| … | |
… | |
| 31 | # include <sys/socket.h> |
31 | # include <sys/socket.h> |
| 32 | # include <netinet/in.h> |
32 | # include <netinet/in.h> |
| 33 | # include <netinet/tcp.h> |
33 | # include <netinet/tcp.h> |
| 34 | #endif |
34 | #endif |
| 35 | |
35 | |
| 36 | // disconnect a socket after this many seconds without an ack |
|
|
| 37 | #define SOCKET_TIMEOUT 8. |
|
|
| 38 | |
|
|
| 39 | // force a packet when idle for more than this many seconds, |
36 | // force a packet when idle for more than this many seconds, |
| 40 | // forcing an ack regularly. |
37 | // forcing an ack regularly. |
| 41 | #define IDLE_PING 2. |
38 | #define IDLE_PING 2. |
| 42 | |
39 | |
| 43 | void |
40 | void |
| 44 | client::flush () |
41 | client::flush () |
| 45 | { |
42 | { |
| 46 | if (destroyed ()) |
43 | if (destroyed ()) |
| 47 | return; |
44 | return; |
| 48 | |
|
|
| 49 | #if HAVE_TCP_INFO |
|
|
| 50 | // check time of last ack, and, if too old, kill connection |
|
|
| 51 | socklen_t len = sizeof (tcpi); |
|
|
| 52 | |
|
|
| 53 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
|
|
| 54 | { |
|
|
| 55 | if (tcpi.tcpi_snd_mss) |
|
|
| 56 | mss = tcpi.tcpi_snd_mss; |
|
|
| 57 | |
|
|
| 58 | #if 0 |
|
|
| 59 | fprintf (stderr, "uack %d ack %d lost %d ret %d fack %d sst %d cwnd %d mss %d pmtu %d advmss %d EXC %d\n", |
|
|
| 60 | tcpi.tcpi_unacked, |
|
|
| 61 | tcpi.tcpi_sacked, |
|
|
| 62 | tcpi.tcpi_lost, |
|
|
| 63 | tcpi.tcpi_retrans, |
|
|
| 64 | tcpi.tcpi_fackets, |
|
|
| 65 | tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu, tcpi.tcpi_advmss, |
|
|
| 66 | |
|
|
| 67 | tcpi.tcpi_snd_cwnd - (tcpi.tcpi_unacked - tcpi.tcpi_sacked)); |
|
|
| 68 | #endif |
|
|
| 69 | |
|
|
| 70 | // do this only when player is active |
|
|
| 71 | if (pl && pl->active |
|
|
| 72 | && tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
|
|
| 73 | { |
|
|
| 74 | send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
|
|
| 75 | write_outputbuffer (); |
|
|
| 76 | |
|
|
| 77 | LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
|
|
| 78 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
|
|
| 79 | destroy (); |
|
|
| 80 | } |
|
|
| 81 | } |
|
|
| 82 | #endif |
|
|
| 83 | |
45 | |
| 84 | /** |
46 | /** |
| 85 | * Writes data to socket. |
47 | * Writes data to socket. |
| 86 | * |
48 | * |
| 87 | * When the socket is clear to write, and we have backlogged data, this |
49 | * When the socket is clear to write, and we have backlogged data, this |
