ip: add container proxy dump API (VPP-1364)

Change-Id: I3cb89dbfb7174b9913a8c4ad9b3b1dc9f6ed6326
Signed-off-by: Matus Fabian <matfabia@cisco.com>

4 files changed, 121 insertions, 0 deletions

diff --git a/src/vnet/ip/ip.api b/src/vnet/ip/ip.api
index a34f0d0305f..954ec92967f 100644
--- a/src/vnet/ip/ip.api
+++ b/src/vnet/ip/ip.api
@@ -673,6 +673,19 @@ autoreply define ip_container_proxy_add_del
   u8 is_add;
 };
 
+define ip_container_proxy_dump
+{
+  u32 client_index;
+  u32 context;
+};
+
+define ip_container_proxy_details
+{
+  u32 context;
+  u32 sw_if_index;
+  vl_api_prefix_t prefix;
+};
+
 /** \brief Configure IP source and L4 port-range check
     @param client_index - opaque cookie to identify the sender
     @param context - sender context, to match reply w/ request
diff --git a/src/vnet/ip/ip_api.c b/src/vnet/ip/ip_api.c
index 91832a07e09..4355d11e792 100644
--- a/src/vnet/ip/ip_api.c
+++ b/src/vnet/ip/ip_api.c
@@ -45,6 +45,7 @@
 #include <vnet/ip/ip4_reassembly.h>
 #include <vnet/ip/ip6_reassembly.h>
 #include <vnet/ethernet/arp.h>
+#include <vnet/ip/ip_types_api.h>
 
 #include <vnet/vnet_msg_enum.h>
 
@@ -102,6 +103,7 @@ _(SW_INTERFACE_IP6_ENABLE_DISABLE, sw_interface_ip6_enable_disable )    \
 _(SW_INTERFACE_IP6_SET_LINK_LOCAL_ADDRESS, 				\
   sw_interface_ip6_set_link_local_address)				\
 _(IP_CONTAINER_PROXY_ADD_DEL, ip_container_proxy_add_del)               \
+_(IP_CONTAINER_PROXY_DUMP, ip_container_proxy_dump)                     \
 _(IOAM_ENABLE, ioam_enable)                                             \
 _(IOAM_DISABLE, ioam_disable)                                           \
 _(IP_SOURCE_AND_PORT_RANGE_CHECK_ADD_DEL,                               \
@@ -1944,6 +1946,53 @@ static void
   REPLY_MACRO (VL_API_IP_CONTAINER_PROXY_ADD_DEL_REPLY);
 }
 
+typedef struct ip_container_proxy_walk_ctx_t_
+{
+  vl_api_registration_t *reg;
+  u32 context;
+} ip_container_proxy_walk_ctx_t;
+
+static int
+ip_container_proxy_send_details (const fib_prefix_t * pfx, u32 sw_if_index,
+				 void *args)
+{
+  vl_api_ip_container_proxy_details_t *mp;
+  ip_container_proxy_walk_ctx_t *ctx = args;
+
+  mp = vl_msg_api_alloc (sizeof (*mp));
+  if (!mp)
+    return 1;
+
+  memset (mp, 0, sizeof (*mp));
+  mp->_vl_msg_id = ntohs (VL_API_IP_CONTAINER_PROXY_DETAILS);
+  mp->context = ctx->context;
+
+  mp->sw_if_index = ntohl (sw_if_index);
+  ip_prefix_encode (pfx, &mp->prefix);
+
+  vl_api_send_msg (ctx->reg, (u8 *) mp);
+
+  return 1;
+}
+
+static void
+vl_api_ip_container_proxy_dump_t_handler (vl_api_ip_container_proxy_dump_t *
+					  mp)
+{
+  vl_api_registration_t *reg;
+
+  reg = vl_api_client_index_to_registration (mp->client_index);
+  if (!reg)
+    return;
+
+  ip_container_proxy_walk_ctx_t ctx = {
+    .context = mp->context,
+    .reg = reg,
+  };
+
+  ip_container_proxy_walk (ip_container_proxy_send_details, &ctx);
+}
+
 static void
 vl_api_ioam_enable_t_handler (vl_api_ioam_enable_t * mp)
 {
diff --git a/src/vnet/ip/lookup.c b/src/vnet/ip/lookup.c
index 42509972a98..017ca0db39b 100644
--- a/src/vnet/ip/lookup.c
+++ b/src/vnet/ip/lookup.c
@@ -1321,6 +1321,61 @@ ip_container_proxy_is_set (fib_prefix_t * pfx, u32 sw_if_index)
   return (l3p->l3p_sw_if_index == sw_if_index);
 }
 
+typedef struct ip_container_proxy_walk_ctx_t_
+{
+  ip_container_proxy_cb_t cb;
+  void *ctx;
+} ip_container_proxy_walk_ctx_t;
+
+static fib_table_walk_rc_t
+ip_container_proxy_fib_table_walk (fib_node_index_t fei, void *arg)
+{
+  ip_container_proxy_walk_ctx_t *ctx = arg;
+  const fib_prefix_t *pfx;
+  const dpo_id_t *dpo;
+  load_balance_t *lb;
+  l3_proxy_dpo_t *l3p;
+
+  pfx = fib_entry_get_prefix (fei);
+  if (fib_entry_is_sourced (fei, FIB_SOURCE_PROXY))
+    {
+      dpo = fib_entry_contribute_ip_forwarding (fei);
+      lb = load_balance_get (dpo->dpoi_index);
+      dpo = load_balance_get_bucket_i (lb, 0);
+      l3p = l3_proxy_dpo_get (dpo->dpoi_index);
+      ctx->cb (pfx, l3p->l3p_sw_if_index, ctx->ctx);
+    }
+
+  return FIB_TABLE_WALK_CONTINUE;
+}
+
+void
+ip_container_proxy_walk (ip_container_proxy_cb_t cb, void *ctx)
+{
+  fib_table_t *fib_table;
+  ip_container_proxy_walk_ctx_t wctx = {
+    .cb = cb,
+    .ctx = ctx,
+  };
+
+  /* *INDENT-OFF* */
+  pool_foreach (fib_table, ip4_main.fibs,
+  ({
+    fib_table_walk(fib_table->ft_index,
+                   FIB_PROTOCOL_IP4,
+                   ip_container_proxy_fib_table_walk,
+                   &wctx);
+  }));
+  pool_foreach (fib_table, ip6_main.fibs,
+  ({
+    fib_table_walk(fib_table->ft_index,
+                   FIB_PROTOCOL_IP6,
+                   ip_container_proxy_fib_table_walk,
+                   &wctx);
+  }));
+  /* *INDENT-ON* */
+}
+
 clib_error_t *
 ip_container_cmd (vlib_main_t * vm,
 		  unformat_input_t * main_input, vlib_cli_command_t * cmd)
diff --git a/src/vnet/ip/lookup.h b/src/vnet/ip/lookup.h
index 93e1e029b41..374023835f4 100644
--- a/src/vnet/ip/lookup.h
+++ b/src/vnet/ip/lookup.h
@@ -236,6 +236,10 @@ typedef struct _vnet_ip_container_proxy_args
 clib_error_t *vnet_ip_container_proxy_add_del (vnet_ip_container_proxy_args_t
 					       * args);
 
+typedef int (*ip_container_proxy_cb_t) (const fib_prefix_t * pfx,
+					u32 sw_if_index, void *ctx);
+void ip_container_proxy_walk (ip_container_proxy_cb_t cb, void *ctx);
+
 void ip_lookup_init (ip_lookup_main_t * lm, u32 ip_lookup_node_index);
 
 #endif /* included_ip_lookup_h */