Hi,
the code aim is too display ip address of name passed in command line but the code is unable to link up
I am using dev-c++ and i have added library wsock32 and ws_s32
still it give link error for gai_strerror and inet_ntop
here is the code:
Any idea what i am missing???Code:01 /* 02 ** showip.c -- show IP addresses for a host given on the command line 03 */ 04 #include <stdio.h> 05 #include <string.h> 06 #include <windows.h> 07 #include <winsock2.h> 08 #include <ws2tcpip.h> 09 10 11 12 13 int main(int argc, char *argv[]) 14 {struct addrinfo hints, *res, *p; 15 int status; 16 char ipstr[INET6_ADDRSTRLEN]; 17 WSADATA wsaData; // if this doesn't work 18 //WSAData wsaData; // then try this instead 19 // MAKEWORD(1,1) for Winsock 1.1, MAKEWORD(2,0) for Winsock 2.0: 20 if (WSAStartup(MAKEWORD(2,0), &wsaData) != 0) { 21 fprintf(stderr, "WSAStartup failed.\n"); 22 exit(1); 23 } 24 if (argc != 2) { 25 fprintf(stderr,"usage: showip hostname\n"); 26 return 1; 27 } 28 memset(&hints, 0, sizeof hints); 29 hints.ai_family = AF_UNSPEC; // AF_INET or AF_INET6 to force version 30 hints.ai_socktype = SOCK_STREAM; 31 if ((status = getaddrinfo(argv[1], NULL, &hints, &res)) != 0) { 32 fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(status)); 33 return 2; 34 } 35 printf("IP addresses for %s:\n\n", argv[1]); 36 for(p = res;p != NULL; p = p->ai_next) { 37 void *addr; 38 char *ipver; 39 // get the pointer to the address itself, 40 // different fields in IPv4 and IPv6: 41 if (p->ai_family == AF_INET) { // IPv4 42 struct sockaddr_in *ipv4 = (struct sockaddr_in *)p->ai_addr; 43 addr = &(ipv4->sin_addr); 44 ipver = "IPv4"; 45 } else { // IPv6 46 struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)p->ai_addr; 47 addr = &(ipv6->sin6_addr); 48 ipver = "IPv6"; 49 } 50 // convert the IP to a string and print it: 51 inet_ntop(p->ai_family, addr, ipstr, sizeof ipstr); 52 printf(" %s: %s\n", ipver, ipstr); 53 } 54 freeaddrinfo(res); // free the linked list 55 WSACleanup(); 56 return 0; 57 }



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