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No longer rely on source ip to get the path the packet was sent with.

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irungentoo 2014-08-12 13:01:28 -04:00
parent e6f21d0524
commit 2c7654bd9a
No known key found for this signature in database
GPG Key ID: 10349DC9BED89E98
2 changed files with 34 additions and 25 deletions
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2
toxcore/onion.h
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@ -65,6 +65,8 @@ typedef struct {
IP_Port ip_port1;
IP_Port ip_port2;
IP_Port ip_port3;
uint32_t path_num;
} Onion_Path;
/* Create a new onion path.

57
toxcore/onion_client.c
View File

@ -130,6 +130,12 @@ static int random_path(const Onion_Client *onion_c, Onion_Client_Paths *onion_pa
onion_paths->last_path_success[pathnum] = unix_time() + ONION_PATH_FIRST_TIMEOUT - ONION_PATH_TIMEOUT;
onion_paths->path_creation_time[pathnum] = unix_time();
uint32_t path_num = rand();
path_num /= NUMBER_ONION_PATHS;
path_num *= NUMBER_ONION_PATHS;
path_num += pathnum;
onion_paths->paths[pathnum].path_num = path_num;
} else {
pathnum = n;
}
@ -142,7 +148,7 @@ static int random_path(const Onion_Client *onion_c, Onion_Client_Paths *onion_pa
/* Set path timeouts, return the path number.
*
*/
static uint32_t set_path_timeouts(Onion_Client *onion_c, uint32_t num, IP_Port source)
static uint32_t set_path_timeouts(Onion_Client *onion_c, uint32_t num, uint32_t path_num)
{
if (num > onion_c->num_friends)
return -1;
@ -155,13 +161,9 @@ static uint32_t set_path_timeouts(Onion_Client *onion_c, uint32_t num, IP_Port s
onion_paths = &onion_c->friends_list[num - 1].onion_paths;
}
uint32_t i;
for (i = 0; i < NUMBER_ONION_PATHS; ++i) {
if (ipport_equal(&onion_paths->paths[i].ip_port1, &source)) {
onion_paths->last_path_success[i] = unix_time();
return i;
}
if (onion_paths->paths[path_num % NUMBER_ONION_PATHS].path_num == path_num) {
onion_paths->last_path_success[path_num % NUMBER_ONION_PATHS] = unix_time();
return path_num % NUMBER_ONION_PATHS;
}
return ~0;
@ -208,12 +210,13 @@ static int send_onion_packet_tcp_udp(const Onion_Client *onion_c, const Onion_Pa
*
*/
static int new_sendback(Onion_Client *onion_c, uint32_t num, const uint8_t *public_key, IP_Port ip_port,
uint64_t *sendback)
uint32_t path_num, uint64_t *sendback)
{
uint8_t data[sizeof(uint32_t) + crypto_box_PUBLICKEYBYTES + sizeof(IP_Port)];
uint8_t data[sizeof(uint32_t) + crypto_box_PUBLICKEYBYTES + sizeof(IP_Port) + sizeof(uint32_t)];
memcpy(data, &num, sizeof(uint32_t));
memcpy(data + sizeof(uint32_t), public_key, crypto_box_PUBLICKEYBYTES);
memcpy(data + sizeof(uint32_t) + crypto_box_PUBLICKEYBYTES, &ip_port, sizeof(IP_Port));
memcpy(data + sizeof(uint32_t) + crypto_box_PUBLICKEYBYTES + sizeof(IP_Port), &path_num, sizeof(uint32_t));
*sendback = ping_array_add(&onion_c->announce_ping_array, data, sizeof(data));
if (*sendback == 0)
@ -233,17 +236,19 @@ static int new_sendback(Onion_Client *onion_c, uint32_t num, const uint8_t *publ
* return num (see new_sendback(...)) on success
*/
static uint32_t check_sendback(Onion_Client *onion_c, const uint8_t *sendback, uint8_t *ret_pubkey,
IP_Port *ret_ip_port)
IP_Port *ret_ip_port, uint32_t *path_num)
{
uint64_t sback;
memcpy(&sback, sendback, sizeof(uint64_t));
uint8_t data[sizeof(uint32_t) + crypto_box_PUBLICKEYBYTES + sizeof(IP_Port)];
uint8_t data[sizeof(uint32_t) + crypto_box_PUBLICKEYBYTES + sizeof(IP_Port) + sizeof(uint32_t)];
if (ping_array_check(data, sizeof(data), &onion_c->announce_ping_array, sback) != sizeof(data))
return ~0;
memcpy(ret_pubkey, data + sizeof(uint32_t), crypto_box_PUBLICKEYBYTES);
memcpy(ret_ip_port, data + sizeof(uint32_t) + crypto_box_PUBLICKEYBYTES, sizeof(IP_Port));
memcpy(path_num, data + sizeof(uint32_t) + crypto_box_PUBLICKEYBYTES + sizeof(IP_Port), sizeof(uint32_t));
uint32_t num;
memcpy(&num, data, sizeof(uint32_t));
return num;
@ -256,8 +261,17 @@ static int client_send_announce_request(Onion_Client *onion_c, uint32_t num, IP_
return -1;
uint64_t sendback;
Onion_Path path;
if (new_sendback(onion_c, num, dest_pubkey, dest, &sendback) == -1)
if (num == 0) {
if (random_path(onion_c, &onion_c->onion_paths, pathnum, &path) == -1)
return -1;
} else {
if (random_path(onion_c, &onion_c->friends_list[num - 1].onion_paths, pathnum, &path) == -1)
return -1;
}
if (new_sendback(onion_c, num, dest_pubkey, dest, path.path_num, &sendback) == -1)
return -1;
uint8_t zero_ping_id[ONION_PING_ID_SIZE] = {0};
@ -265,8 +279,6 @@ static int client_send_announce_request(Onion_Client *onion_c, uint32_t num, IP_
if (ping_id == NULL)
ping_id = zero_ping_id;
Onion_Path path;
Node_format dest_node;
dest_node.ip_port = dest;
memcpy(dest_node.client_id, dest_pubkey, crypto_box_PUBLICKEYBYTES);
@ -274,16 +286,10 @@ static int client_send_announce_request(Onion_Client *onion_c, uint32_t num, IP_
int len;
if (num == 0) {
if (random_path(onion_c, &onion_c->onion_paths, pathnum, &path) == -1)
return -1;
len = create_announce_request(request, sizeof(request), dest_pubkey, onion_c->c->self_public_key,
onion_c->c->self_secret_key, ping_id, onion_c->c->self_public_key, onion_c->temp_public_key, sendback);
} else {
if (random_path(onion_c, &onion_c->friends_list[num - 1].onion_paths, pathnum, &path) == -1)
return -1;
len = create_announce_request(request, sizeof(request), dest_pubkey, onion_c->friends_list[num - 1].temp_public_key,
onion_c->friends_list[num - 1].temp_secret_key, ping_id, onion_c->friends_list[num - 1].real_client_id, zero_ping_id,
sendback);
@ -326,7 +332,7 @@ static int cmp_entry(const void *a, const void *b)
}
static int client_add_to_list(Onion_Client *onion_c, uint32_t num, const uint8_t *public_key, IP_Port ip_port,
uint8_t is_stored, const uint8_t *pingid_or_key, IP_Port source)
uint8_t is_stored, const uint8_t *pingid_or_key, uint32_t path_num)
{
if (num > onion_c->num_friends)
return -1;
@ -385,7 +391,7 @@ static int client_add_to_list(Onion_Client *onion_c, uint32_t num, const uint8_t
list_nodes[index].is_stored = is_stored;
list_nodes[index].timestamp = unix_time();
list_nodes[index].last_pinged = 0;
list_nodes[index].path_used = set_path_timeouts(onion_c, num, source);
list_nodes[index].path_used = set_path_timeouts(onion_c, num, path_num);
return 0;
}
@ -470,7 +476,8 @@ static int handle_announce_response(void *object, IP_Port source, const uint8_t
uint8_t public_key[crypto_box_PUBLICKEYBYTES];
IP_Port ip_port;
uint32_t num = check_sendback(onion_c, packet + 1, public_key, &ip_port);
uint32_t path_num;
uint32_t num = check_sendback(onion_c, packet + 1, public_key, &ip_port, &path_num);
if (num > onion_c->num_friends)
return 1;
@ -495,7 +502,7 @@ static int handle_announce_response(void *object, IP_Port source, const uint8_t
if ((uint32_t)len != sizeof(plain))
return 1;
if (client_add_to_list(onion_c, num, public_key, ip_port, plain[0], plain + 1, source) == -1)
if (client_add_to_list(onion_c, num, public_key, ip_port, plain[0], plain + 1, path_num) == -1)
return 1;
if (len_nodes != 0) {