wenquan2015 opened a new pull request, #17683:
URL: https://github.com/apache/nuttx/pull/17683
## Summary
According to RFC793, the flags of TCP reply packet should be as follows:
1. `RST` if flags of request packet has `ACK`
2. `RST|ACK` if flags of request packet has no `ACK`, at the same time, the
sequence should be set to zero.
## Impact
tcp reset packet
## Testing
python test codeļ¼
from scapy.all import *
syn_pkt = IP(dst="10.0.1.2")/TCP(
dport=800,
flags="S",
seq= 123456,
ack= 654321
)
# send packet(need root privilege)
send(syn_pkt, verbose=1)
syn_ack_pkt = IP(dst="10.0.1.2")/TCP(
dport=800,
flags="SA",
seq= 123456,
ack= 654321
)
send(syn_ack_pkt, verbose=1)
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