/*
* ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001-2010 Alexander Barton <alex@barton.de>
+ * Copyright (c)2001-2012 Alexander Barton (alex@barton.de) and Contributors.
*
* 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
*/
+#undef DEBUG_BUFFER
#define CONN_MODULE
#include "conf-ssl.h"
#include "io.h"
+/**
+ * @file
+ * Connection management
+ */
+
#include "imp.h"
#include <assert.h>
#ifdef PROTOTYPES
#include "ngircd.h"
#include "array.h"
#include "client.h"
+#include "class.h"
#include "conf.h"
#include "conn-ssl.h"
#include "conn-zip.h"
#include "resolve.h"
#include "tool.h"
-#ifdef ZEROCONF
-# include "rendezvous.h"
-#endif
-
#include "exp.h"
#define SERVER_WAIT (NONE - 1)
#define MAX_COMMANDS 3
-#define MAX_COMMANDS_SERVER 10
+#define MAX_COMMANDS_SERVER_MIN 10
+#define MAX_COMMANDS_SERVICE 10
static bool Handle_Write PARAMS(( CONN_ID Idx ));
/**
* IO callback for listening sockets: handle new connections. This callback
* gets called when a new non-SSL connection should be accepted.
- * @param sock Socket descriptor
- * @param irrelevant (ignored IO specification)
+ *
+ * @param sock Socket descriptor.
+ * @param irrelevant (ignored IO specification)
*/
static void
cb_listen(int sock, short irrelevant)
/**
* IO callback for listening SSL sockets: handle new connections. This callback
* gets called when a new SSL-enabled connection should be accepted.
- * @param sock Socket descriptor
- * @param irrelevant (ignored IO specification)
+ *
+ * @param sock Socket descriptor.
+ * @param irrelevant (ignored IO specification)
*/
static void
cb_listen_ssl(int sock, short irrelevant)
/**
* IO callback for new outgoing non-SSL server connections.
- * @param sock Socket descriptor
- * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...)
+ *
+ * @param sock Socket descriptor.
+ * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...).
*/
static void
cb_connserver(int sock, UNUSED short what)
if (ng_ipaddr_af(&Conf_Server[server].dst_addr[0])) {
/* more addresses to try... */
- New_Server(res, &Conf_Server[server].dst_addr[0]);
+ New_Server(server, &Conf_Server[server].dst_addr[0]);
/* connection to dst_addr[0] is now in progress, so
* remove this address... */
Conf_Server[server].dst_addr[0] =
/**
* Login to a remote server.
- * @param idx Connection index
+ *
+ * @param idx Connection index.
*/
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 );
+ Log(LOG_INFO,
+ "Connection %d (socket %d) with \"%s:%d\" established. Now logging in ...",
+ idx, My_Connections[idx].sock, 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);
#ifdef SSL_SUPPORT
/**
* IO callback for new outgoing SSL-enabled server connections.
- * @param sock Socket descriptor
- * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...)
+ *
+ * @param sock Socket descriptor.
+ * @param unused (ignored IO specification)
*/
static void
cb_connserver_login_ssl(int sock, short unused)
/**
* IO callback for established non-SSL client and server connections.
- * @param sock Socket descriptor
- * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...)
+ *
+ * @param sock Socket descriptor.
+ * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...).
*/
static void
cb_clientserver(int sock, short what)
#ifdef SSL_SUPPORT
/**
* IO callback for established SSL-enabled client and server connections.
- * @param sock Socket descriptor
- * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...)
+ *
+ * @param sock Socket descriptor.
+ * @param what IO specification (IO_WANTREAD/IO_WANTWRITE/...).
*/
static void
cb_clientserver_ssl(int sock, short what)
/**
- * Initialite connecion module.
+ * Initialize connecion module.
*/
GLOBAL void
Conn_Init( void )
} /* Conn_Exit */
+/**
+ * Close all sockets (file descriptors) of open connections.
+ * This is useful in forked child processes, for example, to make sure that
+ * they don't hold connections open that the main process wants to close.
+ */
+GLOBAL void
+Conn_CloseAllSockets(int ExceptOf)
+{
+ CONN_ID idx;
+
+ for(idx = 0; idx < Pool_Size; idx++) {
+ if(My_Connections[idx].sock > NONE &&
+ My_Connections[idx].sock != ExceptOf)
+ close(My_Connections[idx].sock);
+ }
+}
+
+
+/**
+ * Initialize listening ports.
+ *
+ * @param a Array containing the ports the daemon should listen on.
+ * @param listen_addr Address the socket should listen on (can be "0.0.0.0").
+ * @param func IO callback function to register.
+ * @returns Number of listening sockets created.
+ */
static unsigned int
ports_initlisteners(array *a, const char *listen_addr, void (*func)(int,short))
{
/**
* Initialize all listening sockets.
- * @return Number of created listening sockets
+ *
+ * @returns Number of created listening sockets
*/
GLOBAL unsigned int
Conn_InitListeners( void )
unsigned int created = 0;
char *copy, *listen_addr;
- if (!io_library_init(CONNECTION_POOL)) {
- Log(LOG_EMERG, "Cannot initialize IO routines: %s", strerror(errno));
- return -1;
- }
-
assert(Conf_ListenAddress);
/* can't use Conf_ListenAddress directly, see below */
} /* Conn_InitListeners */
+/**
+ * Shut down all listening sockets.
+ */
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,
} /* Conn_ExitListeners */
+/**
+ * Bind a socket to a specific (source) address.
+ *
+ * @param addr Address structure.
+ * @param listen_addrstr Source address as string.
+ * @param Port Port number.
+ * @returns true on success, false otherwise.
+ */
static bool
InitSinaddrListenAddr(ng_ipaddr_t *addr, const char *listen_addrstr, UINT16 Port)
{
}
+/**
+ * Set a socket to "IPv6 only". If the given socket doesn't belong to the
+ * AF_INET6 family, or the operating system doesn't support this functionality,
+ * this function retruns silently.
+ *
+ * @param af Address family of the socket.
+ * @param sock Socket handle.
+ */
static void
set_v6_only(int af, int sock)
{
}
-/* return new listening port file descriptor or -1 on failure */
+/**
+ * Initialize new listening port.
+ *
+ * @param listen_addr Local address to bind the socet to (can be 0.0.0.0).
+ * @param Port Port number on which the new socket should be listening.
+ * @returns file descriptor of the socket or -1 on failure.
+ */
static int
NewListener(const char *listen_addr, UINT16 Port)
{
/* Create new listening socket on specified port */
ng_ipaddr_t addr;
int sock, af;
-#ifdef ZEROCONF
- char name[CLIENT_ID_LEN], *info;
-#endif
+
if (!InitSinaddrListenAddr(&addr, listen_addr, Port))
return -1;
return -1;
}
- Log(LOG_INFO, "Now listening on [%s]:%d (socket %d).", ng_ipaddr_tostr(&addr), 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
+ Log(LOG_INFO, "Now listening on [%s]:%d (socket %d).",
+ ng_ipaddr_tostr(&addr), Port, sock);
return sock;
} /* NewListener */
#ifdef SSL_SUPPORT
-/*
+
+/**
+ * Check if SSL library needs to read SSL-protocol related data.
+ *
* SSL/TLS connections require extra treatment:
* When either CONN_SSL_WANT_WRITE or CONN_SSL_WANT_READ is set, we
* need to take care of that first, before checking read/write buffers.
* If this function returns true, such a condition is met and we have
* to reverse the condition (check for read even if we've data to write,
* do not check for read but writeability even if write-buffer is empty).
+ *
+ * @param c Connection to check.
+ * @returns true if SSL-library has to read protocol data.
*/
static bool
SSL_WantRead(const CONNECTION *c)
}
return false;
}
+
+/**
+ * Check if SSL library needs to write SSL-protocol related data.
+ *
+ * Please see description of SSL_WantRead() for full description!
+ *
+ * @param c Connection to check.
+ * @returns true if SSL-library has to write protocol data.
+ */
static bool
SSL_WantWrite(const CONNECTION *c)
{
}
return false;
}
+
#else
+
static inline bool
-SSL_WantRead(UNUSED const CONNECTION *c) { return false; }
+SSL_WantRead(UNUSED const CONNECTION *c)
+{ return false; }
+
static inline bool
-SSL_WantWrite(UNUSED const CONNECTION *c) { return false; }
+SSL_WantWrite(UNUSED const CONNECTION *c)
+{ return false; }
+
#endif
/**
* "Main Loop": Loop until shutdown or restart is signalled.
+ *
* This function loops until a shutdown or restart of ngIRCd is signalled and
* calls io_dispatch() to check for readable and writable sockets every second.
* It checks for status changes on pending connections (e. g. when a hostname
while (!NGIRCd_SignalQuit && !NGIRCd_SignalRestart) {
t = time(NULL);
-#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();
+ /* Expire outdated class/list items */
+ Class_Expire();
+
/* Look for non-empty read buffers ... */
for (i = 0; i < Pool_Size; i++) {
if ((My_Connections[i].sock > NONE)
/**
* 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.
+ *
+ * @param Idx Index fo the connection.
+ * @param Format Format string, see printf().
+ * @returns true on success, false otherwise.
*/
#ifdef PROTOTYPES
GLOBAL bool
return ok;
} /* Conn_WriteStr */
+GLOBAL char*
+Conn_Password( CONN_ID Idx )
+{
+ assert( Idx > NONE );
+ if (My_Connections[Idx].pwd == NULL)
+ return (char*)"\0";
+ else
+ return My_Connections[Idx].pwd;
+} /* Conn_Password */
+
+GLOBAL void
+Conn_SetPassword( CONN_ID Idx, const char *Pwd )
+{
+ assert( Idx > NONE );
+
+ if (My_Connections[Idx].pwd)
+ free(My_Connections[Idx].pwd);
+
+ My_Connections[Idx].pwd = strdup(Pwd);
+ if (My_Connections[Idx].pwd == NULL) {
+ Log(LOG_EMERG, "Can't allocate memory! [Conn_SetPassword]");
+ exit(1);
+ }
+} /* Conn_SetPassword */
/**
* 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.
+ *
+ * @param Idx Index of the connection.
+ * @param Data pointer to the data.
+ * @param Len length of Data.
+ * @returns 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;
+ size_t writebuf_limit = WRITEBUFFER_MAX_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 ) {
+ if (My_Connections[Idx].sock <= NONE) {
LogDebug("Skipped write on closed socket (connection %d).", Idx);
return false;
}
+ /* Make sure that there still exists a CLIENT structure associated
+ * with this connection and check if this is a server or not: */
+ c = Conn_GetClient(Idx);
+ if (c) {
+ /* 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;
+ } else
+ LogDebug("Write on socket without client (connection %d)!?", Idx);
+
#ifdef ZLIB
if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
/* Compressed link:
/* Uncompressed link:
* Check if outbound buffer has enough space for the data. */
if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
- writebuf_limit) {
+ WRITEBUFFER_FLUSH_LEN) {
/* Buffer is full, flush it. Handle_Write deals with
* low-level errors, if any. */
if (!Handle_Write(Idx))
if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
writebuf_limit) {
Log(LOG_NOTICE,
- "Write buffer overflow (connection %d, size %lu byte)!",
- Idx,
+ "Write buffer space exhausted (connection %d, limit is %lu bytes, %lu bytes new, %lu bytes pending)",
+ Idx, writebuf_limit, Len,
(unsigned long)array_bytes(&My_Connections[Idx].wbuf));
- Conn_Close(Idx, "Write buffer overflow!", NULL, false);
+ Conn_Close(Idx, "Write buffer space exhausted", NULL, false);
return false;
}
} /* Conn_Write */
+/**
+ * Shut down a connection.
+ *
+ * @param Idx Connection index.
+ * @param LogMsg Message to write to the log or NULL. If no LogMsg
+ * is given, the FwdMsg is logged.
+ * @param FwdMsg Message to forward to remote servers.
+ * @param InformClient If true, inform the client on the connection which is
+ * to be shut down of the reason (FwdMsg) and send
+ * connection statistics before disconnecting it.
+ */
GLOBAL void
Conn_Close( CONN_ID Idx, const char *LogMsg, const char *FwdMsg, bool InformClient )
{
- /* Close connection. Open pipes of asyncronous resolver
+ /* Close connection. Open pipes of asynchronous resolver
* sub-processes are closed down. */
CLIENT *c;
if (FwdMsg)
Conn_WriteStr(Idx, "ERROR :%s", FwdMsg);
else
- Conn_WriteStr(Idx, "ERROR :Closing connection.");
+ Conn_WriteStr(Idx, "ERROR :Closing connection");
}
/* Try to write out the write buffer. Note: Handle_Write() eventually
in_k, out_k);
}
- /* Kill possibly running subprocess */
- if (Proc_InProgress(&My_Connections[Idx].proc_stat))
- Proc_Kill(&My_Connections[Idx].proc_stat);
-
/* Servers: Modify time of next connect attempt? */
Conf_UnsetServer( Idx );
array_free(&My_Connections[Idx].rbuf);
array_free(&My_Connections[Idx].wbuf);
+ if (My_Connections[Idx].pwd != NULL)
+ free(My_Connections[Idx].pwd);
/* Clean up connection structure (=free it) */
Init_Conn_Struct( Idx );
} /* Conn_Close */
+/**
+ * Get current number of connections.
+ *
+ * @returns Number of current connections.
+ */
GLOBAL long
Conn_Count(void)
{
} /* Conn_Count */
+/**
+ * Get number of maximum simultaneous connections.
+ *
+ * @returns Number of maximum simultaneous connections.
+ */
GLOBAL long
Conn_CountMax(void)
{
} /* Conn_CountMax */
+/**
+ * Get number of connections accepted since the daemon startet.
+ *
+ * @returns Number of connections accepted.
+ */
GLOBAL long
Conn_CountAccepted(void)
{
} /* Conn_CountAccepted */
+/**
+ * Synchronize established connections and configured server structures
+ * after a configuration update and store the correct connection IDs, if any.
+ */
GLOBAL void
-Conn_SyncServerStruct( 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)
+ for (i = 0; i < Pool_Size; i++) {
+ if (My_Connections[i].sock == NONE)
continue;
- /* Server connection? */
- client = Conn_GetClient( i );
- if(( ! client ) || ( Client_Type( client ) != CLIENT_SERVER )) continue;
+ /* Server link? */
+ client = Conn_GetClient(i);
+ if (!client || Client_Type(client) != CLIENT_SERVER)
+ continue;
- for( c = 0; c < MAX_SERVERS; c++ )
- {
+ for (c = 0; c < MAX_SERVERS; c++) {
/* Configured server? */
- if( ! Conf_Server[c].host[0] ) continue;
+ if (!Conf_Server[c].host[0])
+ continue;
- /* Duplicate? */
- if( strcmp( Conf_Server[c].name, Client_ID( client )) == 0 )
+ if (strcasecmp(Conf_Server[c].name, Client_ID(client)) == 0)
Conf_Server[c].conn_id = i;
}
}
} /* SyncServerStruct */
+/**
+ * Get IP address string of a connection.
+ *
+ * @param Idx Connection index.
+ * @return Pointer to a global buffer containing the IP address as string.
+ */
+GLOBAL const char *
+Conn_GetIPAInfo(CONN_ID Idx)
+{
+ assert(Idx > NONE);
+ return ng_ipaddr_tostr(&My_Connections[Idx].addr);
+}
+
+
/**
* Send out data of write buffer; connect new sockets.
+ *
+ * @param Idx Connection index.
+ * @returns true on success, false otherwise.
*/
static bool
Handle_Write( CONN_ID Idx )
return true;
}
+#ifdef DEBUG_BUFFER
LogDebug
("Handle_Write() called for connection %d, %ld bytes pending ...",
Idx, wdatalen);
+#endif
#ifdef SSL_SUPPORT
if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_SSL )) {
} /* Handle_Write */
+/**
+ * Count established connections to a specific IP address.
+ *
+ * @returns Number of established connections.
+ */
static int
Count_Connections(ng_ipaddr_t *a)
{
/**
* Initialize new client connection on a listening socket.
- * @param Sock Listening socket descriptor
- * @return Accepted socket descriptor or -1 on error
+ *
+ * @param Sock Listening socket descriptor.
+ * @returns Accepted socket descriptor or -1 on error.
*/
static int
New_Connection(int Sock)
assert(Sock > NONE);
+ LogDebug("Accepting new connection on socket %d ...", Sock);
+
new_sock_len = (int)sizeof(new_addr);
new_sock = accept(Sock, (struct sockaddr *)&new_addr,
(socklen_t *)&new_sock_len);
"Refused connection from %s: too may connections (%ld) from this IP address!",
ip_str, cnt);
Simple_Message(new_sock,
- "ERROR :Connection refused, too many connections from your IP address!");
+ "ERROR :Connection refused, too many connections from your IP address");
close(new_sock);
return -1;
}
return -1;
}
- c = Client_NewLocal(new_sock, ip_str, CLIENT_UNKNOWN, false);
+ c = Client_NewLocal(new_sock, NULL, CLIENT_UNKNOWN, false);
if (!c) {
Log(LOG_ALERT,
"Can't accept connection: can't create client structure!");
identsock = new_sock;
#ifdef IDENTAUTH
- if (Conf_NoIdent)
+ if (!Conf_Ident)
identsock = -1;
#endif
- if (!Conf_NoDNS)
+ if (Conf_DNS) {
+ if (Conf_NoticeAuth) {
+#ifdef IDENTAUTH
+ if (Conf_Ident)
+ (void)Conn_WriteStr(new_sock,
+ "NOTICE AUTH :*** Looking up your hostname and checking ident");
+ else
+#endif
+ (void)Conn_WriteStr(new_sock,
+ "NOTICE AUTH :*** Looking up your hostname");
+ (void)Handle_Write(new_sock);
+ }
Resolve_Addr(&My_Connections[new_sock].proc_stat, &new_addr,
identsock, cb_Read_Resolver_Result);
+ }
Account_Connection();
return new_sock;
} /* New_Connection */
+/**
+ * Update global connection counters.
+ */
static void
Account_Connection(void)
{
} /* Account_Connection */
+/**
+ * Translate socket handle into connection index.
+ *
+ * @param Sock Socket handle.
+ * @returns Connecion index or NONE, if no connection could be found.
+ */
static CONN_ID
Socket2Index( int Sock )
{
/**
* Read data from the network to the read buffer. If an error occures,
* the socket of this connection will be shut down.
+ *
+ * @param Idx Connection index.
*/
static void
Read_Request( CONN_ID Idx )
{
/* Read buffer is full */
Log(LOG_ERR,
- "Receive buffer overflow (connection %d): %d bytes!",
+ "Receive buffer space exhausted (connection %d): %d bytes",
Idx, array_bytes(&My_Connections[Idx].rbuf));
- Conn_Close( Idx, "Receive buffer overflow!", NULL, false );
+ Conn_Close(Idx, "Receive buffer space exhausted", NULL, false);
return;
}
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!",
+ "Could not append received data to zip input buffer (connection %d): %d bytes!",
Idx, len);
- Conn_Close(Idx, "Receive buffer overflow!", NULL,
+ Conn_Close(Idx, "Receive buffer space exhausted", NULL,
false);
return;
}
#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 );
+ Log(LOG_ERR,
+ "Could not append received data to input buffer (connection %d): %d bytes!",
+ Idx, len);
+ Conn_Close(Idx, "Receive buffer space exhausted", NULL, false );
}
}
/* Update connection statistics */
My_Connections[Idx].bytes_in += len;
+ My_Connections[Idx].bps += Handle_Buffer(Idx);
+
+ /* Make sure that there is still a valid client registered */
+ c = Conn_GetClient(Idx);
+ if (!c)
+ return;
/* 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)) {
+ * Update "lastping", too, if time shifted backwards ... */
+ if (Client_Type(c) == CLIENT_USER
+ || Client_Type(c) == CLIENT_SERVER
+ || Client_Type(c) == CLIENT_SERVICE) {
t = time(NULL);
if (My_Connections[Idx].lastdata != t)
My_Connections[Idx].bps = 0;
My_Connections[Idx].lastdata = t;
- My_Connections[Idx].lastping = My_Connections[Idx].lastdata;
+ if (My_Connections[Idx].lastping > t)
+ My_Connections[Idx].lastping = t;
}
/* Look at the data in the (read-) buffer of this connection */
- My_Connections[Idx].bps += Handle_Buffer(Idx);
if (Client_Type(c) != CLIENT_SERVER
+ && Client_Type(c) != CLIENT_UNKNOWNSERVER
+ && Client_Type(c) != CLIENT_SERVICE
&& My_Connections[Idx].bps >= maxbps) {
LogDebug("Throttling connection %d: BPS exceeded! (%u >= %u)",
Idx, My_Connections[Idx].bps, maxbps);
/**
* Handle all data in the connection read-buffer.
+ *
* Data is processed until no complete command is left in the read buffer,
- * or MAX_COMMANDS[_SERVER] commands were processed.
+ * or MAX_COMMANDS[_SERVER|_SERVICE] commands were processed.
* When a fatal error occurs, the connection is shut down.
- * @param Idx Index of the connection.
- * @return number of bytes processed.
+ *
+ * @param Idx Index of the connection.
+ * @returns Number of bytes processed.
*/
static unsigned int
Handle_Buffer(CONN_ID Idx)
CLIENT *c;
c = Conn_GetClient(Idx);
- assert( c != NULL);
+ starttime = time(NULL);
- /* Servers do get special command limits, so they can process
- * all the messages that are required while peering. */
- if (Client_Type(c) == CLIENT_SERVER)
- maxcmd = MAX_COMMANDS_SERVER;
+ assert(c != NULL);
+
+ /* Servers get special command limits that depend on the user count */
+ switch (Client_Type(c)) {
+ case CLIENT_SERVER:
+ maxcmd = (int)(Client_UserCount() / 5)
+ + MAX_COMMANDS_SERVER_MIN;
+ /* Allow servers to handle even more commands while peering
+ * to speed up server login and network synchronisation. */
+ if (Conn_LastPing(Idx) == 0)
+ maxcmd *= 5;
+ break;
+ case CLIENT_SERVICE:
+ maxcmd = MAX_COMMANDS_SERVICE; break;
+ }
- starttime = time(NULL);
for (i=0; i < maxcmd; i++) {
/* Check penalty */
if (My_Connections[Idx].delaytime > starttime)
return 0; /* error -> connection has been closed */
array_moveleft(&My_Connections[Idx].rbuf, 1, len);
+#ifdef DEBUG_BUFFER
LogDebug("Connection %d: %d bytes left in read buffer.",
Idx, array_bytes(&My_Connections[Idx].rbuf));
+#endif
#ifdef ZLIB
if ((!old_z) && (My_Connections[Idx].options & CONN_ZIP) &&
(array_bytes(&My_Connections[Idx].rbuf) > 0)) {
} /* Handle_Buffer */
+/**
+ * Check whether established connections are still alive or not.
+ * If not, play PING-PONG first; and if that doesn't help either,
+ * disconnect the respective peer.
+ */
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;
char msg[64];
if (My_Connections[i].lastping <
time(NULL) - Conf_PongTimeout) {
/* Timeout */
- LogDebug
- ("Connection %d: Ping timeout: %d seconds.",
- i, Conf_PongTimeout);
- snprintf(msg, sizeof(msg), "Ping timeout: %d seconds", Conf_PongTimeout);
+ snprintf(msg, sizeof(msg),
+ "Ping timeout: %d seconds",
+ Conf_PongTimeout);
+ LogDebug("Connection %d: %s.", i, msg);
Conn_Close(i, NULL, msg, 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_UpdatePing(i);
Conn_WriteStr(i, "PING :%s",
Client_ID(Client_ThisServer()));
}
} /* Check_Connections */
+/**
+ * Check if further server links should be established.
+ */
static void
-Check_Servers( void )
+Check_Servers(void)
{
- /* Check if we can establish further server links */
-
int i, n;
time_t time_now;
+ time_now = time(NULL);
+
/* 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;
+ for (i = 0; i < MAX_SERVERS; i++) {
+ if (Conf_Server[i].conn_id != NONE)
+ continue; /* Already establishing or connected */
+ if (!Conf_Server[i].host[0] || !Conf_Server[i].port > 0)
+ continue; /* No host and/or port configured */
+ if (Conf_Server[i].flags & CONF_SFLAG_DISABLED)
+ continue; /* Disabled configuration entry */
+ if (Conf_Server[i].lasttry > (time_now - Conf_ConnectRetry))
+ continue; /* We have to wait a little bit ... */
/* Is there already a connection in this group? */
- if( Conf_Server[i].group > NONE ) {
+ if (Conf_Server[i].group > NONE) {
for (n = 0; n < MAX_SERVERS; n++) {
- if (n == i) continue;
+ if (n == i)
+ continue;
if ((Conf_Server[n].conn_id != NONE) &&
- (Conf_Server[n].group == Conf_Server[i].group))
- break;
+ (Conf_Server[n].group == Conf_Server[i].group))
+ break;
}
- if (n < MAX_SERVERS) continue;
+ 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 */
+ Log(LOG_NOTICE,
+ "Preparing to establish a new server link for \"%s\" ...",
+ Conf_Server[i].name);
Conf_Server[i].lasttry = time_now;
Conf_Server[i].conn_id = SERVER_WAIT;
assert(Proc_GetPipeFd(&Conf_Server[i].res_stat) < 0);
- Resolve_Name(&Conf_Server[i].res_stat, Conf_Server[i].host, cb_Connect_to_Server);
+ Resolve_Name(&Conf_Server[i].res_stat, Conf_Server[i].host,
+ cb_Connect_to_Server);
}
} /* Check_Servers */
+/**
+ * Establish a new outgoing server connection.
+ *
+ * @param Server Configuration index of the server.
+ * @param dest Destination IP address to connect to.
+ */
static void
New_Server( int Server , ng_ipaddr_t *dest)
{
assert( Server > NONE );
+ /* Make sure that the remote server hasn't re-linked to this server
+ * asynchronously on its own */
+ if (Conf_Server[Server].conn_id > NONE) {
+ Log(LOG_INFO,
+ "Connection to \"%s\" meanwhile re-established, aborting preparation.");
+ return;
+ }
+
if (!ng_ipaddr_tostr_r(dest, ip_str)) {
Log(LOG_WARNING, "New_Server: Could not convert IP to string");
return;
}
- Log( LOG_INFO, "Establishing connection to \"%s\", %s, port %d ... ",
- Conf_Server[Server].host, ip_str, Conf_Server[Server].port );
-
af_dest = ng_ipaddr_af(dest);
new_sock = socket(af_dest, SOCK_STREAM, 0);
+
+ Log(LOG_INFO,
+ "Establishing connection for \"%s\" to \"%s:%d\" (%s), socket %d ...",
+ Conf_Server[Server].name, Conf_Server[Server].host,
+ Conf_Server[Server].port, ip_str, new_sock);
+
if (new_sock < 0) {
- Log( LOG_CRIT, "Can't create socket (af %d) : %s!", af_dest, strerror( errno ));
+ Log(LOG_CRIT, "Can't create socket (af %d): %s!",
+ af_dest, strerror(errno));
return;
}
return;
}
+ if (!io_event_create( new_sock, IO_WANTWRITE, cb_connserver)) {
+ Log(LOG_ALERT, "io_event_create(): could not add fd %d", strerror(errno));
+ close(new_sock);
+ return;
+ }
+
My_Connections = array_start(&My_ConnArray);
assert(My_Connections[new_sock].sock <= 0);
c = Client_NewLocal(new_sock, ip_str, CLIENT_UNKNOWNSERVER, false);
if (!c) {
Log( LOG_ALERT, "Can't establish connection: can't create client structure!" );
- close( new_sock );
+ io_close(new_sock);
return;
}
Client_SetToken( c, TOKEN_OUTBOUND );
/* Register connection */
- Conf_Server[Server].conn_id = new_sock;
+ Conf_SetServer(Server, new_sock);
My_Connections[new_sock].sock = new_sock;
My_Connections[new_sock].addr = *dest;
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;
- }
#ifdef SSL_SUPPORT
if (Conf_Server[Server].SSLConnect && !ConnSSL_PrepareConnect( &My_Connections[new_sock],
&Conf_Server[Server] ))
/**
* Initialize connection structure.
+ *
+ * @param Idx Connection index.
*/
static void
Init_Conn_Struct(CONN_ID Idx)
} /* Init_Conn_Struct */
+/**
+ * Initialize options of a new socket.
+ *
+ * For example, we try to set socket options SO_REUSEADDR and IPTOS_LOWDELAY.
+ * The socket is automatically closed if a fatal error is encountered.
+ *
+ * @param Sock Socket handle.
+ * @returns false if socket was closed due to fatal error.
+ */
static bool
Init_Socket( int Sock )
{
- /* Initialize socket (set options) */
-
int value;
if (!io_setnonblock(Sock)) {
/* Set type of service (TOS) */
#if defined(IPPROTO_IP) && defined(IPTOS_LOWDELAY)
value = IPTOS_LOWDELAY;
- LogDebug("Setting IP_TOS on socket %d to IPTOS_LOWDELAY.", Sock);
if (setsockopt(Sock, IPPROTO_IP, IP_TOS, &value,
(socklen_t) sizeof(value))) {
- Log(LOG_ERR, "Can't set socket option IP_TOS: %s!",
- strerror(errno));
+ LogDebug("Can't set socket option IP_TOS: %s!",
+ strerror(errno));
/* ignore this error */
- }
+ } else
+ LogDebug("IP_TOS on socket %d has been set to IPTOS_LOWDELAY.",
+ Sock);
#endif
return true;
} /* Init_Socket */
+/**
+ * Read results of a resolver sub-process and try to initiate a new server
+ * connection.
+ *
+ * @param fd File descriptor of the pipe to the sub-process.
+ * @param events (ignored IO specification)
+ */
static void
cb_Connect_to_Server(int fd, UNUSED short events)
{
/* Read result from pipe */
len = Proc_Read(&Conf_Server[i].res_stat, dest_addrs, sizeof(dest_addrs));
- if (len == 0)
+ Proc_Close(&Conf_Server[i].res_stat);
+ if (len == 0) {
+ /* Error resolving hostname: reset server structure */
+ Conf_Server[i].conn_id = NONE;
return;
+ }
assert((len % sizeof(ng_ipaddr_t)) == 0);
} /* cb_Read_Forward_Lookup */
+/**
+ * Read results of a resolver sub-process from the pipe and update the
+ * apropriate connection/client structure(s): hostname and/or IDENT user name.
+ *
+ * @param r_fd File descriptor of the pipe to the sub-process.
+ * @param events (ignored IO specification)
+ */
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;
CONN_ID i;
size_t len;
char *identptr;
#ifdef IDENTAUTH
char readbuf[HOST_LEN + 2 + CLIENT_USER_LEN];
+ char *ptr;
#else
char readbuf[HOST_LEN + 1];
#endif
/* Read result from pipe */
len = Proc_Read(&My_Connections[i].proc_stat, readbuf, sizeof readbuf -1);
+ Proc_Close(&My_Connections[i].proc_stat);
if (len == 0)
return;
strlcpy(My_Connections[i].host, readbuf,
sizeof(My_Connections[i].host));
Client_SetHostname(c, readbuf);
+ if (Conf_NoticeAuth)
+ (void)Conn_WriteStr(i,
+ "NOTICE AUTH :*** Found your hostname: %s",
+ My_Connections[i].host);
#ifdef IDENTAUTH
++identptr;
if (*identptr) {
- Log(LOG_INFO, "IDENT lookup for connection %d: \"%s\".", i, identptr);
- Client_SetUser(c, identptr, true);
+ ptr = identptr;
+ while (*ptr) {
+ if ((*ptr < '0' || *ptr > '9') &&
+ (*ptr < 'A' || *ptr > 'Z') &&
+ (*ptr < 'a' || *ptr > 'z'))
+ break;
+ ptr++;
+ }
+ if (*ptr) {
+ /* Erroneous IDENT reply */
+ Log(LOG_NOTICE,
+ "Got invalid IDENT reply for connection %d! Ignored.",
+ i);
+ } else {
+ Log(LOG_INFO,
+ "IDENT lookup for connection %d: \"%s\".",
+ i, identptr);
+ Client_SetUser(c, identptr, true);
+ }
+ if (Conf_NoticeAuth) {
+ (void)Conn_WriteStr(i,
+ "NOTICE AUTH :*** Got %sident response%s%s",
+ *ptr ? "invalid " : "",
+ *ptr ? "" : ": ",
+ *ptr ? "" : identptr);
+ }
} else {
Log(LOG_INFO, "IDENT lookup for connection %d: no result.", i);
+ if (Conf_NoticeAuth && Conf_Ident)
+ (void)Conn_WriteStr(i,
+ "NOTICE AUTH :*** No ident response");
}
#endif
+
+ if (Conf_NoticeAuth)
+ (void)Handle_Write(i);
+
+ Class_HandleServerBans(c);
}
#ifdef DEBUG
else Log( LOG_DEBUG, "Resolver: discarding result for already registered connection %d.", i );
/**
* Write a "simple" (error) message to a socket.
+ *
* The message is sent without using the connection write buffers, without
* compression/encryption, and even without any error reporting. It is
- * designed for error messages of e.g. New_Connection(). */
+ * designed for error messages of e.g. New_Connection().
+ *
+ * @param Sock Socket handle.
+ * @param Msg Message string to send.
+ */
static void
Simple_Message(int Sock, const char *Msg)
{
* Get CLIENT structure that belongs to a local connection identified by its
* index number. Each connection belongs to a client by definition, so it is
* not required that the caller checks for NULL return values.
- * @param Idx Connection index number
- * @return Pointer to CLIENT structure
+ *
+ * @param Idx Connection index number.
+ * @returns Pointer to CLIENT structure.
*/
GLOBAL CLIENT *
Conn_GetClient( CONN_ID Idx )
/**
* Get PROC_STAT sub-process structure of a connection.
- * @param Idx Connection index number
- * @return PROC_STAT structure
+ *
+ * @param Idx Connection index number.
+ * @returns PROC_STAT structure.
*/
GLOBAL PROC_STAT *
Conn_GetProcStat(CONN_ID Idx)
/**
* Get CONN_ID from file descriptor associated to a subprocess structure.
- * @param fd File descriptor
- * @return CONN_ID or NONE (-1)
+ *
+ * @param fd File descriptor.
+ * @returns CONN_ID or NONE (-1).
*/
GLOBAL CONN_ID
Conn_GetFromProc(int fd)
} /* Conn_GetFromProc */
+#ifndef STRICT_RFC
+
+GLOBAL long
+Conn_GetAuthPing(CONN_ID Idx)
+{
+ assert (Idx != NONE);
+ return My_Connections[Idx].auth_ping;
+} /* Conn_GetAuthPing */
+
+GLOBAL void
+Conn_SetAuthPing(CONN_ID Idx, long ID)
+{
+ assert (Idx != NONE);
+ My_Connections[Idx].auth_ping = ID;
+} /* Conn_SetAuthPing */
+
+#endif
+
+
#ifdef SSL_SUPPORT
/**
* Get information about used SSL chiper.
- * @param Idx Connection index number
- * @param buf Buffer for returned information text
- * @param len Size of return buffer "buf"
- * @return true on success, false otherwise
+ *
+ * @param Idx Connection index number.
+ * @param buf Buffer for returned information text.
+ * @param len Size of return buffer "buf".
+ * @returns true on success, false otherwise.
*/
GLOBAL bool
Conn_GetCipherInfo(CONN_ID Idx, char *buf, size_t len)
/**
* Check if a connection is SSL-enabled or not.
- * @param Idx Connection index number
- * @return true if connection is SSL-enabled, false otherwise.
+ *
+ * @param Idx Connection index number.
+ * @return true if connection is SSL-enabled, false otherwise.
*/
GLOBAL bool
Conn_UsesSSL(CONN_ID Idx)
#endif
+#ifdef DEBUG
+
+/**
+ * Dump internal state of the "connection module".
+ */
+GLOBAL void
+Conn_DebugDump(void)
+{
+ int i;
+
+ Log(LOG_DEBUG, "Connection status:");
+ for (i = 0; i < Pool_Size; i++) {
+ if (My_Connections[i].sock == NONE)
+ continue;
+ Log(LOG_DEBUG,
+ " - %d: host=%s, lastdata=%ld, lastping=%ld, delaytime=%ld, flag=%d, options=%d, bps=%d, client=%s",
+ My_Connections[i].sock, My_Connections[i].host,
+ My_Connections[i].lastdata, My_Connections[i].lastping,
+ My_Connections[i].delaytime, My_Connections[i].flag,
+ My_Connections[i].options, My_Connections[i].bps,
+ My_Connections[i].client ? Client_ID(My_Connections[i].client) : "-");
+ }
+} /* Conn_DumpClients */
+
+#endif
+
+
/* -eof- */
projects / ngircd-alex.git / blobdiff