code blob

code4.c

struct sock *reuseport_select_sock(struct sock *sk, unsigned int phash)
{
    /* Get control block of sockets in this SO_REUSEPORT group */
    struct sock_reuseport *reuse = sk->sk_reuseport_cb;

    /* Get count of sockets in the group */
    int num_socks = reuse->num_socks;

    /* Calculate value between 0 and 'num_socks-1' (both inclusive) */
    unsigned int index = reciprocal_scale(phash, num_socks);

    /* Index into the SO_REUSEPORT group using this index, and return that socket */
    return reuse->socks[index];
}