TCPCT part 1b: generate Responder Cookie secret

[firefly-linux-kernel-4.4.55.git] / include / net / tcp.h

diff --git a/include/net/tcp.h b/include/net/tcp.h
index bf20f88fd0338cb7920eb505fc3c47e45d9591a7..4a99a8e391212b98572500ea03658a3635e3acef 100644 (file)
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -62,9 +62,6 @@ extern void tcp_time_wait(struct sock *sk, int state, int timeo);
 /* Minimal accepted MSS. It is (60+60+8) - (20+20). */
 #define TCP_MIN_MSS            88U
 
-/* Minimal RCV_MSS. */
-#define TCP_MIN_RCVMSS         536U
-
 /* The least MTU to use for probing */
 #define TCP_BASE_MSS           512
 
@@ -443,7 +440,8 @@ extern int                  tcp_connect(struct sock *sk);
 
 extern struct sk_buff *                tcp_make_synack(struct sock *sk,
                                                struct dst_entry *dst,
-                                               struct request_sock *req);
+                                               struct request_sock *req,
+                                               struct request_values *rvp);
 
 extern int                     tcp_disconnect(struct sock *sk, int flags);
 
@@ -1480,6 +1478,14 @@ struct tcp_request_sock_ops {
 #endif
 };
 
+/* Using SHA1 for now, define some constants.
+ */
+#define COOKIE_DIGEST_WORDS (SHA_DIGEST_WORDS)
+#define COOKIE_MESSAGE_WORDS (SHA_MESSAGE_BYTES / 4)
+#define COOKIE_WORKSPACE_WORDS (COOKIE_DIGEST_WORDS + COOKIE_MESSAGE_WORDS)
+
+extern int tcp_cookie_generator(u32 *bakery);
+
 extern void tcp_v4_init(void);
 extern void tcp_init(void);