C++ (Cpp) __tcp_v4_send_check示例

示例#1

文件： tcp_offload.c 项目： Lanyaaki/ipaugenblick

static int tcp_v4_gso_send_check(struct sk_buff *skb)
{
	const struct iphdr *iph;
	struct tcphdr *th;

	if (!pskb_may_pull(skb, sizeof(*th)))
		return -EINVAL;

	iph = ip_hdr(skb);
	th = tcp_hdr(skb);

	th->check = 0;
	skb->ip_summed = CHECKSUM_PARTIAL;
	__tcp_v4_send_check(skb, iph->saddr, iph->daddr);
	return 0;
}

示例#2

文件： tcp_offload.c 项目： mhei/linux

static struct sk_buff *tcp4_gso_segment(struct sk_buff *skb,
                                        netdev_features_t features)
{
    if (!pskb_may_pull(skb, sizeof(struct tcphdr)))
        return ERR_PTR(-EINVAL);

    if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL)) {
        const struct iphdr *iph = ip_hdr(skb);
        struct tcphdr *th = tcp_hdr(skb);

        /* Set up checksum pseudo header, usually expect stack to
         * have done this already.
         */

        th->check = 0;
        skb->ip_summed = CHECKSUM_PARTIAL;
        __tcp_v4_send_check(skb, iph->saddr, iph->daddr);
    }

    return tcp_gso_segment(skb, features);
}