* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-atm.c,v 1.21 2001-07-05 18:54:14 guy Exp $ (LBL)";
+static const char rcsid[] _U_ =
+ "@(#) $Header: /tcpdump/master/tcpdump/print-atm.c,v 1.35 2003-11-16 09:36:13 guy Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/socket.h>
-
-#include <netinet/in.h>
+#include <tcpdump-stdinc.h>
#include <stdio.h>
#include <pcap.h>
+#include <string.h>
#include "interface.h"
+#include "extract.h"
#include "addrtoname.h"
#include "ethertype.h"
+#include "atm.h"
+#include "atmuni31.h"
+#include "llc.h"
+
+#include "ether.h"
+
+/*
+ * Print an RFC 1483 LLC-encapsulated ATM frame.
+ */
+static void
+atm_llc_print(const u_char *p, int length, int caplen)
+{
+ u_short extracted_ethertype;
+
+ if (!llc_print(p, length, caplen, NULL, NULL,
+ &extracted_ethertype)) {
+ /* ether_type not known, print raw packet */
+ if (extracted_ethertype) {
+ printf("(LLC %s) ",
+ etherproto_string(htons(extracted_ethertype)));
+ }
+ if (!xflag && !qflag)
+ default_print(p, caplen);
+ }
+}
+
+/*
+ * Given a SAP value, generate the LLC header value for a UI packet
+ * with that SAP as the source and destination SAP.
+ */
+#define LLC_UI_HDR(sap) ((sap)<<16 | (sap<<8) | 0x03)
/*
- * This is the top level routine of the printer. 'p' is the points
- * to the LLC/SNAP header of the packet, 'tvp' is the timestamp,
- * 'length' is the length of the packet off the wire, and 'caplen'
+ * This is the top level routine of the printer. 'p' points
+ * to the LLC/SNAP header of the packet, 'h->ts' is the timestamp,
+ * 'h->length' is the length of the packet off the wire, and 'h->caplen'
* is the number of bytes actually captured.
*/
-void
-atm_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
+u_int
+atm_if_print(const struct pcap_pkthdr *h, const u_char *p)
{
u_int caplen = h->caplen;
u_int length = h->len;
- u_short ethertype;
-
- ++infodelay;
- ts_print(&h->ts);
+ u_int32_t llchdr;
+ u_int hdrlen = 0;
if (caplen < 8) {
printf("[|atm]");
- goto out;
+ return (caplen);
}
- if (p[0] != 0xaa || p[1] != 0xaa || p[2] != 0x03) {
- /*XXX assume 802.6 MAC header from fore driver */
+
+ /*
+ * Extract the presumed LLC header into a variable, for quick
+ * testing.
+ * Then check for a header that's neither a header for a SNAP
+ * packet nor an RFC 2684 routed NLPID-formatted PDU nor
+ * an 802.2-but-no-SNAP IP packet.
+ */
+ llchdr = EXTRACT_24BITS(p);
+ if (llchdr != LLC_UI_HDR(LLCSAP_SNAP) &&
+ llchdr != LLC_UI_HDR(LLCSAP_ISONS) &&
+ llchdr != LLC_UI_HDR(LLCSAP_IP)) {
+ /*
+ * XXX - assume 802.6 MAC header from Fore driver.
+ *
+ * Unfortunately, the above list doesn't check for
+ * all known SAPs, doesn't check for headers where
+ * the source and destination SAP aren't the same,
+ * and doesn't check for non-UI frames. It also
+ * runs the risk of an 802.6 MAC header that happens
+ * to begin with one of those values being
+ * incorrectly treated as an 802.2 header.
+ *
+ * So is that Fore driver still around? And, if so,
+ * is it still putting 802.6 MAC headers on ATM
+ * packets? If so, could it be changed to use a
+ * new DLT_IEEE802_6 value if we added it?
+ */
if (eflag)
- printf("%04x%04x %04x%04x ",
- p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3],
- p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7],
- p[8] << 24 | p[9] << 16 | p[10] << 8 | p[11],
- p[12] << 24 | p[13] << 16 | p[14] << 8 | p[15]);
+ printf("%08x%08x %08x%08x ",
+ EXTRACT_32BITS(p),
+ EXTRACT_32BITS(p+4),
+ EXTRACT_32BITS(p+8),
+ EXTRACT_32BITS(p+12));
p += 20;
length -= 20;
caplen -= 20;
+ hdrlen += 20;
}
- ethertype = p[6] << 8 | p[7];
+ atm_llc_print(p, length, caplen);
+ return (hdrlen);
+}
+
+/*
+ * ATM signalling.
+ */
+static struct tok msgtype2str[] = {
+ { CALL_PROCEED, "Call_proceeding" },
+ { CONNECT, "Connect" },
+ { CONNECT_ACK, "Connect_ack" },
+ { SETUP, "Setup" },
+ { RELEASE, "Release" },
+ { RELEASE_DONE, "Release_complete" },
+ { RESTART, "Restart" },
+ { RESTART_ACK, "Restart_ack" },
+ { STATUS, "Status" },
+ { STATUS_ENQ, "Status_enquiry" },
+ { ADD_PARTY, "Add_party" },
+ { ADD_PARTY_ACK, "Add_party_ack" },
+ { ADD_PARTY_REJ, "Add_party_reject" },
+ { DROP_PARTY, "Drop_party" },
+ { DROP_PARTY_ACK, "Drop_party_ack" },
+ { 0, NULL }
+};
+
+static void
+sig_print(const u_char *p, int caplen)
+{
+ bpf_u_int32 call_ref;
+
+ if (caplen < PROTO_POS) {
+ printf("[|atm]");
+ return;
+ }
+ if (p[PROTO_POS] == Q2931) {
+ /*
+ * protocol:Q.2931 for User to Network Interface
+ * (UNI 3.1) signalling
+ */
+ printf("Q.2931");
+ if (caplen < MSG_TYPE_POS) {
+ printf(" [|atm]");
+ return;
+ }
+ printf(":%s ",
+ tok2str(msgtype2str, "msgtype#%d", p[MSG_TYPE_POS]));
+
+ if (caplen < CALL_REF_POS+3) {
+ printf("[|atm]");
+ return;
+ }
+ call_ref = EXTRACT_24BITS(&p[CALL_REF_POS]);
+ printf("CALL_REF:0x%06x", call_ref);
+ } else {
+ /* SCCOP with some unknown protocol atop it */
+ printf("SSCOP, proto %d ", p[PROTO_POS]);
+ }
+}
+
+/*
+ * Print an ATM PDU (such as an AAL5 PDU).
+ */
+void
+atm_print(u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length,
+ u_int caplen)
+{
if (eflag)
- printf("%02x %02x %02x %02x-%02x-%02x %04x: ",
- p[0], p[1], p[2], /* dsap/ssap/ctrl */
- p[3], p[4], p[5], /* manufacturer's code */
- ethertype);
+ printf("VPI:%u VCI:%u ", vpi, vci);
- /*
- * Some printers want to get back at the ethernet addresses,
- * and/or check that they're not walking off the end of the packet.
- * Rather than pass them all the way down, we set these globals.
- */
- packetp = p;
- snapend = p + caplen;
+ if (vpi == 0) {
+ switch (vci) {
- length -= 8;
- caplen -= 8;
- p += 8;
+ case PPC:
+ sig_print(p, caplen);
+ return;
- switch (ethertype) {
+ case BCC:
+ printf("broadcast sig: ");
+ return;
- case ETHERTYPE_IP:
- ip_print(p, length);
- break;
+ case OAMF4SC:
+ printf("oamF4(segment): ");
+ return;
-#ifdef INET6
- case ETHERTYPE_IPV6:
- ip6_print(p, length);
- break;
-#endif /*INET6*/
+ case OAMF4EC:
+ printf("oamF4(end): ");
+ return;
- /*XXX this probably isn't right */
- case ETHERTYPE_ARP:
- case ETHERTYPE_REVARP:
- arp_print(p, length, caplen);
- break;
-#ifdef notyet
- case ETHERTYPE_DN:
- decnet_print(p, length, caplen);
- break;
+ case METAC:
+ printf("meta: ");
+ return;
- case ETHERTYPE_ATALK:
- if (vflag)
- fputs("et1 ", stdout);
- atalk_print(p, length);
- break;
+ case ILMIC:
+ printf("ilmi: ");
+ snmp_print(p, length);
+ return;
+ }
+ }
- case ETHERTYPE_AARP:
- aarp_print(p, length);
- break;
+ switch (traftype) {
- case ETHERTYPE_LAT:
- case ETHERTYPE_MOPRC:
- case ETHERTYPE_MOPDL:
- /* default_print for now */
-#endif
+ case ATM_LLC:
default:
- /* ether_type not known, print raw packet */
- if (!eflag)
- printf("%02x %02x %02x %02x-%02x-%02x %04x: ",
- packetp[0], packetp[1], packetp[2], /* dsap/ssap/ctrl */
- packetp[3], packetp[4], packetp[5], /* manufacturer's code */
- ethertype);
- if (!xflag && !qflag)
- default_print(p, caplen);
+ /*
+ * Assumes traffic is LLC if unknown.
+ */
+ atm_llc_print(p, length, caplen);
+ break;
+
+ case ATM_LANE:
+ lane_print(p, length, caplen);
+ break;
}
- if (xflag)
- default_print(p, caplen);
- out:
- putchar('\n');
- --infodelay;
- if (infoprint)
- info(0);
}
projects / tcpdump / blobdiff