/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+ Unix SMB/CIFS implementation.
connection claim routines
Copyright (C) Andrew Tridgell 1998
#include "includes.h"
-
-extern fstring remote_machine;
static TDB_CONTEXT *tdb;
-extern int DEBUGLEVEL;
-
/****************************************************************************
Return the connection tdb context (used for message send all).
****************************************************************************/
TDB_CONTEXT *conn_tdb_ctx(void)
{
+ if (!tdb)
+ tdb = tdb_open_log(lock_path("connections.tdb"), 0, TDB_CLEAR_IF_FIRST|TDB_DEFAULT,
+ O_RDWR | O_CREAT, 0644);
+
return tdb;
}
+static void make_conn_key(connection_struct *conn, const char *name, TDB_DATA *pkbuf, struct connections_key *pkey)
+{
+ ZERO_STRUCTP(pkey);
+ pkey->pid = procid_self();
+ pkey->cnum = conn?conn->cnum:-1;
+ fstrcpy(pkey->name, name);
+#ifdef DEVELOPER
+ /* valgrind fixer... */
+ {
+ size_t sl = strlen(pkey->name);
+ if (sizeof(fstring)-sl)
+ memset(&pkey->name[sl], '\0', sizeof(fstring)-sl);
+ }
+#endif
+
+ pkbuf->dptr = (char *)pkey;
+ pkbuf->dsize = sizeof(*pkey);
+}
+
/****************************************************************************
Delete a connection record.
****************************************************************************/
-BOOL yield_connection(connection_struct *conn,char *name,int max_connections)
+BOOL yield_connection(connection_struct *conn, const char *name)
{
struct connections_key key;
TDB_DATA kbuf;
- if (!tdb) return False;
+ if (!tdb)
+ return False;
DEBUG(3,("Yielding connection to %s\n",name));
- ZERO_STRUCT(key);
- key.pid = sys_getpid();
- key.cnum = conn?conn->cnum:-1;
- fstrcpy(key.name, name);
-
- kbuf.dptr = (char *)&key;
- kbuf.dsize = sizeof(key);
+ make_conn_key(conn, name, &kbuf, &key);
if (tdb_delete(tdb, kbuf) != 0) {
- DEBUG(0,("yield_connection: tdb_delete failed with error %s.\n", tdb_errorstr(tdb) ));
+ int dbg_lvl = (!conn && (tdb_error(tdb) == TDB_ERR_NOEXIST)) ? 3 : 0;
+ DEBUG(dbg_lvl,("yield_connection: tdb_delete for name %s failed with error %s.\n",
+ name, tdb_errorstr(tdb) ));
return (False);
}
memcpy(&crec, dbuf.dptr, sizeof(crec));
- if (crec.cnum == -1)
+ if (crec.cnum == -1)
return 0;
/* If the pid was not found delete the entry from connections.tdb */
if (cs->Clear && !process_exists(crec.pid) && (errno == ESRCH)) {
- DEBUG(2,("pid %u doesn't exist - deleting connections %d [%s]\n",
- (unsigned int)crec.pid, crec.cnum, crec.name));
+ DEBUG(2,("pid %s doesn't exist - deleting connections %d [%s]\n",
+ procid_str_static(&crec.pid), crec.cnum, crec.name));
if (tdb_delete(the_tdb, kbuf) != 0)
DEBUG(0,("count_fn: tdb_delete failed with error %s\n", tdb_errorstr(tdb) ));
return 0;
Claim an entry in the connections database.
****************************************************************************/
-BOOL claim_connection(connection_struct *conn,char *name,int max_connections,BOOL Clear)
+BOOL claim_connection(connection_struct *conn, const char *name,int max_connections,BOOL Clear, uint32 msg_flags)
{
struct connections_key key;
struct connections_data crec;
- TDB_DATA kbuf, dbuf, lockkey;
- BOOL rec_locked = False;
- BOOL ret = True;
+ TDB_DATA kbuf, dbuf;
- if (!tdb) {
- tdb = tdb_open_log(lock_path("connections.tdb"), 0, TDB_CLEAR_IF_FIRST,
+ if (!tdb)
+ tdb = tdb_open_log(lock_path("connections.tdb"), 0, TDB_CLEAR_IF_FIRST|TDB_DEFAULT,
O_RDWR | O_CREAT, 0644);
- }
+
if (!tdb)
return False;
cs.name = lp_servicename(SNUM(conn));
cs.Clear = Clear;
- lockkey.dptr = cs.name;
- lockkey.dsize = strlen(cs.name)+1;
-
/*
- * Go through and count the connections with hash chain representing the service name
- * locked. This is slow but removes race conditions. JRA.
+ * This has a race condition, but locking the chain before hand is worse
+ * as it leads to deadlock.
*/
- if (tdb_chainlock(tdb, lockkey)) {
- DEBUG(0,("claim_connection: tdb_chainlock failed %s\n",
- tdb_errorstr(tdb) ));
- return False;
- }
-
- rec_locked = True;
-
if (tdb_traverse(tdb, count_fn, &cs) == -1) {
DEBUG(0,("claim_connection: traverse of connections.tdb failed with error %s.\n",
tdb_errorstr(tdb) ));
- ret = False;
- goto out;
+ return False;
}
if (cs.curr_connections >= max_connections) {
DEBUG(1,("claim_connection: Max connections (%d) exceeded for %s\n",
max_connections, name ));
- ret = False;
- goto out;
+ return False;
}
}
DEBUG(5,("claiming %s %d\n",name,max_connections));
- ZERO_STRUCT(key);
- key.pid = sys_getpid();
- key.cnum = conn?conn->cnum:-1;
- fstrcpy(key.name, name);
-
- kbuf.dptr = (char *)&key;
- kbuf.dsize = sizeof(key);
+ make_conn_key(conn, name, &kbuf, &key);
/* fill in the crec */
ZERO_STRUCT(crec);
crec.magic = 0x280267;
- crec.pid = sys_getpid();
+ crec.pid = procid_self();
crec.cnum = conn?conn->cnum:-1;
if (conn) {
crec.uid = conn->uid;
crec.gid = conn->gid;
- StrnCpy(crec.name,
- lp_servicename(SNUM(conn)),sizeof(crec.name)-1);
+ safe_strcpy(crec.name,
+ lp_servicename(SNUM(conn)),sizeof(crec.name)-1);
}
crec.start = time(NULL);
+ crec.bcast_msg_flags = msg_flags;
- StrnCpy(crec.machine,remote_machine,sizeof(crec.machine)-1);
- StrnCpy(crec.addr,conn?conn->client_address:client_addr(),sizeof(crec.addr)-1);
+ safe_strcpy(crec.machine,get_remote_machine_name(),sizeof(crec.machine)-1);
+ safe_strcpy(crec.addr,conn?conn->client_address:client_addr(),sizeof(crec.addr)-1);
dbuf.dptr = (char *)&crec;
dbuf.dsize = sizeof(crec);
if (tdb_store(tdb, kbuf, dbuf, TDB_REPLACE) != 0) {
DEBUG(0,("claim_connection: tdb_store failed with error %s.\n",
tdb_errorstr(tdb) ));
- ret = False;
+ return False;
+ }
+
+ return True;
+}
+
+BOOL register_message_flags(BOOL doreg, uint32 msg_flags)
+{
+ struct connections_key key;
+ struct connections_data *pcrec;
+ TDB_DATA kbuf, dbuf;
+
+ if (!tdb)
+ return False;
+
+ DEBUG(10,("register_message_flags: %s flags 0x%x\n",
+ doreg ? "adding" : "removing",
+ (unsigned int)msg_flags ));
+
+ make_conn_key(NULL, "", &kbuf, &key);
+
+ dbuf = tdb_fetch(tdb, kbuf);
+ if (!dbuf.dptr) {
+ DEBUG(0,("register_message_flags: tdb_fetch failed: %s\n",
+ tdb_errorstr(tdb)));
+ return False;
}
- out:
+ pcrec = (struct connections_data *)dbuf.dptr;
+ if (doreg)
+ pcrec->bcast_msg_flags |= msg_flags;
+ else
+ pcrec->bcast_msg_flags &= ~msg_flags;
+
+ if (tdb_store(tdb, kbuf, dbuf, TDB_REPLACE) != 0) {
+ DEBUG(0,("register_message_flags: tdb_store failed: %s.\n",
+ tdb_errorstr(tdb) ));
+ SAFE_FREE(dbuf.dptr);
+ return False;
+ }
- if (rec_locked)
- tdb_chainunlock(tdb, lockkey);
+ DEBUG(10,("register_message_flags: new flags 0x%x\n",
+ (unsigned int)pcrec->bcast_msg_flags ));
- return ret;
+ SAFE_FREE(dbuf.dptr);
+ return True;
}