2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
4 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
5 * Copyright (C) 2013 Steven Barth <steven@midlink.org>
6 * Copyright (C) 2014 Gioacchino Mazzurco <gio@eigenlab.org>
7 * Copyright (C) 2017 Matthias Schiffer <mschiffer@universe-factory.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2
11 * as published by the Free Software Foundation
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
20 #include <sys/socket.h>
21 #include <sys/ioctl.h>
23 #include <sys/syscall.h>
26 #include <net/if_arp.h>
28 #include <arpa/inet.h>
29 #include <netinet/ether.h>
30 #include <netinet/in.h>
32 #include <linux/rtnetlink.h>
33 #include <linux/sockios.h>
35 #include <linux/if_addr.h>
36 #include <linux/if_link.h>
37 #include <linux/if_vlan.h>
38 #include <linux/if_bridge.h>
39 #include <linux/if_tunnel.h>
40 #include <linux/ip6_tunnel.h>
41 #include <linux/ethtool.h>
42 #include <linux/fib_rules.h>
43 #include <linux/veth.h>
44 #include <linux/version.h>
46 #ifndef RTN_FAILED_POLICY
47 #define RTN_FAILED_POLICY 12
50 #ifndef IFA_F_NOPREFIXROUTE
51 #define IFA_F_NOPREFIXROUTE 0x200
55 #define IFA_FLAGS (IFA_MULTICAST + 1)
64 #include <netlink/msg.h>
65 #include <netlink/attr.h>
66 #include <netlink/socket.h>
67 #include <libubox/uloop.h>
74 struct uloop_fd uloop;
79 static int sock_ioctl = -1;
80 static struct nl_sock *sock_rtnl = NULL;
82 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
83 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
84 static int system_add_proto_tunnel(const char *name, const uint8_t proto,
85 const unsigned int link, struct blob_attr **tb);
86 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb);
88 static char dev_buf[256];
91 handler_nl_event(struct uloop_fd *u, unsigned int events)
93 struct event_socket *ev = container_of(u, struct event_socket, uloop);
95 socklen_t errlen = sizeof(err);
98 nl_recvmsgs_default(ev->sock);
102 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
107 // Increase rx buffer size on netlink socket
109 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
112 // Request full dump since some info got dropped
113 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
114 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
124 uloop_fd_delete(&ev->uloop);
128 static struct nl_sock *
129 create_socket(int protocol, int groups)
131 struct nl_sock *sock;
133 sock = nl_socket_alloc();
138 nl_join_groups(sock, groups);
140 if (nl_connect(sock, protocol))
147 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
148 uloop_fd_handler cb, int flags)
150 ev->sock = create_socket(protocol, groups);
154 ev->uloop.fd = nl_socket_get_fd(ev->sock);
156 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
163 create_event_socket(struct event_socket *ev, int protocol,
164 int (*cb)(struct nl_msg *msg, void *arg))
166 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
169 // Install the valid custom callback handler
170 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
172 // Disable sequence number checking on event sockets
173 nl_socket_disable_seq_check(ev->sock);
175 // Increase rx buffer size to 65K on event sockets
177 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
184 system_rtn_aton(const char *src, unsigned int *dst)
189 if (!strcmp(src, "local"))
191 else if (!strcmp(src, "nat"))
193 else if (!strcmp(src, "broadcast"))
195 else if (!strcmp(src, "anycast"))
197 else if (!strcmp(src, "multicast"))
199 else if (!strcmp(src, "prohibit"))
201 else if (!strcmp(src, "unreachable"))
203 else if (!strcmp(src, "blackhole"))
205 else if (!strcmp(src, "xresolve"))
207 else if (!strcmp(src, "unicast"))
209 else if (!strcmp(src, "throw"))
211 else if (!strcmp(src, "failed_policy"))
212 n = RTN_FAILED_POLICY;
214 n = strtoul(src, &e, 0);
215 if (!e || *e || e == src || n > 255)
224 system_tos_aton(const char *src, unsigned *dst)
228 *dst = strtoul(src, &e, 16);
229 if (e == src || *e || *dst > 255)
235 int system_init(void)
237 static struct event_socket rtnl_event;
238 static struct event_socket hotplug_event;
240 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
241 system_fd_set_cloexec(sock_ioctl);
243 // Prepare socket for routing / address control
244 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
248 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
251 if (!create_raw_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT, 1,
252 handle_hotplug_event, 0))
255 // Receive network link events form kernel
256 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
261 static void system_set_sysctl(const char *path, const char *val)
265 fd = open(path, O_WRONLY);
269 if (write(fd, val, strlen(val))) {}
273 static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
275 snprintf(dev_buf, sizeof(dev_buf), path, device);
276 system_set_sysctl(dev_buf, val);
279 static void system_set_disable_ipv6(struct device *dev, const char *val)
281 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
284 static void system_set_rpfilter(struct device *dev, const char *val)
286 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val);
289 static void system_set_acceptlocal(struct device *dev, const char *val)
291 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev->ifname, val);
294 static void system_set_igmpversion(struct device *dev, const char *val)
296 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev->ifname, val);
299 static void system_set_mldversion(struct device *dev, const char *val)
301 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev->ifname, val);
304 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
306 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev->ifname, val);
309 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
311 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev->ifname, val);
314 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
316 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time", dev->ifname, val);
319 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
321 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time", dev->ifname, val);
324 static void system_set_neigh4locktime(struct device *dev, const char *val)
326 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime", dev->ifname, val);
329 static void system_set_dadtransmits(struct device *dev, const char *val)
331 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits", dev->ifname, val);
334 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
336 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_to_unicast", dev->ifname, val);
339 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
341 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_fast_leave", dev->ifname, val);
344 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
346 system_set_dev_sysctl("/sys/class/net/%s/brport/hairpin_mode", dev->ifname, val);
349 static void system_bridge_set_isolate_mode(struct device *dev, const char *val)
351 system_set_dev_sysctl("/sys/class/net/%s/brport/isolate_mode", dev->ifname, val);
354 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
356 system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
357 "/sys/class/net/%s/brport/multicast_router",
361 static void system_bridge_set_robustness(struct device *dev, const char *val)
363 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
365 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
369 static void system_bridge_set_query_interval(struct device *dev, const char *val)
371 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
375 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
377 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
381 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
383 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
387 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
389 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
393 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
395 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
399 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
401 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
405 static void system_bridge_set_learning(struct device *dev, const char *val)
407 system_set_dev_sysctl("/sys/class/net/%s/brport/learning", dev->ifname, val);
410 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
412 system_set_dev_sysctl("/sys/class/net/%s/brport/unicast_flood", dev->ifname, val);
415 static void system_set_sendredirects(struct device *dev, const char *val)
417 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects", dev->ifname, val);
420 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
422 int fd = -1, ret = -1;
424 fd = open(path, O_RDONLY);
428 ssize_t len = read(fd, buf, buf_sz - 1);
442 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
444 snprintf(dev_buf, sizeof(dev_buf), path, device);
445 return system_get_sysctl(dev_buf, buf, buf_sz);
448 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
450 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
451 dev->ifname, buf, buf_sz);
454 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
456 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
457 dev->ifname, buf, buf_sz);
460 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
462 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
463 dev->ifname, buf, buf_sz);
466 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
468 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
469 dev->ifname, buf, buf_sz);
472 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
474 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
475 dev->ifname, buf, buf_sz);
478 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
480 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
481 dev->ifname, buf, buf_sz);
484 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
486 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
487 dev->ifname, buf, buf_sz);
490 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
492 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time",
493 dev->ifname, buf, buf_sz);
496 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
498 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time",
499 dev->ifname, buf, buf_sz);
502 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
504 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime",
505 dev->ifname, buf, buf_sz);
508 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
510 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
511 dev->ifname, buf, buf_sz);
514 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
516 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects",
517 dev->ifname, buf, buf_sz);
520 // Evaluate netlink messages
521 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
523 struct nlmsghdr *nh = nlmsg_hdr(msg);
524 struct nlattr *nla[__IFLA_MAX];
528 if (nh->nlmsg_type != RTM_NEWLINK)
531 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
532 if (!nla[IFLA_IFNAME])
535 struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
539 if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
540 link_state = strtoul(buf, NULL, 0);
542 device_set_link(dev, link_state ? true : false);
549 handle_hotplug_msg(char *data, int size)
551 const char *subsystem = NULL, *interface = NULL, *interface_old = NULL;
552 char *cur, *end, *sep;
555 bool add, move = false;
557 if (!strncmp(data, "add@", 4))
559 else if (!strncmp(data, "remove@", 7))
561 else if (!strncmp(data, "move@", 5)) {
568 skip = strlen(data) + 1;
571 for (cur = data + skip; cur < end; cur += skip) {
572 skip = strlen(cur) + 1;
574 sep = strchr(cur, '=');
579 if (!strcmp(cur, "INTERFACE"))
581 else if (!strcmp(cur, "SUBSYSTEM")) {
583 if (strcmp(subsystem, "net") != 0)
585 } else if (!strcmp(cur, "DEVPATH_OLD")) {
586 interface_old = strrchr(sep + 1, '/');
592 if (subsystem && interface) {
593 if (move && interface_old)
602 dev = device_find(interface_old);
606 if (dev->type != &simple_device_type)
609 device_set_present(dev, false);
612 dev = device_find(interface);
616 if (dev->type != &simple_device_type)
619 if (add && system_if_force_external(dev->ifname))
622 device_set_present(dev, add);
626 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
628 struct event_socket *ev = container_of(u, struct event_socket, uloop);
629 struct sockaddr_nl nla;
630 unsigned char *buf = NULL;
633 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
635 handle_hotplug_msg((char *) buf, size);
641 static int system_rtnl_call(struct nl_msg *msg)
645 ret = nl_send_auto_complete(sock_rtnl, msg);
651 return nl_wait_for_ack(sock_rtnl);
654 int system_bridge_delbr(struct device *bridge)
656 return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
659 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
663 memset(&ifr, 0, sizeof(ifr));
665 ifr.ifr_ifindex = dev->ifindex;
668 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name));
669 return ioctl(sock_ioctl, cmd, &ifr);
672 static bool system_is_bridge(const char *name, char *buf, int buflen)
676 snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
677 if (stat(buf, &st) < 0)
683 static char *system_get_bridge(const char *name, char *buf, int buflen)
689 snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
690 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
694 len = readlink(gl.gl_pathv[0], buf, buflen);
702 path = strrchr(buf, '/');
710 system_bridge_set_wireless(struct device *bridge, struct device *dev)
712 bool mcast_to_ucast = dev->wireless_ap;
715 if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
716 !bridge->settings.multicast_to_unicast)
717 mcast_to_ucast = false;
719 if (!mcast_to_ucast || dev->wireless_isolate)
722 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
723 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
726 int system_bridge_addif(struct device *bridge, struct device *dev)
732 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
733 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
734 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
737 system_bridge_set_wireless(bridge, dev);
739 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
740 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
741 system_bridge_set_multicast_router(dev, buf, false);
744 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
745 dev->settings.multicast_fast_leave)
746 system_bridge_set_multicast_fast_leave(dev, "1");
748 if (dev->settings.flags & DEV_OPT_LEARNING &&
749 !dev->settings.learning)
750 system_bridge_set_learning(dev, "0");
752 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
753 !dev->settings.unicast_flood)
754 system_bridge_set_unicast_flood(dev, "0");
756 if (dev->settings.flags & DEV_OPT_ISOLATE &&
757 dev->settings.isolate)
758 system_bridge_set_isolate_mode(dev, "1");
763 int system_bridge_delif(struct device *bridge, struct device *dev)
765 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
768 int system_if_resolve(struct device *dev)
771 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
772 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
773 return ifr.ifr_ifindex;
778 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
782 memset(&ifr, 0, sizeof(ifr));
783 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
784 ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr);
785 ifr.ifr_flags |= add;
786 ifr.ifr_flags &= ~rem;
787 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
799 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
801 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
803 return ifa->ifa_index == ifindex;
806 static bool check_route(struct nlmsghdr *hdr, int ifindex)
808 struct rtmsg *r = NLMSG_DATA(hdr);
809 struct nlattr *tb[__RTA_MAX];
811 if (r->rtm_protocol == RTPROT_KERNEL &&
812 r->rtm_family == AF_INET6)
815 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
819 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
822 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
827 static int cb_clear_event(struct nl_msg *msg, void *arg)
829 struct clear_data *clr = arg;
830 struct nlmsghdr *hdr = nlmsg_hdr(msg);
831 bool (*cb)(struct nlmsghdr *, int ifindex);
837 if (hdr->nlmsg_type != RTM_NEWADDR)
844 if (hdr->nlmsg_type != RTM_NEWROUTE)
851 if (hdr->nlmsg_type != RTM_NEWRULE)
860 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
863 if (type == RTM_DELRULE)
864 D(SYSTEM, "Remove a rule\n");
866 D(SYSTEM, "Remove %s from device %s\n",
867 type == RTM_DELADDR ? "an address" : "a route",
869 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
870 hdr = nlmsg_hdr(clr->msg);
871 hdr->nlmsg_type = type;
872 hdr->nlmsg_flags = NLM_F_REQUEST;
874 nl_socket_disable_auto_ack(sock_rtnl);
875 nl_send_auto_complete(sock_rtnl, clr->msg);
876 nl_socket_enable_auto_ack(sock_rtnl);
882 cb_finish_event(struct nl_msg *msg, void *arg)
890 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
893 *pending = err->error;
898 system_if_clear_entries(struct device *dev, int type, int af)
900 struct clear_data clr;
901 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
904 .rtm_flags = RTM_F_CLONED,
906 int flags = NLM_F_DUMP;
915 clr.size = sizeof(struct rtgenmsg);
918 clr.size = sizeof(struct rtmsg);
927 clr.msg = nlmsg_alloc_simple(type, flags);
931 nlmsg_append(clr.msg, &rtm, clr.size, 0);
932 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
933 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
934 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
936 nl_send_auto_complete(sock_rtnl, clr.msg);
938 nl_recvmsgs(sock_rtnl, cb);
946 * Clear bridge (membership) state and bring down device
948 void system_if_clear_state(struct device *dev)
950 static char buf[256];
953 device_set_ifindex(dev, system_if_resolve(dev));
954 if (dev->external || !dev->ifindex)
957 system_if_flags(dev->ifname, 0, IFF_UP);
959 if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
960 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
961 system_bridge_delbr(dev);
965 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
967 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
968 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
971 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
972 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
973 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
974 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
975 system_set_disable_ipv6(dev, "0");
978 static inline unsigned long
979 sec_to_jiffies(int val)
981 return (unsigned long) val * 100;
984 static void system_bridge_conf_multicast_deps(struct device *bridge,
985 struct bridge_config *cfg,
991 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
992 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
993 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
994 val = cfg->robustness * cfg->query_interval +
995 cfg->query_response_interval;
997 snprintf(buf, buf_len, "%i", val);
998 system_bridge_set_membership_interval(bridge, buf);
1000 val = cfg->robustness * cfg->query_interval +
1001 cfg->query_response_interval / 2;
1003 snprintf(buf, buf_len, "%i", val);
1004 system_bridge_set_other_querier_timeout(bridge, buf);
1007 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1008 val = cfg->query_interval / 4;
1010 snprintf(buf, buf_len, "%i", val);
1011 system_bridge_set_startup_query_interval(bridge, buf);
1015 static void system_bridge_conf_multicast(struct device *bridge,
1016 struct bridge_config *cfg,
1020 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
1021 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
1023 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
1024 bridge->ifname, cfg->multicast_querier ? "1" : "0");
1026 snprintf(buf, buf_len, "%i", cfg->hash_max);
1027 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
1028 bridge->ifname, buf);
1030 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
1031 snprintf(buf, buf_len, "%u", bridge->settings.multicast_router);
1032 system_bridge_set_multicast_router(bridge, buf, true);
1035 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1036 snprintf(buf, buf_len, "%i", cfg->robustness);
1037 system_bridge_set_robustness(bridge, buf);
1040 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1041 snprintf(buf, buf_len, "%i", cfg->query_interval);
1042 system_bridge_set_query_interval(bridge, buf);
1045 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1046 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
1047 system_bridge_set_query_response_interval(bridge, buf);
1050 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1051 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1052 system_bridge_set_last_member_interval(bridge, buf);
1055 system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1058 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1061 unsigned long args[4] = {};
1063 if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1066 args[0] = BRCTL_SET_BRIDGE_STP_STATE;
1067 args[1] = !!cfg->stp;
1068 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1070 args[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY;
1071 args[1] = sec_to_jiffies(cfg->forward_delay);
1072 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1074 system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1076 args[0] = BRCTL_SET_BRIDGE_PRIORITY;
1077 args[1] = cfg->priority;
1078 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1080 if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1081 args[0] = BRCTL_SET_AGEING_TIME;
1082 args[1] = sec_to_jiffies(cfg->ageing_time);
1083 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1086 if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
1087 args[0] = BRCTL_SET_BRIDGE_HELLO_TIME;
1088 args[1] = sec_to_jiffies(cfg->hello_time);
1089 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1092 if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
1093 args[0] = BRCTL_SET_BRIDGE_MAX_AGE;
1094 args[1] = sec_to_jiffies(cfg->max_age);
1095 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1101 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1104 struct nlattr *linkinfo, *data;
1105 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1107 static const struct {
1109 enum macvlan_mode val;
1111 { "private", MACVLAN_MODE_PRIVATE },
1112 { "vepa", MACVLAN_MODE_VEPA },
1113 { "bridge", MACVLAN_MODE_BRIDGE },
1114 { "passthru", MACVLAN_MODE_PASSTHRU },
1117 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1122 nlmsg_append(msg, &iim, sizeof(iim), 0);
1124 if (cfg->flags & MACVLAN_OPT_MACADDR)
1125 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1126 nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1127 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1129 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1130 goto nla_put_failure;
1132 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1134 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1135 goto nla_put_failure;
1138 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1139 if (strcmp(cfg->mode, modes[i].name) != 0)
1142 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1147 nla_nest_end(msg, data);
1148 nla_nest_end(msg, linkinfo);
1150 rv = system_rtnl_call(msg);
1152 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1161 static int system_link_del(const char *ifname)
1164 struct ifinfomsg iim = {
1165 .ifi_family = AF_UNSPEC,
1169 msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1174 nlmsg_append(msg, &iim, sizeof(iim), 0);
1175 nla_put_string(msg, IFLA_IFNAME, ifname);
1176 return system_rtnl_call(msg);
1179 int system_macvlan_del(struct device *macvlan)
1181 return system_link_del(macvlan->ifname);
1184 int system_veth_add(struct device *veth, struct veth_config *cfg)
1187 struct ifinfomsg empty_iim = {};
1188 struct nlattr *linkinfo, *data, *veth_info;
1191 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1196 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1198 if (cfg->flags & VETH_OPT_MACADDR)
1199 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1200 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1202 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1203 goto nla_put_failure;
1205 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1207 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1208 goto nla_put_failure;
1210 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1211 goto nla_put_failure;
1213 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1215 if (cfg->flags & VETH_OPT_PEER_NAME)
1216 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1217 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1218 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1220 nla_nest_end(msg, veth_info);
1221 nla_nest_end(msg, data);
1222 nla_nest_end(msg, linkinfo);
1224 rv = system_rtnl_call(msg);
1226 if (cfg->flags & VETH_OPT_PEER_NAME)
1227 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1229 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1239 int system_veth_del(struct device *veth)
1241 return system_link_del(veth->ifname);
1244 static int system_vlan(struct device *dev, int id)
1246 struct vlan_ioctl_args ifr = {
1247 .cmd = SET_VLAN_NAME_TYPE_CMD,
1248 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1251 ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1254 ifr.cmd = DEL_VLAN_CMD;
1257 ifr.cmd = ADD_VLAN_CMD;
1260 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1261 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1264 int system_vlan_add(struct device *dev, int id)
1266 return system_vlan(dev, id);
1269 int system_vlan_del(struct device *dev)
1271 return system_vlan(dev, -1);
1274 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1277 struct nlattr *linkinfo, *data;
1278 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1281 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1286 nlmsg_append(msg, &iim, sizeof(iim), 0);
1287 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1288 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1290 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1291 goto nla_put_failure;
1293 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1295 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1296 goto nla_put_failure;
1298 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1300 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1301 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1303 if(cfg->proto == VLAN_PROTO_8021AD)
1304 netifd_log_message(L_WARNING, "%s Your kernel is older than linux 3.10.0, 802.1ad is not supported defaulting to 802.1q", vlandev->type->name);
1307 nla_nest_end(msg, data);
1308 nla_nest_end(msg, linkinfo);
1310 rv = system_rtnl_call(msg);
1312 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1321 int system_vlandev_del(struct device *vlandev)
1323 return system_link_del(vlandev->ifname);
1327 system_if_get_settings(struct device *dev, struct device_settings *s)
1332 memset(&ifr, 0, sizeof(ifr));
1333 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1335 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1336 s->mtu = ifr.ifr_mtu;
1337 s->flags |= DEV_OPT_MTU;
1340 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1342 s->flags |= DEV_OPT_MTU6;
1344 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1345 s->txqueuelen = ifr.ifr_qlen;
1346 s->flags |= DEV_OPT_TXQUEUELEN;
1349 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1350 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1351 s->flags |= DEV_OPT_MACADDR;
1354 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1355 s->ipv6 = !strtoul(buf, NULL, 0);
1356 s->flags |= DEV_OPT_IPV6;
1359 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1360 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1361 s->flags |= DEV_OPT_PROMISC;
1363 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1364 s->flags |= DEV_OPT_MULTICAST;
1367 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1368 s->rpfilter = strtoul(buf, NULL, 0);
1369 s->flags |= DEV_OPT_RPFILTER;
1372 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1373 s->acceptlocal = strtoul(buf, NULL, 0);
1374 s->flags |= DEV_OPT_ACCEPTLOCAL;
1377 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1378 s->igmpversion = strtoul(buf, NULL, 0);
1379 s->flags |= DEV_OPT_IGMPVERSION;
1382 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1383 s->mldversion = strtoul(buf, NULL, 0);
1384 s->flags |= DEV_OPT_MLDVERSION;
1387 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1388 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1389 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1392 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1393 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1394 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1397 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1398 s->neigh4locktime = strtol(buf, NULL, 0);
1399 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1402 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1403 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1404 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1407 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1408 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1409 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1412 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1413 s->dadtransmits = strtoul(buf, NULL, 0);
1414 s->flags |= DEV_OPT_DADTRANSMITS;
1417 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1418 s->sendredirects = strtoul(buf, NULL, 0);
1419 s->flags |= DEV_OPT_SENDREDIRECTS;
1424 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1429 memset(&ifr, 0, sizeof(ifr));
1430 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1431 if (s->flags & DEV_OPT_MTU & apply_mask) {
1432 ifr.ifr_mtu = s->mtu;
1433 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1434 s->flags &= ~DEV_OPT_MTU;
1436 if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1437 system_update_ipv6_mtu(dev, s->mtu6);
1439 if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1440 ifr.ifr_qlen = s->txqueuelen;
1441 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1442 s->flags &= ~DEV_OPT_TXQUEUELEN;
1444 if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1445 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1446 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1447 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1448 s->flags &= ~DEV_OPT_MACADDR;
1450 if (s->flags & DEV_OPT_IPV6 & apply_mask)
1451 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1452 if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1453 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1454 !s->promisc ? IFF_PROMISC : 0) < 0)
1455 s->flags &= ~DEV_OPT_PROMISC;
1457 if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1458 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1459 system_set_rpfilter(dev, buf);
1461 if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1462 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1463 if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1464 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1465 system_set_igmpversion(dev, buf);
1467 if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1468 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1469 system_set_mldversion(dev, buf);
1471 if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1472 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1473 system_set_neigh4reachabletime(dev, buf);
1474 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1475 system_set_neigh6reachabletime(dev, buf);
1477 if (s->flags & DEV_OPT_NEIGHLOCKTIME & apply_mask) {
1478 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1479 system_set_neigh4locktime(dev, buf);
1481 if (s->flags & DEV_OPT_NEIGHGCSTALETIME & apply_mask) {
1482 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1483 system_set_neigh4gcstaletime(dev, buf);
1484 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1485 system_set_neigh6gcstaletime(dev, buf);
1487 if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1488 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1489 system_set_dadtransmits(dev, buf);
1491 if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1492 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1493 !s->multicast ? IFF_MULTICAST : 0) < 0)
1494 s->flags &= ~DEV_OPT_MULTICAST;
1496 if (s->flags & DEV_OPT_SENDREDIRECTS & apply_mask)
1497 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1500 int system_if_up(struct device *dev)
1502 system_if_get_settings(dev, &dev->orig_settings);
1503 /* Only keep orig settings based on what needs to be set */
1504 dev->orig_settings.valid_flags = dev->orig_settings.flags;
1505 dev->orig_settings.flags &= dev->settings.flags;
1506 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1507 return system_if_flags(dev->ifname, IFF_UP, 0);
1510 int system_if_down(struct device *dev)
1512 int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1513 system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1517 struct if_check_data {
1523 #ifndef IFF_LOWER_UP
1524 #define IFF_LOWER_UP 0x10000
1527 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1529 struct nlmsghdr *nh = nlmsg_hdr(msg);
1530 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1531 struct if_check_data *chk = (struct if_check_data *)arg;
1533 if (nh->nlmsg_type != RTM_NEWLINK)
1536 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1537 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1542 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1544 struct if_check_data *chk = (struct if_check_data *)arg;
1549 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1551 struct if_check_data *chk = (struct if_check_data *)arg;
1553 device_set_present(chk->dev, false);
1554 device_set_link(chk->dev, false);
1555 chk->pending = err->error;
1560 int system_if_check(struct device *dev)
1562 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1564 struct ifinfomsg ifi = {
1565 .ifi_family = AF_UNSPEC,
1568 struct if_check_data chk = {
1574 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1578 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1579 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1582 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1583 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1584 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1586 nl_send_auto_complete(sock_rtnl, msg);
1587 while (chk.pending > 0)
1588 nl_recvmsgs(sock_rtnl, cb);
1600 system_if_get_parent(struct device *dev)
1602 char buf[64], *devname;
1603 int ifindex, iflink, len;
1606 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1607 f = fopen(buf, "r");
1611 len = fread(buf, 1, sizeof(buf) - 1, f);
1618 iflink = strtoul(buf, NULL, 0);
1619 ifindex = system_if_resolve(dev);
1620 if (!iflink || iflink == ifindex)
1623 devname = if_indextoname(iflink, buf);
1627 return device_get(devname, true);
1631 read_string_file(int dir_fd, const char *file, char *buf, int len)
1637 fd = openat(dir_fd, file, O_RDONLY);
1642 len = read(fd, buf, len - 1);
1646 } else if (len > 0) {
1649 c = strchr(buf, '\n');
1662 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1667 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1669 *val = strtoull(buf, NULL, 0);
1674 /* Assume advertised flags == supported flags */
1675 static const struct {
1678 } ethtool_link_modes[] = {
1679 { ADVERTISED_10baseT_Half, "10H" },
1680 { ADVERTISED_10baseT_Full, "10F" },
1681 { ADVERTISED_100baseT_Half, "100H" },
1682 { ADVERTISED_100baseT_Full, "100F" },
1683 { ADVERTISED_1000baseT_Half, "1000H" },
1684 { ADVERTISED_1000baseT_Full, "1000F" },
1687 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1690 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1691 if (mask & ethtool_link_modes[i].mask)
1692 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1697 system_if_force_external(const char *ifname)
1702 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1703 return stat(buf, &s) == 0;
1707 system_if_dump_info(struct device *dev, struct blob_buf *b)
1709 struct ethtool_cmd ecmd;
1714 memset(&ecmd, 0, sizeof(ecmd));
1715 memset(&ifr, 0, sizeof(ifr));
1716 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1717 ifr.ifr_data = (caddr_t) &ecmd;
1718 ecmd.cmd = ETHTOOL_GSET;
1720 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1721 c = blobmsg_open_array(b, "link-advertising");
1722 system_add_link_modes(b, ecmd.advertising);
1723 blobmsg_close_array(b, c);
1725 c = blobmsg_open_array(b, "link-supported");
1726 system_add_link_modes(b, ecmd.supported);
1727 blobmsg_close_array(b, c);
1729 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1730 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1731 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1732 blobmsg_add_string_buffer(b);
1739 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1741 const char *const counters[] = {
1742 "collisions", "rx_frame_errors", "tx_compressed",
1743 "multicast", "rx_length_errors", "tx_dropped",
1744 "rx_bytes", "rx_missed_errors", "tx_errors",
1745 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1746 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1747 "rx_dropped", "tx_aborted_errors", "tx_packets",
1748 "rx_errors", "tx_bytes", "tx_window_errors",
1749 "rx_fifo_errors", "tx_carrier_errors",
1756 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1757 stats_dir = open(buf, O_DIRECTORY);
1761 for (i = 0; i < ARRAY_SIZE(counters); i++)
1762 if (read_uint64_file(stats_dir, counters[i], &val))
1763 blobmsg_add_u64(b, counters[i], val);
1769 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1771 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1772 int alen = v4 ? 4 : 16;
1773 unsigned int flags = 0;
1774 struct ifaddrmsg ifa = {
1775 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1776 .ifa_prefixlen = addr->mask,
1777 .ifa_index = dev->ifindex,
1781 if (cmd == RTM_NEWADDR)
1782 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1784 msg = nlmsg_alloc_simple(cmd, flags);
1788 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1789 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1791 if (addr->broadcast)
1792 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1793 if (addr->point_to_point)
1794 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1796 time_t now = system_get_rtime();
1797 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1799 if (addr->preferred_until) {
1800 int64_t preferred = addr->preferred_until - now;
1803 else if (preferred > UINT32_MAX)
1804 preferred = UINT32_MAX;
1806 cinfo.ifa_prefered = preferred;
1809 if (addr->valid_until) {
1810 int64_t valid = addr->valid_until - now;
1815 else if (valid > UINT32_MAX)
1818 cinfo.ifa_valid = valid;
1821 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
1823 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
1824 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
1827 return system_rtnl_call(msg);
1830 int system_add_address(struct device *dev, struct device_addr *addr)
1832 return system_addr(dev, addr, RTM_NEWADDR);
1835 int system_del_address(struct device *dev, struct device_addr *addr)
1837 return system_addr(dev, addr, RTM_DELADDR);
1840 static int system_rt(struct device *dev, struct device_route *route, int cmd)
1842 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1844 unsigned int flags = 0;
1847 have_gw = !!route->nexthop.in.s_addr;
1849 have_gw = route->nexthop.in6.s6_addr32[0] ||
1850 route->nexthop.in6.s6_addr32[1] ||
1851 route->nexthop.in6.s6_addr32[2] ||
1852 route->nexthop.in6.s6_addr32[3];
1854 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
1855 ? route->table : RT_TABLE_MAIN;
1857 struct rtmsg rtm = {
1858 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1859 .rtm_dst_len = route->mask,
1860 .rtm_src_len = route->sourcemask,
1861 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
1862 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
1863 .rtm_scope = RT_SCOPE_NOWHERE,
1864 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
1865 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
1869 if (cmd == RTM_NEWROUTE) {
1870 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1872 if (!dev) { // Add null-route
1873 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1874 rtm.rtm_type = RTN_UNREACHABLE;
1877 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
1880 if (route->flags & DEVROUTE_TYPE) {
1881 rtm.rtm_type = route->type;
1882 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
1883 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
1884 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
1885 rtm.rtm_table = RT_TABLE_LOCAL;
1888 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
1889 rtm.rtm_scope = RT_SCOPE_HOST;
1890 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
1891 rtm.rtm_type == RTN_ANYCAST) {
1892 rtm.rtm_scope = RT_SCOPE_LINK;
1893 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
1894 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
1895 rtm.rtm_type == RTN_THROW) {
1896 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1901 msg = nlmsg_alloc_simple(cmd, flags);
1905 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1908 nla_put(msg, RTA_DST, alen, &route->addr);
1910 if (route->sourcemask) {
1911 if (rtm.rtm_family == AF_INET)
1912 nla_put(msg, RTA_PREFSRC, alen, &route->source);
1914 nla_put(msg, RTA_SRC, alen, &route->source);
1917 if (route->metric > 0)
1918 nla_put_u32(msg, RTA_PRIORITY, route->metric);
1921 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
1924 nla_put_u32(msg, RTA_OIF, dev->ifindex);
1927 nla_put_u32(msg, RTA_TABLE, table);
1929 if (route->flags & DEVROUTE_MTU) {
1930 struct nlattr *metrics;
1932 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
1933 goto nla_put_failure;
1935 nla_put_u32(msg, RTAX_MTU, route->mtu);
1937 nla_nest_end(msg, metrics);
1940 return system_rtnl_call(msg);
1947 int system_add_route(struct device *dev, struct device_route *route)
1949 return system_rt(dev, route, RTM_NEWROUTE);
1952 int system_del_route(struct device *dev, struct device_route *route)
1954 return system_rt(dev, route, RTM_DELROUTE);
1957 int system_flush_routes(void)
1959 const char *names[] = {
1960 "/proc/sys/net/ipv4/route/flush",
1961 "/proc/sys/net/ipv6/route/flush"
1965 for (i = 0; i < ARRAY_SIZE(names); i++) {
1966 fd = open(names[i], O_WRONLY);
1970 if (write(fd, "-1", 2)) {}
1976 bool system_resolve_rt_type(const char *type, unsigned int *id)
1978 return system_rtn_aton(type, id);
1981 bool system_resolve_rt_proto(const char *type, unsigned int *id)
1985 unsigned int n, proto = 256;
1986 n = strtoul(type, &e, 0);
1987 if (!*e && e != type)
1989 else if (!strcmp(type, "unspec"))
1990 proto = RTPROT_UNSPEC;
1991 else if (!strcmp(type, "kernel"))
1992 proto = RTPROT_KERNEL;
1993 else if (!strcmp(type, "boot"))
1994 proto = RTPROT_BOOT;
1995 else if (!strcmp(type, "static"))
1996 proto = RTPROT_STATIC;
1997 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
1998 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
1999 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2002 n = strtoul(e, NULL, 10);
2003 e = strtok(NULL, " \t\n");
2005 if (e && !strcmp(e, type)) {
2020 bool system_resolve_rt_table(const char *name, unsigned int *id)
2024 unsigned int n, table = RT_TABLE_UNSPEC;
2026 /* first try to parse table as number */
2027 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2030 /* handle well known aliases */
2031 else if (!strcmp(name, "default"))
2032 table = RT_TABLE_DEFAULT;
2033 else if (!strcmp(name, "main"))
2034 table = RT_TABLE_MAIN;
2035 else if (!strcmp(name, "local"))
2036 table = RT_TABLE_LOCAL;
2038 /* try to look up name in /etc/iproute2/rt_tables */
2039 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2041 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2043 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2046 n = strtoul(e, NULL, 10);
2047 e = strtok(NULL, " \t\n");
2049 if (e && !strcmp(e, name))
2059 if (table == RT_TABLE_UNSPEC)
2066 bool system_is_default_rt_table(unsigned int id)
2068 return (id == RT_TABLE_MAIN);
2071 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2076 if (!strcmp(filter, "strict"))
2078 else if (!strcmp(filter, "loose"))
2081 n = strtoul(filter, &e, 0);
2082 if (*e || e == filter || n > 2)
2090 static int system_iprule(struct iprule *rule, int cmd)
2092 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2095 struct rtmsg rtm = {
2096 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2097 .rtm_protocol = RTPROT_STATIC,
2098 .rtm_scope = RT_SCOPE_UNIVERSE,
2099 .rtm_table = RT_TABLE_UNSPEC,
2100 .rtm_type = RTN_UNSPEC,
2104 if (cmd == RTM_NEWRULE)
2105 rtm.rtm_type = RTN_UNICAST;
2108 rtm.rtm_flags |= FIB_RULE_INVERT;
2110 if (rule->flags & IPRULE_SRC)
2111 rtm.rtm_src_len = rule->src_mask;
2113 if (rule->flags & IPRULE_DEST)
2114 rtm.rtm_dst_len = rule->dest_mask;
2116 if (rule->flags & IPRULE_TOS)
2117 rtm.rtm_tos = rule->tos;
2119 if (rule->flags & IPRULE_LOOKUP) {
2120 if (rule->lookup < 256)
2121 rtm.rtm_table = rule->lookup;
2124 if (rule->flags & IPRULE_ACTION)
2125 rtm.rtm_type = rule->action;
2126 else if (rule->flags & IPRULE_GOTO)
2127 rtm.rtm_type = FR_ACT_GOTO;
2128 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2129 rtm.rtm_type = FR_ACT_NOP;
2131 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2136 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2138 if (rule->flags & IPRULE_IN)
2139 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2141 if (rule->flags & IPRULE_OUT)
2142 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2144 if (rule->flags & IPRULE_SRC)
2145 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2147 if (rule->flags & IPRULE_DEST)
2148 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2150 if (rule->flags & IPRULE_PRIORITY)
2151 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2152 else if (cmd == RTM_NEWRULE)
2153 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2155 if (rule->flags & IPRULE_FWMARK)
2156 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2158 if (rule->flags & IPRULE_FWMASK)
2159 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2161 if (rule->flags & IPRULE_LOOKUP) {
2162 if (rule->lookup >= 256)
2163 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2166 if (rule->flags & IPRULE_SUP_PREFIXLEN)
2167 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2169 if (rule->flags & IPRULE_GOTO)
2170 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2172 return system_rtnl_call(msg);
2175 int system_add_iprule(struct iprule *rule)
2177 return system_iprule(rule, RTM_NEWRULE);
2180 int system_del_iprule(struct iprule *rule)
2182 return system_iprule(rule, RTM_DELRULE);
2185 int system_flush_iprules(void)
2190 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2191 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2193 memset(&rule, 0, sizeof(rule));
2196 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2199 rule.lookup = RT_TABLE_LOCAL;
2200 rv |= system_iprule(&rule, RTM_NEWRULE);
2202 rule.priority = 32766;
2203 rule.lookup = RT_TABLE_MAIN;
2204 rv |= system_iprule(&rule, RTM_NEWRULE);
2206 rule.priority = 32767;
2207 rule.lookup = RT_TABLE_DEFAULT;
2208 rv |= system_iprule(&rule, RTM_NEWRULE);
2211 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2214 rule.lookup = RT_TABLE_LOCAL;
2215 rv |= system_iprule(&rule, RTM_NEWRULE);
2217 rule.priority = 32766;
2218 rule.lookup = RT_TABLE_MAIN;
2219 rv |= system_iprule(&rule, RTM_NEWRULE);
2224 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2226 return system_rtn_aton(action, id);
2229 time_t system_get_rtime(void)
2234 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
2237 if (gettimeofday(&tv, NULL) == 0)
2244 #define IP_DF 0x4000
2247 static int tunnel_ioctl(const char *name, int cmd, void *p)
2251 memset(&ifr, 0, sizeof(ifr));
2252 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
2253 ifr.ifr_ifru.ifru_data = p;
2254 return ioctl(sock_ioctl, cmd, &ifr);
2257 #ifdef IFLA_IPTUN_MAX
2258 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2259 struct blob_attr **tb)
2261 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2262 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2263 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2264 struct blob_attr *cur;
2265 int ret = 0, ttl = 0;
2270 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2271 nla_put_string(nlm, IFLA_IFNAME, name);
2274 nla_put_u32(nlm, IFLA_LINK, link);
2276 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2282 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2283 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2290 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2292 if ((cur = tb[TUNNEL_ATTR_TTL]))
2293 ttl = blobmsg_get_u32(cur);
2295 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2296 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2297 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, 4);
2299 struct in6_addr in6buf;
2300 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2301 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2305 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2308 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2309 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2313 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2316 #ifdef IFLA_IPTUN_FMR_MAX
2317 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2318 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2319 struct blob_attr *dcur;
2320 unsigned drem, fmrcnt = 0;
2322 blobmsg_for_each_attr(dcur, cur, drem) {
2323 if (blobmsg_type(dcur) != BLOBMSG_TYPE_ARRAY ||
2324 strcmp(blobmsg_name(dcur), "fmrs") ||
2325 blobmsg_check_array(dcur, BLOBMSG_TYPE_UNSPEC) <= 0)
2328 struct blob_attr *rcur;
2330 blobmsg_for_each_attr(rcur, dcur, rrem) {
2331 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
2332 struct in6_addr ip6prefix;
2333 struct in_addr ip4prefix;
2334 unsigned ip4len, ip6len, ealen, offset;
2336 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
2337 blobmsg_data(rcur), blobmsg_len(rcur));
2339 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
2340 !parse_ip_and_netmask(AF_INET6,
2341 blobmsg_data(tb_cur), &ip6prefix,
2347 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
2348 !parse_ip_and_netmask(AF_INET,
2349 blobmsg_data(tb_cur), &ip4prefix,
2355 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
2359 ealen = blobmsg_get_u32(tb_cur);
2361 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
2365 offset = blobmsg_get_u32(tb_cur);
2367 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2369 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2370 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2371 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2372 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2373 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2374 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2376 nla_nest_end(nlm, rule);
2379 nla_nest_end(nlm, fmrs);
2383 nla_nest_end(nlm, infodata);
2384 nla_nest_end(nlm, linkinfo);
2386 return system_rtnl_call(nlm);
2394 #ifdef IFLA_IPTUN_MAX
2395 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2396 static int system_add_gre_tunnel(const char *name, const char *kind,
2397 const unsigned int link, struct blob_attr **tb, bool v6)
2400 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2401 struct blob_attr *cur;
2402 uint32_t ikey = 0, okey = 0, flags = 0, flowinfo = 0;
2403 uint16_t iflags = 0, oflags = 0;
2405 int ret = 0, ttl = 0;
2407 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2411 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2412 nla_put_string(nlm, IFLA_IFNAME, name);
2414 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2420 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2421 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2428 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2430 if ((cur = tb[TUNNEL_ATTR_TTL]))
2431 ttl = blobmsg_get_u32(cur);
2433 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2434 char *str = blobmsg_get_string(cur);
2435 if (strcmp(str, "inherit")) {
2438 if (!system_tos_aton(str, &uval)) {
2444 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2449 flags |= IP6_TNL_F_USE_ORIG_TCLASS;
2455 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2456 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
2458 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
2459 blobmsg_data(cur), blobmsg_len(cur));
2461 if ((cur = tb_data[GRE_DATA_IKEY])) {
2462 if ((ikey = blobmsg_get_u32(cur)))
2466 if ((cur = tb_data[GRE_DATA_OKEY])) {
2467 if ((okey = blobmsg_get_u32(cur)))
2471 if ((cur = tb_data[GRE_DATA_ICSUM])) {
2472 if (blobmsg_get_bool(cur))
2476 if ((cur = tb_data[GRE_DATA_OCSUM])) {
2477 if (blobmsg_get_bool(cur))
2481 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
2482 if (blobmsg_get_bool(cur))
2486 if ((cur = tb[GRE_DATA_OSEQNO])) {
2487 if (blobmsg_get_bool(cur))
2493 struct in6_addr in6buf;
2494 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2495 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2499 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2502 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2503 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2507 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2509 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, 4);
2512 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2515 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags);
2520 struct in_addr inbuf;
2523 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2524 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2528 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2531 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2532 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2536 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2538 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2540 okey = inbuf.s_addr;
2545 ikey = inbuf.s_addr;
2551 if ((cur = tb[TUNNEL_ATTR_DF]))
2552 set_df = blobmsg_get_bool(cur);
2555 /* ttl != 0 and nopmtudisc are incompatible */
2563 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2565 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2569 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2572 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2575 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2578 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
2581 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
2583 nla_nest_end(nlm, infodata);
2584 nla_nest_end(nlm, linkinfo);
2586 return system_rtnl_call(nlm);
2595 static int system_add_vti_tunnel(const char *name, const char *kind,
2596 const unsigned int link, struct blob_attr **tb, bool v6)
2599 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2600 struct blob_attr *cur;
2603 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2607 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2608 nla_put_string(nlm, IFLA_IFNAME, name);
2610 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2616 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2617 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2624 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2627 struct in6_addr in6buf;
2628 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2629 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2633 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2636 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2637 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2641 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2645 struct in_addr inbuf;
2647 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2648 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2652 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2655 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2656 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2660 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2665 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2666 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
2667 uint32_t ikey = 0, okey = 0;
2669 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
2670 blobmsg_data(cur), blobmsg_len(cur));
2672 if ((cur = tb_data[VTI_DATA_IKEY])) {
2673 if ((ikey = blobmsg_get_u32(cur)))
2674 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2677 if ((cur = tb_data[VTI_DATA_OKEY])) {
2678 if ((okey = blobmsg_get_u32(cur)))
2679 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2683 nla_nest_end(nlm, infodata);
2684 nla_nest_end(nlm, linkinfo);
2686 return system_rtnl_call(nlm);
2694 #ifdef IFLA_VXLAN_MAX
2695 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
2697 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
2699 struct nlattr *linkinfo, *data;
2700 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
2701 struct blob_attr *cur;
2704 if ((cur = tb[TUNNEL_ATTR_DATA]))
2705 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
2706 blobmsg_data(cur), blobmsg_len(cur));
2710 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
2715 nlmsg_append(msg, &iim, sizeof(iim), 0);
2717 nla_put_string(msg, IFLA_IFNAME, name);
2719 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
2720 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
2726 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
2729 if ((cur = tb[TUNNEL_ATTR_MTU])) {
2730 uint32_t mtu = blobmsg_get_u32(cur);
2731 nla_put_u32(msg, IFLA_MTU, mtu);
2734 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
2739 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
2741 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
2747 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
2749 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
2750 uint32_t id = blobmsg_get_u32(cur);
2751 if (id >= (1u << 24) - 1) {
2756 nla_put_u32(msg, IFLA_VXLAN_ID, id);
2760 struct in6_addr in6buf;
2761 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2762 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2766 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
2769 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2770 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2774 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
2777 struct in_addr inbuf;
2779 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2780 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2784 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
2787 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2788 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2792 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
2796 uint32_t port = 4789;
2797 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
2798 port = blobmsg_get_u32(cur);
2799 if (port < 1 || port > 65535) {
2804 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
2806 if ((cur = tb_data[VXLAN_DATA_ATTR_RXCSUM])) {
2807 bool rxcsum = blobmsg_get_bool(cur);
2808 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, !rxcsum);
2811 if ((cur = tb_data[VXLAN_DATA_ATTR_TXCSUM])) {
2812 bool txcsum = blobmsg_get_bool(cur);
2813 nla_put_u8(msg, IFLA_VXLAN_UDP_CSUM, txcsum);
2814 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, !txcsum);
2817 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2818 char *str = blobmsg_get_string(cur);
2821 if (strcmp(str, "inherit")) {
2822 if (!system_tos_aton(str, &tos)) {
2828 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
2831 if ((cur = tb[TUNNEL_ATTR_TTL])) {
2832 uint32_t ttl = blobmsg_get_u32(cur);
2833 if (ttl < 1 || ttl > 255) {
2838 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
2841 nla_nest_end(msg, data);
2842 nla_nest_end(msg, linkinfo);
2844 ret = system_rtnl_call(msg);
2846 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
2856 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
2858 struct blob_attr *cur;
2861 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
2865 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2866 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
2868 struct ip_tunnel_6rd p6;
2870 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
2871 blobmsg_data(cur), blobmsg_len(cur));
2873 memset(&p6, 0, sizeof(p6));
2875 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
2876 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
2877 &p6.prefix, &mask) || mask > 128) {
2882 p6.prefixlen = mask;
2885 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
2886 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
2887 &p6.relay_prefix, &mask) || mask > 32) {
2892 p6.relay_prefixlen = mask;
2895 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
2905 __system_del_ip_tunnel(name, tb);
2909 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
2911 struct blob_attr *cur;
2913 struct ip_tunnel_parm p = {
2922 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
2923 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
2926 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
2927 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
2930 if ((cur = tb[TUNNEL_ATTR_DF]))
2931 set_df = blobmsg_get_bool(cur);
2933 if ((cur = tb[TUNNEL_ATTR_TTL]))
2934 p.iph.ttl = blobmsg_get_u32(cur);
2936 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2937 char *str = blobmsg_get_string(cur);
2938 if (strcmp(str, "inherit")) {
2941 if (!system_tos_aton(str, &uval))
2949 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
2950 /* ttl !=0 and nopmtudisc are incompatible */
2951 if (p.iph.ttl && p.iph.frag_off == 0)
2954 strncpy(p.name, name, sizeof(p.name));
2956 switch (p.iph.protocol) {
2958 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
2960 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
2967 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
2969 struct blob_attr *cur;
2972 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2974 str = blobmsg_data(cur);
2976 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
2977 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
2978 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
2979 !strcmp(str, "vxlan") || !strcmp(str, "vxlan6"))
2980 return system_link_del(name);
2982 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
2985 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
2987 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2989 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2990 blob_data(attr), blob_len(attr));
2992 return __system_del_ip_tunnel(name, tb);
2995 int system_update_ipv6_mtu(struct device *dev, int mtu)
3001 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
3004 fd = open(buf, O_RDWR);
3009 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3016 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3025 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
3027 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3028 struct blob_attr *cur;
3031 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3032 blob_data(attr), blob_len(attr));
3034 __system_del_ip_tunnel(name, tb);
3036 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3038 str = blobmsg_data(cur);
3040 unsigned int ttl = 0;
3041 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3042 ttl = blobmsg_get_u32(cur);
3047 unsigned int link = 0;
3048 if ((cur = tb[TUNNEL_ATTR_LINK])) {
3049 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3053 if (iface->l3_dev.dev)
3054 link = iface->l3_dev.dev->ifindex;
3057 if (!strcmp(str, "sit"))
3058 return system_add_sit_tunnel(name, link, tb);
3059 #ifdef IFLA_IPTUN_MAX
3060 else if (!strcmp(str, "ipip6")) {
3061 return system_add_ip6_tunnel(name, link, tb);
3062 } else if (!strcmp(str, "greip")) {
3063 return system_add_gre_tunnel(name, "gre", link, tb, false);
3064 } else if (!strcmp(str, "gretapip")) {
3065 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3066 } else if (!strcmp(str, "greip6")) {
3067 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3068 } else if (!strcmp(str, "gretapip6")) {
3069 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3071 } else if (!strcmp(str, "vtiip")) {
3072 return system_add_vti_tunnel(name, "vti", link, tb, false);
3073 } else if (!strcmp(str, "vtiip6")) {
3074 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3076 #ifdef IFLA_VXLAN_MAX
3077 } else if(!strcmp(str, "vxlan")) {
3078 return system_add_vxlan(name, link, tb, false);
3079 } else if(!strcmp(str, "vxlan6")) {
3080 return system_add_vxlan(name, link, tb, true);
3083 } else if (!strcmp(str, "ipip")) {
3084 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);