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