Thanks GOOGLE for making this the #1 page in searching "rpcinfo clnt_create"
Let's jump into the details of RPC!
RPC Key Facts
- rpcbind daemon listens at 111
- /etc/rpc has the program number for rpc programs.
- rpcbind table is maintained - starting the service will update the table.
- rpcinfo -p to see rpcbind table
- uses program number instead of well-known ports
- clients send program number asking for ports
- rpc server check program number against /etc/rpc to know the service
- rpcbind check rpcbind table to get port.
- if service isn't started, no entry in rpcbind table - rpcinfo -p returns nothing
- start service will register port inside rpcbind table
- unregister service by 'rpcinfo -d service' ver command
Background Information
Network Ports
Two different approaches to port assignments
1)Central Authority
- www.iana.org
- well known ports
- /etc/services lists all the well-known services
lrwxrwxrwx /etc/services -> ./inet/services
Central Authority
telnet example:
inetd listens at port 23.
- client sends telnet request
- inetd detects the request and assign different port back to client
- client talks to server on the given port
- inetd keeps listening at port 23 for new telnet request.
Features of RPC
Dynamic Binding - RPC
- client doesn't know the port #
- hosts assign port dynamically
- sun created RPCs
- sun hard code the program number
- service not listed in /etc/services but program# in /etc/rpc
- when start a service, it record its port in rpcbind table, rpcinfo -p to see
- client requests by program# to rpcbind and rpcbind checks prg# and rpcbind table,
then returns port to client
- the rest communication is just like 1).
-------------
Hands-on Examples 1:
host1 spray host2
host1 spray sends (dest port#:111, source Port#,program# 100012) ---> rpcbind @port 111 on host2
host2: rpcbind reads host1 packets' program# 100012 and checks rpcbind table for
(proto,port,service).
on Host2:
1. host2 check program# with /etc/rpc file and knows this is spray.
rpc program number - 100012 for spray (consults /etc/rpc file, records rpc prog#)
2. host2 rpcbind checks program# against rpcbind table - rpcbind table is generated
during the boot by rpcbind. It has the format of:
program#, port#,service
100012,32760,spray
To list current rpcbind table , use 'rpcinfo -p' command
'rpcinfo -p' shows:
- program number
- version number of the RPC program number
- RPC protocol
- port number
- RPC service
#rpcinfo -p hostname ; get rpcbind table from remote host
#rpcinfo -p ; get rpcbind table from local host
program vers proto port service
100000 4 tcp 111 rpcbind
100000 3 tcp 111 rpcbind
100000 2 tcp 111 rpcbind
100000 4 udp 111 rpcbind
100000 3 udp 111 rpcbind
100000 2 udp 111 rpcbind
100024 1 udp 32802 status
100012 1 udp 33563 sprayd
......
3. host2 sends back the port number (33563) for spray back to the client.
4. the client sends another request with the correct port number for spray to host2.
5. host2 inetd receives the requests (by listening at spray's port) and rpc.sprayd
takes over the communcation.
#rpcinfo -d 100012 1 ; unregisters the RPC service with prog#100012
#svcadm disable svc:/network/rpc/spray:udp
#svcadm enable svc:/network/rpc/spray:udp
To start spray services
#svcadm enable svc:/network/rpc/spray:default
---------------------
Hands-on Examples 2:
ksh:gulf1# svcadm enable svc:/network/rpc/spray:default
ksh:gulf1# grep rpcbind /etc/services
sunrpc 111/udp rpcbind
sunrpc 111/tcp rpcbind
ksh:gulf1# rpcinfo -p | grep spray ;spray started,rpcbind has it
100012 1 udp 33563 sprayd
ksh:gulf1# grep gray /etc/services ;not listed as well-known port
ksh:gulf1# grep sprayd /etc/rpc ;check prog#
sprayd 100012 spray
ksh:gulf1# spray hotel1
spray: cannot clnt_create hotel1:netpath: RPC: Program not registered
Start spray on hotel1 server.
ksh:gulf1# spray hotel1
sending 1162 packets of length 86 to hotel1 ...
no packets dropped by hotel1
25270 packets/sec, 2173285 bytes/sec
unregister 'spray - rpcinfo -d spray 1'
ksh:hotel1#rpcinfo -d spray 1
ksh:gulf1# spray hotel1
spray: cannot clnt_create hotel1:netpath: RPC: Program not registered
Restart spray
ksh:gulf1# svcadm disable svc:/network/rpc/spray:default
ksh:gulf1# svcadm enable svc:/network/rpc/spray:default
Confirm spray is listed in rpcbind
ksh:gulf1# rpcinfo -p hotel1 | grep spray
100012 1 udp 32949 sprayd
ksh:gulf1# spray hotel1
sending 1162 packets of length 86 to hotel1 ...
no packets dropped by hotel1
28799 packets/sec, 2476752 bytes/sec
==============
Below is a tcpdump capture of detailed "rpcinfo -p" query between a Linux host and a Sun Solaris server.
ETHER: ----- Ether Header -----
ETHER:
ETHER: Packet 1 arrived at 22:24:53.67045
ETHER: Packet size = 74 bytes
ETHER: Destination = 0:c:29:2e:ed:c1,
ETHER: Source = 0:c:29:e5:d:fb,
ETHER: Ethertype = 0800 (IP)
ETHER:
IP: ----- IP Header -----
IP:
IP: Version = 4
IP: Header length = 20 bytes
IP: Type of service = 0x00
IP: xxx. .... = 0 (precedence)
IP: ...0 .... = normal delay
IP: .... 0... = normal throughput
IP: .... .0.. = normal reliability
IP: .... ..0. = not ECN capable transport
IP: .... ...0 = no ECN congestion experienced
IP: Total length = 60 bytes
IP: Identification = 5703
IP: Flags = 0x4
IP: .1.. .... = do not fragment
IP: ..0. .... = last fragment
IP: Fragment offset = 0 bytes
IP: Time to live = 64 seconds/hops
IP: Protocol = 6 (TCP)
IP: Header checksum = a058
IP: Source address = 192.168.1.104, ipc4.shanjing.com
IP: Destination address = 192.168.1.100, sun1.shanjing.com
IP: No options
IP:
TCP: ----- TCP Header -----
TCP:
TCP: Source port = 750
TCP: Destination port = 111
TCP: Sequence number = 3368322776
TCP: Acknowledgement number = 0
TCP: Data offset = 40 bytes
TCP: Flags = 0x02
TCP: 0... .... = No ECN congestion window reduced
TCP: .0.. .... = No ECN echo
TCP: ..0. .... = No urgent pointer
TCP: ...0 .... = No acknowledgement
TCP: .... 0... = No push
TCP: .... .0.. = No reset
TCP: .... ..1. = Syn
TCP: .... ...0 = No Fin
TCP: Window = 5840
TCP: Checksum = 0xc95d
TCP: Urgent pointer = 0
TCP: Options: (20 bytes)
TCP: - Maximum segment size = 1460 bytes
TCP: - SACK permitted option
TCP: - TS Val = 2134176, TS Echo = 0
TCP: - No operation
TCP: - Window scale = 2
TCP:
ETHER: ----- Ether Header -----
ETHER:
ETHER: Packet 2 arrived at 22:24:53.67077
ETHER: Packet size = 78 bytes
ETHER: Destination = 0:c:29:e5:d:fb,
ETHER: Source = 0:c:29:2e:ed:c1,
ETHER: Ethertype = 0800 (IP)
ETHER:
IP: ----- IP Header -----
IP:
IP: Version = 4
IP: Header length = 20 bytes
IP: Type of service = 0x00
IP: xxx. .... = 0 (precedence)
IP: ...0 .... = normal delay
IP: .... 0... = normal throughput
IP: .... .0.. = normal reliability
IP: .... ..0. = not ECN capable transport
IP: .... ...0 = no ECN congestion experienced
IP: Total length = 64 bytes
IP: Identification = 27277
IP: Flags = 0x4
IP: .1.. .... = do not fragment
IP: ..0. .... = last fragment
IP: Fragment offset = 0 bytes
IP: Time to live = 64 seconds/hops
IP: Protocol = 6 (TCP)
IP: Header checksum = 4c0e
IP: Source address = 192.168.1.100, sun1.shanjing.com
IP: Destination address = 192.168.1.104, ipc4.shanjing.com
IP: No options
IP:
TCP: ----- TCP Header -----
TCP:
TCP: Source port = 111
TCP: Destination port = 750
TCP: Sequence number = 1322806787
TCP: Acknowledgement number = 3368322777
TCP: Data offset = 44 bytes
TCP: Flags = 0x12
TCP: 0... .... = No ECN congestion window reduced
TCP: .0.. .... = No ECN echo
TCP: ..0. .... = No urgent pointer
TCP: ...1 .... = Acknowledgement
TCP: .... 0... = No push
TCP: .... .0.. = No reset
TCP: .... ..1. = Syn
TCP: .... ...0 = No Fin
TCP: Window = 49232
TCP: Checksum = 0xeedf
TCP: Urgent pointer = 0
TCP: Options: (24 bytes)
TCP: - No operation
TCP: - No operation
TCP: - TS Val = 1532405, TS Echo = 2134176
TCP: - Maximum segment size = 1460 bytes
TCP: - No operation
TCP: - Window scale = 0
TCP: - No operation
TCP: - No operation
TCP: - SACK permitted option
TCP:
ETHER: ----- Ether Header -----
ETHER:
ETHER: Packet 3 arrived at 22:24:53.67082
ETHER: Packet size = 66 bytes
ETHER: Destination = 0:c:29:2e:ed:c1,
ETHER: Source = 0:c:29:e5:d:fb,
ETHER: Ethertype = 0800 (IP)
ETHER:
IP: ----- IP Header -----
IP:
IP: Version = 4
IP: Header length = 20 bytes
IP: Type of service = 0x00
IP: xxx. .... = 0 (precedence)
IP: ...0 .... = normal delay
IP: .... 0... = normal throughput
IP: .... .0.. = normal reliability
IP: .... ..0. = not ECN capable transport
IP: .... ...0 = no ECN congestion experienced
IP: Total length = 52 bytes
IP: Identification = 5705
IP: Flags = 0x4
IP: .1.. .... = do not fragment
IP: ..0. .... = last fragment
IP: Fragment offset = 0 bytes
IP: Time to live = 64 seconds/hops
IP: Protocol = 6 (TCP)
IP: Header checksum = a05e
IP: Source address = 192.168.1.104, ipc4.shanjing.com
IP: Destination address = 192.168.1.100, sun1.shanjing.com
IP: No options
IP:
TCP: ----- TCP Header -----
TCP:
TCP: Source port = 750
TCP: Destination port = 111
TCP: Sequence number = 3368322777
TCP: Acknowledgement number = 1322806788
TCP: Data offset = 32 bytes
TCP: Flags = 0x10
TCP: 0... .... = No ECN congestion window reduced
TCP: .0.. .... = No ECN echo
TCP: ..0. .... = No urgent pointer
TCP: ...1 .... = Acknowledgement
TCP: .... 0... = No push
TCP: .... .0.. = No reset
TCP: .... ..0. = No Syn
TCP: .... ...0 = No Fin
TCP: Window = 1460
TCP: Checksum = 0xea46
TCP: Urgent pointer = 0
TCP: Options: (12 bytes)
TCP: - No operation
TCP: - No operation
TCP: - TS Val = 2134177, TS Echo = 1532405
TCP:
ETHER: ----- Ether Header -----
ETHER:
ETHER: Packet 4 arrived at 22:24:53.67095
ETHER: Packet size = 110 bytes
ETHER: Destination = 0:c:29:2e:ed:c1,
ETHER: Source = 0:c:29:e5:d:fb,
ETHER: Ethertype = 0800 (IP)
ETHER:
IP: ----- IP Header -----
IP:
IP: Version = 4
IP: Header length = 20 bytes
IP: Type of service = 0x00
IP: xxx. .... = 0 (precedence)
IP: ...0 .... = normal delay
IP: .... 0... = normal throughput
IP: .... .0.. = normal reliability
IP: .... ..0. = not ECN capable transport
IP: .... ...0 = no ECN congestion experienced
IP: Total length = 96 bytes
IP: Identification = 5707
IP: Flags = 0x4
IP: .1.. .... = do not fragment
IP: ..0. .... = last fragment
IP: Fragment offset = 0 bytes
IP: Time to live = 64 seconds/hops
IP: Protocol = 6 (TCP)
IP: Header checksum = a030
IP: Source address = 192.168.1.104, ipc4.shanjing.com
IP: Destination address = 192.168.1.100, sun1.shanjing.com
IP: No options
IP:
TCP: ----- TCP Header -----
TCP:
TCP: Source port = 750
TCP: Destination port = 111 (Sun RPC)
TCP: Sequence number = 3368322777
TCP: Acknowledgement number = 1322806788
TCP: Data offset = 32 bytes
TCP: Flags = 0x18
TCP: 0... .... = No ECN congestion window reduced
TCP: .0.. .... = No ECN echo
TCP: ..0. .... = No urgent pointer
TCP: ...1 .... = Acknowledgement
TCP: .... 1... = Push
TCP: .... .0.. = No reset
TCP: .... ..0. = No Syn
TCP: .... ...0 = No Fin
TCP: Window = 1460
TCP: Checksum = 0xe454
TCP: Urgent pointer = 0
TCP: Options: (12 bytes)
TCP: - No operation
TCP: - No operation
TCP: - TS Val = 2134177, TS Echo = 1532405
TCP:
RPC: ----- SUN RPC Header -----
RPC:
RPC: Record Mark: last fragment, length = 40
RPC: Transaction id = 450618384
RPC: Type = 0 (Call)
RPC: RPC version = 2
RPC: Program = 100000 (PMAP), version = 2, procedure = 4
RPC: Credentials: Flavor = 0 (None), len = 0 bytes
RPC: Verifier : Flavor = 0 (None), len = 0 bytes
RPC:
PMAP: ----- Portmapper -----
PMAP:
PMAP: Proc = 4 (Dump the mappings)
PMAP:
ETHER: ----- Ether Header -----
ETHER:
ETHER: Packet 5 arrived at 22:24:53.67117
ETHER: Packet size = 66 bytes
ETHER: Destination = 0:c:29:e5:d:fb,
ETHER: Source = 0:c:29:2e:ed:c1,
ETHER: Ethertype = 0800 (IP)
ETHER:
IP: ----- IP Header -----
IP:
IP: Version = 4
IP: Header length = 20 bytes
IP: Type of service = 0x00
IP: xxx. .... = 0 (precedence)
IP: ...0 .... = normal delay
IP: .... 0... = normal throughput
IP: .... .0.. = normal reliability
IP: .... ..0. = not ECN capable transport
IP: .... ...0 = no ECN congestion experienced
IP: Total length = 52 bytes
IP: Identification = 27278
IP: Flags = 0x4
IP: .1.. .... = do not fragment
IP: ..0. .... = last fragment
IP: Fragment offset = 0 bytes
IP: Time to live = 64 seconds/hops
IP: Protocol = 6 (TCP)
IP: Header checksum = 4c19
IP: Source address = 192.168.1.100, sun1.shanjing.com
IP: Destination address = 192.168.1.104, ipc4.shanjing.com
IP: No options
IP:
TCP: ----- TCP Header -----
TCP:
TCP: Source port = 111
TCP: Destination port = 750
TCP: Sequence number = 1322806788
TCP: Acknowledgement number = 3368322821
TCP: Data offset = 32 bytes
TCP: Flags = 0x10
TCP: 0... .... = No ECN congestion window reduced
TCP: .0.. .... = No ECN echo
TCP: ..0. .... = No urgent pointer
TCP: ...1 .... = Acknowledgement
TCP: .... 0... = No push
TCP: .... .0.. = No reset
TCP: .... ..0. = No Syn
TCP: .... ...0 = No Fin
TCP: Window = 49188
TCP: Checksum = 0x2faa
TCP: Urgent pointer = 0
TCP: Options: (12 bytes)
TCP: - No operation
TCP: - No operation
TCP: - TS Val = 1532405, TS Echo = 2134177
TCP:
ETHER: ----- Ether Header -----
ETHER:
ETHER: Packet 6 arrived at 22:24:53.67211
ETHER: Packet size = 66 bytes
ETHER: Destination = 0:c:29:2e:ed:c1,
ETHER: Source = 0:c:29:e5:d:fb,
ETHER: Ethertype = 0800 (IP)
ETHER:
IP: ----- IP Header -----
IP:
IP: Version = 4
IP: Header length = 20 bytes
IP: Type of service = 0x00
IP: xxx. .... = 0 (precedence)
IP: ...0 .... = normal delay
IP: .... 0... = normal throughput
IP: .... .0.. = normal reliability
IP: .... ..0. = not ECN capable transport
IP: .... ...0 = no ECN congestion experienced
IP: Total length = 52 bytes
IP: Identification = 5709
IP: Flags = 0x4
IP: .1.. .... = do not fragment
IP: ..0. .... = last fragment
IP: Fragment offset = 0 bytes
IP: Time to live = 64 seconds/hops
IP: Protocol = 6 (TCP)
IP: Header checksum = a05a
IP: Source address = 192.168.1.104, ipc4.shanjing.com
IP: Destination address = 192.168.1.100, sun1.shanjing.com
IP: No options
IP:
TCP: ----- TCP Header -----
TCP:
TCP: Source port = 750
TCP: Destination port = 111
TCP: Sequence number = 3368322821
TCP: Acknowledgement number = 1322807580
TCP: Data offset = 32 bytes
TCP: Flags = 0x10
TCP: 0... .... = No ECN congestion window reduced
TCP: .0.. .... = No ECN echo
TCP: ..0. .... = No urgent pointer
TCP: ...1 .... = Acknowledgement
TCP: .... 0... = No push
TCP: .... .0.. = No reset
TCP: .... ..0. = No Syn
TCP: .... ...0 = No Fin
TCP: Window = 1856
TCP: Checksum = 0xe574
TCP: Urgent pointer = 0
TCP: Options: (12 bytes)
TCP: - No operation
TCP: - No operation
TCP: - TS Val = 2134179, TS Echo = 1532405
TCP:
ETHER: ----- Ether Header -----
ETHER:
ETHER: Packet 7 arrived at 22:24:53.67212
ETHER: Packet size = 858 bytes
ETHER: Destination = 0:c:29:e5:d:fb,
ETHER: Source = 0:c:29:2e:ed:c1,
ETHER: Ethertype = 0800 (IP)
ETHER:
IP: ----- IP Header -----
IP:
IP: Version = 4
IP: Header length = 20 bytes
IP: Type of service = 0x00
IP: xxx. .... = 0 (precedence)
IP: ...0 .... = normal delay
IP: .... 0... = normal throughput
IP: .... .0.. = normal reliability
IP: .... ..0. = not ECN capable transport
IP: .... ...0 = no ECN congestion experienced
IP: Total length = 844 bytes
IP: Identification = 27279
IP: Flags = 0x4
IP: .1.. .... = do not fragment
IP: ..0. .... = last fragment
IP: Fragment offset = 0 bytes
IP: Time to live = 64 seconds/hops
IP: Protocol = 6 (TCP)
IP: Header checksum = 4900
IP: Source address = 192.168.1.100, sun1.shanjing.com
IP: Destination address = 192.168.1.104, ipc4.shanjing.com
IP: No options
IP:
TCP: ----- TCP Header -----
TCP:
TCP: Source port = 111
TCP: Destination port = 750 (Sun RPC)
TCP: Sequence number = 1322806788
TCP: Acknowledgement number = 3368322821
TCP: Data offset = 32 bytes
TCP: Flags = 0x18
TCP: 0... .... = No ECN congestion window reduced
TCP: .0.. .... = No ECN echo
TCP: ..0. .... = No urgent pointer
TCP: ...1 .... = Acknowledgement
TCP: .... 1... = Push
TCP: .... .0.. = No reset
TCP: .... ..0. = No Syn
TCP: .... ...0 = No Fin
TCP: Window = 49232
TCP: Checksum = 0xf9c4
TCP: Urgent pointer = 0
TCP: Options: (12 bytes)
TCP: - No operation
TCP: - No operation
TCP: - TS Val = 1532405, TS Echo = 2134177
TCP:
RPC: ----- SUN RPC Header -----
RPC:
RPC: Record Mark: last fragment, length = 788
RPC: Transaction id = 450618384
RPC: Type = 1 (Reply)
RPC: This is a reply to frame 4
RPC: Status = 0 (Accepted)
RPC: Verifier : Flavor = 0 (None), len = 0 bytes
RPC: Accept status = 0 (Success)
RPC:
PMAP: ----- Portmapper -----
PMAP:
PMAP: Proc = 4 (Dump the mappings)
PMAP: Program Version Protocol Port
PMAP: 100000 4 6 111 PMAP
PMAP: 100000 3 6 111 PMAP
PMAP: 100000 2 6 111 PMAP
PMAP: 100000 4 17 111 PMAP
PMAP: 100000 3 17 111 PMAP
PMAP: 100000 2 17 111 PMAP
PMAP: 100024 1 17 32772 STATMON2
PMAP: 100024 1 6 32771 STATMON2
PMAP: 100133 1 17 32772 ?
PMAP: 100133 1 6 32771 ?
PMAP: 1073741824 1 6 32772 transient
PMAP: 100021 1 17 4045 NLM
PMAP: 100021 2 17 4045 NLM
PMAP: 100021 3 17 4045 NLM
PMAP: 100021 4 17 4045 NLM
PMAP: 100021 1 6 4045 NLM
PMAP: 100021 2 6 4045 NLM
PMAP: 100021 3 6 4045 NLM
PMAP: 100021 4 6 4045 NLM
PMAP: 100001 2 17 32773 RSTAT
PMAP: 100001 3 17 32773 RSTAT
PMAP: 100001 4 17 32773 RSTAT
PMAP: 100068 2 17 32774 CMSD
PMAP: 100068 3 17 32774 CMSD
PMAP: 100068 4 17 32774 CMSD
PMAP: 100068 5 17 32774 CMSD
PMAP: 100083 1 6 32775 ?
PMAP: 100002 2 6 32776 RUSERS
PMAP: 100002 3 6 32776 RUSERS
PMAP: 100002 2 17 32775 RUSERS
PMAP: 100002 3 17 32775 RUSERS
PMAP: 100011 1 17 32776 RQUOTA
PMAP: 300598 1 17 32779 ?
PMAP: 300598 1 6 32777 ?
PMAP: 805306368 1 17 32779 ?
PMAP: 805306368 1 6 32777 ?
PMAP: 100249 1 17 32780 ?
PMAP: 100249 1 6 32778 ?
PMAP: 38 maps
PMAP:
ETHER: ----- Ether Header -----
ETHER:
ETHER: Packet 8 arrived at 22:24:53.68476
ETHER: Packet size = 66 bytes
ETHER: Destination = 0:c:29:2e:ed:c1,
ETHER: Source = 0:c:29:e5:d:fb,
ETHER: Ethertype = 0800 (IP)
ETHER:
IP: ----- IP Header -----
IP:
IP: Version = 4
IP: Header length = 20 bytes
IP: Type of service = 0x00
IP: xxx. .... = 0 (precedence)
IP: ...0 .... = normal delay
IP: .... 0... = normal throughput
IP: .... .0.. = normal reliability
IP: .... ..0. = not ECN capable transport
IP: .... ...0 = no ECN congestion experienced
IP: Total length = 52 bytes
IP: Identification = 5711
IP: Flags = 0x4
IP: .1.. .... = do not fragment
IP: ..0. .... = last fragment
IP: Fragment offset = 0 bytes
IP: Time to live = 64 seconds/hops
IP: Protocol = 6 (TCP)
IP: Header checksum = a058
IP: Source address = 192.168.1.104, ipc4.shanjing.com
IP: Destination address = 192.168.1.100, sun1.shanjing.com
IP: No options
IP:
TCP: ----- TCP Header -----
TCP:
TCP: Source port = 750
TCP: Destination port = 111
TCP: Sequence number = 3368322821
TCP: Acknowledgement number = 1322807580
TCP: Data offset = 32 bytes
TCP: Flags = 0x11
TCP: 0... .... = No ECN congestion window reduced
TCP: .0.. .... = No ECN echo
TCP: ..0. .... = No urgent pointer
TCP: ...1 .... = Acknowledgement
TCP: .... 0... = No push
TCP: .... .0.. = No reset
TCP: .... ..0. = No Syn
TCP: .... ...1 = Fin
TCP: Window = 1856
TCP: Checksum = 0xe562
TCP: Urgent pointer = 0
TCP: Options: (12 bytes)
TCP: - No operation
TCP: - No operation
TCP: - TS Val = 2134196, TS Echo = 1532405
TCP:
ETHER: ----- Ether Header -----
ETHER:
ETHER: Packet 9 arrived at 22:24:53.68489
ETHER: Packet size = 66 bytes
ETHER: Destination = 0:c:29:e5:d:fb,
ETHER: Source = 0:c:29:2e:ed:c1,
ETHER: Ethertype = 0800 (IP)
ETHER:
IP: ----- IP Header -----
IP:
IP: Version = 4
IP: Header length = 20 bytes
IP: Type of service = 0x00
IP: xxx. .... = 0 (precedence)
IP: ...0 .... = normal delay
IP: .... 0... = normal throughput
IP: .... .0.. = normal reliability
IP: .... ..0. = not ECN capable transport
IP: .... ...0 = no ECN congestion experienced
IP: Total length = 52 bytes
IP: Identification = 27280
IP: Flags = 0x4
IP: .1.. .... = do not fragment
IP: ..0. .... = last fragment
IP: Fragment offset = 0 bytes
IP: Time to live = 64 seconds/hops
IP: Protocol = 6 (TCP)
IP: Header checksum = 4c17
IP: Source address = 192.168.1.100, sun1.shanjing.com
IP: Destination address = 192.168.1.104, ipc4.shanjing.com
IP: No options
IP:
TCP: ----- TCP Header -----
TCP:
TCP: Source port = 111
TCP: Destination port = 750
TCP: Sequence number = 1322807580
TCP: Acknowledgement number = 3368322822
TCP: Data offset = 32 bytes
TCP: Flags = 0x10
TCP: 0... .... = No ECN congestion window reduced
TCP: .0.. .... = No ECN echo
TCP: ..0. .... = No urgent pointer
TCP: ...1 .... = Acknowledgement
TCP: .... 0... = No push
TCP: .... .0.. = No reset
TCP: .... ..0. = No Syn
TCP: .... ...0 = No Fin
TCP: Window = 49232
TCP: Checksum = 0x2c51
TCP: Urgent pointer = 0
TCP: Options: (12 bytes)
TCP: - No operation
TCP: - No operation
TCP: - TS Val = 1532406, TS Echo = 2134196
TCP:
ETHER: ----- Ether Header -----
ETHER:
ETHER: Packet 10 arrived at 22:24:53.68522
ETHER: Packet size = 66 bytes
ETHER: Destination = 0:c:29:e5:d:fb,
ETHER: Source = 0:c:29:2e:ed:c1,
ETHER: Ethertype = 0800 (IP)
ETHER:
IP: ----- IP Header -----
IP:
IP: Version = 4
IP: Header length = 20 bytes
IP: Type of service = 0x00
IP: xxx. .... = 0 (precedence)
IP: ...0 .... = normal delay
IP: .... 0... = normal throughput
IP: .... .0.. = normal reliability
IP: .... ..0. = not ECN capable transport
IP: .... ...0 = no ECN congestion experienced
IP: Total length = 52 bytes
IP: Identification = 27281
IP: Flags = 0x4
IP: .1.. .... = do not fragment
IP: ..0. .... = last fragment
IP: Fragment offset = 0 bytes
IP: Time to live = 64 seconds/hops
IP: Protocol = 6 (TCP)
IP: Header checksum = 4c16
IP: Source address = 192.168.1.100, sun1.shanjing.com
IP: Destination address = 192.168.1.104, ipc4.shanjing.com
IP: No options
IP:
TCP: ----- TCP Header -----
TCP:
TCP: Source port = 111
TCP: Destination port = 750
TCP: Sequence number = 1322807580
TCP: Acknowledgement number = 3368322822
TCP: Data offset = 32 bytes
TCP: Flags = 0x11
TCP: 0... .... = No ECN congestion window reduced
TCP: .0.. .... = No ECN echo
TCP: ..0. .... = No urgent pointer
TCP: ...1 .... = Acknowledgement
TCP: .... 0... = No push
TCP: .... .0.. = No reset
TCP: .... ..0. = No Syn
TCP: .... ...1 = Fin
TCP: Window = 49232
TCP: Checksum = 0x2c50
TCP: Urgent pointer = 0
TCP: Options: (12 bytes)
TCP: - No operation
TCP: - No operation
TCP: - TS Val = 1532406, TS Echo = 2134196
TCP:
ETHER: ----- Ether Header -----
ETHER:
ETHER: Packet 11 arrived at 22:24:53.68535
ETHER: Packet size = 66 bytes
ETHER: Destination = 0:c:29:2e:ed:c1,
ETHER: Source = 0:c:29:e5:d:fb,
ETHER: Ethertype = 0800 (IP)
ETHER:
IP: ----- IP Header -----
IP:
IP: Version = 4
IP: Header length = 20 bytes
IP: Type of service = 0x00
IP: xxx. .... = 0 (precedence)
IP: ...0 .... = normal delay
IP: .... 0... = normal throughput
IP: .... .0.. = normal reliability
IP: .... ..0. = not ECN capable transport
IP: .... ...0 = no ECN congestion experienced
IP: Total length = 52 bytes
IP: Identification = 2
IP: Flags = 0x4
IP: .1.. .... = do not fragment
IP: ..0. .... = last fragment
IP: Fragment offset = 0 bytes
IP: Time to live = 64 seconds/hops
IP: Protocol = 6 (TCP)
IP: Header checksum = b6a5
IP: Source address = 192.168.1.104, ipc4.shanjing.com
IP: Destination address = 192.168.1.100, sun1.shanjing.com
IP: No options
IP:
TCP: ----- TCP Header -----
TCP:
TCP: Source port = 750
TCP: Destination port = 111
TCP: Sequence number = 3368322822
TCP: Acknowledgement number = 1322807581
TCP: Data offset = 32 bytes
TCP: Flags = 0x10
TCP: 0... .... = No ECN congestion window reduced
TCP: .0.. .... = No ECN echo
TCP: ..0. .... = No urgent pointer
TCP: ...1 .... = Acknowledgement
TCP: .... 0... = No push
TCP: .... .0.. = No reset
TCP: .... ..0. = No Syn
TCP: .... ...0 = No Fin
TCP: Window = 1856
TCP: Checksum = 0xe55e
TCP: Urgent pointer = 0
TCP: Options: (12 bytes)
TCP: - No operation
TCP: - No operation
TCP: - TS Val = 2134198, TS Echo = 1532406
TCP:
