dhcpcd: Update to Version 5.2.10

Change-Id: I949331c7aad91b125decd51da4041983d3a352bc
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>

1 files changed, 208 insertions, 0 deletions

diff --git a/control.c b/control.c
new file mode 100644
index 0000000..24fb354
--- /dev/null
+++ b/control.c
@@ -0,0 +1,208 @@
+/* 
+ * dhcpcd - DHCP client daemon
+ * Copyright (c) 2006-2009 Roy Marples <roy@marples.name>
+ * All rights reserved
+
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <linux/socket.h>
+#include <sys/stat.h>
+#include <sys/un.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "config.h"
+#include "common.h"
+#include "dhcpcd.h"
+#include "control.h"
+#include "eloop.h"
+
+static int fd = -1;
+static char buffer[1024];
+static char *argvp[255];
+
+struct sockaddr_un sun;
+struct fd_list *fds = NULL;
+
+static void
+remove_control_data(void *arg)
+{
+	struct fd_list *l, *last = NULL;
+
+	for (l = fds; l != NULL; l = l->next) {
+		if (l == arg) {
+			close(l->fd);
+			delete_event(l->fd);
+			if (last == NULL)
+				fds = l->next;
+			else
+				last->next = l->next;
+			free(l);
+			break;
+		}
+		last = l;
+	}
+}
+
+static void
+handle_control_data(void *arg)
+{
+	struct fd_list *l = arg;
+	ssize_t bytes;
+	int argc;
+	char *e, *p;
+	char **ap;
+
+	bytes = read(l->fd, buffer, sizeof(buffer) - 1);
+	if (bytes == -1 || bytes == 0) {
+		remove_control_data(l);
+		return;
+	}
+	buffer[bytes] = '\0';
+	p = buffer;
+	e = buffer + bytes;
+	argc = 0;
+	ap = argvp;
+	while (p < e && (size_t)argc < sizeof(argvp)) {
+		argc++;
+		*ap++ = p;
+		p += strlen(p) + 1;
+	}
+	handle_args(l, argc, argvp);
+}
+
+/* ARGSUSED */
+static void
+handle_control(_unused void *arg)
+{
+	struct sockaddr_un run;
+	socklen_t len;
+	struct fd_list *l;
+	int f;
+
+	len = sizeof(run);
+	if ((f = accept(fd, (struct sockaddr *)&run, &len)) == -1)
+		return;
+	l = xmalloc(sizeof(*l));
+	l->fd = f;
+	l->listener = 0;
+	l->next = fds;
+	fds = l;
+	add_event(l->fd, handle_control_data, l);
+}
+
+static int
+make_sock(void)
+{
+	if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
+		return -1;
+	memset(&sun, 0, sizeof(sun));
+	sun.sun_family = AF_UNIX;
+	strlcpy(sun.sun_path, CONTROLSOCKET, sizeof(sun.sun_path));
+	return sizeof(sun.sun_family) + strlen(sun.sun_path) + 1;
+}
+
+int
+start_control(void)
+{
+	int len;
+
+	if ((len = make_sock()) == -1)
+		return -1;
+	unlink(CONTROLSOCKET);
+	if (bind(fd, (struct sockaddr *)&sun, len) == -1 ||
+	    chmod(CONTROLSOCKET,
+		S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP) == -1 ||
+	    set_cloexec(fd) == -1 ||
+	    set_nonblock(fd) == -1 ||
+	    listen(fd, sizeof(fds)) == -1)
+	{
+		close(fd);
+		return -1;
+	}
+	add_event(fd, handle_control, NULL);
+	return fd;
+}
+
+int
+stop_control(void)
+{
+	int retval = 0;
+	struct fd_list *l, *ll;
+
+	delete_event(fd);
+	if (shutdown(fd, SHUT_RDWR) == -1)
+		retval = 1;
+	fd = -1;
+	if (unlink(CONTROLSOCKET) == -1)
+		retval = -1;
+
+	l = fds;
+	while (l != NULL) {
+		ll = l->next;
+		delete_event(l->fd);
+		shutdown(l->fd, SHUT_RDWR);
+		free(l);
+		l = ll;
+	}
+
+	return retval;
+}
+
+int
+open_control(void)
+{
+	int len;
+
+	if ((len = make_sock()) == -1)
+		return -1;
+	return connect(fd, (struct sockaddr *)&sun, len);
+}
+
+int
+send_control(int argc, char * const *argv)
+{
+	char *p = buffer;
+	int i;
+	size_t len;
+
+	if (argc > 255) {
+		errno = ENOBUFS;
+		return -1;
+	}
+	for (i = 0; i < argc; i++) {
+		len = strlen(argv[i]) + 1;
+		if ((p - buffer) + len > sizeof(buffer)) {
+			errno = ENOBUFS;
+			return -1;
+		}
+		memcpy(p, argv[i], len);
+		p += len;
+	}
+	return write(fd, buffer, p - buffer);
+}