/*
- * Copyright (c) 2009 Nicira Networks.
+ * Copyright (c) 2009, 2010 Nicira Networks.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include "jsonrpc.h"
+#include <assert.h>
#include <errno.h>
#include "byteq.h"
return;
}
+ stream_run(rpc->stream);
while (!queue_is_empty(&rpc->output)) {
struct ofpbuf *buf = rpc->output.head;
int retval;
void
jsonrpc_wait(struct jsonrpc *rpc)
{
- if (!rpc->status && !queue_is_empty(&rpc->output)) {
- stream_send_wait(rpc->stream);
+ if (!rpc->status) {
+ stream_run_wait(rpc->stream);
+ if (!queue_is_empty(&rpc->output)) {
+ stream_send_wait(rpc->stream);
+ }
}
}
}
if (msg->params) {
ds_put_cstr(&s, ", params=");
- ds_put_and_free_cstr(&s, json_to_string(msg->params, 0));
+ json_to_ds(msg->params, 0, &s);
}
if (msg->result) {
ds_put_cstr(&s, ", result=");
- ds_put_and_free_cstr(&s, json_to_string(msg->result, 0));
+ json_to_ds(msg->result, 0, &s);
}
if (msg->error) {
ds_put_cstr(&s, ", error=");
- ds_put_and_free_cstr(&s, json_to_string(msg->error, 0));
+ json_to_ds(msg->error, 0, &s);
}
if (msg->id) {
ds_put_cstr(&s, ", id=");
- ds_put_and_free_cstr(&s, json_to_string(msg->id, 0));
+ json_to_ds(msg->id, 0, &s);
}
VLOG_DBG("%s: %s %s%s", rpc->name, title,
jsonrpc_msg_type_to_string(msg->type), ds_cstr(&s));
}
}
+/* Always takes ownership of 'msg', regardless of success. */
int
jsonrpc_send(struct jsonrpc *rpc, struct jsonrpc_msg *msg)
{
}
}
+/* Always takes ownership of 'msg', regardless of success. */
int
jsonrpc_send_block(struct jsonrpc *rpc, struct jsonrpc_msg *msg)
{
return error;
}
- while (!queue_is_empty(&rpc->output) && !rpc->status) {
+ for (;;) {
jsonrpc_run(rpc);
+ if (queue_is_empty(&rpc->output) || rpc->status) {
+ return rpc->status;
+ }
jsonrpc_wait(rpc);
poll_block();
}
- return rpc->status;
}
int
}
}
+/* 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 *
-jsonrpc_create_request(const char *method, struct json *params)
+jsonrpc_create_request(const char *method, struct json *params,
+ struct json **idp)
{
- return jsonrpc_create(JSONRPC_REQUEST, method, params, NULL, NULL,
- jsonrpc_create_id());
+ struct json *id = jsonrpc_create_id();
+ if (idp) {
+ *idp = json_clone(id);
+ }
+ return jsonrpc_create(JSONRPC_REQUEST, method, params, NULL, NULL, id);
}
struct jsonrpc_msg *
unsigned int seqno;
};
+/* Creates and returns a jsonrpc_session that connects and reconnects, with
+ * back-off, to 'name', which should be a string acceptable to
+ * stream_open(). */
struct jsonrpc_session *
jsonrpc_session_open(const char *name)
{
return s;
}
+/* Creates and returns a jsonrpc_session that is initially connected to
+ * 'jsonrpc'. If the connection is dropped, it will not be reconnected. */
+struct jsonrpc_session *
+jsonrpc_session_open_unreliably(struct jsonrpc *jsonrpc)
+{
+ struct jsonrpc_session *s;
+
+ s = xmalloc(sizeof *s);
+ s->reconnect = reconnect_create(time_msec());
+ reconnect_set_name(s->reconnect, jsonrpc_get_name(jsonrpc));
+ reconnect_set_max_tries(s->reconnect, 0);
+ reconnect_connected(s->reconnect, time_msec());
+ s->rpc = jsonrpc;
+ s->stream = NULL;
+ s->seqno = 0;
+
+ return s;
+}
+
void
jsonrpc_session_close(struct jsonrpc_session *s)
{
if (s) {
jsonrpc_close(s->rpc);
reconnect_destroy(s->reconnect);
+ stream_close(s->stream);
free(s);
}
}
static void
jsonrpc_session_disconnect(struct jsonrpc_session *s)
{
- reconnect_disconnected(s->reconnect, time_msec(), 0);
if (s->rpc) {
jsonrpc_error(s->rpc, EOF);
jsonrpc_close(s->rpc);
jsonrpc_run(s->rpc);
error = jsonrpc_get_status(s->rpc);
if (error) {
+ reconnect_disconnected(s->reconnect, time_msec(), 0);
jsonrpc_session_disconnect(s);
}
} else if (s->stream) {
- int error = stream_connect(s->stream);
+ int error;
+
+ stream_run(s->stream);
+ error = stream_connect(s->stream);
if (!error) {
reconnect_connected(s->reconnect, time_msec());
s->rpc = jsonrpc_open(s->stream);
break;
case RECONNECT_DISCONNECT:
+ reconnect_disconnected(s->reconnect, time_msec(), 0);
jsonrpc_session_disconnect(s);
break;
struct jsonrpc_msg *request;
params = json_array_create_empty();
- request = jsonrpc_create_request("echo", params);
+ request = jsonrpc_create_request("echo", params, NULL);
json_destroy(request->id);
request->id = json_string_create("echo");
jsonrpc_send(s->rpc, request);
if (s->rpc) {
jsonrpc_wait(s->rpc);
} else if (s->stream) {
+ stream_run_wait(s->stream);
stream_connect_wait(s->stream);
}
reconnect_wait(s->reconnect, time_msec());
return reconnect_get_name(s->reconnect);
}
+/* Always takes ownership of 'msg', regardless of success. */
int
jsonrpc_session_send(struct jsonrpc_session *s, struct jsonrpc_msg *msg)
{
- return s->rpc ? jsonrpc_send(s->rpc, msg) : ENOTCONN;
+ if (s->rpc) {
+ return jsonrpc_send(s->rpc, msg);
+ } else {
+ jsonrpc_msg_destroy(msg);
+ return ENOTCONN;
+ }
}
struct jsonrpc_msg *
jsonrpc_session_recv(struct jsonrpc_session *s)
{
- struct jsonrpc_msg *msg = NULL;
if (s->rpc) {
+ struct jsonrpc_msg *msg;
jsonrpc_recv(s->rpc, &msg);
if (msg) {
reconnect_received(s->reconnect, time_msec());
+ if (msg->type == JSONRPC_REQUEST && !strcmp(msg->method, "echo")) {
+ /* Echo request. Send reply. */
+ struct jsonrpc_msg *reply;
+
+ reply = jsonrpc_create_reply(json_clone(msg->params), msg->id);
+ jsonrpc_session_send(s, reply);
+ } else if (msg->type == JSONRPC_REPLY
+ && msg->id && msg->id->type == JSON_STRING
+ && !strcmp(msg->id->u.string, "echo")) {
+ /* It's a reply to our echo request. Suppress it. */
+ } else {
+ return msg;
+ }
+ jsonrpc_msg_destroy(msg);
}
}
- return msg;
+ return NULL;
}
void
}
}
+bool
+jsonrpc_session_is_alive(const struct jsonrpc_session *s)
+{
+ return s->rpc || s->stream || reconnect_get_max_tries(s->reconnect);
+}
+
bool
jsonrpc_session_is_connected(const struct jsonrpc_session *s)
{
git://git.onelab.eu / sliver-openvswitch.git / blobdiff