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groups.go
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groups.go
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// SPDX-License-Identifier: Apache-2.0
// Copyright Authors of Cilium
package api
import (
"context"
"fmt"
"net/netip"
"sync"
"github.com/cilium/cilium/pkg/ip"
)
const (
AWSProvider = "AWS" // AWS provider key
)
var (
providers = sync.Map{} // map with the list of providers to callback to retrieve info from.
)
// GroupProviderFunc is a func that need to be register to be able to
// register a new provider in the platform.
type GroupProviderFunc func(context.Context, *ToGroups) ([]netip.Addr, error)
// ToGroups structure to store all kinds of new integrations that needs a new
// derivative policy.
type ToGroups struct {
AWS *AWSGroup `json:"aws,omitempty"`
}
// AWSGroup is an structure that can be used to whitelisting information from AWS integration
type AWSGroup struct {
Labels map[string]string `json:"labels,omitempty"`
SecurityGroupsIds []string `json:"securityGroupsIds,omitempty"`
SecurityGroupsNames []string `json:"securityGroupsNames,omitempty"`
Region string `json:"region,omitempty"`
}
// RegisterToGroupsProvider it will register a new callback that will be used
// when a new ToGroups rule is added.
func RegisterToGroupsProvider(providerName string, callback GroupProviderFunc) {
providers.Store(providerName, callback)
}
// GetCidrSet will return the CIDRRule for the rule using the callbacks that
// are register in the platform.
func (group *ToGroups) GetCidrSet(ctx context.Context) ([]CIDRRule, error) {
var addrs []netip.Addr
// Get per provider CIDRSet
if group.AWS != nil {
callbackInterface, ok := providers.Load(AWSProvider)
if !ok {
return nil, fmt.Errorf("Provider %s is not registered", AWSProvider)
}
callback, ok := callbackInterface.(GroupProviderFunc)
if !ok {
return nil, fmt.Errorf("Provider callback for %s is not a valid instance", AWSProvider)
}
awsAddrs, err := callback(ctx, group)
if err != nil {
return nil, fmt.Errorf(
"Cannot retrieve data from %s provider: %s",
AWSProvider, err)
}
addrs = append(addrs, awsAddrs...)
}
resultAddrs := ip.KeepUniqueAddrs(addrs)
return addrsToCIDRRules(resultAddrs), nil
}