1: #include <stdio.h>
    2: #include <sys/socket.h>
    3: #include <netinet/in.h>
    4: #include <arpa/inet.h>
    5: 
    6: 
    7: static struct tests
    8: {
    9:   const char *input;
   10:   int valid;
   11:   uint32_t result;
   12: } tests[] =
   13: {
   14:   { "", 0, 0 },
   15:   { "-1", 0, 0 },
   16:   { "256", 1, 0x00000100 },
   17:   { "256.", 0, 0 },
   18:   { "256a", 0, 0 },
   19:   { "0x100", 1, 0x00000100 },
   20:   { "0200.0x123456", 1, 0x80123456 },
   21:   { "0300.0x89123456.", 0 ,0 },
   22:   { "0100.-0xffff0000", 0, 0 },
   23:   { "0.0xffffff", 1, 0x00ffffff },
   24:   { "0.0x1000000", 0, 0 },
   25:   { "0377.16777215", 1, 0xffffffff },
   26:   { "0377.16777216", 0, 0 },
   27:   { "0x87.077777777", 1, 0x87ffffff },
   28:   { "0x87.0100000000", 0, 0 },
   29:   { "0.1.3", 1, 0x00010003 },
   30:   { "0.256.3", 0, 0 },
   31:   { "256.1.3", 0, 0 },
   32:   { "0.1.0x10000", 0, 0 },
   33:   { "0.1.0xffff", 1, 0x0001ffff },
   34:   { "0.1a.3", 0, 0 },
   35:   { "0.1.a3", 0, 0 },
   36:   { "1.2.3.4", 1, 0x01020304 },
   37:   { "0400.2.3.4", 0, 0 },
   38:   { "1.0x100.3.4", 0, 0 },
   39:   { "1.2.256.4", 0, 0 },
   40:   { "1.2.3.0x100", 0, 0 },
   41:   { "323543357756889", 0, 0 },
   42:   { "10.1.2.3.4", 0, 0},
   43: };
   44: 
   45: 
   46: int
   47: main (int argc, char *argv[])
   48: {
   49:   int result = 0;
   50:   size_t cnt;
   51: 
   52:   for (cnt = 0; cnt < sizeof (tests) / sizeof (tests[0]); ++cnt)
   53:     {
   54:       struct in_addr addr;
   55: 
   56:       if ((int) inet_aton (tests[cnt].input, &addr) != tests[cnt].valid)
   57:         {
   58:           if (tests[cnt].valid)
   59:             printf ("\"%s\" not seen as valid IP address\n", tests[cnt].input);
   60:           else
   61:             printf ("\"%s\" seen as valid IP address\n", tests[cnt].input);
   62:           result = 1;
   63:         }
   64:       else if (tests[cnt].valid && addr.s_addr != ntohl (tests[cnt].result))
   65:         {
   66:           printf ("\"%s\" not converted correctly: is %08x, should be %08x\n",
   67:                   tests[cnt].input, addr.s_addr, tests[cnt].result);
   68:           result = 1;
   69:         }
   70:     }
   71: 
   72:   return result;
   73: }