networkd: add support for configure IPv6 DAD
Configures Ipv6 Duplicate Address Detection. 10
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@ -1850,6 +1850,37 @@ static int link_set_ipv6_accept_ra(Link *link) {
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return 0;
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}
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static int link_set_ipv6_dad_transmits(Link *link) {
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char buf[DECIMAL_STR_MAX(unsigned) + 1];
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const char *p = NULL;
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int r;
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/* Make this a NOP if IPv6 is not available */
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if (!socket_ipv6_is_supported())
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return 0;
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if (link->flags & IFF_LOOPBACK)
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return 0;
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if (link->network->ipv6_dad_transmits < 0)
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return 0;
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p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
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xsprintf(buf, "%u", link->network->ipv6_dad_transmits);
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r = write_string_file(p, buf, 0);
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if (r < 0) {
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/* If the right value is set anyway, don't complain */
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if (verify_one_line_file(p, buf) > 0)
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return 0;
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log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
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}
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return 0;
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}
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static int link_configure(Link *link) {
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int r;
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@ -1877,6 +1908,10 @@ static int link_configure(Link *link) {
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if (r < 0)
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return r;
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r = link_set_ipv6_dad_transmits(link);
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if (r < 0)
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return r;
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if (link_ipv4ll_enabled(link)) {
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r = ipv4ll_configure(link);
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if (r < 0)
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@ -51,6 +51,7 @@ Network.IPForward, config_parse_address_family_boolean_with
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Network.IPMasquerade, config_parse_bool, 0, offsetof(Network, ip_masquerade)
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Network.IPv6PrivacyExtensions, config_parse_ipv6_privacy_extensions, 0, offsetof(Network, ipv6_privacy_extensions)
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Network.IPv6AcceptRouterAdvertisements, config_parse_tristate, 0, offsetof(Network, ipv6_accept_ra)
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Network.IPv6DuplicateAddressDetection, config_parse_int, 0, offsetof(Network, ipv6_dad_transmits)
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Network.BindCarrier, config_parse_strv, 0, offsetof(Network, bind_carrier)
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Address.Address, config_parse_address, 0, 0
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Address.Peer, config_parse_address, 0, 0
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@ -121,6 +121,7 @@ static int network_load_one(Manager *manager, const char *filename) {
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network->ipv6_privacy_extensions = IPV6_PRIVACY_EXTENSIONS_NO;
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network->ipv6_accept_ra = -1;
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network->ipv6_dad_transmits = -1;
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r = config_parse(NULL, filename, file,
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"Match\0"
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@ -121,6 +121,7 @@ struct Network {
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bool ip_masquerade;
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int ipv6_accept_ra;
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int ipv6_dad_transmits;
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union in_addr_union ipv6_token;
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IPv6PrivacyExtensions ipv6_privacy_extensions;
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