agent_utils.h

mobile ip 在linux下的一种实现

/* $Id: agent_utils.h,v 1.11 2001/08/05 21:54:26 jm Exp $
 * Independent help routines for FA and HA
 *
 * 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 AGENT_UTILS_H
#define AGENT_UTILS_H

#include <time.h>
#include <sys/time.h>

#include "message.h"

struct msg_key *dynamics_do_rsa_encrypt(unsigned char const *sk, int sk_len,
					const struct msg_key *pubkey);
int dynamics_check_sendto(int ret, int len, char *error);
int dynamics_open_udp_socket(int socket_priority, struct in_addr addr,
			     short int port, char *dev);


/* IP_PKTINFO related definitions are not available in all the libc versions
 * in appropriate form - define them here */

#ifndef CMSG_ALIGN
#define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
#endif
#ifndef CMSG_DATA
#define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + \
	CMSG_ALIGN(sizeof(struct cmsghdr))))
#endif

#define DYNAMICS_CMSG_NXTHDR(mhdr, cmsg) dynamics_cmsg_nxthdr((mhdr), (cmsg))
struct cmsghdr * dynamics_cmsg_nxthdr(struct msghdr *__msg,
				      struct cmsghdr *__cmsg);

#ifndef IP_PKTINFO
#define IP_PKTINFO 8
#endif

struct _in_pktinfo {
	unsigned int   ipi_ifindex;  /* Interface index */
	struct in_addr ipi_spec_dst; /* Routing destination address */
	struct in_addr ipi_addr;     /* Header Destination address */
};

#ifndef IP_RCVERR
#define IP_RCVERR 11
#endif

/* struct sock_extended_err is available only in kernel headers, so here is a
 * local copy of the structure */
struct dynamics_sock_extended_err
{
	__u32   ee_errno;       
	__u8    ee_origin;
	__u8    ee_type;
	__u8    ee_code;
	__u8    ee_pad;
	__u32   ee_info;
	__u32   ee_data;
};

#ifndef SO_EE_OFFENDER
#define SO_EE_OFFENDER(ee) ((struct sockaddr *) ((ee) + 1))
#endif

#endif