[feat] llgo/c/hyper-related c lib

_demo/netdb/netdb.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgo/c/net"
+)
+
+func main() {
+	var hints net.AddrInfo
+	hints.AiFamily = net.AF_UNSPEC
+	hints.AiSockType = net.SOCK_STREAM
+
+	host := "httpbin.org"
+	port := "80"
+
+	var result *net.AddrInfo
+	c.Printf(c.Str("%d\n"), net.Getaddrinfo(c.Str(host), c.Str(port), &hints, &result))
+
+	c.Printf(c.Str("%d\n"), net.Freeaddrinfo(result))
+}

_demo/select/select.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgo/c/os"
+	"github.com/goplus/llgo/c/sys"
+	"github.com/goplus/llgo/c/syscall"
+	"unsafe"
+)
+
+func main() {
+	var readFds syscall.FdSet
+
+	sys.FD_ZERO(&readFds)
+
+	sys.FD_SET(0, &readFds)
+
+	var tv sys.TimeVal
+	tv.TvSec = 5
+	tv.TvUSec = 0
+
+	c.Printf(c.Str("Waiting for input on stdin...\n"))
+	ret := sys.Select(1, &readFds, nil, nil, &tv)
+	if ret == -1 {
+		c.Perror(c.Str("select error"))
+		c.Exit(1)
+	} else if ret == 0 {
+		c.Printf(c.Str("Timeout occurred! No data after 5 seconds.\n"))
+	} else {
+		if sys.FD_ISSET(0, &readFds) != 0 {
+			var buffer [100]c.Char
+			n := os.Read(0, c.Pointer(&buffer[:][0]), unsafe.Sizeof(buffer)-1)
+			if n == -1 {
+				c.Perror(c.Str("read error"))
+				c.Exit(1)
+			} else if n == 0 {
+				c.Printf(c.Str("End of file\n"))
+			} else {
+				buffer[n] = c.Char(0)
+				c.Printf(c.Str("Read %ld bytes: %s\n"), n, &buffer[0])
+			}
+		}
+	}
+}

_demo/select/select2.go

@@ -0,0 +1,87 @@
+package main
+
+import (
+	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgo/c/net"
+	"github.com/goplus/llgo/c/os"
+	"github.com/goplus/llgo/c/sys"
+	"github.com/goplus/llgo/c/syscall"
+	"unsafe"
+)
+
+const (
+	SERVER_IP   = "110.242.68.66" // Get the IP address by ping baidu.com
+	SERVER_PORT = 80
+	BUFFER_SIZE = 4096 * 1024
+)
+
+func main() {
+	var server net.SockaddrIn
+
+	sendBuf := c.Str("GET / HTTP/1.1\r\nHost: baidu.com\r\n\r\n")
+	var recvBuf [BUFFER_SIZE]c.Char
+	var bytes_sent, bytes_received c.Int
+
+	// create net
+	sock := net.Socket(net.AF_INET, net.SOCK_STREAM, 0)
+	if sock < 0 {
+		c.Perror(c.Str("Socket creation failed"))
+		return
+	}
+
+	// set server addr
+	c.Memset(c.Pointer(&server), 0, unsafe.Sizeof(server))
+	server.Family = net.AF_INET
+	server.Port = net.Htons(SERVER_PORT)
+	server.Addr.Addr = net.InetAddr(c.Str(SERVER_IP))
+
+	// connect to server
+	if net.Connect(sock, (*net.SockAddr)(c.Pointer(&server)), c.Uint(unsafe.Sizeof(server))) < 0 {
+		c.Perror(c.Str("Connect failed"))
+		return
+	}
+
+	var writefds, readfds syscall.FdSet
+	var timeout sys.TimeVal
+
+	//  Monitor socket writes
+	sys.FD_ZERO(&writefds)
+	sys.FD_SET(sock, &writefds)
+	timeout.TvSec = 10
+	timeout.TvUSec = 0
+	// Use select to monitor the readiness of writes
+	if sys.Select(sock+1, nil, &writefds, nil, &timeout) > 0 {
+		if sys.FD_ISSET(sock, &writefds) != 0 {
+			bytes_sent = c.Int(net.Send(sock, c.Pointer(sendBuf), c.Strlen(sendBuf), 0))
+			if bytes_sent < 0 {
+				c.Perror(c.Str("send failed"))
+				return
+			}
+		}
+	} else {
+		c.Perror(c.Str("Select write error"))
+		return
+	}
+
+	// Monitor socket reads
+	sys.FD_ZERO(&readfds)
+	sys.FD_SET(sock, &readfds)
+
+	// Use select to monitor the readiness of the read operation
+	if sys.Select(sock+1, &readfds, nil, nil, &timeout) > 0 {
+		if sys.FD_ISSET(sock, &writefds) != -1 {
+			bytes_received = c.Int(net.Recv(sock, c.Pointer(&recvBuf[:][0]), BUFFER_SIZE-1, 0))
+			if bytes_received < 0 {
+				c.Perror(c.Str("receive failed"))
+				return
+			}
+			recvBuf[bytes_received] = c.Char(0)
+			c.Printf(c.Str("Received:\n%s\n"), &recvBuf[0])
+		}
+	} else {
+		c.Perror(c.Str("Select read error"))
+		return
+	}
+
+	os.Close(sock)
+}

_demo/socket/client/client.go

@@ -4,27 +4,27 @@ import (
 	"unsafe"
 
 	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgo/c/net"
 	"github.com/goplus/llgo/c/os"
-	"github.com/goplus/llgo/c/socket"
 )
 
 func main() {
-	sockfd := socket.Socket(socket.AF_INET, socket.SOCK_STREAM, 0)
+	sockfd := net.Socket(net.AF_INET, net.SOCK_STREAM, 0)
 	msg := c.Str("Hello, World!")
 	defer os.Close(sockfd)
 
-	server := socket.GetHostByName(c.Str("localhost"))
+	server := net.GetHostByName(c.Str("localhost"))
 	if server == nil {
 		c.Perror(c.Str("hostname get error"))
 		return
 	}
 
-	servAddr := &socket.SockaddrIn{}
-	servAddr.Family = socket.AF_INET
-	servAddr.Port = socket.Htons(uint16(1234))
+	servAddr := &net.SockaddrIn{}
+	servAddr.Family = net.AF_INET
+	servAddr.Port = net.Htons(uint16(1234))
 	c.Memcpy(unsafe.Pointer(&servAddr.Addr.Addr), unsafe.Pointer(*server.AddrList), uintptr(server.Length))
 
-	if res := socket.Connect(sockfd, (*socket.SockAddr)(unsafe.Pointer(servAddr)), c.Uint(16)); res < 0 {
+	if res := net.Connect(sockfd, (*net.SockAddr)(unsafe.Pointer(servAddr)), c.Uint(16)); res < 0 {
 		c.Perror(c.Str("connect error"))
 		return
 	}

_demo/socket/server/server.go

@@ -4,36 +4,36 @@ import (
 	"unsafe"
 
 	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgo/c/net"
 	"github.com/goplus/llgo/c/os"
-	"github.com/goplus/llgo/c/socket"
 )
 
 func main() {
 	var buffer [256]c.Char
 
-	sockfd := socket.Socket(socket.AF_INET, socket.SOCK_STREAM, 0)
+	sockfd := net.Socket(net.AF_INET, net.SOCK_STREAM, 0)
 	defer os.Close(sockfd)
 
-	servAddr := &socket.SockaddrIn{
-		Family: socket.AF_INET,
-		Port:   socket.Htons(uint16(1234)),
-		Addr:   socket.InAddr{Addr: 0x00000000},
+	servAddr := &net.SockaddrIn{
+		Family: net.AF_INET,
+		Port:   net.Htons(uint16(1234)),
+		Addr:   net.InAddr{Addr: 0x00000000},
 		Zero:   [8]c.Char{0, 0, 0, 0, 0, 0, 0, 0},
 	}
-	if res := socket.Bind(sockfd, servAddr, c.Uint(unsafe.Sizeof(*servAddr))); res < 0 {
+	if res := net.Bind(sockfd, servAddr, c.Uint(unsafe.Sizeof(*servAddr))); res < 0 {
 		c.Perror(c.Str("bind error"))
 		return
 	}
 
-	if socket.Listen(sockfd, 5) < 0 {
+	if net.Listen(sockfd, 5) < 0 {
 		c.Printf(c.Str("listen error"))
 		return
 	}
 	c.Printf(c.Str("Listening on port 1234...\n"))
 
-	cliAddr, clilen := &socket.SockaddrIn{}, c.Uint(unsafe.Sizeof(servAddr))
+	cliAddr, clilen := &net.SockaddrIn{}, c.Uint(unsafe.Sizeof(servAddr))
 
-	newsockfd := socket.Accept(sockfd, cliAddr, &clilen)
+	newsockfd := net.Accept(sockfd, cliAddr, &clilen)
 	defer os.Close(newsockfd)
 	c.Printf(c.Str("Connection accepted."))
 

c/socket/socket.go → c/net/net.go

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package socket
+package net
 
 import (
 	_ "unsafe"
@@ -101,7 +101,6 @@ type SockAddr struct {
 	Data   [14]c.Char
 }
 
-// (TODO) merge to netdb
 type Hostent struct {
 	Name     *c.Char  // official name of host
 	Aliases  **c.Char // null-terminated array of alternate names for the host
@@ -110,6 +109,17 @@ type Hostent struct {
 	AddrList **c.Char // null-terminated array of addresses for the host
 }
 
+type AddrInfo struct {
+	AiFlags     c.Int
+	AiFamily    c.Int
+	AiSockType  c.Int
+	AiProtocol  c.Int
+	AiAddrLen   c.Uint
+	AiCanOnName *c.Char
+	AiAddr      *SockAddr
+	AiNext      *AddrInfo
+}
+
 //go:linkname Socket C.socket
 func Socket(domain c.Int, typ c.Int, protocol c.Int) c.Int
 
@@ -125,8 +135,6 @@ func Listen(sockfd c.Int, backlog c.Int) c.Int
 //go:linkname Accept C.accept
 func Accept(sockfd c.Int, addr *SockaddrIn, addrlen *c.Uint) c.Int
 
-// (TODO) merge to netdb
-//
 //go:linkname GetHostByName C.gethostbyname
 func GetHostByName(name *c.Char) *Hostent
 
@@ -142,3 +150,18 @@ func SwapInt16(data uint16) uint16 {
 func Htons(x uint16) uint16 {
 	return SwapInt16(x)
 }
+
+//go:linkname InetAddr C.inet_addr
+func InetAddr(s *c.Char) c.Uint
+
+//go:linkname Send C.send
+func Send(c.Int, c.Pointer, uintptr, c.Int) c.Long
+
+//go:linkname Recv C.recv
+func Recv(c.Int, c.Pointer, uintptr, c.Int) c.Long
+
+//go:linkname Getaddrinfo C.getaddrinfo
+func Getaddrinfo(host *c.Char, port *c.Char, addrInfo *AddrInfo, result **AddrInfo) c.Int
+
+//go:linkname Freeaddrinfo C.freeaddrinfo
+func Freeaddrinfo(addrInfo *AddrInfo) c.Int

c/os/os.go

@@ -58,6 +58,10 @@ const (
 	O_TRUNC = 0x00000400
 )
 
+const (
+	EAGAIN = 35
+)
+
 type (
 	ModeT C.mode_t
 	UidT  C.uid_t

c/sys/_wrap/fddef.c

@@ -0,0 +1,13 @@
+#include <sys/types.h>
+
+int fd_isset(int n, fd_set *fd) {
+    return FD_ISSET(n, fd);
+}
+
+void fdSet(int n, fd_set *fd) {
+    FD_SET(n, fd);
+}
+
+void fd_zero(fd_set *fd) {
+    FD_ZERO(fd);
+}

c/sys/select.go

@@ -0,0 +1,31 @@
+package sys
+
+import (
+	"github.com/goplus/llgo/c/syscall"
+	_ "unsafe"
+
+	"github.com/goplus/llgo/c"
+)
+
+const (
+	LLGoFiles   = "_wrap/fddef.c"
+	LLGoPackage = "link"
+)
+
+// (TODO) merge to timeval
+type TimeVal struct {
+	TvSec  c.Long
+	TvUSec c.Int
+}
+
+//go:linkname FD_ZERO C.fd_zero
+func FD_ZERO(fdSet *syscall.FdSet)
+
+//go:linkname FD_SET C.fdSet
+func FD_SET(fd c.Int, fdSet *syscall.FdSet)
+
+//go:linkname FD_ISSET C.fd_isset
+func FD_ISSET(fd c.Int, fdSet *syscall.FdSet) c.Int
+
+//go:linkname Select C.select
+func Select(n c.Int, r *syscall.FdSet, w *syscall.FdSet, e *syscall.FdSet, timeout *TimeVal) c.Int