anchao opened a new pull request, #1308:
URL: https://github.com/apache/incubator-nuttx-apps/pull/1308
## Summary
nshlib/netcmd: add sanity check for netdev
add sanity check for nsh_foreach_netdev() to avoid unnecessary messages
being printed
Signed-off-by: chao an <anc...@xiaomi.com>
## Impact
## Testing
enable CONFIG_NET_MLD, CONFIG_NET_STATISTICS
```
nsh> ls /proc/net
/proc/net:
stat
mld
tcp
route/
eth0
```
Before:
(The message of proc node mld is printed out by ifconfig)
```
nsh> ifconfig
Joins: 0000 Leaves: 0000
Sent Sched Sent
Queries: 0000 0000
Reports:
Ver 1: ---- 0000
Ver 2: 0000 0000
Done: 0000 0000
Received:
Queries:
Gen: 0000
MAS: 0000
MASS: 0000
Ucast: 0000
Bad: 0000
Reports:
Ver 1: 0000
Ver 2: 0000
Done: 0000
eth0 Link encap:Ethernet HWaddr 00:00:00:00:00:00 at RUNNING
inet addr:10.0.0.2 DRaddr:10.0.0.1 Mask:255.255.255.0
inet6 addr: fe80::200:ff:fe00:0/64
inet6 DRaddr: ::/64
IPv4 IPv6 TCP UDP ICMP ICMPv6
Received 0000 0000 0000 0000 0000 0000
Dropped 0000 0000 0000 0000 0000 0000
IPv4 VHL: 0000 Frg: 0000
IPv6 VHL: 0000
Checksum 0000 ---- 0000 0000 ---- ----
TCP ACK: 0000 SYN: 0000
RST: 0000 0000
Type 0000 0000 ---- ---- 0000 0000
Sent 0000 000b 0000 0000 0000 000b
Rexmit ---- ---- 0000 ---- ---- ----
```
after:
```
nsh> ifconfig
eth0 Link encap:Ethernet HWaddr 00:00:00:00:00:00 at RUNNING
inet addr:10.0.0.2 DRaddr:10.0.0.1 Mask:255.255.255.0
inet6 addr: fe80::200:ff:fe00:0/64
inet6 DRaddr: ::/64
IPv4 IPv6 TCP UDP ICMP ICMPv6
Received 0000 0000 0000 0000 0000 0000
Dropped 0000 0000 0000 0000 0000 0000
IPv4 VHL: 0000 Frg: 0000
IPv6 VHL: 0000
Checksum 0000 ---- 0000 0000 ---- ----
TCP ACK: 0000 SYN: 0000
RST: 0000 0000
Type 0000 0000 ---- ---- 0000 0000
Sent 0000 000b 0000 0000 0000 000b
Rexmit ---- ---- 0000 ---- ---- ----
```
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