[lttng-tools.git] / src / bin / lttng-relayd / cmd-2-11.c

/*
 * Copyright (C) 2018 - Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License, version 2 only, as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#define _LGPL_SOURCE
#include <assert.h>
#include <inttypes.h>

#include <common/common.h>
#include <common/sessiond-comm/relayd.h>

#include <common/compat/endian.h>
#include <common/compat/string.h>
#include <lttng/constant.h>

#include "cmd-2-11.h"
#include "utils.h"

int cmd_create_session_2_11(const struct lttng_buffer_view *payload,
		char *session_name, char *hostname,
		uint32_t *live_timer, bool *snapshot)
{
	int ret;
	struct lttcomm_relayd_create_session_2_11 header;
	size_t header_len, received_names_size;
	struct lttng_buffer_view session_name_view;
	struct lttng_buffer_view hostname_view;

	header_len = sizeof(header);

	if (payload->size < header_len) {
		ERR("Unexpected payload size in \"cmd_create_session_2_11\": expected >= %zu bytes, got %zu bytes",
				header_len, payload->size);
		ret = -1;
		goto error;
	}
	memcpy(&header, payload->data, header_len);

	header.session_name_len = be32toh(header.session_name_len);
	header.hostname_len = be32toh(header.hostname_len);
	header.live_timer = be32toh(header.live_timer);

	received_names_size = header.session_name_len + header.hostname_len;
	if (payload->size < header_len + received_names_size) {
		ERR("Unexpected payload size in \"cmd_create_session_2_11\": expected >= %zu bytes, got %zu bytes",
				header_len + received_names_size, payload->size);
		ret = -1;
		goto error;
	}

	/* Validate length against defined constant. */
	if (header.session_name_len > LTTNG_NAME_MAX) {
		ret = -ENAMETOOLONG;
		ERR("Length of session name (%" PRIu32 " bytes) received in create_session command exceeds maximum length (%d bytes)", header.session_name_len, LTTNG_NAME_MAX);
		goto error;
	}
	if (header.hostname_len > LTTNG_HOST_NAME_MAX) {
		ret = -ENAMETOOLONG;
		ERR("Length of hostname (%" PRIu32 " bytes) received in create_session command exceeds maximum length (%d bytes)", header.hostname_len, LTTNG_HOST_NAME_MAX);
		goto error;
	}

	session_name_view = lttng_buffer_view_from_view(payload, header_len,
			header.session_name_len);
	hostname_view = lttng_buffer_view_from_view(payload,
			header_len + header.session_name_len, header.hostname_len);

	/* Validate that names are NULL terminated. */
	if (session_name_view.data[session_name_view.size - 1] != '\0') {
		ERR("cmd_create_session_2_11 session_name is invalid (not NULL terminated)");
		ret = -1;
		goto error;
	}

	if (hostname_view.data[hostname_view.size - 1] != '\0') {
		ERR("cmd_create_session_2_11 hostname is invalid (not NULL terminated)");
		ret = -1;
		goto error;
	}

	/*
	 * Length and null-termination check are already performed.
	 * LTTNG_NAME_MAX and LTTNG_HOST_NAME_MAX max size are expected.
	 */
	strcpy(session_name, session_name_view.data);
	strcpy(hostname, hostname_view.data);

	*live_timer = header.live_timer;
	*snapshot = !!header.snapshot;

	ret = 0;

error:
	return ret;
}

/*
 * cmd_recv_stream_2_11 allocates path_name and channel_name.
 */
int cmd_recv_stream_2_11(const struct lttng_buffer_view *payload,
		char **ret_path_name, char **ret_channel_name,
		uint64_t *tracefile_size, uint64_t *tracefile_count)
{
	int ret;
	struct lttcomm_relayd_add_stream_2_11 header;
	size_t header_len, received_names_size;
	struct lttng_buffer_view channel_name_view;
	struct lttng_buffer_view pathname_view;
	char *path_name = NULL;
	char *channel_name = NULL;

	header_len = sizeof(header);

	if (payload->size < header_len) {
		ERR("Unexpected payload size in \"cmd_recv_stream_2_11\": expected >= %zu bytes, got %zu bytes",
				header_len, payload->size);
		ret = -1;
		goto error;
	}
	memcpy(&header, payload->data, header_len);

	header.channel_name_len = be32toh(header.channel_name_len);
	header.pathname_len = be32toh(header.pathname_len);
	header.tracefile_size = be64toh(header.tracefile_size);
	header.tracefile_count = be64toh(header.tracefile_count);

	received_names_size = header.channel_name_len + header.pathname_len;
	if (payload->size < header_len + received_names_size) {
		ERR("Unexpected payload size in \"cmd_recv_stream_2_11\": expected >= %zu bytes, got %zu bytes",
				header_len + received_names_size, payload->size);
		ret = -1;
		goto error;
	}

	/* Validate length against defined constant. */
	if (header.channel_name_len > DEFAULT_STREAM_NAME_LEN) {
		ret = -ENAMETOOLONG;
		ERR("Channel name too long");
		goto error;
	}
	if (header.pathname_len > LTTNG_NAME_MAX) {
		ret = -ENAMETOOLONG;
		ERR("Pathname too long");
		goto error;
	}

	/* Validate that names are (NULL terminated. */
	channel_name_view = lttng_buffer_view_from_view(payload, header_len,
			    header.channel_name_len);
	pathname_view = lttng_buffer_view_from_view(payload,
			header_len + header.channel_name_len, header.pathname_len);

	if (channel_name_view.data[channel_name_view.size - 1] != '\0') {
		ERR("cmd_recv_stream_2_11 channel_name is invalid (not NULL terminated)");
		ret = -1;
		goto error;
	}

	if (pathname_view.data[pathname_view.size - 1] != '\0') {
		ERR("cmd_recv_stream_2_11 patname is invalid (not NULL terminated)");
		ret = -1;
		goto error;
	}

	channel_name = strdup(channel_name_view.data);
	if (!channel_name) {
		ret = -errno;
		PERROR("Channel name allocation");
		goto error;
	}

	path_name = create_output_path(pathname_view.data);
	if (!path_name) {
		PERROR("Path name allocation");
		ret = -ENOMEM;
		goto error;
	}

	*tracefile_size = header.tracefile_size;
	*tracefile_count = header.tracefile_count;
	*ret_path_name = path_name;
	*ret_channel_name = channel_name;
	/* Move ownership to caller */
	path_name = NULL;
	channel_name = NULL;
	ret = 0;
error:
	free(channel_name);
	free(path_name);
	return ret;
}
Commit	Line	Data
f86f6389 JR	1	/*
	2	* Copyright (C) 2018 - Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of the GNU General Public License, version 2 only, as
	6	* published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful, but WITHOUT
	9	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	10	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	11	* more details.
	12	*
	13	* You should have received a copy of the GNU General Public License along with
	14	* this program; if not, write to the Free Software Foundation, Inc., 51
	15	* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	16	*/
	17
	18	#define _LGPL_SOURCE
	19	#include <assert.h>
	20	#include <inttypes.h>
	21
	22	#include <common/common.h>
	23	#include <common/sessiond-comm/relayd.h>
	24
	25	#include <common/compat/endian.h>
	26	#include <common/compat/string.h>
	27	#include <lttng/constant.h>
	28
	29	#include "cmd-2-11.h"
2f21a469	30	#include "utils.h"
f86f6389 JR	31
	32	int cmd_create_session_2_11(const struct lttng_buffer_view *payload,
	33	char session_name, char hostname,
	34	uint32_t live_timer, bool snapshot)
	35	{
	36	int ret;
	37	struct lttcomm_relayd_create_session_2_11 header;
	38	size_t header_len, received_names_size;
	39	struct lttng_buffer_view session_name_view;
	40	struct lttng_buffer_view hostname_view;
	41
	42	header_len = sizeof(header);
	43
	44	if (payload->size < header_len) {
	45	ERR("Unexpected payload size in \"cmd_create_session_2_11\": expected >= %zu bytes, got %zu bytes",
	46	header_len, payload->size);
	47	ret = -1;
	48	goto error;
	49	}
	50	memcpy(&header, payload->data, header_len);
	51
	52	header.session_name_len = be32toh(header.session_name_len);
	53	header.hostname_len = be32toh(header.hostname_len);
	54	header.live_timer = be32toh(header.live_timer);
	55
	56	received_names_size = header.session_name_len + header.hostname_len;
	57	if (payload->size < header_len + received_names_size) {
	58	ERR("Unexpected payload size in \"cmd_create_session_2_11\": expected >= %zu bytes, got %zu bytes",
	59	header_len + received_names_size, payload->size);
	60	ret = -1;
	61	goto error;
	62	}
	63
	64	/* Validate length against defined constant. */
	65	if (header.session_name_len > LTTNG_NAME_MAX) {
	66	ret = -ENAMETOOLONG;
	67	ERR("Length of session name (%" PRIu32 " bytes) received in create_session command exceeds maximum length (%d bytes)", header.session_name_len, LTTNG_NAME_MAX);
	68	goto error;
	69	}
	70	if (header.hostname_len > LTTNG_HOST_NAME_MAX) {
	71	ret = -ENAMETOOLONG;
	72	ERR("Length of hostname (%" PRIu32 " bytes) received in create_session command exceeds maximum length (%d bytes)", header.hostname_len, LTTNG_HOST_NAME_MAX);
	73	goto error;
	74	}
	75
	76	session_name_view = lttng_buffer_view_from_view(payload, header_len,
	77	header.session_name_len);
	78	hostname_view = lttng_buffer_view_from_view(payload,
	79	header_len + header.session_name_len, header.hostname_len);
	80
	81	/* Validate that names are NULL terminated. */
	82	if (session_name_view.data[session_name_view.size - 1] != '\0') {
	83	ERR("cmd_create_session_2_11 session_name is invalid (not NULL terminated)");
	84	ret = -1;
	85	goto error;
	86	}
	87
	88	if (hostname_view.data[hostname_view.size - 1] != '\0') {
	89	ERR("cmd_create_session_2_11 hostname is invalid (not NULL terminated)");
	90	ret = -1;
	91	goto error;
	92	}
	93
	94	/*
95	* Length and null-termination check are already performed.
96	* LTTNG_NAME_MAX and LTTNG_HOST_NAME_MAX max size are expected.
97	*/
98	strcpy(session_name, session_name_view.data);
99	strcpy(hostname, hostname_view.data);
100
101	*live_timer = header.live_timer;
102	*snapshot = !!header.snapshot;
103
104	ret = 0;
105
106	error:
107	return ret;
108	}
2f21a469 JR	109
	110	/*
	111	* cmd_recv_stream_2_11 allocates path_name and channel_name.
	112	*/
	113	int cmd_recv_stream_2_11(const struct lttng_buffer_view *payload,
	114	char ret_path_name, char ret_channel_name,
	115	uint64_t tracefile_size, uint64_t tracefile_count)
	116	{
	117	int ret;
	118	struct lttcomm_relayd_add_stream_2_11 header;
	119	size_t header_len, received_names_size;
	120	struct lttng_buffer_view channel_name_view;
	121	struct lttng_buffer_view pathname_view;
	122	char *path_name = NULL;
	123	char *channel_name = NULL;
	124
	125	header_len = sizeof(header);
	126
	127	if (payload->size < header_len) {
	128	ERR("Unexpected payload size in \"cmd_recv_stream_2_11\": expected >= %zu bytes, got %zu bytes",
	129	header_len, payload->size);
	130	ret = -1;
	131	goto error;
	132	}
	133	memcpy(&header, payload->data, header_len);
	134
	135	header.channel_name_len = be32toh(header.channel_name_len);
	136	header.pathname_len = be32toh(header.pathname_len);
	137	header.tracefile_size = be64toh(header.tracefile_size);
	138	header.tracefile_count = be64toh(header.tracefile_count);
	139
	140	received_names_size = header.channel_name_len + header.pathname_len;
	141	if (payload->size < header_len + received_names_size) {
	142	ERR("Unexpected payload size in \"cmd_recv_stream_2_11\": expected >= %zu bytes, got %zu bytes",
	143	header_len + received_names_size, payload->size);
	144	ret = -1;
	145	goto error;
	146	}
	147
	148	/* Validate length against defined constant. */
	149	if (header.channel_name_len > DEFAULT_STREAM_NAME_LEN) {
	150	ret = -ENAMETOOLONG;
	151	ERR("Channel name too long");
	152	goto error;
	153	}
	154	if (header.pathname_len > LTTNG_NAME_MAX) {
	155	ret = -ENAMETOOLONG;
	156	ERR("Pathname too long");
	157	goto error;
	158	}
	159
	160	/* Validate that names are (NULL terminated. */
	161	channel_name_view = lttng_buffer_view_from_view(payload, header_len,
	162	header.channel_name_len);
	163	pathname_view = lttng_buffer_view_from_view(payload,
	164	header_len + header.channel_name_len, header.pathname_len);
	165
	166	if (channel_name_view.data[channel_name_view.size - 1] != '\0') {
	167	ERR("cmd_recv_stream_2_11 channel_name is invalid (not NULL terminated)");
	168	ret = -1;
	169	goto error;
	170	}
	171
	172	if (pathname_view.data[pathname_view.size - 1] != '\0') {
173	ERR("cmd_recv_stream_2_11 patname is invalid (not NULL terminated)");
174	ret = -1;
175	goto error;
176	}
177
178	channel_name = strdup(channel_name_view.data);
179	if (!channel_name) {
180	ret = -errno;
181	PERROR("Channel name allocation");
182	goto error;
183	}
184
185	path_name = create_output_path(pathname_view.data);
186	if (!path_name) {
187	PERROR("Path name allocation");
188	ret = -ENOMEM;
189	goto error;
190	}
191
192	*tracefile_size = header.tracefile_size;
193	*tracefile_count = header.tracefile_count;
194	*ret_path_name = path_name;
195	*ret_channel_name = channel_name;
196	/* Move ownership to caller */
197	path_name = NULL;
198	channel_name = NULL;
199	ret = 0;
200	error:
201	free(channel_name);
202	free(path_name);
203	return ret;
204	}