moved connection_struct handling code into smbd/conn.c and changed it

to a linked list with bitmap format.

1 files changed, 196 insertions, 0 deletions

diff --git a/source/smbd/conn.c b/source/smbd/conn.c
new file mode 100644
index 00000000000..b110e8d0828
--- /dev/null
+++ b/source/smbd/conn.c
@@ -0,0 +1,196 @@
+/* 
+   Unix SMB/Netbios implementation.
+   Version 1.9.
+   Manage connections_struct structures
+   Copyright (C) Andrew Tridgell 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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+extern int DEBUGLEVEL;
+
+/* set these to define the limits of the server. NOTE These are on a
+   per-client basis. Thus any one machine can't connect to more than
+   MAX_CONNECTIONS services, but any number of machines may connect at
+   one time. */
+#define MAX_CONNECTIONS 128
+
+static connection_struct *Connections;
+
+/* number of open connections */
+static struct bitmap *bmap;
+static int num_open;
+
+/****************************************************************************
+init the conn structures
+****************************************************************************/
+void conn_init(void)
+{
+	bmap = bitmap_allocate(MAX_CONNECTIONS);
+}
+
+/****************************************************************************
+return the number of open connections
+****************************************************************************/
+int conn_num_open(void)
+{
+	return num_open;
+}
+
+
+/****************************************************************************
+check if a snum is in use
+****************************************************************************/
+BOOL conn_snum_used(int snum)
+{
+	connection_struct *conn;
+	for (conn=Connections;conn;conn=conn->next) {
+		if (conn->service == snum) {
+			return(True);
+		}
+	}
+	return(False);
+}
+
+
+/****************************************************************************
+find a conn given a cnum
+****************************************************************************/
+connection_struct *conn_find(int cnum)
+{
+	connection_struct *conn;
+
+	for (conn=Connections;conn;conn=conn->next) {
+		if (conn->cnum == cnum) return conn;
+	}
+
+	return NULL;
+}
+
+
+/****************************************************************************
+  find first available connection slot, starting from a random position.
+The randomisation stops problems with the server dieing and clients
+thinking the server is still available.
+****************************************************************************/
+connection_struct *conn_new(void)
+{
+	connection_struct *conn;
+	int i;
+
+	i = bitmap_find(bmap, 1);
+	
+	if (i == -1) {
+		DEBUG(1,("ERROR! Out of connection structures\n"));	       
+		return NULL;
+	}
+
+	conn = (connection_struct *)malloc(sizeof(*conn));
+	if (!conn) return NULL;
+
+	memset(conn, 0, sizeof(*conn));
+	conn->cnum = i;
+
+	bitmap_set(bmap, i);
+
+	num_open++;
+
+	string_init(&conn->user,"");
+	string_init(&conn->dirpath,"");
+	string_init(&conn->connectpath,"");
+	string_init(&conn->origpath,"");
+	
+	/* hook into the front of the list */
+	if (!Connections) {
+		Connections = conn;
+	} else {
+		Connections->prev = conn;
+		conn->next = Connections;
+		Connections = conn;
+	}
+
+	return conn;
+}
+
+/****************************************************************************
+close all conn structures
+****************************************************************************/
+void conn_close_all(void)
+{
+	connection_struct *conn, *next;
+	for (conn=Connections;conn;conn=next) {
+		next=conn->next;
+		close_cnum(conn, (uint16)-1);
+	}
+}
+
+/****************************************************************************
+idle inactive connections
+****************************************************************************/
+BOOL conn_idle_all(time_t t, int deadtime)
+{
+	BOOL allidle = True;
+	connection_struct *conn, *next;
+
+	for (conn=Connections;conn;conn=next) {
+		next=conn->next;
+		/* close dirptrs on connections that are idle */
+		if ((t-conn->lastused) > DPTR_IDLE_TIMEOUT)
+			dptr_idlecnum(conn);
+
+		if (conn->num_files_open > 0 || 
+		    (t-conn->lastused)<deadtime)
+			allidle = False;
+	}
+
+	return allidle;
+}
+
+/****************************************************************************
+free a conn structure
+****************************************************************************/
+void conn_free(connection_struct *conn)
+{
+	if (conn == Connections) {
+		Connections = conn->next;
+		if (Connections) Connections->prev = NULL;
+	} else {
+		conn->prev->next = conn->next;
+		if (conn->next) conn->next->prev = conn->prev;
+	}
+
+	if (conn->ngroups && conn->groups) {
+		free(conn->groups);
+		conn->groups = NULL;
+		conn->ngroups = 0;
+	}
+
+	free_namearray(conn->veto_list);
+	free_namearray(conn->hide_list);
+	free_namearray(conn->veto_oplock_list);
+	
+	string_free(&conn->user);
+	string_free(&conn->dirpath);
+	string_free(&conn->connectpath);
+	string_free(&conn->origpath);
+
+	bitmap_clear(bmap, conn->cnum);
+	num_open--;
+
+	memset(conn, 0, sizeof(*conn));
+	free(conn);
+}