#include <string.h>
#include <fcntl.h>
#include <glob.h>
+#include <time.h>
#include <netlink/msg.h>
#include <netlink/attr.h>
static struct nl_sock *sock_rtnl = NULL;
static int cb_rtnl_event(struct nl_msg *msg, void *arg);
+static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
static void
handler_nl_event(struct uloop_fd *u, unsigned int events)
}
static struct nl_sock *
-create_socket(int protocol)
+create_socket(int protocol, int groups)
{
struct nl_sock *sock;
if (!sock)
return NULL;
+ if (groups)
+ nl_join_groups(sock, groups);
+
if (nl_connect(sock, protocol))
return NULL;
}
static bool
-create_raw_event_socket(struct event_socket *ev, int protocol,
+create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
uloop_fd_handler cb)
{
- ev->sock = create_socket(protocol);
+ ev->sock = create_socket(protocol, groups);
if (!ev->sock)
return false;
ev->uloop.fd = nl_socket_get_fd(ev->sock);
- ev->uloop.cb = handler_nl_event;
+ ev->uloop.cb = cb;
uloop_fd_add(&ev->uloop, ULOOP_READ | ULOOP_EDGE_TRIGGER);
return true;
}
nl_cb_set(ev->cb, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
- return create_raw_event_socket(ev, protocol, handler_nl_event);
+ 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 = create_socket(NETLINK_ROUTE);
+ sock_rtnl = create_socket(NETLINK_ROUTE, 0);
if (!sock_rtnl)
return -1;
if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
return -1;
+ if (!create_raw_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT, 1,
+ handle_hotplug_event))
+ return -1;
+
// Receive network link events form kernel
nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
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_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;
projects / project / netifd.git / blobdiff