}
static void
-ip4_add_interface_routes (u32 sw_if_index,
- ip4_main_t * im, u32 fib_index,
- ip_interface_address_t * a)
+ip4_add_interface_prefix_routes (ip4_main_t *im,
+ u32 sw_if_index,
+ u32 fib_index,
+ ip_interface_address_t * a)
{
ip_lookup_main_t *lm = &im->lookup_main;
+ ip_interface_prefix_t *if_prefix;
ip4_address_t *address = ip_interface_address_get_address (lm, a);
- fib_prefix_t pfx = {
- .fp_len = a->address_length,
+
+ ip_interface_prefix_key_t key = {
+ .prefix = {
+ .fp_len = a->address_length,
+ .fp_proto = FIB_PROTOCOL_IP4,
+ .fp_addr.ip4.as_u32 = address->as_u32 & im->fib_masks[a->address_length],
+ },
+ .sw_if_index = sw_if_index,
+ };
+
+ fib_prefix_t pfx_special = {
.fp_proto = FIB_PROTOCOL_IP4,
- .fp_addr.ip4 = *address,
};
- if (pfx.fp_len <= 30)
+ /* If prefix already set on interface, just increment ref count & return */
+ if_prefix = ip_get_interface_prefix (lm, &key);
+ if (if_prefix)
{
- /* a /30 or shorter - add a glean for the network address */
- fib_table_entry_update_one_path (fib_index, &pfx,
- FIB_SOURCE_INTERFACE,
- (FIB_ENTRY_FLAG_CONNECTED |
- FIB_ENTRY_FLAG_ATTACHED),
- DPO_PROTO_IP4,
- /* No next-hop address */
- NULL,
- sw_if_index,
- // invalid FIB index
+ if_prefix->ref_count += 1;
+ return;
+ }
+
+ /* New prefix - allocate a pool entry, initialize it, add to the hash */
+ pool_get (lm->if_prefix_pool, if_prefix);
+ if_prefix->ref_count = 1;
+ if_prefix->src_ia_index = a - lm->if_address_pool;
+ clib_memcpy (&if_prefix->key, &key, sizeof (key));
+ mhash_set (&lm->prefix_to_if_prefix_index, &key,
+ if_prefix - lm->if_prefix_pool, 0 /* old value */);
+
+ /* length <= 30 - add glean, drop first address, maybe drop bcast address */
+ if (a->address_length <= 30)
+ {
+ pfx_special.fp_len = a->address_length;
+ pfx_special.fp_addr.ip4.as_u32 = address->as_u32;
+
+ /* set the glean route for the prefix */
+ fib_table_entry_update_one_path (fib_index, &pfx_special,
+ FIB_SOURCE_INTERFACE,
+ (FIB_ENTRY_FLAG_CONNECTED |
+ FIB_ENTRY_FLAG_ATTACHED),
+ DPO_PROTO_IP4,
+ /* No next-hop address */
+ NULL,
+ sw_if_index,
+ /* invalid FIB index */
~0,
1,
- // no out-label stack
+ /* no out-label stack */
NULL,
FIB_ROUTE_PATH_FLAG_NONE);
- /* Add the two broadcast addresses as drop */
- fib_prefix_t net_pfx = {
- .fp_len = 32,
- .fp_proto = FIB_PROTOCOL_IP4,
- .fp_addr.ip4.as_u32 = address->as_u32 & im->fib_masks[pfx.fp_len],
- };
- if (net_pfx.fp_addr.ip4.as_u32 != pfx.fp_addr.ip4.as_u32)
- fib_table_entry_special_add(fib_index,
- &net_pfx,
- FIB_SOURCE_INTERFACE,
- (FIB_ENTRY_FLAG_DROP |
- FIB_ENTRY_FLAG_LOOSE_URPF_EXEMPT));
- net_pfx.fp_addr.ip4.as_u32 |= ~im->fib_masks[pfx.fp_len];
- if (net_pfx.fp_addr.ip4.as_u32 != pfx.fp_addr.ip4.as_u32)
- ip4_add_subnet_bcast_route(fib_index, &net_pfx, sw_if_index);
- }
- else if (pfx.fp_len == 31)
- {
- u32 mask = clib_host_to_net_u32(1);
- fib_prefix_t net_pfx = pfx;
+ /* set a drop route for the base address of the prefix */
+ pfx_special.fp_len = 32;
+ pfx_special.fp_addr.ip4.as_u32 =
+ address->as_u32 & im->fib_masks[a->address_length];
- net_pfx.fp_len = 32;
- net_pfx.fp_addr.ip4.as_u32 ^= mask;
+ if (pfx_special.fp_addr.ip4.as_u32 != address->as_u32)
+ fib_table_entry_special_add (fib_index, &pfx_special,
+ FIB_SOURCE_INTERFACE,
+ (FIB_ENTRY_FLAG_DROP |
+ FIB_ENTRY_FLAG_LOOSE_URPF_EXEMPT));
- /* a /31 - add the other end as an attached host */
- fib_table_entry_update_one_path (fib_index, &net_pfx,
- FIB_SOURCE_INTERFACE,
- (FIB_ENTRY_FLAG_ATTACHED),
- DPO_PROTO_IP4,
- &net_pfx.fp_addr,
- sw_if_index,
- // invalid FIB index
+ /* set a route for the broadcast address of the prefix */
+ pfx_special.fp_len = 32;
+ pfx_special.fp_addr.ip4.as_u32 =
+ address->as_u32 | ~im->fib_masks[a->address_length];
+ if (pfx_special.fp_addr.ip4.as_u32 != address->as_u32)
+ ip4_add_subnet_bcast_route (fib_index, &pfx_special, sw_if_index);
+
+
+ }
+ /* length == 31 - add an attached route for the other address */
+ else if (a->address_length == 31)
+ {
+ pfx_special.fp_len = 32;
+ pfx_special.fp_addr.ip4.as_u32 =
+ address->as_u32 ^ clib_host_to_net_u32(1);
+
+ fib_table_entry_update_one_path (fib_index, &pfx_special,
+ FIB_SOURCE_INTERFACE,
+ (FIB_ENTRY_FLAG_ATTACHED),
+ DPO_PROTO_IP4,
+ &pfx_special.fp_addr,
+ sw_if_index,
+ /* invalid FIB index */
~0,
1,
NULL,
FIB_ROUTE_PATH_FLAG_NONE);
}
- pfx.fp_len = 32;
+}
+
+static void
+ip4_add_interface_routes (u32 sw_if_index,
+ ip4_main_t * im, u32 fib_index,
+ ip_interface_address_t * a)
+{
+ ip_lookup_main_t *lm = &im->lookup_main;
+ ip4_address_t *address = ip_interface_address_get_address (lm, a);
+ fib_prefix_t pfx = {
+ .fp_len = 32,
+ .fp_proto = FIB_PROTOCOL_IP4,
+ .fp_addr.ip4 = *address,
+ };
+
+ /* set special routes for the prefix if needed */
+ ip4_add_interface_prefix_routes (im, sw_if_index, fib_index, a);
if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
{
}
static void
-ip4_del_interface_routes (ip4_main_t * im,
- u32 fib_index,
- ip4_address_t * address, u32 address_length)
+ip4_del_interface_prefix_routes (ip4_main_t * im,
+ u32 sw_if_index,
+ u32 fib_index,
+ ip4_address_t * address,
+ u32 address_length)
{
- fib_prefix_t pfx = {
- .fp_len = address_length,
+ ip_lookup_main_t *lm = &im->lookup_main;
+ ip_interface_prefix_t *if_prefix;
+
+ ip_interface_prefix_key_t key = {
+ .prefix = {
+ .fp_len = address_length,
+ .fp_proto = FIB_PROTOCOL_IP4,
+ .fp_addr.ip4.as_u32 = address->as_u32 & im->fib_masks[address_length],
+ },
+ .sw_if_index = sw_if_index,
+ };
+
+ fib_prefix_t pfx_special = {
+ .fp_len = 32,
.fp_proto = FIB_PROTOCOL_IP4,
- .fp_addr.ip4 = *address,
};
- if (pfx.fp_len <= 30)
+ if_prefix = ip_get_interface_prefix (lm, &key);
+ if (!if_prefix)
{
- fib_prefix_t net_pfx = {
- .fp_len = 32,
- .fp_proto = FIB_PROTOCOL_IP4,
- .fp_addr.ip4.as_u32 = address->as_u32 & im->fib_masks[pfx.fp_len],
- };
- if (net_pfx.fp_addr.ip4.as_u32 != pfx.fp_addr.ip4.as_u32)
- fib_table_entry_special_remove(fib_index,
- &net_pfx,
- FIB_SOURCE_INTERFACE);
- net_pfx.fp_addr.ip4.as_u32 |= ~im->fib_masks[pfx.fp_len];
- if (net_pfx.fp_addr.ip4.as_u32 != pfx.fp_addr.ip4.as_u32)
- fib_table_entry_special_remove(fib_index,
- &net_pfx,
- FIB_SOURCE_INTERFACE);
- fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
+ clib_warning ("Prefix not found while deleting %U",
+ format_ip4_address_and_length, address, address_length);
+ return;
}
- else if (pfx.fp_len == 31)
+
+ if_prefix->ref_count -= 1;
+
+ /*
+ * Routes need to be adjusted if:
+ * - deleting last intf addr in prefix
+ * - deleting intf addr used as default source address in glean adjacency
+ *
+ * We're done now otherwise
+ */
+ if ((if_prefix->ref_count > 0) &&
+ !pool_is_free_index (lm->if_address_pool, if_prefix->src_ia_index))
+ return;
+
+ /* length <= 30, delete glean route, first address, last address */
+ if (address_length <= 30)
{
- u32 mask = clib_host_to_net_u32(1);
- fib_prefix_t net_pfx = pfx;
- net_pfx.fp_len = 32;
- net_pfx.fp_addr.ip4.as_u32 ^= mask;
+ /* remove glean route for prefix */
+ pfx_special.fp_addr.ip4 = *address;
+ pfx_special.fp_len = address_length;
+ fib_table_entry_delete (fib_index, &pfx_special, FIB_SOURCE_INTERFACE);
+
+ /* if no more intf addresses in prefix, remove other special routes */
+ if (!if_prefix->ref_count)
+ {
+ /* first address in prefix */
+ pfx_special.fp_addr.ip4.as_u32 =
+ address->as_u32 & im->fib_masks[address_length];
+ pfx_special.fp_len = 32;
+
+ if (pfx_special.fp_addr.ip4.as_u32 != address->as_u32)
+ fib_table_entry_special_remove (fib_index,
+ &pfx_special,
+ FIB_SOURCE_INTERFACE);
+
+ /* prefix broadcast address */
+ pfx_special.fp_addr.ip4.as_u32 =
+ address->as_u32 | ~im->fib_masks[address_length];
+ pfx_special.fp_len = 32;
- fib_table_entry_delete (fib_index, &net_pfx, FIB_SOURCE_INTERFACE);
+ if (pfx_special.fp_addr.ip4.as_u32 != address->as_u32)
+ fib_table_entry_special_remove (fib_index,
+ &pfx_special,
+ FIB_SOURCE_INTERFACE);
+ }
+ else
+ /* default source addr just got deleted, find another */
+ {
+ ip_interface_address_t *new_src_ia = NULL;
+ ip4_address_t *new_src_addr = NULL;
+
+ new_src_addr =
+ ip4_interface_address_matching_destination
+ (im, address, sw_if_index, &new_src_ia);
+
+ if_prefix->src_ia_index = new_src_ia - lm->if_address_pool;
+
+ pfx_special.fp_len = address_length;
+ pfx_special.fp_addr.ip4 = *new_src_addr;
+
+ /* set new glean route for the prefix */
+ fib_table_entry_update_one_path (fib_index, &pfx_special,
+ FIB_SOURCE_INTERFACE,
+ (FIB_ENTRY_FLAG_CONNECTED |
+ FIB_ENTRY_FLAG_ATTACHED),
+ DPO_PROTO_IP4,
+ /* No next-hop address */
+ NULL,
+ sw_if_index,
+ /* invalid FIB index */
+ ~0,
+ 1,
+ /* no out-label stack */
+ NULL,
+ FIB_ROUTE_PATH_FLAG_NONE);
+ return;
+ }
+ }
+ /* length == 31, delete attached route for the other address */
+ else if (address_length == 31)
+ {
+ pfx_special.fp_addr.ip4.as_u32 =
+ address->as_u32 ^ clib_host_to_net_u32(1);
+
+ fib_table_entry_delete (fib_index, &pfx_special, FIB_SOURCE_INTERFACE);
}
+ mhash_unset (&lm->prefix_to_if_prefix_index, &key, 0 /* old_value */);
+ pool_put (lm->if_prefix_pool, if_prefix);
+}
+
+static void
+ip4_del_interface_routes (u32 sw_if_index,
+ ip4_main_t * im,
+ u32 fib_index,
+ ip4_address_t * address, u32 address_length)
+{
+ fib_prefix_t pfx = {
+ .fp_len = address_length,
+ .fp_proto = FIB_PROTOCOL_IP4,
+ .fp_addr.ip4 = *address,
+ };
+
+ ip4_del_interface_prefix_routes (im, sw_if_index, fib_index,
+ address, address_length);
+
pfx.fp_len = 32;
fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
}
address,
address_length))
{
+ /* an intf may have >1 addr from the same prefix */
+ if ((sw_if_index == sif->sw_if_index) &&
+ (ia->address_length == address_length) &&
+ (x->as_u32 != address->as_u32))
+ continue;
+
+ /* error if the length or intf was different */
vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
return
if (vnet_sw_interface_is_admin_up (vnm, sw_if_index))
{
if (is_del)
- ip4_del_interface_routes (im, ip4_af.fib_index, address,
+ ip4_del_interface_routes (sw_if_index,
+ im, ip4_af.fib_index, address,
address_length);
else
ip4_add_interface_routes (sw_if_index,
im, fib_index,
ia);
else
- ip4_del_interface_routes (im, fib_index,
+ ip4_del_interface_routes (sw_if_index,
+ im, fib_index,
a, ia->address_length);
}));
/* *INDENT-ON* */
Code Review / vpp.git / blobdiff