X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/fb1b6d808f19faae76526a2e3eed52a75fb22ff1..1fb50928ce27360c1c987312774f686b23c69b51:/print-ipfc.c

diff --git a/print-ipfc.c b/print-ipfc.c
index cf3f5626..b8a08e96 100644
--- a/print-ipfc.c
+++ b/print-ipfc.c
@@ -19,31 +19,29 @@
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
 
-#ifndef lint
-static const char rcsid[] _U_ =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-ipfc.c,v 1.7 2004-03-17 23:24:37 guy Exp $ (LBL)";
-#endif
+/* \summary: IP over Fibre Channel printer */
+
+/* specification: RFC 2625 */
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
-#include <tcpdump-stdinc.h>
+#include <netdissect-stdinc.h>
 
-#include <pcap.h>
-#include <stdio.h>
 #include <string.h>
 
-#include "interface.h"
+#include "netdissect.h"
 #include "addrtoname.h"
-#include "ethertype.h"
 
 #include "ether.h"
-#include "ipfc.h"
 
-/*
- * RFC 2625 IP-over-Fibre Channel.
- */
+struct ipfc_header {
+	u_char  ipfc_dhost[8];
+	u_char  ipfc_shost[8];
+};
+
+#define IPFC_HDRLEN 16
 
 /* Extract src, dst addresses */
 static inline void
@@ -62,64 +60,76 @@ extract_ipfc_addrs(const struct ipfc_header *ipfcp, char *ipfcsrc,
  * Print the Network_Header
  */
 static inline void
-ipfc_hdr_print(register const struct ipfc_header *ipfcp _U_,
+ipfc_hdr_print(netdissect_options *ndo,
+	   register const struct ipfc_header *ipfcp _U_,
 	   register u_int length, register const u_char *ipfcsrc,
 	   register const u_char *ipfcdst)
 {
 	const char *srcname, *dstname;
 
-	srcname = etheraddr_string(ipfcsrc);
-	dstname = etheraddr_string(ipfcdst);
+	srcname = etheraddr_string(ndo, ipfcsrc);
+	dstname = etheraddr_string(ndo, ipfcdst);
 
 	/*
-	 * XXX - show the upper 16 bits?  Do so only if "vflag" is set?
+	 * XXX - should we show the upper 16 bits of the addresses?
+	 * Do so only if "vflag" is set?
+	 * Section 3.3 "FC Port and Node Network Addresses" says that
+	 *
+	 *    In this specification, both the Source and Destination
+	 *    4-bit NAA identifiers SHALL be set to binary '0001'
+	 *    indicating that an IEEE 48-bit MAC address is contained
+	 *    in the lower 48 bits of the network address fields. The
+	 *    high order 12 bits in the network address fields SHALL
+	 *    be set to 0x0000.
+	 *
+	 * so, for captures following this specification, the upper 16
+	 * bits should be 0x1000, followed by a MAC address.
 	 */
-	(void) printf("%s %s %d: ", srcname, dstname, length);
+	ND_PRINT((ndo, "%s > %s, length %u: ", srcname, dstname, length));
 }
 
-static void
-ipfc_print(const u_char *p, u_int length, u_int caplen)
+static u_int
+ipfc_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen)
 {
 	const struct ipfc_header *ipfcp = (const struct ipfc_header *)p;
 	struct ether_header ehdr;
-	u_short extracted_ethertype;
+	struct lladdr_info src, dst;
+	int llc_hdrlen;
 
 	if (caplen < IPFC_HDRLEN) {
-		printf("[|ipfc]");
-		return;
+		ND_PRINT((ndo, "[|ipfc]"));
+		return (caplen);
 	}
 	/*
 	 * Get the network addresses into a canonical form
 	 */
 	extract_ipfc_addrs(ipfcp, (char *)ESRC(&ehdr), (char *)EDST(&ehdr));
 
-	if (eflag)
-		ipfc_hdr_print(ipfcp, length, ESRC(&ehdr), EDST(&ehdr));
+	if (ndo->ndo_eflag)
+		ipfc_hdr_print(ndo, ipfcp, length, ESRC(&ehdr), EDST(&ehdr));
+
+	src.addr = ESRC(&ehdr);
+	src.addr_string = etheraddr_string;
+	dst.addr = EDST(&ehdr);
+	dst.addr_string = etheraddr_string;
 
 	/* Skip over Network_Header */
 	length -= IPFC_HDRLEN;
 	p += IPFC_HDRLEN;
 	caplen -= IPFC_HDRLEN;
 
-	/* Frame Control field determines interpretation of packet */
-	extracted_ethertype = 0;
 	/* Try to print the LLC-layer header & higher layers */
-	if (llc_print(p, length, caplen, ESRC(&ehdr), EDST(&ehdr),
-	    &extracted_ethertype) == 0) {
+	llc_hdrlen = llc_print(ndo, p, length, caplen, &src, &dst);
+	if (llc_hdrlen < 0) {
 		/*
 		 * Some kinds of LLC packet we cannot
 		 * handle intelligently
 		 */
-		if (!eflag)
-			ipfc_hdr_print(ipfcp, length + IPFC_HDRLEN,
-			    ESRC(&ehdr), EDST(&ehdr));
-		if (extracted_ethertype) {
-			printf("(LLC %s) ",
-		etherproto_string(htons(extracted_ethertype)));
-		}
-		if (!xflag && !qflag)
-			default_print(p, caplen);
+		if (!ndo->ndo_suppress_default_print)
+			ND_DEFAULTPRINT(p, caplen);
+		llc_hdrlen = -llc_hdrlen;
 	}
+	return (IPFC_HDRLEN + llc_hdrlen);
 }
 
 /*
@@ -129,9 +139,7 @@ ipfc_print(const u_char *p, u_int length, u_int caplen)
  * is the number of bytes actually captured.
  */
 u_int
-ipfc_if_print(const struct pcap_pkthdr *h, register const u_char *p)
+ipfc_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, register const u_char *p)
 {
-	ipfc_print(p, h->len, h->caplen);
-
-	return (IPFC_HDRLEN);
+	return (ipfc_print(ndo, p, h->len, h->caplen));
 }