-
-
Notifications
You must be signed in to change notification settings - Fork 519
/
connect-nt.c
162 lines (147 loc) · 6.19 KB
/
connect-nt.c
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
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/assert.h"
#include "libc/atomic.h"
#include "libc/calls/struct/fd.internal.h"
#include "libc/calls/struct/sigset.internal.h"
#include "libc/cosmo.h"
#include "libc/errno.h"
#include "libc/mem/mem.h"
#include "libc/nt/enum/wsaid.h"
#include "libc/nt/errors.h"
#include "libc/nt/struct/guid.h"
#include "libc/nt/struct/overlapped.h"
#include "libc/nt/thread.h"
#include "libc/nt/thunk/msabi.h"
#include "libc/nt/winsock.h"
#include "libc/sock/internal.h"
#include "libc/sock/struct/sockaddr.h"
#include "libc/sock/syscall_fd.internal.h"
#include "libc/sock/wsaid.internal.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/consts/sol.h"
#include "libc/sysv/errfuns.h"
#ifdef __x86_64__
#include "libc/sock/yoink.inc"
__msabi extern typeof(__sys_setsockopt_nt) *const __imp_setsockopt;
struct ConnectArgs {
const void *addr;
uint32_t addrsize;
};
static struct {
atomic_uint once;
bool32 (*__msabi lpConnectEx)(int64_t hSocket, const struct sockaddr *name,
int namelen, const void *opt_lpSendBuffer,
uint32_t dwSendDataLength,
uint32_t *opt_out_lpdwBytesSent,
struct NtOverlapped *lpOverlapped);
} g_connectex;
static void connectex_init(void) {
static struct NtGuid ConnectExGuid = WSAID_CONNECTEX;
g_connectex.lpConnectEx = __get_wsaid(&ConnectExGuid);
}
void sys_connect_nt_cleanup(struct Fd *f, bool cancel) {
struct NtOverlapped *overlap;
if ((overlap = f->connect_op)) {
uint32_t got, flags;
if (cancel)
CancelIoEx(f->handle, overlap);
if (WSAGetOverlappedResult(f->handle, overlap, &got, cancel, &flags) ||
WSAGetLastError() != kNtErrorIoIncomplete) {
WSACloseEvent(overlap->hEvent);
free(overlap);
f->connect_op = 0;
}
}
}
static int sys_connect_nt_start(int64_t hSocket,
struct NtOverlapped *lpOverlapped,
uint32_t *flags, void *arg) {
struct ConnectArgs *args = arg;
if (g_connectex.lpConnectEx(hSocket, args->addr, args->addrsize, 0, 0, 0,
lpOverlapped)) {
return 0;
} else {
return -1;
}
}
static textwindows int sys_connect_nt_impl(struct Fd *f, const void *addr,
uint32_t addrsize, sigset_t mask) {
// get connect function from winsock api
cosmo_once(&g_connectex.once, connectex_init);
// fail if previous connect() is still in progress
if (f->connect_op)
return ealready();
// ConnectEx() requires bind() be called beforehand
if (!f->isbound) {
struct sockaddr_storage ss = {0};
ss.ss_family = ((struct sockaddr *)addr)->sa_family;
if (sys_bind_nt(f, &ss, sizeof(ss)) == -1)
return -1;
}
// perform normal connect
if (!(f->flags & O_NONBLOCK)) {
ssize_t rc = __winsock_block(f->handle, 0, false, f->sndtimeo, mask,
sys_connect_nt_start,
&(struct ConnectArgs){addr, addrsize});
if (rc == -1 && errno == EAGAIN) {
// return ETIMEDOUT if SO_SNDTIMEO elapsed
// note that Linux will return EINPROGRESS
errno = etimedout();
} else if (!rc) {
__imp_setsockopt(f->handle, SOL_SOCKET, kNtSoUpdateConnectContext, 0, 0);
}
return rc;
}
// perform nonblocking connect(), i.e.
// 1. connect(O_NONBLOCK) → EINPROGRESS
// 2. poll(POLLOUT)
bool32 ok;
struct NtOverlapped *overlap = calloc(1, sizeof(struct NtOverlapped));
if (!overlap)
return -1;
overlap->hEvent = WSACreateEvent();
ok = g_connectex.lpConnectEx(f->handle, addr, addrsize, 0, 0, 0, overlap);
if (ok) {
uint32_t dwBytes, dwFlags;
ok = WSAGetOverlappedResult(f->handle, overlap, &dwBytes, false, &dwFlags);
WSACloseEvent(overlap->hEvent);
free(overlap);
if (!ok) {
return __winsockerr();
}
__imp_setsockopt(f->handle, SOL_SOCKET, kNtSoUpdateConnectContext, 0, 0);
return 0;
} else if (WSAGetLastError() == kNtErrorIoPending) {
f->connect_op = overlap;
return einprogress();
} else {
WSACloseEvent(overlap->hEvent);
free(overlap);
return __winsockerr();
}
}
textwindows int sys_connect_nt(struct Fd *f, const void *addr,
uint32_t addrsize) {
sigset_t mask = __sig_block();
int rc = sys_connect_nt_impl(f, addr, addrsize, mask);
__sig_unblock(mask);
return rc;
}
#endif /* __x86_64__ */