There's no link-layer header on Linux ARPHRD_ATM packets; there's

[tcpdump] / print-cip.c

diff --git a/print-cip.c b/print-cip.c
index aeeae2d639343bd3800de919d7c89f02731c9145..28102325aab5357e0b95886e6fa37459fa4d1961 100644 (file)
--- a/print-cip.c
+++ b/print-cip.c
@@ -22,67 +22,48 @@
 
 #ifndef lint
 static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-cip.c,v 1.1 1999-11-21 03:52:22 assar Exp $ (LBL)";
+    "@(#) $Header: /tcpdump/master/tcpdump/print-cip.c,v 1.16 2001-09-23 21:52:38 guy Exp $ (LBL)";
 #endif
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <string.h>
+
 #include <sys/param.h>
 #include <sys/time.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 
-#include <net/if.h>
 
 #include <netinet/in.h>
-#include <netinet/if_ether.h>
-#include <netinet/in_systm.h>
-#include <netinet/ip.h>
-#include <netinet/ip_var.h>
-#include <netinet/udp.h>
-#include <netinet/udp_var.h>
-#include <netinet/tcp.h>
-#include <netinet/tcpip.h>
 
 #include <stdio.h>
 #include <pcap.h>
 
 #include "interface.h"
 #include "addrtoname.h"
+#include "ethertype.h"
+#include "ether.h"
 
-const u_char *packetp;
-const u_char *snapend;
-
-#define RFC1483LLC_LEN 8 
+#define RFC1483LLC_LEN 8 
 
 static unsigned char rfcllc[] = {
-  0xaa,   /* DSAP: non-ISO */
-  0xaa,   /* SSAP: non-ISO */
-  0x03,   /* Ctrl: Unnumbered Information Command PDU */
-  0x00,   /* OUI: EtherType */
-  0x00,
-  0x00 };
+       0xaa,   /* DSAP: non-ISO */
+       0xaa,   /* SSAP: non-ISO */
+       0x03,   /* Ctrl: Unnumbered Information Command PDU */
+       0x00,   /* OUI: EtherType */
+       0x00,
+       0x00 };
 
 static inline void
 cip_print(register const u_char *bp, int length)
 {
-  int i;
-
-  if (memcmp(rfcllc, bp, sizeof(rfcllc))) {
-    if (qflag) {
-      for(i=0;i<RFC1483LLC_LEN;i++)
-       (void)printf("%2.2x ",bp[i]);
-    } else {
-      for(i=0;i<RFC1483LLC_LEN-2;i++)
-       (void)printf("%2.2x ",bp[i]);
-      etherproto_string(((u_short*)bp)[3]);
-    } 
-  } else {
-    if (qflag)
-      (void)printf("(null encapsulation)");
-    else {
-      (void)printf("(null encap)");
-      etherproto_string(ETHERTYPE_IP);
-    }
-  }
+       /*
+        * There is no MAC-layer header, so just print the length.
+        */
+       printf("%d: ", length);
 }
 
 /*
@@ -94,12 +75,11 @@ cip_print(register const u_char *bp, int length)
 void
 cip_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
 {
-       int caplen = h->caplen;
-       int length = h->len;
-       u_short ether_type;
+       u_int caplen = h->caplen;
+       u_int length = h->len;
        u_short extracted_ethertype;
-       u_short *bp;
 
+       ++infodelay;
        ts_print(&h->ts);
 
        if (memcmp(rfcllc, p, sizeof(rfcllc))==0 && caplen < RFC1483LLC_LEN) {
@@ -108,7 +88,7 @@ cip_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
        }
 
        if (eflag)
-         cip_print(p, length);
+               cip_print(p, length);
 
        /*
         * Some printers want to get back at the ethernet addresses,
@@ -118,25 +98,15 @@ cip_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
        packetp = p;
        snapend = p + caplen;
 
-       if (memcmp(rfcllc, p, sizeof(rfcllc))==0) {
-         length -= RFC1483LLC_LEN;
-         caplen -= RFC1483LLC_LEN;
-         bp = (u_short*)p;
-         p += RFC1483LLC_LEN;
-         ether_type = ntohs(bp[3]);
-       } else
-         ether_type = ETHERTYPE_IP;
-
-       /*
-        * Is it (gag) an 802.3 encapsulation?
-        */
-       extracted_ethertype = 0;
-       if (ether_type < ETHERMTU) {
-               /* Try to print the LLC-layer header & higher layers */
-               if (llc_print(p, length, caplen, NULL, NULL)==0) {
+       if (memcmp(rfcllc, p, sizeof(rfcllc)) == 0) {
+               /*
+                * LLC header is present.  Try to print it & higher layers.
+                */
+               if (llc_print(p, length, caplen, NULL, NULL,
+                   &extracted_ethertype) == 0) {
                        /* ether_type not known, print raw packet */
                        if (!eflag)
-                               cip_print((u_char *)bp, length);
+                               cip_print(p, length);
                        if (extracted_ethertype) {
                                printf("(LLC %s) ",
                               etherproto_string(htons(extracted_ethertype)));
@@ -144,15 +114,18 @@ cip_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
                        if (!xflag && !qflag)
                                default_print(p, caplen);
                }
-       } else if (ether_encap_print(ether_type, p, length, caplen) == 0) {
-               /* ether_type not known, print raw packet */
-               if (!eflag)
-                       cip_print((u_char *)bp, length + RFC1483LLC_LEN);
-               if (!xflag && !qflag)
-                       default_print(p, caplen);
+       } else {
+               /*
+                * LLC header is absent; treat it as just IP.
+                */
+               ip_print(p, length);
        }
+
        if (xflag)
                default_print(p, caplen);
  out:
        putchar('\n');
+       --infodelay;
+       if (infoprint)
+               info(0);
 }