Use the passed in length instead of the IP header's length in the

[tcpdump] / print-mobile.c

diff --git a/print-mobile.c b/print-mobile.c
index 8d93bbf9cd247a9a636b868da389524ef4deb47b..f217932a4f9ae26b90dbe7d39c0dcfd84c0ac610 100644 (file)
--- a/print-mobile.c
+++ b/print-mobile.c
@@ -42,7 +42,7 @@
 
 #ifndef lint
 static const char rcsid[] =
-     "@(#) $Header: /tcpdump/master/tcpdump/print-mobile.c,v 1.6 2001-06-15 22:17:33 fenner Exp $";
+     "@(#) $Header: /tcpdump/master/tcpdump/print-mobile.c,v 1.7 2001-08-20 17:53:54 fenner Exp $";
 #endif
 
 #include <sys/param.h>
@@ -70,8 +70,6 @@ struct mobile_ip {
 
 #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
  */
@@ -109,34 +107,9 @@ mobile_print(const u_char *bp, u_int length)
                (void)printf("> %s ",ipaddr_string(&mob->odst));
                (void)printf("(oproto=%d)",proto>>8);
        }
-       if (mob_in_cksum((u_short *)mob, osp ? 12 : 8)!=0) {
+       if (in_cksum((u_short *)mob, osp ? 12 : 8, 0)!=0) {
                (void)printf(" (bad checksum %d)",crc);
        }
 
        return;
 }
-
-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);
-}
-