fib: Source Address Selection
Type: feature
Use the FIB to provide SAS (in so far as it is today)
- Use the glean adjacency as the record of the connected prefixes
= there's a glean per-{interface, protocol, connected-prefix}
- Keep the glean up to date with whatever the recieve host prefix is
(since it can change)
Signed-off-by: Neale Ranns <neale.ranns@cisco.com>
Change-Id: I0f3dd1edb1f3fc965af1c7c586709028eb9cdeac
diff --git a/src/vnet/fib/fib_table.c b/src/vnet/fib/fib_table.c
index ec2acc5..e71e6c3 100644
--- a/src/vnet/fib/fib_table.c
+++ b/src/vnet/fib/fib_table.c
@@ -510,7 +510,7 @@
(~0 == path->frp_sw_if_index) &&
(0 == ip46_address_cmp(&path->frp_addr, &prefix->fp_addr)))
{
- /* Prefix recurses via itse;f */
+ /* Prefix recurses via itself */
path->frp_flags |= FIB_ROUTE_PATH_DROP;
}
if (!(path->frp_flags & FIB_ROUTE_PATH_LOCAL) &&
@@ -522,6 +522,15 @@
path->frp_addr = prefix->fp_addr;
path->frp_flags |= FIB_ROUTE_PATH_ATTACHED;
}
+ else if ((*eflags & FIB_ENTRY_FLAG_CONNECTED) &&
+ !(*eflags & FIB_ENTRY_FLAG_LOCAL))
+ {
+ if (ip46_address_is_zero(&path->frp_addr))
+ {
+ path->frp_flags |= FIB_ROUTE_PATH_GLEAN;
+ fib_prefix_normalize(prefix, &path->frp_connected);
+ }
+ }
if (*eflags & FIB_ENTRY_FLAG_DROP)
{
path->frp_flags |= FIB_ROUTE_PATH_DROP;