From 73cf3317065a6bc1536b4fb6f51bff4d3138f8ac Mon Sep 17 00:00:00 2001 From: stephen hemminger Date: Sat, 27 Apr 2013 11:31:54 +0000 Subject: [PATCH] vxlan: fix byte order issues with NDA_PORT The NDA_PORT attribute was added, but the author wasn't careful about width (port is 16 bits), or byte order. The attribute was being dumped as 16 bits, but only 32 bit value would be accepted when setting up a device. Also, the remote port is in network byte order and was being compared with default port in host byte order. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- drivers/net/vxlan.c | 28 +++++++++++++++------------- 1 file changed, 15 insertions(+), 13 deletions(-) diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index e6a3d4737df2..e6ac16cd9ba2 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -192,7 +192,7 @@ static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, if (send_ip && nla_put_be32(skb, NDA_DST, rdst->remote_ip)) goto nla_put_failure; - if (rdst->remote_port && rdst->remote_port != vxlan_port && + if (rdst->remote_port && rdst->remote_port != htons(vxlan_port) && nla_put_be16(skb, NDA_PORT, rdst->remote_port)) goto nla_put_failure; if (rdst->remote_vni != vxlan->default_dst.remote_vni && @@ -222,7 +222,7 @@ static inline size_t vxlan_nlmsg_size(void) return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ + nla_total_size(sizeof(__be32)) /* NDA_DST */ - + nla_total_size(sizeof(__be32)) /* NDA_PORT */ + + nla_total_size(sizeof(__be16)) /* NDA_PORT */ + nla_total_size(sizeof(__be32)) /* NDA_VNI */ + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ + nla_total_size(sizeof(struct nda_cacheinfo)); @@ -317,7 +317,7 @@ static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, /* Add/update destinations for multicast */ static int vxlan_fdb_append(struct vxlan_fdb *f, - __be32 ip, __u32 port, __u32 vni, __u32 ifindex) + __be32 ip, __be16 port, __u32 vni, __u32 ifindex) { struct vxlan_rdst *rd_prev, *rd; @@ -346,7 +346,7 @@ static int vxlan_fdb_append(struct vxlan_fdb *f, static int vxlan_fdb_create(struct vxlan_dev *vxlan, const u8 *mac, __be32 ip, __u16 state, __u16 flags, - __u32 port, __u32 vni, __u32 ifindex, + __be16 port, __u32 vni, __u32 ifindex, __u8 ndm_flags) { struct vxlan_fdb *f; @@ -444,7 +444,8 @@ static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], struct vxlan_dev *vxlan = netdev_priv(dev); struct net *net = dev_net(vxlan->dev); __be32 ip; - u32 port, vni, ifindex; + __be16 port; + u32 vni, ifindex; int err; if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { @@ -462,11 +463,11 @@ static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], ip = nla_get_be32(tb[NDA_DST]); if (tb[NDA_PORT]) { - if (nla_len(tb[NDA_PORT]) != sizeof(u32)) + if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) return -EINVAL; - port = nla_get_u32(tb[NDA_PORT]); + port = nla_get_be16(tb[NDA_PORT]); } else - port = vxlan_port; + port = htons(vxlan_port); if (tb[NDA_VNI]) { if (nla_len(tb[NDA_VNI]) != sizeof(u32)) @@ -489,8 +490,8 @@ static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], ifindex = 0; spin_lock_bh(&vxlan->hash_lock); - err = vxlan_fdb_create(vxlan, addr, ip, ndm->ndm_state, flags, port, - vni, ifindex, ndm->ndm_flags); + err = vxlan_fdb_create(vxlan, addr, ip, ndm->ndm_state, flags, + port, vni, ifindex, ndm->ndm_flags); spin_unlock_bh(&vxlan->hash_lock); return err; @@ -964,12 +965,13 @@ static netdev_tx_t vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, struct udphdr *uh; struct flowi4 fl4; __be32 dst; - __u16 src_port, dst_port; + __u16 src_port; + __be16 dst_port; u32 vni; __be16 df = 0; __u8 tos, ttl; - dst_port = rdst->remote_port ? rdst->remote_port : vxlan_port; + dst_port = rdst->remote_port ? rdst->remote_port : htons(vxlan_port); vni = rdst->remote_vni; dst = rdst->remote_ip; @@ -1050,7 +1052,7 @@ static netdev_tx_t vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, skb_reset_transport_header(skb); uh = udp_hdr(skb); - uh->dest = htons(dst_port); + uh->dest = dst_port; uh->source = htons(src_port); uh->len = htons(skb->len); -- 2.20.1