mirror of
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62 lines
2.0 KiB
C++
62 lines
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_SandboxBrokerTypes_h
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#define mozilla_SandboxBrokerTypes_h
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#include <sys/types.h>
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struct iovec;
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// This file defines the protocol between the filesystem broker,
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// described in SandboxBroker.h, and its client, described in
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// ../SandboxBrokerClient.h; and it defines some utility functions
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// used by both.
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//
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// In order to keep the client simple while allowing it to be thread
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// safe and async signal safe, the main broker socket is used only for
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// requests; responses arrive on a per-request socketpair sent with
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// the request. (This technique is also used by Chromium and Breakpad.)
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namespace mozilla {
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class SandboxBrokerCommon {
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public:
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enum Operation {
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SANDBOX_FILE_OPEN,
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SANDBOX_FILE_ACCESS,
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SANDBOX_FILE_STAT,
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};
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struct Request {
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Operation mOp;
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// For open, flags; for access, "mode"; for stat, O_NOFOLLOW for lstat.
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int mFlags;
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// The rest of the packet is the pathname.
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// SCM_RIGHTS for response socket attached.
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};
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struct Response {
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int mError; // errno, or 0 for no error
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// Followed by struct stat for stat/lstat.
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// SCM_RIGHTS attached for successful open.
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};
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// This doesn't need to be the system's maximum path length, just
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// the largest path that would be allowed by any policy. (It's used
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// to size a stack-allocated buffer.)
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static const size_t kMaxPathLen = 4096;
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static ssize_t RecvWithFd(int aFd, const iovec* aIO, size_t aNumIO,
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int* aPassedFdPtr);
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static ssize_t SendWithFd(int aFd, const iovec* aIO, size_t aNumIO,
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int aPassedFd);
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};
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} // namespace mozilla
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#endif // mozilla_SandboxBrokerTypes_h
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