mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
48 lines
2.5 KiB
Plaintext
48 lines
2.5 KiB
Plaintext
This document describes the interfaces /proc/net/tcp and /proc/net/tcp6.
|
|
|
|
These /proc interfaces provide information about currently active TCP
|
|
connections, and are implemented by tcp_get_info() in net/ipv4/tcp_ipv4.c and
|
|
tcp6_get_info() in net/ipv6/tcp_ipv6.c, respectively.
|
|
|
|
It will first list all listening TCP sockets, and next list all established
|
|
TCP connections. A typical entry of /proc/net/tcp would look like this (split
|
|
up into 3 parts because of the length of the line):
|
|
|
|
46: 010310AC:9C4C 030310AC:1770 01
|
|
| | | | | |--> connection state
|
|
| | | | |------> remote TCP port number
|
|
| | | |-------------> remote IPv4 address
|
|
| | |--------------------> local TCP port number
|
|
| |---------------------------> local IPv4 address
|
|
|----------------------------------> number of entry
|
|
|
|
00000150:00000000 01:00000019 00000000
|
|
| | | | |--> number of unrecovered RTO timeouts
|
|
| | | |----------> number of jiffies until timer expires
|
|
| | |----------------> timer_active (see below)
|
|
| |----------------------> receive-queue
|
|
|-------------------------------> transmit-queue
|
|
|
|
1000 0 54165785 4 cd1e6040 25 4 27 3 -1
|
|
| | | | | | | | | |--> slow start size threshold,
|
|
| | | | | | | | | or -1 if the treshold
|
|
| | | | | | | | | is >= 0xFFFF
|
|
| | | | | | | | |----> sending congestion window
|
|
| | | | | | | |-------> (ack.quick<<1)|ack.pingpong
|
|
| | | | | | |---------> Predicted tick of soft clock
|
|
| | | | | | (delayed ACK control data)
|
|
| | | | | |------------> retransmit timeout
|
|
| | | | |------------------> location of socket in memory
|
|
| | | |-----------------------> socket reference count
|
|
| | |-----------------------------> inode
|
|
| |----------------------------------> unanswered 0-window probes
|
|
|---------------------------------------------> uid
|
|
|
|
timer_active:
|
|
0 no timer is pending
|
|
1 retransmit-timer is pending
|
|
2 another timer (e.g. delayed ack or keepalive) is pending
|
|
3 this is a socket in TIME_WAIT state. Not all fields will contain
|
|
data (or even exist)
|
|
4 zero window probe timer is pending
|