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
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
|
/* $OpenBSD: bootparamd.c,v 1.21 2016/10/16 10:40:58 jca Exp $ */
/*
* This code is not copyright, and is placed in the public domain.
* Feel free to use and modify. Please send modifications and/or
* suggestions + bug fixes to Klas Heggemann <klas@nada.kth.se>
*
* Various small changes by Theo de Raadt <deraadt@fsa.ca>
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <rpc/rpc.h>
#include <rpcsvc/bootparam_prot.h>
#include <rpcsvc/ypclnt.h>
#include <rpcsvc/yp_prot.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <netdb.h>
#include <ctype.h>
#include <syslog.h>
#include <string.h>
#include <unistd.h>
#include <err.h>
#include <stdlib.h>
#include "pathnames.h"
#define MAXLEN 800
struct hostent *he;
static char hostname[MAX_MACHINE_NAME];
static char askname[MAX_MACHINE_NAME];
static char domain_name[MAX_MACHINE_NAME];
extern void bootparamprog_1(struct svc_req *, SVCXPRT *);
int lookup_bootparam(char *client, char *client_canonical, char *id,
char **server, char **path);
int _rpcsvcdirty = 0;
int _rpcpmstart = 0;
int debug = 0;
int dolog = 0;
struct in_addr route_addr;
struct sockaddr_in my_addr;
extern char *__progname;
char *bootpfile = _PATH_BOOTPARAMS;
extern char *optarg;
extern int optind;
static void
usage(void)
{
extern char *__progname;
fprintf(stderr, "usage: %s [-ds] [-f file] [-r router]\n",
__progname);
exit(1);
}
/*
* ever familiar
*/
int
main(int argc, char *argv[])
{
struct hostent *he;
struct stat buf;
SVCXPRT *transp;
int c;
while ((c = getopt(argc, argv, "dsr:f:")) != -1)
switch (c) {
case 'd':
debug = 1;
break;
case 'r':
if (inet_aton(optarg, &route_addr) == 1)
break;
he = gethostbyname(optarg);
if (!he) {
warnx("no such host: %s", optarg);
usage();
}
bcopy(he->h_addr, &route_addr.s_addr,
sizeof(route_addr.s_addr));
break;
case 'f':
bootpfile = optarg;
break;
case 's':
dolog = 1;
#ifndef LOG_DAEMON
openlog(__progname, 0, 0);
#else
openlog(__progname, 0, LOG_DAEMON);
setlogmask(LOG_UPTO(LOG_NOTICE));
#endif
break;
default:
usage();
}
if (stat(bootpfile, &buf))
err(1, "%s", bootpfile);
if (!route_addr.s_addr) {
get_myaddress(&my_addr);
bcopy(&my_addr.sin_addr.s_addr, &route_addr.s_addr,
sizeof(route_addr.s_addr));
}
if (!debug) {
if (daemon(0, 0))
err(1, "can't detach from terminal");
}
(void) pmap_unset(BOOTPARAMPROG, BOOTPARAMVERS);
transp = svcudp_create(RPC_ANYSOCK);
if (transp == NULL)
errx(1, "can't create udp service");
if (!svc_register(transp, BOOTPARAMPROG, BOOTPARAMVERS, bootparamprog_1,
IPPROTO_UDP))
errx(1, "unable to register BOOTPARAMPROG version %ld, udp",
BOOTPARAMVERS);
if (pledge("stdio rpath dns", NULL) == -1)
err(1, "pledge");
svc_run();
errx(1, "svc_run returned");
}
bp_whoami_res *
bootparamproc_whoami_1_svc(bp_whoami_arg *whoami, struct svc_req *rqstp)
{
in_addr_t haddr;
static bp_whoami_res res;
if (debug)
warnx("whoami got question for %d.%d.%d.%d",
255 & whoami->client_address.bp_address_u.ip_addr.net,
255 & whoami->client_address.bp_address_u.ip_addr.host,
255 & whoami->client_address.bp_address_u.ip_addr.lh,
255 & whoami->client_address.bp_address_u.ip_addr.impno);
if (dolog)
syslog(LOG_NOTICE, "whoami got question for %d.%d.%d.%d",
255 & whoami->client_address.bp_address_u.ip_addr.net,
255 & whoami->client_address.bp_address_u.ip_addr.host,
255 & whoami->client_address.bp_address_u.ip_addr.lh,
255 & whoami->client_address.bp_address_u.ip_addr.impno);
bcopy(&whoami->client_address.bp_address_u.ip_addr,
&haddr, sizeof(haddr));
he = gethostbyaddr(&haddr, sizeof(haddr), AF_INET);
if (!he)
goto failed;
if (debug)
warnx("This is host %s", he->h_name);
if (dolog)
syslog(LOG_NOTICE, "This is host %s", he->h_name);
strlcpy(askname, he->h_name, sizeof askname);
if (!lookup_bootparam(askname, hostname, NULL, NULL, NULL)) {
res.client_name = hostname;
getdomainname(domain_name, MAX_MACHINE_NAME);
res.domain_name = domain_name;
if (res.router_address.address_type != IP_ADDR_TYPE) {
res.router_address.address_type = IP_ADDR_TYPE;
bcopy(&route_addr.s_addr,
&res.router_address.bp_address_u.ip_addr, 4);
}
if (debug)
warnx("Returning %s %s %d.%d.%d.%d",
res.client_name, res.domain_name,
255 & res.router_address.bp_address_u.ip_addr.net,
255 & res.router_address.bp_address_u.ip_addr.host,
255 & res.router_address.bp_address_u.ip_addr.lh,
255 & res.router_address.bp_address_u.ip_addr.impno);
if (dolog)
syslog(LOG_NOTICE, "Returning %s %s %d.%d.%d.%d",
res.client_name, res.domain_name,
255 & res.router_address.bp_address_u.ip_addr.net,
255 & res.router_address.bp_address_u.ip_addr.host,
255 & res.router_address.bp_address_u.ip_addr.lh,
255 & res.router_address.bp_address_u.ip_addr.impno);
return (&res);
}
failed:
if (debug)
warnx("whoami failed");
if (dolog)
syslog(LOG_NOTICE, "whoami failed");
return (NULL);
}
bp_getfile_res *
bootparamproc_getfile_1_svc(bp_getfile_arg *getfile, struct svc_req *rqstp)
{
static bp_getfile_res res;
int error;
if (debug)
warnx("getfile got question for \"%s\" and file \"%s\"",
getfile->client_name, getfile->file_id);
if (dolog)
syslog(LOG_NOTICE,
"getfile got question for \"%s\" and file \"%s\"",
getfile->client_name, getfile->file_id);
he = NULL;
he = gethostbyname(getfile->client_name);
if (!he)
goto failed;
strlcpy(askname, he->h_name, sizeof askname);
error = lookup_bootparam(askname, NULL, getfile->file_id,
&res.server_name, &res.server_path);
if (error == 0) {
he = gethostbyname(res.server_name);
if (!he)
goto failed;
bcopy(he->h_addr, &res.server_address.bp_address_u.ip_addr, 4);
res.server_address.address_type = IP_ADDR_TYPE;
} else if (error == ENOENT && !strcmp(getfile->file_id, "dump")) {
/* Special for dump, answer with null strings. */
res.server_name[0] = '\0';
res.server_path[0] = '\0';
bzero(&res.server_address.bp_address_u.ip_addr, 4);
} else {
failed:
if (debug)
warnx("getfile failed for %s", getfile->client_name);
if (dolog)
syslog(LOG_NOTICE,
"getfile failed for %s", getfile->client_name);
return (NULL);
}
if (debug)
warnx("returning server:%s path:%s address: %d.%d.%d.%d",
res.server_name, res.server_path,
255 & res.server_address.bp_address_u.ip_addr.net,
255 & res.server_address.bp_address_u.ip_addr.host,
255 & res.server_address.bp_address_u.ip_addr.lh,
255 & res.server_address.bp_address_u.ip_addr.impno);
if (dolog)
syslog(LOG_NOTICE,
"returning server:%s path:%s address: %d.%d.%d.%d",
res.server_name, res.server_path,
255 & res.server_address.bp_address_u.ip_addr.net,
255 & res.server_address.bp_address_u.ip_addr.host,
255 & res.server_address.bp_address_u.ip_addr.lh,
255 & res.server_address.bp_address_u.ip_addr.impno);
return (&res);
}
int
lookup_bootparam(char *client, char *client_canonical, char *id,
char **server, char **path)
{
FILE *f;
static char buf[BUFSIZ];
char *bp, *word = NULL;
size_t idlen = id == NULL ? 0 : strlen(id);
int contin = 0, found = 0;
f = fopen(bootpfile, "r");
if (f == NULL)
return EINVAL; /* ? */
while (fgets(buf, sizeof buf, f)) {
int wascontin = contin;
contin = buf[strlen(buf) - 2] == '\\';
bp = buf + strspn(buf, " \t\n");
switch (wascontin) {
case -1:
/* Continuation of uninteresting line */
contin *= -1;
continue;
case 0:
/* New line */
contin *= -1;
if (*bp == '#')
continue;
if ((word = strsep(&bp, " \t\n")) == NULL)
continue;
/* See if this line's client is the one we are
* looking for */
if (strcasecmp(word, client) != 0) {
/*
* If it didn't match, try getting the
* canonical host name of the client
* on this line and comparing that to
* the client we are looking for
*/
struct hostent *hp = gethostbyname(word);
if (hp == NULL || strcasecmp(hp->h_name, client))
continue;
}
contin *= -1;
break;
case 1:
/* Continued line we want to parse below */
break;
}
if (client_canonical)
strlcpy(client_canonical, word, MAX_MACHINE_NAME);
/* We have found a line for CLIENT */
if (id == NULL) {
(void) fclose(f);
return 0;
}
/* Look for a value for the parameter named by ID */
while ((word = strsep(&bp, " \t\n")) != NULL) {
if (!strncmp(word, id, idlen) && word[idlen] == '=') {
/* We have found the entry we want */
*server = &word[idlen + 1];
*path = strchr(*server, ':');
if (*path == NULL)
/* Malformed entry */
continue;
*(*path)++ = '\0';
(void) fclose(f);
return 0;
}
}
found = 1;
}
(void) fclose(f);
return found ? ENOENT : EPERM;
}
|
