Package: libc6 Version: 2.18-4 Sometimes avahi-resolve-host-name and getaddrinfo(3) disagree about DNS. Sample: % avahi-resolve-host-name pepe.local; ./getaddrinfo pepe.local pepe.local 10.42.100.198 getaddrinfo: Name or service not known nscd is not running. /etc/nsswitch.conf says hosts: files mdns4_minimal [NOTFOUND=return] dns getaddrinfo.c is attached. Regards Harri
/*
* getaddrinfo.c - Simple example of using getaddrinfo(3) function.
*
* Michal Ludvig <michal@logix.cz> (c) 2002, 2003
* http://www.logix.cz/michal/devel/
*
* License: public domain.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
int
lookup_host (const char *host)
{
struct addrinfo hints, *res;
int errcode;
char addrstr[100];
void *ptr;
memset (&hints, 0, sizeof (hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags |= AI_CANONNAME;
errcode = getaddrinfo (host, NULL, &hints, &res);
if (errcode != 0)
{
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(errcode));
exit(EXIT_FAILURE);
}
printf ("Host: %s\n", host);
while (res)
{
inet_ntop (res->ai_family, res->ai_addr->sa_data, addrstr, 100);
switch (res->ai_family)
{
case AF_INET:
ptr = &((struct sockaddr_in *) res->ai_addr)->sin_addr;
break;
case AF_INET6:
ptr = &((struct sockaddr_in6 *) res->ai_addr)->sin6_addr;
break;
}
inet_ntop (res->ai_family, ptr, addrstr, 100);
printf ("IPv%d address: %s (%s)\n", res->ai_family == PF_INET6 ? 6 : 4,
addrstr, res->ai_canonname);
res = res->ai_next;
}
return 0;
}
int
main (int argc, char *argv[])
{
if (argc < 2)
exit (1);
return lookup_host (argv[1]);
}
Attachment:
signature.asc
Description: OpenPGP digital signature