forked from osmocom/wireshark
1072 lines
37 KiB
C
1072 lines
37 KiB
C
/* iseries.c
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*
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* $Id$
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*
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* Wiretap Library
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* Copyright (c) 2011 by Martin Warnes <Martin_Warnes@uk.ibm.com>
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*
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* Based on toshiba.c and vms.c
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/*
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* This module will read the contents of the iSeries (OS/400) Communication trace
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* Both ASCII & Unicode formatted traces are supported.
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*
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* iSeries Comms traces consist of a header page and a subsequent number of packet records
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*
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* The header page contains details on the options set during running of the trace,
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* currently the following options are a requirement for this module:
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*
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* 1. Object protocol = ETHERNET (Default)
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* 2. ASCII or UNICODE file formats.
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*
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* The above can be acheived by passing option ASCII(*YES) with the trace command
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*
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*/
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/* iSeries header page
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COMMUNICATIONS TRACE Title: OS400 - OS400 trace 10/28/05 11:44:50 Page: 1
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Trace Description . . . . . : OS400 - OS400 trace
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Configuration object . . . . : ETH0
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Type . . . . . . . . . . . . : 1 1=Line, 2=Network Interface
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3=Network server
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Object protocol . . . . . . : ETHERNET
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Start date/Time . . . . . . : 10/28/05 11:43:00.341
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End date/Time . . . . . . . : 10/28/05 11:44:22.148
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Bytes collected . . . . . . : 11999
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Buffer size . . . . . . . . : 2048 kilobytes
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Data direction . . . . . . . : 3 1=Sent, 2=Received, 3=Both
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Stop on buffer full . . . . : Y Y=Yes, N=No
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Number of bytes to trace
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Beginning bytes . . . . . : *MAX Value, *CALC, *MAX
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Ending bytes . . . . . . : *CALC Value, *CALC
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Controller name . . . . . . : *ALL *ALL, name
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Data representation . . . . : 1 1=ASCII, 2=EBCDIC, 3=*CALC
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Format SNA data only . . . . : N Y=Yes, N=No
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Format RR, RNR commands . . : N Y=Yes, N=No
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Format TCP/IP data only . . : Y Y=Yes, N=No
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IP address . . . . . . . . : *ALL *ALL, address
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IP address . . . . . . . . : *ALL *ALL, address
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IP port . . . . . . . . . : *ALL *ALL, IP port
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Format UI data only . . . . : N Y=Yes, N=No
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Select Ethernet data . . . . : 3 1=802.3, 2=ETHV2, 3=Both
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Format Broadcast data . . . : Y Y=Yes, N=No
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*/
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/* iSeries IPv4 formatted packet records consist of a header line identifying the packet number,direction,size,
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* timestamp,source/destination MAC addresses and packet type.
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*
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* Thereafter there will be a formated display of the IP and TCP headers as well as a hex string dump
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* of the headers themselves displayed in the the "IP Header" and "TCP header" fields.
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*
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* If the packet contains data this is displayed as 4 groups of 16 hex digits followed by an ASCII
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* representaion of the data line.
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*
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* Information from the header line, IP header, TCP header and if available data lines are extracted
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* by the module for displaying.
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*
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*
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Record Data Record Controller Destination Source Frame
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Number S/R Length Timer Name MAC Address MAC Address Format
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------ --- ------ --------------- ---------- ------------ ------------ ------
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8 S 145 11:43:59.82956 0006299C14AE 0006299C14FE ETHV2 Type: 0800
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Frame Type : IP DSCP: 0 ECN: 00-NECT Length: 145 Protocol: TCP Datagram ID: 388B
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Src Addr: 10.20.144.150 Dest Addr: 10.20.144.151 Fragment Flags: DON'T,LAST
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IP Header : 45000091388B40004006CC860A1490960A149097
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IP Options : NONE
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TCP . . . : Src Port: 6006,Unassigned Dest Port: 35366,Unassigned
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SEQ Number: 2666470699 ('9EEF1D2B'X) ACK Number: 2142147535 ('7FAE93CF'X)
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Code Bits: ACK PSH Window: 32648 TCP Option: NO OP
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TCP Header : 17768A269EEF1D2B7FAE93CF80187F885B5600000101080A0517E0F805166DE0
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Data . . . . . : 5443503200020010 0000004980000000 B800000080470103 01001E0000002000 *TCP2.......I*...*...*G........ .*
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002F010080000004 0300800700C00600 4002008000000304 00800000060FB067 *./..*.....*..*..@..*.....*....*G*
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FC276228786B3EB0 EF34F5F1D27EF8DF 20926820E7B322AA 739F1FB20D **'B(XK>**4***.** *H **"*S*.*. *
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*/
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/* iSeries IPv6 formatted traces are similar to the IPv4 version above but data is no longer output as 4 hex sections
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*
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Record Data Record Destination Source Frame
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Number S/R Length Timer MAC Address MAC Address Format
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------ --- ------ ------------ ------------ ------------ ------
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218 S 1488 15:01:14.389 0011BC358680 00096B6BD918 ETHV2 Type: 86DD
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IPv6 Data: Ver: 06 Traffic Class: 00 Flow Label: 000000
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Payload Length: 1448 Next Header: 06,TCP Hop Limit: 64
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Src Addr: fd00:0:0:20f2::122
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Dest Addr: fd00:0:0:20a0::155
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IPv6 Header: 6000000005A80640FD000000000020F20000000000000122FD000000000020A0
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0000000000000155
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TCP . . . : Src Port: 21246,Unassigned Dest Port: 13601,Unassigned
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SEQ Number: 2282300877 ('880925CD'X) ACK Number: 3259003715 ('C2407343'X)
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Code Bits: ACK Window: 65535 TCP Option: NO OP
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TCP Header : 52FE3521880925CDC24073438010FFFFCFBB00000101080A0E15127000237A08
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Data . . . . . : 54435032000200140000061880000000ECBEB867F0000000004CE640E6C1D9D5 *TCP2........*...***g*....L*@*****
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C9D5C740E3C8C9E240C9E240E3C8C540E6C1D9D5C9D5C740C6C9C5D3C4404040 ****@****@**@***@*******@*****@@@*
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4040404040404040404040404040404040404040404040404040404040404040 *@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*
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*/
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/* iSeries unformatted packet record consist of the same header record as the formatted trace but all
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* other records are simply unformatted data containing IP, TCP and packet data combined.
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*
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Record Data Record Controller Destination Source Frame Number Number Poll/
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Number S/R Length Timer Name MAC Address MAC Address Format Command Sent Received Final DSAP SSAP
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------ --- ------ --------------- ---------- ------------ ------------ ------ ------- ------ -------- ----- ---- ----
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1 R 64 12:19:29.97108 000629ECF48E 0006D78E23C2 ETHV2 Type: 0800
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Data . . . . . : 4500003C27954000 3A06CE3D9797440F 0A5964EAC4F50554 58C9915500000000 *E..<'*@.:.*=**D..YD***.TX**U....*
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A00216D06A200000 020405B40402080A 1104B6C000000000 010303000B443BF1 **..*J .....*......**.........D;**
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "wtap-int.h"
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#include "buffer.h"
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#include "iseries.h"
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#include "file_wrappers.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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#include <wsutil/str_util.h>
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#define ISERIES_HDR_MAGIC_STR "COMMUNICATIONS TRACE"
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#define ISERIES_HDR_MAGIC_LEN 20
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#define ISERIES_LINE_LENGTH 270
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#define ISERIES_HDR_LINES_TO_CHECK 100
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#define ISERIES_PKT_LINES_TO_CHECK 4
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#define ISERIES_MAX_PACKET_LEN 16384
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#define ISERIES_MAX_TRACE_LEN 99999999
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#define ISERIES_PKT_ALLOC_SIZE (cap_len*2)+1
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#define ISERIES_FORMAT_ASCII 1
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#define ISERIES_FORMAT_UNICODE 2
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typedef struct {
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gboolean have_date; /* TRUE if we found a capture start date */
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int year, month, day; /* The start date */
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gboolean tcp_formatted; /* TCP/IP data formated Y/N */
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gboolean ipv6_trace; /* IPv4 or IPv6 */
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int format; /* Trace format type */
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} iseries_t;
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static gboolean iseries_read (wtap * wth, int *err, gchar ** err_info,
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gint64 *data_offset);
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static gboolean iseries_seek_read (wtap * wth, gint64 seek_off,
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union wtap_pseudo_header *pseudo_header,
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guint8 * pd, int len, int *err,
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gchar ** err_info);
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static gboolean iseries_check_file_type (wtap * wth, int *err, gchar **err_info,
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int format);
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static gint64 iseries_seek_next_packet (wtap * wth, int *err, gchar **err_info);
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static int iseries_parse_packet (wtap * wth, FILE_T fh,
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union wtap_pseudo_header *pseudo_header,
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guint8 * pd, int *err, gchar ** err_info);
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static int iseries_UNICODE_to_ASCII (guint8 * buf, guint bytes);
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static gboolean iseries_parse_hex_string (const char * ascii, guint8 * buf,
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int len);
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int
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iseries_open (wtap * wth, int *err, gchar ** err_info)
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{
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int bytes_read;
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gint offset;
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char magic[ISERIES_LINE_LENGTH];
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char unicodemagic[] =
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{ '\x43', '\x00', '\x4F', '\x00', '\x4D',
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'\x00', '\x4D', '\x00', '\x55', '\x00', '\x4E', '\x00', '\x49', '\x00',
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'\x43', '\x00', '\x41'
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};
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/*
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* Check that file starts with a valid iSeries COMMS TRACE header
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* by scanning for it in the first line
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*/
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errno = WTAP_ERR_CANT_READ;
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bytes_read = file_read (&magic, sizeof magic, wth->fh);
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if (bytes_read != sizeof magic)
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{
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*err = file_error (wth->fh, err_info);
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if (*err != 0)
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return -1;
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return 0;
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}
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/*
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* Check if this is a UNICODE formatted file by scanning for the magic string
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*/
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offset=0;
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while ((unsigned)offset < (ISERIES_LINE_LENGTH - (sizeof unicodemagic)))
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{
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if (memcmp (magic + offset, unicodemagic, sizeof unicodemagic) == 0) {
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if (file_seek (wth->fh, 0, SEEK_SET, err) == -1)
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{
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return 0;
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}
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/*
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* Do some basic sanity checking to ensure we can handle the
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* contents of this trace
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*/
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if (!iseries_check_file_type (wth, err, err_info, ISERIES_FORMAT_UNICODE))
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{
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if (*err == 0)
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return 0;
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else
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return -1;
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}
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wth->file_encap = WTAP_ENCAP_ETHERNET;
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wth->file_type = WTAP_FILE_ISERIES;
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wth->snapshot_length = 0;
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wth->subtype_read = iseries_read;
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wth->subtype_seek_read = iseries_seek_read;
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wth->tsprecision = WTAP_FILE_TSPREC_USEC;
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if (file_seek (wth->fh, 0, SEEK_SET, err) == -1)
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{
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return 0;
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}
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return 1;
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}
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offset += 1;
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}
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/*
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* Check if this is a ASCII formatted file by scanning for the magic string
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*/
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offset=0;
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while (offset < (ISERIES_LINE_LENGTH - ISERIES_HDR_MAGIC_LEN))
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{
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if (memcmp (magic + offset, ISERIES_HDR_MAGIC_STR, ISERIES_HDR_MAGIC_LEN) == 0)
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{
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if (file_seek (wth->fh, 0, SEEK_SET, err) == -1)
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{
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return 0;
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}
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/*
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* Do some basic sanity checking to ensure we can handle the
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* contents of this trace
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*/
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if (!iseries_check_file_type (wth, err, err_info, ISERIES_FORMAT_ASCII))
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{
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if (*err == 0)
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return 0;
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else
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return -1;
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}
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wth->file_encap = WTAP_ENCAP_ETHERNET;
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wth->file_type = WTAP_FILE_ISERIES;
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wth->snapshot_length = 0;
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wth->subtype_read = iseries_read;
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wth->subtype_seek_read = iseries_seek_read;
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wth->tsprecision = WTAP_FILE_TSPREC_USEC;
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if (file_seek (wth->fh, 0, SEEK_SET, err) == -1)
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{
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return 0;
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}
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return 1;
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}
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offset += 1;
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}
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/* Neither ASCII or UNICODE so not supported */
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return 0;
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}
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/*
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* Do some basic sanity checking to ensure we can handle the
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* contents of this trace by checking the header page for
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* requisit requirements and additional information.
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*/
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static gboolean
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iseries_check_file_type (wtap * wth, int *err, gchar **err_info, int format)
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{
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guint line;
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int num_items_scanned;
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char buf[ISERIES_LINE_LENGTH], protocol[9], type[5], work[2];
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iseries_t *iseries;
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/* Save trace format for passing between packets */
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iseries = (iseries_t *) g_malloc (sizeof (iseries_t));
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wth->priv = (void *) iseries;
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iseries->have_date = FALSE;
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iseries->format = format;
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iseries->tcp_formatted = FALSE;
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iseries->ipv6_trace = FALSE;
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for (line = 0; line < ISERIES_HDR_LINES_TO_CHECK; line++)
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{
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if (file_gets (buf, ISERIES_LINE_LENGTH, wth->fh) != NULL)
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{
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/*
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* Check that we are dealing with an ETHERNET trace
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*/
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if (iseries->format == ISERIES_FORMAT_UNICODE)
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{
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iseries_UNICODE_to_ASCII ((guint8 *)buf, ISERIES_LINE_LENGTH);
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}
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ascii_strup_inplace (buf);
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num_items_scanned = sscanf (buf,
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"%*[ \n\t]OBJECT PROTOCOL%*[ .:\n\t]%8s",
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protocol);
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if (num_items_scanned == 1)
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{
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if (memcmp (protocol, "ETHERNET", 8) != 0)
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return FALSE;
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}
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/*
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* The header is the only place where the date part of the timestamp is held, so
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* extract it here and store for all packets to access
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*/
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num_items_scanned = sscanf (buf,
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"%*[ \n\t]START DATE/TIME%*[ .:\n\t]%2d/%2d/%2d",
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&iseries->month, &iseries->day,
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&iseries->year);
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if (num_items_scanned == 3)
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{
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iseries->have_date = TRUE;
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}
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/*
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* Determine if this is a IPv4 or IPv6 trace
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*/
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num_items_scanned =
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sscanf (buf+78,
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"%*[ \n\t]ETHV2%*[ .:\n\t]TYPE%*[ .:\n\t]%4s", type);
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if (num_items_scanned == 1)
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{
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if (strncmp (type, "0800", 1) == 0)
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{
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iseries->ipv6_trace = FALSE;
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}
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if (strncmp (type, "86DD", 1) == 0)
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{
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iseries->ipv6_trace = TRUE;
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}
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}
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/*
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* Determine if the data has been formatted
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*/
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/* IPv6 formatted */
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num_items_scanned = sscanf (buf,
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"%*[ \n\t]IPV6 HEADER%1s",
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work);
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if (num_items_scanned == 1)
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{
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iseries->tcp_formatted = TRUE;
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return TRUE;
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}
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/* IPv4 formatted */
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num_items_scanned = sscanf (buf,
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"%*[ \n\t]IP HEADER %1s",
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work);
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if (num_items_scanned == 1)
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{
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iseries->tcp_formatted = TRUE;
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return TRUE;
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}
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}
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else
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{
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/* EOF or error. */
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if (file_eof (wth->fh))
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*err = 0;
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else
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*err = file_error (wth->fh, err_info);
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return FALSE;
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}
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}
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*err = 0;
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return TRUE;
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}
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/*
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* Find the next packet and parse it; called from wtap_read().
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*/
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static gboolean
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iseries_read (wtap * wth, int *err, gchar ** err_info, gint64 *data_offset)
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{
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gint64 offset;
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int pkt_len;
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/*
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* Locate the next packet
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*/
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offset = iseries_seek_next_packet (wth, err, err_info);
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if (offset < 1)
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return FALSE;
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/*
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* Parse the packet and extract the various fields
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*/
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pkt_len =
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iseries_parse_packet (wth, wth->fh, &wth->pseudo_header, NULL, err,
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err_info);
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if (pkt_len == -1)
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return FALSE;
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*data_offset = offset;
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return TRUE;
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}
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/*
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* Seeks to the beginning of the next packet, and returns the
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* byte offset. Returns -1 on failure, and sets *err to the error
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* and *err_info to null or an additional error string.
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*/
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static gint64
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iseries_seek_next_packet (wtap * wth, int *err, gchar **err_info)
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{
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iseries_t *iseries = (iseries_t *)wth->priv;
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char buf[ISERIES_LINE_LENGTH],type[5];
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int line, num_items_scanned;
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gint64 cur_off;
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long buflen;
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|
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/*
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* Seeks to the beginning of the next packet, and returns the
|
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* byte offset. Returns -1 on failure, and sets *err to the error
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* and *err_info to null or an additional error string.
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*/
|
|
for (line = 0; line < ISERIES_MAX_TRACE_LEN; line++)
|
|
{
|
|
if (file_gets (buf, ISERIES_LINE_LENGTH, wth->fh) != NULL)
|
|
{
|
|
/* Convert UNICODE to ASCII if required and determine */
|
|
/* the number of bytes to rewind to beginning of record. */
|
|
if (iseries->format == ISERIES_FORMAT_UNICODE)
|
|
{
|
|
/* buflen is #bytes to 1st 0x0A */
|
|
buflen = iseries_UNICODE_to_ASCII ((guint8 *) buf, ISERIES_LINE_LENGTH);
|
|
}
|
|
else
|
|
{
|
|
/* Else buflen is just length of the ASCII string */
|
|
buflen = (long) strlen (buf);
|
|
}
|
|
ascii_strup_inplace (buf);
|
|
/* If packet header found return the offset */
|
|
num_items_scanned =
|
|
sscanf (buf+78,
|
|
"%*[ \n\t]ETHV2%*[ .:\n\t]TYPE%*[ .:\n\t]%4s",type);
|
|
if (num_items_scanned == 1)
|
|
{
|
|
/* Rewind to beginning of line */
|
|
cur_off = file_tell (wth->fh);
|
|
if (cur_off == -1)
|
|
{
|
|
*err = file_error (wth->fh, err_info);
|
|
return -1;
|
|
}
|
|
if (file_seek (wth->fh, cur_off - buflen, SEEK_SET, err) == -1)
|
|
{
|
|
return -1;
|
|
}
|
|
return cur_off - buflen;
|
|
}
|
|
}
|
|
/* Otherwise we got an error or reached EOF */
|
|
else
|
|
{
|
|
if (file_eof (wth->fh))
|
|
{
|
|
/* We got an EOF. */
|
|
*err = 0;
|
|
}
|
|
else
|
|
{
|
|
/* We got an error. */
|
|
*err = file_error (wth->fh, err_info);
|
|
}
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Read packets in random-access fashion
|
|
*/
|
|
static gboolean
|
|
iseries_seek_read (wtap * wth, gint64 seek_off,
|
|
union wtap_pseudo_header *pseudo_header, guint8 * pd,
|
|
int len, int *err, gchar ** err_info)
|
|
{
|
|
int pkt_len;
|
|
|
|
/* seek to packet location */
|
|
if (file_seek (wth->random_fh, seek_off - 1, SEEK_SET, err) == -1)
|
|
return FALSE;
|
|
|
|
/*
|
|
* Parse the packet and extract the various fields
|
|
*/
|
|
pkt_len = iseries_parse_packet (wth, wth->random_fh, pseudo_header, pd,
|
|
err, err_info);
|
|
|
|
if (pkt_len != len)
|
|
{
|
|
if (pkt_len != -1)
|
|
{
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info =
|
|
g_strdup_printf ("iseries: requested length %d doesn't match record length %d",
|
|
len, pkt_len);
|
|
}
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/* Parses a packet. */
|
|
static int
|
|
iseries_parse_packet (wtap * wth, FILE_T fh,
|
|
union wtap_pseudo_header *pseudo_header, guint8 *pd,
|
|
int *err, gchar **err_info)
|
|
{
|
|
iseries_t *iseries = (iseries_t *)wth->priv;
|
|
gint64 cur_off;
|
|
gboolean isValid, isCurrentPacket, IPread, TCPread, isDATA, isDataHandled;
|
|
int num_items_scanned, line, pktline, buflen;
|
|
guint32 pkt_len;
|
|
int cap_len, pktnum, hr, min, sec, csec;
|
|
char direction[2], destmac[13], srcmac[13], type[5];
|
|
char ipheader[41], tcpheader[81];
|
|
char hex1[17], hex2[17], hex3[17], hex4[17];
|
|
char data[ISERIES_LINE_LENGTH * 2];
|
|
guint8 *buf;
|
|
char *tcpdatabuf, *workbuf, *asciibuf;
|
|
struct tm tm;
|
|
|
|
/*
|
|
* Check for packet headers in first 3 lines this should handle page breaks
|
|
* situations and the header lines output at each page throw and ensure we
|
|
* read both the captured and packet lengths.
|
|
*/
|
|
isValid = FALSE;
|
|
for (line = 1; line < ISERIES_PKT_LINES_TO_CHECK; line++)
|
|
{
|
|
if (file_gets (data, ISERIES_LINE_LENGTH, fh) == NULL)
|
|
{
|
|
*err = file_error (fh, err_info);
|
|
if (*err == 0)
|
|
{
|
|
*err = WTAP_ERR_SHORT_READ;
|
|
}
|
|
return -1;
|
|
}
|
|
/* Convert UNICODE data to ASCII */
|
|
if (iseries->format == ISERIES_FORMAT_UNICODE)
|
|
{
|
|
iseries_UNICODE_to_ASCII ((guint8 *)data, ISERIES_LINE_LENGTH);
|
|
}
|
|
ascii_strup_inplace (data);
|
|
num_items_scanned =
|
|
sscanf (data,
|
|
"%*[ \n\t]%6d%*[ *\n\t]%1s%*[ \n\t]%6d%*[ \n\t]%2d:%2d:%2d.%9d%*[ \n\t]"
|
|
"%12s%*[ \n\t]%12s%*[ \n\t]ETHV2%*[ \n\t]TYPE:%*[ \n\t]%4s",
|
|
&pktnum, direction, &cap_len, &hr, &min, &sec, &csec, destmac,
|
|
srcmac, type);
|
|
if (num_items_scanned == 10)
|
|
{
|
|
/* OK! We found the packet header line */
|
|
isValid = TRUE;
|
|
/*
|
|
* XXX - The Capture length returned by the iSeries trace doesn't seem to include the src/dest MAC
|
|
* addresses or the packet type. So we add them here.
|
|
*/
|
|
cap_len += 14;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If no packet header found we exit at this point and inform the user.
|
|
*/
|
|
if (!isValid)
|
|
{
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup ("iseries: packet header isn't valid");
|
|
return -1;
|
|
}
|
|
|
|
wth->phdr.presence_flags = WTAP_HAS_CAP_LEN;
|
|
|
|
/*
|
|
* If we have Wiretap Header then populate it here
|
|
*
|
|
* XXX - Timer resolution on the iSeries is hardware dependant; the value for csec may be
|
|
* different on other platforms though all the traces I've seen seem to show resolution
|
|
* to Milliseconds (i.e HH:MM:SS.nnnnn) or Nanoseconds (i.e HH:MM:SS.nnnnnn)
|
|
*/
|
|
if (iseries->have_date)
|
|
{
|
|
wth->phdr.presence_flags |= WTAP_HAS_TS;
|
|
tm.tm_year = 100 + iseries->year;
|
|
tm.tm_mon = iseries->month - 1;
|
|
tm.tm_mday = iseries->day;
|
|
tm.tm_hour = hr;
|
|
tm.tm_min = min;
|
|
tm.tm_sec = sec;
|
|
tm.tm_isdst = -1;
|
|
wth->phdr.ts.secs = mktime (&tm);
|
|
/* Handle Millisecond precision for timer */
|
|
if (csec > 99999)
|
|
{
|
|
wth->phdr.ts.nsecs = csec * 1000;
|
|
}
|
|
/* Handle Nanosecond precision for timer */
|
|
else
|
|
{
|
|
wth->phdr.ts.nsecs = csec * 10000;
|
|
}
|
|
}
|
|
|
|
wth->phdr.caplen = cap_len;
|
|
wth->phdr.pkt_encap = WTAP_ENCAP_ETHERNET;
|
|
pseudo_header->eth.fcs_len = -1;
|
|
|
|
/*
|
|
* Start Reading packet contents
|
|
*/
|
|
isCurrentPacket = TRUE;
|
|
IPread = FALSE;
|
|
TCPread = FALSE;
|
|
isDATA = FALSE;
|
|
|
|
/*
|
|
* Allocate 2 work buffers to handle concatentation of the hex data block
|
|
*/
|
|
tcpdatabuf = g_malloc (ISERIES_PKT_ALLOC_SIZE);
|
|
workbuf = g_malloc (ISERIES_PKT_ALLOC_SIZE);
|
|
tcpdatabuf[0] = '\0';
|
|
workbuf[0] = '\0';
|
|
|
|
/* loop through packet lines and breakout when the next packet header is read */
|
|
pktline = 0;
|
|
while (isCurrentPacket)
|
|
{
|
|
pktline++;
|
|
/* Read the next line */
|
|
if (file_gets (data, ISERIES_LINE_LENGTH, fh) == NULL)
|
|
{
|
|
if (file_eof (fh))
|
|
{
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
*err = file_error (fh, err_info);
|
|
if (*err == 0)
|
|
{
|
|
*err = WTAP_ERR_SHORT_READ;
|
|
}
|
|
goto errxit;
|
|
}
|
|
}
|
|
|
|
/* Convert UNICODE data to ASCII and determine line length */
|
|
if (iseries->format == ISERIES_FORMAT_UNICODE)
|
|
{
|
|
buflen = iseries_UNICODE_to_ASCII ((guint8 *)data, ISERIES_LINE_LENGTH);
|
|
}
|
|
else
|
|
{
|
|
/* Else bytes to rewind is just length of ASCII string */
|
|
buflen = (int) strlen (data);
|
|
}
|
|
|
|
/*
|
|
* Decode data for IPv4 traces and unformatted IPv6 traces
|
|
*/
|
|
if ((!iseries->ipv6_trace) || ((iseries->ipv6_trace) && (!iseries->tcp_formatted)))
|
|
{
|
|
/* If this is a IP header hex string then set flag */
|
|
num_items_scanned = sscanf (data + 22, "IP Header%*[ .:\n\t]%40s", ipheader);
|
|
if (num_items_scanned == 1)
|
|
{
|
|
IPread = TRUE;
|
|
}
|
|
|
|
/* If this is TCP header hex string then set flag */
|
|
num_items_scanned = sscanf (data + 22, "TCP Header%*[ .:\n\t]%80s", tcpheader);
|
|
if (num_items_scanned == 1)
|
|
{
|
|
TCPread = TRUE;
|
|
}
|
|
|
|
/*
|
|
* If there is data in the packet handle it here.
|
|
*
|
|
* The data header line will have the "Data . . " identifier, subsequent lines don't
|
|
*/
|
|
num_items_scanned =
|
|
sscanf (data + 27, "%16[A-F0-9] %16[A-F0-9] %16[A-F0-9] %16[A-F0-9]",
|
|
hex1, hex2, hex3, hex4);
|
|
if (num_items_scanned > 0)
|
|
{
|
|
isDATA = TRUE;
|
|
/*
|
|
* Scan the data line for data blocks, depending on the number of blocks scanned
|
|
* add them along with current tcpdata buffer to the work buffer and then copy
|
|
* work buffer to tcpdata buffer to continue building up tcpdata buffer to contain
|
|
* a single hex string.
|
|
*/
|
|
switch (num_items_scanned)
|
|
{
|
|
case 1:
|
|
g_snprintf (workbuf, ISERIES_PKT_ALLOC_SIZE, "%s%s", tcpdatabuf,
|
|
hex1);
|
|
break;
|
|
case 2:
|
|
g_snprintf (workbuf, ISERIES_PKT_ALLOC_SIZE, "%s%s%s",
|
|
tcpdatabuf, hex1, hex2);
|
|
break;
|
|
case 3:
|
|
g_snprintf (workbuf, ISERIES_PKT_ALLOC_SIZE, "%s%s%s%s",
|
|
tcpdatabuf, hex1, hex2, hex3);
|
|
break;
|
|
default:
|
|
g_snprintf (workbuf, ISERIES_PKT_ALLOC_SIZE, "%s%s%s%s%s",
|
|
tcpdatabuf, hex1, hex2, hex3, hex4);
|
|
}
|
|
memcpy (tcpdatabuf, workbuf, ISERIES_PKT_ALLOC_SIZE);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Decode data for IPv6 formatted traces
|
|
*/
|
|
if ((iseries->ipv6_trace) && (iseries->tcp_formatted))
|
|
{
|
|
/*
|
|
* If there are IPv6 headers in the packet handle it here.
|
|
*
|
|
* iSeries IPv6 headers are aligned after column 36 and appears as a single hex string
|
|
* of 16,32,48 or 64 bytes
|
|
*/
|
|
isDataHandled=FALSE;
|
|
num_items_scanned =
|
|
sscanf (data + 35, "%*[ \n\t]%16[A-F0-9]%16[A-F0-9]%16[A-F0-9]%16[A-F0-9]",
|
|
hex1, hex2, hex3, hex4);
|
|
if (num_items_scanned > 0)
|
|
{
|
|
isDATA = TRUE;
|
|
/*
|
|
* Scan the data line for data blocks, depending on the number of blocks scanned
|
|
* add them along with current tcpdata buffer to the work buffer and then copy
|
|
* work buffer to tcpdata buffer to continue building up tcpdata buffer to contain
|
|
* a single hex string.
|
|
*/
|
|
switch (num_items_scanned)
|
|
{
|
|
case 1:
|
|
if (strlen(hex1)==16)
|
|
{
|
|
g_snprintf (workbuf, ISERIES_PKT_ALLOC_SIZE, "%s%s", tcpdatabuf,
|
|
hex1);
|
|
isDataHandled=TRUE;
|
|
}
|
|
break;
|
|
case 2:
|
|
if ((strlen(hex1)==16) && (strlen(hex2)==16))
|
|
{
|
|
g_snprintf (workbuf, ISERIES_PKT_ALLOC_SIZE, "%s%s%s",
|
|
tcpdatabuf, hex1, hex2);
|
|
isDataHandled=TRUE;
|
|
}
|
|
break;
|
|
case 3:
|
|
if ((strlen(hex1)==16) && (strlen(hex2)==16) && (strlen(hex3)==16))
|
|
{
|
|
g_snprintf (workbuf, ISERIES_PKT_ALLOC_SIZE, "%s%s%s%s",
|
|
tcpdatabuf, hex1, hex2, hex3);
|
|
isDataHandled=TRUE;
|
|
}
|
|
break;
|
|
default:
|
|
if ((strlen(hex1)==16) && (strlen(hex2)==16) && (strlen(hex3)==16) && (strlen(hex4)==16))
|
|
{
|
|
g_snprintf (workbuf, ISERIES_PKT_ALLOC_SIZE, "%s%s%s%s%s",
|
|
tcpdatabuf, hex1, hex2, hex3, hex4);
|
|
isDataHandled=TRUE;
|
|
}
|
|
}
|
|
memcpy (tcpdatabuf, workbuf, ISERIES_PKT_ALLOC_SIZE);
|
|
}
|
|
/*
|
|
* If there is data in the packet handle it here.
|
|
*
|
|
* The data header line will have the "Data . . " identifier, subsequent lines don't
|
|
* Check to ensure we haven't already captured and used this data block already above
|
|
*/
|
|
num_items_scanned =
|
|
sscanf (data + 26, "%*[ \n\t]%16[A-F0-9]%16[A-F0-9]%16[A-F0-9]%16[A-F0-9]",
|
|
hex1, hex2, hex3, hex4);
|
|
if ((num_items_scanned > 0) && (isDataHandled==FALSE))
|
|
{
|
|
isDATA = TRUE;
|
|
/*
|
|
* Scan the data line for data blocks, depending on the number of blocks scanned
|
|
* add them along with current tcpdata buffer to the work buffer and then copy
|
|
* work buffer to tcpdata buffer to continue building up tcpdata buffer to contain
|
|
* a single hex string.
|
|
*/
|
|
switch (num_items_scanned)
|
|
{
|
|
case 1:
|
|
if (strlen(hex1)==16)
|
|
{
|
|
g_snprintf (workbuf, ISERIES_PKT_ALLOC_SIZE, "%s%s", tcpdatabuf,
|
|
hex1);
|
|
}
|
|
break;
|
|
case 2:
|
|
if ((strlen(hex1)==16) && (strlen(hex2)==16))
|
|
{
|
|
g_snprintf (workbuf, ISERIES_PKT_ALLOC_SIZE, "%s%s%s",
|
|
tcpdatabuf, hex1, hex2);
|
|
}
|
|
break;
|
|
case 3:
|
|
if ((strlen(hex1)==16) && (strlen(hex2)==16) && (strlen(hex3)==16))
|
|
{
|
|
g_snprintf (workbuf, ISERIES_PKT_ALLOC_SIZE, "%s%s%s%s",
|
|
tcpdatabuf, hex1, hex2, hex3);
|
|
}
|
|
break;
|
|
default:
|
|
if ((strlen(hex1)==16) && (strlen(hex2)==16) && (strlen(hex3)==16) && (strlen(hex4)==16))
|
|
{
|
|
g_snprintf (workbuf, ISERIES_PKT_ALLOC_SIZE, "%s%s%s%s%s",
|
|
tcpdatabuf, hex1, hex2, hex3, hex4);
|
|
}
|
|
}
|
|
memcpy (tcpdatabuf, workbuf, ISERIES_PKT_ALLOC_SIZE);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we see the identifier for the next packet then rewind and set
|
|
* isCurrentPacket FALSE
|
|
*/
|
|
ascii_strup_inplace (data);
|
|
/* If packet header found return the offset */
|
|
num_items_scanned =
|
|
sscanf (data+78,
|
|
"%*[ \n\t]ETHV2%*[ .:\n\t]TYPE%*[ .:\n\t]%4s",type);
|
|
if ((num_items_scanned == 1) && pktline > 1)
|
|
{
|
|
isCurrentPacket = FALSE;
|
|
cur_off = file_tell( fh);
|
|
if (cur_off == -1)
|
|
{
|
|
/* Error. */
|
|
*err = file_error (fh, err_info);
|
|
goto errxit;
|
|
}
|
|
if (file_seek (fh, cur_off - buflen, SEEK_SET, err) == -1)
|
|
{
|
|
/* XXX: need to set err_info ?? */
|
|
goto errxit;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* For a IPV4 formated trace ensure we have read at least the IP and TCP headers otherwise
|
|
* exit and pass error message to user.
|
|
*/
|
|
if ((iseries->tcp_formatted) && (iseries->ipv6_trace == FALSE))
|
|
{
|
|
if (!IPread)
|
|
{
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup ("iseries: IP header isn't valid");
|
|
goto errxit;
|
|
}
|
|
if (!TCPread)
|
|
{
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup ("iseries: TCP header isn't valid");
|
|
goto errxit;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Create a buffer to hold all the ASCII Hex data and populate with all the
|
|
* extracted data.
|
|
*/
|
|
asciibuf = g_malloc (ISERIES_PKT_ALLOC_SIZE);
|
|
if (isDATA)
|
|
{
|
|
/* packet contained data */
|
|
if ((iseries->tcp_formatted) && (iseries->ipv6_trace == FALSE))
|
|
{
|
|
/* build string for formatted fields */
|
|
g_snprintf (asciibuf, ISERIES_PKT_ALLOC_SIZE, "%s%s%s%s%s%s",
|
|
destmac, srcmac, type, ipheader, tcpheader, tcpdatabuf);
|
|
}
|
|
else
|
|
{
|
|
/* build string for unformatted data fields and IPV6 data*/
|
|
g_snprintf (asciibuf, ISERIES_PKT_ALLOC_SIZE, "%s%s%s%s", destmac,
|
|
srcmac, type, tcpdatabuf);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* No data in the packet */
|
|
g_snprintf (asciibuf, ISERIES_PKT_ALLOC_SIZE, "%s%s%s%s%s", destmac,
|
|
srcmac, type, ipheader, tcpheader);
|
|
}
|
|
|
|
/*
|
|
* Note: iSeries comms traces pad data blocks out with zeros
|
|
* Extract the packet length from the actual IP header; this may
|
|
* differ from the capture length reported by the formatted trace.
|
|
* IPv4 and IPv6 headers contain the length at different offsets so
|
|
* read from the correct location.
|
|
*/
|
|
if (!iseries->ipv6_trace)
|
|
{
|
|
sscanf (asciibuf + 32, "%4x", &pkt_len);
|
|
wth->phdr.len = pkt_len + 14;
|
|
}
|
|
else
|
|
{
|
|
sscanf (asciibuf + 36, "%4x", &pkt_len);
|
|
wth->phdr.len = pkt_len + 14;
|
|
}
|
|
if (wth->phdr.caplen > wth->phdr.len)
|
|
wth->phdr.len = wth->phdr.caplen;
|
|
|
|
/* Make sure we have enough room for the packet, only create buffer if none supplied */
|
|
if (pd == NULL)
|
|
{
|
|
buffer_assure_space (wth->frame_buffer, ISERIES_MAX_PACKET_LEN);
|
|
buf = buffer_start_ptr (wth->frame_buffer);
|
|
/* Convert ascii data to binary and return in the frame buffer */
|
|
iseries_parse_hex_string (asciibuf, buf, (int) strlen (asciibuf));
|
|
}
|
|
else
|
|
{
|
|
/* Convert ascii data to binary and return in the frame buffer */
|
|
iseries_parse_hex_string (asciibuf, pd, (int) strlen (asciibuf));
|
|
}
|
|
|
|
/* free buffer allocs and return */
|
|
*err = 0;
|
|
g_free (asciibuf);
|
|
g_free (tcpdatabuf);
|
|
g_free (workbuf);
|
|
return wth->phdr.len;
|
|
|
|
errxit:
|
|
g_free (tcpdatabuf);
|
|
g_free (workbuf);
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Simple routine to convert an UNICODE buffer to ASCII
|
|
*
|
|
* XXX - This may be possible with iconv or similar
|
|
*/
|
|
static int
|
|
iseries_UNICODE_to_ASCII (guint8 * buf, guint bytes)
|
|
{
|
|
guint i;
|
|
guint8 *bufptr;
|
|
|
|
bufptr = buf;
|
|
|
|
for (i = 0; i < bytes; i++)
|
|
{
|
|
switch (buf[i])
|
|
{
|
|
case 0xFE:
|
|
case 0xFF:
|
|
case 0x00:
|
|
break;
|
|
default:
|
|
*bufptr = buf[i];
|
|
bufptr++;
|
|
}
|
|
if (buf[i] == 0x0A)
|
|
return i;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
/*
|
|
* Simple routine to convert an ASCII hex string to binary data
|
|
* Requires ASCII hex data and buffer to populate with binary data
|
|
*/
|
|
static gboolean
|
|
iseries_parse_hex_string (const char * ascii, guint8 * buf, int len)
|
|
{
|
|
int i, byte;
|
|
gint hexvalue;
|
|
guint8 bytevalue;
|
|
|
|
byte = 0;
|
|
i = 0;
|
|
for (;;)
|
|
{
|
|
if (i >= len)
|
|
break;
|
|
hexvalue = g_ascii_xdigit_value(ascii[i]);
|
|
i++;
|
|
if (hexvalue == -1)
|
|
return FALSE; /* not a valid hex digit */
|
|
bytevalue = (guint8)(hexvalue << 4);
|
|
if (i >= len)
|
|
return FALSE; /* only one hex digit of the byte is present */
|
|
hexvalue = g_ascii_xdigit_value(ascii[i]);
|
|
i++;
|
|
if (hexvalue == -1)
|
|
return FALSE; /* not a valid hex digit */
|
|
bytevalue |= (guint8) hexvalue;
|
|
buf[byte] = bytevalue;
|
|
byte++;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 2
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=2 tabstop=8 expandtab:
|
|
* :indentSize=2:tabSize=8:noTabs=true:
|
|
*/
|