| … | |
… | |
| 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 | #define HAVE_SIOCOUTQ 1 //TODO configure.ac support |
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| 37 | #if HAVE_SIOCOUTQ |
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| 38 | # include <linux/sockios.h> |
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| 39 | #endif |
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| 40 | |
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| 41 | // disconnect a socket after this many seconds without an ack |
36 | // disconnect a socket after this many seconds without an ack |
| 42 | #define SOCKET_TIMEOUT 8. |
37 | #define SOCKET_TIMEOUT 8. |
| 43 | |
38 | |
| 44 | // force a packet when idle for more than this many seconds, |
39 | // force a packet when idle for more than this many seconds, |
| 45 | // forcing an ack regularly. |
40 | // forcing an ack regularly. |
| … | |
… | |
| 48 | void |
43 | void |
| 49 | client::flush () |
44 | client::flush () |
| 50 | { |
45 | { |
| 51 | if (destroyed ()) |
46 | if (destroyed ()) |
| 52 | return; |
47 | return; |
| 53 | |
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| 54 | # if HAVE_SIOCOUTQ |
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| 55 | { |
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| 56 | int value; |
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| 57 | |
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| 58 | if (!ioctl (fd, SIOCOUTQ, &value)) |
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| 59 | outq = value; |
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| 60 | } |
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| 61 | # endif |
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| 62 | |
48 | |
| 63 | #if HAVE_TCP_INFO |
49 | #if HAVE_TCP_INFO |
| 64 | // check about once per second, spread evenly over all clients |
50 | // check about once per second, spread evenly over all clients |
| 65 | // do this only when player is active |
51 | // do this only when player is active |
| 66 | if (!((pticks + fd) & 7) && pl && pl->active) |
52 | if (!((pticks + fd) & 7) && pl && pl->active) |
| 67 | { |
53 | { |
| 68 | // check time of last ack, and, if too old, kill connection |
54 | // check time of last ack, and, if too old, kill connection |
| 69 | struct tcp_info tcpi; |
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| 70 | socklen_t len = sizeof (tcpi); |
55 | socklen_t len = sizeof (tcpi); |
| 71 | |
56 | |
| 72 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
57 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
| 73 | { |
58 | { |
| 74 | if (tcpi.tcpi_snd_mss) |
59 | if (tcpi.tcpi_snd_mss) |
| 75 | mss = tcpi.tcpi_snd_mss; |
60 | mss = tcpi.tcpi_snd_mss; |
| 76 | |
61 | |
| 77 | rtt = tcpi.tcpi_rtt; |
62 | fprintf (stderr, "uack %d sst %d cwnd %d mss %d pmtu %d\n", |
| 78 | rttvar = tcpi.tcpi_rttvar; |
63 | tcpi.tcpi_unacked, tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu); |
| 79 | |
64 | |
| 80 | if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
65 | if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
| 81 | { |
66 | { |
| 82 | send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
67 | send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
| 83 | write_outputbuffer (); |
68 | write_outputbuffer (); |
