ONE-13: Add CLI/API for LISP static remote mappings

Change-Id: Ic4c717af9629541bac0a0e6c65d0157619c8f578
Signed-off-by: Filip Tehlar <ftehlar@cisco.com>

7 files changed, 482 insertions, 1 deletions

diff --git a/vnet/vnet/lisp-cp/control.c b/vnet/vnet/lisp-cp/control.c
index 3e50d92a07b..2d3c2d7471b 100644
--- a/vnet/vnet/lisp-cp/control.c
+++ b/vnet/vnet/lisp-cp/control.c
@@ -21,6 +21,13 @@
 static void
 add_fwd_entry (lisp_cp_main_t* lcm, u32 src_map_index, u32 dst_map_index);
 
+static void
+del_fwd_entry (lisp_cp_main_t * lcm, u32 src_map_index, u32 dst_map_index);
+
+static u8
+compare_locators (lisp_cp_main_t *lcm, u32 * old_ls_indexes,
+                  locator_t * new_locators);
+
 /* Stores mapping in map-cache. It does NOT program data plane forwarding for
  * remote/learned mappings. */
 int
@@ -252,6 +259,242 @@ VLIB_CLI_COMMAND (lisp_add_del_local_eid_command) = {
     .function = lisp_add_del_local_eid_command_fn,
 };
 
+/**
+ * Adds/removes/updates static remote mapping.
+ *
+ * This function also modifies forwarding entries if needed.
+ *
+ * @param deid destination EID
+ * @param seid source EID
+ * @param rlocs vector of remote locators
+ * @param action action for negative map-reply
+ * @param is_add add mapping if non-zero, delete otherwise
+ * @return return code
+ */
+int
+vnet_lisp_add_del_remote_mapping (gid_address_t * deid, gid_address_t * seid,
+                                  ip_address_t * rlocs, u8 action, u8 is_add)
+{
+  vnet_lisp_add_del_mapping_args_t _dm_args, * dm_args = &_dm_args;
+  vnet_lisp_add_del_mapping_args_t _sm_args, * sm_args = &_sm_args;
+  vnet_lisp_add_del_locator_set_args_t _ls, * ls = &_ls;
+  lisp_cp_main_t * lcm = vnet_lisp_cp_get_main ();
+  u32 mi, ls_index = 0, dst_map_index, src_map_index;
+  locator_t loc;
+  ip_address_t * dl;
+  int rc = -1;
+
+  memset (sm_args, 0, sizeof (sm_args[0]));
+  memset (dm_args, 0, sizeof (dm_args[0]));
+  memset (ls, 0, sizeof (ls[0]));
+
+  /* prepare remote locator set */
+  vec_foreach (dl, rlocs)
+    {
+      memset (&loc, 0, sizeof (loc));
+      gid_address_ip (&loc.address) = dl[0];
+      vec_add1 (ls->locators, loc);
+    }
+  src_map_index = gid_dictionary_lookup (&lcm->mapping_index_by_gid, seid);
+
+  mi = gid_dictionary_lookup (&lcm->mapping_index_by_gid, deid);
+  /* new mapping */
+  if ((u32)~0 == mi)
+    {
+      if ((u32)~0 == src_map_index)
+        {
+          clib_warning ("seid %U not found!", format_gid_address, seid);
+          goto done;
+        }
+
+      if (!is_add)
+        {
+          clib_warning ("deid %U marked for removal but not "
+                        "found!", format_gid_address, deid);
+          goto done;
+        }
+
+      ls->is_add = 1;
+      ls->index = ~0;
+      vnet_lisp_add_del_locator_set (ls, &ls_index);
+
+      /* add mapping */
+      gid_address_copy (&dm_args->deid, deid);
+      dm_args->is_add = 1;
+      dm_args->action = action;
+      dm_args->locator_set_index = ls_index;
+      vnet_lisp_add_del_mapping (dm_args, &dst_map_index);
+
+      /* add fwd tunnel */
+      add_fwd_entry (lcm, src_map_index, dst_map_index);
+    }
+  else
+    {
+      /* delete mapping */
+      if (!is_add)
+        {
+          /* delete forwarding entry */
+          del_fwd_entry (lcm, 0, mi);
+          dm_args->is_add = 0;
+          gid_address_copy (&dm_args->deid, deid);
+          mapping_t * map = pool_elt_at_index (lcm->mapping_pool, mi);
+          dm_args->locator_set_index = map->locator_set_index;
+
+          /* delete mapping associated to fwd entry */
+          vnet_lisp_add_del_mapping (dm_args, 0);
+
+          ls->is_add = 0;
+          ls->index = map->locator_set_index;
+          /* delete locator set */
+          vnet_lisp_add_del_locator_set (ls, 0);
+        }
+      /* update existing locator set */
+      else
+        {
+          if ((u32)~0 == src_map_index)
+            {
+              clib_warning ("seid %U not found!", format_gid_address, seid);
+              goto done;
+            }
+
+          mapping_t * old_map;
+          locator_set_t * old_ls;
+          old_map = pool_elt_at_index (lcm->mapping_pool, mi);
+
+          /* update mapping attributes */
+          old_map->action = action;
+
+          old_ls = pool_elt_at_index(lcm->locator_set_pool,
+                                     old_map->locator_set_index);
+          if (compare_locators (lcm, old_ls->locator_indices,
+                                ls->locators))
+            {
+              /* set locator-set index to overwrite */
+              ls->is_add = 1;
+              ls->index = old_map->locator_set_index;
+              vnet_lisp_add_del_locator_set (ls, 0);
+              add_fwd_entry (lcm, src_map_index, mi);
+            }
+        }
+    }
+  /* success */
+  rc = 0;
+done:
+  vec_free (ls->locators);
+  return rc;
+}
+
+/**
+ * Handler for add/del remote mapping CLI.
+ *
+ * @param vm vlib context
+ * @param input input from user
+ * @param cmd cmd
+ * @return pointer to clib error structure
+ */
+static clib_error_t *
+lisp_add_del_remote_mapping_command_fn (vlib_main_t * vm,
+                                        unformat_input_t * input,
+                                        vlib_cli_command_t * cmd)
+{
+  clib_error_t * error = 0;
+  unformat_input_t _line_input, * line_input = &_line_input;
+  u8 is_add = 1;
+  ip_address_t rloc, * rlocs = 0;
+  ip_prefix_t * deid_ippref, * seid_ippref;
+  gid_address_t seid, deid;
+  u8 deid_set = 0, seid_set = 0;
+  u32 vni, action = ~0;
+
+  /* Get a line of input. */
+  if (! unformat_user (input, unformat_line_input, line_input))
+    return 0;
+
+  memset (&deid, 0, sizeof (deid));
+  memset (&seid, 0, sizeof (seid));
+
+  seid_ippref = &gid_address_ippref(&seid);
+  deid_ippref = &gid_address_ippref(&deid);
+
+  gid_address_type (&deid) = GID_ADDR_IP_PREFIX;
+  gid_address_type (&seid) = GID_ADDR_IP_PREFIX;
+
+  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (line_input, "del"))
+        is_add = 0;
+      if (unformat (line_input, "add"))
+        ;
+      else if (unformat (line_input, "deid %U",
+                         unformat_ip_prefix, deid_ippref))
+        {
+          deid_set = 1;
+        }
+      else if (unformat (line_input, "vni %u", &vni))
+        {
+          gid_address_set_vni (&seid, vni);
+          gid_address_set_vni (&deid, vni);
+        }
+      else if (unformat (line_input, "seid %U",
+                         unformat_ip_prefix, seid_ippref))
+        seid_set = 1;
+      else if (unformat (line_input, "rloc %U", unformat_ip_address, &rloc))
+        vec_add1 (rlocs, rloc);
+      else if (unformat (line_input, "action %d", &action))
+        ;
+      else
+        {
+          clib_warning ("parse error");
+          goto done;
+        }
+    }
+
+  if (is_add && (!deid_set || !seid_set))
+    {
+      clib_warning ("missing paramete(s)!");
+      goto done;
+    }
+
+  if (!is_add && !deid_set)
+    {
+      clib_warning ("missing deid!");
+      goto done;
+    }
+
+  if (is_add
+      && (ip_prefix_version (deid_ippref)
+        != ip_prefix_version (seid_ippref)))
+    {
+      clib_warning ("source and destination EIDs are not"
+                    " in the same IP family!");
+      goto done;
+    }
+
+  if (is_add && (~0 == action)
+      && 0 == vec_len (rlocs))
+    {
+      clib_warning ("no action set for negative map-reply!");
+      goto done;
+    }
+
+  int rv = vnet_lisp_add_del_remote_mapping (&deid, &seid, rlocs,
+                                             action, is_add);
+  if (rv)
+    clib_warning ("failed to %s remote mapping!",
+                  is_add ? "add" : "delete");
+
+done:
+  unformat_free (line_input);
+  return error;
+}
+
+VLIB_CLI_COMMAND (lisp_add_del_remote_mapping_command) = {
+    .path = "lisp remote-mapping",
+    .short_help = "lisp remote-mapping add|del vni <vni> deid <dest-eid> "
+     "seid <src-eid> rloc <dst-locator> [rloc <dst-locator> ... ]",
+    .function = lisp_add_del_remote_mapping_command_fn,
+};
+
 static clib_error_t *
 lisp_show_local_eid_table_command_fn (vlib_main_t * vm,
                                       unformat_input_t * input,
@@ -1467,7 +1710,7 @@ ip_interface_get_first_ip_addres (ip_lookup_main_t *lm, u32 sw_if_index,
   return ip_interface_address_get_address (lm, ia);
 }
 
-void
+static void
 del_fwd_entry (lisp_cp_main_t * lcm, u32 src_map_index,
                u32 dst_map_index)
 {
diff --git a/vnet/vnet/lisp-cp/control.h b/vnet/vnet/lisp-cp/control.h
index fad90e6ec68..ecab1dba091 100644
--- a/vnet/vnet/lisp-cp/control.h
+++ b/vnet/vnet/lisp-cp/control.h
@@ -175,4 +175,8 @@ vnet_lisp_cp_get_main() {
 clib_error_t * vnet_lisp_enable_disable (u8 is_enabled);
 u8 vnet_lisp_enable_disable_status (void);
 
+int
+vnet_lisp_add_del_remote_mapping (gid_address_t * deid, gid_address_t * seid,
+                                  ip_address_t * dlocs, u8 action, u8 is_add);
+
 #endif /* VNET_CONTROL_H_ */
diff --git a/vnet/vnet/lisp-cp/lisp_types.h b/vnet/vnet/lisp-cp/lisp_types.h
index 8db3cfe7338..21e24fb3aee 100644
--- a/vnet/vnet/lisp-cp/lisp_types.h
+++ b/vnet/vnet/lisp-cp/lisp_types.h
@@ -165,6 +165,9 @@ u32 gid_address_parse (u8 * offset, gid_address_t *a);
 #define gid_address_lcaf(_a) (_a)->lcaf
 #define gid_address_vni(_a) ( (GID_ADDR_LCAF == gid_address_type(_a)) ? \
                               lcaf_vni(&gid_address_lcaf(_a)) : 0)
+/* setter for vni  */
+#define gid_address_set_vni(_a, _val) \
+  (lcaf_vni(&gid_address_lcaf(_a)) = (_val))
 
 /* 'sub'address functions */
 u16 ip_prefix_size_to_write (void * pref);
diff --git a/vnet/vnet/lisp-gpe/lisp_gpe.c b/vnet/vnet/lisp-gpe/lisp_gpe.c
index c09b322b090..c00a9cf43b6 100644
--- a/vnet/vnet/lisp-gpe/lisp_gpe.c
+++ b/vnet/vnet/lisp-gpe/lisp_gpe.c
@@ -350,6 +350,7 @@ lisp_gpe_add_del_fwd_entry_command_fn (vlib_main_t * vm,
  done:
   vec_free(eids);
   vec_free(slocators);
+  vec_free(dlocators);
   return error;
 }
 
diff --git a/vpp-api-test/vat/api_format.c b/vpp-api-test/vat/api_format.c
index 496b2d60d76..bf1a3931b0b 100644
--- a/vpp-api-test/vat/api_format.c
+++ b/vpp-api-test/vat/api_format.c
@@ -9810,6 +9810,132 @@ api_lisp_enable_disable (vat_main_t * vam)
   return 0;
 }
 
+/** Used for transferring locators via VPP API */
+typedef CLIB_PACKED(struct
+{
+    u8 is_ip4; /**< is locator an IPv4 address? */
+    u8 addr[16]; /**< IPv4/IPv6 address */
+}) rloc_t;
+
+/**
+ * Add/del remote mapping from LISP control plane and updates
+ * forwarding entries in data-plane accordingly.
+ *
+ * @param vam vpp API test context
+ * @return return code
+ */
+static int
+api_lisp_add_del_remote_mapping (vat_main_t * vam)
+{
+    unformat_input_t * input = vam->input;
+    vl_api_lisp_add_del_remote_mapping_t *mp;
+    f64 timeout = ~0;
+    u32 vni = 0;
+    u8 seid_set = 0, deid_set = 0;
+    ip4_address_t seid4, deid4, rloc4;
+    ip6_address_t seid6, deid6, rloc6;
+    u32 seid_len = 0, deid_len = 0, len;
+    u8 deid_is_ip4 = 0, seid_is_ip4 = 0;
+    u8 is_add = 1;
+    u32 action = ~0;
+    rloc_t * rlocs = 0, rloc;
+
+    /* Parse args required to build the message */
+    while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) {
+        if (unformat(input, "del")) {
+            is_add = 0;
+        } else if (unformat(input, "add")) {
+            is_add = 1;
+        } else if (unformat(input, "deid %U/%d", unformat_ip4_address,
+                            &deid4, &len)) {
+            deid_set = 1;
+            deid_is_ip4 = 1;
+            deid_len = len;
+        } else if (unformat(input, "deid %U/%d", unformat_ip6_address,
+                            &deid6, &len)) {
+            deid_set = 1;
+            deid_is_ip4 = 0;
+            deid_len = len;
+        } else if (unformat(input, "seid %U/%d", unformat_ip4_address,
+                            &seid4, &len)) {
+            seid_set = 1;
+            seid_is_ip4 = 1;
+            seid_len = len;
+        } else if (unformat(input, "seid %U/%d", unformat_ip6_address,
+                            &seid6, &len)) {
+            seid_set = 1;
+            seid_is_ip4 = 0;
+            seid_len = len;
+        } else if (unformat(input, "vni %d", &vni)) {
+            ;
+        } else if (unformat(input, "rloc %U", unformat_ip4_address, &rloc4)) {
+            rloc.is_ip4 = 1;
+            clib_memcpy (&rloc.addr, &rloc4, sizeof (rloc4));
+            vec_add1 (rlocs, rloc);
+        } else if (unformat(input, "rloc %U", unformat_ip6_address, &rloc6)) {
+            rloc.is_ip4 = 0;
+            clib_memcpy (&rloc.addr, &rloc6, sizeof (rloc6));
+            vec_add1 (rlocs, rloc);
+        } else if (unformat(input, "action %d", &action)) {
+            ;
+        } else {
+            clib_warning ("parse error '%U'", format_unformat_error, input);
+            return -99;
+        }
+    }
+
+    if (!seid_set || !deid_set) {
+        errmsg ("missing params!");
+        return -99;
+    }
+
+    if (seid_is_ip4 != deid_is_ip4) {
+        errmsg ("source and destination EIDs are not in " "same IP family!");
+        return -99;
+    }
+
+    if (is_add && (~0 == action)
+        && 0 == vec_len (rlocs)) {
+          errmsg ("no action set for negative map-reply!");
+          return -99;
+    }
+
+    M(LISP_ADD_DEL_REMOTE_MAPPING, lisp_add_del_remote_mapping);
+    mp->is_add = is_add;
+    mp->vni = htonl (vni);
+    mp->seid_len = seid_len;
+    mp->action = (u8) action;
+    mp->deid_len = deid_len;
+    if (seid_is_ip4) {
+        mp->eid_is_ip4 = 1;
+        clib_memcpy (mp->seid, &seid4, sizeof (seid4));
+    } else {
+        mp->eid_is_ip4 = 0;
+        clib_memcpy (mp->seid, &seid6, sizeof (seid6));
+    }
+
+    if (deid_is_ip4) {
+        mp->eid_is_ip4 = 1;
+        clib_memcpy (mp->deid, &deid4, sizeof (deid4));
+    } else {
+        mp->eid_is_ip4 = 0;
+        clib_memcpy (mp->deid, &deid6, sizeof (deid6));
+    }
+
+    mp->rloc_num = vec_len (rlocs);
+    clib_memcpy (mp->rlocs, rlocs, (sizeof (rloc_t) * vec_len (rlocs)));
+    vec_free (rlocs);
+
+    /* send it... */
+    S;
+
+    /* Wait for a reply... */
+    W;
+
+    /* NOTREACHED */
+    return 0;
+}
+
 static int
 api_lisp_gpe_add_del_iface(vat_main_t * vam)
 {
@@ -10556,6 +10682,9 @@ _(lisp_add_del_map_resolver, "<ip4|6-addr> [del]")                      \
 _(lisp_gpe_enable_disable, "enable|disable")                            \
 _(lisp_enable_disable, "enable|disable")                                \
 _(lisp_gpe_add_del_iface, "up|down")                                    \
+_(lisp_add_del_remote_mapping, "add|del vni <vni> deid <dest-eid> seid" \
+                               " <src-eid> rloc <locator> "             \
+                               "[rloc <loc> ... ]")                     \
 _(lisp_locator_set_dump, "")                                            \
 _(lisp_local_eid_table_dump, "")                                        \
 _(lisp_gpe_tunnel_dump, "")                                             \
diff --git a/vpp/api/api.c b/vpp/api/api.c
index 24f7d9c0e19..0d5f224118e 100644
--- a/vpp/api/api.c
+++ b/vpp/api/api.c
@@ -326,6 +326,7 @@ _(LISP_ADD_DEL_MAP_RESOLVER, lisp_add_del_map_resolver)                 \
 _(LISP_GPE_ENABLE_DISABLE, lisp_gpe_enable_disable)                     \
 _(LISP_ENABLE_DISABLE, lisp_enable_disable)                             \
 _(LISP_GPE_ADD_DEL_IFACE, lisp_gpe_add_del_iface)                       \
+_(LISP_ADD_DEL_REMOTE_MAPPING, lisp_add_del_remote_mapping)             \
 _(LISP_LOCATOR_SET_DUMP, lisp_locator_set_dump)                         \
 _(LISP_LOCAL_EID_TABLE_DUMP, lisp_local_eid_table_dump)                 \
 _(LISP_GPE_TUNNEL_DUMP, lisp_gpe_tunnel_dump)                           \
@@ -4823,6 +4824,13 @@ vl_api_lisp_gpe_add_del_iface_t_handler(
     REPLY_MACRO(VL_API_LISP_GPE_ADD_DEL_IFACE_REPLY);
 }
 
+/** Used for transferring locators via VPP API */
+typedef CLIB_PACKED(struct
+{
+  u8 is_ip4; /**< is locator an IPv4 address */
+  u8 addr[16]; /**< IPv4/IPv6 address */
+}) rloc_t;
+
 static void
 send_lisp_locator_set_details_set_address
 (vl_api_lisp_locator_set_details_t *rmp,
@@ -4841,6 +4849,62 @@ send_lisp_locator_set_details_set_address
 }
 
 static void
+vl_api_lisp_add_del_remote_mapping_t_handler (
+    vl_api_lisp_add_del_remote_mapping_t *mp)
+{
+    u32 i;
+    ip_address_t rloc, * rlocs = 0;
+    vl_api_lisp_add_del_remote_mapping_reply_t * rmp;
+    int rv = 0;
+    gid_address_t _seid, * seid = &_seid;
+    gid_address_t _deid, * deid = &_deid;
+    ip_prefix_t * seid_pref = &gid_address_ippref(seid);
+    ip_prefix_t * deid_pref = &gid_address_ippref(deid);
+
+    gid_address_type(seid) = GID_ADDR_IP_PREFIX;
+    gid_address_type(deid) = GID_ADDR_IP_PREFIX;
+    ip_address_t * seid_addr = &ip_prefix_addr(seid_pref);
+    ip_address_t * deid_addr = &ip_prefix_addr(deid_pref);
+    ip_prefix_len(seid_pref) = mp->seid_len;
+    ip_prefix_len(deid_pref) = mp->deid_len;
+    gid_address_set_vni (seid, ntohl (mp->vni));
+    gid_address_set_vni (deid, ntohl (mp->vni));
+
+    if (mp->eid_is_ip4) {
+        ip_prefix_version(seid_pref) = IP4;
+        ip_prefix_version(deid_pref) = IP4;
+        clib_memcpy (&ip_addr_v4(seid_addr),
+                     mp->seid, sizeof (ip_addr_v4(seid_addr)));
+        clib_memcpy (&ip_addr_v4(deid_addr),
+                     mp->deid, sizeof (ip_addr_v4(deid_addr)));
+    } else {
+        ip_prefix_version(seid_pref) = IP6;
+        ip_prefix_version(deid_pref) = IP6;
+        clib_memcpy (&ip_addr_v6(seid_addr),
+                     mp->seid, sizeof (ip_addr_v6(seid_addr)));
+        clib_memcpy (&ip_addr_v6(deid_addr),
+                     mp->deid, sizeof (ip_addr_v6(deid_addr)));
+    }
+
+    for (i = 0; i < mp->rloc_num; i++) {
+        rloc_t * r = &((rloc_t *) mp->rlocs)[i];
+        if (r->is_ip4) {
+            clib_memcpy (&ip_addr_v4(&rloc), &r->addr, sizeof (rloc_t));
+            ip_addr_version (&rloc) = IP4;
+        } else {
+            clib_memcpy (&ip_addr_v6(&rloc), &r->addr, sizeof (rloc_t));
+            ip_addr_version (&rloc) = IP6;
+        }
+        vec_add1 (rlocs, rloc);
+    }
+
+    rv = vnet_lisp_add_del_remote_mapping (deid, seid, rlocs,
+                                           mp->action, mp->is_add);
+    vec_free (rlocs);
+    REPLY_MACRO(VL_API_LISP_GPE_ADD_DEL_IFACE_REPLY);
+}
+
+static void
 send_lisp_locator_set_details (lisp_cp_main_t *lcm,
                                locator_set_t *lsit,
                                unix_shared_memory_queue_t *q,
diff --git a/vpp/api/vpe.api b/vpp/api/vpe.api
index fadecfb1966..df3b2af0e3c 100644
--- a/vpp/api/vpe.api
+++ b/vpp/api/vpe.api
@@ -2377,6 +2377,43 @@ define lisp_gpe_add_del_iface_reply {
     i32 retval;
 };
 
+/** \brief add or delete remote static mapping
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param is_add - add address if non-zero, else delete
+    @param vni - virtual network instance
+    @param action - negative map-reply action
+    @param eid_is_ip4 - ipv4/6 of source and destination EIDs
+    @param deid - destination EID
+    @param seid - source EID
+    @param rloc_num - number of remote locators
+    @param rlocs - remote locator data
+*/
+define lisp_add_del_remote_mapping {
+    u32 client_index;
+    u32 context;
+    u8  is_add;
+    u32 vni;
+    u8 action;
+    u8 eid_is_ip4;
+    u8 deid[16];
+    u8 seid[16];
+    u8 deid_len;
+    u8 seid_len;
+    u32 rloc_num;
+    u8 rlocs[0];
+};
+
+/** \brief Reply for lisp_add_del_remote_mapping
+    @param context - returned sender context, to match reply w/ request
+    @param retval - return code
+*/
+
+define lisp_add_del_remote_mapping_reply {
+    u32 context;
+    i32 retval;
+};
+
 /** \brief LISP locator_set status
     @param locator_set_name - name of the locator_set
     @param sw_if_index - sw_if_index of the locator