/* Sends 'request' to 'rpc' then waits for a reply. The return value is 0 if
* successful, in which case '*replyp' is set to the reply, which the caller
* must eventually free with jsonrpc_msg_destroy(). Otherwise returns a status
* value (see jsonrpc_get_status()).
*
* Discards any message received on 'rpc' that is not a reply to 'request'
* (based on message id).
*
* Always takes ownership of 'request', regardless of success. */
int
jsonrpc_transact_block(struct jsonrpc *rpc, struct jsonrpc_msg *request,
struct jsonrpc_msg **replyp)
{
struct jsonrpc_msg *reply = NULL;
struct json *id;
int error;
id = json_clone(request->id);
error = jsonrpc_send_block(rpc, request);
if (!error) {
for (;;) {
error = jsonrpc_recv_block(rpc, &reply);
if (error) {
break;
}
if ((reply->type == JSONRPC_REPLY || reply->type == JSONRPC_ERROR)
&& json_equal(id, reply->id)) {
break;
}
jsonrpc_msg_destroy(reply);
}
}
*replyp = error ? NULL : reply;
json_destroy(id);
return error;
}
static void
do_request(struct ovs_cmdl_context *ctx)
{
struct jsonrpc_msg *msg;
struct jsonrpc *rpc;
struct json *params;
struct stream *stream;
const char *method;
char *string;
int error;
method = ctx->argv[2];
params = parse_json(ctx->argv[3]);
msg = jsonrpc_create_request(method, params, NULL);
string = jsonrpc_msg_is_valid(msg);
if (string) {
ovs_fatal(0, "not a valid JSON-RPC request: %s", string);
}
error = stream_open_block(jsonrpc_stream_open(ctx->argv[1], &stream,
DSCP_DEFAULT), &stream);
if (error) {
ovs_fatal(error, "could not open \"%s\"", ctx->argv[1]);
}
rpc = jsonrpc_open(stream);
error = jsonrpc_send(rpc, msg);
if (error) {
ovs_fatal(error, "could not send request");
}
error = jsonrpc_recv_block(rpc, &msg);
if (error) {
ovs_fatal(error, "error waiting for reply");
}
print_and_free_json(jsonrpc_msg_to_json(msg));
jsonrpc_close(rpc);
}