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Attempted fix of UDP disconnect bug that happens when both ipv4 and ipv6 are connected.

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irungentoo 2015-11-11 18:58:41 -05:00
parent 6b7f1deb79
commit 22634a4b93
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GPG Key ID: 10349DC9BED89E98
2 changed files with 114 additions and 37 deletions
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139
toxcore/net_crypto.c
View File

@ -384,6 +384,78 @@ static Crypto_Connection *get_crypto_connection(const Net_Crypto *c, int crypt_c
}
/* Associate an ip_port to a connection.
*
* return -1 on failure.
* return 0 on success.
*/
static int add_ip_port_connection(Net_Crypto *c, int crypt_connection_id, IP_Port ip_port)
{
Crypto_Connection *conn = get_crypto_connection(c, crypt_connection_id);
if (conn == 0)
return -1;
if (ip_port.ip.family == AF_INET) {
if (!ipport_equal(&ip_port, &conn->ip_portv4) && LAN_ip(conn->ip_portv4.ip) != 0) {
if (!bs_list_add(&c->ip_port_list, (uint8_t *)&ip_port, crypt_connection_id))
return -1;
bs_list_remove(&c->ip_port_list, (uint8_t *)&conn->ip_portv4, crypt_connection_id);
conn->ip_portv4 = ip_port;
return 0;
}
} else if (ip_port.ip.family == AF_INET6) {
if (!ipport_equal(&ip_port, &conn->ip_portv6)) {
if (!bs_list_add(&c->ip_port_list, (uint8_t *)&ip_port, crypt_connection_id))
return -1;
bs_list_remove(&c->ip_port_list, (uint8_t *)&conn->ip_portv6, crypt_connection_id);
conn->ip_portv6 = ip_port;
return 0;
}
}
return -1;
}
/* Return the IP_Port that should be used to send packets to the other peer.
*
* return IP_Port with family 0 on failure.
* return IP_Port on success.
*/
IP_Port return_ip_port_connection(Net_Crypto *c, int crypt_connection_id)
{
IP_Port empty;
empty.ip.family = 0;
Crypto_Connection *conn = get_crypto_connection(c, crypt_connection_id);
if (conn == 0)
return empty;
uint64_t current_time = unix_time();
_Bool v6 = 0, v4 = 0;
if ((UDP_DIRECT_TIMEOUT + conn->direct_lastrecv_timev4) > current_time) {
v4 = 1;
}
if ((UDP_DIRECT_TIMEOUT + conn->direct_lastrecv_timev6) > current_time) {
v6 = 1;
}
if (v4 && LAN_ip(conn->ip_portv4.ip) == 0) {
return conn->ip_portv4;
} else if (v6 && conn->ip_portv6.ip.family == AF_INET6) {
return conn->ip_portv6;
} else if (conn->ip_portv4.ip.family == AF_INET) {
return conn->ip_portv4;
} else {
return empty;
}
}
/* Sends a packet to the peer using the fastest route.
*
* return -1 on failure.
@ -400,14 +472,15 @@ static int send_packet_to(Net_Crypto *c, int crypt_connection_id, const uint8_t
int direct_send_attempt = 0;
pthread_mutex_lock(&conn->mutex);
IP_Port ip_port = return_ip_port_connection(c, crypt_connection_id);
//TODO: on bad networks, direct connections might not last indefinitely.
if (conn->ip_port.ip.family != 0) {
if (ip_port.ip.family != 0) {
_Bool direct_connected = 0;
crypto_connection_status(c, crypt_connection_id, &direct_connected, NULL);
if (direct_connected) {
if ((uint32_t)sendpacket(c->dht->net, conn->ip_port, data, length) == length) {
if ((uint32_t)sendpacket(c->dht->net, ip_port, data, length) == length) {
pthread_mutex_unlock(&conn->mutex);
return 0;
} else {
@ -418,7 +491,7 @@ static int send_packet_to(Net_Crypto *c, int crypt_connection_id, const uint8_t
//TODO: a better way of sending packets directly to confirm the others ip.
if (length < 96 || data[0] == NET_PACKET_COOKIE_REQUEST || data[0] == NET_PACKET_CRYPTO_HS) {
if ((uint32_t)sendpacket(c->dht->net, conn->ip_port, data, length) == length)
if ((uint32_t)sendpacket(c->dht->net, ip_port, data, length) == length)
direct_send_attempt = 1;
}
}
@ -1474,15 +1547,15 @@ static int crypto_connection_add_source(Net_Crypto *c, int crypt_connection_id,
return -1;
if (source.ip.family == AF_INET || source.ip.family == AF_INET6) {
if (!ipport_equal(&source, &conn->ip_port)) {
if (!bs_list_add(&c->ip_port_list, (uint8_t *)&source, crypt_connection_id))
if (add_ip_port_connection(c, crypt_connection_id, source) != 0)
return -1;
bs_list_remove(&c->ip_port_list, (uint8_t *)&conn->ip_port, crypt_connection_id);
conn->ip_port = source;
if (source.ip.family == AF_INET) {
conn->direct_lastrecv_timev4 = unix_time();
} else {
conn->direct_lastrecv_timev6 = unix_time();
}
conn->direct_lastrecv_time = unix_time();
return 0;
} else if (source.ip.family == TCP_FAMILY) {
if (add_tcp_number_relay_connection(c->tcp_c, conn->connection_number_tcp, source.ip.ip6.uint32[0]) == 0)
@ -1684,33 +1757,23 @@ int set_direct_ip_port(Net_Crypto *c, int crypt_connection_id, IP_Port ip_port,
if (conn == 0)
return -1;
if (ip_port.ip.family != AF_INET && ip_port.ip.family != AF_INET6)
return -1;
if (!ipport_equal(&ip_port, &conn->ip_port)) {
if ((UDP_DIRECT_TIMEOUT + conn->direct_lastrecv_time) > unix_time()) {
/* We already know a LAN ip, no need to switch. */
if (LAN_ip(conn->ip_port.ip) == 0)
return -1;
/* Prefer ipv6. */
if (conn->ip_port.ip.family == AF_INET6 && ip_port.ip.family == AF_INET)
return -1;
}
if (bs_list_add(&c->ip_port_list, (uint8_t *)&ip_port, crypt_connection_id)) {
bs_list_remove(&c->ip_port_list, (uint8_t *)&conn->ip_port, crypt_connection_id);
conn->ip_port = ip_port;
if (add_ip_port_connection(c, crypt_connection_id, ip_port) == 0) {
if (connected) {
conn->direct_lastrecv_time = unix_time();
if (ip_port.ip.family == AF_INET) {
conn->direct_lastrecv_timev4 = unix_time();
} else {
conn->direct_lastrecv_time = 0;
conn->direct_lastrecv_timev6 = unix_time();
}
} else {
if (ip_port.ip.family == AF_INET) {
conn->direct_lastrecv_timev4 = 0;
} else {
conn->direct_lastrecv_timev6 = 0;
}
}
return 0;
}
}
return -1;
}
@ -2019,7 +2082,13 @@ static int udp_handle_packet(void *object, IP_Port source, const uint8_t *packet
return -1;
pthread_mutex_lock(&conn->mutex);
conn->direct_lastrecv_time = unix_time();
if (source.ip.family == AF_INET) {
conn->direct_lastrecv_timev4 = unix_time();
} else {
conn->direct_lastrecv_timev6 = unix_time();
}
pthread_mutex_unlock(&conn->mutex);
return 0;
}
@ -2364,7 +2433,8 @@ int crypto_kill(Net_Crypto *c, int crypt_connection_id)
kill_tcp_connection_to(c->tcp_c, conn->connection_number_tcp);
pthread_mutex_unlock(&c->tcp_mutex);
bs_list_remove(&c->ip_port_list, (uint8_t *)&conn->ip_port, crypt_connection_id);
bs_list_remove(&c->ip_port_list, (uint8_t *)&conn->ip_portv4, crypt_connection_id);
bs_list_remove(&c->ip_port_list, (uint8_t *)&conn->ip_portv6, crypt_connection_id);
clear_temp_packet(c, crypt_connection_id);
clear_buffer(&conn->send_array);
clear_buffer(&conn->recv_array);
@ -2392,7 +2462,12 @@ unsigned int crypto_connection_status(const Net_Crypto *c, int crypt_connection_
if (direct_connected) {
*direct_connected = 0;
if ((UDP_DIRECT_TIMEOUT + conn->direct_lastrecv_time) > unix_time())
uint64_t current_time = unix_time();
if ((UDP_DIRECT_TIMEOUT + conn->direct_lastrecv_timev4) > current_time)
*direct_connected = 1;
if ((UDP_DIRECT_TIMEOUT + conn->direct_lastrecv_timev6) > current_time)
*direct_connected = 1;
}

6
toxcore/net_crypto.h
View File

@ -119,8 +119,10 @@ typedef struct {
uint64_t temp_packet_sent_time; /* The time at which the last temp_packet was sent in ms. */
uint32_t temp_packet_num_sent;
IP_Port ip_port; /* The ip and port to contact this guy directly.*/
uint64_t direct_lastrecv_time; /* The Time at which we last received a direct packet in ms. */
IP_Port ip_portv4; /* The ip and port to contact this guy directly.*/
IP_Port ip_portv6;
uint64_t direct_lastrecv_timev4; /* The Time at which we last received a direct packet in ms. */
uint64_t direct_lastrecv_timev6;
Packets_Array send_array;
Packets_Array recv_array;