From: JDepooter <joel.depooter@safe.com>
Date: Thu, 17 Jan 2019 01:18:20 +0000 (-0800)
Subject: ssh: log the libssh2 error message when ssh session startup fails
X-Git-Tag: curl-7_64_0~31
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=b095a1ca63ab4962e7256616ff02607c5a77e089;p=thirdparty%2Fcurl.git

ssh: log the libssh2 error message when ssh session startup fails

When a ssh session startup fails, it is useful to know why it has
failed. This commit changes the message from:
   "Failure establishing ssh session"
to something like this, for example:
   "Failure establishing ssh session: -5, Unable to exchange encryption keys"

Closes #3481
---

diff --git a/lib/ssh.c b/lib/ssh.c
index f3b0a58be6..8c68adcc17 100644
--- a/lib/ssh.c
+++ b/lib/ssh.c
@@ -667,7 +667,10 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
         break;
       }
       if(rc) {
-        failf(data, "Failure establishing ssh session");
+        char *err_msg = NULL;
+        (void)libssh2_session_last_error(sshc->ssh_session, &err_msg, NULL, 0);
+        failf(data, "Failure establishing ssh session: %d, %s", rc, err_msg);
+
         state(conn, SSH_SESSION_FREE);
         sshc->actualcode = CURLE_FAILED_INIT;
         break;