diff options
Diffstat (limited to 'src/dhcp/nm-dhcp-dhcpcd.c')
| -rw-r--r-- | src/dhcp/nm-dhcp-dhcpcd.c | 265 |
1 files changed, 265 insertions, 0 deletions
diff --git a/src/dhcp/nm-dhcp-dhcpcd.c b/src/dhcp/nm-dhcp-dhcpcd.c new file mode 100644 index 00000000..c8643881 --- /dev/null +++ b/src/dhcp/nm-dhcp-dhcpcd.c @@ -0,0 +1,265 @@ +/* -*- 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 <dcbw@redhat.com> + * + * 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 "nm-default.h" + +#if WITH_DHCPCD + +#include <string.h> +#include <stdlib.h> +#include <errno.h> +#include <unistd.h> +#include <stdio.h> +#include <netinet/in.h> +#include <arpa/inet.h> + +#include "nm-dhcp-manager.h" +#include "nm-utils.h" +#include "NetworkManagerUtils.h" +#include "nm-dhcp-listener.h" +#include "nm-dhcp-client-logging.h" + +/*****************************************************************************/ + +#define NM_TYPE_DHCP_DHCPCD (nm_dhcp_dhcpcd_get_type ()) +#define NM_DHCP_DHCPCD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), NM_TYPE_DHCP_DHCPCD, NMDhcpDhcpcd)) +#define NM_DHCP_DHCPCD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), NM_TYPE_DHCP_DHCPCD, NMDhcpDhcpcdClass)) +#define NM_IS_DHCP_DHCPCD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), NM_TYPE_DHCP_DHCPCD)) +#define NM_IS_DHCP_DHCPCD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), NM_TYPE_DHCP_DHCPCD)) +#define NM_DHCP_DHCPCD_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), NM_TYPE_DHCP_DHCPCD, NMDhcpDhcpcdClass)) + +typedef struct _NMDhcpDhcpcd NMDhcpDhcpcd; +typedef struct _NMDhcpDhcpcdClass NMDhcpDhcpcdClass; + +static GType nm_dhcp_dhcpcd_get_type (void); + +/*****************************************************************************/ + +typedef struct { + char *pid_file; + NMDhcpListener *dhcp_listener; +} NMDhcpDhcpcdPrivate; + +struct _NMDhcpDhcpcd { + NMDhcpClient parent; + NMDhcpDhcpcdPrivate _priv; +}; + +struct _NMDhcpDhcpcdClass { + NMDhcpClientClass parent; +}; + +G_DEFINE_TYPE (NMDhcpDhcpcd, nm_dhcp_dhcpcd, NM_TYPE_DHCP_CLIENT) + +#define NM_DHCP_DHCPCD_GET_PRIVATE(self) _NM_GET_PRIVATE (self, NMDhcpDhcpcd, NM_IS_DHCP_DHCPCD) + +/*****************************************************************************/ + +static const char * +nm_dhcp_dhcpcd_get_path (void) +{ + return nm_utils_find_helper ("dhcpcd", DHCPCD_PATH, NULL); +} + +static gboolean +ip4_start (NMDhcpClient *client, const char *dhcp_anycast_addr, const char *last_ip4_address) +{ + NMDhcpDhcpcd *self = NM_DHCP_DHCPCD (client); + NMDhcpDhcpcdPrivate *priv = NM_DHCP_DHCPCD_GET_PRIVATE (self); + GPtrArray *argv = NULL; + pid_t pid = -1; + GError *error = NULL; + char *pid_contents = NULL, *binary_name, *cmd_str, *dot; + const char *iface, *dhcpcd_path, *hostname, *fqdn; + gs_free char *prefix = NULL; + + 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-<ifname>.pid". + */ + priv->pid_file = g_strdup_printf (RUNDIR "/dhcpcd-%s.pid", iface); + + dhcpcd_path = nm_dhcp_dhcpcd_get_path (); + if (!dhcpcd_path) { + _LOGW ("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); + fqdn = nm_dhcp_client_get_fqdn (client); + + if (fqdn) { + g_ptr_array_add (argv, (gpointer) "-h"); + g_ptr_array_add (argv, (gpointer) fqdn); + g_ptr_array_add (argv, (gpointer) "-F"); + g_ptr_array_add (argv, (gpointer) "both"); + } else if (hostname) { + prefix = strdup (hostname); + dot = strchr (prefix, '.'); + /* get rid of the domain */ + if (dot) + *dot = '\0'; + + g_ptr_array_add (argv, (gpointer) "-h"); /* Send hostname to DHCP server */ + g_ptr_array_add (argv, (gpointer) prefix); + } + + g_ptr_array_add (argv, (gpointer) iface); + g_ptr_array_add (argv, NULL); + + cmd_str = g_strjoinv (" ", (gchar **) argv->pdata); + _LOGD ("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); + _LOGI ("dhcpcd started with pid %d", pid); + nm_dhcp_client_watch_child (client, pid); + } else { + _LOGW ("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, + const struct in6_addr *ll_addr, + gboolean info_only, + NMSettingIP6ConfigPrivacy privacy, + const GByteArray *duid, + guint needed_prefixes) +{ + NMDhcpDhcpcd *self = NM_DHCP_DHCPCD (client); + + _LOGW ("the dhcpcd backend does not support IPv6"); + return FALSE; +} + +static void +stop (NMDhcpClient *client, gboolean release, const GByteArray *duid) +{ + NMDhcpDhcpcd *self = NM_DHCP_DHCPCD (client); + NMDhcpDhcpcdPrivate *priv = NM_DHCP_DHCPCD_GET_PRIVATE (self); + + /* 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) + _LOGD ("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) +{ + NMDhcpDhcpcdPrivate *priv = NM_DHCP_DHCPCD_GET_PRIVATE (self); + + priv->dhcp_listener = g_object_ref (nm_dhcp_listener_get ()); + g_signal_connect (priv->dhcp_listener, + NM_DHCP_LISTENER_EVENT, + G_CALLBACK (nm_dhcp_client_handle_event), + self); +} + +static void +dispose (GObject *object) +{ + NMDhcpDhcpcdPrivate *priv = NM_DHCP_DHCPCD_GET_PRIVATE ((NMDhcpDhcpcd *) object); + + if (priv->dhcp_listener) { + g_signal_handlers_disconnect_by_func (priv->dhcp_listener, + G_CALLBACK (nm_dhcp_client_handle_event), + NM_DHCP_DHCPCD (object)); + g_clear_object (&priv->dhcp_listener); + } + + nm_clear_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); + + object_class->dispose = dispose; + + client_class->ip4_start = ip4_start; + client_class->ip6_start = ip6_start; + client_class->stop = stop; +} + +const NMDhcpClientFactory _nm_dhcp_client_factory_dhcpcd = { + .name = "dhcpcd", + .get_type = nm_dhcp_dhcpcd_get_type, + .get_path = nm_dhcp_dhcpcd_get_path, + .get_lease_ip_configs = NULL, +}; + +#endif /* WITH_DHCPCD */ |