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-rw-r--r--src/nm-iface-helper.c529
1 files changed, 529 insertions, 0 deletions
diff --git a/src/nm-iface-helper.c b/src/nm-iface-helper.c
new file mode 100644
index 0000000000..62f1b2aba4
--- /dev/null
+++ b/src/nm-iface-helper.c
@@ -0,0 +1,529 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
+/* NetworkManager -- Network link manager
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Copyright (C) 2014 Red Hat, Inc.
+ */
+
+#include <config.h>
+#include <glib.h>
+#include <glib-unix.h>
+#include <getopt.h>
+#include <locale.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <glib/gi18n.h>
+#include <string.h>
+#include <sys/resource.h>
+#include <sys/stat.h>
+#include <signal.h>
+
+#include "gsystem-local-alloc.h"
+#include "NetworkManagerUtils.h"
+#include "nm-linux-platform.h"
+#include "nm-dhcp-manager.h"
+#include "nm-logging.h"
+#include "main-utils.h"
+#include "nm-rdisc.h"
+#include "nm-lndp-rdisc.h"
+#include "nm-utils.h"
+
+#if !defined(NM_DIST_VERSION)
+# define NM_DIST_VERSION VERSION
+#endif
+
+#define NMIH_PID_FILE_FMT NMRUNDIR "/nm-iface-helper-%d.pid"
+
+static GMainLoop *main_loop = NULL;
+static char *ifname = NULL;
+static int ifindex = -1;
+static gboolean slaac_required = FALSE;
+static gboolean dhcp4_required = FALSE;
+static int tempaddr = NM_SETTING_IP6_CONFIG_PRIVACY_UNKNOWN;
+static int priority = -1;
+
+static void
+dhcp4_state_changed (NMDhcpClient *client,
+ NMDhcpState state,
+ NMIP4Config *ip4_config,
+ GHashTable *options,
+ gpointer user_data)
+{
+ static NMIP4Config *last_config = NULL;
+ NMIP4Config *existing;
+
+ g_return_if_fail (!ip4_config || NM_IS_IP4_CONFIG (ip4_config));
+
+ nm_log_dbg (LOGD_DHCP4, "(%s): new DHCPv4 client state %d", ifname, state);
+
+ switch (state) {
+ case NM_DHCP_STATE_BOUND:
+ g_assert (ip4_config);
+ existing = nm_ip4_config_capture (ifindex, FALSE);
+ if (last_config)
+ nm_ip4_config_subtract (existing, last_config);
+
+ nm_ip4_config_merge (existing, ip4_config);
+ if (!nm_ip4_config_commit (existing, ifindex))
+ nm_log_warn (LOGD_DHCP4, "(%s): failed to apply DHCPv4 config", ifname);
+
+ if (last_config) {
+ g_object_unref (last_config);
+ last_config = nm_ip4_config_new ();
+ nm_ip4_config_replace (last_config, ip4_config, NULL);
+ }
+ break;
+ case NM_DHCP_STATE_TIMEOUT:
+ case NM_DHCP_STATE_DONE:
+ case NM_DHCP_STATE_FAIL:
+ if (dhcp4_required) {
+ nm_log_warn (LOGD_DHCP4, "(%s): DHCPv4 timed out or failed, quitting...", ifname);
+ g_main_loop_quit (main_loop);
+ } else
+ nm_log_warn (LOGD_DHCP4, "(%s): DHCPv4 timed out or failed", ifname);
+ break;
+ default:
+ break;
+ }
+}
+
+static void
+rdisc_config_changed (NMRDisc *rdisc, NMRDiscConfigMap changed, gpointer user_data)
+{
+ static NMIP6Config *last_config = NULL;
+ NMIP6Config *existing;
+ NMIP6Config *ip6_config;
+ static int system_support = -1;
+ guint ifa_flags = 0x00;
+ int i;
+
+ if (system_support == -1) {
+ /*
+ * Check, if both libnl and the kernel are recent enough,
+ * to help user space handling RA. If it's not supported,
+ * we have no ipv6-privacy and must add autoconf addresses
+ * as /128. The reason for the /128 is to prevent the kernel
+ * from adding a prefix route for this address.
+ **/
+ system_support = nm_platform_check_support_libnl_extended_ifa_flags () &&
+ nm_platform_check_support_kernel_extended_ifa_flags ();
+ }
+
+ if (system_support)
+ ifa_flags = IFA_F_NOPREFIXROUTE;
+ if (tempaddr == NM_SETTING_IP6_CONFIG_PRIVACY_PREFER_TEMP_ADDR
+ || tempaddr == NM_SETTING_IP6_CONFIG_PRIVACY_PREFER_PUBLIC_ADDR)
+ {
+ /* without system_support, this flag will be ignored. Still set it, doesn't seem to do any harm. */
+ ifa_flags |= IFA_F_MANAGETEMPADDR;
+ }
+
+ ip6_config = nm_ip6_config_new ();
+
+ if (changed & NM_RDISC_CONFIG_GATEWAYS) {
+ /* Use the first gateway as ordered in router discovery cache. */
+ if (rdisc->gateways->len) {
+ NMRDiscGateway *gateway = &g_array_index (rdisc->gateways, NMRDiscGateway, 0);
+
+ nm_ip6_config_set_gateway (ip6_config, &gateway->address);
+ } else
+ nm_ip6_config_set_gateway (ip6_config, NULL);
+ }
+
+ if (changed & NM_RDISC_CONFIG_ADDRESSES) {
+ /* Rebuild address list from router discovery cache. */
+ nm_ip6_config_reset_addresses (ip6_config);
+
+ /* rdisc->addresses contains at most max_addresses entries.
+ * This is different from what the kernel does, which
+ * also counts static and temporary addresses when checking
+ * max_addresses.
+ **/
+ for (i = 0; i < rdisc->addresses->len; i++) {
+ NMRDiscAddress *discovered_address = &g_array_index (rdisc->addresses, NMRDiscAddress, i);
+ NMPlatformIP6Address address;
+
+ memset (&address, 0, sizeof (address));
+ address.address = discovered_address->address;
+ address.plen = system_support ? 64 : 128;
+ address.timestamp = discovered_address->timestamp;
+ address.lifetime = discovered_address->lifetime;
+ address.preferred = discovered_address->preferred;
+ if (address.preferred > address.lifetime)
+ address.preferred = address.lifetime;
+ address.source = NM_IP_CONFIG_SOURCE_RDISC;
+ address.flags = ifa_flags;
+
+ nm_ip6_config_add_address (ip6_config, &address);
+ }
+ }
+
+ if (changed & NM_RDISC_CONFIG_ROUTES) {
+ /* Rebuild route list from router discovery cache. */
+ nm_ip6_config_reset_routes (ip6_config);
+
+ for (i = 0; i < rdisc->routes->len; i++) {
+ NMRDiscRoute *discovered_route = &g_array_index (rdisc->routes, NMRDiscRoute, i);
+ NMPlatformIP6Route route;
+
+ /* Only accept non-default routes. The router has no idea what the
+ * local configuration or user preferences are, so sending routes
+ * with a prefix length of 0 is quite rude and thus ignored.
+ */
+ if (discovered_route->plen > 0) {
+ memset (&route, 0, sizeof (route));
+ route.network = discovered_route->network;
+ route.plen = discovered_route->plen;
+ route.gateway = discovered_route->gateway;
+ route.source = NM_IP_CONFIG_SOURCE_RDISC;
+ route.metric = priority;
+
+ nm_ip6_config_add_route (ip6_config, &route);
+ }
+ }
+ }
+
+ if (changed & NM_RDISC_CONFIG_DHCP_LEVEL) {
+ /* Unsupported until systemd DHCPv6 is ready */
+ }
+
+ /* hop_limit == 0 is a special value "unspecified", so do not touch
+ * in this case */
+ if (changed & NM_RDISC_CONFIG_HOP_LIMIT && rdisc->hop_limit > 0) {
+ char val[16];
+
+ g_snprintf (val, sizeof (val), "%d", rdisc->hop_limit);
+ nm_platform_sysctl_set (nm_utils_ip6_property_path (ifname, "hop_limit"), val);
+ }
+
+ if (changed & NM_RDISC_CONFIG_MTU) {
+ char val[16];
+
+ g_snprintf (val, sizeof (val), "%d", rdisc->mtu);
+ nm_platform_sysctl_set (nm_utils_ip6_property_path (ifname, "mtu"), val);
+ }
+
+ existing = nm_ip6_config_capture (ifindex, FALSE, tempaddr);
+ if (last_config)
+ nm_ip6_config_subtract (existing, last_config);
+
+ nm_ip6_config_merge (existing, ip6_config);
+ if (!nm_ip6_config_commit (existing, ifindex))
+ nm_log_warn (LOGD_IP6, "(%s): failed to apply IPv6 config", ifname);
+
+ if (last_config) {
+ g_object_unref (last_config);
+ last_config = nm_ip6_config_new ();
+ nm_ip6_config_replace (last_config, ip6_config, NULL);
+ }
+}
+
+static void
+rdisc_ra_timeout (NMRDisc *rdisc, gpointer user_data)
+{
+ if (slaac_required) {
+ nm_log_warn (LOGD_IP6, "(%s): IPv6 timed out or failed, quitting...", ifname);
+ g_main_loop_quit (main_loop);
+ } else
+ nm_log_warn (LOGD_IP6, "(%s): IPv6 timed out or failed", ifname);
+}
+
+static gboolean
+quit_handler (gpointer user_data)
+{
+ gboolean *quit_early_ptr = user_data;
+
+ *quit_early_ptr = TRUE;
+ g_main_loop_quit (main_loop);
+ return G_SOURCE_CONTINUE;
+}
+
+static void
+setup_signals (gboolean *quit_early_ptr)
+{
+ sigset_t sigmask;
+
+ sigemptyset (&sigmask);
+ pthread_sigmask (SIG_SETMASK, &sigmask, NULL);
+
+ signal (SIGPIPE, SIG_IGN);
+ g_unix_signal_add (SIGINT, quit_handler, quit_early_ptr);
+ g_unix_signal_add (SIGTERM, quit_handler, quit_early_ptr);
+}
+
+int
+main (int argc, char *argv[])
+{
+ char *opt_log_level = NULL;
+ char *opt_log_domains = NULL;
+ gboolean debug = FALSE, g_fatal_warnings = FALSE, become_daemon = FALSE;
+ gboolean show_version = FALSE, slaac = FALSE;
+ char *bad_domains = NULL, *dhcp4_hostname = NULL, *uuid = NULL;
+ char *iid_str = NULL, *dhcp4_clientid = NULL, *dhcp4_address = NULL;
+ gs_unref_object NMDhcpManager *dhcp_mgr = NULL;
+ GError *error = NULL;
+ gboolean wrote_pidfile = FALSE;
+ gs_free char *pidfile = NULL;
+ gboolean quit_early = FALSE;
+ gs_unref_object NMDhcpClient *dhcp4_client = NULL;
+ gs_unref_object NMRDisc *rdisc = NULL;
+ GByteArray *hwaddr = NULL;
+ size_t hwaddr_len = 0;
+ gconstpointer tmp;
+ gs_free NMUtilsIPv6IfaceId *iid = NULL;
+
+ GOptionEntry options[] = {
+ /* Interface/IP config */
+ { "ifname", 'i', 0, G_OPTION_ARG_STRING, &ifname, N_("The interface to manage"), N_("eth0") },
+ { "uuid", 'u', 0, G_OPTION_ARG_STRING, &uuid, N_("Connection UUID"), N_("661e8cd0-b618-46b8-9dc9-31a52baaa16b") },
+ { "slaac", 's', 0, G_OPTION_ARG_NONE, &slaac, N_("Whether to manage IPv6 SLAAC"), NULL },
+ { "slaac-required", '6', 0, G_OPTION_ARG_NONE, &slaac_required, N_("Whether SLAAC must be successful"), NULL },
+ { "slaac-tempaddr", 't', 0, G_OPTION_ARG_INT, &tempaddr, N_("Use an IPv6 temporary privacy address"), NULL },
+ { "dhcp4", 'd', 0, G_OPTION_ARG_STRING, &dhcp4_address, N_("Current DHCPv4 address"), NULL },
+ { "dhcp4-required", '4', 0, G_OPTION_ARG_NONE, &dhcp4_required, N_("Whether DHCPv4 must be successful"), NULL },
+ { "dhcp4-clientid", 'c', 0, G_OPTION_ARG_STRING, &dhcp4_clientid, N_("Hex-encoded DHCPv4 client ID"), NULL },
+ { "dhcp4-hostname", 'h', 0, G_OPTION_ARG_STRING, &dhcp4_hostname, N_("Hostname to send to DHCP server"), N_("barbar") },
+ { "priority", 'p', 0, G_OPTION_ARG_INT, &priority, N_("Route priority"), N_("10") },
+ { "iid", 'e', 0, G_OPTION_ARG_STRING, &iid_str, N_("Hex-encoded Interface Identifier"), N_("") },
+
+ /* Logging/debugging */
+ { "version", 'V', 0, G_OPTION_ARG_NONE, &show_version, N_("Print NetworkManager version and exit"), NULL },
+ { "no-daemon", 'n', G_OPTION_FLAG_REVERSE, G_OPTION_ARG_NONE, &become_daemon, N_("Don't become a daemon"), NULL },
+ { "debug", 'b', 0, G_OPTION_ARG_NONE, &debug, N_("Don't become a daemon, and log to stderr"), NULL },
+ { "log-level", 0, 0, G_OPTION_ARG_STRING, &opt_log_level, N_("Log level: one of [%s]"), "INFO" },
+ { "log-domains", 0, 0, G_OPTION_ARG_STRING, &opt_log_domains,
+ N_("Log domains separated by ',': any combination of [%s]"),
+ "PLATFORM,RFKILL,WIFI" },
+ { "g-fatal-warnings", 0, 0, G_OPTION_ARG_NONE, &g_fatal_warnings, N_("Make all warnings fatal"), NULL },
+ {NULL}
+ };
+
+ setpgid (getpid (), getpid ());
+
+ if (!nm_main_utils_early_setup ("nm-iface-helper",
+ &argv,
+ &argc,
+ options,
+ NULL,
+ _("nm-iface-helper is a small, standalone process that manages a single network interface.")))
+ exit (1);
+
+ if (show_version) {
+ fprintf (stdout, NM_DIST_VERSION "\n");
+ exit (0);
+ }
+
+ if (!ifname || !uuid) {
+ fprintf (stderr, _("An interface name and UUID are required\n"));
+ exit (1);
+ }
+
+ if (!nm_logging_setup (opt_log_level,
+ opt_log_domains,
+ &bad_domains,
+ &error)) {
+ fprintf (stderr,
+ _("%s. Please use --help to see a list of valid options.\n"),
+ error->message);
+ exit (1);
+ } else if (bad_domains) {
+ fprintf (stderr,
+ _("Ignoring unrecognized log domain(s) '%s' passed on command line.\n"),
+ bad_domains);
+ g_clear_pointer (&bad_domains, g_free);
+ }
+
+ pidfile = g_strdup_printf (NMIH_PID_FILE_FMT, ifindex);
+ g_assert (pidfile);
+
+ /* check pid file */
+ if (nm_main_utils_check_pidfile (pidfile, "nm-iface-helper"))
+ exit (1);
+
+ if (become_daemon && !debug) {
+ if (daemon (0, 0) < 0) {
+ int saved_errno;
+
+ saved_errno = errno;
+ fprintf (stderr, _("Could not daemonize: %s [error %u]\n"),
+ g_strerror (saved_errno),
+ saved_errno);
+ exit (1);
+ }
+ if (nm_main_utils_write_pidfile (pidfile))
+ wrote_pidfile = TRUE;
+ }
+
+ /* Set up unix signal handling - before creating threads, but after daemonizing! */
+ main_loop = g_main_loop_new (NULL, FALSE);
+ setup_signals (&quit_early);
+
+ if (g_fatal_warnings) {
+ GLogLevelFlags fatal_mask;
+
+ fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
+ fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
+ g_log_set_always_fatal (fatal_mask);
+ }
+
+ nm_logging_syslog_openlog (debug);
+
+#if !GLIB_CHECK_VERSION (2, 35, 0)
+ g_type_init ();
+#endif
+
+ nm_log_info (LOGD_CORE, "nm-iface-helper (version " NM_DIST_VERSION ") is starting...");
+
+ /* Set up platform interaction layer */
+ nm_linux_platform_setup ();
+
+ ifindex = nm_platform_link_get_ifindex (ifname);
+ if (ifindex <= 0) {
+ fprintf (stderr, _("Failed to find interface index for %s\n"), ifname);
+ exit (1);
+ }
+
+ tmp = nm_platform_link_get_address (ifindex, &hwaddr_len);
+ if (tmp) {
+ hwaddr = g_byte_array_sized_new (hwaddr_len);
+ g_byte_array_append (hwaddr, tmp, hwaddr_len);
+ }
+
+ if (iid_str) {
+ GBytes *bytes;
+ gsize ignored = 0;
+
+ bytes = nm_utils_hexstr2bin (iid_str);
+ if (!bytes || g_bytes_get_size (bytes) != sizeof (*iid)) {
+ fprintf (stderr, _("(%s): Invalid IID %s\n"), ifname, iid_str);
+ exit (1);
+ }
+ iid = g_bytes_unref_to_data (bytes, &ignored);
+ }
+
+ priority = MAX (0, priority);
+
+ if (dhcp4_address) {
+ nm_platform_sysctl_set (nm_utils_ip4_property_path (ifname, "promote_secondaries"), "1");
+
+ /* Initialize DHCP manager */
+ dhcp_mgr = nm_dhcp_manager_get ();
+ g_assert (dhcp_mgr != NULL);
+
+ dhcp4_client = nm_dhcp_manager_start_ip4 (dhcp_mgr,
+ ifname,
+ ifindex,
+ hwaddr,
+ uuid,
+ priority,
+ !!dhcp4_hostname,
+ dhcp4_hostname,
+ dhcp4_clientid,
+ 45,
+ NULL,
+ dhcp4_address);
+ g_assert (dhcp4_client);
+ g_signal_connect (dhcp4_client,
+ NM_DHCP_CLIENT_SIGNAL_STATE_CHANGED,
+ G_CALLBACK (dhcp4_state_changed),
+ NULL);
+ }
+
+ if (slaac) {
+ nm_platform_link_set_user_ipv6ll_enabled (ifindex, TRUE);
+
+ rdisc = nm_lndp_rdisc_new (ifindex, ifname);
+ g_assert (rdisc);
+
+ if (iid)
+ nm_rdisc_set_iid (rdisc, *iid);
+
+ nm_platform_sysctl_set (nm_utils_ip6_property_path (ifname, "accept_ra"), "1");
+ nm_platform_sysctl_set (nm_utils_ip6_property_path (ifname, "accept_ra_defrtr"), "0");
+ nm_platform_sysctl_set (nm_utils_ip6_property_path (ifname, "accept_ra_pinfo"), "0");
+ nm_platform_sysctl_set (nm_utils_ip6_property_path (ifname, "accept_ra_rtr_pref"), "0");
+
+ g_signal_connect (rdisc,
+ NM_RDISC_CONFIG_CHANGED,
+ G_CALLBACK (rdisc_config_changed),
+ NULL);
+ g_signal_connect (rdisc,
+ NM_RDISC_RA_TIMEOUT,
+ G_CALLBACK (rdisc_ra_timeout),
+ NULL);
+ nm_rdisc_start (rdisc);
+ }
+
+ if (!quit_early)
+ g_main_loop_run (main_loop);
+
+ g_clear_pointer (&hwaddr, g_byte_array_unref);
+
+ nm_logging_syslog_closelog ();
+
+ if (pidfile && wrote_pidfile)
+ unlink (pidfile);
+
+ nm_log_info (LOGD_CORE, "exiting");
+ exit (0);
+}
+
+/*******************************************************/
+/* Stub functions */
+
+gconstpointer nm_config_get (void);
+const char *nm_config_get_dhcp_client (gpointer unused);
+gboolean nm_config_get_configure_and_quit (gpointer unused);
+gconstpointer nm_dbus_manager_get (void);
+void nm_dbus_manager_register_exported_type (gpointer unused, GType gtype, gconstpointer unused2);
+void nm_dbus_manager_register_object (gpointer unused, const char *path, gpointer object);
+
+gconstpointer
+nm_config_get (void)
+{
+ return GUINT_TO_POINTER (1);
+}
+
+const char *
+nm_config_get_dhcp_client (gpointer unused)
+{
+ return "internal";
+}
+
+gboolean
+nm_config_get_configure_and_quit (gpointer unused)
+{
+ return TRUE;
+}
+
+gconstpointer
+nm_dbus_manager_get (void)
+{
+ return GUINT_TO_POINTER (1);
+}
+
+void
+nm_dbus_manager_register_exported_type (gpointer unused, GType gtype, gconstpointer unused2)
+{
+}
+
+void
+nm_dbus_manager_register_object (gpointer unused, const char *path, gpointer object)
+{
+}
+
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