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

---

   pcap_lookupdev.3pcap    ( 3 )

---

---

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.

---