source: branches/samba-3.3.x/source/libsmb/climessage.c

/* 
   Unix SMB/CIFS implementation.
   client message handling routines
   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 3 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, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"

/****************************************************************************
 Start a message sequence.
****************************************************************************/

int cli_message_start_build(struct cli_state *cli, const char *host, const char *username)
{
        char *p;

        /* construct a SMBsendstrt command */
        memset(cli->outbuf,'\0',smb_size);
        cli_set_message(cli->outbuf,0,0,True);
        SCVAL(cli->outbuf,smb_com,SMBsendstrt);
        SSVAL(cli->outbuf,smb_tid,cli->cnum);
        cli_setup_packet(cli);

        p = smb_buf(cli->outbuf);
        *p++ = 4;
        p += clistr_push(cli, p, username,
                        cli->bufsize - PTR_DIFF(p,cli->outbuf), STR_ASCII|STR_TERMINATE);
        *p++ = 4;
        p += clistr_push(cli, p, host,
                        cli->bufsize - PTR_DIFF(p,cli->outbuf), STR_ASCII|STR_TERMINATE);

        cli_setup_bcc(cli, p);

        return(PTR_DIFF(p, cli->outbuf));
}

bool cli_message_start(struct cli_state *cli, const char *host, const char *username,
                              int *grp)
{
        cli_message_start_build(cli, host, username);
        cli_send_smb(cli);

        if (!cli_receive_smb(cli)) {
                return False;
        }

        if (cli_is_error(cli)) return False;

        *grp = SVAL(cli->inbuf,smb_vwv0);

        return True;
}

/****************************************************************************
 Send a message
****************************************************************************/

int cli_message_text_build(struct cli_state *cli, const char *msg, int len, int grp)
{
        char *msgdos;
        size_t lendos;
        char *p;

        memset(cli->outbuf,'\0',smb_size);
        cli_set_message(cli->outbuf,1,0,True);
        SCVAL(cli->outbuf,smb_com,SMBsendtxt);
        SSVAL(cli->outbuf,smb_tid,cli->cnum);
        cli_setup_packet(cli);

        SSVAL(cli->outbuf,smb_vwv0,grp);

        p = smb_buf(cli->outbuf);
        *p++ = 1;

        if (!convert_string_allocate(NULL, CH_UNIX, CH_DOS, msg, len,
                (void **)(void *)&msgdos, &lendos, True) || !msgdos) {
                DEBUG(3,("Conversion failed, sending message in UNIX charset\n"));
                SSVAL(p, 0, len); p += 2;
                if (len > cli->bufsize - PTR_DIFF(p,cli->outbuf)) {
                        return -1;
                }
                memcpy(p, msg, len);
                p += len;
        } else {
                SSVAL(p, 0, lendos); p += 2;
                if (lendos > cli->bufsize - PTR_DIFF(p,cli->outbuf)) {
                        return -1;
                }
                memcpy(p, msgdos, lendos);
                p += lendos;
                SAFE_FREE(msgdos);
        }

        cli_setup_bcc(cli, p);

        return(PTR_DIFF(p, cli->outbuf));
}

bool cli_message_text(struct cli_state *cli, const char *msg, int len, int grp)
{
        cli_message_text_build(cli, msg, len, grp);

        cli_send_smb(cli);

        if (!cli_receive_smb(cli)) {
                return False;
        }

        if (cli_is_error(cli)) return False;

        return True;
}

/****************************************************************************
 End a message.
****************************************************************************/

int cli_message_end_build(struct cli_state *cli, int grp)
{
        char *p;

        memset(cli->outbuf,'\0',smb_size);
        cli_set_message(cli->outbuf,1,0,True);
        SCVAL(cli->outbuf,smb_com,SMBsendend);
        SSVAL(cli->outbuf,smb_tid,cli->cnum);

        SSVAL(cli->outbuf,smb_vwv0,grp);

        cli_setup_packet(cli);

        p = smb_buf(cli->outbuf);

        return(PTR_DIFF(p, cli->outbuf));
}

bool cli_message_end(struct cli_state *cli, int grp)
{
        cli_message_end_build(cli, grp);

        cli_send_smb(cli);

        if (!cli_receive_smb(cli)) {
                return False;
        }

        if (cli_is_error(cli)) return False;

        return True;
}