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.TH dns_name4 3
dns_name4 \- look up host name
.B #include <dns.h>
int \fBdns_name4\fP(stralloc* \fIout\fR,const char* \fIip\fR[4]);
dns_name4 looks up the domain name for the 4-byte IP address in \fIip\fR. It
puts the (first) domain name into \fIout\fR and returns 0. If the relevant domain does not exist in DNS, or has no PTR records, \fIout\fR
will be empty.
If dns_name4 has trouble with the DNS lookup or runs out of memory, it returns
-1, setting errno appropriately. It may or may not change \fIout\fR.
dns_name_packet(3), dns_name4_domain(3), dns_name6(3), dns_ip4(3)