#include <string.h>
#include <fcntl.h>
#include <glob.h>
+#include <time.h>
#include <netlink/msg.h>
#include <netlink/attr.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 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);
}
*/
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;
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;
}
-int system_if_dump_stats(struct device *dev, struct blob_buf *b)
+struct device *
+system_if_get_parent(struct device *dev)
+{
+ char buf[64], *devname;
+ int ifindex, iflink, len;
+ FILE *f;
+
+ snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
+ f = fopen(buf, "r");
+ if (!f)
+ return NULL;
+
+ len = fread(buf, 1, sizeof(buf) - 1, f);
+ fclose(f);
+
+ if (len <= 0)
+ return NULL;
+
+ buf[len] = 0;
+ iflink = strtoul(buf, NULL, 0);
+ ifindex = system_if_resolve(dev);
+ if (!iflink || iflink == ifindex)
+ return NULL;
+
+ devname = if_indextoname(iflink, buf);
+ if (!devname)
+ return NULL;
+
+ return device_get(devname, true);
+}
+
+static bool
+read_string_file(int dir_fd, const char *file, char *buf, int len)
+{
+ bool ret = false;
+ char *c;
+ int fd;
+
+ fd = openat(dir_fd, file, O_RDONLY);
+ if (fd < 0)
+ return false;
+
+retry:
+ len = read(fd, buf, len - 1);
+ if (len < 0) {
+ if (errno == EINTR)
+ goto retry;
+ } else if (len > 0) {
+ buf[len] = 0;
+
+ c = strchr(buf, '\n');
+ if (c)
+ *c = 0;
+
+ ret = true;
+ }
+
+ close(fd);
+
+ return ret;
+}
+
+static bool
+read_int_file(int dir_fd, const char *file, int *val)
+{
+ char buf[64];
+ bool ret = false;
+
+ ret = read_string_file(dir_fd, file, buf, sizeof(buf));
+ if (ret)
+ *val = strtoul(buf, NULL, 0);
+
+ return ret;
+}
+
+int
+system_if_dump_info(struct device *dev, struct blob_buf *b)
+{
+ char buf[64];
+ int dir_fd, val = 0;
+
+ snprintf(buf, sizeof(buf), "/sys/class/net/%s", dev->ifname);
+ dir_fd = open(buf, O_DIRECTORY);
+
+ if (read_int_file(dir_fd, "carrier", &val))
+ blobmsg_add_u8(b, "link", !!val);
+ if (read_string_file(dir_fd, "address", buf, sizeof(buf)))
+ blobmsg_add_string(b, "macaddr", buf);
+
+ close(dir_fd);
+ return 0;
+}
+
+int
+system_if_dump_stats(struct device *dev, struct blob_buf *b)
{
const char *const counters[] = {
"collisions", "rx_frame_errors", "tx_compressed",
};
char buf[64];
int stats_dir;
- int i, fd, len;
+ int i, val = 0;
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);
- }
+ for (i = 0; i < ARRAY_SIZE(counters); i++)
+ if (read_int_file(stats_dir, counters[i], &val))
+ blobmsg_add_u32(b, counters[i], val);
close(stats_dir);
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);
}