site: Change return value of decrypt_msg0

The caller is going to want to do something more subtle.

No functional change.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/site.c b/site.c
index 0db109f239ebf9bab6ae84b163e6ce864aa3fd94..bc902ad92397c3fcf94a3bdab1e7ff0ff559a78d 100644 (file)
--- a/site.c
+++ b/site.c
@@ -1072,7 +1072,8 @@ static bool_t process_msg6(struct site *st, struct buffer_if *msg6,
     return True;
 }
 
-static bool_t decrypt_msg0(struct site *st, struct buffer_if *msg0,
+static transform_apply_return
+decrypt_msg0(struct site *st, struct buffer_if *msg0,
                           const struct comm_addr *src)
 {
     cstring_t transform_err, auxkey_err, newkey_err="n/a";
@@ -1090,7 +1091,7 @@ static bool_t decrypt_msg0(struct site *st, struct buffer_if *msg0,
        if (!st->auxiliary_is_new)
            delete_one_key(st,&st->auxiliary_key,
                           "peer has used new key","auxiliary key",LOG_SEC);
-       return True;
+       return 0;
     }
     if (problem==transform_apply_seqrange)
        goto skew;
@@ -1115,7 +1116,7 @@ static bool_t decrypt_msg0(struct site *st, struct buffer_if *msg0,
            st->auxiliary_is_new=0;
            st->renegotiate_key_time=st->auxiliary_renegotiate_key_time;
        }
-       return True;
+       return 0;
     }
     if (problem==transform_apply_seqrange)
        goto skew;
@@ -1131,7 +1132,7 @@ static bool_t decrypt_msg0(struct site *st, struct buffer_if *msg0,
            BUF_FREE(&st->buffer);
            st->timeout=0;
            activate_new_key(st);
-           return True; /* do process the data in this packet */
+           return 0; /* do process the data in this packet */
        }
        if (problem==transform_apply_seqrange)
            goto skew;
@@ -1141,7 +1142,8 @@ static bool_t decrypt_msg0(struct site *st, struct buffer_if *msg0,
         transform_err,auxkey_err,newkey_err);
     initiate_key_setup(st,"incoming message would not decrypt",0);
     send_nak(src,m.dest,m.source,m.type,msg0,"message would not decrypt");
-    return False;
+    assert(problem);
+    return problem;
 
  skew:
     slog(st,LOG_DROP,"transform: %s (merely skew)",transform_err);
@@ -1153,8 +1155,10 @@ static bool_t process_msg0(struct site *st, struct buffer_if *msg0,
                           const struct comm_addr *src)
 {
     uint32_t type;
+    transform_apply_return problem;
 
-    if (!decrypt_msg0(st,msg0,src))
+    problem = decrypt_msg0(st,msg0,src);
+    if (problem)
        return False;
 
     CHECK_AVAIL(msg0,4);