X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fm_ident.cpp;h=bea4c28030b85eabf74db8f052454944d7df7861;hb=efe77ba63b1e519fc4d563bd9b599277c4bd96e5;hp=a5f81c6f4ebb6c1ca1014aefd5ffb4eb6fb8cea9;hpb=05c0944bc22f16e24943a209429651e6226cc12c;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/modules/m_ident.cpp b/src/modules/m_ident.cpp index a5f81c6f4..bea4c2803 100644 --- a/src/modules/m_ident.cpp +++ b/src/modules/m_ident.cpp @@ -1,19 +1,28 @@ -/* +------------------------------------+ - * | Inspire Internet Relay Chat Daemon | - * +------------------------------------+ +/* + * InspIRCd -- Internet Relay Chat Daemon * - * InspIRCd: (C) 2002-2009 InspIRCd Development Team - * See: http://wiki.inspircd.org/Credits + * Copyright (C) 2009-2010 Daniel De Graaf + * Copyright (C) 2007, 2009 John Brooks + * Copyright (C) 2006-2008 Robin Burchell + * Copyright (C) 2005-2008 Craig Edwards + * Copyright (C) 2008 Thomas Stagner + * Copyright (C) 2007 Dennis Friis * - * 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" -/* $ModDesc: Provides support for RFC1413 ident lookups */ +#include "inspircd.h" /* -------------------------------------------------------------- * Note that this is the third incarnation of m_ident. The first @@ -73,131 +82,88 @@ class IdentRequestSocket : public EventHandler { - private: - User *user; /* User we are attached to */ - InspIRCd* ServerInstance; /* Server instance */ - bool done; /* True if lookup is finished */ - std::string result; /* Holds the ident string if done */ public: + LocalUser *user; /* User we are attached to */ + std::string result; /* Holds the ident string if done */ + time_t age; + bool done; /* True if lookup is finished */ - IdentRequestSocket(InspIRCd *Server, User* u, const std::string &bindip) : user(u), ServerInstance(Server), result(u->ident) + IdentRequestSocket(LocalUser* u) : user(u) { - socklen_t size = 0; -#ifdef IPV6 - /* Does this look like a v6 ip address? */ - bool v6 = false; - if ((bindip.empty()) || bindip.find(':') != std::string::npos) - v6 = true; - - if (v6) - SetFd(socket(AF_INET6, SOCK_STREAM, 0)); - else -#endif - SetFd(socket(AF_INET, SOCK_STREAM, 0)); + age = ServerInstance->Time(); + + SetFd(socket(user->server_sa.sa.sa_family, SOCK_STREAM, 0)); if (GetFd() == -1) throw ModuleException("Could not create socket"); done = false; - /* We allocate two of these because sizeof(sockaddr_in6) > sizeof(sockaddr_in) */ - irc::sockets::sockaddrs s; - irc::sockets::sockaddrs addr; + irc::sockets::sockaddrs bindaddr; + irc::sockets::sockaddrs connaddr; -#ifdef IPV6 - /* Horrid icky nasty ugly berkely socket crap. */ - if (v6) + memcpy(&bindaddr, &user->server_sa, sizeof(bindaddr)); + memcpy(&connaddr, &user->client_sa, sizeof(connaddr)); + + if (connaddr.sa.sa_family == AF_INET6) { - if (inet_pton(AF_INET6, user->GetIPString(), &addr.in6.sin6_addr) > 0) - { - addr.in6.sin6_family = AF_INET6; - addr.in6.sin6_port = htons(113); - size = sizeof(sockaddr_in6); - inet_pton(AF_INET6, bindip.c_str(), &s.in6.sin6_addr); - s.in6.sin6_family = AF_INET6; - s.in6.sin6_port = 0; - } + bindaddr.in6.sin6_port = 0; + connaddr.in6.sin6_port = htons(113); } else -#endif { - if (inet_aton(user->GetIPString(), &addr.in4.sin_addr) > 0) - { - addr.in4.sin_family = AF_INET; - addr.in4.sin_port = htons(113); - size = sizeof(sockaddr_in); - inet_aton(bindip.c_str(), &s.in4.sin_addr); - s.in4.sin_family = AF_INET; - s.in4.sin_port = 0; - } + bindaddr.in4.sin_port = 0; + connaddr.in4.sin_port = htons(113); } /* Attempt to bind (ident requests must come from the ip the query is referring to */ - if (ServerInstance->SE->Bind(GetFd(), &s.sa, size) < 0) + if (SocketEngine::Bind(GetFd(), bindaddr) < 0) { this->Close(); throw ModuleException("failed to bind()"); } - ServerInstance->SE->NonBlocking(GetFd()); + SocketEngine::NonBlocking(GetFd()); /* Attempt connection (nonblocking) */ - if (ServerInstance->SE->Connect(this, &addr.sa, size) == -1 && errno != EINPROGRESS) + if (SocketEngine::Connect(this, &connaddr.sa, connaddr.sa_size()) == -1 && errno != EINPROGRESS) { this->Close(); throw ModuleException("connect() failed"); } /* Add fd to socket engine */ - if (!ServerInstance->SE->AddFd(this)) + if (!SocketEngine::AddFd(this, FD_WANT_NO_READ | FD_WANT_POLL_WRITE)) { this->Close(); throw ModuleException("out of fds"); } - - /* Important: We set WantWrite immediately after connect() - * because a successful connection will trigger a writability event - */ - ServerInstance->SE->WantWrite(this); } - virtual void OnConnected() + void OnConnected() { - ServerInstance->Logs->Log("m_ident",DEBUG,"OnConnected()"); - - /* Both sockaddr_in and sockaddr_in6 can be safely casted to sockaddr, especially since the - * only members we use are in a part of the struct that should always be identical (at the - * byte level). */ - irc::sockets::sockaddrs laddr, raddr; - - socklen_t laddrsz = sizeof(laddr); - socklen_t raddrsz = sizeof(raddr); - - if ((getsockname(user->GetFd(), &laddr.sa, &laddrsz) != 0) || (getpeername(user->GetFd(), &raddr.sa, &raddrsz) != 0)) - { - done = true; - return; - } + ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "OnConnected()"); + SocketEngine::ChangeEventMask(this, FD_WANT_POLL_READ | FD_WANT_NO_WRITE); char req[32]; /* Build request in the form 'localport,remoteport\r\n' */ int req_size; -#ifdef IPV6 - if (raddr.sa.sa_family == AF_INET6) - req_size = snprintf(req, sizeof(req), "%d,%d\r\n", ntohs(raddr.in6.sin6_port), ntohs(laddr.in6.sin6_port)); + if (user->client_sa.sa.sa_family == AF_INET6) + req_size = snprintf(req, sizeof(req), "%d,%d\r\n", + ntohs(user->client_sa.in6.sin6_port), ntohs(user->server_sa.in6.sin6_port)); else -#endif - req_size = snprintf(req, sizeof(req), "%d,%d\r\n", ntohs(raddr.in4.sin_port), ntohs(laddr.in4.sin_port)); + req_size = snprintf(req, sizeof(req), "%d,%d\r\n", + ntohs(user->client_sa.in4.sin_port), ntohs(user->server_sa.in4.sin_port)); /* Send failed if we didnt write the whole ident request -- * might as well give up if this happens! */ - if (ServerInstance->SE->Send(this, req, req_size, 0) < req_size) + if (SocketEngine::Send(this, req, req_size, 0) < req_size) done = true; } - virtual void HandleEvent(EventType et, int errornum = 0) + void HandleEvent(EventType et, int errornum = 0) { switch (et) { @@ -211,7 +177,7 @@ class IdentRequestSocket : public EventHandler break; case EVENT_ERROR: /* fd error event, ohshi- */ - ServerInstance->Logs->Log("m_ident",DEBUG,"EVENT_ERROR"); + ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "EVENT_ERROR"); /* We *must* Close() here immediately or we get a * huge storm of EVENT_ERROR events! */ @@ -228,10 +194,9 @@ class IdentRequestSocket : public EventHandler */ if (GetFd() > -1) { - ServerInstance->Logs->Log("m_ident",DEBUG,"Close ident socket %d", GetFd()); - ServerInstance->SE->DelFd(this); - ServerInstance->SE->Close(GetFd()); - ServerInstance->SE->Shutdown(GetFd(), SHUT_WR); + ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Close ident socket %d", GetFd()); + SocketEngine::DelFd(this); + SocketEngine::Close(GetFd()); this->SetFd(-1); } } @@ -241,169 +206,117 @@ class IdentRequestSocket : public EventHandler return done; } - /* Note: if the lookup succeeded, will contain 'ident', otherwise - * will contain '~ident'. Use *GetResult() to determine lookup success. - */ - const char* GetResult() - { - return result.c_str(); - } - void ReadResponse() { /* We don't really need to buffer for incomplete replies here, since IDENT replies are * extremely short - there is *no* sane reason it'd be in more than one packet */ - char ibuf[MAXBUF]; - int recvresult = ServerInstance->SE->Recv(this, ibuf, MAXBUF-1, 0); + char ibuf[256]; + int recvresult = SocketEngine::Recv(this, ibuf, sizeof(ibuf)-1, 0); + + /* Close (but don't delete from memory) our socket + * and flag as done since the ident lookup has finished + */ + Close(); + done = true; /* Cant possibly be a valid response shorter than 3 chars, * because the shortest possible response would look like: '1,1' */ if (recvresult < 3) - { - Close(); - done = true; return; - } - ServerInstance->Logs->Log("m_ident",DEBUG,"ReadResponse()"); - - irc::sepstream sep(ibuf, ':'); - std::string token; - for (int i = 0; sep.GetToken(token); i++) - { - /* We only really care about the 4th portion */ - if (i < 3) - continue; + ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "ReadResponse()"); - std::string ident; + /* Truncate at the first null character, but first make sure + * there is at least one null char (at the end of the buffer). + */ + ibuf[recvresult] = '\0'; + std::string buf(ibuf); - /* Truncate the ident at any characters we don't like, skip leading spaces */ - size_t k = 0; - for (const char *j = token.c_str(); *j && (k < ServerInstance->Config->Limits.IdentMax + 1); j++) - { - if (*j == ' ') - continue; + /* <2 colons: invalid + * 2 colons: reply is an error + * >3 colons: there is a colon in the ident + */ + if (std::count(buf.begin(), buf.end(), ':') != 3) + return; - /* Rules taken from InspIRCd::IsIdent */ - if (((*j >= 'A') && (*j <= '}')) || ((*j >= '0') && (*j <= '9')) || (*j == '-') || (*j == '.')) - { - ident += *j; - continue; - } + std::string::size_type lastcolon = buf.rfind(':'); + /* Truncate the ident at any characters we don't like, skip leading spaces */ + for (std::string::const_iterator i = buf.begin()+lastcolon+1; i != buf.end(); ++i) + { + if (result.size() == ServerInstance->Config->Limits.IdentMax) + /* Ident is getting too long */ break; - } - /* Re-check with IsIdent, in case that changes and this doesn't (paranoia!) */ - if (!ident.empty() && ServerInstance->IsIdent(ident.c_str())) + if (*i == ' ') + continue; + + /* Add the next char to the result and see if it's still a valid ident, + * according to IsIdent(). If it isn't, then erase what we just added and + * we're done. + */ + result += *i; + if (!ServerInstance->IsIdent(result)) { - result = ident; + result.erase(result.end()-1); + break; } - - break; } - - /* Close (but dont delete from memory) our socket - * and flag as done - */ - Close(); - done = true; - return; } }; class ModuleIdent : public Module { - private: int RequestTimeout; - ConfigReader *Conf; + SimpleExtItem ext; public: - ModuleIdent(InspIRCd *Me) : Module(Me) - { - Conf = new ConfigReader(ServerInstance); - OnRehash(NULL, ""); - Implementation eventlist[] = { I_OnRehash, I_OnUserRegister, I_OnCheckReady, I_OnCleanup, I_OnUserDisconnect }; - ServerInstance->Modules->Attach(eventlist, this, 5); - } - - ~ModuleIdent() + ModuleIdent() : ext("ident_socket", this) { - delete Conf; } - virtual Version GetVersion() + Version GetVersion() CXX11_OVERRIDE { - return Version("$Id$", VF_VENDOR, API_VERSION); + return Version("Provides support for RFC1413 ident lookups", VF_VENDOR); } - virtual void OnRehash(User *user, const std::string ¶m) + void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE { - delete Conf; - Conf = new ConfigReader(ServerInstance); - - RequestTimeout = Conf->ReadInteger("ident", "timeout", 0, true); + RequestTimeout = ServerInstance->Config->ConfValue("ident")->getInt("timeout", 5); if (!RequestTimeout) RequestTimeout = 5; } - virtual int OnUserRegister(User *user) + void OnUserInit(LocalUser *user) CXX11_OVERRIDE { - for (int j = 0; j < Conf->Enumerate("connect"); j++) - { - std::string hostn = Conf->ReadValue("connect","allow",j); - /* XXX: Fixme: does not respect port, limit, etc */ - if ((InspIRCd::MatchCIDR(user->GetIPString(),hostn, ascii_case_insensitive_map)) || (InspIRCd::Match(user->host,hostn, ascii_case_insensitive_map))) - { - bool useident = Conf->ReadFlag("connect", "useident", "yes", j); - - if (!useident) - return 0; - } - } - - /* User::ident is currently the username field from USER; with m_ident loaded, that - * should be preceded by a ~. The field is actually IdentMax+2 characters wide. */ - if (user->ident.length() > ServerInstance->Config->Limits.IdentMax + 1) - user->ident.assign(user->ident, 0, ServerInstance->Config->Limits.IdentMax); - user->ident.insert(0, "~"); - - user->WriteServ("NOTICE Auth :*** Looking up your ident..."); + ConfigTag* tag = user->MyClass->config; + if (!tag->getBool("useident", true)) + return; - // Get the IP that the user is connected to, and bind to that for the outgoing connection - const char *ip = user->GetIPString(); + user->WriteNotice("*** Looking up your ident..."); - IdentRequestSocket *isock = NULL; try { - isock = new IdentRequestSocket(ServerInstance, user, ip); + IdentRequestSocket *isock = new IdentRequestSocket(IS_LOCAL(user)); + ext.set(user, isock); } catch (ModuleException &e) { - ServerInstance->Logs->Log("m_ident",DEBUG,"Ident exception: %s", e.GetReason()); - return 0; + ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Ident exception: " + e.GetReason()); } - - user->Extend("ident_socket", isock); - return 0; } /* This triggers pretty regularly, we can use it in preference to * creating a Timer object and especially better than creating a * Timer per ident lookup! */ - virtual bool OnCheckReady(User *user) + ModResult OnCheckReady(LocalUser *user) CXX11_OVERRIDE { /* Does user have an ident socket attached at all? */ - IdentRequestSocket *isock = NULL; - if (!user->GetExt("ident_socket", isock)) - { - ServerInstance->Logs->Log("m_ident",DEBUG, "No ident socket :("); - return true; - } - - ServerInstance->Logs->Log("m_ident",DEBUG, "Has ident_socket"); + IdentRequestSocket *isock = ext.get(user); + if (!isock) + return MOD_RES_PASSTHRU; time_t compare = isock->age; compare += RequestTimeout; @@ -412,57 +325,60 @@ class ModuleIdent : public Module if (ServerInstance->Time() >= compare) { /* Ident timeout */ - user->WriteServ("NOTICE Auth :*** Ident request timed out."); - ServerInstance->Logs->Log("m_ident",DEBUG, "Timeout"); - /* The user isnt actually disconnecting, - * we call this to clean up the user - */ - OnUserDisconnect(user); - return true; + user->WriteNotice("*** Ident request timed out."); } - - /* Got a result yet? */ - if (!isock->HasResult()) + else if (!isock->HasResult()) { - ServerInstance->Logs->Log("m_ident",DEBUG, "No result yet"); - return false; + // time still good, no result yet... hold the registration + return MOD_RES_DENY; } - ServerInstance->Logs->Log("m_ident",DEBUG, "Yay, result!"); - /* wooo, got a result (it will be good, or bad) */ - if (*(isock->GetResult()) != '~') - user->WriteServ("NOTICE Auth :*** Found your ident, '%s'", isock->GetResult()); + if (isock->result.empty()) + { + user->ident.insert(user->ident.begin(), 1, '~'); + user->WriteNotice("*** Could not find your ident, using " + user->ident + " instead."); + } else - user->WriteServ("NOTICE Auth :*** Could not find your ident, using %s instead.", isock->GetResult()); + { + user->ident = isock->result; + user->WriteNotice("*** Found your ident, '" + user->ident + "'"); + } - /* Copy the ident string to the user */ - user->ident.assign(isock->GetResult(), 0, ServerInstance->Config->Limits.IdentMax + 1); + user->InvalidateCache(); + isock->Close(); + ext.unset(user); + return MOD_RES_PASSTHRU; + } - /* The user isnt actually disconnecting, we call this to clean up the user */ - OnUserDisconnect(user); - return true; + ModResult OnSetConnectClass(LocalUser* user, ConnectClass* myclass) CXX11_OVERRIDE + { + if (myclass->config->getBool("requireident") && user->ident[0] == '~') + return MOD_RES_DENY; + return MOD_RES_PASSTHRU; } - virtual void OnCleanup(int target_type, void *item) + void OnCleanup(int target_type, void *item) CXX11_OVERRIDE { /* Module unloading, tidy up users */ if (target_type == TYPE_USER) - OnUserDisconnect((User*)item); + { + LocalUser* user = IS_LOCAL((User*) item); + if (user) + OnUserDisconnect(user); + } } - virtual void OnUserDisconnect(User *user) + void OnUserDisconnect(LocalUser *user) CXX11_OVERRIDE { /* User disconnect (generic socket detatch event) */ - IdentRequestSocket *isock = NULL; - if (user->GetExt("ident_socket", isock)) + IdentRequestSocket *isock = ext.get(user); + if (isock) { isock->Close(); - delete isock; - user->Shrink("ident_socket"); + ext.unset(user); } } }; MODULE_INIT(ModuleIdent) -