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author | Valentin Rothberg <rothberg@redhat.com> | 2019-01-08 14:52:57 +0100 |
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committer | Valentin Rothberg <rothberg@redhat.com> | 2019-01-11 13:38:11 +0100 |
commit | bd40dcfc2bc7c9014ea1f33482fb63aacbcdfe87 (patch) | |
tree | 5f06e4e289f16d9164d692590a3fe6541b5384cf /vendor/github.com/vishvananda/netlink/fou_linux.go | |
parent | 545f24421247c9f6251a634764db3f8f8070a812 (diff) | |
download | podman-bd40dcfc2bc7c9014ea1f33482fb63aacbcdfe87.tar.gz podman-bd40dcfc2bc7c9014ea1f33482fb63aacbcdfe87.tar.bz2 podman-bd40dcfc2bc7c9014ea1f33482fb63aacbcdfe87.zip |
vendor: update everything
* If possible, update each dependency to the latest available version.
* Use releases over commit IDs and avoid vendoring branches.
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Diffstat (limited to 'vendor/github.com/vishvananda/netlink/fou_linux.go')
-rw-r--r-- | vendor/github.com/vishvananda/netlink/fou_linux.go | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/vendor/github.com/vishvananda/netlink/fou_linux.go b/vendor/github.com/vishvananda/netlink/fou_linux.go new file mode 100644 index 000000000..62d59bd2d --- /dev/null +++ b/vendor/github.com/vishvananda/netlink/fou_linux.go @@ -0,0 +1,215 @@ +// +build linux + +package netlink + +import ( + "encoding/binary" + "errors" + + "github.com/vishvananda/netlink/nl" + "golang.org/x/sys/unix" +) + +const ( + FOU_GENL_NAME = "fou" +) + +const ( + FOU_CMD_UNSPEC uint8 = iota + FOU_CMD_ADD + FOU_CMD_DEL + FOU_CMD_GET + FOU_CMD_MAX = FOU_CMD_GET +) + +const ( + FOU_ATTR_UNSPEC = iota + FOU_ATTR_PORT + FOU_ATTR_AF + FOU_ATTR_IPPROTO + FOU_ATTR_TYPE + FOU_ATTR_REMCSUM_NOPARTIAL + FOU_ATTR_MAX = FOU_ATTR_REMCSUM_NOPARTIAL +) + +const ( + FOU_ENCAP_UNSPEC = iota + FOU_ENCAP_DIRECT + FOU_ENCAP_GUE + FOU_ENCAP_MAX = FOU_ENCAP_GUE +) + +var fouFamilyId int + +func FouFamilyId() (int, error) { + if fouFamilyId != 0 { + return fouFamilyId, nil + } + + fam, err := GenlFamilyGet(FOU_GENL_NAME) + if err != nil { + return -1, err + } + + fouFamilyId = int(fam.ID) + return fouFamilyId, nil +} + +func FouAdd(f Fou) error { + return pkgHandle.FouAdd(f) +} + +func (h *Handle) FouAdd(f Fou) error { + fam_id, err := FouFamilyId() + if err != nil { + return err + } + + // setting ip protocol conflicts with encapsulation type GUE + if f.EncapType == FOU_ENCAP_GUE && f.Protocol != 0 { + return errors.New("GUE encapsulation doesn't specify an IP protocol") + } + + req := h.newNetlinkRequest(fam_id, unix.NLM_F_ACK) + + // int to byte for port + bp := make([]byte, 2) + binary.BigEndian.PutUint16(bp[0:2], uint16(f.Port)) + + attrs := []*nl.RtAttr{ + nl.NewRtAttr(FOU_ATTR_PORT, bp), + nl.NewRtAttr(FOU_ATTR_TYPE, []byte{uint8(f.EncapType)}), + nl.NewRtAttr(FOU_ATTR_AF, []byte{uint8(f.Family)}), + nl.NewRtAttr(FOU_ATTR_IPPROTO, []byte{uint8(f.Protocol)}), + } + raw := []byte{FOU_CMD_ADD, 1, 0, 0} + for _, a := range attrs { + raw = append(raw, a.Serialize()...) + } + + req.AddRawData(raw) + + _, err = req.Execute(unix.NETLINK_GENERIC, 0) + if err != nil { + return err + } + + return nil +} + +func FouDel(f Fou) error { + return pkgHandle.FouDel(f) +} + +func (h *Handle) FouDel(f Fou) error { + fam_id, err := FouFamilyId() + if err != nil { + return err + } + + req := h.newNetlinkRequest(fam_id, unix.NLM_F_ACK) + + // int to byte for port + bp := make([]byte, 2) + binary.BigEndian.PutUint16(bp[0:2], uint16(f.Port)) + + attrs := []*nl.RtAttr{ + nl.NewRtAttr(FOU_ATTR_PORT, bp), + nl.NewRtAttr(FOU_ATTR_AF, []byte{uint8(f.Family)}), + } + raw := []byte{FOU_CMD_DEL, 1, 0, 0} + for _, a := range attrs { + raw = append(raw, a.Serialize()...) + } + + req.AddRawData(raw) + + _, err = req.Execute(unix.NETLINK_GENERIC, 0) + if err != nil { + return err + } + + return nil +} + +func FouList(fam int) ([]Fou, error) { + return pkgHandle.FouList(fam) +} + +func (h *Handle) FouList(fam int) ([]Fou, error) { + fam_id, err := FouFamilyId() + if err != nil { + return nil, err + } + + req := h.newNetlinkRequest(fam_id, unix.NLM_F_DUMP) + + attrs := []*nl.RtAttr{ + nl.NewRtAttr(FOU_ATTR_AF, []byte{uint8(fam)}), + } + raw := []byte{FOU_CMD_GET, 1, 0, 0} + for _, a := range attrs { + raw = append(raw, a.Serialize()...) + } + + req.AddRawData(raw) + + msgs, err := req.Execute(unix.NETLINK_GENERIC, 0) + if err != nil { + return nil, err + } + + fous := make([]Fou, 0, len(msgs)) + for _, m := range msgs { + f, err := deserializeFouMsg(m) + if err != nil { + return fous, err + } + + fous = append(fous, f) + } + + return fous, nil +} + +func deserializeFouMsg(msg []byte) (Fou, error) { + // we'll skip to byte 4 to first attribute + msg = msg[3:] + var shift int + fou := Fou{} + + for { + // attribute header is at least 16 bits + if len(msg) < 4 { + return fou, ErrAttrHeaderTruncated + } + + lgt := int(binary.BigEndian.Uint16(msg[0:2])) + if len(msg) < lgt+4 { + return fou, ErrAttrBodyTruncated + } + attr := binary.BigEndian.Uint16(msg[2:4]) + + shift = lgt + 3 + switch attr { + case FOU_ATTR_AF: + fou.Family = int(msg[5]) + case FOU_ATTR_PORT: + fou.Port = int(binary.BigEndian.Uint16(msg[5:7])) + // port is 2 bytes + shift = lgt + 2 + case FOU_ATTR_IPPROTO: + fou.Protocol = int(msg[5]) + case FOU_ATTR_TYPE: + fou.EncapType = int(msg[5]) + } + + msg = msg[shift:] + + if len(msg) < 4 { + break + } + } + + return fou, nil +} |