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152 lines
4.6 KiB
C
152 lines
4.6 KiB
C
/**
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null_analyze.c
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Copyright (C) 1999-2000 RTFM, Inc.
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All Rights Reserved
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This package is a SSLv3/TLS protocol analyzer written by Eric Rescorla
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<ekr@rtfm.com> and licensed by RTFM, Inc.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. All advertising materials mentioning features or use of this software
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must display the following acknowledgement:
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This product includes software developed by Eric Rescorla for
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RTFM, Inc.
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4. Neither the name of RTFM, Inc. nor the name of Eric Rescorla may be
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used to endorse or promote products derived from this
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software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY ERIC RESCORLA AND RTFM, INC. ``AS IS'' AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY SUCH
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DAMAGE.
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$Id: null_analyze.c,v 1.6 2001/11/26 22:28:16 ekr Exp $
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ekr@rtfm.com Thu Jan 7 22:58:27 1999
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*/
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#include <ctype.h>
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#include "network.h"
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#include "proto_mod.h"
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#include "debug.h"
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typedef struct null_analyzer_ {
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int num;
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} null_analyzer;
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static int create_null_analyzer PROTO_LIST((void *handle,
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proto_ctx *ctx,
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tcp_conn *conn,
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proto_obj **objp,
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struct sockaddr_storage *i_addr,
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u_short i_port,
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struct sockaddr_storage *r_addr,
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u_short r_port,
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struct timeval *base_time));
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static int create_null_analyzer(void *handle,
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proto_ctx *ctx,
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tcp_conn *conn,
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proto_obj **objp,
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struct sockaddr_storage *i_addr,
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u_short i_port,
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struct sockaddr_storage *r_addr,
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u_short r_port,
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struct timeval *base_time) {
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null_analyzer *obj = 0;
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static int ctr;
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if(!(obj = (null_analyzer *)calloc(1, sizeof(null_analyzer))))
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ERETURN(R_NO_MEMORY);
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obj->num = ctr++;
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DBG((0, "Creating analyzer for connection %d\n", obj->num));
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*objp = (proto_obj *)obj;
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return 0;
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}
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int destroy_null_analyzer(proto_obj **objp) {
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#ifdef DEBUG
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null_analyzer *obj;
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#endif
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if(!objp || !*objp)
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return 0;
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#ifdef DEBUG
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obj = (null_analyzer *)*objp;
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#endif
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DBG((0, "Destroying analyzer for connection %d\n", obj->num));
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free(*objp);
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*objp = 0;
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return 0;
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}
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int data_null_analyzer(proto_obj *_obj, segment *seg, int direction) {
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#ifdef DEBUG
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null_analyzer *obj = (null_analyzer *)_obj;
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#endif
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DBG((0, "Processing data for connection %d dir %d\n", obj->num, direction));
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for(; seg; seg = seg->next) {
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int i;
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for(i = 0; i < MIN(seg->len, 20); i++) {
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if(!isascii(seg->data[i]))
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break;
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}
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if(i < 20)
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xdump("NSEGMENT", seg->data, seg->len);
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else {
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printf("NSEGMENT: ");
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fwrite(seg->data, 1, seg->len, stdout);
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}
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printf("====\n");
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}
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return 0;
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}
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int fin_null_analyzer(proto_obj *_obj, packet *p, int direction) {
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#ifdef DEBUG
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null_analyzer *obj = (null_analyzer *)_obj;
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#endif
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DBG((0, "Received FIN on connection %d\n", obj->num));
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return 0;
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}
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static struct proto_mod_vtbl_ null_vtbl = {
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0,
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0,
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0,
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create_null_analyzer,
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0,
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destroy_null_analyzer,
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data_null_analyzer,
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fin_null_analyzer,
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};
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struct proto_mod_ null_mod = {0, &null_vtbl};
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