1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright (c) 2001 by Sun Microsystems, Inc. 24*0Sstevel@tonic-gate * All rights reserved. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #ident "%Z%%M% %I% %E% SMI" /* SunOS */ 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #include <stdio.h> 30*0Sstevel@tonic-gate #include <ctype.h> 31*0Sstevel@tonic-gate #include <string.h> 32*0Sstevel@tonic-gate #include <fcntl.h> 33*0Sstevel@tonic-gate #include <string.h> 34*0Sstevel@tonic-gate #include <sys/types.h> 35*0Sstevel@tonic-gate #include <sys/time.h> 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate #include <sys/socket.h> 38*0Sstevel@tonic-gate #include <sys/sockio.h> 39*0Sstevel@tonic-gate #include <net/if.h> 40*0Sstevel@tonic-gate #include <netinet/in_systm.h> 41*0Sstevel@tonic-gate #include <netinet/in.h> 42*0Sstevel@tonic-gate #include <netinet/ip.h> 43*0Sstevel@tonic-gate #include <netinet/if_ether.h> 44*0Sstevel@tonic-gate #include <netinet/udp.h> 45*0Sstevel@tonic-gate #include "snoop.h" 46*0Sstevel@tonic-gate 47*0Sstevel@tonic-gate extern char *dlc_header; 48*0Sstevel@tonic-gate 49*0Sstevel@tonic-gate interpret_udp(flags, udp, iplen, fraglen) 50*0Sstevel@tonic-gate int flags; 51*0Sstevel@tonic-gate struct udphdr *udp; 52*0Sstevel@tonic-gate int iplen, fraglen; 53*0Sstevel@tonic-gate { 54*0Sstevel@tonic-gate char *data; 55*0Sstevel@tonic-gate int udplen; 56*0Sstevel@tonic-gate int sunrpc; 57*0Sstevel@tonic-gate char *pname; 58*0Sstevel@tonic-gate char buff [32]; 59*0Sstevel@tonic-gate 60*0Sstevel@tonic-gate if (fraglen < sizeof (struct udphdr)) 61*0Sstevel@tonic-gate return (fraglen); /* incomplete header */ 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate data = (char *)udp + sizeof (struct udphdr); 64*0Sstevel@tonic-gate udplen = ntohs((u_short)udp->uh_ulen) - sizeof (struct udphdr); 65*0Sstevel@tonic-gate fraglen -= sizeof (struct udphdr); 66*0Sstevel@tonic-gate if (fraglen > udplen) 67*0Sstevel@tonic-gate fraglen = udplen; 68*0Sstevel@tonic-gate 69*0Sstevel@tonic-gate if (flags & F_SUM) { 70*0Sstevel@tonic-gate (void) sprintf(get_sum_line(), 71*0Sstevel@tonic-gate "UDP D=%d S=%d LEN=%d", 72*0Sstevel@tonic-gate ntohs(udp->uh_dport), 73*0Sstevel@tonic-gate ntohs(udp->uh_sport), 74*0Sstevel@tonic-gate ntohs((u_short)udp->uh_ulen)); 75*0Sstevel@tonic-gate } 76*0Sstevel@tonic-gate 77*0Sstevel@tonic-gate sunrpc = !reservedport(IPPROTO_UDP, ntohs(udp->uh_dport)) && 78*0Sstevel@tonic-gate !reservedport(IPPROTO_UDP, ntohs(udp->uh_sport)) && 79*0Sstevel@tonic-gate valid_rpc(data, udplen); 80*0Sstevel@tonic-gate 81*0Sstevel@tonic-gate if (flags & F_DTAIL) { 82*0Sstevel@tonic-gate show_header("UDP: ", "UDP Header", udplen); 83*0Sstevel@tonic-gate show_space(); 84*0Sstevel@tonic-gate (void) sprintf(get_line((char *)udp->uh_sport - dlc_header, 1), 85*0Sstevel@tonic-gate "Source port = %d", 86*0Sstevel@tonic-gate ntohs(udp->uh_sport)); 87*0Sstevel@tonic-gate 88*0Sstevel@tonic-gate if (sunrpc) { 89*0Sstevel@tonic-gate pname = "(Sun RPC)"; 90*0Sstevel@tonic-gate } else { 91*0Sstevel@tonic-gate pname = getportname(IPPROTO_UDP, ntohs(udp->uh_dport)); 92*0Sstevel@tonic-gate if (pname == NULL) { 93*0Sstevel@tonic-gate pname = ""; 94*0Sstevel@tonic-gate } else { 95*0Sstevel@tonic-gate (void) sprintf(buff, "(%s)", pname); 96*0Sstevel@tonic-gate pname = buff; 97*0Sstevel@tonic-gate } 98*0Sstevel@tonic-gate } 99*0Sstevel@tonic-gate (void) sprintf(get_line((char *)udp->uh_dport - dlc_header, 1), 100*0Sstevel@tonic-gate "Destination port = %d %s", 101*0Sstevel@tonic-gate ntohs(udp->uh_dport), pname); 102*0Sstevel@tonic-gate (void) sprintf(get_line((char *)udp->uh_ulen - dlc_header, 1), 103*0Sstevel@tonic-gate "Length = %d %s", 104*0Sstevel@tonic-gate ntohs((u_short)udp->uh_ulen), 105*0Sstevel@tonic-gate udplen > fraglen ? 106*0Sstevel@tonic-gate "(Not all data contained in this fragment)" 107*0Sstevel@tonic-gate : ""); 108*0Sstevel@tonic-gate (void) sprintf( 109*0Sstevel@tonic-gate get_line((char *)udp->uh_sum - dlc_header, 1), 110*0Sstevel@tonic-gate "Checksum = %04X %s", 111*0Sstevel@tonic-gate ntohs(udp->uh_sum), 112*0Sstevel@tonic-gate udp->uh_sum == 0 ? "(no checksum)" : ""); 113*0Sstevel@tonic-gate show_space(); 114*0Sstevel@tonic-gate } 115*0Sstevel@tonic-gate 116*0Sstevel@tonic-gate 117*0Sstevel@tonic-gate /* go to the next protocol layer */ 118*0Sstevel@tonic-gate 119*0Sstevel@tonic-gate if (!interpret_reserved(flags, IPPROTO_UDP, 120*0Sstevel@tonic-gate ntohs(udp->uh_sport), 121*0Sstevel@tonic-gate ntohs(udp->uh_dport), 122*0Sstevel@tonic-gate data, fraglen)) { 123*0Sstevel@tonic-gate if (fraglen > 0 && sunrpc) 124*0Sstevel@tonic-gate interpret_rpc(flags, data, fraglen, IPPROTO_UDP); 125*0Sstevel@tonic-gate } 126*0Sstevel@tonic-gate 127*0Sstevel@tonic-gate return (fraglen); 128*0Sstevel@tonic-gate } 129