#include "device.h"
#include "system.h"
+struct event_socket {
+ struct uloop_fd uloop;
+ struct nl_sock *sock;
+ struct nl_cb *cb;
+};
+
static int sock_ioctl = -1;
static struct nl_sock *sock_rtnl = NULL;
-static struct nl_sock *sock_rtnl_event = NULL;
-static void handler_rtnl_event(struct uloop_fd *u, unsigned int events);
static int cb_rtnl_event(struct nl_msg *msg, void *arg);
-static struct uloop_fd rtnl_event = {.cb = handler_rtnl_event};
-static struct nl_cb *nl_cb_rtnl_event;
+static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
+
+static void
+handler_nl_event(struct uloop_fd *u, unsigned int events)
+{
+ struct event_socket *ev = container_of(u, struct event_socket, uloop);
+ nl_recvmsgs(ev->sock, ev->cb);
+}
+
+static struct nl_sock *
+create_socket(int protocol, int groups)
+{
+ struct nl_sock *sock;
+
+ sock = nl_socket_alloc();
+ if (!sock)
+ return NULL;
+
+ if (groups)
+ nl_join_groups(sock, groups);
+
+ if (nl_connect(sock, protocol))
+ return NULL;
+
+ return sock;
+}
+
+static bool
+create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
+ uloop_fd_handler cb)
+{
+ ev->sock = create_socket(protocol, groups);
+ if (!ev->sock)
+ return false;
+
+ ev->uloop.fd = nl_socket_get_fd(ev->sock);
+ ev->uloop.cb = cb;
+ uloop_fd_add(&ev->uloop, ULOOP_READ | ULOOP_EDGE_TRIGGER);
+ return true;
+}
+
+static bool
+create_event_socket(struct event_socket *ev, int protocol,
+ int (*cb)(struct nl_msg *msg, void *arg))
+{
+ // Prepare socket for link events
+ ev->cb = nl_cb_alloc(NL_CB_DEFAULT);
+ if (!ev->cb)
+ return false;
+
+ nl_cb_set(ev->cb, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
+
+ return create_raw_event_socket(ev, protocol, 0, handler_nl_event);
+}
int system_init(void)
{
+ static struct event_socket rtnl_event;
+ static struct event_socket hotplug_event;
+
sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
fcntl(sock_ioctl, F_SETFD, fcntl(sock_ioctl, F_GETFD) | FD_CLOEXEC);
// Prepare socket for routing / address control
- sock_rtnl = nl_socket_alloc();
+ sock_rtnl = create_socket(NETLINK_ROUTE, 0);
if (!sock_rtnl)
return -1;
- if (nl_connect(sock_rtnl, NETLINK_ROUTE))
- goto error_free_sock;
+ if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
+ return -1;
- // Prepare socket for link events
- nl_cb_rtnl_event = nl_cb_alloc(NL_CB_DEFAULT);
- if (!nl_cb_rtnl_event)
- goto error_free_sock;
+ if (!create_raw_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT, 1,
+ handle_hotplug_event))
+ return -1;
- nl_cb_set(nl_cb_rtnl_event, NL_CB_VALID, NL_CB_CUSTOM,
- cb_rtnl_event, NULL);
+ // Receive network link events form kernel
+ nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
- sock_rtnl_event = nl_socket_alloc();
- if (!sock_rtnl_event)
- goto error_free_cb;
+ return 0;
+}
- if (nl_connect(sock_rtnl_event, NETLINK_ROUTE))
- goto error_free_event;
+static void system_set_sysctl(const char *path, const char *val)
+{
+ int fd;
- // Receive network link events form kernel
- nl_socket_add_membership(sock_rtnl_event, RTNLGRP_LINK);
+ fd = open(path, O_WRONLY);
+ if (fd < 0)
+ return;
- rtnl_event.fd = nl_socket_get_fd(sock_rtnl_event);
- uloop_fd_add(&rtnl_event, ULOOP_READ | ULOOP_EDGE_TRIGGER);
+ write(fd, val, strlen(val));
+ close(fd);
+}
- return 0;
+static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
+{
+ static char buf[256];
-error_free_event:
- nl_socket_free(sock_rtnl_event);
- sock_rtnl_event = NULL;
-error_free_cb:
- nl_cb_put(nl_cb_rtnl_event);
- nl_cb_rtnl_event = NULL;
-error_free_sock:
- nl_socket_free(sock_rtnl);
- sock_rtnl = NULL;
- return -1;
+ snprintf(buf, sizeof(buf), path, val);
+ system_set_sysctl(buf, val);
}
-// If socket is ready for reading parse netlink events
-static void handler_rtnl_event(struct uloop_fd *u, unsigned int events)
+static void system_set_disable_ipv6(struct device *dev, const char *val)
{
- nl_recvmsgs(sock_rtnl_event, nl_cb_rtnl_event);
+ system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
}
// Evaluate netlink messages
goto out;
dev->ifindex = ifi->ifi_index;
- device_set_present(dev, (nh->nlmsg_type == RTM_NEWLINK));
+ /* TODO: parse link status */
out:
return 0;
}
+static void
+handle_hotplug_msg(char *data, int size)
+{
+ const char *subsystem = NULL, *interface = NULL;
+ char *cur, *end, *sep;
+ struct device *dev;
+ int skip;
+ bool add;
+
+ if (!strncmp(data, "add@", 4))
+ add = true;
+ else if (!strncmp(data, "remove@", 7))
+ add = false;
+ else
+ return;
+
+ skip = strlen(data) + 1;
+ end = data + size;
+
+ for (cur = data + skip; cur < end; cur += skip) {
+ skip = strlen(cur) + 1;
+
+ sep = strchr(cur, '=');
+ if (!sep)
+ continue;
+
+ *sep = 0;
+ if (!strcmp(cur, "INTERFACE"))
+ interface = sep + 1;
+ else if (!strcmp(cur, "SUBSYSTEM")) {
+ subsystem = sep + 1;
+ if (strcmp(subsystem, "net") != 0)
+ return;
+ }
+ if (subsystem && interface)
+ goto found;
+ }
+ return;
+
+found:
+ dev = device_get(interface, false);
+ if (!dev)
+ return;
+
+ if (dev->type != &simple_device_type)
+ return;
+
+ device_set_present(dev, add);
+}
+
+static void
+handle_hotplug_event(struct uloop_fd *u, unsigned int events)
+{
+ struct event_socket *ev = container_of(u, struct event_socket, uloop);
+ struct sockaddr_nl nla;
+ unsigned char *buf = NULL;
+ int size;
+
+ while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
+ if (nla.nl_pid == 0)
+ handle_hotplug_msg((char *) buf, size);
+
+ free(buf);
+ }
+}
+
static int system_rtnl_call(struct nl_msg *msg)
{
int s = -(nl_send_auto_complete(sock_rtnl, msg)
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);
}
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
*/
void system_if_clear_state(struct device *dev)
{
- char buf[256];
+ static char buf[256];
char *bridge;
+ if (dev->external)
+ return;
+
dev->ifindex = system_if_resolve(dev);
if (!dev->ifindex)
return;
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
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);
return system_vlan(dev, -1);
}
-int system_if_up(struct device *dev)
+static void
+system_if_apply_settings(struct device *dev)
{
+ struct ifreq ifr;
+
+ memset(&ifr, 0, sizeof(ifr));
+ strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
+ if (dev->flags & DEV_OPT_MTU) {
+ ifr.ifr_mtu = dev->mtu;
+ ioctl(sock_ioctl, SIOCSIFMTU, &ifr);
+ }
+ if (dev->flags & DEV_OPT_TXQUEUELEN) {
+ ifr.ifr_qlen = dev->txqueuelen;
+ ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr);
+ }
+ if (dev->flags & DEV_OPT_MACADDR) {
+ memcpy(&ifr.ifr_hwaddr, dev->macaddr, sizeof(dev->macaddr));
+ ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr);
+ }
+
dev->ifindex = system_if_resolve(dev);
+}
+
+int system_if_up(struct device *dev)
+{
+ system_if_apply_settings(dev);
return system_if_flags(dev->ifname, IFF_UP, 0);
}
int system_if_check(struct device *dev)
{
- device_set_present(dev, (system_if_resolve(dev) >= 0));
+ device_set_present(dev, (system_if_resolve(dev) > 0));
return 0;
}
.ifa_index = dev->ifindex,
};
- struct nl_msg *msg = nlmsg_alloc_simple(cmd, 0);
+ struct nl_msg *msg;
+
+ dev = addr->device;
+ if (dev) {
+ if (!dev->ifindex)
+ return -1;
+
+ ifa.ifa_index = dev->ifindex;
+ }
+
+ msg = nlmsg_alloc_simple(cmd, 0);
if (!msg)
return -1;
int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
bool have_gw;
unsigned int flags = 0;
+ int ifindex = dev->ifindex;
if (alen == 4)
have_gw = !!route->nexthop.in.s_addr;
.rtm_scope = scope,
.rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
};
+ struct nl_msg *msg;
if (cmd == RTM_NEWROUTE)
flags |= NLM_F_CREATE | NLM_F_REPLACE;
- struct nl_msg *msg = nlmsg_alloc_simple(cmd, flags);
+ dev = route->device;
+ if (dev) {
+ if (!dev->ifindex)
+ return -1;
+
+ ifindex = dev->ifindex;
+ }
+
+ msg = nlmsg_alloc_simple(cmd, flags);
if (!msg)
return -1;
nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
if (route->flags & DEVADDR_DEVICE)
- nla_put_u32(msg, RTA_OIF, dev->ifindex);
+ nla_put_u32(msg, RTA_OIF, ifindex);
return system_rtnl_call(msg);
}