Month: December 2004

After Christmas~

wellsgz

圣诞过后,最大的感觉就系,想继续训觉.

冷空气好似应节甘,忽然系圣诞的前夕来到,出街会发觉,寻日的全城夏装而家已经个个都着到密密实实.我觉得身上厚厚的衫除左可以御寒,还可以带来一些,情感上的温暖.就像我眷恋早上温暖的被窝一样,被紧紧包围的感觉总系比较令人觉得安全.

安全,这个世界越来越缺乏安全好似,寻日印尼海底地震.8.9级,哇,真系好鬼劲,然后引发海啸,周围的国家都受到影响.除左要惊恐怖袭击,仲要惊自然的裁决.其实,真系整定呢好似,没得避的,吾知道终点的旅程才最叫人向往,我们都不舍得错过沿路的每一个风光.

圣诞那日,排左半个钟头队,去睇<<功夫>>.好耐都未见过有甘多人排队买电影票啦,好似储蓄已久的购买力忽然迸发,么野都忽然吾使钱甘.讲返功夫,其实都真系几得,有斧头帮的Tap Dance Show,有包租婆的睡衣,包租公的唇印,仲有如来伸掌,威晒.可惜出戏就短少少,感觉好似未够甘.

未够,真系未够训…

IP Option numbers

wellsgz

IP OPTION NUMBERS

(last updated 2001-06-29)

The Internet Protocol (IP) has provision for optional header fields
identified by an option type field.  Options 0 and 1 are exactly one
octet which is their type field.  All other options have their one
octet type field, followed by a one octet length field, followed by
length-2 octets of option data.  The option type field is sub-divided
into a one bit copied flag, a two bit class field, and a five bit
option number.  These taken together form an eight bit value for the
option type field.  IP options are commonly refered to by this value.

Copy Class Number Value Name Reference
—- —– —— —– ——————————- ———
   0     0      0     0 EOOL   – End of Options List    [RFC791,JBP]
   0     0      1     1 NOP    – No Operation           [RFC791,JBP]
   1     0      2   130 SEC    – Security                  [RFC1108]
   1     0      3   131 LSR    – Loose Source Route     [RFC791,JBP]
   0     2      4    68 TS     – Time Stamp             [RFC791,JBP]
   1     0      5   133 E-SEC  – Extended Security         [RFC1108]
   1     0      6   134 CIPSO  – Commercial Security           [???]
   0     0      7     7 RR     – Record Route           [RFC791,JBP]
   1     0      8   136 SID    – Stream ID              [RFC791,JBP]
   1     0      9   137 SSR    – Strict Source Route    [RFC791,JBP]
   0     0     10    10 ZSU    – Experimental Measurement      [ZSu]
   0     0     11    11 MTUP   – MTU Probe                 [RFC1191]*
   0     0     12    12 MTUR   – MTU Reply                 [RFC1191]*
   1     2     13   205 FINN   – Experimental Flow Control    [Finn]
   1     0     14   142 VISA   – Expermental Access Control [Estrin]
   0     0     15    15 ENCODE – ???                      [VerSteeg]
   1     0     16   144 IMITD  – IMI Traffic Descriptor        [Lee]
   1     0     17   145 EIP    – Extended Internet Protocol[RFC1385]
   0     2     18    82 TR     – Traceroute    [RFC1393]
   1     0     19   147 ADDEXT – Address Extension    [Ullmann IPv7]
   1     0     20   148 RTRALT – Router Alert              [RFC2113]
   1     0     21   149 SDB    – Selective Directed Broadcast[Graff]
   1     0     22   150 NSAPA  – NSAP Addresses          [Carpenter]
   1 0     23   151 DPS    – Dynamic Packet State        [Malis]
   1 0     24   152 UMP    – Upstream Multicast Pkt. [Farinacci]

[Note, an asterisk (*) denotes an obsoleted IP Option Number.]