2 * BabelTrace - LTTng live Output
4 * Copyright 2013 Julien Desfossez <jdesfossez@efficios.com>
5 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
26 #include <babeltrace/ctf-text/types.h>
27 #include <babeltrace/format.h>
28 #include <babeltrace/babeltrace-internal.h>
32 #include <sys/types.h>
39 #include "lttng-live.h"
42 * hostname parameter needs to hold NAME_MAX chars.
45 int parse_url(const char *path
, struct lttng_live_ctx
*ctx
)
47 char remain
[3][NAME_MAX
];
48 int ret
= -1, proto
, proto_offset
= 0;
49 size_t path_len
= strlen(path
); /* not accounting \0 */
52 * Since sscanf API does not allow easily checking string length
53 * against a size defined by a macro. Test it beforehand on the
54 * input. We know the output is always <= than the input length.
56 if (path_len
>= NAME_MAX
) {
59 ret
= sscanf(path
, "net%d://", &proto
);
63 proto_offset
= strlen("net://");
65 /* net4:// or net6:// */
66 proto_offset
= strlen("netX://");
68 if (proto_offset
> path_len
) {
71 /* TODO : parse for IPv6 as well */
72 /* Parse the hostname or IP */
73 ret
= sscanf(&path
[proto_offset
], "%[a-zA-Z.0-9%-]%s",
74 ctx
->relay_hostname
, remain
[0]);
76 /* Optional port number */
77 switch (remain
[0][0]) {
79 ret
= sscanf(remain
[0], ":%d%s", &ctx
->port
, remain
[1]);
80 /* Optional session ID with port number */
82 ret
= sscanf(remain
[1], "/%s", remain
[2]);
83 /* Accept 0 or 1 (optional) */
90 /* Optional session ID */
91 ret
= sscanf(remain
[0], "/%s", remain
[2]);
92 /* Accept 0 or 1 (optional) */
98 fprintf(stderr
, "[error] wrong delimitor : %c\n",
106 ctx
->port
= LTTNG_DEFAULT_NETWORK_VIEWER_PORT
;
109 if (strlen(remain
[2]) == 0) {
110 printf_verbose("Connecting to hostname : %s, port : %d, "
112 ctx
->relay_hostname
, ctx
->port
, proto
);
116 ret
= sscanf(remain
[2], "host/%[a-zA-Z.0-9%-]/%s",
117 ctx
->traced_hostname
, ctx
->session_name
);
119 fprintf(stderr
, "[error] Format : "
120 "net://<hostname>/host/<traced_hostname>/<session_name>\n");
124 printf_verbose("Connecting to hostname : %s, port : %d, "
125 "traced hostname : %s, session name : %s, "
127 ctx
->relay_hostname
, ctx
->port
, ctx
->traced_hostname
,
128 ctx
->session_name
, proto
);
135 static int lttng_live_open_trace_read(const char *path
)
138 struct lttng_live_ctx
*ctx
;
140 ctx
= g_new0(struct lttng_live_ctx
, 1);
141 ctx
->session
= g_new0(struct lttng_live_session
, 1);
143 /* We need a pointer to the context from the packet_seek function. */
144 ctx
->session
->ctx
= ctx
;
146 /* HT to store the CTF traces. */
147 ctx
->session
->ctf_traces
= g_hash_table_new(g_direct_hash
,
150 ctx
->session_ids
= g_array_new(FALSE
, TRUE
, sizeof(uint64_t));
152 ret
= parse_url(path
, ctx
);
157 ret
= lttng_live_connect_viewer(ctx
);
159 fprintf(stderr
, "[error] Connection failed\n");
162 printf_verbose("LTTng-live connected to relayd\n");
164 ret
= lttng_live_establish_connection(ctx
);
169 printf_verbose("Listing sessions\n");
170 ret
= lttng_live_list_sessions(ctx
, path
);
172 fprintf(stderr
, "[error] List error\n");
176 if (ctx
->session_ids
->len
> 0) {
177 lttng_live_read(ctx
);
181 g_hash_table_destroy(ctx
->session
->ctf_traces
);
182 g_free(ctx
->session
);
183 g_free(ctx
->session
->streams
);
189 struct bt_trace_descriptor
*lttng_live_open_trace(const char *path
, int flags
,
190 void (*packet_seek
)(struct bt_stream_pos
*pos
, size_t index
,
191 int whence
), FILE *metadata_fp
)
193 struct ctf_text_stream_pos
*pos
;
195 switch (flags
& O_ACCMODE
) {
200 fprintf(stderr
, "[error] lttng live plugin cannot be used as output plugin.\n");
203 fprintf(stderr
, "[error] Incorrect open flags.\n");
207 pos
= g_new0(struct ctf_text_stream_pos
, 1);
208 pos
->parent
.rw_table
= NULL
;
209 pos
->parent
.event_cb
= NULL
;
210 pos
->parent
.trace
= &pos
->trace_descriptor
;
211 lttng_live_open_trace_read(path
);
212 return &pos
->trace_descriptor
;
219 int lttng_live_close_trace(struct bt_trace_descriptor
*td
)
221 struct ctf_text_stream_pos
*pos
=
222 container_of(td
, struct ctf_text_stream_pos
,
229 struct bt_format lttng_live_format
= {
230 .open_trace
= lttng_live_open_trace
,
231 .close_trace
= lttng_live_close_trace
,
235 void __attribute__((constructor
)) lttng_live_init(void)
239 lttng_live_format
.name
= g_quark_from_static_string("lttng-live");
240 ret
= bt_register_format(<tng_live_format
);
245 void __attribute__((destructor
)) lttng_live_exit(void)
247 bt_unregister_format(<tng_live_format
);