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-rw-r--r--src/plugins/gtpu/gtpu.h4
-rw-r--r--src/plugins/gtpu/gtpu_encap.c30
2 files changed, 23 insertions, 11 deletions
diff --git a/src/plugins/gtpu/gtpu.h b/src/plugins/gtpu/gtpu.h
index 6331aa31890..05208755d8c 100644
--- a/src/plugins/gtpu/gtpu.h
+++ b/src/plugins/gtpu/gtpu.h
@@ -55,13 +55,15 @@ typedef struct
{
u8 ver_flags;
u8 type;
- u16 length; /* length in octets of the payload */
+ u16 length; /* length in octets of the data following the fixed part of the header */
u32 teid;
u16 sequence;
u8 pdu_number;
u8 next_ext_type;
} gtpu_header_t;
+#define GTPU_V1_HDR_LEN 8
+
#define GTPU_VER_MASK (7<<5)
#define GTPU_PT_BIT (1<<4)
#define GTPU_E_BIT (1<<2)
diff --git a/src/plugins/gtpu/gtpu_encap.c b/src/plugins/gtpu/gtpu_encap.c
index 5c37f4db306..4442c42ad66 100644
--- a/src/plugins/gtpu/gtpu_encap.c
+++ b/src/plugins/gtpu/gtpu_encap.c
@@ -298,19 +298,23 @@ gtpu_encap_inline (vlib_main_t * vm,
/* Fix GTPU length */
gtpu0 = (gtpu_header_t *)(udp0+1);
new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b0)
- - sizeof (*ip4_0) - sizeof(*udp0));
+ - sizeof (*ip4_0) - sizeof(*udp0)
+ - GTPU_V1_HDR_LEN);
gtpu0->length = new_l0;
gtpu1 = (gtpu_header_t *)(udp1+1);
new_l1 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b1)
- - sizeof (*ip4_1) - sizeof(*udp1));
+ - sizeof (*ip4_1) - sizeof(*udp1)
+ - GTPU_V1_HDR_LEN);
gtpu1->length = new_l1;
gtpu2 = (gtpu_header_t *)(udp2+1);
new_l2 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b2)
- - sizeof (*ip4_2) - sizeof(*udp2));
+ - sizeof (*ip4_2) - sizeof(*udp2)
+ - GTPU_V1_HDR_LEN);
gtpu2->length = new_l2;
gtpu3 = (gtpu_header_t *)(udp3+1);
new_l3 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b3)
- - sizeof (*ip4_3) - sizeof(*udp3));
+ - sizeof (*ip4_3) - sizeof(*udp3)
+ - GTPU_V1_HDR_LEN);
gtpu3->length = new_l3;
}
else /* ipv6 */
@@ -397,19 +401,23 @@ gtpu_encap_inline (vlib_main_t * vm,
/* Fix GTPU length */
gtpu0 = (gtpu_header_t *)(udp0+1);
new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b0)
- - sizeof (*ip4_0) - sizeof(*udp0));
+ - sizeof (*ip6_0) - sizeof(*udp0)
+ - GTPU_V1_HDR_LEN);
gtpu0->length = new_l0;
gtpu1 = (gtpu_header_t *)(udp1+1);
new_l1 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b1)
- - sizeof (*ip4_1) - sizeof(*udp1));
+ - sizeof (*ip6_1) - sizeof(*udp1)
+ - GTPU_V1_HDR_LEN);
gtpu1->length = new_l1;
gtpu2 = (gtpu_header_t *)(udp2+1);
new_l2 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b2)
- - sizeof (*ip4_2) - sizeof(*udp2));
+ - sizeof (*ip6_2) - sizeof(*udp2)
+ - GTPU_V1_HDR_LEN);
gtpu2->length = new_l2;
gtpu3 = (gtpu_header_t *)(udp3+1);
new_l3 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b3)
- - sizeof (*ip4_3) - sizeof(*udp3));
+ - sizeof (*ip6_3) - sizeof(*udp3)
+ - GTPU_V1_HDR_LEN);
gtpu3->length = new_l3;
}
@@ -556,7 +564,8 @@ gtpu_encap_inline (vlib_main_t * vm,
/* Fix GTPU length */
gtpu0 = (gtpu_header_t *)(udp0+1);
new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b0)
- - sizeof (*ip4_0) - sizeof(*udp0));
+ - sizeof (*ip4_0) - sizeof(*udp0)
+ - GTPU_V1_HDR_LEN);
gtpu0->length = new_l0;
}
@@ -592,7 +601,8 @@ gtpu_encap_inline (vlib_main_t * vm,
/* Fix GTPU length */
gtpu0 = (gtpu_header_t *)(udp0+1);
new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b0)
- - sizeof (*ip4_0) - sizeof(*udp0));
+ - sizeof (*ip4_0) - sizeof(*udp0)
+ - GTPU_V1_HDR_LEN);
gtpu0->length = new_l0;
}