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[Openvpn-devel,S] Change in openvpn[release/2.6]: Warn user if INFO control command is too long

Message ID 37df9e97b8e8ea8db6f576e861e934f4252899a2-HTML@gerrit.openvpn.net
State Superseded
Headers show
Series [Openvpn-devel,S] Change in openvpn[release/2.6]: Warn user if INFO control command is too long | expand

Commit Message

flichtenheld (Code Review) Sept. 11, 2023, 12:42 p.m. UTC 
Attention is currently required from: flichtenheld.

Hello flichtenheld,

I'd like you to do a code review.
Please visit

    http://gerrit.openvpn.net/c/openvpn/+/329?usp=email

to review the following change.


Change subject: Warn user if INFO control command is too long
......................................................................

Warn user if INFO control command is too long

"INFO_PRE,..." command length is limited to 256 bytes. If the server
implementation pushes command which is too long, warn the user and
don't send the truncated command to a management client.

Change-Id: If3c27a2a2ba24f2af0e3e3c95eea57ed420b2542
Signed-off-by: Lev Stipakov <lev@openvpn.net>
---
M src/openvpn/push.c
1 file changed, 8 insertions(+), 2 deletions(-)



  git pull ssh://gerrit.openvpn.net:29418/openvpn refs/changes/29/329/1
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Patch

diff --git a/src/openvpn/push.c b/src/openvpn/push.c
index d468211..19849c5 100644
--- a/src/openvpn/push.c
+++ b/src/openvpn/push.c
@@ -244,8 +244,14 @@ 
          * for management greeting and we don't want to confuse the client
          */
         struct buffer out = alloc_buf_gc(256, &gc);
-        buf_printf(&out, ">%s:%s", "INFOMSG", m);
-        management_notify_generic(management, BSTR(&out));
+        if (buf_printf(&out, ">%s:%s", "INFOMSG", m))
+        {
+            management_notify_generic(management, BSTR(&out));
+        }
+        else
+        {
+            msg(D_PUSH_ERRORS, "WARNING: Received INFO command is too long, won't notify management client.");
+        }
 
         gc_free(&gc);
     }