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/* nbdkit
* Copyright Red Hat
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of Red Hat nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef NBDKIT_CURLDEFS_H
#define NBDKIT_CURLDEFS_H
#include <stdbool.h>
#include <pthread.h>
#ifdef HAVE_STDATOMIC_H
#include <stdatomic.h>
#else
/* Some old platforms lack atomic types, but 32 bit ints are usually
* "atomic enough".
*/
#define _Atomic /**/
#endif
#include "windows-compat.h"
/* Macro CURL_AT_LEAST_VERSION was added in 2015 (Curl 7.43) so if the
* macro isn't present then Curl is very old.
*/
#ifdef CURL_AT_LEAST_VERSION
#if CURL_AT_LEAST_VERSION (7, 30, 0)
#define HAVE_CURLMOPT_MAX_TOTAL_CONNECTIONS
#endif
#if CURL_AT_LEAST_VERSION (7, 52, 0)
#define HAVE_CURLOPT_PROXY_CAINFO
#define HAVE_CURLOPT_PROXY_CAPATH
#endif
#if CURL_AT_LEAST_VERSION (7, 55, 0)
#define HAVE_CURLINFO_CONTENT_LENGTH_DOWNLOAD_T
#endif
#if CURL_AT_LEAST_VERSION (7, 61, 0)
#define HAVE_CURLINFO_NAMELOOKUP_TIME_T
#define HAVE_CURLINFO_CONNECT_TIME_T
#define HAVE_CURLINFO_APPCONNECT_TIME_T
#define HAVE_CURLINFO_PRETRANSFER_TIME_T
#define HAVE_CURLINFO_STARTTRANSFER_TIME_T
#define HAVE_CURLINFO_TOTAL_TIME_T
#define HAVE_CURLINFO_REDIRECT_TIME_T
#endif
#if CURL_AT_LEAST_VERSION (7, 66, 0)
#define HAVE_CURL_MULTI_POLL
#endif
#if CURL_AT_LEAST_VERSION (8, 2, 0)
#define HAVE_CURLINFO_CONN_ID
#define HAVE_CURLINFO_XFER_ID
#endif
#endif
extern const char *url;
extern unsigned connections;
extern const char *cookie_script;
extern unsigned cookie_script_renew;
extern const char *header_script;
extern unsigned header_script_renew;
extern int curl_debug_verbose;
/* The per-connection handle. */
struct handle {
int readonly;
};
/* The libcurl handle and some associated fields and buffers. */
struct curl_handle {
/* The underlying curl handle. */
CURL *c;
char errbuf[CURL_ERROR_SIZE];
/* Before doing a read or write operation, set these to point to the
* buffer where you want the data to be stored / come from. Note
* the confusing terminology from libcurl: write_* is used when
* reading, read_* is used when writing.
*/
char *write_buf;
uint32_t write_count;
const char *read_buf;
uint32_t read_count;
/* This field is used by curl_get_size. */
bool accept_range;
/* Used by scripts.c */
struct curl_slist *headers_copy;
/* Used by worker thread in worker.c */
struct command *cmd;
};
/* Asynchronous commands that can be sent to the worker thread. */
enum command_type { EASY_HANDLE, STOP };
struct command {
/* These fields are set by the caller. */
enum command_type type; /* command */
struct curl_handle *ch; /* for EASY_HANDLE, the easy handle */
/* This field is set to a unique value by send_command_and_wait. */
uint64_t id; /* serial number */
/* These fields are used to signal back that the command finished. */
pthread_mutex_t mutex; /* completion mutex */
pthread_cond_t cond; /* completion condition */
CURLcode status; /* status code (CURLE_OK = succeeded) */
};
/* config.c */
extern int curl_config (const char *key, const char *value);
extern int curl_config_complete (void);
extern const char *curl_config_help;
extern void config_unload (void);
extern void curl_dump_plugin (void);
extern struct curl_handle *allocate_handle (void);
extern void free_handle (struct curl_handle *);
/* worker.c */
extern int worker_get_ready (void);
extern int worker_after_fork (void);
extern void worker_unload (void);
extern CURLcode send_command_to_worker_and_wait (struct command *cmd);
/* scripts.c */
extern int do_scripts (struct curl_handle *ch);
extern void scripts_unload (void);
/* times.c */
extern void update_times (CURL *c); /* called after every curl_easy_perform */
extern void display_times (void);
/* Translate CURLcode to nbdkit_error. */
#define display_curl_error(ch, r, fs, ...) \
do { \
nbdkit_error ((fs ": %s: %s"), ## __VA_ARGS__, \
curl_easy_strerror ((r)), (ch)->errbuf); \
} while (0)
#endif /* NBDKIT_CURLDEFS_H */
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