Refine client recv

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 50.00000% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 94.23%. Comparing base (a4575e4) to head (4321be7).

Additional details and impacted files

[](https://app.codecov.io/gh/redboltz/async_mqtt/pull/281?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Takatoshi+Kondo) ```diff @@ Coverage Diff @@ ## main #281 +/- ## ======================================= Coverage 94.23% 94.23% ======================================= Files 123 123 Lines 8891 8884 -7 ======================================= - Hits 8378 8372 -6 + Misses 513 512 -1 ``` | [Files](https://app.codecov.io/gh/redboltz/async_mqtt/pull/281?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Takatoshi+Kondo) | Coverage Δ | | |---|---|---| | [include/async\_mqtt/client.hpp](https://app.codecov.io/gh/redboltz/async_mqtt/pull/281?src=pr&el=tree&filepath=include%2Fasync_mqtt%2Fclient.hpp&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Takatoshi+Kondo#diff-aW5jbHVkZS9hc3luY19tcXR0L2NsaWVudC5ocHA=) | `100.00% <ø> (ø)` | | | [include/async\_mqtt/impl/client\_impl.hpp](https://app.codecov.io/gh/redboltz/async_mqtt/pull/281?src=pr&el=tree&filepath=include%2Fasync_mqtt%2Fimpl%2Fclient_impl.hpp&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Takatoshi+Kondo#diff-aW5jbHVkZS9hc3luY19tcXR0L2ltcGwvY2xpZW50X2ltcGwuaHBw) | `93.22% <50.00%> (+0.42%)` | :arrow_up: |