X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/3fa2cd2e2afd791d290d20ea861a61c7b10067fd..refs/pull/482/head:/print-atm.c diff --git a/print-atm.c b/print-atm.c index 9623ea71..7489158b 100644 --- a/print-atm.c +++ b/print-atm.c @@ -18,117 +18,530 @@ * 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" #endif -#include -#include -#include +#include -#include +#include "netdissect.h" +#include "extract.h" +#include "addrtoname.h" +#include "atm.h" +#include "llc.h" -#include -#include -#include +/* start of the original atmuni31.h */ -#include "interface.h" -#include "addrtoname.h" -#include "ethertype.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 -#include "ether.h" +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 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]; + 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); +} - /* - * Fake up an Ethernet header for the benefit of printers that - * insist on "packetp" pointing to an Ethernet header. - */ - memset(&ehdr, '\0', sizeof ehdr); +/* + * 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; + } /* - * 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. + * Must have at least a DSAP, an SSAP, and the first byte of the + * control field. */ - snapend = p + caplen; + if (caplen < 3 || length < 3) { + ND_PRINT((ndo, "%s", tstr)); + return (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 + * 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. */ - 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))); + 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 (!xflag && !qflag) - default_print(p, 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); } /* - * 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' - * is the number of bytes actually captured. + * 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_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p) +atm_print(netdissect_options *ndo, + u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length, + u_int caplen) { - u_int caplen = h->caplen; - u_int length = h->len; + if (ndo->ndo_eflag) + ND_PRINT((ndo, "VPI:%u VCI:%u ", vpi, vci)); + + if (vpi == 0) { + switch (vci) { - ++infodelay; - ts_print(&h->ts); + case VCI_PPC: + sig_print(ndo, p, caplen); + return; - if (caplen < 8) { - printf("[|atm]"); - goto out; + 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; + } } - if (p[0] != 0xaa || p[1] != 0xaa || p[2] != 0x03) { + + switch (traftype) { + + case ATM_LLC: + default: /* - * 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? + * Assumes traffic is LLC if unknown. */ - 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]); - p += 20; - length -= 20; - caplen -= 20; + atm_llc_print(ndo, p, length, caplen); + break; + + case ATM_LANE: + lane_print(ndo, p, length, caplen); + break; } - atm_llc_print(p, length, caplen); - if (xflag) - default_print(p, caplen); - out: - putchar('\n'); - --infodelay; - if (infoprint) - info(0); +} + +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; }