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authorPeter Krystad <peter.krystad@linux.intel.com>2020-01-21 16:56:18 -0800
committerDavid S. Miller <davem@davemloft.net>2020-01-24 13:44:07 +0100
commitcec37a6e41aae7bf3df9a3da783380a4d9325fd8 (patch)
treed4019305db6e52408252d9b14a566f0199c3bc85 /include/net
parent2303f994b3e187091fd08148066688b08f837efc (diff)
mptcp: Handle MP_CAPABLE options for outgoing connections
Add hooks to tcp_output.c to add MP_CAPABLE to an outgoing SYN request, to capture the MP_CAPABLE in the received SYN-ACK, to add MP_CAPABLE to the final ACK of the three-way handshake. Use the .sk_rx_dst_set() handler in the subflow proto to capture when the responding SYN-ACK is received and notify the MPTCP connection layer. Co-developed-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Co-developed-by: Florian Westphal <fw@strlen.de> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Peter Krystad <peter.krystad@linux.intel.com> Signed-off-by: Christoph Paasch <cpaasch@apple.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/mptcp.h57
1 files changed, 57 insertions, 0 deletions
diff --git a/include/net/mptcp.h b/include/net/mptcp.h
index 3daec2ceb3ff..eabc57c3fde4 100644
--- a/include/net/mptcp.h
+++ b/include/net/mptcp.h
@@ -39,8 +39,27 @@ struct mptcp_out_options {
void mptcp_init(void);
+static inline bool sk_is_mptcp(const struct sock *sk)
+{
+ return tcp_sk(sk)->is_mptcp;
+}
+
+static inline bool rsk_is_mptcp(const struct request_sock *req)
+{
+ return tcp_rsk(req)->is_mptcp;
+}
+
void mptcp_parse_option(const unsigned char *ptr, int opsize,
struct tcp_options_received *opt_rx);
+bool mptcp_syn_options(struct sock *sk, unsigned int *size,
+ struct mptcp_out_options *opts);
+void mptcp_rcv_synsent(struct sock *sk);
+bool mptcp_synack_options(const struct request_sock *req, unsigned int *size,
+ struct mptcp_out_options *opts);
+bool mptcp_established_options(struct sock *sk, struct sk_buff *skb,
+ unsigned int *size, unsigned int remaining,
+ struct mptcp_out_options *opts);
+
void mptcp_write_options(__be32 *ptr, struct mptcp_out_options *opts);
/* move the skb extension owership, with the assumption that 'to' is
@@ -89,11 +108,47 @@ static inline void mptcp_init(void)
{
}
+static inline bool sk_is_mptcp(const struct sock *sk)
+{
+ return false;
+}
+
+static inline bool rsk_is_mptcp(const struct request_sock *req)
+{
+ return false;
+}
+
static inline void mptcp_parse_option(const unsigned char *ptr, int opsize,
struct tcp_options_received *opt_rx)
{
}
+static inline bool mptcp_syn_options(struct sock *sk, unsigned int *size,
+ struct mptcp_out_options *opts)
+{
+ return false;
+}
+
+static inline void mptcp_rcv_synsent(struct sock *sk)
+{
+}
+
+static inline bool mptcp_synack_options(const struct request_sock *req,
+ unsigned int *size,
+ struct mptcp_out_options *opts)
+{
+ return false;
+}
+
+static inline bool mptcp_established_options(struct sock *sk,
+ struct sk_buff *skb,
+ unsigned int *size,
+ unsigned int remaining,
+ struct mptcp_out_options *opts)
+{
+ return false;
+}
+
static inline void mptcp_skb_ext_move(struct sk_buff *to,
const struct sk_buff *from)
{
@@ -107,6 +162,8 @@ static inline bool mptcp_skb_can_collapse(const struct sk_buff *to,
#endif /* CONFIG_MPTCP */
+void mptcp_handle_ipv6_mapped(struct sock *sk, bool mapped);
+
#if IS_ENABLED(CONFIG_MPTCP_IPV6)
int mptcpv6_init(void);
#elif IS_ENABLED(CONFIG_IPV6)