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authorEd Warnicke <eaw@cisco.com>2015-12-08 15:45:58 -0700
committerEd Warnicke <eaw@cisco.com>2015-12-08 15:47:27 -0700
commitcb9cadad578297ffd78fa8a33670bdf1ab669e7e (patch)
tree6ac2be912482cc7849a26f0ab845561c3d7f4e26 /build-root/emacs-lisp/tunnel-encap-skel.el
parentfb0815d4ae4bb0fe27bd9313f34b45c8593b907e (diff)
Initial commit of vpp code.v1.0.0
Change-Id: Ib246f1fbfce93274020ee93ce461e3d8bd8b9f17 Signed-off-by: Ed Warnicke <eaw@cisco.com>
Diffstat (limited to 'build-root/emacs-lisp/tunnel-encap-skel.el')
-rw-r--r--build-root/emacs-lisp/tunnel-encap-skel.el245
1 files changed, 245 insertions, 0 deletions
diff --git a/build-root/emacs-lisp/tunnel-encap-skel.el b/build-root/emacs-lisp/tunnel-encap-skel.el
new file mode 100644
index 00000000000..5933153e16c
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+++ b/build-root/emacs-lisp/tunnel-encap-skel.el
@@ -0,0 +1,245 @@
+;;; tunnel-encap-skel.el - tunnel interface output skeleton
+
+(require 'skeleton)
+
+(define-skeleton tunnel-encap-skel
+"Insert a tunnel encap implementation"
+nil
+'(setq encap_stack (skeleton-read "encap_stack (e.g ip4_udp_lisp): "))
+'(setq ENCAP_STACK (upcase encap_stack))
+'(setq encap-stack (replace-regexp-in-string "_" "-" encap_stack))
+'(setq ENCAP-STACK (upcase encap-stack))
+"
+#include <clib/error.h>
+#include <clib/hash.h>
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/" encap-stack "/" encap_stack ".h>
+
+/* Statistics (not really errors) */
+#define foreach_" encap_stack "_encap_error \\
+_(ENCAPSULATED, \"good packets encapsulated\")
+
+static char * " encap_stack "_encap_error_strings[] = {
+#define _(sym,string) string,
+ foreach_" encap_stack "_encap_error
+#undef _
+};
+
+typedef enum {
+#define _(sym,str) " ENCAP_STACK "_ENCAP_ERROR_##sym,
+ foreach_" encap_stack "_encap_error
+#undef _
+ " ENCAP_STACK "_ENCAP_N_ERROR,
+} " encap_stack "_encap_error_t;
+
+typedef enum {
+ " ENCAP_STACK "_ENCAP_NEXT_IP4_LOOKUP,
+ " ENCAP_STACK "_ENCAP_NEXT_DROP,
+ " ENCAP_STACK "_ENCAP_N_NEXT,
+} " encap_stack "_encap_next_t;
+
+typedef struct {
+ u32 tunnel_index;
+} " encap_stack "_encap_trace_t;
+
+u8 * format_" encap_stack "_encap_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ " encap_stack "_encap_trace_t * t
+ = va_arg (*args, " encap_stack "_encap_trace_t *);
+
+ s = format (s, \"" ENCAP-STACK ": tunnel %d\", t->tunnel_index);
+ return s;
+}
+
+/* $$$$ FIXME adjust to match the rewrite string */
+#define foreach_fixed_header_offset \\
+_(0) _(1) _(2) _(3) _(FIXME)
+
+static uword
+" encap_stack "_encap (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ u32 n_left_from, next_index, * from, * to_next;
+ " encap_stack "_main_t * ngm = &" encap_stack "_main;
+ vnet_main_t * vnm = ngm->vnet_main;
+ u32 pkts_encapsulated = 0;
+ u16 old_l0 = 0, old_l1 = 0;
+
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index,
+ to_next, n_left_to_next);
+
+#if 0 /* $$$ dual loop when the single loop works */
+ while (n_left_from >= 4 && n_left_to_next >= 2)
+ {
+ u32 bi0, bi1;
+ vlib_buffer_t * b0, * b1;
+ nsh_unicast_header_t * h0, * h1;
+ u32 label0, label1;
+ u32 next0, next1;
+ uword * p0, * p1;
+
+ /* Prefetch next iteration. */
+ {
+ vlib_buffer_t * p2, * p3;
+
+ p2 = vlib_get_buffer (vm, from[2]);
+ p3 = vlib_get_buffer (vm, from[3]);
+
+ vlib_prefetch_buffer_header (p2, LOAD);
+ vlib_prefetch_buffer_header (p3, LOAD);
+
+ CLIB_PREFETCH (p2->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (p3->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
+ }
+
+ bi0 = from[0];
+ bi1 = from[1];
+ to_next[0] = bi0;
+ to_next[1] = bi1;
+ from += 2;
+ to_next += 2;
+ n_left_to_next -= 2;
+ n_left_from -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ h0 = vlib_buffer_get_current (b0);
+ h1 = vlib_buffer_get_current (b1);
+
+ next0 = next1 = " ENCAP_STACK "_ENCAP_NEXT_IP4_LOOKUP;
+
+ vlib_buffer_advance (b0, sizeof (*h0));
+ vlib_buffer_advance (b1, sizeof (*h1));
+
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
+#endif
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t * b0;
+ u32 next0 = " ENCAP_STACK "_ENCAP_NEXT_IP4_LOOKUP;
+ vnet_hw_interface_t * hi0;
+ ip4_header_t * ip0;
+ udp_header_t * udp0;
+ u64 * copy_src0, * copy_dst0;
+ u32 * copy_src_last0, * copy_dst_last0;
+ " encap_stack "_tunnel_t * t0;
+ u16 new_l0;
+ ip_csum_t sum0;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ /* 1-wide cache? */
+ hi0 = vnet_get_sup_hw_interface
+ (vnm, vnet_buffer(b0)->sw_if_index[VLIB_TX]);
+
+ t0 = pool_elt_at_index (ngm->tunnels, hi0->dev_instance);
+
+ ASSERT(vec_len(t0->rewrite) >= 24);
+
+ /* Apply the rewrite string. $$$$ vnet_rewrite? */
+ vlib_buffer_advance (b0, -(word)_vec_len(t0->rewrite));
+
+ ip0 = vlib_buffer_get_current(b0);
+ /* Copy the fixed header */
+ copy_dst0 = (u64 *) ip0;
+ copy_src0 = (u64 *) t0->rewrite;
+
+ ASSERT (sizeof (ip4_udp_" encap_stack "_header_t) == FIXME);
+
+ /* Copy first N octets 8-bytes at a time */
+#define _(offs) copy_dst0[offs] = copy_src0[offs];
+ foreach_fixed_header_offset;
+#undef _
+#if 0 /* needed if encap not a multiple of 8 bytes */
+ /* Last 4 octets. Hopefully gcc will be our friend */
+ copy_dst_last0 = (u32 *)(&copy_dst0[FIXME]);
+ copy_src_last0 = (u32 *)(&copy_src0[FIXME]);
+ copy_dst_last0[0] = copy_src_last0[0];
+
+#endif
+ /* fix the <bleep>ing outer-IP checksum */
+ sum0 = ip0->checksum;
+ /* old_l0 always 0, see the rewrite setup */
+ new_l0 =
+ clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
+
+ sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
+ length /* changed member */);
+ ip0->checksum = ip_csum_fold (sum0);
+ ip0->length = new_l0;
+
+ /* Fix UDP length */
+ udp0 = (udp_header_t *)(ip0+1);
+ new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)
+ - sizeof (*ip0));
+
+ udp0->length = new_l0;
+
+ /* Reset to look up tunnel partner in the configured FIB */
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->encap_fib_index;
+ pkts_encapsulated ++;
+
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ " encap_stack "_encap_trace_t *tr =
+ vlib_add_trace (vm, node, b0, sizeof (*tr));
+ tr->tunnel_index = t0 - ngm->tunnels;
+ }
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+ vlib_node_increment_counter (vm, node->node_index,
+ " ENCAP_STACK "_ENCAP_ERROR_ENCAPSULATED,
+ pkts_encapsulated);
+ return from_frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (" encap_stack "_encap_node) = {
+ .function = " encap_stack "_encap,
+ .name = \"" encap-stack "-encap\",
+ .vector_size = sizeof (u32),
+ .format_trace = format_" encap_stack "_encap_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(" encap_stack "_encap_error_strings),
+ .error_strings = " encap_stack "_encap_error_strings,
+
+ .n_next_nodes = " ENCAP_STACK "_ENCAP_N_NEXT,
+
+ .next_nodes = {
+ [" ENCAP_STACK "_ENCAP_NEXT_IP4_LOOKUP] = \"ip4-lookup\",
+ [" ENCAP_STACK "_ENCAP_NEXT_DROP] = \"error-drop\",
+ },
+};
+")