2 * Copyright 2016 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 #include <sys/socket.h>
31 #include <sys/types.h>
32 #include <netinet/in.h>
37 #include <babeltrace/compat/send-internal.h>
38 #include <babeltrace/compiler-internal.h>
40 #include "lttng-live-internal.h"
41 #include "viewer-connection.h"
42 #include "lttng-viewer-abi.h"
43 #include "data-stream.h"
46 #define PRINT_ERR_STREAM viewer_connection->error_fp
47 #define PRINT_PREFIX "lttng-live-viewer-connection"
48 #define PRINT_DBG_CHECK lttng_live_debug
51 static ssize_t
lttng_live_recv(int fd
, void *buf
, size_t len
)
54 size_t copied
= 0, to_copy
= len
;
57 ret
= recv(fd
, buf
+ copied
, to_copy
, 0);
59 assert(ret
<= to_copy
);
63 } while ((ret
> 0 && to_copy
> 0)
64 || (ret
< 0 && errno
== EINTR
));
67 /* ret = 0 means orderly shutdown, ret < 0 is error. */
71 static ssize_t
lttng_live_send(int fd
, const void *buf
, size_t len
)
76 ret
= bt_send_nosigpipe(fd
, buf
, len
);
77 } while (ret
< 0 && errno
== EINTR
);
82 * hostname parameter needs to hold MAXNAMLEN chars.
84 static int parse_url(struct bt_live_viewer_connection
*viewer_connection
)
86 char remain
[3][MAXNAMLEN
];
87 int ret
= -1, proto
, proto_offset
= 0;
88 const char *path
= viewer_connection
->url
->str
;
94 path_len
= strlen(path
); /* not accounting \0 */
97 * Since sscanf API does not allow easily checking string length
98 * against a size defined by a macro. Test it beforehand on the
99 * input. We know the output is always <= than the input length.
101 if (path_len
>= MAXNAMLEN
) {
104 ret
= sscanf(path
, "net%d://", &proto
);
108 proto_offset
= strlen("net://");
110 /* net4:// or net6:// */
111 proto_offset
= strlen("netX://");
113 if (proto_offset
> path_len
) {
117 PERR("[error] IPv6 is currently unsupported by lttng-live\n");
120 /* TODO : parse for IPv6 as well */
121 /* Parse the hostname or IP */
122 ret
= sscanf(&path
[proto_offset
], "%[a-zA-Z.0-9%-]%s",
123 viewer_connection
->relay_hostname
, remain
[0]);
125 /* Optional port number */
126 switch (remain
[0][0]) {
128 ret
= sscanf(remain
[0], ":%d%s", &viewer_connection
->port
, remain
[1]);
129 /* Optional session ID with port number */
131 ret
= sscanf(remain
[1], "/%s", remain
[2]);
132 /* Accept 0 or 1 (optional) */
136 } else if (ret
== 0) {
137 PERR("[error] Missing port number after delimitor ':'\n");
143 /* Optional session ID */
144 ret
= sscanf(remain
[0], "/%s", remain
[2]);
145 /* Accept 0 or 1 (optional) */
151 PERR("[error] wrong delimitor : %c\n", remain
[0][0]);
157 if (viewer_connection
->port
< 0) {
158 viewer_connection
->port
= LTTNG_DEFAULT_NETWORK_VIEWER_PORT
;
161 if (strlen(remain
[2]) == 0) {
162 PDBG("Connecting to hostname : %s, port : %d, "
164 viewer_connection
->relay_hostname
,
165 viewer_connection
->port
,
170 ret
= sscanf(remain
[2], "host/%[a-zA-Z.0-9%-]/%s",
171 viewer_connection
->target_hostname
,
172 viewer_connection
->session_name
);
174 PERR("[error] Format : "
175 "net://<hostname>/host/<target_hostname>/<session_name>\n");
179 PDBG("Connecting to hostname : %s, port : %d, "
180 "target hostname : %s, session name : %s, "
182 viewer_connection
->relay_hostname
,
183 viewer_connection
->port
,
184 viewer_connection
->target_hostname
,
185 viewer_connection
->session_name
, proto
);
192 static int lttng_live_handshake(struct bt_live_viewer_connection
*viewer_connection
)
194 struct lttng_viewer_cmd cmd
;
195 struct lttng_viewer_connect connect
;
199 cmd
.cmd
= htobe32(LTTNG_VIEWER_CONNECT
);
200 cmd
.data_size
= htobe64((uint64_t) sizeof(connect
));
201 cmd
.cmd_version
= htobe32(0);
203 connect
.viewer_session_id
= -1ULL; /* will be set on recv */
204 connect
.major
= htobe32(LTTNG_LIVE_MAJOR
);
205 connect
.minor
= htobe32(LTTNG_LIVE_MINOR
);
206 connect
.type
= htobe32(LTTNG_VIEWER_CLIENT_COMMAND
);
208 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
210 PERR("Error sending cmd: %s\n", strerror(errno
));
213 assert(ret_len
== sizeof(cmd
));
215 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &connect
, sizeof(connect
));
217 PERR("Error sending version: %s\n", strerror(errno
));
220 assert(ret_len
== sizeof(connect
));
222 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &connect
, sizeof(connect
));
224 PERR("Remote side has closed connection\n");
228 PERR("[error] Error receiving version: %s", strerror(errno
));
231 assert(ret_len
== sizeof(connect
));
233 PDBG("Received viewer session ID : %" PRIu64
"\n",
234 be64toh(connect
.viewer_session_id
));
235 PDBG("Relayd version : %u.%u\n", be32toh(connect
.major
),
236 be32toh(connect
.minor
));
238 if (LTTNG_LIVE_MAJOR
!= be32toh(connect
.major
)) {
239 PERR("Incompatible lttng-relayd protocol\n");
242 /* Use the smallest protocol version implemented. */
243 if (LTTNG_LIVE_MINOR
> be32toh(connect
.minor
)) {
244 viewer_connection
->minor
= be32toh(connect
.minor
);
246 viewer_connection
->minor
= LTTNG_LIVE_MINOR
;
248 viewer_connection
->major
= LTTNG_LIVE_MAJOR
;
253 PERR("Unable to establish connection\n");
257 static int lttng_live_connect_viewer(struct bt_live_viewer_connection
*viewer_connection
)
259 struct hostent
*host
;
260 struct sockaddr_in server_addr
;
263 if (parse_url(viewer_connection
)) {
267 host
= gethostbyname(viewer_connection
->relay_hostname
);
269 PERR("[error] Cannot lookup hostname %s\n",
270 viewer_connection
->relay_hostname
);
274 if ((viewer_connection
->control_sock
= socket(AF_INET
, SOCK_STREAM
, 0)) == -1) {
275 PERR("[error] Socket creation failed: %s\n", strerror(errno
));
279 server_addr
.sin_family
= AF_INET
;
280 server_addr
.sin_port
= htons(viewer_connection
->port
);
281 server_addr
.sin_addr
= *((struct in_addr
*) host
->h_addr
);
282 memset(&(server_addr
.sin_zero
), 0, 8);
284 if (connect(viewer_connection
->control_sock
, (struct sockaddr
*) &server_addr
,
285 sizeof(struct sockaddr
)) == -1) {
286 PERR("[error] Connection failed: %s\n", strerror(errno
));
289 if (lttng_live_handshake(viewer_connection
)) {
298 if (viewer_connection
->control_sock
>= 0) {
299 if (close(viewer_connection
->control_sock
)) {
300 PERR("Close: %s", strerror(errno
));
303 viewer_connection
->control_sock
= -1;
307 static void lttng_live_disconnect_viewer(struct bt_live_viewer_connection
*viewer_connection
)
309 if (viewer_connection
->control_sock
< 0) {
312 if (close(viewer_connection
->control_sock
)) {
313 PERR("Close: %s", strerror(errno
));
314 viewer_connection
->control_sock
= -1;
318 static void connection_release(struct bt_object
*obj
)
320 struct bt_live_viewer_connection
*conn
=
321 container_of(obj
, struct bt_live_viewer_connection
, obj
);
323 bt_live_viewer_connection_destroy(conn
);
327 enum bt_value_status
list_update_session(struct bt_value
*results
,
328 const struct lttng_viewer_session
*session
,
331 enum bt_value_status ret
= BT_VALUE_STATUS_OK
;
332 struct bt_value
*map
= NULL
;
333 struct bt_value
*hostname
= NULL
;
334 struct bt_value
*session_name
= NULL
;
335 struct bt_value
*btval
= NULL
;
339 len
= bt_value_array_size(results
);
341 ret
= BT_VALUE_STATUS_ERROR
;
344 for (i
= 0; i
< len
; i
++) {
345 const char *hostname_str
= NULL
;
346 const char *session_name_str
= NULL
;
348 map
= bt_value_array_get(results
, (size_t) i
);
350 ret
= BT_VALUE_STATUS_ERROR
;
353 hostname
= bt_value_map_get(map
, "target-hostname");
355 ret
= BT_VALUE_STATUS_ERROR
;
358 session_name
= bt_value_map_get(map
, "session-name");
360 ret
= BT_VALUE_STATUS_ERROR
;
363 ret
= bt_value_string_get(hostname
, &hostname_str
);
364 if (ret
!= BT_VALUE_STATUS_OK
) {
367 ret
= bt_value_string_get(session_name
, &session_name_str
);
368 if (ret
!= BT_VALUE_STATUS_OK
) {
372 if (!strcmp(session
->hostname
, hostname_str
)
373 && !strcmp(session
->session_name
,
376 uint32_t streams
= be32toh(session
->streams
);
377 uint32_t clients
= be32toh(session
->clients
);
381 btval
= bt_value_map_get(map
, "stream-count");
383 ret
= BT_VALUE_STATUS_ERROR
;
386 ret
= bt_value_integer_get(btval
, &val
);
387 if (ret
!= BT_VALUE_STATUS_OK
) {
392 ret
= bt_value_integer_set(btval
, val
);
393 if (ret
!= BT_VALUE_STATUS_OK
) {
398 btval
= bt_value_map_get(map
, "client-count");
400 ret
= BT_VALUE_STATUS_ERROR
;
403 ret
= bt_value_integer_get(btval
, &val
);
404 if (ret
!= BT_VALUE_STATUS_OK
) {
408 val
= max_t(int64_t, clients
, val
);
409 ret
= bt_value_integer_set(btval
, val
);
410 if (ret
!= BT_VALUE_STATUS_OK
) {
417 BT_PUT(session_name
);
427 BT_PUT(session_name
);
434 enum bt_value_status
list_append_session(struct bt_value
*results
,
436 const struct lttng_viewer_session
*session
)
438 enum bt_value_status ret
= BT_VALUE_STATUS_OK
;
439 struct bt_value
*map
= NULL
;
444 * If the session already exists, add the stream count to it,
445 * and do max of client counts.
447 ret
= list_update_session(results
, session
, &found
);
448 if (ret
!= BT_VALUE_STATUS_OK
|| found
) {
452 map
= bt_value_map_create();
454 ret
= BT_VALUE_STATUS_ERROR
;
458 if (base_url
->len
< 1) {
459 ret
= BT_VALUE_STATUS_ERROR
;
466 url
= g_string_new(base_url
->str
);
467 g_string_append(url
, "/host/");
468 g_string_append(url
, session
->hostname
);
469 g_string_append_c(url
, '/');
470 g_string_append(url
, session
->session_name
);
472 ret
= bt_value_map_insert_string(map
, "url", url
->str
);
473 if (ret
!= BT_VALUE_STATUS_OK
) {
478 * key = "target-hostname",
481 ret
= bt_value_map_insert_string(map
, "target-hostname",
483 if (ret
!= BT_VALUE_STATUS_OK
) {
488 * key = "session-name",
491 ret
= bt_value_map_insert_string(map
, "session-name",
492 session
->session_name
);
493 if (ret
!= BT_VALUE_STATUS_OK
) {
502 uint32_t live_timer
= be32toh(session
->live_timer
);
504 ret
= bt_value_map_insert_integer(map
, "timer-us",
506 if (ret
!= BT_VALUE_STATUS_OK
) {
512 * key = "stream-count",
516 uint32_t streams
= be32toh(session
->streams
);
518 ret
= bt_value_map_insert_integer(map
, "stream-count",
520 if (ret
!= BT_VALUE_STATUS_OK
) {
527 * key = "client-count",
531 uint32_t clients
= be32toh(session
->clients
);
533 ret
= bt_value_map_insert_integer(map
, "client-count",
535 if (ret
!= BT_VALUE_STATUS_OK
) {
540 ret
= bt_value_array_append(results
, map
);
543 g_string_free(url
, TRUE
);
550 * Data structure returned:
561 * key = "target-hostname",
565 * key = "session-name",
573 * key = "stream-count",
577 * key = "client-count",
586 struct bt_value
*bt_live_viewer_connection_list_sessions(struct bt_live_viewer_connection
*viewer_connection
)
588 struct bt_value
*results
= NULL
;
589 struct lttng_viewer_cmd cmd
;
590 struct lttng_viewer_list_sessions list
;
591 uint32_t i
, sessions_count
;
594 if (lttng_live_handshake(viewer_connection
)) {
598 results
= bt_value_array_create();
600 fprintf(stderr
, "Error creating array\n");
604 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
605 cmd
.data_size
= htobe64((uint64_t) 0);
606 cmd
.cmd_version
= htobe32(0);
608 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
610 fprintf(stderr
, "Error sending cmd: %s\n", strerror(errno
));
613 assert(ret_len
== sizeof(cmd
));
615 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &list
, sizeof(list
));
617 fprintf(stderr
, "Remote side has closed connection\n");
621 fprintf(stderr
, "Error receiving session list: %s\n", strerror(errno
));
624 assert(ret_len
== sizeof(list
));
626 sessions_count
= be32toh(list
.sessions_count
);
627 for (i
= 0; i
< sessions_count
; i
++) {
628 struct lttng_viewer_session lsession
;
630 ret_len
= lttng_live_recv(viewer_connection
->control_sock
,
631 &lsession
, sizeof(lsession
));
633 fprintf(stderr
, "Remote side has closed connection\n");
637 fprintf(stderr
, "Error receiving session: %s\n", strerror(errno
));
640 assert(ret_len
== sizeof(lsession
));
641 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
642 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
643 if (list_append_session(results
,
644 viewer_connection
->url
, &lsession
)
645 != BT_VALUE_STATUS_OK
) {
657 int lttng_live_query_session_ids(struct lttng_live_component
*lttng_live
)
659 struct lttng_viewer_cmd cmd
;
660 struct lttng_viewer_list_sessions list
;
661 struct lttng_viewer_session lsession
;
662 uint32_t i
, sessions_count
;
665 struct bt_live_viewer_connection
*viewer_connection
=
666 lttng_live
->viewer_connection
;
668 cmd
.cmd
= htobe32(LTTNG_VIEWER_LIST_SESSIONS
);
669 cmd
.data_size
= htobe64((uint64_t) 0);
670 cmd
.cmd_version
= htobe32(0);
672 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
674 PERR("Error sending cmd: %s\n", strerror(errno
));
677 assert(ret_len
== sizeof(cmd
));
679 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &list
, sizeof(list
));
681 PERR("Remote side has closed connection\n");
685 PERR("Error receiving session list: %s\n", strerror(errno
));
688 assert(ret_len
== sizeof(list
));
690 sessions_count
= be32toh(list
.sessions_count
);
691 for (i
= 0; i
< sessions_count
; i
++) {
692 ret_len
= lttng_live_recv(viewer_connection
->control_sock
,
693 &lsession
, sizeof(lsession
));
695 PERR("Remote side has closed connection\n");
699 PERR("Error receiving session: %s\n", strerror(errno
));
702 assert(ret_len
== sizeof(lsession
));
703 lsession
.hostname
[LTTNG_VIEWER_HOST_NAME_MAX
- 1] = '\0';
704 lsession
.session_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
705 session_id
= be64toh(lsession
.id
);
707 if ((strncmp(lsession
.session_name
,
708 viewer_connection
->session_name
,
709 MAXNAMLEN
) == 0) && (strncmp(lsession
.hostname
,
710 viewer_connection
->target_hostname
,
712 if (lttng_live_add_session(lttng_live
, session_id
)) {
721 PERR("Unable to query session ids\n");
726 int lttng_live_create_viewer_session(struct lttng_live_component
*lttng_live
)
728 struct lttng_viewer_cmd cmd
;
729 struct lttng_viewer_create_session_response resp
;
731 struct bt_live_viewer_connection
*viewer_connection
=
732 lttng_live
->viewer_connection
;
734 cmd
.cmd
= htobe32(LTTNG_VIEWER_CREATE_SESSION
);
735 cmd
.data_size
= htobe64((uint64_t) 0);
736 cmd
.cmd_version
= htobe32(0);
738 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
740 PERR("Error sending cmd: %s\n", strerror(errno
));
743 assert(ret_len
== sizeof(cmd
));
745 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &resp
, sizeof(resp
));
747 PERR("Remote side has closed connection\n");
751 PERR("Error receiving create session reply: %s\n", strerror(errno
));
754 assert(ret_len
== sizeof(resp
));
756 if (be32toh(resp
.status
) != LTTNG_VIEWER_CREATE_SESSION_OK
) {
757 PERR("Error creating viewer session\n");
760 if (lttng_live_query_session_ids(lttng_live
)) {
771 int receive_streams(struct lttng_live_session
*session
,
772 uint32_t stream_count
)
776 struct lttng_live_component
*lttng_live
= session
->lttng_live
;
777 struct bt_live_viewer_connection
*viewer_connection
=
778 lttng_live
->viewer_connection
;
780 PDBG("Getting %" PRIu32
" new streams:\n", stream_count
);
781 for (i
= 0; i
< stream_count
; i
++) {
782 struct lttng_viewer_stream stream
;
783 struct lttng_live_stream_iterator
*live_stream
;
785 uint64_t ctf_trace_id
;
787 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &stream
, sizeof(stream
));
789 PERR("Remote side has closed connection\n");
793 PERR("Error receiving stream\n");
796 assert(ret_len
== sizeof(stream
));
797 stream
.path_name
[LTTNG_VIEWER_PATH_MAX
- 1] = '\0';
798 stream
.channel_name
[LTTNG_VIEWER_NAME_MAX
- 1] = '\0';
799 stream_id
= be64toh(stream
.id
);
800 ctf_trace_id
= be64toh(stream
.ctf_trace_id
);
802 if (stream
.metadata_flag
) {
803 PDBG(" metadata stream %" PRIu64
" : %s/%s\n",
804 stream_id
, stream
.path_name
,
805 stream
.channel_name
);
806 if (lttng_live_metadata_create_stream(session
,
807 ctf_trace_id
, stream_id
)) {
808 PERR("Error creating metadata stream\n");
812 session
->lazy_stream_notif_init
= true;
814 PDBG(" stream %" PRIu64
" : %s/%s\n",
815 stream_id
, stream
.path_name
,
816 stream
.channel_name
);
817 live_stream
= lttng_live_stream_iterator_create(session
,
818 ctf_trace_id
, stream_id
);
820 PERR("Error creating stream\n");
832 int lttng_live_attach_session(struct lttng_live_session
*session
)
834 struct lttng_viewer_cmd cmd
;
835 struct lttng_viewer_attach_session_request rq
;
836 struct lttng_viewer_attach_session_response rp
;
838 struct lttng_live_component
*lttng_live
= session
->lttng_live
;
839 struct bt_live_viewer_connection
*viewer_connection
=
840 lttng_live
->viewer_connection
;
841 uint64_t session_id
= session
->id
;
842 uint32_t streams_count
;
844 if (session
->attached
) {
848 cmd
.cmd
= htobe32(LTTNG_VIEWER_ATTACH_SESSION
);
849 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
850 cmd
.cmd_version
= htobe32(0);
852 memset(&rq
, 0, sizeof(rq
));
853 rq
.session_id
= htobe64(session_id
);
854 // TODO: add cmd line parameter to select seek beginning
855 // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
856 rq
.seek
= htobe32(LTTNG_VIEWER_SEEK_LAST
);
858 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
860 PERR("Error sending cmd: %s\n", strerror(errno
));
863 assert(ret_len
== sizeof(cmd
));
865 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &rq
, sizeof(rq
));
867 PERR("Error sending attach request: %s\n", strerror(errno
));
870 assert(ret_len
== sizeof(rq
));
872 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &rp
, sizeof(rp
));
874 PERR("Remote side has closed connection\n");
878 PERR("Error receiving attach response: %s\n", strerror(errno
));
881 assert(ret_len
== sizeof(rp
));
883 streams_count
= be32toh(rp
.streams_count
);
884 switch(be32toh(rp
.status
)) {
885 case LTTNG_VIEWER_ATTACH_OK
:
887 case LTTNG_VIEWER_ATTACH_UNK
:
888 PERR("Session id %" PRIu64
" is unknown\n", session_id
);
890 case LTTNG_VIEWER_ATTACH_ALREADY
:
891 PERR("There is already a viewer attached to this session\n");
893 case LTTNG_VIEWER_ATTACH_NOT_LIVE
:
894 PERR("Not a live session\n");
896 case LTTNG_VIEWER_ATTACH_SEEK_ERR
:
897 PERR("Wrong seek parameter\n");
900 PERR("Unknown attach return code %u\n", be32toh(rp
.status
));
904 /* We receive the initial list of streams. */
905 if (receive_streams(session
, streams_count
)) {
909 session
->attached
= true;
910 session
->new_streams_needed
= false;
919 int lttng_live_detach_session(struct lttng_live_session
*session
)
921 struct lttng_viewer_cmd cmd
;
922 struct lttng_viewer_detach_session_request rq
;
923 struct lttng_viewer_detach_session_response rp
;
925 struct lttng_live_component
*lttng_live
= session
->lttng_live
;
926 struct bt_live_viewer_connection
*viewer_connection
=
927 lttng_live
->viewer_connection
;
928 uint64_t session_id
= session
->id
;
930 if (!session
->attached
) {
934 cmd
.cmd
= htobe32(LTTNG_VIEWER_DETACH_SESSION
);
935 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
936 cmd
.cmd_version
= htobe32(0);
938 memset(&rq
, 0, sizeof(rq
));
939 rq
.session_id
= htobe64(session_id
);
941 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
943 PERR("Error sending cmd: %s\n", strerror(errno
));
946 assert(ret_len
== sizeof(cmd
));
948 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &rq
, sizeof(rq
));
950 PERR("Error sending detach request: %s\n", strerror(errno
));
953 assert(ret_len
== sizeof(rq
));
955 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &rp
, sizeof(rp
));
957 PERR("Remote side has closed connection\n");
961 PERR("Error receiving detach response: %s\n", strerror(errno
));
964 assert(ret_len
== sizeof(rp
));
966 switch(be32toh(rp
.status
)) {
967 case LTTNG_VIEWER_DETACH_SESSION_OK
:
969 case LTTNG_VIEWER_DETACH_SESSION_UNK
:
970 PERR("Session id %" PRIu64
" is unknown\n", session_id
);
972 case LTTNG_VIEWER_DETACH_SESSION_ERR
:
973 PERR("Error detaching session id %" PRIu64
"\n", session_id
);
976 PERR("Unknown detach return code %u\n", be32toh(rp
.status
));
980 session
->attached
= false;
989 ssize_t
lttng_live_get_one_metadata_packet(struct lttng_live_trace
*trace
,
994 struct lttng_viewer_cmd cmd
;
995 struct lttng_viewer_get_metadata rq
;
996 struct lttng_viewer_metadata_packet rp
;
999 struct lttng_live_session
*session
= trace
->session
;
1000 struct lttng_live_component
*lttng_live
= session
->lttng_live
;
1001 struct lttng_live_metadata
*metadata
= trace
->metadata
;
1002 struct bt_live_viewer_connection
*viewer_connection
=
1003 lttng_live
->viewer_connection
;
1005 rq
.stream_id
= htobe64(metadata
->stream_id
);
1006 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_METADATA
);
1007 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1008 cmd
.cmd_version
= htobe32(0);
1010 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
1012 PERR("Error sending cmd: %s\n", strerror(errno
));
1015 assert(ret_len
== sizeof(cmd
));
1017 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &rq
, sizeof(rq
));
1019 PERR("Error sending get_metadata request: %s\n", strerror(errno
));
1022 assert(ret_len
== sizeof(rq
));
1024 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &rp
, sizeof(rp
));
1026 PERR("Remote side has closed connection\n");
1030 PERR("Error receiving get_metadata response: %s\n", strerror(errno
));
1033 assert(ret_len
== sizeof(rp
));
1035 switch (be32toh(rp
.status
)) {
1036 case LTTNG_VIEWER_METADATA_OK
:
1037 PDBG("get_metadata : OK\n");
1039 case LTTNG_VIEWER_NO_NEW_METADATA
:
1040 PDBG("get_metadata : NO NEW\n");
1043 case LTTNG_VIEWER_METADATA_ERR
:
1044 PDBG("get_metadata : ERR\n");
1047 PDBG("get_metadata : UNKNOWN\n");
1051 len
= be64toh(rp
.len
);
1052 PDBG("Writing %" PRIu64
" bytes to metadata\n", len
);
1057 data
= zmalloc(len
);
1059 PERR("relay data zmalloc: %s", strerror(errno
));
1062 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, data
, len
);
1064 PERR("[error] Remote side has closed connection\n");
1065 goto error_free_data
;
1068 PERR("[error] Error receiving trace packet: %s", strerror(errno
));
1069 goto error_free_data
;
1071 assert(ret_len
== len
);
1074 ret_len
= fwrite(data
, 1, len
, fp
);
1075 } while (ret_len
< 0 && errno
== EINTR
);
1077 PERR("[error] Writing in the metadata fp\n");
1078 goto error_free_data
;
1080 assert(ret_len
== len
);
1093 * Assign the fields from a lttng_viewer_index to a packet_index.
1096 void lttng_index_to_packet_index(struct lttng_viewer_index
*lindex
,
1097 struct packet_index
*pindex
)
1102 pindex
->offset
= be64toh(lindex
->offset
);
1103 pindex
->packet_size
= be64toh(lindex
->packet_size
);
1104 pindex
->content_size
= be64toh(lindex
->content_size
);
1105 pindex
->ts_cycles
.timestamp_begin
= be64toh(lindex
->timestamp_begin
);
1106 pindex
->ts_cycles
.timestamp_end
= be64toh(lindex
->timestamp_end
);
1107 pindex
->events_discarded
= be64toh(lindex
->events_discarded
);
1111 enum bt_ctf_lttng_live_iterator_status
lttng_live_get_next_index(struct lttng_live_component
*lttng_live
,
1112 struct lttng_live_stream_iterator
*stream
,
1113 struct packet_index
*index
)
1115 struct lttng_viewer_cmd cmd
;
1116 struct lttng_viewer_get_next_index rq
;
1118 struct lttng_viewer_index rp
;
1119 uint32_t flags
, status
;
1120 enum bt_ctf_lttng_live_iterator_status retstatus
=
1121 BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK
;
1122 struct bt_live_viewer_connection
*viewer_connection
=
1123 lttng_live
->viewer_connection
;
1124 struct lttng_live_trace
*trace
= stream
->trace
;
1126 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEXT_INDEX
);
1127 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1128 cmd
.cmd_version
= htobe32(0);
1130 memset(&rq
, 0, sizeof(rq
));
1131 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1133 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
1135 PERR("Error sending cmd: %s\n", strerror(errno
));
1138 assert(ret_len
== sizeof(cmd
));
1140 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &rq
, sizeof(rq
));
1142 PERR("Error sending get_next_index request: %s\n", strerror(errno
));
1145 assert(ret_len
== sizeof(rq
));
1147 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &rp
, sizeof(rp
));
1149 PERR("Remote side has closed connection\n");
1153 PERR("Error receiving get_next_index response: %s\n", strerror(errno
));
1156 assert(ret_len
== sizeof(rp
));
1158 flags
= be32toh(rp
.flags
);
1159 status
= be32toh(rp
.status
);
1162 case LTTNG_VIEWER_INDEX_INACTIVE
:
1164 uint64_t ctf_stream_class_id
;
1166 PDBG("get_next_index: inactive\n");
1167 memset(index
, 0, sizeof(struct packet_index
));
1168 index
->ts_cycles
.timestamp_end
= be64toh(rp
.timestamp_end
);
1169 stream
->current_inactivity_timestamp
= index
->ts_cycles
.timestamp_end
;
1170 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1171 if (stream
->ctf_stream_class_id
!= -1ULL) {
1172 assert(stream
->ctf_stream_class_id
==
1173 ctf_stream_class_id
);
1175 stream
->ctf_stream_class_id
= ctf_stream_class_id
;
1177 stream
->state
= LTTNG_LIVE_STREAM_QUIESCENT
;
1180 case LTTNG_VIEWER_INDEX_OK
:
1182 uint64_t ctf_stream_class_id
;
1184 PDBG("get_next_index: OK\n");
1185 lttng_index_to_packet_index(&rp
, index
);
1186 ctf_stream_class_id
= be64toh(rp
.stream_id
);
1187 if (stream
->ctf_stream_class_id
!= -1ULL) {
1188 assert(stream
->ctf_stream_class_id
==
1189 ctf_stream_class_id
);
1191 stream
->ctf_stream_class_id
= ctf_stream_class_id
;
1194 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_DATA
;
1195 stream
->current_packet_end_timestamp
=
1196 index
->ts_cycles
.timestamp_end
;
1198 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1199 PDBG("get_next_index: new metadata needed\n");
1200 trace
->new_metadata_needed
= true;
1202 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1203 PDBG("get_next_index: new streams needed\n");
1204 lttng_live_need_new_streams(lttng_live
);
1208 case LTTNG_VIEWER_INDEX_RETRY
:
1209 PDBG("get_next_index: retry\n");
1210 memset(index
, 0, sizeof(struct packet_index
));
1211 retstatus
= BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1212 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
;
1214 case LTTNG_VIEWER_INDEX_HUP
:
1215 PDBG("get_next_index: stream hung up\n");
1216 memset(index
, 0, sizeof(struct packet_index
));
1217 index
->offset
= EOF
;
1218 retstatus
= BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END
;
1219 stream
->state
= LTTNG_LIVE_STREAM_EOF
;
1221 case LTTNG_VIEWER_INDEX_ERR
:
1222 PERR("get_next_index: error\n");
1223 memset(index
, 0, sizeof(struct packet_index
));
1224 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
;
1227 PERR("get_next_index: unkwown value\n");
1228 memset(index
, 0, sizeof(struct packet_index
));
1229 stream
->state
= LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
;
1236 retstatus
= BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1241 enum bt_ctf_notif_iter_medium_status
lttng_live_get_stream_bytes(struct lttng_live_component
*lttng_live
,
1242 struct lttng_live_stream_iterator
*stream
, uint8_t *buf
, uint64_t offset
,
1243 uint64_t req_len
, uint64_t *recv_len
)
1245 enum bt_ctf_notif_iter_medium_status retstatus
= BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK
;
1246 struct lttng_viewer_cmd cmd
;
1247 struct lttng_viewer_get_packet rq
;
1248 struct lttng_viewer_trace_packet rp
;
1250 uint32_t flags
, status
;
1251 struct bt_live_viewer_connection
*viewer_connection
=
1252 lttng_live
->viewer_connection
;
1253 struct lttng_live_trace
*trace
= stream
->trace
;
1255 PDBG("lttng_live_get_stream_bytes: offset=%" PRIu64
", req_len=%" PRIu64
"\n",
1257 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_PACKET
);
1258 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1259 cmd
.cmd_version
= htobe32(0);
1261 memset(&rq
, 0, sizeof(rq
));
1262 rq
.stream_id
= htobe64(stream
->viewer_stream_id
);
1263 rq
.offset
= htobe64(offset
);
1264 rq
.len
= htobe32(req_len
);
1266 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
1268 PERR("Error sending cmd: %s\n", strerror(errno
));
1271 assert(ret_len
== sizeof(cmd
));
1273 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &rq
, sizeof(rq
));
1275 PERR("Error sending get_data request: %s\n", strerror(errno
));
1278 assert(ret_len
== sizeof(rq
));
1280 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &rp
, sizeof(rp
));
1282 PERR("Remote side has closed connection\n");
1286 PERR("Error receiving get_data response: %s\n", strerror(errno
));
1289 if (ret_len
!= sizeof(rp
)) {
1290 PERR("[error] get_data_packet: expected %zu"
1291 ", received %zd\n", sizeof(rp
),
1296 flags
= be32toh(rp
.flags
);
1297 status
= be32toh(rp
.status
);
1300 case LTTNG_VIEWER_GET_PACKET_OK
:
1301 req_len
= be32toh(rp
.len
);
1302 PDBG("get_data_packet: Ok, packet size : %" PRIu64
"\n", req_len
);
1304 case LTTNG_VIEWER_GET_PACKET_RETRY
:
1305 /* Unimplemented by relay daemon */
1306 PDBG("get_data_packet: retry\n");
1307 retstatus
= BT_CTF_NOTIF_ITER_MEDIUM_STATUS_AGAIN
;
1309 case LTTNG_VIEWER_GET_PACKET_ERR
:
1310 if (flags
& LTTNG_VIEWER_FLAG_NEW_METADATA
) {
1311 PDBG("get_data_packet: new metadata needed, try again later\n");
1312 trace
->new_metadata_needed
= true;
1314 if (flags
& LTTNG_VIEWER_FLAG_NEW_STREAM
) {
1315 PDBG("get_data_packet: new streams needed, try again later\n");
1316 lttng_live_need_new_streams(lttng_live
);
1318 if (flags
& (LTTNG_VIEWER_FLAG_NEW_METADATA
1319 | LTTNG_VIEWER_FLAG_NEW_STREAM
)) {
1320 retstatus
= BT_CTF_NOTIF_ITER_MEDIUM_STATUS_AGAIN
;
1323 PERR("get_data_packet: error\n");
1325 case LTTNG_VIEWER_GET_PACKET_EOF
:
1326 retstatus
= BT_CTF_NOTIF_ITER_MEDIUM_STATUS_EOF
;
1329 PDBG("get_data_packet: unknown\n");
1337 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, buf
, req_len
);
1339 PERR("Remote side has closed connection\n");
1343 PERR("Error receiving trace packet: %s\n", strerror(errno
));
1346 assert(ret_len
== req_len
);
1347 *recv_len
= ret_len
;
1352 retstatus
= BT_CTF_NOTIF_ITER_MEDIUM_STATUS_ERROR
;
1357 * Request new streams for a session.
1360 enum bt_ctf_lttng_live_iterator_status
lttng_live_get_new_streams(
1361 struct lttng_live_session
*session
)
1363 enum bt_ctf_lttng_live_iterator_status status
=
1364 BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK
;
1365 struct lttng_viewer_cmd cmd
;
1366 struct lttng_viewer_new_streams_request rq
;
1367 struct lttng_viewer_new_streams_response rp
;
1369 struct lttng_live_component
*lttng_live
= session
->lttng_live
;
1370 struct bt_live_viewer_connection
*viewer_connection
=
1371 lttng_live
->viewer_connection
;
1372 uint32_t streams_count
;
1374 if (!session
->new_streams_needed
) {
1375 return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK
;
1378 cmd
.cmd
= htobe32(LTTNG_VIEWER_GET_NEW_STREAMS
);
1379 cmd
.data_size
= htobe64((uint64_t) sizeof(rq
));
1380 cmd
.cmd_version
= htobe32(0);
1382 memset(&rq
, 0, sizeof(rq
));
1383 rq
.session_id
= htobe64(session
->id
);
1385 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &cmd
, sizeof(cmd
));
1387 PERR("Error sending cmd: %s\n", strerror(errno
));
1390 assert(ret_len
== sizeof(cmd
));
1392 ret_len
= lttng_live_send(viewer_connection
->control_sock
, &rq
, sizeof(rq
));
1394 PERR("Error sending get_new_streams request: %s\n", strerror(errno
));
1397 assert(ret_len
== sizeof(rq
));
1399 ret_len
= lttng_live_recv(viewer_connection
->control_sock
, &rp
, sizeof(rp
));
1401 PERR("Remote side has closed connection\n");
1405 PERR("Error receiving get_new_streams response\n");
1408 assert(ret_len
== sizeof(rp
));
1410 streams_count
= be32toh(rp
.streams_count
);
1412 switch(be32toh(rp
.status
)) {
1413 case LTTNG_VIEWER_NEW_STREAMS_OK
:
1414 session
->new_streams_needed
= false;
1416 case LTTNG_VIEWER_NEW_STREAMS_NO_NEW
:
1417 session
->new_streams_needed
= false;
1419 case LTTNG_VIEWER_NEW_STREAMS_HUP
:
1420 session
->new_streams_needed
= false;
1421 session
->closed
= true;
1422 status
= BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END
;
1424 case LTTNG_VIEWER_NEW_STREAMS_ERR
:
1425 PERR("get_new_streams error\n");
1428 PERR("Unknown return code %u\n", be32toh(rp
.status
));
1432 if (receive_streams(session
, streams_count
)) {
1439 status
= BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1444 struct bt_live_viewer_connection
*
1445 bt_live_viewer_connection_create(const char *url
, FILE *error_fp
)
1447 struct bt_live_viewer_connection
*viewer_connection
;
1449 viewer_connection
= g_new0(struct bt_live_viewer_connection
, 1);
1451 bt_object_init(&viewer_connection
->obj
, connection_release
);
1452 viewer_connection
->control_sock
= -1;
1453 viewer_connection
->port
= -1;
1454 viewer_connection
->error_fp
= error_fp
;
1455 viewer_connection
->url
= g_string_new(url
);
1456 if (!viewer_connection
->url
) {
1460 PDBG("Establishing connection to url \"%s\"...\n", url
);
1461 if (lttng_live_connect_viewer(viewer_connection
)) {
1464 PDBG("Connection to url \"%s\" is established\n", url
);
1465 return viewer_connection
;
1468 printf_verbose("Failure to establish connection to url \"%s\"\n", url
);
1470 g_free(viewer_connection
);
1475 void bt_live_viewer_connection_destroy(struct bt_live_viewer_connection
*viewer_connection
)
1477 PDBG("Closing connection to url \"%s\"\n", viewer_connection
->url
->str
);
1478 lttng_live_disconnect_viewer(viewer_connection
);
1479 g_string_free(viewer_connection
->url
, TRUE
);
1480 g_free(viewer_connection
);