1 | /* |
2 | * Copyright 2016-2018 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 | /* This must be the first #include file */ |
11 | #include "async_local.h" |
12 | |
13 | #include <openssl/err.h> |
14 | |
15 | ASYNC_WAIT_CTX *ASYNC_WAIT_CTX_new(void) |
16 | { |
17 | return OPENSSL_zalloc(sizeof(ASYNC_WAIT_CTX)); |
18 | } |
19 | |
20 | void ASYNC_WAIT_CTX_free(ASYNC_WAIT_CTX *ctx) |
21 | { |
22 | struct fd_lookup_st *curr; |
23 | struct fd_lookup_st *next; |
24 | |
25 | if (ctx == NULL) |
26 | return; |
27 | |
28 | curr = ctx->fds; |
29 | while (curr != NULL) { |
30 | if (!curr->del) { |
31 | /* Only try and cleanup if it hasn't been marked deleted */ |
32 | if (curr->cleanup != NULL) |
33 | curr->cleanup(ctx, curr->key, curr->fd, curr->custom_data); |
34 | } |
35 | /* Always free the fd_lookup_st */ |
36 | next = curr->next; |
37 | OPENSSL_free(curr); |
38 | curr = next; |
39 | } |
40 | |
41 | OPENSSL_free(ctx); |
42 | } |
43 | int ASYNC_WAIT_CTX_set_wait_fd(ASYNC_WAIT_CTX *ctx, const void *key, |
44 | OSSL_ASYNC_FD fd, void *custom_data, |
45 | void (*cleanup)(ASYNC_WAIT_CTX *, const void *, |
46 | OSSL_ASYNC_FD, void *)) |
47 | { |
48 | struct fd_lookup_st *fdlookup; |
49 | |
50 | if ((fdlookup = OPENSSL_zalloc(sizeof(*fdlookup))) == NULL) { |
51 | ASYNCerr(ASYNC_F_ASYNC_WAIT_CTX_SET_WAIT_FD, ERR_R_MALLOC_FAILURE); |
52 | return 0; |
53 | } |
54 | |
55 | fdlookup->key = key; |
56 | fdlookup->fd = fd; |
57 | fdlookup->custom_data = custom_data; |
58 | fdlookup->cleanup = cleanup; |
59 | fdlookup->add = 1; |
60 | fdlookup->next = ctx->fds; |
61 | ctx->fds = fdlookup; |
62 | ctx->numadd++; |
63 | return 1; |
64 | } |
65 | |
66 | int ASYNC_WAIT_CTX_get_fd(ASYNC_WAIT_CTX *ctx, const void *key, |
67 | OSSL_ASYNC_FD *fd, void **custom_data) |
68 | { |
69 | struct fd_lookup_st *curr; |
70 | |
71 | curr = ctx->fds; |
72 | while (curr != NULL) { |
73 | if (curr->del) { |
74 | /* This one has been marked deleted so do nothing */ |
75 | curr = curr->next; |
76 | continue; |
77 | } |
78 | if (curr->key == key) { |
79 | *fd = curr->fd; |
80 | *custom_data = curr->custom_data; |
81 | return 1; |
82 | } |
83 | curr = curr->next; |
84 | } |
85 | return 0; |
86 | } |
87 | |
88 | int ASYNC_WAIT_CTX_get_all_fds(ASYNC_WAIT_CTX *ctx, OSSL_ASYNC_FD *fd, |
89 | size_t *numfds) |
90 | { |
91 | struct fd_lookup_st *curr; |
92 | |
93 | curr = ctx->fds; |
94 | *numfds = 0; |
95 | while (curr != NULL) { |
96 | if (curr->del) { |
97 | /* This one has been marked deleted so do nothing */ |
98 | curr = curr->next; |
99 | continue; |
100 | } |
101 | if (fd != NULL) { |
102 | *fd = curr->fd; |
103 | fd++; |
104 | } |
105 | (*numfds)++; |
106 | curr = curr->next; |
107 | } |
108 | return 1; |
109 | } |
110 | |
111 | int ASYNC_WAIT_CTX_get_changed_fds(ASYNC_WAIT_CTX *ctx, OSSL_ASYNC_FD *addfd, |
112 | size_t *numaddfds, OSSL_ASYNC_FD *delfd, |
113 | size_t *numdelfds) |
114 | { |
115 | struct fd_lookup_st *curr; |
116 | |
117 | *numaddfds = ctx->numadd; |
118 | *numdelfds = ctx->numdel; |
119 | if (addfd == NULL && delfd == NULL) |
120 | return 1; |
121 | |
122 | curr = ctx->fds; |
123 | |
124 | while (curr != NULL) { |
125 | /* We ignore fds that have been marked as both added and deleted */ |
126 | if (curr->del && !curr->add && (delfd != NULL)) { |
127 | *delfd = curr->fd; |
128 | delfd++; |
129 | } |
130 | if (curr->add && !curr->del && (addfd != NULL)) { |
131 | *addfd = curr->fd; |
132 | addfd++; |
133 | } |
134 | curr = curr->next; |
135 | } |
136 | |
137 | return 1; |
138 | } |
139 | |
140 | int ASYNC_WAIT_CTX_clear_fd(ASYNC_WAIT_CTX *ctx, const void *key) |
141 | { |
142 | struct fd_lookup_st *curr, *prev; |
143 | |
144 | curr = ctx->fds; |
145 | prev = NULL; |
146 | while (curr != NULL) { |
147 | if (curr->del == 1) { |
148 | /* This one has been marked deleted already so do nothing */ |
149 | prev = curr; |
150 | curr = curr->next; |
151 | continue; |
152 | } |
153 | if (curr->key == key) { |
154 | /* If fd has just been added, remove it from the list */ |
155 | if (curr->add == 1) { |
156 | if (ctx->fds == curr) { |
157 | ctx->fds = curr->next; |
158 | } else { |
159 | prev->next = curr->next; |
160 | } |
161 | |
162 | /* It is responsibility of the caller to cleanup before calling |
163 | * ASYNC_WAIT_CTX_clear_fd |
164 | */ |
165 | OPENSSL_free(curr); |
166 | ctx->numadd--; |
167 | return 1; |
168 | } |
169 | |
170 | /* |
171 | * Mark it as deleted. We don't call cleanup if explicitly asked |
172 | * to clear an fd. We assume the caller is going to do that (if |
173 | * appropriate). |
174 | */ |
175 | curr->del = 1; |
176 | ctx->numdel++; |
177 | return 1; |
178 | } |
179 | prev = curr; |
180 | curr = curr->next; |
181 | } |
182 | return 0; |
183 | } |
184 | |
185 | int ASYNC_WAIT_CTX_set_callback(ASYNC_WAIT_CTX *ctx, |
186 | ASYNC_callback_fn callback, |
187 | void *callback_arg) |
188 | { |
189 | if (ctx == NULL) |
190 | return 0; |
191 | |
192 | ctx->callback = callback; |
193 | ctx->callback_arg = callback_arg; |
194 | return 1; |
195 | } |
196 | |
197 | int ASYNC_WAIT_CTX_get_callback(ASYNC_WAIT_CTX *ctx, |
198 | ASYNC_callback_fn *callback, |
199 | void **callback_arg) |
200 | { |
201 | if (ctx->callback == NULL) |
202 | return 0; |
203 | |
204 | *callback = ctx->callback; |
205 | *callback_arg = ctx->callback_arg; |
206 | return 1; |
207 | } |
208 | |
209 | int ASYNC_WAIT_CTX_set_status(ASYNC_WAIT_CTX *ctx, int status) |
210 | { |
211 | ctx->status = status; |
212 | return 1; |
213 | } |
214 | |
215 | int ASYNC_WAIT_CTX_get_status(ASYNC_WAIT_CTX *ctx) |
216 | { |
217 | return ctx->status; |
218 | } |
219 | |
220 | void async_wait_ctx_reset_counts(ASYNC_WAIT_CTX *ctx) |
221 | { |
222 | struct fd_lookup_st *curr, *prev = NULL; |
223 | |
224 | ctx->numadd = 0; |
225 | ctx->numdel = 0; |
226 | |
227 | curr = ctx->fds; |
228 | |
229 | while (curr != NULL) { |
230 | if (curr->del) { |
231 | if (prev == NULL) |
232 | ctx->fds = curr->next; |
233 | else |
234 | prev->next = curr->next; |
235 | OPENSSL_free(curr); |
236 | if (prev == NULL) |
237 | curr = ctx->fds; |
238 | else |
239 | curr = prev->next; |
240 | continue; |
241 | } |
242 | if (curr->add) { |
243 | curr->add = 0; |
244 | } |
245 | prev = curr; |
246 | curr = curr->next; |
247 | } |
248 | } |
249 | |