masterthesis-ecdaa-network-wrapper/client.c

#include "client.h"

client_t* client_open(conn_handler handler) {
    struct sockaddr_in servaddr;
    client_t *client = malloc(sizeof(client_t));
    if(NULL == handler) {
        printf("client_open: received empty handler, stopping");
        return NULL;
    }
    if (NULL == client) {
        printf("client_open: malloc failed");
        return NULL;
    }
    client->conn = connection_create(CONN_TYPE_CLIENT);
    if (NULL == client->conn) {
        free(client);
        return NULL;
    }
    client->handler = handler;
    client->conn->fd = socket(AF_INET, SOCK_STREAM, 0);
    if (-1 == client->conn->fd) {
        printf("client_listen: failed to create endpoint.\n");
        return NULL;
    }
    return client;
}

int client_connect(client_t *client, char *ip_str, int16_t port) {
    struct sockaddr_in servaddr;
    unsigned int servaddr_len = 0;

    if(client == NULL) {
        return -1;
    }

    servaddr.sin_family = AF_INET;
    servaddr.sin_addr.s_addr = inet_addr(ip_str);
    servaddr.sin_port = htons(port);

    servaddr_len = sizeof(servaddr);
    if(0 >= connect(client->conn->fd, (const struct sockaddr *) &servaddr, servaddr_len)) {
        printf("client_accept: connection to server failed\n");
        return -1;
    } else {
        client->handler(client->conn->fd);
    }
    return 0;
}

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