socket_spec
static int socket_spec_pairs(struct socket_spec *s)
static void socket_spec_close(struct socket_spec *s)
struct maps *maps, struct socket_spec *s_in,
struct socket_spec *s_out)
struct socket_spec *s, sockets[] = {
struct socket_spec *out = &sockets[j];
struct socket_spec *in = &sockets[i];