/* Build a map from ra-names subnets to corresponding interfaces. This
is used to go from DHCPv4 leases to SLAAC addresses,
interface->IPv6-subnet, IPv6-subnet + MAC address -> SLAAC.
*/
static int add_subnet(struct in6_addr *local, int prefix,
int scope, int if_index, int dad, void *vparam)
{
struct dhcp_context *context;
(void)scope;
(void)dad;
(void)vparam;
for (context = daemon->ra_contexts; context; context = context->next)
if ((context->flags & CONTEXT_RA_NAME) &&
prefix == context->prefix &&
is_same_net6(local, &context->start6, prefix) &&
is_same_net6(local, &context->end6, prefix))
{
context->if_index = if_index;
context->local6 = *local;
}
return 1;
}
static struct cond_domain *search_domain6(struct in6_addr *addr, struct cond_domain *c)
{
u64 addrpart = addr6part(addr);
for (; c; c = c->next)
if (c->is6 &&
is_same_net6(addr, &c->start6, 64) &&
addrpart >= addr6part(&c->start6) &&
addrpart <= addr6part(&c->end6))
return c;
return NULL;
}
int is_name_synthetic(int flags, char *name, struct all_addr *addr)
{
char *p;
struct cond_domain *c = NULL;
int prot = AF_INET;
#ifdef HAVE_IPV6
if (flags & F_IPV6)
prot = AF_INET6;
#endif
for (c = daemon->synth_domains; c; c = c->next)
{
int found = 0;
char *tail, *pref;
for (tail = name, pref = c->prefix; *tail != 0 && pref && *pref != 0; tail++, pref++)
{
unsigned int c1 = (unsigned char) *pref;
unsigned int c2 = (unsigned char) *tail;
if (c1 >= 'A' && c1 <= 'Z')
c1 += 'a' - 'A';
if (c2 >= 'A' && c2 <= 'Z')
c2 += 'a' - 'A';
if (c1 != c2)
break;
}
if (pref && *pref != 0)
continue; /* prefix match fail */
/* NB, must not alter name if we return zero */
for (p = tail; *p; p++)
{
char c = *p;
if ((c >='0' && c <= '9') || c == '-')
continue;
#ifdef HAVE_IPV6
if (prot == AF_INET6 && ((c >='A' && c <= 'F') || (c >='a' && c <= 'f')))
continue;
#endif
break;
}
if (*p != '.')
continue;
*p = 0;
#ifdef HAVE_IPV6
if (prot == AF_INET6 && strstr(tail, "--ffff-") == tail)
{
/* special hack for v4-mapped. */
memcpy(tail, "::ffff:", 7);
for (p = tail + 7; *p; p++)
if (*p == '-')
*p = '.';
}
else
#endif
{
/* swap . or : for - */
for (p = tail; *p; p++)
if (*p == '-')
{
if (prot == AF_INET)
*p = '.';
#ifdef HAVE_IPV6
else
*p = ':';
#endif
}
}
if (hostname_isequal(c->domain, p+1) && inet_pton(prot, tail, addr))
{
if (prot == AF_INET)
{
if (!c->is6 &&
ntohl(addr->addr.addr4.s_addr) >= ntohl(c->start.s_addr) &&
ntohl(addr->addr.addr4.s_addr) <= ntohl(c->end.s_addr))
found = 1;
}
#ifdef HAVE_IPV6
else
{
u64 addrpart = addr6part(&addr->addr.addr6);
if (c->is6 &&
is_same_net6(&addr->addr.addr6, &c->start6, 64) &&
addrpart >= addr6part(&c->start6) &&
addrpart <= addr6part(&c->end6))
found = 1;
}
#endif
}
/* restore name */
for (p = tail; *p; p++)
if (*p == '.' || *p == ':')
*p = '-';
*p = '.';
if (found)
return 1;
}
return 0;
}
