TSG-20717 Service Chaining增加全局链路号以支持无历史状态发包v1.3.2-20240628

1 files changed, 99 insertions, 61 deletions

diff --git a/common/include/vxlan.h b/common/include/vxlan.h
index 942c2f3..14e7548 100644
--- a/common/include/vxlan.h
+++ b/common/include/vxlan.h
@@ -12,7 +12,9 @@ extern "C"
 #include "tuple.h"
 
 /*
- * VXLAN Header:
+ ******************************************************************************
+ * Standard VXLAN Header:
+ ******************************************************************************
  *
  *   0                   1                   2                   3
  *   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
@@ -28,87 +30,123 @@ extern "C"
  *       to zero on transmission and ignored on receipt.
  * Reserved fields (24 bits and 8 bits):
  *       MUST be set to zero on transmission and ignored on receipt.
+ *
+ ******************************************************************************
+ * SCE VXLAN Header:
+ ******************************************************************************
+ *
+ *   0                   1                   2                   3
+ *   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |R|R|R|R|I|R|R|R| Reserved    |S|    Traffic Link ID            |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |      high     | type  | low   |D|T|SF index |T|   Reserved    |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ * 		Flags              :  8 bits
+ * 		Reserved           :  7 bits
+ * 		S (StateLess)      :  1 bit
+ *
+ * 		Traffic Link ID    : 16 bits
+ *
+ * 		vlan_id_half_high  :  8 bits
+ * 		link_layer_type    :  4 bits // 二层报文封装格式
+ * 		vlan_id_half_low   :  4 bits
+ *
+ * 		dir                :  1 bit
+ * 		traffic            :  1 bit
+ * 		sf_index           :  5 bits // max value 32
+ * 		online_test        :  1 bit
+ *
+ * 		Reserved           :  8 bit
  */
 
 struct vxlan_hdr
 {
-	uint8_t flags;
-	uint8_t reserved[3];
-
-	// VNI 3 Bytes
-	uint8_t vlan_id_half_high;
-
-	uint8_t link_layer_type : 4; // 二层报文封装格式
-	uint8_t vlan_id_half_low : 4;
-
-	uint8_t dir : 1;
-	uint8_t traffic : 1;
-	uint8_t sf_index : 5; // max value 32
-	uint8_t online_test : 1;
-
-	// Reserved 1 Bytes
-	uint8_t r7 : 1;
-	uint8_t r6 : 1;
-	uint8_t r5 : 1;
-	uint8_t r4 : 1;
-	uint8_t vni_flag : 1;
-	uint8_t r2 : 1;
-	uint8_t r1 : 1;
-	uint8_t r0 : 1;
+	uint16_t flags_reserved;
+	uint16_t link_id;
+	uint16_t vlan_id;
+	uint16_t user_ctx;
 } __attribute__((__packed__));
 
-enum vni_opt
+#define VXLAN_DEFAULT_FLAGS 0x8
+#define VXLAN_DST_PORT 4789
+#define VXLAN_FRAME_HDR_LEN ((int)(sizeof(struct ethhdr) + sizeof(struct ip) + sizeof(struct udphdr) + sizeof(struct vxlan_hdr)))
+
+#define VXLAN_FLAGS_MASK 0xFF00
+#define VXLAN_STATELESS_MASK 0x0001
+#define VXLAN_DIR_MASK 0x8000
+#define VXLAN_TRAFFIC_MASK 0x4000
+#define VXLAN_SF_INDEX_MASK 0x3E00
+
+static inline void vxlan_set_flags(struct vxlan_hdr *hdr, uint8_t flags)
 {
-	VNI_OPT_DIR = 0x80,
-	VNI_OPT_TRAFFIC = 0x40,
-	VNI_OPT_SFINDEX = 0x3f,
-};
+	hdr->flags_reserved = htons((ntohs(hdr->flags_reserved) & ~VXLAN_FLAGS_MASK) | (flags << 8));
+}
 
-#define VXLAN_FLAGS 0x8
-#define VXLAN_DST_PORT 4789
-#define VXLAN_FRAME_HDR_LEN (sizeof(struct ethhdr) + sizeof(struct ip) + sizeof(struct udphdr) + sizeof(struct vxlan_hdr))
+static inline void vxlan_set_dir(struct vxlan_hdr *hdr, uint8_t val)
+{
+	hdr->user_ctx = htons((ntohs(hdr->user_ctx) & ~VXLAN_DIR_MASK) | ((!!val) << 15));
+}
+
+static inline void vxlan_set_traffic(struct vxlan_hdr *hdr, uint8_t val)
+{
+	hdr->user_ctx = htons((ntohs(hdr->user_ctx) & ~VXLAN_TRAFFIC_MASK) | ((!!val) << 14));
+}
+
+static inline void vxlan_set_sf_index(struct vxlan_hdr *hdr, uint8_t val)
+{
+	hdr->user_ctx = htons((ntohs(hdr->user_ctx) & ~VXLAN_SF_INDEX_MASK) | ((val & 0x1F) << 9));
+}
+
+static inline void vxlan_set_link_id(struct vxlan_hdr *hdr, uint16_t val)
+{
+	hdr->link_id = htons(val);
+}
+
+static inline void vxlan_set_stateless(struct vxlan_hdr *hdr, uint8_t val)
+{
+	hdr->flags_reserved = htons((ntohs(hdr->flags_reserved) & ~VXLAN_STATELESS_MASK) | (!!val));
+}
+
+static inline uint8_t vxlan_get_flags(struct vxlan_hdr *hdr)
+{
+	return ((ntohs(hdr->flags_reserved) & VXLAN_FLAGS_MASK) >> 8);
+}
+
+static inline uint8_t vxlan_get_dir(struct vxlan_hdr *hdr)
+{
+	return ((ntohs(hdr->user_ctx) & VXLAN_DIR_MASK) >> 15);
+}
+
+static inline uint8_t vxlan_get_traffic(struct vxlan_hdr *hdr)
+{
+	return ((ntohs(hdr->user_ctx) & VXLAN_TRAFFIC_MASK) >> 14);
+}
+
+static inline uint8_t vxlan_get_sf_index(struct vxlan_hdr *hdr)
+{
+	return ((ntohs(hdr->user_ctx) & VXLAN_SF_INDEX_MASK) >> 9);
+}
 
-static inline void vxlan_set_opt(struct vxlan_hdr *hdr, enum vni_opt opt, uint8_t val)
+static inline uint16_t vxlan_get_link_id(struct vxlan_hdr *hdr)
 {
-    switch (opt)
-    {
-    case VNI_OPT_DIR:
-        hdr->dir = (!!val);
-        break;
-    case VNI_OPT_TRAFFIC:
-        hdr->traffic = (!!val);
-        break;
-    case VNI_OPT_SFINDEX:
-        hdr->sf_index = (0x1f & val);
-        break;
-    default:
-        break;
-    }
+	return ntohs(hdr->link_id);
 }
 
-static inline uint8_t vxlan_get_opt(struct vxlan_hdr *hdr, enum vni_opt opt)
+static inline uint8_t vxlan_get_stateless(struct vxlan_hdr *hdr)
 {
-    switch (opt)
-    {
-    case VNI_OPT_DIR:
-        return hdr->dir;
-    case VNI_OPT_TRAFFIC:
-        return hdr->traffic;
-    case VNI_OPT_SFINDEX:
-        return hdr->sf_index;
-    default:
-        return 0;
-    }
+	return ntohs(hdr->flags_reserved) & VXLAN_STATELESS_MASK;
 }
 
 // return  0 : success
 // return -1 : error
-int vxlan_frame_decode(struct vxlan_hdr **vxlan_hdr, const char *data, uint16_t len);
+int vxlan_frame_decode(struct vxlan_hdr **vxlan_hdr, const char *data, int len);
 void vxlan_frame_encode(char *buff,
 						const u_char eth_src_mac[], const u_char eth_dst_mac[],
 						const in_addr_t ip_src_addr, const in_addr_t ip_dst_addr, uint16_t ip_id,
 						uint16_t udp_src_port, uint16_t udp_pld_len,
-						uint8_t vni_opt_dir, uint8_t vni_opt_traffic, uint8_t vni_opt_sf_index);
+						uint8_t dir, uint8_t traffic, uint8_t sf_index, uint16_t link_id);
 
 uint16_t calculate_vxlan_source_port(struct four_tuple *innermost_tuple4);