scripts/unet-cli

   1 #!/usr/bin/env ucode
   2
   3 let fs = require("fs");
   4
   5 let script_dir = sourcepath(0, true);
   6 if (fs.basename(script_dir) == "scripts") {
   7         unet_tool = fs.dirname(script_dir) + "/unet-tool";
   8         if (!fs.access(unet_tool, "x")) {
   9                 warn("unet-tool missing\n");
  10                 exit(1);
  11         }
  12 } else {
  13         unet_tool = "unet-tool";
  14 }
  15
  16 args = {};
  17
  18 defaults = {
  19         port: 51830,
  20         pex_port: 51831,
  21         keepalive: 10,
  22 };
  23
  24 function usage() {
  25         warn("Usage: ",fs.basename(sourcepath())," [<flags>] <file> <command> [<args>] [<option>=<value> ...]\n",
  26              "\n",
  27              "Commands:\n",
  28              " - create:                                        Create a new network file\n",
  29              " - set-config:                                    Change network config parameters\n",
  30              " - add-host <name>:                               Add a host\n",
  31              " - add-ssh-host <name> <host>:                    Add a remote OpenWrt host via SSH\n",
  32              "                                          (<host> can contain SSH options as well)\n",
  33              " - set-host <name>:                               Change host settings\n",
  34              " - set-ssh-host <name> <host>:                    Update local and remote host settings\n",
  35              " - add-service <name>:                            Add a service\n",
  36              " - set-service <name>:                            Change service settings\n",
  37              " - sign                                           Sign network data\n",
  38              "\n",
  39              "Flags:\n",
  40              " -p:                                              Print modified JSON instead of updating file\n",
  41              "\n",
  42              "Options:\n",
  43              " - config options (create, set-config):\n",
  44              "  port=<val>                              set tunnel port (default: ", defaults.port, ")\n",
  45              "  pex_port=<val>                          set peer-exchange port (default: ", defaults.pex_port, ")\n",
  46              "  keepalive=<val>                         set keepalive interval (seconds, 0: off, default: ", defaults.keepalive,")\n",
  47              " host options (add-host, add-ssh-host, set-host):\n",
  48              "  key=<val>                               set host public key (required for add-host)\n",
  49              "  port=<val>                              set host tunnel port number\n",
  50              "  groups=[+|-]<val>[,<val>...]            set/add/remove groups that the host is a member of\n",
  51              "  ipaddr=[+|-]<val>[,<val>...]            set/add/remove host ip addresses\n",
  52              "  subnet=[+|-]<val>[,<val>...]            set/add/remove host announced subnets\n",
  53              "  endpoint=<val>                          set host endpoint address\n",
  54              " ssh host options (add-ssh-host, set-ssh-host)\n",
  55              "  auth_key=<key>                          use <key> as public auth key on the remote host\n",
  56              "  priv_key=<key>                          use <key> as private host key on the remote host (default: generate a new key)\n",
  57              "  interface=<name>                        use <name> as interface in /etc/config/network on the remote host\n",
  58              "  connect=<val>[,<val>...]                set IP addresses that the host will contact for network updates\n",
  59              "  tunnels=<ifname>:<service>[,...]        set active tunnel devices\n",
  60              " service options (add-service, set-service):\n",
  61              "  type=<val>                              set service type (required for add-service)\n",
  62              "  members=[+|-]<val>[,<val>...]           set/add/remove service member hosts/groups\n",
  63              " vxlan service options (add-service, set-service):\n",
  64              "  id=<val>                                set VXLAN ID\n",
  65              "  port=<val>                              set VXLAN port\n",
  66              "  mtu=<val>                               set VXLAN device MTU\n",
  67              "  forward_ports=[+|-]<val>[,<val>...]     set members allowed to receive broadcast/multicast/unknown-unicast\n",
  68              " sign options:\n",
  69              "  upload=<ip>[,<ip>...]                   upload signed file to hosts\n",
  70              "\n");
  71         return 1;
  72 }
  73
  74 if (length(ARGV) < 2)
  75         exit(usage());
  76
  77 file = shift(ARGV);
  78 command = shift(ARGV);
  79
  80 field_types = {
  81         int: function(object, name, val) {
  82                 object[name] = int(val);
  83         },
  84         string: function(object, name, val) {
  85                 object[name] = val;
  86         },
  87         array: function(object, name, val) {
  88                 let op = substr(val, 0, 1);
  89
  90                 if (op == "+" || op == "-") {
  91                         val = substr(val, 1);
  92                         object[name] ??= [];
  93                 } else {
  94                         op = "=";
  95                         object[name] = [];
  96                 }
  97
  98                 let vals = split(val, ",");
  99                 for (val in vals) {
 100                         object[name] = filter(object[name], function(v) {
 101                                 return v != val
 102                         });
 103                         if (op != "-")
 104                                 push(object[name], val);
 105                 }
 106
 107                 if (!length(object[name]))
 108                         delete object[name];
 109         },
 110 };
 111
 112 service_field_types = {
 113         vxlan: {
 114                 id: "int",
 115                 port: "int",
 116                 mtu: "int",
 117                 forward_ports: "array",
 118         },
 119 };
 120
 121 ssh_script = '
 122
 123 set_list() {
 124         local field="$1"
 125         local val="$2"
 126
 127         first=1
 128         for cur in $val; do
 129                 if [ -n "$first" ]; then
 130                         cmd=set
 131                 else
 132                         cmd=add_list
 133                 fi
 134                 uci $cmd "network.$INTERFACE.$field=$cur"
 135                 first=
 136         done
 137 }
 138 set_interface_attrs() {
 139         [ -n "$AUTH_KEY" ] && uci set "network.$INTERFACE.auth_key=$AUTH_KEY"
 140         set_list connect "$CONNECT"
 141         set_list tunnels "$TUNNELS"
 142 }
 143
 144 check_interface() {
 145         [ "$(uci -q get "network.$INTERFACE")" = "interface" -a "$(uci -q get "network.$INTERFACE.proto")" = "unet" ] && return 0
 146         uci batch <<EOF
 147 set network.$INTERFACE=interface
 148 set network.$INTERFACE.proto=unet
 149 set network.$INTERFACE.device=$INTERFACE
 150 set network.$INTERFACE.domain=unet
 151 EOF
 152 }
 153
 154 check_interface_key() {
 155         key="$(uci -q get "network.$INTERFACE.key" | unet-tool -q -H -K -)"
 156         [ -n "$key" ] || {
 157                 uci set "network.$INTERFACE.key=$(unet-tool -G)"
 158                 key="$(uci get "network.$INTERFACE.key" | unet-tool -H -K -)"
 159         }
 160         echo "key=$key"
 161 }
 162
 163 check_interface
 164 check_interface_key
 165 set_interface_attrs
 166 uci commit
 167 reload_config
 168 ';
 169
 170 args = {};
 171 print_only = false;
 172
 173 function fetch_args() {
 174         for (arg in ARGV) {
 175                 vals = match(arg, /^(.[[:alnum:]_-]*)=(.*)$/);
 176                 if (!vals) {
 177                         warn("Invalid argument: ", arg, "\n");
 178                         exit(1);
 179                 }
 180                 args[vals[1]] = vals[2]
 181         }
 182 }
 183
 184 function set_field(typename, object, name, val) {
 185         if (!field_types[typename]) {
 186                 warn("Invalid type ", type, "\n");
 187                 return;
 188         }
 189
 190         if (type(val) != "string")
 191                 return;
 192
 193         if (val == "") {
 194                 delete object[name];
 195                 return;
 196         }
 197
 198         field_types[typename](object, name, val);
 199 }
 200
 201 function set_fields(object, list) {
 202         for (f in list)
 203                 set_field(list[f], object, f, args[f]);
 204 }
 205
 206 function set_host(name) {
 207         let host = net_data.hosts[name];
 208
 209         set_fields(host, {
 210                 key: "string",
 211                 endpoint: "string",
 212                 port: "int",
 213                 ipaddr: "array",
 214                 subnet: "array",
 215                 groups: "array",
 216         });
 217 }
 218
 219 function set_service(name) {
 220         let service = net_data.services[name];
 221
 222         set_fields(service, {
 223                 type: "string",
 224                 members: "array",
 225         });
 226
 227         if (service_field_types[service.type])
 228                 set_fields(service.config, service_field_types[service.type]);
 229 }
 230
 231 function sync_ssh_host(host) {
 232         let interface = args.interface ?? "unet";
 233         let connect = replace(args.connect ?? "", ",", " ");
 234         let auth_key = args.auth_key;
 235         let tunnels = replace(replace(args.tunnels ?? "", ",", " "), ":", "=");
 236
 237         if (!auth_key) {
 238                 let fh = fs.mkstemp();
 239                 system(unet_tool + " -q -P -K " + file + ".key >&" + fh.fileno());
 240                 fh.seek();
 241                 auth_key = fh.read("line");
 242                 fh.close();
 243                 auth_key = replace(auth_key, "\n", "");
 244                 if (auth_key == "") {
 245                         warn("Could not read auth key\n");
 246                         exit(1);
 247                 }
 248         }
 249
 250         let fh = fs.mkstemp();
 251         fh.write("INTERFACE='" + interface + "'\n");
 252         fh.write("CONNECT='" + connect + "'\n");
 253         fh.write("AUTH_KEY='" + auth_key + "'\n");
 254         fh.write("TUNNELS='" + tunnels + "'\n");
 255         fh.write(ssh_script);
 256         fh.flush();
 257         fh.seek();
 258
 259         fh2 = fs.mkstemp();
 260         system(sprintf("ssh "+host+" sh <&%d >&%d", fh.fileno(), fh2.fileno()));
 261         fh.close();
 262
 263         data = {};
 264
 265         fh2.seek();
 266         while (line = fh2.read("line")) {
 267                 let vals = match(line, /^(.[[:alnum:]_-]*)=(.*)\n$/);
 268                 if (!vals) {
 269                         warn("Invalid argument: ", arg, "\n");
 270                         exit(1);
 271                 }
 272                 data[vals[1]] = vals[2]
 273         }
 274         fh2.close();
 275
 276         if (!data.key) {
 277                 warn("Could not read host key from SSH host\n");
 278                 exit(1);
 279         }
 280
 281         args.key = data.key;
 282 }
 283
 284 while (substr(ARGV[0], 0, 1) == "-") {
 285         opt = shift(ARGV);
 286         if (opt == "--")
 287                 break;
 288         else if (opt == "-p")
 289                 print_only = true;
 290         else
 291                 exit(usage());
 292 }
 293
 294 if (command == "add-host" || command == "set-host" ||
 295     command == "add-ssh-host" || command == "set-ssh-host") {
 296         hostname = shift(ARGV);
 297         if (!hostname) {
 298                 warn("Missing host name argument\n");
 299                 exit(1);
 300         }
 301 }
 302
 303 if (command == "add-ssh-host" || command == "set-ssh-host") {
 304         ssh_host = shift(ARGV);
 305         if (!ssh_host) {
 306                 warn("Missing SSH host/user argument\n");
 307                 exit(1);
 308         }
 309 }
 310
 311 if (command == "add-service" || command == "set-service") {
 312         servicename = shift(ARGV);
 313         if (!servicename) {
 314                 warn("Missing service name argument\n");
 315                 exit(1);
 316         }
 317 }
 318
 319 fetch_args();
 320
 321 if (command == "add-ssh-host" || command == "set-ssh-host") {
 322         sync_ssh_host(ssh_host);
 323         command = replace(command, "ssh-", "");
 324 }
 325
 326 if (command == "create") {
 327         net_data = {
 328                 config: {},
 329                 hosts: {},
 330                 services: {}
 331         };
 332 } else {
 333         fh = fs.open(file);
 334         if (!fh) {
 335                 warn("Could not open input file ", file, "\n");
 336                 exit(1);
 337         }
 338         try {
 339                 net_data = json(fh);
 340         } catch(e) {
 341                 warn("Could not parse input file ", file, "\n");
 342                 exit(1);
 343         }
 344 }
 345
 346 if (command == "create") {
 347         for (key in keys(defaults))
 348                 args[key] ??= "" + defaults[key];
 349         if (!fs.access(file + ".key"))
 350                 system(unet_tool + " -G > " + file + ".key");
 351 }
 352
 353 if (command == "sign") {
 354         ret = system(unet_tool + " -S -K " + file + ".key -o " + file + ".bin " + file);
 355         if (ret != 0)
 356                 exit(ret);
 357
 358         if (args.upload) {
 359                 hosts = split(args.upload, ",");
 360                 for (host in hosts) {
 361                         warn("Uploading " + file + ".bin to " + host + "\n");
 362                         ret = system(unet_tool + " -U " + host + " -K "+ file + ".key " + file + ".bin");
 363                         if (ret)
 364                                 warn("Upload failed\n");
 365                 }
 366         }
 367         exit(0);
 368 }
 369
 370 if (command == "create" || command == "set-config") {
 371         set_fields(net_data.config, {
 372                 port: "int",
 373                 keepalive: "int",
 374         });
 375         set_field("int", net_data.config, "peer-exchange-port", args.pex_port);
 376 } else if (command == "add-host") {
 377         net_data.hosts[hostname] = {};
 378         if (!args.key) {
 379                 warn("Missing host key\n");
 380                 exit(1);
 381         }
 382         set_host(hostname);
 383 } else if (command == "set-host") {
 384         if (!net_data.hosts[hostname]) {
 385                 warn("Host '", hostname, "' does not exist\n");
 386                 exit(1);
 387         }
 388         set_host(hostname);
 389 } else if (command == "add-service") {
 390         net_data.services[servicename] = {
 391                 config: {},
 392                 members: [],
 393         };
 394         if (!args.type) {
 395                 warn("Missing service type\n");
 396                 exit(1);
 397         }
 398         set_service(servicename);
 399 } else if (command == "set-service") {
 400         if (!net_data.services[servicename]) {
 401                 warn("Service '", servicename, "' does not exist\n");
 402                 exit(1);
 403         }
 404         set_service(servicename);
 405 } else {
 406         warn("Unknown command\n");
 407         exit(1);
 408 }
 409
 410 net_data_json = sprintf("%.J\n", net_data);
 411 if (print_only)
 412         print(net_data_json);
 413 else
 414         fs.writefile(file, net_data_json);