2019-03-06 01:07:13 +01:00
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/*
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* libwebsockets - small server side websockets and web server implementation
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*
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* Copyright (C) 2010-2018 Andy Green <andy@warmcat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation:
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* version 2.1 of the License.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#define _GNU_SOURCE
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#include "core/private.h"
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#include <pwd.h>
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#include <grp.h>
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int
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lws_send_pipe_choked(struct lws *wsi)
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{
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struct lws_pollfd fds;
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struct lws *wsi_eff;
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#if defined(LWS_WITH_HTTP2)
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wsi_eff = lws_get_network_wsi(wsi);
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#else
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wsi_eff = wsi;
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#endif
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/* the fact we checked implies we avoided back-to-back writes */
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wsi_eff->could_have_pending = 0;
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/* treat the fact we got a truncated send pending as if we're choked */
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if (lws_has_buffered_out(wsi_eff)
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#if defined(LWS_WITH_HTTP_STREAM_COMPRESSION)
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||wsi->http.comp_ctx.buflist_comp ||
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wsi->http.comp_ctx.may_have_more
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#endif
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)
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return 1;
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fds.fd = wsi_eff->desc.sockfd;
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fds.events = POLLOUT;
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fds.revents = 0;
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if (poll(&fds, 1, 0) != 1)
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return 1;
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if ((fds.revents & POLLOUT) == 0)
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return 1;
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/* okay to send another packet without blocking */
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return 0;
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}
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int
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lws_plat_set_socket_options(struct lws_vhost *vhost, int fd, int unix_skt)
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{
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int optval = 1;
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socklen_t optlen = sizeof(optval);
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2019-03-06 06:29:19 +01:00
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#ifdef LWS_WITH_IPV6
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optval = 0;
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setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (const void*)&optval, optlen);
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#endif
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2019-03-06 01:07:13 +01:00
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#if defined(__APPLE__) || \
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defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
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defined(__NetBSD__) || \
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defined(__OpenBSD__) || \
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defined(__HAIKU__)
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struct protoent *tcp_proto;
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#endif
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(void)fcntl(fd, F_SETFD, FD_CLOEXEC);
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if (!unix_skt && vhost->ka_time) {
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/* enable keepalive on this socket */
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optval = 1;
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if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE,
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(const void *)&optval, optlen) < 0)
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return 1;
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#if defined(__APPLE__) || \
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defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
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defined(__NetBSD__) || \
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defined(__CYGWIN__) || defined(__OpenBSD__) || defined (__sun) || \
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defined(__HAIKU__)
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/*
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* didn't find a way to set these per-socket, need to
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* tune kernel systemwide values
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*/
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#else
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/* set the keepalive conditions we want on it too */
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#if defined(LWS_HAVE_TCP_USER_TIMEOUT)
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optval = 1000 * (vhost->ka_time +
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(vhost->ka_interval * vhost->ka_probes));
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if (setsockopt(fd, IPPROTO_TCP, TCP_USER_TIMEOUT,
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(const void *)&optval, optlen) < 0)
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return 1;
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#endif
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optval = vhost->ka_time;
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if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE,
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(const void *)&optval, optlen) < 0)
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return 1;
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optval = vhost->ka_interval;
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if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPINTVL,
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(const void *)&optval, optlen) < 0)
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return 1;
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optval = vhost->ka_probes;
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if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT,
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(const void *)&optval, optlen) < 0)
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return 1;
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#endif
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}
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#if defined(SO_BINDTODEVICE)
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if (!unix_skt && vhost->bind_iface && vhost->iface) {
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lwsl_info("binding listen skt to %s using SO_BINDTODEVICE\n", vhost->iface);
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if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, vhost->iface,
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strlen(vhost->iface)) < 0) {
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lwsl_warn("Failed to bind to device %s\n", vhost->iface);
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return 1;
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}
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}
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#endif
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/* Disable Nagle */
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optval = 1;
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#if defined (__sun) || defined(__QNX__)
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if (!unix_skt && setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (const void *)&optval, optlen) < 0)
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return 1;
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#elif !defined(__APPLE__) && \
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!defined(__FreeBSD__) && !defined(__FreeBSD_kernel__) && \
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!defined(__NetBSD__) && \
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!defined(__OpenBSD__) && \
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!defined(__HAIKU__)
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if (!unix_skt && setsockopt(fd, SOL_TCP, TCP_NODELAY, (const void *)&optval, optlen) < 0)
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return 1;
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#else
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tcp_proto = getprotobyname("TCP");
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if (!unix_skt && setsockopt(fd, tcp_proto->p_proto, TCP_NODELAY, &optval, optlen) < 0)
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return 1;
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#endif
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/* We are nonblocking... */
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if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0)
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return 1;
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return 0;
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}
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/* cast a struct sockaddr_in6 * into addr for ipv6 */
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int
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lws_interface_to_sa(int ipv6, const char *ifname, struct sockaddr_in *addr,
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size_t addrlen)
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{
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int rc = LWS_ITOSA_NOT_EXIST;
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struct ifaddrs *ifr;
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struct ifaddrs *ifc;
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#ifdef LWS_WITH_IPV6
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struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
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#endif
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getifaddrs(&ifr);
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for (ifc = ifr; ifc != NULL && rc; ifc = ifc->ifa_next) {
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if (!ifc->ifa_addr)
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continue;
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lwsl_debug(" interface %s vs %s (fam %d) ipv6 %d\n",
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ifc->ifa_name, ifname,
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ifc->ifa_addr->sa_family, ipv6);
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if (strcmp(ifc->ifa_name, ifname))
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continue;
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switch (ifc->ifa_addr->sa_family) {
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#if defined(AF_PACKET)
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case AF_PACKET:
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/* interface exists but is not usable */
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rc = LWS_ITOSA_NOT_USABLE;
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continue;
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#endif
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case AF_INET:
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#ifdef LWS_WITH_IPV6
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if (ipv6) {
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/* map IPv4 to IPv6 */
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bzero((char *)&addr6->sin6_addr,
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sizeof(struct in6_addr));
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addr6->sin6_addr.s6_addr[10] = 0xff;
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addr6->sin6_addr.s6_addr[11] = 0xff;
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memcpy(&addr6->sin6_addr.s6_addr[12],
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&((struct sockaddr_in *)ifc->ifa_addr)->sin_addr,
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sizeof(struct in_addr));
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} else
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#endif
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memcpy(addr,
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(struct sockaddr_in *)ifc->ifa_addr,
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sizeof(struct sockaddr_in));
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break;
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#ifdef LWS_WITH_IPV6
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case AF_INET6:
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memcpy(&addr6->sin6_addr,
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&((struct sockaddr_in6 *)ifc->ifa_addr)->sin6_addr,
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sizeof(struct in6_addr));
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break;
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#endif
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default:
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continue;
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}
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rc = LWS_ITOSA_USABLE;
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}
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freeifaddrs(ifr);
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if (rc) {
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/* check if bind to IP address */
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#ifdef LWS_WITH_IPV6
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if (inet_pton(AF_INET6, ifname, &addr6->sin6_addr) == 1)
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rc = LWS_ITOSA_USABLE;
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else
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#endif
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if (inet_pton(AF_INET, ifname, &addr->sin_addr) == 1)
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rc = LWS_ITOSA_USABLE;
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}
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return rc;
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}
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const char *
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lws_plat_inet_ntop(int af, const void *src, char *dst, int cnt)
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{
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return inet_ntop(af, src, dst, cnt);
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}
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int
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lws_plat_inet_pton(int af, const char *src, void *dst)
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{
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return inet_pton(af, src, dst);
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}
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