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#ifndef __IPV6_DNS_H
#define __IPV6_DNS_H
#include <netinet/in.h>
#include "ap_session.h"
#define IPV6_DNS_INITIAL_CAPACITY 4
struct ipv6_dns_t {
struct in6_addr *addr;
unsigned int count;
unsigned int capacity;
};
int ipv6_dns_reserve(struct ipv6_dns_t *dns, unsigned int count);
/*
* Pick the IPv6 DNS servers to advertise to a session.
*
* A session may have been assigned its own servers (currently by the radius
* module, from the DNS-Server-IPv6-Address attribute of RFC 6911); those take
* precedence. Sessions without any fall back to the globally configured ones,
* which is what every session got before per session servers existed.
*
* The selected array is returned and its length is written to 'count'.
* Callers advertise nothing when the returned count is 0.
*/
static inline const struct in6_addr *ipv6_dns_get(const struct ap_session *ses,
const struct in6_addr *conf_dns,
int conf_dns_count, int *count)
{
if (ses && ses->ipv6_dns && ses->ipv6_dns->count) {
*count = ses->ipv6_dns->count;
return ses->ipv6_dns->addr;
}
*count = conf_dns_count;
return conf_dns;
}
#endif
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