agentadv.h

mobile ip 在linux下的一种实现

/* $Id: agentadv.h,v 1.29 2001/09/08 15:30:41 jm Exp $
 * ICMP Agent Advertisement/Solicitation routines
 *
 * Dynamic hierarchial IP tunnel
 * Copyright (C) 1998-2001, Dynamics group
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation. See README and COPYING for
 * more details.
 */

#ifndef AGENTADV_H
#define AGENTADV_H

#include "config.h"

#ifdef DYN_TARGET_LINUX
#include <features.h>    /* for the glibc version number */
#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1
#include <netpacket/packet.h>
#include <net/ethernet.h>     /* the L2 protocols */
#include <netinet/if_ether.h>
#else
#include <linux/if_packet.h>
#include <linux/if_ether.h>   /* The L2 protocols */
#endif
#include <netinet/ip.h>
#endif /* DYN_TARGET_LINUX */
#ifdef DYN_TARGET_WINDOWS
#include "windows_extra.h"
#endif /* DYN_TARGET_WINDOWS */

#include "message.h"

#ifndef ICMP_ROUTERADVERT
#define ICMP_ROUTERADVERT 9
#endif
#ifndef ICMP_ROUTERSOLICIT
#define ICMP_ROUTERSOLICIT 10
#endif

#define MAX_ADV_MSG 2048

/* ICMP_FILTER data for the filter argument of open_agent_icmp_socket() */
/* FA: accept: router sol. */
#define ICMP_FILTER_FA ~(1 << 10)
/* HA: accept: router sol. */
#define ICMP_FILTER_HA ~(1 << 10)
/* MN: accept: router adv. */
#define ICMP_FILTER_MN ~(1 << 9)

/* agent data needed in agent advertisement messages
 * must be initialized with set_agent_adv_data() at least once before sending
 * advertisements
 */
struct agentadv_setup_data {
	__u16 max_lifetime; /* max lifetime for bindings,
			     * in network byte order */
	__u16 adv_lifetime; /* lifetime for advertisements,
			     * in network byte order */
	__u32 highest_fa_addr;
	__u32 agent_own_addr;
	__u16 agent_adv_opt; /* options in network byte order */
	__u8 own_agent_adv_opt;
	unsigned char *hfa_pubkey_hash;
	int hfa_pubkey_hash_len;
	struct fa_nai_ext *fa_nai_extension;
	struct challenge_ext *challenge;

#ifdef INCLUDE_IPAY
	__u32 timePrice;
	__u32 bytePrice;
#endif
};


/* parsed agent advertisement message; parsing function: handle_icmp_adv() */
struct adv_extensions {
	char *start;
	int len;

#ifdef DYN_TARGET_LINUX
	struct sockaddr_ll from;
#else
	struct sockaddr_in from;
	struct ethhdr *eth;
#endif
	struct iphdr *ip;
	struct router_adv *radv;
	struct agent_adv_ext *ext;
	struct prefix_len_ext *prefix;
	struct agent_adv_dynamics *own_ext;
	struct msg_key *pubkey_hash;
	struct fa_nai_ext *fa_nai;
	struct challenge_ext *challenge;

	int coaddrs; /* number of care-of addresses in adv. extension */
};

void set_agent_adv_data(__u16 _max_lifetime, struct in_addr _highest_fa_addr,
			struct in_addr _agent_own_addr, __u16 _agent_adv_opt,
			__u8 _own_agent_adv_opt, __u16 _adv_lifetime,
			unsigned char *hfa_pubkey_hash,
			int hfa_pubkey_hash_len);
void set_agent_adv_nai(struct fa_nai_ext *nai_ext);
void set_agent_adv_challenge(struct challenge_ext *challenge);

#ifdef INCLUDE_IPAY
void set_agent_adv_ipay(__u32 timePrice, __u32 bytePrice);
#endif

int open_agent_icmp_socket(char *dev, __u32 filter);
enum { AGENTADV_FILTER_NONE, AGENTADV_FILTER_ADV, AGENTADV_FILTER_SOL,
	UDP_FILTER_PORT434 };
int open_agent_icmp_adv_socket(char *dev, int filter);
int send_agent_solicitation(int s);
#ifdef DYN_TARGET_LINUX
int send_agent_advertisement(int s, struct sockaddr *dest,
			     struct in_addr *destaddr, int ifindex);
int check_icmp_sol(int s, struct sockaddr_ll *from, struct in_addr *dstaddr,
		   struct in_addr *srcaddr);
int handle_icmp_sol(int s);
#endif /* DYN_TARGET_LINUX */
int handle_icmp_adv(int s, char *msg, int maxlen, struct adv_extensions *ext);

#endif