gprs_ns2: inform the NS user (BSSGP) about the MTU of a NSE
The BSSGP layer needs to know the MTU of the NS UNIDATA payload.
The MTU can be 0 if the NSE doesn't contain any NSVC.
Every status indication will contain the mtu value.
The MTU in the status indication contains the maximum transfer
unit of a BSSGP message. From NS side the maximum SDU.
Related: OS#4889
Change-Id: I5016b295db6185ec131d83089cf6c806e34ef1b6
diff --git a/src/gb/gprs_ns2_udp.c b/src/gb/gprs_ns2_udp.c
index 0f22458..36f6a97 100644
--- a/src/gb/gprs_ns2_udp.c
+++ b/src/gb/gprs_ns2_udp.c
@@ -368,6 +368,10 @@
dscp, rc, errno);
}
+ /* IPv4: max fragmented payload can be (13 bit) * 8 byte => 65535.
+ * IPv6: max payload can be 65535 (RFC 2460).
+ * UDP header = 8 byte */
+ bind->mtu = 65535 - 8;
if (result)
*result = bind;