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>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2
9 * as published by the Free Software Foundation
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
18 #include <sys/socket.h>
19 #include <sys/ioctl.h>
21 #include <sys/syscall.h>
24 #include <net/if_arp.h>
26 #include <arpa/inet.h>
27 #include <netinet/in.h>
29 #include <linux/rtnetlink.h>
30 #include <linux/sockios.h>
32 #include <linux/if_link.h>
33 #include <linux/if_vlan.h>
34 #include <linux/if_bridge.h>
35 #include <linux/if_tunnel.h>
36 #include <linux/ip6_tunnel.h>
37 #include <linux/ethtool.h>
38 #include <linux/fib_rules.h>
40 #ifndef RTN_FAILED_POLICY
41 #define RTN_FAILED_POLICY 12
49 #include <netlink/msg.h>
50 #include <netlink/attr.h>
51 #include <netlink/socket.h>
52 #include <libubox/uloop.h>
59 struct uloop_fd uloop
;
64 static int sock_ioctl
= -1;
65 static struct nl_sock
*sock_rtnl
= NULL
;
67 static int cb_rtnl_event(struct nl_msg
*msg
, void *arg
);
68 static void handle_hotplug_event(struct uloop_fd
*u
, unsigned int events
);
70 static char dev_buf
[256];
73 handler_nl_event(struct uloop_fd
*u
, unsigned int events
)
75 struct event_socket
*ev
= container_of(u
, struct event_socket
, uloop
);
77 socklen_t errlen
= sizeof(err
);
80 nl_recvmsgs_default(ev
->sock
);
84 if (getsockopt(u
->fd
, SOL_SOCKET
, SO_ERROR
, (void *)&err
, &errlen
))
89 // Increase rx buffer size on netlink socket
91 if (nl_socket_set_buffer_size(ev
->sock
, ev
->bufsize
, 0))
94 // Request full dump since some info got dropped
95 struct rtgenmsg msg
= { .rtgen_family
= AF_UNSPEC
};
96 nl_send_simple(ev
->sock
, RTM_GETLINK
, NLM_F_DUMP
, &msg
, sizeof(msg
));
106 uloop_fd_delete(&ev
->uloop
);
110 static struct nl_sock
*
111 create_socket(int protocol
, int groups
)
113 struct nl_sock
*sock
;
115 sock
= nl_socket_alloc();
120 nl_join_groups(sock
, groups
);
122 if (nl_connect(sock
, protocol
))
129 create_raw_event_socket(struct event_socket
*ev
, int protocol
, int groups
,
130 uloop_fd_handler cb
, int flags
)
132 ev
->sock
= create_socket(protocol
, groups
);
136 ev
->uloop
.fd
= nl_socket_get_fd(ev
->sock
);
138 if (uloop_fd_add(&ev
->uloop
, ULOOP_READ
|flags
))
145 create_event_socket(struct event_socket
*ev
, int protocol
,
146 int (*cb
)(struct nl_msg
*msg
, void *arg
))
148 if (!create_raw_event_socket(ev
, protocol
, 0, handler_nl_event
, ULOOP_ERROR_CB
))
151 // Install the valid custom callback handler
152 nl_socket_modify_cb(ev
->sock
, NL_CB_VALID
, NL_CB_CUSTOM
, cb
, NULL
);
154 // Disable sequence number checking on event sockets
155 nl_socket_disable_seq_check(ev
->sock
);
157 // Increase rx buffer size to 65K on event sockets
159 if (nl_socket_set_buffer_size(ev
->sock
, ev
->bufsize
, 0))
165 int system_init(void)
167 static struct event_socket rtnl_event
;
168 static struct event_socket hotplug_event
;
170 sock_ioctl
= socket(AF_LOCAL
, SOCK_DGRAM
, 0);
171 system_fd_set_cloexec(sock_ioctl
);
173 // Prepare socket for routing / address control
174 sock_rtnl
= create_socket(NETLINK_ROUTE
, 0);
178 if (!create_event_socket(&rtnl_event
, NETLINK_ROUTE
, cb_rtnl_event
))
181 if (!create_raw_event_socket(&hotplug_event
, NETLINK_KOBJECT_UEVENT
, 1,
182 handle_hotplug_event
, 0))
185 // Receive network link events form kernel
186 nl_socket_add_membership(rtnl_event
.sock
, RTNLGRP_LINK
);
191 static void system_set_sysctl(const char *path
, const char *val
)
195 fd
= open(path
, O_WRONLY
);
199 if (write(fd
, val
, strlen(val
))) {}
203 static void system_set_dev_sysctl(const char *path
, const char *device
, const char *val
)
205 snprintf(dev_buf
, sizeof(dev_buf
), path
, device
);
206 system_set_sysctl(dev_buf
, val
);
209 static void system_set_disable_ipv6(struct device
*dev
, const char *val
)
211 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev
->ifname
, val
);
215 #define IFF_LOWER_UP 0x10000
218 // Evaluate netlink messages
219 static int cb_rtnl_event(struct nl_msg
*msg
, void *arg
)
221 struct nlmsghdr
*nh
= nlmsg_hdr(msg
);
222 struct ifinfomsg
*ifi
= NLMSG_DATA(nh
);
223 struct nlattr
*nla
[__IFLA_MAX
];
225 if (nh
->nlmsg_type
!= RTM_NEWLINK
)
228 nlmsg_parse(nh
, sizeof(*ifi
), nla
, __IFLA_MAX
- 1, NULL
);
229 if (!nla
[IFLA_IFNAME
])
232 struct device
*dev
= device_get(nla_data(nla
[IFLA_IFNAME
]), false);
236 device_set_ifindex(dev
, ifi
->ifi_index
);
237 device_set_link(dev
, ifi
->ifi_flags
& IFF_LOWER_UP
? true : false);
244 handle_hotplug_msg(char *data
, int size
)
246 const char *subsystem
= NULL
, *interface
= NULL
;
247 char *cur
, *end
, *sep
;
252 if (!strncmp(data
, "add@", 4))
254 else if (!strncmp(data
, "remove@", 7))
259 skip
= strlen(data
) + 1;
262 for (cur
= data
+ skip
; cur
< end
; cur
+= skip
) {
263 skip
= strlen(cur
) + 1;
265 sep
= strchr(cur
, '=');
270 if (!strcmp(cur
, "INTERFACE"))
272 else if (!strcmp(cur
, "SUBSYSTEM")) {
274 if (strcmp(subsystem
, "net") != 0)
277 if (subsystem
&& interface
)
283 dev
= device_get(interface
, false);
287 if (dev
->type
!= &simple_device_type
)
290 if (add
&& system_if_force_external(dev
->ifname
))
293 device_set_present(dev
, add
);
297 handle_hotplug_event(struct uloop_fd
*u
, unsigned int events
)
299 struct event_socket
*ev
= container_of(u
, struct event_socket
, uloop
);
300 struct sockaddr_nl nla
;
301 unsigned char *buf
= NULL
;
304 while ((size
= nl_recv(ev
->sock
, &nla
, &buf
, NULL
)) > 0) {
306 handle_hotplug_msg((char *) buf
, size
);
312 static int system_rtnl_call(struct nl_msg
*msg
)
316 ret
= nl_send_auto_complete(sock_rtnl
, msg
);
322 return nl_wait_for_ack(sock_rtnl
);
325 int system_bridge_delbr(struct device
*bridge
)
327 return ioctl(sock_ioctl
, SIOCBRDELBR
, bridge
->ifname
);
330 static int system_bridge_if(const char *bridge
, struct device
*dev
, int cmd
, void *data
)
334 memset(&ifr
, 0, sizeof(ifr
));
336 ifr
.ifr_ifindex
= dev
->ifindex
;
339 strncpy(ifr
.ifr_name
, bridge
, sizeof(ifr
.ifr_name
));
340 return ioctl(sock_ioctl
, cmd
, &ifr
);
343 static bool system_is_bridge(const char *name
, char *buf
, int buflen
)
347 snprintf(buf
, buflen
, "/sys/devices/virtual/net/%s/bridge", name
);
348 if (stat(buf
, &st
) < 0)
354 static char *system_get_bridge(const char *name
, char *buf
, int buflen
)
360 snprintf(buf
, buflen
, "/sys/devices/virtual/net/*/brif/%s/bridge", name
);
361 if (glob(buf
, GLOB_NOSORT
, NULL
, &gl
) < 0)
364 if (gl
.gl_pathc
== 0)
367 len
= readlink(gl
.gl_pathv
[0], buf
, buflen
);
372 path
= strrchr(buf
, '/');
379 int system_bridge_addif(struct device
*bridge
, struct device
*dev
)
383 system_set_disable_ipv6(dev
, "1");
384 oldbr
= system_get_bridge(dev
->ifname
, dev_buf
, sizeof(dev_buf
));
385 if (oldbr
&& !strcmp(oldbr
, bridge
->ifname
))
388 return system_bridge_if(bridge
->ifname
, dev
, SIOCBRADDIF
, NULL
);
391 int system_bridge_delif(struct device
*bridge
, struct device
*dev
)
393 system_set_disable_ipv6(dev
, "0");
394 return system_bridge_if(bridge
->ifname
, dev
, SIOCBRDELIF
, NULL
);
397 static int system_if_resolve(struct device
*dev
)
400 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
401 if (!ioctl(sock_ioctl
, SIOCGIFINDEX
, &ifr
))
402 return ifr
.ifr_ifindex
;
407 static int system_if_flags(const char *ifname
, unsigned add
, unsigned rem
)
411 memset(&ifr
, 0, sizeof(ifr
));
412 strncpy(ifr
.ifr_name
, ifname
, sizeof(ifr
.ifr_name
));
413 ioctl(sock_ioctl
, SIOCGIFFLAGS
, &ifr
);
414 ifr
.ifr_flags
|= add
;
415 ifr
.ifr_flags
&= ~rem
;
416 return ioctl(sock_ioctl
, SIOCSIFFLAGS
, &ifr
);
428 static bool check_ifaddr(struct nlmsghdr
*hdr
, int ifindex
)
430 struct ifaddrmsg
*ifa
= NLMSG_DATA(hdr
);
432 return ifa
->ifa_index
== ifindex
;
435 static bool check_route(struct nlmsghdr
*hdr
, int ifindex
)
437 struct rtmsg
*r
= NLMSG_DATA(hdr
);
438 struct nlattr
*tb
[__RTA_MAX
];
440 if (r
->rtm_protocol
== RTPROT_KERNEL
&&
441 r
->rtm_family
== AF_INET6
)
444 nlmsg_parse(hdr
, sizeof(struct rtmsg
), tb
, __RTA_MAX
- 1, NULL
);
448 return *(int *)RTA_DATA(tb
[RTA_OIF
]) == ifindex
;
451 static bool check_rule(struct nlmsghdr
*hdr
, int ifindex
)
456 static int cb_clear_event(struct nl_msg
*msg
, void *arg
)
458 struct clear_data
*clr
= arg
;
459 struct nlmsghdr
*hdr
= nlmsg_hdr(msg
);
460 bool (*cb
)(struct nlmsghdr
*, int ifindex
);
466 if (hdr
->nlmsg_type
!= RTM_NEWADDR
)
473 if (hdr
->nlmsg_type
!= RTM_NEWROUTE
)
480 if (hdr
->nlmsg_type
!= RTM_NEWRULE
)
489 if (!cb(hdr
, clr
->dev
? clr
->dev
->ifindex
: 0))
492 if (type
== RTM_DELRULE
)
493 D(SYSTEM
, "Remove a rule\n");
495 D(SYSTEM
, "Remove %s from device %s\n",
496 type
== RTM_DELADDR
? "an address" : "a route",
498 memcpy(nlmsg_hdr(clr
->msg
), hdr
, hdr
->nlmsg_len
);
499 hdr
= nlmsg_hdr(clr
->msg
);
500 hdr
->nlmsg_type
= type
;
501 hdr
->nlmsg_flags
= NLM_F_REQUEST
;
503 nl_socket_disable_auto_ack(sock_rtnl
);
504 nl_send_auto_complete(sock_rtnl
, clr
->msg
);
505 nl_socket_enable_auto_ack(sock_rtnl
);
511 cb_finish_event(struct nl_msg
*msg
, void *arg
)
519 error_handler(struct sockaddr_nl
*nla
, struct nlmsgerr
*err
, void *arg
)
522 *pending
= err
->error
;
527 system_if_clear_entries(struct device
*dev
, int type
, int af
)
529 struct clear_data clr
;
530 struct nl_cb
*cb
= nl_cb_alloc(NL_CB_DEFAULT
);
533 .rtm_flags
= RTM_F_CLONED
,
535 int flags
= NLM_F_DUMP
;
544 clr
.size
= sizeof(struct rtgenmsg
);
547 clr
.size
= sizeof(struct rtmsg
);
556 clr
.msg
= nlmsg_alloc_simple(type
, flags
);
560 nlmsg_append(clr
.msg
, &rtm
, clr
.size
, 0);
561 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb_clear_event
, &clr
);
562 nl_cb_set(cb
, NL_CB_FINISH
, NL_CB_CUSTOM
, cb_finish_event
, &pending
);
563 nl_cb_err(cb
, NL_CB_CUSTOM
, error_handler
, &pending
);
565 nl_send_auto_complete(sock_rtnl
, clr
.msg
);
567 nl_recvmsgs(sock_rtnl
, cb
);
575 * Clear bridge (membership) state and bring down device
577 void system_if_clear_state(struct device
*dev
)
579 static char buf
[256];
585 device_set_ifindex(dev
, system_if_resolve(dev
));
589 system_if_flags(dev
->ifname
, 0, IFF_UP
);
591 if (system_is_bridge(dev
->ifname
, buf
, sizeof(buf
))) {
592 D(SYSTEM
, "Delete existing bridge named '%s'\n", dev
->ifname
);
593 system_bridge_delbr(dev
);
597 bridge
= system_get_bridge(dev
->ifname
, buf
, sizeof(buf
));
599 D(SYSTEM
, "Remove device '%s' from bridge '%s'\n", dev
->ifname
, bridge
);
600 system_bridge_if(bridge
, dev
, SIOCBRDELIF
, NULL
);
603 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET
);
604 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET
);
605 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET6
);
606 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET6
);
607 system_set_disable_ipv6(dev
, "0");
610 static inline unsigned long
611 sec_to_jiffies(int val
)
613 return (unsigned long) val
* 100;
616 int system_bridge_addbr(struct device
*bridge
, struct bridge_config
*cfg
)
618 unsigned long args
[4] = {};
620 if (ioctl(sock_ioctl
, SIOCBRADDBR
, bridge
->ifname
) < 0)
623 args
[0] = BRCTL_SET_BRIDGE_STP_STATE
;
624 args
[1] = !!cfg
->stp
;
625 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
627 args
[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY
;
628 args
[1] = sec_to_jiffies(cfg
->forward_delay
);
629 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
631 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
632 bridge
->ifname
, cfg
->igmp_snoop
? "1" : "0");
634 args
[0] = BRCTL_SET_BRIDGE_PRIORITY
;
635 args
[1] = cfg
->priority
;
636 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
638 if (cfg
->flags
& BRIDGE_OPT_AGEING_TIME
) {
639 args
[0] = BRCTL_SET_AGEING_TIME
;
640 args
[1] = sec_to_jiffies(cfg
->ageing_time
);
641 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
644 if (cfg
->flags
& BRIDGE_OPT_HELLO_TIME
) {
645 args
[0] = BRCTL_SET_BRIDGE_HELLO_TIME
;
646 args
[1] = sec_to_jiffies(cfg
->hello_time
);
647 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
650 if (cfg
->flags
& BRIDGE_OPT_MAX_AGE
) {
651 args
[0] = BRCTL_SET_BRIDGE_MAX_AGE
;
652 args
[1] = sec_to_jiffies(cfg
->max_age
);
653 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
659 int system_macvlan_add(struct device
*macvlan
, struct device
*dev
, struct macvlan_config
*cfg
)
662 struct nlattr
*linkinfo
, *data
;
663 struct ifinfomsg iim
= { .ifi_family
= AF_INET
};
664 int ifindex
= system_if_resolve(dev
);
666 static const struct {
668 enum macvlan_mode val
;
670 { "private", MACVLAN_MODE_PRIVATE
},
671 { "vepa", MACVLAN_MODE_VEPA
},
672 { "bridge", MACVLAN_MODE_BRIDGE
},
673 { "passthru", MACVLAN_MODE_PASSTHRU
},
679 msg
= nlmsg_alloc_simple(RTM_NEWLINK
, NLM_F_REQUEST
| NLM_F_CREATE
| NLM_F_EXCL
);
684 nlmsg_append(msg
, &iim
, sizeof(iim
), 0);
686 if (cfg
->flags
& MACVLAN_OPT_MACADDR
)
687 nla_put(msg
, IFLA_ADDRESS
, sizeof(cfg
->macaddr
), cfg
->macaddr
);
688 nla_put(msg
, IFLA_IFNAME
, IFNAMSIZ
, macvlan
->ifname
);
689 nla_put_u32(msg
, IFLA_LINK
, ifindex
);
691 if (!(linkinfo
= nla_nest_start(msg
, IFLA_LINKINFO
)))
692 goto nla_put_failure
;
694 nla_put(msg
, IFLA_INFO_KIND
, strlen("macvlan"), "macvlan");
696 if (!(data
= nla_nest_start(msg
, IFLA_INFO_DATA
)))
697 goto nla_put_failure
;
700 for (i
= 0; i
< ARRAY_SIZE(modes
); i
++) {
701 if (strcmp(cfg
->mode
, modes
[i
].name
) != 0)
704 nla_put_u32(msg
, IFLA_MACVLAN_MODE
, modes
[i
].val
);
709 nla_nest_end(msg
, data
);
710 nla_nest_end(msg
, linkinfo
);
712 rv
= system_rtnl_call(msg
);
714 D(SYSTEM
, "Error adding macvlan '%s' over '%s': %d\n", macvlan
->ifname
, dev
->ifname
, rv
);
723 int system_macvlan_del(struct device
*macvlan
)
726 struct ifinfomsg iim
;
728 iim
.ifi_family
= AF_INET
;
731 msg
= nlmsg_alloc_simple(RTM_DELLINK
, 0);
736 nlmsg_append(msg
, &iim
, sizeof(iim
), 0);
738 nla_put(msg
, IFLA_INFO_KIND
, strlen("macvlan"), "macvlan");
739 nla_put(msg
, IFLA_IFNAME
, sizeof(macvlan
->ifname
), macvlan
->ifname
);
741 system_rtnl_call(msg
);
746 static int system_vlan(struct device
*dev
, int id
)
748 struct vlan_ioctl_args ifr
= {
749 .cmd
= SET_VLAN_NAME_TYPE_CMD
,
750 .u
.name_type
= VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD
,
753 ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
756 ifr
.cmd
= DEL_VLAN_CMD
;
759 ifr
.cmd
= ADD_VLAN_CMD
;
762 strncpy(ifr
.device1
, dev
->ifname
, sizeof(ifr
.device1
));
763 return ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
766 int system_vlan_add(struct device
*dev
, int id
)
768 return system_vlan(dev
, id
);
771 int system_vlan_del(struct device
*dev
)
773 return system_vlan(dev
, -1);
777 system_if_get_settings(struct device
*dev
, struct device_settings
*s
)
781 memset(&ifr
, 0, sizeof(ifr
));
782 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
784 if (ioctl(sock_ioctl
, SIOCGIFMTU
, &ifr
) == 0) {
785 s
->mtu
= ifr
.ifr_mtu
;
786 s
->flags
|= DEV_OPT_MTU
;
789 if (ioctl(sock_ioctl
, SIOCGIFTXQLEN
, &ifr
) == 0) {
790 s
->txqueuelen
= ifr
.ifr_qlen
;
791 s
->flags
|= DEV_OPT_TXQUEUELEN
;
794 if (ioctl(sock_ioctl
, SIOCGIFHWADDR
, &ifr
) == 0) {
795 memcpy(s
->macaddr
, &ifr
.ifr_hwaddr
.sa_data
, sizeof(s
->macaddr
));
796 s
->flags
|= DEV_OPT_MACADDR
;
801 system_if_apply_settings(struct device
*dev
, struct device_settings
*s
)
805 memset(&ifr
, 0, sizeof(ifr
));
806 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
807 if (s
->flags
& DEV_OPT_MTU
) {
808 ifr
.ifr_mtu
= s
->mtu
;
809 if (ioctl(sock_ioctl
, SIOCSIFMTU
, &ifr
) < 0)
810 s
->flags
&= ~DEV_OPT_MTU
;
812 if (s
->flags
& DEV_OPT_TXQUEUELEN
) {
813 ifr
.ifr_qlen
= s
->txqueuelen
;
814 if (ioctl(sock_ioctl
, SIOCSIFTXQLEN
, &ifr
) < 0)
815 s
->flags
&= ~DEV_OPT_TXQUEUELEN
;
817 if ((s
->flags
& DEV_OPT_MACADDR
) && !dev
->external
) {
818 ifr
.ifr_hwaddr
.sa_family
= ARPHRD_ETHER
;
819 memcpy(&ifr
.ifr_hwaddr
.sa_data
, s
->macaddr
, sizeof(s
->macaddr
));
820 if (ioctl(sock_ioctl
, SIOCSIFHWADDR
, &ifr
) < 0)
821 s
->flags
&= ~DEV_OPT_MACADDR
;
825 int system_if_up(struct device
*dev
)
827 system_if_get_settings(dev
, &dev
->orig_settings
);
828 system_if_apply_settings(dev
, &dev
->settings
);
829 device_set_ifindex(dev
, system_if_resolve(dev
));
830 return system_if_flags(dev
->ifname
, IFF_UP
, 0);
833 int system_if_down(struct device
*dev
)
835 int ret
= system_if_flags(dev
->ifname
, 0, IFF_UP
);
836 dev
->orig_settings
.flags
&= dev
->settings
.flags
;
837 system_if_apply_settings(dev
, &dev
->orig_settings
);
841 struct if_check_data
{
847 static int cb_if_check_valid(struct nl_msg
*msg
, void *arg
)
849 struct nlmsghdr
*nh
= nlmsg_hdr(msg
);
850 struct ifinfomsg
*ifi
= NLMSG_DATA(nh
);
851 struct if_check_data
*chk
= (struct if_check_data
*)arg
;
853 if (nh
->nlmsg_type
!= RTM_NEWLINK
)
856 device_set_present(chk
->dev
, ifi
->ifi_index
> 0 ? true : false);
857 device_set_link(chk
->dev
, ifi
->ifi_flags
& IFF_LOWER_UP
? true : false);
862 static int cb_if_check_ack(struct nl_msg
*msg
, void *arg
)
864 struct if_check_data
*chk
= (struct if_check_data
*)arg
;
869 static int cb_if_check_error(struct sockaddr_nl
*nla
, struct nlmsgerr
*err
, void *arg
)
871 struct if_check_data
*chk
= (struct if_check_data
*)arg
;
873 device_set_present(chk
->dev
, false);
874 device_set_link(chk
->dev
, false);
875 chk
->pending
= err
->error
;
880 int system_if_check(struct device
*dev
)
882 struct nl_cb
*cb
= nl_cb_alloc(NL_CB_DEFAULT
);
884 struct ifinfomsg ifi
= {
885 .ifi_family
= AF_UNSPEC
,
888 struct if_check_data chk
= {
894 msg
= nlmsg_alloc_simple(RTM_GETLINK
, 0);
895 if (!msg
|| nlmsg_append(msg
, &ifi
, sizeof(ifi
), 0) ||
896 nla_put_string(msg
, IFLA_IFNAME
, dev
->ifname
))
899 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb_if_check_valid
, &chk
);
900 nl_cb_set(cb
, NL_CB_ACK
, NL_CB_CUSTOM
, cb_if_check_ack
, &chk
);
901 nl_cb_err(cb
, NL_CB_CUSTOM
, cb_if_check_error
, &chk
);
903 nl_send_auto_complete(sock_rtnl
, msg
);
904 while (chk
.pending
> 0)
905 nl_recvmsgs(sock_rtnl
, cb
);
916 system_if_get_parent(struct device
*dev
)
918 char buf
[64], *devname
;
919 int ifindex
, iflink
, len
;
922 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/iflink", dev
->ifname
);
927 len
= fread(buf
, 1, sizeof(buf
) - 1, f
);
934 iflink
= strtoul(buf
, NULL
, 0);
935 ifindex
= system_if_resolve(dev
);
936 if (!iflink
|| iflink
== ifindex
)
939 devname
= if_indextoname(iflink
, buf
);
943 return device_get(devname
, true);
947 read_string_file(int dir_fd
, const char *file
, char *buf
, int len
)
953 fd
= openat(dir_fd
, file
, O_RDONLY
);
958 len
= read(fd
, buf
, len
- 1);
962 } else if (len
> 0) {
965 c
= strchr(buf
, '\n');
978 read_uint64_file(int dir_fd
, const char *file
, uint64_t *val
)
983 ret
= read_string_file(dir_fd
, file
, buf
, sizeof(buf
));
985 *val
= strtoull(buf
, NULL
, 0);
990 /* Assume advertised flags == supported flags */
991 static const struct {
994 } ethtool_link_modes
[] = {
995 { ADVERTISED_10baseT_Half
, "10H" },
996 { ADVERTISED_10baseT_Full
, "10F" },
997 { ADVERTISED_100baseT_Half
, "100H" },
998 { ADVERTISED_100baseT_Full
, "100F" },
999 { ADVERTISED_1000baseT_Half
, "1000H" },
1000 { ADVERTISED_1000baseT_Full
, "1000F" },
1003 static void system_add_link_modes(struct blob_buf
*b
, __u32 mask
)
1006 for (i
= 0; i
< ARRAY_SIZE(ethtool_link_modes
); i
++) {
1007 if (mask
& ethtool_link_modes
[i
].mask
)
1008 blobmsg_add_string(b
, NULL
, ethtool_link_modes
[i
].name
);
1013 system_if_force_external(const char *ifname
)
1018 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/phy80211", ifname
);
1019 return stat(buf
, &s
) == 0;
1023 system_if_dump_info(struct device
*dev
, struct blob_buf
*b
)
1025 struct ethtool_cmd ecmd
;
1031 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s", dev
->ifname
);
1032 dir_fd
= open(buf
, O_DIRECTORY
);
1034 memset(&ecmd
, 0, sizeof(ecmd
));
1035 memset(&ifr
, 0, sizeof(ifr
));
1036 strcpy(ifr
.ifr_name
, dev
->ifname
);
1037 ifr
.ifr_data
= (caddr_t
) &ecmd
;
1038 ecmd
.cmd
= ETHTOOL_GSET
;
1040 if (ioctl(sock_ioctl
, SIOCETHTOOL
, &ifr
) == 0) {
1041 c
= blobmsg_open_array(b
, "link-advertising");
1042 system_add_link_modes(b
, ecmd
.advertising
);
1043 blobmsg_close_array(b
, c
);
1045 c
= blobmsg_open_array(b
, "link-supported");
1046 system_add_link_modes(b
, ecmd
.supported
);
1047 blobmsg_close_array(b
, c
);
1049 s
= blobmsg_alloc_string_buffer(b
, "speed", 8);
1050 snprintf(s
, 8, "%d%c", ethtool_cmd_speed(&ecmd
),
1051 ecmd
.duplex
== DUPLEX_HALF
? 'H' : 'F');
1052 blobmsg_add_string_buffer(b
);
1060 system_if_dump_stats(struct device
*dev
, struct blob_buf
*b
)
1062 const char *const counters
[] = {
1063 "collisions", "rx_frame_errors", "tx_compressed",
1064 "multicast", "rx_length_errors", "tx_dropped",
1065 "rx_bytes", "rx_missed_errors", "tx_errors",
1066 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1067 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1068 "rx_dropped", "tx_aborted_errors", "tx_packets",
1069 "rx_errors", "tx_bytes", "tx_window_errors",
1070 "rx_fifo_errors", "tx_carrier_errors",
1077 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/statistics", dev
->ifname
);
1078 stats_dir
= open(buf
, O_DIRECTORY
);
1082 for (i
= 0; i
< ARRAY_SIZE(counters
); i
++)
1083 if (read_uint64_file(stats_dir
, counters
[i
], &val
))
1084 blobmsg_add_u64(b
, counters
[i
], val
);
1090 static int system_addr(struct device
*dev
, struct device_addr
*addr
, int cmd
)
1092 bool v4
= ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
);
1093 int alen
= v4
? 4 : 16;
1094 unsigned int flags
= 0;
1095 struct ifaddrmsg ifa
= {
1096 .ifa_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1097 .ifa_prefixlen
= addr
->mask
,
1098 .ifa_index
= dev
->ifindex
,
1102 if (cmd
== RTM_NEWADDR
)
1103 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
1105 msg
= nlmsg_alloc_simple(cmd
, flags
);
1109 nlmsg_append(msg
, &ifa
, sizeof(ifa
), 0);
1110 nla_put(msg
, IFA_LOCAL
, alen
, &addr
->addr
);
1112 if (addr
->broadcast
)
1113 nla_put_u32(msg
, IFA_BROADCAST
, addr
->broadcast
);
1114 if (addr
->point_to_point
)
1115 nla_put_u32(msg
, IFA_ADDRESS
, addr
->point_to_point
);
1117 time_t now
= system_get_rtime();
1118 struct ifa_cacheinfo cinfo
= {0xffffffffU
, 0xffffffffU
, 0, 0};
1120 if (addr
->preferred_until
) {
1121 int64_t preferred
= addr
->preferred_until
- now
;
1124 else if (preferred
> UINT32_MAX
)
1125 preferred
= UINT32_MAX
;
1127 cinfo
.ifa_prefered
= preferred
;
1130 if (addr
->valid_until
) {
1131 int64_t valid
= addr
->valid_until
- now
;
1134 else if (valid
> UINT32_MAX
)
1137 cinfo
.ifa_valid
= valid
;
1140 nla_put(msg
, IFA_CACHEINFO
, sizeof(cinfo
), &cinfo
);
1143 return system_rtnl_call(msg
);
1146 int system_add_address(struct device
*dev
, struct device_addr
*addr
)
1148 return system_addr(dev
, addr
, RTM_NEWADDR
);
1151 int system_del_address(struct device
*dev
, struct device_addr
*addr
)
1153 return system_addr(dev
, addr
, RTM_DELADDR
);
1156 static int system_rt(struct device
*dev
, struct device_route
*route
, int cmd
)
1158 int alen
= ((route
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
) ? 4 : 16;
1160 unsigned int flags
= 0;
1163 have_gw
= !!route
->nexthop
.in
.s_addr
;
1165 have_gw
= route
->nexthop
.in6
.s6_addr32
[0] ||
1166 route
->nexthop
.in6
.s6_addr32
[1] ||
1167 route
->nexthop
.in6
.s6_addr32
[2] ||
1168 route
->nexthop
.in6
.s6_addr32
[3];
1170 unsigned char scope
= (cmd
== RTM_DELROUTE
) ? RT_SCOPE_NOWHERE
:
1171 (have_gw
) ? RT_SCOPE_UNIVERSE
: RT_SCOPE_LINK
;
1173 unsigned int table
= (route
->flags
& (DEVROUTE_TABLE
| DEVROUTE_SRCTABLE
))
1174 ? route
->table
: RT_TABLE_MAIN
;
1176 struct rtmsg rtm
= {
1177 .rtm_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1178 .rtm_dst_len
= route
->mask
,
1179 .rtm_src_len
= route
->sourcemask
,
1180 .rtm_table
= (table
< 256) ? table
: RT_TABLE_UNSPEC
,
1181 .rtm_protocol
= (route
->flags
& DEVADDR_KERNEL
) ? RTPROT_KERNEL
: RTPROT_STATIC
,
1183 .rtm_type
= (cmd
== RTM_DELROUTE
) ? 0: RTN_UNICAST
,
1187 if (cmd
== RTM_NEWROUTE
) {
1188 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
1190 if (!dev
) { // Add null-route
1191 rtm
.rtm_scope
= RT_SCOPE_UNIVERSE
;
1192 rtm
.rtm_type
= RTN_UNREACHABLE
;
1196 msg
= nlmsg_alloc_simple(cmd
, flags
);
1200 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
1203 nla_put(msg
, RTA_DST
, alen
, &route
->addr
);
1205 if (route
->sourcemask
)
1206 nla_put(msg
, RTA_SRC
, alen
, &route
->source
);
1208 if (route
->metric
> 0)
1209 nla_put_u32(msg
, RTA_PRIORITY
, route
->metric
);
1212 nla_put(msg
, RTA_GATEWAY
, alen
, &route
->nexthop
);
1215 nla_put_u32(msg
, RTA_OIF
, dev
->ifindex
);
1218 nla_put_u32(msg
, RTA_TABLE
, table
);
1220 return system_rtnl_call(msg
);
1223 int system_add_route(struct device
*dev
, struct device_route
*route
)
1225 return system_rt(dev
, route
, RTM_NEWROUTE
);
1228 int system_del_route(struct device
*dev
, struct device_route
*route
)
1230 return system_rt(dev
, route
, RTM_DELROUTE
);
1233 int system_flush_routes(void)
1235 const char *names
[] = {
1236 "/proc/sys/net/ipv4/route/flush",
1237 "/proc/sys/net/ipv6/route/flush"
1241 for (i
= 0; i
< ARRAY_SIZE(names
); i
++) {
1242 fd
= open(names
[i
], O_WRONLY
);
1246 if (write(fd
, "-1", 2)) {}
1252 bool system_resolve_rt_table(const char *name
, unsigned int *id
)
1256 unsigned int n
, table
= RT_TABLE_UNSPEC
;
1258 /* first try to parse table as number */
1259 if ((n
= strtoul(name
, &e
, 0)) > 0 && !*e
)
1262 /* handle well known aliases */
1263 else if (!strcmp(name
, "default"))
1264 table
= RT_TABLE_DEFAULT
;
1265 else if (!strcmp(name
, "main"))
1266 table
= RT_TABLE_MAIN
;
1267 else if (!strcmp(name
, "local"))
1268 table
= RT_TABLE_LOCAL
;
1270 /* try to look up name in /etc/iproute2/rt_tables */
1271 else if ((f
= fopen("/etc/iproute2/rt_tables", "r")) != NULL
)
1273 while (fgets(buf
, sizeof(buf
) - 1, f
) != NULL
)
1275 if ((e
= strtok(buf
, " \t\n")) == NULL
|| *e
== '#')
1278 n
= strtoul(e
, NULL
, 10);
1279 e
= strtok(NULL
, " \t\n");
1281 if (e
&& !strcmp(e
, name
))
1291 if (table
== RT_TABLE_UNSPEC
)
1294 /* do not consider main table special */
1295 if (table
== RT_TABLE_MAIN
)
1296 table
= RT_TABLE_UNSPEC
;
1302 static int system_iprule(struct iprule
*rule
, int cmd
)
1304 int alen
= ((rule
->flags
& IPRULE_FAMILY
) == IPRULE_INET4
) ? 4 : 16;
1307 struct rtmsg rtm
= {
1308 .rtm_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1309 .rtm_protocol
= RTPROT_STATIC
,
1310 .rtm_scope
= RT_SCOPE_UNIVERSE
,
1311 .rtm_table
= RT_TABLE_UNSPEC
,
1312 .rtm_type
= RTN_UNSPEC
,
1316 if (cmd
== RTM_NEWRULE
) {
1317 rtm
.rtm_type
= RTN_UNICAST
;
1318 rtm
.rtm_flags
|= NLM_F_REPLACE
| NLM_F_EXCL
;
1322 rtm
.rtm_flags
|= FIB_RULE_INVERT
;
1324 if (rule
->flags
& IPRULE_SRC
)
1325 rtm
.rtm_src_len
= rule
->src_mask
;
1327 if (rule
->flags
& IPRULE_DEST
)
1328 rtm
.rtm_dst_len
= rule
->dest_mask
;
1330 if (rule
->flags
& IPRULE_TOS
)
1331 rtm
.rtm_tos
= rule
->tos
;
1333 if (rule
->flags
& IPRULE_LOOKUP
) {
1334 if (rule
->lookup
< 256)
1335 rtm
.rtm_table
= rule
->lookup
;
1338 if (rule
->flags
& IPRULE_ACTION
)
1339 rtm
.rtm_type
= rule
->action
;
1340 else if (rule
->flags
& IPRULE_GOTO
)
1341 rtm
.rtm_type
= FR_ACT_GOTO
;
1342 else if (!(rule
->flags
& (IPRULE_LOOKUP
| IPRULE_ACTION
| IPRULE_GOTO
)))
1343 rtm
.rtm_type
= FR_ACT_NOP
;
1345 msg
= nlmsg_alloc_simple(cmd
, NLM_F_REQUEST
);
1350 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
1352 if (rule
->flags
& IPRULE_IN
)
1353 nla_put(msg
, FRA_IFNAME
, strlen(rule
->in_dev
) + 1, rule
->in_dev
);
1355 if (rule
->flags
& IPRULE_OUT
)
1356 nla_put(msg
, FRA_OIFNAME
, strlen(rule
->out_dev
) + 1, rule
->out_dev
);
1358 if (rule
->flags
& IPRULE_SRC
)
1359 nla_put(msg
, FRA_SRC
, alen
, &rule
->src_addr
);
1361 if (rule
->flags
& IPRULE_DEST
)
1362 nla_put(msg
, FRA_DST
, alen
, &rule
->dest_addr
);
1364 if (rule
->flags
& IPRULE_PRIORITY
)
1365 nla_put_u32(msg
, FRA_PRIORITY
, rule
->priority
);
1366 else if (cmd
== RTM_NEWRULE
)
1367 nla_put_u32(msg
, FRA_PRIORITY
, rule
->order
);
1369 if (rule
->flags
& IPRULE_FWMARK
)
1370 nla_put_u32(msg
, FRA_FWMARK
, rule
->fwmark
);
1372 if (rule
->flags
& IPRULE_FWMASK
)
1373 nla_put_u32(msg
, FRA_FWMASK
, rule
->fwmask
);
1375 if (rule
->flags
& IPRULE_LOOKUP
) {
1376 if (rule
->lookup
>= 256)
1377 nla_put_u32(msg
, FRA_TABLE
, rule
->lookup
);
1380 if (rule
->flags
& IPRULE_GOTO
)
1381 nla_put_u32(msg
, FRA_GOTO
, rule
->gotoid
);
1383 return system_rtnl_call(msg
);
1386 int system_add_iprule(struct iprule
*rule
)
1388 return system_iprule(rule
, RTM_NEWRULE
);
1391 int system_del_iprule(struct iprule
*rule
)
1393 return system_iprule(rule
, RTM_DELRULE
);
1396 int system_flush_iprules(void)
1401 system_if_clear_entries(NULL
, RTM_GETRULE
, AF_INET
);
1402 system_if_clear_entries(NULL
, RTM_GETRULE
, AF_INET6
);
1404 memset(&rule
, 0, sizeof(rule
));
1407 rule
.flags
= IPRULE_INET4
| IPRULE_PRIORITY
| IPRULE_LOOKUP
;
1410 rule
.lookup
= RT_TABLE_LOCAL
;
1411 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1413 rule
.priority
= 32766;
1414 rule
.lookup
= RT_TABLE_MAIN
;
1415 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1417 rule
.priority
= 32767;
1418 rule
.lookup
= RT_TABLE_DEFAULT
;
1419 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1422 rule
.flags
= IPRULE_INET6
| IPRULE_PRIORITY
| IPRULE_LOOKUP
;
1425 rule
.lookup
= RT_TABLE_LOCAL
;
1426 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1428 rule
.priority
= 32766;
1429 rule
.lookup
= RT_TABLE_MAIN
;
1430 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1435 bool system_resolve_iprule_action(const char *action
, unsigned int *id
)
1440 if (!strcmp(action
, "local"))
1442 else if (!strcmp(action
, "nat"))
1444 else if (!strcmp(action
, "broadcast"))
1446 else if (!strcmp(action
, "anycast"))
1448 else if (!strcmp(action
, "multicast"))
1450 else if (!strcmp(action
, "prohibit"))
1452 else if (!strcmp(action
, "unreachable"))
1453 n
= RTN_UNREACHABLE
;
1454 else if (!strcmp(action
, "blackhole"))
1456 else if (!strcmp(action
, "xresolve"))
1458 else if (!strcmp(action
, "unicast"))
1460 else if (!strcmp(action
, "throw"))
1462 else if (!strcmp(action
, "failed_policy"))
1463 n
= RTN_FAILED_POLICY
;
1465 n
= strtoul(action
, &e
, 0);
1466 if (!e
|| *e
|| e
== action
|| n
> 255)
1474 time_t system_get_rtime(void)
1479 if (syscall(__NR_clock_gettime
, CLOCK_MONOTONIC
, &ts
) == 0)
1482 if (gettimeofday(&tv
, NULL
) == 0)
1489 #define IP_DF 0x4000
1492 static int tunnel_ioctl(const char *name
, int cmd
, void *p
)
1496 memset(&ifr
, 0, sizeof(ifr
));
1497 strncpy(ifr
.ifr_name
, name
, sizeof(ifr
.ifr_name
));
1498 ifr
.ifr_ifru
.ifru_data
= p
;
1499 return ioctl(sock_ioctl
, cmd
, &ifr
);
1502 int system_del_ip_tunnel(const char *name
)
1504 return tunnel_ioctl(name
, SIOCDELTUNNEL
, NULL
);
1507 int system_update_ipv6_mtu(struct device
*dev
, int mtu
)
1511 snprintf(buf
, sizeof(buf
), "/proc/sys/net/ipv6/conf/%s/mtu",
1514 int fd
= open(buf
, O_RDWR
);
1515 ssize_t len
= read(fd
, buf
, sizeof(buf
) - 1);
1522 if (!mtu
|| ret
<= mtu
)
1525 lseek(fd
, 0, SEEK_SET
);
1526 if (write(fd
, buf
, snprintf(buf
, sizeof(buf
), "%i", mtu
)) <= 0)
1534 int system_add_ip_tunnel(const char *name
, struct blob_attr
*attr
)
1536 struct blob_attr
*tb
[__TUNNEL_ATTR_MAX
];
1537 struct blob_attr
*cur
;
1541 system_del_ip_tunnel(name
);
1543 blobmsg_parse(tunnel_attr_list
.params
, __TUNNEL_ATTR_MAX
, tb
,
1544 blob_data(attr
), blob_len(attr
));
1546 if (!(cur
= tb
[TUNNEL_ATTR_TYPE
]))
1548 str
= blobmsg_data(cur
);
1550 if ((cur
= tb
[TUNNEL_ATTR_DF
]))
1551 set_df
= blobmsg_get_bool(cur
);
1553 unsigned int ttl
= 0;
1554 if ((cur
= tb
[TUNNEL_ATTR_TTL
])) {
1555 ttl
= blobmsg_get_u32(cur
);
1556 if (ttl
> 255 || (!set_df
&& ttl
))
1560 unsigned int link
= 0;
1561 if ((cur
= tb
[TUNNEL_ATTR_LINK
])) {
1562 struct interface
*iface
= vlist_find(&interfaces
, blobmsg_data(cur
), iface
, node
);
1566 if (iface
->l3_dev
.dev
)
1567 link
= iface
->l3_dev
.dev
->ifindex
;
1570 if (!strcmp(str
, "sit")) {
1571 struct ip_tunnel_parm p
= {
1576 .frag_off
= set_df
? htons(IP_DF
) : 0,
1577 .protocol
= IPPROTO_IPV6
,
1582 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
]) &&
1583 inet_pton(AF_INET
, blobmsg_data(cur
), &p
.iph
.saddr
) < 1)
1586 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
]) &&
1587 inet_pton(AF_INET
, blobmsg_data(cur
), &p
.iph
.daddr
) < 1)
1590 strncpy(p
.name
, name
, sizeof(p
.name
));
1591 if (tunnel_ioctl("sit0", SIOCADDTUNNEL
, &p
) < 0)
1595 if ((cur
= tb
[TUNNEL_ATTR_6RD_PREFIX
])) {
1597 struct ip_tunnel_6rd p6
;
1599 memset(&p6
, 0, sizeof(p6
));
1601 if (!parse_ip_and_netmask(AF_INET6
, blobmsg_data(cur
),
1602 &p6
.prefix
, &mask
) || mask
> 128)
1604 p6
.prefixlen
= mask
;
1606 if ((cur
= tb
[TUNNEL_ATTR_6RD_RELAY_PREFIX
])) {
1607 if (!parse_ip_and_netmask(AF_INET
, blobmsg_data(cur
),
1608 &p6
.relay_prefix
, &mask
) || mask
> 32)
1610 p6
.relay_prefixlen
= mask
;
1613 if (tunnel_ioctl(name
, SIOCADD6RD
, &p6
) < 0) {
1614 system_del_ip_tunnel(name
);
1619 } else if (!strcmp(str
, "ipip6")) {
1620 struct ip6_tnl_parm p
= {
1622 .proto
= IPPROTO_IPIP
,
1623 .hop_limit
= (ttl
) ? ttl
: 64,
1627 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
]) &&
1628 inet_pton(AF_INET6
, blobmsg_data(cur
), &p
.laddr
) < 1)
1631 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
]) &&
1632 inet_pton(AF_INET6
, blobmsg_data(cur
), &p
.raddr
) < 1)
1635 strncpy(p
.name
, name
, sizeof(p
.name
));
1636 if (tunnel_ioctl("ip6tnl0", SIOCADDTUNNEL
, &p
) < 0)