handle routing properly in lone-master case

[l2tpns.git] / garden.c

diff --git a/garden.c b/garden.c
index 7477089..fb1f9f8 100644 (file)
--- a/garden.c
+++ b/garden.c
@@ -7,18 +7,23 @@
 #include "plugin.h"
 #include "control.h"
 
+/* walled garden */
+
+char const *cvs_id = "$Id: garden.c,v 1.11 2004-11-05 04:55:27 bodea Exp $";
+
 int __plugin_api_version = 1;
 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)
                {