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-rw-r--r--vnet/vnet/map/map.c49
1 files changed, 30 insertions, 19 deletions
diff --git a/vnet/vnet/map/map.c b/vnet/vnet/map/map.c
index 0108c7b0267..17ecf460f51 100644
--- a/vnet/vnet/map/map.c
+++ b/vnet/vnet/map/map.c
@@ -166,13 +166,9 @@ map_create_domain (ip4_address_t * ip4_prefix,
ip_adjacency_t adj;
ip4_add_del_route_args_t args4;
ip6_add_del_route_args_t args6;
- u8 suffix_len;
+ u8 suffix_len, suffix_shift;
uword *p;
- /* EA bits must be within the first 64 bits */
- if (ea_bits_len > 0 && (ip6_prefix_len + ea_bits_len) > 64)
- return -1;
-
/* Sanity check on the src prefix length */
if (flags & MAP_DOMAIN_TRANSLATION)
{
@@ -187,11 +183,34 @@ map_create_domain (ip4_address_t * ip4_prefix,
if (ip6_src_len != 128)
{
clib_warning
- ("MAP-E requires a BR address, not a prefix (ip6_src_len should be 128).");
+ ("MAP-E requires a BR address, not a prefix (ip6_src_len should "
+ "be 128).");
return -1;
}
}
+ /* How many, and which bits to grab from the IPv4 DA */
+ if (ip4_prefix_len + ea_bits_len < 32)
+ {
+ flags |= MAP_DOMAIN_PREFIX;
+ suffix_len = suffix_shift = 32 - ip4_prefix_len - ea_bits_len;
+ }
+ else
+ {
+ suffix_shift = 0;
+ suffix_len = 32 - ip4_prefix_len;
+ }
+
+ /* EA bits must be within the first 64 bits */
+ if (ea_bits_len > 0 && ((ip6_prefix_len + ea_bits_len) > 64 ||
+ ip6_prefix_len + suffix_len + psid_length > 64))
+ {
+ clib_warning
+ ("Embedded Address bits must be within the first 64 bits of "
+ "the IPv6 prefix");
+ return -1;
+ }
+
/* Get domain index */
pool_get_aligned (mm->domains, d, CLIB_CACHE_LINE_BYTES);
memset (d, 0, sizeof (*d));
@@ -209,18 +228,7 @@ map_create_domain (ip4_address_t * ip4_prefix,
d->psid_length = psid_length;
d->mtu = mtu;
d->flags = flags;
-
- /* How many, and which bits to grab from the IPv4 DA */
- if (ip4_prefix_len + ea_bits_len < 32)
- {
- d->flags |= MAP_DOMAIN_PREFIX;
- suffix_len = d->suffix_shift = 32 - ip4_prefix_len - ea_bits_len;
- }
- else
- {
- d->suffix_shift = 0;
- suffix_len = 32 - ip4_prefix_len;
- }
+ d->suffix_shift = suffix_shift;
d->suffix_mask = (1 << suffix_len) - 1;
d->psid_shift = 16 - psid_length - psid_offset;
@@ -274,7 +282,10 @@ map_create_domain (ip4_address_t * ip4_prefix,
p = (uword *) & adj6->rewrite_data[0];
p[0] = ~0;
- /* Add refcount, so we don't accidentially delete the route underneath someone */
+ /*
+ * Add refcount, so we don't accidentially delete the route
+ * underneath someone
+ */
p[1]++;
}
else