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Code Issues Releases Wiki Activity
7e72b9b547
curl/lib/easy.c
Daniel Stenberg 9d7281ff17
global_init: debug builds allocates a byte in init 
... to make build tools/valgrind warn if no curl_global_cleanup is
called.

This is conditionally only done for debug builds with the env variable
CURL_GLOBAL_INIT set.

Closes #6410
2021-01-06 15:13:45 +01:00

1251 lines
33 KiB
C
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "curl_setup.h"
/*
* See comment in curl_memory.h for the explanation of this sanity check.
*/
#ifdef CURLX_NO_MEMORY_CALLBACKS
#error "libcurl shall not ever be built with CURLX_NO_MEMORY_CALLBACKS defined"
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#include "urldata.h"
#include <curl/curl.h>
#include "transfer.h"
#include "vtls/vtls.h"
#include "url.h"
#include "getinfo.h"
#include "hostip.h"
#include "share.h"
#include "strdup.h"
#include "progress.h"
#include "easyif.h"
#include "multiif.h"
#include "select.h"
#include "sendf.h" /* for failf function prototype */
#include "connect.h" /* for Curl_getconnectinfo */
#include "slist.h"
#include "mime.h"
#include "amigaos.h"
#include "non-ascii.h"
#include "warnless.h"
#include "multiif.h"
#include "sigpipe.h"
#include "vssh/ssh.h"
#include "setopt.h"
#include "http_digest.h"
#include "system_win32.h"
#include "http2.h"
#include "dynbuf.h"
#include "altsvc.h"
#include "hsts.h"
/* The last 3 #include files should be in this order */
#include "curl_printf.h"
#include "curl_memory.h"
#include "memdebug.h"
/* true globals -- for curl_global_init() and curl_global_cleanup() */
static unsigned int initialized;
static long init_flags;
/*
* strdup (and other memory functions) is redefined in complicated
* ways, but at this point it must be defined as the system-supplied strdup
* so the callback pointer is initialized correctly.
*/
#if defined(_WIN32_WCE)
#define system_strdup _strdup
#elif !defined(HAVE_STRDUP)
#define system_strdup curlx_strdup
#else
#define system_strdup strdup
#endif
#if defined(_MSC_VER) && defined(_DLL) && !defined(__POCC__)
# pragma warning(disable:4232) /* MSVC extension, dllimport identity */
#endif
/*
* If a memory-using function (like curl_getenv) is used before
* curl_global_init() is called, we need to have these pointers set already.
*/
curl_malloc_callback Curl_cmalloc = (curl_malloc_callback)malloc;
curl_free_callback Curl_cfree = (curl_free_callback)free;
curl_realloc_callback Curl_crealloc = (curl_realloc_callback)realloc;
curl_strdup_callback Curl_cstrdup = (curl_strdup_callback)system_strdup;
curl_calloc_callback Curl_ccalloc = (curl_calloc_callback)calloc;
#if defined(WIN32) && defined(UNICODE)
curl_wcsdup_callback Curl_cwcsdup = (curl_wcsdup_callback)_wcsdup;
#endif
#if defined(_MSC_VER) && defined(_DLL) && !defined(__POCC__)
# pragma warning(default:4232) /* MSVC extension, dllimport identity */
#endif
#ifdef DEBUGBUILD
static char *leakpointer;
#endif
/**
* curl_global_init() globally initializes curl given a bitwise set of the
* different features of what to initialize.
*/
static CURLcode global_init(long flags, bool memoryfuncs)
{
if(initialized++)
return CURLE_OK;
if(memoryfuncs) {
/* Setup the default memory functions here (again) */
Curl_cmalloc = (curl_malloc_callback)malloc;
Curl_cfree = (curl_free_callback)free;
Curl_crealloc = (curl_realloc_callback)realloc;
Curl_cstrdup = (curl_strdup_callback)system_strdup;
Curl_ccalloc = (curl_calloc_callback)calloc;
#if defined(WIN32) && defined(UNICODE)
Curl_cwcsdup = (curl_wcsdup_callback)_wcsdup;
#endif
}
if(!Curl_ssl_init()) {
DEBUGF(fprintf(stderr, "Error: Curl_ssl_init failed\n"));
goto fail;
}
#ifdef WIN32
if(Curl_win32_init(flags)) {
DEBUGF(fprintf(stderr, "Error: win32_init failed\n"));
goto fail;
}
#endif
#ifdef __AMIGA__
if(!Curl_amiga_init()) {
DEBUGF(fprintf(stderr, "Error: Curl_amiga_init failed\n"));
goto fail;
}
#endif
#ifdef NETWARE
if(netware_init()) {
DEBUGF(fprintf(stderr, "Warning: LONG namespace not available\n"));
}
#endif
if(Curl_resolver_global_init()) {
DEBUGF(fprintf(stderr, "Error: resolver_global_init failed\n"));
goto fail;
}
#if defined(USE_SSH)
if(Curl_ssh_init()) {
goto fail;
}
#endif
#ifdef USE_WOLFSSH
if(WS_SUCCESS != wolfSSH_Init()) {
DEBUGF(fprintf(stderr, "Error: wolfSSH_Init failed\n"));
return CURLE_FAILED_INIT;
}
#endif
init_flags = flags;
#ifdef DEBUGBUILD
if(getenv("CURL_GLOBAL_INIT"))
/* alloc data that will leak if *cleanup() is not called! */
leakpointer = malloc(1);
#endif
return CURLE_OK;
fail:
initialized--; /* undo the increase */
return CURLE_FAILED_INIT;
}
/**
* curl_global_init() globally initializes curl given a bitwise set of the
* different features of what to initialize.
*/
CURLcode curl_global_init(long flags)
{
return global_init(flags, TRUE);
}
/*
* curl_global_init_mem() globally initializes curl and also registers the
* user provided callback routines.
*/
CURLcode curl_global_init_mem(long flags, curl_malloc_callback m,
curl_free_callback f, curl_realloc_callback r,
curl_strdup_callback s, curl_calloc_callback c)
{
/* Invalid input, return immediately */
if(!m || !f || !r || !s || !c)
return CURLE_FAILED_INIT;
if(initialized) {
/* Already initialized, don't do it again, but bump the variable anyway to
work like curl_global_init() and require the same amount of cleanup
calls. */
initialized++;
return CURLE_OK;
}
/* set memory functions before global_init() in case it wants memory
functions */
Curl_cmalloc = m;
Curl_cfree = f;
Curl_cstrdup = s;
Curl_crealloc = r;
Curl_ccalloc = c;
/* Call the actual init function, but without setting */
return global_init(flags, FALSE);
}
/**
* curl_global_cleanup() globally cleanups curl, uses the value of
* "init_flags" to determine what needs to be cleaned up and what doesn't.
*/
void curl_global_cleanup(void)
{
if(!initialized)
return;
if(--initialized)
return;
Curl_ssl_cleanup();
Curl_resolver_global_cleanup();
#ifdef WIN32
Curl_win32_cleanup(init_flags);
#endif
Curl_amiga_cleanup();
Curl_ssh_cleanup();
#ifdef USE_WOLFSSH
(void)wolfSSH_Cleanup();
#endif
#ifdef DEBUGBUILD
free(leakpointer);
#endif
init_flags = 0;
}
/*
* curl_easy_init() is the external interface to alloc, setup and init an
* easy handle that is returned. If anything goes wrong, NULL is returned.
*/
struct Curl_easy *curl_easy_init(void)
{
CURLcode result;
struct Curl_easy *data;
/* Make sure we inited the global SSL stuff */
if(!initialized) {
result = curl_global_init(CURL_GLOBAL_DEFAULT);
if(result) {
/* something in the global init failed, return nothing */
DEBUGF(fprintf(stderr, "Error: curl_global_init failed\n"));
return NULL;
}
}
/* We use curl_open() with undefined URL so far */
result = Curl_open(&data);
if(result) {
DEBUGF(fprintf(stderr, "Error: Curl_open failed\n"));
return NULL;
}
return data;
}
#ifdef CURLDEBUG
struct socketmonitor {
struct socketmonitor *next; /* the next node in the list or NULL */
struct pollfd socket; /* socket info of what to monitor */
};
struct events {
long ms; /* timeout, run the timeout function when reached */
bool msbump; /* set TRUE when timeout is set by callback */
int num_sockets; /* number of nodes in the monitor list */
struct socketmonitor *list; /* list of sockets to monitor */
int running_handles; /* store the returned number */
};
/* events_timer
*
* Callback that gets called with a new value when the timeout should be
* updated.
*/
static int events_timer(struct Curl_multi *multi, /* multi handle */
long timeout_ms, /* see above */
void *userp) /* private callback pointer */
{
struct events *ev = userp;
(void)multi;
if(timeout_ms == -1)
/* timeout removed */
timeout_ms = 0;
else if(timeout_ms == 0)
/* timeout is already reached! */
timeout_ms = 1; /* trigger asap */
ev->ms = timeout_ms;
ev->msbump = TRUE;
return 0;
}
/* poll2cselect
*
* convert from poll() bit definitions to libcurl's CURL_CSELECT_* ones
*/
static int poll2cselect(int pollmask)
{
int omask = 0;
if(pollmask & POLLIN)
omask |= CURL_CSELECT_IN;
if(pollmask & POLLOUT)
omask |= CURL_CSELECT_OUT;
if(pollmask & POLLERR)
omask |= CURL_CSELECT_ERR;
return omask;
}
/* socketcb2poll
*
* convert from libcurl' CURL_POLL_* bit definitions to poll()'s
*/
static short socketcb2poll(int pollmask)
{
short omask = 0;
if(pollmask & CURL_POLL_IN)
omask |= POLLIN;
if(pollmask & CURL_POLL_OUT)
omask |= POLLOUT;
return omask;
}
/* events_socket
*
* Callback that gets called with information about socket activity to
* monitor.
*/
static int events_socket(struct Curl_easy *easy, /* easy handle */
curl_socket_t s, /* socket */
int what, /* see above */
void *userp, /* private callback
pointer */
void *socketp) /* private socket
pointer */
{
struct events *ev = userp;
struct socketmonitor *m;
struct socketmonitor *prev = NULL;
#if defined(CURL_DISABLE_VERBOSE_STRINGS)
(void) easy;
#endif
(void)socketp;
m = ev->list;
while(m) {
if(m->socket.fd == s) {
if(what == CURL_POLL_REMOVE) {
struct socketmonitor *nxt = m->next;
/* remove this node from the list of monitored sockets */
if(prev)
prev->next = nxt;
else
ev->list = nxt;
free(m);
m = nxt;
infof(easy, "socket cb: socket %d REMOVED\n", s);
}
else {
/* The socket 's' is already being monitored, update the activity
mask. Convert from libcurl bitmask to the poll one. */
m->socket.events = socketcb2poll(what);
infof(easy, "socket cb: socket %d UPDATED as %s%s\n", s,
(what&CURL_POLL_IN)?"IN":"",
(what&CURL_POLL_OUT)?"OUT":"");
}
break;
}
prev = m;
m = m->next; /* move to next node */
}
if(!m) {
if(what == CURL_POLL_REMOVE) {
/* this happens a bit too often, libcurl fix perhaps? */
/* fprintf(stderr,
"%s: socket %d asked to be REMOVED but not present!\n",
__func__, s); */
}
else {
m = malloc(sizeof(struct socketmonitor));
if(m) {
m->next = ev->list;
m->socket.fd = s;
m->socket.events = socketcb2poll(what);
m->socket.revents = 0;
ev->list = m;
infof(easy, "socket cb: socket %d ADDED as %s%s\n", s,
(what&CURL_POLL_IN)?"IN":"",
(what&CURL_POLL_OUT)?"OUT":"");
}
else
return CURLE_OUT_OF_MEMORY;
}
}
return 0;
}
/*
* events_setup()
*
* Do the multi handle setups that only event-based transfers need.
*/
static void events_setup(struct Curl_multi *multi, struct events *ev)
{
/* timer callback */
curl_multi_setopt(multi, CURLMOPT_TIMERFUNCTION, events_timer);
curl_multi_setopt(multi, CURLMOPT_TIMERDATA, ev);
/* socket callback */
curl_multi_setopt(multi, CURLMOPT_SOCKETFUNCTION, events_socket);
curl_multi_setopt(multi, CURLMOPT_SOCKETDATA, ev);
}
/* wait_or_timeout()
*
* waits for activity on any of the given sockets, or the timeout to trigger.
*/
static CURLcode wait_or_timeout(struct Curl_multi *multi, struct events *ev)
{
bool done = FALSE;
CURLMcode mcode = CURLM_OK;
CURLcode result = CURLE_OK;
while(!done) {
CURLMsg *msg;
struct socketmonitor *m;
struct pollfd *f;
struct pollfd fds[4];
int numfds = 0;
int pollrc;
int i;
struct curltime before;
struct curltime after;
/* populate the fds[] array */
for(m = ev->list, f = &fds[0]; m; m = m->next) {
f->fd = m->socket.fd;
f->events = m->socket.events;
f->revents = 0;
/* fprintf(stderr, "poll() %d check socket %d\n", numfds, f->fd); */
f++;
numfds++;
}
/* get the time stamp to use to figure out how long poll takes */
before = Curl_now();
/* wait for activity or timeout */
pollrc = Curl_poll(fds, numfds, ev->ms);
after = Curl_now();
ev->msbump = FALSE; /* reset here */
if(0 == pollrc) {
/* timeout! */
ev->ms = 0;
/* fprintf(stderr, "call curl_multi_socket_action(TIMEOUT)\n"); */
mcode = curl_multi_socket_action(multi, CURL_SOCKET_TIMEOUT, 0,
&ev->running_handles);
}
else if(pollrc > 0) {
/* loop over the monitored sockets to see which ones had activity */
for(i = 0; i< numfds; i++) {
if(fds[i].revents) {
/* socket activity, tell libcurl */
int act = poll2cselect(fds[i].revents); /* convert */
infof(multi->easyp, "call curl_multi_socket_action(socket %d)\n",
fds[i].fd);
mcode = curl_multi_socket_action(multi, fds[i].fd, act,
&ev->running_handles);
}
}
if(!ev->msbump) {
/* If nothing updated the timeout, we decrease it by the spent time.
* If it was updated, it has the new timeout time stored already.
*/
timediff_t timediff = Curl_timediff(after, before);
if(timediff > 0) {
if(timediff > ev->ms)
ev->ms = 0;
else
ev->ms -= (long)timediff;
}
}
}
else
return CURLE_RECV_ERROR;
if(mcode)
return CURLE_URL_MALFORMAT;
/* we don't really care about the "msgs_in_queue" value returned in the
second argument */
msg = curl_multi_info_read(multi, &pollrc);
if(msg) {
result = msg->data.result;
done = TRUE;
}
}
return result;
}
/* easy_events()
*
* Runs a transfer in a blocking manner using the events-based API
*/
static CURLcode easy_events(struct Curl_multi *multi)
{
/* this struct is made static to allow it to be used after this function
returns and curl_multi_remove_handle() is called */
static struct events evs = {2, FALSE, 0, NULL, 0};
/* if running event-based, do some further multi inits */
events_setup(multi, &evs);
return wait_or_timeout(multi, &evs);
}
#else /* CURLDEBUG */
/* when not built with debug, this function doesn't exist */
#define easy_events(x) CURLE_NOT_BUILT_IN
#endif
static CURLcode easy_transfer(struct Curl_multi *multi)
{
bool done = FALSE;
CURLMcode mcode = CURLM_OK;
CURLcode result = CURLE_OK;
while(!done && !mcode) {
int still_running = 0;
mcode = curl_multi_poll(multi, NULL, 0, 1000, NULL);
if(!mcode)
mcode = curl_multi_perform(multi, &still_running);
/* only read 'still_running' if curl_multi_perform() return OK */
if(!mcode && !still_running) {
int rc;
CURLMsg *msg = curl_multi_info_read(multi, &rc);
if(msg) {
result = msg->data.result;
done = TRUE;
}
}
}
/* Make sure to return some kind of error if there was a multi problem */
if(mcode) {
result = (mcode == CURLM_OUT_OF_MEMORY) ? CURLE_OUT_OF_MEMORY :
/* The other multi errors should never happen, so return
something suitably generic */
CURLE_BAD_FUNCTION_ARGUMENT;
}
return result;
}
/*
* easy_perform() is the external interface that performs a blocking
* transfer as previously setup.
*
* CONCEPT: This function creates a multi handle, adds the easy handle to it,
* runs curl_multi_perform() until the transfer is done, then detaches the
* easy handle, destroys the multi handle and returns the easy handle's return
* code.
*
* REALITY: it can't just create and destroy the multi handle that easily. It
* needs to keep it around since if this easy handle is used again by this
* function, the same multi handle must be re-used so that the same pools and
* caches can be used.
*
* DEBUG: if 'events' is set TRUE, this function will use a replacement engine
* instead of curl_multi_perform() and use curl_multi_socket_action().
*/
static CURLcode easy_perform(struct Curl_easy *data, bool events)
{
struct Curl_multi *multi;
CURLMcode mcode;
CURLcode result = CURLE_OK;
SIGPIPE_VARIABLE(pipe_st);
if(!data)
return CURLE_BAD_FUNCTION_ARGUMENT;
if(data->set.errorbuffer)
/* clear this as early as possible */
data->set.errorbuffer[0] = 0;
if(data->multi) {
failf(data, "easy handle already used in multi handle");
return CURLE_FAILED_INIT;
}
if(data->multi_easy)
multi = data->multi_easy;
else {
/* this multi handle will only ever have a single easy handled attached
to it, so make it use minimal hashes */
multi = Curl_multi_handle(1, 3);
if(!multi)
return CURLE_OUT_OF_MEMORY;
data->multi_easy = multi;
}
if(multi->in_callback)
return CURLE_RECURSIVE_API_CALL;
/* Copy the MAXCONNECTS option to the multi handle */
curl_multi_setopt(multi, CURLMOPT_MAXCONNECTS, data->set.maxconnects);
mcode = curl_multi_add_handle(multi, data);
if(mcode) {
curl_multi_cleanup(multi);
data->multi_easy = NULL;
if(mcode == CURLM_OUT_OF_MEMORY)
return CURLE_OUT_OF_MEMORY;
return CURLE_FAILED_INIT;
}
sigpipe_ignore(data, &pipe_st);
/* run the transfer */
result = events ? easy_events(multi) : easy_transfer(multi);
/* ignoring the return code isn't nice, but atm we can't really handle
a failure here, room for future improvement! */
(void)curl_multi_remove_handle(multi, data);
sigpipe_restore(&pipe_st);
/* The multi handle is kept alive, owned by the easy handle */
return result;
}
/*
* curl_easy_perform() is the external interface that performs a blocking
* transfer as previously setup.
*/
CURLcode curl_easy_perform(struct Curl_easy *data)
{
return easy_perform(data, FALSE);
}
#ifdef CURLDEBUG
/*
* curl_easy_perform_ev() is the external interface that performs a blocking
* transfer using the event-based API internally.
*/
CURLcode curl_easy_perform_ev(struct Curl_easy *data)
{
return easy_perform(data, TRUE);
}
#endif
/*
* curl_easy_cleanup() is the external interface to cleaning/freeing the given
* easy handle.
*/
void curl_easy_cleanup(struct Curl_easy *data)
{
SIGPIPE_VARIABLE(pipe_st);
if(!data)
return;
sigpipe_ignore(data, &pipe_st);
Curl_close(&data);
sigpipe_restore(&pipe_st);
}
/*
* curl_easy_getinfo() is an external interface that allows an app to retrieve
* information from a performed transfer and similar.
*/
#undef curl_easy_getinfo
CURLcode curl_easy_getinfo(struct Curl_easy *data, CURLINFO info, ...)
{
va_list arg;
void *paramp;
CURLcode result;
va_start(arg, info);
paramp = va_arg(arg, void *);
result = Curl_getinfo(data, info, paramp);
va_end(arg);
return result;
}
static CURLcode dupset(struct Curl_easy *dst, struct Curl_easy *src)
{
CURLcode result = CURLE_OK;
enum dupstring i;
enum dupblob j;
/* Copy src->set into dst->set first, then deal with the strings
afterwards */
dst->set = src->set;
Curl_mime_initpart(&dst->set.mimepost, dst);
/* clear all string pointers first */
memset(dst->set.str, 0, STRING_LAST * sizeof(char *));
/* duplicate all strings */
for(i = (enum dupstring)0; i< STRING_LASTZEROTERMINATED; i++) {
result = Curl_setstropt(&dst->set.str[i], src->set.str[i]);
if(result)
return result;
}
/* clear all blob pointers first */
memset(dst->set.blobs, 0, BLOB_LAST * sizeof(struct curl_blob *));
/* duplicate all blobs */
for(j = (enum dupblob)0; j < BLOB_LAST; j++) {
result = Curl_setblobopt(&dst->set.blobs[j], src->set.blobs[j]);
/* Curl_setstropt return CURLE_BAD_FUNCTION_ARGUMENT with blob */
if(result)
return result;
}
/* duplicate memory areas pointed to */
i = STRING_COPYPOSTFIELDS;
if(src->set.postfieldsize && src->set.str[i]) {
/* postfieldsize is curl_off_t, Curl_memdup() takes a size_t ... */
dst->set.str[i] = Curl_memdup(src->set.str[i],
curlx_sotouz(src->set.postfieldsize));
if(!dst->set.str[i])
return CURLE_OUT_OF_MEMORY;
/* point to the new copy */
dst->set.postfields = dst->set.str[i];
}
/* Duplicate mime data. */
result = Curl_mime_duppart(&dst->set.mimepost, &src->set.mimepost);
if(src->set.resolve)
dst->change.resolve = dst->set.resolve;
return result;
}
/*
* curl_easy_duphandle() is an external interface to allow duplication of a
* given input easy handle. The returned handle will be a new working handle
* with all options set exactly as the input source handle.
*/
struct Curl_easy *curl_easy_duphandle(struct Curl_easy *data)
{
struct Curl_easy *outcurl = calloc(1, sizeof(struct Curl_easy));
if(NULL == outcurl)
goto fail;
/*
* We setup a few buffers we need. We should probably make them
* get setup on-demand in the code, as that would probably decrease
* the likeliness of us forgetting to init a buffer here in the future.
*/
outcurl->set.buffer_size = data->set.buffer_size;
/* copy all userdefined values */
if(dupset(outcurl, data))
goto fail;
Curl_dyn_init(&outcurl->state.headerb, CURL_MAX_HTTP_HEADER);
/* the connection cache is setup on demand */
outcurl->state.conn_cache = NULL;
outcurl->state.lastconnect_id = -1;
outcurl->progress.flags = data->progress.flags;
outcurl->progress.callback = data->progress.callback;
if(data->cookies) {
/* If cookies are enabled in the parent handle, we enable them
in the clone as well! */
outcurl->cookies = Curl_cookie_init(data,
data->cookies->filename,
outcurl->cookies,
data->set.cookiesession);
if(!outcurl->cookies)
goto fail;
}
/* duplicate all values in 'change' */
if(data->change.cookielist) {
outcurl->change.cookielist =
Curl_slist_duplicate(data->change.cookielist);
if(!outcurl->change.cookielist)
goto fail;
}
if(data->change.url) {
outcurl->change.url = strdup(data->change.url);
if(!outcurl->change.url)
goto fail;
outcurl->change.url_alloc = TRUE;
}
if(data->change.referer) {
outcurl->change.referer = strdup(data->change.referer);
if(!outcurl->change.referer)
goto fail;
outcurl->change.referer_alloc = TRUE;
}
/* Reinitialize an SSL engine for the new handle
* note: the engine name has already been copied by dupset */
if(outcurl->set.str[STRING_SSL_ENGINE]) {
if(Curl_ssl_set_engine(outcurl, outcurl->set.str[STRING_SSL_ENGINE]))
goto fail;
}
#ifdef USE_ALTSVC
if(data->asi) {
outcurl->asi = Curl_altsvc_init();
if(!outcurl->asi)
goto fail;
if(outcurl->set.str[STRING_ALTSVC])
(void)Curl_altsvc_load(outcurl->asi, outcurl->set.str[STRING_ALTSVC]);
}
#endif
#ifdef USE_HSTS
if(data->hsts) {
outcurl->hsts = Curl_hsts_init();
if(!outcurl->hsts)
goto fail;
if(outcurl->set.str[STRING_HSTS])
(void)Curl_hsts_loadfile(outcurl,
outcurl->hsts, outcurl->set.str[STRING_HSTS]);
(void)Curl_hsts_loadcb(outcurl, outcurl->hsts);
}
#endif
/* Clone the resolver handle, if present, for the new handle */
if(Curl_resolver_duphandle(outcurl,
&outcurl->state.resolver,
data->state.resolver))
goto fail;
#ifdef USE_ARES
{
CURLcode rc;
rc = Curl_set_dns_servers(outcurl, data->set.str[STRING_DNS_SERVERS]);
if(rc && rc != CURLE_NOT_BUILT_IN)
goto fail;
rc = Curl_set_dns_interface(outcurl, data->set.str[STRING_DNS_INTERFACE]);
if(rc && rc != CURLE_NOT_BUILT_IN)
goto fail;
rc = Curl_set_dns_local_ip4(outcurl, data->set.str[STRING_DNS_LOCAL_IP4]);
if(rc && rc != CURLE_NOT_BUILT_IN)
goto fail;
rc = Curl_set_dns_local_ip6(outcurl, data->set.str[STRING_DNS_LOCAL_IP6]);
if(rc && rc != CURLE_NOT_BUILT_IN)
goto fail;
}
#endif /* USE_ARES */
Curl_convert_setup(outcurl);
Curl_initinfo(outcurl);
outcurl->magic = CURLEASY_MAGIC_NUMBER;
/* we reach this point and thus we are OK */
return outcurl;
fail:
if(outcurl) {
curl_slist_free_all(outcurl->change.cookielist);
outcurl->change.cookielist = NULL;
Curl_safefree(outcurl->state.buffer);
Curl_dyn_free(&outcurl->state.headerb);
Curl_safefree(outcurl->change.url);
Curl_safefree(outcurl->change.referer);
Curl_altsvc_cleanup(&outcurl->asi);
Curl_hsts_cleanup(&outcurl->hsts);
Curl_freeset(outcurl);
free(outcurl);
}
return NULL;
}
/*
* curl_easy_reset() is an external interface that allows an app to re-
* initialize a session handle to the default values.
*/
void curl_easy_reset(struct Curl_easy *data)
{
Curl_free_request_state(data);
/* zero out UserDefined data: */
Curl_freeset(data);
memset(&data->set, 0, sizeof(struct UserDefined));
(void)Curl_init_userdefined(data);
/* zero out Progress data: */
memset(&data->progress, 0, sizeof(struct Progress));
/* zero out PureInfo data: */
Curl_initinfo(data);
data->progress.flags |= PGRS_HIDE;
data->state.current_speed = -1; /* init to negative == impossible */
data->state.retrycount = 0; /* reset the retry counter */
/* zero out authentication data: */
memset(&data->state.authhost, 0, sizeof(struct auth));
memset(&data->state.authproxy, 0, sizeof(struct auth));
#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_CRYPTO_AUTH)
Curl_http_auth_cleanup_digest(data);
#endif
}
/*
* curl_easy_pause() allows an application to pause or unpause a specific
* transfer and direction. This function sets the full new state for the
* current connection this easy handle operates on.
*
* NOTE: if you have the receiving paused and you call this function to remove
* the pausing, you may get your write callback called at this point.
*
* Action is a bitmask consisting of CURLPAUSE_* bits in curl/curl.h
*
* NOTE: This is one of few API functions that are allowed to be called from
* within a callback.
*/
CURLcode curl_easy_pause(struct Curl_easy *data, int action)
{
struct SingleRequest *k;
CURLcode result = CURLE_OK;
int oldstate;
int newstate;
if(!GOOD_EASY_HANDLE(data) || !data->conn)
/* crazy input, don't continue */
return CURLE_BAD_FUNCTION_ARGUMENT;
k = &data->req;
oldstate = k->keepon & (KEEP_RECV_PAUSE| KEEP_SEND_PAUSE);
/* first switch off both pause bits then set the new pause bits */
newstate = (k->keepon &~ (KEEP_RECV_PAUSE| KEEP_SEND_PAUSE)) |
((action & CURLPAUSE_RECV)?KEEP_RECV_PAUSE:0) |
((action & CURLPAUSE_SEND)?KEEP_SEND_PAUSE:0);
if((newstate & (KEEP_RECV_PAUSE| KEEP_SEND_PAUSE)) == oldstate) {
/* Not changing any pause state, return */
DEBUGF(infof(data, "pause: no change, early return\n"));
return CURLE_OK;
}
/* Unpause parts in active mime tree. */
if((k->keepon & ~newstate & KEEP_SEND_PAUSE) &&
(data->mstate == CURLM_STATE_PERFORM ||
data->mstate == CURLM_STATE_TOOFAST) &&
data->state.fread_func == (curl_read_callback) Curl_mime_read) {
Curl_mime_unpause(data->state.in);
}
/* put it back in the keepon */
k->keepon = newstate;
if(!(newstate & KEEP_RECV_PAUSE)) {
Curl_http2_stream_pause(data, FALSE);
if(data->state.tempcount) {
/* there are buffers for sending that can be delivered as the receive
pausing is lifted! */
unsigned int i;
unsigned int count = data->state.tempcount;
struct tempbuf writebuf[3]; /* there can only be three */
struct connectdata *conn = data->conn;
struct Curl_easy *saved_data = NULL;
/* copy the structs to allow for immediate re-pausing */
for(i = 0; i < data->state.tempcount; i++) {
writebuf[i] = data->state.tempwrite[i];
Curl_dyn_init(&data->state.tempwrite[i].b, DYN_PAUSE_BUFFER);
}
data->state.tempcount = 0;
/* set the connection's current owner */
if(conn->data != data) {
saved_data = conn->data;
conn->data = data;
}
for(i = 0; i < count; i++) {
/* even if one function returns error, this loops through and frees
all buffers */
if(!result)
result = Curl_client_write(conn, writebuf[i].type,
Curl_dyn_ptr(&writebuf[i].b),
Curl_dyn_len(&writebuf[i].b));
Curl_dyn_free(&writebuf[i].b);
}
/* recover previous owner of the connection */
if(saved_data)
conn->data = saved_data;
if(result)
return result;
}
}
/* if there's no error and we're not pausing both directions, we want
to have this handle checked soon */
if((newstate & (KEEP_RECV_PAUSE|KEEP_SEND_PAUSE)) !=
(KEEP_RECV_PAUSE|KEEP_SEND_PAUSE)) {
Curl_expire(data, 0, EXPIRE_RUN_NOW); /* get this handle going again */
/* reset the too-slow time keeper */
data->state.keeps_speed.tv_sec = 0;
if(!data->state.tempcount)
/* if not pausing again, force a recv/send check of this connection as
the data might've been read off the socket already */
data->conn->cselect_bits = CURL_CSELECT_IN | CURL_CSELECT_OUT;
if(data->multi)
Curl_update_timer(data->multi);
}
if(!data->state.done)
/* This transfer may have been moved in or out of the bundle, update the
corresponding socket callback, if used */
Curl_updatesocket(data);
return result;
}
static CURLcode easy_connection(struct Curl_easy *data,
curl_socket_t *sfd,
struct connectdata **connp)
{
if(data == NULL)
return CURLE_BAD_FUNCTION_ARGUMENT;
/* only allow these to be called on handles with CURLOPT_CONNECT_ONLY */
if(!data->set.connect_only) {
failf(data, "CONNECT_ONLY is required!");
return CURLE_UNSUPPORTED_PROTOCOL;
}
*sfd = Curl_getconnectinfo(data, connp);
if(*sfd == CURL_SOCKET_BAD) {
failf(data, "Failed to get recent socket");
return CURLE_UNSUPPORTED_PROTOCOL;
}
return CURLE_OK;
}
/*
* Receives data from the connected socket. Use after successful
* curl_easy_perform() with CURLOPT_CONNECT_ONLY option.
* Returns CURLE_OK on success, error code on error.
*/
CURLcode curl_easy_recv(struct Curl_easy *data, void *buffer, size_t buflen,
size_t *n)
{
curl_socket_t sfd;
CURLcode result;
ssize_t n1;
struct connectdata *c;
if(Curl_is_in_callback(data))
return CURLE_RECURSIVE_API_CALL;
result = easy_connection(data, &sfd, &c);
if(result)
return result;
*n = 0;
result = Curl_read(c, sfd, buffer, buflen, &n1);
if(result)
return result;
*n = (size_t)n1;
return CURLE_OK;
}
/*
* Sends data over the connected socket. Use after successful
* curl_easy_perform() with CURLOPT_CONNECT_ONLY option.
*/
CURLcode curl_easy_send(struct Curl_easy *data, const void *buffer,
size_t buflen, size_t *n)
{
curl_socket_t sfd;
CURLcode result;
ssize_t n1;
struct connectdata *c = NULL;
if(Curl_is_in_callback(data))
return CURLE_RECURSIVE_API_CALL;
result = easy_connection(data, &sfd, &c);
if(result)
return result;
*n = 0;
result = Curl_write(c, sfd, buffer, buflen, &n1);
if(n1 == -1)
return CURLE_SEND_ERROR;
/* detect EAGAIN */
if(!result && !n1)
return CURLE_AGAIN;
*n = (size_t)n1;
return result;
}
/*
* Wrapper to call functions in Curl_conncache_foreach()
*
* Returns always 0.
*/
static int conn_upkeep(struct connectdata *conn,
void *param)
{
/* Param is unused. */
(void)param;
if(conn->handler->connection_check) {
/* Do a protocol-specific keepalive check on the connection. */
conn->handler->connection_check(conn, CONNCHECK_KEEPALIVE);
}
return 0; /* continue iteration */
}
static CURLcode upkeep(struct conncache *conn_cache, void *data)
{
/* Loop over every connection and make connection alive. */
Curl_conncache_foreach(data,
conn_cache,
data,
conn_upkeep);
return CURLE_OK;
}
/*
* Performs connection upkeep for the given session handle.
*/
CURLcode curl_easy_upkeep(struct Curl_easy *data)
{
/* Verify that we got an easy handle we can work with. */
if(!GOOD_EASY_HANDLE(data))
return CURLE_BAD_FUNCTION_ARGUMENT;
if(data->multi_easy) {
/* Use the common function to keep connections alive. */
return upkeep(&data->multi_easy->conn_cache, data);
}
else {
/* No connections, so just return success */
return CURLE_OK;
}
}
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