| 1 | /* |
| 2 | * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com> |
| 3 | * David Goulet <dgoulet@efficios.com> |
| 4 | * 2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 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 | |
| 20 | #define _LGPL_SOURCE |
| 21 | #include <assert.h> |
| 22 | |
| 23 | #include <common/common.h> |
| 24 | #include <common/sessiond-comm/relayd.h> |
| 25 | #include <common/compat/string.h> |
| 26 | #include <lttng/constant.h> |
| 27 | |
| 28 | #include "cmd-generic.h" |
| 29 | #include "cmd-2-1.h" |
| 30 | #include "utils.h" |
| 31 | |
| 32 | /* |
| 33 | * cmd_recv_stream_2_1 allocates path_name and channel_name. |
| 34 | */ |
| 35 | int cmd_recv_stream_2_1(struct relay_connection *conn, |
| 36 | char **ret_path_name, char **ret_channel_name) |
| 37 | { |
| 38 | int ret; |
| 39 | struct lttcomm_relayd_add_stream stream_info; |
| 40 | char *path_name = NULL; |
| 41 | char *channel_name = NULL; |
| 42 | size_t len; |
| 43 | |
| 44 | ret = cmd_recv(conn->sock, &stream_info, sizeof(stream_info)); |
| 45 | if (ret < 0) { |
| 46 | ERR("Unable to recv stream version 2.1"); |
| 47 | goto error; |
| 48 | } |
| 49 | |
| 50 | len = lttng_strnlen(stream_info.pathname, sizeof(stream_info.pathname)); |
| 51 | /* Ensure that NULL-terminated and fits in local filename length. */ |
| 52 | if (len == sizeof(stream_info.pathname) || len >= LTTNG_NAME_MAX) { |
| 53 | ret = -ENAMETOOLONG; |
| 54 | ERR("Path name too long"); |
| 55 | goto error; |
| 56 | } |
| 57 | path_name = create_output_path(stream_info.pathname); |
| 58 | if (!path_name) { |
| 59 | PERROR("Path name allocation"); |
| 60 | ret = -ENOMEM; |
| 61 | goto error; |
| 62 | } |
| 63 | len = lttng_strnlen(stream_info.channel_name, sizeof(stream_info.channel_name)); |
| 64 | if (len == sizeof(stream_info.channel_name) || len >= DEFAULT_STREAM_NAME_LEN) { |
| 65 | ret = -ENAMETOOLONG; |
| 66 | ERR("Channel name too long"); |
| 67 | goto error; |
| 68 | } |
| 69 | channel_name = strdup(stream_info.channel_name); |
| 70 | if (!channel_name) { |
| 71 | ret = -errno; |
| 72 | PERROR("Channel name allocation"); |
| 73 | goto error; |
| 74 | } |
| 75 | |
| 76 | *ret_path_name = path_name; |
| 77 | *ret_channel_name = channel_name; |
| 78 | return 0; |
| 79 | error: |
| 80 | free(path_name); |
| 81 | free(channel_name); |
| 82 | return ret; |
| 83 | } |