first step forward to merge conntrackd and conntrack into the same building chain

1 files changed, 159 insertions, 0 deletions

diff --git a/src/local.c b/src/local.c
new file mode 100644
index 0000000..eef70ad
--- /dev/null
+++ b/src/local.c
@@ -0,0 +1,159 @@
+/*
+ * (C) 2006 by Pablo Neira Ayuso <pablo@netfilter.org>
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Description: UNIX sockets library
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#include <errno.h>
+#include "debug.h"
+
+#include "local.h"
+
+int local_server_create(struct local_conf *conf)
+{
+	int fd;
+	int len;
+	struct sockaddr_un local;
+
+	if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
+		debug("local_server_create:socket");
+		return -1;
+	}
+
+	if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &conf->reuseaddr, 
+				sizeof(conf->reuseaddr)) == -1) {
+		debug("local_server_create:setsockopt");
+		close(fd);
+		return -1;
+	}
+
+	local.sun_family = AF_UNIX;
+	strcpy(local.sun_path, conf->path);
+	len = strlen(local.sun_path) + sizeof(local.sun_family);
+	unlink(conf->path);
+
+	if (bind(fd, (struct sockaddr *) &local, len) == -1) {
+		debug("local_server_create:bind");
+		close(fd);
+		return -1;
+	}
+
+	if (listen(fd, conf->backlog) == -1) {
+		close(fd);
+		debug("local_server_create:listen");
+		return -1;
+	}
+
+	return fd;
+}
+
+void local_server_destroy(int fd)
+{
+	close(fd);
+}
+
+int do_local_server_step(int fd, void *data, 
+			 void (*process)(int fd, void *data))
+{
+	int rfd;
+	struct sockaddr_un local;
+	size_t sin_size = sizeof(struct sockaddr_un);
+	
+	if ((rfd = accept(fd, (struct sockaddr *)&local, &sin_size)) == -1) {
+		debug("do_local_server_step:accept");
+		return -1;
+	}
+
+	process(rfd, data);
+	close(rfd);
+
+	return 0;
+}
+
+int local_client_create(struct local_conf *conf)
+{
+	int len;
+	struct sockaddr_un local;
+	int fd;
+
+	if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
+		return -1;
+
+	local.sun_family = AF_UNIX;
+	strcpy(local.sun_path, conf->path);
+	len = strlen(local.sun_path) + sizeof(local.sun_family);
+
+	if (connect(fd, (struct sockaddr *) &local, len) == -1) {
+		close(fd);
+		debug("local_client_create: connect: ");
+		return -1;
+	}
+
+	return fd;
+}
+
+void local_client_destroy(int fd)
+{
+	close(fd);
+}
+
+int do_local_client_step(int fd, void (*process)(char *buf))
+{
+	int numbytes;
+	char buf[1024];
+
+	memset(buf, 0, sizeof(buf));
+	while ((numbytes = recv(fd, buf, sizeof(buf)-1, 0)) > 0) {
+		buf[sizeof(buf)-1] = '\0';
+		if (process)
+			process(buf);
+		memset(buf, 0, sizeof(buf));
+	}
+
+	return 0;
+}
+
+void local_step(char *buf)
+{
+	printf(buf);
+}
+
+int do_local_request(int request,
+		     struct local_conf *conf,
+		     void (*step)(char *buf))
+{
+	int fd, ret;
+
+	fd = local_client_create(conf);
+	if (fd == -1)
+		return -1;
+
+	ret = send(fd, &request, sizeof(int), 0);
+	if (ret == -1) {
+		debug("send:");
+		return -1;
+	}
+
+	do_local_client_step(fd, step);
+
+	local_client_destroy(fd);
+	
+	return 0;
+}