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Describe the use of FT_NONE, FT_STRING and other string-of-character 

types, and FT_BYTES in more detail.

FT_TEXT_ONLY is gone; remove it.

svn path=/trunk/; revision=3730
This commit is contained in:
Guy Harris 2001-07-16 06:16:14 +00:00
parent 30c935a72e
commit b5c9211473
1 changed files with 20 additions and 9 deletions
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doc/README.developer
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@ -1,4 +1,4 @@
$Id: README.developer,v 1.29 2001/07/10 01:22:58 hagbard Exp $
$Id: README.developer,v 1.30 2001/07/16 06:16:14 guy Exp $
This file is a HOWTO for Ethereal developers. It describes how to start coding
a Ethereal protocol dissector and the use some of the important functions and
@ -62,7 +62,7 @@ code inside
is needed only if you are using the "snprintf()" function.
The "$Id: README.developer,v 1.29 2001/07/10 01:22:58 hagbard Exp $"
The "$Id: README.developer,v 1.30 2001/07/16 06:16:14 guy Exp $"
in the comment will be updated by CVS when the file is
checked in; it will allow the RCS "ident" command to report which
version of the file is currently checked out.
@ -72,7 +72,7 @@ version of the file is currently checked out.
* Routines for PROTONAME dissection
* Copyright 2000, YOUR_NAME <YOUR_EMAIL_ADDRESS>
*
* $Id: README.developer,v 1.29 2001/07/10 01:22:58 hagbard Exp $
* $Id: README.developer,v 1.30 2001/07/16 06:16:14 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
@ -621,7 +621,16 @@ type
----
The type of value this field holds. The current field types are:
FT_NONE No field type. Used for protocol labels.
FT_NONE No field type. Used for fields that
aren't given a value, and that can only
be tested for presence or absence; a
field that represents a data structure,
with a subtree below it containing
fields for the members of the structure,
or that represents an array with a
subtree below it containing fields for
the members of the array, might be an
FT_NONE field.
FT_BOOLEAN 0 means "false", any other value means
"true".
FT_UINT8 An 8-bit unsigned integer.
@ -640,7 +649,11 @@ The type of value this field holds. The current field types are:
FT_RELATIVE_TIME Seconds (4 bytes) and microseconds (4 bytes)
of time displayed as seconds and 6 digits
after the decimal point.
FT_STRING A string of characters.
FT_STRING A string of characters, not necessarily
NUL-terminated, but possibly NUL-padded.
This, and the other string-of-characters
types, are to be used for text strings,
not raw binary data.
FT_STRINGZ A NUL-terminated string of characters.
FT_UINT_STRING A counted string of characters, consisting
of a count (represented as an integral
@ -648,7 +661,8 @@ The type of value this field holds. The current field types are:
specified number of characters.
FT_ETHER A six octet string displayed in
Ethernet-address format.
FT_BYTES A string of bytes.
FT_BYTES A string of bytes with arbitrary values;
used for raw binary data.
FT_IPv4 A version 4 IP address (4 bytes) displayed
in dotted-quad IP address format (4
decimal numbers separated by dots).
@ -657,9 +671,6 @@ The type of value this field holds. The current field types are:
FT_IPXNET An IPX address displayed in hex as a 6-byte
network number followed by a 6-byte station
address.
FT_TEXT_ONLY A reserved, non-filterable type for
converting old style trees. You shouldn't
be using this.
Some of these field types are still not handled in the display filter
routines, but the most common ones are. The FT_UINT* variables all