#ifndef lint
static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-icmp.c,v 1.39 1999-10-17 21:37:12 mcr Exp $ (LBL)";
+ "@(#) $Header: /tcpdump/master/tcpdump/print-icmp.c,v 1.46 2000-05-15 00:59:41 assar Exp $ (LBL)";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
#endif
#include <sys/param.h>
#endif
#include <net/if.h>
-#define __FAVOR_BSD
-
#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 <stdio.h>
};
void
-icmp_print(register const u_char *bp, register const u_char *bp2)
+icmp_print(register const u_char *bp, u_int plen, register const u_char *bp2)
{
register char *cp;
register const struct icmp *dp;
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_UNREACH_PROTOCOL:
TCHECK(dp->icmp_ip.ip_p);
- (void)sprintf(buf, "%s protocol %d unreachable",
- ipaddr_string(&dp->icmp_ip.ip_dst),
- dp->icmp_ip.ip_p);
+ (void)snprintf(buf, sizeof(buf),
+ "%s protocol %d unreachable",
+ ipaddr_string(&dp->icmp_ip.ip_dst),
+ dp->icmp_ip.ip_p);
break;
case ICMP_UNREACH_PORT:
switch (oip->ip_p) {
case IPPROTO_TCP:
- (void)sprintf(buf,
+ (void)snprintf(buf, sizeof(buf),
"%s tcp port %s unreachable",
ipaddr_string(&oip->ip_dst),
tcpport_string(dport));
break;
case IPPROTO_UDP:
- (void)sprintf(buf,
+ (void)snprintf(buf, sizeof(buf),
"%s udp port %s unreachable",
ipaddr_string(&oip->ip_dst),
udpport_string(dport));
break;
default:
- (void)sprintf(buf,
+ (void)snprintf(buf, sizeof(buf),
"%s protocol %d port %d unreachable",
ipaddr_string(&oip->ip_dst),
oip->ip_p, dport);
break;
case ICMP_UNREACH_NEEDFRAG:
- {
+ {
register const struct mtu_discovery *mp;
-
mp = (struct mtu_discovery *)&dp->icmp_void;
mtu = EXTRACT_16BITS(&mp->nexthopmtu);
- if (mtu)
- (void)sprintf(buf,
- "%s unreachable - need to frag (mtu %d)",
- ipaddr_string(&dp->icmp_ip.ip_dst), mtu);
- else
- (void)sprintf(buf,
- "%s unreachable - need to frag",
- ipaddr_string(&dp->icmp_ip.ip_dst));
+ if (mtu) {
+ (void)snprintf(buf, sizeof(buf),
+ "%s unreachable - need to frag (mtu %d)",
+ ipaddr_string(&dp->icmp_ip.ip_dst), mtu);
+ } else {
+ (void)snprintf(buf, sizeof(buf),
+ "%s unreachable - need to frag",
+ ipaddr_string(&dp->icmp_ip.ip_dst));
}
+ }
break;
default:
fmt = tok2str(unreach2str, "#%d %%s unreachable",
dp->icmp_code);
- (void)sprintf(buf, fmt,
+ (void)snprintf(buf, sizeof(buf), fmt,
ipaddr_string(&dp->icmp_ip.ip_dst));
break;
}
TCHECK(dp->icmp_ip.ip_dst);
fmt = tok2str(type2str, "redirect-#%d %%s to net %%s",
dp->icmp_code);
- (void)sprintf(buf, fmt,
+ (void)snprintf(buf, sizeof(buf), fmt,
ipaddr_string(&dp->icmp_ip.ip_dst),
ipaddr_string(&dp->icmp_gwaddr));
break;
case ICMP_ROUTERADVERT:
- {
+ {
register const struct ih_rdiscovery *ihp;
register const struct id_rdiscovery *idp;
u_int lifetime, num, size;
- (void)strcpy(buf, "router advertisement");
+ (void)snprintf(buf, sizeof(buf), "router advertisement");
cp = buf + strlen(buf);
ihp = (struct ih_rdiscovery *)&dp->icmp_void;
TCHECK(*ihp);
- (void)strcpy(cp, " lifetime ");
+ (void)strncpy(cp, " lifetime ", sizeof(buf) - (cp - buf));
cp = buf + strlen(buf);
lifetime = EXTRACT_16BITS(&ihp->ird_lifetime);
- if (lifetime < 60)
- (void)sprintf(cp, "%u", lifetime);
- else if (lifetime < 60 * 60)
- (void)sprintf(cp, "%u:%02u",
+ if (lifetime < 60) {
+ (void)snprintf(cp, sizeof(buf) - (cp - buf), "%u",
+ lifetime);
+ } else if (lifetime < 60 * 60) {
+ (void)snprintf(cp, sizeof(buf) - (cp - buf), "%u:%02u",
lifetime / 60, lifetime % 60);
- else
- (void)sprintf(cp, "%u:%02u:%02u",
+ } else {
+ (void)snprintf(cp, sizeof(buf) - (cp - buf),
+ "%u:%02u:%02u",
lifetime / 3600,
(lifetime % 3600) / 60,
lifetime % 60);
+ }
cp = buf + strlen(buf);
num = ihp->ird_addrnum;
- (void)sprintf(cp, " %d:", num);
+ (void)snprintf(cp, sizeof(buf) - (cp - buf), " %d:", num);
cp = buf + strlen(buf);
size = ihp->ird_addrsiz;
if (size != 2) {
- (void)sprintf(cp, " [size %d]", size);
+ (void)snprintf(cp, sizeof(buf) - (cp - buf),
+ " [size %d]", size);
break;
}
idp = (struct id_rdiscovery *)&dp->icmp_data;
while (num-- > 0) {
TCHECK(*idp);
- (void)sprintf(cp, " {%s %u}",
+ (void)snprintf(cp, sizeof(buf) - (cp - buf), " {%s %u}",
ipaddr_string(&idp->ird_addr),
EXTRACT_32BITS(&idp->ird_pref));
cp = buf + strlen(buf);
+ ++idp;
}
- }
+ }
break;
case ICMP_TIMXCEED:
break;
default:
- (void)sprintf(buf, "time exceeded-#%d", dp->icmp_code);
+ (void)snprintf(buf, sizeof(buf), "time exceeded-#%d",
+ dp->icmp_code);
break;
}
break;
case ICMP_PARAMPROB:
if (dp->icmp_code)
- (void)sprintf(buf, "parameter problem - code %d",
- dp->icmp_code);
+ (void)snprintf(buf, sizeof(buf),
+ "parameter problem - code %d", dp->icmp_code);
else {
TCHECK(dp->icmp_pptr);
- (void)sprintf(buf, "parameter problem - octet %d",
- dp->icmp_pptr);
+ (void)snprintf(buf, sizeof(buf),
+ "parameter problem - octet %d", dp->icmp_pptr);
}
break;
case ICMP_MASKREPLY:
TCHECK(dp->icmp_mask);
- (void)sprintf(buf, "address mask is 0x%08x",
+ (void)snprintf(buf, sizeof(buf), "address mask is 0x%08x",
(u_int32_t)ntohl(dp->icmp_mask));
break;
break;
}
(void)printf("icmp: %s", str);
+ if (vflag) {
+ if (TTEST2(*bp, plen)) {
+ if (in_cksum((u_short*)dp, plen, 0))
+ printf(" (wrong icmp csum)");
+ }
+ }
+ 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));
+ }
return;
trunc:
fputs("[|icmp]", stdout);
projects / tcpdump / blobdiff