/* wtap.h * * $Id: wtap.h,v 1.35 1999/08/28 01:19:45 guy Exp $ * * Wiretap Library * Copyright (c) 1998 by Gilbert Ramirez * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * */ #ifndef __WTAP_H__ #define __WTAP_H__ /* Encapsulation types. Choose names that truly reflect * what is contained in the packet trace file. * * WTAP_ENCAP_PER_PACKET is a value passed to "wtap_dump_open()" or * "wtap_dump_fdopen()" to indicate that there is no single encapsulation * type for all packets in the file; this may cause those routines to * fail if the capture file format being written can't support that. * * WTAP_ENCAP_UNKNOWN is returned by "wtap_pcap_encap_to_wtap_encap()" * if it's handed an unknown encapsulation. * * WTAP_ENCAP_FDDI_BITSWAPPED is for FDDI captures on systems where the * MAC addresses you get from the hardware are bit-swapped. Ideally, * the driver would tell us that, but I know of none that do, so, for * now, we base it on the machine on which we're *reading* the * capture, rather than on the machine on which the capture was taken * (they're probably likely to be the same). We assume that they're * bit-swapped on everything except for systems running Ultrix, Alpha * systems, and BSD/OS systems (that's what "tcpdump" does; I guess * Digital decided to bit-swap addresses in the hardware or in the * driver, and I guess BSDI bit-swapped them in the driver, given that * BSD/OS generally runs on Boring Old PC's). If we create a wiretap * save file format, we'd use the WTAP_ENCAP values to flag the * encapsulation of a packet, so there we'd at least be able to base * it on the machine on which the capture was taken. * * WTAP_ENCAP_LINUX_ATM_CLIP is the encapsulation you get with the * ATM on Linux code from ; * that code adds a DLT_ATM_CLIP DLT_ code of 19, and that * encapsulation isn't the same as the DLT_ATM_RFC1483 encapsulation * presumably used on some BSD systems, which we turn into * WTAP_ENCAP_ATM_RFC1483. * * WTAP_ENCAP_NULL corresponds to DLT_NULL from "libpcap". This * corresponds to * * 1) PPP-over-HDLC encapsulation, at least with some versions * of ISDN4BSD (but not the current ones, it appears, unless * I've missed something); * * 2) a 4-byte header containing the AF_ address family, in * the byte order of the machine that saved the capture, * for the packet, as used on many BSD systems for the * loopback device and some other devices; * * 3) a 4-byte header containing 2 octets of 0 and an Ethernet * type in the byte order from an Ethernet header, that being * what "libpcap" on Linux turns the Ethernet header for * loopback interfaces into. */ #define WTAP_ENCAP_PER_PACKET -1 #define WTAP_ENCAP_UNKNOWN 0 #define WTAP_ENCAP_ETHERNET 1 #define WTAP_ENCAP_TR 2 #define WTAP_ENCAP_SLIP 3 #define WTAP_ENCAP_PPP 4 #define WTAP_ENCAP_FDDI 5 #define WTAP_ENCAP_FDDI_BITSWAPPED 6 #define WTAP_ENCAP_RAW_IP 7 #define WTAP_ENCAP_ARCNET 8 #define WTAP_ENCAP_ATM_RFC1483 9 #define WTAP_ENCAP_LINUX_ATM_CLIP 10 #define WTAP_ENCAP_LAPB 11 #define WTAP_ENCAP_ATM_SNIFFER 12 #define WTAP_ENCAP_NULL 13 /* last WTAP_ENCAP_ value + 1 */ #define WTAP_NUM_ENCAP_TYPES 13 /* File types that can be read by wiretap. We may eventually support writing some or all of these file types, too, so we distinguish between different versions of them. */ #define WTAP_FILE_UNKNOWN 0 #define WTAP_FILE_WTAP 1 #define WTAP_FILE_PCAP 2 #define WTAP_FILE_LANALYZER 3 #define WTAP_FILE_NGSNIFFER 4 #define WTAP_FILE_SNOOP 6 #define WTAP_FILE_IPTRACE 7 #define WTAP_FILE_NETMON_1_x 8 #define WTAP_FILE_NETMON_2_x 9 #define WTAP_FILE_NETXRAY_1_0 10 #define WTAP_FILE_NETXRAY_1_1 11 #define WTAP_FILE_NETXRAY_2_001 12 #define WTAP_FILE_RADCOM 13 /* * Maximum packet size we'll support. */ #define WTAP_MAX_PACKET_SIZE 65535 #include #ifdef HAVE_SYS_TIME_H #include #endif #ifdef HAVE_WINSOCK_H #include #endif #include #include typedef struct { double timeunit; time_t start; int is_atm; } ngsniffer_t; typedef struct { time_t start; } radcom_t; typedef struct { time_t start; } lanalyzer_t; typedef struct { int byte_swapped; guint16 version_major; guint16 version_minor; } libpcap_t; typedef struct { time_t start_secs; guint32 start_usecs; guint8 version_major; int end_offset; } netmon_t; typedef struct { time_t start_time; double timeunit; double start_timestamp; int wrapped; int end_offset; int version_major; } netxray_t; /* Packet "pseudo-header" information for X.25 capture files. */ struct x25_phdr { guint8 flags; /* ENCAP_LAPB : 1st bit means From DCE */ }; /* Packet "pseudo-header" for ATM Sniffer capture files. */ struct ngsniffer_atm_phdr { guint8 AppTrafType; /* traffic type */ guint8 AppHLType; /* protocol type */ guint16 Vpi; /* virtual path identifier */ guint16 Vci; /* virtual circuit identifier */ guint16 channel; /* link: 0 for DCE, 1 for DTE */ guint16 cells; /* number of cells */ guint16 aal5t_u2u; /* user-to-user indicator */ guint16 aal5t_len; /* length of the packet */ guint32 aal5t_chksum; /* checksum for AAL5 packet */ }; /* * Bits in AppTrafType. * * For AAL types other than AAL5, the packet data is presumably for a * single cell, not a reassembled frame, as the ATM Sniffer manual says * it dosn't reassemble cells other than AAL5 cells. */ #define ATT_AALTYPE 0x0F /* AAL type: */ #define ATT_AAL_UNKNOWN 0x00 /* Unknown AAL */ #define ATT_AAL1 0x01 /* AAL1 */ #define ATT_AAL3_4 0x02 /* AAL3/4 */ #define ATT_AAL5 0x03 /* AAL5 */ #define ATT_AAL_USER 0x04 /* User AAL */ #define ATT_AAL_SIGNALLING 0x05 /* Signaling AAL */ #define ATT_OAMCELL 0x06 /* OAM cell */ #define ATT_HLTYPE 0xF0 /* Higher-layer type: */ #define ATT_HL_UNKNOWN 0x00 /* unknown */ #define ATT_HL_LLCMX 0x10 /* LLC multiplexed (probably RFC 1483) */ #define ATT_HL_VCMX 0x20 /* VC multiplexed (probably RFC 1483) */ #define ATT_HL_LANE 0x30 /* LAN Emulation */ #define ATT_HL_ILMI 0x40 /* ILMI */ #define ATT_HL_FRMR 0x50 /* Frame Relay */ #define ATT_HL_SPANS 0x60 /* FORE SPANS */ #define ATT_HL_IPSILON 0x70 /* Ipsilon */ /* * Values for AppHLType; the interpretation depends on the ATT_HLTYPE * bits in AppTrafType. */ #define AHLT_UNKNOWN 0x0 #define AHLT_VCMX_802_3_FCS 0x1 /* VCMX: 802.3 FCS */ #define AHLT_LANE_LE_CTRL 0x1 /* LANE: LE Ctrl */ #define AHLT_IPSILON_FT0 0x1 /* Ipsilon: Flow Type 0 */ #define AHLT_VCMX_802_4_FCS 0x2 /* VCMX: 802.4 FCS */ #define AHLT_LANE_802_3 0x2 /* LANE: 802.3 */ #define AHLT_IPSILON_FT1 0x2 /* Ipsilon: Flow Type 1 */ #define AHLT_VCMX_802_5_FCS 0x3 /* VCMX: 802.5 FCS */ #define AHLT_LANE_802_5 0x3 /* LANE: 802.5 */ #define AHLT_IPSILON_FT2 0x3 /* Ipsilon: Flow Type 2 */ #define AHLT_VCMX_FDDI_FCS 0x4 /* VCMX: FDDI FCS */ #define AHLT_LANE_802_3_MC 0x4 /* LANE: 802.3 multicast */ #define AHLT_VCMX_802_6_FCS 0x5 /* VCMX: 802.6 FCS */ #define AHLT_LANE_802_5_MC 0x5 /* LANE: 802.5 multicast */ #define AHLT_VCMX_802_3 0x7 /* VCMX: 802.3 */ #define AHLT_VCMX_802_4 0x8 /* VCMX: 802.4 */ #define AHLT_VCMX_802_5 0x9 /* VCMX: 802.5 */ #define AHLT_VCMX_FDDI 0xa /* VCMX: FDDI */ #define AHLT_VCMX_802_6 0xb /* VCMX: 802.6 */ #define AHLT_VCMX_FRAGMENTS 0xc /* VCMX: Fragments */ #define AHLT_VCMX_BPDU 0xe /* VCMX: BPDU */ union pseudo_header { struct x25_phdr x25; struct ngsniffer_atm_phdr ngsniffer_atm; }; struct wtap_pkthdr { struct timeval ts; guint32 caplen; guint32 len; int pkt_encap; union pseudo_header pseudo_header; }; typedef void (*wtap_handler)(u_char*, const struct wtap_pkthdr*, int, const u_char *); struct wtap; struct bpf_instruction; struct Buffer; typedef int (*subtype_read_func)(struct wtap*, int*); typedef struct wtap { FILE* fh; int file_type; int snapshot_length; struct Buffer *frame_buffer; struct wtap_pkthdr phdr; long data_offset; union { libpcap_t *pcap; lanalyzer_t *lanalyzer; ngsniffer_t *ngsniffer; radcom_t *radcom; netmon_t *netmon; netxray_t *netxray; } capture; subtype_read_func subtype_read; int file_encap; /* per-file, for those file formats that have per-file encapsulation types */ } wtap; struct wtap_dumper; typedef int (*subtype_write_func)(struct wtap_dumper*, const struct wtap_pkthdr*, const u_char*, int*); typedef int (*subtype_close_func)(struct wtap_dumper*, int*); typedef struct wtap_dumper { FILE* fh; int file_type; int snaplen; int encap; subtype_write_func subtype_write; subtype_close_func subtype_close; } wtap_dumper; /* * On failure, "wtap_open_offline()" returns NULL, and puts into the * "int" pointed to by its second argument: * * a positive "errno" value if the capture file can't be opened; * * a negative number, indicating the type of error, on other failures. */ wtap* wtap_open_offline(const char *filename, int *err); int wtap_loop(wtap *wth, int, wtap_handler, u_char*, int*); FILE* wtap_file(wtap *wth); int wtap_snapshot_length(wtap *wth); /* per file */ int wtap_file_type(wtap *wth); const char *wtap_file_type_string(wtap *wth); const char *wtap_strerror(int err); void wtap_close(wtap *wth); wtap_dumper* wtap_dump_open(const char *filename, int filetype, int encap, int snaplen, int *err); wtap_dumper* wtap_dump_fdopen(int fd, int filetype, int encap, int snaplen, int *err); int wtap_dump(wtap_dumper *, const struct wtap_pkthdr *, const u_char *, int *err); FILE* wtap_dump_file(wtap_dumper *); int wtap_dump_close(wtap_dumper *, int *); /* XXX - needed until "wiretap" can do live packet captures */ int wtap_pcap_encap_to_wtap_encap(int encap); /* * Wiretap error codes. */ #define WTAP_ERR_NOT_REGULAR_FILE -1 /* The file being opened for reading isn't a plain file */ #define WTAP_ERR_FILE_UNKNOWN_FORMAT -2 /* The file being opened is not a capture file in a known format */ #define WTAP_ERR_UNSUPPORTED -3 /* Supported file type, but there's something in the file we can't support */ #define WTAP_ERR_CANT_OPEN -4 /* The file couldn't be opened, reason unknown */ #define WTAP_ERR_UNSUPPORTED_FILE_TYPE -5 /* Wiretap can't save files in the specified format */ #define WTAP_ERR_UNSUPPORTED_ENCAP -6 /* Wiretap can't save files in the specified format with the specified encapsulation */ #define WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED -7 /* The specified format doesn't support per-packet encapsulations */ #define WTAP_ERR_CANT_CLOSE -8 /* The file couldn't be closed, reason unknown */ #define WTAP_ERR_CANT_READ -9 /* An attempt to read failed, reason unknown */ #define WTAP_ERR_SHORT_READ -10 /* An attempt to read read less data than it should have */ #define WTAP_ERR_BAD_RECORD -11 /* We read an invalid record */ #define WTAP_ERR_SHORT_WRITE -12 /* An attempt to write wrote less data than it should have */ /* Pointer versions of ntohs and ntohl. Given a pointer to a member of a * byte array, returns the value of the two or four bytes at the pointer. * The pletoh[sl] versions return the little-endian representation. */ #ifndef pntohs #define pntohs(p) ((guint16) \ ((guint16)*((guint8 *)p+0)<<8| \ (guint16)*((guint8 *)p+1)<<0)) #endif #ifndef pntohl #define pntohl(p) ((guint32)*((guint8 *)p+0)<<24| \ (guint32)*((guint8 *)p+1)<<16| \ (guint32)*((guint8 *)p+2)<<8| \ (guint32)*((guint8 *)p+3)<<0) #endif #ifndef phtons #define phtons(p) ((guint16) \ ((guint16)*((guint8 *)p+0)<<8| \ (guint16)*((guint8 *)p+1)<<0)) #endif #ifndef phtonl #define phtonl(p) ((guint32)*((guint8 *)p+0)<<24| \ (guint32)*((guint8 *)p+1)<<16| \ (guint32)*((guint8 *)p+2)<<8| \ (guint32)*((guint8 *)p+3)<<0) #endif #ifndef pletohs #define pletohs(p) ((guint16) \ ((guint16)*((guint8 *)p+1)<<8| \ (guint16)*((guint8 *)p+0)<<0)) #endif #ifndef plethol #define pletohl(p) ((guint32)*((guint8 *)p+3)<<24| \ (guint32)*((guint8 *)p+2)<<16| \ (guint32)*((guint8 *)p+1)<<8| \ (guint32)*((guint8 *)p+0)<<0) #endif #endif /* __WTAP_H__ */