From: Susant Sahani <ssahani@gmail.com>
Date: Wed, 16 Aug 2023 17:07:48 +0000 (+0530)
Subject: network: static route - Allow to configure per route hop liimt
X-Git-Tag: v255-rc1~687^2~1
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=88c0642358398240a54d242e812439fcd0564b05;p=thirdparty%2Fsystemd.git

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

diff --git a/man/systemd.network.xml b/man/systemd.network.xml
index 2d9596dfe46..db9a9ac25d4 100644
--- a/man/systemd.network.xml
+++ b/man/systemd.network.xml
@@ -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>
diff --git a/src/network/networkd-network-gperf.gperf b/src/network/networkd-network-gperf.gperf
index d0214d131a1..c3f286e8bd3 100644
--- a/src/network/networkd-network-gperf.gperf
+++ b/src/network/networkd-network-gperf.gperf
@@ -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
diff --git a/src/network/networkd-route.c b/src/network/networkd-route.c
index a13ec818069..7af697c16d2 100644
--- a/src/network/networkd-route.c
+++ b/src/network/networkd-route.c
@@ -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,
diff --git a/src/network/networkd-route.h b/src/network/networkd-route.h
index f64d081fe26..3d85889a2fa 100644
--- a/src/network/networkd-route.h
+++ b/src/network/networkd-route.h
@@ -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);