0fea3d5165
kernel IPv6 multicast routing support. pim6 dense mode daemon pim6 sparse mode daemon netstat support of IPv6 multicast routing statistics Merging to the current and testing with other existing multicast routers is done by Tatsuya Jinmei <jinmei@kame.net>, who writes and maintainances the base code in KAME distribution. Make world check and kernel build check was also successful.
416 lines
10 KiB
C
416 lines
10 KiB
C
/*
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* Copyright (c) 1998 by the University of Southern California.
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* All rights reserved.
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation in source and binary forms for lawful
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* purposes and without fee is hereby granted, provided
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* that the above copyright notice appear in all copies and that both
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* the copyright notice and this permission notice appear in supporting
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* documentation, and that any documentation, advertising materials,
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* and other materials related to such distribution and use acknowledge
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* that the software was developed by the University of Southern
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* California and/or Information Sciences Institute.
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* The name of the University of Southern California may not
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* be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THE UNIVERSITY OF SOUTHERN CALIFORNIA DOES NOT MAKE ANY REPRESENTATIONS
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* ABOUT THE SUITABILITY OF THIS SOFTWARE FOR ANY PURPOSE. THIS SOFTWARE IS
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* PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND
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* NON-INFRINGEMENT.
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*
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* IN NO EVENT SHALL USC, OR ANY OTHER CONTRIBUTOR BE LIABLE FOR ANY
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* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, WHETHER IN CONTRACT,
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* TORT, OR OTHER FORM OF ACTION, ARISING OUT OF OR IN CONNECTION WITH,
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* THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Other copyrights might apply to parts of this software and are so
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* noted when applicable.
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*/
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/*
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* Questions concerning this software should be directed to
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* Pavlin Ivanov Radoslavov (pavlin@catarina.usc.edu)
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*
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* $Id: kern.c,v 1.1.1.1 1999/08/08 23:30:52 itojun Exp $
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*/
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/*
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* Part of this program has been derived from mrouted.
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* The mrouted program is covered by the license in the accompanying file
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* named "LICENSE.mrouted".
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*
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* The mrouted program is COPYRIGHT 1989 by The Board of Trustees of
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* Leland Stanford Junior University.
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*
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* $FreeBSD$
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*/
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#include "defs.h"
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#ifdef RAW_OUTPUT_IS_RAW
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int curttl = 0;
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#endif
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/*
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* Open/init the multicast routing in the kernel and sets the MRT_ASSERT
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* flag in the kernel.
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*
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*/
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void
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k_init_pim(socket)
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int socket;
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{
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int v = 1;
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if (setsockopt(socket, IPPROTO_IPV6,
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MRT6_INIT, (char *)&v, sizeof(int)) < 0)
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log(LOG_ERR, errno, "cannot enable multicast routing in kernel");
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if(setsockopt(socket, IPPROTO_IPV6,
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MRT6_PIM, (char *)&v, sizeof(int)) < 0)
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log(LOG_ERR, errno, "cannot set ASSERT flag in kernel");
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}
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/*
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* Stops the multicast routing in the kernel and resets the MRT_ASSERT
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* flag in the kernel.
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*/
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void
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k_stop_pim(socket)
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int socket;
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{
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int v = 0;
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if(setsockopt(socket, IPPROTO_IPV6, MRT6_PIM,
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(char *)&v, sizeof(int)) < 0)
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log(LOG_ERR, errno, "cannot reset ASSERT flag in kernel");
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if (setsockopt(socket, IPPROTO_IPV6, MRT6_DONE, (char *)NULL, 0) < 0)
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log(LOG_ERR, errno, "cannot disable multicast routing in kernel");
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}
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/*
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* Set the socket receiving buffer. `bufsize` is the preferred size,
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* `minsize` is the smallest acceptable size.
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*/
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void k_set_rcvbuf(socket, bufsize, minsize)
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int socket;
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int bufsize;
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int minsize;
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{
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int delta = bufsize / 2;
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int iter = 0;
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/*
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* Set the socket buffer. If we can't set it as large as we
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* want, search around to try to find the highest acceptable
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* value. The highest acceptable value being smaller than
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* minsize is a fatal error.
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*/
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if (setsockopt(socket, SOL_SOCKET, SO_RCVBUF,
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(char *)&bufsize, sizeof(bufsize)) < 0) {
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bufsize -= delta;
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while (1) {
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iter++;
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if (delta > 1)
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delta /= 2;
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if (setsockopt(socket, SOL_SOCKET, SO_RCVBUF,
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(char *)&bufsize, sizeof(bufsize)) < 0) {
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bufsize -= delta;
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} else {
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if (delta < 1024)
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break;
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bufsize += delta;
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}
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}
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if (bufsize < minsize) {
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log(LOG_ERR, 0, "OS-allowed buffer size %u < app min %u",
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bufsize, minsize);
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/*NOTREACHED*/
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}
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}
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IF_DEBUG(DEBUG_KERN)
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log(LOG_DEBUG, 0, "Got %d byte buffer size in %d iterations",
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bufsize, iter);
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}
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#if 0 /* there is no HDRINCL option in IPv6 */
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/*
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* Set/reset the IP_HDRINCL option. My guess is we don't need it for raw
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* sockets, but having it here won't hurt. Well, unless you are running
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* an older version of FreeBSD (older than 2.2.2). If the multicast
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* raw packet is bigger than 208 bytes, then IP_HDRINCL triggers a bug
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* in the kernel and "panic". The kernel patch for netinet/ip_raw.c
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* coming with this distribution fixes it.
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*/
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void k_hdr_include(socket, bool)
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int socket;
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int bool;
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{
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#ifdef IP_HDRINCL
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if (setsockopt(socket, IPPROTO_IP, IP_HDRINCL,
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(char *)&bool, sizeof(bool)) < 0)
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log(LOG_ERR, errno, "setsockopt IP_HDRINCL %u", bool);
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#endif
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}
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#endif /* 0 */
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/*
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* Set the default Hop Limit for the multicast packets outgoing from this
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* socket.
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*/
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void k_set_hlim(socket, h)
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int socket;
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int h;
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{
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#ifdef RAW_OUTPUT_IS_RAW
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curttl = h;
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#else
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int hlim = h;
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if (setsockopt(socket, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
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(char *)&hlim, sizeof(hlim)) < 0)
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log(LOG_ERR, errno, "setsockopt IPV6_MULTICAST_HOPS %u", hlim);
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#endif
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}
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/*
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* Set/reset the IPV6_MULTICAST_LOOP. Set/reset is specified by "flag".
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*/
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void k_set_loop(socket, flag)
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int socket;
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int flag;
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{
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u_int loop;
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loop = flag;
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if (setsockopt(socket, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
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(char *)&loop, sizeof(loop)) < 0)
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log(LOG_ERR, errno, "setsockopt IPV6_MULTICAST_LOOP %u", loop);
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}
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/*
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* Set the IPV6_MULTICAST_IF option on local interface which has the
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* specified index.
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*/
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void k_set_if(socket, ifindex)
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int socket;
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u_int ifindex;
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{
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if (setsockopt(socket, IPPROTO_IPV6, IPV6_MULTICAST_IF,
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(char *)&ifindex, sizeof(ifindex)) < 0)
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log(LOG_ERR, errno, "setsockopt IPV6_MULTICAST_IF for %s",
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ifindex2str(ifindex));
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}
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/*
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* Join a multicast grp group on local interface ifa.
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*/
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void k_join(socket, grp, ifindex)
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int socket;
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struct in6_addr *grp;
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u_int ifindex;
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{
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struct ipv6_mreq mreq;
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mreq.ipv6mr_multiaddr = *grp;
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mreq.ipv6mr_interface = ifindex;
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if (setsockopt(socket, IPPROTO_IPV6, IPV6_JOIN_GROUP,
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(char *)&mreq, sizeof(mreq)) < 0)
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log(LOG_WARNING, errno, "cannot join group %s on interface %s",
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inet6_fmt(grp), ifindex2str(ifindex));
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}
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/*
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* Leave a multicats grp group on local interface ifa.
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*/
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void k_leave(socket, grp, ifindex)
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int socket;
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struct in6_addr *grp;
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u_int ifindex;
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{
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struct ipv6_mreq mreq;
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mreq.ipv6mr_multiaddr = *grp;
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mreq.ipv6mr_interface = ifindex;
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if (setsockopt(socket, IPPROTO_IPV6, IPV6_LEAVE_GROUP,
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(char *)&mreq, sizeof(mreq)) < 0)
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log(LOG_WARNING, errno, "cannot leave group %s on interface %s",
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inet6_fmt(grp), ifindex2str(ifindex));
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}
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/*
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* Add a virtual interface in the kernel.
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*/
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void k_add_vif(socket, vifi, v)
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int socket;
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vifi_t vifi;
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struct uvif *v;
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{
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struct mif6ctl mc;
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mc.mif6c_mifi = vifi;
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/* TODO: only for DVMRP tunnels?
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mc.mif6c_flags = v->uv_flags & VIFF_KERNEL_FLAGS;
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*/
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mc.mif6c_flags = v->uv_flags;
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#ifdef notyet
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mc.mif6c_rate_limit = v->uv_rate_limit;
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#endif
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mc.mif6c_pifi = v->uv_ifindex;
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if (setsockopt(socket, IPPROTO_IPV6, MRT6_ADD_MIF,
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(char *)&mc, sizeof(mc)) < 0)
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log(LOG_ERR, errno, "setsockopt MRT6_ADD_MIF on mif %d", vifi);
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}
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/*
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* Delete a virtual interface in the kernel.
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*/
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void k_del_vif(socket, vifi)
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int socket;
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vifi_t vifi;
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{
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if (setsockopt(socket, IPPROTO_IPV6, MRT6_DEL_MIF,
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(char *)&vifi, sizeof(vifi)) < 0)
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log(LOG_ERR, errno, "setsockopt MRT6_DEL_MIF on mif %d", vifi);
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}
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/*
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* Delete all MFC entries for particular routing entry from the kernel.
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*/
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int
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k_del_mfc(socket, source, group)
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int socket;
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struct sockaddr_in6 *source;
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struct sockaddr_in6 *group;
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{
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struct mf6cctl mc;
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mc.mf6cc_origin = *source;
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mc.mf6cc_mcastgrp = *group;
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if (setsockopt(socket, IPPROTO_IPV6, MRT6_DEL_MFC, (char *)&mc,
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sizeof(mc)) < 0) {
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log(LOG_WARNING, errno, "setsockopt MRT6_DEL_MFC");
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return FALSE;
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}
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IF_DEBUG(DEBUG_MFC)
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log(LOG_DEBUG, 0, "Deleted MFC entry: src %s, grp %s",
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inet6_fmt(&source->sin6_addr),
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inet6_fmt(&group->sin6_addr));
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return(TRUE);
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}
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/*
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* Install/modify a MFC entry in the kernel
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*/
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int
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k_chg_mfc(socket, source, group, iif, oifs)
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int socket;
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struct sockaddr_in6 *source;
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struct sockaddr_in6 *group;
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vifi_t iif;
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if_set *oifs;
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{
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struct mf6cctl mc;
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vifi_t vifi;
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mc.mf6cc_origin = *source;
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mc.mf6cc_mcastgrp = *group;
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mc.mf6cc_parent = iif;
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IF_ZERO(&mc.mf6cc_ifset);
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for (vifi = 0; vifi < numvifs; vifi++) {
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if (IF_ISSET(vifi, oifs))
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IF_SET(vifi, &mc.mf6cc_ifset);
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else
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IF_CLR(vifi, &mc.mf6cc_ifset);
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}
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if (setsockopt(socket, IPPROTO_IPV6, MRT6_ADD_MFC, (char *)&mc,
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sizeof(mc)) < 0) {
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log(LOG_WARNING, errno,
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"setsockopt MRT6_ADD_MFC for source %s and group %s",
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inet6_fmt(&source->sin6_addr), inet6_fmt(&group->sin6_addr));
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return(FALSE);
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}
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return(TRUE);
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}
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/*
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* Get packet counters for particular interface
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*/
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/*
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* XXX: TODO: currently not used, but keep just in case we need it later.
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*/
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int k_get_vif_count(vifi, retval)
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vifi_t vifi;
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struct vif_count *retval;
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{
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struct sioc_mif_req6 mreq;
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mreq.mifi = vifi;
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if (ioctl(udp_socket, SIOCGETMIFCNT_IN6, (char *)&mreq) < 0) {
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log(LOG_WARNING, errno, "SIOCGETMIFCNT_IN6 on vif %d", vifi);
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retval->icount = retval->ocount = retval->ibytes =
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retval->obytes = 0xffffffff;
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return (1);
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}
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retval->icount = mreq.icount;
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retval->ocount = mreq.ocount;
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retval->ibytes = mreq.ibytes;
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retval->obytes = mreq.obytes;
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return (0);
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}
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/*
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* Gets the number of packets, bytes, and number of packets arrived
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* on wrong if in the kernel for particular (S,G) entry.
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*/
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int
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k_get_sg_cnt(socket, source, group, retval)
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int socket; /* udp_socket */
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struct sockaddr_in6 *source;
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struct sockaddr_in6 *group;
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struct sg_count *retval;
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{
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struct sioc_sg_req6 sgreq;
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sgreq.src = *source;
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sgreq.grp = *group;
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if (ioctl(socket, SIOCGETSGCNT_IN6, (char *)&sgreq) < 0) {
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log(LOG_WARNING, errno, "SIOCGETSGCNT_IN6 on (%s %s)",
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inet6_fmt(&source->sin6_addr), inet6_fmt(&group->sin6_addr));
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retval->pktcnt = retval->bytecnt = retval->wrong_if = ~0; /* XXX */
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return(1);
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}
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retval->pktcnt = sgreq.pktcnt;
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retval->bytecnt = sgreq.bytecnt;
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retval->wrong_if = sgreq.wrong_if;
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return(0);
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}
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