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all: fix new lint warnings from bumping staticcheck

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In prep for updating to new staticcheck required for Go 1.23.

Updates #12912

Change-Id: If77892a023b79c6fa798f936fc80428fd4ce0673
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2024-08-21 20:47:20 -07:00
committed by Brad Fitzpatrick
parent 4637ac732e
commit 0ff474ff37
7 changed files with 5 additions and 53 deletions
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43
net/netmon/interfaces_linux.go
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@@ -15,8 +15,6 @@ import (
"net"
"net/netip"
"os"
"os/exec"
"runtime"
"strings"
"sync/atomic"
@@ -50,9 +48,6 @@ ens18 0000000A 00000000 0001 0 0 0 0000FFFF
func likelyHomeRouterIPLinux() (ret netip.Addr, myIP netip.Addr, ok bool) {
if procNetRouteErr.Load() {
// If we failed to read /proc/net/route previously, don't keep trying.
if runtime.GOOS == "android" {
return likelyHomeRouterIPAndroid()
}
return ret, myIP, false
}
lineNum := 0
@@ -94,9 +89,6 @@ func likelyHomeRouterIPLinux() (ret netip.Addr, myIP netip.Addr, ok bool) {
}
if err != nil {
procNetRouteErr.Store(true)
if runtime.GOOS == "android" {
return likelyHomeRouterIPAndroid()
}
log.Printf("interfaces: failed to read /proc/net/route: %v", err)
}
if ret.IsValid() {
@@ -137,41 +129,6 @@ func likelyHomeRouterIPLinux() (ret netip.Addr, myIP netip.Addr, ok bool) {
return netip.Addr{}, netip.Addr{}, false
}
// Android apps don't have permission to read /proc/net/route, at
// least on Google devices and the Android emulator.
func likelyHomeRouterIPAndroid() (ret netip.Addr, _ netip.Addr, ok bool) {
cmd := exec.Command("/system/bin/ip", "route", "show", "table", "0")
out, err := cmd.StdoutPipe()
if err != nil {
return
}
if err := cmd.Start(); err != nil {
log.Printf("interfaces: running /system/bin/ip: %v", err)
return
}
// Search for line like "default via 10.0.2.2 dev radio0 table 1016 proto static mtu 1500 "
lineread.Reader(out, func(line []byte) error {
const pfx = "default via "
if !mem.HasPrefix(mem.B(line), mem.S(pfx)) {
return nil
}
line = line[len(pfx):]
sp := bytes.IndexByte(line, ' ')
if sp == -1 {
return nil
}
ipb := line[:sp]
if ip, err := netip.ParseAddr(string(ipb)); err == nil && ip.Is4() {
ret = ip
log.Printf("interfaces: found Android default route %v", ip)
}
return nil
})
cmd.Process.Kill()
cmd.Wait()
return ret, netip.Addr{}, ret.IsValid()
}
func defaultRoute() (d DefaultRouteDetails, err error) {
v, err := defaultRouteInterfaceProcNet()
if err == nil {