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📄 Makefile(5.67 KB)
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📄 abort.c(1.42 KB)
📁 amd64
📄 arp.c(7.51 KB)
📄 assert.c(1.71 KB)
📄 bcd.c(1.48 KB)
📄 bootp.c(19.71 KB)
📄 bootp.h(4.58 KB)
📄 bootparam.c(9.78 KB)
📄 bootparam.h(180 B)
📄 bzipfs.c(9.92 KB)
📄 cd9660.c(15.37 KB)
📄 cd9660read.c(9.08 KB)
📄 close.c(3.37 KB)
📄 closeall.c(3 KB)
📄 crc32_libkern.c(58 B)
📄 dev.c(1.92 KB)
📄 dosfs.c(22.02 KB)
📄 dosfs.h(4.68 KB)
📄 environment.c(5.3 KB)
📄 ether.c(4.02 KB)
📄 ext2fs.c(23.7 KB)
📄 fstat.c(2.07 KB)
📁 geli
📄 getopt.c(3.46 KB)
📄 gets.c(2.88 KB)
📄 globals.c(1.11 KB)
📄 gpt.c(10.85 KB)
📄 gpt.h(1.62 KB)
📄 gzipfs.c(8.95 KB)
📄 hexdump.c(2.36 KB)
📁 i386
📄 in_cksum.c(2.94 KB)
📄 inet_ntoa.c(2.35 KB)
📄 ioctl.c(3.19 KB)
📄 iodesc.h(2.26 KB)
📄 ip.c(10.5 KB)
📄 libsa.3(14.32 KB)
📄 lseek.c(4.58 KB)
📁 mips
📄 net.c(6.84 KB)
📄 net.h(4.23 KB)
📄 netif.c(7.26 KB)
📄 netif.h(1.49 KB)
📄 nfs.c(18.2 KB)
📄 nfsv2.h(3.67 KB)
📄 nullfs.c(3.44 KB)
📄 open.c(4.43 KB)
📄 pager.c(3.61 KB)
📄 panic.c(2.26 KB)
📄 pkgfs.c(17.54 KB)
📁 powerpc
📄 printf.c(11.96 KB)
📄 random.c(2.3 KB)
📄 rarp.c(5.42 KB)
📄 read.c(4.45 KB)
📄 readdir.c(1.8 KB)
📄 rpc.c(10.08 KB)
📄 rpc.h(2.61 KB)
📄 rpcv2.h(2.86 KB)
📄 saioctl.h(2.59 KB)
📄 sbrk.c(2.06 KB)
📄 smbios.c(13.81 KB)
📄 smbios.h(1.48 KB)
📄 splitfs.c(7.59 KB)
📄 stand.h(15.61 KB)
📄 stat.c(1.89 KB)
📄 strcasecmp.c(2.36 KB)
📄 strdup.c(2.02 KB)
📄 strerror.c(3.04 KB)
📄 tftp.c(17.16 KB)
📄 tftp.h(1.76 KB)
📄 time.c(1.49 KB)
📄 twiddle.c(2.4 KB)
📄 udp.c(4.62 KB)
📄 ufs.c(19.98 KB)
📄 ufsread.c(8.73 KB)
📄 uuid_from_string.c(3.88 KB)
📄 uuid_to_string.c(3.25 KB)
📄 write.c(3.44 KB)
📁 x86
📄 xlocale_private.h(1.52 KB)
📄 zalloc.c(9.15 KB)
📄 zalloc_defs.h(2.57 KB)
📄 zalloc_malloc.c(5.3 KB)
📄 zalloc_mem.h(1.84 KB)
📄 zalloc_protos.h(1.79 KB)
📁 zfs

Editing: udp.c

/* 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. 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)
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#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(struct iodesc *d, void *pkt, size_t len)
{
	ssize_t cc;
	struct udpiphdr *ui;
	struct udphdr *uh;

#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

ui = (struct udpiphdr *)pkt - 1;
	bzero(ui, sizeof(*ui));

uh = (struct udphdr *)pkt - 1;
	len += sizeof(*uh);

uh->uh_sport = d->myport;
	uh->uh_dport = d->destport;
	uh->uh_ulen = htons(len);

ui->ui_pr = IPPROTO_UDP;
	ui->ui_len = uh->uh_ulen;
	ui->ui_src = d->myip;
	ui->ui_dst = d->destip;

#ifndef UDP_NO_CKSUM
	uh->uh_sum = in_cksum(ui, len + sizeof (struct ip));
#endif

cc = sendip(d, uh, len, IPPROTO_UDP);
	if (cc == -1)
		return (-1);
	if (cc != len)
		panic("sendudp: bad write (%zd != %zd)", cc, len);
	return (cc - sizeof(*uh));
}

/*
 * Receive a UDP packet and validate it is for us.
 */
ssize_t
readudp(struct iodesc *d, void **pkt, void **payload, time_t tleft)
{
	ssize_t n;
	struct udphdr *uh;
	void *ptr;

#ifdef NET_DEBUG
	if (debug)
		printf("readudp: called\n");
#endif

uh = NULL;
	ptr = NULL;
	n = readip(d, &ptr, (void **)&uh, tleft, IPPROTO_UDP);
	if (n == -1 || n < sizeof(*uh) || n != ntohs(uh->uh_ulen)) {
		free(ptr);
		return (-1);
	}

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
		free(ptr);
		return (-1);
	}

#ifndef UDP_NO_CKSUM
	if (uh->uh_sum) {
		struct udpiphdr *ui;
		struct ip *ip;
		struct ip tip;

n = ntohs(uh->uh_ulen) + sizeof(*ip);

/* Check checksum (must save and restore ip header) */
		ip = (struct ip *)uh - 1;
		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
			free(ptr);
			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
		free(ptr);
		return (-1);
	}

n = (n > (ntohs(uh->uh_ulen) - sizeof(*uh))) ? 
	    ntohs(uh->uh_ulen) - sizeof(*uh) : n;
	*pkt = ptr;
	*payload = (void *)((uintptr_t)uh + sizeof(*uh));
	return (n);
}

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Editing: udp.c

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