X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fsocket.cpp;h=e73d01af9c37ed37fbdd1909b95dd83dbba0e5af;hb=68211809ee3111bdc9609fbd46dc3c875fbb5ea6;hp=6baa42ed092e1d0ef7b0d39fdbdba89d4a291fc0;hpb=819d0c523d8a7c4446b6d4050be0c4c0e80252eb;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/socket.cpp b/src/socket.cpp index 6baa42ed0..e73d01af9 100644 --- a/src/socket.cpp +++ b/src/socket.cpp @@ -1,399 +1,370 @@ -/* +------------------------------------+ - * | Inspire Internet Relay Chat Daemon | - * +------------------------------------+ +/* + * InspIRCd -- Internet Relay Chat Daemon * - * InspIRCd: (C) 2002-2008 InspIRCd Development Team - * See: http://www.inspircd.org/wiki/index.php/Credits + * Copyright (C) 2009-2010 Daniel De Graaf + * Copyright (C) 2007-2008 Robin Burchell + * Copyright (C) 2005-2008 Craig Edwards + * Copyright (C) 2007 Dennis Friis + * Copyright (C) 2006 Oliver Lupton * - * 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: libIRCDsocket */ #include "inspircd.h" #include "socket.h" #include "socketengine.h" +using irc::sockets::sockaddrs; -/* 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) +/** This will bind a socket to a port. It works for UDP/TCP. + * It can only bind to IP addresses, if you wish to bind to hostnames + * you should first resolve them using class 'Resolver'. + */ +bool InspIRCd::BindSocket(int sockfd, int port, const char* addr, bool dolisten) { - this->SetFd(irc::sockets::OpenTCPSocket(addr)); - if (this->GetFd() > -1) - { - if (!Instance->BindSocket(this->fd,port,addr)) - 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) + sockaddrs servaddr; + int ret; + + if ((*addr == '*' || *addr == '\0') && port == -1) { - /* 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]; + /* Port -1: Means UDP IPV4 port binding - Special case + * used by DNS engine. + */ + memset(&servaddr, 0, sizeof(servaddr)); + servaddr.in4.sin_family = AF_INET; } - socketcount++; -} + else if (!irc::sockets::aptosa(addr, port, servaddr)) + return false; -ListenSocket::~ListenSocket() -{ - if (this->GetFd() > -1) + ret = SE->Bind(sockfd, servaddr); + + if (ret < 0) { - 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)); - this->fd = -1; + return false; } - socketcount--; - if (socketcount == 0) + else { - delete[] sock_us; - delete[] client; - delete[] raddr; + if (dolisten) + { + if (SE->Listen(sockfd, Config->MaxConn) == -1) + { + this->Logs->Log("SOCKET",DEFAULT,"ERROR in listen(): %s",strerror(errno)); + return false; + } + else + { + this->Logs->Log("SOCKET",DEBUG,"New socket binding for %d with listen: %s:%d", sockfd, addr, port); + SE->NonBlocking(sockfd); + return true; + } + } + else + { + this->Logs->Log("SOCKET",DEBUG,"New socket binding for %d without listen: %s:%d", sockfd, addr, port); + return true; + } } } -void ListenSocket::HandleEvent(EventType e, int err) +int InspIRCd::BindPorts(FailedPortList &failed_ports) { - switch (e) + int bound = 0; + std::vector old_ports(ports.begin(), ports.end()); + + ConfigTagList tags = ServerInstance->Config->ConfTags("bind"); + for(ConfigIter i = tags.first; i != tags.second; ++i) { - case EVENT_ERROR: - ServerInstance->Logs->Log("SOCKET",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!!!"); - break; - case EVENT_READ: + ConfigTag* tag = i->second; + std::string porttag = tag->getString("port"); + std::string Addr = tag->getString("address"); + + if (strncasecmp(Addr.c_str(), "::ffff:", 7) == 0) + this->Logs->Log("SOCKET",DEFAULT, "Using 4in6 (::ffff:) isn't recommended. You should bind IPv4 addresses directly instead."); + + irc::portparser portrange(porttag, false); + int portno = -1; + while (0 != (portno = portrange.GetToken())) { - ServerInstance->Logs->Log("SOCKET",DEBUG,"HandleEvent for Listensoket"); - socklen_t uslen, length; // length of our port number - int incomingSockfd, in_port; + irc::sockets::sockaddrs bindspec; + if (!irc::sockets::aptosa(Addr, portno, bindspec)) + continue; + std::string bind_readable = bindspec.str(); -#ifdef IPV6 - if (this->family == AF_INET6) + bool skip = false; + for (std::vector::iterator n = old_ports.begin(); n != old_ports.end(); ++n) { - uslen = sizeof(sockaddr_in6); - length = sizeof(sockaddr_in6); + if ((**n).bind_desc == bind_readable) + { + (*n)->bind_tag = tag; // Replace tag, we know addr and port match, but other info (type, ssl) may not + skip = true; + old_ports.erase(n); + break; + } } - else -#endif + if (!skip) { - uslen = sizeof(sockaddr_in); - length = sizeof(sockaddr_in); - } - - incomingSockfd = ServerInstance->SE->Accept(this, (sockaddr*)client, &length); + ListenSocket* ll = new ListenSocket(tag, bindspec); - if ((incomingSockfd > -1) && (!ServerInstance->SE->GetSockName(this, sock_us, &uslen))) - { - char buf[MAXBUF]; - char target[MAXBUF]; - - *target = *buf = '\0'; - -#ifdef IPV6 - if (this->family == AF_INET6) + if (ll->GetFd() > -1) { - in_port = ntohs(((sockaddr_in6*)sock_us)->sin6_port); - 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)); + bound++; + ports.push_back(ll); } else -#endif { - inet_ntop(AF_INET, &((const sockaddr_in*)client)->sin_addr, buf, sizeof(buf)); - in_port = ntohs(((sockaddr_in*)sock_us)->sin_port); - 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)); + failed_ports.push_back(std::make_pair(bind_readable, strerror(errno))); + delete ll; } - ServerInstance->SE->NonBlocking(incomingSockfd); - ServerInstance->stats->statsAccept++; - ServerInstance->Users->AddUser(ServerInstance, incomingSockfd, in_port, false, this->family, client, target); - } - else - { - ServerInstance->SE->Shutdown(incomingSockfd, 2); - ServerInstance->SE->Close(incomingSockfd); - ServerInstance->stats->statsRefused++; } } - break; } -} - -/** This will bind a socket to a port. It works for UDP/TCP. - * It can only bind to IP addresses, if you wish to bind to hostnames - * you should first resolve them using class 'Resolver'. - */ -bool InspIRCd::BindSocket(int sockfd, int port, const char* addr, bool dolisten) -{ - /* We allocate 2 of these, because sockaddr_in6 is larger than sockaddr (ugh, hax) */ - sockaddr* servaddr = new sockaddr[2]; - memset(servaddr,0,sizeof(sockaddr)*2); - - int ret, size; - - if (*addr == '*') - addr = ""; -#ifdef IPV6 - if (*addr) + std::vector::iterator n = ports.begin(); + for (std::vector::iterator o = old_ports.begin(); o != old_ports.end(); ++o) { - /* There is an address here. Is it ipv6? */ - if (strchr(addr,':')) + while (n != ports.end() && *n != *o) + n++; + if (n == ports.end()) { - /* Yes it is */ - in6_addr addy; - if (inet_pton(AF_INET6, addr, &addy) < 1) - { - delete[] servaddr; - return false; - } - - ((sockaddr_in6*)servaddr)->sin6_family = AF_INET6; - memcpy(&(((sockaddr_in6*)servaddr)->sin6_addr), &addy, sizeof(in6_addr)); - ((sockaddr_in6*)servaddr)->sin6_port = htons(port); - size = sizeof(sockaddr_in6); + this->Logs->Log("SOCKET",DEFAULT,"Port bindings slipped out of vector, aborting close!"); + break; } - else - { - /* No, its not */ - in_addr addy; - if (inet_pton(AF_INET, addr, &addy) < 1) - { - delete[] servaddr; - return false; - } - ((sockaddr_in*)servaddr)->sin_family = AF_INET; - ((sockaddr_in*)servaddr)->sin_addr = addy; - ((sockaddr_in*)servaddr)->sin_port = htons(port); - size = sizeof(sockaddr_in); - } + this->Logs->Log("SOCKET",DEFAULT, "Port binding %s was removed from the config file, closing.", + (**n).bind_desc.c_str()); + delete *n; + + // this keeps the iterator valid, pointing to the next element + n = ports.erase(n); } - else + + return bound; +} + +bool irc::sockets::aptosa(const std::string& addr, int port, irc::sockets::sockaddrs& sa) +{ + memset(&sa, 0, sizeof(sa)); + if (addr.empty() || addr.c_str()[0] == '*') { - if (port == -1) + if (ServerInstance->Config->WildcardIPv6) { - /* Port -1: Means UDP IPV4 port binding - Special case - * used by DNS engine. - */ - ((sockaddr_in*)servaddr)->sin_family = AF_INET; - ((sockaddr_in*)servaddr)->sin_addr.s_addr = htonl(INADDR_ANY); - ((sockaddr_in*)servaddr)->sin_port = 0; - size = sizeof(sockaddr_in); + sa.in6.sin6_family = AF_INET6; + sa.in6.sin6_port = htons(port); } else { - /* Theres no address here, default to ipv6 bind to all */ - ((sockaddr_in6*)servaddr)->sin6_family = AF_INET6; - memset(&(((sockaddr_in6*)servaddr)->sin6_addr), 0, sizeof(in6_addr)); - ((sockaddr_in6*)servaddr)->sin6_port = htons(port); - size = sizeof(sockaddr_in6); + sa.in4.sin_family = AF_INET; + sa.in4.sin_port = htons(port); } + return true; } -#else - /* If we aren't built with ipv6, the choice becomes simple */ - ((sockaddr_in*)servaddr)->sin_family = AF_INET; - if (*addr) + else if (inet_pton(AF_INET, addr.c_str(), &sa.in4.sin_addr) > 0) { - /* There is an address here. */ - in_addr addy; - if (inet_pton(AF_INET, addr, &addy) < 1) - { - delete[] servaddr; - return false; - } - ((sockaddr_in*)servaddr)->sin_addr = addy; + sa.in4.sin_family = AF_INET; + sa.in4.sin_port = htons(port); + return true; } - else + else if (inet_pton(AF_INET6, addr.c_str(), &sa.in6.sin6_addr) > 0) { - /* Bind ipv4 to all */ - ((sockaddr_in*)servaddr)->sin_addr.s_addr = htonl(INADDR_ANY); + sa.in6.sin6_family = AF_INET6; + sa.in6.sin6_port = htons(port); + return true; } - /* Bind ipv4 port number */ - ((sockaddr_in*)servaddr)->sin_port = htons(port); - size = sizeof(sockaddr_in); -#endif - ret = SE->Bind(sockfd, servaddr, size); - delete[] servaddr; + return false; +} - if (ret < 0) +int irc::sockets::sockaddrs::port() const +{ + if (sa.sa_family == AF_INET) + return ntohs(in4.sin_port); + if (sa.sa_family == AF_INET6) + return ntohs(in6.sin6_port); + return -1; +} + +std::string irc::sockets::sockaddrs::addr() const +{ + char addrv[INET6_ADDRSTRLEN+1]; + if (sa.sa_family == AF_INET) { - return false; + if (!inet_ntop(AF_INET, &in4.sin_addr, addrv, sizeof(addrv))) + return ""; + return addrv; } - else + else if (sa.sa_family == AF_INET6) { - if (dolisten) - { - if (SE->Listen(sockfd, Config->MaxConn) == -1) - { - this->Logs->Log("SOCKET",DEFAULT,"ERROR in listen(): %s",strerror(errno)); - return false; - } - else - { - this->Logs->Log("SOCKET",DEBUG,"New socket binding for %d with listen: %s:%d", sockfd, addr, port); - SE->NonBlocking(sockfd); - return true; - } - } - else - { - this->Logs->Log("SOCKET",DEBUG,"New socket binding for %d without listen: %s:%d", sockfd, addr, port); - return true; - } + if (!inet_ntop(AF_INET6, &in6.sin6_addr, addrv, sizeof(addrv))) + return ""; + return addrv; } + return ""; } -// Open a TCP Socket -int irc::sockets::OpenTCPSocket(char* addr, int socktype) +bool irc::sockets::satoap(const irc::sockets::sockaddrs& sa, std::string& addr, int &port) { - int sockfd; - int on = 1; - addr = addr; - struct linger linger = { 0, 0 }; -#ifdef IPV6 - if (strchr(addr,':') || (!*addr)) - sockfd = socket (PF_INET6, socktype, 0); + port = sa.port(); + addr = sa.addr(); + return !addr.empty(); +} + +std::string irc::sockets::sockaddrs::str() const +{ + char buffer[MAXBUF]; + if (sa.sa_family == AF_INET) + { + const uint8_t* bits = reinterpret_cast(&in4.sin_addr); + sprintf(buffer, "%d.%d.%d.%d:%u", bits[0], bits[1], bits[2], bits[3], ntohs(in4.sin_port)); + } + else if (sa.sa_family == AF_INET6) + { + buffer[0] = '['; + if (!inet_ntop(AF_INET6, &in6.sin6_addr, buffer+1, MAXBUF - 10)) + return ""; // should never happen, buffer is large enough + int len = strlen(buffer); + // no need for snprintf, buffer has at least 9 chars left, max short len = 5 + sprintf(buffer + len, "]:%u", ntohs(in6.sin6_port)); + } else - sockfd = socket (PF_INET, socktype, 0); - if (sockfd < 0) -#else - if ((sockfd = socket (PF_INET, socktype, 0)) < 0) -#endif + return ""; + return std::string(buffer); +} + +int irc::sockets::sockaddrs::sa_size() const +{ + if (sa.sa_family == AF_INET) + return sizeof(in4); + if (sa.sa_family == AF_INET6) + return sizeof(in6); + return 0; +} + +bool irc::sockets::sockaddrs::operator==(const irc::sockets::sockaddrs& other) const +{ + if (sa.sa_family != other.sa.sa_family) + return false; + if (sa.sa_family == AF_INET) + return (in4.sin_port == other.in4.sin_port) && (in4.sin_addr.s_addr == other.in4.sin_addr.s_addr); + if (sa.sa_family == AF_INET6) + return (in6.sin6_port == other.in6.sin6_port) && !memcmp(in6.sin6_addr.s6_addr, other.in6.sin6_addr.s6_addr, 16); + return !memcmp(this, &other, sizeof(*this)); +} + +static void sa2cidr(irc::sockets::cidr_mask& cidr, const irc::sockets::sockaddrs& sa, int range) +{ + const unsigned char* base; + unsigned char target_byte; + cidr.type = sa.sa.sa_family; + + memset(cidr.bits, 0, sizeof(cidr.bits)); + + if (cidr.type == AF_INET) { - return ERROR; + target_byte = sizeof(sa.in4.sin_addr); + base = (unsigned char*)&sa.in4.sin_addr; + if (range > 32) + range = 32; + } + else if (cidr.type == AF_INET6) + { + target_byte = sizeof(sa.in6.sin6_addr); + base = (unsigned char*)&sa.in6.sin6_addr; + if (range > 128) + range = 128; } else { - setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (char*)&on, sizeof(on)); - /* This is BSD compatible, setting l_onoff to 0 is *NOT* http://web.irc.org/mla/ircd-dev/msg02259.html */ - linger.l_onoff = 1; - linger.l_linger = 1; - setsockopt(sockfd, SOL_SOCKET, SO_LINGER, (char*)&linger,sizeof(linger)); - return (sockfd); + cidr.length = 0; + return; + } + cidr.length = range; + unsigned int border = range / 8; + unsigned int bitmask = (0xFF00 >> (range & 7)) & 0xFF; + for(unsigned int i=0; i < target_byte; i++) + { + if (i < border) + cidr.bits[i] = base[i]; + else if (i == border) + cidr.bits[i] = base[i] & bitmask; + else + return; } } -int InspIRCd::BindPorts(bool, int &ports_found, FailedPortList &failed_ports) +irc::sockets::cidr_mask::cidr_mask(const irc::sockets::sockaddrs& sa, int range) { - char configToken[MAXBUF], Addr[MAXBUF], Type[MAXBUF]; - int bound = 0; - bool started_with_nothing = (Config->ports.size() == 0); - std::vector > old_ports; + sa2cidr(*this, sa, range); +} - /* XXX: Make a copy of the old ip/port pairs here */ - for (std::vector::iterator o = Config->ports.begin(); o != Config->ports.end(); ++o) - old_ports.push_back(make_pair((*o)->GetIP(), (*o)->GetPort())); +irc::sockets::cidr_mask::cidr_mask(const std::string& mask) +{ + std::string::size_type bits_chars = mask.rfind('/'); + irc::sockets::sockaddrs sa; - for (int count = 0; count < Config->ConfValueEnum(Config->config_data, "bind"); count++) + if (bits_chars == std::string::npos) { - Config->ConfValue(Config->config_data, "bind", "port", count, configToken, MAXBUF); - Config->ConfValue(Config->config_data, "bind", "address", count, Addr, MAXBUF); - Config->ConfValue(Config->config_data, "bind", "type", count, Type, MAXBUF); - - if (strncmp(Addr, "::ffff:", 7) == 0) - this->Logs->Log("SOCKET",DEFAULT, "Using 4in6 (::ffff:) isn't recommended. You should bind IPv4 addresses directly instead."); - - if ((!*Type) || (!strcmp(Type,"clients"))) - { - irc::portparser portrange(configToken, false); - int portno = -1; - while (0 != (portno = portrange.GetToken())) - { - if (*Addr == '*') - *Addr = 0; - - bool skip = false; - for (std::vector::iterator n = Config->ports.begin(); n != Config->ports.end(); ++n) - { - if (((*n)->GetIP() == Addr) && ((*n)->GetPort() == portno)) - { - skip = true; - /* XXX: Here, erase from our copy of the list */ - for (std::vector >::iterator k = old_ports.begin(); k != old_ports.end(); ++k) - { - if ((k->first == Addr) && (k->second == portno)) - { - old_ports.erase(k); - break; - } - } - } - } - if (!skip) - { - ListenSocket* ll = new ListenSocket(this, portno, Addr); - if (ll->GetFd() > -1) - { - bound++; - Config->ports.push_back(ll); - } - else - { - failed_ports.push_back(std::make_pair(Addr, portno)); - } - ports_found++; - } - } - } + irc::sockets::aptosa(mask, 0, sa); + sa2cidr(*this, sa, 128); } - - /* XXX: Here, anything left in our copy list, close as removed */ - if (!started_with_nothing) + else { - for (size_t k = 0; k < old_ports.size(); ++k) - { - for (std::vector::iterator n = Config->ports.begin(); n != Config->ports.end(); ++n) - { - if (((*n)->GetIP() == old_ports[k].first) && ((*n)->GetPort() == old_ports[k].second)) - { - this->Logs->Log("SOCKET",DEFAULT,"Port binding %s:%d was removed from the config file, closing.", old_ports[k].first.c_str(), old_ports[k].second); - delete *n; - Config->ports.erase(n); - break; - } - } - } + int range = ConvToInt(mask.substr(bits_chars + 1)); + irc::sockets::aptosa(mask.substr(0, bits_chars), 0, sa); + sa2cidr(*this, sa, range); } +} - return bound; +std::string irc::sockets::cidr_mask::str() const +{ + irc::sockets::sockaddrs sa; + sa.sa.sa_family = type; + unsigned char* base; + int len; + if (type == AF_INET) + { + base = (unsigned char*)&sa.in4.sin_addr; + len = 4; + } + else if (type == AF_INET6) + { + base = (unsigned char*)&sa.in6.sin6_addr; + len = 16; + } + else + return ""; + memcpy(base, bits, len); + return sa.addr() + "/" + ConvToStr((int)length); } -const char* irc::sockets::insp_ntoa(insp_inaddr n) +bool irc::sockets::cidr_mask::operator==(const cidr_mask& other) const { - static char buf[1024]; - inet_ntop(AF_FAMILY, &n, buf, sizeof(buf)); - return buf; + return type == other.type && length == other.length && + 0 == memcmp(bits, other.bits, 16); } -int irc::sockets::insp_aton(const char* a, insp_inaddr* n) +bool irc::sockets::cidr_mask::operator<(const cidr_mask& other) const { - return inet_pton(AF_FAMILY, a, n); + if (type != other.type) + return type < other.type; + if (length != other.length) + return length < other.length; + return memcmp(bits, other.bits, 16) < 0; } +bool irc::sockets::cidr_mask::match(const irc::sockets::sockaddrs& addr) const +{ + if (addr.sa.sa_family != type) + return false; + irc::sockets::cidr_mask tmp(addr, length); + return tmp == *this; +}