Initial version.

src/nxt_socket.h

@@ -0,0 +1,132 @@
+
+/*
+ * 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_ */