diff options
| author | Davide Caratti | 2017-01-09 11:24:21 +0100 |
|---|---|---|
| committer | David S. Miller | 2017-01-09 14:36:57 -0500 |
| commit | c008b33f3ef0915dfb57432dba1fa0ce34fdcc29 (patch) | |
| tree | e28142079de5c76894c14ff9301c3161c941065b /net/sched | |
| parent | ab9d226e3e2a8aeca426701b735194bc35179c2d (diff) | |
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.c | 30 |
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; } |