* POSSIBILITY OF SUCH DAMAGE.
*/
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
+/* \summary: IPv4 mobility printer */
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-mobile.c,v 1.4 2000-09-23 08:54:34 guy Exp $";
-#endif
+#include <config.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/uio.h>
-#include <sys/socket.h>
+#include "netdissect-stdinc.h"
-#include <netinet/in.h>
-#include <netinet/in_systm.h>
-
-#include <netdb.h>
-#include <stdio.h>
-
-#include "interface.h"
+#define ND_LONGJMP_FROM_TCHECK
+#include "netdissect.h"
#include "addrtoname.h"
-#include "extract.h" /* must come after interface.h */
+#include "extract.h"
#define MOBILE_SIZE (8)
struct mobile_ip {
- u_int16_t proto;
- u_int16_t hcheck;
- u_int32_t odst;
- u_int32_t osrc;
+ nd_uint16_t proto;
+ nd_uint16_t hcheck;
+ nd_uint32_t odst;
+ nd_uint32_t osrc;
};
#define OSRC_PRES 0x0080 /* old source is present */
-static u_int16_t mob_in_cksum(u_short *p, int len);
-
/*
* Deencapsulate and print a mobile-tunneled IP datagram
*/
void
-mobile_print(const u_char *bp, u_int length)
+mobile_print(netdissect_options *ndo, const u_char *bp, u_int length)
{
- const u_char *cp = bp +8 ;
const struct mobile_ip *mob;
+ struct cksum_vec vec[1];
u_short proto,crc;
u_char osp =0; /* old source address present */
+ ndo->ndo_protocol = "mobile";
mob = (const struct mobile_ip *)bp;
- if (length < MOBILE_SIZE) {
- fputs("[|mobile]", stdout);
- return;
- }
+ nd_print_protocol(ndo);
+ ND_PRINT(": ");
+ ND_ICHECK_U(length, <, MOBILE_SIZE);
+ ND_TCHECK_SIZE(mob);
- proto = EXTRACT_16BITS(&mob->proto);
- crc = EXTRACT_16BITS(&mob->hcheck);
+ proto = GET_BE_U_2(mob->proto);
+ crc = GET_BE_U_2(mob->hcheck);
if (proto & OSRC_PRES) {
osp=1;
- cp +=4 ;
}
-
+
if (osp) {
- fputs("[S] ",stdout);
- if (vflag)
- (void)printf("%s ",ipaddr_string(&mob->osrc));
+ ND_PRINT("[S] ");
+ if (ndo->ndo_vflag)
+ ND_PRINT("%s ", GET_IPADDR_STRING(mob->osrc));
} else {
- fputs("[] ",stdout);
+ ND_PRINT("[] ");
}
- if (vflag) {
- (void)printf("> %s ",ipaddr_string(&mob->odst));
- (void)printf("(oproto=%d)",proto>>8);
+ if (ndo->ndo_vflag) {
+ ND_PRINT("> %s ", GET_IPADDR_STRING(mob->odst));
+ ND_PRINT("(oproto=%u)", proto>>8);
}
- if (mob_in_cksum((u_short *)mob, osp ? 12 : 8)!=0) {
- (void)printf(" (bad checksum %d)",crc);
+ vec[0].ptr = (const uint8_t *)(const void *)mob;
+ vec[0].len = osp ? 12 : 8;
+ if (in_cksum(vec, 1)!=0) {
+ ND_PRINT(" (bad checksum %u)", crc);
}
-
return;
+invalid:
+ nd_print_invalid(ndo);
}
-
-static u_int16_t mob_in_cksum(u_short *p, int len)
-{
- u_int32_t sum = 0;
- int nwords = len >> 1;
-
- while (nwords-- != 0)
- sum += *p++;
-
- if (len & 1) {
- union {
- u_int16_t w;
- u_int8_t c[2];
- } u;
- u.c[0] = *(u_char *)p;
- u.c[1] = 0;
- sum += u.w;
- }
-
- /* end-around-carry */
- sum = (sum >> 16) + (sum & 0xffff);
- sum += (sum >> 16);
- return (~sum);
-}
-