source/smbd/message.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    SMB messaging
   4    Copyright (C) Andrew Tridgell 1992-1998
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20 /*
  21    This file handles the messaging system calls for winpopup style
  22    messages
  23 */
  24
  25
  26 #include "includes.h"
  27
  28 extern userdom_struct current_user_info;
  29
  30 /* look in server.c for some explanation of these variables */
  31 static char msgbuf[1600];
  32 static int msgpos;
  33 static fstring msgfrom;
  34 static fstring msgto;
  35
  36 /****************************************************************************
  37  Deliver the message.
  38 ****************************************************************************/
  39
  40 static void msg_deliver(void)
  41 {
  42         pstring name;
  43         int i;
  44         int fd;
  45         char *msg;
  46         int len;
  47         ssize_t sz;
  48
  49         if (! (*lp_msg_command())) {
  50                 DEBUG(1,("no messaging command specified\n"));
  51                 msgpos = 0;
  52                 return;
  53         }
  54
  55         /* put it in a temporary file */
  56         slprintf(name,sizeof(name)-1, "%s/msg.XXXXXX",tmpdir());
  57         fd = smb_mkstemp(name);
  58
  59         if (fd == -1) {
  60                 DEBUG(1,("can't open message file %s\n",name));
  61                 return;
  62         }
  63
  64         /*
  65          * Incoming message is in DOS codepage format. Convert to UNIX.
  66          */
  67
  68         if ((len = (int)convert_string_allocate(NULL,CH_DOS, CH_UNIX, msgbuf, msgpos, (void **)(void *)&msg, True)) < 0 || !msg) {
  69                 DEBUG(3,("Conversion failed, delivering message in DOS codepage format\n"));
  70                 for (i = 0; i < msgpos;) {
  71                         if (msgbuf[i] == '\r' && i < (msgpos-1) && msgbuf[i+1] == '\n') {
  72                                 i++;
  73                                 continue;
  74                         }
  75                         sz = write(fd, &msgbuf[i++], 1);
  76                         if ( sz != 1 ) {
  77                                 DEBUG(0,("Write error to fd %d: %ld(%d)\n",fd, (long)sz, errno ));
  78                         }
  79                 }
  80         } else {
  81                 for (i = 0; i < len;) {
  82                         if (msg[i] == '\r' && i < (len-1) && msg[i+1] == '\n') {
  83                                 i++;
  84                                 continue;
  85                         }
  86                         sz = write(fd, &msg[i++],1);
  87                         if ( sz != 1 ) {
  88                                 DEBUG(0,("Write error to fd %d: %ld(%d)\n",fd, (long)sz, errno ));
  89                         }
  90                 }
  91                 SAFE_FREE(msg);
  92         }
  93         close(fd);
  94
  95         /* run the command */
  96         if (*lp_msg_command()) {
  97                 fstring alpha_msgfrom;
  98                 fstring alpha_msgto;
  99                 pstring s;
 100
 101                 pstrcpy(s,lp_msg_command());
 102                 pstring_sub(s,"%f",alpha_strcpy(alpha_msgfrom,msgfrom,NULL,sizeof(alpha_msgfrom)));
 103                 pstring_sub(s,"%t",alpha_strcpy(alpha_msgto,msgto,NULL,sizeof(alpha_msgto)));
 104                 standard_sub_basic(current_user_info.smb_name,
 105                                 current_user_info.domain, s, sizeof(s));
 106                 pstring_sub(s,"%s",name);
 107                 smbrun(s,NULL);
 108         }
 109
 110         msgpos = 0;
 111 }
 112
 113 /****************************************************************************
 114  Reply to a sends.
 115  conn POINTER CAN BE NULL HERE !
 116 ****************************************************************************/
 117
 118 int reply_sends(connection_struct *conn, char *inbuf,char *outbuf, int dum_size, int dum_buffsize)
 119 {
 120         int len;
 121         char *msg;
 122         int outsize = 0;
 123         char *p;
 124
 125         START_PROFILE(SMBsends);
 126
 127         msgpos = 0;
 128
 129         if (! (*lp_msg_command())) {
 130                 END_PROFILE(SMBsends);
 131                 return(ERROR_DOS(ERRSRV,ERRmsgoff));
 132         }
 133
 134         outsize = set_message(outbuf,0,0,True);
 135
 136         p = smb_buf(inbuf)+1;
 137         p += srvstr_pull_buf(inbuf, msgfrom, p, sizeof(msgfrom), STR_ASCII|STR_TERMINATE) + 1;
 138         p += srvstr_pull_buf(inbuf, msgto, p, sizeof(msgto), STR_ASCII|STR_TERMINATE) + 1;
 139
 140         msg = p;
 141
 142         len = SVAL(msg,0);
 143         len = MIN(len,sizeof(msgbuf)-msgpos);
 144
 145         memset(msgbuf,'\0',sizeof(msgbuf));
 146
 147         memcpy(&msgbuf[msgpos],msg+2,len);
 148         msgpos += len;
 149
 150         msg_deliver();
 151
 152         END_PROFILE(SMBsends);
 153         return(outsize);
 154 }
 155
 156 /****************************************************************************
 157  Reply to a sendstrt.
 158  conn POINTER CAN BE NULL HERE !
 159 ****************************************************************************/
 160
 161 int reply_sendstrt(connection_struct *conn, char *inbuf,char *outbuf, int dum_size, int dum_buffsize)
 162 {
 163         int outsize = 0;
 164         char *p;
 165
 166         START_PROFILE(SMBsendstrt);
 167
 168         if (! (*lp_msg_command())) {
 169                 END_PROFILE(SMBsendstrt);
 170                 return(ERROR_DOS(ERRSRV,ERRmsgoff));
 171         }
 172
 173         outsize = set_message(outbuf,1,0,True);
 174
 175         memset(msgbuf,'\0',sizeof(msgbuf));
 176         msgpos = 0;
 177
 178         p = smb_buf(inbuf)+1;
 179         p += srvstr_pull_buf(inbuf, msgfrom, p, sizeof(msgfrom), STR_ASCII|STR_TERMINATE) + 1;
 180         p += srvstr_pull_buf(inbuf, msgto, p, sizeof(msgto), STR_ASCII|STR_TERMINATE) + 1;
 181
 182         DEBUG( 3, ( "SMBsendstrt (from %s to %s)\n", msgfrom, msgto ) );
 183
 184         END_PROFILE(SMBsendstrt);
 185         return(outsize);
 186 }
 187
 188 /****************************************************************************
 189  Reply to a sendtxt.
 190  conn POINTER CAN BE NULL HERE !
 191 ****************************************************************************/
 192
 193 int reply_sendtxt(connection_struct *conn, char *inbuf,char *outbuf, int dum_size, int dum_buffsize)
 194 {
 195         int len;
 196         int outsize = 0;
 197         char *msg;
 198         START_PROFILE(SMBsendtxt);
 199
 200         if (! (*lp_msg_command())) {
 201                 END_PROFILE(SMBsendtxt);
 202                 return(ERROR_DOS(ERRSRV,ERRmsgoff));
 203         }
 204
 205         outsize = set_message(outbuf,0,0,True);
 206
 207         msg = smb_buf(inbuf) + 1;
 208
 209         len = SVAL(msg,0);
 210         len = MIN(len,sizeof(msgbuf)-msgpos);
 211
 212         memcpy(&msgbuf[msgpos],msg+2,len);
 213         msgpos += len;
 214
 215         DEBUG( 3, ( "SMBsendtxt\n" ) );
 216
 217         END_PROFILE(SMBsendtxt);
 218         return(outsize);
 219 }
 220
 221 /****************************************************************************
 222  Reply to a sendend.
 223  conn POINTER CAN BE NULL HERE !
 224 ****************************************************************************/
 225
 226 int reply_sendend(connection_struct *conn, char *inbuf,char *outbuf, int dum_size, int dum_buffsize)
 227 {
 228         int outsize = 0;
 229         START_PROFILE(SMBsendend);
 230
 231         if (! (*lp_msg_command())) {
 232                 END_PROFILE(SMBsendend);
 233                 return(ERROR_DOS(ERRSRV,ERRmsgoff));
 234         }
 235
 236         outsize = set_message(outbuf,0,0,True);
 237
 238         DEBUG(3,("SMBsendend\n"));
 239
 240         msg_deliver();
 241
 242         END_PROFILE(SMBsendend);
 243         return(outsize);
 244 }