diff options
Diffstat (limited to 'src/dhcp/nm-dhcp-systemd.c')
| -rw-r--r-- | src/dhcp/nm-dhcp-systemd.c | 625 |
1 files changed, 373 insertions, 252 deletions
diff --git a/src/dhcp/nm-dhcp-systemd.c b/src/dhcp/nm-dhcp-systemd.c index 5c60af5f..70ed8715 100644 --- a/src/dhcp/nm-dhcp-systemd.c +++ b/src/dhcp/nm-dhcp-systemd.c @@ -18,9 +18,7 @@ #include "nm-default.h" -#include <string.h> #include <stdlib.h> -#include <errno.h> #include <unistd.h> #include <stdio.h> #include <netinet/in.h> @@ -98,63 +96,77 @@ G_DEFINE_TYPE (NMDhcpSystemd, nm_dhcp_systemd, NM_TYPE_DHCP_CLIENT) #define DHCP6_OPTION_IAID 1034 typedef struct { - guint num; const char *name; - gboolean include; + uint16_t option_num; + bool include; } ReqOption; #define REQPREFIX "requested_" +#define REQ(_num, _name, _include) \ + { \ + .name = REQPREFIX""_name, \ + .option_num = _num, \ + .include = _include, \ + } + static const ReqOption dhcp4_requests[] = { - { SD_DHCP_OPTION_SUBNET_MASK, REQPREFIX "subnet_mask", TRUE }, - { SD_DHCP_OPTION_TIME_OFFSET, REQPREFIX "time_offset", TRUE }, - { SD_DHCP_OPTION_ROUTER, REQPREFIX "routers", TRUE }, - { SD_DHCP_OPTION_DOMAIN_NAME_SERVER, REQPREFIX "domain_name_servers", TRUE }, - { SD_DHCP_OPTION_HOST_NAME, REQPREFIX "host_name", TRUE }, - { SD_DHCP_OPTION_DOMAIN_NAME, REQPREFIX "domain_name", TRUE }, - { SD_DHCP_OPTION_INTERFACE_MTU, REQPREFIX "interface_mtu", TRUE }, - { SD_DHCP_OPTION_BROADCAST, REQPREFIX "broadcast_address", TRUE }, - { SD_DHCP_OPTION_STATIC_ROUTE, REQPREFIX "static_routes", TRUE }, - { DHCP_OPTION_NIS_DOMAIN, REQPREFIX "nis_domain", TRUE }, - { DHCP_OPTION_NIS_SERVERS, REQPREFIX "nis_servers", TRUE }, - { SD_DHCP_OPTION_NTP_SERVER, REQPREFIX "ntp_servers", TRUE }, - { SD_DHCP_OPTION_SERVER_IDENTIFIER, REQPREFIX "dhcp_server_identifier", TRUE }, - { SD_DHCP_OPTION_DOMAIN_SEARCH_LIST, REQPREFIX "domain_search", TRUE }, - { SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE, REQPREFIX "rfc3442_classless_static_routes", TRUE }, - { SD_DHCP_OPTION_PRIVATE_CLASSLESS_STATIC_ROUTE, REQPREFIX "ms_classless_static_routes", TRUE }, - { SD_DHCP_OPTION_PRIVATE_PROXY_AUTODISCOVERY, REQPREFIX "wpad", TRUE }, - { SD_DHCP_OPTION_ROOT_PATH, REQPREFIX "root_path", TRUE }, + REQ (SD_DHCP_OPTION_SUBNET_MASK, "subnet_mask", TRUE ), + REQ (SD_DHCP_OPTION_TIME_OFFSET, "time_offset", TRUE ), + REQ (SD_DHCP_OPTION_DOMAIN_NAME_SERVER, "domain_name_servers", TRUE ), + REQ (SD_DHCP_OPTION_HOST_NAME, "host_name", TRUE ), + REQ (SD_DHCP_OPTION_DOMAIN_NAME, "domain_name", TRUE ), + REQ (SD_DHCP_OPTION_INTERFACE_MTU, "interface_mtu", TRUE ), + REQ (SD_DHCP_OPTION_BROADCAST, "broadcast_address", TRUE ), + + /* RFC 3442: The Classless Static Routes option code MUST appear in the parameter + * request list prior to both the Router option code and the Static + * Routes option code, if present. */ + REQ (SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE, "rfc3442_classless_static_routes", TRUE ), + REQ (SD_DHCP_OPTION_ROUTER, "routers", TRUE ), + REQ (SD_DHCP_OPTION_STATIC_ROUTE, "static_routes", TRUE ), + + REQ (DHCP_OPTION_NIS_DOMAIN, "nis_domain", TRUE ), + REQ (DHCP_OPTION_NIS_SERVERS, "nis_servers", TRUE ), + REQ (SD_DHCP_OPTION_NTP_SERVER, "ntp_servers", TRUE ), + REQ (SD_DHCP_OPTION_SERVER_IDENTIFIER, "dhcp_server_identifier", TRUE ), + REQ (SD_DHCP_OPTION_DOMAIN_SEARCH_LIST, "domain_search", TRUE ), + REQ (SD_DHCP_OPTION_PRIVATE_CLASSLESS_STATIC_ROUTE, "ms_classless_static_routes", TRUE ), + REQ (SD_DHCP_OPTION_PRIVATE_PROXY_AUTODISCOVERY, "wpad", TRUE ), + REQ (SD_DHCP_OPTION_ROOT_PATH, "root_path", TRUE ), /* Internal values */ - { SD_DHCP_OPTION_IP_ADDRESS_LEASE_TIME, REQPREFIX "expiry", FALSE }, - { SD_DHCP_OPTION_CLIENT_IDENTIFIER, REQPREFIX "dhcp_client_identifier", FALSE }, - { DHCP_OPTION_IP_ADDRESS, REQPREFIX "ip_address", FALSE }, - { 0, NULL, FALSE } + REQ (SD_DHCP_OPTION_IP_ADDRESS_LEASE_TIME, "expiry", FALSE ), + REQ (SD_DHCP_OPTION_CLIENT_IDENTIFIER, "dhcp_client_identifier", FALSE ), + REQ (DHCP_OPTION_IP_ADDRESS, "ip_address", FALSE ), + + { 0 } }; static const ReqOption dhcp6_requests[] = { - { SD_DHCP6_OPTION_CLIENTID, REQPREFIX "dhcp6_client_id", TRUE }, + REQ (SD_DHCP6_OPTION_CLIENTID, "dhcp6_client_id", FALSE ), /* Don't request server ID by default; some servers don't reply to * Information Requests that request the Server ID. */ - { SD_DHCP6_OPTION_SERVERID, REQPREFIX "dhcp6_server_id", FALSE }, + REQ (SD_DHCP6_OPTION_SERVERID, "dhcp6_server_id", FALSE ), - { SD_DHCP6_OPTION_DNS_SERVERS, REQPREFIX "dhcp6_name_servers", TRUE }, - { SD_DHCP6_OPTION_DOMAIN_LIST, REQPREFIX "dhcp6_domain_search", TRUE }, - { SD_DHCP6_OPTION_SNTP_SERVERS, REQPREFIX "dhcp6_sntp_servers", TRUE }, + REQ (SD_DHCP6_OPTION_DNS_SERVERS, "dhcp6_name_servers", TRUE ), + REQ (SD_DHCP6_OPTION_DOMAIN_LIST, "dhcp6_domain_search", TRUE ), + REQ (SD_DHCP6_OPTION_SNTP_SERVERS, "dhcp6_sntp_servers", TRUE ), /* Internal values */ - { DHCP6_OPTION_IP_ADDRESS, REQPREFIX "ip6_address", FALSE }, - { DHCP6_OPTION_PREFIXLEN, REQPREFIX "ip6_prefixlen", FALSE }, - { DHCP6_OPTION_PREFERRED_LIFE, REQPREFIX "preferred_life", FALSE }, - { DHCP6_OPTION_MAX_LIFE, REQPREFIX "max_life", FALSE }, - { DHCP6_OPTION_STARTS, REQPREFIX "starts", FALSE }, - { DHCP6_OPTION_LIFE_STARTS, REQPREFIX "life_starts", FALSE }, - { DHCP6_OPTION_RENEW, REQPREFIX "renew", FALSE }, - { DHCP6_OPTION_REBIND, REQPREFIX "rebind", FALSE }, - { DHCP6_OPTION_IAID, REQPREFIX "iaid", FALSE }, - { 0, NULL, FALSE } + REQ (DHCP6_OPTION_IP_ADDRESS, "ip6_address", FALSE ), + REQ (DHCP6_OPTION_PREFIXLEN, "ip6_prefixlen", FALSE ), + REQ (DHCP6_OPTION_PREFERRED_LIFE, "preferred_life", FALSE ), + REQ (DHCP6_OPTION_MAX_LIFE, "max_life", FALSE ), + REQ (DHCP6_OPTION_STARTS, "starts", FALSE ), + REQ (DHCP6_OPTION_LIFE_STARTS, "life_starts", FALSE ), + REQ (DHCP6_OPTION_RENEW, "renew", FALSE ), + REQ (DHCP6_OPTION_REBIND, "rebind", FALSE ), + REQ (DHCP6_OPTION_IAID, "iaid", FALSE ), + + { 0 } }; static void @@ -165,18 +177,22 @@ take_option (GHashTable *options, { guint i; - g_return_if_fail (value != NULL); + nm_assert (options); + nm_assert (requests); + nm_assert (value); for (i = 0; requests[i].name; i++) { - if (requests[i].num == option) { + nm_assert (g_str_has_prefix (requests[i].name, REQPREFIX)); + if (requests[i].option_num == option) { g_hash_table_insert (options, (gpointer) (requests[i].name + NM_STRLEN (REQPREFIX)), value); - break; + return; } } + /* Option should always be found */ - g_assert (requests[i].name); + nm_assert_not_reached (); } static void @@ -187,13 +203,6 @@ add_option (GHashTable *options, const ReqOption *requests, guint option, const } static void -add_option_u32 (GHashTable *options, const ReqOption *requests, guint option, guint32 value) -{ - if (options) - take_option (options, requests, option, g_strdup_printf ("%u", value)); -} - -static void add_option_u64 (GHashTable *options, const ReqOption *requests, guint option, guint64 value) { if (options) @@ -205,12 +214,21 @@ add_requests_to_options (GHashTable *options, const ReqOption *requests) { guint i; - for (i = 0; options && requests[i].name; i++) { + if (!options) + return; + + for (i = 0; requests[i].name; i++) { if (requests[i].include) g_hash_table_insert (options, (gpointer) requests[i].name, g_strdup ("1")); } } +static GHashTable * +create_options_dict (void) +{ + return g_hash_table_new_full (nm_str_hash, g_str_equal, NULL, g_free); +} + #define LOG_LEASE(domain, ...) \ G_STMT_START { \ if (log_lease) { \ @@ -223,231 +241,322 @@ lease_to_ip4_config (NMDedupMultiIndex *multi_idx, const char *iface, int ifindex, sd_dhcp_lease *lease, - GHashTable *options, guint32 route_table, guint32 route_metric, gboolean log_lease, + GHashTable **out_options, GError **error) { - NMIP4Config *ip4_config = NULL; - struct in_addr tmp_addr; + gs_unref_object NMIP4Config *ip4_config = NULL; + gs_unref_hashtable GHashTable *options = NULL; const struct in_addr *addr_list; - char buf[INET_ADDRSTRLEN]; + char addr_str[NM_UTILS_INET_ADDRSTRLEN]; const char *s; - guint32 lifetime = 0, i; - NMPlatformIP4Address address; nm_auto_free_gstring GString *str = NULL; gs_free sd_dhcp_route **routes = NULL; const char *const*search_domains = NULL; guint16 mtu; - int r, num; - guint64 end_time; + int i, num; const void *data; gsize data_len; gboolean metered = FALSE; - gboolean static_default_gateway = FALSE; - gboolean gateway_has = FALSE; - in_addr_t gateway = 0; + gboolean has_router_from_classless = FALSE; + gboolean has_classless_route = FALSE; + gboolean has_static_route = FALSE; + const gint32 ts = nm_utils_get_monotonic_timestamp_s (); + gint64 ts_time = time (NULL); + struct in_addr a_address; + struct in_addr a_netmask; + const struct in_addr *a_router; + guint32 a_plen; + guint32 a_lifetime; g_return_val_if_fail (lease != NULL, NULL); + if (sd_dhcp_lease_get_address (lease, &a_address) < 0) { + nm_utils_error_set_literal (error, NM_UTILS_ERROR_UNKNOWN, "could not get address from lease"); + return NULL; + } + + if (sd_dhcp_lease_get_netmask (lease, &a_netmask) < 0) { + nm_utils_error_set_literal (error, NM_UTILS_ERROR_UNKNOWN, "could not get netmask from lease"); + return NULL; + } + + if (sd_dhcp_lease_get_lifetime (lease, &a_lifetime) < 0) { + nm_utils_error_set_literal (error, NM_UTILS_ERROR_UNKNOWN, "could not get lifetime from lease"); + return NULL; + } + ip4_config = nm_ip4_config_new (multi_idx, 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; - s = nm_utils_inet4_ntop (tmp_addr.s_addr, NULL); - LOG_LEASE (LOGD_DHCP4, "address %s", s); - add_option (options, dhcp4_requests, DHCP_OPTION_IP_ADDRESS, s); - - /* 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); + options = out_options ? create_options_dict () : NULL; + + nm_utils_inet4_ntop (a_address.s_addr, addr_str); + LOG_LEASE (LOGD_DHCP4, "address %s", addr_str); + add_option (options, dhcp4_requests, DHCP_OPTION_IP_ADDRESS, addr_str); + + a_plen = nm_utils_ip4_netmask_to_prefix (a_netmask.s_addr); + LOG_LEASE (LOGD_DHCP4, "plen %u", (guint) a_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); + nm_utils_inet4_ntop (a_netmask.s_addr, addr_str)); + + LOG_LEASE (LOGD_DHCP4, "expires in %u seconds (at %lld)", + (guint) a_lifetime, + (long long) (ts_time + a_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); + (guint64) (ts_time + a_lifetime)); + + nm_ip4_config_add_address (ip4_config, + &((const NMPlatformIP4Address) { + .address = a_address.s_addr, + .peer_address = a_address.s_addr, + .plen = a_plen, + .addr_source = NM_IP_CONFIG_SOURCE_DHCP, + .timestamp = ts, + .lifetime = a_lifetime, + .preferred = a_lifetime, + })); - /* DNS Servers */ num = sd_dhcp_lease_get_dns (lease, &addr_list); if (num > 0) { nm_gstring_prepare (&str); for (i = 0; i < num; i++) { - if (addr_list[i].s_addr) { - nm_ip4_config_add_nameserver (ip4_config, addr_list[i].s_addr); - s = nm_utils_inet4_ntop (addr_list[i].s_addr, NULL); - LOG_LEASE (LOGD_DHCP4, "nameserver '%s'", s); - g_string_append_printf (str, "%s%s", str->len ? " " : "", s); + nm_utils_inet4_ntop (addr_list[i].s_addr, addr_str); + g_string_append (nm_gstring_add_space_delimiter (str), addr_str); + + if ( addr_list[i].s_addr == 0 + || nm_ip4_addr_is_localhost (addr_list[i].s_addr)) { + /* Skip localhost addresses, like also networkd does. + * See https://github.com/systemd/systemd/issues/4524. */ + continue; } + nm_ip4_config_add_nameserver (ip4_config, addr_list[i].s_addr); } - if (str->len) - add_option (options, dhcp4_requests, SD_DHCP_OPTION_DOMAIN_NAME_SERVER, str->str); + LOG_LEASE (LOGD_DHCP4, "nameserver '%s'", str->str); + add_option (options, dhcp4_requests, SD_DHCP_OPTION_DOMAIN_NAME_SERVER, str->str); } - /* Search domains */ num = sd_dhcp_lease_get_search_domains (lease, (char ***) &search_domains); if (num > 0) { nm_gstring_prepare (&str); for (i = 0; i < num; i++) { + g_string_append (nm_gstring_add_space_delimiter (str), search_domains[i]); nm_ip4_config_add_search (ip4_config, search_domains[i]); - g_string_append_printf (str, "%s%s", str->len ? " " : "", search_domains[i]); - LOG_LEASE (LOGD_DHCP4, "domain search '%s'", search_domains[i]); } + LOG_LEASE (LOGD_DHCP4, "domain search '%s'", str->str); add_option (options, dhcp4_requests, SD_DHCP_OPTION_DOMAIN_SEARCH_LIST, str->str); } - /* Domain Name */ - r = sd_dhcp_lease_get_domainname (lease, &s); - 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 (s, "\\032", 0); + if (sd_dhcp_lease_get_domainname (lease, &s) >= 0) { + gs_strfreev char **domains = NULL; char **d; - for (d = domains; *d; d++) { - LOG_LEASE (LOGD_DHCP4, "domain name '%s'", *d); - nm_ip4_config_add_domain (ip4_config, *d); - } - g_strfreev (domains); + LOG_LEASE (LOGD_DHCP4, "domain name '%s'", s); add_option (options, dhcp4_requests, SD_DHCP_OPTION_DOMAIN_NAME, s); + + /* Multiple domains sometimes stuffed into option 15 "Domain Name". + * As systemd escapes such characters, split them at \\032. */ + domains = g_strsplit (s, "\\032", 0); + for (d = domains; *d; d++) + nm_ip4_config_add_domain (ip4_config, *d); } - /* Hostname */ - r = sd_dhcp_lease_get_hostname (lease, &s); - if (r == 0) { + if (sd_dhcp_lease_get_hostname (lease, &s) >= 0) { LOG_LEASE (LOGD_DHCP4, "hostname '%s'", s); add_option (options, dhcp4_requests, SD_DHCP_OPTION_HOST_NAME, s); } - /* Routes */ num = sd_dhcp_lease_get_routes (lease, &routes); if (num > 0) { - nm_gstring_prepare (&str); + nm_auto_free_gstring GString *str_classless = NULL; + nm_auto_free_gstring GString *str_static = NULL; + guint32 default_route_metric = route_metric; + for (i = 0; i < num; i++) { - NMPlatformIP4Route route = { 0 }; - const char *gw_str; - guint8 plen; - struct in_addr a; + switch (sd_dhcp_route_get_option (routes[i])) { + case SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE: + has_classless_route = TRUE; + break; + case SD_DHCP_OPTION_STATIC_ROUTE: + has_static_route = TRUE; + break; + } + } - if (sd_dhcp_route_get_destination (routes[i], &a) < 0) + if (has_classless_route) + str_classless = g_string_sized_new (30); + if (has_static_route) + str_static = g_string_sized_new (30); + + for (i = 0; i < num; i++) { + char network_net_str[NM_UTILS_INET_ADDRSTRLEN]; + char gateway_str[NM_UTILS_INET_ADDRSTRLEN]; + guint8 r_plen; + struct in_addr r_network; + struct in_addr r_gateway; + in_addr_t network_net; + int option; + guint32 m; + + option = sd_dhcp_route_get_option (routes[i]); + if (!NM_IN_SET (option, SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE, + SD_DHCP_OPTION_STATIC_ROUTE)) continue; - if ( sd_dhcp_route_get_destination_prefix_length (routes[i], &plen) < 0 - || plen > 32) + if (sd_dhcp_route_get_destination (routes[i], &r_network) < 0) + continue; + if ( sd_dhcp_route_get_destination_prefix_length (routes[i], &r_plen) < 0 + || r_plen > 32) + continue; + if (sd_dhcp_route_get_gateway (routes[i], &r_gateway) < 0) continue; - route.plen = plen; - route.network = nm_utils_ip4_address_clear_host_address (a.s_addr, plen); + network_net = nm_utils_ip4_address_clear_host_address (r_network.s_addr, + r_plen); + nm_utils_inet4_ntop (network_net, network_net_str); + nm_utils_inet4_ntop (r_gateway.s_addr, gateway_str); + + LOG_LEASE (LOGD_DHCP4, + "%sstatic route %s/%d gw %s", + option == SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE + ? "classless " + : "", + network_net_str, + (int) r_plen, + gateway_str); + g_string_append_printf (nm_gstring_add_space_delimiter ( option == SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE + ? str_classless + : str_static), + "%s/%d %s", + network_net_str, + (int) r_plen, + gateway_str); + + if ( option == SD_DHCP_OPTION_STATIC_ROUTE + && has_classless_route) { + /* RFC 3443: if the DHCP server returns both a Classless Static Routes + * option and a Static Routes option, the DHCP client MUST ignore the + * Static Routes option. */ + continue; + } - if (sd_dhcp_route_get_gateway (routes[i], &a) < 0) + if ( r_plen == 0 + && option == SD_DHCP_OPTION_STATIC_ROUTE) { + /* for option 33 (static route), RFC 2132 says: + * + * The default route (0.0.0.0) is an illegal destination for a static + * route. */ continue; - route.gateway = a.s_addr; - - if (route.plen) { - route.rt_source = NM_IP_CONFIG_SOURCE_DHCP; - route.metric = route_metric; - route.table_coerced = nm_platform_route_table_coerce (route_table); - nm_ip4_config_add_route (ip4_config, &route, NULL); - - s = 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", s, route.plen, gw_str); - - g_string_append_printf (str, "%s%s/%d %s", str->len ? " " : "", s, route.plen, gw_str); - } else { - if (!static_default_gateway) { - static_default_gateway = TRUE; - gateway_has = TRUE; - gateway = route.gateway; - - s = nm_utils_inet4_ntop (route.gateway, NULL); - LOG_LEASE (LOGD_DHCP4, "gateway %s", s); - add_option (options, dhcp4_requests, SD_DHCP_OPTION_ROUTER, s); - } } - } - if (str->len) - add_option (options, dhcp4_requests, SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE, str->str); - } - /* 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) { - gateway_has = TRUE; - gateway = tmp_addr.s_addr; - s = nm_utils_inet4_ntop (tmp_addr.s_addr, NULL); - LOG_LEASE (LOGD_DHCP4, "gateway %s", s); - add_option (options, dhcp4_requests, SD_DHCP_OPTION_ROUTER, s); + if (r_plen == 0) { + /* if there are multiple default routes, we add them with differing + * metrics. */ + m = default_route_metric; + if (default_route_metric < G_MAXUINT32) + default_route_metric++; + + has_router_from_classless = TRUE; + } else + m = route_metric; + + nm_ip4_config_add_route (ip4_config, + &((const NMPlatformIP4Route) { + .network = network_net, + .plen = r_plen, + .gateway = r_gateway.s_addr, + .rt_source = NM_IP_CONFIG_SOURCE_DHCP, + .metric = m, + .table_coerced = nm_platform_route_table_coerce (route_table), + }), + NULL); } + + if (str_classless && str_classless->len > 0) + add_option (options, dhcp4_requests, SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE, str_classless->str); + if (str_static && str_static->len > 0) + add_option (options, dhcp4_requests, SD_DHCP_OPTION_STATIC_ROUTE, str_static->str); } - if (gateway_has) { - const NMPlatformIP4Route rt = { - .rt_source = NM_IP_CONFIG_SOURCE_DHCP, - .gateway = gateway, - .table_coerced = nm_platform_route_table_coerce (route_table), - .metric = route_metric, - }; + num = sd_dhcp_lease_get_router (lease, &a_router); + if (num > 0) { + guint32 default_route_metric = route_metric; + + nm_gstring_prepare (&str); + for (i = 0; i < num; i++) { + guint32 m; + + s = nm_utils_inet4_ntop (a_router[i].s_addr, addr_str); + g_string_append (nm_gstring_add_space_delimiter (str), s); + + if (a_router[i].s_addr == 0) { + /* silently skip 0.0.0.0 */ + continue; + } - nm_ip4_config_add_route (ip4_config, &rt, NULL); + if (has_router_from_classless) { + /* 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). + */ + continue; + } + + /* if there are multiple default routes, we add them with differing + * metrics. */ + m = default_route_metric; + if (default_route_metric < G_MAXUINT32) + default_route_metric++; + + nm_ip4_config_add_route (ip4_config, + &((const NMPlatformIP4Route) { + .rt_source = NM_IP_CONFIG_SOURCE_DHCP, + .gateway = a_router[i].s_addr, + .table_coerced = nm_platform_route_table_coerce (route_table), + .metric = m, + }), + NULL); + } + LOG_LEASE (LOGD_DHCP4, "router %s", str->str); + add_option (options, dhcp4_requests, SD_DHCP_OPTION_ROUTER, str->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); + if ( sd_dhcp_lease_get_mtu (lease, &mtu) >= 0 + && mtu) { LOG_LEASE (LOGD_DHCP4, "mtu %u", mtu); + add_option_u64 (options, dhcp4_requests, SD_DHCP_OPTION_INTERFACE_MTU, mtu); + nm_ip4_config_set_mtu (ip4_config, mtu, NM_IP_CONFIG_SOURCE_DHCP); } - /* NTP servers */ num = sd_dhcp_lease_get_ntp (lease, &addr_list); if (num > 0) { nm_gstring_prepare (&str); for (i = 0; i < num; i++) { - s = nm_utils_inet4_ntop (addr_list[i].s_addr, buf); - LOG_LEASE (LOGD_DHCP4, "ntp server '%s'", s); - g_string_append_printf (str, "%s%s", str->len ? " " : "", s); + nm_utils_inet4_ntop (addr_list[i].s_addr, addr_str); + g_string_append (nm_gstring_add_space_delimiter (str), addr_str); } + LOG_LEASE (LOGD_DHCP4, "ntp server '%s'", str->str); add_option (options, dhcp4_requests, SD_DHCP_OPTION_NTP_SERVER, str->str); } - /* Root path */ - r = sd_dhcp_lease_get_root_path (lease, &s); - if (r >= 0) { + if (sd_dhcp_lease_get_root_path (lease, &s) >= 0) { LOG_LEASE (LOGD_DHCP4, "root path '%s'", s); add_option (options, dhcp4_requests, SD_DHCP_OPTION_ROOT_PATH, s); } - r = sd_dhcp_lease_get_vendor_specific (lease, &data, &data_len); - if (r >= 0) + if (sd_dhcp_lease_get_vendor_specific (lease, &data, &data_len) >= 0) metered = !!memmem (data, data_len, "ANDROID_METERED", NM_STRLEN ("ANDROID_METERED")); nm_ip4_config_set_metered (ip4_config, metered); - return ip4_config; + NM_SET_OUT (out_options, g_steal_pointer (&options)); + return g_steal_pointer (&ip4_config); } /*****************************************************************************/ @@ -489,13 +598,12 @@ bound4_handle (NMDhcpSystemd *self) NMDhcpSystemdPrivate *priv = NM_DHCP_SYSTEMD_GET_PRIVATE (self); const char *iface = nm_dhcp_client_get_iface (NM_DHCP_CLIENT (self)); sd_dhcp_lease *lease; - NMIP4Config *ip4_config; - GHashTable *options; + gs_unref_object NMIP4Config *ip4_config = NULL; + gs_unref_hashtable GHashTable *options = NULL; GError *error = NULL; - int r; - r = sd_dhcp_client_get_lease (priv->client4, &lease); - if (r < 0 || !lease) { + if ( sd_dhcp_client_get_lease (priv->client4, &lease) < 0 + || !lease) { _LOGW ("no lease!"); nm_dhcp_client_set_state (NM_DHCP_CLIENT (self), NM_DHCP_STATE_FAIL, NULL, NULL); return; @@ -503,32 +611,29 @@ bound4_handle (NMDhcpSystemd *self) _LOGD ("lease available"); - options = g_hash_table_new_full (nm_str_hash, g_str_equal, NULL, g_free); ip4_config = lease_to_ip4_config (nm_dhcp_client_get_multi_idx (NM_DHCP_CLIENT (self)), iface, nm_dhcp_client_get_ifindex (NM_DHCP_CLIENT (self)), lease, - options, nm_dhcp_client_get_route_table (NM_DHCP_CLIENT (self)), nm_dhcp_client_get_route_metric (NM_DHCP_CLIENT (self)), TRUE, + &options, &error); - if (ip4_config) { - add_requests_to_options (options, dhcp4_requests); - dhcp_lease_save (lease, priv->lease_file); - - nm_dhcp_client_set_state (NM_DHCP_CLIENT (self), - NM_DHCP_STATE_BOUND, - NM_IP_CONFIG_CAST (ip4_config), - options); - } else { + if (!ip4_config) { _LOGW ("%s", error->message); - nm_dhcp_client_set_state (NM_DHCP_CLIENT (self), NM_DHCP_STATE_FAIL, NULL, NULL); g_clear_error (&error); + nm_dhcp_client_set_state (NM_DHCP_CLIENT (self), NM_DHCP_STATE_FAIL, NULL, NULL); + return; } - g_hash_table_destroy (options); - g_clear_object (&ip4_config); + add_requests_to_options (options, dhcp4_requests); + dhcp_lease_save (lease, priv->lease_file); + + nm_dhcp_client_set_state (NM_DHCP_CLIENT (self), + NM_DHCP_STATE_BOUND, + NM_IP_CONFIG_CAST (ip4_config), + options); } static void @@ -645,8 +750,7 @@ ip4_start (NMDhcpClient *client, client_id = nm_dhcp_client_get_client_id (client); if (!client_id) { - client_id_new = nm_utils_dhcp_client_id_systemd_node_specific (TRUE, - nm_dhcp_client_get_iface (client)); + client_id_new = nm_utils_dhcp_client_id_mac (arp_type, hwaddr_arr, hwaddr_len); client_id = client_id_new; } @@ -673,8 +777,11 @@ ip4_start (NMDhcpClient *client, /* Add requested options */ for (i = 0; dhcp4_requests[i].name; i++) { - if (dhcp4_requests[i].include) - sd_dhcp_client_set_request_option (sd_client, dhcp4_requests[i].num); + if (dhcp4_requests[i].include) { + nm_assert (dhcp4_requests[i].option_num <= 255); + r = sd_dhcp_client_set_request_option (sd_client, dhcp4_requests[i].option_num); + nm_assert (r >= 0 || r == -EEXIST); + } } hostname = nm_dhcp_client_get_hostname (client); @@ -720,52 +827,54 @@ lease_to_ip6_config (NMDedupMultiIndex *multi_idx, const char *iface, int ifindex, sd_dhcp6_lease *lease, - GHashTable *options, gboolean log_lease, gboolean info_only, + GHashTable **out_options, GError **error) { + gs_unref_object NMIP6Config *ip6_config = NULL; + gs_unref_hashtable GHashTable *options = NULL; struct in6_addr tmp_addr, *dns; uint32_t lft_pref, lft_valid; - NMIP6Config *ip6_config; - const char *addr_str; + char addr_str[NM_UTILS_INET_ADDRSTRLEN]; char **domains; nm_auto_free_gstring GString *str = NULL; int num, i; - gint32 ts; + const gint32 ts = nm_utils_get_monotonic_timestamp_s (); g_return_val_if_fail (lease, NULL); + ip6_config = nm_ip6_config_new (multi_idx, ifindex); - ts = nm_utils_get_monotonic_timestamp_s (); - /* Addresses */ + options = out_options ? create_options_dict () : NULL; + sd_dhcp6_lease_reset_address_iter (lease); nm_gstring_prepare (&str); while (sd_dhcp6_lease_get_address (lease, &tmp_addr, &lft_pref, &lft_valid) >= 0) { - NMPlatformIP6Address address = { - .plen = 128, - .address = tmp_addr, - .timestamp = ts, - .lifetime = lft_valid, - .preferred = lft_pref, + char sbuf[400]; + const NMPlatformIP6Address address = { + .plen = 128, + .address = tmp_addr, + .timestamp = ts, + .lifetime = lft_valid, + .preferred = lft_pref, .addr_source = NM_IP_CONFIG_SOURCE_DHCP, }; nm_ip6_config_add_address (ip6_config, &address); - addr_str = nm_utils_inet6_ntop (&tmp_addr, NULL); - g_string_append_printf (str, "%s%s", str->len ? " " : "", addr_str); + nm_utils_inet6_ntop (&tmp_addr, addr_str); + g_string_append (nm_gstring_add_space_delimiter (str), addr_str); LOG_LEASE (LOGD_DHCP6, "address %s", - nm_platform_ip6_address_to_string (&address, NULL, 0)); + nm_platform_ip6_address_to_string (&address, sbuf, sizeof (sbuf))); }; - if (str->len) add_option (options, dhcp6_requests, DHCP6_OPTION_IP_ADDRESS, str->str); - if (!info_only && nm_ip6_config_get_num_addresses (ip6_config) == 0) { - g_object_unref (ip6_config); + if ( !info_only + && nm_ip6_config_get_num_addresses (ip6_config) == 0) { g_set_error_literal (error, NM_MANAGER_ERROR, NM_MANAGER_ERROR_FAILED, @@ -773,32 +882,31 @@ lease_to_ip6_config (NMDedupMultiIndex *multi_idx, return NULL; } - /* DNS servers */ num = sd_dhcp6_lease_get_dns (lease, &dns); if (num > 0) { nm_gstring_prepare (&str); for (i = 0; i < num; i++) { + nm_utils_inet6_ntop (&dns[i], addr_str); + g_string_append (nm_gstring_add_space_delimiter (str), addr_str); nm_ip6_config_add_nameserver (ip6_config, &dns[i]); - addr_str = nm_utils_inet6_ntop (&dns[i], NULL); - g_string_append_printf (str, "%s%s", str->len ? " " : "", addr_str); - LOG_LEASE (LOGD_DHCP6, "nameserver %s", addr_str); } + LOG_LEASE (LOGD_DHCP6, "nameserver %s", str->str); add_option (options, dhcp6_requests, SD_DHCP6_OPTION_DNS_SERVERS, str->str); } - /* Search domains */ num = sd_dhcp6_lease_get_domains (lease, &domains); if (num > 0) { nm_gstring_prepare (&str); for (i = 0; i < num; i++) { + g_string_append (nm_gstring_add_space_delimiter (str), domains[i]); nm_ip6_config_add_search (ip6_config, domains[i]); - g_string_append_printf (str, "%s%s", str->len ? " " : "", domains[i]); - LOG_LEASE (LOGD_DHCP6, "domain name '%s'", domains[i]); } + LOG_LEASE (LOGD_DHCP6, "domain name '%s'", str->str); add_option (options, dhcp6_requests, SD_DHCP6_OPTION_DOMAIN_LIST, str->str); } - return ip6_config; + NM_SET_OUT (out_options, g_steal_pointer (&options)); + return g_steal_pointer (&ip6_config); } static void @@ -810,10 +918,9 @@ bound6_handle (NMDhcpSystemd *self) gs_unref_hashtable GHashTable *options = NULL; gs_free_error GError *error = NULL; sd_dhcp6_lease *lease; - int r; - r = sd_dhcp6_client_get_lease (priv->client6, &lease); - if (r < 0 || !lease) { + if ( sd_dhcp6_client_get_lease (priv->client6, &lease) < 0 + || !lease) { _LOGW (" no lease!"); nm_dhcp_client_set_state (NM_DHCP_CLIENT (self), NM_DHCP_STATE_FAIL, NULL, NULL); return; @@ -821,25 +928,25 @@ bound6_handle (NMDhcpSystemd *self) _LOGD ("lease available"); - options = g_hash_table_new_full (nm_str_hash, g_str_equal, NULL, g_free); ip6_config = lease_to_ip6_config (nm_dhcp_client_get_multi_idx (NM_DHCP_CLIENT (self)), iface, nm_dhcp_client_get_ifindex (NM_DHCP_CLIENT (self)), lease, - options, TRUE, nm_dhcp_client_get_info_only (NM_DHCP_CLIENT (self)), + &options, &error); - if (ip6_config) { - nm_dhcp_client_set_state (NM_DHCP_CLIENT (self), - NM_DHCP_STATE_BOUND, - NM_IP_CONFIG_CAST (ip6_config), - options); - } else { + if (!ip6_config) { _LOGW ("%s", error->message); nm_dhcp_client_set_state (NM_DHCP_CLIENT (self), NM_DHCP_STATE_FAIL, NULL, NULL); + return; } + + nm_dhcp_client_set_state (NM_DHCP_CLIENT (self), + NM_DHCP_STATE_BOUND, + NM_IP_CONFIG_CAST (ip6_config), + options); } static void @@ -883,6 +990,7 @@ ip6_start (NMDhcpClient *client, nm_auto (sd_dhcp6_client_unrefp) sd_dhcp6_client *sd_client = NULL; GBytes *hwaddr; const char *hostname; + const char *iface; int r, i; const guint8 *duid_arr; gsize duid_len; @@ -917,6 +1025,17 @@ ip6_start (NMDhcpClient *client, if (nm_dhcp_client_get_info_only (client)) sd_dhcp6_client_set_information_request (sd_client, 1); + iface = nm_dhcp_client_get_iface (client); + + r = sd_dhcp6_client_set_iaid (sd_client, + nm_utils_create_dhcp_iaid (TRUE, + (const guint8 *) iface, + strlen (iface))); + if (r < 0) { + nm_utils_error_set_errno (error, r, "failed to set IAID: %s"); + return FALSE; + } + r = sd_dhcp6_client_set_duid (sd_client, unaligned_read_be16 (&duid_arr[0]), &duid_arr[2], @@ -957,8 +1076,10 @@ ip6_start (NMDhcpClient *client, /* Add requested options */ for (i = 0; dhcp6_requests[i].name; i++) { - if (dhcp6_requests[i].include) - sd_dhcp6_client_set_request_option (sd_client, dhcp6_requests[i].num); + if (dhcp6_requests[i].include) { + r = sd_dhcp6_client_set_request_option (sd_client, dhcp6_requests[i].option_num); + nm_assert (r >= 0 || r == -EEXIST); + } } r = sd_dhcp6_client_set_local_address (sd_client, ll_addr); |