/* NetworkManager -- Network link manager * * Matthew Garrett * * Heavily based on NetworkManagerRedhat.c by 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * (C) Copyright 2004 Tom Parker * (C) Copyright 2004 Matthew Garrett * (C) Copyright 2004 Red Hat, Inc. */ #include #include #include #include #include "NetworkManagerSystem.h" #include "NetworkManagerUtils.h" #include "NetworkManagerDevice.h" #include "interface_parser.h" #define ARPING "/usr/sbin/arping" /* * nm_system_init * * Initializes the distribution-specific system backend * */ void nm_system_init (void) { } /* * nm_system_device_flush_routes * * Flush all routes associated with a network device * */ void nm_system_device_flush_routes (NMDevice *dev) { char *buf; g_return_if_fail (dev != NULL); /* Not really applicable for test devices */ if (nm_device_is_test_device (dev)) return; /* Remove routing table entries */ buf = g_strdup_printf ("/sbin/ip route flush dev %s", nm_device_get_iface (dev)); nm_spawn_process (buf); g_free (buf); } /* * nm_system_device_add_default_route_via_device * * Add default route to the given device * */ void nm_system_device_add_default_route_via_device (NMDevice *dev) { char *buf; g_return_if_fail (dev != NULL); /* Not really applicable for test devices */ if (nm_device_is_test_device (dev)) return; /* Add default gateway */ buf = g_strdup_printf ("/sbin/ip route add default dev %s", nm_device_get_iface (dev)); nm_spawn_process (buf); g_free (buf); } /* * nm_system_device_flush_addresses * * Flush all network addresses associated with a network device * */ void nm_system_device_flush_addresses (NMDevice *dev) { char *buf; g_return_if_fail (dev != NULL); /* Not really applicable for test devices */ if (nm_device_is_test_device (dev)) return; /* Remove all IP addresses for a device */ buf = g_strdup_printf ("/sbin/ip address flush dev %s", nm_device_get_iface (dev)); nm_spawn_process (buf); g_free (buf); } /* * nm_system_device_setup_static_ip4_config * * Set up the device with a particular IPv4 address/netmask/gateway. * * Returns: TRUE on success * FALSE on error * */ gboolean nm_system_device_setup_static_ip4_config (NMDevice *dev) { #define IPBITS (sizeof (guint32) * 8) struct in_addr temp_addr; struct in_addr temp_addr2; char *s_tmp; char *s_tmp2; int i; guint32 addr; guint32 netmask; guint32 prefix = IPBITS; /* initialize with # bits in ipv4 address */ guint32 broadcast; char *buf; int err; const char *iface; g_return_val_if_fail (dev != NULL, FALSE); g_return_val_if_fail (!nm_device_config_get_use_dhcp (dev), FALSE); addr = nm_device_config_get_ip4_address (dev); netmask = nm_device_config_get_ip4_netmask (dev); iface = nm_device_get_iface (dev); broadcast = nm_device_config_get_ip4_broadcast (dev); /* get the prefix from the netmask */ for (i = 0; i < IPBITS; i++) { if (!(ntohl (netmask) & ((2 << i) - 1))) prefix--; } /* Calculate the broadcast address if the user didn't specify one */ if (!broadcast) broadcast = ((addr & (int)netmask) | ~(int)netmask); /* * Try and work out if someone else has our IP * using RFC 2131 Duplicate Address Detection */ temp_addr.s_addr = addr; buf = g_strdup_printf ("%s -q -D -c 1 -I %s %s",ARPING, iface, inet_ntoa (temp_addr)); if ((err = nm_spawn_process (buf))) { syslog (LOG_ERR, "Error: Duplicate address '%s' detected for " "device '%s' \n", iface, inet_ntoa (temp_addr)); goto error; } g_free (buf); /* set our IP address */ temp_addr.s_addr = addr; temp_addr2.s_addr = broadcast; s_tmp = g_strdup (inet_ntoa (temp_addr)); s_tmp2 = g_strdup (inet_ntoa (temp_addr2)); buf = g_strdup_printf ("/sbin/ip addr add %s/%d brd %s dev %s label %s", s_tmp, prefix, s_tmp2, iface, iface); g_free (s_tmp); g_free (s_tmp2); if ((err = nm_spawn_process (buf))) { syslog (LOG_ERR, "Error: could not set network configuration for " "device '%s' using command:\n '%s'", iface, buf); goto error; } g_free (buf); /* Alert other computers of our new address */ temp_addr.s_addr = addr; buf = g_strdup_printf ("%s -q -A -c 1 -I %s %s", ARPING,iface, inet_ntoa (temp_addr)); nm_spawn_process (buf); g_free (buf); g_usleep (G_USEC_PER_SEC * 2); buf = g_strdup_printf ("%s -q -U -c 1 -I %s %s", ARPING, iface, inet_ntoa (temp_addr)); nm_spawn_process (buf); g_free (buf); /* set the default route to be this device's gateway */ temp_addr.s_addr = nm_device_config_get_ip4_gateway (dev); buf = g_strdup_printf ("/sbin/ip route replace default via %s dev %s", inet_ntoa (temp_addr), iface); if ((err = nm_spawn_process (buf))) { syslog (LOG_ERR, "Error: could not set default route using " "command:\n '%s'", buf); goto error; } g_free (buf); return (TRUE); error: g_free (buf); nm_system_device_flush_addresses (dev); nm_system_device_flush_routes (dev); return (FALSE); } /* * nm_system_enable_loopback * * Bring up the loopback interface * */ void nm_system_enable_loopback (void) { nm_spawn_process ("/sbin/ifup lo"); } /* * nm_system_flush_loopback_routes * * Flush all routes associated with the loopback device, because it * sometimes gets the first route for ZeroConf/Link-Local traffic. * */ void nm_system_flush_loopback_routes (void) { nm_spawn_process ("/sbin/ip route flush dev lo"); } /* * nm_system_delete_default_route * * Remove the old default route in preparation for a new one * */ void nm_system_delete_default_route (void) { nm_spawn_process ("/sbin/ip route del default"); } /* * nm_system_flush_arp_cache * * Flush all entries in the arp cache. * */ void nm_system_flush_arp_cache (void) { nm_spawn_process ("/sbin/ip neigh flush all"); } /* * nm_system_kill_all_dhcp_daemons * * Kill all DHCP daemons currently running, done at startup. * */ void nm_system_kill_all_dhcp_daemons (void) { nm_spawn_process ("/usr/bin/killall -q dhclient"); } /* * nm_system_update_dns * * Make glibc/nscd aware of any changes to the resolv.conf file by * restarting nscd. * */ void nm_system_update_dns (void) { nm_spawn_process ("/usr/sbin/invoke-rc.d nscd restart"); } /* * nm_system_load_device_modules * * This is a null op - all our drivers should already be loaded. * */ void nm_system_load_device_modules (void) { return; } /* * nm_system_restart_mdns_responder * * Restart the multicast DNS responder so that it knows about new * network interfaces and IP addresses. * */ void nm_system_restart_mdns_responder (void) { nm_spawn_process ("/usr/bin/killall -q -USR1 mDNSResponder"); } /* * nm_system_device_update_config_info * * Retrieve any relevant configuration info for a particular device * from the system network configuration information. Clear out existing * info before setting stuff too. * */ void nm_system_device_update_config_info (NMDevice *dev) { gboolean use_dhcp = TRUE; guint32 ip4_address = 0; guint32 ip4_netmask = 0; guint32 ip4_gateway = 0; guint32 ip4_broadcast = 0; if_block *curr_device; const char *buf; g_return_if_fail (dev != NULL); /* We use DHCP on an interface unless told not to */ nm_device_config_set_use_dhcp (dev, TRUE); nm_device_config_set_ip4_address (dev, 0); nm_device_config_set_ip4_gateway (dev, 0); nm_device_config_set_ip4_netmask (dev, 0); nm_device_config_set_ip4_broadcast (dev, 0); ifparser_init(); /* Make sure this config file is for this device */ curr_device = ifparser_getif(nm_device_get_iface (dev)); if (curr_device == NULL) goto out; buf = ifparser_getkey(curr_device, "inet"); if (buf) { if (strcmp (buf, "dhcp")!=0) use_dhcp = FALSE; } buf = ifparser_getkey (curr_device, "address"); if (buf) ip4_address = inet_addr (buf); buf = ifparser_getkey (curr_device, "gateway"); if (buf) ip4_gateway = inet_addr (buf); buf = ifparser_getkey (curr_device, "netmask"); if (buf) ip4_netmask = inet_addr (buf); else { /* Make a default netmask if we have an IP address */ if (ip4_address) { if (((ntohl (ip4_address) & 0xFF000000) >> 24) <= 127) ip4_netmask = htonl (0xFF000000); else if (((ntohl (ip4_address) & 0xFF000000) >> 24) <= 191) ip4_netmask = htonl (0xFFFF0000); else ip4_netmask = htonl (0xFFFFFF00); } } buf = ifparser_getkey (curr_device, "broadcast"); if (buf) ip4_broadcast = inet_addr (buf); if (!use_dhcp && (!ip4_address || !ip4_gateway || !ip4_netmask)) { syslog (LOG_ERR, "Error: network configuration for device '%s' was invalid (non-DHCP configuration," " but no address/gateway specificed). Will use DHCP instead.\n", nm_device_get_iface (dev)); use_dhcp = TRUE; } /* If successful, set values on the device */ nm_device_config_set_use_dhcp (dev, use_dhcp); if (ip4_address) nm_device_config_set_ip4_address (dev, ip4_address); if (ip4_gateway) nm_device_config_set_ip4_gateway (dev, ip4_gateway); if (ip4_netmask) nm_device_config_set_ip4_netmask (dev, ip4_netmask); if (ip4_broadcast) nm_device_config_set_ip4_broadcast (dev, ip4_broadcast); #if 0 syslog (LOG_DEBUG, "------ Config (%s)", nm_device_get_iface (dev)); syslog (LOG_DEBUG, " DHCP=%d\n", use_dhcp); syslog (LOG_DEBUG, " ADDR=%d\n", ip4_address); syslog (LOG_DEBUG, " GW=%d\n", ip4_gateway); syslog (LOG_DEBUG, " NM=%d\n", ip4_netmask); syslog (LOG_DEBUG, "---------------------\n"); #endif out: ifparser_destroy(); }