2 * The mrouted program is covered by the license in the accompanying file
3 * named "LICENSE". Use of the mrouted program represents acceptance of
4 * the terms and conditions listed in that file.
6 * The mrouted program is COPYRIGHT 1989 by The Board of Trustees of
7 * Leland Stanford Junior University.
10 * kern.c,v 3.8.4.10 1998/01/06 02:00:51 fenner Exp
14 static const char rcsid[] =
15 "$FreeBSD: src/usr.sbin/mrouted/kern.c,v 1.12 1999/08/28 01:17:04 peter Exp $";
22 void k_set_rcvbuf(bufsize, minsize)
26 int delta = bufsize / 2;
30 * Set the socket buffer. If we can't set it as large as we
31 * want, search around to try to find the highest acceptable
32 * value. The highest acceptable value being smaller than
33 * minsize is a fatal error.
35 if (setsockopt(igmp_socket, SOL_SOCKET, SO_RCVBUF,
36 (char *)&bufsize, sizeof(bufsize)) < 0) {
43 if (setsockopt(igmp_socket, SOL_SOCKET, SO_RCVBUF,
44 (char *)&bufsize, sizeof(bufsize)) < 0) {
52 if (bufsize < minsize) {
53 log(LOG_ERR, 0, "OS-allowed buffer size %u < app min %u",
59 log(LOG_DEBUG, 0, "Got %d byte buffer size in %d iterations",
64 void k_hdr_include(bool)
68 if (setsockopt(igmp_socket, IPPROTO_IP, IP_HDRINCL,
69 (char *)&bool, sizeof(bool)) < 0)
70 log(LOG_ERR, errno, "setsockopt IP_HDRINCL %u", bool);
78 #ifndef RAW_OUTPUT_IS_RAW
82 if (setsockopt(igmp_socket, IPPROTO_IP, IP_MULTICAST_TTL,
83 (char *)&ttl, sizeof(ttl)) < 0)
84 log(LOG_ERR, errno, "setsockopt IP_MULTICAST_TTL %u", ttl);
96 if (setsockopt(igmp_socket, IPPROTO_IP, IP_MULTICAST_LOOP,
97 (char *)&loop, sizeof(loop)) < 0)
98 log(LOG_ERR, errno, "setsockopt IP_MULTICAST_LOOP %u", loop);
108 if (setsockopt(igmp_socket, IPPROTO_IP, IP_MULTICAST_IF,
109 (char *)&adr, sizeof(adr)) < 0)
110 log(LOG_ERR, errno, "setsockopt IP_MULTICAST_IF %s",
115 void k_join(grp, ifa)
121 mreq.imr_multiaddr.s_addr = grp;
122 mreq.imr_interface.s_addr = ifa;
124 if (setsockopt(igmp_socket, IPPROTO_IP, IP_ADD_MEMBERSHIP,
125 (char *)&mreq, sizeof(mreq)) < 0)
126 log(LOG_WARNING, errno, "can't join group %s on interface %s",
127 inet_fmt(grp, s1), inet_fmt(ifa, s2));
131 void k_leave(grp, ifa)
137 mreq.imr_multiaddr.s_addr = grp;
138 mreq.imr_interface.s_addr = ifa;
140 if (setsockopt(igmp_socket, IPPROTO_IP, IP_DROP_MEMBERSHIP,
141 (char *)&mreq, sizeof(mreq)) < 0)
142 log(LOG_WARNING, errno, "can't leave group %s on interface %s",
143 inet_fmt(grp, s1), inet_fmt(ifa, s2));
150 if (setsockopt(igmp_socket, IPPROTO_IP, MRT_INIT,
151 (char *)NULL, 0) < 0)
155 if (setsockopt(igmp_socket, IPPROTO_IP, MRT_INIT,
156 (char *)&v, sizeof(int)) < 0)
158 log(LOG_ERR, errno, "can't enable Multicast routing in kernel");
164 if (setsockopt(igmp_socket, IPPROTO_IP, MRT_DONE,
165 (char *)NULL, 0) < 0)
166 log(LOG_WARNING, errno, "can't disable Multicast routing in kernel");
170 void k_add_vif(vifi, v)
177 vc.vifc_flags = v->uv_flags & VIFF_KERNEL_FLAGS;
178 vc.vifc_threshold = v->uv_threshold;
179 vc.vifc_rate_limit = v->uv_rate_limit;
180 vc.vifc_lcl_addr.s_addr = v->uv_lcl_addr;
181 vc.vifc_rmt_addr.s_addr = v->uv_rmt_addr;
183 if (setsockopt(igmp_socket, IPPROTO_IP, MRT_ADD_VIF,
184 (char *)&vc, sizeof(vc)) < 0)
185 log(LOG_ERR, errno, "setsockopt MRT_ADD_VIF on vif %d", vifi);
192 if (setsockopt(igmp_socket, IPPROTO_IP, MRT_DEL_VIF,
193 (char *)&vifi, sizeof(vifi)) < 0)
194 log(LOG_ERR, errno, "setsockopt MRT_DEL_VIF on vif %d", vifi);
199 * Adds a (source, mcastgrp) entry to the kernel
201 void k_add_rg(origin, g)
209 md_log(MD_ADD, origin, g->gt_mcastgrp);
211 /* copy table values so that setsockopt can process it */
212 mc.mfcc_origin.s_addr = origin;
214 mc.mfcc_originmask.s_addr = 0xffffffff;
216 mc.mfcc_mcastgrp.s_addr = g->gt_mcastgrp;
217 mc.mfcc_parent = g->gt_route ? g->gt_route->rt_parent : NO_VIF;
218 for (i = 0; i < numvifs; i++)
219 mc.mfcc_ttls[i] = g->gt_ttls[i];
221 /* write to kernel space */
222 if (setsockopt(igmp_socket, IPPROTO_IP, MRT_ADD_MFC,
223 (char *)&mc, sizeof(mc)) < 0) {
225 md_log(MD_ADD_FAIL, origin, g->gt_mcastgrp);
227 log(LOG_WARNING, errno, "setsockopt MRT_ADD_MFC",
228 inet_fmt(origin, s1), inet_fmt(g->gt_mcastgrp, s2));
234 * Deletes a (source, mcastgrp) entry from the kernel
236 int k_del_rg(origin, g)
244 md_log(MD_DEL, origin, g->gt_mcastgrp);
246 /* copy table values so that setsockopt can process it */
247 mc.mfcc_origin.s_addr = origin;
249 mc.mfcc_originmask.s_addr = 0xffffffff;
251 mc.mfcc_mcastgrp.s_addr = g->gt_mcastgrp;
253 /* write to kernel space */
254 if ((retval = setsockopt(igmp_socket, IPPROTO_IP, MRT_DEL_MFC,
255 (char *)&mc, sizeof(mc))) < 0) {
257 md_log(MD_DEL_FAIL, origin, g->gt_mcastgrp);
259 log(LOG_WARNING, errno, "setsockopt MRT_DEL_MFC of (%s %s)",
260 inet_fmt(origin, s1), inet_fmt(g->gt_mcastgrp, s2));
267 * Get the kernel's idea of what version of mrouted needs to run with it.
275 int len = sizeof(vers);
277 if (getsockopt(igmp_socket, IPPROTO_IP, MRT_VERSION,
278 (char *)&vers, &len) < 0)
280 "getsockopt MRT_VERSION: perhaps your kernel is too old");
288 * Get packet counters
291 k_get_vif_count(vifi, icount, ocount, ibytes, obytes)
293 int *icount, *ocount, *ibytes, *obytes;
295 struct sioc_vif_req vreq;
299 if (ioctl(udp_socket, SIOCGETVIFCNT, (char *)&vreq) < 0) {
300 log(LOG_WARNING, errno, "SIOCGETVIFCNT on vif %d", vifi);
301 vreq.icount = vreq.ocount = vreq.ibytes =
302 vreq.obytes = 0xffffffff;
306 *icount = vreq.icount;
308 *ocount = vreq.ocount;
310 *ibytes = vreq.ibytes;
312 *obytes = vreq.obytes;
317 * Get counters for a desired source and group.
320 k_get_sg_count(src, grp, pktcnt, bytecnt, wrong_if)
323 struct sg_count *retval;
325 struct sioc_sg_req sgreq;
328 sgreq.src.s_addr = src;
329 sgreq.grp.s_addr = grp;
330 if (ioctl(udp_socket, SIOCGETSGCNT, (char *)&sgreq) < 0) {
331 log(LOG_WARNING, errno, "SIOCGETSGCNT on (%s %s)",
332 inet_fmt(src, s1), inet_fmt(grp, s2));
333 sgreq.pktcnt = sgreq.bytecnt = sgreq.wrong_if = 0xffffffff;
337 *pktcnt = sgreq.pktcnt;
339 *bytecnt = sgreq.bytecnt;
341 *wrong_if = sgreq.wrong_if;