Socket subsystem implementation

libraries/nacl-mounts/net/IOInterfaces.h

+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef FILE_INTERFACES_H
+#define FILE_INTERFACES_H
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdarg.h>
+#include <string.h>
+#include <sys/dir.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <termios.h>
+#include <unistd.h>
+
+#include "../base/nacl_dirent.h"
+
+class FileStream {
+ public:
+  virtual ~FileStream() {}
+
+  virtual void addref() = 0;
+  virtual void release() = 0;
+  virtual FileStream* dup(int fd) = 0;
+
+  virtual void close() = 0;
+  virtual int read(char* buf, size_t count, size_t* nread) = 0;
+  virtual int write(const char* buf, size_t count, size_t* nwrote) = 0;
+  virtual int seek(nacl_abi_off_t offset, int whence,
+                   nacl_abi_off_t* new_offset) {
+    return ESPIPE;
+  }
+  virtual int fstat(nacl_abi_stat* out) {
+    memset(out, 0, sizeof(nacl_abi_stat));
+    return 0;
+  }
+  virtual int getdents(dirent* buf, size_t count, size_t* nread) {
+    return ENOTDIR;
+  }
+
+  virtual int isatty() {
+    errno = EINVAL;
+    return 0;
+  }
+  virtual int tcgetattr(termios* termios_p) {
+    errno = EINVAL;
+    return -1;
+  }
+  virtual int tcsetattr(int optional_actions, const termios* termios_p) {
+    errno = EINVAL;
+    return -1;
+  }
+  virtual int fcntl(int cmd,  va_list ap) {
+    errno = EINVAL;
+    return -1;
+  }
+  virtual int ioctl(int request,  va_list ap) {
+    errno = EINVAL;
+    return -1;
+  }
+
+  virtual bool is_read_ready() {
+    return true;
+  }
+  virtual bool is_write_ready() {
+    return true;
+  }
+  virtual bool is_exception() {
+    return false;
+  }
+};
+
+class PathHandler {
+ public:
+  virtual ~PathHandler() {}
+
+  virtual void addref() = 0;
+  virtual void release() = 0;
+
+  virtual FileStream* open(int fd, const char* pathname, int oflag) = 0;
+  virtual int stat(const char* pathname, nacl_abi_stat* out) = 0;
+};
+
+class InputInterface {
+ public:
+  virtual ~InputInterface() {}
+
+  virtual void OnOpen(bool success) = 0;
+  virtual void OnRead(const char* buf, size_t size) = 0;
+  virtual void OnClose() = 0;
+};
+
+class OutputInterface {
+ public:
+  virtual ~OutputInterface() {}
+
+  virtual bool OpenFile(int fd, const char* name, int mode,
+                        InputInterface* stream) = 0;
+  virtual bool OpenSocket(int fd, const char* host, uint16_t port,
+                          InputInterface* stream) = 0;
+  virtual bool Write(int fd, const char* data, size_t size) = 0;
+  virtual bool Read(int fd, size_t size) = 0;
+  virtual bool Close(int fd) = 0;
+};
+
+#endif  // FILE_INTERFACES_H
+