socket_zep: make use of crc16_ccitt_false_update()

[benpicco]

Contribution description

Use crc16_ccitt instead of ucrc16 as it is faster and smaller than the generic CRC16 implementation.

Testing procedure

ZEP can still communicate with an unmodified instance.

Iface  7  HWaddr: 50:3C  Channel: 26  NID: 0x23  PHY: O-QPSK 
          Long HWaddr: E6:DF:AB:47:75:1A:50:3C 
           State: IDLE 
          ACK_REQ  L2-PDU:102  MTU:1280  HL:64  RTR  
          RTR_ADV  6LO  IPHC  
          Source address length: 8
          Link type: wireless
          inet6 addr: fe80::e4df:ab47:751a:503c  scope: link  VAL
          inet6 addr: 2001:db8::e4df:ab47:751a:503c  scope: global  VAL
          inet6 group: ff02::2
          inet6 group: ff02::1
          inet6 group: ff02::1:ff1a:503c
          inet6 group: ff02::1a
          
          Statistics for Layer 2
            RX packets 3  bytes 222
            TX packets 3 (Multicast: 2)  bytes 0
            TX succeeded 3 errors 0
          Statistics for IPv6
            RX packets 2  bytes 224
            TX packets 3 (Multicast: 2)  bytes 210
            TX succeeded 3 errors 0

> ping ff02::1
ping ff02::1
12 bytes from fe80::e8c8:a4b0:2429:4113%7: icmp_seq=0 ttl=64 rssi=0 dBm time=0.682 ms
12 bytes from fe80::e8c8:a4b0:2429:4113%7: icmp_seq=1 ttl=64 rssi=0 dBm time=0.657 ms
12 bytes from fe80::e8c8:a4b0:2429:4113%7: icmp_seq=2 ttl=64 rssi=0 dBm time=0.715 ms

--- ff02::1 PING statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 0.657/0.684/0.715 ms

Issues/PRs references

[riot-ci]

Murdock results

✔️ PASSED

2bb657c socket_zep: make use of crc16_ccitt

Success	Failures	Total	Runtime
1991	0	1991	06m:29s

Artifacts

• Documentation preview

This only reflects a subset of all builds from https://ci-prod.riot-os.org. Please refer to https://ci.riot-os.org for a complete build for now.