diff options
| -rw-r--r-- | libcli/nbt/nbtsocket.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/libcli/nbt/nbtsocket.c b/libcli/nbt/nbtsocket.c index 083cef96e8..68c5d89db6 100644 --- a/libcli/nbt/nbtsocket.c +++ b/libcli/nbt/nbtsocket.c @@ -234,6 +234,7 @@ static void nbt_name_socket_recv(struct nbt_name_socket *nbtsock) /* if this is a WACK response, this we need to go back to waiting, but perhaps increase the timeout */ if ((packet->operation & NBT_OPCODE) == NBT_OPCODE_WACK) { + uint32_t ttl; if (req->received_wack || packet->ancount < 1) { nbt_name_request_destructor(req); req->status = NT_STATUS_INVALID_NETWORK_RESPONSE; @@ -245,9 +246,23 @@ static void nbt_name_socket_recv(struct nbt_name_socket *nbtsock) has received our request */ req->num_retries = 0; req->received_wack = true; - /* although there can be a timeout in the packet, w2k3 screws it up, - so better to set it ourselves */ - req->timeout = lp_parm_int(global_loadparm, NULL, "nbt", "wack_timeout", 30); + /* + * there is a timeout in the packet, + * it is 5 + 4 * num_old_addresses + * + * although w2k3 screws it up + * and uses num_old_addresses = 0 + * + * so we better fallback to the maximum + * of num_old_addresses = 25 if we got + * a timeout of less than 9s (5 + 4*1) + * or more than 105s (5 + 4*25). + */ + ttl = packet->answers[0].ttl; + if ((ttl < (5 + 4*1)) || (ttl > (5 + 4*25))) { + ttl = 5 + 4*25; + } + req->timeout = ttl; req->te = event_add_timed(req->nbtsock->event_ctx, req, timeval_current_ofs(req->timeout, 0), nbt_name_socket_timeout, req); |