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