/*
* ----------------------------------------------------------------
* Night Light IRC Proxy - Client I/O Functions
* ----------------------------------------------------------------
* Copyright (C) 1997-2007 Jonas Kvinge <jonas@night-light.net>
* All rights reserved.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Last modified by:
* Jonas Kvinge (24.11.2007)
*
*/
#define CLIENT_IO_C
#define NEED_SYS_TYPES_H 1 /* Extra types */
#define NEED_SYS_PARAM_H 1 /* Some systems need this */
#define NEED_LIMITS_H 0 /* Kernel limits */
#define NEED_STDARG_H 1 /* va_list, etc */
#define NEED_ERRNO_H 1 /* errno */
#define NEED_CTYPE_H 0 /* isdigit(), etc */
#define NEED_NETINET_IN_H 1 /* in_addr, sockaddr_in, etc */
#define NEED_ARPA_INET_H 1 /* inet_ntoa(), inet_aton(), etc */
#define NEED_STDIO_H 1 /* Standard C UNIX functions */
#define NEED_STDLIB_H 1 /* malloc(), exit(), atoi(), etc */
#define NEED_TIME_H 1 /* time(), etc */
#define NEED_SYSCTL_H 0 /* sysctl(), etc */
#define NEED_SYS_STAT_H 0 /* chmod(), mkdir(), etc */
#define NEED_SYS_UIO_H 0 /* iovec, etc */
#define NEED_FCNTL_H 1 /* open(), creat(), fcntl(), etc */
#define NEED_SYS_IOCTL_H 0 /* ioctl(), etc */
#define NEED_SYS_FILIO_H 0 /* Solaris need this for ioctl(), etc */
#define NEED_UNISTD_H 1 /* Unix standard functions */
#define NEED_STRING_H 1 /* C string functions */
#define NEED_SIGNAL_H 0 /* Signal functions */
#define NEED_SYS_SOCKET_H 1 /* Socket functions */
#define NEED_NETDB_H 1 /* Network database functions */
#define NEED_ARPA_NAMESER_H 0 /* Nameserver definitions */
#define NEED_GETUSERPW_HEADERS 0 /* Functions to retrive system passwords */
#define NEED_ARES 1 /* Functions needed for ares */
#define NEED_SSL 1 /* Needed for SSL support */
#include "includes.h"
#include "irc.h"
#include "client.h"
#include "client_io.h"
#if SSL_SUPPORT
#include "client_io_ssl.h"
#endif /* SSL_SUPPORT */
#include "client_connection.h"
#include "client_parser.h"
#include "client_auth.h"
/* VARIABLES - JONAS (31.07.2001) */
extern struct Client_Struct *Client_Head;
/* CLIENT_FDS FUNCTION - JONAS (22.07.2001) */
void client_fds(fd_set *ReadFDS, fd_set *WriteFDS, unsigned long int *FDS) {
struct Client_Struct *ClientS = NULL;
struct Client_Struct *ClientS_DEL = NULL;
time_t Duration = 0;
for (ClientS = Client_Head ; ClientS != NULL ;) {
if ((Host_IsResolved(ClientS->ResolveFlags)) && (Client_IsSocket(ClientS))) {
if (Client_IsVerified(ClientS)) {
if (Client_IsSentPing(ClientS)) {
Duration = (NOW - ClientS->SentPingTime);
if (Duration >= CLIENT_PINGTIMEOUT) { client_close(ClientS, "No response from client in %s, closing connection to client.", strduration(Duration)); }
}
else {
Duration = (NOW - ClientS->LastRecvTime);
if (Duration >= CLIENT_IDLETIMEBEFOREPING) {
ClientS->SentPingTime = NOW;
Client_SetSentPing(ClientS);
client_addsend(ClientS, "PING :ircproxy");
}
}
}
else {
Duration = (NOW - ClientS->Time);
if (Duration >= CLIENT_VERIFYTIMEOUT) { client_close(ClientS, "No response from client in %s while waiting for PASS/NICK/USER, closing connection to client.", strduration(Duration)); }
}
}
if (Client_IsSentError(ClientS)) {
Duration = (NOW - ClientS->SentErrorTime);
if (Duration >= CLIENT_ERRORTIMEOUT) { client_cleanup(ClientS, "Disconnecting client %s (%s): Timeout while closing connection.", ClientS->HostName, ClientS->HostIPS); }
}
if ((Client_IsSocket(ClientS)) && (Host_IsResolved(ClientS->ResolveFlags))) {
FD_SET(ClientS->FD, ReadFDS);
if (ClientS->SendBuffer != NULL) { FD_SET(ClientS->FD, WriteFDS); }
}
if ((!Client_IsSocket(ClientS)) && (!Host_IsResolving(ClientS->ResolveFlags))) {
ClientS_DEL = ClientS;
ClientS = ClientS->Next;
client_rem(ClientS_DEL);
continue;
}
ClientS = ClientS->Next;
}
}
/* CLIENT_IO FUNCTION - JONAS (01.07.2000) */
void client_io(fd_set *ReadFDS, fd_set *WriteFDS, unsigned long int *FDS) {
struct Client_Struct *ClientS = NULL;
for (ClientS = Client_Head ; ClientS != NULL ; ClientS = ClientS->Next) {
assert(*FDS >= 0);
if (*FDS <= 0) { return; }
if (Client_IsSocket(ClientS)) {
if (FD_ISSET(ClientS->FD, ReadFDS)) { *FDS = *FDS - 1; }
if (FD_ISSET(ClientS->FD, WriteFDS)) { *FDS = *FDS - 1; }
}
if (Client_IsSocket(ClientS)) {
if (FD_ISSET(ClientS->FD, ReadFDS)) {
#if SSL_SUPPORT
if (Client_IsSSL(ClientS)) { client_recv_ssl(ClientS); }
else {
#endif /* SSL_SUPPORT */
client_recv(ClientS);
#if SSL_SUPPORT
}
#endif /* SSL_SUPPORT */
}
}
if (Client_IsSocket(ClientS)) {
if (FD_ISSET(ClientS->FD, WriteFDS)) {
#if SSL_SUPPORT
if (Client_IsSSL(ClientS)) { client_send_ssl(ClientS); }
else {
#endif /* SSL_SUPPORT */
client_send(ClientS);
#if SSL_SUPPORT
}
#endif /* SSL_SUPPORT */
}
}
}
}
/* CLIENT_RECV FUNCTION - JONAS (01.07.2000) */
void client_recv(struct Client_Struct *ClientS) {
signed long int Result = 0;
unsigned long int OldLen = 0;
unsigned long int NewLen = 0;
char RecvBuffer[RECVBUFFERLEN+1] = "";
char *RecvBufferPT = NULL;
assert(ClientS != NULL);
ClientS->LastRecvTime = NOW;
do {
memset(&RecvBuffer, 0, sizeof(RecvBuffer));
Result = recv(ClientS->FD, RecvBuffer, RECVBUFFERLEN, MSG_NOSIGNAL);
if (Result <= ERROR) {
if ((errno == EAGAIN) || (errno == EWOULDBLOCK) || (errno == EINTR)) { break; }
client_cleanup(ClientS, "Read error to client %s (%s): [%d] %s", ClientS->HostName, ClientS->HostIPS, errno, strerror(errno));
return;
}
if (Result == 0) {
if (ClientS->RecvBuffer != NULL) { client_parse(ClientS); }
client_cleanup(ClientS, "EOF to client %s (%s).", ClientS->HostName, ClientS->HostIPS);
return;
}
if (ClientS->RecvBuffer == NULL) { OldLen = 0; }
else { OldLen = strlen(ClientS->RecvBuffer); }
NewLen = OldLen + Result + 1;
RecvBufferPT = realloc(ClientS->RecvBuffer, NewLen);
if (RecvBufferPT == NULL) {
client_close(ClientS, "Memory allocation failure: [%d] %s", errno, strerror(errno));
return;
}
ClientS->RecvBuffer = RecvBufferPT;
RecvBufferPT += OldLen;
strcpy(RecvBufferPT, RecvBuffer);
}
while (Result >= RECVBUFFERLEN);
if (Client_IsSentError(ClientS)) { return; }
client_parse(ClientS);
}
/* CLIENT_SEND FUNCTION - JONAS (01.07.2000) */
void client_send(struct Client_Struct *ClientS) {
char *SendBufferPT = NULL;
char SendBuffer[SENDBUFFERLEN+1] = "";
unsigned long int SendLen = 0;
unsigned long int SentLen = 0;
signed long int Result = 0;
assert(ClientS != NULL);
for (SendBufferPT = ClientS->SendBuffer ; *SendBufferPT != '\0' ; SendBufferPT += SentLen) {
SendLen = strlen(SendBufferPT);
if (SendLen > SENDBUFFERLEN) { SendLen = SENDBUFFERLEN; }
memset(&SendBuffer, 0, sizeof(SendBuffer));
strncpy(SendBuffer, SendBufferPT, SendLen);
Result = send(ClientS->FD, SendBufferPT, SendLen, MSG_NOSIGNAL);
if (Result <= ERROR) {
if ((errno == EAGAIN) || (errno == EWOULDBLOCK) || (errno == EINTR) || (errno == ENOMEM) || (errno == ENOBUFS)) {
unsigned long int Len = 0;
sysprint(BITMASK_MAIN, "Write error to client %s (%s): [%d] %s", ClientS->HostName, ClientS->HostIPS, errno, strerror(errno));
/*
* EAGAIN/EWOULDBLOCK - THE SOCKET IMPLEMENTATION CAN'T HANDLE MORE DATA.
* EINTR - INTERRUPTED BY A SIGNAL.
* ENOMEM - NO MEMORY LEFT.
* ENOBUFS - NO BUFFER SPACE AVAILABLE.
*
* COPY WHATS LEFT TO THE THE START OF THE SENDBUFFER, REALLOCATE THE MEMORY AND BAIL OUT - JONAS (01.12.1999)
*
*/
Len = strlen(SendBufferPT) + 1;
memmove(ClientS->SendBuffer, SendBufferPT, Len);
SendBufferPT = realloc(ClientS->SendBuffer, Len);
assert(SendBufferPT != NULL);
ClientS->SendBuffer = SendBufferPT;
return;
}
client_cleanup(ClientS, "Write error to client %s (%s): [%d] %s", ClientS->HostName, ClientS->HostIPS, errno, strerror(errno));
return;
}
SentLen = Result;
assert(SentLen == SendLen);
}
FREE(ClientS->SendBuffer);
if (Client_IsSentError(ClientS)) { client_cleanup(ClientS, "Successfully closed connection to client %s (%s).", ClientS->HostName, ClientS->HostIPS); }
}
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