krb5_error_code KRB5_LIB_FUNCTION
krb5_expand_hostname (krb5_context context,
const char *orig_hostname,
char **new_hostname)
{
struct addrinfo *ai, *a, hints;
int error;
if (!context->dns_canonicalize_hostname)
return copy_hostname (context, orig_hostname, new_hostname);
memset (&hints, 0, sizeof(hints));
hints.ai_flags = AI_CANONNAME;
error = getaddrinfo (orig_hostname, NULL, &hints, &ai);
if (error)
return copy_hostname (context, orig_hostname, new_hostname);
for (a = ai; a != NULL; a = a->ai_next) {
if (a->ai_canonname != NULL) {
*new_hostname = strdup (a->ai_canonname);
freeaddrinfo (ai);
if (*new_hostname == NULL) {
krb5_set_error_string(context, "malloc: out of memory");
return ENOMEM;
} else {
return 0;
}
}
}
freeaddrinfo (ai);
return copy_hostname (context, orig_hostname, new_hostname);
}
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_expand_hostname (krb5_context context,
const char *orig_hostname,
char **new_hostname)
{
struct addrinfo *ai, *a, hints;
int error;
if ((context->flags & KRB5_CTX_F_DNS_CANONICALIZE_HOSTNAME) == 0)
return copy_hostname (context, orig_hostname, new_hostname);
memset (&hints, 0, sizeof(hints));
hints.ai_flags = AI_CANONNAME;
error = getaddrinfo (orig_hostname, NULL, &hints, &ai);
if (error)
return copy_hostname (context, orig_hostname, new_hostname);
for (a = ai; a != NULL; a = a->ai_next) {
if (a->ai_canonname != NULL) {
*new_hostname = strdup (a->ai_canonname);
freeaddrinfo (ai);
if (*new_hostname == NULL) {
krb5_set_error_message(context, ENOMEM,
N_("malloc: out of memory", ""));
return ENOMEM;
} else {
return 0;
}
}
}
freeaddrinfo (ai);
return copy_hostname (context, orig_hostname, new_hostname);
}
static krb5_error_code
vanilla_hostname (krb5_context context,
const char *orig_hostname,
char **new_hostname,
char ***realms)
{
krb5_error_code ret;
ret = copy_hostname (context, orig_hostname, new_hostname);
if (ret)
return ret;
strlwr (*new_hostname);
ret = krb5_get_host_realm (context, *new_hostname, realms);
if (ret) {
free (*new_hostname);
return ret;
}
return 0;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_expand_hostname_realms (krb5_context context,
const char *orig_hostname,
char **new_hostname,
char ***realms)
{
struct addrinfo *ai, *a, hints;
int error;
krb5_error_code ret = 0;
if (!context->dns_canonicalize_hostname)
return vanilla_hostname (context, orig_hostname, new_hostname,
realms);
memset (&hints, 0, sizeof(hints));
hints.ai_flags = AI_CANONNAME;
error = getaddrinfo (orig_hostname, NULL, &hints, &ai);
if (error)
return vanilla_hostname (context, orig_hostname, new_hostname,
realms);
for (a = ai; a != NULL; a = a->ai_next) {
if (a->ai_canonname != NULL) {
ret = copy_hostname (context, a->ai_canonname, new_hostname);
if (ret) {
freeaddrinfo (ai);
return ret;
}
strlwr (*new_hostname);
ret = krb5_get_host_realm (context, *new_hostname, realms);
if (ret == 0) {
freeaddrinfo (ai);
return 0;
}
free (*new_hostname);
}
}
freeaddrinfo(ai);
return vanilla_hostname (context, orig_hostname, new_hostname, realms);
}
