diff options
Diffstat (limited to 'src/n-dhcp4/src/n-dhcp4-c-connection.c')
| -rw-r--r-- | src/n-dhcp4/src/n-dhcp4-c-connection.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/n-dhcp4/src/n-dhcp4-c-connection.c b/src/n-dhcp4/src/n-dhcp4-c-connection.c index 4aba97393d..2f660e3b30 100644 --- a/src/n-dhcp4/src/n-dhcp4-c-connection.c +++ b/src/n-dhcp4/src/n-dhcp4-c-connection.c @@ -705,6 +705,7 @@ int n_dhcp4_c_connection_select_new(NDhcp4CConnection *connection, message->userdata.start_time = offer->userdata.start_time; message->userdata.base_time = offer->userdata.base_time; message->userdata.client_addr = client.s_addr; + message->userdata.server_id = server.s_addr; n_dhcp4_incoming_get_xid(offer, &xid); n_dhcp4_outgoing_set_xid(message, xid); @@ -1224,6 +1225,24 @@ int n_dhcp4_c_connection_dispatch_io(NDhcp4CConnection *connection, serv_addr, sizeof(serv_addr))); } + if (type == N_DHCP4_MESSAGE_NAK && + connection->request->userdata.server_id != INADDR_ANY) { + struct in_addr server; + + r = n_dhcp4_incoming_query_server_identifier(message, &server); + if (r) + return N_DHCP4_E_AGAIN; + + if (connection->request->userdata.server_id != server.s_addr) { + n_dhcp4_log(connection->log_queue, + LOG_DEBUG, + "discarded NAK with wrong server-id %s", + inet_ntop(AF_INET, &server, + serv_addr, sizeof(serv_addr))); + return N_DHCP4_E_AGAIN; + } + } + switch (type) { case N_DHCP4_MESSAGE_OFFER: case N_DHCP4_MESSAGE_ACK: |