Start on compat stuff.

2 files changed, 167 insertions, 0 deletions

diff --git a/src/nng_compat.c b/src/nng_compat.c
new file mode 100644
index 00000000..94a0b3aa
--- /dev/null
+++ b/src/nng_compat.c
@@ -0,0 +1,25 @@
+//
+// Copyright 2017 Garrett D'Amore <garrett@damore.org>
+//
+// This software is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+#include "nng.h"
+#include "nn_compat.h"
+
+// This file provides the "public" API.  This is a thin wrapper around
+// internal API functions.  We use the public prefix instead of internal,
+// to indicate that these interfaces are intended for applications to use
+// directly.
+//
+// Anything not defined in this file, applications have no business using.
+// Pretty much every function calls the nni_platform_init to check against
+// fork related activity.
+
+int
+nn_socket(int domain, int protocol)
+{
+}
\ No newline at end of file
diff --git a/src/nng_compat.h b/src/nng_compat.h
new file mode 100644
index 00000000..7b859831
--- /dev/null
+++ b/src/nng_compat.h
@@ -0,0 +1,142 @@
+//
+// Copyright 2017 Garrett D'Amore <garrett@damore.org>
+//
+// This software is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+#ifndef NNG_COMPAT_H
+#define NNG_COMPAT_H
+
+// This header contains interfaces that are intended to offer compatibility
+// with nanomsg v1.0.  These are not the "preferred" interfaces for nng,
+// and consumers should only use thse if they are porting software that
+// previously used nanomsg.  New programs should use the nng native APIs.
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <errno.h>
+#include <stddef.h>
+#include <stdint.h>
+
+// NNG_DECL is used on declarations to deal with scope.
+// For building Windows DLLs, it should be the appropriate
+// __declspec().  (We recommend *not* building this library
+// as a DLL, but instead linking it statically for your projects
+// to minimize questions about link dependencies later.)
+#ifndef NN_DECL
+#if defined(_WIN32) && !defined(NNG_STATIC_LIB)
+#if defined(NNG_SHARED_LIB)
+#define NN_DECL		__declspec(dllexport)
+#else
+#define NN_DECL		__declspec(dllimport)
+#endif // NNG_SHARED_LIB
+#else
+#define NN_DECL		extern
+#endif  // _WIN32 && !NNG_STATIC_LIB
+#endif  // NN_DECL
+
+#define AF_SP			1
+#define AF_SP_RAW		2
+
+#define NN_SOCKADDR_MAX		128
+#define NN_SOL_SOCKET		0
+
+// Flag for send/recv (nonblocking)
+#define NN_DONTWAIT		1
+
+// CMSG data type
+#define PROTO_SP		1
+#define SP_HDR			1
+
+// Socket options
+#define NN_LINGER		1
+#define NN_SNDBUF		2
+#define NN_RCVBUF		3
+#define NN_SNDTIMEO		5
+#define NN_RCVTIMEO		5
+#define NN_RECONNECT_IVL	6
+#define NN_RECONNECT_IVL_MAX	7
+#define NN_SNDPRIO		8
+#define NN_RCVPRIO		9
+#define NN_SNDFD		10
+#define NN_RCVFD		11
+#define NN_DOMAIN		12
+#define NN_PROTOCOL		13
+#define NN_IPV4ONLY		14
+#define NN_SOCKET_NAME		15
+#define NN_RCVMAXSIZE		16
+#define NN_MAXTTL		17
+
+// Poll stuff
+#define NN_POLLIN		1
+#define NN_POLLOUT		2
+struct nn_pollfd {
+	int		fd;
+	uint16_t	events;
+	uint16_t	revents;
+}
+
+// Magical size for allocation
+#define NN_MSG    ((size_t) -1)
+
+struct nn_iovec {
+	void *	iov_base;
+	size_t	iov_len;
+};
+
+struct nn_msghdr {
+	struct nn_iovec *	msg_iov;
+	int			msg_iovlen;
+	void *			msg_control;
+	size_t			msg_controllen;
+};
+
+struct nn_cmsghdr {
+	size_t	cmsg_len;
+	int	cmsg_level;
+	int	cmsg_type;
+};
+
+#define NN_ALIGN(len) \
+	(((len) + sizeof (size_t) - 1) & (size_t) ~(sizeof (size_t) - 1))
+#define NN_CMSG_FIRSTHDR(mh) \
+	nn_cmsg_nexthdr((struct nn_msghdr *) (mh), NULL)
+#define NN_CMSG_NEXTHDR(mh, ch)	\
+	nn_cmsg_nexthdr((struct nn_msghdr *) (mh), (struct nn_cmsghdr *) ch)
+#define NN_CMSG_DATA(ch) \
+	((unsigned char *) (((struct cmsghdr *) (ch)) + 1))
+#define NN_CMSG_SPACE(len) \
+	(NN_ALIGN(len) + NN_ALIGN(sizeof (struct nn_cmsghdr)))
+#define NN_CMSG_LEN(len) \
+	(NN_ALIGN(sizeof (nn_cmsghdr)) + (len))
+
+NN_DECL struct cmsg_hdr *nn_cmsg_nexthdr(const struct nn_msghdr *,
+    const struct nn_cmsghdr *);
+NN_DECL int nn_socket(int, int);
+NN_DECL int nn_setsockopt(int, int, int, const void *, size_t);
+NN_DECL int nn_getsockopt(int, int, int, void *, size_t *);
+NN_DECL int nn_bind(int, const char *);
+NN_DECL int nn_connect(int, const char *);
+NN_DECL int nn_shutdown(int, int);
+NN_DECL int nn_send(int, const void *, size_t, int);
+NN_DECL int nn_recv(int, void *, size_t, int);
+NN_DECL int nn_sendmsg(int, const struct nn_msghdr *, int);
+NN_DECL int nn_recvcmsg(int, struct nn_msghdr *, int);
+NN_DECL int nn_close(int);
+NN_DECL int nn_poll(struct nn_pollfd *, int, int);
+NN_DECL int nn_device(int, int);
+NN_DECL uint64_t nn_get_statistic(int, int);
+NN_DECL void *nn_allocmsg(size_t, int);
+NN_DECL void *nn_reallocmsg(void *, size_t);
+NN_DECL int nn_freemsg(void *);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // NNG_COMPAT_H