Путеводитель по Руководству Linux

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



   pcap_lookupdev.3pcap    ( 3 )

найти устройство по умолчанию для захвата (find the default device on which to capture)

Имя (Name)

pcap_lookupdev - find the default device on which to capture

Синопсис (Synopsis)

#include <pcap/pcap.h>

char errbuf[PCAP_ERRBUF_SIZE];

[DEPRECATED] char *pcap_lookupdev(char *errbuf);


Описание (Description)

This interface is obsoleted by pcap_findalldevs(3PCAP).  To find
       a default device on which to capture, call pcap_findalldevs()
       and, if the list it returns is not empty, use the first device in
       the list.  (If the list is empty, there are no devices on which
       capture is possible.)

If pcap_init(3PCAP) has been called, this interface always returns NULL.

pcap_lookupdev() returns a pointer to a string giving the name of a network device suitable for use with pcap_create(3PCAP) and pcap_activate(3PCAP), or with pcap_open_live(3PCAP), and with pcap_lookupnet(3PCAP). If there is an error, or if pcap_init(3PCAP) has been called, NULL is returned and errbuf is filled in with an appropriate error message. errbuf is assumed to be able to hold at least PCAP_ERRBUF_SIZE chars.


Смотри также (See also)

pcap(3PCAP)

Ошибки (баги) (Bugs)

The pointer returned by pcap_lookupdev() points to a static
       buffer; subsequent calls to pcap_lookupdev() in the same thread,
       or calls to pcap_lookupdev() in another thread, may overwrite
       that buffer.

In WinPcap and Npcap, this function may return a UTF-16 string rather than an ASCII or UTF-8 string.