tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

sockpong.c (2160B)

      1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this
      4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 /*
      7 * File: sockpong.c
      8 *
      9 * Description:
     10 * This test runs in conjunction with the sockping test.
     11 * The sockping test creates a socket pair and passes one
     12 * socket to this test.  Then the sockping test writes
     13 * "ping" to this test and this test writes "pong" back.
     14 * To run this pair of tests, just invoke sockping.
     15 *
     16 * Tested areas: process creation, socket pairs, file
     17 * descriptor inheritance.
     18 */
     19 
     20 #include "prerror.h"
     21 #include "prio.h"
     22 
     23 #include <stdio.h>
     24 #include <string.h>
     25 #include <stdlib.h>
     26 
     27 #define NUM_ITERATIONS 10
     28 
     29 int main(int argc, char** argv) {
     30  PRFileDesc* sock;
     31  PRStatus status;
     32  char buf[1024];
     33  PRInt32 nBytes;
     34  int idx;
     35 
     36  sock = PR_GetInheritedFD("SOCKET");
     37  if (sock == NULL) {
     38    fprintf(stderr, "PR_GetInheritedFD failed\n");
     39    exit(1);
     40  }
     41  status = PR_SetFDInheritable(sock, PR_FALSE);
     42  if (status == PR_FAILURE) {
     43    fprintf(stderr, "PR_SetFDInheritable failed\n");
     44    exit(1);
     45  }
     46 
     47  for (idx = 0; idx < NUM_ITERATIONS; idx++) {
     48    memset(buf, 0, sizeof(buf));
     49    nBytes = PR_Read(sock, buf, sizeof(buf));
     50    if (nBytes == -1) {
     51      fprintf(stderr, "PR_Read failed: (%d, %d)\n", PR_GetError(),
     52              PR_GetOSError());
     53      exit(1);
     54    }
     55    printf("pong process: received \"%s\"\n", buf);
     56    if (nBytes != 5) {
     57      fprintf(stderr, "pong process: expected 5 bytes but got %d bytes\n",
     58              nBytes);
     59      exit(1);
     60    }
     61    if (strcmp(buf, "ping") != 0) {
     62      fprintf(stderr, "pong process: expected \"ping\" but got \"%s\"\n", buf);
     63      exit(1);
     64    }
     65 
     66    strcpy(buf, "pong");
     67    printf("pong process: sending \"%s\"\n", buf);
     68    nBytes = PR_Write(sock, buf, 5);
     69    if (nBytes == -1) {
     70      fprintf(stderr, "PR_Write failed\n");
     71      exit(1);
     72    }
     73  }
     74 
     75  status = PR_Close(sock);
     76  if (status == PR_FAILURE) {
     77    fprintf(stderr, "PR_Close failed\n");
     78    exit(1);
     79  }
     80  return 0;
     81 }