int
addr_pton_cidr(const char *p, struct xaddr *n, u_int *l)
{
struct xaddr tmp;
long unsigned int masklen = -1;
char addrbuf[64], *mp, *cp;
/* Don't modify argument */
if (p == NULL || strlcpy(addrbuf, p, sizeof(addrbuf)) > sizeof(addrbuf))
return (-1);
if ((mp = strchr(addrbuf, '/')) != NULL) {
*mp = '\0';
mp++;
masklen = strtoul(mp, &cp, 10);
if (*mp == '\0' || *cp != '\0' || masklen > 128)
return (-1);
}
if (addr_pton(addrbuf, &tmp) == -1)
return (-1);
if (mp == NULL)
masklen = addr_unicast_masklen(tmp.af);
if (masklen_valid(tmp.af, masklen) == -1)
return (-1);
if (n != NULL)
memcpy(n, &tmp, sizeof(*n));
if (l != NULL)
*l = masklen;
return (0);
}
/*
* Calculate a netmask of length 'l' for address family 'af' and
* store it in 'n'.
* Returns 0 on success, -1 on failure.
*/
static int
addr_netmask(int af, u_int l, struct xaddr *n)
{
int i;
if (masklen_valid(af, l) != 0 || n == NULL)
return -1;
memset(n, '\0', sizeof(*n));
switch (af) {
case AF_INET:
n->af = AF_INET;
n->v4.s_addr = htonl((0xffffffff << (32 - l)) & 0xffffffff);
return 0;
case AF_INET6:
n->af = AF_INET6;
for (i = 0; i < 4 && l >= 32; i++, l -= 32)
n->addr32[i] = 0xffffffffU;
if (i < 4 && l != 0)
n->addr32[i] = htonl((0xffffffff << (32 - l)) &
0xffffffff);
return 0;
default:
return -1;
}
}
int
addr_netmask(int af, u_int l, struct xaddr *n)
{
int i;
if (masklen_valid(af, l) != 0 || n == NULL)
return (-1);
memset(n, '\0', sizeof(*n));
switch (af) {
case AF_INET:
n->af = AF_INET;
n->v4.s_addr =
(l == 32) ? 0xffffffffUL : htonl(~(0xffffffffUL >> l));
return (0);
case AF_INET6:
n->af = AF_INET6;
for (i = 0; i < 4 && l >= 32; i++, l -= 32)
n->addr32[i] = 0xffffffffU;
if (i < 4 && l != 0)
n->addr32[i] = htonl(~(0xffffffffU >> l));
return (0);
default:
return (-1);
}
}
