/* * 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: /usr/staff/martinh/tcpview/RCS/print-icmp.c,v 1.2 1993/04/22 20:30:28 martinh Exp $ (LBL)"; #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ip_icmp.h" #ifdef TCPVIEW #include "tcpview.h" #endif #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; u_short dport; #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); 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_DISC_AD: TCHECK(dp->icmp_num, sizeof(dp->icmp_num)); TCHECK(dp->icmp_lifetime, sizeof(dp->icmp_lifetime)); TCHECK(dp->icmp_adv, sizeof(dp->icmp_adv)); (void)sprintf(buf, "disc. adv.: [num = %d, lifetime = %d] %s/%d...", dp->icmp_num, ntohs(dp->icmp_lifetime), inet_ntoa(dp->icmp_adv[0].addr), ntohl(dp->icmp_adv[0].preference)); break; case ICMP_DISC_SOLICIT: str = "disc. solicit."; 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 }