1999-02-12 09:03:42 +00:00
|
|
|
/* packet-http.c
|
|
|
|
* Routines for HTTP packet disassembly
|
|
|
|
*
|
2000-01-22 06:22:44 +00:00
|
|
|
* Guy Harris <guy@alum.mit.edu>
|
1999-02-12 09:03:42 +00:00
|
|
|
*
|
2000-11-19 08:54:37 +00:00
|
|
|
* $Id: packet-http.c,v 1.29 2000/11/19 08:53:57 guy Exp $
|
1999-02-12 09:03:42 +00:00
|
|
|
*
|
|
|
|
* Ethereal - Network traffic analyzer
|
|
|
|
* By Gerald Combs <gerald@zing.org>
|
|
|
|
* Copyright 1998 Gerald Combs
|
|
|
|
*
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or
|
|
|
|
* modify it under the terms of the GNU General Public License
|
|
|
|
* as published by the Free Software Foundation; either version 2
|
|
|
|
* of the License, or (at your option) any later version.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
|
* GNU General Public License for more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
|
|
* along with this program; if not, write to the Free Software
|
|
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
*
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
1999-07-13 02:53:26 +00:00
|
|
|
#ifdef HAVE_CONFIG_H
|
1999-02-12 09:03:42 +00:00
|
|
|
#include "config.h"
|
1999-07-13 02:53:26 +00:00
|
|
|
#endif
|
1999-02-12 09:03:42 +00:00
|
|
|
|
|
|
|
#ifdef HAVE_SYS_TYPES_H
|
|
|
|
#include <sys/types.h>
|
|
|
|
#endif
|
|
|
|
|
1999-03-23 03:14:46 +00:00
|
|
|
#include <string.h>
|
|
|
|
#include <ctype.h>
|
1999-02-12 09:03:42 +00:00
|
|
|
|
1999-03-23 03:14:46 +00:00
|
|
|
#include <glib.h>
|
1999-02-12 09:03:42 +00:00
|
|
|
#include "packet.h"
|
2000-09-11 16:16:13 +00:00
|
|
|
#include "strutil.h"
|
1999-02-12 09:03:42 +00:00
|
|
|
|
2000-02-23 19:47:14 +00:00
|
|
|
typedef enum _http_type {
|
2000-02-23 20:55:33 +00:00
|
|
|
HTTP_REQUEST,
|
|
|
|
HTTP_RESPONSE,
|
|
|
|
HTTP_OTHERS
|
2000-02-23 19:47:14 +00:00
|
|
|
} http_type_t;
|
|
|
|
|
1999-07-29 05:47:07 +00:00
|
|
|
static int proto_http = -1;
|
1999-10-16 20:30:14 +00:00
|
|
|
static int hf_http_response = -1;
|
|
|
|
static int hf_http_request = -1;
|
|
|
|
|
1999-11-16 11:44:20 +00:00
|
|
|
static gint ett_http = -1;
|
|
|
|
|
2000-04-08 07:07:42 +00:00
|
|
|
#define TCP_PORT_HTTP 80
|
|
|
|
#define TCP_PORT_PROXY_HTTP 3128
|
|
|
|
#define TCP_PORT_PROXY_ADMIN_HTTP 3132
|
|
|
|
#define TCP_ALT_PORT_HTTP 8080
|
|
|
|
|
2000-02-23 19:47:14 +00:00
|
|
|
static int is_http_request_or_reply(const u_char *data, int linelen, http_type_t *type);
|
1999-02-12 09:03:42 +00:00
|
|
|
|
2000-11-15 08:27:14 +00:00
|
|
|
static dissector_handle_t ipp_handle;
|
|
|
|
|
2000-11-09 10:56:33 +00:00
|
|
|
void
|
|
|
|
dissect_http(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
1999-02-12 09:03:42 +00:00
|
|
|
{
|
2000-11-09 10:56:33 +00:00
|
|
|
gboolean is_ipp = (pinfo->srcport == 631 || pinfo->destport == 631);
|
|
|
|
proto_tree *http_tree = NULL;
|
|
|
|
proto_item *ti = NULL;
|
|
|
|
gint offset = 0;
|
|
|
|
const u_char *line;
|
|
|
|
gint next_offset;
|
|
|
|
const u_char *linep, *lineend;
|
1999-02-12 09:03:42 +00:00
|
|
|
int linelen;
|
|
|
|
u_char c;
|
2000-11-09 10:56:33 +00:00
|
|
|
http_type_t http_type;
|
|
|
|
int datalen;
|
1999-02-12 09:03:42 +00:00
|
|
|
|
2000-11-09 10:56:33 +00:00
|
|
|
CHECK_DISPLAY_AS_DATA(proto_http, tvb, pinfo, tree);
|
Add the "Edit:Protocols..." feature which currently only implements
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
2000-08-13 14:09:15 +00:00
|
|
|
|
2000-11-15 08:27:14 +00:00
|
|
|
pinfo->current_proto = "HTTP";
|
1999-02-12 09:03:42 +00:00
|
|
|
|
2000-11-09 10:56:33 +00:00
|
|
|
if (check_col(pinfo->fd, COL_PROTOCOL))
|
2000-11-19 08:54:37 +00:00
|
|
|
col_set_str(pinfo->fd, COL_PROTOCOL, is_ipp ? "IPP" : "HTTP");
|
2000-11-09 10:56:33 +00:00
|
|
|
if (check_col(pinfo->fd, COL_INFO)) {
|
1999-02-12 09:03:42 +00:00
|
|
|
/*
|
2000-11-09 10:56:33 +00:00
|
|
|
* Put the first line from the buffer into the summary
|
2000-09-30 05:37:07 +00:00
|
|
|
* if it's an HTTP request or reply (but leave out the
|
2000-11-09 10:56:33 +00:00
|
|
|
* line terminator).
|
1999-02-12 09:03:42 +00:00
|
|
|
* Otherwise, just call it a continuation.
|
|
|
|
*/
|
2000-11-09 10:56:33 +00:00
|
|
|
linelen = tvb_find_line_end(tvb, offset, -1, &next_offset);
|
|
|
|
line = tvb_get_ptr(tvb, offset, linelen);
|
|
|
|
if (is_http_request_or_reply(line, linelen, &http_type))
|
|
|
|
col_add_str(pinfo->fd, COL_INFO,
|
|
|
|
format_text(line, linelen));
|
1999-02-12 09:03:42 +00:00
|
|
|
else
|
2000-11-19 08:54:37 +00:00
|
|
|
col_set_str(pinfo->fd, COL_INFO, "Continuation");
|
1999-02-12 09:03:42 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (tree) {
|
2000-11-09 10:56:33 +00:00
|
|
|
ti = proto_tree_add_item(tree, proto_http, tvb, offset,
|
|
|
|
tvb_length_remaining(tvb, offset), FALSE);
|
1999-11-16 11:44:20 +00:00
|
|
|
http_tree = proto_item_add_subtree(ti, ett_http);
|
1999-02-12 09:03:42 +00:00
|
|
|
|
2000-11-09 10:56:33 +00:00
|
|
|
/*
|
|
|
|
* Process the packet data, a line at a time.
|
|
|
|
*/
|
2000-11-13 08:58:17 +00:00
|
|
|
while (tvb_offset_exists(tvb, offset)) {
|
1999-02-12 09:03:42 +00:00
|
|
|
/*
|
|
|
|
* Find the end of the line.
|
|
|
|
*/
|
2000-11-09 10:56:33 +00:00
|
|
|
linelen = tvb_find_line_end(tvb, offset, -1,
|
|
|
|
&next_offset);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Get a buffer that refers to the line.
|
|
|
|
*/
|
|
|
|
line = tvb_get_ptr(tvb, offset, linelen);
|
|
|
|
lineend = line + linelen;
|
1999-02-12 09:03:42 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* OK, does it look like an HTTP request or
|
|
|
|
* response?
|
|
|
|
*/
|
2000-11-09 10:56:33 +00:00
|
|
|
if (is_http_request_or_reply(line, linelen, &http_type))
|
1999-02-12 09:03:42 +00:00
|
|
|
goto is_http;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* No. Does it look like a blank line (as would
|
|
|
|
* appear at the end of an HTTP request)?
|
|
|
|
*/
|
2000-11-09 10:56:33 +00:00
|
|
|
if (linelen == 0)
|
|
|
|
goto is_http;
|
1999-02-12 09:03:42 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* No. Does it look like a MIME header?
|
|
|
|
*/
|
2000-11-09 10:56:33 +00:00
|
|
|
linep = line;
|
1999-02-12 09:03:42 +00:00
|
|
|
while (linep < lineend) {
|
|
|
|
c = *linep++;
|
|
|
|
if (!isprint(c))
|
|
|
|
break; /* not printable, not a MIME header */
|
|
|
|
switch (c) {
|
|
|
|
|
|
|
|
case '(':
|
|
|
|
case ')':
|
|
|
|
case '<':
|
|
|
|
case '>':
|
|
|
|
case '@':
|
|
|
|
case ',':
|
|
|
|
case ';':
|
|
|
|
case '\\':
|
|
|
|
case '"':
|
|
|
|
case '/':
|
|
|
|
case '[':
|
|
|
|
case ']':
|
|
|
|
case '?':
|
|
|
|
case '=':
|
|
|
|
case '{':
|
|
|
|
case '}':
|
|
|
|
/*
|
|
|
|
* It's a tspecial, so it's not
|
|
|
|
* part of a token, so it's not
|
|
|
|
* a field name for the beginning
|
|
|
|
* of a MIME header.
|
|
|
|
*/
|
|
|
|
goto not_http;
|
|
|
|
|
|
|
|
case ':':
|
|
|
|
/*
|
|
|
|
* This ends the token; we consider
|
|
|
|
* this to be a MIME header.
|
|
|
|
*/
|
|
|
|
goto is_http;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
not_http:
|
|
|
|
/*
|
|
|
|
* We don't consider this part of an HTTP request or
|
|
|
|
* reply, so we don't display it.
|
|
|
|
* (Yeah, that means we don't display, say, a
|
|
|
|
* text/http page, but you can get that from the
|
|
|
|
* data pane.)
|
|
|
|
*/
|
|
|
|
break;
|
|
|
|
|
|
|
|
is_http:
|
|
|
|
/*
|
|
|
|
* Put this line.
|
|
|
|
*/
|
2000-11-09 10:56:33 +00:00
|
|
|
proto_tree_add_text(http_tree, tvb, offset,
|
|
|
|
next_offset - offset, "%s",
|
|
|
|
tvb_format_text(tvb, offset, next_offset - offset));
|
|
|
|
offset = next_offset;
|
1999-02-12 09:03:42 +00:00
|
|
|
}
|
|
|
|
|
2000-02-23 19:47:14 +00:00
|
|
|
switch (http_type) {
|
2000-02-23 20:55:33 +00:00
|
|
|
|
|
|
|
case HTTP_RESPONSE:
|
2000-05-31 05:09:07 +00:00
|
|
|
proto_tree_add_boolean_hidden(http_tree,
|
2000-11-09 10:56:33 +00:00
|
|
|
hf_http_response, tvb, 0, 0, 1);
|
2000-02-23 20:55:33 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case HTTP_REQUEST:
|
2000-05-31 05:09:07 +00:00
|
|
|
proto_tree_add_boolean_hidden(http_tree,
|
2000-11-09 10:56:33 +00:00
|
|
|
hf_http_request, tvb, 0, 0, 1);
|
2000-02-23 20:55:33 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case HTTP_OTHERS:
|
|
|
|
default:
|
|
|
|
break;
|
2000-02-23 19:47:14 +00:00
|
|
|
}
|
2000-11-09 10:56:33 +00:00
|
|
|
}
|
2000-02-23 19:47:14 +00:00
|
|
|
|
2000-11-09 10:56:33 +00:00
|
|
|
datalen = tvb_length_remaining(tvb, offset);
|
|
|
|
if (datalen > 0) {
|
|
|
|
if (is_ipp) {
|
2000-11-16 07:35:43 +00:00
|
|
|
tvbuff_t *new_tvb = tvb_new_subset(tvb, offset, -1, -1);
|
|
|
|
|
2000-11-09 10:56:33 +00:00
|
|
|
/*
|
|
|
|
* Fix up the top-level item so that it doesn't
|
|
|
|
* include the IPP stuff.
|
|
|
|
*/
|
|
|
|
if (ti != NULL)
|
|
|
|
proto_item_set_len(ti, offset);
|
|
|
|
|
2000-11-15 08:27:14 +00:00
|
|
|
call_dissector(ipp_handle, new_tvb, pinfo, tree);
|
2000-11-09 10:56:33 +00:00
|
|
|
} else
|
2000-11-16 07:35:43 +00:00
|
|
|
dissect_data(tvb, offset, pinfo, http_tree);
|
1999-02-12 09:03:42 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* XXX - this won't handle HTTP 0.9 replies, but they're all data
|
|
|
|
* anyway.
|
|
|
|
*/
|
|
|
|
static int
|
2000-02-23 19:47:14 +00:00
|
|
|
is_http_request_or_reply(const u_char *data, int linelen, http_type_t *type)
|
1999-02-12 09:03:42 +00:00
|
|
|
{
|
2000-10-19 07:38:01 +00:00
|
|
|
if (linelen >= 4) {
|
|
|
|
if (strncmp(data, "GET ", 4) == 0 ||
|
|
|
|
strncmp(data, "PUT ", 4) == 0) {
|
2000-02-23 20:55:33 +00:00
|
|
|
if (*type == HTTP_OTHERS)
|
|
|
|
*type = HTTP_REQUEST;
|
1999-02-12 09:03:42 +00:00
|
|
|
return TRUE;
|
1999-10-16 20:30:14 +00:00
|
|
|
}
|
1999-02-12 09:03:42 +00:00
|
|
|
}
|
2000-10-19 07:38:01 +00:00
|
|
|
if (linelen >= 5) {
|
|
|
|
if (strncmp(data, "HEAD ", 5) == 0 ||
|
|
|
|
strncmp(data, "POST ", 5) == 0) {
|
2000-02-23 20:55:33 +00:00
|
|
|
if (*type == HTTP_OTHERS)
|
|
|
|
*type = HTTP_REQUEST;
|
1999-02-12 09:03:42 +00:00
|
|
|
return TRUE;
|
1999-10-16 20:30:14 +00:00
|
|
|
}
|
2000-10-19 07:38:01 +00:00
|
|
|
if (strncmp(data, "HTTP/", 5) == 0) {
|
2000-02-23 20:55:33 +00:00
|
|
|
if (*type == HTTP_OTHERS)
|
|
|
|
*type = HTTP_RESPONSE;
|
1999-02-12 09:03:42 +00:00
|
|
|
return TRUE; /* response */
|
1999-10-16 20:30:14 +00:00
|
|
|
}
|
1999-02-12 09:03:42 +00:00
|
|
|
}
|
|
|
|
if (linelen >= 6) {
|
2000-10-19 07:38:01 +00:00
|
|
|
if (strncmp(data, "TRACE ", 6) == 0) {
|
2000-02-23 20:55:33 +00:00
|
|
|
if (*type == HTTP_OTHERS)
|
|
|
|
*type = HTTP_REQUEST;
|
1999-12-06 20:27:40 +00:00
|
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (linelen >= 7) {
|
2000-10-19 07:38:01 +00:00
|
|
|
if (strncmp(data, "DELETE ", 7) == 0) {
|
2000-02-23 20:55:33 +00:00
|
|
|
if (*type == HTTP_OTHERS)
|
|
|
|
*type = HTTP_REQUEST;
|
1999-02-12 09:03:42 +00:00
|
|
|
return TRUE;
|
1999-12-06 20:27:40 +00:00
|
|
|
}
|
1999-02-12 09:03:42 +00:00
|
|
|
}
|
2000-10-19 07:38:01 +00:00
|
|
|
if (linelen >= 8) {
|
|
|
|
if (strncmp(data, "OPTIONS ", 8) == 0 ||
|
|
|
|
strncmp(data, "CONNECT ", 8) == 0) {
|
2000-02-23 20:55:33 +00:00
|
|
|
if (*type == HTTP_OTHERS)
|
|
|
|
*type = HTTP_REQUEST;
|
1999-02-12 09:03:42 +00:00
|
|
|
return TRUE;
|
1999-12-06 20:27:40 +00:00
|
|
|
}
|
1999-02-12 09:03:42 +00:00
|
|
|
}
|
|
|
|
return FALSE;
|
|
|
|
}
|
1999-07-29 05:47:07 +00:00
|
|
|
|
|
|
|
void
|
|
|
|
proto_register_http(void)
|
|
|
|
{
|
2000-11-09 10:56:33 +00:00
|
|
|
static hf_register_info hf[] = {
|
|
|
|
{ &hf_http_response,
|
|
|
|
{ "Response", "http.response",
|
|
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
|
|
"TRUE if HTTP response" }},
|
|
|
|
{ &hf_http_request,
|
|
|
|
{ "Request", "http.request",
|
|
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
|
|
"TRUE if HTTP request" }},
|
|
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
|
|
&ett_http,
|
|
|
|
};
|
|
|
|
|
|
|
|
proto_http = proto_register_protocol("Hypertext Transfer Protocol",
|
|
|
|
"http");
|
|
|
|
proto_register_field_array(proto_http, hf, array_length(hf));
|
|
|
|
proto_register_subtree_array(ett, array_length(ett));
|
1999-07-29 05:47:07 +00:00
|
|
|
}
|
2000-04-08 07:07:42 +00:00
|
|
|
|
|
|
|
void
|
|
|
|
proto_reg_handoff_http(void)
|
|
|
|
{
|
2000-11-09 10:56:33 +00:00
|
|
|
dissector_add("tcp.port", TCP_PORT_HTTP, dissect_http);
|
|
|
|
dissector_add("tcp.port", TCP_ALT_PORT_HTTP, dissect_http);
|
|
|
|
dissector_add("tcp.port", TCP_PORT_PROXY_HTTP, dissect_http);
|
|
|
|
dissector_add("tcp.port", TCP_PORT_PROXY_ADMIN_HTTP, dissect_http);
|
2000-11-15 08:27:14 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Get a handle for the IPP dissector.
|
|
|
|
*/
|
|
|
|
ipp_handle = find_dissector("ipp");
|
2000-04-08 07:07:42 +00:00
|
|
|
}
|