osx man page for pcap_set_buffer_size

PCAP_SET_BUFFER_SIZE(3PCAP)											       PCAP_SET_BUFFER_SIZE(3PCAP)

NAME
       pcap_set_buffer_size - set the buffer size for a not-yet-activated capture handle

SYNOPSIS
       #include <pcap/pcap.h>

       int pcap_set_buffer_size(pcap_t *p, int buffer_size);

DESCRIPTION
       pcap_set_buffer_size()  sets the buffer size that will be used on a capture handle when the handle is activated to buffer_size, which is in
       units of bytes.

RETURN VALUE
       pcap_set_buffer_size() returns 0 on success or PCAP_ERROR_ACTIVATED if called on a capture handle that has been activated.

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

								   5 April 2008 				       PCAP_SET_BUFFER_SIZE(3PCAP)