Displaying 20 results from an estimated 34 matches for "skb_network_head".
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skb_network_header
2014 Oct 21
2
IPv6 UFO for VMs
...macvtap.c: gso_type = SKB_GSO_UDP;
drivers/net/tun.c: skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
drivers/net/virtio_net.c: skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
Our implementation of UFO for IPv6 does:
fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen);
fptr->nexthdr = nexthdr;
fptr->reserved = 0;
fptr->identification = skb_shinfo(skb)->ip6_frag_id;
which assumes ip6_frag_id has been set. That's only true if the local
stack constructed the skb; otherwise it appears we get zero.
This seems to be a...
2014 Oct 21
2
IPv6 UFO for VMs
...macvtap.c: gso_type = SKB_GSO_UDP;
drivers/net/tun.c: skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
drivers/net/virtio_net.c: skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
Our implementation of UFO for IPv6 does:
fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen);
fptr->nexthdr = nexthdr;
fptr->reserved = 0;
fptr->identification = skb_shinfo(skb)->ip6_frag_id;
which assumes ip6_frag_id has been set. That's only true if the local
stack constructed the skb; otherwise it appears we get zero.
This seems to be a...
2014 Oct 22
0
IPv6 UFO for VMs
...o_type = SKB_GSO_UDP;
> drivers/net/tun.c: skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
> drivers/net/virtio_net.c: skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
>
> Our implementation of UFO for IPv6 does:
>
> fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen);
> fptr->nexthdr = nexthdr;
> fptr->reserved = 0;
> fptr->identification = skb_shinfo(skb)->ip6_frag_id;
>
> which assumes ip6_frag_id has been set. That's only true if the local
> stack constructed the skb; otherwise it appears we...
2016 Feb 19
0
[Bug 1048] xt_bpf completely broken with kernel 4.3
..._OFF or SKF_NET_OFF offset
to you load offsets in the K constant. It would require to use something like
bpf_asm to write your filters by hand.
F.e. if you look at bpf_internal_load_pointer_neg_helper() helper function in
the kernel, they check for SKF_NET_OFF/SKF_LL_OFF and then use K relative to
skb_network_header(skb) or skb_mac_header(skb), respectively. This should
resolve your use-case.
The problem is that with libpcap, the filters are generated for tcpdump
specifically, and tcpdump doesn't need to care about SKF_NET_OFF/SKF_LL_OFF as
it sees raw packet starting with Ethernet header. So, reusing l...
2014 Oct 11
0
[PATCH net-next RFC 3/3] virtio-net: conditionally enable tx interrupt
...t; +
...
> +
> +static bool virtnet_skb_needs_intr(struct sk_buff *skb)
> +{
> + union {
> + unsigned char *network;
> + struct iphdr *ipv4;
> + struct ipv6hdr *ipv6;
> + } hdr;
> + struct tcphdr *th = tcp_hdr(skb);
> + u16 payload_len;
> +
> + hdr.network = skb_network_header(skb);
> +
> + /* Only IPv4/IPv6 with TCP is supported */
Oh well, yet another packet flow dissector :)
If most packets were caught by your implementation, you could use it
for fast patj and fallback to skb_flow_dissect() for encapsulated
traffic.
struct flow_keys keys;
if (!skb_f...
2014 Oct 11
2
[PATCH net-next RFC 3/3] virtio-net: conditionally enable tx interrupt
...dd_outbuf(sq->vq, sq->sg, num_sg, skb,
+ GFP_ATOMIC);
+}
+
+static bool virtnet_skb_needs_intr(struct sk_buff *skb)
+{
+ union {
+ unsigned char *network;
+ struct iphdr *ipv4;
+ struct ipv6hdr *ipv6;
+ } hdr;
+ struct tcphdr *th = tcp_hdr(skb);
+ u16 payload_len;
+
+ hdr.network = skb_network_header(skb);
+
+ /* Only IPv4/IPv6 with TCP is supported */
+ if ((skb->protocol == htons(ETH_P_IP)) &&
+ hdr.ipv4->protocol == IPPROTO_TCP) {
+ payload_len = ntohs(hdr.ipv4->tot_len) - hdr.ipv4->ihl * 4 -
+ th->doff * 4;
+ } else if ((skb->protocol == htons(ETH_P_...
2014 Oct 11
2
[PATCH net-next RFC 3/3] virtio-net: conditionally enable tx interrupt
...dd_outbuf(sq->vq, sq->sg, num_sg, skb,
+ GFP_ATOMIC);
+}
+
+static bool virtnet_skb_needs_intr(struct sk_buff *skb)
+{
+ union {
+ unsigned char *network;
+ struct iphdr *ipv4;
+ struct ipv6hdr *ipv6;
+ } hdr;
+ struct tcphdr *th = tcp_hdr(skb);
+ u16 payload_len;
+
+ hdr.network = skb_network_header(skb);
+
+ /* Only IPv4/IPv6 with TCP is supported */
+ if ((skb->protocol == htons(ETH_P_IP)) &&
+ hdr.ipv4->protocol == IPPROTO_TCP) {
+ payload_len = ntohs(hdr.ipv4->tot_len) - hdr.ipv4->ihl * 4 -
+ th->doff * 4;
+ } else if ((skb->protocol == htons(ETH_P_...
2015 Jan 26
0
[PATCH 1/3] ipv6: Select fragment id during UFO/GSO segmentation if not set.
...= DIV_ROUND_UP(skb->len, mss);
+ /* Set the IPv6 fragment id if not set yet */
+ if (!skb->ufo_fragid_set)
+ ipv6_proxy_select_ident(skb);
+
segs = NULL;
goto out;
}
@@ -108,7 +112,11 @@ static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb,
fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen);
fptr->nexthdr = nexthdr;
fptr->reserved = 0;
- fptr->identification = skb_shinfo(skb)->ip6_frag_id;
+ if (!skb->ufo_fragid_set)
+ fptr->identification = skb_shinfo(skb)->ip6_frag_id;
+ else
+ ipv6_select_ident(fptr,
+ (struct rt6_inf...
2015 Jan 26
0
[PATCH 1/3] ipv6: Select fragment id during UFO/GSO segmentation if not set.
...= DIV_ROUND_UP(skb->len, mss);
+ /* Set the IPv6 fragment id if not set yet */
+ if (!skb->ufo_fragid_set)
+ ipv6_proxy_select_ident(skb);
+
segs = NULL;
goto out;
}
@@ -108,7 +112,11 @@ static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb,
fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen);
fptr->nexthdr = nexthdr;
fptr->reserved = 0;
- fptr->identification = skb_shinfo(skb)->ip6_frag_id;
+ if (!skb->ufo_fragid_set)
+ fptr->identification = skb_shinfo(skb)->ip6_frag_id;
+ else
+ ipv6_select_ident(fptr,
+ (struct rt6_inf...
2015 Jan 30
0
[PATCH v2 1/3] ipv6: Select fragment id during UFO segmentation if not set.
...UND_UP(skb->len, mss);
+ /* Set the IPv6 fragment id if not set yet */
+ if (!skb_shinfo(skb)->ip6_frag_id)
+ ipv6_proxy_select_ident(skb);
+
segs = NULL;
goto out;
}
@@ -108,7 +112,11 @@ static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb,
fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen);
fptr->nexthdr = nexthdr;
fptr->reserved = 0;
- fptr->identification = skb_shinfo(skb)->ip6_frag_id;
+ if (skb_shinfo(skb)->ip6_frag_id)
+ fptr->identification = skb_shinfo(skb)->ip6_frag_id;
+ else
+ ipv6_select_ident(fptr,
+ (struct...
2015 Jan 30
0
[PATCH v2 1/3] ipv6: Select fragment id during UFO segmentation if not set.
...UND_UP(skb->len, mss);
+ /* Set the IPv6 fragment id if not set yet */
+ if (!skb_shinfo(skb)->ip6_frag_id)
+ ipv6_proxy_select_ident(skb);
+
segs = NULL;
goto out;
}
@@ -108,7 +112,11 @@ static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb,
fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen);
fptr->nexthdr = nexthdr;
fptr->reserved = 0;
- fptr->identification = skb_shinfo(skb)->ip6_frag_id;
+ if (skb_shinfo(skb)->ip6_frag_id)
+ fptr->identification = skb_shinfo(skb)->ip6_frag_id;
+ else
+ ipv6_select_ident(fptr,
+ (struct...
2015 Feb 03
0
[PATCH v3 net 1/3] ipv6: Select fragment id during UFO segmentation if not set.
...UND_UP(skb->len, mss);
+ /* Set the IPv6 fragment id if not set yet */
+ if (!skb_shinfo(skb)->ip6_frag_id)
+ ipv6_proxy_select_ident(skb);
+
segs = NULL;
goto out;
}
@@ -108,7 +112,11 @@ static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb,
fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen);
fptr->nexthdr = nexthdr;
fptr->reserved = 0;
- fptr->identification = skb_shinfo(skb)->ip6_frag_id;
+ if (skb_shinfo(skb)->ip6_frag_id)
+ fptr->identification = skb_shinfo(skb)->ip6_frag_id;
+ else
+ ipv6_select_ident(fptr,
+ (struct...
2015 Feb 03
0
[PATCH v3 net 1/3] ipv6: Select fragment id during UFO segmentation if not set.
...UND_UP(skb->len, mss);
+ /* Set the IPv6 fragment id if not set yet */
+ if (!skb_shinfo(skb)->ip6_frag_id)
+ ipv6_proxy_select_ident(skb);
+
segs = NULL;
goto out;
}
@@ -108,7 +112,11 @@ static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb,
fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen);
fptr->nexthdr = nexthdr;
fptr->reserved = 0;
- fptr->identification = skb_shinfo(skb)->ip6_frag_id;
+ if (skb_shinfo(skb)->ip6_frag_id)
+ fptr->identification = skb_shinfo(skb)->ip6_frag_id;
+ else
+ ipv6_select_ident(fptr,
+ (struct...
2007 Jul 24
0
[PATCH] virtio_net.c gso & feature support
...um_offset;
+ } else {
+ hdr->flags = 0;
+ hdr->csum_offset = hdr->csum_start = 0;
+ }
+
+ if (skb_is_gso(skb)) {
+ printk("xmit: gso size %u len %u (%u/%u/%u)\n",
+ skb_shinfo(skb)->gso_size, skb->len,
+ skb_transport_header(skb) - skb->head,
+ skb_network_header(skb) - skb->head,
+ skb->data - skb->head);
+ hdr->gso_size = skb_shinfo(skb)->gso_size;
+ if (skb_shinfo(skb)->gso_type & SKB_GSO_TCP_ECN)
+ hdr->gso_type = VIRTIO_NET_GSO_TCP_ECN;
+ else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4)
+ hdr->gso_...
2007 Jul 24
0
[PATCH] virtio_net.c gso & feature support
...um_offset;
+ } else {
+ hdr->flags = 0;
+ hdr->csum_offset = hdr->csum_start = 0;
+ }
+
+ if (skb_is_gso(skb)) {
+ printk("xmit: gso size %u len %u (%u/%u/%u)\n",
+ skb_shinfo(skb)->gso_size, skb->len,
+ skb_transport_header(skb) - skb->head,
+ skb_network_header(skb) - skb->head,
+ skb->data - skb->head);
+ hdr->gso_size = skb_shinfo(skb)->gso_size;
+ if (skb_shinfo(skb)->gso_type & SKB_GSO_TCP_ECN)
+ hdr->gso_type = VIRTIO_NET_GSO_TCP_ECN;
+ else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4)
+ hdr->gso_...
2014 Oct 14
0
[PATCH net-next RFC 3/3] virtio-net: conditionally enable tx interrupt
...);
> +}
> +
> +static bool virtnet_skb_needs_intr(struct sk_buff *skb)
> +{
> + union {
> + unsigned char *network;
> + struct iphdr *ipv4;
> + struct ipv6hdr *ipv6;
> + } hdr;
> + struct tcphdr *th = tcp_hdr(skb);
> + u16 payload_len;
> +
> + hdr.network = skb_network_header(skb);
> +
> + /* Only IPv4/IPv6 with TCP is supported */
> + if ((skb->protocol == htons(ETH_P_IP)) &&
> + hdr.ipv4->protocol == IPPROTO_TCP) {
> + payload_len = ntohs(hdr.ipv4->tot_len) - hdr.ipv4->ihl * 4 -
> + th->doff * 4;
> + } else if...
2015 Jan 30
9
[PATCH v2 0/3] Restore UFO support to virtio_net devices
commit 3d0ad09412ffe00c9afa201d01effdb6023d09b4
Author: Ben Hutchings <ben at decadent.org.uk>
Date: Thu Oct 30 18:27:12 2014 +0000
drivers/net: Disable UFO through virtio
Turned off UFO support to virtio-net based devices due to issues
with IPv6 fragment id generation for UFO packets. The issue
was that IPv6 UFO/GSO implementation expects the fragment id
to be supplied in
2015 Jan 30
9
[PATCH v2 0/3] Restore UFO support to virtio_net devices
commit 3d0ad09412ffe00c9afa201d01effdb6023d09b4
Author: Ben Hutchings <ben at decadent.org.uk>
Date: Thu Oct 30 18:27:12 2014 +0000
drivers/net: Disable UFO through virtio
Turned off UFO support to virtio-net based devices due to issues
with IPv6 fragment id generation for UFO packets. The issue
was that IPv6 UFO/GSO implementation expects the fragment id
to be supplied in
2015 Feb 03
4
[PATCH v4 net 0/3] Restore UFO support to virtio_net devices
commit 3d0ad09412ffe00c9afa201d01effdb6023d09b4
Author: Ben Hutchings <ben at decadent.org.uk>
Date: Thu Oct 30 18:27:12 2014 +0000
drivers/net: Disable UFO through virtio
Turned off UFO support to virtio-net based devices due to issues
with IPv6 fragment id generation for UFO packets. The issue
was that IPv6 UFO/GSO implementation expects the fragment id
to be supplied in
2015 Feb 03
4
[PATCH v4 net 0/3] Restore UFO support to virtio_net devices
commit 3d0ad09412ffe00c9afa201d01effdb6023d09b4
Author: Ben Hutchings <ben at decadent.org.uk>
Date: Thu Oct 30 18:27:12 2014 +0000
drivers/net: Disable UFO through virtio
Turned off UFO support to virtio-net based devices due to issues
with IPv6 fragment id generation for UFO packets. The issue
was that IPv6 UFO/GSO implementation expects the fragment id
to be supplied in