1 // Copyright 2019 Google LLC 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 // The sandbox2::Namespace class defines ways of inserting the sandboxed process 16 // into Linux namespaces. 17 18 #ifndef SANDBOXED_API_SANDBOX2_NAMESPACE_H_ 19 #define SANDBOXED_API_SANDBOX2_NAMESPACE_H_ 20 21 #include <sched.h> 22 #include <sys/types.h> 23 24 #include <cstdint> 25 #include <string> 26 27 #include "sandboxed_api/sandbox2/forkserver.pb.h" 28 #include "sandboxed_api/sandbox2/mounts.h" 29 30 namespace sandbox2 { 31 32 class Namespace final { 33 public: 34 // Performs the namespace setup (mounts, write the uid_map, etc.). 35 static void InitializeNamespaces(uid_t uid, gid_t gid, int32_t clone_flags, 36 const Mounts& mounts, 37 const std::string& hostname, 38 bool avoid_pivot_root, 39 bool allow_mount_propagation); 40 static void InitializeInitialNamespaces(uid_t uid, gid_t gid); 41 42 Namespace(Mounts mounts, std::string hostname, NetNsMode netns_config, 43 bool allow_mount_propagation = false); 44 netns_config()45 NetNsMode netns_config() const { return netns_config_; } 46 clone_flags()47 int32_t clone_flags() const { return clone_flags_; } 48 mounts()49 Mounts& mounts() { return mounts_; } mounts()50 const Mounts& mounts() const { return mounts_; } 51 hostname()52 const std::string& hostname() const { return hostname_; } 53 allow_mount_propagation()54 bool allow_mount_propagation() const { return allow_mount_propagation_; } 55 56 private: 57 int32_t clone_flags_ = CLONE_NEWUSER | CLONE_NEWNS | CLONE_NEWUTS | 58 CLONE_NEWPID | CLONE_NEWIPC | CLONE_NEWNET; 59 Mounts mounts_; 60 std::string hostname_; 61 bool allow_mount_propagation_; 62 NetNsMode netns_config_; 63 }; 64 65 } // namespace sandbox2 66 67 #endif // SANDBOXED_API_SANDBOX2_NAMESPACE_H_ 68