diff options
Diffstat (limited to 'src/network/networkd-ndisc.c')
| -rw-r--r-- | src/network/networkd-ndisc.c | 148 |
1 files changed, 146 insertions, 2 deletions
diff --git a/src/network/networkd-ndisc.c b/src/network/networkd-ndisc.c index 68277d6ad4..126f9c0fe9 100644 --- a/src/network/networkd-ndisc.c +++ b/src/network/networkd-ndisc.c @@ -27,12 +27,129 @@ #include "networkd-link.h" +static int ndisc_netlink_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { + _cleanup_link_unref_ Link *link = userdata; + int r; + + assert(link); + assert(link->ndisc_messages > 0); + + link->ndisc_messages --; + + 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); + } + + if (link->ndisc_messages == 0) { + link->ndisc_configured = true; + link_check_ready(link); + } + + return 1; +} + +static void ndisc_prefix_autonomous_handler(sd_ndisc *nd, const struct in6_addr *prefix, unsigned prefixlen, + unsigned lifetime_preferred, unsigned lifetime_valid, void *userdata) { + _cleanup_address_free_ Address *address = NULL; + Link *link = userdata; + usec_t time_now; + int r; + + assert(nd); + assert(link); + assert(link->network); + + if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) + return; + + r = address_new(&address); + if (r < 0) { + log_link_error_errno(link, r, "Could not allocate address: %m"); + return; + } + + assert_se(sd_event_now(link->manager->event, clock_boottime_or_monotonic(), &time_now) >= 0); + + address->family = AF_INET6; + address->in_addr.in6 = *prefix; + if (in_addr_is_null(AF_INET6, (const union in_addr_union *) &link->network->ipv6_token) == 0) + memcpy(&address->in_addr.in6 + 8, &link->network->ipv6_token + 8, 8); + else { + /* see RFC4291 section 2.5.1 */ + address->in_addr.in6.__in6_u.__u6_addr8[8] = link->mac.ether_addr_octet[0]; + address->in_addr.in6.__in6_u.__u6_addr8[8] ^= 1 << 1; + address->in_addr.in6.__in6_u.__u6_addr8[9] = link->mac.ether_addr_octet[1]; + address->in_addr.in6.__in6_u.__u6_addr8[10] = link->mac.ether_addr_octet[2]; + address->in_addr.in6.__in6_u.__u6_addr8[11] = 0xff; + address->in_addr.in6.__in6_u.__u6_addr8[12] = 0xfe; + address->in_addr.in6.__in6_u.__u6_addr8[13] = link->mac.ether_addr_octet[3]; + address->in_addr.in6.__in6_u.__u6_addr8[14] = link->mac.ether_addr_octet[4]; + address->in_addr.in6.__in6_u.__u6_addr8[15] = link->mac.ether_addr_octet[5]; + } + address->prefixlen = prefixlen; + address->flags = IFA_F_NOPREFIXROUTE; + address->cinfo.ifa_prefered = lifetime_preferred; + address->cinfo.ifa_valid = lifetime_valid; + + r = address_configure(address, link, ndisc_netlink_handler, true); + if (r < 0) { + log_link_warning_errno(link, r, "Could not set SLAAC address: %m"); + link_enter_failed(link); + return; + } + + link->ndisc_messages ++; +} + +static void ndisc_prefix_onlink_handler(sd_ndisc *nd, const struct in6_addr *prefix, unsigned prefixlen, unsigned lifetime, void *userdata) { + _cleanup_route_free_ Route *route = NULL; + Link *link = userdata; + usec_t time_now; + int r; + + assert(nd); + assert(link); + + if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) + return; + + r = route_new(&route); + if (r < 0) { + log_link_error_errno(link, r, "Could not allocate route: %m"); + return; + } + + assert_se(sd_event_now(link->manager->event, clock_boottime_or_monotonic(), &time_now) >= 0); + + route->family = AF_INET6; + route->table = RT_TABLE_MAIN; + route->protocol = RTPROT_RA; + route->flags = RTM_F_PREFIX; + route->dst.in6 = *prefix; + route->dst_prefixlen = prefixlen; + route->lifetime = time_now + lifetime * USEC_PER_SEC; + + r = route_configure(route, link, ndisc_netlink_handler); + if (r < 0) { + log_link_warning_errno(link, r, "Could not set prefix route: %m"); + link_enter_failed(link); + return; + } + + link->ndisc_messages ++; +} + static void ndisc_router_handler(sd_ndisc *nd, uint8_t flags, const struct in6_addr *gateway, unsigned lifetime, int pref, void *userdata) { + _cleanup_route_free_ Route *route = NULL; Link *link = userdata; + usec_t time_now; int r; assert(link); assert(link->network); + assert(link->manager); if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) return; @@ -45,6 +162,33 @@ static void ndisc_router_handler(sd_ndisc *nd, uint8_t flags, const struct in6_a if (r < 0 && r != -EALREADY) log_link_warning_errno(link, r, "Starting DHCPv6 client on NDisc request failed: %m"); } + + if (!gateway) + return; + + r = route_new(&route); + if (r < 0) { + log_link_error_errno(link, r, "Could not allocate route: %m"); + return; + } + + assert_se(sd_event_now(link->manager->event, clock_boottime_or_monotonic(), &time_now) >= 0); + + route->family = AF_INET6; + route->table = RT_TABLE_MAIN; + route->protocol = RTPROT_RA; + route->pref = pref; + route->gw.in6 = *gateway; + route->lifetime = time_now + lifetime * USEC_PER_SEC; + + r = route_configure(route, link, ndisc_netlink_handler); + if (r < 0) { + log_link_warning_errno(link, r, "Could not set default route: %m"); + link_enter_failed(link); + return; + } + + link->ndisc_messages ++; } static void ndisc_handler(sd_ndisc *nd, int event, void *userdata) { @@ -94,8 +238,8 @@ int ndisc_configure(Link *link) { r = sd_ndisc_set_callback(link->ndisc_router_discovery, ndisc_router_handler, - NULL, - NULL, + ndisc_prefix_onlink_handler, + ndisc_prefix_autonomous_handler, ndisc_handler, link); 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