vpn - Android VpnService with multiple addresses and routes? -


i'm working on android version of app connect software defined networks. native code behind supports connecting multiple virtual networks @ time, , i'm adapting android's vpnservice.

since android limits single vpn interface, call vpnservice.builder.addaddress() , vpnservice.builder.addroute() once each virtual network, call establish(). once establish() called, can ping android device on each of assigned addresses other devices on 2 virtual networks, can routing 1 of virtual networks within android os.

is possible using vpnservice.builder assign multiple addresses , routes tun interface?

update: jun 15, 2015

things appear getting configured correctly. looking around in logs , via adb shell, have tun0 , tun0:1

# ifconfig tun0 tun0: ip 10.248.13.87 mask 255.255.240.0 flags [up point-to-point running] # ifconfig tun0:1 tun0:1: ip 29.182.13.87 mask 254.0.0.0 flags [up point-to-point running]

and both tun entries in routing table

iface   destination     gateway         flags   refcnt  use     metric  mask            mtu     window  irtt  eth0    00000000        0202000a        0003    0       0       0       00000000        0       0   0  eth0    0002000a        00000000        0001    0       0       0       00ffffff        0       0   0  tun0    0000f80a        00000000        0001    0       0       0       00f0ffff        0       0   0  tun0    0000001c        00000000        0001    0       0       0       000000fe        0       0   0

however 1 of 2 routes accessible. here's ping 2 hosts on other end of vpn connection:

ping -c 4 10.248.4.247 ping 10.248.4.247 (10.248.4.247) 56(84) bytes of data. 64 bytes 10.248.4.247: icmp_seq=1 ttl=128 time=126 ms 64 bytes 10.248.4.247: icmp_seq=2 ttl=128 time=93.5 ms 64 bytes 10.248.4.247: icmp_seq=3 ttl=128 time=73.5 ms 64 bytes 10.248.4.247: icmp_seq=4 ttl=128 time=53.4 ms  --- 10.248.4.247 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3029ms rtt min/avg/max/mdev = 53.492/86.826/126.702/27.026 ms root@generic_x86:/proc/net # ping -c 4 29.95.148.247 ping -c 4 29.95.148.247 ping 29.95.148.247 (29.95.148.247) 56(84) bytes of data.  --- 29.95.148.247 ping statistics --- 4 packets transmitted, 0 received, 100% packet loss, time 3013ms

it appears i've run bug in android.

after digging through tcpdump logs on both ends of connection, found packets routed tun0:1 have source ip in ip header set ip address of tun0.

after writing code replace source ip , checksum in ip packets, icmp pings work. i'll need same tcp , udp packets.


Comments

Post a Comment

Popular posts from this blog

c# - Validate object ID from GET to POST -

i have method allows user access comment have made on site. have post method lets them update comment. my normal solution send entire comment model through, let them update it, update on database when post back. involve sending commentid through in hiddenfor , can manipulated. how can verify commentid sent in get method same i'm getting in post , not able alter comment wish? how can verify commentid sent in method same i'm getting in post? basically have validate following things in post - user logged-in user. authenticated users post comments. commentid in post , should valid commentid , should present in database. userid associated logged-in user should same userid associated comment . comment should contain userid column, can check @ time of update. to make sure update happens comment has been sent in get - hold commentid in session , in post action compare commentid value in session .
Read more

node.js - Custom Model Validator SailsJS -

when using custom model validator checks record within model. return within spread doesn't seem end control flow. //post.js model /** * custom validator **/ types: { isuservalid: function(user_id) { var promise = require('bluebird'); promise.all([ user.findone({id: user_id}) ]) .spread(function(user) { console.log(user); if (user === null || user === undefined) { console.log('failed'); return false; }else{ console.log('passed'); return true; } }); } }, my response standard validation failed response. { "error": "e_validation", "status": 400, "summary": "1 attribute invalid", "model": "post", "invalidattributes": { "owner": [ { "rule": "isuservalid", ...
Read more

php - Find a regex to take part of Email -

i have following emails need extract part from: bestellnummer xxx: 1 von xxx, 1er pack ------------- anfang der nachricht ------------- foo bar baz foo bar baz // <<<<< need text here ------------- ende der nachricht ------------- ------------- anfang der nachricht ------------- foo bar baz foo bar baz ------------- ende der nachricht ------------- there 0 unlimited occurences of ------------- anfang der nachricht ------------- ------------- ende der nachricht ------------- and i'm able extract first part regex: $re = "/------------- .*? -------------.?(.*?).?------------- .*? -------------/s"; but, i'm quite new on learning regex, i'm pretty sure there must better regex extract part (foo bar baz foo bar baz) of text between ------------- anfang der nachricht ------------- ------------- ende der nachricht ------------- as can in different languages, i'm using .? to match between hyphens. i...
Read more