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Merge pull request #73 from ijc25/vsock

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vsudd bugfixes
This commit is contained in:
Justin Cormack 2016-04-08 16:05:36 +01:00
commit 9be06ba517
1 changed files with 25 additions and 11 deletions
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36
alpine/packages/vsudd/main.go
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@ -22,8 +22,8 @@ int bind_sockaddr_vm(int fd, const struct sockaddr_vm *sa_vm) {
int connect_sockaddr_vm(int fd, const struct sockaddr_vm *sa_vm) {
return connect(fd, (const struct sockaddr*)sa_vm, sizeof(*sa_vm));
}
int accept_vm(int fd) {
return accept(fd, 0, 0);
int accept_vm(int fd, struct sockaddr_vm *sa_vm, socklen_t *sa_vm_len) {
return accept4(fd, (struct sockaddr *)sa_vm, sa_vm_len, 0);
}
*/
import "C"
@ -73,7 +73,7 @@ func main() {
sa := C.struct_sockaddr_vm{}
sa.svm_family = AF_VSOCK
sa.svm_port = C.uint(port)
sa.svm_cid = 3
sa.svm_cid = VSOCK_CID_ANY
if ret := C.bind_sockaddr_vm(C.int(accept_fd), &sa); ret != 0 {
log.Fatal(fmt.Sprintf("failed bind vsock connection to %08x.%08x, returned %d", sa.svm_cid, sa.svm_port, ret))
@ -89,20 +89,29 @@ func main() {
connid := 0
for {
var accept_sa C.struct_sockaddr_vm
var accept_sa_len C.socklen_t
connid++
fd, err := C.accept_vm(C.int(accept_fd))
accept_sa_len = C.sizeof_struct_sockaddr_vm
fd, err := C.accept_vm(C.int(accept_fd), &accept_sa, &accept_sa_len)
if err != nil {
log.Fatalln("Error accepting connection", err)
}
go handleOne(connid, int(fd))
go handleOne(connid, int(fd), uint(accept_sa.svm_cid), uint(accept_sa.svm_port))
}
}
func handleOne(connid int, fd int) {
vsock := os.NewFile(uintptr(fd), "vsock connection")
log.Println(connid, "Accepted connection on fd", fd)
func handleOne(connid int, fd int, cid, port uint) {
vsock := os.NewFile(uintptr(fd), fmt.Sprintf("vsock:%d", fd))
log.Printf("%d Accepted connection on fd %d from %08x.%08x", connid, fd, cid, port)
defer syscall.Close(fd)
defer func() {
log.Println(connid, "Closing vsock", vsock)
if err := vsock.Close() ; err != nil {
log.Println(connid, "Error closing", vsock, ":", err)
}
}()
var docker *net.UnixConn
var err error
@ -115,13 +124,18 @@ func handleOne(connid int, fd int) {
}
time.Sleep(50 * time.Millisecond)
}
defer docker.Close()
if err != nil {
// If the forwarding program has broken then close and continue
log.Println(connid, "Failed to connect to Unix domain socket after 10s", sock, err)
return
}
defer func() {
log.Println(connid, "Closing docker", docker)
if err := docker.Close() ; err != nil {
log.Println(connid, "Error closing", docker, ":", err)
}
}()
log.Println(connid, "Connected to docker", docker)
w := make(chan int64)
go func() {