Torjus Håkestad
5ba62afec3
Implements a Cisco IOS CLI emulator with four modes (user exec, privileged exec, global config, interface config), Cisco-style command abbreviation (e.g. sh run, conf t), enable password flow, and realistic show command output including running-config, interfaces, IP routes, and VLANs. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
110 lines
2.8 KiB
Go
110 lines
2.8 KiB
Go
package cisco
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import "fmt"
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// iosMode represents the current CLI mode of the IOS state machine.
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type iosMode int
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const (
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modeUserExec iosMode = iota // Router>
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modePrivilegedExec // Router#
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modeGlobalConfig // Router(config)#
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modeInterfaceConfig // Router(config-if)#
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)
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// ifaceInfo holds interface metadata for show commands.
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type ifaceInfo struct {
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name string
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ip string
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mask string
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status string
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protocol string
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mac string
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bandwidth string
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mtu int
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rxPackets int
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txPackets int
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rxBytes int
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txBytes int
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shutdown bool
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desc string
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}
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// iosState holds all mutable state for the Cisco IOS shell session.
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type iosState struct {
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mode iosMode
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hostname string
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model string
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iosVersion string
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serial string
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enablePass string
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interfaces []ifaceInfo
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currentIf string
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}
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func newIOSState(hostname, model, iosVersion, enablePass string) *iosState {
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return &iosState{
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mode: modeUserExec,
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hostname: hostname,
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model: model,
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iosVersion: iosVersion,
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serial: "FTX1524Z0P3",
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enablePass: enablePass,
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interfaces: defaultInterfaces(),
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}
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}
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func defaultInterfaces() []ifaceInfo {
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return []ifaceInfo{
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{
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name: "GigabitEthernet0/0", ip: "192.168.1.1", mask: "255.255.255.0",
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status: "up", protocol: "up", mac: "0050.7966.6800",
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bandwidth: "1000000 Kbit", mtu: 1500,
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rxPackets: 148253, txPackets: 93127, rxBytes: 19284732, txBytes: 8291043,
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},
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{
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name: "GigabitEthernet0/1", ip: "10.0.0.1", mask: "255.255.255.252",
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status: "up", protocol: "up", mac: "0050.7966.6801",
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bandwidth: "1000000 Kbit", mtu: 1500,
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rxPackets: 52104, txPackets: 48891, rxBytes: 4182934, txBytes: 3901284,
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},
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{
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name: "GigabitEthernet0/2", ip: "unassigned", mask: "",
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status: "administratively down", protocol: "down", mac: "0050.7966.6802",
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bandwidth: "1000000 Kbit", mtu: 1500, shutdown: true,
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},
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{
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name: "Vlan1", ip: "172.16.0.1", mask: "255.255.0.0",
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status: "up", protocol: "up", mac: "0050.7966.6810",
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bandwidth: "1000000 Kbit", mtu: 1500,
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rxPackets: 8421, txPackets: 7103, rxBytes: 512384, txBytes: 423901,
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},
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}
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}
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// prompt returns the IOS prompt string for the current mode.
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func (s *iosState) prompt() string {
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switch s.mode {
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case modeUserExec:
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return fmt.Sprintf("%s>", s.hostname)
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case modePrivilegedExec:
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return fmt.Sprintf("%s#", s.hostname)
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case modeGlobalConfig:
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return fmt.Sprintf("%s(config)#", s.hostname)
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case modeInterfaceConfig:
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return fmt.Sprintf("%s(config-if)#", s.hostname)
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default:
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return fmt.Sprintf("%s>", s.hostname)
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}
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}
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// findInterface returns a pointer to the interface with the given name, or nil.
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func (s *iosState) findInterface(name string) *ifaceInfo {
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for i := range s.interfaces {
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if s.interfaces[i].name == name {
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return &s.interfaces[i]
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}
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}
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return nil
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}
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