1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
#include "packets.hpp"
// packets.cpp - palatable socket buffer accessors
//
// Copyright © 2014 Ben Longbons <b.r.longbons@gmail.com>
//
// This file is part of The Mana World (Athena server)
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "../io/cxxstdio.hpp"
#include "../io/write.hpp"
#include "../poison.hpp"
namespace tmwa
{
size_t packet_avail(Session *s)
{
return s->rdata_size - s->rdata_pos;
}
bool packet_fetch(Session *s, size_t offset, Byte *data, size_t sz)
{
if (packet_avail(s) < offset + sz)
return false;
const Byte *start = reinterpret_cast<const Byte *>(&s->rdata[s->rdata_pos + offset]);
const Byte *end = start + sz;
std::copy(start, end, data);
return true;
}
void packet_discard(Session *s, size_t sz)
{
s->rdata_pos += sz;
assert (s->rdata_size >= s->rdata_pos);
}
bool packet_send(Session *s, const Byte *data, size_t sz)
{
if (s->wdata_size + sz > s->max_wdata)
{
realloc_fifo(s, s->max_rdata, s->max_wdata << 1);
PRINTF("socket: %d wdata expanded to %zu bytes.\n"_fmt, s, s->max_wdata);
}
if (!s->max_wdata || !s->wdata)
{
return false;
}
s->wdata_size += sz;
Byte *end = reinterpret_cast<Byte *>(&s->wdata[s->wdata_size + 0]);
Byte *start = end - sz;
std::copy(data, data + sz, start);
return true;
}
void packet_dump(Session *s)
{
FPRINTF(stderr,
"---- 00-01-02-03-04-05-06-07 08-09-0A-0B-0C-0D-0E-0F\n"_fmt);
char tmpstr[16 + 1] {};
int i;
for (i = 0; i < packet_avail(s); i++)
{
if ((i & 15) == 0)
FPRINTF(stderr, "%04X "_fmt, i);
Byte rfifob_ib;
rfifob_ib.value = 0;
packet_fetch(s, i, &rfifob_ib, 1);
uint8_t rfifob_i = rfifob_ib.value;
FPRINTF(stderr, "%02x "_fmt, rfifob_i);
if (rfifob_i > 0x1f)
tmpstr[i % 16] = rfifob_i;
else
tmpstr[i % 16] = '.';
if ((i - 7) % 16 == 0) // -8 + 1
FPRINTF(stderr, " "_fmt);
else if ((i + 1) % 16 == 0)
{
FPRINTF(stderr, " %s\n"_fmt, tmpstr);
std::fill(tmpstr + 0, tmpstr + 17, '\0');
}
}
if (i % 16 != 0)
{
for (int j = i; j % 16 != 0; j++)
{
FPRINTF(stderr, " "_fmt);
if ((j - 7) % 16 == 0) // -8 + 1
FPRINTF(stderr, " "_fmt);
}
FPRINTF(stderr, " %s\n"_fmt, tmpstr);
}
FPRINTF(stderr, "\n"_fmt);
}
} // namespace tmwa
|
