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8 Commits

Author SHA1 Message Date
Eyal Soha 3d3bf9603d Use hex.Dump for Layer.String() of byte slices. 
PiperOrigin-RevId: 306726587
 2020-04-15 14:59:15 -07:00
Eyal Soha 1bcc2bf17f Refactor connections.go to make it easier to add new connection types. 
Rather than have a struct for the state of each type of connection, such as
TCP/IPv4, UDP/IPv4, TCP/IPv6, etc, have a state for each layer, such as UDP,
TCP, IPv4, IPv6.  Those states can be composed into connections.

Tested:
  Existing unit tests still pass/fail as expected.
PiperOrigin-RevId: 306703180
 2020-04-15 13:01:11 -07:00
Eyal Soha ef0b5584e5 Refactor parser to use a for loop instead of recursion. 
This makes the code shorter and less repetitive.

TESTED:
  All unit tests still pass.
PiperOrigin-RevId: 306161475
 2020-04-12 18:33:23 -07:00
Eyal Soha 2020349468 Improve error messages when parsing headers. 
Tested:
  Looked at output of failing tests.
PiperOrigin-RevId: 306031407
 2020-04-11 06:46:27 -07:00
gVisor bot 21e438d257 Dereference pointers in Layer's Stringer impl 
Dereference any fields which are pointers before string formatting so that the
value pointed to ends up in the string representation.

Tested:
  Added TestLayerStringFormat to
  //third_party/gvisor/test/packetimpact/testbench:testbench_test
PiperOrigin-RevId: 305627821
 2020-04-08 23:30:09 -07:00
Eyal Soha 7482902364 Implement Stringer for Layer 
Tested:
  Sample output for printing 3 different Layer structs:

  &testbench.Ether{SrcAddr:02:42:c4:77:5d:14 DstAddr:02:42:c4:77:5d:0a}
  &testbench.IPv4{SrcAddr:196.119.93.20 DstAddr:224.0.0.1}
  &testbench.UDP{SrcPort:0xc00033b260 DstPort:0xc00033b280}

  Sample output for printing a Layers struct (word-wrapped):
  [&testbench.Ether{SrcAddr:02:42:c4:77:5d:14 DstAddr:02:42:c4:77:5d:0a}
   &testbench.IPv4{SrcAddr:196.119.93.20 DstAddr:224.0.0.1}
   &testbench.UDP{SrcPort:0xc00033b260 DstPort:0xc00033b280}
   &testbench.Payload{Bytes:[104 101 108 108 111 32 119 111 114 108 100]}]

PiperOrigin-RevId: 305014376
 2020-04-06 06:25:24 -07:00
Eyal Soha d25036ad17 Test receiving multicast packets over UDP 
PiperOrigin-RevId: 304098611
 2020-03-31 19:53:11 -07:00
Eyal Soha 3192e55ffe Packetimpact in Go with c++ stub 
PiperOrigin-RevId: 301382690
 2020-03-17 08:53:27 -07:00