asn1.h

/*NB_REVISION*/
 
/*NB_COPYRIGHT*/
 
#ifndef _ASN1_H_
#define _ASN1_H_
 
#define ASNERR_TOO_int32_t -5  /* data too long for provided buffer */
 
#define ASNERR_ASN_ENCODE      -6
#define ASNERR_ASN_DECODE      -7
#define ASNERR_PDU_TRANSLATION -8
#define ASNERR_OS_ERR          -9
#define ASNERR_INVALID_TXTOID  -10
 
#define ASNERR_UNABLE_TO_FIX   -11
#define ASNERR_UNSUPPORTED_TYPE -12
#define ASNERR_PDU_PARSE        -13
#define ASNERR_PACKET_ERR      -14
#define ASNERR_WRONG_TYPE      -15
#define ASNERR_ENDOFPACKET     -16
 
 
 
class UDPPacket; /* Forward declaration */
 
class ASN
{
      UDPPacket *m_pPkt;
      uint8_t *protected_bufp;
      uint16_t  protected_len;
      BOOL bOverSize;
 
 
   //   uint8_t *bufp;
   //   uint16_t  len;
 
 
      uint16_t put_header_offset;
 
 
      int parse_length();
 
      void StoreByte(uint8_t b)
      {
          *protected_bufp++=b;
          protected_len++;
          if(protected_len>=(MAX_UDPDATA-20))
          {
              protected_len--;
              protected_bufp--;
              bOverSize=TRUE;
          }
      };
 
      void StoreWord(uint16_t w) {StoreByte(w>>8); StoreByte(w&0xff);};
 
      /* Return 1 if there is an eeror */
   public:
      int RootParse( int &length, uint8_t &rv_type );
 
 
 
      int error;
 
 
      ASN( UDPPacket &up );
      ASN();
      ~ASN();
      void AttachPacket( UDPPacket &up );
      UDPPacket *DetachPacket();
      void ResetPacket();
 
 
      uint8_t GetHeader(); /* Parst ASN header */
      uint8_t GetHeaderwLen( int &objlen ); /* Parse ASN header */
      int GetInt(); /* Type of int */
      uint32_t GetUInt(); /* Unsigned int */
      int GetOctets( uint8_t *pData, int len );
      int GetOid( int *dest );
      int GetNullObject();
      IPADDR GetIPAddr();
      uint32_t GetGauge32();
      uint32_t GetCounter32();
      uint32_t GetTimeTick();
      long long GetCounter64();
      int GetOpaque( uint8_t *pData, int &len );
      void EatBytes( int len );
 
      int PeekType( uint8_t &type );
 
 
      void PutHeader( uint8_t typ ); /* Put ASN header */
      void FixUpHeader(); /*When putting together a structure one has to fix up the header length*/
      /*Always called in a depth first order.
            They can be at the same level, but not nested out of order
                /-PutHeader (a)
       | /-PutHeader (b)
       | | /-PutHeader (c)
       | | \-FixUpHeader(c)
       | \-FixUpHeader(b)
       | /-PutHeader (d)
       | \-FixUpHeader(d)
       \-FixUpHeader (a)
         */
 
      void PutInt( int ); /* Type of int */
      void PutUInt( uint32_t ); /* Unsigned int */
      void PutOctets( const uint8_t *pData, int  len );
      void PutOctetString( const char * );
      void PutOid( int *oid );
      void PutOidFromString( const char * );
      void PutOidFromCoid( const char * );
      void PutNullObject();
      void PutIPAddr( IPADDR );
      void PutGauge32( uint32_t val );
      void PutCounter32( uint32_t val );
      void PutTimeTick( uint32_t val );
      void PutCounter64( long long val );
      void PutOpaque( uint8_t *pData, int len );
      void Put_NOSUCHINSTANCE();
      void Put_NOSUCHOBJECT();
      void Put_ENDOFMIBVIEW();
      void PutV1_NOSUCHOBJECT();
      void PutRawUnsigned( uint8_t type, uint32_t val );
 
      void PutCopyBlock(ASN & from);
 
 
      int PeekLen();
      puint8_t GetpData()
      {
         return protected_bufp;
      }
      void FixSize();
      //Debugging fiunction.
      void ShowRemainder();
      bool OverSize() {return bOverSize; };
 
};
 
void PrintOid( const int *oid );
#ifdef FILE
void fPrintOid( FILE *fp, const int *oidmlen );
#endif
 
 
int CompOid( const int *pOid, const int *pOid2 );
 
int CompOid( const int *pOid, const char *s );
 
 
#define MAX_SUBID   0xFFFFFFFF
 
 
#define MAX_OID_LEN      128  /* max subid's in an oid, per SNMP spec. */
 
#define ASN_BOOLEAN      (0x01)
#define ASN_INTEGER      (0x02)
#define ASN_BIT_STR      (0x03)
#define ASN_OCTET_STR       (0x04)
#define ASN_NULL      (0x05)
#define ASN_OBJECT_ID       (0x06)
#define ASN_SEQUENCE     (0x10)
#define ASN_SET          (0x11)
 
#define ASN_UNIVERSAL       (0x00)
#define ASN_APPLICATION     (0x40)
#define ASN_CONTEXT      (0x80)
#define ASN_PRIVATE      (0xC0)
 
#define ASN_PRIMITIVE       (0x00)
#define ASN_CONSTRUCTOR     (0x20)
 
#define ASN_int32_t_LEN     (0x80)
#define ASN_EXTENSION_ID    (0x1F)
#define ASN_BIT8      (0x80)
 
#define IS_CONSTRUCTOR(byte)  ((byte) & ASN_CONSTRUCTOR)
#define IS_EXTENSION_ID(byte) (((byte) & ASN_EXTENSION_ID) == ASN_EXTENSION_ID)
 
 
 
 
#define SMI_INTEGER     ASN_INTEGER
#define SMI_STRING      ASN_OCTET_STR
#define SMI_OBJID       ASN_OBJECT_ID
#define SMI_NULLOBJ     ASN_NULL
#define SMI_IPADDRESS  (ASN_APPLICATION | 0) /* OCTET STRING, net byte order */
#define SMI_COUNTER32  (ASN_APPLICATION | 1) /* INTEGER */
#define SMI_GAUGE32    (ASN_APPLICATION | 2) /* INTEGER */
#define SMI_UNSIGNED32 SMI_GAUGE32
#define SMI_TIMETICKS  (ASN_APPLICATION | 3) /* INTEGER */
#define SMI_OPAQUE     (ASN_APPLICATION | 4) /* OCTET STRING */
#define SMI_COUNTER64  (ASN_APPLICATION | 6) /* INTEGER */
 
#define SMI_NOSUCHOBJECT   (ASN_CONTEXT | ASN_PRIMITIVE | 0x0)
#define SMI_NOSUCHINSTANCE (ASN_CONTEXT | ASN_PRIMITIVE | 0x1)
#define SMI_ENDOFMIBVIEW   (ASN_CONTEXT | ASN_PRIMITIVE | 0x2)
 
 
#define SNMP_PDU_GET     (ASN_CONTEXT | ASN_CONSTRUCTOR | 0x0)
#define SNMP_PDU_GETNEXT    (ASN_CONTEXT | ASN_CONSTRUCTOR | 0x1)
#define SNMP_PDU_RESPONSE   (ASN_CONTEXT | ASN_CONSTRUCTOR | 0x2)
#define SNMP_PDU_SET        (ASN_CONTEXT | ASN_CONSTRUCTOR | 0x3)
#define SNMP_PDU_TRAP       (ASN_CONTEXT | ASN_CONSTRUCTOR | 0x4)
#define TRP_REQ_MSG      (ASN_CONTEXT | ASN_CONSTRUCTOR | 0x4) /*Obsolete*/
#define SNMP_PDU_GETBULK    (ASN_CONTEXT | ASN_CONSTRUCTOR | 0x5)
#define SNMP_PDU_INFORM     (ASN_CONTEXT | ASN_CONSTRUCTOR | 0x6)
#define SNMP_PDU_V2TRAP     (ASN_CONTEXT | ASN_CONSTRUCTOR | 0x7)
#define SNMP_PDU_REPORT     (ASN_CONTEXT | ASN_CONSTRUCTOR | 0x8)
#define SNMP_VERSION_1      0 /* RFC 1157 */
#define SNMP_VERSION_2      1 /* RFC 1901 */
 
 
#define SNMP_ERR_NOERROR             (0x0)
#define SNMP_ERR_TOOBIG              (0x1)
#define SNMP_ERR_NOSUCHNAME          (0x2)
#define SNMP_ERR_BADVALUE            (0x3)
#define SNMP_ERR_READONLY            (0x4)
#define SNMP_ERR_GENERR              (0x5)
 
#define SNMP_COLDSTART_TRAP          (0x0)
#define SNMP_WARMSTART_TRAP          (0x1)
#define SNMP_LINKDOWN_TRAP           (0x2)
#define SNMP_LINKUP_TRAP             (0x3)
#define SNMP_AUTHENTICATIONFAIL_TRAP (0x4)
#define SNMP_ENTERPRISE_TRAP         (0x6)
 
 
 
 
 
#endif /* _ASN1_H_ */