* LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE.
*
- * support for the IEEE MPCP protocol as per 802.3ah
- *
*/
-#ifndef lint
-static const char rcsid[] _U_ =
- "@(#) $Header: /tcpdump/master/tcpdump/print-mpcp.c,v 1.2 2006-02-10 17:24:55 hannes Exp $";
-#endif
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
+/* \summary: IEEE 802.3ah Multi-Point Control Protocol (MPCP) printer */
-#include <tcpdump-stdinc.h>
+#include <config.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
+#include "netdissect-stdinc.h"
-#include "interface.h"
+#include "netdissect.h"
#include "extract.h"
-#include "addrtoname.h"
-#include "ether.h"
-
-#define MPCP_TIMESTAMP_LEN 4
-#define MPCP_TIMESTAMP_DURATION_LEN 2
struct mpcp_common_header_t {
- u_int8_t opcode[2];
- u_int8_t timestamp[MPCP_TIMESTAMP_LEN];
+ nd_uint16_t opcode;
+ nd_uint32_t timestamp;
};
#define MPCP_OPCODE_PAUSE 0x0001
};
#define MPCP_GRANT_NUMBER_LEN 1
-#define MPCP_GRANT_NUMBER_MASK 0x7
+#define MPCP_GRANT_NUMBER_MASK 0x7
static const struct tok mpcp_grant_flag_values[] = {
{ 0x08, "Discovery" },
{ 0x10, "Force Grant #1" },
};
struct mpcp_grant_t {
- u_int8_t starttime[MPCP_TIMESTAMP_LEN];
- u_int8_t duration[MPCP_TIMESTAMP_DURATION_LEN];
+ nd_uint32_t starttime;
+ nd_uint16_t duration;
};
struct mpcp_reg_req_t {
- u_int8_t flags;
- u_int8_t pending_grants;
+ nd_uint8_t flags;
+ nd_uint8_t pending_grants;
};
};
struct mpcp_reg_t {
- u_int8_t assigned_port[2];
- u_int8_t flags;
- u_int8_t sync_time[MPCP_TIMESTAMP_DURATION_LEN];
- u_int8_t echoed_pending_grants;
+ nd_uint16_t assigned_port;
+ nd_uint8_t flags;
+ nd_uint16_t sync_time;
+ nd_uint8_t echoed_pending_grants;
};
static const struct tok mpcp_reg_flag_values[] = {
};
struct mpcp_reg_ack_t {
- u_int8_t flags;
- u_int8_t echoed_assigned_port[2];
- u_int8_t echoed_sync_time[MPCP_TIMESTAMP_DURATION_LEN];
+ nd_uint8_t flags;
+ nd_uint16_t echoed_assigned_port;
+ nd_uint16_t echoed_sync_time;
};
static const struct tok mpcp_reg_ack_flag_values[] = {
};
void
-mpcp_print(register const u_char *pptr, register u_int length) {
-
- union {
- const struct mpcp_common_header_t *common_header;
- const struct mpcp_grant_t *grant;
- const struct mpcp_reg_req_t *reg_req;
- const struct mpcp_reg_t *reg;
- const struct mpcp_reg_ack_t *reg_ack;
- } mpcp;
+mpcp_print(netdissect_options *ndo, const u_char *pptr, u_int length)
+{
+ const struct mpcp_common_header_t *mpcp_common_header;
+ const struct mpcp_reg_req_t *mpcp_reg_req;
+ const struct mpcp_reg_t *mpcp_reg;
+ const struct mpcp_reg_ack_t *mpcp_reg_ack;
const u_char *tptr;
- u_int16_t opcode;
- u_int8_t grant_numbers, grant;
- u_int8_t queue_sets, queue_set, report_bitmap, report;
+ uint16_t opcode;
+ uint32_t timestamp;
+ uint8_t grant_numbers, grant;
+ uint8_t queue_sets, queue_set, report_bitmap, report;
+ ndo->ndo_protocol = "mpcp";
tptr=pptr;
- mpcp.common_header = (const struct mpcp_common_header_t *)pptr;
+ mpcp_common_header = (const struct mpcp_common_header_t *)pptr;
- if (!TTEST2(*tptr, sizeof(const struct mpcp_common_header_t)))
- goto trunc;
- opcode = EXTRACT_16BITS(mpcp.common_header->opcode);
- printf("MPCP, Opcode %s", tok2str(mpcp_opcode_values, "Unknown (%u)", opcode));
+ opcode = GET_BE_U_2(mpcp_common_header->opcode);
+ timestamp = GET_BE_U_4(mpcp_common_header->timestamp);
+ ND_PRINT("MPCP, Opcode %s", tok2str(mpcp_opcode_values, "Unknown (%u)", opcode));
if (opcode != MPCP_OPCODE_PAUSE) {
- printf(", Timestamp %u ticks", EXTRACT_32BITS(mpcp.common_header->timestamp));
+ ND_PRINT(", Timestamp %u ticks", timestamp);
}
- printf(", length %u", length);
+ ND_PRINT(", length %u", length);
- if (!vflag)
+ if (!ndo->ndo_vflag)
return;
- tptr += sizeof(const struct mpcp_common_header_t);
+ tptr += sizeof(struct mpcp_common_header_t);
switch (opcode) {
case MPCP_OPCODE_PAUSE:
break;
case MPCP_OPCODE_GATE:
- if (!TTEST2(*tptr, MPCP_GRANT_NUMBER_LEN))
- goto trunc;
- grant_numbers = *tptr & MPCP_GRANT_NUMBER_MASK;
- printf("\n\tGrant Numbers %u, Flags [ %s ]",
+ grant_numbers = GET_U_1(tptr) & MPCP_GRANT_NUMBER_MASK;
+ ND_PRINT("\n\tGrant Numbers %u, Flags [ %s ]",
grant_numbers,
bittok2str(mpcp_grant_flag_values,
"?",
- *tptr &~ MPCP_GRANT_NUMBER_MASK));
+ GET_U_1(tptr) & ~MPCP_GRANT_NUMBER_MASK));
tptr++;
for (grant = 1; grant <= grant_numbers; grant++) {
- if (!TTEST2(*tptr, sizeof(const struct mpcp_grant_t)))
- goto trunc;
- mpcp.grant = (const struct mpcp_grant_t *)tptr;
- printf("\n\tGrant #%u, Start-Time %u ticks, duration %u ticks",
+ const struct mpcp_grant_t *mpcp_grant = (const struct mpcp_grant_t *)tptr;
+ ND_PRINT("\n\tGrant #%u, Start-Time %u ticks, duration %u ticks",
grant,
- EXTRACT_32BITS(mpcp.grant->starttime),
- EXTRACT_16BITS(mpcp.grant->duration));
- tptr += sizeof(const struct mpcp_grant_t);
+ GET_BE_U_4(mpcp_grant->starttime),
+ GET_BE_U_2(mpcp_grant->duration));
+ tptr += sizeof(struct mpcp_grant_t);
}
- if (!TTEST2(*tptr, MPCP_TIMESTAMP_DURATION_LEN))
- goto trunc;
- printf("\n\tSync-Time %u ticks", EXTRACT_16BITS(tptr));
+ ND_PRINT("\n\tSync-Time %u ticks", GET_BE_U_2(tptr));
break;
case MPCP_OPCODE_REPORT:
- if (!TTEST2(*tptr, MPCP_REPORT_QUEUESETS_LEN))
- goto trunc;
- queue_sets = *tptr;
+ queue_sets = GET_U_1(tptr);
tptr+=MPCP_REPORT_QUEUESETS_LEN;
- printf("\n\tTotal Queue-Sets %u", queue_sets);
+ ND_PRINT("\n\tTotal Queue-Sets %u", queue_sets);
for (queue_set = 1; queue_set < queue_sets; queue_set++) {
- if (!TTEST2(*tptr, MPCP_REPORT_REPORTBITMAP_LEN))
- goto trunc;
- report_bitmap = *(tptr);
- printf("\n\t Queue-Set #%u, Report-Bitmap [ %s ]",
+ report_bitmap = GET_U_1(tptr);
+ ND_PRINT("\n\t Queue-Set #%u, Report-Bitmap [ %s ]",
queue_sets,
bittok2str(mpcp_report_bitmap_values, "Unknown", report_bitmap));
tptr++;
report=1;
- while (report_bitmap != 0) {
+ while (report_bitmap != 0) {
if (report_bitmap & 1) {
- if (!TTEST2(*tptr, MPCP_TIMESTAMP_DURATION_LEN))
- goto trunc;
- printf("\n\t Q%u Report, Duration %u ticks",
+ ND_PRINT("\n\t Q%u Report, Duration %u ticks",
report,
- EXTRACT_16BITS(tptr));
- tptr+=MPCP_TIMESTAMP_DURATION_LEN;
+ GET_BE_U_2(tptr));
+ tptr += 2;
}
report++;
report_bitmap = report_bitmap >> 1;
break;
case MPCP_OPCODE_REG_REQ:
- if (!TTEST2(*tptr, sizeof(const struct mpcp_reg_req_t)))
- goto trunc;
- mpcp.reg_req = (const struct mpcp_reg_req_t *)tptr;
- printf("\n\tFlags [ %s ], Pending-Grants %u",
- bittok2str(mpcp_reg_req_flag_values, "Reserved", mpcp.reg_req->flags),
- mpcp.reg_req->pending_grants);
+ mpcp_reg_req = (const struct mpcp_reg_req_t *)tptr;
+ ND_PRINT("\n\tFlags [ %s ], Pending-Grants %u",
+ bittok2str(mpcp_reg_req_flag_values, "Reserved", GET_U_1(mpcp_reg_req->flags)),
+ GET_U_1(mpcp_reg_req->pending_grants));
break;
case MPCP_OPCODE_REG:
- if (!TTEST2(*tptr, sizeof(const struct mpcp_reg_t)))
- goto trunc;
- mpcp.reg = (const struct mpcp_reg_t *)tptr;
- printf("\n\tAssigned-Port %u, Flags [ %s ]" \
+ mpcp_reg = (const struct mpcp_reg_t *)tptr;
+ ND_PRINT("\n\tAssigned-Port %u, Flags [ %s ]"
"\n\tSync-Time %u ticks, Echoed-Pending-Grants %u",
- EXTRACT_16BITS(mpcp.reg->assigned_port),
- bittok2str(mpcp_reg_flag_values, "Reserved", mpcp.reg->flags),
- EXTRACT_16BITS(mpcp.reg->sync_time),
- mpcp.reg->echoed_pending_grants);
+ GET_BE_U_2(mpcp_reg->assigned_port),
+ bittok2str(mpcp_reg_flag_values, "Reserved", GET_U_1(mpcp_reg->flags)),
+ GET_BE_U_2(mpcp_reg->sync_time),
+ GET_U_1(mpcp_reg->echoed_pending_grants));
break;
case MPCP_OPCODE_REG_ACK:
- if (!TTEST2(*tptr, sizeof(const struct mpcp_reg_ack_t)))
- goto trunc;
- mpcp.reg_ack = (const struct mpcp_reg_ack_t *)tptr;
- printf("\n\tEchoed-Assigned-Port %u, Flags [ %s ]" \
+ mpcp_reg_ack = (const struct mpcp_reg_ack_t *)tptr;
+ ND_PRINT("\n\tEchoed-Assigned-Port %u, Flags [ %s ]"
"\n\tEchoed-Sync-Time %u ticks",
- EXTRACT_16BITS(mpcp.reg_ack->echoed_assigned_port),
- bittok2str(mpcp_reg_ack_flag_values, "Reserved", mpcp.reg_ack->flags),
- EXTRACT_16BITS(mpcp.reg_ack->echoed_sync_time));
+ GET_BE_U_2(mpcp_reg_ack->echoed_assigned_port),
+ bittok2str(mpcp_reg_ack_flag_values, "Reserved", GET_U_1(mpcp_reg_ack->flags)),
+ GET_BE_U_2(mpcp_reg_ack->echoed_sync_time));
break;
default:
/* unknown opcode - hexdump for now */
- print_unknown_data(pptr, "\n\t", length);
+ print_unknown_data(ndo,pptr, "\n\t", length);
break;
}
-
- return;
-
-trunc:
- printf("\n\t[|MPCP]");
}
projects / tcpdump / blobdiff