inet6.c

OLSR Implementation for XORP

/*
 * Copyright (c) 2004 Ying Ge, Communication Research Center Canada.
 *
 * Copyright (c) 2002, 2003 Maoyu Wang, Communication Research Center Canada.
 *
 * By Ying Ge:
 * 1. Change the OLSR packet format and message processing procedure based 
 *    on the OLSR RFC.
 * 2. Add support of multiple interfaces to OLSR, including MID message 
 *    creating and processing procedure as specified in the OLSR RFC.
 * 3. Add QoS Support to OLSR
 *
 * By Maoyu Wang:
 * 1. Ported OLSR from IPv4 to IPv6.
 * 2. Added the Host and Network Association (HNA) functionality into OLSR.
 * 3. Added the default gateway functionality into OLSR by extending the HNA 
 *    message usage. The default gateway functionality supported the mobility
 *	  by cooperating with Mobile IPv6 for a mobile node as well as supported 
 * 	  Internet access for MANET nodes. 
 *
 * DISTRIBUTED WITH NO WARRANTY, EXPRESS OR IMPLIED.
 * See the GNU Library General Public License (file COPYING in the distribution)
 * for conditions of use and redistribution
 */
/*
 * lib/inet6.c        This file contains an implementation of the "INET6"
 *              support functions for the net-tools.
 *              (most of it copied from lib/inet.c 1.26).
 *
 * Version:     $Id: inet6.c,v 1.10 2000/10/28 11:04:00 pb Exp $
 *
 * Author:      Fred N. van Kempen, <[e-mail]>
 *              Copyright 1993 MicroWalt Corporation
 *
 * Modified:
 *960808 {0.01} Frank Strauss :         adapted for IPv6 support
 *980701 {0.02} Arnaldo C. Melo:        GNU gettext instead of catgets
 *990824        Bernd Eckenfels:	clear members for selecting v6 address
 *
 *              This program is free software; you can redistribute it
 *              and/or  modify it under  the terms of  the GNU General
 *              Public  License as  published  by  the  Free  Software
 *              Foundation;  either  version 2 of the License, or  (at
 *              your option) any later version.
 *
 * 2002-April_26 Modified by Maoyu Wang for porting olsr from IPV4 to IPV6
 */
 
#include "config.h"

#ifdef IPV6
#include <asm/types.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <ctype.h>
#include <errno.h>
#include <netdb.h>
#include <resolv.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include "version.h"
#include "net-support.h"
#include "pathnames.h"
#include "intl.h"
#include "util.h"

extern int h_errno;		/* some netdb.h versions don't export this */

static int inet6_resolve(char *name, struct sockaddr_in6 *sin6)
{
    struct addrinfo req, *ai;
    int s;

    memset (&req, '0', sizeof (req));
    req.ai_family = AF_INET6;
    if ((s = getaddrinfo(name, NULL, &req, &ai))) {
	fprintf(stderr, "getaddrinfo: %s: %d\n", name, s);
	return -1;
    }
    memcpy(sin6, ai->ai_addr, sizeof(struct sockaddr_in6));

    freeaddrinfo(ai);

    return (0);
}

#ifndef IN6_IS_ADDR_UNSPECIFIED
#define IN6_IS_ADDR_UNSPECIFIED(a) \
        (((__u32 *) (a))[0] == 0 && ((__u32 *) (a))[1] == 0 && \
         ((__u32 *) (a))[2] == 0 && ((__u32 *) (a))[3] == 0)
#endif


static int inet6_rresolve(char *name, struct sockaddr_in6 *sin6, int numeric)
{
    int s;

    /* Grmpf. -FvK */
    if (sin6->sin6_family != AF_INET6) {
#ifdef DEBUG
	fprintf(stderr, _("rresolve: unsupport address family %d !\n"),
		sin6->sin6_family);
#endif
	errno = EAFNOSUPPORT;
	return (-1);
    }
    if (numeric & 0x7FFF) {
	inet_ntop(AF_INET6, &sin6->sin6_addr, name, 80);
	return (0);
    }
    if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
        if (numeric & 0x8000)
	    strcpy(name, "default");
	else
	    strcpy(name, "*");
	return (0);
    }

    if ((s = getnameinfo((struct sockaddr *) sin6, sizeof(struct sockaddr_in6),
			 name, 255 /* !! */ , NULL, 0, 0))) {
	fputs("getnameinfo failed\n", stderr);
	return -1;
    }
    return (0);
}


void inet6_reserror(char *text)
{
    herror(text);
}


/* Display an Internet socket address. */
void inet6_print(struct in6_addr * ptr)
{
    char name[80];

    inet_ntop(AF_INET6, (struct in6_addr *) ptr, name, 80);
    printf
    return;
}


/* Display an Internet socket address. */
/* dirty! struct sockaddr usually doesn't suffer for inet6 addresses, fst. */
char inet6_sprint(struct sockaddr *sap, int numeric)
{
    static char buff[128];

    if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
	return safe_strncpy(buff, _("[NONE SET]"), sizeof(buff));
    if (inet6_rresolve(buff, (struct sockaddr_in6 *) sap, numeric) != 0)
	return safe_strncpy(buff, _("[UNKNOWN]"), sizeof(buff));
    return (buff);
}

/*
int inet6_getsock(char *bufp, struct sockaddr *sap)
{
    struct sockaddr_in6 *sin6;
    
    sin6 = (struct sockaddr_in6 *)sap;
    sin6->sin6_family = AF_INET6;
    sin6->sin6_port = 0;
    if (inet_pton(AF_INET6, bufp, sin6->sin6_addr.s6_addr) <= 0)
	return (-1);
    return 0;			
}*/

int inet6_input(char *bufp, struct sockaddr *sap)
{
    struct sockaddr_in6 *sin6;
    
    sin6 = (struct sockaddr_in6 *)sap;
    sin6->sin6_family = AF_INET6;
    sin6->sin6_port = 0;
    if (inet_pton(AF_INET6, bufp, sin6->sin6_addr.s6_addr) <= 0)
	return (-1);
    return 0;			
}

#endif				/* HAVE_AFINET6 */