2 * Copyright 2019 - Francis Deslauriers <francis.deslauriers@efficios.com>
3 * Copyright 2016 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to deal
7 * in the Software without restriction, including without limitation the rights
8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 * copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 #define BT_COMP_LOG_SELF_COMP (viewer_connection->self_comp)
25 #define BT_LOG_OUTPUT_LEVEL (viewer_connection->log_level)
26 #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/VIEWER"
27 #include "logging/comp-logging.h"
36 #include <sys/types.h>
39 #include "compat/socket.h"
40 #include "compat/endian.h"
41 #include "compat/compiler.h"
42 #include "common/common.h"
43 #include <babeltrace2/babeltrace.h>
45 #include "lttng-live.h"
46 #include "viewer-connection.h"
47 #include "lttng-viewer-abi.h"
48 #include "data-stream.h"
52 ssize_t
lttng_live_recv(struct live_viewer_connection
*viewer_connection
,
53 void *buf
, size_t len
)
56 size_t copied
= 0, to_copy
= len
;
57 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
58 viewer_connection
->lttng_live_msg_iter
;
59 BT_SOCKET sock
= viewer_connection
->control_sock
;
62 ret
= bt_socket_recv(sock
, buf
+ copied
, to_copy
, 0);
64 BT_ASSERT(ret
<= to_copy
);
68 if (ret
== BT_SOCKET_ERROR
&& bt_socket_interrupted()) {
69 if (!viewer_connection
->in_query
&&
70 lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
76 } while (ret
> 0 && to_copy
> 0);
79 /* ret = 0 means orderly shutdown, ret == BT_SOCKET_ERROR is error. */
84 ssize_t
lttng_live_send(struct live_viewer_connection
*viewer_connection
,
85 const void *buf
, size_t len
)
87 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
88 viewer_connection
->lttng_live_msg_iter
;
89 BT_SOCKET sock
= viewer_connection
->control_sock
;
93 ret
= bt_socket_send_nosigpipe(sock
, buf
, len
);
94 if (ret
== BT_SOCKET_ERROR
&& bt_socket_interrupted()) {
95 if (!viewer_connection
->in_query
&&
96 lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
109 int parse_url(struct live_viewer_connection
*viewer_connection
)
111 char error_buf
[256] = { 0 };
112 struct bt_common_lttng_live_url_parts lttng_live_url_parts
= { 0 };
114 const char *path
= viewer_connection
->url
->str
;
120 lttng_live_url_parts
= bt_common_parse_lttng_live_url(path
, error_buf
,
122 if (!lttng_live_url_parts
.proto
) {
123 BT_COMP_LOGW("Invalid LTTng live URL format: %s", error_buf
);
127 viewer_connection
->relay_hostname
= lttng_live_url_parts
.hostname
;
128 lttng_live_url_parts
.hostname
= NULL
;
130 if (lttng_live_url_parts
.port
>= 0) {
131 viewer_connection
->port
= lttng_live_url_parts
.port
;
133 viewer_connection
->port
= LTTNG_DEFAULT_NETWORK_VIEWER_PORT
;
136 viewer_connection
->target_hostname
= lttng_live_url_parts
.target_hostname
;
137 lttng_live_url_parts
.target_hostname
= NULL
;
139 if (lttng_live_url_parts
.session_name
) {
140 viewer_connection
->session_name
= lttng_live_url_parts
.session_name
;
141 lttng_live_url_parts
.session_name
= NULL
;
144 BT_COMP_LOGI("Connecting to hostname : %s, port : %d, "
145 "target hostname : %s, session name : %s, proto : %s",
146 viewer_connection
->relay_hostname
->str
,
147 viewer_connection
->port
,
148 !viewer_connection
->target_hostname
?
149 "<none>" : viewer_connection
->target_hostname
->str
,
150 !viewer_connection
->session_name
?
151 "<none>" : viewer_connection
->session_name
->str
,
152 lttng_live_url_parts
.proto
->str
);
156 bt_common_destroy_lttng_live_url_parts(<tng_live_url_parts
);
161 int lttng_live_handshake(struct live_viewer_connection
*viewer_connection
)
163 struct lttng_viewer_cmd cmd
;
164 struct lttng_viewer_connect connect
;
165 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(connect
);
166 char cmd_buf
[cmd_buf_len
];
170 cmd
.cmd
= htobe32(LTTNG_VIEWER_CONNECT
);
171 cmd
.data_size
= htobe64((uint64_t) sizeof(connect
));
172 cmd
.cmd_version
= htobe32(0);
174 connect
.viewer_session_id
= -1ULL; /* will be set on recv */
175 connect
.major
= htobe32(LTTNG_LIVE_MAJOR
);
176 connect
.minor
= htobe32(LTTNG_LIVE_MINOR
);
177 connect
.type
= htobe32(LTTNG_VIEWER_CLIENT_COMMAND
);
180 * Merge the cmd and connection request to prevent a write-write
181 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
182 * second write to be performed quickly in presence of Nagle's algorithm
184 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
185 memcpy(cmd_buf
+ sizeof(cmd
), &connect
, sizeof(connect
));
186 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
187 if (ret_len
== BT_SOCKET_ERROR
) {
188 BT_COMP_LOGE("Error sending version: %s", bt_socket_errormsg());
192 BT_ASSERT(ret_len
== cmd_buf_len
);
194 ret_len
= lttng_live_recv(viewer_connection
, &connect
, sizeof(connect
));
196 BT_COMP_LOGI("Remote side has closed connection");
199 if (ret_len
== BT_SOCKET_ERROR
) {
200 BT_COMP_LOGE("Error receiving version: %s", bt_socket_errormsg());
203 BT_ASSERT(ret_len
== sizeof(connect
));
205 BT_COMP_LOGI("Received viewer session ID : %" PRIu64
,
206 (uint64_t) be64toh(connect
.viewer_session_id
));
207 BT_COMP_LOGI("Relayd version : %u.%u", be32toh(connect
.major
),
208 be32toh(connect
.minor
));
210 if (LTTNG_LIVE_MAJOR
!= be32toh(connect
.major
)) {
211 BT_COMP_LOGE("Incompatible lttng-relayd protocol");
214 /* Use the smallest protocol version implemented. */
215 if (LTTNG_LIVE_MINOR
> be32toh(connect
.minor
)) {
216 viewer_connection
->minor
= be32toh(connect
.minor
);
218 viewer_connection
->minor
= LTTNG_LIVE_MINOR
;
220 viewer_connection
->major
= LTTNG_LIVE_MAJOR
;
225 BT_COMP_LOGE("Unable to establish connection");
230 int lttng_live_connect_viewer(struct live_viewer_connection
*viewer_connection
)
232 struct hostent
*host
;
233 struct sockaddr_in server_addr
;
236 if (parse_url(viewer_connection
)) {
240 host
= gethostbyname(viewer_connection
->relay_hostname
->str
);
242 BT_COMP_LOGE("Cannot lookup hostname %s",
243 viewer_connection
->relay_hostname
->str
);
247 if ((viewer_connection
->control_sock
= socket(AF_INET
, SOCK_STREAM
, 0)) == BT_INVALID_SOCKET
) {
248 BT_COMP_LOGE("Socket creation failed: %s", bt_socket_errormsg());
252 server_addr
.sin_family
= AF_INET
;
253 server_addr
.sin_port
= htons(viewer_connection
->port
);
254 server_addr
.sin_addr
= *((struct in_addr
*) host
->h_addr
);
255 memset(&(server_addr
.sin_zero
), 0, 8);
257 if (connect(viewer_connection
->control_sock
, (struct sockaddr
*) &server_addr
,
258 sizeof(struct sockaddr
)) == BT_SOCKET_ERROR
) {
259 BT_COMP_LOGE("Connection failed: %s", bt_socket_errormsg());
262 if (lttng_live_handshake(viewer_connection
)) {
271 if (viewer_connection
->control_sock
!= BT_INVALID_SOCKET
) {
272 if (bt_socket_close(viewer_connection
->control_sock
) == BT_SOCKET_ERROR
) {
273 BT_COMP_LOGE("Close: %s", bt_socket_errormsg());
276 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
281 void lttng_live_disconnect_viewer(
282 struct live_viewer_connection
*viewer_connection
)
284 if (viewer_connection
->control_sock
== BT_INVALID_SOCKET
) {
287 if (bt_socket_close(viewer_connection
->control_sock
) == BT_SOCKET_ERROR
) {
288 BT_COMP_LOGE("Close: %s", bt_socket_errormsg());
289 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
294 void connection_release(bt_object
*obj
)
296 struct live_viewer_connection
*conn
=
297 container_of(obj
, struct live_viewer_connection
, obj
);
299 live_viewer_connection_destroy(conn
);
303 int list_update_session(bt_value
*results
,
304 const struct lttng_viewer_session
*session
,
305 bool *_found
, struct live_viewer_connection
*viewer_connection
)
309 bt_value
*map
= NULL
;
310 bt_value
*hostname
= NULL
;
311 bt_value
*session_name
= NULL
;
312 bt_value
*btval
= NULL
;
315 len
= bt_value_array_get_length(results
);
316 for (i
= 0; i
< len
; i
++) {
317 const char *hostname_str
= NULL
;
318 const char *session_name_str
= NULL
;
320 map
= bt_value_array_borrow_element_by_index(results
, i
);
322 BT_COMP_LOGE_STR("Error borrowing map.");
326 hostname
= bt_value_map_borrow_entry_value(map
, "target-hostname");
328 BT_COMP_LOGE_STR("Error borrowing \"target-hostname\" entry.");
332 session_name
= bt_value_map_borrow_entry_value(map
, "session-name");
334 BT_COMP_LOGE_STR("Error borrowing \"session-name\" entry.");
338 hostname_str
= bt_value_string_get(hostname
);
339 session_name_str
= bt_value_string_get(session_name
);
341 if (strcmp(session
->hostname
, hostname_str
) == 0
342 && strcmp(session
->session_name
, session_name_str
) == 0) {
344 uint32_t streams
= be32toh(session
->streams
);
345 uint32_t clients
= be32toh(session
->clients
);
349 btval
= bt_value_map_borrow_entry_value(map
, "stream-count");
351 BT_COMP_LOGE_STR("Error borrowing \"stream-count\" entry.");
355 val
= bt_value_integer_unsigned_get(btval
);
358 bt_value_integer_unsigned_set(btval
, val
);
360 btval
= bt_value_map_borrow_entry_value(map
, "client-count");
362 BT_COMP_LOGE_STR("Error borrowing \"client-count\" entry.");
366 val
= bt_value_integer_unsigned_get(btval
);
368 val
= bt_max_t(int64_t, clients
, val
);
369 bt_value_integer_unsigned_set(btval
, val
);
382 int list_append_session(bt_value
*results
,
384 const struct lttng_viewer_session
*session
,
385 struct live_viewer_connection
*viewer_connection
)
388 bt_value_map_insert_entry_status insert_status
;
389 bt_value_array_append_element_status append_status
;
390 bt_value
*map
= NULL
;
395 * If the session already exists, add the stream count to it,
396 * and do max of client counts.
398 ret
= list_update_session(results
, session
, &found
, viewer_connection
);
403 map
= bt_value_map_create();
405 BT_COMP_LOGE_STR("Error creating map value.");
410 if (base_url
->len
< 1) {
411 BT_COMP_LOGE_STR("Error: base_url length smaller than 1.");
419 url
= g_string_new(base_url
->str
);
420 g_string_append(url
, "/host/");
421 g_string_append(url
, session
->hostname
);
422 g_string_append_c(url
, '/');
423 g_string_append(url
, session
->session_name
);
425 insert_status
= bt_value_map_insert_string_entry(map
, "url", url
->str
);
426 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
427 BT_COMP_LOGE_STR("Error inserting \"url\" entry.");
433 * key = "target-hostname",
436 insert_status
= bt_value_map_insert_string_entry(map
, "target-hostname",
438 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
439 BT_COMP_LOGE_STR("Error inserting \"target-hostname\" entry.");
445 * key = "session-name",
448 insert_status
= bt_value_map_insert_string_entry(map
, "session-name",
449 session
->session_name
);
450 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
451 BT_COMP_LOGE_STR("Error inserting \"session-name\" entry.");
461 uint32_t live_timer
= be32toh(session
->live_timer
);
463 insert_status
= bt_value_map_insert_unsigned_integer_entry(
464 map
, "timer-us", live_timer
);
465 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
466 BT_COMP_LOGE_STR("Error inserting \"timer-us\" entry.");
473 * key = "stream-count",
477 uint32_t streams
= be32toh(session
->streams
);
479 insert_status
= bt_value_map_insert_unsigned_integer_entry(map
,
480 "stream-count", streams
);
481 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
482 BT_COMP_LOGE_STR("Error inserting \"stream-count\" entry.");
489 * key = "client-count",
493 uint32_t clients
= be32toh(session
->clients
);
495 insert_status
= bt_value_map_insert_unsigned_integer_entry(map
,
496 "client-count", clients
);
497 if (insert_status
!= BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK
) {
498 BT_COMP_LOGE_STR("Error inserting \"client-count\" entry.");
504 append_status
= bt_value_array_append_element(results
, map
);
505 if (append_status
!= BT_VALUE_ARRAY_APPEND_ELEMENT_STATUS_OK
) {
506 BT_COMP_LOGE_STR("Error appending map to results.");
512 g_string_free(url
, true);
514 BT_VALUE_PUT_REF_AND_RESET(map
);
519 * Data structure returned:
530 * key = "target-hostname",
534 * key = "session-name",
542 * key = "stream-count",
546 * key = "client-count",
555 bt_component_class_query_method_status
live_viewer_connection_list_sessions(
556 struct live_viewer_connection
*viewer_connection
,
557 const bt_value
**user_result
)
559 bt_component_class_query_method_status status
=
560 BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK
;
561 bt_value
*result
= NULL
;
562 struct lttng_viewer_cmd cmd
;
563 struct lttng_viewer_list_sessions list
;
564 uint32_t i
, sessions_count
;
567 result
= bt_value_array_create();
569 BT_COMP_LOGE("Error creating array");
570 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR
;
574 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
575 cmd
.data_size
= htobe64((uint64_t) 0);
576 cmd
.cmd_version
= htobe32(0);
578 ret_len
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
579 if (ret_len
== BT_SOCKET_ERROR
) {
580 BT_COMP_LOGE("Error sending cmd: %s", bt_socket_errormsg());
581 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
584 BT_ASSERT(ret_len
== sizeof(cmd
));
586 ret_len
= lttng_live_recv(viewer_connection
, &list
, sizeof(list
));
588 BT_COMP_LOGI("Remote side has closed connection");
589 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
592 if (ret_len
== BT_SOCKET_ERROR
) {
593 BT_COMP_LOGE("Error receiving session list: %s", bt_socket_errormsg());
594 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
597 BT_ASSERT(ret_len
== sizeof(list
));
599 sessions_count
= be32toh(list
.sessions_count
);
600 for (i
= 0; i
< sessions_count
; i
++) {
601 struct lttng_viewer_session lsession
;
603 ret_len
= lttng_live_recv(viewer_connection
, &lsession
,
606 BT_COMP_LOGI("Remote side has closed connection");
607 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
610 if (ret_len
== BT_SOCKET_ERROR
) {
611 BT_COMP_LOGE("Error receiving session: %s", bt_socket_errormsg());
612 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
615 BT_ASSERT(ret_len
== sizeof(lsession
));
616 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
617 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
618 if (list_append_session(result
, viewer_connection
->url
,
619 &lsession
, viewer_connection
)) {
620 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
625 *user_result
= result
;
628 BT_VALUE_PUT_REF_AND_RESET(result
);
634 int lttng_live_query_session_ids(struct lttng_live_msg_iter
*lttng_live_msg_iter
)
636 struct lttng_viewer_cmd cmd
;
637 struct lttng_viewer_list_sessions list
;
638 struct lttng_viewer_session lsession
;
639 uint32_t i
, sessions_count
;
642 struct live_viewer_connection
*viewer_connection
=
643 lttng_live_msg_iter
->viewer_connection
;
645 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
646 cmd
.data_size
= htobe64((uint64_t) 0);
647 cmd
.cmd_version
= htobe32(0);
649 ret_len
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
650 if (ret_len
== BT_SOCKET_ERROR
) {
651 BT_COMP_LOGE("Error sending cmd: %s", bt_socket_errormsg());
654 BT_ASSERT(ret_len
== sizeof(cmd
));
656 ret_len
= lttng_live_recv(viewer_connection
, &list
, sizeof(list
));
658 BT_COMP_LOGI("Remote side has closed connection");
661 if (ret_len
== BT_SOCKET_ERROR
) {
662 BT_COMP_LOGE("Error receiving session list: %s", bt_socket_errormsg());
665 BT_ASSERT(ret_len
== sizeof(list
));
667 sessions_count
= be32toh(list
.sessions_count
);
668 for (i
= 0; i
< sessions_count
; i
++) {
669 ret_len
= lttng_live_recv(viewer_connection
,
670 &lsession
, sizeof(lsession
));
672 BT_COMP_LOGI("Remote side has closed connection");
675 if (ret_len
== BT_SOCKET_ERROR
) {
676 BT_COMP_LOGE("Error receiving session: %s", bt_socket_errormsg());
679 BT_ASSERT(ret_len
== sizeof(lsession
));
680 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
681 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
682 session_id
= be64toh(lsession
.id
);
684 BT_COMP_LOGI("Adding session %" PRIu64
" hostname: %s session_name: %s",
685 session_id
, lsession
.hostname
, lsession
.session_name
);
687 if ((strncmp(lsession
.session_name
,
688 viewer_connection
->session_name
->str
,
689 LTTNG_VIEWER_NAME_MAX
) == 0) && (strncmp(lsession
.hostname
,
690 viewer_connection
->target_hostname
->str
,
691 LTTNG_VIEWER_HOST_NAME_MAX
) == 0)) {
692 if (lttng_live_add_session(lttng_live_msg_iter
, session_id
,
694 lsession
.session_name
)) {
703 BT_COMP_LOGE("Unable to query session ids");
708 int lttng_live_create_viewer_session(
709 struct lttng_live_msg_iter
*lttng_live_msg_iter
)
711 struct lttng_viewer_cmd cmd
;
712 struct lttng_viewer_create_session_response resp
;
714 struct live_viewer_connection
*viewer_connection
=
715 lttng_live_msg_iter
->viewer_connection
;
717 cmd
.cmd
= htobe32(LTTNG_VIEWER_CREATE_SESSION
);
718 cmd
.data_size
= htobe64((uint64_t) 0);
719 cmd
.cmd_version
= htobe32(0);
721 ret_len
= lttng_live_send(viewer_connection
, &cmd
, sizeof(cmd
));
722 if (ret_len
== BT_SOCKET_ERROR
) {
723 BT_COMP_LOGE("Error sending cmd: %s", bt_socket_errormsg());
726 BT_ASSERT(ret_len
== sizeof(cmd
));
728 ret_len
= lttng_live_recv(viewer_connection
, &resp
, sizeof(resp
));
730 BT_COMP_LOGI("Remote side has closed connection");
733 if (ret_len
== BT_SOCKET_ERROR
) {
734 BT_COMP_LOGE("Error receiving create session reply: %s", bt_socket_errormsg());
737 BT_ASSERT(ret_len
== sizeof(resp
));
739 if (be32toh(resp
.status
) != LTTNG_VIEWER_CREATE_SESSION_OK
) {
740 BT_COMP_LOGE("Error creating viewer session");
743 if (lttng_live_query_session_ids(lttng_live_msg_iter
)) {
754 int receive_streams(struct lttng_live_session
*session
,
755 uint32_t stream_count
)
759 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
760 session
->lttng_live_msg_iter
;
761 struct live_viewer_connection
*viewer_connection
=
762 lttng_live_msg_iter
->viewer_connection
;
764 BT_COMP_LOGI("Getting %" PRIu32
" new streams:", stream_count
);
765 for (i
= 0; i
< stream_count
; i
++) {
766 struct lttng_viewer_stream stream
;
767 struct lttng_live_stream_iterator
*live_stream
;
769 uint64_t ctf_trace_id
;
771 ret_len
= lttng_live_recv(viewer_connection
, &stream
, sizeof(stream
));
773 BT_COMP_LOGI("Remote side has closed connection");
776 if (ret_len
== BT_SOCKET_ERROR
) {
777 BT_COMP_LOGE("Error receiving stream");
780 BT_ASSERT(ret_len
== sizeof(stream
));
781 stream
.path_name
[LTTNG_VIEWER_PATH_MAX
- 1] = '\0';
782 stream
.channel_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
783 stream_id
= be64toh(stream
.id
);
784 ctf_trace_id
= be64toh(stream
.ctf_trace_id
);
786 if (stream
.metadata_flag
) {
787 BT_COMP_LOGI(" metadata stream %" PRIu64
" : %s/%s",
788 stream_id
, stream
.path_name
, stream
.channel_name
);
789 if (lttng_live_metadata_create_stream(session
,
790 ctf_trace_id
, stream_id
,
792 BT_COMP_LOGE("Error creating metadata stream");
796 session
->lazy_stream_msg_init
= true;
798 BT_COMP_LOGI(" stream %" PRIu64
" : %s/%s",
799 stream_id
, stream
.path_name
, stream
.channel_name
);
800 live_stream
= lttng_live_stream_iterator_create(session
,
801 ctf_trace_id
, stream_id
);
803 BT_COMP_LOGE("Error creating streamn");
815 int lttng_live_attach_session(struct lttng_live_session
*session
)
817 struct lttng_viewer_cmd cmd
;
818 struct lttng_viewer_attach_session_request rq
;
819 struct lttng_viewer_attach_session_response rp
;
820 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
821 session
->lttng_live_msg_iter
;
822 struct live_viewer_connection
*viewer_connection
=
823 lttng_live_msg_iter
->viewer_connection
;
824 uint64_t session_id
= session
->id
;
825 uint32_t streams_count
;
826 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
827 char cmd_buf
[cmd_buf_len
];
830 cmd
.cmd
= htobe32(LTTNG_VIEWER_ATTACH_SESSION
);
831 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
832 cmd
.cmd_version
= htobe32(0);
834 memset(&rq
, 0, sizeof(rq
));
835 rq
.session_id
= htobe64(session_id
);
836 // TODO: add cmd line parameter to select seek beginning
837 // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
838 rq
.seek
= htobe32(LTTNG_VIEWER_SEEK_LAST
);
841 * Merge the cmd and connection request to prevent a write-write
842 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
843 * second write to be performed quickly in presence of Nagle's algorithm.
845 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
846 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
847 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
848 if (ret_len
== BT_SOCKET_ERROR
) {
849 BT_COMP_LOGE("Error sending attach request: %s", bt_socket_errormsg());
853 BT_ASSERT(ret_len
== cmd_buf_len
);
854 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
856 BT_COMP_LOGI("Remote side has closed connection");
859 if (ret_len
== BT_SOCKET_ERROR
) {
860 BT_COMP_LOGE("Error receiving attach response: %s", bt_socket_errormsg());
863 BT_ASSERT(ret_len
== sizeof(rp
));
865 streams_count
= be32toh(rp
.streams_count
);
866 switch(be32toh(rp
.status
)) {
867 case LTTNG_VIEWER_ATTACH_OK
:
869 case LTTNG_VIEWER_ATTACH_UNK
:
870 BT_COMP_LOGW("Session id %" PRIu64
" is unknown", session_id
);
872 case LTTNG_VIEWER_ATTACH_ALREADY
:
873 BT_COMP_LOGW("There is already a viewer attached to this session");
875 case LTTNG_VIEWER_ATTACH_NOT_LIVE
:
876 BT_COMP_LOGW("Not a live session");
878 case LTTNG_VIEWER_ATTACH_SEEK_ERR
:
879 BT_COMP_LOGE("Wrong seek parameter");
882 BT_COMP_LOGE("Unknown attach return code %u", be32toh(rp
.status
));
886 /* We receive the initial list of streams. */
887 if (receive_streams(session
, streams_count
)) {
891 session
->attached
= true;
892 session
->new_streams_needed
= false;
901 int lttng_live_detach_session(struct lttng_live_session
*session
)
903 struct lttng_viewer_cmd cmd
;
904 struct lttng_viewer_detach_session_request rq
;
905 struct lttng_viewer_detach_session_response rp
;
907 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
908 session
->lttng_live_msg_iter
;
909 struct live_viewer_connection
*viewer_connection
=
910 lttng_live_msg_iter
->viewer_connection
;
911 uint64_t session_id
= session
->id
;
912 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
913 char cmd_buf
[cmd_buf_len
];
915 if (!session
->attached
) {
919 cmd
.cmd
= htobe32(LTTNG_VIEWER_DETACH_SESSION
);
920 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
921 cmd
.cmd_version
= htobe32(0);
923 memset(&rq
, 0, sizeof(rq
));
924 rq
.session_id
= htobe64(session_id
);
927 * Merge the cmd and connection request to prevent a write-write
928 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
929 * second write to be performed quickly in presence of Nagle's algorithm.
931 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
932 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
933 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
934 if (ret_len
== BT_SOCKET_ERROR
) {
935 BT_COMP_LOGE("Error sending detach request: %s", bt_socket_errormsg());
939 BT_ASSERT(ret_len
== cmd_buf_len
);
940 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
942 BT_COMP_LOGI("Remote side has closed connection");
945 if (ret_len
== BT_SOCKET_ERROR
) {
946 BT_COMP_LOGE("Error receiving detach response: %s", bt_socket_errormsg());
949 BT_ASSERT(ret_len
== sizeof(rp
));
951 switch(be32toh(rp
.status
)) {
952 case LTTNG_VIEWER_DETACH_SESSION_OK
:
954 case LTTNG_VIEWER_DETACH_SESSION_UNK
:
955 BT_COMP_LOGW("Session id %" PRIu64
" is unknown", session_id
);
957 case LTTNG_VIEWER_DETACH_SESSION_ERR
:
958 BT_COMP_LOGW("Error detaching session id %" PRIu64
"", session_id
);
961 BT_COMP_LOGE("Unknown detach return code %u", be32toh(rp
.status
));
965 session
->attached
= false;
974 ssize_t
lttng_live_get_one_metadata_packet(struct lttng_live_trace
*trace
,
979 struct lttng_viewer_cmd cmd
;
980 struct lttng_viewer_get_metadata rq
;
981 struct lttng_viewer_metadata_packet rp
;
984 struct lttng_live_session
*session
= trace
->session
;
985 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
986 session
->lttng_live_msg_iter
;
987 struct lttng_live_metadata
*metadata
= trace
->metadata
;
988 struct live_viewer_connection
*viewer_connection
=
989 lttng_live_msg_iter
->viewer_connection
;
990 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
991 char cmd_buf
[cmd_buf_len
];
993 rq
.stream_id
= htobe64(metadata
->stream_id
);
994 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_METADATA
);
995 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
996 cmd
.cmd_version
= htobe32(0);
999 * Merge the cmd and connection request to prevent a write-write
1000 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1001 * second write to be performed quickly in presence of Nagle's algorithm.
1003 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1004 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1005 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1006 if (ret_len
== BT_SOCKET_ERROR
) {
1007 BT_COMP_LOGE("Error sending get_metadata request: %s", bt_socket_errormsg());
1011 BT_ASSERT(ret_len
== cmd_buf_len
);
1012 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1014 BT_COMP_LOGI("Remote side has closed connection");
1017 if (ret_len
== BT_SOCKET_ERROR
) {
1018 BT_COMP_LOGE("Error receiving get_metadata response: %s", bt_socket_errormsg());
1021 BT_ASSERT(ret_len
== sizeof(rp
));
1023 switch (be32toh(rp
.status
)) {
1024 case LTTNG_VIEWER_METADATA_OK
:
1025 BT_COMP_LOGD("get_metadata : OK");
1027 case LTTNG_VIEWER_NO_NEW_METADATA
:
1028 BT_COMP_LOGD("get_metadata : NO NEW");
1031 case LTTNG_VIEWER_METADATA_ERR
:
1032 BT_COMP_LOGD("get_metadata : ERR");
1035 BT_COMP_LOGD("get_metadata : UNKNOWN");
1039 len
= be64toh(rp
.len
);
1040 BT_COMP_LOGD("Writing %" PRIu64
" bytes to metadata", len
);
1045 data
= calloc(1, len
);
1047 BT_COMP_LOGE("relay data calloc: %s", strerror(errno
));
1050 ret_len
= lttng_live_recv(viewer_connection
, data
, len
);
1052 BT_COMP_LOGI("Remote side has closed connection");
1053 goto error_free_data
;
1055 if (ret_len
== BT_SOCKET_ERROR
) {
1056 BT_COMP_LOGE("Error receiving trace packet: %s", bt_socket_errormsg());
1057 goto error_free_data
;
1059 BT_ASSERT(ret_len
== len
);
1062 ret_len
= fwrite(data
, 1, len
, fp
);
1063 } while (ret_len
< 0 && errno
== EINTR
);
1065 BT_COMP_LOGE("Writing in the metadata fp");
1066 goto error_free_data
;
1068 BT_ASSERT(ret_len
== len
);
1081 * Assign the fields from a lttng_viewer_index to a packet_index.
1084 void lttng_index_to_packet_index(struct lttng_viewer_index
*lindex
,
1085 struct packet_index
*pindex
)
1090 pindex
->offset
= be64toh(lindex
->offset
);
1091 pindex
->packet_size
= be64toh(lindex
->packet_size
);
1092 pindex
->content_size
= be64toh(lindex
->content_size
);
1093 pindex
->ts_cycles
.timestamp_begin
= be64toh(lindex
->timestamp_begin
);
1094 pindex
->ts_cycles
.timestamp_end
= be64toh(lindex
->timestamp_end
);
1095 pindex
->events_discarded
= be64toh(lindex
->events_discarded
);
1099 enum lttng_live_iterator_status
lttng_live_get_next_index(
1100 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1101 struct lttng_live_stream_iterator
*stream
,
1102 struct packet_index
*index
)
1104 struct lttng_viewer_cmd cmd
;
1105 struct lttng_viewer_get_next_index rq
;
1106 struct lttng_viewer_index rp
;
1107 enum lttng_live_iterator_status retstatus
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1108 struct live_viewer_connection
*viewer_connection
=
1109 lttng_live_msg_iter
->viewer_connection
;
1110 struct lttng_live_trace
*trace
= stream
->trace
;
1111 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1112 char cmd_buf
[cmd_buf_len
];
1113 uint32_t flags
, status
;
1116 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEXT_INDEX
);
1117 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1118 cmd
.cmd_version
= htobe32(0);
1121 memset(&rq
, 0, sizeof(rq
));
1122 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1125 * Merge the cmd and connection request to prevent a write-write
1126 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1127 * second write to be performed quickly in presence of Nagle's algorithm.
1129 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1130 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1131 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1132 if (ret_len
== BT_SOCKET_ERROR
) {
1133 BT_COMP_LOGE("Error sending get_next_index request: %s",
1134 bt_socket_errormsg());
1138 BT_ASSERT(ret_len
== cmd_buf_len
);
1139 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1141 BT_COMP_LOGI("Remote side has closed connection");
1144 if (ret_len
== BT_SOCKET_ERROR
) {
1145 BT_COMP_LOGE("Error receiving get_next_index response: %s",
1146 bt_socket_errormsg());
1149 BT_ASSERT(ret_len
== sizeof(rp
));
1151 flags
= be32toh(rp
.flags
);
1152 status
= be32toh(rp
.status
);
1155 case LTTNG_VIEWER_INDEX_INACTIVE
:
1157 uint64_t ctf_stream_class_id
;
1159 BT_COMP_LOGD("get_next_index: inactive");
1160 memset(index
, 0, sizeof(struct packet_index
));
1161 index
->ts_cycles
.timestamp_end
= be64toh(rp
.timestamp_end
);
1162 stream
->current_inactivity_ts
= index
->ts_cycles
.timestamp_end
;
1163 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1164 if (stream
->ctf_stream_class_id
!= -1ULL) {
1165 BT_ASSERT(stream
->ctf_stream_class_id
==
1166 ctf_stream_class_id
);
1168 stream
->ctf_stream_class_id
= ctf_stream_class_id
;
1170 stream
->state
= LTTNG_LIVE_STREAM_QUIESCENT
;
1173 case LTTNG_VIEWER_INDEX_OK
:
1175 uint64_t ctf_stream_class_id
;
1177 BT_COMP_LOGD("get_next_index: OK");
1178 lttng_index_to_packet_index(&rp
, index
);
1179 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1180 if (stream
->ctf_stream_class_id
!= -1ULL) {
1181 BT_ASSERT(stream
->ctf_stream_class_id
==
1182 ctf_stream_class_id
);
1184 stream
->ctf_stream_class_id
= ctf_stream_class_id
;
1187 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_DATA
;
1189 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1190 BT_COMP_LOGD("get_next_index: new metadata needed");
1191 trace
->new_metadata_needed
= true;
1193 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1194 BT_COMP_LOGD("get_next_index: new streams needed");
1195 lttng_live_need_new_streams(lttng_live_msg_iter
);
1199 case LTTNG_VIEWER_INDEX_RETRY
:
1200 BT_COMP_LOGD("get_next_index: retry");
1201 memset(index
, 0, sizeof(struct packet_index
));
1202 retstatus
= LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1203 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
;
1205 case LTTNG_VIEWER_INDEX_HUP
:
1206 BT_COMP_LOGD("get_next_index: stream hung up");
1207 memset(index
, 0, sizeof(struct packet_index
));
1208 index
->offset
= EOF
;
1209 retstatus
= LTTNG_LIVE_ITERATOR_STATUS_END
;
1210 stream
->state
= LTTNG_LIVE_STREAM_EOF
;
1211 stream
->has_stream_hung_up
= true;
1213 case LTTNG_VIEWER_INDEX_ERR
:
1214 BT_COMP_LOGE("get_next_index: error");
1215 memset(index
, 0, sizeof(struct packet_index
));
1216 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
;
1219 BT_COMP_LOGE("get_next_index: unknown value");
1220 memset(index
, 0, sizeof(struct packet_index
));
1221 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
;
1228 if (lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
1229 retstatus
= LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1231 retstatus
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1237 enum bt_msg_iter_medium_status
lttng_live_get_stream_bytes(
1238 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1239 struct lttng_live_stream_iterator
*stream
, uint8_t *buf
,
1240 uint64_t offset
, uint64_t req_len
, uint64_t *recv_len
)
1242 enum bt_msg_iter_medium_status retstatus
= BT_MSG_ITER_MEDIUM_STATUS_OK
;
1243 struct lttng_viewer_trace_packet rp
;
1244 struct lttng_viewer_cmd cmd
;
1245 struct lttng_viewer_get_packet rq
;
1246 struct live_viewer_connection
*viewer_connection
=
1247 lttng_live_msg_iter
->viewer_connection
;
1248 struct lttng_live_trace
*trace
= stream
->trace
;
1249 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1250 char cmd_buf
[cmd_buf_len
];
1251 uint32_t flags
, status
;
1254 BT_COMP_LOGD("lttng_live_get_stream_bytes: offset=%" PRIu64
", req_len=%" PRIu64
,
1256 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_PACKET
);
1257 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1258 cmd
.cmd_version
= htobe32(0);
1260 memset(&rq
, 0, sizeof(rq
));
1261 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1262 rq
.offset
= htobe64(offset
);
1263 rq
.len
= htobe32(req_len
);
1266 * Merge the cmd and connection request to prevent a write-write
1267 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1268 * second write to be performed quickly in presence of Nagle's algorithm.
1270 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1271 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1272 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1273 if (ret_len
== BT_SOCKET_ERROR
) {
1274 BT_COMP_LOGE("Error sending get_data request: %s", bt_socket_errormsg());
1278 BT_ASSERT(ret_len
== cmd_buf_len
);
1279 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1281 BT_COMP_LOGI("Remote side has closed connection");
1284 if (ret_len
== BT_SOCKET_ERROR
) {
1285 BT_COMP_LOGE("Error receiving get_data response: %s", bt_socket_errormsg());
1288 if (ret_len
!= sizeof(rp
)) {
1289 BT_COMP_LOGE("get_data_packet: expected %zu"
1290 ", received %zd", sizeof(rp
),
1295 flags
= be32toh(rp
.flags
);
1296 status
= be32toh(rp
.status
);
1299 case LTTNG_VIEWER_GET_PACKET_OK
:
1300 req_len
= be32toh(rp
.len
);
1301 BT_COMP_LOGD("get_data_packet: Ok, packet size : %" PRIu64
"", req_len
);
1303 case LTTNG_VIEWER_GET_PACKET_RETRY
:
1304 /* Unimplemented by relay daemon */
1305 BT_COMP_LOGD("get_data_packet: retry");
1306 retstatus
= BT_MSG_ITER_MEDIUM_STATUS_AGAIN
;
1308 case LTTNG_VIEWER_GET_PACKET_ERR
:
1309 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1310 BT_COMP_LOGD("get_data_packet: new metadata needed, try again later");
1311 trace
->new_metadata_needed
= true;
1313 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1314 BT_COMP_LOGD("get_data_packet: new streams needed, try again later");
1315 lttng_live_need_new_streams(lttng_live_msg_iter
);
1317 if (flags
& (LTTNG_VIEWER_FLAG_NEW_METADATA
1318 | LTTNG_VIEWER_FLAG_NEW_STREAM
)) {
1319 retstatus
= BT_MSG_ITER_MEDIUM_STATUS_AGAIN
;
1322 BT_COMP_LOGE("get_data_packet: error");
1324 case LTTNG_VIEWER_GET_PACKET_EOF
:
1325 retstatus
= BT_MSG_ITER_MEDIUM_STATUS_EOF
;
1328 BT_COMP_LOGE("get_data_packet: unknown");
1336 ret_len
= lttng_live_recv(viewer_connection
, buf
, req_len
);
1338 BT_COMP_LOGI("Remote side has closed connection");
1341 if (ret_len
== BT_SOCKET_ERROR
) {
1342 BT_COMP_LOGE("Error receiving trace packet: %s", bt_socket_errormsg());
1345 BT_ASSERT(ret_len
== req_len
);
1346 *recv_len
= ret_len
;
1351 if (lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
1352 retstatus
= BT_MSG_ITER_MEDIUM_STATUS_AGAIN
;
1354 retstatus
= BT_MSG_ITER_MEDIUM_STATUS_ERROR
;
1360 * Request new streams for a session.
1363 enum lttng_live_iterator_status
lttng_live_get_new_streams(
1364 struct lttng_live_session
*session
)
1366 enum lttng_live_iterator_status status
=
1367 LTTNG_LIVE_ITERATOR_STATUS_OK
;
1368 struct lttng_viewer_cmd cmd
;
1369 struct lttng_viewer_new_streams_request rq
;
1370 struct lttng_viewer_new_streams_response rp
;
1371 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
1372 session
->lttng_live_msg_iter
;
1373 struct live_viewer_connection
*viewer_connection
=
1374 lttng_live_msg_iter
->viewer_connection
;
1375 uint32_t streams_count
;
1376 const size_t cmd_buf_len
= sizeof(cmd
) + sizeof(rq
);
1377 char cmd_buf
[cmd_buf_len
];
1380 if (!session
->new_streams_needed
) {
1381 return LTTNG_LIVE_ITERATOR_STATUS_OK
;
1384 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEW_STREAMS
);
1385 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1386 cmd
.cmd_version
= htobe32(0);
1388 memset(&rq
, 0, sizeof(rq
));
1389 rq
.session_id
= htobe64(session
->id
);
1392 * Merge the cmd and connection request to prevent a write-write
1393 * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
1394 * second write to be performed quickly in presence of Nagle's algorithm.
1396 memcpy(cmd_buf
, &cmd
, sizeof(cmd
));
1397 memcpy(cmd_buf
+ sizeof(cmd
), &rq
, sizeof(rq
));
1398 ret_len
= lttng_live_send(viewer_connection
, &cmd_buf
, cmd_buf_len
);
1399 if (ret_len
== BT_SOCKET_ERROR
) {
1400 BT_COMP_LOGE("Error sending get_new_streams request: %s",
1401 bt_socket_errormsg());
1405 BT_ASSERT(ret_len
== cmd_buf_len
);
1406 ret_len
= lttng_live_recv(viewer_connection
, &rp
, sizeof(rp
));
1408 BT_COMP_LOGI("Remote side has closed connection");
1411 if (ret_len
== BT_SOCKET_ERROR
) {
1412 BT_COMP_LOGE("Error receiving get_new_streams response");
1415 BT_ASSERT(ret_len
== sizeof(rp
));
1417 streams_count
= be32toh(rp
.streams_count
);
1419 switch(be32toh(rp
.status
)) {
1420 case LTTNG_VIEWER_NEW_STREAMS_OK
:
1421 session
->new_streams_needed
= false;
1423 case LTTNG_VIEWER_NEW_STREAMS_NO_NEW
:
1424 session
->new_streams_needed
= false;
1426 case LTTNG_VIEWER_NEW_STREAMS_HUP
:
1427 session
->new_streams_needed
= false;
1428 session
->closed
= true;
1429 status
= LTTNG_LIVE_ITERATOR_STATUS_END
;
1431 case LTTNG_VIEWER_NEW_STREAMS_ERR
:
1432 BT_COMP_LOGE("get_new_streams error");
1435 BT_COMP_LOGE("Unknown return code %u", be32toh(rp
.status
));
1439 if (receive_streams(session
, streams_count
)) {
1446 if (lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
1447 status
= LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1449 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1455 struct live_viewer_connection
*live_viewer_connection_create(
1456 const char *url
, bool in_query
,
1457 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1458 bt_logging_level log_level
)
1460 struct live_viewer_connection
*viewer_connection
;
1462 viewer_connection
= g_new0(struct live_viewer_connection
, 1);
1464 if (bt_socket_init(log_level
) != 0) {
1468 viewer_connection
->log_level
= log_level
;
1470 if (lttng_live_msg_iter
) {
1471 viewer_connection
->self_comp
= lttng_live_msg_iter
->self_comp
;
1474 bt_object_init_shared(&viewer_connection
->obj
, connection_release
);
1475 viewer_connection
->control_sock
= BT_INVALID_SOCKET
;
1476 viewer_connection
->port
= -1;
1477 viewer_connection
->in_query
= in_query
;
1478 viewer_connection
->lttng_live_msg_iter
= lttng_live_msg_iter
;
1479 viewer_connection
->url
= g_string_new(url
);
1480 if (!viewer_connection
->url
) {
1484 BT_COMP_LOGI("Establishing connection to url \"%s\"...", url
);
1485 if (lttng_live_connect_viewer(viewer_connection
)) {
1488 BT_COMP_LOGI("Connection to url \"%s\" is established", url
);
1489 return viewer_connection
;
1492 BT_COMP_LOGW("Failure to establish connection to url \"%s\"", url
);
1494 if (viewer_connection
) {
1495 live_viewer_connection_destroy(viewer_connection
);
1502 void live_viewer_connection_destroy(
1503 struct live_viewer_connection
*viewer_connection
)
1505 BT_COMP_LOGI("Closing connection to url \"%s\"", viewer_connection
->url
->str
);
1506 lttng_live_disconnect_viewer(viewer_connection
);
1507 if (viewer_connection
->url
) {
1508 g_string_free(viewer_connection
->url
, true);
1510 if (viewer_connection
->relay_hostname
) {
1511 g_string_free(viewer_connection
->relay_hostname
, true);
1513 if (viewer_connection
->target_hostname
) {
1514 g_string_free(viewer_connection
->target_hostname
, true);
1516 if (viewer_connection
->session_name
) {
1517 g_string_free(viewer_connection
->session_name
, true);
1519 g_free(viewer_connection
);