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Diffstat (limited to 'net/ipv4/fou.c')
-rw-r--r--net/ipv4/fou.c153
1 files changed, 129 insertions, 24 deletions
diff --git a/net/ipv4/fou.c b/net/ipv4/fou.c
index 12ce6c526d72..ca95051317ed 100644
--- a/net/ipv4/fou.c
+++ b/net/ipv4/fou.c
@@ -137,7 +137,7 @@ static int gue_udp_recv(struct sock *sk, struct sk_buff *skb)
break;
case 1: {
- /* Direct encasulation of IPv4 or IPv6 */
+ /* Direct encapsulation of IPv4 or IPv6 */
int prot;
@@ -171,9 +171,7 @@ static int gue_udp_recv(struct sock *sk, struct sk_buff *skb)
/* guehdr may change after pull */
guehdr = (struct guehdr *)&udp_hdr(skb)[1];
- hdrlen = sizeof(struct guehdr) + optlen;
-
- if (guehdr->version != 0 || validate_gue_flags(guehdr, optlen))
+ if (validate_gue_flags(guehdr, optlen))
goto drop;
hdrlen = sizeof(struct guehdr) + optlen;
@@ -501,15 +499,45 @@ out_unlock:
return err;
}
-static int fou_add_to_port_list(struct net *net, struct fou *fou)
+static bool fou_cfg_cmp(struct fou *fou, struct fou_cfg *cfg)
+{
+ struct sock *sk = fou->sock->sk;
+ struct udp_port_cfg *udp_cfg = &cfg->udp_config;
+
+ if (fou->family != udp_cfg->family ||
+ fou->port != udp_cfg->local_udp_port ||
+ sk->sk_dport != udp_cfg->peer_udp_port ||
+ sk->sk_bound_dev_if != udp_cfg->bind_ifindex)
+ return false;
+
+ if (fou->family == AF_INET) {
+ if (sk->sk_rcv_saddr != udp_cfg->local_ip.s_addr ||
+ sk->sk_daddr != udp_cfg->peer_ip.s_addr)
+ return false;
+ else
+ return true;
+#if IS_ENABLED(CONFIG_IPV6)
+ } else {
+ if (ipv6_addr_cmp(&sk->sk_v6_rcv_saddr, &udp_cfg->local_ip6) ||
+ ipv6_addr_cmp(&sk->sk_v6_daddr, &udp_cfg->peer_ip6))
+ return false;
+ else
+ return true;
+#endif
+ }
+
+ return false;
+}
+
+static int fou_add_to_port_list(struct net *net, struct fou *fou,
+ struct fou_cfg *cfg)
{
struct fou_net *fn = net_generic(net, fou_net_id);
struct fou *fout;
mutex_lock(&fn->fou_lock);
list_for_each_entry(fout, &fn->fou_list, list) {
- if (fou->port == fout->port &&
- fou->family == fout->family) {
+ if (fou_cfg_cmp(fout, cfg)) {
mutex_unlock(&fn->fou_lock);
return -EALREADY;
}
@@ -587,7 +615,7 @@ static int fou_create(struct net *net, struct fou_cfg *cfg,
sk->sk_allocation = GFP_ATOMIC;
- err = fou_add_to_port_list(net, fou);
+ err = fou_add_to_port_list(net, fou, cfg);
if (err)
goto error;
@@ -607,14 +635,12 @@ error:
static int fou_destroy(struct net *net, struct fou_cfg *cfg)
{
struct fou_net *fn = net_generic(net, fou_net_id);
- __be16 port = cfg->udp_config.local_udp_port;
- u8 family = cfg->udp_config.family;
int err = -EINVAL;
struct fou *fou;
mutex_lock(&fn->fou_lock);
list_for_each_entry(fou, &fn->fou_list, list) {
- if (fou->port == port && fou->family == family) {
+ if (fou_cfg_cmp(fou, cfg)) {
fou_release(fou);
err = 0;
break;
@@ -628,16 +654,27 @@ static int fou_destroy(struct net *net, struct fou_cfg *cfg)
static struct genl_family fou_nl_family;
static const struct nla_policy fou_nl_policy[FOU_ATTR_MAX + 1] = {
- [FOU_ATTR_PORT] = { .type = NLA_U16, },
- [FOU_ATTR_AF] = { .type = NLA_U8, },
- [FOU_ATTR_IPPROTO] = { .type = NLA_U8, },
- [FOU_ATTR_TYPE] = { .type = NLA_U8, },
- [FOU_ATTR_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG, },
+ [FOU_ATTR_PORT] = { .type = NLA_U16, },
+ [FOU_ATTR_AF] = { .type = NLA_U8, },
+ [FOU_ATTR_IPPROTO] = { .type = NLA_U8, },
+ [FOU_ATTR_TYPE] = { .type = NLA_U8, },
+ [FOU_ATTR_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG, },
+ [FOU_ATTR_LOCAL_V4] = { .type = NLA_U32, },
+ [FOU_ATTR_PEER_V4] = { .type = NLA_U32, },
+ [FOU_ATTR_LOCAL_V6] = { .type = sizeof(struct in6_addr), },
+ [FOU_ATTR_PEER_V6] = { .type = sizeof(struct in6_addr), },
+ [FOU_ATTR_PEER_PORT] = { .type = NLA_U16, },
+ [FOU_ATTR_IFINDEX] = { .type = NLA_S32, },
};
static int parse_nl_config(struct genl_info *info,
struct fou_cfg *cfg)
{
+ bool has_local = false, has_peer = false;
+ struct nlattr *attr;
+ int ifindex;
+ __be16 port;
+
memset(cfg, 0, sizeof(*cfg));
cfg->udp_config.family = AF_INET;
@@ -659,8 +696,7 @@ static int parse_nl_config(struct genl_info *info,
}
if (info->attrs[FOU_ATTR_PORT]) {
- __be16 port = nla_get_be16(info->attrs[FOU_ATTR_PORT]);
-
+ port = nla_get_be16(info->attrs[FOU_ATTR_PORT]);
cfg->udp_config.local_udp_port = port;
}
@@ -673,6 +709,52 @@ static int parse_nl_config(struct genl_info *info,
if (info->attrs[FOU_ATTR_REMCSUM_NOPARTIAL])
cfg->flags |= FOU_F_REMCSUM_NOPARTIAL;
+ if (cfg->udp_config.family == AF_INET) {
+ if (info->attrs[FOU_ATTR_LOCAL_V4]) {
+ attr = info->attrs[FOU_ATTR_LOCAL_V4];
+ cfg->udp_config.local_ip.s_addr = nla_get_in_addr(attr);
+ has_local = true;
+ }
+
+ if (info->attrs[FOU_ATTR_PEER_V4]) {
+ attr = info->attrs[FOU_ATTR_PEER_V4];
+ cfg->udp_config.peer_ip.s_addr = nla_get_in_addr(attr);
+ has_peer = true;
+ }
+#if IS_ENABLED(CONFIG_IPV6)
+ } else {
+ if (info->attrs[FOU_ATTR_LOCAL_V6]) {
+ attr = info->attrs[FOU_ATTR_LOCAL_V6];
+ cfg->udp_config.local_ip6 = nla_get_in6_addr(attr);
+ has_local = true;
+ }
+
+ if (info->attrs[FOU_ATTR_PEER_V6]) {
+ attr = info->attrs[FOU_ATTR_PEER_V6];
+ cfg->udp_config.peer_ip6 = nla_get_in6_addr(attr);
+ has_peer = true;
+ }
+#endif
+ }
+
+ if (has_peer) {
+ if (info->attrs[FOU_ATTR_PEER_PORT]) {
+ port = nla_get_be16(info->attrs[FOU_ATTR_PEER_PORT]);
+ cfg->udp_config.peer_udp_port = port;
+ } else {
+ return -EINVAL;
+ }
+ }
+
+ if (info->attrs[FOU_ATTR_IFINDEX]) {
+ if (!has_local)
+ return -EINVAL;
+
+ ifindex = nla_get_s32(info->attrs[FOU_ATTR_IFINDEX]);
+
+ cfg->udp_config.bind_ifindex = ifindex;
+ }
+
return 0;
}
@@ -704,15 +786,37 @@ static int fou_nl_cmd_rm_port(struct sk_buff *skb, struct genl_info *info)
static int fou_fill_info(struct fou *fou, struct sk_buff *msg)
{
+ struct sock *sk = fou->sock->sk;
+
if (nla_put_u8(msg, FOU_ATTR_AF, fou->sock->sk->sk_family) ||
nla_put_be16(msg, FOU_ATTR_PORT, fou->port) ||
+ nla_put_be16(msg, FOU_ATTR_PEER_PORT, sk->sk_dport) ||
nla_put_u8(msg, FOU_ATTR_IPPROTO, fou->protocol) ||
- nla_put_u8(msg, FOU_ATTR_TYPE, fou->type))
+ nla_put_u8(msg, FOU_ATTR_TYPE, fou->type) ||
+ nla_put_s32(msg, FOU_ATTR_IFINDEX, sk->sk_bound_dev_if))
return -1;
if (fou->flags & FOU_F_REMCSUM_NOPARTIAL)
if (nla_put_flag(msg, FOU_ATTR_REMCSUM_NOPARTIAL))
return -1;
+
+ if (fou->sock->sk->sk_family == AF_INET) {
+ if (nla_put_in_addr(msg, FOU_ATTR_LOCAL_V4, sk->sk_rcv_saddr))
+ return -1;
+
+ if (nla_put_in_addr(msg, FOU_ATTR_PEER_V4, sk->sk_daddr))
+ return -1;
+#if IS_ENABLED(CONFIG_IPV6)
+ } else {
+ if (nla_put_in6_addr(msg, FOU_ATTR_LOCAL_V6,
+ &sk->sk_v6_rcv_saddr))
+ return -1;
+
+ if (nla_put_in6_addr(msg, FOU_ATTR_PEER_V6, &sk->sk_v6_daddr))
+ return -1;
+#endif
+ }
+
return 0;
}
@@ -765,7 +869,7 @@ static int fou_nl_cmd_get_port(struct sk_buff *skb, struct genl_info *info)
ret = -ESRCH;
mutex_lock(&fn->fou_lock);
list_for_each_entry(fout, &fn->fou_list, list) {
- if (port == fout->port && family == fout->family) {
+ if (fou_cfg_cmp(fout, &cfg)) {
ret = fou_dump_info(fout, info->snd_portid,
info->snd_seq, 0, msg,
info->genlhdr->cmd);
@@ -809,21 +913,21 @@ static int fou_nl_dump(struct sk_buff *skb, struct netlink_callback *cb)
static const struct genl_ops fou_nl_ops[] = {
{
.cmd = FOU_CMD_ADD,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = fou_nl_cmd_add_port,
- .policy = fou_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = FOU_CMD_DEL,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = fou_nl_cmd_rm_port,
- .policy = fou_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = FOU_CMD_GET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = fou_nl_cmd_get_port,
.dumpit = fou_nl_dump,
- .policy = fou_nl_policy,
},
};
@@ -832,6 +936,7 @@ static struct genl_family fou_nl_family __ro_after_init = {
.name = FOU_GENL_NAME,
.version = FOU_GENL_VERSION,
.maxattr = FOU_ATTR_MAX,
+ .policy = fou_nl_policy,
.netnsok = true,
.module = THIS_MODULE,
.ops = fou_nl_ops,
@@ -1035,7 +1140,7 @@ static int gue_err(struct sk_buff *skb, u32 info)
case 0: /* Full GUE header present */
break;
case 1: {
- /* Direct encasulation of IPv4 or IPv6 */
+ /* Direct encapsulation of IPv4 or IPv6 */
skb_set_transport_header(skb, -(int)sizeof(struct icmphdr));
switch (((struct iphdr *)guehdr)->version) {