1. IPv4 over 1394
발표자: 오주용
발표일: 2003, 11, 5

2. Contents Introduction Communication Sequence
Link Encapsulation and Fragmentation
Serial Bus Address Resolution Protocol (1394 ARP)
Multicast channel allocation protocol (MCAP)

3. Introduction IETF, Network Working Group
Request for Comments (RFC): 2734
 IPv4 over IEEE 1394
Specifies how to use IEEE1394 Std for the transport of Internet Protocol version 4 (IPv4) datagram.
Link encapsulation and fragmentation
Address resolution protocol (1394ARP)
Multicast channel allocation protocol (MCAP)

4. Module Stack

5. Communication Sequence

6. Ethernet 설정 [root@eth1394T1 root]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:01:39:01:A6:29
inet addr: Bcast: Mask:
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:88318 errors:0 dropped:0 overruns:0 frame:0
TX packets:395 errors:0 dropped:0 overruns:0 carrier:0
collisions:567 txqueuelen:100
RX bytes: (7.8 Mb) TX bytes:35769 (34.9 Kb)
Interrupt:10 Base address:0xd800
eth1 Link encap:Ethernet HWaddr FF:C0:00:00:00:00
inet addr: Bcast: Mask:
UP BROADCAST RUNNING MTU:4088 Metric:1
RX packets:28 errors:0 dropped:0 overruns:0 frame:0
TX packets:28 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:1968 (1.9 Kb) TX bytes:2152 (2.1 Kb)
root]#

7. ARP request packet

8. Request Packet

9. Response Packet

10. Link Encapsulation and Fragmentation
20~64k bytes
20~60 bytes
IP Packet
Header
Data
Fragmentation
Speed
Asyn.
Iso.
Variable payload by the speed
S100
512
1024
S200
1024
2048
1394 packet
Header
Data
S400
2048
4096
S800
4096
8192
S1600
8192
16384
S3200
16384
32768

11. Encapsulation header
규정된 크기 이상의 packet이 상위계층으로부터 전달될 때 Link Fragmentation을 수행 lf
reserved
ether_type
0x0800
IPv4
0x0806
1394 ARP
0x8861
MCAP
Datagram_size: the encoded size of the entire IP datagram
Ether_type:
Fragment_offset: 이전에 전송된 fragment data size (0 ~ )
Dgl: the value of dgl (datagram label), 특정 IP datagram 이 fragment된 경우 그 fragment된 모든 패킷은 같은 label을 가진다.
Reception Node는 source ID와 dgl을 이용해서 각 fragment packet을 구분하고 IP datagram으로 복구한다.
버스 리셋이 일어나는 경우 보내는 측과 받는 측은, 보내고 있거나 받고 있는 모든 fragment들을 discard 시킨다.
Unfragmented 1
First 2
Last 3
Interior lf
rsv
datagram_size
ether_type
dgl
reserved lf
rsv
datagram_size
rsv fragment_offset
dgl
reserved

12. Serial Bus Address Resolution Protocol (1394 ARP) Packet format
Hardware_type(0x0018)
Protocol_type(0x0800)
Hw_addr_len
IP_addr_len
Opcode
Sender_unique_ID
Sender_max_rec
Sspd
Sender_unique_ID_hi
Sender_unicast_FIFO_lo
Sender_IP_address
Target_IP_address
Hardware_type: this field indicates 1394 and shall have a value of 0x0018
Protocol_type: 0x0800
Hw_addr_len: 1394-dependent hardware address length
IP_addr_len: this field indicates the size, in octets, of an IP version 4 address, may it have a value of 4.
Opcode: 1394 ARP request -> 1 response -> 2
Sender_unique_ID: the node unique ID of the sender (sender’s bus information block)
Sender_max_rec: max_rec in the sender’s configuration ROM bus information block
Maximum_data_record_size 최대 보낼수 있는 playload에 관련된 항목
Sspd: s100->0 s200->1 s400->2 (sender 측의 link 및 PHY 스피트)
Sender_unicast_FIFO_hi and sender_unicast_FIFO_lo:
48-bit offset of the sender’s FIFO available for the receipt of IP datagrams in the format specified by section 6
The offst of a sender’s unicast FIFO shall not change, except as the result of a power reset
Sender_IP_address
Target_IP_address

13. IP Unicast, Broadcast, Multicast
Asynchronous Block write
전달확인 보장, 전달지연은 고려할 필요가 없는 경우
Isochronous transfer mode
실시간 동작, QoS가 요구되는 경우
IP Broadcast, Multicast
Asynchronous stream packets
Channel number used for IP broadcast is specified by the BROADCAST_CHANNEL register

14. Multicast Channel Allocation Protocol (MCAP)
A method for multicast groups to coordinate their use of serial bus resources (channel)
Encapsulated by GASP (Global Asynchronous Stream Packet)
Multicast channel owner / recipient
Advertise/Solicit message
When more than one source transmits MCAP advertisements for the same channel number, the source with the largest physical ID is the owner
Ether_type: 0x8861
Multicast IP: ~