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net: move Ipv4_address_prefix to nic_router
As this tool is not used by any other component make it local to the NIC router to keep the net-lib interface small. Ref #2534
This commit is contained in:
Martin Stein
Christian Helmuth
parent
50aba6f21b
commit
0ca248551a
@ -30,8 +30,6 @@ namespace Net
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class Ipv4_address;
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class Ipv4_address_prefix;
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class Ipv4_packet;
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}
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@ -222,61 +220,9 @@ class Net::Ipv4_packet
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} __attribute__((packed));
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struct Net::Ipv4_address_prefix
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{
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Ipv4_address address;
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Genode::uint8_t prefix = 32;
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bool valid() const { return address.valid() || !prefix; }
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void print(Genode::Output &output) const;
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bool prefix_matches(Ipv4_address const &ip) const;
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Ipv4_address subnet_mask() const
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{
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Ipv4_address result;
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if (prefix >= 8) {
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result.addr[0] = 0xff;
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if (prefix >= 16) {
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result.addr[1] = 0xff;
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if (prefix >= 24) {
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result.addr[2] = 0xff;
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result.addr[3] = 0xff << (32 - prefix);
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} else {
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result.addr[2] = 0xff << (24 - prefix);
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}
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} else {
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result.addr[1] = 0xff << (16 - prefix);
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}
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} else {
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result.addr[0] = 0xff << (8 - prefix);
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}
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return result;
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}
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Ipv4_address broadcast_address() const
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{
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Ipv4_address result = address;
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Ipv4_address const mask = subnet_mask();
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for (unsigned i = 0; i < 4; i++) {
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result.addr[i] |= ~mask.addr[i];
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}
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return result;
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}
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};
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namespace Genode {
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inline size_t ascii_to(char const *s, Net::Ipv4_address &result);
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inline size_t ascii_to(char const *s, Net::Ipv4_address_prefix &result);
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}
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@ -310,30 +256,4 @@ Genode::size_t Genode::ascii_to(char const *s, Net::Ipv4_address &result)
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}
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}
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Genode::size_t Genode::ascii_to(char const *s, Net::Ipv4_address_prefix &result)
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{
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/* read the leading IPv4 address, fail if there's no address */
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Net::Ipv4_address_prefix buf;
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size_t read_len = ascii_to(s, buf.address);
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if (!read_len) {
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return 0; }
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/* check for the following slash */
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s += read_len;
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if (*s != '/') {
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return 0; }
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read_len++;
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s++;
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/* read the prefix, fail if there's no prefix */
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size_t prefix_len = ascii_to_unsigned(s, buf.prefix, 10);
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if (!prefix_len) {
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return 0; }
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/* fill result and return read length */
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result = buf;
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return read_len + prefix_len;
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}
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#endif /* _IPV4_H_ */
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@ -149,24 +149,3 @@ Genode::uint16_t Ipv4_packet::calculate_checksum(Ipv4_packet const &packet)
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const Ipv4_address Ipv4_packet::CURRENT((Genode::uint8_t)0x00);
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const Ipv4_address Ipv4_packet::BROADCAST((Genode::uint8_t)0xFF);
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void Ipv4_address_prefix::print(Genode::Output &output) const
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{
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Genode::print(output, address, "/", prefix);
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}
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bool Ipv4_address_prefix::prefix_matches(Ipv4_address const &ip) const
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{
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uint8_t prefix_left = prefix;
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uint8_t byte = 0;
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for (; prefix_left >= 8; prefix_left -= 8, byte++) {
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if (ip.addr[byte] != address.addr[byte]) {
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return false; }
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}
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if (prefix_left == 0) {
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return true; }
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uint8_t const mask = ~(0xff >> prefix_left);
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return !((ip.addr[byte] ^ address.addr[byte]) & mask);
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}
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@ -14,14 +14,14 @@
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#ifndef _DIRECT_RULE_H_
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#define _DIRECT_RULE_H_
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/* local includes */
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#include <ipv4_address_prefix.h>
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#include <rule.h>
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/* Genode includes */
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#include <net/ipv4.h>
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#include <util/list.h>
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#include <util/xml_node.h>
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/* local includes */
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#include <rule.h>
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namespace Genode { class Xml_node; }
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namespace Net {
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79
repos/os/src/server/nic_router/ipv4_address_prefix.cc
Normal file
79
repos/os/src/server/nic_router/ipv4_address_prefix.cc
Normal file
@ -0,0 +1,79 @@
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/*
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* \brief Ipv4 address combined with a subnet prefix length
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* \author Martin Stein
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* \date 2017-10-12
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*/
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/*
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* Copyright (C) 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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/* local includes */
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#include <ipv4_address_prefix.h>
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using namespace Genode;
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using namespace Net;
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Ipv4_address Ipv4_address_prefix::subnet_mask() const
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{
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Ipv4_address result;
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if (prefix >= 8) {
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result.addr[0] = 0xff;
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if (prefix >= 16) {
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result.addr[1] = 0xff;
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if (prefix >= 24) {
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result.addr[2] = 0xff;
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result.addr[3] = 0xff << (32 - prefix);
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} else {
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result.addr[2] = 0xff << (24 - prefix);
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}
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} else {
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result.addr[1] = 0xff << (16 - prefix);
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}
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} else {
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result.addr[0] = 0xff << (8 - prefix);
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}
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return result;
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}
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void Ipv4_address_prefix::print(Genode::Output &output) const
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{
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Genode::print(output, address, "/", prefix);
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}
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bool Ipv4_address_prefix::prefix_matches(Ipv4_address const &ip) const
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{
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uint8_t prefix_left = prefix;
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uint8_t byte = 0;
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for (; prefix_left >= 8; prefix_left -= 8, byte++) {
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if (ip.addr[byte] != address.addr[byte]) {
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return false; }
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}
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if (prefix_left == 0) {
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return true; }
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uint8_t const mask = ~(0xff >> prefix_left);
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return !((ip.addr[byte] ^ address.addr[byte]) & mask);
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}
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Ipv4_address Ipv4_address_prefix::broadcast_address() const
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{
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Ipv4_address result = address;
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Ipv4_address const mask = subnet_mask();
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for (unsigned i = 0; i < 4; i++) {
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result.addr[i] |= ~mask.addr[i];
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}
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return result;
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}
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71
repos/os/src/server/nic_router/ipv4_address_prefix.h
Normal file
71
repos/os/src/server/nic_router/ipv4_address_prefix.h
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@ -0,0 +1,71 @@
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/*
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* \brief Ipv4 address combined with a subnet prefix length
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* \author Martin Stein
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* \date 2017-10-12
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*/
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/*
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* Copyright (C) 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 _IPV4_ADDRESS_PREFIX_H_
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#define _IPV4_ADDRESS_PREFIX_H_
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/* Genode includes */
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#include <net/ipv4.h>
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namespace Net { class Ipv4_address_prefix; }
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struct Net::Ipv4_address_prefix
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{
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Ipv4_address address;
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Genode::uint8_t prefix { 32 };
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bool valid() const { return address.valid() || prefix == 0; }
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void print(Genode::Output &output) const;
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bool prefix_matches(Ipv4_address const &ip) const;
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Ipv4_address subnet_mask() const;
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Ipv4_address broadcast_address() const;
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};
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namespace Genode {
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inline size_t ascii_to(char const *s, Net::Ipv4_address_prefix &result);
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}
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Genode::size_t Genode::ascii_to(char const *s, Net::Ipv4_address_prefix &result)
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{
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/* read the leading IPv4 address, fail if there's no address */
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Net::Ipv4_address_prefix buf;
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size_t read_len = ascii_to(s, buf.address);
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if (!read_len) {
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return 0; }
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/* check for the following slash */
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s += read_len;
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if (*s != '/') {
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return 0; }
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read_len++;
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s++;
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/* read the prefix, fail if there's no prefix */
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size_t prefix_len = ascii_to_unsigned(s, buf.prefix, 10);
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if (!prefix_len) {
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return 0; }
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/* fill result and return read length */
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result = buf;
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return read_len + prefix_len;
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}
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#endif /* _IPV4_ADDRESS_PREFIX_H_ */
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@ -2,7 +2,7 @@ TARGET = nic_router
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LIBS += base net
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SRC_CC += arp_waiter.cc ip_rule.cc
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SRC_CC += arp_waiter.cc ip_rule.cc ipv4_address_prefix.cc
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SRC_CC += component.cc port_allocator.cc forward_rule.cc
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SRC_CC += nat_rule.cc mac_allocator.cc main.cc
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SRC_CC += uplink.cc interface.cc arp_cache.cc configuration.cc
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@ -20,6 +20,7 @@
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/* local includes */
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#include <interface.h>
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#include <ipv4_address_prefix.h>
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namespace Net { class Uplink; }
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