X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Flistensocket.cpp;h=9b69b53ff3a3fc35aec3fff81c2bd3bfc6721b1a;hb=4509cbcc0b57f9f397af26f5e8dbe629499c2b24;hp=1daca2a399f1eb68c6d7fe98292a0d9e73412bba;hpb=373db450cc1351e0271054ba620a9485b8896253;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/listensocket.cpp b/src/listensocket.cpp index 1daca2a39..9b69b53ff 100644 --- a/src/listensocket.cpp +++ b/src/listensocket.cpp @@ -1,78 +1,125 @@ -/* +------------------------------------+ - * | Inspire Internet Relay Chat Daemon | - * +------------------------------------+ +/* + * InspIRCd -- Internet Relay Chat Daemon * - * InspIRCd: (C) 2002-2009 InspIRCd Development Team - * See: http://wiki.inspircd.org/Credits + * Copyright (C) 2009-2010 Daniel De Graaf + * Copyright (C) 2008 Robin Burchell * - * This program is free but copyrighted software; see - * the file COPYING for details. + * This file is part of InspIRCd. InspIRCd is free software: you can + * redistribute it and/or modify it under the terms of the GNU General Public + * License as published by the Free Software Foundation, version 2. * - * --------------------------------------------------- + * This program 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 General Public License for more + * details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . */ -/* $Core */ #include "inspircd.h" #include "socket.h" #include "socketengine.h" +#include -/* Private static member data must be declared in this manner */ -irc::sockets::sockaddrs ListenSocketBase::client; -irc::sockets::sockaddrs ListenSocketBase::server; - -ListenSocketBase::ListenSocketBase(InspIRCd* Instance, int port, const std::string &addr) : ServerInstance(Instance), desc("plaintext") +ListenSocket::ListenSocket(ConfigTag* tag, const irc::sockets::sockaddrs& bind_to) + : bind_tag(tag) { - irc::sockets::sockaddrs bind_to; + irc::sockets::satoap(bind_to, bind_addr, bind_port); + bind_desc = irc::sockets::satouser(bind_to); - bind_addr = addr; - bind_port = port; + fd = socket(bind_to.sa.sa_family, SOCK_STREAM, 0); - // canonicalize address if it is defined - if (!addr.empty() && irc::sockets::aptosa(addr.c_str(), port, &bind_to)) - irc::sockets::satoap(&bind_to, bind_addr, bind_port); + if (this->fd == -1) + return; - this->SetFd(irc::sockets::OpenTCPSocket(bind_addr.c_str())); - if (this->GetFd() > -1) +#ifdef IPV6_V6ONLY + /* This OS supports IPv6 sockets that can also listen for IPv4 + * connections. If our address is "*" or empty, enable both v4 and v6 to + * allow for simpler configuration on dual-stack hosts. Otherwise, if it + * is "::" or an IPv6 address, disable support so that an IPv4 bind will + * work on the port (by us or another application). + */ + if (bind_to.sa.sa_family == AF_INET6) + { + std::string addr = tag->getString("address"); + /* This must be >= sizeof(DWORD) on Windows */ + const int enable = (addr.empty() || addr == "*") ? 0 : 1; + /* This must be before bind() */ + setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, reinterpret_cast(&enable), sizeof(enable)); + // errors ignored intentionally + } +#endif + + ServerInstance->SE->SetReuse(fd); + int rv = ServerInstance->SE->Bind(this->fd, bind_to); + if (rv >= 0) + rv = ServerInstance->SE->Listen(this->fd, ServerInstance->Config->MaxConn); + + int timeout = tag->getInt("defer", 0); + if (timeout && !rv) { - if (!Instance->BindSocket(this->fd,port,bind_addr.c_str())) - this->fd = -1; - Instance->SE->AddFd(this); +#if defined TCP_DEFER_ACCEPT + setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &timeout, sizeof(timeout)); +#elif defined SO_ACCEPTFILTER + struct accept_filter_arg afa; + memset(&afa, 0, sizeof(afa)); + strcpy(afa.af_name, "dataready"); + setsockopt(fd, SOL_SOCKET, SO_ACCEPTFILTER, &afa, sizeof(afa)); +#endif + } + + if (rv < 0) + { + int errstore = errno; + ServerInstance->SE->Shutdown(this, 2); + ServerInstance->SE->Close(this); + this->fd = -1; + errno = errstore; + } + else + { + ServerInstance->SE->NonBlocking(this->fd); + ServerInstance->SE->AddFd(this, FD_WANT_POLL_READ | FD_WANT_NO_WRITE); } } -ListenSocketBase::~ListenSocketBase() +ListenSocket::~ListenSocket() { if (this->GetFd() > -1) { ServerInstance->SE->DelFd(this); - ServerInstance->Logs->Log("SOCKET", DEBUG,"Shut down listener on fd %d", this->fd); - if (ServerInstance->SE->Shutdown(this, 2) || ServerInstance->SE->Close(this)) - ServerInstance->Logs->Log("SOCKET", DEBUG,"Failed to cancel listener: %s", strerror(errno)); + ServerInstance->Logs->Log("SOCKET", LOG_DEBUG, "Shut down listener on fd %d", this->fd); + ServerInstance->SE->Shutdown(this, 2); + if (ServerInstance->SE->Close(this) != 0) + ServerInstance->Logs->Log("SOCKET", LOG_DEBUG, "Failed to cancel listener: %s", strerror(errno)); this->fd = -1; } } /* Just seperated into another func for tidiness really.. */ -void ListenSocketBase::AcceptInternal() +void ListenSocket::AcceptInternal() { - ServerInstance->Logs->Log("SOCKET",DEBUG,"HandleEvent for Listensoket"); - int incomingSockfd; + irc::sockets::sockaddrs client; + irc::sockets::sockaddrs server; socklen_t length = sizeof(client); - incomingSockfd = ServerInstance->SE->Accept(this, &client.sa, &length); + int incomingSockfd = ServerInstance->SE->Accept(this, &client.sa, &length); + ServerInstance->Logs->Log("SOCKET", LOG_DEBUG, "HandleEvent for Listensocket %s nfd=%d", bind_desc.c_str(), incomingSockfd); if (incomingSockfd < 0) { - ServerInstance->SE->Shutdown(incomingSockfd, 2); - ServerInstance->SE->Close(incomingSockfd); ServerInstance->stats->statsRefused++; return; } socklen_t sz = sizeof(server); - if (getsockname(incomingSockfd, &server.sa, &sz)); - ServerInstance->Logs->Log("SOCKET", DEBUG, "Can't get peername: %s", strerror(errno)); + if (getsockname(incomingSockfd, &server.sa, &sz)) + { + ServerInstance->Logs->Log("SOCKET", LOG_DEBUG, "Can't get peername: %s", strerror(errno)); + irc::sockets::aptosa(bind_addr, bind_port, server); + } /* * XXX - @@ -86,7 +133,7 @@ void ListenSocketBase::AcceptInternal() */ if (incomingSockfd >= ServerInstance->SE->GetMaxFds()) { - ServerInstance->Logs->Log("SOCKET", DEBUG, "Server is full"); + ServerInstance->Logs->Log("SOCKET", LOG_DEBUG, "Server is full"); ServerInstance->SE->Shutdown(incomingSockfd, 2); ServerInstance->SE->Close(incomingSockfd); ServerInstance->stats->statsRefused++; @@ -112,47 +159,55 @@ void ListenSocketBase::AcceptInternal() { // recreate as a sockaddr_in using the IPv4 IP uint16_t sport = client.in6.sin6_port; - uint32_t addr = *reinterpret_cast(client.in6.sin6_addr.s6_addr + 12); client.in4.sin_family = AF_INET; client.in4.sin_port = sport; - client.in4.sin_addr.s_addr = addr; + memcpy(&client.in4.sin_addr.s_addr, client.in6.sin6_addr.s6_addr + 12, sizeof(uint32_t)); sport = server.in6.sin6_port; - addr = *reinterpret_cast(server.in6.sin6_addr.s6_addr + 12); server.in4.sin_family = AF_INET; server.in4.sin_port = sport; - server.in4.sin_addr.s_addr = addr; + memcpy(&server.in4.sin_addr.s_addr, server.in6.sin6_addr.s6_addr + 12, sizeof(uint32_t)); } } - std::string server_addr; - std::string client_addr; - int dummy_port; - irc::sockets::satoap(&server, server_addr, dummy_port); - irc::sockets::satoap(&client, client_addr, dummy_port); - ServerInstance->SE->NonBlocking(incomingSockfd); - ServerInstance->stats->statsAccept++; - this->OnAcceptReady(server_addr, incomingSockfd, client_addr); + + ModResult res; + FIRST_MOD_RESULT(OnAcceptConnection, res, (incomingSockfd, this, &client, &server)); + if (res == MOD_RES_PASSTHRU) + { + std::string type = bind_tag->getString("type", "clients"); + if (type == "clients") + { + ServerInstance->Users->AddUser(incomingSockfd, this, &client, &server); + res = MOD_RES_ALLOW; + } + } + if (res == MOD_RES_ALLOW) + { + ServerInstance->stats->statsAccept++; + } + else + { + ServerInstance->stats->statsRefused++; + ServerInstance->Logs->Log("SOCKET", LOG_DEFAULT, "Refusing connection on %s - %s", + bind_desc.c_str(), res == MOD_RES_DENY ? "Connection refused by module" : "Module for this port not found"); + ServerInstance->SE->Close(incomingSockfd); + } } -void ListenSocketBase::HandleEvent(EventType e, int err) +void ListenSocket::HandleEvent(EventType e, int err) { switch (e) { case EVENT_ERROR: - ServerInstance->Logs->Log("SOCKET",DEFAULT,"ListenSocket::HandleEvent() received a socket engine error event! well shit! '%s'", strerror(err)); + ServerInstance->Logs->Log("SOCKET", LOG_DEFAULT, "ListenSocket::HandleEvent() received a socket engine error event! well shit! '%s'", strerror(err)); break; case EVENT_WRITE: - ServerInstance->Logs->Log("SOCKET",DEBUG,"*** BUG *** ListenSocket::HandleEvent() got a WRITE event!!!"); + ServerInstance->Logs->Log("SOCKET", LOG_DEBUG, "*** BUG *** ListenSocket::HandleEvent() got a WRITE event!!!"); break; case EVENT_READ: this->AcceptInternal(); break; } } - -void ClientListenSocket::OnAcceptReady(const std::string &ipconnectedto, int nfd, const std::string &incomingip) -{ - ServerInstance->Users->AddUser(ServerInstance, nfd, bind_port, false, &client.sa, ipconnectedto); -}