/*
* Copyright (C) Igor Sysoev
* Copyright (C) NGINX, Inc.
*/
#ifndef _NXT_UNIX_SOCKET_H_INCLUDED_
#define _NXT_UNIX_SOCKET_H_INCLUDED_
typedef int nxt_socket_t;
#define NXT_NONBLOCK 1
/*
* struct sockaddr and struct sockaddr_in are 16 bytes.
*
* struct sockaddr_in6 is:
* 28 bytes on Linux, FreeBSD, MacOSX, NetBSD, OpenBSD, AIX, HP-UX;
* 32 bytes on Solaris.
*
*
* struct sockaddr_un is:
* 94 bytes on HP-UX;
* 106 bytes on FreeBSD, MacOSX, NetBSD, OpenBSD;
* 110 bytes on Linux, Solaris;
* 1025 bytes on AIX.
*
* The real maximum sockaddr_un length however different from defined length:
* OpenBSD can accept and return 105 bytes if address is not
* zero-terminated;
* Linux can accept 110 bytes and return 111 bytes;
* MacOSX and NetBSD can accept and return 255 bytes;
* Solaris can accept 257 bytes and return 258 bytes;
* FreeBSD maximum sockaddr_un length is equal to defined length.
*
* POSIX.1g renamed AF_UNIX to AF_LOCAL, however, Solaris up to 10
* version lacks AF_LOCAL. AF_UNIX is defined even on Windows although
* struct sockaddr_un is not.
*
* Unix domain socket address without a trailing zero is accepted at least by:
* Linux, FreeBSD, Solaris, MacOSX, NetBSD, and OpenBSD.
* Linux and Solaris add the trailing zero and return sockaddr_un length
* increased by one. Others return sockaddr_un without the trailing zero.
*
* For unspecified Unix domain socket address
* NetBSD returns sockaddr_un length equal to 106 and fills sun_path[]
* with zeros;
* FreeBSD, Solaris, MacOSX, and OpenBSD return sockaddr_un length
* equal to 16 and fill sun_path[] with zeros;
* Linux returns sockaddr_un length equal to 2 without sun_path[];
*
* 4.4BSD getsockname() and getpeername() returned zero length.
* This behaviour has been inherited by BSD flavours and has been
* eventually changed in NetBSD 1.2, FreeBSD 3.0, and OpenBSD 5.3.
*
*
* struct sockaddr_storage is:
* 128 bytes on Linux, FreeBSD, MacOSX, NetBSD;
* 256 bytes on Solaris, OpenBSD, and HP-UX;
* 1288 bytes on AIX.
*
* struct sockaddr_storage is too large on some platforms
* or less than real maximum struct sockaddr_un length.
*/
#if (NXT_HAVE_UNIX_DOMAIN)
#define NXT_SOCKADDR_LEN sizeof(struct sockaddr_un)
#elif (NXT_HAVE_SOCKADDR_IN6)
#define NXT_SOCKADDR_LEN sizeof(struct sockaddr_in6)
#else
#define NXT_SOCKADDR_LEN sizeof(struct sockaddr_in)
#endif
typedef union {
struct sockaddr buf;
uint64_t alignment;
char space[NXT_SOCKADDR_LEN];
} nxt_sockaddr_buf_t;
/*
* MAXHOSTNAMELEN is:
* 64 on Linux;
* 256 on FreeBSD, Solaris, MacOSX, NetBSD, OpenBSD.
*/
#define NXT_MAXHOSTNAMELEN MAXHOSTNAMELEN
typedef enum {
NXT_SOCKET_ERROR_IGNORE = 0x1,
NXT_SOCKET_ECONNRESET_IGNORE = 0x2,
NXT_SOCKET_EINVAL_IGNORE = 0x4,
} nxt_socket_error_level_t;
NXT_EXPORT nxt_socket_t nxt_socket_create(nxt_uint_t family, nxt_uint_t type,
nxt_uint_t protocol, nxt_uint_t flags);
NXT_EXPORT void nxt_socket_close(nxt_socket_t s);
NXT_EXPORT nxt_int_t nxt_socket_getsockopt(nxt_socket_t s, nxt_uint_t level,
nxt_uint_t sockopt);
NXT_EXPORT nxt_int_t nxt_socket_setsockopt(nxt_socket_t s, nxt_uint_t level,
nxt_uint_t sockopt, int val);
NXT_EXPORT nxt_int_t nxt_socket_bind(nxt_socket_t s, nxt_sockaddr_t *sa,
nxt_bool_t test);
NXT_EXPORT nxt_int_t nxt_socket_connect(nxt_socket_t s, nxt_sockaddr_t *sa);
NXT_EXPORT void nxt_socket_shutdown(nxt_socket_t s, nxt_uint_t how);
nxt_uint_t nxt_socket_error_level(nxt_err_t err,
nxt_socket_error_level_t level);
NXT_EXPORT nxt_int_t nxt_socketpair_create(nxt_socket_t *pair);
NXT_EXPORT void nxt_socketpair_close(nxt_socket_t *pair);
NXT_EXPORT ssize_t nxt_socketpair_send(nxt_event_fd_t *ev, nxt_fd_t fd,
nxt_iobuf_t *iob, nxt_uint_t niob);
NXT_EXPORT ssize_t nxt_socketpair_recv(nxt_event_fd_t *ev, nxt_fd_t *fd,
nxt_iobuf_t *iob, nxt_uint_t niob);
#define \
nxt_socket_nonblocking(fd) \
nxt_fd_nonblocking(fd)
#define \
nxt_socket_blocking(fd) \
nxt_fd_blocking(fd)
#endif /* _NXT_UNIX_SOCKET_H_INCLUDED_ */
