6 * Copyright (c) 2011 by Martin Warnes <Martin_Warnes@uk.ibm.com>
8 * Based on toshiba.c and vms.c
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version 2
13 * of the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
26 * This module will read the contents of the iSeries (OS/400) Communication trace
27 * Both ASCII & Unicode formatted traces are supported.
29 * iSeries Comms traces consist of a header page and a subsequent number of packet records
31 * The header page contains details on the options set during running of the trace,
32 * currently the following options are a requirement for this module:
34 * 1. Object protocol = ETHERNET (Default)
35 * 2. ASCII or UNICODE file formats.
37 * The above can be acheived by passing option ASCII(*YES) with the trace command
41 /* iSeries header page
43 COMMUNICATIONS TRACE Title: OS400 - OS400 trace 10/28/05 11:44:50 Page: 1
44 Trace Description . . . . . : OS400 - OS400 trace
45 Configuration object . . . . : ETH0
46 Type . . . . . . . . . . . . : 1 1=Line, 2=Network Interface
48 Object protocol . . . . . . : ETHERNET
49 Start date/Time . . . . . . : 10/28/05 11:43:00.341
50 End date/Time . . . . . . . : 10/28/05 11:44:22.148
51 Bytes collected . . . . . . : 11999
52 Buffer size . . . . . . . . : 2048 kilobytes
53 Data direction . . . . . . . : 3 1=Sent, 2=Received, 3=Both
54 Stop on buffer full . . . . : Y Y=Yes, N=No
55 Number of bytes to trace
56 Beginning bytes . . . . . : *MAX Value, *CALC, *MAX
57 Ending bytes . . . . . . : *CALC Value, *CALC
58 Controller name . . . . . . : *ALL *ALL, name
59 Data representation . . . . : 1 1=ASCII, 2=EBCDIC, 3=*CALC
60 Format SNA data only . . . . : N Y=Yes, N=No
61 Format RR, RNR commands . . : N Y=Yes, N=No
62 Format TCP/IP data only . . : Y Y=Yes, N=No
63 IP address . . . . . . . . : *ALL *ALL, address
64 IP address . . . . . . . . : *ALL *ALL, address
65 IP port . . . . . . . . . : *ALL *ALL, IP port
66 Format UI data only . . . . : N Y=Yes, N=No
67 Select Ethernet data . . . . : 3 1=802.3, 2=ETHV2, 3=Both
68 Format Broadcast data . . . : Y Y=Yes, N=No
71 /* iSeries IPv4 formatted packet records consist of a packet header line
72 * identifying the packet number, direction, size, timestamp,
73 * source/destination MAC addresses and packet type.
75 * Thereafter there will be a formated display of the headers above
76 * the link layer, such as ARP, IP, TCP, UDP, and ICMP (all but
77 * ICMP have either been seen in captures or on pages such as the ones
80 * http://www-912.ibm.com/s_dir/SLKBase.nsf/1ac66549a21402188625680b0002037e/e05fb0515bc3449686256ce600512c37?OpenDocument
84 * http://publib.boulder.ibm.com/infocenter/javasdk/v5r0/index.jsp?topic=%2Fcom.ibm.java.doc.diagnostics.50%2Fdiag%2Fproblem_determination%2Fi5os_perf_io_commstrace.html
86 * so we cannot assume that "IP Header" or "TCP Header" will appear). The
87 * formatted display includes lines that show the contents of some of the
88 * fields in the header, as well as hex strings dumps of the headers
89 * themselves, with tags such as "IP Header :", "ARP Header :",
90 * "TCP Header :", "UDP Header :", and (presumably) "ICMP Header:".
92 * If the packet contains data this is displayed as 4 groups of 16 hex digits
93 * followed by an ASCII representaion of the data line.
95 * Information from the packet header line, higher-level headers and, if
96 * available, data lines are extracted by the module for displaying.
99 Record Data Record Controller Destination Source Frame
100 Number S/R Length Timer Name MAC Address MAC Address Format
101 ------ --- ------ --------------- ---------- ------------ ------------ ------
102 8 S 145 11:43:59.82956 0006299C14AE 0006299C14FE ETHV2 Type: 0800
103 Frame Type : IP DSCP: 0 ECN: 00-NECT Length: 145 Protocol: TCP Datagram ID: 388B
104 Src Addr: 10.20.144.150 Dest Addr: 10.20.144.151 Fragment Flags: DON'T,LAST
105 IP Header : 45000091388B40004006CC860A1490960A149097
107 TCP . . . : Src Port: 6006,Unassigned Dest Port: 35366,Unassigned
108 SEQ Number: 2666470699 ('9EEF1D2B'X) ACK Number: 2142147535 ('7FAE93CF'X)
109 Code Bits: ACK PSH Window: 32648 TCP Option: NO OP
110 TCP Header : 17768A269EEF1D2B7FAE93CF80187F885B5600000101080A0517E0F805166DE0
111 Data . . . . . : 5443503200020010 0000004980000000 B800000080470103 01001E0000002000 *TCP2.......I*...*...*G........ .*
112 002F010080000004 0300800700C00600 4002008000000304 00800000060FB067 *./..*.....*..*..@..*.....*....*G*
113 FC276228786B3EB0 EF34F5F1D27EF8DF 20926820E7B322AA 739F1FB20D **'B(XK>**4***.** *H **"*S*.*. *
116 /* iSeries IPv6 formatted traces are similar to the IPv4 version above,
117 * except that the higher-level headers have "IPv6 Header:" and
118 * "ICMPv6 Hdr:", and data data is no longer output in groups of 16 hex
122 Record Data Record Destination Source Frame
123 Number S/R Length Timer MAC Address MAC Address Format
124 ------ --- ------ ------------ ------------ ------------ ------
125 218 S 1488 15:01:14.389 0011BC358680 00096B6BD918 ETHV2 Type: 86DD
126 IPv6 Data: Ver: 06 Traffic Class: 00 Flow Label: 000000
127 Payload Length: 1448 Next Header: 06,TCP Hop Limit: 64
128 Src Addr: fd00:0:0:20f2::122
129 Dest Addr: fd00:0:0:20a0::155
130 IPv6 Header: 6000000005A80640FD000000000020F20000000000000122FD000000000020A0
132 TCP . . . : Src Port: 21246,Unassigned Dest Port: 13601,Unassigned
133 SEQ Number: 2282300877 ('880925CD'X) ACK Number: 3259003715 ('C2407343'X)
134 Code Bits: ACK Window: 65535 TCP Option: NO OP
135 TCP Header : 52FE3521880925CDC24073438010FFFFCFBB00000101080A0E15127000237A08
136 Data . . . . . : 54435032000200140000061880000000ECBEB867F0000000004CE640E6C1D9D5 *TCP2........*...***g*....L*@*****
137 C9D5C740E3C8C9E240C9E240E3C8C540E6C1D9D5C9D5C740C6C9C5D3C4404040 ****@****@**@***@*******@*****@@@*
138 4040404040404040404040404040404040404040404040404040404040404040 *@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*
141 /* iSeries unformatted packet record consist of the same header record as
142 * the formatted trace but all other records are simply unformatted data
143 * containing higher-level headers and packet data combined.
145 Record Data Record Controller Destination Source Frame Number Number Poll/
146 Number S/R Length Timer Name MAC Address MAC Address Format Command Sent Received Final DSAP SSAP
147 ------ --- ------ --------------- ---------- ------------ ------------ ------ ------- ------ -------- ----- ---- ----
148 1 R 64 12:19:29.97108 000629ECF48E 0006D78E23C2 ETHV2 Type: 0800
149 Data . . . . . : 4500003C27954000 3A06CE3D9797440F 0A5964EAC4F50554 58C9915500000000 *E..<'*@.:.*=**D..YD***.TX**U....*
150 A00216D06A200000 020405B40402080A 1104B6C000000000 010303000B443BF1 **..*J .....*......**.........D;**
154 #include "wtap-int.h"
157 #include "file_wrappers.h"
165 #include <wsutil/str_util.h>
167 #define ISERIES_HDR_MAGIC_STR "COMMUNICATIONS TRACE"
168 #define ISERIES_HDR_MAGIC_LEN 20
169 #define ISERIES_LINE_LENGTH 270
170 #define ISERIES_HDR_LINES_TO_CHECK 100
171 #define ISERIES_PKT_LINES_TO_CHECK 4
172 #define ISERIES_MAX_PACKET_LEN 16384
173 #define ISERIES_MAX_TRACE_LEN 99999999
174 #define ISERIES_PKT_ALLOC_SIZE (pkt_len*2)+1
175 #define ISERIES_FORMAT_ASCII 1
176 #define ISERIES_FORMAT_UNICODE 2
179 gboolean have_date; /* TRUE if we found a capture start date */
180 int year, month, day; /* The start date */
181 int format; /* Trace format type */
184 static gboolean iseries_read (wtap * wth, int *err, gchar ** err_info,
185 gint64 *data_offset);
186 static gboolean iseries_seek_read (wtap * wth, gint64 seek_off,
187 struct wtap_pkthdr *phdr,
188 Buffer * buf, int *err, gchar ** err_info);
189 static gboolean iseries_check_file_type (wtap * wth, int *err, gchar **err_info,
191 static gint64 iseries_seek_next_packet (wtap * wth, int *err, gchar **err_info);
192 static gboolean iseries_parse_packet (wtap * wth, FILE_T fh,
193 struct wtap_pkthdr *phdr,
194 Buffer * buf, int *err, gchar ** err_info);
195 static int iseries_UNICODE_to_ASCII (guint8 * buf, guint bytes);
196 static gboolean iseries_parse_hex_string (const char * ascii, guint8 * buf,
200 iseries_open (wtap * wth, int *err, gchar ** err_info)
204 char magic[ISERIES_LINE_LENGTH];
205 char unicodemagic[] =
206 { '\x43', '\x00', '\x4F', '\x00', '\x4D',
207 '\x00', '\x4D', '\x00', '\x55', '\x00', '\x4E', '\x00', '\x49', '\x00',
208 '\x43', '\x00', '\x41'
212 * Check that file starts with a valid iSeries COMMS TRACE header
213 * by scanning for it in the first line
215 errno = WTAP_ERR_CANT_READ;
216 bytes_read = file_read (&magic, sizeof magic, wth->fh);
217 if (bytes_read != sizeof magic)
219 *err = file_error (wth->fh, err_info);
220 if (*err != 0 && *err != WTAP_ERR_SHORT_READ)
226 * Check if this is a UNICODE formatted file by scanning for the magic string
229 while ((unsigned)offset < (ISERIES_LINE_LENGTH - (sizeof unicodemagic)))
231 if (memcmp (magic + offset, unicodemagic, sizeof unicodemagic) == 0) {
232 if (file_seek (wth->fh, 0, SEEK_SET, err) == -1)
237 * Do some basic sanity checking to ensure we can handle the
238 * contents of this trace
240 if (!iseries_check_file_type (wth, err, err_info, ISERIES_FORMAT_UNICODE))
248 wth->file_encap = WTAP_ENCAP_ETHERNET;
249 wth->file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_ISERIES;
250 wth->snapshot_length = 0;
251 wth->subtype_read = iseries_read;
252 wth->subtype_seek_read = iseries_seek_read;
253 wth->tsprecision = WTAP_FILE_TSPREC_USEC;
255 if (file_seek (wth->fh, 0, SEEK_SET, err) == -1)
265 * Check if this is a ASCII formatted file by scanning for the magic string
268 while (offset < (ISERIES_LINE_LENGTH - ISERIES_HDR_MAGIC_LEN))
270 if (memcmp (magic + offset, ISERIES_HDR_MAGIC_STR, ISERIES_HDR_MAGIC_LEN) == 0)
272 if (file_seek (wth->fh, 0, SEEK_SET, err) == -1)
277 * Do some basic sanity checking to ensure we can handle the
278 * contents of this trace
280 if (!iseries_check_file_type (wth, err, err_info, ISERIES_FORMAT_ASCII))
288 wth->file_encap = WTAP_ENCAP_ETHERNET;
289 wth->file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_ISERIES;
290 wth->snapshot_length = 0;
291 wth->subtype_read = iseries_read;
292 wth->subtype_seek_read = iseries_seek_read;
293 wth->tsprecision = WTAP_FILE_TSPREC_USEC;
295 if (file_seek (wth->fh, 0, SEEK_SET, err) == -1)
304 /* Neither ASCII or UNICODE so not supported */
309 * Do some basic sanity checking to ensure we can handle the
310 * contents of this trace by checking the header page for
311 * requisit requirements and additional information.
314 iseries_check_file_type (wtap * wth, int *err, gchar **err_info, int format)
317 int num_items_scanned;
318 char buf[ISERIES_LINE_LENGTH], protocol[9];
321 /* Save trace format for passing between packets */
322 iseries = (iseries_t *) g_malloc (sizeof (iseries_t));
323 wth->priv = (void *) iseries;
324 iseries->have_date = FALSE;
325 iseries->format = format;
327 for (line = 0; line < ISERIES_HDR_LINES_TO_CHECK; line++)
329 if (file_gets (buf, ISERIES_LINE_LENGTH, wth->fh) == NULL)
332 *err = file_error (wth->fh, err_info);
333 if (*err == WTAP_ERR_SHORT_READ)
339 * Check that we are dealing with an ETHERNET trace
341 if (iseries->format == ISERIES_FORMAT_UNICODE)
343 iseries_UNICODE_to_ASCII ((guint8 *)buf, ISERIES_LINE_LENGTH);
345 ascii_strup_inplace (buf);
346 num_items_scanned = sscanf (buf,
347 "%*[ \n\t]OBJECT PROTOCOL%*[ .:\n\t]%8s",
349 if (num_items_scanned == 1)
351 if (memcmp (protocol, "ETHERNET", 8) != 0)
356 * The header is the only place where the date part of the timestamp is held, so
357 * extract it here and store for all packets to access
359 num_items_scanned = sscanf (buf,
360 "%*[ \n\t]START DATE/TIME%*[ .:\n\t]%2d/%2d/%2d",
361 &iseries->month, &iseries->day,
363 if (num_items_scanned == 3)
365 iseries->have_date = TRUE;
373 * Find the next packet and parse it; called from wtap_read().
376 iseries_read (wtap * wth, int *err, gchar ** err_info, gint64 *data_offset)
381 * Locate the next packet
383 offset = iseries_seek_next_packet (wth, err, err_info);
386 *data_offset = offset;
389 * Parse the packet and extract the various fields
391 return iseries_parse_packet (wth, wth->fh, &wth->phdr, wth->frame_buffer,
396 * Seeks to the beginning of the next packet, and returns the
397 * byte offset. Returns -1 on failure or EOF; on EOF, sets
398 * *err to 0, and, on failure, sets *err to the error and *err_info
399 * to null or an additional error string.
402 iseries_seek_next_packet (wtap * wth, int *err, gchar **err_info)
404 iseries_t *iseries = (iseries_t *)wth->priv;
405 char buf[ISERIES_LINE_LENGTH],type[5];
406 int line, num_items_scanned;
410 for (line = 0; line < ISERIES_MAX_TRACE_LEN; line++)
412 if (file_gets (buf, ISERIES_LINE_LENGTH, wth->fh) == NULL)
415 *err = file_error (wth->fh, err_info);
418 /* Convert UNICODE to ASCII if required and determine */
419 /* the number of bytes to rewind to beginning of record. */
420 if (iseries->format == ISERIES_FORMAT_UNICODE)
422 /* buflen is #bytes to 1st 0x0A */
423 buflen = iseries_UNICODE_to_ASCII ((guint8 *) buf, ISERIES_LINE_LENGTH);
427 /* Else buflen is just length of the ASCII string */
428 buflen = (long) strlen (buf);
430 ascii_strup_inplace (buf);
431 /* If packet header found return the offset */
434 "%*[ \n\t]ETHV2%*[ .:\n\t]TYPE%*[ .:\n\t]%4s",type);
435 if (num_items_scanned == 1)
437 /* Rewind to beginning of line */
438 cur_off = file_tell (wth->fh);
441 *err = file_error (wth->fh, err_info);
444 if (file_seek (wth->fh, cur_off - buflen, SEEK_SET, err) == -1)
448 return cur_off - buflen;
452 *err = WTAP_ERR_BAD_FILE;
454 g_strdup_printf ("iseries: next packet header not found within %d lines",
455 ISERIES_MAX_TRACE_LEN);
460 * Read packets in random-access fashion
463 iseries_seek_read (wtap * wth, gint64 seek_off, struct wtap_pkthdr *phdr,
464 Buffer * buf, int *err, gchar ** err_info)
467 /* seek to packet location */
468 if (file_seek (wth->random_fh, seek_off - 1, SEEK_SET, err) == -1)
472 * Parse the packet and extract the various fields
474 return iseries_parse_packet (wth, wth->random_fh, phdr, buf,
479 append_hex_digits(char *ascii_buf, int ascii_offset, int max_offset,
480 char *data, int *err, gchar **err_info)
482 int in_offset, out_offset;
485 gboolean overflow = FALSE;
488 out_offset = ascii_offset;
492 * Process a block of up to 16 hex digits.
493 * The block is terminated early by an end-of-line indication (NUL,
494 * CR, or LF), by a space (which terminates the last block of the
495 * data we're processing), or by a "*", which introduces the ASCII representation
497 * All characters in the block must be upper-case hex digits;
498 * there might or might not be a space *after* a block, but, if so,
499 * that will be skipped over after the block is processed.
501 for (i = 0; i < 16; i++, in_offset++)
504 * If we see an end-of-line indication, or an early-end-of-block
505 * indication (space), we're done. (Only the last block ends
508 c = data[in_offset] & 0xFF;
509 if (c == '\0' || c == ' ' || c == '*' || c == '\r' || c == '\n')
513 if (!isxdigit(c) || islower(c))
516 * Not a hex digit, or a lower-case hex digit.
517 * Treat this as an indication that the line isn't a data
518 * line, so we just ignore it.
520 * XXX - do so only for continuation lines; treat non-hex-digit
521 * characters as errors for other lines?
523 return ascii_offset; /* pretend we appended nothing */
525 if (out_offset >= max_offset)
529 ascii_buf[out_offset] = c;
534 * Skip blanks, if any.
536 for (; (data[in_offset] & 0xFF) == ' '; in_offset++)
541 * If we processed an *odd* number of hex digits, report an error.
545 *err = WTAP_ERR_BAD_FILE;
546 *err_info = g_strdup("iseries: odd number of hex digits in a line");
551 *err = WTAP_ERR_BAD_FILE;
552 *err_info = g_strdup("iseries: more packet data than the packet length indicated");
558 /* Parses a packet. */
560 iseries_parse_packet (wtap * wth, FILE_T fh, struct wtap_pkthdr *phdr,
561 Buffer *buf, int *err, gchar **err_info)
563 iseries_t *iseries = (iseries_t *)wth->priv;
565 gboolean isValid, isCurrentPacket;
566 int num_items_scanned, line, pktline, buflen;
567 int pkt_len, pktnum, hr, min, sec;
568 char direction[2], destmac[13], srcmac[13], type[5], csec[9+1];
569 char data[ISERIES_LINE_LENGTH * 2];
576 * Check for packet headers in first 3 lines this should handle page breaks
577 * situations and the header lines output at each page throw and ensure we
578 * read both the captured and packet lengths.
581 for (line = 1; line < ISERIES_PKT_LINES_TO_CHECK; line++)
583 if (file_gets (data, ISERIES_LINE_LENGTH, fh) == NULL)
585 *err = file_error (fh, err_info);
588 /* Convert UNICODE data to ASCII */
589 if (iseries->format == ISERIES_FORMAT_UNICODE)
591 iseries_UNICODE_to_ASCII ((guint8 *)data, ISERIES_LINE_LENGTH);
593 ascii_strup_inplace (data);
596 "%*[ \n\t]%6d%*[ *\n\t]%1s%*[ \n\t]%6d%*[ \n\t]%2d:%2d:%2d.%9[0-9]%*[ \n\t]"
597 "%12s%*[ \n\t]%12s%*[ \n\t]ETHV2%*[ \n\t]TYPE:%*[ \n\t]%4s",
598 &pktnum, direction, &pkt_len, &hr, &min, &sec, csec, destmac,
600 if (num_items_scanned == 10)
602 /* OK! We found the packet header line */
605 * XXX - The Capture length returned by the iSeries trace doesn't
606 * seem to include the Ethernet header, so we add its length here.
614 * If no packet header found we exit at this point and inform the user.
618 *err = WTAP_ERR_BAD_FILE;
619 *err_info = g_strdup ("iseries: packet header isn't valid");
623 phdr->presence_flags = WTAP_HAS_CAP_LEN;
626 * If we have Wiretap Header then populate it here
628 * Timer resolution on the iSeries is hardware dependent. We determine
629 * the resolution based on how many digits we see.
631 if (iseries->have_date)
633 phdr->presence_flags |= WTAP_HAS_TS;
634 tm.tm_year = 100 + iseries->year;
635 tm.tm_mon = iseries->month - 1;
636 tm.tm_mday = iseries->day;
641 phdr->ts.secs = mktime (&tm);
642 csec[sizeof(csec) - 1] = '\0';
643 switch (strlen(csec))
649 phdr->ts.nsecs = atoi(csec) * 100000000;
652 phdr->ts.nsecs = atoi(csec) * 10000000;
655 phdr->ts.nsecs = atoi(csec) * 1000000;
658 phdr->ts.nsecs = atoi(csec) * 100000;
661 phdr->ts.nsecs = atoi(csec) * 10000;
664 phdr->ts.nsecs = atoi(csec) * 1000;
667 phdr->ts.nsecs = atoi(csec) * 100;
670 phdr->ts.nsecs = atoi(csec) * 10;
673 phdr->ts.nsecs = atoi(csec);
679 phdr->pkt_encap = WTAP_ENCAP_ETHERNET;
680 phdr->pseudo_header.eth.fcs_len = -1;
682 ascii_buf = (char *)g_malloc (ISERIES_PKT_ALLOC_SIZE);
683 g_snprintf(ascii_buf, ISERIES_PKT_ALLOC_SIZE, "%s%s%s", destmac, srcmac, type);
684 ascii_offset = 14*2; /* 14-byte Ethernet header, 2 characters per byte */
687 * Start reading packet contents
689 isCurrentPacket = TRUE;
691 /* loop through packet lines and breakout when the next packet header is read */
693 while (isCurrentPacket)
696 /* Read the next line */
697 if (file_gets (data, ISERIES_LINE_LENGTH, fh) == NULL)
699 *err = file_error (fh, err_info);
702 /* Hit the EOF without an error */
708 /* Convert UNICODE data to ASCII and determine line length */
709 if (iseries->format == ISERIES_FORMAT_UNICODE)
711 buflen = iseries_UNICODE_to_ASCII ((guint8 *)data, ISERIES_LINE_LENGTH);
715 /* Else bytes to rewind is just length of ASCII string */
716 buflen = (int) strlen (data);
720 * Skip leading white space.
722 for (offset = 0; isspace(data[offset]); offset++)
726 * The higher-level header information starts at an offset of
727 * 22 characters. The header tags are 14 characters long.
729 * XXX - for IPv6, if the next header isn't the last header,
730 * the intermediate headers do *NOT* appear to be shown in
731 * the dump file *at all*, so the packet *cannot* be
736 if (strncmp(data + 22, "IP Header : ", 14) == 0 ||
737 strncmp(data + 22, "IPv6 Header: ", 14) == 0 ||
738 strncmp(data + 22, "ARP Header : ", 14) == 0 ||
739 strncmp(data + 22, "TCP Header : ", 14) == 0 ||
740 strncmp(data + 22, "UDP Header : ", 14) == 0 ||
741 strncmp(data + 22, "ICMP Header: ", 14) == 0 ||
742 strncmp(data + 22, "ICMPv6 Hdr: ", 14) == 0 ||
743 strncmp(data + 22, "Option Hdr: ", 14) == 0)
745 ascii_offset = append_hex_digits(ascii_buf, ascii_offset,
746 ISERIES_PKT_ALLOC_SIZE - 1,
749 if (ascii_offset == -1)
759 * Is this a data line?
761 * The "Data" starts at an offset of 8.
765 if (strncmp(data + 9, "Data . . . . . : ", 18) == 0)
767 ascii_offset = append_hex_digits(ascii_buf, ascii_offset,
768 ISERIES_PKT_ALLOC_SIZE - 1,
771 if (ascii_offset == -1)
781 * Is this a continuation of a previous header or data line?
782 * That's blanks followed by hex digits; first try the
783 * "no column separators" form.
785 * Continuations of header lines begin at an offset of 36;
786 * continuations of data lines begin at an offset of 27.
788 if (offset == 36 || offset == 27)
790 ascii_offset = append_hex_digits(ascii_buf, ascii_offset,
791 ISERIES_PKT_ALLOC_SIZE - 1,
794 if (ascii_offset == -1)
803 * If we see the identifier for the next packet then rewind and set
804 * isCurrentPacket FALSE
806 ascii_strup_inplace (data);
807 /* If packet header found return the offset */
810 "%*[ \n\t]ETHV2%*[ .:\n\t]TYPE%*[ .:\n\t]%4s",type);
811 if ((num_items_scanned == 1) && pktline > 1)
813 isCurrentPacket = FALSE;
814 cur_off = file_tell( fh);
818 *err = file_error (fh, err_info);
821 if (file_seek (fh, cur_off - buflen, SEEK_SET, err) == -1)
823 /* XXX: need to set err_info ?? */
828 ascii_buf[ascii_offset] = '\0';
831 * Make the captured length be the amount of bytes we've read (which
832 * is half the number of characters of hex dump we have).
834 * XXX - this can happen for IPv6 packets if the next header isn't the
837 phdr->caplen = ((guint32) strlen (ascii_buf))/2;
839 /* Make sure we have enough room for the packet. */
840 buffer_assure_space (buf, ISERIES_MAX_PACKET_LEN);
841 /* Convert ascii data to binary and return in the frame buffer */
842 iseries_parse_hex_string (ascii_buf, buffer_start_ptr (buf), strlen (ascii_buf));
844 /* free buffer allocs and return */
855 * Simple routine to convert an UNICODE buffer to ASCII
857 * XXX - This may be possible with iconv or similar
860 iseries_UNICODE_to_ASCII (guint8 * buf, guint bytes)
867 for (i = 0; i < bytes; i++)
886 * Simple routine to convert an ASCII hex string to binary data
887 * Requires ASCII hex data and buffer to populate with binary data
890 iseries_parse_hex_string (const char * ascii, guint8 * buf, size_t len)
898 for (i = 0; i < len; i++)
900 hexvalue = g_ascii_xdigit_value(ascii[i]);
903 return FALSE; /* not a valid hex digit */
904 bytevalue = (guint8)(hexvalue << 4);
906 return FALSE; /* only one hex digit of the byte is present */
907 hexvalue = g_ascii_xdigit_value(ascii[i]);
909 return FALSE; /* not a valid hex digit */
910 bytevalue |= (guint8) hexvalue;
911 buf[byte] = bytevalue;
918 * Editor modelines - http://www.wireshark.org/tools/modelines.html
923 * indent-tabs-mode: nil
926 * vi: set shiftwidth=2 tabstop=8 expandtab:
927 * :indentSize=2:tabSize=8:noTabs=true: