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C++ skb_checksum_help函数代码示例

本文整理汇总了C++中skb_checksum_help函数的典型用法代码示例。如果您正苦于以下问题：C++ skb_checksum_help函数的具体用法？C++ skb_checksum_help怎么用？C++ skb_checksum_help使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。


在下文中一共展示了skb_checksum_help函数的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: xfrm6_output_one

static int xfrm6_output_one(struct sk_buff *skb)
{
	struct dst_entry *dst = skb->dst;
	struct xfrm_state *x = dst->xfrm;
	int err;

	if (skb->ip_summed == CHECKSUM_PARTIAL) {
		err = skb_checksum_help(skb);
		if (err)
			goto error_nolock;
	}

	if (x->props.mode == XFRM_MODE_TUNNEL) {
		err = xfrm6_tunnel_check_size(skb);
		if (err)
			goto error_nolock;
	}

	do {
		spin_lock_bh(&x->lock);
		err = xfrm_state_check(x, skb);
		if (err)
			goto error;

		err = x->mode->output(x, skb);
		if (err)
			goto error;

		err = x->type->output(x, skb);
		if (err)
			goto error;

		x->curlft.bytes += skb->len;
		x->curlft.packets++;
		if (x->props.mode == XFRM_MODE_ROUTEOPTIMIZATION)
			x->lastused = (u64)xtime.tv_sec;

		spin_unlock_bh(&x->lock);

		skb->nh.raw = skb->data;

		if (!(skb->dst = dst_pop(dst))) {
			err = -EHOSTUNREACH;
			goto error_nolock;
		}
		dst = skb->dst;
		x = dst->xfrm;
	} while (x && (x->props.mode != XFRM_MODE_TUNNEL));

	IP6CB(skb)->flags |= IP6SKB_XFRM_TRANSFORMED;
	err = 0;

out_exit:
	return err;
error:
	spin_unlock_bh(&x->lock);
error_nolock:
	kfree_skb(skb);
	goto out_exit;
}
开发者ID:StephenMacras，项目名称:dsl-n55u-bender，代码行数:60，代码来源:xfrm6_output.c

示例2: skb_reset_inner_headers

struct sk_buff *gre_handle_offloads(struct sk_buff *skb, bool gre_csum)
{
	int err;

	if (likely(!skb->encapsulation)) {
		skb_reset_inner_headers(skb);
		skb->encapsulation = 1;
	}

	if (skb_is_gso(skb)) {
		err = skb_unclone(skb, GFP_ATOMIC);
		if (unlikely(err))
			goto error;
		skb_shinfo(skb)->gso_type |= SKB_GSO_GRE;
		return skb;
	} else if (skb->ip_summed == CHECKSUM_PARTIAL && gre_csum) {
		err = skb_checksum_help(skb);
		if (unlikely(err))
			goto error;
	} else if (skb->ip_summed != CHECKSUM_PARTIAL)
		skb->ip_summed = CHECKSUM_NONE;

	return skb;
error:
	kfree_skb(skb);
	return ERR_PTR(err);
}
开发者ID:AeroGirl，项目名称:VAR-SOM-AM33-SDK7-Kernel，代码行数:27，代码来源:gre_demux.c

示例3: rpl_ip6_local_out

int rpl_ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb)
{

	if (!OVS_GSO_CB(skb)->fix_segment)
		return output_ipv6(skb);

	if (skb_is_gso(skb)) {
		int ret;

		skb = tnl_skb_gso_segment(skb, 0, false, AF_INET6);
		if (!skb || IS_ERR(skb))
			return NET_XMIT_DROP;

		do {
			struct sk_buff *next_skb = skb->next;

			skb->next = NULL;
			ret = output_ipv6(skb);
			skb = next_skb;
		} while (skb);
		return ret;
	}  else if (skb->ip_summed == CHECKSUM_PARTIAL) {
		int err;

		err = skb_checksum_help(skb);
		if (unlikely(err))
			return NET_XMIT_DROP;
	}

	return output_ipv6(skb);
}
开发者ID:ALutzG，项目名称:ovs，代码行数:31，代码来源:gso.c

示例4: xfrm_output

int xfrm_output(struct sock *sk, struct sk_buff *skb)
{
	struct net *net = dev_net(skb_dst(skb)->dev);
	struct xfrm_state *x = skb_dst(skb)->xfrm;
	int err;

	secpath_reset(skb);

	if (xfrm_dev_offload_ok(skb, x)) {
		struct sec_path *sp;

		sp = secpath_dup(skb->sp);
		if (!sp) {
			XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTERROR);
			kfree_skb(skb);
			return -ENOMEM;
		}
		if (skb->sp)
			secpath_put(skb->sp);
		skb->sp = sp;
		skb->encapsulation = 1;

		sp->olen++;
		sp->xvec[skb->sp->len++] = x;
		xfrm_state_hold(x);

		if (skb_is_gso(skb)) {
			skb_shinfo(skb)->gso_type |= SKB_GSO_ESP;

			return xfrm_output2(net, sk, skb);
		}

		if (x->xso.dev && x->xso.dev->features & NETIF_F_HW_ESP_TX_CSUM)
			goto out;
	}

	if (skb_is_gso(skb))
		return xfrm_output_gso(net, sk, skb);

	if (skb->ip_summed == CHECKSUM_PARTIAL) {
		err = skb_checksum_help(skb);
		if (err) {
			XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTERROR);
			kfree_skb(skb);
			return err;
		}
	}

out:
	return xfrm_output2(net, sk, skb);
}
开发者ID:krzk，项目名称:linux，代码行数:51，代码来源:xfrm_output.c

示例5: ovs_iptunnel_handle_offloads

int ovs_iptunnel_handle_offloads(struct sk_buff *skb,
				 bool csum_help, int gso_type_mask,
				 void (*fix_segment)(struct sk_buff *))
{
	int err;

	if (likely(!skb_is_encapsulated(skb))) {
		skb_reset_inner_headers(skb);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)
		skb->encapsulation = 1;
#endif
	} else if (skb_is_gso(skb)) {
		err = -ENOSYS;
		goto error;
	}

#if LINUX_VERSION_CODE < KERNEL_VERSION(3,18,0)
	if (gso_type_mask)
		fix_segment = NULL;

	OVS_GSO_CB(skb)->fix_segment = fix_segment;
#endif
	if (skb_is_gso(skb)) {
		err = skb_unclone(skb, GFP_ATOMIC);
		if (unlikely(err))
			goto error;
		skb_shinfo(skb)->gso_type |= gso_type_mask;
		return 0;
	}

#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)
	/* If packet is not gso and we are resolving any partial checksum,
	 * clear encapsulation flag. This allows setting CHECKSUM_PARTIAL
	 * on the outer header without confusing devices that implement
	 * NETIF_F_IP_CSUM with encapsulation.
	 */
	if (csum_help)
		skb->encapsulation = 0;
#endif

	if (skb->ip_summed == CHECKSUM_PARTIAL && csum_help) {
		err = skb_checksum_help(skb);
		if (unlikely(err))
			goto error;
	} else if (skb->ip_summed != CHECKSUM_PARTIAL)
		skb->ip_summed = CHECKSUM_NONE;

	return 0;
error:
	return err;
}
开发者ID:liusongpeng，项目名称:ovs，代码行数:51，代码来源:ip_tunnels_core.c

示例6: rtw_set_tx_chksum_offload

void rtw_set_tx_chksum_offload(_pkt *pkt, struct pkt_attrib *pattrib)
{

#ifdef CONFIG_TCP_CSUM_OFFLOAD_TX
	struct sk_buff *skb = (struct sk_buff *)pkt;
	pattrib->hw_tcp_csum = 0;
	
	if (skb->ip_summed == CHECKSUM_PARTIAL) {
		if (skb_shinfo(skb)->nr_frags == 0)
		{	
                        const struct iphdr *ip = ip_hdr(skb);
                        if (ip->protocol == IPPROTO_TCP) {
                                // TCP checksum offload by HW
                                DBG_871X("CHECKSUM_PARTIAL TCP\n");
                                pattrib->hw_tcp_csum = 1;
                                //skb_checksum_help(skb);
                        } else if (ip->protocol == IPPROTO_UDP) {
                                //DBG_871X("CHECKSUM_PARTIAL UDP\n");
#if 1                       
                                skb_checksum_help(skb);
#else
                                // Set UDP checksum = 0 to skip checksum check
                                struct udphdr *udp = skb_transport_header(skb);
                                udp->check = 0;
#endif
                        } else {
				DBG_871X("%s-%d TCP CSUM offload Error!!\n", __FUNCTION__, __LINE__);
                                WARN_ON(1);     /* we need a WARN() */
			    }
		}
		else { // IP fragmentation case
			DBG_871X("%s-%d nr_frags != 0, using skb_checksum_help(skb);!!\n", __FUNCTION__, __LINE__);
                	skb_checksum_help(skb);
		}		
	}
#endif	
	
}
开发者ID:AOSC-Dev，项目名称:aosc-os-armel-sunxi-boot，代码行数:38，代码来源:xmit_linux.c

示例7: void

struct sk_buff *ovs_iptunnel_handle_offloads(struct sk_buff *skb,
                                             bool csum_help,
					     void (*fix_segment)(struct sk_buff *))
{
	int err;

	/* XXX: synchronize inner header reset for compat and non compat code
	 * so that we can do it here.
	 */
	/*
	 skb_reset_inner_headers(skb);
	 */

	/* OVS compat code does not maintain encapsulation bit.
	 * skb->encapsulation = 1; */

	if (skb_is_gso(skb)) {
		if (skb_is_encapsulated(skb)) {
			err = -ENOSYS;
			goto error;
		}

		OVS_GSO_CB(skb)->fix_segment = fix_segment;
		return skb;
	}

	/* If packet is not gso and we are resolving any partial checksum,
	 * clear encapsulation flag. This allows setting CHECKSUM_PARTIAL
	 * on the outer header without confusing devices that implement
	 * NETIF_F_IP_CSUM with encapsulation.
	 */
	/*
	if (csum_help)
		skb->encapsulation = 0;
	*/

	if (skb->ip_summed == CHECKSUM_PARTIAL && csum_help) {
		err = skb_checksum_help(skb);
		if (unlikely(err))
			goto error;
	} else if (skb->ip_summed != CHECKSUM_PARTIAL)
		skb->ip_summed = CHECKSUM_NONE;

	return skb;
error:
	kfree_skb(skb);
	return ERR_PTR(err);
}
开发者ID:Altiscale，项目名称:ovs，代码行数:48，代码来源:gso.c

示例8: rpl_iptunnel_handle_offloads

int rpl_iptunnel_handle_offloads(struct sk_buff *skb,
				 bool csum_help,
				 int gso_type_mask)
#endif
{
	int err;

	if (likely(!skb->encapsulation)) {
		skb_reset_inner_headers(skb);
		skb->encapsulation = 1;
	}

	if (skb_is_gso(skb)) {
		err = skb_unclone(skb, GFP_ATOMIC);
		if (unlikely(err))
			goto error;
		skb_shinfo(skb)->gso_type |= gso_type_mask;
		goto out;
	}

	/* If packet is not gso and we are resolving any partial checksum,
 	 * clear encapsulation flag. This allows setting CHECKSUM_PARTIAL
 	 * on the outer header without confusing devices that implement
 	 * NETIF_F_IP_CSUM with encapsulation.
 	 */
	if (csum_help)
		skb->encapsulation = 0;

	if (skb->ip_summed == CHECKSUM_PARTIAL && csum_help) {
		err = skb_checksum_help(skb);
		if (unlikely(err))
			goto error;
	} else if (skb->ip_summed != CHECKSUM_PARTIAL)
		skb->ip_summed = CHECKSUM_NONE;

#if LINUX_VERSION_CODE < KERNEL_VERSION(4,7,0)
out:
	return skb;
error:
	kfree_skb(skb);
	return ERR_PTR(err);
#else
out:
error:
	return 0;
#endif
}
开发者ID:blp，项目名称:ovs-reviews，代码行数:47，代码来源:ip_tunnels_core.c

示例9: rpl_ip_local_out

int rpl_ip_local_out(struct sk_buff *skb)
{
	int ret = NETDEV_TX_OK;
	int id = -1;

	if (skb_is_gso(skb)) {
		struct iphdr *iph;

		iph = ip_hdr(skb);
		id = ntohs(iph->id);
		skb = tnl_skb_gso_segment(skb, 0, false);
		if (!skb || IS_ERR(skb))
			return 0;
	}  else if (skb->ip_summed == CHECKSUM_PARTIAL) {
		int err;

		err = skb_checksum_help(skb);
		if (unlikely(err))
			return 0;
	}

	while (skb) {
		struct sk_buff *next_skb = skb->next;
		struct iphdr *iph;
		int err;

		skb->next = NULL;

		iph = ip_hdr(skb);
		if (id >= 0)
			iph->id = htons(id++);

		memset(IPCB(skb), 0, sizeof(*IPCB(skb)));

#undef ip_local_out
		err = ip_local_out(skb);
		if (unlikely(net_xmit_eval(err)))
			ret = err;

		skb = next_skb;
	}
	return ret;
}
开发者ID:iovisor-obsolete，项目名称:old_bpf_historical，代码行数:43，代码来源:gso.c

示例10: xfrm_output

int xfrm_output(struct sk_buff *skb)
{
	struct net *net = dev_net(skb_dst(skb)->dev);
	int err;

	if (skb_is_gso(skb))
		return xfrm_output_gso(skb);

	if (skb->ip_summed == CHECKSUM_PARTIAL) {
		err = skb_checksum_help(skb);
		if (err) {
			XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTERROR);
			kfree_skb(skb);
			return err;
		}
	}

	return xfrm_output2(skb);
}
开发者ID:KaZoom，项目名称:buildroot-linux-kernel-m3，代码行数:19，代码来源:xfrm_output.c

示例11: kernel_dev_xmit

static netdev_tx_t
kernel_dev_xmit(struct sk_buff *skb,
		struct net_device *dev)
{
	int err;

	netif_stop_queue(dev);
	if (skb->ip_summed == CHECKSUM_PARTIAL) {
		err = skb_checksum_help(skb);
		if (unlikely(err)) {
			pr_err("checksum error (%d)\n", err);
			return 0;
		}
	}

	lib_dev_xmit((struct SimDevice *)dev, skb->data, skb->len);
	dev_kfree_skb(skb);
	netif_wake_queue(dev);
	return 0;
}
开发者ID:RWTH-OS，项目名称:net-next-nuse，代码行数:20，代码来源:lib-device.c

示例12: skb_reset_inner_headers

struct sk_buff *gre_handle_offloads(struct sk_buff *skb, bool gre_csum)
{
	int err;

	skb_reset_inner_headers(skb);

	if (skb_is_gso(skb)) {
		if (gre_csum)
			OVS_GSO_CB(skb)->fix_segment = gre_csum_fix;
	} else {
		if (skb->ip_summed == CHECKSUM_PARTIAL && gre_csum) {
			err = skb_checksum_help(skb);
			if (err)
				goto error;

		} else if (skb->ip_summed != CHECKSUM_PARTIAL)
			skb->ip_summed = CHECKSUM_NONE;
	}
	return skb;
error:
	kfree_skb(skb);
	return ERR_PTR(err);
}
开发者ID:Grace-Liu，项目名称:dpdk-ovs，代码行数:23，代码来源:gre.c

示例13: rpl_ip_local_out

int rpl_ip_local_out(struct net *net, struct sock *sk, struct sk_buff *skb)
{
	if (!OVS_GSO_CB(skb)->fix_segment)
		return output_ip(skb);

	/* This bit set can confuse some drivers on old kernel. */
	skb->encapsulation = 0;

	if (skb_is_gso(skb)) {
		int ret;
		int id;

		skb = tnl_skb_gso_segment(skb, 0, false, AF_INET);
		if (!skb || IS_ERR(skb))
			return NET_XMIT_DROP;

		id = ntohs(ip_hdr(skb)->id);
		do {
			struct sk_buff *next_skb = skb->next;

			skb->next = NULL;
			ip_hdr(skb)->id = htons(id++);

			ret = output_ip(skb);
			skb = next_skb;
		} while (skb);
		return ret;
	}  else if (skb->ip_summed == CHECKSUM_PARTIAL) {
		int err;

		err = skb_checksum_help(skb);
		if (unlikely(err))
			return NET_XMIT_DROP;
	}

	return output_ip(skb);
}
开发者ID:Grim-lock，项目名称:ovs，代码行数:37，代码来源:gso.c

示例14: skb_unclone

static struct sk_buff *handle_offloads(struct ip_tunnel *tunnel, struct sk_buff *skb)
{
	int err;

	if (skb_is_gso(skb)) {
		err = skb_unclone(skb, GFP_ATOMIC);
		if (unlikely(err))
			goto error;
		skb_shinfo(skb)->gso_type |= SKB_GSO_GRE;
		return skb;
	} else if (skb->ip_summed == CHECKSUM_PARTIAL &&
		   tunnel->parms.o_flags&TUNNEL_CSUM) {
		err = skb_checksum_help(skb);
		if (unlikely(err))
			goto error;
	} else if (skb->ip_summed != CHECKSUM_PARTIAL)
		skb->ip_summed = CHECKSUM_NONE;

	return skb;

error:
	kfree_skb(skb);
	return ERR_PTR(err);
}
开发者ID:AICP，项目名称:kernel_moto_shamu，代码行数:24，代码来源:ip_gre.c

示例15: netvsc_start_xmit


//.........这里部分代码省略.........
		vlan->pri = (skb->vlan_tci & VLAN_PRIO_MASK) >>
				VLAN_PRIO_SHIFT;
	}

	net_trans_info = get_net_transport_info(skb, &hdr_offset);

	/*
	 * Setup the sendside checksum offload only if this is not a
	 * GSO packet.
	 */
	if ((net_trans_info & (INFO_TCP | INFO_UDP)) && skb_is_gso(skb)) {
		struct ndis_tcp_lso_info *lso_info;

		rndis_msg_size += NDIS_LSO_PPI_SIZE;
		ppi = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE,
				    TCP_LARGESEND_PKTINFO);

		lso_info = (struct ndis_tcp_lso_info *)((void *)ppi +
							ppi->ppi_offset);

		lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE;
		if (net_trans_info & (INFO_IPV4 << 16)) {
			lso_info->lso_v2_transmit.ip_version =
				NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4;
			ip_hdr(skb)->tot_len = 0;
			ip_hdr(skb)->check = 0;
			tcp_hdr(skb)->check =
				~csum_tcpudp_magic(ip_hdr(skb)->saddr,
						   ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
		} else {
			lso_info->lso_v2_transmit.ip_version =
				NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6;
			ipv6_hdr(skb)->payload_len = 0;
			tcp_hdr(skb)->check =
				~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
						 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
		}
		lso_info->lso_v2_transmit.tcp_header_offset = hdr_offset;
		lso_info->lso_v2_transmit.mss = skb_shinfo(skb)->gso_size;
	} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
		if (net_trans_info & INFO_TCP) {
			rndis_msg_size += NDIS_CSUM_PPI_SIZE;
			ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE,
					    TCPIP_CHKSUM_PKTINFO);

			csum_info = (struct ndis_tcp_ip_checksum_info *)((void *)ppi +
									 ppi->ppi_offset);

			if (net_trans_info & (INFO_IPV4 << 16))
				csum_info->transmit.is_ipv4 = 1;
			else
				csum_info->transmit.is_ipv6 = 1;

			csum_info->transmit.tcp_checksum = 1;
			csum_info->transmit.tcp_header_offset = hdr_offset;
		} else {
			/* UDP checksum (and other) offload is not supported. */
			if (skb_checksum_help(skb))
				goto drop;
		}
	}

	/* Start filling in the page buffers with the rndis hdr */
	rndis_msg->msg_len += rndis_msg_size;
	packet->total_data_buflen = rndis_msg->msg_len;
	packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size,
					       skb, packet, &pb);

	/* timestamp packet in software */
	skb_tx_timestamp(skb);
	ret = netvsc_send(net_device_ctx->device_ctx, packet,
			  rndis_msg, &pb, skb);
	if (likely(ret == 0)) {
		struct netvsc_stats *tx_stats = this_cpu_ptr(net_device_ctx->tx_stats);

		u64_stats_update_begin(&tx_stats->syncp);
		tx_stats->packets++;
		tx_stats->bytes += skb_length;
		u64_stats_update_end(&tx_stats->syncp);
		return NETDEV_TX_OK;
	}

	if (ret == -EAGAIN) {
		++net_device_ctx->eth_stats.tx_busy;
		return NETDEV_TX_BUSY;
	}

	if (ret == -ENOSPC)
		++net_device_ctx->eth_stats.tx_no_space;

drop:
	dev_kfree_skb_any(skb);
	net->stats.tx_dropped++;

	return NETDEV_TX_OK;

no_memory:
	++net_device_ctx->eth_stats.tx_no_memory;
	goto drop;
}
开发者ID:mansr，项目名称:linux-tangox，代码行数:101，代码来源:netvsc_drv.c


注：本文中的skb_checksum_help函数示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。