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Diffstat (limited to 'src/userprocess.cpp')
| -rw-r--r-- | src/userprocess.cpp | 391 |
1 files changed, 391 insertions, 0 deletions
diff --git a/src/userprocess.cpp b/src/userprocess.cpp new file mode 100644 index 000000000..0b8474583 --- /dev/null +++ b/src/userprocess.cpp @@ -0,0 +1,391 @@ +/* +------------------------------------+ + * | Inspire Internet Relay Chat Daemon | + * +------------------------------------+ + * + * Inspire is copyright (C) 2002-2005 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. + * + * --------------------------------------------------- + */ + +/* Now with added unF! ;) */ + +using namespace std; + +#include "inspircd_config.h" +#include "inspircd.h" +#include "inspircd_io.h" +#include "inspircd_util.h" +#include <unistd.h> +#include <fcntl.h> +#include <sys/errno.h> +#include <sys/ioctl.h> +#include <sys/utsname.h> +#include <time.h> +#include <string> +#ifdef GCC3 +#include <ext/hash_map> +#else +#include <hash_map> +#endif +#include <map> +#include <sstream> +#include <vector> +#include <deque> +#include <sched.h> +#ifdef THREADED_DNS +#include <pthread.h> +#endif +#include "users.h" +#include "ctables.h" +#include "globals.h" +#include "modules.h" +#include "dynamic.h" +#include "wildcard.h" +#include "message.h" +#include "mode.h" +#include "commands.h" +#include "xline.h" +#include "inspstring.h" +#include "dnsqueue.h" +#include "helperfuncs.h" +#include "hashcomp.h" +#include "socketengine.h" + +extern int MODCOUNT; +extern int openSockfd[MAXSOCKS]; +extern bool nofork; +extern bool unlimitcore; +extern struct sockaddr_in client,server; +extern char addrs[MAXBUF][255]; +extern socklen_t length; +extern char configToken[MAXBUF], Addr[MAXBUF], Type[MAXBUF]; + +extern char DisabledCommands[MAXBUF]; + +extern bool AllowHalfop; +extern bool AllowProtect; +extern bool AllowFounder; + +extern std::vector<Module*> modules; +extern std::vector<std::string> module_names; +extern std::vector<ircd_module*> factory; + +extern std::vector<InspSocket*> module_sockets; + +extern SocketEngine* SE; + +void ProcessUser(userrec* cu) +{ + int result = EAGAIN; + log(DEBUG,"Processing user with fd %d",cu->fd); + int MOD_RESULT = 0; + int result2 = 0; + FOREACH_RESULT(OnRawSocketRead(cu->fd,data,65535,result2)); + if (!MOD_RESULT) + { + result = cu->ReadData(data, 65535); + } + else + { + log(DEBUG,"Data result returned by module: %d",MOD_RESULT); + result = result2; + } + log(DEBUG,"Read result: %d",result); + if (result) + { + statsRecv += result; + // perform a check on the raw buffer as an array (not a string!) to remove + // characters 0 and 7 which are illegal in the RFC - replace them with spaces. + // hopefully this should stop even more people whining about "Unknown command: *" + for (int checker = 0; checker < result; checker++) + { + if ((data[checker] == 0) || (data[checker] == 7)) + data[checker] = ' '; + } + if (result > 0) + data[result] = '\0'; + userrec* current = cu; + int currfd = current->fd; + int floodlines = 0; + // add the data to the users buffer + if (result > 0) + { + if (!current->AddBuffer(data)) + { + // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good. + if (current->registered == 7) + { + kill_link(current,"RecvQ exceeded"); + } + else + { + WriteOpers("*** Excess flood from %s",current->ip); + log(DEFAULT,"Excess flood from: %s",current->ip); + add_zline(120,ServerName,"Flood from unregistered connection",current->ip); + apply_lines(); + } + return; + } + if (current->recvq.length() > (unsigned)NetBufferSize) + { + if (current->registered == 7) + { + kill_link(current,"RecvQ exceeded"); + } + else + { + WriteOpers("*** Excess flood from %s",current->ip); + log(DEFAULT,"Excess flood from: %s",current->ip); + add_zline(120,ServerName,"Flood from unregistered connection",current->ip); + apply_lines(); + } + return; + } + // while there are complete lines to process... + while (current->BufferIsReady()) + { + floodlines++; + if (TIME > current->reset_due) + { + current->reset_due = TIME + current->threshold; + current->lines_in = 0; + } + current->lines_in++; + if (current->lines_in > current->flood) + { + log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host); + WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host); + kill_link(current,"Excess flood"); + return; + } + if ((floodlines > current->flood) && (current->flood != 0)) + { + if (current->registered == 7) + { + log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host); + WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host); + kill_link(current,"Excess flood"); + } + else + { + add_zline(120,ServerName,"Flood from unregistered connection",current->ip); + apply_lines(); + } + return; + } + char sanitized[MAXBUF]; + // use GetBuffer to copy single lines into the sanitized string + std::string single_line = current->GetBuffer(); + current->bytes_in += single_line.length(); + current->cmds_in++; + if (single_line.length()>512) + { + log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host); + WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host); + kill_link(current,"Excess flood"); + return; + } + strlcpy(sanitized,single_line.c_str(),MAXBUF); + if (*sanitized) + { + userrec* old_comp = fd_ref_table[currfd]; + // we're gonna re-scan to check if the nick is gone, after every + // command - if it has, we're gonna bail + process_buffer(sanitized,current); + // look for the user's record in case it's changed... if theyve quit, + // we cant do anything more with their buffer, so bail. + // there used to be an ugly, slow loop here. Now we have a reference + // table, life is much easier (and FASTER) + userrec* new_comp = fd_ref_table[currfd]; + if ((currfd < 0) || (!fd_ref_table[currfd]) || (old_comp != new_comp)) + { + return; + } + else + { + /* The user is still here, flush their buffer */ + current->FlushWriteBuf(); + } + } + } + return; + } + if ((result == -1) && (errno != EAGAIN) && (errno != EINTR)) + { + log(DEBUG,"killing: %s",cu->nick); + kill_link(cu,strerror(errno)); + return; + } + } + // result EAGAIN means nothing read + else if (result == EAGAIN) + { + } + else if (result == 0) + { + log(DEBUG,"InspIRCd: Exited: %s",cu->nick); + kill_link(cu,"Client exited"); + log(DEBUG,"Bailing from client exit"); + return; + } +} + + +/** + * This function is called once a second from the mainloop. + * It is intended to do background checking on all the user structs, e.g. + * stuff like ping checks, registration timeouts, etc. + * The function returns false when it is finished, and true if + * it needs to be run again (e.g. it has processed one of a batch of + * QUIT messages, but couldnt continue iterating because the iterator + * became invalid). This function is also responsible for checking + * if InspSocket derived classes are timed out. + */ +bool DoBackgroundUserStuff(time_t TIME) +{ + unsigned int numsockets = module_sockets.size(); + for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++) + { + InspSocket* s = (InspSocket*)*a; + if (s->Timeout(TIME)) + { + log(DEBUG,"Socket poll returned false, close and bail"); + SE->DelFd(s->GetFd()); + s->Close(); + module_sockets.erase(a); + delete s; + break; + } + if (module_sockets.size() != numsockets) break; + } + /* TODO: We need a seperate hash containing only local users for this + */ + for (user_hash::iterator count2 = clientlist.begin(); count2 != clientlist.end(); count2++) + { + /* Sanity checks for corrupted iterators (yes, really) */ + userrec* curr = NULL; + if (count2->second) + curr = count2->second; + if ((long)curr == -1) + return false; + + if ((curr) && (curr->fd != 0)) + { + int currfd = curr->fd; + // we don't check the state of remote users. + if ((currfd != -1) && (currfd != FD_MAGIC_NUMBER)) + { + curr->FlushWriteBuf(); + if (curr->GetWriteError() != "") + { + log(DEBUG,"InspIRCd: write error: %s",curr->GetWriteError().c_str()); + kill_link(curr,curr->GetWriteError().c_str()); + return true; + } + // registration timeout -- didnt send USER/NICK/HOST in the time specified in + // their connection class. + if (((unsigned)TIME > (unsigned)curr->timeout) && (curr->registered != 7)) + { + log(DEBUG,"InspIRCd: registration timeout: %s",curr->nick); + kill_link(curr,"Registration timeout"); + return true; + } + if ((TIME > curr->signon) && (curr->registered == 3) && (AllModulesReportReady(curr))) + { + log(DEBUG,"signon exceed, registered=3, and modules ready, OK: %d %d",TIME,curr->signon); + curr->dns_done = true; + statsDnsBad++; + FullConnectUser(curr); + if (fd_ref_table[currfd] != curr) // something changed, bail pronto + return true; + } + if ((curr->dns_done) && (curr->registered == 3) && (AllModulesReportReady(curr))) + { + log(DEBUG,"dns done, registered=3, and modules ready, OK"); + FullConnectUser(curr); + if (fd_ref_table[currfd] != curr) // something changed, bail pronto + return true; + } + if ((TIME > curr->nping) && (isnick(curr->nick)) && (curr->registered == 7)) + { + if ((!curr->lastping) && (curr->registered == 7)) + { + log(DEBUG,"InspIRCd: ping timeout: %s",curr->nick); + kill_link(curr,"Ping timeout"); + return true; + } + Write(curr->fd,"PING :%s",ServerName); + log(DEBUG,"InspIRCd: pinging: %s",curr->nick); + curr->lastping = 0; + curr->nping = TIME+curr->pingmax; // was hard coded to 120 + } + } + } + } + return false; +} + +void OpenLog(char** argv, int argc) +{ + std::string logpath = GetFullProgDir(argv,argc) + "/ircd.log"; + log_file = fopen(logpath.c_str(),"a+"); + if (!log_file) + { + printf("ERROR: Could not write to logfile %s, bailing!\n\n",logpath.c_str()); + Exit(ERROR); + } +#ifdef IS_CYGWIN + printf("Logging to ircd.log...\n"); +#else + printf("Logging to %s...\n",logpath.c_str()); +#endif +} + + +void CheckRoot() +{ + if (geteuid() == 0) + { + printf("WARNING!!! You are running an irc server as ROOT!!! DO NOT DO THIS!!!\n\n"); + log(DEFAULT,"InspIRCd: startup: not starting with UID 0!"); + Exit(ERROR); + } +} + + +void CheckDie() +{ + if (DieValue[0]) + { + printf("WARNING: %s\n\n",DieValue); + log(DEFAULT,"Ut-Oh, somebody didn't read their config file: '%s'",DieValue); + exit(0); + } +} + +void LoadAllModules() +{ + /* We must load the modules AFTER initializing the socket engine, now */ + MODCOUNT = -1; + for (int count = 0; count < ConfValueEnum("module",&config_f); count++) + { + ConfValue("module","name",count,configToken,&config_f); + printf("Loading module... \033[1;32m%s\033[0m\n",configToken); + if (!LoadModule(configToken)) + { + log(DEFAULT,"Exiting due to a module loader error."); + printf("\nThere was an error loading a module: %s\n\nYou might want to do './inspircd start' instead of 'bin/inspircd'\n\n",ModuleError()); + Exit(0); + } + } + log(DEFAULT,"Total loaded modules: %lu",(unsigned long)MODCOUNT+1); +} + + |