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[l2tpns.git] / garden.c

diff --git a/garden.c b/garden.c
index 7477089..b0abf21 100644 (file)
--- a/garden.c
+++ b/garden.c
@@ -7,18 +7,21 @@
 #include "plugin.h"
 #include "control.h"
 
+char const *cvs_id = "$Id: garden.c,v 1.9 2004-11-03 13:23:58 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 +31,10 @@ 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,
 };
 
@@ -39,7 +45,7 @@ int plugin_post_auth(struct param_post_auth *data)
        // Ignore if user authentication was successful
        if (data->auth_allowed) return PLUGIN_RET_OK;
 
-       p->log(3, 0, 0, 0, "Walled Garden allowing login\n");
+       p->_log(3, 0, 0, 0, "Walled Garden allowing login\n");
        data->auth_allowed = 1;
        data->s->walled_garden = 1;
        return PLUGIN_RET_OK;
@@ -94,7 +100,7 @@ int plugin_control(struct param_control *data)
                sprintf((data->response + data->response_length), "%s", errormsg);
                data->response_length += strlen(errormsg) + 1;
 
-               p->log(3, 0, 0, 0, "Unknown session %d\n", session);
+               p->_log(3, 0, 0, 0, "Unknown session %d\n", session);
                return PLUGIN_RET_STOP;
        }
        *(short *)(data->response + 2) = ntohs(PKT_RESP_OK);
@@ -117,7 +123,7 @@ int plugin_become_master(void)
 
        for (i = 0; up_commands[i] && *up_commands[i]; i++)
        {
-               p->log(3, 0, 0, 0, "Running %s\n", up_commands[i]);
+               p->_log(3, 0, 0, 0, "Running %s\n", up_commands[i]);
                system(up_commands[i]);
        }
 
@@ -142,9 +148,9 @@ 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)));
-               p->log(3, 0, 0, s->tunnel, "%s\n", cmd);
+               p->_log(2, 0, 0, s->tunnel, "Garden user %s (%s)\n", s->user, 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;
        }
@@ -154,7 +160,7 @@ int garden_session(sessiont *s, int flag)
                int count = 40;
 
                // Normal User
-               p->log(2, 0, 0, s->tunnel, "Un-Garden user %s (%s)\n", s->user, p->inet_toa(htonl(s->ip)));
+               p->_log(2, 0, 0, s->tunnel, "Un-Garden user %s (%s)\n", s->user, p->inet_toa(htonl(s->ip)));
                // Kick off any duplicate usernames
                // but make sure not to kick off ourself
                if (s->ip && !s->die && (other = p->get_session_by_username(s->user)) && s != p->get_session_by_id(other)) {
@@ -164,8 +170,8 @@ 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)));
-               p->log(3, 0, 0, s->tunnel, "%s\n", cmd);
+               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)
                {
                        int status = system(cmd);
@@ -209,7 +215,7 @@ int plugin_init(struct pluginfuncs *funcs)
                int i;
                for (i = 0; down_commands[i] && *down_commands[i]; i++)
                {
-                       p->log(3, 0, 0, 0, "Running %s\n", down_commands[i]);
+                       p->_log(3, 0, 0, 0, "Running %s\n", down_commands[i]);
                        system(down_commands[i]);
                }
        }
@@ -226,7 +232,7 @@ void plugin_done()
 
        for (i = 0; down_commands[i] && *down_commands[i]; i++)
        {
-               p->log(3, 0, 0, 0, "Running %s\n", down_commands[i]);
+               p->_log(3, 0, 0, 0, "Running %s\n", down_commands[i]);
                system(down_commands[i]);
        }
 }