From bac3da61644515f05663789b122554dc77549286 Mon Sep 17 00:00:00 2001 From: Luca Muscariello Date: Thu, 17 Jan 2019 13:47:57 +0100 Subject: This is the first commit of the hicn project Change-Id: I6f2544ad9b9f8891c88cc4bcce3cf19bd3cc863f Signed-off-by: Luca Muscariello --- hicn-plugin/src/faces/udp/face_udp.h | 248 +++++++++++++++++++++++++++++++++++ 1 file changed, 248 insertions(+) create mode 100755 hicn-plugin/src/faces/udp/face_udp.h (limited to 'hicn-plugin/src/faces/udp/face_udp.h') diff --git a/hicn-plugin/src/faces/udp/face_udp.h b/hicn-plugin/src/faces/udp/face_udp.h new file mode 100755 index 000000000..8694bad5c --- /dev/null +++ b/hicn-plugin/src/faces/udp/face_udp.h @@ -0,0 +1,248 @@ +/* + * Copyright (c) 2017-2019 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. + */ + +#ifndef __HICN_FACE_UDP_H__ +#define __HICN_FACE_UDP_H__ + +#include +#include +#include +#include + +#include "../face.h" + +/** + * @file + * @brief UDP face + * + * This file containes the definition of UDP faces. + * UDP faces encap and decap an hicn packet into a UDP tunnel. + * Src and dst address in interest and data packets are not considered and + * should be set to 0 (not checked in the forwarder). + */ + +/* Pre-instantiated ip header to fast fill an newly encapsulated packet */ +extern ip4_header_t ip4_header_skl; +extern ip6_header_t ip6_header_skl; + +#define INVALID_UDP_DPO_INDEX ~0 + +/** + * @brief UDP face representation. The following is stored in the data field of + * an hicn_face_t object (see hicn_face.h). A UDP face is identifies by the + * quadruplet (src addr, dst addr, src port, dst port). + */ +typedef struct hicn_face_udp_t_ +{ + /** + * The headers to paint, in packet painting order + */ + union + { + struct + { + ip4_header_t ip; + udp_header_t udp; + } __attribute__ ((packed)) ip4; + struct + { + ip6_header_t ip; + udp_header_t udp; + } __attribute__ ((packed)) ip6; + } __attribute__ ((packed)) hdrs; +} hicn_face_udp_t; + +/* Hast table mapping the udp key with the face id (dpoi_index pointing to and + element in the face pool defined in hicn_face.h)*/ +extern mhash_t hicn_face_udp_hashtb; + +/** + * @brief Hash table key. + */ +typedef struct hicn_face_udp_key_s +{ + ip46_address_t local_addr; + ip46_address_t remote_addr; + u16 local_port; + u16 remote_port; +} hicn_face_udp_key_t; + +/* DPO type for the udp face */ +extern dpo_type_t hicn_face_udp_type; + +/* VFT table for the udp face. Mainly used to format the face in the right way */ +extern hicn_face_vft_t udp_vft; + +/** + * @brief Create the key object for the mhash. Fill in the key object with the + * expected values. + * + * @param local_addr Local address of the UDP tunnel + * @param remote_addr Remote address of the UDP tunnel + * @param local_port Local port of the UDP tunnel + * @param remote_port Remote port of the UDP tunnel + * @param key Pointer to an allocated hicn_face_udp_key_t object + */ +always_inline void +hicn_face_udp4_get_key (const ip4_address_t * local_addr, + const ip4_address_t * remote_addr, + u16 local_port, u16 remote_port, + hicn_face_udp_key_t * key) +{ + + ip46_address_set_ip4 (&(key->local_addr), local_addr); + ip46_address_set_ip4 (&(key->remote_addr), remote_addr); + key->local_port = local_port; + key->remote_port = remote_port; +} + +/** + * @brief Create the key object for the mhash. Fill in the key object with the + * expected values. + * + * @param local_addr Local address of the UDP tunnel + * @param remote_addr Remote address of the UDP tunnel + * @param local_port Local port of the UDP tunnel + * @param remote_port Remote port of the UDP tunnel + * @param key Pointer to an allocated hicn_face_udp_key_t object + */ +always_inline void +hicn_face_udp6_get_key (const ip6_address_t * local_addr, + const ip6_address_t * remote_addr, + u16 local_port, u16 remote_port, + hicn_face_udp_key_t * key) +{ + key->local_addr.ip6 = *local_addr; + key->remote_addr.ip6 = *remote_addr; + key->local_port = local_port; + key->remote_port = remote_port; +} + +/** + * @brief Get the dpoi from the quadruplet that identifies the face. Does not add any lock. + * + * @param local_addr Local address of the UDP tunnel + * @param remote_addr Remote address of the UDP tunnel + * @param local_port Local port of the UDP tunnel + * @param remote_port Remote port of the UDP tunnel + * + * @result Pointer to the face. + */ +always_inline hicn_face_t * +hicn_face_udp4_get (const ip4_address_t * local_addr, + const ip4_address_t * remote_addr, + u16 local_port, u16 remote_port) +{ + hicn_face_udp_key_t key; + + hicn_face_udp4_get_key (local_addr, remote_addr, local_port, remote_port, + &key); + + hicn_face_id_t *dpoi_index = + (hicn_face_id_t *) mhash_get (&hicn_face_udp_hashtb, + &key); + + return dpoi_index == NULL ? NULL : hicn_dpoi_get_from_idx (*dpoi_index); +} + +/** + * @brief Get the dpoi from the quadruplet that identifies the face. Does not add any lock. + * + * @param local_addr Local address of the UDP tunnel (network order) + * @param remote_addr Remote address of the UDP tunnel (network order) + * @param local_port Local port of the UDP tunnel (network order) + * @param remote_port Remote port of the UDP tunnel (network order) + * + * @result Pointer to the face. + */ +always_inline hicn_face_t * +hicn_face_udp6_get (const ip6_address_t * local_addr, + const ip6_address_t * remote_addr, + u16 local_port, u16 remote_port) +{ + hicn_face_udp_key_t key; + + hicn_face_udp6_get_key (local_addr, remote_addr, local_port, remote_port, + &key); + + hicn_face_id_t *dpoi_index = + (hicn_face_id_t *) mhash_get (&hicn_face_udp_hashtb, + &key); + + return dpoi_index == NULL ? NULL : hicn_dpoi_get_from_idx (*dpoi_index); +} + + +/** + * @brief Initialize the udp face module + */ +void hicn_face_udp_init (vlib_main_t * vm); + +/** + * @brief Create a new face ip. API for other modules (e.g., routing) + * + * @param local_addr Local ip v4 or v6 address of the face (network order) + * @param remote_addr Remote ip v4 or v6 address of the face (network order) + * @param local_port Local udp port of the face (network order) + * @param remote_port Remote udp port of the face (network order) + * @param sw_if interface associated to the face + * @param pfaceid Pointer to return the face id + * @return HICN_ERROR_FACE_NO_GLOBAL_IP if the face does not have a globally + * reachable ip address, otherwise HICN_ERROR_NONE + */ +int hicn_face_udp_add (const ip46_address_t * local_addr, + const ip46_address_t * remote_addr, u16 local_port, + u16 remote_port, u32 swif, hicn_face_id_t * pfaceid); + +/** + * @brief Delete an ip face + * + * @param face_id Id of the face to delete + * @return HICN_ERROR_FACE_NOT_FOUND if the face does not exist, otherwise + * HICN_ERROR_NONE + */ +int hicn_face_udp_del (hicn_face_id_t faceid); + +/** + * @brief Format a UDP face + * + * @param s Pointer to a previous string. If null it will be initialize + * @param args Array storing input values. Expected u32 indent and u32 face_id + * @return String with the formatted face + */ +u8 *format_hicn_face_udp (u8 * s, va_list * args); + +/** + * @brief Create a dpo from a udp face + * + * @param face Face from which to create the dpo + * @return the dpo + */ +void hicn_face_udp_get_dpo (hicn_face_t * face, dpo_id_t * dpo); + +/** + * @brief Init some internal structures + */ +void hicn_face_udp_init_internal (void); + +#endif // __HICN_FACE_UDP_H__ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ -- cgit 1.2.3-korg