1  #include <arpa/inet.h>
       2  #include <errno.h>
       3  #include <netinet/in.h>
       4  #include <stdio.h>
       5  #include <string.h>
       6  
       7  static int
       8  do_test (void)
       9  {
      10    struct in_addr addr4;
      11    struct in6_addr addr6;
      12    char buf[64];
      13    int result = 0;
      14  
      15    addr4.s_addr = 0xe0e0e0e0;
      16    addr6.s6_addr16[0] = 0;
      17    addr6.s6_addr16[1] = 0;
      18    addr6.s6_addr16[2] = 0;
      19    addr6.s6_addr16[3] = 0;
      20    addr6.s6_addr16[4] = 0;
      21    addr6.s6_addr16[5] = 0xffff;
      22    addr6.s6_addr32[3] = 0xe0e0e0e0;
      23    memset (buf, 'x', sizeof buf);
      24  
      25    if (inet_ntop (AF_INET, &addr4, buf, 15) != NULL)
      26      {
      27        puts ("1st inet_ntop returned non-NULL");
      28        result++;
      29      }
      30    else if (errno != ENOSPC)
      31      {
      32        puts ("1st inet_ntop didn't fail with ENOSPC");
      33        result++;
      34      }
      35    if (buf[15] != 'x')
      36      {
      37        puts ("1st inet_ntop wrote past the end of buffer");
      38        result++;
      39      }
      40  
      41    if (inet_ntop (AF_INET, &addr4, buf, 16) != buf)
      42      {
      43        puts ("2nd inet_ntop did not return buf");
      44        result++;
      45      }
      46    if (memcmp (buf, "224.224.224.224\0" "xxxxxxxx", 24) != 0)
      47      {
      48        puts ("2nd inet_ntop wrote past the end of buffer");
      49        result++;
      50      }
      51  
      52    if (inet_ntop (AF_INET6, &addr6, buf, 22) != NULL)
      53      {
      54        puts ("3rd inet_ntop returned non-NULL");
      55        result++;
      56      }
      57    else if (errno != ENOSPC)
      58      {
      59        puts ("3rd inet_ntop didn't fail with ENOSPC");
      60        result++;
      61      }
      62    if (buf[22] != 'x')
      63      {
      64        puts ("3rd inet_ntop wrote past the end of buffer");
      65        result++;
      66      }
      67  
      68    if (inet_ntop (AF_INET6, &addr6, buf, 23) != buf)
      69      {
      70        puts ("4th inet_ntop did not return buf");
      71        result++;
      72      }
      73    if (memcmp (buf, "::ffff:224.224.224.224\0" "xxxxxxxx", 31) != 0)
      74      {
      75        puts ("4th inet_ntop wrote past the end of buffer");
      76        result++;
      77      }
      78  
      79    memset (&addr6.s6_addr, 0xe0, sizeof (addr6.s6_addr));
      80  
      81    if (inet_ntop (AF_INET6, &addr6, buf, 39) != NULL)
      82      {
      83        puts ("5th inet_ntop returned non-NULL");
      84        result++;
      85      }
      86    else if (errno != ENOSPC)
      87      {
      88        puts ("5th inet_ntop didn't fail with ENOSPC");
      89        result++;
      90      }
      91    if (buf[39] != 'x')
      92      {
      93        puts ("5th inet_ntop wrote past the end of buffer");
      94        result++;
      95      }
      96  
      97    if (inet_ntop (AF_INET6, &addr6, buf, 40) != buf)
      98      {
      99        puts ("6th inet_ntop did not return buf");
     100        result++;
     101      }
     102    if (memcmp (buf, "e0e0:e0e0:e0e0:e0e0:e0e0:e0e0:e0e0:e0e0\0"
     103  		   "xxxxxxxx", 48) != 0)
     104      {
     105        puts ("6th inet_ntop wrote past the end of buffer");
     106        result++;
     107      }
     108  
     109  
     110    return result;
     111  }
     112  
     113  #define TEST_FUNCTION do_test ()
     114  #include "../test-skeleton.c"