* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static const char rcsid[] _U_ =
- "@(#)$Header: /tcpdump/master/tcpdump/print-fr.c,v 1.26 2004-10-12 21:02:00 hannes Exp $ (LBL)";
-#endif
-
+#define NETDISSECT_REWORKED
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <string.h>
-#include <pcap.h>
-#include "addrtoname.h"
#include "interface.h"
+#include "addrtoname.h"
#include "ethertype.h"
#include "nlpid.h"
#include "extract.h"
+#include "oui.h"
-static void lmi_print(const u_char *, u_int);
-static void frf15_print(const u_char *, u_int);
+static void frf15_print(netdissect_options *ndo, const u_char *, u_int);
/*
* the frame relay header has a variable length
#define FR_SDLC_BIT 0x00000002
-struct tok fr_header_flag_values[] = {
+static const struct tok fr_header_flag_values[] = {
{ FR_CR_BIT, "C!" },
{ FR_DE_BIT, "DE" },
{ FR_BECN_BIT, "BECN" },
{ 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 )
+
+static const 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)
+static int parse_q922_addr(const u_char *p, u_int *dlci,
+ u_int *addr_len, uint8_t *flags)
{
if ((p[0] & FR_EA_BIT))
return -1;
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 */
flags[3] = p[0] & 0x02;
- if (p[0] & 0x02)
- *sdlcore = p[0] >> 2;
- else
- *dlci = (*dlci << 6) | (p[0] >> 2);
+ *dlci = (*dlci << 6) | (p[0] >> 2);
return 0;
}
+char *q922_string(const u_char *p) {
+
+ static u_int dlci, addr_len;
+ static uint8_t flags[4];
+ static char buffer[sizeof("DLCI xxxxxxxxxx")];
+ memset(buffer, 0, sizeof(buffer));
+
+ if (parse_q922_addr(p, &dlci, &addr_len, flags) == 0){
+ snprintf(buffer, sizeof(buffer), "DLCI %u", dlci);
+ }
+
+ return buffer;
+}
+
+
/* Frame Relay packet structure, with flags and CRC removed
+---------------------------+
*/
static u_int
-fr_hdrlen(const u_char *p, u_int addr_len, u_int caplen)
+fr_hdrlen(const u_char *p, u_int addr_len)
{
- if ((caplen > addr_len + 1 /* UI */ + 1 /* pad */) &&
- !p[addr_len + 1] /* pad exist */)
+ if (!p[addr_len + 1] /* pad exist */)
return addr_len + 1 /* UI */ + 1 /* pad */ + 1 /* NLPID */;
- else
+ 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)
+fr_hdr_print(netdissect_options *ndo,
+ int length, u_int addr_len, u_int dlci, uint8_t *flags, uint16_t nlpid)
{
- if (qflag) {
- (void)printf("Q.922, DLCI %u, length %u: ",
+ if (ndo->ndo_qflag) {
+ ND_PRINT((ndo, "Q.922, DLCI %u, length %u: ",
dlci,
- length);
+ 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: ",
+ ND_PRINT((ndo, "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);
+ length));
else /* must be an ethertype */
- (void)printf("Q.922, hdr-len %u, DLCI %u, Flags [%s], cisco-ethertype %s (0x%04x), length %u: ",
+ ND_PRINT((ndo, "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);
+ length));
}
}
u_int
-fr_if_print(const struct pcap_pkthdr *h, register const u_char *p)
+fr_if_print(netdissect_options *ndo,
+ const struct pcap_pkthdr *h, register const u_char *p)
{
register u_int length = h->len;
register u_int caplen = h->caplen;
- u_int16_t extracted_ethertype;
- u_int32_t orgcode;
- register u_short et;
+
+ ND_TCHECK2(*p, 4); /* minimum frame header length */
+
+ if ((length = fr_print(ndo, p, length)) == 0)
+ return (0);
+ else
+ return length;
+ trunc:
+ ND_PRINT((ndo, "[|fr]"));
+ return caplen;
+}
+
+u_int
+fr_print(netdissect_options *ndo,
+ register const u_char *p, u_int length)
+{
+ uint16_t extracted_ethertype;
u_int dlci;
- u_int sdlcore;
u_int addr_len;
- u_int16_t nlpid;
+ uint16_t nlpid;
u_int hdr_len;
- u_int8_t flags[4];
-
- if (caplen < 4) { /* minimum frame header length */
- printf("[|fr]");
- return caplen;
- }
+ uint8_t flags[4];
- if (parse_q922_addr(p, &dlci, &sdlcore, &addr_len, flags)) {
- printf("Q.922, invalid address");
- return caplen;
+ if (parse_q922_addr(p, &dlci, &addr_len, flags)) {
+ ND_PRINT((ndo, "Q.922, invalid address"));
+ return 0;
}
- hdr_len = fr_hdrlen(p, addr_len, caplen);
+ ND_TCHECK2(*p, addr_len+1+1);
+ hdr_len = fr_hdrlen(p, addr_len);
+ ND_TCHECK2(*p, hdr_len);
- if (caplen < hdr_len) {
- printf("[|fr]");
- return caplen;
- }
-
- if (p[addr_len] != 0x03) {
+ 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 (ndo->ndo_eflag)
+ fr_hdr_print(ndo, length, addr_len, dlci, flags, extracted_ethertype);
- if (ether_encap_print(extracted_ethertype,
+ if (ethertype_print(ndo, extracted_ethertype,
p+addr_len+ETHERTYPE_LEN,
length-addr_len-ETHERTYPE_LEN,
- caplen-addr_len-ETHERTYPE_LEN,
- &extracted_ethertype) == 0)
+ length-addr_len-ETHERTYPE_LEN) == 0)
/* ether_type not known, probably it wasn't one */
- printf("UI %02x! ", p[addr_len]);
+ ND_PRINT((ndo, "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! ");
+ ND_PRINT((ndo, "Pad! "));
} else if (addr_len == 3)
- printf("No pad! ");
+ ND_PRINT((ndo, "No pad! "));
nlpid = p[hdr_len - 1];
- if (eflag)
- fr_hdr_print(length, addr_len, dlci, flags, nlpid);
-
+ if (ndo->ndo_eflag)
+ fr_hdr_print(ndo, length, addr_len, dlci, flags, nlpid);
p += hdr_len;
length -= hdr_len;
- caplen -= hdr_len;
switch (nlpid) {
case NLPID_IP:
- ip_print(p, length);
+ ip_print(ndo, p, length);
break;
#ifdef INET6
case NLPID_IP6:
- ip6_print(p, length);
+ ip6_print(ndo, p, length);
break;
#endif
case NLPID_CLNP:
case NLPID_ESIS:
case NLPID_ISIS:
- isoclns_print(p, length, caplen);
+ isoclns_print(ndo, p - 1, length + 1, length + 1); /* OSI printers need the NLPID field */
break;
case NLPID_SNAP:
- orgcode = EXTRACT_24BITS(p);
- et = EXTRACT_16BITS(p + 3);
- if (snap_print((const u_char *)(p + 5), length - 5,
- caplen - 5, &extracted_ethertype, orgcode, et,
- 0) == 0) {
+ if (snap_print(ndo, p, length, length, 0) == 0) {
/* ether_type not known, print raw packet */
- if (!eflag)
- fr_hdr_print(length + hdr_len, hdr_len,
- dlci, flags, nlpid);
- if (extracted_ethertype) {
- printf("(SNAP %s) ",
- etherproto_string(htons(extracted_ethertype)));
- }
- if (!xflag && !qflag)
- default_print(p - hdr_len, caplen + hdr_len);
+ if (!ndo->ndo_eflag)
+ fr_hdr_print(ndo, length + hdr_len, hdr_len,
+ dlci, flags, nlpid);
+ if (!ndo->ndo_suppress_default_print)
+ ND_DEFAULTPRINT(p - hdr_len, length + hdr_len);
}
break;
- case NLPID_LMI:
- lmi_print(p, length);
+ case NLPID_Q933:
+ q933_print(ndo, p, length);
break;
case NLPID_MFR:
- frf15_print(p, length);
+ frf15_print(ndo, p, length);
+ break;
+
+ case NLPID_PPP:
+ ppp_print(ndo, p, length);
break;
default:
- if (!eflag)
- fr_hdr_print(length + hdr_len, addr_len,
+ if (!ndo->ndo_eflag)
+ fr_hdr_print(ndo, length + hdr_len, addr_len,
dlci, flags, nlpid);
- if (!xflag)
- default_print(p, caplen);
+ if (!ndo->ndo_xflag)
+ ND_DEFAULTPRINT(p, length);
}
return hdr_len;
+
+ trunc:
+ ND_PRINT((ndo, "[|fr]"));
+ return 0;
+
+}
+
+u_int
+mfr_if_print(netdissect_options *ndo,
+ const struct pcap_pkthdr *h, register const u_char *p)
+{
+ register u_int length = h->len;
+ register u_int caplen = h->caplen;
+
+ ND_TCHECK2(*p, 2); /* minimum frame header length */
+
+ if ((length = mfr_print(ndo, p, length)) == 0)
+ return (0);
+ else
+ return length;
+ trunc:
+ ND_PRINT((ndo, "[|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
+
+static const 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
+
+static const 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 {
+ uint8_t ie_type;
+ uint8_t ie_len;
+};
+
+u_int
+mfr_print(netdissect_options *ndo,
+ register const u_char *p, u_int length)
+{
+ u_int tlen,idx,hdr_len = 0;
+ uint16_t sequence_num;
+ uint8_t ie_type,ie_len;
+ const uint8_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 |
+ * +----+----+----+----+----+----+----+----+
+ */
+
+ ND_TCHECK2(*p, 4); /* minimum frame header length */
+
+ if ((p[0] & MFR_BEC_MASK) == MFR_CTRL_FRAME && p[1] == 0) {
+ ND_PRINT((ndo, "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 (!ndo->ndo_vflag)
+ return hdr_len;
+
+ while (tlen>sizeof(struct ie_tlv_header_t)) {
+ ND_TCHECK2(*tptr, sizeof(struct ie_tlv_header_t));
+ ie_type=tptr[0];
+ ie_len=tptr[1];
+
+ ND_PRINT((ndo, "\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;
+
+ ND_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:
+ ND_PRINT((ndo, "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(ndo, *(tptr + idx));
+ else
+ break;
+ }
+ break;
+
+ case MFR_CTRL_IE_TIMESTAMP:
+ if (ie_len == sizeof(struct timeval)) {
+ ts_print(ndo, (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 (ndo->ndo_vflag <= 1)
+ print_unknown_data(ndo, tptr, "\n\t ", ie_len);
+ break;
+ }
+
+ /* do we want to see a hexdump of the IE ? */
+ if (ndo->ndo_vflag > 1 )
+ print_unknown_data(ndo, 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) {
+ ND_PRINT((ndo, "FRF.16 Frag, seq %u, Flags [%s], ",
+ sequence_num,
+ bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK))));
+ hdr_len = 2;
+ fr_print(ndo, p+hdr_len,length-hdr_len);
+ return hdr_len;
+ }
+
+ /* must be a middle or the last fragment */
+ ND_PRINT((ndo, "FRF.16 Frag, seq %u, Flags [%s]",
+ sequence_num,
+ bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK))));
+ print_unknown_data(ndo, p, "\n\t", length);
+
+ return hdr_len;
+
+ trunc:
+ ND_PRINT((ndo, "[|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 ~
* +----+----+----+----+----+----+----+----+
*/
-struct tok frf15_flag_values[] = {
- { 0x80, "Begin" },
- { 0x40, "End" },
- { 0x20, "Control" },
- { 0, NULL }
-};
-
#define FR_FRF15_FRAGTYPE 0x01
static void
-frf15_print (const u_char *p, u_int length) {
-
- u_int16_t sequence_num, flags;
+frf15_print(netdissect_options *ndo,
+ const u_char *p, u_int length) {
- flags = p[0]&0xe0;
+ uint16_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",
+ ND_PRINT((ndo, "FRF.15, seq 0x%03x, Flags [%s],%s Fragmentation, length %u",
sequence_num,
- bittok2str(frf15_flag_values,"none",flags),
- flags&FR_FRF15_FRAGTYPE ? "Interface" : "End-to-End",
- length);
+ 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
*/
/* Q.933 packet format
- Format of Other Protocols
+ Format of Other Protocols
using Q.933 NLPID
- +-------------------------------+
- | Q.922 Address |
+ +-------------------------------+
+ | Q.922 Address |
+ +---------------+---------------+
+ |Control 0x03 | NLPID 0x08 |
+---------------+---------------+
- |Control 0x03 | NLPID 0x08 |
- +---------------+---------------+
| L2 Protocol ID |
| octet 1 | octet 2 |
+-------------------------------+
#define MSG_TYPE_STATUS 0x7D
#define MSG_TYPE_STATUS_ENQ 0x75
-struct tok fr_lmi_msg_values[] = {
+static const struct tok fr_q933_msg_values[] = {
{ MSG_TYPE_ESC_TO_NATIONAL, "ESC to National" },
{ MSG_TYPE_ALERT, "Alert" },
{ MSG_TYPE_CALL_PROCEEDING, "Call proceeding" },
#define FR_LMI_CCITT_LINK_VERIFY_IE 0x53
#define FR_LMI_CCITT_PVC_STATUS_IE 0x57
-struct tok fr_lmi_ie_values[] = {
+static const 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" },
#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[] = {
+static const 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 }
};
-struct common_ie_header {
- u_int8_t ie_id;
- u_int8_t ie_len;
+/* array of 16 codepages - currently we only support codepage 1,5 */
+static const 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 void
-lmi_print(const u_char *p, u_int length)
+static int fr_q933_print_ie_codeset5(netdissect_options *ndo,
+ const struct ie_tlv_header_t *ie_p, const u_char *p);
+
+typedef int (*codeset_pr_func_t)(netdissect_options *,
+ const struct ie_tlv_header_t *ie_p, const u_char *p);
+
+/* array of 16 codepages - currently we only support codepage 1,5 */
+static const 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(netdissect_options *ndo,
+ const u_char *p, u_int length)
{
const u_char *ptemp = p;
- struct common_ie_header *ie_p;
+ struct ie_tlv_header_t *ie_p;
int olen;
int is_ansi = 0;
- u_int dlci;
+ u_int codeset;
+ u_int ie_is_known = 0;
if (length < 9) { /* shortest: Q.933a LINK VERIFY */
- printf("[|lmi]");
+ ND_PRINT((ndo, "[|q.933]"));
return;
}
- if (p[2] == MSG_ANSI_LOCKING_SHIFT)
- is_ansi = 1;
-
- if (!eflag)
- printf("Q.933 LMI, ");
+ codeset = p[2]&0x0f; /* extract the codeset */
- /* printing out header part */
- printf(is_ansi ? "ANSI" : "CCITT ");
+ if (p[2] == MSG_ANSI_LOCKING_SHIFT) {
+ is_ansi = 1;
+ }
- if (p[0])
- printf(", Call Ref: 0x%02x", p[0]);
+ ND_PRINT((ndo, "%s", ndo->ndo_eflag ? "" : "Q.933, "));
- if (vflag)
- printf(", %s (0x%02x), length %u",
- tok2str(fr_lmi_msg_values,"unknown message",p[1]),
- p[1],
- length);
- else
- printf(", %s",
- tok2str(fr_lmi_msg_values,"unknown message 0x%02x",p[1]));
+ /* printing out header part */
+ ND_PRINT((ndo, "%s, codeset %u", is_ansi ? "ANSI" : "CCITT", codeset));
+
+ if (p[0]) {
+ ND_PRINT((ndo, ", Call Ref: 0x%02x", p[0]));
+ }
+ if (ndo->ndo_vflag) {
+ ND_PRINT((ndo, ", %s (0x%02x), length %u",
+ tok2str(fr_q933_msg_values,
+ "unknown message", p[1]),
+ p[1],
+ length));
+ } else {
+ ND_PRINT((ndo, ", %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("[|lmi]");
+ ND_PRINT((ndo, "[|q.933]"));
return;
}
- length -= 2 - is_ansi;
+ length -= 2 + is_ansi;
ptemp += 2 + is_ansi;
-
+
/* Loop through the rest of IE */
- while (length > 0) {
- ie_p = (struct common_ie_header *)ptemp;
- if (length < sizeof(struct common_ie_header) ||
- length < sizeof(struct common_ie_header) + ie_p->ie_len) {
- if (vflag) /* not bark if there is just a trailer */
- printf("\n[|lmi]");
- else
- printf(", length %u",olen);
+ 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 (ndo->ndo_vflag) { /* not bark if there is just a trailer */
+ ND_PRINT((ndo, "\n[|q.933]"));
+ } else {
+ ND_PRINT((ndo, ", 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 (%u), length %u: ",
- tok2str(fr_lmi_ie_values,"unknown",ie_p->ie_id),
- ie_p->ie_id,
- ie_p->ie_len);
-
- switch (ie_p->ie_id) {
-
- 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",ptemp[2]),
- ptemp[2]);
- break;
+ * are also interestting in non-verbose mode */
+ if (ndo->ndo_vflag) {
+ ND_PRINT((ndo, "\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));
+ }
- 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", ptemp[2], ptemp[3]);
- break;
- 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) ||
- (ptemp[2] & 0x80) ||
- ((ie_p->ie_len == 3) && !(ptemp[3] & 0x80)) ||
- ((ie_p->ie_len == 4) && ((ptemp[3] & 0x80) || !(ptemp[4] & 0x80))) ||
- ((ie_p->ie_len == 5) && ((ptemp[3] & 0x80) || (ptemp[4] & 0x80) ||
- !(ptemp[5] & 0x80))) ||
- (ie_p->ie_len > 5) ||
- !(ptemp[ie_p->ie_len + 1] & 0x80))
- printf("Invalid DLCI IE");
-
- dlci = ((ptemp[2] & 0x3F) << 4) | ((ptemp[3] & 0x78) >> 3);
- if (ie_p->ie_len == 4)
- dlci = (dlci << 6) | ((ptemp[4] & 0x7E) >> 1);
- else if (ie_p->ie_len == 5)
- dlci = (dlci << 13) | (ptemp[4] & 0x7F) | ((ptemp[5] & 0x7E) >> 1);
-
- printf("DLCI %u: status %s%s", dlci,
- ptemp[ie_p->ie_len + 1] & 0x8 ? "New, " : "",
- ptemp[ie_p->ie_len + 1] & 0x2 ? "Active" : "Inactive");
- break;
-
- default:
- if (vflag <= 1)
- print_unknown_data(ptemp+2,"\n\t",ie_p->ie_len);
- break;
- }
+ /* 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](ndo, ie_p, ptemp);
+ }
+
+ if (ndo->ndo_vflag >= 1 && !ie_is_known) {
+ print_unknown_data(ndo, ptemp+2, "\n\t", ie_p->ie_len);
+ }
/* do we want to see a hexdump of the IE ? */
- if (vflag> 1)
- print_unknown_data(ptemp+2,"\n\t ",ie_p->ie_len);
+ if (ndo->ndo_vflag> 1 && ie_is_known) {
+ print_unknown_data(ndo, 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);
+ if (!ndo->ndo_vflag) {
+ ND_PRINT((ndo, ", length %u", olen));
+ }
}
+
+static int
+fr_q933_print_ie_codeset5(netdissect_options *ndo,
+ 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 (ndo->ndo_vflag) {
+ ND_PRINT((ndo, "%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 (!ndo->ndo_vflag) {
+ ND_PRINT((ndo, ", "));
+ }
+ ND_PRINT((ndo, "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 (!ndo->ndo_vflag) {
+ ND_PRINT((ndo, ", "));
+ }
+ /* 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)) {
+ ND_PRINT((ndo, "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);
+ }
+
+ ND_PRINT((ndo, "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;
+}
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */
projects / tcpdump / blobdiff