Skip to content

Instantly share code, notes, and snippets.

View fcamel's full-sized avatar

fcamel fcamel

71 followers · 0 following
View GitHub Profile
@fcamel
fcamel / tshark_tcp_quickack.txt
Created November 17, 2017 13:30
1 0.000000000 192.168.1.109 → 192.168.1.109 TCP 74 46672 → 8000 [SYN] Seq=0 Win=43690 Len=0 MSS=65495 SACK_PERM=1 TSval=40124281 TSecr=0 WS=128
2 0.000005978 192.168.1.109 → 192.168.1.109 TCP 74 8000 → 46672 [SYN, ACK] Seq=0 Ack=1 Win=43690 Len=0 MSS=65495 SACK_PERM=1 TSval=40124281 TSecr=40124281 WS=128
3 0.000010862 192.168.1.109 → 192.168.1.109 TCP 66 46672 → 8000 [ACK] Seq=1 Ack=1 Win=43776 Len=0 TSval=40124281 TSecr=40124281
4 0.000056512 192.168.1.109 → 192.168.1.109 TCP 76 8000 → 46672 [PSH, ACK] Seq=1 Ack=1 Win=43776 Len=10 TSval=40124281 TSecr=40124281
5 0.000088529 192.168.1.109 → 192.168.1.109 TCP 66 46672 → 8000 [ACK] Seq=1 Ack=11 Win=43776 Len=0 TSval=40124281 TSecr=40124281
6 0.000109539 192.168.1.109 → 192.168.1.109 TCP 1056 8000 → 46672 [PSH, ACK] Seq=11 Ack=1 Win=43776 Len=990 TSval=40124281 TSecr=40124281
7 0.000112096 192.168.1.109 → 192.168.1.109 TCP 66 46672 → 8000 [ACK] Seq=1 Ack=1001 Win=45696 Len=0 TSval=40124281 TSecr=40124281
8 0.000131095 192.168.1.10
@fcamel
fcamel / tshark_tcp_default.txt
Created November 17, 2017 13:24
1 0.000000000 192.168.1.109 → 192.168.1.109 TCP 74 46664 → 8000 [SYN] Seq=0 Win=43690 Len=0 MSS=65495 SACK_PERM=1 TSval=40119763 TSecr=0 WS=128
2 0.000005810 192.168.1.109 → 192.168.1.109 TCP 74 8000 → 46664 [SYN, ACK] Seq=0 Ack=1 Win=43690 Len=0 MSS=65495 SACK_PERM=1 TSval=40119763 TSecr=40119763 WS=128
3 0.197946013 192.168.1.109 → 192.168.1.109 TCP 66 46664 → 8000 [ACK] Seq=1 Ack=1 Win=43776 Len=0 TSval=40119813 TSecr=40119763
4 0.198082252 192.168.1.109 → 192.168.1.109 TCP 76 8000 → 46664 [PSH, ACK] Seq=1 Ack=1 Win=43776 Len=10 TSval=40119813 TSecr=40119813
5 0.198142202 192.168.1.109 → 192.168.1.109 TCP 66 46664 → 8000 [ACK] Seq=1 Ack=11 Win=43776 Len=0 TSval=40119813 TSecr=40119813
6 0.198146792 192.168.1.109 → 192.168.1.109 TCP 1056 8000 → 46664 [PSH, ACK] Seq=11 Ack=1 Win=43776 Len=990 TSval=40119813 TSecr=40119813
7 0.198149046 192.168.1.109 → 192.168.1.109 TCP 66 46664 → 8000 [ACK] Seq=1 Ack=1001 Win=45696 Len=0 TSval=40119813 TSecr=40119813
8 0.198176219 192.168.1.10
@fcamel
fcamel / tcp_test.c
Last active August 17, 2020 11:44
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <arpa/inet.h>
#include <netinet/tcp.h>
#include <unistd.h>
#include <stdbool.h>
#include <stdlib.h>
@fcamel
fcamel / stap_tcp_advertise_mss
Created November 12, 2017 07:08
$ stap -L 'kernel.function("tcp_advertise_mss").return'
$ stap -L 'kernel.function("tcp_advertise_mss").inline'
kernel.function("tcp_advertise_mss@/build/linux-3phnTq/linux-4.4.0/net/ipv4/tcp_output.c:121").inline
$ stap -L 'kernel.statement("tcp_advertise_mss@*:*")'
( No output )
@fcamel
fcamel / stap___tcp_mtu_to_mss
Created November 12, 2017 04:43
$ stap -L 'kernel.statement("__tcp_mtu_to_mss@*:*")'
kernel.statement("__tcp_mtu_to_mss@/build/linux-3phnTq/linux-4.4.0/net/ipv4/tcp_output.c:1302")
kernel.statement("__tcp_mtu_to_mss@/build/linux-3phnTq/linux-4.4.0/net/ipv4/tcp_output.c:1305")
kernel.statement("__tcp_mtu_to_mss@/build/linux-3phnTq/linux-4.4.0/net/ipv4/tcp_output.c:1308")
kernel.statement("__tcp_mtu_to_mss@/build/linux-3phnTq/linux-4.4.0/net/ipv4/tcp_output.c:1309")
kernel.statement("__tcp_mtu_to_mss@/build/linux-3phnTq/linux-4.4.0/net/ipv4/tcp_output.c:1313")
kernel.statement("__tcp_mtu_to_mss@/build/linux-3phnTq/linux-4.4.0/net/ipv4/tcp_output.c:1317")
@fcamel
fcamel / stap_tcp_sync_mss
Created November 12, 2017 04:39
$ stap -L 'kernel.statement("tcp_sync_mss@*:*")'
kernel.statement("tcp_sync_mss@/build/linux-3phnTq/linux-4.4.0/net/ipv4/tcp_output.c:1395") $sk:struct sock* $pmtu:u32
kernel.statement("tcp_sync_mss@/build/linux-3phnTq/linux-4.4.0/net/ipv4/tcp_output.c:1400") $sk:struct sock* $pmtu:u32
kernel.statement("tcp_sync_mss@/build/linux-3phnTq/linux-4.4.0/net/ipv4/tcp_output.c:1401") $sk:struct sock* $pmtu:u32
kernel.statement("tcp_sync_mss@/build/linux-3phnTq/linux-4.4.0/net/ipv4/tcp_output.c:1407") $sk:struct sock* $pmtu:u32
kernel.statement("tcp_sync_mss@/build/linux-3phnTq/linux-4.4.0/net/ipv4/tcp_output.c:1408") $sk:struct sock* $pmtu:u32
kernel.statement("tcp_sync_mss@/build/linux-3phnTq/linux-4.4.0/net/ipv4/tcp_output.c:1409") $_min1:int $sk:struct sock*
kernel.statement("tcp_sync_mss@/build/linux-3phnTq/linux-4.4.0/net/ipv4/tcp_output.c:1410") $sk:struct sock* $pmtu:u32
kernel.statement("tcp_sync_mss@/build/linux-3phnTq/linux-4.4.0/net/ipv4/tcp_output.c:1413") $sk:struct sock* $pmtu:u32
@fcamel
fcamel / fib.s
Created October 7, 2017 08:17
fib(n)
0000000000400ef0 <_Z3fibi>:
long long fib(int n) {
400ef0: b8 01 00 00 00 mov $0x1,%eax
if (n <= 1)
400ef5: 83 ff 02 cmp $0x2,%edi
400ef8: 0f 8c 8f 00 00 00 jl 400f8d <_Z3fibi+0x9d>
long long a = 1;
long long b = 1;
@fcamel
fcamel / redefine_class.rb
Created April 23, 2017 01:26
$ cat a.rb
class A
def foo
return "foo"
end
end
a = A.new
print a.foo(), "\n"
@fcamel
fcamel / redefine_class.py
Created April 23, 2017 01:25
$ cat a.py
class A(object):
def foo(self):
return "foo"
a = A()
print a.foo()
class A(object):
@fcamel
fcamel / ruby_python_class_re_define
Created April 23, 2017 01:25
ruby, python, comparison of redefining class
$ cat a.py
class A(object):
def foo(self):
return "foo"
a = A()
print a.foo()
class A(object):