Restore sndrcv behaviour from before 53afe84 #7187

Job	Run time
pyca/cryptography test	25s
CodeQL analysis	3m 13s
Code health check	1m 20s
Build doc	6m 0s
Type hints check	21s
Check SPDX identifiers	4s
ubuntu-latest 3.7 non_root -K scanner	3m 57s
ubuntu-latest 3.8 non_root -K scanner	4m 5s
ubuntu-latest 3.9 non_root -K scanner	4m 16s
ubuntu-latest 3.10 non_root -K scanner	4m 6s
ubuntu-latest 3.11 non_root -K scanner	3m 50s
ubuntu-latest 3.12 non_root -K scanner	4m 22s
ubuntu-latest 3.12 root -K scanner	5m 23s
ubuntu-latest pypy3.9 root -K scanner	4m 8s
ubuntu-latest libpcap 3.12 root -K scanner	5m 17s
macos-14 3.12 both -K scanner	13m 19s
ubuntu-latest 3.12 root -k scanner	4m 38s
ubuntu-latest pypy3.9 root -k scanner	3m 17s
macos-14 3.12 both -k scanner	1m 41s
	1h 13m 42s

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