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network: make Route.Type= support local, broadcast, anycast, multicast, nat, and xresolve

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Closes #12975.
This commit is contained in:
Yu Watanabe 2019-07-07 09:40:17 +09:00
parent 7a22312d68
commit 94d6e29963
3 changed files with 29 additions and 1 deletions
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6
man/systemd.network.xml
View File

@ -1232,7 +1232,11 @@
<varlistentry>
<term><varname>Type=</varname></term>
<listitem>
<para>Specifies the type for the route. If <literal>unicast</literal>, a regular route is defined, i.e. a
<para>Specifies the type for the route. Takes one of <literal>unicast</literal>,
<literal>local</literal>, <literal>broadcast</literal>, <literal>anycast</literal>,
<literal>multicast</literal>, <literal>blackhole</literal>, <literal>unreachable</literal>,
<literal>prohibit</literal>, <literal>throw</literal>, <literal>nat</literal>, and
<literal>xresolve</literal>. If <literal>unicast</literal>, a regular route is defined, i.e. a
route indicating the path to take to a destination network address. If <literal>blackhole</literal>, packets
to the defined route are discarded silently. If <literal>unreachable</literal>, packets to the defined route
are discarded and the ICMP message "Host Unreachable" is generated. If <literal>prohibit</literal>, packets

22
src/network/networkd-route.c
View File

@ -719,6 +719,8 @@ int network_add_ipv4ll_route(Network *network) {
n->family = AF_INET;
n->dst_prefixlen = 16;
n->scope = RT_SCOPE_LINK;
n->scope_set = true;
n->table_set = true;
n->priority = IPV4LL_ROUTE_METRIC;
n->protocol = RTPROT_STATIC;
@ -752,10 +754,16 @@ int network_add_default_route_on_device(Network *network) {
static const char * const route_type_table[__RTN_MAX] = {
[RTN_UNICAST] = "unicast",
[RTN_LOCAL] = "local",
[RTN_BROADCAST] = "broadcast",
[RTN_ANYCAST] = "anycast",
[RTN_MULTICAST] = "multicast",
[RTN_BLACKHOLE] = "blackhole",
[RTN_UNREACHABLE] = "unreachable",
[RTN_PROHIBIT] = "prohibit",
[RTN_THROW] = "throw",
[RTN_NAT] = "nat",
[RTN_XRESOLVE] = "xresolve",
};
assert_cc(__RTN_MAX <= UCHAR_MAX);
@ -971,6 +979,7 @@ int config_parse_route_scope(
return 0;
}
n->scope_set = true;
TAKE_PTR(n);
return 0;
}
@ -1008,6 +1017,7 @@ int config_parse_route_table(
return 0;
}
n->table_set = true;
TAKE_PTR(n);
return 0;
}
@ -1371,6 +1381,18 @@ int route_section_verify(Route *route, Network *network) {
route->section->filename, route->section->line);
}
if (route->family != AF_INET6) {
if (!route->table_set && IN_SET(route->type, RTN_LOCAL, RTN_BROADCAST, RTN_ANYCAST, RTN_NAT))
route->table = RT_TABLE_LOCAL;
if (!route->scope_set) {
if (IN_SET(route->type, RTN_LOCAL, RTN_NAT))
route->scope = RT_SCOPE_HOST;
else if (IN_SET(route->type, RTN_BROADCAST, RTN_ANYCAST))
route->scope = RT_SCOPE_LINK;
}
}
if (network->n_static_addresses == 0 &&
in_addr_is_null(route->family, &route->gw) == 0 &&
route->gateway_onlink < 0) {

2
src/network/networkd-route.h
View File

@ -23,11 +23,13 @@ struct Route {
unsigned char dst_prefixlen;
unsigned char src_prefixlen;
unsigned char scope;
bool scope_set;
unsigned char protocol; /* RTPROT_* */
unsigned char type; /* RTN_* */
unsigned char tos;
uint32_t priority; /* note that ip(8) calls this 'metric' */
uint32_t table;
bool table_set;
uint32_t mtu;
uint32_t initcwnd;
uint32_t initrwnd;