sgsnemu: no outgoing GTP-U in "createif" mode

Viktor Tsymbalyuk viktor.tsymbalyuk at gmail.com
Wed Feb 7 15:00:16 UTC 2018


Hello,

I tried to run sgsnemu in "createif" mode - transfer traffic via tun 
interface.
tun interface created and routing too. But there are no outgoing GTP-U 
from test machine. (in my scenario sgsnemu on separated server).
 From gdb it looks, that in cb_tun_ind function ipm->pdp is 0x0, as result
gtp_data_req(gsn, ipm->pdp, pack, len);
not running.
After changes like below, it's start working. Does I correctly 
understood internal logic?


diff --git a/sgsnemu/sgsnemu.c b/sgsnemu/sgsnemu.c
index 630733b..cf4aa44 100644
--- a/sgsnemu/sgsnemu.c
+++ b/sgsnemu/sgsnemu.c
@@ -1462,7 +1462,7 @@ static int create_pdp_conf(struct pdp_t *pdp, void 
*cbp, int cause)
free(forwarding);
}

-       ipset((struct iphash_t *)pdp->peer, &addr);
+       ipset(iph, &addr);

         state = 2;              /* Connected */


If need more test details, please let me know.
-- 
Viktor


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