* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
+/* \summary: Asynchronous Transfer Mode (ATM) printer */
+
+#include <config.h>
-#include <tcpdump-stdinc.h>
+#include "netdissect-stdinc.h"
-#include "interface.h"
+#define ND_LONGJMP_FROM_TCHECK
+#include "netdissect.h"
#include "extract.h"
#include "addrtoname.h"
#include "atm.h"
#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 CALLED_PARTY 0x70 /* called party number */
#define Q2931 0x09
#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 */
+#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 */
-static const char tstr[] = "[|atm]";
#define OAM_CRC10_MASK 0x3ff
#define OAM_PAYLOAD_LEN 48
{ 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
+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. */
};
/*
* 'h->len' is the length of the packet off the wire, and 'h->caplen'
* is the number of bytes actually captured.
*/
-u_int
+void
atm_if_print(netdissect_options *ndo,
const struct pcap_pkthdr *h, const u_char *p)
{
uint32_t llchdr;
u_int hdrlen = 0;
- if (caplen < 1 || length < 1) {
- ND_PRINT((ndo, "%s", tstr));
- return (caplen);
- }
+ ndo->ndo_protocol = "atm";
/* Cisco Style NLPID ? */
- if (*p == LLC_UI) {
+ if (GET_U_1(p) == LLC_UI) {
if (ndo->ndo_eflag)
- ND_PRINT((ndo, "CNLPID "));
- isoclns_print(ndo, p + 1, length - 1, caplen - 1);
- return hdrlen;
+ 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.
*/
- if (caplen < 3 || length < 3) {
- ND_PRINT((ndo, "%s", tstr));
- return (caplen);
- }
/*
* Extract the presumed LLC header into a variable, for quick
* packet nor an RFC 2684 routed NLPID-formatted PDU nor
* an 802.2-but-no-SNAP IP packet.
*/
- llchdr = EXTRACT_24BITS(p);
+ 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)) {
* 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 (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)));
+ 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;
}
- hdrlen += atm_llc_print(ndo, p, length, caplen);
- return (hdrlen);
+ ndo->ndo_ll_hdr_len += hdrlen;
+ ndo->ndo_ll_hdr_len += atm_llc_print(ndo, p, length, caplen);
}
/*
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;
- }
- if (p[PROTO_POS] == Q2931) {
+ if (GET_U_1(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])));
+ 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,
* 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));
+ call_ref = GET_BE_U_3(p + CALL_REF_POS);
+ ND_PRINT("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("SSCOP, proto %u ", GET_U_1(p + PROTO_POS));
}
}
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((ndo, "VPI:%u VCI:%u ", vpi, vci));
+ ND_PRINT("VPI:%u VCI:%u ", vpi, vci);
if (vpi == 0) {
switch (vci) {
case VCI_PPC:
- sig_print(ndo, p, caplen);
+ sig_print(ndo, p);
return;
case VCI_BCC:
- ND_PRINT((ndo, "broadcast sig: "));
+ ND_PRINT("broadcast sig: ");
return;
case VCI_OAMF4SC: /* fall through */
return;
case VCI_METAC:
- ND_PRINT((ndo, "meta: "));
+ ND_PRINT("meta: ");
return;
case VCI_ILMIC:
- ND_PRINT((ndo, "ilmi: "));
+ ND_PRINT("ilmi: ");
snmp_print(ndo, p, length);
return;
}
}
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];
+ 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 {
- uint8_t failure_type;
- uint8_t failure_location[16];
- uint8_t unused[28];
+ nd_uint8_t failure_type;
+ nd_byte failure_location[16];
+ nd_byte unused[28];
};
-int
-oam_print (netdissect_options *ndo,
- const u_char *p, u_int length, u_int hec)
+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;
-
- 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;
+ 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((ndo, "%s, vpi %u, vci %u, payload [ %s ], clp %u, length %u",
+ 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));
+ clp, length);
if (!ndo->ndo_vflag) {
- return 1;
+ return;
}
- ND_PRINT((ndo, "\n\tcell-type %s (%u)",
+ ND_PRINT("\n\tcell-type %s (%u)",
tok2str(oam_celltype_values, "unknown", cell_type),
- cell_type));
+ cell_type);
- if (oam_functype_values[cell_type] == NULL)
- ND_PRINT((ndo, ", func-type unknown (%u)", func_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((ndo, ", func-type %s (%u)",
- tok2str(oam_functype_values[cell_type],"none",func_type),
- func_type));
+ 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_PRINT((ndo, "\n\tLoopback-Indicator %s, Correlation-Tag 0x%08x",
+ 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",
- 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 "));
+ 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((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_loopback->loopback_id[idx])));
+ ND_PRINT("%04x ",
+ GET_BE_U_2(&oam_ptr.oam_fm_loopback->loopback_id[idx]));
}
}
- ND_PRINT((ndo, "\n\tSource-ID "));
+ ND_PRINT("\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("%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_PRINT((ndo, "\n\tFailure-type 0x%02x", oam_ptr.oam_fm_ais_rdi->failure_type));
- ND_PRINT((ndo, "\n\tLocation-ID "));
+ 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((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_ais_rdi->failure_location[idx])));
+ ND_PRINT("%04x ",
+ GET_BE_U_2(&oam_ptr.oam_fm_ais_rdi->failure_location[idx]));
}
}
break;
}
/* crc10 checksum verification */
- cksum = EXTRACT_16BITS(p + OAM_CELLTYPE_FUNCTYPE_LEN + OAM_FUNCTION_SPECIFIC_LEN)
+ 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((ndo, "\n\tcksum 0x%03x (%scorrect)",
+ ND_PRINT("\n\tcksum 0x%03x (%scorrect)",
cksum,
- cksum_shouldbe == 0 ? "" : "in"));
-
- return 1;
+ cksum_shouldbe == 0 ? "" : "in");
}
projects / tcpdump / blobdiff