2 * Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
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:
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
24 #include "dynamic-string.h"
25 #include "fatal-signal.h"
29 #include "poll-loop.h"
30 #include "reconnect.h"
35 VLOG_DEFINE_THIS_MODULE(jsonrpc);
38 struct stream *stream;
44 struct json_parser *parser;
45 struct jsonrpc_msg *received;
48 struct list output; /* Contains "struct ofpbuf"s. */
52 /* Rate limit for error messages. */
53 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 5);
55 static void jsonrpc_received(struct jsonrpc *);
56 static void jsonrpc_cleanup(struct jsonrpc *);
57 static void jsonrpc_error(struct jsonrpc *, int error);
59 /* This is just the same as stream_open() except that it uses the default
60 * JSONRPC ports if none is specified. */
62 jsonrpc_stream_open(const char *name, struct stream **streamp, uint8_t dscp)
64 return stream_open_with_default_ports(name, JSONRPC_TCP_PORT,
65 JSONRPC_SSL_PORT, streamp,
69 /* This is just the same as pstream_open() except that it uses the default
70 * JSONRPC ports if none is specified. */
72 jsonrpc_pstream_open(const char *name, struct pstream **pstreamp, uint8_t dscp)
74 return pstream_open_with_default_ports(name, JSONRPC_TCP_PORT,
75 JSONRPC_SSL_PORT, pstreamp, dscp);
78 /* Returns a new JSON-RPC stream that uses 'stream' for input and output. The
79 * new jsonrpc object takes ownership of 'stream'. */
81 jsonrpc_open(struct stream *stream)
85 ovs_assert(stream != NULL);
87 rpc = xzalloc(sizeof *rpc);
88 rpc->name = xstrdup(stream_get_name(stream));
90 byteq_init(&rpc->input);
91 list_init(&rpc->output);
96 /* Destroys 'rpc', closing the stream on which it is based, and frees its
99 jsonrpc_close(struct jsonrpc *rpc)
102 jsonrpc_cleanup(rpc);
108 /* Performs periodic maintenance on 'rpc', such as flushing output buffers. */
110 jsonrpc_run(struct jsonrpc *rpc)
116 stream_run(rpc->stream);
117 while (!list_is_empty(&rpc->output)) {
118 struct ofpbuf *buf = ofpbuf_from_list(rpc->output.next);
121 retval = stream_send(rpc->stream, buf->data, buf->size);
123 rpc->backlog -= retval;
124 ofpbuf_pull(buf, retval);
126 list_remove(&buf->list_node);
130 if (retval != -EAGAIN) {
131 VLOG_WARN_RL(&rl, "%s: send error: %s",
132 rpc->name, strerror(-retval));
133 jsonrpc_error(rpc, -retval);
140 /* Arranges for the poll loop to wake up when 'rpc' needs to perform
141 * maintenance activities. */
143 jsonrpc_wait(struct jsonrpc *rpc)
146 stream_run_wait(rpc->stream);
147 if (!list_is_empty(&rpc->output)) {
148 stream_send_wait(rpc->stream);
154 * Returns the current status of 'rpc'. The possible return values are:
157 * - EOF: end of file (remote end closed connection; not necessarily an error).
159 * When this functions nonzero, 'rpc' is effectively out of commission. 'rpc'
160 * will not receive any more messages and any further messages that one
161 * attempts to send with 'rpc' will be discarded. The caller can keep 'rpc'
162 * around as long as it wants, but it's not going to provide any more useful
166 jsonrpc_get_status(const struct jsonrpc *rpc)
171 /* Returns the number of bytes buffered by 'rpc' to be written to the
172 * underlying stream. Always returns 0 if 'rpc' has encountered an error or if
173 * the remote end closed the connection. */
175 jsonrpc_get_backlog(const struct jsonrpc *rpc)
177 return rpc->status ? 0 : rpc->backlog;
180 /* Returns the number of bytes that have been received on 'rpc''s underlying
181 * stream. (The value wraps around if it exceeds UINT_MAX.) */
183 jsonrpc_get_received_bytes(const struct jsonrpc *rpc)
185 return rpc->input.head;
188 /* Returns 'rpc''s name, that is, the name returned by stream_get_name() for
189 * the stream underlying 'rpc' when 'rpc' was created. */
191 jsonrpc_get_name(const struct jsonrpc *rpc)
197 jsonrpc_log_msg(const struct jsonrpc *rpc, const char *title,
198 const struct jsonrpc_msg *msg)
200 if (VLOG_IS_DBG_ENABLED()) {
201 struct ds s = DS_EMPTY_INITIALIZER;
203 ds_put_format(&s, ", method=\"%s\"", msg->method);
206 ds_put_cstr(&s, ", params=");
207 json_to_ds(msg->params, 0, &s);
210 ds_put_cstr(&s, ", result=");
211 json_to_ds(msg->result, 0, &s);
214 ds_put_cstr(&s, ", error=");
215 json_to_ds(msg->error, 0, &s);
218 ds_put_cstr(&s, ", id=");
219 json_to_ds(msg->id, 0, &s);
221 VLOG_DBG("%s: %s %s%s", rpc->name, title,
222 jsonrpc_msg_type_to_string(msg->type), ds_cstr(&s));
227 /* Schedules 'msg' to be sent on 'rpc' and returns 'rpc''s status (as with
228 * jsonrpc_get_status()).
230 * If 'msg' cannot be sent immediately, it is appended to a buffer. The caller
231 * is responsible for ensuring that the amount of buffered data is somehow
232 * limited. (jsonrpc_get_backlog() returns the amount of data currently
233 * buffered in 'rpc'.)
235 * Always takes ownership of 'msg', regardless of success. */
237 jsonrpc_send(struct jsonrpc *rpc, struct jsonrpc_msg *msg)
245 jsonrpc_msg_destroy(msg);
249 jsonrpc_log_msg(rpc, "send", msg);
251 json = jsonrpc_msg_to_json(msg);
252 s = json_to_string(json, 0);
256 buf = xmalloc(sizeof *buf);
257 ofpbuf_use(buf, s, length);
259 list_push_back(&rpc->output, &buf->list_node);
260 rpc->backlog += length;
262 if (rpc->backlog == length) {
268 /* Attempts to receive a message from 'rpc'.
270 * If successful, stores the received message in '*msgp' and returns 0. The
271 * caller takes ownership of '*msgp' and must eventually destroy it with
272 * jsonrpc_msg_destroy().
274 * Otherwise, stores NULL in '*msgp' and returns one of the following:
276 * - EAGAIN: No message has been received.
278 * - EOF: The remote end closed the connection gracefully.
280 * - Otherwise an errno value that represents a JSON-RPC protocol violation
281 * or another error fatal to the connection. 'rpc' will not send or
282 * receive any more messages.
285 jsonrpc_recv(struct jsonrpc *rpc, struct jsonrpc_msg **msgp)
294 for (i = 0; i < 50; i++) {
296 *msgp = rpc->received;
297 rpc->received = NULL;
299 } else if (byteq_is_empty(&rpc->input)) {
303 chunk = byteq_headroom(&rpc->input);
304 retval = stream_recv(rpc->stream, byteq_head(&rpc->input), chunk);
306 if (retval == -EAGAIN) {
309 VLOG_WARN_RL(&rl, "%s: receive error: %s",
310 rpc->name, strerror(-retval));
311 jsonrpc_error(rpc, -retval);
314 } else if (retval == 0) {
315 jsonrpc_error(rpc, EOF);
318 byteq_advance_head(&rpc->input, retval);
323 rpc->parser = json_parser_create(0);
325 n = byteq_tailroom(&rpc->input);
326 used = json_parser_feed(rpc->parser,
327 (char *) byteq_tail(&rpc->input), n);
328 byteq_advance_tail(&rpc->input, used);
329 if (json_parser_is_done(rpc->parser)) {
330 jsonrpc_received(rpc);
332 const struct byteq *q = &rpc->input;
333 if (q->head <= BYTEQ_SIZE) {
334 stream_report_content(q->buffer, q->head,
336 THIS_MODULE, rpc->name);
347 /* Causes the poll loop to wake up when jsonrpc_recv() may return a value other
350 jsonrpc_recv_wait(struct jsonrpc *rpc)
352 if (rpc->status || rpc->received || !byteq_is_empty(&rpc->input)) {
353 (poll_immediate_wake)(rpc->name);
355 stream_recv_wait(rpc->stream);
359 /* Sends 'msg' on 'rpc' and waits for it to be successfully queued to the
360 * underlying stream. Returns 0 if 'msg' was sent successfully, otherwise a
361 * status value (see jsonrpc_get_status()).
363 * Always takes ownership of 'msg', regardless of success. */
365 jsonrpc_send_block(struct jsonrpc *rpc, struct jsonrpc_msg *msg)
371 error = jsonrpc_send(rpc, msg);
378 if (list_is_empty(&rpc->output) || rpc->status) {
386 /* Waits for a message to be received on 'rpc'. Same semantics as
387 * jsonrpc_recv() except that EAGAIN will never be returned. */
389 jsonrpc_recv_block(struct jsonrpc *rpc, struct jsonrpc_msg **msgp)
392 int error = jsonrpc_recv(rpc, msgp);
393 if (error != EAGAIN) {
400 jsonrpc_recv_wait(rpc);
405 /* Sends 'request' to 'rpc' then waits for a reply. The return value is 0 if
406 * successful, in which case '*replyp' is set to the reply, which the caller
407 * must eventually free with jsonrpc_msg_destroy(). Otherwise returns a status
408 * value (see jsonrpc_get_status()).
410 * Discards any message received on 'rpc' that is not a reply to 'request'
411 * (based on message id).
413 * Always takes ownership of 'request', regardless of success. */
415 jsonrpc_transact_block(struct jsonrpc *rpc, struct jsonrpc_msg *request,
416 struct jsonrpc_msg **replyp)
418 struct jsonrpc_msg *reply = NULL;
422 id = json_clone(request->id);
423 error = jsonrpc_send_block(rpc, request);
426 error = jsonrpc_recv_block(rpc, &reply);
430 if ((reply->type == JSONRPC_REPLY || reply->type == JSONRPC_ERROR)
431 && json_equal(id, reply->id)) {
434 jsonrpc_msg_destroy(reply);
437 *replyp = error ? NULL : reply;
443 jsonrpc_received(struct jsonrpc *rpc)
445 struct jsonrpc_msg *msg;
449 json = json_parser_finish(rpc->parser);
451 if (json->type == JSON_STRING) {
452 VLOG_WARN_RL(&rl, "%s: error parsing stream: %s",
453 rpc->name, json_string(json));
454 jsonrpc_error(rpc, EPROTO);
459 error = jsonrpc_msg_from_json(json, &msg);
461 VLOG_WARN_RL(&rl, "%s: received bad JSON-RPC message: %s",
464 jsonrpc_error(rpc, EPROTO);
468 jsonrpc_log_msg(rpc, "received", msg);
473 jsonrpc_error(struct jsonrpc *rpc, int error)
478 jsonrpc_cleanup(rpc);
483 jsonrpc_cleanup(struct jsonrpc *rpc)
485 stream_close(rpc->stream);
488 json_parser_abort(rpc->parser);
491 jsonrpc_msg_destroy(rpc->received);
492 rpc->received = NULL;
494 ofpbuf_list_delete(&rpc->output);
498 static struct jsonrpc_msg *
499 jsonrpc_create(enum jsonrpc_msg_type type, const char *method,
500 struct json *params, struct json *result, struct json *error,
503 struct jsonrpc_msg *msg = xmalloc(sizeof *msg);
505 msg->method = method ? xstrdup(method) : NULL;
506 msg->params = params;
507 msg->result = result;
514 jsonrpc_create_id(void)
516 static unsigned int id;
517 return json_integer_create(id++);
521 jsonrpc_create_request(const char *method, struct json *params,
524 struct json *id = jsonrpc_create_id();
526 *idp = json_clone(id);
528 return jsonrpc_create(JSONRPC_REQUEST, method, params, NULL, NULL, id);
532 jsonrpc_create_notify(const char *method, struct json *params)
534 return jsonrpc_create(JSONRPC_NOTIFY, method, params, NULL, NULL, NULL);
538 jsonrpc_create_reply(struct json *result, const struct json *id)
540 return jsonrpc_create(JSONRPC_REPLY, NULL, NULL, result, NULL,
545 jsonrpc_create_error(struct json *error, const struct json *id)
547 return jsonrpc_create(JSONRPC_REPLY, NULL, NULL, NULL, error,
552 jsonrpc_msg_type_to_string(enum jsonrpc_msg_type type)
555 case JSONRPC_REQUEST:
559 return "notification";
571 jsonrpc_msg_is_valid(const struct jsonrpc_msg *m)
573 const char *type_name;
574 unsigned int pattern;
576 if (m->params && m->params->type != JSON_ARRAY) {
577 return xstrdup("\"params\" must be JSON array");
581 case JSONRPC_REQUEST:
598 return xasprintf("invalid JSON-RPC message type %d", m->type);
601 type_name = jsonrpc_msg_type_to_string(m->type);
602 if ((m->method != NULL) != ((pattern & 0x10000) != 0)) {
603 return xasprintf("%s must%s have \"method\"",
604 type_name, (pattern & 0x10000) ? "" : " not");
607 if ((m->params != NULL) != ((pattern & 0x1000) != 0)) {
608 return xasprintf("%s must%s have \"params\"",
609 type_name, (pattern & 0x1000) ? "" : " not");
612 if ((m->result != NULL) != ((pattern & 0x100) != 0)) {
613 return xasprintf("%s must%s have \"result\"",
614 type_name, (pattern & 0x100) ? "" : " not");
617 if ((m->error != NULL) != ((pattern & 0x10) != 0)) {
618 return xasprintf("%s must%s have \"error\"",
619 type_name, (pattern & 0x10) ? "" : " not");
622 if ((m->id != NULL) != ((pattern & 0x1) != 0)) {
623 return xasprintf("%s must%s have \"id\"",
624 type_name, (pattern & 0x1) ? "" : " not");
631 jsonrpc_msg_destroy(struct jsonrpc_msg *m)
635 json_destroy(m->params);
636 json_destroy(m->result);
637 json_destroy(m->error);
644 null_from_json_null(struct json *json)
646 if (json && json->type == JSON_NULL) {
654 jsonrpc_msg_from_json(struct json *json, struct jsonrpc_msg **msgp)
656 struct json *method = NULL;
657 struct jsonrpc_msg *msg = NULL;
658 struct shash *object;
661 if (json->type != JSON_OBJECT) {
662 error = xstrdup("message is not a JSON object");
665 object = json_object(json);
667 method = shash_find_and_delete(object, "method");
668 if (method && method->type != JSON_STRING) {
669 error = xstrdup("method is not a JSON string");
673 msg = xzalloc(sizeof *msg);
674 msg->method = method ? xstrdup(method->u.string) : NULL;
675 msg->params = null_from_json_null(shash_find_and_delete(object, "params"));
676 msg->result = null_from_json_null(shash_find_and_delete(object, "result"));
677 msg->error = null_from_json_null(shash_find_and_delete(object, "error"));
678 msg->id = null_from_json_null(shash_find_and_delete(object, "id"));
679 msg->type = (msg->result ? JSONRPC_REPLY
680 : msg->error ? JSONRPC_ERROR
681 : msg->id ? JSONRPC_REQUEST
683 if (!shash_is_empty(object)) {
684 error = xasprintf("message has unexpected member \"%s\"",
685 shash_first(object)->name);
688 error = jsonrpc_msg_is_valid(msg);
694 json_destroy(method);
697 jsonrpc_msg_destroy(msg);
705 jsonrpc_msg_to_json(struct jsonrpc_msg *m)
707 struct json *json = json_object_create();
710 json_object_put(json, "method", json_string_create_nocopy(m->method));
714 json_object_put(json, "params", m->params);
718 json_object_put(json, "result", m->result);
719 } else if (m->type == JSONRPC_ERROR) {
720 json_object_put(json, "result", json_null_create());
724 json_object_put(json, "error", m->error);
725 } else if (m->type == JSONRPC_REPLY) {
726 json_object_put(json, "error", json_null_create());
730 json_object_put(json, "id", m->id);
731 } else if (m->type == JSONRPC_NOTIFY) {
732 json_object_put(json, "id", json_null_create());
740 /* A JSON-RPC session with reconnection. */
742 struct jsonrpc_session {
743 struct reconnect *reconnect;
745 struct stream *stream;
746 struct pstream *pstream;
752 /* Creates and returns a jsonrpc_session to 'name', which should be a string
753 * acceptable to stream_open() or pstream_open().
755 * If 'name' is an active connection method, e.g. "tcp:127.1.2.3", the new
756 * jsonrpc_session connects to 'name'. If 'retry' is true, then the new
757 * session connects and reconnects to 'name', with backoff. If 'retry' is
758 * false, the new session will only try to connect once and after a connection
759 * failure or a disconnection jsonrpc_session_is_alive() will return false for
762 * If 'name' is a passive connection method, e.g. "ptcp:", the new
763 * jsonrpc_session listens for connections to 'name'. It maintains at most one
764 * connection at any given time. Any new connection causes the previous one
765 * (if any) to be dropped. */
766 struct jsonrpc_session *
767 jsonrpc_session_open(const char *name, bool retry)
769 struct jsonrpc_session *s;
771 s = xmalloc(sizeof *s);
772 s->reconnect = reconnect_create(time_msec());
773 reconnect_set_name(s->reconnect, name);
774 reconnect_enable(s->reconnect, time_msec());
782 if (!pstream_verify_name(name)) {
783 reconnect_set_passive(s->reconnect, true, time_msec());
785 reconnect_set_max_tries(s->reconnect, 1);
786 reconnect_set_backoff(s->reconnect, INT_MAX, INT_MAX);
789 if (!stream_or_pstream_needs_probes(name)) {
790 reconnect_set_probe_interval(s->reconnect, 0);
796 /* Creates and returns a jsonrpc_session that is initially connected to
797 * 'jsonrpc'. If the connection is dropped, it will not be reconnected.
799 * On the assumption that such connections are likely to be short-lived
800 * (e.g. from ovs-vsctl), informational logging for them is suppressed. */
801 struct jsonrpc_session *
802 jsonrpc_session_open_unreliably(struct jsonrpc *jsonrpc, uint8_t dscp)
804 struct jsonrpc_session *s;
806 s = xmalloc(sizeof *s);
807 s->reconnect = reconnect_create(time_msec());
808 reconnect_set_quiet(s->reconnect, true);
809 reconnect_set_name(s->reconnect, jsonrpc_get_name(jsonrpc));
810 reconnect_set_max_tries(s->reconnect, 0);
811 reconnect_connected(s->reconnect, time_msec());
822 jsonrpc_session_close(struct jsonrpc_session *s)
825 jsonrpc_close(s->rpc);
826 reconnect_destroy(s->reconnect);
827 stream_close(s->stream);
828 pstream_close(s->pstream);
834 jsonrpc_session_disconnect(struct jsonrpc_session *s)
837 jsonrpc_error(s->rpc, EOF);
838 jsonrpc_close(s->rpc);
841 } else if (s->stream) {
842 stream_close(s->stream);
849 jsonrpc_session_connect(struct jsonrpc_session *s)
851 const char *name = reconnect_get_name(s->reconnect);
854 jsonrpc_session_disconnect(s);
855 if (!reconnect_is_passive(s->reconnect)) {
856 error = jsonrpc_stream_open(name, &s->stream, s->dscp);
858 reconnect_connecting(s->reconnect, time_msec());
860 s->last_error = error;
863 error = s->pstream ? 0 : jsonrpc_pstream_open(name, &s->pstream,
866 reconnect_listening(s->reconnect, time_msec());
871 reconnect_connect_failed(s->reconnect, time_msec(), error);
877 jsonrpc_session_run(struct jsonrpc_session *s)
880 struct stream *stream;
883 error = pstream_accept(s->pstream, &stream);
885 if (s->rpc || s->stream) {
887 "%s: new connection replacing active connection",
888 reconnect_get_name(s->reconnect));
889 jsonrpc_session_disconnect(s);
891 reconnect_connected(s->reconnect, time_msec());
892 s->rpc = jsonrpc_open(stream);
893 } else if (error != EAGAIN) {
894 reconnect_listen_error(s->reconnect, time_msec(), error);
895 pstream_close(s->pstream);
904 backlog = jsonrpc_get_backlog(s->rpc);
906 if (jsonrpc_get_backlog(s->rpc) < backlog) {
907 /* Data previously caught in a queue was successfully sent (or
908 * there's an error, which we'll catch below.)
910 * We don't count data that is successfully sent immediately as
911 * activity, because there's a lot of queuing downstream from us,
912 * which means that we can push a lot of data into a connection
913 * that has stalled and won't ever recover.
915 reconnect_activity(s->reconnect, time_msec());
918 error = jsonrpc_get_status(s->rpc);
920 reconnect_disconnected(s->reconnect, time_msec(), error);
921 jsonrpc_session_disconnect(s);
922 s->last_error = error;
924 } else if (s->stream) {
927 stream_run(s->stream);
928 error = stream_connect(s->stream);
930 reconnect_connected(s->reconnect, time_msec());
931 s->rpc = jsonrpc_open(s->stream);
933 } else if (error != EAGAIN) {
934 reconnect_connect_failed(s->reconnect, time_msec(), error);
935 stream_close(s->stream);
940 switch (reconnect_run(s->reconnect, time_msec())) {
941 case RECONNECT_CONNECT:
942 jsonrpc_session_connect(s);
945 case RECONNECT_DISCONNECT:
946 reconnect_disconnected(s->reconnect, time_msec(), 0);
947 jsonrpc_session_disconnect(s);
950 case RECONNECT_PROBE:
953 struct jsonrpc_msg *request;
955 params = json_array_create_empty();
956 request = jsonrpc_create_request("echo", params, NULL);
957 json_destroy(request->id);
958 request->id = json_string_create("echo");
959 jsonrpc_send(s->rpc, request);
966 jsonrpc_session_wait(struct jsonrpc_session *s)
969 jsonrpc_wait(s->rpc);
970 } else if (s->stream) {
971 stream_run_wait(s->stream);
972 stream_connect_wait(s->stream);
975 pstream_wait(s->pstream);
977 reconnect_wait(s->reconnect, time_msec());
981 jsonrpc_session_get_backlog(const struct jsonrpc_session *s)
983 return s->rpc ? jsonrpc_get_backlog(s->rpc) : 0;
986 /* Always returns a pointer to a valid C string, assuming 's' was initialized
989 jsonrpc_session_get_name(const struct jsonrpc_session *s)
991 return reconnect_get_name(s->reconnect);
994 /* Always takes ownership of 'msg', regardless of success. */
996 jsonrpc_session_send(struct jsonrpc_session *s, struct jsonrpc_msg *msg)
999 return jsonrpc_send(s->rpc, msg);
1001 jsonrpc_msg_destroy(msg);
1006 struct jsonrpc_msg *
1007 jsonrpc_session_recv(struct jsonrpc_session *s)
1010 unsigned int received_bytes;
1011 struct jsonrpc_msg *msg;
1013 received_bytes = jsonrpc_get_received_bytes(s->rpc);
1014 jsonrpc_recv(s->rpc, &msg);
1015 if (received_bytes != jsonrpc_get_received_bytes(s->rpc)) {
1016 /* Data was successfully received.
1018 * Previously we only counted receiving a full message as activity,
1019 * but with large messages or a slow connection that policy could
1020 * time out the session mid-message. */
1021 reconnect_activity(s->reconnect, time_msec());
1025 if (msg->type == JSONRPC_REQUEST && !strcmp(msg->method, "echo")) {
1026 /* Echo request. Send reply. */
1027 struct jsonrpc_msg *reply;
1029 reply = jsonrpc_create_reply(json_clone(msg->params), msg->id);
1030 jsonrpc_session_send(s, reply);
1031 } else if (msg->type == JSONRPC_REPLY
1032 && msg->id && msg->id->type == JSON_STRING
1033 && !strcmp(msg->id->u.string, "echo")) {
1034 /* It's a reply to our echo request. Suppress it. */
1038 jsonrpc_msg_destroy(msg);
1045 jsonrpc_session_recv_wait(struct jsonrpc_session *s)
1048 jsonrpc_recv_wait(s->rpc);
1053 jsonrpc_session_is_alive(const struct jsonrpc_session *s)
1055 return s->rpc || s->stream || reconnect_get_max_tries(s->reconnect);
1059 jsonrpc_session_is_connected(const struct jsonrpc_session *s)
1061 return s->rpc != NULL;
1065 jsonrpc_session_get_seqno(const struct jsonrpc_session *s)
1071 jsonrpc_session_get_status(const struct jsonrpc_session *s)
1073 return s && s->rpc ? jsonrpc_get_status(s->rpc) : 0;
1077 jsonrpc_session_get_last_error(const struct jsonrpc_session *s)
1079 return s->last_error;
1083 jsonrpc_session_get_reconnect_stats(const struct jsonrpc_session *s,
1084 struct reconnect_stats *stats)
1086 reconnect_get_stats(s->reconnect, time_msec(), stats);
1090 jsonrpc_session_force_reconnect(struct jsonrpc_session *s)
1092 reconnect_force_reconnect(s->reconnect, time_msec());
1096 jsonrpc_session_set_max_backoff(struct jsonrpc_session *s, int max_backoff)
1098 reconnect_set_backoff(s->reconnect, 0, max_backoff);
1102 jsonrpc_session_set_probe_interval(struct jsonrpc_session *s,
1105 reconnect_set_probe_interval(s->reconnect, probe_interval);
1109 jsonrpc_session_set_dscp(struct jsonrpc_session *s,
1112 if (s->dscp != dscp) {
1116 error = pstream_set_dscp(s->pstream, dscp);
1118 VLOG_ERR("%s: failed set_dscp %s",
1119 reconnect_get_name(s->reconnect), strerror(error));
1122 * XXX race window between setting dscp to listening socket
1123 * and accepting socket. accepted socket may have old dscp value.
1124 * Ignore this race window for now.
1128 jsonrpc_session_force_reconnect(s);