static void sock_init(struct sock *sk, int family, int type,
int protocol, const struct sock_family_ops *f_ops,
const struct sock_proto_ops *p_ops,
const struct net_pack_out_ops *o_ops) {
assert(sk != NULL);
assert(f_ops != NULL);
assert(p_ops != NULL);
dlist_head_init(&sk->lnk);
sock_opt_init(&sk->opt, family, type, protocol);
skb_queue_init(&sk->rx_queue);
skb_queue_init(&sk->tx_queue);
sk->rx_data_len = 0;
sock_set_state(sk, SS_UNKNOWN);
sk->shutdown_flag = 0;
sk->p_sk = sk->p_sk; /* setup in sock_alloc() */
sk->f_ops = f_ops;
sk->p_ops = p_ops;
sk->o_ops = o_ops;
sk->src_addr = sk->dst_addr = NULL;
sk->addr_len = 0;
sk->err = 0;
idesc_init(&sk->idesc, &task_idx_ops_socket, FS_MAY_READ | FS_MAY_WRITE);
sock_xattr_init(sk);
security_sock_create(sk);
}
static struct idesc *tun_dev_open(struct node *node, struct file_desc *file_desc, int flags) {
struct net_device *netdev;
struct tun *tun;
netdev = tun_netdev_by_node(node);
if (!netdev) {
return err_ptr(ENOENT);
}
tun = netdev_priv(netdev, struct tun);
tun_user_lock(tun);
waitq_init(&tun->wq);
tun_krnl_lock(tun);
{
skb_queue_init(&tun->rx_q);
}
tun_krnl_unlock(tun);
file_desc->file_info = netdev;
return &file_desc->idesc;
}
