1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
/* $NetBSD: kern.c,v 1.4 1995/12/10 10:07:03 mycroft Exp $ */
/*
* The mrouted program is covered by the license in the accompanying file
* named "LICENSE". Use of the mrouted program represents acceptance of
* the terms and conditions listed in that file.
*
* The mrouted program is COPYRIGHT 1989 by The Board of Trustees of
* Leland Stanford Junior University.
*/
#include "defs.h"
void k_set_rcvbuf(int bufsize)
{
if (setsockopt(igmp_socket, SOL_SOCKET, SO_RCVBUF,
(char *)&bufsize, sizeof(bufsize)) < 0)
log(LOG_ERR, errno, "setsockopt SO_RCVBUF %u", bufsize);
}
void k_hdr_include(int bool)
{
#ifdef IP_HDRINCL
if (setsockopt(igmp_socket, IPPROTO_IP, IP_HDRINCL,
(char *)&bool, sizeof(bool)) < 0)
log(LOG_ERR, errno, "setsockopt IP_HDRINCL %u", bool);
#endif
}
void k_set_ttl(int t)
{
u_char ttl;
ttl = t;
if (setsockopt(igmp_socket, IPPROTO_IP, IP_MULTICAST_TTL,
(char *)&ttl, sizeof(ttl)) < 0)
log(LOG_ERR, errno, "setsockopt IP_MULTICAST_TTL %u", ttl);
}
void k_set_loop(int l)
{
u_char loop;
loop = l;
if (setsockopt(igmp_socket, IPPROTO_IP, IP_MULTICAST_LOOP,
(char *)&loop, sizeof(loop)) < 0)
log(LOG_ERR, errno, "setsockopt IP_MULTICAST_LOOP %u", loop);
}
void k_set_if(u_int32_t ifa)
{
struct in_addr adr;
adr.s_addr = ifa;
if (setsockopt(igmp_socket, IPPROTO_IP, IP_MULTICAST_IF,
(char *)&adr, sizeof(adr)) < 0)
log(LOG_ERR, errno, "setsockopt IP_MULTICAST_IF %s",
inet_fmt(ifa, s1));
}
void k_join(u_int32_t grp, u_int32_t ifa)
{
struct ip_mreq mreq;
mreq.imr_multiaddr.s_addr = grp;
mreq.imr_interface.s_addr = ifa;
if (setsockopt(igmp_socket, IPPROTO_IP, IP_ADD_MEMBERSHIP,
(char *)&mreq, sizeof(mreq)) < 0)
log(LOG_WARNING, errno, "can't join group %s on interface %s",
inet_fmt(grp, s1), inet_fmt(ifa, s2));
}
void k_leave(u_int32_t grp, u_int32_t ifa)
{
struct ip_mreq mreq;
mreq.imr_multiaddr.s_addr = grp;
mreq.imr_interface.s_addr = ifa;
if (setsockopt(igmp_socket, IPPROTO_IP, IP_DROP_MEMBERSHIP,
(char *)&mreq, sizeof(mreq)) < 0)
log(LOG_WARNING, errno, "can't leave group %s on interface %s",
inet_fmt(grp, s1), inet_fmt(ifa, s2));
}
void k_init_dvmrp(void)
{
#ifdef OLD_KERNEL
if (setsockopt(igmp_socket, IPPROTO_IP, MRT_INIT,
(char *)NULL, 0) < 0)
#else
int v=1;
if (setsockopt(igmp_socket, IPPROTO_IP, MRT_INIT,
(char *)&v, sizeof(int)) < 0)
#endif
log(LOG_ERR, errno, "can't enable Multicast routing in kernel");
}
void k_stop_dvmrp(void)
{
if (setsockopt(igmp_socket, IPPROTO_IP, MRT_DONE,
(char *)NULL, 0) < 0)
log(LOG_WARNING, errno, "can't disable Multicast routing in kernel");
}
void k_add_vif(vifi_t vifi, struct uvif *v)
{
struct vifctl vc;
vc.vifc_vifi = vifi;
vc.vifc_flags = v->uv_flags & VIFF_KERNEL_FLAGS;
vc.vifc_threshold = v->uv_threshold;
vc.vifc_rate_limit = v->uv_rate_limit;
vc.vifc_lcl_addr.s_addr = v->uv_lcl_addr;
vc.vifc_rmt_addr.s_addr = v->uv_rmt_addr;
if (setsockopt(igmp_socket, IPPROTO_IP, MRT_ADD_VIF,
(char *)&vc, sizeof(vc)) < 0)
log(LOG_ERR, errno, "setsockopt MRT_ADD_VIF");
}
void k_del_vif(vifi_t vifi)
{
if (setsockopt(igmp_socket, IPPROTO_IP, MRT_DEL_VIF,
(char *)&vifi, sizeof(vifi)) < 0)
log(LOG_ERR, errno, "setsockopt MRT_DEL_VIF");
}
/*
* Adds a (source, mcastgrp) entry to the kernel
*/
void k_add_rg(u_int32_t origin, struct gtable *g)
{
struct mfcctl mc;
vifi_t i;
#ifdef DEBUG_MFC
md_log(MD_ADD, origin, g->gt_mcastgrp);
#endif
/* copy table values so that setsockopt can process it */
mc.mfcc_origin.s_addr = origin;
#ifdef OLD_KERNEL
mc.mfcc_originmask.s_addr = 0xffffffff;
#endif
mc.mfcc_mcastgrp.s_addr = g->gt_mcastgrp;
mc.mfcc_parent = g->gt_route ? g->gt_route->rt_parent : NO_VIF;
for (i = 0; i < numvifs; i++)
mc.mfcc_ttls[i] = g->gt_ttls[i];
/* write to kernel space */
if (setsockopt(igmp_socket, IPPROTO_IP, MRT_ADD_MFC,
(char *)&mc, sizeof(mc)) < 0) {
#ifdef DEBUG_MFC
md_log(MD_ADD_FAIL, origin, g->gt_mcastgrp);
#endif
log(LOG_WARNING, errno, "setsockopt MRT_ADD_MFC");
}
}
/*
* Deletes a (source, mcastgrp) entry from the kernel
*/
int k_del_rg(u_int32_t origin, struct gtable *g)
{
struct mfcctl mc;
int retval;
#ifdef DEBUG_MFC
md_log(MD_DEL, origin, g->gt_mcastgrp);
#endif
/* copy table values so that setsockopt can process it */
mc.mfcc_origin.s_addr = origin;
#ifdef OLD_KERNEL
mc.mfcc_originmask.s_addr = 0xffffffff;
#endif
mc.mfcc_mcastgrp.s_addr = g->gt_mcastgrp;
/* write to kernel space */
if ((retval = setsockopt(igmp_socket, IPPROTO_IP, MRT_DEL_MFC,
(char *)&mc, sizeof(mc))) < 0) {
#ifdef DEBUG_MFC
md_log(MD_DEL_FAIL, origin, g->gt_mcastgrp);
#endif
log(LOG_WARNING, errno, "setsockopt MRT_DEL_MFC");
}
return retval;
}
/*
* Get the kernel's idea of what version of mrouted needs to run with it.
*/
int k_get_version(void)
{
#ifdef OLD_KERNEL
return -1;
#else
int vers;
int len = sizeof(vers);
if (getsockopt(igmp_socket, IPPROTO_IP, MRT_VERSION,
(char *)&vers, &len) < 0)
log(LOG_ERR, errno,
"getsockopt MRT_VERSION: perhaps your kernel is too old");
return vers;
#endif
}
|
