source/smbd/connection.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 1.9.
   4    connection claim routines
   5    Copyright (C) Andrew Tridgell 1998
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23
  24
  25 extern fstring remote_machine;
  26 static TDB_CONTEXT *tdb;
  27
  28 extern int DEBUGLEVEL;
  29
  30 /****************************************************************************
  31 delete a connection record
  32 ****************************************************************************/
  33 BOOL yield_connection(connection_struct *conn,char *name,int max_connections)
  34 {
  35         struct connections_key key;
  36         TDB_DATA kbuf;
  37
  38         if (!tdb) return False;
  39
  40         DEBUG(3,("Yielding connection to %s\n",name));
  41
  42         ZERO_STRUCT(key);
  43         key.pid = getpid();
  44         if (conn) key.cnum = conn->cnum;
  45         fstrcpy(key.name, name);
  46
  47         kbuf.dptr = (char *)&key;
  48         kbuf.dsize = sizeof(key);
  49
  50         tdb_delete(tdb, kbuf);
  51         return(True);
  52 }
  53
  54
  55 /****************************************************************************
  56 claim an entry in the connections database
  57 ****************************************************************************/
  58 BOOL claim_connection(connection_struct *conn,char *name,int max_connections,BOOL Clear)
  59 {
  60         struct connections_key key;
  61         struct connections_data crec;
  62         TDB_DATA kbuf, dbuf;
  63
  64         if (max_connections <= 0)
  65                 return(True);
  66
  67         if (!tdb) {
  68                 tdb = tdb_open(lock_path("connections.tdb"), 0, TDB_CLEAR_IF_FIRST,
  69                                O_RDWR | O_CREAT, 0644);
  70         }
  71         if (!tdb) return False;
  72
  73         DEBUG(5,("claiming %s %d\n",name,max_connections));
  74
  75         ZERO_STRUCT(key);
  76         key.pid = getpid();
  77         key.cnum = conn?conn->cnum:-1;
  78         fstrcpy(key.name, name);
  79
  80         kbuf.dptr = (char *)&key;
  81         kbuf.dsize = sizeof(key);
  82
  83         /* fill in the crec */
  84         ZERO_STRUCT(crec);
  85         crec.magic = 0x280267;
  86         crec.pid = getpid();
  87         crec.cnum = conn?conn->cnum:-1;
  88         if (conn) {
  89                 crec.uid = conn->uid;
  90                 crec.gid = conn->gid;
  91                 StrnCpy(crec.name,
  92                         lp_servicename(SNUM(conn)),sizeof(crec.name)-1);
  93         }
  94         crec.start = time(NULL);
  95
  96         StrnCpy(crec.machine,remote_machine,sizeof(crec.machine)-1);
  97         StrnCpy(crec.addr,conn?conn->client_address:client_connection_addr(),sizeof(crec.addr)-1);
  98
  99         dbuf.dptr = (char *)&crec;
 100         dbuf.dsize = sizeof(crec);
 101
 102         if (tdb_store(tdb, kbuf, dbuf, TDB_REPLACE) != 0) return False;
 103
 104         return True;
 105 }