X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/ed90ea49e025e0c8083f9d98768d870e6a880f13..27329d23aaad449c60072a3f00ec961195abdbc9:/garden.c

diff --git a/garden.c b/garden.c
index 7477089..41e46a2 100644
--- a/garden.c
+++ b/garden.c
@@ -7,18 +7,23 @@
 #include "plugin.h"
 #include "control.h"
 
-int __plugin_api_version = 1;
+/* walled garden */
+
+char const *cvs_id = "$Id: garden.c,v 1.12 2004/11/09 08:05:02 bodea Exp $";
+
+int __plugin_api_version = PLUGIN_API_VERSION;
 static struct pluginfuncs *p = 0;
 
 static int iam_master = 0;	// We're all slaves! Slaves I tell you!
 
 char *up_commands[] = {
-	"iptables -t nat -N garden >/dev/null 2>&1",	// Create a chain that all gardened users will go through
+	"iptables -t nat -N garden >/dev/null 2>&1",			// Create a chain that all gardened users will go through
 	"iptables -t nat -F garden",
-	". " PLUGINCONF "/build-garden",		// Populate with site-specific DNAT rules
-	"iptables -t nat -N garden_users >/dev/null 2>&1",// Empty chain, users added/removed by garden_session
+	". " PLUGINCONF "/build-garden",				// Populate with site-specific DNAT rules
+	"iptables -t nat -N garden_users >/dev/null 2>&1",		// Empty chain, users added/removed by garden_session
 	"iptables -t nat -F garden_users",
-	"iptables -t nat -A PREROUTING -j garden_users",	// DNAT any users on the garden_users chain
+	"iptables -t nat -A PREROUTING -j garden_users",		// DNAT any users on the garden_users chain
+	"sysctl -w net.ipv4.ip_conntrack_max=256000 >/dev/null",	// lots of entries
 	NULL,
 };
 
@@ -28,7 +33,10 @@ char *down_commands[] = {
 	"iptables -t nat -X garden_users",
 	"iptables -t nat -F garden",
 	"iptables -t nat -X garden",
-	"rmmod iptable_nat ip_conntrack",
+	"rmmod iptable_nat",	// Should also remove ip_conntrack, but
+				// doing so can take hours...  literally.
+				// If a master is re-started as a slave,
+				// either rmmod manually, or reboot.
 	NULL,
 };
 
@@ -143,7 +151,7 @@ int garden_session(sessiont *s, int flag)
 	if (flag == 1)
 	{
 		p->log(2, 0, 0, s->tunnel, "Garden user %s (%s)\n", s->user, p->inet_toa(htonl(s->ip)));
-		snprintf(cmd, 2048, "iptables -t nat -A garden_users -s %s -j garden", p->inet_toa(htonl(s->ip)));
+		snprintf(cmd, sizeof(cmd), "iptables -t nat -A garden_users -s %s -j garden", p->inet_toa(htonl(s->ip)));
 		p->log(3, 0, 0, s->tunnel, "%s\n", cmd);
 		system(cmd);
 		s->walled_garden = 1;
@@ -164,7 +172,7 @@ int garden_session(sessiont *s, int flag)
 		s->cin = s->cout = 0;
 		s->pin = s->pout = 0;
 
-		snprintf(cmd, 2048, "iptables -t nat -D garden_users -s %s -j garden", p->inet_toa(htonl(s->ip)));
+		snprintf(cmd, sizeof(cmd), "iptables -t nat -D garden_users -s %s -j garden", p->inet_toa(htonl(s->ip)));
 		p->log(3, 0, 0, s->tunnel, "%s\n", cmd);
 		while (--count)
 		{