1 /* 2 * Copyright (c) 2007 3 * paolo.abeni@email.it All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that: (1) source code distributions 7 * retain the above copyright notice and this paragraph in its entirety, (2) 8 * distributions including binary code include the above copyright notice and 9 * this paragraph in its entirety in the documentation or other materials 10 * provided with the distribution, and (3) all advertising materials mentioning 11 * features or use of this software display the following acknowledgement: 12 * ``This product includes software developed by Paolo Abeni.'' 13 * The name of author may not be used to endorse or promote products derived 14 * from this software without specific prior written permission. 15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 16 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 17 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 18 */ 19 20 #include <sys/cdefs.h> 21 #ifndef lint 22 __RCSID("$NetBSD: print-bt.c,v 1.7 2023/08/17 20:19:40 christos Exp $"); 23 #endif 24 25 /* \summary: Bluetooth printer */ 26 27 #ifdef HAVE_CONFIG_H 28 #include <config.h> 29 #endif 30 31 #include "netdissect-stdinc.h" 32 33 #define ND_LONGJMP_FROM_TCHECK 34 #include "netdissect.h" 35 #include "extract.h" 36 37 #ifdef DLT_BLUETOOTH_HCI_H4_WITH_PHDR 38 39 /* 40 * Header prepended by libpcap to each bluetooth h4 frame; 41 * the direction field is in network byte order. 42 */ 43 typedef struct _bluetooth_h4_header { 44 nd_uint32_t direction; /* if first bit is set direction is incoming */ 45 } bluetooth_h4_header; 46 47 #define BT_HDRLEN sizeof(bluetooth_h4_header) 48 49 /* 50 * This is the top level routine of the printer. 'p' points 51 * to the bluetooth header of the packet, 'h->ts' is the timestamp, 52 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 53 * is the number of bytes actually captured. 54 */ 55 void 56 bt_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p) 57 { 58 u_int length = h->len; 59 u_int caplen = h->caplen; 60 const bluetooth_h4_header *hdr = (const bluetooth_h4_header *)p; 61 62 ndo->ndo_protocol = "bluetooth"; 63 nd_print_protocol(ndo); 64 ND_TCHECK_LEN(p, BT_HDRLEN); 65 ndo->ndo_ll_hdr_len += BT_HDRLEN; 66 caplen -= BT_HDRLEN; 67 length -= BT_HDRLEN; 68 p += BT_HDRLEN; 69 if (ndo->ndo_eflag) 70 ND_PRINT(", hci length %u, direction %s", length, 71 (GET_BE_U_4(hdr->direction)&0x1) ? "in" : "out"); 72 73 if (!ndo->ndo_suppress_default_print) 74 ND_DEFAULTPRINT(p, caplen); 75 } 76 #endif 77