forked from osmocom/wireshark
Cleanup:
- remove duplicate/unneeded #includes
- remove some boilerplate comments
- fix up whitespace: indentation, trailing & etc
- remove 'if (tree)'
(Note: 'if (tree)' needs to be around all the code (as in the previous
version of packet-wsmp) or none so that the same value of offset is used
in various function calls whether or not 'tree == NULL'.
For the moment I've chosen to remove the 'if (tree)' since (in theory)
the (external) data dissector shouldn't be called under 'if (tree)'.
- revert SVN #52757 since no it's longer needed with the removal of 'if (tree)';
- remove another unneeded line of code.
svn path=/trunk/; revision=52761
This commit is contained in:
Bill Meier
parent
29b709298e
commit
a7fbfd70cf
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@ -10,8 +10,6 @@
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* Copied from README.developer
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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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@ -33,14 +31,12 @@
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#include <epan/packet.h>
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#include <epan/etypes.h>
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#include <epan/prefs.h>
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#include <glib.h>
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#define WSMP 0x80
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#define WSMP_S 0x81
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#define WSMP_I 0x82
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#define CHANNUM 0x0F
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#define DATARATE 0x10
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#define WSMP 0x80
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#define WSMP_S 0x81
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#define WSMP_I 0x82
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#define CHANNUM 0x0F
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#define DATARATE 0x10
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#define TRANSMITPW 0x04
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static const value_string wsmp_elemenid_names[] = {
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@ -63,11 +59,11 @@ static int hf_wsmp_txpower = -1;
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static int hf_wsmp_WAVEid = -1;
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static int hf_wsmp_wsmlength = -1;
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static int hf_wsmp_WSMP_S_data = -1;
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/* Savari function to get the length of a psid based on the number of
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successive 1s in the most sig bits of the most sig octet. Taken
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from libwme
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*/
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int wme_getpsidlen (guint8 *psid)
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{
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int length = 0;
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@ -81,218 +77,194 @@ int wme_getpsidlen (guint8 *psid)
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length = 2;
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} else if ((psid[0] & 0x80) == 0x00) {
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length = 1;
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}
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}
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return length;
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}
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/* Initialize the subtree pointers */
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static gint ett_wsmp = -1;
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static gint ett_wsmdata = -1;
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/* Code to actually dissect the packets */
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static void
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dissect_wsmp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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/* Set up structures needed to add the protocol subtree and manage it */
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proto_item *ti, *wsmdata_item;
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proto_tree *wsmp_tree, *wsmdata_tree;
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tvbuff_t *wsmdata_tvb;
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guint16 wsmlength, offset;
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guint32 psidLen, psid;
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guint8 elemenId, elemenLen, msb, supLen;
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/* Set up structures needed to add the protocol subtree and manage it */
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proto_item *ti, *wsmdata_item;
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proto_tree *wsmp_tree, *wsmdata_tree;
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tvbuff_t *wsmdata_tvb;
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guint16 wsmlength, offset;
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guint32 psidLen, psid;
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guint8 elemenId, elemenLen, msb, supLen;
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/* Make entries in Protocol column and Info column on summary display */
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "WSMP");
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/* Make entries in Protocol column and Info column on summary display */
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "WSMP");
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col_set_str(pinfo->cinfo, COL_INFO, "WAVE Short Message Protocol IEEE P1609.3");
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col_set_str(pinfo->cinfo, COL_INFO, "WAVE Short Message Protocol IEEE P1609.3");
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/* create display subtree for the protocol */
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ti = proto_tree_add_item(tree, proto_wsmp, tvb, 0, -1, ENC_NA);
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/* create display subtree for the protocol */
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ti = proto_tree_add_item(tree, proto_wsmp, tvb, 0, -1, ENC_NA);
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wsmp_tree = proto_item_add_subtree(ti, ett_wsmp);
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wsmp_tree = proto_item_add_subtree(ti, ett_wsmp);
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offset = 0;
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proto_tree_add_item(wsmp_tree,
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offset = 0;
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proto_tree_add_item(wsmp_tree,
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hf_wsmp_version, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset ++;
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offset++;
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psid = tvb_get_guint8(tvb, offset);
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psidLen =(guint32)wme_getpsidlen((guint8*)&psid);
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psid = tvb_get_guint8(tvb, offset);
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psidLen = (guint32)wme_getpsidlen((guint8*)&psid);
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if(psidLen == 2)
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psid = tvb_get_ntohs(tvb, offset);
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else if(psidLen == 3)
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if (psidLen == 2)
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psid = tvb_get_ntohs(tvb, offset);
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else if (psidLen == 3)
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{
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psid = tvb_get_ntohl(tvb, offset);
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psid = psid & 0x00FFFF; /* three bytes */
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}
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else if (psidLen == 4)
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psid = tvb_get_ntohl(tvb, offset);
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proto_tree_add_item(wsmp_tree,
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hf_wsmp_psid, tvb, offset, psidLen, ENC_BIG_ENDIAN);
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offset += psidLen;
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elemenId = tvb_get_guint8(tvb, offset);
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while ((elemenId != WSMP) && (elemenId != WSMP_S) && (elemenId != WSMP_I))
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{
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offset++;
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if (elemenId == CHANNUM)
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{
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psid = tvb_get_ntohl(tvb, offset);
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psid = psid & 0x00FFFF; /* three bytes */
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}
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else if(psidLen ==4)
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psid = tvb_get_ntohl(tvb, offset);
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wsmlength = 0;
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if (tree) {
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proto_tree_add_item(wsmp_tree,
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hf_wsmp_psid, tvb, offset, psidLen, ENC_BIG_ENDIAN);
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offset += psidLen;
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elemenId = tvb_get_guint8(tvb, offset);
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while(elemenId != WSMP && elemenId != WSMP_S
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&& elemenId != WSMP_I)
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{
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offset++;
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if(elemenId == CHANNUM)
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{
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/* channel number */
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elemenLen = tvb_get_guint8(tvb, offset);
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offset++;
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proto_tree_add_item(wsmp_tree,
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/* channel number */
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elemenLen = tvb_get_guint8(tvb, offset);
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offset++;
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proto_tree_add_item(wsmp_tree,
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hf_wsmp_channel, tvb, offset, elemenLen, ENC_BIG_ENDIAN);
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offset += elemenLen;
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}
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else if(elemenId == DATARATE)
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{
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/* Data rate */
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elemenLen = tvb_get_guint8(tvb, offset);
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offset++;
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proto_tree_add_item(wsmp_tree,
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hf_wsmp_rate, tvb, offset, elemenLen, ENC_BIG_ENDIAN);
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offset += elemenLen;
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}
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else if(elemenId == TRANSMITPW)
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{
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/* Transmit power */
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elemenLen = tvb_get_guint8(tvb, offset);
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offset++;
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proto_tree_add_item(wsmp_tree,
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hf_wsmp_txpower, tvb, offset, elemenLen, ENC_BIG_ENDIAN);
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offset += elemenLen;
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}
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elemenId = tvb_get_guint8(tvb, offset);
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elemenLen = 0;
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}
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proto_tree_add_item(wsmp_tree,
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hf_wsmp_WAVEid, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset ++;
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wsmlength = tvb_get_letohs( tvb, offset);
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proto_tree_add_item(wsmp_tree,
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hf_wsmp_wsmlength, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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if(elemenId == WSMP_S)
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{
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msb = 1;
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supLen = 0;
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while(msb)
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{
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msb = tvb_get_guint8(tvb, offset + supLen);
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msb = msb & 0x80;
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supLen++;
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}
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proto_tree_add_item(wsmp_tree,
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hf_wsmp_WSMP_S_data, tvb, offset, supLen, ENC_BIG_ENDIAN);
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wsmlength -= supLen;
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offset += supLen;
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}
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offset += elemenLen;
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}
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wsmdata_item = proto_tree_add_text (wsmp_tree, tvb, offset, wsmlength,
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"Wave Short Message");
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wsmdata_tree = proto_item_add_subtree(wsmdata_item, ett_wsmdata);
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wsmdata_tvb = tvb_new_subset(tvb, offset,-1, wsmlength);
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/* TODO: Branch on the application context and display accordingly
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* Default call the data dissector
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*/
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if(psid == 0xbff0)
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else if (elemenId == DATARATE)
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{
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call_dissector(data_handle, wsmdata_tvb, pinfo, wsmdata_tree);
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/* Data rate */
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elemenLen = tvb_get_guint8(tvb, offset);
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offset++;
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proto_tree_add_item(wsmp_tree,
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hf_wsmp_rate, tvb, offset, elemenLen, ENC_BIG_ENDIAN);
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offset += elemenLen;
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}
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else if (elemenId == TRANSMITPW)
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{
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/* Transmit power */
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elemenLen = tvb_get_guint8(tvb, offset);
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offset++;
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proto_tree_add_item(wsmp_tree,
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hf_wsmp_txpower, tvb, offset, elemenLen, ENC_BIG_ENDIAN);
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offset += elemenLen;
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}
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elemenId = tvb_get_guint8(tvb, offset);
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}
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proto_tree_add_item(wsmp_tree,
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hf_wsmp_WAVEid, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset++;
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wsmlength = tvb_get_letohs( tvb, offset);
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proto_tree_add_item(wsmp_tree,
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hf_wsmp_wsmlength, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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if (elemenId == WSMP_S)
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{
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msb = 1;
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supLen = 0;
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while (msb)
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{
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msb = tvb_get_guint8(tvb, offset + supLen);
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msb = msb & 0x80;
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supLen++;
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}
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proto_tree_add_item(wsmp_tree,
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hf_wsmp_WSMP_S_data, tvb, offset, supLen, ENC_BIG_ENDIAN);
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wsmlength -= supLen;
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offset += supLen;
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}
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wsmdata_item = proto_tree_add_text (wsmp_tree, tvb, offset, wsmlength,
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"Wave Short Message");
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wsmdata_tree = proto_item_add_subtree(wsmdata_item, ett_wsmdata);
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wsmdata_tvb = tvb_new_subset(tvb, offset, -1, wsmlength);
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/* TODO: Branch on the application context and display accordingly
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* Default: call the data dissector
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*/
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if (psid == 0xbff0)
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{
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call_dissector(data_handle, wsmdata_tvb, pinfo, wsmdata_tree);
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}
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}
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/* Register the protocol with Wireshark */
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/* this format is require because a script is used to build the C function
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that calls all the protocol registration.
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*/
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void
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proto_register_wsmp(void)
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{
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/* Setup list of header fields See Section 1.6.1 for details*/
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static hf_register_info hf[] = {
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{ &hf_wsmp_version,
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{ "Version", "wsmp.version", FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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/* Setup list of header fields See Section 1.6.1 for details*/
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static hf_register_info hf[] = {
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{ &hf_wsmp_version,
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{ "Version", "wsmp.version", FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_wsmp_psid,
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{ "PSID", "wsmp.psid", FT_UINT32, BASE_HEX, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_wsmp_psid,
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{ "PSID", "wsmp.psid", FT_UINT32, BASE_HEX, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_wsmp_channel,
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{ "Channel", "wsmp.channel", FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_wsmp_channel,
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{ "Channel", "wsmp.channel", FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_wsmp_rate,
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{ "Data Rate", "wsmp.rate", FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_wsmp_rate,
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{ "Data Rate", "wsmp.rate", FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_wsmp_txpower,
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{ "Transmit Power", "wsmp.txpower", FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_wsmp_txpower,
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{ "Transmit Power", "wsmp.txpower", FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_wsmp_WAVEid,
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{ "WAVE element id", "wsmp.WAVEid", FT_UINT8, BASE_DEC, VALS(wsmp_elemenid_names), 0x0,
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NULL, HFILL }},
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{ &hf_wsmp_WAVEid,
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{ "WAVE element id", "wsmp.WAVEid", FT_UINT8, BASE_DEC, VALS(wsmp_elemenid_names), 0x0,
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NULL, HFILL }},
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{ &hf_wsmp_wsmlength,
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{ "WSM Length", "wsmp.wsmlength", FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_wsmp_wsmlength,
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{ "WSM Length", "wsmp.wsmlength", FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_wsmp_WSMP_S_data,
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{ "WAVE Supplement Data", "wsmp.supplement", FT_UINT8, BASE_HEX, NULL, 0x0,
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NULL, HFILL }},
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};
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{ &hf_wsmp_WSMP_S_data,
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{ "WAVE Supplement Data", "wsmp.supplement", FT_UINT8, BASE_HEX, NULL, 0x0,
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NULL, HFILL }},
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};
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/* Setup protocol subtree array */
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static gint *ett[] = {
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&ett_wsmp,
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&ett_wsmdata,
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};
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/* Setup protocol subtree array */
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static gint *ett[] = {
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&ett_wsmp,
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&ett_wsmdata,
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};
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/* Register the protocol name and description */
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proto_wsmp = proto_register_protocol("Wave Short Message Protocol(IEEE P1609.3)",
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"WSMP", "wsmp");
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/* Required function calls to register the header fields and subtrees used */
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proto_register_field_array(proto_wsmp, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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/* Register the protocol name and description */
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proto_wsmp = proto_register_protocol("Wave Short Message Protocol(IEEE P1609.3)",
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"WSMP", "wsmp");
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/* Required function calls to register the header fields and subtrees used */
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proto_register_field_array(proto_wsmp, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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/* If this dissector uses sub-dissector registration add a registration routine.
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This exact format is required because a script is used to find these routines
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and create the code that calls these routines.
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*/
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void
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proto_reg_handoff_wsmp(void)
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{
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dissector_handle_t wsmp_handle;
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dissector_handle_t wsmp_handle;
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wsmp_handle = create_dissector_handle(dissect_wsmp, proto_wsmp);
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dissector_add_uint("ethertype", ETHERTYPE_WSMP, wsmp_handle);
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data_handle = find_dissector("data");
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return;
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wsmp_handle = create_dissector_handle(dissect_wsmp, proto_wsmp);
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dissector_add_uint("ethertype", ETHERTYPE_WSMP, wsmp_handle);
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data_handle = find_dissector("data");
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return;
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}
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