/* Socket module header file */

/* Includes needed for the sockaddr_* symbols below */
#ifndef MS_WINDOWS
#ifdef __VMS
# include <socket.h>
# else
# include <sys/socket.h>
# endif
# include <netinet/in.h>
# if !defined(__CYGWIN__)
# include <netinet/tcp.h>
# endif

#else /* MS_WINDOWS */
# include <winsock2.h>
/* Windows 'supports' CMSG_LEN, but does not follow the POSIX standard
 * interface at all, so there is no point including the code that
 * attempts to use it.
 */
# ifdef PySocket_BUILDING_SOCKET
# undef CMSG_LEN
# endif
# include <ws2tcpip.h>
/* VC6 is shipped with old platform headers, and does not have MSTcpIP.h
 * Separate SDKs have all the functions we want, but older ones don't have
 * any version information.
 * I use SIO_GET_MULTICAST_FILTER to detect a decent SDK.
 */
# ifdef SIO_GET_MULTICAST_FILTER
# include <mstcpip.h> /* for SIO_RCVALL */
# define HAVE_ADDRINFO
# define HAVE_SOCKADDR_STORAGE
# define HAVE_GETADDRINFO
# define HAVE_GETNAMEINFO
# define ENABLE_IPV6
# else
typedef int socklen_t;
# endif /* IPPROTO_IPV6 */
#endif /* MS_WINDOWS */

#ifdef HAVE_SYS_UN_H
# include <sys/un.h>
#else
# undef AF_UNIX
#endif

#ifdef HAVE_LINUX_NETLINK_H
# ifdef HAVE_ASM_TYPES_H
# include <asm/types.h>
# endif
# include <linux/netlink.h>
#else
# undef AF_NETLINK
#endif

#ifdef HAVE_LINUX_QRTR_H
# ifdef HAVE_ASM_TYPES_H
# include <asm/types.h>
# endif
# include <linux/qrtr.h>
#else
# undef AF_QIPCRTR
#endif

#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
#include <bluetooth/bluetooth.h>
#include <bluetooth/rfcomm.h>
#include <bluetooth/l2cap.h>
#include <bluetooth/sco.h>
#include <bluetooth/hci.h>
#endif

#ifdef HAVE_BLUETOOTH_H
#include <bluetooth.h>
#endif

#ifdef HAVE_NET_IF_H
# include <net/if.h>
#endif

#ifdef HAVE_NETPACKET_PACKET_H
# include <sys/ioctl.h>
# include <netpacket/packet.h>
#endif

#ifdef HAVE_LINUX_TIPC_H
# include <linux/tipc.h>
#endif

#ifdef HAVE_LINUX_CAN_H
# include <linux/can.h>
#else
# undef AF_CAN
# undef PF_CAN
#endif

#ifdef HAVE_LINUX_CAN_RAW_H
#include <linux/can/raw.h>
#endif

#ifdef HAVE_LINUX_CAN_BCM_H
#include <linux/can/bcm.h>
#endif

#ifdef HAVE_SYS_SYS_DOMAIN_H
#include <sys/sys_domain.h>
#endif
#ifdef HAVE_SYS_KERN_CONTROL_H
#include <sys/kern_control.h>
#endif

#ifdef HAVE_LINUX_VM_SOCKETS_H
# include <linux/vm_sockets.h>
#else
# undef AF_VSOCK
#endif

#ifdef HAVE_SOCKADDR_ALG

# include <linux/if_alg.h>
# ifndef AF_ALG
# define AF_ALG 38
# endif
# ifndef SOL_ALG
# define SOL_ALG 279
# endif

/* Linux 3.19 */
# ifndef ALG_SET_AEAD_ASSOCLEN
# define ALG_SET_AEAD_ASSOCLEN 4
# endif
# ifndef ALG_SET_AEAD_AUTHSIZE
# define ALG_SET_AEAD_AUTHSIZE 5
# endif
/* Linux 4.8 */
# ifndef ALG_SET_PUBKEY
# define ALG_SET_PUBKEY 6
# endif

# ifndef ALG_OP_SIGN
# define ALG_OP_SIGN 2
# endif
# ifndef ALG_OP_VERIFY
# define ALG_OP_VERIFY 3
# endif

#endif /* HAVE_SOCKADDR_ALG */


#ifndef Py__SOCKET_H
#define Py__SOCKET_H
#ifdef __cplusplus
extern "C" {
#endif

/* Python module and C API name */
#define PySocket_MODULE_NAME "_socket"
#define PySocket_CAPI_NAME "CAPI"
#define PySocket_CAPSULE_NAME PySocket_MODULE_NAME "." PySocket_CAPI_NAME

/* Abstract the socket file descriptor type */
#ifdef MS_WINDOWS
typedef SOCKET SOCKET_T;
# ifdef MS_WIN64
# define SIZEOF_SOCKET_T 8
# else
# define SIZEOF_SOCKET_T 4
# endif
#else
typedef int SOCKET_T;
# define SIZEOF_SOCKET_T SIZEOF_INT
#endif

#if SIZEOF_SOCKET_T <= SIZEOF_LONG
#define PyLong_FromSocket_t(fd) PyLong_FromLong((SOCKET_T)(fd))
#define PyLong_AsSocket_t(fd) (SOCKET_T)PyLong_AsLong(fd)
#else
#define PyLong_FromSocket_t(fd) PyLong_FromLongLong((SOCKET_T)(fd))
#define PyLong_AsSocket_t(fd) (SOCKET_T)PyLong_AsLongLong(fd)
#endif

/* Socket address */
typedef union sock_addr {
 struct sockaddr_in in;
 struct sockaddr sa;
#ifdef AF_UNIX
 struct sockaddr_un un;
#endif
#ifdef AF_NETLINK
 struct sockaddr_nl nl;
#endif
#ifdef ENABLE_IPV6
 struct sockaddr_in6 in6;
 struct sockaddr_storage storage;
#endif
#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
 struct sockaddr_l2 bt_l2;
 struct sockaddr_rc bt_rc;
 struct sockaddr_sco bt_sco;
 struct sockaddr_hci bt_hci;
#endif
#ifdef HAVE_NETPACKET_PACKET_H
 struct sockaddr_ll ll;
#endif
#ifdef HAVE_LINUX_CAN_H
 struct sockaddr_can can;
#endif
#ifdef HAVE_SYS_KERN_CONTROL_H
 struct sockaddr_ctl ctl;
#endif
#ifdef HAVE_SOCKADDR_ALG
 struct sockaddr_alg alg;
#endif
#ifdef AF_QIPCRTR
 struct sockaddr_qrtr sq;
#endif
#ifdef AF_VSOCK
 struct sockaddr_vm vm;
#endif
} sock_addr_t;

/* The object holding a socket. It holds some extra information,
 like the address family, which is used to decode socket address
 arguments properly. */

typedef struct {
 PyObject_HEAD
 SOCKET_T sock_fd; /* Socket file descriptor */
 int sock_family; /* Address family, e.g., AF_INET */
 int sock_type; /* Socket type, e.g., SOCK_STREAM */
 int sock_proto; /* Protocol type, usually 0 */
 PyObject *(*errorhandler)(void); /* Error handler; checks
 errno, returns NULL and
 sets a Python exception */
 _PyTime_t sock_timeout; /* Operation timeout in seconds;
 0.0 means non-blocking */
} PySocketSockObject;

/* --- C API ----------------------------------------------------*/

/* Short explanation of what this C API export mechanism does
 and how it works:

 The _ssl module needs access to the type object defined in
 the _socket module. Since cross-DLL linking introduces a lot of
 problems on many platforms, the "trick" is to wrap the
 C API of a module in a struct which then gets exported to
 other modules via a PyCapsule.

 The code in socketmodule.c defines this struct (which currently
 only contains the type object reference, but could very
 well also include other C APIs needed by other modules)
 and exports it as PyCapsule via the module dictionary
 under the name "CAPI".

 Other modules can now include the socketmodule.h file
 which defines the needed C APIs to import and set up
 a static copy of this struct in the importing module.

 After initialization, the importing module can then
 access the C APIs from the _socket module by simply
 referring to the static struct, e.g.

 Load _socket module and its C API; this sets up the global
 PySocketModule:

 if (PySocketModule_ImportModuleAndAPI())
 return;


 Now use the C API as if it were defined in the using
 module:

 if (!PyArg_ParseTuple(args, "O!|zz:ssl",

 PySocketModule.Sock_Type,

 (PyObject*)&Sock,
 &key_file, &cert_file))
 return NULL;

 Support could easily be extended to export more C APIs/symbols
 this way. Currently, only the type object is exported,
 other candidates would be socket constructors and socket
 access functions.

*/

/* C API for usage by other Python modules */
typedef struct {
 PyTypeObject *Sock_Type;
 PyObject *error;
 PyObject *timeout_error;
} PySocketModule_APIObject;

#define PySocketModule_ImportModuleAndAPI() PyCapsule_Import(PySocket_CAPSULE_NAME, 1)

#ifdef __cplusplus
}
#endif
#endif /* !Py__SOCKET_H */