[PATCHv6 07/14] net/lwip: implement ping cmd

[Ilias Apalodimas]

On Mon, Aug 14, 2023 at 07:32:46PM +0600, Maxim Uvarov wrote:
>  * can return immediately if previous request was cached or it might require
> @@ -38,3 +39,28 @@ int ulwip_dhcp(void);
>  *         !0 if error
>  */
>  int ulwip_wget(ulong addr, char *url);
> +
> +/**
> + * ulwip_tftp() - load file with tftp
> + *
> + * Load file with tftp to specific address
> + *
> + * @param addr - address to store downloaded file
> + * @param filename - file name on remote tftp server to download

Please fix function comments properly 

> + *
> + *
> + * @return 0 if success, !0 if error
> + */
> +int ulwip_tftp(ulong addr, const char *filename);
> +
> +/*
> +* This function creates the ping for  address provided in parameters.
> +* After this function you need to invoke the polling
> +* loop to process network communication.
> +*
> +*
> +* @ping_addr  start address to download result
> +* Return: 0 for success
> +*         !0 if error
> +*/
> +int ulwip_ping(char *ping_addr);
> diff --git a/net/lwip/Makefile b/net/lwip/Makefile
> index 4c6df94807..8b3e843426 100644
> --- a/net/lwip/Makefile
> +++ b/net/lwip/Makefile
> @@ -67,5 +67,6 @@ obj-$(CONFIG_NET) += port/sys-arch.o
>  
>  obj-$(CONFIG_CMD_DHCP) += apps/dhcp/lwip-dhcp.o
>  obj-$(CONFIG_CMD_DNS) += apps/dns/lwip-dns.o
> +obj-$(CONFIG_CMD_PING) += apps/ping/
>  obj-$(CONFIG_CMD_TFTPBOOT) += apps/tftp/
>  obj-$(CONFIG_CMD_WGET) += apps/http/
> diff --git a/net/lwip/apps/ping/Makefile b/net/lwip/apps/ping/Makefile
> new file mode 100644
> index 0000000000..dc63feb7b5
> --- /dev/null
> +++ b/net/lwip/apps/ping/Makefile
> @@ -0,0 +1,11 @@
> +ccflags-y += -I$(srctree)/net/lwip/port/include
> +ccflags-y += -I$(srctree)/net/lwip/lwip-external/src/include -I$(srctree)/net/lwip
> +ccflags-y += -I$(obj)
> +
> +.PHONY: $(obj)/ping.c
> +$(obj)/ping.o: $(obj)/ping.c
> +$(obj)/ping.c:
> +	cp $(srctree)/net/lwip/lwip-external/contrib/apps/ping/ping.c $(obj)/ping.c
> +
> +obj-$(CONFIG_CMD_PING) += ping.o
> +obj-$(CONFIG_CMD_PING) += lwip_ping.o
> diff --git a/net/lwip/apps/ping/lwip_ping.c b/net/lwip/apps/ping/lwip_ping.c
> new file mode 100644
> index 0000000000..611fcaf591
> --- /dev/null
> +++ b/net/lwip/apps/ping/lwip_ping.c
> @@ -0,0 +1,37 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +/*
> + * (C) Copyright 2023 Linaro Ltd. <maxim.uvarov at linaro.org>
> + */
> +
> +#include "lwip/opt.h"
> +#include "lwip/ip_addr.h"
> +#include "ping.h"
> +#include "lwip_ping.h"
> +
> +static ip_addr_t ip_target;
> +
> +static int ulwip_ping_tmo(void)
> +{
> +
> +	log_err("ping failed; host %s is not alive\n", ipaddr_ntoa(&ip_target));
> +	return 1;
> +}
> +
> +int ulwip_ping(char *ping_addr)
> +{
> +	int err;
> +
> +	err = ipaddr_aton(ping_addr, &ip_target);
> +	if (!err) {
> +		log_err("wrong ping addr string \"%s\" \n", ping_addr);

Invalid ip address is enough

> +		return -1;
> +	}
> +
> +	ulwip_set_tmo(ulwip_ping_tmo);
> +
> +	ping_init(&ip_target);
> +	ping_send_now();
> +
> +	return 0;
> +}
> diff --git a/net/lwip/apps/ping/lwip_ping.h b/net/lwip/apps/ping/lwip_ping.h
> new file mode 100644
> index 0000000000..0374f07d9e
> --- /dev/null
> +++ b/net/lwip/apps/ping/lwip_ping.h
> @@ -0,0 +1,15 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */
> +
> +/*
> + * (C) Copyright 2023 Linaro Ltd. <maxim.uvarov at linaro.org>
> + */
> +
> +#ifndef LWIP_PING_H
> +#define LWIP_PING_H
> +
> +#include <lwip/ip_addr.h>
> +
> +void ping_raw_init(void);
> +void ping_send_now(void);
> +
> +#endif /* LWIP_PING_H */
> diff --git a/net/lwip/apps/ping/ping.h b/net/lwip/apps/ping/ping.h
> new file mode 100644
> index 0000000000..006a18c658
> --- /dev/null
> +++ b/net/lwip/apps/ping/ping.h
> @@ -0,0 +1,19 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +
> +#include <net/ulwip.h>
> +#include "lwip/ip_addr.h"
> +
> +#define LWIP_DEBUG 1 /* ping_time is under ifdef*/
> +#define PING_RESULT(cond) { \
> +	if (cond == 1) { \
> +		printf("host %s a alive\n", ipaddr_ntoa(addr)); \
> +		printf(" %"U32_F" ms\n", (sys_now() - ping_time)); \
> +		ulwip_exit(0); \
> +	} else { \
> +		printf("ping failed; host %s in not alive\n",\
> +		       ipaddr_ntoa(addr)); \
> +		ulwip_exit(-1); \
> +	} \
> +     } while (0);

On the previous patch you are defining a function to do something similar
(httpc_result()).  We need to be consistent on this.  Can we define a
common function for all failures?  Certianly don't define a macro here and
a function elsewhere

> +
> +void ping_init(const ip_addr_t *ping_addr);
> -- 
> 2.30.2
> 

Thanks
/Ilias