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* utility iterator for ipset Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com> * split policy -> policy and v1 This commit split out the common policy logic and policy implementation into separate packages. policy contains functions that are independent of the policy implementation, this typically means logic that works on tailcfg types and generic formats. In addition, it defines the PolicyManager interface which the v1 implements. v1 is a subpackage which implements the PolicyManager using the "original" policy implementation. Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com> * use polivyv1 definitions in integration tests These can be marshalled back into JSON, which the new format might not be able to. Also, just dont change it all to JSON strings for now. Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com> * formatter: breaks lines Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com> * remove compareprefix, use tsaddr version Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com> * remove getacl test, add back autoapprover Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com> * use policy manager tag handling Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com> * rename display helper for user Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com> * introduce policy v2 package policy v2 is built from the ground up to be stricter and follow the same pattern for all types of resolvers. TODO introduce aliass resolver Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com> * wire up policyv2 in integration testing Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com> * split policy v2 tests into seperate workflow to work around github limit Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com> * add policy manager output to /debug Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com> * update changelog Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com> --------- Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
110 lines
2.7 KiB
Go
110 lines
2.7 KiB
Go
package policy
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import (
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"net/netip"
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"slices"
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"github.com/juanfont/headscale/hscontrol/types"
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"github.com/juanfont/headscale/hscontrol/util"
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"github.com/samber/lo"
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"tailscale.com/net/tsaddr"
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"tailscale.com/tailcfg"
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)
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// FilterNodesByACL returns the list of peers authorized to be accessed from a given node.
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func FilterNodesByACL(
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node *types.Node,
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nodes types.Nodes,
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filter []tailcfg.FilterRule,
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) types.Nodes {
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var result types.Nodes
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for index, peer := range nodes {
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if peer.ID == node.ID {
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continue
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}
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if node.CanAccess(filter, nodes[index]) || peer.CanAccess(filter, node) {
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result = append(result, peer)
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}
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}
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return result
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}
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// ReduceFilterRules takes a node and a set of rules and removes all rules and destinations
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// that are not relevant to that particular node.
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func ReduceFilterRules(node *types.Node, rules []tailcfg.FilterRule) []tailcfg.FilterRule {
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ret := []tailcfg.FilterRule{}
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for _, rule := range rules {
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// record if the rule is actually relevant for the given node.
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var dests []tailcfg.NetPortRange
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DEST_LOOP:
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for _, dest := range rule.DstPorts {
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expanded, err := util.ParseIPSet(dest.IP, nil)
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// Fail closed, if we can't parse it, then we should not allow
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// access.
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if err != nil {
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continue DEST_LOOP
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}
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if node.InIPSet(expanded) {
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dests = append(dests, dest)
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continue DEST_LOOP
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}
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// If the node exposes routes, ensure they are note removed
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// when the filters are reduced.
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if node.Hostinfo != nil {
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if len(node.Hostinfo.RoutableIPs) > 0 {
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for _, routableIP := range node.Hostinfo.RoutableIPs {
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if expanded.OverlapsPrefix(routableIP) {
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dests = append(dests, dest)
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continue DEST_LOOP
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}
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}
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}
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}
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}
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if len(dests) > 0 {
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ret = append(ret, tailcfg.FilterRule{
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SrcIPs: rule.SrcIPs,
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DstPorts: dests,
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IPProto: rule.IPProto,
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})
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}
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}
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return ret
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}
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// AutoApproveRoutes approves any route that can be autoapproved from
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// the nodes perspective according to the given policy.
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// It reports true if any routes were approved.
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func AutoApproveRoutes(pm PolicyManager, node *types.Node) bool {
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if pm == nil {
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return false
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}
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var newApproved []netip.Prefix
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for _, route := range node.AnnouncedRoutes() {
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if pm.NodeCanApproveRoute(node, route) {
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newApproved = append(newApproved, route)
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}
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}
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if newApproved != nil {
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newApproved = append(newApproved, node.ApprovedRoutes...)
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tsaddr.SortPrefixes(newApproved)
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newApproved = slices.Compact(newApproved)
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newApproved = lo.Filter(newApproved, func(route netip.Prefix, index int) bool {
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return route.IsValid()
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})
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node.ApprovedRoutes = newApproved
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return true
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}
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return false
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}
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