tomato-testing/toxcore/friend_requests.c
Green Sky 9ace11a0e2 Squashed 'external/toxcore/c-toxcore/' changes from f1df709b87..8f0d505f9a
8f0d505f9a feat: add ngc events
9b8216e70c refactor: Make event dispatch ordered by receive time.
814c12a6f4 cleanup: Add dynamically derived array sizes to the API.
226b23be12 cleanup: Add explicit array sizes to toxencryptsave.
ef33cb4de0 cleanup: Add Toxav alias for ToxAV.
1da723b34d cleanup: Make Tox_Options a typedef.
b148a2afff chore: Simplify msvc build using vcpkg.
5cac6d7eb1 cleanup: Move `tox_get_system` out of the public API.
c9ca4007e3 refactor: Align group message sending with other send functions.
6c6c0b1b1b cleanup: Make setters take non-const `Tox *`.
a76f758d70 cleanup: Mark arrays in the tox API as `[]` instead of `*`.
baf6d1f6cf cleanup: Make array params in toxav `[]` instead of `*`.
79f55bd06a cleanup: Put the size of fixed arrays into the API types.
1e73698db2 cleanup: Add typedefs for public API int identifiers.
cac074c57f chore: Add fetch-sha256 script to update bootstrap node hash.
32576656bb Make the comment capitalization uniform
aff4dda17c Spellcheck tox-bootstrapd
40b5fbbe9d chore: Remove settings.yml in favour of hs-github-tools.
ebafd51be7 chore: Use GPL license with https.
0e42752f0f cleanup: Move all vptr-to-ptr casts to the beginning of a function.
5407384211 cleanup: Use github actions matrix to simplify CI.
82d8265688 fix: Use QueryPerformanceCounter on windows for monotonic time.
1224e656e3 chore: Add `net_(new|kill)_strerror` to cppcheck's allocators.
6a90ddfe4e cleanup: Run clang-tidy on headers, as well.
bd930cc80a cleanup: Make TCP connection failures a warning instead of error.
fad6e4e173 cleanup: Make all .c files include the headers they need.
ef4897a898 cleanup: Upgrade to clang-tidy-17 and fix some warnings.
REVERT: f1df709b87 feat: add ngc events
REVERT: 1b6c907235 refactor: Make event dispatch ordered by receive time.

git-subtree-dir: external/toxcore/c-toxcore
git-subtree-split: 8f0d505f9a598cc41c682178e1589bcc01efe9cb
2024-01-09 16:39:05 +01:00

174 lines
4.6 KiB
C

/* SPDX-License-Identifier: GPL-3.0-or-later
* Copyright © 2016-2018 The TokTok team.
* Copyright © 2013 Tox project.
*/
/**
* Handle friend requests.
*/
#include "friend_requests.h"
#include <stdlib.h>
#include <string.h>
#include "ccompat.h"
#include "crypto_core.h"
#include "friend_connection.h"
#include "onion_client.h"
/**
* NOTE: The following is just a temporary fix for the multiple friend requests received at the same time problem.
* TODO(irungentoo): Make this better (This will most likely tie in with the way we will handle spam).
*/
#define MAX_RECEIVED_STORED 32
struct Received_Requests {
uint8_t requests[MAX_RECEIVED_STORED][CRYPTO_PUBLIC_KEY_SIZE];
uint16_t requests_index;
};
struct Friend_Requests {
uint32_t nospam;
fr_friend_request_cb *handle_friendrequest;
uint8_t handle_friendrequest_isset;
void *handle_friendrequest_object;
filter_function_cb *filter_function;
void *filter_function_userdata;
struct Received_Requests received;
};
/** Set and get the nospam variable used to prevent one type of friend request spam. */
void set_nospam(Friend_Requests *fr, uint32_t num)
{
fr->nospam = num;
}
uint32_t get_nospam(const Friend_Requests *fr)
{
return fr->nospam;
}
/** Set the function that will be executed when a friend request for us is received. */
void callback_friendrequest(Friend_Requests *fr, fr_friend_request_cb *function, void *object)
{
fr->handle_friendrequest = function;
fr->handle_friendrequest_isset = 1;
fr->handle_friendrequest_object = object;
}
/** @brief Set the function used to check if a friend request should be displayed to the user or not.
* It must return 0 if the request is ok (anything else if it is bad).
*/
void set_filter_function(Friend_Requests *fr, filter_function_cb *function, void *userdata)
{
fr->filter_function = function;
fr->filter_function_userdata = userdata;
}
/** Add to list of received friend requests. */
non_null()
static void addto_receivedlist(Friend_Requests *fr, const uint8_t *real_pk)
{
if (fr->received.requests_index >= MAX_RECEIVED_STORED) {
fr->received.requests_index = 0;
}
pk_copy(fr->received.requests[fr->received.requests_index], real_pk);
++fr->received.requests_index;
}
/** @brief Check if a friend request was already received.
*
* @retval false if it did not.
* @retval true if it did.
*/
non_null()
static bool request_received(const Friend_Requests *fr, const uint8_t *real_pk)
{
for (uint32_t i = 0; i < MAX_RECEIVED_STORED; ++i) {
if (pk_equal(fr->received.requests[i], real_pk)) {
return true;
}
}
return false;
}
/** @brief Remove real_pk from received_requests list.
*
* @retval 0 if it removed it successfully.
* @retval -1 if it didn't find it.
*/
int remove_request_received(Friend_Requests *fr, const uint8_t *real_pk)
{
for (uint32_t i = 0; i < MAX_RECEIVED_STORED; ++i) {
if (pk_equal(fr->received.requests[i], real_pk)) {
crypto_memzero(fr->received.requests[i], CRYPTO_PUBLIC_KEY_SIZE);
return 0;
}
}
return -1;
}
non_null()
static int friendreq_handlepacket(void *object, const uint8_t *source_pubkey, const uint8_t *packet, uint16_t length,
void *userdata)
{
Friend_Requests *const fr = (Friend_Requests *)object;
if (length <= 1 + sizeof(fr->nospam) || length > ONION_CLIENT_MAX_DATA_SIZE) {
return 1;
}
++packet;
--length;
if (fr->handle_friendrequest_isset == 0) {
return 1;
}
if (request_received(fr, source_pubkey)) {
return 1;
}
if (memcmp(packet, &fr->nospam, sizeof(fr->nospam)) != 0) {
return 1;
}
if (fr->filter_function != nullptr) {
if (fr->filter_function(source_pubkey, fr->filter_function_userdata) != 0) {
return 1;
}
}
addto_receivedlist(fr, source_pubkey);
const uint32_t message_len = length - sizeof(fr->nospam);
VLA(uint8_t, message, message_len + 1);
memcpy(message, packet + sizeof(fr->nospam), message_len);
message[SIZEOF_VLA(message) - 1] = 0; /* Be sure the message is null terminated. */
fr->handle_friendrequest(fr->handle_friendrequest_object, source_pubkey, message, message_len, userdata);
return 0;
}
void friendreq_init(Friend_Requests *fr, Friend_Connections *fr_c)
{
set_friend_request_callback(fr_c, &friendreq_handlepacket, fr);
}
Friend_Requests *friendreq_new(void)
{
return (Friend_Requests *)calloc(1, sizeof(Friend_Requests));
}
void friendreq_kill(Friend_Requests *fr)
{
free(fr);
}