1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
/*
* Copyright (C) 2015 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <cutils/sockets.h>
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms741549(v=vs.85).aspx
// claims WSACleanup() should be called before program exit, but general
// consensus seems to be that it hasn't actually been necessary for a long time,
// likely since Windows 3.1. Additionally, trying to properly use WSACleanup()
// can be extremely tricky and cause deadlock when using threads or atexit().
//
// Both adb (1) and Chrome (2) purposefully avoid WSACleanup() with no issues.
// (1) https://android.googlesource.com/platform/system/core.git/+/master/adb/sysdeps_win32.cpp
// (2) https://code.google.com/p/chromium/codesearch#chromium/src/net/base/winsock_init.cc
extern "C" bool initialize_windows_sockets() {
// There's no harm in calling WSAStartup() multiple times but no benefit
// either, we may as well skip it after the first.
static bool init_success = false;
if (!init_success) {
WSADATA wsaData;
init_success = (WSAStartup(MAKEWORD(2, 2), &wsaData) == 0);
}
return init_success;
}
int socket_close(cutils_socket_t sock) {
return closesocket(sock);
}
int socket_set_receive_timeout(cutils_socket_t sock, int timeout_ms) {
return setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO,
reinterpret_cast<char*>(&timeout_ms), sizeof(timeout_ms));
}
ssize_t socket_send_buffers(cutils_socket_t sock,
const cutils_socket_buffer_t* buffers,
size_t num_buffers) {
if (num_buffers > SOCKET_SEND_BUFFERS_MAX_BUFFERS) {
return -1;
}
WSABUF wsa_buffers[SOCKET_SEND_BUFFERS_MAX_BUFFERS];
for (size_t i = 0; i < num_buffers; ++i) {
// It's safe to cast away const here; WSABUF declares non-const
// void* because it's used for both send and receive, but since
// we're only sending, the data won't be modified.
wsa_buffers[i].buf =
reinterpret_cast<char*>(const_cast<void*>(buffers[i].data));
wsa_buffers[i].len = buffers[i].length;
}
DWORD bytes_sent = 0;
if (WSASend(sock, wsa_buffers, num_buffers, &bytes_sent, 0, nullptr,
nullptr) != SOCKET_ERROR) {
return bytes_sent;
}
return -1;
}
|
