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wireshark/epan/dissectors/packet-ajp13.c
Michael Mann 9b7fb8a811 Create the ability to have packet scoped "proto" data. Bug 9470 (https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=9470) 
I'm not sold on the name or module the proto_data functions live in, but I believe the function arguments are solid and gives us the most flexibility for the future.  And search/replace of a function name is easy enough to do.

The big driving force for getting this in sooner rather than later is the saved memory on ethernet packets (and IP packets soon), that used to have file_scope() proto data when all it needed was packet_scope() data (technically packet_info->pool scoped), strictly for Decode As.

All dissectors that use p_add_proto_data() only for Decode As functionality have been converted to using packet_scope().  All other dissectors were converted to using file_scope() which was the original scope for "proto" data.

svn path=/trunk/; revision=53520
2013-11-23 02:20:13 +00:00

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/* packet-ajp13.c
* Routines for AJP13 dissection
* Copyright 2002, Christopher K. St. John <cks@distributopia.com>
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <stdlib.h>
#include <glib.h>
#include <epan/packet.h>
#include <epan/wmem/wmem.h>
#include <epan/conversation.h>
#include "packet-tcp.h"
void proto_register_ajp13(void);
void proto_reg_handoff_ajp13(void);
/* IMPORTANT IMPLEMENTATION NOTES
*
* You need to be looking at:
*
* http://tomcat.apache.org/connectors-doc/ajp/ajpv13a.html
*
* If you're a wireshark dissector guru, then you can skip the rest of
* this. I'm writing it all down because I've written 3 dissectors so
* far and every time I've forgotten it all and had to re-learn it
* from scratch. Not this time, damnit.
*
* Dissector routines get called in two phases:
*
* The first phase is an in-order traversal of every incoming
* frame. Since we know it's in-order, we can set up a "conversational
* state" that records context-sensitive stuff like "was there a
* content-length in the previous request". During this first pass
* through the data, the "tree" parameter might be null, or not. For
* the regular gui-based Wireshark, it's null, which means we don't
* actually display the dissected data in the gui quite yet. For the
* text based interface, we might do the parsing and display both in
* this first pass.
*
* The second phase happens when the data is actually displayed. In
* this pase the "tree" param is non-null, so you've got a hook to
* hang the parsed-out display data on. Since there might be gigabytes
* worth of capture data, the display code only calls the dissector
* for the stuff the user actually clicks on. So you have to assume
* the dissector is getting called on random frames, you can't depend
* on ordering anymore.
*
* But some parts of the AJP13 capture stream are context sensitive.
* That's no big deal during the first in-order pass, but the second
* phase requires us to display any random frame correctly. So during
* the first in-order phase we create a per-frame user data structure
* and attach it to the frame using p_add_proto_data.
*
* Since AJP13 is a TCP/IP based protocol, writing a dissector for it
* requires addressing several other issues:
*
* 1) TCP/IP segments can get retransmitted or be sent out of
* order. Users don't normally care, because the low-level kernel
* networking code takes care of reassembling them properly. But we're
* looking at raw network packets, aren't we? The stuff on the
* wire. Wireshark has been getting better and better at helping
* dissectors with this. I'm a little fuzzy on the details, but my
* uderstanding is that wireshark now contains a fairly substantial
* user-space TCP/IP stack so it can re-assemble the data. But I might
* be wrong. Since AJP13 is going to be used either on the loopback
* interface or on a LAN, it isn't likely to be a big issues anyway.
*
* 2) AJP13 packets (PDU's or protocol data unit's in
* networking-speak) don't necessarily line up with TCP segments. That
* is, one TCP segment can have more than one AJP13 PDU, or one AJP13
* PDU can stretch across multiple TCP segments. Assembling them is
* obviously possible, but a royal pain. During the "phase one"
* in-order pass you have to keep track of a bunch of offsets and
* store which PDU goes with which TCP segment. Luckly, recent
* (0.9.4+) versions of wireshark provide the "tcp_dissect_pdus()"
* function that takes care of much of the work. See the comments in
* packet-tcp.c, the example code in packet-dns.c, or check the
* wireshark-dev archives for details.
*
* 3) Wireshark isn't guaranteed to see all the data. I'm a little
* unclear on all the possible failure modes, but it comes down to: a)
* Not your fault: it's an imperfect world, we're eavesdroppers, and
* stuff happens. We might totally miss packets or get garbled
* data. Or b) Totally your fault: you turn on the capture during the
* middle of an AJP13 conversation and the capture starts out with
* half an AJP13 PDU. This code doesn't currently handle either case
* very well, but you can get arbitrarily clever. Like: put in tests
* to see if this packet has reasonable field values, and if it
* doesn't, walk the offset ahead until we see a matching magic number
* field, then re-test. But we don't do that now, and since we're
* using tcp_dissect_pdu's, I'm not sure how to do it.
*
*/
#define MTYPE_FORWARD_REQUEST 2
#define MTYPE_SEND_BODY_CHUNK 3
#define MTYPE_SEND_HEADERS 4
#define MTYPE_END_RESPONSE 5
#define MTYPE_GET_BODY_CHUNK 6
#define MTYPE_SHUTDOWN 7
#define MTYPE_CPONG 9
#define MTYPE_CPING 10
static const value_string mtype_codes[] = {
{ MTYPE_FORWARD_REQUEST, "FORWARD REQUEST" },
{ MTYPE_SEND_BODY_CHUNK, "SEND BODY CHUNK" },
{ MTYPE_SEND_HEADERS, "SEND HEADERS" },
{ MTYPE_END_RESPONSE, "END RESPONSE" },
{ MTYPE_GET_BODY_CHUNK, "GET BODY CHUNK" },
{ MTYPE_SHUTDOWN, "SHUTDOWN" },
{ MTYPE_CPONG, "CPONG" },
{ MTYPE_CPING, "CPING" },
{ 0, NULL }
};
static const value_string http_method_codes[] = {
{ 1, "OPTIONS" },
{ 2, "GET" },
{ 3, "HEAD" },
{ 4, "POST" },
{ 5, "PUT" },
{ 6, "DELETE" },
{ 7, "TRACE" },
{ 8, "PROPFIND" },
{ 9, "PROPPATCH" },
{ 10, "MKCOL" },
{ 11, "COPY" },
{ 12, "MOVE" },
{ 13, "LOCK" },
{ 14, "UNLOCK" },
{ 15, "ACL" },
{ 16, "REPORT" },
{ 17, "VERSION-CONTROL" },
{ 18, "CHECKIN" },
{ 19, "CHECKOUT" },
{ 20, "UNCHECKOUT" },
{ 21, "SEARCH" },
{ 0, NULL }
};
static int proto_ajp13 = -1;
static int hf_ajp13_magic = -1;
static int hf_ajp13_len = -1;
static int hf_ajp13_code = -1;
static int hf_ajp13_method = -1;
static int hf_ajp13_ver = -1;
static int hf_ajp13_uri = -1;
static int hf_ajp13_raddr = -1;
static int hf_ajp13_rhost = -1;
static int hf_ajp13_srv = -1;
static int hf_ajp13_port = -1;
static int hf_ajp13_sslp = -1;
static int hf_ajp13_nhdr = -1;
/* response headers */
static int hf_ajp13_unknown_header = -1;
static int hf_ajp13_additional_header = -1;
static int hf_ajp13_content_type = -1;
static int hf_ajp13_content_language = -1;
static int hf_ajp13_content_length = -1;
static int hf_ajp13_date = -1;
static int hf_ajp13_last_modified = -1;
static int hf_ajp13_location = -1;
static int hf_ajp13_set_cookie = -1;
static int hf_ajp13_set_cookie2 = -1;
static int hf_ajp13_servlet_engine = -1;
static int hf_ajp13_status = -1;
static int hf_ajp13_www_authenticate = -1;
/* request headers */
static int hf_ajp13_accept = -1;
static int hf_ajp13_accept_charset = -1;
static int hf_ajp13_accept_encoding = -1;
static int hf_ajp13_accept_language = -1;
static int hf_ajp13_authorization = -1;
static int hf_ajp13_connection = -1;
/* content_type */
/* content_length */
static int hf_ajp13_cookie = -1;
static int hf_ajp13_cookie2 = -1;
static int hf_ajp13_host = -1;
static int hf_ajp13_pragma = -1;
static int hf_ajp13_referer = -1;
static int hf_ajp13_user_agent = -1;
/* request attributes */
static int hf_ajp13_unknown_attribute = -1;
static int hf_ajp13_req_attribute = -1;
static int hf_ajp13_context = -1;
static int hf_ajp13_servlet_path = -1;
static int hf_ajp13_remote_user = -1;
static int hf_ajp13_auth_type = -1;
static int hf_ajp13_query_string = -1;
static int hf_ajp13_route = -1;
static int hf_ajp13_ssl_cert = -1;
static int hf_ajp13_ssl_cipher = -1;
static int hf_ajp13_ssl_session = -1;
static int hf_ajp13_ssl_key_size = -1;
static int hf_ajp13_secret = -1;
static int hf_ajp13_stored_method = -1;
static int hf_ajp13_rlen = -1;
static int hf_ajp13_reusep = -1;
static int hf_ajp13_rstatus= -1;
static int hf_ajp13_rsmsg = -1;
static int hf_ajp13_data = -1;
static gint ett_ajp13 = -1;
/*
* Request/response header codes. Common headers are stored as ints in
* an effort to improve performance. Why can't we just have one big
* list?
*/
static const int* rsp_headers[] = {
&hf_ajp13_unknown_header,
&hf_ajp13_content_type,
&hf_ajp13_content_language,
&hf_ajp13_content_length,
&hf_ajp13_date,
&hf_ajp13_last_modified,
&hf_ajp13_location,
&hf_ajp13_set_cookie,
&hf_ajp13_set_cookie2,
&hf_ajp13_servlet_engine,
&hf_ajp13_status,
&hf_ajp13_www_authenticate
};
static const int* req_headers[] = {
&hf_ajp13_unknown_header,
&hf_ajp13_accept,
&hf_ajp13_accept_charset,
&hf_ajp13_accept_encoding,
&hf_ajp13_accept_language,
&hf_ajp13_authorization,
&hf_ajp13_connection,
&hf_ajp13_content_type,
&hf_ajp13_content_length,
&hf_ajp13_cookie,
&hf_ajp13_cookie2,
&hf_ajp13_host,
&hf_ajp13_pragma,
&hf_ajp13_referer,
&hf_ajp13_user_agent
};
static const int* req_attributes[] = {
&hf_ajp13_unknown_attribute,
&hf_ajp13_context,
&hf_ajp13_servlet_path,
&hf_ajp13_remote_user,
&hf_ajp13_auth_type,
&hf_ajp13_query_string,
&hf_ajp13_route,
&hf_ajp13_ssl_cert,
&hf_ajp13_ssl_cipher,
&hf_ajp13_ssl_session,
&hf_ajp13_req_attribute, /* 0x0A - name and value follows */
&hf_ajp13_ssl_key_size,
&hf_ajp13_secret,
&hf_ajp13_stored_method
};
typedef struct ajp13_conv_data {
int content_length;
gboolean was_get_body_chunk; /* XXX - not used */
} ajp13_conv_data;
typedef struct ajp13_frame_data {
gboolean is_request_body;
} ajp13_frame_data;
/* ajp13, in sort of a belt-and-suspenders move, encodes strings with
* both a leading length field, and a trailing null. Mostly, see
* ajpv13a.html. The returned length _includes_ the trailing null, if
* there is one.
*
* XXX - is there a tvbuff routine to handle this?
*/
static const gchar *
ajp13_get_nstring(tvbuff_t *tvb, gint offset, guint16* ret_len)
{
guint16 len;
len = tvb_get_ntohs(tvb, offset);
if (ret_len)
*ret_len = len+1;
/* a size of 0xFFFF indicates a null string - no data follows */
if (len == 0xFFFF)
len = 0;
return tvb_format_text(tvb, offset+2, MIN(len, ITEM_LABEL_LENGTH));
}
/* dissect a response. more work to do here.
*/
static void
display_rsp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *ajp13_tree, ajp13_conv_data* cd)
{
int pos = 0;
guint8 mcode = 0;
int i;
/* MAGIC
*/
if (ajp13_tree)
proto_tree_add_item(ajp13_tree, hf_ajp13_magic, tvb, pos, 2, ENC_NA);
pos+=2;
/* PDU LENGTH
*/
if (ajp13_tree)
proto_tree_add_item(ajp13_tree, hf_ajp13_len, tvb, pos, 2, ENC_BIG_ENDIAN);
pos+=2;
/* MESSAGE TYPE CODE
*/
mcode = tvb_get_guint8(tvb, pos);
col_append_str(pinfo->cinfo, COL_INFO, val_to_str(mcode, mtype_codes, "Unknown message code %u"));
if (ajp13_tree)
proto_tree_add_item(ajp13_tree, hf_ajp13_code, tvb, pos, 1, ENC_BIG_ENDIAN);
pos+=1;
switch (mcode) {
case MTYPE_END_RESPONSE:
if (ajp13_tree)
proto_tree_add_item(ajp13_tree, hf_ajp13_reusep, tvb, pos, 1, ENC_BIG_ENDIAN);
/*pos+=1;*/
break;
case MTYPE_SEND_HEADERS:
{
const gchar *rsmsg;
guint16 rsmsg_len;
guint16 nhdr;
guint16 rcode_num;
/* HTTP RESPONSE STATUS CODE
*/
rcode_num = tvb_get_ntohs(tvb, pos);
col_append_fstr(pinfo->cinfo, COL_INFO, ":%d", rcode_num);
if (ajp13_tree)
proto_tree_add_item(ajp13_tree, hf_ajp13_rstatus, tvb, pos, 2, ENC_BIG_ENDIAN);
pos+=2;
/* HTTP RESPONSE STATUS MESSAGE
*/
rsmsg = ajp13_get_nstring(tvb, pos, &rsmsg_len);
col_append_fstr(pinfo->cinfo, COL_INFO, " %s", rsmsg);
if (ajp13_tree)
proto_tree_add_string(ajp13_tree, hf_ajp13_rsmsg, tvb, pos, rsmsg_len+2, rsmsg);
pos+=rsmsg_len+2;
/* NUMBER OF HEADERS
*/
nhdr = tvb_get_ntohs(tvb, pos);
if (ajp13_tree)
proto_tree_add_item(ajp13_tree, hf_ajp13_nhdr, tvb, pos, 2, ENC_BIG_ENDIAN);
pos+=2;
/* HEADERS
*/
for(i=0; i<nhdr; i++) {
guint8 hcd;
guint8 hid;
const gchar *hval;
guint16 hval_len, hname_len;
const gchar* hname = NULL;
int hpos = pos;
/* int cl = 0; TODO: Content-Length header (encoded by 0x08) is special */
/* HEADER CODE/NAME
*/
hcd = tvb_get_guint8(tvb, pos);
if (hcd == 0xA0) {
pos+=1;
hid = tvb_get_guint8(tvb, pos);
pos+=1;
if (hid >= array_length(rsp_headers))
hid = 0;
hval = ajp13_get_nstring(tvb, pos, &hval_len);
proto_tree_add_string_format_value(ajp13_tree, *rsp_headers[hid],
tvb, hpos, 2+hval_len+2, hval,
"%s", hval);
pos+=hval_len+2;
#if 0
/* TODO: Content-Length header (encoded by 0x08) is special */
if (hid == 0x08)
cl = 1;
#endif
} else {
hname = ajp13_get_nstring(tvb, pos, &hname_len);
pos+=hname_len+2;
hval = ajp13_get_nstring(tvb, pos, &hval_len);
proto_tree_add_string_format(ajp13_tree, hf_ajp13_additional_header,
tvb, hpos, hname_len+2+hval_len+2,
wmem_strdup_printf(wmem_packet_scope(), "%s: %s", hname, hval),
"%s: %s", hname, hval);
pos+=hval_len+2;
}
}
break;
}
case MTYPE_GET_BODY_CHUNK:
{
guint16 rlen;
rlen = tvb_get_ntohs(tvb, pos);
cd->content_length = rlen;
if (ajp13_tree)
proto_tree_add_item(ajp13_tree, hf_ajp13_rlen, tvb, pos, 2, ENC_BIG_ENDIAN);
/*pos+=2;*/
break;
}
case MTYPE_CPONG:
break;
default:
/* MESSAGE DATA (COPOUT)
*/
if (ajp13_tree)
proto_tree_add_item(ajp13_tree, hf_ajp13_data, tvb, pos+2, -1, ENC_UTF_8|ENC_NA);
break;
}
}
/* dissect a request body. see AJPv13.html, but the idea is that these
* packets, unlike all other packets, have no type field. you just
* sort of have to know that they're coming based on the previous
* packets.
*/
static void
display_req_body(tvbuff_t *tvb, proto_tree *ajp13_tree, ajp13_conv_data* cd)
{
/*printf("ajp13:display_req_body()\n");*/
/*
* In a resued connection this is never reset.
*/
guint16 content_length;
guint16 packet_length;
int pos = 0;
/* MAGIC
*/
proto_tree_add_item(ajp13_tree, hf_ajp13_magic, tvb, pos, 2, ENC_NA);
pos+=2;
/* PACKET LENGTH
*/
packet_length = tvb_get_ntohs(tvb, pos);
proto_tree_add_item(ajp13_tree, hf_ajp13_len, tvb, pos, 2, ENC_BIG_ENDIAN);
pos+=2;
if (packet_length == 0)
{
/*
* We've got an empty packet:
* 0x12 0x34 0x00 0x00
* It signals that there is no more data in the body
*/
cd->content_length = 0;
return;
}
/* BODY (AS STRING)
*/
content_length = tvb_get_ntohs( tvb, pos);
if (content_length == 0) {
/* zero length content also signals no more body data */
cd->content_length = 0;
return;
}
cd->content_length -= content_length;
proto_tree_add_item(ajp13_tree, hf_ajp13_data, tvb, pos+2, content_length, ENC_UTF_8|ENC_NA);
}
/* note that even if ajp13_tree is null on the first pass, we still
* need to dissect the packet in order to determine if there is a
* content-length, and thus if there is a subsequent automatic
* request-body transmitted in the next request packet. if there is a
* content-length, we record the fact in the conversation context.
* ref the top of this file for comments explaining the multi-pass
* thing.
*/
static void
display_req_forward(tvbuff_t *tvb, packet_info *pinfo,
proto_tree *ajp13_tree,
ajp13_conv_data* cd)
{
int pos = 0;
guint8 meth;
guint8 cod;
const gchar *ver;
guint16 ver_len;
const gchar *uri;
guint16 uri_len;
const gchar *raddr;
guint16 raddr_len;
const gchar *rhost;
guint16 rhost_len;
const gchar *srv;
guint16 srv_len;
guint nhdr;
guint i;
if (ajp13_tree)
proto_tree_add_item(ajp13_tree, hf_ajp13_magic, tvb, pos, 2, ENC_NA);
pos+=2;
if (ajp13_tree)
proto_tree_add_item(ajp13_tree, hf_ajp13_len, tvb, pos, 2, ENC_BIG_ENDIAN);
pos+=2;
/* PACKET CODE
*/
cod = tvb_get_guint8(tvb, 4);
if (ajp13_tree)
proto_tree_add_item(ajp13_tree, hf_ajp13_code, tvb, pos, 1, ENC_BIG_ENDIAN);
pos+=1;
if ( cod == MTYPE_CPING ) {
col_append_str(pinfo->cinfo, COL_INFO, "CPING" );
return;
}
/* HTTP METHOD (ENCODED AS INTEGER)
*/
meth = tvb_get_guint8(tvb, pos);
col_append_str(pinfo->cinfo, COL_INFO, val_to_str(meth, http_method_codes, "Unknown method %u"));
if (ajp13_tree)
proto_tree_add_item(ajp13_tree, hf_ajp13_method, tvb, pos, 1, ENC_BIG_ENDIAN);
pos+=1;
/* HTTP VERSION STRING
*/
ver = ajp13_get_nstring(tvb, pos, &ver_len);
if (ajp13_tree)
proto_tree_add_string(ajp13_tree, hf_ajp13_ver, tvb, pos, ver_len+2, ver);
pos=pos+ver_len+2; /* skip over size + chars + trailing null */
/* URI
*/
uri = ajp13_get_nstring(tvb, pos, &uri_len);
if (ajp13_tree)
proto_tree_add_string(ajp13_tree, hf_ajp13_uri, tvb, pos, uri_len+2, uri);
pos=pos+uri_len+2; /* skip over size + chars + trailing null */
col_append_fstr(pinfo->cinfo, COL_INFO, " %s %s", uri, ver);
/* REMOTE ADDRESS
*/
raddr = ajp13_get_nstring(tvb, pos, &raddr_len);
if (ajp13_tree)
proto_tree_add_string(ajp13_tree, hf_ajp13_raddr, tvb, pos, raddr_len+2, raddr);
pos=pos+raddr_len+2; /* skip over size + chars + trailing null */
/* REMOTE HOST
*/
rhost = ajp13_get_nstring(tvb, pos, &rhost_len);
if (ajp13_tree)
proto_tree_add_string(ajp13_tree, hf_ajp13_rhost, tvb, pos, rhost_len+2, rhost);
pos=pos+rhost_len+2; /* skip over size + chars + trailing null */
/* SERVER NAME
*/
srv = ajp13_get_nstring(tvb, pos, &srv_len);
if (ajp13_tree)
proto_tree_add_string(ajp13_tree, hf_ajp13_srv, tvb, pos, srv_len+2, srv);
pos=pos+srv_len+2; /* skip over size + chars + trailing null */
/* SERVER PORT
*/
if (ajp13_tree)
proto_tree_add_item(ajp13_tree, hf_ajp13_port, tvb, pos, 2, ENC_BIG_ENDIAN);
pos+=2;
/* IS SSL?
*/
if (ajp13_tree)
proto_tree_add_item(ajp13_tree, hf_ajp13_sslp, tvb, pos, 1, ENC_NA);
pos+=1;
/* NUM HEADERS
*/
nhdr = tvb_get_ntohs(tvb, pos);
if (ajp13_tree)
proto_tree_add_item(ajp13_tree, hf_ajp13_nhdr, tvb, pos, 2, ENC_BIG_ENDIAN);
pos+=2;
cd->content_length = 0;
/* HEADERS
*/
for(i=0; i<nhdr; i++) {
guint8 hcd;
guint8 hid;
const gchar* hname = NULL;
int hpos = pos;
int cl = 0;
const gchar *hval;
guint16 hval_len, hname_len;
/* HEADER CODE/NAME
*/
hcd = tvb_get_guint8(tvb, pos);
if (hcd == 0xA0) {
pos+=1;
hid = tvb_get_guint8(tvb, pos);
pos+=1;
if (hid >= array_length(req_headers))
hid = 0;
hval = ajp13_get_nstring(tvb, pos, &hval_len);
proto_tree_add_string_format(ajp13_tree, *req_headers[hid],
tvb, hpos, 2+hval_len+2, hval,
"%s", hval);
pos+=hval_len+2;
if (hid == 0x08)
cl = 1;
} else {
hname = ajp13_get_nstring(tvb, pos, &hname_len);
pos+=hname_len+2;
hval = ajp13_get_nstring(tvb, pos, &hval_len);
proto_tree_add_string_format(ajp13_tree, hf_ajp13_additional_header,
tvb, hpos, hname_len+2+hval_len+2,
wmem_strdup_printf(wmem_packet_scope(), "%s: %s", hname, hval),
"%s: %s", hname, hval);
pos+=hval_len+2;
}
if (cl) {
cl = atoi(hval);
cd->content_length = cl;
}
}
/* ATTRIBUTES
*/
while(tvb_reported_length_remaining(tvb, pos) > 0) {
guint8 aid;
const gchar* aname = NULL;
const gchar* aval;
guint16 aval_len, aname_len;
int apos = pos;
/* ATTRIBUTE CODE/NAME
*/
aid = tvb_get_guint8(tvb, pos);
pos+=1;
if (aid == 0xFF) {
/* request terminator */
break;
}
if (aid == 0x0A) {
/* req_attribute - name and value follow */
aname = ajp13_get_nstring(tvb, pos, &aname_len);
pos+=aname_len+2;
aval = ajp13_get_nstring(tvb, pos, &aval_len);
pos+=aval_len+2;
proto_tree_add_string_format(ajp13_tree, hf_ajp13_req_attribute,
tvb, apos, 1+aname_len+2+aval_len+2,
wmem_strdup_printf(wmem_packet_scope(), "%s: %s", aname, aval),
"%s: %s", aname, aval);
} else if (aid == 0x0B ) {
/* ssl_key_length */
if (ajp13_tree) {
proto_tree_add_uint(ajp13_tree, hf_ajp13_ssl_key_size,
tvb, apos, 1+2, tvb_get_ntohs(tvb, pos));
}
pos+=2;
} else {
if (aid >= array_length(req_attributes))
aid = 0;
aval = ajp13_get_nstring(tvb, pos, &aval_len);
pos+=aval_len+2;
proto_tree_add_string_format(ajp13_tree, *req_attributes[aid],
tvb, apos, 1+aval_len+2, aval,
"%s", aval);
}
}
}
/* main dissector function. wireshark calls it for segments in both
* directions.
*/
static int
dissect_ajp13_tcp_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
guint16 mag;
/* guint16 len; */
conversation_t *conv = NULL;
ajp13_conv_data *cd = NULL;
proto_tree *ajp13_tree = NULL;
ajp13_frame_data* fd = NULL;
/* conversational state really only does us good during the first
* in-order traversal
*/
conv = find_or_create_conversation(pinfo);
cd = (ajp13_conv_data*)conversation_get_proto_data(conv, proto_ajp13);
if (!cd) {
cd = wmem_new(wmem_file_scope(), ajp13_conv_data);
cd->content_length = 0;
cd->was_get_body_chunk = FALSE;
conversation_add_proto_data(conv, proto_ajp13, cd);
}
/* we use the per segment user data to record the conversational
* state for use later on when we're called out of order (see
* comments at top of this file)
*/
fd = (ajp13_frame_data*)p_get_proto_data(wmem_file_scope(), pinfo, proto_ajp13, 0);
if (!fd) {
/*printf("ajp13:dissect_ajp13_common():no frame data, adding");*/
/* since there's no per-packet user data, this must be the first
* time we've see the packet, and it must be the first "in order"
* pass through the data.
*/
fd = wmem_new(wmem_file_scope(), ajp13_frame_data);
p_add_proto_data(wmem_file_scope(), pinfo, proto_ajp13, 0, fd);
fd->is_request_body = FALSE;
if (cd->content_length) {
/* this is screwy, see AJPv13.html. the idea is that if the
* request has a body (as determined by the content-length
* header), then there's always an immediate follow-up PDU with
* no GET_BODY_CHUNK from the container.
*/
fd->is_request_body = TRUE;
}
}
col_clear(pinfo->cinfo, COL_INFO);
mag = tvb_get_ntohs(tvb, 0);
/* len = tvb_get_ntohs(tvb, 2); */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "AJP13");
if (mag == 0x1234 && !fd->is_request_body)
col_append_fstr(pinfo->cinfo, COL_INFO, "%d:REQ:", conv->index);
else if (mag == 0x1234 && fd->is_request_body)
col_append_fstr(pinfo->cinfo, COL_INFO, "%d:REQ:Body", conv->index);
else if (mag == 0x4142)
col_append_fstr(pinfo->cinfo, COL_INFO, "%d:RSP:", conv->index);
else
col_set_str(pinfo->cinfo, COL_INFO, "AJP13 Error?");
if (tree) {
proto_item *ti;
ti = proto_tree_add_item(tree, proto_ajp13, tvb, 0, -1, ENC_NA);
ajp13_tree = proto_item_add_subtree(ti, ett_ajp13);
}
if (mag == 0x1234) {
if (fd->is_request_body)
display_req_body(tvb, ajp13_tree, cd);
else
display_req_forward(tvb, pinfo, ajp13_tree, cd);
} else if (mag == 0x4142) {
display_rsp(tvb, pinfo, ajp13_tree, cd);
}
return tvb_length(tvb);
}
/* given the first chunk of the AJP13 pdu, extract out and return the
* packet length. see comments in packet-tcp.c:tcp_dissect_pdus().
*/
static guint
get_ajp13_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset)
{
/*guint16 magic;*/
guint16 plen;
/*magic = tvb_get_ntohs(tvb, offset); */
plen = tvb_get_ntohs(tvb, offset+2);
plen += 4;
return plen;
}
/* Code to actually dissect the packets.
*/
static int
dissect_ajp13(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
{
/* Set up structures needed to add the protocol subtree and manage it
*/
tcp_dissect_pdus(tvb, pinfo, tree,
TRUE, /* desegment or not */
4, /* magic + length */
get_ajp13_pdu_len, /* use first 4, calc data len */
dissect_ajp13_tcp_pdu, data); /* the naive dissector */
return tvb_length(tvb);
}
void
proto_register_ajp13(void)
{
static hf_register_info hf[] = {
{ &hf_ajp13_magic,
{ "Magic", "ajp13.magic", FT_BYTES, BASE_NONE, NULL, 0x0, "Magic Number",
HFILL }
},
{ &hf_ajp13_len,
{ "Length", "ajp13.len", FT_UINT16, BASE_DEC, NULL, 0x0, "Data Length",
HFILL }
},
{ &hf_ajp13_code,
{ "Code", "ajp13.code", FT_UINT32, BASE_DEC, VALS(mtype_codes), 0x0, "Type Code",
HFILL }
},
{ &hf_ajp13_method,
{ "Method", "ajp13.method", FT_UINT8, BASE_DEC, VALS(http_method_codes), 0x0, "HTTP Method",
HFILL }
},
{ &hf_ajp13_ver,
{ "Version", "ajp13.ver", FT_STRING, BASE_NONE, NULL, 0x0, "HTTP Version",
HFILL }
},
{ &hf_ajp13_uri,
{ "URI", "ajp13.uri", FT_STRING, BASE_NONE, NULL, 0x0, "HTTP URI",
HFILL }
},
{ &hf_ajp13_raddr,
{ "RADDR", "ajp13.raddr", FT_STRING, BASE_NONE, NULL, 0x0, "Remote Address",
HFILL }
},
{ &hf_ajp13_rhost,
{ "RHOST", "ajp13.rhost", FT_STRING, BASE_NONE, NULL, 0x0, "Remote Host",
HFILL }
},
{ &hf_ajp13_srv,
{ "SRV", "ajp13.srv", FT_STRING, BASE_NONE, NULL, 0x0, "Server",
HFILL }
},
{ &hf_ajp13_port,
{ "PORT", "ajp13.port", FT_UINT16, BASE_DEC, NULL, 0x0, NULL,
HFILL }
},
{ &hf_ajp13_sslp,
{ "SSLP", "ajp13.sslp", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "Is SSL?",
HFILL }
},
{ &hf_ajp13_nhdr,
{ "NHDR", "ajp13.nhdr", FT_UINT16, BASE_DEC, NULL, 0x0, "Num Headers",
HFILL }
},
/* response headers */
{ &hf_ajp13_unknown_header,
{ "unknown_header", "ajp13.unknown_header", FT_STRING, BASE_NONE, NULL, 0x0, "Unknown Header Type",
HFILL }
},
{ &hf_ajp13_additional_header,
{ "additional_header", "ajp13.additional_header", FT_STRING, BASE_NONE, NULL, 0x0, "Additional Header Type",
HFILL }
},
{ &hf_ajp13_content_type,
{ "Content-Type", "ajp13.content_type", FT_STRING, BASE_NONE, NULL, 0x0, "Content-Type Header",
HFILL }
},
{ &hf_ajp13_content_language,
{ "Content-Language", "ajp13.content_language", FT_STRING, BASE_NONE, NULL, 0x0, "Content-Language Header",
HFILL }
},
{ &hf_ajp13_content_length,
{ "Content-Length", "ajp13.content_length", FT_STRING, BASE_NONE, NULL, 0x0, "Content-Length header",
HFILL }
},
{ &hf_ajp13_date,
{ "Date", "ajp13.date", FT_STRING, BASE_NONE, NULL, 0x0, "Date Header",
HFILL }
},
{ &hf_ajp13_last_modified,
{ "Last-Modified", "ajp13.last_modified", FT_STRING, BASE_NONE, NULL, 0x0, "Last Modified Header",
HFILL }
},
{ &hf_ajp13_location,
{ "Location", "ajp13.location", FT_STRING, BASE_NONE, NULL, 0x0, "Location Header",
HFILL }
},
{ &hf_ajp13_set_cookie,
{ "Set-Cookie", "ajp13.set_cookie", FT_STRING, BASE_NONE, NULL, 0x0, "Set-Cookie Header",
HFILL }
},
{ &hf_ajp13_set_cookie2,
{ "Set-Cookie2", "ajp13.set_cookie2", FT_STRING, BASE_NONE, NULL, 0x0, "Set-Cookie2 Header",
HFILL }
},
{ &hf_ajp13_servlet_engine,
{ "Servlet-Engine", "ajp13.servlet_engine", FT_STRING, BASE_NONE, NULL, 0x0, "Servlet-Engine Header",
HFILL }
},
{ &hf_ajp13_status,
{ "Status", "ajp13.status", FT_STRING, BASE_NONE, NULL, 0x0, "Status Header",
HFILL }
},
{ &hf_ajp13_www_authenticate,
{ "WWW-Authenticate", "ajp13.www_authenticate", FT_STRING, BASE_NONE, NULL, 0x0, "WWW-Authenticate Header",
HFILL }
},
/* request headers */
{ &hf_ajp13_accept,
{ "Accept", "ajp13.accept", FT_STRING, BASE_NONE, NULL, 0x0, "Accept Header",
HFILL }
},
{ &hf_ajp13_accept_charset,
{ "Accept-Charset", "ajp13.accept_charset", FT_STRING, BASE_NONE, NULL, 0x0, "Accept-Charset Header",
HFILL }
},
{ &hf_ajp13_accept_encoding,
{ "Accept-Encoding", "ajp13.accept_encoding", FT_STRING, BASE_NONE, NULL, 0x0, "Accept-Encoding Header",
HFILL }
},
{ &hf_ajp13_accept_language,
{ "Accept-Language", "ajp13.accept_language", FT_STRING, BASE_NONE, NULL, 0x0, "Accept-Language Header",
HFILL }
},
{ &hf_ajp13_authorization,
{ "Authorization", "ajp13.authorization", FT_STRING, BASE_NONE, NULL, 0x0, "Authorization Header",
HFILL }
},
{ &hf_ajp13_connection,
{ "Connection", "ajp13.connection", FT_STRING, BASE_NONE, NULL, 0x0, "Connection Header",
HFILL }
},
{ &hf_ajp13_cookie,
{ "Cookie", "ajp13.cookie", FT_STRING, BASE_NONE, NULL, 0x0, "Cookie Header",
HFILL }
},
{ &hf_ajp13_cookie2,
{ "Cookie2", "ajp13.cookie2", FT_STRING, BASE_NONE, NULL, 0x0, "Cookie2 Header",
HFILL }
},
{ &hf_ajp13_host,
{ "Host", "ajp13.host", FT_STRING, BASE_NONE, NULL, 0x0, "Host Header",
HFILL }
},
{ &hf_ajp13_pragma,
{ "Pragma", "ajp13.pragma", FT_STRING, BASE_NONE, NULL, 0x0, "Pragma Header",
HFILL }
},
{ &hf_ajp13_referer,
{ "Referer", "ajp13.referer", FT_STRING, BASE_NONE, NULL, 0x0, "Referer Header",
HFILL }
},
{ &hf_ajp13_user_agent,
{ "User-Agent", "ajp13.user_agent", FT_STRING, BASE_NONE, NULL, 0x0, "User-Agent Header",
HFILL }
},
/* request attributes */
{ &hf_ajp13_unknown_attribute,
{ "unknown_attribute", "ajp13.unknown_attribute", FT_STRING, BASE_NONE, NULL, 0x0, "Unknown Attribute Type",
HFILL }
},
{ &hf_ajp13_req_attribute,
{ "req_attribute", "ajp13.req_attribute", FT_STRING, BASE_NONE, NULL, 0x0, "Additional Attribute Type",
HFILL }
},
{ &hf_ajp13_context,
{ "Context", "ajp13.context", FT_STRING, BASE_NONE, NULL, 0x0, "Context Attribute",
HFILL }
},
{ &hf_ajp13_servlet_path,
{ "Servlet-Path", "ajp13.servlet_path", FT_STRING, BASE_NONE, NULL, 0x0, "Servlet-Path Attribute",
HFILL }
},
{ &hf_ajp13_remote_user,
{ "Remote-User", "ajp13.remote_user", FT_STRING, BASE_NONE, NULL, 0x0, "Remote-User Attribute",
HFILL }
},
{ &hf_ajp13_auth_type,
{ "Auth-Type", "ajp13.auth_type", FT_STRING, BASE_NONE, NULL, 0x0, "Auth-Type Attribute",
HFILL }
},
{ &hf_ajp13_query_string,
{ "Query-String", "ajp13.query_string", FT_STRING, BASE_NONE, NULL, 0x0, "Query-String Attribute",
HFILL }
},
{ &hf_ajp13_route,
{ "Route", "ajp13.route", FT_STRING, BASE_NONE, NULL, 0x0, "Route Attribute",
HFILL }
},
{ &hf_ajp13_ssl_cert,
{ "SSL-Cert", "ajp13.ssl_cert", FT_STRING, BASE_NONE, NULL, 0x0, "SSL-Cert Attribute",
HFILL }
},
{ &hf_ajp13_ssl_cipher,
{ "SSL-Cipher", "ajp13.ssl_cipher", FT_STRING, BASE_NONE, NULL, 0x0, "SSL-Cipher Attribute",
HFILL }
},
{ &hf_ajp13_ssl_session,
{ "SSL-Session", "ajp13.ssl_session", FT_STRING, BASE_NONE, NULL, 0x0, "SSL-Session Attribute",
HFILL }
},
{ &hf_ajp13_ssl_key_size,
{ "SSL-Key-Size", "ajp13.ssl_key_size", FT_UINT16, BASE_DEC, NULL, 0x0, "SSL-Key-Size Attribute",
HFILL }
},
{ &hf_ajp13_secret,
{ "Secret", "ajp13.secret", FT_STRING, BASE_NONE, NULL, 0x0, "Secret Attribute",
HFILL }
},
{ &hf_ajp13_stored_method,
{ "Stored-Method", "ajp13.stored_method", FT_STRING, BASE_NONE, NULL, 0x0, "Stored-Method Attribute",
HFILL }
},
{ &hf_ajp13_rlen,
{ "RLEN", "ajp13.rlen", FT_UINT16, BASE_DEC, NULL, 0x0, "Requested Length",
HFILL }
},
{ &hf_ajp13_reusep,
{ "REUSEP", "ajp13.reusep", FT_UINT8, BASE_DEC, NULL, 0x0, "Reuse Connection?",
HFILL }
},
{ &hf_ajp13_rstatus,
{ "RSTATUS", "ajp13.rstatus", FT_UINT16, BASE_DEC, NULL, 0x0, "HTTP Status Code",
HFILL }
},
{ &hf_ajp13_rsmsg,
{ "RSMSG", "ajp13.rmsg", FT_STRING, BASE_NONE, NULL, 0x0, "HTTP Status Message",
HFILL }
},
{ &hf_ajp13_data,
{ "Data", "ajp13.data", FT_STRING, BASE_NONE, NULL, 0x0, NULL,
HFILL }
},
};
static gint *ett[] = {
&ett_ajp13,
};
/* Register the protocol name and description
*/
proto_ajp13 = proto_register_protocol("Apache JServ Protocol v1.3", "AJP13", "ajp13");
proto_register_field_array(proto_ajp13, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_ajp13(void)
{
dissector_handle_t ajp13_handle;
ajp13_handle = new_create_dissector_handle(dissect_ajp13, proto_ajp13);
dissector_add_uint("tcp.port", 8009, ajp13_handle);
}
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