Commit | Line | Data |
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4a744367 JD |
1 | /* |
2 | * BabelTrace - LTTng live Output | |
3 | * | |
4 | * Copyright 2013 Julien Desfossez <jdesfossez@efficios.com> | |
5 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
6 | * | |
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: | |
13 | * | |
14 | * The above copyright notice and this permission notice shall be included in | |
15 | * all copies or substantial portions of the Software. | |
16 | * | |
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 | |
23 | * SOFTWARE. | |
24 | */ | |
25 | ||
26 | #include <babeltrace/ctf-text/types.h> | |
27 | #include <babeltrace/format.h> | |
28 | #include <babeltrace/babeltrace-internal.h> | |
29 | #include <inttypes.h> | |
30 | #include <sys/mman.h> | |
31 | #include <errno.h> | |
32 | #include <sys/types.h> | |
33 | #include <sys/stat.h> | |
34 | #include <fcntl.h> | |
35 | #include <dirent.h> | |
36 | #include <glib.h> | |
37 | #include <unistd.h> | |
38 | #include <stdlib.h> | |
39 | #include "lttng-live-functions.h" | |
40 | ||
e84d6f79 MD |
41 | /* |
42 | * hostname parameter needs to hold NAME_MAX chars. | |
43 | */ | |
4a744367 JD |
44 | static int parse_url(const char *path, char *hostname, int *port, |
45 | uint64_t *session_id) | |
46 | { | |
e84d6f79 MD |
47 | char remain[2][NAME_MAX]; |
48 | int ret = -1, proto, proto_offset = 0; | |
49 | size_t path_len = strlen(path); | |
4a744367 | 50 | |
e84d6f79 MD |
51 | /* |
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. | |
55 | */ | |
56 | if (path_len > NAME_MAX) { | |
57 | goto end; | |
58 | } | |
59 | ret = sscanf(path, "net%d://", &proto); | |
60 | if (ret < 1) { | |
4a744367 JD |
61 | proto = 4; |
62 | /* net:// */ | |
63 | proto_offset = strlen("net://"); | |
64 | } else { | |
65 | /* net4:// or net6:// */ | |
66 | proto_offset = strlen("netX://"); | |
67 | } | |
e84d6f79 MD |
68 | if (proto_offset > path_len) { |
69 | goto end; | |
70 | } | |
4a744367 JD |
71 | /* TODO : parse for IPv6 as well */ |
72 | /* Parse the hostname or IP */ | |
e84d6f79 MD |
73 | ret = sscanf(&path[proto_offset], "%[a-zA-Z.0-9%-]%s", |
74 | hostname, remain[0]); | |
4a744367 JD |
75 | if (ret == 2) { |
76 | /* Optional port number */ | |
e84d6f79 MD |
77 | switch (remain[0][0]) { |
78 | case ':': | |
79 | ret = sscanf(remain[0], ":%d%s", port, remain[1]); | |
4a744367 JD |
80 | /* Optional session ID with port number */ |
81 | if (ret == 2) { | |
e84d6f79 MD |
82 | ret = sscanf(remain[1], "/%" PRIu64, |
83 | session_id); | |
84 | /* Accept 0 or 1 (optional) */ | |
85 | if (ret < 0) { | |
86 | goto end; | |
87 | } | |
4a744367 | 88 | } |
e84d6f79 MD |
89 | break; |
90 | case '/': | |
4a744367 | 91 | /* Optional session ID */ |
e84d6f79 MD |
92 | ret = sscanf(remain[0], "/%" PRIu64, session_id); |
93 | /* Accept 0 or 1 (optional) */ | |
94 | if (ret < 0) { | |
95 | goto end; | |
96 | } | |
97 | break; | |
98 | default: | |
4a744367 | 99 | fprintf(stderr, "[error] wrong delimitor : %c\n", |
e84d6f79 | 100 | remain[0][0]); |
4a744367 JD |
101 | ret = -1; |
102 | goto end; | |
103 | } | |
104 | } | |
105 | ||
106 | if (*port < 0) | |
107 | *port = LTTNG_DEFAULT_NETWORK_VIEWER_PORT; | |
108 | ||
109 | if (*session_id == -1ULL) | |
110 | printf_verbose("Connecting to hostname : %s, port : %d, " | |
111 | "proto : IPv%d\n", | |
112 | hostname, *port, proto); | |
113 | else | |
114 | printf_verbose("Connecting to hostname : %s, port : %d, " | |
115 | "session id : %" PRIu64 ", proto : IPv%d\n", | |
116 | hostname, *port, *session_id, proto); | |
117 | ret = 0; | |
118 | ||
119 | end: | |
120 | return ret; | |
121 | } | |
122 | ||
123 | static int lttng_live_open_trace_read(const char *path) | |
124 | { | |
125 | char hostname[NAME_MAX]; | |
126 | int port = -1; | |
127 | uint64_t session_id = -1ULL; | |
128 | int ret = 0; | |
129 | struct lttng_live_ctx ctx; | |
130 | ||
4a744367 | 131 | ctx.session = g_new0(struct lttng_live_session, 1); |
3af4fc48 | 132 | |
4a744367 JD |
133 | /* We need a pointer to the context from the packet_seek function. */ |
134 | ctx.session->ctx = &ctx; | |
135 | ||
136 | /* HT to store the CTF traces. */ | |
137 | ctx.session->ctf_traces = g_hash_table_new(g_direct_hash, | |
138 | g_direct_equal); | |
139 | ||
140 | ret = parse_url(path, hostname, &port, &session_id); | |
141 | if (ret < 0) { | |
142 | goto end_free; | |
143 | } | |
144 | ||
145 | ret = lttng_live_connect_viewer(&ctx, hostname, port); | |
146 | if (ret < 0) { | |
147 | fprintf(stderr, "[error] Connection failed\n"); | |
148 | goto end_free; | |
149 | } | |
150 | printf_verbose("LTTng-live connected to relayd\n"); | |
151 | ||
152 | ret = lttng_live_establish_connection(&ctx); | |
153 | if (ret < 0) { | |
154 | goto end_free; | |
155 | } | |
156 | ||
157 | if (session_id == -1ULL) { | |
158 | printf_verbose("Listing sessions\n"); | |
159 | ret = lttng_live_list_sessions(&ctx, path); | |
160 | if (ret < 0) { | |
161 | fprintf(stderr, "[error] List error\n"); | |
162 | goto end_free; | |
163 | } | |
164 | } else { | |
165 | lttng_live_read(&ctx, session_id); | |
166 | } | |
167 | ||
168 | end_free: | |
169 | g_hash_table_destroy(ctx.session->ctf_traces); | |
170 | g_free(ctx.session); | |
4a744367 JD |
171 | g_free(ctx.session->streams); |
172 | return ret; | |
173 | } | |
174 | ||
175 | static | |
176 | struct bt_trace_descriptor *lttng_live_open_trace(const char *path, int flags, | |
177 | void (*packet_seek)(struct bt_stream_pos *pos, size_t index, | |
178 | int whence), FILE *metadata_fp) | |
179 | { | |
180 | struct ctf_text_stream_pos *pos; | |
181 | ||
182 | switch (flags & O_ACCMODE) { | |
183 | case O_RDONLY: | |
184 | /* OK */ | |
185 | break; | |
186 | case O_RDWR: | |
187 | fprintf(stderr, "[error] lttng live plugin cannot be used as output plugin.\n"); | |
188 | goto error; | |
189 | default: | |
190 | fprintf(stderr, "[error] Incorrect open flags.\n"); | |
191 | goto error; | |
192 | } | |
193 | ||
194 | pos = g_new0(struct ctf_text_stream_pos, 1); | |
195 | pos->parent.rw_table = NULL; | |
196 | pos->parent.event_cb = NULL; | |
197 | pos->parent.trace = &pos->trace_descriptor; | |
198 | lttng_live_open_trace_read(path); | |
199 | return &pos->trace_descriptor; | |
200 | ||
201 | error: | |
202 | return NULL; | |
203 | } | |
204 | ||
205 | static | |
206 | int lttng_live_close_trace(struct bt_trace_descriptor *td) | |
207 | { | |
208 | struct ctf_text_stream_pos *pos = | |
209 | container_of(td, struct ctf_text_stream_pos, | |
210 | trace_descriptor); | |
211 | free(pos); | |
212 | return 0; | |
213 | } | |
214 | ||
215 | static | |
216 | struct bt_format lttng_live_format = { | |
217 | .open_trace = lttng_live_open_trace, | |
218 | .close_trace = lttng_live_close_trace, | |
219 | }; | |
220 | ||
221 | static | |
222 | void __attribute__((constructor)) lttng_live_init(void) | |
223 | { | |
224 | int ret; | |
225 | ||
226 | lttng_live_format.name = g_quark_from_static_string("lttng-live"); | |
227 | ret = bt_register_format(<tng_live_format); | |
228 | assert(!ret); | |
229 | } | |
230 | ||
231 | static | |
232 | void __attribute__((destructor)) lttng_live_exit(void) | |
233 | { | |
234 | bt_unregister_format(<tng_live_format); | |
235 | } |