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6715cbf97f
qc_snd_buf returned a size_t which means that it was never negative despite its documentation. Thus the caller who checked for this was never informed of a sendto error. Clean this by changing the return value of qc_snd_buf() to an integer. A 0 is returned on success. Every other values are considered as an error. This commit should be backported up to 2.6. Note that to not cause malfunctions, it must be backported after the previous patch : 906b0589546b700b532472ede019e5c5a8ac1f38 MINOR: quic: explicitely ignore sendto error This is to ensure that a sendto error does not cause send to be interrupted which may cause a stalled transfer without a proper retry mechanism. The impact of this bug seems null as caller explicitely ignores sendto error. However this part of code seems to be subject to strange issues and it may fix them in part. It may be of interest for github issue #1808.