GNUnet  0.19.2
gnunet-service-messenger_message_state.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2020--2021 GNUnet e.V.
4 
5  GNUnet is free software: you can redistribute it and/or modify it
6  under the terms of the GNU Affero General Public License as published
7  by the Free Software Foundation, either version 3 of the License,
8  or (at your option) any later version.
9 
10  GNUnet is distributed in the hope that it will be useful, but
11  WITHOUT ANY WARRANTY; without even the implied warranty of
12  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  Affero General Public License for more details.
14 
15  You should have received a copy of the GNU Affero General Public License
16  along with this program. If not, see <http://www.gnu.org/licenses/>.
17 
18  SPDX-License-Identifier: AGPL3.0-or-later
19  */
26 #include "platform.h"
28 
29 void
31 {
33 
34  init_list_messages (&(state->last_messages));
35 }
36 
37 void
39 {
41 
42  clear_list_messages (&(state->last_messages));
43 }
44 
45 void
47  struct GNUNET_HashCode *hash)
48 {
49  GNUNET_assert((state) && (hash));
50 
51  if (state->last_messages.head)
52  GNUNET_memcpy(hash, &(state->last_messages.head->hash), sizeof(*hash));
53  else
54  memset (hash, 0, sizeof(*hash));
55 }
56 
57 const struct GNUNET_HashCode*
59 {
61 
62  if (state->last_messages.head == state->last_messages.tail)
63  return NULL;
64 
65  return &(state->last_messages.tail->hash);
66 }
67 
68 void
70  int requested,
71  const struct GNUNET_MESSENGER_Message *message,
72  const struct GNUNET_HashCode *hash)
73 {
74  GNUNET_assert((state) && (message) && (hash));
75 
76  if ((GNUNET_YES == requested) ||
77  (GNUNET_MESSENGER_KIND_INFO == message->header.kind) ||
79  return;
80 
81  if (GNUNET_MESSENGER_KIND_MERGE == message->header.kind)
82  remove_from_list_messages(&(state->last_messages), &(message->body.merge.previous));
83  remove_from_list_messages(&(state->last_messages), &(message->header.previous));
84 
85  add_to_list_messages (&(state->last_messages), hash);
86 }
87 
88 void
90  const char *path)
91 {
92  GNUNET_assert((state) && (path));
93 
94  char *last_messages_file;
95  GNUNET_asprintf (&last_messages_file, "%s%s", path, "last_messages.list");
96 
97  load_list_messages(&(state->last_messages), last_messages_file);
98  GNUNET_free(last_messages_file);
99 }
100 
101 void
103  const char *path)
104 {
105  GNUNET_assert((state) && (path));
106 
107  char *last_messages_file;
108  GNUNET_asprintf (&last_messages_file, "%s%s", path, "last_messages.list");
109 
110  save_list_messages(&(state->last_messages), last_messages_file);
111  GNUNET_free(last_messages_file);
112 }
113 
114 
enum State state
current state of profiling
void remove_from_list_messages(struct GNUNET_MESSENGER_ListMessages *messages, const struct GNUNET_HashCode *hash)
Removes the first entry with a matching hash from the list.
void clear_list_messages(struct GNUNET_MESSENGER_ListMessages *messages)
Clears the list of message hashes.
void load_list_messages(struct GNUNET_MESSENGER_ListMessages *messages, const char *path)
Loads the list of message hashes from a file under a given path.
void init_list_messages(struct GNUNET_MESSENGER_ListMessages *messages)
Initializes list of message hashes as empty list.
void save_list_messages(const struct GNUNET_MESSENGER_ListMessages *messages, const char *path)
Saves the list of message hashes to a file under a given path.
void add_to_list_messages(struct GNUNET_MESSENGER_ListMessages *messages, const struct GNUNET_HashCode *hash)
Adds a specific hash from a message to the end of the list.
void save_message_state(const struct GNUNET_MESSENGER_MessageState *state, const char *path)
void update_message_state(struct GNUNET_MESSENGER_MessageState *state, int requested, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
void clear_message_state(struct GNUNET_MESSENGER_MessageState *state)
void get_message_state_chain_hash(const struct GNUNET_MESSENGER_MessageState *state, struct GNUNET_HashCode *hash)
void init_message_state(struct GNUNET_MESSENGER_MessageState *state)
void load_message_state(struct GNUNET_MESSENGER_MessageState *state, const char *path)
const struct GNUNET_HashCode * get_message_state_merge_hash(const struct GNUNET_MESSENGER_MessageState *state)
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
@ GNUNET_YES
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
int int GNUNET_asprintf(char **buf, const char *format,...) __attribute__((format(printf
Like asprintf, just portable.
#define GNUNET_free(ptr)
Wrapper around free.
@ GNUNET_MESSENGER_KIND_INFO
The info kind.
@ GNUNET_MESSENGER_KIND_REQUEST
The request kind.
@ GNUNET_MESSENGER_KIND_MERGE
The merge kind.
A 512-bit hashcode.
struct GNUNET_MESSENGER_MessageMerge merge
struct GNUNET_HashCode previous
The hash of the previous message from the senders perspective.
enum GNUNET_MESSENGER_MessageKind kind
The kind of the message.
struct GNUNET_HashCode previous
The hash of a second previous message.
struct GNUNET_MESSENGER_MessageHeader header
Header.
struct GNUNET_MESSENGER_MessageBody body
Body.