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networkd: VXLAN support keyword 'inherit' for TTL
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cd43199671
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@ -559,10 +559,10 @@
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<varlistentry>
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<term><varname>TTL=</varname></term>
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<listitem>
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<para>A fixed Time To Live N on Virtual eXtensible Local
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Area Network packets. N is a number in the range 1–255. 0
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is a special value meaning that packets inherit the TTL
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value.</para>
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<para>A fixed Time To Live N on Virtual eXtensible Local Area Network packets.
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Takes <literal>inherit</literal> or a number in the range 0–255. 0 is a special
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value meaning inherit the inner protocol's TTL value. <literal>inherit</literal>
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means that it will inherit the outer protocol's TTL value.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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@ -102,7 +102,7 @@ VXLAN.Group, config_parse_vxlan_address,
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VXLAN.Local, config_parse_vxlan_address, 0, offsetof(VxLan, local)
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VXLAN.Remote, config_parse_vxlan_address, 0, offsetof(VxLan, remote)
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VXLAN.TOS, config_parse_unsigned, 0, offsetof(VxLan, tos)
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VXLAN.TTL, config_parse_unsigned, 0, offsetof(VxLan, ttl)
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VXLAN.TTL, config_parse_vxlan_ttl, 0, offsetof(VxLan, ttl)
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VXLAN.MacLearning, config_parse_bool, 0, offsetof(VxLan, learning)
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VXLAN.ARPProxy, config_parse_bool, 0, offsetof(VxLan, arp_proxy)
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VXLAN.ReduceARPProxy, config_parse_bool, 0, offsetof(VxLan, arp_proxy)
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@ -65,7 +65,11 @@ static int netdev_vxlan_fill_message_create(NetDev *netdev, Link *link, sd_netli
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LINK attribute: %m");
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if (v->ttl != 0) {
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if (v->inherit) {
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r = sd_netlink_message_append_flag(m, IFLA_VXLAN_TTL_INHERIT);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_TTL_INHERIT attribute: %m");
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} else {
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r = sd_netlink_message_append_u8(m, IFLA_VXLAN_TTL, v->ttl);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_TTL attribute: %m");
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@ -288,6 +292,47 @@ int config_parse_flow_label(const char *unit,
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return 0;
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}
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int config_parse_vxlan_ttl(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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VxLan *v = userdata;
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unsigned f;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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if (streq(rvalue, "inherit"))
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v->inherit = true;
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else {
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r = safe_atou(rvalue, &f);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Failed to parse VXLAN TTL '%s', ignoring assignment: %m", rvalue);
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return 0;
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}
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if (f > 255) {
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log_syntax(unit, LOG_ERR, filename, line, 0,
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"Invalid VXLAN TTL '%s'. TTL must be <= 255. Ignoring assignment.", rvalue);
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return 0;
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}
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v->ttl = f;
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}
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return 0;
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}
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static int netdev_vxlan_verify(NetDev *netdev, const char *filename) {
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VxLan *v = VXLAN(netdev);
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@ -55,6 +55,7 @@ struct VxLan {
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bool remote_csum_rx;
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bool group_policy;
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bool generic_protocol_extension;
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bool inherit;
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struct ifla_vxlan_port_range port_range;
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};
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@ -69,3 +70,4 @@ CONFIG_PARSER_PROTOTYPE(config_parse_vxlan_address);
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CONFIG_PARSER_PROTOTYPE(config_parse_port_range);
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CONFIG_PARSER_PROTOTYPE(config_parse_flow_label);
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CONFIG_PARSER_PROTOTYPE(config_parse_df);
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CONFIG_PARSER_PROTOTYPE(config_parse_vxlan_ttl);
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