| #!/bin/sh |
| # |
| # RISCVEMU Ethernet bridge and NAT configuration (run with sudo) |
| # |
| # Copyright (c) 2017 Fabrice Bellard |
| # |
| # Permission is hereby granted, free of charge, to any person obtaining a copy |
| # of this software and associated documentation files (the "Software"), to deal |
| # in the Software without restriction, including without limitation the rights |
| # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| # copies of the Software, and to permit persons to whom the Software is |
| # furnished to do so, subject to the following conditions: |
| # |
| # The above copyright notice and this permission notice shall be included in |
| # all copies or substantial portions of the Software. |
| # |
| # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| # THE SOFTWARE. |
| # |
| |
| # host network interface connected to Internet (change it) |
| internet_ifname="enp0s20f0u1" |
| |
| # setup bridge interface |
| ip link add br0 type bridge |
| # create and add tap0 interface to bridge |
| ip tuntap add dev tap0 mode tap user $USER |
| ip link set tap0 master br0 |
| |
| ip link set dev br0 up |
| ip link set dev tap0 up |
| ifconfig br0 192.168.3.1 |
| |
| # setup NAT to access to Internet |
| echo 1 > /proc/sys/net/ipv4/ip_forward |
| # delete forwarding reject rule if present |
| #iptables -D FORWARD 1 |
| iptables -t nat -A POSTROUTING -o $internet_ifname -j MASQUERADE |