bugfix: TSG-19996 parse the packet as GTP-U when source port or dest port is 2152.v1.2.11-20240319

1 files changed, 9 insertions, 7 deletions

diff --git a/common/src/packet.cpp b/common/src/packet.cpp
index d93543e..af757c8 100644
--- a/common/src/packet.cpp
+++ b/common/src/packet.cpp
@@ -863,17 +863,19 @@ static inline const char *parse_udp(struct packet *handler, const char *data, ui
     struct udphdr *hdr = (struct udphdr *)data;
     SET_LAYER(handler, layer, LAYER_TYPE_UDP, sizeof(struct udphdr), data, len);
 
-    switch (ntohs(hdr->uh_dport))
+    // VXLAN_DPORT 4789
+    if (ntohs(hdr->uh_dport) == 4789)
     {
-    // VXLAN_DPORT
-    case 4789:
         return parse_vxlan(handler, layer->pld_ptr, layer->pld_len);
-    // GTP1U_PORT
-    case 2152:
+    }
+
+    // GTP1U_PORT 2152
+    if (ntohs(hdr->uh_dport) == 2152 || ntohs(hdr->uh_sport) == 2152)
+    {
         return parse_gtpv1_u(handler, layer->pld_ptr, layer->pld_len);
-    default:
-        return layer->pld_ptr;
     }
+
+    return layer->pld_ptr;
 }
 
 static inline const char *parse_tcp(struct packet *handler, const char *data, uint16_t len)