NAME

       CURLMOPT_MAX_HOST_CONNECTIONS - max number of connections to a single host

SYNOPSIS

       #include <curl/curl.h>

       CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_MAX_HOST_CONNECTIONS,
                                   long max);

DESCRIPTION

       Pass  a  long  to  indicate max. The set number will be used as the maximum amount of simultaneously open
       connections to a single host (a host being the same as a host name + port  number  pair).  For  each  new
       session   to   a   host,   libcurl   will   open   a   new   connection   up   to   the   limit   set  by
       CURLMOPT_MAX_HOST_CONNECTIONS(3). When the limit is  reached,  the  sessions  will  be  pending  until  a
       connection  becomes  available. If CURLMOPT_PIPELINING(3) is enabled, libcurl will try to pipeline if the
       host is capable of it.

       The default max value is 0, unlimited.  However, for  backwards  compatibility,  setting  it  to  0  when
       CURLMOPT_PIPELINING(3)  is 1 will not be treated as unlimited. Instead it will open only 1 connection and
       try to pipeline on it.

       This set limit is also used for proxy connections, and then the proxy is considered to be  the  host  for
       which this limit counts.

       When  more  transfers are added to the multi handle than what can be performed due to the set limit, they
       will be queued up waiting for their chance. When that happens, the CURLOPT_TIMEOUT_MS(3) timeout will  be
       counted  inclusive  of  the waiting time, meaning that if you set a too narrow timeout in such a case the
       transfer might never even start before it times out.

       Even in the queued up situation, the CURLOPT_CONNECTTIMEOUT_MS(3) timeout is however treated  as  a  per-
       connect timeout.

DEFAULT

       0

PROTOCOLS

       HTTP(S)

EXAMPLE

       CURLM *m = curl_multi_init();
       /* do no more than 2 connections per host */
       curl_multi_setopt(m, CURLMOPT_MAX_HOST_CONNECTIONS, 2L);

AVAILABILITY

       Added in 7.30.0

RETURN VALUE

       Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.

SEE ALSO

       CURLMOPT_MAXCONNECTS(3), CURLMOPT_MAX_TOTAL_CONNECTIONS(3),