* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-atm.c,v 1.23 2002-04-07 10:05:40 guy Exp $ (LBL)";
-#endif
-#ifdef HAVE_CONFIG_H
-#include "config.h"
+/* \summary: Asynchronous Transfer Mode (ATM) printer */
+
+#include <config.h>
+
+#include "netdissect-stdinc.h"
+
+#define ND_LONGJMP_FROM_TCHECK
+#include "netdissect.h"
+#include "extract.h"
+#include "addrtoname.h"
+#include "atm.h"
+#include "llc.h"
+
+/* start of the original atmuni31.h */
+
+/*
+ * Copyright (c) 1997 Yen Yen Lim and North Dakota State University
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by Yen Yen Lim and
+ North Dakota State University
+ * 4. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* Based on UNI3.1 standard by ATM Forum */
+
+/* ATM traffic types based on VPI=0 and (the following VCI */
+#define VCI_PPC 0x05 /* Point-to-point signal msg */
+#define VCI_BCC 0x02 /* Broadcast signal msg */
+#define VCI_OAMF4SC 0x03 /* Segment OAM F4 flow cell */
+#define VCI_OAMF4EC 0x04 /* End-to-end OAM F4 flow cell */
+#define VCI_METAC 0x01 /* Meta signal msg */
+#define VCI_ILMIC 0x10 /* ILMI msg */
+
+/* Q.2931 signalling messages */
+#define CALL_PROCEED 0x02 /* call proceeding */
+#define CONNECT 0x07 /* connect */
+#define CONNECT_ACK 0x0f /* connect_ack */
+#define SETUP 0x05 /* setup */
+#define RELEASE 0x4d /* release */
+#define RELEASE_DONE 0x5a /* release_done */
+#define RESTART 0x46 /* restart */
+#define RESTART_ACK 0x4e /* restart ack */
+#define STATUS 0x7d /* status */
+#define STATUS_ENQ 0x75 /* status ack */
+#define ADD_PARTY 0x80 /* add party */
+#define ADD_PARTY_ACK 0x81 /* add party ack */
+#define ADD_PARTY_REJ 0x82 /* add party rej */
+#define DROP_PARTY 0x83 /* drop party */
+#define DROP_PARTY_ACK 0x84 /* drop party ack */
+
+/* Information Element Parameters in the signalling messages */
+#define CAUSE 0x08 /* cause */
+#define ENDPT_REF 0x54 /* endpoint reference */
+#define AAL_PARA 0x58 /* ATM adaptation layer parameters */
+#define TRAFF_DESCRIP 0x59 /* atm traffic descriptors */
+#define CONNECT_ID 0x5a /* connection identifier */
+#define QOS_PARA 0x5c /* quality of service parameters */
+#define B_HIGHER 0x5d /* broadband higher layer information */
+#define B_BEARER 0x5e /* broadband bearer capability */
+#define B_LOWER 0x5f /* broadband lower information */
+#define CALLING_PARTY 0x6c /* calling party number */
+#define CALLED_PARTY 0x70 /* called party number */
+
+#define Q2931 0x09
+
+/* Q.2931 signalling general messages format */
+#define PROTO_POS 0 /* offset of protocol discriminator */
+#define CALL_REF_POS 2 /* offset of call reference value */
+#define MSG_TYPE_POS 5 /* offset of message type */
+#if 0
+#define MSG_LEN_POS 7 /* offset of message length */
+#define IE_BEGIN_POS 9 /* offset of first information element */
+
+/* format of signalling messages */
+#define TYPE_POS 0
+#define LEN_POS 2
+#define FIELD_BEGIN_POS 4
#endif
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/socket.h>
+/* end of the original atmuni31.h */
-#include <netinet/in.h>
-#include <stdio.h>
-#include <pcap.h>
-#include <string.h>
+#define OAM_CRC10_MASK 0x3ff
+#define OAM_PAYLOAD_LEN 48
+#define OAM_FUNCTION_SPECIFIC_LEN 45 /* this excludes crc10 and cell-type/function-type */
+#define OAM_CELLTYPE_FUNCTYPE_LEN 1
-#include "interface.h"
-#include "addrtoname.h"
-#include "ethertype.h"
+static const struct tok oam_f_values[] = {
+ { VCI_OAMF4SC, "OAM F4 (segment)" },
+ { VCI_OAMF4EC, "OAM F4 (end)" },
+ { 0, NULL }
+};
+
+static const struct tok atm_pty_values[] = {
+ { 0x0, "user data, uncongested, SDU 0" },
+ { 0x1, "user data, uncongested, SDU 1" },
+ { 0x2, "user data, congested, SDU 0" },
+ { 0x3, "user data, congested, SDU 1" },
+ { 0x4, "VCC OAM F5 flow segment" },
+ { 0x5, "VCC OAM F5 flow end-to-end" },
+ { 0x6, "Traffic Control and resource Mgmt" },
+ { 0, NULL }
+};
+
+#define OAM_CELLTYPE_FM 0x1
+#define OAM_CELLTYPE_PM 0x2
+#define OAM_CELLTYPE_AD 0x8
+#define OAM_CELLTYPE_SM 0xf
+
+static const struct tok oam_celltype_values[] = {
+ { OAM_CELLTYPE_FM, "Fault Management" },
+ { OAM_CELLTYPE_PM, "Performance Management" },
+ { OAM_CELLTYPE_AD, "activate/deactivate" },
+ { OAM_CELLTYPE_SM, "System Management" },
+ { 0, NULL }
+};
+
+#define OAM_FM_FUNCTYPE_AIS 0x0
+#define OAM_FM_FUNCTYPE_RDI 0x1
+#define OAM_FM_FUNCTYPE_CONTCHECK 0x4
+#define OAM_FM_FUNCTYPE_LOOPBACK 0x8
+
+static const struct tok oam_fm_functype_values[] = {
+ { OAM_FM_FUNCTYPE_AIS, "AIS" },
+ { OAM_FM_FUNCTYPE_RDI, "RDI" },
+ { OAM_FM_FUNCTYPE_CONTCHECK, "Continuity Check" },
+ { OAM_FM_FUNCTYPE_LOOPBACK, "Loopback" },
+ { 0, NULL }
+};
+
+static const struct tok oam_pm_functype_values[] = {
+ { 0x0, "Forward Monitoring" },
+ { 0x1, "Backward Reporting" },
+ { 0x2, "Monitoring and Reporting" },
+ { 0, NULL }
+};
-#include "ether.h"
+static const struct tok oam_ad_functype_values[] = {
+ { 0x0, "Performance Monitoring" },
+ { 0x1, "Continuity Check" },
+ { 0, NULL }
+};
+
+#define OAM_FM_LOOPBACK_INDICATOR_MASK 0x1
+
+static const struct tok oam_fm_loopback_indicator_values[] = {
+ { 0x0, "Reply" },
+ { 0x1, "Request" },
+ { 0, NULL }
+};
+
+static const struct uint_tokary oam_celltype2tokary[] = {
+ { OAM_CELLTYPE_FM, oam_fm_functype_values },
+ { OAM_CELLTYPE_PM, oam_pm_functype_values },
+ { OAM_CELLTYPE_AD, oam_ad_functype_values },
+ /* uint2tokary() does not use array termination. */
+};
/*
* Print an RFC 1483 LLC-encapsulated ATM frame.
*/
-static void
-atm_llc_print(const u_char *p, int length, int caplen)
+static u_int
+atm_llc_print(netdissect_options *ndo,
+ const u_char *p, int length, int caplen)
{
- struct ether_header ehdr;
- u_short ether_type;
- u_short extracted_ethertype;
+ int llc_hdrlen;
- ether_type = p[6] << 8 | p[7];
-
- /*
- * Fake up an Ethernet header for the benefit of printers that
- * insist on "packetp" pointing to an Ethernet header.
- */
- memset(&ehdr, '\0', sizeof ehdr);
-
- /*
- * 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.
- */
- snapend = p + caplen;
- /*
- * Actually, the only printers that use packetp are print-arp.c
- * and print-bootp.c, and they assume that packetp points to an
- * Ethernet header. The right thing to do is to fix them to know
- * which link type is in use when they excavate. XXX
- */
- packetp = (u_char *)&ehdr;
-
- if (!llc_print(p, length, caplen, ESRC(&ehdr), EDST(&ehdr),
- &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);
+ llc_hdrlen = llc_print(ndo, p, length, caplen, NULL, NULL);
+ if (llc_hdrlen < 0) {
+ /* packet not known, print raw packet */
+ if (!ndo->ndo_suppress_default_print)
+ ND_DEFAULTPRINT(p, caplen);
+ llc_hdrlen = -llc_hdrlen;
}
+ return (llc_hdrlen);
}
/*
- * 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'
+ * 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->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, const struct pcap_pkthdr *h, const u_char *p)
+atm_if_print(netdissect_options *ndo,
+ const struct pcap_pkthdr *h, const u_char *p)
{
u_int caplen = h->caplen;
u_int length = h->len;
+ uint32_t llchdr;
+ u_int hdrlen = 0;
- ++infodelay;
- ts_print(&h->ts);
+ ndo->ndo_protocol = "atm";
- if (caplen < 8) {
- printf("[|atm]");
- goto out;
- }
- if (p[0] != 0xaa || p[1] != 0xaa || p[2] != 0x03) {
+ /* Cisco Style NLPID ? */
+ if (GET_U_1(p) == LLC_UI) {
+ if (ndo->ndo_eflag)
+ ND_PRINT("CNLPID ");
+ ndo->ndo_ll_hdr_len += 1;
+ isoclns_print(ndo, p + 1, length - 1);
+ return;
+ }
+
+ /*
+ * Must have at least a DSAP, an SSAP, and the first byte of the
+ * control field.
+ */
+
+ /*
+ * 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 = GET_BE_U_3(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("%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]);
+ if (ndo->ndo_eflag)
+ ND_PRINT("%08x%08x %08x%08x ",
+ GET_BE_U_4(p),
+ GET_BE_U_4(p + 4),
+ GET_BE_U_4(p + 8),
+ GET_BE_U_4(p + 12));
+ /* Always cover the full header. */
+ ND_TCHECK_LEN(p, 20);
p += 20;
length -= 20;
caplen -= 20;
+ hdrlen += 20;
}
- atm_llc_print(p, length, caplen);
- if (xflag)
- default_print(p, caplen);
- out:
- putchar('\n');
- --infodelay;
- if (infoprint)
- info(0);
+ ndo->ndo_ll_hdr_len += hdrlen;
+ ndo->ndo_ll_hdr_len += atm_llc_print(ndo, p, length, caplen);
+}
+
+/*
+ * ATM signalling.
+ */
+static const 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(netdissect_options *ndo,
+ const u_char *p)
+{
+ uint32_t call_ref;
+
+ if (GET_U_1(p + PROTO_POS) == Q2931) {
+ /*
+ * protocol:Q.2931 for User to Network Interface
+ * (UNI 3.1) signalling
+ */
+ ND_PRINT("Q.2931");
+ ND_PRINT(":%s ",
+ tok2str(msgtype2str, "msgtype#%u", GET_U_1(p + MSG_TYPE_POS)));
+
+ /*
+ * The call reference comes before the message type,
+ * so if we know we have the message type, which we
+ * do from the caplen test above, we also know we have
+ * the call reference.
+ */
+ call_ref = GET_BE_U_3(p + CALL_REF_POS);
+ ND_PRINT("CALL_REF:0x%06x", call_ref);
+ } else {
+ /* SSCOP with some unknown protocol atop it */
+ ND_PRINT("SSCOP, proto %u ", GET_U_1(p + PROTO_POS));
+ }
+}
+
+/*
+ * Print an ATM PDU (such as an AAL5 PDU).
+ */
+void
+atm_print(netdissect_options *ndo,
+ u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length,
+ u_int caplen)
+{
+ ndo->ndo_protocol = "atm";
+ if (ndo->ndo_eflag)
+ ND_PRINT("VPI:%u VCI:%u ", vpi, vci);
+
+ if (vpi == 0) {
+ switch (vci) {
+
+ case VCI_PPC:
+ sig_print(ndo, p);
+ return;
+
+ case VCI_BCC:
+ ND_PRINT("broadcast sig: ");
+ return;
+
+ case VCI_OAMF4SC: /* fall through */
+ case VCI_OAMF4EC:
+ oam_print(ndo, p, length, ATM_OAM_HEC);
+ return;
+
+ case VCI_METAC:
+ ND_PRINT("meta: ");
+ return;
+
+ case VCI_ILMIC:
+ ND_PRINT("ilmi: ");
+ snmp_print(ndo, p, length);
+ return;
+ }
+ }
+
+ switch (traftype) {
+
+ case ATM_LLC:
+ default:
+ /*
+ * Assumes traffic is LLC if unknown.
+ */
+ atm_llc_print(ndo, p, length, caplen);
+ break;
+
+ case ATM_LANE:
+ lane_print(ndo, p, length, caplen);
+ break;
+ }
+}
+
+struct oam_fm_loopback_t {
+ nd_uint8_t loopback_indicator;
+ nd_uint32_t correlation_tag;
+ nd_byte loopback_id[12];
+ nd_byte source_id[12];
+ nd_byte unused[16];
+};
+
+struct oam_fm_ais_rdi_t {
+ nd_uint8_t failure_type;
+ nd_byte failure_location[16];
+ nd_byte unused[28];
+};
+
+void
+oam_print(netdissect_options *ndo,
+ const u_char *p, u_int length, u_int hec)
+{
+ uint32_t cell_header;
+ uint16_t vpi, vci, cksum, cksum_shouldbe, idx;
+ uint8_t cell_type, func_type, payload, clp;
+ const struct tok *oam_functype_str;
+
+ union {
+ const struct oam_fm_loopback_t *oam_fm_loopback;
+ const struct oam_fm_ais_rdi_t *oam_fm_ais_rdi;
+ } oam_ptr;
+
+ ndo->ndo_protocol = "oam";
+ cell_header = GET_BE_U_4(p + hec);
+ cell_type = (GET_U_1((p + ATM_HDR_LEN_NOHEC + hec)) >> 4) & 0x0f;
+ func_type = GET_U_1((p + ATM_HDR_LEN_NOHEC + hec)) & 0x0f;
+
+ vpi = (cell_header>>20)&0xff;
+ vci = (cell_header>>4)&0xffff;
+ payload = (cell_header>>1)&0x7;
+ clp = cell_header&0x1;
+
+ ND_PRINT("%s, vpi %u, vci %u, payload [ %s ], clp %u, length %u",
+ tok2str(oam_f_values, "OAM F5", vci),
+ vpi, vci,
+ tok2str(atm_pty_values, "Unknown", payload),
+ clp, length);
+
+ if (!ndo->ndo_vflag) {
+ return;
+ }
+
+ ND_PRINT("\n\tcell-type %s (%u)",
+ tok2str(oam_celltype_values, "unknown", cell_type),
+ cell_type);
+
+ oam_functype_str = uint2tokary(oam_celltype2tokary, cell_type);
+ if (oam_functype_str == NULL)
+ ND_PRINT(", func-type unknown (%u)", func_type);
+ else
+ ND_PRINT(", func-type %s (%u)",
+ tok2str(oam_functype_str, "none", func_type),
+ func_type);
+
+ p += ATM_HDR_LEN_NOHEC + hec;
+
+ switch (cell_type << 4 | func_type) {
+ case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_LOOPBACK):
+ oam_ptr.oam_fm_loopback = (const struct oam_fm_loopback_t *)(p + OAM_CELLTYPE_FUNCTYPE_LEN);
+ ND_TCHECK_SIZE(oam_ptr.oam_fm_loopback);
+ ND_PRINT("\n\tLoopback-Indicator %s, Correlation-Tag 0x%08x",
+ tok2str(oam_fm_loopback_indicator_values,
+ "Unknown",
+ GET_U_1(oam_ptr.oam_fm_loopback->loopback_indicator) & OAM_FM_LOOPBACK_INDICATOR_MASK),
+ GET_BE_U_4(oam_ptr.oam_fm_loopback->correlation_tag));
+ ND_PRINT("\n\tLocation-ID ");
+ for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->loopback_id); idx++) {
+ if (idx % 2) {
+ ND_PRINT("%04x ",
+ GET_BE_U_2(&oam_ptr.oam_fm_loopback->loopback_id[idx]));
+ }
+ }
+ ND_PRINT("\n\tSource-ID ");
+ for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->source_id); idx++) {
+ if (idx % 2) {
+ ND_PRINT("%04x ",
+ GET_BE_U_2(&oam_ptr.oam_fm_loopback->source_id[idx]));
+ }
+ }
+ break;
+
+ case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_AIS):
+ case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_RDI):
+ oam_ptr.oam_fm_ais_rdi = (const struct oam_fm_ais_rdi_t *)(p + OAM_CELLTYPE_FUNCTYPE_LEN);
+ ND_TCHECK_SIZE(oam_ptr.oam_fm_ais_rdi);
+ ND_PRINT("\n\tFailure-type 0x%02x",
+ GET_U_1(oam_ptr.oam_fm_ais_rdi->failure_type));
+ ND_PRINT("\n\tLocation-ID ");
+ for (idx = 0; idx < sizeof(oam_ptr.oam_fm_ais_rdi->failure_location); idx++) {
+ if (idx % 2) {
+ ND_PRINT("%04x ",
+ GET_BE_U_2(&oam_ptr.oam_fm_ais_rdi->failure_location[idx]));
+ }
+ }
+ break;
+
+ case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_CONTCHECK):
+ /* FIXME */
+ break;
+
+ default:
+ break;
+ }
+
+ /* crc10 checksum verification */
+ cksum = GET_BE_U_2(p + OAM_CELLTYPE_FUNCTYPE_LEN + OAM_FUNCTION_SPECIFIC_LEN)
+ & OAM_CRC10_MASK;
+ cksum_shouldbe = verify_crc10_cksum(0, p, OAM_PAYLOAD_LEN);
+
+ ND_PRINT("\n\tcksum 0x%03x (%scorrect)",
+ cksum,
+ cksum_shouldbe == 0 ? "" : "in");
}
projects / tcpdump / blobdiff