Wireshark · Ethereal-dev: [Ethereal-dev] packet-tds.c patch / [off-topic] - a unified diff tool for Win32

[Yaniv Kaul <ykaul@xxxxxxxxxxxx>]

This patch to packet-tds.c (over CVS nightly tarball from Jan20) adds 
dissection to result token, login_ack token, corrects a small bug in the 
login packet dissection and a partial dissection to query packet.

Q - I'm trying to set up a complete work environment on Win32. I've 
managed to get the CVS client but I'm having problems getting a diff 
tool that will create the unified diff. Any suggestions?
298d297
< static gint ett_tds7_query = 0;
369c368
< 	{TDS7_RESULT_TOKEN, "TDS7+ Results"},
---
> 	{TDS7_RESULT_TOKEN, "Results"},
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< dissect_tds_query_packet(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
< {
< 	guint offset, len;
< 	gboolean is_unicode = TRUE;
< 	char *msg;
< 
< 	proto_item *query_hdr;
< 	proto_tree *query_tree;
< 	
< 	offset = 0;
< 	query_hdr = proto_tree_add_text(tree, tvb, offset, -1, "TDS Query Packet");
< 	query_tree = proto_item_add_subtree(query_hdr, ett_tds7_query);
< 	len = tvb_reported_length_remaining(tvb, offset);
< 	if((len < 2) || tvb_get_guint8(tvb, offset+1) !=0)
< 		is_unicode = FALSE;
< 	
< 	if (is_unicode) {
< 		msg = tvb_fake_unicode(tvb, offset, len/2, TRUE);
< 		proto_tree_add_text(query_tree, tvb, offset, len, "Query: %s", msg);
< 		g_free(msg);
< 		offset += len;
< 	}
< }
< 
< static void
581,594c555,565
< 			if( i != 2) {
< 				if (is_unicode == TRUE) {
< 					val = tvb_fake_unicode(tvb, offset2, len, TRUE);
< 					len *= 2;
< 				} else
< 					val = tvb_get_string(tvb, offset2, len);
< 				proto_tree_add_text(login_tree, tvb, offset2, len, "%s: %s", val_to_str(i, login_field_names, "Unknown"), val);
< 				g_free(val);
< 			}
< 			else {
< 				if (is_unicode)
< 					len *= 2;
< 				proto_tree_add_text(login_tree, tvb, offset2, len, "%s", val_to_str(i, login_field_names, "Unknown"));
< 			}
---
> 			if (is_unicode == TRUE) {
> 				val = tvb_fake_unicode(tvb, offset2, len,
> 				    TRUE);
> 				len *= 2;
> 			} else
> 				val = tvb_get_string(tvb, offset2, len);
> 			proto_tree_add_text(login_tree, tvb, offset2, len,
> 				"%s: %s",
> 				val_to_str(i, login_field_names, "Unknown"),
> 				val);
> 			g_free(val);
632d602
<           case TDS7_RESULT_TOKEN:
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< dissect_tds_login_ack_token(tvbuff_t *tvb, guint offset, guint token_sz, proto_tree *tree)
< {
< 	guint8 msg_len;
< 	char *msg;
< 	gboolean is_unicode = FALSE;
< 
< 	proto_tree_add_text(tree, tvb, offset, 1, "Ack: %u", tvb_get_guint8(tvb, offset));
< 	offset +=1;
< 	proto_tree_add_text(tree, tvb, offset, 1, "Major version (may be incorrect): %d", tvb_get_guint8(tvb, offset));
< 	offset +=1;
< 	proto_tree_add_text(tree, tvb, offset, 1, "Minor version (may be incorrect): %d", tvb_get_guint8(tvb, offset));
< 	offset +=1;
< 	proto_tree_add_text(tree, tvb, offset, 2, "zero usually");
< 	offset +=2;
< 
< 	msg_len = tvb_get_guint8(tvb, offset);
< 	proto_tree_add_text(tree, tvb, offset, 1, "Text length: %u characters", msg_len);
< 	offset +=1;
< 
< 	if(msg_len + 6U + 3U != token_sz - 1) /* 6 is the length of ack(1), version (4), text length (1) fields */
< 		is_unicode = TRUE;
< 	proto_tree_add_text(tree, tvb, offset, 0, "msg_len: %d, token_sz: %d, total: %d",msg_len, token_sz, msg_len + 6U + 3U);
< 	if(is_unicode) {
< 		msg = tvb_fake_unicode(tvb, offset, msg_len, TRUE);
< 		msg_len *= 2;
< 	} else {
< 		msg = tvb_get_string(tvb, offset, msg_len);
< 	}
< 	proto_tree_add_text(tree, tvb, offset, msg_len, "Text: %s", format_text(msg, strlen(msg)));
< 	g_free(msg);
< 	offset += msg_len;
< 	
< 	proto_tree_add_text(tree, tvb, offset, 4, "Server Version");
< 	offset += 4;
< }
< 
< int 
< dissect_tds7_results_token(tvbuff_t *tvb, guint offset, guint token_sz, proto_tree *tree)
< {
< 	guint16 num_columns;
< 	guint8 type, msg_len;
< 	int i;
< 	char *msg;
< 	guint16 collate_codepage, collate_flags;
< 	guint8 collate_charset_id;
< 
< 	num_columns = tvb_get_letohs(tvb, offset);
< 	proto_tree_add_text(tree, tvb, offset, 2, "Columns: %u", tvb_get_letohs(tvb, offset));
< 	offset +=2;
< 	for(i=0; i != num_columns; i++) {
< 		proto_tree_add_text(tree, tvb, offset, 2, "usertype: %d", tvb_get_letohs(tvb, offset));
< 		offset +=2;
< 		proto_tree_add_text(tree, tvb, offset, 2, "flags: %d", tvb_get_letohs(tvb, offset));
< 		offset +=2;
< 		type  = tvb_get_guint8(tvb, offset);
< 		proto_tree_add_text(tree, tvb, offset, 1, "Type: %d", type);
< 		offset +=1;
< 		if(type > 128) {
< 			proto_tree_add_text(tree, tvb, offset, 2, "Large type size: 0x%x", tvb_get_letohs(tvb, offset));
< 			offset += 2;
< 			collate_codepage = tvb_get_letohs(tvb, offset);
< 			proto_tree_add_text(tree, tvb, offset, 2, "Codepage: %u" , collate_codepage);
< 			offset += 2;
< 			collate_flags = tvb_get_letohs(tvb, offset);
< 			proto_tree_add_text(tree, tvb, offset, 2, "Flags: 0x%x", collate_flags);
< 			offset += 2;
< 			collate_charset_id = tvb_get_guint8(tvb, offset);
< 			proto_tree_add_text(tree, tvb, offset, 1, "Charset ID: %u", collate_charset_id);
< 			offset +=1;
< 		}
< 		msg_len = tvb_get_guint8(tvb, offset);
< 		proto_tree_add_text(tree, tvb, offset, 1, "message length: %d",msg_len);
< 		offset += 1;
< 		if(msg_len != 0) {
< 			msg = tvb_fake_unicode(tvb, offset, msg_len, TRUE);
< 			proto_tree_add_text(tree, tvb, offset, msg_len*2, "Text: %s", format_text(msg, strlen(msg)));
< 			g_free(msg);
< 			offset += msg_len*2;
< 		}
< 	}
< 	return offset;
< }
< 
< static void
1180,1185d1065
< 		case TDS_LOGIN_ACK_TOKEN:
< 			dissect_tds_login_ack_token(tvb, pos + 3, token_sz - 3, token_tree);
< 			break;
< 		case TDS7_RESULT_TOKEN:
< 			pos = (dissect_tds7_results_token(tvb, pos + 1, token_sz - 1, token_tree)-1);
< 			break;
1299,1301c1179
< 		case TDS_QUERY_PKT:
< 			dissect_tds_query_packet(next_tvb, pinfo, tds_tree);
< 			break;
---
>