| // Package gateway implements client and server methods that (1) allow a device |
| // to act as an IP gateway and (2) allow devices without an IP connection to |
| // obtain it via a gateway device. |
| // The main gateway functionality is achieved through the Bluetooth BNEP |
| // protocol. This protocol allows a virtual Ethernet connection to be |
| // established between multiple Bluetooth devices. We plugin the remaining |
| // functionality (IP forwarding, DHCP) using standard Linux tools (e.g., |
| // route/dhcpd). The current implementation is therefore platform-specific and |
| // for now only supported on Linux. |
| // For the Bluetooth stack, we use Bluez 4.101 library along with standard |
| // linux Bluetooth drivers. As Bluez libraries go through extensive |
| // non-backward-compatible changes, we require that this exact library version |
| // is installed on target systems. We use DBus to communicate with the Bluez |
| // To configure the IP stack we use a number of standard Linux tools, namely: |
| // awk, grep, cut, route, dhcpcd, and dhcpd. These tools must be installed on |
| // target systems and must be present in system's $PATH environmental variable. |
| // We also rely on IP4 addressing and must revisit the implementation should |
| // IPv6 become the only standard. |
