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allow DNS servers to be specified using either old or new vendor-specific Ascend...
[l2tpns.git] / garden.c
diff --git a/garden.c b/garden.c
index 059a001..44b9597 100644 (file)
--- a/garden.c
+++ b/garden.c
@@ -9,258 +9,289 @@
 
 /* walled garden */
 
 
 /* walled garden */
 
-char const *cvs_id = "$Id: garden.c,v 1.16 2004/11/18 06:41:03 bodea Exp $";
+char const *cvs_id = "$Id: garden.c,v 1.25 2006/02/23 01:07:23 bodea Exp $";
 
 int plugin_api_version = PLUGIN_API_VERSION;
 
 int plugin_api_version = PLUGIN_API_VERSION;
-static struct pluginfuncs *p = 0;
+static struct pluginfuncs *f = 0;
 
 static int iam_master = 0;     // We're all slaves! Slaves I tell you!
 
 char *up_commands[] = {
 
 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 -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
-       "iptables -t nat -F garden_users",
-       "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,
+    "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
+    "iptables -t nat -F garden_users",
+    "iptables -t nat -A PREROUTING -j garden_users",           // DNAT any users on the garden_users chain
+    "sysctl -w net.ipv4.netfilter.ip_conntrack_max=512000"     // lots of entries
+            " net.ipv4.netfilter.ip_conntrack_tcp_timeout_established=18000 >/dev/null", // 5hrs
+    NULL,
 };
 
 char *down_commands[] = {
 };
 
 char *down_commands[] = {
-       "iptables -t nat -F PREROUTING",
-       "iptables -t nat -F garden_users",
-       "iptables -t nat -X garden_users",
-       "iptables -t nat -F garden",
-       "iptables -t nat -X garden",
-       "rmmod iptable_nat",    // Should also remove ip_conntrack, but
+    "iptables -t nat -F PREROUTING",
+    "iptables -t nat -F garden_users",
+    "iptables -t nat -X garden_users",
+    "iptables -t nat -F garden",
+    "iptables -t nat -X garden",
+    "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.
                                // doing so can take hours...  literally.
                                // If a master is re-started as a slave,
                                // either rmmod manually, or reboot.
-       NULL,
+    NULL,
 };
 
 };
 
-int garden_session(sessiont *s, int flag);
+#define F_UNGARDEN     0
+#define F_GARDEN       1
+#define F_CLEANUP      2
+
+int garden_session(sessiont *s, int flag, char *newuser);
 
 int plugin_post_auth(struct param_post_auth *data)
 {
 
 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");
-       data->auth_allowed = 1;
-       data->s->walled_garden = 1;
+    // Ignore if user authentication was successful
+    if (data->auth_allowed)
        return PLUGIN_RET_OK;
        return PLUGIN_RET_OK;
+
+    f->log(3, f->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;
 }
 
 int plugin_new_session(struct param_new_session *data)
 {
 }
 
 int plugin_new_session(struct param_new_session *data)
 {
-       if (!iam_master)
-               return PLUGIN_RET_OK;   // Slaves don't do walled garden processing.
+    if (!iam_master)
+       return PLUGIN_RET_OK;   // Slaves don't do walled garden processing.
 
 
-       if (data->s->walled_garden)
-               garden_session(data->s, 1);
+    if (data->s->walled_garden)
+       garden_session(data->s, F_GARDEN, 0);
 
 
-       return PLUGIN_RET_OK;
+    return PLUGIN_RET_OK;
 }
 
 int plugin_kill_session(struct param_new_session *data)
 {
 }
 
 int plugin_kill_session(struct param_new_session *data)
 {
-       if (!iam_master)
-               return PLUGIN_RET_OK;   // Slaves don't do walled garden processing.
+    if (!iam_master)
+       return PLUGIN_RET_OK;   // Slaves don't do walled garden processing.
 
 
-       if (data->s->walled_garden)
-               garden_session(data->s, 0);
+    if (data->s->walled_garden)
+       garden_session(data->s, F_CLEANUP, 0);
 
 
-       return PLUGIN_RET_OK;
+    return PLUGIN_RET_OK;
 }
 
 char *plugin_control_help[] = {
 }
 
 char *plugin_control_help[] = {
-       "  garden USER|SID                             Put user into the walled garden",
-       "  ungarden SID                                Release session from garden",
-       0
+    "  garden USER|SID                             Put user into the walled garden",
+    "  ungarden SID [USER]                         Release session from garden",
+    0
 };
 
 int plugin_control(struct param_control *data)
 {
 };
 
 int plugin_control(struct param_control *data)
 {
-       sessionidt session;
-       sessiont *s = 0;
-       int flag;
-       char *end;
+    sessionidt session;
+    sessiont *s = 0;
+    int flag;
+    char *end;
 
 
-       if (data->argc < 1)
-               return PLUGIN_RET_OK;
+    if (data->argc < 1)
+       return PLUGIN_RET_OK;
 
 
-       if (strcmp(data->argv[0], "garden") && strcmp(data->argv[0], "ungarden"))
-               return PLUGIN_RET_OK; // not for us
+    if (strcmp(data->argv[0], "garden") && strcmp(data->argv[0], "ungarden"))
+       return PLUGIN_RET_OK; // not for us
 
 
-       if (!iam_master)
-               return PLUGIN_RET_NOTMASTER;
+    if (!iam_master)
+       return PLUGIN_RET_NOTMASTER;
 
 
-       flag = data->argv[0][0] != 'u';
+    flag = data->argv[0][0] == 'g' ? F_GARDEN : F_UNGARDEN;
 
 
-       if (data->argc != 2)
-       {
-               data->response = NSCTL_RES_ERR;
-               data->additional = "one argument required: username or session id";
-               return PLUGIN_RET_STOP;
-       }
+    if (data->argc < 2 || data->argc > 3 || (data->argc > 2 && flag == F_GARDEN))
+    {
+       data->response = NSCTL_RES_ERR;
+       data->additional = flag == F_GARDEN
+           ? "requires username or session id"
+           : "requires session id and optional username";
 
 
-       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
-       }
+       return PLUGIN_RET_STOP;
+    }
 
 
-       if (session)
-               s = p->get_session_by_id(session);
+    if (!(session = strtol(data->argv[1], &end, 10)) || *end)
+    {
+       if (flag)
+           session = f->get_session_by_username(data->argv[1]);
+       else
+           session = 0; // can't ungarden by username
+    }
 
 
-       if (!s || !s->ip)
-       {
-               data->response = NSCTL_RES_ERR;
-               data->additional = "session not found";
-               return PLUGIN_RET_STOP;
-       }
+    if (session)
+       s = f->get_session_by_id(session);
 
 
-       if (s->walled_garden == flag)
-       {
-               data->response = NSCTL_RES_ERR;
-               data->additional = flag ? "already in walled garden" : "not in walled garden";
-               return PLUGIN_RET_STOP;
-       }
+    if (!s || !s->ip)
+    {
+       data->response = NSCTL_RES_ERR;
+       data->additional = "session not found";
+       return PLUGIN_RET_STOP;
+    }
 
 
-       garden_session(s, flag);
-       p->session_changed(session);
+    if (s->walled_garden == flag)
+    {
+       data->response = NSCTL_RES_ERR;
+       data->additional = flag ? "already in walled garden" : "not in walled garden";
+       return PLUGIN_RET_STOP;
+    }
 
 
-       data->response = NSCTL_RES_OK;
-       data->additional = 0;
+    garden_session(s, flag, data->argc > 2 ? data->argv[2] : 0);
+    f->session_changed(session);
 
 
-       return PLUGIN_RET_STOP;
+    data->response = NSCTL_RES_OK;
+    data->additional = 0;
+
+    return PLUGIN_RET_STOP;
 }
 
 int plugin_become_master(void)
 {
 }
 
 int plugin_become_master(void)
 {
-       int i;
-       iam_master = 1; // We just became the master. Wow!
+    int i;
+    iam_master = 1;    // We just became the master. Wow!
 
 
-       for (i = 0; up_commands[i] && *up_commands[i]; i++)
-       {
-               p->log(3, 0, 0, 0, "Running %s\n", up_commands[i]);
-               system(up_commands[i]);
-       }
+    for (i = 0; up_commands[i] && *up_commands[i]; i++)
+    {
+       f->log(3, 0, 0, "Running %s\n", up_commands[i]);
+       system(up_commands[i]);
+    }
 
 
-       return PLUGIN_RET_OK;
+    return PLUGIN_RET_OK;
 }
 
 // Called for each active session after becoming master
 int plugin_new_session_master(sessiont *s)
 {      
 }
 
 // Called for each active session after becoming master
 int plugin_new_session_master(sessiont *s)
 {      
-       if (s->walled_garden)
-       {
-               s->walled_garden = 0;
-               garden_session(s, 1);
-       }
+    if (s->walled_garden)
+       garden_session(s, F_GARDEN, 0);
 
 
-       return PLUGIN_RET_OK;
+    return PLUGIN_RET_OK;
 }
 
 }
 
-int garden_session(sessiont *s, int flag)
+int garden_session(sessiont *s, int flag, char *newuser)
 {
 {
-       char cmd[2048];
+    char cmd[2048];
+    sessionidt sess;
+
+    if (!s) return 0;
+    if (!s->opened) return 0;
+
+    sess = f->get_id_by_session(s);
+    if (flag == F_GARDEN)
+    {
+       f->log(2, sess, s->tunnel, "Garden user %s (%s)\n", s->user,
+           f->fmtaddr(htonl(s->ip), 0));
+
+       snprintf(cmd, sizeof(cmd),
+           "iptables -t nat -A garden_users -s %s -j garden",
+           f->fmtaddr(htonl(s->ip), 0));
+
+       f->log(3, sess, s->tunnel, "%s\n", cmd);
+       system(cmd);
+       s->walled_garden = 1;
+    }
+    else
+    {
+       sessionidt other;
+       int count = 40;
+
+       // Normal User
+       f->log(2, sess, s->tunnel, "Un-Garden user %s (%s)\n", s->user, f->fmtaddr(htonl(s->ip), 0));
+       if (newuser)
+       {
+           snprintf(s->user, MAXUSER, "%s", newuser);
+           f->log(2, sess, s->tunnel, "  Setting username to %s\n", s->user);
+       }
+
+       // Kick off any duplicate usernames
+       // but make sure not to kick off ourself
+       if (s->ip && !s->die && (other = f->get_session_by_username(s->user)) &&
+           s != f->get_session_by_id(other))
+       {
+           f->sessionkill(other,
+               "Duplicate session when user released from walled garden");
+       }
+
+       /* Clean up counters */
+       s->pin = s->pout = 0;
+       s->cin = s->cout = 0;
+       s->cin_delta = s->cout_delta = 0;
+       s->cin_wrap = s->cout_wrap = 0;
 
 
-       if (!s) return 0;
-       if (!s->opened) return 0;
+       snprintf(cmd, sizeof(cmd),
+           "iptables -t nat -D garden_users -s %s -j garden",
+           f->fmtaddr(htonl(s->ip), 0));
 
 
-       if (flag == 1)
+       f->log(3, sess, s->tunnel, "%s\n", cmd);
+       while (--count)
        {
        {
-               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;
+           int status = system(cmd);
+           if (WEXITSTATUS(status) != 0) break;
        }
        }
-       else
+
+       s->walled_garden = 0;
+
+       if (flag != F_CLEANUP)
        {
        {
-               sessionidt other;
-               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)));
-               // 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)) {
-                       p->sessionkill(other, "Duplicate session when user released from walled garden");
-               }
-               /* Clean up counters */
-               s->cin = s->cout = 0;
-               s->pin = s->pout = 0;
-
-               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);
-                       if (WEXITSTATUS(status) != 0) break;
-               }
-
-               s->walled_garden = 0;
-
-               if (!s->die) {
-                       /* OK, we're up! */
-                       u16 r = p->radiusnew(p->get_id_by_session(s));
-                       p->radiussend(r, RADIUSSTART);
-               }
+           /* OK, we're up! */
+           uint16_t r = f->radiusnew(f->get_id_by_session(s));
+           if (r) f->radiussend(r, RADIUSSTART);
        }
        }
-       s->walled_garden = flag;
-       return 1;
+    }
+
+    return 1;
 }
 
 int plugin_init(struct pluginfuncs *funcs)
 {
 }
 
 int plugin_init(struct pluginfuncs *funcs)
 {
-       FILE *tables;
-       int found_nat = 0;
+    FILE *tables;
+    int found_nat = 0;
 
 
-       if (!funcs)
-               return 0;
+    if (!funcs)
+       return 0;
 
 
-       p = funcs;
+    f = funcs;
 
 
-       if ((tables = fopen("/proc/net/ip_tables_names", "r")))
-       {
-               char buf[1024];
-               while (fgets(buf, sizeof(buf), tables) && !found_nat)
-                       found_nat = !strcmp(buf, "nat\n");
+    if ((tables = fopen("/proc/net/ip_tables_names", "r")))
+    {
+       char buf[1024];
+       while (fgets(buf, sizeof(buf), tables) && !found_nat)
+           found_nat = !strcmp(buf, "nat\n");
 
 
-               fclose(tables);
-       }
+       fclose(tables);
+    }
 
 
-       /* master killed/crashed? */
-       if (found_nat)
+    /* master killed/crashed? */
+    if (found_nat)
+    {
+       int i;
+       for (i = 0; down_commands[i] && *down_commands[i]; i++)
        {
        {
-               int i;
-               for (i = 0; down_commands[i] && *down_commands[i]; i++)
-               {
-                       p->log(3, 0, 0, 0, "Running %s\n", down_commands[i]);
-                       system(down_commands[i]);
-               }
+           f->log(3, 0, 0, "Running %s\n", down_commands[i]);
+           system(down_commands[i]);
        }
        }
+    }
 
 
-       return 1;
+    return 1;
 }
 
 void plugin_done()
 {
 }
 
 void plugin_done()
 {
-       int i;
+    int i;
 
 
-       if (!iam_master)        // Never became master. nothing to do.
-               return;
+    if (!iam_master)   // Never became master. nothing to do.
+       return;
 
 
-       for (i = 0; down_commands[i] && *down_commands[i]; i++)
-       {
-               p->log(3, 0, 0, 0, "Running %s\n", down_commands[i]);
-               system(down_commands[i]);
-       }
+    for (i = 0; down_commands[i] && *down_commands[i]; i++)
+    {
+       f->log(3, 0, 0, "Running %s\n", down_commands[i]);
+       system(down_commands[i]);
+    }
 }
 
 }
 
for cloning use: "git clone git://git.sameswireless.fr/l2tpns.git" ; For add to your sources.list: "deb http://package.sameswifi.fr/ jessie main"