Путеводитель по Руководству Linux

  User  |  Syst  |  Libr  |  Device  |  Files  |  Other  |  Admin  |  Head  |



   pcap_set_protocol_linux.3pcap    ( 3 )

установить протокол захвата для еще не активированного дескриптора захвата (set capture protocol for a not-yet-activated capture handle)

Имя (Name)

pcap_set_protocol_linux - set capture protocol for a not-yet-
       activated capture handle

Синопсис (Synopsis)

#include <pcap/pcap.h>

int pcap_set_protocol_linux(pcap_t *p, int protocol);


Описание (Description)

On network interface devices on Linux, pcap_set_protocol_linux()
       sets the protocol to be used in the socket(2) call to create a
       capture socket when the handle is activated.  The argument is a
       link-layer protocol value, such as the values in the
       <linux/if_ether.h> header file, specified in host byte order.  If
       protocol is non-zero, packets of that protocol will be captured
       when the handle is activated, otherwise, all packets will be
       captured.  This function is only provided on Linux, and, if it is
       used on any device other than a network interface, it will have
       no effect.

It should not be used in portable code; instead, a filter should be specified with pcap_setfilter(3PCAP).

If a given network interface provides a standard link-layer header, with a standard packet type, but provides some packet types with a different socket-layer protocol type from the one in the link-layer header, that packet type cannot be filtered with a filter specified with pcap_setfilter() but can be filtered by specifying the socket-layer protocol type using pcap_set_protocol_linux().


Возвращаемое значение (Return value)

pcap_set_protocol_linux() returns 0 on success or
       PCAP_ERROR_ACTIVATED if called on a capture handle that has been
       activated.

Обратная совместимость (Backward compatibility)

This function became available in libpcap release 1.9.0.

Смотри также (See also)

pcap(3PCAP), pcap_create(3PCAP), pcap_activate(3PCAP)