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<DIV> <DIV class=tit><FONT size=2></FONT> </DIV> <TABLE style="TABLE-LAYOUT: fixed"> <TBODY> <TR> <TD> <DIV class=cnt id=blog_text> <P><FONT face=ËÎÌå><STRONG>Ò»¡¢WSAStartupº¯Êý</STRONG></FONT></P><FONT face=ËÎÌå><STRONG></STRONG> <P><BR><STRONG>int WSAStartup(</STRONG></FONT><A class=channel_keylink href="http://www.ttadd.com/diannao/ruanjian/bangong/word/index.html" target=_blank><FONT face=ËÎÌå color=#0000ff><STRONG>word</STRONG></FONT></A><FONT face=ËÎÌå><STRONG> wVersionRequested, LPWSADATA lpWSAData );</STRONG></FONT></P><FONT face=ËÎÌå><STRONG> <P><BR></STRONG> ʹÓÃSocketµÄ³ÌÐòÔÚʹÓÃSocket֮ǰ±ØÐëµ÷ÓÃWSAStartupº¯Êý¡£¸Ãº¯ÊýµÄµÚÒ»¸ö²ÎÊýÖ¸Ã÷³ÌÐòÇëÇóʹÓõÄSocket°æ±¾£¬ÆäÖиßλ×Ö½ÚÖ¸Ã÷¸±°æ±¾¡¢µÍλ×Ö½ÚÖ¸Ã÷Ö÷°æ±¾£»²Ù×÷ϵͳÀûÓõڶþ¸ö²ÎÊý·µ»ØÇëÇóµÄSocketµÄ°æ±¾ÐÅÏ¢¡£µ±Ò»¸öÓ¦ÓóÌÐòµ÷ÓÃWSAStartupº¯Êýʱ£¬²Ù×÷ϵͳ¸ù¾ÝÇëÇóµÄSocket°æ±¾À´ËÑË÷ÏàÓ¦µÄSocket¿â£¬È»ºó°ó¶¨ÕÒµ½µÄSocket¿âµ½¸ÃÓ¦ÓóÌÐòÖС£ÒÔºóÓ¦ÓóÌÐò¾Í¿ÉÒÔµ÷ÓÃËùÇëÇóµÄSocket¿âÖÐµÄÆäËüSocketº¯ÊýÁË¡£¸Ãº¯ÊýÖ´Ðгɡ¡
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gethostbynameÓ÷¨ zz
<BR> <SCRIPT>function StorePage(){d=document;t=d.selection?(d.selection.type!='None'?d.selection.createRange().text:''):(d.getSelection?d.getSelection():'');void(keyit=window.open('http://www.365key.com/storeit.aspx?t='+escape(d.title)+'&u='+escape(d.location.href)+'&c='+escape(t),'keyit','scrollbars=no,width=475,height=575,left=75,top=20,status=no,resizable=yes'));keyit.focus();}</SCRIPT> <DIV class=post> <DIV class=postTitle><A href="http://blog.csdn.net/leesphone/archive/2008/03/02/2138775.aspx"><FONT color=#810081 size=2> gethostbynameÓ÷¨</FONT></A><FONT size=2> <SCRIPT src="http://blog.csdn.net/count.aspx?ID=2138775&Type=Rank"></SCRIPT> </FONT> <DIV class=postText><FONT size=2>ʹÓÃÕâ¸ö¶«Î÷£¬Ê×ÏÈÒª°üº¬2¸öÍ·Îļþ£º<BR>#include <netdb.h><BR>#include <sys/socket.h><BR>struct hostent *gethostbyname(const char *name);<BR>Õâ¸öº¯ÊýµÄ´«ÈëÖµÊÇÓòÃû»òÕßÖ÷»úÃû£¬ÀýÈç"</FONT><A href="http://www.google.com%22,%22wpc/"><FONT color=#0000ff size=2>www.google.com","wpc</FONT></A><FONT size=2>"µÈµÈ¡£<BR>´«³öÖµ£¬ÊÇÒ»¸öhostentµÄ½á¹¹£¨ÈçÏ£©¡£Èç¹ûº¯Êýµ÷ÓÃʧ°Ü£¬½«·µ»ØNULL¡£<BR></FONT><FONT size=2><SPAN class=Code>struct hostent {<BR> char *h_name;<BR> char **h_aliases;<BR> int h_addrtype;<BR> int h_length;<BR> char **h_addr_list;<BR>};</SPAN><BR>½âÊÍÒ»ÏÂÕâ¸ö½á¹¹, ÆäÖÐ:<BR>char *h_name ±íʾµÄÊÇÖ÷»úµÄ¹æ·¶Ãû¡£ÀýÈç</FONT><A href="http://www.google.com/"><FONT color=#0000ff size=2>www.google.com</FONT></A><FONT size=2>µÄ¹æ·¶ÃûÆäʵÊÇ</FONT><A href="http://www.l.google.com/"><FONT color=#0000ff size=2>www.l.google.com</FONT></A><FONT size=2>¡£<BR>char **h_aliases ±íʾµÄÊÇÖ÷»úµÄ±ðÃû¡£</FONT><A href="http://www.google.com/"><FONT color=#0000ff size=2>www.google.com</FONT></A><FONT size=2>¾ÍÊÇgoogleËû×Ô¼ºµÄ±ðÃû¡£ÓеÄʱºò£¬ÓеÄÖ÷»ú¿ÉÄÜÓкü¸¸ö±ðÃû£¬ÕâЩ£¬Æäʵ¶¼ÊÇΪÁËÒ×ÓÚÓû§¼ÇÒä¶øÎª×Ô¼ºµÄÍøÕ¾¶àÈ¡µÄÃû×Ö¡£<BR>int h_addrtype ±íʾµÄÊÇÖ÷»úipµØÖ·µÄÀàÐÍ£¬µ½µ×ÊÇipv4(AF_INET)£¬»¹ÊÇipv6(AF_INET6)<BR>int h_length ±íʾµÄÊÇÖ÷»úipµØÖ·µÄ³¤¶È<BR>int **h_addr_lisst ±íʾµÄÊÇÖ÷»úµÄipµØÖ·£¬×¢Ò⣬Õâ¸öÊÇÒÔÍøÂç×Ö½ÚÐò´æ´¢µÄ¡£Ç§Íò²»ÒªÖ±½ÓÓÃprintf´ø%s²ÎÊýÀ´´òÕâ¸ö¶«Î÷£¬»áÓÐÎÊÌâµÄÍÛ¡£ËùÒÔµ½ÕæÕýÐèÒª´òÓ¡³öÕâ¸öIPµÄ»°£¬ÐèÒªµ÷ÓÃinet_ntop()¡£<BR>const char *inet_ntop(int af, const void *src, char *dst, socklen_t cnt) £º<BR>Õâ¸öº¯Êý£¬Êǽ«ÀàÐÍΪafµÄÍøÂçµØÖ·½á¹¹src£¬×ª»»³ÉÖ÷»úÐòµÄ×Ö·û´®ÐÎʽ£¬´æ·ÅÔÚ³¤¶ÈΪcntµÄ×Ö·û´®ÖС£<BR>Õâ¸öº¯Êý£¬Æäʵ¾ÍÊÇ·µ»ØÖ¸ÏòdstµÄÒ»¸öÖ¸Õë¡£Èç¹ûº¯Êýµ÷ÓôíÎ󣬷µ»ØÖµÊÇNULL¡£<BR>ÏÂÃæÊÇÀý³Ì£¬ÓÐÏêϸµÄ×¢ÊÍ¡£<BR></FONT><FONT size=2><SPAN class=Code>#include <netdb.h><BR>#include <sys/socket.h><BR>int main(int argc, char **argv)<BR>{<BR>char *ptr,**pptr;<BR>struct hostent *hptr;<BR>char str[32];<BR>/* È¡µÃÃüÁîºóµÚÒ»¸ö²ÎÊý£¬¼´Òª½âÎöµÄÓòÃû»òÖ÷»úÃû */<BR>ptr = argv[1];<BR>/* µ÷ÓÃgethostbyname()¡£µ÷Óýá¹û¶¼´æÔÚhptrÖÐ */<BR>if( (hptr = gethostbyname(ptr) ) == NULL )<BR>{<BR>printf("gethostbyname error for host:%s\n", ptr);<BR>return 0; /* Èç¹ûµ÷ÓÃgethostbyname·¢Éú´íÎ󣬷µ»Ø1 */<BR>}<BR>/* ½«Ö÷»úµÄ¹æ·¶Ãû´ò³öÀ´ */<BR>printf("official hostname:%s\n",hptr->h_name);<BR>/* Ö÷»ú¿ÉÄÜÓ%D
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