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/*
* $Id$
*/
/************************************************************************
* *
* Copyright (C) 2002 *
* Internet2 *
* All Rights Reserved *
* *
************************************************************************/
/*
* File: saddr.h
*
* Author: Jeff W. Boote
* Internet2
*
* Date: Tue Nov 26 11:09:26 MST 2002
*
* Description:
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#ifndef _i2_saddr_h_
#define _i2_saddr_h_
#include <I2util/util.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
BEGIN_C_DECLS
#define I2SADDR_ADDR (0x1)
#define I2SADDR_PORT (I2SADDR_ADDR<<1)
#define I2SADDR_ALL (I2SADDR_ADDR|I2SADDR_PORT)
/*
* I2SockAddrEqual
* This function is used to compare to sockaddrs. chk_what is used
* to determine which parts of the sockaddr to look at when comparing.
* (The above #define's are used to indicate this.)
*
* returns:
* >0: true
* ==0: false
* <0: error
*/
extern int
I2SockAddrEqual(
const struct sockaddr *sa1,
socklen_t sa1_len,
const struct sockaddr *sa2,
socklen_t sa2_len,
uint32_t chk_what
);
/*
* I2SockAddrIsLoopback
* This function is used to determine if the given sockaddr is
* a loopback. It currently supports IPv4/IPv6.
*
* returns:
* >0: true
* ==0: false
* <0: error
*/
extern int
I2SockAddrIsLoopback(
const struct sockaddr *sa1,
socklen_t sa1_len
);
/*
* This union is used to remove questionable (struct sockaddr*) type punning.
*
* If the socket API is ported to the host OS properly - the alignment of
* all the elements should match between these at least sa and (sin or sin6)
* - but I believe this is more C99 compliant.
*
* This union needs to contain each sockaddr_XXX type that is used
* in the saddr.c and addr.c functions.
*/
typedef union _I2SockUnion {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
struct sockaddr_storage sas;
} I2SockUnion;
/*
* I2SockAddrToSockUnion
* This function is used to allow all other functions to deal with
* sockaddrs through a union therefore removing 'aliasing' issues
* introduced with C99.
*/
extern I2SockUnion *
I2SockAddrToSockUnion(
const struct sockaddr *sa,
socklen_t sa_len,
I2SockUnion *sau_mem
);
/*
* I2SockUnionToSockAddr
* This function is used to return a sockaddr union as a simple sockaddr
* when returning the content to the user.
*/
extern struct sockaddr *
I2SockUnionToSockAddr(
const I2SockUnion *sau,
socklen_t *sa_len_in_out,
struct sockaddr *sa_mem
);
END_C_DECLS
#endif /* _i2_saddr_h_ */
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