ioam: ip6 hop by hop ext header and SR header co-existence
1. Fix finding sr extension header
2. Fix for assert checks for space for sr header in packet headroom
3. ioam build warnings
4. Fix for SR header removal in presence of hbh ext header
clib_memcpy with overlapping src/dst was failing
Change-Id: I8576204eb571d1d4725a4e6976e18fe61cd1cd35
Signed-off-by: shwethab <shwetha.bhandari@gmail.com>
diff --git a/src/vnet/ip/ip6_packet.h b/src/vnet/ip/ip6_packet.h
index 9bf19ed..bb7d703 100644
--- a/src/vnet/ip/ip6_packet.h
+++ b/src/vnet/ip/ip6_packet.h
@@ -484,7 +484,7 @@
{ \
(p) = ip6_ext_next_header((p)); \
} \
- if ( ip6_ext_hdr((p)->next_hdr) == (t)) \
+ if ( ((p)->next_hdr) == (t)) \
{ \
(m) = (void *)(ip6_ext_next_header((p))); \
} \
diff --git a/src/vnet/sr/sr.h b/src/vnet/sr/sr.h
index 1545a84..5efeb4d 100755
--- a/src/vnet/sr/sr.h
+++ b/src/vnet/sr/sr.h
@@ -297,7 +297,7 @@
* @return precomputed rewrite string for SRH insertion
*/
static inline u8 *
-ip6_compute_rewrite_string_insert (ip6_address_t * sl)
+ip6_sr_compute_rewrite_string_insert (ip6_address_t * sl)
{
ip6_sr_header_t *srh;
ip6_address_t *addrp, *this_address;
diff --git a/src/vnet/sr/sr_localsid.c b/src/vnet/sr/sr_localsid.c
index 407491c..610bb7f 100755
--- a/src/vnet/sr/sr_localsid.c
+++ b/src/vnet/sr/sr_localsid.c
@@ -827,6 +827,9 @@
ip6_sr_localsid_t * ls0, u32 * next0)
{
u32 new_l0, sr_len;
+ u64 *copy_dst0, *copy_src0;
+ u32 copy_len_u64s0 = 0;
+ int i;
if (PREDICT_TRUE (sr0->type == ROUTING_HEADER_TYPE_SR))
{
@@ -845,8 +848,25 @@
vlib_buffer_advance (b0, sr_len);
new_l0 = clib_net_to_host_u16 (ip0->payload_length) - sr_len;
ip0->payload_length = clib_host_to_net_u16 (new_l0);
- clib_memcpy ((void *) ip0 + sr_len, ip0,
- (void *) sr0 - (void *) ip0);
+ copy_src0 = (u64 *) ip0;
+ copy_dst0 = copy_src0 + (sr0->length + 1);
+ /* number of 8 octet units to copy
+ * By default in absence of extension headers it is equal to length of ip6 header
+ * With extension headers it number of 8 octet units of ext headers preceding
+ * SR header
+ */
+ copy_len_u64s0 =
+ (((u8 *) sr0 - (u8 *) ip0) - sizeof (ip6_header_t)) >> 3;
+ copy_dst0[4 + copy_len_u64s0] = copy_src0[4 + copy_len_u64s0];
+ copy_dst0[3 + copy_len_u64s0] = copy_src0[3 + copy_len_u64s0];
+ copy_dst0[2 + copy_len_u64s0] = copy_src0[2 + copy_len_u64s0];
+ copy_dst0[1 + copy_len_u64s0] = copy_src0[1 + copy_len_u64s0];
+ copy_dst0[0 + copy_len_u64s0] = copy_src0[0 + copy_len_u64s0];
+
+ for (i = copy_len_u64s0 - 1; i >= 0; i--)
+ {
+ copy_dst0[i] = copy_src0[i];
+ }
if (ls0->behavior == SR_BEHAVIOR_X)
{
diff --git a/src/vnet/sr/sr_policy_rewrite.c b/src/vnet/sr/sr_policy_rewrite.c
index 1f8bdca..dfdd795 100755
--- a/src/vnet/sr/sr_policy_rewrite.c
+++ b/src/vnet/sr/sr_policy_rewrite.c
@@ -1147,14 +1147,14 @@
pool_elt_at_index (sm->sid_lists,
vnet_buffer (b3)->ip.adj_index[VLIB_TX]);
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl0->rewrite) + b0->current_data));
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl1->rewrite) + b1->current_data));
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl2->rewrite) + b2->current_data));
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl3->rewrite) + b3->current_data));
+ ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl0->rewrite));
+ ASSERT (b1->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl1->rewrite));
+ ASSERT (b2->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl2->rewrite));
+ ASSERT (b3->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl3->rewrite));
ip0_encap = vlib_buffer_get_current (b0);
ip1_encap = vlib_buffer_get_current (b1);
@@ -1254,9 +1254,8 @@
sl0 =
pool_elt_at_index (sm->sid_lists,
vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
-
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl0->rewrite) + b0->current_data));
+ ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl0->rewrite));
ip0_encap = vlib_buffer_get_current (b0);
@@ -1426,15 +1425,14 @@
sl3 =
pool_elt_at_index (sm->sid_lists,
vnet_buffer (b3)->ip.adj_index[VLIB_TX]);
-
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl0->rewrite) + b0->current_data));
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl1->rewrite) + b1->current_data));
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl2->rewrite) + b2->current_data));
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl3->rewrite) + b3->current_data));
+ ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl0->rewrite));
+ ASSERT (b1->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl1->rewrite));
+ ASSERT (b2->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl2->rewrite));
+ ASSERT (b3->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl3->rewrite));
ip0_encap = vlib_buffer_get_current (b0);
ip1_encap = vlib_buffer_get_current (b1);
@@ -1535,9 +1533,8 @@
sl0 =
pool_elt_at_index (sm->sid_lists,
vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
-
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl0->rewrite) + b0->current_data));
+ ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl0->rewrite));
ip0_encap = vlib_buffer_get_current (b0);
@@ -1785,14 +1782,14 @@
pool_elt_at_index (sm->sid_lists,
vnet_buffer (b3)->ip.adj_index[VLIB_TX]);
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl0->rewrite) + b0->current_data));
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl1->rewrite) + b1->current_data));
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl2->rewrite) + b2->current_data));
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl3->rewrite) + b3->current_data));
+ ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl0->rewrite));
+ ASSERT (b1->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl1->rewrite));
+ ASSERT (b2->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl2->rewrite));
+ ASSERT (b3->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl3->rewrite));
en0 = vlib_buffer_get_current (b0);
en1 = vlib_buffer_get_current (b1);
@@ -1926,9 +1923,8 @@
sl0 =
pool_elt_at_index (sm->sid_lists,
vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
-
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl0->rewrite) + b0->current_data));
+ ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl0->rewrite));
en0 = vlib_buffer_get_current (b0);
@@ -2075,15 +2071,14 @@
sl3 =
pool_elt_at_index (sm->sid_lists,
vnet_buffer (b3)->ip.adj_index[VLIB_TX]);
-
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl0->rewrite) + b0->current_data));
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl1->rewrite) + b1->current_data));
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl2->rewrite) + b2->current_data));
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl3->rewrite) + b3->current_data));
+ ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl0->rewrite));
+ ASSERT (b1->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl1->rewrite));
+ ASSERT (b2->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl2->rewrite));
+ ASSERT (b3->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl3->rewrite));
ip0 = vlib_buffer_get_current (b0);
ip1 = vlib_buffer_get_current (b1);
@@ -2321,8 +2316,8 @@
sl0 =
pool_elt_at_index (sm->sid_lists,
vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl0->rewrite) + b0->current_data));
+ ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl0->rewrite));
ip0 = vlib_buffer_get_current (b0);
@@ -2498,15 +2493,14 @@
sl3 =
pool_elt_at_index (sm->sid_lists,
vnet_buffer (b3)->ip.adj_index[VLIB_TX]);
-
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl0->rewrite_bsid) + b0->current_data));
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl1->rewrite_bsid) + b1->current_data));
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl2->rewrite_bsid) + b2->current_data));
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl3->rewrite_bsid) + b3->current_data));
+ ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl0->rewrite_bsid));
+ ASSERT (b1->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl1->rewrite_bsid));
+ ASSERT (b2->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl2->rewrite_bsid));
+ ASSERT (b3->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl3->rewrite_bsid));
ip0 = vlib_buffer_get_current (b0);
ip1 = vlib_buffer_get_current (b1);
@@ -2735,8 +2729,8 @@
sl0 =
pool_elt_at_index (sm->sid_lists,
vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl0->rewrite_bsid) + b0->current_data));
+ ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl0->rewrite_bsid));
ip0 = vlib_buffer_get_current (b0);
@@ -2943,15 +2937,14 @@
sl3 =
pool_elt_at_index (sm->sid_lists,
vnet_buffer (b3)->ip.adj_index[VLIB_TX]);
-
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl0->rewrite) + b0->current_data));
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl1->rewrite) + b1->current_data));
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl2->rewrite) + b2->current_data));
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl3->rewrite) + b3->current_data));
+ ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl0->rewrite));
+ ASSERT (b1->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl1->rewrite));
+ ASSERT (b2->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl2->rewrite));
+ ASSERT (b3->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl3->rewrite));
ip0_encap = vlib_buffer_get_current (b0);
ip1_encap = vlib_buffer_get_current (b1);
@@ -3067,9 +3060,8 @@
sl0 =
pool_elt_at_index (sm->sid_lists,
vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
-
- ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >=
- (vec_len (sl0->rewrite) + b0->current_data));
+ ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >=
+ vec_len (sl0->rewrite));
ip0_encap = vlib_buffer_get_current (b0);
ip6_ext_header_find_t (ip0_encap, prev0, sr0,