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- /*
- * Copyright (c) 1988-1990 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 1.11 91/03/27 17:42:58 leres Exp $ (LBL)";
- #endif
-
- #include <stdio.h>
-
- #include <sys/param.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_var.h>
- #include <netinet/udp.h>
- #include <netinet/udp_var.h>
- #include <netinet/tcp.h>
- #include <netinet/tcpip.h>
-
- #include <netinet/ip_icmp.h>
-
- #include "interface.h"
- #include "addrtoname.h"
-
- void
- icmp_print(dp, ip)
- register struct icmp *dp;
- register struct ip *ip;
- {
- char buf[256];
- register char *str = buf;
- register struct ip *oip;
- register struct udphdr *ouh;
- register int hlen;
- u_char *ep;
-
- #define TCHECK(var, l) if ((u_char *)&(var) > ep - l) goto trunc
-
- /* 'ep' points to the end of avaible data. */
- ep = (u_char *)snapend;
-
- (void)printf("%s > %s: ",
- ipaddr_string(&ip->ip_src),
- ipaddr_string(&ip->ip_dst));
- strcpy(str, "[?]");
-
- 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);
- 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(ouh->uh_dport));
- break;
- case IPPROTO_UDP:
- (void)sprintf(buf,
- "%s udp port %s unreachable",
- ipaddr_string(&oip->ip_dst),
- udpport_string(ouh->uh_dport));
- break;
- default:
- (void)sprintf(buf,
- "%s protocol %d port %d unreachable",
- ipaddr_string(&oip->ip_dst),
- oip->ip_p, ouh->uh_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", dp->icmp_mask);
- break;
- }
- (void)printf("icmp: %s", str);
- return;
- trunc:
- fputs("[|icmp]", stdout);
- #undef TCHECK
- }
-