List of constants in sockets.inc

#define SOCKET_TCP 1
#define SOCKET_UDP 2

#define SOCK_NON_BLOCKING (1 << 0)    /* Set the socket a nonblocking */
#define SOCK_LIBC_ERRORS  (1 << 1)    /* Enable libc error reporting */

#define SOCK_ERROR_OK               0 /* No error */
#define SOCK_ERROR_CREATE_SOCKET    1 /* Couldn't create a socket */
#define SOCK_ERROR_SERVER_UNKNOWN   2 /* Server unknown */
#define SOCK_ERROR_WHILE_CONNECTING 3 /* Error while connecting */