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| 25 | #include <sys/socket.h> |
25 | #include <sys/socket.h> |
| 26 | #include <netinet/in.h> |
26 | #include <netinet/in.h> |
| 27 | |
27 | |
| 28 | #include <map> |
28 | #include <map> |
| 29 | |
29 | |
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30 | #include "iom.h" |
| 30 | #include "device.h" |
31 | #include "device.h" |
| 31 | |
32 | |
| 32 | #define SOCKADDR sockaddr_in // this is lame, I know |
33 | #define SOCKADDR sockaddr_in // this is lame, I know |
| 33 | |
34 | |
| 34 | /* |
35 | /* |
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| 68 | p[4] = id >> 8; |
69 | p[4] = id >> 8; |
| 69 | p[5] = id; |
70 | p[5] = id; |
| 70 | } |
71 | } |
| 71 | |
72 | |
| 72 | #define mac2id(p) (p[0] & 0x01 ? 0 : (p[4] << 8) | p[5]) |
73 | #define mac2id(p) (p[0] & 0x01 ? 0 : (p[4] << 8) | p[5]) |
| 73 | |
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| 74 | // a very simple fifo pkt-queue |
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| 75 | class pkt_queue |
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| 76 | { |
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| 77 | tap_packet *queue[QUEUEDEPTH]; |
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| 78 | int i, j; |
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| 79 | |
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| 80 | public: |
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| 81 | |
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| 82 | void put (tap_packet *p); |
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| 83 | tap_packet *get (); |
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| 84 | |
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| 85 | pkt_queue (); |
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| 86 | ~pkt_queue (); |
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| 87 | }; |
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| 88 | |
74 | |
| 89 | struct sockinfo |
75 | struct sockinfo |
| 90 | { |
76 | { |
| 91 | u32 host; |
77 | u32 host; |
| 92 | u16 port; |
78 | u16 port; |
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| 137 | { |
123 | { |
| 138 | return a.host < b.host |
124 | return a.host < b.host |
| 139 | || (a.host == b.host && a.port < b.port); |
125 | || (a.host == b.host && a.port < b.port); |
| 140 | } |
126 | } |
| 141 | |
127 | |
| 142 | // only do action once every x seconds per host. |
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| 143 | // currently this is quite a slow implementation, |
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| 144 | // but suffices for normal operation. |
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| 145 | struct u32_rate_limiter : private map<u32, time_t> |
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| 146 | { |
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| 147 | int every; |
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| 148 | |
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| 149 | bool can (u32 host); |
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| 150 | |
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| 151 | u32_rate_limiter (time_t every = 1) |
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| 152 | { |
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| 153 | this->every = every; |
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| 154 | } |
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| 155 | }; |
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| 156 | |
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| 157 | struct net_rate_limiter : u32_rate_limiter |
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| 158 | { |
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| 159 | bool can (SOCKADDR *sa) { return u32_rate_limiter::can((u32)sa->sin_addr.s_addr); } |
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| 160 | bool can (sockinfo &si) { return u32_rate_limiter::can((u32)si.host); } |
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| 161 | |
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| 162 | net_rate_limiter (time_t every) : u32_rate_limiter (every) {} |
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| 163 | }; |
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| 164 | |
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| 165 | struct sliding_window { |
128 | struct sliding_window { |
| 166 | u32 v[(WINDOWSIZE + 31) / 32]; |
129 | u32 v[(WINDOWSIZE + 31) / 32]; |
| 167 | u32 seq; |
130 | u32 seq; |
| 168 | |
131 | |
| 169 | void reset (u32 seqno) |
132 | void reset (u32 seqno) |
