/*
- * Copyright (c) 2007-2012 Nicira Networks.
+ * Copyright (c) 2007-2012 Nicira, Inc.
* Distributed under the terms of the GNU GPL version 2.
*
* Significant portions of this file may be copied from parts of the Linux
.secret_interval = CAPWAP_FRAG_SECRET_INTERVAL,
};
-static int capwap_hdr_len(const struct tnl_mutable_config *mutable)
+static void get_capwap_param(const struct tnl_mutable_config *mutable,
+ const struct ovs_key_ipv4_tunnel *tun_key,
+ u32 *flags, __be64 *out_key)
+{
+ if (tun_key->ipv4_dst) {
+ *flags = 0;
+
+ if (tun_key->tun_flags & OVS_FLOW_TNL_F_KEY)
+ *flags = TNL_F_OUT_KEY_ACTION;
+ if (tun_key->tun_flags & OVS_FLOW_TNL_F_CSUM)
+ *flags |= TNL_F_CSUM;
+ *out_key = tun_key->tun_id;
+ } else {
+ *flags = mutable->flags;
+ if (mutable->flags & TNL_F_OUT_KEY_ACTION)
+ *out_key = tun_key->tun_id;
+ else
+ *out_key = mutable->out_key;
+
+ }
+}
+
+static int capwap_hdr_len(const struct tnl_mutable_config *mutable,
+ const struct ovs_key_ipv4_tunnel *tun_key)
{
int size = CAPWAP_MIN_HLEN;
+ u32 flags;
+ __be64 out_key;
+
+ get_capwap_param(mutable, tun_key, &flags, &out_key);
/* CAPWAP has no checksums. */
- if (mutable->flags & TNL_F_CSUM)
+ if (flags & TNL_F_CSUM)
return -EINVAL;
/* if keys are specified, then add WSI field */
- if (mutable->out_key || (mutable->flags & TNL_F_OUT_KEY_ACTION)) {
+ if (out_key || (flags & TNL_F_OUT_KEY_ACTION)) {
size += sizeof(struct capwaphdr_wsi) +
sizeof(struct capwaphdr_wsi_key);
}
return size;
}
-static void capwap_build_header(const struct vport *vport,
- const struct tnl_mutable_config *mutable,
- void *header)
+static struct sk_buff *capwap_build_header(const struct vport *vport,
+ const struct tnl_mutable_config *mutable,
+ struct dst_entry *dst,
+ struct sk_buff *skb,
+ int tunnel_hlen)
{
- struct udphdr *udph = header;
+ struct ovs_key_ipv4_tunnel *tun_key = OVS_CB(skb)->tun_key;
+ struct udphdr *udph = udp_hdr(skb);
struct capwaphdr *cwh = (struct capwaphdr *)(udph + 1);
+ u32 flags;
+ __be64 out_key;
+
+ get_capwap_param(mutable, tun_key, &flags, &out_key);
udph->source = htons(CAPWAP_SRC_PORT);
udph->dest = htons(CAPWAP_DST_PORT);
cwh->frag_id = 0;
cwh->frag_off = 0;
- if (mutable->out_key || (mutable->flags & TNL_F_OUT_KEY_ACTION)) {
+ if (out_key || flags & TNL_F_OUT_KEY_ACTION) {
+ /* first field in WSI is key */
struct capwaphdr_wsi *wsi = (struct capwaphdr_wsi *)(cwh + 1);
cwh->begin = CAPWAP_KEYED;
wsi->flags = CAPWAP_WSI_F_KEY64;
wsi->reserved_padding = 0;
- if (mutable->out_key) {
+ if (out_key) {
struct capwaphdr_wsi_key *opt = (struct capwaphdr_wsi_key *)(wsi + 1);
- opt->key = mutable->out_key;
+ opt->key = out_key;
}
} else {
/* make packet readable by old capwap code */
cwh->begin = CAPWAP_NO_WSI;
}
-}
-
-static struct sk_buff *capwap_update_header(const struct vport *vport,
- const struct tnl_mutable_config *mutable,
- struct dst_entry *dst,
- struct sk_buff *skb)
-{
- struct udphdr *udph = udp_hdr(skb);
-
- if (mutable->flags & TNL_F_OUT_KEY_ACTION) {
- /* first field in WSI is key */
- struct capwaphdr *cwh = (struct capwaphdr *)(udph + 1);
- struct capwaphdr_wsi *wsi = (struct capwaphdr_wsi *)(cwh + 1);
- struct capwaphdr_wsi_key *opt = (struct capwaphdr_wsi_key *)(wsi + 1);
-
- opt->key = OVS_CB(skb)->tun_id;
- }
-
udph->len = htons(skb->len - skb_transport_offset(skb));
if (unlikely(skb->len - skb_network_offset(skb) > dst_mtu(dst))) {
- unsigned int hlen = skb_transport_offset(skb) + capwap_hdr_len(mutable);
+ unsigned int hlen = skb_transport_offset(skb) + capwap_hdr_len(mutable, tun_key);
skb = fragment(skb, vport, dst, hlen);
}
return skb;
}
-static int process_capwap_wsi(struct sk_buff *skb, __be64 *key)
+static int process_capwap_wsi(struct sk_buff *skb, __be64 *key, bool *key_present)
{
struct capwaphdr *cwh = capwap_hdr(skb);
struct capwaphdr_wsi *wsi;
opt = (struct capwaphdr_wsi_key *)(wsi + 1);
*key = opt->key;
+ *key_present = true;
+ } else {
+ *key_present = false;
}
return 0;
}
-static struct sk_buff *process_capwap_proto(struct sk_buff *skb, __be64 *key)
+static struct sk_buff *process_capwap_proto(struct sk_buff *skb, __be64 *key, bool *key_present)
{
struct capwaphdr *cwh = capwap_hdr(skb);
int hdr_len = sizeof(struct udphdr);
cwh = capwap_hdr(skb);
}
- if ((cwh->begin & CAPWAP_F_WSI) && process_capwap_wsi(skb, key))
+ if ((cwh->begin & CAPWAP_F_WSI) && process_capwap_wsi(skb, key, key_present))
goto error;
return skb;
struct vport *vport;
const struct tnl_mutable_config *mutable;
struct iphdr *iph;
+ struct ovs_key_ipv4_tunnel tun_key;
__be64 key = 0;
+ bool key_present = false;
if (unlikely(!pskb_may_pull(skb, CAPWAP_MIN_HLEN + ETH_HLEN)))
goto error;
- skb = process_capwap_proto(skb, &key);
+ skb = process_capwap_proto(skb, &key, &key_present);
if (unlikely(!skb))
goto out;
goto error;
}
- if (mutable->flags & TNL_F_IN_KEY_MATCH)
- OVS_CB(skb)->tun_id = key;
- else
- OVS_CB(skb)->tun_id = 0;
+ if (key_present && mutable->key.daddr &&
+ !(mutable->flags & TNL_F_IN_KEY_MATCH))
+ key_present = false;
+
+ tnl_tun_key_init(&tun_key, iph, key, key_present ? OVS_FLOW_TNL_F_KEY : 0);
+ OVS_CB(skb)->tun_key = &tun_key;
- ovs_tnl_rcv(vport, skb, iph->tos);
+ ovs_tnl_rcv(vport, skb);
goto out;
error:
.ipproto = IPPROTO_UDP,
.hdr_len = capwap_hdr_len,
.build_header = capwap_build_header,
- .update_header = capwap_update_header,
};
static inline struct capwap_net *ovs_get_capwap_net(struct net *net)
return &ovs_net->vport_net.capwap;
}
-/* Random value. Irrelevant as long as it's not 0 since we set the handler. */
+/* Arbitrary value. Irrelevant as long as it's not 0 since we set the handler. */
#define UDP_ENCAP_CAPWAP 10
static int init_socket(struct net *net)
{
capwap_net->frag_state.low_thresh = CAPWAP_FRAG_PRUNE_MEM;
inet_frags_init_net(&capwap_net->frag_state);
-
+ udp_encap_enable();
capwap_net->n_tunnels++;
return 0;
git://git.onelab.eu / sliver-openvswitch.git / blobdiff