release: version 1.1.6 - Add local IP filtering and SLL support

Features:
- Add local_ips configuration option for filtering traffic to local machine
- Auto-detection of local IP addresses (excludes loopback 127.x.x.x, ::1)
- Support interface 'any' for capturing on all network interfaces
- Add Linux SLL (cooked capture) support for interface 'any'
- Generate BPF filter with 'dst host' for local IP filtering
- Add LinkType field to RawPacket for proper packet parsing

Testing:
- Add unit tests for local IP detection (detectLocalIPs, extractIP)
- Add unit tests for SLL packet parsing (IPv4 and IPv6)
- Update capture tests for new packetToRawPacket method

Configuration:
- Update config.yml.example with local_ips documentation
- Update RPM spec to version 1.1.6 with changelog

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

api/types.go

@@ -21,6 +21,7 @@ type Config struct {
 	Interface        string   `json:"interface"`
 	ListenPorts      []uint16 `json:"listen_ports"`
 	BPFFilter        string   `json:"bpf_filter,omitempty"`
+	LocalIPs         []string `json:"local_ips,omitempty"` // Local IPs to monitor (empty = auto-detect, excludes loopback)
 	FlowTimeoutSec   int      `json:"flow_timeout_sec,omitempty"` // Timeout for TLS handshake extraction (default: 30)
 	PacketBufferSize int      `json:"packet_buffer_size,omitempty"` // Buffer size for packet channel (default: 1000)
 	LogLevel         string   `json:"log_level,omitempty"` // Log level: debug, info, warn, error (default: info)
@@ -44,8 +45,9 @@ type TCPMeta struct {
 
 // RawPacket represents a raw packet captured from the network
 type RawPacket struct {
-	Data      []byte `json:"-"`         // Not serialized
+	Data      []byte `json:"-"`         // Raw packet data including link-layer header
 	Timestamp int64  `json:"timestamp"` // nanoseconds since epoch
+	LinkType  int    `json:"-"`         // Link type (1=Ethernet, 101=Linux SLL, etc.)
 }
 
 // TLSClientHello represents a client-side TLS ClientHello with IP/TCP metadata