static void
test_ipv4_cidr(void)
{
assert(ip_is_cidr(htonl(0x00000000)));
assert(ip_is_cidr(htonl(0x80000000)));
assert(ip_is_cidr(htonl(0xf0000000)));
assert(ip_is_cidr(htonl(0xffffffe0)));
assert(ip_is_cidr(htonl(0xffffffff)));
assert(!ip_is_cidr(htonl(0x00000001)));
assert(!ip_is_cidr(htonl(0x40000000)));
assert(!ip_is_cidr(htonl(0x0fffffff)));
assert(!ip_is_cidr(htonl(0xffffffd0)));
}
void
ip_format_masked(ovs_be32 ip, ovs_be32 mask, struct ds *s)
{
ds_put_format(s, IP_FMT, IP_ARGS(&ip));
if (mask != htonl(UINT32_MAX)) {
if (ip_is_cidr(mask)) {
ds_put_format(s, "/%d", ip_count_cidr_bits(mask));
} else {
ds_put_format(s, "/"IP_FMT, IP_ARGS(&mask));
}
}
}
static void
lex_token_format_masked_integer(const struct lex_token *token, struct ds *s)
{
enum lex_format format = lex_token_get_format(token);
lex_token_format_value(&token->value, format, s);
ds_put_char(s, '/');
const union mf_subvalue *mask = &token->mask;
if (format == LEX_F_IPV4 && ip_is_cidr(mask->ipv4)) {
ds_put_format(s, "%d", ip_count_cidr_bits(mask->ipv4));
} else if (token->format == LEX_F_IPV6 && ipv6_is_cidr(&mask->ipv6)) {
ds_put_format(s, "%d", ipv6_count_cidr_bits(&mask->ipv6));
} else {
lex_token_format_value(&token->mask, format, s);
}
}
/* Given the IP netmask 'netmask', returns the number of bits of the IP address
* that it specifies, that is, the number of 1-bits in 'netmask'. 'netmask'
* must be a CIDR netmask (see ip_is_cidr()). */
int
ip_count_cidr_bits(ovs_be32 netmask)
{
assert(ip_is_cidr(netmask));
return 32 - ctz(ntohl(netmask));
}
