mirror of
https://github.com/systemd/systemd-stable.git
synced 2025-02-03 13:47:04 +03:00
network: make ndisc related handlers return negative errno but caller ignore the errors
This commit is contained in:
Yu Watanabe
parent
e559eca1b6
commit
d5017c8410
@ -37,7 +37,7 @@ static int ndisc_route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *us
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return 1;
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}
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static void ndisc_router_process_default(Link *link, sd_ndisc_router *rt) {
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static int ndisc_router_process_default(Link *link, sd_ndisc_router *rt) {
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_cleanup_(route_freep) Route *route = NULL;
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struct in6_addr gateway;
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uint16_t lifetime;
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@ -52,70 +52,55 @@ static void ndisc_router_process_default(Link *link, sd_ndisc_router *rt) {
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assert(rt);
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r = sd_ndisc_router_get_lifetime(rt, &lifetime);
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if (r < 0) {
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log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m");
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return;
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}
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if (r < 0)
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return log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m");
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if (lifetime == 0) /* not a default router */
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return;
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return 0;
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r = sd_ndisc_router_get_address(rt, &gateway);
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if (r < 0) {
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log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m");
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return;
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}
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if (r < 0)
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return log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m");
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SET_FOREACH(address, link->addresses, i) {
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if (!memcmp(&gateway, &address->in_addr.in6,
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sizeof(address->in_addr.in6))) {
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SET_FOREACH(address, link->addresses, i)
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if (!memcmp(&gateway, &address->in_addr.in6, sizeof(address->in_addr.in6))) {
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char buffer[INET6_ADDRSTRLEN];
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log_link_debug(link, "No NDisc route added, gateway %s matches local address",
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inet_ntop(AF_INET6,
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&address->in_addr.in6,
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buffer, sizeof(buffer)));
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return;
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return 0;
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}
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}
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SET_FOREACH(address, link->addresses_foreign, i) {
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if (!memcmp(&gateway, &address->in_addr.in6,
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sizeof(address->in_addr.in6))) {
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SET_FOREACH(address, link->addresses_foreign, i)
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if (!memcmp(&gateway, &address->in_addr.in6, sizeof(address->in_addr.in6))) {
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char buffer[INET6_ADDRSTRLEN];
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log_link_debug(link, "No NDisc route added, gateway %s matches local address",
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inet_ntop(AF_INET6,
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&address->in_addr.in6,
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buffer, sizeof(buffer)));
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return;
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return 0;
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}
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}
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r = sd_ndisc_router_get_preference(rt, &preference);
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if (r < 0) {
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log_link_warning_errno(link, r, "Failed to get default router preference from RA: %m");
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return;
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}
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if (r < 0)
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return log_link_warning_errno(link, r, "Failed to get default router preference from RA: %m");
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r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now);
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if (r < 0) {
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log_link_warning_errno(link, r, "Failed to get RA timestamp: %m");
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return;
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}
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if (r < 0)
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return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m");
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r = sd_ndisc_router_get_mtu(rt, &mtu);
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if (r == -ENODATA)
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mtu = 0;
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else if (r < 0) {
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log_link_warning_errno(link, r, "Failed to get default router MTU from RA: %m");
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return;
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}
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else if (r < 0)
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return log_link_warning_errno(link, r, "Failed to get default router MTU from RA: %m");
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r = route_new(&route);
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if (r < 0) {
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log_link_error_errno(link, r, "Could not allocate route: %m");
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return;
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}
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if (r < 0)
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return log_link_error_errno(link, r, "Could not allocate route: %m");
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route->family = AF_INET6;
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route->table = link->network->ipv6_accept_ra_route_table;
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@ -130,13 +115,15 @@ static void ndisc_router_process_default(Link *link, sd_ndisc_router *rt) {
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if (r < 0) {
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log_link_warning_errno(link, r, "Could not set default route: %m");
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link_enter_failed(link);
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return;
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return r;
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}
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link->ndisc_messages++;
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return 0;
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}
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static void ndisc_router_process_autonomous_prefix(Link *link, sd_ndisc_router *rt) {
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static int ndisc_router_process_autonomous_prefix(Link *link, sd_ndisc_router *rt) {
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_cleanup_(address_freep) Address *address = NULL;
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Address *existing_address;
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uint32_t lifetime_valid, lifetime_preferred, lifetime_remaining;
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@ -148,45 +135,33 @@ static void ndisc_router_process_autonomous_prefix(Link *link, sd_ndisc_router *
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assert(rt);
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r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now);
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if (r < 0) {
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log_link_warning_errno(link, r, "Failed to get RA timestamp: %m");
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return;
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}
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if (r < 0)
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return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m");
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r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen);
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if (r < 0) {
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log_link_error_errno(link, r, "Failed to get prefix length: %m");
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return;
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}
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if (r < 0)
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return log_link_error_errno(link, r, "Failed to get prefix length: %m");
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r = sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime_valid);
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if (r < 0) {
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log_link_error_errno(link, r, "Failed to get prefix valid lifetime: %m");
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return;
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}
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if (r < 0)
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return log_link_error_errno(link, r, "Failed to get prefix valid lifetime: %m");
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r = sd_ndisc_router_prefix_get_preferred_lifetime(rt, &lifetime_preferred);
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if (r < 0) {
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log_link_error_errno(link, r, "Failed to get prefix preferred lifetime: %m");
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return;
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}
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if (r < 0)
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return log_link_error_errno(link, r, "Failed to get prefix preferred lifetime: %m");
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/* The preferred lifetime is never greater than the valid lifetime */
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if (lifetime_preferred > lifetime_valid)
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return;
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return 0;
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r = address_new(&address);
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if (r < 0) {
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log_link_error_errno(link, r, "Could not allocate address: %m");
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return;
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}
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if (r < 0)
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return log_link_error_errno(link, r, "Could not allocate address: %m");
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address->family = AF_INET6;
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r = sd_ndisc_router_prefix_get_address(rt, &address->in_addr.in6);
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if (r < 0) {
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log_link_error_errno(link, r, "Failed to get prefix address: %m");
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return;
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}
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if (r < 0)
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return log_link_error_errno(link, r, "Failed to get prefix address: %m");
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if (in_addr_is_null(AF_INET6, (const union in_addr_union *) &link->network->ipv6_token) == 0)
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memcpy(((char *)&address->in_addr.in6) + 8, ((char *)&link->network->ipv6_token) + 8, 8);
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@ -219,22 +194,24 @@ static void ndisc_router_process_autonomous_prefix(Link *link, sd_ndisc_router *
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} else if (lifetime_valid > 0)
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address->cinfo.ifa_valid = lifetime_valid;
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else
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return; /* see RFC4862 section 5.5.3.d */
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return 0; /* see RFC4862 section 5.5.3.d */
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if (address->cinfo.ifa_valid == 0)
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return;
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return 0;
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r = address_configure(address, link, ndisc_route_handler, true);
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if (r < 0) {
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log_link_warning_errno(link, r, "Could not set SLAAC address: %m");
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link_enter_failed(link);
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return;
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return r;
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}
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link->ndisc_messages++;
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return 0;
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}
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static void ndisc_router_process_onlink_prefix(Link *link, sd_ndisc_router *rt) {
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static int ndisc_router_process_onlink_prefix(Link *link, sd_ndisc_router *rt) {
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_cleanup_(route_freep) Route *route = NULL;
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usec_t time_now;
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uint32_t lifetime;
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@ -245,28 +222,20 @@ static void ndisc_router_process_onlink_prefix(Link *link, sd_ndisc_router *rt)
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assert(rt);
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r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now);
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if (r < 0) {
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log_link_warning_errno(link, r, "Failed to get RA timestamp: %m");
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return;
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}
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if (r < 0)
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return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m");
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r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen);
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if (r < 0) {
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log_link_error_errno(link, r, "Failed to get prefix length: %m");
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return;
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}
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if (r < 0)
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return log_link_error_errno(link, r, "Failed to get prefix length: %m");
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r = sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime);
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if (r < 0) {
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log_link_error_errno(link, r, "Failed to get prefix lifetime: %m");
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return;
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}
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if (r < 0)
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return log_link_error_errno(link, r, "Failed to get prefix lifetime: %m");
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r = route_new(&route);
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if (r < 0) {
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log_link_error_errno(link, r, "Could not allocate route: %m");
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return;
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}
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if (r < 0)
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return log_link_error_errno(link, r, "Could not allocate route: %m");
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route->family = AF_INET6;
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route->table = link->network->ipv6_accept_ra_route_table;
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@ -277,22 +246,22 @@ static void ndisc_router_process_onlink_prefix(Link *link, sd_ndisc_router *rt)
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route->lifetime = time_now + lifetime * USEC_PER_SEC;
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r = sd_ndisc_router_prefix_get_address(rt, &route->dst.in6);
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if (r < 0) {
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log_link_error_errno(link, r, "Failed to get prefix address: %m");
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return;
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}
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if (r < 0)
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return log_link_error_errno(link, r, "Failed to get prefix address: %m");
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r = route_configure(route, link, ndisc_route_handler);
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if (r < 0) {
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log_link_warning_errno(link, r, "Could not set prefix route: %m");
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link_enter_failed(link);
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return;
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return r;
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}
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link->ndisc_messages++;
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return 0;
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}
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static void ndisc_router_process_route(Link *link, sd_ndisc_router *rt) {
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static int ndisc_router_process_route(Link *link, sd_ndisc_router *rt) {
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_cleanup_(route_freep) Route *route = NULL;
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struct in6_addr gateway;
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uint32_t lifetime;
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@ -303,42 +272,31 @@ static void ndisc_router_process_route(Link *link, sd_ndisc_router *rt) {
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assert(link);
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r = sd_ndisc_router_route_get_lifetime(rt, &lifetime);
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if (r < 0) {
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log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m");
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return;
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}
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if (r < 0)
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return log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m");
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if (lifetime == 0)
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return;
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return 0;
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r = sd_ndisc_router_get_address(rt, &gateway);
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if (r < 0) {
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log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m");
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return;
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}
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if (r < 0)
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return log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m");
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r = sd_ndisc_router_route_get_prefixlen(rt, &prefixlen);
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if (r < 0) {
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log_link_warning_errno(link, r, "Failed to get route prefix length: %m");
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return;
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}
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if (r < 0)
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return log_link_warning_errno(link, r, "Failed to get route prefix length: %m");
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r = sd_ndisc_router_route_get_preference(rt, &preference);
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if (r < 0) {
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log_link_warning_errno(link, r, "Failed to get default router preference from RA: %m");
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return;
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}
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if (r < 0)
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return log_link_warning_errno(link, r, "Failed to get default router preference from RA: %m");
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r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now);
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if (r < 0) {
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log_link_warning_errno(link, r, "Failed to get RA timestamp: %m");
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return;
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}
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if (r < 0)
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return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m");
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r = route_new(&route);
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if (r < 0) {
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log_link_error_errno(link, r, "Could not allocate route: %m");
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return;
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}
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if (r < 0)
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return log_link_error_errno(link, r, "Could not allocate route: %m");
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route->family = AF_INET6;
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route->table = link->network->ipv6_accept_ra_route_table;
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@ -349,19 +307,19 @@ static void ndisc_router_process_route(Link *link, sd_ndisc_router *rt) {
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route->lifetime = time_now + lifetime * USEC_PER_SEC;
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r = sd_ndisc_router_route_get_address(rt, &route->dst.in6);
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if (r < 0) {
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log_link_error_errno(link, r, "Failed to get route address: %m");
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return;
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}
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if (r < 0)
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return log_link_error_errno(link, r, "Failed to get route address: %m");
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r = route_configure(route, link, ndisc_route_handler);
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if (r < 0) {
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log_link_warning_errno(link, r, "Could not set additional route: %m");
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link_enter_failed(link);
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return;
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return r;
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}
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link->ndisc_messages++;
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return 0;
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}
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static void ndisc_rdnss_hash_func(const void *p, struct siphash *state) {
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@ -381,7 +339,7 @@ static const struct hash_ops ndisc_rdnss_hash_ops = {
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.compare = ndisc_rdnss_compare_func
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};
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static void ndisc_router_process_rdnss(Link *link, sd_ndisc_router *rt) {
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static int ndisc_router_process_rdnss(Link *link, sd_ndisc_router *rt) {
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uint32_t lifetime;
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const struct in6_addr *a;
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usec_t time_now;
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@ -391,27 +349,22 @@ static void ndisc_router_process_rdnss(Link *link, sd_ndisc_router *rt) {
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assert(rt);
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r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now);
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if (r < 0) {
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log_link_warning_errno(link, r, "Failed to get RA timestamp: %m");
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return;
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}
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if (r < 0)
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return log_link_warning_errno(link, r, "Failed to get RA timestamp: %m");
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r = sd_ndisc_router_rdnss_get_lifetime(rt, &lifetime);
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if (r < 0) {
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log_link_warning_errno(link, r, "Failed to get RDNSS lifetime: %m");
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return;
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}
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if (r < 0)
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return log_link_warning_errno(link, r, "Failed to get RDNSS lifetime: %m");
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n = sd_ndisc_router_rdnss_get_addresses(rt, &a);
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if (n < 0) {
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log_link_warning_errno(link, n, "Failed to get RDNSS addresses: %m");
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return;
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}
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if (n < 0)
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return log_link_warning_errno(link, n, "Failed to get RDNSS addresses: %m");
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for (i = 0; i < n; i++) {
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_cleanup_free_ NDiscRDNSS *x = NULL;
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NDiscRDNSS d = {
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.address = a[i]
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}, *x;
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.address = a[i],
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}, *y;
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if (lifetime == 0) {
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(void) set_remove(link->ndisc_rdnss, &d);
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@ -419,9 +372,9 @@ static void ndisc_router_process_rdnss(Link *link, sd_ndisc_router *rt) {
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continue;
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}
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x = set_get(link->ndisc_rdnss, &d);
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if (x) {
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x->valid_until = time_now + lifetime * USEC_PER_SEC;
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y = set_get(link->ndisc_rdnss, &d);
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if (y) {
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y->valid_until = time_now + lifetime * USEC_PER_SEC;
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continue;
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}
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@ -433,30 +386,29 @@ static void ndisc_router_process_rdnss(Link *link, sd_ndisc_router *rt) {
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}
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r = set_ensure_allocated(&link->ndisc_rdnss, &ndisc_rdnss_hash_ops);
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if (r < 0) {
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log_oom();
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return;
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}
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if (r < 0)
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return log_oom();
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|
||||
x = new0(NDiscRDNSS, 1);
|
||||
if (!x) {
|
||||
log_oom();
|
||||
return;
|
||||
}
|
||||
x = new(NDiscRDNSS, 1);
|
||||
if (!x)
|
||||
return log_oom();
|
||||
|
||||
x->address = a[i];
|
||||
x->valid_until = time_now + lifetime * USEC_PER_SEC;
|
||||
*x = (NDiscRDNSS) {
|
||||
.address = a[i],
|
||||
.valid_until = time_now + lifetime * USEC_PER_SEC,
|
||||
};
|
||||
|
||||
r = set_put(link->ndisc_rdnss, x);
|
||||
if (r < 0) {
|
||||
free(x);
|
||||
log_oom();
|
||||
return;
|
||||
}
|
||||
if (r < 0)
|
||||
return log_oom();
|
||||
|
||||
TAKE_PTR(x);
|
||||
|
||||
assert(r > 0);
|
||||
link_dirty(link);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void ndisc_dnssl_hash_func(const void *p, struct siphash *state) {
|
||||
@ -590,25 +542,25 @@ static void ndisc_router_process_options(Link *link, sd_ndisc_router *rt) {
|
||||
}
|
||||
|
||||
if (flags & ND_OPT_PI_FLAG_ONLINK)
|
||||
ndisc_router_process_onlink_prefix(link, rt);
|
||||
(void) ndisc_router_process_onlink_prefix(link, rt);
|
||||
if (flags & ND_OPT_PI_FLAG_AUTO)
|
||||
ndisc_router_process_autonomous_prefix(link, rt);
|
||||
(void) ndisc_router_process_autonomous_prefix(link, rt);
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
case SD_NDISC_OPTION_ROUTE_INFORMATION:
|
||||
ndisc_router_process_route(link, rt);
|
||||
(void) ndisc_router_process_route(link, rt);
|
||||
break;
|
||||
|
||||
case SD_NDISC_OPTION_RDNSS:
|
||||
if (link->network->ipv6_accept_ra_use_dns)
|
||||
ndisc_router_process_rdnss(link, rt);
|
||||
(void) ndisc_router_process_rdnss(link, rt);
|
||||
break;
|
||||
|
||||
case SD_NDISC_OPTION_DNSSL:
|
||||
if (link->network->ipv6_accept_ra_use_dns)
|
||||
ndisc_router_process_dnssl(link, rt);
|
||||
(void) ndisc_router_process_dnssl(link, rt);
|
||||
break;
|
||||
}
|
||||
|
||||
@ -616,9 +568,9 @@ static void ndisc_router_process_options(Link *link, sd_ndisc_router *rt) {
|
||||
}
|
||||
}
|
||||
|
||||
static void ndisc_router_handler(Link *link, sd_ndisc_router *rt) {
|
||||
static int ndisc_router_handler(Link *link, sd_ndisc_router *rt) {
|
||||
uint64_t flags;
|
||||
int r;
|
||||
int r = 0;
|
||||
|
||||
assert(link);
|
||||
assert(link->network);
|
||||
@ -626,22 +578,24 @@ static void ndisc_router_handler(Link *link, sd_ndisc_router *rt) {
|
||||
assert(rt);
|
||||
|
||||
r = sd_ndisc_router_get_flags(rt, &flags);
|
||||
if (r < 0) {
|
||||
log_link_warning_errno(link, r, "Failed to get RA flags: %m");
|
||||
return;
|
||||
}
|
||||
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
|
||||
else {
|
||||
log_link_debug(link, "Acquiring DHCPv6 lease on NDisc request");
|
||||
r = 0;
|
||||
}
|
||||
}
|
||||
|
||||
ndisc_router_process_default(link, rt);
|
||||
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) {
|
||||
@ -655,7 +609,7 @@ static void ndisc_handler(sd_ndisc *nd, sd_ndisc_event event, sd_ndisc_router *r
|
||||
switch (event) {
|
||||
|
||||
case SD_NDISC_EVENT_ROUTER:
|
||||
ndisc_router_handler(link, rt);
|
||||
(void) ndisc_router_handler(link, rt);
|
||||
break;
|
||||
|
||||
case SD_NDISC_EVENT_TIMEOUT:
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user