X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Flistensocket.cpp;h=0145f86d8cdf8f520a5d3450bf46551e8a74eff9;hb=fa676cfc88cea1b167fd91f280202f9e1d35c1ca;hp=58934e54312d756267a0369b355da5d0afb27bb0;hpb=77b7c4300472ff1ba5c643b75ead4be75625f96f;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/listensocket.cpp b/src/listensocket.cpp index 58934e543..0145f86d8 100644 --- a/src/listensocket.cpp +++ b/src/listensocket.cpp @@ -2,8 +2,8 @@ * | Inspire Internet Relay Chat Daemon | * +------------------------------------+ * - * InspIRCd: (C) 2002-2008 InspIRCd Development Team - * See: http://www.inspircd.org/wiki/index.php/Credits + * InspIRCd: (C) 2002-2009 InspIRCd Development Team + * See: http://wiki.inspircd.org/Credits * * This program is free but copyrighted software; see * the file COPYING for details. @@ -17,41 +17,31 @@ #include "socket.h" #include "socketengine.h" +/* Private static member data must be declared in this manner */ +irc::sockets::sockaddrs ListenSocketBase::client; +irc::sockets::sockaddrs ListenSocketBase::server; -/* Private static member data must be initialized in this manner */ -unsigned int ListenSocket::socketcount = 0; -sockaddr* ListenSocket::sock_us = NULL; -sockaddr* ListenSocket::client = NULL; -sockaddr* ListenSocket::raddr = NULL; - -ListenSocket::ListenSocket(InspIRCd* Instance, int port, char* addr) : ServerInstance(Instance), desc("plaintext"), bind_addr(addr), bind_port(port) +ListenSocketBase::ListenSocketBase(InspIRCd* Instance, int port, const std::string &addr) : ServerInstance(Instance), desc("plaintext") { - this->SetFd(irc::sockets::OpenTCPSocket(addr)); + irc::sockets::sockaddrs bind_to; + + bind_addr = addr; + bind_port = port; + + // 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); + + this->SetFd(irc::sockets::OpenTCPSocket(bind_addr.c_str())); if (this->GetFd() > -1) { - if (!Instance->BindSocket(this->fd,port,addr)) + if (!Instance->BindSocket(this->fd,port,bind_addr.c_str())) this->fd = -1; -#ifdef IPV6 - if ((!*addr) || (strchr(addr,':'))) - this->family = AF_INET6; - else -#endif - this->family = AF_INET; Instance->SE->AddFd(this); } - /* Saves needless allocations */ - if (socketcount == 0) - { - /* All instances of ListenSocket share these, so reference count it */ - ServerInstance->Logs->Log("SOCKET", DEBUG,"Allocate sockaddr structures"); - sock_us = new sockaddr[2]; - client = new sockaddr[2]; - raddr = new sockaddr[2]; - } - socketcount++; } -ListenSocket::~ListenSocket() +ListenSocketBase::~ListenSocketBase() { if (this->GetFd() > -1) { @@ -61,39 +51,18 @@ ListenSocket::~ListenSocket() ServerInstance->Logs->Log("SOCKET", DEBUG,"Failed to cancel listener: %s", strerror(errno)); this->fd = -1; } - socketcount--; - if (socketcount == 0) - { - delete[] sock_us; - delete[] client; - delete[] raddr; - } } /* Just seperated into another func for tidiness really.. */ -void ListenSocket::AcceptInternal() +void ListenSocketBase::AcceptInternal() { ServerInstance->Logs->Log("SOCKET",DEBUG,"HandleEvent for Listensoket"); - socklen_t uslen, length; // length of our port number int incomingSockfd; -#ifdef IPV6 - if (this->family == AF_INET6) - { - uslen = sizeof(sockaddr_in6); - length = sizeof(sockaddr_in6); - } - else -#endif - { - uslen = sizeof(sockaddr_in); - length = sizeof(sockaddr_in); - } - - incomingSockfd = ServerInstance->SE->Accept(this, (sockaddr*)client, &length); + socklen_t length = sizeof(client); + incomingSockfd = ServerInstance->SE->Accept(this, &client.sa, &length); - if (incomingSockfd < 0 || - ServerInstance->SE->GetSockName(this, sock_us, &uslen) == -1) + if (incomingSockfd < 0) { ServerInstance->SE->Shutdown(incomingSockfd, 2); ServerInstance->SE->Close(incomingSockfd); @@ -101,38 +70,73 @@ void ListenSocket::AcceptInternal() return; } - static char buf[MAXBUF]; - static char target[MAXBUF]; - - *target = *buf = '\0'; - -#ifdef IPV6 - if (this->family == AF_INET6) + socklen_t sz = sizeof(server); + if (getsockname(incomingSockfd, &server.sa, &sz)) + ServerInstance->Logs->Log("SOCKET", DEBUG, "Can't get peername: %s", strerror(errno)); + + /* + * XXX - + * this is done as a safety check to keep the file descriptors within range of fd_ref_table. + * its a pretty big but for the moment valid assumption: + * file descriptors are handed out starting at 0, and are recycled as theyre freed. + * therefore if there is ever an fd over 65535, 65536 clients must be connected to the + * irc server at once (or the irc server otherwise initiating this many connections, files etc) + * which for the time being is a physical impossibility (even the largest networks dont have more + * than about 10,000 users on ONE server!) + */ + if (incomingSockfd >= ServerInstance->SE->GetMaxFds()) { - inet_ntop(AF_INET6, &((const sockaddr_in6*)client)->sin6_addr, buf, sizeof(buf)); - socklen_t raddrsz = sizeof(sockaddr_in6); - if (getsockname(incomingSockfd, (sockaddr*) raddr, &raddrsz) == 0) - inet_ntop(AF_INET6, &((const sockaddr_in6*)raddr)->sin6_addr, target, sizeof(target)); - else - ServerInstance->Logs->Log("SOCKET", DEBUG, "Can't get peername: %s", strerror(errno)); + ServerInstance->Logs->Log("SOCKET", DEBUG, "Server is full"); + ServerInstance->SE->Shutdown(incomingSockfd, 2); + ServerInstance->SE->Close(incomingSockfd); + ServerInstance->stats->statsRefused++; + return; } - else -#endif + + if (client.sa.sa_family == AF_INET6) { - inet_ntop(AF_INET, &((const sockaddr_in*)client)->sin_addr, buf, sizeof(buf)); - socklen_t raddrsz = sizeof(sockaddr_in); - if (getsockname(incomingSockfd, (sockaddr*) raddr, &raddrsz) == 0) - inet_ntop(AF_INET, &((const sockaddr_in*)raddr)->sin_addr, target, sizeof(target)); - else - ServerInstance->Logs->Log("SOCKET", DEBUG, "Can't get peername: %s", strerror(errno)); + /* + * This case is the be all and end all patch to catch and nuke 4in6 + * instead of special-casing shit all over the place and wreaking merry + * havoc with crap, instead, we just recreate sockaddr and strip ::ffff: prefix + * if it's a 4in6 IP. + * + * This is, of course, much improved over the older way of handling this + * (pretend it doesn't exist + hack around it -- yes, both were done!) + * + * Big, big thanks to danieldg for his work on this. + * -- w00t + */ + static const unsigned char prefix4in6[12] = { 0,0,0,0, 0,0,0,0, 0,0,0xFF,0xFF }; + if (!memcmp(prefix4in6, &client.in6.sin6_addr, 12)) + { + // 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; + + 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; + } } + 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(target, incomingSockfd); + this->OnAcceptReady(server_addr, incomingSockfd, client_addr); } -void ListenSocket::HandleEvent(EventType e, int err) +void ListenSocketBase::HandleEvent(EventType e, int err) { switch (e) { @@ -148,7 +152,7 @@ void ListenSocket::HandleEvent(EventType e, int err) } } -void ListenSocket::OnAcceptReady(const std::string &ipconnectedto, int nfd) +void ClientListenSocket::OnAcceptReady(const std::string &ipconnectedto, int nfd, const std::string &incomingip) { - ServerInstance->Users->AddUser(ServerInstance, nfd, bind_port, false, this->family, client, ipconnectedto); + ServerInstance->Users->AddUser(ServerInstance, nfd, bind_port, false, &client.sa, ipconnectedto); }