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network: static route - Allow to configure per route hop liimt

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This commit is contained in:
Susant Sahani 2023-08-16 22:37:48 +05:30
parent c068650fcf
commit 88c0642358
4 changed files with 70 additions and 0 deletions
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7
man/systemd.network.xml
View file

@ -1617,6 +1617,13 @@ allow my_server_t localnet_peer_t:peer recv;</programlisting>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>HopLimit=</varname></term>
<listitem>
<para> Configures per route hop limit. See also <varname>IPv6HopLimit=</varname>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>Protocol=</varname></term>
<listitem>

1
src/network/networkd-network-gperf.gperf
View file

@ -197,6 +197,7 @@ Route.IPv6Preference, config_parse_ipv6_route_preference,
Route.Protocol, config_parse_route_protocol, 0, 0
Route.Type, config_parse_route_type, 0, 0
Route.TCPRetransmissionTimeOutSec, config_parse_route_tcp_rto, 0, 0
Route.HopLimit, config_parse_route_hop_limit, 0, 0
Route.InitialCongestionWindow, config_parse_route_tcp_window, 0, 0
Route.InitialAdvertisedReceiveWindow, config_parse_route_tcp_window, 0, 0
Route.TCPAdvertisedMaximumSegmentSize, config_parse_tcp_advmss, 0, 0

61
src/network/networkd-route.c
View file

@ -2532,6 +2532,67 @@ int config_parse_route_type(
return 0;
}
int config_parse_route_hop_limit(
const char *unit,
const char *filename,
unsigned line,
const char *section,
unsigned section_line,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata) {
_cleanup_(route_free_or_set_invalidp) Route *n = NULL;
Network *network = userdata;
uint32_t k;
int r;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
r = route_new_static(network, filename, section_line, &n);
if (r == -ENOMEM)
return log_oom();
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to allocate route, ignoring assignment: %m");
return 0;
}
if (isempty(rvalue)) {
n->hop_limit = 0;
TAKE_PTR(n);
return 0;
}
r = safe_atou32(rvalue, &k);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Could not parse route hop limit %s \"%s\", ignoring assignment: %m", lvalue, rvalue);
return 0;
}
if (k > 255) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"Specified route hop limit %s \"%s\" is too large, ignoring assignment: %m", lvalue, rvalue);
return 0;
}
if (k == 0) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"Invalid route hop limit %s \"%s\", ignoring assignment: %m", lvalue, rvalue);
return 0;
}
n->hop_limit = k;
TAKE_PTR(n);
return 0;
}
int config_parse_tcp_congestion(
const char *unit,
const char *filename,

1
src/network/networkd-route.h
View file

@ -125,6 +125,7 @@ CONFIG_PARSER_PROTOTYPE(config_parse_ipv6_route_preference);
CONFIG_PARSER_PROTOTYPE(config_parse_route_protocol);
CONFIG_PARSER_PROTOTYPE(config_parse_route_type);
CONFIG_PARSER_PROTOTYPE(config_parse_route_tcp_window);
CONFIG_PARSER_PROTOTYPE(config_parse_route_hop_limit);
CONFIG_PARSER_PROTOTYPE(config_parse_tcp_window);
CONFIG_PARSER_PROTOTYPE(config_parse_route_tcp_rto);
CONFIG_PARSER_PROTOTYPE(config_parse_route_mtu);