X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fodhcpd.git;a=blobdiff_plain;f=src%2Frouter.c;h=f964a82a813368a100eb2f888add88b6b40816fa;hp=89b1c520ab13d4a104e00a65d10dd7c1cf79771d;hb=0b45fce0859e4726e27f408016ef2f7d210c847f;hpb=053ca41a841aa4a1b1ce86ce6ee9f4304cba7027 diff --git a/src/router.c b/src/router.c index 89b1c52..f964a82 100644 --- a/src/router.c +++ b/src/router.c @@ -34,11 +34,12 @@ static void handle_icmpv6(void *addr, void *data, size_t len, static void trigger_router_advert(struct uloop_timeout *event); static void sigusr1_refresh(int signal); -static struct odhcpd_event router_event = {{.fd = -1}, handle_icmpv6}; +static struct odhcpd_event router_event = {{.fd = -1}, handle_icmpv6, NULL}; static FILE *fp_route = NULL; #define RA_IOV_LEN 6 +#define TIME_LEFT(t1, now) ((t1) != UINT32_MAX ? (t1) - (now) : UINT32_MAX) int init_router(void) { @@ -98,6 +99,9 @@ int setup_router_interface(struct interface *iface, bool enable) uloop_timeout_cancel(&iface->timer_rs); iface->timer_rs.cb = NULL; + if (iface->ifindex <= 0) + return -1; + setsockopt(router_event.uloop.fd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &all_nodes, sizeof(all_nodes)); setsockopt(router_event.uloop.fd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, @@ -114,7 +118,7 @@ int setup_router_interface(struct interface *iface, bool enable) forward_router_solicitation(iface); } else if (iface->ra == RELAYD_SERVER && !iface->master) { iface->timer_rs.cb = trigger_router_advert; - trigger_router_advert(&iface->timer_rs); + uloop_timeout_set(&iface->timer_rs, 1000); } if (iface->ra == RELAYD_RELAY || (iface->ra == RELAYD_SERVER && !iface->master)) @@ -209,6 +213,7 @@ static bool parse_routes(struct odhcpd_ipaddr *n, ssize_t len) // Router Advert server mode static uint64_t send_router_advert(struct interface *iface, const struct in6_addr *from) { + time_t now = odhcpd_time(); int mtu = odhcpd_get_interface_config(iface->ifname, "mtu"); int hlim = odhcpd_get_interface_config(iface->ifname, "hop_limit"); @@ -219,7 +224,7 @@ static uint64_t send_router_advert(struct interface *iface, const struct in6_add struct nd_router_advert h; struct icmpv6_opt lladdr; struct nd_opt_mtu mtu; - struct nd_opt_prefix_info prefix[RELAYD_MAX_PREFIXES]; + struct nd_opt_prefix_info prefix[sizeof(iface->ia_addr) / sizeof(*iface->ia_addr)]; } adv = { .h = {{.icmp6_type = ND_ROUTER_ADVERT, .icmp6_code = 0}, 0, 0}, .lladdr = {ND_OPT_SOURCE_LINKADDR, 1, {0}}, @@ -242,39 +247,35 @@ static uint64_t send_router_advert(struct interface *iface, const struct in6_add odhcpd_get_mac(iface, adv.lladdr.data); // If not currently shutting down - struct odhcpd_ipaddr addrs[RELAYD_MAX_PREFIXES]; + struct odhcpd_ipaddr addrs[8]; ssize_t ipcnt = 0; - uint64_t minvalid = UINT64_MAX; - uint64_t maxvalid = 0; + int64_t minvalid = INT64_MAX; // If not shutdown if (iface->timer_rs.cb) { - ipcnt = odhcpd_get_interface_addresses(iface->ifindex, - addrs, ARRAY_SIZE(addrs)); + ipcnt = iface->ia_addr_len; + memcpy(addrs, iface->ia_addr, ipcnt * sizeof(*addrs)); // Check default route - if (parse_routes(addrs, ipcnt) || iface->default_router > 1) - adv.h.nd_ra_router_lifetime = 1; + if (iface->default_router > 1) + adv.h.nd_ra_router_lifetime = htons(iface->default_router); + else if (parse_routes(addrs, ipcnt)) + adv.h.nd_ra_router_lifetime = htons(1); } // Construct Prefix Information options size_t cnt = 0; - struct in6_addr dns_pref = IN6ADDR_ANY_INIT, *dns_addr = &dns_pref; - uint32_t dns_time = 0; + struct in6_addr dns_pref, *dns_addr = &dns_pref; size_t dns_cnt = 1; + odhcpd_get_linklocal_interface_address(iface->ifindex, &dns_pref); + for (ssize_t i = 0; i < ipcnt; ++i) { struct odhcpd_ipaddr *addr = &addrs[i]; - if (addr->prefix > 96) + if (addr->prefix > 96 || addr->valid <= (uint32_t)now) continue; // Address not suitable - if (addr->preferred > MaxValidTime) - addr->preferred = MaxValidTime; - - if (addr->valid > MaxValidTime) - addr->valid = MaxValidTime; - struct nd_opt_prefix_info *p = NULL; for (size_t i = 0; i < cnt; ++i) { if (addr->prefix == adv.prefix[i].nd_opt_pi_prefix_len && @@ -290,15 +291,17 @@ static uint64_t send_router_advert(struct interface *iface, const struct in6_add p = &adv.prefix[cnt++]; } - if (addr->preferred > 0) { - if (minvalid > 1000ULL * addr->valid) - minvalid = 1000ULL * addr->valid; - - if (maxvalid < 1000ULL * addr->valid && (iface->default_router || - (addr->addr.s6_addr[0] & 0xfe) != 0xfc)) - maxvalid = 1000ULL * addr->valid; - } + if (addr->preferred > (uint32_t)now && + minvalid > 1000LL * TIME_LEFT(addr->valid, now)) + minvalid = 1000LL * TIME_LEFT(addr->valid, now); + uint32_t this_lifetime = TIME_LEFT(addr->valid, now); + if (this_lifetime > UINT16_MAX) + this_lifetime = UINT16_MAX; + if (((addr->addr.s6_addr[0] & 0xfe) != 0xfc || iface->default_router) + && adv.h.nd_ra_router_lifetime + && ntohs(adv.h.nd_ra_router_lifetime) < this_lifetime) + adv.h.nd_ra_router_lifetime = htons(this_lifetime); odhcpd_bmemcpy(&p->nd_opt_pi_prefix, &addr->addr, (iface->ra_advrouter) ? 128 : addr->prefix); @@ -312,16 +315,14 @@ static uint64_t send_router_advert(struct interface *iface, const struct in6_add p->nd_opt_pi_flags_reserved |= ND_OPT_PI_FLAG_AUTO; if (iface->ra_advrouter) p->nd_opt_pi_flags_reserved |= ND_OPT_PI_FLAG_RADDR; - p->nd_opt_pi_valid_time = htonl(addr->valid); - p->nd_opt_pi_preferred_time = htonl(addr->preferred); - - if (addr->preferred > dns_time) { - dns_time = addr->preferred; - dns_pref = addr->addr; - } + p->nd_opt_pi_valid_time = htonl(TIME_LEFT(addr->valid, now)); + if (addr->preferred > (uint32_t)now) + p->nd_opt_pi_preferred_time = htonl(TIME_LEFT(addr->preferred, now)); + else if (addr->valid - now < 7200) + p->nd_opt_pi_valid_time = 0; } - if (!maxvalid && !iface->default_router && adv.h.nd_ra_router_lifetime) { + if (!iface->default_router && adv.h.nd_ra_router_lifetime == htons(1)) { syslog(LOG_WARNING, "A default route is present but there is no public prefix " "on %s thus we don't announce a default route!", iface->ifname); adv.h.nd_ra_router_lifetime = 0; @@ -331,7 +332,6 @@ static uint64_t send_router_advert(struct interface *iface, const struct in6_add if (iface->dns_cnt > 0) { dns_addr = iface->dns; dns_cnt = iface->dns_cnt; - dns_time = 0; } if (!dns_addr || IN6_IS_ADDR_UNSPECIFIED(dns_addr)) @@ -343,7 +343,7 @@ static uint64_t send_router_advert(struct interface *iface, const struct in6_add uint8_t pad; uint8_t pad2; uint32_t lifetime; - } dns = {ND_OPT_RECURSIVE_DNS, (1 + (2 * dns_cnt)), 0, 0, htonl(dns_time)}; + } dns = {ND_OPT_RECURSIVE_DNS, (1 + (2 * dns_cnt)), 0, 0, 0}; @@ -392,7 +392,7 @@ static uint64_t send_router_advert(struct interface *iface, const struct in6_add for (ssize_t i = 0; i < ipcnt; ++i) { struct odhcpd_ipaddr *addr = &addrs[i]; - if (addr->dprefix > 64 || addr->dprefix == 0 || + if (addr->dprefix > 64 || addr->dprefix == 0 || addr->valid <= (uint32_t)now || (addr->dprefix == 64 && addr->prefix == 64)) { continue; // Address not suitable } else if (addr->dprefix > 32) { @@ -410,7 +410,7 @@ static uint64_t send_router_advert(struct interface *iface, const struct in6_add routes[routes_cnt].flags |= ND_RA_PREF_LOW; else if (iface->route_preference > 0) routes[routes_cnt].flags |= ND_RA_PREF_HIGH; - routes[routes_cnt].lifetime = htonl(addr->valid); + routes[routes_cnt].lifetime = htonl(TIME_LEFT(addr->valid, now)); routes[routes_cnt].addr[0] = addr->addr.s6_addr32[0]; routes[routes_cnt].addr[1] = addr->addr.s6_addr32[1]; routes[routes_cnt].addr[2] = 0; @@ -435,13 +435,9 @@ static uint64_t send_router_advert(struct interface *iface, const struct in6_add } minival = (maxival * 3) / 4; - if (adv.h.nd_ra_router_lifetime) - adv.h.nd_ra_router_lifetime = htons(maxvalid / 1000); - - search->lifetime = htonl(maxvalid / 1000); - if (!dns.lifetime) - dns.lifetime = search->lifetime; + search->lifetime = htonl(maxival / 100); + dns.lifetime = search->lifetime; odhcpd_urandom(&msecs, sizeof(msecs)); msecs = (labs(msecs) % (maxival - minival)) + minival; @@ -568,7 +564,7 @@ static void forward_router_advertisement(uint8_t *data, size_t len) size_t rewrite_cnt = iface->dns_cnt; if (rewrite_cnt == 0) { - if (odhcpd_get_preferred_interface_address(iface->ifindex, &addr) < 1) + if (odhcpd_get_linklocal_interface_address(iface->ifindex, &addr)) continue; // Unable to comply rewrite = &addr;