tests/test-jsonrpc.c

   1 /*
   2  * Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <config.h>
  18
  19 #include "jsonrpc.h"
  20
  21 #include <errno.h>
  22 #include <fcntl.h>
  23 #include <getopt.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26
  27 #include "command-line.h"
  28 #include "daemon.h"
  29 #include "json.h"
  30 #include "poll-loop.h"
  31 #include "stream-ssl.h"
  32 #include "stream.h"
  33 #include "timeval.h"
  34 #include "util.h"
  35 #include "vlog.h"
  36
  37 static struct command all_commands[];
  38
  39 static void usage(void) NO_RETURN;
  40 static void parse_options(int argc, char *argv[]);
  41
  42 int
  43 main(int argc, char *argv[])
  44 {
  45     proctitle_init(argc, argv);
  46     set_program_name(argv[0]);
  47     parse_options(argc, argv);
  48     run_command(argc - optind, argv + optind, all_commands);
  49     return 0;
  50 }
  51
  52 static void
  53 parse_options(int argc, char *argv[])
  54 {
  55     enum {
  56         OPT_BOOTSTRAP_CA_CERT = UCHAR_MAX + 1,
  57         DAEMON_OPTION_ENUMS
  58     };
  59     static const struct option long_options[] = {
  60         {"verbose", optional_argument, NULL, 'v'},
  61         {"help", no_argument, NULL, 'h'},
  62         DAEMON_LONG_OPTIONS,
  63         {"bootstrap-ca-cert", required_argument, NULL, OPT_BOOTSTRAP_CA_CERT},
  64         STREAM_SSL_LONG_OPTIONS,
  65         {NULL, 0, NULL, 0},
  66     };
  67     char *short_options = long_options_to_short_options(long_options);
  68
  69     for (;;) {
  70         int c = getopt_long(argc, argv, short_options, long_options, NULL);
  71         if (c == -1) {
  72             break;
  73         }
  74
  75         switch (c) {
  76         case 'h':
  77             usage();
  78
  79         case 'v':
  80             vlog_set_verbosity(optarg);
  81             break;
  82
  83         DAEMON_OPTION_HANDLERS
  84
  85         STREAM_SSL_OPTION_HANDLERS
  86
  87         case OPT_BOOTSTRAP_CA_CERT:
  88             stream_ssl_set_ca_cert_file(optarg, true);
  89             break;
  90
  91         case '?':
  92             exit(EXIT_FAILURE);
  93
  94         default:
  95             abort();
  96         }
  97     }
  98     free(short_options);
  99 }
 100
 101 static void
 102 usage(void)
 103 {
 104     printf("%s: JSON-RPC test utility\n"
 105            "usage: %s [OPTIONS] COMMAND [ARG...]\n"
 106            "  listen LOCAL             listen for connections on LOCAL\n"
 107            "  request REMOTE METHOD PARAMS   send request, print reply\n"
 108            "  notify REMOTE METHOD PARAMS  send notification and exit\n",
 109            program_name, program_name);
 110     stream_usage("JSON-RPC", true, true, true);
 111     daemon_usage();
 112     vlog_usage();
 113     printf("\nOther options:\n"
 114            "  -h, --help                  display this help message\n");
 115     exit(EXIT_SUCCESS);
 116 }
 117 \f
 118 /* Command helper functions. */
 119
 120 static struct json *
 121 parse_json(const char *s)
 122 {
 123     struct json *json = json_from_string(s);
 124     if (json->type == JSON_STRING) {
 125         ovs_fatal(0, "\"%s\": %s", s, json->u.string);
 126     }
 127     return json;
 128 }
 129
 130 static void
 131 print_and_free_json(struct json *json)
 132 {
 133     char *string = json_to_string(json, JSSF_SORT);
 134     json_destroy(json);
 135     puts(string);
 136     free(string);
 137 }
 138 \f
 139 /* Command implementations. */
 140
 141 static int
 142 handle_rpc(struct jsonrpc *rpc, struct jsonrpc_msg *msg, bool *done)
 143 {
 144     if (msg->type == JSONRPC_REQUEST) {
 145         struct jsonrpc_msg *reply = NULL;
 146         if (!strcmp(msg->method, "echo")) {
 147             reply = jsonrpc_create_reply(json_clone(msg->params), msg->id);
 148         } else {
 149             struct json *error = json_object_create();
 150             json_object_put_string(error, "error", "unknown method");
 151             reply = jsonrpc_create_error(error, msg->id);
 152             ovs_error(0, "unknown request %s", msg->method);
 153         }
 154         jsonrpc_send(rpc, reply);
 155         return 0;
 156     } else if (msg->type == JSONRPC_NOTIFY) {
 157         if (!strcmp(msg->method, "shutdown")) {
 158             *done = true;
 159             return 0;
 160         } else {
 161             ovs_error(0, "unknown notification %s", msg->method);
 162             return ENOTTY;
 163         }
 164     } else {
 165         ovs_error(0, "unsolicited JSON-RPC reply or error");
 166         return EPROTO;
 167     }
 168 }
 169
 170 static void
 171 do_listen(int argc OVS_UNUSED, char *argv[])
 172 {
 173     struct pstream *pstream;
 174     struct jsonrpc **rpcs;
 175     size_t n_rpcs, allocated_rpcs;
 176     bool done;
 177     int error;
 178
 179     error = jsonrpc_pstream_open(argv[1], &pstream, DSCP_DEFAULT);
 180     if (error) {
 181         ovs_fatal(error, "could not listen on \"%s\"", argv[1]);
 182     }
 183
 184     daemonize();
 185
 186     rpcs = NULL;
 187     n_rpcs = allocated_rpcs = 0;
 188     done = false;
 189     for (;;) {
 190         struct stream *stream;
 191         size_t i;
 192
 193         /* Accept new connections. */
 194         error = pstream_accept(pstream, &stream);
 195         if (!error) {
 196             if (n_rpcs >= allocated_rpcs) {
 197                 rpcs = x2nrealloc(rpcs, &allocated_rpcs, sizeof *rpcs);
 198             }
 199             rpcs[n_rpcs++] = jsonrpc_open(stream);
 200         } else if (error != EAGAIN) {
 201             ovs_fatal(error, "pstream_accept failed");
 202         }
 203
 204         /* Service existing connections. */
 205         for (i = 0; i < n_rpcs; ) {
 206             struct jsonrpc *rpc = rpcs[i];
 207             struct jsonrpc_msg *msg;
 208
 209             jsonrpc_run(rpc);
 210             if (!jsonrpc_get_backlog(rpc)) {
 211                 error = jsonrpc_recv(rpc, &msg);
 212                 if (!error) {
 213                     error = handle_rpc(rpc, msg, &done);
 214                     jsonrpc_msg_destroy(msg);
 215                 } else if (error == EAGAIN) {
 216                     error = 0;
 217                 }
 218             }
 219
 220             if (!error) {
 221                 error = jsonrpc_get_status(rpc);
 222             }
 223             if (error) {
 224                 jsonrpc_close(rpc);
 225                 ovs_error(error, "connection closed");
 226                 memmove(&rpcs[i], &rpcs[i + 1],
 227                         (n_rpcs - i - 1) * sizeof *rpcs);
 228                 n_rpcs--;
 229             } else {
 230                 i++;
 231             }
 232         }
 233
 234         /* Wait for something to do. */
 235         if (done && !n_rpcs) {
 236             break;
 237         }
 238         pstream_wait(pstream);
 239         for (i = 0; i < n_rpcs; i++) {
 240             struct jsonrpc *rpc = rpcs[i];
 241
 242             jsonrpc_wait(rpc);
 243             if (!jsonrpc_get_backlog(rpc)) {
 244                 jsonrpc_recv_wait(rpc);
 245             }
 246         }
 247         poll_block();
 248     }
 249     free(rpcs);
 250     pstream_close(pstream);
 251 }
 252
 253 static void
 254 do_request(int argc OVS_UNUSED, char *argv[])
 255 {
 256     struct jsonrpc_msg *msg;
 257     struct jsonrpc *rpc;
 258     struct json *params;
 259     struct stream *stream;
 260     const char *method;
 261     char *string;
 262     int error;
 263
 264     method = argv[2];
 265     params = parse_json(argv[3]);
 266     msg = jsonrpc_create_request(method, params, NULL);
 267     string = jsonrpc_msg_is_valid(msg);
 268     if (string) {
 269         ovs_fatal(0, "not a valid JSON-RPC request: %s", string);
 270     }
 271
 272     error = stream_open_block(jsonrpc_stream_open(argv[1], &stream,
 273                               DSCP_DEFAULT), &stream);
 274     if (error) {
 275         ovs_fatal(error, "could not open \"%s\"", argv[1]);
 276     }
 277     rpc = jsonrpc_open(stream);
 278
 279     error = jsonrpc_send(rpc, msg);
 280     if (error) {
 281         ovs_fatal(error, "could not send request");
 282     }
 283
 284     error = jsonrpc_recv_block(rpc, &msg);
 285     if (error) {
 286         ovs_fatal(error, "error waiting for reply");
 287     }
 288     print_and_free_json(jsonrpc_msg_to_json(msg));
 289
 290     jsonrpc_close(rpc);
 291 }
 292
 293 static void
 294 do_notify(int argc OVS_UNUSED, char *argv[])
 295 {
 296     struct jsonrpc_msg *msg;
 297     struct jsonrpc *rpc;
 298     struct json *params;
 299     struct stream *stream;
 300     const char *method;
 301     char *string;
 302     int error;
 303
 304     method = argv[2];
 305     params = parse_json(argv[3]);
 306     msg = jsonrpc_create_notify(method, params);
 307     string = jsonrpc_msg_is_valid(msg);
 308     if (string) {
 309         ovs_fatal(0, "not a JSON RPC-valid notification: %s", string);
 310     }
 311
 312     error = stream_open_block(jsonrpc_stream_open(argv[1], &stream,
 313                               DSCP_DEFAULT), &stream);
 314     if (error) {
 315         ovs_fatal(error, "could not open \"%s\"", argv[1]);
 316     }
 317     rpc = jsonrpc_open(stream);
 318
 319     error = jsonrpc_send_block(rpc, msg);
 320     if (error) {
 321         ovs_fatal(error, "could not send notification");
 322     }
 323     jsonrpc_close(rpc);
 324 }
 325
 326 static void
 327 do_help(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 328 {
 329     usage();
 330 }
 331
 332 static struct command all_commands[] = {
 333     { "listen", 1, 1, do_listen },
 334     { "request", 3, 3, do_request },
 335     { "notify", 3, 3, do_notify },
 336     { "help", 0, INT_MAX, do_help },
 337     { NULL, 0, 0, NULL },
 338 };