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[lwtunnel bpf] add support for encap BPF#645

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aboch merged 1 commit intovishvananda:masterfrom
bersoare:lwt_encap_bpf
Jul 3, 2021
Merged

[lwtunnel bpf] add support for encap BPF#645
aboch merged 1 commit intovishvananda:masterfrom
bersoare:lwt_encap_bpf

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@bersoare bersoare commented Apr 21, 2021 •
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this patch adds a new type for encap BPF, allowing FD and NAME to be set for programs, as well as the XMIT headroom.
bpf loading not included in this patch, but the bpf program can be loaded using a 3rd party library

example usage:

	fmt.Printf("prog fd: %d\n", prog.GetFd()) // loaded program, exposing its FD (it is pinned in this case)
	encap := netlink.BPFEncap{}
	err = encap.SetProg(nl.LWT_BPF_XMIT, prog.GetFd(), "mytest123")
	if err != nil {
		panic(err)
	}
	err = encap.SetXmitHeadroom(128)
	if err != nil {
		panic(err)
	}
	_, dst, _ := net.ParseCIDR("192.168.123.12/32")
	newRoute := &netlink.Route{Dst: dst, LinkIndex: link.Attrs().Index, Encap: &encap}
	err = handle.RouteAdd(newRoute)
	if err != nil {
		panic(err)
	}

result of the above code:

# ip ro sh | grep mytest
192.168.123.12  encap bpf xmit mytest123[fd:3] dev bareudp0

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bersoare commented May 18, 2021

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@aboch
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aboch commented May 30, 2021

please squash your commits into one

@bersoare
lwtunnel: add support for encap type bpf
17230bf 
add bpf program types

add unit tests

don't use strings to determine type

fix camel case
@aboch aboch merged commit 079db23 into vishvananda:master Jul 3, 2021
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2 participants

@bersoare @aboch