c3271d0a76
svn path=/trunk/; revision=3386
570 lines
17 KiB
C
570 lines
17 KiB
C
/* packet-atalk.c
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* Routines for Appletalk packet disassembly (DDP, currently).
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*
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* $Id: packet-atalk.c,v 1.54 2001/04/27 01:27:36 guy Exp $
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*
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* Simon Wilkinson <sxw@dcs.ed.ac.uk>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#include <glib.h>
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#include "packet.h"
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#include "etypes.h"
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#include "ppptypes.h"
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#include "aftypes.h"
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#include "atalk-utils.h"
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static int proto_ddp = -1;
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static int hf_ddp_hopcount = -1;
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static int hf_ddp_len = -1;
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static int hf_ddp_checksum = -1;
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static int hf_ddp_dst_net = -1;
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static int hf_ddp_src_net = -1;
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static int hf_ddp_dst_node = -1;
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static int hf_ddp_src_node = -1;
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static int hf_ddp_dst_socket = -1;
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static int hf_ddp_src_socket = -1;
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static int hf_ddp_type = -1;
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static int proto_nbp = -1;
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static int hf_nbp_op = -1;
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static int hf_nbp_info = -1;
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static int hf_nbp_count = -1;
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static int hf_nbp_tid = -1;
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static int hf_nbp_node_net = -1;
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static int hf_nbp_node_port = -1;
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static int hf_nbp_node_node = -1;
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static int hf_nbp_node_enum = -1;
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static int hf_nbp_node_object = -1;
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static int hf_nbp_node_type = -1;
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static int hf_nbp_node_zone = -1;
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static int proto_rtmp = -1;
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static int hf_rtmp_net = -1;
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static int hf_rtmp_node_len = -1;
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static int hf_rtmp_node = -1;
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static int hf_rtmp_tuple_net = -1;
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static int hf_rtmp_tuple_range_start = -1;
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static int hf_rtmp_tuple_range_end = -1;
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static int hf_rtmp_tuple_dist = -1;
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static int hf_rtmp_function = -1;
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static gint ett_nbp = -1;
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static gint ett_nbp_info = -1;
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static gint ett_nbp_node = -1;
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static gint ett_rtmp = -1;
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static gint ett_rtmp_tuple = -1;
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static gint ett_ddp = -1;
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static gint ett_pstring = -1;
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static dissector_table_t ddp_dissector_table;
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/*
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* P = Padding, H = Hops, L = Len
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*
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* PPHHHHLL LLLLLLLL
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*
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* Assumes the argument is in host byte order.
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*/
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#define ddp_hops(x) ( ( x >> 10) & 0x3C )
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#define ddp_len(x) ( x & 0x03ff )
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typedef struct _e_ddp {
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guint16 hops_len; /* combines pad, hops, and len */
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guint16 sum,dnet,snet;
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guint8 dnode,snode;
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guint8 dport,sport;
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guint8 type;
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} e_ddp;
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#define DDP_HEADER_SIZE 13
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static const value_string op_vals[] = {
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{DDP_RTMPDATA, "AppleTalk Routing Table response or data" },
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{DDP_NBP, "AppleTalk Name Binding Protocol packet"},
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{DDP_ATP, "AppleTalk Transaction Protocol packet"},
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{DDP_AEP, "AppleTalk Echo Protocol packet"},
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{DDP_RTMPREQ, "AppleTalk Routing Table request"},
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{DDP_ZIP, "AppleTalk Zone Information Protocol packet"},
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{DDP_ADSP, "AppleTalk Data Stream Protocol"},
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{DDP_EIGRP, "Cisco EIGRP for AppleTalk"},
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{0, NULL}
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};
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static const value_string rtmp_function_vals[] = {
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{1, "Request"},
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{2, "Route Data Request (split horizon processed)"},
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{3, "Route Data Request (no split horizon processing)"},
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{0, NULL}
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};
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#define NBP_LOOKUP 2
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#define NBP_FORWARD 4
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#define NBP_REPLY 3
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static const value_string nbp_op_vals[] = {
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{NBP_LOOKUP, "lookup"},
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{NBP_FORWARD, "forward request"},
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{NBP_REPLY, "reply"},
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{0, NULL}
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};
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/*
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* XXX - do this with an FT_UINT_STRING?
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* Unfortunately, you can't extract from an FT_UINT_STRING the string,
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* which we'd want to do in order to put it into the "Data:" portion.
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*/
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int dissect_pascal_string(tvbuff_t *tvb, int offset, proto_tree *tree,
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int hf_index)
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{
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int len;
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len = tvb_get_guint8(tvb, offset);
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offset++;
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if ( tree )
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{
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char *tmp;
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proto_tree *item;
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proto_tree *subtree;
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/*
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* XXX - if we could do this inside the protocol tree
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* code, we could perhaps avoid allocating and freeing
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* this string buffer.
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*/
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tmp = g_malloc( len+1 );
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tvb_memcpy(tvb, tmp, offset, len);
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tmp[len] = 0;
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item = proto_tree_add_string(tree, hf_index, tvb, offset-1, len+1, tmp);
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subtree = proto_item_add_subtree(item, ett_pstring);
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proto_tree_add_text(subtree, tvb, offset-1, 1, "Length: %d", len);
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proto_tree_add_text(subtree, tvb, offset, len, "Data: %s", tmp);
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g_free(tmp);
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}
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offset += len;
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return offset;
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}
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static void
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dissect_rtmp_request(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
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proto_tree *rtmp_tree;
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proto_item *ti;
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guint8 function;
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if (check_col(pinfo->fd, COL_PROTOCOL))
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col_set_str(pinfo->fd, COL_PROTOCOL, "RTMP");
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if (check_col(pinfo->fd, COL_INFO))
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col_clear(pinfo->fd, COL_INFO);
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function = tvb_get_guint8(tvb, 0);
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if (check_col(pinfo->fd, COL_INFO))
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col_add_fstr(pinfo->fd, COL_INFO, "%s",
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val_to_str(function, rtmp_function_vals, "Unknown function (%02)"));
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if (tree) {
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ti = proto_tree_add_item(tree, proto_rtmp, tvb, 0, 1, FALSE);
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rtmp_tree = proto_item_add_subtree(ti, ett_rtmp);
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proto_tree_add_uint(rtmp_tree, hf_rtmp_function, tvb, 0, 1, function);
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}
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}
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static void
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dissect_rtmp_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
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proto_tree *rtmp_tree;
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proto_item *ti;
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int offset = 0;
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guint16 net;
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guint8 nodelen,nodelen_bits;
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guint16 node; /* might be more than 8 bits */
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int i;
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if (check_col(pinfo->fd, COL_PROTOCOL))
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col_set_str(pinfo->fd, COL_PROTOCOL, "RTMP");
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if (check_col(pinfo->fd, COL_INFO))
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col_clear(pinfo->fd, COL_INFO);
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net = tvb_get_ntohs(tvb, offset);
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nodelen_bits = tvb_get_guint8(tvb, offset+2);
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if ( nodelen_bits <= 8 ) {
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node = tvb_get_guint8(tvb, offset)+1;
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nodelen = 1;
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} else {
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node = tvb_get_ntohs(tvb, offset);
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nodelen = 2;
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}
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if (check_col(pinfo->fd, COL_INFO))
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col_add_fstr(pinfo->fd, COL_INFO, "Net: %u Node Len: %u Node: %u",
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net, nodelen_bits, node);
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if (tree) {
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ti = proto_tree_add_item(tree, proto_rtmp, tvb, offset,
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tvb_length_remaining(tvb, offset), FALSE);
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rtmp_tree = proto_item_add_subtree(ti, ett_rtmp);
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proto_tree_add_uint(rtmp_tree, hf_rtmp_net, tvb, offset, 2, net);
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proto_tree_add_uint(rtmp_tree, hf_rtmp_node_len, tvb, offset+2, 1,
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nodelen_bits);
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proto_tree_add_uint(rtmp_tree, hf_rtmp_node, tvb, offset+3, nodelen,
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node);
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offset += 3 + nodelen;
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i = 1;
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while (tvb_offset_exists(tvb, offset)) {
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proto_tree *tuple_item, *tuple_tree;
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guint16 tuple_net;
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guint8 tuple_dist;
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guint16 tuple_range_end;
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tuple_net = tvb_get_ntohs(tvb, offset);
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tuple_dist = tvb_get_guint8(tvb, offset+2);
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if (tuple_dist & 0x80) {
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tuple_range_end = tvb_get_ntohs(tvb, offset+3);
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tuple_item = proto_tree_add_text(rtmp_tree, tvb, offset, 6,
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"Tuple %d: Range Start: %u Dist: %u Range End: %u",
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i, tuple_net, tuple_dist&0x7F, tuple_range_end);
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} else {
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tuple_item = proto_tree_add_text(rtmp_tree, tvb, offset, 3,
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"Tuple %d: Net: %u Dist: %u",
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i, tuple_net, tuple_dist);
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}
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tuple_tree = proto_item_add_subtree(tuple_item, ett_rtmp_tuple);
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if (tuple_dist & 0x80) {
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proto_tree_add_uint(tuple_tree, hf_rtmp_tuple_range_start, tvb, offset, 2,
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tuple_net);
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} else {
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proto_tree_add_uint(tuple_tree, hf_rtmp_tuple_net, tvb, offset, 2,
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tuple_net);
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}
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proto_tree_add_uint(tuple_tree, hf_rtmp_tuple_dist, tvb, offset+2, 1,
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tuple_dist & 0x7F);
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if (tuple_dist & 0x80) {
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/*
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* Extended network tuple.
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*/
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proto_tree_add_item(tuple_tree, hf_rtmp_tuple_range_end, tvb, offset+3, 2,
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FALSE);
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offset += 6;
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} else
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offset += 3;
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i++;
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}
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}
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}
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static void
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dissect_nbp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
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proto_tree *nbp_tree;
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proto_tree *nbp_info_tree;
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proto_item *ti, *info_item;
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int offset = 0;
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guint8 info;
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guint op, count;
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unsigned int i;
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if (check_col(pinfo->fd, COL_PROTOCOL))
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col_set_str(pinfo->fd, COL_PROTOCOL, "NBP");
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if (check_col(pinfo->fd, COL_INFO))
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col_clear(pinfo->fd, COL_INFO);
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info = tvb_get_guint8(tvb, offset);
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op = info >> 4;
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count = info & 0x0F;
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if (check_col(pinfo->fd, COL_INFO))
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col_add_fstr(pinfo->fd, COL_INFO, "Op: %s Count: %u",
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val_to_str(op, nbp_op_vals, "Unknown (0x%01x)"), count);
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if (tree) {
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ti = proto_tree_add_item(tree, proto_nbp, tvb, offset,
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tvb_length_remaining(tvb, offset), FALSE);
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nbp_tree = proto_item_add_subtree(ti, ett_nbp);
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info_item = proto_tree_add_uint_format(nbp_tree, hf_nbp_info, tvb, offset, 1,
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info,
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"Info: 0x%01X Operation: %s Count: %u", info,
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val_to_str(op, nbp_op_vals, "Unknown (0x%01X)"),
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count);
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nbp_info_tree = proto_item_add_subtree(info_item, ett_nbp_info);
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proto_tree_add_uint(nbp_info_tree, hf_nbp_op, tvb, offset, 1, info);
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proto_tree_add_uint(nbp_info_tree, hf_nbp_count, tvb, offset, 1, info);
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proto_tree_add_item(nbp_tree, hf_nbp_tid, tvb, offset+1, 1, FALSE);
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offset += 2;
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for (i=0; i<count; i++) {
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proto_tree *node_item,*node_tree;
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int soffset = offset;
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node_item = proto_tree_add_text(nbp_tree, tvb, offset, 4,
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"Node %d", i+1);
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node_tree = proto_item_add_subtree(node_item, ett_nbp_node);
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proto_tree_add_item(node_tree, hf_nbp_node_net, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(node_tree, hf_nbp_node_node, tvb, offset, 1, FALSE);
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offset++;
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proto_tree_add_item(node_tree, hf_nbp_node_port, tvb, offset, 1, FALSE);
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offset++;
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proto_tree_add_item(node_tree, hf_nbp_node_enum, tvb, offset, 1, FALSE);
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offset++;
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offset = dissect_pascal_string(tvb, offset, node_tree, hf_nbp_node_object);
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offset = dissect_pascal_string(tvb, offset, node_tree, hf_nbp_node_type);
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offset = dissect_pascal_string(tvb, offset, node_tree, hf_nbp_node_zone);
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proto_item_set_len(node_item, offset-soffset);
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}
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}
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return;
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}
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static void
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dissect_ddp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
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e_ddp ddp;
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proto_tree *ddp_tree;
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proto_item *ti;
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static struct atalk_ddp_addr src, dst;
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tvbuff_t *new_tvb;
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if (check_col(pinfo->fd, COL_PROTOCOL))
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col_set_str(pinfo->fd, COL_PROTOCOL, "DDP");
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if (check_col(pinfo->fd, COL_INFO))
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col_clear(pinfo->fd, COL_INFO);
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tvb_memcpy(tvb, (guint8 *)&ddp, 0, sizeof(e_ddp));
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ddp.dnet=ntohs(ddp.dnet);
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ddp.snet=ntohs(ddp.snet);
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ddp.sum=ntohs(ddp.sum);
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ddp.hops_len=ntohs(ddp.hops_len);
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src.net = ddp.snet;
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src.node = ddp.snode;
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src.port = ddp.sport;
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dst.net = ddp.dnet;
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dst.node = ddp.dnode;
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dst.port = ddp.dport;
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SET_ADDRESS(&pinfo->net_src, AT_ATALK, sizeof src, (guint8 *)&src);
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SET_ADDRESS(&pinfo->src, AT_ATALK, sizeof src, (guint8 *)&src);
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SET_ADDRESS(&pinfo->net_dst, AT_ATALK, sizeof dst, (guint8 *)&dst);
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SET_ADDRESS(&pinfo->dst, AT_ATALK, sizeof dst, (guint8 *)&dst);
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if (check_col(pinfo->fd, COL_INFO))
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col_add_str(pinfo->fd, COL_INFO,
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val_to_str(ddp.type, op_vals, "Unknown DDP protocol (%02x)"));
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if (tree) {
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ti = proto_tree_add_item(tree, proto_ddp, tvb, 0, DDP_HEADER_SIZE,
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FALSE);
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ddp_tree = proto_item_add_subtree(ti, ett_ddp);
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proto_tree_add_uint(ddp_tree, hf_ddp_hopcount, tvb, 0, 1,
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ddp_hops(ddp.hops_len));
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proto_tree_add_uint(ddp_tree, hf_ddp_len, tvb, 0, 2,
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ddp_len(ddp.hops_len));
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proto_tree_add_uint(ddp_tree, hf_ddp_checksum, tvb, 2, 2,
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ddp.sum);
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proto_tree_add_uint(ddp_tree, hf_ddp_dst_net, tvb, 4, 2,
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ddp.dnet);
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proto_tree_add_uint(ddp_tree, hf_ddp_src_net, tvb, 6, 2,
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ddp.snet);
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proto_tree_add_uint(ddp_tree, hf_ddp_dst_node, tvb, 8, 1,
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ddp.dnode);
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proto_tree_add_uint(ddp_tree, hf_ddp_src_node, tvb, 9, 1,
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ddp.snode);
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proto_tree_add_uint(ddp_tree, hf_ddp_dst_socket, tvb, 10, 1,
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ddp.dport);
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proto_tree_add_uint(ddp_tree, hf_ddp_src_socket, tvb, 11, 1,
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ddp.sport);
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proto_tree_add_uint(ddp_tree, hf_ddp_type, tvb, 12, 1,
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ddp.type);
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}
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new_tvb = tvb_new_subset(tvb, DDP_HEADER_SIZE, -1, -1);
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if (!dissector_try_port(ddp_dissector_table, ddp.type, new_tvb, pinfo, tree))
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dissect_data(new_tvb, 0, pinfo, tree);
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}
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void
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proto_register_atalk(void)
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{
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static hf_register_info hf_ddp[] = {
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{ &hf_ddp_hopcount,
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{ "Hop count", "ddp.hopcount", FT_UINT8, BASE_DEC, NULL, 0x0,
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"" }},
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{ &hf_ddp_len,
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{ "Datagram length", "ddp.len", FT_UINT16, BASE_DEC, NULL, 0x0,
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"" }},
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{ &hf_ddp_checksum,
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{ "Checksum", "ddp.checksum", FT_UINT16, BASE_DEC, NULL, 0x0,
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"" }},
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|
{ &hf_ddp_dst_net,
|
|
{ "Destination Net", "ddp.dst.net", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_ddp_src_net,
|
|
{ "Source Net", "ddp.src.net", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_ddp_dst_node,
|
|
{ "Destination Node", "ddp.dst.node", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_ddp_src_node,
|
|
{ "Source Node", "ddp.src.node", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_ddp_dst_socket,
|
|
{ "Destination Socket", "ddp.dst.socket", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_ddp_src_socket,
|
|
{ "Source Socket", "ddp.src.socket", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_ddp_type,
|
|
{ "Protocol type", "ddp.type", FT_UINT8, BASE_DEC, VALS(op_vals), 0x0,
|
|
"" }},
|
|
};
|
|
|
|
static hf_register_info hf_nbp[] = {
|
|
{ &hf_nbp_op,
|
|
{ "Operation", "nbp.op", FT_UINT8, BASE_DEC,
|
|
VALS(nbp_op_vals), 0xF0, "Operation" }},
|
|
{ &hf_nbp_info,
|
|
{ "Info", "nbp.info", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, "Info" }},
|
|
{ &hf_nbp_count,
|
|
{ "Count", "nbp.count", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0F, "Count" }},
|
|
{ &hf_nbp_node_net,
|
|
{ "Network", "nbp.net", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "Network" }},
|
|
{ &hf_nbp_node_node,
|
|
{ "Node", "nbp.node", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "Node" }},
|
|
{ &hf_nbp_node_port,
|
|
{ "Port", "nbp.port", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "Port" }},
|
|
{ &hf_nbp_node_enum,
|
|
{ "Enumerator", "nbp.enum", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "Enumerator" }},
|
|
{ &hf_nbp_node_object,
|
|
{ "Object", "nbp.object", FT_STRING, BASE_DEC,
|
|
NULL, 0x0, "Object" }},
|
|
{ &hf_nbp_node_type,
|
|
{ "Type", "nbp.type", FT_STRING, BASE_DEC,
|
|
NULL, 0x0, "Type" }},
|
|
{ &hf_nbp_node_zone,
|
|
{ "Zone", "nbp.zone", FT_STRING, BASE_DEC,
|
|
NULL, 0x0, "Zone" }},
|
|
{ &hf_nbp_tid,
|
|
{ "Transaction ID", "nbp.tid", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "Transaction ID" }}
|
|
};
|
|
|
|
static hf_register_info hf_rtmp[] = {
|
|
{ &hf_rtmp_net,
|
|
{ "Net", "rtmp.net", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "Net" }},
|
|
{ &hf_rtmp_node,
|
|
{ "Node", "nbp.nodeid", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "Node" }},
|
|
{ &hf_rtmp_node_len,
|
|
{ "Node Length", "nbp.nodeid.length", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "Node Length" }},
|
|
{ &hf_rtmp_tuple_net,
|
|
{ "Net", "rtmp.tuple.net", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "Net" }},
|
|
{ &hf_rtmp_tuple_range_start,
|
|
{ "Range Start", "rtmp.tuple.range_start", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "Range Start" }},
|
|
{ &hf_rtmp_tuple_range_end,
|
|
{ "Range End", "rtmp.tuple.range_end", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "Range End" }},
|
|
{ &hf_rtmp_tuple_dist,
|
|
{ "Distance", "rtmp.tuple.dist", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "Distance" }},
|
|
{ &hf_rtmp_function,
|
|
{ "Function", "rtmp.function", FT_UINT8, BASE_DEC,
|
|
VALS(rtmp_function_vals), 0x0, "Request Function" }}
|
|
};
|
|
|
|
|
|
static gint *ett[] = {
|
|
&ett_ddp,
|
|
&ett_nbp,
|
|
&ett_nbp_info,
|
|
&ett_nbp_node,
|
|
&ett_pstring,
|
|
&ett_rtmp,
|
|
&ett_rtmp_tuple
|
|
};
|
|
|
|
proto_ddp = proto_register_protocol("Datagram Delivery Protocol", "DDP", "ddp");
|
|
proto_register_field_array(proto_ddp, hf_ddp, array_length(hf_ddp));
|
|
|
|
proto_nbp = proto_register_protocol("Name Binding Protocol", "NBP", "nbp");
|
|
proto_register_field_array(proto_nbp, hf_nbp, array_length(hf_nbp));
|
|
|
|
proto_rtmp = proto_register_protocol("Routing Table Maintenance Protocol",
|
|
"RTMP", "rtmp");
|
|
proto_register_field_array(proto_rtmp, hf_rtmp, array_length(hf_rtmp));
|
|
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
/* subdissector code */
|
|
ddp_dissector_table = register_dissector_table("ddp.type");
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_atalk(void)
|
|
{
|
|
dissector_add("ethertype", ETHERTYPE_ATALK, dissect_ddp, proto_ddp);
|
|
dissector_add("chdlctype", ETHERTYPE_ATALK, dissect_ddp, proto_ddp);
|
|
dissector_add("ppp.protocol", PPP_AT, dissect_ddp, proto_ddp);
|
|
dissector_add("null.type", BSD_AF_APPLETALK, dissect_ddp, proto_ddp);
|
|
dissector_add("ddp.type", DDP_NBP, dissect_nbp, proto_nbp);
|
|
dissector_add("ddp.type", DDP_RTMPREQ, dissect_rtmp_request, proto_rtmp);
|
|
dissector_add("ddp.type", DDP_RTMPDATA, dissect_rtmp_data, proto_rtmp);
|
|
}
|