개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

CURLOPT_PREREQFUNCTION(3)

CURLOPT_PREREQFUNCTION(3)  curl_easy_setopt options  CURLOPT_PREREQFUNCTION(3)



NAME
       CURLOPT_PREREQFUNCTION  -  user  callback  called when a connection has
       been established, but before a request has been made.

SYNOPSIS
       #include <curl/curl.h>

       /* These are the return codes for the pre-request callback. */
       #define CURL_PREREQFUNC_OK 0
       #define CURL_PREREQFUNC_ABORT 1 /* fail the entire transfer */

       int prereq_callback(void *clientp,
                           char *conn_primary_ip,
                           char *conn_local_ip,
                           int conn_primary_port,
                           int conn_local_port);

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PREREQFUNCTION, prereq_callback);

DESCRIPTION
       Pass a pointer to your callback function, which should match the proto‐
       type shown above.

       This function gets called by libcurl after a connection has been estab‐
       lished or a connection has been reused (including any SSL handshaking),
       but before any request is actually made on the connection. For example,
       for HTTP, this callback is called once a  connection  has  been  estab‐
       lished  to  the server, but before a GET/HEAD/POST/etc request has been
       sent.

       This function may be called multiple times if redirections are  enabled
       and are being followed (see CURLOPT_FOLLOWLOCATION(3)).

       The  callback  function  must  return CURL_PREREQFUNC_OK on success, or
       CURL_PREREQFUNC_ABORT to cause the transfer to fail.

       This function is passed the following arguments:

       conn_primary_ip
              A null-terminated pointer to a C string containing  the  primary
              IP  of  the  remote server established with this connection. For
              FTP, this is the IP for the control connection.  IPv6  addresses
              are represented without surrounding brackets.

       conn_local_ip
              A null-terminated pointer to a C string containing the originat‐
              ing IP for this connection. IPv6 addresses are represented with‐
              out surrounding brackets.

       conn_primary_port
              The  primary  port  number on the remote server established with
              this connection.  For FTP, this is the port for the control con‐
              nection. This can be a TCP or a UDP port number depending on the
              protocol.

       conn_local_port
              The originating port number for this connection. This can  be  a
              TCP or a UDP port number depending on the protocol.

       clientp
              The pointer you set with CURLOPT_PREREQDATA(3).

DEFAULT
       By default, this is NULL and unused.

PROTOCOLS
       ALL

EXAMPLE
       static int prereq_callback(void *clientp,
                                  char *conn_primary_ip,
                                  char *conn_local_ip,
                                  int conn_primary_port,
                                  int conn_local_port)
       {
         printf("Connection made to %s:%s\n", conn_primary_ip, conn_primary_port);
         return CURL_PREREQFUNC_OK;
       }

       {
         struct data prereq_data;
         curl_easy_setopt(CURL *handle, CURLOPT_PREREQFUNCTION, prereq_callback);
         curl_easy_setopt(CURL *handle, CURLOPT_PREREQDATA, &prereq_data);
       }

AVAILABILITY
       Added in 7.80.0

RETURN VALUE
       Returns  CURLE_OK  if the option is supported, and CURLE_UNKNOWN_OPTION
       if not.

SEE ALSO
       CURLOPT_PREREQDATA(3)



libcurl 7.86.0                September 20, 2022     CURLOPT_PREREQFUNCTION(3)