diff options
Diffstat (limited to 'contrib/libpcap/pcap_lookupnet.3pcap')
| -rw-r--r-- | contrib/libpcap/pcap_lookupnet.3pcap | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/contrib/libpcap/pcap_lookupnet.3pcap b/contrib/libpcap/pcap_lookupnet.3pcap index c12fa55ed5ac..5decea579993 100644 --- a/contrib/libpcap/pcap_lookupnet.3pcap +++ b/contrib/libpcap/pcap_lookupnet.3pcap @@ -17,7 +17,7 @@ .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. .\" -.TH PCAP_LOOKUPNET 3PCAP "25 July 2018" +.TH PCAP_LOOKUPNET 3PCAP "13 March 2024" .SH NAME pcap_lookupnet \- find the IPv4 network number and netmask for a device .SH SYNOPSIS @@ -33,8 +33,7 @@ char errbuf[PCAP_ERRBUF_SIZE]; .LP .ft B int pcap_lookupnet(const char *device, bpf_u_int32 *netp, -.ti +8 -bpf_u_int32 *maskp, char *errbuf); + bpf_u_int32 *maskp, char *errbuf); .ft .fi .SH DESCRIPTION @@ -47,8 +46,18 @@ Both and .I maskp are -.I bpf_u_int32 +.B bpf_u_int32 pointers. +.I errbuf +is a buffer large enough to hold at least +.B PCAP_ERRBUF_SIZE +chars. +.LP +This function is not available on Windows. It supports neither IPv6 nor +multiple IPv4 addresses per interface, which obviously is not practical in +modern networks. See +.BR pcap_findalldevs (3PCAP) +for a more elaborate solution to the problem. .SH RETURN VALUE .BR pcap_lookupnet () returns @@ -60,9 +69,5 @@ on failure. If is returned, .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 .BR pcap (3PCAP) |