X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fodhcpd.git;a=blobdiff_plain;f=src%2Frouter.c;h=1ae8d1aa7543d0ef1fff0e6c02dcc44ee69fbb33;hp=3d26c5845fd96a08d2ddf1ca7bd7340d1b318481;hb=2fd5d19525699f19186daca9b246dd37a0f547a0;hpb=d94b406eeba27af2a6abff333dc16e82d28ed636 diff --git a/src/router.c b/src/router.c index 3d26c58..1ae8d1a 100644 --- a/src/router.c +++ b/src/router.c @@ -37,7 +37,9 @@ static void sigusr1_refresh(int signal); static struct odhcpd_event router_event = {{.fd = -1}, handle_icmpv6}; 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) { @@ -113,7 +115,7 @@ 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)) @@ -176,7 +178,7 @@ static bool parse_routes(struct odhcpd_ipaddr *n, ssize_t len) char line[512], ifname[16]; bool found_default = false; - struct odhcpd_ipaddr p = {IN6ADDR_ANY_INIT, 0, 0, false, 0, 0, 0}; + struct odhcpd_ipaddr p = {IN6ADDR_ANY_INIT, 0, 0, 0, 0}; while (fgets(line, sizeof(line), fp_route)) { uint32_t rflags; if (sscanf(line, "00000000000000000000000000000000 00 " @@ -205,25 +207,30 @@ static bool parse_routes(struct odhcpd_ipaddr *n, ssize_t len) return found_default; } - // Router Advert server mode static uint64_t send_router_advert(struct interface *iface, const struct in6_addr *from) { - int mtu = odhcpd_get_interface_mtu(iface->ifname); - if (mtu < 0) - mtu = 1500; + time_t now = odhcpd_time(); + int mtu = odhcpd_get_interface_config(iface->ifname, "mtu"); + int hlim = odhcpd_get_interface_config(iface->ifname, "hop_limit"); + + if (mtu < 1280) + mtu = 1280; struct { 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}}, .mtu = {ND_OPT_MTU, 1, 0, htonl(mtu)}, }; + if (hlim > 0) + adv.h.nd_ra_curhoplimit = hlim; + if (iface->dhcpv6) adv.h.nd_ra_flags_reserved = ND_RA_FLAG_OTHER; @@ -237,23 +244,24 @@ 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 = NULL; ssize_t ipcnt = 0; - uint64_t maxpreferred = 0; + int64_t minvalid = INT64_MAX; + int64_t maxvalid = 0; // If not shutdown if (iface->timer_rs.cb) { - ipcnt = odhcpd_get_interface_addresses(iface->ifindex, - addrs, ARRAY_SIZE(addrs)); + addrs = iface->ia_addr; + ipcnt = iface->ia_addr_len; // Check default route - if (parse_routes(addrs, ipcnt) || iface->default_router > 1) - adv.h.nd_ra_router_lifetime = - htons(3 * MaxRtrAdvInterval); + if (parse_routes(addrs, ipcnt)) + adv.h.nd_ra_router_lifetime = htons(1); + if (iface->default_router > 1) + adv.h.nd_ra_router_lifetime = htons(iface->default_router); } // Construct Prefix Information options - bool have_public = false; size_t cnt = 0; struct in6_addr dns_pref = IN6ADDR_ANY_INIT, *dns_addr = &dns_pref; @@ -262,15 +270,9 @@ 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->prefix > 96 || addr->has_class) + if (addr->prefix > 96 || addr->valid <= (uint32_t)now) continue; // Address not suitable - if (addr->preferred > MaxPreferredTime) - addr->preferred = MaxPreferredTime; - - 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 && @@ -286,12 +288,16 @@ static uint64_t send_router_advert(struct interface *iface, const struct in6_add p = &adv.prefix[cnt++]; } - if ((addr->addr.s6_addr[0] & 0xfe) != 0xfc && addr->preferred > 0) { - have_public = true; + if (addr->preferred > (uint32_t)now && + minvalid > 1000LL * TIME_LEFT(addr->valid, now)) + minvalid = 1000LL * TIME_LEFT(addr->valid, now); - if (maxpreferred < 1000 * addr->preferred) - maxpreferred = 1000 * addr->preferred; - } + if (maxvalid < 1000LL * TIME_LEFT(addr->valid, now)) + maxvalid = 1000LL * TIME_LEFT(addr->valid, now); + + if (((addr->addr.s6_addr[0] & 0xfe) != 0xfc || iface->default_router) + && ntohs(adv.h.nd_ra_router_lifetime) < TIME_LEFT(addr->valid, now)) + adv.h.nd_ra_router_lifetime = htons(TIME_LEFT(addr->valid, now)); odhcpd_bmemcpy(&p->nd_opt_pi_prefix, &addr->addr, (iface->ra_advrouter) ? 128 : addr->prefix); @@ -305,16 +311,20 @@ 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); + 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 (addr->preferred > dns_time) { - dns_time = addr->preferred; + if (TIME_LEFT(addr->preferred, now) > dns_time) { + dns_time = TIME_LEFT(addr->preferred, now); dns_pref = addr->addr; } } - if (!have_public && !iface->default_router && adv.h.nd_ra_router_lifetime) { + if (!iface->default_router && ntohs(adv.h.nd_ra_router_lifetime) == 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; @@ -324,7 +334,7 @@ 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 = 2 * MaxRtrAdvInterval; + dns_time = 0; } if (!dns_addr || IN6_IS_ADDR_UNSPECIFIED(dns_addr)) @@ -369,7 +379,6 @@ static uint64_t send_router_advert(struct interface *iface, const struct in6_add search->len = search_len ? ((sizeof(*search) + search_padded) / 8) : 0; search->pad = 0; search->pad2 = 0; - search->lifetime = htonl(2 * MaxRtrAdvInterval);; memcpy(search->name, search_domain, search_len); memset(&search->name[search_len], 0, search_padded - search_len); @@ -386,7 +395,7 @@ 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) { @@ -404,7 +413,7 @@ 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; @@ -415,20 +424,26 @@ static uint64_t send_router_advert(struct interface *iface, const struct in6_add // Calculate periodic transmit int msecs = 0; - uint32_t maxival = MaxRtrAdvInterval * 1000; - uint32_t minival = MinRtrAdvInterval * 1000; + uint32_t maxival = iface->ra_maxinterval * 1000; + uint32_t minival; + + if (maxival < 4000 || maxival > MaxRtrAdvInterval * 1000) + maxival = MaxRtrAdvInterval * 1000; + + if (maxival > minvalid / 3) { + maxival = minvalid / 3; - if (maxpreferred > 0 && maxival > maxpreferred / 2) { - maxival = maxpreferred / 2; if (maxival < 4000) maxival = 4000; - - if (maxival >= 9000) - minival = maxival / 3; - else - minival = (maxival * 3) / 4; } + minival = (maxival * 3) / 4; + + search->lifetime = htonl(maxvalid / 1000); + + if (!dns.lifetime) + dns.lifetime = search->lifetime; + odhcpd_urandom(&msecs, sizeof(msecs)); msecs = (labs(msecs) % (maxival - minival)) + minival; @@ -438,7 +453,8 @@ static uint64_t send_router_advert(struct interface *iface, const struct in6_add .data = {0, 0, maxival >> 24, maxival >> 16, maxival >> 8, maxival} }; - struct iovec iov[] = {{&adv, (uint8_t*)&adv.prefix[cnt] - (uint8_t*)&adv}, + struct iovec iov[RA_IOV_LEN] = { + {&adv, (uint8_t*)&adv.prefix[cnt] - (uint8_t*)&adv}, {&routes, routes_cnt * sizeof(*routes)}, {&dns, (dns_cnt) ? sizeof(dns) : 0}, {dns_addr, dns_cnt * sizeof(*dns_addr)},