forked from osmocom/wireshark
![Laurent Deniel](/assets/img/avatar_default.png)
the following: It is now possible to enable/disable a particular protocol decoding (i.e. the protocol dissector is void or not). When a protocol is disabled, it is displayed as Data and of course, all linked sub-protocols are disabled as well. Disabling a protocol could be interesting: - in case of buggy dissectors - in case of wrong heuristics - for performance reasons - to decode the data as another protocol (TODO) Currently (if I am not wrong), all dissectors but NFS can be disabled (and dissectors that do not register protocols :-) I do not like the way the RPC sub-dissectors are disabled (in the sub-dissectors) since this could be done in the RPC dissector itself, knowing the sub-protocol hfinfo entry (this is why, I've not modified the NFS one yet). Two functions are added in proto.c : gboolean proto_is_protocol_enabled(int n); void proto_set_decoding(int n, gboolean enabled); and two MACROs which can be used in dissectors: OLD_CHECK_DISPLAY_AS_DATA(index, pd, offset, fd, tree) CHECK_DISPLAY_AS_DATA(index, tvb, pinfo, tree) See also the XXX in proto_dlg.c and proto.c around the new functions. svn path=/trunk/; revision=2267
563 lines
16 KiB
C
563 lines
16 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 1.40 2000/08/13 14:08:00 deniel 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 "packet-atalk.h"
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#include "etypes.h"
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#include "ppptypes.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_tuple_net = -1;
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static int hf_rtmp_tuple_dist = -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 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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/* P = Padding, H = Hops, L = Len */
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#if BYTE_ORDER == BIG_ENDIAN
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/* PPHHHHLL LLLLLLLL */
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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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#else
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/* LLLLLLLL PPHHHHLL*/
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# define ddp_hops(x) ( x & 0x3C )
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# define ddp_len(x) ( ntohs(x) & 0x03ff )
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#endif
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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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gchar *
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atalk_addr_to_str(const struct atalk_ddp_addr *addrp)
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{
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static gchar str[3][14];
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static gchar *cur;
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if (cur == &str[0][0]) {
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cur = &str[1][0];
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} else if (cur == &str[1][0]) {
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cur = &str[2][0];
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} else {
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cur = &str[0][0];
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}
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sprintf(cur, "%u.%u:%u", addrp->net, addrp->node, addrp->port);
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return cur;
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}
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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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#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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int dissect_pascal_string(const u_char *pd, int offset, frame_data *fd,
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proto_tree *tree, int hf_index)
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{
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int len;
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if ( ! BYTES_ARE_IN_FRAME(offset,1) ) {
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old_dissect_data(pd,offset,fd,tree);
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return END_OF_FRAME;
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}
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len = pd[offset];
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if ( ! BYTES_ARE_IN_FRAME(offset,len) ) {
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old_dissect_data(pd,offset,fd,tree);
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return END_OF_FRAME;
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}
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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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tmp = g_malloc( len+1 );
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memcpy(tmp, &pd[offset], len);
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tmp[len] = 0;
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item = proto_tree_add_string(tree, hf_index, NullTVB, 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, NullTVB, offset-1, 1, "Length: %d", len);
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proto_tree_add_text(subtree, NullTVB, 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(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
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old_dissect_data(pd, offset, fd, tree);
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return;
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}
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static void
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dissect_rtmp_data(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
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proto_tree *rtmp_tree;
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proto_item *ti;
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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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OLD_CHECK_DISPLAY_AS_DATA(proto_rtmp, pd, offset, fd, tree);
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if (!BYTES_ARE_IN_FRAME(offset, 3)) {
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old_dissect_data(pd, offset, fd, tree);
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return;
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}
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net = pntohs(&pd[offset]);
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nodelen_bits = pd[offset+2];
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if ( nodelen_bits <= 8 ) {
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node = pd[offset]+1;
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nodelen = 1;
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} else {
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node = pntohs(&pd[offset]);
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nodelen = 2;
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}
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if (check_col(fd, COL_PROTOCOL))
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col_add_str(fd, COL_PROTOCOL, "RTMP");
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if (check_col(fd, COL_INFO))
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col_add_fstr(fd, COL_INFO, "Net: %d Node Len: %d Node: %d",
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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, NullTVB, offset, END_OF_FRAME, 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, NullTVB, offset, 2, net);
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proto_tree_add_uint(rtmp_tree, hf_rtmp_node_len, NullTVB, offset+2, 1, nodelen_bits);
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proto_tree_add_uint(rtmp_tree, hf_rtmp_node, NullTVB, offset+3, nodelen, nodelen);
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offset += 3 + nodelen;
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i = 1;
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while ( BYTES_ARE_IN_FRAME(offset, 1) )
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{
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proto_tree *tuple_item, *tuple_tree;
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guint16 tuple_net, tuple_net2;
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guint8 tuple_dist, tuple_dist2;
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if ( ! BYTES_ARE_IN_FRAME(offset, 3) )
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{
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old_dissect_data(pd,offset,fd,rtmp_tree);
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return;
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}
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tuple_net = pntohs(&pd[offset]);
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tuple_dist = pd[offset+2];
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tuple_item = proto_tree_add_text(rtmp_tree, NullTVB, offset, 3,
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"Tuple %d: Net: %d Dist: %d",
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i, tuple_net, tuple_dist);
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tuple_tree = proto_item_add_subtree(tuple_item, ett_rtmp_tuple);
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proto_tree_add_uint(tuple_tree, hf_rtmp_tuple_net, NullTVB, offset, 2,
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tuple_net);
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proto_tree_add_uint(tuple_tree, hf_rtmp_tuple_dist, NullTVB, offset+2, 1,
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tuple_dist);
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if ( tuple_dist == 0 || tuple_dist & 0x80 ) /* phase 1/2 */
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{
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if ( ! BYTES_ARE_IN_FRAME(offset+3, 3) )
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{
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old_dissect_data(pd,offset,fd,rtmp_tree);
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return;
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}
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tuple_net2 = pntohs(&pd[offset+3]);
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tuple_dist2 = pd[offset+5];
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proto_tree_add_uint(tuple_tree, hf_rtmp_tuple_net, NullTVB, offset, 2,
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tuple_net2);
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proto_tree_add_uint(tuple_tree, hf_rtmp_tuple_dist, NullTVB, offset+2, 1,
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tuple_dist2);
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proto_item_set_len(tuple_item, 6);
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offset += 6;
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}
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else /* screwy gatorbox/etc. */
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{
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offset += 3;
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}
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i++;
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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_nbp(const u_char *pd, int offset, frame_data *fd, 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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guint op, count;
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int i;
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OLD_CHECK_DISPLAY_AS_DATA(proto_nbp, pd, offset, fd, tree);
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if (!BYTES_ARE_IN_FRAME(offset, 2)) {
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old_dissect_data(pd, offset, fd, tree);
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return;
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}
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op = pd[offset] >> 4;
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count = pd[offset] & 0x0F;
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if (check_col(fd, COL_PROTOCOL))
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col_add_str(fd, COL_PROTOCOL, "NBP");
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if (check_col(fd, COL_INFO))
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col_add_fstr(fd, COL_INFO, "Op: %s Count: %d",
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val_to_str(op, nbp_op_vals, "unknown (%1x)"), count);
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if (tree) {
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ti = proto_tree_add_item(tree, proto_nbp, NullTVB, offset, END_OF_FRAME, 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, NullTVB, offset, 1,
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pd[offset],
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"Info: 0x%01X Operation: %s Count: %d", pd[offset],
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val_to_str(op, nbp_op_vals, "unknown"),
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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, NullTVB, offset, 1, pd[offset]);
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proto_tree_add_uint(nbp_info_tree, hf_nbp_count, NullTVB, offset, 1, pd[offset]);
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proto_tree_add_uint(nbp_tree, hf_nbp_tid, NullTVB, offset+1, 1, pd[offset+1]);
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offset += 2;
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for (i=0; i<count; i++) {
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struct atalk_ddp_addr addr;
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proto_tree *node_item,*node_tree;
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int soffset = offset;
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if ( !BYTES_ARE_IN_FRAME(offset, 6) ) {
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old_dissect_data(pd,offset,fd,nbp_tree);
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return;
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}
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node_item = proto_tree_add_text(nbp_tree, NullTVB, 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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addr.net = pntohs(&pd[offset]);
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addr.node = pd[offset+2];
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addr.port = pd[offset+3];
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/* note, this is probably wrong, I need to look at my info at work
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tomorrow to straighten it out */
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proto_tree_add_uint(node_tree, hf_nbp_node_net, NullTVB, offset, 2, addr.net);
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offset += 2;
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proto_tree_add_uint(node_tree, hf_nbp_node_node, NullTVB, offset, 1, addr.node);
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offset++;
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proto_tree_add_uint(node_tree, hf_nbp_node_port, NullTVB, offset, 1, addr.port);
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offset++;
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proto_tree_add_uint(node_tree, hf_nbp_node_enum, NullTVB, offset, 1, pd[offset]);
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offset++;
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offset = dissect_pascal_string(pd,offset,fd,node_tree,hf_nbp_node_object);
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offset = dissect_pascal_string(pd,offset,fd,node_tree,hf_nbp_node_type);
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offset = dissect_pascal_string(pd,offset,fd,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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void
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dissect_ddp(const u_char *pd, int offset, frame_data *fd, 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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OLD_CHECK_DISPLAY_AS_DATA(proto_ddp, pd, offset, fd, tree);
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if (!BYTES_ARE_IN_FRAME(offset, DDP_HEADER_SIZE)) {
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old_dissect_data(pd, offset, fd, tree);
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return;
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}
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memcpy(&ddp, &pd[offset], 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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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(&pi.net_src, AT_ATALK, sizeof src, (guint8 *)&src);
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SET_ADDRESS(&pi.src, AT_ATALK, sizeof src, (guint8 *)&src);
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SET_ADDRESS(&pi.net_dst, AT_ATALK, sizeof dst, (guint8 *)&dst);
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SET_ADDRESS(&pi.dst, AT_ATALK, sizeof dst, (guint8 *)&dst);
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if (check_col(fd, COL_PROTOCOL))
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col_add_str(fd, COL_PROTOCOL, "DDP");
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if (check_col(fd, COL_INFO))
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col_add_str(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, NullTVB, offset, DDP_HEADER_SIZE, 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, NullTVB, offset, 1,
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ddp_hops(ddp.hops_len));
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proto_tree_add_uint(ddp_tree, hf_ddp_len, NullTVB, offset, 2,
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ddp_len(ddp.hops_len));
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proto_tree_add_uint(ddp_tree, hf_ddp_checksum, NullTVB, offset + 2, 2, ddp.sum);
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proto_tree_add_uint(ddp_tree, hf_ddp_dst_net, NullTVB, offset + 4, 2, ddp.dnet);
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proto_tree_add_uint(ddp_tree, hf_ddp_src_net, NullTVB, offset + 6, 2, ddp.snet);
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proto_tree_add_uint(ddp_tree, hf_ddp_dst_node, NullTVB, offset + 8, 1, ddp.dnode);
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proto_tree_add_uint(ddp_tree, hf_ddp_src_node, NullTVB, offset + 9, 1, ddp.snode);
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proto_tree_add_uint(ddp_tree, hf_ddp_dst_socket, NullTVB, offset + 10, 1, ddp.dport);
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proto_tree_add_uint(ddp_tree, hf_ddp_src_socket, NullTVB, offset + 11, 1, ddp.sport);
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proto_tree_add_uint(ddp_tree, hf_ddp_type, NullTVB, offset + 12, 1, ddp.type);
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}
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offset += DDP_HEADER_SIZE;
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if (!old_dissector_try_port(ddp_dissector_table, ddp.type, pd, offset, fd, tree))
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old_dissect_data(pd, offset, fd, 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,
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{ "Destination Net", "ddp.dst.net", FT_UINT16, BASE_DEC, NULL, 0x0,
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"" }},
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{ &hf_ddp_src_net,
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{ "Source Net", "ddp.src.net", FT_UINT16, BASE_DEC, NULL, 0x0,
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"" }},
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{ &hf_ddp_dst_node,
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{ "Destination Node", "ddp.dst.node", FT_UINT8, BASE_DEC, NULL, 0x0,
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"" }},
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{ &hf_ddp_src_node,
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{ "Source Node", "ddp.src.node", FT_UINT8, BASE_DEC, NULL, 0x0,
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"" }},
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{ &hf_ddp_dst_socket,
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{ "Destination Socket", "ddp.dst.socket", FT_UINT8, BASE_DEC, NULL, 0x0,
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"" }},
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{ &hf_ddp_src_socket,
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{ "Source Socket", "ddp.src.socket", FT_UINT8, BASE_DEC, NULL, 0x0,
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"" }},
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{ &hf_ddp_type,
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{ "Protocol type", "ddp.type", FT_UINT8, BASE_DEC, VALS(op_vals), 0x0,
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"" }},
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};
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static hf_register_info hf_nbp[] = {
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{ &hf_nbp_op,
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{ "Operation", "nbp.op", FT_UINT8, BASE_DEC,
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VALS(nbp_op_vals), 0xF0, "Operation" }},
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{ &hf_nbp_info,
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{ "Info", "nbp.info", FT_UINT8, BASE_HEX,
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NULL, 0x0, "Info" }},
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{ &hf_nbp_count,
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{ "Count", "nbp.count", FT_UINT8, BASE_DEC,
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NULL, 0x0F, "Count" }},
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{ &hf_nbp_node_net,
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{ "Network", "nbp.net", FT_UINT16, BASE_DEC,
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NULL, 0x0, "Network" }},
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{ &hf_nbp_node_node,
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{ "Node", "nbp.node", FT_UINT8, BASE_DEC,
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NULL, 0x0, "Node" }},
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{ &hf_nbp_node_port,
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{ "Port", "nbp.port", FT_UINT8, BASE_DEC,
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NULL, 0x0, "Port" }},
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{ &hf_nbp_node_enum,
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{ "Enumerator", "nbp.enum", FT_UINT8, BASE_DEC,
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NULL, 0x0, "Enumerator" }},
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{ &hf_nbp_node_object,
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{ "Object", "nbp.object", FT_STRING, BASE_DEC,
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NULL, 0x0, "Object" }},
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{ &hf_nbp_node_type,
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{ "Type", "nbp.type", FT_STRING, BASE_DEC,
|
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NULL, 0x0, "Type" }},
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{ &hf_nbp_node_zone,
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{ "Zone", "nbp.zone", FT_STRING, BASE_DEC,
|
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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_dist,
|
|
{ "Distance", "rtmp.tuple.dist", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "Distance" }}
|
|
};
|
|
|
|
|
|
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");
|
|
proto_register_field_array(proto_ddp, hf_ddp, array_length(hf_ddp));
|
|
|
|
proto_nbp = proto_register_protocol("Name Binding Protocol", "nbp");
|
|
proto_register_field_array(proto_nbp, hf_nbp, array_length(hf_nbp));
|
|
|
|
proto_rtmp = proto_register_protocol("Routing Table", "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)
|
|
{
|
|
old_dissector_add("ethertype", ETHERTYPE_ATALK, dissect_ddp);
|
|
old_dissector_add("ppp.protocol", PPP_AT, dissect_ddp);
|
|
old_dissector_add("ddp.type", DDP_NBP, dissect_nbp);
|
|
old_dissector_add("ddp.type", DDP_RTMPREQ, dissect_rtmp_request);
|
|
old_dissector_add("ddp.type", DDP_RTMPDATA, dissect_rtmp_data);
|
|
}
|