[lttngtop.git] / src / network-live.c

/*
 * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
 *                      Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <inttypes.h>
#include <fcntl.h>
#include <sys/mman.h>

#include "lttng-viewer-abi.h"
#include "network-live.h"
#include "lttng-live-comm.h"

#include <babeltrace/babeltrace.h>
#include <babeltrace/ctf/events.h>
#include <babeltrace/ctf/callbacks.h>
#include <babeltrace/ctf/iterator.h>

/* for packet_index */
#include <babeltrace/ctf/types.h>

#include <babeltrace/ctf/metadata.h>
#include <babeltrace/ctf-text/types.h>
#include <babeltrace/ctf/events-internal.h>
#include <lib/babeltrace/ctf/ctf-index.h>

static volatile int should_quit;

int lttng_live_should_quit(void)
{
	return should_quit;
}

#if 0
static
void sighandler(int sig)
{
	switch (sig) {
	case SIGTERM:
	case SIGINT:
		should_quit = 1;
		break;
	default:
		break;
	}
}

/*
 * TODO: Eventually, this signal handler setup should be done at the
 * plugin manager level, rather than within this plugin. Beware, we are
 * not cleaning up the signal handler after plugin execution.
 */
static
int setup_sighandler(void)
{
	struct sigaction sa;
	sigset_t sigset;
	int ret;

	if ((ret = sigemptyset(&sigset)) < 0) {
		perror("sigemptyset");
		return ret;
	}
	sa.sa_handler = sighandler;
	sa.sa_mask = sigset;
	sa.sa_flags = 0;
	if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) {
		perror("sigaction");
		return ret;
	}
	if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) {
		perror("sigaction");
		return ret;
	}
	return 0;
}
#endif

/*
 * hostname parameter needs to hold NAME_MAX chars.
 */
static
int parse_url(const char *path, struct lttng_live_ctx *ctx)
{
	char remain[3][NAME_MAX];
	int ret = -1, proto, proto_offset = 0;
	size_t path_len = strlen(path); /* not accounting \0 */

	/*
	 * Since sscanf API does not allow easily checking string length
	 * against a size defined by a macro. Test it beforehand on the
	 * input. We know the output is always <= than the input length.
	 */
	if (path_len >= NAME_MAX) {
		goto end;
	}
	ret = sscanf(path, "net%d://", &proto);
	if (ret < 1) {
		proto = 4;
		/* net:// */
		proto_offset = strlen("net://");
	} else {
		/* net4:// or net6:// */
		proto_offset = strlen("netX://");
	}
	if (proto_offset > path_len) {
		goto end;
	}
	/* TODO : parse for IPv6 as well */
	/* Parse the hostname or IP */
	ret = sscanf(&path[proto_offset], "%[a-zA-Z.0-9%-]%s",
		ctx->relay_hostname, remain[0]);
	if (ret == 2) {
		/* Optional port number */
		switch (remain[0][0]) {
		case ':':
			ret = sscanf(remain[0], ":%d%s", &ctx->port, remain[1]);
			/* Optional session ID with port number */
			if (ret == 2) {
				ret = sscanf(remain[1], "/%s", remain[2]);
				/* Accept 0 or 1 (optional) */
				if (ret < 0) {
					goto end;
				}
			} else if (ret == 0) {
				fprintf(stderr, "[error] Missing port number after delimitor ':'\n");
				ret = -1;
				goto end;
			}
			break;
		case '/':
			/* Optional session ID */
			ret = sscanf(remain[0], "/%s", remain[2]);
			/* Accept 0 or 1 (optional) */
			if (ret < 0) {
				goto end;
			}
			break;
		default:
			fprintf(stderr, "[error] wrong delimitor : %c\n",
				remain[0][0]);
			ret = -1;
			goto end;
		}
	}

	if (ctx->port < 0) {
		ctx->port = LTTNG_DEFAULT_NETWORK_VIEWER_PORT;
	}

	if (strlen(remain[2]) == 0) {
		printf_verbose("Connecting to hostname : %s, port : %d, "
				"proto : IPv%d\n",
				ctx->relay_hostname, ctx->port, proto);
		ret = 0;
		goto end;
	}
	ret = sscanf(remain[2], "host/%[a-zA-Z.0-9%-]/%s",
			ctx->traced_hostname, ctx->session_name);
	if (ret != 2) {
		fprintf(stderr, "[error] Format : "
			"net://<hostname>/host/<traced_hostname>/<session_name>\n");
		goto end;
	}

	printf_verbose("Connecting to hostname : %s, port : %d, "
			"traced hostname : %s, session name : %s, "
			"proto : IPv%d\n",
			ctx->relay_hostname, ctx->port, ctx->traced_hostname,
			ctx->session_name, proto);
	ret = 0;

end:
	return ret;
}

static int lttng_live_open_trace_read(const char *path)
{
	int ret = 0;
	struct lttng_live_ctx *ctx;

	ctx = g_new0(struct lttng_live_ctx, 1);
	ctx->session = g_new0(struct lttng_live_session, 1);

	/* We need a pointer to the context from the packet_seek function. */
	ctx->session->ctx = ctx;

	/* HT to store the CTF traces. */
	ctx->session->ctf_traces = g_hash_table_new(g_direct_hash,
			g_direct_equal);
	ctx->port = -1;
	ctx->session_ids = g_array_new(FALSE, TRUE, sizeof(uint64_t));

	ret = parse_url(path, ctx);
	if (ret < 0) {
		goto end_free;
	}
#if 0
	ret = setup_sighandler();
	if (ret < 0) {
		goto end_free;
	}
#endif
	ret = lttng_live_connect_viewer(ctx);
	if (ret < 0) {
		goto end_free;
	}
	printf_verbose("LTTng-live connected to relayd\n");

	ret = lttng_live_establish_connection(ctx);
	if (ret < 0) {
		goto end_free;
	}

	printf_verbose("Listing sessions\n");
	ret = lttng_live_list_sessions(ctx, path);
	if (ret < 0) {
		goto end_free;
	}

	if (ctx->session_ids->len > 0) {
		ret = lttng_live_read(ctx);
	}

end_free:
	g_hash_table_destroy(ctx->session->ctf_traces);
	g_free(ctx->session);
	g_free(ctx->session->streams);
	g_free(ctx);

	if (lttng_live_should_quit()) {
		ret = 0;
	}
	return ret;
}

static
struct bt_trace_descriptor *lttng_live_open_trace(const char *path, int flags,
		void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
			int whence), FILE *metadata_fp)
{
	struct ctf_text_stream_pos *pos;

	switch (flags & O_ACCMODE) {
	case O_RDONLY:
		/* OK */
		break;
	case O_RDWR:
		fprintf(stderr, "[error] lttng live plugin cannot be used as output plugin.\n");
		goto error;
	default:
		fprintf(stderr, "[error] Incorrect open flags.\n");
		goto error;
	}

	pos = g_new0(struct ctf_text_stream_pos, 1);
	pos->parent.rw_table = NULL;
	pos->parent.event_cb = NULL;
	pos->parent.trace = &pos->trace_descriptor;
	if (lttng_live_open_trace_read(path) < 0) {
		goto error;
	}
	return &pos->trace_descriptor;

error:
	return NULL;
}

static
int lttng_live_close_trace(struct bt_trace_descriptor *td)
{
	struct ctf_text_stream_pos *pos =
		container_of(td, struct ctf_text_stream_pos,
			trace_descriptor);
	free(pos);
	return 0;
}

static
struct bt_format lttng_live_format = {
	.open_trace = lttng_live_open_trace,
	.close_trace = lttng_live_close_trace,
};

static
void __attribute__((constructor)) lttng_live_init(void)
{
	int ret;

	lttng_live_format.name = g_quark_from_static_string("lttng-live");
	ret = bt_register_format(&lttng_live_format);
	assert(!ret);
}

static
void __attribute__((destructor)) lttng_live_exit(void)
{
	bt_unregister_format(&lttng_live_format);
}
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
	3	* Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	4	*
	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:
	11	*
	12	* The above copyright notice and this permission notice shall be included in
	13	* all copies or substantial portions of the Software.
	14	*
	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
	21	* SOFTWARE.
	22	*/
	23
	24	#include <sys/socket.h>
	25	#include <sys/types.h>
	26	#include <netinet/in.h>
	27	#include <netdb.h>
	28	#include <stdio.h>
	29	#include <string.h>
	30	#include <stdlib.h>
	31	#include <unistd.h>
	32	#include <errno.h>
	33	#include <inttypes.h>
	34	#include <fcntl.h>
	35	#include <sys/mman.h>
	36
	37	#include "lttng-viewer-abi.h"
	38	#include "network-live.h"
	39	#include "lttng-live-comm.h"
	40
	41	#include <babeltrace/babeltrace.h>
	42	#include <babeltrace/ctf/events.h>
	43	#include <babeltrace/ctf/callbacks.h>
	44	#include <babeltrace/ctf/iterator.h>
	45
	46	/* for packet_index */
	47	#include <babeltrace/ctf/types.h>
	48
	49	#include <babeltrace/ctf/metadata.h>
	50	#include <babeltrace/ctf-text/types.h>
	51	#include <babeltrace/ctf/events-internal.h>
	52	#include <lib/babeltrace/ctf/ctf-index.h>
	53
	54	static volatile int should_quit;
	55
	56	int lttng_live_should_quit(void)
	57	{
	58	return should_quit;
	59	}
	60
	61	#if 0
	62	static
	63	void sighandler(int sig)
	64	{
	65	switch (sig) {
	66	case SIGTERM:
	67	case SIGINT:
	68	should_quit = 1;
	69	break;
	70	default:
	71	break;
	72	}
	73	}
	74
	75	/*
	76	* TODO: Eventually, this signal handler setup should be done at the
	77	* plugin manager level, rather than within this plugin. Beware, we are
	78	* not cleaning up the signal handler after plugin execution.
	79	*/
	80	static
	81	int setup_sighandler(void)
	82	{
	83	struct sigaction sa;
	84	sigset_t sigset;
	85	int ret;
	86
	87	if ((ret = sigemptyset(&sigset)) < 0) {
	88	perror("sigemptyset");
	89	return ret;
	90	}
	91	sa.sa_handler = sighandler;
	92	sa.sa_mask = sigset;
	93	sa.sa_flags = 0;
	94	if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) {
	95	perror("sigaction");
	96	return ret;
	97	}
	98	if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) {
	99	perror("sigaction");
	100	return ret;
	101	}
	102	return 0;
	103	}
	104	#endif
	105
	106	/*
	107	* hostname parameter needs to hold NAME_MAX chars.
	108	*/
	109	static
	110	int parse_url(const char path, struct lttng_live_ctx ctx)
	111	{
	112	char remain[3][NAME_MAX];
	113	int ret = -1, proto, proto_offset = 0;
	114	size_t path_len = strlen(path); /* not accounting \0 */
	115
	116	/*
	117	* Since sscanf API does not allow easily checking string length
	118	* against a size defined by a macro. Test it beforehand on the
	119	* input. We know the output is always <= than the input length.
	120	*/
	121	if (path_len >= NAME_MAX) {
	122	goto end;
	123	}
	124	ret = sscanf(path, "net%d://", &proto);
	125	if (ret < 1) {
	126	proto = 4;
	127	/* net:// */
	128	proto_offset = strlen("net://");
	129	} else {
	130	/* net4:// or net6:// */
	131	proto_offset = strlen("netX://");
	132	}
	133	if (proto_offset > path_len) {
	134	goto end;
	135	}
	136	/* TODO : parse for IPv6 as well */
	137	/* Parse the hostname or IP */
	138	ret = sscanf(&path[proto_offset], "%[a-zA-Z.0-9%-]%s",
	139	ctx->relay_hostname, remain[0]);
	140	if (ret == 2) {
	141	/* Optional port number */
	142	switch (remain[0][0]) {
	143	case ':':
	144	ret = sscanf(remain[0], ":%d%s", &ctx->port, remain[1]);
	145	/* Optional session ID with port number */
	146	if (ret == 2) {
	147	ret = sscanf(remain[1], "/%s", remain[2]);
	148	/* Accept 0 or 1 (optional) */
	149	if (ret < 0) {
	150	goto end;
	151	}
	152	} else if (ret == 0) {
	153	fprintf(stderr, "[error] Missing port number after delimitor ':'\n");
	154	ret = -1;
	155	goto end;
	156	}
	157	break;
	158	case '/':
	159	/* Optional session ID */
	160	ret = sscanf(remain[0], "/%s", remain[2]);
	161	/* Accept 0 or 1 (optional) */
	162	if (ret < 0) {
	163	goto end;
	164	}
	165	break;
	166	default:
	167	fprintf(stderr, "[error] wrong delimitor : %c\n",
	168	remain[0][0]);
	169	ret = -1;
	170	goto end;
	171	}
	172	}
	173
	174	if (ctx->port < 0) {
	175	ctx->port = LTTNG_DEFAULT_NETWORK_VIEWER_PORT;
	176	}
	177
	178	if (strlen(remain[2]) == 0) {
	179	printf_verbose("Connecting to hostname : %s, port : %d, "
	180	"proto : IPv%d\n",
	181	ctx->relay_hostname, ctx->port, proto);
	182	ret = 0;
	183	goto end;
	184	}
	185	ret = sscanf(remain[2], "host/%[a-zA-Z.0-9%-]/%s",
	186	ctx->traced_hostname, ctx->session_name);
	187	if (ret != 2) {
	188	fprintf(stderr, "[error] Format : "
	189	"net://<hostname>/host/<traced_hostname>/<session_name>\n");
	190	goto end;
	191	}
	192
	193	printf_verbose("Connecting to hostname : %s, port : %d, "
	194	"traced hostname : %s, session name : %s, "
	195	"proto : IPv%d\n",
	196	ctx->relay_hostname, ctx->port, ctx->traced_hostname,
	197	ctx->session_name, proto);
	198	ret = 0;
	199
	200	end:
	201	return ret;
	202	}
	203
	204	static int lttng_live_open_trace_read(const char *path)
	205	{
	206	int ret = 0;
	207	struct lttng_live_ctx *ctx;
	208
	209	ctx = g_new0(struct lttng_live_ctx, 1);
	210	ctx->session = g_new0(struct lttng_live_session, 1);
	211
	212	/* We need a pointer to the context from the packet_seek function. */
	213	ctx->session->ctx = ctx;
	214
	215	/* HT to store the CTF traces. */
	216	ctx->session->ctf_traces = g_hash_table_new(g_direct_hash,
	217	g_direct_equal);
	218	ctx->port = -1;
	219	ctx->session_ids = g_array_new(FALSE, TRUE, sizeof(uint64_t));
	220
	221	ret = parse_url(path, ctx);
	222	if (ret < 0) {
	223	goto end_free;
	224	}
	225	#if 0
	226	ret = setup_sighandler();
	227	if (ret < 0) {
	228	goto end_free;
	229	}
	230	#endif
	231	ret = lttng_live_connect_viewer(ctx);
	232	if (ret < 0) {
	233	goto end_free;
	234	}
	235	printf_verbose("LTTng-live connected to relayd\n");
	236
	237	ret = lttng_live_establish_connection(ctx);
	238	if (ret < 0) {
	239	goto end_free;
	240	}
	241
	242	printf_verbose("Listing sessions\n");
	243	ret = lttng_live_list_sessions(ctx, path);
	244	if (ret < 0) {
	245	goto end_free;
	246	}
	247
	248	if (ctx->session_ids->len > 0) {
	249	ret = lttng_live_read(ctx);
	250	}
	251
	252	end_free:
	253	g_hash_table_destroy(ctx->session->ctf_traces);
	254	g_free(ctx->session);
	255	g_free(ctx->session->streams);
	256	g_free(ctx);
	257
	258	if (lttng_live_should_quit()) {
	259	ret = 0;
	260	}
	261	return ret;
	262	}
	263
	264	static
	265	struct bt_trace_descriptor lttng_live_open_trace(const char path, int flags,
	266	void (packet_seek)(struct bt_stream_pos pos, size_t index,
	267	int whence), FILE *metadata_fp)
	268	{
	269	struct ctf_text_stream_pos *pos;
	270
	271	switch (flags & O_ACCMODE) {
	272	case O_RDONLY:
	273	/* OK */
	274	break;
	275	case O_RDWR:
	276	fprintf(stderr, "[error] lttng live plugin cannot be used as output plugin.\n");
	277	goto error;
	278	default:
	279	fprintf(stderr, "[error] Incorrect open flags.\n");
	280	goto error;
	281	}
	282
	283	pos = g_new0(struct ctf_text_stream_pos, 1);
	284	pos->parent.rw_table = NULL;
	285	pos->parent.event_cb = NULL;
	286	pos->parent.trace = &pos->trace_descriptor;
	287	if (lttng_live_open_trace_read(path) < 0) {
	288	goto error;
	289	}
	290	return &pos->trace_descriptor;
	291
	292	error:
	293	return NULL;
	294	}
	295
	296	static
	297	int lttng_live_close_trace(struct bt_trace_descriptor *td)
	298	{
	299	struct ctf_text_stream_pos *pos =
	300	container_of(td, struct ctf_text_stream_pos,
	301	trace_descriptor);
	302	free(pos);
	303	return 0;
	304	}
	305
	306	static
	307	struct bt_format lttng_live_format = {
	308	.open_trace = lttng_live_open_trace,
	309	.close_trace = lttng_live_close_trace,
	310	};
	311
	312	static
	313	void __attribute__((constructor)) lttng_live_init(void)
	314	{
	315	int ret;
	316
	317	lttng_live_format.name = g_quark_from_static_string("lttng-live");
	318	ret = bt_register_format(&lttng_live_format);
	319	assert(!ret);
	320	}
	321
	322	static
	323	void __attribute__((destructor)) lttng_live_exit(void)
	324	{
	325	bt_unregister_format(&lttng_live_format);
	326	}