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   pcap_open_live.3pcap    ( 3 )

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Имя (Name)

pcap_open_live - open a device for capturing

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Синопсис (Synopsis)

#include <pcap/pcap.h>

       char errbuf[PCAP_ERRBUF_SIZE];

       pcap_t *pcap_open_live(const char *device, int snaplen,
               int promisc, int to_ms, char *errbuf);

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Описание (Description)

pcap_open_live() is used to obtain a packet capture handle to
       look at packets on the network.  device is a string that
       specifies the network device to open; on Linux systems with 2.2
       or later kernels, a device argument of "any" or NULL can be used
       to capture packets from all interfaces.

       snaplen specifies the snapshot length to be set on the handle.

       promisc specifies whether the interface is to be put into
       promiscuous mode.  If promisc is non-zero, promiscuous mode will
       be set, otherwise it will not be set.

       to_ms specifies the packet buffer timeout, as a non-negative
       value, in milliseconds.  (See pcap(3PCAP) for an explanation of
       the packet buffer timeout.)

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Возвращаемое значение (Return value)

pcap_open_live() returns a pcap_t * on success and NULL on
       failure.  If NULL is returned, errbuf is filled in with an
       appropriate error message.  errbuf may also be set to warning
       text when pcap_open_live() succeeds; to detect this case the
       caller should store a zero-length string in errbuf before calling
       pcap_open_live() and display the warning to the user if errbuf is
       no longer a zero-length string.  errbuf is assumed to be able to
       hold at least PCAP_ERRBUF_SIZE chars.

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Смотри также (See also)

pcap_create(3PCAP), pcap_activate(3PCAP)

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