[PATCHv5 04/13] net/lwip: implement dhcp cmd

[Maxim Uvarov]

On Thu, 3 Aug 2023 at 12:26, Ilias Apalodimas <ilias.apalodimas at linaro.org>
wrote:

> Hi Maxim,
>
> The split looks a lot easier to review!
>
> On Wed, Aug 02, 2023 at 08:06:49PM +0600, Maxim Uvarov wrote:
> > Signed-off-by: Maxim Uvarov <maxim.uvarov at linaro.org>
> > ---
> >  lib/lwip/Makefile              |  1 +
> >  lib/lwip/apps/dhcp/lwip-dhcp.c | 53 ++++++++++++++++++++++++++++++++++
> >  2 files changed, 54 insertions(+)
> >  create mode 100644 lib/lwip/apps/dhcp/lwip-dhcp.c
> >
> > diff --git a/lib/lwip/Makefile b/lib/lwip/Makefile
> > index 2815662093..a3521a9d18 100644
> > --- a/lib/lwip/Makefile
> > +++ b/lib/lwip/Makefile
> > @@ -65,4 +65,5 @@ obj-$(CONFIG_NET) += $(LWIPDIR)/netif/ethernet.o
> >  obj-$(CONFIG_NET) += port/if.o
> >  obj-$(CONFIG_NET) += port/sys-arch.o
> >
> > +obj-$(CONFIG_CMD_DHCP) += apps/dhcp/lwip-dhcp.o
> >  obj-$(CONFIG_CMD_DNS) += apps/dns/lwip-dns.o
> > diff --git a/lib/lwip/apps/dhcp/lwip-dhcp.c
> b/lib/lwip/apps/dhcp/lwip-dhcp.c
> > new file mode 100644
> > index 0000000000..9fda43db9f
> > --- /dev/null
> > +++ b/lib/lwip/apps/dhcp/lwip-dhcp.c
> > @@ -0,0 +1,53 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +
> > +/*
> > + * (C) Copyright 2023 Linaro Ltd. <maxim.uvarov at linaro.org>
> > + */
> > +
> > +#include <common.h>
> > +#include <command.h>
> > +#include <console.h>
> > +
> > +#include <lwip/dhcp.h>
> > +#include <lwip/prot/dhcp.h>
> > +
> > +#include "../../../lwip/ulwip.h"
>
> I think we had similar comments on the previous version, you need to get
> rid of this '../../../'
>
>
yes, sorry. Replaced everywhere to <ulwip.h>.  Header is already in the
path.



> > +
> > +static struct dhcp dhcp;
> > +static bool dhcp_is_set;
> > +
> > +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);
> > +
> > +     if (!dhcp_is_set) {
>
> Why do we need dhcp_is_set?  Can't we check using netif_get_client_data()?
>
>
yes, that works also.  changed.


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