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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) |