diff --git a/src/include/os/cygwin32/osiSock.h b/src/include/os/cygwin32/osiSock.h
new file mode 100644
index 000000000..a0c834e6f
--- /dev/null
+++ b/src/include/os/cygwin32/osiSock.h
@@ -0,0 +1,82 @@
+/*
+ * cygwin32 specific include
+ */
+
+
+#ifndef osiSockH
+#define osiSockH
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <errno.h>
+
+#include <sys/types.h>
+#include <sys/param.h> /* for MAXHOSTNAMELEN */
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+#include <netdb.h>
+#include <unistd.h> /* close() and others */
+ 
+void ipAddrToA(const struct sockaddr_in *pInetAddr, 
+		char *pBuf, const unsigned bufSize);
+
+/*
+ * as far as I can tell there is no header file for these
+ */
+int gethostname(char *name, int namelen);
+int sethostname(char *name, int namelen);
+
+#ifdef __cplusplus
+}
+#endif
+ 
+typedef int                     SOCKET;
+#define INVALID_SOCKET		(-1)
+#define SOCKERRNO               errno
+#define socket_close(S)         close(S)
+#define socket_ioctl(A,B,C)     ioctl(A,B,C)
+
+#define FD_IN_FDSET(FD) ((FD)<FD_SETSIZE)
+
+/*
+ * Windows Sockets errors redefined as regular Berkeley error constants
+ */
+#define ETIMEDOUT		WSAETIMEDOUT
+
+/*
+ * All Windows Sockets error constants are biased by WSABASEERR from
+ * the "normal"
+ */
+#define WSABASEERR		10000
+#define WSAETIMEDOUT		(WSABASEERR+60)
+
+
+#define	IOCPARM_MASK	0xff		/* parameters must be < 256 bytes */
+#define	IOC_OUT		0x40000000	/* copy out parameters */
+#define	IOC_IN		0x80000000	/* copy in parameters */
+#define	IOC_INOUT	(IOC_IN|IOC_OUT)
+
+#define _IOWR(x, y, t) \
+        (IOC_INOUT|((((int)sizeof (t))&IOCPARM_MASK)<<16)|(x<<8)|y)
+ 
+/* Used by ca/if_depends.c */
+#define    SIOCGIFDSTADDR  _IOWR('i', 15, struct ifreq)    /* get p-p address */
+#define    SIOCGIFADDR     _IOWR('i', 13, struct ifreq)    /* get ifnet address */
+
+/* Used by ca/if_depends.c db/drvTS.c dbtools/BSlib.c */
+#define    SIOCGIFBRDADDR  _IOWR('i', 23, struct ifreq)    /* get broadcast addr */
+
+
+/* Used by ca/if_depends.c ca/ucx.h */
+#define    IFF_POINTOPOINT 0x10
+
+
+
+#endif /*osiSockH*/
+
diff --git a/src/libCom/osi/os/cygwin32/osdSock.h b/src/libCom/osi/os/cygwin32/osdSock.h
new file mode 100644
index 000000000..a0c834e6f
--- /dev/null
+++ b/src/libCom/osi/os/cygwin32/osdSock.h
@@ -0,0 +1,82 @@
+/*
+ * cygwin32 specific include
+ */
+
+
+#ifndef osiSockH
+#define osiSockH
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <errno.h>
+
+#include <sys/types.h>
+#include <sys/param.h> /* for MAXHOSTNAMELEN */
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+#include <netdb.h>
+#include <unistd.h> /* close() and others */
+ 
+void ipAddrToA(const struct sockaddr_in *pInetAddr, 
+		char *pBuf, const unsigned bufSize);
+
+/*
+ * as far as I can tell there is no header file for these
+ */
+int gethostname(char *name, int namelen);
+int sethostname(char *name, int namelen);
+
+#ifdef __cplusplus
+}
+#endif
+ 
+typedef int                     SOCKET;
+#define INVALID_SOCKET		(-1)
+#define SOCKERRNO               errno
+#define socket_close(S)         close(S)
+#define socket_ioctl(A,B,C)     ioctl(A,B,C)
+
+#define FD_IN_FDSET(FD) ((FD)<FD_SETSIZE)
+
+/*
+ * Windows Sockets errors redefined as regular Berkeley error constants
+ */
+#define ETIMEDOUT		WSAETIMEDOUT
+
+/*
+ * All Windows Sockets error constants are biased by WSABASEERR from
+ * the "normal"
+ */
+#define WSABASEERR		10000
+#define WSAETIMEDOUT		(WSABASEERR+60)
+
+
+#define	IOCPARM_MASK	0xff		/* parameters must be < 256 bytes */
+#define	IOC_OUT		0x40000000	/* copy out parameters */
+#define	IOC_IN		0x80000000	/* copy in parameters */
+#define	IOC_INOUT	(IOC_IN|IOC_OUT)
+
+#define _IOWR(x, y, t) \
+        (IOC_INOUT|((((int)sizeof (t))&IOCPARM_MASK)<<16)|(x<<8)|y)
+ 
+/* Used by ca/if_depends.c */
+#define    SIOCGIFDSTADDR  _IOWR('i', 15, struct ifreq)    /* get p-p address */
+#define    SIOCGIFADDR     _IOWR('i', 13, struct ifreq)    /* get ifnet address */
+
+/* Used by ca/if_depends.c db/drvTS.c dbtools/BSlib.c */
+#define    SIOCGIFBRDADDR  _IOWR('i', 23, struct ifreq)    /* get broadcast addr */
+
+
+/* Used by ca/if_depends.c ca/ucx.h */
+#define    IFF_POINTOPOINT 0x10
+
+
+
+#endif /*osiSockH*/
+