/*
* Copyright: (c) 2000 United States Government as represented by the
* Secretary of the Navy. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. The names of the authors may not 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.
*/
/* \summary: AFS RX printer */
/*
* 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 <kenh@cmf.nrl.navy.mil>
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <string.h>
#include "netdissect-stdinc.h"
#include "netdissect.h"
#include "addrtoname.h"
#include "extract.h"
#include "ip.h"
#define FS_RX_PORT 7000
#define CB_RX_PORT 7001
#define PROT_RX_PORT 7002
#define VLDB_RX_PORT 7003
#define KAUTH_RX_PORT 7004
#define VOL_RX_PORT 7005
#define ERROR_RX_PORT 7006 /* Doesn't seem to be used */
#define BOS_RX_PORT 7007
#define AFSOPAQUEMAX 1024
#define AFSNAMEMAX 256 /* Must be >= PRNAMEMAX + 1, VLNAMEMAX + 1, and 32 + 1 */
#define PRNAMEMAX 64
#define VLNAMEMAX 65
#define KANAMEMAX 64
#define BOSNAMEMAX 256
#define USERNAMEMAX 1024 /* AFSOPAQUEMAX was used for this; does it need to be this big? */
#define PRSFS_READ 1 /* Read files */
#define PRSFS_WRITE 2 /* Write files */
#define PRSFS_INSERT 4 /* Insert files into a directory */
#define PRSFS_LOOKUP 8 /* Lookup files into a directory */
#define PRSFS_DELETE 16 /* Delete files */
#define PRSFS_LOCK 32 /* Lock files */
#define PRSFS_ADMINISTER 64 /* Change ACL's */
struct rx_header {
nd_uint32_t epoch;
nd_uint32_t cid;
nd_uint32_t callNumber;
nd_uint32_t seq;
nd_uint32_t serial;
nd_uint8_t type;
#define RX_PACKET_TYPE_DATA 1
#define RX_PACKET_TYPE_ACK 2
#define RX_PACKET_TYPE_BUSY 3
#define RX_PACKET_TYPE_ABORT 4
#define RX_PACKET_TYPE_ACKALL 5
#define RX_PACKET_TYPE_CHALLENGE 6
#define RX_PACKET_TYPE_RESPONSE 7
#define RX_PACKET_TYPE_DEBUG 8
#define RX_PACKET_TYPE_PARAMS 9
#define RX_PACKET_TYPE_VERSION 13
nd_uint8_t flags;
#define RX_CLIENT_INITIATED 1
#define RX_REQUEST_ACK 2
#define RX_LAST_PACKET 4
#define RX_MORE_PACKETS 8
#define RX_FREE_PACKET 16
#define RX_SLOW_START_OK 32
#define RX_JUMBO_PACKET 32
nd_uint8_t userStatus;
nd_uint8_t securityIndex;
nd_uint16_t spare; /* How clever: even though the AFS */
nd_uint16_t serviceId; /* header files indicate that the */
}; /* serviceId is first, it's really */
/* encoded _after_ the spare field */
/* I wasted a day figuring that out! */
#define NUM_RX_FLAGS 7
#define RX_MAXACKS 255
struct rx_ackPacket {
nd_uint16_t bufferSpace; /* Number of packet buffers available */
nd_uint16_t maxSkew; /* Max diff between ack'd packet and */
/* highest packet received */
nd_uint32_t firstPacket; /* The first packet in ack list */
nd_uint32_t previousPacket; /* Previous packet recv'd (obsolete) */
nd_uint32_t serial; /* # of packet that prompted the ack */
nd_uint8_t reason; /* Reason for acknowledgement */
nd_uint8_t nAcks; /* Number of acknowledgements */
/* Followed by nAcks acknowledgments */
#if 0
uint8_t acks[RX_MAXACKS]; /* Up to RX_MAXACKS acknowledgements */
#endif
};
/*
* Values for the acks array
*/
#define RX_ACK_TYPE_NACK 0 /* Don't have this packet */
#define RX_ACK_TYPE_ACK 1 /* I have this packet */
static const 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 const struct double_tok {
uint32_t flag; /* Rx flag */
uint32_t packetType; /* Packet type */
const char *s; /* Flag string */
} rx_flags[] = {
{ RX_CLIENT_INITIATED, 0, "client-init" },
{ RX_REQUEST_ACK, 0, "req-ack" },
{ RX_LAST_PACKET, 0, "last-pckt" },
{ RX_MORE_PACKETS, 0, "more-pckts" },
{ RX_FREE_PACKET, 0, "free-pckt" },
{ RX_SLOW_START_OK, RX_PACKET_TYPE_ACK, "slow-start" },
{ RX_JUMBO_PACKET, RX_PACKET_TYPE_DATA, "jumbogram" }
};
static const 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" },
{ 220, "residency" },
{ 65536, "inline-bulk-status" },
{ 65537, "fetch-data-64" },
{ 65538, "store-data-64" },
{ 65539, "give-up-all-cbs" },
{ 65540, "get-caps" },
{ 65541, "cb-rx-conn-addr" },
{ 0, NULL },
};
static const 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" },
{ 215, "getsrvprefs" },
{ 216, "getcellservdb" },
{ 217, "getlocalcell" },
{ 218, "getcacheconf" },
{ 65536, "getce64" },
{ 65537, "getcellbynum" },
{ 65538, "tellmeaboutyourself" },
{ 0, NULL },
};
static const 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" },
{ 521, "list-entries" },
{ 530, "list-super-groups" },
{ 0, NULL },
};
static const 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" },
{ 534, "list-attrib-n2" },
{ 0, NULL },
};
static const 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 const 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" },
{ 65536, "convert-ro" },
{ 65537, "get-size" },
{ 65538, "dump-v2" },
{ 0, NULL },
};
static const 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" },
{ 115, "get-restricted" },
{ 116, "set-restricted" },
{ 0, NULL },
};
static const struct tok ubik_req[] = {
{ 10000, "vote-beacon" },
{ 10001, "vote-debug-old" },
{ 10002, "vote-sdebug-old" },
{ 10003, "vote-getsyncsite" },
{ 10004, "vote-debug" },
{ 10005, "vote-sdebug" },
{ 10006, "vote-xdebug" },
{ 10007, "vote-xsdebug" },
{ 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 10007
#define DISK_LOW 20000
#define DISK_HIGH 20013
static const struct tok cb_types[] = {
{ 1, "exclusive" },
{ 2, "shared" },
{ 3, "dropped" },
{ 0, NULL },
};
static const struct tok ubik_lock_types[] = {
{ 1, "read" },
{ 2, "write" },
{ 3, "wait" },
{ 0, NULL },
};
static const char *voltype[] = { "read-write", "read-only", "backup" };
static const 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" },
{ 0xffffff9c, "restarting fileserver" }, /* -100, sic! */
{ 0, NULL }
};
/*
* Reasons for acknowledging a packet
*/
static const 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" },
{ 9, "idle" },
{ 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 {
uint32_t callnum; /* Call number (net order) */
uint32_t client; /* client IP address (net order) */
uint32_t server; /* server IP address (net order) */
uint16_t dport; /* server UDP port (host order) */
uint16_t serviceId; /* Service identifier (net order) */
uint32_t opcode; /* RX opcode (host order) */
};
#define RX_CACHE_SIZE 64
static struct rx_cache_entry rx_cache[RX_CACHE_SIZE];
static uint32_t rx_cache_next = 0;
static uint32_t rx_cache_hint = 0;
static void rx_cache_insert(netdissect_options *, const u_char *, const struct ip *, uint16_t);
static int rx_cache_find(netdissect_options *, const struct rx_header *,
const struct ip *, uint16_t, uint32_t *);
static void fs_print(netdissect_options *, const u_char *, u_int);
static void fs_reply_print(netdissect_options *, const u_char *, u_int, uint32_t);
static void acl_print(netdissect_options *, u_char *, u_char *);
static void cb_print(netdissect_options *, const u_char *, u_int);
static void cb_reply_print(netdissect_options *, const u_char *, u_int, uint32_t);
static void prot_print(netdissect_options *, const u_char *, u_int);
static void prot_reply_print(netdissect_options *, const u_char *, u_int, uint32_t);
static void vldb_print(netdissect_options *, const u_char *, u_int);
static void vldb_reply_print(netdissect_options *, const u_char *, u_int, uint32_t);
static void kauth_print(netdissect_options *, const u_char *, u_int);
static void kauth_reply_print(netdissect_options *, const u_char *, u_int, uint32_t);
static void vol_print(netdissect_options *, const u_char *, u_int);
static void vol_reply_print(netdissect_options *, const u_char *, u_int, uint32_t);
static void bos_print(netdissect_options *, const u_char *, u_int);
static void bos_reply_print(netdissect_options *, const u_char *, u_int, uint32_t);
static void ubik_print(netdissect_options *, const u_char *);
static void ubik_reply_print(netdissect_options *, const u_char *, u_int, uint32_t);
static void rx_ack_print(netdissect_options *, const u_char *, u_int);
static int is_ubik(uint32_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(netdissect_options *ndo,
const u_char *bp, u_int length, uint16_t sport, uint16_t dport,
const u_char *bp2)
{
const struct rx_header *rxh;
uint32_t i;
uint8_t type, flags;
uint32_t opcode;
ndo->ndo_protocol = "rx";
if (!ND_TTEST_LEN(bp, sizeof(struct rx_header))) {
ND_PRINT(" [|rx] (%u)", length);
return;
}
rxh = (const struct rx_header *) bp;
type = GET_U_1(rxh->type);
ND_PRINT(" rx %s", tok2str(rx_types, "type %u", type));
flags = GET_U_1(rxh->flags);
if (ndo->ndo_vflag) {
int firstflag = 0;
if (ndo->ndo_vflag > 1)
ND_PRINT(" cid %08x call# %u",
GET_BE_U_4(rxh->cid),
GET_BE_U_4(rxh->callNumber));
ND_PRINT(" seq %u ser %u",
GET_BE_U_4(rxh->seq),
GET_BE_U_4(rxh->serial));
if (ndo->ndo_vflag > 2)
ND_PRINT(" secindex %u serviceid %hu",
GET_U_1(rxh->securityIndex),
GET_BE_U_2(rxh->serviceId));
if (ndo->ndo_vflag > 1)
for (i = 0; i < NUM_RX_FLAGS; i++) {
if (flags & rx_flags[i].flag &&
(!rx_flags[i].packetType ||
type == rx_flags[i].packetType)) {
if (!firstflag) {
firstflag = 1;
ND_PRINT(" ");
} else {
ND_PRINT(",");
}
ND_PRINT("<%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 (type == RX_PACKET_TYPE_DATA &&
GET_BE_U_4(rxh->seq) == 1 &&
flags & RX_CLIENT_INITIATED) {
/*
* Insert this call into the call cache table, so we
* have a chance to print out replies
*/
rx_cache_insert(ndo, bp, (const struct ip *) bp2, dport);
switch (dport) {
case FS_RX_PORT: /* AFS file service */
fs_print(ndo, bp, length);
break;
case CB_RX_PORT: /* AFS callback service */
cb_print(ndo, bp, length);
break;
case PROT_RX_PORT: /* AFS protection service */
prot_print(ndo, bp, length);
break;
case VLDB_RX_PORT: /* AFS VLDB service */
vldb_print(ndo, bp, length);
break;
case KAUTH_RX_PORT: /* AFS Kerberos auth service */
kauth_print(ndo, bp, length);
break;
case VOL_RX_PORT: /* AFS Volume service */
vol_print(ndo, bp, length);
break;
case BOS_RX_PORT: /* AFS BOS service */
bos_print(ndo, 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 (((type == RX_PACKET_TYPE_DATA &&
GET_BE_U_4(rxh->seq) == 1) ||
type == RX_PACKET_TYPE_ABORT) &&
(flags & RX_CLIENT_INITIATED) == 0 &&
rx_cache_find(ndo, rxh, (const struct ip *) bp2,
sport, &opcode)) {
switch (sport) {
case FS_RX_PORT: /* AFS file service */
fs_reply_print(ndo, bp, length, opcode);
break;
case CB_RX_PORT: /* AFS callback service */
cb_reply_print(ndo, bp, length, opcode);
break;
case PROT_RX_PORT: /* AFS PT service */
prot_reply_print(ndo, bp, length, opcode);
break;
case VLDB_RX_PORT: /* AFS VLDB service */
vldb_reply_print(ndo, bp, length, opcode);
break;
case KAUTH_RX_PORT: /* AFS Kerberos auth service */
kauth_reply_print(ndo, bp, length, opcode);
break;
case VOL_RX_PORT: /* AFS Volume service */
vol_reply_print(ndo, bp, length, opcode);
break;
case BOS_RX_PORT: /* AFS BOS service */
bos_reply_print(ndo, 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 (type == RX_PACKET_TYPE_ACK)
rx_ack_print(ndo, bp, length);
ND_PRINT(" (%u)", length);
}
/*
* Insert an entry into the cache. Taken from print-nfs.c
*/
static void
rx_cache_insert(netdissect_options *ndo,
const u_char *bp, const struct ip *ip, uint16_t dport)
{
struct rx_cache_entry *rxent;
const struct rx_header *rxh = (const struct rx_header *) bp;
if (!ND_TTEST_4(bp + sizeof(struct rx_header)))
return;
rxent = &rx_cache[rx_cache_next];
if (++rx_cache_next >= RX_CACHE_SIZE)
rx_cache_next = 0;
rxent->callnum = GET_BE_U_4(rxh->callNumber);
rxent->client = GET_IPV4_TO_NETWORK_ORDER(ip->ip_src);
rxent->server = GET_IPV4_TO_NETWORK_ORDER(ip->ip_dst);
rxent->dport = dport;
rxent->serviceId = GET_BE_U_2(rxh->serviceId);
rxent->opcode = GET_BE_U_4(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(netdissect_options *ndo, const struct rx_header *rxh,
const struct ip *ip, uint16_t sport, uint32_t *opcode)
{
uint32_t i;
struct rx_cache_entry *rxent;
uint32_t clip;
uint32_t sip;
clip = GET_IPV4_TO_NETWORK_ORDER(ip->ip_dst);
sip = GET_IPV4_TO_NETWORK_ORDER(ip->ip_src);
/* Start the search where we last left off */
i = rx_cache_hint;
do {
rxent = &rx_cache[i];
if (rxent->callnum == GET_BE_U_4(rxh->callNumber) &&
rxent->client == clip &&
rxent->server == sip &&
rxent->serviceId == GET_BE_U_2(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 extremely grody macros handle the printing of various AFS stuff.
*/
#define FIDOUT() { uint32_t n1, n2, n3; \
ND_TCHECK_LEN(bp, sizeof(uint32_t) * 3); \
n1 = GET_BE_U_4(bp); \
bp += sizeof(uint32_t); \
n2 = GET_BE_U_4(bp); \
bp += sizeof(uint32_t); \
n3 = GET_BE_U_4(bp); \
bp += sizeof(uint32_t); \
ND_PRINT(" fid %u/%u/%u", n1, n2, n3); \
}
#define STROUT(MAX) { uint32_t _i; \
_i = GET_BE_U_4(bp); \
if (_i > (MAX)) \
goto trunc; \
bp += sizeof(uint32_t); \
ND_PRINT(" \""); \
if (nd_printn(ndo, bp, _i, ndo->ndo_snapend)) \
goto trunc; \
ND_PRINT("\""); \
bp += ((_i + sizeof(uint32_t) - 1) / sizeof(uint32_t)) * sizeof(uint32_t); \
}
#define INTOUT() { int32_t _i; \
_i = GET_BE_S_4(bp); \
bp += sizeof(int32_t); \
ND_PRINT(" %d", _i); \
}
#define UINTOUT() { uint32_t _i; \
_i = GET_BE_U_4(bp); \
bp += sizeof(uint32_t); \
ND_PRINT(" %u", _i); \
}
#define UINT64OUT() { uint64_t _i; \
_i = GET_BE_U_8(bp); \
bp += sizeof(uint64_t); \
ND_PRINT(" %" PRIu64, _i); \
}
#define DATEOUT() { time_t _t; struct tm *tm; char str[256]; \
_t = (time_t) GET_BE_S_4(bp); \
bp += sizeof(int32_t); \
tm = localtime(&_t); \
strftime(str, 256, "%Y/%m/%d %H:%M:%S", tm); \
ND_PRINT(" %s", str); \
}
#define STOREATTROUT() { uint32_t mask, _i; \
ND_TCHECK_LEN(bp, (sizeof(uint32_t) * 6)); \
mask = GET_BE_U_4(bp); bp += sizeof(uint32_t); \
if (mask) ND_PRINT(" StoreStatus"); \
if (mask & 1) { ND_PRINT(" date"); DATEOUT(); } \
else bp += sizeof(uint32_t); \
_i = GET_BE_U_4(bp); bp += sizeof(uint32_t); \
if (mask & 2) ND_PRINT(" owner %u", _i); \
_i = GET_BE_U_4(bp); bp += sizeof(uint32_t); \
if (mask & 4) ND_PRINT(" group %u", _i); \
_i = GET_BE_U_4(bp); bp += sizeof(uint32_t); \
if (mask & 8) ND_PRINT(" mode %o", _i & 07777); \
_i = GET_BE_U_4(bp); bp += sizeof(uint32_t); \
if (mask & 16) ND_PRINT(" segsize %u", _i); \
/* undocumented in 3.3 docu */ \
if (mask & 1024) ND_PRINT(" fsync"); \
}
#define UBIK_VERSIONOUT() {uint32_t epoch; uint32_t counter; \
ND_TCHECK_LEN(bp, sizeof(uint32_t) * 2); \
epoch = GET_BE_U_4(bp); \
bp += sizeof(uint32_t); \
counter = GET_BE_U_4(bp); \
bp += sizeof(uint32_t); \
ND_PRINT(" %u.%u", epoch, counter); \
}
#define AFSUUIDOUT() {uint32_t temp; int _i; \
ND_TCHECK_LEN(bp, 11 * sizeof(uint32_t)); \
temp = GET_BE_U_4(bp); \
bp += sizeof(uint32_t); \
ND_PRINT(" %08x", temp); \
temp = GET_BE_U_4(bp); \
bp += sizeof(uint32_t); \
ND_PRINT("%04x", temp); \
temp = GET_BE_U_4(bp); \
bp += sizeof(uint32_t); \
ND_PRINT("%04x", temp); \
for (_i = 0; _i < 8; _i++) { \
temp = GET_BE_U_4(bp); \
bp += sizeof(uint32_t); \
ND_PRINT("%02x", (unsigned char) temp); \
} \
}
/*
* This is the sickest one of all
* MAX is expected to be a constant here
*/
#define VECOUT(MAX) { u_char *sp; \
u_char s[(MAX) + 1]; \
uint32_t k; \
ND_TCHECK_LEN(bp, (MAX) * sizeof(uint32_t)); \
sp = s; \
for (k = 0; k < (MAX); k++) { \
*sp++ = (u_char) GET_BE_U_4(bp); \
bp += sizeof(uint32_t); \
} \
s[(MAX)] = '\0'; \
ND_PRINT(" \""); \
fn_print_str(ndo, s); \
ND_PRINT("\""); \
}
#define DESTSERVEROUT() { uint32_t n1, n2, n3; \
ND_TCHECK_LEN(bp, sizeof(uint32_t) * 3); \
n1 = GET_BE_U_4(bp); \
bp += sizeof(uint32_t); \
n2 = GET_BE_U_4(bp); \
bp += sizeof(uint32_t); \
n3 = GET_BE_U_4(bp); \
bp += sizeof(uint32_t); \
ND_PRINT(" server %u:%u:%u", n1, n2, n3); \
}
/*
* Handle calls to the AFS file service (fs)
*/
static void
fs_print(netdissect_options *ndo,
const u_char *bp, u_int length)
{
uint32_t fs_op;
uint32_t i;
if (length <= sizeof(struct rx_header))
return;
/*
* Print out the afs call we're invoking. The table used here was
* gleaned from fsint/afsint.xg
*/
fs_op = GET_BE_U_4(bp + sizeof(struct rx_header));
ND_PRINT(" fs call %s", tok2str(fs_req, "op#%u", fs_op));
/*
* Print out arguments to some of the AFS calls. This stuff is
* all from afsint.xg
*/
bp += sizeof(struct rx_header) + 4;
/*
* Sigh. This is gross. Ritchie forgive me.
*/
switch (fs_op) {
case 130: /* Fetch data */
FIDOUT();
ND_PRINT(" offset");
UINTOUT();
ND_PRINT(" length");
UINTOUT();
break;
case 131: /* Fetch ACL */
case 132: /* Fetch Status */
case 143: /* Old set lock */
case 144: /* Old extend lock */
case 145: /* Old release lock */
case 156: /* Set lock */
case 157: /* Extend lock */
case 158: /* Release lock */
FIDOUT();
break;
case 135: /* Store status */
FIDOUT();
STOREATTROUT();
break;
case 133: /* Store data */
FIDOUT();
STOREATTROUT();
ND_PRINT(" offset");
UINTOUT();
ND_PRINT(" length");
UINTOUT();
ND_PRINT(" flen");
UINTOUT();
break;
case 134: /* Store ACL */
{
char a[AFSOPAQUEMAX+1];
FIDOUT();
i = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
ND_TCHECK_LEN(bp, i);
i = ND_MIN(AFSOPAQUEMAX, i);
strncpy(a, (const char *) bp, i);
a[i] = '\0';
acl_print(ndo, (u_char *) a, (u_char *) a + i);
break;
}
case 137: /* Create file */
case 141: /* MakeDir */
FIDOUT();
STROUT(AFSNAMEMAX);
STOREATTROUT();
break;
case 136: /* Remove file */
case 142: /* Remove directory */
FIDOUT();
STROUT(AFSNAMEMAX);
break;
case 138: /* Rename file */
ND_PRINT(" old");
FIDOUT();
STROUT(AFSNAMEMAX);
ND_PRINT(" new");
FIDOUT();
STROUT(AFSNAMEMAX);
break;
case 139: /* Symlink */
FIDOUT();
STROUT(AFSNAMEMAX);
ND_PRINT(" link to");
STROUT(AFSNAMEMAX);
break;
case 140: /* Link */
FIDOUT();
STROUT(AFSNAMEMAX);
ND_PRINT(" link to");
FIDOUT();
break;
case 148: /* Get volume info */
STROUT(AFSNAMEMAX);
break;
case 149: /* Get volume stats */
case 150: /* Set volume stats */
ND_PRINT(" volid");
UINTOUT();
break;
case 154: /* New get volume info */
ND_PRINT(" volname");
STROUT(AFSNAMEMAX);
break;
case 155: /* Bulk stat */
case 65536: /* Inline bulk stat */
{
uint32_t j;
j = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
for (i = 0; i < j; i++) {
FIDOUT();
if (i != j - 1)
ND_PRINT(",");
}
if (j == 0)
ND_PRINT(" <none!>");
break;
}
case 65537: /* Fetch data 64 */
FIDOUT();
ND_PRINT(" offset");
UINT64OUT();
ND_PRINT(" length");
UINT64OUT();
break;
case 65538: /* Store data 64 */
FIDOUT();
STOREATTROUT();
ND_PRINT(" offset");
UINT64OUT();
ND_PRINT(" length");
UINT64OUT();
ND_PRINT(" flen");
UINT64OUT();
break;
case 65541: /* CallBack rx conn address */
ND_PRINT(" addr");
UINTOUT();
default:
;
}
return;
trunc:
ND_PRINT(" [|fs]");
}
/*
* Handle replies to the AFS file service
*/
static void
fs_reply_print(netdissect_options *ndo,
const u_char *bp, u_int length, uint32_t opcode)
{
uint32_t i;
const struct rx_header *rxh;
uint8_t type;
if (length <= sizeof(struct rx_header))
return;
rxh = (const struct rx_header *) bp;
/*
* Print out the afs call we're invoking. The table used here was
* gleaned from fsint/afsint.xg
*/
ND_PRINT(" fs reply %s", tok2str(fs_req, "op#%u", opcode));
type = GET_U_1(rxh->type);
bp += sizeof(struct rx_header);
/*
* If it was a data packet, interpret the response
*/
if (type == RX_PACKET_TYPE_DATA) {
switch (opcode) {
case 131: /* Fetch ACL */
{
char a[AFSOPAQUEMAX+1];
i = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
ND_TCHECK_LEN(bp, i);
i = ND_MIN(AFSOPAQUEMAX, i);
strncpy(a, (const char *) bp, i);
a[i] = '\0';
acl_print(ndo, (u_char *) a, (u_char *) a + i);
break;
}
case 137: /* Create file */
case 141: /* MakeDir */
ND_PRINT(" new");
FIDOUT();
break;
case 151: /* Get root volume */
ND_PRINT(" root volume");
STROUT(AFSNAMEMAX);
break;
case 153: /* Get time */
DATEOUT();
break;
default:
;
}
} else if (type == RX_PACKET_TYPE_ABORT) {
/*
* Otherwise, just print out the return code
*/
int32_t errcode;
errcode = GET_BE_S_4(bp);
bp += sizeof(int32_t);
ND_PRINT(" error %s", tok2str(afs_fs_errors, "#%d", errcode));
} else {
ND_PRINT(" strange fs reply of type %u", type);
}
return;
trunc:
ND_PRINT(" [|fs]");
}
/*
* Print out an AFS ACL string. An AFS ACL is a string that has the
* following format:
*
* <positive> <negative>
* <uid1> <aclbits1>
* ....
*
* "positive" and "negative" are integers which contain the number of
* positive and negative ACL's in the string. The uid/aclbits pair are
* ASCII strings containing the UID/PTS record and an ASCII number
* representing a logical OR of all the ACL permission bits
*/
#define NUMSTRINGIFY(x) XSTRINGIFY(x)
static void
acl_print(netdissect_options *ndo,
u_char *s, u_char *end)
{
int pos, neg, acl;
int n, i;
char user[USERNAMEMAX+1];
if (sscanf((char *) s, "%d %d\n%n", &pos, &neg, &n) != 2)
return;
s += n;
if (s > end)
return;
/*
* This wacky order preserves the order used by the "fs" command
*/
#define ACLOUT(acl) \
ND_PRINT("%s%s%s%s%s%s%s", \
acl & PRSFS_READ ? "r" : "", \
acl & PRSFS_LOOKUP ? "l" : "", \
acl & PRSFS_INSERT ? "i" : "", \
acl & PRSFS_DELETE ? "d" : "", \
acl & PRSFS_WRITE ? "w" : "", \
acl & PRSFS_LOCK ? "k" : "", \
acl & PRSFS_ADMINISTER ? "a" : "");
for (i = 0; i < pos; i++) {
if (sscanf((char *) s, "%" NUMSTRINGIFY(USERNAMEMAX) "s %d\n%n", user, &acl, &n) != 2)
return;
s += n;
ND_PRINT(" +{");
fn_print_str(ndo, (u_char *)user);
ND_PRINT(" ");
ACLOUT(acl);
ND_PRINT("}");
if (s > end)
return;
}
for (i = 0; i < neg; i++) {
if (sscanf((char *) s, "%" NUMSTRINGIFY(USERNAMEMAX) "s %d\n%n", user, &acl, &n) != 2)
return;
s += n;
ND_PRINT(" -{");
fn_print_str(ndo, (u_char *)user);
ND_PRINT(" ");
ACLOUT(acl);
ND_PRINT("}");
if (s > end)
return;
}
}
#undef ACLOUT
/*
* Handle calls to the AFS callback service
*/
static void
cb_print(netdissect_options *ndo,
const u_char *bp, u_int length)
{
uint32_t cb_op;
uint32_t i;
if (length <= sizeof(struct rx_header))
return;
/*
* Print out the afs call we're invoking. The table used here was
* gleaned from fsint/afscbint.xg
*/
cb_op = GET_BE_U_4(bp + sizeof(struct rx_header));
ND_PRINT(" cb call %s", tok2str(cb_req, "op#%u", cb_op));
bp += sizeof(struct rx_header) + 4;
/*
* Print out the afs call we're invoking. The table used here was
* gleaned from fsint/afscbint.xg
*/
switch (cb_op) {
case 204: /* Callback */
{
uint32_t j, t;
j = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
for (i = 0; i < j; i++) {
FIDOUT();
if (i != j - 1)
ND_PRINT(",");
}
if (j == 0)
ND_PRINT(" <none!>");
j = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
if (j != 0)
ND_PRINT(";");
for (i = 0; i < j; i++) {
ND_PRINT(" ver");
INTOUT();
ND_PRINT(" expires");
DATEOUT();
t = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
tok2str(cb_types, "type %u", t);
}
break;
}
case 214: {
ND_PRINT(" afsuuid");
AFSUUIDOUT();
break;
}
default:
;
}
return;
trunc:
ND_PRINT(" [|cb]");
}
/*
* Handle replies to the AFS Callback Service
*/
static void
cb_reply_print(netdissect_options *ndo,
const u_char *bp, u_int length, uint32_t opcode)
{
const struct rx_header *rxh;
uint8_t type;
if (length <= sizeof(struct rx_header))
return;
rxh = (const struct rx_header *) bp;
/*
* Print out the afs call we're invoking. The table used here was
* gleaned from fsint/afscbint.xg
*/
ND_PRINT(" cb reply %s", tok2str(cb_req, "op#%u", opcode));
type = GET_U_1(rxh->type);
bp += sizeof(struct rx_header);
/*
* If it was a data packet, interpret the response.
*/
if (type == RX_PACKET_TYPE_DATA)
switch (opcode) {
case 213: /* InitCallBackState3 */
AFSUUIDOUT();
break;
default:
;
}
else {
/*
* Otherwise, just print out the return code
*/
ND_PRINT(" errcode");
INTOUT();
}
return;
trunc:
ND_PRINT(" [|cb]");
}
/*
* Handle calls to the AFS protection database server
*/
static void
prot_print(netdissect_options *ndo,
const u_char *bp, u_int length)
{
uint32_t i;
uint32_t pt_op;
if (length <= sizeof(struct rx_header))
return;
/*
* Print out the afs call we're invoking. The table used here was
* gleaned from ptserver/ptint.xg
*/
pt_op = GET_BE_U_4(bp + sizeof(struct rx_header));
ND_PRINT(" pt");
if (is_ubik(pt_op)) {
ubik_print(ndo, bp);
return;
}
ND_PRINT(" call %s", tok2str(pt_req, "op#%u", pt_op));
/*
* Decode some of the arguments to the PT calls
*/
bp += sizeof(struct rx_header) + 4;
switch (pt_op) {
case 500: /* I New User */
STROUT(PRNAMEMAX);
ND_PRINT(" id");
INTOUT();
ND_PRINT(" oldid");
INTOUT();
break;
case 501: /* Where is it */
case 506: /* Delete */
case 508: /* Get CPS */
case 512: /* List entry */
case 514: /* List elements */
case 517: /* List owned */
case 518: /* Get CPS2 */
case 519: /* Get host CPS */
case 530: /* List super groups */
ND_PRINT(" id");
INTOUT();
break;
case 502: /* Dump entry */
ND_PRINT(" pos");
INTOUT();
break;
case 503: /* Add to group */
case 507: /* Remove from group */
case 515: /* Is a member of? */
ND_PRINT(" uid");
INTOUT();
ND_PRINT(" gid");
INTOUT();
break;
case 504: /* Name to ID */
{
uint32_t j;
j = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
/*
* Who designed this chicken-shit protocol?
*
* Each character is stored as a 32-bit
* integer!
*/
for (i = 0; i < j; i++) {
VECOUT(PRNAMEMAX);
}
if (j == 0)
ND_PRINT(" <none!>");
}
break;
case 505: /* Id to name */
{
uint32_t j;
ND_PRINT(" ids:");
i = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
for (j = 0; j < i; j++)
INTOUT();
if (j == 0)
ND_PRINT(" <none!>");
}
break;
case 509: /* New entry */
STROUT(PRNAMEMAX);
ND_PRINT(" flag");
INTOUT();
ND_PRINT(" oid");
INTOUT();
break;
case 511: /* Set max */
ND_PRINT(" id");
INTOUT();
ND_PRINT(" gflag");
INTOUT();
break;
case 513: /* Change entry */
ND_PRINT(" id");
INTOUT();
STROUT(PRNAMEMAX);
ND_PRINT(" oldid");
INTOUT();
ND_PRINT(" newid");
INTOUT();
break;
case 520: /* Update entry */
ND_PRINT(" id");
INTOUT();
STROUT(PRNAMEMAX);
break;
default:
;
}
return;
trunc:
ND_PRINT(" [|pt]");
}
/*
* Handle replies to the AFS protection service
*/
static void
prot_reply_print(netdissect_options *ndo,
const u_char *bp, u_int length, uint32_t opcode)
{
const struct rx_header *rxh;
uint8_t type;
uint32_t i;
if (length < sizeof(struct rx_header))
return;
rxh = (const struct rx_header *) bp;
/*
* Print out the afs call we're invoking. The table used here was
* gleaned from ptserver/ptint.xg. Check to see if it's a
* Ubik call, however.
*/
ND_PRINT(" pt");
if (is_ubik(opcode)) {
ubik_reply_print(ndo, bp, length, opcode);
return;
}
ND_PRINT(" reply %s", tok2str(pt_req, "op#%u", opcode));
type = GET_U_1(rxh->type);
bp += sizeof(struct rx_header);
/*
* If it was a data packet, interpret the response
*/
if (type == RX_PACKET_TYPE_DATA)
switch (opcode) {
case 504: /* Name to ID */
{
uint32_t j;
ND_PRINT(" ids:");
i = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
for (j = 0; j < i; j++)
INTOUT();
if (j == 0)
ND_PRINT(" <none!>");
}
break;
case 505: /* ID to name */
{
uint32_t j;
j = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
/*
* Who designed this chicken-shit protocol?
*
* Each character is stored as a 32-bit
* integer!
*/
for (i = 0; i < j; i++) {
VECOUT(PRNAMEMAX);
}
if (j == 0)
ND_PRINT(" <none!>");
}
break;
case 508: /* Get CPS */
case 514: /* List elements */
case 517: /* List owned */
case 518: /* Get CPS2 */
case 519: /* Get host CPS */
{
uint32_t j;
j = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
for (i = 0; i < j; i++) {
INTOUT();
}
if (j == 0)
ND_PRINT(" <none!>");
}
break;
case 510: /* List max */
ND_PRINT(" maxuid");
INTOUT();
ND_PRINT(" maxgid");
INTOUT();
break;
default:
;
}
else {
/*
* Otherwise, just print out the return code
*/
ND_PRINT(" errcode");
INTOUT();
}
return;
trunc:
ND_PRINT(" [|pt]");
}
/*
* Handle calls to the AFS volume location database service
*/
static void
vldb_print(netdissect_options *ndo,
const u_char *bp, u_int length)
{
uint32_t vldb_op;
uint32_t i;
if (length <= sizeof(struct rx_header))
return;
/*
* Print out the afs call we're invoking. The table used here was
* gleaned from vlserver/vldbint.xg
*/
vldb_op = GET_BE_U_4(bp + sizeof(struct rx_header));
ND_PRINT(" vldb");
if (is_ubik(vldb_op)) {
ubik_print(ndo, bp);
return;
}
ND_PRINT(" call %s", tok2str(vldb_req, "op#%u", vldb_op));
/*
* Decode some of the arguments to the VLDB calls
*/
bp += sizeof(struct rx_header) + 4;
switch (vldb_op) {
case 501: /* Create new volume */
case 517: /* Create entry N */
VECOUT(VLNAMEMAX);
break;
case 502: /* Delete entry */
case 503: /* Get entry by ID */
case 507: /* Update entry */
case 508: /* Set lock */
case 509: /* Release lock */
case 518: /* Get entry by ID N */
ND_PRINT(" volid");
INTOUT();
i = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
if (i <= 2)
ND_PRINT(" type %s", voltype[i]);
break;
case 504: /* Get entry by name */
case 519: /* Get entry by name N */
case 524: /* Update entry by name */
case 527: /* Get entry by name U */
STROUT(VLNAMEMAX);
break;
case 505: /* Get new vol id */
ND_PRINT(" bump");
INTOUT();
break;
case 506: /* Replace entry */
case 520: /* Replace entry N */
ND_PRINT(" volid");
INTOUT();
i = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
if (i <= 2)
ND_PRINT(" type %s", voltype[i]);
VECOUT(VLNAMEMAX);
break;
case 510: /* List entry */
case 521: /* List entry N */
ND_PRINT(" index");
INTOUT();
break;
default:
;
}
return;
trunc:
ND_PRINT(" [|vldb]");
}
/*
* Handle replies to the AFS volume location database service
*/
static void
vldb_reply_print(netdissect_options *ndo,
const u_char *bp, u_int length, uint32_t opcode)
{
const struct rx_header *rxh;
uint8_t type;
uint32_t i;
if (length < sizeof(struct rx_header))
return;
rxh = (const struct rx_header *) bp;
/*
* Print out the afs call we're invoking. The table used here was
* gleaned from vlserver/vldbint.xg. Check to see if it's a
* Ubik call, however.
*/
ND_PRINT(" vldb");
if (is_ubik(opcode)) {
ubik_reply_print(ndo, bp, length, opcode);
return;
}
ND_PRINT(" reply %s", tok2str(vldb_req, "op#%u", opcode));
type = GET_U_1(rxh->type);
bp += sizeof(struct rx_header);
/*
* If it was a data packet, interpret the response
*/
if (type == RX_PACKET_TYPE_DATA)
switch (opcode) {
case 510: /* List entry */
ND_PRINT(" count");
INTOUT();
ND_PRINT(" nextindex");
INTOUT();
ND_FALL_THROUGH;
case 503: /* Get entry by id */
case 504: /* Get entry by name */
{ uint32_t nservers, j;
VECOUT(VLNAMEMAX);
ND_TCHECK_4(bp);
bp += sizeof(uint32_t);
ND_PRINT(" numservers");
nservers = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
ND_PRINT(" %u", nservers);
ND_PRINT(" servers");
for (i = 0; i < 8; i++) {
ND_TCHECK_4(bp);
if (i < nservers)
ND_PRINT(" %s",
intoa(GET_IPV4_TO_NETWORK_ORDER(bp)));
bp += sizeof(nd_ipv4);
}
ND_PRINT(" partitions");
for (i = 0; i < 8; i++) {
j = GET_BE_U_4(bp);
if (i < nservers && j <= 26)
ND_PRINT(" %c", 'a' + j);
else if (i < nservers)
ND_PRINT(" %u", j);
bp += sizeof(uint32_t);
}
ND_TCHECK_LEN(bp, 8 * sizeof(uint32_t));
bp += 8 * sizeof(uint32_t);
ND_PRINT(" rwvol");
UINTOUT();
ND_PRINT(" rovol");
UINTOUT();
ND_PRINT(" backup");
UINTOUT();
}
break;
case 505: /* Get new volume ID */
ND_PRINT(" newvol");
UINTOUT();
break;
case 521: /* List entry */
case 529: /* List entry U */
ND_PRINT(" count");
INTOUT();
ND_PRINT(" nextindex");
INTOUT();
ND_FALL_THROUGH;
case 518: /* Get entry by ID N */
case 519: /* Get entry by name N */
{ uint32_t nservers, j;
VECOUT(VLNAMEMAX);
ND_PRINT(" numservers");
nservers = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
ND_PRINT(" %u", nservers);
ND_PRINT(" servers");
for (i = 0; i < 13; i++) {
ND_TCHECK_4(bp);
if (i < nservers)
ND_PRINT(" %s",
intoa(GET_IPV4_TO_NETWORK_ORDER(bp)));
bp += sizeof(nd_ipv4);
}
ND_PRINT(" partitions");
for (i = 0; i < 13; i++) {
j = GET_BE_U_4(bp);
if (i < nservers && j <= 26)
ND_PRINT(" %c", 'a' + j);
else if (i < nservers)
ND_PRINT(" %u", j);
bp += sizeof(uint32_t);
}
ND_TCHECK_LEN(bp, 13 * sizeof(uint32_t));
bp += 13 * sizeof(uint32_t);
ND_PRINT(" rwvol");
UINTOUT();
ND_PRINT(" rovol");
UINTOUT();
ND_PRINT(" backup");
UINTOUT();
}
break;
case 526: /* Get entry by ID U */
case 527: /* Get entry by name U */
{ uint32_t nservers, j;
VECOUT(VLNAMEMAX);
ND_PRINT(" numservers");
nservers = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
ND_PRINT(" %u", nservers);
ND_PRINT(" servers");
for (i = 0; i < 13; i++) {
if (i < nservers) {
ND_PRINT(" afsuuid");
AFSUUIDOUT();
} else {
ND_TCHECK_LEN(bp, 44);
bp += 44;
}
}
ND_TCHECK_LEN(bp, 4 * 13);
bp += 4 * 13;
ND_PRINT(" partitions");
for (i = 0; i < 13; i++) {
j = GET_BE_U_4(bp);
if (i < nservers && j <= 26)
ND_PRINT(" %c", 'a' + j);
else if (i < nservers)
ND_PRINT(" %u", j);
bp += sizeof(uint32_t);
}
ND_TCHECK_LEN(bp, 13 * sizeof(uint32_t));
bp += 13 * sizeof(uint32_t);
ND_PRINT(" rwvol");
UINTOUT();
ND_PRINT(" rovol");
UINTOUT();
ND_PRINT(" backup");
UINTOUT();
}
default:
;
}
else {
/*
* Otherwise, just print out the return code
*/
ND_PRINT(" errcode");
INTOUT();
}
return;
trunc:
ND_PRINT(" [|vldb]");
}
/*
* Handle calls to the AFS Kerberos Authentication service
*/
static void
kauth_print(netdissect_options *ndo,
const u_char *bp, u_int length)
{
uint32_t kauth_op;
if (length <= sizeof(struct rx_header))
return;
/*
* Print out the afs call we're invoking. The table used here was
* gleaned from kauth/kauth.rg
*/
kauth_op = GET_BE_U_4(bp + sizeof(struct rx_header));
ND_PRINT(" kauth");
if (is_ubik(kauth_op)) {
ubik_print(ndo, bp);
return;
}
ND_PRINT(" call %s", tok2str(kauth_req, "op#%u", kauth_op));
/*
* Decode some of the arguments to the KA calls
*/
bp += sizeof(struct rx_header) + 4;
switch (kauth_op) {
case 1: /* Authenticate old */
case 21: /* Authenticate */
case 22: /* Authenticate-V2 */
case 2: /* Change PW */
case 5: /* Set fields */
case 6: /* Create user */
case 7: /* Delete user */
case 8: /* Get entry */
case 14: /* Unlock */
case 15: /* Lock status */
ND_PRINT(" principal");
STROUT(KANAMEMAX);
STROUT(KANAMEMAX);
break;
case 3: /* GetTicket-old */
case 23: /* GetTicket */
{
uint32_t i;
ND_PRINT(" kvno");
INTOUT();
ND_PRINT(" domain");
STROUT(KANAMEMAX);
i = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
ND_TCHECK_LEN(bp, i);
bp += i;
ND_PRINT(" principal");
STROUT(KANAMEMAX);
STROUT(KANAMEMAX);
break;
}
case 4: /* Set Password */
ND_PRINT(" principal");
STROUT(KANAMEMAX);
STROUT(KANAMEMAX);
ND_PRINT(" kvno");
INTOUT();
break;
case 12: /* Get password */
ND_PRINT(" name");
STROUT(KANAMEMAX);
break;
default:
;
}
return;
trunc:
ND_PRINT(" [|kauth]");
}
/*
* Handle replies to the AFS Kerberos Authentication Service
*/
static void
kauth_reply_print(netdissect_options *ndo,
const u_char *bp, u_int length, uint32_t opcode)
{
const struct rx_header *rxh;
uint8_t type;
if (length <= sizeof(struct rx_header))
return;
rxh = (const struct rx_header *) bp;
/*
* Print out the afs call we're invoking. The table used here was
* gleaned from kauth/kauth.rg
*/
ND_PRINT(" kauth");
if (is_ubik(opcode)) {
ubik_reply_print(ndo, bp, length, opcode);
return;
}
ND_PRINT(" reply %s", tok2str(kauth_req, "op#%u", opcode));
type = GET_U_1(rxh->type);
bp += sizeof(struct rx_header);
/*
* If it was a data packet, interpret the response.
*/
if (type == RX_PACKET_TYPE_DATA)
/* Well, no, not really. Leave this for later */
;
else {
/*
* Otherwise, just print out the return code
*/
ND_PRINT(" errcode");
INTOUT();
}
}
/*
* Handle calls to the AFS Volume location service
*/
static void
vol_print(netdissect_options *ndo,
const u_char *bp, u_int length)
{
uint32_t vol_op;
if (length <= sizeof(struct rx_header))
return;
/*
* Print out the afs call we're invoking. The table used here was
* gleaned from volser/volint.xg
*/
vol_op = GET_BE_U_4(bp + sizeof(struct rx_header));
ND_PRINT(" vol call %s", tok2str(vol_req, "op#%u", vol_op));
bp += sizeof(struct rx_header) + 4;
switch (vol_op) {
case 100: /* Create volume */
ND_PRINT(" partition");
UINTOUT();
ND_PRINT(" name");
STROUT(AFSNAMEMAX);
ND_PRINT(" type");
UINTOUT();
ND_PRINT(" parent");
UINTOUT();
break;
case 101: /* Delete volume */
case 107: /* Get flags */
ND_PRINT(" trans");
UINTOUT();
break;
case 102: /* Restore */
ND_PRINT(" totrans");
UINTOUT();
ND_PRINT(" flags");
UINTOUT();
break;
case 103: /* Forward */
ND_PRINT(" fromtrans");
UINTOUT();
ND_PRINT(" fromdate");
DATEOUT();
DESTSERVEROUT();
ND_PRINT(" desttrans");
INTOUT();
break;
case 104: /* End trans */
ND_PRINT(" trans");
UINTOUT();
break;
case 105: /* Clone */
ND_PRINT(" trans");
UINTOUT();
ND_PRINT(" purgevol");
UINTOUT();
ND_PRINT(" newtype");
UINTOUT();
ND_PRINT(" newname");
STROUT(AFSNAMEMAX);
break;
case 106: /* Set flags */
ND_PRINT(" trans");
UINTOUT();
ND_PRINT(" flags");
UINTOUT();
break;
case 108: /* Trans create */
ND_PRINT(" vol");
UINTOUT();
ND_PRINT(" partition");
UINTOUT();
ND_PRINT(" flags");
UINTOUT();
break;
case 109: /* Dump */
case 655537: /* Get size */
ND_PRINT(" fromtrans");
UINTOUT();
ND_PRINT(" fromdate");
DATEOUT();
break;
case 110: /* Get n-th volume */
ND_PRINT(" index");
UINTOUT();
break;
case 111: /* Set forwarding */
ND_PRINT(" tid");
UINTOUT();
ND_PRINT(" newsite");
UINTOUT();
break;
case 112: /* Get name */
case 113: /* Get status */
ND_PRINT(" tid");
break;
case 114: /* Signal restore */
ND_PRINT(" name");
STROUT(AFSNAMEMAX);
ND_PRINT(" type");
UINTOUT();
ND_PRINT(" pid");
UINTOUT();
ND_PRINT(" cloneid");
UINTOUT();
break;
case 116: /* List volumes */
ND_PRINT(" partition");
UINTOUT();
ND_PRINT(" flags");
UINTOUT();
break;
case 117: /* Set id types */
ND_PRINT(" tid");
UINTOUT();
ND_PRINT(" name");
STROUT(AFSNAMEMAX);
ND_PRINT(" type");
UINTOUT();
ND_PRINT(" pid");
UINTOUT();
ND_PRINT(" clone");
UINTOUT();
ND_PRINT(" backup");
UINTOUT();
break;
case 119: /* Partition info */
ND_PRINT(" name");
STROUT(AFSNAMEMAX);
break;
case 120: /* Reclone */
ND_PRINT(" tid");
UINTOUT();
break;
case 121: /* List one volume */
case 122: /* Nuke volume */
case 124: /* Extended List volumes */
case 125: /* Extended List one volume */
case 65536: /* Convert RO to RW volume */
ND_PRINT(" partid");
UINTOUT();
ND_PRINT(" volid");
UINTOUT();
break;
case 123: /* Set date */
ND_PRINT(" tid");
UINTOUT();
ND_PRINT(" date");
DATEOUT();
break;
case 126: /* Set info */
ND_PRINT(" tid");
UINTOUT();
break;
case 128: /* Forward multiple */
ND_PRINT(" fromtrans");
UINTOUT();
ND_PRINT(" fromdate");
DATEOUT();
{
uint32_t i, j;
j = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
for (i = 0; i < j; i++) {
DESTSERVEROUT();
if (i != j - 1)
ND_PRINT(",");
}
if (j == 0)
ND_PRINT(" <none!>");
}
break;
case 65538: /* Dump version 2 */
ND_PRINT(" fromtrans");
UINTOUT();
ND_PRINT(" fromdate");
DATEOUT();
ND_PRINT(" flags");
UINTOUT();
break;
default:
;
}
return;
trunc:
ND_PRINT(" [|vol]");
}
/*
* Handle replies to the AFS Volume Service
*/
static void
vol_reply_print(netdissect_options *ndo,
const u_char *bp, u_int length, uint32_t opcode)
{
const struct rx_header *rxh;
uint8_t type;
if (length <= sizeof(struct rx_header))
return;
rxh = (const struct rx_header *) bp;
/*
* Print out the afs call we're invoking. The table used here was
* gleaned from volser/volint.xg
*/
ND_PRINT(" vol reply %s", tok2str(vol_req, "op#%u", opcode));
type = GET_U_1(rxh->type);
bp += sizeof(struct rx_header);
/*
* If it was a data packet, interpret the response.
*/
if (type == RX_PACKET_TYPE_DATA) {
switch (opcode) {
case 100: /* Create volume */
ND_PRINT(" volid");
UINTOUT();
ND_PRINT(" trans");
UINTOUT();
break;
case 104: /* End transaction */
UINTOUT();
break;
case 105: /* Clone */
ND_PRINT(" newvol");
UINTOUT();
break;
case 107: /* Get flags */
UINTOUT();
break;
case 108: /* Transaction create */
ND_PRINT(" trans");
UINTOUT();
break;
case 110: /* Get n-th volume */
ND_PRINT(" volume");
UINTOUT();
ND_PRINT(" partition");
UINTOUT();
break;
case 112: /* Get name */
STROUT(AFSNAMEMAX);
break;
case 113: /* Get status */
ND_PRINT(" volid");
UINTOUT();
ND_PRINT(" nextuniq");
UINTOUT();
ND_PRINT(" type");
UINTOUT();
ND_PRINT(" parentid");
UINTOUT();
ND_PRINT(" clone");
UINTOUT();
ND_PRINT(" backup");
UINTOUT();
ND_PRINT(" restore");
UINTOUT();
ND_PRINT(" maxquota");
UINTOUT();
ND_PRINT(" minquota");
UINTOUT();
ND_PRINT(" owner");
UINTOUT();
ND_PRINT(" create");
DATEOUT();
ND_PRINT(" access");
DATEOUT();
ND_PRINT(" update");
DATEOUT();
ND_PRINT(" expire");
DATEOUT();
ND_PRINT(" backup");
DATEOUT();
ND_PRINT(" copy");
DATEOUT();
break;
case 115: /* Old list partitions */
break;
case 116: /* List volumes */
case 121: /* List one volume */
{
uint32_t i, j;
j = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
for (i = 0; i < j; i++) {
ND_PRINT(" name");
VECOUT(32);
ND_PRINT(" volid");
UINTOUT();
ND_PRINT(" type");
bp += sizeof(uint32_t) * 21;
if (i != j - 1)
ND_PRINT(",");
}
if (j == 0)
ND_PRINT(" <none!>");
}
break;
default:
;
}
} else {
/*
* Otherwise, just print out the return code
*/
ND_PRINT(" errcode");
INTOUT();
}
return;
trunc:
ND_PRINT(" [|vol]");
}
/*
* Handle calls to the AFS BOS service
*/
static void
bos_print(netdissect_options *ndo,
const u_char *bp, u_int length)
{
uint32_t bos_op;
if (length <= sizeof(struct rx_header))
return;
/*
* Print out the afs call we're invoking. The table used here was
* gleaned from bozo/bosint.xg
*/
bos_op = GET_BE_U_4(bp + sizeof(struct rx_header));
ND_PRINT(" bos call %s", tok2str(bos_req, "op#%u", bos_op));
/*
* Decode some of the arguments to the BOS calls
*/
bp += sizeof(struct rx_header) + 4;
switch (bos_op) {
case 80: /* Create B node */
ND_PRINT(" type");
STROUT(BOSNAMEMAX);
ND_PRINT(" instance");
STROUT(BOSNAMEMAX);
break;
case 81: /* Delete B node */
case 83: /* Get status */
case 85: /* Get instance info */
case 87: /* Add super user */
case 88: /* Delete super user */
case 93: /* Set cell name */
case 96: /* Add cell host */
case 97: /* Delete cell host */
case 104: /* Restart */
case 106: /* Uninstall */
case 108: /* Exec */
case 112: /* Getlog */
case 114: /* Get instance strings */
STROUT(BOSNAMEMAX);
break;
case 82: /* Set status */
case 98: /* Set T status */
STROUT(BOSNAMEMAX);
ND_PRINT(" status");
INTOUT();
break;
case 86: /* Get instance parm */
STROUT(BOSNAMEMAX);
ND_PRINT(" num");
INTOUT();
break;
case 84: /* Enumerate instance */
case 89: /* List super users */
case 90: /* List keys */
case 91: /* Add key */
case 92: /* Delete key */
case 95: /* Get cell host */
INTOUT();
break;
case 105: /* Install */
STROUT(BOSNAMEMAX);
ND_PRINT(" size");
INTOUT();
ND_PRINT(" flags");
INTOUT();
ND_PRINT(" date");
INTOUT();
break;
default:
;
}
return;
trunc:
ND_PRINT(" [|bos]");
}
/*
* Handle replies to the AFS BOS Service
*/
static void
bos_reply_print(netdissect_options *ndo,
const u_char *bp, u_int length, uint32_t opcode)
{
const struct rx_header *rxh;
uint8_t type;
if (length <= sizeof(struct rx_header))
return;
rxh = (const struct rx_header *) bp;
/*
* Print out the afs call we're invoking. The table used here was
* gleaned from volser/volint.xg
*/
ND_PRINT(" bos reply %s", tok2str(bos_req, "op#%u", opcode));
type = GET_U_1(rxh->type);
bp += sizeof(struct rx_header);
/*
* If it was a data packet, interpret the response.
*/
if (type == RX_PACKET_TYPE_DATA)
/* Well, no, not really. Leave this for later */
;
else {
/*
* Otherwise, just print out the return code
*/
ND_PRINT(" errcode");
INTOUT();
}
}
/*
* Check to see if this is a Ubik opcode.
*/
static int
is_ubik(uint32_t opcode)
{
if ((opcode >= VOTE_LOW && opcode <= VOTE_HIGH) ||
(opcode >= DISK_LOW && opcode <= DISK_HIGH))
return(1);
else
return(0);
}
/*
* Handle Ubik opcodes to any one of the replicated database services
*/
static void
ubik_print(netdissect_options *ndo,
const u_char *bp)
{
uint32_t ubik_op;
uint32_t temp;
/*
* Print out the afs call we're invoking. The table used here was
* gleaned from ubik/ubik_int.xg
*/
/* Every function that calls this function first makes a bounds check
* for (sizeof(rx_header) + 4) bytes, so long as it remains this way
* the line below will not over-read.
*/
ubik_op = GET_BE_U_4(bp + sizeof(struct rx_header));
ND_PRINT(" ubik call %s", tok2str(ubik_req, "op#%u", ubik_op));
/*
* Decode some of the arguments to the Ubik calls
*/
bp += sizeof(struct rx_header) + 4;
switch (ubik_op) {
case 10000: /* Beacon */
temp = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
ND_PRINT(" syncsite %s", temp ? "yes" : "no");
ND_PRINT(" votestart");
DATEOUT();
ND_PRINT(" dbversion");
UBIK_VERSIONOUT();
ND_PRINT(" tid");
UBIK_VERSIONOUT();
break;
case 10003: /* Get sync site */
ND_PRINT(" site");
UINTOUT();
break;
case 20000: /* Begin */
case 20001: /* Commit */
case 20007: /* Abort */
case 20008: /* Release locks */
case 20010: /* Writev */
ND_PRINT(" tid");
UBIK_VERSIONOUT();
break;
case 20002: /* Lock */
ND_PRINT(" tid");
UBIK_VERSIONOUT();
ND_PRINT(" file");
INTOUT();
ND_PRINT(" pos");
INTOUT();
ND_PRINT(" length");
INTOUT();
temp = GET_BE_U_4(bp);
bp += sizeof(uint32_t);
tok2str(ubik_lock_types, "type %u", temp);
break;
case 20003: /* Write */
ND_PRINT(" tid");
UBIK_VERSIONOUT();
ND_PRINT(" file");
INTOUT();
ND_PRINT(" pos");
INTOUT();
break;
case 20005: /* Get file */
ND_PRINT(" file");
INTOUT();
break;
case 20006: /* Send file */
ND_PRINT(" file");
INTOUT();
ND_PRINT(" length");
INTOUT();
ND_PRINT(" dbversion");
UBIK_VERSIONOUT();
break;
case 20009: /* Truncate */
ND_PRINT(" tid");
UBIK_VERSIONOUT();
ND_PRINT(" file");
INTOUT();
ND_PRINT(" length");
INTOUT();
break;
case 20012: /* Set version */
ND_PRINT(" tid");
UBIK_VERSIONOUT();
ND_PRINT(" oldversion");
UBIK_VERSIONOUT();
ND_PRINT(" newversion");
UBIK_VERSIONOUT();
break;
default:
;
}
return;
trunc:
ND_PRINT(" [|ubik]");
}
/*
* Handle Ubik replies to any one of the replicated database services
*/
static void
ubik_reply_print(netdissect_options *ndo,
const u_char *bp, u_int length, uint32_t opcode)
{
const struct rx_header *rxh;
uint8_t type;
if (length < sizeof(struct rx_header))
return;
rxh = (const struct rx_header *) bp;
/*
* Print out the ubik call we're invoking. This table was gleaned
* from ubik/ubik_int.xg
*/
ND_PRINT(" ubik reply %s", tok2str(ubik_req, "op#%u", opcode));
type = GET_U_1(rxh->type);
bp += sizeof(struct rx_header);
/*
* If it was a data packet, print out the arguments to the Ubik calls
*/
if (type == RX_PACKET_TYPE_DATA)
switch (opcode) {
case 10000: /* Beacon */
ND_PRINT(" vote no");
break;
case 20004: /* Get version */
ND_PRINT(" dbversion");
UBIK_VERSIONOUT();
break;
default:
;
}
/*
* Otherwise, print out "yes" if it was a beacon packet (because
* that's how yes votes are returned, go figure), otherwise
* just print out the error code.
*/
else
switch (opcode) {
case 10000: /* Beacon */
ND_PRINT(" vote yes until");
DATEOUT();
break;
default:
ND_PRINT(" errcode");
INTOUT();
}
return;
trunc:
ND_PRINT(" [|ubik]");
}
/*
* Handle RX ACK packets.
*/
static void
rx_ack_print(netdissect_options *ndo,
const u_char *bp, u_int length)
{
const struct rx_ackPacket *rxa;
uint8_t nAcks;
int i, start, last;
uint32_t firstPacket;
if (length < sizeof(struct rx_header))
return;
bp += sizeof(struct rx_header);
ND_TCHECK_LEN(bp, sizeof(struct rx_ackPacket));
rxa = (const struct rx_ackPacket *) bp;
bp += sizeof(struct rx_ackPacket);
/*
* Print out a few useful things from the ack packet structure
*/
if (ndo->ndo_vflag > 2)
ND_PRINT(" bufspace %u maxskew %u",
GET_BE_U_2(rxa->bufferSpace),
GET_BE_U_2(rxa->maxSkew));
firstPacket = GET_BE_U_4(rxa->firstPacket);
ND_PRINT(" first %u serial %u reason %s",
firstPacket, GET_BE_U_4(rxa->serial),
tok2str(rx_ack_reasons, "#%u", GET_U_1(rxa->reason)));
/*
* Okay, now we print out the ack array. The way _this_ works
* is that we start at "first", and step through the ack array.
* If we have a contiguous range of acks/nacks, try to
* collapse them into a range.
*
* If you're really clever, you might have noticed that this
* doesn't seem quite correct. Specifically, due to structure
* padding, sizeof(struct rx_ackPacket) - RX_MAXACKS won't actually
* yield the start of the ack array (because RX_MAXACKS is 255
* and the structure will likely get padded to a 2 or 4 byte
* boundary). However, this is the way it's implemented inside
* of AFS - the start of the extra fields are at
* sizeof(struct rx_ackPacket) - RX_MAXACKS + nAcks, which _isn't_
* the exact start of the ack array. Sigh. That's why we aren't
* using bp, but instead use rxa->acks[]. But nAcks gets added
* to bp after this, so bp ends up at the right spot. Go figure.
*/
nAcks = GET_U_1(rxa->nAcks);
if (nAcks != 0) {
ND_TCHECK_LEN(bp, nAcks);
/*
* Sigh, this is gross, but it seems to work to collapse
* ranges correctly.
*/
for (i = 0, start = last = -2; i < nAcks; i++)
if (GET_U_1(bp + i) == RX_ACK_TYPE_ACK) {
/*
* I figured this deserved _some_ explanation.
* First, print "acked" and the packet seq
* number if this is the first time we've
* seen an acked packet.
*/
if (last == -2) {
ND_PRINT(" acked %u", firstPacket + i);
start = i;
}
/*
* Otherwise, if there is a skip in
* the range (such as an nacked packet in
* the middle of some acked packets),
* then print the current packet number
* separated from the last number by
* a comma.
*/
else if (last != i - 1) {
ND_PRINT(",%u", firstPacket + i);
start = i;
}
/*
* We always set last to the value of
* the last ack we saw. Conversely, start
* is set to the value of the first ack
* we saw in a range.
*/
last = i;
/*
* Okay, this bit a code gets executed when
* we hit a nack ... in _this_ case we
* want to print out the range of packets
* that were acked, so we need to print
* the _previous_ packet number separated
* from the first by a dash (-). Since we
* already printed the first packet above,
* just print the final packet. Don't
* do this if there will be a single-length
* range.
*/
} else if (last == i - 1 && start != last)
ND_PRINT("-%u", firstPacket + i - 1);
/*
* So, what's going on here? We ran off the end of the
* ack list, and if we got a range we need to finish it up.
* So we need to determine if the last packet in the list
* was an ack (if so, then last will be set to it) and
* we need to see if the last range didn't start with the
* last packet (because if it _did_, then that would mean
* that the packet number has already been printed and
* we don't need to print it again).
*/
if (last == i - 1 && start != last)
ND_PRINT("-%u", firstPacket + i - 1);
/*
* Same as above, just without comments
*/
for (i = 0, start = last = -2; i < nAcks; i++)
if (GET_U_1(bp + i) == RX_ACK_TYPE_NACK) {
if (last == -2) {
ND_PRINT(" nacked %u", firstPacket + i);
start = i;
} else if (last != i - 1) {
ND_PRINT(",%u", firstPacket + i);
start = i;
}
last = i;
} else if (last == i - 1 && start != last)
ND_PRINT("-%u", firstPacket + i - 1);
if (last == i - 1 && start != last)
ND_PRINT("-%u", firstPacket + i - 1);
bp += nAcks;
}
/* Padding. */
bp += 3;
/*
* These are optional fields; depending on your version of AFS,
* you may or may not see them
*/
#define TRUNCRET(n) if (ndo->ndo_snapend - bp + 1 <= n) return;
if (ndo->ndo_vflag > 1) {
TRUNCRET(4);
ND_PRINT(" ifmtu");
UINTOUT();
TRUNCRET(4);
ND_PRINT(" maxmtu");
UINTOUT();
TRUNCRET(4);
ND_PRINT(" rwind");
UINTOUT();
TRUNCRET(4);
ND_PRINT(" maxpackets");
UINTOUT();
}
return;
trunc:
ND_PRINT(" [|ack]");
}
#undef TRUNCRET