2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2
7 * as published by the Free Software Foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
16 #include <sys/socket.h>
17 #include <sys/ioctl.h>
19 #include <sys/syscall.h>
22 #include <net/if_arp.h>
24 #include <arpa/inet.h>
25 #include <netinet/in.h>
27 #include <linux/rtnetlink.h>
28 #include <linux/sockios.h>
30 #include <linux/if_vlan.h>
31 #include <linux/if_bridge.h>
32 #include <linux/if_tunnel.h>
33 #include <linux/ethtool.h>
41 #include <netlink/msg.h>
42 #include <netlink/attr.h>
43 #include <netlink/socket.h>
44 #include <libubox/uloop.h>
51 struct uloop_fd uloop;
56 static int sock_ioctl = -1;
57 static struct nl_sock *sock_rtnl = NULL;
59 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
60 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
62 static char dev_buf[256];
65 handler_nl_event(struct uloop_fd *u, unsigned int events)
67 struct event_socket *ev = container_of(u, struct event_socket, uloop);
68 nl_recvmsgs(ev->sock, ev->cb);
71 static struct nl_sock *
72 create_socket(int protocol, int groups)
76 sock = nl_socket_alloc();
81 nl_join_groups(sock, groups);
83 if (nl_connect(sock, protocol))
90 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
93 ev->sock = create_socket(protocol, groups);
97 ev->uloop.fd = nl_socket_get_fd(ev->sock);
99 uloop_fd_add(&ev->uloop, ULOOP_READ | ULOOP_EDGE_TRIGGER);
104 create_event_socket(struct event_socket *ev, int protocol,
105 int (*cb)(struct nl_msg *msg, void *arg))
107 // Prepare socket for link events
108 ev->cb = nl_cb_alloc(NL_CB_DEFAULT);
112 nl_cb_set(ev->cb, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
114 return create_raw_event_socket(ev, protocol, 0, handler_nl_event);
117 int system_init(void)
119 static struct event_socket rtnl_event;
120 static struct event_socket hotplug_event;
122 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
123 fcntl(sock_ioctl, F_SETFD, fcntl(sock_ioctl, F_GETFD) | FD_CLOEXEC);
125 // Prepare socket for routing / address control
126 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
130 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
133 if (!create_raw_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT, 1,
134 handle_hotplug_event))
137 // Receive network link events form kernel
138 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
143 static void system_set_sysctl(const char *path, const char *val)
147 fd = open(path, O_WRONLY);
151 write(fd, val, strlen(val));
155 static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
157 snprintf(dev_buf, sizeof(dev_buf), path, device);
158 system_set_sysctl(dev_buf, val);
161 static void system_set_disable_ipv6(struct device *dev, const char *val)
163 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
166 // Evaluate netlink messages
167 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
169 struct nlmsghdr *nh = nlmsg_hdr(msg);
170 struct ifinfomsg *ifi = NLMSG_DATA(nh);
171 struct nlattr *nla[__IFLA_MAX];
173 if (nh->nlmsg_type != RTM_DELLINK && nh->nlmsg_type != RTM_NEWLINK)
176 nlmsg_parse(nh, sizeof(*ifi), nla, __IFLA_MAX - 1, NULL);
177 if (!nla[IFLA_IFNAME])
180 struct device *dev = device_get(RTA_DATA(nla[IFLA_IFNAME]), false);
184 dev->ifindex = ifi->ifi_index;
185 /* TODO: parse link status */
192 handle_hotplug_msg(char *data, int size)
194 const char *subsystem = NULL, *interface = NULL;
195 char *cur, *end, *sep;
200 if (!strncmp(data, "add@", 4))
202 else if (!strncmp(data, "remove@", 7))
207 skip = strlen(data) + 1;
210 for (cur = data + skip; cur < end; cur += skip) {
211 skip = strlen(cur) + 1;
213 sep = strchr(cur, '=');
218 if (!strcmp(cur, "INTERFACE"))
220 else if (!strcmp(cur, "SUBSYSTEM")) {
222 if (strcmp(subsystem, "net") != 0)
225 if (subsystem && interface)
231 dev = device_get(interface, false);
235 if (dev->type != &simple_device_type)
238 if (add && system_if_force_external(dev->ifname))
241 device_set_present(dev, add);
245 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
247 struct event_socket *ev = container_of(u, struct event_socket, uloop);
248 struct sockaddr_nl nla;
249 unsigned char *buf = NULL;
252 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
254 handle_hotplug_msg((char *) buf, size);
260 static int system_rtnl_call(struct nl_msg *msg)
264 ret = nl_send_auto_complete(sock_rtnl, msg);
270 return nl_wait_for_ack(sock_rtnl);
273 int system_bridge_delbr(struct device *bridge)
275 return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
278 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
282 memset(&ifr, 0, sizeof(ifr));
284 ifr.ifr_ifindex = dev->ifindex;
287 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name));
288 return ioctl(sock_ioctl, cmd, &ifr);
291 static bool system_is_bridge(const char *name, char *buf, int buflen)
295 snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
296 if (stat(buf, &st) < 0)
302 static char *system_get_bridge(const char *name, char *buf, int buflen)
308 snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
309 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
312 if (gl.gl_pathc == 0)
315 len = readlink(gl.gl_pathv[0], buf, buflen);
320 path = strrchr(buf, '/');
327 int system_bridge_addif(struct device *bridge, struct device *dev)
331 system_set_disable_ipv6(dev, "1");
332 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
333 if (oldbr && !strcmp(oldbr, bridge->ifname))
336 return system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
339 int system_bridge_delif(struct device *bridge, struct device *dev)
341 system_set_disable_ipv6(dev, "0");
342 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
345 static int system_if_resolve(struct device *dev)
348 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
349 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
350 return ifr.ifr_ifindex;
355 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
359 memset(&ifr, 0, sizeof(ifr));
360 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
361 ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr);
362 ifr.ifr_flags |= add;
363 ifr.ifr_flags &= ~rem;
364 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
376 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
378 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
380 return ifa->ifa_index == ifindex;
383 static bool check_route(struct nlmsghdr *hdr, int ifindex)
385 struct rtmsg *r = NLMSG_DATA(hdr);
386 struct nlattr *tb[__RTA_MAX];
388 if (r->rtm_protocol == RTPROT_KERNEL &&
389 r->rtm_family == AF_INET6)
392 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
396 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
399 static int cb_clear_event(struct nl_msg *msg, void *arg)
401 struct clear_data *clr = arg;
402 struct nlmsghdr *hdr = nlmsg_hdr(msg);
403 bool (*cb)(struct nlmsghdr *, int ifindex);
409 if (hdr->nlmsg_type != RTM_NEWADDR)
416 if (hdr->nlmsg_type != RTM_NEWROUTE)
425 if (!cb(hdr, clr->dev->ifindex))
428 D(SYSTEM, "Remove %s from device %s\n",
429 type == RTM_DELADDR ? "an address" : "a route",
431 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
432 hdr = nlmsg_hdr(clr->msg);
433 hdr->nlmsg_type = type;
434 hdr->nlmsg_flags = NLM_F_REQUEST;
436 if (!nl_send_auto_complete(sock_rtnl, clr->msg))
437 nl_wait_for_ack(sock_rtnl);
443 cb_finish_event(struct nl_msg *msg, void *arg)
451 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
454 *pending = err->error;
459 system_if_clear_entries(struct device *dev, int type, int af)
461 struct clear_data clr;
462 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
465 .rtm_flags = RTM_F_CLONED,
467 int flags = NLM_F_DUMP;
475 clr.size = sizeof(struct rtgenmsg);
478 clr.size = sizeof(struct rtmsg);
487 clr.msg = nlmsg_alloc_simple(type, flags);
491 nlmsg_append(clr.msg, &rtm, clr.size, 0);
492 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
493 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
494 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
496 nl_send_auto_complete(sock_rtnl, clr.msg);
498 nl_recvmsgs(sock_rtnl, cb);
506 * Clear bridge (membership) state and bring down device
508 void system_if_clear_state(struct device *dev)
510 static char buf[256];
516 dev->ifindex = system_if_resolve(dev);
520 system_if_flags(dev->ifname, 0, IFF_UP);
522 if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
523 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
524 system_bridge_delbr(dev);
528 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
530 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
531 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
534 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
535 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
536 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
537 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
538 system_set_disable_ipv6(dev, "0");
541 static inline unsigned long
542 sec_to_jiffies(int val)
544 return (unsigned long) val * 100;
547 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
549 unsigned long args[4] = {};
551 if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
554 args[0] = BRCTL_SET_BRIDGE_STP_STATE;
555 args[1] = !!cfg->stp;
556 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
558 args[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY;
559 args[1] = sec_to_jiffies(cfg->forward_delay);
560 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
562 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
563 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
565 if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
566 args[0] = BRCTL_SET_AGEING_TIME;
567 args[1] = sec_to_jiffies(cfg->ageing_time);
568 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
571 if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
572 args[0] = BRCTL_SET_BRIDGE_HELLO_TIME;
573 args[1] = sec_to_jiffies(cfg->hello_time);
574 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
577 if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
578 args[0] = BRCTL_SET_BRIDGE_MAX_AGE;
579 args[1] = sec_to_jiffies(cfg->max_age);
580 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
586 static int system_vlan(struct device *dev, int id)
588 struct vlan_ioctl_args ifr = {
589 .cmd = SET_VLAN_NAME_TYPE_CMD,
590 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
593 ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
596 ifr.cmd = DEL_VLAN_CMD;
599 ifr.cmd = ADD_VLAN_CMD;
602 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
603 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
606 int system_vlan_add(struct device *dev, int id)
608 return system_vlan(dev, id);
611 int system_vlan_del(struct device *dev)
613 return system_vlan(dev, -1);
617 system_if_get_settings(struct device *dev, struct device_settings *s)
621 memset(&ifr, 0, sizeof(ifr));
622 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
624 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
625 s->mtu = ifr.ifr_mtu;
626 s->flags |= DEV_OPT_MTU;
629 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
630 s->txqueuelen = ifr.ifr_qlen;
631 s->flags |= DEV_OPT_TXQUEUELEN;
634 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
635 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
636 s->flags |= DEV_OPT_MACADDR;
641 system_if_apply_settings(struct device *dev, struct device_settings *s)
645 memset(&ifr, 0, sizeof(ifr));
646 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
647 if (s->flags & DEV_OPT_MTU) {
648 ifr.ifr_mtu = s->mtu;
649 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
650 s->flags &= ~DEV_OPT_MTU;
652 if (s->flags & DEV_OPT_TXQUEUELEN) {
653 ifr.ifr_qlen = s->txqueuelen;
654 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
655 s->flags &= ~DEV_OPT_TXQUEUELEN;
657 if ((s->flags & DEV_OPT_MACADDR) && !dev->external) {
658 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
659 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
660 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
661 s->flags &= ~DEV_OPT_MACADDR;
665 int system_if_up(struct device *dev)
667 system_if_get_settings(dev, &dev->orig_settings);
668 system_if_apply_settings(dev, &dev->settings);
669 dev->ifindex = system_if_resolve(dev);
670 return system_if_flags(dev->ifname, IFF_UP, 0);
673 int system_if_down(struct device *dev)
675 int ret = system_if_flags(dev->ifname, 0, IFF_UP);
676 dev->orig_settings.flags &= dev->settings.flags;
677 system_if_apply_settings(dev, &dev->orig_settings);
681 int system_if_check(struct device *dev)
683 device_set_present(dev, (system_if_resolve(dev) > 0));
688 system_if_get_parent(struct device *dev)
690 char buf[64], *devname;
691 int ifindex, iflink, len;
694 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
699 len = fread(buf, 1, sizeof(buf) - 1, f);
706 iflink = strtoul(buf, NULL, 0);
707 ifindex = system_if_resolve(dev);
708 if (!iflink || iflink == ifindex)
711 devname = if_indextoname(iflink, buf);
715 return device_get(devname, true);
719 read_string_file(int dir_fd, const char *file, char *buf, int len)
725 fd = openat(dir_fd, file, O_RDONLY);
730 len = read(fd, buf, len - 1);
734 } else if (len > 0) {
737 c = strchr(buf, '\n');
750 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
755 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
757 *val = strtoull(buf, NULL, 0);
762 /* Assume advertised flags == supported flags */
763 static const struct {
766 } ethtool_link_modes[] = {
767 { ADVERTISED_10baseT_Half, "10H" },
768 { ADVERTISED_10baseT_Full, "10F" },
769 { ADVERTISED_100baseT_Half, "100H" },
770 { ADVERTISED_100baseT_Full, "100F" },
771 { ADVERTISED_1000baseT_Half, "1000H" },
772 { ADVERTISED_1000baseT_Full, "1000F" },
775 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
778 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
779 if (mask & ethtool_link_modes[i].mask)
780 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
785 system_if_force_external(const char *ifname)
790 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
791 return stat(buf, &s) == 0;
795 system_if_dump_info(struct device *dev, struct blob_buf *b)
797 struct ethtool_cmd ecmd;
804 snprintf(buf, sizeof(buf), "/sys/class/net/%s", dev->ifname);
805 dir_fd = open(buf, O_DIRECTORY);
807 if (read_uint64_file(dir_fd, "carrier", &val))
808 blobmsg_add_u8(b, "link", !!val);
810 memset(&ecmd, 0, sizeof(ecmd));
811 memset(&ifr, 0, sizeof(ifr));
812 strcpy(ifr.ifr_name, dev->ifname);
813 ifr.ifr_data = (caddr_t) &ecmd;
814 ecmd.cmd = ETHTOOL_GSET;
816 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
817 c = blobmsg_open_array(b, "link-advertising");
818 system_add_link_modes(b, ecmd.advertising);
819 blobmsg_close_array(b, c);
821 c = blobmsg_open_array(b, "link-supported");
822 system_add_link_modes(b, ecmd.supported);
823 blobmsg_close_array(b, c);
825 s = blobmsg_alloc_string_buffer(b, "speed", 8);
826 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
827 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
828 blobmsg_add_string_buffer(b);
836 system_if_dump_stats(struct device *dev, struct blob_buf *b)
838 const char *const counters[] = {
839 "collisions", "rx_frame_errors", "tx_compressed",
840 "multicast", "rx_length_errors", "tx_dropped",
841 "rx_bytes", "rx_missed_errors", "tx_errors",
842 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
843 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
844 "rx_dropped", "tx_aborted_errors", "tx_packets",
845 "rx_errors", "tx_bytes", "tx_window_errors",
846 "rx_fifo_errors", "tx_carrier_errors",
853 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
854 stats_dir = open(buf, O_DIRECTORY);
858 for (i = 0; i < ARRAY_SIZE(counters); i++)
859 if (read_uint64_file(stats_dir, counters[i], &val))
860 blobmsg_add_u64(b, counters[i], val);
866 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
868 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
869 int alen = v4 ? 4 : 16;
870 unsigned int flags = 0;
871 struct ifaddrmsg ifa = {
872 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
873 .ifa_prefixlen = addr->mask,
874 .ifa_index = dev->ifindex,
878 if (cmd == RTM_NEWADDR)
879 flags |= NLM_F_CREATE | NLM_F_REPLACE;
881 msg = nlmsg_alloc_simple(cmd, flags);
885 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
886 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
889 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
890 if (addr->point_to_point)
891 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
893 time_t now = system_get_rtime();
894 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
896 if (addr->preferred_until) {
897 int preferred = addr->preferred_until - now;
901 cinfo.ifa_prefered = preferred;
904 if (addr->valid_until) {
905 int valid = addr->valid_until - now;
909 cinfo.ifa_valid = valid;
912 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
915 return system_rtnl_call(msg);
918 int system_add_address(struct device *dev, struct device_addr *addr)
920 return system_addr(dev, addr, RTM_NEWADDR);
923 int system_del_address(struct device *dev, struct device_addr *addr)
925 return system_addr(dev, addr, RTM_DELADDR);
928 static int system_rt(struct device *dev, struct device_route *route, int cmd)
930 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
932 unsigned int flags = 0;
935 have_gw = !!route->nexthop.in.s_addr;
937 have_gw = route->nexthop.in6.s6_addr32[0] ||
938 route->nexthop.in6.s6_addr32[1] ||
939 route->nexthop.in6.s6_addr32[2] ||
940 route->nexthop.in6.s6_addr32[3];
942 unsigned char scope = (cmd == RTM_DELROUTE) ? RT_SCOPE_NOWHERE :
943 (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
946 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
947 .rtm_dst_len = route->mask,
948 .rtm_table = RT_TABLE_MAIN,
949 .rtm_protocol = (route->flags & DEVADDR_KERNEL) ? RTPROT_KERNEL : RTPROT_STATIC,
951 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
955 if (cmd == RTM_NEWROUTE) {
956 flags |= NLM_F_CREATE | NLM_F_REPLACE;
958 if (!dev) { // Add null-route
959 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
960 rtm.rtm_type = RTN_UNREACHABLE;
964 msg = nlmsg_alloc_simple(cmd, flags);
968 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
971 nla_put(msg, RTA_DST, alen, &route->addr);
973 if (route->metric > 0)
974 nla_put_u32(msg, RTA_PRIORITY, route->metric);
977 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
980 nla_put_u32(msg, RTA_OIF, dev->ifindex);
982 return system_rtnl_call(msg);
985 int system_add_route(struct device *dev, struct device_route *route)
987 return system_rt(dev, route, RTM_NEWROUTE);
990 int system_del_route(struct device *dev, struct device_route *route)
992 return system_rt(dev, route, RTM_DELROUTE);
995 int system_flush_routes(void)
997 const char *names[] = {
998 "/proc/sys/net/ipv4/route/flush",
999 "/proc/sys/net/ipv6/route/flush"
1003 for (i = 0; i < ARRAY_SIZE(names); i++) {
1004 fd = open(names[i], O_WRONLY);
1014 time_t system_get_rtime(void)
1019 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
1022 if (gettimeofday(&tv, NULL) == 0)
1029 #define IP_DF 0x4000
1032 static void tunnel_parm_init(struct ip_tunnel_parm *p)
1034 memset(p, 0, sizeof(*p));
1037 p->iph.frag_off = htons(IP_DF);
1040 static int tunnel_ioctl(const char *name, int cmd, void *p)
1044 memset(&ifr, 0, sizeof(ifr));
1045 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
1046 ifr.ifr_ifru.ifru_data = p;
1047 return ioctl(sock_ioctl, cmd, &ifr);
1050 int system_del_ip_tunnel(const char *name)
1052 struct ip_tunnel_parm p;
1054 tunnel_parm_init(&p);
1055 return tunnel_ioctl(name, SIOCDELTUNNEL, &p);
1058 int system_update_ipv6_mtu(struct device *dev, int mtu)
1062 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
1065 int fd = open(buf, O_RDWR);
1066 ssize_t len = read(fd, buf, sizeof(buf) - 1);
1073 if (!mtu || ret <= mtu)
1076 lseek(fd, 0, SEEK_SET);
1077 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) <= 0)
1085 static int parse_ipaddr(struct blob_attr *attr, __be32 *addr)
1090 return inet_pton(AF_INET, blobmsg_data(attr), (void *) addr);
1094 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
1096 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
1097 struct blob_attr *cur;
1098 struct ip_tunnel_parm p;
1099 const char *base, *str;
1102 system_del_ip_tunnel(name);
1104 tunnel_parm_init(&p);
1106 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
1107 blob_data(attr), blob_len(attr));
1109 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
1111 str = blobmsg_data(cur);
1112 is_sit = !strcmp(str, "sit");
1115 p.iph.protocol = IPPROTO_IPV6;
1120 if (!parse_ipaddr(tb[TUNNEL_ATTR_LOCAL], &p.iph.saddr))
1123 if (!parse_ipaddr(tb[TUNNEL_ATTR_REMOTE], &p.iph.daddr))
1126 if ((cur = tb[TUNNEL_ATTR_TTL])) {
1127 unsigned int val = blobmsg_get_u32(cur);
1135 strncpy(p.name, name, sizeof(p.name));
1136 if (tunnel_ioctl(base, SIOCADDTUNNEL, &p) < 0)
1140 cur = tb[TUNNEL_ATTR_6RD_PREFIX];
1141 if (cur && is_sit) {
1143 struct ip_tunnel_6rd p6;
1145 memset(&p6, 0, sizeof(p6));
1147 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
1148 &p6.prefix, &mask) || mask > 128)
1150 p6.prefixlen = mask;
1152 if ((cur = tb[TUNNEL_ATTR_6RD_RELAY_PREFIX])) {
1153 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
1154 &p6.relay_prefix, &mask) || mask > 32)
1156 p6.relay_prefixlen = mask;
1159 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
1160 system_del_ip_tunnel(name);