222 lines
6.6 KiB
C
222 lines
6.6 KiB
C
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/*
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Copyright (c) 2013, The Linux Foundation. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials provided
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with the distribution.
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* Neither the name of The Linux Foundation nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*!
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@file
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IPA_Netlink.h
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@brief
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IPACM Netlink Messaging Implementation File
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@Author
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Skylar Chang
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*/
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#ifndef IPACM_NETLINK_H
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#define IPACM_NETLINK_H
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <pthread.h>
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#include <sys/select.h>
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#include <sys/socket.h>
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#include <linux/if.h>
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#include <linux/if_addr.h>
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#include <linux/rtnetlink.h>
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#include <linux/netlink.h>
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#include <netinet/in.h>
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#include "IPACM_Defs.h"
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#define MAX_NUM_OF_FD 10
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#define IPA_NL_MSG_MAX_LEN (1024)
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#define IF_NAME_LEN 16
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/*---------------------------------------------------------------------------
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Type representing enumeration of NetLink event indication messages
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---------------------------------------------------------------------------*/
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/*---------------------------------------------------------------------------
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Types representing parsed NetLink message
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---------------------------------------------------------------------------*/
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#define IPA_NLA_PARAM_NONE (0x0000)
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#define IPA_NLA_PARAM_PREFIXADDR (0x0001)
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#define IPA_NLA_PARAM_LOCALADDR (0x0002)
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#define IPA_NLA_PARAM_LABELNAME (0x0004)
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#define IPA_NLA_PARAM_BCASTADDR (0x0008)
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#define IPA_NLA_PARAM_ACASTADDR (0x0010)
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#define IPA_NLA_PARAM_MCASTADDR (0x0020)
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#define IPA_NLA_PARAM_CACHEINFO (0x0080)
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#define IPA_NLA_PARAM_PROTOINFO (0x0100)
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#define IPA_NLA_PARAM_FLAGS (0x0200)
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#define IPA_RTA_PARAM_NONE (0x0000)
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#define IPA_RTA_PARAM_DST (0x0001)
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#define IPA_RTA_PARAM_SRC (0x0002)
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#define IPA_RTA_PARAM_GATEWAY (0x0004)
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#define IPA_RTA_PARAM_IIF (0x0008)
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#define IPA_RTA_PARAM_OIF (0x0010)
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#define IPA_RTA_PARAM_CACHEINFO (0x0020)
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#define IPA_RTA_PARAM_PRIORITY (0x0080)
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#define IPA_RTA_PARAM_METRICS (0x0100)
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/*---------------------------------------------------------------------------
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Type representing function callback registered with a socket listener
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thread for reading from a socket on receipt of an incoming message
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---------------------------------------------------------------------------*/
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typedef int (*ipa_sock_thrd_fd_read_f)(int fd);
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typedef enum
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{
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IPA_INIT = 0,
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IPA_LINK_UP_WAIT,
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IPA_LINK_UP,
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IPA_LINK_DOWN_WAIT,
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IPA_LINK_DOWN
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} ipa_nl_state_e;
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typedef struct
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{
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int sk_fd;
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ipa_sock_thrd_fd_read_f read_func;
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} ipa_nl_sk_fd_map_info_t;
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typedef struct
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{
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ipa_nl_sk_fd_map_info_t sk_fds[MAX_NUM_OF_FD];
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fd_set fdset;
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int num_fd;
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int max_fd;
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} ipa_nl_sk_fd_set_info_t;
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typedef struct
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{
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int sk_fd; /* socket descriptor */
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struct sockaddr_nl sk_addr_loc; /* local address of socket */
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} ipa_nl_sk_info_t;
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typedef struct ipa_nl_addr_s {
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struct sockaddr_storage ip_addr;
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unsigned int mask;
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} ipa_nl_addr_t;
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typedef struct ipa_nl_proto_info_s {
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unsigned int param_mask;
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unsigned int flags;
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struct ifla_cacheinfo cache_info;
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} ipa_nl_proto_info_t;
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typedef struct
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{
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struct ifinfomsg metainfo; /* from header */
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} ipa_nl_link_info_t;
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typedef struct ipa_nl_addr_info_s {
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struct ifaddrmsg metainfo; /* from header */
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struct /* attributes */
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{
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unsigned int param_mask;
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unsigned char label_name[IF_NAME_LEN];
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struct sockaddr_storage prefix_addr;
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} attr_info;
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} ipa_nl_addr_info_t;
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typedef struct ipa_nl_neigh_info_s {
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struct ndmsg metainfo; /* from header */
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struct /* attributes */
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{
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unsigned int param_mask;
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struct sockaddr_storage local_addr;
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struct sockaddr lladdr_hwaddr;
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} attr_info;
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} ipa_nl_neigh_info_t;
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typedef struct ipa_nl_route_info_s {
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struct rtmsg metainfo; /* from header */
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struct /* attributes */
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{
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unsigned int param_mask;
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struct sockaddr_storage dst_addr;
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struct sockaddr_storage src_addr;
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struct sockaddr_storage gateway_addr;
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struct sockaddr_storage mark_addr;
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struct rta_cacheinfo cache_info;
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__u32 iif_index; /* Link index */
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__u32 oif_index; /* Link index */
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__u32 priority;
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__u32 metrics;
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ipa_nl_proto_info_t proto_info;
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} attr_info;
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} ipa_nl_route_info_t;
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#define IPA_FLOW_TYPE_INVALID (-1)
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typedef struct
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{
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unsigned int type;
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bool link_event;
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/* Optional parameters */
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ipa_nl_link_info_t nl_link_info;
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ipa_nl_addr_info_t nl_addr_info;
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ipa_nl_neigh_info_t nl_neigh_info;
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ipa_nl_route_info_t nl_route_info;
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} ipa_nl_msg_t;
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/* Initialization routine for listener on NetLink sockets interface */
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int ipa_nl_listener_init
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(
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unsigned int nl_type,
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unsigned int nl_groups,
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ipa_nl_sk_fd_set_info_t *sk_fdset,
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ipa_sock_thrd_fd_read_f read_f
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);
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/* Virtual function registered to receive incoming messages over the NETLINK routing socket*/
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int ipa_nl_recv_msg(int fd);
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/* map mask value for ipv6 */
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int mask_v6(int index, uint32_t *mask);
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#ifdef __cplusplus
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}
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#endif
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#endif /* IPACM_NETLINK_H */
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