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57 lines
1.4 KiB
57 lines
1.4 KiB
6 years ago
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#include "helpers.h"
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int create_socket(uint16_t port) {
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int sock;
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struct sockaddr_in socket_name;
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// Creates the socket
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sock = socket (PF_INET, SOCK_STREAM, 0); //TODO: check if PF_INET is the right one
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if (sock < 0) {
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perror("Couldn't create the socket.");
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exit(EXIT_FAILURE);
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}
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// Gives the socket a name
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socket_name.sin_family = AF_INET;
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socket_name.sin_port = htons(port);
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socket_name.sin_addr.s_addr = htonl(INADDR_ANY);
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// Binds own address structure to socket
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if (bind(sock, (struct sockaddr *) &socket_name, sizeof(socket_name)) < 0) {
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perror("Couldn't bind the address structure to the socket.");
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exit(EXIT_FAILURE);
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}
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return sock;
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}
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int read_from_client(int file_des, uint16_t max_line) {
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char buffer[max_line];
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int nbytes;
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nbytes = read(file_des, buffer, sizeof(buffer));
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if (nbytes < 0) {
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perror("Couldn't read from client.");
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exit(EXIT_FAILURE);
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} else if (nbytes == 0)
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// End-of-file
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return -1;
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else {
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fprintf(stderr, "Server: got message: `%s'\n", buffer);
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return 0;
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}
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}
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void init_sockaddr(struct sockaddr_in *name, const char *hostname, uint16_t port) {
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struct hostent *hostinfo;
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name->sin_family = AF_INET;
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name->sin_port = htons(port);
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hostinfo = gethostbyname(hostname);
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if (hostinfo == NULL) {
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fprintf(stderr, "Unknown host %s.\n", hostname);
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exit(EXIT_FAILURE);
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}
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name->sin_addr = *(struct in_addr *) hostinfo->h_addr_list[0];
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}
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