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- /*
- * ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001-2007 Alexander Barton (alex@barton.de)
- *
- * This program 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; either version 2 of the License, or
- * (at your option) any later version.
- * Please read the file COPYING, README and AUTHORS for more information.
- *
- * Connection management
- */
- #define CONN_MODULE
- #include "portab.h"
- #include "io.h"
- static char UNUSED id[] = "$Id: conn.c,v 1.198.2.6 2007/05/18 22:11:19 alex Exp $";
- #include "imp.h"
- #include <assert.h>
- #ifdef PROTOTYPES
- # include <stdarg.h>
- #else
- # include <varargs.h>
- #endif
- #include <stdio.h>
- #include <stdlib.h>
- #include <unistd.h>
- #include <errno.h>
- #include <string.h>
- #include <sys/socket.h>
- #include <sys/time.h>
- #include <sys/types.h>
- #include <time.h>
- #include <netinet/in.h>
- #ifdef HAVE_NETINET_IP_H
- # include <netinet/ip.h>
- #endif
- #ifdef HAVE_ARPA_INET_H
- # include <arpa/inet.h>
- #else
- # define PF_INET AF_INET
- #endif
- #ifdef HAVE_STDINT_H
- # include <stdint.h> /* e.g. for Mac OS X */
- #endif
- #ifdef TCPWRAP
- # include <tcpd.h> /* for TCP Wrappers */
- #endif
- #include "array.h"
- #include "defines.h"
- #include "resolve.h"
- #include "exp.h"
- #include "conn.h"
- #include "imp.h"
- #include "ngircd.h"
- #include "client.h"
- #include "conf.h"
- #include "conn-zip.h"
- #include "conn-func.h"
- #include "log.h"
- #include "parse.h"
- #include "tool.h"
- #ifdef ZEROCONF
- # include "rendezvous.h"
- #endif
- #include "exp.h"
- #define SERVER_WAIT (NONE - 1)
- static bool Handle_Write PARAMS(( CONN_ID Idx ));
- static bool Conn_Write PARAMS(( CONN_ID Idx, char *Data, size_t Len ));
- static int New_Connection PARAMS(( int Sock ));
- static CONN_ID Socket2Index PARAMS(( int Sock ));
- static void Read_Request PARAMS(( CONN_ID Idx ));
- static bool Handle_Buffer PARAMS(( CONN_ID Idx ));
- static void Check_Connections PARAMS(( void ));
- static void Check_Servers PARAMS(( void ));
- static void Init_Conn_Struct PARAMS(( CONN_ID Idx ));
- static bool Init_Socket PARAMS(( int Sock ));
- static void New_Server PARAMS(( int Server ));
- static void Simple_Message PARAMS(( int Sock, const char *Msg ));
- static int Count_Connections PARAMS(( struct sockaddr_in addr ));
- static int NewListener PARAMS(( const UINT16 Port ));
- static array My_Listeners;
- static array My_ConnArray;
- #ifdef TCPWRAP
- int allow_severity = LOG_INFO;
- int deny_severity = LOG_ERR;
- #endif
- static void server_login PARAMS((CONN_ID idx));
- static void cb_Read_Resolver_Result PARAMS(( int sock, UNUSED short what));
- static void cb_Connect_to_Server PARAMS(( int sock, UNUSED short what));
- static void cb_clientserver PARAMS((int sock, short what));
- static void
- cb_listen(int sock, short irrelevant)
- {
- (void) irrelevant;
- New_Connection( sock );
- }
- static void
- cb_connserver(int sock, UNUSED short what)
- {
- int res, err;
- socklen_t sock_len;
- CONN_ID idx = Socket2Index( sock );
- if (idx <= NONE) {
- LogDebug("cb_connserver wants to write on unknown socket?!");
- io_close(sock);
- return;
- }
- assert( what & IO_WANTWRITE);
- /* connect() finished, get result. */
- sock_len = sizeof( err );
- res = getsockopt( My_Connections[idx].sock, SOL_SOCKET, SO_ERROR, &err, &sock_len );
- assert( sock_len == sizeof( err ));
- /* Error while connecting? */
- if ((res != 0) || (err != 0)) {
- if (res != 0)
- Log(LOG_CRIT, "getsockopt (connection %d): %s!",
- idx, strerror(errno));
- else
- Log(LOG_CRIT,
- "Can't connect socket to \"%s:%d\" (connection %d): %s!",
- My_Connections[idx].host,
- Conf_Server[Conf_GetServer(idx)].port,
- idx, strerror(err));
- Conn_Close(idx, "Can't connect!", NULL, false);
- return;
- }
- Conn_OPTION_DEL( &My_Connections[idx], CONN_ISCONNECTING );
- server_login(idx);
- }
- static void
- server_login(CONN_ID idx)
- {
- Log( LOG_INFO, "Connection %d with \"%s:%d\" established. Now logging in ...", idx,
- My_Connections[idx].host, Conf_Server[Conf_GetServer( idx )].port );
- io_event_setcb( My_Connections[idx].sock, cb_clientserver);
- io_event_add( My_Connections[idx].sock, IO_WANTREAD|IO_WANTWRITE);
- /* Send PASS and SERVER command to peer */
- Conn_WriteStr( idx, "PASS %s %s", Conf_Server[Conf_GetServer( idx )].pwd_out, NGIRCd_ProtoID );
- Conn_WriteStr( idx, "SERVER %s :%s", Conf_ServerName, Conf_ServerInfo );
- }
- static void
- cb_clientserver(int sock, short what)
- {
- CONN_ID idx = Socket2Index( sock );
- if (idx <= NONE) {
- #ifdef DEBUG
- Log(LOG_WARNING, "WTF: cb_clientserver wants to write on unknown socket?!");
- #endif
- io_close(sock);
- return;
- }
- if (what & IO_WANTREAD)
- Read_Request( idx );
- if (what & IO_WANTWRITE)
- Handle_Write( idx );
- }
- GLOBAL void
- Conn_Init( void )
- {
- /* Modul initialisieren: statische Strukturen "ausnullen". */
- CONN_ID i;
- /* Speicher fuer Verbindungs-Pool anfordern */
- Pool_Size = CONNECTION_POOL;
- if( Conf_MaxConnections > 0 )
- {
- /* konfiguriertes Limit beachten */
- if( Pool_Size > Conf_MaxConnections ) Pool_Size = Conf_MaxConnections;
- }
-
- if (!array_alloc(&My_ConnArray, sizeof(CONNECTION), (size_t)Pool_Size)) {
- Log( LOG_EMERG, "Can't allocate memory! [Conn_Init]" );
- exit( 1 );
- }
- /* FIXME: My_Connetions/Pool_Size is needed by other parts of the
- * code; remove them! */
- My_Connections = (CONNECTION*) array_start(&My_ConnArray);
- LogDebug("Allocated connection pool for %d items (%ld bytes).",
- array_length(&My_ConnArray, sizeof( CONNECTION )), array_bytes(&My_ConnArray));
- assert( array_length(&My_ConnArray, sizeof( CONNECTION )) >= (size_t) Pool_Size);
-
- array_free( &My_Listeners );
- /* Connection-Struktur initialisieren */
- for( i = 0; i < Pool_Size; i++ ) Init_Conn_Struct( i );
- /* Global write counter */
- WCounter = 0;
- } /* Conn_Init */
- GLOBAL void
- Conn_Exit( void )
- {
- /* Modul abmelden: alle noch offenen Connections
- * schliessen und freigeben. */
- CONN_ID idx;
- LogDebug("Shutting down all connections ..." );
- Conn_ExitListeners();
- /* Sockets schliessen */
- for( idx = 0; idx < Pool_Size; idx++ ) {
- if( My_Connections[idx].sock > NONE ) {
- Conn_Close( idx, NULL, NGIRCd_SignalRestart ?
- "Server going down (restarting)":"Server going down", true );
- }
- }
- array_free(&My_ConnArray);
- My_Connections = NULL;
- Pool_Size = 0;
- io_library_shutdown();
- } /* Conn_Exit */
- static int
- ports_initlisteners(array *a, void (*func)(int,short))
- {
- int created = 0;
- size_t len;
- int fd;
- UINT16 *port;
- len = array_length(a, sizeof (UINT16));
- port = array_start(a);
- while(len--) {
- fd = NewListener( *port );
- if (fd < 0) {
- port++;
- continue;
- }
- if (!io_event_create( fd, IO_WANTREAD, func )) {
- Log( LOG_ERR, "io_event_create(): Could not add listening fd %d (port %u): %s!",
- fd, (unsigned int) *port, strerror(errno));
- close(fd);
- port++;
- continue;
- }
- created++;
- port++;
- }
- return created;
- }
- GLOBAL int
- Conn_InitListeners( void )
- {
- /* Initialize ports on which the server should accept connections */
- int created;
- if (!io_library_init(CONNECTION_POOL)) {
- Log(LOG_EMERG, "Cannot initialize IO routines: %s", strerror(errno));
- return -1;
- }
- created = ports_initlisteners(&Conf_ListenPorts, cb_listen);
- return created;
- } /* Conn_InitListeners */
- GLOBAL void
- Conn_ExitListeners( void )
- {
- /* Close down all listening sockets */
- int *fd;
- size_t arraylen;
- #ifdef ZEROCONF
- Rendezvous_UnregisterListeners( );
- #endif
- arraylen = array_length(&My_Listeners, sizeof (int));
- Log( LOG_INFO, "Shutting down all listening sockets (%d total)...", arraylen );
- fd = array_start(&My_Listeners);
- while(arraylen--) {
- assert(fd != NULL);
- assert(*fd >= 0);
- io_close(*fd);
- LogDebug("Listening socket %d closed.", *fd );
- fd++;
- }
- array_free(&My_Listeners);
- } /* Conn_ExitListeners */
- /* return new listening port file descriptor or -1 on failure */
- static int
- NewListener( const UINT16 Port )
- {
- /* Create new listening socket on specified port */
- struct sockaddr_in addr;
- struct in_addr inaddr;
- int sock;
- #ifdef ZEROCONF
- char name[CLIENT_ID_LEN], *info;
- #endif
- /* Server-"Listen"-Socket initialisieren */
- memset( &addr, 0, sizeof( addr ));
- memset( &inaddr, 0, sizeof( inaddr ));
- addr.sin_family = (sa_family_t)AF_INET;
- addr.sin_port = htons( Port );
- if( Conf_ListenAddress[0] )
- {
- #ifdef HAVE_INET_ATON
- if( inet_aton( Conf_ListenAddress, &inaddr ) == 0 )
- #else
- inaddr.s_addr = inet_addr( Conf_ListenAddress );
- if( inaddr.s_addr == (unsigned)-1 )
- #endif
- {
- Log( LOG_CRIT, "Can't listen on %s:%u: can't convert ip address %s!",
- Conf_ListenAddress, Port, Conf_ListenAddress );
- return -1;
- }
- }
- else inaddr.s_addr = htonl( INADDR_ANY );
- addr.sin_addr = inaddr;
- sock = socket( PF_INET, SOCK_STREAM, 0);
- if( sock < 0 ) {
- Log( LOG_CRIT, "Can't create socket: %s!", strerror( errno ));
- return -1;
- }
- if( ! Init_Socket( sock )) return -1;
- if (bind(sock, (struct sockaddr *)&addr, (socklen_t)sizeof(addr)) != 0) {
- Log( LOG_CRIT, "Can't bind socket (port %d) : %s!", Port, strerror( errno ));
- close( sock );
- return -1;
- }
- if( listen( sock, 10 ) != 0 ) {
- Log( LOG_CRIT, "Can't listen on socket: %s!", strerror( errno ));
- close( sock );
- return -1;
- }
- /* keep fd in list so we can close it when ngircd restarts/shuts down */
- if (!array_catb( &My_Listeners,(char*) &sock, sizeof(int) )) {
- Log( LOG_CRIT, "Can't add socket to My_Listeners array: %s!", strerror( errno ));
- close( sock );
- return -1;
- }
- if( Conf_ListenAddress[0]) Log( LOG_INFO, "Now listening on %s:%d (socket %d).", Conf_ListenAddress, Port, sock );
- else Log( LOG_INFO, "Now listening on 0.0.0.0:%d (socket %d).", Port, sock );
- #ifdef ZEROCONF
- /* Get best server description text */
- if( ! Conf_ServerInfo[0] ) info = Conf_ServerName;
- else
- {
- /* Use server info string */
- info = NULL;
- if( Conf_ServerInfo[0] == '[' )
- {
- /* Cut off leading hostname part in "[]" */
- info = strchr( Conf_ServerInfo, ']' );
- if( info )
- {
- info++;
- while( *info == ' ' ) info++;
- }
- }
- if( ! info ) info = Conf_ServerInfo;
- }
- /* Add port number to description if non-standard */
- if (Port != 6667)
- snprintf(name, sizeof name, "%s (port %u)", info,
- (unsigned int)Port);
- else
- strlcpy(name, info, sizeof name);
- /* Register service */
- Rendezvous_Register( name, MDNS_TYPE, Port );
- #endif
- return sock;
- } /* NewListener */
- GLOBAL void
- Conn_Handler( void )
- {
- /* "Main Loop.": Loop until a signal (for shutdown or restart) arrives.
- * Call io_dispatch() to check for read/writeable sockets every second
- * Wait for status change on pending connections (e.g: when the hostname has been resolved)
- * check for penalty/timeouts
- * handle input buffers
- */
- int i;
- unsigned int wdatalen;
- struct timeval tv;
- time_t t;
- bool timeout;
- while(( ! NGIRCd_SignalQuit ) && ( ! NGIRCd_SignalRestart )) {
- timeout = true;
- #ifdef ZEROCONF
- Rendezvous_Handler( );
- #endif
- /* Should the configuration be reloaded? */
- if (NGIRCd_SignalRehash) {
- NGIRCd_Rehash( );
- }
- /* Check configured servers and established links */
- Check_Servers( );
- Check_Connections( );
- t = time( NULL );
- /* noch volle Lese-Buffer suchen */
- for( i = 0; i < Pool_Size; i++ ) {
- if(( My_Connections[i].sock > NONE ) && ( array_bytes(&My_Connections[i].rbuf) > 0 ) &&
- ( My_Connections[i].delaytime < t ))
- {
- /* Kann aus dem Buffer noch ein Befehl extrahiert werden? */
- if (Handle_Buffer( i )) timeout = false;
- }
- }
- /* noch volle Schreib-Puffer suchen */
- for( i = 0; i < Pool_Size; i++ ) {
- if ( My_Connections[i].sock <= NONE )
- continue;
- wdatalen = (unsigned int)array_bytes(&My_Connections[i].wbuf);
- #ifdef ZLIB
- if (( wdatalen > 0 ) || ( array_bytes(&My_Connections[i].zip.wbuf)> 0 ))
- #else
- if ( wdatalen > 0 )
- #endif
- {
- /* Socket der Verbindung in Set aufnehmen */
- io_event_add( My_Connections[i].sock, IO_WANTWRITE );
- }
- }
- /* von welchen Sockets koennte gelesen werden? */
- for (i = 0; i < Pool_Size; i++ ) {
- if ( My_Connections[i].sock <= NONE )
- continue;
- if (Resolve_INPROGRESS(&My_Connections[i].res_stat)) {
- /* wait for completion of Resolver Sub-Process */
- io_event_del( My_Connections[i].sock, IO_WANTREAD );
- continue;
- }
- if ( Conn_OPTION_ISSET( &My_Connections[i], CONN_ISCONNECTING ))
- continue; /* wait for completion of connect() */
- if( My_Connections[i].delaytime > t ) {
- /* Fuer die Verbindung ist eine "Penalty-Zeit" gesetzt */
- io_event_del( My_Connections[i].sock, IO_WANTREAD );
- continue;
- }
- io_event_add( My_Connections[i].sock, IO_WANTREAD );
- }
- /* (re-)set timeout - tv_sec/usec are undefined after io_dispatch() returns */
- tv.tv_usec = 0;
- tv.tv_sec = timeout ? 1 : 0;
- /* wait for activity */
- i = io_dispatch( &tv );
- if (i == -1 && errno != EINTR ) {
- Log(LOG_EMERG, "Conn_Handler(): io_dispatch(): %s!", strerror(errno));
- Log(LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME);
- exit( 1 );
- }
- }
- if( NGIRCd_SignalQuit ) Log( LOG_NOTICE|LOG_snotice, "Server going down NOW!" );
- else if( NGIRCd_SignalRestart ) Log( LOG_NOTICE|LOG_snotice, "Server restarting NOW!" );
- } /* Conn_Handler */
- /**
- * Write a text string into the socket of a connection.
- * This function automatically appends CR+LF to the string and validates that
- * the result is a valid IRC message (oversized messages are shortened, for
- * example). Then it calls the Conn_Write() function to do the actual sending.
- * @param Idx Index fo the connection.
- * @param Format Format string, see printf().
- * @return true on success, false otherwise.
- */
- #ifdef PROTOTYPES
- GLOBAL bool
- Conn_WriteStr( CONN_ID Idx, char *Format, ... )
- #else
- GLOBAL bool
- Conn_WriteStr( Idx, Format, va_alist )
- CONN_ID Idx;
- char *Format;
- va_dcl
- #endif
- {
- char buffer[COMMAND_LEN];
- size_t len;
- bool ok;
- va_list ap;
- assert( Idx > NONE );
- assert( Format != NULL );
- #ifdef PROTOTYPES
- va_start( ap, Format );
- #else
- va_start( ap );
- #endif
- if (vsnprintf( buffer, COMMAND_LEN - 2, Format, ap ) >= COMMAND_LEN - 2 ) {
- /*
- * The string that should be written to the socket is longer
- * than the allowed size of COMMAND_LEN bytes (including both
- * the CR and LF characters). This can be caused by the
- * IRC_WriteXXX() functions when the prefix of this server had
- * to be added to an already "quite long" command line which
- * has been received from a regular IRC client, for example.
- *
- * We are not allowed to send such "oversized" messages to
- * other servers and clients, see RFC 2812 2.3 and 2813 3.3
- * ("these messages SHALL NOT exceed 512 characters in length,
- * counting all characters including the trailing CR-LF").
- *
- * So we have a big problem here: we should send more bytes
- * to the network than we are allowed to and we don't know
- * the originator (any more). The "old" behaviour of blaming
- * the receiver ("next hop") is a bad idea (it could be just
- * an other server only routing the message!), so the only
- * option left is to shorten the string and to hope that the
- * result is still somewhat useful ...
- * -alex-
- */
- strcpy (buffer + sizeof(buffer) - strlen(CUT_TXTSUFFIX) - 2 - 1,
- CUT_TXTSUFFIX);
- }
- #ifdef SNIFFER
- if (NGIRCd_Sniffer)
- Log(LOG_DEBUG, " -> connection %d: '%s'.", Idx, buffer);
- #endif
- len = strlcat( buffer, "\r\n", sizeof( buffer ));
- ok = Conn_Write(Idx, buffer, len);
- My_Connections[Idx].msg_out++;
- va_end( ap );
- return ok;
- } /* Conn_WriteStr */
- /**
- * Append Data to the outbound write buffer of a connection.
- * @param Idx Index of the connection.
- * @param Data pointer to the data.
- * @param Len length of Data.
- * @return true on success, false otherwise.
- */
- static bool
- Conn_Write( CONN_ID Idx, char *Data, size_t Len )
- {
- CLIENT *c;
- size_t writebuf_limit = WRITEBUFFER_LEN;
- assert( Idx > NONE );
- assert( Data != NULL );
- assert( Len > 0 );
- c = Conn_GetClient(Idx);
- assert( c != NULL);
- /* Servers do get special write buffer limits, so they can generate
- * all the messages that are required while peering. */
- if (Client_Type(c) == CLIENT_SERVER)
- writebuf_limit = WRITEBUFFER_SLINK_LEN;
- /* Is the socket still open? A previous call to Conn_Write()
- * may have closed the connection due to a fatal error.
- * In this case it is sufficient to return an error, as well. */
- if( My_Connections[Idx].sock <= NONE ) {
- LogDebug("Skipped write on closed socket (connection %d).", Idx);
- return false;
- }
- #ifdef ZLIB
- if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
- /* Compressed link:
- * Zip_Buffer() does all the dirty work for us: it flushes
- * the (pre-)compression buffers if required and handles
- * all error conditions. */
- if (!Zip_Buffer(Idx, Data, Len))
- return false;
- }
- else
- #endif
- {
- /* Uncompressed link:
- * Check if outbound buffer has enough space for the data. */
- if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
- writebuf_limit) {
- /* Buffer is full, flush it. Handle_Write deals with
- * low-level errors, if any. */
- if (!Handle_Write(Idx))
- return false;
- }
- /* When the write buffer is still too big after flushing it,
- * the connection will be killed. */
- if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
- writebuf_limit) {
- Log(LOG_NOTICE,
- "Write buffer overflow (connection %d, size %lu byte)!",
- Idx,
- (unsigned long)array_bytes(&My_Connections[Idx].wbuf));
- Conn_Close(Idx, "Write buffer overflow!", NULL, false);
- return false;
- }
- /* Copy data to write buffer */
- if (!array_catb(&My_Connections[Idx].wbuf, Data, Len))
- return false;
- My_Connections[Idx].bytes_out += Len;
- }
- /* Adjust global write counter */
- WCounter += Len;
- return true;
- } /* Conn_Write */
- GLOBAL void
- Conn_Close( CONN_ID Idx, char *LogMsg, char *FwdMsg, bool InformClient )
- {
- /* Close connection. Open pipes of asyncronous resolver
- * sub-processes are closed down. */
- CLIENT *c;
- char *txt;
- double in_k, out_k;
- #ifdef ZLIB
- double in_z_k, out_z_k;
- int in_p, out_p;
- #endif
- assert( Idx > NONE );
- /* Is this link already shutting down? */
- if( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ISCLOSING )) {
- /* Conn_Close() has been called recursively for this link;
- * probabe reason: Handle_Write() failed -- see below. */
- LogDebug("Recursive request to close connection: %d", Idx );
- return;
- }
- assert( My_Connections[Idx].sock > NONE );
- /* Mark link as "closing" */
- Conn_OPTION_ADD( &My_Connections[Idx], CONN_ISCLOSING );
- if (LogMsg)
- txt = LogMsg;
- else
- txt = FwdMsg;
- if (! txt)
- txt = "Reason unknown";
- Log(LOG_INFO, "Shutting down connection %d (%s) with %s:%d ...", Idx,
- LogMsg ? LogMsg : FwdMsg, My_Connections[Idx].host,
- ntohs(My_Connections[Idx].addr.sin_port));
- /* Search client, if any */
- c = Conn_GetClient( Idx );
- /* Should the client be informed? */
- if (InformClient) {
- #ifndef STRICT_RFC
- /* Send statistics to client if registered as user: */
- if ((c != NULL) && (Client_Type(c) == CLIENT_USER)) {
- Conn_WriteStr( Idx,
- ":%s NOTICE %s :%sConnection statistics: client %.1f kb, server %.1f kb.",
- Client_ID(Client_ThisServer()), Client_ID(c),
- NOTICE_TXTPREFIX,
- (double)My_Connections[Idx].bytes_in / 1024,
- (double)My_Connections[Idx].bytes_out / 1024);
- }
- #endif
- /* Send ERROR to client (see RFC!) */
- if (FwdMsg)
- Conn_WriteStr(Idx, "ERROR :%s", FwdMsg);
- else
- Conn_WriteStr(Idx, "ERROR :Closing connection.");
- }
- /* Try to write out the write buffer. Note: Handle_Write() eventually
- * removes the CLIENT structure associated with this connection if an
- * error occurs! So we have to re-check if there is still an valid
- * CLIENT structure after calling Handle_Write() ...*/
- (void)Handle_Write( Idx );
- /* Search client, if any (re-check!) */
- c = Conn_GetClient( Idx );
- /* Shut down socket */
- if (! io_close(My_Connections[Idx].sock)) {
- /* Oops, we can't close the socket!? This is ... ugly! */
- Log(LOG_CRIT,
- "Error closing connection %d (socket %d) with %s:%d - %s! (ignored)",
- Idx, My_Connections[Idx].sock, My_Connections[Idx].host,
- ntohs(My_Connections[Idx].addr.sin_port), strerror(errno));
- }
- /* Mark socket as invalid: */
- My_Connections[Idx].sock = NONE;
- /* If there is still a client, unregister it now */
- if (c)
- Client_Destroy(c, LogMsg, FwdMsg, true);
- /* Calculate statistics and log information */
- in_k = (double)My_Connections[Idx].bytes_in / 1024;
- out_k = (double)My_Connections[Idx].bytes_out / 1024;
- #ifdef ZLIB
- if (Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP)) {
- in_z_k = (double)My_Connections[Idx].zip.bytes_in / 1024;
- out_z_k = (double)My_Connections[Idx].zip.bytes_out / 1024;
- /* Make sure that no division by zero can occur during
- * the calculation of in_p and out_p: in_z_k and out_z_k
- * are non-zero, that's guaranteed by the protocol until
- * compression can be enabled. */
- if (! in_z_k)
- in_z_k = in_k;
- if (! out_z_k)
- out_z_k = out_k;
- in_p = (int)(( in_k * 100 ) / in_z_k );
- out_p = (int)(( out_k * 100 ) / out_z_k );
- Log(LOG_INFO,
- "Connection %d with %s:%d closed (in: %.1fk/%.1fk/%d%%, out: %.1fk/%.1fk/%d%%).",
- Idx, My_Connections[Idx].host,
- ntohs(My_Connections[Idx].addr.sin_port),
- in_k, in_z_k, in_p, out_k, out_z_k, out_p);
- }
- else
- #endif
- {
- Log(LOG_INFO,
- "Connection %d with %s:%d closed (in: %.1fk, out: %.1fk).",
- Idx, My_Connections[Idx].host,
- ntohs(My_Connections[Idx].addr.sin_port),
- in_k, out_k);
- }
- /* cancel running resolver */
- if (Resolve_INPROGRESS(&My_Connections[Idx].res_stat))
- Resolve_Shutdown(&My_Connections[Idx].res_stat);
- /* Servers: Modify time of next connect attempt? */
- Conf_UnsetServer( Idx );
- #ifdef ZLIB
- /* Clean up zlib, if link was compressed */
- if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
- inflateEnd( &My_Connections[Idx].zip.in );
- deflateEnd( &My_Connections[Idx].zip.out );
- array_free(&My_Connections[Idx].zip.rbuf);
- array_free(&My_Connections[Idx].zip.wbuf);
- }
- #endif
- array_free(&My_Connections[Idx].rbuf);
- array_free(&My_Connections[Idx].wbuf);
- /* Clean up connection structure (=free it) */
- Init_Conn_Struct( Idx );
- LogDebug("Shutdown of connection %d completed.", Idx );
- } /* Conn_Close */
- GLOBAL void
- Conn_SyncServerStruct( void )
- {
- /* Synchronize server structures (connection IDs):
- * connections <-> configuration */
- CLIENT *client;
- CONN_ID i;
- int c;
- for( i = 0; i < Pool_Size; i++ ) {
- /* Established connection? */
- if (My_Connections[i].sock < 0)
- continue;
- /* Server connection? */
- client = Conn_GetClient( i );
- if(( ! client ) || ( Client_Type( client ) != CLIENT_SERVER )) continue;
- for( c = 0; c < MAX_SERVERS; c++ )
- {
- /* Configured server? */
- if( ! Conf_Server[c].host[0] ) continue;
- /* Duplicate? */
- if( strcmp( Conf_Server[c].name, Client_ID( client )) == 0 )
- Conf_Server[c].conn_id = i;
- }
- }
- } /* SyncServerStruct */
- /**
- * Send out data of write buffer; connect new sockets.
- */
- static bool
- Handle_Write( CONN_ID Idx )
- {
- ssize_t len;
- size_t wdatalen;
- assert( Idx > NONE );
- if ( My_Connections[Idx].sock < 0 ) {
- LogDebug("Handle_Write() on closed socket, connection %d", Idx);
- return false;
- }
- assert( My_Connections[Idx].sock > NONE );
- wdatalen = array_bytes(&My_Connections[Idx].wbuf );
- #ifdef ZLIB
- if (wdatalen == 0) {
- /* Write buffer is empty, so we try to flush the compression
- * buffer and get some data to work with from there :-) */
- if (!Zip_Flush(Idx))
- return false;
- /* Now the write buffer most probably has changed: */
- wdatalen = array_bytes(&My_Connections[Idx].wbuf);
- }
- #endif
- if (wdatalen == 0) {
- /* Still no data, fine. */
- io_event_del(My_Connections[Idx].sock, IO_WANTWRITE );
- return true;
- }
- LogDebug
- ("Handle_Write() called for connection %d, %ld bytes pending ...",
- Idx, wdatalen);
- len = write(My_Connections[Idx].sock,
- array_start(&My_Connections[Idx].wbuf), wdatalen );
- if( len < 0 ) {
- if (errno == EAGAIN || errno == EINTR)
- return true;
- Log(LOG_ERR, "Write error on connection %d (socket %d): %s!",
- Idx, My_Connections[Idx].sock, strerror(errno));
- Conn_Close(Idx, "Write error!", NULL, false);
- return false;
- }
- /* move any data not yet written to beginning */
- array_moveleft(&My_Connections[Idx].wbuf, 1, (size_t)len);
- return true;
- } /* Handle_Write */
- static int
- New_Connection( int Sock )
- {
- /* Neue Client-Verbindung von Listen-Socket annehmen und
- * CLIENT-Struktur anlegen. */
- #ifdef TCPWRAP
- struct request_info req;
- #endif
- struct sockaddr_in new_addr;
- int new_sock, new_sock_len, new_Pool_Size;
- CLIENT *c;
- long cnt;
- assert( Sock > NONE );
- /* Connection auf Listen-Socket annehmen */
- new_sock_len = (int)sizeof new_addr;
- new_sock = accept(Sock, (struct sockaddr *)&new_addr,
- (socklen_t *)&new_sock_len);
- if (new_sock < 0) {
- Log(LOG_CRIT, "Can't accept connection: %s!", strerror(errno));
- return -1;
- }
- #ifdef TCPWRAP
- /* Validate socket using TCP Wrappers */
- request_init( &req, RQ_DAEMON, PACKAGE_NAME, RQ_FILE, new_sock, RQ_CLIENT_SIN, &new_addr, NULL );
- fromhost(&req);
- if( ! hosts_access( &req ))
- {
- /* Access denied! */
- Log( deny_severity, "Refused connection from %s (by TCP Wrappers)!", inet_ntoa( new_addr.sin_addr ));
- Simple_Message( new_sock, "ERROR :Connection refused" );
- close( new_sock );
- return -1;
- }
- #endif
- /* Socket initialisieren */
- if (!Init_Socket( new_sock ))
- return -1;
-
- /* Check IP-based connection limit */
- cnt = Count_Connections( new_addr );
- if(( Conf_MaxConnectionsIP > 0 ) && ( cnt >= Conf_MaxConnectionsIP ))
- {
- /* Access denied, too many connections from this IP address! */
- Log( LOG_ERR, "Refused connection from %s: too may connections (%ld) from this IP address!", inet_ntoa( new_addr.sin_addr ), cnt);
- Simple_Message( new_sock, "ERROR :Connection refused, too many connections from your IP address!" );
- close( new_sock );
- return -1;
- }
- if( new_sock >= Pool_Size ) {
- new_Pool_Size = new_sock + 1;
- /* No free Connection Structures, check if we may accept further connections */
- if ((( Conf_MaxConnections > 0) && Pool_Size >= Conf_MaxConnections) ||
- (new_Pool_Size < Pool_Size))
- {
- Log( LOG_ALERT, "Can't accept connection: limit (%d) reached!", Pool_Size );
- Simple_Message( new_sock, "ERROR :Connection limit reached" );
- close( new_sock );
- return -1;
- }
- if (!array_alloc(&My_ConnArray, sizeof(CONNECTION),
- (size_t)new_sock)) {
- Log( LOG_EMERG, "Can't allocate memory! [New_Connection]" );
- Simple_Message( new_sock, "ERROR: Internal error" );
- close( new_sock );
- return -1;
- }
- LogDebug("Bumped connection pool to %ld items (internal: %ld items, %ld bytes)",
- new_sock, array_length(&My_ConnArray, sizeof(CONNECTION)), array_bytes(&My_ConnArray));
- /* Adjust pointer to new block */
- My_Connections = array_start(&My_ConnArray);
- while (Pool_Size < new_Pool_Size)
- Init_Conn_Struct(Pool_Size++);
- }
- /* register callback */
- if (!io_event_create( new_sock, IO_WANTREAD, cb_clientserver)) {
- Log(LOG_ALERT, "Can't accept connection: io_event_create failed!");
- Simple_Message(new_sock, "ERROR :Internal error");
- close(new_sock);
- return -1;
- }
- c = Client_NewLocal( new_sock, inet_ntoa( new_addr.sin_addr ), CLIENT_UNKNOWN, false );
- if( ! c ) {
- Log(LOG_ALERT, "Can't accept connection: can't create client structure!");
- Simple_Message(new_sock, "ERROR :Internal error");
- io_close(new_sock);
- return -1;
- }
- Init_Conn_Struct( new_sock );
- My_Connections[new_sock].sock = new_sock;
- My_Connections[new_sock].addr = new_addr;
- My_Connections[new_sock].client = c;
- Log( LOG_INFO, "Accepted connection %d from %s:%d on socket %d.", new_sock,
- inet_ntoa( new_addr.sin_addr ), ntohs( new_addr.sin_port), Sock );
- /* Hostnamen ermitteln */
- strlcpy( My_Connections[new_sock].host, inet_ntoa( new_addr.sin_addr ),
- sizeof( My_Connections[new_sock].host ));
- Client_SetHostname( c, My_Connections[new_sock].host );
- Resolve_Addr(&My_Connections[new_sock].res_stat, &new_addr,
- My_Connections[new_sock].sock, cb_Read_Resolver_Result);
- /* Penalty-Zeit setzen */
- Conn_SetPenalty( new_sock, 4 );
- return new_sock;
- } /* New_Connection */
- static CONN_ID
- Socket2Index( int Sock )
- {
- /* zum Socket passende Connection suchen */
- assert( Sock >= 0 );
- if( Sock >= Pool_Size || My_Connections[Sock].sock != Sock ) {
- /* die Connection wurde vermutlich (wegen eines
- * Fehlers) bereits wieder abgebaut ... */
- LogDebug("Socket2Index: can't get connection for socket %d!", Sock);
- return NONE;
- }
- return Sock;
- } /* Socket2Index */
- /**
- * Read data from the network to the read buffer. If an error occures,
- * the socket of this connection will be shut down.
- */
- static void
- Read_Request( CONN_ID Idx )
- {
- ssize_t len;
- char readbuf[READBUFFER_LEN];
- CLIENT *c;
- assert( Idx > NONE );
- assert( My_Connections[Idx].sock > NONE );
- #ifdef ZLIB
- if ((array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN) ||
- (array_bytes(&My_Connections[Idx].zip.rbuf) >= READBUFFER_LEN))
- #else
- if (array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN)
- #endif
- {
- /* Read buffer is full */
- Log(LOG_ERR,
- "Receive buffer overflow (connection %d): %d bytes!",
- Idx, array_bytes(&My_Connections[Idx].rbuf));
- Conn_Close( Idx, "Receive buffer overflow!", NULL, false );
- return;
- }
- len = read(My_Connections[Idx].sock, readbuf, sizeof(readbuf));
- if (len == 0) {
- Log(LOG_INFO, "%s:%d (%s) is closing the connection ...",
- My_Connections[Idx].host,
- ntohs(My_Connections[Idx].addr.sin_port),
- inet_ntoa( My_Connections[Idx].addr.sin_addr));
- Conn_Close(Idx,
- "Socket closed!", "Client closed connection",
- false);
- return;
- }
- if (len < 0) {
- if( errno == EAGAIN ) return;
- Log(LOG_ERR, "Read error on connection %d (socket %d): %s!",
- Idx, My_Connections[Idx].sock, strerror(errno));
- Conn_Close(Idx, "Read error!", "Client closed connection",
- false);
- return;
- }
- #ifdef ZLIB
- if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
- if (!array_catb(&My_Connections[Idx].zip.rbuf, readbuf,
- (size_t) len)) {
- Log(LOG_ERR,
- "Could not append recieved data to zip input buffer (connn %d): %d bytes!",
- Idx, len);
- Conn_Close(Idx, "Receive buffer overflow!", NULL,
- false);
- return;
- }
- } else
- #endif
- {
- if (!array_catb( &My_Connections[Idx].rbuf, readbuf, len)) {
- Log( LOG_ERR, "Could not append recieved data to input buffer (connn %d): %d bytes!", Idx, len );
- Conn_Close( Idx, "Receive buffer overflow!", NULL, false );
- }
- }
- /* Update connection statistics */
- My_Connections[Idx].bytes_in += len;
- /* Update timestamp of last data received if this connection is
- * registered as a user, server or service connection. Don't update
- * otherwise, so users have at least Conf_PongTimeout seconds time to
- * register with the IRC server -- see Check_Connections().
- * Set "lastping", too, so we can handle time shifts backwards ... */
- c = Conn_GetClient(Idx);
- if (c && (Client_Type(c) == CLIENT_USER
- || Client_Type(c) == CLIENT_SERVER
- || Client_Type(c) == CLIENT_SERVICE)) {
- My_Connections[Idx].lastdata = time(NULL);
- My_Connections[Idx].lastping = My_Connections[Idx].lastdata;
- }
- /* Look at the data in the (read-) buffer of this connection */
- Handle_Buffer(Idx);
- } /* Read_Request */
- static bool
- Handle_Buffer( CONN_ID Idx )
- {
- /* Handle Data in Connections Read-Buffer.
- * Return true if a reuqest was handled, false otherwise (also returned on errors). */
- #ifndef STRICT_RFC
- char *ptr1, *ptr2;
- #endif
- char *ptr;
- size_t len, delta;
- bool result;
- time_t starttime;
- #ifdef ZLIB
- bool old_z;
- #endif
- starttime = time(NULL);
- result = false;
- for (;;) {
- /* Check penalty */
- if( My_Connections[Idx].delaytime > starttime) return result;
- #ifdef ZLIB
- /* unpack compressed data */
- if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP ))
- if( ! Unzip_Buffer( Idx )) return false;
- #endif
- if (0 == array_bytes(&My_Connections[Idx].rbuf))
- break;
- if (!array_cat0_temporary(&My_Connections[Idx].rbuf)) /* make sure buf is NULL terminated */
- return false;
- /* A Complete Request end with CR+LF, see RFC 2812. */
- ptr = strstr( array_start(&My_Connections[Idx].rbuf), "\r\n" );
- if( ptr ) delta = 2; /* complete request */
- #ifndef STRICT_RFC
- else {
- /* Check for non-RFC-compliant request (only CR or LF)? Unfortunately,
- * there are quite a few clients that do this (incl. "mIRC" :-( */
- ptr1 = strchr( array_start(&My_Connections[Idx].rbuf), '\r' );
- ptr2 = strchr( array_start(&My_Connections[Idx].rbuf), '\n' );
- delta = 1;
- if( ptr1 && ptr2 ) ptr = ptr1 > ptr2 ? ptr2 : ptr1;
- else if( ptr1 ) ptr = ptr1;
- else if( ptr2 ) ptr = ptr2;
- }
- #endif
- if( ! ptr )
- break;
- /* End of request found */
- *ptr = '\0';
- len = ( ptr - (char*) array_start(&My_Connections[Idx].rbuf)) + delta;
- if( len > ( COMMAND_LEN - 1 )) {
- /* Request must not exceed 512 chars (incl. CR+LF!), see
- * RFC 2812. Disconnect Client if this happens. */
- Log( LOG_ERR, "Request too long (connection %d): %d bytes (max. %d expected)!",
- Idx, array_bytes(&My_Connections[Idx].rbuf), COMMAND_LEN - 1 );
- Conn_Close( Idx, NULL, "Request too long", true );
- return false;
- }
- if (len <= 2) { /* request was empty (only '\r\n') */
- array_moveleft(&My_Connections[Idx].rbuf, 1, delta); /* delta is either 1 or 2 */
- break;
- }
- #ifdef ZLIB
- /* remember if stream is already compressed */
- old_z = My_Connections[Idx].options & CONN_ZIP;
- #endif
- My_Connections[Idx].msg_in++;
- if (!Parse_Request(Idx, (char*)array_start(&My_Connections[Idx].rbuf) ))
- return false;
- result = true;
- array_moveleft(&My_Connections[Idx].rbuf, 1, len);
- LogDebug("Connection %d: %d bytes left in read buffer.",
- Idx, array_bytes(&My_Connections[Idx].rbuf));
- #ifdef ZLIB
- if(( ! old_z ) && ( My_Connections[Idx].options & CONN_ZIP ) &&
- ( array_bytes(&My_Connections[Idx].rbuf) > 0 ))
- {
- /* The last Command activated Socket-Compression.
- * Data that was read after that needs to be copied to Unzip-buf
- * for decompression */
- if (!array_copy( &My_Connections[Idx].zip.rbuf, &My_Connections[Idx].rbuf ))
- return false;
- array_trunc(&My_Connections[Idx].rbuf);
- LogDebug("Moved already received data (%u bytes) to uncompression buffer.",
- array_bytes(&My_Connections[Idx].zip.rbuf));
- }
- #endif /* ZLIB */
- }
- return result;
- } /* Handle_Buffer */
- static void
- Check_Connections(void)
- {
- /* check if connections are alive. if not, play PING-PONG first.
- * if this doesn't help either, disconnect client. */
- CLIENT *c;
- CONN_ID i;
- for (i = 0; i < Pool_Size; i++) {
- if (My_Connections[i].sock < 0)
- continue;
- c = Conn_GetClient(i);
- if (c && ((Client_Type(c) == CLIENT_USER)
- || (Client_Type(c) == CLIENT_SERVER)
- || (Client_Type(c) == CLIENT_SERVICE))) {
- /* connected User, Server or Service */
- if (My_Connections[i].lastping >
- My_Connections[i].lastdata) {
- /* We already sent a ping */
- if (My_Connections[i].lastping <
- time(NULL) - Conf_PongTimeout) {
- /* Timeout */
- LogDebug
- ("Connection %d: Ping timeout: %d seconds.",
- i, Conf_PongTimeout);
- Conn_Close(i, NULL, "Ping timeout",
- true);
- }
- } else if (My_Connections[i].lastdata <
- time(NULL) - Conf_PingTimeout) {
- /* We need to send a PING ... */
- LogDebug("Connection %d: sending PING ...", i);
- My_Connections[i].lastping = time(NULL);
- Conn_WriteStr(i, "PING :%s",
- Client_ID(Client_ThisServer()));
- }
- } else {
- /* The connection is not fully established yet, so
- * we don't do the PING-PONG game here but instead
- * disconnect the client after "a short time" if it's
- * still not registered. */
- if (My_Connections[i].lastdata <
- time(NULL) - Conf_PongTimeout) {
- LogDebug
- ("Unregistered connection %d timed out ...",
- i);
- Conn_Close(i, NULL, "Timeout", false);
- }
- }
- }
- } /* Check_Connections */
- static void
- Check_Servers( void )
- {
- /* Check if we can establish further server links */
- int i, n;
- time_t time_now;
- /* Check all configured servers */
- for( i = 0; i < MAX_SERVERS; i++ ) {
- /* Valid outgoing server which isn't already connected or disabled? */
- if(( ! Conf_Server[i].host[0] ) || ( ! Conf_Server[i].port > 0 ) ||
- ( Conf_Server[i].conn_id > NONE ) || ( Conf_Server[i].flags & CONF_SFLAG_DISABLED ))
- continue;
- /* Is there already a connection in this group? */
- if( Conf_Server[i].group > NONE ) {
- for (n = 0; n < MAX_SERVERS; n++) {
- if (n == i) continue;
- if ((Conf_Server[n].conn_id > NONE) &&
- (Conf_Server[n].group == Conf_Server[i].group))
- break;
- }
- if (n < MAX_SERVERS) continue;
- }
- /* Check last connect attempt? */
- time_now = time(NULL);
- if( Conf_Server[i].lasttry > (time_now - Conf_ConnectRetry))
- continue;
- /* Okay, try to connect now */
- Conf_Server[i].lasttry = time_now;
- assert(Resolve_Getfd(&Conf_Server[i].res_stat) < 0);
- Resolve_Name(&Conf_Server[i].res_stat, Conf_Server[i].host, cb_Connect_to_Server);
- }
- } /* Check_Servers */
- static void
- New_Server( int Server )
- {
- /* Establish new server link */
- struct sockaddr_in new_addr;
- struct in_addr inaddr;
- int res, new_sock;
- CLIENT *c;
- assert( Server > NONE );
- Log( LOG_INFO, "Establishing connection to \"%s\", %s, port %d ... ", Conf_Server[Server].host,
- Conf_Server[Server].ip, Conf_Server[Server].port );
- #ifdef HAVE_INET_ATON
- if( inet_aton( Conf_Server[Server].ip, &inaddr ) == 0 )
- #else
- memset( &inaddr, 0, sizeof( inaddr ));
- inaddr.s_addr = inet_addr( Conf_Server[Server].ip );
- if( inaddr.s_addr == (unsigned)-1 )
- #endif
- {
- Log( LOG_ERR, "Can't connect to \"%s\": can't convert ip address %s!",
- Conf_Server[Server].host, Conf_Server[Server].ip );
- return;
- }
- memset( &new_addr, 0, sizeof( new_addr ));
- new_addr.sin_family = (sa_family_t)AF_INET;
- new_addr.sin_addr = inaddr;
- new_addr.sin_port = htons( Conf_Server[Server].port );
- new_sock = socket( PF_INET, SOCK_STREAM, 0 );
- if ( new_sock < 0 ) {
- Log( LOG_CRIT, "Can't create socket: %s!", strerror( errno ));
- return;
- }
- if( ! Init_Socket( new_sock )) return;
- res = connect(new_sock, (struct sockaddr *)&new_addr,
- (socklen_t)sizeof(new_addr));
- if(( res != 0 ) && ( errno != EINPROGRESS )) {
- Log( LOG_CRIT, "Can't connect socket: %s!", strerror( errno ));
- close( new_sock );
- return;
- }
-
- if (!array_alloc(&My_ConnArray, sizeof(CONNECTION), (size_t)new_sock)) {
- Log(LOG_ALERT,
- "Cannot allocate memory for server connection (socket %d)",
- new_sock);
- close( new_sock );
- return;
- }
- My_Connections = array_start(&My_ConnArray);
- assert(My_Connections[new_sock].sock <= 0);
- Init_Conn_Struct(new_sock);
- c = Client_NewLocal( new_sock, inet_ntoa( new_addr.sin_addr ), CLIENT_UNKNOWNSERVER, false );
- if( ! c ) {
- Log( LOG_ALERT, "Can't establish connection: can't create client structure!" );
- close( new_sock );
- return;
- }
- Client_SetIntroducer( c, c );
- Client_SetToken( c, TOKEN_OUTBOUND );
- /* Register connection */
- Conf_Server[Server].conn_id = new_sock;
- My_Connections[new_sock].sock = new_sock;
- My_Connections[new_sock].addr = new_addr;
- My_Connections[new_sock].client = c;
- strlcpy( My_Connections[new_sock].host, Conf_Server[Server].host,
- sizeof(My_Connections[new_sock].host ));
- /* Register new socket */
- if (!io_event_create( new_sock, IO_WANTWRITE, cb_connserver)) {
- Log( LOG_ALERT, "io_event_create(): could not add fd %d", strerror(errno));
- Conn_Close( new_sock, "io_event_create() failed", NULL, false );
- Init_Conn_Struct( new_sock );
- Conf_Server[Server].conn_id = NONE;
- }
- LogDebug("Registered new connection %d on socket %d.",
- new_sock, My_Connections[new_sock].sock );
- Conn_OPTION_ADD( &My_Connections[new_sock], CONN_ISCONNECTING );
- } /* New_Server */
- static void
- Init_Conn_Struct( CONN_ID Idx )
- {
- time_t now = time( NULL );
- /* Connection-Struktur initialisieren */
- memset( &My_Connections[Idx], 0, sizeof ( CONNECTION ));
- My_Connections[Idx].sock = -1;
- My_Connections[Idx].lastdata = now;
- My_Connections[Idx].lastprivmsg = now;
- Resolve_Init(&My_Connections[Idx].res_stat);
- } /* Init_Conn_Struct */
- static bool
- Init_Socket( int Sock )
- {
- /* Initialize socket (set options) */
- int value;
- if (!io_setnonblock(Sock)) {
- Log( LOG_CRIT, "Can't enable non-blocking mode for socket: %s!", strerror( errno ));
- close( Sock );
- return false;
- }
- /* Don't block this port after socket shutdown */
- value = 1;
- if( setsockopt( Sock, SOL_SOCKET, SO_REUSEADDR, &value, (socklen_t)sizeof( value )) != 0 )
- {
- Log( LOG_ERR, "Can't set socket option SO_REUSEADDR: %s!", strerror( errno ));
- /* ignore this error */
- }
- /* Set type of service (TOS) */
- #if defined(IP_TOS) && defined(IPTOS_LOWDELAY)
- value = IPTOS_LOWDELAY;
- LogDebug("Setting option IP_TOS on socket %d to IPTOS_LOWDELAY (%d).", Sock, value );
- if( setsockopt( Sock, SOL_IP, IP_TOS, &value, (socklen_t)sizeof( value )) != 0 )
- {
- Log( LOG_ERR, "Can't set socket option IP_TOS: %s!", strerror( errno ));
- /* ignore this error */
- }
- #endif
- return true;
- } /* Init_Socket */
- static void
- cb_Connect_to_Server(int fd, UNUSED short events)
- {
- /* Read result of resolver sub-process from pipe and start connection */
- int i;
- size_t len;
- char readbuf[HOST_LEN + 1];
- LogDebug("Resolver: Got forward lookup callback on fd %d, events %d", fd, events);
- for (i=0; i < MAX_SERVERS; i++) {
- if (Resolve_Getfd(&Conf_Server[i].res_stat) == fd )
- break;
- }
-
- if( i >= MAX_SERVERS) {
- /* Ops, no matching server found?! */
- io_close( fd );
- LogDebug("Resolver: Got Forward Lookup callback for unknown server!?");
- return;
- }
- /* Read result from pipe */
- len = Resolve_Read(&Conf_Server[i].res_stat, readbuf, sizeof readbuf -1);
- if (len == 0)
- return;
-
- readbuf[len] = '\0';
- LogDebug("Got result from resolver: \"%s\" (%u bytes read).", readbuf, len);
- strlcpy( Conf_Server[i].ip, readbuf, sizeof( Conf_Server[i].ip ));
- /* connect() */
- New_Server(i);
- } /* cb_Read_Forward_Lookup */
- static void
- cb_Read_Resolver_Result( int r_fd, UNUSED short events )
- {
- /* Read result of resolver sub-process from pipe and update the
- * apropriate connection/client structure(s): hostname and/or
- * IDENT user name.*/
- CLIENT *c;
- int i;
- size_t len;
- char *identptr;
- #ifdef IDENTAUTH
- char readbuf[HOST_LEN + 2 + CLIENT_USER_LEN];
- #else
- char readbuf[HOST_LEN + 1];
- #endif
- LogDebug("Resolver: Got callback on fd %d, events %d", r_fd, events );
- /* Search associated connection ... */
- for( i = 0; i < Pool_Size; i++ ) {
- if(( My_Connections[i].sock != NONE )
- && ( Resolve_Getfd(&My_Connections[i].res_stat) == r_fd ))
- break;
- }
- if( i >= Pool_Size ) {
- /* Ops, none found? Probably the connection has already
- * been closed!? We'll ignore that ... */
- io_close( r_fd );
- LogDebug("Resolver: Got callback for unknown connection!?");
- return;
- }
- /* Read result from pipe */
- len = Resolve_Read(&My_Connections[i].res_stat, readbuf, sizeof readbuf -1);
- if (len == 0)
- return;
- readbuf[len] = '\0';
- identptr = strchr(readbuf, '\n');
- assert(identptr != NULL);
- if (!identptr) {
- Log( LOG_CRIT, "Resolver: Got malformed result!");
- return;
- }
- *identptr = '\0';
- LogDebug("Got result from resolver: \"%s\" (%u bytes read).", readbuf, len);
- /* Okay, we got a complete result: this is a host name for outgoing
- * connections and a host name and IDENT user name (if enabled) for
- * incoming connections.*/
- assert ( My_Connections[i].sock >= 0 );
- /* Incoming connection. Search client ... */
- c = Conn_GetClient( i );
- assert( c != NULL );
- /* Only update client information of unregistered clients */
- if( Client_Type( c ) == CLIENT_UNKNOWN ) {
- strlcpy(My_Connections[i].host, readbuf, sizeof( My_Connections[i].host));
- Client_SetHostname( c, readbuf);
- #ifdef IDENTAUTH
- ++identptr;
- if (*identptr) {
- Log( LOG_INFO, "IDENT lookup for connection %ld: \"%s\".", i, identptr);
- Client_SetUser( c, identptr, true );
- } else {
- Log( LOG_INFO, "IDENT lookup for connection %ld: no result.", i );
- }
- #endif
- }
- #ifdef DEBUG
- else Log( LOG_DEBUG, "Resolver: discarding result for already registered connection %d.", i );
- #endif
- /* Reset penalty time */
- Conn_ResetPenalty( i );
- } /* cb_Read_Resolver_Result */
- static void
- Simple_Message( int Sock, const char *Msg )
- {
- char buf[COMMAND_LEN];
- size_t len;
- /* Write "simple" message to socket, without using compression
- * or even the connection write buffers. Used e.g. for error
- * messages by New_Connection(). */
- assert( Sock > NONE );
- assert( Msg != NULL );
- strlcpy( buf, Msg, sizeof buf - 2);
- len = strlcat( buf, "\r\n", sizeof buf);
- (void)write(Sock, buf, len);
- } /* Simple_Error */
- static int
- Count_Connections( struct sockaddr_in addr_in )
- {
- int i, cnt;
-
- cnt = 0;
- for( i = 0; i < Pool_Size; i++ ) {
- if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].addr.sin_addr.s_addr == addr_in.sin_addr.s_addr )) cnt++;
- }
- return cnt;
- } /* Count_Connections */
- GLOBAL CLIENT *
- Conn_GetClient( CONN_ID Idx )
- {
- /* return Client-Structure that belongs to the local Connection Idx.
- * If none is found, return NULL.
- */
- CONNECTION *c;
- assert( Idx >= 0 );
- c = array_get(&My_ConnArray, sizeof (CONNECTION), (size_t)Idx);
- assert(c != NULL);
- return c ? c->client : NULL;
- }
- /* -eof- */
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