../svn-commit.tmp
This commit is contained in:
Martin Willi
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/**
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* @file host.c
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*
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* @brief Implementation of host_t.
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*
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*/
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/*
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* Copyright (C) 2005 Jan Hutter, Martin Willi
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "host.h"
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#include <utils/allocator.h>
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typedef struct private_host_t private_host_t;
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/**
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* @brief Private Data of a host object.
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*/
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struct private_host_t {
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/**
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* Public data
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*/
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host_t public;
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/**
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* Address family to use, such as AF_INET or AF_INET6
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*/
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int family;
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/**
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* string representation of host
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*/
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char *string;
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/**
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* low-lewel structure, wich stores the address
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*/
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union {
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struct sockaddr address;
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struct sockaddr_in address4;
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};
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/**
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* length of address structure
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*/
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socklen_t socklen;
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};
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/**
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* implements host_t.get_sockaddr
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*/
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static sockaddr_t *get_sockaddr(private_host_t *this)
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{
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return &(this->address);
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}
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/**
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* implements host_t.get_sockaddr_len
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*/
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static socklen_t *get_sockaddr_len(private_host_t *this)
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{
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return &(this->socklen);
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}
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/**
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* Implementation of host_t.is_default_route.
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*/
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static bool is_default_route (private_host_t *this)
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{
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switch (this->family)
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{
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case AF_INET:
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{
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static u_int8_t default_route[4] = {0x00,0x00,0x00,0x00};
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if (memcmp(default_route,&(this->address4.sin_addr.s_addr),4) == 0)
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{
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return TRUE;
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}
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return FALSE;
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}
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default:
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{
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/* empty chunk is returned */
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return FALSE;
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}
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}
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}
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/**
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* implements host_t.get_address
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*/
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static char *get_address(private_host_t *this)
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{
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switch (this->family)
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{
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case AF_INET:
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{
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char *string;
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/* we need to clone it, since inet_ntoa overwrites
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* internal buffer on subsequent calls
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*/
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allocator_free(this->string);
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string = inet_ntoa(this->address4.sin_addr);
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this->string = allocator_alloc(strlen(string)+1);
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strcpy(this->string, string);
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return this->string;
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}
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default:
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{
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return "(family not supported)";
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}
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}
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}
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/**
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* Implementation of host_t.get_address_as_chunk.
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*/
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static chunk_t get_address_as_chunk(private_host_t *this)
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{
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chunk_t address = CHUNK_INITIALIZER;
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switch (this->family)
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{
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case AF_INET:
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{
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/* allocate 4 bytes for IPV4 address*/
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address.ptr = allocator_alloc(4);
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address.len = 4;
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memcpy(address.ptr,&(this->address4.sin_addr.s_addr),4);
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}
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default:
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{
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/* empty chunk is returned */
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return address;
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}
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}
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}
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static xfrm_address_t get_xfrm_addr(private_host_t *this)
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{
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switch (this->family)
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{
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case AF_INET:
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{
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return (xfrm_address_t)(this->address4.sin_addr.s_addr);
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}
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default:
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{
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/* todo */
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return (xfrm_address_t)(this->address4.sin_addr.s_addr);
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}
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}
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}
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static int get_family(private_host_t *this)
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{
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return this->family;
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}
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/**
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* implements host_t.get_port
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*/
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static u_int16_t get_port(private_host_t *this)
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{
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switch (this->family)
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{
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case AF_INET:
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{
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return ntohs(this->address4.sin_port);
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}
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default:
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{
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return 0;
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}
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}
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}
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/**
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* Implements host_t.clone.
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*/
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static private_host_t *clone(private_host_t *this)
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{
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private_host_t *new = allocator_alloc_thing(private_host_t);
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memcpy(new, this, sizeof(private_host_t));
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if (this->string)
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{
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new->string = allocator_alloc(strlen(this->string)+1);
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strcpy(new->string, this->string);
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}
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return new;
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}
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/**
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* Impelements host_t.ip_equals
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*/
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static bool ip_equals(private_host_t *this, private_host_t *other)
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{
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switch (this->family)
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{
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/* IPv4 */
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case AF_INET:
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{
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if ((this->address4.sin_family == other->address4.sin_family) &&
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(this->address4.sin_addr.s_addr == other->address4.sin_addr.s_addr))
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{
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return TRUE;
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}
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}
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}
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return FALSE;
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}
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/**
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* Impelements host_t.equals
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*/
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static bool equals(private_host_t *this, private_host_t *other)
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{
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switch (this->family)
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{
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/* IPv4 */
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case AF_INET:
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{
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if ((this->address4.sin_family == other->address4.sin_family) &&
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(this->address4.sin_addr.s_addr == other->address4.sin_addr.s_addr) &&
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(this->address4.sin_port == other->address4.sin_port))
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{
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return TRUE;
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}
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}
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}
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return FALSE;
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}
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/**
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* Implements host_t.destroy
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*/
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static void destroy(private_host_t *this)
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{
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allocator_free(this->string);
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allocator_free(this);
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}
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/**
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* Creates an empty host_t object
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*/
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static private_host_t *host_create_empty()
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{
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private_host_t *this = allocator_alloc_thing(private_host_t);
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this->public.get_sockaddr = (sockaddr_t* (*) (host_t*))get_sockaddr;
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this->public.get_sockaddr_len = (socklen_t*(*) (host_t*))get_sockaddr_len;
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this->public.clone = (host_t* (*) (host_t*))clone;
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this->public.get_family = (int (*) (host_t*))get_family;
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this->public.get_xfrm_addr = (xfrm_address_t (*) (host_t *))get_xfrm_addr;
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this->public.get_address = (char* (*) (host_t *))get_address;
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this->public.get_address_as_chunk = (chunk_t (*) (host_t *)) get_address_as_chunk;
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this->public.get_port = (u_int16_t (*) (host_t *))get_port;
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this->public.ip_equals = (bool (*) (host_t *,host_t *)) ip_equals;
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this->public.equals = (bool (*) (host_t *,host_t *)) equals;
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this->public.is_default_route = (bool (*) (host_t *)) is_default_route;
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this->public.destroy = (void (*) (host_t*))destroy;
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this->string = NULL;
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return this;
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}
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/*
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* Described in header.
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*/
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host_t *host_create(int family, char *address, u_int16_t port)
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{
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private_host_t *this = host_create_empty();
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this->family = family;
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switch (family)
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{
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/* IPv4 */
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case AF_INET:
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{
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this->address4.sin_family = AF_INET;
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this->address4.sin_addr.s_addr = inet_addr(address);
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this->address4.sin_port = htons(port);
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this->socklen = sizeof(struct sockaddr_in);
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return &(this->public);
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}
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default:
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{
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allocator_free(this);
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return NULL;
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}
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}
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}
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/*
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* Described in header.
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*/
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host_t *host_create_from_chunk(int family, chunk_t address, u_int16_t port)
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{
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private_host_t *this = host_create_empty();
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this->family = family;
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switch (family)
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{
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/* IPv4 */
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case AF_INET:
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{
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if (address.len != 4)
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{
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break;
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}
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this->address4.sin_family = AF_INET;
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memcpy(&(this->address4.sin_addr.s_addr),address.ptr,4);
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this->address4.sin_port = htons(port);
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this->socklen = sizeof(struct sockaddr_in);
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return &(this->public);
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}
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}
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allocator_free(this);
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return NULL;
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}
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/*
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* Described in header.
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*/
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host_t *host_create_from_sockaddr(sockaddr_t *sockaddr)
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{
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chunk_t address;
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switch (sockaddr->sa_family)
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{
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/* IPv4 */
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case AF_INET:
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{
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struct sockaddr_in *sin = (struct sockaddr_in *)sockaddr;
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address.ptr = (void*)&(sin->sin_addr.s_addr);
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address.len = 4;
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return host_create_from_chunk(AF_INET, address, ntohs(sin->sin_port));
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}
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default:
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return NULL;
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}
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}
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