-/* +------------------------------------+
- * | Inspire Internet Relay Chat Daemon |
- * +------------------------------------+
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
*
- * Inspire is copyright (C) 2002-2004 ChatSpike-Dev.
- * E-mail:
- * <brain@chatspike.net>
- * <Craig@chatspike.net>
- *
- * Written by Craig Edwards, Craig McLure, and others.
- * This program is free but copyrighted software; see
- * the file COPYING for details.
+ * Copyright (C) 2019 linuxdaemon <linuxdaemon.irc@gmail.com>
+ * Copyright (C) 2014 Attila Molnar <attilamolnar@hush.com>
+ * Copyright (C) 2013, 2017-2020 Sadie Powell <sadie@witchery.services>
+ * Copyright (C) 2013 Daniel Vassdal <shutter@canternet.org>
+ * Copyright (C) 2012 Robby <robby@chatbelgie.be>
+ * Copyright (C) 2009-2011 Daniel De Graaf <danieldg@inspircd.org>
+ * Copyright (C) 2009 Uli Schlachter <psychon@inspircd.org>
+ * Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
+ * Copyright (C) 2007 John Brooks <special@inspircd.org>
+ * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
+ * Copyright (C) 2006 Craig Edwards <brain@inspircd.org>
*
- * ---------------------------------------------------
+ * 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 <http://www.gnu.org/licenses/>.
*/
-using namespace std;
-
-#include "inspircd_config.h"
-#include <sys/time.h>
-#include <sys/resource.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <string>
-#include <unistd.h>
-#include <fcntl.h>
-#include <poll.h>
-#include <sstream>
-#include <iostream>
-#include <fstream>
-#include "socket.h"
+
#include "inspircd.h"
-#include "inspircd_io.h"
-#include "inspstring.h"
-#include "helperfuncs.h"
-#include "socketengine.h"
+bool InspIRCd::BindPort(ConfigTag* tag, const irc::sockets::sockaddrs& sa, std::vector<ListenSocket*>& old_ports)
+{
+ for (std::vector<ListenSocket*>::iterator n = old_ports.begin(); n != old_ports.end(); ++n)
+ {
+ 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();
-extern InspIRCd* ServerInstance;
-extern time_t TIME;
+ old_ports.erase(n);
+ return true;
+ }
+ }
-InspSocket* socket_ref[MAX_DESCRIPTORS];
+ ListenSocket* ll = new ListenSocket(tag, sa);
+ if (!ll->HasFd())
+ {
+ 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;
+ }
-InspSocket::InspSocket()
-{
- this->state = I_DISCONNECTED;
+ 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;
}
-InspSocket::InspSocket(int newfd, char* ip)
+size_t InspIRCd::BindPorts(FailedPortList& failed_ports)
{
- this->fd = newfd;
- this->state = I_CONNECTED;
- this->IP = ip;
- ServerInstance->SE->AddFd(this->fd,true,X_ESTAB_MODULE);
- socket_ref[this->fd] = this;
-}
+ size_t bound = 0;
+ std::vector<ListenSocket*> old_ports(ports.begin(), ports.end());
-InspSocket::InspSocket(std::string host, int port, bool listening, unsigned long maxtime)
-{
- if (listening) {
- if ((this->fd = OpenTCPSocket()) == ERROR)
+ ConfigTagList tags = ServerInstance->Config->ConfTags("bind");
+ for (ConfigIter i = tags.first; i != tags.second; ++i)
+ {
+ ConfigTag* tag = i->second;
+
+ // 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())
{
- this->fd = -1;
- this->state = I_ERROR;
- this->OnError(I_ERR_SOCKET);
- log(DEBUG,"OpenTCPSocket() error");
- return;
+ // 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()); )
+ {
+ 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++;
+ }
+ continue;
}
- else
+
+#ifndef _WIN32
+ // Are we creating a UNIX listener?
+ const std::string path = tag->getString("path");
+ if (!path.empty())
{
- if (BindSocket(this->fd,this->client,this->server,port,(char*)host.c_str()) == ERROR)
+ // 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))
{
- this->Close();
- this->fd = -1;
- this->state = I_ERROR;
- this->OnError(I_ERR_BIND);
- log(DEBUG,"BindSocket() error %s",strerror(errno));
- return;
+ 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;
}
- else
+
+ // Check for characters which are problematic in the IRC message format.
+ if (fullpath.find_first_of("\n\r\t!@: ") != std::string::npos)
{
- this->state = I_LISTENING;
- ServerInstance->SE->AddFd(this->fd,true,X_ESTAB_MODULE);
- socket_ref[this->fd] = this;
- log(DEBUG,"New socket now in I_LISTENING state");
- return;
+ 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;
}
- }
- } else {
- char* ip;
- this->host = host;
- hostent* hoste = gethostbyname(host.c_str());
- if (!hoste) {
- ip = (char*)host.c_str();
- } else {
- struct in_addr* ia = (in_addr*)hoste->h_addr;
- ip = inet_ntoa(*ia);
- }
- this->IP = ip;
+ irc::sockets::untosa(fullpath, bindspec);
+ if (!BindPort(tag, bindspec, old_ports))
+ failed_ports.push_back(FailedPort(errno, bindspec, tag));
+ else
+ bound++;
+ }
+#endif
+ }
- timeout_end = time(NULL)+maxtime;
- timeout = false;
- if ((this->fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
+ std::vector<ListenSocket*>::iterator n = ports.begin();
+ for (std::vector<ListenSocket*>::iterator o = old_ports.begin(); o != old_ports.end(); ++o)
+ {
+ while (n != ports.end() && *n != *o)
+ n++;
+ if (n == ports.end())
{
- this->state = I_ERROR;
- this->OnError(I_ERR_SOCKET);
- return;
+ this->Logs->Log("SOCKET", LOG_DEFAULT, "Port bindings slipped out of vector, aborting close!");
+ break;
}
- this->port = port;
- inet_aton(ip,&addy);
- addr.sin_family = AF_INET;
- addr.sin_addr = addy;
- addr.sin_port = htons(this->port);
-
- int flags;
- flags = fcntl(this->fd, F_GETFL, 0);
- fcntl(this->fd, F_SETFL, flags | O_NONBLOCK);
-
- if(connect(this->fd, (sockaddr*)&this->addr,sizeof(this->addr)) == -1)
- {
- if (errno != EINPROGRESS)
- {
- this->Close();
- this->OnError(I_ERR_CONNECT);
- this->state = I_ERROR;
- return;
- }
- }
- this->state = I_CONNECTING;
- ServerInstance->SE->AddFd(this->fd,false,X_ESTAB_MODULE);
- socket_ref[this->fd] = this;
- return;
+
+ this->Logs->Log("SOCKET", LOG_DEFAULT, "Port binding %s was removed from the config file, closing.",
+ (**n).bind_sa.str().c_str());
+ delete *n;
+
+ // this keeps the iterator valid, pointing to the next element
+ n = ports.erase(n);
}
+
+ return bound;
}
-void InspSocket::Close()
+bool irc::sockets::aptosa(const std::string& addr, int port, irc::sockets::sockaddrs& sa)
{
- if (this->fd != -1)
+ 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)
{
- this->OnClose();
- shutdown(this->fd,2);
- close(this->fd);
- socket_ref[this->fd] = NULL;
- this->fd = -1;
+ sa.in6.sin6_family = AF_INET6;
+ sa.in6.sin6_port = htons(port);
+ return true;
}
+ return false;
}
-std::string InspSocket::GetIP()
+bool irc::sockets::untosa(const std::string& path, irc::sockets::sockaddrs& sa)
{
- return this->IP;
+ 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;
}
-char* InspSocket::Read()
+bool irc::sockets::isunix(const std::string& file)
{
- int n = recv(this->fd,this->ibuf,sizeof(this->ibuf),0);
- if (n > 0)
+#ifndef _WIN32
+ struct stat sb;
+ if (stat(file.c_str(), &sb) == 0 && S_ISSOCK(sb.st_mode))
+ return true;
+#endif
+ return false;
+}
+
+
+int irc::sockets::sockaddrs::family() const
+{
+ return sa.sa_family;
+}
+
+int irc::sockets::sockaddrs::port() const
+{
+ switch (family())
{
- ibuf[n] = 0;
- return ibuf;
+ case AF_INET:
+ return ntohs(in4.sin_port);
+
+ case AF_INET6:
+ return ntohs(in6.sin6_port);
+
+ case AF_UNIX:
+ return 0;
}
- else
+
+ // 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;
+}
+
+std::string irc::sockets::sockaddrs::addr() const
+{
+ switch (family())
{
- if (n == EAGAIN)
- {
- return "";
- }
- else
- {
- log(DEBUG,"EOF or error on socket");
- return NULL;
- }
+ 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;
}
+
+ // 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 "<unknown>";
}
-// There are two possible outcomes to this function.
-// It will either write all of the data, or an undefined amount.
-// If an undefined amount is written the connection has failed
-// and should be aborted.
-int InspSocket::Write(std::string data)
+std::string irc::sockets::sockaddrs::str() const
{
- this->Buffer = this->Buffer + data;
- this->FlushWriteBuffer();
- return data.length();
+ switch (family())
+ {
+ 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;
+ }
+
+ // 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 "<unknown>";
}
-void InspSocket::FlushWriteBuffer()
+socklen_t irc::sockets::sockaddrs::sa_size() const
{
- int result = 0;
- if (this->Buffer.length())
+ switch (family())
{
- result = send(this->fd,this->Buffer.c_str(),this->Buffer.length(),0);
- if (result > 0)
- {
- /* If we wrote some, advance the buffer forwards */
- char* n = (char*)this->Buffer.c_str();
- n += result;
- this->Buffer = n;
- }
+ case AF_INET:
+ return sizeof(in4);
+
+ case AF_INET6:
+ return sizeof(in6);
+
+ case AF_UNIX:
+ return sizeof(un);
}
+
+ // 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 InspSocket::Timeout(time_t current)
+bool irc::sockets::sockaddrs::operator==(const irc::sockets::sockaddrs& other) const
{
- if ((this->state == I_CONNECTING) && (current > timeout_end))
+ if (family() != other.family())
+ return false;
+
+ switch (family())
{
- // for non-listening sockets, the timeout can occur
- // which causes termination of the connection after
- // the given number of seconds without a successful
- // connection.
- this->OnTimeout();
- this->OnError(I_ERR_TIMEOUT);
- timeout = true;
- this->state = I_ERROR;
- return true;
+ 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);
}
- if (this->Buffer.length())
- this->FlushWriteBuffer();
- return false;
+
+ // 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));
}
-bool InspSocket::Poll()
+static void sa2cidr(irc::sockets::cidr_mask& cidr, const irc::sockets::sockaddrs& sa, unsigned char range)
{
- int incoming = -1;
-
- switch (this->state)
+ const unsigned char* base;
+ unsigned char target_byte;
+
+ memset(cidr.bits, 0, sizeof(cidr.bits));
+
+ cidr.type = sa.family();
+ switch (cidr.type)
{
- case I_CONNECTING:
- this->SetState(I_CONNECTED);
- /* Our socket was in write-state, so delete it and re-add it
- * in read-state.
- */
- ServerInstance->SE->DelFd(this->fd);
- ServerInstance->SE->AddFd(this->fd,true,X_ESTAB_MODULE);
- return this->OnConnected();
- break;
- case I_LISTENING:
- length = sizeof (client);
- incoming = accept (this->fd, (sockaddr*)&client,&length);
- this->OnIncomingConnection(incoming,inet_ntoa(client.sin_addr));
- return true;
- break;
- case I_CONNECTED:
- return this->OnDataReady();
- break;
+ 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:
- break;
+ // 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;
}
- if (this->Buffer.length())
- this->FlushWriteBuffer();
-
- return true;
+ unsigned int border = cidr.length / 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;
+ }
}
-void InspSocket::SetState(InspSocketState s)
+irc::sockets::cidr_mask::cidr_mask(const irc::sockets::sockaddrs& sa, unsigned char range)
{
- log(DEBUG,"Socket state change");
- this->state = s;
+ sa2cidr(*this, sa, range);
}
-InspSocketState InspSocket::GetState()
+irc::sockets::cidr_mask::cidr_mask(const std::string& mask)
{
- return this->state;
+ 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
+ {
+ unsigned char range = ConvToNum<unsigned char>(mask.substr(bits_chars + 1));
+ irc::sockets::aptosa(mask.substr(0, bits_chars), 0, sa);
+ sa2cidr(*this, sa, range);
+ }
}
-int InspSocket::GetFd()
+std::string irc::sockets::cidr_mask::str() const
{
- return this->fd;
+ irc::sockets::sockaddrs sa;
+ sa.sa.sa_family = type;
+
+ unsigned char* base;
+ size_t len;
+ switch (type)
+ {
+ 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 "<unknown>";
+ }
+
+ memcpy(base, bits, len);
+ return sa.addr() + "/" + ConvToStr((int)length);
}
-bool InspSocket::OnConnected() { return true; }
-void InspSocket::OnError(InspSocketError e) { return; }
-int InspSocket::OnDisconnect() { return 0; }
-int InspSocket::OnIncomingConnection(int newfd, char* ip) { return 0; }
-bool InspSocket::OnDataReady() { return true; }
-void InspSocket::OnTimeout() { return; }
-void InspSocket::OnClose() { return; }
+bool irc::sockets::cidr_mask::operator==(const cidr_mask& other) const
+{
+ return type == other.type && length == other.length &&
+ 0 == memcmp(bits, other.bits, 16);
+}
-InspSocket::~InspSocket()
+bool irc::sockets::cidr_mask::operator<(const cidr_mask& other) const
{
- this->Close();
+ 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;
+}