root/maint/gnulib/tests/test-getsockname.c

/* */

DEFINITIONS

1. open_server_socket
2. main

   1 /* Test getsockname() function.
   2    Copyright (C) 2011-2021 Free Software Foundation, Inc.
   3 
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8 
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13 
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16 
  17 #include <config.h>
  18 
  19 #include <sys/socket.h>
  20 
  21 #include "signature.h"
  22 SIGNATURE_CHECK (getsockname, int, (int, struct sockaddr *, socklen_t *));
  23 
  24 #include <stdio.h>
  25 #include <string.h>
  26 #include <netinet/in.h>
  27 #include <arpa/inet.h>
  28 #include <unistd.h>
  29 #include <errno.h>
  30 
  31 #include "sockets.h"
  32 #include "macros.h"
  33 
  34 static int
  35 open_server_socket (void)
     /*  */
  36 {
  37   int s, x;
  38   struct sockaddr_in ia;
  39 
  40   s = socket (AF_INET, SOCK_STREAM, 0);
  41 
  42   x = 1;
  43   setsockopt (s, SOL_SOCKET, SO_REUSEPORT, &x, sizeof (x));
  44 
  45   memset (&ia, 0, sizeof (ia));
  46   ia.sin_family = AF_INET;
  47   inet_pton (AF_INET, "0.0.0.0", &ia.sin_addr);
  48   /* Port 0 means that the system should assign a port.  */
  49   ia.sin_port = htons (0);
  50   if (bind (s, (struct sockaddr *) &ia, sizeof (ia)) < 0)
  51     {
  52       perror ("bind");
  53       exit (77);
  54     }
  55 
  56   if (listen (s, 1) < 0)
  57     {
  58       perror ("listen");
  59       exit (77);
  60     }
  61 
  62   return s;
  63 }
  64 
  65 int
  66 main (void)
     /*  */
  67 {
  68   (void) gl_sockets_startup (SOCKETS_1_1);
  69 
  70   /* Test behaviour for invalid file descriptors.  */
  71   {
  72     struct sockaddr_in addr;
  73     socklen_t addrlen = sizeof (addr);
  74 
  75     errno = 0;
  76     ASSERT (getsockname (-1, (struct sockaddr *) &addr, &addrlen) == -1);
  77     ASSERT (errno == EBADF);
  78   }
  79   {
  80     struct sockaddr_in addr;
  81     socklen_t addrlen = sizeof (addr);
  82 
  83     close (99);
  84     errno = 0;
  85     ASSERT (getsockname (99, (struct sockaddr *) &addr, &addrlen) == -1);
  86     ASSERT (errno == EBADF);
  87   }
  88 
  89   /* Test behaviour for a server socket.  */
  90   {
  91     int s = open_server_socket ();
  92     struct sockaddr_in addr;
  93     socklen_t addrlen = sizeof (addr);
  94 
  95     memset (&addr, 0, sizeof (addr));
  96     ASSERT (getsockname (s, (struct sockaddr *) &addr, &addrlen) == 0);
  97     ASSERT (addr.sin_family == AF_INET);
  98     ASSERT (ntohs (addr.sin_port) != 0);
  99   }
 100 
 101   return 0;
 102 }

/* */