mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-18 17:54:13 +08:00
9dc621afa8
The build header functions are not used by any other code. net/ipv6/fou6.c:36:5: warning: no previous prototype for ‘fou6_build_header’ [-Wmissing-prototypes] net/ipv6/fou6.c:54:5: warning: no previous prototype for ‘gue6_build_header’ [-Wmissing-prototypes] Need to do some code rearranging to satisfy different Kconfig possiblities. Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
139 lines
2.8 KiB
C
139 lines
2.8 KiB
C
#include <linux/module.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/socket.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/ip.h>
|
|
#include <linux/udp.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <net/fou.h>
|
|
#include <net/ip.h>
|
|
#include <net/ip6_tunnel.h>
|
|
#include <net/ip6_checksum.h>
|
|
#include <net/protocol.h>
|
|
#include <net/udp.h>
|
|
#include <net/udp_tunnel.h>
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6_FOU_TUNNEL)
|
|
|
|
static void fou6_build_udp(struct sk_buff *skb, struct ip_tunnel_encap *e,
|
|
struct flowi6 *fl6, u8 *protocol, __be16 sport)
|
|
{
|
|
struct udphdr *uh;
|
|
|
|
skb_push(skb, sizeof(struct udphdr));
|
|
skb_reset_transport_header(skb);
|
|
|
|
uh = udp_hdr(skb);
|
|
|
|
uh->dest = e->dport;
|
|
uh->source = sport;
|
|
uh->len = htons(skb->len);
|
|
udp6_set_csum(!(e->flags & TUNNEL_ENCAP_FLAG_CSUM6), skb,
|
|
&fl6->saddr, &fl6->daddr, skb->len);
|
|
|
|
*protocol = IPPROTO_UDP;
|
|
}
|
|
|
|
static int fou6_build_header(struct sk_buff *skb, struct ip_tunnel_encap *e,
|
|
u8 *protocol, struct flowi6 *fl6)
|
|
{
|
|
__be16 sport;
|
|
int err;
|
|
int type = e->flags & TUNNEL_ENCAP_FLAG_CSUM6 ?
|
|
SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
|
|
|
|
err = __fou_build_header(skb, e, protocol, &sport, type);
|
|
if (err)
|
|
return err;
|
|
|
|
fou6_build_udp(skb, e, fl6, protocol, sport);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gue6_build_header(struct sk_buff *skb, struct ip_tunnel_encap *e,
|
|
u8 *protocol, struct flowi6 *fl6)
|
|
{
|
|
__be16 sport;
|
|
int err;
|
|
int type = e->flags & TUNNEL_ENCAP_FLAG_CSUM6 ?
|
|
SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
|
|
|
|
err = __gue_build_header(skb, e, protocol, &sport, type);
|
|
if (err)
|
|
return err;
|
|
|
|
fou6_build_udp(skb, e, fl6, protocol, sport);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct ip6_tnl_encap_ops fou_ip6tun_ops = {
|
|
.encap_hlen = fou_encap_hlen,
|
|
.build_header = fou6_build_header,
|
|
};
|
|
|
|
static const struct ip6_tnl_encap_ops gue_ip6tun_ops = {
|
|
.encap_hlen = gue_encap_hlen,
|
|
.build_header = gue6_build_header,
|
|
};
|
|
|
|
static int ip6_tnl_encap_add_fou_ops(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = ip6_tnl_encap_add_ops(&fou_ip6tun_ops, TUNNEL_ENCAP_FOU);
|
|
if (ret < 0) {
|
|
pr_err("can't add fou6 ops\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = ip6_tnl_encap_add_ops(&gue_ip6tun_ops, TUNNEL_ENCAP_GUE);
|
|
if (ret < 0) {
|
|
pr_err("can't add gue6 ops\n");
|
|
ip6_tnl_encap_del_ops(&fou_ip6tun_ops, TUNNEL_ENCAP_FOU);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ip6_tnl_encap_del_fou_ops(void)
|
|
{
|
|
ip6_tnl_encap_del_ops(&fou_ip6tun_ops, TUNNEL_ENCAP_FOU);
|
|
ip6_tnl_encap_del_ops(&gue_ip6tun_ops, TUNNEL_ENCAP_GUE);
|
|
}
|
|
|
|
#else
|
|
|
|
static int ip6_tnl_encap_add_fou_ops(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void ip6_tnl_encap_del_fou_ops(void)
|
|
{
|
|
}
|
|
|
|
#endif
|
|
|
|
static int __init fou6_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = ip6_tnl_encap_add_fou_ops();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __exit fou6_fini(void)
|
|
{
|
|
ip6_tnl_encap_del_fou_ops();
|
|
}
|
|
|
|
module_init(fou6_init);
|
|
module_exit(fou6_fini);
|
|
MODULE_AUTHOR("Tom Herbert <therbert@google.com>");
|
|
MODULE_LICENSE("GPL");
|