X-Git-Url: https://git.archive.openwrt.org/?p=project%2Fnetifd.git;a=blobdiff_plain;f=system-linux.c;h=3d6230d841830a7cf1723dd5453d8d8d62169513;hp=bb834a2d6614a8f4f278c01683379da0ea619b90;hb=8c6361136d8c976407b03252b6cfadecb441b37a;hpb=ca3f00d45e72c4b28b2ce39afc9543fa2f225020

diff --git a/system-linux.c b/system-linux.c
index bb834a2..3d6230d 100644
--- a/system-linux.c
+++ b/system-linux.c
@@ -87,6 +87,31 @@ static void handler_rtnl_event(struct uloop_fd *u, unsigned int events)
 	nl_recvmsgs(sock_rtnl_event, nl_cb_rtnl_event);
 }
 
+static void system_set_sysctl(const char *path, const char *val)
+{
+	int fd;
+
+	fd = open(path, O_WRONLY);
+	if (fd < 0)
+		return;
+
+	write(fd, val, strlen(val));
+	close(fd);
+}
+
+static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
+{
+	char buf[256];
+
+	snprintf(buf, sizeof(buf), path, val);
+	system_set_sysctl(buf, val);
+}
+
+static void system_set_disable_ipv6(struct device *dev, const char *val)
+{
+	system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
+}
+
 // Evaluate netlink messages
 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
 {
@@ -138,11 +163,13 @@ static int system_bridge_if(const char *bridge, struct device *dev, int cmd, voi
 
 int system_bridge_addif(struct device *bridge, struct device *dev)
 {
+	system_set_disable_ipv6(dev, "1");
 	return system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
 }
 
 int system_bridge_delif(struct device *bridge, struct device *dev)
 {
+	system_set_disable_ipv6(dev, "0");
 	return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
 }
 
@@ -202,6 +229,139 @@ static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
 	return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
 }
 
+struct clear_data {
+	struct nl_msg *msg;
+	struct device *dev;
+	int type;
+	int size;
+	int af;
+};
+
+
+static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
+{
+	struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
+
+	return ifa->ifa_index == ifindex;
+}
+
+static bool check_route(struct nlmsghdr *hdr, int ifindex)
+{
+	struct nlattr *tb[__RTA_MAX];
+
+	nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
+	if (!tb[RTA_OIF])
+		return false;
+
+	return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
+}
+
+static int cb_clear_event(struct nl_msg *msg, void *arg)
+{
+	struct clear_data *clr = arg;
+	struct nlmsghdr *hdr = nlmsg_hdr(msg);
+	bool (*cb)(struct nlmsghdr *, int ifindex);
+	int type;
+
+	switch(clr->type) {
+	case RTM_GETADDR:
+		type = RTM_DELADDR;
+		if (hdr->nlmsg_type != RTM_NEWADDR)
+			return NL_SKIP;
+
+		cb = check_ifaddr;
+		break;
+	case RTM_GETROUTE:
+		type = RTM_DELROUTE;
+		if (hdr->nlmsg_type != RTM_NEWROUTE)
+			return NL_SKIP;
+
+		cb = check_route;
+		break;
+	default:
+		return NL_SKIP;
+	}
+
+	if (!cb(hdr, clr->dev->ifindex))
+		return NL_SKIP;
+
+	D(SYSTEM, "Remove %s from device %s\n",
+	  type == RTM_DELADDR ? "an address" : "a route",
+	  clr->dev->ifname);
+	memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
+	hdr = nlmsg_hdr(clr->msg);
+	hdr->nlmsg_type = type;
+	hdr->nlmsg_flags = NLM_F_REQUEST;
+
+	if (!nl_send_auto_complete(sock_rtnl, clr->msg))
+		nl_wait_for_ack(sock_rtnl);
+
+	return NL_SKIP;
+}
+
+static int
+cb_finish_event(struct nl_msg *msg, void *arg)
+{
+	int *pending = arg;
+	*pending = 0;
+	return NL_STOP;
+}
+
+static int
+error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
+{
+	int *pending = arg;
+	*pending = err->error;
+	return NL_STOP;
+}
+
+static void
+system_if_clear_entries(struct device *dev, int type, int af)
+{
+	struct clear_data clr;
+	struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
+	struct rtmsg rtm = {
+		.rtm_family = af,
+		.rtm_flags = RTM_F_CLONED,
+	};
+	int flags = NLM_F_DUMP;
+	int pending = 1;
+
+	clr.af = af;
+	clr.dev = dev;
+	clr.type = type;
+	switch (type) {
+	case RTM_GETADDR:
+		clr.size = sizeof(struct rtgenmsg);
+		break;
+	case RTM_GETROUTE:
+		clr.size = sizeof(struct rtmsg);
+		break;
+	default:
+		return;
+	}
+
+	if (!cb)
+		return;
+
+	clr.msg = nlmsg_alloc_simple(type, flags);
+	if (!clr.msg)
+		goto out;
+
+	nlmsg_append(clr.msg, &rtm, clr.size, 0);
+	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
+	nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
+	nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
+
+	nl_send_auto_complete(sock_rtnl, clr.msg);
+	while (pending > 0)
+		nl_recvmsgs(sock_rtnl, cb);
+
+	nlmsg_free(clr.msg);
+out:
+	nl_cb_put(cb);
+}
+
 /*
  * Clear bridge (membership) state and bring down device
  */
@@ -227,6 +387,12 @@ void system_if_clear_state(struct device *dev)
 		D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
 		system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
 	}
+
+	system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
+	system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
+	system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
+	system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
+	system_set_disable_ipv6(dev, "0");
 }
 
 static inline unsigned long
@@ -250,6 +416,9 @@ int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
 	args[1] = sec_to_jiffies(cfg->forward_delay);
 	system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
 
+	system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
+		bridge->ifname, cfg->igmp_snoop ? "1" : "0");
+
 	if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
 		args[0] = BRCTL_SET_AGEING_TIME;
 		args[1] = sec_to_jiffies(cfg->ageing_time);