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From: Petr Machata <petrm@mellanox.com>
To: Kurt Kanzenbach <kurt@linutronix.de>
Cc: Richard Cochran <richardcochran@gmail.com>,
	Andrew Lunn <andrew@lunn.ch>,
	Vivien Didelot <vivien.didelot@gmail.com>,
	Florian Fainelli <f.fainelli@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>, Jiri Pirko <jiri@mellanox.com>,
	Ido Schimmel <idosch@mellanox.com>,
	Heiner Kallweit <hkallweit1@gmail.com>,
	Russell King <linux@armlinux.org.uk>,
	Grygorii Strashko <grygorii.strashko@ti.com>,
	Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>,
	Samuel Zou <zou_wei@huawei.com>,
	netdev@vger.kernel.org, Russell King <rmk+kernel@armlinux.org.uk>
Subject: Re: [PATCH v3 1/9] ptp: Add generic ptp v2 header parsing function
Date: Thu, 30 Jul 2020 12:15:17 +0200
Message-ID: <87lfj1gvgq.fsf@mellanox.com> (raw)
In-Reply-To: <20200730080048.32553-2-kurt@linutronix.de>


Kurt Kanzenbach <kurt@linutronix.de> writes:

> @@ -107,6 +107,37 @@ unsigned int ptp_classify_raw(const struct sk_buff *skb)
>  }
>  EXPORT_SYMBOL_GPL(ptp_classify_raw);
>  
> +struct ptp_header *ptp_parse_header(struct sk_buff *skb, unsigned int type)
> +{
> +	u8 *data = skb_mac_header(skb);
> +	u8 *ptr = data;

One of the "data" and "ptr" variables is superfluous.

> +
> +	if (type & PTP_CLASS_VLAN)
> +		ptr += VLAN_HLEN;
> +
> +	switch (type & PTP_CLASS_PMASK) {
> +	case PTP_CLASS_IPV4:
> +		ptr += IPV4_HLEN(ptr) + UDP_HLEN;
> +		break;
> +	case PTP_CLASS_IPV6:
> +		ptr += IP6_HLEN + UDP_HLEN;
> +		break;
> +	case PTP_CLASS_L2:
> +		break;
> +	default:
> +		return NULL;
> +	}
> +
> +	ptr += ETH_HLEN;
> +
> +	/* Ensure that the entire header is present in this packet. */
> +	if (ptr + sizeof(struct ptp_header) > skb->data + skb->len)
> +		return NULL;

Looks correct.

> +	return (struct ptp_header *)ptr;
> +}
> +EXPORT_SYMBOL_GPL(ptp_parse_header);
> +
>  void __init ptp_classifier_init(void)
>  {
>  	static struct sock_filter ptp_filter[] __initdata = {


  reply index

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-30  8:00 [PATCH v3 0/9] ptp: Add generic helper functions Kurt Kanzenbach
2020-07-30  8:00 ` [PATCH v3 1/9] ptp: Add generic ptp v2 header parsing function Kurt Kanzenbach
2020-07-30 10:15   ` Petr Machata [this message]
2020-07-31 10:06     ` Kurt Kanzenbach
2020-08-04 20:56       ` Grygorii Strashko
2020-08-04 21:07         ` Russell King - ARM Linux admin
2020-08-04 21:34           ` Grygorii Strashko
2020-08-04 21:44             ` Russell King - ARM Linux admin
2020-08-04 22:04               ` Grygorii Strashko
2020-08-04 23:14                 ` Russell King - ARM Linux admin
2020-08-05  9:29                   ` Kurt Kanzenbach
2020-08-05 12:59                     ` Grygorii Strashko
2020-08-05 13:57                       ` Kurt Kanzenbach
2020-08-05 19:15                         ` Grygorii Strashko
2020-08-06  7:56                           ` Kurt Kanzenbach
2020-08-05 15:25         ` Richard Cochran
2020-08-02 15:13   ` Richard Cochran
2020-08-02 20:20   ` Florian Fainelli
2020-07-30  8:00 ` [PATCH v3 2/9] ptp: Add generic ptp message type function Kurt Kanzenbach
2020-08-02 15:18   ` Richard Cochran
2020-08-02 20:20   ` Florian Fainelli
2020-07-30  8:00 ` [PATCH v3 3/9] net: dsa: mv88e6xxx: Use generic helper function Kurt Kanzenbach
2020-08-02 15:18   ` Richard Cochran
2020-08-02 20:21   ` Florian Fainelli
2020-07-30  8:00 ` [PATCH v3 4/9] mlxsw: spectrum_ptp: " Kurt Kanzenbach
2020-07-30 10:20   ` Petr Machata
2020-08-02 20:21   ` Florian Fainelli
2020-07-30  8:00 ` [PATCH v3 5/9] ethernet: ti: am65-cpts: " Kurt Kanzenbach
2020-07-30  9:19   ` Grygorii Strashko
2020-07-30  9:36     ` Kurt Kanzenbach
2020-07-30 10:24       ` Arnd Bergmann
2020-07-31 11:48         ` Kurt Kanzenbach
2020-07-31 12:55           ` Grygorii Strashko
2020-07-31 13:10             ` Kurt Kanzenbach
2020-07-30  8:00 ` [PATCH v3 6/9] ethernet: ti: cpts: " Kurt Kanzenbach
2020-08-02 20:22   ` Florian Fainelli
2020-08-05 18:52     ` Grygorii Strashko
2020-07-30  8:00 ` [PATCH v3 7/9] net: phy: dp83640: " Kurt Kanzenbach
2020-08-02 20:23   ` Florian Fainelli
2020-08-02 22:54   ` Richard Cochran
2020-07-30  8:00 ` [PATCH v3 8/9] ptp: ptp_ines: " Kurt Kanzenbach
2020-08-02 20:23   ` Florian Fainelli
2020-07-30  8:00 ` [PATCH v3 9/9] ptp: Remove unused macro Kurt Kanzenbach
2020-08-02 20:24   ` Florian Fainelli

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