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OPT_LENGTH 0x00 - Option's Length
pgm_opt_header
pgm_opt_length
first option, always present.
--------------------------------------------------------------------------------
OPT_FRAGMENT 0x01 - Fragmentation
pgm_opt_header
pgm_opt_fragment
may be present for odata, rdata. 'MAY' exist for others, although a bit strange.
--------------------------------------------------------------------------------
OPT_NAK_LIST 0x02 - List of NAK entries
pgm_opt_header
pgm_opt_nak_list
may be present for naks.
--------------------------------------------------------------------------------
OPT_JOIN 0x03 - Late Joining
pgm_opt_header
pgm_opt_join
may be present for odata, rdata, spm.
requires SPM to learn NLA already so not overly useful with odata/rdata, could be
used with video streaming to last i-frame data sequence number.
--------------------------------------------------------------------------------
OPT_REDIRECT 0x07 - Redirect
pgm_opt_header
pgm_opt_redirect
pgm_opt_redirect6
should be present for polrs from a dlr.
--------------------------------------------------------------------------------
OPT_SYN 0x0D - Synchronization
pgm_opt_header
pgm_opt_syn
must only appear with odata or rdata.
--------------------------------------------------------------------------------
OPT_FIN 0x0E - Session Fin receivers, conventional
feedbackish
pgm_opt_header
opt_opt_fin
may be present for odata, rdata, must appear in following spms.
--------------------------------------------------------------------------------
OPT_RST 0x0F - Session Reset
pgm_opt_header
pgm_opt_rst
must only appear in spms. not many 'unrecoverable error conditions' exist though.
--------------------------------------------------------------------------------
OPT_PARITY
must appear in odata or rdata to indicate pro-active or on-demand parity data,
nak to request parity repair data, ncf to confirm parity nak.
OPT_VAR_PKTLEN
may be present in odata or data to indicate variable size packets.
OPT_PARITY_PRM 0x08 - Forward Error Correction Parameters
pgm_opt_header
pgm_opt_parity_prm
appended to spms to inform of pro-active or on-demand parity.
--------------------------------------------------------------------------------
OPT_PARITY_GRP 0x09 - Forward Error Correction Group Number
pgm_opt_parity_grp
appended to odata and rdata parity packets.
--------------------------------------------------------------------------------
OPT_CURR_TGSIZE 0x0A - Forward Error Correction Group Size
pgm_opt_curr_tgsize
must appear in last odata or rdata packet of variable transmission group, may
appear in spms.
--------------------------------------------------------------------------------
OPT_CR 0x10 - Congestion Report
pgm_opt_header
pgm_opt_cr
--------------------------------------------------------------------------------
OPT_CRQST 0x11 - Congestion Report Request
pgm_opt_header
pgm_opt_crqst
--------------------------------------------------------------------------------
OPT_NAK_BO_IVL 0x04 - NAK Back-Off Interval
pgm_opt_header
pgm_opt_nak_bo_ivl
--------------------------------------------------------------------------------
OPT_NAK_BO_RNG 0x05 - NAK Back-Off Range
pgm_opt_header
pgm_opt_nak_bo_rng
--------------------------------------------------------------------------------
OPT_NBR_UNREACH 0x0B - Neighbor Unreachable
pgm_opt_header
pgm_opt_nbr_unreach
--------------------------------------------------------------------------------
OPT_PATH_NLA 0x0C - Path NLA
pgm_opt_header
pgm_opt_path_nla
pgm_opt6_path_nla
--------------------------------------------------------------------------------
OPT_INVALID 0x7F - Option invalidated
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