forked from vishvananda/netlink
-
Notifications
You must be signed in to change notification settings - Fork 2
/
gtp_linux.go
239 lines (218 loc) · 6.66 KB
/
gtp_linux.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
package netlink
import (
"fmt"
"net"
"strings"
"syscall"
"github.com/vishvananda/netlink/nl"
"golang.org/x/sys/unix"
)
type PDP struct {
Version uint32
TID uint64
PeerAddress net.IP
MSAddress net.IP
Flow uint16
NetNSFD uint32
ITEI uint32
OTEI uint32
}
func (pdp *PDP) String() string {
elems := []string{}
elems = append(elems, fmt.Sprintf("Version: %d", pdp.Version))
if pdp.Version == 0 {
elems = append(elems, fmt.Sprintf("TID: %d", pdp.TID))
} else if pdp.Version == 1 {
elems = append(elems, fmt.Sprintf("TEI: %d/%d", pdp.ITEI, pdp.OTEI))
}
elems = append(elems, fmt.Sprintf("MS-Address: %s", pdp.MSAddress))
elems = append(elems, fmt.Sprintf("Peer-Address: %s", pdp.PeerAddress))
return fmt.Sprintf("{%s}", strings.Join(elems, " "))
}
func (p *PDP) parseAttributes(attrs []syscall.NetlinkRouteAttr) error {
for _, a := range attrs {
switch a.Attr.Type {
case nl.GENL_GTP_ATTR_VERSION:
p.Version = native.Uint32(a.Value)
case nl.GENL_GTP_ATTR_TID:
p.TID = native.Uint64(a.Value)
case nl.GENL_GTP_ATTR_PEER_ADDRESS:
p.PeerAddress = net.IP(a.Value)
case nl.GENL_GTP_ATTR_MS_ADDRESS:
p.MSAddress = net.IP(a.Value)
case nl.GENL_GTP_ATTR_FLOW:
p.Flow = native.Uint16(a.Value)
case nl.GENL_GTP_ATTR_NET_NS_FD:
p.NetNSFD = native.Uint32(a.Value)
case nl.GENL_GTP_ATTR_I_TEI:
p.ITEI = native.Uint32(a.Value)
case nl.GENL_GTP_ATTR_O_TEI:
p.OTEI = native.Uint32(a.Value)
}
}
return nil
}
func parsePDP(msgs [][]byte) ([]*PDP, error) {
pdps := make([]*PDP, 0, len(msgs))
for _, m := range msgs {
attrs, err := nl.ParseRouteAttr(m[nl.SizeofGenlmsg:])
if err != nil {
return nil, err
}
pdp := &PDP{}
if err := pdp.parseAttributes(attrs); err != nil {
return nil, err
}
pdps = append(pdps, pdp)
}
return pdps, nil
}
func (h *Handle) GTPPDPList() ([]*PDP, error) {
f, err := h.GenlFamilyGet(nl.GENL_GTP_NAME)
if err != nil {
return nil, err
}
msg := &nl.Genlmsg{
Command: nl.GENL_GTP_CMD_GETPDP,
Version: nl.GENL_GTP_VERSION,
}
req := h.newNetlinkRequest(int(f.ID), unix.NLM_F_DUMP)
req.AddData(msg)
msgs, err := req.Execute(unix.NETLINK_GENERIC, 0)
if err != nil {
return nil, err
}
return parsePDP(msgs)
}
func GTPPDPList() ([]*PDP, error) {
return pkgHandle.GTPPDPList()
}
func gtpPDPGet(req *nl.NetlinkRequest) (*PDP, error) {
msgs, err := req.Execute(unix.NETLINK_GENERIC, 0)
if err != nil {
return nil, err
}
pdps, err := parsePDP(msgs)
if err != nil {
return nil, err
}
if len(pdps) != 1 {
return nil, fmt.Errorf("invalid reqponse for GENL_GTP_CMD_GETPDP")
}
return pdps[0], nil
}
func (h *Handle) GTPPDPByTID(link Link, tid int) (*PDP, error) {
f, err := h.GenlFamilyGet(nl.GENL_GTP_NAME)
if err != nil {
return nil, err
}
msg := &nl.Genlmsg{
Command: nl.GENL_GTP_CMD_GETPDP,
Version: nl.GENL_GTP_VERSION,
}
req := h.newNetlinkRequest(int(f.ID), 0)
req.AddData(msg)
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_VERSION, nl.Uint32Attr(0)))
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_LINK, nl.Uint32Attr(uint32(link.Attrs().Index))))
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_TID, nl.Uint64Attr(uint64(tid))))
return gtpPDPGet(req)
}
func GTPPDPByTID(link Link, tid int) (*PDP, error) {
return pkgHandle.GTPPDPByTID(link, tid)
}
func (h *Handle) GTPPDPByITEI(link Link, itei int) (*PDP, error) {
f, err := h.GenlFamilyGet(nl.GENL_GTP_NAME)
if err != nil {
return nil, err
}
msg := &nl.Genlmsg{
Command: nl.GENL_GTP_CMD_GETPDP,
Version: nl.GENL_GTP_VERSION,
}
req := h.newNetlinkRequest(int(f.ID), 0)
req.AddData(msg)
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_VERSION, nl.Uint32Attr(1)))
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_LINK, nl.Uint32Attr(uint32(link.Attrs().Index))))
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_I_TEI, nl.Uint32Attr(uint32(itei))))
return gtpPDPGet(req)
}
func GTPPDPByITEI(link Link, itei int) (*PDP, error) {
return pkgHandle.GTPPDPByITEI(link, itei)
}
func (h *Handle) GTPPDPByMSAddress(link Link, addr net.IP) (*PDP, error) {
f, err := h.GenlFamilyGet(nl.GENL_GTP_NAME)
if err != nil {
return nil, err
}
msg := &nl.Genlmsg{
Command: nl.GENL_GTP_CMD_GETPDP,
Version: nl.GENL_GTP_VERSION,
}
req := h.newNetlinkRequest(int(f.ID), 0)
req.AddData(msg)
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_VERSION, nl.Uint32Attr(0)))
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_LINK, nl.Uint32Attr(uint32(link.Attrs().Index))))
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_MS_ADDRESS, []byte(addr.To4())))
return gtpPDPGet(req)
}
func GTPPDPByMSAddress(link Link, addr net.IP) (*PDP, error) {
return pkgHandle.GTPPDPByMSAddress(link, addr)
}
func (h *Handle) GTPPDPAdd(link Link, pdp *PDP) error {
f, err := h.GenlFamilyGet(nl.GENL_GTP_NAME)
if err != nil {
return err
}
msg := &nl.Genlmsg{
Command: nl.GENL_GTP_CMD_NEWPDP,
Version: nl.GENL_GTP_VERSION,
}
req := h.newNetlinkRequest(int(f.ID), unix.NLM_F_EXCL|unix.NLM_F_ACK)
req.AddData(msg)
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_VERSION, nl.Uint32Attr(pdp.Version)))
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_LINK, nl.Uint32Attr(uint32(link.Attrs().Index))))
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_PEER_ADDRESS, []byte(pdp.PeerAddress.To4())))
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_MS_ADDRESS, []byte(pdp.MSAddress.To4())))
switch pdp.Version {
case 0:
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_TID, nl.Uint64Attr(pdp.TID)))
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_FLOW, nl.Uint16Attr(pdp.Flow)))
case 1:
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_I_TEI, nl.Uint32Attr(pdp.ITEI)))
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_O_TEI, nl.Uint32Attr(pdp.OTEI)))
default:
return fmt.Errorf("unsupported GTP version: %d", pdp.Version)
}
_, err = req.Execute(unix.NETLINK_GENERIC, 0)
return err
}
func GTPPDPAdd(link Link, pdp *PDP) error {
return pkgHandle.GTPPDPAdd(link, pdp)
}
func (h *Handle) GTPPDPDel(link Link, pdp *PDP) error {
f, err := h.GenlFamilyGet(nl.GENL_GTP_NAME)
if err != nil {
return err
}
msg := &nl.Genlmsg{
Command: nl.GENL_GTP_CMD_DELPDP,
Version: nl.GENL_GTP_VERSION,
}
req := h.newNetlinkRequest(int(f.ID), unix.NLM_F_EXCL|unix.NLM_F_ACK)
req.AddData(msg)
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_VERSION, nl.Uint32Attr(pdp.Version)))
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_LINK, nl.Uint32Attr(uint32(link.Attrs().Index))))
switch pdp.Version {
case 0:
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_TID, nl.Uint64Attr(pdp.TID)))
case 1:
req.AddData(nl.NewRtAttr(nl.GENL_GTP_ATTR_I_TEI, nl.Uint32Attr(pdp.ITEI)))
default:
return fmt.Errorf("unsupported GTP version: %d", pdp.Version)
}
_, err = req.Execute(unix.NETLINK_GENERIC, 0)
return err
}
func GTPPDPDel(link Link, pdp *PDP) error {
return pkgHandle.GTPPDPDel(link, pdp)
}