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2897e6fd5f
mrouted-3.5n. This is being splatted onto the head rather than properly imported thanks to the ``delete trailing whitespace'' screw. This code is now actively working in an operational environment (the DARTNET) so I have some confidence that the basic functionality actually works. Obtained from: Bill Fenner, PARC, and ISI
224 lines
5.0 KiB
C
224 lines
5.0 KiB
C
/*
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* The mrouted program is covered by the license in the accompanying file
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* named "LICENSE". Use of the mrouted program represents acceptance of
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* the terms and conditions listed in that file.
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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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*
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* $Id: kern.c,v 3.5 1995/05/09 01:00:39 fenner Exp $
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*/
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#include "defs.h"
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void k_set_rcvbuf(bufsize)
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int bufsize;
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{
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if (setsockopt(igmp_socket, SOL_SOCKET, SO_RCVBUF,
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(char *)&bufsize, sizeof(bufsize)) < 0)
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log(LOG_ERR, errno, "setsockopt SO_RCVBUF %u", bufsize);
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}
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void k_hdr_include(bool)
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int bool;
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{
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#ifdef IP_HDRINCL
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if (setsockopt(igmp_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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void k_set_ttl(t)
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int t;
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{
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u_char ttl;
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ttl = t;
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if (setsockopt(igmp_socket, IPPROTO_IP, IP_MULTICAST_TTL,
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(char *)&ttl, sizeof(ttl)) < 0)
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log(LOG_ERR, errno, "setsockopt IP_MULTICAST_TTL %u", ttl);
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}
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void k_set_loop(l)
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int l;
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{
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u_char loop;
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loop = l;
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if (setsockopt(igmp_socket, IPPROTO_IP, IP_MULTICAST_LOOP,
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(char *)&loop, sizeof(loop)) < 0)
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log(LOG_ERR, errno, "setsockopt IP_MULTICAST_LOOP %u", loop);
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}
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void k_set_if(ifa)
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u_int32 ifa;
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{
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struct in_addr adr;
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adr.s_addr = ifa;
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if (setsockopt(igmp_socket, IPPROTO_IP, IP_MULTICAST_IF,
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(char *)&adr, sizeof(adr)) < 0)
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log(LOG_ERR, errno, "setsockopt IP_MULTICAST_IF %s",
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inet_fmt(ifa, s1));
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}
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void k_join(grp, ifa)
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u_int32 grp;
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u_int32 ifa;
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{
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struct ip_mreq mreq;
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mreq.imr_multiaddr.s_addr = grp;
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mreq.imr_interface.s_addr = ifa;
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if (setsockopt(igmp_socket, IPPROTO_IP, IP_ADD_MEMBERSHIP,
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(char *)&mreq, sizeof(mreq)) < 0)
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log(LOG_WARNING, errno, "can't join group %s on interface %s",
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inet_fmt(grp, s1), inet_fmt(ifa, s2));
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}
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void k_leave(grp, ifa)
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u_int32 grp;
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u_int32 ifa;
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{
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struct ip_mreq mreq;
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mreq.imr_multiaddr.s_addr = grp;
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mreq.imr_interface.s_addr = ifa;
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if (setsockopt(igmp_socket, IPPROTO_IP, IP_DROP_MEMBERSHIP,
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(char *)&mreq, sizeof(mreq)) < 0)
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log(LOG_WARNING, errno, "can't leave group %s on interface %s",
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inet_fmt(grp, s1), inet_fmt(ifa, s2));
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}
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void k_init_dvmrp()
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{
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#ifdef OLD_KERNEL
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if (setsockopt(igmp_socket, IPPROTO_IP, MRT_INIT,
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(char *)NULL, 0) < 0)
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#else
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int v=1;
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if (setsockopt(igmp_socket, IPPROTO_IP, MRT_INIT,
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(char *)&v, sizeof(int)) < 0)
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#endif
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log(LOG_ERR, errno, "can't enable Multicast routing in kernel");
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}
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void k_stop_dvmrp()
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{
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if (setsockopt(igmp_socket, IPPROTO_IP, MRT_DONE,
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(char *)NULL, 0) < 0)
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log(LOG_WARNING, errno, "can't disable Multicast routing in kernel");
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}
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void k_add_vif(vifi, v)
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vifi_t vifi;
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struct uvif *v;
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{
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struct vifctl vc;
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vc.vifc_vifi = vifi;
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vc.vifc_flags = v->uv_flags & VIFF_KERNEL_FLAGS;
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vc.vifc_threshold = v->uv_threshold;
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vc.vifc_rate_limit = v->uv_rate_limit;
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vc.vifc_lcl_addr.s_addr = v->uv_lcl_addr;
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vc.vifc_rmt_addr.s_addr = v->uv_rmt_addr;
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if (setsockopt(igmp_socket, IPPROTO_IP, MRT_ADD_VIF,
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(char *)&vc, sizeof(vc)) < 0)
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log(LOG_ERR, errno, "setsockopt MRT_ADD_VIF");
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}
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void k_del_vif(vifi)
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vifi_t vifi;
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{
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if (setsockopt(igmp_socket, IPPROTO_IP, MRT_DEL_VIF,
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(char *)&vifi, sizeof(vifi)) < 0)
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log(LOG_ERR, errno, "setsockopt MRT_DEL_VIF");
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}
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/*
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* Adds a (source, mcastgrp) entry to the kernel
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*/
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void k_add_rg(origin, g)
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u_long origin;
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struct gtable *g;
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{
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struct mfcctl mc;
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int i;
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/* copy table values so that setsockopt can process it */
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mc.mfcc_origin.s_addr = origin;
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#ifdef OLD_KERNEL
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mc.mfcc_originmask.s_addr = 0xffffffff;
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#endif
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mc.mfcc_mcastgrp.s_addr = g->gt_mcastgrp;
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mc.mfcc_parent = g->gt_route ? g->gt_route->rt_parent : NO_VIF;
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for (i = 0; i < numvifs; i++)
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mc.mfcc_ttls[i] = g->gt_ttls[i];
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/* write to kernel space */
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if (setsockopt(igmp_socket, IPPROTO_IP, MRT_ADD_MFC,
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(char *)&mc, sizeof(mc)) < 0)
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log(LOG_WARNING, errno, "setsockopt MRT_ADD_MFC");
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}
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/*
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* Deletes a (source, mcastgrp) entry from the kernel
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*/
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int k_del_rg(origin, g)
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u_long origin;
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struct gtable *g;
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{
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struct mfcctl mc;
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int retval, i;
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/* copy table values so that setsockopt can process it */
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mc.mfcc_origin.s_addr = origin;
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#ifdef OLD_KERNEL
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mc.mfcc_originmask.s_addr = 0xffffffff;
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#endif
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mc.mfcc_mcastgrp.s_addr = g->gt_mcastgrp;
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/* write to kernel space */
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if ((retval = setsockopt(igmp_socket, IPPROTO_IP, MRT_DEL_MFC,
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(char *)&mc, sizeof(mc))) < 0)
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log(LOG_WARNING, errno, "setsockopt MRT_DEL_MFC");
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return retval;
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}
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/*
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* Get the kernel's idea of what version of mrouted needs to run with it.
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*/
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int k_get_version()
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{
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int vers;
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int len = sizeof(vers);
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if (getsockopt(igmp_socket, IPPROTO_IP, MRT_VERSION,
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(char *)&vers, &len) < 0)
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log(LOG_ERR, errno,
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"getsockopt MRT_VERSION: perhaps your kernel is too old");
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return vers;
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}
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