NAME¶
CURLOPT_RESOLVE - provide custom host name to IP address resolves
SYNOPSIS¶
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_RESOLVE,
struct curl_slist *hosts);
DESCRIPTION¶
Pass a pointer to a linked list of strings with host name resolve information to
use for requests with this handle. The linked list should be a fully valid
list of
struct curl_slist structs properly filled in. Use
curl_slist_append(3) to create the list and
curl_slist_free_all(3) to clean up an entire list.
Each single name resolve string should be written using the format
HOST:PORT:ADDRESS where HOST is the name libcurl will try to resolve, PORT is
the port number of the service where libcurl wants to connect to the HOST and
ADDRESS is the numerical IP address. If libcurl is built to support IPv6,
ADDRESS can of course be either IPv4 or IPv6 style addressing.
This option effectively pre-populates the DNS cache with entries for the
host+port pair so redirects and everything that operations against the
HOST+PORT will instead use your provided ADDRESS. Addresses to set with
CURL_RESOLVE will not time-out from the DNS cache like ordinary
entries.
You can remove names from the DNS cache again, to stop providing these fake
resolves, by including a string in the linked list that uses the format
"-HOST:PORT". The host name must be prefixed with a dash, and the
host name and port number must exactly match what was already added
previously.
DEFAULT¶
NULL
PROTOCOLS¶
All
EXAMPLE¶
TODO
AVAILABILITY¶
Added in 7.21.3
RETURN VALUE¶
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
SEE ALSO¶
CURLOPT_IPRESOLVE(3),
CURLOPT_DNS_CACHE_TIMEOUT(3),