From 81ceab7147ecaac14fa1889cdb461205e1002393 Mon Sep 17 00:00:00 2001 From: Rui Paulo Date: Fri, 20 Mar 2009 13:27:51 +0000 Subject: Flatten vendor/tcpdump and remove keyword expansion. --- print-fr.c | 855 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 855 insertions(+) create mode 100644 print-fr.c (limited to 'print-fr.c') diff --git a/print-fr.c b/print-fr.c new file mode 100644 index 000000000000..b53a88bdc894 --- /dev/null +++ b/print-fr.c @@ -0,0 +1,855 @@ +/* + * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996 + * 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. + */ + +#ifndef lint +static const char rcsid[] _U_ = + "@(#)$Header: /tcpdump/master/tcpdump/print-fr.c,v 1.32.2.15 2006/02/01 14:39:56 hannes Exp $ (LBL)"; +#endif + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include + +#include +#include +#include + +#include "addrtoname.h" +#include "interface.h" +#include "ethertype.h" +#include "nlpid.h" +#include "extract.h" +#include "oui.h" + +static void frf15_print(const u_char *, u_int); + +/* + * the frame relay header has a variable length + * + * the EA bit determines if there is another byte + * in the header + * + * minimum header length is 2 bytes + * maximum header length is 4 bytes + * + * 7 6 5 4 3 2 1 0 + * +----+----+----+----+----+----+----+----+ + * | DLCI (6 bits) | CR | EA | + * +----+----+----+----+----+----+----+----+ + * | DLCI (4 bits) |FECN|BECN| DE | EA | + * +----+----+----+----+----+----+----+----+ + * | DLCI (7 bits) | EA | + * +----+----+----+----+----+----+----+----+ + * | DLCI (6 bits) |SDLC| EA | + * +----+----+----+----+----+----+----+----+ + */ + +#define FR_EA_BIT 0x01 + +#define FR_CR_BIT 0x02000000 +#define FR_DE_BIT 0x00020000 +#define FR_BECN_BIT 0x00040000 +#define FR_FECN_BIT 0x00080000 +#define FR_SDLC_BIT 0x00000002 + + +struct tok fr_header_flag_values[] = { + { FR_CR_BIT, "C!" }, + { FR_DE_BIT, "DE" }, + { FR_BECN_BIT, "BECN" }, + { FR_FECN_BIT, "FECN" }, + { FR_SDLC_BIT, "sdlcore" }, + { 0, NULL } +}; + +/* FRF.15 / FRF.16 */ +#define MFR_B_BIT 0x80 +#define MFR_E_BIT 0x40 +#define MFR_C_BIT 0x20 +#define MFR_BEC_MASK (MFR_B_BIT | MFR_E_BIT | MFR_C_BIT) +#define MFR_CTRL_FRAME (MFR_B_BIT | MFR_E_BIT | MFR_C_BIT) +#define MFR_FRAG_FRAME (MFR_B_BIT | MFR_E_BIT ) + +struct tok frf_flag_values[] = { + { MFR_B_BIT, "Begin" }, + { MFR_E_BIT, "End" }, + { MFR_C_BIT, "Control" }, + { 0, NULL } +}; + +/* Finds out Q.922 address length, DLCI and flags. Returns 0 on success + * save the flags dep. on address length + */ +static int parse_q922_addr(const u_char *p, u_int *dlci, u_int *sdlcore, + u_int *addr_len, u_int8_t *flags) +{ + if ((p[0] & FR_EA_BIT)) + return -1; + + *addr_len = 2; + *dlci = ((p[0] & 0xFC) << 2) | ((p[1] & 0xF0) >> 4); + + flags[0] = p[0] & 0x02; /* populate the first flag fields */ + flags[1] = p[1] & 0x0c; + flags[2] = 0; /* clear the rest of the flags */ + flags[3] = 0; + + if (p[1] & FR_EA_BIT) + return 0; /* 2-byte Q.922 address */ + + p += 2; + (*addr_len)++; /* 3- or 4-byte Q.922 address */ + if ((p[0] & FR_EA_BIT) == 0) { + *dlci = (*dlci << 7) | (p[0] >> 1); + (*addr_len)++; /* 4-byte Q.922 address */ + p++; + } + + if ((p[0] & FR_EA_BIT) == 0) + return -1; /* more than 4 bytes of Q.922 address? */ + + flags[3] = p[0] & 0x02; + + if (p[0] & 0x02) + *sdlcore = p[0] >> 2; + else + *dlci = (*dlci << 6) | (p[0] >> 2); + + return 0; +} + +/* Frame Relay packet structure, with flags and CRC removed + + +---------------------------+ + | Q.922 Address* | + +-- --+ + | | + +---------------------------+ + | Control (UI = 0x03) | + +---------------------------+ + | Optional Pad (0x00) | + +---------------------------+ + | NLPID | + +---------------------------+ + | . | + | . | + | . | + | Data | + | . | + | . | + +---------------------------+ + + * Q.922 addresses, as presently defined, are two octets and + contain a 10-bit DLCI. In some networks Q.922 addresses + may optionally be increased to three or four octets. +*/ + +static u_int +fr_hdrlen(const u_char *p, u_int addr_len) +{ + if (!p[addr_len + 1] /* pad exist */) + return addr_len + 1 /* UI */ + 1 /* pad */ + 1 /* NLPID */; + else + return addr_len + 1 /* UI */ + 1 /* NLPID */; +} + +static void +fr_hdr_print(int length, u_int addr_len, u_int dlci, u_int8_t *flags, u_int16_t nlpid) +{ + if (qflag) { + (void)printf("Q.922, DLCI %u, length %u: ", + dlci, + length); + } else { + if (nlpid <= 0xff) /* if its smaller than 256 then its a NLPID */ + (void)printf("Q.922, hdr-len %u, DLCI %u, Flags [%s], NLPID %s (0x%02x), length %u: ", + addr_len, + dlci, + bittok2str(fr_header_flag_values, "none", EXTRACT_32BITS(flags)), + tok2str(nlpid_values,"unknown", nlpid), + nlpid, + length); + else /* must be an ethertype */ + (void)printf("Q.922, hdr-len %u, DLCI %u, Flags [%s], cisco-ethertype %s (0x%04x), length %u: ", + addr_len, + dlci, + bittok2str(fr_header_flag_values, "none", EXTRACT_32BITS(flags)), + tok2str(ethertype_values, "unknown", nlpid), + nlpid, + length); + } +} + +u_int +fr_if_print(const struct pcap_pkthdr *h, register const u_char *p) +{ + register u_int length = h->len; + register u_int caplen = h->caplen; + + TCHECK2(*p, 4); /* minimum frame header length */ + + if ((length = fr_print(p, length)) == 0) + return (0); + else + return length; + trunc: + printf("[|fr]"); + return caplen; +} + +u_int +fr_print(register const u_char *p, u_int length) +{ + u_int16_t extracted_ethertype; + u_int dlci; + u_int sdlcore; + u_int addr_len; + u_int16_t nlpid; + u_int hdr_len; + u_int8_t flags[4]; + + if (parse_q922_addr(p, &dlci, &sdlcore, &addr_len, flags)) { + printf("Q.922, invalid address"); + return 0; + } + + TCHECK2(*p,addr_len+1+1); + hdr_len = fr_hdrlen(p, addr_len); + TCHECK2(*p,hdr_len); + + if (p[addr_len] != 0x03 && dlci != 0) { + + /* lets figure out if we have cisco style encapsulation: */ + extracted_ethertype = EXTRACT_16BITS(p+addr_len); + + if (eflag) + fr_hdr_print(length, addr_len, dlci, flags, extracted_ethertype); + + if (ether_encap_print(extracted_ethertype, + p+addr_len+ETHERTYPE_LEN, + length-addr_len-ETHERTYPE_LEN, + length-addr_len-ETHERTYPE_LEN, + &extracted_ethertype) == 0) + /* ether_type not known, probably it wasn't one */ + printf("UI %02x! ", p[addr_len]); + else + return hdr_len; + } + + if (!p[addr_len + 1]) { /* pad byte should be used with 3-byte Q.922 */ + if (addr_len != 3) + printf("Pad! "); + } else if (addr_len == 3) + printf("No pad! "); + + nlpid = p[hdr_len - 1]; + + if (eflag) + fr_hdr_print(length, addr_len, dlci, flags, nlpid); + p += hdr_len; + length -= hdr_len; + + switch (nlpid) { + case NLPID_IP: + ip_print(gndo, p, length); + break; + +#ifdef INET6 + case NLPID_IP6: + ip6_print(p, length); + break; +#endif + case NLPID_CLNP: + case NLPID_ESIS: + case NLPID_ISIS: + isoclns_print(p-1, length+1, length+1); /* OSI printers need the NLPID field */ + break; + + case NLPID_SNAP: + if (snap_print(p, length, length, &extracted_ethertype, 0) == 0) { + /* ether_type not known, print raw packet */ + if (!eflag) + fr_hdr_print(length + hdr_len, hdr_len, + dlci, flags, nlpid); + if (!suppress_default_print) + default_print(p - hdr_len, length + hdr_len); + } + break; + + case NLPID_Q933: + q933_print(p, length); + break; + + case NLPID_MFR: + frf15_print(p, length); + break; + + case NLPID_PPP: + ppp_print(p, length); + break; + + default: + if (!eflag) + fr_hdr_print(length + hdr_len, addr_len, + dlci, flags, nlpid); + if (!xflag) + default_print(p, length); + } + + return hdr_len; + + trunc: + printf("[|fr]"); + return 0; + +} + +u_int +mfr_if_print(const struct pcap_pkthdr *h, register const u_char *p) +{ + register u_int length = h->len; + register u_int caplen = h->caplen; + + TCHECK2(*p, 2); /* minimum frame header length */ + + if ((length = mfr_print(p, length)) == 0) + return (0); + else + return length; + trunc: + printf("[|mfr]"); + return caplen; +} + + +#define MFR_CTRL_MSG_ADD_LINK 1 +#define MFR_CTRL_MSG_ADD_LINK_ACK 2 +#define MFR_CTRL_MSG_ADD_LINK_REJ 3 +#define MFR_CTRL_MSG_HELLO 4 +#define MFR_CTRL_MSG_HELLO_ACK 5 +#define MFR_CTRL_MSG_REMOVE_LINK 6 +#define MFR_CTRL_MSG_REMOVE_LINK_ACK 7 + +struct tok mfr_ctrl_msg_values[] = { + { MFR_CTRL_MSG_ADD_LINK, "Add Link" }, + { MFR_CTRL_MSG_ADD_LINK_ACK, "Add Link ACK" }, + { MFR_CTRL_MSG_ADD_LINK_REJ, "Add Link Reject" }, + { MFR_CTRL_MSG_HELLO, "Hello" }, + { MFR_CTRL_MSG_HELLO_ACK, "Hello ACK" }, + { MFR_CTRL_MSG_REMOVE_LINK, "Remove Link" }, + { MFR_CTRL_MSG_REMOVE_LINK_ACK, "Remove Link ACK" }, + { 0, NULL } +}; + +#define MFR_CTRL_IE_BUNDLE_ID 1 +#define MFR_CTRL_IE_LINK_ID 2 +#define MFR_CTRL_IE_MAGIC_NUM 3 +#define MFR_CTRL_IE_TIMESTAMP 5 +#define MFR_CTRL_IE_VENDOR_EXT 6 +#define MFR_CTRL_IE_CAUSE 7 + +struct tok mfr_ctrl_ie_values[] = { + { MFR_CTRL_IE_BUNDLE_ID, "Bundle ID"}, + { MFR_CTRL_IE_LINK_ID, "Link ID"}, + { MFR_CTRL_IE_MAGIC_NUM, "Magic Number"}, + { MFR_CTRL_IE_TIMESTAMP, "Timestamp"}, + { MFR_CTRL_IE_VENDOR_EXT, "Vendor Extension"}, + { MFR_CTRL_IE_CAUSE, "Cause"}, + { 0, NULL } +}; + +#define MFR_ID_STRING_MAXLEN 50 + +struct ie_tlv_header_t { + u_int8_t ie_type; + u_int8_t ie_len; +}; + +u_int +mfr_print(register const u_char *p, u_int length) +{ + u_int tlen,idx,hdr_len = 0; + u_int16_t sequence_num; + u_int8_t ie_type,ie_len; + const u_int8_t *tptr; + + +/* + * FRF.16 Link Integrity Control Frame + * + * 7 6 5 4 3 2 1 0 + * +----+----+----+----+----+----+----+----+ + * | B | E | C=1| 0 0 0 0 | EA | + * +----+----+----+----+----+----+----+----+ + * | 0 0 0 0 0 0 0 0 | + * +----+----+----+----+----+----+----+----+ + * | message type | + * +----+----+----+----+----+----+----+----+ + */ + + TCHECK2(*p, 4); /* minimum frame header length */ + + if ((p[0] & MFR_BEC_MASK) == MFR_CTRL_FRAME && p[1] == 0) { + printf("FRF.16 Control, Flags [%s], %s, length %u", + bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK)), + tok2str(mfr_ctrl_msg_values,"Unknown Message (0x%02x)",p[2]), + length); + tptr = p + 3; + tlen = length -3; + hdr_len = 3; + + if (!vflag) + return hdr_len; + + while (tlen>sizeof(struct ie_tlv_header_t)) { + TCHECK2(*tptr, sizeof(struct ie_tlv_header_t)); + ie_type=tptr[0]; + ie_len=tptr[1]; + + printf("\n\tIE %s (%u), length %u: ", + tok2str(mfr_ctrl_ie_values,"Unknown",ie_type), + ie_type, + ie_len); + + /* infinite loop check */ + if (ie_type == 0 || ie_len <= sizeof(struct ie_tlv_header_t)) + return hdr_len; + + TCHECK2(*tptr,ie_len); + tptr+=sizeof(struct ie_tlv_header_t); + /* tlv len includes header */ + ie_len-=sizeof(struct ie_tlv_header_t); + tlen-=sizeof(struct ie_tlv_header_t); + + switch (ie_type) { + + case MFR_CTRL_IE_MAGIC_NUM: + printf("0x%08x",EXTRACT_32BITS(tptr)); + break; + + case MFR_CTRL_IE_BUNDLE_ID: /* same message format */ + case MFR_CTRL_IE_LINK_ID: + for (idx = 0; idx < ie_len && idx < MFR_ID_STRING_MAXLEN; idx++) { + if (*(tptr+idx) != 0) /* don't print null termination */ + safeputchar(*(tptr+idx)); + else + break; + } + break; + + case MFR_CTRL_IE_TIMESTAMP: + if (ie_len == sizeof(struct timeval)) { + ts_print((const struct timeval *)tptr); + break; + } + /* fall through and hexdump if no unix timestamp */ + + /* + * FIXME those are the defined IEs that lack a decoder + * you are welcome to contribute code ;-) + */ + + case MFR_CTRL_IE_VENDOR_EXT: + case MFR_CTRL_IE_CAUSE: + + default: + if (vflag <= 1) + print_unknown_data(tptr,"\n\t ",ie_len); + break; + } + + /* do we want to see a hexdump of the IE ? */ + if (vflag > 1 ) + print_unknown_data(tptr,"\n\t ",ie_len); + + tlen-=ie_len; + tptr+=ie_len; + } + return hdr_len; + } +/* + * FRF.16 Fragmentation Frame + * + * 7 6 5 4 3 2 1 0 + * +----+----+----+----+----+----+----+----+ + * | B | E | C=0|seq. (high 4 bits) | EA | + * +----+----+----+----+----+----+----+----+ + * | sequence (low 8 bits) | + * +----+----+----+----+----+----+----+----+ + * | DLCI (6 bits) | CR | EA | + * +----+----+----+----+----+----+----+----+ + * | DLCI (4 bits) |FECN|BECN| DE | EA | + * +----+----+----+----+----+----+----+----+ + */ + + sequence_num = (p[0]&0x1e)<<7 | p[1]; + /* whole packet or first fragment ? */ + if ((p[0] & MFR_BEC_MASK) == MFR_FRAG_FRAME || + (p[0] & MFR_BEC_MASK) == MFR_B_BIT) { + printf("FRF.16 Frag, seq %u, Flags [%s], ", + sequence_num, + bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK))); + hdr_len = 2; + fr_print(p+hdr_len,length-hdr_len); + return hdr_len; + } + + /* must be a middle or the last fragment */ + printf("FRF.16 Frag, seq %u, Flags [%s]", + sequence_num, + bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK))); + print_unknown_data(p,"\n\t",length); + + return hdr_len; + + trunc: + printf("[|mfr]"); + return length; +} + +/* an NLPID of 0xb1 indicates a 2-byte + * FRF.15 header + * + * 7 6 5 4 3 2 1 0 + * +----+----+----+----+----+----+----+----+ + * ~ Q.922 header ~ + * +----+----+----+----+----+----+----+----+ + * | NLPID (8 bits) | NLPID=0xb1 + * +----+----+----+----+----+----+----+----+ + * | B | E | C |seq. (high 4 bits) | R | + * +----+----+----+----+----+----+----+----+ + * | sequence (low 8 bits) | + * +----+----+----+----+----+----+----+----+ + */ + +#define FR_FRF15_FRAGTYPE 0x01 + +static void +frf15_print (const u_char *p, u_int length) { + + u_int16_t sequence_num, flags; + + flags = p[0]&MFR_BEC_MASK; + sequence_num = (p[0]&0x1e)<<7 | p[1]; + + printf("FRF.15, seq 0x%03x, Flags [%s],%s Fragmentation, length %u", + sequence_num, + bittok2str(frf_flag_values,"none",flags), + p[0]&FR_FRF15_FRAGTYPE ? "Interface" : "End-to-End", + length); + +/* TODO: + * depending on all permutations of the B, E and C bit + * dig as deep as we can - e.g. on the first (B) fragment + * there is enough payload to print the IP header + * on non (B) fragments it depends if the fragmentation + * model is end-to-end or interface based wether we want to print + * another Q.922 header + */ + +} + +/* + * Q.933 decoding portion for framerelay specific. + */ + +/* Q.933 packet format + Format of Other Protocols + using Q.933 NLPID + +-------------------------------+ + | Q.922 Address | + +---------------+---------------+ + |Control 0x03 | NLPID 0x08 | + +---------------+---------------+ + | L2 Protocol ID | + | octet 1 | octet 2 | + +-------------------------------+ + | L3 Protocol ID | + | octet 2 | octet 2 | + +-------------------------------+ + | Protocol Data | + +-------------------------------+ + | FCS | + +-------------------------------+ + */ + +/* L2 (Octet 1)- Call Reference Usually is 0x0 */ + +/* + * L2 (Octet 2)- Message Types definition 1 byte long. + */ +/* Call Establish */ +#define MSG_TYPE_ESC_TO_NATIONAL 0x00 +#define MSG_TYPE_ALERT 0x01 +#define MSG_TYPE_CALL_PROCEEDING 0x02 +#define MSG_TYPE_CONNECT 0x07 +#define MSG_TYPE_CONNECT_ACK 0x0F +#define MSG_TYPE_PROGRESS 0x03 +#define MSG_TYPE_SETUP 0x05 +/* Call Clear */ +#define MSG_TYPE_DISCONNECT 0x45 +#define MSG_TYPE_RELEASE 0x4D +#define MSG_TYPE_RELEASE_COMPLETE 0x5A +#define MSG_TYPE_RESTART 0x46 +#define MSG_TYPE_RESTART_ACK 0x4E +/* Status */ +#define MSG_TYPE_STATUS 0x7D +#define MSG_TYPE_STATUS_ENQ 0x75 + +struct tok fr_q933_msg_values[] = { + { MSG_TYPE_ESC_TO_NATIONAL, "ESC to National" }, + { MSG_TYPE_ALERT, "Alert" }, + { MSG_TYPE_CALL_PROCEEDING, "Call proceeding" }, + { MSG_TYPE_CONNECT, "Connect" }, + { MSG_TYPE_CONNECT_ACK, "Connect ACK" }, + { MSG_TYPE_PROGRESS, "Progress" }, + { MSG_TYPE_SETUP, "Setup" }, + { MSG_TYPE_DISCONNECT, "Disconnect" }, + { MSG_TYPE_RELEASE, "Release" }, + { MSG_TYPE_RELEASE_COMPLETE, "Release Complete" }, + { MSG_TYPE_RESTART, "Restart" }, + { MSG_TYPE_RESTART_ACK, "Restart ACK" }, + { MSG_TYPE_STATUS, "Status Reply" }, + { MSG_TYPE_STATUS_ENQ, "Status Enquiry" }, + { 0, NULL } +}; + +#define MSG_ANSI_LOCKING_SHIFT 0x95 + +#define FR_LMI_ANSI_REPORT_TYPE_IE 0x01 +#define FR_LMI_ANSI_LINK_VERIFY_IE_91 0x19 /* details? */ +#define FR_LMI_ANSI_LINK_VERIFY_IE 0x03 +#define FR_LMI_ANSI_PVC_STATUS_IE 0x07 + +#define FR_LMI_CCITT_REPORT_TYPE_IE 0x51 +#define FR_LMI_CCITT_LINK_VERIFY_IE 0x53 +#define FR_LMI_CCITT_PVC_STATUS_IE 0x57 + +struct tok fr_q933_ie_values_codeset5[] = { + { FR_LMI_ANSI_REPORT_TYPE_IE, "ANSI Report Type" }, + { FR_LMI_ANSI_LINK_VERIFY_IE_91, "ANSI Link Verify" }, + { FR_LMI_ANSI_LINK_VERIFY_IE, "ANSI Link Verify" }, + { FR_LMI_ANSI_PVC_STATUS_IE, "ANSI PVC Status" }, + { FR_LMI_CCITT_REPORT_TYPE_IE, "CCITT Report Type" }, + { FR_LMI_CCITT_LINK_VERIFY_IE, "CCITT Link Verify" }, + { FR_LMI_CCITT_PVC_STATUS_IE, "CCITT PVC Status" }, + { 0, NULL } +}; + +#define FR_LMI_REPORT_TYPE_IE_FULL_STATUS 0 +#define FR_LMI_REPORT_TYPE_IE_LINK_VERIFY 1 +#define FR_LMI_REPORT_TYPE_IE_ASYNC_PVC 2 + +struct tok fr_lmi_report_type_ie_values[] = { + { FR_LMI_REPORT_TYPE_IE_FULL_STATUS, "Full Status" }, + { FR_LMI_REPORT_TYPE_IE_LINK_VERIFY, "Link verify" }, + { FR_LMI_REPORT_TYPE_IE_ASYNC_PVC, "Async PVC Status" }, + { 0, NULL } +}; + +/* array of 16 codepages - currently we only support codepage 1,5 */ +static struct tok *fr_q933_ie_codesets[] = { + NULL, + fr_q933_ie_values_codeset5, + NULL, + NULL, + NULL, + fr_q933_ie_values_codeset5, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL +}; + +static int fr_q933_print_ie_codeset5(const struct ie_tlv_header_t *ie_p, + const u_char *p); + +typedef int (*codeset_pr_func_t)(const struct ie_tlv_header_t *ie_p, + const u_char *p); + +/* array of 16 codepages - currently we only support codepage 1,5 */ +static codeset_pr_func_t fr_q933_print_ie_codeset[] = { + NULL, + fr_q933_print_ie_codeset5, + NULL, + NULL, + NULL, + fr_q933_print_ie_codeset5, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL +}; + +void +q933_print(const u_char *p, u_int length) +{ + const u_char *ptemp = p; + struct ie_tlv_header_t *ie_p; + int olen; + int is_ansi = 0; + u_int codeset; + u_int ie_is_known = 0; + + if (length < 9) { /* shortest: Q.933a LINK VERIFY */ + printf("[|q.933]"); + return; + } + + codeset = p[2]&0x0f; /* extract the codeset */ + + if (p[2] == MSG_ANSI_LOCKING_SHIFT) + is_ansi = 1; + + printf("%s", eflag ? "" : "Q.933, "); + + /* printing out header part */ + printf("%s, codeset %u", is_ansi ? "ANSI" : "CCITT", codeset); + + if (p[0]) + printf(", Call Ref: 0x%02x", p[0]); + + if (vflag) + printf(", %s (0x%02x), length %u", + tok2str(fr_q933_msg_values,"unknown message",p[1]), + p[1], + length); + else + printf(", %s", + tok2str(fr_q933_msg_values,"unknown message 0x%02x",p[1])); + + olen = length; /* preserve the original length for non verbose mode */ + + if (length < (u_int)(2 - is_ansi)) { + printf("[|q.933]"); + return; + } + length -= 2 - is_ansi; + ptemp += 2 + is_ansi; + + /* Loop through the rest of IE */ + while (length > sizeof(struct ie_tlv_header_t )) { + ie_p = (struct ie_tlv_header_t *)ptemp; + if (length < sizeof(struct ie_tlv_header_t ) || + length < sizeof(struct ie_tlv_header_t ) + ie_p->ie_len) { + if (vflag) /* not bark if there is just a trailer */ + printf("\n[|q.933]"); + else + printf(", length %u",olen); + return; + } + + /* lets do the full IE parsing only in verbose mode + * however some IEs (DLCI Status, Link Verify) + * are also intereststing in non-verbose mode */ + if (vflag) + printf("\n\t%s IE (0x%02x), length %u: ", + tok2str(fr_q933_ie_codesets[codeset],"unknown",ie_p->ie_type), + ie_p->ie_type, + ie_p->ie_len); + + /* sanity check */ + if (ie_p->ie_type == 0 || ie_p->ie_len == 0) + return; + + if (fr_q933_print_ie_codeset[codeset] != NULL) + ie_is_known = fr_q933_print_ie_codeset[codeset](ie_p, ptemp); + + if (vflag >= 1 && !ie_is_known) + print_unknown_data(ptemp+2,"\n\t",ie_p->ie_len); + + /* do we want to see a hexdump of the IE ? */ + if (vflag> 1 && ie_is_known) + print_unknown_data(ptemp+2,"\n\t ",ie_p->ie_len); + + length = length - ie_p->ie_len - 2; + ptemp = ptemp + ie_p->ie_len + 2; + } + if (!vflag) + printf(", length %u",olen); +} + +static int +fr_q933_print_ie_codeset5(const struct ie_tlv_header_t *ie_p, const u_char *p) +{ + u_int dlci; + + switch (ie_p->ie_type) { + + case FR_LMI_ANSI_REPORT_TYPE_IE: /* fall through */ + case FR_LMI_CCITT_REPORT_TYPE_IE: + if (vflag) + printf("%s (%u)", + tok2str(fr_lmi_report_type_ie_values,"unknown",p[2]), + p[2]); + return 1; + + case FR_LMI_ANSI_LINK_VERIFY_IE: /* fall through */ + case FR_LMI_CCITT_LINK_VERIFY_IE: + case FR_LMI_ANSI_LINK_VERIFY_IE_91: + if (!vflag) + printf(", "); + printf("TX Seq: %3d, RX Seq: %3d", p[2], p[3]); + return 1; + + case FR_LMI_ANSI_PVC_STATUS_IE: /* fall through */ + case FR_LMI_CCITT_PVC_STATUS_IE: + if (!vflag) + printf(", "); + /* now parse the DLCI information element. */ + if ((ie_p->ie_len < 3) || + (p[2] & 0x80) || + ((ie_p->ie_len == 3) && !(p[3] & 0x80)) || + ((ie_p->ie_len == 4) && ((p[3] & 0x80) || !(p[4] & 0x80))) || + ((ie_p->ie_len == 5) && ((p[3] & 0x80) || (p[4] & 0x80) || + !(p[5] & 0x80))) || + (ie_p->ie_len > 5) || + !(p[ie_p->ie_len + 1] & 0x80)) + printf("Invalid DLCI IE"); + + dlci = ((p[2] & 0x3F) << 4) | ((p[3] & 0x78) >> 3); + if (ie_p->ie_len == 4) + dlci = (dlci << 6) | ((p[4] & 0x7E) >> 1); + else if (ie_p->ie_len == 5) + dlci = (dlci << 13) | (p[4] & 0x7F) | ((p[5] & 0x7E) >> 1); + + printf("DLCI %u: status %s%s", dlci, + p[ie_p->ie_len + 1] & 0x8 ? "New, " : "", + p[ie_p->ie_len + 1] & 0x2 ? "Active" : "Inactive"); + return 1; + } + + return 0; +} -- cgit v1.2.3