static inline int env_changed(int *id)
{
int env_id = get_env_id();
if (*id != env_id) {
debug("env_id: %d -> %d\n", *id, env_id);
*id = env_id;
return 1;
}
return 0;
}
static int is_broadcast(struct in_addr ip)
{
static struct in_addr netmask;
static struct in_addr our_ip;
static int env_changed_id;
int env_id = get_env_id();
/* update only when the environment has changed */
if (env_changed_id != env_id) {
netmask = getenv_ip("netmask");
our_ip = getenv_ip("ipaddr");
env_changed_id = env_id;
}
return (ip.s_addr == ~0 || /* 255.255.255.255 (global bcast) */
((netmask.s_addr & our_ip.s_addr) ==
(netmask.s_addr & ip.s_addr) && /* on the same net and */
(netmask.s_addr | ip.s_addr) == ~0)); /* bcast to our net */
}
static void NetInitLoop(void)
{
static int env_changed_id;
int env_id = get_env_id();
/* update only when the environment has changed */
if (env_changed_id != env_id) {
NetOurIP = getenv_IPaddr("ipaddr");
NetOurGatewayIP = getenv_IPaddr("gatewayip");
NetOurSubnetMask = getenv_IPaddr("netmask");
NetServerIP = getenv_IPaddr("serverip");
NetOurNativeVLAN = getenv_VLAN("nvlan");
NetOurVLAN = getenv_VLAN("vlan");
#if defined(CONFIG_CMD_DNS)
NetOurDNSIP = getenv_IPaddr("dnsip");
#endif
env_changed_id = env_id;
}
memcpy(NetOurEther, eth_get_dev()->enetaddr, 6);
return;
}
static int refresh_settings_from_env(void)
{
const char *p;
static int env_changed_id;
int env_id = get_env_id();
/* update only when the environment has changed */
if (env_changed_id != env_id) {
if (getenv("ncip")) {
nc_ip = getenv_ip("ncip");
if (!nc_ip.s_addr)
return -1; /* ncip is 0.0.0.0 */
p = strchr(getenv("ncip"), ':');
if (p != NULL) {
nc_out_port = simple_strtoul(p + 1, NULL, 10);
nc_in_port = nc_out_port;
}
} else {
nc_ip.s_addr = ~0; /* ncip is not set, so broadcast */
}
p = getenv("ncoutport");
if (p != NULL)
nc_out_port = simple_strtoul(p, NULL, 10);
p = getenv("ncinport");
if (p != NULL)
nc_in_port = simple_strtoul(p, NULL, 10);
if (is_broadcast(nc_ip))
/* broadcast MAC address */
memset(nc_ether, 0xff, sizeof(nc_ether));
else
/* force arp request */
memset(nc_ether, 0, sizeof(nc_ether));
}
return 0;
}
