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-.TH IPSEC_INITADDR 3 "11 Sept 2000"
-.SH NAME
-ipsec initaddr \- initialize an ip_address
-.br
-ipsec addrtypeof \- get address type of an ip_address
-.br
-ipsec addrlenof \- get length of address within an ip_address
-.br
-ipsec addrbytesof \- get copy of address within an ip_address
-.br
-ipsec addrbytesptr \- get pointer to address within an ip_address
-.SH SYNOPSIS
-.B "#include <freeswan.h>"
-.sp
-.B "const char *initaddr(const char *src, size_t srclen,"
-.ti +1c
-.B "int af, ip_address *dst);"
-.br
-.B "int addrtypeof(const ip_address *src);"
-.br
-.B "size_t addrlenof(const ip_address *src);"
-.br
-.B "size_t addrbytesof(const ip_address *src,"
-.ti +1c
-.B "unsigned char *dst, size_t dstlen);"
-.br
-.B "size_t addrbytesptr(const ip_address *src,"
-.ti +1c
-.B "const unsigned char **dst);"
-.SH DESCRIPTION
-The
-.B <freeswan.h>
-library uses an internal type
-.I ip_address
-to contain one of the (currently two) types of IP address.
-These functions provide basic tools for creating and examining this type.
-.PP
-.I Initaddr
-initializes a variable
-.I *dst
-of type
-.I ip_address
-from an address
-(in network byte order,
-indicated by a pointer
-.I src
-and a length
-.IR srclen )
-and an address family
-.I af
-(typically
-.B AF_INET
-or
-.BR AF_INET6 ).
-The length must be consistent with the address family.
-.PP
-.I Addrtypeof
-returns the address type of an address,
-normally
-.B AF_INET
-or
-.BR AF_INET6 .
-(The
-.B <freeswan.h>
-header file arranges to include the necessary headers for these
-names to be known.)
-.PP
-.I Addrlenof
-returns the size (in bytes) of the address within an
-.IR ip_address ,
-to permit storage allocation etc.
-.PP
-.I Addrbytesof
-copies the address within the
-.I ip_address
-.I src
-to the buffer indicated by the pointer
-.I dst
-and the length
-.IR dstlen ,
-and returns the address length (in bytes).
-If the address will not fit,
-as many bytes as will fit are copied;
-the returned length is still the full length.
-It is the caller's responsibility to check the
-returned value to ensure that there was enough room.
-.PP
-.I Addrbytesptr
-sets
-.I *dst
-to a pointer to the internal address within the
-.IR ip_address ,
-and returns the address length (in bytes).
-If
-.I dst
-is
-.BR NULL ,
-it just returns the address length.
-The pointer points to
-.B const
-to discourage misuse.
-.PP
-.I Initaddr
-returns
-.B NULL
-for success and
-a pointer to a string-literal error message for failure;
-see DIAGNOSTICS.
-.PP
-The functions which return
-.I size_t
-return
-.B 0
-for a failure.
-.SH SEE ALSO
-inet(3), ipsec_ttoaddr(3)
-.SH DIAGNOSTICS
-An unknown address family is a fatal error for any of these functions
-except
-.IR addrtypeof .
-An address-size mismatch is a fatal error for
-.IR initaddr .
-.SH HISTORY
-Written for the FreeS/WAN project by Henry Spencer.
-.SH BUGS
-.I Addrtypeof
-should probably have been named
-.IR addrfamilyof .