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pcap_open_live(3pcap)

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  in‐
       terfaces.

       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.)

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  mes‐
       sage.   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 warn‐
       ing 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.


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:

       box; cbp-1 | cbp-1 l | l .  ATTRIBUTE TYPE ATTRIBUTE VALUE = Availabil‐
       ity   system/library/libpcap = Stability Uncommitted

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



NOTES
       Source code for open source software components in Oracle  Solaris  can
       be found at https://www.oracle.com/downloads/opensource/solaris-source-
       code-downloads.html.

       This software was built from source available at:
       https://github.com/oracle/solaris-userland

       The original community source was downloaded from:
       https://www.tcpdump.org/release/libpcap-1.10.4.tar.gz

       Further information about this software can be found on the open source
       community website at https://www.tcpdump.org/.

                                6 December 2017          PCAP_OPEN_LIVE(3pcap)
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