diff options
Diffstat (limited to 'src/dhcp-manager/nm-dhcp-utils.c')
| -rw-r--r-- | src/dhcp-manager/nm-dhcp-utils.c | 739 |
1 files changed, 0 insertions, 739 deletions
diff --git a/src/dhcp-manager/nm-dhcp-utils.c b/src/dhcp-manager/nm-dhcp-utils.c deleted file mode 100644 index 593d8c5d..00000000 --- a/src/dhcp-manager/nm-dhcp-utils.c +++ /dev/null @@ -1,739 +0,0 @@ -/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */ -/* 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. - * - * Copyright (C) 2005 - 2010 Red Hat, Inc. - * - */ - -#include "nm-default.h" - -#include <string.h> -#include <errno.h> -#include <unistd.h> -#include <arpa/inet.h> - -#include "nm-dhcp-utils.h" -#include "nm-utils.h" -#include "NetworkManagerUtils.h" -#include "nm-platform.h" -#include "nm-dhcp-client-logging.h" -#include "nm-core-internal.h" - -/********************************************/ - -static gboolean -ip4_process_dhcpcd_rfc3442_routes (const char *iface, - const char *str, - guint32 priority, - NMIP4Config *ip4_config, - guint32 *gwaddr) -{ - char **routes, **r; - gboolean have_routes = FALSE; - - routes = g_strsplit (str, " ", 0); - if (g_strv_length (routes) == 0) - goto out; - - if ((g_strv_length (routes) % 2) != 0) { - _LOG2W (LOGD_DHCP4, iface, " classless static routes provided, but invalid"); - goto out; - } - - for (r = routes; *r; r += 2) { - char *slash; - NMPlatformIP4Route route; - int rt_cidr = 32; - guint32 rt_addr, rt_route; - - slash = strchr(*r, '/'); - if (slash) { - *slash = '\0'; - errno = 0; - rt_cidr = strtol (slash + 1, NULL, 10); - if (errno || rt_cidr > 32) { - _LOG2W (LOGD_DHCP4, iface, "DHCP provided invalid classless static route cidr: '%s'", slash + 1); - continue; - } - } - if (inet_pton (AF_INET, *r, &rt_addr) <= 0) { - _LOG2W (LOGD_DHCP4, iface, "DHCP provided invalid classless static route address: '%s'", *r); - continue; - } - if (inet_pton (AF_INET, *(r + 1), &rt_route) <= 0) { - _LOG2W (LOGD_DHCP4, iface, "DHCP provided invalid classless static route gateway: '%s'", *(r + 1)); - continue; - } - - have_routes = TRUE; - if (rt_cidr == 0 && rt_addr == 0) { - /* FIXME: how to handle multiple routers? */ - *gwaddr = rt_route; - } else { - _LOG2I (LOGD_DHCP4, iface, " classless static route %s/%d gw %s", *r, rt_cidr, *(r + 1)); - memset (&route, 0, sizeof (route)); - route.network = rt_addr; - route.plen = rt_cidr; - route.gateway = rt_route; - route.rt_source = NM_IP_CONFIG_SOURCE_DHCP; - route.metric = priority; - nm_ip4_config_add_route (ip4_config, &route); - } - } - -out: - g_strfreev (routes); - return have_routes; -} - -static const char ** -process_dhclient_rfc3442_route (const char **octets, - NMPlatformIP4Route *route, - gboolean *success) -{ - const char **o = octets; - int addr_len = 0, i = 0; - long int tmp; - char *next_hop; - guint32 tmp_addr; - - *success = FALSE; - - if (!*o) - return o; /* no prefix */ - - tmp = strtol (*o, NULL, 10); - if (tmp < 0 || tmp > 32) /* 32 == max IP4 prefix length */ - return o; - - memset (route, 0, sizeof (*route)); - route->plen = tmp; - o++; - - if (tmp > 0) - addr_len = ((tmp - 1) / 8) + 1; - - /* ensure there's at least the address + next hop left */ - if (g_strv_length ((char **) o) < addr_len + 4) - goto error; - - if (tmp) { - const char *addr[4] = { "0", "0", "0", "0" }; - char *str_addr; - - for (i = 0; i < addr_len; i++) - addr[i] = *o++; - - str_addr = g_strjoin (".", addr[0], addr[1], addr[2], addr[3], NULL); - if (inet_pton (AF_INET, str_addr, &tmp_addr) <= 0) { - g_free (str_addr); - goto error; - } - g_free (str_addr); - tmp_addr &= nm_utils_ip4_prefix_to_netmask ((guint32) tmp); - route->network = tmp_addr; - } - - /* Handle next hop */ - next_hop = g_strjoin (".", o[0], o[1], o[2], o[3], NULL); - if (inet_pton (AF_INET, next_hop, &tmp_addr) <= 0) { - g_free (next_hop); - goto error; - } - route->gateway = tmp_addr; - g_free (next_hop); - - *success = TRUE; - return o + 4; /* advance to past the next hop */ - -error: - return o; -} - -static gboolean -ip4_process_dhclient_rfc3442_routes (const char *iface, - const char *str, - guint32 priority, - NMIP4Config *ip4_config, - guint32 *gwaddr) -{ - char **octets, **o; - gboolean have_routes = FALSE; - NMPlatformIP4Route route; - gboolean success; - - o = octets = g_strsplit_set (str, " .", 0); - if (g_strv_length (octets) < 5) { - _LOG2W (LOGD_DHCP4, iface, "ignoring invalid classless static routes '%s'", str); - goto out; - } - - while (*o) { - memset (&route, 0, sizeof (route)); - o = (char **) process_dhclient_rfc3442_route ((const char **) o, &route, &success); - if (!success) { - _LOG2W (LOGD_DHCP4, iface, "ignoring invalid classless static routes"); - break; - } - - have_routes = TRUE; - if (!route.plen) { - /* gateway passed as classless static route */ - *gwaddr = route.gateway; - } else { - char addr[INET_ADDRSTRLEN]; - - /* normal route */ - route.rt_source = NM_IP_CONFIG_SOURCE_DHCP; - route.metric = priority; - nm_ip4_config_add_route (ip4_config, &route); - - _LOG2I (LOGD_DHCP4, iface, " classless static route %s/%d gw %s", - nm_utils_inet4_ntop (route.network, addr), route.plen, - nm_utils_inet4_ntop (route.gateway, NULL)); - } - } - -out: - g_strfreev (octets); - return have_routes; -} - -static gboolean -ip4_process_classless_routes (const char *iface, - GHashTable *options, - guint32 priority, - NMIP4Config *ip4_config, - guint32 *gwaddr) -{ - const char *str, *p; - - g_return_val_if_fail (options != NULL, FALSE); - g_return_val_if_fail (ip4_config != NULL, FALSE); - - *gwaddr = 0; - - /* dhcpd/dhclient in Fedora has support for rfc3442 implemented using a - * slightly different format: - * - * option classless-static-routes = array of (destination-descriptor ip-address); - * - * which results in: - * - * 0 192.168.0.113 25.129.210.177.132 192.168.0.113 7.2 10.34.255.6 - * - * dhcpcd supports classless static routes natively and uses this same - * option identifier with the following format: - * - * 192.168.10.0/24 192.168.1.1 10.0.0.0/8 10.17.66.41 - */ - str = g_hash_table_lookup (options, "classless_static_routes"); - - /* dhclient doesn't have actual support for rfc3442 classless static routes - * upstream. Thus, people resort to defining the option in dhclient.conf - * and using arbitrary formats like so: - * - * option rfc3442-classless-static-routes code 121 = array of unsigned integer 8; - * - * See https://lists.isc.org/pipermail/dhcp-users/2008-December/007629.html - */ - if (!str) - str = g_hash_table_lookup (options, "rfc3442_classless_static_routes"); - - /* Microsoft version; same as rfc3442 but with a different option # (249) */ - if (!str) - str = g_hash_table_lookup (options, "ms_classless_static_routes"); - - if (!str || !strlen (str)) - return FALSE; - - p = str; - while (*p) { - if (!g_ascii_isdigit (*p) && (*p != ' ') && (*p != '.') && (*p != '/')) { - _LOG2W (LOGD_DHCP4, iface, "ignoring invalid classless static routes '%s'", str); - return FALSE; - } - p++; - }; - - if (strchr (str, '/')) { - /* dhcpcd format */ - return ip4_process_dhcpcd_rfc3442_routes (iface, str, priority, ip4_config, gwaddr); - } - - return ip4_process_dhclient_rfc3442_routes (iface, str, priority, ip4_config, gwaddr); -} - -static void -process_classful_routes (const char *iface, - GHashTable *options, - guint32 priority, - NMIP4Config *ip4_config) -{ - const char *str; - char **searches, **s; - - str = g_hash_table_lookup (options, "static_routes"); - if (!str) - return; - - searches = g_strsplit (str, " ", 0); - if ((g_strv_length (searches) % 2)) { - _LOG2I (LOGD_DHCP, iface, " static routes provided, but invalid"); - goto out; - } - - for (s = searches; *s; s += 2) { - NMPlatformIP4Route route; - guint32 rt_addr, rt_route; - - if (inet_pton (AF_INET, *s, &rt_addr) <= 0) { - _LOG2W (LOGD_DHCP, iface, "DHCP provided invalid static route address: '%s'", *s); - continue; - } - if (inet_pton (AF_INET, *(s + 1), &rt_route) <= 0) { - _LOG2W (LOGD_DHCP, iface, "DHCP provided invalid static route gateway: '%s'", *(s + 1)); - continue; - } - - // FIXME: ensure the IP address and route are sane - - memset (&route, 0, sizeof (route)); - route.network = rt_addr; - /* RFC 2132, updated by RFC 3442: - The Static Routes option (option 33) does not provide a subnet mask - for each route - it is assumed that the subnet mask is implicit in - whatever network number is specified in each route entry */ - route.plen = nm_utils_ip4_get_default_prefix (rt_addr); - if (rt_addr & ~nm_utils_ip4_prefix_to_netmask (route.plen)) { - /* RFC 943: target not "this network"; using host routing */ - route.plen = 32; - } - route.gateway = rt_route; - route.rt_source = NM_IP_CONFIG_SOURCE_DHCP; - route.metric = priority; - - nm_ip4_config_add_route (ip4_config, &route); - _LOG2I (LOGD_DHCP, iface, " static route %s", - nm_platform_ip4_route_to_string (&route, NULL, 0)); - } - -out: - g_strfreev (searches); -} - -static void -process_domain_search (const char *iface, - const char *str, - GFunc add_func, - gpointer user_data) -{ - char **searches, **s; - char *unescaped, *p; - int i; - - g_return_if_fail (str != NULL); - g_return_if_fail (add_func != NULL); - - p = unescaped = g_strdup (str); - do { - p = strstr (p, "\\032"); - if (!p) - break; - - /* Clear the escaped space with real spaces */ - for (i = 0; i < 4; i++) - *p++ = ' '; - } while (*p++); - - if (strchr (unescaped, '\\')) { - _LOG2W (LOGD_DHCP, iface, " invalid domain search: '%s'", unescaped); - goto out; - } - - searches = g_strsplit (unescaped, " ", 0); - for (s = searches; *s; s++) { - if (strlen (*s)) { - _LOG2I (LOGD_DHCP, iface, " domain search '%s'", *s); - add_func (*s, user_data); - } - } - g_strfreev (searches); - -out: - g_free (unescaped); -} - -static void -ip4_add_domain_search (gpointer data, gpointer user_data) -{ - nm_ip4_config_add_search (NM_IP4_CONFIG (user_data), (const char *) data); -} - -NMIP4Config * -nm_dhcp_utils_ip4_config_from_options (int ifindex, - const char *iface, - GHashTable *options, - guint32 priority) -{ - NMIP4Config *ip4_config = NULL; - guint32 tmp_addr; - in_addr_t addr; - NMPlatformIP4Address address; - char *str = NULL; - guint32 gwaddr = 0; - guint8 plen = 0; - - g_return_val_if_fail (options != NULL, NULL); - - ip4_config = nm_ip4_config_new (ifindex); - memset (&address, 0, sizeof (address)); - address.timestamp = nm_utils_get_monotonic_timestamp_s (); - - str = g_hash_table_lookup (options, "ip_address"); - if (str && (inet_pton (AF_INET, str, &addr) > 0)) - _LOG2I (LOGD_DHCP4, iface, " address %s", str); - else - goto error; - - str = g_hash_table_lookup (options, "subnet_mask"); - if (str && (inet_pton (AF_INET, str, &tmp_addr) > 0)) { - plen = nm_utils_ip4_netmask_to_prefix (tmp_addr); - _LOG2I (LOGD_DHCP4, iface, " plen %d (%s)", plen, str); - } else { - /* Get default netmask for the IP according to appropriate class. */ - plen = nm_utils_ip4_get_default_prefix (addr); - _LOG2I (LOGD_DHCP4, iface, " plen %d (default)", plen); - } - nm_platform_ip4_address_set_addr (&address, addr, plen); - - /* Routes: if the server returns classless static routes, we MUST ignore - * the 'static_routes' option. - */ - if (!ip4_process_classless_routes (iface, options, priority, ip4_config, &gwaddr)) - process_classful_routes (iface, options, priority, ip4_config); - - if (gwaddr) { - _LOG2I (LOGD_DHCP4, iface, " gateway %s", nm_utils_inet4_ntop (gwaddr, NULL)); - nm_ip4_config_set_gateway (ip4_config, gwaddr); - } else { - /* If the gateway wasn't provided as a classless static route with a - * subnet length of 0, try to find it using the old-style 'routers' option. - */ - str = g_hash_table_lookup (options, "routers"); - if (str) { - char **routers = g_strsplit (str, " ", 0); - char **s; - - for (s = routers; *s; s++) { - /* FIXME: how to handle multiple routers? */ - if (inet_pton (AF_INET, *s, &gwaddr) > 0) { - nm_ip4_config_set_gateway (ip4_config, gwaddr); - _LOG2I (LOGD_DHCP4, iface, " gateway %s", *s); - break; - } else - _LOG2W (LOGD_DHCP4, iface, "ignoring invalid gateway '%s'", *s); - } - g_strfreev (routers); - } - } - - /* - * RFC 2132, section 9.7 - * DHCP clients use the contents of the 'server identifier' field - * as the destination address for any DHCP messages unicast to - * the DHCP server. - * - * Some ISP's provide leases from central servers that are on - * different subnets that the address offered. If the host - * does not configure the interface as the default route, the - * dhcp server may not be reachable via unicast, and a host - * specific route is needed. - **/ - str = g_hash_table_lookup (options, "dhcp_server_identifier"); - if (str) { - if (inet_pton (AF_INET, str, &tmp_addr) > 0) { - - _LOG2I (LOGD_DHCP4, iface, " server identifier %s", str); - if ( nm_utils_ip4_address_clear_host_address(tmp_addr, address.plen) != nm_utils_ip4_address_clear_host_address(address.address, address.plen) - && !nm_ip4_config_get_direct_route_for_host (ip4_config, tmp_addr)) { - /* DHCP server not on assigned subnet and the no direct route was returned. Add route */ - NMPlatformIP4Route route = { 0 }; - - route.network = tmp_addr; - route.plen = 32; - /* this will be a device route if gwaddr is 0 */ - route.gateway = gwaddr; - route.rt_source = NM_IP_CONFIG_SOURCE_DHCP; - route.metric = priority; - nm_ip4_config_add_route (ip4_config, &route); - _LOG2D (LOGD_IP, iface, "adding route for server identifier: %s", - nm_platform_ip4_route_to_string (&route, NULL, 0)); - } - } - else - _LOG2W (LOGD_DHCP4, iface, "ignoring invalid server identifier '%s'", str); - } - - str = g_hash_table_lookup (options, "dhcp_lease_time"); - if (str) { - address.lifetime = address.preferred = strtoul (str, NULL, 10); - _LOG2I (LOGD_DHCP4, iface, " lease time %u", address.lifetime); - } - - address.addr_source = NM_IP_CONFIG_SOURCE_DHCP; - nm_ip4_config_add_address (ip4_config, &address); - - str = g_hash_table_lookup (options, "host_name"); - if (str) - _LOG2I (LOGD_DHCP4, iface, " hostname '%s'", str); - - str = g_hash_table_lookup (options, "domain_name_servers"); - if (str) { - char **dns = g_strsplit (str, " ", 0); - char **s; - - for (s = dns; *s; s++) { - if (inet_pton (AF_INET, *s, &tmp_addr) > 0) { - if (tmp_addr) { - nm_ip4_config_add_nameserver (ip4_config, tmp_addr); - _LOG2I (LOGD_DHCP4, iface, " nameserver '%s'", *s); - } - } else - _LOG2W (LOGD_DHCP4, iface, "ignoring invalid nameserver '%s'", *s); - } - g_strfreev (dns); - } - - str = g_hash_table_lookup (options, "domain_name"); - if (str) { - char **domains = g_strsplit (str, " ", 0); - char **s; - - for (s = domains; *s; s++) { - _LOG2I (LOGD_DHCP4, iface, " domain name '%s'", *s); - nm_ip4_config_add_domain (ip4_config, *s); - } - g_strfreev (domains); - } - - str = g_hash_table_lookup (options, "domain_search"); - if (str) - process_domain_search (iface, str, ip4_add_domain_search, ip4_config); - - str = g_hash_table_lookup (options, "netbios_name_servers"); - if (str) { - char **nbns = g_strsplit (str, " ", 0); - char **s; - - for (s = nbns; *s; s++) { - if (inet_pton (AF_INET, *s, &tmp_addr) > 0) { - if (tmp_addr) { - nm_ip4_config_add_wins (ip4_config, tmp_addr); - _LOG2I (LOGD_DHCP4, iface, " wins '%s'", *s); - } - } else - _LOG2W (LOGD_DHCP4, iface, "ignoring invalid WINS server '%s'", *s); - } - g_strfreev (nbns); - } - - str = g_hash_table_lookup (options, "interface_mtu"); - if (str) { - int int_mtu; - - errno = 0; - int_mtu = strtol (str, NULL, 10); - if ((errno == EINVAL) || (errno == ERANGE)) - goto error; - - if (int_mtu > 576) - nm_ip4_config_set_mtu (ip4_config, int_mtu, NM_IP_CONFIG_SOURCE_DHCP); - } - - str = g_hash_table_lookup (options, "nis_domain"); - if (str) { - _LOG2I (LOGD_DHCP4, iface, " NIS domain '%s'", str); - nm_ip4_config_set_nis_domain (ip4_config, str); - } - - str = g_hash_table_lookup (options, "nis_servers"); - if (str) { - char **nis = g_strsplit (str, " ", 0); - char **s; - - for (s = nis; *s; s++) { - if (inet_pton (AF_INET, *s, &tmp_addr) > 0) { - if (tmp_addr) { - nm_ip4_config_add_nis_server (ip4_config, tmp_addr); - _LOG2I (LOGD_DHCP4, iface, " nis '%s'", *s); - } - } else - _LOG2W (LOGD_DHCP4, iface, "ignoring invalid NIS server '%s'", *s); - } - g_strfreev (nis); - } - - str = g_hash_table_lookup (options, "vendor_encapsulated_options"); - nm_ip4_config_set_metered (ip4_config, str && strstr (str, "ANDROID_METERED")); - - return ip4_config; - -error: - g_object_unref (ip4_config); - return NULL; -} - -/********************************************/ - -static void -ip6_add_domain_search (gpointer data, gpointer user_data) -{ - nm_ip6_config_add_search (NM_IP6_CONFIG (user_data), (const char *) data); -} - -NMIP6Config * -nm_dhcp_utils_ip6_config_from_options (int ifindex, - const char *iface, - GHashTable *options, - guint32 priority, - gboolean info_only) -{ - NMIP6Config *ip6_config = NULL; - struct in6_addr tmp_addr; - NMPlatformIP6Address address; - char *str = NULL; - GHashTableIter iter; - gpointer key, value; - - g_return_val_if_fail (options != NULL, NULL); - - memset (&address, 0, sizeof (address)); - address.plen = 128; - address.timestamp = nm_utils_get_monotonic_timestamp_s (); - - g_hash_table_iter_init (&iter, options); - while (g_hash_table_iter_next (&iter, &key, &value)) { - _LOG2D (LOGD_DHCP6, iface, "(%s): option '%s'=>'%s'", - iface, (const char *) key, (const char *) value); - } - - ip6_config = nm_ip6_config_new (ifindex); - - str = g_hash_table_lookup (options, "max_life"); - if (str) { - address.lifetime = strtoul (str, NULL, 10); - _LOG2I (LOGD_DHCP6, iface, " valid_lft %u", address.lifetime); - } - - str = g_hash_table_lookup (options, "preferred_life"); - if (str) { - address.preferred = strtoul (str, NULL, 10); - _LOG2I (LOGD_DHCP6, iface, " preferred_lft %u", address.preferred); - } - - str = g_hash_table_lookup (options, "ip6_address"); - if (str) { - if (!inet_pton (AF_INET6, str, &tmp_addr)) { - _LOG2W (LOGD_DHCP6, iface, "(%s): DHCP returned invalid address '%s'", - iface, str); - goto error; - } - - address.address = tmp_addr; - address.addr_source = NM_IP_CONFIG_SOURCE_DHCP; - nm_ip6_config_add_address (ip6_config, &address); - _LOG2I (LOGD_DHCP6, iface, " address %s", str); - } else if (info_only == FALSE) { - /* No address in Managed mode is a hard error */ - goto error; - } - - str = g_hash_table_lookup (options, "host_name"); - if (str) - _LOG2I (LOGD_DHCP6, iface, " hostname '%s'", str); - - str = g_hash_table_lookup (options, "dhcp6_name_servers"); - if (str) { - char **dns = g_strsplit (str, " ", 0); - char **s; - - for (s = dns; *s; s++) { - if (inet_pton (AF_INET6, *s, &tmp_addr) > 0) { - if (!IN6_IS_ADDR_UNSPECIFIED (&tmp_addr)) { - nm_ip6_config_add_nameserver (ip6_config, &tmp_addr); - _LOG2I (LOGD_DHCP6, iface, " nameserver '%s'", *s); - } - } else - _LOG2W (LOGD_DHCP6, iface, "ignoring invalid nameserver '%s'", *s); - } - g_strfreev (dns); - } - - str = g_hash_table_lookup (options, "dhcp6_domain_search"); - if (str) - process_domain_search (iface, str, ip6_add_domain_search, ip6_config); - - return ip6_config; - -error: - g_object_unref (ip6_config); - return NULL; -} - -char * -nm_dhcp_utils_duid_to_string (const GByteArray *duid) -{ - g_return_val_if_fail (duid != NULL, NULL); - - return _nm_utils_bin2str (duid->data, duid->len, FALSE); -} - -/** - * nm_dhcp_utils_client_id_string_to_bytes: - * @client_id: the client ID string - * - * Accepts either a hex string ("aa:bb:cc") representing a binary client ID - * (the first byte is assumed to be the 'type' field per RFC 2132 section 9.14), - * or a string representing a non-hardware-address client ID, in which case - * the 'type' field is set to 0. - * - * Returns: the binary client ID suitable for sending over the wire - * to the DHCP server. - */ -GBytes * -nm_dhcp_utils_client_id_string_to_bytes (const char *client_id) -{ - GBytes *bytes = NULL; - guint len; - char *c; - - g_return_val_if_fail (client_id && client_id[0], NULL); - - /* Try as hex encoded */ - if (strchr (client_id, ':')) - bytes = nm_utils_hexstr2bin (client_id); - if (!bytes) { - /* Fall back to string */ - len = strlen (client_id); - c = g_malloc (len + 1); - c[0] = 0; /* type: non-hardware address per RFC 2132 section 9.14 */ - memcpy (c + 1, client_id, len); - bytes = g_bytes_new_take (c, len + 1); - } - - return bytes; -} - |