diff options
Diffstat (limited to 'libcurl/src/lib/multi.c')
| -rw-r--r-- | libcurl/src/lib/multi.c | 2815 |
1 files changed, 0 insertions, 2815 deletions
diff --git a/libcurl/src/lib/multi.c b/libcurl/src/lib/multi.c deleted file mode 100644 index cdba5a9..0000000 --- a/libcurl/src/lib/multi.c +++ /dev/null @@ -1,2815 +0,0 @@ -/***************************************************************************
- * _ _ ____ _
- * Project ___| | | | _ \| |
- * / __| | | | |_) | |
- * | (__| |_| | _ <| |___
- * \___|\___/|_| \_\_____|
- *
- * Copyright (C) 1998 - 2015, 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 http://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"
-
-#include <curl/curl.h>
-
-#include "urldata.h"
-#include "transfer.h"
-#include "url.h"
-#include "connect.h"
-#include "progress.h"
-#include "easyif.h"
-#include "share.h"
-#include "multiif.h"
-#include "sendf.h"
-#include "timeval.h"
-#include "http.h"
-#include "select.h"
-#include "warnless.h"
-#include "speedcheck.h"
-#include "conncache.h"
-#include "bundles.h"
-#include "multihandle.h"
-#include "pipeline.h"
-#include "sigpipe.h"
-#include "curl_printf.h"
-#include "curl_memory.h"
-/* The last #include file should be: */
-#include "memdebug.h"
-
-/*
- CURL_SOCKET_HASH_TABLE_SIZE should be a prime number. Increasing it from 97
- to 911 takes on a 32-bit machine 4 x 804 = 3211 more bytes. Still, every
- CURL handle takes 45-50 K memory, therefore this 3K are not significant.
-*/
-#ifndef CURL_SOCKET_HASH_TABLE_SIZE
-#define CURL_SOCKET_HASH_TABLE_SIZE 911
-#endif
-
-#define CURL_CONNECTION_HASH_SIZE 97
-
-#define CURL_MULTI_HANDLE 0x000bab1e
-
-#define GOOD_MULTI_HANDLE(x) \
- ((x) && (((struct Curl_multi *)(x))->type == CURL_MULTI_HANDLE))
-#define GOOD_EASY_HANDLE(x) \
- ((x) && (((struct SessionHandle *)(x))->magic == CURLEASY_MAGIC_NUMBER))
-
-static void singlesocket(struct Curl_multi *multi,
- struct SessionHandle *data);
-static int update_timer(struct Curl_multi *multi);
-
-static bool isHandleAtHead(struct SessionHandle *handle,
- struct curl_llist *pipeline);
-static CURLMcode add_next_timeout(struct timeval now,
- struct Curl_multi *multi,
- struct SessionHandle *d);
-static CURLMcode multi_timeout(struct Curl_multi *multi,
- long *timeout_ms);
-
-#ifdef DEBUGBUILD
-static const char * const statename[]={
- "INIT",
- "CONNECT_PEND",
- "CONNECT",
- "WAITRESOLVE",
- "WAITCONNECT",
- "WAITPROXYCONNECT",
- "SENDPROTOCONNECT",
- "PROTOCONNECT",
- "WAITDO",
- "DO",
- "DOING",
- "DO_MORE",
- "DO_DONE",
- "WAITPERFORM",
- "PERFORM",
- "TOOFAST",
- "DONE",
- "COMPLETED",
- "MSGSENT",
-};
-#endif
-
-static void multi_freetimeout(void *a, void *b);
-
-/* always use this function to change state, to make debugging easier */
-static void mstate(struct SessionHandle *data, CURLMstate state
-#ifdef DEBUGBUILD
- , int lineno
-#endif
-)
-{
- CURLMstate oldstate = data->mstate;
-
-#if defined(DEBUGBUILD) && defined(CURL_DISABLE_VERBOSE_STRINGS)
- (void) lineno;
-#endif
-
- if(oldstate == state)
- /* don't bother when the new state is the same as the old state */
- return;
-
- data->mstate = state;
-
-#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
- if(data->mstate >= CURLM_STATE_CONNECT_PEND &&
- data->mstate < CURLM_STATE_COMPLETED) {
- long connection_id = -5000;
-
- if(data->easy_conn)
- connection_id = data->easy_conn->connection_id;
-
- infof(data,
- "STATE: %s => %s handle %p; line %d (connection #%ld) \n",
- statename[oldstate], statename[data->mstate],
- (void *)data, lineno, connection_id);
- }
-#endif
-
- if(state == CURLM_STATE_COMPLETED)
- /* changing to COMPLETED means there's one less easy handle 'alive' */
- data->multi->num_alive--;
-}
-
-#ifndef DEBUGBUILD
-#define multistate(x,y) mstate(x,y)
-#else
-#define multistate(x,y) mstate(x,y, __LINE__)
-#endif
-
-/*
- * We add one of these structs to the sockhash for a particular socket
- */
-
-struct Curl_sh_entry {
- struct SessionHandle *easy;
- int action; /* what action READ/WRITE this socket waits for */
- curl_socket_t socket; /* mainly to ease debugging */
- void *socketp; /* settable by users with curl_multi_assign() */
-};
-/* bits for 'action' having no bits means this socket is not expecting any
- action */
-#define SH_READ 1
-#define SH_WRITE 2
-
-/* make sure this socket is present in the hash for this handle */
-static struct Curl_sh_entry *sh_addentry(struct curl_hash *sh,
- curl_socket_t s,
- struct SessionHandle *data)
-{
- struct Curl_sh_entry *there =
- Curl_hash_pick(sh, (char *)&s, sizeof(curl_socket_t));
- struct Curl_sh_entry *check;
-
- if(there)
- /* it is present, return fine */
- return there;
-
- /* not present, add it */
- check = calloc(1, sizeof(struct Curl_sh_entry));
- if(!check)
- return NULL; /* major failure */
-
- check->easy = data;
- check->socket = s;
-
- /* make/add new hash entry */
- if(!Curl_hash_add(sh, (char *)&s, sizeof(curl_socket_t), check)) {
- free(check);
- return NULL; /* major failure */
- }
-
- return check; /* things are good in sockhash land */
-}
-
-
-/* delete the given socket + handle from the hash */
-static void sh_delentry(struct curl_hash *sh, curl_socket_t s)
-{
- struct Curl_sh_entry *there =
- Curl_hash_pick(sh, (char *)&s, sizeof(curl_socket_t));
-
- if(there) {
- /* this socket is in the hash */
- /* We remove the hash entry. (This'll end up in a call to
- sh_freeentry().) */
- Curl_hash_delete(sh, (char *)&s, sizeof(curl_socket_t));
- }
-}
-
-/*
- * free a sockhash entry
- */
-static void sh_freeentry(void *freethis)
-{
- struct Curl_sh_entry *p = (struct Curl_sh_entry *) freethis;
-
- free(p);
-}
-
-static size_t fd_key_compare(void *k1, size_t k1_len, void *k2, size_t k2_len)
-{
- (void) k1_len; (void) k2_len;
-
- return (*((int *) k1)) == (*((int *) k2));
-}
-
-static size_t hash_fd(void *key, size_t key_length, size_t slots_num)
-{
- int fd = *((int *) key);
- (void) key_length;
-
- return (fd % (int)slots_num);
-}
-
-/*
- * sh_init() creates a new socket hash and returns the handle for it.
- *
- * Quote from README.multi_socket:
- *
- * "Some tests at 7000 and 9000 connections showed that the socket hash lookup
- * is somewhat of a bottle neck. Its current implementation may be a bit too
- * limiting. It simply has a fixed-size array, and on each entry in the array
- * it has a linked list with entries. So the hash only checks which list to
- * scan through. The code I had used so for used a list with merely 7 slots
- * (as that is what the DNS hash uses) but with 7000 connections that would
- * make an average of 1000 nodes in each list to run through. I upped that to
- * 97 slots (I believe a prime is suitable) and noticed a significant speed
- * increase. I need to reconsider the hash implementation or use a rather
- * large default value like this. At 9000 connections I was still below 10us
- * per call."
- *
- */
-static struct curl_hash *sh_init(int hashsize)
-{
- return Curl_hash_alloc(hashsize, hash_fd, fd_key_compare,
- sh_freeentry);
-}
-
-/*
- * multi_addmsg()
- *
- * Called when a transfer is completed. Adds the given msg pointer to
- * the list kept in the multi handle.
- */
-static CURLMcode multi_addmsg(struct Curl_multi *multi,
- struct Curl_message *msg)
-{
- if(!Curl_llist_insert_next(multi->msglist, multi->msglist->tail, msg))
- return CURLM_OUT_OF_MEMORY;
-
- return CURLM_OK;
-}
-
-/*
- * multi_freeamsg()
- *
- * Callback used by the llist system when a single list entry is destroyed.
- */
-static void multi_freeamsg(void *a, void *b)
-{
- (void)a;
- (void)b;
-}
-
-struct Curl_multi *Curl_multi_handle(int hashsize, /* socket hash */
- int chashsize) /* connection hash */
-{
- struct Curl_multi *multi = calloc(1, sizeof(struct Curl_multi));
-
- if(!multi)
- return NULL;
-
- multi->type = CURL_MULTI_HANDLE;
-
- multi->hostcache = Curl_mk_dnscache();
- if(!multi->hostcache)
- goto error;
-
- multi->sockhash = sh_init(hashsize);
- if(!multi->sockhash)
- goto error;
-
- multi->conn_cache = Curl_conncache_init(chashsize);
- if(!multi->conn_cache)
- goto error;
-
- multi->msglist = Curl_llist_alloc(multi_freeamsg);
- if(!multi->msglist)
- goto error;
-
- multi->pending = Curl_llist_alloc(multi_freeamsg);
- if(!multi->pending)
- goto error;
-
- /* allocate a new easy handle to use when closing cached connections */
- multi->closure_handle = curl_easy_init();
- if(!multi->closure_handle)
- goto error;
-
- multi->closure_handle->multi = multi;
- multi->closure_handle->state.conn_cache = multi->conn_cache;
-
- multi->max_pipeline_length = 5;
-
- /* -1 means it not set by user, use the default value */
- multi->maxconnects = -1;
- return (CURLM *) multi;
-
- error:
-
- Curl_hash_destroy(multi->sockhash);
- multi->sockhash = NULL;
- Curl_hash_destroy(multi->hostcache);
- multi->hostcache = NULL;
- Curl_conncache_destroy(multi->conn_cache);
- multi->conn_cache = NULL;
- Curl_close(multi->closure_handle);
- multi->closure_handle = NULL;
- Curl_llist_destroy(multi->msglist, NULL);
- Curl_llist_destroy(multi->pending, NULL);
-
- free(multi);
- return NULL;
-}
-
-CURLM *curl_multi_init(void)
-{
- return Curl_multi_handle(CURL_SOCKET_HASH_TABLE_SIZE,
- CURL_CONNECTION_HASH_SIZE);
-}
-
-CURLMcode curl_multi_add_handle(CURLM *multi_handle,
- CURL *easy_handle)
-{
- struct curl_llist *timeoutlist;
- struct Curl_multi *multi = (struct Curl_multi *)multi_handle;
- struct SessionHandle *data = (struct SessionHandle *)easy_handle;
-
- /* First, make some basic checks that the CURLM handle is a good handle */
- if(!GOOD_MULTI_HANDLE(multi))
- return CURLM_BAD_HANDLE;
-
- /* Verify that we got a somewhat good easy handle too */
- if(!GOOD_EASY_HANDLE(easy_handle))
- return CURLM_BAD_EASY_HANDLE;
-
- /* Prevent users from adding same easy handle more than once and prevent
- adding to more than one multi stack */
- if(data->multi)
- return CURLM_ADDED_ALREADY;
-
- /* Allocate and initialize timeout list for easy handle */
- timeoutlist = Curl_llist_alloc(multi_freetimeout);
- if(!timeoutlist)
- return CURLM_OUT_OF_MEMORY;
-
- /*
- * No failure allowed in this function beyond this point. And no
- * modification of easy nor multi handle allowed before this except for
- * potential multi's connection cache growing which won't be undone in this
- * function no matter what.
- */
-
- /* Make easy handle use timeout list initialized above */
- data->state.timeoutlist = timeoutlist;
- timeoutlist = NULL;
-
- /* set the easy handle */
- multistate(data, CURLM_STATE_INIT);
-
- if((data->set.global_dns_cache) &&
- (data->dns.hostcachetype != HCACHE_GLOBAL)) {
- /* global dns cache was requested but still isn't */
- struct curl_hash *global = Curl_global_host_cache_init();
- if(global) {
- /* only do this if the global cache init works */
- data->dns.hostcache = global;
- data->dns.hostcachetype = HCACHE_GLOBAL;
- }
- }
- /* for multi interface connections, we share DNS cache automatically if the
- easy handle's one is currently not set. */
- else if(!data->dns.hostcache ||
- (data->dns.hostcachetype == HCACHE_NONE)) {
- data->dns.hostcache = multi->hostcache;
- data->dns.hostcachetype = HCACHE_MULTI;
- }
-
- /* Point to the multi's connection cache */
- data->state.conn_cache = multi->conn_cache;
-
- data->state.infilesize = data->set.filesize;
-
- /* This adds the new entry at the 'end' of the doubly-linked circular
- list of SessionHandle structs to try and maintain a FIFO queue so
- the pipelined requests are in order. */
-
- /* We add this new entry last in the list. */
-
- data->next = NULL; /* end of the line */
- if(multi->easyp) {
- struct SessionHandle *last = multi->easylp;
- last->next = data;
- data->prev = last;
- multi->easylp = data; /* the new last node */
- }
- else {
- /* first node, make both prev and next be NULL! */
- data->next = NULL;
- data->prev = NULL;
- multi->easylp = multi->easyp = data; /* both first and last */
- }
-
- /* make the SessionHandle refer back to this multi handle */
- data->multi = multi_handle;
-
- /* Set the timeout for this handle to expire really soon so that it will
- be taken care of even when this handle is added in the midst of operation
- when only the curl_multi_socket() API is used. During that flow, only
- sockets that time-out or have actions will be dealt with. Since this
- handle has no action yet, we make sure it times out to get things to
- happen. */
- Curl_expire(data, 1);
-
- /* increase the node-counter */
- multi->num_easy++;
-
- /* increase the alive-counter */
- multi->num_alive++;
-
- /* A somewhat crude work-around for a little glitch in update_timer() that
- happens if the lastcall time is set to the same time when the handle is
- removed as when the next handle is added, as then the check in
- update_timer() that prevents calling the application multiple times with
- the same timer infor will not trigger and then the new handle's timeout
- will not be notified to the app.
-
- The work-around is thus simply to clear the 'lastcall' variable to force
- update_timer() to always trigger a callback to the app when a new easy
- handle is added */
- memset(&multi->timer_lastcall, 0, sizeof(multi->timer_lastcall));
-
- update_timer(multi);
- return CURLM_OK;
-}
-
-#if 0
-/* Debug-function, used like this:
- *
- * Curl_hash_print(multi->sockhash, debug_print_sock_hash);
- *
- * Enable the hash print function first by editing hash.c
- */
-static void debug_print_sock_hash(void *p)
-{
- struct Curl_sh_entry *sh = (struct Curl_sh_entry *)p;
-
- fprintf(stderr, " [easy %p/magic %x/socket %d]",
- (void *)sh->data, sh->data->magic, (int)sh->socket);
-}
-#endif
-
-CURLMcode curl_multi_remove_handle(CURLM *multi_handle,
- CURL *curl_handle)
-{
- struct Curl_multi *multi=(struct Curl_multi *)multi_handle;
- struct SessionHandle *easy = curl_handle;
- struct SessionHandle *data = easy;
- bool premature;
- bool easy_owns_conn;
- struct curl_llist_element *e;
-
- /* First, make some basic checks that the CURLM handle is a good handle */
- if(!GOOD_MULTI_HANDLE(multi))
- return CURLM_BAD_HANDLE;
-
- /* Verify that we got a somewhat good easy handle too */
- if(!GOOD_EASY_HANDLE(curl_handle))
- return CURLM_BAD_EASY_HANDLE;
-
- /* Prevent users from trying to remove same easy handle more than once */
- if(!data->multi)
- return CURLM_OK; /* it is already removed so let's say it is fine! */
-
- premature = (data->mstate < CURLM_STATE_COMPLETED) ? TRUE : FALSE;
- easy_owns_conn = (data->easy_conn && (data->easy_conn->data == easy)) ?
- TRUE : FALSE;
-
- /* If the 'state' is not INIT or COMPLETED, we might need to do something
- nice to put the easy_handle in a good known state when this returns. */
- if(premature) {
- /* this handle is "alive" so we need to count down the total number of
- alive connections when this is removed */
- multi->num_alive--;
-
- /* When this handle gets removed, other handles may be able to get the
- connection */
- Curl_multi_process_pending_handles(multi);
- }
-
- if(data->easy_conn &&
- data->mstate > CURLM_STATE_DO &&
- data->mstate < CURLM_STATE_COMPLETED) {
- /* If the handle is in a pipeline and has started sending off its
- request but not received its response yet, we need to close
- connection. */
- connclose(data->easy_conn, "Removed with partial response");
- /* Set connection owner so that Curl_done() closes it.
- We can safely do this here since connection is killed. */
- data->easy_conn->data = easy;
- easy_owns_conn = TRUE;
- }
-
- /* The timer must be shut down before data->multi is set to NULL,
- else the timenode will remain in the splay tree after
- curl_easy_cleanup is called. */
- Curl_expire(data, 0);
-
- /* destroy the timeout list that is held in the easy handle */
- if(data->state.timeoutlist) {
- Curl_llist_destroy(data->state.timeoutlist, NULL);
- data->state.timeoutlist = NULL;
- }
-
- if(data->dns.hostcachetype == HCACHE_MULTI) {
- /* stop using the multi handle's DNS cache */
- data->dns.hostcache = NULL;
- data->dns.hostcachetype = HCACHE_NONE;
- }
-
- if(data->easy_conn) {
-
- /* we must call Curl_done() here (if we still "own it") so that we don't
- leave a half-baked one around */
- if(easy_owns_conn) {
-
- /* Curl_done() clears the conn->data field to lose the association
- between the easy handle and the connection
-
- Note that this ignores the return code simply because there's
- nothing really useful to do with it anyway! */
- (void)Curl_done(&data->easy_conn, data->result, premature);
- }
- else
- /* Clear connection pipelines, if Curl_done above was not called */
- Curl_getoff_all_pipelines(data, data->easy_conn);
- }
-
- Curl_wildcard_dtor(&data->wildcard);
-
- /* as this was using a shared connection cache we clear the pointer to that
- since we're not part of that multi handle anymore */
- data->state.conn_cache = NULL;
-
- /* change state without using multistate(), only to make singlesocket() do
- what we want */
- data->mstate = CURLM_STATE_COMPLETED;
- singlesocket(multi, easy); /* to let the application know what sockets that
- vanish with this handle */
-
- /* Remove the association between the connection and the handle */
- if(data->easy_conn) {
- data->easy_conn->data = NULL;
- data->easy_conn = NULL;
- }
-
- data->multi = NULL; /* clear the association to this multi handle */
-
- /* make sure there's no pending message in the queue sent from this easy
- handle */
-
- for(e = multi->msglist->head; e; e = e->next) {
- struct Curl_message *msg = e->ptr;
-
- if(msg->extmsg.easy_handle == easy) {
- Curl_llist_remove(multi->msglist, e, NULL);
- /* there can only be one from this specific handle */
- break;
- }
- }
-
- /* make the previous node point to our next */
- if(data->prev)
- data->prev->next = data->next;
- else
- multi->easyp = data->next; /* point to first node */
-
- /* make our next point to our previous node */
- if(data->next)
- data->next->prev = data->prev;
- else
- multi->easylp = data->prev; /* point to last node */
-
- /* NOTE NOTE NOTE
- We do not touch the easy handle here! */
- multi->num_easy--; /* one less to care about now */
-
- update_timer(multi);
- return CURLM_OK;
-}
-
-CURL_STATIC bool Curl_multi_pipeline_enabled(const struct Curl_multi *multi)
-{
- return (multi && multi->pipelining_enabled) ? TRUE : FALSE;
-}
-
-CURL_STATIC void Curl_multi_handlePipeBreak(struct SessionHandle *data)
-{
- data->easy_conn = NULL;
-}
-
-static int waitconnect_getsock(struct connectdata *conn,
- curl_socket_t *sock,
- int numsocks)
-{
- int i;
- int s=0;
- int rc=0;
-
- if(!numsocks)
- return GETSOCK_BLANK;
-
- for(i=0; i<2; i++) {
- if(conn->tempsock[i] != CURL_SOCKET_BAD) {
- sock[s] = conn->tempsock[i];
- rc |= GETSOCK_WRITESOCK(s++);
- }
- }
-
- return rc;
-}
-
-static int waitproxyconnect_getsock(struct connectdata *conn,
- curl_socket_t *sock,
- int numsocks)
-{
- if(!numsocks)
- return GETSOCK_BLANK;
-
- sock[0] = conn->sock[FIRSTSOCKET];
-
- /* when we've sent a CONNECT to a proxy, we should rather wait for the
- socket to become readable to be able to get the response headers */
- if(conn->tunnel_state[FIRSTSOCKET] == TUNNEL_CONNECT)
- return GETSOCK_READSOCK(0);
-
- return GETSOCK_WRITESOCK(0);
-}
-
-static int domore_getsock(struct connectdata *conn,
- curl_socket_t *socks,
- int numsocks)
-{
- if(conn && conn->handler->domore_getsock)
- return conn->handler->domore_getsock(conn, socks, numsocks);
- return GETSOCK_BLANK;
-}
-
-/* returns bitmapped flags for this handle and its sockets */
-static int multi_getsock(struct SessionHandle *data,
- curl_socket_t *socks, /* points to numsocks number
- of sockets */
- int numsocks)
-{
- /* If the pipe broke, or if there's no connection left for this easy handle,
- then we MUST bail out now with no bitmask set. The no connection case can
- happen when this is called from curl_multi_remove_handle() =>
- singlesocket() => multi_getsock().
- */
- if(data->state.pipe_broke || !data->easy_conn)
- return 0;
-
- if(data->mstate > CURLM_STATE_CONNECT &&
- data->mstate < CURLM_STATE_COMPLETED) {
- /* Set up ownership correctly */
- data->easy_conn->data = data;
- }
-
- switch(data->mstate) {
- default:
-#if 0 /* switch back on these cases to get the compiler to check for all enums
- to be present */
- case CURLM_STATE_TOOFAST: /* returns 0, so will not select. */
- case CURLM_STATE_COMPLETED:
- case CURLM_STATE_MSGSENT:
- case CURLM_STATE_INIT:
- case CURLM_STATE_CONNECT:
- case CURLM_STATE_WAITDO:
- case CURLM_STATE_DONE:
- case CURLM_STATE_LAST:
- /* this will get called with CURLM_STATE_COMPLETED when a handle is
- removed */
-#endif
- return 0;
-
- case CURLM_STATE_WAITRESOLVE:
- return Curl_resolver_getsock(data->easy_conn, socks, numsocks);
-
- case CURLM_STATE_PROTOCONNECT:
- case CURLM_STATE_SENDPROTOCONNECT:
- return Curl_protocol_getsock(data->easy_conn, socks, numsocks);
-
- case CURLM_STATE_DO:
- case CURLM_STATE_DOING:
- return Curl_doing_getsock(data->easy_conn, socks, numsocks);
-
- case CURLM_STATE_WAITPROXYCONNECT:
- return waitproxyconnect_getsock(data->easy_conn, socks, numsocks);
-
- case CURLM_STATE_WAITCONNECT:
- return waitconnect_getsock(data->easy_conn, socks, numsocks);
-
- case CURLM_STATE_DO_MORE:
- return domore_getsock(data->easy_conn, socks, numsocks);
-
- case CURLM_STATE_DO_DONE: /* since is set after DO is completed, we switch
- to waiting for the same as the *PERFORM
- states */
- case CURLM_STATE_PERFORM:
- case CURLM_STATE_WAITPERFORM:
- return Curl_single_getsock(data->easy_conn, socks, numsocks);
- }
-
-}
-
-CURLMcode curl_multi_fdset(CURLM *multi_handle,
- fd_set *read_fd_set, fd_set *write_fd_set,
- fd_set *exc_fd_set, int *max_fd)
-{
- /* Scan through all the easy handles to get the file descriptors set.
- Some easy handles may not have connected to the remote host yet,
- and then we must make sure that is done. */
- struct Curl_multi *multi=(struct Curl_multi *)multi_handle;
- struct SessionHandle *data;
- int this_max_fd=-1;
- curl_socket_t sockbunch[MAX_SOCKSPEREASYHANDLE];
- int bitmap;
- int i;
- (void)exc_fd_set; /* not used */
-
- if(!GOOD_MULTI_HANDLE(multi))
- return CURLM_BAD_HANDLE;
-
- data=multi->easyp;
- while(data) {
- bitmap = multi_getsock(data, sockbunch, MAX_SOCKSPEREASYHANDLE);
-
- for(i=0; i< MAX_SOCKSPEREASYHANDLE; i++) {
- curl_socket_t s = CURL_SOCKET_BAD;
-
- if((bitmap & GETSOCK_READSOCK(i)) && VALID_SOCK((sockbunch[i]))) {
- FD_SET(sockbunch[i], read_fd_set);
- s = sockbunch[i];
- }
- if((bitmap & GETSOCK_WRITESOCK(i)) && VALID_SOCK((sockbunch[i]))) {
- FD_SET(sockbunch[i], write_fd_set);
- s = sockbunch[i];
- }
- if(s == CURL_SOCKET_BAD)
- /* this socket is unused, break out of loop */
- break;
- else {
- if((int)s > this_max_fd)
- this_max_fd = (int)s;
- }
- }
-
- data = data->next; /* check next handle */
- }
-
- *max_fd = this_max_fd;
-
- return CURLM_OK;
-}
-
-CURLMcode curl_multi_wait(CURLM *multi_handle,
- struct curl_waitfd extra_fds[],
- unsigned int extra_nfds,
- int timeout_ms,
- int *ret)
-{
- struct Curl_multi *multi=(struct Curl_multi *)multi_handle;
- struct SessionHandle *data;
- curl_socket_t sockbunch[MAX_SOCKSPEREASYHANDLE];
- int bitmap;
- unsigned int i;
- unsigned int nfds = 0;
- unsigned int curlfds;
- struct pollfd *ufds = NULL;
- long timeout_internal;
-
- if(!GOOD_MULTI_HANDLE(multi))
- return CURLM_BAD_HANDLE;
-
- /* If the internally desired timeout is actually shorter than requested from
- the outside, then use the shorter time! But only if the internal timer
- is actually larger than -1! */
- (void)multi_timeout(multi, &timeout_internal);
- if((timeout_internal >= 0) && (timeout_internal < (long)timeout_ms))
- timeout_ms = (int)timeout_internal;
-
- /* Count up how many fds we have from the multi handle */
- data=multi->easyp;
- while(data) {
- bitmap = multi_getsock(data, sockbunch, MAX_SOCKSPEREASYHANDLE);
-
- for(i=0; i< MAX_SOCKSPEREASYHANDLE; i++) {
- curl_socket_t s = CURL_SOCKET_BAD;
-
- if(bitmap & GETSOCK_READSOCK(i)) {
- ++nfds;
- s = sockbunch[i];
- }
- if(bitmap & GETSOCK_WRITESOCK(i)) {
- ++nfds;
- s = sockbunch[i];
- }
- if(s == CURL_SOCKET_BAD) {
- break;
- }
- }
-
- data = data->next; /* check next handle */
- }
-
- curlfds = nfds; /* number of internal file descriptors */
- nfds += extra_nfds; /* add the externally provided ones */
-
- if(nfds || extra_nfds) {
- ufds = malloc(nfds * sizeof(struct pollfd));
- if(!ufds)
- return CURLM_OUT_OF_MEMORY;
- }
- nfds = 0;
-
- /* only do the second loop if we found descriptors in the first stage run
- above */
-
- if(curlfds) {
- /* Add the curl handles to our pollfds first */
- data=multi->easyp;
- while(data) {
- bitmap = multi_getsock(data, sockbunch, MAX_SOCKSPEREASYHANDLE);
-
- for(i=0; i< MAX_SOCKSPEREASYHANDLE; i++) {
- curl_socket_t s = CURL_SOCKET_BAD;
-
- if(bitmap & GETSOCK_READSOCK(i)) {
- ufds[nfds].fd = sockbunch[i];
- ufds[nfds].events = POLLIN;
- ++nfds;
- s = sockbunch[i];
- }
- if(bitmap & GETSOCK_WRITESOCK(i)) {
- ufds[nfds].fd = sockbunch[i];
- ufds[nfds].events = POLLOUT;
- ++nfds;
- s = sockbunch[i];
- }
- if(s == CURL_SOCKET_BAD) {
- break;
- }
- }
-
- data = data->next; /* check next handle */
- }
- }
-
- /* Add external file descriptions from poll-like struct curl_waitfd */
- for(i = 0; i < extra_nfds; i++) {
- ufds[nfds].fd = extra_fds[i].fd;
- ufds[nfds].events = 0;
- if(extra_fds[i].events & CURL_WAIT_POLLIN)
- ufds[nfds].events |= POLLIN;
- if(extra_fds[i].events & CURL_WAIT_POLLPRI)
- ufds[nfds].events |= POLLPRI;
- if(extra_fds[i].events & CURL_WAIT_POLLOUT)
- ufds[nfds].events |= POLLOUT;
- ++nfds;
- }
-
- if(nfds) {
- /* wait... */
- infof(data, "Curl_poll(%d ds, %d ms)\n", nfds, timeout_ms);
- i = Curl_poll(ufds, nfds, timeout_ms);
-
- if(i) {
- unsigned int j;
- /* copy revents results from the poll to the curl_multi_wait poll
- struct, the bit values of the actual underlying poll() implementation
- may not be the same as the ones in the public libcurl API! */
- for(j = 0; j < extra_nfds; j++) {
- unsigned short mask = 0;
- unsigned r = ufds[curlfds + j].revents;
-
- if(r & POLLIN)
- mask |= CURL_WAIT_POLLIN;
- if(r & POLLOUT)
- mask |= CURL_WAIT_POLLOUT;
- if(r & POLLPRI)
- mask |= CURL_WAIT_POLLPRI;
-
- extra_fds[j].revents = mask;
- }
- }
- }
- else
- i = 0;
-
- free(ufds);
- if(ret)
- *ret = i;
- return CURLM_OK;
-}
-
-static CURLMcode multi_runsingle(struct Curl_multi *multi,
- struct timeval now,
- struct SessionHandle *data)
-{
- struct Curl_message *msg = NULL;
- bool connected;
- bool async;
- bool protocol_connect = FALSE;
- bool dophase_done = FALSE;
- bool done = FALSE;
- CURLMcode rc;
- CURLcode result = CURLE_OK;
- struct SingleRequest *k;
- long timeout_ms;
- int control;
-
- if(!GOOD_EASY_HANDLE(data))
- return CURLM_BAD_EASY_HANDLE;
-
- do {
- bool disconnect_conn = FALSE;
- rc = CURLM_OK;
-
- /* Handle the case when the pipe breaks, i.e., the connection
- we're using gets cleaned up and we're left with nothing. */
- if(data->state.pipe_broke) {
- infof(data, "Pipe broke: handle %p, url = %s\n",
- (void *)data, data->state.path);
-
- if(data->mstate < CURLM_STATE_COMPLETED) {
- /* Head back to the CONNECT state */
- multistate(data, CURLM_STATE_CONNECT);
- rc = CURLM_CALL_MULTI_PERFORM;
- result = CURLE_OK;
- }
-
- data->state.pipe_broke = FALSE;
- data->easy_conn = NULL;
- continue;
- }
-
- if(!data->easy_conn &&
- data->mstate > CURLM_STATE_CONNECT &&
- data->mstate < CURLM_STATE_DONE) {
- /* In all these states, the code will blindly access 'data->easy_conn'
- so this is precaution that it isn't NULL. And it silences static
- analyzers. */
- failf(data, "In state %d with no easy_conn, bail out!\n", data->mstate);
- return CURLM_INTERNAL_ERROR;
- }
-
- if(data->easy_conn && data->mstate > CURLM_STATE_CONNECT &&
- data->mstate < CURLM_STATE_COMPLETED)
- /* Make sure we set the connection's current owner */
- data->easy_conn->data = data;
-
- if(data->easy_conn &&
- (data->mstate >= CURLM_STATE_CONNECT) &&
- (data->mstate < CURLM_STATE_COMPLETED)) {
- /* we need to wait for the connect state as only then is the start time
- stored, but we must not check already completed handles */
-
- timeout_ms = Curl_timeleft(data, &now,
- (data->mstate <= CURLM_STATE_WAITDO)?
- TRUE:FALSE);
-
- if(timeout_ms < 0) {
- /* Handle timed out */
- if(data->mstate == CURLM_STATE_WAITRESOLVE)
- failf(data, "Resolving timed out after %ld milliseconds",
- Curl_tvdiff(now, data->progress.t_startsingle));
- else if(data->mstate == CURLM_STATE_WAITCONNECT)
- failf(data, "Connection timed out after %ld milliseconds",
- Curl_tvdiff(now, data->progress.t_startsingle));
- else {
- k = &data->req;
- if(k->size != -1) {
- failf(data, "Operation timed out after %ld milliseconds with %"
- CURL_FORMAT_CURL_OFF_T " out of %"
- CURL_FORMAT_CURL_OFF_T " bytes received",
- Curl_tvdiff(k->now, data->progress.t_startsingle),
- k->bytecount, k->size);
- }
- else {
- failf(data, "Operation timed out after %ld milliseconds with %"
- CURL_FORMAT_CURL_OFF_T " bytes received",
- Curl_tvdiff(now, data->progress.t_startsingle),
- k->bytecount);
- }
- }
-
- /* Force connection closed if the connection has indeed been used */
- if(data->mstate > CURLM_STATE_DO) {
- connclose(data->easy_conn, "Disconnected with pending data");
- disconnect_conn = TRUE;
- }
- result = CURLE_OPERATION_TIMEDOUT;
- (void)Curl_done(&data->easy_conn, result, TRUE);
- /* Skip the statemachine and go directly to error handling section. */
- goto statemachine_end;
- }
- }
-
- switch(data->mstate) {
- case CURLM_STATE_INIT:
- /* init this transfer. */
- result=Curl_pretransfer(data);
-
- if(!result) {
- /* after init, go CONNECT */
- multistate(data, CURLM_STATE_CONNECT);
- Curl_pgrsTime(data, TIMER_STARTOP);
- rc = CURLM_CALL_MULTI_PERFORM;
- }
- break;
-
- case CURLM_STATE_CONNECT_PEND:
- /* We will stay here until there is a connection available. Then
- we try again in the CURLM_STATE_CONNECT state. */
- break;
-
- case CURLM_STATE_CONNECT:
- /* Connect. We want to get a connection identifier filled in. */
- Curl_pgrsTime(data, TIMER_STARTSINGLE);
- result = Curl_connect(data, &data->easy_conn,
- &async, &protocol_connect);
- if(CURLE_NO_CONNECTION_AVAILABLE == result) {
- /* There was no connection available. We will go to the pending
- state and wait for an available connection. */
- multistate(data, CURLM_STATE_CONNECT_PEND);
-
- /* add this handle to the list of connect-pending handles */
- if(!Curl_llist_insert_next(multi->pending, multi->pending->tail, data))
- result = CURLE_OUT_OF_MEMORY;
- else
- result = CURLE_OK;
- break;
- }
-
- if(!result) {
- /* Add this handle to the send or pend pipeline */
- result = Curl_add_handle_to_pipeline(data, data->easy_conn);
- if(result)
- disconnect_conn = TRUE;
- else {
- if(async)
- /* We're now waiting for an asynchronous name lookup */
- multistate(data, CURLM_STATE_WAITRESOLVE);
- else {
- /* after the connect has been sent off, go WAITCONNECT unless the
- protocol connect is already done and we can go directly to
- WAITDO or DO! */
- rc = CURLM_CALL_MULTI_PERFORM;
-
- if(protocol_connect)
- multistate(data, multi->pipelining_enabled?
- CURLM_STATE_WAITDO:CURLM_STATE_DO);
- else {
-#ifndef CURL_DISABLE_HTTP
- if(data->easy_conn->tunnel_state[FIRSTSOCKET] == TUNNEL_CONNECT)
- multistate(data, CURLM_STATE_WAITPROXYCONNECT);
- else
-#endif
- multistate(data, CURLM_STATE_WAITCONNECT);
- }
- }
- }
- }
- break;
-
- case CURLM_STATE_WAITRESOLVE:
- /* awaiting an asynch name resolve to complete */
- {
- struct Curl_dns_entry *dns = NULL;
- struct connectdata *conn = data->easy_conn;
-
- /* check if we have the name resolved by now */
- dns = Curl_fetch_addr(conn, conn->host.name, (int)conn->port);
-
- if(dns) {
-#ifdef CURLRES_ASYNCH
- conn->async.dns = dns;
- conn->async.done = TRUE;
-#endif
- result = CURLE_OK;
- infof(data, "Hostname was found in DNS cache\n");
- }
-
- if(!dns)
- result = Curl_resolver_is_resolved(data->easy_conn, &dns);
-
- /* Update sockets here, because the socket(s) may have been
- closed and the application thus needs to be told, even if it
- is likely that the same socket(s) will again be used further
- down. If the name has not yet been resolved, it is likely
- that new sockets have been opened in an attempt to contact
- another resolver. */
- singlesocket(multi, data);
-
- if(dns) {
- /* Perform the next step in the connection phase, and then move on
- to the WAITCONNECT state */
- result = Curl_async_resolved(data->easy_conn, &protocol_connect);
-
- if(result)
- /* if Curl_async_resolved() returns failure, the connection struct
- is already freed and gone */
- data->easy_conn = NULL; /* no more connection */
- else {
- /* call again please so that we get the next socket setup */
- rc = CURLM_CALL_MULTI_PERFORM;
- if(protocol_connect)
- multistate(data, multi->pipelining_enabled?
- CURLM_STATE_WAITDO:CURLM_STATE_DO);
- else {
-#ifndef CURL_DISABLE_HTTP
- if(data->easy_conn->tunnel_state[FIRSTSOCKET] == TUNNEL_CONNECT)
- multistate(data, CURLM_STATE_WAITPROXYCONNECT);
- else
-#endif
- multistate(data, CURLM_STATE_WAITCONNECT);
- }
- }
- }
-
- if(result) {
- /* failure detected */
- disconnect_conn = TRUE;
- break;
- }
- }
- break;
-
-#ifndef CURL_DISABLE_HTTP
- case CURLM_STATE_WAITPROXYCONNECT:
- /* this is HTTP-specific, but sending CONNECT to a proxy is HTTP... */
- result = Curl_http_connect(data->easy_conn, &protocol_connect);
-
- rc = CURLM_CALL_MULTI_PERFORM;
- if(data->easy_conn->bits.proxy_connect_closed) {
- /* connect back to proxy again */
- result = CURLE_OK;
- multistate(data, CURLM_STATE_CONNECT);
- }
- else if(!result) {
- if(data->easy_conn->tunnel_state[FIRSTSOCKET] == TUNNEL_COMPLETE)
- /* initiate protocol connect phase */
- multistate(data, CURLM_STATE_SENDPROTOCONNECT);
- }
- break;
-#endif
-
- case CURLM_STATE_WAITCONNECT:
- /* awaiting a completion of an asynch TCP connect */
- result = Curl_is_connected(data->easy_conn, FIRSTSOCKET, &connected);
- if(connected && !result) {
- rc = CURLM_CALL_MULTI_PERFORM;
- multistate(data, data->easy_conn->bits.tunnel_proxy?
- CURLM_STATE_WAITPROXYCONNECT:
- CURLM_STATE_SENDPROTOCONNECT);
- }
- else if(result) {
- /* failure detected */
- /* Just break, the cleaning up is handled all in one place */
- disconnect_conn = TRUE;
- break;
- }
- break;
-
- case CURLM_STATE_SENDPROTOCONNECT:
- result = Curl_protocol_connect(data->easy_conn, &protocol_connect);
- if(!protocol_connect)
- /* switch to waiting state */
- multistate(data, CURLM_STATE_PROTOCONNECT);
- else if(!result) {
- /* protocol connect has completed, go WAITDO or DO */
- multistate(data, multi->pipelining_enabled?
- CURLM_STATE_WAITDO:CURLM_STATE_DO);
- rc = CURLM_CALL_MULTI_PERFORM;
- }
- else if(result) {
- /* failure detected */
- Curl_posttransfer(data);
- Curl_done(&data->easy_conn, result, TRUE);
- disconnect_conn = TRUE;
- }
- break;
-
- case CURLM_STATE_PROTOCONNECT:
- /* protocol-specific connect phase */
- result = Curl_protocol_connecting(data->easy_conn, &protocol_connect);
- if(!result && protocol_connect) {
- /* after the connect has completed, go WAITDO or DO */
- multistate(data, multi->pipelining_enabled?
- CURLM_STATE_WAITDO:CURLM_STATE_DO);
- rc = CURLM_CALL_MULTI_PERFORM;
- }
- else if(result) {
- /* failure detected */
- Curl_posttransfer(data);
- Curl_done(&data->easy_conn, result, TRUE);
- disconnect_conn = TRUE;
- }
- break;
-
- case CURLM_STATE_WAITDO:
- /* Wait for our turn to DO when we're pipelining requests */
-#ifdef DEBUGBUILD
- infof(data, "WAITDO: Conn %ld send pipe %zu inuse %s athead %s\n",
- data->easy_conn->connection_id,
- data->easy_conn->send_pipe->size,
- data->easy_conn->writechannel_inuse?"TRUE":"FALSE",
- isHandleAtHead(data,
- data->easy_conn->send_pipe)?"TRUE":"FALSE");
-#endif
- if(!data->easy_conn->writechannel_inuse &&
- isHandleAtHead(data,
- data->easy_conn->send_pipe)) {
- /* Grab the channel */
- data->easy_conn->writechannel_inuse = TRUE;
- multistate(data, CURLM_STATE_DO);
- rc = CURLM_CALL_MULTI_PERFORM;
- }
- break;
-
- case CURLM_STATE_DO:
- if(data->set.connect_only) {
- /* keep connection open for application to use the socket */
- connkeep(data->easy_conn, "CONNECT_ONLY");
- multistate(data, CURLM_STATE_DONE);
- result = CURLE_OK;
- rc = CURLM_CALL_MULTI_PERFORM;
- }
- else {
- /* Perform the protocol's DO action */
- result = Curl_do(&data->easy_conn, &dophase_done);
-
- /* When Curl_do() returns failure, data->easy_conn might be NULL! */
-
- if(!result) {
- if(!dophase_done) {
- /* some steps needed for wildcard matching */
- if(data->set.wildcardmatch) {
- struct WildcardData *wc = &data->wildcard;
- if(wc->state == CURLWC_DONE || wc->state == CURLWC_SKIP) {
- /* skip some states if it is important */
- Curl_done(&data->easy_conn, CURLE_OK, FALSE);
- multistate(data, CURLM_STATE_DONE);
- rc = CURLM_CALL_MULTI_PERFORM;
- break;
- }
- }
- /* DO was not completed in one function call, we must continue
- DOING... */
- multistate(data, CURLM_STATE_DOING);
- rc = CURLM_OK;
- }
-
- /* after DO, go DO_DONE... or DO_MORE */
- else if(data->easy_conn->bits.do_more) {
- /* we're supposed to do more, but we need to sit down, relax
- and wait a little while first */
- multistate(data, CURLM_STATE_DO_MORE);
- rc = CURLM_OK;
- }
- else {
- /* we're done with the DO, now DO_DONE */
- multistate(data, CURLM_STATE_DO_DONE);
- rc = CURLM_CALL_MULTI_PERFORM;
- }
- }
- else if((CURLE_SEND_ERROR == result) &&
- data->easy_conn->bits.reuse) {
- /*
- * In this situation, a connection that we were trying to use
- * may have unexpectedly died. If possible, send the connection
- * back to the CONNECT phase so we can try again.
- */
- char *newurl = NULL;
- followtype follow=FOLLOW_NONE;
- CURLcode drc;
- bool retry = FALSE;
-
- drc = Curl_retry_request(data->easy_conn, &newurl);
- if(drc) {
- /* a failure here pretty much implies an out of memory */
- result = drc;
- disconnect_conn = TRUE;
- }
- else
- retry = (newurl)?TRUE:FALSE;
-
- Curl_posttransfer(data);
- drc = Curl_done(&data->easy_conn, result, FALSE);
-
- /* When set to retry the connection, we must to go back to
- * the CONNECT state */
- if(retry) {
- if(!drc || (drc == CURLE_SEND_ERROR)) {
- follow = FOLLOW_RETRY;
- drc = Curl_follow(data, newurl, follow);
- if(!drc) {
- multistate(data, CURLM_STATE_CONNECT);
- rc = CURLM_CALL_MULTI_PERFORM;
- result = CURLE_OK;
- }
- else {
- /* Follow failed */
- result = drc;
- free(newurl);
- }
- }
- else {
- /* done didn't return OK or SEND_ERROR */
- result = drc;
- free(newurl);
- }
- }
- else {
- /* Have error handler disconnect conn if we can't retry */
- disconnect_conn = TRUE;
- free(newurl);
- }
- }
- else {
- /* failure detected */
- Curl_posttransfer(data);
- if(data->easy_conn)
- Curl_done(&data->easy_conn, result, FALSE);
- disconnect_conn = TRUE;
- }
- }
- break;
-
- case CURLM_STATE_DOING:
- /* we continue DOING until the DO phase is complete */
- result = Curl_protocol_doing(data->easy_conn,
- &dophase_done);
- if(!result) {
- if(dophase_done) {
- /* after DO, go DO_DONE or DO_MORE */
- multistate(data, data->easy_conn->bits.do_more?
- CURLM_STATE_DO_MORE:
- CURLM_STATE_DO_DONE);
- rc = CURLM_CALL_MULTI_PERFORM;
- } /* dophase_done */
- }
- else {
- /* failure detected */
- Curl_posttransfer(data);
- Curl_done(&data->easy_conn, result, FALSE);
- disconnect_conn = TRUE;
- }
- break;
-
- case CURLM_STATE_DO_MORE:
- /*
- * When we are connected, DO MORE and then go DO_DONE
- */
- result = Curl_do_more(data->easy_conn, &control);
-
- /* No need to remove this handle from the send pipeline here since that
- is done in Curl_done() */
- if(!result) {
- if(control) {
- /* if positive, advance to DO_DONE
- if negative, go back to DOING */
- multistate(data, control==1?
- CURLM_STATE_DO_DONE:
- CURLM_STATE_DOING);
- rc = CURLM_CALL_MULTI_PERFORM;
- }
- else
- /* stay in DO_MORE */
- rc = CURLM_OK;
- }
- else {
- /* failure detected */
- Curl_posttransfer(data);
- Curl_done(&data->easy_conn, result, FALSE);
- disconnect_conn = TRUE;
- }
- break;
-
- case CURLM_STATE_DO_DONE:
- /* Move ourselves from the send to recv pipeline */
- Curl_move_handle_from_send_to_recv_pipe(data, data->easy_conn);
- /* Check if we can move pending requests to send pipe */
- Curl_multi_process_pending_handles(multi);
-
- /* Only perform the transfer if there's a good socket to work with.
- Having both BAD is a signal to skip immediately to DONE */
- if((data->easy_conn->sockfd != CURL_SOCKET_BAD) ||
- (data->easy_conn->writesockfd != CURL_SOCKET_BAD))
- multistate(data, CURLM_STATE_WAITPERFORM);
- else
- multistate(data, CURLM_STATE_DONE);
- rc = CURLM_CALL_MULTI_PERFORM;
- break;
-
- case CURLM_STATE_WAITPERFORM:
- /* Wait for our turn to PERFORM */
- if(!data->easy_conn->readchannel_inuse &&
- isHandleAtHead(data,
- data->easy_conn->recv_pipe)) {
- /* Grab the channel */
- data->easy_conn->readchannel_inuse = TRUE;
- multistate(data, CURLM_STATE_PERFORM);
- rc = CURLM_CALL_MULTI_PERFORM;
- }
-#ifdef DEBUGBUILD
- else {
- infof(data, "WAITPERFORM: Conn %ld recv pipe %zu inuse %s athead %s\n",
- data->easy_conn->connection_id,
- data->easy_conn->recv_pipe->size,
- data->easy_conn->readchannel_inuse?"TRUE":"FALSE",
- isHandleAtHead(data,
- data->easy_conn->recv_pipe)?"TRUE":"FALSE");
- }
-#endif
- break;
-
- case CURLM_STATE_TOOFAST: /* limit-rate exceeded in either direction */
- /* if both rates are within spec, resume transfer */
- if(Curl_pgrsUpdate(data->easy_conn))
- result = CURLE_ABORTED_BY_CALLBACK;
- else
- result = Curl_speedcheck(data, now);
-
- if(( (data->set.max_send_speed == 0) ||
- (data->progress.ulspeed < data->set.max_send_speed )) &&
- ( (data->set.max_recv_speed == 0) ||
- (data->progress.dlspeed < data->set.max_recv_speed)))
- multistate(data, CURLM_STATE_PERFORM);
- break;
-
- case CURLM_STATE_PERFORM:
- {
- char *newurl = NULL;
- bool retry = FALSE;
-
- /* check if over send speed */
- if((data->set.max_send_speed > 0) &&
- (data->progress.ulspeed > data->set.max_send_speed)) {
- int buffersize;
-
- multistate(data, CURLM_STATE_TOOFAST);
-
- /* calculate upload rate-limitation timeout. */
- buffersize = (int)(data->set.buffer_size ?
- data->set.buffer_size : BUFSIZE);
- timeout_ms = Curl_sleep_time(data->set.max_send_speed,
- data->progress.ulspeed, buffersize);
- Curl_expire_latest(data, timeout_ms);
- break;
- }
-
- /* check if over recv speed */
- if((data->set.max_recv_speed > 0) &&
- (data->progress.dlspeed > data->set.max_recv_speed)) {
- int buffersize;
-
- multistate(data, CURLM_STATE_TOOFAST);
-
- /* Calculate download rate-limitation timeout. */
- buffersize = (int)(data->set.buffer_size ?
- data->set.buffer_size : BUFSIZE);
- timeout_ms = Curl_sleep_time(data->set.max_recv_speed,
- data->progress.dlspeed, buffersize);
- Curl_expire_latest(data, timeout_ms);
- break;
- }
-
- /* read/write data if it is ready to do so */
- result = Curl_readwrite(data->easy_conn, &done);
-
- k = &data->req;
-
- if(!(k->keepon & KEEP_RECV)) {
- /* We're done receiving */
- data->easy_conn->readchannel_inuse = FALSE;
- }
-
- if(!(k->keepon & KEEP_SEND)) {
- /* We're done sending */
- data->easy_conn->writechannel_inuse = FALSE;
- }
-
- if(done || (result == CURLE_RECV_ERROR)) {
- /* If CURLE_RECV_ERROR happens early enough, we assume it was a race
- * condition and the server closed the re-used connection exactly when
- * we wanted to use it, so figure out if that is indeed the case.
- */
- CURLcode ret = Curl_retry_request(data->easy_conn, &newurl);
- if(!ret)
- retry = (newurl)?TRUE:FALSE;
-
- if(retry) {
- /* if we are to retry, set the result to OK and consider the
- request as done */
- result = CURLE_OK;
- done = TRUE;
- }
- }
-
- if(result) {
- /*
- * The transfer phase returned error, we mark the connection to get
- * closed to prevent being re-used. This is because we can't possibly
- * know if the connection is in a good shape or not now. Unless it is
- * a protocol which uses two "channels" like FTP, as then the error
- * happened in the data connection.
- */
-
- if(!(data->easy_conn->handler->flags & PROTOPT_DUAL))
- connclose(data->easy_conn, "Transfer returned error");
-
- Curl_posttransfer(data);
- Curl_done(&data->easy_conn, result, FALSE);
- }
- else if(done) {
- followtype follow=FOLLOW_NONE;
-
- /* call this even if the readwrite function returned error */
- Curl_posttransfer(data);
-
- /* we're no longer receiving */
- Curl_removeHandleFromPipeline(data, data->easy_conn->recv_pipe);
-
- /* expire the new receiving pipeline head */
- if(data->easy_conn->recv_pipe->head)
- Curl_expire_latest(data->easy_conn->recv_pipe->head->ptr, 1);
-
- /* Check if we can move pending requests to send pipe */
- Curl_multi_process_pending_handles(multi);
-
- /* When we follow redirects or is set to retry the connection, we must
- to go back to the CONNECT state */
- if(data->req.newurl || retry) {
- if(!retry) {
- /* if the URL is a follow-location and not just a retried request
- then figure out the URL here */
- free(newurl);
- newurl = data->req.newurl;
- data->req.newurl = NULL;
- follow = FOLLOW_REDIR;
- }
- else
- follow = FOLLOW_RETRY;
- result = Curl_done(&data->easy_conn, CURLE_OK, FALSE);
- if(!result) {
- result = Curl_follow(data, newurl, follow);
- if(!result) {
- multistate(data, CURLM_STATE_CONNECT);
- rc = CURLM_CALL_MULTI_PERFORM;
- newurl = NULL; /* handed over the memory ownership to
- Curl_follow(), make sure we don't free() it
- here */
- }
- }
- }
- else {
- /* after the transfer is done, go DONE */
-
- /* but first check to see if we got a location info even though we're
- not following redirects */
- if(data->req.location) {
- free(newurl);
- newurl = data->req.location;
- data->req.location = NULL;
- result = Curl_follow(data, newurl, FOLLOW_FAKE);
- if(!result)
- newurl = NULL; /* allocation was handed over Curl_follow() */
- else
- disconnect_conn = TRUE;
- }
-
- multistate(data, CURLM_STATE_DONE);
- rc = CURLM_CALL_MULTI_PERFORM;
- }
- }
-
- free(newurl);
- break;
- }
-
- case CURLM_STATE_DONE:
- /* this state is highly transient, so run another loop after this */
- rc = CURLM_CALL_MULTI_PERFORM;
-
- if(data->easy_conn) {
- CURLcode res;
-
- /* Remove ourselves from the receive pipeline, if we are there. */
- Curl_removeHandleFromPipeline(data, data->easy_conn->recv_pipe);
- /* Check if we can move pending requests to send pipe */
- Curl_multi_process_pending_handles(multi);
-
- /* post-transfer command */
- res = Curl_done(&data->easy_conn, result, FALSE);
-
- /* allow a previously set error code take precedence */
- if(!result)
- result = res;
-
- /*
- * If there are other handles on the pipeline, Curl_done won't set
- * easy_conn to NULL. In such a case, curl_multi_remove_handle() can
- * access free'd data, if the connection is free'd and the handle
- * removed before we perform the processing in CURLM_STATE_COMPLETED
- */
- if(data->easy_conn)
- data->easy_conn = NULL;
- }
-
- if(data->set.wildcardmatch) {
- if(data->wildcard.state != CURLWC_DONE) {
- /* if a wildcard is set and we are not ending -> lets start again
- with CURLM_STATE_INIT */
- multistate(data, CURLM_STATE_INIT);
- break;
- }
- }
-
- /* after we have DONE what we're supposed to do, go COMPLETED, and
- it doesn't matter what the Curl_done() returned! */
- multistate(data, CURLM_STATE_COMPLETED);
- break;
-
- case CURLM_STATE_COMPLETED:
- /* this is a completed transfer, it is likely to still be connected */
-
- /* This node should be delinked from the list now and we should post
- an information message that we are complete. */
-
- /* Important: reset the conn pointer so that we don't point to memory
- that could be freed anytime */
- data->easy_conn = NULL;
-
- Curl_expire(data, 0); /* stop all timers */
- break;
-
- case CURLM_STATE_MSGSENT:
- data->result = result;
- return CURLM_OK; /* do nothing */
-
- default:
- return CURLM_INTERNAL_ERROR;
- }
- statemachine_end:
-
- if(data->mstate < CURLM_STATE_COMPLETED) {
- if(result) {
- /*
- * If an error was returned, and we aren't in completed state now,
- * then we go to completed and consider this transfer aborted.
- */
-
- /* NOTE: no attempt to disconnect connections must be made
- in the case blocks above - cleanup happens only here */
-
- data->state.pipe_broke = FALSE;
-
- /* Check if we can move pending requests to send pipe */
- Curl_multi_process_pending_handles(multi);
-
- if(data->easy_conn) {
- /* if this has a connection, unsubscribe from the pipelines */
- data->easy_conn->writechannel_inuse = FALSE;
- data->easy_conn->readchannel_inuse = FALSE;
- Curl_removeHandleFromPipeline(data, data->easy_conn->send_pipe);
- Curl_removeHandleFromPipeline(data, data->easy_conn->recv_pipe);
-
- if(disconnect_conn) {
- /* Don't attempt to send data over a connection that timed out */
- bool dead_connection = result == CURLE_OPERATION_TIMEDOUT;
- /* disconnect properly */
- Curl_disconnect(data->easy_conn, dead_connection);
-
- /* This is where we make sure that the easy_conn pointer is reset.
- We don't have to do this in every case block above where a
- failure is detected */
- data->easy_conn = NULL;
- }
- }
- else if(data->mstate == CURLM_STATE_CONNECT) {
- /* Curl_connect() failed */
- (void)Curl_posttransfer(data);
- }
-
- multistate(data, CURLM_STATE_COMPLETED);
- }
- /* if there's still a connection to use, call the progress function */
- else if(data->easy_conn && Curl_pgrsUpdate(data->easy_conn)) {
- /* aborted due to progress callback return code must close the
- connection */
- result = CURLE_ABORTED_BY_CALLBACK;
- connclose(data->easy_conn, "Aborted by callback");
-
- /* if not yet in DONE state, go there, otherwise COMPLETED */
- multistate(data, (data->mstate < CURLM_STATE_DONE)?
- CURLM_STATE_DONE: CURLM_STATE_COMPLETED);
- rc = CURLM_CALL_MULTI_PERFORM;
- }
- }
-
- if(CURLM_STATE_COMPLETED == data->mstate) {
- /* now fill in the Curl_message with this info */
- msg = &data->msg;
-
- msg->extmsg.msg = CURLMSG_DONE;
- msg->extmsg.easy_handle = data;
- msg->extmsg.data.result = result;
-
- rc = multi_addmsg(multi, msg);
-
- multistate(data, CURLM_STATE_MSGSENT);
- }
- } while(rc == CURLM_CALL_MULTI_PERFORM);
-
- data->result = result;
-
-
- return rc;
-}
-
-
-CURLMcode curl_multi_perform(CURLM *multi_handle, int *running_handles)
-{
- struct Curl_multi *multi=(struct Curl_multi *)multi_handle;
- struct SessionHandle *data;
- CURLMcode returncode=CURLM_OK;
- struct Curl_tree *t;
- struct timeval now = Curl_tvnow();
-
- if(!GOOD_MULTI_HANDLE(multi))
- return CURLM_BAD_HANDLE;
-
- data=multi->easyp;
- while(data) {
- CURLMcode result;
- struct WildcardData *wc = &data->wildcard;
- SIGPIPE_VARIABLE(pipe_st);
-
- if(data->set.wildcardmatch) {
- if(!wc->filelist) {
- CURLcode ret = Curl_wildcard_init(wc); /* init wildcard structures */
- if(ret)
- return CURLM_OUT_OF_MEMORY;
- }
- }
-
- sigpipe_ignore(data, &pipe_st);
- result = multi_runsingle(multi, now, data);
- sigpipe_restore(&pipe_st);
-
- if(data->set.wildcardmatch) {
- /* destruct wildcard structures if it is needed */
- if(wc->state == CURLWC_DONE || result)
- Curl_wildcard_dtor(wc);
- }
-
- if(result)
- returncode = result;
-
- data = data->next; /* operate on next handle */
- }
-
- /*
- * Simply remove all expired timers from the splay since handles are dealt
- * with unconditionally by this function and curl_multi_timeout() requires
- * that already passed/handled expire times are removed from the splay.
- *
- * It is important that the 'now' value is set at the entry of this function
- * and not for the current time as it may have ticked a little while since
- * then and then we risk this loop to remove timers that actually have not
- * been handled!
- */
- do {
- multi->timetree = Curl_splaygetbest(now, multi->timetree, &t);
- if(t)
- /* the removed may have another timeout in queue */
- (void)add_next_timeout(now, multi, t->payload);
-
- } while(t);
-
- *running_handles = multi->num_alive;
-
- if(CURLM_OK >= returncode)
- update_timer(multi);
-
- return returncode;
-}
-
-static void close_all_connections(struct Curl_multi *multi)
-{
- struct connectdata *conn;
-
- conn = Curl_conncache_find_first_connection(multi->conn_cache);
- while(conn) {
- SIGPIPE_VARIABLE(pipe_st);
- conn->data = multi->closure_handle;
-
- sigpipe_ignore(conn->data, &pipe_st);
- /* This will remove the connection from the cache */
- (void)Curl_disconnect(conn, FALSE);
- sigpipe_restore(&pipe_st);
-
- conn = Curl_conncache_find_first_connection(multi->conn_cache);
- }
-}
-
-CURLMcode curl_multi_cleanup(CURLM *multi_handle)
-{
- struct Curl_multi *multi=(struct Curl_multi *)multi_handle;
- struct SessionHandle *data;
- struct SessionHandle *nextdata;
-
- if(GOOD_MULTI_HANDLE(multi)) {
- bool restore_pipe = FALSE;
- SIGPIPE_VARIABLE(pipe_st);
-
- multi->type = 0; /* not good anymore */
-
- /* Close all the connections in the connection cache */
- close_all_connections(multi);
-
- if(multi->closure_handle) {
- sigpipe_ignore(multi->closure_handle, &pipe_st);
- restore_pipe = TRUE;
-
- multi->closure_handle->dns.hostcache = multi->hostcache;
- Curl_hostcache_clean(multi->closure_handle,
- multi->closure_handle->dns.hostcache);
-
- Curl_close(multi->closure_handle);
- }
-
- Curl_hash_destroy(multi->sockhash);
- Curl_conncache_destroy(multi->conn_cache);
- Curl_llist_destroy(multi->msglist, NULL);
- Curl_llist_destroy(multi->pending, NULL);
-
- /* remove all easy handles */
- data = multi->easyp;
- while(data) {
- nextdata=data->next;
- if(data->dns.hostcachetype == HCACHE_MULTI) {
- /* clear out the usage of the shared DNS cache */
- Curl_hostcache_clean(data, data->dns.hostcache);
- data->dns.hostcache = NULL;
- data->dns.hostcachetype = HCACHE_NONE;
- }
-
- /* Clear the pointer to the connection cache */
- data->state.conn_cache = NULL;
- data->multi = NULL; /* clear the association */
-
- data = nextdata;
- }
-
- Curl_hash_destroy(multi->hostcache);
-
- /* Free the blacklists by setting them to NULL */
- Curl_pipeline_set_site_blacklist(NULL, &multi->pipelining_site_bl);
- Curl_pipeline_set_server_blacklist(NULL, &multi->pipelining_server_bl);
-
- free(multi);
- if(restore_pipe)
- sigpipe_restore(&pipe_st);
-
- return CURLM_OK;
- }
- else
- return CURLM_BAD_HANDLE;
-}
-
-/*
- * curl_multi_info_read()
- *
- * This function is the primary way for a multi/multi_socket application to
- * figure out if a transfer has ended. We MUST make this function as fast as
- * possible as it will be polled frequently and we MUST NOT scan any lists in
- * here to figure out things. We must scale fine to thousands of handles and
- * beyond. The current design is fully O(1).
- */
-
-CURLMsg *curl_multi_info_read(CURLM *multi_handle, int *msgs_in_queue)
-{
- struct Curl_multi *multi=(struct Curl_multi *)multi_handle;
- struct Curl_message *msg;
-
- *msgs_in_queue = 0; /* default to none */
-
- if(GOOD_MULTI_HANDLE(multi) && Curl_llist_count(multi->msglist)) {
- /* there is one or more messages in the list */
- struct curl_llist_element *e;
-
- /* extract the head of the list to return */
- e = multi->msglist->head;
-
- msg = e->ptr;
-
- /* remove the extracted entry */
- Curl_llist_remove(multi->msglist, e, NULL);
-
- *msgs_in_queue = curlx_uztosi(Curl_llist_count(multi->msglist));
-
- return &msg->extmsg;
- }
- else
- return NULL;
-}
-
-/*
- * singlesocket() checks what sockets we deal with and their "action state"
- * and if we have a different state in any of those sockets from last time we
- * call the callback accordingly.
- */
-static void singlesocket(struct Curl_multi *multi,
- struct SessionHandle *data)
-{
- curl_socket_t socks[MAX_SOCKSPEREASYHANDLE];
- int i;
- struct Curl_sh_entry *entry;
- curl_socket_t s;
- int num;
- unsigned int curraction;
- bool remove_sock_from_hash;
-
- for(i=0; i< MAX_SOCKSPEREASYHANDLE; i++)
- socks[i] = CURL_SOCKET_BAD;
-
- /* Fill in the 'current' struct with the state as it is now: what sockets to
- supervise and for what actions */
- curraction = multi_getsock(data, socks, MAX_SOCKSPEREASYHANDLE);
-
- /* We have 0 .. N sockets already and we get to know about the 0 .. M
- sockets we should have from now on. Detect the differences, remove no
- longer supervised ones and add new ones */
-
- /* walk over the sockets we got right now */
- for(i=0; (i< MAX_SOCKSPEREASYHANDLE) &&
- (curraction & (GETSOCK_READSOCK(i) | GETSOCK_WRITESOCK(i)));
- i++) {
- int action = CURL_POLL_NONE;
-
- s = socks[i];
-
- /* get it from the hash */
- entry = Curl_hash_pick(multi->sockhash, (char *)&s, sizeof(s));
-
- if(curraction & GETSOCK_READSOCK(i))
- action |= CURL_POLL_IN;
- if(curraction & GETSOCK_WRITESOCK(i))
- action |= CURL_POLL_OUT;
-
- if(entry) {
- /* yeps, already present so check if it has the same action set */
- if(entry->action == action)
- /* same, continue */
- continue;
- }
- else {
- /* this is a socket we didn't have before, add it! */
- entry = sh_addentry(multi->sockhash, s, data);
- if(!entry)
- /* fatal */
- return;
- }
-
- /* we know (entry != NULL) at this point, see the logic above */
- if(multi->socket_cb)
- multi->socket_cb(data,
- s,
- action,
- multi->socket_userp,
- entry->socketp);
-
- entry->action = action; /* store the current action state */
- }
-
- num = i; /* number of sockets */
-
- /* when we've walked over all the sockets we should have right now, we must
- make sure to detect sockets that are removed */
- for(i=0; i< data->numsocks; i++) {
- int j;
- s = data->sockets[i];
- for(j=0; j<num; j++) {
- if(s == socks[j]) {
- /* this is still supervised */
- s = CURL_SOCKET_BAD;
- break;
- }
- }
- if(s != CURL_SOCKET_BAD) {
-
- /* this socket has been removed. Tell the app to remove it */
- remove_sock_from_hash = TRUE;
-
- entry = Curl_hash_pick(multi->sockhash, (char *)&s, sizeof(s));
- if(entry) {
- /* check if the socket to be removed serves a connection which has
- other easy-s in a pipeline. In this case the socket should not be
- removed. */
- struct connectdata *easy_conn = data->easy_conn;
- if(easy_conn) {
- if(easy_conn->recv_pipe && easy_conn->recv_pipe->size > 1) {
- /* the handle should not be removed from the pipe yet */
- remove_sock_from_hash = FALSE;
-
- /* Update the sockhash entry to instead point to the next in line
- for the recv_pipe, or the first (in case this particular easy
- isn't already) */
- if(entry->easy == data) {
- if(isHandleAtHead(data, easy_conn->recv_pipe))
- entry->easy = easy_conn->recv_pipe->head->next->ptr;
- else
- entry->easy = easy_conn->recv_pipe->head->ptr;
- }
- }
- if(easy_conn->send_pipe && easy_conn->send_pipe->size > 1) {
- /* the handle should not be removed from the pipe yet */
- remove_sock_from_hash = FALSE;
-
- /* Update the sockhash entry to instead point to the next in line
- for the send_pipe, or the first (in case this particular easy
- isn't already) */
- if(entry->easy == data) {
- if(isHandleAtHead(data, easy_conn->send_pipe))
- entry->easy = easy_conn->send_pipe->head->next->ptr;
- else
- entry->easy = easy_conn->send_pipe->head->ptr;
- }
- }
- /* Don't worry about overwriting recv_pipe head with send_pipe_head,
- when action will be asked on the socket (see multi_socket()), the
- head of the correct pipe will be taken according to the
- action. */
- }
- }
- else
- /* just a precaution, this socket really SHOULD be in the hash already
- but in case it isn't, we don't have to tell the app to remove it
- either since it never got to know about it */
- remove_sock_from_hash = FALSE;
-
- if(remove_sock_from_hash) {
- /* in this case 'entry' is always non-NULL */
- if(multi->socket_cb)
- multi->socket_cb(data,
- s,
- CURL_POLL_REMOVE,
- multi->socket_userp,
- entry->socketp);
- sh_delentry(multi->sockhash, s);
- }
-
- }
- }
-
- memcpy(data->sockets, socks, num*sizeof(curl_socket_t));
- data->numsocks = num;
-}
-
-/*
- * Curl_multi_closed()
- *
- * Used by the connect code to tell the multi_socket code that one of the
- * sockets we were using is about to be closed. This function will then
- * remove it from the sockethash for this handle to make the multi_socket API
- * behave properly, especially for the case when libcurl will create another
- * socket again and it gets the same file descriptor number.
- */
-
-CURL_STATIC void Curl_multi_closed(struct connectdata *conn, curl_socket_t s)
-{
- struct Curl_multi *multi = conn->data->multi;
- if(multi) {
- /* this is set if this connection is part of a handle that is added to
- a multi handle, and only then this is necessary */
- struct Curl_sh_entry *entry =
- Curl_hash_pick(multi->sockhash, (char *)&s, sizeof(s));
-
- if(entry) {
- if(multi->socket_cb)
- multi->socket_cb(conn->data, s, CURL_POLL_REMOVE,
- multi->socket_userp,
- entry->socketp);
-
- /* now remove it from the socket hash */
- sh_delentry(multi->sockhash, s);
- }
- }
-}
-
-
-
-/*
- * add_next_timeout()
- *
- * Each SessionHandle has a list of timeouts. The add_next_timeout() is called
- * when it has just been removed from the splay tree because the timeout has
- * expired. This function is then to advance in the list to pick the next
- * timeout to use (skip the already expired ones) and add this node back to
- * the splay tree again.
- *
- * The splay tree only has each sessionhandle as a single node and the nearest
- * timeout is used to sort it on.
- */
-static CURLMcode add_next_timeout(struct timeval now,
- struct Curl_multi *multi,
- struct SessionHandle *d)
-{
- struct timeval *tv = &d->state.expiretime;
- struct curl_llist *list = d->state.timeoutlist;
- struct curl_llist_element *e;
-
- /* move over the timeout list for this specific handle and remove all
- timeouts that are now passed tense and store the next pending
- timeout in *tv */
- for(e = list->head; e; ) {
- struct curl_llist_element *n = e->next;
- long diff = curlx_tvdiff(*(struct timeval *)e->ptr, now);
- if(diff <= 0)
- /* remove outdated entry */
- Curl_llist_remove(list, e, NULL);
- else
- /* the list is sorted so get out on the first mismatch */
- break;
- e = n;
- }
- e = list->head;
- if(!e) {
- /* clear the expire times within the handles that we remove from the
- splay tree */
- tv->tv_sec = 0;
- tv->tv_usec = 0;
- }
- else {
- /* copy the first entry to 'tv' */
- memcpy(tv, e->ptr, sizeof(*tv));
-
- /* remove first entry from list */
- Curl_llist_remove(list, e, NULL);
-
- /* insert this node again into the splay */
- multi->timetree = Curl_splayinsert(*tv, multi->timetree,
- &d->state.timenode);
- }
- return CURLM_OK;
-}
-
-static CURLMcode multi_socket(struct Curl_multi *multi,
- bool checkall,
- curl_socket_t s,
- int ev_bitmask,
- int *running_handles)
-{
- CURLMcode result = CURLM_OK;
- struct SessionHandle *data = NULL;
- struct Curl_tree *t;
- struct timeval now = Curl_tvnow();
-
- if(checkall) {
- /* *perform() deals with running_handles on its own */
- result = curl_multi_perform(multi, running_handles);
-
- /* walk through each easy handle and do the socket state change magic
- and callbacks */
- if(result != CURLM_BAD_HANDLE) {
- data=multi->easyp;
- while(data) {
- singlesocket(multi, data);
- data = data->next;
- }
- }
-
- /* or should we fall-through and do the timer-based stuff? */
- return result;
- }
- else if(s != CURL_SOCKET_TIMEOUT) {
-
- struct Curl_sh_entry *entry =
- Curl_hash_pick(multi->sockhash, (char *)&s, sizeof(s));
-
- if(!entry)
- /* Unmatched socket, we can't act on it but we ignore this fact. In
- real-world tests it has been proved that libevent can in fact give
- the application actions even though the socket was just previously
- asked to get removed, so thus we better survive stray socket actions
- and just move on. */
- ;
- else {
- SIGPIPE_VARIABLE(pipe_st);
-
- data = entry->easy;
-
- if(data->magic != CURLEASY_MAGIC_NUMBER)
- /* bad bad bad bad bad bad bad */
- return CURLM_INTERNAL_ERROR;
-
- /* If the pipeline is enabled, take the handle which is in the head of
- the pipeline. If we should write into the socket, take the send_pipe
- head. If we should read from the socket, take the recv_pipe head. */
- if(data->easy_conn) {
- if((ev_bitmask & CURL_POLL_OUT) &&
- data->easy_conn->send_pipe &&
- data->easy_conn->send_pipe->head)
- data = data->easy_conn->send_pipe->head->ptr;
- else if((ev_bitmask & CURL_POLL_IN) &&
- data->easy_conn->recv_pipe &&
- data->easy_conn->recv_pipe->head)
- data = data->easy_conn->recv_pipe->head->ptr;
- }
-
- if(data->easy_conn &&
- !(data->easy_conn->handler->flags & PROTOPT_DIRLOCK))
- /* set socket event bitmask if they're not locked */
- data->easy_conn->cselect_bits = ev_bitmask;
-
- sigpipe_ignore(data, &pipe_st);
- result = multi_runsingle(multi, now, data);
- sigpipe_restore(&pipe_st);
-
- if(data->easy_conn &&
- !(data->easy_conn->handler->flags & PROTOPT_DIRLOCK))
- /* clear the bitmask only if not locked */
- data->easy_conn->cselect_bits = 0;
-
- if(CURLM_OK >= result)
- /* get the socket(s) and check if the state has been changed since
- last */
- singlesocket(multi, data);
-
- /* Now we fall-through and do the timer-based stuff, since we don't want
- to force the user to have to deal with timeouts as long as at least
- one connection in fact has traffic. */
-
- data = NULL; /* set data to NULL again to avoid calling
- multi_runsingle() in case there's no need to */
- now = Curl_tvnow(); /* get a newer time since the multi_runsingle() loop
- may have taken some time */
- }
- }
- else {
- /* Asked to run due to time-out. Clear the 'lastcall' variable to force
- update_timer() to trigger a callback to the app again even if the same
- timeout is still the one to run after this call. That handles the case
- when the application asks libcurl to run the timeout prematurely. */
- memset(&multi->timer_lastcall, 0, sizeof(multi->timer_lastcall));
- }
-
- /*
- * The loop following here will go on as long as there are expire-times left
- * to process in the splay and 'data' will be re-assigned for every expired
- * handle we deal with.
- */
- do {
- /* the first loop lap 'data' can be NULL */
- if(data) {
- SIGPIPE_VARIABLE(pipe_st);
-
- sigpipe_ignore(data, &pipe_st);
- result = multi_runsingle(multi, now, data);
- sigpipe_restore(&pipe_st);
-
- if(CURLM_OK >= result)
- /* get the socket(s) and check if the state has been changed since
- last */
- singlesocket(multi, data);
- }
-
- /* Check if there's one (more) expired timer to deal with! This function
- extracts a matching node if there is one */
-
- multi->timetree = Curl_splaygetbest(now, multi->timetree, &t);
- if(t) {
- data = t->payload; /* assign this for next loop */
- (void)add_next_timeout(now, multi, t->payload);
- }
-
- } while(t);
-
- *running_handles = multi->num_alive;
- return result;
-}
-
-//#undef curl_multi_setopt
-CURLMcode curl_multi_setopt(CURLM *multi_handle,
- CURLMoption option, ...)
-{
- struct Curl_multi *multi=(struct Curl_multi *)multi_handle;
- CURLMcode res = CURLM_OK;
- va_list param;
-
- if(!GOOD_MULTI_HANDLE(multi))
- return CURLM_BAD_HANDLE;
-
- va_start(param, option);
-
- switch(option) {
- case CURLMOPT_SOCKETFUNCTION:
- multi->socket_cb = va_arg(param, curl_socket_callback);
- break;
- case CURLMOPT_SOCKETDATA:
- multi->socket_userp = va_arg(param, void *);
- break;
- case CURLMOPT_PIPELINING:
- multi->pipelining_enabled = (0 != va_arg(param, long)) ? TRUE : FALSE;
- break;
- case CURLMOPT_TIMERFUNCTION:
- multi->timer_cb = va_arg(param, curl_multi_timer_callback);
- break;
- case CURLMOPT_TIMERDATA:
- multi->timer_userp = va_arg(param, void *);
- break;
- case CURLMOPT_MAXCONNECTS:
- multi->maxconnects = va_arg(param, long);
- break;
- case CURLMOPT_MAX_HOST_CONNECTIONS:
- multi->max_host_connections = va_arg(param, long);
- break;
- case CURLMOPT_MAX_PIPELINE_LENGTH:
- multi->max_pipeline_length = va_arg(param, long);
- break;
- case CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE:
- multi->content_length_penalty_size = va_arg(param, long);
- break;
- case CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE:
- multi->chunk_length_penalty_size = va_arg(param, long);
- break;
- case CURLMOPT_PIPELINING_SITE_BL:
- res = Curl_pipeline_set_site_blacklist(va_arg(param, char **),
- &multi->pipelining_site_bl);
- break;
- case CURLMOPT_PIPELINING_SERVER_BL:
- res = Curl_pipeline_set_server_blacklist(va_arg(param, char **),
- &multi->pipelining_server_bl);
- break;
- case CURLMOPT_MAX_TOTAL_CONNECTIONS:
- multi->max_total_connections = va_arg(param, long);
- break;
- default:
- res = CURLM_UNKNOWN_OPTION;
- break;
- }
- va_end(param);
- return res;
-}
-
-/* we define curl_multi_socket() in the public multi.h header */
-//#undef curl_multi_socket
-
-CURLMcode curl_multi_socket(CURLM *multi_handle, curl_socket_t s,
- int *running_handles)
-{
- CURLMcode result = multi_socket((struct Curl_multi *)multi_handle, FALSE, s,
- 0, running_handles);
- if(CURLM_OK >= result)
- update_timer((struct Curl_multi *)multi_handle);
- return result;
-}
-
-CURLMcode curl_multi_socket_action(CURLM *multi_handle, curl_socket_t s,
- int ev_bitmask, int *running_handles)
-{
- CURLMcode result = multi_socket((struct Curl_multi *)multi_handle, FALSE, s,
- ev_bitmask, running_handles);
- if(CURLM_OK >= result)
- update_timer((struct Curl_multi *)multi_handle);
- return result;
-}
-
-CURLMcode curl_multi_socket_all(CURLM *multi_handle, int *running_handles)
-
-{
- CURLMcode result = multi_socket((struct Curl_multi *)multi_handle,
- TRUE, CURL_SOCKET_BAD, 0, running_handles);
- if(CURLM_OK >= result)
- update_timer((struct Curl_multi *)multi_handle);
- return result;
-}
-
-static CURLMcode multi_timeout(struct Curl_multi *multi,
- long *timeout_ms)
-{
- static struct timeval tv_zero = {0, 0};
-
- if(multi->timetree) {
- /* we have a tree of expire times */
- struct timeval now = Curl_tvnow();
-
- /* splay the lowest to the bottom */
- multi->timetree = Curl_splay(tv_zero, multi->timetree);
-
- if(Curl_splaycomparekeys(multi->timetree->key, now) > 0) {
- /* some time left before expiration */
- *timeout_ms = curlx_tvdiff(multi->timetree->key, now);
- if(!*timeout_ms)
- /*
- * Since we only provide millisecond resolution on the returned value
- * and the diff might be less than one millisecond here, we don't
- * return zero as that may cause short bursts of busyloops on fast
- * processors while the diff is still present but less than one
- * millisecond! instead we return 1 until the time is ripe.
- */
- *timeout_ms=1;
- }
- else
- /* 0 means immediately */
- *timeout_ms = 0;
- }
- else
- *timeout_ms = -1;
-
- return CURLM_OK;
-}
-
-CURLMcode curl_multi_timeout(CURLM *multi_handle,
- long *timeout_ms)
-{
- struct Curl_multi *multi=(struct Curl_multi *)multi_handle;
-
- /* First, make some basic checks that the CURLM handle is a good handle */
- if(!GOOD_MULTI_HANDLE(multi))
- return CURLM_BAD_HANDLE;
-
- return multi_timeout(multi, timeout_ms);
-}
-
-/*
- * Tell the application it should update its timers, if it subscribes to the
- * update timer callback.
- */
-static int update_timer(struct Curl_multi *multi)
-{
- long timeout_ms;
-
- if(!multi->timer_cb)
- return 0;
- if(multi_timeout(multi, &timeout_ms)) {
- return -1;
- }
- if(timeout_ms < 0) {
- static const struct timeval none={0, 0};
- if(Curl_splaycomparekeys(none, multi->timer_lastcall)) {
- multi->timer_lastcall = none;
- /* there's no timeout now but there was one previously, tell the app to
- disable it */
- return multi->timer_cb((CURLM*)multi, -1, multi->timer_userp);
- }
- return 0;
- }
-
- /* When multi_timeout() is done, multi->timetree points to the node with the
- * timeout we got the (relative) time-out time for. We can thus easily check
- * if this is the same (fixed) time as we got in a previous call and then
- * avoid calling the callback again. */
- if(Curl_splaycomparekeys(multi->timetree->key, multi->timer_lastcall) == 0)
- return 0;
-
- multi->timer_lastcall = multi->timetree->key;
-
- return multi->timer_cb((CURLM*)multi, timeout_ms, multi->timer_userp);
-}
-
-static bool isHandleAtHead(struct SessionHandle *handle,
- struct curl_llist *pipeline)
-{
- struct curl_llist_element *curr = pipeline->head;
- if(curr)
- return (curr->ptr == handle) ? TRUE : FALSE;
-
- return FALSE;
-}
-
-/*
- * multi_freetimeout()
- *
- * Callback used by the llist system when a single timeout list entry is
- * destroyed.
- */
-static void multi_freetimeout(void *user, void *entryptr)
-{
- (void)user;
-
- /* the entry was plain malloc()'ed */
- free(entryptr);
-}
-
-/*
- * multi_addtimeout()
- *
- * Add a timestamp to the list of timeouts. Keep the list sorted so that head
- * of list is always the timeout nearest in time.
- *
- */
-static CURLMcode
-multi_addtimeout(struct curl_llist *timeoutlist,
- struct timeval *stamp)
-{
- struct curl_llist_element *e;
- struct timeval *timedup;
- struct curl_llist_element *prev = NULL;
-
- timedup = malloc(sizeof(*timedup));
- if(!timedup)
- return CURLM_OUT_OF_MEMORY;
-
- /* copy the timestamp */
- memcpy(timedup, stamp, sizeof(*timedup));
-
- if(Curl_llist_count(timeoutlist)) {
- /* find the correct spot in the list */
- for(e = timeoutlist->head; e; e = e->next) {
- struct timeval *checktime = e->ptr;
- long diff = curlx_tvdiff(*checktime, *timedup);
- if(diff > 0)
- break;
- prev = e;
- }
-
- }
- /* else
- this is the first timeout on the list */
-
- if(!Curl_llist_insert_next(timeoutlist, prev, timedup)) {
- free(timedup);
- return CURLM_OUT_OF_MEMORY;
- }
-
- return CURLM_OK;
-}
-
-/*
- * Curl_expire()
- *
- * given a number of milliseconds from now to use to set the 'act before
- * this'-time for the transfer, to be extracted by curl_multi_timeout()
- *
- * Note that the timeout will be added to a queue of timeouts if it defines a
- * moment in time that is later than the current head of queue.
- *
- * Pass zero to clear all timeout values for this handle.
-*/
-CURL_STATIC void Curl_expire(struct SessionHandle *data, long milli)
-{
- struct Curl_multi *multi = data->multi;
- struct timeval *nowp = &data->state.expiretime;
- int rc;
-
- /* this is only interesting while there is still an associated multi struct
- remaining! */
- if(!multi)
- return;
-
- if(!milli) {
- /* No timeout, clear the time data. */
- if(nowp->tv_sec || nowp->tv_usec) {
- /* Since this is an cleared time, we must remove the previous entry from
- the splay tree */
- struct curl_llist *list = data->state.timeoutlist;
-
- rc = Curl_splayremovebyaddr(multi->timetree,
- &data->state.timenode,
- &multi->timetree);
- if(rc)
- infof(data, "Internal error clearing splay node = %d\n", rc);
-
- /* flush the timeout list too */
- while(list->size > 0)
- Curl_llist_remove(list, list->tail, NULL);
-
-#ifdef DEBUGBUILD
- infof(data, "Expire cleared\n");
-#endif
- nowp->tv_sec = 0;
- nowp->tv_usec = 0;
- }
- }
- else {
- struct timeval set;
-
- set = Curl_tvnow();
- set.tv_sec += milli/1000;
- set.tv_usec += (milli%1000)*1000;
-
- if(set.tv_usec >= 1000000) {
- set.tv_sec++;
- set.tv_usec -= 1000000;
- }
-
- if(nowp->tv_sec || nowp->tv_usec) {
- /* This means that the struct is added as a node in the splay tree.
- Compare if the new time is earlier, and only remove-old/add-new if it
- is. */
- long diff = curlx_tvdiff(set, *nowp);
- if(diff > 0) {
- /* the new expire time was later so just add it to the queue
- and get out */
- multi_addtimeout(data->state.timeoutlist, &set);
- return;
- }
-
- /* the new time is newer than the presently set one, so add the current
- to the queue and update the head */
- multi_addtimeout(data->state.timeoutlist, nowp);
-
- /* Since this is an updated time, we must remove the previous entry from
- the splay tree first and then re-add the new value */
- rc = Curl_splayremovebyaddr(multi->timetree,
- &data->state.timenode,
- &multi->timetree);
- if(rc)
- infof(data, "Internal error removing splay node = %d\n", rc);
- }
-
- *nowp = set;
- data->state.timenode.payload = data;
- multi->timetree = Curl_splayinsert(*nowp,
- multi->timetree,
- &data->state.timenode);
- }
-#if 0
- Curl_splayprint(multi->timetree, 0, TRUE);
-#endif
-}
-
-/*
- * Curl_expire_latest()
- *
- * This is like Curl_expire() but will only add a timeout node to the list of
- * timers if there is no timeout that will expire before the given time.
- *
- * Use this function if the code logic risks calling this function many times
- * or if there's no particular conditional wait in the code for this specific
- * time-out period to expire.
- *
- */
-CURL_STATIC void Curl_expire_latest(struct SessionHandle *data, long milli)
-{
- struct timeval *expire = &data->state.expiretime;
-
- struct timeval set;
-
- set = Curl_tvnow();
- set.tv_sec += milli / 1000;
- set.tv_usec += (milli % 1000) * 1000;
-
- if(set.tv_usec >= 1000000) {
- set.tv_sec++;
- set.tv_usec -= 1000000;
- }
-
- if(expire->tv_sec || expire->tv_usec) {
- /* This means that the struct is added as a node in the splay tree.
- Compare if the new time is earlier, and only remove-old/add-new if it
- is. */
- long diff = curlx_tvdiff(set, *expire);
- if(diff > 0)
- /* the new expire time was later than the top time, so just skip this */
- return;
- }
-
- /* Just add the timeout like normal */
- Curl_expire(data, milli);
-}
-
-CURLMcode curl_multi_assign(CURLM *multi_handle,
- curl_socket_t s, void *hashp)
-{
- struct Curl_sh_entry *there = NULL;
- struct Curl_multi *multi = (struct Curl_multi *)multi_handle;
-
- if(s != CURL_SOCKET_BAD)
- there = Curl_hash_pick(multi->sockhash, (char *)&s, sizeof(curl_socket_t));
-
- if(!there)
- return CURLM_BAD_SOCKET;
-
- there->socketp = hashp;
-
- return CURLM_OK;
-}
-
-CURL_STATIC size_t Curl_multi_max_host_connections(struct Curl_multi *multi)
-{
- return multi ? multi->max_host_connections : 0;
-}
-
-CURL_STATIC size_t Curl_multi_max_total_connections(struct Curl_multi *multi)
-{
- return multi ? multi->max_total_connections : 0;
-}
-
-CURL_STATIC size_t Curl_multi_max_pipeline_length(struct Curl_multi *multi)
-{
- return multi ? multi->max_pipeline_length : 0;
-}
-
-CURL_STATIC curl_off_t Curl_multi_content_length_penalty_size(struct Curl_multi *multi)
-{
- return multi ? multi->content_length_penalty_size : 0;
-}
-
-CURL_STATIC curl_off_t Curl_multi_chunk_length_penalty_size(struct Curl_multi *multi)
-{
- return multi ? multi->chunk_length_penalty_size : 0;
-}
-
-CURL_STATIC struct curl_llist *Curl_multi_pipelining_site_bl(struct Curl_multi *multi)
-{
- return multi->pipelining_site_bl;
-}
-
-CURL_STATIC struct curl_llist *Curl_multi_pipelining_server_bl(struct Curl_multi *multi)
-{
- return multi->pipelining_server_bl;
-}
-
-CURL_STATIC void Curl_multi_process_pending_handles(struct Curl_multi *multi)
-{
- struct curl_llist_element *e = multi->pending->head;
-
- while(e) {
- struct SessionHandle *data = e->ptr;
- struct curl_llist_element *next = e->next;
-
- if(data->mstate == CURLM_STATE_CONNECT_PEND) {
- multistate(data, CURLM_STATE_CONNECT);
-
- /* Remove this node from the list */
- Curl_llist_remove(multi->pending, e, NULL);
-
- /* Make sure that the handle will be processed soonish. */
- Curl_expire_latest(data, 1);
- }
-
- e = next; /* operate on next handle */
- }
-}
-
-#ifdef DEBUGBUILD
-CURL_STATIC void Curl_multi_dump(const struct Curl_multi *multi_handle)
-{
- struct Curl_multi *multi=(struct Curl_multi *)multi_handle;
- struct SessionHandle *data;
- int i;
- fprintf(stderr, "* Multi status: %d handles, %d alive\n",
- multi->num_easy, multi->num_alive);
- for(data=multi->easyp; data; data = data->next) {
- if(data->mstate < CURLM_STATE_COMPLETED) {
- /* only display handles that are not completed */
- fprintf(stderr, "handle %p, state %s, %d sockets\n",
- (void *)data,
- statename[data->mstate], data->numsocks);
- for(i=0; i < data->numsocks; i++) {
- curl_socket_t s = data->sockets[i];
- struct Curl_sh_entry *entry =
- Curl_hash_pick(multi->sockhash, (char *)&s, sizeof(s));
-
- fprintf(stderr, "%d ", (int)s);
- if(!entry) {
- fprintf(stderr, "INTERNAL CONFUSION\n");
- continue;
- }
- fprintf(stderr, "[%s %s] ",
- entry->action&CURL_POLL_IN?"RECVING":"",
- entry->action&CURL_POLL_OUT?"SENDING":"");
- }
- if(data->numsocks)
- fprintf(stderr, "\n");
- }
- }
-}
-#endif
|