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[ipv4] Add support for classless static routes

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Add support for RFC 3442 classless static routes provided via DHCP
option 121.

Originally-implemented-by: Hazel Smith <hazel.smith@leicester.ac.uk>
Originally-implemented-by: Raphael Pour <raphael.pour@hetzner.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2025-06-10 16:55:18 +01:00
parent e648d23fba
commit b5fb7353fa
5 changed files with 156 additions and 43 deletions
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29
src/tests/ipv4_test.c
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@@ -214,6 +214,17 @@ TESTNET ( net4,
{ "ip", "192.168.86.1" },
{ "netmask", "255.255.240.0" } );
/** net5: Static routes */
TESTNET ( net5,
{ "ip", "10.42.0.1" },
{ "netmask", "255.255.0.0" },
{ "gateway", "10.42.0.254" /* should be ignored */ },
{ "static-routes",
"19:0a:2b:2b:80:0a:2a:2b:2b:" /* 10.43.43.128/25 via 10.42.43.43 */
"10:c0:a8:0a:2a:c0:a8:" /* 192.168.0.0/16 via 10.42.192.168 */
"18:c0:a8:00:00:00:00:00:" /* 192.168.0.0/24 on-link */
"00:0a:2a:01:01" /* default via 10.42.1.1 */ } );
/**
* Perform IPv4 self-tests
*
@@ -327,6 +338,24 @@ static void ipv4_test_exec ( void ) {
testnet_remove_ok ( &net2 );
testnet_remove_ok ( &net1 );
testnet_remove_ok ( &net0 );
/* Static routes */
testnet_ok ( &net5 );
ipv4_route_ok ( "10.42.99.0", NULL,
"10.42.99.0", &net5, "10.42.0.1", 0 );
ipv4_route_ok ( "8.8.8.8", NULL,
"10.42.1.1", &net5, "10.42.0.1", 0 );
ipv4_route_ok ( "10.43.43.1", NULL,
"10.42.1.1", &net5, "10.42.0.1", 0 );
ipv4_route_ok ( "10.43.43.129", NULL,
"10.42.43.43", &net5, "10.42.0.1", 0 );
ipv4_route_ok ( "192.168.54.8", NULL,
"10.42.192.168", &net5, "10.42.0.1", 0 );
ipv4_route_ok ( "192.168.0.8", NULL,
"192.168.0.8", &net5, "10.42.0.1", 0 );
ipv4_route_ok ( "192.168.0.255", NULL,
"192.168.0.255", &net5, "10.42.0.1", 1 );
testnet_remove_ok ( &net5 );
}
/** IPv4 self-test */