1 /* MSPDebug - debugging tool for MSP430 MCUs
2 * Copyright (C) 2009, 2010 Daniel Beer
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #ifndef __Windows__
20 #include <sys/select.h>
21 #endif
22
23 #include <errno.h>
24 #include <stdlib.h>
25 #include <string.h>
26
27 #include "sockets.h"
28 #include "util.h"
29 #include "ctrlc.h"
30
31 #ifdef __Windows__
32 #include <windows.h>
33 #include <winerror.h>
34 #endif
35
36 #ifdef __Windows__
37 static DWORD error_save = 0;
38
sockets_begin(SOCKET s,DWORD event)39 static void sockets_begin(SOCKET s, DWORD event)
40 {
41 u_long mode = 1;
42
43 ioctlsocket(s, FIONBIO, &mode);
44 WSAEventSelect(s, ctrlc_win32_event(), event);
45
46 /* We explicitly check for Ctrl+C after resetting the event in
47 * sockets_wait().
48 */
49 ResetEvent(ctrlc_win32_event());
50 }
51
sockets_wait(DWORD timeout)52 static int sockets_wait(DWORD timeout)
53 {
54 DWORD r;
55
56 error_save = WSAGetLastError();
57 if (ctrlc_check())
58 error_save = ERROR_OPERATION_ABORTED;
59 if (error_save != WSAEWOULDBLOCK)
60 return -1;
61
62 r = WaitForSingleObject(ctrlc_win32_event(), timeout);
63
64 if (r == WAIT_TIMEOUT) {
65 error_save = WAIT_TIMEOUT;
66 return -1;
67 }
68
69 return 0;
70 }
71
sockets_end(SOCKET s)72 static void sockets_end(SOCKET s)
73 {
74 u_long mode = 0;
75
76 ioctlsocket(s, FIONBIO, &mode);
77 WSAEventSelect(s, ctrlc_win32_event(), 0);
78 WSASetLastError(error_save);
79 }
80
sockets_accept(SOCKET s,struct sockaddr * addr,socklen_t * addrlen)81 SOCKET sockets_accept(SOCKET s, struct sockaddr *addr, socklen_t *addrlen)
82 {
83 SOCKET client = INVALID_SOCKET;
84
85 sockets_begin(s, FD_ACCEPT);
86
87 do {
88 client = WSAAccept(s, addr, addrlen, NULL, 0);
89 } while (SOCKET_ISERR(client) && !sockets_wait(INFINITE));
90
91 sockets_end(s);
92 return client;
93 }
94
sockets_connect(SOCKET s,const struct sockaddr * addr,socklen_t addrlen)95 int sockets_connect(SOCKET s, const struct sockaddr *addr, socklen_t addrlen)
96 {
97 int ret = -1;
98
99 sockets_begin(s, FD_CONNECT);
100
101 connect(s, addr, addrlen);
102 do {
103 WSANETWORKEVENTS evts;
104
105 WSAEnumNetworkEvents(s, NULL, &evts);
106 if (evts.lNetworkEvents & FD_CONNECT) {
107 error_save = evts.iErrorCode[FD_CONNECT_BIT];
108 if (!error_save)
109 ret = 0;
110 break;
111 }
112 } while (!sockets_wait(INFINITE));
113
114 sockets_end(s);
115 return ret;
116 }
117
sockets_send(SOCKET s,const void * buf,size_t len,int flags)118 ssize_t sockets_send(SOCKET s, const void *buf, size_t len, int flags)
119 {
120 int ret = -1;
121
122 sockets_begin(s, FD_WRITE | FD_CLOSE);
123
124 do {
125 ret = send(s, buf, len, flags);
126 } while (ret < 0 && !sockets_wait(INFINITE));
127
128 sockets_end(s);
129 return ret;
130 }
131
sockets_recv(SOCKET s,void * buf,size_t len,int flags,int timeout_ms,int * was_timeout)132 ssize_t sockets_recv(SOCKET s, void *buf, size_t len, int flags,
133 int timeout_ms, int *was_timeout)
134 {
135 int ret = -1;
136 DWORD to_arg = (timeout_ms >= 0) ? timeout_ms : INFINITE;
137
138 sockets_begin(s, FD_READ | FD_CLOSE);
139
140 do {
141 ret = recv(s, buf, len, flags);
142 } while (ret < 0 && !sockets_wait(to_arg));
143
144 if (was_timeout)
145 *was_timeout = (ret < 0 && (error_save == WAIT_TIMEOUT));
146
147 sockets_end(s);
148 return ret;
149 }
150 #else /* __Windows__ */
sockets_accept(SOCKET s,struct sockaddr * addr,socklen_t * addrlen)151 SOCKET sockets_accept(SOCKET s, struct sockaddr *addr, socklen_t *addrlen)
152 {
153 return accept(s, addr, addrlen);
154 }
155
sockets_connect(SOCKET s,const struct sockaddr * addr,socklen_t addrlen)156 int sockets_connect(SOCKET s, const struct sockaddr *addr, socklen_t addrlen)
157 {
158 return connect(s, addr, addrlen);
159 }
160
sockets_send(SOCKET s,const void * buf,size_t len,int flags)161 ssize_t sockets_send(SOCKET s, const void *buf, size_t len, int flags)
162 {
163 return send(s, buf, len, flags);
164 }
165
sockets_recv(SOCKET s,void * buf,size_t buf_len,int flags,int timeout_ms,int * was_timeout)166 ssize_t sockets_recv(SOCKET s, void *buf, size_t buf_len, int flags,
167 int timeout_ms, int *was_timeout)
168 {
169 fd_set r;
170 struct timeval to = {
171 .tv_sec = timeout_ms / 1000,
172 .tv_usec = timeout_ms % 1000
173 };
174
175 FD_ZERO(&r);
176 FD_SET(s, &r);
177
178 if (select(s + 1, &r, NULL, NULL,
179 timeout_ms < 0 ? NULL : &to) < 0)
180 return -1;
181
182 if (was_timeout)
183 *was_timeout = !FD_ISSET(s, &r);
184
185 if (!FD_ISSET(s, &r)) {
186 errno = ETIMEDOUT;
187 return 0;
188 }
189
190 return recv(s, buf, buf_len, flags);
191 }
192 #endif
193