mirror of
https://github.com/irungentoo/toxcore.git
synced 2024-03-22 13:30:51 +08:00
DHT almost done, started testing. Fixed ADDR compiling problem. No more warnings with GCC and clang.
This commit is contained in:
irungentoo
parent
b9563fd9e2
commit
c93858110b
155
core/DHT.c
155
core/DHT.c
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@ -7,8 +7,7 @@
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//Function to send packet(data) of length length to ip_port
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int sendpacket(IP_Port ip_port, char * data, uint32_t length)
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{
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ADDR addr = {.family = AF_INET, .ip = ip_port.ip, .port = ip_port.port};
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ADDR addr = {AF_INET, ip_port.port, ip_port.ip};
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return sendto(sock, data, length, 0, (struct sockaddr *)&addr, sizeof(addr));
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}
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@ -71,7 +70,7 @@ int client_in_list(Client_data * list, uint32_t length, char * client_id)
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break;
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}
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}
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if((j - 1) == CLIENT_ID_SIZE)
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if(j == CLIENT_ID_SIZE)
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{
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//Refresh the client timestamp.
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list[i].timestamp = unix_time();
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@ -81,7 +80,7 @@ int client_in_list(Client_data * list, uint32_t length, char * client_id)
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return 0;
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}
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//check if client with client_id is already in knode format list of length length.
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//check if client with client_id is already in node format list of length length.
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//return True(1) or False(0)
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int client_in_nodelist(Node_format * list, uint32_t length, char * client_id)
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{
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@ -96,7 +95,7 @@ int client_in_nodelist(Node_format * list, uint32_t length, char * client_id)
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break;
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}
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}
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if((j - 1) == CLIENT_ID_SIZE)
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if(j == CLIENT_ID_SIZE)
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{
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return 1;
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@ -161,19 +160,18 @@ int get_close_nodes(char * client_id, Node_format * nodes_list)
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}
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else for(k = 0; k < MAX_SENT_NODES; k++)
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{
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if(id_closest(client_id, nodes_list[j].client_id, friends_list[i].client_list[j].client_id) == 2)
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if(id_closest(client_id, nodes_list[k].client_id, friends_list[i].client_list[j].client_id) == 2)
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{
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memcpy(nodes_list[j].client_id, friends_list[i].client_list[j].client_id, CLIENT_ID_SIZE);
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nodes_list[j].ip_port = friends_list[i].client_list[j].ip_port;
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memcpy(nodes_list[k].client_id, friends_list[i].client_list[j].client_id, CLIENT_ID_SIZE);
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nodes_list[k].ip_port = friends_list[i].client_list[j].ip_port;
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break;
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}
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}
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}
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}
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}
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}
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return num_nodes;
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}
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@ -216,7 +214,7 @@ int replace_good(Client_data * list, uint32_t length, char * client_id, IP_Port
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}
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//Attempt to add client with ip_port and client_id to the friends client list and close_clientlist
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int addto_lists(IP_Port ip_port, char * client_id)
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void addto_lists(IP_Port ip_port, char * client_id)
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{
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uint32_t i;
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@ -295,6 +293,7 @@ int is_gettingnodes(IP_Port ip_port)
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//Add a new ping request to the list of ping requests
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//returns the ping_id to put in the ping request
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//returns 0 if problem.
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//TODO: Maybe optimize this
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int add_pinging(IP_Port ip_port)
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{
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@ -313,6 +312,7 @@ int add_pinging(IP_Port ip_port)
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}
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}
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}
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return 0;
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}
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//Same but for get node requests
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@ -333,10 +333,12 @@ int add_gettingnodes(IP_Port ip_port)
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}
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}
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}
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return 0;
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}
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//send a ping request
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//Ping request only works if there is none hos been sent to that ip/port in the last 5 seconds.
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int pingreq(IP_Port ip_port)
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{
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if(is_pinging(ip_port))
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@ -345,6 +347,10 @@ int pingreq(IP_Port ip_port)
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}
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int ping_id = add_pinging(ip_port);
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if(ping_id == 0)
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{
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return 1;
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}
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char data[5 + CLIENT_ID_SIZE];
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data[0] = 0;
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@ -377,7 +383,12 @@ int getnodes(IP_Port ip_port, char * client_id)
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return 1;
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}
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int ping_id = add_pinging(ip_port);
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int ping_id = add_gettingnodes(ip_port);
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if(ping_id == 0)
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{
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return 1;
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}
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char data[5 + CLIENT_ID_SIZE*2];
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data[0] = 2;
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@ -392,15 +403,20 @@ int getnodes(IP_Port ip_port, char * client_id)
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//send a send nodes response
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//Currently incomplete: missing bunch of stuff
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int sendnodes(IP_Port ip_port, char * client_id)
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int sendnodes(IP_Port ip_port, char * client_id, uint32_t ping_id)
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{
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char data[5 + (CLIENT_ID_SIZE + sizeof(IP_Port))*MAX_SENT_NODES];
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Node_format nodes_list[MAX_SENT_NODES];
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int num_nodes = get_close_nodes(client_id, nodes_list);
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data[0] = 3;
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memcpy(data + 1, &ping_id, 4);
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memcpy(data + 5, self_client_id, CLIENT_ID_SIZE);
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memcpy(data + 5 + CLIENT_ID_SIZE, client_id, CLIENT_ID_SIZE);
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memcpy(data + 5 + CLIENT_ID_SIZE, nodes_list, num_nodes * (CLIENT_ID_SIZE + sizeof(IP_Port)));
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sendpacket(ip_port, data, sizeof(data));
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return sendpacket(ip_port, data, sizeof(data));
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}
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@ -421,6 +437,8 @@ int handle_pingreq(char * packet, uint32_t length, IP_Port source)
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memcpy(&ping_id, packet + 1, 4);
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pingres(source, ping_id);
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pingreq(source);
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return 0;
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}
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@ -432,6 +450,7 @@ int handle_pingres(char * packet, uint32_t length, IP_Port source)
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}
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addto_lists(source, packet + 5);
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return 0;
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}
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int handle_getnodes(char * packet, uint32_t length, IP_Port source)
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@ -440,9 +459,9 @@ int handle_getnodes(char * packet, uint32_t length, IP_Port source)
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{
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return 1;
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}
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//sendnodes(IP_Port ip_port, char * client_id)
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uint32_t ping_id;
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memcpy(&ping_id, packet + 1, 4);
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sendnodes(source, packet + 5 + CLIENT_ID_SIZE, ping_id);
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return 0;
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}
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@ -454,8 +473,19 @@ int handle_sendnodes(char * packet, uint32_t length, IP_Port source)
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{
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return 1;
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}
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addto_lists(source, packet + 5);
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int num_nodes = (length - 5) / (CLIENT_ID_SIZE + sizeof(IP_Port));
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uint32_t i;
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Node_format nodes_list[MAX_SENT_NODES];
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memcpy(nodes_list, packet + 5, num_nodes);
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for(i = 0; i < num_nodes; i++)
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{
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pingreq(nodes_list[i].ip_port);
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}
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addto_lists(source, packet + 5);
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return 0;
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}
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//END of packet handling functions
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@ -492,32 +522,51 @@ char delfriend(char * client_id)
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//TODO: Optimize this.
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IP_Port getfriendip(char * client_id)
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{
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uint32_t i, j;
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IP_Port empty = {{{0}}, 0};
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for(i = 0; i < num_friends; i++)
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{
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if(memcmp(friends_list[i].client_id, client_id, CLIENT_ID_SIZE) == 0)//Equal
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{
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for(j = 0; j < MAX_FRIEND_CLIENTS; j++)
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{
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if(memcmp(friends_list[i].client_list[j].client_id, client_id, CLIENT_ID_SIZE) == 0)
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{
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return friends_list[i].client_list[j].ip_port;
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}
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}
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return empty;
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}
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}
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empty.ip.i = 1;
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return empty;
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}
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int DHT_recvpacket(char * packet, uint32_t length, IP_Port source)
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{
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switch (packet[0]) {
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case 0:
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handle_pingreq(packet, length, source);
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break;
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return handle_pingreq(packet, length, source);
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case 1:
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handle_pingres(packet, length, source);
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break;
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return handle_pingres(packet, length, source);
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case 2:
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handle_getnodes(packet, length, source);
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break;
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return handle_getnodes(packet, length, source);
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case 3:
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handle_sendnodes(packet, length, source);
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break;
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return handle_sendnodes(packet, length, source);
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default:
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return 1;
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@ -526,30 +575,60 @@ int DHT_recvpacket(char * packet, uint32_t length, IP_Port source)
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return 0;
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}
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//The timeout after which a node is discarded completely.
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#define Kill_NODE_TIMEOUT 300
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//ping interval in seconds for each node in our lists.
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#define PING_INTERVAL 60
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//Ping each client in the "friends" list every 60 seconds.
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//Send a get nodes request every 20 seconds to a random good node for each "friend" in our "friends" list.
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void doFriends()
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{
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uint32_t i, j;
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uint32_t temp_time = unix_time();
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for(i = 0; i < num_friends; i++)
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{
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for(j = 0; j < MAX_FRIEND_CLIENTS; j++)
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{
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if(friends_list[i].client_list[j].timestamp + Kill_NODE_TIMEOUT > temp_time)//if node is not dead.
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{
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//TODO: Make this better, it only works if the function is called more than once per second.
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if((temp_time - friends_list[i].client_list[j].timestamp) % PING_INTERVAL == 0)
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{
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pingreq(friends_list[i].client_list[j].ip_port);
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}
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//TODO: Send getnodes requests
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}
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}
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}
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}
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void doClose()
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{
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uint32_t i;
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uint32_t temp_time = unix_time();
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for(i = 0; i < MAX_FRIEND_CLIENTS; i++)
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{
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if(close_clientlist[i].timestamp + Kill_NODE_TIMEOUT > temp_time)//if node is not dead.
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{
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//TODO: Make this better, it only works if the function is called more than once per second.
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if((temp_time - close_clientlist[i].timestamp) % PING_INTERVAL == 0)
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{
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pingreq(close_clientlist[i].ip_port);
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}
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//TODO: Send getnodes requests
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}
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}
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}
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void doDHT()
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{
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doClose();
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doFriends();
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}
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@ -106,6 +106,7 @@ char delfriend(char * client_id);
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//port must be 2 bytes long.
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//returns ip if success
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//returns ip of 0 if failure (This means the friend is either offline or we have not found him yet.)
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//returns ip of 1 if friend is not in list.
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IP_Port getfriendip(char * client_id);
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@ -16,16 +16,34 @@
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#else
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#include <unistd.h>
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#include <arpa/inet.h>
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#define c_sleep(x) usleep(1000*x)
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#endif
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#define PORT 33445
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void print_clientlist()
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{
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uint32_t i, j;
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IP_Port p_ip;
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printf("___________________________________________________\n");
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for(i = 0; i < 4; i++)
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{
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printf("ClientID: ");
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for(j = 0; j < 32; j++)
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{
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printf("%c", close_clientlist[i].client_id[j]);
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}
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p_ip = close_clientlist[i].ip_port;
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printf("\nIP: %u.%u.%u.%u Port: %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));
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printf("\nTimestamp: %u\n", close_clientlist[i].timestamp);
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}
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}
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int main(int argc, char *argv[])
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{
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memcpy(self_client_id,"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA",32);
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#ifdef WIN32
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WSADATA wsaData;
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if(WSAStartup(MAKEWORD(2,2), &wsaData) != NO_ERROR)
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@ -52,9 +70,9 @@ int main(int argc, char *argv[])
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#endif
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//Bind our socket to port PORT and address 0.0.0.0
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ADDR addr = {.family = AF_INET, .ip.i = 0, .port = htons(PORT)};
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ADDR addr = {AF_INET, htons(PORT), {{0}}};
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bind(sock, (struct sockaddr*)&addr, sizeof(addr));
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perror("Initialization");
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IP_Port bootstrap_ip_port;
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bootstrap_ip_port.port = htons(atoi(argv[2]));
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//bootstrap_ip_port.ip.c[0] = 127;
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@ -75,7 +93,7 @@ int main(int argc, char *argv[])
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doDHT();
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if(recievepacket(&ip_port, data, &length) != -1)
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while(recievepacket(&ip_port, data, &length) != -1)
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{
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if(DHT_recvpacket(data, length, ip_port))
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{
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@ -90,7 +108,8 @@ int main(int argc, char *argv[])
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printf("Received handled packet with length: %u\n", length);
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}
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}
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c_sleep(100);
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print_clientlist();
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c_sleep(300);
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}
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#ifdef WIN32
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19
testing/rect.py
Normal file
19
testing/rect.py
Normal file
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@ -0,0 +1,19 @@
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#basic python UDP script
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#for testing only
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import socket
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UDP_IP = "127.0.0.1"
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UDP_PORT = 5004
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sock = socket.socket(socket.AF_INET, # Internet
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socket.SOCK_DGRAM) # UDP
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sock.bind((UDP_IP, UDP_PORT))
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#send ping request to our DHT on localhost.
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sock.sendto("0012345678".decode("hex") + "HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH", ('127.0.0.1', 33445))
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#print all packets recieved and respond to ping requests properly
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while True:
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data, addr = sock.recvfrom(1024) # buffer size is 1024 bytes
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print "received message:", data, " From:", addr
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sock.sendto("01".decode('hex') + data[1:5] + "HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH", addr)
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