cli.c

   1 // L2TPNS Command Line Interface
   2 // vim: sw=4 ts=8
   3
   4 char const *cvs_name = "$Name:  $";
   5 char const *cvs_id_cli = "$Id: cli.c,v 1.10 2004-07-11 07:57:33 bodea Exp $";
   6
   7 #include <stdio.h>
   8 #include <stdarg.h>
   9 #include <sys/file.h>
  10 #include <sys/stat.h>
  11 #include <syslog.h>
  12 #include <malloc.h>
  13 #include <sched.h>
  14 #include <string.h>
  15 #include <ctype.h>
  16 #include <stdlib.h>
  17 #include <time.h>
  18 #include <arpa/inet.h>
  19 #include <errno.h>
  20 #include <sys/socket.h>
  21 #include <sys/types.h>
  22 #include <signal.h>
  23 #include <unistd.h>
  24 #include <dlfcn.h>
  25 #include <libcli.h>
  26 #include "l2tpns.h"
  27 #include "util.h"
  28 #include "cluster.h"
  29 #include "tbf.h"
  30 #include "ll.h"
  31 #ifdef BGP
  32 #include "bgp.h"
  33 #endif
  34
  35 extern tunnelt *tunnel;
  36 extern sessiont *session;
  37 extern radiust *radius;
  38 extern ippoolt *ip_address_pool;
  39 extern struct Tstats *_statistics;
  40 struct cli_def *cli = NULL;
  41 int cli_quit = 0;
  42 extern int clifd, udpfd, tunfd, snoopfd, ifrfd, cluster_sockfd;
  43 extern int *radfds;
  44 extern struct configt *config;
  45 extern struct config_descriptt config_values[];
  46 #ifdef RINGBUFFER
  47 extern struct Tringbuffer *ringbuffer;
  48 #endif
  49 extern struct cli_session_actions *cli_session_actions;
  50 extern struct cli_tunnel_actions *cli_tunnel_actions;
  51
  52 char *debug_levels[] = {
  53     "CRIT",
  54     "ERROR",
  55     "WARN",
  56     "INFO",
  57     "CALL",
  58     "DATA",
  59 };
  60
  61 struct
  62 {
  63     char critical;
  64     char error;
  65     char warning;
  66     char info;
  67     char calls;
  68     char data;
  69 } debug_flags;
  70
  71 int debug_session;
  72 int debug_tunnel;
  73 int debug_rb_tail;
  74 FILE *save_config_fh;
  75
  76 int cmd_show_session(struct cli_def *cli, char *command, char **argv, int argc);
  77 int cmd_show_tunnels(struct cli_def *cli, char *command, char **argv, int argc);
  78 int cmd_show_users(struct cli_def *cli, char *command, char **argv, int argc);
  79 int cmd_show_radius(struct cli_def *cli, char *command, char **argv, int argc);
  80 int cmd_show_counters(struct cli_def *cli, char *command, char **argv, int argc);
  81 int cmd_show_version(struct cli_def *cli, char *command, char **argv, int argc);
  82 int cmd_show_pool(struct cli_def *cli, char *command, char **argv, int argc);
  83 int cmd_show_run(struct cli_def *cli, char *command, char **argv, int argc);
  84 int cmd_show_banana(struct cli_def *cli, char *command, char **argv, int argc);
  85 int cmd_show_plugins(struct cli_def *cli, char *command, char **argv, int argc);
  86 int cmd_show_throttle(struct cli_def *cli, char *command, char **argv, int argc);
  87 int cmd_show_cluster(struct cli_def *cli, char *command, char **argv, int argc);
  88 int cmd_write_memory(struct cli_def *cli, char *command, char **argv, int argc);
  89 int cmd_clear_counters(struct cli_def *cli, char *command, char **argv, int argc);
  90 int cmd_drop_user(struct cli_def *cli, char *command, char **argv, int argc);
  91 int cmd_drop_tunnel(struct cli_def *cli, char *command, char **argv, int argc);
  92 int cmd_drop_session(struct cli_def *cli, char *command, char **argv, int argc);
  93 int cmd_snoop(struct cli_def *cli, char *command, char **argv, int argc);
  94 int cmd_no_snoop(struct cli_def *cli, char *command, char **argv, int argc);
  95 int cmd_throttle(struct cli_def *cli, char *command, char **argv, int argc);
  96 int cmd_no_throttle(struct cli_def *cli, char *command, char **argv, int argc);
  97 int cmd_debug(struct cli_def *cli, char *command, char **argv, int argc);
  98 int cmd_no_debug(struct cli_def *cli, char *command, char **argv, int argc);
  99 int cmd_set(struct cli_def *cli, char *command, char **argv, int argc);
 100 int cmd_load_plugin(struct cli_def *cli, char *command, char **argv, int argc);
 101 int cmd_remove_plugin(struct cli_def *cli, char *command, char **argv, int argc);
 102 int cmd_uptime(struct cli_def *cli, char *command, char **argv, int argc);
 103 int regular_stuff(struct cli_def *cli);
 104
 105 void init_cli(char *hostname)
 106 {
 107     FILE *f;
 108     char buf[4096];
 109     struct cli_command *c;
 110     struct cli_command *c2;
 111     int on = 1;
 112     struct sockaddr_in addr;
 113
 114     cli = cli_init();
 115     if (hostname && *hostname)
 116         cli_set_hostname(cli, hostname);
 117     else
 118         cli_set_hostname(cli, "l2tpns");
 119
 120     c = cli_register_command(cli, NULL, "show", NULL, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, NULL);
 121     cli_register_command(cli, c, "banana", cmd_show_banana, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "Show a banana");
 122 #ifdef BGP
 123     cli_register_command(cli, c, "bgp", cmd_show_bgp, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "Show BGP status");
 124 #endif /* BGP */
 125     cli_register_command(cli, c, "cluster", cmd_show_cluster, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "Show cluster information");
 126     cli_register_command(cli, c, "ipcache", cmd_show_ipcache, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "Show contents of the IP cache");
 127     cli_register_command(cli, c, "plugins", cmd_show_plugins, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "List all installed plugins");
 128     cli_register_command(cli, c, "pool", cmd_show_pool, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "Show the IP address allocation pool");
 129     cli_register_command(cli, c, "radius", cmd_show_radius, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "Show active radius queries");
 130     cli_register_command(cli, c, "running-config", cmd_show_run, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "Show the currently running configuration");
 131     cli_register_command(cli, c, "session", cmd_show_session, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "Show a list of sessions or details for a single session");
 132     cli_register_command(cli, c, "tbf", cmd_show_tbf, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "List all token bucket filters in use");
 133     cli_register_command(cli, c, "throttle", cmd_show_throttle, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "List all throttled sessions and associated TBFs");
 134     cli_register_command(cli, c, "tunnels", cmd_show_tunnels, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "Show a list of tunnels or details for a single tunnel");
 135     cli_register_command(cli, c, "users", cmd_show_users, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "Show a list of all connected users or details of selected user");
 136     cli_register_command(cli, c, "version", cmd_show_version, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "Show currently running software version");
 137
 138     c2 = cli_register_command(cli, c, "histogram", NULL, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, NULL);
 139     cli_register_command(cli, c2, "idle", cmd_show_hist_idle, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "Show histogram of session idle times");
 140     cli_register_command(cli, c2, "open", cmd_show_hist_open, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "Show histogram of session durations");
 141
 142 #ifdef STATISTICS
 143     cli_register_command(cli, c, "counters", cmd_show_counters, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "Display all the internal counters and running totals");
 144
 145     c = cli_register_command(cli, NULL, "clear", NULL, PRIVILEGE_PRIVILEGED, MODE_EXEC, NULL);
 146     cli_register_command(cli, c, "counters", cmd_clear_counters, PRIVILEGE_PRIVILEGED, MODE_EXEC, "Clear internal counters");
 147 #endif
 148
 149     cli_register_command(cli, NULL, "uptime", cmd_uptime, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "Show uptime and bandwidth utilisation");
 150
 151     c = cli_register_command(cli, NULL, "write", NULL, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, NULL);
 152     cli_register_command(cli, c, "memory", cmd_write_memory, PRIVILEGE_PRIVILEGED, MODE_EXEC, "Save the running config to flash");
 153     cli_register_command(cli, c, "terminal", cmd_show_run, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "Show the running config");
 154
 155     cli_register_command(cli, NULL, "snoop", cmd_snoop, PRIVILEGE_PRIVILEGED, MODE_EXEC, "Temporarily enable interception for a user");
 156     cli_register_command(cli, NULL, "throttle", cmd_throttle, PRIVILEGE_PRIVILEGED, MODE_EXEC, "Temporarily enable throttling for a user");
 157     cli_register_command(cli, NULL, "debug", cmd_debug, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "Set the level of logging that is shown on the console");
 158
 159     c = cli_register_command(cli, NULL, "suspend", NULL, PRIVILEGE_PRIVILEGED, MODE_EXEC, NULL);
 160     cli_register_command(cli, c, "bgp", cmd_suspend_bgp, PRIVILEGE_PRIVILEGED, MODE_EXEC, "Withdraw routes from BGP peer");
 161
 162     c = cli_register_command(cli, NULL, "no", NULL, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, NULL);
 163     cli_register_command(cli, c, "snoop", cmd_no_snoop, PRIVILEGE_PRIVILEGED, MODE_EXEC, "Temporarily disable interception for a user");
 164     cli_register_command(cli, c, "throttle", cmd_no_throttle, PRIVILEGE_PRIVILEGED, MODE_EXEC, "Temporarily disable throttling for a user");
 165     cli_register_command(cli, c, "debug", cmd_no_debug, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, "Turn off logging of a certain level of debugging");
 166     c2 = cli_register_command(cli, c, "suspend", NULL, PRIVILEGE_PRIVILEGED, MODE_EXEC, NULL);
 167     cli_register_command(cli, c2, "bgp", cmd_no_suspend_bgp, PRIVILEGE_PRIVILEGED, MODE_EXEC, "Advertise routes to BGP peer");
 168
 169     c = cli_register_command(cli, NULL, "drop", NULL, PRIVILEGE_PRIVILEGED, MODE_EXEC, NULL);
 170     cli_register_command(cli, c, "user", cmd_drop_user, PRIVILEGE_PRIVILEGED, MODE_EXEC, "Disconnect a user");
 171     cli_register_command(cli, c, "tunnel", cmd_drop_tunnel, PRIVILEGE_PRIVILEGED, MODE_EXEC, "Disconnect a tunnel and all sessions on that tunnel");
 172     cli_register_command(cli, c, "session", cmd_drop_session, PRIVILEGE_PRIVILEGED, MODE_EXEC, "Disconnect a session");
 173
 174     c = cli_register_command(cli, NULL, "restart", NULL, PRIVILEGE_PRIVILEGED, MODE_EXEC, NULL);
 175     cli_register_command(cli, c, "bgp", cmd_restart_bgp, PRIVILEGE_PRIVILEGED, MODE_EXEC, "Restart BGP");
 176
 177     c = cli_register_command(cli, NULL, "load", NULL, PRIVILEGE_PRIVILEGED, MODE_CONFIG, NULL);
 178     cli_register_command(cli, c, "plugin", cmd_load_plugin, PRIVILEGE_PRIVILEGED, MODE_CONFIG, "Load a plugin");
 179
 180     c = cli_register_command(cli, NULL, "remove", NULL, PRIVILEGE_PRIVILEGED, MODE_CONFIG, NULL);
 181     cli_register_command(cli, c, "plugin", cmd_remove_plugin, PRIVILEGE_PRIVILEGED, MODE_CONFIG, "Remove a plugin");
 182
 183     cli_register_command(cli, NULL, "set", cmd_set, PRIVILEGE_PRIVILEGED, MODE_CONFIG, "Set a configuration variable");
 184
 185     // Enable regular processing
 186     cli_regular(cli, regular_stuff);
 187
 188     if (!(f = fopen(CLIUSERS, "r")))
 189     {
 190         log(0, 0, 0, 0, "WARNING! No users specified. Command-line access is open to all\n");
 191     }
 192     else
 193     {
 194         while (fgets(buf, 4096, f))
 195         {
 196             char *p;
 197             if (*buf == '#') continue;
 198             if ((p = strchr(buf, '\r'))) *p = 0;
 199             if ((p = strchr(buf, '\n'))) *p = 0;
 200             if (!*buf) continue;
 201             if (!(p = strchr((char *)buf, ':'))) continue;
 202             *p++ = 0;
 203             if (!strcmp(buf, "enable"))
 204             {
 205                 cli_allow_enable(cli, p);
 206                 log(3, 0, 0, 0, "Setting enable password\n");
 207             }
 208             else
 209             {
 210                 cli_allow_user(cli, buf, p);
 211                 log(3, 0, 0, 0, "Allowing user %s to connect to the CLI\n", buf);
 212             }
 213         }
 214         fclose(f);
 215     }
 216
 217     memset(&addr, 0, sizeof(addr));
 218     clifd = socket(PF_INET, SOCK_STREAM, 6);
 219     setsockopt(clifd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
 220     {
 221         int flags;
 222         // Set cli fd as non-blocking
 223         flags = fcntl(clifd, F_GETFL, 0);
 224         fcntl(clifd, F_SETFL, flags | O_NONBLOCK);
 225     }
 226     addr.sin_family = AF_INET;
 227     addr.sin_port = htons(23);
 228     if (bind(clifd, (void *) &addr, sizeof(addr)) < 0)
 229     {
 230             log(0, 0, 0, 0, "Error listening on cli port 23: %s\n", strerror(errno));
 231             return;
 232     }
 233     listen(clifd, 10);
 234 }
 235
 236 void cli_do(int sockfd)
 237 {
 238     int i;
 239
 240     if (fork()) return;
 241     if (config->scheduler_fifo)
 242     {
 243         int ret;
 244         struct sched_param params = {0};
 245         params.sched_priority = 0;
 246         if ((ret = sched_setscheduler(0, SCHED_OTHER, &params)) == 0)
 247         {
 248             log(3, 0, 0, 0, "Dropped FIFO scheduler\n");
 249         }
 250         else
 251         {
 252             log(0, 0, 0, 0, "Error setting scheduler to OTHER: %s\n", strerror(errno));
 253             log(0, 0, 0, 0, "This is probably really really bad.\n");
 254         }
 255     }
 256
 257     signal(SIGPIPE, SIG_DFL);
 258     signal(SIGCHLD, SIG_DFL);
 259     signal(SIGHUP, SIG_DFL);
 260     signal(SIGUSR1, SIG_DFL);
 261     signal(SIGQUIT, SIG_DFL);
 262     signal(SIGKILL, SIG_DFL);
 263     signal(SIGALRM, SIG_DFL);
 264     signal(SIGTERM, SIG_DFL);
 265
 266     // Close sockets
 267     if (udpfd) close(udpfd); udpfd = 0;
 268     if (tunfd) close(tunfd); tunfd = 0;
 269     if (snoopfd) close(snoopfd); snoopfd = 0;
 270     for (i = 0; i < config->num_radfds; i++)
 271         if (radfds[i]) close(radfds[i]);
 272     if (ifrfd) close(ifrfd); ifrfd = 0;
 273     if (cluster_sockfd) close(cluster_sockfd); cluster_sockfd = 0;
 274     if (clifd) close(clifd); clifd = 0;
 275 #ifdef BGP
 276     for (i = 0; i < BGP_NUM_PEERS; i++)
 277         if (bgp_peers[i].sock != -1)
 278             close(bgp_peers[i].sock);
 279 #endif /* BGP */
 280
 281     {
 282         int require_auth = 1;
 283         struct sockaddr_in addr;
 284         int l = sizeof(addr);
 285         if (getpeername(sockfd, (struct sockaddr *)&addr, &l) == 0)
 286         {
 287             log(3, 0, 0, 0, "Accepted connection to CLI from %s\n", inet_toa(addr.sin_addr.s_addr));
 288             require_auth = addr.sin_addr.s_addr != inet_addr("127.0.0.1");
 289         }
 290         else
 291             log(0, 0, 0, 0, "getpeername() failed on cli socket. Requiring authentication: %s\n", strerror(errno));
 292
 293         if (require_auth)
 294         {
 295             log(3, 0, 0, 0, "CLI is remote, requiring authentication\n");
 296             if (!cli->users) /* paranoia */
 297             {
 298                 log(0, 0, 0, 0, "No users for remote authentication!  Exiting CLI\n");
 299                 exit(0);
 300             }
 301         }
 302         else
 303         {
 304             /* no username/pass required */
 305             cli->users = 0;
 306         }
 307     }
 308
 309     debug_session = 0;
 310     debug_tunnel = 0;
 311 #ifdef RINGBUFFER
 312     debug_rb_tail = ringbuffer->tail;
 313 #endif
 314     memset(&debug_flags, 0, sizeof(debug_flags));
 315     debug_flags.critical = 1;
 316
 317     cli_loop(cli, sockfd);
 318
 319     close(sockfd);
 320     log(3, 0, 0, 0, "Closed CLI connection\n");
 321     exit(0);
 322 }
 323
 324 void cli_print_log(struct cli_def *cli, char *string)
 325 {
 326     log(3, 0, 0, 0, "%s\n", string);
 327 }
 328
 329 void cli_do_file(FILE *fh)
 330 {
 331     log(3, 0, 0, 0, "Reading configuration file\n");
 332     cli_print_callback(cli, cli_print_log);
 333     cli_file(cli, fh, PRIVILEGE_PRIVILEGED, MODE_CONFIG);
 334     cli_print_callback(cli, NULL);
 335 }
 336
 337 int cli_arg_help(struct cli_def *cli, int cr_ok, char *entry, ...)
 338 {
 339     va_list ap;
 340     char *desc;
 341     char buf[16];
 342     char *p;
 343
 344     va_start(ap, entry);
 345     while (entry)
 346     {
 347         /* allow one %d */
 348         if ((p = strchr(entry, '%')) && !strchr(p+1, '%') && p[1] == 'd')
 349         {
 350             int v = va_arg(ap, int);
 351             snprintf(buf, sizeof(buf), entry, v);
 352             p = buf;
 353         }
 354         else
 355             p = entry;
 356
 357         desc = va_arg(ap, char *);
 358         if (desc && *desc)
 359             cli_print(cli, "  %-20s %s", p, desc);
 360         else
 361             cli_print(cli, "  %s", p);
 362
 363         entry = desc ? va_arg(ap, char *) : 0;
 364     }
 365
 366     va_end(ap);
 367     if (cr_ok)
 368         cli_print(cli, "  <cr>");
 369
 370     return CLI_OK;
 371 }
 372
 373 int cmd_show_session(struct cli_def *cli, char *command, char **argv, int argc)
 374 {
 375     int i;
 376
 377     if (CLI_HELP_REQUESTED)
 378         return cli_arg_help(cli, 1,
 379             "<1-%d>", MAXSESSION-1, "Show specific session by id",
 380             NULL);
 381
 382     time(&time_now);
 383     if (argc > 0)
 384     {
 385         // Show individual session
 386         for (i = 0; i < argc; i++)
 387         {
 388             unsigned int s;
 389             s = atoi(argv[i]);
 390             if (s <= 0 || s >= MAXSESSION)
 391             {
 392                 cli_print(cli, "Invalid session id \"%s\"", argv[i]);
 393                 continue;
 394             }
 395             cli_print(cli, "\r\nSession %d:", s);
 396             cli_print(cli, "    User:           %s", session[s].user[0] ? session[s].user : "none");
 397             cli_print(cli, "    Calling Num:    %s", session[s].calling);
 398             cli_print(cli, "    Called Num:     %s", session[s].called);
 399             cli_print(cli, "    Tunnel ID:      %d", session[s].tunnel);
 400             cli_print(cli, "    IP address:     %s", inet_toa(htonl(session[s].ip)));
 401             cli_print(cli, "    HSD sid:        %lu", session[s].sid);
 402             cli_print(cli, "    Idle time:      %u seconds", abs(time_now - session[s].last_packet));
 403             cli_print(cli, "    Next Recv:      %u", session[s].nr);
 404             cli_print(cli, "    Next Send:      %u", session[s].ns);
 405             cli_print(cli, "    Bytes In/Out:   %lu/%lu", (unsigned long)session[s].total_cout, (unsigned long)session[s].total_cin);
 406             cli_print(cli, "    Pkts In/Out:    %lu/%lu", (unsigned long)session[s].pout, (unsigned long)session[s].pin);
 407             cli_print(cli, "    MRU:            %d", session[s].mru);
 408             cli_print(cli, "    Radius Session: %u", session[s].radius);
 409             cli_print(cli, "    Rx Speed:       %lu", session[s].rx_connect_speed);
 410             cli_print(cli, "    Tx Speed:       %lu", session[s].tx_connect_speed);
 411             if (session[s].snoop_ip && session[s].snoop_port)
 412                 cli_print(cli, "        Intercepted:    %s:%d", inet_toa(session[s].snoop_ip), session[s] .snoop_port);
 413             else
 414                 cli_print(cli, "        Intercepted:    no");
 415             cli_print(cli, "    Throttled:      %s", session[s].throttle ? "YES" : "no");
 416             cli_print(cli, "    Walled Garden:  %s", session[s].walled_garden ? "YES" : "no");
 417             cli_print(cli, "    Filter BucketI: %d", session[s].tbf_in);
 418             cli_print(cli, "    Filter BucketO: %d", session[s].tbf_out);
 419         }
 420         return CLI_OK;
 421     }
 422
 423     // Show Summary
 424     cli_print(cli, "  %s %4s %-32s %-15s %s %s %s %10s %10s %10s %4s %-15s %s",
 425             "SID",
 426             "TID",
 427             "Username",
 428             "IP",
 429             "I",
 430             "T",
 431             "G",
 432             "opened",
 433             "downloaded",
 434             "uploaded",
 435             "idle",
 436             "LAC",
 437             "CLI");
 438     for (i = 1; i < MAXSESSION; i++)
 439     {
 440         char *userip, *tunnelip;
 441         if (!session[i].opened) continue;
 442         userip = strdup(inet_toa(htonl(session[i].ip)));
 443         tunnelip = strdup(inet_toa(htonl(tunnel[ session[i].tunnel ].ip)));
 444         cli_print(cli, "%5d %4d %-32s %-15s %s %s %s %10u %10lu %10lu %4u %-15s %s",
 445                 i,
 446                 session[i].tunnel,
 447                 session[i].user[0] ? session[i].user : "*",
 448                 userip,
 449                 (session[i].snoop_ip && session[i].snoop_port) ? "Y" : "N",
 450                 (session[i].throttle) ? "Y" : "N",
 451                 (session[i].walled_garden) ? "Y" : "N",
 452                 abs(time_now - (unsigned long)session[i].opened),
 453                 (unsigned long)session[i].total_cout,
 454                 (unsigned long)session[i].total_cin,
 455                 abs(time_now - (session[i].last_packet ? session[i].last_packet : time_now)),
 456                 tunnelip,
 457                 session[i].calling[0] ? session[i].calling : "*");
 458         if (userip) free(userip);
 459         if (tunnelip) free(tunnelip);
 460     }
 461     return CLI_OK;
 462 }
 463
 464 int cmd_show_tunnels(struct cli_def *cli, char *command, char **argv, int argc)
 465 {
 466     int i, x, show_all = 0;
 467     char *states[] = {
 468         "Free",
 469         "Open",
 470         "Closing",
 471         "Opening",
 472     };
 473
 474     if (CLI_HELP_REQUESTED)
 475     {
 476         if (argc > 1)
 477             return cli_arg_help(cli, 1,
 478                 "<1-%d>", MAXTUNNEL-1, "Show specific tunnel by id",
 479                 NULL);
 480
 481         return cli_arg_help(cli, 1,
 482             "all", "Show all tunnels, including unused",
 483             "<1-%d>", MAXTUNNEL-1, "Show specific tunnel by id",
 484             NULL);
 485     }
 486
 487     time(&time_now);
 488     if (argc > 0)
 489     {
 490         if (strcmp(argv[0], "all") == 0)
 491         {
 492             show_all = 1;
 493         }
 494         else
 495         {
 496             // Show individual tunnel
 497             for (i = 0; i < argc; i++)
 498             {
 499                 char s[65535] = {0};
 500                 unsigned int t;
 501                 t = atoi(argv[i]);
 502                 if (t <= 0 || t >= MAXTUNNEL)
 503                 {
 504                     cli_print(cli, "Invalid tunnel id \"%s\"", argv[i]);
 505                     continue;
 506                 }
 507                 cli_print(cli, "\r\nTunnel %d:", t);
 508                 cli_print(cli, "        State:          %s", states[tunnel[t].state]);
 509                 cli_print(cli, "        Hostname:       %s", tunnel[t].hostname[0] ? tunnel[t].hostname : "(none)");
 510                 cli_print(cli, "        Remote IP:      %s", inet_toa(htonl(tunnel[t].ip)));
 511                 cli_print(cli, "        Remote Port:    %d", tunnel[t].port);
 512                 cli_print(cli, "        Rx Window:      %u", tunnel[t].window);
 513                 cli_print(cli, "        Next Recv:      %u", tunnel[t].nr);
 514                 cli_print(cli, "        Next Send:      %u", tunnel[t].ns);
 515                 cli_print(cli, "        Queue Len:      %u", tunnel[t].controlc);
 516                 cli_print(cli, "        Last Packet Age:%u", (unsigned)(time_now - tunnel[t].last));
 517
 518                 for (x = 0; x < MAXSESSION; x++)
 519                         if (session[x].tunnel == t && session[x].opened && !session[x].die)
 520                                 sprintf(s, "%s%u ", s, x);
 521                 cli_print(cli, "        Sessions:       %s", s);
 522             }
 523             return CLI_OK;
 524         }
 525     }
 526
 527     // Show tunnel summary
 528     cli_print(cli, "%4s %20s %20s %6s %s",
 529             "TID",
 530             "Hostname",
 531             "IP",
 532             "State",
 533             "Sessions");
 534     for (i = 1; i < MAXTUNNEL; i++)
 535     {
 536         int sessions = 0;
 537         if (!show_all && (!tunnel[i].ip || tunnel[i].die || !tunnel[i].hostname[0])) continue;
 538
 539         for (x = 0; x < MAXSESSION; x++) if (session[x].tunnel == i && session[x].opened && !session[x].die) sessions++;
 540         cli_print(cli, "%4d %20s %20s %6s %6d",
 541                 i,
 542                 *tunnel[i].hostname ? tunnel[i].hostname : "(null)",
 543                 inet_toa(htonl(tunnel[i].ip)),
 544                 states[tunnel[i].state],
 545                 sessions);
 546     }
 547     return CLI_OK;
 548 }
 549
 550 int cmd_show_users(struct cli_def *cli, char *command, char **argv, int argc)
 551 {
 552     char sid[32][8];
 553     char *sargv[32];
 554     int sargc = 0;
 555     int i;
 556
 557     if (CLI_HELP_REQUESTED)
 558         return cli_arg_help(cli, 1,
 559             "USER", "Show details for specific username",
 560             NULL);
 561
 562     for (i = 0; i < MAXSESSION; i++)
 563     {
 564         if (!session[i].opened) continue;
 565         if (!session[i].user[0]) continue;
 566         if (argc > 0)
 567         {
 568             int j;
 569             for (j = 0; j < argc && sargc < 32; j++)
 570             {
 571                 if (strcmp(argv[j], session[i].user) == 0)
 572                 {
 573                     snprintf(sid[sargc], sizeof(sid[0]), "%d", i);
 574                     sargv[sargc] = sid[sargc];
 575                     sargc++;
 576                 }
 577             }
 578
 579             continue;
 580         }
 581
 582         cli_print(cli, "%s", session[i].user);
 583     }
 584
 585     if (sargc > 0)
 586         return cmd_show_session(cli, "users", sargv, sargc);
 587
 588     return CLI_OK;
 589 }
 590
 591 int cmd_show_counters(struct cli_def *cli, char *command, char **argv, int argc)
 592 {
 593     if (CLI_HELP_REQUESTED)
 594         return CLI_HELP_NO_ARGS;
 595
 596     cli_print(cli, "%-10s %-8s %-10s %-8s", "Ethernet", "Bytes", "Packets", "Errors");
 597     cli_print(cli, "%-10s %8lu %8lu %8lu", "RX",
 598             GET_STAT(tun_rx_bytes),
 599             GET_STAT(tun_rx_packets),
 600             GET_STAT(tun_rx_errors));
 601     cli_print(cli, "%-10s %8lu %8lu %8lu", "TX",
 602             GET_STAT(tun_tx_bytes),
 603             GET_STAT(tun_tx_packets),
 604             GET_STAT(tun_tx_errors));
 605     cli_print(cli, "");
 606
 607     cli_print(cli, "%-10s %-8s %-10s %-8s %-8s", "Tunnel", "Bytes", "Packets", "Errors", "Retries");
 608     cli_print(cli, "%-10s %8lu %8lu %8lu %8lu", "RX",
 609             GET_STAT(tunnel_rx_bytes),
 610             GET_STAT(tunnel_rx_packets),
 611             GET_STAT(tunnel_rx_errors),
 612             0L);
 613     cli_print(cli, "%-10s %8lu %8lu %8lu %8lu", "TX",
 614             GET_STAT(tunnel_tx_bytes),
 615             GET_STAT(tunnel_tx_packets),
 616             GET_STAT(tunnel_tx_errors),
 617             GET_STAT(tunnel_retries));
 618     cli_print(cli, "");
 619
 620     cli_print(cli, "%-30s%-10s", "Counter", "Value");
 621     cli_print(cli, "-----------------------------------------");
 622     cli_print(cli, "%-30s%lu", "radius_retries",        GET_STAT(radius_retries));
 623     cli_print(cli, "%-30s%lu", "arp_sent",              GET_STAT(arp_sent));
 624     cli_print(cli, "%-30s%lu", "packets_snooped",       GET_STAT(packets_snooped));
 625     cli_print(cli, "%-30s%lu", "tunnel_created",        GET_STAT(tunnel_created));
 626     cli_print(cli, "%-30s%lu", "session_created",       GET_STAT(session_created));
 627     cli_print(cli, "%-30s%lu", "tunnel_timeout",        GET_STAT(tunnel_timeout));
 628     cli_print(cli, "%-30s%lu", "session_timeout",       GET_STAT(session_timeout));
 629     cli_print(cli, "%-30s%lu", "radius_timeout",        GET_STAT(radius_timeout));
 630     cli_print(cli, "%-30s%lu", "radius_overflow",       GET_STAT(radius_overflow));
 631     cli_print(cli, "%-30s%lu", "tunnel_overflow",       GET_STAT(tunnel_overflow));
 632     cli_print(cli, "%-30s%lu", "session_overflow",      GET_STAT(session_overflow));
 633     cli_print(cli, "%-30s%lu", "ip_allocated",          GET_STAT(ip_allocated));
 634     cli_print(cli, "%-30s%lu", "ip_freed",              GET_STAT(ip_freed));
 635     cli_print(cli, "%-30s%lu", "cluster_forwarded",     GET_STAT(c_forwarded));
 636     cli_print(cli, "%-30s%lu", "recv_forward",          GET_STAT(recv_forward));
 637
 638
 639 #ifdef STATISTICS
 640     cli_print(cli, "\n%-30s%-10s", "Counter", "Value");
 641     cli_print(cli, "-----------------------------------------");
 642     cli_print(cli, "%-30s%lu", "call_processtun",       GET_STAT(call_processtun));
 643     cli_print(cli, "%-30s%lu", "call_processipout",     GET_STAT(call_processipout));
 644     cli_print(cli, "%-30s%lu", "call_processudp",       GET_STAT(call_processudp));
 645     cli_print(cli, "%-30s%lu", "call_processpap",       GET_STAT(call_processpap));
 646     cli_print(cli, "%-30s%lu", "call_processchap",      GET_STAT(call_processchap));
 647     cli_print(cli, "%-30s%lu", "call_processlcp",       GET_STAT(call_processlcp));
 648     cli_print(cli, "%-30s%lu", "call_processipcp",      GET_STAT(call_processipcp));
 649     cli_print(cli, "%-30s%lu", "call_processipin",      GET_STAT(call_processipin));
 650     cli_print(cli, "%-30s%lu", "call_processccp",       GET_STAT(call_processccp));
 651     cli_print(cli, "%-30s%lu", "call_processrad",       GET_STAT(call_processrad));
 652     cli_print(cli, "%-30s%lu", "call_sendarp",          GET_STAT(call_sendarp));
 653     cli_print(cli, "%-30s%lu", "call_sendipcp",         GET_STAT(call_sendipcp));
 654     cli_print(cli, "%-30s%lu", "call_sendchap",         GET_STAT(call_sendchap));
 655     cli_print(cli, "%-30s%lu", "call_sessionbyip",      GET_STAT(call_sessionbyip));
 656     cli_print(cli, "%-30s%lu", "call_sessionbyuser",    GET_STAT(call_sessionbyuser));
 657     cli_print(cli, "%-30s%lu", "call_tunnelsend",       GET_STAT(call_tunnelsend));
 658     cli_print(cli, "%-30s%lu", "call_tunnelkill",       GET_STAT(call_tunnelkill));
 659     cli_print(cli, "%-30s%lu", "call_tunnelshutdown",   GET_STAT(call_tunnelshutdown));
 660     cli_print(cli, "%-30s%lu", "call_sessionkill",      GET_STAT(call_sessionkill));
 661     cli_print(cli, "%-30s%lu", "call_sessionshutdown",  GET_STAT(call_sessionshutdown));
 662     cli_print(cli, "%-30s%lu", "call_sessionsetup",     GET_STAT(call_sessionsetup));
 663     cli_print(cli, "%-30s%lu", "call_assign_ip_address",GET_STAT(call_assign_ip_address));
 664     cli_print(cli, "%-30s%lu", "call_free_ip_address",  GET_STAT(call_free_ip_address));
 665     cli_print(cli, "%-30s%lu", "call_dump_acct_info",   GET_STAT(call_dump_acct_info));
 666     cli_print(cli, "%-30s%lu", "call_radiussend",       GET_STAT(call_radiussend));
 667     cli_print(cli, "%-30s%lu", "call_radiusretry",      GET_STAT(call_radiusretry));
 668 #endif
 669     return CLI_OK;
 670 }
 671
 672 int cmd_show_version(struct cli_def *cli, char *command, char **argv, int argc)
 673 {
 674     int tag = 0;
 675     int file = 0;
 676     int i = 0;
 677
 678     if (CLI_HELP_REQUESTED)
 679         return cli_arg_help(cli, 1,
 680             "tag", "Include CVS release tag",
 681             "file", "Include file versions",
 682             NULL);
 683
 684     for (i = 0; i < argc; i++)
 685         if (!strcmp(argv[i], "tag"))
 686             tag++;
 687         else if (!strcmp(argv[i], "file"))
 688             file++;
 689
 690     cli_print(cli, "L2TPNS %s", VERSION);
 691     if (tag)
 692     {
 693         char const *p = strchr(cvs_name, ':');
 694         char const *e;
 695         if (p)
 696         {
 697             p++;
 698             while (isspace(*p))
 699                 p++;
 700         }
 701
 702         if (!p || *p == '$')
 703             p = "HEAD";
 704
 705         e = strpbrk(p, " \t$");
 706         cli_print(cli, "Tag: %.*s", e ? e - p + 1 : strlen(p), p);
 707     }
 708
 709     if (file)
 710     {
 711         extern linked_list *loaded_plugins;
 712         void *p;
 713
 714         cli_print(cli, "Files:");
 715         cli_print(cli, "  %s", cvs_id_arp);
 716 #ifdef BGP
 717         cli_print(cli, "  %s", cvs_id_bgp);
 718 #endif /* BGP */
 719         cli_print(cli, "  %s", cvs_id_cli);
 720         cli_print(cli, "  %s", cvs_id_cluster);
 721         cli_print(cli, "  %s", cvs_id_constants);
 722         cli_print(cli, "  %s", cvs_id_control);
 723         cli_print(cli, "  %s", cvs_id_icmp);
 724         cli_print(cli, "  %s", cvs_id_l2tpns);
 725         cli_print(cli, "  %s", cvs_id_ll);
 726         cli_print(cli, "  %s", cvs_id_md5);
 727         cli_print(cli, "  %s", cvs_id_ppp);
 728         cli_print(cli, "  %s", cvs_id_radius);
 729         cli_print(cli, "  %s", cvs_id_tbf);
 730         cli_print(cli, "  %s", cvs_id_util);
 731
 732         ll_reset(loaded_plugins);
 733         while ((p = ll_next(loaded_plugins)))
 734         {
 735             char const **id = dlsym(p, "cvs_id");
 736             if (id)
 737                 cli_print(cli, "  %s", *id);
 738         }
 739     }
 740
 741     return CLI_OK;
 742 }
 743
 744 int cmd_show_pool(struct cli_def *cli, char *command, char **argv, int argc)
 745 {
 746     int i;
 747     int used = 0, free = 0, show_all = 0;
 748
 749     if (!config->cluster_iam_master)
 750     {
 751         cli_print(cli, "Can't do this on a slave.  Do it on %s", inet_toa(config->cluster_master_address));
 752         return CLI_OK;
 753     }
 754
 755     if (CLI_HELP_REQUESTED)
 756     {
 757         if (argc > 1)
 758             return cli_arg_help(cli, 1, NULL);
 759
 760         return cli_arg_help(cli, 1,
 761             "all", "Show all pool addresses, including unused",
 762             NULL);
 763     }
 764
 765     if (argc > 0 && strcmp(argv[0], "all") == 0)
 766         show_all = 1;
 767
 768     time(&time_now);
 769     cli_print(cli, "%-15s %4s %8s %s", "IP Address", "Used", "Session", "User");
 770     for (i = 0; i < MAXIPPOOL; i++)
 771     {
 772         if (!ip_address_pool[i].address) continue;
 773         if (ip_address_pool[i].assigned)
 774         {
 775             cli_print(cli, "%-15s    Y %8d %s",
 776                 inet_toa(htonl(ip_address_pool[i].address)), ip_address_pool[i].session, session[ip_address_pool[i].session].user);
 777
 778             used++;
 779         }
 780         else
 781         {
 782             if (ip_address_pool[i].last)
 783                 cli_print(cli, "%-15s    N %8s [%s] %ds",
 784                     inet_toa(htonl(ip_address_pool[i].address)), "",
 785                     ip_address_pool[i].user, time_now - ip_address_pool[i].last);
 786             else if (show_all)
 787                 cli_print(cli, "%-15s    N", inet_toa(htonl(ip_address_pool[i].address)));
 788
 789             free++;
 790         }
 791     }
 792
 793     if (!show_all)
 794         cli_print(cli, "(Not displaying unused addresses)");
 795
 796     cli_print(cli, "\r\nFree: %d\r\nUsed: %d", free, used);
 797     return CLI_OK;
 798 }
 799
 800 void print_save_config(struct cli_def *cli, char *string)
 801 {
 802     if (save_config_fh)
 803         fprintf(save_config_fh, "%s\n", string);
 804 }
 805
 806 int cmd_write_memory(struct cli_def *cli, char *command, char **argv, int argc)
 807 {
 808     if (CLI_HELP_REQUESTED)
 809         return CLI_HELP_NO_ARGS;
 810
 811     if ((save_config_fh = fopen(config->config_file, "w")))
 812     {
 813         cli_print(cli, "Writing configuration");
 814         cli_print_callback(cli, print_save_config);
 815         cmd_show_run(cli, command, argv, argc);
 816         cli_print_callback(cli, NULL);
 817         fclose(save_config_fh);
 818     }
 819     else
 820     {
 821         cli_print(cli, "Error writing configuration: %s", strerror(errno));
 822     }
 823     return CLI_OK;
 824 }
 825
 826 int cmd_show_run(struct cli_def *cli, char *command, char **argv, int argc)
 827 {
 828     int i;
 829
 830     if (CLI_HELP_REQUESTED)
 831         return CLI_HELP_NO_ARGS;
 832
 833     cli_print(cli, "# Current configuration:");
 834
 835     for (i = 0; config_values[i].key; i++)
 836     {
 837         void *value = ((void *)config) + config_values[i].offset;
 838         if (config_values[i].type == STRING)
 839             cli_print(cli, "set %s \"%.*s\"", config_values[i].key, config_values[i].size, (char *)value);
 840         else if (config_values[i].type == IP)
 841             cli_print(cli, "set %s %s", config_values[i].key, inet_toa(*(unsigned *)value));
 842         else if (config_values[i].type == SHORT)
 843             cli_print(cli, "set %s %hu", config_values[i].key, *(short *)value);
 844         else if (config_values[i].type == BOOL)
 845             cli_print(cli, "set %s %s", config_values[i].key, (*(int *)value) ? "yes" : "no");
 846         else if (config_values[i].type == INT)
 847             cli_print(cli, "set %s %d", config_values[i].key, *(int *)value);
 848         else if (config_values[i].type == UNSIGNED_LONG)
 849             cli_print(cli, "set %s %lu", config_values[i].key, *(unsigned long *)value);
 850     }
 851
 852     cli_print(cli, "# Plugins");
 853     for (i = 0; i < MAXPLUGINS; i++)
 854     {
 855         if (*config->plugins[i])
 856         {
 857             cli_print(cli, "load plugin \"%s\"", config->plugins[i]);
 858         }
 859     }
 860
 861     cli_print(cli, "# end");
 862     return CLI_OK;
 863 }
 864
 865 int cmd_show_radius(struct cli_def *cli, char *command, char **argv, int argc)
 866 {
 867     int i, free = 0, used = 0, show_all = 0;
 868     char *states[] = {
 869         "NULL",
 870         "CHAP",
 871         "AUTH",
 872         "IPCP",
 873         "START",
 874         "STOP",
 875         "WAIT",
 876     };
 877
 878     if (CLI_HELP_REQUESTED)
 879     {
 880         if (argc > 1)
 881             return cli_arg_help(cli, 1, NULL);
 882
 883         return cli_arg_help(cli, 1,
 884             "all", "Show all RADIUS sessions, including unused",
 885             NULL);
 886     }
 887
 888     cli_print(cli, "%6s%5s%6s%9s%9s%4s", "Radius", "Sock", "State", "Session", "Retry", "Try");
 889
 890     time(&time_now);
 891
 892     if (argc > 0 && strcmp(argv[0], "all") == 0)
 893         show_all = 1;
 894
 895     for (i = 1; i < MAXRADIUS; i++)
 896     {
 897         if (radius[i].state == RADIUSNULL)
 898             free++;
 899         else
 900             used++;
 901
 902         if (!show_all && radius[i].state == RADIUSNULL) continue;
 903
 904         cli_print(cli, "%6d%5d%6s%9d%9u%4d",
 905                 i >> RADIUS_SHIFT,
 906                 i & RADIUS_MASK,
 907                 states[radius[i].state],
 908                 radius[i].session,
 909                 radius[i].retry,
 910                 radius[i].try);
 911     }
 912
 913     cli_print(cli, "\r\nFree: %d\r\nUsed: %d", free, used);
 914
 915     return CLI_OK;
 916 }
 917
 918 int cmd_show_plugins(struct cli_def *cli, char *command, char **argv, int argc)
 919 {
 920     int i;
 921
 922     if (CLI_HELP_REQUESTED)
 923         return CLI_HELP_NO_ARGS;
 924
 925     cli_print(cli, "Plugins currently loaded:");
 926     for (i = 0; i < MAXPLUGINS; i++)
 927     {
 928         if (*config->plugins[i])
 929         {
 930             cli_print(cli, "  %s", config->plugins[i]);
 931         }
 932     }
 933     return CLI_OK;
 934 }
 935
 936 int cmd_show_throttle(struct cli_def *cli, char *command, char **argv, int argc)
 937 {
 938     int i;
 939
 940     if (CLI_HELP_REQUESTED)
 941         return CLI_HELP_NO_ARGS;
 942
 943     cli_print(cli, "Token bucket filters:");
 944     cli_print(cli, "%-6s %8s %-4s", "ID", "Handle", "Used");
 945     for (i = 0; i < MAXSESSION; i++)
 946     {
 947         if (!session[i].throttle)
 948             continue;
 949
 950         cli_print(cli, "%-6d %8d %8d",
 951             i,
 952             session[i].tbf_in,
 953             session[i].tbf_out);
 954     }
 955     return CLI_OK;
 956 }
 957
 958 int cmd_show_banana(struct cli_def *cli, char *command, char **argv, int argc)
 959 {
 960     if (CLI_HELP_REQUESTED)
 961         return CLI_HELP_NO_ARGS;
 962
 963     cli_print(cli, " _\n"
 964                       "//\\\n"
 965                       "V  \\\n"
 966                       " \\  \\_\n"
 967                       "  \\,'.`-.\n"
 968                       "   |\\ `. `.\n"
 969                       "   ( \\  `. `-.                        _,.-:\\\n"
 970                       "    \\ \\   `.  `-._             __..--' ,-';/\n"
 971                       "     \\ `.   `-.   `-..___..---'   _.--' ,'/\n"
 972                       "      `. `.    `-._        __..--'    ,' /\n"
 973                       "        `. `-_     ``--..''       _.-' ,'\n"
 974                       "          `-_ `-.___        __,--'   ,'\n"
 975                       "             `-.__  `----\"\"\"    __.-'\n"
 976                       "hh                `--..____..--'");
 977
 978     return CLI_OK;
 979 }
 980
 981 int cmd_clear_counters(struct cli_def *cli, char *command, char **argv, int argc)
 982 {
 983     if (CLI_HELP_REQUESTED)
 984         return CLI_HELP_NO_ARGS;
 985
 986     cli_print(cli, "Counters cleared");
 987     SET_STAT(last_reset, time(NULL));
 988     return CLI_OK;
 989 }
 990
 991 int cmd_drop_user(struct cli_def *cli, char *command, char **argv, int argc)
 992 {
 993     int i;
 994     sessionidt s;
 995
 996     if (CLI_HELP_REQUESTED)
 997         return cli_arg_help(cli, argc > 1,
 998             "USER", "Username of session to drop", NULL);
 999
1000     if (!config->cluster_iam_master)
1001     {
1002         cli_print(cli, "Can't do this on a slave.  Do it on %s", inet_toa(config->cluster_master_address));
1003         return CLI_OK;
1004     }
1005
1006     if (!argc)
1007     {
1008         cli_print(cli, "Specify a user to drop");
1009         return CLI_OK;
1010     }
1011
1012     for (i = 0; i < argc; i++)
1013     {
1014         if (!(s = sessionbyuser(argv[i])))
1015         {
1016             cli_print(cli, "User %s is not connected", argv[i]);
1017             continue;
1018         }
1019
1020         if (session[s].ip && session[s].opened && !session[s].die)
1021         {
1022             cli_print(cli, "Dropping user %s", session[s].user);
1023             cli_session_actions[s].action |= CLI_SESS_KILL;
1024         }
1025     }
1026
1027     return CLI_OK;
1028 }
1029
1030 int cmd_drop_tunnel(struct cli_def *cli, char *command, char **argv, int argc)
1031 {
1032     int i;
1033     tunnelidt t;
1034
1035     if (CLI_HELP_REQUESTED)
1036         return cli_arg_help(cli, argc > 1,
1037             "<1-%d>", MAXTUNNEL-1, "Tunnel id to drop", NULL);
1038
1039     if (!config->cluster_iam_master)
1040     {
1041         cli_print(cli, "Can't do this on a slave.  Do it on %s", inet_toa(config->cluster_master_address));
1042         return CLI_OK;
1043     }
1044
1045     if (!argc)
1046     {
1047         cli_print(cli, "Specify a tunnel to drop");
1048         return CLI_OK;
1049     }
1050
1051     for (i = 0; i < argc; i++)
1052     {
1053         if ((t = atol(argv[i])) <= 0 || (t >= MAXTUNNEL))
1054         {
1055             cli_print(cli, "Invalid tunnel ID (1-%d)", MAXTUNNEL-1);
1056             continue;
1057         }
1058
1059         if (!tunnel[t].ip)
1060         {
1061             cli_print(cli, "Tunnel %d is not connected", t);
1062             continue;
1063         }
1064
1065         if (tunnel[t].die)
1066         {
1067             cli_print(cli, "Tunnel %d is already being shut down", t);
1068             continue;
1069         }
1070
1071         cli_print(cli, "Tunnel %d shut down (%s)", t, tunnel[t].hostname);
1072         cli_tunnel_actions[t].action |= CLI_TUN_KILL;
1073     }
1074
1075     return CLI_OK;
1076 }
1077
1078 int cmd_drop_session(struct cli_def *cli, char *command, char **argv, int argc)
1079 {
1080     int i;
1081     sessionidt s;
1082
1083     if (CLI_HELP_REQUESTED)
1084         return cli_arg_help(cli, argc > 1,
1085             "<1-%d>", MAXSESSION-1, "Session id to drop", NULL);
1086
1087     if (!config->cluster_iam_master)
1088     {
1089         cli_print(cli, "Can't do this on a slave.  Do it on %s", inet_toa(config->cluster_master_address));
1090         return CLI_OK;
1091     }
1092
1093     if (!argc)
1094     {
1095         cli_print(cli, "Specify a session id to drop");
1096         return CLI_OK;
1097     }
1098
1099     for (i = 0; i < argc; i++)
1100     {
1101         if ((s = atol(argv[i])) <= 0 || (s > MAXSESSION))
1102         {
1103             cli_print(cli, "Invalid session ID (1-%d)", MAXSESSION-1);
1104             continue;
1105         }
1106
1107         if (session[s].ip && session[s].opened && !session[s].die)
1108         {
1109             cli_print(cli, "Dropping session %d", s);
1110             cli_session_actions[s].action |= CLI_SESS_KILL;
1111         }
1112         else
1113         {
1114             cli_print(cli, "Session %d is not active.", s);
1115         }
1116     }
1117
1118     return CLI_OK;
1119 }
1120
1121 int cmd_snoop(struct cli_def *cli, char *command, char **argv, int argc)
1122 {
1123     ipt ip;
1124     u16 port;
1125     sessionidt s;
1126
1127     if (CLI_HELP_REQUESTED)
1128     {
1129         switch (argc)
1130         {
1131         case 1:
1132             return cli_arg_help(cli, 0,
1133                 "USER", "Username of session to snoop", NULL);
1134
1135         case 2:
1136             return cli_arg_help(cli, 0,
1137                 "A.B.C.D", "IP address of snoop destination", NULL);
1138
1139         case 3:
1140             return cli_arg_help(cli, 0,
1141                 "N", "Port of snoop destination", NULL);
1142
1143         case 4:
1144             if (!argv[3][1])
1145                 return cli_arg_help(cli, 1, NULL);
1146
1147         default:
1148             return CLI_OK;
1149         }
1150     }
1151
1152     if (!config->cluster_iam_master)
1153     {
1154         cli_print(cli, "Can't do this on a slave.  Do it on %s", inet_toa(config->cluster_master_address));
1155         return CLI_OK;
1156     }
1157
1158     if (argc < 3)
1159     {
1160         cli_print(cli, "Specify username ip port");
1161         return CLI_OK;
1162     }
1163
1164     if (!(s = sessionbyuser(argv[0])))
1165     {
1166         cli_print(cli, "User %s is not connected", argv[0]);
1167         return CLI_OK;
1168     }
1169
1170     ip = inet_addr(argv[1]);
1171     if (!ip || ip == INADDR_NONE)
1172     {
1173         cli_print(cli, "Cannot parse IP \"%s\"", argv[1]);
1174         return CLI_OK;
1175     }
1176
1177     port = atoi(argv[2]);
1178     if (!port)
1179     {
1180         cli_print(cli, "Invalid port %s", argv[2]);
1181         return CLI_OK;
1182     }
1183
1184     cli_print(cli, "Snooping user %s to %s:%d", argv[0], inet_toa(session[s].snoop_ip), session[s].snoop_port);
1185     cli_session_actions[s].snoop_ip = ip;
1186     cli_session_actions[s].snoop_port = port;
1187     cli_session_actions[s].action |= CLI_SESS_SNOOP;
1188
1189     return CLI_OK;
1190 }
1191
1192 int cmd_no_snoop(struct cli_def *cli, char *command, char **argv, int argc)
1193 {
1194     int i;
1195     sessionidt s;
1196
1197     if (CLI_HELP_REQUESTED)
1198         return cli_arg_help(cli, argc > 1,
1199             "USER", "Username of session to un-snoop", NULL);
1200
1201     if (!config->cluster_iam_master)
1202     {
1203         cli_print(cli, "Can't do this on a slave.  Do it on %s", inet_toa(config->cluster_master_address));
1204         return CLI_OK;
1205     }
1206
1207     if (!argc)
1208     {
1209         cli_print(cli, "Specify a user");
1210         return CLI_OK;
1211     }
1212
1213     for (i = 0; i < argc; i++)
1214     {
1215         if (!(s = sessionbyuser(argv[i])))
1216         {
1217             cli_print(cli, "User %s is not connected", argv[i]);
1218             continue;
1219         }
1220
1221         cli_print(cli, "Not snooping user %s", argv[i]);
1222         cli_session_actions[s].action |= CLI_SESS_NOSNOOP;
1223     }
1224     return CLI_OK;
1225 }
1226
1227 int cmd_throttle(struct cli_def *cli, char *command, char **argv, int argc)
1228 {
1229     int i;
1230     sessionidt s;
1231
1232     if (CLI_HELP_REQUESTED)
1233         return cli_arg_help(cli, argc > 1,
1234             "USER", "Username of session to throttle", NULL);
1235
1236     if (!config->cluster_iam_master)
1237     {
1238         cli_print(cli, "Can't do this on a slave.  Do it on %s", inet_toa(config->cluster_master_address));
1239         return CLI_OK;
1240     }
1241
1242     if (!argc)
1243     {
1244         cli_print(cli, "Specify a user");
1245         return CLI_OK;
1246     }
1247
1248     for (i = 0; i < argc; i++)
1249     {
1250         if (!(s = sessionbyuser(argv[i])))
1251         {
1252             cli_print(cli, "User %s is not connected", argv[i]);
1253             continue;
1254         }
1255
1256         if (session[s].throttle)
1257         {
1258             cli_print(cli, "User %s already throttled", argv[i]);
1259             continue;
1260         }
1261
1262         cli_print(cli, "Throttling user %s", argv[i]);
1263         cli_session_actions[s].throttle = config->rl_rate; // could be configurable at some stage
1264         cli_session_actions[s].action |= CLI_SESS_THROTTLE;
1265     }
1266
1267     return CLI_OK;
1268 }
1269
1270 int cmd_no_throttle(struct cli_def *cli, char *command, char **argv, int argc)
1271 {
1272     int i;
1273     sessionidt s;
1274
1275     if (CLI_HELP_REQUESTED)
1276         return cli_arg_help(cli, argc > 1,
1277             "USER", "Username of session to un-throttle", NULL);
1278
1279     if (!config->cluster_iam_master)
1280     {
1281         cli_print(cli, "Can't do this on a slave.  Do it on %s", inet_toa(config->cluster_master_address));
1282         return CLI_OK;
1283     }
1284
1285     if (!argc)
1286     {
1287         cli_print(cli, "Specify a user");
1288         return CLI_OK;
1289     }
1290
1291     for (i = 0; i < argc; i++)
1292     {
1293         if (!(s = sessionbyuser(argv[i])))
1294         {
1295             cli_print(cli, "User %s is not connected", argv[i]);
1296             continue;
1297         }
1298
1299         if (!session[s].throttle)
1300         {
1301             cli_print(cli, "User %s not throttled", argv[i]);
1302             continue;
1303         }
1304
1305         cli_print(cli, "Unthrottling user %s", argv[i]);
1306         cli_session_actions[s].action |= CLI_SESS_NOTHROTTLE;
1307     }
1308
1309     return CLI_OK;
1310 }
1311
1312 int cmd_debug(struct cli_def *cli, char *command, char **argv, int argc)
1313 {
1314     int i;
1315
1316     if (CLI_HELP_REQUESTED)
1317         return cli_arg_help(cli, 1,
1318             "all",      "Enable debugging for all except \"data\"",
1319             "critical", "", // FIXME: add descriptions
1320             "error",    "",
1321             "warning",  "",
1322             "info",     "",
1323             "calls",    "",
1324             "data",     "",
1325             NULL);
1326
1327     if (!argc)
1328     {
1329         char *p = (char *) &debug_flags;
1330         for (i = 0; i < sizeof(debug_flags); i++)
1331         {
1332             if (p[i])
1333             {
1334                 cli_print(cli, "Currently debugging:%s%s%s%s%s%s",
1335                     (debug_flags.critical) ? " critical" : "",
1336                     (debug_flags.error)    ? " error"    : "",
1337                     (debug_flags.warning)  ? " warning"  : "",
1338                     (debug_flags.info)     ? " info"     : "",
1339                     (debug_flags.calls)    ? " calls"    : "",
1340                     (debug_flags.data)     ? " data"     : "");
1341
1342                 return CLI_OK;
1343             }
1344         }
1345
1346         cli_print(cli, "Debugging off");
1347         return CLI_OK;
1348     }
1349
1350     for (i = 0; i < argc; i++)
1351     {
1352         int len = strlen(argv[i]);
1353
1354         if (argv[i][0] == 'c' && len < 2)
1355             len = 2; /* distinguish [cr]itical from [ca]lls */
1356
1357         if (!strncasecmp(argv[i], "critical", len)) { debug_flags.critical = 1; continue; }
1358         if (!strncasecmp(argv[i], "error",    len)) { debug_flags.error = 1;    continue; }
1359         if (!strncasecmp(argv[i], "warning",  len)) { debug_flags.warning = 1;  continue; }
1360         if (!strncasecmp(argv[i], "info",     len)) { debug_flags.info = 1;     continue; }
1361         if (!strncasecmp(argv[i], "calls",    len)) { debug_flags.calls = 1;    continue; }
1362         if (!strncasecmp(argv[i], "data",     len)) { debug_flags.data = 1;     continue; }
1363         if (!strncasecmp(argv[i], "all",      len))
1364         {
1365             memset(&debug_flags, 1, sizeof(debug_flags));
1366             debug_flags.data = 0;
1367             continue;
1368         }
1369
1370         cli_print(cli, "Invalid debugging flag \"%s\"", argv[i]);
1371     }
1372
1373     return CLI_OK;
1374 }
1375
1376 int cmd_no_debug(struct cli_def *cli, char *command, char **argv, int argc)
1377 {
1378     int i;
1379
1380     if (CLI_HELP_REQUESTED)
1381         return cli_arg_help(cli, 1,
1382             "all",      "Disable all debugging",
1383             "critical", "", // FIXME: add descriptions
1384             "error",    "",
1385             "warning",  "",
1386             "info",     "",
1387             "calls",    "",
1388             "data",     "",
1389             NULL);
1390
1391     if (!argc)
1392     {
1393         memset(&debug_flags, 0, sizeof(debug_flags));
1394         return CLI_OK;
1395     }
1396
1397     for (i = 0; i < argc; i++)
1398     {
1399         int len = strlen(argv[i]);
1400
1401         if (argv[i][0] == 'c' && len < 2)
1402             len = 2; /* distinguish [cr]itical from [ca]lls */
1403
1404         if (!strncasecmp(argv[i], "critical", len)) { debug_flags.critical = 0; continue; }
1405         if (!strncasecmp(argv[i], "error",    len)) { debug_flags.error = 0;    continue; }
1406         if (!strncasecmp(argv[i], "warning",  len)) { debug_flags.warning = 0;  continue; }
1407         if (!strncasecmp(argv[i], "info",     len)) { debug_flags.info = 0;     continue; }
1408         if (!strncasecmp(argv[i], "calls",    len)) { debug_flags.calls = 0;    continue; }
1409         if (!strncasecmp(argv[i], "data",     len)) { debug_flags.data = 0;     continue; }
1410         if (!strncasecmp(argv[i], "all",      len))
1411         {
1412             memset(&debug_flags, 0, sizeof(debug_flags));
1413             continue;
1414         }
1415
1416         cli_print(cli, "Invalid debugging flag \"%s\"", argv[i]);
1417     }
1418
1419     return CLI_OK;
1420 }
1421
1422 int cmd_load_plugin(struct cli_def *cli, char *command, char **argv, int argc)
1423 {
1424     int i, firstfree = 0;
1425
1426     if (CLI_HELP_REQUESTED)
1427         return cli_arg_help(cli, argc > 1,
1428             "PLUGIN", "Name of plugin to load", NULL);
1429
1430     if (argc != 1)
1431     {
1432         cli_print(cli, "Specify a plugin to load");
1433         return CLI_OK;
1434     }
1435
1436     for (i = 0; i < MAXPLUGINS; i++)
1437     {
1438         if (!*config->plugins[i] && !firstfree)
1439             firstfree = i;
1440         if (strcmp(config->plugins[i], argv[0]) == 0)
1441         {
1442             cli_print(cli, "Plugin is already loaded");
1443             return CLI_OK;
1444         }
1445     }
1446
1447     if (firstfree)
1448     {
1449         strncpy(config->plugins[firstfree], argv[0], sizeof(config->plugins[firstfree]) - 1);
1450         config->reload_config = 1;
1451         cli_print(cli, "Loading plugin %s", argv[0]);
1452     }
1453
1454     return CLI_OK;
1455 }
1456
1457 int cmd_remove_plugin(struct cli_def *cli, char *command, char **argv, int argc)
1458 {
1459     int i;
1460
1461     if (CLI_HELP_REQUESTED)
1462         return cli_arg_help(cli, argc > 1,
1463             "PLUGIN", "Name of plugin to unload", NULL);
1464
1465     if (argc != 1)
1466     {
1467         cli_print(cli, "Specify a plugin to remove");
1468         return CLI_OK;
1469     }
1470
1471     for (i = 0; i < MAXPLUGINS; i++)
1472     {
1473         if (strcmp(config->plugins[i], argv[0]) == 0)
1474         {
1475             config->reload_config = 1;
1476             memset(config->plugins[i], 0, sizeof(config->plugins[i]));
1477             return CLI_OK;
1478         }
1479     }
1480
1481     cli_print(cli, "Plugin is not loaded");
1482     return CLI_OK;
1483 }
1484
1485 char *duration(time_t secs)
1486 {
1487     static char *buf = NULL;
1488     int p = 0;
1489
1490     if (!buf) buf = calloc(64, 1);
1491
1492     if (secs >= 86400)
1493     {
1494         int days = secs / 86400;
1495         p = sprintf(buf, "%d day%s, ", days, days > 1 ? "s" : "");
1496         secs %= 86400;
1497     }
1498
1499     if (secs >= 3600)
1500     {
1501         int mins = secs / 60;
1502         int hrs = mins / 60;
1503
1504         mins %= 60;
1505         sprintf(buf + p, "%d:%02d", hrs, mins);
1506     }
1507     else if (secs >= 60)
1508     {
1509         int mins = secs / 60;
1510         sprintf(buf + p, "%d min%s", mins, mins > 1 ? "s" : "");
1511     }
1512     else
1513         sprintf(buf, "%ld sec%s", secs, secs > 1 ? "s" : "");
1514
1515     return buf;
1516 }
1517
1518 int cmd_uptime(struct cli_def *cli, char *command, char **argv, int argc)
1519 {
1520     FILE *fh;
1521     char buf[100], *p = buf, *loads[3];
1522     int i, num_sessions = 0;
1523
1524     if (CLI_HELP_REQUESTED)
1525         return CLI_HELP_NO_ARGS;
1526
1527     fh = fopen("/proc/loadavg", "r");
1528     fgets(buf, 100, fh);
1529     fclose(fh);
1530
1531     for (i = 0; i < 3; i++)
1532         loads[i] = strdup(strsep(&p, " "));
1533
1534     time(&time_now);
1535     strftime(buf, 99, "%H:%M:%S", localtime(&time_now));
1536
1537     for (i = 1; i < MAXSESSION; i++)
1538         if (session[i].opened) num_sessions++;
1539
1540     cli_print(cli, "%s up %s, %d users, load average: %s, %s, %s",
1541             buf,
1542             duration(time_now - config->start_time),
1543             num_sessions,
1544             loads[0], loads[1], loads[2]
1545     );
1546     for (i = 0; i < 3; i++)
1547         if (loads[i]) free(loads[i]);
1548
1549     cli_print(cli, "Bandwidth: %s", config->bandwidth);
1550
1551     return CLI_OK;
1552 }
1553
1554 int cmd_set(struct cli_def *cli, char *command, char **argv, int argc)
1555 {
1556     int i;
1557
1558     if (CLI_HELP_REQUESTED)
1559     {
1560         switch (argc)
1561         {
1562         case 1:
1563             {
1564                 int len = strlen(argv[0])-1;
1565                 for (i = 0; config_values[i].key; i++)
1566                     if (!len || !strncmp(argv[0], config_values[i].key, len))
1567                         cli_print(cli, "  %s", config_values[i].key);
1568             }
1569
1570             return CLI_OK;
1571
1572         case 2:
1573             return cli_arg_help(cli, 0,
1574                 "VALUE", "Value for variable", NULL);
1575
1576         case 3:
1577             if (!argv[2][1])
1578                 return cli_arg_help(cli, 1, NULL);
1579
1580         default:
1581             return CLI_OK;
1582         }
1583     }
1584
1585     if (argc != 2)
1586     {
1587         cli_print(cli, "Specify variable and value");
1588         return CLI_OK;
1589     }
1590
1591     for (i = 0; config_values[i].key; i++)
1592     {
1593         void *value = ((void *)config) + config_values[i].offset;
1594         if (strcmp(config_values[i].key, argv[0]) == 0)
1595         {
1596             // Found a value to set
1597             cli_print(cli, "Setting \"%s\" to \"%s\"", argv[0], argv[1]);
1598             switch (config_values[i].type)
1599             {
1600                 case STRING:
1601                     strncpy((char *)value, argv[1], config_values[i].size - 1);
1602                     break;
1603                 case INT:
1604                     *(int *)value = atoi(argv[1]);
1605                     break;
1606                 case UNSIGNED_LONG:
1607                     *(unsigned long *)value = atol(argv[1]);
1608                     break;
1609                 case SHORT:
1610                     *(short *)value = atoi(argv[1]);
1611                     break;
1612                 case IP:
1613                     *(unsigned *)value = inet_addr(argv[1]);
1614                     break;
1615                 case BOOL:
1616                     if (strcasecmp(argv[1], "yes") == 0 || strcasecmp(argv[1], "true") == 0 || strcasecmp(argv[1], "1") == 0)
1617                         *(int *)value = 1;
1618                     else
1619                         *(int *)value = 0;
1620                     break;
1621                 default:
1622                     cli_print(cli, "Unknown variable type");
1623                     break;
1624             }
1625             config->reload_config = 1;
1626             return CLI_OK;
1627         }
1628     }
1629
1630     cli_print(cli, "Unknown variable \"%s\"", argv[0]);
1631     return CLI_OK;
1632 }
1633
1634 int regular_stuff(struct cli_def *cli)
1635 {
1636     int i = debug_rb_tail;
1637     int reprompt = 0;
1638
1639 #ifdef RINGBUFFER
1640     while (i != ringbuffer->tail)
1641     {
1642         int show_message = 0;
1643
1644         if (*ringbuffer->buffer[i].message)
1645         {
1646             // Always show messages if we are doing general debug
1647             if (ringbuffer->buffer[i].level == 0 && debug_flags.critical) show_message = 1;
1648             if (ringbuffer->buffer[i].level == 1 && debug_flags.error) show_message = 1;
1649             if (ringbuffer->buffer[i].level == 2 && debug_flags.warning) show_message = 1;
1650             if (ringbuffer->buffer[i].level == 3 && debug_flags.info) show_message = 1;
1651             if (ringbuffer->buffer[i].level == 4 && debug_flags.calls) show_message = 1;
1652             if (ringbuffer->buffer[i].level == 5 && debug_flags.data) show_message = 1;
1653         }
1654
1655         if (show_message)
1656         {
1657             ipt address = htonl(ringbuffer->buffer[i].address);
1658             char *ipaddr;
1659             struct in_addr addr;
1660
1661             memcpy(&addr, &address, sizeof(ringbuffer->buffer[i].address));
1662             ipaddr = inet_ntoa(addr);
1663
1664             cli_print(cli, "\r%s-%s-%u-%u %s",
1665                     debug_levels[(int)ringbuffer->buffer[i].level],
1666                     ipaddr,
1667                     ringbuffer->buffer[i].tunnel,
1668                     ringbuffer->buffer[i].session,
1669                     ringbuffer->buffer[i].message);
1670
1671             reprompt = 1;
1672         }
1673
1674         if (++i == ringbuffer->tail) break;
1675         if (i == RINGBUFFER_SIZE) i = 0;
1676     }
1677
1678     debug_rb_tail = ringbuffer->tail;
1679     if (reprompt)
1680         cli_reprompt(cli);
1681 #endif
1682     return CLI_OK;
1683 }