fix default case warnings, add to warning list

configure.in

@@ -465,7 +465,7 @@ CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
 LIB_SOCKET_NSL
 
 dnl Various GCC warnings that should never fire for release quality code
-GCCWARNINGS="-Wall -fno-strict-aliasing -W -Wfloat-equal -Wundef       \
+GCCWARNINGS="-Wall -fno-strict-aliasing -W -Wfloat-equal -Wundef        \
 -Wpointer-arith -Wstrict-prototypes -Wmissing-prototypes                \
 -Wwrite-strings -Wredundant-decls -Wchar-subscripts -Wcomment           \
 -Wformat=2 -Wwrite-strings -Wmissing-declarations -Wredundant-decls     \
@@ -473,7 +473,8 @@ GCCWARNINGS="-Wall -fno-strict-aliasing -W -Wfloat-equal -Wundef       \
 -Wmissing-field-initializers -Wdeclaration-after-statement              \
 -Wold-style-definition -Waddress -Wmissing-noreturn -Wnormalized=id     \
 -Woverride-init -Wstrict-overflow=1 -Wextra -Warray-bounds              \
--Wstack-protector -Wformat -Wformat-security -Wpointer-sign -Wshadow"
+-Wstack-protector -Wformat -Wformat-security -Wpointer-sign -Wshadow    \
+-Wswitch-default"
 
 AC_ARG_ENABLE(gcc-lots-o-warnings,
 AS_HELP_STRING(--enable-gcc-lots-o-warnings, Enable lots of gcc warnings (default: disabled)),

ctaocrypt/src/aes.c

@@ -922,6 +922,9 @@ int AesSetKey(Aes* aes, const byte* userKey, word32 keylen, const byte* iv,
             rk += 8;
         }
         break;
+
+    default:
+        return BAD_FUNC_ARG;
     }
 
     if (dir == AES_DECRYPTION)

include/cyassl_error.h

@@ -31,6 +31,7 @@
 #endif
 
 enum CyaSSL_ErrorCodes {
+    INPUT_CASE_ERROR       = -201,            /* process input state error */
     PREFIX_ERROR           = -202,            /* bad index to key rounds  */
     MEMORY_ERROR           = -203,            /* out of memory            */
     VERIFY_FINISHED_ERROR  = -204,            /* verify problem on finished */

src/cyassl_int.c

@@ -1089,6 +1089,9 @@ retry:
             case IO_ERR_CONN_CLOSE:     /* peer closed connection */
                 ssl->options.isClosed = 1;
                 return -1;
+
+            default:
+                return recvd;
         }
 
     return recvd;
@@ -1168,6 +1171,9 @@ int SendBuffered(SSL* ssl)
                 case IO_ERR_CONN_CLOSE: /* epipe / conn closed, same as reset */
                     ssl->options.connReset = 1;
                     break;
+
+                default:
+                    return SOCKET_ERROR_E;
             }
 
             return SOCKET_ERROR_E;
@@ -1827,6 +1833,9 @@ static INLINE void Encrypt(SSL* ssl, byte* out, const byte* input, word32 sz)
                 RabbitProcess(&ssl->encrypt.rabbit, out, input, sz);
                 break;
         #endif
+
+            default:
+                CYASSL_MSG("CyaSSL Encrypt programming error");
     }
 }
 
@@ -1863,6 +1872,9 @@ static INLINE void Decrypt(SSL* ssl, byte* plain, const byte* input, word32 sz)
                 RabbitProcess(&ssl->decrypt.rabbit, plain, input, sz);
                 break;
         #endif
+
+            default:
+                CYASSL_MSG("CyaSSL Decrypt programming error");
     }
 }
 
@@ -2310,6 +2322,9 @@ int ProcessReply(SSL* ssl)
                 ssl->options.processReply = doProcessInit;
                 continue;
             }
+        default:
+            CYASSL_MSG("Bad process input state, programming error");
+            return INPUT_CASE_ERROR;
         }
     }
 }
@@ -2972,6 +2987,10 @@ void SetErrorString(int error, char* str)
         XSTRNCPY(str, "unsupported cipher suite", max);
         break;
 
+    case INPUT_CASE_ERROR :
+        XSTRNCPY(str, "input state error", max);
+        break;
+
     case PREFIX_ERROR :
         XSTRNCPY(str, "bad index to key rounds", max);
         break;