#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <limits.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/utsname.h>
#include <sys/mman.h>
#include <linux/if.h>
#include <linux/if_packet.h>
#include <linux/sockios.h>
#include <linux/ethtool.h>
#include <netinet/in.h>
#include <linux/if_ether.h>
#include <linux/if_arp.h>
#include <poll.h>
#include <dirent.h>
#include <sys/eventfd.h>
#include "pcap-int.h"
#include "pcap/sll.h"
#include "pcap/vlan.h"
#include "diag-control.h"
#include <linux/types.h>
#include <linux/filter.h>
#include <linux/if_bonding.h>

Include dependency graph for pcap-linux.c:

Data Structures
struct	pcap_linux

union	thdr

struct	dsa_proto

Macros
#define	_GNU_SOURCE

#define	__atomic_load_n(ptr, memory_model) (*(ptr))

#define	__atomic_store_n(ptr, val, memory_model) *(ptr) = (val)

#define	packet_mmap_acquire(pkt) (__atomic_load_n(&pkt->tp_status, __ATOMIC_ACQUIRE) != TP_STATUS_KERNEL)

#define	packet_mmap_release(pkt) (__atomic_store_n(&pkt->tp_status, TP_STATUS_KERNEL, __ATOMIC_RELEASE))

#define	packet_mmap_v3_acquire(pkt) (__atomic_load_n(&pkt->hdr.bh1.block_status, __ATOMIC_ACQUIRE) != TP_STATUS_KERNEL)

#define	packet_mmap_v3_release(pkt) (__atomic_store_n(&pkt->hdr.bh1.block_status, TP_STATUS_KERNEL, __ATOMIC_RELEASE))

#define	MAX_LINKHEADER_SIZE 256

#define	BIGGER_THAN_ALL_MTUS (64*1024)

#define	MUST_CLEAR_RFMON 0x00000001 /* clear rfmon (monitor) mode */

#define	MUST_DELETE_MONIF 0x00000002 /* delete monitor-mode interface */

#define	RING_GET_FRAME_AT(h, offset) (((u_char **)h->buffer)[(offset)])

#define	RING_GET_CURRENT_FRAME(h) RING_GET_FRAME_AT(h, h->offset)

#define	VLAN_VALID(hdr, hv) ((hv)->tp_vlan_tci != 0 \|\| ((hdr)->tp_status & 0x10))

#define	VLAN_TPID(hdr, hv) ETH_P_8021Q

#define	ARPHRD_CAN 280

#define	ARPHRD_IEEE802_TR 800 /* From Linux 2.4 */

#define	ARPHRD_FDDI 774

#define	ARPHRD_ATM 19

#define	ARPHRD_IEEE80211 801

#define	ARPHRD_IEEE80211_PRISM 802

#define	ARPHRD_IEEE80211_RADIOTAP 803

#define	ARPHRD_CISCO 513 /* previously ARPHRD_HDLC */

#define	ARPHRD_SIT 776 /* From Linux 2.2.13 */

#define	ARPHRD_RAWHDLC 518

#define	ARPHRD_DLCI 15

#define	ARPHRD_FRAD 770

#define	ARPHRD_FCPP 784

#define	ARPHRD_FCAL 785

#define	ARPHRD_FCPL 786

#define	ARPHRD_FCFABRIC 787

#define	ARPHRD_IRDA 783

#define	ARPHRD_LAPD 8445

#define	ARPHRD_NONE 0xFFFE

#define	ARPHRD_IEEE802154 804

#define	ARPHRD_NETLINK 824

#define	ARPHRD_VSOCKMON 826

#define	MAX(a, b) ((a)>(b)?(a):(b))

Typedefs
typedef int	socklen_t

Functions
static int	get_if_flags (const char , bpf_u_int32 , char *)

static int	is_wifi (const char *)

static void	map_arphrd_to_dlt (pcap_t , int, const char , int)

static int	pcap_activate_linux (pcap_t *)

static int	activate_pf_packet (pcap_t *, int)

static int	setup_mmapped (pcap_t , int )

static int	pcap_can_set_rfmon_linux (pcap_t *)

static int	pcap_inject_linux (pcap_t , const void , int)

static int	pcap_stats_linux (pcap_t , struct pcap_stat )

static int	pcap_setfilter_linux (pcap_t , struct bpf_program )

static int	pcap_setdirection_linux (pcap_t *, pcap_direction_t)

static int	pcap_set_datalink_linux (pcap_t *, int)

static void	pcap_cleanup_linux (pcap_t *)

static void	destroy_ring (pcap_t *handle)

static int	create_ring (pcap_t handle, int status)

static int	prepare_tpacket_socket (pcap_t *handle)

static int	pcap_read_linux_mmap_v2 (pcap_t , int, pcap_handler, u_char )

static int	pcap_setnonblock_linux (pcap_t *p, int nonblock)

static int	pcap_getnonblock_linux (pcap_t *p)

static void	pcap_oneshot_linux (u_char user, const struct pcap_pkthdr h, const u_char *bytes)

static int	iface_get_id (int fd, const char device, char ebuf)

static int	iface_get_mtu (int fd, const char device, char ebuf)

static int	iface_get_arptype (int fd, const char device, char ebuf)

static int	iface_bind (int fd, int ifindex, char *ebuf, int protocol)

static int	enter_rfmon_mode (pcap_t handle, int sock_fd, const char device)

static int	iface_get_offload (pcap_t *handle)

static int	fix_program (pcap_t handle, struct sock_fprog fcode)

static int	fix_offset (pcap_t handle, struct bpf_insn p)

static int	set_kernel_filter (pcap_t handle, struct sock_fprog fcode)

static int	reset_kernel_filter (pcap_t *handle)

static int	iface_dsa_get_proto_info (const char device, pcap_t handle)

pcap_t *	pcap_create_interface (const char device, char ebuf)

static int	pcap_protocol (pcap_t *handle)

static long long int	linux_get_stat (const char if_name, const char stat)

static long long int	linux_if_drops (const char *if_name)

static void	set_poll_timeout (struct pcap_linux *handlep)

static void	pcap_breakloop_linux (pcap_t *handle)

static int	linux_check_direction (const pcap_t handle, const struct sockaddr_ll sll)

static int	device_still_exists (pcap_t *handle)

static int	can_be_bound (const char *name)

static int	get_if_ioctl_socket (void)

int	pcap_platform_finddevs (pcap_if_list_t devlistp, char errbuf)

static void	set_dlt_list_cooked (pcap_t *handle, int sock_fd)

static int	init_tpacket (pcap_t handle, int version, const char version_str)

static u_int	pcap_get_ring_frame_status (pcap_t *handle, int offset)

static int	pcap_wait_for_frames_mmap (pcap_t *handle)

static int	pcap_handle_packet_mmap (pcap_t handle, pcap_handler callback, u_char user, unsigned char *frame, unsigned int tp_len, unsigned int tp_mac, unsigned int tp_snaplen, unsigned int tp_sec, unsigned int tp_usec, int tp_vlan_tci_valid, __u16 tp_vlan_tci, __u16 tp_vlan_tpid)

int	pcap_set_protocol_linux (pcap_t *p, int protocol)

const char *	pcap_lib_version (void)

Variables
static const struct timeval	netdown_timeout

static struct sock_filter	total_insn = { (u_short)( 0x06 \| 0x00 ), 0, 0, 0 }

static struct sock_fprog	total_fcode = { 1, &total_insn }

static const char	any_descr [] = "Pseudo-device that captures on all interfaces"

static struct dsa_proto	dsa_protos []

Macro Definition Documentation

◆ __atomic_load_n

#define __atomic_load_n	(	ptr,
		memory_model
	)	(*(ptr))

Definition at line 127 of file pcap-linux.c.

◆ __atomic_store_n

#define __atomic_store_n	(	ptr,
		val,
		memory_model
	)	*(ptr) = (val)

Definition at line 130 of file pcap-linux.c.

◆ _GNU_SOURCE

#define _GNU_SOURCE

Definition at line 71 of file pcap-linux.c.

◆ ARPHRD_ATM

#define ARPHRD_ATM 19

◆ ARPHRD_CAN

#define ARPHRD_CAN 280

◆ ARPHRD_CISCO

#define ARPHRD_CISCO 513 /* previously ARPHRD_HDLC */

◆ ARPHRD_DLCI

#define ARPHRD_DLCI 15

◆ ARPHRD_FCAL

#define ARPHRD_FCAL 785

◆ ARPHRD_FCFABRIC

#define ARPHRD_FCFABRIC 787

◆ ARPHRD_FCPL

#define ARPHRD_FCPL 786

◆ ARPHRD_FCPP

#define ARPHRD_FCPP 784

◆ ARPHRD_FDDI

#define ARPHRD_FDDI 774

◆ ARPHRD_FRAD

#define ARPHRD_FRAD 770

◆ ARPHRD_IEEE80211

#define ARPHRD_IEEE80211 801

◆ ARPHRD_IEEE80211_PRISM

#define ARPHRD_IEEE80211_PRISM 802

◆ ARPHRD_IEEE80211_RADIOTAP

#define ARPHRD_IEEE80211_RADIOTAP 803

◆ ARPHRD_IEEE802154

#define ARPHRD_IEEE802154 804

◆ ARPHRD_IEEE802_TR

#define ARPHRD_IEEE802_TR 800 /* From Linux 2.4 */

◆ ARPHRD_IRDA

#define ARPHRD_IRDA 783

◆ ARPHRD_LAPD

#define ARPHRD_LAPD 8445

◆ ARPHRD_NETLINK

#define ARPHRD_NETLINK 824

◆ ARPHRD_NONE

#define ARPHRD_NONE 0xFFFE

◆ ARPHRD_RAWHDLC

#define ARPHRD_RAWHDLC 518

◆ ARPHRD_SIT

#define ARPHRD_SIT 776 /* From Linux 2.2.13 */

◆ ARPHRD_VSOCKMON

#define ARPHRD_VSOCKMON 826

◆ BIGGER_THAN_ALL_MTUS

#define BIGGER_THAN_ALL_MTUS (64*1024)

Definition at line 178 of file pcap-linux.c.

◆ MAX

#define MAX	(	a,
		b
	)	((a)>(b)?(a):(b))

Definition at line 2851 of file pcap-linux.c.

◆ MAX_LINKHEADER_SIZE

#define MAX_LINKHEADER_SIZE 256

Definition at line 171 of file pcap-linux.c.

◆ MUST_CLEAR_RFMON

#define MUST_CLEAR_RFMON 0x00000001 /* clear rfmon (monitor) mode */

Definition at line 215 of file pcap-linux.c.

◆ MUST_DELETE_MONIF

#define MUST_DELETE_MONIF 0x00000002 /* delete monitor-mode interface */

Definition at line 216 of file pcap-linux.c.

◆ packet_mmap_acquire

#define packet_mmap_acquire ( pkt ) (__atomic_load_n(&pkt->tp_status, __ATOMIC_ACQUIRE) != TP_STATUS_KERNEL)

Definition at line 133 of file pcap-linux.c.

◆ packet_mmap_release

#define packet_mmap_release ( pkt ) (__atomic_store_n(&pkt->tp_status, TP_STATUS_KERNEL, __ATOMIC_RELEASE))

Definition at line 135 of file pcap-linux.c.

◆ packet_mmap_v3_acquire

#define packet_mmap_v3_acquire ( pkt ) (__atomic_load_n(&pkt->hdr.bh1.block_status, __ATOMIC_ACQUIRE) != TP_STATUS_KERNEL)

Definition at line 137 of file pcap-linux.c.

◆ packet_mmap_v3_release

#define packet_mmap_v3_release ( pkt ) (__atomic_store_n(&pkt->hdr.bh1.block_status, TP_STATUS_KERNEL, __ATOMIC_RELEASE))

Definition at line 139 of file pcap-linux.c.

◆ RING_GET_CURRENT_FRAME

#define RING_GET_CURRENT_FRAME ( h ) RING_GET_FRAME_AT(h, h->offset)

Definition at line 244 of file pcap-linux.c.

◆ RING_GET_FRAME_AT

#define RING_GET_FRAME_AT	(	h,
		offset
	)	(((u_char **)h->buffer)[(offset)])

Definition at line 243 of file pcap-linux.c.

◆ VLAN_TPID

#define VLAN_TPID	(	hdr,
		hv
	)	ETH_P_8021Q

Definition at line 301 of file pcap-linux.c.

◆ VLAN_VALID

#define VLAN_VALID	(	hdr,
		hv
	)	((hv)->tp_vlan_tci != 0 \|\| ((hdr)->tp_status & 0x10))

Definition at line 295 of file pcap-linux.c.

Typedef Documentation

◆ socklen_t

typedef int socklen_t

Definition at line 168 of file pcap-linux.c.

Function Documentation

◆ activate_pf_packet()

static int activate_pf_packet	(	pcap_t *	handle,
		int	is_any_device
	)

static

Definition at line 2278 of file pcap-linux.c.

References pcap::bpf_codegen_flags, BPF_SPECIAL_VLAN_HANDLING, pcap::bufsize, close(), pcap_linux::cooked, pcap_opt::device, pcap::dlt_count, DLT_EN10MB, DLT_LINUX_IRDA, DLT_LINUX_LAPD, DLT_LINUX_SLL, pcap::dlt_list, DLT_NETLINK, enter_rfmon_mode(), pcap::errbuf, errno, ETH_ALEN, pcap::fd, getsockopt(), iface_bind(), iface_get_arptype(), iface_get_id(), pcap_linux::ifindex, pcap::linktype, pcap_linux::lo_ifindex, map_arphrd_to_dlt(), pcap_linux::mondevice, pcap::offset, pcap::opt, PCAP_ERRBUF_SIZE, PCAP_ERROR, PCAP_ERROR_PERM_DENIED, PCAP_ERROR_RFMON_NOTSUP, pcap_fmt_errmsg_for_errno(), PCAP_TSTAMP_PRECISION_NANO, PCAP_WARNING, pcap::priv, pcap_opt::promisc, pcap_opt::rfmon, set_dlt_list_cooked(), setsockopt(), SLL2_HDR_LEN, SLL_HDR_LEN, pcap::snapshot, snprintf(), socket(), pcap_opt::tstamp_precision, pcap_linux::vlan_offset, and VLAN_TAG_LEN.

Referenced by pcap_activate_linux().

◆ can_be_bound()

static int can_be_bound ( const char * name )

static

Definition at line 1393 of file pcap-linux.c.

Referenced by pcap_platform_finddevs().

◆ create_ring()

static int create_ring	(	pcap_t *	handle,
		int *	status
	)

static

Definition at line 2863 of file pcap-linux.c.

References pcap::buffer, pcap_opt::buffer_size, pcap::bufsize, pcap::cc, destroy_ring(), pcap_opt::device, DLT_EN10MB, DLT_LINUX_SLL2, pcap::errbuf, errno, pcap::fd, getpagesize(), getsockopt(), iface_get_mtu(), iface_get_offload(), ioctl(), pcap::linktype, MAX, MAX_LINKHEADER_SIZE, MAXIMUM_SNAPLEN, pcap_linux::mmapbuf, pcap_linux::mmapbuflen, pcap::offset, pcap::opt, PCAP_ERRBUF_SIZE, PCAP_ERROR, PCAP_ERROR_PERM_DENIED, pcap_fmt_errmsg_for_errno(), pcap_strlcpy(), PCAP_TSTAMP_ADAPTER, PCAP_TSTAMP_ADAPTER_UNSYNCED, PCAP_WARNING_TSTAMP_TYPE_NOTSUP, pcap::priv, RING_GET_CURRENT_FRAME, setsockopt(), SLL2_HDR_LEN, SLL_HDR_LEN, pcap::snapshot, snprintf(), pcap_linux::timeout, pcap_linux::tp_hdrlen, pcap_linux::tp_version, pcap_opt::tstamp_type, and VLAN_TAG_LEN.

Referenced by setup_mmapped().

◆ destroy_ring()

static void destroy_ring ( pcap_t * handle )

static

Definition at line 3295 of file pcap-linux.c.

References pcap::fd, pcap_linux::mmapbuf, pcap_linux::mmapbuflen, munmap(), pcap::priv, and setsockopt().

Referenced by create_ring(), and pcap_cleanup_linux().

◆ device_still_exists()

static int device_still_exists ( pcap_t * handle )

static

Definition at line 1176 of file pcap-linux.c.

References pcap::errbuf, errno, pcap::fd, getsockname(), pcap_linux::ifindex, PCAP_ERRBUF_SIZE, pcap_fmt_errmsg_for_errno(), and pcap::priv.

Referenced by pcap_wait_for_frames_mmap().

◆ enter_rfmon_mode()

static int enter_rfmon_mode	(	pcap_t *	handle,
		int	sock_fd,
		const char *	device
	)

static

Definition at line 4641 of file pcap-linux.c.

Referenced by activate_pf_packet().

◆ fix_offset()

static int fix_offset	(	pcap_t *	handle,
		struct bpf_insn *	p
	)

static

Definition at line 5178 of file pcap-linux.c.

References DLT_LINUX_SLL2, bpf_insn::k, pcap::linktype, SLL2_HDR_LEN, and SLL_HDR_LEN.

Referenced by fix_program().

◆ fix_program()

static int fix_program	(	pcap_t *	handle,
		struct sock_fprog *	fcode
	)

static

Definition at line 5109 of file pcap-linux.c.

References bpf_program::bf_insns, bpf_program::bf_len, BPF_ABS, BPF_CLASS, BPF_IND, BPF_LD, BPF_LDX, BPF_MODE, BPF_MSH, bpf_insn::code, pcap_linux::cooked, pcap::errbuf, errno, pcap::fcode, fix_offset(), PCAP_ERRBUF_SIZE, pcap_fmt_errmsg_for_errno(), and pcap::priv.

Referenced by pcap_setfilter_linux().

◆ get_if_flags()

static int get_if_flags	(	const char *	name,
		bpf_u_int32 *	flags,
		char *	errbuf
	)

static

Definition at line 1522 of file pcap-linux.c.

References ARPHRD_IEEE80211, ARPHRD_IEEE80211_PRISM, ARPHRD_IEEE80211_RADIOTAP, ARPHRD_IEEE802154, ARPHRD_IRDA, close(), errno, get_if_ioctl_socket(), ioctl(), is_wifi(), PCAP_ERRBUF_SIZE, pcap_fmt_errmsg_for_errno(), PCAP_IF_CONNECTION_STATUS_CONNECTED, PCAP_IF_CONNECTION_STATUS_DISCONNECTED, PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE, PCAP_IF_LOOPBACK, PCAP_IF_WIRELESS, pcap_strlcpy(), and snprintf().

Referenced by pcap_platform_finddevs().

◆ get_if_ioctl_socket()

static int get_if_ioctl_socket ( void )

static

Definition at line 1402 of file pcap-linux.c.

References close(), errno, ioctl(), and socket().

Referenced by get_if_flags().

◆ iface_bind()

static int iface_bind	(	int	fd,
		int	ifindex,
		char *	ebuf,
		int	protocol
	)

static

Definition at line 4446 of file pcap-linux.c.

References bind(), errno, getsockopt(), PCAP_ERRBUF_SIZE, PCAP_ERROR, PCAP_ERROR_IFACE_NOT_UP, PCAP_ERROR_NO_SUCH_DEVICE, and pcap_fmt_errmsg_for_errno().

Referenced by activate_pf_packet(), and pcap_activate_linux().

◆ iface_dsa_get_proto_info()

static int iface_dsa_get_proto_info	(	const char *	device,
		pcap_t *	handle
	)

static

Definition at line 4992 of file pcap-linux.c.

References close(), DLT_EN10MB, dsa_protos, pcap::errbuf, errno, pcap::linktype, dsa_proto::linktype, PCAP_ERRBUF_SIZE, PCAP_ERROR, pcap_fmt_errmsg_for_errno(), read(), and snprintf().

Referenced by map_arphrd_to_dlt().

◆ iface_get_arptype()

static int iface_get_arptype	(	int	fd,
		const char *	device,
		char *	ebuf
	)

static

Definition at line 5084 of file pcap-linux.c.

References errno, ioctl(), PCAP_ERRBUF_SIZE, PCAP_ERROR, PCAP_ERROR_NO_SUCH_DEVICE, pcap_fmt_errmsg_for_errno(), and pcap_strlcpy().

Referenced by activate_pf_packet().

◆ iface_get_id()

static int iface_get_id	(	int	fd,
		const char *	device,
		char *	ebuf
	)

static

Definition at line 4425 of file pcap-linux.c.

References errno, ioctl(), PCAP_ERRBUF_SIZE, pcap_fmt_errmsg_for_errno(), and pcap_strlcpy().

Referenced by activate_pf_packet().

◆ iface_get_mtu()

static int iface_get_mtu	(	int	fd,
		const char *	device,
		char *	ebuf
	)

static

Definition at line 5061 of file pcap-linux.c.

References BIGGER_THAN_ALL_MTUS, errno, ioctl(), PCAP_ERRBUF_SIZE, pcap_fmt_errmsg_for_errno(), and pcap_strlcpy().

Referenced by create_ring().

◆ iface_get_offload()

static int iface_get_offload ( pcap_t * handle )

static

Definition at line 4965 of file pcap-linux.c.

Referenced by create_ring().

◆ init_tpacket()

static int init_tpacket	(	pcap_t *	handle,
		int	version,
		const char *	version_str
	)

static

Definition at line 2718 of file pcap-linux.c.

References pcap::errbuf, errno, pcap::fd, getsockopt(), PCAP_ERRBUF_SIZE, pcap_fmt_errmsg_for_errno(), pcap::priv, setsockopt(), snprintf(), pcap_linux::tp_hdrlen, and pcap_linux::tp_version.

Referenced by prepare_tpacket_socket().

◆ is_wifi()

static int is_wifi ( const char * device )

static

Definition at line 1738 of file pcap-linux.c.

References stat.

Referenced by get_if_flags(), and map_arphrd_to_dlt().

◆ linux_check_direction()

static int linux_check_direction	(	const pcap_t *	handle,
		const struct sockaddr_ll *	sll
	)

inlinestatic

Definition at line 1123 of file pcap-linux.c.

References pcap::direction, LINUX_SLL_P_CAN, LINUX_SLL_P_CANFD, pcap_linux::lo_ifindex, PCAP_D_IN, PCAP_D_OUT, and pcap::priv.

Referenced by pcap_handle_packet_mmap().

◆ linux_get_stat()

static long long int linux_get_stat	(	const char *	if_name,
		const char *	stat
	)

static

Definition at line 751 of file pcap-linux.c.

References close(), read(), snprintf(), and stat.

Referenced by linux_if_drops().

◆ linux_if_drops()

static long long int linux_if_drops ( const char * if_name )

static

Definition at line 771 of file pcap-linux.c.

References linux_get_stat().

Referenced by pcap_activate_linux(), and pcap_stats_linux().

◆ map_arphrd_to_dlt()

static void map_arphrd_to_dlt	(	pcap_t *	handle,
		int	arptype,
		const char *	device,
		int	cooked_ok
	)

static

Definition at line 1780 of file pcap-linux.c.

References ARPHRD_ATM, ARPHRD_CAN, ARPHRD_CISCO, ARPHRD_DLCI, ARPHRD_FCAL, ARPHRD_FCFABRIC, ARPHRD_FCPL, ARPHRD_FCPP, ARPHRD_FDDI, ARPHRD_FRAD, ARPHRD_IEEE80211, ARPHRD_IEEE80211_PRISM, ARPHRD_IEEE80211_RADIOTAP, ARPHRD_IEEE802154, ARPHRD_IEEE802_TR, ARPHRD_IRDA, ARPHRD_LAPD, ARPHRD_NETLINK, ARPHRD_NONE, ARPHRD_RAWHDLC, ARPHRD_SIT, ARPHRD_VSOCKMON, DLT_ARCNET_LINUX, DLT_AX25_KISS, DLT_C_HDLC, DLT_CHAOS, pcap::dlt_count, DLT_DOCSIS, DLT_EN10MB, DLT_EN3MB, DLT_FC_2, DLT_FC_2_WITH_FRAME_DELIMS, DLT_FDDI, DLT_FRELAY, DLT_IEEE802, DLT_IEEE802_11, DLT_IEEE802_11_RADIO, DLT_IEEE802_15_4_NOFCS, DLT_IP_OVER_FC, DLT_LINUX_IRDA, DLT_LINUX_LAPD, DLT_LINUX_SLL, pcap::dlt_list, DLT_LTALK, DLT_NETLINK, DLT_PRISM_HEADER, DLT_PRONET, DLT_RAW, DLT_VSOCK, iface_dsa_get_proto_info(), is_wifi(), pcap::linktype, and pcap::offset.

Referenced by activate_pf_packet().

◆ pcap_activate_linux()

static int pcap_activate_linux ( pcap_t * handle )

static

Definition at line 959 of file pcap-linux.c.

References activate_pf_packet(), pcap::breakloop_op, pcap::cleanup_op, pcap_opt::device, pcap_linux::device, pcap::errbuf, errno, pcap::fd, pcap::getnonblock_op, iface_bind(), pcap_linux::ifindex, pcap::inject_op, linux_if_drops(), MAXIMUM_SNAPLEN, pcap::oneshot_callback, pcap::opt, pcap_breakloop_linux(), pcap_cleanup_linux(), PCAP_ERRBUF_SIZE, PCAP_ERROR, PCAP_ERROR_NO_SUCH_DEVICE, pcap_fmt_errmsg_for_errno(), pcap_getnonblock_linux(), pcap_inject_linux(), pcap_oneshot_linux(), pcap_protocol(), pcap_read_linux_mmap_v2(), pcap_set_datalink_linux(), pcap_setdirection_linux(), pcap_setfilter_linux(), pcap_setnonblock_linux(), pcap_stats_linux(), PCAP_WARNING_PROMISC_NOTSUP, pcap::priv, pcap_opt::promisc, pcap::read_op, pcap::selectable_fd, pcap::set_datalink_op, pcap::setdirection_op, pcap::setfilter_op, pcap::setnonblock_op, setup_mmapped(), pcap::snapshot, snprintf(), pcap::stats_op, pcap_linux::sysfs_dropped, pcap_opt::timeout, pcap_linux::timeout, and pcap_linux::tp_version.

Referenced by pcap_create_interface().

◆ pcap_breakloop_linux()

static void pcap_breakloop_linux ( pcap_t * handle )

static

Definition at line 940 of file pcap-linux.c.

References pcap_breakloop_common(), pcap_linux::poll_breakloop_fd, pcap::priv, and write().

Referenced by pcap_activate_linux().

◆ pcap_can_set_rfmon_linux()

static int pcap_can_set_rfmon_linux ( pcap_t * handle )

static

Definition at line 709 of file pcap-linux.c.

References pcap_opt::device, and pcap::opt.

Referenced by pcap_create_interface().

◆ pcap_cleanup_linux()

static void pcap_cleanup_linux ( pcap_t * handle )

static

Definition at line 789 of file pcap-linux.c.

References close(), destroy_ring(), pcap_linux::device, pcap::errbuf, pcap::fd, pcap_linux::mondevice, MUST_DELETE_MONIF, pcap_linux::must_do_on_close, pcap_linux::oneshot_buffer, pcap_cleanup_live_common(), pcap_remove_from_pcaps_to_close(), pcap_linux::poll_breakloop_fd, and pcap::priv.

Referenced by pcap_activate_linux().

◆ pcap_create_interface()

pcap_t* pcap_create_interface	(	const char *	device,
		char *	ebuf
	)

Definition at line 340 of file pcap-linux.c.

References pcap::activate_op, pcap::can_set_rfmon_op, errno, pcap_activate_linux(), pcap_can_set_rfmon_linux(), pcap_close(), PCAP_CREATE_COMMON, PCAP_ERRBUF_SIZE, pcap_fmt_errmsg_for_errno(), PCAP_TSTAMP_PRECISION_MICRO, PCAP_TSTAMP_PRECISION_NANO, pcap_linux::poll_breakloop_fd, pcap::priv, pcap::tstamp_precision_count, and pcap::tstamp_precision_list.

◆ pcap_get_ring_frame_status()

static u_int pcap_get_ring_frame_status	(	pcap_t *	handle,
		int	offset
	)

inlinestatic

Definition at line 3395 of file pcap-linux.c.

References __atomic_load_n, thdr::h2, pcap::priv, thdr::raw, RING_GET_FRAME_AT, and pcap_linux::tp_version.

Referenced by pcap_setfilter_linux().

◆ pcap_getnonblock_linux()

static int pcap_getnonblock_linux ( pcap_t * p )

static

Definition at line 3349 of file pcap-linux.c.

References pcap::priv, and pcap_linux::timeout.

Referenced by pcap_activate_linux().

◆ pcap_handle_packet_mmap()

static int pcap_handle_packet_mmap	(	pcap_t *	handle,
		pcap_handler	callback,
		u_char *	user,
		unsigned char *	frame,
		unsigned int	tp_len,
		unsigned int	tp_mac,
		unsigned int	tp_snaplen,
		unsigned int	tp_sec,
		unsigned int	tp_usec,
		int	tp_vlan_tci_valid,
		__u16	tp_vlan_tci,
		__u16	tp_vlan_tpid
	)

static

Definition at line 3757 of file pcap-linux.c.

References bpf_program::bf_insns, pcap::bufsize, pcap_pkthdr::caplen, pcap_linux::cooked, DLT_LINUX_SLL2, pcap::errbuf, pcap::fcode, pcap_linux::filter_in_userland, pcap_pkthdr::len, pcap::linktype, linux_check_direction(), PCAP_ERRBUF_SIZE, pcap_filter_with_aux_data(), pcap::priv, sll2_header::sll2_addr, sll2_header::sll2_halen, sll2_header::sll2_hatype, SLL2_HDR_LEN, sll2_header::sll2_if_index, sll2_header::sll2_pkttype, sll2_header::sll2_protocol, sll2_header::sll2_reserved_mbz, sll_header::sll_addr, SLL_ADDRLEN, sll_header::sll_halen, sll_header::sll_hatype, SLL_HDR_LEN, sll_header::sll_pkttype, sll_header::sll_protocol, pcap::snapshot, snprintf(), pcap_linux::tp_hdrlen, pcap_pkthdr::ts, pcap_linux::vlan_offset, pcap_bpf_aux_data::vlan_tag, VLAN_TAG_LEN, pcap_bpf_aux_data::vlan_tag_present, vlan_tag::vlan_tci, and vlan_tag::vlan_tpid.

Referenced by pcap_read_linux_mmap_v2().

◆ pcap_inject_linux()

static int pcap_inject_linux	(	pcap_t *	handle,
		const void *	buf,
		int	size
	)

static

Definition at line 1217 of file pcap-linux.c.

References pcap_linux::cooked, pcap::errbuf, errno, pcap::fd, pcap_linux::ifindex, PCAP_ERRBUF_SIZE, pcap_fmt_errmsg_for_errno(), pcap_strlcpy(), pcap::priv, and send().

Referenced by pcap_activate_linux().

◆ pcap_lib_version()

const char* pcap_lib_version ( void )

Definition at line 5428 of file pcap-linux.c.

References PCAP_VERSION_STRING.

◆ pcap_oneshot_linux()

static void pcap_oneshot_linux	(	u_char *	user,
		const struct pcap_pkthdr *	h,
		const u_char *	bytes
	)

static

Definition at line 3336 of file pcap-linux.c.

References pcap_pkthdr::caplen, oneshot_userdata::hdr, pcap_linux::oneshot_buffer, oneshot_userdata::pd, oneshot_userdata::pkt, and pcap::priv.

Referenced by pcap_activate_linux().

◆ pcap_platform_finddevs()

int pcap_platform_finddevs	(	pcap_if_list_t *	devlistp,
		char *	errbuf
	)

Definition at line 1699 of file pcap-linux.c.

References add_dev(), any_descr, can_be_bound(), get_if_flags(), pcap_findalldevs_interfaces(), PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE, PCAP_IF_RUNNING, and PCAP_IF_UP.

◆ pcap_protocol()

static int pcap_protocol ( pcap_t * handle )

static

Definition at line 697 of file pcap-linux.c.

References pcap::opt.

Referenced by pcap_activate_linux().

◆ pcap_read_linux_mmap_v2()

static int pcap_read_linux_mmap_v2	(	pcap_t *	handle,
		int	max_packets,
		pcap_handler	callback,
		u_char *	user
	)

static

Definition at line 3984 of file pcap-linux.c.

References pcap_linux::blocks_to_filter_in_userland, pcap::break_loop, pcap::cc, pcap_linux::filter_in_userland, thdr::h2, pcap::offset, pcap::opt, PACKET_COUNT_IS_UNLIMITED, packet_mmap_acquire, packet_mmap_release, PCAP_ERROR_BREAK, pcap_handle_packet_mmap(), PCAP_TSTAMP_PRECISION_NANO, pcap_wait_for_frames_mmap(), pcap::priv, thdr::raw, RING_GET_CURRENT_FRAME, pcap_opt::tstamp_precision, VLAN_TPID, and VLAN_VALID.

Referenced by pcap_activate_linux().

◆ pcap_set_datalink_linux()

static int pcap_set_datalink_linux	(	pcap_t *	handle,
		int	dlt
	)

static

Definition at line 1111 of file pcap-linux.c.

References pcap::linktype.

Referenced by pcap_activate_linux().

◆ pcap_set_protocol_linux()

int pcap_set_protocol_linux	(	pcap_t *	p,
		int	protocol
	)

Definition at line 5416 of file pcap-linux.c.

References pcap::opt, pcap_check_activated(), and PCAP_ERROR_ACTIVATED.

◆ pcap_setdirection_linux()

static int pcap_setdirection_linux	(	pcap_t *	handle,
		pcap_direction_t	d
	)

static

Definition at line 1727 of file pcap-linux.c.

References pcap::direction.

Referenced by pcap_activate_linux().

◆ pcap_setfilter_linux()

static int pcap_setfilter_linux	(	pcap_t *	handle,
		struct bpf_program *	filter
	)

static

Definition at line 4196 of file pcap-linux.c.

References bpf_program::bf_len, pcap_linux::blocks_to_filter_in_userland, pcap::cc, pcap::errbuf, errno, pcap::fcode, pcap_linux::filter_in_userland, fix_program(), install_bpf_program(), pcap::offset, PCAP_ERRBUF_SIZE, pcap_fmt_errmsg_for_errno(), pcap_get_ring_frame_status(), pcap_strerror(), pcap_strlcpy(), pcap::priv, reset_kernel_filter(), and set_kernel_filter().

Referenced by pcap_activate_linux().

◆ pcap_setnonblock_linux()

static int pcap_setnonblock_linux	(	pcap_t *	p,
		int	nonblock
	)

static

Definition at line 3358 of file pcap-linux.c.

References pcap_setnonblock_fd(), pcap::priv, set_poll_timeout(), and pcap_linux::timeout.

Referenced by pcap_activate_linux().

◆ pcap_stats_linux()

static int pcap_stats_linux	(	pcap_t *	handle,
		struct pcap_stat *	stats
	)

static

Definition at line 1259 of file pcap-linux.c.

References pcap_linux::device, pcap::errbuf, errno, pcap::fd, getsockopt(), linux_if_drops(), pcap::opt, PCAP_ERRBUF_SIZE, pcap_fmt_errmsg_for_errno(), pcap::priv, pcap_opt::promisc, pcap_stat::ps_drop, pcap_stat::ps_ifdrop, pcap_stat::ps_recv, pcap_linux::stat, and pcap_linux::sysfs_dropped.

Referenced by pcap_activate_linux().

◆ pcap_wait_for_frames_mmap()

static int pcap_wait_for_frames_mmap ( pcap_t * handle )

static

Definition at line 3418 of file pcap-linux.c.

References pcap::break_loop, pcap_linux::device, device_still_exists(), pcap::errbuf, errno, pcap::fd, getsockopt(), ioctl(), pcap_linux::netdown, netdown_timeout, PCAP_ERRBUF_SIZE, PCAP_ERROR, PCAP_ERROR_BREAK, pcap_fmt_errmsg_for_errno(), pcap_strlcpy(), pcap_linux::poll_breakloop_fd, pcap_linux::poll_timeout, pcap::priv, read(), pcap::required_select_timeout, snprintf(), and pcap_linux::timeout.

Referenced by pcap_read_linux_mmap_v2().

◆ prepare_tpacket_socket()

static int prepare_tpacket_socket ( pcap_t * handle )

static

Definition at line 2786 of file pcap-linux.c.

References pcap::errbuf, pcap_opt::immediate, init_tpacket(), pcap::opt, PCAP_ERRBUF_SIZE, and snprintf().

Referenced by setup_mmapped().

◆ reset_kernel_filter()

static int reset_kernel_filter ( pcap_t * handle )

static

Definition at line 5390 of file pcap-linux.c.

References errno, pcap::fd, and setsockopt().

Referenced by pcap_setfilter_linux(), and set_kernel_filter().

◆ set_dlt_list_cooked()

static void set_dlt_list_cooked	(	pcap_t *	handle,
		int	sock_fd
	)

static

Definition at line 2268 of file pcap-linux.c.

Referenced by activate_pf_packet().

◆ set_kernel_filter()

static int set_kernel_filter	(	pcap_t *	handle,
		struct sock_fprog *	fcode
	)

static

Definition at line 5263 of file pcap-linux.c.

References pcap::errbuf, errno, pcap::fd, PCAP_ERRBUF_SIZE, pcap_fmt_errmsg_for_errno(), recv(), reset_kernel_filter(), setsockopt(), and total_fcode.

Referenced by pcap_setfilter_linux().

◆ set_poll_timeout()

static void set_poll_timeout ( struct pcap_linux * handlep )

static

Definition at line 894 of file pcap-linux.c.

References pcap_linux::poll_timeout, pcap_linux::timeout, and pcap_linux::tp_version.

Referenced by pcap_setnonblock_linux(), and setup_mmapped().

◆ setup_mmapped()

static int setup_mmapped	(	pcap_t *	handle,
		int *	status
	)

static

Definition at line 2657 of file pcap-linux.c.

References pcap_opt::buffer_size, create_ring(), pcap::errbuf, errno, pcap_linux::oneshot_buffer, pcap::opt, PCAP_ERRBUF_SIZE, PCAP_ERROR, pcap_fmt_errmsg_for_errno(), prepare_tpacket_socket(), pcap::priv, set_poll_timeout(), and pcap::snapshot.

Referenced by pcap_activate_linux().

Variable Documentation

◆ any_descr

const char any_descr[] = "Pseudo-device that captures on all interfaces"

static

Definition at line 1387 of file pcap-linux.c.

Referenced by pcap_platform_finddevs().

◆ dsa_protos

struct dsa_proto dsa_protos[]

static

Initial value:

= {
    
    { "none",  1   },
    { "brcm",  281  },
    { "brcm-prepend",  282  },
    { "dsa",  284  },
    { "edsa",  285  },
}

Referenced by iface_dsa_get_proto_info().

◆ netdown_timeout

const struct timeval netdown_timeout

static

Initial value:

= {
    0, 1000     
}

Definition at line 255 of file pcap-linux.c.

Referenced by pcap_wait_for_frames_mmap().

◆ total_fcode

struct sock_fprog total_fcode = { 1, &total_insn }

static

Definition at line 330 of file pcap-linux.c.

Referenced by set_kernel_filter().

◆ total_insn

struct sock_filter total_insn = { (u_short)( 0x06 | 0x00 ), 0, 0, 0 }

static

Definition at line 330 of file pcap-linux.c.

Referenced by pcap_activate_bpf(), and pcap_activate_npf().

Data Structures

Macros

Typedefs

Functions

Variables

Macro Definition Documentation

◆ __atomic_load_n

◆ __atomic_store_n

◆ _GNU_SOURCE

◆ ARPHRD_ATM

◆ ARPHRD_CAN

◆ ARPHRD_CISCO

◆ ARPHRD_DLCI

◆ ARPHRD_FCAL

◆ ARPHRD_FCFABRIC

◆ ARPHRD_FCPL

◆ ARPHRD_FCPP

◆ ARPHRD_FDDI

◆ ARPHRD_FRAD

◆ ARPHRD_IEEE80211

◆ ARPHRD_IEEE80211_PRISM

◆ ARPHRD_IEEE80211_RADIOTAP

◆ ARPHRD_IEEE802154

◆ ARPHRD_IEEE802_TR

◆ ARPHRD_IRDA

◆ ARPHRD_LAPD

◆ ARPHRD_NETLINK

◆ ARPHRD_NONE

◆ ARPHRD_RAWHDLC

◆ ARPHRD_SIT

◆ ARPHRD_VSOCKMON

◆ BIGGER_THAN_ALL_MTUS

◆ MAX

◆ MAX_LINKHEADER_SIZE

◆ MUST_CLEAR_RFMON

◆ MUST_DELETE_MONIF

◆ packet_mmap_acquire

◆ packet_mmap_release

◆ packet_mmap_v3_acquire

◆ packet_mmap_v3_release

◆ RING_GET_CURRENT_FRAME

◆ RING_GET_FRAME_AT

◆ VLAN_TPID

◆ VLAN_VALID

Typedef Documentation

◆ socklen_t

Function Documentation

◆ activate_pf_packet()

◆ can_be_bound()

◆ create_ring()

◆ destroy_ring()

◆ device_still_exists()

◆ enter_rfmon_mode()

◆ fix_offset()

◆ fix_program()

◆ get_if_flags()

◆ get_if_ioctl_socket()

◆ iface_bind()

◆ iface_dsa_get_proto_info()

◆ iface_get_arptype()

◆ iface_get_id()

◆ iface_get_mtu()

◆ iface_get_offload()

◆ init_tpacket()

◆ is_wifi()

◆ linux_check_direction()

◆ linux_get_stat()

◆ linux_if_drops()

◆ map_arphrd_to_dlt()

◆ pcap_activate_linux()

◆ pcap_breakloop_linux()

◆ pcap_can_set_rfmon_linux()

◆ pcap_cleanup_linux()

◆ pcap_create_interface()

◆ pcap_get_ring_frame_status()

◆ pcap_getnonblock_linux()

◆ pcap_handle_packet_mmap()

◆ pcap_inject_linux()

◆ pcap_lib_version()

◆ pcap_oneshot_linux()