/* * InspIRCd -- Internet Relay Chat Daemon * * 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 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 . */ #include "inspircd.h" #include "socket.h" #include "socketengine.h" using irc::sockets::sockaddrs; /** 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) { sockaddrs servaddr; int ret; if ((*addr == '*' || *addr == '\0') && port == -1) { /* Port -1: Means UDP IPV4 port binding - Special case * used by DNS engine. */ memset(&servaddr, 0, sizeof(servaddr)); servaddr.in4.sin_family = AF_INET; } else if (!irc::sockets::aptosa(addr, port, servaddr)) return false; ret = SE->Bind(sockfd, servaddr); if (ret < 0) { return false; } else { 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; } } } int InspIRCd::BindPorts(FailedPortList &failed_ports) { 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) { 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())) { irc::sockets::sockaddrs bindspec; if (!irc::sockets::aptosa(Addr, portno, bindspec)) continue; std::string bind_readable = bindspec.str(); bool skip = false; for (std::vector::iterator n = old_ports.begin(); n != old_ports.end(); ++n) { 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; } } if (!skip) { ListenSocket* ll = new ListenSocket(tag, bindspec); if (ll->GetFd() > -1) { bound++; ports.push_back(ll); } else { failed_ports.push_back(std::make_pair(bind_readable, strerror(errno))); delete ll; } } } } std::vector::iterator n = ports.begin(); for (std::vector::iterator o = old_ports.begin(); o != old_ports.end(); ++o) { while (n != ports.end() && *n != *o) n++; if (n == ports.end()) { this->Logs->Log("SOCKET",DEFAULT,"Port bindings slipped out of vector, aborting close!"); break; } 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); } 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 (ServerInstance->Config->WildcardIPv6) { sa.in6.sin6_family = AF_INET6; sa.in6.sin6_port = htons(port); } else { sa.in4.sin_family = AF_INET; sa.in4.sin_port = htons(port); } return true; } else if (inet_pton(AF_INET, addr.c_str(), &sa.in4.sin_addr) > 0) { sa.in4.sin_family = AF_INET; sa.in4.sin_port = htons(port); return true; } else if (inet_pton(AF_INET6, addr.c_str(), &sa.in6.sin6_addr) > 0) { sa.in6.sin6_family = AF_INET6; sa.in6.sin6_port = htons(port); return true; } return false; } 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) { if (!inet_ntop(AF_INET, &in4.sin_addr, addrv, sizeof(addrv))) return ""; return addrv; } else if (sa.sa_family == AF_INET6) { if (!inet_ntop(AF_INET6, &in6.sin6_addr, addrv, sizeof(addrv))) return ""; return addrv; } return ""; } bool irc::sockets::satoap(const irc::sockets::sockaddrs& sa, std::string& addr, int &port) { port = sa.port(); addr = sa.addr(); return !addr.empty(); } static const char all_zero[16] = {0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0 }; 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 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) { 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 { 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; } } irc::sockets::cidr_mask::cidr_mask(const irc::sockets::sockaddrs& sa, int range) { sa2cidr(*this, sa, range); } irc::sockets::cidr_mask::cidr_mask(const std::string& mask) { std::string::size_type bits_chars = mask.rfind('/'); irc::sockets::sockaddrs sa; if (bits_chars == std::string::npos) { irc::sockets::aptosa(mask, 0, sa); sa2cidr(*this, sa, 128); } else { int range = ConvToInt(mask.substr(bits_chars + 1)); irc::sockets::aptosa(mask.substr(0, bits_chars), 0, sa); sa2cidr(*this, sa, range); } } 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); } bool irc::sockets::cidr_mask::operator==(const cidr_mask& other) const { return type == other.type && length == other.length && 0 == memcmp(bits, other.bits, 16); } bool irc::sockets::cidr_mask::operator<(const cidr_mask& other) const { 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; }