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net/{interfaces,netmon}, all: merge net/interfaces package into net/netmon

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In prep for most of the package funcs in net/interfaces to become
methods in a long-lived netmon.Monitor that can cache things.  (Many
of the funcs are very heavy to call regularly, whereas the long-lived
netmon.Monitor can subscribe to things from the OS and remember
answers to questions it's asked regularly later)

Updates tailscale/corp#10910
Updates tailscale/corp#18960
Updates #7967
Updates #3299

Change-Id: Ie4e8dedb70136af2d611b990b865a822cd1797e5
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2024-04-27 21:18:18 -07:00
committed by Brad Fitzpatrick
parent 6b95219e3a
commit b9adbe2002
45 changed files with 846 additions and 874 deletions
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11
ipn/ipnlocal/local.go
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@@ -59,7 +59,6 @@ import (
"tailscale.com/net/dns"
"tailscale.com/net/dnscache"
"tailscale.com/net/dnsfallback"
"tailscale.com/net/interfaces"
"tailscale.com/net/netcheck"
"tailscale.com/net/netkernelconf"
"tailscale.com/net/netmon"
@@ -2029,18 +2028,18 @@ var removeFromDefaultRoute = []netip.Prefix{
// Given that "internal" routes don't leave the device, we choose to
// trust them more, allowing access to them when an Exit Node is enabled.
func internalAndExternalInterfaces() (internal, external []netip.Prefix, err error) {
il, err := interfaces.GetList()
il, err := netmon.GetInterfaceList()
if err != nil {
return nil, nil, err
}
return internalAndExternalInterfacesFrom(il, runtime.GOOS)
}
func internalAndExternalInterfacesFrom(il interfaces.List, goos string) (internal, external []netip.Prefix, err error) {
func internalAndExternalInterfacesFrom(il netmon.InterfaceList, goos string) (internal, external []netip.Prefix, err error) {
// We use an IPSetBuilder here to canonicalize the prefixes
// and to remove any duplicate entries.
var internalBuilder, externalBuilder netipx.IPSetBuilder
if err := il.ForeachInterfaceAddress(func(iface interfaces.Interface, pfx netip.Prefix) {
if err := il.ForeachInterfaceAddress(func(iface netmon.Interface, pfx netip.Prefix) {
if tsaddr.IsTailscaleIP(pfx.Addr()) {
return
}
@@ -2084,7 +2083,7 @@ func internalAndExternalInterfacesFrom(il interfaces.List, goos string) (interna
func interfaceRoutes() (ips *netipx.IPSet, hostIPs []netip.Addr, err error) {
var b netipx.IPSetBuilder
if err := interfaces.ForeachInterfaceAddress(func(_ interfaces.Interface, pfx netip.Prefix) {
if err := netmon.ForeachInterfaceAddress(func(_ netmon.Interface, pfx netip.Prefix) {
if tsaddr.IsTailscaleIP(pfx.Addr()) {
return
}
@@ -3647,7 +3646,7 @@ func shouldUseOneCGNATRoute(logf logger.Logf, controlKnobs *controlknobs.Knobs,
// use fine-grained routes if another interfaces is also using the CGNAT
// IP range.
if versionOS == "macOS" {
hasCGNATInterface, err := interfaces.HasCGNATInterface()
hasCGNATInterface, err := netmon.HasCGNATInterface()
if err != nil {
logf("shouldUseOneCGNATRoute: Could not determine if any interfaces use CGNAT: %v", err)
return false