| /* SPDX-License-Identifier: LGPL-2.1+ */ |
| /*** |
| Copyright © 2014 Intel Corporation. All rights reserved. |
| ***/ |
| |
| #include <netinet/icmp6.h> |
| #include <arpa/inet.h> |
| |
| #include "sd-ndisc.h" |
| |
| #include "missing_network.h" |
| #include "networkd-dhcp6.h" |
| #include "networkd-manager.h" |
| #include "networkd-ndisc.h" |
| #include "networkd-route.h" |
| #include "strv.h" |
| |
| #define NDISC_DNSSL_MAX 64U |
| #define NDISC_RDNSS_MAX 64U |
| #define NDISC_PREFIX_LFT_MIN 7200U |
| |
| static int ndisc_netlink_route_message_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->ndisc_messages > 0); |
| |
| link->ndisc_messages--; |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return 1; |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0 && r != -EEXIST) { |
| log_link_error_errno(link, r, "Could not set NDisc route or address: %m"); |
| link_enter_failed(link); |
| return 1; |
| } |
| |
| if (link->ndisc_messages == 0) { |
| link->ndisc_configured = true; |
| r = link_request_set_routes(link); |
| if (r < 0) { |
| link_enter_failed(link); |
| return 1; |
| } |
| link_check_ready(link); |
| } |
| |
| return 1; |
| } |
| |
| static int ndisc_netlink_address_message_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->ndisc_messages > 0); |
| |
| link->ndisc_messages--; |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return 1; |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0 && r != -EEXIST) { |
| log_link_error_errno(link, r, "Could not set NDisc route or address: %m"); |
| link_enter_failed(link); |
| return 1; |
| } else if (r >= 0) |
| (void) manager_rtnl_process_address(rtnl, m, link->manager); |
| |
| if (link->ndisc_messages == 0) { |
| link->ndisc_configured = true; |
| r = link_request_set_routes(link); |
| if (r < 0) { |
| link_enter_failed(link); |
| return 1; |
| } |
| link_check_ready(link); |
| } |
| |
| return 1; |
| } |
| |
| static int ndisc_router_process_default(Link *link, sd_ndisc_router *rt) { |
| _cleanup_(route_freep) Route *route = NULL; |
| union in_addr_union gateway; |
| uint16_t lifetime; |
| unsigned preference; |
| uint32_t mtu; |
| usec_t time_now; |
| int r; |
| Address *address; |
| Iterator i; |
| |
| assert(link); |
| assert(rt); |
| |
| r = sd_ndisc_router_get_lifetime(rt, &lifetime); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m"); |
| |
| if (lifetime == 0) /* not a default router */ |
| return 0; |
| |
| r = sd_ndisc_router_get_address(rt, &gateway.in6); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m"); |
| |
| SET_FOREACH(address, link->addresses, i) { |
| if (address->family != AF_INET6) |
| continue; |
| if (in_addr_equal(AF_INET6, &gateway, &address->in_addr)) { |
| _cleanup_free_ char *buffer = NULL; |
| |
| (void) in_addr_to_string(AF_INET6, &address->in_addr, &buffer); |
| log_link_debug(link, "No NDisc route added, gateway %s matches local address", |
| strnull(buffer)); |
| return 0; |
| } |
| } |
| |
| SET_FOREACH(address, link->addresses_foreign, i) { |
| if (address->family != AF_INET6) |
| continue; |
| if (in_addr_equal(AF_INET6, &gateway, &address->in_addr)) { |
| _cleanup_free_ char *buffer = NULL; |
| |
| (void) in_addr_to_string(AF_INET6, &address->in_addr, &buffer); |
| log_link_debug(link, "No NDisc route added, gateway %s matches local address", |
| strnull(buffer)); |
| return 0; |
| } |
| } |
| |
| r = sd_ndisc_router_get_preference(rt, &preference); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to get default router preference from RA: %m"); |
| |
| r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); |
| |
| r = sd_ndisc_router_get_mtu(rt, &mtu); |
| if (r == -ENODATA) |
| mtu = 0; |
| else if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to get default router MTU from RA: %m"); |
| |
| r = route_new(&route); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not allocate route: %m"); |
| |
| route->family = AF_INET6; |
| route->table = link_get_ipv6_accept_ra_route_table(link); |
| route->priority = link->network->dhcp_route_metric; |
| route->protocol = RTPROT_RA; |
| route->pref = preference; |
| route->gw = gateway; |
| route->lifetime = time_now + lifetime * USEC_PER_SEC; |
| route->mtu = mtu; |
| |
| r = route_configure(route, link, ndisc_netlink_route_message_handler); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Could not set default route: %m"); |
| link_enter_failed(link); |
| return r; |
| } |
| if (r > 0) |
| link->ndisc_messages++; |
| |
| return 0; |
| } |
| |
| static int ndisc_router_process_autonomous_prefix(Link *link, sd_ndisc_router *rt) { |
| _cleanup_(address_freep) Address *address = NULL; |
| Address *existing_address; |
| uint32_t lifetime_valid, lifetime_preferred, lifetime_remaining; |
| usec_t time_now; |
| unsigned prefixlen; |
| int r; |
| |
| assert(link); |
| assert(rt); |
| |
| r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); |
| |
| r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to get prefix length: %m"); |
| |
| r = sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime_valid); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to get prefix valid lifetime: %m"); |
| |
| r = sd_ndisc_router_prefix_get_preferred_lifetime(rt, &lifetime_preferred); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to get prefix preferred lifetime: %m"); |
| |
| /* The preferred lifetime is never greater than the valid lifetime */ |
| if (lifetime_preferred > lifetime_valid) |
| return 0; |
| |
| r = address_new(&address); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not allocate address: %m"); |
| |
| address->family = AF_INET6; |
| r = sd_ndisc_router_prefix_get_address(rt, &address->in_addr.in6); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to get prefix address: %m"); |
| |
| if (in_addr_is_null(AF_INET6, (const union in_addr_union *) &link->network->ipv6_token) == 0) |
| memcpy(((char *)&address->in_addr.in6) + 8, ((char *)&link->network->ipv6_token) + 8, 8); |
| else { |
| /* see RFC4291 section 2.5.1 */ |
| address->in_addr.in6.s6_addr[8] = link->mac.ether_addr_octet[0]; |
| address->in_addr.in6.s6_addr[8] ^= 1 << 1; |
| address->in_addr.in6.s6_addr[9] = link->mac.ether_addr_octet[1]; |
| address->in_addr.in6.s6_addr[10] = link->mac.ether_addr_octet[2]; |
| address->in_addr.in6.s6_addr[11] = 0xff; |
| address->in_addr.in6.s6_addr[12] = 0xfe; |
| address->in_addr.in6.s6_addr[13] = link->mac.ether_addr_octet[3]; |
| address->in_addr.in6.s6_addr[14] = link->mac.ether_addr_octet[4]; |
| address->in_addr.in6.s6_addr[15] = link->mac.ether_addr_octet[5]; |
| } |
| address->prefixlen = prefixlen; |
| address->flags = IFA_F_NOPREFIXROUTE|IFA_F_MANAGETEMPADDR; |
| address->cinfo.ifa_prefered = lifetime_preferred; |
| |
| /* see RFC4862 section 5.5.3.e */ |
| r = address_get(link, address->family, &address->in_addr, address->prefixlen, &existing_address); |
| if (r > 0) { |
| lifetime_remaining = existing_address->cinfo.tstamp / 100 + existing_address->cinfo.ifa_valid - time_now / USEC_PER_SEC; |
| if (lifetime_valid > NDISC_PREFIX_LFT_MIN || lifetime_valid > lifetime_remaining) |
| address->cinfo.ifa_valid = lifetime_valid; |
| else if (lifetime_remaining <= NDISC_PREFIX_LFT_MIN) |
| address->cinfo.ifa_valid = lifetime_remaining; |
| else |
| address->cinfo.ifa_valid = NDISC_PREFIX_LFT_MIN; |
| } else if (lifetime_valid > 0) |
| address->cinfo.ifa_valid = lifetime_valid; |
| else |
| return 0; /* see RFC4862 section 5.5.3.d */ |
| |
| if (address->cinfo.ifa_valid == 0) |
| return 0; |
| |
| r = address_configure(address, link, ndisc_netlink_address_message_handler, true); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Could not set SLAAC address: %m"); |
| link_enter_failed(link); |
| return r; |
| } |
| if (r > 0) |
| link->ndisc_messages++; |
| |
| return 0; |
| } |
| |
| static int ndisc_router_process_onlink_prefix(Link *link, sd_ndisc_router *rt) { |
| _cleanup_(route_freep) Route *route = NULL; |
| usec_t time_now; |
| uint32_t lifetime; |
| unsigned prefixlen; |
| int r; |
| |
| assert(link); |
| assert(rt); |
| |
| r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); |
| |
| r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to get prefix length: %m"); |
| |
| r = sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to get prefix lifetime: %m"); |
| |
| r = route_new(&route); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not allocate route: %m"); |
| |
| route->family = AF_INET6; |
| route->table = link_get_ipv6_accept_ra_route_table(link); |
| route->priority = link->network->dhcp_route_metric; |
| route->protocol = RTPROT_RA; |
| route->flags = RTM_F_PREFIX; |
| route->dst_prefixlen = prefixlen; |
| route->lifetime = time_now + lifetime * USEC_PER_SEC; |
| |
| r = sd_ndisc_router_prefix_get_address(rt, &route->dst.in6); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to get prefix address: %m"); |
| |
| r = route_configure(route, link, ndisc_netlink_route_message_handler); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Could not set prefix route: %m"); |
| link_enter_failed(link); |
| return r; |
| } |
| if (r > 0) |
| link->ndisc_messages++; |
| |
| return 0; |
| } |
| |
| static int ndisc_router_process_route(Link *link, sd_ndisc_router *rt) { |
| _cleanup_(route_freep) Route *route = NULL; |
| struct in6_addr gateway; |
| uint32_t lifetime; |
| unsigned preference, prefixlen; |
| usec_t time_now; |
| int r; |
| |
| assert(link); |
| |
| r = sd_ndisc_router_route_get_lifetime(rt, &lifetime); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m"); |
| |
| if (lifetime == 0) |
| return 0; |
| |
| r = sd_ndisc_router_get_address(rt, &gateway); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m"); |
| |
| r = sd_ndisc_router_route_get_prefixlen(rt, &prefixlen); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to get route prefix length: %m"); |
| |
| r = sd_ndisc_router_route_get_preference(rt, &preference); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to get default router preference from RA: %m"); |
| |
| r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); |
| |
| r = route_new(&route); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not allocate route: %m"); |
| |
| route->family = AF_INET6; |
| route->table = link_get_ipv6_accept_ra_route_table(link); |
| route->protocol = RTPROT_RA; |
| route->pref = preference; |
| route->gw.in6 = gateway; |
| route->dst_prefixlen = prefixlen; |
| route->lifetime = time_now + lifetime * USEC_PER_SEC; |
| |
| r = sd_ndisc_router_route_get_address(rt, &route->dst.in6); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to get route address: %m"); |
| |
| r = route_configure(route, link, ndisc_netlink_route_message_handler); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Could not set additional route: %m"); |
| link_enter_failed(link); |
| return r; |
| } |
| if (r > 0) |
| link->ndisc_messages++; |
| |
| return 0; |
| } |
| |
| static void ndisc_rdnss_hash_func(const NDiscRDNSS *x, struct siphash *state) { |
| siphash24_compress(&x->address, sizeof(x->address), state); |
| } |
| |
| static int ndisc_rdnss_compare_func(const NDiscRDNSS *a, const NDiscRDNSS *b) { |
| return memcmp(&a->address, &b->address, sizeof(a->address)); |
| } |
| |
| DEFINE_PRIVATE_HASH_OPS(ndisc_rdnss_hash_ops, NDiscRDNSS, ndisc_rdnss_hash_func, ndisc_rdnss_compare_func); |
| |
| static int ndisc_router_process_rdnss(Link *link, sd_ndisc_router *rt) { |
| uint32_t lifetime; |
| const struct in6_addr *a; |
| usec_t time_now; |
| int i, n, r; |
| |
| assert(link); |
| assert(rt); |
| |
| r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); |
| |
| r = sd_ndisc_router_rdnss_get_lifetime(rt, &lifetime); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to get RDNSS lifetime: %m"); |
| |
| n = sd_ndisc_router_rdnss_get_addresses(rt, &a); |
| if (n < 0) |
| return log_link_warning_errno(link, n, "Failed to get RDNSS addresses: %m"); |
| |
| for (i = 0; i < n; i++) { |
| _cleanup_free_ NDiscRDNSS *x = NULL; |
| NDiscRDNSS d = { |
| .address = a[i], |
| }, *y; |
| |
| if (lifetime == 0) { |
| (void) set_remove(link->ndisc_rdnss, &d); |
| link_dirty(link); |
| continue; |
| } |
| |
| y = set_get(link->ndisc_rdnss, &d); |
| if (y) { |
| y->valid_until = time_now + lifetime * USEC_PER_SEC; |
| continue; |
| } |
| |
| ndisc_vacuum(link); |
| |
| if (set_size(link->ndisc_rdnss) >= NDISC_RDNSS_MAX) { |
| log_link_warning(link, "Too many RDNSS records per link, ignoring."); |
| continue; |
| } |
| |
| r = set_ensure_allocated(&link->ndisc_rdnss, &ndisc_rdnss_hash_ops); |
| if (r < 0) |
| return log_oom(); |
| |
| x = new(NDiscRDNSS, 1); |
| if (!x) |
| return log_oom(); |
| |
| *x = (NDiscRDNSS) { |
| .address = a[i], |
| .valid_until = time_now + lifetime * USEC_PER_SEC, |
| }; |
| |
| r = set_put(link->ndisc_rdnss, x); |
| if (r < 0) |
| return log_oom(); |
| |
| TAKE_PTR(x); |
| |
| assert(r > 0); |
| link_dirty(link); |
| } |
| |
| return 0; |
| } |
| |
| static void ndisc_dnssl_hash_func(const NDiscDNSSL *x, struct siphash *state) { |
| siphash24_compress(NDISC_DNSSL_DOMAIN(x), strlen(NDISC_DNSSL_DOMAIN(x)), state); |
| } |
| |
| static int ndisc_dnssl_compare_func(const NDiscDNSSL *a, const NDiscDNSSL *b) { |
| return strcmp(NDISC_DNSSL_DOMAIN(a), NDISC_DNSSL_DOMAIN(b)); |
| } |
| |
| DEFINE_PRIVATE_HASH_OPS(ndisc_dnssl_hash_ops, NDiscDNSSL, ndisc_dnssl_hash_func, ndisc_dnssl_compare_func); |
| |
| static void ndisc_router_process_dnssl(Link *link, sd_ndisc_router *rt) { |
| _cleanup_strv_free_ char **l = NULL; |
| uint32_t lifetime; |
| usec_t time_now; |
| char **i; |
| int r; |
| |
| assert(link); |
| assert(rt); |
| |
| r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); |
| return; |
| } |
| |
| r = sd_ndisc_router_dnssl_get_lifetime(rt, &lifetime); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Failed to get RDNSS lifetime: %m"); |
| return; |
| } |
| |
| r = sd_ndisc_router_dnssl_get_domains(rt, &l); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Failed to get RDNSS addresses: %m"); |
| return; |
| } |
| |
| STRV_FOREACH(i, l) { |
| _cleanup_free_ NDiscDNSSL *s; |
| NDiscDNSSL *x; |
| |
| s = malloc0(ALIGN(sizeof(NDiscDNSSL)) + strlen(*i) + 1); |
| if (!s) { |
| log_oom(); |
| return; |
| } |
| |
| strcpy(NDISC_DNSSL_DOMAIN(s), *i); |
| |
| if (lifetime == 0) { |
| (void) set_remove(link->ndisc_dnssl, s); |
| link_dirty(link); |
| continue; |
| } |
| |
| x = set_get(link->ndisc_dnssl, s); |
| if (x) { |
| x->valid_until = time_now + lifetime * USEC_PER_SEC; |
| continue; |
| } |
| |
| ndisc_vacuum(link); |
| |
| if (set_size(link->ndisc_dnssl) >= NDISC_DNSSL_MAX) { |
| log_link_warning(link, "Too many DNSSL records per link, ignoring."); |
| continue; |
| } |
| |
| r = set_ensure_allocated(&link->ndisc_dnssl, &ndisc_dnssl_hash_ops); |
| if (r < 0) { |
| log_oom(); |
| return; |
| } |
| |
| s->valid_until = time_now + lifetime * USEC_PER_SEC; |
| |
| r = set_put(link->ndisc_dnssl, s); |
| if (r < 0) { |
| log_oom(); |
| return; |
| } |
| |
| s = NULL; |
| assert(r > 0); |
| link_dirty(link); |
| } |
| } |
| |
| static int ndisc_router_process_options(Link *link, sd_ndisc_router *rt) { |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(rt); |
| |
| r = sd_ndisc_router_option_rewind(rt); |
| for (;;) { |
| uint8_t type; |
| |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to iterate through options: %m"); |
| if (r == 0) /* EOF */ |
| break; |
| |
| r = sd_ndisc_router_option_get_type(rt, &type); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to get RA option type: %m"); |
| |
| switch (type) { |
| |
| case SD_NDISC_OPTION_PREFIX_INFORMATION: { |
| union in_addr_union a; |
| uint8_t flags; |
| |
| r = sd_ndisc_router_prefix_get_address(rt, &a.in6); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to get prefix address: %m"); |
| |
| if (set_contains(link->network->ndisc_black_listed_prefix, &a.in6)) { |
| if (DEBUG_LOGGING) { |
| _cleanup_free_ char *b = NULL; |
| |
| (void) in_addr_to_string(AF_INET6, &a, &b); |
| log_link_debug(link, "Prefix '%s' is black listed, ignoring", strna(b)); |
| } |
| |
| break; |
| } |
| |
| r = sd_ndisc_router_prefix_get_flags(rt, &flags); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to get RA prefix flags: %m"); |
| |
| if (link->network->ipv6_accept_ra_use_onlink_prefix && |
| FLAGS_SET(flags, ND_OPT_PI_FLAG_ONLINK)) |
| (void) ndisc_router_process_onlink_prefix(link, rt); |
| |
| if (link->network->ipv6_accept_ra_use_autonomous_prefix && |
| FLAGS_SET(flags, ND_OPT_PI_FLAG_AUTO)) |
| (void) ndisc_router_process_autonomous_prefix(link, rt); |
| |
| break; |
| } |
| |
| case SD_NDISC_OPTION_ROUTE_INFORMATION: |
| (void) ndisc_router_process_route(link, rt); |
| break; |
| |
| case SD_NDISC_OPTION_RDNSS: |
| if (link->network->ipv6_accept_ra_use_dns) |
| (void) ndisc_router_process_rdnss(link, rt); |
| break; |
| |
| case SD_NDISC_OPTION_DNSSL: |
| if (link->network->ipv6_accept_ra_use_dns) |
| (void) ndisc_router_process_dnssl(link, rt); |
| break; |
| } |
| |
| r = sd_ndisc_router_option_next(rt); |
| } |
| |
| return 0; |
| } |
| |
| static int ndisc_router_handler(Link *link, sd_ndisc_router *rt) { |
| uint64_t flags; |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->manager); |
| assert(rt); |
| |
| r = sd_ndisc_router_get_flags(rt, &flags); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to get RA flags: %m"); |
| |
| if (flags & (ND_RA_FLAG_MANAGED | ND_RA_FLAG_OTHER)) { |
| /* (re)start DHCPv6 client in stateful or stateless mode according to RA flags */ |
| r = dhcp6_request_address(link, !(flags & ND_RA_FLAG_MANAGED)); |
| if (r < 0 && r != -EBUSY) |
| log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease on NDisc request: %m"); |
| else { |
| log_link_debug(link, "Acquiring DHCPv6 lease on NDisc request"); |
| r = 0; |
| } |
| } |
| |
| (void) ndisc_router_process_default(link, rt); |
| (void) ndisc_router_process_options(link, rt); |
| |
| return r; |
| } |
| |
| static void ndisc_handler(sd_ndisc *nd, sd_ndisc_event event, sd_ndisc_router *rt, void *userdata) { |
| Link *link = userdata; |
| |
| assert(link); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return; |
| |
| switch (event) { |
| |
| case SD_NDISC_EVENT_ROUTER: |
| (void) ndisc_router_handler(link, rt); |
| break; |
| |
| case SD_NDISC_EVENT_TIMEOUT: |
| link->ndisc_configured = true; |
| link_check_ready(link); |
| |
| break; |
| default: |
| log_link_warning(link, "IPv6 Neighbor Discovery unknown event: %d", event); |
| } |
| } |
| |
| int ndisc_configure(Link *link) { |
| int r; |
| |
| assert(link); |
| |
| r = sd_ndisc_new(&link->ndisc); |
| if (r < 0) |
| return r; |
| |
| r = sd_ndisc_attach_event(link->ndisc, NULL, 0); |
| if (r < 0) |
| return r; |
| |
| r = sd_ndisc_set_mac(link->ndisc, &link->mac); |
| if (r < 0) |
| return r; |
| |
| r = sd_ndisc_set_ifindex(link->ndisc, link->ifindex); |
| if (r < 0) |
| return r; |
| |
| r = sd_ndisc_set_callback(link->ndisc, ndisc_handler, link); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| void ndisc_vacuum(Link *link) { |
| NDiscRDNSS *r; |
| NDiscDNSSL *d; |
| Iterator i; |
| usec_t time_now; |
| |
| assert(link); |
| |
| /* Removes all RDNSS and DNSSL entries whose validity time has passed */ |
| |
| time_now = now(clock_boottime_or_monotonic()); |
| |
| SET_FOREACH(r, link->ndisc_rdnss, i) |
| if (r->valid_until < time_now) { |
| free(set_remove(link->ndisc_rdnss, r)); |
| link_dirty(link); |
| } |
| |
| SET_FOREACH(d, link->ndisc_dnssl, i) |
| if (d->valid_until < time_now) { |
| free(set_remove(link->ndisc_dnssl, d)); |
| link_dirty(link); |
| } |
| } |
| |
| void ndisc_flush(Link *link) { |
| assert(link); |
| |
| /* Removes all RDNSS and DNSSL entries, without exception */ |
| |
| link->ndisc_rdnss = set_free_free(link->ndisc_rdnss); |
| link->ndisc_dnssl = set_free_free(link->ndisc_dnssl); |
| } |
| |
| int config_parse_ndisc_black_listed_prefix( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Network *network = data; |
| const char *p; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| if (isempty(rvalue)) { |
| network->ndisc_black_listed_prefix = set_free_free(network->ndisc_black_listed_prefix); |
| return 0; |
| } |
| |
| for (p = rvalue;;) { |
| _cleanup_free_ char *n = NULL; |
| _cleanup_free_ struct in6_addr *a = NULL; |
| union in_addr_union ip; |
| |
| r = extract_first_word(&p, &n, NULL, 0); |
| if (r < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, r, |
| "Failed to parse NDISC black listed prefix, ignoring assignment: %s", |
| rvalue); |
| return 0; |
| } |
| if (r == 0) |
| return 0; |
| |
| r = in_addr_from_string(AF_INET6, n, &ip); |
| if (r < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, r, |
| "NDISC black listed prefix is invalid, ignoring assignment: %s", n); |
| continue; |
| } |
| |
| if (set_contains(network->ndisc_black_listed_prefix, &ip.in6)) |
| continue; |
| |
| r = set_ensure_allocated(&network->ndisc_black_listed_prefix, &in6_addr_hash_ops); |
| if (r < 0) |
| return log_oom(); |
| |
| a = newdup(struct in6_addr, &ip.in6, 1); |
| if (!a) |
| return log_oom(); |
| |
| r = set_put(network->ndisc_black_listed_prefix, a); |
| if (r < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, r, |
| "Failed to store NDISC black listed prefix '%s', ignoring assignment: %m", n); |
| continue; |
| } |
| |
| TAKE_PTR(a); |
| } |
| |
| return 0; |
| } |