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-rw-r--r--lib/libstand/bootparam.c449
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diff --git a/lib/libstand/bootparam.c b/lib/libstand/bootparam.c
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+/* $NetBSD: bootparam.c,v 1.11 1997/06/26 19:11:32 drochner Exp $ */
+
+/*
+ * Copyright (c) 1995 Gordon W. Ross
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ * 4. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by Gordon W. Ross
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * RPC/bootparams
+ */
+
+#include <sys/param.h>
+#include <sys/socket.h>
+
+#include <net/if.h>
+
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+
+#include <string.h>
+
+#include "rpcv2.h"
+
+#include "stand.h"
+#include "net.h"
+#include "netif.h"
+#include "rpc.h"
+#include "bootparam.h"
+
+#ifdef DEBUG_RPC
+#define RPC_PRINTF(a) printf a
+#else
+#define RPC_PRINTF(a)
+#endif
+
+struct in_addr bp_server_addr; /* net order */
+n_short bp_server_port; /* net order */
+
+/*
+ * RPC definitions for bootparamd
+ */
+#define BOOTPARAM_PROG 100026
+#define BOOTPARAM_VERS 1
+#define BOOTPARAM_WHOAMI 1
+#define BOOTPARAM_GETFILE 2
+
+/*
+ * Inet address in RPC messages
+ * (Note, really four ints, NOT chars. Blech.)
+ */
+struct xdr_inaddr {
+ u_int32_t atype;
+ int32_t addr[4];
+};
+
+int xdr_inaddr_encode(char **p, struct in_addr ia);
+int xdr_inaddr_decode(char **p, struct in_addr *ia);
+
+int xdr_string_encode(char **p, char *str, int len);
+int xdr_string_decode(char **p, char *str, int *len_p);
+
+
+/*
+ * RPC: bootparam/whoami
+ * Given client IP address, get:
+ * client name (hostname)
+ * domain name (domainname)
+ * gateway address
+ *
+ * The hostname and domainname are set here for convenience.
+ *
+ * Note - bpsin is initialized to the broadcast address,
+ * and will be replaced with the bootparam server address
+ * after this call is complete. Have to use PMAP_PROC_CALL
+ * to make sure we get responses only from a servers that
+ * know about us (don't want to broadcast a getport call).
+ */
+int
+bp_whoami(sockfd)
+ int sockfd;
+{
+ /* RPC structures for PMAPPROC_CALLIT */
+ struct args {
+ u_int32_t prog;
+ u_int32_t vers;
+ u_int32_t proc;
+ u_int32_t arglen;
+ struct xdr_inaddr xina;
+ } *args;
+ struct repl {
+ u_int16_t _pad;
+ u_int16_t port;
+ u_int32_t encap_len;
+ /* encapsulated data here */
+ n_long capsule[64];
+ } *repl;
+ struct {
+ n_long h[RPC_HEADER_WORDS];
+ struct args d;
+ } sdata;
+ struct {
+ n_long h[RPC_HEADER_WORDS];
+ struct repl d;
+ } rdata;
+ char *send_tail, *recv_head;
+ struct iodesc *d;
+ int len, x;
+
+ RPC_PRINTF(("bp_whoami: myip=%s\n", inet_ntoa(myip)));
+
+ if (!(d = socktodesc(sockfd))) {
+ RPC_PRINTF(("bp_whoami: bad socket. %d\n", sockfd));
+ return (-1);
+ }
+ args = &sdata.d;
+ repl = &rdata.d;
+
+ /*
+ * Build request args for PMAPPROC_CALLIT.
+ */
+ args->prog = htonl(BOOTPARAM_PROG);
+ args->vers = htonl(BOOTPARAM_VERS);
+ args->proc = htonl(BOOTPARAM_WHOAMI);
+ args->arglen = htonl(sizeof(struct xdr_inaddr));
+ send_tail = (char*) &args->xina;
+
+ /*
+ * append encapsulated data (client IP address)
+ */
+ if (xdr_inaddr_encode(&send_tail, myip))
+ return (-1);
+
+ /* RPC: portmap/callit */
+ d->myport = htons(--rpc_port);
+ d->destip.s_addr = INADDR_BROADCAST; /* XXX: subnet bcast? */
+ /* rpc_call will set d->destport */
+
+ len = rpc_call(d, PMAPPROG, PMAPVERS, PMAPPROC_CALLIT,
+ args, send_tail - (char*)args,
+ repl, sizeof(*repl));
+ if (len < 8) {
+ printf("bootparamd: 'whoami' call failed\n");
+ return (-1);
+ }
+
+ /* Save bootparam server address (from IP header). */
+ rpc_fromaddr(repl, &bp_server_addr, &bp_server_port);
+
+ /*
+ * Note that bp_server_port is now 111 due to the
+ * indirect call (using PMAPPROC_CALLIT), so get the
+ * actual port number from the reply data.
+ */
+ bp_server_port = repl->port;
+
+ RPC_PRINTF(("bp_whoami: server at %s:%d\n",
+ inet_ntoa(bp_server_addr), ntohs(bp_server_port)));
+
+ /* We have just done a portmap call, so cache the portnum. */
+ rpc_pmap_putcache(bp_server_addr,
+ BOOTPARAM_PROG,
+ BOOTPARAM_VERS,
+ (int)ntohs(bp_server_port));
+
+ /*
+ * Parse the encapsulated results from bootparam/whoami
+ */
+ x = ntohl(repl->encap_len);
+ if (len < x) {
+ printf("bp_whoami: short reply, %d < %d\n", len, x);
+ return (-1);
+ }
+ recv_head = (char*) repl->capsule;
+
+ /* client name */
+ hostnamelen = MAXHOSTNAMELEN-1;
+ if (xdr_string_decode(&recv_head, hostname, &hostnamelen)) {
+ RPC_PRINTF(("bp_whoami: bad hostname\n"));
+ return (-1);
+ }
+
+ /* domain name */
+ domainnamelen = MAXHOSTNAMELEN-1;
+ if (xdr_string_decode(&recv_head, domainname, &domainnamelen)) {
+ RPC_PRINTF(("bp_whoami: bad domainname\n"));
+ return (-1);
+ }
+
+ /* gateway address */
+ if (xdr_inaddr_decode(&recv_head, &gateip)) {
+ RPC_PRINTF(("bp_whoami: bad gateway\n"));
+ return (-1);
+ }
+
+ /* success */
+ return(0);
+}
+
+
+/*
+ * RPC: bootparam/getfile
+ * Given client name and file "key", get:
+ * server name
+ * server IP address
+ * server pathname
+ */
+int
+bp_getfile(sockfd, key, serv_addr, pathname)
+ int sockfd;
+ char *key;
+ char *pathname;
+ struct in_addr *serv_addr;
+{
+ struct {
+ n_long h[RPC_HEADER_WORDS];
+ n_long d[64];
+ } sdata;
+ struct {
+ n_long h[RPC_HEADER_WORDS];
+ n_long d[128];
+ } rdata;
+ char serv_name[FNAME_SIZE];
+ char *send_tail, *recv_head;
+ /* misc... */
+ struct iodesc *d;
+ int sn_len, path_len, rlen;
+
+ if (!(d = socktodesc(sockfd))) {
+ RPC_PRINTF(("bp_getfile: bad socket. %d\n", sockfd));
+ return (-1);
+ }
+
+ send_tail = (char*) sdata.d;
+ recv_head = (char*) rdata.d;
+
+ /*
+ * Build request message.
+ */
+
+ /* client name (hostname) */
+ if (xdr_string_encode(&send_tail, hostname, hostnamelen)) {
+ RPC_PRINTF(("bp_getfile: bad client\n"));
+ return (-1);
+ }
+
+ /* key name (root or swap) */
+ if (xdr_string_encode(&send_tail, key, strlen(key))) {
+ RPC_PRINTF(("bp_getfile: bad key\n"));
+ return (-1);
+ }
+
+ /* RPC: bootparam/getfile */
+ d->myport = htons(--rpc_port);
+ d->destip = bp_server_addr;
+ /* rpc_call will set d->destport */
+
+ rlen = rpc_call(d,
+ BOOTPARAM_PROG, BOOTPARAM_VERS, BOOTPARAM_GETFILE,
+ sdata.d, send_tail - (char*)sdata.d,
+ rdata.d, sizeof(rdata.d));
+ if (rlen < 4) {
+ RPC_PRINTF(("bp_getfile: short reply\n"));
+ errno = EBADRPC;
+ return (-1);
+ }
+ recv_head = (char*) rdata.d;
+
+ /*
+ * Parse result message.
+ */
+
+ /* server name */
+ sn_len = FNAME_SIZE-1;
+ if (xdr_string_decode(&recv_head, serv_name, &sn_len)) {
+ RPC_PRINTF(("bp_getfile: bad server name\n"));
+ return (-1);
+ }
+
+ /* server IP address (mountd/NFS) */
+ if (xdr_inaddr_decode(&recv_head, serv_addr)) {
+ RPC_PRINTF(("bp_getfile: bad server addr\n"));
+ return (-1);
+ }
+
+ /* server pathname */
+ path_len = MAXPATHLEN-1;
+ if (xdr_string_decode(&recv_head, pathname, &path_len)) {
+ RPC_PRINTF(("bp_getfile: bad server path\n"));
+ return (-1);
+ }
+
+ /* success */
+ return(0);
+}
+
+
+/*
+ * eXternal Data Representation routines.
+ * (but with non-standard args...)
+ */
+
+
+int
+xdr_string_encode(pkt, str, len)
+ char **pkt;
+ char *str;
+ int len;
+{
+ u_int32_t *lenp;
+ char *datap;
+ int padlen = (len + 3) & ~3; /* padded length */
+
+ /* The data will be int aligned. */
+ lenp = (u_int32_t*) *pkt;
+ *pkt += sizeof(*lenp);
+ *lenp = htonl(len);
+
+ datap = *pkt;
+ *pkt += padlen;
+ bcopy(str, datap, len);
+
+ return (0);
+}
+
+int
+xdr_string_decode(pkt, str, len_p)
+ char **pkt;
+ char *str;
+ int *len_p; /* bufsize - 1 */
+{
+ u_int32_t *lenp;
+ char *datap;
+ int slen; /* string length */
+ int plen; /* padded length */
+
+ /* The data will be int aligned. */
+ lenp = (u_int32_t*) *pkt;
+ *pkt += sizeof(*lenp);
+ slen = ntohl(*lenp);
+ plen = (slen + 3) & ~3;
+
+ if (slen > *len_p)
+ slen = *len_p;
+ datap = *pkt;
+ *pkt += plen;
+ bcopy(datap, str, slen);
+
+ str[slen] = '\0';
+ *len_p = slen;
+
+ return (0);
+}
+
+
+int
+xdr_inaddr_encode(pkt, ia)
+ char **pkt;
+ struct in_addr ia; /* network order */
+{
+ struct xdr_inaddr *xi;
+ u_char *cp;
+ int32_t *ip;
+ union {
+ n_long l; /* network order */
+ u_char c[4];
+ } uia;
+
+ /* The data will be int aligned. */
+ xi = (struct xdr_inaddr *) *pkt;
+ *pkt += sizeof(*xi);
+ xi->atype = htonl(1);
+ uia.l = ia.s_addr;
+ cp = uia.c;
+ ip = xi->addr;
+ /*
+ * Note: the htonl() calls below DO NOT
+ * imply that uia.l is in host order.
+ * In fact this needs it in net order.
+ */
+ *ip++ = htonl((unsigned int)*cp++);
+ *ip++ = htonl((unsigned int)*cp++);
+ *ip++ = htonl((unsigned int)*cp++);
+ *ip++ = htonl((unsigned int)*cp++);
+
+ return (0);
+}
+
+int
+xdr_inaddr_decode(pkt, ia)
+ char **pkt;
+ struct in_addr *ia; /* network order */
+{
+ struct xdr_inaddr *xi;
+ u_char *cp;
+ int32_t *ip;
+ union {
+ n_long l; /* network order */
+ u_char c[4];
+ } uia;
+
+ /* The data will be int aligned. */
+ xi = (struct xdr_inaddr *) *pkt;
+ *pkt += sizeof(*xi);
+ if (xi->atype != htonl(1)) {
+ RPC_PRINTF(("xdr_inaddr_decode: bad addrtype=%d\n",
+ ntohl(xi->atype)));
+ return(-1);
+ }
+
+ cp = uia.c;
+ ip = xi->addr;
+ /*
+ * Note: the ntohl() calls below DO NOT
+ * imply that uia.l is in host order.
+ * In fact this needs it in net order.
+ */
+ *cp++ = ntohl(*ip++);
+ *cp++ = ntohl(*ip++);
+ *cp++ = ntohl(*ip++);
+ *cp++ = ntohl(*ip++);
+ ia->s_addr = uia.l;
+
+ return (0);
+}
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