src/bin/lttng-relayd/cmd-2-4.c

   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
  26 #include <common/compat/endian.h>
  27 #include <common/compat/string.h>
  28 #include <lttng/constant.h>
  29
  30 #include "cmd-generic.h"
  31 #include "lttng-relayd.h"
  32
  33 int cmd_create_session_2_4(struct relay_connection *conn,
  34                 char *session_name, char *hostname,
  35                 uint32_t *live_timer, bool *snapshot)
  36 {
  37         int ret;
  38         struct lttcomm_relayd_create_session_2_4 session_info;
  39         size_t len;
  40
  41         ret = cmd_recv(conn->sock, &session_info, sizeof(session_info));
  42         if (ret < 0) {
  43                 ERR("Unable to recv session info version 2.4");
  44                 goto error;
  45         }
  46         len = lttng_strnlen(session_info.session_name, sizeof(session_info.session_name));
  47         /* Ensure that NULL-terminated and fits in local filename length. */
  48         if (len == sizeof(session_info.session_name) || len >= LTTNG_NAME_MAX) {
  49                 ret = -ENAMETOOLONG;
  50                 ERR("Session name too long");
  51                 goto error;
  52         }
  53         strncpy(session_name, session_info.session_name,
  54                         sizeof(session_info.session_name));
  55
  56         len = lttng_strnlen(session_info.hostname, sizeof(session_info.hostname));
  57         if (len == sizeof(session_info.hostname) || len >= LTTNG_HOST_NAME_MAX) {
  58                 ret = -ENAMETOOLONG;
  59                 ERR("Session name too long");
  60                 goto error;
  61         }
  62         strncpy(hostname, session_info.hostname,
  63                         sizeof(session_info.hostname));
  64         *live_timer = be32toh(session_info.live_timer);
  65         *snapshot = be32toh(session_info.snapshot);
  66
  67         ret = 0;
  68
  69 error:
  70         return ret;
  71 }