Страницы справочника OS X

Эта страница руководства является частью версии 5.0 Инструментов XCode

Читать страницы руководства

PCAP_OPEN_LIVE(3PCAP)                                                                  PCAP_OPEN_LIVE(3PCAP)



NAME
       pcap_open_live - open a device for capturing

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);

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 if the interface is to be put into promiscuous mode.

       to_ms specifies the read timeout in milliseconds.

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 zerolength
       length string.  errbuf is assumed to be able to hold at least PCAP_ERRBUF_SIZE chars.

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



                                                5 April 2008                           PCAP_OPEN_LIVE(3PCAP)