7e1488494e
In situations where the driver does background scanning and sends a steady stream of scan results, wpa_supplicant would continually reschedule the scan. This resulted in specific SSID scans never happening for a hidden AP, and the supplicant never connecting to the AP because it never got found. Instead, if there's an already scheduled scan, and a request comes in to reschedule it, and there are enabled scan_ssid=1 network blocks, let the scan happen anyway so the hidden SSID has a chance to be found.
410 lines
8 KiB
C
410 lines
8 KiB
C
/*
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* Event loop - empty template (basic structure, but no OS specific operations)
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* Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#include "includes.h"
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#include "common.h"
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#include "eloop.h"
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struct eloop_sock {
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int sock;
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void *eloop_data;
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void *user_data;
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void (*handler)(int sock, void *eloop_ctx, void *sock_ctx);
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};
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struct eloop_timeout {
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struct os_time time;
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void *eloop_data;
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void *user_data;
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void (*handler)(void *eloop_ctx, void *sock_ctx);
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struct eloop_timeout *next;
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};
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struct eloop_signal {
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int sig;
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void *user_data;
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void (*handler)(int sig, void *eloop_ctx, void *signal_ctx);
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int signaled;
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};
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struct eloop_data {
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void *user_data;
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int max_sock, reader_count;
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struct eloop_sock *readers;
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struct eloop_timeout *timeout;
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int signal_count;
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struct eloop_signal *signals;
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int signaled;
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int pending_terminate;
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int terminate;
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int reader_table_changed;
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};
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static struct eloop_data eloop;
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int eloop_init(void *user_data)
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{
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memset(&eloop, 0, sizeof(eloop));
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eloop.user_data = user_data;
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return 0;
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}
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int eloop_register_read_sock(int sock,
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void (*handler)(int sock, void *eloop_ctx,
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void *sock_ctx),
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void *eloop_data, void *user_data)
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{
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struct eloop_sock *tmp;
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tmp = (struct eloop_sock *)
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realloc(eloop.readers,
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(eloop.reader_count + 1) * sizeof(struct eloop_sock));
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if (tmp == NULL)
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return -1;
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tmp[eloop.reader_count].sock = sock;
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tmp[eloop.reader_count].eloop_data = eloop_data;
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tmp[eloop.reader_count].user_data = user_data;
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tmp[eloop.reader_count].handler = handler;
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eloop.reader_count++;
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eloop.readers = tmp;
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if (sock > eloop.max_sock)
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eloop.max_sock = sock;
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eloop.reader_table_changed = 1;
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return 0;
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}
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void eloop_unregister_read_sock(int sock)
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{
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int i;
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if (eloop.readers == NULL || eloop.reader_count == 0)
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return;
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for (i = 0; i < eloop.reader_count; i++) {
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if (eloop.readers[i].sock == sock)
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break;
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}
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if (i == eloop.reader_count)
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return;
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if (i != eloop.reader_count - 1) {
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memmove(&eloop.readers[i], &eloop.readers[i + 1],
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(eloop.reader_count - i - 1) *
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sizeof(struct eloop_sock));
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}
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eloop.reader_count--;
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eloop.reader_table_changed = 1;
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}
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int eloop_register_timeout(unsigned int secs, unsigned int usecs,
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void (*handler)(void *eloop_ctx, void *timeout_ctx),
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void *eloop_data, void *user_data)
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{
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struct eloop_timeout *timeout, *tmp, *prev;
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timeout = (struct eloop_timeout *) malloc(sizeof(*timeout));
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if (timeout == NULL)
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return -1;
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os_get_time(&timeout->time);
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timeout->time.sec += secs;
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timeout->time.usec += usecs;
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while (timeout->time.usec >= 1000000) {
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timeout->time.sec++;
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timeout->time.usec -= 1000000;
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}
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timeout->eloop_data = eloop_data;
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timeout->user_data = user_data;
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timeout->handler = handler;
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timeout->next = NULL;
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if (eloop.timeout == NULL) {
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eloop.timeout = timeout;
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return 0;
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}
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prev = NULL;
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tmp = eloop.timeout;
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while (tmp != NULL) {
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if (os_time_before(&timeout->time, &tmp->time))
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break;
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prev = tmp;
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tmp = tmp->next;
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}
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if (prev == NULL) {
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timeout->next = eloop.timeout;
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eloop.timeout = timeout;
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} else {
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timeout->next = prev->next;
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prev->next = timeout;
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}
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return 0;
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}
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int eloop_cancel_timeout(void (*handler)(void *eloop_ctx, void *sock_ctx),
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void *eloop_data, void *user_data)
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{
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struct eloop_timeout *timeout, *prev, *next;
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int removed = 0;
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prev = NULL;
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timeout = eloop.timeout;
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while (timeout != NULL) {
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next = timeout->next;
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if (timeout->handler == handler &&
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(timeout->eloop_data == eloop_data ||
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eloop_data == ELOOP_ALL_CTX) &&
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(timeout->user_data == user_data ||
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user_data == ELOOP_ALL_CTX)) {
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if (prev == NULL)
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eloop.timeout = next;
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else
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prev->next = next;
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free(timeout);
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removed++;
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} else
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prev = timeout;
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timeout = next;
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}
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return removed;
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}
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int eloop_is_timeout_registered(void (*handler)(void *eloop_ctx,
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void *timeout_ctx),
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void *eloop_data, void *user_data)
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{
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struct eloop_timeout *tmp;
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tmp = eloop.timeout;
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while (tmp != NULL) {
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if (tmp->handler == handler &&
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tmp->eloop_data == eloop_data &&
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tmp->user_data == user_data)
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return 1;
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tmp = tmp->next;
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}
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return 0;
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}
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/* TODO: replace with suitable signal handler */
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#if 0
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static void eloop_handle_signal(int sig)
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{
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int i;
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eloop.signaled++;
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for (i = 0; i < eloop.signal_count; i++) {
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if (eloop.signals[i].sig == sig) {
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eloop.signals[i].signaled++;
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break;
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}
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}
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}
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#endif
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static void eloop_process_pending_signals(void)
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{
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int i;
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if (eloop.signaled == 0)
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return;
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eloop.signaled = 0;
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if (eloop.pending_terminate) {
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eloop.pending_terminate = 0;
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}
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for (i = 0; i < eloop.signal_count; i++) {
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if (eloop.signals[i].signaled) {
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eloop.signals[i].signaled = 0;
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eloop.signals[i].handler(eloop.signals[i].sig,
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eloop.user_data,
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eloop.signals[i].user_data);
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}
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}
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}
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int eloop_register_signal(int sig,
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void (*handler)(int sig, void *eloop_ctx,
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void *signal_ctx),
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void *user_data)
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{
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struct eloop_signal *tmp;
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tmp = (struct eloop_signal *)
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realloc(eloop.signals,
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(eloop.signal_count + 1) *
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sizeof(struct eloop_signal));
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if (tmp == NULL)
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return -1;
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tmp[eloop.signal_count].sig = sig;
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tmp[eloop.signal_count].user_data = user_data;
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tmp[eloop.signal_count].handler = handler;
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tmp[eloop.signal_count].signaled = 0;
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eloop.signal_count++;
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eloop.signals = tmp;
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/* TODO: register signal handler */
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return 0;
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}
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int eloop_register_signal_terminate(void (*handler)(int sig, void *eloop_ctx,
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void *signal_ctx),
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void *user_data)
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{
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#if 0
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/* TODO: for example */
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int ret = eloop_register_signal(SIGINT, handler, user_data);
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if (ret == 0)
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ret = eloop_register_signal(SIGTERM, handler, user_data);
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return ret;
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#endif
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return 0;
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}
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int eloop_register_signal_reconfig(void (*handler)(int sig, void *eloop_ctx,
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void *signal_ctx),
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void *user_data)
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{
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#if 0
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/* TODO: for example */
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return eloop_register_signal(SIGHUP, handler, user_data);
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#endif
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return 0;
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}
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void eloop_run(void)
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{
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int i;
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struct os_time tv, now;
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while (!eloop.terminate &&
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(eloop.timeout || eloop.reader_count > 0)) {
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if (eloop.timeout) {
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os_get_time(&now);
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if (os_time_before(&now, &eloop.timeout->time))
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os_time_sub(&eloop.timeout->time, &now, &tv);
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else
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tv.sec = tv.usec = 0;
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}
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/*
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* TODO: wait for any event (read socket ready, timeout (tv),
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* signal
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*/
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os_sleep(1, 0); /* just a dummy wait for testing */
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eloop_process_pending_signals();
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/* check if some registered timeouts have occurred */
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if (eloop.timeout) {
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struct eloop_timeout *tmp;
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os_get_time(&now);
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if (!os_time_before(&now, &eloop.timeout->time)) {
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tmp = eloop.timeout;
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eloop.timeout = eloop.timeout->next;
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tmp->handler(tmp->eloop_data,
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tmp->user_data);
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free(tmp);
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}
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}
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eloop.reader_table_changed = 0;
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for (i = 0; i < eloop.reader_count; i++) {
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/*
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* TODO: call each handler that has pending data to
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* read
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*/
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if (0 /* TODO: eloop.readers[i].sock ready */) {
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eloop.readers[i].handler(
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eloop.readers[i].sock,
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eloop.readers[i].eloop_data,
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eloop.readers[i].user_data);
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if (eloop.reader_table_changed)
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break;
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}
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}
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}
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}
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void eloop_terminate(void)
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{
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eloop.terminate = 1;
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}
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void eloop_destroy(void)
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{
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struct eloop_timeout *timeout, *prev;
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timeout = eloop.timeout;
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while (timeout != NULL) {
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prev = timeout;
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timeout = timeout->next;
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free(prev);
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}
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free(eloop.readers);
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free(eloop.signals);
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}
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int eloop_terminated(void)
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{
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return eloop.terminate;
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}
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void eloop_wait_for_read_sock(int sock)
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{
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/*
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* TODO: wait for the file descriptor to have something available for
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* reading
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*/
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}
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void * eloop_get_user_data(void)
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{
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return eloop.user_data;
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}
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