61 lines
2 KiB
C
61 lines
2 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <termios.h>
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#define DATA_BUFLEN 128
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struct server_t {
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int socket; /* server socket */
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struct sockaddr_in address; /* server address information */
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unsigned int port; /* server port in host byte order, practical reference */
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};
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struct client_t {
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int socket; /* client socket */
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struct sockaddr_in address; /* client address information */
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char ip_string[INET_ADDRSTRLEN]; /* client IP address as a string */
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char data[DATA_BUFLEN]; /* buffer for data received from client */
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};
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struct tty_t {
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int fd; /* tty file descriptor */
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struct termios ttyset; /* tty termios settings */
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char data[DATA_BUFLEN]; /* buffer for data received from tty */
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};
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/* Sets up the server on specific port, binds to a socket and listens for client connections. */
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int server_setup(struct server_t *server, unsigned int port);
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/* Closes the server. */
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int server_close(struct server_t *server);
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/* Accepts incoming client connection. */
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int server_accept(struct server_t *server, struct client_t *accepted_client);
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/* Rejects incoming client connection. */
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int server_reject(struct server_t *server);
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/* Closes client connection. */
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int client_close(struct client_t *client);
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/* Reads incoming data from client to client data buffer. */
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int client_read(struct client_t *client);
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/* Sends data from a buffer to client. */
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int client_write(struct client_t *client, char *databuf, int datalen);
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/* Opens the tty device and configures it. */
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int tty_open(struct tty_t *tty_dev);
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/* Closes the tty device. */
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int tty_close(struct tty_t *tty_dev);
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/* Reconfigures the tty device. */
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int tty_reconfigure(struct tty_t *tty_dev, struct termios newttyset);
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/* Reads incoming data from tty device to tty data buffer. */
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int tty_read(struct tty_t *tty_dev);
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/* Sends data from a buffer to tty device. */
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int tty_write(struct tty_t *tty_dev, char *databuf, int datalen);
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