-
Notifications
You must be signed in to change notification settings - Fork 232
[draft] feat(usbgadget): share JetKVM's internet via USB ethernet #459
New issue
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.
Already on GitHub? Sign in to your account
Draft
dlorch
wants to merge
7
commits into
jetkvm:dev
Choose a base branch
from
dlorch:feat/share-internet-usb
base: dev
Could not load branches
Branch not found: {{ refName }}
Loading
Could not load tags
Nothing to show
Loading
Are you sure you want to change the base?
Some commits from the old base branch may be removed from the timeline,
and old review comments may become outdated.
Draft
Changes from all commits
Commits
Show all changes
7 commits
Select commit
Hold shift + click to select a range
9b75613
add USB gadget ethernet configurations
dlorch efde7dc
Remove logging statemets
dlorch a467793
Improve interface state log message
dlorch b512e4d
Enable Ipv4 forwarding
dlorch 0317ccc
Make USB network settings configurable
dlorch 9176655
Initialize USB ethernet
dlorch ecef1ea
Fix error messages
dlorch File filter
Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
There are no files selected for viewing
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| package network | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "os" | ||
| "os/exec" | ||
| ) | ||
|
|
||
| const ( | ||
| procIpv4ForwardPath = "/proc/sys/net/ipv4/ip_forward" | ||
| ) | ||
|
|
||
| func (s *NetworkInterfaceState) UsbNetworkConfig() *UsbNetworkConfig { | ||
| return s.usbNetConfig | ||
| } | ||
|
|
||
| func (s *NetworkInterfaceState) reconfigureNat(wantNat bool, sourceAddr string) error { | ||
| scopedLogger := s.l.With().Str("iface", s.interfaceName).Logger() | ||
|
|
||
| if !wantNat { | ||
| if s.natEnabled { | ||
| scopedLogger.Info().Msg("disabling NAT") | ||
| err := disableNat() | ||
| if err != nil { | ||
| s.l.Error().Err(err).Msg("failed to disable NAT") | ||
dlorch marked this conversation as resolved.
Show resolved
Hide resolved
|
||
| } | ||
dlorch marked this conversation as resolved.
Show resolved
Hide resolved
|
||
| } | ||
| return nil | ||
| } | ||
|
|
||
| if wantNat && s.IsOnline() { | ||
| scopedLogger.Info().Msg("enabling NAT") | ||
| err := enableNat(sourceAddr, s.interfaceName, s.IPv4String()) | ||
| if err != nil { | ||
| s.l.Error().Err(err).Msg("failed to enable NAT") | ||
dlorch marked this conversation as resolved.
Show resolved
Hide resolved
|
||
| } | ||
dlorch marked this conversation as resolved.
Show resolved
Hide resolved
|
||
| s.natEnabled = true | ||
| return nil | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func enableNat(sourceAddr string, oIfName string, snatToAddr string) error { | ||
| if err := os.WriteFile(procIpv4ForwardPath, []byte("1"), 0644); err != nil { | ||
| return fmt.Errorf("failed to write %s: %w", procIpv4ForwardPath, err) | ||
| } | ||
|
|
||
| if err := exec.Command("nft", "add table nat").Run(); err != nil { | ||
| return fmt.Errorf("failed to add table nat: %w", err) | ||
| } | ||
|
|
||
| if err := exec.Command("nft", "flush table nat").Run(); err != nil { | ||
| return fmt.Errorf("failed to flush table nat: %w", err) | ||
| } | ||
|
|
||
| if err := exec.Command("nft", "add chain nat postrouting { type nat hook postrouting priority 100 ; }").Run(); err != nil { | ||
| return fmt.Errorf("failed to add chain nat: %w", err) | ||
| } | ||
|
|
||
| if err := exec.Command("nft", "add rule nat postrouting ip saddr", sourceAddr, "oif", oIfName, "snat to", snatToAddr).Run(); err != nil { | ||
| return fmt.Errorf("failed to add postrouting rule: %w", err) | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func disableNat() error { | ||
| if err := os.WriteFile(procIpv4ForwardPath, []byte("0"), 0644); err != nil { | ||
| return fmt.Errorf("failed to write %s: %w", procIpv4ForwardPath, err) | ||
| } | ||
|
|
||
| if err := exec.Command("nft", "delete table nat").Run(); err != nil { | ||
| return fmt.Errorf("failed to run nft: %w", err) | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| package usbgadget | ||
|
|
||
| const ( | ||
| usbEthernetDevice = "usb0" | ||
| ) | ||
|
|
||
| // Ethernet Control Model (ECM) | ||
| var ethernetEcmConfig = gadgetConfigItem{ | ||
| order: 4000, | ||
| path: []string{"functions", "ecm.usb0"}, | ||
| configPath: []string{"ecm.usb0"}, | ||
| attrs: gadgetAttributes{ | ||
| "host_addr": "", // MAC address of target host (randomly select) | ||
| "dev_addr": "", // MAC address of JetKVM (randomly select) | ||
| }, | ||
| } | ||
|
|
||
| // Ethernet Emulation Model (EEM) | ||
| var ethernetEemConfig = gadgetConfigItem{ | ||
| order: 4001, | ||
| path: []string{"functions", "eem.usb0"}, | ||
| configPath: []string{"eem.usb0"}, | ||
| attrs: gadgetAttributes{ | ||
| "host_addr": "", // MAC address of target host (randomly select) | ||
| "dev_addr": "", // MAC address of JetKVM (randomly select) | ||
| }, | ||
| } | ||
|
|
||
| // Network Control Model (NCM) | ||
| var ethernetNcmConfig = gadgetConfigItem{ | ||
| order: 4001, | ||
| path: []string{"functions", "ncm.usb0"}, | ||
| configPath: []string{"ncm.usb0"}, | ||
| attrs: gadgetAttributes{ | ||
| "host_addr": "", // MAC address of target host (randomly select) | ||
| "dev_addr": "", // MAC address of JetKVM (randomly select) | ||
| }, | ||
| } | ||
|
|
||
| // Remote Network Driver Interface Specification (RNDIS) | ||
| var ethernetRndisConfig = gadgetConfigItem{ | ||
| order: 4001, | ||
| path: []string{"functions", "rndis.usb0"}, | ||
| configPath: []string{"rndis.usb0"}, | ||
| attrs: gadgetAttributes{ | ||
| "host_addr": "", // MAC address of target host (randomly select) | ||
| "dev_addr": "", // MAC address of JetKVM (randomly select) | ||
| }, | ||
| } | ||
|
|
||
| func (u *UsbGadget) UsbEthernetEnabled() bool { | ||
| return u.isGadgetConfigItemEnabled("ecm") || | ||
| u.isGadgetConfigItemEnabled("eem") || | ||
| u.isGadgetConfigItemEnabled("ncm") || | ||
| u.isGadgetConfigItemEnabled("rndis") | ||
| } | ||
|
|
||
| func (u *UsbGadget) UsbEthernetDevice() string { | ||
| return usbEthernetDevice | ||
| } |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Uh oh!
There was an error while loading. Please reload this page.