/* * 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. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #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]; }; int 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; 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 1; } 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_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_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 */ 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 1; }