Ratan Gupta | 0f9dc1b | 2017-09-03 17:57:50 +0530 | [diff] [blame] | 1 | #include "rtnetlink_server.hpp" |
Patrick Venture | 189d44e | 2018-07-09 12:30:59 -0700 | [diff] [blame] | 2 | |
William A. Kennington III | 217bb3f | 2022-09-29 13:43:13 -0700 | [diff] [blame] | 3 | #include "types.hpp" |
| 4 | |
Ratan Gupta | 0f9dc1b | 2017-09-03 17:57:50 +0530 | [diff] [blame] | 5 | #include <linux/netlink.h> |
| 6 | #include <linux/rtnetlink.h> |
Patrick Venture | 189d44e | 2018-07-09 12:30:59 -0700 | [diff] [blame] | 7 | #include <netinet/in.h> |
Ratan Gupta | 0f9dc1b | 2017-09-03 17:57:50 +0530 | [diff] [blame] | 8 | |
Ratan Gupta | 0f9dc1b | 2017-09-03 17:57:50 +0530 | [diff] [blame] | 9 | #include <memory> |
William A. Kennington III | 32eef71 | 2022-01-24 17:03:03 -0800 | [diff] [blame] | 10 | #include <stdplus/fd/create.hpp> |
| 11 | #include <stdplus/fd/ops.hpp> |
William A. Kennington III | 0850579 | 2019-01-30 16:00:04 -0800 | [diff] [blame] | 12 | #include <string_view> |
Ratan Gupta | 0f9dc1b | 2017-09-03 17:57:50 +0530 | [diff] [blame] | 13 | |
| 14 | namespace phosphor |
| 15 | { |
| 16 | namespace network |
| 17 | { |
Ratan Gupta | a54d8f8 | 2017-09-08 17:05:46 +0530 | [diff] [blame] | 18 | |
William A. Kennington III | 3a70fa2 | 2018-09-20 18:48:20 -0700 | [diff] [blame] | 19 | extern std::unique_ptr<Timer> refreshObjectTimer; |
Ratan Gupta | a54d8f8 | 2017-09-08 17:05:46 +0530 | [diff] [blame] | 20 | |
Ratan Gupta | 0f9dc1b | 2017-09-03 17:57:50 +0530 | [diff] [blame] | 21 | namespace rtnetlink |
| 22 | { |
| 23 | |
William A. Kennington III | 0850579 | 2019-01-30 16:00:04 -0800 | [diff] [blame] | 24 | static bool shouldRefresh(const struct nlmsghdr& hdr, std::string_view data) |
William A. Kennington III | d2d0594 | 2019-01-30 16:04:11 -0800 | [diff] [blame] | 25 | { |
| 26 | switch (hdr.nlmsg_type) |
| 27 | { |
| 28 | case RTM_NEWADDR: |
| 29 | case RTM_DELADDR: |
William A. Kennington III | 00506d8 | 2019-02-01 21:51:41 -0800 | [diff] [blame] | 30 | case RTM_NEWROUTE: |
| 31 | case RTM_DELROUTE: |
William A. Kennington III | d2d0594 | 2019-01-30 16:04:11 -0800 | [diff] [blame] | 32 | { |
| 33 | return true; |
| 34 | } |
William A. Kennington III | 0850579 | 2019-01-30 16:00:04 -0800 | [diff] [blame] | 35 | case RTM_NEWNEIGH: |
| 36 | case RTM_DELNEIGH: |
| 37 | { |
| 38 | struct ndmsg ndm; |
| 39 | if (data.size() < sizeof(ndm)) |
| 40 | { |
| 41 | return false; |
| 42 | } |
| 43 | memcpy(&ndm, data.data(), sizeof(ndm)); |
| 44 | // We only want to refresh for static neighbors |
| 45 | return ndm.ndm_state & NUD_PERMANENT; |
| 46 | } |
William A. Kennington III | d2d0594 | 2019-01-30 16:04:11 -0800 | [diff] [blame] | 47 | } |
| 48 | |
| 49 | return false; |
| 50 | } |
| 51 | |
Ratan Gupta | 0f9dc1b | 2017-09-03 17:57:50 +0530 | [diff] [blame] | 52 | /* Call Back for the sd event loop */ |
William A. Kennington III | 217bb3f | 2022-09-29 13:43:13 -0700 | [diff] [blame] | 53 | static void eventHandler(sdeventplus::source::IO&, int fd, uint32_t) |
Ratan Gupta | 0f9dc1b | 2017-09-03 17:57:50 +0530 | [diff] [blame] | 54 | { |
William A. Kennington III | 217bb3f | 2022-09-29 13:43:13 -0700 | [diff] [blame] | 55 | std::array<char, BUFSIZE> buffer = {}; |
Gunnar Mills | 57d9c50 | 2018-09-14 14:42:34 -0500 | [diff] [blame] | 56 | int len{}; |
Ratan Gupta | 0f9dc1b | 2017-09-03 17:57:50 +0530 | [diff] [blame] | 57 | |
sureshvijayv1 | 205cc10 | 2021-09-22 13:05:22 +0530 | [diff] [blame] | 58 | auto netLinkHeader = reinterpret_cast<struct nlmsghdr*>(buffer.data()); |
| 59 | |
William A. Kennington III | 217bb3f | 2022-09-29 13:43:13 -0700 | [diff] [blame] | 60 | while ((len = recv(fd, netLinkHeader, buffer.size(), 0)) > 0) |
Ratan Gupta | 0f9dc1b | 2017-09-03 17:57:50 +0530 | [diff] [blame] | 61 | { |
| 62 | for (; (NLMSG_OK(netLinkHeader, len)) && |
| 63 | (netLinkHeader->nlmsg_type != NLMSG_DONE); |
Gunnar Mills | 57d9c50 | 2018-09-14 14:42:34 -0500 | [diff] [blame] | 64 | netLinkHeader = NLMSG_NEXT(netLinkHeader, len)) |
Ratan Gupta | 0f9dc1b | 2017-09-03 17:57:50 +0530 | [diff] [blame] | 65 | { |
William A. Kennington III | 0850579 | 2019-01-30 16:00:04 -0800 | [diff] [blame] | 66 | std::string_view data( |
| 67 | reinterpret_cast<const char*>(NLMSG_DATA(netLinkHeader)), |
| 68 | netLinkHeader->nlmsg_len - NLMSG_HDRLEN); |
| 69 | if (shouldRefresh(*netLinkHeader, data)) |
Ratan Gupta | 0f9dc1b | 2017-09-03 17:57:50 +0530 | [diff] [blame] | 70 | { |
Ratan Gupta | a54d8f8 | 2017-09-08 17:05:46 +0530 | [diff] [blame] | 71 | // starting the timer here to make sure that we don't want |
| 72 | // create the child objects multiple times. |
William A. Kennington III | cb500dc | 2018-12-03 15:32:12 -0800 | [diff] [blame] | 73 | if (!refreshObjectTimer->isEnabled()) |
Ratan Gupta | a54d8f8 | 2017-09-08 17:05:46 +0530 | [diff] [blame] | 74 | { |
Ratan Gupta | a54d8f8 | 2017-09-08 17:05:46 +0530 | [diff] [blame] | 75 | // if start timer throws exception then let the application |
| 76 | // crash |
William A. Kennington III | 3a70fa2 | 2018-09-20 18:48:20 -0700 | [diff] [blame] | 77 | refreshObjectTimer->restartOnce(refreshTimeout); |
Ratan Gupta | a54d8f8 | 2017-09-08 17:05:46 +0530 | [diff] [blame] | 78 | } // end if |
Gunnar Mills | 57d9c50 | 2018-09-14 14:42:34 -0500 | [diff] [blame] | 79 | } // end if |
Ratan Gupta | 0f9dc1b | 2017-09-03 17:57:50 +0530 | [diff] [blame] | 80 | |
| 81 | } // end for |
| 82 | |
sureshvijayv1 | 205cc10 | 2021-09-22 13:05:22 +0530 | [diff] [blame] | 83 | buffer.fill('\0'); |
| 84 | |
| 85 | netLinkHeader = reinterpret_cast<struct nlmsghdr*>(buffer.data()); |
Ratan Gupta | 0f9dc1b | 2017-09-03 17:57:50 +0530 | [diff] [blame] | 86 | } // end while |
Ratan Gupta | 0f9dc1b | 2017-09-03 17:57:50 +0530 | [diff] [blame] | 87 | } |
| 88 | |
William A. Kennington III | 32eef71 | 2022-01-24 17:03:03 -0800 | [diff] [blame] | 89 | static stdplus::ManagedFd makeSock() |
| 90 | { |
| 91 | using namespace stdplus::fd; |
| 92 | |
| 93 | auto sock = socket(SocketDomain::Netlink, SocketType::Raw, |
| 94 | static_cast<stdplus::fd::SocketProto>(NETLINK_ROUTE)); |
| 95 | |
| 96 | sock.fcntlSetfl(sock.fcntlGetfl().set(FileFlag::NonBlock)); |
| 97 | |
| 98 | sockaddr_nl local{}; |
| 99 | local.nl_family = AF_NETLINK; |
| 100 | local.nl_groups = RTMGRP_IPV4_IFADDR | RTMGRP_IPV6_IFADDR | |
| 101 | RTMGRP_IPV4_ROUTE | RTMGRP_IPV6_ROUTE | RTMGRP_NEIGH; |
| 102 | bind(sock, local); |
| 103 | |
| 104 | return sock; |
| 105 | } |
| 106 | |
William A. Kennington III | 217bb3f | 2022-09-29 13:43:13 -0700 | [diff] [blame] | 107 | Server::Server(sdeventplus::Event& event) : |
| 108 | sock(makeSock()), io(event, sock.get(), EPOLLIN | EPOLLET, eventHandler) |
Ratan Gupta | 0f9dc1b | 2017-09-03 17:57:50 +0530 | [diff] [blame] | 109 | { |
Ratan Gupta | 0f9dc1b | 2017-09-03 17:57:50 +0530 | [diff] [blame] | 110 | } |
| 111 | |
Gunnar Mills | 57d9c50 | 2018-09-14 14:42:34 -0500 | [diff] [blame] | 112 | } // namespace rtnetlink |
| 113 | } // namespace network |
| 114 | } // namespace phosphor |