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_vlan.h>
33 #include <linux/if_bridge.h>
34 #include <linux/if_tunnel.h>
35 #include <linux/ip6_tunnel.h>
36 #include <linux/ethtool.h>
37 #include <linux/fib_rules.h>
45 #include <netlink/msg.h>
46 #include <netlink/attr.h>
47 #include <netlink/socket.h>
48 #include <libubox/uloop.h>
55 struct uloop_fd uloop
;
60 static int sock_ioctl
= -1;
61 static struct nl_sock
*sock_rtnl
= NULL
;
63 static int cb_rtnl_event(struct nl_msg
*msg
, void *arg
);
64 static void handle_hotplug_event(struct uloop_fd
*u
, unsigned int events
);
66 static char dev_buf
[256];
68 static bool iprules_flushed
= false;
71 handler_nl_event(struct uloop_fd
*u
, unsigned int events
)
73 struct event_socket
*ev
= container_of(u
, struct event_socket
, uloop
);
74 nl_recvmsgs(ev
->sock
, ev
->cb
);
77 static struct nl_sock
*
78 create_socket(int protocol
, int groups
)
82 sock
= nl_socket_alloc();
87 nl_join_groups(sock
, groups
);
89 if (nl_connect(sock
, protocol
))
96 create_raw_event_socket(struct event_socket
*ev
, int protocol
, int groups
,
99 ev
->sock
= create_socket(protocol
, groups
);
103 ev
->uloop
.fd
= nl_socket_get_fd(ev
->sock
);
105 uloop_fd_add(&ev
->uloop
, ULOOP_READ
| ULOOP_EDGE_TRIGGER
);
110 create_event_socket(struct event_socket
*ev
, int protocol
,
111 int (*cb
)(struct nl_msg
*msg
, void *arg
))
113 // Prepare socket for link events
114 ev
->cb
= nl_cb_alloc(NL_CB_DEFAULT
);
118 nl_cb_set(ev
->cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb
, NULL
);
120 return create_raw_event_socket(ev
, protocol
, 0, handler_nl_event
);
123 int system_init(void)
125 static struct event_socket rtnl_event
;
126 static struct event_socket hotplug_event
;
128 sock_ioctl
= socket(AF_LOCAL
, SOCK_DGRAM
, 0);
129 fcntl(sock_ioctl
, F_SETFD
, fcntl(sock_ioctl
, F_GETFD
) | FD_CLOEXEC
);
131 // Prepare socket for routing / address control
132 sock_rtnl
= create_socket(NETLINK_ROUTE
, 0);
136 if (!create_event_socket(&rtnl_event
, NETLINK_ROUTE
, cb_rtnl_event
))
139 if (!create_raw_event_socket(&hotplug_event
, NETLINK_KOBJECT_UEVENT
, 1,
140 handle_hotplug_event
))
143 // Receive network link events form kernel
144 nl_socket_add_membership(rtnl_event
.sock
, RTNLGRP_LINK
);
149 static void system_set_sysctl(const char *path
, const char *val
)
153 fd
= open(path
, O_WRONLY
);
157 write(fd
, val
, strlen(val
));
161 static void system_set_dev_sysctl(const char *path
, const char *device
, const char *val
)
163 snprintf(dev_buf
, sizeof(dev_buf
), path
, device
);
164 system_set_sysctl(dev_buf
, val
);
167 static void system_set_disable_ipv6(struct device
*dev
, const char *val
)
169 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev
->ifname
, val
);
172 // Evaluate netlink messages
173 static int cb_rtnl_event(struct nl_msg
*msg
, void *arg
)
175 struct nlmsghdr
*nh
= nlmsg_hdr(msg
);
176 struct ifinfomsg
*ifi
= NLMSG_DATA(nh
);
177 struct nlattr
*nla
[__IFLA_MAX
];
179 if (nh
->nlmsg_type
!= RTM_DELLINK
&& nh
->nlmsg_type
!= RTM_NEWLINK
)
182 nlmsg_parse(nh
, sizeof(*ifi
), nla
, __IFLA_MAX
- 1, NULL
);
183 if (!nla
[IFLA_IFNAME
])
186 struct device
*dev
= device_get(RTA_DATA(nla
[IFLA_IFNAME
]), false);
190 dev
->ifindex
= ifi
->ifi_index
;
191 /* TODO: parse link status */
198 handle_hotplug_msg(char *data
, int size
)
200 const char *subsystem
= NULL
, *interface
= NULL
;
201 char *cur
, *end
, *sep
;
206 if (!strncmp(data
, "add@", 4))
208 else if (!strncmp(data
, "remove@", 7))
213 skip
= strlen(data
) + 1;
216 for (cur
= data
+ skip
; cur
< end
; cur
+= skip
) {
217 skip
= strlen(cur
) + 1;
219 sep
= strchr(cur
, '=');
224 if (!strcmp(cur
, "INTERFACE"))
226 else if (!strcmp(cur
, "SUBSYSTEM")) {
228 if (strcmp(subsystem
, "net") != 0)
231 if (subsystem
&& interface
)
237 dev
= device_get(interface
, false);
241 if (dev
->type
!= &simple_device_type
)
244 if (add
&& system_if_force_external(dev
->ifname
))
247 device_set_present(dev
, add
);
251 handle_hotplug_event(struct uloop_fd
*u
, unsigned int events
)
253 struct event_socket
*ev
= container_of(u
, struct event_socket
, uloop
);
254 struct sockaddr_nl nla
;
255 unsigned char *buf
= NULL
;
258 while ((size
= nl_recv(ev
->sock
, &nla
, &buf
, NULL
)) > 0) {
260 handle_hotplug_msg((char *) buf
, size
);
266 static int system_rtnl_call(struct nl_msg
*msg
)
270 ret
= nl_send_auto_complete(sock_rtnl
, msg
);
276 return nl_wait_for_ack(sock_rtnl
);
279 int system_bridge_delbr(struct device
*bridge
)
281 return ioctl(sock_ioctl
, SIOCBRDELBR
, bridge
->ifname
);
284 static int system_bridge_if(const char *bridge
, struct device
*dev
, int cmd
, void *data
)
288 memset(&ifr
, 0, sizeof(ifr
));
290 ifr
.ifr_ifindex
= dev
->ifindex
;
293 strncpy(ifr
.ifr_name
, bridge
, sizeof(ifr
.ifr_name
));
294 return ioctl(sock_ioctl
, cmd
, &ifr
);
297 static bool system_is_bridge(const char *name
, char *buf
, int buflen
)
301 snprintf(buf
, buflen
, "/sys/devices/virtual/net/%s/bridge", name
);
302 if (stat(buf
, &st
) < 0)
308 static char *system_get_bridge(const char *name
, char *buf
, int buflen
)
314 snprintf(buf
, buflen
, "/sys/devices/virtual/net/*/brif/%s/bridge", name
);
315 if (glob(buf
, GLOB_NOSORT
, NULL
, &gl
) < 0)
318 if (gl
.gl_pathc
== 0)
321 len
= readlink(gl
.gl_pathv
[0], buf
, buflen
);
326 path
= strrchr(buf
, '/');
333 int system_bridge_addif(struct device
*bridge
, struct device
*dev
)
337 system_set_disable_ipv6(dev
, "1");
338 oldbr
= system_get_bridge(dev
->ifname
, dev_buf
, sizeof(dev_buf
));
339 if (oldbr
&& !strcmp(oldbr
, bridge
->ifname
))
342 return system_bridge_if(bridge
->ifname
, dev
, SIOCBRADDIF
, NULL
);
345 int system_bridge_delif(struct device
*bridge
, struct device
*dev
)
347 system_set_disable_ipv6(dev
, "0");
348 return system_bridge_if(bridge
->ifname
, dev
, SIOCBRDELIF
, NULL
);
351 static int system_if_resolve(struct device
*dev
)
354 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
355 if (!ioctl(sock_ioctl
, SIOCGIFINDEX
, &ifr
))
356 return ifr
.ifr_ifindex
;
361 static int system_if_flags(const char *ifname
, unsigned add
, unsigned rem
)
365 memset(&ifr
, 0, sizeof(ifr
));
366 strncpy(ifr
.ifr_name
, ifname
, sizeof(ifr
.ifr_name
));
367 ioctl(sock_ioctl
, SIOCGIFFLAGS
, &ifr
);
368 ifr
.ifr_flags
|= add
;
369 ifr
.ifr_flags
&= ~rem
;
370 return ioctl(sock_ioctl
, SIOCSIFFLAGS
, &ifr
);
382 static bool check_ifaddr(struct nlmsghdr
*hdr
, int ifindex
)
384 struct ifaddrmsg
*ifa
= NLMSG_DATA(hdr
);
386 return ifa
->ifa_index
== ifindex
;
389 static bool check_route(struct nlmsghdr
*hdr
, int ifindex
)
391 struct rtmsg
*r
= NLMSG_DATA(hdr
);
392 struct nlattr
*tb
[__RTA_MAX
];
394 if (r
->rtm_protocol
== RTPROT_KERNEL
&&
395 r
->rtm_family
== AF_INET6
)
398 nlmsg_parse(hdr
, sizeof(struct rtmsg
), tb
, __RTA_MAX
- 1, NULL
);
402 return *(int *)RTA_DATA(tb
[RTA_OIF
]) == ifindex
;
405 static bool check_rule(struct nlmsghdr
*hdr
, int ifindex
)
410 static int cb_clear_event(struct nl_msg
*msg
, void *arg
)
412 struct clear_data
*clr
= arg
;
413 struct nlmsghdr
*hdr
= nlmsg_hdr(msg
);
414 bool (*cb
)(struct nlmsghdr
*, int ifindex
);
420 if (hdr
->nlmsg_type
!= RTM_NEWADDR
)
427 if (hdr
->nlmsg_type
!= RTM_NEWROUTE
)
434 if (hdr
->nlmsg_type
!= RTM_NEWRULE
)
443 if (!cb(hdr
, clr
->dev
? clr
->dev
->ifindex
: 0))
446 if (type
== RTM_DELRULE
)
447 D(SYSTEM
, "Remove a rule\n");
449 D(SYSTEM
, "Remove %s from device %s\n",
450 type
== RTM_DELADDR
? "an address" : "a route",
452 memcpy(nlmsg_hdr(clr
->msg
), hdr
, hdr
->nlmsg_len
);
453 hdr
= nlmsg_hdr(clr
->msg
);
454 hdr
->nlmsg_type
= type
;
455 hdr
->nlmsg_flags
= NLM_F_REQUEST
;
457 if (!nl_send_auto_complete(sock_rtnl
, clr
->msg
))
458 nl_wait_for_ack(sock_rtnl
);
464 cb_finish_event(struct nl_msg
*msg
, void *arg
)
472 error_handler(struct sockaddr_nl
*nla
, struct nlmsgerr
*err
, void *arg
)
475 *pending
= err
->error
;
480 system_if_clear_entries(struct device
*dev
, int type
, int af
)
482 struct clear_data clr
;
483 struct nl_cb
*cb
= nl_cb_alloc(NL_CB_DEFAULT
);
486 .rtm_flags
= RTM_F_CLONED
,
488 int flags
= NLM_F_DUMP
;
497 clr
.size
= sizeof(struct rtgenmsg
);
500 clr
.size
= sizeof(struct rtmsg
);
509 clr
.msg
= nlmsg_alloc_simple(type
, flags
);
513 nlmsg_append(clr
.msg
, &rtm
, clr
.size
, 0);
514 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb_clear_event
, &clr
);
515 nl_cb_set(cb
, NL_CB_FINISH
, NL_CB_CUSTOM
, cb_finish_event
, &pending
);
516 nl_cb_err(cb
, NL_CB_CUSTOM
, error_handler
, &pending
);
518 nl_send_auto_complete(sock_rtnl
, clr
.msg
);
520 nl_recvmsgs(sock_rtnl
, cb
);
528 * Clear bridge (membership) state and bring down device
530 void system_if_clear_state(struct device
*dev
)
532 static char buf
[256];
538 dev
->ifindex
= system_if_resolve(dev
);
542 system_if_flags(dev
->ifname
, 0, IFF_UP
);
544 if (system_is_bridge(dev
->ifname
, buf
, sizeof(buf
))) {
545 D(SYSTEM
, "Delete existing bridge named '%s'\n", dev
->ifname
);
546 system_bridge_delbr(dev
);
550 bridge
= system_get_bridge(dev
->ifname
, buf
, sizeof(buf
));
552 D(SYSTEM
, "Remove device '%s' from bridge '%s'\n", dev
->ifname
, bridge
);
553 system_bridge_if(bridge
, dev
, SIOCBRDELIF
, NULL
);
556 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET
);
557 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET
);
558 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET6
);
559 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET6
);
560 system_set_disable_ipv6(dev
, "0");
563 static inline unsigned long
564 sec_to_jiffies(int val
)
566 return (unsigned long) val
* 100;
569 int system_bridge_addbr(struct device
*bridge
, struct bridge_config
*cfg
)
571 unsigned long args
[4] = {};
573 if (ioctl(sock_ioctl
, SIOCBRADDBR
, bridge
->ifname
) < 0)
576 args
[0] = BRCTL_SET_BRIDGE_STP_STATE
;
577 args
[1] = !!cfg
->stp
;
578 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
580 args
[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY
;
581 args
[1] = sec_to_jiffies(cfg
->forward_delay
);
582 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
584 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
585 bridge
->ifname
, cfg
->igmp_snoop
? "1" : "0");
587 args
[0] = BRCTL_SET_BRIDGE_PRIORITY
;
588 args
[1] = cfg
->priority
;
589 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
591 if (cfg
->flags
& BRIDGE_OPT_AGEING_TIME
) {
592 args
[0] = BRCTL_SET_AGEING_TIME
;
593 args
[1] = sec_to_jiffies(cfg
->ageing_time
);
594 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
597 if (cfg
->flags
& BRIDGE_OPT_HELLO_TIME
) {
598 args
[0] = BRCTL_SET_BRIDGE_HELLO_TIME
;
599 args
[1] = sec_to_jiffies(cfg
->hello_time
);
600 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
603 if (cfg
->flags
& BRIDGE_OPT_MAX_AGE
) {
604 args
[0] = BRCTL_SET_BRIDGE_MAX_AGE
;
605 args
[1] = sec_to_jiffies(cfg
->max_age
);
606 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
612 static int system_vlan(struct device
*dev
, int id
)
614 struct vlan_ioctl_args ifr
= {
615 .cmd
= SET_VLAN_NAME_TYPE_CMD
,
616 .u
.name_type
= VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD
,
619 ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
622 ifr
.cmd
= DEL_VLAN_CMD
;
625 ifr
.cmd
= ADD_VLAN_CMD
;
628 strncpy(ifr
.device1
, dev
->ifname
, sizeof(ifr
.device1
));
629 return ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
632 int system_vlan_add(struct device
*dev
, int id
)
634 return system_vlan(dev
, id
);
637 int system_vlan_del(struct device
*dev
)
639 return system_vlan(dev
, -1);
643 system_if_get_settings(struct device
*dev
, struct device_settings
*s
)
647 memset(&ifr
, 0, sizeof(ifr
));
648 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
650 if (ioctl(sock_ioctl
, SIOCGIFMTU
, &ifr
) == 0) {
651 s
->mtu
= ifr
.ifr_mtu
;
652 s
->flags
|= DEV_OPT_MTU
;
655 if (ioctl(sock_ioctl
, SIOCGIFTXQLEN
, &ifr
) == 0) {
656 s
->txqueuelen
= ifr
.ifr_qlen
;
657 s
->flags
|= DEV_OPT_TXQUEUELEN
;
660 if (ioctl(sock_ioctl
, SIOCGIFHWADDR
, &ifr
) == 0) {
661 memcpy(s
->macaddr
, &ifr
.ifr_hwaddr
.sa_data
, sizeof(s
->macaddr
));
662 s
->flags
|= DEV_OPT_MACADDR
;
667 system_if_apply_settings(struct device
*dev
, struct device_settings
*s
)
671 memset(&ifr
, 0, sizeof(ifr
));
672 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
673 if (s
->flags
& DEV_OPT_MTU
) {
674 ifr
.ifr_mtu
= s
->mtu
;
675 if (ioctl(sock_ioctl
, SIOCSIFMTU
, &ifr
) < 0)
676 s
->flags
&= ~DEV_OPT_MTU
;
678 if (s
->flags
& DEV_OPT_TXQUEUELEN
) {
679 ifr
.ifr_qlen
= s
->txqueuelen
;
680 if (ioctl(sock_ioctl
, SIOCSIFTXQLEN
, &ifr
) < 0)
681 s
->flags
&= ~DEV_OPT_TXQUEUELEN
;
683 if ((s
->flags
& DEV_OPT_MACADDR
) && !dev
->external
) {
684 ifr
.ifr_hwaddr
.sa_family
= ARPHRD_ETHER
;
685 memcpy(&ifr
.ifr_hwaddr
.sa_data
, s
->macaddr
, sizeof(s
->macaddr
));
686 if (ioctl(sock_ioctl
, SIOCSIFHWADDR
, &ifr
) < 0)
687 s
->flags
&= ~DEV_OPT_MACADDR
;
691 int system_if_up(struct device
*dev
)
693 system_if_get_settings(dev
, &dev
->orig_settings
);
694 system_if_apply_settings(dev
, &dev
->settings
);
695 dev
->ifindex
= system_if_resolve(dev
);
696 return system_if_flags(dev
->ifname
, IFF_UP
, 0);
699 int system_if_down(struct device
*dev
)
701 int ret
= system_if_flags(dev
->ifname
, 0, IFF_UP
);
702 dev
->orig_settings
.flags
&= dev
->settings
.flags
;
703 system_if_apply_settings(dev
, &dev
->orig_settings
);
707 int system_if_check(struct device
*dev
)
709 device_set_present(dev
, (system_if_resolve(dev
) > 0));
714 system_if_get_parent(struct device
*dev
)
716 char buf
[64], *devname
;
717 int ifindex
, iflink
, len
;
720 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/iflink", dev
->ifname
);
725 len
= fread(buf
, 1, sizeof(buf
) - 1, f
);
732 iflink
= strtoul(buf
, NULL
, 0);
733 ifindex
= system_if_resolve(dev
);
734 if (!iflink
|| iflink
== ifindex
)
737 devname
= if_indextoname(iflink
, buf
);
741 return device_get(devname
, true);
745 read_string_file(int dir_fd
, const char *file
, char *buf
, int len
)
751 fd
= openat(dir_fd
, file
, O_RDONLY
);
756 len
= read(fd
, buf
, len
- 1);
760 } else if (len
> 0) {
763 c
= strchr(buf
, '\n');
776 read_uint64_file(int dir_fd
, const char *file
, uint64_t *val
)
781 ret
= read_string_file(dir_fd
, file
, buf
, sizeof(buf
));
783 *val
= strtoull(buf
, NULL
, 0);
788 /* Assume advertised flags == supported flags */
789 static const struct {
792 } ethtool_link_modes
[] = {
793 { ADVERTISED_10baseT_Half
, "10H" },
794 { ADVERTISED_10baseT_Full
, "10F" },
795 { ADVERTISED_100baseT_Half
, "100H" },
796 { ADVERTISED_100baseT_Full
, "100F" },
797 { ADVERTISED_1000baseT_Half
, "1000H" },
798 { ADVERTISED_1000baseT_Full
, "1000F" },
801 static void system_add_link_modes(struct blob_buf
*b
, __u32 mask
)
804 for (i
= 0; i
< ARRAY_SIZE(ethtool_link_modes
); i
++) {
805 if (mask
& ethtool_link_modes
[i
].mask
)
806 blobmsg_add_string(b
, NULL
, ethtool_link_modes
[i
].name
);
811 system_if_force_external(const char *ifname
)
816 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/phy80211", ifname
);
817 return stat(buf
, &s
) == 0;
821 system_if_dump_info(struct device
*dev
, struct blob_buf
*b
)
823 struct ethtool_cmd ecmd
;
830 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s", dev
->ifname
);
831 dir_fd
= open(buf
, O_DIRECTORY
);
833 if (read_uint64_file(dir_fd
, "carrier", &val
))
834 blobmsg_add_u8(b
, "link", !!val
);
836 memset(&ecmd
, 0, sizeof(ecmd
));
837 memset(&ifr
, 0, sizeof(ifr
));
838 strcpy(ifr
.ifr_name
, dev
->ifname
);
839 ifr
.ifr_data
= (caddr_t
) &ecmd
;
840 ecmd
.cmd
= ETHTOOL_GSET
;
842 if (ioctl(sock_ioctl
, SIOCETHTOOL
, &ifr
) == 0) {
843 c
= blobmsg_open_array(b
, "link-advertising");
844 system_add_link_modes(b
, ecmd
.advertising
);
845 blobmsg_close_array(b
, c
);
847 c
= blobmsg_open_array(b
, "link-supported");
848 system_add_link_modes(b
, ecmd
.supported
);
849 blobmsg_close_array(b
, c
);
851 s
= blobmsg_alloc_string_buffer(b
, "speed", 8);
852 snprintf(s
, 8, "%d%c", ethtool_cmd_speed(&ecmd
),
853 ecmd
.duplex
== DUPLEX_HALF
? 'H' : 'F');
854 blobmsg_add_string_buffer(b
);
862 system_if_dump_stats(struct device
*dev
, struct blob_buf
*b
)
864 const char *const counters
[] = {
865 "collisions", "rx_frame_errors", "tx_compressed",
866 "multicast", "rx_length_errors", "tx_dropped",
867 "rx_bytes", "rx_missed_errors", "tx_errors",
868 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
869 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
870 "rx_dropped", "tx_aborted_errors", "tx_packets",
871 "rx_errors", "tx_bytes", "tx_window_errors",
872 "rx_fifo_errors", "tx_carrier_errors",
879 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/statistics", dev
->ifname
);
880 stats_dir
= open(buf
, O_DIRECTORY
);
884 for (i
= 0; i
< ARRAY_SIZE(counters
); i
++)
885 if (read_uint64_file(stats_dir
, counters
[i
], &val
))
886 blobmsg_add_u64(b
, counters
[i
], val
);
892 static int system_addr(struct device
*dev
, struct device_addr
*addr
, int cmd
)
894 bool v4
= ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
);
895 int alen
= v4
? 4 : 16;
896 unsigned int flags
= 0;
897 struct ifaddrmsg ifa
= {
898 .ifa_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
899 .ifa_prefixlen
= addr
->mask
,
900 .ifa_index
= dev
->ifindex
,
904 if (cmd
== RTM_NEWADDR
)
905 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
907 msg
= nlmsg_alloc_simple(cmd
, flags
);
911 nlmsg_append(msg
, &ifa
, sizeof(ifa
), 0);
912 nla_put(msg
, IFA_LOCAL
, alen
, &addr
->addr
);
915 nla_put_u32(msg
, IFA_BROADCAST
, addr
->broadcast
);
916 if (addr
->point_to_point
)
917 nla_put_u32(msg
, IFA_ADDRESS
, addr
->point_to_point
);
919 time_t now
= system_get_rtime();
920 struct ifa_cacheinfo cinfo
= {0xffffffffU
, 0xffffffffU
, 0, 0};
922 if (addr
->preferred_until
) {
923 int preferred
= addr
->preferred_until
- now
;
927 cinfo
.ifa_prefered
= preferred
;
930 if (addr
->valid_until
) {
931 int valid
= addr
->valid_until
- now
;
935 cinfo
.ifa_valid
= valid
;
938 nla_put(msg
, IFA_CACHEINFO
, sizeof(cinfo
), &cinfo
);
941 return system_rtnl_call(msg
);
944 int system_add_address(struct device
*dev
, struct device_addr
*addr
)
946 return system_addr(dev
, addr
, RTM_NEWADDR
);
949 int system_del_address(struct device
*dev
, struct device_addr
*addr
)
951 return system_addr(dev
, addr
, RTM_DELADDR
);
954 static int system_rt(struct device
*dev
, struct device_route
*route
, int cmd
)
956 int alen
= ((route
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
) ? 4 : 16;
958 unsigned int flags
= 0;
961 have_gw
= !!route
->nexthop
.in
.s_addr
;
963 have_gw
= route
->nexthop
.in6
.s6_addr32
[0] ||
964 route
->nexthop
.in6
.s6_addr32
[1] ||
965 route
->nexthop
.in6
.s6_addr32
[2] ||
966 route
->nexthop
.in6
.s6_addr32
[3];
968 unsigned char scope
= (cmd
== RTM_DELROUTE
) ? RT_SCOPE_NOWHERE
:
969 (have_gw
) ? RT_SCOPE_UNIVERSE
: RT_SCOPE_LINK
;
971 unsigned int table
= (route
->flags
& (DEVROUTE_TABLE
| DEVROUTE_SRCTABLE
))
972 ? route
->table
: RT_TABLE_MAIN
;
975 .rtm_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
976 .rtm_dst_len
= route
->mask
,
977 .rtm_table
= (table
< 256) ? table
: RT_TABLE_UNSPEC
,
978 .rtm_protocol
= (route
->flags
& DEVADDR_KERNEL
) ? RTPROT_KERNEL
: RTPROT_STATIC
,
980 .rtm_type
= (cmd
== RTM_DELROUTE
) ? 0: RTN_UNICAST
,
984 if (cmd
== RTM_NEWROUTE
) {
985 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
987 if (!dev
) { // Add null-route
988 rtm
.rtm_scope
= RT_SCOPE_UNIVERSE
;
989 rtm
.rtm_type
= RTN_UNREACHABLE
;
993 msg
= nlmsg_alloc_simple(cmd
, flags
);
997 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
1000 nla_put(msg
, RTA_DST
, alen
, &route
->addr
);
1002 if (route
->metric
> 0)
1003 nla_put_u32(msg
, RTA_PRIORITY
, route
->metric
);
1006 nla_put(msg
, RTA_GATEWAY
, alen
, &route
->nexthop
);
1009 nla_put_u32(msg
, RTA_OIF
, dev
->ifindex
);
1012 nla_put_u32(msg
, RTA_TABLE
, table
);
1014 return system_rtnl_call(msg
);
1017 int system_add_route(struct device
*dev
, struct device_route
*route
)
1019 return system_rt(dev
, route
, RTM_NEWROUTE
);
1022 int system_del_route(struct device
*dev
, struct device_route
*route
)
1024 return system_rt(dev
, route
, RTM_DELROUTE
);
1027 int system_flush_routes(void)
1029 const char *names
[] = {
1030 "/proc/sys/net/ipv4/route/flush",
1031 "/proc/sys/net/ipv6/route/flush"
1035 for (i
= 0; i
< ARRAY_SIZE(names
); i
++) {
1036 fd
= open(names
[i
], O_WRONLY
);
1046 bool system_resolve_rt_table(const char *name
, unsigned int *id
)
1050 unsigned int n
, table
= RT_TABLE_UNSPEC
;
1052 /* first try to parse table as number */
1053 if ((n
= strtoul(name
, &e
, 0)) > 0 && !*e
)
1056 /* handle well known aliases */
1057 else if (!strcmp(name
, "default"))
1058 table
= RT_TABLE_DEFAULT
;
1059 else if (!strcmp(name
, "main"))
1060 table
= RT_TABLE_MAIN
;
1061 else if (!strcmp(name
, "local"))
1062 table
= RT_TABLE_LOCAL
;
1064 /* try to look up name in /etc/iproute2/rt_tables */
1065 else if ((f
= fopen("/etc/iproute2/rt_tables", "r")) != NULL
)
1067 while (fgets(buf
, sizeof(buf
) - 1, f
) != NULL
)
1069 if ((e
= strtok(buf
, " \t\n")) == NULL
|| *e
== '#')
1072 n
= strtoul(e
, NULL
, 10);
1073 e
= strtok(NULL
, " \t\n");
1075 if (e
&& !strcmp(e
, name
))
1085 if (table
== RT_TABLE_UNSPEC
)
1088 /* do not consider main table special */
1089 if (table
== RT_TABLE_MAIN
)
1090 table
= RT_TABLE_UNSPEC
;
1096 static int system_iprule(struct iprule
*rule
, int cmd
)
1098 int alen
= ((rule
->flags
& IPRULE_FAMILY
) == IPRULE_INET4
) ? 4 : 16;
1101 struct rtmsg rtm
= {
1102 .rtm_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1103 .rtm_protocol
= RTPROT_STATIC
,
1104 .rtm_scope
= RT_SCOPE_UNIVERSE
,
1105 .rtm_table
= RT_TABLE_UNSPEC
,
1106 .rtm_type
= RTN_UNSPEC
,
1110 if (cmd
== RTM_NEWRULE
) {
1111 rtm
.rtm_type
= RTN_UNICAST
;
1112 rtm
.rtm_flags
|= NLM_F_REPLACE
| NLM_F_EXCL
;
1116 rtm
.rtm_flags
|= FIB_RULE_INVERT
;
1118 if (rule
->flags
& IPRULE_SRC
)
1119 rtm
.rtm_src_len
= rule
->src_mask
;
1121 if (rule
->flags
& IPRULE_DEST
)
1122 rtm
.rtm_dst_len
= rule
->dest_mask
;
1124 if (rule
->flags
& IPRULE_TOS
)
1125 rtm
.rtm_tos
= rule
->tos
;
1127 if (rule
->flags
& IPRULE_LOOKUP
) {
1128 if (rule
->lookup
< 256)
1129 rtm
.rtm_table
= rule
->lookup
;
1132 if (rule
->flags
& IPRULE_ACTION
)
1133 rtm
.rtm_type
= rule
->action
;
1134 else if (rule
->flags
& IPRULE_GOTO
)
1135 rtm
.rtm_type
= FR_ACT_GOTO
;
1136 else if (!(rule
->flags
& (IPRULE_LOOKUP
| IPRULE_ACTION
| IPRULE_GOTO
)))
1137 rtm
.rtm_type
= FR_ACT_NOP
;
1139 msg
= nlmsg_alloc_simple(cmd
, NLM_F_REQUEST
);
1144 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
1146 if (rule
->flags
& IPRULE_IN
)
1147 nla_put(msg
, FRA_IFNAME
, strlen(rule
->in_dev
) + 1, rule
->in_dev
);
1149 if (rule
->flags
& IPRULE_OUT
)
1150 nla_put(msg
, FRA_OIFNAME
, strlen(rule
->out_dev
) + 1, rule
->out_dev
);
1152 if (rule
->flags
& IPRULE_SRC
)
1153 nla_put(msg
, FRA_SRC
, alen
, &rule
->src_addr
);
1155 if (rule
->flags
& IPRULE_DEST
)
1156 nla_put(msg
, FRA_DST
, alen
, &rule
->dest_addr
);
1158 if (rule
->flags
& IPRULE_PRIORITY
)
1159 nla_put_u32(msg
, FRA_PRIORITY
, rule
->priority
);
1160 else if (cmd
== RTM_NEWRULE
)
1161 nla_put_u32(msg
, FRA_PRIORITY
, rule
->order
);
1163 if (rule
->flags
& IPRULE_FWMARK
)
1164 nla_put_u32(msg
, FRA_FWMARK
, rule
->fwmark
);
1166 if (rule
->flags
& IPRULE_FWMASK
)
1167 nla_put_u32(msg
, FRA_FWMASK
, rule
->fwmask
);
1169 if (rule
->flags
& IPRULE_LOOKUP
) {
1170 if (rule
->lookup
>= 256)
1171 nla_put_u32(msg
, FRA_TABLE
, rule
->lookup
);
1174 if (rule
->flags
& IPRULE_GOTO
)
1175 nla_put_u32(msg
, FRA_GOTO
, rule
->gotoid
);
1177 return system_rtnl_call(msg
);
1180 int system_add_iprule(struct iprule
*rule
)
1182 /* trigger flush of existing rules when adding first rule the first time */
1183 if (!iprules_flushed
)
1185 system_flush_iprules();
1186 iprules_flushed
= true;
1189 return system_iprule(rule
, RTM_NEWRULE
);
1192 int system_del_iprule(struct iprule
*rule
)
1194 return system_iprule(rule
, RTM_DELRULE
);
1197 int system_flush_iprules(void)
1202 system_if_clear_entries(NULL
, RTM_GETRULE
, AF_INET
);
1203 system_if_clear_entries(NULL
, RTM_GETRULE
, AF_INET6
);
1205 memset(&rule
, 0, sizeof(rule
));
1208 rule
.flags
= IPRULE_INET4
| IPRULE_PRIORITY
| IPRULE_LOOKUP
;
1211 rule
.lookup
= RT_TABLE_LOCAL
;
1212 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1214 rule
.priority
= 32766;
1215 rule
.lookup
= RT_TABLE_MAIN
;
1216 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1218 rule
.priority
= 32767;
1219 rule
.lookup
= RT_TABLE_DEFAULT
;
1220 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1223 rule
.flags
= IPRULE_INET6
| IPRULE_PRIORITY
| IPRULE_LOOKUP
;
1226 rule
.lookup
= RT_TABLE_LOCAL
;
1227 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1229 rule
.priority
= 32766;
1230 rule
.lookup
= RT_TABLE_MAIN
;
1231 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1236 bool system_resolve_iprule_action(const char *action
, unsigned int *id
)
1241 if (!strcmp(action
, "local"))
1243 else if (!strcmp(action
, "nat"))
1245 else if (!strcmp(action
, "broadcast"))
1247 else if (!strcmp(action
, "anycast"))
1249 else if (!strcmp(action
, "multicast"))
1251 else if (!strcmp(action
, "prohibit"))
1253 else if (!strcmp(action
, "unreachable"))
1254 n
= RTN_UNREACHABLE
;
1255 else if (!strcmp(action
, "blackhole"))
1257 else if (!strcmp(action
, "xresolve"))
1259 else if (!strcmp(action
, "unicast"))
1261 else if (!strcmp(action
, "throw"))
1264 n
= strtoul(action
, &e
, 0);
1265 if (!e
|| *e
|| e
== action
|| n
> 255)
1273 time_t system_get_rtime(void)
1278 if (syscall(__NR_clock_gettime
, CLOCK_MONOTONIC
, &ts
) == 0)
1281 if (gettimeofday(&tv
, NULL
) == 0)
1288 #define IP_DF 0x4000
1291 static int tunnel_ioctl(const char *name
, int cmd
, void *p
)
1295 memset(&ifr
, 0, sizeof(ifr
));
1296 strncpy(ifr
.ifr_name
, name
, sizeof(ifr
.ifr_name
));
1297 ifr
.ifr_ifru
.ifru_data
= p
;
1298 return ioctl(sock_ioctl
, cmd
, &ifr
);
1301 int system_del_ip_tunnel(const char *name
)
1303 return tunnel_ioctl(name
, SIOCDELTUNNEL
, NULL
);
1306 int system_update_ipv6_mtu(struct device
*dev
, int mtu
)
1310 snprintf(buf
, sizeof(buf
), "/proc/sys/net/ipv6/conf/%s/mtu",
1313 int fd
= open(buf
, O_RDWR
);
1314 ssize_t len
= read(fd
, buf
, sizeof(buf
) - 1);
1321 if (!mtu
|| ret
<= mtu
)
1324 lseek(fd
, 0, SEEK_SET
);
1325 if (write(fd
, buf
, snprintf(buf
, sizeof(buf
), "%i", mtu
)) <= 0)
1334 int system_add_ip_tunnel(const char *name
, struct blob_attr
*attr
)
1336 struct blob_attr
*tb
[__TUNNEL_ATTR_MAX
];
1337 struct blob_attr
*cur
;
1340 system_del_ip_tunnel(name
);
1342 blobmsg_parse(tunnel_attr_list
.params
, __TUNNEL_ATTR_MAX
, tb
,
1343 blob_data(attr
), blob_len(attr
));
1345 if (!(cur
= tb
[TUNNEL_ATTR_TYPE
]))
1347 str
= blobmsg_data(cur
);
1349 unsigned int ttl
= 0;
1350 if ((cur
= tb
[TUNNEL_ATTR_TTL
]) && (ttl
= blobmsg_get_u32(cur
)) > 255)
1353 unsigned int link
= 0;
1354 if ((cur
= tb
[TUNNEL_ATTR_LINK
])) {
1355 struct interface
*iface
= vlist_find(&interfaces
, blobmsg_data(cur
), iface
, node
);
1359 if (iface
->l3_dev
.dev
)
1360 link
= iface
->l3_dev
.dev
->ifindex
;
1364 if (!strcmp(str
, "sit")) {
1365 struct ip_tunnel_parm p
= {
1370 .frag_off
= htons(IP_DF
),
1371 .protocol
= IPPROTO_IPV6
,
1376 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
]) &&
1377 inet_pton(AF_INET
, blobmsg_data(cur
), &p
.iph
.saddr
) < 1)
1380 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
]) &&
1381 inet_pton(AF_INET
, blobmsg_data(cur
), &p
.iph
.daddr
) < 1)
1384 strncpy(p
.name
, name
, sizeof(p
.name
));
1385 if (tunnel_ioctl("sit0", SIOCADDTUNNEL
, &p
) < 0)
1389 if ((cur
= tb
[TUNNEL_ATTR_6RD_PREFIX
])) {
1391 struct ip_tunnel_6rd p6
;
1393 memset(&p6
, 0, sizeof(p6
));
1395 if (!parse_ip_and_netmask(AF_INET6
, blobmsg_data(cur
),
1396 &p6
.prefix
, &mask
) || mask
> 128)
1398 p6
.prefixlen
= mask
;
1400 if ((cur
= tb
[TUNNEL_ATTR_6RD_RELAY_PREFIX
])) {
1401 if (!parse_ip_and_netmask(AF_INET
, blobmsg_data(cur
),
1402 &p6
.relay_prefix
, &mask
) || mask
> 32)
1404 p6
.relay_prefixlen
= mask
;
1407 if (tunnel_ioctl(name
, SIOCADD6RD
, &p6
) < 0) {
1408 system_del_ip_tunnel(name
);
1413 } else if (!strcmp(str
, "ipip6")) {
1414 struct ip6_tnl_parm p
= {
1416 .proto
= IPPROTO_IPIP
,
1417 .hop_limit
= (ttl
) ? ttl
: 64,
1421 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
]) &&
1422 inet_pton(AF_INET6
, blobmsg_data(cur
), &p
.laddr
) < 1)
1425 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
]) &&
1426 inet_pton(AF_INET6
, blobmsg_data(cur
), &p
.raddr
) < 1)
1429 strncpy(p
.name
, name
, sizeof(p
.name
));
1430 if (tunnel_ioctl("ip6tnl0", SIOCADDTUNNEL
, &p
) < 0)