summaryrefslogtreecommitdiffstats
path: root/rubbos/app/httpd-2.0.64/srclib/apr/network_io/unix/sockopt.c
blob: 039fda085afcc25a54d1395ac53764255fb68bd9 (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
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
/* Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "apr_arch_networkio.h"
#include "apr_strings.h"


static apr_status_t soblock(int sd)
{
/* BeOS uses setsockopt at present for non blocking... */
#ifndef BEOS
    int fd_flags;

    fd_flags = fcntl(sd, F_GETFL, 0);
#if defined(O_NONBLOCK)
    fd_flags &= ~O_NONBLOCK;
#elif defined(O_NDELAY)
    fd_flags &= ~O_NDELAY;
#elif defined(FNDELAY)
    fd_flags &= ~FNDELAY;
#else
#error Please teach APR how to make sockets blocking on your platform.
#endif
    if (fcntl(sd, F_SETFL, fd_flags) == -1) {
        return errno;
    }
#else
    int on = 0;
    if (setsockopt(sd, SOL_SOCKET, SO_NONBLOCK, &on, sizeof(int)) < 0)
        return errno;
#endif /* BEOS */
    return APR_SUCCESS;
}

static apr_status_t sononblock(int sd)
{
#ifndef BEOS
    int fd_flags;

    fd_flags = fcntl(sd, F_GETFL, 0);
#if defined(O_NONBLOCK)
    fd_flags |= O_NONBLOCK;
#elif defined(O_NDELAY)
    fd_flags |= O_NDELAY;
#elif defined(FNDELAY)
    fd_flags |= FNDELAY;
#else
#error Please teach APR how to make sockets non-blocking on your platform.
#endif
    if (fcntl(sd, F_SETFL, fd_flags) == -1) {
        return errno;
    }
#else
    int on = 1;
    if (setsockopt(sd, SOL_SOCKET, SO_NONBLOCK, &on, sizeof(int)) < 0)
        return errno;
#endif /* BEOS */
    return APR_SUCCESS;
}


apr_status_t apr_socket_timeout_set(apr_socket_t *sock, apr_interval_time_t t)
{
    apr_status_t stat;

    /* If our timeout is positive or zero and our last timeout was
     * negative, then we need to ensure that we are non-blocking.
     * Conversely, if our timeout is negative and we had a positive
     * or zero timeout, we must make sure our socket is blocking.
     * We want to avoid calling fcntl more than necessary on the socket,
     */
    if (t >= 0 && sock->timeout < 0) {
        if (apr_is_option_set(sock->netmask, APR_SO_NONBLOCK) != 1) {
            if ((stat = sononblock(sock->socketdes)) != APR_SUCCESS) {
                return stat;
            }
            apr_set_option(&sock->netmask, APR_SO_NONBLOCK, 1);
        }
    } 
    else if (t < 0 && sock->timeout >= 0) {
        if (apr_is_option_set(sock->netmask, APR_SO_NONBLOCK) != 0) { 
            if ((stat = soblock(sock->socketdes)) != APR_SUCCESS) { 
                return stat; 
            }
            apr_set_option(&sock->netmask, APR_SO_NONBLOCK, 0);
        } 
    }
    /* must disable the incomplete read support if we disable
     * a timeout
     */
    if (t <= 0) {
        sock->netmask &= ~APR_INCOMPLETE_READ;
    }
    sock->timeout = t; 
    apr_set_option(&sock->netmask, APR_SO_TIMEOUT, t > 0);
    return APR_SUCCESS;
}


apr_status_t apr_socket_opt_set(apr_socket_t *sock, 
                                apr_int32_t opt, apr_int32_t on)
{
    int one;
    apr_status_t rv;

    if (on)
        one = 1;
    else
        one = 0;
    switch(opt) {
    case APR_SO_KEEPALIVE:
#ifdef SO_KEEPALIVE
        if (on != apr_is_option_set(sock->netmask, APR_SO_KEEPALIVE)) {
            if (setsockopt(sock->socketdes, SOL_SOCKET, SO_KEEPALIVE, (void *)&one, sizeof(int)) == -1) {
                return errno;
            }
            apr_set_option(&sock->netmask,APR_SO_KEEPALIVE, on);
        }
#else
        return APR_ENOTIMPL;
#endif
        break;
    case APR_SO_DEBUG:
        if (on != apr_is_option_set(sock->netmask, APR_SO_DEBUG)) {
            if (setsockopt(sock->socketdes, SOL_SOCKET, SO_DEBUG, (void *)&one, sizeof(int)) == -1) {
                return errno;
            }
            apr_set_option(&sock->netmask, APR_SO_DEBUG, on);
        }
        break;
    case APR_SO_REUSEADDR:
        if (on != apr_is_option_set(sock->netmask, APR_SO_REUSEADDR)) {
            if (setsockopt(sock->socketdes, SOL_SOCKET, SO_REUSEADDR, (void *)&one, sizeof(int)) == -1) {
                return errno;
            }
            apr_set_option(&sock->netmask, APR_SO_REUSEADDR, on);
        }
        break;
    case APR_SO_SNDBUF:
#ifdef SO_SNDBUF
        if (setsockopt(sock->socketdes, SOL_SOCKET, SO_SNDBUF, (void *)&on, sizeof(int)) == -1) {
            return errno;
        }
#else
        return APR_ENOTIMPL;
#endif
        break;
    case APR_SO_RCVBUF:
#ifdef SO_RCVBUF
        if (setsockopt(sock->socketdes, SOL_SOCKET, SO_RCVBUF, (void *)&on, sizeof(int)) == -1) {
            return errno;
        }
#else
        return APR_ENOTIMPL;
#endif
        break;
    case APR_SO_NONBLOCK:
        if (apr_is_option_set(sock->netmask, APR_SO_NONBLOCK) != on) {
            if (on) {
                if ((rv = sononblock(sock->socketdes)) != APR_SUCCESS) 
                    return rv;
            }
            else {
                if ((rv = soblock(sock->socketdes)) != APR_SUCCESS)
                    return rv;
            }
            apr_set_option(&sock->netmask, APR_SO_NONBLOCK, on);
        }
        break;
    case APR_SO_LINGER:
#ifdef SO_LINGER
        if (apr_is_option_set(sock->netmask, APR_SO_LINGER) != on) {
            struct linger li;
            li.l_onoff = on;
            li.l_linger = APR_MAX_SECS_TO_LINGER;
            if (setsockopt(sock->socketdes, SOL_SOCKET, SO_LINGER, (char *) &li, sizeof(struct linger)) == -1) {
                return errno;
            }
            apr_set_option(&sock->netmask, APR_SO_LINGER, on);
        }
#else
        return APR_ENOTIMPL;
#endif
        break;
    case APR_SO_TIMEOUT:
        /* XXX: To be deprecated */
        return apr_socket_timeout_set(sock, on);
        break;
    case APR_TCP_NODELAY:
#if defined(TCP_NODELAY)
        if (apr_is_option_set(sock->netmask, APR_TCP_NODELAY) != on) {
            int optlevel = IPPROTO_TCP;
            int optname = TCP_NODELAY;

#if APR_HAVE_SCTP
            if (sock->protocol == IPPROTO_SCTP) {
                optlevel = IPPROTO_SCTP;
                optname = SCTP_NODELAY;
            }
#endif
            if (setsockopt(sock->socketdes, optlevel, optname, (void *)&on, sizeof(int)) == -1) {
                return errno;
            }
            apr_set_option(&sock->netmask, APR_TCP_NODELAY, on);
        }
#else
        /* BeOS pre-BONE has TCP_NODELAY set by default.
         * As it can't be turned off we might as well check if they're asking
         * for it to be turned on!
         */
#ifdef BEOS
        if (on == 1)
            return APR_SUCCESS;
        else
#endif
        return APR_ENOTIMPL;
#endif
        break;
    case APR_TCP_NOPUSH:
#if APR_TCP_NOPUSH_FLAG
        if (apr_is_option_set(sock->netmask, APR_TCP_NOPUSH) != on) {
            int optlevel = IPPROTO_TCP;
            int optname = TCP_NODELAY;

#if APR_HAVE_SCTP
            if (sock->protocol == IPPROTO_SCTP) {
                optlevel = IPPROTO_SCTP;
                optname = SCTP_NODELAY;
            }
#endif
            /* OK we're going to change some settings here... */
            /* TCP_NODELAY is mutually exclusive, so do we have it set? */
            if (apr_is_option_set(sock->netmask, APR_TCP_NODELAY) == 1 && on) {
                /* If we want to set NOPUSH then if we have the TCP_NODELAY
                 * flag set we need to switch it off...
                 */
                int tmpflag = 0;
                if (setsockopt(sock->socketdes, optlevel, optname,
                               (void*)&tmpflag, sizeof(int)) == -1) {
                    return errno;
                }
                apr_set_option(&sock->netmask, APR_RESET_NODELAY, 1);
                apr_set_option(&sock->netmask, APR_TCP_NODELAY, 0);
            } else if (on) {
                apr_set_option(&sock->netmask, APR_RESET_NODELAY, 0);
            }
            /* OK, now we can just set the TCP_NOPUSH flag accordingly...*/
            if (setsockopt(sock->socketdes, IPPROTO_TCP, APR_TCP_NOPUSH_FLAG,
                           (void*)&on, sizeof(int)) == -1) {
                return errno;
            }
            apr_set_option(&sock->netmask, APR_TCP_NOPUSH, on);
            if (!on && apr_is_option_set(sock->netmask, APR_RESET_NODELAY)) {
                int tmpflag = 1;
                if (setsockopt(sock->socketdes, optlevel, optname,
                               (void*)&tmpflag, sizeof(int)) == -1) {
                    return errno;
                }
                apr_set_option(&sock->netmask, APR_RESET_NODELAY,0);
                apr_set_option(&sock->netmask, APR_TCP_NODELAY, 1);
            }
        }
#else
        return APR_ENOTIMPL;
#endif
        break;
    case APR_INCOMPLETE_READ:
        apr_set_option(&sock->netmask, APR_INCOMPLETE_READ, on);
        break;
    case APR_IPV6_V6ONLY:
#if APR_HAVE_IPV6 && defined(IPV6_V6ONLY)
        /* we don't know the initial setting of this option,
         * so don't check sock->netmask since that optimization
         * won't work
         */
        if (setsockopt(sock->socketdes, IPPROTO_IPV6, IPV6_V6ONLY,
                       (void *)&on, sizeof(int)) == -1) {
            return errno;
        }
        apr_set_option(&sock->netmask, APR_IPV6_V6ONLY, on);
#else
        return APR_ENOTIMPL;
#endif
        break;
    default:
        return APR_EINVAL;
    }

    return APR_SUCCESS; 
}         


apr_status_t apr_socket_timeout_get(apr_socket_t *sock, apr_interval_time_t *t)
{
    *t = sock->timeout;
    return APR_SUCCESS;
}


apr_status_t apr_socket_opt_get(apr_socket_t *sock, 
                                apr_int32_t opt, apr_int32_t *on)
{
    switch(opt) {
        case APR_SO_TIMEOUT:
            /* XXX: To be deprecated */
            *on = (apr_int32_t)sock->timeout;
            break;
        default:
            *on = apr_is_option_set(sock->netmask, opt);
    }
    return APR_SUCCESS;
}


apr_status_t apr_socket_atmark(apr_socket_t *sock, int *atmark)
{
/* In 1.0 we rely on compile failure to assure all platforms grabbed
 * the correct header file support for SIOCATMARK, but we don't want 
 * to fail the build of 0.9.  Keep things good for the released branch.
 */
#ifdef SIOCATMARK
    int oobmark;

    if (ioctl(sock->socketdes, SIOCATMARK, (void*) &oobmark) < 0)
        return apr_get_netos_error();

    *atmark = (oobmark != 0);

    return APR_SUCCESS;
#else
    return APR_ENOTIMPL;
#endif
}


/* deprecated */
apr_status_t apr_setsocketopt(apr_socket_t *sock,
                              apr_int32_t opt, apr_int32_t on)
{
    return apr_socket_opt_set(sock, opt, on);
}

apr_status_t apr_getsocketopt(apr_socket_t *sock,
                              apr_int32_t opt, apr_int32_t *on)
{
    return apr_socket_opt_get(sock, opt, on);
}
                                           

apr_status_t apr_gethostname(char *buf, apr_int32_t len, apr_pool_t *cont)
{
    if (gethostname(buf, len) == -1) {
        buf[0] = '\0';
        return errno;
    }
    else if (!memchr(buf, '\0', len)) { /* buffer too small */
        /* note... most platforms just truncate in this condition
         *         linux+glibc return an error
         */
        buf[0] = '\0';
        return APR_ENAMETOOLONG;
    }
    return APR_SUCCESS;
}

#if APR_HAS_SO_ACCEPTFILTER
apr_status_t apr_socket_accept_filter(apr_socket_t *sock, char *name, 
                                      char *args)
{
    struct accept_filter_arg af;
    strncpy(af.af_name, name, 16);
    strncpy(af.af_arg, args, 256 - 16);

    if ((setsockopt(sock->socketdes, SOL_SOCKET, SO_ACCEPTFILTER,
          &af, sizeof(af))) < 0) {
        return errno;
    }
    return APR_SUCCESS;
}
#endif