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Merge pull request #111 from nfkd/patch-3

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Fix braces and a few whitespaces
This commit is contained in:
irungentoo 2013-07-26 18:57:42 -07:00
commit 792a02e9f6
1 changed files with 170 additions and 300 deletions
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382
core/DHT.c
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@ -94,15 +94,12 @@ int id_closest(uint8_t * client_id, uint8_t * client_id1, uint8_t * client_id2)
{ {
uint32_t i; uint32_t i;
for(i = 0; i < CLIENT_ID_SIZE; ++i) { for(i = 0; i < CLIENT_ID_SIZE; ++i) {
if(abs(client_id[i] ^ client_id1[i]) < abs(client_id[i] ^ client_id2[i])) { if(abs(client_id[i] ^ client_id1[i]) < abs(client_id[i] ^ client_id2[i]))
return 1; return 1;
} else if(abs(client_id[i] ^ client_id1[i]) > abs(client_id[i] ^ client_id2[i])) { else if(abs(client_id[i] ^ client_id1[i]) > abs(client_id[i] ^ client_id2[i]))
return 2; return 2;
} }
}
return 0; return 0;
} }
/* check if client with client_id is already in list of length length. /* check if client with client_id is already in list of length length.
@ -139,14 +136,10 @@ int client_in_list(Client_data * list, uint32_t length, uint8_t * client_id, IP_
int client_in_nodelist(Node_format * list, uint32_t length, uint8_t * client_id) int client_in_nodelist(Node_format * list, uint32_t length, uint8_t * client_id)
{ {
uint32_t i; uint32_t i;
for(i = 0; i < length; ++i) { for(i = 0; i < length; ++i)
if(memcmp(list[i].client_id, client_id, CLIENT_ID_SIZE) == 0) { if(memcmp(list[i].client_id, client_id, CLIENT_ID_SIZE) == 0)
return 1; return 1;
}
}
return 0; return 0;
} }
/*Return the friend number from the client_id /*Return the friend number from the client_id
@ -154,12 +147,9 @@ int client_in_nodelist(Node_format * list, uint32_t length, uint8_t * client_id)
static int friend_number(uint8_t * client_id) static int friend_number(uint8_t * client_id)
{ {
uint32_t i; uint32_t i;
for(i = 0; i < num_friends; ++i) { for(i = 0; i < num_friends; ++i)
if(memcmp(friends_list[i].client_id, client_id, CLIENT_ID_SIZE) == 0) /* Equal */ if(memcmp(friends_list[i].client_id, client_id, CLIENT_ID_SIZE) == 0) /* Equal */
{
return i; return i;
}
}
return -1; return -1;
} }
@ -176,7 +166,7 @@ int get_close_nodes(uint8_t * client_id, Node_format * nodes_list)
uint32_t i, j, k; uint32_t i, j, k;
int num_nodes=0; int num_nodes=0;
uint32_t temp_time = unix_time(); uint32_t temp_time = unix_time();
for(i = 0; i < LCLIENT_LIST; ++i) { for(i = 0; i < LCLIENT_LIST; ++i)
if(close_clientlist[i].timestamp + BAD_NODE_TIMEOUT > temp_time && if(close_clientlist[i].timestamp + BAD_NODE_TIMEOUT > temp_time &&
!client_in_nodelist(nodes_list, MAX_SENT_NODES,close_clientlist[i].client_id)) { !client_in_nodelist(nodes_list, MAX_SENT_NODES,close_clientlist[i].client_id)) {
/* if node is good and not already in list. */ /* if node is good and not already in list. */
@ -185,17 +175,16 @@ int get_close_nodes(uint8_t * client_id, Node_format * nodes_list)
nodes_list[num_nodes].ip_port = close_clientlist[i].ip_port; nodes_list[num_nodes].ip_port = close_clientlist[i].ip_port;
num_nodes++; num_nodes++;
} }
else for(j = 0; j < MAX_SENT_NODES; ++j) { else for(j = 0; j < MAX_SENT_NODES; ++j)
if(id_closest(client_id, nodes_list[j].client_id, close_clientlist[i].client_id) == 2) { if(id_closest(client_id, nodes_list[j].client_id, close_clientlist[i].client_id) == 2) {
memcpy(nodes_list[j].client_id, close_clientlist[i].client_id, CLIENT_ID_SIZE); memcpy(nodes_list[j].client_id, close_clientlist[i].client_id, CLIENT_ID_SIZE);
nodes_list[j].ip_port = close_clientlist[i].ip_port; nodes_list[j].ip_port = close_clientlist[i].ip_port;
break; break;
} }
} }
}
} for(i = 0; i < num_friends; ++i)
for(i = 0; i < num_friends; ++i) { for(j = 0; j < MAX_FRIEND_CLIENTS; ++j)
for(j = 0; j < MAX_FRIEND_CLIENTS; ++j) {
if(friends_list[i].client_list[j].timestamp + BAD_NODE_TIMEOUT > temp_time && if(friends_list[i].client_list[j].timestamp + BAD_NODE_TIMEOUT > temp_time &&
!client_in_nodelist(nodes_list, MAX_SENT_NODES,friends_list[i].client_list[j].client_id)) { !client_in_nodelist(nodes_list, MAX_SENT_NODES,friends_list[i].client_list[j].client_id)) {
/* if node is good and not already in list. */ /* if node is good and not already in list. */
@ -203,17 +192,13 @@ int get_close_nodes(uint8_t * client_id, Node_format * nodes_list)
memcpy(nodes_list[num_nodes].client_id, friends_list[i].client_list[j].client_id, CLIENT_ID_SIZE); memcpy(nodes_list[num_nodes].client_id, friends_list[i].client_list[j].client_id, CLIENT_ID_SIZE);
nodes_list[num_nodes].ip_port = friends_list[i].client_list[j].ip_port; nodes_list[num_nodes].ip_port = friends_list[i].client_list[j].ip_port;
num_nodes++; num_nodes++;
} else for(k = 0; k < MAX_SENT_NODES; ++k) { } else for(k = 0; k < MAX_SENT_NODES; ++k)
if(id_closest(client_id, nodes_list[k].client_id, friends_list[i].client_list[j].client_id) == 2) { if(id_closest(client_id, nodes_list[k].client_id, friends_list[i].client_list[j].client_id) == 2) {
memcpy(nodes_list[k].client_id, friends_list[i].client_list[j].client_id, CLIENT_ID_SIZE); memcpy(nodes_list[k].client_id, friends_list[i].client_list[j].client_id, CLIENT_ID_SIZE);
nodes_list[k].ip_port = friends_list[i].client_list[j].ip_port; nodes_list[k].ip_port = friends_list[i].client_list[j].ip_port;
break; break;
} }
} }
}
}
}
return num_nodes; return num_nodes;
} }
@ -224,7 +209,7 @@ int replace_bad(Client_data * list, uint32_t length, uint8_t * client_id, IP_Por
{ {
uint32_t i; uint32_t i;
uint32_t temp_time = unix_time(); uint32_t temp_time = unix_time();
for(i = 0; i < length; ++i) { for(i = 0; i < length; ++i)
if(list[i].timestamp + BAD_NODE_TIMEOUT < temp_time) /* if node is bad. */ { if(list[i].timestamp + BAD_NODE_TIMEOUT < temp_time) /* if node is bad. */ {
memcpy(list[i].client_id, client_id, CLIENT_ID_SIZE); memcpy(list[i].client_id, client_id, CLIENT_ID_SIZE);
list[i].ip_port = ip_port; list[i].ip_port = ip_port;
@ -234,9 +219,8 @@ int replace_bad(Client_data * list, uint32_t length, uint8_t * client_id, IP_Por
list[i].ret_timestamp = 0; list[i].ret_timestamp = 0;
return 0; return 0;
} }
}
return 1;
return 1;
} }
/* replace the first good node that is further to the comp_client_id than that of the client_id in the list */ /* replace the first good node that is further to the comp_client_id than that of the client_id in the list */
@ -245,7 +229,7 @@ int replace_good(Client_data * list, uint32_t length, uint8_t * client_id, IP_Po
uint32_t i; uint32_t i;
uint32_t temp_time = unix_time(); uint32_t temp_time = unix_time();
for(i = 0; i < length; ++i) { for(i = 0; i < length; ++i)
if(id_closest(comp_client_id, list[i].client_id, client_id) == 2) { if(id_closest(comp_client_id, list[i].client_id, client_id) == 2) {
memcpy(list[i].client_id, client_id, CLIENT_ID_SIZE); memcpy(list[i].client_id, client_id, CLIENT_ID_SIZE);
list[i].ip_port = ip_port; list[i].ip_port = ip_port;
@ -255,9 +239,8 @@ int replace_good(Client_data * list, uint32_t length, uint8_t * client_id, IP_Po
list[i].ret_timestamp = 0; list[i].ret_timestamp = 0;
return 0; return 0;
} }
}
return 1;
return 1;
} }
/* Attempt to add client with ip_port and client_id to the friends client list and close_clientlist */ /* Attempt to add client with ip_port and client_id to the friends client list and close_clientlist */
@ -266,22 +249,17 @@ void addto_lists(IP_Port ip_port, uint8_t * client_id)
uint32_t i; uint32_t i;
/* NOTE: current behavior if there are two clients with the same id is to replace the first ip by the second. */ /* NOTE: current behavior if there are two clients with the same id is to replace the first ip by the second. */
if(!client_in_list(close_clientlist, LCLIENT_LIST, client_id, ip_port)) { if(!client_in_list(close_clientlist, LCLIENT_LIST, client_id, ip_port))
if(replace_bad(close_clientlist, LCLIENT_LIST, client_id, ip_port))
if(replace_bad(close_clientlist, LCLIENT_LIST, client_id, ip_port)) {
/* if we can't replace bad nodes we try replacing good ones */ /* if we can't replace bad nodes we try replacing good ones */
replace_good(close_clientlist, LCLIENT_LIST, client_id, ip_port, self_public_key); replace_good(close_clientlist, LCLIENT_LIST, client_id, ip_port, self_public_key);
}
} for(i = 0; i < num_friends; ++i)
for(i = 0; i < num_friends; ++i) { if(!client_in_list(friends_list[i].client_list, MAX_FRIEND_CLIENTS, client_id, ip_port))
if(!client_in_list(friends_list[i].client_list, MAX_FRIEND_CLIENTS, client_id, ip_port)) { if(replace_bad(friends_list[i].client_list, MAX_FRIEND_CLIENTS, client_id, ip_port))
if(replace_bad(friends_list[i].client_list, MAX_FRIEND_CLIENTS, client_id, ip_port)) {
/* if we can't replace bad nodes we try replacing good ones. */ /* if we can't replace bad nodes we try replacing good ones. */
replace_good(friends_list[i].client_list, MAX_FRIEND_CLIENTS, client_id, ip_port, friends_list[i].client_id); replace_good(friends_list[i].client_list, MAX_FRIEND_CLIENTS, client_id, ip_port, friends_list[i].client_id);
} }
}
}
}
/* If client_id is a friend or us, update ret_ip_port /* If client_id is a friend or us, update ret_ip_port
nodeclient_id is the id of the node that sent us this info */ nodeclient_id is the id of the node that sent us this info */
@ -290,27 +268,22 @@ void returnedip_ports(IP_Port ip_port, uint8_t * client_id, uint8_t * nodeclient
uint32_t i, j; uint32_t i, j;
uint32_t temp_time = unix_time(); uint32_t temp_time = unix_time();
if(memcmp(client_id, self_public_key, CLIENT_ID_SIZE) == 0) { if(memcmp(client_id, self_public_key, CLIENT_ID_SIZE) == 0) {
for(i = 0; i < LCLIENT_LIST; ++i) { for(i = 0; i < LCLIENT_LIST; ++i)
if(memcmp(nodeclient_id, close_clientlist[i].client_id, CLIENT_ID_SIZE) == 0) { if(memcmp(nodeclient_id, close_clientlist[i].client_id, CLIENT_ID_SIZE) == 0) {
close_clientlist[i].ret_ip_port = ip_port; close_clientlist[i].ret_ip_port = ip_port;
close_clientlist[i].ret_timestamp = temp_time; close_clientlist[i].ret_timestamp = temp_time;
return; return;
} }
} } else
} for(i = 0; i < num_friends; ++i)
else if(memcmp(client_id, friends_list[i].client_id, CLIENT_ID_SIZE) == 0)
for(i = 0; i < num_friends; ++i) { for(j = 0; j < MAX_FRIEND_CLIENTS; ++j)
if(memcmp(client_id, friends_list[i].client_id, CLIENT_ID_SIZE) == 0) {
for(j = 0; j < MAX_FRIEND_CLIENTS; ++j) {
if(memcmp(nodeclient_id, friends_list[i].client_list[j].client_id, CLIENT_ID_SIZE) == 0) { if(memcmp(nodeclient_id, friends_list[i].client_list[j].client_id, CLIENT_ID_SIZE) == 0) {
friends_list[i].client_list[j].ret_ip_port = ip_port; friends_list[i].client_list[j].ret_ip_port = ip_port;
friends_list[i].client_list[j].ret_timestamp = temp_time; friends_list[i].client_list[j].ret_timestamp = temp_time;
return; return;
} }
} }
}
}
}
/* ping timeout in seconds */ /* ping timeout in seconds */
#define PING_TIMEOUT 5 #define PING_TIMEOUT 5
@ -326,30 +299,21 @@ int is_pinging(IP_Port ip_port, uint64_t ping_id)
uint8_t pinging; uint8_t pinging;
uint32_t temp_time = unix_time(); uint32_t temp_time = unix_time();
for(i = 0; i < LPING_ARRAY; ++i ) { for(i = 0; i < LPING_ARRAY; ++i )
if((pings[i].timestamp + PING_TIMEOUT) > temp_time) { if((pings[i].timestamp + PING_TIMEOUT) > temp_time) {
pinging = 0; pinging = 0;
if(ip_port.ip.i != 0) { if(ip_port.ip.i != 0)
if(pings[i].ip_port.ip.i == ip_port.ip.i && if(pings[i].ip_port.ip.i == ip_port.ip.i &&
pings[i].ip_port.port == ip_port.port) { pings[i].ip_port.port == ip_port.port)
++pinging; ++pinging;
} if(ping_id != 0)
}
if(ping_id != 0) {
if(pings[i].ping_id == ping_id) if(pings[i].ping_id == ping_id)
{
++pinging; ++pinging;
} if(pinging == (ping_id != 0) + (ip_port.ip.i != 0))
}
if(pinging == (ping_id != 0) + (ip_port.ip.i != 0)) {
return 1; return 1;
} }
}
}
return 0; return 0;
} }
/* Same as last function but for get_node requests. */ /* Same as last function but for get_node requests. */
@ -359,29 +323,22 @@ int is_gettingnodes(IP_Port ip_port, uint64_t ping_id)
uint8_t pinging; uint8_t pinging;
uint32_t temp_time = unix_time(); uint32_t temp_time = unix_time();
for(i = 0; i < LSEND_NODES_ARRAY; ++i ) { for(i = 0; i < LSEND_NODES_ARRAY; ++i )
if((send_nodes[i].timestamp + PING_TIMEOUT) > temp_time) { if((send_nodes[i].timestamp + PING_TIMEOUT) > temp_time) {
pinging = 0; pinging = 0;
if(ip_port.ip.i != 0) { if(ip_port.ip.i != 0)
if(send_nodes[i].ip_port.ip.i == ip_port.ip.i && if(send_nodes[i].ip_port.ip.i == ip_port.ip.i &&
send_nodes[i].ip_port.port == ip_port.port) { send_nodes[i].ip_port.port == ip_port.port)
++pinging; ++pinging;
} if(ping_id != 0)
} if(send_nodes[i].ping_id == ping_id)
if(ping_id != 0) {
if(send_nodes[i].ping_id == ping_id) {
++pinging; ++pinging;
} if(pinging == (ping_id != 0) + (ip_port.ip.i != 0))
}
if(pinging == (ping_id != 0) + (ip_port.ip.i != 0)) {
return 1; return 1;
}
} }
}
return 0; return 0;
} }
/* Add a new ping request to the list of ping requests /* Add a new ping request to the list of ping requests
@ -394,18 +351,16 @@ uint64_t add_pinging(IP_Port ip_port)
uint64_t ping_id = ((uint64_t)random_int() << 32) + random_int(); uint64_t ping_id = ((uint64_t)random_int() << 32) + random_int();
uint32_t temp_time = unix_time(); uint32_t temp_time = unix_time();
for(i = 0; i < PING_TIMEOUT; ++i ) { for(i = 0; i < PING_TIMEOUT; ++i )
for(j = 0; j < LPING_ARRAY; ++j ) { for(j = 0; j < LPING_ARRAY; ++j )
if((pings[j].timestamp + PING_TIMEOUT - i) < temp_time) { if((pings[j].timestamp + PING_TIMEOUT - i) < temp_time) {
pings[j].timestamp = temp_time; pings[j].timestamp = temp_time;
pings[j].ip_port = ip_port; pings[j].ip_port = ip_port;
pings[j].ping_id = ping_id; pings[j].ping_id = ping_id;
return ping_id; return ping_id;
} }
}
}
return 0;
return 0;
} }
/* Same but for get node requests */ /* Same but for get node requests */
@ -415,36 +370,31 @@ uint64_t add_gettingnodes(IP_Port ip_port)
uint64_t ping_id = ((uint64_t)random_int() << 32) + random_int(); uint64_t ping_id = ((uint64_t)random_int() << 32) + random_int();
uint32_t temp_time = unix_time(); uint32_t temp_time = unix_time();
for(i = 0; i < PING_TIMEOUT; ++i ) { for(i = 0; i < PING_TIMEOUT; ++i )
for(j = 0; j < LSEND_NODES_ARRAY; ++j ) { for(j = 0; j < LSEND_NODES_ARRAY; ++j )
if((send_nodes[j].timestamp + PING_TIMEOUT - i) < temp_time) { if((send_nodes[j].timestamp + PING_TIMEOUT - i) < temp_time) {
send_nodes[j].timestamp = temp_time; send_nodes[j].timestamp = temp_time;
send_nodes[j].ip_port = ip_port; send_nodes[j].ip_port = ip_port;
send_nodes[j].ping_id = ping_id; send_nodes[j].ping_id = ping_id;
return ping_id; return ping_id;
} }
}
}
return 0;
return 0;
} }
/* send a ping request /* send a ping request
Ping request only works if none has been sent to that ip/port in the last 5 seconds. */ Ping request only works if none has been sent to that ip/port in the last 5 seconds. */
static int pingreq(IP_Port ip_port, uint8_t * public_key) static int pingreq(IP_Port ip_port, uint8_t * public_key)
{ {
if(memcmp(public_key, self_public_key, CLIENT_ID_SIZE) == 0) /* check if packet is gonna be sent to ourself */ { if(memcmp(public_key, self_public_key, CLIENT_ID_SIZE) == 0) /* check if packet is gonna be sent to ourself */
return 1; return 1;
}
if(is_pinging(ip_port, 0)) { if(is_pinging(ip_port, 0))
return 1; return 1;
}
uint64_t ping_id = add_pinging(ip_port); uint64_t ping_id = add_pinging(ip_port);
if(ping_id == 0) { if(ping_id == 0)
return 1; return 1;
}
uint8_t data[1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id) + ENCRYPTION_PADDING]; uint8_t data[1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id) + ENCRYPTION_PADDING];
uint8_t encrypt[sizeof(ping_id) + ENCRYPTION_PADDING]; uint8_t encrypt[sizeof(ping_id) + ENCRYPTION_PADDING];
@ -452,25 +402,22 @@ static int pingreq(IP_Port ip_port, uint8_t * public_key)
random_nonce(nonce); random_nonce(nonce);
int len = encrypt_data(public_key, self_secret_key, nonce, (uint8_t *)&ping_id, sizeof(ping_id), encrypt); int len = encrypt_data(public_key, self_secret_key, nonce, (uint8_t *)&ping_id, sizeof(ping_id), encrypt);
if(len != sizeof(ping_id) + ENCRYPTION_PADDING) { if(len != sizeof(ping_id) + ENCRYPTION_PADDING)
return -1; return -1;
}
data[0] = 0; data[0] = 0;
memcpy(data + 1, self_public_key, CLIENT_ID_SIZE); memcpy(data + 1, self_public_key, CLIENT_ID_SIZE);
memcpy(data + 1 + CLIENT_ID_SIZE, nonce, crypto_box_NONCEBYTES); memcpy(data + 1 + CLIENT_ID_SIZE, nonce, crypto_box_NONCEBYTES);
memcpy(data + 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES, encrypt, len); memcpy(data + 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES, encrypt, len);
return sendpacket(ip_port, data, sizeof(data)); return sendpacket(ip_port, data, sizeof(data));
} }
/* send a ping response */ /* send a ping response */
static int pingres(IP_Port ip_port, uint8_t * public_key, uint64_t ping_id) static int pingres(IP_Port ip_port, uint8_t * public_key, uint64_t ping_id)
{ {
/* check if packet is gonna be sent to ourself */ /* check if packet is gonna be sent to ourself */
if(memcmp(public_key, self_public_key, CLIENT_ID_SIZE) == 0) { if(memcmp(public_key, self_public_key, CLIENT_ID_SIZE) == 0)
return 1; return 1;
}
uint8_t data[1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id) + ENCRYPTION_PADDING]; uint8_t data[1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id) + ENCRYPTION_PADDING];
uint8_t encrypt[sizeof(ping_id) + ENCRYPTION_PADDING]; uint8_t encrypt[sizeof(ping_id) + ENCRYPTION_PADDING];
@ -478,35 +425,30 @@ static int pingres(IP_Port ip_port, uint8_t * public_key, uint64_t ping_id)
random_nonce(nonce); random_nonce(nonce);
int len = encrypt_data(public_key, self_secret_key, nonce, (uint8_t *)&ping_id, sizeof(ping_id), encrypt); int len = encrypt_data(public_key, self_secret_key, nonce, (uint8_t *)&ping_id, sizeof(ping_id), encrypt);
if(len != sizeof(ping_id) + ENCRYPTION_PADDING) { if(len != sizeof(ping_id) + ENCRYPTION_PADDING)
return -1; return -1;
}
data[0] = 1; data[0] = 1;
memcpy(data + 1, self_public_key, CLIENT_ID_SIZE); memcpy(data + 1, self_public_key, CLIENT_ID_SIZE);
memcpy(data + 1 + CLIENT_ID_SIZE, nonce, crypto_box_NONCEBYTES); memcpy(data + 1 + CLIENT_ID_SIZE, nonce, crypto_box_NONCEBYTES);
memcpy(data + 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES, encrypt, len); memcpy(data + 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES, encrypt, len);
return sendpacket(ip_port, data, sizeof(data)); return sendpacket(ip_port, data, sizeof(data));
} }
/* send a getnodes request */ /* send a getnodes request */
static int getnodes(IP_Port ip_port, uint8_t * public_key, uint8_t * client_id) static int getnodes(IP_Port ip_port, uint8_t * public_key, uint8_t * client_id)
{ {
/* check if packet is gonna be sent to ourself */ /* check if packet is gonna be sent to ourself */
if(memcmp(public_key, self_public_key, CLIENT_ID_SIZE) == 0) { if(memcmp(public_key, self_public_key, CLIENT_ID_SIZE) == 0)
return 1; return 1;
}
if(is_gettingnodes(ip_port, 0)) { if(is_gettingnodes(ip_port, 0))
return 1; return 1;
}
uint64_t ping_id = add_gettingnodes(ip_port); uint64_t ping_id = add_gettingnodes(ip_port);
if(ping_id == 0) { if(ping_id == 0)
return 1; return 1;
}
uint8_t data[1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id) + CLIENT_ID_SIZE + ENCRYPTION_PADDING]; uint8_t data[1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id) + CLIENT_ID_SIZE + ENCRYPTION_PADDING];
uint8_t plain[sizeof(ping_id) + CLIENT_ID_SIZE]; uint8_t plain[sizeof(ping_id) + CLIENT_ID_SIZE];
@ -519,23 +461,20 @@ static int getnodes(IP_Port ip_port, uint8_t * public_key, uint8_t * client_id)
int len = encrypt_data(public_key, self_secret_key, nonce, plain, sizeof(ping_id) + CLIENT_ID_SIZE, encrypt); int len = encrypt_data(public_key, self_secret_key, nonce, plain, sizeof(ping_id) + CLIENT_ID_SIZE, encrypt);
if(len != sizeof(ping_id) + CLIENT_ID_SIZE + ENCRYPTION_PADDING) { if(len != sizeof(ping_id) + CLIENT_ID_SIZE + ENCRYPTION_PADDING)
return -1; return -1;
}
data[0] = 2; data[0] = 2;
memcpy(data + 1, self_public_key, CLIENT_ID_SIZE); memcpy(data + 1, self_public_key, CLIENT_ID_SIZE);
memcpy(data + 1 + CLIENT_ID_SIZE, nonce, crypto_box_NONCEBYTES); memcpy(data + 1 + CLIENT_ID_SIZE, nonce, crypto_box_NONCEBYTES);
memcpy(data + 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES, encrypt, len); memcpy(data + 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES, encrypt, len);
return sendpacket(ip_port, data, sizeof(data)); return sendpacket(ip_port, data, sizeof(data));
} }
/* send a send nodes response */ /* send a send nodes response */
static int sendnodes(IP_Port ip_port, uint8_t * public_key, uint8_t * client_id, uint64_t ping_id) static int sendnodes(IP_Port ip_port, uint8_t * public_key, uint8_t * client_id, uint64_t ping_id)
{ {
if(memcmp(public_key, self_public_key, CLIENT_ID_SIZE) == 0) /* check if packet is gonna be sent to ourself */ { if(memcmp(public_key, self_public_key, CLIENT_ID_SIZE) == 0) /* check if packet is gonna be sent to ourself */
return 1; return 1;
}
uint8_t data[1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id) uint8_t data[1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id)
+ sizeof(Node_format) * MAX_SENT_NODES + ENCRYPTION_PADDING]; + sizeof(Node_format) * MAX_SENT_NODES + ENCRYPTION_PADDING];
@ -543,9 +482,8 @@ static int sendnodes(IP_Port ip_port, uint8_t * public_key, uint8_t * client_id,
Node_format nodes_list[MAX_SENT_NODES]; Node_format nodes_list[MAX_SENT_NODES];
int num_nodes = get_close_nodes(client_id, nodes_list); int num_nodes = get_close_nodes(client_id, nodes_list);
if(num_nodes == 0) { if(num_nodes == 0)
return 0; return 0;
}
uint8_t plain[sizeof(ping_id) + sizeof(Node_format) * MAX_SENT_NODES]; uint8_t plain[sizeof(ping_id) + sizeof(Node_format) * MAX_SENT_NODES];
uint8_t encrypt[sizeof(ping_id) + sizeof(Node_format) * MAX_SENT_NODES + ENCRYPTION_PADDING]; uint8_t encrypt[sizeof(ping_id) + sizeof(Node_format) * MAX_SENT_NODES + ENCRYPTION_PADDING];
@ -558,9 +496,8 @@ static int sendnodes(IP_Port ip_port, uint8_t * public_key, uint8_t * client_id,
int len = encrypt_data(public_key, self_secret_key, nonce, plain, int len = encrypt_data(public_key, self_secret_key, nonce, plain,
sizeof(ping_id) + num_nodes * sizeof(Node_format), encrypt); sizeof(ping_id) + num_nodes * sizeof(Node_format), encrypt);
if(len != sizeof(ping_id) + num_nodes * sizeof(Node_format) + ENCRYPTION_PADDING) { if(len != sizeof(ping_id) + num_nodes * sizeof(Node_format) + ENCRYPTION_PADDING)
return -1; return -1;
}
data[0] = 3; data[0] = 3;
memcpy(data + 1, self_public_key, CLIENT_ID_SIZE); memcpy(data + 1, self_public_key, CLIENT_ID_SIZE);
@ -568,7 +505,6 @@ static int sendnodes(IP_Port ip_port, uint8_t * public_key, uint8_t * client_id,
memcpy(data + 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES, encrypt, len); memcpy(data + 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES, encrypt, len);
return sendpacket(ip_port, data, 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + len); return sendpacket(ip_port, data, 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + len);
} }
/* Packet handling functions /* Packet handling functions
@ -577,50 +513,38 @@ static int sendnodes(IP_Port ip_port, uint8_t * public_key, uint8_t * client_id,
int handle_pingreq(uint8_t * packet, uint32_t length, IP_Port source) int handle_pingreq(uint8_t * packet, uint32_t length, IP_Port source)
{ {
uint64_t ping_id; uint64_t ping_id;
if(length != 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id) + ENCRYPTION_PADDING) { if(length != 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id) + ENCRYPTION_PADDING)
return 1; return 1;
}
/* check if packet is from ourself. */ /* check if packet is from ourself. */
if(memcmp(packet + 1, self_public_key, CLIENT_ID_SIZE) == 0) { if(memcmp(packet + 1, self_public_key, CLIENT_ID_SIZE) == 0)
return 1; return 1;
}
int len = decrypt_data(packet + 1, self_secret_key, packet + 1 + CLIENT_ID_SIZE, int len = decrypt_data(packet + 1, self_secret_key, packet + 1 + CLIENT_ID_SIZE,
packet + 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES, packet + 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES,
sizeof(ping_id) + ENCRYPTION_PADDING, (uint8_t *)&ping_id); sizeof(ping_id) + ENCRYPTION_PADDING, (uint8_t *)&ping_id);
if(len != sizeof(ping_id)) { if(len != sizeof(ping_id))
return 1; return 1;
}
pingres(source, packet + 1, ping_id); pingres(source, packet + 1, ping_id);
pingreq(source, packet + 1); /* TODO: make this smarter? */ pingreq(source, packet + 1); /* TODO: make this smarter? */
return 0; return 0;
} }
int handle_pingres(uint8_t * packet, uint32_t length, IP_Port source) int handle_pingres(uint8_t * packet, uint32_t length, IP_Port source)
{ {
uint64_t ping_id; uint64_t ping_id;
if(length != 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id) + ENCRYPTION_PADDING) { if(length != 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id) + ENCRYPTION_PADDING)
return 1; return 1;
} if(memcmp(packet + 1, self_public_key, CLIENT_ID_SIZE) == 0) /* check if packet is from ourself. */
if(memcmp(packet + 1, self_public_key, CLIENT_ID_SIZE) == 0) /* check if packet is from ourself. */ {
return 1; return 1;
}
int len = decrypt_data(packet + 1, self_secret_key, packet + 1 + CLIENT_ID_SIZE, int len = decrypt_data(packet + 1, self_secret_key, packet + 1 + CLIENT_ID_SIZE,
packet + 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES, packet + 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES,
sizeof(ping_id) + ENCRYPTION_PADDING, (uint8_t *)&ping_id); sizeof(ping_id) + ENCRYPTION_PADDING, (uint8_t *)&ping_id);
if(len != sizeof(ping_id)) { if(len != sizeof(ping_id))
return 1; return 1;
}
if(is_pinging(source, ping_id)) { if(is_pinging(source, ping_id)) {
addto_lists(source, packet + 1); addto_lists(source, packet + 1);
@ -633,13 +557,11 @@ int handle_pingres(uint8_t * packet, uint32_t length, IP_Port source)
int handle_getnodes(uint8_t * packet, uint32_t length, IP_Port source) int handle_getnodes(uint8_t * packet, uint32_t length, IP_Port source)
{ {
uint64_t ping_id; uint64_t ping_id;
if(length != 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id) + CLIENT_ID_SIZE + ENCRYPTION_PADDING) { if(length != 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id) + CLIENT_ID_SIZE + ENCRYPTION_PADDING)
return 1; return 1;
}
/* check if packet is from ourself. */ /* check if packet is from ourself. */
if(memcmp(packet + 1, self_public_key, CLIENT_ID_SIZE) == 0) { if(memcmp(packet + 1, self_public_key, CLIENT_ID_SIZE) == 0)
return 1; return 1;
}
uint8_t plain[sizeof(ping_id) + CLIENT_ID_SIZE]; uint8_t plain[sizeof(ping_id) + CLIENT_ID_SIZE];
@ -647,10 +569,8 @@ int handle_getnodes(uint8_t * packet, uint32_t length, IP_Port source)
packet + 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES, packet + 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES,
sizeof(ping_id) + CLIENT_ID_SIZE + ENCRYPTION_PADDING, plain); sizeof(ping_id) + CLIENT_ID_SIZE + ENCRYPTION_PADDING, plain);
if(len != sizeof(ping_id) + CLIENT_ID_SIZE) { if(len != sizeof(ping_id) + CLIENT_ID_SIZE)
return 1; return 1;
}
memcpy(&ping_id, plain, sizeof(ping_id)); memcpy(&ping_id, plain, sizeof(ping_id));
sendnodes(source, packet + 1, plain + sizeof(ping_id), ping_id); sendnodes(source, packet + 1, plain + sizeof(ping_id), ping_id);
@ -664,6 +584,7 @@ int handle_getnodes(uint8_t * packet, uint32_t length, IP_Port source)
int handle_sendnodes(uint8_t * packet, uint32_t length, IP_Port source) int handle_sendnodes(uint8_t * packet, uint32_t length, IP_Port source)
{ {
uint64_t ping_id; uint64_t ping_id;
/* TODO: make this more readable */
if(length > (1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id) if(length > (1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id)
+ sizeof(Node_format) * MAX_SENT_NODES + ENCRYPTION_PADDING) || + sizeof(Node_format) * MAX_SENT_NODES + ENCRYPTION_PADDING) ||
(length - (1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id) (length - (1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id)
@ -681,15 +602,12 @@ int handle_sendnodes(uint8_t * packet, uint32_t length, IP_Port source)
packet + 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES, packet + 1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES,
sizeof(ping_id) + num_nodes * sizeof(Node_format) + ENCRYPTION_PADDING, plain); sizeof(ping_id) + num_nodes * sizeof(Node_format) + ENCRYPTION_PADDING, plain);
if(len != sizeof(ping_id) + num_nodes * sizeof(Node_format))
if(len != sizeof(ping_id) + num_nodes * sizeof(Node_format)) {
return 1; return 1;
}
memcpy(&ping_id, plain, sizeof(ping_id)); memcpy(&ping_id, plain, sizeof(ping_id));
if(!is_gettingnodes(source, ping_id)) { if(!is_gettingnodes(source, ping_id))
return 1; return 1;
}
Node_format nodes_list[MAX_SENT_NODES]; Node_format nodes_list[MAX_SENT_NODES];
memcpy(nodes_list, plain + sizeof(ping_id), num_nodes * sizeof(Node_format)); memcpy(nodes_list, plain + sizeof(ping_id), num_nodes * sizeof(Node_format));
@ -710,14 +628,12 @@ int handle_sendnodes(uint8_t * packet, uint32_t length, IP_Port source)
int DHT_addfriend(uint8_t * client_id) int DHT_addfriend(uint8_t * client_id)
{ {
Friend * temp; Friend * temp;
if(num_friends == 0) { if(num_friends == 0)
temp = malloc(sizeof(Friend)); temp = malloc(sizeof(Friend));
} else { else
temp = realloc(friends_list, sizeof(Friend) * (num_friends + 1)); temp = realloc(friends_list, sizeof(Friend) * (num_friends + 1));
} if(temp == NULL)
if(temp == NULL) {
return 1; return 1;
}
friends_list = temp; friends_list = temp;
memset(&friends_list[num_friends], 0, sizeof(Friend)); memset(&friends_list[num_friends], 0, sizeof(Friend));
@ -731,20 +647,18 @@ int DHT_delfriend(uint8_t * client_id)
{ {
uint32_t i; uint32_t i;
Friend * temp; Friend * temp;
for(i = 0; i < num_friends; ++i) { for(i = 0; i < num_friends; ++i)
/* Equal */ /* Equal */
if(memcmp(friends_list[i].client_id, client_id, CLIENT_ID_SIZE) == 0) { if(memcmp(friends_list[i].client_id, client_id, CLIENT_ID_SIZE) == 0) {
--num_friends; --num_friends;
if(num_friends != i) { if(num_friends != i)
memcpy(friends_list[i].client_id, friends_list[num_friends].client_id, CLIENT_ID_SIZE); memcpy(friends_list[i].client_id, friends_list[num_friends].client_id, CLIENT_ID_SIZE);
}
temp = realloc(friends_list, sizeof(Friend) * (num_friends)); temp = realloc(friends_list, sizeof(Friend) * (num_friends));
if(temp != NULL) { if(temp != NULL)
friends_list = temp; friends_list = temp;
}
return 0; return 0;
} }
}
return 1; return 1;
} }
@ -754,18 +668,16 @@ IP_Port DHT_getfriendip(uint8_t * client_id)
uint32_t i, j; uint32_t i, j;
IP_Port empty = {{{0}}, 0}; IP_Port empty = {{{0}}, 0};
uint32_t temp_time = unix_time(); uint32_t temp_time = unix_time();
for(i = 0; i < num_friends; ++i) { for(i = 0; i < num_friends; ++i)
/* Equal */ /* Equal */
if(memcmp(friends_list[i].client_id, client_id, CLIENT_ID_SIZE) == 0) { if(memcmp(friends_list[i].client_id, client_id, CLIENT_ID_SIZE) == 0) {
for(j = 0; j < MAX_FRIEND_CLIENTS; ++j) { for(j = 0; j < MAX_FRIEND_CLIENTS; ++j)
if(memcmp(friends_list[i].client_list[j].client_id, client_id, CLIENT_ID_SIZE) == 0 && if(memcmp(friends_list[i].client_list[j].client_id, client_id, CLIENT_ID_SIZE) == 0 &&
friends_list[i].client_list[j].timestamp + BAD_NODE_TIMEOUT > temp_time) { friends_list[i].client_list[j].timestamp + BAD_NODE_TIMEOUT > temp_time)
return friends_list[i].client_list[j].ip_port; return friends_list[i].client_list[j].ip_port;
}
}
return empty; return empty;
} }
}
empty.ip.i = 1; empty.ip.i = 1;
return empty; return empty;
@ -791,7 +703,7 @@ void doDHTFriends()
for(i = 0; i < num_friends; ++i) { for(i = 0; i < num_friends; ++i) {
uint32_t num_nodes = 0; uint32_t num_nodes = 0;
for(j = 0; j < MAX_FRIEND_CLIENTS; ++j) { for(j = 0; j < MAX_FRIEND_CLIENTS; ++j)
if(friends_list[i].client_list[j].timestamp + Kill_NODE_TIMEOUT > temp_time) /* if node is not dead. */ { if(friends_list[i].client_list[j].timestamp + Kill_NODE_TIMEOUT > temp_time) /* if node is not dead. */ {
if((friends_list[i].client_list[j].last_pinged + PING_INTERVAL) <= temp_time) { if((friends_list[i].client_list[j].last_pinged + PING_INTERVAL) <= temp_time) {
pingreq(friends_list[i].client_list[j].ip_port, friends_list[i].client_list[j].client_id); pingreq(friends_list[i].client_list[j].ip_port, friends_list[i].client_list[j].client_id);
@ -802,7 +714,6 @@ void doDHTFriends()
++num_nodes; ++num_nodes;
} }
} }
}
if(friends_list[i].lastgetnode + GET_NODE_INTERVAL <= temp_time && num_nodes != 0) { if(friends_list[i].lastgetnode + GET_NODE_INTERVAL <= temp_time && num_nodes != 0) {
rand_node = rand() % num_nodes; rand_node = rand() % num_nodes;
getnodes(friends_list[i].client_list[index[rand_node]].ip_port, getnodes(friends_list[i].client_list[index[rand_node]].ip_port,
@ -825,11 +736,10 @@ void doClose() /* tested */
uint32_t rand_node; uint32_t rand_node;
uint32_t index[LCLIENT_LIST]; uint32_t index[LCLIENT_LIST];
for(i = 0; i < LCLIENT_LIST; ++i) { for(i = 0; i < LCLIENT_LIST; ++i)
/* if node is not dead. */ /* if node is not dead. */
if(close_clientlist[i].timestamp + Kill_NODE_TIMEOUT > temp_time) { if(close_clientlist[i].timestamp + Kill_NODE_TIMEOUT > temp_time) {
if((close_clientlist[i].last_pinged + PING_INTERVAL) <= temp_time) if((close_clientlist[i].last_pinged + PING_INTERVAL) <= temp_time) {
{
pingreq(close_clientlist[i].ip_port, close_clientlist[i].client_id); pingreq(close_clientlist[i].ip_port, close_clientlist[i].client_id);
close_clientlist[i].last_pinged = temp_time; close_clientlist[i].last_pinged = temp_time;
} }
@ -839,7 +749,6 @@ void doClose() /* tested */
++num_nodes; ++num_nodes;
} }
} }
}
if(close_lastgetnodes + GET_NODE_INTERVAL <= temp_time && num_nodes != 0) { if(close_lastgetnodes + GET_NODE_INTERVAL <= temp_time && num_nodes != 0) {
rand_node = rand() % num_nodes; rand_node = rand() % num_nodes;
@ -860,11 +769,9 @@ void DHT_bootstrap(IP_Port ip_port, uint8_t * public_key)
int route_packet(uint8_t * client_id, uint8_t * packet, uint32_t length) int route_packet(uint8_t * client_id, uint8_t * packet, uint32_t length)
{ {
uint32_t i; uint32_t i;
for(i = 0; i < LCLIENT_LIST; ++i) { for(i = 0; i < LCLIENT_LIST; ++i)
if(memcmp(client_id, close_clientlist[i].client_id, CLIENT_ID_SIZE) == 0) { if(memcmp(client_id, close_clientlist[i].client_id, CLIENT_ID_SIZE) == 0)
return sendpacket(close_clientlist[i].ip_port, packet, length); return sendpacket(close_clientlist[i].ip_port, packet, length);
}
}
return -1; return -1;
} }
@ -878,21 +785,17 @@ static int friend_iplist(IP_Port * ip_portlist, uint16_t friend_num)
int num_ips = 0; int num_ips = 0;
uint32_t i; uint32_t i;
uint32_t temp_time = unix_time(); uint32_t temp_time = unix_time();
if(friend_num >= num_friends) { if(friend_num >= num_friends)
return -1; return -1;
}
for(i = 0; i < MAX_FRIEND_CLIENTS; ++i) for(i = 0; i < MAX_FRIEND_CLIENTS; ++i)
{
/*If ip is not zero and node is good */ /*If ip is not zero and node is good */
if(friends_list[friend_num].client_list[i].ret_ip_port.ip.i != 0 && if(friends_list[friend_num].client_list[i].ret_ip_port.ip.i != 0 &&
friends_list[friend_num].client_list[i].ret_timestamp + BAD_NODE_TIMEOUT > temp_time) { friends_list[friend_num].client_list[i].ret_timestamp + BAD_NODE_TIMEOUT > temp_time) {
if(memcmp(friends_list[friend_num].client_list[i].client_id, friends_list[friend_num].client_id, CLIENT_ID_SIZE) == 0 ) { if(memcmp(friends_list[friend_num].client_list[i].client_id, friends_list[friend_num].client_id, CLIENT_ID_SIZE) == 0 )
return 0; return 0;
}
ip_portlist[num_ips] = friends_list[friend_num].client_list[i].ret_ip_port; ip_portlist[num_ips] = friends_list[friend_num].client_list[i].ret_ip_port;
++num_ips; ++num_ips;
} }
}
return num_ips; return num_ips;
} }
@ -903,21 +806,17 @@ int route_tofriend(uint8_t * friend_id, uint8_t * packet, uint32_t length)
uint32_t i, j; uint32_t i, j;
uint32_t sent = 0; uint32_t sent = 0;
uint32_t temp_time = unix_time(); uint32_t temp_time = unix_time();
for(i = 0; i < num_friends; ++i) { for(i = 0; i < num_friends; ++i)
/* Equal */ /* Equal */
if(memcmp(friends_list[i].client_id, friend_id, CLIENT_ID_SIZE) == 0) { if(memcmp(friends_list[i].client_id, friend_id, CLIENT_ID_SIZE) == 0) {
for(j = 0; j < MAX_FRIEND_CLIENTS; ++j) { for(j = 0; j < MAX_FRIEND_CLIENTS; ++j)
/*If ip is not zero and node is good */ /*If ip is not zero and node is good */
if(friends_list[i].client_list[j].ret_ip_port.ip.i != 0 && if(friends_list[i].client_list[j].ret_ip_port.ip.i != 0 &&
friends_list[i].client_list[j].ret_timestamp + BAD_NODE_TIMEOUT > temp_time) { friends_list[i].client_list[j].ret_timestamp + BAD_NODE_TIMEOUT > temp_time)
if(sendpacket(friends_list[i].client_list[j].ip_port, packet, length) == length) { if(sendpacket(friends_list[i].client_list[j].ip_port, packet, length) == length)
++sent; ++sent;
}
}
}
return sent; return sent;
} }
}
return 0; return 0;
} }
@ -926,28 +825,24 @@ int route_tofriend(uint8_t * friend_id, uint8_t * packet, uint32_t length)
int routeone_tofriend(uint8_t * friend_id, uint8_t * packet, uint32_t length) int routeone_tofriend(uint8_t * friend_id, uint8_t * packet, uint32_t length)
{ {
int num = friend_number(friend_id); int num = friend_number(friend_id);
if(num == -1) { if(num == -1)
return 0; return 0;
}
IP_Port ip_list[MAX_FRIEND_CLIENTS]; IP_Port ip_list[MAX_FRIEND_CLIENTS];
int n = 0; int n = 0;
uint32_t i; uint32_t i;
uint32_t temp_time = unix_time(); uint32_t temp_time = unix_time();
for(i = 0; i < MAX_FRIEND_CLIENTS; ++i) { for(i = 0; i < MAX_FRIEND_CLIENTS; ++i)
/*If ip is not zero and node is good */ /*If ip is not zero and node is good */
if(friends_list[num].client_list[i].ret_ip_port.ip.i != 0 && if(friends_list[num].client_list[i].ret_ip_port.ip.i != 0 &&
friends_list[num].client_list[i].ret_timestamp + BAD_NODE_TIMEOUT > temp_time) { friends_list[num].client_list[i].ret_timestamp + BAD_NODE_TIMEOUT > temp_time) {
ip_list[n] = friends_list[num].client_list[i].ip_port; ip_list[n] = friends_list[num].client_list[i].ip_port;
++n; ++n;
} }
} if(n < 1)
if(n < 1) {
return 0; return 0;
} if(sendpacket(ip_list[rand() % n], packet, length) == length)
if(sendpacket(ip_list[rand() % n], packet, length) == length) {
return 1; return 1;
}
return 0; return 0;
} }
@ -960,12 +855,10 @@ int friend_ips(IP_Port * ip_portlist, uint8_t * friend_id)
{ {
uint32_t i; uint32_t i;
for(i = 0; i < num_friends; ++i) { for(i = 0; i < num_friends; ++i)
/* Equal */ /* Equal */
if(memcmp(friends_list[i].client_id, friend_id, CLIENT_ID_SIZE) == 0) { if(memcmp(friends_list[i].client_id, friend_id, CLIENT_ID_SIZE) == 0)
return friend_iplist(ip_portlist, i); return friend_iplist(ip_portlist, i);
}
}
return -1; return -1;
} }
@ -979,19 +872,17 @@ int send_NATping(uint8_t * public_key, uint64_t ping_id, uint8_t type)
uint8_t packet[MAX_DATA_SIZE]; uint8_t packet[MAX_DATA_SIZE];
int len = create_request(packet, public_key, data, sizeof(uint64_t) + 1, 254); /* 254 is NAT ping request packet id */ int len = create_request(packet, public_key, data, sizeof(uint64_t) + 1, 254); /* 254 is NAT ping request packet id */
if(len == -1) { if(len == -1)
return -1; return -1;
}
int num = 0; int num = 0;
if(type == 0) {
if(type == 0)
num = route_tofriend(public_key, packet, len);/*If packet is request use many people to route it*/ num = route_tofriend(public_key, packet, len);/*If packet is request use many people to route it*/
} else if(type == 1)
else if(type == 1) {
num = routeone_tofriend(public_key, packet, len);/*If packet is response use only one person to route it*/ num = routeone_tofriend(public_key, packet, len);/*If packet is response use only one person to route it*/
} if(num == 0)
if(num == 0) {
return -1; return -1;
}
return num; return num;
} }
@ -999,44 +890,37 @@ int send_NATping(uint8_t * public_key, uint64_t ping_id, uint8_t type)
int handle_NATping(uint8_t * packet, uint32_t length, IP_Port source) int handle_NATping(uint8_t * packet, uint32_t length, IP_Port source)
{ {
if(length <= crypto_box_PUBLICKEYBYTES * 2 + crypto_box_NONCEBYTES + 1 + ENCRYPTION_PADDING && if(length <= crypto_box_PUBLICKEYBYTES * 2 + crypto_box_NONCEBYTES + 1 + ENCRYPTION_PADDING &&
length > MAX_DATA_SIZE + ENCRYPTION_PADDING) { length > MAX_DATA_SIZE + ENCRYPTION_PADDING)
return 1; return 1;
}
/* check if request is for us. */ /* check if request is for us. */
if(memcmp(packet + 1, self_public_key, crypto_box_PUBLICKEYBYTES) == 0) { if(memcmp(packet + 1, self_public_key, crypto_box_PUBLICKEYBYTES) == 0) {
uint8_t public_key[crypto_box_PUBLICKEYBYTES]; uint8_t public_key[crypto_box_PUBLICKEYBYTES];
uint8_t data[MAX_DATA_SIZE]; uint8_t data[MAX_DATA_SIZE];
int len = handle_request(public_key, data, packet, length); int len = handle_request(public_key, data, packet, length);
if(len != sizeof(uint64_t) + 1) { if(len != sizeof(uint64_t) + 1)
return 1; return 1;
}
uint64_t ping_id; uint64_t ping_id;
memcpy(&ping_id, data + 1, sizeof(uint64_t)); memcpy(&ping_id, data + 1, sizeof(uint64_t));
int friendnumber = friend_number(public_key); int friendnumber = friend_number(public_key);
if(friendnumber == -1) { if(friendnumber == -1)
return 1; return 1;
}
if(data[0] == 0) { if(data[0] == 0) {
send_NATping(public_key, ping_id, 1); /*1 is reply*/ send_NATping(public_key, ping_id, 1); /*1 is reply*/
return 0; return 0;
} else if (data[0] == 1) { } else if (data[0] == 1)
if(friends_list[friendnumber].NATping_id == ping_id) if(friends_list[friendnumber].NATping_id == ping_id) {
{
friends_list[friendnumber].NATping_id = ((uint64_t)random_int() << 32) + random_int(); friends_list[friendnumber].NATping_id = ((uint64_t)random_int() << 32) + random_int();
friends_list[friendnumber].hole_punching = 1; friends_list[friendnumber].hole_punching = 1;
return 0; return 0;
} }
}
return 1; return 1;
} }
/* if request is not for us, try routing it. */ /* if request is not for us, try routing it. */
else { else
if(route_packet(packet + 1, packet, length) == length) { if(route_packet(packet + 1, packet, length) == length)
return 0; return 0;
}
}
return 0; return 0;
} }
@ -1047,22 +931,18 @@ int handle_NATping(uint8_t * packet, uint32_t length, IP_Port source)
static IP NAT_commonip(IP_Port * ip_portlist, uint16_t len, uint16_t min_num) static IP NAT_commonip(IP_Port * ip_portlist, uint16_t len, uint16_t min_num)
{ {
IP zero = {{0}}; IP zero = {{0}};
if(len > MAX_FRIEND_CLIENTS) { if(len > MAX_FRIEND_CLIENTS)
return zero; return zero;
}
uint32_t i, j; uint32_t i, j;
uint16_t numbers[MAX_FRIEND_CLIENTS] = {0}; uint16_t numbers[MAX_FRIEND_CLIENTS] = {0};
for(i = 0; i < len; ++i) { for(i = 0; i < len; ++i) {
for(j = 0; j < len; ++j) { for(j = 0; j < len; ++j)
if(ip_portlist[i].ip.i == ip_portlist[j].ip.i) { if(ip_portlist[i].ip.i == ip_portlist[j].ip.i)
++numbers[i]; ++numbers[i];
} if(numbers[i] >= min_num)
}
if(numbers[i] >= min_num) {
return ip_portlist[i].ip; return ip_portlist[i].ip;
} }
}
return zero; return zero;
} }
@ -1074,12 +954,11 @@ static uint16_t NAT_getports(uint16_t * portlist, IP_Port * ip_portlist, uint16_
{ {
uint32_t i; uint32_t i;
uint16_t num = 0; uint16_t num = 0;
for(i = 0; i < len; ++i) { for(i = 0; i < len; ++i)
if(ip_portlist[i].ip.i == ip.i) { if(ip_portlist[i].ip.i == ip.i) {
portlist[num] = ntohs(ip_portlist[i].port); portlist[num] = ntohs(ip_portlist[i].port);
++num; ++num;
} }
}
return num; return num;
} }
@ -1087,9 +966,8 @@ static uint16_t NAT_getports(uint16_t * portlist, IP_Port * ip_portlist, uint16_
static void punch_holes(IP ip, uint16_t * port_list, uint16_t numports, uint16_t friend_num) static void punch_holes(IP ip, uint16_t * port_list, uint16_t numports, uint16_t friend_num)
{ {
if(numports > MAX_FRIEND_CLIENTS || numports == 0) { if(numports > MAX_FRIEND_CLIENTS || numports == 0)
return; return;
}
uint32_t i; uint32_t i;
uint32_t top = friends_list[friend_num].punching_index + MAX_PUNCHING_PORTS; uint32_t top = friends_list[friend_num].punching_index + MAX_PUNCHING_PORTS;
for(i = friends_list[friend_num].punching_index; i != top; i++) { for(i = friends_list[friend_num].punching_index; i != top; i++) {
@ -1112,9 +990,9 @@ static void doNAT()
IP_Port ip_list[MAX_FRIEND_CLIENTS]; IP_Port ip_list[MAX_FRIEND_CLIENTS];
int num = friend_iplist(ip_list, i); int num = friend_iplist(ip_list, i);
/*If we are connected to friend or if friend is not online don't try to hole punch with him*/ /*If we are connected to friend or if friend is not online don't try to hole punch with him*/
if(num < MAX_FRIEND_CLIENTS/2) { if(num < MAX_FRIEND_CLIENTS/2)
continue; continue;
}
if(friends_list[i].hole_punching != 1) { if(friends_list[i].hole_punching != 1) {
if(friends_list[i].NATping_timestamp + PUNCH_INTERVAL < temp_time) { if(friends_list[i].NATping_timestamp + PUNCH_INTERVAL < temp_time) {
send_NATping(friends_list[i].client_id, friends_list[i].NATping_id, 0); /*0 is request*/ send_NATping(friends_list[i].client_id, friends_list[i].NATping_id, 0); /*0 is request*/
@ -1123,9 +1001,9 @@ static void doNAT()
} }
else if(friends_list[i].punching_timestamp + PUNCH_INTERVAL < temp_time) { else if(friends_list[i].punching_timestamp + PUNCH_INTERVAL < temp_time) {
IP ip = NAT_commonip(ip_list, num, MAX_FRIEND_CLIENTS/2); IP ip = NAT_commonip(ip_list, num, MAX_FRIEND_CLIENTS/2);
if(ip.i == 0) { if(ip.i == 0)
continue; continue;
}
uint16_t port_list[MAX_FRIEND_CLIENTS]; uint16_t port_list[MAX_FRIEND_CLIENTS];
uint16_t numports = NAT_getports(port_list, ip_list, num, ip); uint16_t numports = NAT_getports(port_list, ip_list, num, ip);
punch_holes(ip, port_list, numports, i); punch_holes(ip, port_list, numports, i);
@ -1162,7 +1040,6 @@ int DHT_handlepacket(uint8_t * packet, uint32_t length, IP_Port source)
} }
return 0; return 0;
} }
void doDHT() void doDHT()
@ -1190,12 +1067,10 @@ void DHT_save(uint8_t * data)
return 0 if success */ return 0 if success */
int DHT_load(uint8_t * data, uint32_t size) int DHT_load(uint8_t * data, uint32_t size)
{ {
if(size < sizeof(close_clientlist)) { if(size < sizeof(close_clientlist))
return -1; return -1;
} if((size - sizeof(close_clientlist)) % sizeof(Friend) != 0)
if((size - sizeof(close_clientlist)) % sizeof(Friend) != 0) {
return -1; return -1;
}
uint32_t i, j; uint32_t i, j;
/* uint32_t temp_time = unix_time(); */ /* uint32_t temp_time = unix_time(); */
uint16_t temp; uint16_t temp;
@ -1207,21 +1082,18 @@ int DHT_load(uint8_t * data, uint32_t size)
for(i = 0; i < temp; ++i) { for(i = 0; i < temp; ++i) {
DHT_addfriend(tempfriends_list[i].client_id); DHT_addfriend(tempfriends_list[i].client_id);
for(j = 0; j < MAX_FRIEND_CLIENTS; ++j) { for(j = 0; j < MAX_FRIEND_CLIENTS; ++j)
if(tempfriends_list[i].client_list[j].timestamp != 0) { if(tempfriends_list[i].client_list[j].timestamp != 0) {
getnodes(tempfriends_list[i].client_list[j].ip_port, getnodes(tempfriends_list[i].client_list[j].ip_port,
tempfriends_list[i].client_list[j].client_id, tempfriends_list[i].client_id); tempfriends_list[i].client_list[j].client_id, tempfriends_list[i].client_id);
} }
} }
} }
}
Client_data * tempclose_clientlist = (Client_data *)data; Client_data * tempclose_clientlist = (Client_data *)data;
for(i = 0; i < LCLIENT_LIST; ++i) { for(i = 0; i < LCLIENT_LIST; ++i)
if(tempclose_clientlist[i].timestamp != 0) { if(tempclose_clientlist[i].timestamp != 0)
DHT_bootstrap(tempclose_clientlist[i].ip_port, tempclose_clientlist[i].client_id); DHT_bootstrap(tempclose_clientlist[i].ip_port, tempclose_clientlist[i].client_id);
}
}
return 0; return 0;
} }
@ -1231,10 +1103,8 @@ int DHT_isconnected()
{ {
uint32_t i; uint32_t i;
uint32_t temp_time = unix_time(); uint32_t temp_time = unix_time();
for(i = 0; i < LCLIENT_LIST; ++i) { for(i = 0; i < LCLIENT_LIST; ++i)
if(close_clientlist[i].timestamp + BAD_NODE_TIMEOUT > temp_time) { if(close_clientlist[i].timestamp + BAD_NODE_TIMEOUT > temp_time)
return 1; return 1;
}
}
return 0; return 0;
} }