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-rw-r--r--lib/pipeline.c404
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diff --git a/lib/pipeline.c b/lib/pipeline.c
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-/***************************************************************************
- * _ _ ____ _
- * Project ___| | | | _ \| |
- * / __| | | | |_) | |
- * | (__| |_| | _ <| |___
- * \___|\___/|_| \_\_____|
- *
- * Copyright (C) 2013, Linus Nielsen Feltzing, <linus@haxx.se>
- * Copyright (C) 2013 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
- *
- * This software is licensed as described in the file COPYING, which
- * you should have received as part of this distribution. The terms
- * are also available at https://curl.haxx.se/docs/copyright.html.
- *
- * You may opt to use, copy, modify, merge, publish, distribute and/or sell
- * copies of the Software, and permit persons to whom the Software is
- * furnished to do so, under the terms of the COPYING file.
- *
- * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
- * KIND, either express or implied.
- *
- ***************************************************************************/
-
-#include "curl_setup.h"
-
-#include <curl/curl.h>
-
-#include "urldata.h"
-#include "url.h"
-#include "progress.h"
-#include "multiif.h"
-#include "pipeline.h"
-#include "sendf.h"
-#include "strcase.h"
-
-#include "curl_memory.h"
-/* The last #include file should be: */
-#include "memdebug.h"
-
-struct site_blacklist_entry {
- struct curl_llist_element list;
- unsigned short port;
- char hostname[1];
-};
-
-static void site_blacklist_llist_dtor(void *user, void *element)
-{
- struct site_blacklist_entry *entry = element;
- (void)user;
- free(entry);
-}
-
-static void server_blacklist_llist_dtor(void *user, void *element)
-{
- (void)user;
- free(element);
-}
-
-bool Curl_pipeline_penalized(struct Curl_easy *data,
- struct connectdata *conn)
-{
- if(data) {
- bool penalized = FALSE;
- curl_off_t penalty_size =
- Curl_multi_content_length_penalty_size(data->multi);
- curl_off_t chunk_penalty_size =
- Curl_multi_chunk_length_penalty_size(data->multi);
- curl_off_t recv_size = -2; /* Make it easy to spot in the log */
-
- /* Find the head of the recv pipe, if any */
- if(conn->recv_pipe.head) {
- struct Curl_easy *recv_handle = conn->recv_pipe.head->ptr;
-
- recv_size = recv_handle->req.size;
-
- if(penalty_size > 0 && recv_size > penalty_size)
- penalized = TRUE;
- }
-
- if(chunk_penalty_size > 0 &&
- (curl_off_t)conn->chunk.datasize > chunk_penalty_size)
- penalized = TRUE;
-
- infof(data, "Conn: %ld (%p) Receive pipe weight: (%"
- CURL_FORMAT_CURL_OFF_T "/%" CURL_FORMAT_CURL_OFF_T
- "), penalized: %s\n",
- conn->connection_id, (void *)conn, recv_size,
- conn->chunk.datasize, penalized?"TRUE":"FALSE");
- return penalized;
- }
- return FALSE;
-}
-
-static CURLcode addHandleToPipeline(struct Curl_easy *data,
- struct curl_llist *pipeline)
-{
- Curl_llist_insert_next(pipeline, pipeline->tail, data,
- &data->pipeline_queue);
- return CURLE_OK;
-}
-
-
-CURLcode Curl_add_handle_to_pipeline(struct Curl_easy *handle,
- struct connectdata *conn)
-{
- struct curl_llist_element *sendhead = conn->send_pipe.head;
- struct curl_llist *pipeline;
- CURLcode result;
-
- pipeline = &conn->send_pipe;
-
- result = addHandleToPipeline(handle, pipeline);
- if((conn->bundle->multiuse == BUNDLE_PIPELINING) &&
- (pipeline == &conn->send_pipe && sendhead != conn->send_pipe.head)) {
- /* this is a new one as head, expire it */
- Curl_pipeline_leave_write(conn); /* not in use yet */
- Curl_expire(conn->send_pipe.head->ptr, 0, EXPIRE_RUN_NOW);
- }
-
-#if 0 /* enable for pipeline debugging */
- print_pipeline(conn);
-#endif
-
- return result;
-}
-
-/* Move this transfer from the sending list to the receiving list.
-
- Pay special attention to the new sending list "leader" as it needs to get
- checked to update what sockets it acts on.
-
-*/
-void Curl_move_handle_from_send_to_recv_pipe(struct Curl_easy *handle,
- struct connectdata *conn)
-{
- struct curl_llist_element *curr;
-
- curr = conn->send_pipe.head;
- while(curr) {
- if(curr->ptr == handle) {
- Curl_llist_move(&conn->send_pipe, curr,
- &conn->recv_pipe, conn->recv_pipe.tail);
-
- if(conn->send_pipe.head) {
- /* Since there's a new easy handle at the start of the send pipeline,
- set its timeout value to 1ms to make it trigger instantly */
- Curl_pipeline_leave_write(conn); /* not used now */
-#ifdef DEBUGBUILD
- infof(conn->data, "%p is at send pipe head B!\n",
- (void *)conn->send_pipe.head->ptr);
-#endif
- Curl_expire(conn->send_pipe.head->ptr, 0, EXPIRE_RUN_NOW);
- }
-
- /* The receiver's list is not really interesting here since either this
- handle is now first in the list and we'll deal with it soon, or
- another handle is already first and thus is already taken care of */
-
- break; /* we're done! */
- }
- curr = curr->next;
- }
-}
-
-bool Curl_pipeline_site_blacklisted(struct Curl_easy *handle,
- struct connectdata *conn)
-{
- if(handle->multi) {
- struct curl_llist *blacklist =
- Curl_multi_pipelining_site_bl(handle->multi);
-
- if(blacklist) {
- struct curl_llist_element *curr;
-
- curr = blacklist->head;
- while(curr) {
- struct site_blacklist_entry *site;
-
- site = curr->ptr;
- if(strcasecompare(site->hostname, conn->host.name) &&
- site->port == conn->remote_port) {
- infof(handle, "Site %s:%d is pipeline blacklisted\n",
- conn->host.name, conn->remote_port);
- return TRUE;
- }
- curr = curr->next;
- }
- }
- }
- return FALSE;
-}
-
-CURLMcode Curl_pipeline_set_site_blacklist(char **sites,
- struct curl_llist *list)
-{
- /* Free the old list */
- if(list->size)
- Curl_llist_destroy(list, NULL);
-
- if(sites) {
- Curl_llist_init(list, (curl_llist_dtor) site_blacklist_llist_dtor);
-
- /* Parse the URLs and populate the list */
- while(*sites) {
- char *port;
- struct site_blacklist_entry *entry;
-
- entry = malloc(sizeof(struct site_blacklist_entry) + strlen(*sites));
- if(!entry) {
- Curl_llist_destroy(list, NULL);
- return CURLM_OUT_OF_MEMORY;
- }
- strcpy(entry->hostname, *sites);
-
- port = strchr(entry->hostname, ':');
- if(port) {
- *port = '\0';
- port++;
- entry->port = (unsigned short)strtol(port, NULL, 10);
- }
- else {
- /* Default port number for HTTP */
- entry->port = 80;
- }
-
- Curl_llist_insert_next(list, list->tail, entry, &entry->list);
- sites++;
- }
- }
-
- return CURLM_OK;
-}
-
-struct blacklist_node {
- struct curl_llist_element list;
- char server_name[1];
-};
-
-bool Curl_pipeline_server_blacklisted(struct Curl_easy *handle,
- char *server_name)
-{
- if(handle->multi && server_name) {
- struct curl_llist *list =
- Curl_multi_pipelining_server_bl(handle->multi);
-
- struct curl_llist_element *e = list->head;
- while(e) {
- struct blacklist_node *bl = (struct blacklist_node *)e;
- if(strncasecompare(bl->server_name, server_name,
- strlen(bl->server_name))) {
- infof(handle, "Server %s is blacklisted\n", server_name);
- return TRUE;
- }
- e = e->next;
- }
-
- DEBUGF(infof(handle, "Server %s is not blacklisted\n", server_name));
- }
- return FALSE;
-}
-
-CURLMcode Curl_pipeline_set_server_blacklist(char **servers,
- struct curl_llist *list)
-{
- /* Free the old list */
- if(list->size)
- Curl_llist_destroy(list, NULL);
-
- if(servers) {
- Curl_llist_init(list, (curl_llist_dtor) server_blacklist_llist_dtor);
-
- /* Parse the URLs and populate the list */
- while(*servers) {
- struct blacklist_node *n;
- size_t len = strlen(*servers);
-
- n = malloc(sizeof(struct blacklist_node) + len);
- if(!n) {
- Curl_llist_destroy(list, NULL);
- return CURLM_OUT_OF_MEMORY;
- }
- strcpy(n->server_name, *servers);
-
- Curl_llist_insert_next(list, list->tail, n, &n->list);
- servers++;
- }
- }
-
-
- return CURLM_OK;
-}
-
-static bool pipe_head(struct Curl_easy *data,
- struct curl_llist *pipeline)
-{
- if(pipeline) {
- struct curl_llist_element *curr = pipeline->head;
- if(curr)
- return (curr->ptr == data) ? TRUE : FALSE;
- }
- return FALSE;
-}
-
-/* returns TRUE if the given handle is head of the recv pipe */
-bool Curl_recvpipe_head(struct Curl_easy *data,
- struct connectdata *conn)
-{
- return pipe_head(data, &conn->recv_pipe);
-}
-
-/* returns TRUE if the given handle is head of the send pipe */
-bool Curl_sendpipe_head(struct Curl_easy *data,
- struct connectdata *conn)
-{
- return pipe_head(data, &conn->send_pipe);
-}
-
-
-/*
- * Check if the write channel is available and this handle as at the head,
- * then grab the channel and return TRUE.
- *
- * If not available, return FALSE.
- */
-
-bool Curl_pipeline_checkget_write(struct Curl_easy *data,
- struct connectdata *conn)
-{
- if(conn->bits.multiplex)
- /* when multiplexing, we can use it at once */
- return TRUE;
-
- if(!conn->writechannel_inuse && Curl_sendpipe_head(data, conn)) {
- /* Grab the channel */
- conn->writechannel_inuse = TRUE;
- return TRUE;
- }
- return FALSE;
-}
-
-
-/*
- * Check if the read channel is available and this handle as at the head, then
- * grab the channel and return TRUE.
- *
- * If not available, return FALSE.
- */
-
-bool Curl_pipeline_checkget_read(struct Curl_easy *data,
- struct connectdata *conn)
-{
- if(conn->bits.multiplex)
- /* when multiplexing, we can use it at once */
- return TRUE;
-
- if(!conn->readchannel_inuse && Curl_recvpipe_head(data, conn)) {
- /* Grab the channel */
- conn->readchannel_inuse = TRUE;
- return TRUE;
- }
- return FALSE;
-}
-
-/*
- * The current user of the pipeline write channel gives it up.
- */
-void Curl_pipeline_leave_write(struct connectdata *conn)
-{
- conn->writechannel_inuse = FALSE;
-}
-
-/*
- * The current user of the pipeline read channel gives it up.
- */
-void Curl_pipeline_leave_read(struct connectdata *conn)
-{
- conn->readchannel_inuse = FALSE;
-}
-
-
-#if 0
-void print_pipeline(struct connectdata *conn)
-{
- struct curl_llist_element *curr;
- struct connectbundle *cb_ptr;
- struct Curl_easy *data = conn->data;
-
- cb_ptr = conn->bundle;
-
- if(cb_ptr) {
- curr = cb_ptr->conn_list->head;
- while(curr) {
- conn = curr->ptr;
- infof(data, "- Conn %ld (%p) send_pipe: %zu, recv_pipe: %zu\n",
- conn->connection_id,
- (void *)conn,
- conn->send_pipe->size,
- conn->recv_pipe->size);
- curr = curr->next;
- }
- }
-}
-
-#endif
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