/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */ /* nm-dhcp-dhcpcd.c - dhcpcd specific hooks for NetworkManager * * Copyright (C) 2008 Roy Marples * Copyright (C) 2010 Dan Williams * * 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, 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. * */ #include "config.h" #include #include #include #include #include #include #include #include "nm-default.h" #include "nm-dhcp-dhcpcd.h" #include "nm-dhcp-manager.h" #include "nm-utils.h" #include "NetworkManagerUtils.h" #include "nm-dhcp-listener.h" G_DEFINE_TYPE (NMDhcpDhcpcd, nm_dhcp_dhcpcd, NM_TYPE_DHCP_CLIENT) #define NM_DHCP_DHCPCD_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_DHCP_DHCPCD, NMDhcpDhcpcdPrivate)) typedef struct { char *pid_file; } NMDhcpDhcpcdPrivate; static const char * nm_dhcp_dhcpcd_get_path (void) { const char *path = NULL; if (WITH_DHCPCD) path = nm_utils_find_helper ("dhcpcd", DHCPCD_PATH, NULL); return path; } static gboolean ip4_start (NMDhcpClient *client, const char *dhcp_anycast_addr, const char *last_ip4_address) { NMDhcpDhcpcdPrivate *priv = NM_DHCP_DHCPCD_GET_PRIVATE (client); GPtrArray *argv = NULL; pid_t pid = -1; GError *error = NULL; char *pid_contents = NULL, *binary_name, *cmd_str; const char *iface, *dhcpcd_path, *hostname; g_return_val_if_fail (priv->pid_file == NULL, FALSE); iface = nm_dhcp_client_get_iface (client); /* dhcpcd does not allow custom pidfiles; the pidfile is always * RUNDIR "dhcpcd-.pid". */ priv->pid_file = g_strdup_printf (RUNDIR "/dhcpcd-%s.pid", iface); dhcpcd_path = nm_dhcp_dhcpcd_get_path (); if (!dhcpcd_path) { nm_log_warn (LOGD_DHCP4, "dhcpcd could not be found"); return FALSE; } /* Kill any existing dhcpcd from the pidfile */ binary_name = g_path_get_basename (dhcpcd_path); nm_dhcp_client_stop_existing (priv->pid_file, binary_name); g_free (binary_name); argv = g_ptr_array_new (); g_ptr_array_add (argv, (gpointer) dhcpcd_path); g_ptr_array_add (argv, (gpointer) "-B"); /* Don't background on lease (disable fork()) */ g_ptr_array_add (argv, (gpointer) "-K"); /* Disable built-in carrier detection */ g_ptr_array_add (argv, (gpointer) "-L"); /* Disable built-in IPv4LL */ /* --noarp. Don't request or claim the address by ARP; this also disables IPv4LL. */ g_ptr_array_add (argv, (gpointer) "-A"); g_ptr_array_add (argv, (gpointer) "-G"); /* Let NM handle routing */ g_ptr_array_add (argv, (gpointer) "-c"); /* Set script file */ g_ptr_array_add (argv, (gpointer) nm_dhcp_helper_path); #ifdef DHCPCD_SUPPORTS_IPV6 /* IPv4-only for now. NetworkManager knows better than dhcpcd when to * run IPv6, and dhcpcd's automatic Router Solicitations cause problems * with devices that don't expect them. */ g_ptr_array_add (argv, (gpointer) "-4"); #endif hostname = nm_dhcp_client_get_hostname (client); if (hostname) { g_ptr_array_add (argv, (gpointer) "-h"); /* Send hostname to DHCP server */ g_ptr_array_add (argv, (gpointer) hostname ); } g_ptr_array_add (argv, (gpointer) iface); g_ptr_array_add (argv, NULL); cmd_str = g_strjoinv (" ", (gchar **) argv->pdata); nm_log_dbg (LOGD_DHCP4, "running: %s", cmd_str); g_free (cmd_str); if (g_spawn_async (NULL, (char **) argv->pdata, NULL, G_SPAWN_DO_NOT_REAP_CHILD | G_SPAWN_STDOUT_TO_DEV_NULL | G_SPAWN_STDERR_TO_DEV_NULL, nm_utils_setpgid, NULL, &pid, &error)) { g_assert (pid > 0); nm_log_info (LOGD_DHCP4, "dhcpcd started with pid %d", pid); nm_dhcp_client_watch_child (client, pid); } else { nm_log_warn (LOGD_DHCP4, "dhcpcd failed to start. error: '%s'", error->message); g_error_free (error); } g_free (pid_contents); g_ptr_array_free (argv, TRUE); return pid > 0 ? TRUE : FALSE; } static gboolean ip6_start (NMDhcpClient *client, const char *dhcp_anycast_addr, gboolean info_only, NMSettingIP6ConfigPrivacy privacy, const GByteArray *duid) { nm_log_warn (LOGD_DHCP6, "the dhcpcd backend does not support IPv6."); return FALSE; } static void stop (NMDhcpClient *client, gboolean release, const GByteArray *duid) { NMDhcpDhcpcdPrivate *priv = NM_DHCP_DHCPCD_GET_PRIVATE (client); /* Chain up to parent */ NM_DHCP_CLIENT_CLASS (nm_dhcp_dhcpcd_parent_class)->stop (client, release, duid); if (priv->pid_file) { if (remove (priv->pid_file) == -1) nm_log_dbg (LOGD_DHCP, "Could not remove dhcp pid file \"%s\": %d (%s)", priv->pid_file, errno, g_strerror (errno)); } /* FIXME: implement release... */ } /***************************************************/ static void nm_dhcp_dhcpcd_init (NMDhcpDhcpcd *self) { g_signal_connect (nm_dhcp_listener_get (), NM_DHCP_LISTENER_EVENT, G_CALLBACK (nm_dhcp_client_handle_event), self); } static void dispose (GObject *object) { NMDhcpDhcpcdPrivate *priv = NM_DHCP_DHCPCD_GET_PRIVATE (object); g_signal_handlers_disconnect_by_func (nm_dhcp_listener_get (), G_CALLBACK (nm_dhcp_client_handle_event), NM_DHCP_DHCPCD (object)); g_free (priv->pid_file); G_OBJECT_CLASS (nm_dhcp_dhcpcd_parent_class)->dispose (object); } static void nm_dhcp_dhcpcd_class_init (NMDhcpDhcpcdClass *dhcpcd_class) { NMDhcpClientClass *client_class = NM_DHCP_CLIENT_CLASS (dhcpcd_class); GObjectClass *object_class = G_OBJECT_CLASS (dhcpcd_class); g_type_class_add_private (dhcpcd_class, sizeof (NMDhcpDhcpcdPrivate)); /* virtual methods */ object_class->dispose = dispose; client_class->ip4_start = ip4_start; client_class->ip6_start = ip6_start; client_class->stop = stop; } static void __attribute__((constructor)) register_dhcp_dhclient (void) { nm_g_type_init (); _nm_dhcp_client_register (NM_TYPE_DHCP_DHCPCD, "dhcpcd", nm_dhcp_dhcpcd_get_path, NULL); }