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      1 /*
      2  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
      3  * Use is subject to license terms.
      4  */
      5 
      6 /*
      7  * Copyright (c) 1988, 1991, 1993
      8  *	The Regents of the University of California.  All rights reserved.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the University of
     21  *	California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  *
     38  *	@(#)rtsock.c	8.6 (Berkeley) 2/11/95
     39  */
     40 
     41 /*
     42  * This file contains routines that processes routing socket requests.
     43  */
     44 
     45 #include <sys/types.h>
     46 #include <sys/stream.h>
     47 #include <sys/stropts.h>
     48 #include <sys/strlog.h>
     49 #include <sys/dlpi.h>
     50 #include <sys/ddi.h>
     51 #include <sys/cmn_err.h>
     52 #include <sys/debug.h>
     53 
     54 #include <sys/systm.h>
     55 #include <sys/param.h>
     56 #include <sys/socket.h>
     57 #define	_SUN_TPI_VERSION	2
     58 #include <sys/tihdr.h>
     59 #include <net/if.h>
     60 #include <net/route.h>
     61 #include <netinet/in.h>
     62 #include <net/if_dl.h>
     63 #include <netinet/ip6.h>
     64 
     65 #include <inet/common.h>
     66 #include <inet/mi.h>
     67 #include <inet/ip.h>
     68 #include <inet/ip6.h>
     69 #include <inet/ip_if.h>
     70 #include <inet/ip_ire.h>
     71 #include <inet/ip_rts.h>
     72 #include <inet/ip_multi.h>
     73 #include <sys/tsol/tndb.h>
     74 #include <sys/tsol/tnet.h>
     75 
     76 /*
     77  * Fills the message with the given info.
     78  */
     79 void
     80 rts_fill_msg_v6(int type, int rtm_addrs, const in6_addr_t *dst,
     81     const in6_addr_t *mask, const in6_addr_t *gateway,
     82     const in6_addr_t *src_addr, const in6_addr_t *brd_addr,
     83     const in6_addr_t *author, const in6_addr_t *ifaddr, const ill_t *ill,
     84     mblk_t *mp, const tsol_gc_t *gc)
     85 {
     86 	rt_msghdr_t	*rtm;
     87 	sin6_t		*sin6;
     88 	size_t		data_size, header_size;
     89 	uchar_t		*cp;
     90 	int		i;
     91 
     92 	ASSERT(mp != NULL);
     93 	/*
     94 	 * First find the type of the message
     95 	 * and its length.
     96 	 */
     97 	header_size = rts_header_msg_size(type);
     98 	/*
     99 	 * Now find the size of the data
    100 	 * that follows the message header.
    101 	 */
    102 	data_size = rts_data_msg_size(rtm_addrs, AF_INET6, gc != NULL ? 1 : 0);
    103 
    104 	rtm = (rt_msghdr_t *)mp->b_rptr;
    105 	mp->b_wptr = &mp->b_rptr[header_size];
    106 	cp = mp->b_wptr;
    107 	bzero(cp, data_size);
    108 	for (i = 0; i < RTA_NUMBITS; i++) {
    109 		sin6 = (sin6_t *)cp;
    110 		switch (rtm_addrs & (1 << i)) {
    111 		case RTA_DST:
    112 			sin6->sin6_addr = *dst;
    113 			sin6->sin6_family = AF_INET6;
    114 			cp += sizeof (sin6_t);
    115 			break;
    116 		case RTA_GATEWAY:
    117 			sin6->sin6_addr = *gateway;
    118 			sin6->sin6_family = AF_INET6;
    119 			cp += sizeof (sin6_t);
    120 			break;
    121 		case RTA_NETMASK:
    122 			sin6->sin6_addr = *mask;
    123 			sin6->sin6_family = AF_INET6;
    124 			cp += sizeof (sin6_t);
    125 			break;
    126 		case RTA_IFA:
    127 			sin6->sin6_addr = *ifaddr;
    128 			sin6->sin6_family = AF_INET6;
    129 			cp += sizeof (sin6_t);
    130 			break;
    131 		case RTA_SRC:
    132 			sin6->sin6_addr = *src_addr;
    133 			sin6->sin6_family = AF_INET6;
    134 			cp += sizeof (sin6_t);
    135 			break;
    136 		case RTA_IFP:
    137 			cp += ill_dls_info((struct sockaddr_dl *)cp, ill);
    138 			break;
    139 		case RTA_AUTHOR:
    140 			sin6->sin6_addr = *author;
    141 			sin6->sin6_family = AF_INET6;
    142 			cp += sizeof (sin6_t);
    143 			break;
    144 		case RTA_BRD:
    145 			/*
    146 			 * RTA_BRD is used typically to specify a point-to-point
    147 			 * destination address.
    148 			 */
    149 			sin6->sin6_addr = *brd_addr;
    150 			sin6->sin6_family = AF_INET6;
    151 			cp += sizeof (sin6_t);
    152 			break;
    153 		}
    154 	}
    155 
    156 	if (gc != NULL) {
    157 		rtm_ext_t *rtm_ext;
    158 		struct rtsa_s *rp_dst;
    159 		tsol_rtsecattr_t *rsap;
    160 
    161 		ASSERT(gc->gc_grp != NULL);
    162 		ASSERT(RW_LOCK_HELD(&gc->gc_grp->gcgrp_rwlock));
    163 
    164 		rtm_ext = (rtm_ext_t *)cp;
    165 		rtm_ext->rtmex_type = RTMEX_GATEWAY_SECATTR;
    166 		rtm_ext->rtmex_len = TSOL_RTSECATTR_SIZE(1);
    167 
    168 		rsap = (tsol_rtsecattr_t *)(rtm_ext + 1);
    169 		rsap->rtsa_cnt = 1;
    170 		rp_dst = rsap->rtsa_attr;
    171 
    172 		ASSERT(gc->gc_db != NULL);
    173 		bcopy(&gc->gc_db->gcdb_attr, rp_dst, sizeof (*rp_dst));
    174 		cp = (uchar_t *)rp_dst;
    175 	}
    176 
    177 	mp->b_wptr = cp;
    178 	mp->b_cont = NULL;
    179 	/*
    180 	 * set the fields that are common to
    181 	 * to different messages.
    182 	 */
    183 	rtm->rtm_msglen = (short)(header_size + data_size);
    184 	rtm->rtm_version = RTM_VERSION;
    185 	rtm->rtm_type = (uchar_t)type;
    186 }
    187 
    188 /*
    189  * This routine is called to generate a message to the routing
    190  * socket indicating that a redirect has occured, a routing lookup
    191  * has failed, or that a protocol has detected timeouts to a particular
    192  * destination. This routine is called for message types RTM_LOSING,
    193  * RTM_REDIRECT, and RTM_MISS.
    194  */
    195 void
    196 ip_rts_change_v6(int type, const in6_addr_t *dst_addr,
    197     const in6_addr_t *gw_addr, const in6_addr_t *net_mask,
    198     const in6_addr_t *source, const in6_addr_t *author,
    199     int flags, int error, int rtm_addrs, ip_stack_t *ipst)
    200 {
    201 	rt_msghdr_t	*rtm;
    202 	mblk_t		*mp;
    203 
    204 	if (rtm_addrs == 0)
    205 		return;
    206 	mp = rts_alloc_msg(type, rtm_addrs, AF_INET6, 0);
    207 	if (mp == NULL)
    208 		return;
    209 	rts_fill_msg_v6(type, rtm_addrs, dst_addr, net_mask, gw_addr, source,
    210 	    &ipv6_all_zeros, &ipv6_all_zeros, author, NULL, mp, NULL);
    211 	rtm = (rt_msghdr_t *)mp->b_rptr;
    212 	rtm->rtm_flags = flags;
    213 	rtm->rtm_errno = error;
    214 	rtm->rtm_flags |= RTF_DONE;
    215 	rtm->rtm_addrs = rtm_addrs;
    216 	rts_queue_input(mp, NULL, AF_INET6, RTSQ_ALL, ipst);
    217 }
    218