mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-20 00:07:40 +07:00
f3750817a9
The UDP checksum calculation for VXLAN tunnels is currently using the
socket addresses instead of the actual packet source and destination
addresses. As a result the checksum calculated is incorrect in some
cases.
Also uh->check was being set twice, first it was set to 0, and then it is
set again in udp6_set_csum. This change removes the redundant assignment
to 0.
Fixes: acbf74a7 ("vxlan: Refactor vxlan driver to make use of the common UDP tunnel functions.")
Cc: Andy Zhou <azhou@nicira.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
#include <linux/module.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/socket.h>
|
|
#include <linux/udp.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/in6.h>
|
|
#include <net/udp.h>
|
|
#include <net/udp_tunnel.h>
|
|
#include <net/net_namespace.h>
|
|
#include <net/netns/generic.h>
|
|
#include <net/ip6_tunnel.h>
|
|
#include <net/ip6_checksum.h>
|
|
|
|
int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
|
|
struct socket **sockp)
|
|
{
|
|
struct sockaddr_in6 udp6_addr;
|
|
int err;
|
|
struct socket *sock = NULL;
|
|
|
|
err = sock_create_kern(AF_INET6, SOCK_DGRAM, 0, &sock);
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
sk_change_net(sock->sk, net);
|
|
|
|
udp6_addr.sin6_family = AF_INET6;
|
|
memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6,
|
|
sizeof(udp6_addr.sin6_addr));
|
|
udp6_addr.sin6_port = cfg->local_udp_port;
|
|
err = kernel_bind(sock, (struct sockaddr *)&udp6_addr,
|
|
sizeof(udp6_addr));
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
if (cfg->peer_udp_port) {
|
|
udp6_addr.sin6_family = AF_INET6;
|
|
memcpy(&udp6_addr.sin6_addr, &cfg->peer_ip6,
|
|
sizeof(udp6_addr.sin6_addr));
|
|
udp6_addr.sin6_port = cfg->peer_udp_port;
|
|
err = kernel_connect(sock,
|
|
(struct sockaddr *)&udp6_addr,
|
|
sizeof(udp6_addr), 0);
|
|
}
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
udp_set_no_check6_tx(sock->sk, !cfg->use_udp6_tx_checksums);
|
|
udp_set_no_check6_rx(sock->sk, !cfg->use_udp6_rx_checksums);
|
|
|
|
*sockp = sock;
|
|
return 0;
|
|
|
|
error:
|
|
if (sock) {
|
|
kernel_sock_shutdown(sock, SHUT_RDWR);
|
|
sk_release_kernel(sock->sk);
|
|
}
|
|
*sockp = NULL;
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(udp_sock_create6);
|
|
|
|
int udp_tunnel6_xmit_skb(struct socket *sock, struct dst_entry *dst,
|
|
struct sk_buff *skb, struct net_device *dev,
|
|
struct in6_addr *saddr, struct in6_addr *daddr,
|
|
__u8 prio, __u8 ttl, __be16 src_port, __be16 dst_port)
|
|
{
|
|
struct udphdr *uh;
|
|
struct ipv6hdr *ip6h;
|
|
struct sock *sk = sock->sk;
|
|
|
|
__skb_push(skb, sizeof(*uh));
|
|
skb_reset_transport_header(skb);
|
|
uh = udp_hdr(skb);
|
|
|
|
uh->dest = dst_port;
|
|
uh->source = src_port;
|
|
|
|
uh->len = htons(skb->len);
|
|
|
|
memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
|
|
IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED
|
|
| IPSKB_REROUTED);
|
|
skb_dst_set(skb, dst);
|
|
|
|
udp6_set_csum(udp_get_no_check6_tx(sk), skb, saddr, daddr, skb->len);
|
|
|
|
__skb_push(skb, sizeof(*ip6h));
|
|
skb_reset_network_header(skb);
|
|
ip6h = ipv6_hdr(skb);
|
|
ip6_flow_hdr(ip6h, prio, htonl(0));
|
|
ip6h->payload_len = htons(skb->len);
|
|
ip6h->nexthdr = IPPROTO_UDP;
|
|
ip6h->hop_limit = ttl;
|
|
ip6h->daddr = *daddr;
|
|
ip6h->saddr = *saddr;
|
|
|
|
ip6tunnel_xmit(skb, dev);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb);
|
|
|
|
MODULE_LICENSE("GPL");
|