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