.\" Copyright 2004 The Aerospace Corporation. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions, and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions, and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. The name of The Aerospace Corporation may not be used to endorse or .\" promote products derived from this software. .\" .\" THIS SOFTWARE IS PROVIDED BY THE AEROSPACE CORPORATION "AS IS" AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AEROSPACE CORPORATION BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" Copyright (c) 1995 .\" Bill Paul . All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by Bill Paul. .\" 4. Neither the name of the author nor the names of any co-contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" $FreeBSD: head/lib/libc/net/eui64.3 231196 2012-02-08 11:30:13Z brooks $ .\" .Dd March 4, 2004 .Dt EUI64 3 .Os .Sh NAME .Nm eui64 , .\" .Nm eui64_line , .Nm eui64_aton , .Nm eui64_ntoa , .Nm eui64_ntohost , .Nm eui64_hostton .Nd IEEE EUI-64 conversion and lookup routines .Sh LIBRARY .Lb libc .Sh SYNOPSIS .In sys/types.h .In sys/eui64.h .\" .Ft int .\" .Fn eui64_line "const char *l" "struct eui64 *e" "char *hostname" "size_t len" .Ft int .Fn eui64_aton "const char *a" "struct eui64 *e" .Ft int .Fn eui64_ntoa "const struct eui64 *id" "char *a" "size_t len" .Ft int .Fn eui64_ntohost "char *hostname" "size_t len" "const struct eui64 *id" .Ft int .Fn eui64_hostton "const char *hostname" "struct eui64 *id" .Sh DESCRIPTION These functions operate on IEEE EUI-64s using an .Vt eui64 structure, which is defined in the header file .In sys/eui64.h : .Bd -literal -offset indent /* * The number of bytes in an EUI-64. */ #define EUI64_LEN 8 /* * Structure of an IEEE EUI-64. */ struct eui64 { u_char octet[EUI64_LEN]; }; .Ed .\" .Pp .\" The function .\" .Fn eui64_line .\" scans .\" .Fa l , .\" an .\" .Tn ASCII .\" string in .\" .Xr eui64 5 .\" format and sets .\" .Fa e .\" to the EUI-64 specified in the string and .\" .Fa h .\" to the hostname. .\" This function is used to parse lines from .\" .Pa /etc/eui64 .\" into their component parts. .Pp The .Fn eui64_aton function converts an .Tn ASCII representation of an EUI-64 into an .Vt eui64 structure. Likewise, .Fn eui64_ntoa converts an EUI-64 specified as an .Vt eui64 structure into an .Tn ASCII string. .Pp The .Fn eui64_ntohost and .Fn eui64_hostton functions map EUI-64s to their corresponding hostnames as specified in the .Pa /etc/eui64 database. The .Fn eui64_ntohost function converts from EUI-64 to hostname, and .Fn eui64_hostton converts from hostname to EUI-64. .Sh RETURN VALUES .\" The .\" .Fn eui64_line .\" function .\" returns zero on success and non-zero if it was unable to parse .\" any part of the supplied line .\" .Fa l . .\" It returns the extracted EUI-64 in the supplied .\" .Vt eui64 .\" structure .\" .Fa e .\" and the hostname in the supplied string .\" .Fa h . .\" .Pp On success, .Fn eui64_ntoa returns a pointer to a string containing an .Tn ASCII representation of an EUI-64. If it is unable to convert the supplied .Vt eui64 structure, it returns a .Dv NULL pointer. Likewise, .Fn eui64_aton returns a pointer to an .Vt eui64 structure on success and a .Dv NULL pointer on failure. .Pp The .Fn eui64_ntohost and .Fn eui64_hostton functions both return zero on success or non-zero if they were unable to find a match in the .Pa /etc/eui64 database. .Sh NOTES The user must ensure that the hostname strings passed to the .\" .Fn eui64_line , .Fn eui64_ntohost and .Fn eui64_hostton functions are large enough to contain the returned hostnames. .Sh NIS INTERACTION If the .Pa /etc/eui64 contains a line with a single .Ql + in it, the .Fn eui64_ntohost and .Fn eui64_hostton functions will attempt to consult the NIS .Pa eui64.byname and .Pa eui64.byid maps in addition to the data in the .Pa /etc/eui64 file. .Sh SEE ALSO .Xr firewire 4 , .Xr eui64 5 , .Xr yp 8 .Sh HISTORY These functions first appears in .Fx 5.3 . They are derived from the .Xr ethers 3 family of functions.