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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nspr.h"
#include "plgetopt.h"
#include <stdlib.h>
#include <string.h>
#ifndef IOV_MAX
#define IOV_MAX 16
#endif
#define BASE_PORT 9867
int PR_CALLBACK Writev(int argc, char **argv)
{
PRStatus rv;
PRNetAddr serverAddr;
PRFileDesc *clientSock, *debug = NULL;
char *buffer = NULL;
PRIOVec *iov = NULL;
PRBool passed = PR_TRUE;
PRIntervalTime timein, elapsed, timeout;
PRIntervalTime tmo_min = 0x7fffffff, tmo_max = 0, tmo_elapsed = 0;
PRInt32 tmo_counted = 0, iov_index, loop, bytes, number_fragments;
PRInt32 message_length = 100, fragment_length = 100, messages = 100;
struct Descriptor { PRInt32 length; PRUint32 checksum; } descriptor;
/*
* USAGE
* -h dns name of host serving the connection (default = self)
* -m number of messages to send (default = 100)
* -s size of each message (default = 100)
* -f size of each message fragment (default = 100)
*/
PLOptStatus os;
PLOptState *opt = PL_CreateOptState(argc, argv, "dh:m:s:f:");
PR_STDIO_INIT();
rv = PR_InitializeNetAddr(PR_IpAddrLoopback, BASE_PORT, &serverAddr);
PR_ASSERT(PR_SUCCESS == rv);
while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
{
if (PL_OPT_BAD == os) continue;
switch (opt->option)
{
case 'h': /* the remote host */
{
PRIntn es = 0;
PRHostEnt host;
char buffer[1024];
(void)PR_GetHostByName(opt->value, buffer, sizeof(buffer), &host);
es = PR_EnumerateHostEnt(es, &host, BASE_PORT, &serverAddr);
PR_ASSERT(es > 0);
}
break;
case 'd': /* debug mode */
debug = PR_GetSpecialFD(PR_StandardError);
break;
case 'm': /* number of messages to send */
messages = atoi(opt->value);
break;
case 's': /* total size of each message */
message_length = atoi(opt->value);
break;
case 'f': /* size of each message fragment */
fragment_length = atoi(opt->value);
break;
default:
break;
}
}
PL_DestroyOptState(opt);
buffer = (char*)malloc(message_length);
number_fragments = (message_length + fragment_length - 1) / fragment_length + 1;
while (IOV_MAX < number_fragments)
{
fragment_length = message_length / (IOV_MAX - 2);
number_fragments = (message_length + fragment_length - 1) /
fragment_length + 1;
if (NULL != debug) PR_fprintf(debug,
"Too many fragments - reset fragment length to %ld\n", fragment_length);
}
iov = (PRIOVec*)malloc(number_fragments * sizeof(PRIOVec));
iov[0].iov_base = (char*)&descriptor;
iov[0].iov_len = sizeof(descriptor);
for (iov_index = 1; iov_index < number_fragments; ++iov_index)
{
iov[iov_index].iov_base = buffer + (iov_index - 1) * fragment_length;
iov[iov_index].iov_len = fragment_length;
}
for (bytes = 0; bytes < message_length; ++bytes)
buffer[bytes] = (char)bytes;
timeout = PR_SecondsToInterval(1);
for (loop = 0; loop < messages; ++loop)
{
if (NULL != debug)
PR_fprintf(debug, "[%d]socket ... ", loop);
clientSock = PR_NewTCPSocket();
if (clientSock)
{
timein = PR_IntervalNow();
if (NULL != debug)
PR_fprintf(debug, "connecting ... ");
rv = PR_Connect(clientSock, &serverAddr, timeout);
if (PR_SUCCESS == rv)
{
descriptor.checksum = 0;
descriptor.length = (loop < (messages - 1)) ? message_length : 0;
if (0 == descriptor.length) number_fragments = 1;
else
for (iov_index = 0; iov_index < descriptor.length; ++iov_index)
{
PRUint32 overflow = descriptor.checksum & 0x80000000;
descriptor.checksum = (descriptor.checksum << 1);
if (0x00000000 != overflow) descriptor.checksum += 1;
descriptor.checksum += buffer[iov_index];
}
if (NULL != debug) PR_fprintf(
debug, "sending %d bytes ... ", descriptor.length);
/* then, at the last moment ... */
descriptor.length = PR_ntohl(descriptor.length);
descriptor.checksum = PR_ntohl(descriptor.checksum);
bytes = PR_Writev(clientSock, iov, number_fragments, timeout);
if (NULL != debug)
PR_fprintf(debug, "closing ... ");
rv = PR_Shutdown(clientSock, PR_SHUTDOWN_BOTH);
rv = PR_Close(clientSock);
if (NULL != debug) PR_fprintf(
debug, "%s\n", ((PR_SUCCESS == rv) ? "good" : "bad"));
elapsed = PR_IntervalNow() - timein;
if (elapsed < tmo_min) tmo_min = elapsed;
else if (elapsed > tmo_max) tmo_max = elapsed;
tmo_elapsed += elapsed;
tmo_counted += 1;
}
else
{
if (NULL != debug) PR_fprintf(
debug, "failed - retrying (%d, %d)\n",
PR_GetError(), PR_GetOSError());
PR_Close(clientSock);
}
}
else if (NULL != debug)
{
PR_fprintf(debug, "unable to create client socket\n");
passed = PR_FALSE;
}
}
if (NULL != debug) {
if (0 == tmo_counted) {
PR_fprintf(debug, "No connection made\n");
} else {
PR_fprintf(
debug, "\nTimings: %d [%d] %d (microseconds)\n",
PR_IntervalToMicroseconds(tmo_min),
PR_IntervalToMicroseconds(tmo_elapsed / tmo_counted),
PR_IntervalToMicroseconds(tmo_max));
}
}
PR_DELETE(buffer);
PR_DELETE(iov);
PR_fprintf(
PR_GetSpecialFD(PR_StandardError),
"%s\n", (passed) ? "PASSED" : "FAILED");
return (passed) ? 0 : 1;
}
int main(int argc, char **argv)
{
return (PR_VersionCheck(PR_VERSION)) ?
PR_Initialize(Writev, argc, argv, 4) : -1;
} /* main */
/* writev.c */
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