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1 | /* |
2 | * Copyright 2022 The OpenSSL Project Authors. All Rights Reserved. | |
3 | * | |
4 | * Licensed under the Apache License 2.0 (the "License"). You may not use | |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8 | */ | |
9 | ||
10 | #include "internal/quic_txpim.h" | |
11 | #include <stdlib.h> | |
12 | ||
13 | typedef struct quic_txpim_pkt_ex_st QUIC_TXPIM_PKT_EX; | |
14 | ||
15 | struct quic_txpim_pkt_ex_st { | |
16 | QUIC_TXPIM_PKT public; | |
17 | QUIC_TXPIM_PKT_EX *prev, *next; | |
18 | QUIC_TXPIM_CHUNK *chunks; | |
19 | size_t num_chunks, alloc_chunks; | |
20 | unsigned int chunks_need_sort : 1; | |
21 | }; | |
22 | ||
23 | typedef struct quic_txpim_pkt_ex_list { | |
24 | QUIC_TXPIM_PKT_EX *head, *tail; | |
25 | } QUIC_TXPIM_PKT_EX_LIST; | |
26 | ||
27 | struct quic_txpim_st { | |
28 | QUIC_TXPIM_PKT_EX_LIST free_list; | |
29 | size_t in_use; | |
30 | }; | |
31 | ||
32 | #define MAX_ALLOC_CHUNKS 512 | |
33 | ||
34 | QUIC_TXPIM *ossl_quic_txpim_new(void) | |
35 | { | |
36 | QUIC_TXPIM *txpim = OPENSSL_zalloc(sizeof(*txpim)); | |
37 | if (txpim == NULL) | |
38 | return NULL; | |
39 | ||
40 | return txpim; | |
41 | } | |
42 | ||
43 | static void free_list(QUIC_TXPIM_PKT_EX_LIST *l) | |
44 | { | |
45 | QUIC_TXPIM_PKT_EX *n, *nnext; | |
46 | ||
47 | for (n = l->head; n != NULL; n = nnext) { | |
48 | nnext = n->next; | |
49 | ||
50 | OPENSSL_free(n->chunks); | |
51 | OPENSSL_free(n); | |
52 | } | |
53 | ||
54 | l->head = l->tail = NULL; | |
55 | } | |
56 | ||
57 | void ossl_quic_txpim_free(QUIC_TXPIM *txpim) | |
58 | { | |
59 | if (txpim == NULL) | |
60 | return; | |
61 | ||
62 | assert(txpim->in_use == 0); | |
63 | free_list(&txpim->free_list); | |
64 | OPENSSL_free(txpim); | |
65 | } | |
66 | ||
67 | static void list_remove(QUIC_TXPIM_PKT_EX_LIST *l, QUIC_TXPIM_PKT_EX *n) | |
68 | { | |
69 | if (l->head == n) | |
70 | l->head = n->next; | |
71 | if (l->tail == n) | |
72 | l->tail = n->prev; | |
73 | if (n->prev != NULL) | |
74 | n->prev->next = n->next; | |
75 | if (n->next != NULL) | |
76 | n->next->prev = n->prev; | |
77 | n->prev = n->next = NULL; | |
78 | } | |
79 | ||
80 | static void list_insert_tail(QUIC_TXPIM_PKT_EX_LIST *l, QUIC_TXPIM_PKT_EX *n) | |
81 | { | |
82 | n->prev = l->tail; | |
83 | n->next = NULL; | |
84 | l->tail = n; | |
85 | if (n->prev != NULL) | |
86 | n->prev->next = n; | |
87 | if (l->head == NULL) | |
88 | l->head = n; | |
89 | } | |
90 | ||
91 | static QUIC_TXPIM_PKT_EX *txpim_get_free(QUIC_TXPIM *txpim) | |
92 | { | |
93 | QUIC_TXPIM_PKT_EX *ex = txpim->free_list.head; | |
94 | ||
95 | if (ex != NULL) | |
96 | return ex; | |
97 | ||
98 | ex = OPENSSL_zalloc(sizeof(*ex)); | |
99 | if (ex == NULL) | |
100 | return NULL; | |
101 | ||
102 | list_insert_tail(&txpim->free_list, ex); | |
103 | return ex; | |
104 | } | |
105 | ||
106 | static void txpim_clear(QUIC_TXPIM_PKT_EX *ex) | |
107 | { | |
108 | memset(&ex->public.ackm_pkt, 0, sizeof(ex->public.ackm_pkt)); | |
109 | ossl_quic_txpim_pkt_clear_chunks(&ex->public); | |
110 | ex->public.retx_head = NULL; | |
111 | ex->public.fifd = NULL; | |
112 | ex->public.had_handshake_done_frame = 0; | |
113 | ex->public.had_max_data_frame = 0; | |
0ede517c HL |
114 | ex->public.had_max_streams_bidi_frame = 0; |
115 | ex->public.had_max_streams_uni_frame = 0; | |
d77aea59 HL |
116 | ex->public.had_ack_frame = 0; |
117 | } | |
118 | ||
119 | QUIC_TXPIM_PKT *ossl_quic_txpim_pkt_alloc(QUIC_TXPIM *txpim) | |
120 | { | |
121 | QUIC_TXPIM_PKT_EX *ex = txpim_get_free(txpim); | |
122 | ||
123 | if (ex == NULL) | |
124 | return NULL; | |
125 | ||
126 | txpim_clear(ex); | |
127 | list_remove(&txpim->free_list, ex); | |
128 | ++txpim->in_use; | |
129 | return &ex->public; | |
130 | } | |
131 | ||
132 | void ossl_quic_txpim_pkt_release(QUIC_TXPIM *txpim, QUIC_TXPIM_PKT *fpkt) | |
133 | { | |
134 | QUIC_TXPIM_PKT_EX *ex = (QUIC_TXPIM_PKT_EX *)fpkt; | |
135 | ||
136 | assert(txpim->in_use > 0); | |
137 | --txpim->in_use; | |
138 | list_insert_tail(&txpim->free_list, ex); | |
139 | } | |
140 | ||
141 | void ossl_quic_txpim_pkt_add_cfq_item(QUIC_TXPIM_PKT *fpkt, | |
142 | QUIC_CFQ_ITEM *item) | |
143 | { | |
144 | item->pkt_next = fpkt->retx_head; | |
145 | item->pkt_prev = NULL; | |
146 | fpkt->retx_head = item; | |
147 | } | |
148 | ||
149 | void ossl_quic_txpim_pkt_clear_chunks(QUIC_TXPIM_PKT *fpkt) | |
150 | { | |
151 | QUIC_TXPIM_PKT_EX *ex = (QUIC_TXPIM_PKT_EX *)fpkt; | |
152 | ||
153 | ex->num_chunks = 0; | |
154 | } | |
155 | ||
156 | int ossl_quic_txpim_pkt_append_chunk(QUIC_TXPIM_PKT *fpkt, | |
157 | const QUIC_TXPIM_CHUNK *chunk) | |
158 | { | |
159 | QUIC_TXPIM_PKT_EX *ex = (QUIC_TXPIM_PKT_EX *)fpkt; | |
160 | QUIC_TXPIM_CHUNK *new_chunk; | |
161 | size_t new_alloc_chunks = ex->alloc_chunks; | |
162 | ||
163 | if (ex->num_chunks == ex->alloc_chunks) { | |
164 | new_alloc_chunks = (ex->alloc_chunks == 0) ? 4 : ex->alloc_chunks * 8 / 5; | |
165 | if (new_alloc_chunks > MAX_ALLOC_CHUNKS) | |
166 | new_alloc_chunks = MAX_ALLOC_CHUNKS; | |
167 | if (ex->num_chunks == new_alloc_chunks) | |
168 | return 0; | |
169 | ||
170 | new_chunk = OPENSSL_realloc(ex->chunks, | |
171 | new_alloc_chunks * sizeof(QUIC_TXPIM_CHUNK)); | |
172 | if (new_chunk == NULL) | |
173 | return 0; | |
174 | ||
175 | ex->chunks = new_chunk; | |
176 | ex->alloc_chunks = new_alloc_chunks; | |
177 | } | |
178 | ||
179 | ex->chunks[ex->num_chunks++] = *chunk; | |
180 | ex->chunks_need_sort = 1; | |
181 | return 1; | |
182 | } | |
183 | ||
184 | static int compare(const void *a, const void *b) | |
185 | { | |
186 | const QUIC_TXPIM_CHUNK *ac = a, *bc = b; | |
187 | ||
188 | if (ac->stream_id < bc->stream_id) | |
189 | return -1; | |
190 | else if (ac->stream_id > bc->stream_id) | |
191 | return 1; | |
192 | ||
193 | if (ac->start < bc->start) | |
194 | return -1; | |
195 | else if (ac->start > bc->start) | |
196 | return 1; | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
201 | const QUIC_TXPIM_CHUNK *ossl_quic_txpim_pkt_get_chunks(QUIC_TXPIM_PKT *fpkt) | |
202 | { | |
203 | QUIC_TXPIM_PKT_EX *ex = (QUIC_TXPIM_PKT_EX *)fpkt; | |
204 | ||
205 | if (ex->chunks_need_sort) { | |
0ede517c HL |
206 | /* |
207 | * List of chunks will generally be very small so there is no issue | |
208 | * simply sorting here. | |
209 | */ | |
d77aea59 HL |
210 | qsort(ex->chunks, ex->num_chunks, sizeof(QUIC_TXPIM_CHUNK), compare); |
211 | ex->chunks_need_sort = 0; | |
212 | } | |
213 | ||
214 | return ex->chunks; | |
215 | } | |
216 | ||
217 | size_t ossl_quic_txpim_pkt_get_num_chunks(QUIC_TXPIM_PKT *fpkt) | |
218 | { | |
219 | QUIC_TXPIM_PKT_EX *ex = (QUIC_TXPIM_PKT_EX *)fpkt; | |
220 | ||
221 | return ex->num_chunks; | |
222 | } | |
0ede517c HL |
223 | |
224 | size_t ossl_quic_txpim_get_in_use(QUIC_TXPIM *txpim) | |
225 | { | |
226 | return txpim->in_use; | |
227 | } |