| … | |
… | |
| 71 | |
71 | |
| 72 | bool recv_ok (u32 seqno) |
72 | bool recv_ok (u32 seqno) |
| 73 | { |
73 | { |
| 74 | if (seqno <= seq - WINDOWSIZE) |
74 | if (seqno <= seq - WINDOWSIZE) |
| 75 | slog (L_ERR, _("received duplicate or outdated packet (received %08lx, expected %08lx)\n" |
75 | slog (L_ERR, _("received duplicate or outdated packet (received %08lx, expected %08lx)\n" |
| 76 | "possible replay attack, or just massive packet reordering"), seqno, seq + 1);//D |
76 | "possible replay attack, or just massive packet reordering"), seqno, seq + 1); |
| 77 | else if (seqno > seq + WINDOWSIZE) |
77 | else if (seqno > seq + WINDOWSIZE * 4) |
| 78 | slog (L_ERR, _("received duplicate or out-of-sync packet (received %08lx, expected %08lx)\n" |
78 | slog (L_ERR, _("received duplicate or out-of-sync packet (received %08lx, expected %08lx)\n" |
| 79 | "possible replay attack, or just massive packet loss"), seqno, seq + 1);//D |
79 | "possible replay attack, or just massive packet loss"), seqno, seq + 1); |
| 80 | else |
80 | else |
| 81 | { |
81 | { |
| 82 | while (seqno > seq) |
82 | while (seqno > seq) |
| 83 | { |
83 | { |
| 84 | seq++; |
84 | seq++; |
| … | |
… | |
| 93 | u32 s = seqno % WINDOWSIZE; |
93 | u32 s = seqno % WINDOWSIZE; |
| 94 | u32 *cell = v + (s >> 5); |
94 | u32 *cell = v + (s >> 5); |
| 95 | u32 mask = 1 << (s & 31); |
95 | u32 mask = 1 << (s & 31); |
| 96 | |
96 | |
| 97 | if (*cell & mask) |
97 | if (*cell & mask) |
| 98 | { |
|
|
| 99 | slog (L_ERR, _("received duplicate packet (received %08lx, expected %08lx)\n" |
98 | slog (L_ERR, _("received duplicate packet (received %08lx, expected %08lx)\n" |
| 100 | "possible replay attack, or just packet duplication"), seqno, seq + 1);//D |
99 | "possible replay attack, or just packet duplication"), seqno, seq + 1); |
| 101 | return false; |
|
|
| 102 | } |
|
|
| 103 | else |
100 | else |
| 104 | { |
101 | { |
| 105 | *cell |= mask; |
102 | *cell |= mask; |
| 106 | return true; |
103 | return true; |
| 107 | } |
104 | } |
| 108 | } |
105 | } |
|
|
106 | |
|
|
107 | return false; |
| 109 | } |
108 | } |
| 110 | }; |
109 | }; |
| 111 | |
110 | |
| 112 | typedef callback0<const char *> run_script_cb; |
111 | typedef callback0<const char *> run_script_cb; |
| 113 | |
112 | |
