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client_unix.go
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client_unix.go
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//go:build linux || darwin || netbsd || freebsd || openbsd || dragonfly
// +build linux darwin netbsd freebsd openbsd dragonfly
package gnet
import (
"errors"
"log"
"net"
"sync"
"syscall"
"github.com/kolinfluence/gnet/internal/netpoll"
"golang.org/x/sys/unix"
)
type ClientManage struct {
*server
}
func (srv *ClientManage) Dial(network, addr string) (Conn, error) {
if network == "tcp4" {
tcpaddr, err := net.ResolveTCPAddr(network, addr)
if err != nil {
return nil, err
}
nfd, err := unixDialTcp(tcpaddr)
if err != nil {
return nil, err
}
lp := srv.server.subLoopGroup.next()
c := newTCPConn(nfd, lp, nil)
if srv.opts.TCPNoDelay {
if err := unix.SetsockoptInt(nfd, unix.IPPROTO_TCP, unix.TCP_NODELAY, 1); err != nil {
return nil, err
}
}
sa, _ := syscall.Getsockname(nfd)
c.localAddr = &net.TCPAddr{IP: sa.(*syscall.SockaddrInet4).Addr[0:], Port: sa.(*syscall.SockaddrInet4).Port}
c.remoteAddr = tcpaddr
c.isClient = true
_ = lp.srv.mainLoop.poller.Trigger(lp.addread, c)
return c, nil
} else {
}
return nil, nil
}
func unixDialTcp(tcpAddr *net.TCPAddr) (int, error) {
sockfd, err := syscall.Socket(syscall.AF_INET, syscall.SOCK_STREAM, syscall.IPPROTO_TCP)
if err != nil {
return 0, errors.New("创建socket失败 " + err.Error())
}
rsa := &syscall.SockaddrInet4{Addr: [4]byte{tcpAddr.IP[12], tcpAddr.IP[13], tcpAddr.IP[14], tcpAddr.IP[15]}, Port: tcpAddr.Port}
err = syscall.Connect(sockfd, rsa)
return sockfd, err
}
func (lp *eventloop) loopOpenClient(c *conn) error {
c.state = connStateOk
lp.srv.connWg.Add(1)
out, action := lp.eventHandler.OnOpened(c)
if out != nil {
c.write(out)
}
return lp.handleAction(c, action)
}
func client(eventHandler EventHandler, options *Options) *ClientManage {
srv := &server{mainLoop: &eventloop{}}
srv.mainLoop.srv = srv
srv.connWg = new(sync.WaitGroup)
srv.subLoopGroup = new(eventLoopGroup)
srv.eventHandler = eventHandler
srv.opts = options
srv.ln = &listener{fd: -1}
srv.codec = func() ICodec {
if options.Codec == nil {
return new(BuiltInFrameCodec)
}
return options.Codec
}()
if p, err := netpoll.OpenPoller(); err == nil {
el := &eventloop{
idx: 0,
srv: srv,
codec: srv.codec,
poller: p,
packet: make([]byte, 0xFFFF),
eventHandler: srv.eventHandler,
}
srv.mainLoop = el
srv.subLoopGroup.register(el)
srv.startLoops()
} else {
log.Fatalln("无法启动client")
}
return &ClientManage{srv}
}