/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright (C) 2014 Tom Gundersen <teg@jklm.no> systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <errno.h> #include <linux/veth.h> #include <net/if.h> #include <stdlib.h> #include <unistd.h> #include <sched.h> #include "sd-event.h" #include "sd-netlink.h" #include "sd-pppoe.h" #include "event-util.h" #include "process-util.h" #include "util.h" static void pppoe_handler(sd_pppoe *ppp, int event, void *userdata) { static int pppoe_state = -1; sd_event *e = userdata; assert_se(ppp); assert_se(e); switch (event) { case SD_PPPOE_EVENT_RUNNING: assert_se(pppoe_state == -1); log_info("running"); break; case SD_PPPOE_EVENT_STOPPED: assert_se(pppoe_state == SD_PPPOE_EVENT_RUNNING); log_info("stopped"); assert_se(sd_event_exit(e, 0) >= 0); break; default: assert_not_reached("invalid pppoe event"); } pppoe_state = event; } static int client_run(const char *client_name, sd_event *e) { sd_pppoe *pppoe; int client_ifindex; client_ifindex = (int) if_nametoindex(client_name); assert_se(client_ifindex > 0); assert_se(sd_pppoe_new(&pppoe) >= 0); assert_se(sd_pppoe_attach_event(pppoe, e, 0) >= 0); assert_se(sd_pppoe_set_ifname(pppoe, "pppoe-client") >= 0); assert_se(sd_pppoe_set_ifindex(pppoe, client_ifindex) >= 0); assert_se(sd_pppoe_set_callback(pppoe, pppoe_handler, e) >= 0); log_info("starting PPPoE client, it will exit when the server times out and sends PADT"); assert_se(sd_pppoe_start(pppoe) >= 0); assert_se(sd_event_loop(e) >= 0); assert_se(!sd_pppoe_unref(pppoe)); return EXIT_SUCCESS; } static int test_pppoe_server(sd_event *e) { sd_netlink *rtnl; sd_netlink_message *m; pid_t pid; int r, client_ifindex, server_ifindex; r = unshare(CLONE_NEWNET); if (r < 0 && errno == EPERM) return EXIT_TEST_SKIP; assert_se(r >= 0); assert_se(sd_netlink_open(&rtnl) >= 0); assert_se(sd_netlink_attach_event(rtnl, e, 0) >= 0); assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_NEWLINK, 0) >= 0); assert_se(sd_netlink_message_append_string(m, IFLA_IFNAME, "pppoe-server") >= 0); assert_se(sd_netlink_message_open_container(m, IFLA_LINKINFO) >= 0); assert_se(sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, "veth") >= 0); assert_se(sd_netlink_message_open_container(m, VETH_INFO_PEER) >= 0); assert_se(sd_netlink_message_append_string(m, IFLA_IFNAME, "pppoe-client") >= 0); assert_se(sd_netlink_message_close_container(m) >= 0); assert_se(sd_netlink_message_close_container(m) >= 0); assert_se(sd_netlink_message_close_container(m) >= 0); assert_se(sd_netlink_call(rtnl, m, 0, NULL) >= 0); client_ifindex = (int) if_nametoindex("pppoe-client"); assert_se(client_ifindex > 0); server_ifindex = (int) if_nametoindex("pppoe-server"); assert_se(server_ifindex > 0); m = sd_netlink_message_unref(m); assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_SETLINK, client_ifindex) >= 0); assert_se(sd_rtnl_message_link_set_flags(m, IFF_UP, IFF_UP) >= 0); assert_se(sd_netlink_call(rtnl, m, 0, NULL) >= 0); m = sd_netlink_message_unref(m); assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_SETLINK, server_ifindex) >= 0); assert_se(sd_rtnl_message_link_set_flags(m, IFF_UP, IFF_UP) >= 0); assert_se(sd_netlink_call(rtnl, m, 0, NULL) >= 0); pid = fork(); assert_se(pid >= 0); if (pid == 0) { /* let the client send some discover messages before the server is started */ sleep(2); /* TODO: manage pppoe-server-options */ execlp("pppoe-server", "pppoe-server", "-F", "-I", "pppoe-server", "-C", "Test-AC", "-S", "Service-Default", "-S", "Service-First-Auxiliary", "-S", "Service-Second-Auxiliary", NULL); assert_not_reached("failed to execute pppoe-server. not installed?"); } client_run("pppoe-client", e); assert_se(kill(pid, SIGTERM) >= 0); assert_se(wait_for_terminate(pid, NULL) >= 0); assert_se(!sd_netlink_message_unref(m)); assert_se(!sd_netlink_unref(rtnl)); return EXIT_SUCCESS; } int main(int argc, char *argv[]) { _cleanup_event_unref_ sd_event *e = NULL; log_set_max_level(LOG_DEBUG); log_parse_environment(); log_open(); assert_se(sd_event_new(&e) >= 0); if (argc == 1) { log_info("running PPPoE client against local server"); return test_pppoe_server(e); } else if (argc == 2) { log_info("running PPPoE client over '%s'", argv[1]); return client_run(argv[1], e); } else { log_error("This program takes one or no arguments.\n" "\t %s [<ifname>]", program_invocation_short_name); return EXIT_FAILURE; } }