1 /* $NetBSD: bootparam.c,v 1.11 1997/06/26 19:11:32 drochner Exp $ */
4 * Copyright (c) 1995 Gordon W. Ross
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 * 4. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by Gordon W. Ross
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
40 #include <sys/param.h>
41 #include <sys/socket.h>
45 #include <netinet/in.h>
46 #include <netinet/in_systm.h>
56 #include "bootparam.h"
59 #define RPC_PRINTF(a) printf a
64 struct in_addr bp_server_addr; /* net order */
65 n_short bp_server_port; /* net order */
68 * RPC definitions for bootparamd
70 #define BOOTPARAM_PROG 100026
71 #define BOOTPARAM_VERS 1
72 #define BOOTPARAM_WHOAMI 1
73 #define BOOTPARAM_GETFILE 2
76 * Inet address in RPC messages
77 * (Note, really four ints, NOT chars. Blech.)
84 int xdr_inaddr_encode(char **p, struct in_addr ia);
85 int xdr_inaddr_decode(char **p, struct in_addr *ia);
87 int xdr_string_encode(char **p, char *str, int len);
88 int xdr_string_decode(char **p, char *str, int *len_p);
92 * RPC: bootparam/whoami
93 * Given client IP address, get:
94 * client name (hostname)
95 * domain name (domainname)
98 * The hostname and domainname are set here for convenience.
100 * Note - bpsin is initialized to the broadcast address,
101 * and will be replaced with the bootparam server address
102 * after this call is complete. Have to use PMAP_PROC_CALL
103 * to make sure we get responses only from a servers that
104 * know about us (don't want to broadcast a getport call).
110 /* RPC structures for PMAPPROC_CALLIT */
116 struct xdr_inaddr xina;
122 /* encapsulated data here */
126 n_long h[RPC_HEADER_WORDS];
130 n_long h[RPC_HEADER_WORDS];
133 char *send_tail, *recv_head;
137 RPC_PRINTF(("bp_whoami: myip=%s\n", inet_ntoa(myip)));
139 if (!(d = socktodesc(sockfd))) {
140 RPC_PRINTF(("bp_whoami: bad socket. %d\n", sockfd));
147 * Build request args for PMAPPROC_CALLIT.
149 args->prog = htonl(BOOTPARAM_PROG);
150 args->vers = htonl(BOOTPARAM_VERS);
151 args->proc = htonl(BOOTPARAM_WHOAMI);
152 args->arglen = htonl(sizeof(struct xdr_inaddr));
153 send_tail = (char*) &args->xina;
156 * append encapsulated data (client IP address)
158 if (xdr_inaddr_encode(&send_tail, myip))
161 /* RPC: portmap/callit */
162 d->myport = htons(--rpc_port);
163 d->destip.s_addr = INADDR_BROADCAST; /* XXX: subnet bcast? */
164 /* rpc_call will set d->destport */
166 len = rpc_call(d, PMAPPROG, PMAPVERS, PMAPPROC_CALLIT,
167 args, send_tail - (char*)args,
168 repl, sizeof(*repl));
170 printf("bootparamd: 'whoami' call failed\n");
174 /* Save bootparam server address (from IP header). */
175 rpc_fromaddr(repl, &bp_server_addr, &bp_server_port);
178 * Note that bp_server_port is now 111 due to the
179 * indirect call (using PMAPPROC_CALLIT), so get the
180 * actual port number from the reply data.
182 bp_server_port = repl->port;
184 RPC_PRINTF(("bp_whoami: server at %s:%d\n",
185 inet_ntoa(bp_server_addr), ntohs(bp_server_port)));
187 /* We have just done a portmap call, so cache the portnum. */
188 rpc_pmap_putcache(bp_server_addr,
191 (int)ntohs(bp_server_port));
194 * Parse the encapsulated results from bootparam/whoami
196 x = ntohl(repl->encap_len);
198 printf("bp_whoami: short reply, %d < %d\n", len, x);
201 recv_head = (char*) repl->capsule;
204 hostnamelen = MAXHOSTNAMELEN-1;
205 if (xdr_string_decode(&recv_head, hostname, &hostnamelen)) {
206 RPC_PRINTF(("bp_whoami: bad hostname\n"));
211 domainnamelen = MAXHOSTNAMELEN-1;
212 if (xdr_string_decode(&recv_head, domainname, &domainnamelen)) {
213 RPC_PRINTF(("bp_whoami: bad domainname\n"));
217 /* gateway address */
218 if (xdr_inaddr_decode(&recv_head, &gateip)) {
219 RPC_PRINTF(("bp_whoami: bad gateway\n"));
229 * RPC: bootparam/getfile
230 * Given client name and file "key", get:
236 bp_getfile(sockfd, key, serv_addr, pathname)
240 struct in_addr *serv_addr;
243 n_long h[RPC_HEADER_WORDS];
247 n_long h[RPC_HEADER_WORDS];
250 char serv_name[FNAME_SIZE];
251 char *send_tail, *recv_head;
254 int sn_len, path_len, rlen;
256 if (!(d = socktodesc(sockfd))) {
257 RPC_PRINTF(("bp_getfile: bad socket. %d\n", sockfd));
261 send_tail = (char*) sdata.d;
262 recv_head = (char*) rdata.d;
265 * Build request message.
268 /* client name (hostname) */
269 if (xdr_string_encode(&send_tail, hostname, hostnamelen)) {
270 RPC_PRINTF(("bp_getfile: bad client\n"));
274 /* key name (root or swap) */
275 if (xdr_string_encode(&send_tail, key, strlen(key))) {
276 RPC_PRINTF(("bp_getfile: bad key\n"));
280 /* RPC: bootparam/getfile */
281 d->myport = htons(--rpc_port);
282 d->destip = bp_server_addr;
283 /* rpc_call will set d->destport */
286 BOOTPARAM_PROG, BOOTPARAM_VERS, BOOTPARAM_GETFILE,
287 sdata.d, send_tail - (char*)sdata.d,
288 rdata.d, sizeof(rdata.d));
290 RPC_PRINTF(("bp_getfile: short reply\n"));
294 recv_head = (char*) rdata.d;
297 * Parse result message.
301 sn_len = FNAME_SIZE-1;
302 if (xdr_string_decode(&recv_head, serv_name, &sn_len)) {
303 RPC_PRINTF(("bp_getfile: bad server name\n"));
307 /* server IP address (mountd/NFS) */
308 if (xdr_inaddr_decode(&recv_head, serv_addr)) {
309 RPC_PRINTF(("bp_getfile: bad server addr\n"));
313 /* server pathname */
314 path_len = MAXPATHLEN-1;
315 if (xdr_string_decode(&recv_head, pathname, &path_len)) {
316 RPC_PRINTF(("bp_getfile: bad server path\n"));
326 * eXternal Data Representation routines.
327 * (but with non-standard args...)
332 xdr_string_encode(pkt, str, len)
339 int padlen = (len + 3) & ~3; /* padded length */
341 /* The data will be int aligned. */
342 lenp = (u_int32_t*) *pkt;
343 *pkt += sizeof(*lenp);
348 bcopy(str, datap, len);
354 xdr_string_decode(pkt, str, len_p)
357 int *len_p; /* bufsize - 1 */
361 int slen; /* string length */
362 int plen; /* padded length */
364 /* The data will be int aligned. */
365 lenp = (u_int32_t*) *pkt;
366 *pkt += sizeof(*lenp);
368 plen = (slen + 3) & ~3;
374 bcopy(datap, str, slen);
384 xdr_inaddr_encode(pkt, ia)
386 struct in_addr ia; /* network order */
388 struct xdr_inaddr *xi;
392 n_long l; /* network order */
396 /* The data will be int aligned. */
397 xi = (struct xdr_inaddr *) *pkt;
399 xi->atype = htonl(1);
404 * Note: the htonl() calls below DO NOT
405 * imply that uia.l is in host order.
406 * In fact this needs it in net order.
408 *ip++ = htonl((unsigned int)*cp++);
409 *ip++ = htonl((unsigned int)*cp++);
410 *ip++ = htonl((unsigned int)*cp++);
411 *ip++ = htonl((unsigned int)*cp++);
417 xdr_inaddr_decode(pkt, ia)
419 struct in_addr *ia; /* network order */
421 struct xdr_inaddr *xi;
425 n_long l; /* network order */
429 /* The data will be int aligned. */
430 xi = (struct xdr_inaddr *) *pkt;
432 if (xi->atype != htonl(1)) {
433 RPC_PRINTF(("xdr_inaddr_decode: bad addrtype=%d\n",
441 * Note: the ntohl() calls below DO NOT
442 * imply that uia.l is in host order.
443 * In fact this needs it in net order.
445 *cp++ = ntohl(*ip++);
446 *cp++ = ntohl(*ip++);
447 *cp++ = ntohl(*ip++);
448 *cp++ = ntohl(*ip++);