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-rw-r--r--Utilities/cmcurl/lib/pipeline.c410
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+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 2013, Linus Nielsen Feltzing, <linus@haxx.se>
+ * Copyright (C) 2013 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#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 "/%zu), 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(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;
+}
+
+bool Curl_pipeline_server_blacklisted(struct Curl_easy *handle,
+ char *server_name)
+{
+ if(handle->multi && server_name) {
+ struct curl_llist *blacklist =
+ Curl_multi_pipelining_server_bl(handle->multi);
+
+ if(blacklist) {
+ struct curl_llist_element *curr;
+
+ curr = blacklist->head;
+ while(curr) {
+ char *bl_server_name;
+
+ bl_server_name = curr->ptr;
+ if(strncasecompare(bl_server_name, server_name,
+ strlen(bl_server_name))) {
+ infof(handle, "Server %s is blacklisted\n", server_name);
+ return TRUE;
+ }
+ curr = curr->next;
+ }
+ }
+
+ DEBUGF(infof(handle, "Server %s is not blacklisted\n", server_name));
+ }
+ return FALSE;
+}
+
+struct blacklist_node {
+ struct curl_llist_element list;
+ char server_name[1];
+};
+
+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->server_name,
+ &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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