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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef BASE_POSIX_UNIX_DOMAIN_SOCKET_LINUX_H_ | 5 #ifndef BASE_POSIX_UNIX_DOMAIN_SOCKET_LINUX_H_ |
6 #define BASE_POSIX_UNIX_DOMAIN_SOCKET_LINUX_H_ | 6 #define BASE_POSIX_UNIX_DOMAIN_SOCKET_LINUX_H_ |
7 | 7 |
8 #include <stdint.h> | 8 #include <stdint.h> |
9 #include <sys/types.h> | 9 #include <sys/types.h> |
10 #include <vector> | 10 #include <vector> |
11 | 11 |
12 #include "base/base_export.h" | 12 #include "base/base_export.h" |
| 13 #include "base/files/scoped_file.h" |
| 14 #include "base/memory/scoped_vector.h" |
13 #include "base/process/process_handle.h" | 15 #include "base/process/process_handle.h" |
14 | 16 |
15 class Pickle; | 17 class Pickle; |
16 | 18 |
17 class BASE_EXPORT UnixDomainSocket { | 19 class BASE_EXPORT UnixDomainSocket { |
18 public: | 20 public: |
19 // Maximum number of file descriptors that can be read by RecvMsg(). | 21 // Maximum number of file descriptors that can be read by RecvMsg(). |
20 static const size_t kMaxFileDescriptors; | 22 static const size_t kMaxFileDescriptors; |
21 | 23 |
22 // Use to enable receiving process IDs in RecvMsgWithPid. Should be called on | 24 // Use to enable receiving process IDs in RecvMsgWithPid. Should be called on |
23 // the receiving socket (i.e., the socket passed to RecvMsgWithPid). Returns | 25 // the receiving socket (i.e., the socket passed to RecvMsgWithPid). Returns |
24 // true if successful. | 26 // true if successful. |
25 static bool EnableReceiveProcessId(int fd); | 27 static bool EnableReceiveProcessId(int fd); |
26 | 28 |
27 // Use sendmsg to write the given msg and include a vector of file | 29 // Use sendmsg to write the given msg and include a vector of file |
28 // descriptors. Returns true if successful. | 30 // descriptors. Returns true if successful. |
29 static bool SendMsg(int fd, | 31 static bool SendMsg(int fd, |
30 const void* msg, | 32 const void* msg, |
31 size_t length, | 33 size_t length, |
32 const std::vector<int>& fds); | 34 const std::vector<int>& fds); |
33 | 35 |
34 // Use recvmsg to read a message and an array of file descriptors. Returns | 36 // Use recvmsg to read a message and an array of file descriptors. Returns |
35 // -1 on failure. Note: will read, at most, |kMaxFileDescriptors| descriptors. | 37 // -1 on failure. Note: will read, at most, |kMaxFileDescriptors| descriptors. |
36 static ssize_t RecvMsg(int fd, | 38 static ssize_t RecvMsg(int fd, |
37 void* msg, | 39 void* msg, |
38 size_t length, | 40 size_t length, |
39 std::vector<int>* fds); | 41 ScopedVector<base::ScopedFD>* fds); |
40 | 42 |
41 // Same as RecvMsg above, but also returns the sender's process ID (as seen | 43 // Same as RecvMsg above, but also returns the sender's process ID (as seen |
42 // from the caller's namespace). However, before using this function to | 44 // from the caller's namespace). However, before using this function to |
43 // receive process IDs, EnableReceiveProcessId() should be called on the | 45 // receive process IDs, EnableReceiveProcessId() should be called on the |
44 // receiving socket. | 46 // receiving socket. |
45 static ssize_t RecvMsgWithPid(int fd, | 47 static ssize_t RecvMsgWithPid(int fd, |
46 void* msg, | 48 void* msg, |
47 size_t length, | 49 size_t length, |
48 std::vector<int>* fds, | 50 ScopedVector<base::ScopedFD>* fds, |
49 base::ProcessId* pid); | 51 base::ProcessId* pid); |
50 | 52 |
51 // Perform a sendmsg/recvmsg pair. | 53 // Perform a sendmsg/recvmsg pair. |
52 // 1. This process creates a UNIX SEQPACKET socketpair. Using | 54 // 1. This process creates a UNIX SEQPACKET socketpair. Using |
53 // connection-oriented sockets (SEQPACKET or STREAM) is critical here, | 55 // connection-oriented sockets (SEQPACKET or STREAM) is critical here, |
54 // because if one of the ends closes the other one must be notified. | 56 // because if one of the ends closes the other one must be notified. |
55 // 2. This process writes a request to |fd| with an SCM_RIGHTS control | 57 // 2. This process writes a request to |fd| with an SCM_RIGHTS control |
56 // message containing on end of the fresh socket pair. | 58 // message containing on end of the fresh socket pair. |
57 // 3. This process blocks reading from the other end of the fresh | 59 // 3. This process blocks reading from the other end of the fresh |
58 // socketpair. | 60 // socketpair. |
(...skipping 20 matching lines...) Expand all Loading... |
79 unsigned reply_len, | 81 unsigned reply_len, |
80 int recvmsg_flags, | 82 int recvmsg_flags, |
81 int* result_fd, | 83 int* result_fd, |
82 const Pickle& request); | 84 const Pickle& request); |
83 private: | 85 private: |
84 // Similar to RecvMsg, but allows to specify |flags| for recvmsg(2). | 86 // Similar to RecvMsg, but allows to specify |flags| for recvmsg(2). |
85 static ssize_t RecvMsgWithFlags(int fd, | 87 static ssize_t RecvMsgWithFlags(int fd, |
86 void* msg, | 88 void* msg, |
87 size_t length, | 89 size_t length, |
88 int flags, | 90 int flags, |
89 std::vector<int>* fds, | 91 ScopedVector<base::ScopedFD>* fds, |
90 base::ProcessId* pid); | 92 base::ProcessId* pid); |
91 }; | 93 }; |
92 | 94 |
93 #endif // BASE_POSIX_UNIX_DOMAIN_SOCKET_LINUX_H_ | 95 #endif // BASE_POSIX_UNIX_DOMAIN_SOCKET_LINUX_H_ |
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