prnetdb.h

Netscape NSPR库源码

/***********************************************************************
** FUNCTION: PR_InitializeNetAddr(), 
** DESCRIPTION:
**  Initialize the fields of a PRNetAddr, assigning well known values as
**  appropriate.
**
** INPUTS
**  PRNetAddrValue val  The value to be assigned to the IP Address portion
**                      of the network address. This can only specify the
**                      special well known values that are equivalent to
**                      INADDR_ANY and INADDR_LOOPBACK.
**
**  PRUint16 port       The port number to be assigned in the structure.
**
** OUTPUTS:
**  PRNetAddr *addr     The address to be manipulated.
**
** RETURN:
**  PRStatus            To indicate success or failure. If the latter, the
**                      reason for the failure can be retrieved by calling
**                      PR_GetError();
***********************************************************************/
typedef enum PRNetAddrValue
{
    PR_IpAddrNull,      /* do NOT overwrite the IP address */
    PR_IpAddrAny,       /* assign logical INADDR_ANY to IP address */
    PR_IpAddrLoopback,  /* assign logical INADDR_LOOPBACK  */
    PR_IpAddrV4Mapped   /* IPv4 mapped address */
} PRNetAddrValue;

NSPR_API(PRStatus) PR_InitializeNetAddr(
    PRNetAddrValue val, PRUint16 port, PRNetAddr *addr);

/***********************************************************************
** FUNCTION: PR_SetNetAddr(), 
** DESCRIPTION:
**  Set the fields of a PRNetAddr, assigning well known values as
**  appropriate. This function is similar to PR_InitializeNetAddr
**  but differs in that the address family is specified.
**
** INPUTS
**  PRNetAddrValue val  The value to be assigned to the IP Address portion
**                      of the network address. This can only specify the
**                      special well known values that are equivalent to
**                      INADDR_ANY and INADDR_LOOPBACK.
**
**  PRUint16 af         The address family (either PR_AF_INET or PR_AF_INET6)
**
**  PRUint16 port       The port number to be assigned in the structure.
**
** OUTPUTS:
**  PRNetAddr *addr     The address to be manipulated.
**
** RETURN:
**  PRStatus            To indicate success or failure. If the latter, the
**                      reason for the failure can be retrieved by calling
**                      PR_GetError();
***********************************************************************/
NSPR_API(PRStatus) PR_SetNetAddr(
    PRNetAddrValue val, PRUint16 af, PRUint16 port, PRNetAddr *addr);

/***********************************************************************
** FUNCTION:	
** DESCRIPTION:	PR_IsNetAddrType()
** Determine if the network address is of the specified type.
**
** INPUTS:
**  const PRNetAddr *addr   A network address.
**  PRNetAddrValue          The type of network address 
**
** RETURN:
**  PRBool                  PR_TRUE if the network address is of the
**                          specified type, else PR_FALSE.
***********************************************************************/
NSPR_API(PRBool) PR_IsNetAddrType(const PRNetAddr *addr, PRNetAddrValue val);

/***********************************************************************
** FUNCTION:	
** DESCRIPTION:	PR_ConvertIPv4AddrToIPv6()
** Convert an IPv4 addr to an (IPv4-mapped) IPv6 addr
**
** INPUTS:
**  PRUint32 	v4addr		IPv4 address
**
** OUTPUTS:
**  PRIPv6Addr *v6addr      The converted IPv6 address
**
** RETURN:
**  void
**                       
***********************************************************************/
NSPR_API(void) PR_ConvertIPv4AddrToIPv6(PRUint32 v4addr, PRIPv6Addr *v6addr);

/***********************************************************************
** MACRO:	
** DESCRIPTION:	PR_NetAddrFamily()
** Get the 'family' field of a PRNetAddr union.
**
** INPUTS:
**  const PRNetAddr *addr   A network address.
**
** RETURN:
**  PRUint16                The 'family' field of 'addr'.
***********************************************************************/
#define PR_NetAddrFamily(addr) ((addr)->raw.family)

/***********************************************************************
** MACRO:	
** DESCRIPTION:	PR_NetAddrInetPort()
** Get the 'port' field of a PRNetAddr union.
**
** INPUTS:
**  const PRNetAddr *addr   A network address.
**
** RETURN:
**  PRUint16                The 'port' field of 'addr'.
***********************************************************************/
#define PR_NetAddrInetPort(addr) \
    ((addr)->raw.family == PR_AF_INET6 ? (addr)->ipv6.port : (addr)->inet.port)

/***********************************************************************
** FUNCTION:	
** DESCRIPTION:	PR_GetProtoByName()
** Lookup a protocol entry based on protocol's name
**
** INPUTS:
**  char *protocolname  Character string of the protocol's name.
**  char *buf           A scratch buffer for the runtime to return result.
**                      This buffer is allocated by the caller.
**  PRIntn bufsize      Number of bytes in 'buf'. A recommnded value to
**                      use is PR_NETDB_BUF_SIZE.
** OUTPUTS:
**  PRHostEnt *PRProtoEnt
**                      This structure is filled in by the runtime if
**                      the function returns PR_SUCCESS. This structure
**                      is allocated by the caller.
** RETURN:
**  PRStatus            PR_SUCCESS if the lookup succeeds. If it fails
**                      the result will be PR_FAILURE and the reason
**                      for the failure can be retrieved by PR_GetError().
***********************************************************************/

typedef struct PRProtoEnt {
    char *p_name;       /* official protocol name */
    char **p_aliases;   /* alias list */
#if defined(WIN32) || defined(WIN16)
    PRInt16 p_num;      /* protocol # */
#else
    PRInt32 p_num;      /* protocol # */
#endif
} PRProtoEnt;

NSPR_API(PRStatus) PR_GetProtoByName(
    const char* protocolname, char* buffer, PRInt32 bufsize, PRProtoEnt* result);

/***********************************************************************
** FUNCTION:	
** DESCRIPTION:	PR_GetProtoByNumber()
** Lookup a protocol entry based on protocol's number
**
** INPUTS:
**  PRInt32 protocolnumber
**                      Number assigned to the protocol.
**  char *buf           A scratch buffer for the runtime to return result.
**                      This buffer is allocated by the caller.
**  PRIntn bufsize      Number of bytes in 'buf'. A recommnded value to
**                      use is PR_NETDB_BUF_SIZE.
** OUTPUTS:
**  PRHostEnt *PRProtoEnt
**                      This structure is filled in by the runtime if
**                      the function returns PR_SUCCESS. This structure
**                      is allocated by the caller.
** RETURN:
**  PRStatus            PR_SUCCESS if the lookup succeeds. If it fails
**                      the result will be PR_FAILURE and the reason
**                      for the failure can be retrieved by PR_GetError().
***********************************************************************/
NSPR_API(PRStatus) PR_GetProtoByNumber(
    PRInt32 protocolnumber, char* buffer, PRInt32 bufsize, PRProtoEnt* result);

/***********************************************************************
** FUNCTIONS: PR_ntohs, PR_ntohl, PR_ntohll, PR_htons, PR_htonl, PR_htonll
**
** DESCRIPTION: API entries for the common byte ordering routines.
**
**      PR_ntohs        16 bit conversion from network to host
**      PR_ntohl        32 bit conversion from network to host
**      PR_ntohll       64 bit conversion from network to host
**      PR_htons        16 bit conversion from host to network
**      PR_htonl        32 bit conversion from host to network
**      PR_ntonll       64 bit conversion from host to network
**
***********************************************************************/
NSPR_API(PRUint16) PR_ntohs(PRUint16);
NSPR_API(PRUint32) PR_ntohl(PRUint32);
NSPR_API(PRUint64) PR_ntohll(PRUint64);
NSPR_API(PRUint16) PR_htons(PRUint16);
NSPR_API(PRUint32) PR_htonl(PRUint32);
NSPR_API(PRUint64) PR_htonll(PRUint64);

PR_END_EXTERN_C

#endif /* prnetdb_h___ */