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/*
* network.cc - Implementation of the Key classes for network configuration
* libhscript, the HorizonScript library for
* Project Horizon
*
* Copyright (c) 2019 Adélie Linux and contributors. All rights reserved.
* This code is licensed under the AGPL 3.0 license, as noted in the
* LICENSE-code file in the root directory of this repository.
*
* SPDX-License-Identifier: AGPL-3.0-only
*/
#include <algorithm>
#include <arpa/inet.h>
#include "network.hh"
#include "util/output.hh"
using namespace Horizon::Keys;
Key *Network::parseFromData(const std::string data, int lineno, int *errors,
int *warnings) {
bool value;
if(!BooleanKey::parse(data, "installfile:" + std::to_string(lineno),
"network", &value)) {
if(errors) *errors += 1;
return nullptr;
}
return new Network(lineno, value);
}
bool Network::execute(ScriptOptions) const {
return false;
}
Key *NetAddress::parseFromData(const std::string data, int lineno, int *errors,
int *warnings) {
long elements = std::count(data.cbegin(), data.cend(), ' ') + 1;
std::string::size_type type_pos, addr_pos, prefix_pos, gw_pos, next_end;
std::string iface, type, addr, prefix, gw;
int real_prefix;
char addr_buf[16];
if(elements < 2) {
if(errors) *errors += 1;
output_error("installfile:" + std::to_string(lineno),
"netaddress: missing address type",
"one of 'dhcp', 'slaac', 'static' required");
return nullptr;
}
type_pos = data.find_first_of(' ');
iface = data.substr(0, type_pos);
/* theory: addr_pos could be npos, but that means 'read to end' anyway */
addr_pos = data.find_first_of(' ', type_pos + 1);
if(addr_pos == std::string::npos) next_end = std::string::npos;
else next_end = addr_pos - type_pos - 1;
type = data.substr(type_pos + 1, next_end);
/* ensure type is lower-cased, in case someone types 'DHCP' or 'SLAAC' */
std::transform(type.begin(), type.end(), type.begin(), ::tolower);
if(!type.compare("dhcp")) {
if(elements > 2) {
if(errors) *errors += 1;
output_error("installfile:" + std::to_string(lineno),
"netaddress: address type 'dhcp' does not "
"accept further elements");
return nullptr;
}
return new NetAddress(lineno, iface, AddressType::DHCP, "", 0, "");
} else if(!type.compare("slaac")) {
if(elements > 2) {
if(errors) *errors += 1;
output_error("installfile:" + std::to_string(lineno),
"netaddress: address type 'slaac' does not "
"accept further elements");
return nullptr;
}
return new NetAddress(lineno, iface, AddressType::SLAAC, "", 0, "");
} else if(type.compare("static")) {
if(errors) *errors += 1;
output_error("installfile:" + std::to_string(lineno),
"netaddress: invalid address type '" + type + "'",
"one of 'dhcp', 'slaac', 'static' required");
return nullptr;
}
/* static address */
if(elements < 4) {
if(errors) *errors += 1;
output_error("installfile:" + std::to_string(lineno),
"netaddress: address type 'static' requires at least "
"an IP address and prefix length");
return nullptr;
}
if(elements > 5) {
if(errors) *errors += 1;
output_error("installfile:" + std::to_string(lineno),
"netaddress: too many elements to address type 'static'");
return nullptr;
}
prefix_pos = data.find_first_of(' ', addr_pos + 1);
addr = data.substr(addr_pos + 1, (prefix_pos - addr_pos - 1));
gw_pos = data.find_first_of(' ', prefix_pos + 1);
if(gw_pos == std::string::npos) next_end = std::string::npos;
else next_end = gw_pos - prefix_pos - 1;
prefix = data.substr(prefix_pos + 1, next_end);
if(gw_pos != std::string::npos) {
gw = data.substr(gw_pos + 1);
}
if(addr.find(':') != std::string::npos) {
/* IPv6 */
if(::inet_pton(AF_INET6, addr.c_str(), &addr_buf) != 1) {
if(errors) *errors += 1;
output_error("installfile:" + std::to_string(lineno),
"netaddress: '" + addr + "' is not a valid IPv6 address",
"hint: a ':' was found, indicating this address is IPv6");
return nullptr;
}
try {
real_prefix = std::stoi(prefix);
} catch(const std::exception &) {
if(errors) *errors += 1;
output_error("installfile:" + std::to_string(lineno),
"netaddress: prefix length is not a number",
"prefix must be a decimal value between 1 and 128");
return nullptr;
}
if(real_prefix < 1 || real_prefix > 128) {
if(errors) *errors += 1;
output_error("installfile:" + std::to_string(lineno),
"netaddress: invalid IPv6 prefix length: " + prefix,
"prefix must be a decimal value between 1 and 128");
return nullptr;
}
if(gw.size() > 0 &&
::inet_pton(AF_INET6, gw.c_str(), &addr_buf) != 1) {
if(errors) *errors += 1;
output_error("installfile:" + std::to_string(lineno),
"netaddress: '" + gw +
"' is not a valid IPv6 gateway",
"an IPv6 address must have an IPv6 gateway");
return nullptr;
}
return new NetAddress(lineno, iface, AddressType::Static, addr,
static_cast<uint8_t>(real_prefix), gw);
} else if(addr.find('.') != std::string::npos) {
/* IPv4 */
if(::inet_pton(AF_INET, addr.c_str(), &addr_buf) != 1) {
if(errors) *errors += 1;
output_error("installfile:" + std::to_string(lineno),
"netaddress: '" + addr + "' is not a valid IPv4 address");
return nullptr;
}
/* There are two kinds of prefixes for IPv4: prefix length, like IPv6,
* and mask, which is the old style used by i.e. Windows. */
if(::inet_pton(AF_INET, prefix.c_str(), &addr_buf) != 1) {
try {
real_prefix = std::stoi(prefix);
} catch(const std::exception &) {
if(errors) *errors += 1;
output_error("installfile:" + std::to_string(lineno),
"netaddress: can't parse prefix length/mask",
"a network mask or prefix length is required");
return nullptr;
}
} else {
uint32_t tmp;
memcpy(&tmp, addr_buf, 4);
tmp = ntohl(tmp);
real_prefix = 1;
while((tmp <<= 1) & 0x80000000) {
real_prefix++;
}
}
if(real_prefix < 1 || real_prefix > 32) {
if(errors) *errors += 1;
output_error("installfile:" + std::to_string(lineno),
"netaddress: invalid IPv4 prefix length: " + prefix,
"prefix must be between 1 and 32");
return nullptr;
}
if(gw.size() > 0 &&
::inet_pton(AF_INET, gw.c_str(), &addr_buf) != 1) {
if(errors) *errors += 1;
output_error("installfile:" + std::to_string(lineno),
"netaddress: '" + gw +
"' is not a valid IPv4 gateway",
"an IPv4 address must have an IPv4 gateway");
return nullptr;
}
return new NetAddress(lineno, iface, AddressType::Static, addr,
static_cast<uint8_t>(real_prefix), gw);
} else {
/* IPvBad */
if(errors) *errors += 1;
output_error("installfile:" + std::to_string(lineno),
"netaddress: invalid address of unknown type",
"an IPv4 or IPv6 address is required");
return nullptr;
}
}
bool NetAddress::validate(ScriptOptions) const {
/* possible to validate an address in the Installation Environment? */
return true;
}
bool NetAddress::execute(ScriptOptions) const {
return false;
}
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