masterthesis-ecdaa-network-wrapper/server.c

#include "server.h"

server_t* server_open(conn_handler handler) {
    struct sockaddr_in servaddr;
    server_t *server = malloc(sizeof(server_t));
    if(NULL == handler) {
        printf("server_open: received empty handler, stopping");
        return NULL;
    }
    if (NULL == server) {
        printf("server_open: malloc failed");
        return NULL;
    }
    server->conn = connection_create(CONN_TYPE_SERVER);
    if (NULL == server->conn) {
        free(server);
        return NULL;
    }
    server->handler = handler;
    server->conn->fd = socket(AF_INET, SOCK_STREAM, 0);
    if (-1 == server->conn->fd) {
        printf("server_listen: failed to create endpoint.\n");
        return NULL;
    }
    servaddr.sin_family = AF_INET;
    servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
    servaddr.sin_port = htons(PORT);

    if (0 != bind(server->conn->fd, (const struct sockaddr *) &servaddr, sizeof(servaddr))) {
        printf("server_listen: failed to bind socket\n");
        return NULL;
    }
    return server;
}

int server_accept(server_t *server) {
    struct sockaddr_in client;
    int client_len = 0;
    int connfd = -1;
    if (NULL == server || 0 != listen(server->conn->fd, MAX_CLIENTS)) {
        printf("server_accept: listen failed\n");
        return -1;
    }
    printf("server_accept: listening\n");
    client_len = sizeof(client);
    connfd = accept(server->conn->fd, &client, &client_len);
    if(0 >= connfd) {
        printf("server_accept: connection to client failed, ");
        return -1;
    } else {
        server->handler(connfd);
        if(0 != close(connfd)) {
            printf("server_accept: failed to close client connection properly");
            return -1;
        }
    }
    return 0;
}

int server_close(server_t *server) {
    int err = 0;
    if (NULL == server) {
        return 0;
    }
    if (0 != connection_destroy(server->conn)) {
        printf("server_close: closing socket failed\n");
        err = -1;
    }
    free(server);
    return err;
}