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fix late night typos
[l2tpns.git] / l2tpns.c
diff --git a/l2tpns.c b/l2tpns.c
index 5307009..d9fc20c 100644 (file)
--- a/l2tpns.c
+++ b/l2tpns.c
@@ -4,7 +4,7 @@
 // Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced
 // vim: sw=8 ts=8
 
 // Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced
 // vim: sw=8 ts=8
 
-char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.49 2004-11-16 07:54:32 bodea Exp $";
+char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.52 2004-11-17 15:08:19 bodea Exp $";
 
 #include <arpa/inet.h>
 #include <assert.h>
 
 #include <arpa/inet.h>
 #include <assert.h>
@@ -167,10 +167,10 @@ static void build_chap_response(char *challenge, u8 id, u16 challenge_length, ch
 static void update_config(void);
 static void read_config_file(void);
 static void initplugins(void);
 static void update_config(void);
 static void read_config_file(void);
 static void initplugins(void);
-static void add_plugin(char *plugin_name);
-static void remove_plugin(char *plugin_name);
+static int add_plugin(char *plugin_name);
+static int remove_plugin(char *plugin_name);
 static void plugins_done(void);
 static void plugins_done(void);
-static void processcontrol(u8 * buf, int len, struct sockaddr_in *addr);
+static void processcontrol(u8 * buf, int len, struct sockaddr_in *addr, int alen);
 static tunnelidt new_tunnel(void);
 static int unhide_avp(u8 *avp, tunnelidt t, sessionidt s, u16 length);
 
 static tunnelidt new_tunnel(void);
 static int unhide_avp(u8 *avp, tunnelidt t, sessionidt s, u16 length);
 
@@ -434,8 +434,8 @@ static void initudp(void)
        // Control
        memset(&addr, 0, sizeof(addr));
        addr.sin_family = AF_INET;
        // Control
        memset(&addr, 0, sizeof(addr));
        addr.sin_family = AF_INET;
-       addr.sin_port = htons(1702);
-       controlfd = socket(AF_INET, SOCK_DGRAM, 17);
+       addr.sin_port = htons(NSCTL_PORT);
+       controlfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
        setsockopt(controlfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
        if (bind(controlfd, (void *) &addr, sizeof(addr)) < 0)
        {
        setsockopt(controlfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
        if (bind(controlfd, (void *) &addr, sizeof(addr)) < 0)
        {
@@ -2324,7 +2324,7 @@ static void mainloop(void)
                        }
 
                        if (FD_ISSET(controlfd, &r))
                        }
 
                        if (FD_ISSET(controlfd, &r))
-                               processcontrol(buf, recvfrom(controlfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen), &addr);
+                               processcontrol(buf, recvfrom(controlfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen), &addr, alen);
 
                        if (FD_ISSET(clifd, &r))
                        {
 
                        if (FD_ISSET(clifd, &r))
                        {
@@ -2934,32 +2934,31 @@ int main(int argc, char *argv[])
        {
                switch (i)
                {
        {
                switch (i)
                {
-                       case 'd':
-                               if (fork()) exit(0);
-                               setsid();
-                               freopen("/dev/null", "r", stdin);
-                               freopen("/dev/null", "w", stdout);
-                               freopen("/dev/null", "w", stderr);
-                               break;
-                       case 'v':
-                               optdebug++;
-                               break;
-                       case 'c':
-                               optconfig = optarg;
-                               break;
-                       case 'h':
-                               snprintf(hostname, sizeof(hostname), "%s", optarg);
-                               break;
-                       default:
-                               printf("Args are:\n"
-                                      "\t-d\tDetach from terminal\n"
-                                      "\t-c <file>\tConfig file\n"
-                                      "\t-h <hostname>\tForce hostname\n"
-                                      "\t-a <address>\tUse specific address\n"
-                                      "\t-v\t\tDebug\n");
-
-                               return (0);
-                               break;
+               case 'd':
+                       if (fork()) exit(0);
+                       setsid();
+                       freopen("/dev/null", "r", stdin);
+                       freopen("/dev/null", "w", stdout);
+                       freopen("/dev/null", "w", stderr);
+                       break;
+               case 'v':
+                       optdebug++;
+                       break;
+               case 'c':
+                       optconfig = optarg;
+                       break;
+               case 'h':
+                       snprintf(hostname, sizeof(hostname), "%s", optarg);
+                       break;
+               default:
+                       printf("Args are:\n"
+                              "\t-d\t\tDetach from terminal\n"
+                              "\t-c <file>\tConfig file\n"
+                              "\t-h <hostname>\tForce hostname\n"
+                              "\t-v\t\tDebug\n");
+
+                       return (0);
+                       break;
                }
        }
 
                }
        }
 
@@ -3752,7 +3751,7 @@ static void *getconfig(char *key, enum config_typet type)
        return 0;
 }
 
        return 0;
 }
 
-static void add_plugin(char *plugin_name)
+static int add_plugin(char *plugin_name)
 {
        static struct pluginfuncs funcs = {
                _log,
 {
        static struct pluginfuncs funcs = {
                _log,
@@ -3761,10 +3760,12 @@ static void add_plugin(char *plugin_name)
                sessionbyuser,
                sessiontbysessionidt,
                sessionidtbysessiont,
                sessionbyuser,
                sessiontbysessionidt,
                sessionidtbysessiont,
-               sessionkill,
                radiusnew,
                radiussend,
                getconfig,
                radiusnew,
                radiussend,
                getconfig,
+               sessionkill,
+               throttle_session,
+               cluster_send_session,
        };
 
        void *p = open_plugin(plugin_name, 1);
        };
 
        void *p = open_plugin(plugin_name, 1);
@@ -3774,22 +3775,22 @@ static void add_plugin(char *plugin_name)
        if (!p)
        {
                LOG(1, 0, 0, 0, "   Plugin load failed: %s\n", dlerror());
        if (!p)
        {
                LOG(1, 0, 0, 0, "   Plugin load failed: %s\n", dlerror());
-               return;
+               return -1;
        }
 
        if (ll_contains(loaded_plugins, p))
        {
                dlclose(p);
        }
 
        if (ll_contains(loaded_plugins, p))
        {
                dlclose(p);
-               return;
+               return 0; // already loaded
        }
 
        {
        }
 
        {
-               int *v = dlsym(p, "__plugin_api_version");
+               int *v = dlsym(p, "plugin_api_version");
                if (!v || *v != PLUGIN_API_VERSION)
                {
                        LOG(1, 0, 0, 0, "   Plugin load failed: API version mismatch: %s\n", dlerror());
                        dlclose(p);
                if (!v || *v != PLUGIN_API_VERSION)
                {
                        LOG(1, 0, 0, 0, "   Plugin load failed: API version mismatch: %s\n", dlerror());
                        dlclose(p);
-                       return;
+                       return -1;
                }
        }
 
                }
        }
 
@@ -3799,7 +3800,7 @@ static void add_plugin(char *plugin_name)
                {
                        LOG(1, 0, 0, 0, "   Plugin load failed: plugin_init() returned FALSE: %s\n", dlerror());
                        dlclose(p);
                {
                        LOG(1, 0, 0, 0, "   Plugin load failed: plugin_init() returned FALSE: %s\n", dlerror());
                        dlclose(p);
-                       return;
+                       return -1;
                }
        }
 
                }
        }
 
@@ -3816,6 +3817,7 @@ static void add_plugin(char *plugin_name)
        }
 
        LOG(2, 0, 0, 0, "   Loaded plugin %s\n", plugin_name);
        }
 
        LOG(2, 0, 0, 0, "   Loaded plugin %s\n", plugin_name);
+       return 1;
 }
 
 static void run_plugin_done(void *plugin)
 }
 
 static void run_plugin_done(void *plugin)
@@ -3826,29 +3828,32 @@ static void run_plugin_done(void *plugin)
                donefunc();
 }
 
                donefunc();
 }
 
-static void remove_plugin(char *plugin_name)
+static int remove_plugin(char *plugin_name)
 {
        void *p = open_plugin(plugin_name, 0);
 {
        void *p = open_plugin(plugin_name, 0);
-       int i;
+       int loaded = 0;
 
        if (!p)
 
        if (!p)
-               return;
-
-       for (i = 0; i < max_plugin_functions; i++)
-       {
-               void *x;
-               if (plugin_functions[i] && (x = dlsym(p, plugin_functions[i])))
-                       ll_delete(plugins[i], x);
-       }
+               return -1;
 
        if (ll_contains(loaded_plugins, p))
        {
 
        if (ll_contains(loaded_plugins, p))
        {
+               int i;
+               for (i = 0; i < max_plugin_functions; i++)
+               {
+                       void *x;
+                       if (plugin_functions[i] && (x = dlsym(p, plugin_functions[i])))
+                               ll_delete(plugins[i], x);
+               }
+
                ll_delete(loaded_plugins, p);
                run_plugin_done(p);
                ll_delete(loaded_plugins, p);
                run_plugin_done(p);
+               loaded = 1;
        }
 
        dlclose(p);
        LOG(2, 0, 0, 0, "Removed plugin %s\n", plugin_name);
        }
 
        dlclose(p);
        LOG(2, 0, 0, 0, "Removed plugin %s\n", plugin_name);
+       return loaded;
 }
 
 int run_plugins(int plugin_type, void *data)
 }
 
 int run_plugins(int plugin_type, void *data)
@@ -3876,39 +3881,149 @@ static void plugins_done()
                run_plugin_done(p);
 }
 
                run_plugin_done(p);
 }
 
-static void processcontrol(u8 * buf, int len, struct sockaddr_in *addr)
+static void processcontrol(u8 * buf, int len, struct sockaddr_in *addr, int alen)
 {
 {
-       char *resp;
-       int l;
-       struct param_control param = { buf, len, ntohl(addr->sin_addr.s_addr), ntohs(addr->sin_port), NULL, 0, 0 };
-
+       struct nsctl request;
+       struct nsctl response;
+       int type = unpack_control(&request, buf, len);
+       int r;
+       void *p;
 
        if (log_stream && config->debug >= 4)
        {
 
        if (log_stream && config->debug >= 4)
        {
-               LOG(4, ntohl(addr->sin_addr.s_addr), 0, 0, "Received ");
-               dump_packet(buf, log_stream);
+               if (type < 0)
+               {
+                       LOG(4, ntohl(addr->sin_addr.s_addr), 0, 0, "Bogus control message (%d)\n", type);
+               }
+               else
+               {
+                       LOG(4, ntohl(addr->sin_addr.s_addr), 0, 0, "Received ");
+                       dump_control(&request, log_stream);
+               }
        }
 
        }
 
-       resp = calloc(1400, 1);
-       l = new_packet(PKT_RESP_ERROR, resp);
-       *(int *)(resp + 6) = *(int *)(buf + 6);
+       switch (type)
+       {
+       case NSCTL_REQ_LOAD:
+               if (request.argc != 1)
+               {
+                       response.type = NSCTL_RES_ERR;
+                       response.argc = 1;
+                       response.argv[0] = "name of plugin required";
+               }
+               else if ((r = add_plugin(request.argv[0])) < 1)
+               {
+                       response.type = NSCTL_RES_ERR;
+                       response.argc = 1;
+                       response.argv[0] = !r
+                               ? "plugin already loaded"
+                               : "error loading plugin";
+               }
+               else
+               {
+                       response.type = NSCTL_RES_OK;
+                       response.argc = 0;
+               }
+
+               break;
+
+       case NSCTL_REQ_UNLOAD:
+               if (request.argc != 1)
+               {
+                       response.type = NSCTL_RES_ERR;
+                       response.argc = 1;
+                       response.argv[0] = "name of plugin required";
+               }
+               else if ((r = remove_plugin(request.argv[0])) < 1)
+               {
+                       response.type = NSCTL_RES_ERR;
+                       response.argc = 1;
+                       response.argv[0] = !r
+                               ? "plugin not loaded"
+                               : "plugin not found";
+               }
+               else
+               {
+                       response.type = NSCTL_RES_OK;
+                       response.argc = 0;
+               }
+
+               break;
+
+       case NSCTL_REQ_HELP:
+               response.type = NSCTL_RES_OK;
+               response.argc = 0;
 
 
-       param.type = ntohs(*(short *)(buf + 2));
-       param.id = ntohl(*(int *)(buf + 6));
-       param.data_length = ntohs(*(short *)(buf + 4)) - 10;
-       param.data = (param.data_length > 0) ? (char *)(buf + 10) : NULL;
-       param.response = resp;
-       param.response_length = l;
+               ll_reset(loaded_plugins);
+               while ((p = ll_next(loaded_plugins)))
+               {
+                       char **help = dlsym(p, "plugin_control_help");
+                       while (response.argc < 0xff && help && *help)
+                               response.argv[response.argc++] = *help++;
+               }
 
 
-       run_plugins(PLUGIN_CONTROL, &param);
+               break;
 
 
-       if (param.send_response)
+       case NSCTL_REQ_CONTROL:
+               {
+                       struct param_control param = { request.argc, request.argv, 0, NULL };
+                       if (!run_plugins(PLUGIN_CONTROL, &param))
+                       {
+                               response.type = NSCTL_RES_ERR;
+                               response.argc = 1;
+                               response.argv[0] = param.additional
+                                       ? param.additional
+                                       : "error returned by plugin";
+                       }
+                       else if (!(param.response & NSCTL_RESPONSE))
+                       {
+                               response.type = NSCTL_RES_ERR;
+                               response.argc = 1;
+                               response.argv[0] = param.response
+                                       ? "unrecognised response value from plugin"
+                                       : "unhandled action";
+                       }
+                       else
+                       {
+                               response.type = param.response;
+                               response.argc = 0;
+                               if (param.additional)
+                               {
+                                       response.argc = 1;
+                                       response.argv[0] = param.additional;
+                               }
+                       }
+               }
+
+               break;
+
+       default:
+               response.type = NSCTL_RES_ERR;
+               response.argc = 1;
+               response.argv[0] = "error unpacking control packet";
+       }
+
+       buf = calloc(NSCTL_MAX_PKT_SZ, 1);
+       if (!buf)
        {
        {
-               send_packet(controlfd, ntohl(addr->sin_addr.s_addr), ntohs(addr->sin_port), param.response, param.response_length);
-               LOG(4, ntohl(addr->sin_addr.s_addr), 0, 0, "Sent Control packet response\n");
+               LOG(2, ntohl(addr->sin_addr.s_addr), 0, 0, "Failed to allocate nsctl response\n");
+               return;
        }
 
        }
 
-       free(resp);
+       r = pack_control(buf, NSCTL_MAX_PKT_SZ, response.type, response.argc, response.argv);
+       if (r > 0)
+       {
+               sendto(controlfd, buf, r, 0, (const struct sockaddr *) addr, alen);
+               if (log_stream && config->debug >= 4)
+               {
+                       LOG(4, ntohl(addr->sin_addr.s_addr), 0, 0, "Sent ");
+                       dump_control(&response, log_stream);
+               }
+       }
+       else
+               LOG(2, ntohl(addr->sin_addr.s_addr), 0, 0, "Failed to pack nsctl response (%d)\n", r);
+
+       free(buf);
 }
 
 static tunnelidt new_tunnel()
 }
 
 static tunnelidt new_tunnel()
for cloning use: "git clone git://git.sameswireless.fr/l2tpns.git" ; For add to your sources.list: "deb http://package.sameswifi.fr/ jessie main"