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/* $NetBSD: print-icmp.c,v 1.3 1995/03/06 19:11:13 mycroft Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char rcsid[] =
"@(#) Header: print-icmp.c,v 1.20 94/06/14 20:17:39 leres Exp (LBL)";
#endif
#include <sys/param.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.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_icmp.h>
#include <netinet/ip_var.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <netinet/tcp.h>
#include <netinet/tcpip.h>
#include <stdio.h>
#include "interface.h"
#include "addrtoname.h"
void
icmp_print(register const u_char *bp, register const u_char *bp2)
{
register const struct icmp *dp;
register const struct ip *ip;
register const char *str;
register const struct ip *oip;
register const struct udphdr *ouh;
register int hlen, dport;
register const u_char *ep;
char buf[256];
#define TCHECK(var, l) if ((u_char *)&(var) > ep - l) goto trunc
dp = (struct icmp *)bp;
ip = (struct ip *)bp2;
str = buf;
/* 'ep' points to the end of avaible data. */
ep = snapend;
(void)printf("%s > %s: ",
ipaddr_string(&ip->ip_src),
ipaddr_string(&ip->ip_dst));
TCHECK(dp->icmp_code, sizeof(dp->icmp_code));
switch (dp->icmp_type) {
case ICMP_ECHOREPLY:
str = "echo reply";
break;
case ICMP_UNREACH:
TCHECK(dp->icmp_ip.ip_dst, sizeof(dp->icmp_ip.ip_dst));
switch (dp->icmp_code) {
case ICMP_UNREACH_NET:
(void)sprintf(buf, "net %s unreachable",
ipaddr_string(&dp->icmp_ip.ip_dst));
break;
case ICMP_UNREACH_HOST:
(void)sprintf(buf, "host %s unreachable",
ipaddr_string(&dp->icmp_ip.ip_dst));
break;
case ICMP_UNREACH_PROTOCOL:
TCHECK(dp->icmp_ip.ip_p, sizeof(dp->icmp_ip.ip_p));
(void)sprintf(buf, "%s protocol %d unreachable",
ipaddr_string(&dp->icmp_ip.ip_dst),
dp->icmp_ip.ip_p);
break;
case ICMP_UNREACH_PORT:
TCHECK(dp->icmp_ip.ip_p, sizeof(dp->icmp_ip.ip_p));
oip = &dp->icmp_ip;
hlen = oip->ip_hl * 4;
ouh = (struct udphdr *)(((u_char *)oip) + hlen);
dport = ntohs(ouh->uh_dport);
switch (oip->ip_p) {
case IPPROTO_TCP:
(void)sprintf(buf,
"%s tcp port %s unreachable",
ipaddr_string(&oip->ip_dst),
tcpport_string(dport));
break;
case IPPROTO_UDP:
(void)sprintf(buf,
"%s udp port %s unreachable",
ipaddr_string(&oip->ip_dst),
udpport_string(dport));
break;
default:
(void)sprintf(buf,
"%s protocol %d port %d unreachable",
ipaddr_string(&oip->ip_dst),
oip->ip_p, dport);
break;
}
break;
case ICMP_UNREACH_NEEDFRAG:
(void)sprintf(buf, "%s unreachable - need to frag",
ipaddr_string(&dp->icmp_ip.ip_dst));
break;
case ICMP_UNREACH_SRCFAIL:
(void)sprintf(buf,
"%s unreachable - source route failed",
ipaddr_string(&dp->icmp_ip.ip_dst));
break;
}
break;
case ICMP_SOURCEQUENCH:
str = "source quench";
break;
case ICMP_REDIRECT:
TCHECK(dp->icmp_ip.ip_dst, sizeof(dp->icmp_ip.ip_dst));
switch (dp->icmp_code) {
case ICMP_REDIRECT_NET:
(void)sprintf(buf, "redirect %s to net %s",
ipaddr_string(&dp->icmp_ip.ip_dst),
ipaddr_string(&dp->icmp_gwaddr));
break;
case ICMP_REDIRECT_HOST:
(void)sprintf(buf, "redirect %s to host %s",
ipaddr_string(&dp->icmp_ip.ip_dst),
ipaddr_string(&dp->icmp_gwaddr));
break;
case ICMP_REDIRECT_TOSNET:
(void)sprintf(buf, "redirect-tos %s to net %s",
ipaddr_string(&dp->icmp_ip.ip_dst),
ipaddr_string(&dp->icmp_gwaddr));
break;
case ICMP_REDIRECT_TOSHOST:
(void)sprintf(buf, "redirect-tos %s to host %s",
ipaddr_string(&dp->icmp_ip.ip_dst),
ipaddr_string(&dp->icmp_gwaddr));
break;
}
break;
case ICMP_ECHO:
str = "echo request";
break;
case ICMP_TIMXCEED:
TCHECK(dp->icmp_ip.ip_dst, sizeof(dp->icmp_ip.ip_dst));
switch (dp->icmp_code) {
case ICMP_TIMXCEED_INTRANS:
str = "time exceeded in-transit";
break;
case ICMP_TIMXCEED_REASS:
str = "ip reassembly time exceeded";
break;
}
break;
case ICMP_PARAMPROB:
if (dp->icmp_code)
(void)sprintf(buf, "parameter problem - code %d",
dp->icmp_code);
else {
TCHECK(dp->icmp_pptr, sizeof(dp->icmp_pptr));
(void)sprintf(buf, "parameter problem - octet %d",
dp->icmp_pptr);
}
break;
case ICMP_TSTAMP:
str = "time stamp request";
break;
case ICMP_TSTAMPREPLY:
str = "time stamp reply";
break;
case ICMP_IREQ:
str = "information request";
break;
case ICMP_IREQREPLY:
str = "information reply";
break;
case ICMP_MASKREQ:
str = "address mask request";
break;
case ICMP_MASKREPLY:
TCHECK(dp->icmp_mask, sizeof(dp->icmp_mask));
(void)sprintf(buf, "address mask is 0x%08x",
ntohl(dp->icmp_mask));
break;
default:
(void)sprintf(buf, "type-#%d", dp->icmp_type);
break;
}
(void)printf("icmp: %s", str);
return;
trunc:
fputs("[|icmp]", stdout);
#undef TCHECK
}
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