invalid fd number return when open(2) is used.

[thehajime]

• How to reproduce it
  • with raw socket

sudo NUSEDEV=eno16777736 nuse-eno16777736=192.168.209.39 ./nuse ../nginx-1.6.1/objs/nginx -c >pwd/../nginx-1.6.1/conf/nginx.conf -p ./

• with tap

sudo NUSEDEV=eth1 NUSEVIF=TAP nuse-eth1=192.168.0.2 ./nuse nginx -c pwd/../nginx-1.6.1/conf/nginx.conf -p ./

both are closing socket for VIF, resulting no VIF channel after that (no RX/TX).

[thehajime]

(renamed the issue title)

https://github.com/thehajime/net-next-nuse/blob/nuse/arch/sim/nuse-glue.c#L431

int open (const char *pathname, int flags) { curfd++; return host_open (pathname, flags); }

this should NOT return a 'real' fd number, but pseudo fd num (curfd).

[thehajime]

b21e5a8 is more improved version of the fix to this issue.