/* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */ /* * Copyright (c) 1993, 1994, 1995, 1996, 1997 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the Computer Systems * Engineering Group at Lawrence Berkeley Laboratory. * 4. Neither the name of the University nor of the Laboratory may be used * to endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Remote packet capture mechanisms and extensions from WinPcap: * * Copyright (c) 2002 - 2003 * NetGroup, Politecnico di Torino (Italy) * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the Politecnico di Torino nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #ifndef lib_pcap_pcap_h #define lib_pcap_pcap_h #include <pcap/funcattrs.h> #include <pcap/pcap-inttypes.h> #if defined(_WIN32) #include <winsock2.h> /* u_int, u_char etc. */ #include <io.h> /* _get_osfhandle() */ #elif defined(MSDOS) #include <sys/types.h> /* u_int, u_char etc. */ #include <sys/socket.h> #else /* UN*X */ #include <sys/types.h> /* u_int, u_char etc. */ #include <sys/time.h> #endif /* _WIN32/MSDOS/UN*X */ #include <pcap/socket.h> /* for SOCKET, as the active-mode rpcap APIs use it */ #ifndef PCAP_DONT_INCLUDE_PCAP_BPF_H #include <pcap/bpf.h> #endif #include <stdio.h> #ifdef __cplusplus extern "C" { #endif /* * Version number of the current version of the pcap file format. * * NOTE: this is *NOT* the version number of the libpcap library. * To fetch the version information for the version of libpcap * you're using, use pcap_lib_version(). */ #define PCAP_VERSION_MAJOR 2 #define PCAP_VERSION_MINOR 4 #define PCAP_ERRBUF_SIZE 256 /* * Compatibility for systems that have a bpf.h that * predates the bpf typedefs for 64-bit support. */ #if BPF_RELEASE - 0 < 199406 typedef int bpf_int32; typedef u_int bpf_u_int32; #endif typedef struct pcap pcap_t; typedef struct pcap_dumper pcap_dumper_t; typedef struct pcap_if pcap_if_t; typedef struct pcap_addr pcap_addr_t; /* * The first record in the file contains saved values for some * of the flags used in the printout phases of tcpdump. * Many fields here are 32 bit ints so compilers won't insert unwanted * padding; these files need to be interchangeable across architectures. * * Do not change the layout of this structure, in any way (this includes * changes that only affect the length of fields in this structure). * * Also, do not change the interpretation of any of the members of this * structure, in any way (this includes using values other than * LINKTYPE_ values, as defined in "savefile.c", in the "linktype" * field). * * Instead: * * introduce a new structure for the new format, if the layout * of the structure changed; * * send mail to "tcpdump-workers@lists.tcpdump.org", requesting * a new magic number for your new capture file format, and, when * you get the new magic number, put it in "savefile.c"; * * use that magic number for save files with the changed file * header; * * make the code in "savefile.c" capable of reading files with * the old file header as well as files with the new file header * (using the magic number to determine the header format). * * Then supply the changes by forking the branch at * * https://github.com/the-tcpdump-group/libpcap/issues * * and issuing a pull request, so that future versions of libpcap and * programs that use it (such as tcpdump) will be able to read your new * capture file format. */ struct pcap_file_header { bpf_u_int32 magic; u_short version_major; u_short version_minor; bpf_int32 thiszone; /* gmt to local correction */ bpf_u_int32 sigfigs; /* accuracy of timestamps */ bpf_u_int32 snaplen; /* max length saved portion of each pkt */ bpf_u_int32 linktype; /* data link type (LINKTYPE_*) */ }; /* * Macros for the value returned by pcap_datalink_ext(). * * If LT_FCS_LENGTH_PRESENT(x) is true, the LT_FCS_LENGTH(x) macro * gives the FCS length of packets in the capture. */ #define LT_FCS_LENGTH_PRESENT(x) ((x) & 0x04000000) #define LT_FCS_LENGTH(x) (((x) & 0xF0000000) >> 28) #define LT_FCS_DATALINK_EXT(x) ((((x) & 0xF) << 28) | 0x04000000) typedef enum { PCAP_D_INOUT = 0, PCAP_D_IN, PCAP_D_OUT } pcap_direction_t; /* * Generic per-packet information, as supplied by libpcap. * * The time stamp can and should be a "struct timeval", regardless of * whether your system supports 32-bit tv_sec in "struct timeval", * 64-bit tv_sec in "struct timeval", or both if it supports both 32-bit * and 64-bit applications. The on-disk format of savefiles uses 32-bit * tv_sec (and tv_usec); this structure is irrelevant to that. 32-bit * and 64-bit versions of libpcap, even if they're on the same platform, * should supply the appropriate version of "struct timeval", even if * that's not what the underlying packet capture mechanism supplies. */ struct pcap_pkthdr { struct timeval ts; /* time stamp */ bpf_u_int32 caplen; /* length of portion present */ bpf_u_int32 len; /* length this packet (off wire) */ #ifdef __APPLE__ char comment[256]; #endif }; /* * As returned by the pcap_stats() */ struct pcap_stat { u_int ps_recv; /* number of packets received */ u_int ps_drop; /* number of packets dropped */ u_int ps_ifdrop; /* drops by interface -- only supported on some platforms */ #ifdef _WIN32 u_int ps_capt; /* number of packets that reach the application */ u_int ps_sent; /* number of packets sent by the server on the network */ u_int ps_netdrop; /* number of packets lost on the network */ #endif /* _WIN32 */ }; #ifdef MSDOS /* * As returned by the pcap_stats_ex() */ struct pcap_stat_ex { u_long rx_packets; /* total packets received */ u_long tx_packets; /* total packets transmitted */ u_long rx_bytes; /* total bytes received */ u_long tx_bytes; /* total bytes transmitted */ u_long rx_errors; /* bad packets received */ u_long tx_errors; /* packet transmit problems */ u_long rx_dropped; /* no space in Rx buffers */ u_long tx_dropped; /* no space available for Tx */ u_long multicast; /* multicast packets received */ u_long collisions; /* detailed rx_errors: */ u_long rx_length_errors; u_long rx_over_errors; /* receiver ring buff overflow */ u_long rx_crc_errors; /* recv'd pkt with crc error */ u_long rx_frame_errors; /* recv'd frame alignment error */ u_long rx_fifo_errors; /* recv'r fifo overrun */ u_long rx_missed_errors; /* recv'r missed packet */ /* detailed tx_errors */ u_long tx_aborted_errors; u_long tx_carrier_errors; u_long tx_fifo_errors; u_long tx_heartbeat_errors; u_long tx_window_errors; }; #endif /* * Item in a list of interfaces. */ struct pcap_if { struct pcap_if *next; char *name; /* name to hand to "pcap_open_live()" */ char *description; /* textual description of interface, or NULL */ struct pcap_addr *addresses; bpf_u_int32 flags; /* PCAP_IF_ interface flags */ }; #define PCAP_IF_LOOPBACK 0x00000001 /* interface is loopback */ #define PCAP_IF_UP 0x00000002 /* interface is up */ #define PCAP_IF_RUNNING 0x00000004 /* interface is running */ #define PCAP_IF_WIRELESS 0x00000008 /* interface is wireless (*NOT* necessarily Wi-Fi!) */ #define PCAP_IF_CONNECTION_STATUS 0x00000030 /* connection status: */ #define PCAP_IF_CONNECTION_STATUS_UNKNOWN 0x00000000 /* unknown */ #define PCAP_IF_CONNECTION_STATUS_CONNECTED 0x00000010 /* connected */ #define PCAP_IF_CONNECTION_STATUS_DISCONNECTED 0x00000020 /* disconnected */ #define PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE 0x00000030 /* not applicable */ /* * Representation of an interface address. */ struct pcap_addr { struct pcap_addr *next; struct sockaddr *addr; /* address */ struct sockaddr *netmask; /* netmask for that address */ struct sockaddr *broadaddr; /* broadcast address for that address */ struct sockaddr *dstaddr; /* P2P destination address for that address */ }; typedef void (*pcap_handler)(u_char *, const struct pcap_pkthdr *, const u_char *); /* * Error codes for the pcap API. * These will all be negative, so you can check for the success or * failure of a call that returns these codes by checking for a * negative value. */ #define PCAP_ERROR -1 /* generic error code */ #define PCAP_ERROR_BREAK -2 /* loop terminated by pcap_breakloop */ #define PCAP_ERROR_NOT_ACTIVATED -3 /* the capture needs to be activated */ #define PCAP_ERROR_ACTIVATED -4 /* the operation can't be performed on already activated captures */ #define PCAP_ERROR_NO_SUCH_DEVICE -5 /* no such device exists */ #define PCAP_ERROR_RFMON_NOTSUP -6 /* this device doesn't support rfmon (monitor) mode */ #define PCAP_ERROR_NOT_RFMON -7 /* operation supported only in monitor mode */ #define PCAP_ERROR_PERM_DENIED -8 /* no permission to open the device */ #define PCAP_ERROR_IFACE_NOT_UP -9 /* interface isn't up */ #define PCAP_ERROR_CANTSET_TSTAMP_TYPE -10 /* this device doesn't support setting the time stamp type */ #define PCAP_ERROR_PROMISC_PERM_DENIED -11 /* you don't have permission to capture in promiscuous mode */ #define PCAP_ERROR_TSTAMP_PRECISION_NOTSUP -12 /* the requested time stamp precision is not supported */ /* * Warning codes for the pcap API. * These will all be positive and non-zero, so they won't look like * errors. */ #define PCAP_WARNING 1 /* generic warning code */ #define PCAP_WARNING_PROMISC_NOTSUP 2 /* this device doesn't support promiscuous mode */ #define PCAP_WARNING_TSTAMP_TYPE_NOTSUP 3 /* the requested time stamp type is not supported */ /* * Value to pass to pcap_compile() as the netmask if you don't know what * the netmask is. */ #define PCAP_NETMASK_UNKNOWN 0xffffffff /* * We're deprecating pcap_lookupdev() for various reasons (not * thread-safe, can behave weirdly with WinPcap). Callers * should use pcap_findalldevs() and use the first device. */ PCAP_API char *pcap_lookupdev(char *) PCAP_DEPRECATED(pcap_lookupdev, "use 'pcap_findalldevs' and use the first device"); PCAP_API int pcap_lookupnet(const char *, bpf_u_int32 *, bpf_u_int32 *, char *); PCAP_API pcap_t *pcap_create(const char *, char *); PCAP_API int pcap_set_snaplen(pcap_t *, int); PCAP_API int pcap_set_promisc(pcap_t *, int); PCAP_API int pcap_can_set_rfmon(pcap_t *); PCAP_API int pcap_set_rfmon(pcap_t *, int); PCAP_API int pcap_set_timeout(pcap_t *, int); PCAP_API int pcap_set_tstamp_type(pcap_t *, int); PCAP_API int pcap_set_immediate_mode(pcap_t *, int); PCAP_API int pcap_set_buffer_size(pcap_t *, int); PCAP_API int pcap_set_tstamp_precision(pcap_t *, int); PCAP_API int pcap_get_tstamp_precision(pcap_t *); PCAP_API int pcap_activate(pcap_t *); #ifdef __APPLE__ int pcap_apple_set_exthdr(pcap_t *p, int); #if PRIVATE /* * To access DLT_PKPTAP, pcap_set_want_pktap() must be called before pcap_activate() */ int pcap_set_want_pktap(pcap_t *, int); #endif /* PRIVATE */ #endif /* __APPLE__ */ PCAP_API int pcap_list_tstamp_types(pcap_t *, int **); PCAP_API void pcap_free_tstamp_types(int *); PCAP_API int pcap_tstamp_type_name_to_val(const char *); PCAP_API const char *pcap_tstamp_type_val_to_name(int); PCAP_API const char *pcap_tstamp_type_val_to_description(int); #ifdef __linux__ PCAP_API int pcap_set_protocol_linux(pcap_t *, int); #endif /* * Time stamp types. * Not all systems and interfaces will necessarily support all of these. * * A system that supports PCAP_TSTAMP_HOST is offering time stamps * provided by the host machine, rather than by the capture device, * but not committing to any characteristics of the time stamp; * it will not offer any of the PCAP_TSTAMP_HOST_ subtypes. * * PCAP_TSTAMP_HOST_LOWPREC is a time stamp, provided by the host machine, * that's low-precision but relatively cheap to fetch; it's normally done * using the system clock, so it's normally synchronized with times you'd * fetch from system calls. * * PCAP_TSTAMP_HOST_HIPREC is a time stamp, provided by the host machine, * that's high-precision; it might be more expensive to fetch. It might * or might not be synchronized with the system clock, and might have * problems with time stamps for packets received on different CPUs, * depending on the platform. * * PCAP_TSTAMP_ADAPTER is a high-precision time stamp supplied by the * capture device; it's synchronized with the system clock. * * PCAP_TSTAMP_ADAPTER_UNSYNCED is a high-precision time stamp supplied by * the capture device; it's not synchronized with the system clock. * * Note that time stamps synchronized with the system clock can go * backwards, as the system clock can go backwards. If a clock is * not in sync with the system clock, that could be because the * system clock isn't keeping accurate time, because the other * clock isn't keeping accurate time, or both. * * Note that host-provided time stamps generally correspond to the * time when the time-stamping code sees the packet; this could * be some unknown amount of time after the first or last bit of * the packet is received by the network adapter, due to batching * of interrupts for packet arrival, queueing delays, etc.. */ #define PCAP_TSTAMP_HOST 0 /* host-provided, unknown characteristics */ #define PCAP_TSTAMP_HOST_LOWPREC 1 /* host-provided, low precision */ #define PCAP_TSTAMP_HOST_HIPREC 2 /* host-provided, high precision */ #define PCAP_TSTAMP_ADAPTER 3 /* device-provided, synced with the system clock */ #define PCAP_TSTAMP_ADAPTER_UNSYNCED 4 /* device-provided, not synced with the system clock */ /* * Time stamp resolution types. * Not all systems and interfaces will necessarily support all of these * resolutions when doing live captures; all of them can be requested * when reading a savefile. */ #define PCAP_TSTAMP_PRECISION_MICRO 0 /* use timestamps with microsecond precision, default */ #define PCAP_TSTAMP_PRECISION_NANO 1 /* use timestamps with nanosecond precision */ PCAP_API pcap_t *pcap_open_live(const char *, int, int, int, char *); PCAP_API pcap_t *pcap_open_dead(int, int); PCAP_API pcap_t *pcap_open_dead_with_tstamp_precision(int, int, u_int); PCAP_API pcap_t *pcap_open_offline_with_tstamp_precision(const char *, u_int, char *); PCAP_API pcap_t *pcap_open_offline(const char *, char *); #ifdef _WIN32 PCAP_API pcap_t *pcap_hopen_offline_with_tstamp_precision(intptr_t, u_int, char *); PCAP_API pcap_t *pcap_hopen_offline(intptr_t, char *); /* * If we're building libpcap, these are internal routines in savefile.c, * so we must not define them as macros. * * If we're not building libpcap, given that the version of the C runtime * with which libpcap was built might be different from the version * of the C runtime with which an application using libpcap was built, * and that a FILE structure may differ between the two versions of the * C runtime, calls to _fileno() must use the version of _fileno() in * the C runtime used to open the FILE *, not the version in the C * runtime with which libpcap was built. (Maybe once the Universal CRT * rules the world, this will cease to be a problem.) */ #ifndef BUILDING_PCAP #define pcap_fopen_offline_with_tstamp_precision(f,p,b) \ pcap_hopen_offline_with_tstamp_precision(_get_osfhandle(_fileno(f)), p, b) #define pcap_fopen_offline(f,b) \ pcap_hopen_offline(_get_osfhandle(_fileno(f)), b) #endif #else /*_WIN32*/ PCAP_API pcap_t *pcap_fopen_offline_with_tstamp_precision(FILE *, u_int, char *); PCAP_API pcap_t *pcap_fopen_offline(FILE *, char *); #endif /*_WIN32*/ PCAP_API void pcap_close(pcap_t *); PCAP_API int pcap_loop(pcap_t *, int, pcap_handler, u_char *); PCAP_API int pcap_dispatch(pcap_t *, int, pcap_handler, u_char *); PCAP_API const u_char *pcap_next(pcap_t *, struct pcap_pkthdr *); PCAP_API int pcap_next_ex(pcap_t *, struct pcap_pkthdr **, const u_char **); PCAP_API void pcap_breakloop(pcap_t *); PCAP_API int pcap_stats(pcap_t *, struct pcap_stat *); PCAP_API int pcap_setfilter(pcap_t *, struct bpf_program *); PCAP_API int pcap_setdirection(pcap_t *, pcap_direction_t); PCAP_API int pcap_getnonblock(pcap_t *, char *); PCAP_API int pcap_setnonblock(pcap_t *, int, char *); PCAP_API int pcap_inject(pcap_t *, const void *, size_t); PCAP_API int pcap_sendpacket(pcap_t *, const u_char *, int); PCAP_API const char *pcap_statustostr(int); PCAP_API const char *pcap_strerror(int); PCAP_API char *pcap_geterr(pcap_t *); PCAP_API void pcap_perror(pcap_t *, const char *); PCAP_API int pcap_compile(pcap_t *, struct bpf_program *, const char *, int, bpf_u_int32); PCAP_API int pcap_compile_nopcap(int, int, struct bpf_program *, const char *, int, bpf_u_int32); PCAP_API void pcap_freecode(struct bpf_program *); PCAP_API int pcap_offline_filter(const struct bpf_program *, const struct pcap_pkthdr *, const u_char *); PCAP_API int pcap_datalink(pcap_t *); PCAP_API int pcap_datalink_ext(pcap_t *); PCAP_API int pcap_list_datalinks(pcap_t *, int **); PCAP_API int pcap_set_datalink(pcap_t *, int); PCAP_API void pcap_free_datalinks(int *); PCAP_API int pcap_datalink_name_to_val(const char *); PCAP_API const char *pcap_datalink_val_to_name(int); PCAP_API const char *pcap_datalink_val_to_description(int); PCAP_API const char *pcap_datalink_val_to_description_or_dlt(int); PCAP_API int pcap_snapshot(pcap_t *); PCAP_API int pcap_is_swapped(pcap_t *); PCAP_API int pcap_major_version(pcap_t *); PCAP_API int pcap_minor_version(pcap_t *); PCAP_API int pcap_bufsize(pcap_t *); /* XXX */ PCAP_API FILE *pcap_file(pcap_t *); PCAP_API int pcap_fileno(pcap_t *); #ifdef _WIN32 PCAP_API int pcap_wsockinit(void); #endif PCAP_API pcap_dumper_t *pcap_dump_open(pcap_t *, const char *); #ifdef _WIN32 PCAP_API pcap_dumper_t *pcap_dump_hopen(pcap_t *, intptr_t); /* * If we're building libpcap, this is an internal routine in sf-pcap.c, so * we must not define it as a macro. * * If we're not building libpcap, given that the version of the C runtime * with which libpcap was built might be different from the version * of the C runtime with which an application using libpcap was built, * and that a FILE structure may differ between the two versions of the * C runtime, calls to _fileno() must use the version of _fileno() in * the C runtime used to open the FILE *, not the version in the C * runtime with which libpcap was built. (Maybe once the Universal CRT * rules the world, this will cease to be a problem.) */ #ifndef BUILDING_PCAP #define pcap_dump_fopen(p,f) \ pcap_dump_hopen(p, _get_osfhandle(_fileno(f))) #endif #else /*_WIN32*/ PCAP_API pcap_dumper_t *pcap_dump_fopen(pcap_t *, FILE *fp); #endif /*_WIN32*/ PCAP_API pcap_dumper_t *pcap_dump_open_append(pcap_t *, const char *); PCAP_API FILE *pcap_dump_file(pcap_dumper_t *); PCAP_API long pcap_dump_ftell(pcap_dumper_t *); PCAP_API int64_t pcap_dump_ftell64(pcap_dumper_t *); PCAP_API int pcap_dump_flush(pcap_dumper_t *); PCAP_API void pcap_dump_close(pcap_dumper_t *); PCAP_API void pcap_dump(u_char *, const struct pcap_pkthdr *, const u_char *); PCAP_API int pcap_findalldevs(pcap_if_t **, char *); PCAP_API void pcap_freealldevs(pcap_if_t *); /* * We return a pointer to the version string, rather than exporting the * version string directly. * * On at least some UNIXes, if you import data from a shared library into * an program, the data is bound into the program binary, so if the string * in the version of the library with which the program was linked isn't * the same as the string in the version of the library with which the * program is being run, various undesirable things may happen (warnings, * the string being the one from the version of the library with which the * program was linked, or even weirder things, such as the string being the * one from the library but being truncated). * * On Windows, the string is constructed at run time. */ PCAP_API const char *pcap_lib_version(void); /* * On at least some versions of NetBSD and QNX, we don't want to declare * bpf_filter() here, as it's also be declared in <net/bpf.h>, with a * different signature, but, on other BSD-flavored UN*Xes, it's not * declared in <net/bpf.h>, so we *do* want to declare it here, so it's * declared when we build pcap-bpf.c. */ #if !defined(__NetBSD__) && !defined(__QNX__) PCAP_API u_int bpf_filter(const struct bpf_insn *, const u_char *, u_int, u_int); #endif PCAP_API int bpf_validate(const struct bpf_insn *f, int len); PCAP_API char *bpf_image(const struct bpf_insn *, int); PCAP_API void bpf_dump(const struct bpf_program *, int); #if defined(_WIN32) /* * Win32 definitions */ /*! \brief A queue of raw packets that will be sent to the network with pcap_sendqueue_transmit(). */ struct pcap_send_queue { u_int maxlen; /* Maximum size of the queue, in bytes. This variable contains the size of the buffer field. */ u_int len; /* Current size of the queue, in bytes. */ char *buffer; /* Buffer containing the packets to be sent. */ }; typedef struct pcap_send_queue pcap_send_queue; /*! \brief This typedef is a support for the pcap_get_airpcap_handle() function */ #if !defined(AIRPCAP_HANDLE__EAE405F5_0171_9592_B3C2_C19EC426AD34__DEFINED_) #define AIRPCAP_HANDLE__EAE405F5_0171_9592_B3C2_C19EC426AD34__DEFINED_ typedef struct _AirpcapHandle *PAirpcapHandle; #endif PCAP_API int pcap_setbuff(pcap_t *p, int dim); PCAP_API int pcap_setmode(pcap_t *p, int mode); PCAP_API int pcap_setmintocopy(pcap_t *p, int size); PCAP_API HANDLE pcap_getevent(pcap_t *p); PCAP_API int pcap_oid_get_request(pcap_t *, bpf_u_int32, void *, size_t *); PCAP_API int pcap_oid_set_request(pcap_t *, bpf_u_int32, const void *, size_t *); PCAP_API pcap_send_queue* pcap_sendqueue_alloc(u_int memsize); PCAP_API void pcap_sendqueue_destroy(pcap_send_queue* queue); PCAP_API int pcap_sendqueue_queue(pcap_send_queue* queue, const struct pcap_pkthdr *pkt_header, const u_char *pkt_data); PCAP_API u_int pcap_sendqueue_transmit(pcap_t *p, pcap_send_queue* queue, int sync); PCAP_API struct pcap_stat *pcap_stats_ex(pcap_t *p, int *pcap_stat_size); PCAP_API int pcap_setuserbuffer(pcap_t *p, int size); PCAP_API int pcap_live_dump(pcap_t *p, char *filename, int maxsize, int maxpacks); PCAP_API int pcap_live_dump_ended(pcap_t *p, int sync); PCAP_API int pcap_start_oem(char* err_str, int flags); PCAP_API PAirpcapHandle pcap_get_airpcap_handle(pcap_t *p); #define MODE_CAPT 0 #define MODE_STAT 1 #define MODE_MON 2 #elif defined(MSDOS) /* * MS-DOS definitions */ PCAP_API int pcap_stats_ex (pcap_t *, struct pcap_stat_ex *); PCAP_API void pcap_set_wait (pcap_t *p, void (*yield)(void), int wait); PCAP_API u_long pcap_mac_packets (void); #else /* UN*X */ /* * UN*X definitions */ PCAP_API int pcap_get_selectable_fd(pcap_t *); PCAP_API struct timeval *pcap_get_required_select_timeout(pcap_t *); #endif /* _WIN32/MSDOS/UN*X */ #ifdef __APPLE__ /* Internal API. */ int pcap_get_selectable_fd_list(pcap_t *, int **); void pcap_free_selectable_fd_list(int *); #endif /* __APPLE__ */ /* * Remote capture definitions. * * These routines are only present if libpcap has been configured to * include remote capture support. */ /* * The maximum buffer size in which address, port, interface names are kept. * * In case the adapter name or such is larger than this value, it is truncated. * This is not used by the user; however it must be aware that an hostname / interface * name longer than this value will be truncated. */ #define PCAP_BUF_SIZE 1024 /* * The type of input source, passed to pcap_open(). */ #define PCAP_SRC_FILE 2 /* local savefile */ #define PCAP_SRC_IFLOCAL 3 /* local network interface */ #define PCAP_SRC_IFREMOTE 4 /* interface on a remote host, using RPCAP */ /* * The formats allowed by pcap_open() are the following: * - file://path_and_filename [opens a local file] * - rpcap://devicename [opens the selected device devices available on the local host, without using the RPCAP protocol] * - rpcap://host/devicename [opens the selected device available on a remote host] * - rpcap://host:port/devicename [opens the selected device available on a remote host, using a non-standard port for RPCAP] * - adaptername [to open a local adapter; kept for compability, but it is strongly discouraged] * - (NULL) [to open the first local adapter; kept for compability, but it is strongly discouraged] * * The formats allowed by the pcap_findalldevs_ex() are the following: * - file://folder/ [lists all the files in the given folder] * - rpcap:// [lists all local adapters] * - rpcap://host:port/ [lists the devices available on a remote host] * * Referring to the 'host' and 'port' parameters, they can be either numeric or literal. Since * IPv6 is fully supported, these are the allowed formats: * * - host (literal): e.g. host.foo.bar * - host (numeric IPv4): e.g. 10.11.12.13 * - host (numeric IPv4, IPv6 style): e.g. [10.11.12.13] * - host (numeric IPv6): e.g. [1:2:3::4] * - port: can be either numeric (e.g. '80') or literal (e.g. 'http') * * Here you find some allowed examples: * - rpcap://host.foo.bar/devicename [everything literal, no port number] * - rpcap://host.foo.bar:1234/devicename [everything literal, with port number] * - rpcap://10.11.12.13/devicename [IPv4 numeric, no port number] * - rpcap://10.11.12.13:1234/devicename [IPv4 numeric, with port number] * - rpcap://[10.11.12.13]:1234/devicename [IPv4 numeric with IPv6 format, with port number] * - rpcap://[1:2:3::4]/devicename [IPv6 numeric, no port number] * - rpcap://[1:2:3::4]:1234/devicename [IPv6 numeric, with port number] * - rpcap://[1:2:3::4]:http/devicename [IPv6 numeric, with literal port number] */ /* * URL schemes for capture source. */ /* * This string indicates that the user wants to open a capture from a * local file. */ #define PCAP_SRC_FILE_STRING "file://" /* * This string indicates that the user wants to open a capture from a * network interface. This string does not necessarily involve the use * of the RPCAP protocol. If the interface required resides on the local * host, the RPCAP protocol is not involved and the local functions are used. */ #define PCAP_SRC_IF_STRING "rpcap://" /* * Flags to pass to pcap_open(). */ /* * Specifies whether promiscuous mode is to be used. */ #define PCAP_OPENFLAG_PROMISCUOUS 0x00000001 /* * Specifies, for an RPCAP capture, whether the data transfer (in * case of a remote capture) has to be done with UDP protocol. * * If it is '1' if you want a UDP data connection, '0' if you want * a TCP data connection; control connection is always TCP-based. * A UDP connection is much lighter, but it does not guarantee that all * the captured packets arrive to the client workstation. Moreover, * it could be harmful in case of network congestion. * This flag is meaningless if the source is not a remote interface. * In that case, it is simply ignored. */ #define PCAP_OPENFLAG_DATATX_UDP 0x00000002 /* * Specifies wheether the remote probe will capture its own generated * traffic. * * In case the remote probe uses the same interface to capture traffic * and to send data back to the caller, the captured traffic includes * the RPCAP traffic as well. If this flag is turned on, the RPCAP * traffic is excluded from the capture, so that the trace returned * back to the collector is does not include this traffic. * * Has no effect on local interfaces or savefiles. */ #define PCAP_OPENFLAG_NOCAPTURE_RPCAP 0x00000004 /* * Specifies whether the local adapter will capture its own generated traffic. * * This flag tells the underlying capture driver to drop the packets * that were sent by itself. This is useful when building applications * such as bridges that should ignore the traffic they just sent. * * Supported only on Windows. */ #define PCAP_OPENFLAG_NOCAPTURE_LOCAL 0x00000008 /* * This flag configures the adapter for maximum responsiveness. * * In presence of a large value for nbytes, WinPcap waits for the arrival * of several packets before copying the data to the user. This guarantees * a low number of system calls, i.e. lower processor usage, i.e. better * performance, which is good for applications like sniffers. If the user * sets the PCAP_OPENFLAG_MAX_RESPONSIVENESS flag, the capture driver will * copy the packets as soon as the application is ready to receive them. * This is suggested for real time applications (such as, for example, * a bridge) that need the best responsiveness. * * The equivalent with pcap_create()/pcap_activate() is "immediate mode". */ #define PCAP_OPENFLAG_MAX_RESPONSIVENESS 0x00000010 /* * Remote authentication methods. * These are used in the 'type' member of the pcap_rmtauth structure. */ /* * NULL authentication. * * The 'NULL' authentication has to be equal to 'zero', so that old * applications can just put every field of struct pcap_rmtauth to zero, * and it does work. */ #define RPCAP_RMTAUTH_NULL 0 /* * Username/password authentication. * * With this type of authentication, the RPCAP protocol will use the username/ * password provided to authenticate the user on the remote machine. If the * authentication is successful (and the user has the right to open network * devices) the RPCAP connection will continue; otherwise it will be dropped. * * *******NOTE********: the username and password are sent over the network * to the capture server *IN CLEAR TEXT*. Don't use this on a network * that you don't completely control! (And be *really* careful in your * definition of "completely"!) */ #define RPCAP_RMTAUTH_PWD 1 /* * This structure keeps the information needed to autheticate the user * on a remote machine. * * The remote machine can either grant or refuse the access according * to the information provided. * In case the NULL authentication is required, both 'username' and * 'password' can be NULL pointers. * * This structure is meaningless if the source is not a remote interface; * in that case, the functions which requires such a structure can accept * a NULL pointer as well. */ struct pcap_rmtauth { /* * \brief Type of the authentication required. * * In order to provide maximum flexibility, we can support different types * of authentication based on the value of this 'type' variable. The currently * supported authentication methods are defined into the * \link remote_auth_methods Remote Authentication Methods Section\endlink. */ int type; /* * \brief Zero-terminated string containing the username that has to be * used on the remote machine for authentication. * * This field is meaningless in case of the RPCAP_RMTAUTH_NULL authentication * and it can be NULL. */ char *username; /* * \brief Zero-terminated string containing the password that has to be * used on the remote machine for authentication. * * This field is meaningless in case of the RPCAP_RMTAUTH_NULL authentication * and it can be NULL. */ char *password; }; /* * This routine can open a savefile, a local device, or a device on * a remote machine running an RPCAP server. * * For opening a savefile, the pcap_open_offline routines can be used, * and will work just as well; code using them will work on more * platforms than code using pcap_open() to open savefiles. * * For opening a local device, pcap_open_live() can be used; it supports * most of the capabilities that pcap_open() supports, and code using it * will work on more platforms than code using pcap_open(). pcap_create() * and pcap_activate() can also be used; they support all capabilities * that pcap_open() supports, except for the Windows-only * PCAP_OPENFLAG_NOCAPTURE_LOCAL, and support additional capabilities. * * For opening a remote capture, pcap_open() is currently the only * API available. */ PCAP_API pcap_t *pcap_open(const char *source, int snaplen, int flags, int read_timeout, struct pcap_rmtauth *auth, char *errbuf); PCAP_API int pcap_createsrcstr(char *source, int type, const char *host, const char *port, const char *name, char *errbuf); PCAP_API int pcap_parsesrcstr(const char *source, int *type, char *host, char *port, char *name, char *errbuf); /* * This routine can scan a directory for savefiles, list local capture * devices, or list capture devices on a remote machine running an RPCAP * server. * * For scanning for savefiles, it can be used on both UN*X systems and * Windows systems; for each directory entry it sees, it tries to open * the file as a savefile using pcap_open_offline(), and only includes * it in the list of files if the open succeeds, so it filters out * files for which the user doesn't have read permission, as well as * files that aren't valid savefiles readable by libpcap. * * For listing local capture devices, it's just a wrapper around * pcap_findalldevs(); code using pcap_findalldevs() will work on more * platforms than code using pcap_findalldevs_ex(). * * For listing remote capture devices, pcap_findalldevs_ex() is currently * the only API available. */ PCAP_API int pcap_findalldevs_ex(const char *source, struct pcap_rmtauth *auth, pcap_if_t **alldevs, char *errbuf); /* * Sampling methods. * * These allow pcap_loop(), pcap_dispatch(), pcap_next(), and pcap_next_ex() * to see only a sample of packets, rather than all packets. * * Currently, they work only on Windows local captures. */ /* * Specifies that no sampling is to be done on the current capture. * * In this case, no sampling algorithms are applied to the current capture. */ #define PCAP_SAMP_NOSAMP 0 /* * Specifies that only 1 out of N packets must be returned to the user. * * In this case, the 'value' field of the 'pcap_samp' structure indicates the * number of packets (minus 1) that must be discarded before one packet got * accepted. * In other words, if 'value = 10', the first packet is returned to the * caller, while the following 9 are discarded. */ #define PCAP_SAMP_1_EVERY_N 1 /* * Specifies that we have to return 1 packet every N milliseconds. * * In this case, the 'value' field of the 'pcap_samp' structure indicates * the 'waiting time' in milliseconds before one packet got accepted. * In other words, if 'value = 10', the first packet is returned to the * caller; the next returned one will be the first packet that arrives * when 10ms have elapsed. */ #define PCAP_SAMP_FIRST_AFTER_N_MS 2 /* * This structure defines the information related to sampling. * * In case the sampling is requested, the capturing device should read * only a subset of the packets coming from the source. The returned packets * depend on the sampling parameters. * * WARNING: The sampling process is applied *after* the filtering process. * In other words, packets are filtered first, then the sampling process * selects a subset of the 'filtered' packets and it returns them to the * caller. */ struct pcap_samp { /* * Method used for sampling; see above. */ int method; /* * This value depends on the sampling method defined. * For its meaning, see above. */ int value; }; /* * New functions. */ PCAP_API struct pcap_samp *pcap_setsampling(pcap_t *p); /* * RPCAP active mode. */ /* Maximum length of an host name (needed for the RPCAP active mode) */ #define RPCAP_HOSTLIST_SIZE 1024 PCAP_API SOCKET pcap_remoteact_accept(const char *address, const char *port, const char *hostlist, char *connectinghost, struct pcap_rmtauth *auth, char *errbuf); PCAP_API int pcap_remoteact_list(char *hostlist, char sep, int size, char *errbuf); PCAP_API int pcap_remoteact_close(const char *host, char *errbuf); PCAP_API void pcap_remoteact_cleanup(void); #ifdef __cplusplus } #endif #endif /* lib_pcap_pcap_h */