device: bridge: implement initial bridge setup

src/device-bridge.c

@@ -1,14 +1,128 @@
-#include "device.h"
+#include "device-common.h"
+#include "netlink.h"
+#include "util.h"
 
-#include <stdio.h>
+#include <string.h>
+
+#include <net/if.h>
+
+#include <linux/if.h>
+#include <linux/if_link.h>
+#include <linux/rtnetlink.h>
+
+static device_type_t device_type_bridge;
+
+typedef struct _device_bridge {
+	device_t device;
+	device_common_t common;
+} device_bridge_t;
+
+static void bridge_free(device_t *dev) {
+	device_bridge_t *iface = container_of(dev, device_bridge_t, device);
+
+	VECTOR_FREE(iface->common.addrs);
+	free(NODE_NAME(dev));
+	free(iface);
+}
 
 static device_t * bridge_process_config(const char *name, struct json_object *config) {
-	printf("Bridge: %s\n", name);
+	device_bridge_t *iface = calloc(1, sizeof(*iface));
+	if (!iface)
+		return NULL;
+
+	device_t *dev = &iface->device;
+	dev->type = &device_type_bridge;
+
+	NODE_NAME(dev) = strdup(name);
+	if (!NODE_NAME(dev)) {
+		free(iface);
 		return NULL;
 	}
 
-device_type_t device_type_bridge = {
+	if (!device_common_process_config(&iface->common, config))
+		goto err;
+
+	return dev;
+
+err:
+	bridge_free(dev);
+	return NULL;
+}
+
+static bool bridge_nl_create(device_bridge_t *bridge) {
+	char buf[MNL_SOCKET_BUFFER_SIZE];
+
+	struct mnl_socket *nl = nl_socket();
+
+	struct nlmsghdr *nlh = mnl_nlmsg_put_header(buf);
+	nlh->nlmsg_type	= RTM_NEWLINK;
+	nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | NLM_F_CREATE;
+	int seq = nlh->nlmsg_seq = nl_seq();
+
+	struct ifinfomsg *ifi = mnl_nlmsg_put_extra_header(nlh, sizeof(*ifi));
+	ifi->ifi_family = AF_UNSPEC;
+
+	mnl_attr_put_str(nlh, IFLA_IFNAME, NODE_NAME(&bridge->device));
+
+	struct nlattr *linkinfo = mnl_attr_nest_start(nlh, IFLA_LINKINFO);
+	mnl_attr_put_str(nlh, IFLA_INFO_KIND, "bridge");
+	mnl_attr_nest_end(nlh, linkinfo);
+
+	if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
+		perror("mnl_socket_sendto");
+		return false;
+	}
+
+	int ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+	if (ret == -1) {
+		perror("mnl_socket_recvfrom");
+		return false;
+	}
+
+	ret = mnl_cb_run(buf, ret, seq, mnl_socket_get_portid(nl), NULL, NULL);
+	if (ret == -1) {
+		perror("mnl_cb_run");
+		return false;
+	}
+
+	return true;
+}
+
+static void bridge_init(device_t *dev) {
+	device_bridge_t *bridge = container_of(dev, device_bridge_t, device);
+
+	if (!bridge_nl_create(bridge))
+		return;
+
+	unsigned ifindex = if_nametoindex(NODE_NAME(dev));
+	if (!ifindex)
+		return;
+
+	device_common_init(&bridge->common, ifindex);
+}
+
+static void bridge_update(device_t *dev) {
+}
+
+static void bridge_release(device_t *dev) {
+	/*
+	device_bridge_t *bridge = container_of(dev, device_bridge_t, device);
+
+	unsigned ifindex = if_nametoindex(NODE_NAME(dev));
+	if (!ifindex)
+		return;
+
+	device_common_release(&bridge->common, ifindex);
+	*/
+}
+
+static device_type_t device_type_bridge = {
 	.process_config = bridge_process_config,
+	.free = bridge_free,
+
+	.init = bridge_init,
+	.update = bridge_update,
+	.release = bridge_release,
 };
 
 __attribute__((constructor))