cwinfo/yggdrasil-go
5
0
Fork 0
mirror of https://github.com/cwinfo/yggdrasil-go.git synced 2024-11-22 18:50:27 +00:00
Code Releases Activity

Merge pull request #163 from neilalexander/tapmtu

Browse Source 
Cap MTU on Linux in TAP mode
This commit is contained in:
Arceliar 2018-07-19 18:25:03 -05:00 committed by GitHub
commit 549d6f9dd2
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 16 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
src/yggdrasil/tun_linux.go
View File

@ -29,6 +29,18 @@ func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int)
}
tun.iface = iface
tun.mtu = getSupportedMTU(mtu)
// The following check is specific to Linux, as the TAP driver only supports
// an MTU of 65535-14 to make room for the ethernet headers. This makes sure
// that the MTU gets rounded down to 65521 instead of causing a panic.
if iftapmode {
if tun.mtu > 65535-tun_ETHER_HEADER_LENGTH {
tun.mtu = 65535-tun_ETHER_HEADER_LENGTH
}
}
// Friendly output
tun.core.log.Printf("Interface name: %s", tun.iface.Name())
tun.core.log.Printf("Interface IPv6: %s", addr)
tun.core.log.Printf("Interface MTU: %d", tun.mtu)
return tun.setupAddress(addr)
}

4
src/yggdrasil/tun_windows.go
View File

@ -57,6 +57,10 @@ func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int)
if err != nil {
panic(err)
}
// Friendly output
tun.core.log.Printf("Interface name: %s", tun.iface.Name())
tun.core.log.Printf("Interface IPv6: %s", addr)
tun.core.log.Printf("Interface MTU: %d", tun.mtu)
return tun.setupAddress(addr)
}