X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fsocket.cpp;h=78b7f2de92214b85731ac6664081f589f26cbad2;hb=66dbd438f23a6beb06b0d44b9121deeb1e3f73bc;hp=68b93a4b4d29fbcf04b080446a0b36705c7eed26;hpb=2779810ff0d1b66f0fca1a62d6164d70f5c86d06;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/socket.cpp b/src/socket.cpp index 68b93a4b4..78b7f2de9 100644 --- a/src/socket.cpp +++ b/src/socket.cpp @@ -1,586 +1,451 @@ -/* +------------------------------------+ - * | Inspire Internet Relay Chat Daemon | - * +------------------------------------+ +/* + * InspIRCd -- Internet Relay Chat Daemon * - * InspIRCd: (C) 2002-2007 InspIRCd Development Team - * See: http://www.inspircd.org/wiki/index.php/Credits + * Copyright (C) 2019 linuxdaemon + * Copyright (C) 2014 Attila Molnar + * Copyright (C) 2013, 2017-2020 Sadie Powell + * Copyright (C) 2013 Daniel Vassdal + * Copyright (C) 2012 Robby + * Copyright (C) 2009-2011 Daniel De Graaf + * Copyright (C) 2009 Uli Schlachter + * Copyright (C) 2008 Thomas Stagner + * Copyright (C) 2007 John Brooks + * Copyright (C) 2007 Dennis Friis + * Copyright (C) 2006 Craig Edwards * - * 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 . */ + #include "inspircd.h" -#include -#include "configreader.h" -#include "socket.h" -#include "socketengine.h" -#include "wildcard.h" - -using namespace irc::sockets; - -/* Used when comparing CIDR masks for the modulus bits left over. - * A lot of ircd's seem to do this: - * ((-1) << (8 - (mask % 8))) - * But imho, it sucks in comparison to a nice neat lookup table. - */ -const unsigned char inverted_bits[8] = { 0x00, /* 00000000 - 0 bits - never actually used */ - 0x80, /* 10000000 - 1 bits */ - 0xC0, /* 11000000 - 2 bits */ - 0xE0, /* 11100000 - 3 bits */ - 0xF0, /* 11110000 - 4 bits */ - 0xF8, /* 11111000 - 5 bits */ - 0xFC, /* 11111100 - 6 bits */ - 0xFE /* 11111110 - 7 bits */ -}; - - -ListenSocket::ListenSocket(InspIRCd* Instance, int port, char* addr) : ServerInstance(Instance), desc("plaintext"), bind_addr(addr), bind_port(port) + +bool InspIRCd::BindPort(ConfigTag* tag, const irc::sockets::sockaddrs& sa, std::vector& old_ports) { - this->SetFd(OpenTCPSocket(addr)); - if (this->GetFd() > -1) + for (std::vector::iterator n = old_ports.begin(); n != old_ports.end(); ++n) { - 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); + if ((**n).bind_sa == sa) + { + // Replace tag, we know addr and port match, but other info (type, ssl) may not. + ServerInstance->Logs->Log("SOCKET", LOG_DEFAULT, "Replacing listener on %s from old tag at %s with new tag from %s", + sa.str().c_str(), (*n)->bind_tag->getTagLocation().c_str(), tag->getTagLocation().c_str()); + (*n)->bind_tag = tag; + (*n)->ResetIOHookProvider(); + + old_ports.erase(n); + return true; + } } -} -ListenSocket::~ListenSocket() -{ - if (this->GetFd() > -1) + ListenSocket* ll = new ListenSocket(tag, sa); + if (!ll->HasFd()) { - ServerInstance->SE->DelFd(this); - ServerInstance->Log(DEBUG,"Shut down listener on fd %d", this->fd); - if (shutdown(this->fd, 2) || close(this->fd)) - ServerInstance->Log(DEBUG,"Failed to cancel listener: %s", strerror(errno)); - this->fd = -1; + ServerInstance->Logs->Log("SOCKET", LOG_DEFAULT, "Failed to listen on %s from tag at %s: %s", + sa.str().c_str(), tag->getTagLocation().c_str(), strerror(errno)); + delete ll; + return false; } + + ServerInstance->Logs->Log("SOCKET", LOG_DEFAULT, "Added a listener on %s from tag at %s", sa.str().c_str(), tag->getTagLocation().c_str()); + ports.push_back(ll); + return true; } -void ListenSocket::HandleEvent(EventType et, int errornum) +size_t InspIRCd::BindPorts(FailedPortList& failed_ports) { - socklen_t uslen, length; // length of our port number - int incomingSockfd, in_port; - int clients; + size_t bound = 0; + std::vector old_ports(ports.begin(), ports.end()); -#ifdef IPV6 - if (this->family == AF_INET6) + ConfigTagList tags = ServerInstance->Config->ConfTags("bind"); + for (ConfigIter i = tags.first; i != tags.second; ++i) { - uslen = sizeof(sockaddr_in6); - length = sizeof(sockaddr_in6); - } - else -#endif - { - uslen = sizeof(sockaddr_in); - length = sizeof(sockaddr_in); - } + ConfigTag* tag = i->second; - /* - * This loop may make you wonder 'why' - simple reason. If we just sit here accept()ing until the - * metaphorical cows come home, then we could very well end up with unresponsiveness in a ddos style - * situation, which is not desirable (to put it mildly!). This will mean we'll stop accepting and get - * on with our lives after accepting enough clients to sink a metaphorical battleship. :) -- w00t - */ - for (clients = 0; clients < ServerInstance->Config->MaxConn; clients++) - { - sockaddr* sock_us = new sockaddr[2]; // our port number - sockaddr* client = new sockaddr[2]; - - incomingSockfd = _accept (this->GetFd(), (sockaddr*)client, &length); - - if ((incomingSockfd > -1) && (!_getsockname(incomingSockfd, sock_us, &uslen))) + // Are we creating a TCP/IP listener? + const std::string address = tag->getString("address"); + const std::string portlist = tag->getString("port"); + if (!address.empty() || !portlist.empty()) { - char buf[MAXBUF]; -#ifdef IPV6 - if (this->family == AF_INET6) + // InspIRCd supports IPv4 and IPv6 natively; no 4in6 required. + if (strncasecmp(address.c_str(), "::ffff:", 7) == 0) + this->Logs->Log("SOCKET", LOG_DEFAULT, "Using 4in6 (::ffff:) isn't recommended. You should bind IPv4 addresses directly instead."); + + // A TCP listener with no ports is not very useful. + if (portlist.empty()) + this->Logs->Log("SOCKET", LOG_DEFAULT, "TCP listener on %s at %s has no ports specified!", + address.empty() ? "*" : address.c_str(), tag->getTagLocation().c_str()); + + irc::portparser portrange(portlist, false); + for (int port; (port = portrange.GetToken()); ) { - inet_ntop(AF_INET6, &((const sockaddr_in6*)client)->sin6_addr, buf, sizeof(buf)); - in_port = ntohs(((sockaddr_in6*)sock_us)->sin6_port); + irc::sockets::sockaddrs bindspec; + if (!irc::sockets::aptosa(address, port, bindspec)) + continue; + + if (!BindPort(tag, bindspec, old_ports)) + failed_ports.push_back(FailedPort(errno, bindspec, tag)); + else + bound++; } - else -#endif + continue; + } + +#ifndef _WIN32 + // Are we creating a UNIX listener? + const std::string path = tag->getString("path"); + if (!path.empty()) + { + // Expand the path relative to the config directory. + const std::string fullpath = ServerInstance->Config->Paths.PrependData(path); + + // UNIX socket paths are length limited to less than PATH_MAX. + irc::sockets::sockaddrs bindspec; + if (fullpath.length() > std::min(ServerInstance->Config->Limits.MaxHost, sizeof(bindspec.un.sun_path) - 1)) { - inet_ntop(AF_INET, &((const sockaddr_in*)client)->sin_addr, buf, sizeof(buf)); - in_port = ntohs(((sockaddr_in*)sock_us)->sin_port); + this->Logs->Log("SOCKET", LOG_DEFAULT, "UNIX listener on %s at %s specified a path that is too long!", + fullpath.c_str(), tag->getTagLocation().c_str()); + continue; } - NonBlocking(incomingSockfd); - if (ServerInstance->Config->GetIOHook(in_port)) + // Check for characters which are problematic in the IRC message format. + if (fullpath.find_first_of("\n\r\t!@: ") != std::string::npos) { - try - { - ServerInstance->Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, buf, in_port); - } - catch (CoreException& modexcept) - { - ServerInstance->Log(DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason()); - } + this->Logs->Log("SOCKET", LOG_DEFAULT, "UNIX listener on %s at %s specified a path containing invalid characters!", + fullpath.c_str(), tag->getTagLocation().c_str()); + continue; } - ServerInstance->stats->statsAccept++; - userrec::AddClient(ServerInstance, incomingSockfd, in_port, false, this->family, client); - } - else - { - /* - * bail, bail, bail! if we get here, accept failed, meaning something is hardcore wrong. - * cut our losses and don't try soak up any more clients during this loop iteration. -- w00t - */ - shutdown(incomingSockfd,2); - close(incomingSockfd); - ServerInstance->stats->statsRefused++; - return; - } - /* Woots metaphorical comments confuse the metaphor out of me. */ - delete[] client; - delete[] sock_us; + irc::sockets::untosa(fullpath, bindspec); + if (!BindPort(tag, bindspec, old_ports)) + failed_ports.push_back(FailedPort(errno, bindspec, tag)); + else + bound++; + } +#endif } -} -/* Match raw bytes using CIDR bit matching, used by higher level MatchCIDR() */ -bool irc::sockets::MatchCIDRBits(unsigned char* address, unsigned char* mask, unsigned int mask_bits) -{ - unsigned int modulus = mask_bits % 8; /* Number of whole bytes in the mask */ - unsigned int divisor = mask_bits / 8; /* Remaining bits in the mask after whole bytes are dealt with */ - - /* First compare the whole bytes, if they dont match, return false */ - if (memcmp(address, mask, divisor)) - return false; - - /* Now if there are any remainder bits, we compare them with logic AND */ - if (modulus) - if ((address[divisor] & inverted_bits[modulus]) != (mask[divisor] & inverted_bits[modulus])) - /* If they dont match, return false */ - return false; - - /* The address matches the mask, to mask_bits bits of mask */ - return true; -} - -/* Match CIDR, but dont attempt to match() against leading *!*@ sections */ -bool irc::sockets::MatchCIDR(const char* address, const char* cidr_mask) -{ - return MatchCIDR(address, cidr_mask, false); -} - -/* Match CIDR strings, e.g. 127.0.0.1 to 127.0.0.0/8 or 3ffe:1:5:6::8 to 3ffe:1::0/32 - * If you have a lot of hosts to match, youre probably better off building your mask once - * and then using the lower level MatchCIDRBits directly. - * - * This will also attempt to match any leading usernames or nicknames on the mask, using - * match(), when match_with_username is true. - */ -bool irc::sockets::MatchCIDR(const char* address, const char* cidr_mask, bool match_with_username) -{ - unsigned char addr_raw[16]; - unsigned char mask_raw[16]; - unsigned int bits = 0; - char* mask = NULL; - - /* The caller is trying to match ident@/bits. - * Chop off the ident@ portion, use match() on it - * seperately. - */ - if (match_with_username) + std::vector::iterator n = ports.begin(); + for (std::vector::iterator o = old_ports.begin(); o != old_ports.end(); ++o) { - /* Duplicate the strings, and try to find the position - * of the @ symbol in each */ - char* address_dupe = strdup(address); - char* cidr_dupe = strdup(cidr_mask); - - /* Use strchr not strrchr, because its going to be nearer to the left */ - char* username_mask_pos = strrchr(cidr_dupe, '@'); - char* username_addr_pos = strrchr(address_dupe, '@'); - - /* Both strings have an @ symbol in them */ - if (username_mask_pos && username_addr_pos) - { - /* Zero out the location of the @ symbol */ - *username_mask_pos = *username_addr_pos = 0; - - /* Try and match() the strings before the @ - * symbols, and recursively call MatchCIDR without - * username matching enabled to match the host part. - */ - bool result = (match(address_dupe, cidr_dupe) && MatchCIDR(username_addr_pos + 1, username_mask_pos + 1, false)); - - /* Free the stuff we created */ - free(address_dupe); - free(cidr_dupe); - - /* Return a result */ - return result; - } - else + while (n != ports.end() && *n != *o) + n++; + if (n == ports.end()) { - /* One or both didnt have an @ in, - * just match as CIDR - */ - free(address_dupe); - free(cidr_dupe); - mask = strdup(cidr_mask); + this->Logs->Log("SOCKET", LOG_DEFAULT, "Port bindings slipped out of vector, aborting close!"); + break; } - } - else - { - /* Make a copy of the cidr mask string, - * we're going to change it - */ - mask = strdup(cidr_mask); - } - - in_addr address_in4; - in_addr mask_in4; - - /* Use strrchr for this, its nearer to the right */ - char* bits_chars = strrchr(mask,'/'); + this->Logs->Log("SOCKET", LOG_DEFAULT, "Port binding %s was removed from the config file, closing.", + (**n).bind_sa.str().c_str()); + delete *n; - if (bits_chars) - { - bits = atoi(bits_chars + 1); - *bits_chars = 0; - } - else - { - /* No 'number of bits' field! */ - free(mask); - return false; + // this keeps the iterator valid, pointing to the next element + n = ports.erase(n); } -#ifdef SUPPORT_IP6LINKS - in6_addr address_in6; - in6_addr mask_in6; + return bound; +} - if (inet_pton(AF_INET6, address, &address_in6) > 0) +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 (inet_pton(AF_INET6, mask, &mask_in6) > 0) + if (ServerInstance->Config->WildcardIPv6) { - memcpy(&addr_raw, &address_in6.s6_addr, 16); - memcpy(&mask_raw, &mask_in6.s6_addr, 16); - - if (bits > 128) - bits = 128; + sa.in6.sin6_family = AF_INET6; + sa.in6.sin6_port = htons(port); } else { - /* The address was valid ipv6, but the mask - * that goes with it wasnt. - */ - free(mask); - return false; + sa.in4.sin_family = AF_INET; + sa.in4.sin_port = htons(port); } + return true; } - else -#endif - if (inet_pton(AF_INET, address, &address_in4) > 0) + else if (inet_pton(AF_INET, addr.c_str(), &sa.in4.sin_addr) > 0) { - if (inet_pton(AF_INET, mask, &mask_in4) > 0) - { - memcpy(&addr_raw, &address_in4.s_addr, 4); - memcpy(&mask_raw, &mask_in4.s_addr, 4); - - if (bits > 32) - bits = 32; - } - else - { - /* The address was valid ipv4, - * but the mask that went with it wasnt. - */ - free(mask); - return false; - } + 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) { - /* The address was neither ipv4 or ipv6 */ - free(mask); - return false; + sa.in6.sin6_family = AF_INET6; + sa.in6.sin6_port = htons(port); + return true; } + return false; +} - /* Low-level-match the bits in the raw data */ - free(mask); - return MatchCIDRBits(addr_raw, mask_raw, bits); +bool irc::sockets::untosa(const std::string& path, irc::sockets::sockaddrs& sa) +{ + memset(&sa, 0, sizeof(sa)); + if (path.length() >= sizeof(sa.un.sun_path)) + return false; + + sa.un.sun_family = AF_UNIX; + memcpy(&sa.un.sun_path, path.c_str(), path.length() + 1); + return true; } -void irc::sockets::Blocking(int s) +bool irc::sockets::isunix(const std::string& file) { -#ifndef WIN32 - int flags = fcntl(s, F_GETFL, 0); - fcntl(s, F_SETFL, flags ^ O_NONBLOCK); -#else - unsigned long opt = 0; - ioctlsocket(s, FIONBIO, &opt); +#ifndef _WIN32 + struct stat sb; + if (stat(file.c_str(), &sb) == 0 && S_ISSOCK(sb.st_mode)) + return true; #endif + return false; } -void irc::sockets::NonBlocking(int s) + +int irc::sockets::sockaddrs::family() const { -#ifndef WIN32 - int flags = fcntl(s, F_GETFL, 0); - fcntl(s, F_SETFL, flags | O_NONBLOCK); -#else - unsigned long opt = 1; - ioctlsocket(s, FIONBIO, &opt); -#endif + return sa.sa_family; } -/** 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, char* addr, bool dolisten) +int irc::sockets::sockaddrs::port() const { - /* We allocate 2 of these, because sockaddr_in6 is larger than sockaddr (ugh, hax) */ - sockaddr* server = new sockaddr[2]; - memset(server,0,sizeof(sockaddr)*2); + switch (family()) + { + case AF_INET: + return ntohs(in4.sin_port); - int ret, size; + case AF_INET6: + return ntohs(in6.sin6_port); - if (*addr == '*') - *addr = 0; + case AF_UNIX: + return 0; + } + + // If we have reached this point then we have encountered a bug. + ServerInstance->Logs->Log("SOCKET", LOG_DEBUG, "BUG: irc::sockets::sockaddrs::port(): socket type %d is unknown!", family()); + return 0; +} -#ifdef IPV6 - if (*addr) +std::string irc::sockets::sockaddrs::addr() const +{ + switch (family()) { - /* There is an address here. Is it ipv6? */ - if (strchr(addr,':')) - { - /* Yes it is */ - in6_addr addy; - if (inet_pton(AF_INET6, addr, &addy) < 1) - { - delete[] server; - return false; - } + case AF_INET: + char ip4addr[INET_ADDRSTRLEN]; + if (!inet_ntop(AF_INET, (void*)&in4.sin_addr, ip4addr, sizeof(ip4addr))) + return "0.0.0.0"; + return ip4addr; + + case AF_INET6: + char ip6addr[INET6_ADDRSTRLEN]; + if (!inet_ntop(AF_INET6, (void*)&in6.sin6_addr, ip6addr, sizeof(ip6addr))) + return "0:0:0:0:0:0:0:0"; + return ip6addr; + + case AF_UNIX: + return un.sun_path; + } - ((sockaddr_in6*)server)->sin6_family = AF_INET6; - memcpy(&(((sockaddr_in6*)server)->sin6_addr), &addy, sizeof(in6_addr)); - ((sockaddr_in6*)server)->sin6_port = htons(port); - size = sizeof(sockaddr_in6); - } - else - { - /* No, its not */ - in_addr addy; - if (inet_pton(AF_INET, addr, &addy) < 1) - { - delete[] server; - return false; - } + // If we have reached this point then we have encountered a bug. + ServerInstance->Logs->Log("SOCKET", LOG_DEBUG, "BUG: irc::sockets::sockaddrs::addr(): socket type %d is unknown!", family()); + return ""; +} - ((sockaddr_in*)server)->sin_family = AF_INET; - ((sockaddr_in*)server)->sin_addr = addy; - ((sockaddr_in*)server)->sin_port = htons(port); - size = sizeof(sockaddr_in); - } - } - else +std::string irc::sockets::sockaddrs::str() const +{ + switch (family()) { - if (port == -1) - { - /* Port -1: Means UDP IPV4 port binding - Special case - * used by DNS engine. - */ - ((sockaddr_in*)server)->sin_family = AF_INET; - ((sockaddr_in*)server)->sin_addr.s_addr = htonl(INADDR_ANY); - ((sockaddr_in*)server)->sin_port = 0; - size = sizeof(sockaddr_in); - } - else - { - /* Theres no address here, default to ipv6 bind to all */ - ((sockaddr_in6*)server)->sin6_family = AF_INET6; - memset(&(((sockaddr_in6*)server)->sin6_addr), 0, sizeof(in6_addr)); - ((sockaddr_in6*)server)->sin6_port = htons(port); - size = sizeof(sockaddr_in6); - } + case AF_INET: + char ip4addr[INET_ADDRSTRLEN]; + if (!inet_ntop(AF_INET, (void*)&in4.sin_addr, ip4addr, sizeof(ip4addr))) + strcpy(ip4addr, "0.0.0.0"); + return InspIRCd::Format("%s:%u", ip4addr, ntohs(in4.sin_port)); + + case AF_INET6: + char ip6addr[INET6_ADDRSTRLEN]; + if (!inet_ntop(AF_INET6, (void*)&in6.sin6_addr, ip6addr, sizeof(ip6addr))) + strcpy(ip6addr, "0:0:0:0:0:0:0:0"); + return InspIRCd::Format("[%s]:%u", ip6addr, ntohs(in6.sin6_port)); + + case AF_UNIX: + return un.sun_path; } -#else - /* If we aren't built with ipv6, the choice becomes simple */ - ((sockaddr_in*)server)->sin_family = AF_INET; - if (*addr) + + // If we have reached this point then we have encountered a bug. + ServerInstance->Logs->Log("SOCKET", LOG_DEBUG, "BUG: irc::sockets::sockaddrs::str(): socket type %d is unknown!", family()); + return ""; +} + +socklen_t irc::sockets::sockaddrs::sa_size() const +{ + switch (family()) { - /* There is an address here. */ - in_addr addy; - if (inet_pton(AF_INET, addr, &addy) < 1) - { - delete[] server; - return false; - } - ((sockaddr_in*)server)->sin_addr = addy; + case AF_INET: + return sizeof(in4); + + case AF_INET6: + return sizeof(in6); + + case AF_UNIX: + return sizeof(un); } - else + + // If we have reached this point then we have encountered a bug. + ServerInstance->Logs->Log("SOCKET", LOG_DEBUG, "BUG: irc::sockets::sockaddrs::sa_size(): socket type %d is unknown!", family()); + return 0; +} + +bool irc::sockets::sockaddrs::operator==(const irc::sockets::sockaddrs& other) const +{ + if (family() != other.family()) + return false; + + switch (family()) { - /* Bind ipv4 to all */ - ((sockaddr_in*)server)->sin_addr.s_addr = htonl(INADDR_ANY); + case AF_INET: + return (in4.sin_port == other.in4.sin_port) && (in4.sin_addr.s_addr == other.in4.sin_addr.s_addr); + + case AF_INET6: + return (in6.sin6_port == other.in6.sin6_port) && !memcmp(in6.sin6_addr.s6_addr, other.in6.sin6_addr.s6_addr, 16); + + case AF_UNIX: + return !strcmp(un.sun_path, other.un.sun_path); } - /* Bind ipv4 port number */ - ((sockaddr_in*)server)->sin_port = htons(port); - size = sizeof(sockaddr_in); -#endif - ret = bind(sockfd, server, size); - delete[] server; - if (ret < 0) + // If we have reached this point then we have encountered a bug. + ServerInstance->Logs->Log("SOCKET", LOG_DEBUG, "BUG: irc::sockets::sockaddrs::operator==(): socket type %d is unknown!", family()); + return !memcmp(this, &other, sizeof(*this)); +} + +static void sa2cidr(irc::sockets::cidr_mask& cidr, const irc::sockets::sockaddrs& sa, unsigned char range) +{ + const unsigned char* base; + unsigned char target_byte; + + memset(cidr.bits, 0, sizeof(cidr.bits)); + + cidr.type = sa.family(); + switch (cidr.type) { - return false; + case AF_UNIX: + // XXX: UNIX sockets don't support CIDR. This fix is non-ideal but I can't + // really think of another way to handle it. + cidr.length = 0; + return; + + case AF_INET: + cidr.length = range > 32 ? 32 : range; + target_byte = sizeof(sa.in4.sin_addr); + base = (unsigned char*)&sa.in4.sin_addr; + break; + + case AF_INET6: + cidr.length = range > 128 ? 128 : range; + target_byte = sizeof(sa.in6.sin6_addr); + base = (unsigned char*)&sa.in6.sin6_addr; + break; + + default: + // If we have reached this point then we have encountered a bug. + ServerInstance->Logs->Log("SOCKET", LOG_DEBUG, "BUG: sa2cidr(): socket type %d is unknown!", cidr.type); + cidr.length = 0; + return; } - else + + unsigned int border = cidr.length / 8; + unsigned int bitmask = (0xFF00 >> (range & 7)) & 0xFF; + for(unsigned int i=0; i < target_byte; i++) { - if (dolisten) - { - if (listen(sockfd, Config->MaxConn) == -1) - { - this->Log(DEFAULT,"ERROR in listen(): %s",strerror(errno)); - return false; - } - else - { - this->Log(DEBUG,"New socket binding for %d with listen: %s:%d", sockfd, addr, port); - NonBlocking(sockfd); - return true; - } - } + if (i < border) + cidr.bits[i] = base[i]; + else if (i == border) + cidr.bits[i] = base[i] & bitmask; else - { - this->Log(DEBUG,"New socket binding for %d without listen: %s:%d", sockfd, addr, port); - return true; - } + return; } } -// Open a TCP Socket -int irc::sockets::OpenTCPSocket(char* addr, int socktype) +irc::sockets::cidr_mask::cidr_mask(const irc::sockets::sockaddrs& sa, unsigned char range) { - int sockfd; - int on = 1; - struct linger linger = { 0 }; -#ifdef IPV6 - if (strchr(addr,':') || (!*addr)) - sockfd = socket (PF_INET6, socktype, 0); - else - sockfd = socket (PF_INET, socktype, 0); - if (sockfd < 0) -#else - if ((sockfd = socket (PF_INET, socktype, 0)) < 0) -#endif + 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) { - return ERROR; + irc::sockets::aptosa(mask, 0, sa); + sa2cidr(*this, sa, 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); + unsigned char range = ConvToNum(mask.substr(bits_chars + 1)); + irc::sockets::aptosa(mask.substr(0, bits_chars), 0, sa); + sa2cidr(*this, sa, range); } } -/* XXX: Probably belongs in class InspIRCd */ -int InspIRCd::BindPorts(bool bail, int &ports_found, FailedPortList &failed_ports) +std::string irc::sockets::cidr_mask::str() const { - char configToken[MAXBUF], Addr[MAXBUF], Type[MAXBUF]; - int bound = 0; - bool started_with_nothing = (Config->ports.size() == 0); - std::vector > old_ports; - - /* 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())); - - for (int count = 0; count < Config->ConfValueEnum(Config->config_data, "bind"); count++) - { - 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 ((!*Type) || (!strcmp(Type,"clients"))) - { - irc::portparser portrange(configToken, false); - int portno = -1; - while ((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::sockaddrs sa; + sa.sa.sa_family = type; - /* XXX: Here, anything left in our copy list, close as removed */ - if (!started_with_nothing) + unsigned char* base; + size_t len; + switch (type) { - 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->Log(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; - } - } - } + case AF_INET: + base = (unsigned char*)&sa.in4.sin_addr; + len = 4; + break; + + case AF_INET6: + base = (unsigned char*)&sa.in6.sin6_addr; + len = 16; + break; + + case AF_UNIX: + return sa.un.sun_path; + + default: + // If we have reached this point then we have encountered a bug. + ServerInstance->Logs->Log("SOCKET", LOG_DEBUG, "BUG: irc::sockets::cidr_mask::str(): socket type %d is unknown!", type); + return ""; } - return bound; + 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.family() != type) + return false; + irc::sockets::cidr_mask tmp(addr, length); + return tmp == *this; +}