Ratan Gupta | 0f9dc1b | 2017-09-03 17:57:50 +0530 | [diff] [blame] | 1 | #include "xyz/openbmc_project/Common/error.hpp" |
| 2 | #include "rtnetlink_server.hpp" |
| 3 | #include "types.hpp" |
| 4 | #include "util.hpp" |
| 5 | |
| 6 | |
| 7 | #include <netinet/in.h> |
| 8 | #include <linux/netlink.h> |
| 9 | #include <linux/rtnetlink.h> |
| 10 | #include <net/if.h> |
| 11 | #include <sys/types.h> |
| 12 | #include <systemd/sd-daemon.h> |
| 13 | #include <unistd.h> |
| 14 | |
| 15 | #include <phosphor-logging/log.hpp> |
| 16 | #include <phosphor-logging/elog-errors.hpp> |
| 17 | |
| 18 | #include <memory> |
| 19 | #include <iostream> |
| 20 | |
| 21 | namespace phosphor |
| 22 | { |
| 23 | namespace network |
| 24 | { |
| 25 | namespace rtnetlink |
| 26 | { |
| 27 | |
| 28 | /* Call Back for the sd event loop */ |
| 29 | static int eventHandler(sd_event_source* es, int fd, uint32_t revents, |
| 30 | void* userdata) |
| 31 | { |
| 32 | char buffer[phosphor::network::rtnetlink::BUFSIZE] {}; |
| 33 | int len {}; |
| 34 | |
| 35 | auto netLinkHeader = reinterpret_cast<struct nlmsghdr*>(buffer); |
| 36 | while ((len = recv(fd, netLinkHeader, |
| 37 | phosphor::network::rtnetlink::BUFSIZE, 0)) > 0) |
| 38 | { |
| 39 | for (; (NLMSG_OK(netLinkHeader, len)) && |
| 40 | (netLinkHeader->nlmsg_type != NLMSG_DONE); |
| 41 | netLinkHeader = NLMSG_NEXT(netLinkHeader, len)) |
| 42 | { |
| 43 | if (netLinkHeader->nlmsg_type == RTM_NEWADDR || |
| 44 | netLinkHeader->nlmsg_type == RTM_DELADDR) |
| 45 | { |
| 46 | // TODO delete the below trace in later commit. |
| 47 | std::cout << "Address Changed\n"; |
| 48 | |
| 49 | } // end if |
| 50 | |
| 51 | } // end for |
| 52 | |
| 53 | } // end while |
| 54 | |
| 55 | return 0; |
| 56 | } |
| 57 | |
| 58 | |
| 59 | int Server::run() |
| 60 | { |
| 61 | using namespace phosphor::logging; |
| 62 | |
| 63 | struct sockaddr_nl addr {}; |
| 64 | |
| 65 | int fd = -1; |
| 66 | phosphor::Descriptor smartSock(fd); |
| 67 | |
| 68 | int r {}; |
| 69 | |
| 70 | sigset_t ss {}; |
| 71 | |
| 72 | |
| 73 | if (sigemptyset(&ss) < 0 || sigaddset(&ss, SIGTERM) < 0 || |
| 74 | sigaddset(&ss, SIGINT) < 0) |
| 75 | { |
| 76 | r = -errno; |
| 77 | goto finish; |
| 78 | } |
| 79 | /* Block SIGTERM first, so that the event loop can handle it */ |
| 80 | if (sigprocmask(SIG_BLOCK, &ss, NULL) < 0) |
| 81 | { |
| 82 | r = -errno; |
| 83 | goto finish; |
| 84 | } |
| 85 | |
| 86 | /* Let's make use of the default handler and "floating" |
| 87 | reference features of sd_event_add_signal() */ |
| 88 | |
| 89 | r = sd_event_add_signal(eventPtr.get(), NULL, SIGTERM, NULL, NULL); |
| 90 | if (r < 0) |
| 91 | { |
| 92 | goto finish; |
| 93 | } |
| 94 | |
| 95 | r = sd_event_add_signal(eventPtr.get(), NULL, SIGINT, NULL, NULL); |
| 96 | if (r < 0) |
| 97 | { |
| 98 | goto finish; |
| 99 | } |
| 100 | |
| 101 | fd = socket(PF_NETLINK, SOCK_RAW | SOCK_NONBLOCK, NETLINK_ROUTE); |
| 102 | if (fd < 0) |
| 103 | { |
| 104 | r = -errno; |
| 105 | goto finish; |
| 106 | } |
| 107 | |
| 108 | smartSock.set(fd); |
| 109 | fd = -1; |
| 110 | |
| 111 | memset(&addr, 0, sizeof(addr)); |
| 112 | addr.nl_family = AF_NETLINK; |
| 113 | addr.nl_groups = RTMGRP_IPV4_IFADDR; |
| 114 | |
| 115 | if (bind(smartSock(), (struct sockaddr*)&addr, sizeof(addr)) < 0) |
| 116 | { |
| 117 | r = -errno; |
| 118 | goto finish; |
| 119 | } |
| 120 | |
| 121 | r = sd_event_add_io(eventPtr.get(), nullptr, |
| 122 | smartSock(), EPOLLIN, eventHandler, nullptr); |
| 123 | if (r < 0) |
| 124 | { |
| 125 | goto finish; |
| 126 | } |
| 127 | |
| 128 | r = sd_event_loop(eventPtr.get()); |
| 129 | |
| 130 | finish: |
| 131 | |
| 132 | if (r < 0) |
| 133 | { |
| 134 | log<level::ERR>("Failure Occured in starting of server:", |
| 135 | entry("errno = %d", errno)); |
| 136 | } |
| 137 | |
| 138 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
| 139 | } |
| 140 | |
| 141 | |
| 142 | } //rtnetlink |
| 143 | } //network |
| 144 | } //phosphor |