diff options
Diffstat (limited to 'pcap-int.h')
| -rw-r--r-- | pcap-int.h | 278 |
1 files changed, 179 insertions, 99 deletions
@@ -34,53 +34,40 @@ #ifndef pcap_int_h #define pcap_int_h +#include <signal.h> + #include <pcap/pcap.h> +#include "varattrs.h" +#include "fmtutils.h" + +/* + * Version string. + * Uses PACKAGE_VERSION from config.h. + */ +#define PCAP_VERSION_STRING "libpcap version " PACKAGE_VERSION + #ifdef __cplusplus extern "C" { #endif -#ifdef WIN32 -#include <Packet32.h> -extern CRITICAL_SECTION g_PcapCompileCriticalSection; -#endif /* WIN32 */ - #ifdef MSDOS -#include <fcntl.h> -#include <io.h> + #include <fcntl.h> + #include <io.h> #endif -#if (defined(_MSC_VER) && (_MSC_VER <= 1200)) /* we are compiling with Visual Studio 6, that doesn't support the LL suffix*/ - -/* - * Swap byte ordering of unsigned long long timestamp on a big endian - * machine. - */ -#define SWAPLL(ull) ((ull & 0xff00000000000000) >> 56) | \ - ((ull & 0x00ff000000000000) >> 40) | \ - ((ull & 0x0000ff0000000000) >> 24) | \ - ((ull & 0x000000ff00000000) >> 8) | \ - ((ull & 0x00000000ff000000) << 8) | \ - ((ull & 0x0000000000ff0000) << 24) | \ - ((ull & 0x000000000000ff00) << 40) | \ - ((ull & 0x00000000000000ff) << 56) - -#else /* A recent Visual studio compiler or not VC */ - /* * Swap byte ordering of unsigned long long timestamp on a big endian * machine. */ -#define SWAPLL(ull) ((ull & 0xff00000000000000LL) >> 56) | \ - ((ull & 0x00ff000000000000LL) >> 40) | \ - ((ull & 0x0000ff0000000000LL) >> 24) | \ - ((ull & 0x000000ff00000000LL) >> 8) | \ - ((ull & 0x00000000ff000000LL) << 8) | \ - ((ull & 0x0000000000ff0000LL) << 24) | \ - ((ull & 0x000000000000ff00LL) << 40) | \ - ((ull & 0x00000000000000ffLL) << 56) - -#endif /* _MSC_VER */ +#define SWAPLL(ull) ((ull & 0xff00000000000000ULL) >> 56) | \ + ((ull & 0x00ff000000000000ULL) >> 40) | \ + ((ull & 0x0000ff0000000000ULL) >> 24) | \ + ((ull & 0x000000ff00000000ULL) >> 8) | \ + ((ull & 0x00000000ff000000ULL) << 8) | \ + ((ull & 0x0000000000ff0000ULL) << 24) | \ + ((ull & 0x000000000000ff00ULL) << 40) | \ + ((ull & 0x00000000000000ffULL) << 56) /* * Maximum snapshot length. @@ -99,38 +86,64 @@ extern CRITICAL_SECTION g_PcapCompileCriticalSection; * 2) small enough not to cause attempts to allocate huge amounts of * memory; some applications might use the snapshot length in a * savefile header to control the size of the buffer they allocate, - * so a size of, say, 2^31-1 might not work well. + * so a size of, say, 2^31-1 might not work well. (libpcap uses it + * as a hint, but doesn't start out allocating a buffer bigger than + * 2 KiB, and grows the buffer as necessary, but not beyond the + * per-linktype maximum snapshot length. Other code might naively + * use it; we want to avoid writing a too-large snapshot length, + * in order not to cause that code problems.) * * We don't enforce this in pcap_set_snaplen(), but we use it internally. */ #define MAXIMUM_SNAPLEN 262144 struct pcap_opt { - char *source; + char *device; int timeout; /* timeout for buffering */ - int buffer_size; + u_int buffer_size; int promisc; int rfmon; /* monitor mode */ int immediate; /* immediate mode - deliver packets as soon as they arrive */ + int nonblock; /* non-blocking mode - don't wait for packets to be delivered, return "no packets available" */ int tstamp_type; int tstamp_precision; + + /* + * Platform-dependent options. + */ +#ifdef __linux__ + int protocol; /* protocol to use when creating PF_PACKET socket */ +#endif +#ifdef _WIN32 + int nocapture_local;/* disable NPF loopback */ +#endif }; typedef int (*activate_op_t)(pcap_t *); typedef int (*can_set_rfmon_op_t)(pcap_t *); typedef int (*read_op_t)(pcap_t *, int cnt, pcap_handler, u_char *); +typedef int (*next_packet_op_t)(pcap_t *, struct pcap_pkthdr *, u_char **); typedef int (*inject_op_t)(pcap_t *, const void *, size_t); +typedef void (*save_current_filter_op_t)(pcap_t *, const char *); typedef int (*setfilter_op_t)(pcap_t *, struct bpf_program *); typedef int (*setdirection_op_t)(pcap_t *, pcap_direction_t); typedef int (*set_datalink_op_t)(pcap_t *, int); -typedef int (*getnonblock_op_t)(pcap_t *, char *); -typedef int (*setnonblock_op_t)(pcap_t *, int, char *); +typedef int (*getnonblock_op_t)(pcap_t *); +typedef int (*setnonblock_op_t)(pcap_t *, int); typedef int (*stats_op_t)(pcap_t *, struct pcap_stat *); -#ifdef WIN32 +#ifdef _WIN32 +typedef struct pcap_stat *(*stats_ex_op_t)(pcap_t *, int *); typedef int (*setbuff_op_t)(pcap_t *, int); typedef int (*setmode_op_t)(pcap_t *, int); typedef int (*setmintocopy_op_t)(pcap_t *, int); -typedef Adapter *(*getadapter_op_t)(pcap_t *); +typedef HANDLE (*getevent_op_t)(pcap_t *); +typedef int (*oid_get_request_op_t)(pcap_t *, bpf_u_int32, void *, size_t *); +typedef int (*oid_set_request_op_t)(pcap_t *, bpf_u_int32, const void *, size_t *); +typedef u_int (*sendqueue_transmit_op_t)(pcap_t *, pcap_send_queue *, int); +typedef int (*setuserbuffer_op_t)(pcap_t *, int); +typedef int (*live_dump_op_t)(pcap_t *, char *, int, int); +typedef int (*live_dump_ended_op_t)(pcap_t *, int); +typedef PAirpcapHandle (*get_airpcap_handle_op_t)(pcap_t *); #endif typedef void (*cleanup_op_t)(pcap_t *); @@ -145,34 +158,35 @@ struct pcap { read_op_t read_op; /* - * Method to call to read to read packets from a savefile. + * Method to call to read the next packet from a savefile. */ - int (*next_packet_op)(pcap_t *, struct pcap_pkthdr *, u_char **); + next_packet_op_t next_packet_op; -#ifdef WIN32 - ADAPTER *adapter; - LPPACKET Packet; - int nonblock; +#ifdef _WIN32 + HANDLE handle; #else int fd; - int selectable_fd; -#endif /* WIN32 */ +#endif /* _WIN32 */ /* * Read buffer. */ - int bufsize; - u_char *buffer; + u_int bufsize; + void *buffer; u_char *bp; int cc; - int break_loop; /* flag set to force break from packet-reading loop */ + sig_atomic_t break_loop; /* flag set to force break from packet-reading loop */ void *priv; /* private data for methods */ +#ifdef ENABLE_REMOTE + struct pcap_samp rmt_samp; /* parameters related to the sampling process. */ +#endif + int swapped; FILE *rfile; /* null if live capture, non-null if savefile */ - int fddipad; + u_int fddipad; struct pcap *next; /* list of open pcaps that need stuff cleared on close */ /* @@ -199,10 +213,36 @@ struct pcap { */ u_char *pkt; +#ifdef _WIN32 + struct pcap_stat stat; /* used for pcap_stats_ex() */ +#endif + /* We're accepting only packets in this direction/these directions. */ pcap_direction_t direction; /* + * Flags to affect BPF code generation. + */ + int bpf_codegen_flags; + +#if !defined(_WIN32) && !defined(MSDOS) + int selectable_fd; /* FD on which select()/poll()/epoll_wait()/kevent()/etc. can be done */ + + /* + * In case there either is no selectable FD, or there is but + * it doesn't necessarily work (e.g., if it doesn't get notified + * if the packet capture timeout expires before the buffer + * fills up), this points to a timeout that should be used + * in select()/poll()/epoll_wait()/kevent() call. The pcap_t should + * be put into non-blocking mode, and, if the timeout expires on + * the call, an attempt should be made to read packets from all + * pcap_t's with a required timeout, and the code must be + * prepared not to see any packets from the attempt. + */ + struct timeval *required_select_timeout; +#endif + + /* * Placeholder for filter code if bpf not in kernel. */ struct bpf_program fcode; @@ -223,6 +263,7 @@ struct pcap { activate_op_t activate_op; can_set_rfmon_op_t can_set_rfmon_op; inject_op_t inject_op; + save_current_filter_op_t save_current_filter_op; setfilter_op_t setfilter_op; setdirection_op_t setdirection_op; set_datalink_op_t set_datalink_op; @@ -235,20 +276,33 @@ struct pcap { */ pcap_handler oneshot_callback; -#ifdef WIN32 +#ifdef _WIN32 /* * These are, at least currently, specific to the Win32 NPF * driver. */ + stats_ex_op_t stats_ex_op; setbuff_op_t setbuff_op; setmode_op_t setmode_op; setmintocopy_op_t setmintocopy_op; - getadapter_op_t getadapter_op; + getevent_op_t getevent_op; + oid_get_request_op_t oid_get_request_op; + oid_set_request_op_t oid_set_request_op; + sendqueue_transmit_op_t sendqueue_transmit_op; + setuserbuffer_op_t setuserbuffer_op; + live_dump_op_t live_dump_op; + live_dump_ended_op_t live_dump_ended_op; + get_airpcap_handle_op_t get_airpcap_handle_op; #endif cleanup_op_t cleanup_op; }; /* + * BPF code generation flags. + */ +#define BPF_SPECIAL_VLAN_HANDLING 0x00000001 /* special VLAN handling for Linux */ + +/* * This is a timeval as stored in a savefile. * It has to use the same types everywhere, independent of the actual * `struct timeval'; `struct timeval' has 32-bit tv_sec values on some @@ -328,34 +382,15 @@ struct oneshot_userdata { pcap_t *pd; }; -int yylex(void); - #ifndef min #define min(a, b) ((a) > (b) ? (b) : (a)) #endif -/* XXX should these be in pcap.h? */ int pcap_offline_read(pcap_t *, int, pcap_handler, u_char *); -int pcap_read(pcap_t *, int cnt, pcap_handler, u_char *); - -#ifndef HAVE_STRLCPY -#define strlcpy(x, y, z) \ - (strncpy((x), (y), (z)), \ - ((z) <= 0 ? 0 : ((x)[(z) - 1] = '\0')), \ - strlen((y))) -#endif #include <stdarg.h> -#if !defined(HAVE_SNPRINTF) -#define snprintf pcap_snprintf -extern int snprintf (char *, size_t, const char *, ...); -#endif - -#if !defined(HAVE_VSNPRINTF) -#define vsnprintf pcap_vsnprintf -extern int vsnprintf (char *, size_t, const char *, va_list ap); -#endif +#include "portability.h" /* * Does the packet count argument to a module's read routine say @@ -366,9 +401,9 @@ extern int vsnprintf (char *, size_t, const char *, va_list ap); /* * Routines that most pcap implementations can use for non-blocking mode. */ -#if !defined(WIN32) && !defined(MSDOS) -int pcap_getnonblock_fd(pcap_t *, char *); -int pcap_setnonblock_fd(pcap_t *p, int, char *); +#if !defined(_WIN32) && !defined(MSDOS) +int pcap_getnonblock_fd(pcap_t *); +int pcap_setnonblock_fd(pcap_t *p, int); #endif /* @@ -383,38 +418,58 @@ int pcap_setnonblock_fd(pcap_t *p, int, char *); * by pcap_create routines. */ pcap_t *pcap_create_interface(const char *, char *); -pcap_t *pcap_create_common(const char *, char *, size_t); +pcap_t *pcap_create_common(char *, size_t); int pcap_do_addexit(pcap_t *); void pcap_add_to_pcaps_to_close(pcap_t *); void pcap_remove_from_pcaps_to_close(pcap_t *); void pcap_cleanup_live_common(pcap_t *); -int pcap_not_initialized(pcap_t *); int pcap_check_activated(pcap_t *); /* * Internal interfaces for "pcap_findalldevs()". * - * "pcap_findalldevs_interfaces()" finds interfaces using the - * "standard" mechanisms (SIOCGIFCONF, "getifaddrs()", etc.). + * A pcap_if_list_t * is a reference to a list of devices. + * + * A get_if_flags_func is a platform-dependent function called to get + * additional interface flags. + * + * "pcap_platform_finddevs()" is the platform-dependent routine to + * find local network interfaces. + * + * "pcap_findalldevs_interfaces()" is a helper to find those interfaces + * using the "standard" mechanisms (SIOCGIFCONF, "getifaddrs()", etc.). * - * "pcap_platform_finddevs()" is a platform-dependent routine to - * add devices not found by the "standard" mechanisms. + * "add_dev()" adds an entry to a pcap_if_list_t. * - * "pcap_add_if()" adds an interface to the list of interfaces, for - * use by various "find interfaces" routines. + * "find_dev()" tries to find a device, by name, in a pcap_if_list_t. + * + * "find_or_add_dev()" checks whether a device is already in a pcap_if_list_t + * and, if not, adds an entry for it. */ -int pcap_findalldevs_interfaces(pcap_if_t **, char *); -int pcap_platform_finddevs(pcap_if_t **, char *); -int add_addr_to_iflist(pcap_if_t **, const char *, u_int, struct sockaddr *, - size_t, struct sockaddr *, size_t, struct sockaddr *, size_t, - struct sockaddr *, size_t, char *); +struct pcap_if_list; +typedef struct pcap_if_list pcap_if_list_t; +typedef int (*get_if_flags_func)(const char *, bpf_u_int32 *, char *); +int pcap_platform_finddevs(pcap_if_list_t *, char *); +#if !defined(_WIN32) && !defined(MSDOS) +int pcap_findalldevs_interfaces(pcap_if_list_t *, char *, + int (*)(const char *), get_if_flags_func); +#endif +pcap_if_t *find_or_add_dev(pcap_if_list_t *, const char *, bpf_u_int32, + get_if_flags_func, const char *, char *); +pcap_if_t *find_dev(pcap_if_list_t *, const char *); +pcap_if_t *add_dev(pcap_if_list_t *, const char *, bpf_u_int32, const char *, + char *); int add_addr_to_dev(pcap_if_t *, struct sockaddr *, size_t, struct sockaddr *, size_t, struct sockaddr *, size_t, struct sockaddr *dstaddr, size_t, char *errbuf); -int pcap_add_if(pcap_if_t **, const char *, u_int, const char *, char *); -struct sockaddr *dup_sockaddr(struct sockaddr *, size_t); -int add_or_find_if(pcap_if_t **, pcap_if_t **, const char *, u_int, - const char *, char *); +#ifndef _WIN32 +pcap_if_t *find_or_add_if(pcap_if_list_t *, const char *, bpf_u_int32, + get_if_flags_func, char *); +int add_addr_to_if(pcap_if_list_t *, const char *, bpf_u_int32, + get_if_flags_func, + struct sockaddr *, size_t, struct sockaddr *, size_t, + struct sockaddr *, size_t, struct sockaddr *, size_t, char *); +#endif /* * Internal interfaces for "pcap_open_offline()". @@ -422,14 +477,39 @@ int add_or_find_if(pcap_if_t **, pcap_if_t **, const char *, u_int, * "pcap_open_offline_common()" allocates and fills in a pcap_t, for use * by pcap_open_offline routines. * + * "pcap_adjust_snapshot()" adjusts the snapshot to be non-zero and + * fit within an int. + * * "sf_cleanup()" closes the file handle associated with a pcap_t, if * appropriate, and frees all data common to all modules for handling * savefile types. */ pcap_t *pcap_open_offline_common(char *ebuf, size_t size); +bpf_u_int32 pcap_adjust_snapshot(bpf_u_int32 linktype, bpf_u_int32 snaplen); void sf_cleanup(pcap_t *p); /* + * Internal interfaces for doing user-mode filtering of packets and + * validating filter programs. + */ +/* + * Auxiliary data, for use when interpreting a filter intended for the + * Linux kernel when the kernel rejects the filter (requiring us to + * run it in userland). It contains VLAN tag information. + */ +struct bpf_aux_data { + u_short vlan_tag_present; + u_short vlan_tag; +}; + +/* + * Filtering routine that takes the auxiliary data as an additional + * argument. + */ +u_int bpf_filter_with_aux_data(const struct bpf_insn *, + const u_char *, u_int, u_int, const struct bpf_aux_data *); + +/* * Internal interfaces for both "pcap_create()" and routines that * open savefiles. * @@ -438,14 +518,14 @@ void sf_cleanup(pcap_t *p); */ void pcap_oneshot(u_char *, const struct pcap_pkthdr *, const u_char *); -#ifdef WIN32 -char *pcap_win32strerror(void); -#endif - int install_bpf_program(pcap_t *, struct bpf_program *); int pcap_strcasecmp(const char *, const char *); +#ifdef YYDEBUG +extern int pcap_debug; +#endif + #ifdef __cplusplus } #endif |