Hi Jiuyue, I have a use case where my benchmark opens a sockets in simulated OS inside gem5 on port 8080. Now I want to send data to this 8080 port from outside gem5 (from host OS). I have done the following:
I added a serial port com_2. Now I see that port 3456 is opened for com_1 and 3457 for com_2. Then I send data from host OS to gem5 com_2 using port 3457. The log message shows that gem5 receives this data. Inside gem5 then I bind com_2 to port 8080 using the following commands but com_2 doesn't forward anything to port 8080: mknod /dev/ttyS1 c 4 65 socat /dev/ttyS1,raw,echo=0,crnl tcp4-connect:localhost:8080 << binds successfully Is this approach wrong? Regards, On 27 June 2014 13:27, 马久跃 via gem5-users <[email protected]> wrote: > Hi Ahmad, > > 3500 port provided by ethertap is a "virtual ethernet tunnel" (google > TAP/TUN), you can send/recv ethernet packet to/from gem5. > > socat can bind this port to a virtual ethernet device on host os. > > you need to do followings to make this work: > 1) connect Ethernet device to ethertap.tap port using EtherLink, maybe you > have to add "tap" port to py file yourself (see getSlavePort() in > ethertap.cc) > 2) run socat on host os, bind localhost:3500 to tap device (I forgot the > parameter, you may google it), this will create a virtual ethernet device > "tapX" at host os, you can config ip to it as other ethernet device > 3) you also need some modify to send/recv in ethertap cxx source, current > impl send data using a loop which cause checksum failed and packet dropped > at host kernel. I'll post this patch next week. > > Jiuyue > > 在 2014年6月27日，19:02，"Ahmad Hassan" <[email protected]> 写道： > > Hi Jiuyue, > > I added ethertap in FSConfig.py as self.ethertap = EtherTap(). I noticed > that it opens the port 3500 on the local host. What does EtherTap do if I > send the data on port 3500? > > Shall I run socat on simulated OS or the host OS? What socket I should > bind to whom, using socat? > > Thanks. > Regards, > > Best Regards, Hassan > > TIP HANA Cloud Computing, Systems Engineering > > *SAP (UK) Limited *| The Concourse, Queen's Rd, Queen's Island, > Titanic Quarter | BT3 9DT Belfast | UK > > > On 26 June 2014 00:07, 马久跃 via gem5-users <[email protected]> wrote: > >> Hi Ahmad, >> >> you may try ethertap device + socat tool, they can connect gem5 to host >> machine. but you need some modify to ethertap to make it work with socat. >> >> Jiuyue >> >> 在 2014年6月25日，20:58，"Andreas Hansson via gem5-users" <[email protected]> >> 写道： >> >> Hi Ahmad, >> >> There is currently no such functionality in gem5, and networking is >> only supported within one simulator instance. At the moment you can connect >> two systems (as there is no ethernet switch), but on the developer list >> there has been discussions mentioning ongoing work to create an Ethernet >> switch, which would allow more systems (>2) to communicate over Ethernet. >> >> Coming back to your original question, the tricky part with host >> bridging/NATing is the different time scales. The simulated system is >> perhaps 1.000 - 10.000x slower than the host system, and this difference in >> time scale confuses the TCP/IP stack(s). Also, having an external network >> connection will make simulations non-deterministic, which is often >> undesirable. All this said, if you have ideas of how to make it work, >> please feel free to share and discuss on the list. >> >> Andreas >> >> From: Ahmad Hassan via gem5-users <[email protected]> >> Reply-To: Ahmad Hassan <[email protected]>, gem5 users mailing list >> <[email protected]> >> Date: Wednesday, 25 June 2014 04:55 >> To: gem5 users mailing list <[email protected]> >> Subject: [gem5-users] Configure networking in Gem5 X86 FS >> >> Hi, >> >> I have set up eth0 interface in X86 FS mode through e1000 driver. But I >> cannot SSH or ping the the host machine or any other IP or the network. I >> noticed that GEM5 does not create any bridge/NAT on the host machine. >> >> How can I configure networking in gem5 so that I can SSH from any >> machine on the network or the host machine into gem5 X86 FS Ubuntu? >> >> Thanks. >> >> -Ahmad >> >> -- IMPORTANT NOTICE: The contents of this email and any attachments are >> confidential and may also be privileged. If you are not the intended >> recipient, please notify the sender immediately and do not disclose the >> contents to any other person, use it for any purpose, or store or copy the >> information in any medium. Thank you. >> >> ARM Limited, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, >> Registered in England & Wales, Company No: 2557590 >> ARM Holdings plc, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, >> Registered in England & Wales, Company No: 2548782 >> >> _______________________________________________ >> gem5-users mailing list >> [email protected] >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >> >> >> _______________________________________________ >> gem5-users mailing list >> [email protected] >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >> > > > _______________________________________________ > gem5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >
_______________________________________________ gem5-users mailing list [email protected] http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
