IP相關(guān)的一些代碼

#include2?#include3?
?4?#define?IP_STR_LEN?????18
?5?#define?MAC_STR_LEN????18
?6?#define?MAC_BIT_LEN????6
?7?#define?LITTLE_ENDIAN??0
?8?#define?BIG_ENDIAN?????1
?9?
10?typedef?unsigned?char??uchar;
11?typedef?unsigned?int???uint;
12?
13?int?big_little_endian()
14?{
15?????int?data?=?0x1;
16?????if?(*((char*)&data)?==?0x1)
17?????return?LITTLE_ENDIAN;
18?????return?BIG_ENDIAN;
19?}
20?
21?uint?ipstr2int(const?char?*?ipstr)
22?{
23?????assert(ipstr);
24?????uint?a,b,c,d;
25?????uint?ip?=?0;
26?????sscanf(ipstr,"%u.%u.%u.%u",&a,&b,&c,&d);
27?????a?=?(a?<<?24)?;
28?????b?=?(b?<<?16)?;
29?????c?=?(c?<<?8)?;
30?????d?=?(d?<<?0)?;
31?????ip?=?a?|?b?|?c?|?d;
32?????return?ip;
33?}
34?
35?char?*int2ipstr(const?uint?ip,?char?*ipstr,?const?uint?ip_str_len)
36?{
37?????assert(ipstr);
38?????if?(big_little_endian()?==?LITTLE_ENDIAN)
39?????sprintf(ipstr,"%u.%u.%u.%u",
40?????????(uchar)*((char*)(&ip)+3),
41?????????(uchar)*((char*)(&ip)+2),
42?????????(uchar)*((char*)(&ip)+1),
43?????????(uchar)*((char*)(&ip)+0));
44?????else
45?????sprintf(ipstr,"%u.%u.%u.%u",
46?????????(uchar)*((char*)(&ip)+0),
47?????????(uchar)*((char*)(&ip)+1),
48?????????(uchar)*((char*)(&ip)+2),
49?????????(uchar)*((char*)(&ip)+3));
50?
51?????return?ipstr;
52?}
53?
55?char?*mac2str(const?unsigned?char?*mac,char?*mac_str,const?uint?mac_str_len)
56?{
57?????assert(mac_str);
58?????sprintf(mac_str,"%02X-%02X-%02X-%02X-%02X-%02X",
59?????????mac[0],mac[1],mac[2],
60?????????mac[3],mac[4],mac[5]);
61?}
62?
63?int?main()
64?{
65?????char??ip_str[IP_STR_LEN]?=?{0};
66?????char??mac_str[MAC_STR_LEN]?=?{0};
67?????unsigned?char?mac[MAC_BIT_LEN]?=?{0XEF,0XAD,0XF4,0X4F,0XAA,0X0F};
68?????const?char?*ipstr?=?"10.0.3.193";
69?????unsigned?int?ip;
70?????int2ipstr(167773121,ip_str,IP_STR_LEN);
71?????mac2str(mac,mac_str,MAC_STR_LEN);
72?????ip?=?ipstr2int(ipstr);
73?????printf("%sn",ip_str);
74?????printf("%sn",mac_str);
75?????printf("ip:%un",ip);
76?????return?0;
77?}