435 lines
11 KiB
C
Executable File
435 lines
11 KiB
C
Executable File
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 2013, Linus Nielsen Feltzing, <linus@haxx.se>
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* Copyright (C) 2013-2015, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include "curl_setup.h"
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#include <curl/curl.h>
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#include "urldata.h"
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#include "url.h"
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#include "progress.h"
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#include "multiif.h"
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#include "pipeline.h"
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#include "sendf.h"
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#include "rawstr.h"
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#include "curl_memory.h"
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/* The last #include file should be: */
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#include "memdebug.h"
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struct site_blacklist_entry {
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char *hostname;
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unsigned short port;
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};
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static void site_blacklist_llist_dtor(void *user, void *element)
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{
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struct site_blacklist_entry *entry = element;
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(void)user;
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Curl_safefree(entry->hostname);
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free(entry);
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}
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static void server_blacklist_llist_dtor(void *user, void *element)
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{
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(void)user;
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free(element);
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}
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bool Curl_pipeline_penalized(struct SessionHandle *data,
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struct connectdata *conn)
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{
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if(data) {
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bool penalized = FALSE;
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curl_off_t penalty_size =
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Curl_multi_content_length_penalty_size(data->multi);
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curl_off_t chunk_penalty_size =
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Curl_multi_chunk_length_penalty_size(data->multi);
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curl_off_t recv_size = -2; /* Make it easy to spot in the log */
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/* Find the head of the recv pipe, if any */
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if(conn->recv_pipe && conn->recv_pipe->head) {
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struct SessionHandle *recv_handle = conn->recv_pipe->head->ptr;
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recv_size = recv_handle->req.size;
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if(penalty_size > 0 && recv_size > penalty_size)
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penalized = TRUE;
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}
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if(chunk_penalty_size > 0 &&
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(curl_off_t)conn->chunk.datasize > chunk_penalty_size)
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penalized = TRUE;
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infof(data, "Conn: %ld (%p) Receive pipe weight: (%"
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CURL_FORMAT_CURL_OFF_T "/%zu), penalized: %s\n",
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conn->connection_id, (void *)conn, recv_size,
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conn->chunk.datasize, penalized?"TRUE":"FALSE");
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return penalized;
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}
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return FALSE;
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}
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static CURLcode addHandleToPipeline(struct SessionHandle *data,
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struct curl_llist *pipeline)
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{
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if(!Curl_llist_insert_next(pipeline, pipeline->tail, data))
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return CURLE_OUT_OF_MEMORY;
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return CURLE_OK;
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}
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CURLcode Curl_add_handle_to_pipeline(struct SessionHandle *handle,
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struct connectdata *conn)
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{
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struct curl_llist_element *sendhead = conn->send_pipe->head;
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struct curl_llist *pipeline;
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CURLcode result;
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pipeline = conn->send_pipe;
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result = addHandleToPipeline(handle, pipeline);
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if(pipeline == conn->send_pipe && sendhead != conn->send_pipe->head) {
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/* this is a new one as head, expire it */
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Curl_pipeline_leave_write(conn); /* not in use yet */
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Curl_expire(conn->send_pipe->head->ptr, 1);
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}
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#if 0 /* enable for pipeline debugging */
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print_pipeline(conn);
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#endif
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return result;
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}
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/* Move this transfer from the sending list to the receiving list.
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Pay special attention to the new sending list "leader" as it needs to get
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checked to update what sockets it acts on.
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*/
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void Curl_move_handle_from_send_to_recv_pipe(struct SessionHandle *handle,
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struct connectdata *conn)
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{
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struct curl_llist_element *curr;
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curr = conn->send_pipe->head;
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while(curr) {
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if(curr->ptr == handle) {
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Curl_llist_move(conn->send_pipe, curr,
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conn->recv_pipe, conn->recv_pipe->tail);
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if(conn->send_pipe->head) {
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/* Since there's a new easy handle at the start of the send pipeline,
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set its timeout value to 1ms to make it trigger instantly */
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Curl_pipeline_leave_write(conn); /* not used now */
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#ifdef DEBUGBUILD
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infof(conn->data, "%p is at send pipe head B!\n",
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(void *)conn->send_pipe->head->ptr);
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#endif
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Curl_expire(conn->send_pipe->head->ptr, 1);
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}
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/* The receiver's list is not really interesting here since either this
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handle is now first in the list and we'll deal with it soon, or
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another handle is already first and thus is already taken care of */
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break; /* we're done! */
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}
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curr = curr->next;
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}
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}
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bool Curl_pipeline_site_blacklisted(struct SessionHandle *handle,
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struct connectdata *conn)
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{
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if(handle->multi) {
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struct curl_llist *blacklist =
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Curl_multi_pipelining_site_bl(handle->multi);
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if(blacklist) {
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struct curl_llist_element *curr;
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curr = blacklist->head;
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while(curr) {
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struct site_blacklist_entry *site;
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site = curr->ptr;
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if(Curl_raw_equal(site->hostname, conn->host.name) &&
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site->port == conn->remote_port) {
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infof(handle, "Site %s:%d is pipeline blacklisted\n",
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conn->host.name, conn->remote_port);
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return TRUE;
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}
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curr = curr->next;
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}
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}
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}
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return FALSE;
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}
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CURLMcode Curl_pipeline_set_site_blacklist(char **sites,
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struct curl_llist **list_ptr)
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{
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struct curl_llist *old_list = *list_ptr;
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struct curl_llist *new_list = NULL;
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if(sites) {
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new_list = Curl_llist_alloc((curl_llist_dtor) site_blacklist_llist_dtor);
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if(!new_list)
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return CURLM_OUT_OF_MEMORY;
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/* Parse the URLs and populate the list */
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while(*sites) {
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char *hostname;
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char *port;
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struct site_blacklist_entry *entry;
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hostname = strdup(*sites);
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if(!hostname) {
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Curl_llist_destroy(new_list, NULL);
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return CURLM_OUT_OF_MEMORY;
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}
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entry = malloc(sizeof(struct site_blacklist_entry));
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if(!entry) {
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free(hostname);
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Curl_llist_destroy(new_list, NULL);
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return CURLM_OUT_OF_MEMORY;
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}
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port = strchr(hostname, ':');
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if(port) {
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*port = '\0';
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port++;
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entry->port = (unsigned short)strtol(port, NULL, 10);
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}
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else {
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/* Default port number for HTTP */
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entry->port = 80;
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}
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entry->hostname = hostname;
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if(!Curl_llist_insert_next(new_list, new_list->tail, entry)) {
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site_blacklist_llist_dtor(NULL, entry);
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Curl_llist_destroy(new_list, NULL);
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return CURLM_OUT_OF_MEMORY;
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}
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sites++;
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}
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}
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/* Free the old list */
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if(old_list) {
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Curl_llist_destroy(old_list, NULL);
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}
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/* This might be NULL if sites == NULL, i.e the blacklist is cleared */
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*list_ptr = new_list;
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return CURLM_OK;
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}
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bool Curl_pipeline_server_blacklisted(struct SessionHandle *handle,
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char *server_name)
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{
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if(handle->multi && server_name) {
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struct curl_llist *blacklist =
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Curl_multi_pipelining_server_bl(handle->multi);
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if(blacklist) {
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struct curl_llist_element *curr;
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curr = blacklist->head;
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while(curr) {
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char *bl_server_name;
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bl_server_name = curr->ptr;
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if(Curl_raw_nequal(bl_server_name, server_name,
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strlen(bl_server_name))) {
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infof(handle, "Server %s is blacklisted\n", server_name);
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return TRUE;
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}
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curr = curr->next;
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}
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}
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DEBUGF(infof(handle, "Server %s is not blacklisted\n", server_name));
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}
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return FALSE;
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}
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CURLMcode Curl_pipeline_set_server_blacklist(char **servers,
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struct curl_llist **list_ptr)
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{
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struct curl_llist *old_list = *list_ptr;
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struct curl_llist *new_list = NULL;
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if(servers) {
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new_list = Curl_llist_alloc((curl_llist_dtor) server_blacklist_llist_dtor);
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if(!new_list)
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return CURLM_OUT_OF_MEMORY;
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/* Parse the URLs and populate the list */
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while(*servers) {
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char *server_name;
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server_name = strdup(*servers);
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if(!server_name)
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return CURLM_OUT_OF_MEMORY;
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if(!Curl_llist_insert_next(new_list, new_list->tail, server_name))
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return CURLM_OUT_OF_MEMORY;
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servers++;
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}
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}
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/* Free the old list */
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if(old_list) {
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Curl_llist_destroy(old_list, NULL);
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}
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/* This might be NULL if sites == NULL, i.e the blacklist is cleared */
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*list_ptr = new_list;
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return CURLM_OK;
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}
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static bool pipe_head(struct SessionHandle *data,
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struct curl_llist *pipeline)
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{
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if(pipeline) {
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struct curl_llist_element *curr = pipeline->head;
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if(curr)
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return (curr->ptr == data) ? TRUE : FALSE;
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}
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return FALSE;
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}
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/* returns TRUE if the given handle is head of the recv pipe */
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bool Curl_recvpipe_head(struct SessionHandle *data,
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struct connectdata *conn)
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{
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return pipe_head(data, conn->recv_pipe);
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}
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/* returns TRUE if the given handle is head of the send pipe */
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bool Curl_sendpipe_head(struct SessionHandle *data,
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struct connectdata *conn)
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{
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return pipe_head(data, conn->send_pipe);
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}
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/*
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* Check if the write channel is available and this handle as at the head,
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* then grab the channel and return TRUE.
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*
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* If not available, return FALSE.
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*/
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bool Curl_pipeline_checkget_write(struct SessionHandle *data,
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struct connectdata *conn)
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{
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if(conn->bits.multiplex)
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/* when multiplexing, we can use it at once */
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return TRUE;
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if(!conn->writechannel_inuse && Curl_sendpipe_head(data, conn)) {
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/* Grab the channel */
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conn->writechannel_inuse = TRUE;
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return TRUE;
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}
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return FALSE;
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}
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/*
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* Check if the read channel is available and this handle as at the head, then
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* grab the channel and return TRUE.
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*
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* If not available, return FALSE.
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*/
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bool Curl_pipeline_checkget_read(struct SessionHandle *data,
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struct connectdata *conn)
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{
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if(conn->bits.multiplex)
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/* when multiplexing, we can use it at once */
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return TRUE;
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if(!conn->readchannel_inuse && Curl_recvpipe_head(data, conn)) {
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/* Grab the channel */
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conn->readchannel_inuse = TRUE;
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return TRUE;
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}
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return FALSE;
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}
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/*
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* The current user of the pipeline write channel gives it up.
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*/
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void Curl_pipeline_leave_write(struct connectdata *conn)
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{
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conn->writechannel_inuse = FALSE;
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}
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/*
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* The current user of the pipeline read channel gives it up.
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*/
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void Curl_pipeline_leave_read(struct connectdata *conn)
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{
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conn->readchannel_inuse = FALSE;
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}
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#if 0
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void print_pipeline(struct connectdata *conn)
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{
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struct curl_llist_element *curr;
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struct connectbundle *cb_ptr;
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struct SessionHandle *data = conn->data;
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cb_ptr = conn->bundle;
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if(cb_ptr) {
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curr = cb_ptr->conn_list->head;
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while(curr) {
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conn = curr->ptr;
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infof(data, "- Conn %ld (%p) send_pipe: %zu, recv_pipe: %zu\n",
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conn->connection_id,
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(void *)conn,
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conn->send_pipe->size,
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conn->recv_pipe->size);
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curr = curr->next;
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}
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}
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}
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#endif
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