_error = READ_BAD_DECRYPT;
- close(cli->fd);
- cli->fd = -1;
- return False;
+ cli->smb_rw_error = SMB_READ_BAD_DECRYPT;
+ return -1;
}
}
- show_msg(buffer);
- return ret;
+
+ show_msg(cli->inbuf);
+ return len;
}
/****************************************************************************
Recv an smb.
****************************************************************************/
-BOOL cli_receive_smb_internal(struct cli_state *cli, BOOL eat_keepalives)
+bool cli_receive_smb(struct cli_state *cli)
{
- BOOL ret;
+ ssize_t len;
/* fd == -1 causes segfaults -- Tom (tom@ninja.nl) */
if (cli->fd == -1)
- return False;
+ return false;
again:
- ret = client_receive_smb(cli, eat_keepalives);
+ len = client_receive_smb(cli, 0);
- if (ret) {
+ if (len > 0) {
/* it might be an oplock break request */
if (!(CVAL(cli->inbuf, smb_flg) & FLAG_REPLY) &&
CVAL(cli->inbuf,smb_com) == SMBlockingX &&
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;
+ if (!cli->oplock_handler(cli, fnum, level)) {
+ return false;
+ }
}
/* try to prevent loops */
SCVAL(cli->inbuf,smb_com,0xFF);
}
/* If the server is not responding, note that now */
- if (!ret) {
+ if (len < 0) {
DEBUG(0, ("Receiving SMB: Server stopped responding\n"));
- cli->smb_rw_error = smb_read_error;
close(cli->fd);
cli->fd = -1;
- return ret;
+ return false;
}
- if (!cli_check_sign_mac(cli)) {
+ if (!cli_check_sign_mac(cli, cli->inbuf)) {
+ /*
+ * If we get a signature failure in sessionsetup, then
+ * the server sometimes just reflects the sent signature
+ * back to us. Detect this and allow the upper layer to
+ * retrieve the correct Windows error message.
+ */
+ if (CVAL(cli->outbuf,smb_com) == SMBsesssetupX &&
+ (smb_len(cli->inbuf) > (smb_ss_field + 8 - 4)) &&
+ (SVAL(cli->inbuf,smb_flg2) & FLAGS2_SMB_SECURITY_SIGNATURES) &&
+ memcmp(&cli->outbuf[smb_ss_field],&cli->inbuf[smb_ss_field],8) == 0 &&
+ cli_is_error(cli)) {
+
+ /*
+ * Reflected signature on login error.
+ * Set bad sig but don't close fd.
+ */
+ cli->smb_rw_error = SMB_READ_BAD_SIG;
+ return true;
+ }
+
DEBUG(0, ("SMB Signature verification failed on incoming packet!\n"));
- cli->smb_rw_error = READ_BAD_SIG;
+ cli->smb_rw_error = SMB_READ_BAD_SIG;
close(cli->fd);
cli->fd = -1;
- return False;
- }
-
- return True;
+ return false;
+ };
+ return true;
}
/****************************************************************************
- Recv an smb - eat keepalives.
+ Read the data portion of a readX smb.
+ The timeout is in milliseconds
****************************************************************************/
-BOOL cli_receive_smb(struct cli_state *cli)
+ssize_t cli_receive_smb_data(struct cli_state *cli, char *buffer, size_t len)
{
- return cli_receive_smb_internal(cli, True);
-}
+ NTSTATUS status;
-/****************************************************************************
- Recv an smb - return keepalives.
-****************************************************************************/
+ set_smb_read_error(&cli->smb_rw_error, SMB_READ_OK);
-BOOL cli_receive_smb_return_keepalive(struct cli_state *cli)
-{
- return cli_receive_smb_internal(cli, False);
+ status = read_socket_with_timeout(
+ cli->fd, buffer, len, len, cli->timeout, NULL);
+ if (NT_STATUS_IS_OK(status)) {
+ return len;
+ }
+
+ if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
+ set_smb_read_error(&cli->smb_rw_error, SMB_READ_EOF);
+ return -1;
+ }
+
+ if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) {
+ set_smb_read_error(&cli->smb_rw_error, SMB_READ_TIMEOUT);
+ return -1;
+ }
+
+ set_smb_read_error(&cli->smb_rw_error, SMB_READ_ERROR);
+ return -1;
}
static ssize_t write_socket(int fd, const char *buf, size_t len)
{
ssize_t ret=0;
-
+
DEBUG(6,("write_socket(%d,%d)\n",fd,(int)len));
ret = write_data(fd,buf,len);
if(ret <= 0)
DEBUG(0,("write_socket: Error writing %d bytes to socket %d: ERRNO = %s\n",
(int)len, fd, strerror(errno) ));
-
+
return(ret);
}
Send an smb to a fd.
****************************************************************************/
-BOOL cli_send_smb(struct cli_state *cli)
+bool cli_send_smb(struct cli_state *cli)
{
size_t len;
size_t nwritten=0;
ssize_t ret;
char *buf_out = cli->outbuf;
- BOOL enc_on = cli_encryption_on(cli);
+ bool enc_on = cli_encryption_on(cli);
/* fd == -1 causes segfaults -- Tom (tom@ninja.nl) */
- if (cli->fd == -1) {
- return False;
- }
+ if (cli->fd == -1)
+ return false;
- cli_calculate_sign_mac(cli);
+ cli_calculate_sign_mac(cli, cli->outbuf);
if (enc_on) {
- NTSTATUS status = cli_encrypt_message(cli, &buf_out);
+ NTSTATUS status = cli_encrypt_message(cli, cli->outbuf,
+ &buf_out);
if (!NT_STATUS_IS_OK(status)) {
close(cli->fd);
cli->fd = -1;
- cli->smb_rw_error = WRITE_ERROR;
+ cli->smb_rw_error = SMB_WRITE_ERROR;
DEBUG(0,("Error in encrypting client message. Error %s\n",
nt_errstr(status) ));
- return False;
+ return false;
}
}
}
close(cli->fd);
cli->fd = -1;
- cli->smb_rw_error = WRITE_ERROR;
+ cli->smb_rw_error = SMB_WRITE_ERROR;
DEBUG(0,("Error writing %d bytes to client. %d (%s)\n",
(int)len,(int)ret, strerror(errno) ));
- return False;
+ return false;
}
nwritten += ret;
}
- cli_free_enc_buffer(cli, buf_out);
+ if (enc_on) {
+ cli_free_enc_buffer(cli, buf_out);
+ }
/* Increment the mid so we can tell between responses. */
cli->mid++;
- if (!cli->mid) {
+ if (!cli->mid)
cli->mid++;
+ return true;
+}
+
+/****************************************************************************
+ Send a "direct" writeX smb to a fd.
+****************************************************************************/
+
+bool cli_send_smb_direct_writeX(struct cli_state *cli,
+ const char *p,
+ size_t extradata)
+{
+ /* First length to send is the offset to the data. */
+ size_t len = SVAL(cli->outbuf,smb_vwv11) + 4;
+ size_t nwritten=0;
+ struct iovec iov[2];
+
+ /* fd == -1 causes segfaults -- Tom (tom@ninja.nl) */
+ if (cli->fd == -1) {
+ return false;
+ }
+
+ if (client_is_signing_on(cli)) {
+ DEBUG(0,("cli_send_smb_large: cannot send signed packet.\n"));
+ return false;
+ }
+
+ iov[0].iov_base = cli->outbuf;
+ iov[0].iov_len = len;
+ iov[1].iov_base = CONST_DISCARD(char *, p);
+ iov[1].iov_len = extradata;
+
+ nwritten = write_data_iov(cli->fd, iov, 2);
+ if (nwritten < (len + extradata)) {
+ close(cli->fd);
+ cli->fd = -1;
+ cli->smb_rw_error = SMB_WRITE_ERROR;
+ DEBUG(0,("Error writing %d bytes to client. (%s)\n",
+ (int)(len+extradata), strerror(errno)));
+ return false;
}
- return True;
+
+ /* Increment the mid so we can tell between responses. */
+ cli->mid++;
+ if (!cli->mid)
+ cli->mid++;
+ return true;
}
/****************************************************************************
Setup basics in a outgoing packet.
****************************************************************************/
-void cli_setup_packet(struct cli_state *cli)
+void cli_setup_packet_buf(struct cli_state *cli, char *buf)
{
+ uint16 flags2;
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;
- if (cli->case_sensitive) {
- SCVAL(cli->outbuf,smb_flg,0x0);
- } else {
- /* Default setting, case insensitive. */
- SCVAL(cli->outbuf,smb_flg,0x8);
- }
- flags2 = FLAGS2_LONG_PATH_COMPONENTS;
- if (cli->capabilities & CAP_UNICODE)
- flags2 |= FLAGS2_UNICODE_STRINGS;
- if ((cli->capabilities & CAP_DFS) && cli->dfsroot)
- flags2 |= FLAGS2_DFS_PATHNAMES;
- 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);
+ SIVAL(buf,smb_rcls,0);
+ SSVAL(buf,smb_pid,cli->pid);
+ memset(buf+smb_pidhigh, 0, 12);
+ SSVAL(buf,smb_uid,cli->vuid);
+ SSVAL(buf,smb_mid,cli->mid);
+
+ if (cli->protocol <= PROTOCOL_CORE) {
+ return;
+ }
+
+ if (cli->case_sensitive) {
+ SCVAL(buf,smb_flg,0x0);
+ } else {
+ /* Default setting, case insensitive. */
+ SCVAL(buf,smb_flg,0x8);
}
+ flags2 = FLAGS2_LONG_PATH_COMPONENTS;
+ if (cli->capabilities & CAP_UNICODE)
+ flags2 |= FLAGS2_UNICODE_STRINGS;
+ if ((cli->capabilities & CAP_DFS) && cli->dfsroot)
+ flags2 |= FLAGS2_DFS_PATHNAMES;
+ if (cli->capabilities & CAP_STATUS32)
+ flags2 |= FLAGS2_32_BIT_ERROR_CODES;
+ if (cli->use_spnego)
+ flags2 |= FLAGS2_EXTENDED_SECURITY;
+ SSVAL(buf,smb_flg2, flags2);
+}
+
+void cli_setup_packet(struct cli_state *cli)
+{
+ cli_setup_packet_buf(cli, cli->outbuf);
}
/****************************************************************************
fstrcpy(cli->user_name, username);
pwd_set_cleartext(&cli->pwd, password);
if (!*username) {
- cli->pwd.null_pwd = True;
+ cli->pwd.null_pwd = true;
}
DEBUG(10,("cli_init_creds: user %s domain %s\n", cli->user_name, cli->domain));
Set the signing state (used from the command line).
****************************************************************************/
-void cli_setup_signing_state(struct cli_state *cli, int signing_state)
+static void cli_setup_signing_state(struct cli_state *cli, int signing_state)
{
if (signing_state == Undefined)
return;
- if (signing_state == False) {
- cli->sign_info.allow_smb_signing = False;
- cli->sign_info.mandatory_signing = False;
+ if (signing_state == false) {
+ cli->sign_info.allow_smb_signing = false;
+ cli->sign_info.mandatory_signing = false;
return;
}
- cli->sign_info.allow_smb_signing = True;
+ cli->sign_info.allow_smb_signing = true;
if (signing_state == Required)
- cli->sign_info.mandatory_signing = True;
+ cli->sign_info.mandatory_signing = true;
}
/****************************************************************************
Initialise a client structure. Always returns a malloc'ed struct.
****************************************************************************/
-struct cli_state *cli_initialise(void)
+struct cli_state *cli_initialise_ex(int signing_state)
{
struct cli_state *cli = NULL;
return NULL;
}
- cli = SMB_MALLOC_P(struct cli_state);
+ cli = TALLOC_ZERO_P(NULL, struct cli_state);
if (!cli) {
return NULL;
}
- ZERO_STRUCTP(cli);
-
cli->port = 0;
cli->fd = -1;
cli->cnum = -1;
cli->outbuf = (char *)SMB_MALLOC(cli->bufsize+SAFETY_MARGIN);
cli->inbuf = (char *)SMB_MALLOC(cli->bufsize+SAFETY_MARGIN);
cli->oplock_handler = cli_oplock_ack;
- cli->case_sensitive = False;
- cli->smb_rw_error = 0;
+ cli->case_sensitive = false;
+ cli->smb_rw_error = SMB_READ_OK;
cli->use_spnego = lp_client_use_spnego();
client routines using DOS errors instead of STATUS32
ones. This intended only as a temporary hack. */
if (getenv("CLI_FORCE_DOSERR"))
- cli->force_dos_errors = True;
+ cli->force_dos_errors = true;
if (lp_client_signing())
- cli->sign_info.allow_smb_signing = True;
+ cli->sign_info.allow_smb_signing = true;
if (lp_client_signing() == Required)
- cli->sign_info.mandatory_signing = True;
+ cli->sign_info.mandatory_signing = true;
if (!cli->outbuf || !cli->inbuf)
goto error;
- if ((cli->mem_ctx = talloc_init("cli based talloc")) == NULL)
- goto error;
-
memset(cli->outbuf, 0, cli->bufsize);
memset(cli->inbuf, 0, cli->bufsize);
/* initialise signing */
cli_null_set_signing(cli);
+ cli_setup_signing_state(cli, signing_state);
cli->initialised = 1;
return NULL;
}
-/****************************************************************************
- External interface.
- Close an open named pipe over SMB. Free any authentication data.
- Returns False if the cli_close call failed.
- ****************************************************************************/
-
-BOOL cli_rpc_pipe_close(struct rpc_pipe_client *cli)
+struct cli_state *cli_initialise(void)
{
- BOOL ret;
-
- if (!cli) {
- return False;
- }
-
- ret = cli_close(cli->cli, cli->fnum);
-
- if (!ret) {
- DEBUG(1,("cli_rpc_pipe_close: cli_close failed on pipe %s, "
- "fnum 0x%x "
- "to machine %s. Error was %s\n",
- cli->pipe_name,
- (int) cli->fnum,
- cli->cli->desthost,
- cli_errstr(cli->cli)));
- }
-
- if (cli->auth.cli_auth_data_free_func) {
- (*cli->auth.cli_auth_data_free_func)(&cli->auth);
- }
-
- DEBUG(10,("cli_rpc_pipe_close: closed pipe %s to machine %s\n",
- cli->pipe_name, cli->cli->desthost ));
-
- DLIST_REMOVE(cli->cli->pipe_list, cli);
- talloc_destroy(cli->mem_ctx);
- return ret;
+ return cli_initialise_ex(Undefined);
}
/****************************************************************************
void cli_nt_pipes_close(struct cli_state *cli)
{
- struct rpc_pipe_client *cp, *next;
-
- for (cp = cli->pipe_list; cp; cp = next) {
- next = cp->next;
- cli_rpc_pipe_close(cp);
+ while (cli->pipe_list != NULL) {
+ /*
+ * No TALLOC_FREE here!
+ */
+ talloc_free(cli->pipe_list);
}
}
* later. This tree disconnect forces the peer to clean up, since the
* connection will be going away.
*
- * Also, do not do tree disconnect when cli->smb_rw_error is DO_NOT_DO_TDIS
+ * Also, do not do tree disconnect when cli->smb_rw_error is SMB_DO_NOT_DO_TDIS
* the only user for this so far is smbmount which passes opened connection
* down to kernel's smbfs module.
*/
- if ( (cli->cnum != (uint16)-1) && (cli->smb_rw_error != DO_NOT_DO_TDIS ) ) {
+ if ( (cli->cnum != (uint16)-1) && (cli->smb_rw_error != SMB_DO_NOT_DO_TDIS ) ) {
cli_tdis(cli);
}
SAFE_FREE(cli->inbuf);
cli_free_signing_context(cli);
- cli_free_encryption_context(cli);
-
data_blob_free(&cli->secblob);
data_blob_free(&cli->user_session_key);
- if (cli->mem_ctx) {
- talloc_destroy(cli->mem_ctx);
- cli->mem_ctx = NULL;
- }
-
if (cli->fd != -1) {
close(cli->fd);
}
cli->fd = -1;
- cli->smb_rw_error = 0;
+ cli->smb_rw_error = SMB_READ_OK;
- SAFE_FREE(cli);
+ TALLOC_FREE(cli);
}
/****************************************************************************
Set the case sensitivity flag on the packets. Returns old state.
****************************************************************************/
-BOOL cli_set_case_sensitive(struct cli_state *cli, BOOL case_sensitive)
+bool cli_set_case_sensitive(struct cli_state *cli, bool case_sensitive)
{
- BOOL ret = cli->case_sensitive;
+ bool ret = cli->case_sensitive;
cli->case_sensitive = case_sensitive;
return ret;
}
Send a keepalive packet to the server
****************************************************************************/
-BOOL cli_send_keepalive(struct cli_state *cli)
+bool cli_send_keepalive(struct cli_state *cli)
{
if (cli->fd == -1) {
DEBUG(3, ("cli_send_keepalive: fd == -1\n"));
- return False;
+ return false;
}
if (!send_keepalive(cli->fd)) {
close(cli->fd);
cli->fd = -1;
DEBUG(0,("Error sending keepalive packet to client.\n"));
- return False;
+ return false;
}
- return True;
+ return true;
}
-/****************************************************************************
- Send/receive a SMBecho command: ping the server
-****************************************************************************/
+/**
+ * @brief: Collect a echo reply
+ * @param[in] req The corresponding async request
+ *
+ * There might be more than one echo reply. This helper pulls the reply out of
+ * the data stream. If all expected replies have arrived, declare the
+ * async_req done.
+ */
-BOOL cli_echo(struct cli_state *cli, unsigned char *data, size_t length)
+static void cli_echo_recv_helper(struct async_req *req)
{
- char *p;
+ struct cli_request *cli_req;
+ uint8_t wct;
+ uint16_t *vwv;
+ uint16_t num_bytes;
+ uint8_t *bytes;
+ NTSTATUS status;
+
+ status = cli_pull_reply(req, &wct, &vwv, &num_bytes, &bytes);
+ if (!NT_STATUS_IS_OK(status)) {
+ async_req_nterror(req, status);
+ return;
+ }
- SMB_ASSERT(length < 1024);
+ cli_req = talloc_get_type_abort(req->private_data, struct cli_request);
- memset(cli->outbuf,'\0',smb_size);
- set_message(cli->outbuf,1,length,True);
- SCVAL(cli->outbuf,smb_com,SMBecho);
- SSVAL(cli->outbuf,smb_tid,65535);
- SSVAL(cli->outbuf,smb_vwv0,1);
- cli_setup_packet(cli);
- p = smb_buf(cli->outbuf);
- memcpy(p, data, length);
- p += length;
+ if ((num_bytes != cli_req->data.echo.data.length)
+ || (memcmp(cli_req->data.echo.data.data, bytes,
+ num_bytes) != 0)) {
+ async_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
+ return;
+ }
- cli_setup_bcc(cli, p);
+ cli_req->data.echo.num_echos -= 1;
- cli_send_smb(cli);
- if (!cli_receive_smb(cli)) {
- return False;
+ if (cli_req->data.echo.num_echos == 0) {
+ client_set_trans_sign_state_off(cli_req->cli, cli_req->mid);
+ async_req_done(req);
+ return;
}
- if (cli_is_error(cli)) {
- return False;
+ return;
+}
+
+/**
+ * @brief Send SMBEcho requests
+ * @param[in] mem_ctx The memory context to put the async_req on
+ * @param[in] ev The event context that will call us back
+ * @param[in] cli The connection to send the echo to
+ * @param[in] num_echos How many times do we want to get the reply?
+ * @param[in] data The data we want to get back
+ * @retval The async request
+ */
+
+struct async_req *cli_echo_send(TALLOC_CTX *mem_ctx, struct event_context *ev,
+ struct cli_state *cli, uint16_t num_echos,
+ DATA_BLOB data)
+{
+ uint16_t vwv[1];
+ uint8_t *data_copy;
+ struct async_req *result;
+ struct cli_request *req;
+
+ SSVAL(vwv, 0, num_echos);
+
+ data_copy = (uint8_t *)talloc_memdup(mem_ctx, data.data, data.length);
+ if (data_copy == NULL) {
+ return NULL;
+ }
+
+ result = cli_request_send(mem_ctx, ev, cli, SMBecho, 0, 1, vwv, 0,
+ data.length, data.data);
+ if (result == NULL) {
+ TALLOC_FREE(data_copy);
+ return NULL;
+ }
+ req = talloc_get_type_abort(result->private_data, struct cli_request);
+
+ client_set_trans_sign_state_on(cli, req->mid);
+
+ req->data.echo.num_echos = num_echos;
+ req->data.echo.data.data = talloc_move(req, &data_copy);
+ req->data.echo.data.length = data.length;
+
+ req->recv_helper.fn = cli_echo_recv_helper;
+
+ return result;
+}
+
+/**
+ * Get the result out from an echo request
+ * @param[in] req The async_req from cli_echo_send
+ * @retval Did the server reply correctly?
+ */
+
+NTSTATUS cli_echo_recv(struct async_req *req)
+{
+ return async_req_simple_recv_ntstatus(req);
+}
+
+/**
+ * @brief Send/Receive SMBEcho requests
+ * @param[in] mem_ctx The memory context to put the async_req on
+ * @param[in] ev The event context that will call us back
+ * @param[in] cli The connection to send the echo to
+ * @param[in] num_echos How many times do we want to get the reply?
+ * @param[in] data The data we want to get back
+ * @retval Did the server reply correctly?
+ */
+
+NTSTATUS cli_echo(struct cli_state *cli, uint16_t num_echos, DATA_BLOB data)
+{
+ TALLOC_CTX *frame = talloc_stackframe();
+ struct event_context *ev;
+ struct async_req *req;
+ NTSTATUS status = NT_STATUS_NO_MEMORY;
+
+ if (cli->fd_event != NULL) {
+ /*
+ * Can't use sync call while an async call is in flight
+ */
+ cli_set_error(cli, NT_STATUS_INVALID_PARAMETER);
+ goto fail;
+ }
+
+ ev = event_context_init(frame);
+ if (ev == NULL) {
+ goto fail;
+ }
+
+ req = cli_echo_send(frame, ev, cli, num_echos, data);
+ if (req == NULL) {
+ goto fail;
+ }
+
+ while (req->state < ASYNC_REQ_DONE) {
+ event_loop_once(ev);
}
- return True;
+
+ status = cli_echo_recv(req);
+
+ fail:
+ TALLOC_FREE(frame);
+ return status;
+}
+
+/**
+ * Is the SMB command able to hold an AND_X successor
+ * @param[in] cmd The SMB command in question
+ * @retval Can we add a chained request after "cmd"?
+ */
+bool is_andx_req(uint8_t cmd)
+{
+ switch (cmd) {
+ case SMBtconX:
+ case SMBlockingX:
+ case SMBopenX:
+ case SMBreadX:
+ case SMBwriteX:
+ case SMBsesssetupX:
+ case SMBulogoffX:
+ case SMBntcreateX:
+ return true;
+ break;
+ default:
+ break;
+ }
+
+ return false;
}
git.samba.org / ira / wip.git / blobdiff