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
12 * $FreeBSD: src/usr.sbin/mrouted/kern.c,v 1.12 1999/08/28 01:17:04 peter Exp $
13 * $DragonFly: src/usr.sbin/mrouted/kern.c,v 1.4 2004/12/16 03:39:05 dillon Exp $
21 k_set_rcvbuf(int bufsize, int minsize)
23 int delta = bufsize / 2;
27 * Set the socket buffer. If we can't set it as large as we
28 * want, search around to try to find the highest acceptable
29 * value. The highest acceptable value being smaller than
30 * minsize is a fatal error.
32 if (setsockopt(igmp_socket, SOL_SOCKET, SO_RCVBUF,
33 (char *)&bufsize, sizeof(bufsize)) < 0) {
40 if (setsockopt(igmp_socket, SOL_SOCKET, SO_RCVBUF,
41 (char *)&bufsize, sizeof(bufsize)) < 0) {
49 if (bufsize < minsize) {
50 dolog(LOG_ERR, 0, "OS-allowed buffer size %u < app min %u",
56 dolog(LOG_DEBUG, 0, "Got %d byte buffer size in %d iterations",
61 k_hdr_include(int boolv)
64 if (setsockopt(igmp_socket, IPPROTO_IP, IP_HDRINCL,
65 (char *)&boolv, sizeof(boolv)) < 0)
66 dolog(LOG_ERR, errno, "setsockopt IP_HDRINCL %u", boolv);
73 #ifndef RAW_OUTPUT_IS_RAW
77 if (setsockopt(igmp_socket, IPPROTO_IP, IP_MULTICAST_TTL,
78 (char *)&ttl, sizeof(ttl)) < 0)
79 dolog(LOG_ERR, errno, "setsockopt IP_MULTICAST_TTL %u", ttl);
90 if (setsockopt(igmp_socket, IPPROTO_IP, IP_MULTICAST_LOOP,
91 (char *)&loop, sizeof(loop)) < 0)
92 dolog(LOG_ERR, errno, "setsockopt IP_MULTICAST_LOOP %u", loop);
101 if (setsockopt(igmp_socket, IPPROTO_IP, IP_MULTICAST_IF,
102 (char *)&adr, sizeof(adr)) < 0)
103 dolog(LOG_ERR, errno, "setsockopt IP_MULTICAST_IF %s",
108 k_join(u_int32 grp, u_int32 ifa)
112 mreq.imr_multiaddr.s_addr = grp;
113 mreq.imr_interface.s_addr = ifa;
115 if (setsockopt(igmp_socket, IPPROTO_IP, IP_ADD_MEMBERSHIP,
116 (char *)&mreq, sizeof(mreq)) < 0)
117 dolog(LOG_WARNING, errno, "can't join group %s on interface %s",
118 inet_fmt(grp, s1), inet_fmt(ifa, s2));
122 k_leave(u_int32 grp, u_int32 ifa)
126 mreq.imr_multiaddr.s_addr = grp;
127 mreq.imr_interface.s_addr = ifa;
129 if (setsockopt(igmp_socket, IPPROTO_IP, IP_DROP_MEMBERSHIP,
130 (char *)&mreq, sizeof(mreq)) < 0)
131 dolog(LOG_WARNING, errno, "can't leave group %s on interface %s",
132 inet_fmt(grp, s1), inet_fmt(ifa, s2));
139 if (setsockopt(igmp_socket, IPPROTO_IP, MRT_INIT,
144 if (setsockopt(igmp_socket, IPPROTO_IP, MRT_INIT,
145 (char *)&v, sizeof(int)) < 0)
147 dolog(LOG_ERR, errno, "can't enable Multicast routing in kernel");
153 if (setsockopt(igmp_socket, IPPROTO_IP, MRT_DONE,
155 dolog(LOG_WARNING, errno, "can't disable Multicast routing in kernel");
159 k_add_vif(vifi_t vifi, struct uvif *v)
164 vc.vifc_flags = v->uv_flags & VIFF_KERNEL_FLAGS;
165 vc.vifc_threshold = v->uv_threshold;
166 vc.vifc_rate_limit = v->uv_rate_limit;
167 vc.vifc_lcl_addr.s_addr = v->uv_lcl_addr;
168 vc.vifc_rmt_addr.s_addr = v->uv_rmt_addr;
170 if (setsockopt(igmp_socket, IPPROTO_IP, MRT_ADD_VIF,
171 (char *)&vc, sizeof(vc)) < 0)
172 dolog(LOG_ERR, errno, "setsockopt MRT_ADD_VIF on vif %d", vifi);
176 k_del_vif(vifi_t vifi)
179 if (setsockopt(igmp_socket, IPPROTO_IP, MRT_DEL_VIF,
180 (char *)&vifi, sizeof(vifi)) < 0)
181 dolog(LOG_ERR, errno, "setsockopt MRT_DEL_VIF on vif %d", vifi);
185 * Adds a (source, mcastgrp) entry to the kernel
188 k_add_rg(u_int32 origin, struct gtable *g)
194 md_log(MD_ADD, origin, g->gt_mcastgrp);
196 /* copy table values so that setsockopt can process it */
197 mc.mfcc_origin.s_addr = origin;
199 mc.mfcc_originmask.s_addr = 0xffffffff;
201 mc.mfcc_mcastgrp.s_addr = g->gt_mcastgrp;
202 mc.mfcc_parent = g->gt_route ? g->gt_route->rt_parent : NO_VIF;
203 for (i = 0; i < numvifs; i++)
204 mc.mfcc_ttls[i] = g->gt_ttls[i];
206 /* write to kernel space */
207 if (setsockopt(igmp_socket, IPPROTO_IP, MRT_ADD_MFC,
208 (char *)&mc, sizeof(mc)) < 0) {
210 md_log(MD_ADD_FAIL, origin, g->gt_mcastgrp);
212 dolog(LOG_WARNING, errno, "setsockopt MRT_ADD_MFC");
218 * Deletes a (source, mcastgrp) entry from the kernel
221 k_del_rg(u_int32 origin, struct gtable *g)
227 md_log(MD_DEL, origin, g->gt_mcastgrp);
229 /* copy table values so that setsockopt can process it */
230 mc.mfcc_origin.s_addr = origin;
232 mc.mfcc_originmask.s_addr = 0xffffffff;
234 mc.mfcc_mcastgrp.s_addr = g->gt_mcastgrp;
236 /* write to kernel space */
237 if ((retval = setsockopt(igmp_socket, IPPROTO_IP, MRT_DEL_MFC,
238 (char *)&mc, sizeof(mc))) < 0) {
240 md_log(MD_DEL_FAIL, origin, g->gt_mcastgrp);
242 dolog(LOG_WARNING, errno, "setsockopt MRT_DEL_MFC of (%s %s)",
243 inet_fmt(origin, s1), inet_fmt(g->gt_mcastgrp, s2));
250 * Get the kernel's idea of what version of mrouted needs to run with it.
259 int len = sizeof(vers);
261 if (getsockopt(igmp_socket, IPPROTO_IP, MRT_VERSION,
262 (char *)&vers, &len) < 0)
263 dolog(LOG_ERR, errno,
264 "getsockopt MRT_VERSION: perhaps your kernel is too old");