/* When seeing a broadcast talking about an open TCP port on a host, create
* a conversation to dissect anything sent/received at that address. Setup
* protocol data so the TCP dissection knows what broadcast triggered it. */
static void
prepare_ldss_transfer_conv(ldss_broadcast_t *broadcast)
{
conversation_t *transfer_conv;
ldss_transfer_info_t *transfer_info;
transfer_info = se_new0(ldss_transfer_info_t);
transfer_info->broadcast = broadcast;
/* Preparation for later push/pull dissection */
transfer_conv = conversation_new (broadcast->num, &broadcast->broadcaster->addr, &broadcast->broadcaster->addr,
PT_TCP, broadcast->broadcaster->port, broadcast->broadcaster->port, NO_ADDR2|NO_PORT2);
conversation_add_proto_data(transfer_conv, proto_ldss, transfer_info);
conversation_set_dissector(transfer_conv, ldss_handle);
}
static spx_hash_value*
spx_hash_insert(conversation_t *conversation, guint32 spx_src, guint16 spx_seq)
{
spx_hash_key *key;
spx_hash_value *value;
/* Now remember the packet, so we can find it if we later. */
key = se_new(spx_hash_key);
key->conversation = conversation;
key->spx_src = spx_src;
key->spx_seq = spx_seq;
value = se_new0(spx_hash_value);
g_hash_table_insert(spx_hash, key, value);
return value;
}
/* Transfers happen in response to broadcasts, they are always TCP and are
* used to send the file to the port mentioned in the broadcast. There are
* 2 types of transfers: Pushes, which are direct responses to searches,
* in which the peer that has the file connects to the peer that doesnt and
* sends it, then disconnects. The other type of transfer is a pull, where
* the peer that doesn't have the file connects to the peer that does and
* requests it be sent.
*
* Pulls have a file request which identifies the desired file,
* while pushes simply send the file. In practice this works because every
* file the implementation sends searches for is on a different TCP port
* on the searcher's machine. */
static int
dissect_ldss_transfer (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
conversation_t *transfer_conv;
ldss_transfer_info_t *transfer_info;
struct tcpinfo *transfer_tcpinfo;
proto_tree *ti, *line_tree = NULL, *ldss_tree = NULL;
nstime_t broadcast_response_time;
/* Look for the transfer conversation; this was created during
* earlier broadcast dissection (see prepate_ldss_transfer_conv) */
transfer_conv = find_conversation (pinfo->fd->num, &pinfo->src, &pinfo->dst,
PT_TCP, pinfo->srcport, pinfo->destport, 0);
transfer_info = (ldss_transfer_info_t *)conversation_get_proto_data(transfer_conv, proto_ldss);
transfer_tcpinfo = (struct tcpinfo *)pinfo->private_data;
/* For a pull, the first packet in the TCP connection is the file request.
* First packet is identified by relative seq/ack numbers of 1.
* File request only appears on a pull (triggered by an offer - see above
* about broadcasts) */
if (transfer_tcpinfo->seq == 1 &&
transfer_tcpinfo->lastackseq == 1 &&
transfer_info->broadcast->message_id == MESSAGE_ID_WILLSEND) {
/* LDSS pull transfers look a lot like HTTP.
* Sample request:
* md5:01234567890123...
* Size: 2550
* Start: 0
* Compression: 0
* (remote end sends the file identified by the digest) */
guint offset = 0;
gboolean already_dissected = TRUE;
col_set_str(pinfo->cinfo, COL_INFO, "LDSS File Transfer (Requesting file - pull)");
if (highest_num_seen == 0 ||
highest_num_seen < pinfo->fd->num) {
already_dissected = FALSE;
transfer_info->req = se_new0(ldss_file_request_t);
transfer_info->req->file = se_new0(ldss_file_t);
highest_num_seen = pinfo->fd->num;
}
if (tree) {
ti = proto_tree_add_item(tree, proto_ldss,
tvb, 0, tvb_reported_length(tvb), ENC_NA);
ldss_tree = proto_item_add_subtree(ti, ett_ldss_transfer);
}
/* Populate digest data into the file struct in the request */
transfer_info->file = transfer_info->req->file;
/* Grab each line from the packet, there should be 4 but lets
* not walk off the end looking for more. */
while (offset < tvb_reported_length(tvb)) {
gint next_offset;
const guint8 *line;
int linelen;
gboolean is_digest_line;
guint digest_type_len;
linelen = tvb_find_line_end(tvb, offset,
tvb_ensure_length_remaining(tvb, offset), &next_offset,
FALSE);
/* Include new-line in line */
line = (guint8 *)tvb_memdup(tvb, offset, linelen+1); /* XXX - memory leak? */
if (tree) {
ti = proto_tree_add_text(ldss_tree, tvb, offset, linelen,
"%s",
tvb_format_text(tvb, offset, next_offset-offset));
line_tree = proto_item_add_subtree(ti, ett_ldss_transfer_req);
}
/* Reduce code duplication processing digest lines.
* There are too many locals to pass to a function - the signature
* looked pretty ugly when I tried! */
is_digest_line = FALSE;
if (strncmp(line,"md5:",4)==0) {
is_digest_line = TRUE;
digest_type_len = 4;
transfer_info->file->digest_type = DIGEST_TYPE_MD5;
}
else if (strncmp(line, "sha1:", 5)==0) {
is_digest_line = TRUE;
digest_type_len = 5;
transfer_info->file->digest_type = DIGEST_TYPE_SHA1;
}
else if (strncmp(line, "sha256:", 7)==0) {
is_digest_line = TRUE;
digest_type_len = 7;
transfer_info->file->digest_type = DIGEST_TYPE_SHA256;
}
else if (strncmp(line, "unknown:", 8)==0) {
is_digest_line = TRUE;
digest_type_len = 8;
transfer_info->file->digest_type = DIGEST_TYPE_UNKNOWN;
}
else if (strncmp(line, "Size: ", 6)==0) {
/* Sample size line:
* Size: 2550\n */
transfer_info->req->size = g_ascii_strtoull(line+6, NULL, 10);
if (tree) {
ti = proto_tree_add_uint64(line_tree, hf_ldss_size,
tvb, offset+6, linelen-6, transfer_info->req->size);
PROTO_ITEM_SET_GENERATED(ti);
}
}
else if (strncmp(line, "Start: ", 7)==0) {
/* Sample offset line:
* Start: 0\n */
transfer_info->req->offset = g_ascii_strtoull(line+7, NULL, 10);
if (tree) {
ti = proto_tree_add_uint64(line_tree, hf_ldss_offset,
tvb, offset+7, linelen-7, transfer_info->req->offset);
PROTO_ITEM_SET_GENERATED(ti);
}
}
else if (strncmp(line, "Compression: ", 13)==0) {
/* Sample compression line:
* Compression: 0\n */
transfer_info->req->compression = (gint8)strtol(line+13, NULL, 10); /* XXX - bad cast */
if (tree) {
ti = proto_tree_add_uint(line_tree, hf_ldss_compression,
tvb, offset+13, linelen-13, transfer_info->req->compression);
PROTO_ITEM_SET_GENERATED(ti);
}
}
else {
if (tree) {
ti = proto_tree_add_text(line_tree, tvb, offset, linelen,
"Unrecognized line ignored");
PROTO_ITEM_SET_GENERATED(ti);
}
}
if (is_digest_line) {
/* Sample digest-type/digest line:
* md5:0123456789ABCDEF\n */
if (!already_dissected) {
GByteArray *digest_bytes;
digest_bytes = g_byte_array_new();
hex_str_to_bytes(
tvb_get_ptr(tvb, offset+digest_type_len, linelen-digest_type_len),
digest_bytes, FALSE);
if(digest_bytes->len >= DIGEST_LEN)
digest_bytes->len = (DIGEST_LEN-1);
/* Ensure the digest is zero-padded */
transfer_info->file->digest = (guint8 *)se_alloc0(DIGEST_LEN);
memcpy(transfer_info->file->digest, digest_bytes->data, digest_bytes->len);
g_byte_array_free(digest_bytes, TRUE);
}
if (tree) {
proto_item *tii = NULL;
tii = proto_tree_add_uint(line_tree, hf_ldss_digest_type,
tvb, offset, digest_type_len, transfer_info->file->digest_type);
PROTO_ITEM_SET_GENERATED(tii);
tii = proto_tree_add_bytes(line_tree, hf_ldss_digest,
tvb, offset+digest_type_len, linelen-digest_type_len,
transfer_info->file->digest);
PROTO_ITEM_SET_GENERATED(tii);
}
}
offset = next_offset;
}
/* Link forwards to the response for this pull. */
if (tree && transfer_info->resp_num != 0) {
ti = proto_tree_add_uint(ldss_tree, hf_ldss_response_in,
tvb, 0, 0, transfer_info->resp_num);
PROTO_ITEM_SET_GENERATED(ti);
}
transfer_info->req->num = pinfo->fd->num;
transfer_info->req->ts = pinfo->fd->abs_ts;
}
/* Remaining packets are the file response */
else {
guint64 size;
guint64 offset;
guint8 compression;
/* size, digest, compression come from the file request for a pull but
* they come from the broadcast for a push. Pushes don't bother
* with a file request - they just send the data. We have to get file
* info from the offer broadcast which triggered this transfer.
* If we cannot find the file request, default to the broadcast. */
if (transfer_info->broadcast->message_id == MESSAGE_ID_WILLSEND &&
transfer_info->req != NULL) {
transfer_info->file = transfer_info->req->file;
size = transfer_info->req->size;
offset = transfer_info->req->offset;
compression = transfer_info->req->compression;
}
else {
transfer_info->file = transfer_info->broadcast->file;
size = transfer_info->broadcast->size;
offset = transfer_info->broadcast->offset;
compression = transfer_info->broadcast->compression;
}
/* Remaining data in this TCP connection is all file data.
* Always desegment if the size is 0 (ie. unknown)
*/
if (pinfo->can_desegment) {
if (size == 0 || tvb_length(tvb) < size) {
pinfo->desegment_offset = 0;
pinfo->desegment_len = DESEGMENT_UNTIL_FIN;
return 0;
}
}
/* OK. Now we have the whole file that was transferred. */
transfer_info->resp_num = pinfo->fd->num;
transfer_info->resp_ts = pinfo->fd->abs_ts;
col_add_fstr(pinfo->cinfo, COL_INFO, "LDSS File Transfer (Sending file - %s)",
transfer_info->broadcast->message_id == MESSAGE_ID_WILLSEND
? "pull"
: "push");
if (tree) {
ti = proto_tree_add_item(tree, proto_ldss,
tvb, 0, tvb_reported_length(tvb), ENC_NA);
ldss_tree = proto_item_add_subtree(ti, ett_ldss_transfer);
proto_tree_add_bytes_format(ldss_tree, hf_ldss_file_data,
tvb, 0, tvb_length(tvb), NULL,
compression == COMPRESSION_GZIP
? "Gzip compressed data: %d bytes"
: "File data: %d bytes",
tvb_length(tvb));
#ifdef HAVE_LIBZ
/* Be nice and uncompress the file data. */
if (compression == COMPRESSION_GZIP) {
tvbuff_t *uncomp_tvb;
uncomp_tvb = tvb_child_uncompress(tvb, tvb, 0, tvb_length(tvb));
if (uncomp_tvb != NULL) {
/* XXX: Maybe not a good idea to add a data_source for
what may very well be a large buffer since then
the full uncompressed buffer will be shown in a tab
in the hex bytes pane ?
However, if we don't, bytes in an unrelated tab will
be highlighted.
*/
add_new_data_source(pinfo, uncomp_tvb, "Uncompressed Data");
proto_tree_add_bytes_format_value(ldss_tree, hf_ldss_file_data,
uncomp_tvb, 0, tvb_length(uncomp_tvb),
NULL, "Uncompressed data: %d bytes",
tvb_length(uncomp_tvb));
}
}
#endif
ti = proto_tree_add_uint(ldss_tree, hf_ldss_digest_type,
tvb, 0, 0, transfer_info->file->digest_type);
PROTO_ITEM_SET_GENERATED(ti);
if (transfer_info->file->digest != NULL) {
/* This is ugly. You can't add bytes of nonzero length and have
* filtering work correctly unless you give a valid location in
* the packet. This hack pretends the first 32 bytes of the packet
* are the digest, which they aren't: they're actually the first 32
* bytes of the file that was sent. */
ti = proto_tree_add_bytes(ldss_tree, hf_ldss_digest,
tvb, 0, DIGEST_LEN, transfer_info->file->digest);
}
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint64(ldss_tree, hf_ldss_size,
tvb, 0, 0, size);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint64(ldss_tree, hf_ldss_offset,
tvb, 0, 0, offset);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(ldss_tree, hf_ldss_compression,
tvb, 0, 0, compression);
PROTO_ITEM_SET_GENERATED(ti);
/* Link to the request for a pull. */
if (transfer_info->broadcast->message_id == MESSAGE_ID_WILLSEND &&
transfer_info->req != NULL &&
transfer_info->req->num != 0) {
ti = proto_tree_add_uint(ldss_tree, hf_ldss_response_to,
tvb, 0, 0, transfer_info->req->num);
PROTO_ITEM_SET_GENERATED(ti);
}
}
}
/* Print the pull response time */
if (transfer_info->broadcast->message_id == MESSAGE_ID_WILLSEND &&
transfer_info->req != NULL &&
transfer_info->resp_num != 0) {
nstime_t pull_response_time;
nstime_delta(&pull_response_time, &transfer_info->resp_ts,
&transfer_info->req->ts);
ti = proto_tree_add_time(ldss_tree, hf_ldss_transfer_response_time,
tvb, 0, 0, &pull_response_time);
PROTO_ITEM_SET_GENERATED(ti);
}
/* Link the transfer back to the initiating broadcast. Response time is
* calculated as the time from broadcast to completed transfer. */
ti = proto_tree_add_uint(ldss_tree, hf_ldss_initiated_by,
tvb, 0, 0, transfer_info->broadcast->num);
PROTO_ITEM_SET_GENERATED(ti);
if (transfer_info->resp_num != 0) {
nstime_delta(&broadcast_response_time, &transfer_info->resp_ts,
&transfer_info->broadcast->ts);
ti = proto_tree_add_time(ldss_tree, hf_ldss_transfer_completed_in,
tvb, 0, 0, &broadcast_response_time);
PROTO_ITEM_SET_GENERATED(ti);
}
/* This conv got its addr2/port2 set by the TCP dissector because a TCP
* connection was established. Make a new one to handle future connections
* to the addr/port mentioned in the broadcast, because that socket is
* still open. */
if (transfer_tcpinfo->seq == 1 &&
transfer_tcpinfo->lastackseq == 1) {
prepare_ldss_transfer_conv(transfer_info->broadcast);
}
return tvb_length(tvb);
}
/* Broadcasts are searches, offers or promises.
*
* Searches are sent by
* a peer when it needs a file (ie. while applying its policy, when it needs
* files such as installers to install software.)
*
* Each broadcast relates to one file and each file is identified only by its
* checksum - no file names are ever used. A search times out after 10 seconds
* (configurable) and the peer will then attempt to act on any offers by
* downloading (via push or pull - see dissect_ldss_transfer) from those peers.
*
* If no offers are received, the search fails and the peer fetches the file
* from a remote server, generally a HTTP server on the other side of a WAN.
* The protocol exists to minimize the number of WAN downloads needed.
*
* While downloading from WAN the peer sends promises to inform other peers
* when it will be available for them to download. This prevents multiple peers
* simultaneously downloading the same file. Promises also inform other peers
* how much download bandwidth is being used by their download. Other peers use
* this information and the configured knowledge of the WAN bandwidth to avoid
* saturating the WAN link, as file downloads are a non-time-critical and
* non-business-critical network function. LDSS is intended for networks of
* 5-20 machines connected by slow WAN link. The current implementation of the
* protocol allows administrator to configure "time windows" when WAN usage is
* throttled/unthrottled, though this isn't visible in LDSS.
*
* Once a WAN download or a LAN transfer (see below above dissect_ldss_transfer)
* has complete the peer will offer the file to other peers on the LAN so they
* don't need to download it themselves.
*
* Peers also notify when they shut down in case any other peer is waiting for
* a file. */
static int
dissect_ldss_broadcast(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint16 messageID;
guint8 digest_type;
guint8 compression;
guint32 cookie;
guint8 *digest;
guint64 size;
guint64 offset;
guint32 targetTime;
guint16 port;
guint16 rate;
guint16 messageDetail = INFERRED_NONE;
proto_tree *ti, *ldss_tree;
const gchar *packet_type, *packet_detail;
messageID = tvb_get_ntohs (tvb, 0);
digest_type = tvb_get_guint8 (tvb, 2);
compression = tvb_get_guint8 (tvb, 3);
cookie = tvb_get_ntohl (tvb, 4);
digest = (guint8 *)tvb_memdup (tvb, 8, DIGEST_LEN);
size = tvb_get_ntoh64 (tvb, 40);
offset = tvb_get_ntoh64 (tvb, 48);
targetTime = tvb_get_ntohl (tvb, 56);
port = tvb_get_ntohs (tvb, 64);
rate = tvb_get_ntohs (tvb, 66);
packet_type = val_to_str_const(messageID, ldss_message_id_value, "unknown");
if (messageID == MESSAGE_ID_WILLSEND) {
if (cookie == 0) {
/* Shutdown: Dishonor promises from this peer. Current
* implementation abuses WillSend for this. */
messageDetail = INFERRED_PEERSHUTDOWN;
}
else if (size == 0 && offset == 0) {
/* NeedFile search failed - going to WAN */
messageDetail = INFERRED_WANDOWNLOAD;
}
else if (size > 0) {
/* Size is known (not always the case) */
if (size == offset) {
/* File is available for pull on this peer's TCP port */
messageDetail = INFERRED_OFFER;
}
else {
/* WAN download progress announcement from this peer */
messageDetail = INFERRED_PROMISE;
}
}
}
else if (messageID == MESSAGE_ID_NEEDFILE) {
messageDetail = INFERRED_SEARCH;
}
packet_detail = val_to_str_const(messageDetail, ldss_inferred_info, "unknown");
/* Set the info column */
col_add_fstr(pinfo->cinfo, COL_INFO, "LDSS Broadcast (%s%s)",
packet_type,
packet_detail);
/* If we have a non-null tree (ie we are building the proto_tree
* instead of just filling out the columns), then give more detail. */
if (tree) {
ti = proto_tree_add_item(tree, proto_ldss,
tvb, 0, (tvb_length(tvb) > 72) ? tvb_length(tvb) : 72, ENC_NA);
ldss_tree = proto_item_add_subtree(ti, ett_ldss_broadcast);
proto_tree_add_item(ldss_tree, hf_ldss_message_id,
tvb, 0, 2, ENC_BIG_ENDIAN);
ti = proto_tree_add_uint(ldss_tree, hf_ldss_message_detail,
tvb, 0, 0, messageDetail);
PROTO_ITEM_SET_GENERATED(ti);
proto_tree_add_item(ldss_tree, hf_ldss_digest_type,
tvb, 2, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ldss_tree, hf_ldss_compression,
tvb, 3, 1, ENC_BIG_ENDIAN);
proto_tree_add_uint_format_value(ldss_tree, hf_ldss_cookie,
tvb, 4, 4, FALSE,
"0x%x%s",
cookie,
(cookie == 0)
? " - shutdown (promises from this peer are no longer valid)"
: "");
proto_tree_add_item(ldss_tree, hf_ldss_digest,
tvb, 8, DIGEST_LEN, ENC_NA);
proto_tree_add_item(ldss_tree, hf_ldss_size,
tvb, 40, 8, ENC_BIG_ENDIAN);
proto_tree_add_item(ldss_tree, hf_ldss_offset,
tvb, 48, 8, ENC_BIG_ENDIAN);
proto_tree_add_uint_format_value(ldss_tree, hf_ldss_target_time,
tvb, 56, 4, FALSE,
"%d:%02d:%02d",
(int)(targetTime / 3600),
(int)((targetTime / 60) % 60),
(int)(targetTime % 60));
proto_tree_add_item(ldss_tree, hf_ldss_reserved_1,
tvb, 60, 4, ENC_BIG_ENDIAN);
proto_tree_add_uint_format_value(ldss_tree, hf_ldss_port,
tvb, 64, 2, FALSE,
"%d%s",
port,
(messageID == MESSAGE_ID_WILLSEND &&
size > 0 &&
size == offset)
? " - file can be pulled at this TCP port"
: (messageID == MESSAGE_ID_NEEDFILE
? " - file can be pushed to this TCP port"
: ""));
proto_tree_add_uint_format_value(ldss_tree, hf_ldss_rate,
tvb, 66, 2, FALSE,
"%ld",
(rate > 0)
? (long)floor(exp(rate * G_LN2 / 2048))
: 0);
proto_tree_add_item(ldss_tree, hf_ldss_priority,
tvb, 68, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(ldss_tree, hf_ldss_property_count,
tvb, 70, 2, ENC_BIG_ENDIAN);
if (tvb_length(tvb) > 72) {
proto_tree_add_item(ldss_tree, hf_ldss_properties,
tvb, 72, tvb_length(tvb) - 72, ENC_NA);
}
}
/* Finally, store the broadcast and register ourselves to dissect
* any pushes or pulls that result from this broadcast. All data
* is pushed/pulled over TCP using the port from the broadcast
* packet's port field.
* Track each by a TCP conversation with the remote end wildcarded.
* The TCP conv tracks back to a broadcast conv to determine what it
* is in response to.
*
* These steps only need to be done once per packet, so a variable
* tracks the highest frame number seen. Handles the case of first frame
* being frame zero. */
if (messageDetail != INFERRED_PEERSHUTDOWN &&
(highest_num_seen == 0 ||
highest_num_seen < pinfo->fd->num)) {
ldss_broadcast_t *data;
/* Populate data from the broadcast */
data = se_new0(ldss_broadcast_t);
data->num = pinfo->fd->num;
data->ts = pinfo->fd->abs_ts;
data->message_id = messageID;
data->message_detail = messageDetail;
data->port = port;
data->size = size;
data->offset = offset;
data->compression = compression;
data->file = se_new0(ldss_file_t);
data->file->digest = digest;
data->file->digest_type = digest_type;
data->broadcaster = se_new0(ldss_broadcaster_t);
COPY_ADDRESS(&data->broadcaster->addr, &pinfo->src);
data->broadcaster->port = port;
/* Dissect any future pushes/pulls */
if (port > 0) {
prepare_ldss_transfer_conv(data);
}
/* Record that the frame was processed */
highest_num_seen = pinfo->fd->num;
}
return tvb_length(tvb);
}
static void
dissect_k12(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree)
{
static dissector_handle_t data_handles[] = {NULL,NULL};
proto_item* k12_item;
proto_tree* k12_tree;
proto_item* stack_item;
dissector_handle_t sub_handle = NULL;
dissector_handle_t* handles;
guint i;
k12_item = proto_tree_add_protocol_format(tree, proto_k12, tvb, 0, 0,
"Packet from: '%s' (0x%.8x)",
pinfo->pseudo_header->k12.input_name,
pinfo->pseudo_header->k12.input);
k12_tree = proto_item_add_subtree(k12_item, ett_k12);
proto_tree_add_uint(k12_tree, hf_k12_port_id, tvb, 0,0,pinfo->pseudo_header->k12.input);
proto_tree_add_string(k12_tree, hf_k12_port_name, tvb, 0,0,pinfo->pseudo_header->k12.input_name);
stack_item = proto_tree_add_string(k12_tree, hf_k12_stack_file, tvb, 0,0,pinfo->pseudo_header->k12.stack_file);
k12_item = proto_tree_add_uint(k12_tree, hf_k12_port_type, tvb, 0, 0,
pinfo->pseudo_header->k12.input_type);
k12_tree = proto_item_add_subtree(k12_item, ett_port);
switch ( pinfo->pseudo_header->k12.input_type ) {
case K12_PORT_DS0S:
proto_tree_add_uint(k12_tree, hf_k12_ts, tvb, 0,0,pinfo->pseudo_header->k12.input_info.ds0mask);
break;
case K12_PORT_ATMPVC:
{
gchar* circuit_str = ep_strdup_printf("%u:%u:%u",
(guint)pinfo->pseudo_header->k12.input_info.atm.vp,
(guint)pinfo->pseudo_header->k12.input_info.atm.vc,
(guint)pinfo->pseudo_header->k12.input_info.atm.cid);
/*
* XXX: this is prone to collisions!
* we need an uniform way to manage circuits between dissectors
*/
pinfo->circuit_id = g_str_hash(circuit_str);
proto_tree_add_uint(k12_tree, hf_k12_atm_vp, tvb, 0, 0,
pinfo->pseudo_header->k12.input_info.atm.vp);
proto_tree_add_uint(k12_tree, hf_k12_atm_vc, tvb, 0, 0,
pinfo->pseudo_header->k12.input_info.atm.vc);
if (pinfo->pseudo_header->k12.input_info.atm.cid)
proto_tree_add_uint(k12_tree, hf_k12_atm_cid, tvb, 0, 0,
pinfo->pseudo_header->k12.input_info.atm.cid);
break;
}
default:
break;
}
handles = (dissector_handle_t *)se_tree_lookup32(port_handles, pinfo->pseudo_header->k12.input);
if (! handles ) {
for (i=0 ; i < nk12_handles; i++) {
if ( epan_strcasestr(pinfo->pseudo_header->k12.stack_file, k12_handles[i].match)
|| epan_strcasestr(pinfo->pseudo_header->k12.input_name, k12_handles[i].match) ) {
handles = k12_handles[i].handles;
break;
}
}
if (!handles) {
data_handles[0] = data_handle;
handles = data_handles;
}
se_tree_insert32(port_handles, pinfo->pseudo_header->k12.input, handles);
}
if (handles == data_handles) {
proto_tree* stack_tree = proto_item_add_subtree(stack_item,ett_stack_item);
proto_item* item;
item = proto_tree_add_text(stack_tree,tvb,0,0,
"Warning: stk file not matched in the 'K12 Protocols' table");
PROTO_ITEM_SET_GENERATED(item);
expert_add_info_format(pinfo, item, PI_UNDECODED, PI_WARN, "unmatched stk file");
item = proto_tree_add_text(stack_tree,tvb,0,0,
"Info: You can edit the 'K12 Protocols' table from Preferences->Protocols->k12xx");
PROTO_ITEM_SET_GENERATED(item);
call_dissector(data_handle, tvb, pinfo, tree);
return;
}
/* Setup subdissector information */
for (i = 0; handles[i] && handles[i+1]; ++i) {
if (handles[i] == sscop_handle) {
sscop_payload_info *p_sscop_info = (sscop_payload_info *)p_get_proto_data(pinfo->fd, proto_sscop);
if (!p_sscop_info) {
p_sscop_info = se_new0(sscop_payload_info);
p_add_proto_data(pinfo->fd, proto_sscop, p_sscop_info);
p_sscop_info->subdissector = handles[i+1];
}
}
/* Add more protocols here */
}
sub_handle = handles[0];
/* Setup information required by certain protocols */
if (sub_handle == fp_handle) {
fp_info *p_fp_info = (fp_info *)p_get_proto_data(pinfo->fd, proto_fp);
if (!p_fp_info) {
p_fp_info = se_new0(fp_info);
p_add_proto_data(pinfo->fd, proto_fp, p_fp_info);
fill_fp_info(p_fp_info,
pinfo->pseudo_header->k12.extra_info,
pinfo->pseudo_header->k12.extra_length);
}
}
call_dissector(sub_handle, tvb, pinfo, tree);
}
