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nic_router: use DHCP parameter request list

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Send a list of the expected options with the DHCP DISCOVER and REQUEST
when acting as DHCP client.

Fixes #2738
This commit is contained in:
Martin Stein 2018-04-06 17:34:01 +02:00 committed by Christian Helmuth
parent ca1751528d
commit fa59dc0a5b
1 changed files with 28 additions and 5 deletions
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33
repos/os/src/server/nic_router/dhcp_client.cc
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@ -18,12 +18,37 @@
#include <configuration.h>
#include <size_guard.h>
enum { PKT_SIZE = 1024 };
using namespace Genode;
using namespace Net;
using Message_type = Dhcp_packet::Message_type;
using Drop_packet_inform = Net::Interface::Drop_packet_inform;
using Size_guard = Size_guard_tpl<PKT_SIZE, Net::Interface::Send_buffer_too_small>;
using Dhcp_options = Dhcp_packet::Options_aggregator<Size_guard>;
/***************
** Utilities **
***************/
void append_param_req_list(Dhcp_options &dhcp_opts)
{
dhcp_opts.append_param_req_list([&] (Dhcp_options::Parameter_request_list_data &data) {
data.append_param_req<Dhcp_packet::Message_type_option>();
data.append_param_req<Dhcp_packet::Server_ipv4>();
data.append_param_req<Dhcp_packet::Ip_lease_time>();
data.append_param_req<Dhcp_packet::Dns_server_ipv4>();
data.append_param_req<Dhcp_packet::Subnet_mask>();
data.append_param_req<Dhcp_packet::Router_ipv4>();
});
}
/*****************
** Dhcp_client **
*****************/
Configuration &Dhcp_client::_config() { return _domain().config(); };
@ -175,8 +200,6 @@ void Dhcp_client::_send(Message_type msg_type,
Ipv4_address server_ip,
Ipv4_address requested_ip)
{
enum { PKT_SIZE = 1024 };
using Size_guard = Size_guard_tpl<PKT_SIZE, Interface::Send_buffer_too_small>;
Mac_address client_mac = _interface.router_mac();
_interface.send(PKT_SIZE, [&] (void *pkt_base) {
@ -233,17 +256,17 @@ void Dhcp_client::_send(Message_type msg_type,
dhcp.default_magic_cookie();
/* append DHCP option fields to the request */
Dhcp_packet::Options_aggregator<Size_guard>
dhcp_opts(dhcp, size);
Dhcp_options dhcp_opts(dhcp, size);
dhcp_opts.append_option<Dhcp_packet::Message_type_option>(msg_type);
switch (msg_type) {
case Message_type::DISCOVER:
append_param_req_list(dhcp_opts);
dhcp_opts.append_option<Dhcp_packet::Client_id>(client_mac);
dhcp_opts.append_option<Dhcp_packet::Max_msg_size>(PKT_SIZE - dhcp_off);
break;
case Message_type::REQUEST:
append_param_req_list(dhcp_opts);
dhcp_opts.append_option<Dhcp_packet::Client_id>(client_mac);
dhcp_opts.append_option<Dhcp_packet::Max_msg_size>(PKT_SIZE - dhcp_off);
if (_state == State::REQUEST) {