fixeria submitted this change.

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sctp_{server,proxy}: log SCTP TSN, SID, SSN, and data len

This helps finding the respective SCTP DATA chunk in a PCAP file.

Change-Id: I3692e3bfccdb2ab0a705b1f0903181197c0a2237
---
M src/sctp_proxy.erl
M src/sctp_server.erl
2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/src/sctp_proxy.erl b/src/sctp_proxy.erl
index 1c3228a..4ea5e19 100644
--- a/src/sctp_proxy.erl
+++ b/src/sctp_proxy.erl
@@ -181,13 +181,18 @@
 
 %% Handle an #sctp_sndrcvinfo event (MME -> eNB data)
 connected(info, {sctp, _Socket, MmeAddr, MmePort,
-                 {[#sctp_sndrcvinfo{assoc_id = Aid}], Data}},
+                 {[#sctp_sndrcvinfo{assoc_id = Aid,
+                                    stream = SID,
+                                    ssn = SSN,
+                                    tsn = TSN}], Data}},
           #{sock := Sock,
             enb_aid := EnbAid,
             mme_aid := Aid,
             handler := Pid} = S) ->
     ?LOG_DEBUG("MME connection (id=~p, ~p:~p) -> eNB: ~p",
-               [Aid, MmeAddr, MmePort, Data]),
+               [Aid, MmeAddr, MmePort,
+                #{tsn => TSN, sid => SID, ssn => SSN,
+                  len => byte_size(Data), data => Data}]),
     case s1ap_proxy:process_pdu(Pid, Data) of
         {forward, FwdData} ->
             sctp_server:send_data(EnbAid, FwdData);
diff --git a/src/sctp_server.erl b/src/sctp_server.erl
index 0a42011..f269afe 100644
--- a/src/sctp_server.erl
+++ b/src/sctp_server.erl
@@ -203,10 +203,16 @@
 
 %% Handle an #sctp_sndrcvinfo event (incoming data)
 sctp_recv({FromAddr, FromPort,
-           [#sctp_sndrcvinfo{assoc_id = Aid}], Data},
+           [#sctp_sndrcvinfo{assoc_id = Aid,
+                             stream = SID,
+                             ssn = SSN,
+                             tsn = TSN}], Data},
           #server_state{clients = Clients,
                         handler = Handler} = S) ->
-    ?LOG_DEBUG("eNB connection (id=~p, ~p:~p) -> MME: ~p", [Aid, FromAddr, FromPort, Data]),
+    ?LOG_DEBUG("eNB connection (id=~p, ~p:~p) -> MME: ~p",
+               [Aid, FromAddr, FromPort,
+                #{tsn => TSN, sid => SID, ssn => SSN,
+                  len => byte_size(Data), data => Data}]),
     s1gw_metrics:ctr_inc(?S1GW_CTR_S1AP_ENB_ALL_RX),
     case dict:find(Aid, Clients) of
         {ok, #client_state{pid = undefined}} ->

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