C++博客-INRG'S BLOG-文章分类-经典代码http://www.cppblog.com/inrg/category/19754.htmlzh-cnMon, 06 Aug 2012 01:56:59 GMTMon, 06 Aug 2012 01:56:59 GMT60struct in_addrhttp://www.cppblog.com/inrg/articles/186240.html大喜头大喜头Sat, 04 Aug 2012 03:09:00 GMThttp://www.cppblog.com/inrg/articles/186240.htmlhttp://www.cppblog.com/inrg/comments/186240.htmlhttp://www.cppblog.com/inrg/articles/186240.html#Feedback0http://www.cppblog.com/inrg/comments/commentRss/186240.htmlhttp://www.cppblog.com/inrg/services/trackbacks/186240.html 1 struct in_addr {
 2         union {
 3                 struct { u_char s_b1,s_b2,s_b3,s_b4; } S_un_b;
 4                 struct { u_short s_w1,s_w2; } S_un_w;
 5                 u_long S_addr;
 6         } S_un;
 7 #define s_addr  S_un.S_addr
 8                                 /* can be used for most tcp & ip code */
 9 #define s_host  S_un.S_un_b.s_b2
10                                 /* host on imp */
11 #define s_net   S_un.S_un_b.s_b1
12                                 /* network */
13 #define s_imp   S_un.S_un_w.s_w2
14                                 /* imp */
15 #define s_impno S_un.S_un_b.s_b4
16                                 /* imp # */
17 #define s_lh    S_un.S_un_b.s_b3
18                                 /* logical host */
19 };
20 
21 s_addr_in.sin_addr.s_addr = inet_addr("220.181.111.85");

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