diff options
Diffstat (limited to 'src/dhcp-manager/nm-dhcp-dhcpcd.c')
| -rw-r--r-- | src/dhcp-manager/nm-dhcp-dhcpcd.c | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/src/dhcp-manager/nm-dhcp-dhcpcd.c b/src/dhcp-manager/nm-dhcp-dhcpcd.c new file mode 100644 index 00000000..403431fc --- /dev/null +++ b/src/dhcp-manager/nm-dhcp-dhcpcd.c @@ -0,0 +1,294 @@ +/* -*- 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 <glib.h> +#include <glib/gi18n.h> +#include <dbus/dbus.h> +#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-dhcpcd.h" +#include "nm-utils.h" +#include "nm-logging.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); +} + +static GPid +real_ip4_start (NMDHCPClient *client, + NMSettingIP4Config *s_ip4, + guint8 *dhcp_anycast_addr) +{ + 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, *hostname; + + 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) "-c"); /* Set script file */ + g_ptr_array_add (argv, (gpointer) ACTION_SCRIPT_PATH ); + + hostname = nm_setting_ip4_config_get_dhcp_hostname (s_ip4); + 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, + gboolean info_only) +{ + nm_log_warn (LOGD_DHCP6, "the dhcpcd backend does not support IPv6."); + return -1; +} + +static void +real_stop (NMDHCPClient *client) +{ + NMDHCPDhcpcdPrivate *priv = NM_DHCP_DHCPCD_GET_PRIVATE (client); + + /* Chain up to parent */ + NM_DHCP_CLIENT_CLASS (nm_dhcp_dhcpcd_parent_class)->stop (client); + + if (priv->pid_file) + remove (priv->pid_file); +} + +static gboolean +real_ip4_process_classless_routes (NMDHCPClient *client, + GHashTable *options, + NMIP4Config *ip4_config, + guint32 *gwaddr) +{ + const char *str; + char **routes, **r; + gboolean have_routes = FALSE; + + /* Classless static routes over-ride any static routes and routers + * provided. We should also check for MS classless static routes as + * they implemented the draft RFC using their own code. + */ + str = g_hash_table_lookup (options, "new_classless_static_routes"); + if (!str) + str = g_hash_table_lookup (options, "new_ms_classless_static_routes"); + + if (!str || !strlen (str)) + return FALSE; + + routes = g_strsplit (str, " ", 0); + if (g_strv_length (routes) == 0) + goto out; + + if ((g_strv_length (routes) % 2) != 0) { + nm_log_warn (LOGD_DHCP4, " classless static routes provided, but invalid"); + goto out; + } + + for (r = routes; *r; r += 2) { + char *slash; + NMIP4Route *route; + int rt_cidr = 32; + struct in_addr rt_addr; + struct in_addr rt_route; + + slash = strchr(*r, '/'); + if (slash) { + *slash = '\0'; + errno = 0; + rt_cidr = strtol (slash + 1, NULL, 10); + if ((errno == EINVAL) || (errno == ERANGE)) { + nm_log_warn (LOGD_DHCP4, "DHCP provided invalid classless static route cidr: '%s'", slash + 1); + continue; + } + } + if (inet_pton (AF_INET, *r, &rt_addr) <= 0) { + nm_log_warn (LOGD_DHCP4, "DHCP provided invalid classless static route address: '%s'", *r); + continue; + } + if (inet_pton (AF_INET, *(r + 1), &rt_route) <= 0) { + nm_log_warn (LOGD_DHCP4, "DHCP provided invalid classless static route gateway: '%s'", *(r + 1)); + continue; + } + + have_routes = TRUE; + if (rt_cidr == 0 && rt_addr.s_addr == 0) { + /* FIXME: how to handle multiple routers? */ + *gwaddr = rt_addr.s_addr; + } else { + route = nm_ip4_route_new (); + nm_ip4_route_set_dest (route, (guint32) rt_addr.s_addr); + nm_ip4_route_set_prefix (route, rt_cidr); + nm_ip4_route_set_next_hop (route, (guint32) rt_route.s_addr); + + + nm_ip4_config_take_route (ip4_config, route); + nm_log_info (LOGD_DHCP4, " classless static route %s/%d gw %s", *r, rt_cidr, *(r + 1)); + } + } + +out: + g_strfreev (routes); + return have_routes; +} + +/***************************************************/ + +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; + client_class->ip4_process_classless_routes = real_ip4_process_classless_routes; +} + |