firedns_dnsbl_lookup(3)

NAME

firedns_dnsbl_lookup - Create a query to look up an IP in

a DNS-based blacklist

SYNOPSIS

#include <firedns.h>
-lfiredns
int  firedns_dnsbl_lookup(const  struct in_addr *ip, const
char * const name)

DESCRIPTION

firedns_dnsbl_lookup() creates and sends a request to re

solve the TXT record of the entry of ip in the DNS-based black

list name. It returns a file descriptor that should be

select(2)'ed upon (read set). When the file descriptor shows

ready for reading call firedns_getresult(3) to retrieve the re

sults. The result will be a char * with the message from the

listing server, or NULL if the IP address is not listed.

RETURN VALUE

Returns an integer file descriptor that can be used the

same as any other file descriptor. Returns -1 on error.

AUTHOR

Ian Gulliver <ian@penguinhosting.net>

SEE ALSO

libfiredns(3), firedns_getresult(3), select(2)

2002-03-31

firedns_dnsbl_lookup(3)