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

   1 /*
   2  * Copyright (C) 2013 Julien Desfossez <jdesfossez@efficios.com>
   3  * Copyright (C) 2013 David Goulet <dgoulet@efficios.com>
   4  * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   5  *
   6  * SPDX-License-Identifier: GPL-2.0-only
   7  *
   8  */
   9
  10 #define _LGPL_SOURCE
  11
  12 #include "cmd-2-4.hpp"
  13 #include "lttng-relayd.hpp"
  14
  15 #include <common/common.hpp>
  16 #include <common/compat/endian.hpp>
  17 #include <common/compat/string.hpp>
  18 #include <common/sessiond-comm/relayd.hpp>
  19
  20 #include <lttng/constant.h>
  21
  22 int cmd_create_session_2_4(const struct lttng_buffer_view *payload,
  23                            char *session_name,
  24                            char *hostname,
  25                            uint32_t *live_timer,
  26                            bool *snapshot)
  27 {
  28         int ret;
  29         struct lttcomm_relayd_create_session_2_4 session_info;
  30         size_t len;
  31
  32         if (payload->size < sizeof(session_info)) {
  33                 ERR("Unexpected payload size in \"cmd_create_session_2_4\": expected >= %zu bytes, got %zu bytes",
  34                     sizeof(session_info),
  35                     payload->size);
  36                 ret = -1;
  37                 goto error;
  38         }
  39         memcpy(&session_info, payload->data, sizeof(session_info));
  40
  41         len = lttng_strnlen(session_info.session_name, sizeof(session_info.session_name));
  42         /* Ensure that NULL-terminated and fits in local filename length. */
  43         if (len == sizeof(session_info.session_name) || len >= LTTNG_NAME_MAX) {
  44                 ret = -ENAMETOOLONG;
  45                 ERR("Session name too long");
  46                 goto error;
  47         } else if (len == 0) {
  48                 ret = -EINVAL;
  49                 ERR("Session name can't be of length 0");
  50                 goto error;
  51         }
  52         strncpy(session_name, session_info.session_name, LTTNG_NAME_MAX);
  53
  54         len = lttng_strnlen(session_info.hostname, sizeof(session_info.hostname));
  55         if (len == sizeof(session_info.hostname) || len >= LTTNG_HOST_NAME_MAX) {
  56                 ret = -ENAMETOOLONG;
  57                 ERR("Session name too long");
  58                 goto error;
  59         }
  60         strncpy(hostname, session_info.hostname, LTTNG_HOST_NAME_MAX);
  61
  62         *live_timer = be32toh(session_info.live_timer);
  63         *snapshot = be32toh(session_info.snapshot);
  64
  65         ret = 0;
  66
  67 error:
  68         return ret;
  69 }