mirror of
https://github.com/openvswitch/ovs
synced 2025-10-29 15:28:56 +00:00
991559357f
These initial bindings pass a few hundred of the corresponding tests for C implementations of various bits of the Open vSwitch library API. The poorest part of them is actually the Python IDL interface in ovs.db.idl, which has not received enough attention yet. It appears to work, but it doesn't yet support writes (transactions) and it is difficult to use. I hope to improve it as it becomes clear what semantics Python applications actually want from an IDL.
340 lines
8.4 KiB
C
340 lines
8.4 KiB
C
/*
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* Copyright (c) 2009, 2010 Nicira Networks.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <config.h>
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#include "jsonrpc.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "command-line.h"
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#include "daemon.h"
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#include "json.h"
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#include "poll-loop.h"
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#include "stream-ssl.h"
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#include "stream.h"
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#include "timeval.h"
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#include "util.h"
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#include "vlog.h"
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static struct command all_commands[];
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static void usage(void) NO_RETURN;
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static void parse_options(int argc, char *argv[]);
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int
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main(int argc, char *argv[])
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{
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proctitle_init(argc, argv);
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set_program_name(argv[0]);
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parse_options(argc, argv);
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run_command(argc - optind, argv + optind, all_commands);
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return 0;
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}
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static void
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parse_options(int argc, char *argv[])
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{
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enum {
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OPT_BOOTSTRAP_CA_CERT = UCHAR_MAX + 1
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};
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static struct option long_options[] = {
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{"verbose", optional_argument, 0, 'v'},
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{"help", no_argument, 0, 'h'},
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DAEMON_LONG_OPTIONS,
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#ifdef HAVE_OPENSSL
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{"bootstrap-ca-cert", required_argument, 0, OPT_BOOTSTRAP_CA_CERT},
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STREAM_SSL_LONG_OPTIONS
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#endif
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{0, 0, 0, 0},
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};
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char *short_options = long_options_to_short_options(long_options);
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for (;;) {
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int c = getopt_long(argc, argv, short_options, long_options, NULL);
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if (c == -1) {
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break;
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}
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switch (c) {
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case 'h':
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usage();
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case 'v':
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vlog_set_verbosity(optarg);
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break;
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DAEMON_OPTION_HANDLERS
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#ifdef HAVE_OPENSSL
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STREAM_SSL_OPTION_HANDLERS
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case OPT_BOOTSTRAP_CA_CERT:
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stream_ssl_set_ca_cert_file(optarg, true);
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break;
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#endif
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case '?':
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exit(EXIT_FAILURE);
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default:
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abort();
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}
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}
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free(short_options);
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}
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static void
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usage(void)
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{
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printf("%s: JSON-RPC test utility\n"
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"usage: %s [OPTIONS] COMMAND [ARG...]\n"
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" listen LOCAL listen for connections on LOCAL\n"
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" request REMOTE METHOD PARAMS send request, print reply\n"
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" notify REMOTE METHOD PARAMS send notification and exit\n",
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program_name, program_name);
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stream_usage("JSON-RPC", true, true, true);
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daemon_usage();
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vlog_usage();
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printf("\nOther options:\n"
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" -h, --help display this help message\n");
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exit(EXIT_SUCCESS);
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}
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/* Command helper functions. */
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static struct json *
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parse_json(const char *s)
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{
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struct json *json = json_from_string(s);
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if (json->type == JSON_STRING) {
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ovs_fatal(0, "\"%s\": %s", s, json->u.string);
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}
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return json;
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}
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static void
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print_and_free_json(struct json *json)
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{
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char *string = json_to_string(json, JSSF_SORT);
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json_destroy(json);
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puts(string);
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free(string);
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}
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/* Command implementations. */
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static void
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handle_rpc(struct jsonrpc *rpc, struct jsonrpc_msg *msg, bool *done)
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{
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struct jsonrpc_msg *reply = NULL;
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if (msg->type == JSONRPC_REQUEST) {
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if (!strcmp(msg->method, "echo")) {
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reply = jsonrpc_create_reply(json_clone(msg->params), msg->id);
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} else {
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struct json *error = json_object_create();
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json_object_put_string(error, "error", "unknown method");
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reply = jsonrpc_create_error(error, msg->id);
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ovs_error(0, "unknown request %s", msg->method);
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}
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} else if (msg->type == JSONRPC_NOTIFY) {
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if (!strcmp(msg->method, "shutdown")) {
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*done = true;
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} else {
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jsonrpc_error(rpc, ENOTTY);
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ovs_error(0, "unknown notification %s", msg->method);
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}
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} else {
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jsonrpc_error(rpc, EPROTO);
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ovs_error(0, "unsolicited JSON-RPC reply or error");
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}
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if (reply) {
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jsonrpc_send(rpc, reply);
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}
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}
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static void
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do_listen(int argc OVS_UNUSED, char *argv[])
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{
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struct pstream *pstream;
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struct jsonrpc **rpcs;
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size_t n_rpcs, allocated_rpcs;
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bool done;
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int error;
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die_if_already_running();
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error = jsonrpc_pstream_open(argv[1], &pstream);
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if (error) {
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ovs_fatal(error, "could not listen on \"%s\"", argv[1]);
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}
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daemonize();
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rpcs = NULL;
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n_rpcs = allocated_rpcs = 0;
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done = false;
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for (;;) {
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struct stream *stream;
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size_t i;
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/* Accept new connections. */
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error = pstream_accept(pstream, &stream);
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if (!error) {
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if (n_rpcs >= allocated_rpcs) {
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rpcs = x2nrealloc(rpcs, &allocated_rpcs, sizeof *rpcs);
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}
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rpcs[n_rpcs++] = jsonrpc_open(stream);
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} else if (error != EAGAIN) {
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ovs_fatal(error, "pstream_accept failed");
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}
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/* Service existing connections. */
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for (i = 0; i < n_rpcs; ) {
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struct jsonrpc *rpc = rpcs[i];
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struct jsonrpc_msg *msg;
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jsonrpc_run(rpc);
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if (!jsonrpc_get_backlog(rpc)) {
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error = jsonrpc_recv(rpc, &msg);
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if (!error) {
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handle_rpc(rpc, msg, &done);
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jsonrpc_msg_destroy(msg);
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}
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}
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error = jsonrpc_get_status(rpc);
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if (error) {
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jsonrpc_close(rpc);
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ovs_error(error, "connection closed");
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memmove(&rpcs[i], &rpcs[i + 1],
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(n_rpcs - i - 1) * sizeof *rpcs);
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n_rpcs--;
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} else {
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i++;
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}
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}
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/* Wait for something to do. */
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if (done && !n_rpcs) {
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break;
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}
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pstream_wait(pstream);
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for (i = 0; i < n_rpcs; i++) {
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struct jsonrpc *rpc = rpcs[i];
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jsonrpc_wait(rpc);
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if (!jsonrpc_get_backlog(rpc)) {
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jsonrpc_recv_wait(rpc);
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}
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}
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poll_block();
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}
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free(rpcs);
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pstream_close(pstream);
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}
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static void
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do_request(int argc OVS_UNUSED, char *argv[])
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{
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struct jsonrpc_msg *msg;
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struct jsonrpc *rpc;
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struct json *params;
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struct stream *stream;
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const char *method;
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char *string;
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int error;
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method = argv[2];
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params = parse_json(argv[3]);
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msg = jsonrpc_create_request(method, params, NULL);
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string = jsonrpc_msg_is_valid(msg);
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if (string) {
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ovs_fatal(0, "not a valid JSON-RPC request: %s", string);
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}
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error = stream_open_block(jsonrpc_stream_open(argv[1], &stream), &stream);
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if (error) {
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ovs_fatal(error, "could not open \"%s\"", argv[1]);
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}
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rpc = jsonrpc_open(stream);
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error = jsonrpc_send(rpc, msg);
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if (error) {
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ovs_fatal(error, "could not send request");
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}
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error = jsonrpc_recv_block(rpc, &msg);
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if (error) {
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ovs_fatal(error, "error waiting for reply");
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}
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print_and_free_json(jsonrpc_msg_to_json(msg));
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jsonrpc_close(rpc);
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}
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static void
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do_notify(int argc OVS_UNUSED, char *argv[])
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{
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struct jsonrpc_msg *msg;
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struct jsonrpc *rpc;
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struct json *params;
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struct stream *stream;
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const char *method;
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char *string;
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int error;
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method = argv[2];
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params = parse_json(argv[3]);
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msg = jsonrpc_create_notify(method, params);
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string = jsonrpc_msg_is_valid(msg);
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if (string) {
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ovs_fatal(0, "not a JSON RPC-valid notification: %s", string);
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}
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error = stream_open_block(jsonrpc_stream_open(argv[1], &stream), &stream);
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if (error) {
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ovs_fatal(error, "could not open \"%s\"", argv[1]);
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}
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rpc = jsonrpc_open(stream);
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error = jsonrpc_send_block(rpc, msg);
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if (error) {
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ovs_fatal(error, "could not send notification");
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}
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jsonrpc_close(rpc);
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}
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static void
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do_help(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
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{
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usage();
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}
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static struct command all_commands[] = {
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{ "listen", 1, 1, do_listen },
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{ "request", 3, 3, do_request },
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{ "notify", 3, 3, do_notify },
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{ "help", 0, INT_MAX, do_help },
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{ NULL, 0, 0, NULL },
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};
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