245 lines
8.6 KiB
C
245 lines
8.6 KiB
C
/* $OpenBSD: pcap.h,v 1.22 2021/01/18 09:26:35 sthen Exp $ */
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/*
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* Copyright (c) 1993, 1994, 1995, 1996, 1997
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* The Regents of the University of California. 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 the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the Computer Systems
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* Engineering Group at Lawrence Berkeley Laboratory.
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* 4. Neither the name of the University nor of the Laboratory may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lib_pcap_h
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#define lib_pcap_h
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#include <sys/types.h>
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#include <sys/time.h>
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#include <net/bpf.h>
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#include <stdio.h>
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#define PCAP_VERSION_MAJOR 2
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#define PCAP_VERSION_MINOR 4
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#define PCAP_ERRBUF_SIZE 256
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/*
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* Compatibility for systems that have a bpf.h that
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* predates the bpf typedefs for 64-bit support.
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*/
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#if BPF_RELEASE - 0 < 199406
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typedef int bpf_int32;
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typedef u_int bpf_u_int32;
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#endif
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typedef struct pcap pcap_t;
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typedef struct pcap_if pcap_if_t;
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typedef struct pcap_addr pcap_addr_t;
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typedef struct pcap_dumper pcap_dumper_t;
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/*
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* The first record in the file contains saved values for some
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* of the flags used in the printout phases of tcpdump.
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* Many fields here are 32 bit ints so compilers won't insert unwanted
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* padding; these files need to be interchangeable across architectures.
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*/
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struct pcap_file_header {
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bpf_u_int32 magic;
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u_short version_major;
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u_short version_minor;
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bpf_int32 thiszone; /* gmt to local correction */
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bpf_u_int32 sigfigs; /* accuracy of timestamps */
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bpf_u_int32 snaplen; /* max length saved portion of each pkt */
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bpf_u_int32 linktype; /* data link type (DLT_*) */
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};
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typedef enum {
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PCAP_D_INOUT = 0,
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PCAP_D_IN,
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PCAP_D_OUT
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} pcap_direction_t;
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/*
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* Each packet in the dump file is prepended with this generic header.
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* This gets around the problem of different headers for different
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* packet interfaces.
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*/
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struct pcap_pkthdr {
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struct bpf_timeval ts; /* time stamp */
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bpf_u_int32 caplen; /* length of portion present */
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bpf_u_int32 len; /* length of this packet (off wire) */
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};
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/*
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* As returned by the pcap_stats()
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*/
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struct pcap_stat {
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u_int ps_recv; /* number of packets received */
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u_int ps_drop; /* number of packets dropped */
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u_int ps_ifdrop; /* drops by interface XXX not yet supported */
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};
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/*
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* Item in a list of interfaces.
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*/
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struct pcap_if {
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struct pcap_if *next;
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char *name; /* name to hand to "pcap_open_live()" */
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char *description; /* textual description of interface, or NULL */
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struct pcap_addr *addresses;
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bpf_u_int32 flags; /* PCAP_IF_ interface flags */
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};
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#define PCAP_IF_LOOPBACK 0x00000001 /* interface is loopback */
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/*
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* Representation of an interface address.
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*/
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struct pcap_addr {
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struct pcap_addr *next;
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struct sockaddr *addr; /* address */
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struct sockaddr *netmask; /* netmask for that address */
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struct sockaddr *broadaddr; /* broadcast address for that address */
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struct sockaddr *dstaddr; /* P2P destination address for that address */
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};
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/*
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* Error codes for the pcap API.
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* These will all be negative, so you can check for the success or
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* failure of a call that returns these codes by checking for a
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* negative value.
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*/
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#define PCAP_ERROR -1 /* generic error code */
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#define PCAP_ERROR_BREAK -2 /* loop terminated by pcap_breakloop */
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#define PCAP_ERROR_NOT_ACTIVATED -3 /* the capture needs to be activated */
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#define PCAP_ERROR_ACTIVATED -4 /* the operation can't be performed on already activated captures */
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#define PCAP_ERROR_NO_SUCH_DEVICE -5 /* no such device exists */
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#define PCAP_ERROR_RFMON_NOTSUP -6 /* this device doesn't support rfmon (monitor) mode */
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#define PCAP_ERROR_NOT_RFMON -7 /* operation supported only in monitor mode */
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#define PCAP_ERROR_PERM_DENIED -8 /* no permission to open the device */
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#define PCAP_ERROR_IFACE_NOT_UP -9 /* interface isn't up */
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#define PCAP_ERROR_CANTSET_TSTAMP_TYPE -10 /* this device doesn't support setting the time stamp type */
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#define PCAP_ERROR_PROMISC_PERM_DENIED -11 /* you don't have permission to capture in promiscuous mode */
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/*
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* Warning codes for the pcap API.
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* These will all be positive and non-zero, so they won't look like
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* errors.
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*/
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#define PCAP_WARNING 1 /* generic warning code */
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#define PCAP_WARNING_PROMISC_NOTSUP 2 /* this device doesn't support promiscuous mode */
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#define PCAP_WARNING_TSTAMP_TYPE_NOTSUP 3 /* the requested time stamp type is not supported */
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/*
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* Value to pass to pcap_compile() as the netmask if you don't know what
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* the netmask is.
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*/
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#define PCAP_NETMASK_UNKNOWN 0xffffffff
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typedef void (*pcap_handler)(u_char *, const struct pcap_pkthdr *,
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const u_char *);
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__BEGIN_DECLS
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char *pcap_lookupdev(char *);
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int pcap_lookupnet(const char *, bpf_u_int32 *, bpf_u_int32 *, char *);
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pcap_t *pcap_create(const char *, char *);
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int pcap_set_snaplen(pcap_t *, int);
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int pcap_set_promisc(pcap_t *, int);
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int pcap_can_set_rfmon(pcap_t *);
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int pcap_set_rfmon(pcap_t *, int);
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int pcap_set_timeout(pcap_t *, int);
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int pcap_set_immediate_mode(pcap_t *, int);
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int pcap_set_buffer_size(pcap_t *, int);
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int pcap_activate(pcap_t *);
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pcap_t *pcap_open_live(const char *, int, int, int, char *);
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pcap_t *pcap_open_dead(int, int);
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pcap_t *pcap_open_offline(const char *, char *);
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pcap_t *pcap_fopen_offline(FILE *, char *);
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void pcap_close(pcap_t *);
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int pcap_loop(pcap_t *, int, pcap_handler, u_char *);
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int pcap_dispatch(pcap_t *, int, pcap_handler, u_char *);
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const u_char*
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pcap_next(pcap_t *, struct pcap_pkthdr *);
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int pcap_next_ex(pcap_t *, struct pcap_pkthdr **, const u_char **);
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void pcap_breakloop(pcap_t *);
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int pcap_stats(pcap_t *, struct pcap_stat *);
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int pcap_setfilter(pcap_t *, struct bpf_program *);
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int pcap_setdirection(pcap_t *, pcap_direction_t);
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int pcap_getnonblock(pcap_t *, char *);
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int pcap_setnonblock(pcap_t *, int, char *);
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void pcap_perror(pcap_t *, const char *);
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int pcap_inject(pcap_t *, const void *, size_t);
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int pcap_sendpacket(pcap_t *, const u_char *, int);
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const char *pcap_statustostr(int);
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const char *pcap_strerror(int);
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char *pcap_geterr(pcap_t *);
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int pcap_compile(pcap_t *, struct bpf_program *, const char *, int,
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bpf_u_int32);
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int pcap_compile_nopcap(int, int, struct bpf_program *,
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const char *, int, bpf_u_int32);
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void pcap_freecode(struct bpf_program *);
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int pcap_offline_filter(const struct bpf_program *,
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const struct pcap_pkthdr *, const u_char *);
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int pcap_datalink(pcap_t *);
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int pcap_list_datalinks(pcap_t *, int **);
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int pcap_set_datalink(pcap_t *, int);
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void pcap_free_datalinks(int *);
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int pcap_datalink_name_to_val(const char *);
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const char *pcap_datalink_val_to_name(int);
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const char *pcap_datalink_val_to_description(int);
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int pcap_snapshot(pcap_t *);
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int pcap_is_swapped(pcap_t *);
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int pcap_major_version(pcap_t *);
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int pcap_minor_version(pcap_t *);
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/* XXX */
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FILE *pcap_file(pcap_t *);
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int pcap_fileno(pcap_t *);
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pcap_dumper_t *pcap_dump_open(pcap_t *, const char *);
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pcap_dumper_t *pcap_dump_fopen(pcap_t *, FILE *fp);
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FILE *pcap_dump_file(pcap_dumper_t *);
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long pcap_dump_ftell(pcap_dumper_t *);
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int pcap_dump_flush(pcap_dumper_t *);
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void pcap_dump_close(pcap_dumper_t *);
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void pcap_dump(u_char *, const struct pcap_pkthdr *, const u_char *);
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int pcap_findalldevs(pcap_if_t **, char *);
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void pcap_freealldevs(pcap_if_t *);
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const char *pcap_lib_version(void);
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char *bpf_image(const struct bpf_insn *, int);
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int pcap_get_selectable_fd(pcap_t *);
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__END_DECLS
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#endif
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