#ifndef lint
static const char rcsid[] _U_ =
- "@(#) $Header: /tcpdump/master/tcpdump/print-ip.c,v 1.138 2004-04-28 22:02:23 guy Exp $ (LBL)";
+ "@(#) $Header: /tcpdump/master/tcpdump/print-ip.c,v 1.147 2005-01-21 08:02:06 hannes Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include "ip.h"
#include "ipproto.h"
+struct tok ip_option_values[] = {
+ { IPOPT_EOL, "EOL" },
+ { IPOPT_NOP, "NOP" },
+ { IPOPT_TS, "timestamp" },
+ { IPOPT_SECURITY, "security" },
+ { IPOPT_RR, "RR" },
+ { IPOPT_SSRR, "SSRR" },
+ { IPOPT_LSRR, "LSRR" },
+ { IPOPT_RA, "RA" },
+ { 0, NULL }
+};
+
/*
* print the recorded route in an IP RR, LSRR or SSRR option.
*/
static void
-ip_printroute(const char *type, register const u_char *cp, u_int length)
+ip_printroute(register const u_char *cp, u_int length)
{
register u_int ptr;
register u_int len;
printf(" [bad length %u]", length);
return;
}
- printf(" %s{", type);
if ((length + 1) & 3)
printf(" [bad length %u]", length);
ptr = cp[2] - 1;
if (ptr < 3 || ((ptr + 1) & 3) || ptr > length + 1)
printf(" [bad ptr %u]", cp[2]);
- type = "";
for (len = 3; len < length; len += 4) {
- if (ptr == len)
- type = "#";
- printf("%s%s", type, ipaddr_string(&cp[len]));
- type = " ";
+ printf("%s", ipaddr_string(&cp[len]));
+ if (ptr > len)
+ printf (", ");
}
- printf("%s}", ptr == len? "#" : "");
}
/*
- * If source-routing is present, return the final destination.
+ * If source-routing is present and valid, return the final destination.
* Otherwise, return IP destination.
*
* This is used for UDP and TCP pseudo-header in the checksum
TCHECK(*cp);
tt = *cp;
- if (tt == IPOPT_NOP || tt == IPOPT_EOL)
+ if (tt == IPOPT_EOL)
+ break;
+ else if (tt == IPOPT_NOP)
len = 1;
else {
TCHECK(cp[1]);
len = cp[1];
- }
- if (len < 2) {
- return 0;
+ if (len < 2)
+ break;
}
TCHECK2(*cp, len);
switch (tt) {
case IPOPT_SSRR:
case IPOPT_LSRR:
if (len < 7)
- return 0;
+ break;
memcpy(&retval, cp + len - 4, 4);
return retval;
}
}
- return ip->ip_dst.s_addr;
-
trunc:
- return 0;
+ memcpy(&retval, &ip->ip_dst.s_addr, sizeof(u_int32_t));
+ return retval;
}
static void
static void
ip_optprint(register const u_char *cp, u_int length)
{
- register u_int len;
+ register u_int option_len;
- for (; length > 0; cp += len, length -= len) {
- int tt;
+ for (; length > 0; cp += option_len, length -= option_len) {
+ u_int option_code;
TCHECK(*cp);
- tt = *cp;
- if (tt == IPOPT_NOP || tt == IPOPT_EOL)
- len = 1;
+ option_code = *cp;
+
+ if (option_code == IPOPT_NOP ||
+ option_code == IPOPT_EOL)
+ option_len = 1;
+
else {
TCHECK(cp[1]);
- len = cp[1];
- if (len < 2) {
- printf("[|ip op len %d]", len);
- return;
- }
- TCHECK2(*cp, len);
+ option_len = cp[1];
}
- switch (tt) {
- case IPOPT_EOL:
- printf(" EOL");
- if (length > 1)
- printf("-%d", length - 1);
- return;
+ printf("%s (%u) len %u",
+ tok2str(ip_option_values,"unknown",option_code),
+ option_code,
+ option_len);
- case IPOPT_NOP:
- printf(" NOP");
- break;
+ if (option_len < 2)
+ return;
- case IPOPT_TS:
- ip_printts(cp, len);
- break;
+ TCHECK2(*cp, option_len);
-#ifndef IPOPT_SECURITY
-#define IPOPT_SECURITY 130
-#endif /* IPOPT_SECURITY */
- case IPOPT_SECURITY:
- printf(" SECURITY{%d}", len);
- break;
+ switch (option_code) {
+ case IPOPT_EOL:
+ return;
- case IPOPT_RR:
- ip_printroute("RR", cp, len);
+ case IPOPT_TS:
+ ip_printts(cp, option_len);
break;
+ case IPOPT_RR: /* fall through */
case IPOPT_SSRR:
- ip_printroute("SSRR", cp, len);
- break;
-
case IPOPT_LSRR:
- ip_printroute("LSRR", cp, len);
+ ip_printroute( cp, option_len);
break;
-#ifndef IPOPT_RA
-#define IPOPT_RA 148 /* router alert */
-#endif
case IPOPT_RA:
- printf(" RA");
- if (len != 4)
- printf("{%d}", len);
- else {
- TCHECK(cp[3]);
- if (cp[2] || cp[3])
- printf("%d.%d", cp[2], cp[3]);
- }
+ TCHECK(cp[3]);
+ if (EXTRACT_16BITS(&cp[2]) != 0)
+ printf("value %u", EXTRACT_16BITS(&cp[2]));
break;
+ case IPOPT_NOP: /* nothing to print - fall through */
+ case IPOPT_SECURITY:
default:
- printf(" IPOPT-%d{%d}", cp[0], len);
break;
}
}
ip_print(register const u_char *bp, register u_int length)
{
register const struct ip *ip;
- register u_int hlen, len, len0, off;
+ register u_int hlen, len, off;
const u_char *ipend;
register const u_char *cp;
u_char nh;
if (IP_V(ip) == 6)
printf(", wrong link-layer encapsulation");
}
- else
+ else if (!eflag)
printf("IP ");
if ((u_char *)(ip + 1) > snapend) {
return;
}
if (length < sizeof (struct ip)) {
- (void)printf("truncated-ip %d", length);
+ (void)printf("truncated-ip %u", length);
return;
}
hlen = IP_HL(ip) * 4;
(void)printf("truncated-ip - %u bytes missing! ",
len - length);
if (len < hlen) {
- (void)printf("bad-len %u", len);
- return;
+#ifdef GUESS_TSO
+ if (len) {
+ (void)printf("bad-len %u", len);
+ return;
+ }
+ else {
+ /* we guess that it is a TSO send */
+ len = length;
+ }
+#else
+ (void)printf("bad-len %u", len);
+ return;
+#endif /* GUESS_TSO */
}
/*
snapend = ipend;
len -= hlen;
- len0 = len;
off = EXTRACT_16BITS(&ip->ip_off);
(void)printf(", length: %u", EXTRACT_16BITS(&ip->ip_len));
if ((hlen - sizeof(struct ip)) > 0) {
- (void)printf(", optlength: %u (", hlen - (u_int)sizeof(struct ip));
+ printf(", options ( ");
ip_optprint((u_char *)(ip + 1), hlen - sizeof(struct ip));
printf(" )");
}
case IPPROTO_ESP:
{
int enh, padlen;
- advance = esp_print(gndo, cp, (const u_char *)ip, &enh, &padlen);
+ advance = esp_print(gndo, cp, len, (const u_char *)ip, &enh, &padlen);
if (advance <= 0)
break;
cp += advance;
break;
case IPPROTO_PIGP:
- case IPPROTO_EIGRP:
/*
* XXX - the current IANA protocol number assignments
* page lists 9 as "any private interior gateway
* IP_PROTO_EIGRP as 88; those names better
* match was the current protocol number
* assignments say.
- *
- * XXX - at least according to the Ethereal
- * dissectors, Cisco IGRP and Cisco EIGRP are
- * *not* the same, so it's not clear that both
- * IPPROTO_PIGP and IPPROTO_EIGRP should be
- * handed to the same print routine; "igrp_print()"
- * appears to be for IGRP, not EIGRP.
*/
igrp_print(cp, len, (const u_char *)ip);
break;
+ case IPPROTO_EIGRP:
+ eigrp_print(cp, len);
+ break;
+
case IPPROTO_ND:
(void)printf(" nd %d", len);
break;
case IPPROTO_EGP:
- egp_print(cp);
+ egp_print(cp, len);
break;
case IPPROTO_OSPF:
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