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/*
* Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/* This must be the first #include file */
#include "async_local.h"
#include <openssl/err.h>
ASYNC_WAIT_CTX *ASYNC_WAIT_CTX_new(void)
{
return OPENSSL_zalloc(sizeof(ASYNC_WAIT_CTX));
}
void ASYNC_WAIT_CTX_free(ASYNC_WAIT_CTX *ctx)
{
struct fd_lookup_st *curr;
struct fd_lookup_st *next;
if (ctx == NULL)
return;
curr = ctx->fds;
while (curr != NULL) {
if (!curr->del) {
/* Only try and cleanup if it hasn't been marked deleted */
if (curr->cleanup != NULL)
curr->cleanup(ctx, curr->key, curr->fd, curr->custom_data);
}
/* Always free the fd_lookup_st */
next = curr->next;
OPENSSL_free(curr);
curr = next;
}
OPENSSL_free(ctx);
}
int ASYNC_WAIT_CTX_set_wait_fd(ASYNC_WAIT_CTX *ctx, const void *key,
OSSL_ASYNC_FD fd, void *custom_data,
void (*cleanup)(ASYNC_WAIT_CTX *, const void *,
OSSL_ASYNC_FD, void *))
{
struct fd_lookup_st *fdlookup;
if ((fdlookup = OPENSSL_zalloc(sizeof(*fdlookup))) == NULL) {
ASYNCerr(ASYNC_F_ASYNC_WAIT_CTX_SET_WAIT_FD, ERR_R_MALLOC_FAILURE);
return 0;
}
fdlookup->key = key;
fdlookup->fd = fd;
fdlookup->custom_data = custom_data;
fdlookup->cleanup = cleanup;
fdlookup->add = 1;
fdlookup->next = ctx->fds;
ctx->fds = fdlookup;
ctx->numadd++;
return 1;
}
int ASYNC_WAIT_CTX_get_fd(ASYNC_WAIT_CTX *ctx, const void *key,
OSSL_ASYNC_FD *fd, void **custom_data)
{
struct fd_lookup_st *curr;
curr = ctx->fds;
while (curr != NULL) {
if (curr->del) {
/* This one has been marked deleted so do nothing */
curr = curr->next;
continue;
}
if (curr->key == key) {
*fd = curr->fd;
*custom_data = curr->custom_data;
return 1;
}
curr = curr->next;
}
return 0;
}
int ASYNC_WAIT_CTX_get_all_fds(ASYNC_WAIT_CTX *ctx, OSSL_ASYNC_FD *fd,
size_t *numfds)
{
struct fd_lookup_st *curr;
curr = ctx->fds;
*numfds = 0;
while (curr != NULL) {
if (curr->del) {
/* This one has been marked deleted so do nothing */
curr = curr->next;
continue;
}
if (fd != NULL) {
*fd = curr->fd;
fd++;
}
(*numfds)++;
curr = curr->next;
}
return 1;
}
int ASYNC_WAIT_CTX_get_changed_fds(ASYNC_WAIT_CTX *ctx, OSSL_ASYNC_FD *addfd,
size_t *numaddfds, OSSL_ASYNC_FD *delfd,
size_t *numdelfds)
{
struct fd_lookup_st *curr;
*numaddfds = ctx->numadd;
*numdelfds = ctx->numdel;
if (addfd == NULL && delfd == NULL)
return 1;
curr = ctx->fds;
while (curr != NULL) {
/* We ignore fds that have been marked as both added and deleted */
if (curr->del && !curr->add && (delfd != NULL)) {
*delfd = curr->fd;
delfd++;
}
if (curr->add && !curr->del && (addfd != NULL)) {
*addfd = curr->fd;
addfd++;
}
curr = curr->next;
}
return 1;
}
int ASYNC_WAIT_CTX_clear_fd(ASYNC_WAIT_CTX *ctx, const void *key)
{
struct fd_lookup_st *curr, *prev;
curr = ctx->fds;
prev = NULL;
while (curr != NULL) {
if (curr->del == 1) {
/* This one has been marked deleted already so do nothing */
prev = curr;
curr = curr->next;
continue;
}
if (curr->key == key) {
/* If fd has just been added, remove it from the list */
if (curr->add == 1) {
if (ctx->fds == curr) {
ctx->fds = curr->next;
} else {
prev->next = curr->next;
}
/* It is responsibility of the caller to cleanup before calling
* ASYNC_WAIT_CTX_clear_fd
*/
OPENSSL_free(curr);
ctx->numadd--;
return 1;
}
/*
* Mark it as deleted. We don't call cleanup if explicitly asked
* to clear an fd. We assume the caller is going to do that (if
* appropriate).
*/
curr->del = 1;
ctx->numdel++;
return 1;
}
prev = curr;
curr = curr->next;
}
return 0;
}
void async_wait_ctx_reset_counts(ASYNC_WAIT_CTX *ctx)
{
struct fd_lookup_st *curr, *prev = NULL;
ctx->numadd = 0;
ctx->numdel = 0;
curr = ctx->fds;
while (curr != NULL) {
if (curr->del) {
if (prev == NULL)
ctx->fds = curr->next;
else
prev->next = curr->next;
OPENSSL_free(curr);
if (prev == NULL)
curr = ctx->fds;
else
curr = prev->next;
continue;
}
if (curr->add) {
curr->add = 0;
}
prev = curr;
curr = curr->next;
}
}
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