/* -*- 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 #include #include #include #include #include #include #include #include #include #include "nm-dhcp-dhcpcd.h" #include "nm-utils.h" #include "nm-logging.h" #include "nm-posix-signals.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)) #define ACTION_SCRIPT_PATH LIBEXECDIR "/nm-dhcp-client.action" typedef struct { const char *path; char *pid_file; } NMDHCPDhcpcdPrivate; const char * nm_dhcp_dhcpcd_get_path (const char *try_first) { static const char *dhcpcd_paths[] = { "/sbin/dhcpcd", "/usr/sbin/dhcpcd", "/usr/pkg/sbin/dhcpcd", "/usr/local/sbin/dhcpcd", NULL }; const char **path = dhcpcd_paths; if (strlen (try_first) && g_file_test (try_first, G_FILE_TEST_EXISTS)) return try_first; while (*path != NULL) { if (g_file_test (*path, G_FILE_TEST_EXISTS)) break; path++; } return *path; } GSList * nm_dhcp_dhcpcd_get_lease_config (const char *iface, const char *uuid) { return NULL; } static void dhcpcd_child_setup (gpointer user_data G_GNUC_UNUSED) { /* We are in the child process at this point */ pid_t pid = getpid (); setpgid (pid, pid); /* * We blocked signals in main(). We need to restore original signal * mask for dhcpcd here so that it can receive signals. */ nm_unblock_posix_signals (NULL); } static GPid real_ip4_start (NMDHCPClient *client, NMSettingIP4Config *s_ip4, guint8 *dhcp_anycast_addr, const char *hostname) { NMDHCPDhcpcdPrivate *priv = NM_DHCP_DHCPCD_GET_PRIVATE (client); GPtrArray *argv = NULL; GPid pid = -1; GError *error = NULL; char *pid_contents = NULL, *binary_name, *cmd_str; const char *iface, *uuid; g_return_val_if_fail (priv->pid_file == NULL, -1); iface = nm_dhcp_client_get_iface (client); uuid = nm_dhcp_client_get_uuid (client); priv->pid_file = g_strdup_printf (LOCALSTATEDIR "/run/dhcpcd-%s.pid", iface); if (!priv->pid_file) { nm_log_warn (LOGD_DHCP4, "(%s): not enough memory for dhcpcd options.", iface); return -1; } if (!g_file_test (priv->path, G_FILE_TEST_EXISTS)) { nm_log_warn (LOGD_DHCP4, "%s does not exist.", priv->path); return -1; } /* Kill any existing dhcpcd from the pidfile */ binary_name = g_path_get_basename (priv->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) priv->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 since we use avahi-autoipd */ 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) ACTION_SCRIPT_PATH ); if (hostname && strlen (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, &dhcpcd_child_setup, NULL, &pid, &error)) { nm_log_warn (LOGD_DHCP4, "dhcpcd failed to start. error: '%s'", error->message); g_error_free (error); pid = -1; } else nm_log_info (LOGD_DHCP4, "dhcpcd started with pid %d", pid); g_free (pid_contents); g_ptr_array_free (argv, TRUE); return pid; } static GPid real_ip6_start (NMDHCPClient *client, NMSettingIP6Config *s_ip6, guint8 *dhcp_anycast_addr, const char *hostname, gboolean info_only) { nm_log_warn (LOGD_DHCP6, "the dhcpcd backend does not support IPv6."); return -1; } static void real_stop (NMDHCPClient *client, gboolean release) { NMDHCPDhcpcdPrivate *priv = NM_DHCP_DHCPCD_GET_PRIVATE (client); /* Chain up to parent */ NM_DHCP_CLIENT_CLASS (nm_dhcp_dhcpcd_parent_class)->stop (client, release); if (priv->pid_file) remove (priv->pid_file); /* FIXME: implement release... */ } /***************************************************/ static void nm_dhcp_dhcpcd_init (NMDHCPDhcpcd *self) { NMDHCPDhcpcdPrivate *priv = NM_DHCP_DHCPCD_GET_PRIVATE (self); priv->path = nm_dhcp_dhcpcd_get_path (DHCPCD_PATH); } static void dispose (GObject *object) { NMDHCPDhcpcdPrivate *priv = NM_DHCP_DHCPCD_GET_PRIVATE (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 = real_ip4_start; client_class->ip6_start = real_ip6_start; client_class->stop = real_stop; }