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.\" $Id: krb5_address.3,v 1.4 2003/04/16 13:58:12 lha Exp $
.\" 
.Dd March 11, 2002
.Dt KRB5_ADDRESS 3
.Os HEIMDAL
.Sh NAME
.Nm krb5_address ,
.Nm krb5_addresses ,
.Nm krb5_sockaddr2address ,
.Nm krb5_sockaddr2port ,
.Nm krb5_addr2sockaddr ,
.Nm krb5_max_sockaddr_size ,
.Nm krb5_sockaddr_uninteresting ,
.Nm krb5_h_addr2sockaddr ,
.Nm krb5_h_addr2addr ,
.Nm krb5_anyaddr ,
.Nm krb5_print_address ,
.Nm krb5_parse_address ,
.Nm krb5_address_order ,
.Nm krb5_address_compare ,
.Nm krb5_address_search ,
.Nm krb5_free_address ,
.Nm krb5_free_addresses ,
.Nm krb5_copy_address ,
.Nm krb5_copy_addresses ,
.Nm krb5_append_addresses ,
.Nm krb5_make_addrport
.Nd mange addresses in Kerberos.
.Sh LIBRARY
Kerberos 5 Library (libkrb5, -lkrb5)
.Sh SYNOPSIS
.In krb5.h
.Pp
.Ft krb5_error_code
.Fo krb5_sockaddr2address
.Fa "krb5_context context"
.Fa "const struct sockaddr *sa"
.Fa "krb5_address *addr"
.Fc
.Ft krb5_error_code
.Fo krb5_sockaddr2port
.Fa "krb5_context context"
.Fa "const struct sockaddr *sa"
.Fa "int16_t *port"
.Fc
.Ft krb5_error_code
.Fo krb5_addr2sockaddr
.Fa "krb5_context context"
.Fa "const krb5_address *addr"
.Fa "struct sockaddr *sa"
.Fa "krb5_socklen_t *sa_size"
.Fa "int port"
.Fc
.Ft size_t
.Fo krb5_max_sockaddr_size
.Fa "void"
.Fc
.Ft "krb5_boolean"
.Fo krb5_sockaddr_uninteresting
.Fa "const struct sockaddr *sa"
.Fc
.Ft krb5_error_code
.Fo krb5_h_addr2sockaddr
.Fa "krb5_context context"
.Fa "int af"
.Fa "const char *addr"
.Fa "struct sockaddr *sa"
.Fa "krb5_socklen_t *sa_size"
.Fa "int port"
.Fc
.Ft krb5_error_code
.Fo krb5_h_addr2addr
.Fa "krb5_context context"
.Fa "int af"
.Fa "const char *haddr"
.Fa "krb5_address *addr"
.Fc
.Ft krb5_error_code
.Fo krb5_anyaddr
.Fa "krb5_context context"
.Fa "int af"
.Fa "struct sockaddr *sa"
.Fa "krb5_socklen_t *sa_size"
.Fa "int port"
.Fc
.Ft krb5_error_code
.Fo krb5_print_address
.Fa "const krb5_address *addr"
.Fa "char *str"
.Fa "size_t len"
.Fa "size_t *ret_len"
.Fc
.Ft krb5_error_code
.Fo krb5_parse_address
.Fa "krb5_context context"
.Fa "const char *string"
.Fa "krb5_addresses *addresses"
.Fc
.Ft int
.Fo "krb5_address_order"
.Fa "krb5_context context"
.Fa "const krb5_address *addr1"
.Fa "const krb5_address *addr2"
.Fc
.Ft "krb5_boolean"
.Fo krb5_address_compare
.Fa "krb5_context context"
.Fa "const krb5_address *addr1"
.Fa "const krb5_address *addr2"
.Fc
.Ft "krb5_boolean"
.Fo krb5_address_search
.Fa "krb5_context context"
.Fa "const krb5_address *addr"
.Fa "const krb5_addresses *addrlist"
.Fc
.Ft krb5_error_code
.Fo krb5_free_address
.Fa "krb5_context context"
.Fa "krb5_address *address"
.Fc
.Ft krb5_error_code
.Fo krb5_free_addresses
.Fa "krb5_context context"
.Fa "krb5_addresses *addresses"
.Fc
.Ft krb5_error_code
.Fo krb5_copy_address
.Fa "krb5_context context"
.Fa "const krb5_address *inaddr"
.Fa "krb5_address *outaddr"
.Fc
.Ft krb5_error_code
.Fo krb5_copy_addresses
.Fa "krb5_context context"
.Fa "const krb5_addresses *inaddr"
.Fa "krb5_addresses *outaddr"
.Fc
.Ft krb5_error_code
.Fo krb5_append_addresses
.Fa "krb5_context context"
.Fa "krb5_addresses *dest"
.Fa "const krb5_addresses *source"
.Fc
.Ft krb5_error_code
.Fo krb5_make_addrport
.Fa "krb5_context context"
.Fa "krb5_address **res"
.Fa "const krb5_address *addr"
.Fa "int16_t port"
.Fc
.Sh DESCRIPTION
The
.Li krb5_address
structure holds a address that can be used in Kerberos API
calls. There are help functions to set and extract address information
of the address.
.Pp
The
.Li krb5_addresses
structure holds a set of krb5_address:es.
.Pp
.Fn krb5_sockaddr2address
stores a address a 
.Li "struct sockaddr"
.Fa sa
in the krb5_address
.Fa addr .
.Pp
.Fn krb5_sockaddr2port
extracts a
.Fa port
(if possible) from a
.Li "struct sockaddr"
.Fa sa .
.Pp
.Fn krb5_addr2sockaddr
sets the
struct sockaddr
.Fa sockaddr
from
.Fa addr
and
.Fa port .
.Fa Sa_size
should be initially contain the size of the
.Fa sa ,
and after the call, it will contain the actual length of the address.
.Pp
.Fn krb5_max_sockaddr_size
returns the max size of the
.Li struct sockaddr
that the Kerberos library will return.
.Pp
.Fn krb5_sockaddr_uninteresting
returns
.Dv TRUE
for all
.Fa sa
that for that the kerberos library thinks are uninteresting.
One example are link local addresses.
.Pp
.Fn krb5_h_addr2sockaddr
initializes a
.Li "struct sockaddr"
.Fa sa
from
.Fa af
and the
.Li "struct hostent"
(see
.Xr gethostbyname 3 )
.Fa h_addr_list 
component.
.Fa Sa_size
should be initially contain the size of the
.Fa sa ,
and after the call, it will contain the actual length of the address.
.Fa sa
argument.
.Pp
.Fn krb5_h_addr2addr
works like
.Fn krb5_h_addr2sockaddr
with the exception that it operates on a
.Li krb5_address
instead of a
.Li struct sockaddr
.Pp
.Fn krb5_anyaddr
fills in a
.Li "struct sockaddr"
.Fa sa
that can be used to
.Xf bind 3
to.
.Fa Sa_size
should be initially contain the size of the
.Fa sa ,
and after the call, it will contain the actual length of the address.
.Pp
.Fn krb5_print_address
prints the address in
.Fa addr
to the a string
.Fa string
that have the length
.Fa len .
If
.Fa ret_len
if not
.Dv NULL ,
it will be filled in length of the string.
.Pp
.Fn krb5_parse_address
Returns the resolving a hostname in
.Fa string
to the
.Li krb5_addresses
.Fa addresses .
.Pp
.Fn krb5_address_order
compares to addresses
.Fa addr1
and
.Fa addr2
so that it can be used for sorting addresses. If the addresses are the
same address
.Fa krb5_address_order will be return 0.
.Pp
.Fn krb5_address_compare
compares the addresses
.Fa addr1
and
.Fa addr2 .
returns
.Dv TRUE
if the two addresses are the same.
.Pp
.Fn krb5_address_search
checks if the address
.Fa addr
is a member of the address set list
.Fa addrlist .
.Pp
.Fn krb5_free_address
frees the data stored in the
.Fa address
that is alloced with any of the krb5_address functions.
.Pp
.Fn krb5_free_addresses
frees the data stored in the
.Fa addresses
that is alloced with any of the krb5_address functions.
.Pp
.Fn krb5_copy_address
copies the content of address
.Fa inaddr
to
.Fa outaddr .
.Pp
.Fn krb5_copy_addresses
copies the content of the address list
.Fa inaddr
to
.Fa outaddr .
.Pp
.Fn krb5_append_addresses
adds the set of addresses in
.Fa source
to
.Fa dest .
While copying the addresses, duplicates are also sorted out.
.Pp
.Fn krb5_make_addrport
allocates and creates an 
krb5_address in
.Fa res
of type KRB5_ADDRESS_ADDRPORT from
.Fa ( addr , port ) .
.Sh SEE ALSO
.Xr krb5 3 ,
.Xr krb5.conf 5 ,
.Xr kerberos 8