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
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
/*
* ngtcp2
*
* Copyright (c) 2023 ngtcp2 contributors
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "ngtcp2_frame_chain.h"
#include <string.h>
#include <assert.h>
ngtcp2_objalloc_def(frame_chain, ngtcp2_frame_chain, oplent);
int ngtcp2_frame_chain_new(ngtcp2_frame_chain **pfrc, const ngtcp2_mem *mem) {
*pfrc = ngtcp2_mem_malloc(mem, sizeof(ngtcp2_frame_chain));
if (*pfrc == NULL) {
return NGTCP2_ERR_NOMEM;
}
ngtcp2_frame_chain_init(*pfrc);
return 0;
}
int ngtcp2_frame_chain_objalloc_new(ngtcp2_frame_chain **pfrc,
ngtcp2_objalloc *objalloc) {
*pfrc = ngtcp2_objalloc_frame_chain_get(objalloc);
if (*pfrc == NULL) {
return NGTCP2_ERR_NOMEM;
}
ngtcp2_frame_chain_init(*pfrc);
return 0;
}
int ngtcp2_frame_chain_extralen_new(ngtcp2_frame_chain **pfrc, size_t extralen,
const ngtcp2_mem *mem) {
*pfrc = ngtcp2_mem_malloc(mem, sizeof(ngtcp2_frame_chain) + extralen);
if (*pfrc == NULL) {
return NGTCP2_ERR_NOMEM;
}
ngtcp2_frame_chain_init(*pfrc);
return 0;
}
int ngtcp2_frame_chain_stream_datacnt_objalloc_new(ngtcp2_frame_chain **pfrc,
size_t datacnt,
ngtcp2_objalloc *objalloc,
const ngtcp2_mem *mem) {
if (datacnt > NGTCP2_FRAME_CHAIN_STREAM_DATACNT_THRES) {
return ngtcp2_frame_chain_extralen_new(pfrc,
sizeof(ngtcp2_vec) * (datacnt - 1) -
NGTCP2_FRAME_CHAIN_STREAM_AVAIL,
mem);
}
return ngtcp2_frame_chain_objalloc_new(pfrc, objalloc);
}
int ngtcp2_frame_chain_new_token_objalloc_new(ngtcp2_frame_chain **pfrc,
const uint8_t *token,
size_t tokenlen,
ngtcp2_objalloc *objalloc,
const ngtcp2_mem *mem) {
size_t avail = sizeof(ngtcp2_frame) - sizeof(ngtcp2_new_token);
int rv;
uint8_t *p;
ngtcp2_frame *fr;
if (tokenlen > avail) {
rv = ngtcp2_frame_chain_extralen_new(pfrc, tokenlen - avail, mem);
} else {
rv = ngtcp2_frame_chain_objalloc_new(pfrc, objalloc);
}
if (rv != 0) {
return rv;
}
fr = &(*pfrc)->fr;
fr->type = NGTCP2_FRAME_NEW_TOKEN;
p = (uint8_t *)fr + sizeof(ngtcp2_new_token);
memcpy(p, token, tokenlen);
fr->new_token.token = p;
fr->new_token.tokenlen = tokenlen;
return 0;
}
void ngtcp2_frame_chain_del(ngtcp2_frame_chain *frc, const ngtcp2_mem *mem) {
ngtcp2_frame_chain_binder *binder;
if (frc == NULL) {
return;
}
binder = frc->binder;
if (binder && --binder->refcount == 0) {
ngtcp2_mem_free(mem, binder);
}
ngtcp2_mem_free(mem, frc);
}
void ngtcp2_frame_chain_objalloc_del(ngtcp2_frame_chain *frc,
ngtcp2_objalloc *objalloc,
const ngtcp2_mem *mem) {
ngtcp2_frame_chain_binder *binder;
if (frc == NULL) {
return;
}
switch (frc->fr.type) {
case NGTCP2_FRAME_CRYPTO:
case NGTCP2_FRAME_STREAM:
if (frc->fr.stream.datacnt > NGTCP2_FRAME_CHAIN_STREAM_DATACNT_THRES) {
ngtcp2_frame_chain_del(frc, mem);
return;
}
break;
case NGTCP2_FRAME_NEW_TOKEN:
if (frc->fr.new_token.tokenlen >
sizeof(ngtcp2_frame) - sizeof(ngtcp2_new_token)) {
ngtcp2_frame_chain_del(frc, mem);
return;
}
break;
}
binder = frc->binder;
if (binder && --binder->refcount == 0) {
ngtcp2_mem_free(mem, binder);
}
frc->binder = NULL;
ngtcp2_objalloc_frame_chain_release(objalloc, frc);
}
void ngtcp2_frame_chain_init(ngtcp2_frame_chain *frc) {
frc->next = NULL;
frc->binder = NULL;
}
void ngtcp2_frame_chain_list_objalloc_del(ngtcp2_frame_chain *frc,
ngtcp2_objalloc *objalloc,
const ngtcp2_mem *mem) {
ngtcp2_frame_chain *next;
for (; frc; frc = next) {
next = frc->next;
ngtcp2_frame_chain_objalloc_del(frc, objalloc, mem);
}
}
int ngtcp2_frame_chain_binder_new(ngtcp2_frame_chain_binder **pbinder,
const ngtcp2_mem *mem) {
*pbinder = ngtcp2_mem_calloc(mem, 1, sizeof(ngtcp2_frame_chain_binder));
if (*pbinder == NULL) {
return NGTCP2_ERR_NOMEM;
}
return 0;
}
int ngtcp2_bind_frame_chains(ngtcp2_frame_chain *a, ngtcp2_frame_chain *b,
const ngtcp2_mem *mem) {
ngtcp2_frame_chain_binder *binder;
int rv;
assert(b->binder == NULL);
if (a->binder == NULL) {
rv = ngtcp2_frame_chain_binder_new(&binder, mem);
if (rv != 0) {
return rv;
}
a->binder = binder;
++a->binder->refcount;
}
b->binder = a->binder;
++b->binder->refcount;
return 0;
}
|
