bbonev / eoip Goto Github PK

I write these commands:
1.make
2.cc -Wall -Os -c libnetlink.c
3.cc -Wall -Os -o eoip eoipcr.c libnetlink.o
4.strip eoip
5.cd out-of-tree-6.1.x/
6. make
At stage 6, it shows an error:

This happens on debian 12.

Got this error below while compiling.
my system is Ubuntu 18.04.5 LTS

dafi@fujitsu:~/linux-source-4.15.0/eoip/out-of-tree-4.15.x$ make
make[1]: Entering directory '/usr/src/linux-headers-4.15.0-65-generic'
CC [M] /home/dafi/linux-source-4.15.0/eoip/out-of-tree-4.15.x/eoip.o
/home/dafi/linux-source-4.15.0/eoip/out-of-tree-4.15.x/eoip.c: In function ‘eoip_if_xmit’:
/home/dafi/linux-source-4.15.0/eoip/out-of-tree-4.15.x/eoip.c:485:3: error: too many arguments to function skb_dst((const struct sk_buff *)skb)->ops->update_pmtu’
skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu, true);
^~~~~~~
scripts/Makefile.build:337: recipe for target '/home/dafi/linux-source-4.15.0/eoip/out-of-tree-4.15.x/eoip.o' failed
make[2]: *** [/home/dafi/linux-source-4.15.0/eoip/out-of-tree-4.15.x/eoip.o] Error 1
Makefile:1571: recipe for target 'module/home/dafi/linux-source-4.15.0/eoip/out-of-tree-4.15.x' failed
make[1]: *** [module/home/dafi/linux-source-4.15.0/eoip/out-of-tree-4.15.x] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-4.15.0-65-generic'
Makefile:11: recipe for target 'default' failed
make: *** [default] Error 2

Version: Linux server.com 5.4.188-1.el7.elrepo.x86_64 #1 SMP Mon Mar 28 09:10:07 EDT 2022 x86_64 x86_64 x86_64 GNU/Linux

gcc:
Target: x86_64-redhat-linux Configured with: ../configure --enable-bootstrap --enable-languages=c,c++,fortran,lto --prefix=/opt/rh/devtoolset-9/root/usr --mandir=/opt/rh/devtoolset-9/root/usr/share/man --infodir=/opt/rh/devtoolset-9/root/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared --enable-threads=posix --enable-checking=release --enable-multilib --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-gcc-major-version-only --with-linker-hash-style=gnu --with-default-libstdcxx-abi=gcc4-compatible --enable-plugin --enable-initfini-array --with-isl=/builddir/build/BUILD/gcc-9.3.1-20200408/obj-x86_64-redhat-linux/isl-install --disable-libmpx --enable-gnu-indirect-function --with-tune=generic --with-arch_32=x86-64 --build=x86_64-redhat-linux Thread model: posix gcc version 9.3.1 20200408 (Red Hat 9.3.1-2) (GCC)

Problem:
When I start building eoipcr an error is occured

[root@server eoip]# make CC eoipcr.o In file included from eoipcr.c:7: /usr/include/linux/if_tunnel.h:42:16: error: field ‘iph’ has incomplete type 42 | struct iphdr iph; | ^~~ make: *** [eoipcr.o] Error 1
How to fix:
Add include ip.h before if_tunnel.h
#include <linux/ip.h>
#include <linux/if_tunnel.h>

Is it a problem in my version if_tunnel.h that is lack of include if ip.h or wrong include in eoipcr.c?
Maybe it is better to add including ip.h or write additional section in readme section with known issues&

Good day!
Please tell me how can I send a packet larger than 1500 through the eoip with parameter do-not-fragmet ?
With mtu 1500 and less all work great.

root@OpenWrt:/tmp/eoip# lsmod | grep eoip
eoip 7985 0
gre 2884 1 eoip

[ 388.224454] gre: GRE over IPv4 demultiplexor driver
[ 392.064801] EoIP (IPv4) tunneling driver

root@OpenWrt:/tmp/eoip# ip add | grep br10
6: eth3@dsa: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1600 qdisc noqueue master br10 state UP qlen 1000
9: br10: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1600 qdisc noqueue state UP qlen 1000
10: eoip0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master br10 state UNKNOWN qlen 1000

root@OpenWrt:/tmp/eoip# ifconfig eoip0 mtu 1600
ifconfig: SIOCSIFMTU: Invalid argument

[ 791.378925] eoip0: mtu greater than device maximum

If I try to change the mtu of the tunnel, it gives an error

Hostname OpenWrt
Model Ubiquiti EdgeRouter X
Architecture MediaTek MT7621 ver:1 eco:3
Target Platform ramips/mt7621
Firmware Version OpenWrt SNAPSHOT r22549-9cbc83726e / LuCI Master git-23.093.56957-2145121
Kernel Version 5.15.106

This is probably coming from removing #include <netinet/in.h> in 6430c84

Adding #include <stdint.h> to libnetlink.c fixes the issue.

user@localhost:~/eoip$ make
CC libnetlink.o
libnetlink.c: In function ‘rtnl_talk’:
libnetlink.c:348:26: error: ‘uint32_t’ undeclared (first use in this function)
    if (nladdr.nl_pid != (uint32_t)peer ||`
...

Linux build novice here (just to be clear)...

uname -r:

4.19.0-16-amd64

followed procedure:

apt install build-essential
apt install linux-headers-amd64
git clone https://github.com/bbonev/eoip.git
cd eoip/out-of-tree-4.19.x/
make
make install

make result:

patching file eoip.c
using 4.19.0 version of gre_demux.c
using 4.19.0 version of gre.h
patching file gre.h
Hunk #1 succeeded at 24 (offset 15 lines).
patching file gre_demux.c
Hunk #1 succeeded at 31 (offset 1 line).
Hunk #3 succeeded at 155 (offset -129 lines).
Hunk #4 succeeded at 191 (offset -129 lines).
make[1]: Entering directory '/usr/src/linux-headers-4.19.0-16-amd64'
  CC [M]  /root/eoip/out-of-tree-4.19.x/eoip.o
  CC [M]  /root/eoip/out-of-tree-4.19.x/gre.o
  Building modules, stage 2.
  MODPOST 2 modules
  CC      /root/eoip/out-of-tree-4.19.x/eoip.mod.o
  LD [M]  /root/eoip/out-of-tree-4.19.x/eoip.ko
  CC      /root/eoip/out-of-tree-4.19.x/gre.mod.o
  LD [M]  /root/eoip/out-of-tree-4.19.x/gre.ko
make[1]: Leaving directory '/usr/src/linux-headers-4.19.0-16-amd64'

make install result:

make[1]: Entering directory '/usr/src/linux-headers-4.19.0-16-amd64'
  INSTALL /root/eoip/out-of-tree-4.19.x/eoip.ko
  INSTALL /root/eoip/out-of-tree-4.19.x/gre.ko
  DEPMOD  4.19.0-16-amd64
Warning: modules_install: missing 'System.map' file. Skipping depmod.
make[1]: Leaving directory '/usr/src/linux-headers-4.19.0-16-amd64'

thank you in advance!

how to coennect using IPSEC Secret

A interface é listada mas não se comunica.

file kernel-4.15.0-eoip-gre-demux.patch
reports "file to patch: "
tried on kernels 4.15.175, 4.19.237. Ubuntu 18.04.6

planned for the kernel version 3.8?

Hi,

I think that your project may fit into Vyos.net project to improve interoperability
Take a look to the project if you can.

Any chance to have a release for 3.10 and > kernel ?

Thanks for merging my PR.

I noticed you remove cat from the lines.

Just a heads up, without piping lsmod like this
loaded=$(lsmod | grep '^gre ' | cat)
the script will cease executing without an error message.

This is because bash is invoked with #!/bin/bash -e which will exit on error. As the output of the command is captured into a variable, nothing is shown in the output of the script.

On Mikrotik you can clear Do not Fragment flag with a mangle rule, https://wiki.mikrotik.com/wiki/Manual:IP/Firewall/Mangle , clear-df - clear 'Do Not Fragment' Flag . OpenBSD also has support for this in it's implementation of EOIP.

Can you remove DF flag on traffic going through the EOIP tunnel?

Hi,
I install a ubuntu 18.04 under VMWare and upgrade kernel to 4.19.128-0419128, then I try to make eoip connection between my VPS and another RouterOS in VMWare, I use the command "eoip add name testeoip local 192.168.17.12 remote 192.168.17.13 tunnel-id 6" on my ubuntu, and I got the response :
RTNETLINK answers: Operation not permitted
failed to talk to netlink!`
Does I need install some support libraries on my VPS or change any settings to make it working? Please help, Thank you very much!

Hello,
are there any chances of this getting merged into the mainline kernel?

To make sysops' work easier, DKMS package would make kernel updates smoother because it would build the module automatically during kernel update (until we get this patch to mainline Linux).

https://en.wikipedia.org/wiki/Dynamic_Kernel_Module_Support

# dkms status
eoip, 1.1, 5.14.21-150400.24.97-default, x86_64: installed
# modprobe eoip
modprobe: ERROR: could not insert 'eoip': Invalid argument
# dmesg | grep -i eoip
--snip--
[93971.853997] EoIP (IPv4) tunneling driver
[93971.854004] eoip init: can't add protocol

I'm able to build and install the latest commit using DKMS on a Raspberry Pi 4 B running Raspbian 11 kernel 6.1.21-v7l+

Any help is appreciated.

I'm not well versed in all these matters, but I want to transfer EoIP from Mikrotik to Debian 11 and 12.
Can you write the instructions in more detail?
What should I do on a newly installed Debian 11?
Kernel 5.10.0-26-amd64

I have a Debian host that I want to connect over EOIP to multiple Mikrotik Routers. I've cloned the repository, and did an out of tree build to build the modules. I followed the example listed in the readme and can succesfully get EOIP working. I'm however not sure if I did it right as it does not persist a reboot or am unable to figure out how to define these EOIP tunnels in a configuration file. My Debian OS version:

root@:/# cat /etc/debian_version
10.11
root@:/# uname -r
4.19.0-18-amd64
root@:/#

What I did?

root@:/# git clone https://github.com/bbonev/eoip.git
root@:/# cd eoip/
root@:/#  make
root@:/# cd out-of-tree-4.19.x/
root@:/# make
root@:/# insmod ./gre.ko
root@:/# insmod ./eoip.ko

From that point I can add EOIP interfaces and bring them up, however I cannot figure out what I should do best to run this at boot? Eventually I want to add multiple EOIP tunnels to a bridge that also has some VLANs to give out an IP from that VLAN and communicatie with other hosts. My POC is working, I just cannot figure out how to do this at boot and persist.

Anyone that can help me in the right direction what I might be doing wrong? At this point I'm even unsure if I patched the kernel even.

Looks like we need to have

diff --git i/net/ipv4/eoip.c w/net/ipv4/eoip.c
index 50bc7b466e9e..ba7c386a18b9 100644
--- i/net/ipv4/eoip.c
+++ w/net/ipv4/eoip.c
@@ -344,7 +344,7 @@ static int eoip_rcv(struct sk_buff *skb)
                skb->protocol = ARPHRD_ETHER;
 
                skb->mac_header = skb->network_header;
-               __pskb_pull(skb, offset);
+               pskb_pull(skb, offset);
                skb_postpull_rcsum(skb, skb_transport_header(skb), offset);
                skb->pkt_type = PACKET_HOST;
 #ifdef CONFIG_NET_IPGRE_BROADCAST

for 6.1 to work correctly, or we get net/ipv4/eoip.c:347:17: error: implicit declaration of function ‘__pskb_pull’; did you mean ‘__skb_pull’? [-Werror=implicit-function-declaration]

Hi,

Are there any plans to implement support for Kernel 5.15.x?

There is no IPv6 support for tunnel end points. It occurs an error "invalid ip address" if you use IPv6 addresses for local and remote ip address. Thus, not compatible with Mikrotik IPv6 EOIP. Please extend support.

Suppose I have to build network as in the pictures.
Do I have to bridge eoip interface to internal LAN interface

Could you provide a working example network?

Best Regards