Re: [lwip-devel] [PATCHv6 04/14] net/lwip: implement dhcp cmd

[Ilias Apalodimas]

On Mon, Aug 14, 2023 at 07:32:43PM +0600, Maxim Uvarov wrote:
> Implement function for dhcp command with lwIP variant. Usage and output is
> the same as the original command. This code called by compatibility code
> between U-Boot and lwIP.

Same as the dns command

> 
> Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>
> ---
>  include/net/lwip.h             | 10 +++++++
>  net/lwip/Makefile              |  1 +
>  net/lwip/apps/dhcp/lwip-dhcp.c | 51 ++++++++++++++++++++++++++++++++++
>  3 files changed, 62 insertions(+)
>  create mode 100644 net/lwip/apps/dhcp/lwip-dhcp.c
> 
> diff --git a/include/net/lwip.h b/include/net/lwip.h
> index c83b5c8231..2f035280eb 100644
> --- a/include/net/lwip.h
> +++ b/include/net/lwip.h
> @@ -15,3 +15,13 @@ int do_lwip_dns(struct cmd_tbl *cmdtp, int flag, int argc,
>  *         Other value < 0, if error
>  */
>  int ulwip_dns(char *name, char *varname);
> +
> +/*
> +* This function creates the DHCP request to obtain IP address. If DHCP server

Sphinx needs something more, please check the existing functions

> +* returns file name, this file will be downloaded with tftp.  After this
> +* function you need to invoke the polling loop to process network 
> communication.
> +*
> +* Return: 0 if success
> +*         Other value < 0, if error
> +*/
> +int ulwip_dhcp(void);
> diff --git a/net/lwip/Makefile b/net/lwip/Makefile
> index 6d2c00605b..59323fb325 100644
> --- a/net/lwip/Makefile
> +
> +static struct dhcp dhcp;
> +
> +static int ulwip_dhcp_tmo(void)
> +{
> +     switch (dhcp.state) {
> +     case DHCP_STATE_BOUND:
> +             env_set("bootfile", dhcp.boot_file_name);
> +             env_set("ipaddr", ip4addr_ntoa(&dhcp.offered_ip_addr));
> +             env_set("netmask", ip4addr_ntoa(&dhcp.offered_sn_mask));
> +             env_set("serverip", ip4addr_ntoa(&dhcp.server_ip_addr));
> +             printf("DHCP client bound to address %s\n", 
> ip4addr_ntoa(&dhcp.offered_ip_addr));
> +             break;
> +     default:
> +             return -1;
> +     }
> +
> +     return 0;
> +}
> +
> +int ulwip_dhcp(void)
> +{
> +     int err;
> +     struct netif *netif;
> +
> +     ulwip_set_tmo(ulwip_dhcp_tmo);
> +     netif = netif_get_by_index(1);

What's (1)?

> +
> +     if (!netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP))
> +             dhcp_set_struct(netif, &dhcp);
> +
> +     err = dhcp_start(netif);
> +     if (err)
> +             printf("dhcp_start error %d\n", err);
> +
> +     return err;
> +}
> -- 
> 2.30.2
> 

Thanks
/Ilias