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TUN-6007: Implement new edge discovery algorithm

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(cherry picked from commit 4f468b8a5d)
This commit is contained in:
Devin Carr
2022-05-20 14:51:36 -07:00
parent f4667c6345
commit c7a6304d32
14 changed files with 1378 additions and 587 deletions
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26
edgediscovery/allregions/regions.go
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@@ -18,7 +18,7 @@ type Regions struct {
// ------------------------------------
// ResolveEdge resolves the Cloudflare edge, returning all regions discovered.
func ResolveEdge(log *zerolog.Logger, region string) (*Regions, error) {
func ResolveEdge(log *zerolog.Logger, region string, overrideIPVersion ConfigIPVersion) (*Regions, error) {
edgeAddrs, err := edgeDiscovery(log, getRegionalServiceName(region))
if err != nil {
return nil, err
@@ -27,8 +27,8 @@ func ResolveEdge(log *zerolog.Logger, region string) (*Regions, error) {
return nil, fmt.Errorf("expected at least 2 Cloudflare Regions regions, but SRV only returned %v", len(edgeAddrs))
}
return &Regions{
region1: NewRegion(edgeAddrs[0]),
region2: NewRegion(edgeAddrs[1]),
region1: NewRegion(edgeAddrs[0], overrideIPVersion),
region2: NewRegion(edgeAddrs[1], overrideIPVersion),
}, nil
}
@@ -56,8 +56,8 @@ func NewNoResolve(addrs []*EdgeAddr) *Regions {
}
return &Regions{
region1: NewRegion(region1),
region2: NewRegion(region2),
region1: NewRegion(region1, Auto),
region2: NewRegion(region2, Auto),
}
}
@@ -95,14 +95,12 @@ func (rs *Regions) GetUnusedAddr(excluding *EdgeAddr, connID int) *EdgeAddr {
// getAddrs tries to grab address form `first` region, then `second` region
// this is an unrolled loop over 2 element array
func getAddrs(excluding *EdgeAddr, connID int, first *Region, second *Region) *EdgeAddr {
addr := first.GetUnusedIP(excluding)
addr := first.AssignAnyAddress(connID, excluding)
if addr != nil {
first.Use(addr, connID)
return addr
}
addr = second.GetUnusedIP(excluding)
addr = second.AssignAnyAddress(connID, excluding)
if addr != nil {
second.Use(addr, connID)
return addr
}
@@ -116,18 +114,18 @@ func (rs *Regions) AvailableAddrs() int {
// GiveBack the address so that other connections can use it.
// Returns true if the address is in this edge.
func (rs *Regions) GiveBack(addr *EdgeAddr) bool {
if found := rs.region1.GiveBack(addr); found {
func (rs *Regions) GiveBack(addr *EdgeAddr, hasConnectivityError bool) bool {
if found := rs.region1.GiveBack(addr, hasConnectivityError); found {
return found
}
return rs.region2.GiveBack(addr)
return rs.region2.GiveBack(addr, hasConnectivityError)
}
// Return regionalized service name if `region` isn't empty, otherwise return the global service name for origintunneld
func getRegionalServiceName(region string) string {
if region != "" {
return region + "-" + srvService // Example: `us-origintunneld`
return region + "-" + srvService // Example: `us-v2-origintunneld`
}
return srvService // Global service is just `origintunneld`
return srvService // Global service is just `v2-origintunneld`
}