Diff: vz_protocol.cpp

Revision:

69:65665afbad5d

Parent:

67:cdedc64d9921

Child:

70:714c33487aae

--- a/vz_protocol.cpp	Fri Nov 07 17:57:55 2014 +0000
+++ b/vz_protocol.cpp	Wed Nov 12 13:25:54 2014 +0000
@@ -9,17 +9,6 @@
 uint16_t pkg_cksok = 0;
     
 uint8_t * __parse_vz_pkg__( int * ext, int * port, volatile uint8_t * type, uint8_t * cb_buffer ){
-    /**
-    * parse and split vz package,
-    * | E | E | P | P | C | C | T | [ Seq_num | Audio ] | 14[ Clock | Audio ] | [ TS | Audio ] | ... |
-    * E = Ext = Ramal
-    * P = Port = Porta
-    * C = Checksum
-    * T = Type = Tipo
-    * Seq_num = Sequence Number = Numero de sequencia
-    * Clock = 14 bytes to sync
-    * ... = demais __CB_BUFFER_SIZE__ - __VZ_HEADER_OFFSET__  bytes
-    */   
     uint8_t p_lsb, p_msb;
     uint8_t e_lsb, e_msb;
     
@@ -211,6 +200,8 @@
 }
 
 uint16_t __checksum__( uint8_t * buffer, size_t length ){
+        if( !buffer ) return( 0 );
+
     uint16_t cc = 0x00;
     buffer[ 4 ] = buffer[ 5 ] = 0x5a;
     for( register int i = 0; i < length; i++ ){
@@ -236,6 +227,8 @@
         time( &seconds );
         ts = *localtime( &seconds );
    //}
+
+        if( !buffer ) return;
     
     int ano = ts.tm_year + 1900;
     int mes = ts.tm_mon + 1;