Rescue a great god!!!!!!!!!! Through the IP access to equipment name within a local area network (LAN) function gethostbyaddr () returns all bogon, what to do!!

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#include  
#include  
#include  

//link with ws2_32. Lib 
# pragma comment (lib, "Ws2_32. Lib") 

Int __cdecl main (int arg c, char * * argv) 
{

//-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
//Declare and initialize variables 
WSADATA WSADATA=https://bbs.csdn.net/topics/{0}; 
Int iResult=0; 

DWORD dwRetval; 

Struct sockaddr_in saGNI; 
Char hostname [NI_MAXHOST]; 
Char servInfo [NI_MAXSERV]; 
U_short port=27015; 

//Validate the parameters 
If (arg c!=2) {
Printf (" IPv4 address usage: % s \ n ", argv [0]). 
Printf (" to return the hostname \ n "); 
127.0.0.1 printf (" % s \ n ", argv [0]). 
return 1; 
} 
//Initialize Winsock 
IResult=WSAStartup (MAKEWORD (2, 2), & amp; WsaData); 
If (iResult!=0) {
Printf (" WSAStartup failed: % d \ n ", iResult); 
return 1; 
} 
//-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
//Set up sockaddr_in structure which is passed 
//to the getnameinfo function 
SaGNI. Sin_family=AF_INET; 
SaGNI. Sin_addr. S_addr=inet_addr (argv [1]). 
SaGNI. Sin_port=htons (port); 

//-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
//Call getnameinfo 
DwRetval=getnameinfo ((struct sockaddr *) & amp; SaGNI, 
Sizeof (struct sockaddr), 
The hostname, 
NI_MAXHOST servInfo, NI_MAXSERV NI_NUMERICSERV); 

If (dwRetval!=0) {
Printf (" getnameinfo failed with the error # % ld \ n ", WSAGetLastError ()); 
return 1; 
} else {
Printf (" getnameinfo returned the hostname=% s \ n ", the hostname); 
return 0; 
} 
} 

CodePudding user response:

Solved the building Lord, I also encountered this problem, but use nbtstat command can get normal,