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/* $Id: socket_io_bouncer.c,v 6.19 2012/04/25 15:00:27 kazimird Exp $
* ===========================================================================
*
* PUBLIC DOMAIN NOTICE
* National Center for Biotechnology Information
*
* This software/database is a "United States Government Work" under the
* terms of the United States Copyright Act. It was written as part of
* the author's official duties as a United States Government employee and
* thus cannot be copyrighted. This software/database is freely available
* to the public for use. The National Library of Medicine and the U.S.
* Government have not placed any restriction on its use or reproduction.
*
* Although all reasonable efforts have been taken to ensure the accuracy
* and reliability of the software and data, the NLM and the U.S.
* Government do not and cannot warrant the performance or results that
* may be obtained by using this software or data. The NLM and the U.S.
* Government disclaim all warranties, express or implied, including
* warranties of performance, merchantability or fitness for any particular
* purpose.
*
* Please cite the author in any work or product based on this material.
*
* ===========================================================================
*
* Author: Denis Vakatov
*
* File Description:
* A simple test program to listen on a socket and just bounce all
* incoming data (e.g., can be used to test "ncbi_socket_connector.[ch]")
*
*/
#include <connect/ncbi_connutil.h>
#include <connect/ncbi_util.h>
#include "../ncbi_assert.h"
/* This header must go last */
#include "test_assert.h"
static FILE* s_LogFile;
/* Accept connections and bounce the incoming data back to the client
* (only one client at a time). Perform up to "n_cycle" sessions, then exit.
*/
static void s_DoServer(const char* sport, int n_cycle)
{
int i;
unsigned short nport;
LSOCK lsock;
EIO_Status status;
/* Create listening socket */
if (sscanf(sport, "%hu%n", &nport, &i) < 1 || sport[i]) {
nport = 0;
i = 0;
}
status = LSOCK_Create(nport, 1, &lsock);
if (status == eIO_Success && !nport && sport[i]) {
FILE* fp;
nport = LSOCK_GetPort(lsock, eNH_HostByteOrder);
if (nport && (fp = fopen(sport, "w")) != 0) {
if (fprintf(fp, "%hu", nport) < 1 || fflush(fp) != 0)
status = eIO_Unknown;
fclose(fp);
} else
status = eIO_Unknown;
}
fprintf(s_LogFile, "DoServer(port = %hu, n_cycle = %u)\n", nport, n_cycle);
fflush(s_LogFile);
assert(status == eIO_Success);
/* Accept connections from clients and run test sessions */
while ( n_cycle-- ) {
SOCK sock;
size_t n_io, n_io_done;
char buf[1024];
STimeout timeout;
/* Accept connection */
status = LSOCK_Accept(lsock, 0, &sock);
assert(status == eIO_Success);
/* Set some weird I/O timeouts for the accepted connection */
timeout.sec = 100;
timeout.usec = 888;
status = SOCK_SetTimeout(sock, eIO_Read, &timeout);
assert(status == eIO_Success);
status = SOCK_SetTimeout(sock, eIO_Write, &timeout);
assert(status == eIO_Success);
/* Bounce all incoming data back to the client */
while ((status = SOCK_Read(sock,buf,sizeof(buf),&n_io,eIO_ReadPlain))
== eIO_Success) {
status = SOCK_Write(sock, buf, n_io, &n_io_done, eIO_WritePersist);
if (status != eIO_Success) {
fprintf(s_LogFile,
"Failed to write -- DoServer(n_cycle = %d): %s\n",
n_cycle, IO_StatusStr(status));
fflush(s_LogFile);
break;
}
}
assert(status == eIO_Closed);
/* Close connection */
status = SOCK_Close(sock);
assert(status == eIO_Success || status == eIO_Closed);
}
/* Close listening socket */
status = LSOCK_Close(lsock);
assert(status == eIO_Success);
}
int main(int argc, const char* argv[])
{
SConnNetInfo* net_info;
int n_cycle = 100;
/* logging */
s_LogFile = fopen("socket_io_bouncer.log", "ab");
assert(s_LogFile);
CORE_SetLOGFormatFlags(fLOG_None | fLOG_Level |
fLOG_OmitNoteLevel | fLOG_DateTime);
CORE_SetLOGFILE(s_LogFile, 1/*auto-close*/);
assert((net_info = ConnNetInfo_Create(0)) != 0);
/* cmd.-line args */
if (argc > 3 || !argv[1] || !*argv[1])
n_cycle = -1;
else if (argc == 3 && sscanf(argv[2], "%d", &n_cycle) != 1)
n_cycle = -1;
if (n_cycle <= 0) {
fprintf(stderr, "Usage: %s <port> [n_cycle]\n\n", argv[0]);
fprintf(s_LogFile, "Usage: %s <port> [n_cycle]\n\n", argv[0]);
return 1/*error*/;
}
if (net_info->debug_printout != eDebugPrintout_None)
SOCK_SetDataLoggingAPI(eOn);
/* run */
s_DoServer(argv[1], n_cycle);
/* cleanup */
verify(SOCK_ShutdownAPI() == eIO_Success);
ConnNetInfo_Destroy(net_info);
CORE_SetLOG(0);
return 0;
}
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