218 lines
6.1 KiB
C
218 lines
6.1 KiB
C
/* $NetBSD: print-icmp.c,v 1.3 1995/03/06 19:11:13 mycroft Exp $ */
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/*
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* Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#ifndef lint
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static char rcsid[] =
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"@(#) Header: print-icmp.c,v 1.20 94/06/14 20:17:39 leres Exp (LBL)";
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#endif
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/ip_icmp.h>
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#include <netinet/ip_var.h>
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#include <netinet/udp.h>
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#include <netinet/udp_var.h>
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#include <netinet/tcp.h>
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#include <netinet/tcpip.h>
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#include <stdio.h>
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#include "interface.h"
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#include "addrtoname.h"
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void
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icmp_print(register const u_char *bp, register const u_char *bp2)
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{
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register const struct icmp *dp;
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register const struct ip *ip;
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register const char *str;
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register const struct ip *oip;
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register const struct udphdr *ouh;
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register int hlen, dport;
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register const u_char *ep;
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char buf[256];
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#define TCHECK(var, l) if ((u_char *)&(var) > ep - l) goto trunc
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dp = (struct icmp *)bp;
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ip = (struct ip *)bp2;
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str = buf;
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/* 'ep' points to the end of avaible data. */
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ep = snapend;
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(void)printf("%s > %s: ",
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ipaddr_string(&ip->ip_src),
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ipaddr_string(&ip->ip_dst));
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TCHECK(dp->icmp_code, sizeof(dp->icmp_code));
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switch (dp->icmp_type) {
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case ICMP_ECHOREPLY:
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str = "echo reply";
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break;
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case ICMP_UNREACH:
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TCHECK(dp->icmp_ip.ip_dst, sizeof(dp->icmp_ip.ip_dst));
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switch (dp->icmp_code) {
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case ICMP_UNREACH_NET:
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(void)sprintf(buf, "net %s unreachable",
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ipaddr_string(&dp->icmp_ip.ip_dst));
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break;
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case ICMP_UNREACH_HOST:
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(void)sprintf(buf, "host %s unreachable",
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ipaddr_string(&dp->icmp_ip.ip_dst));
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break;
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case ICMP_UNREACH_PROTOCOL:
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TCHECK(dp->icmp_ip.ip_p, sizeof(dp->icmp_ip.ip_p));
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(void)sprintf(buf, "%s protocol %d unreachable",
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ipaddr_string(&dp->icmp_ip.ip_dst),
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dp->icmp_ip.ip_p);
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break;
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case ICMP_UNREACH_PORT:
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TCHECK(dp->icmp_ip.ip_p, sizeof(dp->icmp_ip.ip_p));
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oip = &dp->icmp_ip;
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hlen = oip->ip_hl * 4;
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ouh = (struct udphdr *)(((u_char *)oip) + hlen);
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dport = ntohs(ouh->uh_dport);
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switch (oip->ip_p) {
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case IPPROTO_TCP:
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(void)sprintf(buf,
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"%s tcp port %s unreachable",
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ipaddr_string(&oip->ip_dst),
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tcpport_string(dport));
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break;
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case IPPROTO_UDP:
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(void)sprintf(buf,
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"%s udp port %s unreachable",
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ipaddr_string(&oip->ip_dst),
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udpport_string(dport));
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break;
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default:
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(void)sprintf(buf,
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"%s protocol %d port %d unreachable",
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ipaddr_string(&oip->ip_dst),
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oip->ip_p, dport);
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break;
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}
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break;
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case ICMP_UNREACH_NEEDFRAG:
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(void)sprintf(buf, "%s unreachable - need to frag",
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ipaddr_string(&dp->icmp_ip.ip_dst));
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break;
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case ICMP_UNREACH_SRCFAIL:
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(void)sprintf(buf,
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"%s unreachable - source route failed",
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ipaddr_string(&dp->icmp_ip.ip_dst));
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break;
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}
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break;
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case ICMP_SOURCEQUENCH:
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str = "source quench";
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break;
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case ICMP_REDIRECT:
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TCHECK(dp->icmp_ip.ip_dst, sizeof(dp->icmp_ip.ip_dst));
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switch (dp->icmp_code) {
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case ICMP_REDIRECT_NET:
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(void)sprintf(buf, "redirect %s to net %s",
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ipaddr_string(&dp->icmp_ip.ip_dst),
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ipaddr_string(&dp->icmp_gwaddr));
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break;
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case ICMP_REDIRECT_HOST:
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(void)sprintf(buf, "redirect %s to host %s",
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ipaddr_string(&dp->icmp_ip.ip_dst),
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ipaddr_string(&dp->icmp_gwaddr));
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break;
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case ICMP_REDIRECT_TOSNET:
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(void)sprintf(buf, "redirect-tos %s to net %s",
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ipaddr_string(&dp->icmp_ip.ip_dst),
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ipaddr_string(&dp->icmp_gwaddr));
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break;
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case ICMP_REDIRECT_TOSHOST:
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(void)sprintf(buf, "redirect-tos %s to host %s",
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ipaddr_string(&dp->icmp_ip.ip_dst),
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ipaddr_string(&dp->icmp_gwaddr));
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break;
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}
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break;
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case ICMP_ECHO:
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str = "echo request";
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break;
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case ICMP_TIMXCEED:
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TCHECK(dp->icmp_ip.ip_dst, sizeof(dp->icmp_ip.ip_dst));
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switch (dp->icmp_code) {
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case ICMP_TIMXCEED_INTRANS:
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str = "time exceeded in-transit";
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break;
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case ICMP_TIMXCEED_REASS:
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str = "ip reassembly time exceeded";
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break;
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}
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break;
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case ICMP_PARAMPROB:
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if (dp->icmp_code)
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(void)sprintf(buf, "parameter problem - code %d",
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dp->icmp_code);
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else {
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TCHECK(dp->icmp_pptr, sizeof(dp->icmp_pptr));
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(void)sprintf(buf, "parameter problem - octet %d",
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dp->icmp_pptr);
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}
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break;
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case ICMP_TSTAMP:
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str = "time stamp request";
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break;
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case ICMP_TSTAMPREPLY:
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str = "time stamp reply";
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break;
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case ICMP_IREQ:
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str = "information request";
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break;
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case ICMP_IREQREPLY:
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str = "information reply";
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break;
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case ICMP_MASKREQ:
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str = "address mask request";
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break;
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case ICMP_MASKREPLY:
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TCHECK(dp->icmp_mask, sizeof(dp->icmp_mask));
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(void)sprintf(buf, "address mask is 0x%08x",
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ntohl(dp->icmp_mask));
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break;
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default:
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(void)sprintf(buf, "type-#%d", dp->icmp_type);
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break;
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}
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(void)printf("icmp: %s", str);
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return;
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trunc:
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fputs("[|icmp]", stdout);
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#undef TCHECK
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}
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