diff options
Diffstat (limited to '')
| -rw-r--r-- | print-atm.c | 530 |
1 files changed, 530 insertions, 0 deletions
diff --git a/print-atm.c b/print-atm.c new file mode 100644 index 0000000..904fc47 --- /dev/null +++ b/print-atm.c @@ -0,0 +1,530 @@ +/* + * 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" + +#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 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 */ +#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 + +/* end of the original atmuni31.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 + +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 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 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. + */ +void +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; + + ndo->ndo_protocol = "atm"; + + /* 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. + * + * 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 (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; + } + 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"); +} |