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Add unix domain socket support to redbean
This commit is contained in:
Justine Tunney
parent
4b23985b7f
commit
fc097ac275
25 changed files with 594 additions and 172 deletions
89
tool/net/demo/unix-unix.lua
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89
tool/net/demo/unix-unix.lua
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@ -0,0 +1,89 @@
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-- UNIX Domain Sockets Example
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-- So we can detect that child died.
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died = false
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function OnSigchld(sig)
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died = true
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unix.wait() -- Prevent it from becoming a zombie
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end
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assert(unix.sigaction(unix.SIGCHLD, OnSigchld))
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-- So keyboard interurpts only go to subprocess.
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oldint = assert(unix.sigaction(unix.SIGINT, unix.SIG_IGN))
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oldquit = assert(unix.sigaction(unix.SIGQUIT, unix.SIG_IGN))
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-- UNIX domain sockets need a file
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tmpdir = os.getenv('TMPDIR') or '/tmp'
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unixpath = '%s/redbean-unix.sock.%d' % {tmpdir, unix.getpid()}
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-- Create child process which is the server.
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child = assert(unix.fork())
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if child == 0 then
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server = assert(unix.socket(unix.AF_UNIX, unix.SOCK_STREAM))
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assert(unix.setsockopt(server, unix.SOL_SOCKET, unix.SO_RCVTIMEO, 2))
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assert(unix.bind(server, unixpath))
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assert(unix.listen(server))
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client = assert(unix.accept(server))
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data = assert(unix.read(client))
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assert(data == 'ping!')
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assert(assert(unix.write(client, 'pong!')) == 5)
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assert(unix.close(client))
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unix.exit(0)
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end
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-- Wait for the child to create the the socket file.
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function FileExists(path)
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st, err = unix.stat(path)
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return not err
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end
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expobackoff = 1
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while not died do
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if FileExists(unixpath) then
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break
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else
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expobackoff = expobackoff << 1
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unix.nanosleep(expobackoff // 1000000000,
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expobackoff % 1000000000)
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end
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end
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-- Now connect to the socket.
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if not died then
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client = assert(unix.socket(unix.AF_UNIX, unix.SOCK_STREAM))
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assert(unix.connect(client, unixpath))
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assert(assert(unix.write(client, 'ping!')) == 5)
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data = assert(unix.read(client))
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assert(data == 'pong!')
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itworked = true
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else
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itworked = false
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end
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-- Wait for client to terminate. We don't check error here because if
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-- the child already died and the signal handler reaped it, then this
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-- returns a ECHILD error which is fine.
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unix.wait()
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assert(itworked)
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-- Now clean up the socket file.
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unix.unlink(unixpath)
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SetStatus(200)
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SetHeader('Connection', 'close') -- be lazy and let _Exit() clean up signal handlers
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SetHeader('Content-Type', 'text/html; charset=utf-8')
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Write('<!doctype html>\r\n')
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Write('<title>redbean unix domain sockets example</title>\r\n')
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Write('<h1>\r\n')
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Write('<img style="vertical-align:middle" src="data:image/png;base64,\r\n')
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Write(EncodeBase64(LoadAsset('/redbean.png')))
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Write('">\r\n')
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Write('redbean unix domain sockets example\r\n')
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Write('</h1>\r\n')
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Write([[
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<p>
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<strong>It worked!</strong> We successfully sent a ping
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pong via UNIX local sockets. Please check out the source
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code to this example inside your redbean at unix-unix.lua.
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</p>
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]])
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Write('</h1>\r\n')
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@ -2546,8 +2546,10 @@ UNIX MODULE
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`family` defaults to `AF_INET` and can be:
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- `AF_UNIX`
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- `AF_INET`
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- `AF_INET`: Creates Internet Protocol Version 4 (IPv4) socket.
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- `AF_UNIX`: Creates local UNIX domain socket. On the New Technology
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this requires Windows 10 and only works with `SOCK_STREAM`.
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`type` defaults to `SOCK_STREAM` and can be:
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@ -2562,7 +2564,8 @@ UNIX MODULE
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- `SOCK_CLOEXEC`
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- `SOCK_NONBLOCK`
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`protocol` defaults to `IPPROTO_TCP` and can be:
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`protocol` defaults to `IPPROTO_TCP` for AF_INET` and `0` for
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`AF_UNIX`. It can also be:
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- `IPPROTO_IP`
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- `IPPROTO_ICMP`
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@ -2592,6 +2595,7 @@ UNIX MODULE
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`protocol` defaults to `0`.
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unix.bind(fd:int[, ip:uint32, port:uint16])
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unix.bind(fd:int[, unixpath:str])
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├─→ true
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└─→ nil, unix.Errno
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@ -2743,6 +2747,7 @@ UNIX MODULE
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unix.accept(serverfd:int[, flags:int])
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├─→ clientfd:int, ip:uint32, port:uint16
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├─→ clientfd:int, unixpath:str
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└─→ nil, unix.Errno
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Accepts new client socket descriptor for a listening tcp socket.
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@ -2753,6 +2758,7 @@ UNIX MODULE
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- `SOCK_NONBLOCK`
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unix.connect(fd:int, ip:uint32, port:uint16)
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unix.connect(fd:int, unixpath:str)
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├─→ true
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└─→ nil, unix.Errno
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@ -2764,16 +2770,21 @@ UNIX MODULE
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unix.getsockname(fd:int)
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├─→ ip:uint32, port:uint16
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├─→ unixpath:str
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└─→ nil, unix.Errno
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Retrieves the local address of a socket.
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unix.getpeername(fd:int)
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├─→ ip:uint32, port:uint16
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├─→ unixpath:str
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└─→ nil, unix.Errno
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Retrieves the remote address of a socket.
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This operation will either fail on `AF_UNIX` sockets or return an
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empty string.
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unix.recv(fd:int[, bufsiz:int[, flags:int]])
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├─→ data:str
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└─→ nil, unix.Errno
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@ -2787,6 +2798,7 @@ UNIX MODULE
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unix.recvfrom(fd:int[, bufsiz:int[, flags:int]])
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├─→ data:str, ip:uint32, port:uint16
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├─→ data:str, unixpath:str
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└─→ nil, unix.Errno
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`flags` may have any combination (using bitwise OR) of:
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@ -2810,6 +2822,7 @@ UNIX MODULE
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- `MSG_NOSIGNAL`
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unix.sendto(fd:int, data:str, ip:uint32, port:uint16[, flags:int])
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unix.sendto(fd:int, data:str, unixpath:str[, flags:int])
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├─→ sent:int
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└─→ nil, unix.Errno
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@ -167,6 +167,7 @@ o/tinylinux/tool/net/redbean.com: \
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o/$(MODE)/tool/net/demo/.init.lua.zip.o \
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o/$(MODE)/tool/net/demo/.reload.lua.zip.o \
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o/$(MODE)/tool/net/demo/sql.lua.zip.o \
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o/$(MODE)/tool/net/demo/unix-unix.lua.zip.o \
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o/$(MODE)/tool/net/demo/unix-rawsocket.lua.zip.o \
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o/$(MODE)/tool/net/demo/unix-subprocess.lua.zip.o \
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o/$(MODE)/tool/net/demo/unix-webserver.lua.zip.o \
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@ -215,6 +216,7 @@ o/$(MODE)/tool/net/redbean-demo.com.dbg: \
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o/$(MODE)/tool/net/largon2.o \
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o/$(MODE)/tool/net/net.pkg \
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o/$(MODE)/tool/net/demo/sql.lua.zip.o \
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o/$(MODE)/tool/net/demo/unix-unix.lua.zip.o \
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o/$(MODE)/tool/net/demo/unix-rawsocket.lua.zip.o \
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o/$(MODE)/tool/net/demo/unix-subprocess.lua.zip.o \
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o/$(MODE)/tool/net/demo/unix-webserver.lua.zip.o \
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