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