*/
#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-icmp.c,v 1.54 2000-10-03 02:54:58 itojun Exp $ (LBL)";
+static const char rcsid[] _U_ =
+ "@(#) $Header: /tcpdump/master/tcpdump/print-icmp.c,v 1.73.2.3 2004-03-24 00:56:34 guy Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/socket.h>
-
-struct mbuf;
-struct rtentry;
-
-#include <netinet/in.h>
+#include <tcpdump-stdinc.h>
#include <stdio.h>
#include <string.h>
#include "ip.h"
#include "udp.h"
+#include "ipproto.h"
/*
* Interface Control Message Protocol Definitions.
* Structure of an icmp header.
*/
struct icmp {
- u_char icmp_type; /* type of message, see below */
- u_char icmp_code; /* type sub code */
- u_short icmp_cksum; /* ones complement cksum of struct */
+ u_int8_t icmp_type; /* type of message, see below */
+ u_int8_t icmp_code; /* type sub code */
+ u_int16_t icmp_cksum; /* ones complement cksum of struct */
union {
- u_char ih_pptr; /* ICMP_PARAMPROB */
+ u_int8_t ih_pptr; /* ICMP_PARAMPROB */
struct in_addr ih_gwaddr; /* ICMP_REDIRECT */
struct ih_idseq {
- u_short icd_id;
- u_short icd_seq;
+ u_int16_t icd_id;
+ u_int16_t icd_seq;
} ih_idseq;
- int ih_void;
+ u_int32_t ih_void;
/* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
struct ih_pmtu {
- u_short ipm_void;
- u_short ipm_nextmtu;
+ u_int16_t ipm_void;
+ u_int16_t ipm_nextmtu;
} ih_pmtu;
} icmp_hun;
#define icmp_pptr icmp_hun.ih_pptr
#define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
union {
struct id_ts {
- u_int its_otime;
- u_int its_rtime;
- u_int its_ttime;
+ u_int32_t its_otime;
+ u_int32_t its_rtime;
+ u_int32_t its_ttime;
} id_ts;
struct id_ip {
struct ip idi_ip;
/* options and then 64 bits of data */
} id_ip;
- u_int id_mask;
- char id_data[1];
+ u_int32_t id_mask;
+ u_int8_t id_data[1];
} icmp_dun;
#define icmp_otime icmp_dun.id_ts.its_otime
#define icmp_rtime icmp_dun.id_ts.its_rtime
* ip header length.
*/
#define ICMP_MINLEN 8 /* abs minimum */
-#define ICMP_TSLEN (8 + 3 * sizeof (u_int)) /* timestamp */
+#define ICMP_TSLEN (8 + 3 * sizeof (u_int32_t)) /* timestamp */
#define ICMP_MASKLEN 12 /* address mask */
#define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */
#define ICMP_ADVLEN(p) (8 + (IP_HL(&(p)->icmp_ip) << 2) + 8)
{ ICMP_REDIRECT_NET, "redirect %s to net %s" },
{ ICMP_REDIRECT_HOST, "redirect %s to host %s" },
{ ICMP_REDIRECT_TOSNET, "redirect-tos %s to net %s" },
- { ICMP_REDIRECT_TOSHOST, "redirect-tos %s to net %s" },
+ { ICMP_REDIRECT_TOSHOST, "redirect-tos %s to host %s" },
{ 0, NULL }
};
/* rfc1191 */
struct mtu_discovery {
- short unused;
- short nexthopmtu;
+ u_int16_t unused;
+ u_int16_t nexthopmtu;
};
/* rfc1256 */
struct ih_rdiscovery {
- u_char ird_addrnum;
- u_char ird_addrsiz;
- u_short ird_lifetime;
+ u_int8_t ird_addrnum;
+ u_int8_t ird_addrsiz;
+ u_int16_t ird_lifetime;
};
struct id_rdiscovery {
};
void
-icmp_print(register const u_char *bp, u_int plen, register const u_char *bp2)
+icmp_print(const u_char *bp, u_int plen, const u_char *bp2, int fragmented)
{
- register char *cp;
- register const struct icmp *dp;
- register const struct ip *ip;
- register const char *str, *fmt;
- register const struct ip *oip;
- register const struct udphdr *ouh;
- register u_int hlen, dport, mtu;
- char buf[256];
+ char *cp;
+ const struct icmp *dp;
+ const struct ip *ip;
+ const char *str, *fmt;
+ const struct ip *oip;
+ const struct udphdr *ouh;
+ u_int hlen, dport, mtu;
+ char buf[MAXHOSTNAMELEN + 100];
dp = (struct icmp *)bp;
ip = (struct ip *)bp2;
str = buf;
-#if 0
- (void)printf("%s > %s: ",
- ipaddr_string(&ip->ip_src),
- ipaddr_string(&ip->ip_dst));
-#endif
-
TCHECK(dp->icmp_code);
switch (dp->icmp_type) {
+ case ICMP_ECHO:
+ case ICMP_ECHOREPLY:
+ TCHECK(dp->icmp_seq);
+ (void)snprintf(buf, sizeof(buf), "echo %s seq %u",
+ dp->icmp_type == ICMP_ECHO ?
+ "request" : "reply",
+ EXTRACT_16BITS(&dp->icmp_seq));
+ break;
+
case ICMP_UNREACH:
TCHECK(dp->icmp_ip.ip_dst);
switch (dp->icmp_code) {
oip = &dp->icmp_ip;
hlen = IP_HL(oip) * 4;
ouh = (struct udphdr *)(((u_char *)oip) + hlen);
- dport = ntohs(ouh->uh_dport);
+ TCHECK(ouh->uh_dport);
+ dport = EXTRACT_16BITS(&ouh->uh_dport);
switch (oip->ip_p) {
case IPPROTO_TCP:
{
register const struct mtu_discovery *mp;
mp = (struct mtu_discovery *)&dp->icmp_void;
- mtu = EXTRACT_16BITS(&mp->nexthopmtu);
- if (mtu) {
+ mtu = EXTRACT_16BITS(&mp->nexthopmtu);
+ if (mtu) {
(void)snprintf(buf, sizeof(buf),
"%s unreachable - need to frag (mtu %d)",
ipaddr_string(&dp->icmp_ip.ip_dst), mtu);
- } else {
+ } else {
(void)snprintf(buf, sizeof(buf),
"%s unreachable - need to frag",
ipaddr_string(&dp->icmp_ip.ip_dst));
case ICMP_MASKREPLY:
TCHECK(dp->icmp_mask);
(void)snprintf(buf, sizeof(buf), "address mask is 0x%08x",
- (unsigned)ntohl(dp->icmp_mask));
+ EXTRACT_32BITS(&dp->icmp_mask));
break;
case ICMP_TSTAMP:
TCHECK(dp->icmp_seq);
- (void)sprintf(buf, "time stamp query id %u seq %u",
- (unsigned)ntohs(dp->icmp_id),
- (unsigned)ntohs(dp->icmp_seq));
+ (void)snprintf(buf, sizeof(buf),
+ "time stamp query id %u seq %u",
+ EXTRACT_16BITS(&dp->icmp_id),
+ EXTRACT_16BITS(&dp->icmp_seq));
break;
case ICMP_TSTAMPREPLY:
TCHECK(dp->icmp_ttime);
- (void)sprintf(buf, "time stamp reply id %u seq %u : org 0x%lx recv 0x%lx xmit 0x%lx",
- (unsigned)ntohs(dp->icmp_id),
- (unsigned)ntohs(dp->icmp_seq),
- (unsigned long)ntohl(dp->icmp_otime),
- (unsigned long)ntohl(dp->icmp_rtime),
- (unsigned long)ntohl(dp->icmp_ttime));
+ (void)snprintf(buf, sizeof(buf),
+ "time stamp reply id %u seq %u : org 0x%x recv 0x%x xmit 0x%x",
+ EXTRACT_16BITS(&dp->icmp_id),
+ EXTRACT_16BITS(&dp->icmp_seq),
+ EXTRACT_32BITS(&dp->icmp_otime),
+ EXTRACT_32BITS(&dp->icmp_rtime),
+ EXTRACT_32BITS(&dp->icmp_ttime));
break;
default:
str = tok2str(icmp2str, "type-#%d", dp->icmp_type);
break;
}
- (void)printf("icmp: %s", str);
- if (vflag) {
+ (void)printf("icmp %d: %s", plen, str);
+ if (vflag && !fragmented) { /* don't attempt checksumming if this is a frag */
+ u_int16_t sum, icmp_sum;
if (TTEST2(*bp, plen)) {
- if (in_cksum((u_short*)dp, plen, 0))
- printf(" (wrong icmp csum)");
+ sum = in_cksum((u_short*)dp, plen, 0);
+ if (sum != 0) {
+ icmp_sum = EXTRACT_16BITS(&dp->icmp_cksum);
+ (void)printf(" (wrong icmp cksum %x (->%x)!)",
+ icmp_sum,
+ in_cksum_shouldbe(icmp_sum, sum));
+ }
}
}
- if (vflag > 1 && !ICMP_INFOTYPE(dp->icmp_type)) {
- bp += 8;
- (void)printf(" for ");
- ip = (struct ip *)bp;
- snaplen = snapend - bp;
- ip_print(bp, ntohs(ip->ip_len));
- }
+ if (vflag > 1 && !ICMP_INFOTYPE(dp->icmp_type)) {
+ bp += 8;
+ (void)printf(" for ");
+ ip = (struct ip *)bp;
+ snaplen = snapend - bp;
+ ip_print(bp, EXTRACT_16BITS(&ip->ip_len));
+ }
return;
trunc:
fputs("[|icmp]", stdout);
projects / tcpdump / blobdiff