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fa2f134cbd
curl/lib/easy.c
Daniel Stenberg 4dee50b9c8 timeval: struct curltime is a struct timeval replacement 
... to make all libcurl internals able to use the same data types for
the struct members. The timeval struct differs subtly on several
platforms so it makes it cumbersome to use everywhere.

Ref: #1652
Closes #1693
2017-07-28 15:51:25 +02:00

1140 lines
30 KiB
C
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2017, 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.haxx.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 "select.h"
#include "sendf.h" /* for failf function prototype */
#include "connect.h" /* for Curl_getconnectinfo */
#include "slist.h"
#include "amigaos.h"
#include "non-ascii.h"
#include "warnless.h"
#include "conncache.h"
#include "multiif.h"
#include "sigpipe.h"
#include "ssh.h"
/* The last 3 #include files should be in this order */
#include "curl_printf.h"
#include "curl_memory.h"
#include "memdebug.h"
void Curl_version_init(void);
/* win32_cleanup() is for win32 socket cleanup functionality, the opposite
of win32_init() */
static void win32_cleanup(void)
{
#ifdef USE_WINSOCK
WSACleanup();
#endif
#ifdef USE_WINDOWS_SSPI
Curl_sspi_global_cleanup();
#endif
}
/* win32_init() performs win32 socket initialization to properly setup the
stack to allow networking */
static CURLcode win32_init(void)
{
#ifdef USE_WINSOCK
WORD wVersionRequested;
WSADATA wsaData;
int res;
#if defined(ENABLE_IPV6) && (USE_WINSOCK < 2)
Error IPV6_requires_winsock2
#endif
wVersionRequested = MAKEWORD(USE_WINSOCK, USE_WINSOCK);
res = WSAStartup(wVersionRequested, &wsaData);
if(res != 0)
/* Tell the user that we couldn't find a useable */
/* winsock.dll. */
return CURLE_FAILED_INIT;
/* Confirm that the Windows Sockets DLL supports what we need.*/
/* Note that if the DLL supports versions greater */
/* than wVersionRequested, it will still return */
/* wVersionRequested in wVersion. wHighVersion contains the */
/* highest supported version. */
if(LOBYTE(wsaData.wVersion) != LOBYTE(wVersionRequested) ||
HIBYTE(wsaData.wVersion) != HIBYTE(wVersionRequested) ) {
/* Tell the user that we couldn't find a useable */
/* winsock.dll. */
WSACleanup();
return CURLE_FAILED_INIT;
}
/* The Windows Sockets DLL is acceptable. Proceed. */
#elif defined(USE_LWIPSOCK)
lwip_init();
#endif
#ifdef USE_WINDOWS_SSPI
{
CURLcode result = Curl_sspi_global_init();
if(result)
return result;
}
#endif
return CURLE_OK;
}
/* 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
#ifndef __SYMBIAN32__
/*
* 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
#else
/*
* Symbian OS doesn't support initialization to code in writable static data.
* Initialization will occur in the curl_global_init() call.
*/
curl_malloc_callback Curl_cmalloc;
curl_free_callback Curl_cfree;
curl_realloc_callback Curl_crealloc;
curl_strdup_callback Curl_cstrdup;
curl_calloc_callback Curl_ccalloc;
#endif
#if defined(_MSC_VER) && defined(_DLL) && !defined(__POCC__)
# pragma warning(default:4232) /* MSVC extension, dllimport identity */
#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(flags & CURL_GLOBAL_SSL)
if(!Curl_ssl_init()) {
DEBUGF(fprintf(stderr, "Error: Curl_ssl_init failed\n"));
return CURLE_FAILED_INIT;
}
if(flags & CURL_GLOBAL_WIN32)
if(win32_init()) {
DEBUGF(fprintf(stderr, "Error: win32_init failed\n"));
return CURLE_FAILED_INIT;
}
#ifdef __AMIGA__
if(!Curl_amiga_init()) {
DEBUGF(fprintf(stderr, "Error: Curl_amiga_init failed\n"));
return CURLE_FAILED_INIT;
}
#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"));
return CURLE_FAILED_INIT;
}
(void)Curl_ipv6works();
#if defined(USE_LIBSSH2) && defined(HAVE_LIBSSH2_INIT)
if(libssh2_init(0)) {
DEBUGF(fprintf(stderr, "Error: libssh2_init failed\n"));
return CURLE_FAILED_INIT;
}
#endif
if(flags & CURL_GLOBAL_ACK_EINTR)
Curl_ack_eintr = 1;
init_flags = flags;
Curl_version_init();
return CURLE_OK;
}
/**
* 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_global_host_cache_dtor();
if(init_flags & CURL_GLOBAL_SSL)
Curl_ssl_cleanup();
Curl_resolver_global_cleanup();
if(init_flags & CURL_GLOBAL_WIN32)
win32_cleanup();
Curl_amiga_cleanup();
#if defined(USE_LIBSSH2) && defined(HAVE_LIBSSH2_EXIT)
(void)libssh2_exit();
#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;
}
/*
* curl_easy_setopt() is the external interface for setting options on an
* easy handle.
*/
#undef curl_easy_setopt
CURLcode curl_easy_setopt(struct Curl_easy *data, CURLoption tag, ...)
{
va_list arg;
CURLcode result;
if(!data)
return CURLE_BAD_FUNCTION_ARGUMENT;
va_start(arg, tag);
result = Curl_setopt(data, tag, arg);
va_end(arg);
return result;
}
#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 = curlx_tvnow();
/* wait for activity or timeout */
pollrc = Curl_poll(fds, numfds, (int)ev->ms);
after = curlx_tvnow();
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.
*/
time_t timediff = curlx_tvdiff(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; /* TODO: return a proper error! */
/* 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)
{
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;
struct curltime before;
int without_fds = 0; /* count number of consecutive returns from
curl_multi_wait() without any filedescriptors */
while(!done && !mcode) {
int still_running = 0;
int rc;
before = curlx_tvnow();
mcode = curl_multi_wait(multi, NULL, 0, 1000, &rc);
if(!mcode) {
if(!rc) {
struct curltime after = curlx_tvnow();
/* If it returns without any filedescriptor instantly, we need to
avoid busy-looping during periods where it has nothing particular
to wait for */
if(curlx_tvdiff(after, before) <= 10) {
without_fds++;
if(without_fds > 2) {
int sleep_ms = without_fds < 10 ? (1 << (without_fds - 1)) : 1000;
Curl_wait_ms(sleep_ms);
}
}
else
/* it wasn't "instant", restart counter */
without_fds = 0;
}
else
/* got file descriptor, restart counter */
without_fds = 0;
mcode = curl_multi_perform(multi, &still_running);
}
/* only read 'still_running' if curl_multi_perform() return OK */
if(!mcode && !still_running) {
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->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;
}
/* 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);
if(mcode == CURLM_OUT_OF_MEMORY)
return CURLE_OUT_OF_MEMORY;
return CURLE_FAILED_INIT;
}
sigpipe_ignore(data, &pipe_st);
/* assign this after curl_multi_add_handle() since that function checks for
it and rejects this handle otherwise */
data->multi = multi;
/* 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;
}
/*
* 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;
outcurl->state.buffer = malloc(outcurl->set.buffer_size + 1);
if(!outcurl->state.buffer)
goto fail;
outcurl->state.headerbuff = malloc(HEADERSIZE);
if(!outcurl->state.headerbuff)
goto fail;
outcurl->state.headersize = HEADERSIZE;
/* copy all userdefined values */
if(Curl_dupset(outcurl, data))
goto fail;
/* the connection cache is setup on demand */
outcurl->state.conn_cache = NULL;
outcurl->state.lastconnect = NULL;
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;
}
/* Clone the resolver handle, if present, for the new handle */
if(Curl_resolver_duphandle(&outcurl->state.resolver,
data->state.resolver))
goto fail;
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_safefree(outcurl->state.headerbuff);
Curl_safefree(outcurl->change.url);
Curl_safefree(outcurl->change.referer);
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_safefree(data->state.pathbuffer);
data->state.path = NULL;
Curl_free_request_state(data);
/* zero out UserDefined data: */
Curl_freeset(data);
memset(&data->set, 0, sizeof(struct UserDefined));
(void)Curl_init_userdefined(&data->set);
/* 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 */
/* zero out authentication data: */
memset(&data->state.authhost, 0, sizeof(struct auth));
memset(&data->state.authproxy, 0, sizeof(struct auth));
}
/*
* 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
*/
CURLcode curl_easy_pause(struct Curl_easy *data, int action)
{
struct SingleRequest *k = &data->req;
CURLcode result = CURLE_OK;
/* first switch off both pause bits */
int newstate = k->keepon &~ (KEEP_RECV_PAUSE| KEEP_SEND_PAUSE);
/* set the new desired pause bits */
newstate |= ((action & CURLPAUSE_RECV)?KEEP_RECV_PAUSE:0) |
((action & CURLPAUSE_SEND)?KEEP_SEND_PAUSE:0);
/* put it back in the keepon */
k->keepon = newstate;
if(!(newstate & KEEP_RECV_PAUSE) && 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 */
/* copy the structs to allow for immediate re-pausing */
for(i=0; i < data->state.tempcount; i++) {
writebuf[i] = data->state.tempwrite[i];
data->state.tempwrite[i].buf = NULL;
}
data->state.tempcount = 0;
for(i=0; i < count; i++) {
/* even if one function returns error, this loops through and frees all
buffers */
if(!result)
result = Curl_client_chop_write(data->easy_conn,
writebuf[i].type,
writebuf[i].buf,
writebuf[i].len);
free(writebuf[i].buf);
}
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(!result &&
((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 */
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;
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;
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;
}
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