support ipv4 ToS and ipv6 TrafficClass

Signed-off-by: 梁超众 <liangchaozhong@xiaomi.com>

include/netinet/in.h

@@ -129,6 +129,8 @@
                                                     * the incoming packet */
 #define IPV6_RECVPKTINFO      (__SO_PROTOCOL + 9)  /* It functions just same as
                                                     * IPV6_PKTINFO for now */
+#define IPV6_TCLASS           (__SO_PROTOCOL + 10) /* Access the Traffic Class
+                                                    * field */
 
 /* Values used with SIOCSIFMCFILTER and SIOCGIFMCFILTER ioctl's */
 

include/nuttx/net/ip.h

@@ -77,6 +77,26 @@
 #define IP_PROTO_UDP      17
 #define IP_PROTO_ICMP6    58
 
+/* Values for the TOS field */
+
+#define IPTOS_TOS_MASK    0x1e
+#define IPTOS_TOS(tos)    ((tos) & IPTOS_TOS_MASK)
+#define	IPTOS_LOWDELAY    0x10
+#define	IPTOS_THROUGHPUT  0x08
+#define	IPTOS_RELIABILITY 0x04
+#define	IPTOS_MINCOST     0x02
+
+#define IPTOS_PREC_MASK            0xe0
+#define IPTOS_PREC(tos)            ((tos) & IPTOS_PREC_MASK)
+#define IPTOS_PREC_NETCONTROL      0xe0
+#define IPTOS_PREC_INTERNETCONTROL 0xc0
+#define IPTOS_PREC_CRITIC_ECP      0xa0
+#define IPTOS_PREC_FLASHOVERRIDE   0x80
+#define IPTOS_PREC_FLASH           0x60
+#define IPTOS_PREC_IMMEDIATE       0x40
+#define IPTOS_PREC_PRIORITY        0x20
+#define IPTOS_PREC_ROUTINE         0x00
+
 /* Flag bits in 16-bit flags + fragment offset IPv4 header field */
 
 #define IP_FLAG_RESERVED  0x8000

include/nuttx/net/net.h

@@ -222,6 +222,11 @@ struct socket_conn_s
 
   uint8_t       s_flags;     /* See _SF_* definitions */
 
+  /* Definitions of IPv4 TOS and IPv6 Traffic Class */
+
+  uint8_t       s_tos;       /* IPv4 Type of Service */
+#define s_tclass s_tos       /* IPv6 traffic class defination */
+
   /* Connection-specific content may follow */
 };