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Merge pull request #1 from kradalby/ip-pool-test

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Fix empty ip issue and remove network/broadcast addresses
This commit is contained in:
Kristoffer Dalby 2021-08-03 10:12:09 +01:00 committed by GitHub
commit 465669f650
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 63 additions and 28 deletions
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1
api.go
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@ -445,6 +445,7 @@ func (h *Headscale) handleAuthKey(c *gin.Context, db *gorm.DB, idKey wgkey.Key,
log.Println(err)
return
}
log.Printf("Assigning %s to %s", ip, m.Name)
m.AuthKeyID = uint(pak.ID)
m.IPAddress = ip.String()

28
utils.go
View File

@ -79,21 +79,6 @@ func (h *Headscale) getAvailableIP() (*netaddr.IP, error) {
return nil, err
}
// for _, ip := range usedIps {
// nextIP := ip.Next()
// if !containsIPs(usedIps, nextIP) && ipPrefix.Contains(nextIP) {
// return &nextIP, nil
// }
// }
// // If there are no IPs in use, we are starting fresh and
// // can issue IPs from the beginning of the prefix.
// ip := ipPrefix.IP()
// return &ip, nil
// return nil, fmt.Errorf("failed to find any available IP in %s", ipPrefix)
// Get the first IP in our prefix
ip := ipPrefix.IP()
@ -102,8 +87,19 @@ func (h *Headscale) getAvailableIP() (*netaddr.IP, error) {
return nil, fmt.Errorf("could not find any suitable IP in %s", ipPrefix)
}
// Some OS (including Linux) does not like when IPs ends with 0 or 255, which
// is typically called network or broadcast. Lets avoid them and continue
// to look when we get one of those traditionally reserved IPs.
ipRaw := ip.As4()
if ipRaw[3] == 0 || ipRaw[3] == 255 {
ip = ip.Next()
continue
}
if ip.IsZero() &&
ip.IsLoopback() {
ip = ip.Next()
continue
}
@ -121,6 +117,7 @@ func (h *Headscale) getUsedIPs() ([]netaddr.IP, error) {
ips := make([]netaddr.IP, len(addresses))
for index, addr := range addresses {
if addr != "" {
ip, err := netaddr.ParseIP(addr)
if err != nil {
return nil, fmt.Errorf("failed to parse ip from database, %w", err)
@ -128,6 +125,7 @@ func (h *Headscale) getUsedIPs() ([]netaddr.IP, error) {
ips[index] = ip
}
}
return ips, nil
}

52
utils_test.go
View File

@ -10,7 +10,7 @@ func (s *Suite) TestGetAvailableIp(c *check.C) {
c.Assert(err, check.IsNil)
expected := netaddr.MustParseIP("10.27.0.0")
expected := netaddr.MustParseIP("10.27.0.1")
c.Assert(ip.String(), check.Equals, expected.String())
}
@ -46,7 +46,7 @@ func (s *Suite) TestGetUsedIps(c *check.C) {
c.Assert(err, check.IsNil)
expected := netaddr.MustParseIP("10.27.0.0")
expected := netaddr.MustParseIP("10.27.0.1")
c.Assert(ips[0], check.Equals, expected)
@ -91,20 +91,20 @@ func (s *Suite) TestGetMultiIp(c *check.C) {
c.Assert(len(ips), check.Equals, 350)
c.Assert(ips[0], check.Equals, netaddr.MustParseIP("10.27.0.0"))
c.Assert(ips[9], check.Equals, netaddr.MustParseIP("10.27.0.9"))
c.Assert(ips[300], check.Equals, netaddr.MustParseIP("10.27.1.44"))
c.Assert(ips[0], check.Equals, netaddr.MustParseIP("10.27.0.1"))
c.Assert(ips[9], check.Equals, netaddr.MustParseIP("10.27.0.10"))
c.Assert(ips[300], check.Equals, netaddr.MustParseIP("10.27.1.47"))
// Check that we can read back the IPs
m1, err := h.GetMachineByID(1)
c.Assert(err, check.IsNil)
c.Assert(m1.IPAddress, check.Equals, netaddr.MustParseIP("10.27.0.0").String())
c.Assert(m1.IPAddress, check.Equals, netaddr.MustParseIP("10.27.0.1").String())
m50, err := h.GetMachineByID(50)
c.Assert(err, check.IsNil)
c.Assert(m50.IPAddress, check.Equals, netaddr.MustParseIP("10.27.0.49").String())
c.Assert(m50.IPAddress, check.Equals, netaddr.MustParseIP("10.27.0.50").String())
expectedNextIP := netaddr.MustParseIP("10.27.1.94")
expectedNextIP := netaddr.MustParseIP("10.27.1.97")
nextIP, err := h.getAvailableIP()
c.Assert(err, check.IsNil)
@ -117,3 +117,39 @@ func (s *Suite) TestGetMultiIp(c *check.C) {
c.Assert(nextIP2.String(), check.Equals, expectedNextIP.String())
}
func (s *Suite) TestGetAvailableIpMachineWithoutIP(c *check.C) {
ip, err := h.getAvailableIP()
c.Assert(err, check.IsNil)
expected := netaddr.MustParseIP("10.27.0.1")
c.Assert(ip.String(), check.Equals, expected.String())
n, err := h.CreateNamespace("test_ip")
c.Assert(err, check.IsNil)
pak, err := h.CreatePreAuthKey(n.Name, false, false, nil)
c.Assert(err, check.IsNil)
_, err = h.GetMachine("test", "testmachine")
c.Assert(err, check.NotNil)
m := Machine{
ID: 0,
MachineKey: "foo",
NodeKey: "bar",
DiscoKey: "faa",
Name: "testmachine",
NamespaceID: n.ID,
Registered: true,
RegisterMethod: "authKey",
AuthKeyID: uint(pak.ID),
}
h.db.Save(&m)
ip2, err := h.getAvailableIP()
c.Assert(err, check.IsNil)
c.Assert(ip2.String(), check.Equals, expected.String())
}