socket-utils.cpp
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2014-2018, Regents of the University of California,
4  * Arizona Board of Regents,
5  * Colorado State University,
6  * University Pierre & Marie Curie, Sorbonne University,
7  * Washington University in St. Louis,
8  * Beijing Institute of Technology,
9  * The University of Memphis.
10  *
11  * This file is part of NFD (Named Data Networking Forwarding Daemon).
12  * See AUTHORS.md for complete list of NFD authors and contributors.
13  *
14  * NFD is free software: you can redistribute it and/or modify it under the terms
15  * of the GNU General Public License as published by the Free Software Foundation,
16  * either version 3 of the License, or (at your option) any later version.
17  *
18  * NFD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
19  * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
20  * PURPOSE. See the GNU General Public License for more details.
21  *
22  * You should have received a copy of the GNU General Public License along with
23  * NFD, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
24  */
25 
26 #include "socket-utils.hpp"
27 #include "transport.hpp"
28 
29 #if defined(__linux__)
30 #include <linux/sockios.h>
31 #include <sys/ioctl.h>
32 #elif defined(__APPLE__)
33 #include <sys/socket.h>
34 #endif
35 
36 namespace nfd {
37 namespace face {
38 
39 ssize_t
41 {
42  int queueLength = QUEUE_UNSUPPORTED;
43 #if defined(__linux__)
44  if (ioctl(fd, SIOCOUTQ, &queueLength) < 0) {
45  queueLength = QUEUE_ERROR;
46  }
47 #elif defined(__APPLE__)
48  socklen_t queueLengthSize = sizeof(queueLength);
49  if (getsockopt(fd, SOL_SOCKET, SO_NWRITE, &queueLength, &queueLengthSize) < 0) {
50  queueLength = QUEUE_ERROR;
51  }
52 #endif
53  return queueLength;
54 }
55 
56 } // namespace face
57 } // namespace nfd
const ssize_t QUEUE_UNSUPPORTED
indicates that the transport does not support reading the queue capacity/length
Definition: transport.hpp:99
const ssize_t QUEUE_ERROR
indicates that the transport was unable to retrieve the queue capacity/length
Definition: transport.hpp:103
Copyright (c) 2014-2015, Regents of the University of California, Arizona Board of Regents...
Definition: algorithm.hpp:32
ssize_t getTxQueueLength(int fd)
obtain send queue length from a specified system socket