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.
32 * $DragonFly: src/lib/libstand/bootparam.c,v 1.2 2005/12/11 02:27:26 swildner Exp $
39 #include <sys/param.h>
40 #include <sys/socket.h>
44 #include <netinet/in.h>
45 #include <netinet/in_systm.h>
55 #include "bootparam.h"
58 #define RPC_PRINTF(a) printf a
63 struct in_addr bp_server_addr; /* net order */
64 n_short bp_server_port; /* net order */
67 * RPC definitions for bootparamd
69 #define BOOTPARAM_PROG 100026
70 #define BOOTPARAM_VERS 1
71 #define BOOTPARAM_WHOAMI 1
72 #define BOOTPARAM_GETFILE 2
75 * Inet address in RPC messages
76 * (Note, really four ints, NOT chars. Blech.)
83 int xdr_inaddr_encode(char **p, struct in_addr ia);
84 int xdr_inaddr_decode(char **p, struct in_addr *ia);
86 int xdr_string_encode(char **p, char *str, int len);
87 int xdr_string_decode(char **p, char *str, int *len_p);
91 * RPC: bootparam/whoami
92 * Given client IP address, get:
93 * client name (hostname)
94 * domain name (domainname)
97 * The hostname and domainname are set here for convenience.
99 * Note - bpsin is initialized to the broadcast address,
100 * and will be replaced with the bootparam server address
101 * after this call is complete. Have to use PMAP_PROC_CALL
102 * to make sure we get responses only from a servers that
103 * know about us (don't want to broadcast a getport call).
106 bp_whoami(int sockfd)
108 /* RPC structures for PMAPPROC_CALLIT */
114 struct xdr_inaddr xina;
120 /* encapsulated data here */
124 n_long h[RPC_HEADER_WORDS];
128 n_long h[RPC_HEADER_WORDS];
131 char *send_tail, *recv_head;
135 RPC_PRINTF(("bp_whoami: myip=%s\n", inet_ntoa(myip)));
137 if (!(d = socktodesc(sockfd))) {
138 RPC_PRINTF(("bp_whoami: bad socket. %d\n", sockfd));
145 * Build request args for PMAPPROC_CALLIT.
147 args->prog = htonl(BOOTPARAM_PROG);
148 args->vers = htonl(BOOTPARAM_VERS);
149 args->proc = htonl(BOOTPARAM_WHOAMI);
150 args->arglen = htonl(sizeof(struct xdr_inaddr));
151 send_tail = (char*) &args->xina;
154 * append encapsulated data (client IP address)
156 if (xdr_inaddr_encode(&send_tail, myip))
159 /* RPC: portmap/callit */
160 d->myport = htons(--rpc_port);
161 d->destip.s_addr = INADDR_BROADCAST; /* XXX: subnet bcast? */
162 /* rpc_call will set d->destport */
164 len = rpc_call(d, PMAPPROG, PMAPVERS, PMAPPROC_CALLIT,
165 args, send_tail - (char*)args,
166 repl, sizeof(*repl));
168 printf("bootparamd: 'whoami' call failed\n");
172 /* Save bootparam server address (from IP header). */
173 rpc_fromaddr(repl, &bp_server_addr, &bp_server_port);
176 * Note that bp_server_port is now 111 due to the
177 * indirect call (using PMAPPROC_CALLIT), so get the
178 * actual port number from the reply data.
180 bp_server_port = repl->port;
182 RPC_PRINTF(("bp_whoami: server at %s:%d\n",
183 inet_ntoa(bp_server_addr), ntohs(bp_server_port)));
185 /* We have just done a portmap call, so cache the portnum. */
186 rpc_pmap_putcache(bp_server_addr,
189 (int)ntohs(bp_server_port));
192 * Parse the encapsulated results from bootparam/whoami
194 x = ntohl(repl->encap_len);
196 printf("bp_whoami: short reply, %d < %d\n", len, x);
199 recv_head = (char*) repl->capsule;
202 hostnamelen = MAXHOSTNAMELEN-1;
203 if (xdr_string_decode(&recv_head, hostname, &hostnamelen)) {
204 RPC_PRINTF(("bp_whoami: bad hostname\n"));
209 domainnamelen = MAXHOSTNAMELEN-1;
210 if (xdr_string_decode(&recv_head, domainname, &domainnamelen)) {
211 RPC_PRINTF(("bp_whoami: bad domainname\n"));
215 /* gateway address */
216 if (xdr_inaddr_decode(&recv_head, &gateip)) {
217 RPC_PRINTF(("bp_whoami: bad gateway\n"));
227 * RPC: bootparam/getfile
228 * Given client name and file "key", get:
234 bp_getfile(int sockfd, char *key, struct in_addr *serv_addr, char *pathname)
237 n_long h[RPC_HEADER_WORDS];
241 n_long h[RPC_HEADER_WORDS];
244 char serv_name[FNAME_SIZE];
245 char *send_tail, *recv_head;
248 int sn_len, path_len, rlen;
250 if (!(d = socktodesc(sockfd))) {
251 RPC_PRINTF(("bp_getfile: bad socket. %d\n", sockfd));
255 send_tail = (char*) sdata.d;
256 recv_head = (char*) rdata.d;
259 * Build request message.
262 /* client name (hostname) */
263 if (xdr_string_encode(&send_tail, hostname, hostnamelen)) {
264 RPC_PRINTF(("bp_getfile: bad client\n"));
268 /* key name (root or swap) */
269 if (xdr_string_encode(&send_tail, key, strlen(key))) {
270 RPC_PRINTF(("bp_getfile: bad key\n"));
274 /* RPC: bootparam/getfile */
275 d->myport = htons(--rpc_port);
276 d->destip = bp_server_addr;
277 /* rpc_call will set d->destport */
280 BOOTPARAM_PROG, BOOTPARAM_VERS, BOOTPARAM_GETFILE,
281 sdata.d, send_tail - (char*)sdata.d,
282 rdata.d, sizeof(rdata.d));
284 RPC_PRINTF(("bp_getfile: short reply\n"));
288 recv_head = (char*) rdata.d;
291 * Parse result message.
295 sn_len = FNAME_SIZE-1;
296 if (xdr_string_decode(&recv_head, serv_name, &sn_len)) {
297 RPC_PRINTF(("bp_getfile: bad server name\n"));
301 /* server IP address (mountd/NFS) */
302 if (xdr_inaddr_decode(&recv_head, serv_addr)) {
303 RPC_PRINTF(("bp_getfile: bad server addr\n"));
307 /* server pathname */
308 path_len = MAXPATHLEN-1;
309 if (xdr_string_decode(&recv_head, pathname, &path_len)) {
310 RPC_PRINTF(("bp_getfile: bad server path\n"));
320 * eXternal Data Representation routines.
321 * (but with non-standard args...)
326 xdr_string_encode(char **pkt, char *str, int len)
330 int padlen = (len + 3) & ~3; /* padded length */
332 /* The data will be int aligned. */
333 lenp = (u_int32_t*) *pkt;
334 *pkt += sizeof(*lenp);
339 bcopy(str, datap, len);
349 xdr_string_decode(char **pkt, char *str, int *len_p)
353 int slen; /* string length */
354 int plen; /* padded length */
356 /* The data will be int aligned. */
357 lenp = (u_int32_t*) *pkt;
358 *pkt += sizeof(*lenp);
360 plen = (slen + 3) & ~3;
366 bcopy(datap, str, slen);
379 xdr_inaddr_encode(char **pkt, struct in_addr ia)
381 struct xdr_inaddr *xi;
385 n_long l; /* network order */
389 /* The data will be int aligned. */
390 xi = (struct xdr_inaddr *) *pkt;
392 xi->atype = htonl(1);
397 * Note: the htonl() calls below DO NOT
398 * imply that uia.l is in host order.
399 * In fact this needs it in net order.
401 *ip++ = htonl((unsigned int)*cp++);
402 *ip++ = htonl((unsigned int)*cp++);
403 *ip++ = htonl((unsigned int)*cp++);
404 *ip++ = htonl((unsigned int)*cp++);
414 xdr_inaddr_decode(char **pkt, struct in_addr *ia)
416 struct xdr_inaddr *xi;
420 n_long l; /* network order */
424 /* The data will be int aligned. */
425 xi = (struct xdr_inaddr *) *pkt;
427 if (xi->atype != htonl(1)) {
428 RPC_PRINTF(("xdr_inaddr_decode: bad addrtype=%d\n",
436 * Note: the ntohl() calls below DO NOT
437 * imply that uia.l is in host order.
438 * In fact this needs it in net order.
440 *cp++ = ntohl(*ip++);
441 *cp++ = ntohl(*ip++);
442 *cp++ = ntohl(*ip++);
443 *cp++ = ntohl(*ip++);