hosts_access.3 (2010 09)

hosts_access(3) hosts_access(3)

contain valid data or STRING_UNKNOWN

. hosts_ctl() returns zero if access should be denied.

The allow_severity and deny_severity variables determine how accepted and rejected requests may be

logged. They must be provided by the caller and may be modiﬁed by rules in the access control tables.

The rfc931_timeout variable determines the timeout value for the client’s username lookup. It must be

set with a positive value and a value of 0 disables the username lookup.

RETURN VALUE

The

request_init()

and request_set()

functions return a pointer to the request_info struc-

ture. The members of the returned structure are initialized and updated with the values passed to the

respective functions,

request_init()

and request_set()

The

hosts_access()

and hosts_ctl() functions return 1 if the access is granted and

0 if the

access is denied, for the requested service.

DIAGNOSTICS

Problems are reported via

syslogd, the syslog daemon, at info, notice, warning and err lev-

els.

WARNINGS

hosts_access() uses the

strtok() library function. This may interfere with other code that relies

strtok().

AUTHOR

These routines were developed by

Wietse Venema (wietse@wzv.win.tue.nl)

Department of Mathematics and Computing Science

Eindhoven University of Technology

Den Dolech 2, P.O. Box 513,

5600 MB Eindhoven, The Netherlands

FILES

/etc/hosts.allow access control tables.

/etc/hosts.deny access control tables.