Break out sendudp and readudp from net.c. This is for PXE, so it

can use its own UDP interface.

4 files changed, 276 insertions, 215 deletions

diff --git a/lib/libstand/Makefile b/lib/libstand/Makefile
index 3e2aef4..dd24884 100644
--- a/lib/libstand/Makefile
+++ b/lib/libstand/Makefile
@@ -107,7 +107,7 @@ SRCS+=	closeall.c dev.c ioctl.c nullfs.c stat.c \
 	fstat.c close.c lseek.c open.c read.c write.c
 
 # network routines
-SRCS+=	arp.c ether.c in_cksum.c net.c netif.c rpc.c
+SRCS+=	arp.c ether.c in_cksum.c net.c udp.c netif.c rpc.c
 
 # network info services:
 SRCS+=	bootp.c rarp.c bootparam.c
diff --git a/lib/libstand/net.c b/lib/libstand/net.c
index 978bd70..b01c3c6 100644
--- a/lib/libstand/net.c
+++ b/lib/libstand/net.c
@@ -37,6 +37,7 @@
  * SUCH DAMAGE.
  *
  * @(#) Header: net.c,v 1.9 93/08/06 19:32:15 leres Exp  (LBL)
+ *	$FreeBSD$
  */
 
 #include <sys/param.h>
@@ -57,219 +58,6 @@
 #include "stand.h"
 #include "net.h"
 
-/* Caller must leave room for ethernet, ip and udp headers in front!! */
-ssize_t
-sendudp(d, pkt, len)
-	register struct iodesc *d;
-	register void *pkt;
-	register size_t len;
-{
-	register ssize_t cc;
-	register struct ip *ip;
-	register struct udphdr *uh;
-	register u_char *ea;
-
-#ifdef NET_DEBUG
- 	if (debug) {
-		printf("sendudp: d=%lx called.\n", (long)d);
-		if (d) {
-			printf("saddr: %s:%d",
-			    inet_ntoa(d->myip), ntohs(d->myport));
-			printf(" daddr: %s:%d\n",
-			    inet_ntoa(d->destip), ntohs(d->destport));
-		}
-	}
-#endif
-
-	uh = (struct udphdr *)pkt - 1;
-	ip = (struct ip *)uh - 1;
-	len += sizeof(*ip) + sizeof(*uh);
-
-	bzero(ip, sizeof(*ip) + sizeof(*uh));
-
-	ip->ip_v = IPVERSION;			/* half-char */
-	ip->ip_hl = sizeof(*ip) >> 2;		/* half-char */
-	ip->ip_len = htons(len);
-	ip->ip_p = IPPROTO_UDP;			/* char */
-	ip->ip_ttl = IP_TTL;			/* char */
-	ip->ip_src = d->myip;
-	ip->ip_dst = d->destip;
-	ip->ip_sum = in_cksum(ip, sizeof(*ip));	 /* short, but special */
-
-	uh->uh_sport = d->myport;
-	uh->uh_dport = d->destport;
-	uh->uh_ulen = htons(len - sizeof(*ip));
-
-#ifndef UDP_NO_CKSUM
-	{
-		register struct udpiphdr *ui;
-		struct ip tip;
-
-		/* Calculate checksum (must save and restore ip header) */
-		tip = *ip;
-		ui = (struct udpiphdr *)ip;
-		bzero(&ui->ui_x1, sizeof(ui->ui_x1));
-		ui->ui_len = uh->uh_ulen;
-		uh->uh_sum = in_cksum(ui, len);
-		*ip = tip;
-	}
-#endif
-
-	if (ip->ip_dst.s_addr == INADDR_BROADCAST || ip->ip_src.s_addr == 0 ||
-	    netmask == 0 || SAMENET(ip->ip_src, ip->ip_dst, netmask))
-		ea = arpwhohas(d, ip->ip_dst);
-	else
-		ea = arpwhohas(d, gateip);
-
-	cc = sendether(d, ip, len, ea, ETHERTYPE_IP);
-	if (cc == -1)
-		return (-1);
-	if (cc != len)
-		panic("sendudp: bad write (%d != %d)", cc, len);
-	return (cc - (sizeof(*ip) + sizeof(*uh)));
-}
-
-/*
- * Receive a UDP packet and validate it is for us.
- * Caller leaves room for the headers (Ether, IP, UDP)
- */
-ssize_t
-readudp(d, pkt, len, tleft)
-	register struct iodesc *d;
-	register void *pkt;
-	register size_t len;
-	time_t tleft;
-{
-	register ssize_t n;
-	register size_t hlen;
-	register struct ip *ip;
-	register struct udphdr *uh;
-	u_int16_t etype;	/* host order */
-
-#ifdef NET_DEBUG
-	if (debug)
-		printf("readudp: called\n");
-#endif
-
-	uh = (struct udphdr *)pkt - 1;
-	ip = (struct ip *)uh - 1;
-
-	n = readether(d, ip, len + sizeof(*ip) + sizeof(*uh), tleft, &etype);
-	if (n == -1 || n < sizeof(*ip) + sizeof(*uh))
-		return -1;
-
-	/* Ethernet address checks now in readether() */
-
-	/* Need to respond to ARP requests. */
-	if (etype == ETHERTYPE_ARP) {
-		struct arphdr *ah = (void *)ip;
-		if (ah->ar_op == htons(ARPOP_REQUEST)) {
-			/* Send ARP reply */
-			arp_reply(d, ah);
-		}
-		return -1;
-	}
-
-	if (etype != ETHERTYPE_IP) {
-#ifdef NET_DEBUG
-		if (debug)
-			printf("readudp: not IP. ether_type=%x\n", etype);
-#endif
-		return -1;
-	}
-
-	/* Check ip header */
-	if (ip->ip_v != IPVERSION ||
-	    ip->ip_p != IPPROTO_UDP) {	/* half char */
-#ifdef NET_DEBUG
-		if (debug)
-			printf("readudp: IP version or not UDP. ip_v=%d ip_p=%d\n", ip->ip_v, ip->ip_p);
-#endif
-		return -1;
-	}
-
-	hlen = ip->ip_hl << 2;
-	if (hlen < sizeof(*ip) ||
-	    in_cksum(ip, hlen) != 0) {
-#ifdef NET_DEBUG
-		if (debug)
-			printf("readudp: short hdr or bad cksum.\n");
-#endif
-		return -1;
-	}
-	if (n < ntohs(ip->ip_len)) {
-#ifdef NET_DEBUG
-		if (debug)
-			printf("readudp: bad length %d < %d.\n",
-			       (int)n, ntohs(ip->ip_len));
-#endif
-		return -1;
-	}
-	if (d->myip.s_addr && ip->ip_dst.s_addr != d->myip.s_addr) {
-#ifdef NET_DEBUG
-		if (debug) {
-			printf("readudp: bad saddr %s != ", inet_ntoa(d->myip));
-			printf("%s\n", inet_ntoa(ip->ip_dst));
-		}
-#endif
-		return -1;
-	}
-
-	/* If there were ip options, make them go away */
-	if (hlen != sizeof(*ip)) {
-		bcopy(((u_char *)ip) + hlen, uh, len - hlen);
-		ip->ip_len = htons(sizeof(*ip));
-		n -= hlen - sizeof(*ip);
-	}
-	if (uh->uh_dport != d->myport) {
-#ifdef NET_DEBUG
-		if (debug)
-			printf("readudp: bad dport %d != %d\n",
-				d->myport, ntohs(uh->uh_dport));
-#endif
-		return -1;
-	}
-
-#ifndef UDP_NO_CKSUM
-	if (uh->uh_sum) {
-		register struct udpiphdr *ui;
-		struct ip tip;
-
-		n = ntohs(uh->uh_ulen) + sizeof(*ip);
-		if (n > RECV_SIZE - ETHER_SIZE) {
-			printf("readudp: huge packet, udp len %d\n", (int)n);
-			return -1;
-		}
-
-		/* Check checksum (must save and restore ip header) */
-		tip = *ip;
-		ui = (struct udpiphdr *)ip;
-		bzero(&ui->ui_x1, sizeof(ui->ui_x1));
-		ui->ui_len = uh->uh_ulen;
-		if (in_cksum(ui, n) != 0) {
-#ifdef NET_DEBUG
-			if (debug)
-				printf("readudp: bad cksum\n");
-#endif
-			*ip = tip;
-			return -1;
-		}
-		*ip = tip;
-	}
-#endif
-	if (ntohs(uh->uh_ulen) < sizeof(*uh)) {
-#ifdef NET_DEBUG
-		if (debug)
-			printf("readudp: bad udp len %d < %d\n",
-				ntohs(uh->uh_ulen), (int)sizeof(*uh));
-#endif
-		return -1;
-	}
-
-	n -= sizeof(*ip) + sizeof(*uh);
-	return (n);
-}
-
 /*
  * Send a packet and wait for a reply, with exponential backoff.
  *
diff --git a/lib/libstand/tftp.c b/lib/libstand/tftp.c
index a6695e9..63d32d9 100644
--- a/lib/libstand/tftp.c
+++ b/lib/libstand/tftp.c
@@ -30,6 +30,7 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
+ * $FreeBSD$
  */
 
 /*
@@ -375,7 +376,7 @@ tftp_stat(f, sb)
 	struct tftp_handle *tftpfile;
 	tftpfile = (struct tftp_handle *) f->f_fsdata;
 
-	sb->st_mode = 0444;
+	sb->st_mode = 0444 | S_IFREG;
 	sb->st_nlink = 1;
 	sb->st_uid = 0;
 	sb->st_gid = 0;
diff --git a/lib/libstand/udp.c b/lib/libstand/udp.c
new file mode 100644
index 0000000..e5992ef
--- /dev/null
+++ b/lib/libstand/udp.c
@@ -0,0 +1,272 @@
+/* Taken from $NetBSD: net.c,v 1.20 1997/12/26 22:41:30 scottr 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: net.c,v 1.9 93/08/06 19:32:15 leres Exp  (LBL)
+ *	$FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/socket.h>
+
+#include <string.h>
+
+#include <net/if.h>
+#include <netinet/in.h>
+#include <netinet/if_ether.h>
+#include <netinet/in_systm.h>
+
+#include <netinet/ip.h>
+#include <netinet/ip_var.h>
+#include <netinet/udp.h>
+#include <netinet/udp_var.h>
+
+#include "stand.h"
+#include "net.h"
+
+/* Caller must leave room for ethernet, ip and udp headers in front!! */
+ssize_t
+sendudp(d, pkt, len)
+	register struct iodesc *d;
+	register void *pkt;
+	register size_t len;
+{
+	register ssize_t cc;
+	register struct ip *ip;
+	register struct udphdr *uh;
+	register u_char *ea;
+
+#ifdef NET_DEBUG
+ 	if (debug) {
+		printf("sendudp: d=%lx called.\n", (long)d);
+		if (d) {
+			printf("saddr: %s:%d",
+			    inet_ntoa(d->myip), ntohs(d->myport));
+			printf(" daddr: %s:%d\n",
+			    inet_ntoa(d->destip), ntohs(d->destport));
+		}
+	}
+#endif
+
+	uh = (struct udphdr *)pkt - 1;
+	ip = (struct ip *)uh - 1;
+	len += sizeof(*ip) + sizeof(*uh);
+
+	bzero(ip, sizeof(*ip) + sizeof(*uh));
+
+	ip->ip_v = IPVERSION;			/* half-char */
+	ip->ip_hl = sizeof(*ip) >> 2;		/* half-char */
+	ip->ip_len = htons(len);
+	ip->ip_p = IPPROTO_UDP;			/* char */
+	ip->ip_ttl = IP_TTL;			/* char */
+	ip->ip_src = d->myip;
+	ip->ip_dst = d->destip;
+	ip->ip_sum = in_cksum(ip, sizeof(*ip));	 /* short, but special */
+
+	uh->uh_sport = d->myport;
+	uh->uh_dport = d->destport;
+	uh->uh_ulen = htons(len - sizeof(*ip));
+
+#ifndef UDP_NO_CKSUM
+	{
+		register struct udpiphdr *ui;
+		struct ip tip;
+
+		/* Calculate checksum (must save and restore ip header) */
+		tip = *ip;
+		ui = (struct udpiphdr *)ip;
+		bzero(&ui->ui_x1, sizeof(ui->ui_x1));
+		ui->ui_len = uh->uh_ulen;
+		uh->uh_sum = in_cksum(ui, len);
+		*ip = tip;
+	}
+#endif
+
+	if (ip->ip_dst.s_addr == INADDR_BROADCAST || ip->ip_src.s_addr == 0 ||
+	    netmask == 0 || SAMENET(ip->ip_src, ip->ip_dst, netmask))
+		ea = arpwhohas(d, ip->ip_dst);
+	else
+		ea = arpwhohas(d, gateip);
+
+	cc = sendether(d, ip, len, ea, ETHERTYPE_IP);
+	if (cc == -1)
+		return (-1);
+	if (cc != len)
+		panic("sendudp: bad write (%d != %d)", cc, len);
+	return (cc - (sizeof(*ip) + sizeof(*uh)));
+}
+
+/*
+ * Receive a UDP packet and validate it is for us.
+ * Caller leaves room for the headers (Ether, IP, UDP)
+ */
+ssize_t
+readudp(d, pkt, len, tleft)
+	register struct iodesc *d;
+	register void *pkt;
+	register size_t len;
+	time_t tleft;
+{
+	register ssize_t n;
+	register size_t hlen;
+	register struct ip *ip;
+	register struct udphdr *uh;
+	u_int16_t etype;	/* host order */
+
+#ifdef NET_DEBUG
+	if (debug)
+		printf("readudp: called\n");
+#endif
+
+	uh = (struct udphdr *)pkt - 1;
+	ip = (struct ip *)uh - 1;
+
+	n = readether(d, ip, len + sizeof(*ip) + sizeof(*uh), tleft, &etype);
+	if (n == -1 || n < sizeof(*ip) + sizeof(*uh))
+		return -1;
+
+	/* Ethernet address checks now in readether() */
+
+	/* Need to respond to ARP requests. */
+	if (etype == ETHERTYPE_ARP) {
+		struct arphdr *ah = (void *)ip;
+		if (ah->ar_op == htons(ARPOP_REQUEST)) {
+			/* Send ARP reply */
+			arp_reply(d, ah);
+		}
+		return -1;
+	}
+
+	if (etype != ETHERTYPE_IP) {
+#ifdef NET_DEBUG
+		if (debug)
+			printf("readudp: not IP. ether_type=%x\n", etype);
+#endif
+		return -1;
+	}
+
+	/* Check ip header */
+	if (ip->ip_v != IPVERSION ||
+	    ip->ip_p != IPPROTO_UDP) {	/* half char */
+#ifdef NET_DEBUG
+		if (debug)
+			printf("readudp: IP version or not UDP. ip_v=%d ip_p=%d\n", ip->ip_v, ip->ip_p);
+#endif
+		return -1;
+	}
+
+	hlen = ip->ip_hl << 2;
+	if (hlen < sizeof(*ip) ||
+	    in_cksum(ip, hlen) != 0) {
+#ifdef NET_DEBUG
+		if (debug)
+			printf("readudp: short hdr or bad cksum.\n");
+#endif
+		return -1;
+	}
+	if (n < ntohs(ip->ip_len)) {
+#ifdef NET_DEBUG
+		if (debug)
+			printf("readudp: bad length %d < %d.\n",
+			       (int)n, ntohs(ip->ip_len));
+#endif
+		return -1;
+	}
+	if (d->myip.s_addr && ip->ip_dst.s_addr != d->myip.s_addr) {
+#ifdef NET_DEBUG
+		if (debug) {
+			printf("readudp: bad saddr %s != ", inet_ntoa(d->myip));
+			printf("%s\n", inet_ntoa(ip->ip_dst));
+		}
+#endif
+		return -1;
+	}
+
+	/* If there were ip options, make them go away */
+	if (hlen != sizeof(*ip)) {
+		bcopy(((u_char *)ip) + hlen, uh, len - hlen);
+		ip->ip_len = htons(sizeof(*ip));
+		n -= hlen - sizeof(*ip);
+	}
+	if (uh->uh_dport != d->myport) {
+#ifdef NET_DEBUG
+		if (debug)
+			printf("readudp: bad dport %d != %d\n",
+				d->myport, ntohs(uh->uh_dport));
+#endif
+		return -1;
+	}
+
+#ifndef UDP_NO_CKSUM
+	if (uh->uh_sum) {
+		register struct udpiphdr *ui;
+		struct ip tip;
+
+		n = ntohs(uh->uh_ulen) + sizeof(*ip);
+		if (n > RECV_SIZE - ETHER_SIZE) {
+			printf("readudp: huge packet, udp len %d\n", (int)n);
+			return -1;
+		}
+
+		/* Check checksum (must save and restore ip header) */
+		tip = *ip;
+		ui = (struct udpiphdr *)ip;
+		bzero(&ui->ui_x1, sizeof(ui->ui_x1));
+		ui->ui_len = uh->uh_ulen;
+		if (in_cksum(ui, n) != 0) {
+#ifdef NET_DEBUG
+			if (debug)
+				printf("readudp: bad cksum\n");
+#endif
+			*ip = tip;
+			return -1;
+		}
+		*ip = tip;
+	}
+#endif
+	if (ntohs(uh->uh_ulen) < sizeof(*uh)) {
+#ifdef NET_DEBUG
+		if (debug)
+			printf("readudp: bad udp len %d < %d\n",
+				ntohs(uh->uh_ulen), (int)sizeof(*uh));
+#endif
+		return -1;
+	}
+
+	n -= sizeof(*ip) + sizeof(*uh);
+	return (n);
+}