config: Enable to configure VRF via config file

This patch enables to configure VRF tables by using config file. This
feature is useful when using VRF-Neighbor feature.

Example of Usage:

```toml
[[vrfs]]
  [vrfs.config]
    name = "vrf1"
    id = 1
    rd = "65000:100"
    both-rt-list = ["65000:100"]
```

Signed-off-by: IWASE Yusuke <iwase.yusuke0@gmail.com>

1 files changed, 124 insertions, 0 deletions

diff --git a/config/bgp_configs.go b/config/bgp_configs.go
index 402bff40..062ef8f7 100644
--- a/config/bgp_configs.go
+++ b/config/bgp_configs.go
@@ -1250,6 +1250,112 @@ func (lhs *Mrt) Equal(rhs *Mrt) bool {
 }
 
 // struct for container gobgp:state.
+// Configured states of VRF.
+type VrfState struct {
+	// original -> gobgp:name
+	// Unique name among all VRF instances.
+	Name string `mapstructure:"name" json:"name,omitempty"`
+	// original -> gobgp:id
+	// Unique identifier among all VRF instances.
+	Id uint32 `mapstructure:"id" json:"id,omitempty"`
+	// original -> gobgp:rd
+	// Route Distinguisher for this VRF.
+	Rd string `mapstructure:"rd" json:"rd,omitempty"`
+	// original -> gobgp:import-rt
+	// List of import Route Targets for this VRF.
+	ImportRtList []string `mapstructure:"import-rt-list" json:"import-rt-list,omitempty"`
+	// original -> gobgp:export-rt
+	// List of export Route Targets for this VRF.
+	ExportRtList []string `mapstructure:"export-rt-list" json:"export-rt-list,omitempty"`
+}
+
+// struct for container gobgp:config.
+// Configuration parameters for VRF.
+type VrfConfig struct {
+	// original -> gobgp:name
+	// Unique name among all VRF instances.
+	Name string `mapstructure:"name" json:"name,omitempty"`
+	// original -> gobgp:id
+	// Unique identifier among all VRF instances.
+	Id uint32 `mapstructure:"id" json:"id,omitempty"`
+	// original -> gobgp:rd
+	// Route Distinguisher for this VRF.
+	Rd string `mapstructure:"rd" json:"rd,omitempty"`
+	// original -> gobgp:import-rt
+	// List of import Route Targets for this VRF.
+	ImportRtList []string `mapstructure:"import-rt-list" json:"import-rt-list,omitempty"`
+	// original -> gobgp:export-rt
+	// List of export Route Targets for this VRF.
+	ExportRtList []string `mapstructure:"export-rt-list" json:"export-rt-list,omitempty"`
+	// original -> gobgp:both-rt
+	// List of both import and export Route Targets for this VRF. Each
+	// configuration for import and export Route Targets will be preferred.
+	BothRtList []string `mapstructure:"both-rt-list" json:"both-rt-list,omitempty"`
+}
+
+func (lhs *VrfConfig) Equal(rhs *VrfConfig) bool {
+	if lhs == nil || rhs == nil {
+		return false
+	}
+	if lhs.Name != rhs.Name {
+		return false
+	}
+	if lhs.Id != rhs.Id {
+		return false
+	}
+	if lhs.Rd != rhs.Rd {
+		return false
+	}
+	if len(lhs.ImportRtList) != len(rhs.ImportRtList) {
+		return false
+	}
+	for idx, l := range lhs.ImportRtList {
+		if l != rhs.ImportRtList[idx] {
+			return false
+		}
+	}
+	if len(lhs.ExportRtList) != len(rhs.ExportRtList) {
+		return false
+	}
+	for idx, l := range lhs.ExportRtList {
+		if l != rhs.ExportRtList[idx] {
+			return false
+		}
+	}
+	if len(lhs.BothRtList) != len(rhs.BothRtList) {
+		return false
+	}
+	for idx, l := range lhs.BothRtList {
+		if l != rhs.BothRtList[idx] {
+			return false
+		}
+	}
+	return true
+}
+
+// struct for container gobgp:vrf.
+// VRF instance configurations on the local system.
+type Vrf struct {
+	// original -> gobgp:name
+	// original -> gobgp:vrf-config
+	// Configuration parameters for VRF.
+	Config VrfConfig `mapstructure:"config" json:"config,omitempty"`
+	// original -> gobgp:vrf-state
+	// Configured states of VRF.
+	State VrfState `mapstructure:"state" json:"state,omitempty"`
+}
+
+func (lhs *Vrf) Equal(rhs *Vrf) bool {
+	if lhs == nil || rhs == nil {
+		return false
+	}
+	if !lhs.Config.Equal(&(rhs.Config)) {
+		return false
+	}
+	return true
+}
+
+// struct for container gobgp:state.
 // Configuration parameters relating to BMP server.
 type BmpServerState struct {
 	// original -> gobgp:address
@@ -4785,6 +4891,8 @@ type Bgp struct {
 	RpkiServers []RpkiServer `mapstructure:"rpki-servers" json:"rpki-servers,omitempty"`
 	// original -> gobgp:bmp-servers
 	BmpServers []BmpServer `mapstructure:"bmp-servers" json:"bmp-servers,omitempty"`
+	// original -> gobgp:vrfs
+	Vrfs []Vrf `mapstructure:"vrfs" json:"vrfs,omitempty"`
 	// original -> gobgp:mrt-dump
 	MrtDump []Mrt `mapstructure:"mrt-dump" json:"mrt-dump,omitempty"`
 	// original -> gobgp:zebra
@@ -4866,6 +4974,22 @@ func (lhs *Bgp) Equal(rhs *Bgp) bool {
 			}
 		}
 	}
+	if len(lhs.Vrfs) != len(rhs.Vrfs) {
+		return false
+	}
+	{
+		lmap := make(map[string]*Vrf)
+		for i, l := range lhs.Vrfs {
+			lmap[mapkey(i, string(l.Config.Name))] = &lhs.Vrfs[i]
+		}
+		for i, r := range rhs.Vrfs {
+			if l, y := lmap[mapkey(i, string(r.Config.Name))]; !y {
+				return false
+			} else if !r.Equal(l) {
+				return false
+			}
+		}
+	}
 	if len(lhs.MrtDump) != len(rhs.MrtDump) {
 		return false
 	}