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| .TH PCAP_LOOKUPDEV 3PCAP "5 April 2008" |
| .SH NAME |
| pcap_lookupdev \- find the default device on which to capture |
| .SH SYNOPSIS |
| .nf |
| .ft B |
| #include <pcap/pcap.h> |
| .ft |
| .LP |
| .nf |
| .ft B |
| char errbuf[PCAP_ERRBUF_SIZE]; |
| .ft |
| .LP |
| .ft B |
| char *pcap_lookupdev(char *errbuf); |
| .ft |
| .fi |
| .SH DESCRIPTION |
| .B pcap_lookupdev() |
| returns a pointer to a string giving the name of a network device |
| suitable for use with |
| .B pcap_create() |
| and |
| .BR pcap_activate() , |
| or with |
| .BR pcap_open_live() , |
| and with |
| .BR pcap_lookupnet() . |
| If there is an error, |
| .B NULL |
| is returned and |
| .I errbuf |
| is filled in with an appropriate error message. |
| .I errbuf |
| is assumed to be able to hold at least |
| .B PCAP_ERRBUF_SIZE |
| chars. |
| .SH SEE ALSO |
| pcap(3PCAP), pcap_create(3PCAP), pcap_activate(3PCAP), |
| pcap_open_live(3PCAP), pcap_lookupnet(3PCAP) |