diff options
author | 2019-08-09 16:11:33 +0200 | |
---|---|---|
committer | 2019-10-07 09:07:07 +0200 | |
commit | 9f0aa8c27ee927b5c74b75fac72eaa782ff23a53 (patch) | |
tree | 09245b82718991417dcd8ca1b6e9de3b3b9c8ec8 /hicn-plugin/src/faces/ip/face_ip.c | |
parent | 85a791ac2cdd35d79c00141e748b4c68fbdafb0d (diff) |
[HICN-226]
Reworked incoming face identification on receiving a data packet. The output is now a list of possible incoming faces, plus a preferred one which cover the case in which the face is a local producer face. In that case we can identify the face uniquely as we are sure that we have one face for memif.
Change-Id: Ic48475a36e37a28cec8cc1448b4b4ee6c001efc0
Signed-off-by: Alberto Compagno <acompagn+fdio@cisco.com>
Diffstat (limited to 'hicn-plugin/src/faces/ip/face_ip.c')
-rw-r--r-- | hicn-plugin/src/faces/ip/face_ip.c | 341 |
1 files changed, 275 insertions, 66 deletions
diff --git a/hicn-plugin/src/faces/ip/face_ip.c b/hicn-plugin/src/faces/ip/face_ip.c index 6e279583c..23d3900ec 100644 --- a/hicn-plugin/src/faces/ip/face_ip.c +++ b/hicn-plugin/src/faces/ip/face_ip.c @@ -12,6 +12,8 @@ * License for the specific language governing permissions and limitations * under the License. */ +#include <vnet/adj/adj_midchain.h> +#include <vnet/adj/adj.h> #include "face_ip.h" #include "face_ip_node.h" @@ -96,62 +98,165 @@ hicn_face_ip_del (hicn_face_id_t face_id) hicn_face_ip_t *face_ip = (hicn_face_ip_t *) face->data; hicn_face_ip_key_t key; hicn_face_ip_key_t old_key; + hicn_face_ip_key_t old_key2; if (ip46_address_is_ip4 (&face_ip->local_addr)) { hicn_face_ip4_get_key (&(face_ip->local_addr.ip4), face->shared.sw_if, &key); - mhash_unset (&hicn_face_ip_local_hashtb, &key, (uword *) & old_key); - hicn_face_ip4_get_key (&(face_ip->remote_addr.ip4), face->shared.sw_if, - &key); - mhash_unset (&hicn_face_ip_remote_hashtb, &key, (uword *) & old_key); + hicn_face_ip_input_faces_t * in_faces_vec = hicn_face_ip4_get_vec(&(face_ip->local_addr.ip4), face->shared.sw_if, + &hicn_face_ip_local_hashtb); + if (in_faces_vec != NULL) + { + hicn_face_ip_vec_t * vec = pool_elt_at_index (hicn_vec_pool, in_faces_vec->vec_id); + u32 index_face = vec_search(*vec, face_id); + vec_del1(*vec, index_face); + + if (vec_len(*vec) == 0) + { + pool_put_index(hicn_vec_pool, in_faces_vec->vec_id); + mhash_unset (&hicn_face_ip_local_hashtb, &key, (uword *) & old_key); + vec_free(*vec); + } + else + { + /* Check if the face we are deleting is the preferred one. */ + /* If so, repleace with another. */ + if (in_faces_vec->face_id == face_id) + { + in_faces_vec->face_id = (*vec)[0]; + } + } + hicn_face_ip4_get_key (&(face_ip->remote_addr.ip4), face->shared.sw_if, + &key); + mhash_unset (&hicn_face_ip_remote_hashtb, &key, (uword *) & old_key2); + } } else { hicn_face_ip6_get_key (&(face_ip->local_addr.ip6), face->shared.sw_if, &key); - mhash_unset (&hicn_face_ip_local_hashtb, &key, (uword *) & old_key); - hicn_face_ip6_get_key (&(face_ip->remote_addr.ip6), face->shared.sw_if, - &key); - mhash_unset (&hicn_face_ip_remote_hashtb, &key, (uword *) & old_key); + + hicn_face_ip_input_faces_t * in_faces_vec = hicn_face_ip6_get_vec(&(face_ip->local_addr.ip6), face->shared.sw_if, + &hicn_face_ip_local_hashtb); + if (in_faces_vec != NULL) + { + hicn_face_ip_vec_t * vec = pool_elt_at_index (hicn_vec_pool, in_faces_vec->vec_id); + u32 index_face = vec_search(*vec, face_id); + vec_del1(*vec, index_face); + + if (vec_len(*vec) == 0) + { + pool_put(hicn_vec_pool, vec); + mhash_unset (&hicn_face_ip_local_hashtb, &key, (uword *) & old_key); + vec_free(*vec); + } + else + { + /* Check if the face we are deleting is the preferred one. */ + /* If so, repleace with another. */ + if (in_faces_vec->face_id == face_id) + { + in_faces_vec->face_id = (*vec)[0]; + } + } + hicn_face_ip6_get_key (&(face_ip->remote_addr.ip6), face->shared.sw_if, + &key); + mhash_unset (&hicn_face_ip_remote_hashtb, &key, (uword *) & old_key); + } } return hicn_face_del (face_id); } +/** + * @brief Helper for handling midchain adjacencies + */ +void face_midchain_fixup_t (vlib_main_t * vm, + struct ip_adjacency_t_ * adj, + vlib_buffer_t * b0, + const void *data) { + vnet_buffer (b0)->sw_if_index[VLIB_TX] = 0; +}; -/* - * Utility that adds a new face cache entry. For the moment we assume that - * the ip_adjacency has already been set up. +/** + * @brief Build a rewrite string for the face. */ -int -hicn_face_ip_add (const ip46_address_t * local_addr, - const ip46_address_t * remote_addr, - int sw_if, hicn_face_id_t * pfaceid) +static u8* +face_build_rewrite_i (void) { - /* fib_protocol_t fib_type; */ - /* vnet_link_t link_type; */ - adj_index_t adj; - dpo_proto_t dpo_proto; + /* + * passing the adj code a NULL rewrite means 'i don't have one cos + * t'other end is unresolved'. That's not the case here. For the mpls + * tunnel there are just no bytes of encap to apply in the adj. We'll impose + * the label stack once we choose a path. So return a zero length rewrite. + */ + u8 *rewrite = NULL; - /* Check if we found at least one ip address */ - if (ip46_address_is_zero (local_addr) || ip46_address_is_zero (remote_addr)) - return HICN_ERROR_FACE_NO_GLOBAL_IP; + vec_validate(rewrite, 0); + vec_reset_length(rewrite); + return (rewrite); +} + +always_inline int +hicn_face_ip_find_adj (const ip46_address_t * remote_addr, + int sw_if, adj_index_t * adj) +{ fib_prefix_t fib_pfx; fib_node_index_t fib_entry_index; fib_prefix_from_ip46_addr (remote_addr, &fib_pfx); fib_pfx.fp_len = ip46_address_is_ip4(remote_addr)? 32 : 128; + vnet_link_t link_type = ip46_address_is_ip4(&fib_pfx.fp_addr)? VNET_LINK_IP4 : VNET_LINK_IP6; + *adj = adj_nbr_find(fib_pfx.fp_proto, link_type, &fib_pfx.fp_addr, sw_if); - u32 fib_index = fib_table_find_or_create_and_lock (fib_pfx.fp_proto, - HICN_FIB_TABLE, - FIB_SOURCE_PLUGIN_HI); + if (*adj == ADJ_INDEX_INVALID) + { + u32 fib_index = fib_table_find_or_create_and_lock (fib_pfx.fp_proto, + HICN_FIB_TABLE, + FIB_SOURCE_PLUGIN_HI); + + fib_entry_index = fib_table_lookup (fib_index, &fib_pfx); + + if (fib_entry_index == (FIB_NODE_INDEX_INVALID)) + return HICN_ERROR_FACE_IP_ADJ_NOT_FOUND; + + *adj = fib_entry_get_adj (fib_entry_index); + ip_adjacency_t * temp = NULL; + if (*adj != ~0) + temp = adj_get(*adj); + + if (temp == NULL || temp->lookup_next_index <= IP_LOOKUP_NEXT_REWRITE) + { + if(sw_if != ~0) + *adj = adj_nbr_add_or_lock(fib_pfx.fp_proto, link_type, remote_addr, sw_if); + else + return HICN_ERROR_FACE_IP_ADJ_NOT_FOUND; + } + else + { + adj_nbr_midchain_update_rewrite(*adj, &face_midchain_fixup_t, NULL, ADJ_FLAG_NONE, face_build_rewrite_i()); + adj_midchain_delegate_stack(*adj, fib_index, &fib_pfx); + } + } - fib_entry_index = fib_table_lookup (fib_index, &fib_pfx); + return HICN_ERROR_NONE; +} - adj = fib_entry_get_adj (fib_entry_index); +/* + * Utility that adds a new face cache entry. For the moment we assume that + * the ip_adjacency has already been set up. + */ +int +hicn_face_ip_add (const ip46_address_t * local_addr, + const ip46_address_t * remote_addr, + int sw_if, hicn_face_id_t * pfaceid, + u8 is_app_prod) +{ + dpo_proto_t dpo_proto; - if (adj == ~0) - return HICN_ERROR_FACE_IP_ADJ_NOT_FOUND; + /* Check if we found at least one ip address */ + if (ip46_address_is_zero (remote_addr)) + return HICN_ERROR_FACE_NO_GLOBAL_IP; hicn_face_flags_t flags = (hicn_face_flags_t) 0; flags |= HICN_FACE_FLAGS_FACE; @@ -160,17 +265,10 @@ hicn_face_ip_add (const ip46_address_t * local_addr, if (ip46_address_is_ip4 (local_addr)) { face = - hicn_face_ip4_get (&(local_addr->ip4), sw_if, - &hicn_face_ip_local_hashtb); - - if (face != NULL) - return HICN_ERROR_FACE_ALREADY_CREATED; - - face = hicn_face_ip4_get (&(remote_addr->ip4), sw_if, &hicn_face_ip_remote_hashtb); - /* If remote matches the face is a iface */ + /* If remote matches the face we need to check if it is an incomplete face */ if (face == NULL) { hicn_iface_ip_add (local_addr, remote_addr, sw_if, pfaceid); @@ -181,31 +279,83 @@ hicn_face_ip_add (const ip46_address_t * local_addr, *pfaceid = hicn_dpoi_get_index (face); } + if (!(face->shared.flags & HICN_FACE_FLAGS_IFACE)) + return HICN_ERROR_FACE_ALREADY_CREATED; + hicn_face_ip_key_t key; hicn_face_ip4_get_key (&(local_addr->ip4), sw_if, &key); - mhash_set_mem (&hicn_face_ip_local_hashtb, &key, (uword *) pfaceid, 0); - - hicn_face_ip_t *ip_face = (hicn_face_ip_t *) face->data; - clib_memcpy (&ip_face->local_addr, local_addr, sizeof (ip4_address_t)); - clib_memcpy (&ip_face->remote_addr, remote_addr, - sizeof (ip4_address_t)); - face->shared.sw_if = sw_if; - face->shared.flags = flags; - face->shared.adj = adj; - - dpo_proto = DPO_PROTO_IP4; + hicn_face_ip_input_faces_t * in_faces = + hicn_face_ip4_get_vec (&(local_addr->ip4), sw_if, + &hicn_face_ip_local_hashtb); + + if (in_faces == NULL) + { + adj_index_t adj; + int ret = hicn_face_ip_find_adj(remote_addr, sw_if, &adj); + if (ret != HICN_ERROR_NONE) + return ret; + + hicn_face_ip_input_faces_t in_faces_temp; + hicn_face_ip_vec_t *vec; + pool_get(hicn_vec_pool, vec); + *vec = vec_new(hicn_face_ip_vec_t, 0); + u32 index = vec - hicn_vec_pool; + in_faces_temp.vec_id = index; + vec_add1(*vec, *pfaceid); + + hicn_face_ip_t *ip_face = (hicn_face_ip_t *) face->data; + clib_memcpy (&ip_face->local_addr, local_addr, sizeof (ip4_address_t)); + clib_memcpy (&ip_face->remote_addr, remote_addr, + sizeof (ip4_address_t)); + face->shared.sw_if = sw_if; + face->shared.flags = flags; + face->shared.adj = adj; + + dpo_proto = DPO_PROTO_IP4; + + in_faces_temp.face_id = *pfaceid; + + mhash_set_mem (&hicn_face_ip_local_hashtb, &key, (uword *) &in_faces_temp, 0); + } + else + { + hicn_face_ip_vec_t * vec = pool_elt_at_index(hicn_vec_pool, in_faces->vec_id); + + /* */ + if (vec_search(*vec, *pfaceid) != ~0) + return HICN_ERROR_FACE_ALREADY_CREATED; + + adj_index_t adj; + int ret = hicn_face_ip_find_adj(remote_addr, sw_if, &adj); + if (ret != HICN_ERROR_NONE) + return ret; + + vec_add1(*vec, *pfaceid); + + hicn_face_ip_t *ip_face = (hicn_face_ip_t *) face->data; + clib_memcpy (&ip_face->local_addr, local_addr, sizeof (ip4_address_t)); + clib_memcpy (&ip_face->remote_addr, remote_addr, + sizeof (ip4_address_t)); + face->shared.sw_if = sw_if; + face->shared.flags = flags; + face->shared.adj = adj; + + dpo_proto = DPO_PROTO_IP4; + + mhash_set_mem (&hicn_face_ip_local_hashtb, &key, (uword *) in_faces, 0); + + /* If the face is an application producer face, we set it as the preferred incoming face. */ + /* This is required to handle the CS separation, and the push api in a lightway*/ + if (is_app_prod) + { + in_faces->face_id = *pfaceid; + } + } } else { face = - hicn_face_ip6_get (&(local_addr->ip6), sw_if, - &hicn_face_ip_local_hashtb); - - if (face != NULL) - return HICN_ERROR_FACE_ALREADY_CREATED; - - face = hicn_face_ip6_get (&(remote_addr->ip6), sw_if, &hicn_face_ip_remote_hashtb); @@ -220,20 +370,79 @@ hicn_face_ip_add (const ip46_address_t * local_addr, *pfaceid = hicn_dpoi_get_index (face); } + if (!(face->shared.flags & HICN_FACE_FLAGS_IFACE)) + return HICN_ERROR_FACE_ALREADY_CREATED; + hicn_face_ip_key_t key; hicn_face_ip6_get_key (&(local_addr->ip6), sw_if, &key); - mhash_set_mem (&hicn_face_ip_local_hashtb, &key, (uword *) pfaceid, 0); - - hicn_face_ip_t *ip_face = (hicn_face_ip_t *) face->data; - clib_memcpy (&ip_face->local_addr, local_addr, sizeof (ip6_address_t)); - clib_memcpy (&ip_face->remote_addr, remote_addr, - sizeof (ip6_address_t)); - face->shared.sw_if = sw_if; - face->shared.flags = flags; - face->shared.adj = adj; - - dpo_proto = DPO_PROTO_IP6; + hicn_face_ip_input_faces_t * in_faces = + hicn_face_ip6_get_vec (&(local_addr->ip6), sw_if, + &hicn_face_ip_local_hashtb); + + if (in_faces == NULL) + { + adj_index_t adj; + int ret = hicn_face_ip_find_adj(remote_addr, sw_if, &adj); + if (ret != HICN_ERROR_NONE) + return ret; + + hicn_face_ip_input_faces_t in_faces_temp; + hicn_face_ip_vec_t *vec; + pool_get(hicn_vec_pool, vec); + vec_alloc(*vec, 1); + u32 index = vec - hicn_vec_pool; + in_faces_temp.vec_id = index; + vec_add1(*vec, *pfaceid); + + hicn_face_ip_t *ip_face = (hicn_face_ip_t *) face->data; + clib_memcpy (&ip_face->local_addr, local_addr, sizeof (ip6_address_t)); + clib_memcpy (&ip_face->remote_addr, remote_addr, + sizeof (ip6_address_t)); + face->shared.sw_if = sw_if; + face->shared.flags = flags; + face->shared.adj = adj; + + dpo_proto = DPO_PROTO_IP6; + + in_faces_temp.face_id = *pfaceid; + + mhash_set_mem (&hicn_face_ip_local_hashtb, &key, (uword *) &in_faces_temp, 0); + } + else + { + hicn_face_ip_vec_t *vec = pool_elt_at_index(hicn_vec_pool, in_faces->vec_id); + + /* */ + if (vec_search(*vec, *pfaceid) != ~0) + return HICN_ERROR_FACE_ALREADY_CREATED; + + adj_index_t adj; + int ret = hicn_face_ip_find_adj(remote_addr, sw_if, &adj); + if (ret != HICN_ERROR_NONE) + return ret; + + vec_add1(*vec, *pfaceid); + + hicn_face_ip_t *ip_face = (hicn_face_ip_t *) face->data; + clib_memcpy (&ip_face->local_addr, local_addr, sizeof (ip6_address_t)); + clib_memcpy (&ip_face->remote_addr, remote_addr, + sizeof (ip6_address_t)); + face->shared.sw_if = sw_if; + face->shared.flags = flags; + face->shared.adj = adj; + + dpo_proto = DPO_PROTO_IP6; + + mhash_set_mem (&hicn_face_ip_local_hashtb, &key, (uword *) in_faces, 0); + + /* If the face is an application producer face, we set it as the preferred incoming face. */ + /* This is required to handle the CS separation, and the push api in a lightway*/ + if (is_app_prod) + { + in_faces->face_id = *pfaceid; + } + } } retx_t *retx = vlib_process_signal_event_data (vlib_get_main (), |