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
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
|
/* $NetBSD: defs.h,v 1.6 1995/12/10 10:06:59 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 <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <errno.h>
#include <syslog.h>
#include <signal.h>
#include <string.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#ifdef SYSV
#include <sys/sockio.h>
#endif
#include <sys/time.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/igmp.h>
#include <netinet/ip_mroute.h>
#ifdef RSRR
#include <sys/un.h>
#endif /* RSRR */
typedef void (*cfunc_t)(void *);
typedef void (*ihfunc_t)(int);
#include "dvmrp.h"
#include "vif.h"
#include "route.h"
#include "prune.h"
#include "pathnames.h"
#ifdef RSRR
#include "rsrr.h"
#include "rsrr_var.h"
#endif /* RSRR */
/*
* Miscellaneous constants and macros.
*/
#define FALSE 0
#define TRUE 1
#define EQUAL(s1, s2) (strcmp((s1), (s2)) == 0)
#define TIMER_INTERVAL ROUTE_MAX_REPORT_DELAY
#define VENDOR_CODE 1 /* Get a new vendor code if you make significant
* changes to mrouted. */
#define PROTOCOL_VERSION 3 /* increment when packet format/content changes */
#define MROUTED_VERSION 8 /* increment on local changes or bug fixes, */
/* reset to 0 whenever PROTOCOL_VERSION increments */
#define MROUTED_LEVEL ((MROUTED_VERSION << 8) | PROTOCOL_VERSION | \
((NF_PRUNE | NF_GENID | NF_MTRACE) << 16) | \
(VENDOR_CODE << 24))
/* for IGMP 'group' field of DVMRP messages */
#define LEAF_FLAGS (( vifs_with_neighbors == 1 ) ? 0x010000 : 0)
/* more for IGMP 'group' field of DVMRP messages */
#define DEL_RTE_GROUP 0
#define DEL_ALL_ROUTES 1
/* for Deleting kernel table entries */
#define JAN_1970 2208988800UL /* 1970 - 1900 in seconds */
#ifdef RSRR
#define BIT_ZERO(X) ((X) = 0)
#define BIT_SET(X,n) ((X) |= 1 << (n))
#define BIT_CLR(X,n) ((X) &= ~(1 << (n)))
#define BIT_TST(X,n) ((X) & 1 << (n))
#endif /* RSRR */
#ifdef SYSV
#define bcopy(a, b, c) memcpy(b, a, c)
#define bzero(s, n) memset((s), 0, (n))
#define setlinebuf(s) setvbuf(s, NULL, _IOLBF, 0)
#define signal(s,f) sigset(s,f)
#endif
/*
* External declarations for global variables and functions.
*/
#define RECV_BUF_SIZE 8192
extern char *recv_buf;
extern char *send_buf;
extern int igmp_socket;
#ifdef RSRR
extern int rsrr_socket;
#endif /* RSRR */
extern u_int32_t allhosts_group;
extern u_int32_t allrtrs_group;
extern u_int32_t dvmrp_group;
extern u_int32_t dvmrp_genid;
#define DEFAULT_DEBUG 2 /* default if "-d" given without value */
extern int debug;
extern u_char pruning;
extern int routes_changed;
extern int delay_change_reports;
extern unsigned nroutes;
extern struct uvif uvifs[MAXVIFS];
extern vifi_t numvifs;
extern int vifs_down;
extern int udp_socket;
extern int vifs_with_neighbors;
extern char s1[];
extern char s2[];
extern char s3[];
extern char s4[];
#if !(defined(BSD) && (BSD >= 199103))
extern int errno;
extern int sys_nerr;
extern char * sys_errlist[];
#endif
#ifdef OLD_KERNEL
#define MRT_INIT DVMRP_INIT
#define MRT_DONE DVMRP_DONE
#define MRT_ADD_VIF DVMRP_ADD_VIF
#define MRT_DEL_VIF DVMRP_DEL_VIF
#define MRT_ADD_MFC DVMRP_ADD_MFC
#define MRT_DEL_MFC DVMRP_DEL_MFC
#define IGMP_PIM 0x14
#endif
/* main.c */
extern void logit(int, int, char *, ...);
extern int register_input_handler(int fd, ihfunc_t func);
/* igmp.c */
extern void init_igmp(void);
extern void accept_igmp(int recvlen);
extern void send_igmp(u_int32_t src, u_int32_t dst, int type,
int code, u_int32_t group, int datalen);
/* callout.c */
extern void callout_init(void);
extern void age_callout_queue(void);
extern int timer_setTimer(int delay, cfunc_t action, char *data);
extern void timer_clearTimer(int timer_id);
/* route.c */
extern void init_routes(void);
extern void start_route_updates(void);
extern void update_route(u_int32_t origin, u_int32_t mask,
u_int metric, u_int32_t src, vifi_t vifi);
extern void age_routes(void);
extern void expire_all_routes(void);
extern void free_all_routes(void);
extern void accept_probe(u_int32_t src, u_int32_t dst, char *p,
int datalen, u_int32_t level);
extern void accept_report(u_int32_t src, u_int32_t dst, char *p,
int datalen, u_int32_t level);
extern struct rtentry * determine_route(u_int32_t src);
extern void report(int which_routes, vifi_t vifi, u_int32_t dst);
extern void report_to_all_neighbors(int which_routes);
extern int report_next_chunk(void);
extern void add_vif_to_routes(vifi_t vifi);
extern void delete_vif_from_routes(vifi_t vifi);
extern void delete_neighbor_from_routes(u_int32_t addr,
vifi_t vifi);
extern void dump_routes(FILE *fp);
extern void start_route_updates(void);
/* vif.c */
extern void init_vifs(void);
extern void check_vif_state(void);
extern vifi_t find_vif(u_int32_t src, u_int32_t dst);
extern void age_vifs(void);
extern void dump_vifs(FILE *fp);
extern void stop_all_vifs(void);
extern struct listaddr *neighbor_info(vifi_t vifi, u_int32_t addr);
extern void accept_group_report(u_int32_t src, u_int32_t dst,
u_int32_t group, int r_type);
extern void query_groups(void);
extern void probe_for_neighbors(void);
extern int update_neighbor(vifi_t vifi, u_int32_t addr,
int msgtype, char *p, int datalen, u_int32_t level);
extern void accept_neighbor_request(u_int32_t src, u_int32_t dst);
extern void accept_neighbor_request2(u_int32_t src, u_int32_t dst);
extern void accept_neighbors(u_int32_t src, u_int32_t dst,
u_char *p, int datalen, u_int32_t level);
extern void accept_neighbors2(u_int32_t src, u_int32_t dst,
u_char *p, int datalen, u_int32_t level);
extern void accept_leave_message(u_int32_t src, u_int32_t dst,
u_int32_t group);
extern void accept_membership_query(u_int32_t src, u_int32_t dst,
u_int32_t group, int tmo);
extern void init_installvifs(void);
/* config.c */
extern void config_vifs_from_kernel(void);
/* cfparse.y */
extern void config_vifs_from_file(void);
/* inet.c */
extern int inet_valid_host(u_int32_t naddr);
extern int inet_valid_subnet(u_int32_t nsubnet, u_int32_t nmask);
extern char * inet_fmt(u_int32_t addr, char *s);
extern char * inet_fmts(u_int32_t addr, u_int32_t mask, char *s);
extern u_int32_t inet_parse(char *s);
extern int inet_cksum(u_int16_t *addr, u_int len);
extern int inet_valid_host(u_int32_t naddr);
extern int inet_valid_mask(u_int32_t mask);
/* prune.c */
extern unsigned kroutes;
extern void add_table_entry(u_int32_t origin, u_int32_t mcastgrp);
extern void del_table_entry(struct rtentry *r,
u_int32_t mcastgrp, u_int del_flag);
extern void update_table_entry(struct rtentry *r);
extern void init_ktable(void);
extern void accept_prune(u_int32_t src, u_int32_t dst, char *p,
int datalen);
extern void steal_sources(struct rtentry *rt);
extern void reset_neighbor_state(vifi_t vifi, u_int32_t addr);
extern int grplst_mem(vifi_t vifi, u_int32_t mcastgrp);
extern int scoped_addr(vifi_t vifi, u_int32_t addr);
extern void free_all_prunes(void);
extern void age_table_entry(void);
extern void dump_cache(FILE *fp2);
extern void update_lclgrp(vifi_t vifi, u_int32_t mcastgrp);
extern void delete_lclgrp(vifi_t vifi, u_int32_t mcastgrp);
extern void chkgrp_graft(vifi_t vifi, u_int32_t mcastgrp);
extern void accept_graft(u_int32_t src, u_int32_t dst, char *p,
int datalen);
extern void accept_g_ack(u_int32_t src, u_int32_t dst, char *p,
int datalen);
/* u_int is promoted u_char */
extern void accept_mtrace(u_int32_t src, u_int32_t dst,
u_int32_t group, char *data, u_int no, int datalen);
extern void accept_info_request(u_int32_t src, u_int32_t dst,
u_char *p, int datalen);
extern void accept_info_reply(u_int32_t src, u_int32_t dst,
u_char *p, int datalen);
/* kern.c */
extern void k_set_rcvbuf(int bufsize);
extern void k_hdr_include(int bool);
extern void k_set_ttl(int t);
extern void k_set_loop(int l);
extern void k_set_if(u_int32_t ifa);
extern void k_join(u_int32_t grp, u_int32_t ifa);
extern void k_leave(u_int32_t grp, u_int32_t ifa);
extern void k_init_dvmrp(void);
extern void k_stop_dvmrp(void);
extern void k_add_vif(vifi_t vifi, struct uvif *v);
extern void k_del_vif(vifi_t vifi);
extern void k_add_rg(u_int32_t origin, struct gtable *g);
extern int k_del_rg(u_int32_t origin, struct gtable *g);
extern int k_get_version(void);
#ifdef RSRR
/* prune.c */
extern struct gtable *kernel_table;
extern struct gtable *gtp;
extern int find_src_grp(u_int32_t src, u_int32_t mask,
u_int32_t grp);
/* rsrr.c */
extern void rsrr_init(void);
extern void rsrr_read(int f);
extern void rsrr_clean(void);
extern void rsrr_cache_send(struct gtable *gt, int notify);
extern void rsrr_cache_clean(struct gtable *gt);
#endif /* RSRR */
|
