Problem with key exchange

[jonaschl]

Hi,
line 129 in main.c cause this on the server:

Listening on port 2222.
Accepted a connection.
ssh version: 2
openssh version: 0
Error exchanging keys: `Socket error: disconnected'.
process 9672 reaped

and this on the client

sh root@192.168.103.126 -p 2222 -vvv
OpenSSH_7.1p1, OpenSSL 1.0.2d-fips 9 Jul 2015
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 56: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to 192.168.103.126 [192.168.103.126] port 2222.
debug1: Connection established.
debug1: key_load_public: No such file or directory
debug1: identity file /home/jonatan/.ssh/id_rsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/jonatan/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/jonatan/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/jonatan/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/jonatan/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/jonatan/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/jonatan/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/jonatan/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.1
debug1: Remote protocol version 2.0, remote software version SSH-2.0-billsSSH_3.6.3q3
debug1: no match: SSH-2.0-billsSSH_3.6.3q3
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 192.168.103.126:2222 as 'root'
debug3: put_host_port: [192.168.103.126]:2222
debug3: hostkeys_foreach: reading file "/home/jonatan/.ssh/known_hosts"
debug3: record_hostkey: found key type RSA in file /home/jonatan/.ssh/known_hosts:7
debug3: load_hostkeys: loaded 1 keys from [192.168.103.126]:2222
debug3: order_hostkeyalgs: prefer hostkeyalgs: ssh-rsa-cert-v01@openssh.com,ssh-rsa
debug1: SSH2_MSG_KEXINIT sent
Bad packet length 167772161.
ssh_dispatch_run_fatal: Connection to 192.168.103.126: message authentication code incorrect

I use a fresh Fedora 23 installation .
Without this line (126 in main.c)

ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_BANNER, "SSH-2.0-billsSSH_3.6.3q3\r\n");

the honeypot work fine.

Regards Jonatan