void init_constants(void)
{
happy(anyaddr(AF_INET, &ipv4_any));
happy(anyaddr(AF_INET6, &ipv6_any));
happy(addrtosubnet(&ipv4_any, &ipv4_wildcard));
happy(addrtosubnet(&ipv6_any, &ipv6_wildcard));
happy(initsubnet(&ipv4_any, 0, '0', &ipv4_all));
happy(initsubnet(&ipv6_any, 0, '0', &ipv6_all));
}
prefix_node *dag_network::add_address(const ip_address addr)
{
ip_subnet vs;
initsubnet(&addr, 128, 0, &vs);
return add_address(vs);
}
/*
- ttosubnet - convert text "addr/mask" to address and mask
* Mask can be integer bit count.
*/
err_t
ttosubnet(const char *src, size_t srclen,int af,ip_subnet *dst)
{
const char *slash;
const char *colon;
const char *mask;
size_t mlen;
const char *oops;
unsigned long bc;
static char def[] = DEFAULTSUBNET;
# define DEFLEN (sizeof(def) - 1) /* -1 for NUL */
static char defis4[] = "0/0";
# define DEFIS4LEN (sizeof(defis4) - 1)
static char defis6[] = "::/0";
# define DEFIS6LEN (sizeof(defis6) - 1)
ip_address addrtmp;
ip_address masktmp;
int nbits;
int i;
if (srclen == 0)
srclen = strlen(src);
if (srclen == 0)
return "empty string";
switch (af) {
case AF_INET:
nbits = 32;
break;
case AF_INET6:
nbits = 128;
break;
default:
return "unknown address family in ttosubnet";
break;
}
if (srclen == DEFLEN && strncmp(src, def, srclen) == 0) {
src = (af == AF_INET) ? defis4 : defis6;
srclen = (af == AF_INET) ? DEFIS4LEN : DEFIS6LEN;
}
slash = memchr(src, '/', srclen);
if (slash == NULL)
return "no / in subnet specification";
mask = slash + 1;
mlen = srclen - (mask - src);
oops = ttoaddr(src, slash-src, af, &addrtmp);
if (oops != NULL)
return oops;
/* extract port, as last : */
colon = memchr(mask, ':', mlen);
if (colon == 0)
{
setportof(0, &addrtmp);
}
else
{
unsigned long port;
oops = ttoul(colon+1, mlen-(colon-mask+1), 0, &port);
if (oops != NULL)
return oops;
setportof(htons(port), &addrtmp);
mlen = colon - mask;
}
/*extract mask */
oops = ttoul(mask, mlen, 10, &bc);
if (oops == NULL) {
/* ttoul succeeded, it's a bit-count mask */
if (bc > nbits)
return "subnet mask bit count too large";
i = bc;
} else if(af == AF_INET) {
oops = ttoaddr(mask, mlen, af, &masktmp);
if (oops != NULL)
return oops;
i = masktocount(&masktmp);
if (i < 0)
return "non-contiguous or otherwise erroneous mask";
} else {
return "masks are not permitted for IPv6 addresses";
}
return initsubnet(&addrtmp, i, '0', dst);
}
