if (pr->ready) sshfwd_write(pr->c, data, len);
if (pr->ready) { if (sshfwd_write(pr->c, data, len) > 0) { pr->throttled = 1; sk_set_frozen(pr->s, 1); } }
static int pfd_receive(Plug plug, int urgent, char *data, int len){    struct PFwdPrivate *pr = (struct PFwdPrivate *) plug;    if (pr->ready)	sshfwd_write(pr->c, data, len);    return 1;}