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 >
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