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pcap_set_promisc(3) [netbsd man page]

PCAP_SET_PROMISC(3)					     Library Functions Manual					       PCAP_SET_PROMISC(3)

NAME
pcap_set_promisc - set promiscuous mode for a not-yet-activated capture handle SYNOPSIS
#include <pcap/pcap.h> int pcap_set_promisc(pcap_t *p, int promisc); DESCRIPTION
pcap_set_promisc() sets whether promiscuous mode should be set on a capture handle when the handle is activated. If promisc is non-zero, promiscuous mode will be set, otherwise it will not be set. RETURN VALUE
pcap_set_promisc() returns 0 on success or PCAP_ERROR_ACTIVATED if called on a capture handle that has been activated. SEE ALSO
pcap(3), pcap_create(3), pcap_activate(3) 5 April 2008 PCAP_SET_PROMISC(3)

Check Out this Related Man Page

PCAP_ACTIVATE(3PCAP)													      PCAP_ACTIVATE(3PCAP)

NAME
pcap_activate - activate a capture handle SYNOPSIS
#include <pcap/pcap.h> int pcap_activate(pcap_t *p); DESCRIPTION
pcap_activate() is used to activate a packet capture handle to look at packets on the network, with the options that were set on the handle being in effect. RETURN VALUE
pcap_activate() returns 0 on success without warnings, PCAP_WARNING_PROMISC_NOTSUP on success on a device that doesn't support promiscuous mode if promiscuous mode was requested, PCAP_WARNING_TSTAMP_TYPE_NOTSUP on success if the time stamp type specified in a previous pcap_set_tstamp_type() call isn't supported by the capture source (the time stamp type is left as the default), PCAP_WARNING on success with any other warning, PCAP_ERROR_ACTIVATED if the handle has already been activated, PCAP_ERROR_NO_SUCH_DEVICE if the capture source specified when the handle was created doesn't exist, PCAP_ERROR_PERM_DENIED if the process doesn't have permission to open the capture source, PCAP_ERROR_PROMISC_PERM_DENIED if the process has permission to open the capture source but doesn't have permission to put it into promiscuous mode, PCAP_ERROR_RFMON_NOTSUP if monitor mode was specified but the capture source doesn't support monitor mode, PCAP_ERROR_IFACE_NOT_UP if the capture source is not up, and PCAP_ERROR if another error occurred. If PCAP_WARNING or PCAP_ERROR is returned, pcap_geterr() or pcap_perror() may be called with p as an argument to fetch or display a message describing the warning or error. If PCAP_WARNING_PROMISC_NOTSUP, PCAP_ERROR_NO_SUCH_DEVICE, or PCAP_ERROR_PERM_DENIED is returned, pcap_geterr() or pcap_perror() may be called with p as an argument to fetch or display an message giving additional details about the problem that might be useful for debugging the problem if it's unexpected. SEE ALSO
pcap(3PCAP) 5 April 2008 PCAP_ACTIVATE(3PCAP)
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