[PATCH 06/10] net: sntp: use net_eth_to_udp() for packet parsing

[Ahmad Fatoum]

On 4/2/26 8:36 AM, Sascha Hauer wrote:
> Replace the separate net_eth_to_udp_payload() and net_eth_to_udplen()
> calls with the new consolidated net_eth_to_udp() helper.
> 
> The direct net_eth_to_iphdr() call is kept because SNTP needs to check
> the source IP address before processing the UDP payload.
> 
> Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
> Co-Authored-By: Claude Opus 4.6 <noreply at anthropic.com>

Reviewed-by: Ahmad Fatoum <a.fatoum at pengutronix.de>

> ---
>  net/sntp.c | 14 +++++++++-----
>  1 file changed, 9 insertions(+), 5 deletions(-)
> 
> diff --git a/net/sntp.c b/net/sntp.c
> index be361f625d..c7441bc312 100644
> --- a/net/sntp.c
> +++ b/net/sntp.c
> @@ -75,19 +75,23 @@ static int sntp_send(void)
>  
>  static void sntp_handler(void *ctx, char *pkt, unsigned len)
>  {
> -	IPaddr_t ip_addr;
>  	struct iphdr *ip = net_eth_to_iphdr(pkt);
> -	struct ntp_packet *ntp =
> -	    (struct ntp_packet *)net_eth_to_udp_payload(pkt);
> +	struct net_udp_pkt udp;
> +	struct ntp_packet *ntp;
> +	IPaddr_t ip_addr;
>  
>  	ip_addr = net_read_ip((void *)&ip->saddr);
>  	if (ip_addr != net_sntp_ip)
>  		return;
>  
> -	len = net_eth_to_udplen(pkt);
> -	if (len < sizeof(struct ntp_packet))
> +	if (net_eth_to_udp(pkt, len, &udp))
>  		return;
>  
> +	if (udp.len < sizeof(struct ntp_packet))
> +		return;
> +
> +	ntp = udp.payload;
> +
>  	pr_debug("received SNTP response\n");
>  
>  	if (ntp->version != VERSION)
> 

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