Files
ctrld/net.go
Cuong Manh Le 54f58cc2e5 feat: capitalize all log messages for better readability
Capitalize the first letter of all log messages throughout the codebase
to improve readability and consistency in logging output.

Key improvements:
- All log messages now start with capital letters
- Consistent formatting across all logging statements
- Improved readability for debugging and monitoring
- Enhanced user experience with better formatted messages

Files updated:
- CLI commands and service management
- Internal client information discovery
- Network operations and configuration
- DNS resolver and proxy operations
- Platform-specific implementations

This completes the final phase of the logging improvement project,
ensuring all log messages follow consistent capitalization standards
for better readability and professional appearance.
2025-10-09 19:12:06 +07:00

56 lines
1.4 KiB
Go

package ctrld
import (
"context"
"sync"
"sync/atomic"
"time"
"tailscale.com/net/netmon"
ctrldnet "github.com/Control-D-Inc/ctrld/internal/net"
)
var (
hasIPv6Once sync.Once
ipv6Available atomic.Bool
)
// HasIPv6 reports whether the current network stack has IPv6 available.
func HasIPv6(ctx context.Context) bool {
hasIPv6Once.Do(func() {
logger := LoggerFromCtx(ctx)
logger.Debug().Msg("Checking for ipv6 availability once")
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
defer cancel()
val := ctrldnet.IPv6Available(ctx)
ipv6Available.Store(val)
logger.Debug().Msgf("ipv6 availability: %v", val)
mon, err := netmon.New(func(format string, args ...any) {})
if err != nil {
logger.Debug().Err(err).Msg("Failed to monitor ipv6 state")
return
}
mon.RegisterChangeCallback(func(delta *netmon.ChangeDelta) {
old := ipv6Available.Load()
cur := delta.Monitor.InterfaceState().HaveV6
if old != cur {
logger.Warn().Msgf("ipv6 availability changed, old: %v, new: %v", old, cur)
} else {
logger.Debug().Msg("ipv6 availability does not Changed")
}
ipv6Available.Store(cur)
})
mon.Start()
})
return ipv6Available.Load()
}
// DisableIPv6 marks IPv6 as unavailable if enabled.
func DisableIPv6(ctx context.Context) {
if ipv6Available.CompareAndSwap(true, false) {
logger := LoggerFromCtx(ctx)
logger.Debug().Msg("Turned off ipv6 availability")
}
}