Fix: unprivilieged sessiond agent port clashes with root sessiond
[lttng-tools.git] / src / bin / lttng-relayd / cmd-2-2.c
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1/*
2 * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
3 * David Goulet <dgoulet@efficios.com>
7591bab1 4 * 2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License, version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc., 51
17 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
6c1c0768 20#define _LGPL_SOURCE
0f907de1 21#include <assert.h>
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22
23#include <common/common.h>
24#include <common/sessiond-comm/relayd.h>
25
f263b7fd 26#include <common/compat/endian.h>
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27#include <common/compat/string.h>
28#include <lttng/constant.h>
f263b7fd 29
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30#include "cmd-generic.h"
31#include "cmd-2-1.h"
32#include "utils.h"
33
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34/*
35 * cmd_recv_stream_2_2 allocates path_name and channel_name.
36 */
58eb9381 37int cmd_recv_stream_2_2(struct relay_connection *conn,
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38 char **ret_path_name, char **ret_channel_name,
39 uint64_t *tracefile_size, uint64_t *tracefile_count)
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40{
41 int ret;
42 struct lttcomm_relayd_add_stream_2_2 stream_info;
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43 char *path_name = NULL;
44 char *channel_name = NULL;
246777db 45 size_t len;
0f907de1 46
58eb9381 47 ret = cmd_recv(conn->sock, &stream_info, sizeof(stream_info));
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48 if (ret < 0) {
49 ERR("Unable to recv stream version 2.2");
50 goto error;
51 }
52
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53 len = lttng_strnlen(stream_info.pathname, sizeof(stream_info.pathname));
54 /* Ensure that NULL-terminated and fits in local filename length. */
55 if (len == sizeof(stream_info.pathname) || len >= LTTNG_NAME_MAX) {
56 ret = -ENAMETOOLONG;
57 ERR("Path name too long");
58 goto error;
59 }
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60 path_name = create_output_path(stream_info.pathname);
61 if (!path_name) {
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62 PERROR("Path name allocation");
63 ret = -ENOMEM;
64 goto error;
65 }
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66 len = lttng_strnlen(stream_info.channel_name, sizeof(stream_info.channel_name));
67 if (len == sizeof(stream_info.channel_name) || len >= DEFAULT_STREAM_NAME_LEN) {
68 ret = -ENAMETOOLONG;
69 ERR("Channel name too long");
70 goto error;
71 }
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72 channel_name = strdup(stream_info.channel_name);
73 if (!channel_name) {
0f907de1 74 ret = -errno;
246777db 75 PERROR("Channel name allocation");
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76 goto error;
77 }
78
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79 *tracefile_size = be64toh(stream_info.tracefile_size);
80 *tracefile_count = be64toh(stream_info.tracefile_count);
81 *ret_path_name = path_name;
82 *ret_channel_name = channel_name;
83 return 0;
0f907de1 84error:
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85 free(path_name);
86 free(channel_name);
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87 return ret;
88}
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