Manpages - pcap_create.3pcap

pcap_create - create a live capture handle

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

pcap_create*() is used to create a packet capture handle to look at packets on the network. source is a string that specifies the network device to open; on Linux systems with 2.2 or later kernels, a source argument of “any” or *NULL can be used to capture packets from all interfaces.

The returned handle must be activated with *pcap_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.

pcap_create*() returns a pcap_t * on success and *NULL on failure. If NULL is returned, errbuf is filled in with an appropriate error message. errbuf is assumed to be able to hold at least PCAP_ERRBUF_SIZE chars.

*pcap*(3PCAP)