Stripped down import of wpa_supplicant v0.3.8

1 files changed, 380 insertions, 0 deletions

diff --git a/contrib/wpa_supplicant/eloop.c b/contrib/wpa_supplicant/eloop.c
new file mode 100644
index 0000000..6071508
--- /dev/null
+++ b/contrib/wpa_supplicant/eloop.c
@@ -0,0 +1,380 @@
+/*
+ * Event loop
+ * Copyright (c) 2002-2005, Jouni Malinen <jkmaline@cc.hut.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <errno.h>
+#include <signal.h>
+
+#ifdef CONFIG_NATIVE_WINDOWS
+#include "common.h"
+#endif /* CONFIG_NATIVE_WINDOWS */
+
+#include "eloop.h"
+
+
+struct eloop_sock {
+	int sock;
+	void *eloop_data;
+	void *user_data;
+	void (*handler)(int sock, void *eloop_ctx, void *sock_ctx);
+};
+
+struct eloop_timeout {
+	struct timeval time;
+	void *eloop_data;
+	void *user_data;
+	void (*handler)(void *eloop_ctx, void *sock_ctx);
+	struct eloop_timeout *next;
+};
+
+struct eloop_signal {
+	int sig;
+	void *user_data;
+	void (*handler)(int sig, void *eloop_ctx, void *signal_ctx);
+	int signaled;
+};
+
+struct eloop_data {
+	void *user_data;
+
+	int max_sock, reader_count;
+	struct eloop_sock *readers;
+
+	struct eloop_timeout *timeout;
+
+	int signal_count;
+	struct eloop_signal *signals;
+	int signaled;
+	int pending_terminate;
+
+	int terminate;
+};
+
+static struct eloop_data eloop;
+
+
+void eloop_init(void *user_data)
+{
+	memset(&eloop, 0, sizeof(eloop));
+	eloop.user_data = user_data;
+}
+
+
+int eloop_register_read_sock(int sock,
+			     void (*handler)(int sock, void *eloop_ctx,
+					     void *sock_ctx),
+			     void *eloop_data, void *user_data)
+{
+	struct eloop_sock *tmp;
+
+	tmp = (struct eloop_sock *)
+		realloc(eloop.readers,
+			(eloop.reader_count + 1) * sizeof(struct eloop_sock));
+	if (tmp == NULL)
+		return -1;
+
+	tmp[eloop.reader_count].sock = sock;
+	tmp[eloop.reader_count].eloop_data = eloop_data;
+	tmp[eloop.reader_count].user_data = user_data;
+	tmp[eloop.reader_count].handler = handler;
+	eloop.reader_count++;
+	eloop.readers = tmp;
+	if (sock > eloop.max_sock)
+		eloop.max_sock = sock;
+
+	return 0;
+}
+
+
+void eloop_unregister_read_sock(int sock)
+{
+	int i;
+
+	if (eloop.readers == NULL || eloop.reader_count == 0)
+		return;
+
+	for (i = 0; i < eloop.reader_count; i++) {
+		if (eloop.readers[i].sock == sock)
+			break;
+	}
+	if (i == eloop.reader_count)
+		return;
+	if (i != eloop.reader_count - 1) {
+		memmove(&eloop.readers[i], &eloop.readers[i + 1],
+			(eloop.reader_count - i - 1) *
+			sizeof(struct eloop_sock));
+	}
+	eloop.reader_count--;
+}
+
+
+int eloop_register_timeout(unsigned int secs, unsigned int usecs,
+			   void (*handler)(void *eloop_ctx, void *timeout_ctx),
+			   void *eloop_data, void *user_data)
+{
+	struct eloop_timeout *timeout, *tmp, *prev;
+
+	timeout = (struct eloop_timeout *) malloc(sizeof(*timeout));
+	if (timeout == NULL)
+		return -1;
+	gettimeofday(&timeout->time, NULL);
+	timeout->time.tv_sec += secs;
+	timeout->time.tv_usec += usecs;
+	while (timeout->time.tv_usec >= 1000000) {
+		timeout->time.tv_sec++;
+		timeout->time.tv_usec -= 1000000;
+	}
+	timeout->eloop_data = eloop_data;
+	timeout->user_data = user_data;
+	timeout->handler = handler;
+	timeout->next = NULL;
+
+	if (eloop.timeout == NULL) {
+		eloop.timeout = timeout;
+		return 0;
+	}
+
+	prev = NULL;
+	tmp = eloop.timeout;
+	while (tmp != NULL) {
+		if (timercmp(&timeout->time, &tmp->time, <))
+			break;
+		prev = tmp;
+		tmp = tmp->next;
+	}
+
+	if (prev == NULL) {
+		timeout->next = eloop.timeout;
+		eloop.timeout = timeout;
+	} else {
+		timeout->next = prev->next;
+		prev->next = timeout;
+	}
+
+	return 0;
+}
+
+
+int eloop_cancel_timeout(void (*handler)(void *eloop_ctx, void *sock_ctx),
+			 void *eloop_data, void *user_data)
+{
+	struct eloop_timeout *timeout, *prev, *next;
+	int removed = 0;
+
+	prev = NULL;
+	timeout = eloop.timeout;
+	while (timeout != NULL) {
+		next = timeout->next;
+
+		if (timeout->handler == handler &&
+		    (timeout->eloop_data == eloop_data ||
+		     eloop_data == ELOOP_ALL_CTX) &&
+		    (timeout->user_data == user_data ||
+		     user_data == ELOOP_ALL_CTX)) {
+			if (prev == NULL)
+				eloop.timeout = next;
+			else
+				prev->next = next;
+			free(timeout);
+			removed++;
+		} else
+			prev = timeout;
+
+		timeout = next;
+	}
+
+	return removed;
+}
+
+
+#ifndef CONFIG_NATIVE_WINDOWS
+static void eloop_handle_alarm(int sig)
+{
+	fprintf(stderr, "eloop: could not process SIGINT or SIGTERM in two "
+		"seconds. Looks like there\n"
+		"is a bug that ends up in a busy loop that "
+		"prevents clean shutdown.\n"
+		"Killing program forcefully.\n");
+	exit(1);
+}
+#endif /* CONFIG_NATIVE_WINDOWS */
+
+
+static void eloop_handle_signal(int sig)
+{
+	int i;
+
+#ifndef CONFIG_NATIVE_WINDOWS
+	if ((sig == SIGINT || sig == SIGTERM) && !eloop.pending_terminate) {
+		/* Use SIGALRM to break out from potential busy loops that
+		 * would not allow the program to be killed. */
+		eloop.pending_terminate = 1;
+		signal(SIGALRM, eloop_handle_alarm);
+		alarm(2);
+	}
+#endif /* CONFIG_NATIVE_WINDOWS */
+
+	eloop.signaled++;
+	for (i = 0; i < eloop.signal_count; i++) {
+		if (eloop.signals[i].sig == sig) {
+			eloop.signals[i].signaled++;
+			break;
+		}
+	}
+}
+
+
+static void eloop_process_pending_signals(void)
+{
+	int i;
+
+	if (eloop.signaled == 0)
+		return;
+	eloop.signaled = 0;
+
+	if (eloop.pending_terminate) {
+#ifndef CONFIG_NATIVE_WINDOWS
+		alarm(0);
+#endif /* CONFIG_NATIVE_WINDOWS */
+		eloop.pending_terminate = 0;
+	}
+
+	for (i = 0; i < eloop.signal_count; i++) {
+		if (eloop.signals[i].signaled) {
+			eloop.signals[i].signaled = 0;
+			eloop.signals[i].handler(eloop.signals[i].sig,
+						 eloop.user_data,
+						 eloop.signals[i].user_data);
+		}
+	}
+}
+
+
+int eloop_register_signal(int sig,
+			  void (*handler)(int sig, void *eloop_ctx,
+					  void *signal_ctx),
+			  void *user_data)
+{
+	struct eloop_signal *tmp;
+
+	tmp = (struct eloop_signal *)
+		realloc(eloop.signals,
+			(eloop.signal_count + 1) *
+			sizeof(struct eloop_signal));
+	if (tmp == NULL)
+		return -1;
+
+	tmp[eloop.signal_count].sig = sig;
+	tmp[eloop.signal_count].user_data = user_data;
+	tmp[eloop.signal_count].handler = handler;
+	tmp[eloop.signal_count].signaled = 0;
+	eloop.signal_count++;
+	eloop.signals = tmp;
+	signal(sig, eloop_handle_signal);
+
+	return 0;
+}
+
+
+void eloop_run(void)
+{
+	fd_set rfds;
+	int i, res;
+	struct timeval tv, now;
+
+	while (!eloop.terminate &&
+		(eloop.timeout || eloop.reader_count > 0)) {
+		if (eloop.timeout) {
+			gettimeofday(&now, NULL);
+			if (timercmp(&now, &eloop.timeout->time, <))
+				timersub(&eloop.timeout->time, &now, &tv);
+			else
+				tv.tv_sec = tv.tv_usec = 0;
+#if 0
+			printf("next timeout in %lu.%06lu sec\n",
+			       tv.tv_sec, tv.tv_usec);
+#endif
+		}
+
+		FD_ZERO(&rfds);
+		for (i = 0; i < eloop.reader_count; i++)
+			FD_SET(eloop.readers[i].sock, &rfds);
+		res = select(eloop.max_sock + 1, &rfds, NULL, NULL,
+			     eloop.timeout ? &tv : NULL);
+		if (res < 0 && errno != EINTR) {
+			perror("select");
+			return;
+		}
+		eloop_process_pending_signals();
+
+		/* check if some registered timeouts have occurred */
+		if (eloop.timeout) {
+			struct eloop_timeout *tmp;
+
+			gettimeofday(&now, NULL);
+			if (!timercmp(&now, &eloop.timeout->time, <)) {
+				tmp = eloop.timeout;
+				eloop.timeout = eloop.timeout->next;
+				tmp->handler(tmp->eloop_data,
+					     tmp->user_data);
+				free(tmp);
+			}
+
+		}
+
+		if (res <= 0)
+			continue;
+
+		for (i = 0; i < eloop.reader_count; i++) {
+			if (FD_ISSET(eloop.readers[i].sock, &rfds)) {
+				eloop.readers[i].handler(
+					eloop.readers[i].sock,
+					eloop.readers[i].eloop_data,
+					eloop.readers[i].user_data);
+			}
+		}
+	}
+}
+
+
+void eloop_terminate(void)
+{
+	eloop.terminate = 1;
+}
+
+
+void eloop_destroy(void)
+{
+	struct eloop_timeout *timeout, *prev;
+
+	timeout = eloop.timeout;
+	while (timeout != NULL) {
+		prev = timeout;
+		timeout = timeout->next;
+		free(prev);
+	}
+	free(eloop.readers);
+	free(eloop.signals);
+}
+
+
+int eloop_terminated(void)
+{
+	return eloop.terminate;
+}