From 43e205fc32ea14d0c466572fd418e725b79c94d0 Mon Sep 17 00:00:00 2001
From: Philippe Antoine <contact@catenacyber.fr>
Date: Thu, 18 Apr 2019 16:04:50 +0200
Subject: [PATCH] smtp: rset command resets bdat chunks length

Fixes #1860
---
 src/app-layer-smtp.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/app-layer-smtp.c b/src/app-layer-smtp.c
index 4d9c8ca08f..318264f23e 100644
--- a/src/app-layer-smtp.c
+++ b/src/app-layer-smtp.c
@@ -1275,6 +1275,11 @@ static int SMTPProcessRequest(SMTPState *state, Flow *f,
                 SCReturnInt(-1);
             }
             state->current_command = SMTP_COMMAND_OTHER_CMD;
+        } else if (state->current_line_len >= 4 &&
+                   SCMemcmpLowercase("rset", state->current_line, 4) == 0) {
+            // Resets chunk index in case of connection reuse
+            state->bdat_chunk_idx = 0;
+            state->curr_tx->done = 1;
         } else {
             state->current_command = SMTP_COMMAND_OTHER_CMD;
         }
-- 
2.47.2