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134 lines
2.9 KiB
C++
134 lines
2.9 KiB
C++
/*
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* \brief Generic network address definitions
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* \author Stefan Kalkowski
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* \date 2010-08-20
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*/
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/*
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* Copyright (C) 2010-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _NET__NETADDRESS_H_
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#define _NET__NETADDRESS_H_
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/* Genode */
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#include <base/stdint.h>
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#include <util/string.h>
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#include <base/output.h>
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namespace Net {
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template <unsigned, char, bool> class Network_address;
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template <unsigned LEN, char DELIM, bool HEX>
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static inline Genode::size_t ascii_to(char const *,
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Network_address<LEN, DELIM, HEX> &);
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}
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/**
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* Generic form of a network address.
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*/
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template <unsigned LEN, char DELIM, bool HEX>
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struct Net::Network_address
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{
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Genode::uint8_t addr[LEN];
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/******************
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** Constructors **
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******************/
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Network_address(Genode::uint8_t value = 0) {
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Genode::memset(&addr, value, LEN); }
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Network_address(void const *src) {
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Genode::memcpy(&addr, src, LEN); }
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/*********************
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** Helper methods **
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*********************/
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void copy(void *dst) const { Genode::memcpy(dst, &addr[0], LEN); }
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void print(Genode::Output &output) const
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{
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using namespace Genode;
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for (unsigned i = 0; i < LEN; i++) {
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if (!HEX) { Genode::print(output, (unsigned) addr[i]); }
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else { Genode::print(output, Hex(addr[i], Hex::OMIT_PREFIX, Hex::PAD)); }
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if (i < LEN - 1) output.out_char(DELIM);
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}
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}
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/***************
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** Operators **
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***************/
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bool operator==(const Network_address &other) const {
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/*
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* We compare from lowest address segment to highest
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* one, because in a local context, the higher segments
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* of two addresses normally don't distinguish.
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* (e.g. in an IPv4 local subnet)
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*/
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for (int i = LEN-1; i >= 0; --i) {
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if (addr[i] != other.addr[i])
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return false;
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}
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return true;
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}
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bool operator!=(const Network_address &other) const {
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return !(*this == other); }
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}
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__attribute__((packed));
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template <unsigned LEN, char DELIM, bool HEX>
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Genode::size_t Net::ascii_to(char const *str, Net::Network_address<LEN, DELIM, HEX> &result)
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{
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using namespace Genode;
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Net::Network_address<LEN, DELIM, HEX> result_buf;
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size_t number_id = 0;
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size_t read_len = 0;
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while (1) {
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/* read the current number */
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size_t number_len =
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ascii_to_unsigned(str, result_buf.addr[number_id],
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HEX ? 16 : 10);
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/* fail if there's no number */
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if (!number_len) {
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return 0; }
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/* update read length and number index */
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read_len += number_len;
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number_id++;
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/* if we have all numbers, fill result and return read length */
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if (number_id == LEN) {
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result = result_buf;
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return read_len;
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}
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/* there are numbers left, check for the delimiter */
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str += number_len;
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if (*str != DELIM) {
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return 0; }
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/* seek to next number */
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read_len++;
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str++;
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}
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}
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#endif /* _NET__NETADDRESS_H_ */
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