lwip sitch from DHCP to static IP at runtime

RT-Thread use lwip to regard as tcpip prototol stack. So, you also can read EEPROM to get static ip ,and startup lwip.

At the same time, RT-Thread have "netdev" to manage "netif" in the lwIP. Therefore, you can use serial terminal to change the lwip dhcp state.

"netdev_set_if" and "ifconfig" can configure static IP address in the runtime.But you need make sure the "netdev" that your are using is not under "DHCP" state.

This is origin code : ifconfig

If you want to define a terminal command by yourself, the command can store IP address into EEPROM. You can use MSH_CMD_EXPORT_ALIAS and MSH_CMD_EXPORT to exprot user command(functions) to terminal.

Best wish to you.

Hi,

thank you for answer. Yes, I look into this direction, and I found ifconfig source. And, yes, I create test console command to try to change IP, but, I'm doing something wrong. I can't find command to turn DHCP off.
Here is my RT network config

and here is test code. If I turn off DHCP in configuration, code work like expected, but if I turn it on, I can't find a way to switch it off.

int test(void) {

    struct netdev *netdev = RT_NULL;
    ip_addr_t dns_addr;

    netdev = netdev_get_by_name("e0");
    if (netdev == RT_NULL) {
        rt_kprintf("bad network interface device name(e0).\n");
    }

    inet_aton("192.168.1.10", &dns_addr);
    if (netdev_set_dns_server(netdev, 0, &dns_addr) == RT_EOK) {
        rt_kprintf("set network interface device(%s) dns server #%d: %s\n", "e0", 0, "192.168.1.10");
    }

    inet_aton("192.168.1.251", &dns_addr);
    netdev_set_ipaddr(netdev, &dns_addr);

}

THX
Goran

Hi xiangxistu,

thank you for help, this done a trick, and work like charm.
Here is a test code if someone need it:

int dhcpDown(void) {

    struct netdev *netdev = RT_NULL;
    ip_addr_t dns_addr;

    netdev = netdev_get_by_name("e0");
    if (netdev == RT_NULL) {
        rt_kprintf("bad network interface device name(e0).\n");
    }

    netdev_dhcp_enabled(netdev, RT_FALSE);

    inet_aton("192.168.1.10", &dns_addr);
    if (netdev_set_dns_server(netdev, 0, &dns_addr) == RT_EOK) {
        rt_kprintf("set network interface device(%s) dns server #%d: %s\n", "e0", 0, "192.168.1.10");
    }
    inet_aton("192.168.1.251", &dns_addr);
    netdev_set_ipaddr(netdev, &dns_addr);

}

int dhcpUp(void) {
    struct netdev *netdev = RT_NULL;

    netdev = netdev_get_by_name("e0");
    if (netdev == RT_NULL) {
        rt_kprintf("bad network interface device name(e0).\n");
    }

    netdev_dhcp_enabled(netdev, RT_TRUE);
}


MSH_CMD_EXPORT(dhcpDown,  disable DHCP and set static IP);
MSH_CMD_EXPORT(dhcpUp,  enable DHCP);

Thank you again.

Ok, while we are here, I got another one question :)

I'm using CH32V307, and he does not have dedicated pins for network LED's. I try to find out in board files and low level functions to assign and enable this LEDs to have visual representation of network activity. Without RT Thread, I use WCHNET library and there is Ethernet_LED_LINKSET and Ethernet_LED_DATASET and this done a trick. This is lib external functions, but I can not find anything like this in RT.

Any idea how to do that?

THX
Goran