net/devif: check the net device before use

[anchao]

Summary

net/devif: check the net device before use

Signed-off-by: chao an anchao@xiaomi.com

Impact

N/A

Testing

tcp/udp test

[masayuki2009]

@anchao

I noticed that the renew command with lm3s6965-ek:discover on QEMU-7.1 does not work with this PR.

nsh> uname -a
NuttX  10.4.0 7fce145b30 Jan 31 2023 20:35:26 arm lm3s6965-ek
nsh> ps
  PID GROUP PRI POLICY   TYPE    NPX STATE    EVENT     SIGMASK   STACK   USED  FILLED COMMAND
    0     0   0 FIFO     Kthread N-- Ready              00000000 001000 000472  47.2%  Idle Task
    1     1 224 RR       Kthread --- Waiting  Semaphore 00000000 001992 000276  13.8%  hpwork 0x20001cd0
    2     2  60 RR       Kthread --- Waiting  Semaphore 00000000 001992 000276  13.8%  lpwork 0x20001ce8
    3     3 100 RR       Task    --- Running            00000000 002000 001160  58.0%  nsh_main
    4     4 100 RR       Task    --- Waiting  Semaphore 00000000 002008 000564  28.0%  telnetd
nsh> ifconfig
eth0	Link encap:Ethernet HWaddr 00:e0:de:ad:be:ef at UP
	inet addr:10.0.0.2 DRaddr:10.0.0.1 Mask:255.255.255.0

             IPv4   TCP   UDP  ICMP
Received     0000  0000  0000  0000
Dropped      0000  0000  0000  0000
  IPv4        VHL: 0000   Frg: 0000
  Checksum   0000  0000  0000  ----
  TCP         ACK: 0000   SYN: 0000
              RST: 0000  0000
  Type       0000  ----  ----  0000
Sent         0000  0000  0000  0000
  Rexmit     ----  0000  ----  ----
nsh> renew eth0
ERROR: dhcpc_request() failed

[anchao]

@anchao

I noticed that the renew command with lm3s6965-ek:discover on QEMU-7.1 does not work with this PR.

Could you please share the qemu command line?

[masayuki2009]

@anchao

Could you please share the qemu command line?

/home/ishikawa/opensource/QEMU/qemu-7.1/build/arm-softmmu/qemu-system-arm -net nic,model=stellaris -net user,hostfwd=tcp::20023-:23,hostfwd=tcp::20021-:21,hostfwd=tcp::25001-:5001 -M lm3s6965evb -kernel ./nuttx -nographic

[anchao]

@anchao

Could you please share the qemu command line?

/home/ishikawa/opensource/QEMU/qemu-7.1/build/arm-softmmu/qemu-system-arm -net nic,model=stellaris -net user,hostfwd=tcp::20023-:23,hostfwd=tcp::20021-:21,hostfwd=tcp::25001-:5001 -M lm3s6965evb -kernel ./nuttx -nographic

@masayuki2009 thank you, please review #8380