eal/windows: improve compatibility networking headers

Extend compatibility header system to support librte_cmdline.

pthread.h has to include windows.h, which exposes struct in_addr, etc.
conflicting with compatibility headers. WIN32_LEAN_AND_MEAN macro
is required to disable this behavior. Use rte_windows.h to define
WIN32_LEAN_AND_MEAN for pthread library.

Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>

lib/librte_eal/windows/include/arpa/inet.h

@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright (c) 2020 Dmitry Kozlyuk
+ */
+
+#ifndef _ARPA_INET_H_
+#define _ARPA_INET_H_
+
+/**
+ * @file
+ *
+ * Compatibility header
+ *
+ * Although symbols declared here are present on Windows,
+ * including <winsock2.h> would expose too much macros breaking common code.
+ */
+
+#include <netinet/in.h>
+#include <sys/socket.h>
+
+/* defined in ws2_32.dll */
+__attribute__((stdcall))
+int
+inet_pton(int af, const char *src, void *dst);
+
+/* defined in ws2_32.dll */
+__attribute__((stdcall))
+const char *
+inet_ntop(int af, const void *src, char *dst, socklen_t size);
+
+#endif /* _ARPA_INET_H_ */

lib/librte_eal/windows/include/netinet/in.h

@@ -5,6 +5,8 @@
 #ifndef _IN_H_
 #define _IN_H_
 
+#include <sys/socket.h>
+
 #define IPPROTO_IP         0
 #define IPPROTO_HOPOPTS    0
 #define IPPROTO_ICMP       1
@@ -22,4 +24,14 @@
 #define IPPROTO_DSTOPTS   60
 #define IPPROTO_SCTP     132
 
+#define INET6_ADDRSTRLEN 46
+
+struct in_addr {
+	uint32_t s_addr;
+};
+
+struct in6_addr {
+	uint8_t s6_addr[16];
+};
+
 #endif

lib/librte_eal/windows/include/sys/socket.h

@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright (c) 2020 Dmitry Kozlyuk
+ */
+
+#ifndef _SYS_SOCKET_H_
+#define _SYS_SOCKET_H_
+
+/**
+ * @file
+ *
+ * Compatibility header
+ *
+ * Although symbols declared here are present on Windows,
+ * including <winsock2.h> would expose too much macros breaking common code.
+ */
+
+#include <stddef.h>
+
+#define AF_INET  2
+#define AF_INET6 23
+
+typedef size_t socklen_t;
+
+#endif /* _SYS_SOCKET_H_ */