/* Performs periodic maintenance on 'rpc', such as flushing output buffers. */
void
jsonrpc_run(struct jsonrpc *rpc)
{
if (rpc->status) {
return;
}
stream_run(rpc->stream);
while (!list_is_empty(&rpc->output)) {
struct ofpbuf *buf = ofpbuf_from_list(rpc->output.next);
int retval;
retval = stream_send(rpc->stream, buf->data, buf->size);
if (retval >= 0) {
rpc->backlog -= retval;
ofpbuf_pull(buf, retval);
if (!buf->size) {
list_remove(&buf->list_node);
rpc->output_count--;
ofpbuf_delete(buf);
}
} else {
if (retval != -EAGAIN) {
VLOG_WARN_RL(&rl, "%s: send error: %s",
rpc->name, ovs_strerror(-retval));
jsonrpc_error(rpc, -retval);
}
break;
}
}
}
void appInit()
{
//Run Stream process
at_run();
navdata_run();
stream_run();
gAppAlive = 1;
}
/* Connects to a fake_pvconn with vconn_open(), accepts that connection and
* sends the 'out' bytes in 'out_size' to it (presumably an OFPT_HELLO
* message), then verifies that vconn_connect() reports
* 'expect_connect_error'. */
static void
test_send_hello(const char *type, const void *out, size_t out_size,
int expect_connect_error)
{
struct fake_pvconn fpv;
struct vconn *vconn;
bool read_hello, connected;
struct ofpbuf *msg;
struct stream *stream;
size_t n_sent;
fpv_create(type, &fpv);
CHECK_ERRNO(vconn_open(fpv.vconn_name, 0, DSCP_DEFAULT, &vconn), 0);
vconn_run(vconn);
stream = fpv_accept(&fpv);
fpv_destroy(&fpv);
n_sent = 0;
while (n_sent < out_size) {
int retval;
retval = stream_send(stream, (char *) out + n_sent, out_size - n_sent);
if (retval > 0) {
n_sent += retval;
} else if (retval == -EAGAIN) {
stream_run(stream);
vconn_run(vconn);
stream_recv_wait(stream);
vconn_connect_wait(vconn);
vconn_run_wait(vconn);
poll_block();
} else {
ovs_fatal(0, "stream_send returned unexpected value %d", retval);
}
}
read_hello = connected = false;
for (;;) {
if (!read_hello) {
struct ofp_header hello;
int retval = stream_recv(stream, &hello, sizeof hello);
if (retval == sizeof hello) {
enum ofpraw raw;
CHECK(hello.version, OFP13_VERSION);
CHECK(ofpraw_decode_partial(&raw, &hello, sizeof hello), 0);
CHECK(raw, OFPRAW_OFPT_HELLO);
CHECK(ntohs(hello.length), sizeof hello);
read_hello = true;
} else {
CHECK_ERRNO(retval, -EAGAIN);
}
}
vconn_run(vconn);
if (!connected) {
int error = vconn_connect(vconn);
if (error == expect_connect_error) {
if (!error) {
connected = true;
} else {
stream_close(stream);
vconn_close(vconn);
return;
}
} else {
CHECK_ERRNO(error, EAGAIN);
}
}
if (read_hello && connected) {
break;
}
vconn_run_wait(vconn);
if (!connected) {
vconn_connect_wait(vconn);
}
if (!read_hello) {
stream_recv_wait(stream);
}
poll_block();
}
stream_close(stream);
CHECK_ERRNO(vconn_recv_block(vconn, &msg), EOF);
vconn_close(vconn);
}
void
jsonrpc_session_run(struct jsonrpc_session *s)
{
if (s->pstream) {
struct stream *stream;
int error;
error = pstream_accept(s->pstream, &stream);
if (!error) {
if (s->rpc || s->stream) {
VLOG_INFO_RL(&rl,
"%s: new connection replacing active connection",
reconnect_get_name(s->reconnect));
jsonrpc_session_disconnect(s);
}
reconnect_connected(s->reconnect, time_msec());
s->rpc = jsonrpc_open(stream);
} else if (error != EAGAIN) {
reconnect_listen_error(s->reconnect, time_msec(), error);
pstream_close(s->pstream);
s->pstream = NULL;
}
}
if (s->rpc) {
size_t backlog;
int error;
backlog = jsonrpc_get_backlog(s->rpc);
jsonrpc_run(s->rpc);
if (jsonrpc_get_backlog(s->rpc) < backlog) {
/* Data previously caught in a queue was successfully sent (or
* there's an error, which we'll catch below.)
*
* We don't count data that is successfully sent immediately as
* activity, because there's a lot of queuing downstream from us,
* which means that we can push a lot of data into a connection
* that has stalled and won't ever recover.
*/
reconnect_activity(s->reconnect, time_msec());
}
error = jsonrpc_get_status(s->rpc);
if (error) {
reconnect_disconnected(s->reconnect, time_msec(), error);
jsonrpc_session_disconnect(s);
s->last_error = error;
}
} else if (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);
s->stream = NULL;
} else if (error != EAGAIN) {
reconnect_connect_failed(s->reconnect, time_msec(), error);
stream_close(s->stream);
s->stream = NULL;
s->last_error = error;
}
}
switch (reconnect_run(s->reconnect, time_msec())) {
case RECONNECT_CONNECT:
jsonrpc_session_connect(s);
break;
case RECONNECT_DISCONNECT:
reconnect_disconnected(s->reconnect, time_msec(), 0);
jsonrpc_session_disconnect(s);
break;
case RECONNECT_PROBE:
if (s->rpc) {
struct json *params;
struct jsonrpc_msg *request;
params = json_array_create_empty();
request = jsonrpc_create_request("echo", params, NULL);
json_destroy(request->id);
request->id = json_string_create("echo");
jsonrpc_send(s->rpc, request);
}
break;
}
}
void
jsonrpc_session_run(struct jsonrpc_session *s)
{
if (s->pstream) {
struct stream *stream;
int error;
error = pstream_accept(s->pstream, &stream);
if (!error) {
if (s->rpc || s->stream) {
VLOG_INFO_RL(&rl,
"%s: new connection replacing active connection",
reconnect_get_name(s->reconnect));
jsonrpc_session_disconnect(s);
}
reconnect_connected(s->reconnect, time_msec());
s->rpc = jsonrpc_open(stream);
} else if (error != EAGAIN) {
reconnect_listen_error(s->reconnect, time_msec(), error);
pstream_close(s->pstream);
s->pstream = NULL;
}
}
if (s->rpc) {
int error;
jsonrpc_run(s->rpc);
error = jsonrpc_get_status(s->rpc);
if (error) {
reconnect_disconnected(s->reconnect, time_msec(), error);
jsonrpc_session_disconnect(s);
}
} else if (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);
s->stream = NULL;
} else if (error != EAGAIN) {
reconnect_connect_failed(s->reconnect, time_msec(), error);
stream_close(s->stream);
s->stream = NULL;
}
}
switch (reconnect_run(s->reconnect, time_msec())) {
case RECONNECT_CONNECT:
jsonrpc_session_connect(s);
break;
case RECONNECT_DISCONNECT:
reconnect_disconnected(s->reconnect, time_msec(), 0);
jsonrpc_session_disconnect(s);
break;
case RECONNECT_PROBE:
if (s->rpc) {
struct json *params;
struct jsonrpc_msg *request;
params = json_array_create_empty();
request = jsonrpc_create_request("echo", params, NULL);
json_destroy(request->id);
request->id = json_string_create("echo");
jsonrpc_send(s->rpc, request);
}
break;
}
}
