aboutsummaryrefslogtreecommitdiff
path: root/slirp/src/util.c
blob: 5ec2fa87ab6c566ce74e7a4f511cc929614ce2ff (plain)
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
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
/*
 * util.c (mostly based on QEMU os-win32.c)
 *
 * Copyright (c) 2003-2008 Fabrice Bellard
 * Copyright (c) 2010-2016 Red Hat, Inc.
 *
 * QEMU library functions for win32 which are shared between QEMU and
 * the QEMU tools.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include "util.h"

#include <glib.h>
#include <fcntl.h>
#include <stdint.h>

#if defined(_WIN32)
int slirp_inet_aton(const char *cp, struct in_addr *ia)
{
    uint32_t addr = inet_addr(cp);
    if (addr == 0xffffffff) {
        return 0;
    }
    ia->s_addr = addr;
    return 1;
}
#endif

void slirp_set_nonblock(int fd)
{
#ifndef _WIN32
    int f;
    f = fcntl(fd, F_GETFL);
    assert(f != -1);
    f = fcntl(fd, F_SETFL, f | O_NONBLOCK);
    assert(f != -1);
#else
    unsigned long opt = 1;
    ioctlsocket(fd, FIONBIO, &opt);
#endif
}

static void slirp_set_cloexec(int fd)
{
#ifndef _WIN32
    int f;
    f = fcntl(fd, F_GETFD);
    assert(f != -1);
    f = fcntl(fd, F_SETFD, f | FD_CLOEXEC);
    assert(f != -1);
#endif
}

/*
 * Opens a socket with FD_CLOEXEC set
 */
int slirp_socket(int domain, int type, int protocol)
{
    int ret;

#ifdef SOCK_CLOEXEC
    ret = socket(domain, type | SOCK_CLOEXEC, protocol);
    if (ret != -1 || errno != EINVAL) {
        return ret;
    }
#endif
    ret = socket(domain, type, protocol);
    if (ret >= 0) {
        slirp_set_cloexec(ret);
    }

    return ret;
}

#ifdef _WIN32
static int socket_error(void)
{
    switch (WSAGetLastError()) {
    case 0:
        return 0;
    case WSAEINTR:
        return EINTR;
    case WSAEINVAL:
        return EINVAL;
    case WSA_INVALID_HANDLE:
        return EBADF;
    case WSA_NOT_ENOUGH_MEMORY:
        return ENOMEM;
    case WSA_INVALID_PARAMETER:
        return EINVAL;
    case WSAENAMETOOLONG:
        return ENAMETOOLONG;
    case WSAENOTEMPTY:
        return ENOTEMPTY;
    case WSAEWOULDBLOCK:
         /* not using EWOULDBLOCK as we don't want code to have
          * to check both EWOULDBLOCK and EAGAIN */
        return EAGAIN;
    case WSAEINPROGRESS:
        return EINPROGRESS;
    case WSAEALREADY:
        return EALREADY;
    case WSAENOTSOCK:
        return ENOTSOCK;
    case WSAEDESTADDRREQ:
        return EDESTADDRREQ;
    case WSAEMSGSIZE:
        return EMSGSIZE;
    case WSAEPROTOTYPE:
        return EPROTOTYPE;
    case WSAENOPROTOOPT:
        return ENOPROTOOPT;
    case WSAEPROTONOSUPPORT:
        return EPROTONOSUPPORT;
    case WSAEOPNOTSUPP:
        return EOPNOTSUPP;
    case WSAEAFNOSUPPORT:
        return EAFNOSUPPORT;
    case WSAEADDRINUSE:
        return EADDRINUSE;
    case WSAEADDRNOTAVAIL:
        return EADDRNOTAVAIL;
    case WSAENETDOWN:
        return ENETDOWN;
    case WSAENETUNREACH:
        return ENETUNREACH;
    case WSAENETRESET:
        return ENETRESET;
    case WSAECONNABORTED:
        return ECONNABORTED;
    case WSAECONNRESET:
        return ECONNRESET;
    case WSAENOBUFS:
        return ENOBUFS;
    case WSAEISCONN:
        return EISCONN;
    case WSAENOTCONN:
        return ENOTCONN;
    case WSAETIMEDOUT:
        return ETIMEDOUT;
    case WSAECONNREFUSED:
        return ECONNREFUSED;
    case WSAELOOP:
        return ELOOP;
    case WSAEHOSTUNREACH:
        return EHOSTUNREACH;
    default:
        return EIO;
    }
}

#undef ioctlsocket
int slirp_ioctlsocket_wrap(int fd, int req, void *val)
{
    int ret;
    ret = ioctlsocket(fd, req, val);
    if (ret < 0) {
        errno = socket_error();
    }
    return ret;
}

#undef closesocket
int slirp_closesocket_wrap(int fd)
{
    int ret;
    ret = closesocket(fd);
    if (ret < 0) {
        errno = socket_error();
    }
    return ret;
}

#undef connect
int slirp_connect_wrap(int sockfd, const struct sockaddr *addr, int addrlen)
{
    int ret;
    ret = connect(sockfd, addr, addrlen);
    if (ret < 0) {
        errno = socket_error();
    }
    return ret;
}

#undef listen
int slirp_listen_wrap(int sockfd, int backlog)
{
    int ret;
    ret = listen(sockfd, backlog);
    if (ret < 0) {
        errno = socket_error();
    }
    return ret;
}

#undef bind
int slirp_bind_wrap(int sockfd, const struct sockaddr *addr, int addrlen)
{
    int ret;
    ret = bind(sockfd, addr, addrlen);
    if (ret < 0) {
        errno = socket_error();
    }
    return ret;
}

#undef socket
int slirp_socket_wrap(int domain, int type, int protocol)
{
    int ret;
    ret = socket(domain, type, protocol);
    if (ret < 0) {
        errno = socket_error();
    }
    return ret;
}

#undef accept
int slirp_accept_wrap(int sockfd, struct sockaddr *addr, int *addrlen)
{
    int ret;
    ret = accept(sockfd, addr, addrlen);
    if (ret < 0) {
        errno = socket_error();
    }
    return ret;
}

#undef shutdown
int slirp_shutdown_wrap(int sockfd, int how)
{
    int ret;
    ret = shutdown(sockfd, how);
    if (ret < 0) {
        errno = socket_error();
    }
    return ret;
}

#undef getsockopt
int slirp_getsockopt_wrap(int sockfd, int level, int optname,
                          void *optval, int *optlen)
{
    int ret;
    ret = getsockopt(sockfd, level, optname, optval, optlen);
    if (ret < 0) {
        errno = socket_error();
    }
    return ret;
}

#undef setsockopt
int slirp_setsockopt_wrap(int sockfd, int level, int optname,
                          const void *optval, int optlen)
{
    int ret;
    ret = setsockopt(sockfd, level, optname, optval, optlen);
    if (ret < 0) {
        errno = socket_error();
    }
    return ret;
}

#undef getpeername
int slirp_getpeername_wrap(int sockfd, struct sockaddr *addr,
                           int *addrlen)
{
    int ret;
    ret = getpeername(sockfd, addr, addrlen);
    if (ret < 0) {
        errno = socket_error();
    }
    return ret;
}

#undef getsockname
int slirp_getsockname_wrap(int sockfd, struct sockaddr *addr,
                           int *addrlen)
{
    int ret;
    ret = getsockname(sockfd, addr, addrlen);
    if (ret < 0) {
        errno = socket_error();
    }
    return ret;
}

#undef send
ssize_t slirp_send_wrap(int sockfd, const void *buf, size_t len, int flags)
{
    int ret;
    ret = send(sockfd, buf, len, flags);
    if (ret < 0) {
        errno = socket_error();
    }
    return ret;
}

#undef sendto
ssize_t slirp_sendto_wrap(int sockfd, const void *buf, size_t len, int flags,
                     const struct sockaddr *addr, int addrlen)
{
    int ret;
    ret = sendto(sockfd, buf, len, flags, addr, addrlen);
    if (ret < 0) {
        errno = socket_error();
    }
    return ret;
}

#undef recv
ssize_t slirp_recv_wrap(int sockfd, void *buf, size_t len, int flags)
{
    int ret;
    ret = recv(sockfd, buf, len, flags);
    if (ret < 0) {
        errno = socket_error();
    }
    return ret;
}

#undef recvfrom
ssize_t slirp_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
                            struct sockaddr *addr, int *addrlen)
{
    int ret;
    ret = recvfrom(sockfd, buf, len, flags, addr, addrlen);
    if (ret < 0) {
        errno = socket_error();
    }
    return ret;
}
#endif /* WIN32 */

void slirp_pstrcpy(char *buf, int buf_size, const char *str)
{
    int c;
    char *q = buf;

    if (buf_size <= 0)
        return;

    for(;;) {
        c = *str++;
        if (c == 0 || q >= buf + buf_size - 1)
            break;
        *q++ = c;
    }
    *q = '\0';
}