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conncache: only allow multiplexing within same multi handle

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Connections that are used for HTTP/1.1 Pipelining or HTTP/2 multiplexing
only get additional transfers added to them if the existing connection
is held by the same multi or easy handle. libcurl does not support doing
HTTP/2 streams in different threads using a shared connection.

Closes #2152
This commit is contained in:
Daniel Stenberg 2017-12-05 08:39:31 +01:00
parent 415b8dff8e
commit ea3a5d07dc
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2 changed files with 14 additions and 2 deletions
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5
lib/url.c
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@ -1264,6 +1264,11 @@ ConnectionExists(struct Curl_easy *data,
already in use so we skip it */
continue;
if((check->inuse) && (check->data->multi != needle->data->multi))
/* this could be subject for pipeline/multiplex use, but only
if they belong to the same multi handle */
continue;
if(needle->localdev || needle->localport) {
/* If we are bound to a specific local end (IP+port), we must not
re-use a random other one, although if we didn't ask for a