| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package ddsnmp |
| 4 | |
| 5 | import "maps" |
| 6 | |
| 7 | import "sync" |
| 8 | |
| 9 | // DeviceConnectionInfo holds SNMP connection parameters for a device. |
| 10 | // Registered by SNMP collector jobs, consumed by the topology collector. |
| 11 | type DeviceConnectionInfo struct { |
| 12 | Hostname string |
| 13 | Port int |
| 14 | SNMPVersion string |
| 15 | Community string |
| 16 | V3User string |
| 17 | V3SecurityLevel string |
| 18 | V3AuthProto string |
| 19 | V3AuthKey string |
| 20 | V3PrivProto string |
| 21 | V3PrivKey string |
| 22 | V3ContextName string |
| 23 | MaxRepetitions uint32 |
| 24 | MaxOIDs int |
| 25 | Timeout int |
| 26 | Retries int |
| 27 | SysObjectID string |
| 28 | SysDescr string |
| 29 | SysName string |
| 30 | SysContact string |
| 31 | SysLocation string |
| 32 | Vendor string |
| 33 | Model string |
| 34 | |
| 35 | DisableBulkWalk bool |
| 36 | |
| 37 | ManualProfiles []string |
| 38 | |
| 39 | VnodeGUID string |
| 40 | VnodeLabels map[string]string |
| 41 | } |
| 42 | |
| 43 | // DeviceRegistry is a global registry where SNMP jobs register their connection |
| 44 | // info so the topology collector can discover which devices to poll. |
| 45 | var DeviceRegistry = &deviceRegistry{ |
| 46 | devices: make(map[string]DeviceConnectionInfo), |
| 47 | } |
| 48 | |
| 49 | type deviceRegistry struct { |
| 50 | mu sync.RWMutex |
| 51 | devices map[string]DeviceConnectionInfo |
| 52 | } |
| 53 | |
| 54 | // Register adds or updates a device in the registry. |
| 55 | // Reference types are deep-copied to prevent data races with the caller. |
| 56 | func (r *deviceRegistry) Register(key string, info DeviceConnectionInfo) { |
| 57 | dev := info |
| 58 | if info.ManualProfiles != nil { |
| 59 | dev.ManualProfiles = make([]string, len(info.ManualProfiles)) |
| 60 | copy(dev.ManualProfiles, info.ManualProfiles) |
| 61 | } |
| 62 | if info.VnodeLabels != nil { |
| 63 | dev.VnodeLabels = make(map[string]string, len(info.VnodeLabels)) |
| 64 | maps.Copy(dev.VnodeLabels, info.VnodeLabels) |
| 65 | } |
| 66 | r.mu.Lock() |
| 67 | r.devices[key] = dev |
| 68 | r.mu.Unlock() |
| 69 | } |
| 70 | |
| 71 | // Unregister removes a device from the registry. |
| 72 | func (r *deviceRegistry) Unregister(key string) { |
| 73 | r.mu.Lock() |
| 74 | delete(r.devices, key) |
| 75 | r.mu.Unlock() |
| 76 | } |
| 77 | |
| 78 | // Devices returns a deep-copied snapshot of all registered devices. |
| 79 | func (r *deviceRegistry) Devices() []DeviceConnectionInfo { |
| 80 | r.mu.RLock() |
| 81 | defer r.mu.RUnlock() |
| 82 | |
| 83 | devices := make([]DeviceConnectionInfo, 0, len(r.devices)) |
| 84 | for _, info := range r.devices { |
| 85 | dev := info |
| 86 | if info.ManualProfiles != nil { |
| 87 | dev.ManualProfiles = make([]string, len(info.ManualProfiles)) |
| 88 | copy(dev.ManualProfiles, info.ManualProfiles) |
| 89 | } |
| 90 | if info.VnodeLabels != nil { |
| 91 | dev.VnodeLabels = make(map[string]string, len(info.VnodeLabels)) |
| 92 | maps.Copy(dev.VnodeLabels, info.VnodeLabels) |
| 93 | } |
| 94 | devices = append(devices, dev) |
| 95 | } |
| 96 | return devices |
| 97 | } |
| 98 | |
| 99 | // Len returns the number of registered devices. |
| 100 | func (r *deviceRegistry) Len() int { |
| 101 | r.mu.RLock() |
| 102 | defer r.mu.RUnlock() |
| 103 | return len(r.devices) |
| 104 | } |