* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-atm.c,v 1.27 2002-12-04 19:12:39 hannes Exp $ (LBL)";
+static const char rcsid[] _U_ =
+ "@(#) $Header: /tcpdump/master/tcpdump/print-atm.c,v 1.38 2005-01-19 16:46:27 hannes Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include "ethertype.h"
#include "atm.h"
#include "atmuni31.h"
+#include "llc.h"
#include "ether.h"
+struct tok oam_celltype_values[] = {
+ { 0x1, "Fault Management" },
+ { 0x2, "Performance Management" },
+ { 0x8, "activate/deactivate" },
+ { 0xf, "System Management" },
+ { 0, NULL }
+};
+
+struct tok oam_fm_functype_values[] = {
+ { 0x0, "AIS" },
+ { 0x1, "RDI" },
+ { 0x4, "Continuity Check" },
+ { 0x8, "Loopback" },
+ { 0, NULL }
+};
+
+struct tok oam_pm_functype_values[] = {
+ { 0x0, "Forward Monitoring" },
+ { 0x1, "Backward Reporting" },
+ { 0x2, "Monitoring and Reporting" },
+ { 0, NULL }
+};
+
+struct tok oam_ad_functype_values[] = {
+ { 0x0, "Performance Monitoring" },
+ { 0x1, "Continuity Check" },
+ { 0, NULL }
+};
+
+static const struct tok *oam_functype_values[16] = {
+ NULL,
+ oam_fm_functype_values, /* 1 */
+ oam_pm_functype_values, /* 2 */
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ oam_ad_functype_values, /* 8 */
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL
+};
+
+/*
+ * 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' 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'
+ * 'h->len' 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 _U_, 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;
-
- ++infodelay;
- ts_print(&h->ts);
+ u_int32_t llchdr;
+ u_int hdrlen = 0;
if (caplen < 8) {
printf("[|atm]");
- goto out;
+ return (caplen);
}
/*
- * 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.
+ * 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.
*/
- snapend = p + caplen;
-
- if (EXTRACT_24BITS(p) == 0xaaaa03) {
+ 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.
- * XXX - should we also assume it's not a MAC header
- * if it begins with 0xfe 0xfe 0x03, for RFC 2684
- * routed NLPID-formatted PDUs?
+ *
+ * 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("%08x%08x %08x%08x ",
p += 20;
length -= 20;
caplen -= 20;
+ hdrlen += 20;
}
-
- /* lets call into the generic LLC handler */
- llc_print(p, length, caplen, NULL, NULL, NULL);
-
- if (xflag)
- default_print(p, caplen);
- out:
- putchar('\n');
+ atm_llc_print(p, length, caplen);
+ return (hdrlen);
}
/*
if (eflag)
printf("VPI:%u VCI:%u ", vpi, vci);
- /*
- * 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;
-
if (vpi == 0) {
switch (vci) {
case PPC:
sig_print(p, caplen);
- goto out;
+ return;
case BCC:
printf("broadcast sig: ");
- goto out;
-
- case OAMF4SC:
- printf("oamF4(segment): ");
- goto out;
+ return;
+ case OAMF4SC: /* fall through */
case OAMF4EC:
- printf("oamF4(end): ");
- goto out;
+ oam_print(p, length);
+ return;
case METAC:
printf("meta: ");
- goto out;
+ return;
case ILMIC:
printf("ilmi: ");
snmp_print(p, length);
- goto out;
+ return;
}
}
default:
/*
* Assumes traffic is LLC if unknown.
- * call into the generic LLC handler
*/
- llc_print(p, length, caplen, NULL, NULL, NULL);
+ atm_llc_print(p, length, caplen);
break;
case ATM_LANE:
lane_print(p, length, caplen);
break;
}
+}
+
+int
+oam_print (const u_char *p, u_int length) {
+
+ u_int16_t cell_header, cell_type, func_type,vpi,vci,payload,clp;
+
+ cell_header = EXTRACT_32BITS(p);
+ cell_type = ((*(p+4))>>4) & 0x0f;
+ func_type = *(p) & 0x0f;
+
+ vpi = (cell_header>>20)&0xff;
+ vci = (cell_header>>4)&0xffff;
+ payload = (cell_header>>1)&0x7;
+ clp = cell_header&0x1;
+
+ switch (vci) {
+ case OAMF4SC:
+ printf("OAM F4 (segment), ");
+ break;
+ case OAMF4EC:
+ printf("OAM F4 (end), ");
+ break;
+ default:
+ printf("OAM F5, ");
+ break;
+ }
+
+ if (eflag)
+ printf("vpi %u, vci %u, payload %u, clp %u, ",vpi,vci,payload,clp);
+
+ printf("cell-type %s (%u)",
+ tok2str(oam_celltype_values, "unknown", cell_type),
+ cell_type);
+
+ if (oam_functype_values[cell_type] == NULL)
+ printf(", func-type unknown (%u)", func_type);
+ else
+ printf(", func-type %s (%u)",
+ bittok2str(oam_functype_values[cell_type],"none",func_type),
+ func_type);
-out:
- if (xflag)
- default_print(p, caplen);
+ printf(", length %u",length);
+ return 1;
}
projects / tcpdump / blobdiff