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/***************************************************************************
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net_server.c - description
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-------------------
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Copyright : (C) 2004-2025 by Leaflet
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Email : leaflet@leafok.com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include "net_server.h"
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#include "common.h"
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#include "log.h"
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#include "io.h"
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#include "fork.h"
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#include "tcplib.h"
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#include <sys/socket.h>
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#include <arpa/inet.h>
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int net_server(const char *hostaddr, in_port_t port)
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{
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unsigned int namelen;
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int result;
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int flags;
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struct sockaddr_in sin;
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fd_set testfds;
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struct timeval timeout;
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socket_server = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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if (socket_server < 0)
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{
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log_error("Create socket failed\n");
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exit(1);
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}
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sin.sin_family = AF_INET;
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sin.sin_addr.s_addr =
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(strnlen(hostaddr, sizeof(hostaddr)) > 0 ? inet_addr(hostaddr) : INADDR_ANY);
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sin.sin_port = htons(port);
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if (bind(socket_server, (struct sockaddr *)&sin, sizeof(sin)) < 0)
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{
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log_error("Bind address %s:%u failed\n",
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inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));
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exit(2);
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}
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if (listen(socket_server, 10) < 0)
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{
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log_error("Socket listen failed\n");
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exit(3);
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}
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strncpy(hostaddr_server, inet_ntoa(sin.sin_addr), sizeof(hostaddr_server) - 1);
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hostaddr_server[sizeof(hostaddr_server) - 1] = '\0';
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port_server = ntohs(sin.sin_port);
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log_std("Listening at %s:%d\n", hostaddr_server, port_server);
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namelen = sizeof(sin);
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while (!SYS_exit)
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{
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FD_ZERO(&testfds);
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FD_SET(socket_server, &testfds);
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timeout.tv_sec = 1;
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timeout.tv_usec = 0;
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result = SignalSafeSelect(FD_SETSIZE, &testfds, NULL, NULL, &timeout);
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if (result < 0)
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{
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log_error("Accept connection error\n");
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continue;
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}
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if (result == 0)
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{
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continue;
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}
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if (FD_ISSET(socket_server, &testfds))
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{
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flags = fcntl(socket_server, F_GETFL, 0);
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fcntl(socket_server, F_SETFL, flags | O_NONBLOCK);
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while ((socket_client =
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accept(socket_server, (struct sockaddr *)&sin, &namelen)) < 0)
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{
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if (errno != EWOULDBLOCK && errno != ECONNABORTED && errno != EINTR)
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{
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log_error("Accept connection error\n");
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break;
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}
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}
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fcntl(socket_server, F_SETFL, flags);
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}
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if (socket_client < 0)
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{
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log_error("Accept connection error\n");
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continue;
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}
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strncpy(hostaddr_client, inet_ntoa(sin.sin_addr), sizeof(hostaddr_client) - 1);
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hostaddr_client[sizeof(hostaddr_client) - 1] = '\0';
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port_client = ntohs(sin.sin_port);
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log_std("Accept connection from %s:%d\n", hostaddr_client,
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port_client);
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if (fork_server() < 0)
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{
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log_error("Fork error\n");
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}
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if (close(socket_client) == -1)
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{
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log_error("Close client socket failed\n");
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}
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}
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if (close(socket_server) == -1)
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{
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log_error("Close server socket failed\n");
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}
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return 0;
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}
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