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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/*
* Public domain
*
* pipe2/pipe/socketpair emulation
* Brent Cook <bcook@openbsd.org>
*/
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/socket.h>
#undef socketpair
#ifdef _WIN32
static int setfd(int fd, int flag)
{
int rc = -1;
if (flag & FD_CLOEXEC) {
HANDLE h = (HANDLE)_get_osfhandle(fd);
if (h != NULL)
rc = SetHandleInformation(h, HANDLE_FLAG_INHERIT, 0) == 0 ? -1 : 0;
}
return rc;
}
static int setfl(int fd, int flag)
{
int rc = -1;
if (flag & O_NONBLOCK) {
long mode = 1;
rc = ioctlsocket(fd, FIONBIO, &mode);
}
return rc;
}
int socketpair(int domain, int type, int protocol, int socket_vector[2])
{
if (domain != AF_UNIX || !(type & SOCK_STREAM) || protocol != PF_UNSPEC)
return -1;
socket_vector[0] = -1;
socket_vector[1] = -1;
int listener = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (listener == -1) {
return -1;
}
struct sockaddr_in addr = {
.sin_family = AF_INET,
.sin_addr.s_addr = htonl(INADDR_LOOPBACK),
.sin_port = 0,
};
int yes = 1, e;
if (setsockopt(listener, SOL_SOCKET, SO_REUSEADDR,
(void *)&yes, sizeof yes) == -1)
goto err;
if (bind(listener, (struct sockaddr *)&addr, sizeof addr) != 0)
goto err;
memset(&addr, 0, sizeof addr);
socklen_t addrlen = sizeof addr;
if (getsockname(listener, (struct sockaddr *)&addr, &addrlen) != 0)
goto err;
addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
addr.sin_family = AF_INET;
if (listen(listener, 1) != 0)
goto err;
socket_vector[0] = WSASocket(AF_INET, SOCK_STREAM, 0, NULL, 0, 0);
if (socket_vector[0] == -1)
goto err;
if (connect(socket_vector[0], (struct sockaddr *)&addr, sizeof addr) != 0)
goto err;
socket_vector[1] = accept(listener, NULL, NULL);
if (socket_vector[1] == -1)
goto err;
closesocket(listener);
return 0;
err:
e = WSAGetLastError();
closesocket(listener);
closesocket(socket_vector[0]);
closesocket(socket_vector[1]);
WSASetLastError(e);
socket_vector[0] = -1;
socket_vector[1] = -1;
return -1;
}
int pipe(int fildes[2])
{
return socketpair(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK, PF_UNSPEC, fildes);
}
#else
static int setfd(int fd, int flag)
{
int flags = fcntl(fd, F_GETFD);
flags |= flag;
return fcntl(fd, F_SETFD, flags);
}
static int setfl(int fd, int flag)
{
int flags = fcntl(fd, F_GETFL);
flags |= flag;
return fcntl(fd, F_SETFL, flags);
}
#endif
int pipe2(int fildes[2], int flags)
{
int rc = pipe(fildes);
if (rc == 0) {
if (flags & O_NONBLOCK) {
rc |= setfl(fildes[0], O_NONBLOCK);
rc |= setfl(fildes[1], O_NONBLOCK);
}
if (flags & O_CLOEXEC) {
rc |= setfd(fildes[0], FD_CLOEXEC);
rc |= setfd(fildes[1], FD_CLOEXEC);
}
if (rc != 0) {
int e = errno;
close(fildes[0]);
close(fildes[1]);
errno = e;
}
}
return rc;
}
int bsd_socketpair(int domain, int type, int protocol, int socket_vector[2])
{
int flags = type & ~0xf;
type &= 0xf;
int rc = socketpair(domain, type, protocol, socket_vector);
if (rc == 0) {
if (flags & SOCK_NONBLOCK) {
rc |= setfl(socket_vector[0], O_NONBLOCK);
rc |= setfl(socket_vector[1], O_NONBLOCK);
}
if (flags & SOCK_CLOEXEC) {
rc |= setfd(socket_vector[0], FD_CLOEXEC);
rc |= setfd(socket_vector[1], FD_CLOEXEC);
}
if (rc != 0) {
int e = errno;
close(socket_vector[0]);
close(socket_vector[1]);
errno = e;
}
}
return rc;
}
|
