genode/repos/dde_linux/patches/lxip_ip_config.patch
2024-08-27 15:33:31 +02:00

74 lines
2.2 KiB
Diff

This patch makes the boot DHCP re-connectable.
diff --git src/linux/net/ipv4/ipconfig.c src/linux/net/ipv4/ipconfig.c
index c56b6fe6f..cdb9cd83e 100644
--- src/linux/net/ipv4/ipconfig.c
+++ src/linux/net/ipv4/ipconfig.c
@@ -130,7 +130,7 @@ int ic_proto_enabled __initdata = 0
static int ic_host_name_set __initdata; /* Host name set by us? */
__be32 ic_myaddr = NONE; /* My IP address */
-static __be32 ic_netmask = NONE; /* Netmask for local subnet */
+__be32 ic_netmask = NONE; /* Netmask for local subnet */
__be32 ic_gateway = NONE; /* Gateway IP address */
#ifdef IPCONFIG_DYNAMIC
@@ -156,7 +156,7 @@ static int ic_proto_used; /* Protocol used, if any */
#else
#define ic_proto_used 0
#endif
-static __be32 ic_nameservers[CONF_NAMESERVERS_MAX]; /* DNS Server IP addresses */
+__be32 ic_nameservers[CONF_NAMESERVERS_MAX]; /* DNS Server IP addresses */
static __be32 ic_ntp_servers[CONF_NTP_SERVERS_MAX]; /* NTP server IP addresses */
static u8 ic_domain[64]; /* DNS (not NIS) domain name */
@@ -431,6 +431,33 @@ static int __init ic_setup_routes(void)
return 0;
}
+static int __init ic_delete_routes(void)
+{
+ /* No need to delete device routes, only the default route... */
+
+ if (ic_gateway != NONE) {
+ struct rtentry rm;
+ int err;
+
+ memset(&rm, 0, sizeof(rm));
+ if ((ic_gateway ^ ic_myaddr) & ic_netmask) {
+ pr_err("IP-Config: Gateway not on directly connected network\n");
+ return -1;
+ }
+ set_sockaddr((struct sockaddr_in *) &rm.rt_dst, 0, 0);
+ set_sockaddr((struct sockaddr_in *) &rm.rt_genmask, 0, 0);
+ set_sockaddr((struct sockaddr_in *) &rm.rt_gateway, ic_gateway, 0);
+ rm.rt_flags = RTF_UP | RTF_GATEWAY;
+ if ((err = ip_rt_ioctl(&init_net, SIOCDELRT, &rm)) < 0) {
+ pr_err("IP-Config: Cannot delete default route (%d)\n",
+ err);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
/*
* Fill in default values for all missing parameters.
*/
@@ -1725,6 +1752,14 @@ static int __init ip_auto_config_setup(char *addrs)
ic_set_manually = 1;
ic_enable = 1;
+ ic_delete_routes();
+
+ ic_myaddr = NONE;
+ ic_netmask = NONE;
+ ic_gateway = NONE;
+ ic_servaddr = NONE;
+ ic_got_reply = 0;
+
/*
* If any dhcp, bootp etc options are set, leave autoconfig on
* and skip the below static IP processing.