initial import of NetBSD tree

1 files changed, 341 insertions, 0 deletions

diff --git a/sys/lib/libsa/bootp.c b/sys/lib/libsa/bootp.c
new file mode 100644
index 00000000000..5caab25c236
--- /dev/null
+++ b/sys/lib/libsa/bootp.c
@@ -0,0 +1,341 @@
+/*	$NetBSD: bootp.c,v 1.7 1995/09/18 21:19:20 pk Exp $	*/
+
+/*
+ * Copyright (c) 1992 Regents of the University of California.
+ * All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Lawrence Berkeley Laboratory and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
+ *
+ * @(#) Header: bootp.c,v 1.4 93/09/11 03:13:51 leres Exp  (LBL)
+ */
+
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+
+#include <string.h>
+
+#include "stand.h"
+#include "net.h"
+#include "netif.h"
+#include "bootp.h"
+
+static n_long	nmask, smask;
+
+static time_t	bot;
+
+static	char vm_rfc1048[4] = VM_RFC1048;
+static	char vm_cmu[4] = VM_CMU;
+
+/* Local forwards */
+static	ssize_t bootpsend __P((struct iodesc *, void *, size_t));
+static	ssize_t bootprecv __P((struct iodesc *, void *, size_t, time_t));
+static	void vend_cmu __P((u_char *));
+static	void vend_rfc1048 __P((u_char *, u_int));
+
+/* Fetch required bootp infomation */
+void
+bootp(sock)
+	int sock;
+{
+	struct iodesc *d;
+	register struct bootp *bp;
+	struct {
+		u_char header[HEADER_SIZE];
+		struct bootp wbootp;
+	} wbuf;
+	struct {
+		u_char header[HEADER_SIZE];
+		struct bootp rbootp;
+	} rbuf;
+
+#ifdef BOOTP_DEBUG
+ 	if (debug)
+		printf("bootp: socket=%d\n", sock);
+#endif
+	if (!bot)
+		bot = getsecs();
+	
+	if (!(d = socktodesc(sock))) {
+		printf("bootp: bad socket. %d\n", sock);
+		return;
+	}
+#ifdef BOOTP_DEBUG
+ 	if (debug)
+		printf("bootp: d=%x\n", (u_int)d);
+#endif
+
+	bp = &wbuf.wbootp;
+	bzero(bp, sizeof(*bp));
+
+	bp->bp_op = BOOTREQUEST;
+	bp->bp_htype = 1;		/* 10Mb Ethernet (48 bits) */
+	bp->bp_hlen = 6;
+	bp->bp_xid = htonl(d->xid);
+	MACPY(d->myea, bp->bp_chaddr);
+	bzero(bp->bp_file, sizeof(bp->bp_file));
+	bcopy(vm_rfc1048, bp->bp_vend, sizeof(vm_rfc1048));
+
+	d->myip = myip;
+	d->myport = htons(IPPORT_BOOTPC);
+	d->destip.s_addr = INADDR_BROADCAST;
+	d->destport = htons(IPPORT_BOOTPS);
+
+	(void)sendrecv(d,
+	    bootpsend, bp, sizeof(*bp),
+	    bootprecv, &rbuf.rbootp, sizeof(rbuf.rbootp));
+
+	/* Bump xid so next request will be unique. */
+	++d->xid;
+}
+
+/* Transmit a bootp request */
+static ssize_t
+bootpsend(d, pkt, len)
+	register struct iodesc *d;
+	register void *pkt;
+	register size_t len;
+{
+	register struct bootp *bp;
+
+#ifdef BOOTP_DEBUG
+	if (debug)
+		printf("bootpsend: d=%x called.\n", (u_int)d);
+#endif
+
+	bp = pkt;
+	bp->bp_secs = htons((u_short)(getsecs() - bot));
+
+#ifdef BOOTP_DEBUG
+	if (debug)
+		printf("bootpsend: calling sendudp\n");
+#endif
+
+	return (sendudp(d, pkt, len));
+}
+
+/* Returns 0 if this is the packet we're waiting for else -1 (and errno == 0) */
+static ssize_t
+bootprecv(d, pkt, len, tleft)
+	register struct iodesc *d;
+	register void *pkt;
+	register size_t len;
+	time_t tleft;
+{
+	register ssize_t n;
+	register struct bootp *bp;
+
+#ifdef BOOTP_DEBUG
+	if (debug)
+		printf("bootprecv: called\n");
+#endif
+
+	n = readudp(d, pkt, len, tleft);
+	if (n == -1 || n < sizeof(struct bootp))
+		goto bad;
+
+	bp = (struct bootp *)pkt;
+
+#ifdef BOOTP_DEBUG
+	if (debug)
+		printf("bootprecv: checked.  bp = 0x%x, n = %d\n",
+		    (unsigned)bp, n);
+#endif
+	if (bp->bp_xid != htonl(d->xid)) {
+#ifdef BOOTP_DEBUG
+		if (debug) {
+			printf("bootprecv: expected xid 0x%x, got 0x%x\n",
+			    d->xid, ntohl(bp->bp_xid));
+		}
+#endif
+		goto bad;
+	}
+
+#ifdef BOOTP_DEBUG
+	if (debug)
+		printf("bootprecv: got one!\n");
+#endif
+
+	/* Pick up our ip address (and natural netmask) */
+	myip = d->myip = bp->bp_yiaddr;
+#ifdef BOOTP_DEBUG
+	if (debug)
+		printf("our ip address is %s\n", inet_ntoa(d->myip));
+#endif
+	if (IN_CLASSA(d->myip.s_addr))
+		nmask = IN_CLASSA_NET;
+	else if (IN_CLASSB(d->myip.s_addr))
+		nmask = IN_CLASSB_NET;
+	else
+		nmask = IN_CLASSC_NET;
+#ifdef BOOTP_DEBUG
+	if (debug)
+		printf("'native netmask' is %s\n", intoa(nmask));
+#endif
+
+	/* Pick up root or swap server address and file spec. */
+	if (bp->bp_siaddr.s_addr != 0)
+		rootip = bp->bp_siaddr;
+	if (bp->bp_file[0] != '\0') {
+		strncpy(bootfile, (char *)bp->bp_file, sizeof(bootfile));
+		bootfile[sizeof(bootfile) - 1] = '\0';
+	}
+
+	/* Suck out vendor info */
+	if (bcmp(vm_cmu, bp->bp_vend, sizeof(vm_cmu)) == 0)
+		vend_cmu(bp->bp_vend);
+	else if (bcmp(vm_rfc1048, bp->bp_vend, sizeof(vm_rfc1048)) == 0)
+		vend_rfc1048(bp->bp_vend, sizeof(bp->bp_vend));
+	else
+		printf("bootprecv: unknown vendor 0x%lx\n", (long)bp->bp_vend);
+
+	/* Check subnet mask against net mask; toss if bogus */
+	if ((nmask & smask) != nmask) {
+#ifdef BOOTP_DEBUG
+		if (debug)
+			printf("subnet mask (%s) bad\n", intoa(smask));
+#endif
+		smask = 0;
+	}
+
+	/* Get subnet (or natural net) mask */
+	netmask = nmask;
+	if (smask)
+		netmask = smask;
+#ifdef BOOTP_DEBUG
+	if (debug)
+		printf("mask: %s\n", intoa(netmask));
+#endif
+
+	/* We need a gateway if root or swap is on a different net */
+	if (!SAMENET(d->myip, rootip, netmask)) {
+#ifdef BOOTP_DEBUG
+		if (debug)
+			printf("need gateway for root ip\n");
+#endif
+	}
+
+	if (!SAMENET(d->myip, swapip, netmask)) {
+#ifdef BOOTP_DEBUG
+		if (debug)
+			printf("need gateway for swap ip\n");
+#endif
+	}
+
+	/* Toss gateway if on a different net */
+	if (!SAMENET(d->myip, gateip, netmask)) {
+#ifdef BOOTP_DEBUG
+		if (debug)
+			printf("gateway ip (%s) bad\n", inet_ntoa(gateip));
+#endif
+		gateip.s_addr = 0;
+	}
+
+	return (n);
+
+bad:
+	errno = 0;
+	return (-1);
+}
+
+static void
+vend_cmu(cp)
+	u_char *cp;
+{
+	register struct cmu_vend *vp;
+
+#ifdef BOOTP_DEBUG
+	if (debug)
+		printf("vend_cmu bootp info.\n");
+#endif
+	vp = (struct cmu_vend *)cp;
+
+	if (vp->v_smask.s_addr != 0) {
+		smask = vp->v_smask.s_addr;
+	}
+	if (vp->v_dgate.s_addr != 0) {
+		gateip = vp->v_dgate;
+	}
+}
+
+static void
+vend_rfc1048(cp, len)
+	register u_char *cp;
+	u_int len;
+{
+	register u_char *ep;
+	register int size;
+	register u_char tag;
+
+#ifdef BOOTP_DEBUG
+	if (debug)
+		printf("vend_rfc1048 bootp info. len=%d\n", len);
+#endif
+	ep = cp + len;
+
+	/* Step over magic cookie */
+	cp += sizeof(long);
+
+	while (cp < ep) {
+		tag = *cp++;
+		size = *cp++;
+		if (tag == TAG_END)
+			break;
+
+		if (tag == TAG_SUBNET_MASK) {
+			bcopy(cp, &smask, sizeof(smask));
+		}
+		if (tag == TAG_GATEWAY) {
+			bcopy(cp, &gateip.s_addr, sizeof(gateip.s_addr));
+		}
+		if (tag == TAG_SWAPSERVER) {
+			bcopy(cp, &swapip.s_addr, sizeof(swapip.s_addr));
+		}
+		if (tag == TAG_DOMAIN_SERVER) {
+			bcopy(cp, &nameip.s_addr, sizeof(nameip.s_addr));
+		}
+		if (tag == TAG_ROOTPATH) {
+			strncpy(rootpath, (char *)cp, sizeof(rootpath));
+			rootpath[size] = '\0';
+		}
+		if (tag == TAG_HOSTNAME) {
+			strncpy(hostname, (char *)cp, sizeof(hostname));
+			hostname[size] = '\0';
+		}
+		if (tag == TAG_DOMAINNAME) {
+			strncpy(domainname, (char *)cp, sizeof(domainname));
+			domainname[size] = '\0';
+		}
+		cp += size;
+	}
+}