Reorganize source tree to use single autotools instance

Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 455 insertions, 0 deletions

diff --git a/src/vnet/gre/gre.c b/src/vnet/gre/gre.c
new file mode 100644
index 00000000000..0faed13eb29
--- /dev/null
+++ b/src/vnet/gre/gre.c
@@ -0,0 +1,455 @@
+/*
+ * gre.c: gre
+ *
+ * Copyright (c) 2012 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/vnet.h>
+#include <vnet/gre/gre.h>
+#include <vnet/adj/adj_midchain.h>
+
+gre_main_t gre_main;
+
+typedef struct {
+  union {
+    ip4_and_gre_header_t ip4_and_gre;
+    u64 as_u64[3];
+  };
+} ip4_and_gre_union_t;
+
+
+/* Packet trace structure */
+typedef struct {
+  /* Tunnel-id / index in tunnel vector */
+  u32 tunnel_id;
+
+  /* pkt length */
+  u32 length;
+
+  /* tunnel ip4 addresses */
+  ip4_address_t src;
+  ip4_address_t dst;
+} gre_tx_trace_t;
+
+u8 * format_gre_tx_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 *);
+  gre_tx_trace_t * t = va_arg (*args, gre_tx_trace_t *);
+
+  s = format (s, "GRE: tunnel %d len %d src %U dst %U",
+	      t->tunnel_id, clib_net_to_host_u16 (t->length),
+	      format_ip4_address, &t->src.as_u8,
+	      format_ip4_address, &t->dst.as_u8);
+  return s;
+}
+
+u8 * format_gre_protocol (u8 * s, va_list * args)
+{
+  gre_protocol_t p = va_arg (*args, u32);
+  gre_main_t * gm = &gre_main;
+  gre_protocol_info_t * pi = gre_get_protocol_info (gm, p);
+
+  if (pi)
+    s = format (s, "%s", pi->name);
+  else
+    s = format (s, "0x%04x", p);
+
+  return s;
+}
+
+u8 * format_gre_header_with_length (u8 * s, va_list * args)
+{
+  gre_main_t * gm = &gre_main;
+  gre_header_t * h = va_arg (*args, gre_header_t *);
+  u32 max_header_bytes = va_arg (*args, u32);
+  gre_protocol_t p = clib_net_to_host_u16 (h->protocol);
+  uword indent, header_bytes;
+
+  header_bytes = sizeof (h[0]);
+  if (max_header_bytes != 0 && header_bytes > max_header_bytes)
+    return format (s, "gre header truncated");
+
+  indent = format_get_indent (s);
+
+  s = format (s, "GRE %U", format_gre_protocol, p);
+
+  if (max_header_bytes != 0 && header_bytes > max_header_bytes)
+    {
+      gre_protocol_info_t * pi = gre_get_protocol_info (gm, p);
+      vlib_node_t * node = vlib_get_node (gm->vlib_main, pi->node_index);
+      if (node->format_buffer)
+	s = format (s, "\n%U%U",
+		    format_white_space, indent,
+		    node->format_buffer, (void *) (h + 1),
+		    max_header_bytes - header_bytes);
+    }
+
+  return s;
+}
+
+u8 * format_gre_header (u8 * s, va_list * args)
+{
+  gre_header_t * h = va_arg (*args, gre_header_t *);
+  return format (s, "%U", format_gre_header_with_length, h, 0);
+}
+
+/* Returns gre protocol as an int in host byte order. */
+uword
+unformat_gre_protocol_host_byte_order (unformat_input_t * input,
+				       va_list * args)
+{
+  u16 * result = va_arg (*args, u16 *);
+  gre_main_t * gm = &gre_main;
+  int i;
+
+  /* Named type. */
+  if (unformat_user (input, unformat_vlib_number_by_name,
+		     gm->protocol_info_by_name, &i))
+    {
+      gre_protocol_info_t * pi = vec_elt_at_index (gm->protocol_infos, i);
+      *result = pi->protocol;
+      return 1;
+    }
+
+  return 0;
+}
+
+uword
+unformat_gre_protocol_net_byte_order (unformat_input_t * input,
+				      va_list * args)
+{
+  u16 * result = va_arg (*args, u16 *);
+  if (! unformat_user (input, unformat_gre_protocol_host_byte_order, result))
+    return 0;
+  *result = clib_host_to_net_u16 ((u16) *result);
+  return 1;
+}
+
+uword
+unformat_gre_header (unformat_input_t * input, va_list * args)
+{
+  u8 ** result = va_arg (*args, u8 **);
+  gre_header_t _h, * h = &_h;
+  u16 p;
+
+  if (! unformat (input, "%U",
+		  unformat_gre_protocol_host_byte_order, &p))
+    return 0;
+
+  h->protocol = clib_host_to_net_u16 (p);
+
+  /* Add header to result. */
+  {
+    void * p;
+    u32 n_bytes = sizeof (h[0]);
+
+    vec_add2 (*result, p, n_bytes);
+    clib_memcpy (p, h, n_bytes);
+  }
+
+  return 1;
+}
+
+static int
+gre_proto_from_vnet_link (vnet_link_t link)
+{
+    switch (link)
+    {
+    case VNET_LINK_IP4:
+        return (GRE_PROTOCOL_ip4);
+    case VNET_LINK_IP6:
+        return (GRE_PROTOCOL_ip6);
+    case VNET_LINK_MPLS:
+        return (GRE_PROTOCOL_mpls_unicast);
+    case VNET_LINK_ETHERNET:
+        return (GRE_PROTOCOL_teb);
+    case VNET_LINK_ARP:
+        return (GRE_PROTOCOL_arp);
+    }
+    ASSERT(0);
+    return (GRE_PROTOCOL_ip4);
+}
+
+static u8*
+gre_build_rewrite (vnet_main_t * vnm,
+		   u32 sw_if_index,
+		   vnet_link_t link_type,
+		   const void *dst_address)
+{
+  gre_main_t * gm = &gre_main;
+  ip4_and_gre_header_t * h;
+  u8* rewrite = NULL;
+  gre_tunnel_t *t;
+  u32 ti;
+
+  ti = gm->tunnel_index_by_sw_if_index[sw_if_index];
+
+  if (~0 == ti)
+      /* not one of ours */
+      return (0);
+
+  t = pool_elt_at_index(gm->tunnels, ti);
+
+  vec_validate(rewrite, sizeof(*h)-1);
+  h = (ip4_and_gre_header_t*)rewrite;
+  h->gre.protocol = clib_host_to_net_u16(gre_proto_from_vnet_link(link_type));
+
+  h->ip4.ip_version_and_header_length = 0x45;
+  h->ip4.ttl = 254;
+  h->ip4.protocol = IP_PROTOCOL_GRE;
+  /* fixup ip4 header length and checksum after-the-fact */
+  h->ip4.src_address.as_u32 = t->tunnel_src.as_u32;
+  h->ip4.dst_address.as_u32 = t->tunnel_dst.as_u32;
+  h->ip4.checksum = ip4_header_checksum (&h->ip4);
+
+  return (rewrite);
+}
+
+void
+gre_fixup (vlib_main_t *vm,
+	   ip_adjacency_t *adj,
+	   vlib_buffer_t *b0)
+{
+    ip4_header_t * ip0;
+
+    ip0 = vlib_buffer_get_current (b0);
+
+    /* Fixup the checksum and len fields in the GRE tunnel encap
+     * that was applied at the midchain node */
+    ip0->length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
+    ip0->checksum = ip4_header_checksum (ip0);
+}
+
+void
+gre_update_adj (vnet_main_t * vnm,
+		u32 sw_if_index,
+		adj_index_t ai)
+{
+    adj_nbr_midchain_update_rewrite (ai, gre_fixup, 
+				     ADJ_MIDCHAIN_FLAG_NONE,
+				     gre_build_rewrite(vnm, sw_if_index,
+						       adj_get_link_type(ai),
+						       NULL));
+
+    gre_tunnel_stack(ai);
+}
+
+/**
+ * @brief TX function. Only called L2. L3 traffic uses the adj-midchains
+ */
+static uword
+gre_interface_tx_inline (vlib_main_t * vm,
+                         vlib_node_runtime_t * node,
+                         vlib_frame_t * frame)
+{
+  gre_main_t * gm = &gre_main;
+  u32 next_index;
+  u32 * from, * to_next, n_left_from, n_left_to_next;
+  vnet_interface_output_runtime_t * rd = (void *) node->runtime_data;
+  const gre_tunnel_t *gt = pool_elt_at_index (gm->tunnels, rd->dev_instance);
+
+  /* Vector of buffer / pkt indices we're supposed to process */
+  from = vlib_frame_vector_args (frame);
+
+  /* Number of buffers / pkts */
+  n_left_from = frame->n_vectors;
+
+  /* Speculatively send the first buffer to the last disposition we used */
+  next_index = node->cached_next_index;
+
+  while (n_left_from > 0)
+    {
+      /* set up to enqueue to our disposition with index = next_index */
+      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+      /*
+       * FIXME DUAL LOOP
+       */
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  vlib_buffer_t * b0;
+	  u32 bi0;
+
+	  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);
+
+	  vnet_buffer(b0)->ip.adj_index[VLIB_TX] = gt->l2_adj_index;
+
+	  if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+	    {
+	      gre_tx_trace_t *tr = vlib_add_trace (vm, node,
+						   b0, sizeof (*tr));
+	      tr->tunnel_id = gt - gm->tunnels;
+	      tr->length = vlib_buffer_length_in_chain (vm, b0);
+	      tr->src.as_u32 = gt->tunnel_src.as_u32;
+	      tr->dst.as_u32 = gt->tunnel_src.as_u32;
+	    }
+
+	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+					   to_next, n_left_to_next,
+					   bi0, gt->l2_tx_arc);
+	}
+
+      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+    }
+
+  vlib_node_increment_counter (vm, gre_input_node.index,
+			       GRE_ERROR_PKTS_ENCAP, frame->n_vectors);
+
+  return frame->n_vectors;
+}
+
+static uword
+gre_interface_tx (vlib_main_t * vm,
+                  vlib_node_runtime_t * node,
+                  vlib_frame_t * frame)
+{
+    return (gre_interface_tx_inline (vm, node, frame));
+}
+
+static uword
+gre_teb_interface_tx (vlib_main_t * vm,
+                      vlib_node_runtime_t * node,
+                      vlib_frame_t * frame)
+{
+    return (gre_interface_tx_inline (vm, node, frame));
+}
+
+static u8 * format_gre_tunnel_name (u8 * s, va_list * args)
+{
+  u32 dev_instance = va_arg (*args, u32);
+  return format (s, "gre%d", dev_instance);
+}
+
+static u8 * format_gre_tunnel_teb_name (u8 * s, va_list * args)
+{
+  u32 dev_instance = va_arg (*args, u32);
+  return format (s, "teb-gre%d", dev_instance);
+}
+
+static u8 * format_gre_device (u8 * s, va_list * args)
+{
+  u32 dev_instance = va_arg (*args, u32);
+  CLIB_UNUSED (int verbose) = va_arg (*args, int);
+
+  s = format (s, "GRE tunnel: id %d\n", dev_instance);
+  return s;
+}
+
+VNET_DEVICE_CLASS (gre_device_class) = {
+  .name = "GRE tunnel device",
+  .format_device_name = format_gre_tunnel_name,
+  .format_device = format_gre_device,
+  .format_tx_trace = format_gre_tx_trace,
+  .tx_function = gre_interface_tx,
+  .admin_up_down_function = gre_interface_admin_up_down,
+#ifdef SOON
+  .clear counter = 0;
+#endif
+};
+
+VLIB_DEVICE_TX_FUNCTION_MULTIARCH (gre_device_class,
+				   gre_interface_tx)
+
+VNET_DEVICE_CLASS (gre_device_teb_class) = {
+  .name = "GRE TEB tunnel device",
+  .format_device_name = format_gre_tunnel_teb_name,
+  .format_device = format_gre_device,
+  .format_tx_trace = format_gre_tx_trace,
+  .tx_function = gre_teb_interface_tx,
+  .admin_up_down_function = gre_interface_admin_up_down,
+#ifdef SOON
+  .clear counter = 0;
+#endif
+};
+
+VLIB_DEVICE_TX_FUNCTION_MULTIARCH (gre_device_teb_class,
+				   gre_teb_interface_tx)
+
+VNET_HW_INTERFACE_CLASS (gre_hw_interface_class) = {
+  .name = "GRE",
+  .format_header = format_gre_header_with_length,
+  .unformat_header = unformat_gre_header,
+  .build_rewrite = gre_build_rewrite,
+  .update_adjacency = gre_update_adj,
+  .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
+};
+
+static void add_protocol (gre_main_t * gm,
+			  gre_protocol_t protocol,
+			  char * protocol_name)
+{
+  gre_protocol_info_t * pi;
+  u32 i;
+
+  vec_add2 (gm->protocol_infos, pi, 1);
+  i = pi - gm->protocol_infos;
+
+  pi->name = protocol_name;
+  pi->protocol = protocol;
+  pi->next_index = pi->node_index = ~0;
+
+  hash_set (gm->protocol_info_by_protocol, protocol, i);
+  hash_set_mem (gm->protocol_info_by_name, pi->name, i);
+}
+
+static clib_error_t * gre_init (vlib_main_t * vm)
+{
+  gre_main_t * gm = &gre_main;
+  clib_error_t * error;
+  ip_main_t * im = &ip_main;
+  ip_protocol_info_t * pi;
+
+  memset (gm, 0, sizeof (gm[0]));
+  gm->vlib_main = vm;
+  gm->vnet_main = vnet_get_main();
+
+  if ((error = vlib_call_init_function (vm, ip_main_init)))
+    return error;
+
+  if ((error = vlib_call_init_function (vm, ip4_lookup_init)))
+    return error;
+
+  /* Set up the ip packet generator */
+  pi = ip_get_protocol_info (im, IP_PROTOCOL_GRE);
+  pi->format_header = format_gre_header;
+  pi->unformat_pg_edit = unformat_pg_gre_header;
+
+  gm->protocol_info_by_name = hash_create_string (0, sizeof (uword));
+  gm->protocol_info_by_protocol = hash_create (0, sizeof (uword));
+  gm->tunnel_by_key = hash_create (0, sizeof (uword));
+
+#define _(n,s) add_protocol (gm, GRE_PROTOCOL_##s, #s);
+  foreach_gre_protocol
+#undef _
+
+  return vlib_call_init_function (vm, gre_input_init);
+}
+
+VLIB_INIT_FUNCTION (gre_init);
+
+gre_main_t * gre_get_main (vlib_main_t * vm)
+{
+  vlib_call_init_function (vm, gre_init);
+  return &gre_main;
+}
+