X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/60a835d80f4b6c12dbe2d38fe4ca2de16f3302dc..d7b497cac78b6e22a66a6bae9bdec60a8044f67a:/print-atm.c diff --git a/print-atm.c b/print-atm.c index 8faf715d..9c4adbc1 100644 --- a/print-atm.c +++ b/print-atm.c @@ -19,20 +19,110 @@ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ -#define NETDISSECT_REWORKED +/* \summary: Asynchronous Transfer Mode (ATM) printer */ + #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include +#include -#include "interface.h" +#include "netdissect.h" #include "extract.h" #include "addrtoname.h" #include "atm.h" -#include "atmuni31.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 @@ -126,22 +216,20 @@ static const struct tok *oam_functype_values[16] = { /* * Print an RFC 1483 LLC-encapsulated ATM frame. */ -static void +static u_int atm_llc_print(netdissect_options *ndo, const u_char *p, int length, int caplen) { - u_short extracted_ethertype; - - if (!llc_print(ndo, p, length, caplen, NULL, NULL, - &extracted_ethertype)) { - /* ether_type not known, print raw packet */ - if (extracted_ethertype) { - ND_PRINT((ndo, "(LLC %s) ", - etherproto_string(htons(extracted_ethertype)))); - } + 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); } /* @@ -174,7 +262,7 @@ atm_if_print(netdissect_options *ndo, if (*p == LLC_UI) { if (ndo->ndo_eflag) ND_PRINT((ndo, "CNLPID ")); - isoclns_print(ndo, p + 1, length - 1, caplen - 1); + isoclns_print(ndo, p + 1, length - 1); return hdrlen; } @@ -194,7 +282,7 @@ atm_if_print(netdissect_options *ndo, * packet nor an RFC 2684 routed NLPID-formatted PDU nor * an 802.2-but-no-SNAP IP packet. */ - llchdr = EXTRACT_24BITS(p); + llchdr = EXTRACT_BE_U_3(p); if (llchdr != LLC_UI_HDR(LLCSAP_SNAP) && llchdr != LLC_UI_HDR(LLCSAP_ISONS) && llchdr != LLC_UI_HDR(LLCSAP_IP)) { @@ -220,16 +308,16 @@ atm_if_print(netdissect_options *ndo, } 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))); + EXTRACT_BE_U_4(p), + EXTRACT_BE_U_4(p + 4), + EXTRACT_BE_U_4(p + 8), + EXTRACT_BE_U_4(p + 12))); p += 20; length -= 20; caplen -= 20; hdrlen += 20; } - atm_llc_print(ndo, p, length, caplen); + hdrlen += atm_llc_print(ndo, p, length, caplen); return (hdrlen); } @@ -257,26 +345,20 @@ static const struct tok msgtype2str[] = { static void sig_print(netdissect_options *ndo, - const u_char *p, int caplen) + const u_char *p) { uint32_t call_ref; - if (caplen < PROTO_POS) { - ND_PRINT((ndo, "%s", tstr)); - return; - } + ND_TCHECK(p[PROTO_POS]); 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_TCHECK(p[MSG_TYPE_POS]); ND_PRINT((ndo, ":%s ", - tok2str(msgtype2str, "msgtype#%d", p[MSG_TYPE_POS]))); + tok2str(msgtype2str, "msgtype#%d", EXTRACT_U_1(p + MSG_TYPE_POS)))); /* * The call reference comes before the message type, @@ -284,12 +366,16 @@ sig_print(netdissect_options *ndo, * do from the caplen test above, we also know we have * the call reference. */ - call_ref = EXTRACT_24BITS(&p[CALL_REF_POS]); + call_ref = EXTRACT_BE_U_3(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])); + /* SSCOP with some unknown protocol atop it */ + ND_PRINT((ndo, "SSCOP, proto %d ", EXTRACT_U_1(p + PROTO_POS))); } + return; + +trunc: + ND_PRINT((ndo, " %s", tstr)); } /* @@ -307,7 +393,7 @@ atm_print(netdissect_options *ndo, switch (vci) { case VCI_PPC: - sig_print(ndo, p, caplen); + sig_print(ndo, p); return; case VCI_BCC: @@ -360,7 +446,7 @@ struct oam_fm_ais_rdi_t { uint8_t unused[28]; }; -int +void oam_print (netdissect_options *ndo, const u_char *p, u_int length, u_int hec) { @@ -374,9 +460,10 @@ oam_print (netdissect_options *ndo, } 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; + ND_TCHECK(*(p+ATM_HDR_LEN_NOHEC+hec)); + cell_header = EXTRACT_BE_U_4(p + hec); + cell_type = (EXTRACT_U_1((p + ATM_HDR_LEN_NOHEC + hec)) >> 4) & 0x0f; + func_type = EXTRACT_U_1((p + ATM_HDR_LEN_NOHEC + hec)) & 0x0f; vpi = (cell_header>>20)&0xff; vci = (cell_header>>4)&0xffff; @@ -390,7 +477,7 @@ oam_print (netdissect_options *ndo, clp, length)); if (!ndo->ndo_vflag) { - return 1; + return; } ND_PRINT((ndo, "\n\tcell-type %s (%u)", @@ -409,21 +496,22 @@ oam_print (netdissect_options *ndo, 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))); + EXTRACT_BE_U_4(&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, "%04x ", EXTRACT_BE_U_2(&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]))); + ND_PRINT((ndo, "%04x ", EXTRACT_BE_U_2(&oam_ptr.oam_fm_loopback->source_id[idx]))); } } break; @@ -431,11 +519,12 @@ oam_print (netdissect_options *ndo, 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]))); + ND_PRINT((ndo, "%04x ", EXTRACT_BE_U_2(&oam_ptr.oam_fm_ais_rdi->failure_location[idx]))); } } break; @@ -449,7 +538,8 @@ oam_print (netdissect_options *ndo, } /* crc10 checksum verification */ - cksum = EXTRACT_16BITS(p + OAM_CELLTYPE_FUNCTYPE_LEN + OAM_FUNCTION_SPECIFIC_LEN) + ND_TCHECK_2(p + OAM_CELLTYPE_FUNCTYPE_LEN + OAM_FUNCTION_SPECIFIC_LEN); + cksum = EXTRACT_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); @@ -457,5 +547,9 @@ oam_print (netdissect_options *ndo, cksum, cksum_shouldbe == 0 ? "" : "in")); - return 1; + return; + +trunc: + ND_PRINT((ndo, "[|oam]")); + return; }