blob: 9ed18e8e228502fee68081c0cee00dce8824af6d [file] [log] [blame]
#include "server-conf.hpp"
#include "utils.hpp"
#include "xyz/openbmc_project/Common/error.hpp"
#include <fstream>
#include <phosphor-logging/elog.hpp>
#if __has_include("../../usr/include/phosphor-logging/elog-errors.hpp")
#include "../../usr/include/phosphor-logging/elog-errors.hpp"
#else
#include <phosphor-logging/elog-errors.hpp>
#endif
#include <arpa/inet.h>
#include <netdb.h>
#include <optional>
#include <string>
namespace phosphor
{
namespace rsyslog_config
{
namespace utils = phosphor::rsyslog_utils;
using namespace phosphor::logging;
using namespace sdbusplus::xyz::openbmc_project::Common::Error;
namespace internal
{
bool isIPv6Address(const std::string& addr)
{
struct in6_addr result;
return inet_pton(AF_INET6, addr.c_str(), &result) == 1;
}
std::optional<std::pair<std::string, uint32_t>> parseConfig(std::istream& ss)
{
std::string line;
std::getline(ss, line);
//"*.* @@<address>:<port>" or
//"*.* @@[<ipv6-address>:<port>"
constexpr auto start = 6; // Skip "*.* @@"
std::string serverAddress;
std::string serverPort;
// Ignore if line is commented
if (!line.empty() && '#' != line.at(0))
{
// Check if there is "[]", and make IPv6 address from it
auto posColonLeft = line.find('[');
auto posColonRight = line.find(']');
if (posColonLeft != std::string::npos ||
posColonRight != std::string::npos)
{
// It contains [ or ], so it should be an IPv6 address
if (posColonLeft == std::string::npos ||
posColonRight == std::string::npos)
{
// There either '[' or ']', invalid config
return {};
}
if (line.size() < posColonRight + 2 ||
line.at(posColonRight + 1) != ':')
{
// There is no ':', or no more content after ':', invalid config
return {};
}
serverAddress =
line.substr(posColonLeft + 1, posColonRight - posColonLeft - 1);
serverPort = line.substr(posColonRight + 2);
}
else
{
auto pos = line.find(':');
if (pos == std::string::npos)
{
// There is no ':', invalid config
return {};
}
serverAddress = line.substr(start, pos - start);
serverPort = line.substr(pos + 1);
}
}
if (serverAddress.empty() || serverPort.empty())
{
return {};
}
try
{
uint32_t port = std::stoul(serverPort);
return std::make_pair(std::move(serverAddress), port);
}
catch (const std::exception& ex)
{
log<level::ERR>("Invalid config", entry("ERR=%s", ex.what()));
return {};
}
}
} // namespace internal
std::string Server::address(std::string value)
{
using Argument = xyz::openbmc_project::Common::InvalidArgument;
std::string result{};
try
{
auto serverAddress = address();
if (serverAddress == value)
{
return serverAddress;
}
if (!value.empty() && !addressValid(value))
{
elog<InvalidArgument>(Argument::ARGUMENT_NAME("Address"),
Argument::ARGUMENT_VALUE(value.c_str()));
}
writeConfig(value, port(), configFilePath.c_str());
result = std::move(NetworkClient::address(value));
}
catch (const InvalidArgument& e)
{
throw;
}
catch (const InternalFailure& e)
{
throw;
}
catch (const std::exception& e)
{
log<level::ERR>(e.what());
elog<InternalFailure>();
}
return result;
}
uint16_t Server::port(uint16_t value)
{
uint16_t result{};
try
{
auto serverPort = port();
if (serverPort == value)
{
return serverPort;
}
writeConfig(address(), value, configFilePath.c_str());
result = NetworkClient::port(value);
}
catch (const InternalFailure& e)
{
throw;
}
catch (const std::exception& e)
{
log<level::ERR>(e.what());
elog<InternalFailure>();
}
return result;
}
void Server::writeConfig(const std::string& serverAddress, uint16_t serverPort,
const char* filePath)
{
std::fstream stream(filePath, std::fstream::out);
if (serverPort && !serverAddress.empty())
{
// write '*.* @@<remote-host>:<port>'
if (internal::isIPv6Address(serverAddress))
{
stream << "*.* @@[" << serverAddress << "]:" << serverPort;
}
else
{
stream << "*.* @@" << serverAddress << ":" << serverPort;
}
}
else // this is a disable request
{
// write '*.* ~' - this causes rsyslog to discard all messages
stream << "*.* ~";
}
restart();
}
bool Server::addressValid(const std::string& address)
{
addrinfo hints{};
addrinfo* res = nullptr;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags |= AI_CANONNAME;
auto result = getaddrinfo(address.c_str(), nullptr, &hints, &res);
if (result)
{
log<level::ERR>("bad address", entry("ADDRESS=%s", address.c_str()),
entry("ERRNO=%d", result));
return false;
}
freeaddrinfo(res);
return true;
}
void Server::restore(const char* filePath)
{
std::fstream stream(filePath, std::fstream::in);
auto ret = internal::parseConfig(stream);
if (ret)
{
NetworkClient::address(ret->first);
NetworkClient::port(ret->second);
}
}
void Server::restart()
{
utils::restart();
}
} // namespace rsyslog_config
} // namespace phosphor