X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/cfabfb053b4bf5b50f4d98d59053e1cc97ff5014..9bdbb51f4122817ca8bdba9fb9917969809ff451:/print-sll.c

diff --git a/print-sll.c b/print-sll.c
index ccb94fb5..d96b3de2 100644
--- a/print-sll.c
+++ b/print-sll.c
@@ -19,8 +19,8 @@
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
 #ifndef lint
-static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-sll.c,v 1.11 2002-12-18 09:41:18 guy Exp $ (LBL)";
+static const char rcsid[] _U_ =
+    "@(#) $Header: /tcpdump/master/tcpdump/print-sll.c,v 1.19 2005-11-13 12:12:43 guy Exp $ (LBL)";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -36,76 +36,90 @@ static const char rcsid[] =
 #include "interface.h"
 #include "addrtoname.h"
 #include "ethertype.h"
+#include "extract.h"
 
 #include "ether.h"
 #include "sll.h"
 
+const struct tok sll_pkttype_values[] = {
+    { LINUX_SLL_HOST, "In" },
+    { LINUX_SLL_BROADCAST, "B" },
+    { LINUX_SLL_MULTICAST, "M" },
+    { LINUX_SLL_OTHERHOST, "P" },
+    { LINUX_SLL_OUTGOING, "Out" },
+    { 0, NULL}
+};
+
 static inline void
 sll_print(register const struct sll_header *sllp, u_int length)
 {
-	u_short halen;
-
-	switch (ntohs(sllp->sll_pkttype)) {
-
-	case LINUX_SLL_HOST:
-		(void)printf("< ");
-		break;
-
-	case LINUX_SLL_BROADCAST:
-		(void)printf("B ");
-		break;
-
-	case LINUX_SLL_MULTICAST:
-		(void)printf("M ");
-		break;
-
-	case LINUX_SLL_OTHERHOST:
-		(void)printf("P ");
-		break;
-
-	case LINUX_SLL_OUTGOING:
-		(void)printf("> ");
-		break;
+	u_short ether_type;
 
-	default:
-		(void)printf("? ");
-		break;
-	}
+        printf("%3s ",tok2str(sll_pkttype_values,"?",EXTRACT_16BITS(&sllp->sll_pkttype)));
 
 	/*
 	 * XXX - check the link-layer address type value?
 	 * For now, we just assume 6 means Ethernet.
 	 * XXX - print others as strings of hex?
 	 */
-	halen = ntohs(sllp->sll_halen);
-	if (halen == 6)
+	if (EXTRACT_16BITS(&sllp->sll_halen) == 6)
 		(void)printf("%s ", etheraddr_string(sllp->sll_addr));
 
-	if (!qflag)
-		(void)printf("%s ", etherproto_string(sllp->sll_protocol));
-	(void)printf("%d: ", length);
+	if (!qflag) {
+		ether_type = EXTRACT_16BITS(&sllp->sll_protocol);
+	
+		if (ether_type <= ETHERMTU) {
+			/*
+			 * Not an Ethernet type; what type is it?
+			 */
+			switch (ether_type) {
+
+			case LINUX_SLL_P_802_3:
+				/*
+				 * Ethernet_802.3 IPX frame.
+				 */
+				(void)printf("802.3");
+				break;
+
+			case LINUX_SLL_P_802_2:
+				/*
+				 * 802.2.
+				 */
+				(void)printf("802.3");
+				break;
+
+			default:
+				/*
+				 * What is it?
+				 */
+				(void)printf("ethertype Unknown (0x%04x)",
+				    ether_type);
+				break;
+			}
+		} else {
+			(void)printf("ethertype %s (0x%04x)",
+			    tok2str(ethertype_values, "Unknown", ether_type),
+			    ether_type);
+		}
+		(void)printf(", length %u: ", length);
+	}
 }
 
 /*
  * This is the top level routine of the printer.  'p' points to the
  * Linux "cooked capture" header of the packet, 'h->ts' is the timestamp,
- * 'h->length' is the length of the packet off the wire, and 'h->caplen'
+ * 'h->len' is the length of the packet off the wire, and 'h->caplen'
  * is the number of bytes actually captured.
  */
-void
-sll_if_print(u_char *user _U_, const struct pcap_pkthdr *h, const u_char *p)
+u_int
+sll_if_print(const struct pcap_pkthdr *h, const u_char *p)
 {
 	u_int caplen = h->caplen;
 	u_int length = h->len;
-	const u_char *orig_p;
-	u_int orig_caplen;
 	register const struct sll_header *sllp;
 	u_short ether_type;
 	u_short extracted_ethertype;
 
-	++infodelay;
-	ts_print(&h->ts);
-
 	if (caplen < SLL_HDR_LEN) {
 		/*
 		 * XXX - this "can't happen" because "pcap-linux.c" always
@@ -113,7 +127,7 @@ sll_if_print(u_char *user _U_, const struct pcap_pkthdr *h, const u_char *p)
 		 * cooked socket capture.
 		 */
 		printf("[|sll]");
-		goto out;
+		return (caplen);
 	}
 
 	sllp = (const struct sll_header *)p;
@@ -121,20 +135,6 @@ sll_if_print(u_char *user _U_, const struct pcap_pkthdr *h, const u_char *p)
 	if (eflag)
 		sll_print(sllp, length);
 
-	/*
-	 * Some printers want to check that they're not walking off the
-	 * end of the packet.
-	 * Rather than pass it all the way down, we set this global.
-	 */
-	snapend = p + caplen;
-
-	/*
-	 * Save the information for the full packet, so we can print
-	 * everything if "-e" and "-x" are both specified.
-	 */
-	orig_p = p;
-	orig_caplen = caplen;
-
 	/*
 	 * Go past the cooked-mode header.
 	 */
@@ -148,7 +148,6 @@ sll_if_print(u_char *user _U_, const struct pcap_pkthdr *h, const u_char *p)
 	 * Is it (gag) an 802.3 encapsulation, or some non-Ethernet
 	 * packet type?
 	 */
-	extracted_ethertype = 0;
 	if (ether_type <= ETHERMTU) {
 		/*
 		 * Yes - what type is it?
@@ -173,6 +172,9 @@ sll_if_print(u_char *user _U_, const struct pcap_pkthdr *h, const u_char *p)
 			break;
 
 		default:
+			extracted_ethertype = 0;
+			/*FALLTHROUGH*/
+
 		unknown:
 			/* ether_type not known, print raw packet */
 			if (!eflag)
@@ -181,7 +183,7 @@ sll_if_print(u_char *user _U_, const struct pcap_pkthdr *h, const u_char *p)
 				printf("(LLC %s) ",
 			       etherproto_string(htons(extracted_ethertype)));
 			}
-			if (!xflag && !qflag)
+			if (!suppress_default_print)
 				default_print(p, caplen);
 			break;
 		}
@@ -190,14 +192,9 @@ sll_if_print(u_char *user _U_, const struct pcap_pkthdr *h, const u_char *p)
 		/* ether_type not known, print raw packet */
 		if (!eflag)
 			sll_print(sllp, length + SLL_HDR_LEN);
-		if (!xflag && !qflag)
+		if (!suppress_default_print)
 			default_print(p, caplen);
 	}
-	if (xflag)
-		default_print_packet(orig_p, orig_caplen, SLL_HDR_LEN);
- out:
-	putchar('\n');
-	--infodelay;
-	if (infoprint)
-		info(0);
+
+	return (SLL_HDR_LEN);
 }