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-rw-r--r--vnet/vnet/sr/sr.c124
-rw-r--r--vnet/vnet/sr/sr_packet.h6
2 files changed, 70 insertions, 60 deletions
diff --git a/vnet/vnet/sr/sr.c b/vnet/vnet/sr/sr.c
index c4140f8f64e..e7992ad92ae 100644
--- a/vnet/vnet/sr/sr.c
+++ b/vnet/vnet/sr/sr.c
@@ -306,8 +306,6 @@ sr_rewrite (vlib_main_t * vm,
ip_adjacency_t * adj0, * adj1;
ip6_sr_header_t * sr0, * sr1;
ip6_sr_tunnel_t * t0, *t1;
- u64 * copy_src0, * copy_dst0;
- u64 * copy_src1, * copy_dst1;
u32 next0 = SR_REWRITE_NEXT_IP6_LOOKUP;
u32 next1 = SR_REWRITE_NEXT_IP6_LOOKUP;
u16 new_l0 = 0;
@@ -364,7 +362,7 @@ sr_rewrite (vlib_main_t * vm,
* service has the original dst address, and will already
* have an SR header. If so, send it to sr-local
*/
- if (PREDICT_FALSE(ip0->protocol == 43))
+ if (PREDICT_FALSE(ip0->protocol == IPPROTO_IPV6_ROUTE))
{
vlib_buffer_advance (b0, sizeof(ip0));
sr0 = (ip6_sr_header_t *) (ip0+1);
@@ -373,33 +371,32 @@ sr_rewrite (vlib_main_t * vm,
}
else
{
- copy_dst0 = (u64 *)(((u8 *)ip0) - vec_len (t0->rewrite));
- copy_src0 = (u64 *) ip0;
-
/*
* Copy data before the punch-in point left by the
* required amount. Assume (for the moment) that only
* the main packet header needs to be copied.
*/
- copy_dst0 [0] = copy_src0 [0];
- copy_dst0 [1] = copy_src0 [1];
- copy_dst0 [2] = copy_src0 [2];
- copy_dst0 [3] = copy_src0 [3];
- copy_dst0 [4] = copy_src0 [4];
+ clib_memcpy (((u8 *)ip0) - vec_len (t0->rewrite),
+ ip0, sizeof (ip6_header_t));
vlib_buffer_advance (b0, - (word) vec_len(t0->rewrite));
ip0 = vlib_buffer_get_current (b0);
sr0 = (ip6_sr_header_t *) (ip0+1);
/* $$$ tune */
clib_memcpy (sr0, t0->rewrite, vec_len (t0->rewrite));
+
/* Fix the next header chain */
sr0->protocol = ip0->protocol;
- ip0->protocol = 43; /* routing extension header */
+ ip0->protocol = IPPROTO_IPV6_ROUTE; /* routing extension header */
new_l0 = clib_net_to_host_u16(ip0->payload_length) +
vec_len (t0->rewrite);
ip0->payload_length = clib_host_to_net_u16(new_l0);
- /* Rewrite the ip6 dst address */
- ip0->dst_address.as_u64[0] = t0->first_hop.as_u64[0];
- ip0->dst_address.as_u64[1] = t0->first_hop.as_u64[1];
+
+ /* Copy dst address into the DA slot in the segment list */
+ clib_memcpy (sr0->segments, ip0->dst_address.as_u64,
+ sizeof (ip6_address_t));
+ /* Rewrite the ip6 dst address with the first hop */
+ clib_memcpy (ip0->dst_address.as_u64, t0->first_hop.as_u64,
+ sizeof (ip6_address_t));
sr_fix_hmac (sm, ip0, sr0);
@@ -418,7 +415,7 @@ sr_rewrite (vlib_main_t * vm,
}
}
- if (PREDICT_FALSE(ip1->protocol == 43))
+ if (PREDICT_FALSE(ip1->protocol == IPPROTO_IPV6_ROUTE))
{
vlib_buffer_advance (b1, sizeof(ip1));
sr1 = (ip6_sr_header_t *) (ip1+1);
@@ -427,25 +424,25 @@ sr_rewrite (vlib_main_t * vm,
}
else
{
- copy_dst1 = (u64 *)(((u8 *)ip1) - vec_len (t1->rewrite));
- copy_src1 = (u64 *) ip1;
-
- copy_dst1 [0] = copy_src1 [0];
- copy_dst1 [1] = copy_src1 [1];
- copy_dst1 [2] = copy_src1 [2];
- copy_dst1 [3] = copy_src1 [3];
- copy_dst1 [4] = copy_src1 [4];
+ clib_memcpy (((u8 *)ip0) - vec_len (t0->rewrite),
+ ip0, sizeof (ip6_header_t));
vlib_buffer_advance (b1, - (word) vec_len(t1->rewrite));
ip1 = vlib_buffer_get_current (b1);
sr1 = (ip6_sr_header_t *) (ip1+1);
clib_memcpy (sr1, t1->rewrite, vec_len (t1->rewrite));
+
sr1->protocol = ip1->protocol;
- ip1->protocol = 43;
+ ip1->protocol = IPPROTO_IPV6_ROUTE;
new_l1 = clib_net_to_host_u16(ip1->payload_length) +
vec_len (t1->rewrite);
ip1->payload_length = clib_host_to_net_u16(new_l1);
- ip1->dst_address.as_u64[0] = t1->first_hop.as_u64[0];
- ip1->dst_address.as_u64[1] = t1->first_hop.as_u64[1];
+
+ /* Copy dst address into the DA slot in the segment list */
+ clib_memcpy (sr1->segments, ip1->dst_address.as_u64,
+ sizeof (ip6_address_t));
+ /* Rewrite the ip6 dst address with the first hop */
+ clib_memcpy (ip1->dst_address.as_u64, t1->first_hop.as_u64,
+ sizeof (ip6_address_t));
sr_fix_hmac (sm, ip1, sr1);
@@ -504,7 +501,6 @@ sr_rewrite (vlib_main_t * vm,
ip_adjacency_t * adj0;
ip6_sr_header_t * sr0 = 0;
ip6_sr_tunnel_t * t0;
- u64 * copy_src0, * copy_dst0;
u32 next0 = SR_REWRITE_NEXT_IP6_LOOKUP;
u16 new_l0 = 0;
@@ -548,7 +544,7 @@ sr_rewrite (vlib_main_t * vm,
* service has the original dst address, and will already
* have an SR header. If so, send it to sr-local
*/
- if (PREDICT_FALSE(ip0->protocol == 43))
+ if (PREDICT_FALSE(ip0->protocol == IPPROTO_IPV6_ROUTE))
{
vlib_buffer_advance (b0, sizeof(ip0));
sr0 = (ip6_sr_header_t *) (ip0+1);
@@ -557,33 +553,32 @@ sr_rewrite (vlib_main_t * vm,
}
else
{
- copy_dst0 = (u64 *)(((u8 *)ip0) - vec_len (t0->rewrite));
- copy_src0 = (u64 *) ip0;
-
/*
* Copy data before the punch-in point left by the
* required amount. Assume (for the moment) that only
* the main packet header needs to be copied.
*/
- copy_dst0 [0] = copy_src0 [0];
- copy_dst0 [1] = copy_src0 [1];
- copy_dst0 [2] = copy_src0 [2];
- copy_dst0 [3] = copy_src0 [3];
- copy_dst0 [4] = copy_src0 [4];
+ clib_memcpy (((u8 *)ip0) - vec_len (t0->rewrite),
+ ip0, sizeof (ip6_header_t));
vlib_buffer_advance (b0, - (word) vec_len(t0->rewrite));
ip0 = vlib_buffer_get_current (b0);
sr0 = (ip6_sr_header_t *) (ip0+1);
/* $$$ tune */
clib_memcpy (sr0, t0->rewrite, vec_len (t0->rewrite));
+
/* Fix the next header chain */
sr0->protocol = ip0->protocol;
- ip0->protocol = 43; /* routing extension header */
+ ip0->protocol = IPPROTO_IPV6_ROUTE; /* routing extension header */
new_l0 = clib_net_to_host_u16(ip0->payload_length) +
vec_len (t0->rewrite);
ip0->payload_length = clib_host_to_net_u16(new_l0);
- /* Rewrite the ip6 dst address */
- ip0->dst_address.as_u64[0] = t0->first_hop.as_u64[0];
- ip0->dst_address.as_u64[1] = t0->first_hop.as_u64[1];
+
+ /* Copy dst address into the DA slot in the segment list */
+ clib_memcpy (sr0->segments, ip0->dst_address.as_u64,
+ sizeof (ip6_address_t));
+ /* Rewrite the ip6 dst address with the first hop */
+ clib_memcpy (ip0->dst_address.as_u64, t0->first_hop.as_u64,
+ sizeof (ip6_address_t));
sr_fix_hmac (sm, ip0, sr0);
@@ -886,24 +881,20 @@ int ip6_sr_add_del_tunnel (ip6_sr_add_del_tunnel_args_t * a)
t->rx_fib_index = rx_fib_index;
t->tx_fib_index = tx_fib_index;
- /* The first specified hop goes right into the dst address */
- if (vec_len(a->segments))
- {
- t->first_hop = a->segments[0];
- /* It won't feel nice if we do it twice */
- vec_delete (a->segments, 1, 0);
- }
- else /* there must be at least one segment... */
+ if (!vec_len (a->segments))
+ /* there must be at least one segment... */
return -4;
+ /* The first specified hop goes right into the dst address */
+ clib_memcpy(&t->first_hop, &a->segments[0], sizeof (ip6_address_t));
+
/*
* Create the sr header rewrite string
- * We append the dst address to the set of next hops
- * so the ultimate recipient can tell where the
- * packet entered the SR domain
+ * The list of segments needs an extra slot for the ultimate destination
+ * which is taken from the packet we add the SRH to.
*/
header_length = sizeof (*h) +
- sizeof (ip6_address_t) * (vec_len (a->segments) + vec_len (a->tags));
+ sizeof (ip6_address_t) * (vec_len (a->segments) + 1 + vec_len (a->tags));
if (a->shared_secret)
{
@@ -927,15 +918,24 @@ int ip6_sr_add_del_tunnel (ip6_sr_add_del_tunnel_args_t * a)
h->length = (header_length/8) - 1;
h->type = ROUTING_HEADER_TYPE_SR;
- h->segments_left = vec_len (a->segments);
- h->first_segment = vec_len(a->segments) -1;
+
+ /* first_segment and segments_left need to have the index of the last
+ * element in the list; a->segments has one element less than ends up
+ * in the header (it does not have the DA in it), so vec_len(a->segments)
+ * is the value we want.
+ */
+ h->first_segment = h->segments_left = vec_len (a->segments);
+
if (a->shared_secret)
h->hmac_key = hmac_key_index & 0xFF;
h->flags = a->flags_net_byte_order;
- /* Paint on the segment list, in reverse */
- addrp = h->segments + (vec_len (a->segments) - 1);
+ /* Paint on the segment list, in reverse.
+ * This is offset by one to leave room at the start for the ultimate
+ * destination.
+ */
+ addrp = h->segments + vec_len (a->segments);
vec_foreach (this_address, a->segments)
{
@@ -943,6 +943,12 @@ int ip6_sr_add_del_tunnel (ip6_sr_add_del_tunnel_args_t * a)
addrp--;
}
+ /*
+ * Since the ultimate destination address is not yet known, set that slot
+ * to a value we will instantly recognize as bogus.
+ */
+ memset (h->segments, 0xfe, sizeof (ip6_address_t));
+
/* Paint on the tag list, not reversed */
addrp = h->segments + vec_len(a->segments);
@@ -1857,7 +1863,7 @@ sr_fix_dst_addr (vlib_main_t * vm,
sr0 = (ip6_sr_header_t *) (ip0+1);
/* We'd better find an SR header... */
- if (PREDICT_FALSE(ip0->protocol != 43))
+ if (PREDICT_FALSE(ip0->protocol != IPPROTO_IPV6_ROUTE))
{
b0->error = node->errors[SR_FIX_DST_ERROR_NO_SR_HEADER];
goto do_trace0;
@@ -1976,7 +1982,7 @@ static clib_error_t * sr_init (vlib_main_t * vm)
sm->hmac_key_by_shared_secret = hash_create_string (0, sizeof(uword));
- ip6_register_protocol (43, sr_local_node.index);
+ ip6_register_protocol (IPPROTO_IPV6_ROUTE, sr_local_node.index);
ip6_lookup_node = vlib_get_node_by_name (vm, (u8 *)"ip6-lookup");
ASSERT(ip6_lookup_node);
diff --git a/vnet/vnet/sr/sr_packet.h b/vnet/vnet/sr/sr_packet.h
index 5604a8dadb7..f9672e8025b 100644
--- a/vnet/vnet/sr/sr_packet.h
+++ b/vnet/vnet/sr/sr_packet.h
@@ -163,7 +163,11 @@
* Policy List Flags MUST be set to 0x0.
*/
-#define ROUTING_HEADER_TYPE_SR 4
+#ifndef IPPROTO_IPV6_ROUTE
+#define IPPROTO_IPV6_ROUTE 43
+#endif
+
+#define ROUTING_HEADER_TYPE_SR 4
typedef struct {
/* Protocol for next header. */