/* Try to send a friendrequest to peer with public_key
data is the data in the request and length is the length.
return -1 if failure.
return 0 if it sent the friend request directly to the friend.
return the number of peers it was routed through if it did not send it directly.*/
int send_friendrequest(uint8_t * public_key, uint8_t * data, uint32_t length)
{
uint8_t packet[MAX_DATA_SIZE];
int len = create_request(packet, public_key, data, length, 32); /* 32 is friend request packet id */
if (len == -1)
return -1;
IP_Port ip_port = DHT_getfriendip(public_key);
if (ip_port.ip.i == 1)
return -1;
if (ip_port.ip.i != 0) {
if (sendpacket(ip_port, packet, len) != -1)
return 0;
return -1;
}
int num = route_tofriend(public_key, packet, len);
if (num == 0)
return -1;
return num;
}
void print_friendlist()
{
uint32_t i, j, k;
IP_Port p_ip;
printf("_________________FRIENDS__________________________________\n");
for(k = 0; k < num_friends; k++) {
printf("FRIEND %u\n", k);
printf("ID: ");
for(j = 0; j < 32; j++) {
printf("%c", friends_list[k].client_id[j]);
}
p_ip = DHT_getfriendip(friends_list[k].client_id);
printf("\nIP: %u.%u.%u.%u:%u",p_ip.ip.c[0],p_ip.ip.c[1],p_ip.ip.c[2],p_ip.ip.c[3],ntohs(p_ip.port));
printf("\nCLIENTS IN LIST:\n\n");
for(i = 0; i < 4; i++) {
printf("ClientID: ");
for(j = 0; j < 32; j++) {
if(friends_list[k].client_list[i].client_id[j] < 16)
printf("0");
printf("%hhX", friends_list[k].client_list[i].client_id[j]);
}
p_ip = friends_list[k].client_list[i].ip_port;
printf("\nIP: %u.%u.%u.%u:%u",p_ip.ip.c[0],p_ip.ip.c[1],p_ip.ip.c[2],p_ip.ip.c[3],ntohs(p_ip.port));
printf("\nTimestamp: %llu",(long long unsigned int) friends_list[k].client_list[i].timestamp);
printf("\nLast pinged: %llu\n",(long long unsigned int) friends_list[k].client_list[i].last_pinged);
p_ip = friends_list[k].client_list[i].ret_ip_port;
printf("ret IP: %u.%u.%u.%u:%u\n",p_ip.ip.c[0],p_ip.ip.c[1],p_ip.ip.c[2],p_ip.ip.c[3],ntohs(p_ip.port));
printf("Timestamp: %llu\n", (long long unsigned int)friends_list[k].client_list[i].ret_timestamp);
}
}
}
/* Try to send a friend request to peer with public_key.
* data is the data in the request and length is the length.
* return -1 if failure.
* return 0 if it sent the friend request directly to the friend.
* return the number of peers it was routed through if it did not send it directly.
*/
int send_friendrequest(DHT *dht, uint8_t *public_key, uint32_t nospam_num, uint8_t *data, uint32_t length)
{
if (length + sizeof(nospam_num) > MAX_DATA_SIZE)
return -1;
uint8_t temp[MAX_DATA_SIZE];
memcpy(temp, &nospam_num, sizeof(nospam_num));
memcpy(temp + sizeof(nospam_num), data, length);
uint8_t packet[MAX_DATA_SIZE];
int len = create_request(dht->c->self_public_key, dht->c->self_secret_key, packet, public_key, temp,
length + sizeof(nospam_num),
CRYPTO_PACKET_FRIEND_REQ);
if (len == -1)
return -1;
IP_Port ip_port = DHT_getfriendip(dht, public_key);
if (ip_port.ip.uint32 == 1)
return -1;
if (ip_port.ip.uint32 != 0) {
if (sendpacket(dht->c->lossless_udp->net->sock, ip_port, packet, len) != -1)
return 0;
return -1;
}
int num = route_tofriend(dht, public_key, packet, len);
if (num == 0)
return -1;
return num;
}
/* Get the ip of friend friendnum and put it in ip_port
*
* return -1, -- if client_id does NOT refer to a friend
* return 0, -- if client_id refers to a friend and we failed to find the friend (yet)
* return 1, ip if client_id refers to a friend and we found him
*
*/
int onion_getfriendip(const Onion_Client *onion_c, int friend_num, IP_Port *ip_port)
{
uint8_t dht_public_key[crypto_box_PUBLICKEYBYTES];
if (onion_getfriend_DHT_pubkey(onion_c, friend_num, dht_public_key) == 0)
return -1;
return DHT_getfriendip(onion_c->dht, dht_public_key, ip_port);
}
/* Get the ip of friend friendnum and put it in ip_port
*
* return -1, -- if client_id does NOT refer to a friend
* return 0, -- if client_id refers to a friend and we failed to find the friend (yet)
* return 1, ip if client_id refers to a friend and we found him
*
*/
int onion_getfriendip(Onion_Client *onion_c, int friend_num, IP_Port *ip_port)
{
if ((uint32_t)friend_num >= onion_c->num_friends)
return -1;
if (onion_c->friends_list[friend_num].status == 0)
return -1;
if (!onion_c->friends_list[friend_num].is_fake_clientid)
return -1;
return DHT_getfriendip(onion_c->dht, onion_c->friends_list[friend_num].fake_client_id, ip_port);
}
/* Add nodes to the to_ping list.
* All nodes in this list are pinged every TIME_TO_PING seconds
* and are then removed from the list.
* If the list is full the nodes farthest from our public_key are replaced.
* The purpose of this list is to enable quick integration of new nodes into the
* network while preventing amplification attacks.
*
* return 0 if node was added.
* return -1 if node was not added.
*/
int add_to_ping(PING *ping, const uint8_t *public_key, IP_Port ip_port)
{
if (!ip_isset(&ip_port.ip)) {
return -1;
}
if (!node_addable_to_close_list(ping->dht, public_key, ip_port)) {
return -1;
}
if (in_list(ping->dht->close_clientlist, LCLIENT_LIST, public_key, ip_port)) {
return -1;
}
IP_Port temp;
if (DHT_getfriendip(ping->dht, public_key, &temp) == 0) {
send_ping_request(ping, ip_port, public_key);
return -1;
}
unsigned int i;
for (i = 0; i < MAX_TO_PING; ++i) {
if (!ip_isset(&ping->to_ping[i].ip_port.ip)) {
memcpy(ping->to_ping[i].public_key, public_key, CRYPTO_PUBLIC_KEY_SIZE);
ipport_copy(&ping->to_ping[i].ip_port, &ip_port);
return 0;
}
if (public_key_cmp(ping->to_ping[i].public_key, public_key) == 0) {
return -1;
}
}
if (add_to_list(ping->to_ping, MAX_TO_PING, public_key, ip_port, ping->dht->self_public_key)) {
return 0;
}
return -1;
}
int main(int argc, char *argv[])
{
if (argc < 4) {
printf("usage %s ip port filename(of file to send)\n", argv[0]);
exit(0);
}
new_keys();
printf("OUR ID: ");
uint32_t i;
for(i = 0; i < 32; i++) {
if(self_public_key[i] < 16)
printf("0");
printf("%hhX",self_public_key[i]);
}
printf("\n");
memcpy(self_client_id, self_public_key, 32);
char temp_id[128];
printf("Enter the client_id of the friend to connect to (32 bytes HEX format):\n");
scanf("%s", temp_id);
uint8_t friend_id[32];
memcpy(friend_id, hex_string_to_bin(temp_id), 32);
/* memcpy(self_client_id, "qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq", 32); */
DHT_addfriend(friend_id);
IP_Port friend_ip;
int connection = -1;
int inconnection = -1;
uint8_t acceptedfriend_public_key[crypto_box_PUBLICKEYBYTES];
int friendrequest = -1;
uint8_t request_data[512];
/* initialize networking
* bind to ip 0.0.0.0:PORT */
IP ip;
ip.i = 0;
init_networking(ip, PORT);
initNetCrypto();
perror("Initialization");
IP_Port bootstrap_ip_port;
bootstrap_ip_port.port = htons(atoi(argv[2]));
bootstrap_ip_port.ip.i = inet_addr(argv[1]);
DHT_bootstrap(bootstrap_ip_port);
IP_Port ip_port;
uint8_t data[MAX_UDP_PACKET_SIZE];
uint32_t length;
uint8_t buffer1[128];
int read1 = 0;
uint8_t buffer2[128];
int read2 = 0;
FILE *file1 = fopen(argv[3], "rb");
if ( file1==NULL ){printf("Error opening file.\n");return 1;}
FILE *file2 = fopen("received.txt", "wb");
if ( file2==NULL ){return 1;}
read1 = fread(buffer1, 1, 128, file1);
while(1) {
while(receivepacket(&ip_port, data, &length) != -1) {
if(rand() % 3 != 1) { /* simulate packet loss */
if(DHT_handlepacket(data, length, ip_port) && LosslessUDP_handlepacket(data, length, ip_port)) {
/* if packet is not recognized */
printf("Received unhandled packet with length: %u\n", length);
} else {
printf("Received handled packet with length: %u\n", length);
}
}
}
friend_ip = DHT_getfriendip(friend_id);
if(friend_ip.ip.i != 0) {
if(connection == -1 && friendrequest == -1) {
printf("Sending friend request to peer:");
printip(friend_ip);
friendrequest = send_friendrequest(friend_id, friend_ip,(uint8_t *) "Hello World", 12);
/* connection = crypto_connect((uint8_t *)friend_id, friend_ip); */
/* connection = new_connection(friend_ip); */
}
if(check_friendrequest(friendrequest) == 1) {
printf("Started connecting to friend:");
connection = crypto_connect(friend_id, friend_ip);
}
}
if(inconnection == -1) {
uint8_t secret_nonce[crypto_box_NONCEBYTES];
uint8_t public_key[crypto_box_PUBLICKEYBYTES];
uint8_t session_key[crypto_box_PUBLICKEYBYTES];
inconnection = crypto_inbound(public_key, secret_nonce, session_key);
inconnection = accept_crypto_inbound(inconnection, acceptedfriend_public_key, secret_nonce, session_key);
/* inconnection = incoming_connection(); */
if(inconnection != -1) {
printf("Someone connected to us:\n");
/* printip(connection_ip(inconnection)); */
}
}
if(handle_friendrequest(acceptedfriend_public_key, request_data) > 1) {
printf("RECIEVED FRIEND REQUEST: %s\n", request_data);
}
/* if someone connected to us write what he sends to a file
* also send him our file. */
if(inconnection != -1) {
if(write_cryptpacket(inconnection, buffer1, read1)) {
printf("Wrote data1.\n");
read1 = fread(buffer1, 1, 128, file1);
}
read2 = read_cryptpacket(inconnection, buffer2);
if(read2 != 0) {
printf("Received data1.\n");
if(!fwrite(buffer2, read2, 1, file2)) {
printf("file write error1\n");
}
if(read2 < 128) {
printf("Closed file1 %u\n", read2);
fclose(file2);
}
}
/* if buffer is empty and the connection timed out. */
else if(is_cryptoconnected(inconnection) == 4) {
crypto_kill(inconnection);
}
}
/* if we are connected to a friend send him data from the file.
* also put what he sends us in a file. */
if(is_cryptoconnected(connection) >= 3) {
if(write_cryptpacket(0, buffer1, read1)) {
printf("Wrote data2.\n");
read1 = fread(buffer1, 1, 128, file1);
}
read2 = read_cryptpacket(0, buffer2);
if(read2 != 0) {
printf("Received data2.\n");
if(!fwrite(buffer2, read2, 1, file2)) {
printf("file write error2\n");
}
if(read2 < 128) {
printf("Closed file2 %u\n", read2);
fclose(file2);
}
}
/* if buffer is empty and the connection timed out. */
else if(is_cryptoconnected(connection) == 4) {
crypto_kill(connection);
}
}
doDHT();
doLossless_UDP();
doNetCrypto();
/*print_clientlist();
*print_friendlist();
*c_sleep(300); */
c_sleep(1);
}
shutdown_networking();
return 0;
}
//TODO: make this function not suck.
static void doFriends(void)
{
/* TODO: add incoming connections and some other stuff. */
uint32_t i;
int len;
uint8_t temp[MAX_DATA_SIZE];
for (i = 0; i < numfriends; ++i) {
if (friendlist[i].status == FRIEND_ADDED) {
int fr = send_friendrequest(friendlist[i].client_id, friendlist[i].info, friendlist[i].info_size);
if (fr == 0) /* TODO: This needs to be fixed so that it sends the friend requests a couple of times in case of packet loss */
set_friend_status(i, FRIEND_REQUESTED);
else if (fr > 0)
set_friend_status(i, FRIEND_REQUESTED);
}
if (friendlist[i].status == FRIEND_REQUESTED || friendlist[i].status == FRIEND_CONFIRMED) { /* friend is not online */
if (friendlist[i].status == FRIEND_REQUESTED) {
if (friendlist[i].friend_request_id + 10 < unix_time()) { /*I know this is hackish but it should work.*/
send_friendrequest(friendlist[i].client_id, friendlist[i].info, friendlist[i].info_size);
friendlist[i].friend_request_id = unix_time();
}
}
IP_Port friendip = DHT_getfriendip(friendlist[i].client_id);
switch (is_cryptoconnected(friendlist[i].crypt_connection_id)) {
case 0:
if (friendip.ip.i > 1)
friendlist[i].crypt_connection_id = crypto_connect(friendlist[i].client_id, friendip);
break;
case 3: /* Connection is established */
set_friend_status(i, FRIEND_ONLINE);
friendlist[i].name_sent = 0;
friendlist[i].userstatus_sent = 0;
friendlist[i].statusmessage_sent = 0;
break;
case 4:
crypto_kill(friendlist[i].crypt_connection_id);
friendlist[i].crypt_connection_id = -1;
break;
default:
break;
}
}
while (friendlist[i].status == FRIEND_ONLINE) { /* friend is online */
if (friendlist[i].name_sent == 0) {
if (m_sendname(i, self_name, self_name_length))
friendlist[i].name_sent = 1;
}
if (friendlist[i].statusmessage_sent == 0) {
if (send_statusmessage(i, self_statusmessage, self_statusmessage_length))
friendlist[i].statusmessage_sent = 1;
}
if (friendlist[i].userstatus_sent == 0) {
if (send_userstatus(i, self_userstatus))
friendlist[i].userstatus_sent = 1;
}
len = read_cryptpacket(friendlist[i].crypt_connection_id, temp);
uint8_t packet_id = temp[0];
uint8_t* data = temp + 1;
int data_length = len - 1;
if (len > 0) {
switch (packet_id) {
case PACKET_ID_NICKNAME: {
if (data_length >= MAX_NAME_LENGTH || data_length == 0)
break;
if(friend_namechange_isset)
friend_namechange(i, data, data_length);
memcpy(friendlist[i].name, data, data_length);
friendlist[i].name[data_length - 1] = 0; /* make sure the NULL terminator is present. */
break;
}
case PACKET_ID_STATUSMESSAGE: {
if (data_length == 0)
break;
uint8_t *status = calloc(MIN(data_length, MAX_STATUSMESSAGE_LENGTH), 1);
memcpy(status, data, MIN(data_length, MAX_STATUSMESSAGE_LENGTH));
if (friend_statusmessagechange_isset)
friend_statusmessagechange(i, status, MIN(data_length, MAX_STATUSMESSAGE_LENGTH));
set_friend_statusmessage(i, status, MIN(data_length, MAX_STATUSMESSAGE_LENGTH));
free(status);
break;
}
case PACKET_ID_USERSTATUS: {
if (data_length != 1)
break;
USERSTATUS status = data[0];
if (friend_userstatuschange_isset)
friend_userstatuschange(i, status);
set_friend_userstatus(i, status);
break;
}
case PACKET_ID_MESSAGE: {
uint8_t *message_id = data;
uint8_t message_id_length = 4;
uint8_t *message = data + message_id_length;
uint16_t message_length = data_length - message_id_length;
if (friendlist[i].receives_read_receipts) {
write_cryptpacket_id(i, PACKET_ID_RECEIPT, message_id, message_id_length);
}
if (friend_message_isset)
(*friend_message)(i, message, message_length);
break;
}
case PACKET_ID_ACTION: {
if (friend_action_isset)
(*friend_action)(i, data, data_length);
break;
}
case PACKET_ID_RECEIPT: {
uint32_t msgid;
if (data_length < sizeof(msgid))
break;
memcpy(&msgid, data, sizeof(msgid));
msgid = ntohl(msgid);
if (read_receipt_isset)
(*read_receipt)(i, msgid);
break;
}
}
} else {
if (is_cryptoconnected(friendlist[i].crypt_connection_id) == 4) { /* if the connection timed out, kill it */
crypto_kill(friendlist[i].crypt_connection_id);
friendlist[i].crypt_connection_id = -1;
set_friend_status(i, FRIEND_CONFIRMED);
}
break;
}
}
}
}
//TODO: make this function not suck.
static void doFriends()
{
/* TODO: add incoming connections and some other stuff. */
uint32_t i;
int len;
uint8_t temp[MAX_DATA_SIZE];
for (i = 0; i < numfriends; ++i) {
if (friendlist[i].status == 1) {
int fr = send_friendrequest(friendlist[i].client_id, friendlist[i].info, friendlist[i].info_size);
if (fr == 0) /* TODO: This needs to be fixed so that it sends the friend requests a couple of times in case of packet loss */
friendlist[i].status = 2;
else if (fr > 0)
friendlist[i].status = 2;
}
if (friendlist[i].status == 2 || friendlist[i].status == 3) { /* friend is not online */
if (friendlist[i].status == 2) {
if (friendlist[i].friend_request_id + 10 < unix_time()) { /*I know this is hackish but it should work.*/
send_friendrequest(friendlist[i].client_id, friendlist[i].info, friendlist[i].info_size);
friendlist[i].friend_request_id = unix_time();
}
}
IP_Port friendip = DHT_getfriendip(friendlist[i].client_id);
switch (is_cryptoconnected(friendlist[i].crypt_connection_id)) {
case 0:
if (friendip.ip.i > 1)
friendlist[i].crypt_connection_id = crypto_connect(friendlist[i].client_id, friendip);
break;
case 3: /* Connection is established */
friendlist[i].status = 4;
break;
case 4:
crypto_kill(friendlist[i].crypt_connection_id);
friendlist[i].crypt_connection_id = -1;
break;
default:
break;
}
}
while (friendlist[i].status == 4) { /* friend is online */
if (friendlist[i].name_sent == 0) {
if (m_sendname(i, self_name, self_name_length))
friendlist[i].name_sent = 1;
}
if (friendlist[i].userstatus_sent == 0) {
if (send_userstatus(i, self_userstatus, self_userstatus_len))
friendlist[i].userstatus_sent = 1;
}
len = read_cryptpacket(friendlist[i].crypt_connection_id, temp);
if (len > 0) {
switch (temp[0]) {
case PACKET_ID_NICKNAME: {
if (len >= MAX_NAME_LENGTH + 1 || len == 1)
break;
if(friend_namechange_isset)
friend_namechange(i, temp + 1, len - 1);
memcpy(friendlist[i].name, temp + 1, len - 1);
friendlist[i].name[len - 2] = 0; /* make sure the NULL terminator is present. */
break;
}
case PACKET_ID_USERSTATUS: {
uint8_t *status = calloc(MIN(len - 1, MAX_USERSTATUS_LENGTH), 1);
memcpy(status, temp + 1, MIN(len - 1, MAX_USERSTATUS_LENGTH));
if (friend_statuschange_isset)
friend_statuschange(i, status, MIN(len - 1, MAX_USERSTATUS_LENGTH));
set_friend_userstatus(i, status, MIN(len - 1, MAX_USERSTATUS_LENGTH));
free(status);
break;
}
case PACKET_ID_MESSAGE: {
if (friend_message_isset)
(*friend_message)(i, temp + 1, len - 1);
break;
}
}
} else {
if (is_cryptoconnected(friendlist[i].crypt_connection_id) == 4) { /* if the connection timed out, kill it */
crypto_kill(friendlist[i].crypt_connection_id);
friendlist[i].crypt_connection_id = -1;
friendlist[i].status = 3;
}
break;
}
}
}
}
//TODO: make this function not suck.
void doFriends(Messenger *m)
{
/* TODO: add incoming connections and some other stuff. */
uint32_t i;
int len;
uint8_t temp[MAX_DATA_SIZE];
uint64_t temp_time = unix_time();
for (i = 0; i < m->numfriends; ++i) {
if (m->friendlist[i].status == FRIEND_ADDED) {
int fr = send_friendrequest(m->friendlist[i].client_id, m->friendlist[i].friendrequest_nospam, m->friendlist[i].info,
m->friendlist[i].info_size);
if (fr >= 0) {
set_friend_status(m, i, FRIEND_REQUESTED);
m->friendlist[i].friendrequest_lastsent = temp_time;
}
}
if (m->friendlist[i].status == FRIEND_REQUESTED
|| m->friendlist[i].status == FRIEND_CONFIRMED) { /* friend is not online */
if (m->friendlist[i].status == FRIEND_REQUESTED) {
/* If we didn't connect to friend after successfully sending him a friend request the request is deemed
unsuccessful so we set the status back to FRIEND_ADDED and try again.*/
if (m->friendlist[i].friendrequest_lastsent + m->friendlist[i].friendrequest_timeout < temp_time) {
set_friend_status(m, i, FRIEND_ADDED);
/* Double the default timeout everytime if friendrequest is assumed to have been
sent unsuccessfully. */
m->friendlist[i].friendrequest_timeout *= 2;
}
}
IP_Port friendip = DHT_getfriendip(m->friendlist[i].client_id);
switch (is_cryptoconnected(m->friendlist[i].crypt_connection_id)) {
case 0:
if (friendip.ip.i > 1)
m->friendlist[i].crypt_connection_id = crypto_connect(m->friendlist[i].client_id, friendip);
break;
case 3: /* Connection is established */
set_friend_status(m, i, FRIEND_ONLINE);
m->friendlist[i].name_sent = 0;
m->friendlist[i].userstatus_sent = 0;
m->friendlist[i].statusmessage_sent = 0;
m->friendlist[i].ping_lastrecv = temp_time;
break;
case 4:
crypto_kill(m->friendlist[i].crypt_connection_id);
m->friendlist[i].crypt_connection_id = -1;
break;
default:
break;
}
}
while (m->friendlist[i].status == FRIEND_ONLINE) { /* friend is online */
if (m->friendlist[i].name_sent == 0) {
if (m_sendname(m, i, m->name, m->name_length))
m->friendlist[i].name_sent = 1;
}
if (m->friendlist[i].statusmessage_sent == 0) {
if (send_statusmessage(m, i, m->statusmessage, m->statusmessage_length))
m->friendlist[i].statusmessage_sent = 1;
}
if (m->friendlist[i].userstatus_sent == 0) {
if (send_userstatus(m, i, m->userstatus))
m->friendlist[i].userstatus_sent = 1;
}
if (m->friendlist[i].ping_lastsent + FRIEND_PING_INTERVAL < temp_time) {
send_ping(m, i);
}
len = read_cryptpacket(m->friendlist[i].crypt_connection_id, temp);
uint8_t packet_id = temp[0];
uint8_t *data = temp + 1;
int data_length = len - 1;
if (len > 0) {
switch (packet_id) {
case PACKET_ID_PING: {
m->friendlist[i].ping_lastrecv = temp_time;
break;
}
case PACKET_ID_NICKNAME: {
if (data_length >= MAX_NAME_LENGTH || data_length == 0)
break;
if (m->friend_namechange)
m->friend_namechange(m, i, data, data_length, m->friend_namechange_userdata);
memcpy(m->friendlist[i].name, data, data_length);
m->friendlist[i].name[data_length - 1] = 0; /* make sure the NULL terminator is present. */
break;
}
case PACKET_ID_STATUSMESSAGE: {
if (data_length == 0)
break;
uint8_t *status = calloc(MIN(data_length, MAX_STATUSMESSAGE_LENGTH), 1);
memcpy(status, data, MIN(data_length, MAX_STATUSMESSAGE_LENGTH));
if (m->friend_statusmessagechange)
m->friend_statusmessagechange(m, i, status, MIN(data_length, MAX_STATUSMESSAGE_LENGTH),
m->friend_statuschange_userdata);
set_friend_statusmessage(m, i, status, MIN(data_length, MAX_STATUSMESSAGE_LENGTH));
free(status);
break;
}
case PACKET_ID_USERSTATUS: {
if (data_length != 1)
break;
USERSTATUS status = data[0];
if (m->friend_userstatuschange)
m->friend_userstatuschange(m, i, status, m->friend_userstatuschange_userdata);
set_friend_userstatus(m, i, status);
break;
}
case PACKET_ID_MESSAGE: {
uint8_t *message_id = data;
uint8_t message_id_length = 4;
uint8_t *message = data + message_id_length;
uint16_t message_length = data_length - message_id_length;
if (m->friendlist[i].receives_read_receipts) {
write_cryptpacket_id(m, i, PACKET_ID_RECEIPT, message_id, message_id_length);
}
if (m->friend_message)
(*m->friend_message)(m, i, message, message_length, m->friend_message_userdata);
break;
}
case PACKET_ID_ACTION: {
if (m->friend_action)
(*m->friend_action)(m, i, data, data_length, m->friend_action_userdata);
break;
}
case PACKET_ID_RECEIPT: {
uint32_t msgid;
if (data_length < sizeof(msgid))
break;
memcpy(&msgid, data, sizeof(msgid));
msgid = ntohl(msgid);
if (m->read_receipt)
(*m->read_receipt)(m, i, msgid, m->read_receipt_userdata);
break;
}
}
} else {
if (is_cryptoconnected(m->friendlist[i].crypt_connection_id) == 4) { /* if the connection timed out, kill it */
crypto_kill(m->friendlist[i].crypt_connection_id);
m->friendlist[i].crypt_connection_id = -1;
set_friend_status(m, i, FRIEND_CONFIRMED);
}
break;
}
if (m->friendlist[i].ping_lastrecv + FRIEND_CONNECTION_TIMEOUT < temp_time) {
/* if we stopped recieving ping packets kill it */
crypto_kill(m->friendlist[i].crypt_connection_id);
m->friendlist[i].crypt_connection_id = -1;
set_friend_status(m, i, FRIEND_CONFIRMED);
}
}
}
}