mirror of
https://github.com/openvswitch/ovs
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b7ebebcdd7
Update udp-socket-create to create ipv6 socket currectly.
Partially backports commit fd384412e199b ("udp_tunnel: Seperate ipv6
functions into its own file.")
Signed-off-by: Pravin B Shelar <pshelar@ovn.org>
Acked-by: Jesse Gross <jesse@kernel.org>
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
#include <linux/version.h>
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#ifndef HAVE_UDP_SET_CSUM
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#include <net/udp.h>
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/* Function to set UDP checksum for an IPv4 UDP packet. This is intended
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* for the simple case like when setting the checksum for a UDP tunnel.
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*/
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void rpl_udp_set_csum(bool nocheck, struct sk_buff *skb,
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__be32 saddr, __be32 daddr, int len)
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{
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struct udphdr *uh = udp_hdr(skb);
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if (nocheck)
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uh->check = 0;
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else if (skb_is_gso(skb))
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uh->check = ~udp_v4_check(len, saddr, daddr, 0);
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else if (skb_dst(skb) && skb_dst(skb)->dev &&
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(skb_dst(skb)->dev->features & NETIF_F_V4_CSUM)) {
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BUG_ON(skb->ip_summed == CHECKSUM_PARTIAL);
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skb->ip_summed = CHECKSUM_PARTIAL;
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skb->csum_start = skb_transport_header(skb) - skb->head;
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skb->csum_offset = offsetof(struct udphdr, check);
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uh->check = ~udp_v4_check(len, saddr, daddr, 0);
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} else {
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__wsum csum;
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BUG_ON(skb->ip_summed == CHECKSUM_PARTIAL);
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uh->check = 0;
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csum = skb_checksum(skb, 0, len, 0);
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uh->check = udp_v4_check(len, saddr, daddr, csum);
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if (uh->check == 0)
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uh->check = CSUM_MANGLED_0;
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skb->ip_summed = CHECKSUM_UNNECESSARY;
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}
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}
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EXPORT_SYMBOL_GPL(rpl_udp_set_csum);
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#endif /* Linux version < 3.16 */
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#ifdef OVS_CHECK_UDP_TUNNEL_ZERO_CSUM
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void rpl_udp6_csum_zero_error(struct sk_buff *skb)
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{
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/* RFC 2460 section 8.1 says that we SHOULD log
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* this error. Well, it is reasonable.
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*/
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net_dbg_ratelimited("IPv6: udp checksum is 0 for [%pI6c]:%u->[%pI6c]:%u\n",
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&ipv6_hdr(skb)->saddr, ntohs(udp_hdr(skb)->source),
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&ipv6_hdr(skb)->daddr, ntohs(udp_hdr(skb)->dest));
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}
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#endif
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