tor-browser

nonblock.c (6074B)

---

/* -*- 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 "prio.h"
#include "prerror.h"
#include "prlog.h"
#include "prprf.h"
#include "prnetdb.h"
#include "plerror.h"
#include "obsolete/probslet.h"

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#define NUMBER_ROUNDS 5

#define UNIT_TIME 100 /* unit time in milliseconds */
#define CHUNK_SIZE 10
#undef USE_PR_SELECT /* If defined, we use PR_Select. \
                     * If not defined, use PR_Poll instead. */

#if defined(USE_PR_SELECT)
#  include "pprio.h"
#endif

static void PR_CALLBACK clientThreadFunc(void* arg) {
 PRUintn port = (PRUintn)arg;
 PRFileDesc* sock;
 PRNetAddr addr;
 char buf[CHUNK_SIZE];
 int i;
 PRIntervalTime unitTime = PR_MillisecondsToInterval(UNIT_TIME);
 PRSocketOptionData optval;
 PRStatus retVal;
 PRInt32 nBytes;

 /* Initialize the buffer so that Purify won't complain */
 memset(buf, 0, sizeof(buf));

 addr.inet.family = PR_AF_INET;
 addr.inet.port = PR_htons((PRUint16)port);
 addr.inet.ip = PR_htonl(PR_INADDR_LOOPBACK);
 PR_snprintf(buf, sizeof(buf), "%hu", addr.inet.ip);

 /* time 1 */
 PR_Sleep(unitTime);
 sock = PR_NewTCPSocket();
 optval.option = PR_SockOpt_Nonblocking;
 optval.value.non_blocking = PR_TRUE;
 PR_SetSocketOption(sock, &optval);
 retVal = PR_Connect(sock, &addr, PR_INTERVAL_NO_TIMEOUT);
 if (retVal == PR_FAILURE && PR_GetError() == PR_IN_PROGRESS_ERROR) {
#if !defined(USE_PR_SELECT)
   PRPollDesc pd;
   PRInt32 n;
   fprintf(stderr, "connect: EWOULDBLOCK, good\n");
   pd.fd = sock;
   pd.in_flags = PR_POLL_WRITE;
   n = PR_Poll(&pd, 1, PR_INTERVAL_NO_TIMEOUT);
   PR_ASSERT(n == 1);
   PR_ASSERT(pd.out_flags == PR_POLL_WRITE);
#else
   PR_fd_set writeSet;
   PRInt32 n;
   fprintf(stderr, "connect: EWOULDBLOCK, good\n");
   PR_FD_ZERO(&writeSet);
   PR_FD_SET(sock, &writeSet);
   n = PR_Select(0, NULL, &writeSet, NULL, PR_INTERVAL_NO_TIMEOUT);
   PR_ASSERT(n == 1);
   PR_ASSERT(PR_FD_ISSET(sock, &writeSet));
#endif
 }
 printf("client connected\n");
 fflush(stdout);

 /* time 4, 7, 11, etc. */
 for (i = 0; i < NUMBER_ROUNDS; i++) {
   PR_Sleep(3 * unitTime);
   nBytes = PR_Write(sock, buf, sizeof(buf));
   if (nBytes == -1) {
     if (PR_GetError() == PR_WOULD_BLOCK_ERROR) {
       fprintf(stderr, "write: EWOULDBLOCK\n");
       exit(1);
     } else {
       fprintf(stderr, "write: failed\n");
     }
   }
   printf("client sent %d bytes\n", nBytes);
   fflush(stdout);
 }

 PR_Close(sock);
}

static PRIntn PR_CALLBACK RealMain(PRIntn argc, char** argv) {
 PRFileDesc *listenSock, *sock;
 PRUint16 listenPort;
 PRNetAddr addr;
 char buf[CHUNK_SIZE];
 PRThread* clientThread;
 PRInt32 retVal;
 PRSocketOptionData optval;
 PRIntn i;
 PRIntervalTime unitTime = PR_MillisecondsToInterval(UNIT_TIME);

 /* Create a listening socket */
 if ((listenSock = PR_NewTCPSocket()) == NULL) {
   fprintf(stderr, "Can't create a new TCP socket\n");
   exit(1);
 }
 addr.inet.family = PR_AF_INET;
 addr.inet.ip = PR_htonl(PR_INADDR_ANY);
 addr.inet.port = PR_htons(0);
 if (PR_Bind(listenSock, &addr) == PR_FAILURE) {
   fprintf(stderr, "Can't bind socket\n");
   exit(1);
 }
 if (PR_GetSockName(listenSock, &addr) == PR_FAILURE) {
   fprintf(stderr, "PR_GetSockName failed\n");
   exit(1);
 }
 listenPort = PR_ntohs(addr.inet.port);
 if (PR_Listen(listenSock, 5) == PR_FAILURE) {
   fprintf(stderr, "Can't listen on a socket\n");
   exit(1);
 }

 PR_snprintf(buf, sizeof(buf),
             "The server thread is listening on port %hu\n\n", listenPort);
 printf("%s", buf);

 clientThread = PR_CreateThread(PR_USER_THREAD, clientThreadFunc,
                                (void*)listenPort, PR_PRIORITY_NORMAL,
                                PR_LOCAL_THREAD, PR_UNJOINABLE_THREAD, 0);
 if (clientThread == NULL) {
   fprintf(stderr, "can't create thread\n");
   exit(1);
 }

 printf("client thread created.\n");

 optval.option = PR_SockOpt_Nonblocking;
 optval.value.non_blocking = PR_TRUE;
 PR_SetSocketOption(listenSock, &optval);
 /* time 0 */
 sock = PR_Accept(listenSock, NULL, PR_INTERVAL_NO_TIMEOUT);
 if (sock != NULL || PR_GetError() != PR_WOULD_BLOCK_ERROR) {
   PL_PrintError("First Accept\n");
   fprintf(stderr, "First PR_Accept() xxx\n");
   exit(1);
 }
 printf("accept: EWOULDBLOCK, good\n");
 fflush(stdout);
 /* time 2 */
 PR_Sleep(2 * unitTime);
 sock = PR_Accept(listenSock, NULL, PR_INTERVAL_NO_TIMEOUT);
 if (sock == NULL) {
   PL_PrintError("Second Accept\n");
   fprintf(stderr, "Second PR_Accept() failed: (%d, %d)\n", PR_GetError(),
           PR_GetOSError());
   exit(1);
 }
 printf("accept: succeeded, good\n");
 fflush(stdout);
 PR_Close(listenSock);

 PR_SetSocketOption(sock, &optval);

 /* time 3, 5, 6, 8, etc. */
 for (i = 0; i < NUMBER_ROUNDS; i++) {
   PR_Sleep(unitTime);
   retVal = PR_Recv(sock, buf, sizeof(buf), 0, PR_INTERVAL_NO_TIMEOUT);
   if (retVal != -1 || PR_GetError() != PR_WOULD_BLOCK_ERROR) {
     PL_PrintError("First Receive:\n");
     fprintf(stderr, "First PR_Recv: retVal: %ld, Error: %ld\n", retVal,
             PR_GetError());
     exit(1);
   }
   printf("read: EWOULDBLOCK, good\n");
   fflush(stdout);
   PR_Sleep(2 * unitTime);
   retVal = PR_Recv(sock, buf, sizeof(buf), 0, PR_INTERVAL_NO_TIMEOUT);
   if (retVal != CHUNK_SIZE) {
     PL_PrintError("Second Receive:\n");
     fprintf(stderr, "Second PR_Recv: retVal: %ld, Error: %ld\n", retVal,
             PR_GetError());
     exit(1);
   }
   printf("read: %d bytes, good\n", retVal);
   fflush(stdout);
 }
 PR_Close(sock);

 printf("All tests finished\n");
 printf("PASS\n");
 return 0;
}

int main(int argc, char** argv) {
 PRIntn rv;

 rv = PR_Initialize(RealMain, argc, argv, 0);
 return rv;
} /* main */