socket-utils.cpp
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2014-2022, 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,
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20  * PURPOSE. See the GNU General Public License for more details.
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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::face {
37 
38 ssize_t
40 {
41  int queueLength = QUEUE_UNSUPPORTED;
42 #if defined(__linux__)
43  if (ioctl(fd, SIOCOUTQ, &queueLength) < 0) {
44  queueLength = QUEUE_ERROR;
45  }
46 #elif defined(__APPLE__)
47  socklen_t queueLengthSize = sizeof(queueLength);
48  if (getsockopt(fd, SOL_SOCKET, SO_NWRITE, &queueLength, &queueLengthSize) < 0) {
49  queueLength = QUEUE_ERROR;
50  }
51 #endif
52  return queueLength;
53 }
54 
55 } // namespace nfd::face
constexpr ssize_t QUEUE_UNSUPPORTED
Indicates that the transport does not support reading the queue capacity/length.
Definition: transport.hpp:111
constexpr ssize_t QUEUE_ERROR
Indicates that the transport was unable to retrieve the queue capacity/length.
Definition: transport.hpp:116
ssize_t getTxQueueLength(int fd)
Obtain send queue length from a specified system socket.