1package hcn
2
3import (
4	"encoding/json"
5	"fmt"
6	"math"
7
8	"github.com/Microsoft/hcsshim/internal/hcserror"
9	"github.com/Microsoft/hcsshim/internal/interop"
10	"github.com/sirupsen/logrus"
11)
12
13// Globals are all global properties of the HCN Service.
14type Globals struct {
15	Version Version `json:"Version"`
16}
17
18// Version is the HCN Service version.
19type Version struct {
20	Major int `json:"Major"`
21	Minor int `json:"Minor"`
22}
23
24type VersionRange struct {
25	MinVersion Version
26	MaxVersion Version
27}
28
29type VersionRanges []VersionRange
30
31var (
32	// HNSVersion1803 added ACL functionality.
33	HNSVersion1803 = VersionRanges{VersionRange{MinVersion: Version{Major: 7, Minor: 2}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}}}
34	// V2ApiSupport allows the use of V2 Api calls and V2 Schema.
35	V2ApiSupport = VersionRanges{VersionRange{MinVersion: Version{Major: 9, Minor: 2}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}}}
36	// Remote Subnet allows for Remote Subnet policies on Overlay networks
37	RemoteSubnetVersion = VersionRanges{VersionRange{MinVersion: Version{Major: 9, Minor: 2}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}}}
38	// A Host Route policy allows for local container to local host communication Overlay networks
39	HostRouteVersion = VersionRanges{VersionRange{MinVersion: Version{Major: 9, Minor: 2}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}}}
40	// HNS 9.3 through 10.0 (not included), and 10.2+ allows for Direct Server Return for loadbalancing
41	DSRVersion = VersionRanges{
42		VersionRange{MinVersion: Version{Major: 9, Minor: 3}, MaxVersion: Version{Major: 9, Minor: math.MaxInt32}},
43		VersionRange{MinVersion: Version{Major: 10, Minor: 2}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}},
44	}
45	// HNS 9.3 through 10.0 (not included) and, 10.4+ provide support for configuring endpoints with /32 prefixes
46	Slash32EndpointPrefixesVersion = VersionRanges{
47		VersionRange{MinVersion: Version{Major: 9, Minor: 3}, MaxVersion: Version{Major: 9, Minor: math.MaxInt32}},
48		VersionRange{MinVersion: Version{Major: 10, Minor: 4}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}},
49	}
50	// HNS 9.3 through 10.0 (not included) and, 10.4+ allow for HNS ACL Policies to support protocol 252 for VXLAN
51	AclSupportForProtocol252Version = VersionRanges{
52		VersionRange{MinVersion: Version{Major: 11, Minor: 0}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}},
53	}
54	// HNS 12.0 allows for session affinity for loadbalancing
55	SessionAffinityVersion = VersionRanges{VersionRange{MinVersion: Version{Major: 12, Minor: 0}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}}}
56	// HNS 10.5 through 11 (not included) and 12.0+ supports Ipv6 dual stack.
57	IPv6DualStackVersion = VersionRanges{
58		VersionRange{MinVersion: Version{Major: 10, Minor: 5}, MaxVersion: Version{Major: 10, Minor: math.MaxInt32}},
59		VersionRange{MinVersion: Version{Major: 12, Minor: 0}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}},
60	}
61	// HNS 13.0 allows for Set Policy support
62	SetPolicyVersion = VersionRanges{VersionRange{MinVersion: Version{Major: 13, Minor: 0}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}}}
63	// HNS 10.3 allows for VXLAN ports
64	VxlanPortVersion = VersionRanges{VersionRange{MinVersion: Version{Major: 10, Minor: 3}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}}}
65
66	//HNS 13.1 allows for L4Proxy Policy support
67	L4ProxyPolicyVersion = VersionRanges{VersionRange{MinVersion: Version{Major: 13, Minor: 1}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}}}
68)
69
70// GetGlobals returns the global properties of the HCN Service.
71func GetGlobals() (*Globals, error) {
72	var version Version
73	err := hnsCall("GET", "/globals/version", "", &version)
74	if err != nil {
75		return nil, err
76	}
77
78	globals := &Globals{
79		Version: version,
80	}
81
82	return globals, nil
83}
84
85type hnsResponse struct {
86	Success bool
87	Error   string
88	Output  json.RawMessage
89}
90
91func hnsCall(method, path, request string, returnResponse interface{}) error {
92	var responseBuffer *uint16
93	logrus.Debugf("[%s]=>[%s] Request : %s", method, path, request)
94
95	err := _hnsCall(method, path, request, &responseBuffer)
96	if err != nil {
97		return hcserror.New(err, "hnsCall ", "")
98	}
99	response := interop.ConvertAndFreeCoTaskMemString(responseBuffer)
100
101	hnsresponse := &hnsResponse{}
102	if err = json.Unmarshal([]byte(response), &hnsresponse); err != nil {
103		return err
104	}
105
106	if !hnsresponse.Success {
107		return fmt.Errorf("HNS failed with error : %s", hnsresponse.Error)
108	}
109
110	if len(hnsresponse.Output) == 0 {
111		return nil
112	}
113
114	logrus.Debugf("Network Response : %s", hnsresponse.Output)
115	err = json.Unmarshal(hnsresponse.Output, returnResponse)
116	if err != nil {
117		return err
118	}
119
120	return nil
121}
122