Beispiel #1
0
		public ReceivedMessage RecvMsg ()
		{
//			int r = 0;
//
//			do {
//				r = (int)recvmsg (Handle, bufP, flags);
//			} while (r < 0 && UnixError.ShouldRetry);
//
//			if (r < 0)
//				throw UnixError.GetLastUnixException ();
//
//			return r;

			var buffer2 = new byte[1024*10];
			var cmsg2 = new byte[1024*10];
			var msghdr2 = new Mono.Unix.Native.Msghdr {
				msg_control = cmsg2,
				msg_controllen = cmsg2.Length,
			};
			var result = new ReceivedMessage ();
			fixed (byte* ptr_buffer2 = buffer2) {
				var iovecs2 = new Mono.Unix.Native.Iovec[] {
					new Mono.Unix.Native.Iovec {
						iov_base = (IntPtr) ptr_buffer2,
						iov_len = (ulong) buffer2.Length,
					},
				};
				msghdr2.msg_iov = iovecs2;
				msghdr2.msg_iovlen = 1;
				//System.Console.WriteLine ("recvmsg");
				var ret = Mono.Unix.Native.Syscall.recvmsg (Handle, msghdr2,0);

				if (ret ==-1)  {
					var lastError = Marshal.GetLastWin32Error ();
					System.Console.WriteLine ("Last error " + lastError);
					System.Console.WriteLine ("Description" + Mono.Unix.UnixMarshal.GetErrorDescription((Mono.Unix.Native.Errno)lastError));
					Mono.Unix.UnixMarshal.ThrowExceptionForLastError ();
				}

				result.Read = ret;
				result.Message = buffer2;
			}
				
			#if UNIXFDS
			var fds = new global::System.Collections.Generic.List<int> ();
			for (long offset = Mono.Unix.Native.Syscall.CMSG_FIRSTHDR (msghdr2); offset != -1; offset = Mono.Unix.Native.Syscall.CMSG_NXTHDR (msghdr2, offset)) {
				var recvHdr = Mono.Unix.Native.Cmsghdr.ReadFromBuffer (msghdr2, offset);
				var recvDataOffset = Mono.Unix.Native.Syscall.CMSG_DATA (msghdr2, offset);
				var bytes = recvHdr.cmsg_len - (recvDataOffset - offset);
				//Assert.AreEqual (bytes % sizeof (int), 0);
				var fdCount = bytes / sizeof (int);
				//System.Console.WriteLine("based on struct size, there should be "+fdCount+" fds");
				fixed (byte* ptr = msghdr2.msg_control)
				for (int i = 0; i < fdCount; i++)
					fds.Add (((int*) (ptr + recvDataOffset))[i]);
			}
			if(fds.Count>0)
			{
				result.FileDescriptors = fds.ToArray ();
			}
			#endif
			return result;
		}
Beispiel #2
0
        public ReceivedMessage RecvMsg()
        {
//			int r = 0;
//
//			do {
//				r = (int)recvmsg (Handle, bufP, flags);
//			} while (r < 0 && UnixError.ShouldRetry);
//
//			if (r < 0)
//				throw UnixError.GetLastUnixException ();
//
//			return r;

            var buffer2 = new byte[1024 * 10];
            var cmsg2   = new byte[1024 * 10];
            var msghdr2 = new Mono.Unix.Native.Msghdr {
                msg_control    = cmsg2,
                msg_controllen = cmsg2.Length,
            };
            var result = new ReceivedMessage();

            fixed(byte *ptr_buffer2 = buffer2)
            {
                var iovecs2 = new Mono.Unix.Native.Iovec[] {
                    new Mono.Unix.Native.Iovec {
                        iov_base = (IntPtr)ptr_buffer2,
                        iov_len  = (ulong)buffer2.Length,
                    },
                };

                msghdr2.msg_iov    = iovecs2;
                msghdr2.msg_iovlen = 1;
                //System.Console.WriteLine ("recvmsg");
                var ret = Mono.Unix.Native.Syscall.recvmsg(Handle, msghdr2, 0);

                if (ret == -1)
                {
                    var lastError = Marshal.GetLastWin32Error();
                    System.Console.WriteLine("Last error " + lastError);
                    System.Console.WriteLine("Description" + Mono.Unix.UnixMarshal.GetErrorDescription((Mono.Unix.Native.Errno)lastError));
                    Mono.Unix.UnixMarshal.ThrowExceptionForLastError();
                }

                result.Read    = ret;
                result.Message = buffer2;
            }

                        #if UNIXFDS
            var fds = new global::System.Collections.Generic.List <int> ();
            for (long offset = Mono.Unix.Native.Syscall.CMSG_FIRSTHDR(msghdr2); offset != -1; offset = Mono.Unix.Native.Syscall.CMSG_NXTHDR(msghdr2, offset))
            {
                var recvHdr        = Mono.Unix.Native.Cmsghdr.ReadFromBuffer(msghdr2, offset);
                var recvDataOffset = Mono.Unix.Native.Syscall.CMSG_DATA(msghdr2, offset);
                var bytes          = recvHdr.cmsg_len - (recvDataOffset - offset);
                //Assert.AreEqual (bytes % sizeof (int), 0);
                var fdCount = bytes / sizeof(int);

                //System.Console.WriteLine("based on struct size, there should be "+fdCount+" fds");
                fixed(byte *ptr = msghdr2.msg_control)
                for (int i = 0; i < fdCount; i++)
                {
                    fds.Add(((int *)(ptr + recvDataOffset))[i]);
                }
            }
            if (fds.Count > 0)
            {
                result.FileDescriptors = fds.ToArray();
            }
                        #endif
            return(result);
        }