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Current Path: /usr/src/sys/netgraph

📁 ..
📄 NOTES(3.63 KB)
📁 atm
📁 bluetooth
📁 netflow
📄 netgraph.h(41.17 KB)
📄 ng_UI.c(6.29 KB)
📄 ng_UI.h(2.36 KB)
📄 ng_async.c(16.51 KB)
📄 ng_async.h(4.05 KB)
📄 ng_atmllc.c(7.25 KB)
📄 ng_atmllc.h(1.85 KB)
📄 ng_base.c(100.62 KB)
📄 ng_bpf.c(14.66 KB)
📄 ng_bpf.h(3.97 KB)
📄 ng_bridge.c(29.37 KB)
📄 ng_bridge.h(7.58 KB)
📄 ng_car.c(19.62 KB)
📄 ng_car.h(4.6 KB)
📄 ng_checksum.c(15.85 KB)
📄 ng_checksum.h(2.63 KB)
📄 ng_cisco.c(15.47 KB)
📄 ng_cisco.h(3.39 KB)
📄 ng_deflate.c(17.09 KB)
📄 ng_deflate.h(2.85 KB)
📄 ng_device.c(10.65 KB)
📄 ng_device.h(1.74 KB)
📄 ng_echo.c(3.52 KB)
📄 ng_echo.h(2.28 KB)
📄 ng_eiface.c(16.31 KB)
📄 ng_eiface.h(2.09 KB)
📄 ng_etf.c(12.84 KB)
📄 ng_etf.h(3.05 KB)
📄 ng_ether.c(22.26 KB)
📄 ng_ether.h(3.22 KB)
📄 ng_ether_echo.c(4.17 KB)
📄 ng_ether_echo.h(2.32 KB)
📄 ng_frame_relay.c(13.21 KB)
📄 ng_frame_relay.h(2.51 KB)
📄 ng_gif.c(15.86 KB)
📄 ng_gif.h(4.04 KB)
📄 ng_gif_demux.c(10.83 KB)
📄 ng_gif_demux.h(2.05 KB)
📄 ng_hole.c(5.85 KB)
📄 ng_hole.h(2.69 KB)
📄 ng_hub.c(4.33 KB)
📄 ng_hub.h(1.68 KB)
📄 ng_iface.c(19.58 KB)
📄 ng_iface.h(2.68 KB)
📄 ng_ip_input.c(4.97 KB)
📄 ng_ip_input.h(3.78 KB)
📄 ng_ipfw.c(8.29 KB)
📄 ng_ipfw.h(1.54 KB)
📄 ng_ksocket.c(33.9 KB)
📄 ng_ksocket.h(3.86 KB)
📄 ng_l2tp.c(40.16 KB)
📄 ng_l2tp.h(8.12 KB)
📄 ng_lmi.c(28.15 KB)
📄 ng_lmi.h(3.2 KB)
📄 ng_macfilter.c(24.45 KB)
📄 ng_macfilter.h(5.7 KB)
📄 ng_message.h(14.69 KB)
📄 ng_mppc.c(23.88 KB)
📄 ng_mppc.h(3.29 KB)
📄 ng_nat.c(23.43 KB)
📄 ng_nat.h(6.87 KB)
📄 ng_one2many.c(15.88 KB)
📄 ng_one2many.h(4.56 KB)
📄 ng_parse.c(43.85 KB)
📄 ng_parse.h(18.49 KB)
📄 ng_patch.c(15.54 KB)
📄 ng_patch.h(3.64 KB)
📄 ng_pipe.c(26.97 KB)
📄 ng_pipe.h(5.56 KB)
📄 ng_ppp.c(72.27 KB)
📄 ng_ppp.h(9.77 KB)
📄 ng_pppoe.c(58.34 KB)
📄 ng_pppoe.h(9.64 KB)
📄 ng_pptpgre.c(36.05 KB)
📄 ng_pptpgre.h(6.04 KB)
📄 ng_pred1.c(18.02 KB)
📄 ng_pred1.h(2.73 KB)
📄 ng_rfc1490.c(13.33 KB)
📄 ng_rfc1490.h(2.62 KB)
📄 ng_sample.c(15.14 KB)
📄 ng_sample.h(3.53 KB)
📄 ng_socket.c(29.91 KB)
📄 ng_socket.h(2.73 KB)
📄 ng_socketvar.h(2.51 KB)
📄 ng_source.c(21.72 KB)
📄 ng_source.h(4.96 KB)
📄 ng_split.c(4.54 KB)
📄 ng_split.h(1.84 KB)
📄 ng_sppp.c(9.39 KB)
📄 ng_sppp.h(1.03 KB)
📄 ng_tag.c(19.05 KB)
📄 ng_tag.h(4.55 KB)
📄 ng_tcpmss.c(10.63 KB)
📄 ng_tcpmss.h(2.73 KB)
📄 ng_tee.c(10.61 KB)
📄 ng_tee.h(3.51 KB)
📄 ng_tty.c(11.96 KB)
📄 ng_tty.h(2.49 KB)
📄 ng_vjc.c(15.66 KB)
📄 ng_vjc.h(3.5 KB)
📄 ng_vlan.c(17.61 KB)
📄 ng_vlan.h(3.47 KB)

Editing: NOTES

$FreeBSD$
Development ideas..

Archie's suggestions... :-)

- There should be a new malloc type: M_NETGRAPH
	[DONE]
	- all mallocs/frees now changed to use this.. JRE
	- might further split them out some time.

- Use MALLOC and FREE macros instead of direct function calls
	[DONE]
	- They allow conditional compilation which keeps
	  statistics & counters on various memory allocation
	  (or so it seems)
	   - Now tend to have NG_FREE_XX() macros. they
	     allow better debugging

- In struct ng_mesg: at least make "header" into "hdr", if not
   getting rid of it altogether. It doesn't seem necessary and
   makes all my C code lines too long.

- I understand.. one thought however.. consider..
	  if char data[0] were not legal,  so that data[1] needed to be
	  used instead, then the only way to get the size of the header
	  would be sizeof(msg.header) as sizeof(msg) would include the dummy
	  following bytes. this is a portability issue and I hope
	  it will be ported eventually :)

- Baloney! you can use sizeof(msg) - 1 then.. or just
	  make it a macro, then its always portable:

#ifdef __GNU_C__
	    #define NG_MSG_HDR_SIZE	(sizeof(struct ng_message))
	  #else
	    #define NG_MSG_HDR_SIZE	(sizeof(struct ng_message) - 1)
	  #endif

- inertia rules :-b

- Have a user level program to print out and manipulate nodes, etc.
	- [DONE]
		see ngctl, nghook

- "Netgraph global" flags to turn on tracing, etc.

- ngctl needs to be rewritten using libnetgraph. Also it needs a
   command to list all existing nodes (in case you don't know the
   name of what you're looking for).
	[DONE]

- Need a way to get a list of ALL nodes.
	[DONE]
	- see NGM_LISTNODES

- Enhance "netstat" to display all netgraph nodes -- or at least
   all netgraph socket nodes.
	[DONE]

- BUG FIX: bind() on a socket should neither require nor allow a
   colon character at the end of the name. Note ngctl allows you
   to do it either way!
	[DONE] (I think)
	- bind on a control socket has been disabled
	  it was a bad idea.

- Need to implement passing meta information through socket nodes
   using sendmsg() and recvmsg().

- Stuff needing to be added to manual:

- Awareness of SPL level, use ng_queue*() functions when necessary.
   - Malloc all memory with type M_NETGRAPH. -DONE
   - Write code so it can be an LKM or built into the kernel.. this means
     be careful with things like #ifdef INET.
   - All nodes assume that all data mbufs have the M_PKTHDR flag set!
     The ng_send_data() and related functions should have an
     #ifdef DIAGNOSTIC check to check this assumption for every mbuf.
     -DONE with INVARIANTS. Framework should test this more.
   - More generally, netgraph code should make liberal use of the
     #ifdef DIAGNOSTIC definition.
     -INVARIANTS.
   - Since data and messages are sent functionally, programmers need
     to watch out for infinite feedback loops. Should ng_base.c detect
     this automatically?
      - I've been thinking about this. each node could have a 'colour'
	which is set to the colour of the packet as you pass through.
	hitting a node already of your colour would abort. Each packet
	has another (incremented) colour.
	-new 'item' type can hold a hopcount...

NEW in 2001
All piggyback responses have gone away.
use the node ID in the return address field for quick response delivery.

Every node has a queue, plus there is a list of nodes that have queued work.
Extensive use of Mutexes. Getting in shape for SMP.

Messages and data are deliverd in a new form. An Item now has
all information needed to queue such a request and deliver it later, so 
it is now the basis of all data transfer since any transfer may need to
be queued.

003 File Manager

Editing: NOTES

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