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rtcppacket(3) [debian man page]

RTCP compound packets manipulation.(3)			     Library Functions Manual			    RTCP compound packets manipulation.(3)

NAME

       RTCP compound packets manipulation. -

   Classes
       class RTCPCompoundHandler
	   low level structs and RTCP packet parsing and building methods.
       class RTCPReceiverInfo
	   Report block information of SR/RR RTCP reports.
       class RTCPSenderInfo
	   Sender block information of SR RTCP reports.

   Enumerations
       enum SDESItemType { SDESItemTypeEND =  0, SDESItemTypeCNAME, SDESItemTypeNAME, SDESItemTypeEMAIL, SDESItemTypePHONE, SDESItemTypeLOC,
	   SDESItemTypeTOOL, SDESItemTypeNOTE, SDESItemTypePRIV, SDESItemTypeH323CADDR, SDESItemTypeLast =  SDESItemTypeH323CADDR }
	   SDES items that may be carried in a Source DEScription RTCP packet.

   Functions
       timeval NTP2Timeval (uint32 msw, uint32 lsw)
	   Convert a NTP timestamp, expressed as two 32-bit long words, into a timeval value.
       uint32 timevalIntervalTo65536 (timeval &t)
	   Convert a time interval, expressed as a timeval, into a 32-bit time interval expressed in units of 1/65536 seconds.

Detailed Description
Enumeration Type Documentation
   enum SDESItemType
       SDES items that may be carried in a Source DEScription RTCP packet. CNAME is mandatory in each RTCP compound packet (except when split for
       partial encryption), the others are optional and have different sending frequencies, though with recommended default values.

       Enumerator:

       SDESItemTypeEND
	      END of SDES item list.

       SDESItemTypeCNAME
	      Canonical end-point identifier.

       SDESItemTypeNAME
	      Personal NAME of the user.

       SDESItemTypeEMAIL
	      EMAIL address of the user.

       SDESItemTypePHONE
	      Phone number of the user.

       SDESItemTypeLOC
	      Location where the user is.

       SDESItemTypeTOOL
	      Application or tool.

       SDESItemTypeNOTE
	      Comment usually reporting state.

       SDESItemTypePRIV
	      Private extension.

       SDESItemTypeH323CADDR
	      H323 callable address.

       SDESItemTypeLast
	      Last defined code.

Function Documentation
   timeval NTP2Timeval (uint32msw, uint32lsw)
       Convert a NTP timestamp, expressed as two 32-bit long words, into a timeval value. Parameters:
	   msw Integer part of NTP timestamp.
	   lsw Fractional part of NTP timestamp.

       Returns:
	   timeval value corresponding to the given NTP timestamp.

   uint32 timevalIntervalTo65536 (timeval &t)
       Convert a time interval, expressed as a timeval, into a 32-bit time interval expressed in units of 1/65536 seconds. Parameters:
	   t Timeval interval.

       Returns:
	   32-bit value corresponding to the given timeval interval.

Author
       Generated automatically by Doxygen for ccRTP from the source code.

ccRTP								  Sat Jun 23 2012			    RTCP compound packets manipulation.(3)

Check Out this Related Man Page

ntp_gettime(2)							System Calls Manual						    ntp_gettime(2)

NAME

       ntp_gettime - Gets the date, time, and kernel time error values.

SYNOPSIS

       #include <sys/timex.h>

       int ntp_gettime (struct ntptimeval *tp);

PARAMETERS

       Points to the ntptimeval structure in which information is returned.  The ntptimeval structure is described in the sys/timex.h header file.

DESCRIPTION

       The ntp_gettime() system call returns three read-only values in the ntptimeval structure.  The ntptimeval structure members are as follows:
       The current system time expressed as a Unix timeval structure.  The timeval structure consists of two 32-bit words: the first is the number
       of  seconds  past  1 January 1970 assuming no intervening leap-second insertions or deletions; and the second is the number of microseconds
       within the second.  The value of the time_maxerror kernel variable, which represents the maximum error of the indicated	time  relative	to
       the  primary synchronization source, in microseconds.  For NTP, the value is initialized to the synchronization distance, which is equal to
       the root dispersion plus one-half the root delay.  It is increased by a small amount (time_tolerance) each second to  reflect  the  maximum
       clock  frequency  error.  This variable is modified by the kernel, but is otherwise not used by the kernel.  The value of the time_esterror
       kernel variable, which represents the expected error of the indicated time relative to the primary synchronization source, in microseconds.
       For  NTP,  the value is determined as the root dispersion, which represents the best estimate of the actual error of the system clock based
       on its past behavior, together with observations of multiple clocks within the peer group.  This variable is not used by the kernel.

RETURN VALUES

       Upon successful completion, a value of 0 (zero) is returned.  Otherwise, a value of -1 is returned and errno is set to indicate the error.

ERRORS

       If the ntp_gettime() function fails, errno may be set to one of the following values: The tp parameter points to a location outside of  the
       allocated address space of the process.	The kernel was configured without the NTP_TIME option.	delim off

																    ntp_gettime(2)
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