1 // Copyright 2022 Google LLC
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include "file-io.hpp"
16
17 #include <sdeventplus/event.hpp>
18 #include <sdeventplus/source/io.hpp>
19 #include <stdplus/fd/create.hpp>
20 #include <stdplus/fd/ops.hpp>
21 #include <stdplus/print.hpp>
22
23 using namespace std::string_view_literals;
24
25 // A privileged port that is reserved for querying BMC DHCP completion.
26 // This is well known by the clients querying the status.
27 constexpr uint16_t kListenPort = 23;
28
createListener()29 stdplus::ManagedFd createListener()
30 {
31 using namespace stdplus::fd;
32 auto sock =
33 socket(SocketDomain::INet6, SocketType::Stream, SocketProto::TCP);
34 setFileFlags(sock, getFileFlags(sock).set(stdplus::fd::FileFlag::NonBlock));
35 sockaddr_in6 addr = {};
36 addr.sin6_family = AF_INET6;
37 addr.sin6_port = htons(kListenPort);
38 bind(sock, addr);
39 listen(sock, 10);
40 return sock;
41 }
42
main()43 int main()
44 {
45 try
46 {
47 auto listener = createListener();
48 auto event = sdeventplus::Event::get_default();
49 sdeventplus::source::IO do_accept(
50 event, listener.get(), EPOLLIN | EPOLLET,
51 [&](sdeventplus::source::IO&, int, uint32_t) {
52 while (auto fd = stdplus::fd::accept(listener))
53 {
54 std::string data;
55 try
56 {
57 data = fileRead(statusFile);
58 }
59 catch (const std::exception& e)
60 {
61 // we don't want to fail the upgrade process, set the
62 // status to ONGOING
63 data.push_back(2);
64 data.append("Failed to read status ");
65 data.append(e.what());
66 }
67
68 stdplus::fd::sendExact(*fd, data,
69 stdplus::fd::SendFlags(0));
70 }
71 });
72 return event.loop();
73 }
74 catch (const std::exception& e)
75 {
76 stdplus::println(stderr, "Failed: {}", e.what());
77 return 1;
78 }
79 }
80