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package shim0
import (
"fmt"
"net"
"sync"
"syscall"
"git.ophivana.moe/security/fortify/internal/fmsg"
)
// Wayland implements wayland mediation.
type Wayland struct {
// wayland socket path
Path string
// wayland connection
conn *net.UnixConn
connErr error
sync.Once
// wait for wayland client to exit
done chan struct{}
}
func (wl *Wayland) WriteUnix(conn *net.UnixConn) error {
// connect to host wayland socket
if f, err := net.DialUnix("unix", nil, &net.UnixAddr{Name: wl.Path, Net: "unix"}); err != nil {
return fmsg.WrapErrorSuffix(err,
fmt.Sprintf("cannot connect to wayland at %q:", wl.Path))
} else {
fmsg.VPrintf("connected to wayland at %q", wl.Path)
wl.conn = f
}
// set up for passing wayland socket
if rc, err := wl.conn.SyscallConn(); err != nil {
return fmsg.WrapErrorSuffix(err, "cannot obtain raw wayland connection:")
} else {
ec := make(chan error)
go func() {
// pass wayland connection fd
if err = rc.Control(func(fd uintptr) {
if _, _, err = conn.WriteMsgUnix(nil, syscall.UnixRights(int(fd)), nil); err != nil {
ec <- fmsg.WrapErrorSuffix(err, "cannot pass wayland connection to shim:")
return
}
ec <- nil
// block until shim exits
<-wl.done
fmsg.VPrintln("releasing wayland connection")
}); err != nil {
ec <- fmsg.WrapErrorSuffix(err, "cannot obtain wayland connection fd:")
return
}
}()
return <-ec
}
}
func (wl *Wayland) Close() error {
wl.Do(func() {
close(wl.done)
wl.connErr = wl.conn.Close()
})
return wl.connErr
}
func NewWayland() *Wayland {
wl := new(Wayland)
wl.done = make(chan struct{})
return wl
}
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