Attachment 291104 Details for Bug 428067 – source for getnameinfo program which invokes getnameinfo function

source for getnameinfo program which invokes getnameinfo function

getnameinfo.c (text/plain), 2.09 KB, created by Leonardo Rodrigues on 2008-01-09 00:26:35 UTC

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Creator: Leonardo Rodrigues

Created: 2008-01-09 00:26:35 UTC

Size: 2.09 KB

patch

obsolete

> /*
>  * getnameinfo(3) (address->name lookup) tester.
>  * 
>  * Compile with:
>  * 
>  * cc -o getnameinfo getnameinfo.c (BSD, Linux)
>  * 
>  * cc -o getnameinfo getnameinfo.c -lsocket -lnsl (SunOS 5.x)
>  * 
>  * Run as: getnameinfo address
>  * 
>  * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
>  * 
>  * Author: Wietse Venema, IBM T.J. Watson Research, USA.
>  */
>#include <sys/types.h>
>#include <sys/socket.h>
>#include <netinet/in.h>
>#include <arpa/inet.h>
>#include <netdb.h>
>#include <stdio.h>
>#include <unistd.h>
>#include <string.h>
>#include <stdlib.h>
>
>int     main(int argc, char **argv)
>{
>    char    hostbuf[NI_MAXHOST];	/* XXX */
>    struct addrinfo hints;
>    struct addrinfo *res0;
>    struct addrinfo *res;
>    const char *host;
>    const char *addr;
>    int     err;
>
>#define NO_SERVICE ((char *) 0)
>
>    if (argc != 2) {
>	fprintf(stderr, "usage: %s ipaddres\n", argv[0]);
>	exit(1);
>    }
>
>    /*
>     * Convert address to internal form.
>     */
>    host = argv[1];
>    memset((char *) &hints, 0, sizeof(hints));
>    hints.ai_family = (strchr(host, ':') ? AF_INET6 : AF_INET);
>    hints.ai_socktype = SOCK_STREAM;
>    hints.ai_flags |= AI_NUMERICHOST;
>    if ((err = getaddrinfo(host, NO_SERVICE, &hints, &res0)) != 0) {
>	fprintf(stderr, "getaddrinfo %s: %s\n", host, gai_strerror(err));
>	exit(1);
>    }
>
>    /*
>     * Convert host address to name.
>     */
>    for (res = res0; res != 0; res = res->ai_next) {
>	err = getnameinfo(res->ai_addr, res->ai_addrlen,
>			  hostbuf, sizeof(hostbuf),
>			  NO_SERVICE, 0, NI_NAMEREQD);
>	if (err) {
>	    fprintf(stderr, "getnameinfo %s: %s\n", host, gai_strerror(err));
>	    exit(1);
>	}
>	printf("Hostname:\t%s\n", hostbuf);
>	addr = (res->ai_family == AF_INET ?
>		(char *) &((struct sockaddr_in *) res->ai_addr)->sin_addr :
>		(char *) &((struct sockaddr_in6 *) res->ai_addr)->sin6_addr);
>	if (inet_ntop(res->ai_family, addr, hostbuf, sizeof(hostbuf)) == 0) {
>	    perror("inet_ntop:");
>	    exit(1);
>	}
>	printf("Address:\t%s\n", hostbuf);
>    }
>    freeaddrinfo(res0);
>    exit(0);
>}

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Attachments on bug 428067: 291104 | 291105 | 296020