[PATCHv8 06/15] net/lwip: implement wget cmd

[Ilias Apalodimas]

>  4 files changed, 128 insertions(+)
>  create mode 100644 net/lwip/apps/http/Makefile
>  create mode 100644 net/lwip/apps/http/lwip-wget.c
>
> diff --git a/include/net/lwip.h b/include/net/lwip.h
> index c9e2982a78..85f08343fd 100644
> --- a/include/net/lwip.h
> +++ b/include/net/lwip.h
> @@ -28,6 +28,7 @@ int ulwip_dns(char *name, char *varname);
>   * Returns: 0 if success
>   *         Other value < 0, if error
>  */
> +int ulwip_dhcp(void);

This seems unrelated to wget changes

[...]

> +// 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 <vsprintf.h>
> +
> +#include "http_client.h"
> +#include <net/ulwip.h>
> +
> +static ulong daddr;
> +static httpc_connection_t settings;
> +
> +#define SERVER_NAME_SIZE 200
> +#define HTTP_PORT_DEFAULT 80
> +
> +static err_t httpc_recv(void *arg, struct altcp_pcb *pcb, struct pbuf *pbuf,
> +			err_t unused_err)
> +{
> +	struct pbuf *buf;
> +
> +	if (!pbuf)
> +		return ERR_BUF;
> +
> +	for (buf = pbuf; buf != NULL; buf = buf->next) {
> +		memcpy((void *)daddr, buf->payload, buf->len);
> +		log_debug("downloaded chunk size %d, to addr 0x%lx\n",
> +			  buf->len, daddr);
> +		daddr += buf->len;
> +	}
> +
> +	altcp_recved(pcb, pbuf->tot_len);
> +	pbuf_free(pbuf);
> +	return ERR_OK;
> +}
> +
> +static void httpc_result(void *arg, httpc_result_t httpc_result, u32_t rx_content_len,
> +			 u32_t srv_res, err_t err)
> +{
> +	if (httpc_result == HTTPC_RESULT_OK) {
> +		log_info("\n%d bytes successfully downloaded.\n", rx_content_len);
> +		env_set_hex("filesize", rx_content_len);
> +		ulwip_exit(0);
> +	} else {
> +		log_err("\nhttp eroror: %d\n", httpc_result);
> +		ulwip_exit(-1);
> +	}
> +}
> +
> +/* http://hostname:port/url */

The format doesn't expect a port (for now we can change that once we add
https)

> +static int parse_url(char *url, char *host, u16 *port)
> +{
> +	char *p, *pp;
> +
> +	p = strstr(url, "http://");
> +	if (!p)
> +		return -1;
> +
> +	p += strlen("http://");
> +
> +	/* parse hostname */
> +	pp = strchr(p, '/');
> +	if (!pp) {
> +		return -2;

-1, -2 -3 etc should be mapped to proper ERRNOs

> +	}
> +
> +	if (pp - p >= SERVER_NAME_SIZE)

Can you change this to p + SERVER_NAME_SIZE >= pp ?

> +		return -3;
> +
> +	memcpy(host, p, pp - p);
> +	host[pp - p + 1] = '\0';
> +	*port = HTTP_PORT_DEFAULT;
> +
> +	return 0;
> +}
> +
> +int ulwip_wget(ulong addr, char *url)
> +{
> +	err_t err;
> +	u16 port;
> +	char server_name[SERVER_NAME_SIZE];
> +	httpc_state_t *connection;
> +
> +	daddr = addr;
> +
> +	err = parse_url(url, server_name, &port);
> +	if (err)
> +		return -ENOENT;
> +
> +	log_info("downloading %s to addr 0x%lx\n", url, addr);
> +	memset(&settings, 0, sizeof(settings));
> +	settings.result_fn = httpc_result;
> +	err = httpc_get_file_dns(server_name, port, url, &settings,
> +				 httpc_recv, NULL,  &connection);
> +	if (err != ERR_OK)
> +		return -EPERM;
> +
> +	if (env_set_hex("fileaddr", addr))
> +		return -EACCES;
> +
> +	return 0;
> +}
> --
> 2.30.2
>

Thanks
/Ilias