print-rx.c

Windump3.6.2源代码

/*
 * This code unmangles RX packets.  RX is the mutant form of RPC that AFS
 * uses to communicate between clients and servers.
 *
 * In this code, I mainly concern myself with decoding the AFS calls, not
 * with the guts of RX, per se.
 *
 * Bah.  If I never look at rx_packet.h again, it will be too soon.
 *
 * Ken Hornstein <[e-mail]>
 *
 */

#ifndef lint
static const char rcsid[] =
    "@(#) $Header: /tcpdump/master/tcpdump/print-rx.c,v 1.20 2001/01/10 08:12:01 fenner Exp $";
#endif

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifndef WIN32
#include <time.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#else
#include <winsock2.h>
#include "bittypes.h"
#endif /* WIN32 */

#include "interface.h"
#include "addrtoname.h"
#include "extract.h"

#undef NOERROR					/* Solaris sucks */
#include <arpa/nameser.h>

#include "rx.h"

#include "ip.h"

static struct tok rx_types[] = {
	{ RX_PACKET_TYPE_DATA,		"data" },
	{ RX_PACKET_TYPE_ACK,		"ack" },
	{ RX_PACKET_TYPE_BUSY,		"busy" },
	{ RX_PACKET_TYPE_ABORT,		"abort" },
	{ RX_PACKET_TYPE_ACKALL,	"ackall" },
	{ RX_PACKET_TYPE_CHALLENGE,	"challenge" },
	{ RX_PACKET_TYPE_RESPONSE,	"response" },
	{ RX_PACKET_TYPE_DEBUG,		"debug" },
	{ RX_PACKET_TYPE_PARAMS,	"params" },
	{ RX_PACKET_TYPE_VERSION,	"version" },
	{ 0,				NULL },
};

static struct tok rx_flags[] = {
	{ RX_CLIENT_INITIATED,	"client-init" },
	{ RX_REQUEST_ACK,	"req-ack" },
	{ RX_LAST_PACKET,	"last-pckt" },
	{ RX_MORE_PACKETS,	"more-pckts" },
	{ RX_FREE_PACKET,	"free-pckt" }
};

static struct tok fs_req[] = {
	{ 130,		"fetch-data" },
	{ 131,		"fetch-acl" },
	{ 132,		"fetch-status" },
	{ 133,		"store-data" },
	{ 134,		"store-acl" },
	{ 135,		"store-status" },
	{ 136,		"remove-file" },
	{ 137,		"create-file" },
	{ 138,		"rename" },
	{ 139,		"symlink" },
	{ 140,		"link" },
	{ 141,		"makedir" },
	{ 142,		"rmdir" },
	{ 143,		"oldsetlock" },
	{ 144,		"oldextlock" },
	{ 145,		"oldrellock" },
	{ 146,		"get-stats" },
	{ 147,		"give-cbs" },
	{ 148,		"get-vlinfo" },
	{ 149,		"get-vlstats" },
	{ 150,		"set-vlstats" },
	{ 151,		"get-rootvl" },
	{ 152,		"check-token" },
	{ 153,		"get-time" },
	{ 154,		"nget-vlinfo" },
	{ 155,		"bulk-stat" },
	{ 156,		"setlock" },
	{ 157,		"extlock" },
	{ 158,		"rellock" },
	{ 159,		"xstat-ver" },
	{ 160,		"get-xstat" },
	{ 161,		"dfs-lookup" },
	{ 162,		"dfs-flushcps" },
	{ 163,		"dfs-symlink" },
	{ 0,		NULL },
};

static struct tok cb_req[] = {
	{ 204,		"callback" },
	{ 205,		"initcb" },
	{ 206,		"probe" },
	{ 207,		"getlock" },
	{ 208,		"getce" },
	{ 209,		"xstatver" },
	{ 210,		"getxstat" },
	{ 211,		"initcb2" },
	{ 212,		"whoareyou" },
	{ 213,		"initcb3" },
	{ 214,		"probeuuid" },
	{ 0,		NULL },
};

static struct tok pt_req[] = {
	{ 500,		"new-user" },
	{ 501,		"where-is-it" },
	{ 502,		"dump-entry" },
	{ 503,		"add-to-group" },
	{ 504,		"name-to-id" },
	{ 505,		"id-to-name" },
	{ 506,		"delete" },
	{ 507,		"remove-from-group" },
	{ 508,		"get-cps" },
	{ 509,		"new-entry" },
	{ 510,		"list-max" },
	{ 511,		"set-max" },
	{ 512,		"list-entry" },
	{ 513,		"change-entry" },
	{ 514,		"list-elements" },
	{ 515,		"same-mbr-of" },
	{ 516,		"set-fld-sentry" },
	{ 517,		"list-owned" },
	{ 518,		"get-cps2" },
	{ 519,		"get-host-cps" },
	{ 520,		"update-entry" },
	{ 0,		NULL },
};

static struct tok vldb_req[] = {
	{ 501,		"create-entry" },
	{ 502,		"delete-entry" },
	{ 503,		"get-entry-by-id" },
	{ 504,		"get-entry-by-name" },
	{ 505,		"get-new-volume-id" },
	{ 506,		"replace-entry" },
	{ 507,		"update-entry" },
	{ 508,		"setlock" },
	{ 509,		"releaselock" },
	{ 510,		"list-entry" },
	{ 511,		"list-attrib" },
	{ 512,		"linked-list" },
	{ 513,		"get-stats" },
	{ 514,		"probe" },
	{ 515,		"get-addrs" },
	{ 516,		"change-addr" },
	{ 517,		"create-entry-n" },
	{ 518,		"get-entry-by-id-n" },
	{ 519,		"get-entry-by-name-n" },
	{ 520,		"replace-entry-n" },
	{ 521,		"list-entry-n" },
	{ 522,		"list-attrib-n" },
	{ 523,		"linked-list-n" },
	{ 524,		"update-entry-by-name" },
	{ 525,		"create-entry-u" },
	{ 526,		"get-entry-by-id-u" },
	{ 527,		"get-entry-by-name-u" },
	{ 528,		"replace-entry-u" },
	{ 529,		"list-entry-u" },
	{ 530,		"list-attrib-u" },
	{ 531,		"linked-list-u" },
	{ 532,		"regaddr" },
	{ 533,		"get-addrs-u" },
	{ 0,		NULL },
};

static struct tok kauth_req[] = {
	{ 1,		"auth-old" },
	{ 21,		"authenticate" },
	{ 22,		"authenticate-v2" },
	{ 2,		"change-pw" },
	{ 3,		"get-ticket-old" },
	{ 23,		"get-ticket" },
	{ 4,		"set-pw" },
	{ 5,		"set-fields" },
	{ 6,		"create-user" },
	{ 7,		"delete-user" },
	{ 8,		"get-entry" },
	{ 9,		"list-entry" },
	{ 10,		"get-stats" },
	{ 11,		"debug" },
	{ 12,		"get-pw" },
	{ 13,		"get-random-key" },
	{ 14,		"unlock" },
	{ 15,		"lock-status" },
	{ 0,		NULL },
};

static struct tok vol_req[] = {
	{ 100,		"create-volume" },
	{ 101,		"delete-volume" },
	{ 102,		"restore" },
	{ 103,		"forward" },
	{ 104,		"end-trans" },
	{ 105,		"clone" },
	{ 106,		"set-flags" },
	{ 107,		"get-flags" },
	{ 108,		"trans-create" },
	{ 109,		"dump" },
	{ 110,		"get-nth-volume" },
	{ 111,		"set-forwarding" },
	{ 112,		"get-name" },
	{ 113,		"get-status" },
	{ 114,		"sig-restore" },
	{ 115,		"list-partitions" },
	{ 116,		"list-volumes" },
	{ 117,		"set-id-types" },
	{ 118,		"monitor" },
	{ 119,		"partition-info" },
	{ 120,		"reclone" },
	{ 121,		"list-one-volume" },
	{ 122,		"nuke" },
	{ 123,		"set-date" },
	{ 124,		"x-list-volumes" },
	{ 125,		"x-list-one-volume" },
	{ 126,		"set-info" },
	{ 127,		"x-list-partitions" },
	{ 128,		"forward-multiple" },
	{ 0,		NULL },
};

static struct tok bos_req[] = {
	{ 80,		"create-bnode" },
	{ 81,		"delete-bnode" },
	{ 82,		"set-status" },
	{ 83,		"get-status" },
	{ 84,		"enumerate-instance" },
	{ 85,		"get-instance-info" },
	{ 86,		"get-instance-parm" },
	{ 87,		"add-superuser" },
	{ 88,		"delete-superuser" },
	{ 89,		"list-superusers" },
	{ 90,		"list-keys" },
	{ 91,		"add-key" },
	{ 92,		"delete-key" },
	{ 93,		"set-cell-name" },
	{ 94,		"get-cell-name" },
	{ 95,		"get-cell-host" },
	{ 96,		"add-cell-host" },
	{ 97,		"delete-cell-host" },
	{ 98,		"set-t-status" },
	{ 99,		"shutdown-all" },
	{ 100,		"restart-all" },
	{ 101,		"startup-all" },
	{ 102,		"set-noauth-flag" },
	{ 103,		"re-bozo" },
	{ 104,		"restart" },
	{ 105,		"start-bozo-install" },
	{ 106,		"uninstall" },
	{ 107,		"get-dates" },
	{ 108,		"exec" },
	{ 109,		"prune" },
	{ 110,		"set-restart-time" },
	{ 111,		"get-restart-time" },
	{ 112,		"start-bozo-log" },
	{ 113,		"wait-all" },
	{ 114,		"get-instance-strings" },
	{ 0,		NULL },
};

static struct tok ubik_req[] = {
	{ 10000,	"vote-beacon" },
	{ 10001,	"vote-debug-old" },
	{ 10002,	"vote-sdebug-old" },
	{ 10003,	"vote-getsyncsite" },
	{ 10004,	"vote-debug" },
	{ 10005,	"vote-sdebug" },
	{ 20000,	"disk-begin" },
	{ 20001,	"disk-commit" },
	{ 20002,	"disk-lock" },
	{ 20003,	"disk-write" },
	{ 20004,	"disk-getversion" },
	{ 20005,	"disk-getfile" },
	{ 20006,	"disk-sendfile" },
	{ 20007,	"disk-abort" },
	{ 20008,	"disk-releaselocks" },
	{ 20009,	"disk-truncate" },
	{ 20010,	"disk-probe" },
	{ 20011,	"disk-writev" },
	{ 20012,	"disk-interfaceaddr" },
	{ 20013,	"disk-setversion" },
	{ 0,		NULL },
};

#define VOTE_LOW	10000
#define VOTE_HIGH	10005
#define DISK_LOW	20000
#define DISK_HIGH	20013

static struct tok cb_types[] = {
	{ 1,		"exclusive" },
	{ 2,		"shared" },
	{ 3,		"dropped" },
	{ 0,		NULL },
};

static struct tok ubik_lock_types[] = {
	{ 1,		"read" },
	{ 2,		"write" },
	{ 3,		"wait" },
	{ 0,		NULL },
};

static char *voltype[] = { "read-write", "read-only", "backup" };

static struct tok afs_fs_errors[] = {
	{ 101,		"salvage volume" },
	{ 102, 		"no such vnode" },
	{ 103, 		"no such volume" },
	{ 104, 		"volume exist" },
	{ 105, 		"no service" },
	{ 106, 		"volume offline" },
	{ 107, 		"voline online" },
	{ 108, 		"diskfull" },
	{ 109, 		"diskquota exceeded" },
	{ 110, 		"volume busy" },
	{ 111, 		"volume moved" },
	{ 112, 		"AFS IO error" },
	{ -100,		"restarting fileserver" },
	{ 0,		NULL }
};

/*
 * Reasons for acknowledging a packet
 */

static struct tok rx_ack_reasons[] = {
	{ 1,		"ack requested" },
	{ 2,		"duplicate packet" },
	{ 3,		"out of sequence" },
	{ 4,		"exceeds window" },
	{ 5,		"no buffer space" },
	{ 6,		"ping" },
	{ 7,		"ping response" },
	{ 8,		"delay" },
	{ 0,		NULL },
};

/*
 * Cache entries we keep around so we can figure out the RX opcode
 * numbers for replies.  This allows us to make sense of RX reply packets.
 */

struct rx_cache_entry {
	u_int32_t	callnum;	/* Call number (net order) */
	struct in_addr	client;		/* client IP address (net order) */
	struct in_addr	server;		/* server IP address (net order) */
	int		dport;		/* server port (host order) */
	u_short		serviceId;	/* Service identifier (net order) */
	u_int32_t	opcode;		/* RX opcode (host order) */
};

#define RX_CACHE_SIZE	64

static struct rx_cache_entry	rx_cache[RX_CACHE_SIZE];

static int	rx_cache_next = 0;
static int	rx_cache_hint = 0;
static void	rx_cache_insert(const u_char *, const struct ip *, int, int);
static int	rx_cache_find(const struct rx_header *, const struct ip *,
			      int, int32_t *);

static void ack_print(const u_char *, int);
static void fs_print(const u_char *, int);
static void fs_reply_print(const u_char *, int, int32_t);
static void acl_print(u_char *, int, u_char *);
static void cb_print(const u_char *, int);
static void cb_reply_print(const u_char *, int, int32_t);
static void prot_print(const u_char *, int);
static void prot_reply_print(const u_char *, int, int32_t);
static void vldb_print(const u_char *, int);
static void vldb_reply_print(const u_char *, int, int32_t);
static void kauth_print(const u_char *, int);
static void kauth_reply_print(const u_char *, int, int32_t);
static void vol_print(const u_char *, int);
static void vol_reply_print(const u_char *, int, int32_t);
static void bos_print(const u_char *, int);
static void bos_reply_print(const u_char *, int, int32_t);
static void ubik_print(const u_char *, int);
static void ubik_reply_print(const u_char *, int, int32_t);

static void rx_ack_print(const u_char *, int);

static int is_ubik(u_int32_t);

/*
 * Handle the rx-level packet.  See if we know what port it's going to so
 * we can peek at the afs call inside
 */

void
rx_print(register const u_char *bp, int length, int sport, int dport,
	 u_char *bp2)
{
	register struct rx_header *rxh;
	int i;
	int32_t opcode;

	if (snapend - bp < sizeof (struct rx_header)) {
		printf(" [|rx] (%d)", length);
		return;
	}

	rxh = (struct rx_header *) bp;

	printf(" rx %s", tok2str(rx_types, "type %d", rxh->type));

	if (vflag) {
		int firstflag = 0;

		if (vflag > 1)
			printf(" cid %08x call# %d",
			       (int) EXTRACT_32BITS(&rxh->cid),
			       (int) EXTRACT_32BITS(&rxh->callNumber));

		printf(" seq %d ser %d",
		       (int) EXTRACT_32BITS(&rxh->seq),
		       (int) EXTRACT_32BITS(&rxh->serial));

		if (vflag > 2)
			printf(" secindex %d serviceid %hu",
				(int) rxh->securityIndex,
				EXTRACT_16BITS(&rxh->serviceId));

		if (vflag > 1)
			for (i = 0; i < NUM_RX_FLAGS; i++) {
				if (rxh->flags & rx_flags[i].v) {
					if (!firstflag) {
						firstflag = 1;
						printf(" ");
					} else {
						printf(",");
					}
					printf("<%s>", rx_flags[i].s);
				}
			}
	}

	/*
	 * Try to handle AFS calls that we know about.  Check the destination
	 * port and make sure it's a data packet.  Also, make sure the
	 * seq number is 1 (because otherwise it's a continuation packet,
	 * and we can't interpret that).  Also, seems that reply packets
	 * do not have the client-init flag set, so we check for that
	 * as well.
	 */

 	if (rxh->type == RX_PACKET_TYPE_ACK)
 	    ack_print(bp, length);
	else if (rxh->type == RX_PACKET_TYPE_DATA &&
	    EXTRACT_32BITS(&rxh->seq) == 1 &&
	    rxh->flags & RX_CLIENT_INITIATED) {

		/*
		 * Insert this call into the call cache table, so we
		 * have a chance to print out replies
		 */

		rx_cache_insert(bp, (const struct ip *) bp2, dport, length);

		switch (dport) {
			case FS_RX_PORT:	/* AFS file service */
				fs_print(bp, length);
				break;
			case CB_RX_PORT:	/* AFS callback service */
				cb_print(bp, length);
				break;
			case PROT_RX_PORT:	/* AFS protection service */
				prot_print(bp, length);
				break;
			case VLDB_RX_PORT:	/* AFS VLDB service */
				vldb_print(bp, length);
				break;
			case KAUTH_RX_PORT:	/* AFS Kerberos auth service */
				kauth_print(bp, length);
				break;
			case VOL_RX_PORT:	/* AFS Volume service */
				vol_print(bp, length);
				break;
			case BOS_RX_PORT:	/* AFS BOS service */
				bos_print(bp, length);
				break;
			default:
				;
		}
	
	/*
	 * If it's a reply (client-init is _not_ set, but seq is one)
	 * then look it up in the cache.  If we find it, call the reply
	 * printing functions  Note that we handle abort packets here,
	 * because printing out the return code can be useful at times.
	 */

	} else if (((rxh->type == RX_PACKET_TYPE_DATA &&
					EXTRACT_32BITS(&rxh->seq) == 1) ||
		    rxh->type == RX_PACKET_TYPE_ABORT) &&
		   (rxh->flags & RX_CLIENT_INITIATED) == 0 &&
		   rx_cache_find(rxh, (const struct ip *) bp2,
				 sport, &opcode)) {

		switch (sport) {
			case FS_RX_PORT:	/* AFS file service */
				fs_reply_print(bp, length, opcode);
				break;
			case CB_RX_PORT:	/* AFS callback service */
				cb_reply_print(bp, length, opcode);
				break;
			case PROT_RX_PORT:	/* AFS PT service */
				prot_reply_print(bp, length, opcode);
				break;
			case VLDB_RX_PORT:	/* AFS VLDB service */
				vldb_reply_print(bp, length, opcode);
				break;
			case KAUTH_RX_PORT:	/* AFS Kerberos auth service */
				kauth_reply_print(bp, length, opcode);
				break;
			case VOL_RX_PORT:	/* AFS Volume service */
				vol_reply_print(bp, length, opcode);
				break;
			case BOS_RX_PORT:	/* AFS BOS service */
				bos_reply_print(bp, length, opcode);
				break;
			default:
				;
		}

	/*
	 * If it's an RX ack packet, then use the appropriate ack decoding
	 * function (there isn't any service-specific information in the
	 * ack packet, so we can use one for all AFS services)
	 */

	} else if (rxh->type == RX_PACKET_TYPE_ACK)
		rx_ack_print(bp, length);


	printf(" (%d)", length);
}

/*
 * Insert an entry into the cache.  Taken from print-nfs.c
 */

static void
rx_cache_insert(const u_char *bp, const struct ip *ip, int dport,
		int length)
{
	struct rx_cache_entry *rxent;
	const struct rx_header *rxh = (const struct rx_header *) bp;

	if (snapend - bp + 1 <= sizeof(struct rx_header) + sizeof(int32_t))
		return;

	rxent = &rx_cache[rx_cache_next];

	if (++rx_cache_next >= RX_CACHE_SIZE)
		rx_cache_next = 0;
	
	rxent->callnum = rxh->callNumber;
	rxent->client = ip->ip_src;
	rxent->server = ip->ip_dst;
	rxent->dport = dport;
	rxent->serviceId = rxh->serviceId;
	rxent->opcode = EXTRACT_32BITS(bp + sizeof(struct rx_header));
}

/*
 * Lookup an entry in the cache.  Also taken from print-nfs.c
 *
 * Note that because this is a reply, we're looking at the _source_
 * port.
 */

static int
rx_cache_find(const struct rx_header *rxh, const struct ip *ip, int sport,
	      int32_t *opcode)
{
	int i;
	struct rx_cache_entry *rxent;
	u_int32_t clip = ip->ip_dst.s_addr;
	u_int32_t sip = ip->ip_src.s_addr;

	/* Start the search where we last left off */

	i = rx_cache_hint;
	do {
		rxent = &rx_cache[i];
		if (rxent->callnum == rxh->callNumber &&
		    rxent->client.s_addr == clip &&
		    rxent->server.s_addr == sip && 
		    rxent->serviceId == rxh->serviceId &&
		    rxent->dport == sport) {

			/* We got a match! */

			rx_cache_hint = i;
			*opcode = rxent->opcode;
			return(1);
		}
		if (++i > RX_CACHE_SIZE)
			i = 0;
	} while (i != rx_cache_hint);

	/* Our search failed */
	return(0);
}

/*
 * These extrememly grody macros handle the printing of various AFS stuff.
 */

#define FIDOUT() { unsigned long n1, n2, n3; \
			TCHECK2(bp[0], sizeof(int32_t) * 3); \