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network: make RouteTable= setting can take multiple name:number pairs in a line

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Follow-up for c038ce4606.
This commit is contained in:
Yu Watanabe 2021-01-20 14:33:21 +09:00
parent e3f87b07bc
commit 310eff7274
2 changed files with 62 additions and 44 deletions
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13
man/networkd.conf.xml
View file

@ -72,11 +72,14 @@
<varlistentry>
<term><varname>RouteTable=</varname></term>
<listitem><para>Specifies the route table name. Takes a route name and table number separated with a
colon. (<literal><replaceable>name</replaceable>:<replaceable>integer</replaceable></literal>. The
route table number must be an integer in the range 1…4294967295. This setting can be specified
multiple times. If an empty string is specified, then all options specified earlier are cleared.
Defaults to unset.</para></listitem>
<listitem><para>Defines the route table name. Takes a whitespace-separated list of the pairs of
route table name and number. The route table name and number in each pair are separated with a
colon, i.e., <literal><replaceable>name</replaceable>:<replaceable>number</replaceable></literal>.
The route table name must not be <literal>default</literal>, <literal>main</literal>, or
<literal>local</literal>, as these route table names are predefined with route table number 253,
254, and 255, respectively. The route table number must be an integer in the range 1…4294967295.
This setting can be specified multiple times. If an empty string is specified, then the list
specified earlier are cleared. Defaults to unset.</para></listitem>
</varlistentry>
</variablelist>

93
src/network/networkd-route.c
View file

@ -2385,10 +2385,7 @@ int config_parse_route_table_names(
void *data,
void *userdata) {
_cleanup_free_ char *name = NULL;
Hashmap **s = data;
uint32_t table;
const char *p;
int r;
assert(filename);
@ -2401,47 +2398,65 @@ int config_parse_route_table_names(
return 0;
}
p = rvalue;
r = extract_first_word(&p, &name, ":", 0);
if (r == -ENOMEM)
return log_oom();
if (r <= 0 || isempty(p)) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Invalid RouteTable=, ignoring assignment: %s", rvalue);
return 0;
}
for (const char *p = rvalue;;) {
_cleanup_free_ char *name = NULL;
uint32_t table;
char *num;
if (STR_IN_SET(name, "default", "main","local")) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Route table name %s already preconfigured. Ignoring assignment: %s", name, rvalue);
return 0;
}
r = extract_first_word(&p, &name, NULL, 0);
if (r == -ENOMEM)
return log_oom();
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Invalid RouteTable=, ignoring assignment: %s", rvalue);
return 0;
}
if (r == 0)
return 0;
r = safe_atou32(p, &table);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to parse RouteTable=, ignoring assignment: %s", p);
return 0;
}
num = strchr(name, ':');
if (!num) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"Invalid route table name and number pair, ignoring assignment: %s", name);
continue;
}
if (table == 0) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"Invalid RouteTable=, ignoring assignment: %s", p);
return 0;
}
*num++ = '\0';
r = hashmap_ensure_put(s, &string_hash_ops, name, UINT32_TO_PTR(table));
if (r == -ENOMEM)
return log_oom();
if (r == -EEXIST) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Specified RouteTable= name and value pair conflicts with others, ignoring assignment: %s", rvalue);
return 0;
}
if (r > 0)
TAKE_PTR(name);
if (STR_IN_SET(name, "default", "main", "local")) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"Route table name %s already predefined. Ignoring assignment: %s:%s", name, name, num);
continue;
}
return 0;
r = safe_atou32(num, &table);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to parse route table number '%s', ignoring assignment: %s:%s", num, name, num);
continue;
}
if (table == 0) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"Invalid route table number, ignoring assignment: %s:%s", name, num);
continue;
}
r = hashmap_ensure_put(s, &string_hash_ops, name, UINT32_TO_PTR(table));
if (r == -ENOMEM)
return log_oom();
if (r == -EEXIST) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Specified route table name and number pair conflicts with others, ignoring assignment: %s:%s", name, num);
continue;
}
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to store route table name and number pair, ignoring assignment: %s:%s", name, num);
continue;
}
if (r > 0)
TAKE_PTR(name);
}
}
static int route_section_verify(Route *route, Network *network) {