Date: 19 Jan 2000 14:56:10 +0100 From: Dag-Erling Smorgrav <des@flood.ping.uio.no> To: hackers@freebsd.org, security@freebsd.org Subject: New option to ping(8): dump packet contents Message-ID: <xzpd7qymah1.fsf@flood.ping.uio.no>
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[-- Attachment #1 --]
DES
--
Dag-Erling Smorgrav - des@flood.ping.uio.no
[-- Attachment #2 --]
Index: ping.c
===================================================================
RCS file: /home/ncvs/src/sbin/ping/ping.c,v
retrieving revision 1.49
diff -u -r1.49 ping.c
--- ping.c 2000/01/14 23:40:38 1.49
+++ ping.c 2000/01/19 13:48:53
@@ -133,6 +133,7 @@
#define F_POLICY 0x4000
#endif /*IPSEC_POLICY_IPSEC*/
#endif /*IPSEC*/
+#define F_DUMP 0x8000
/*
* MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
@@ -234,10 +235,10 @@
datap = &outpack[8 + PHDR_LEN];
#ifndef IPSEC
- while ((ch = getopt(argc, argv, "I:LQRT:c:adfi:l:np:qrs:t:v")) != -1)
+ while ((ch = getopt(argc, argv, "I:LQRT:c:adDfi:l:np:qrs:t:v")) != -1)
#else
#ifdef IPSEC_POLICY_IPSEC
- while ((ch = getopt(argc, argv, "I:LQRT:c:adfi:l:np:qrs:t:vP:")) != -1)
+ while ((ch = getopt(argc, argv, "I:LQRT:c:adDfi:l:np:qrs:t:vP:")) != -1)
#endif /*IPSEC_POLICY_IPSEC*/
#endif
{
@@ -256,6 +257,9 @@
case 'd':
options |= F_SO_DEBUG;
break;
+ case 'D':
+ options |= F_DUMP;
+ break;
case 'f':
if (uid) {
errno = EPERM;
@@ -837,7 +841,13 @@
cp = (u_char*)&icp->icmp_data[PHDR_LEN];
dp = &outpack[8 + PHDR_LEN];
for (i = PHDR_LEN; i < datalen; ++i, ++cp, ++dp) {
- if (*cp != *dp) {
+ if (options & F_DUMP) {
+ if ((i - PHDR_LEN) % 16 == 8)
+ putchar(' ');
+ if ((i - PHDR_LEN) % 16 == 0)
+ putchar('\n');
+ printf(" %02x", *dp);
+ } else if (*cp != *dp) {
(void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x",
i, *dp, *cp);
printf("\ncp:");
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