func doNetworkGet(d *Daemon, name string) (shared.NetworkConfig, error) {
// Get some information
osInfo, _ := net.InterfaceByName(name)
_, dbInfo, _ := dbNetworkGet(d.db, name)
// Sanity check
if osInfo == nil && dbInfo == nil {
return shared.NetworkConfig{}, os.ErrNotExist
}
// Prepare the response
n := shared.NetworkConfig{}
n.Name = name
n.UsedBy = []string{}
n.Config = map[string]string{}
// Look for containers using the interface
cts, err := dbContainersList(d.db, cTypeRegular)
if err != nil {
return shared.NetworkConfig{}, err
}
for _, ct := range cts {
c, err := containerLoadByName(d, ct)
if err != nil {
return shared.NetworkConfig{}, err
}
if networkIsInUse(c, n.Name) {
n.UsedBy = append(n.UsedBy, fmt.Sprintf("/%s/containers/%s", shared.APIVersion, ct))
}
}
// Set the device type as needed
if osInfo != nil && shared.IsLoopback(osInfo) {
n.Type = "loopback"
} else if dbInfo != nil || shared.PathExists(fmt.Sprintf("/sys/class/net/%s/bridge", n.Name)) {
if dbInfo != nil {
n.Managed = true
n.Config = dbInfo.Config
}
n.Type = "bridge"
} else if shared.PathExists(fmt.Sprintf("/sys/class/net/%s/device", n.Name)) {
n.Type = "physical"
} else if shared.PathExists(fmt.Sprintf("/sys/class/net/%s/bonding", n.Name)) {
n.Type = "bond"
} else {
_, err := exec.Command("ovs-vsctl", "br-exists", n.Name).CombinedOutput()
if err == nil {
n.Type = "bridge"
} else {
n.Type = "unknown"
}
}
return n, nil
}
func networkPatch(d *Daemon, r *http.Request) Response {
name := mux.Vars(r)["name"]
// Get the existing network
_, dbInfo, err := dbNetworkGet(d.db, name)
if dbInfo != nil {
return SmartError(err)
}
// Validate the ETag
etag := []interface{}{dbInfo.Name, dbInfo.Managed, dbInfo.Type, dbInfo.Config}
err = etagCheck(r, etag)
if err != nil {
return PreconditionFailed(err)
}
req := shared.NetworkConfig{}
if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
return BadRequest(err)
}
// Config stacking
if req.Config == nil {
req.Config = map[string]string{}
}
for k, v := range dbInfo.Config {
_, ok := req.Config[k]
if !ok {
req.Config[k] = v
}
}
return doNetworkUpdate(d, name, dbInfo.Config, req.Config)
}
func networksPost(d *Daemon, r *http.Request) Response {
req := shared.NetworkConfig{}
// Parse the request
err := json.NewDecoder(r.Body).Decode(&req)
if err != nil {
return BadRequest(err)
}
// Sanity checks
if req.Name == "" {
return BadRequest(fmt.Errorf("No name provided"))
}
err = networkValidName(req.Name)
if err != nil {
return BadRequest(err)
}
if req.Type != "" && req.Type != "bridge" {
return BadRequest(fmt.Errorf("Only 'bridge' type networks can be created"))
}
networks, err := networkGetInterfaces(d)
if err != nil {
return InternalError(err)
}
if shared.StringInSlice(req.Name, networks) {
return BadRequest(fmt.Errorf("The network already exists"))
}
if req.Config == nil {
req.Config = map[string]string{}
}
err = networkValidateConfig(req.Name, req.Config)
if err != nil {
return BadRequest(err)
}
// Set some default values where needed
if req.Config["bridge.mode"] == "fan" {
if req.Config["fan.underlay_subnet"] == "" {
req.Config["fan.underlay_subnet"] = "auto"
}
} else {
if req.Config["ipv4.address"] == "" {
req.Config["ipv4.address"] = "auto"
}
if req.Config["ipv4.address"] == "auto" && req.Config["ipv4.nat"] == "" {
req.Config["ipv4.nat"] = "true"
}
if req.Config["ipv6.address"] == "" {
content, err := ioutil.ReadFile("/proc/sys/net/ipv6/conf/default/disable_ipv6")
if err == nil && string(content) == "0\n" {
req.Config["ipv6.address"] = "auto"
}
}
if req.Config["ipv6.address"] == "auto" && req.Config["ipv6.nat"] == "" {
req.Config["ipv6.nat"] = "true"
}
}
// Replace "auto" by actual values
err = networkFillAuto(req.Config)
if err != nil {
return InternalError(err)
}
// Create the database entry
_, err = dbNetworkCreate(d.db, req.Name, req.Config)
if err != nil {
return InternalError(
fmt.Errorf("Error inserting %s into database: %s", req.Name, err))
}
// Start the network
n, err := networkLoadByName(d, req.Name)
if err != nil {
return InternalError(err)
}
err = n.Start()
if err != nil {
n.Delete()
return InternalError(err)
}
return SyncResponseLocation(true, nil, fmt.Sprintf("/%s/networks/%s", shared.APIVersion, req.Name))
}