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/* Copyright 2000-2005 The Apache Software Foundation or its licensors, as
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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#include "apr_arch_networkio.h"
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#include "apr_strings.h"
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static apr_status_t soblock(int sd)
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/* BeOS uses setsockopt at present for non blocking... */
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fd_flags = fcntl(sd, F_GETFL, 0);
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#if defined(O_NONBLOCK)
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fd_flags &= ~O_NONBLOCK;
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#elif defined(O_NDELAY)
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fd_flags &= ~O_NDELAY;
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#elif defined(FNDELAY)
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#error Please teach APR how to make sockets blocking on your platform.
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if (fcntl(sd, F_SETFL, fd_flags) == -1) {
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if (setsockopt(sd, SOL_SOCKET, SO_NONBLOCK, &on, sizeof(int)) < 0)
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static apr_status_t sononblock(int sd)
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fd_flags = fcntl(sd, F_GETFL, 0);
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#if defined(O_NONBLOCK)
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fd_flags |= O_NONBLOCK;
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#elif defined(O_NDELAY)
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#elif defined(FNDELAY)
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#error Please teach APR how to make sockets non-blocking on your platform.
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if (fcntl(sd, F_SETFL, fd_flags) == -1) {
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if (setsockopt(sd, SOL_SOCKET, SO_NONBLOCK, &on, sizeof(int)) < 0)
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apr_status_t apr_socket_timeout_set(apr_socket_t *sock, apr_interval_time_t t)
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/* If our new timeout is non-negative and our old timeout was
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* negative, then we need to ensure that we are non-blocking.
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* Conversely, if our new timeout is negative and we had
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* non-negative timeout, we must make sure our socket is blocking.
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* We want to avoid calling fcntl more than necessary on the
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if (t >= 0 && sock->timeout < 0) {
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if (apr_is_option_set(sock, APR_SO_NONBLOCK) != 1) {
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if ((stat = sononblock(sock->socketdes)) != APR_SUCCESS) {
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apr_set_option(sock, APR_SO_NONBLOCK, 1);
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else if (t < 0 && sock->timeout >= 0) {
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if (apr_is_option_set(sock, APR_SO_NONBLOCK) != 0) {
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if ((stat = soblock(sock->socketdes)) != APR_SUCCESS) {
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apr_set_option(sock, APR_SO_NONBLOCK, 0);
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/* must disable the incomplete read support if we disable
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sock->options &= ~APR_INCOMPLETE_READ;
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apr_status_t apr_socket_opt_set(apr_socket_t *sock,
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apr_int32_t opt, apr_int32_t on)
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case APR_SO_KEEPALIVE:
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if (on != apr_is_option_set(sock, APR_SO_KEEPALIVE)) {
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if (setsockopt(sock->socketdes, SOL_SOCKET, SO_KEEPALIVE, (void *)&one, sizeof(int)) == -1) {
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apr_set_option(sock, APR_SO_KEEPALIVE, on);
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if (on != apr_is_option_set(sock, APR_SO_DEBUG)) {
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if (setsockopt(sock->socketdes, SOL_SOCKET, SO_DEBUG, (void *)&one, sizeof(int)) == -1) {
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apr_set_option(sock, APR_SO_DEBUG, on);
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case APR_SO_REUSEADDR:
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if (on != apr_is_option_set(sock, APR_SO_REUSEADDR)) {
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if (setsockopt(sock->socketdes, SOL_SOCKET, SO_REUSEADDR, (void *)&one, sizeof(int)) == -1) {
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apr_set_option(sock, APR_SO_REUSEADDR, on);
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if (setsockopt(sock->socketdes, SOL_SOCKET, SO_SNDBUF, (void *)&on, sizeof(int)) == -1) {
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if (setsockopt(sock->socketdes, SOL_SOCKET, SO_RCVBUF, (void *)&on, sizeof(int)) == -1) {
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case APR_SO_NONBLOCK:
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if (apr_is_option_set(sock, APR_SO_NONBLOCK) != on) {
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if ((rv = sononblock(sock->socketdes)) != APR_SUCCESS)
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if ((rv = soblock(sock->socketdes)) != APR_SUCCESS)
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apr_set_option(sock, APR_SO_NONBLOCK, on);
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if (apr_is_option_set(sock, APR_SO_LINGER) != on) {
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li.l_linger = APR_MAX_SECS_TO_LINGER;
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if (setsockopt(sock->socketdes, SOL_SOCKET, SO_LINGER, (char *) &li, sizeof(struct linger)) == -1) {
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apr_set_option(sock, APR_SO_LINGER, on);
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case APR_TCP_DEFER_ACCEPT:
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#if defined(TCP_DEFER_ACCEPT)
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if (apr_is_option_set(sock, APR_TCP_DEFER_ACCEPT) != on) {
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int optlevel = IPPROTO_TCP;
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int optname = TCP_DEFER_ACCEPT;
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if (setsockopt(sock->socketdes, optlevel, optname,
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(void *)&on, sizeof(int)) == -1) {
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apr_set_option(sock, APR_TCP_DEFER_ACCEPT, on);
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case APR_TCP_NODELAY:
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#if defined(TCP_NODELAY)
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if (apr_is_option_set(sock, APR_TCP_NODELAY) != on) {
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int optlevel = IPPROTO_TCP;
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int optname = TCP_NODELAY;
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if (sock->protocol == IPPROTO_SCTP) {
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optlevel = IPPROTO_SCTP;
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optname = SCTP_NODELAY;
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if (setsockopt(sock->socketdes, optlevel, optname, (void *)&on, sizeof(int)) == -1) {
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apr_set_option(sock, APR_TCP_NODELAY, on);
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/* BeOS pre-BONE has TCP_NODELAY set by default.
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* As it can't be turned off we might as well check if they're asking
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* for it to be turned on!
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#if APR_TCP_NOPUSH_FLAG
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/* TCP_NODELAY and TCP_CORK are mutually exclusive on Linux
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* kernels < 2.6; on newer kernels they can be used together
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* and TCP_CORK takes preference, which is the desired
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* behaviour. On older kernels, TCP_NODELAY must be toggled
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* to "off" whilst TCP_CORK is in effect. */
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if (apr_is_option_set(sock, APR_TCP_NOPUSH) != on) {
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#ifndef HAVE_TCP_NODELAY_WITH_CORK
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int optlevel = IPPROTO_TCP;
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int optname = TCP_NODELAY;
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if (sock->protocol == IPPROTO_SCTP) {
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optlevel = IPPROTO_SCTP;
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optname = SCTP_NODELAY;
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/* OK we're going to change some settings here... */
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if (apr_is_option_set(sock, APR_TCP_NODELAY) == 1 && on) {
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/* Now toggle TCP_NODELAY to off, if TCP_CORK is being
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if (setsockopt(sock->socketdes, optlevel, optname,
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(void*)&tmpflag, sizeof(int)) == -1) {
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apr_set_option(sock, APR_RESET_NODELAY, 1);
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apr_set_option(sock, APR_TCP_NODELAY, 0);
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apr_set_option(sock, APR_RESET_NODELAY, 0);
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#endif /* HAVE_TCP_NODELAY_WITH_CORK */
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/* OK, now we can just set the TCP_NOPUSH flag accordingly...*/
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if (setsockopt(sock->socketdes, IPPROTO_TCP, APR_TCP_NOPUSH_FLAG,
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(void*)&on, sizeof(int)) == -1) {
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apr_set_option(sock, APR_TCP_NOPUSH, on);
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#ifndef HAVE_TCP_NODELAY_WITH_CORK
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if (!on && apr_is_option_set(sock, APR_RESET_NODELAY)) {
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/* Now, if TCP_CORK was just turned off, turn
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* TCP_NODELAY back on again if it was earlier toggled
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if (setsockopt(sock->socketdes, optlevel, optname,
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(void*)&tmpflag, sizeof(int)) == -1) {
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apr_set_option(sock, APR_RESET_NODELAY,0);
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apr_set_option(sock, APR_TCP_NODELAY, 1);
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#endif /* HAVE_TCP_NODELAY_WITH_CORK */
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case APR_INCOMPLETE_READ:
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apr_set_option(sock, APR_INCOMPLETE_READ, on);
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case APR_IPV6_V6ONLY:
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#if APR_HAVE_IPV6 && defined(IPV6_V6ONLY)
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/* we don't know the initial setting of this option,
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* so don't check sock->options since that optimization
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if (setsockopt(sock->socketdes, IPPROTO_IPV6, IPV6_V6ONLY,
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(void *)&on, sizeof(int)) == -1) {
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apr_set_option(sock, APR_IPV6_V6ONLY, on);
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apr_status_t apr_socket_timeout_get(apr_socket_t *sock, apr_interval_time_t *t)
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apr_status_t apr_socket_opt_get(apr_socket_t *sock,
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apr_int32_t opt, apr_int32_t *on)
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*on = apr_is_option_set(sock, opt);
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apr_status_t apr_socket_atmark(apr_socket_t *sock, int *atmark)
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if (ioctl(sock->socketdes, SIOCATMARK, (void*) &oobmark) < 0)
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return apr_get_netos_error();
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*atmark = (oobmark != 0);
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apr_status_t apr_gethostname(char *buf, apr_int32_t len, apr_pool_t *cont)
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if (gethostname(buf, len) == 0) {
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if (gethostname(buf, len) != 0) {
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else if (!memchr(buf, '\0', len)) { /* buffer too small */
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/* note... most platforms just truncate in this condition
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* linux+glibc return an error
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return APR_ENAMETOOLONG;
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#if APR_HAS_SO_ACCEPTFILTER
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apr_status_t apr_socket_accept_filter(apr_socket_t *sock, char *name,
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struct accept_filter_arg af;
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strncpy(af.af_name, name, 16);
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strncpy(af.af_arg, args, 256 - 16);
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if ((setsockopt(sock->socketdes, SOL_SOCKET, SO_ACCEPTFILTER,
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&af, sizeof(af))) < 0) {