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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <fcntl.h>
#include <string.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <net/if.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/if_ether.h>
#include <netinet/udp.h>
#include "snoop.h"
extern char *dlc_header;
int
interpret_udp(int flags, struct udphdr *udp, int iplen, int fraglen)
{
char *data;
int udplen;
int sunrpc;
char *pname;
char buff [32];
if (fraglen < sizeof (struct udphdr))
return (fraglen); /* incomplete header */
data = (char *)udp + sizeof (struct udphdr);
udplen = ntohs((ushort_t)udp->uh_ulen) - sizeof (struct udphdr);
fraglen -= sizeof (struct udphdr);
if (fraglen > udplen)
fraglen = udplen;
if (flags & F_SUM) {
(void) sprintf(get_sum_line(),
"UDP D=%d S=%d LEN=%d",
ntohs(udp->uh_dport),
ntohs(udp->uh_sport),
ntohs((ushort_t)udp->uh_ulen));
}
sunrpc = !reservedport(IPPROTO_UDP, ntohs(udp->uh_dport)) &&
!reservedport(IPPROTO_UDP, ntohs(udp->uh_sport)) &&
valid_rpc(data, udplen);
if (flags & F_DTAIL) {
show_header("UDP: ", "UDP Header", udplen);
show_space();
(void) sprintf(get_line((char *)(uintptr_t)udp->uh_sport -
dlc_header, 1), "Source port = %d", ntohs(udp->uh_sport));
if (sunrpc) {
pname = "(Sun RPC)";
} else {
pname = getportname(IPPROTO_UDP, ntohs(udp->uh_dport));
if (pname == NULL) {
pname = "";
} else {
(void) sprintf(buff, "(%s)", pname);
pname = buff;
}
}
(void) sprintf(get_line((char *)(uintptr_t)udp->uh_dport -
dlc_header, 1), "Destination port = %d %s",
ntohs(udp->uh_dport), pname);
(void) sprintf(get_line((char *)(uintptr_t)udp->uh_ulen -
dlc_header, 1), "Length = %d %s",
ntohs((ushort_t)udp->uh_ulen),
udplen > fraglen ?
"(Not all data contained in this fragment)"
: "");
(void) sprintf(get_line((char *)(uintptr_t)udp->uh_sum -
dlc_header, 1), "Checksum = %04X %s",
ntohs(udp->uh_sum),
udp->uh_sum == 0 ? "(no checksum)" : "");
show_space();
}
/* go to the next protocol layer */
if (!interpret_reserved(flags, IPPROTO_UDP,
ntohs(udp->uh_sport),
ntohs(udp->uh_dport),
data, fraglen)) {
if (fraglen > 0 && sunrpc)
interpret_rpc(flags, data, fraglen, IPPROTO_UDP);
}
return (fraglen);
}
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