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authorDavide Caratti <dcaratti@redhat.com>2017-01-09 11:24:21 +0100
committerDavid S. Miller <davem@davemloft.net>2017-01-09 14:36:57 -0500
commitc008b33f3ef0915dfb57432dba1fa0ce34fdcc29 (patch)
treee28142079de5c76894c14ff9301c3161c941065b /net/sched
parentab9d226e3e2a8aeca426701b735194bc35179c2d (diff)
downloadlinux-c008b33f3ef0915dfb57432dba1fa0ce34fdcc29.tar.bz2
net/sched: act_csum: compute crc32c on SCTP packets
modify act_csum to compute crc32c on IPv4/IPv6 packets having SCTP in their payload, and extend UAPI definitions accordingly. Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched')
-rw-r--r--net/sched/act_csum.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/net/sched/act_csum.c b/net/sched/act_csum.c
index a0edd80a44db..e978ccd4402c 100644
--- a/net/sched/act_csum.c
+++ b/net/sched/act_csum.c
@@ -30,6 +30,7 @@
#include <net/tcp.h>
#include <net/udp.h>
#include <net/ip6_checksum.h>
+#include <net/sctp/checksum.h>
#include <net/act_api.h>
@@ -322,6 +323,25 @@ ignore_obscure_skb:
return 1;
}
+static int tcf_csum_sctp(struct sk_buff *skb, unsigned int ihl,
+ unsigned int ipl)
+{
+ struct sctphdr *sctph;
+
+ if (skb_is_gso(skb) && skb_shinfo(skb)->gso_type & SKB_GSO_SCTP)
+ return 1;
+
+ sctph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*sctph));
+ if (!sctph)
+ return 0;
+
+ sctph->checksum = sctp_compute_cksum(skb,
+ skb_network_offset(skb) + ihl);
+ skb->ip_summed = CHECKSUM_NONE;
+
+ return 1;
+}
+
static int tcf_csum_ipv4(struct sk_buff *skb, u32 update_flags)
{
const struct iphdr *iph;
@@ -365,6 +385,11 @@ static int tcf_csum_ipv4(struct sk_buff *skb, u32 update_flags)
ntohs(iph->tot_len), 1))
goto fail;
break;
+ case IPPROTO_SCTP:
+ if ((update_flags & TCA_CSUM_UPDATE_FLAG_SCTP) &&
+ !tcf_csum_sctp(skb, iph->ihl * 4, ntohs(iph->tot_len)))
+ goto fail;
+ break;
}
if (update_flags & TCA_CSUM_UPDATE_FLAG_IPV4HDR) {
@@ -481,6 +506,11 @@ static int tcf_csum_ipv6(struct sk_buff *skb, u32 update_flags)
pl + sizeof(*ip6h), 1))
goto fail;
goto done;
+ case IPPROTO_SCTP:
+ if ((update_flags & TCA_CSUM_UPDATE_FLAG_SCTP) &&
+ !tcf_csum_sctp(skb, hl, pl + sizeof(*ip6h)))
+ goto fail;
+ goto done;
default:
goto ignore_skb;
}