112 lines
2.4 KiB
C
112 lines
2.4 KiB
C
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#include "sockets.h"
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bool socket_init() {
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#ifdef _WIN32 /* initialize the socket API */
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WSADATA info;
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if (WSAStartup(MAKEWORD(1, 1), &info) != 0) {
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fprintf(stderr, "Cannot initialize Winsock.\n");
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return false;
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}
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#endif
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return true;
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}
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bool socket_set_non_blocking(int fd) {
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if (fd < 0)
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return false;
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#ifdef _WIN32
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unsigned long mode = 1;
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return (ioctlsocket(fd, FIONBIO, &mode) == 0) ? true : false;
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#else
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int flags = fcntl(fd, F_GETFL, 0) | O_NONBLOCK;
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return (fcntl(fd, F_SETFL, flags) == 0) ? true : false;
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#endif
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}
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int socket_accept(int server_fd) {
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int cfd;
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struct sockaddr_in client;
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struct hostent *client_info;
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#ifndef _WIN32
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socklen_t asize;
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#else
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int asize;
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#endif
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asize = sizeof(struct sockaddr_in);
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cfd = accept(server_fd, (struct sockaddr *)&client, &asize);
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if (cfd == -1) {
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#ifdef _WIN32
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int e = WSAGetLastError();
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if (e == WSAEWOULDBLOCK)
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return 0;
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fprintf(stderr, "Accept error: %d.\n", e);
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#else
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if (errno == EWOULDBLOCK)
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return 0;
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fprintf(stderr, "Accept error: %d.\n", errno);
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#endif
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return -1;
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}
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client_info = gethostbyname((char *)inet_ntoa(client.sin_addr));
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printf("Accepted connection from: %s.\n", client_info->h_name);
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return cfd;
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}
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bool socket_close(int fd) {
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#ifdef _WIN32
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return (closesocket(fd) == 0) ? true : false;
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#else
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return (close(fd) == 0) ? true : false;
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#endif
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}
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bool socket_cleanup() {
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#ifdef _WIN32
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return (WSACleanup() == 0) ? true : false;
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#else
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return true;
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#endif
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}
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/*
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Creates a socket and bind it to port.
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*/
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int create_socket_server(int port) {
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int sfd, rc;
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struct sockaddr_in address;
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if (!socket_init())
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{
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fprintf (stderr, "socket_init failed");
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return -1;
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}
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sfd = socket(AF_INET, SOCK_STREAM, 0);
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if (sfd == -1) {
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fprintf(stderr, "Cannot create socket.\n");
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return -1;
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}
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int one = 1;
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setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
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memset(&address, 0, sizeof(struct sockaddr_in));
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address.sin_family = AF_INET;
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address.sin_port = htons((unsigned short)port);
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address.sin_addr.s_addr = INADDR_ANY;
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rc = bind(sfd, (struct sockaddr *)&address, sizeof(struct sockaddr));
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if (rc == -1) {
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fprintf(stderr, "Cannot bind port %d.\n", port);
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socket_close(sfd);
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return -1;
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}
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if (listen(sfd, 1) == -1) {
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fprintf(stderr, "Cannot listen for connections.\n");
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socket_close(sfd);
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return -1;
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}
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printf ("socket initialized at port %d.\n", port);
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return sfd;
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}
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