/**
* Write a DLEP IPv4/IPv6 address/subnet TLV
* @param writer dlep writer
* @param ip IPv4 address
* @param add true if address should be added, false to remove it
*/
int
dlep_writer_add_ip_tlv(struct dlep_writer *writer, const struct netaddr *ip, bool add) {
uint8_t value[18];
value[0] = add ? DLEP_IP_ADD : DLEP_IP_REMOVE;
netaddr_to_binary(&value[1], ip, 16);
switch (netaddr_get_address_family(ip)) {
case AF_INET:
value[5] = netaddr_get_prefix_length(ip);
if (value[5] != 32) {
dlep_writer_add_tlv(writer, DLEP_IPV4_SUBNET_TLV, value, 6);
}
else {
dlep_writer_add_tlv(writer, DLEP_IPV4_ADDRESS_TLV, value, 5);
}
break;
case AF_INET6:
value[17] = netaddr_get_prefix_length(ip);
if (value[17] != 128) {
dlep_writer_add_tlv(writer, DLEP_IPV6_SUBNET_TLV, value, 18);
}
else {
dlep_writer_add_tlv(writer, DLEP_IPV6_ADDRESS_TLV, value, 17);
}
break;
default:
return -1;
}
return 0;
}
/**
* Validate if a value against a specific network address
* @param out output buffer for error messages
* @param section_name name of configuration section
* @param entry_name name of configuration entry
* @param value value that needs to be validated
* @param prefix true if the address might be a network prefix
* @param af_types list of address families the address might be
* @param af_types_count number of address families specified
* @return 0 if value is valid, -1 otherwise
*/
int
cfg_validate_netaddr(struct autobuf *out, const char *section_name,
const char *entry_name, const char *value,
bool prefix, const int8_t *af_types, size_t af_types_count) {
struct netaddr addr;
uint8_t max_prefix;
size_t i;
if (netaddr_from_string(&addr, value)) {
cfg_append_printable_line(out, "Value '%s' for entry '%s'"
" in section %s is no valid network address",
value, entry_name, section_name);
return -1;
}
max_prefix = netaddr_get_maxprefix(&addr);
/* check prefix length */
if (netaddr_get_prefix_length(&addr) > max_prefix) {
cfg_append_printable_line(out, "Value '%s' for entry '%s'"
" in section %s has an illegal prefix length",
value, entry_name, section_name);
return -1;
}
if (!prefix && netaddr_get_prefix_length(&addr) != max_prefix) {
cfg_append_printable_line(out, "Value '%s' for entry '%s'"
" in section %s must be a single address, not a prefix",
value, entry_name, section_name);
return -1;
}
for (i=0; i<af_types_count; i++) {
if (af_types[i] == netaddr_get_address_family(&addr)) {
return 0;
}
}
/* at least one condition was set, but no one matched */
cfg_append_printable_line(out, "Value '%s' for entry '%s'"
" in section '%s' is wrong address type",
value, entry_name, section_name);
return -1;
}
