| /* |
| * Copyright (c) 1994, 1995, 1996, 1997 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that: (1) source code distributions |
| * retain the above copyright notice and this paragraph in its entirety, (2) |
| * distributions including binary code include the above copyright notice and |
| * this paragraph in its entirety in the documentation or other materials |
| * provided with the distribution, and (3) all advertising materials mentioning |
| * features or use of this software display the following acknowledgement: |
| * ``This product includes software developed by the University of California, |
| * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of |
| * the University nor the names of its contributors may be used to endorse |
| * or promote products derived from this software without specific prior |
| * written permission. |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| */ |
| |
| /* \summary: Asynchronous Transfer Mode (ATM) printer */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <netdissect-stdinc.h> |
| |
| #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 nmber */ |
| |
| #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 */ |
| #define MSG_LEN_POS 7 /* offset of mesage 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 |
| |
| /* end of the original atmuni31.h */ |
| |
| static const char tstr[] = "[|atm]"; |
| |
| #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 |
| |
| 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 } |
| }; |
| |
| 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 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 u_int |
| atm_llc_print(netdissect_options *ndo, |
| const u_char *p, int length, int caplen) |
| { |
| int llc_hdrlen; |
| |
| 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); |
| } |
| |
| /* |
| * 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. |
| */ |
| u_int |
| 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; |
| |
| if (caplen < 1 || length < 1) { |
| ND_PRINT((ndo, "%s", tstr)); |
| return (caplen); |
| } |
| |
| /* Cisco Style NLPID ? */ |
| if (*p == LLC_UI) { |
| if (ndo->ndo_eflag) |
| ND_PRINT((ndo, "CNLPID ")); |
| isoclns_print(ndo, p + 1, length - 1, caplen - 1); |
| return hdrlen; |
| } |
| |
| /* |
| * Must have at least a DSAP, an SSAP, and the first byte of the |
| * control field. |
| */ |
| if (caplen < 3 || length < 3) { |
| ND_PRINT((ndo, "%s", tstr)); |
| return (caplen); |
| } |
| |
| /* |
| * 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 (caplen < 20 || length < 20) { |
| ND_PRINT((ndo, "%s", tstr)); |
| return (caplen); |
| } |
| if (ndo->ndo_eflag) |
| ND_PRINT((ndo, "%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; |
| } |
| hdrlen += atm_llc_print(ndo, p, length, caplen); |
| return (hdrlen); |
| } |
| |
| /* |
| * 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, int caplen) |
| { |
| uint32_t call_ref; |
| |
| if (caplen < PROTO_POS) { |
| ND_PRINT((ndo, "%s", tstr)); |
| return; |
| } |
| if (p[PROTO_POS] == Q2931) { |
| /* |
| * protocol:Q.2931 for User to Network Interface |
| * (UNI 3.1) signalling |
| */ |
| ND_PRINT((ndo, "Q.2931")); |
| if (caplen < MSG_TYPE_POS) { |
| ND_PRINT((ndo, " %s", tstr)); |
| return; |
| } |
| ND_PRINT((ndo, ":%s ", |
| tok2str(msgtype2str, "msgtype#%d", 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 = EXTRACT_24BITS(&p[CALL_REF_POS]); |
| ND_PRINT((ndo, "CALL_REF:0x%06x", call_ref)); |
| } else { |
| /* SCCOP with some unknown protocol atop it */ |
| ND_PRINT((ndo, "SSCOP, proto %d ", 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) |
| { |
| if (ndo->ndo_eflag) |
| ND_PRINT((ndo, "VPI:%u VCI:%u ", vpi, vci)); |
| |
| if (vpi == 0) { |
| switch (vci) { |
| |
| case VCI_PPC: |
| sig_print(ndo, p, caplen); |
| return; |
| |
| case VCI_BCC: |
| ND_PRINT((ndo, "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((ndo, "meta: ")); |
| return; |
| |
| case VCI_ILMIC: |
| ND_PRINT((ndo, "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 { |
| uint8_t loopback_indicator; |
| uint8_t correlation_tag[4]; |
| uint8_t loopback_id[12]; |
| uint8_t source_id[12]; |
| uint8_t unused[16]; |
| }; |
| |
| struct oam_fm_ais_rdi_t { |
| uint8_t failure_type; |
| uint8_t failure_location[16]; |
| uint8_t 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; |
| |
| union { |
| const struct oam_fm_loopback_t *oam_fm_loopback; |
| const struct oam_fm_ais_rdi_t *oam_fm_ais_rdi; |
| } oam_ptr; |
| |
| |
| ND_TCHECK(*(p+ATM_HDR_LEN_NOHEC+hec)); |
| cell_header = EXTRACT_32BITS(p+hec); |
| cell_type = ((*(p+ATM_HDR_LEN_NOHEC+hec))>>4) & 0x0f; |
| func_type = (*(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((ndo, "%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((ndo, "\n\tcell-type %s (%u)", |
| tok2str(oam_celltype_values, "unknown", cell_type), |
| cell_type)); |
| |
| if (oam_functype_values[cell_type] == NULL) |
| ND_PRINT((ndo, ", func-type unknown (%u)", func_type)); |
| else |
| ND_PRINT((ndo, ", func-type %s (%u)", |
| tok2str(oam_functype_values[cell_type],"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(*oam_ptr.oam_fm_loopback); |
| ND_PRINT((ndo, "\n\tLoopback-Indicator %s, Correlation-Tag 0x%08x", |
| tok2str(oam_fm_loopback_indicator_values, |
| "Unknown", |
| oam_ptr.oam_fm_loopback->loopback_indicator & OAM_FM_LOOPBACK_INDICATOR_MASK), |
| EXTRACT_32BITS(&oam_ptr.oam_fm_loopback->correlation_tag))); |
| ND_PRINT((ndo, "\n\tLocation-ID ")); |
| for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->loopback_id); idx++) { |
| if (idx % 2) { |
| ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_loopback->loopback_id[idx]))); |
| } |
| } |
| ND_PRINT((ndo, "\n\tSource-ID ")); |
| for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->source_id); idx++) { |
| if (idx % 2) { |
| ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&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(*oam_ptr.oam_fm_ais_rdi); |
| ND_PRINT((ndo, "\n\tFailure-type 0x%02x", oam_ptr.oam_fm_ais_rdi->failure_type)); |
| ND_PRINT((ndo, "\n\tLocation-ID ")); |
| for (idx = 0; idx < sizeof(oam_ptr.oam_fm_ais_rdi->failure_location); idx++) { |
| if (idx % 2) { |
| ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&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 */ |
| ND_TCHECK2(*(p + OAM_CELLTYPE_FUNCTYPE_LEN + OAM_FUNCTION_SPECIFIC_LEN), 2); |
| cksum = EXTRACT_16BITS(p + OAM_CELLTYPE_FUNCTYPE_LEN + OAM_FUNCTION_SPECIFIC_LEN) |
| & OAM_CRC10_MASK; |
| cksum_shouldbe = verify_crc10_cksum(0, p, OAM_PAYLOAD_LEN); |
| |
| ND_PRINT((ndo, "\n\tcksum 0x%03x (%scorrect)", |
| cksum, |
| cksum_shouldbe == 0 ? "" : "in")); |
| |
| return; |
| |
| trunc: |
| ND_PRINT((ndo, "[|oam]")); |
| return; |
| } |