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네트워크 2014.11.05 수업 준비
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#include <WinSock2.h> | |
#include <stdio.h> | |
int main(int argc, char **argv) { | |
WSADATA WSAData; | |
struct hostent *myent; | |
// B. 인터넷 주소를 가져오지 못할 경우 에러 처리. | |
if(argc != 2) { | |
printf("Usage : %s [ineternet address]\n", argv[0]); | |
WSACleanup(); | |
return 1; | |
} | |
if (WSAStartup (MAKEWORD(2,2), &WSAData) != 0) { | |
printf("WSAStartup failed\n"); | |
return 1; | |
} | |
myent = gethostbyname(argv[1]); | |
if(myent == NULL) { | |
printf("Not Found Domain Name.\n"); | |
return; | |
} | |
printf("Host Name : %s\n", myent->h_name); | |
// C. 여러 개의 인터넷 주소가 있을 때, 이를 모두 출력한다. | |
while(*myent->h_addr_list != NULL) { | |
printf("%s\n", inet_ntoa(*(struct in_addr *)*myent->h_addr_list)); | |
myent->h_addr_list++; | |
} | |
WSACleanup(); | |
return 0; | |
} |
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