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pcap_create(3pcap) — Linux manual page

PCAP_CREATE(3PCAP)PCAP_CREATE(3PCAP)

NAME        top

       pcap_create - create a live capture handle

SYNOPSIS        top

#include <pcap/pcap.h>char errbuf[PCAP_ERRBUF_SIZE];pcap_t *pcap_create(const char *source, char *errbuf);

DESCRIPTION        top

pcap_create() is used to create a packet capture handle to capture       packets on a device (typically a network interface, seepcap_findalldevs(3PCAP) for a more detailed explanation).source       is a string that specifies the capture device to open, in this       functionNULLmeans the same as the string "any".errbuf is a       buffer large enough to hold at leastPCAP_ERRBUF_SIZEchars.       The returned handle must be activated withpcap_activate(3PCAP)       before packets can be captured with it; options for the capture,       such as promiscuous mode, can be set on the handle before       activating it.

RETURN VALUE        top

pcap_create() returns apcap_t *on success andNULLon failure.       IfNULLis returned,errbuf is filled in with an appropriate error       message.

SEE ALSO        top

pcap(3PCAP)

COLOPHON        top

       This page is part of thelibpcap (packet capture library) project.       Information about the project can be found at        ⟨http://www.tcpdump.org/⟩.  If you have a bug report for this       manual page, see ⟨http://www.tcpdump.org/#patches⟩.  This page was       obtained from the project's upstream Git repository       ⟨https://github.com/the-tcpdump-group/libpcap.git⟩ on 2025-08-11.       (At that time, the date of the most recent commit that was found       in the repository was 2025-08-10.)  If you discover any rendering       problems in this HTML version of the page, or you believe there is       a better or more up-to-date source for the page, or you have       corrections or improvements to the information in this COLOPHON       (which isnot part of the original manual page), send a mail to       man-pages@man7.org                              11 March 2025PCAP_CREATE(3PCAP)

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