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add and virtualitemreceiver sources and modified for autoconf build system

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Georg Hopp 15 years ago
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23 changed files with 1111 additions and 727 deletions
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  1. 674
      COPYING
  2. 7
      src/Makefile.am
  3. 27
      src/clientClose.c
  4. 87
      src/clientRead.c
  5. 23
      src/daemonize.c
  6. 104
      src/gameserver.c
  7. 74
      src/handleCmdLine.c
  8. 27
      src/include/appConfig.h
  9. 28
      src/include/client.h
  10. 6
      src/include/daemonize.h
  11. 14
      src/include/monitor.h
  12. 31
      src/include/server.h
  13. 10
      src/include/signalHandling.h
  14. 9
      src/include/socket.h
  15. 109
      src/logRotate.c
  16. 87
      src/monitor.c
  17. 19
      src/po
  18. 43
      src/serverInit.c
  19. 128
      src/serverRun.c
  20. 57
      src/serverShutdown.c
  21. 28
      src/signalHandling.c
  22. 93
      src/socket.c
  23. 153
      src/writeBuffer.c

674
COPYING
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@ -1,674 +0,0 @@
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

7
src/Makefile.am
View File

@ -3,11 +3,14 @@ LIBS = $(INTLLIBS)
PROGS = gameserver PROGS = gameserver
INCLUDES = -I../include
# INCLUDES = -I./include
bin_PROGRAMS = $(PROGS) bin_PROGRAMS = $(PROGS)
gameserver_SOURCES = gameserver.c
gameserver_SOURCES = gameserver.c clientClose.c clientRead.c \
daemonize.c handleCmdLine.c logRotate.c monitor.c \
serverInit.c serverRun.c serverShutdown.c signalHandling.c \
socket.c writeBuffer.c
# install: install-am # install: install-am
# strip -x $(DESTDIR)$(libdir)/libscot.so.0.0.2 # strip -x $(DESTDIR)$(libdir)/libscot.so.0.0.2

27
src/clientClose.c
View File

@ -0,0 +1,27 @@
#include <stdlib.h> /* for free() */
#include <unistd.h> /* for close() */
#include <sys/socket.h> /* for shutdown() */
#include <string.h> /* for memset and stuff */
#include "include/appConfig.h"
#include "include/client.h"
#include "include/monitor.h"
void clientClose(tClient * client)
{
if (0 != verbose) {
syslog(LOG_INFO, "closing socket for %s", client->remoteAddr);
}
/* close socket an remove from fd_set */
shutdown(client->socket, SHUT_RDWR);
close(client->socket);
/* free buffer */
free(client->buffer);
client->buffer = NULL;
client->socket = 0;
client->readPos = 0;
client->bufMult = 0;
memset(client->remoteAddr, 0, 16);
}

87
src/clientRead.c
View File

@ -0,0 +1,87 @@
#include <unistd.h> /* for getopt */
#include <stdlib.h> /* for exit */
#include <string.h> /* for memset and stuff */
#include <errno.h> /* for errno */
#include "include/client.h"
#include "include/monitor.h"
#define GET_MULTIPLIER(size) (((size) - 1) / READBUFSIZE + 1)
int
_clientReallocBuffer(tClient * client, unsigned int newSize)
{
unsigned int newMult = GET_MULTIPLIER(newSize);
if (CLIENTMULTMAX < newMult) {
/* line exceeds maximum line length */
return 0;
}
if (client->bufMult < newMult) {
char * newBuffer = calloc(newMult * READBUFSIZE, sizeof(char));
if (NULL == newBuffer) {
syslogMonitor(LOG_ERR, MON_CRITICAL, "calloc",
"calloc for readbuffer[%s] failed",
client->remoteAddr);
syslogMonitor(LOG_ERR, MON_FAILURE, "calloc",
"calloc for readbuffer[%s] failed - service terminated",
client->remoteAddr);
exit(EXIT_FAILURE);
}
if (NULL != client->buffer) {
memcpy(newBuffer, client->buffer, client->readPos);
free(client->buffer);
}
client->buffer = newBuffer;
client->bufMult = newMult;
}
return newMult;
}
int clientRead(tClient * client)
{
int readSize;
char readBuf[READBUFSIZE];
/*
* initialize values // read data from socket
*/
memset(readBuf, 0, READBUFSIZE);
readSize = read(client->socket, readBuf, READBUFSIZE);
switch (readSize) {
case -1:
syslogMonitor(LOG_WARNING, MON_WARNING, "socket.read",
"read returns -1 for client[%s]: %s - connection closed",
client->remoteAddr, strerror(errno));
break;
case 0:
break;
default:
if (!_clientReallocBuffer(client, client->readPos + readSize)) {
syslogMonitor(LOG_WARNING, MON_WARNING, "data.longline",
"got to long line from client[%s] - connection closed",
client->remoteAddr);
return READ_ERR_LONGLINE;
}
memcpy(client->buffer+client->readPos, readBuf, readSize);
client->readPos += readSize;
break;
}
return readSize;
}

23
src/daemonize.c
View File

@ -0,0 +1,23 @@
#include <stdio.h> /* for printf() and fprintf() */
#include <unistd.h> /* for getopt */
#include <stdlib.h>
void daemonize(void) {
pid_t pid;
if (0 > ((pid = fork()))) {
perror("deamoinze[fork]");
exit(EXIT_FAILURE);
} else if (0 != pid) {
exit(EXIT_SUCCESS);
}
/* make new child session leader */
setsid();
/* connect all standard streams to /dev/null */
freopen("/dev/null", "w", stderr);
freopen("/dev/null", "r", stdin);
freopen("/dev/null", "w", stdout);
}

104
src/gameserver.c
View File

@ -1,54 +1,56 @@
/***************************************************************************
*
* gameserver.c: This is a gameserver....more to come
*
* Copyright (C) 2009 Georg Steffers <georg@steffers.org>
* This file is part of gameserver
*
* gameserver 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 3 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, see <http://www.gnu.org/licenses/>.
*
* Author: Georg Steffers (gst), georg@steffers.org
*
* Version: 0.0
* Created: 16.08.2009 18:52:57
* Revision: none
*
***************************************************************************/
/* #### HEADER FILE INCLUDES ######################################### */
#include <stdio.h>
#include <stdlib.h>
/* #### MACROS - LOCAL TO THIS SOURCE FILE ######################### */
/* #### TYPE DEFINITIONS - LOCAL TO THIS SOURCE FILE ############### */
/* #### DATA TYPES - LOCAL TO THIS SOURCE FILE ##################### */
/* #### VARIABLES - LOCAL TO THIS SOURCE FILE ###################### */
/* #### PROTOTYPES - LOCAL TO THIS SOURCE FILE ##################### */
/* #### FUNCTION DEFINITIONS - EXPORTED FUNCTIONS ################## */
/* #### FUNCTION DEFINITIONS - LOCAL TO THIS SOURCE FILE ########### */
#include <string.h> /* for memset and stuff */
#include <syslog.h> /* for logging */
#include "include/server.h"
#include "include/monitor.h"
#include "include/signalHandling.h"
#include "include/appConfig.h"
#include "include/daemonize.h"
/* some global configurations */
/* TODO: make this whole stuff work without these globals */
unsigned char verbose;
unsigned char doGzip;
int int
main ( int argc, char *argv[] )
main(int argc, char *argv[])
{ {
printf ( "Hello World\n" );
return EXIT_SUCCESS;
} /* ---------- end of function main ---------- */
tVirtualItemServer server;
tAppConfig appConfig = {
0, // no verbose
0, // no daemon
0, // no gzip
MAXPENDING,
DEFAULTPORT,
DEFAULTPATH,
LOGNAMEPATTERN
};
memset(&server, 0, sizeof(server));
handleCmdLine(&appConfig, argc, argv);
verbose = appConfig.verbose;
doGzip = appConfig.doGzip;
/* decouple procss from controlling shell and make it session leader */
if (appConfig.doDaemon) {
daemonize();
}
init_signals();
openlog(argv[0], LOG_PID, LOG_USER);
syslogMonitor(LOG_INFO, MON_INFO, "startup", "service started");
serverInit(
&server,
appConfig.port,
appConfig.maxPending,
appConfig.logPath,
appConfig.namePat);
serverRun(&server);
serverShutdown(&server);
return 0;
}

74
src/handleCmdLine.c
View File

@ -0,0 +1,74 @@
#include <unistd.h> /* for getopt */
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "include/appConfig.h"
int
handleCmdLine(tAppConfig * config, int argc, char *argv[])
{
int opt;
while ((opt = getopt(argc, argv, "Dvgp:l:n:b:")) != -1) {
switch (opt) {
case 'p':
/* port */
config->port = atoi(optarg);
break;
case 'l':
/* logPath */
strncpy(config->logPath, optarg, sizeof(config->logPath)-1);
break;
case 'n':
/* logNamePattern */
strncpy(config->namePat, optarg, sizeof(config->namePat)-1);
break;
case 'b':
/* maxPending (connection backlog) */
config->maxPending = atoi(optarg);
break;
case 'v':
/* verbose */
config->verbose = 1;
break;
case 'g':
/* do gzip of data */
config->doGzip = 1;
break;
case 'D':
/* verbose */
config->doDaemon = 1;
break;
default:
/* '?' */
fprintf(
stderr,
"Usage: %s [-p port] [-l logPath] [-n logNamePattern] [-c maxClient] [-b backlog] [-v] [-D]\n"
"Defaults:\n"
"\t%-20s: port this service will use [%d]\n"
"\t%-20s: path where the logfiles will be stored [%s/]\n"
"\t%-20s: patten used by strftime to create the log filename [%s]\n"
"\t%-20s: maximum connection backlog [%d]\n"
"\t%-20s: be more verbose in syslog [off]\n"
"\t%-20s: deamonize me\n",
argv[0],
"-p port", DEFAULTPORT,
"-l logPath", DEFAULTPATH,
"-n logNamePattern", LOGNAMEPATTERN,
"-b backlog", MAXPENDING,
"-v",
"-D");
exit(EXIT_FAILURE);
}
}
return 0;
}

27
src/include/appConfig.h
View File

@ -0,0 +1,27 @@
#ifndef __APP_CONFIG_H__
#define __APP_CONFIG_H__
#define MAXPENDING 10 /* Maximum outstanding connection requests */
#define MAXCLIENTS 1000 /* Maximum connection handled in paralell */
#define READBUFSIZE 2048 /* Size of receive buffer */
#define DEFAULTPORT 8801 /* default port for service */
#define DEFAULTPATH "logfiles"
#define LOGNAMEPATTERN "log-%Y-%m-%d_%Hh"
typedef struct {
unsigned char verbose;
unsigned char doDaemon;
unsigned char doGzip;
unsigned int maxPending;
unsigned int port;
char logPath[513];
char namePat[513];
} tAppConfig;
extern unsigned char verbose;
extern unsigned char doGzip;
int
handleCmdLine(tAppConfig * config, int argc, char *argv[]);
#endif // __APP_CONFIG_H__

28
src/include/client.h
View File

@ -0,0 +1,28 @@
#ifndef __CLIENT_H__
#define __CLIENT_H__
#include <stdio.h> /* for FILE */
#define READBUFSIZE 2048 /* Size of receive buffer */
#define CLIENTMULTMAX 512U /* 1MB maximum size the readbuffer may grow */
#define WRITE_ERR_IO -1
#define WRITE_ERR_NOPRINT -2
#define READ_ERR_LONGLINE -2
typedef struct {
int socket;
char * buffer;
unsigned int readPos;
unsigned int bufMult;
char remoteAddr[16];
} tClient;
void clientClose(tClient *);
int clientRead(tClient *);
int writeRemaining(tClient *, FILE *);
int writeBuffer(tClient *, FILE *);
#endif // __CLIENT_H__

6
src/include/daemonize.h
View File

@ -0,0 +1,6 @@
#ifndef __DAEMONIZE_H__
#define __DAEMONIZE_H__
void daemonize(void);
#endif // __DAEMONIZE_H__

14
src/include/monitor.h
View File

@ -0,0 +1,14 @@
#ifndef __MONITOR_H__
#define __MONITOR_H__
#include <syslog.h> /* for logging */
#define MON_INFO 0
#define MON_WARNING 1
#define MON_CRITICAL 2
#define MON_FAILURE 3
int monitor(unsigned int sev, const char * pattern, const char * message);
int syslogMonitor (unsigned int logLvl, unsigned int sev, const char *pattern, const char * message, ...) __attribute__ ((format (printf, 4, 5)));
#endif /* __MONITOR_H__ */

31
src/include/server.h
View File

@ -0,0 +1,31 @@
#ifndef __SERVER_H__
#define __SERVER_H__
#include <stdio.h> /* for printf() and fprintf() */
#include <sys/select.h> /* for select system call and related */
#include "client.h"
typedef struct {
int servSock;
tClient clients[FD_SETSIZE];
unsigned int maxFd;
fd_set socks;
char logPath[512];
char namePat[512];
FILE * wHandle;
} tVirtualItemServer;
void serverClose(tVirtualItemServer *);
void serverShutdown(tVirtualItemServer *);
void serverInit(
tVirtualItemServer *,
unsigned int,
unsigned int,
const char *,
const char *);
void serverRun(tVirtualItemServer *);
void logRotate(tVirtualItemServer *);
#endif // __SERVER_H__

10
src/include/signalHandling.h
View File

@ -0,0 +1,10 @@
#ifndef __SIGNAL_HANDLING_H__
#define __SIGNAL_HANDLING_H__
extern volatile int doShutdown;
void terminate(int signum);
void init_signals(void);
#endif // __SIGNAL_HANDLING_H__

9
src/include/socket.h
View File

@ -0,0 +1,9 @@
#ifndef __SOCKET_H__
#define __SOCKET_H__
#include <arpa/inet.h> /* for in_port_t */
int initServerSocket(in_port_t port, int backlog);
int acceptConnection(int servSock, char remoteAddr[16]);
#endif /* __SOCKET_H__ */

109
src/logRotate.c
View File

@ -0,0 +1,109 @@
#include <sys/select.h> /* for select system call and related */
#include <time.h>
#include <unistd.h> /* for fork and exec */
#include <sys/types.h>
#include <sys/wait.h> /* for wait */
#include <stdio.h> /* fopen and stuff */
#include <stdlib.h> /* exit */
#include <string.h> /* strncpy, memcpy, etc. */
#include <syslog.h>
#include <errno.h>
#include "include/appConfig.h"
#include "include/monitor.h"
#include "include/server.h"
void
_gzip(tVirtualItemServer * server, const char * logName)
{
pid_t gzipPid = fork();
switch(gzipPid) {
pid_t tmpPid;
case 0:
/* first close everything in child */
serverClose(server);
// We don't care about finishing of child, so decouple it
// by using a second child that stop immediatly
tmpPid = fork();
if (0 == tmpPid) {
syslog(LOG_INFO, "gzip: %s", logName);
// if (-1 == execl("/bin/gzip", "/bin/gzip", "-9", logName, (char *) 0)) {
if (-1 == execl("/bin/gzip", "/bin/gzip", logName, (char *) 0)) {
syslogMonitor(LOG_ERR, MON_WARNING, "logrotate.gzip",
"execl failed for gzip %s: %s", logName, strerror(errno));
}
}
exit(EXIT_SUCCESS);
case -1:
syslogMonitor(LOG_ERR, MON_WARNING, "logrotate.fork",
"fork failed for gzip %s: %s", logName, strerror(errno));
break;
default:
wait(NULL);
break;
}
}
void
logRotate(tVirtualItemServer * server)
{
static char logName[1024] = "";
char strftimeName[128] = "";
char newLogName[1024] = "";
time_t t;
struct tm *tmp;
t = time(NULL);
tmp = localtime(&t);
if (tmp == NULL) {
syslogMonitor(LOG_ERR, MON_WARNING, "logrotate.localtime",
"can't get localtime for new logname. continue with old one");
return;
}
if (strftime(
strftimeName,
sizeof(strftimeName)-1,
server->namePat,
tmp) == 0)
{
syslogMonitor(LOG_ERR, MON_WARNING, "logrotate.strftime",
"strftime returned 0 for new logname. continue with old one");
return;
}
snprintf(
newLogName,
sizeof(newLogName)-1,
"%s/%s",
server->logPath,
strftimeName);
if (0 != strncmp(logName, newLogName, sizeof(logName)-1)) {
if (0 != verbose) {
syslog(LOG_INFO, "actual logfile name: %s", logName);
syslog(LOG_INFO, "new logfile name: %s", newLogName);
}
if (NULL != server->wHandle) {
fclose(server->wHandle);
server->wHandle = NULL;
if (doGzip) {
_gzip(server, logName);
}
}
strncpy(logName, newLogName, sizeof(logName)-1);
server->wHandle = fopen(logName, "w");
}
}

87
src/monitor.c
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@ -0,0 +1,87 @@
#include <stdlib.h> /* for system() */
#include <sys/wait.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
#include <stdarg.h> /* for ellipse handling */
#include "include/signalHandling.h"
#include "include/monitor.h"
#define MONITORCMD "/usr/bin/monitor"
#define MONITORTYPE "app"
#define MONITORNAME "virtualitem.logreceiver"
const char severity[][10] = {
"info",
"warning",
"critical",
"failure"
};
int
monitor(
unsigned int sev,
const char * pattern,
const char * message
) {
char monCall[1024];
int ret;
snprintf(monCall, 1023,
"%s %s %s.%s.%s \"%s\"",
MONITORCMD,
severity[sev],
MONITORTYPE,
MONITORNAME,
pattern,
message);
ret = system(monCall);
if (WIFSIGNALED(ret)) {
switch (WTERMSIG(ret)) {
case SIGINT:
case SIGQUIT:
syslog(LOG_INFO, "interrupted in monitor call");
doShutdown=1;
}
}
if (-1 == ret || 0 != WEXITSTATUS(ret)) {
syslog(LOG_ERR, "call monitoring failed: %s", strerror(errno));
}
return ret;
}
/* this handles simple %d and %s replacements,
* complexer stuff must be prepared via snprintf
* the complete message should not extend 1024
* Bytes, else it will be truncated silently */
int
syslogMonitor(
unsigned int logLvl,
unsigned int sev,
const char * pattern,
const char * message,
...
) {
va_list args;
char buffer[1025];
int maxBuf = sizeof(buffer)/sizeof(buffer[0]);
memset(buffer, 0, maxBuf);
va_start(args, message);
vsnprintf(buffer, 1024, message, args);
va_end(args);
syslog(logLvl, "%s", buffer);
monitor(sev, pattern, buffer);
return 0;
}

19
src/po
View File

@ -0,0 +1,19 @@
# Sed script that remove the POT-Creation-Date line in the header entry
# from a POT file.
#
# The distinction between the first and the following occurrences of the
# pattern is achieved by looking at the hold space.
/^"POT-Creation-Date: .*"$/{
x
# Test if the hold space is empty.
s/P/P/
ta
# Yes it was empty. First occurrence. Remove the line.
g
d
bb
:a
# The hold space was nonempty. Following occurrences. Do nothing.
x
:b
}

43
src/serverInit.c
View File

@ -0,0 +1,43 @@
#include <sys/select.h> /* for select system call and related */
#include <string.h> /* for memset and stuff */
#include <stdlib.h> /* for getopt */
#include "include/server.h"
#include "include/socket.h"
#include "include/monitor.h"
void
serverInit(
tVirtualItemServer * server,
unsigned int port,
unsigned int pending,
const char * logPath,
const char * namePat)
{
FD_ZERO(&(server->socks));
server->servSock = initServerSocket(port, pending);
server->maxFd = server->servSock;
FD_SET(server->servSock, &(server->socks));
strncpy(server->logPath, logPath, sizeof(server->logPath)-1);
strncpy(server->namePat, namePat, sizeof(server->namePat)-1);
memset(server->clients, 0, sizeof(server->clients));
/*
* try to open file (firstrun)
*/
if (NULL == server->wHandle) {
logRotate(server);
if (NULL == server->wHandle) {
syslogMonitor(LOG_ERR, MON_CRITICAL, "logfile.rotate",
"no valid handle for logfile");
syslogMonitor(LOG_ERR, MON_FAILURE, "logfile.rotate",
"no valid handle for logfile - service terminated");
exit(EXIT_FAILURE);
}
}
}

128
src/serverRun.c
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@ -0,0 +1,128 @@
#include <sys/select.h> /* for select system call and related */
#include <string.h> /* for memset and stuff */
#include <stdlib.h> /* for exit */
#include <errno.h> /* for errno */
#include "include/server.h"
#include "include/socket.h"
#include "include/monitor.h"
#include "include/signalHandling.h"
#undef MAX
#define MAX(x,y) ((x) > (y) ? (x) : (y))
void
serverRun(tVirtualItemServer * server)
{
syslogMonitor(LOG_INFO, MON_INFO, "startup", "service started");
while (!doShutdown) /* until error or signal */
{
fd_set rfds;
int i;
memcpy(&rfds, &(server->socks), sizeof(fd_set));
/*
* wait for handles to become ready
*/
if (-1 == select((server->maxFd)+1, &rfds, NULL, NULL, NULL))
{
switch (errno) {
default:
case EBADF:
case EINVAL:
case ENOMEM:
doShutdown = 1;
/* Fallthrough */
case EINTR:
syslogMonitor(LOG_ERR, MON_CRITICAL, "select",
"select systemcall failed: [%s]",
strerror(errno));
syslogMonitor(LOG_ERR, MON_FAILURE, "select",
"select systemcall failed: [%s] - service terminated",
strerror(errno));
continue; /* in while loop above */
}
}
/*
* update file to actual time
*/
logRotate(server);
if (NULL == server->wHandle) {
syslogMonitor(LOG_ERR, MON_CRITICAL, "logfile.rotate",
"no valid handle for logfile - service terminated");
exit(EXIT_FAILURE);
}
/*
* handle accept
*/
if (FD_ISSET(server->servSock, &rfds)) {
int fd;
char remoteAddr[16] = "";
if (-1 != (fd = acceptConnection(server->servSock, remoteAddr))) {
(server->clients)[fd].socket = fd; // save the socket handle
// within the client struct
//
strncpy(
(server->clients)[fd].remoteAddr,
remoteAddr,
sizeof((server->clients)[fd].remoteAddr)-1);
FD_SET(fd, &(server->socks));
server->maxFd = MAX(fd, server->maxFd);
}
FD_CLR(server->servSock, &rfds);
}
/* handle reads */
for (i=3; i<=server->maxFd; i++) {
if (FD_ISSET(i, &rfds)) {
switch (clientRead(&((server->clients)[i]))) {
case 0:
/*
* normal close: write remaining data
*/
writeRemaining(
&((server->clients)[i]),
server->wHandle);
/* FALLTHROUGH */
case -1:
/*
* read failure / close connection
* FALLTHROUGH
*/
case READ_ERR_LONGLINE:
/*
* detected very long line read from client
* message is already given now terminate connection
* FALLTHROUG
*/
clientClose(&((server->clients)[i]));
FD_CLR(i, &(server->socks));
break;
default:
if (0 > writeBuffer(
&((server->clients)[i]),
server->wHandle))
{
/*
* got IO Error or binary data
* the message is already monitored in client code
*/
clientClose(&((server->clients)[i]));
FD_CLR(i, &(server->socks));
}
break;
}
}
}
}
}

57
src/serverShutdown.c
View File

@ -0,0 +1,57 @@
#include <stdio.h> /* for printf() and fprintf() */
#include <sys/select.h> /* for select system call and related */
#include <sys/socket.h> /* for select system call and related */
#include <stdlib.h> /* for exit */
#include <string.h> /* for memset and stuff */
#include <unistd.h> /* for getopt */
#include <errno.h> /* for errno */
#include "include/appConfig.h"
#include "include/server.h"
#include "include/monitor.h"
void
serverClose(tVirtualItemServer * server)
{
int i;
for (i=3; i<=server->maxFd; i++) {
if (FD_ISSET(i, &(server->socks))) {
if (i == server->servSock) {
close(server->servSock);
} else {
close(((server->clients)[i]).socket);
free(((server->clients)[i]).buffer);
FD_CLR(i, &(server->socks));
}
}
}
if (NULL != server->wHandle) {
fclose(server->wHandle);
}
}
void
serverShutdown(tVirtualItemServer * server)
{
int i;
for (i=3; i<=server->maxFd; i++) {
if (FD_ISSET(i, &(server->socks))) {
if (i == server->servSock) {
shutdown(server->servSock, SHUT_RDWR);
close(server->servSock);
} else {
writeBuffer(&(server->clients[i]), server->wHandle);
clientClose(&((server->clients)[i]));
FD_CLR(i, &(server->socks));
}
}
}
if (NULL != server->wHandle) {
fclose(server->wHandle);
}
}

28
src/signalHandling.c
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@ -0,0 +1,28 @@
#include <signal.h> /* for signal() and signal names */
#include "include/monitor.h"
volatile int doShutdown;
void terminate(int signum)
{
signal(signum, SIG_IGN);
syslogMonitor(LOG_INFO, MON_CRITICAL, "signals",
"caugth deadly signal %d", signum);
syslogMonitor(LOG_INFO, MON_FAILURE, "signals",
"caugth deadly signal %d - service terminated", signum);
doShutdown = 1;
}
void init_signals(void)
{
signal(SIGTERM, terminate);
signal(SIGHUP, SIG_IGN);
signal(SIGINT, terminate);
signal(SIGQUIT, terminate);
signal(SIGABRT, terminate);
signal(SIGALRM, SIG_IGN);
signal(SIGURG, SIG_IGN);
signal(SIGPIPE, SIG_IGN);
}

93
src/socket.c
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#include <stdio.h> /* for printf() and fprintf() */
#include <sys/types.h> /* SO_REUSEADDR */
#include <sys/socket.h> /* for socket(), bind(), and connect() */
#include <arpa/inet.h> /* for sockaddr_in and inet_ntoa() */
#include <stdlib.h> /* for atoi() and exit() */
#include <string.h> /* for memset() */
#include <unistd.h> /* for close() */
#include <errno.h> /* for errno */
#include <syslog.h>
#include "include/appConfig.h"
#include "include/monitor.h"
int
initServerSocket(in_port_t port, int backlog)
{
int sock; /* socket descriptor for server */
struct sockaddr_in addr; /* Local address */
int reUse = 1; /* TODO: make this configurable */
/* Create socket for incoming connections */
if (-1 == (sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP))) {
syslogMonitor(LOG_ERR, MON_CRITICAL, "server.socket",
"error opening socket: %s",
strerror(errno));
syslogMonitor(LOG_ERR, MON_FAILURE, "server.socket",
"error opening socket: %s - service terminated",
strerror(errno));
exit(EXIT_FAILURE);
}
/* Make the socket REUSE a TIME_WAT socket */
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reUse, sizeof (reUse));
/* Construct local address structure */
memset(&addr, 0, sizeof(addr)); /* Zero out structure */
addr.sin_family = AF_INET; /* Internet address family */
addr.sin_addr.s_addr = htonl(INADDR_ANY); /* Any incoming interface */
addr.sin_port = htons(port); /* Local port */
/* Bind to the local address */
if (-1 == bind(sock, (struct sockaddr *) &addr, sizeof(addr))) {
syslogMonitor(LOG_ERR, MON_CRITICAL, "server.bind",
"error binding socket: %s",
strerror(errno));
syslogMonitor(LOG_ERR, MON_FAILURE, "server.bind",
"error binding socket: %s - service terminated",
strerror(errno));
exit(EXIT_FAILURE);
}
/* Mark the socket so it will listen for incoming connections */
if (-1 == listen(sock, backlog)) {
syslogMonitor(LOG_ERR, MON_CRITICAL, "server.listen",
"error binding socket: %s - service terminated",
strerror(errno));
syslogMonitor(LOG_ERR, MON_FAILURE, "server.listen",
"error binding socket: %s - service terminated",
strerror(errno));
exit(EXIT_FAILURE);
}
return sock;
}
int
acceptConnection(int servSock, char remoteAddr[16])
{
int sock; /* Socket descriptor for client */
struct sockaddr_in addr; /* Client address */
unsigned int len; /* Length of client address data structure */
/* Set the size of the in-out parameter */
len = sizeof(addr);
/* Wait for a client to connect */
if (-1 == (sock = accept(servSock, (struct sockaddr *) &addr, &len))) {
syslogMonitor(LOG_ERR, MON_WARNING, "server.accept",
"error acception connection: %s", strerror(errno));
} else {
strncpy (remoteAddr, inet_ntoa(addr.sin_addr), sizeof(remoteAddr)-1);
}
/* clntSock is connected to a client! */
if (0 != verbose) {
syslog(LOG_INFO, "handling client %s\n", inet_ntoa(addr.sin_addr));
}
return sock;
}

153
src/writeBuffer.c
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#include <stdio.h> /* for ferror() */
#include <string.h> /* for memset and stuff */
#include <errno.h> /* for errno */
#include <ctype.h> /* for isprint */
#include "include/client.h"
#include "include/monitor.h"
int
_handleIoError(FILE * wHandle)
{
if (ferror(wHandle)) {
switch (errno) {
case EIO:
/* FALLTHROUGHT */
case ENOSPC:
syslogMonitor(LOG_ERR, MON_CRITICAL, "io.fatal",
"fatal IO error [%s]",
strerror(errno));
syslogMonitor(LOG_ERR, MON_FAILURE, "io.fatal",
"fatal IO error [%s] - service terminated",
strerror(errno));
break;
}
return 1;
}
return 0;
}
int
_isPrintableBuffer(const char * buffer, size_t size, char * found)
{
while (isprint(*(buffer++)) && 1 < size--);
if (0 == size) {
return 1;
} else {
*found = *(buffer-1);
return 0;
}
}
int
_doWrite(tClient * client, size_t size, FILE * wHandle)
{
char found = '\0';
if (NULL != client->buffer) {
if (!_isPrintableBuffer(client->buffer, size, &found)) {
syslogMonitor(LOG_ERR, MON_WARNING, "data.binary",
"got non printable character[0x%02x] from client[%s] - connection closed",
found,
client->remoteAddr);
return WRITE_ERR_NOPRINT;
}
/* write remaining stuff to file */
fwrite(client->buffer, size, 1, wHandle);
if (_handleIoError(wHandle)) {
return WRITE_ERR_IO;
}
fputc('\n', wHandle);
if (_handleIoError(wHandle)) {
return WRITE_ERR_IO;
}
fflush(wHandle);
if (_handleIoError(wHandle)) {
return WRITE_ERR_IO;
}
return size + 1;
} else {
return 0;
}
}
/*
* write all data that remains in buffer, even if its not terminated by
* a newline. Anyway ignore trailing newlines.
*/
int
writeRemaining(tClient * client, FILE * wHandle)
{
int written = writeBuffer(client, wHandle);
if (0 < client->readPos) {
unsigned int wLen = client->readPos;
/* ignore trailing newlines */
while (0 < client->readPos && '\n' == client->buffer[wLen]) {
wLen--;
}
written += _doWrite(client, wLen, wHandle);
}
memset(client->buffer, 0, client->readPos);
client->readPos = 0;
return written;
}
/*
* write buffer till last newline is reached.
* If no newline is in buffer, nothing is written.
*/
int
writeBuffer(tClient * client, FILE * wHandle)
{
char * nlpos = memchr(client->buffer, '\n', client->readPos);
int written = 0;
while (NULL != nlpos) {
unsigned int moveSize, clearSize;
char * actAddr;
if (nlpos > client->buffer) {
unsigned int wLen = nlpos - client->buffer;
int wTemp = _doWrite(client, wLen, wHandle);
if (0 > wTemp) {
return wTemp;
}
written += wTemp;
}
actAddr = client->buffer + client->readPos;
moveSize = actAddr - nlpos - 1;
clearSize = actAddr - client->buffer - moveSize;
memmove(client->buffer, nlpos+1, moveSize);
memset(client->buffer + moveSize, 0, clearSize);
client->readPos = moveSize;
nlpos = memchr(client->buffer, '\n', client->readPos);
}
return written;
}
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