+/*
+ * netifd - network interface daemon
+ * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
#define _GNU_SOURCE
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>
+#include <net/if.h>
+#include <net/if_arp.h>
+
+#include <arpa/inet.h>
+#include <netinet/in.h>
+
#include <linux/rtnetlink.h>
#include <linux/sockios.h>
+#include <linux/ip.h>
#include <linux/if_vlan.h>
#include <linux/if_bridge.h>
+#include <linux/if_tunnel.h>
+#include <linux/ethtool.h>
#include <unistd.h>
#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);
-int system_init(void)
+static char dev_buf[256];
+
+static void
+handler_nl_event(struct uloop_fd *u, unsigned int events)
{
- sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
- fcntl(sock_ioctl, F_SETFD, fcntl(sock_ioctl, F_GETFD) | FD_CLOEXEC);
+ struct event_socket *ev = container_of(u, struct event_socket, uloop);
+ nl_recvmsgs(ev->sock, ev->cb);
+}
- // Prepare socket for routing / address control
- sock_rtnl = nl_socket_alloc();
- if (!sock_rtnl)
- return -1;
+static struct nl_sock *
+create_socket(int protocol, int groups)
+{
+ struct nl_sock *sock;
- if (nl_connect(sock_rtnl, NETLINK_ROUTE))
- goto error_free_sock;
+ sock = nl_socket_alloc();
+ if (!sock)
+ return NULL;
- // 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 (groups)
+ nl_join_groups(sock, groups);
- nl_cb_set(nl_cb_rtnl_event, NL_CB_VALID, NL_CB_CUSTOM,
- cb_rtnl_event, NULL);
+ if (nl_connect(sock, protocol))
+ return NULL;
- sock_rtnl_event = nl_socket_alloc();
- if (!sock_rtnl_event)
- goto error_free_cb;
+ return sock;
+}
- if (nl_connect(sock_rtnl_event, NETLINK_ROUTE))
- goto error_free_event;
+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;
- // Receive network link events form kernel
- nl_socket_add_membership(sock_rtnl_event, RTNLGRP_LINK);
+ 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;
+}
- rtnl_event.fd = nl_socket_get_fd(sock_rtnl_event);
- uloop_fd_add(&rtnl_event, ULOOP_READ | ULOOP_EDGE_TRIGGER);
+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;
- return 0;
+ nl_cb_set(ev->cb, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
-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;
+ return create_raw_event_socket(ev, protocol, 0, handler_nl_event);
}
-// If socket is ready for reading parse netlink events
-static void handler_rtnl_event(struct uloop_fd *u, unsigned int events)
+int system_init(void)
{
- nl_recvmsgs(sock_rtnl_event, nl_cb_rtnl_event);
+ 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, 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);
+
+ return 0;
}
static void system_set_sysctl(const char *path, const char *val)
close(fd);
}
-static void system_set_disable_ipv6(struct device *dev, const char *val)
+static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
{
- char buf[256];
+ snprintf(dev_buf, sizeof(dev_buf), path, device);
+ system_set_sysctl(dev_buf, val);
+}
- snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname);
- system_set_sysctl(buf, "0");
+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
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;
+
+ if (add && system_if_force_external(dev->ifname))
+ 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)
- || nl_wait_for_ack(sock_rtnl));
+ int ret;
+
+ ret = nl_send_auto_complete(sock_rtnl, msg);
nlmsg_free(msg);
- return s;
+
+ if (ret < 0)
+ return ret;
+
+ return nl_wait_for_ack(sock_rtnl);
}
int system_bridge_delbr(struct device *bridge)
static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
{
struct ifreq ifr;
+
+ memset(&ifr, 0, sizeof(ifr));
if (dev)
ifr.ifr_ifindex = dev->ifindex;
else
return ioctl(sock_ioctl, cmd, &ifr);
}
-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);
-}
-
static bool system_is_bridge(const char *name, char *buf, int buflen)
{
struct stat st;
return path + 1;
}
+int system_bridge_addif(struct device *bridge, struct device *dev)
+{
+ char *oldbr;
+
+ system_set_disable_ipv6(dev, "1");
+ oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
+ if (oldbr && !strcmp(oldbr, bridge->ifname))
+ return 0;
+
+ 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);
+}
+
static int system_if_resolve(struct device *dev)
{
struct ifreq ifr;
static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
{
struct ifreq ifr;
+
+ memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr);
ifr.ifr_flags |= add;
static bool check_route(struct nlmsghdr *hdr, int ifindex)
{
+ struct rtmsg *r = NLMSG_DATA(hdr);
struct nlattr *tb[__RTA_MAX];
+ if (r->rtm_protocol == RTPROT_KERNEL &&
+ r->rtm_family == AF_INET6)
+ return false;
+
nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
if (!tb[RTA_OIF])
return false;
*/
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;
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);
}
+static void
+system_if_get_settings(struct device *dev, struct device_settings *s)
+{
+ struct ifreq ifr;
+
+ memset(&ifr, 0, sizeof(ifr));
+ strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
+
+ if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
+ s->mtu = ifr.ifr_mtu;
+ s->flags |= DEV_OPT_MTU;
+ }
+
+ if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
+ s->txqueuelen = ifr.ifr_qlen;
+ s->flags |= DEV_OPT_TXQUEUELEN;
+ }
+
+ if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
+ memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
+ s->flags |= DEV_OPT_MACADDR;
+ }
+}
+
+void
+system_if_apply_settings(struct device *dev, struct device_settings *s)
+{
+ struct ifreq ifr;
+
+ memset(&ifr, 0, sizeof(ifr));
+ strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
+ if (s->flags & DEV_OPT_MTU) {
+ ifr.ifr_mtu = s->mtu;
+ if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
+ s->flags &= ~DEV_OPT_MTU;
+ }
+ if (s->flags & DEV_OPT_TXQUEUELEN) {
+ ifr.ifr_qlen = s->txqueuelen;
+ if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
+ s->flags &= ~DEV_OPT_TXQUEUELEN;
+ }
+ if ((s->flags & DEV_OPT_MACADDR) && !dev->external) {
+ ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
+ memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
+ if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
+ s->flags &= ~DEV_OPT_MACADDR;
+ }
+}
+
int system_if_up(struct device *dev)
{
+ system_if_get_settings(dev, &dev->orig_settings);
+ system_if_apply_settings(dev, &dev->settings);
dev->ifindex = system_if_resolve(dev);
return system_if_flags(dev->ifname, IFF_UP, 0);
}
int system_if_down(struct device *dev)
{
- return system_if_flags(dev->ifname, 0, IFF_UP);
+ int ret = system_if_flags(dev->ifname, 0, IFF_UP);
+ dev->orig_settings.flags &= dev->settings.flags;
+ system_if_apply_settings(dev, &dev->orig_settings);
+ return ret;
}
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;
+}
+
+/* Assume advertised flags == supported flags */
+static const struct {
+ uint32_t mask;
+ const char *name;
+} ethtool_link_modes[] = {
+ { ADVERTISED_10baseT_Half, "10H" },
+ { ADVERTISED_10baseT_Full, "10F" },
+ { ADVERTISED_100baseT_Half, "100H" },
+ { ADVERTISED_100baseT_Full, "100F" },
+ { ADVERTISED_1000baseT_Half, "1000H" },
+ { ADVERTISED_1000baseT_Full, "1000F" },
+};
+
+static void system_add_link_modes(struct blob_buf *b, __u32 mask)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
+ if (mask & ethtool_link_modes[i].mask)
+ blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
+ }
+}
+
+bool
+system_if_force_external(const char *ifname)
+{
+ char buf[64];
+ struct stat s;
+
+ snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
+ return stat(buf, &s) == 0;
+}
+
+int
+system_if_dump_info(struct device *dev, struct blob_buf *b)
+{
+ struct ethtool_cmd ecmd;
+ struct ifreq ifr;
+ char buf[64], *s;
+ void *c;
+ 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);
+
+ memset(&ecmd, 0, sizeof(ecmd));
+ memset(&ifr, 0, sizeof(ifr));
+ strcpy(ifr.ifr_name, dev->ifname);
+ ifr.ifr_data = (caddr_t) &ecmd;
+ ecmd.cmd = ETHTOOL_GSET;
+
+ if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
+ c = blobmsg_open_array(b, "link-advertising");
+ system_add_link_modes(b, ecmd.advertising);
+ blobmsg_close_array(b, c);
+
+ c = blobmsg_open_array(b, "link-supported");
+ system_add_link_modes(b, ecmd.supported);
+ blobmsg_close_array(b, c);
+
+ s = blobmsg_alloc_string_buffer(b, "speed", 8);
+ snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
+ ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
+ blobmsg_add_string_buffer(b);
+ }
+
+ 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;
static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
{
- int alen = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
+ bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
+ int alen = v4 ? 4 : 16;
struct ifaddrmsg ifa = {
.ifa_family = (alen == 4) ? AF_INET : AF_INET6,
.ifa_prefixlen = addr->mask,
.ifa_index = dev->ifindex,
};
- struct nl_msg *msg = nlmsg_alloc_simple(cmd, 0);
+ struct nl_msg *msg;
+
+ msg = nlmsg_alloc_simple(cmd, 0);
if (!msg)
return -1;
nlmsg_append(msg, &ifa, sizeof(ifa), 0);
nla_put(msg, IFA_LOCAL, alen, &addr->addr);
+ if (v4) {
+ if (addr->broadcast)
+ nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
+ if (addr->point_to_point)
+ nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
+ }
+
return system_rtnl_call(msg);
}
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_family = (alen == 4) ? AF_INET : AF_INET6,
.rtm_dst_len = route->mask,
.rtm_table = RT_TABLE_MAIN,
- .rtm_protocol = RTPROT_BOOT,
+ .rtm_protocol = (route->flags & DEVADDR_KERNEL) ? RTPROT_KERNEL : RTPROT_STATIC,
.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);
+ msg = nlmsg_alloc_simple(cmd, flags);
if (!msg)
return -1;
if (route->mask)
nla_put(msg, RTA_DST, alen, &route->addr);
+ if (route->metric > 0)
+ nla_put_u32(msg, RTA_PRIORITY, route->metric);
+
if (have_gw)
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 0;
}
+
+#ifndef IP_DF
+#define IP_DF 0x4000
+#endif
+
+static void tunnel_parm_init(struct ip_tunnel_parm *p)
+{
+ memset(p, 0, sizeof(*p));
+ p->iph.version = 4;
+ p->iph.ihl = 5;
+ p->iph.frag_off = htons(IP_DF);
+}
+
+static int tunnel_ioctl(const char *name, int cmd, void *p)
+{
+ struct ifreq ifr;
+
+ memset(&ifr, 0, sizeof(ifr));
+ strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
+ ifr.ifr_ifru.ifru_data = p;
+ return ioctl(sock_ioctl, cmd, &ifr);
+}
+
+int system_del_ip_tunnel(const char *name)
+{
+ struct ip_tunnel_parm p;
+
+ tunnel_parm_init(&p);
+ return tunnel_ioctl(name, SIOCDELTUNNEL, &p);
+}
+
+static int parse_ipaddr(struct blob_attr *attr, __be32 *addr)
+{
+ if (!attr)
+ return 1;
+
+ return inet_pton(AF_INET, blobmsg_data(attr), (void *) addr);
+}
+
+
+int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
+{
+ struct blob_attr *tb[__TUNNEL_ATTR_MAX];
+ struct blob_attr *cur;
+ struct ip_tunnel_parm p;
+ const char *base, *str;
+ bool is_sit;
+
+ system_del_ip_tunnel(name);
+
+ tunnel_parm_init(&p);
+
+ blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
+ blob_data(attr), blob_len(attr));
+
+ if (!(cur = tb[TUNNEL_ATTR_TYPE]))
+ return -EINVAL;
+ str = blobmsg_data(cur);
+ is_sit = !strcmp(str, "sit");
+
+ if (is_sit) {
+ p.iph.protocol = IPPROTO_IPV6;
+ base = "sit0";
+ } else
+ return -EINVAL;
+
+ if (!parse_ipaddr(tb[TUNNEL_ATTR_LOCAL], &p.iph.saddr))
+ return -EINVAL;
+
+ if (!parse_ipaddr(tb[TUNNEL_ATTR_REMOTE], &p.iph.daddr))
+ return -EINVAL;
+
+ if ((cur = tb[TUNNEL_ATTR_TTL])) {
+ unsigned int val = blobmsg_get_u32(cur);
+
+ if (val > 255)
+ return -EINVAL;
+
+ p.iph.ttl = val;
+ }
+
+ strncpy(p.name, name, sizeof(p.name));
+ if (tunnel_ioctl(base, SIOCADDTUNNEL, &p) < 0)
+ return -1;
+
+#ifdef SIOCADD6RD
+ cur = tb[TUNNEL_ATTR_6RD_PREFIX];
+ if (cur && is_sit) {
+ unsigned int mask;
+ struct ip_tunnel_6rd p6;
+
+ memset(&p6, 0, sizeof(p6));
+
+ if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
+ &p6.prefix, &mask) || mask > 128)
+ return -EINVAL;
+ p6.prefixlen = mask;
+
+ if ((cur = tb[TUNNEL_ATTR_6RD_RELAY_PREFIX])) {
+ if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
+ &p6.relay_prefix, &mask) || mask > 32)
+ return -EINVAL;
+ p6.relay_prefixlen = mask;
+ }
+
+ if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
+ system_del_ip_tunnel(name);
+ return -1;
+ }
+ }
+#endif
+
+ return 0;
+}