TSG-13630 tsg-service-chaining-engine使用mrzcpd捕获报文/回注报文

TSG-13685 tsg-service-chaining-engine使用VXLAN封装Steering/Mirroring的Package

common/src/g_vxlan.cpp

@@ -0,0 +1,67 @@
+#include <netinet/udp.h>
+#include <netinet/ip.h>
+#include <netinet/ether.h>
+
+#include "g_vxlan.h"
+
+void g_vxlan_set_packet_dir(struct g_vxlan *hdr, int dir_is_e2i)
+{
+    hdr->dir_is_e2i = (!!dir_is_e2i);
+}
+
+void g_vxlan_set_chain_index(struct g_vxlan *hdr, int chain_index)
+{
+    hdr->chain_index = (0x1f & chain_index);
+}
+
+void g_vxlan_set_traffic_type(struct g_vxlan *hdr, int traffic_is_decrypted)
+{
+    hdr->traffic_is_decrypted = (!!traffic_is_decrypted);
+}
+
+int g_vxlan_get_packet_dir(struct g_vxlan *hdr)
+{
+    return (!!hdr->dir_is_e2i);
+}
+
+int g_vxlan_get_chain_index(struct g_vxlan *hdr)
+{
+    return hdr->chain_index;
+}
+
+int g_vxlan_get_traffic_type(struct g_vxlan *hdr)
+{
+    return (!!hdr->traffic_is_decrypted);
+}
+
+// return  0 : success
+// return -1 : error
+int g_vxlan_decode(struct g_vxlan **g_vxlan_hdr, const char *raw_data, int raw_len)
+{
+    if (raw_len <= (int)(sizeof(struct ethhdr) + sizeof(struct ip) + sizeof(struct udphdr) + sizeof(struct g_vxlan)))
+    {
+        return -1;
+    }
+
+    struct ethhdr *eth_hdr = (struct ethhdr *)raw_data;
+    if (eth_hdr->h_proto != htons(ETH_P_IP))
+    {
+        return -1;
+    }
+
+    struct ip *ip_hdr = (struct ip *)((char *)eth_hdr + sizeof(struct ethhdr));
+    if (ip_hdr->ip_p != IPPROTO_UDP)
+    {
+        return -1;
+    }
+
+    struct udphdr *udp_hdr = (struct udphdr *)((char *)ip_hdr + sizeof(struct ip));
+    if (udp_hdr->uh_dport != htons(4789))
+    {
+        return -1;
+    }
+
+    *g_vxlan_hdr = (struct g_vxlan *)((char *)udp_hdr + sizeof(struct udphdr));
+
+    return 0;
+}