C VC 語言 獲取本機IP位址

獲取本機所有ip位址

#include

#include
#include
#include
#pragma comment (lib, "ws2_32.lib")
void
get_host_ip()
int ret;
struct addrinfo hints;
struct addrinfo *res,
*cur;
struct sockaddr_in *addr;
char m_ipaddr[16]
;memset
(&hints,0,
sizeof
(struct addrinfo));
hints.ai_family = af_inet;
/* allow ipv4 */
hints.ai_flags = ai_passive;
/* for wildcard ip address */
hints.ai_protocol =0;
/* any protocol */
hints.ai_socktype = sock_dgram;
ret =
getaddrinfo(""
,null
,&hints,
&res);if
(ret ==-1
)for
(cur = res; cur !=
null
; cur = cur->ai_next)
freeaddrinfo
(res)
;wsacleanup()
;}intmain
(int argc,
char
**ar**)

//m_sock為csocket類物件

initinfo()
//獲取裝置名稱
sinfo& info = m_info;
gethostname
(info.shost,
sizeof
(info.shost));
//獲取本機ip位址
addrinfoa hints;
addrinfoa* result;
zeromemory
(&hints,
sizeof
(addrinfo));
hints.ai_family = af_inet;
hints.ai_protocol =0;
hints.ai_flags = ai_passive;
hints.ai_socktype = sock_dgram;
int res =
getaddrinfo
(info.shost,
null
,&hints,
&result)
; sockaddr_in* addr =
(sockaddr_in*
)result-
>ai_addr;
in_addr* ad =
(in_addr*
)&addr-
>sin_addr;
inet_ntop
(result-
>ai_family, ad, info.sip,
sizeof
(info.sip));
//獲取使用者名稱
dword dw =
sizeof
(info.sname)
;getusername
(info.sname,
&dw)
;//以255結尾的ip位址是虛擬ip，用於網段內**資料
cstring sip
(info.sip)
;int i = sip.
reversefind
('.');
sip = sip.
left
(i +1)
+_t("255");
spack pack =
;memcpy
(pack.data,
&info,
sizeof
(info));
m_sock.
sendto
(&pack,
sizeof
(info)
+sizeof
(int
), uport, sip)
;}

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