#include <net/if.h>
-#include "networkd.h"
-#include "networkd-link.h"
-
#include "utf8.h"
#include "util.h"
#include "conf-parser.h"
-#include "network-internal.h"
+#include "fw-util.h"
+#include "networkd.h"
+#include "networkd-link.h"
static void address_init(Address *address) {
assert(address);
address->network = network;
- LIST_PREPEND(addresses, network->static_addresses, address);
+ LIST_APPEND(addresses, network->static_addresses, address);
if (section) {
address->section = section;
free(address);
}
+int address_establish(Address *address, Link *link) {
+ bool masq;
+ int r;
+
+ assert(address);
+ assert(link);
+
+ masq = link->network &&
+ link->network->ip_masquerade &&
+ address->family == AF_INET &&
+ address->scope < RT_SCOPE_LINK;
+
+ /* Add firewall entry if this is requested */
+ if (address->ip_masquerade_done != masq) {
+ union in_addr_union masked = address->in_addr;
+ in_addr_mask(address->family, &masked, address->prefixlen);
+
+ r = fw_add_masquerade(masq, AF_INET, 0, &masked, address->prefixlen, NULL, NULL, 0);
+ if (r < 0)
+ log_link_warning_errno(link, r, "Could not enable IP masquerading: %m");
+
+ address->ip_masquerade_done = masq;
+ }
+
+ return 0;
+}
+
+int address_release(Address *address, Link *link) {
+ int r;
+
+ assert(address);
+ assert(link);
+
+ /* Remove masquerading firewall entry if it was added */
+ if (address->ip_masquerade_done) {
+ union in_addr_union masked = address->in_addr;
+ in_addr_mask(address->family, &masked, address->prefixlen);
+
+ r = fw_add_masquerade(false, AF_INET, 0, &masked, address->prefixlen, NULL, NULL, 0);
+ if (r < 0)
+ log_link_warning_errno(link, r, "Failed to disable IP masquerading: %m");
+
+ address->ip_masquerade_done = false;
+ }
+
+ return 0;
+}
+
int address_drop(Address *address, Link *link,
sd_rtnl_message_handler_t callback) {
_cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
assert(link->manager);
assert(link->manager->rtnl);
+ address_release(address, link);
+
r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_DELADDR,
link->ifindex, address->family);
if (r < 0)
}
if (original->family == AF_INET) {
- /* Pick first address in range for ourselves ...*/
+ /* Pick first address in range for ourselves ... */
in_addr.in.s_addr = in_addr.in.s_addr | htobe32(1);
/* .. and use last as broadcast address */
link_ref(link);
+ address_establish(address, link);
+
return 0;
}
case AF_INET:
if (a1->prefixlen != a2->prefixlen)
return false;
+ else if (a1->prefixlen == 0)
+ /* make sure we don't try to shift by 32.
+ * See ISO/IEC 9899:TC3 ยง 6.5.7.3. */
+ return true;
else {
uint32_t b1, b2;
return (b1 >> (32 - a1->prefixlen)) == (b2 >> (32 - a1->prefixlen));
}
- case AF_INET6:
- {
+ case AF_INET6: {
uint64_t *b1, *b2;
b1 = (uint64_t*)&a1->in_addr.in6;
return (((b1[0] ^ b2[0]) | (b1[1] ^ b2[1])) == 0UL);
}
+
default:
assert_not_reached("Invalid address family");
}