#include "plugin.h"
#include "control.h"
-int __plugin_api_version = 1;
+/* walled garden */
+
+char const *cvs_id = "$Id: garden.c,v 1.20 2004/12/16 08:49:53 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=512000 >/dev/null", // lots of entries
NULL,
};
"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,
};
+#define F_UNGARDEN 0
+#define F_GARDEN 1
+#define F_CLEANUP 2
+
int garden_session(sessiont *s, int flag);
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, p->get_id_by_session(data->s), data->s->tunnel, "Walled Garden allowing login\n");
data->auth_allowed = 1;
data->s->walled_garden = 1;
return PLUGIN_RET_OK;
return PLUGIN_RET_OK; // Slaves don't do walled garden processing.
if (data->s->walled_garden)
- garden_session(data->s, 1);
+ garden_session(data->s, F_GARDEN);
return PLUGIN_RET_OK;
}
return PLUGIN_RET_OK; // Slaves don't do walled garden processing.
if (data->s->walled_garden)
- garden_session(data->s, 0);
+ garden_session(data->s, F_CLEANUP);
return PLUGIN_RET_OK;
}
+char *plugin_control_help[] = {
+ " garden USER|SID Put user into the walled garden",
+ " ungarden SID Release session from garden",
+ 0
+};
+
int plugin_control(struct param_control *data)
{
- sessiont *s;
sessionidt session;
+ sessiont *s = 0;
+ int flag;
+ char *end;
- if (!iam_master) // All garden processing happens on the master.
+ if (data->argc < 1)
return PLUGIN_RET_OK;
- if (data->type != PKT_GARDEN && data->type != PKT_UNGARDEN)
- return PLUGIN_RET_OK;
+ if (strcmp(data->argv[0], "garden") && strcmp(data->argv[0], "ungarden"))
+ return PLUGIN_RET_OK; // not for us
- if (!data->data && data->data_length)
- return PLUGIN_RET_OK;
+ if (!iam_master)
+ return PLUGIN_RET_NOTMASTER;
- session = atoi((char*)(data->data));
- if (!session)
- return PLUGIN_RET_OK;
+ flag = data->argv[0][0] == 'g' ? F_GARDEN : F_UNGARDEN;
- data->send_response = 1;
- s = p->get_session_by_id(session);
- if (!s || !s->ip)
+ if (data->argc != 2)
{
- char *errormsg = "Session not connected";
- *(short *)(data->response + 2) = ntohs(PKT_RESP_ERROR);
- sprintf((data->response + data->response_length), "%s", errormsg);
- data->response_length += strlen(errormsg) + 1;
+ data->response = NSCTL_RES_ERR;
+ data->additional = "one argument required: username or session id";
+ return PLUGIN_RET_STOP;
+ }
- p->log(3, 0, 0, 0, "Unknown session %d\n", session);
+ if (!(session = strtol(data->argv[1], &end, 10)) || *end)
+ {
+ if (flag)
+ session = p->get_session_by_username(data->argv[1]);
+ else
+ session = 0; // can't ungarden by username
+ }
+
+ if (session)
+ s = p->get_session_by_id(session);
+
+ if (!s || !s->ip)
+ {
+ data->response = NSCTL_RES_ERR;
+ data->additional = "session not found";
return PLUGIN_RET_STOP;
}
- *(short *)(data->response + 2) = ntohs(PKT_RESP_OK);
- if (!(garden_session(s, (data->type == PKT_GARDEN))))
+ if (s->walled_garden == flag)
{
- char *errormsg = "User not connected";
- *(short *)(data->response + 2) = ntohs(PKT_RESP_ERROR);
- sprintf((data->response + data->response_length), "%s", errormsg);
- data->response_length += strlen(errormsg) + 1;
+ data->response = NSCTL_RES_ERR;
+ data->additional = flag ? "already in walled garden" : "not in walled garden";
+ return PLUGIN_RET_STOP;
}
+ garden_session(s, flag);
+ p->session_changed(session);
+
+ data->response = NSCTL_RES_OK;
+ data->additional = 0;
+
return PLUGIN_RET_STOP;
}
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, "Running %s\n", up_commands[i]);
system(up_commands[i]);
}
}
// Called for each active session after becoming master
-int plugin_new_session_master(sessiont * s)
+int plugin_new_session_master(sessiont *s)
{
if (s->walled_garden)
- garden_session(s, 1);
+ garden_session(s, F_GARDEN);
return PLUGIN_RET_OK;
}
int garden_session(sessiont *s, int flag)
{
char cmd[2048];
+ sessionidt sess;
if (!s) return 0;
if (!s->opened) return 0;
- if (flag == 1)
+ sess = p->get_id_by_session(s);
+ if (flag == F_GARDEN)
{
- 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, sess, s->tunnel, "Garden user %s (%s)\n", s->user, p->fmtaddr(htonl(s->ip), 0));
+ snprintf(cmd, sizeof(cmd), "iptables -t nat -A garden_users -s %s -j garden", p->fmtaddr(htonl(s->ip), 0));
+ p->log(3, sess, s->tunnel, "%s\n", cmd);
system(cmd);
s->walled_garden = 1;
}
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, sess, s->tunnel, "Un-Garden user %s (%s)\n", s->user, p->fmtaddr(htonl(s->ip), 0));
// 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)) {
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->fmtaddr(htonl(s->ip), 0));
+ p->log(3, sess, s->tunnel, "%s\n", cmd);
while (--count)
{
int status = system(cmd);
s->walled_garden = 0;
- if (!s->die) {
+ if (flag != F_CLEANUP)
+ {
/* OK, we're up! */
- u16 r = p->radiusnew(p->get_id_by_session(s));
+ uint16_t r = p->radiusnew(p->get_id_by_session(s));
p->radiussend(r, RADIUSSTART);
}
}
- s->walled_garden = flag;
+
return 1;
}
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, "Running %s\n", down_commands[i]);
system(down_commands[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, "Running %s\n", down_commands[i]);
system(down_commands[i]);
}
}
projects / l2tpns.git / blobdiff