static void stt_tnl_destroy(struct vport *vport)
{
struct stt_port *stt_port = stt_vport(vport);
stt_sock_release(stt_port->stt_sock);
ovs_vport_deferred_free(vport);
}
static int stt_get_options(const struct vport *vport,
struct sk_buff *skb)
{
struct stt_port *stt_port = stt_vport(vport);
if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, stt_port->port_no))
return -EMSGSIZE;
return 0;
}
static int stt_tnl_get_options(const struct vport *vport,
struct sk_buff *skb)
{
struct stt_port *stt_port = stt_vport(vport);
struct inet_sock *sk = inet_sk(stt_port->stt_sock->sock->sk);
if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(sk->inet_sport)))
return -EMSGSIZE;
return 0;
}
static int stt_get_egress_tun_info(struct vport *vport, struct sk_buff *skb,
struct ovs_tunnel_info *egress_tun_info)
{
struct stt_port *stt_port = stt_vport(vport);
struct net *net = ovs_dp_get_net(vport->dp);
__be16 dport = inet_sk(stt_port->stt_sock->sock->sk)->inet_sport;
__be16 sport = udp_flow_src_port(net, skb, 1, USHRT_MAX, true);
/* Get tp_src and tp_dst, refert to stt_build_header().
*/
return ovs_tunnel_get_egress_info(egress_tun_info,
ovs_dp_get_net(vport->dp),
OVS_CB(skb)->egress_tun_info,
IPPROTO_TCP, skb->mark, sport, dport);
}
static struct vport *stt_tnl_create(const struct vport_parms *parms)
{
struct net *net = ovs_dp_get_net(parms->dp);
struct nlattr *options = parms->options;
struct stt_port *stt_port;
struct net_device *dev;
struct vport *vport;
struct nlattr *a;
u16 dst_port;
int err;
if (!options) {
err = -EINVAL;
goto error;
}
a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);
if (a && nla_len(a) == sizeof(u16)) {
dst_port = nla_get_u16(a);
} else {
/* Require destination port from userspace. */
err = -EINVAL;
goto error;
}
vport = ovs_vport_alloc(sizeof(struct stt_port),
&ovs_stt_vport_ops, parms);
if (IS_ERR(vport))
return vport;
stt_port = stt_vport(vport);
stt_port->port_no = dst_port;
rtnl_lock();
dev = stt_dev_create_fb(net, parms->name, NET_NAME_USER, dst_port);
if (IS_ERR(dev)) {
rtnl_unlock();
ovs_vport_free(vport);
return ERR_CAST(dev);
}
dev_change_flags(dev, dev->flags | IFF_UP);
rtnl_unlock();
return vport;
error:
return ERR_PTR(err);
}
static struct vport *stt_tnl_create(const struct vport_parms *parms)
{
struct net *net = ovs_dp_get_net(parms->dp);
struct nlattr *options = parms->options;
struct stt_port *stt_port;
struct stt_sock *stt_sock;
struct vport *vport;
struct nlattr *a;
int err;
u16 dst_port;
if (!options) {
err = -EINVAL;
goto error;
}
a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);
if (a && nla_len(a) == sizeof(u16)) {
dst_port = nla_get_u16(a);
} else {
/* Require destination port from userspace. */
err = -EINVAL;
goto error;
}
vport = ovs_vport_alloc(sizeof(struct stt_port),
&ovs_stt_vport_ops, parms);
if (IS_ERR(vport))
return vport;
stt_port = stt_vport(vport);
strncpy(stt_port->name, parms->name, IFNAMSIZ);
stt_sock = stt_sock_add(net, htons(dst_port), stt_rcv, vport);
if (IS_ERR(stt_sock)) {
ovs_vport_free(vport);
return ERR_CAST(stt_sock);
}
stt_port->stt_sock = stt_sock;
return vport;
error:
return ERR_PTR(err);
}
static int stt_tnl_send(struct vport *vport, struct sk_buff *skb)
{
struct net *net = ovs_dp_get_net(vport->dp);
struct stt_port *stt_port = stt_vport(vport);
__be16 dport = inet_sk(stt_port->stt_sock->sock->sk)->inet_sport;
const struct ovs_key_ipv4_tunnel *tun_key;
const struct ovs_tunnel_info *tun_info;
struct rtable *rt;
__be16 sport;
__be32 saddr;
__be16 df;
int err;
tun_info = OVS_CB(skb)->egress_tun_info;
if (unlikely(!tun_info)) {
err = -EINVAL;
goto error;
}
tun_key = &tun_info->tunnel;
/* Route lookup */
saddr = tun_key->ipv4_src;
rt = find_route(ovs_dp_get_net(vport->dp),
&saddr, tun_key->ipv4_dst,
IPPROTO_TCP, tun_key->ipv4_tos,
skb->mark);
if (IS_ERR(rt)) {
err = PTR_ERR(rt);
goto error;
}
df = tun_key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
sport = udp_flow_src_port(net, skb, 1, USHRT_MAX, true);
skb->ignore_df = 1;
return stt_xmit_skb(skb, rt, saddr, tun_key->ipv4_dst,
tun_key->ipv4_tos, tun_key->ipv4_ttl,
df, sport, dport, tun_key->tun_id);
error:
kfree_skb(skb);
return err;
}
static const char *stt_tnl_get_name(const struct vport *vport)
{
return stt_vport(vport)->name;
}