+#define _GNU_SOURCE
+
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
+#include <sys/syscall.h>
#include <linux/rtnetlink.h>
#include <linux/sockios.h>
#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
+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)
+{
+ struct nl_sock *sock;
+
+ sock = nl_socket_alloc();
+ if (!sock)
+ return NULL;
+
+ if (nl_connect(sock, protocol))
+ return NULL;
+
+ return sock;
+}
+
+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);
+
+ ev->sock = create_socket(protocol);
+ if (!ev->sock)
+ return false;
+
+ ev->uloop.fd = nl_socket_get_fd(ev->sock);
+ ev->uloop.cb = handler_nl_event;
+ uloop_fd_add(&ev->uloop, ULOOP_READ | ULOOP_EDGE_TRIGGER);
+ return true;
+}
int system_init(void)
{
+ static struct event_socket rtnl_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);
if (!sock_rtnl)
return -1;
- if (nl_connect(sock_rtnl, NETLINK_ROUTE))
- goto error_free_sock;
-
- // 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_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_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
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);
}
return 0;
}
+int system_if_dump_stats(struct device *dev, struct blob_buf *b)
+{
+ const char *const counters[] = {
+ "collisions", "rx_frame_errors", "tx_compressed",
+ "multicast", "rx_length_errors", "tx_dropped",
+ "rx_bytes", "rx_missed_errors", "tx_errors",
+ "rx_compressed", "rx_over_errors", "tx_fifo_errors",
+ "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
+ "rx_dropped", "tx_aborted_errors", "tx_packets",
+ "rx_errors", "tx_bytes", "tx_window_errors",
+ "rx_fifo_errors", "tx_carrier_errors",
+ };
+ char buf[64];
+ int stats_dir;
+ int i, fd, len;
+
+ snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
+ stats_dir = open(buf, O_DIRECTORY);
+ if (stats_dir < 0)
+ return -1;
+
+ for (i = 0; i < ARRAY_SIZE(counters); i++) {
+ fd = openat(stats_dir, counters[i], O_RDONLY);
+ if (fd < 0)
+ continue;
+
+retry:
+ len = read(fd, buf, sizeof(buf));
+ if (len < 0) {
+ if (errno == EINTR)
+ goto retry;
+ continue;
+ }
+
+ buf[len] = 0;
+ blobmsg_add_u32(b, counters[i], strtoul(buf, NULL, 0));
+ close(fd);
+ }
+
+ close(stats_dir);
+ return 0;
+}
+
static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
{
int alen = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
.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;
+
+ dev = route->device;
+ if (dev) {
+ if (!dev->ifindex)
+ return -1;
+
+ ifindex = dev->ifindex;
+ }
- struct nl_msg *msg = nlmsg_alloc_simple(cmd, 0);
+ 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);
}
{
return system_rt(dev, route, RTM_DELROUTE);
}
+
+int system_flush_routes(void)
+{
+ const char *names[] = {
+ "/proc/sys/net/ipv4/route/flush",
+ "/proc/sys/net/ipv6/route/flush"
+ };
+ int fd, i;
+
+ for (i = 0; i < ARRAY_SIZE(names); i++) {
+ fd = open(names[i], O_WRONLY);
+ if (fd < 0)
+ continue;
+
+ write(fd, "-1", 2);
+ close(fd);
+ }
+ return 0;
+}
+
+time_t system_get_rtime(void)
+{
+ struct timespec ts;
+ struct timeval tv;
+
+ if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
+ return ts.tv_sec;
+
+ if (gettimeofday(&tv, NULL) == 0)
+ return tv.tv_sec;
+
+ return 0;
+}
projects / project / netifd.git / blobdiff