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3976533f2c
Because packet length (length) >= capture length (caplen). (see the sanity checks in print.c, pretty_print_packet() function)
76 lines
2.4 KiB
C
76 lines
2.4 KiB
C
/*
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* Copyright (c) 2007
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* paolo.abeni@email.it All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by Paolo Abeni.''
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* The name of author may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/* \summary: Bluetooth printer */
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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 "netdissect-stdinc.h"
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#include "netdissect.h"
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#include "extract.h"
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#ifdef DLT_BLUETOOTH_HCI_H4_WITH_PHDR
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/*
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* Header prepended by libpcap to each bluetooth h4 frame;
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* the direction field is in network byte order.
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*/
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typedef struct _bluetooth_h4_header {
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nd_uint32_t direction; /* if first bit is set direction is incoming */
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} bluetooth_h4_header;
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#define BT_HDRLEN sizeof(bluetooth_h4_header)
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/*
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* This is the top level routine of the printer. 'p' points
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* to the bluetooth header of the packet, 'h->ts' is the timestamp,
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* 'h->len' is the length of the packet off the wire, and 'h->caplen'
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* is the number of bytes actually captured.
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*/
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u_int
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bt_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
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{
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u_int length = h->len;
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u_int caplen = h->caplen;
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const bluetooth_h4_header* hdr = (const bluetooth_h4_header*)p;
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ndo->ndo_protocol = "bt_if";
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if (caplen < BT_HDRLEN)
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goto trunc;
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caplen -= BT_HDRLEN;
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length -= BT_HDRLEN;
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p += BT_HDRLEN;
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ND_TCHECK_4(&hdr->direction);
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if (ndo->ndo_eflag)
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ND_PRINT("hci length %u, direction %s, ", length,
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(EXTRACT_BE_U_4(hdr->direction)&0x1) ? "in" : "out");
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if (!ndo->ndo_suppress_default_print)
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ND_DEFAULTPRINT(p, caplen);
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return (BT_HDRLEN);
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trunc:
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nd_print_trunc(ndo);
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return (BT_HDRLEN);
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}
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#endif
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