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

   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 <common/common.h>
  13 #include <common/sessiond-comm/relayd.h>
  14
  15 #include <common/compat/endian.h>
  16 #include <common/compat/string.h>
  17 #include <lttng/constant.h>
  18
  19 #include "cmd-2-4.h"
  20 #include "lttng-relayd.h"
  21
  22 int cmd_create_session_2_4(const struct lttng_buffer_view *payload,
  23                 char *session_name, char *hostname,
  24                 uint32_t *live_timer, bool *snapshot)
  25 {
  26         int ret;
  27         struct lttcomm_relayd_create_session_2_4 session_info;
  28         size_t len;
  29
  30         if (payload->size < sizeof(session_info)) {
  31                 ERR("Unexpected payload size in \"cmd_create_session_2_4\": expected >= %zu bytes, got %zu bytes",
  32                                 sizeof(session_info), payload->size);
  33                 ret = -1;
  34                 goto error;
  35         }
  36         memcpy(&session_info, payload->data, sizeof(session_info));
  37
  38         len = lttng_strnlen(session_info.session_name, sizeof(session_info.session_name));
  39         /* Ensure that NULL-terminated and fits in local filename length. */
  40         if (len == sizeof(session_info.session_name) || len >= LTTNG_NAME_MAX) {
  41                 ret = -ENAMETOOLONG;
  42                 ERR("Session name too long");
  43                 goto error;
  44         } else if (len == 0) {
  45                 ret = -EINVAL;
  46                 ERR("Session name can't be of length 0");
  47                 goto error;
  48         }
  49         strncpy(session_name, session_info.session_name, LTTNG_NAME_MAX);
  50
  51         len = lttng_strnlen(session_info.hostname, sizeof(session_info.hostname));
  52         if (len == sizeof(session_info.hostname) || len >= LTTNG_HOST_NAME_MAX) {
  53                 ret = -ENAMETOOLONG;
  54                 ERR("Session name too long");
  55                 goto error;
  56         }
  57         strncpy(hostname, session_info.hostname, LTTNG_HOST_NAME_MAX);
  58
  59         *live_timer = be32toh(session_info.live_timer);
  60         *snapshot = be32toh(session_info.snapshot);
  61
  62         ret = 0;
  63
  64 error:
  65         return ret;
  66 }