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// SPDX-License-Identifier: BSD-3-Clause
#include <cstring>
#include <string>
#include <cerrno>
#include <algorithm>
#include <memory>
#include <utility>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <unistd.h>
#include "../voltronic/exceptions.h"
#include "../p18/exceptions.h"
#include "../voltronic/time.h"
#include "../logging.h"
//#include "hexdump/hexdump.h"
#include "server.h"
#include "connection.h"
#include "signal.h"
namespace server {
Server::Server(std::shared_ptr<voltronic::Device> device)
: sock_(0)
, port_(0)
, cacheTimeout_(CACHE_TIMEOUT)
, verbose_(false)
, device_(std::move(device)) {
client_.setDevice(device_);
}
void Server::setVerbose(bool verbose) {
verbose_ = verbose;
device_->setVerbose(verbose);
}
void Server::setCacheTimeout(u64 timeout) {
cacheTimeout_ = timeout;
}
Server::~Server() {
if (sock_ > 0)
close(sock_);
}
void Server::start(std::string& host, int port) {
host_ = host;
port_ = port;
sock_ = socket(AF_INET, SOCK_STREAM, 0);
if (sock_ == -1)
throw ServerError("failed to create socket");
struct linger sl = {0};
sl.l_onoff = 1;
sl.l_linger = 0;
if (setsockopt(sock_, SOL_SOCKET, SO_LINGER, &sl, sizeof(sl)) == -1)
throw ServerError("setsockopt(linger): " + std::string(strerror(errno)));
int flag = 1;
if (setsockopt(sock_, SOL_SOCKET, SO_REUSEADDR, &flag, sizeof(flag)) == -1)
throw ServerError("setsockopt(reuseaddr): " + std::string(strerror(errno)));
struct sockaddr_in serv_addr = {0};
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = inet_addr(host_.c_str());
serv_addr.sin_port = htons(port_);
memset(serv_addr.sin_zero, 0, sizeof(serv_addr.sin_zero));
if (bind(sock_, (struct sockaddr*)&serv_addr, sizeof(serv_addr)))
throw ServerError("bind: " + std::string(strerror(errno)));
if (listen(sock_, 50))
throw ServerError("start: " + std::string(strerror(errno)));
while (!shutdownCaught) {
struct sockaddr_in addr = {0};
socklen_t addr_size = sizeof(addr);
if (verbose_)
mylog << "waiting for client..";
int sock = accept(sock_, (struct sockaddr*)&addr, &addr_size);
if (sock == -1)
continue;
auto conn = new Connection(sock, addr, this);
addConnection(conn);
}
}
void Server::addConnection(Connection *conn) {
if (verbose_)
myerr << "adding " << conn->ipv4();
LockGuard lock(threads_mutex_);
connections_.emplace_back(conn);
}
void Server::removeConnection(Connection *conn) {
if (verbose_)
myerr << "removing " << conn->ipv4();
LockGuard lock(threads_mutex_);
connections_.erase(std::remove(connections_.begin(), connections_.end(), conn), connections_.end());
}
size_t Server::getConnectionsCount() const {
return connections_.size();
}
std::shared_ptr<p18::response_type::BaseResponse> Server::executeCommand(p18::CommandType commandType, std::vector<std::string>& arguments) {
LockGuard lock(client_mutex_);
auto it = cache_.find(commandType);
if (it != cache_.end()) {
auto cr = it->second;
if (voltronic::timestamp() - cr.time <= cacheTimeout_) {
return cr.response;
}
cache_.erase(it);
}
try {
auto response = client_.execute(commandType, arguments);
CachedResponse cr{voltronic::timestamp(), response};
cache_[commandType] = cr;
return response;
}
catch (voltronic::DeviceError& e) {
throw std::runtime_error("device error: " + std::string(e.what()));
}
catch (voltronic::TimeoutError& e) {
throw std::runtime_error("timeout: " + std::string(e.what()));
}
catch (voltronic::InvalidDataError& e) {
throw std::runtime_error("data is invalid: " + std::string(e.what()));
}
catch (p18::InvalidResponseError& e) {
throw std::runtime_error("response is invalid: " + std::string(e.what()));
}
}
}
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