diff options
Diffstat (limited to 'base/unix_domain_socket_posix.h')
| -rw-r--r-- | base/unix_domain_socket_posix.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/base/unix_domain_socket_posix.h b/base/unix_domain_socket_posix.h index c0b40e8..4274a64 100644 --- a/base/unix_domain_socket_posix.h +++ b/base/unix_domain_socket_posix.h @@ -8,6 +8,8 @@ #include <sys/types.h> #include <vector> +class Pickle; + namespace base { // Use sendmsg to write the given msg and include a vector @@ -17,6 +19,22 @@ bool SendMsg(int fd, const void* msg, size_t length, // Use recvmsg to read a message and an array of file descriptors. Returns // -1 on failure. Note: will read, at most, 16 descriptors. ssize_t RecvMsg(int fd, void* msg, size_t length, std::vector<int>* fds); +// Perform a sendmsg/recvmsg pair. +// 1. This process creates a UNIX DGRAM socketpair. +// 2. This proces writes a request to |fd| with an SCM_RIGHTS control message +// containing on end of the fresh socket pair. +// 3. This process blocks reading from the other end of the fresh socketpair. +// 4. The target process receives the request, processes it and writes the +// reply to the end of the socketpair contained in the request. +// 5. This process wakes up and continues. +// +// fd: descriptor to send the request on +// reply: buffer for the reply +// reply_len: size of |reply| +// result_fd: (may be NULL) the file descriptor returned in the reply (if any) +// request: the bytes to send in the request +ssize_t SendRecvMsg(int fd, uint8_t* reply, unsigned reply_len, int* result_fd, + const Pickle& request); } // namespace base |