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)) nm_log_info (LOGD_DHCP4, " 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); nm_log_info (LOGD_DHCP4, " plen %d (%s)", plen, str); } else { /* Get default netmask for the IP according to appropriate class. */ plen = nm_utils_ip4_get_default_prefix (addr); nm_log_info (LOGD_DHCP4, " 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 (options, priority, ip4_config, &gwaddr)) process_classful_routes (options, priority, ip4_config); if (gwaddr) { nm_log_info (LOGD_DHCP4, " 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); nm_log_info (LOGD_DHCP4, " gateway %s", *s); break; } else nm_log_warn (LOGD_DHCP4, "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) { nm_log_info (LOGD_DHCP4, " 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.source = NM_IP_CONFIG_SOURCE_DHCP; route.metric = priority; nm_ip4_config_add_route (ip4_config, &route); nm_log_dbg (LOGD_IP, "adding route for server identifier: %s", nm_platform_ip4_route_to_string (&route, NULL, 0)); } } else nm_log_warn (LOGD_DHCP4, "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); nm_log_info (LOGD_DHCP4, " lease time %u", address.lifetime); } address.source = NM_IP_CONFIG_SOURCE_DHCP; nm_ip4_config_add_address (ip4_config, &address); str = g_hash_table_lookup (options, "host_name"); if (str) nm_log_info (LOGD_DHCP4, " 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); nm_log_info (LOGD_DHCP4, " nameserver '%s'", *s); } } else nm_log_warn (LOGD_DHCP4, "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++) { nm_log_info (LOGD_DHCP4, " 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 (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); nm_log_info (LOGD_DHCP4, " wins '%s'", *s); } } else nm_log_warn (LOGD_DHCP4, "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) { nm_log_info (LOGD_DHCP4, " 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); nm_log_info (LOGD_DHCP4, " nis '%s'", *s); } } else nm_log_warn (LOGD_DHCP4, "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 NMIP4Config * lease_to_ip4_config (const char *iface, int ifindex, sd_dhcp_lease *lease, GHashTable *options, guint32 default_priority, gboolean log_lease, GError **error) { NMIP4Config *ip4_config = NULL; struct in_addr tmp_addr; const struct in_addr *addr_list; char buf[INET_ADDRSTRLEN]; const char *str; guint32 lifetime = 0, i; NMPlatformIP4Address address; GString *l; gs_free sd_dhcp_route **routes = NULL; guint16 mtu; int r, num; guint64 end_time; const void *data; gsize data_len; gboolean metered = FALSE; gboolean static_default_gateway = FALSE; g_return_val_if_fail (lease != NULL, NULL); ip4_config = nm_ip4_config_new (ifindex); /* Address */ sd_dhcp_lease_get_address (lease, &tmp_addr); memset (&address, 0, sizeof (address)); address.address = tmp_addr.s_addr; address.peer_address = tmp_addr.s_addr; str = nm_utils_inet4_ntop (tmp_addr.s_addr, NULL); LOG_LEASE (LOGD_DHCP4, " address %s", str); add_option (options, dhcp4_requests, DHCP_OPTION_IP_ADDRESS, str); /* Prefix/netmask */ sd_dhcp_lease_get_netmask (lease, &tmp_addr); address.plen = nm_utils_ip4_netmask_to_prefix (tmp_addr.s_addr); LOG_LEASE (LOGD_DHCP4, " plen %d", address.plen); add_option (options, dhcp4_requests, SD_DHCP_OPTION_SUBNET_MASK, nm_utils_inet4_ntop (tmp_addr.s_addr, NULL)); /* Lease time */ sd_dhcp_lease_get_lifetime (lease, &lifetime); address.timestamp = nm_utils_get_monotonic_timestamp_s (); address.lifetime = address.preferred = lifetime; end_time = (guint64) time (NULL) + lifetime; LOG_LEASE (LOGD_DHCP4, " expires in %" G_GUINT32_FORMAT " seconds", lifetime); add_option_u64 (options, dhcp4_requests, SD_DHCP_OPTION_IP_ADDRESS_LEASE_TIME, end_time); address.addr_source = NM_IP_CONFIG_SOURCE_DHCP; nm_ip4_config_add_address (ip4_config, &address); /* DNS Servers */ num = sd_dhcp_lease_get_dns (lease, &addr_list); if (num > 0) { l = g_string_sized_new (30); for (i = 0; i < num; i++) { if (addr_list[i].s_addr) { nm_ip4_config_add_nameserver (ip4_config, addr_list[i].s_addr); str = nm_utils_inet4_ntop (addr_list[i].s_addr, NULL); LOG_LEASE (LOGD_DHCP4, " nameserver '%s'", str); g_string_append_printf (l, "%s%s", l->len ? " " : "", str); } } if (l->len) add_option (options, dhcp4_requests, SD_DHCP_OPTION_DOMAIN_NAME_SERVER, l->str); g_string_free (l, TRUE); } /* Domain Name */ r = sd_dhcp_lease_get_domainname (lease, &str); if (r == 0) { /* Multiple domains sometimes stuffed into option 15 "Domain Name". * As systemd escapes such characters, split them at \\032. */ char **domains = g_strsplit (str, "\\032", 0); char **s; for (s = domains; *s; s++) { LOG_LEASE (LOGD_DHCP4, " domain name '%s'", *s); nm_ip4_config_add_domain (ip4_config, *s); } g_strfreev (domains); add_option (options, dhcp4_requests, SD_DHCP_OPTION_DOMAIN_NAME, str); } /* Hostname */ r = sd_dhcp_lease_get_hostname (lease, &str); if (r == 0) { LOG_LEASE (LOGD_DHCP4, " hostname '%s'", str); add_option (options, dhcp4_requests, SD_DHCP_OPTION_HOST_NAME, str); } /* Routes */ num = sd_dhcp_lease_get_routes (lease, &routes); if (num > 0) { l = g_string_sized_new (30); for (i = 0; i < num; i++) { NMPlatformIP4Route route = { 0 }; const char *gw_str; guint8 plen; struct in_addr a; if (sd_dhcp_route_get_destination (routes[i], &a) < 0) continue; route.network = a.s_addr; if ( sd_dhcp_route_get_destination_prefix_length (routes[i], &plen) < 0 || plen > 32) continue; route.plen = plen; if (sd_dhcp_route_get_gateway (routes[i], &a) < 0) continue; route.gateway = a.s_addr; if (route.plen) { route.rt_source = NM_IP_CONFIG_SOURCE_DHCP; route.metric = default_priority; nm_ip4_config_add_route (ip4_config, &route); str = nm_utils_inet4_ntop (route.network, buf); gw_str = nm_utils_inet4_ntop (route.gateway, NULL); LOG_LEASE (LOGD_DHCP4, " static route %s/%d gw %s", str, route.plen, gw_str); g_string_append_printf (l, "%s%s/%d %s", l->len ? " " : "", str, route.plen, gw_str); } else { if (!static_default_gateway) { static_default_gateway = TRUE; nm_ip4_config_set_gateway (ip4_config, route.gateway); str = nm_utils_inet4_ntop (route.gateway, NULL); LOG_LEASE (LOGD_DHCP4, " gateway %s", str); add_option (options, dhcp4_requests, SD_DHCP_OPTION_ROUTER, str); } } } if (l->len) add_option (options, dhcp4_requests, SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE, l->str); g_string_free (l, TRUE); } /* If the DHCP server returns both a Classless Static Routes option and a * Router option, the DHCP client MUST ignore the Router option [RFC 3442]. * Be more lenient and ignore the Router option only if Classless Static * Routes contain a default gateway (as other DHCP backends do). */ /* Gateway */ if (!static_default_gateway) { r = sd_dhcp_lease_get_router (lease, &tmp_addr); if (r == 0) { nm_ip4_config_set_gateway (ip4_config, tmp_addr.s_addr); str = nm_utils_inet4_ntop (tmp_addr.s_addr, NULL); LOG_LEASE (LOGD_DHCP4, " gateway %s", str); add_option (options, dhcp4_requests, SD_DHCP_OPTION_ROUTER, str); } } /* MTU */ r = sd_dhcp_lease_get_mtu (lease, &mtu); if (r == 0 && mtu) { nm_ip4_config_set_mtu (ip4_config, mtu, NM_IP_CONFIG_SOURCE_DHCP); add_option_u32 (options, dhcp4_requests, SD_DHCP_OPTION_INTERFACE_MTU, mtu); LOG_LEASE (LOGD_DHCP4, " mtu %u", mtu); } /* NTP servers */ num = sd_dhcp_lease_get_ntp (lease, &addr_list); if (num > 0) { l = g_string_sized_new (30); for (i = 0; i < num; i++) { str = nm_utils_inet4_ntop (addr_list[i].s_addr, buf); LOG_LEASE (LOGD_DHCP4, " ntp server '%s'", str); g_string_append_printf (l, "%s%s", l->len ? " " : "", str); } add_option (options, dhcp4_requests, SD_DHCP_OPTION_NTP_SERVER, l->str); g_string_free (l, TRUE); } r = sd_dhcp_lease_get_vendor_specific (lease, &data, &data_len); if (r >= 0) metered = !!memmem (data, data_len, "ANDROID_METERED", NM_STRLEN ("ANDROID_METERED")); nm_ip4_config_set_metered (ip4_config, metered); return ip4_config; }
static NMIP4Config * lease_to_ip4_config (const char *iface, int ifindex, sd_dhcp_lease *lease, GHashTable *options, guint32 default_priority, gboolean log_lease, GError **error) { NMIP4Config *ip4_config = NULL; struct in_addr tmp_addr; const struct in_addr *addr_list; char buf[INET_ADDRSTRLEN]; const char *str; guint32 lifetime = 0, i; NMPlatformIP4Address address; GString *l; struct sd_dhcp_route *routes; guint16 mtu; int r, num; guint64 end_time; const void *data; gsize data_len; gboolean metered = FALSE; g_return_val_if_fail (lease != NULL, NULL); ip4_config = nm_ip4_config_new (ifindex); /* Address */ sd_dhcp_lease_get_address (lease, &tmp_addr); memset (&address, 0, sizeof (address)); address.address = tmp_addr.s_addr; address.peer_address = tmp_addr.s_addr; str = nm_utils_inet4_ntop (tmp_addr.s_addr, NULL); LOG_LEASE (LOGD_DHCP4, " address %s", str); add_option (options, dhcp4_requests, DHCP_OPTION_IP_ADDRESS, str); /* Prefix/netmask */ sd_dhcp_lease_get_netmask (lease, &tmp_addr); address.plen = nm_utils_ip4_netmask_to_prefix (tmp_addr.s_addr); LOG_LEASE (LOGD_DHCP4, " plen %d", address.plen); add_option (options, dhcp4_requests, DHCP_OPTION_SUBNET_MASK, nm_utils_inet4_ntop (tmp_addr.s_addr, NULL)); /* Lease time */ sd_dhcp_lease_get_lifetime (lease, &lifetime); address.timestamp = nm_utils_get_monotonic_timestamp_s (); address.lifetime = address.preferred = lifetime; end_time = (guint64) time (NULL) + lifetime; LOG_LEASE (LOGD_DHCP4, " expires in %" G_GUINT32_FORMAT " seconds", lifetime); add_option_u64 (options, dhcp4_requests, DHCP_OPTION_IP_ADDRESS_LEASE_TIME, end_time); address.source = NM_IP_CONFIG_SOURCE_DHCP; nm_ip4_config_add_address (ip4_config, &address); /* Gateway */ r = sd_dhcp_lease_get_router (lease, &tmp_addr); if (r == 0) { nm_ip4_config_set_gateway (ip4_config, tmp_addr.s_addr); str = nm_utils_inet4_ntop (tmp_addr.s_addr, NULL); LOG_LEASE (LOGD_DHCP4, " gateway %s", str); add_option (options, dhcp4_requests, DHCP_OPTION_ROUTER, str); } /* DNS Servers */ num = sd_dhcp_lease_get_dns (lease, &addr_list); if (num > 0) { l = g_string_sized_new (30); for (i = 0; i < num; i++) { if (addr_list[i].s_addr) { nm_ip4_config_add_nameserver (ip4_config, addr_list[i].s_addr); str = nm_utils_inet4_ntop (addr_list[i].s_addr, NULL); LOG_LEASE (LOGD_DHCP4, " nameserver '%s'", str); g_string_append_printf (l, "%s%s", l->len ? " " : "", str); } } if (l->len) add_option (options, dhcp4_requests, DHCP_OPTION_DOMAIN_NAME_SERVER, l->str); g_string_free (l, TRUE); } /* Domain Name */ r = sd_dhcp_lease_get_domainname (lease, &str); if (r == 0) { /* Multiple domains sometimes stuffed into the option */ char **domains = g_strsplit (str, " ", 0); char **s; for (s = domains; *s; s++) { LOG_LEASE (LOGD_DHCP4, " domain name '%s'", *s); nm_ip4_config_add_domain (ip4_config, *s); } g_strfreev (domains); add_option (options, dhcp4_requests, DHCP_OPTION_DOMAIN_NAME, str); } /* Hostname */ r = sd_dhcp_lease_get_hostname (lease, &str); if (r == 0) { LOG_LEASE (LOGD_DHCP4, " hostname '%s'", str); add_option (options, dhcp4_requests, DHCP_OPTION_HOST_NAME, str); } /* Routes */ num = sd_dhcp_lease_get_routes (lease, &routes); if (num > 0) { l = g_string_sized_new (30); for (i = 0; i < num; i++) { NMPlatformIP4Route route; const char *gw_str; memset (&route, 0, sizeof (route)); route.network = routes[i].dst_addr.s_addr; route.plen = routes[i].dst_prefixlen; route.gateway = routes[i].gw_addr.s_addr; route.source = NM_IP_CONFIG_SOURCE_DHCP; route.metric = default_priority; nm_ip4_config_add_route (ip4_config, &route); str = nm_utils_inet4_ntop (route.network, buf); gw_str = nm_utils_inet4_ntop (route.gateway, NULL); LOG_LEASE (LOGD_DHCP4, " static route %s/%d gw %s", str, route.plen, gw_str); g_string_append_printf (l, "%s%s/%d %s", l->len ? " " : "", str, route.plen, gw_str); } add_option (options, dhcp4_requests, DHCP_OPTION_RFC3442_ROUTES, l->str); g_string_free (l, TRUE); } /* MTU */ r = sd_dhcp_lease_get_mtu (lease, &mtu); if (r == 0 && mtu) { nm_ip4_config_set_mtu (ip4_config, mtu, NM_IP_CONFIG_SOURCE_DHCP); add_option_u32 (options, dhcp4_requests, DHCP_OPTION_INTERFACE_MTU, mtu); LOG_LEASE (LOGD_DHCP4, " mtu %u", mtu); } /* NTP servers */ num = sd_dhcp_lease_get_ntp (lease, &addr_list); if (num > 0) { l = g_string_sized_new (30); for (i = 0; i < num; i++) { str = nm_utils_inet4_ntop (addr_list[i].s_addr, buf); LOG_LEASE (LOGD_DHCP4, " ntp server '%s'", str); g_string_append_printf (l, "%s%s", l->len ? " " : "", str); } add_option (options, dhcp4_requests, DHCP_OPTION_NTP_SERVER, l->str); g_string_free (l, TRUE); } r = sd_dhcp_lease_get_vendor_specific (lease, &data, &data_len); if (r >= 0) metered = !!memmem (data, data_len, "ANDROID_METERED", STRLEN ("ANDROID_METERED")); nm_ip4_config_set_metered (ip4_config, metered); return ip4_config; }