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>
39 #ifndef RTN_FAILED_POLICY
40 #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
);
76 nl_recvmsgs(ev
->sock
, ev
->cb
);
79 static struct nl_sock
*
80 create_socket(int protocol
, int groups
)
84 sock
= nl_socket_alloc();
89 nl_join_groups(sock
, groups
);
91 if (nl_connect(sock
, protocol
))
98 create_raw_event_socket(struct event_socket
*ev
, int protocol
, int groups
,
101 ev
->sock
= create_socket(protocol
, groups
);
105 ev
->uloop
.fd
= nl_socket_get_fd(ev
->sock
);
107 uloop_fd_add(&ev
->uloop
, ULOOP_READ
| ULOOP_EDGE_TRIGGER
);
112 create_event_socket(struct event_socket
*ev
, int protocol
,
113 int (*cb
)(struct nl_msg
*msg
, void *arg
))
115 // Prepare socket for link events
116 ev
->cb
= nl_cb_alloc(NL_CB_DEFAULT
);
120 nl_cb_set(ev
->cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb
, NULL
);
122 return create_raw_event_socket(ev
, protocol
, 0, handler_nl_event
);
125 int system_init(void)
127 static struct event_socket rtnl_event
;
128 static struct event_socket hotplug_event
;
130 sock_ioctl
= socket(AF_LOCAL
, SOCK_DGRAM
, 0);
131 fcntl(sock_ioctl
, F_SETFD
, fcntl(sock_ioctl
, F_GETFD
) | FD_CLOEXEC
);
133 // Prepare socket for routing / address control
134 sock_rtnl
= create_socket(NETLINK_ROUTE
, 0);
138 if (!create_event_socket(&rtnl_event
, NETLINK_ROUTE
, cb_rtnl_event
))
141 if (!create_raw_event_socket(&hotplug_event
, NETLINK_KOBJECT_UEVENT
, 1,
142 handle_hotplug_event
))
145 // Receive network link events form kernel
146 nl_socket_add_membership(rtnl_event
.sock
, RTNLGRP_LINK
);
151 static void system_set_sysctl(const char *path
, const char *val
)
155 fd
= open(path
, O_WRONLY
);
159 write(fd
, val
, strlen(val
));
163 static void system_set_dev_sysctl(const char *path
, const char *device
, const char *val
)
165 snprintf(dev_buf
, sizeof(dev_buf
), path
, device
);
166 system_set_sysctl(dev_buf
, val
);
169 static void system_set_disable_ipv6(struct device
*dev
, const char *val
)
171 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev
->ifname
, val
);
174 // Evaluate netlink messages
175 static int cb_rtnl_event(struct nl_msg
*msg
, void *arg
)
177 struct nlmsghdr
*nh
= nlmsg_hdr(msg
);
178 struct ifinfomsg
*ifi
= NLMSG_DATA(nh
);
179 struct nlattr
*nla
[__IFLA_MAX
];
181 if (nh
->nlmsg_type
!= RTM_DELLINK
&& nh
->nlmsg_type
!= RTM_NEWLINK
)
184 nlmsg_parse(nh
, sizeof(*ifi
), nla
, __IFLA_MAX
- 1, NULL
);
185 if (!nla
[IFLA_IFNAME
])
188 struct device
*dev
= device_get(RTA_DATA(nla
[IFLA_IFNAME
]), false);
192 dev
->ifindex
= ifi
->ifi_index
;
193 /* TODO: parse link status */
200 handle_hotplug_msg(char *data
, int size
)
202 const char *subsystem
= NULL
, *interface
= NULL
;
203 char *cur
, *end
, *sep
;
208 if (!strncmp(data
, "add@", 4))
210 else if (!strncmp(data
, "remove@", 7))
215 skip
= strlen(data
) + 1;
218 for (cur
= data
+ skip
; cur
< end
; cur
+= skip
) {
219 skip
= strlen(cur
) + 1;
221 sep
= strchr(cur
, '=');
226 if (!strcmp(cur
, "INTERFACE"))
228 else if (!strcmp(cur
, "SUBSYSTEM")) {
230 if (strcmp(subsystem
, "net") != 0)
233 if (subsystem
&& interface
)
239 dev
= device_get(interface
, false);
243 if (dev
->type
!= &simple_device_type
)
246 if (add
&& system_if_force_external(dev
->ifname
))
249 device_set_present(dev
, add
);
253 handle_hotplug_event(struct uloop_fd
*u
, unsigned int events
)
255 struct event_socket
*ev
= container_of(u
, struct event_socket
, uloop
);
256 struct sockaddr_nl nla
;
257 unsigned char *buf
= NULL
;
260 while ((size
= nl_recv(ev
->sock
, &nla
, &buf
, NULL
)) > 0) {
262 handle_hotplug_msg((char *) buf
, size
);
268 static int system_rtnl_call(struct nl_msg
*msg
)
272 ret
= nl_send_auto_complete(sock_rtnl
, msg
);
278 return nl_wait_for_ack(sock_rtnl
);
281 int system_bridge_delbr(struct device
*bridge
)
283 return ioctl(sock_ioctl
, SIOCBRDELBR
, bridge
->ifname
);
286 static int system_bridge_if(const char *bridge
, struct device
*dev
, int cmd
, void *data
)
290 memset(&ifr
, 0, sizeof(ifr
));
292 ifr
.ifr_ifindex
= dev
->ifindex
;
295 strncpy(ifr
.ifr_name
, bridge
, sizeof(ifr
.ifr_name
));
296 return ioctl(sock_ioctl
, cmd
, &ifr
);
299 static bool system_is_bridge(const char *name
, char *buf
, int buflen
)
303 snprintf(buf
, buflen
, "/sys/devices/virtual/net/%s/bridge", name
);
304 if (stat(buf
, &st
) < 0)
310 static char *system_get_bridge(const char *name
, char *buf
, int buflen
)
316 snprintf(buf
, buflen
, "/sys/devices/virtual/net/*/brif/%s/bridge", name
);
317 if (glob(buf
, GLOB_NOSORT
, NULL
, &gl
) < 0)
320 if (gl
.gl_pathc
== 0)
323 len
= readlink(gl
.gl_pathv
[0], buf
, buflen
);
328 path
= strrchr(buf
, '/');
335 int system_bridge_addif(struct device
*bridge
, struct device
*dev
)
339 system_set_disable_ipv6(dev
, "1");
340 oldbr
= system_get_bridge(dev
->ifname
, dev_buf
, sizeof(dev_buf
));
341 if (oldbr
&& !strcmp(oldbr
, bridge
->ifname
))
344 return system_bridge_if(bridge
->ifname
, dev
, SIOCBRADDIF
, NULL
);
347 int system_bridge_delif(struct device
*bridge
, struct device
*dev
)
349 system_set_disable_ipv6(dev
, "0");
350 return system_bridge_if(bridge
->ifname
, dev
, SIOCBRDELIF
, NULL
);
353 static int system_if_resolve(struct device
*dev
)
356 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
357 if (!ioctl(sock_ioctl
, SIOCGIFINDEX
, &ifr
))
358 return ifr
.ifr_ifindex
;
363 static int system_if_flags(const char *ifname
, unsigned add
, unsigned rem
)
367 memset(&ifr
, 0, sizeof(ifr
));
368 strncpy(ifr
.ifr_name
, ifname
, sizeof(ifr
.ifr_name
));
369 ioctl(sock_ioctl
, SIOCGIFFLAGS
, &ifr
);
370 ifr
.ifr_flags
|= add
;
371 ifr
.ifr_flags
&= ~rem
;
372 return ioctl(sock_ioctl
, SIOCSIFFLAGS
, &ifr
);
384 static bool check_ifaddr(struct nlmsghdr
*hdr
, int ifindex
)
386 struct ifaddrmsg
*ifa
= NLMSG_DATA(hdr
);
388 return ifa
->ifa_index
== ifindex
;
391 static bool check_route(struct nlmsghdr
*hdr
, int ifindex
)
393 struct rtmsg
*r
= NLMSG_DATA(hdr
);
394 struct nlattr
*tb
[__RTA_MAX
];
396 if (r
->rtm_protocol
== RTPROT_KERNEL
&&
397 r
->rtm_family
== AF_INET6
)
400 nlmsg_parse(hdr
, sizeof(struct rtmsg
), tb
, __RTA_MAX
- 1, NULL
);
404 return *(int *)RTA_DATA(tb
[RTA_OIF
]) == ifindex
;
407 static bool check_rule(struct nlmsghdr
*hdr
, int ifindex
)
412 static int cb_clear_event(struct nl_msg
*msg
, void *arg
)
414 struct clear_data
*clr
= arg
;
415 struct nlmsghdr
*hdr
= nlmsg_hdr(msg
);
416 bool (*cb
)(struct nlmsghdr
*, int ifindex
);
422 if (hdr
->nlmsg_type
!= RTM_NEWADDR
)
429 if (hdr
->nlmsg_type
!= RTM_NEWROUTE
)
436 if (hdr
->nlmsg_type
!= RTM_NEWRULE
)
445 if (!cb(hdr
, clr
->dev
? clr
->dev
->ifindex
: 0))
448 if (type
== RTM_DELRULE
)
449 D(SYSTEM
, "Remove a rule\n");
451 D(SYSTEM
, "Remove %s from device %s\n",
452 type
== RTM_DELADDR
? "an address" : "a route",
454 memcpy(nlmsg_hdr(clr
->msg
), hdr
, hdr
->nlmsg_len
);
455 hdr
= nlmsg_hdr(clr
->msg
);
456 hdr
->nlmsg_type
= type
;
457 hdr
->nlmsg_flags
= NLM_F_REQUEST
;
459 if (!nl_send_auto_complete(sock_rtnl
, clr
->msg
))
460 nl_wait_for_ack(sock_rtnl
);
466 cb_finish_event(struct nl_msg
*msg
, void *arg
)
474 error_handler(struct sockaddr_nl
*nla
, struct nlmsgerr
*err
, void *arg
)
477 *pending
= err
->error
;
482 system_if_clear_entries(struct device
*dev
, int type
, int af
)
484 struct clear_data clr
;
485 struct nl_cb
*cb
= nl_cb_alloc(NL_CB_DEFAULT
);
488 .rtm_flags
= RTM_F_CLONED
,
490 int flags
= NLM_F_DUMP
;
499 clr
.size
= sizeof(struct rtgenmsg
);
502 clr
.size
= sizeof(struct rtmsg
);
511 clr
.msg
= nlmsg_alloc_simple(type
, flags
);
515 nlmsg_append(clr
.msg
, &rtm
, clr
.size
, 0);
516 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb_clear_event
, &clr
);
517 nl_cb_set(cb
, NL_CB_FINISH
, NL_CB_CUSTOM
, cb_finish_event
, &pending
);
518 nl_cb_err(cb
, NL_CB_CUSTOM
, error_handler
, &pending
);
520 nl_send_auto_complete(sock_rtnl
, clr
.msg
);
522 nl_recvmsgs(sock_rtnl
, cb
);
530 * Clear bridge (membership) state and bring down device
532 void system_if_clear_state(struct device
*dev
)
534 static char buf
[256];
540 dev
->ifindex
= system_if_resolve(dev
);
544 system_if_flags(dev
->ifname
, 0, IFF_UP
);
546 if (system_is_bridge(dev
->ifname
, buf
, sizeof(buf
))) {
547 D(SYSTEM
, "Delete existing bridge named '%s'\n", dev
->ifname
);
548 system_bridge_delbr(dev
);
552 bridge
= system_get_bridge(dev
->ifname
, buf
, sizeof(buf
));
554 D(SYSTEM
, "Remove device '%s' from bridge '%s'\n", dev
->ifname
, bridge
);
555 system_bridge_if(bridge
, dev
, SIOCBRDELIF
, NULL
);
558 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET
);
559 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET
);
560 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET6
);
561 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET6
);
562 system_set_disable_ipv6(dev
, "0");
565 static inline unsigned long
566 sec_to_jiffies(int val
)
568 return (unsigned long) val
* 100;
571 int system_bridge_addbr(struct device
*bridge
, struct bridge_config
*cfg
)
573 unsigned long args
[4] = {};
575 if (ioctl(sock_ioctl
, SIOCBRADDBR
, bridge
->ifname
) < 0)
578 args
[0] = BRCTL_SET_BRIDGE_STP_STATE
;
579 args
[1] = !!cfg
->stp
;
580 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
582 args
[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY
;
583 args
[1] = sec_to_jiffies(cfg
->forward_delay
);
584 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
586 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
587 bridge
->ifname
, cfg
->igmp_snoop
? "1" : "0");
589 args
[0] = BRCTL_SET_BRIDGE_PRIORITY
;
590 args
[1] = cfg
->priority
;
591 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
593 if (cfg
->flags
& BRIDGE_OPT_AGEING_TIME
) {
594 args
[0] = BRCTL_SET_AGEING_TIME
;
595 args
[1] = sec_to_jiffies(cfg
->ageing_time
);
596 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
599 if (cfg
->flags
& BRIDGE_OPT_HELLO_TIME
) {
600 args
[0] = BRCTL_SET_BRIDGE_HELLO_TIME
;
601 args
[1] = sec_to_jiffies(cfg
->hello_time
);
602 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
605 if (cfg
->flags
& BRIDGE_OPT_MAX_AGE
) {
606 args
[0] = BRCTL_SET_BRIDGE_MAX_AGE
;
607 args
[1] = sec_to_jiffies(cfg
->max_age
);
608 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
614 static int system_vlan(struct device
*dev
, int id
)
616 struct vlan_ioctl_args ifr
= {
617 .cmd
= SET_VLAN_NAME_TYPE_CMD
,
618 .u
.name_type
= VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD
,
621 ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
624 ifr
.cmd
= DEL_VLAN_CMD
;
627 ifr
.cmd
= ADD_VLAN_CMD
;
630 strncpy(ifr
.device1
, dev
->ifname
, sizeof(ifr
.device1
));
631 return ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
634 int system_vlan_add(struct device
*dev
, int id
)
636 return system_vlan(dev
, id
);
639 int system_vlan_del(struct device
*dev
)
641 return system_vlan(dev
, -1);
645 system_if_get_settings(struct device
*dev
, struct device_settings
*s
)
649 memset(&ifr
, 0, sizeof(ifr
));
650 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
652 if (ioctl(sock_ioctl
, SIOCGIFMTU
, &ifr
) == 0) {
653 s
->mtu
= ifr
.ifr_mtu
;
654 s
->flags
|= DEV_OPT_MTU
;
657 if (ioctl(sock_ioctl
, SIOCGIFTXQLEN
, &ifr
) == 0) {
658 s
->txqueuelen
= ifr
.ifr_qlen
;
659 s
->flags
|= DEV_OPT_TXQUEUELEN
;
662 if (ioctl(sock_ioctl
, SIOCGIFHWADDR
, &ifr
) == 0) {
663 memcpy(s
->macaddr
, &ifr
.ifr_hwaddr
.sa_data
, sizeof(s
->macaddr
));
664 s
->flags
|= DEV_OPT_MACADDR
;
669 system_if_apply_settings(struct device
*dev
, struct device_settings
*s
)
673 memset(&ifr
, 0, sizeof(ifr
));
674 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
675 if (s
->flags
& DEV_OPT_MTU
) {
676 ifr
.ifr_mtu
= s
->mtu
;
677 if (ioctl(sock_ioctl
, SIOCSIFMTU
, &ifr
) < 0)
678 s
->flags
&= ~DEV_OPT_MTU
;
680 if (s
->flags
& DEV_OPT_TXQUEUELEN
) {
681 ifr
.ifr_qlen
= s
->txqueuelen
;
682 if (ioctl(sock_ioctl
, SIOCSIFTXQLEN
, &ifr
) < 0)
683 s
->flags
&= ~DEV_OPT_TXQUEUELEN
;
685 if ((s
->flags
& DEV_OPT_MACADDR
) && !dev
->external
) {
686 ifr
.ifr_hwaddr
.sa_family
= ARPHRD_ETHER
;
687 memcpy(&ifr
.ifr_hwaddr
.sa_data
, s
->macaddr
, sizeof(s
->macaddr
));
688 if (ioctl(sock_ioctl
, SIOCSIFHWADDR
, &ifr
) < 0)
689 s
->flags
&= ~DEV_OPT_MACADDR
;
693 int system_if_up(struct device
*dev
)
695 system_if_get_settings(dev
, &dev
->orig_settings
);
696 system_if_apply_settings(dev
, &dev
->settings
);
697 dev
->ifindex
= system_if_resolve(dev
);
698 return system_if_flags(dev
->ifname
, IFF_UP
, 0);
701 int system_if_down(struct device
*dev
)
703 int ret
= system_if_flags(dev
->ifname
, 0, IFF_UP
);
704 dev
->orig_settings
.flags
&= dev
->settings
.flags
;
705 system_if_apply_settings(dev
, &dev
->orig_settings
);
709 int system_if_check(struct device
*dev
)
711 device_set_present(dev
, (system_if_resolve(dev
) > 0));
716 system_if_get_parent(struct device
*dev
)
718 char buf
[64], *devname
;
719 int ifindex
, iflink
, len
;
722 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/iflink", dev
->ifname
);
727 len
= fread(buf
, 1, sizeof(buf
) - 1, f
);
734 iflink
= strtoul(buf
, NULL
, 0);
735 ifindex
= system_if_resolve(dev
);
736 if (!iflink
|| iflink
== ifindex
)
739 devname
= if_indextoname(iflink
, buf
);
743 return device_get(devname
, true);
747 read_string_file(int dir_fd
, const char *file
, char *buf
, int len
)
753 fd
= openat(dir_fd
, file
, O_RDONLY
);
758 len
= read(fd
, buf
, len
- 1);
762 } else if (len
> 0) {
765 c
= strchr(buf
, '\n');
778 read_uint64_file(int dir_fd
, const char *file
, uint64_t *val
)
783 ret
= read_string_file(dir_fd
, file
, buf
, sizeof(buf
));
785 *val
= strtoull(buf
, NULL
, 0);
790 /* Assume advertised flags == supported flags */
791 static const struct {
794 } ethtool_link_modes
[] = {
795 { ADVERTISED_10baseT_Half
, "10H" },
796 { ADVERTISED_10baseT_Full
, "10F" },
797 { ADVERTISED_100baseT_Half
, "100H" },
798 { ADVERTISED_100baseT_Full
, "100F" },
799 { ADVERTISED_1000baseT_Half
, "1000H" },
800 { ADVERTISED_1000baseT_Full
, "1000F" },
803 static void system_add_link_modes(struct blob_buf
*b
, __u32 mask
)
806 for (i
= 0; i
< ARRAY_SIZE(ethtool_link_modes
); i
++) {
807 if (mask
& ethtool_link_modes
[i
].mask
)
808 blobmsg_add_string(b
, NULL
, ethtool_link_modes
[i
].name
);
813 system_if_force_external(const char *ifname
)
818 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/phy80211", ifname
);
819 return stat(buf
, &s
) == 0;
823 system_if_dump_info(struct device
*dev
, struct blob_buf
*b
)
825 struct ethtool_cmd ecmd
;
832 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s", dev
->ifname
);
833 dir_fd
= open(buf
, O_DIRECTORY
);
835 if (read_uint64_file(dir_fd
, "carrier", &val
))
836 blobmsg_add_u8(b
, "link", !!val
);
838 memset(&ecmd
, 0, sizeof(ecmd
));
839 memset(&ifr
, 0, sizeof(ifr
));
840 strcpy(ifr
.ifr_name
, dev
->ifname
);
841 ifr
.ifr_data
= (caddr_t
) &ecmd
;
842 ecmd
.cmd
= ETHTOOL_GSET
;
844 if (ioctl(sock_ioctl
, SIOCETHTOOL
, &ifr
) == 0) {
845 c
= blobmsg_open_array(b
, "link-advertising");
846 system_add_link_modes(b
, ecmd
.advertising
);
847 blobmsg_close_array(b
, c
);
849 c
= blobmsg_open_array(b
, "link-supported");
850 system_add_link_modes(b
, ecmd
.supported
);
851 blobmsg_close_array(b
, c
);
853 s
= blobmsg_alloc_string_buffer(b
, "speed", 8);
854 snprintf(s
, 8, "%d%c", ethtool_cmd_speed(&ecmd
),
855 ecmd
.duplex
== DUPLEX_HALF
? 'H' : 'F');
856 blobmsg_add_string_buffer(b
);
864 system_if_dump_stats(struct device
*dev
, struct blob_buf
*b
)
866 const char *const counters
[] = {
867 "collisions", "rx_frame_errors", "tx_compressed",
868 "multicast", "rx_length_errors", "tx_dropped",
869 "rx_bytes", "rx_missed_errors", "tx_errors",
870 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
871 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
872 "rx_dropped", "tx_aborted_errors", "tx_packets",
873 "rx_errors", "tx_bytes", "tx_window_errors",
874 "rx_fifo_errors", "tx_carrier_errors",
881 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/statistics", dev
->ifname
);
882 stats_dir
= open(buf
, O_DIRECTORY
);
886 for (i
= 0; i
< ARRAY_SIZE(counters
); i
++)
887 if (read_uint64_file(stats_dir
, counters
[i
], &val
))
888 blobmsg_add_u64(b
, counters
[i
], val
);
894 static int system_addr(struct device
*dev
, struct device_addr
*addr
, int cmd
)
896 bool v4
= ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
);
897 int alen
= v4
? 4 : 16;
898 unsigned int flags
= 0;
899 struct ifaddrmsg ifa
= {
900 .ifa_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
901 .ifa_prefixlen
= addr
->mask
,
902 .ifa_index
= dev
->ifindex
,
906 if (cmd
== RTM_NEWADDR
)
907 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
909 msg
= nlmsg_alloc_simple(cmd
, flags
);
913 nlmsg_append(msg
, &ifa
, sizeof(ifa
), 0);
914 nla_put(msg
, IFA_LOCAL
, alen
, &addr
->addr
);
917 nla_put_u32(msg
, IFA_BROADCAST
, addr
->broadcast
);
918 if (addr
->point_to_point
)
919 nla_put_u32(msg
, IFA_ADDRESS
, addr
->point_to_point
);
921 time_t now
= system_get_rtime();
922 struct ifa_cacheinfo cinfo
= {0xffffffffU
, 0xffffffffU
, 0, 0};
924 if (addr
->preferred_until
) {
925 int64_t preferred
= addr
->preferred_until
- now
;
928 else if (preferred
> UINT32_MAX
)
929 preferred
= UINT32_MAX
;
931 cinfo
.ifa_prefered
= preferred
;
934 if (addr
->valid_until
) {
935 int64_t valid
= addr
->valid_until
- now
;
938 else if (valid
> UINT32_MAX
)
941 cinfo
.ifa_valid
= valid
;
944 nla_put(msg
, IFA_CACHEINFO
, sizeof(cinfo
), &cinfo
);
947 return system_rtnl_call(msg
);
950 int system_add_address(struct device
*dev
, struct device_addr
*addr
)
952 return system_addr(dev
, addr
, RTM_NEWADDR
);
955 int system_del_address(struct device
*dev
, struct device_addr
*addr
)
957 return system_addr(dev
, addr
, RTM_DELADDR
);
960 static int system_rt(struct device
*dev
, struct device_route
*route
, int cmd
)
962 int alen
= ((route
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
) ? 4 : 16;
964 unsigned int flags
= 0;
967 have_gw
= !!route
->nexthop
.in
.s_addr
;
969 have_gw
= route
->nexthop
.in6
.s6_addr32
[0] ||
970 route
->nexthop
.in6
.s6_addr32
[1] ||
971 route
->nexthop
.in6
.s6_addr32
[2] ||
972 route
->nexthop
.in6
.s6_addr32
[3];
974 unsigned char scope
= (cmd
== RTM_DELROUTE
) ? RT_SCOPE_NOWHERE
:
975 (have_gw
) ? RT_SCOPE_UNIVERSE
: RT_SCOPE_LINK
;
977 unsigned int table
= (route
->flags
& (DEVROUTE_TABLE
| DEVROUTE_SRCTABLE
))
978 ? route
->table
: RT_TABLE_MAIN
;
981 .rtm_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
982 .rtm_dst_len
= route
->mask
,
983 .rtm_table
= (table
< 256) ? table
: RT_TABLE_UNSPEC
,
984 .rtm_protocol
= (route
->flags
& DEVADDR_KERNEL
) ? RTPROT_KERNEL
: RTPROT_STATIC
,
986 .rtm_type
= (cmd
== RTM_DELROUTE
) ? 0: RTN_UNICAST
,
990 if (cmd
== RTM_NEWROUTE
) {
991 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
993 if (!dev
) { // Add null-route
994 rtm
.rtm_scope
= RT_SCOPE_UNIVERSE
;
995 rtm
.rtm_type
= RTN_UNREACHABLE
;
999 msg
= nlmsg_alloc_simple(cmd
, flags
);
1003 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
1006 nla_put(msg
, RTA_DST
, alen
, &route
->addr
);
1008 if (route
->metric
> 0)
1009 nla_put_u32(msg
, RTA_PRIORITY
, route
->metric
);
1012 nla_put(msg
, RTA_GATEWAY
, alen
, &route
->nexthop
);
1015 nla_put_u32(msg
, RTA_OIF
, dev
->ifindex
);
1018 nla_put_u32(msg
, RTA_TABLE
, table
);
1020 return system_rtnl_call(msg
);
1023 int system_add_route(struct device
*dev
, struct device_route
*route
)
1025 return system_rt(dev
, route
, RTM_NEWROUTE
);
1028 int system_del_route(struct device
*dev
, struct device_route
*route
)
1030 return system_rt(dev
, route
, RTM_DELROUTE
);
1033 int system_flush_routes(void)
1035 const char *names
[] = {
1036 "/proc/sys/net/ipv4/route/flush",
1037 "/proc/sys/net/ipv6/route/flush"
1041 for (i
= 0; i
< ARRAY_SIZE(names
); i
++) {
1042 fd
= open(names
[i
], O_WRONLY
);
1052 bool system_resolve_rt_table(const char *name
, unsigned int *id
)
1056 unsigned int n
, table
= RT_TABLE_UNSPEC
;
1058 /* first try to parse table as number */
1059 if ((n
= strtoul(name
, &e
, 0)) > 0 && !*e
)
1062 /* handle well known aliases */
1063 else if (!strcmp(name
, "default"))
1064 table
= RT_TABLE_DEFAULT
;
1065 else if (!strcmp(name
, "main"))
1066 table
= RT_TABLE_MAIN
;
1067 else if (!strcmp(name
, "local"))
1068 table
= RT_TABLE_LOCAL
;
1070 /* try to look up name in /etc/iproute2/rt_tables */
1071 else if ((f
= fopen("/etc/iproute2/rt_tables", "r")) != NULL
)
1073 while (fgets(buf
, sizeof(buf
) - 1, f
) != NULL
)
1075 if ((e
= strtok(buf
, " \t\n")) == NULL
|| *e
== '#')
1078 n
= strtoul(e
, NULL
, 10);
1079 e
= strtok(NULL
, " \t\n");
1081 if (e
&& !strcmp(e
, name
))
1091 if (table
== RT_TABLE_UNSPEC
)
1094 /* do not consider main table special */
1095 if (table
== RT_TABLE_MAIN
)
1096 table
= RT_TABLE_UNSPEC
;
1102 static int system_iprule(struct iprule
*rule
, int cmd
)
1104 int alen
= ((rule
->flags
& IPRULE_FAMILY
) == IPRULE_INET4
) ? 4 : 16;
1107 struct rtmsg rtm
= {
1108 .rtm_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1109 .rtm_protocol
= RTPROT_STATIC
,
1110 .rtm_scope
= RT_SCOPE_UNIVERSE
,
1111 .rtm_table
= RT_TABLE_UNSPEC
,
1112 .rtm_type
= RTN_UNSPEC
,
1116 if (cmd
== RTM_NEWRULE
) {
1117 rtm
.rtm_type
= RTN_UNICAST
;
1118 rtm
.rtm_flags
|= NLM_F_REPLACE
| NLM_F_EXCL
;
1122 rtm
.rtm_flags
|= FIB_RULE_INVERT
;
1124 if (rule
->flags
& IPRULE_SRC
)
1125 rtm
.rtm_src_len
= rule
->src_mask
;
1127 if (rule
->flags
& IPRULE_DEST
)
1128 rtm
.rtm_dst_len
= rule
->dest_mask
;
1130 if (rule
->flags
& IPRULE_TOS
)
1131 rtm
.rtm_tos
= rule
->tos
;
1133 if (rule
->flags
& IPRULE_LOOKUP
) {
1134 if (rule
->lookup
< 256)
1135 rtm
.rtm_table
= rule
->lookup
;
1138 if (rule
->flags
& IPRULE_ACTION
)
1139 rtm
.rtm_type
= rule
->action
;
1140 else if (rule
->flags
& IPRULE_GOTO
)
1141 rtm
.rtm_type
= FR_ACT_GOTO
;
1142 else if (!(rule
->flags
& (IPRULE_LOOKUP
| IPRULE_ACTION
| IPRULE_GOTO
)))
1143 rtm
.rtm_type
= FR_ACT_NOP
;
1145 msg
= nlmsg_alloc_simple(cmd
, NLM_F_REQUEST
);
1150 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
1152 if (rule
->flags
& IPRULE_IN
)
1153 nla_put(msg
, FRA_IFNAME
, strlen(rule
->in_dev
) + 1, rule
->in_dev
);
1155 if (rule
->flags
& IPRULE_OUT
)
1156 nla_put(msg
, FRA_OIFNAME
, strlen(rule
->out_dev
) + 1, rule
->out_dev
);
1158 if (rule
->flags
& IPRULE_SRC
)
1159 nla_put(msg
, FRA_SRC
, alen
, &rule
->src_addr
);
1161 if (rule
->flags
& IPRULE_DEST
)
1162 nla_put(msg
, FRA_DST
, alen
, &rule
->dest_addr
);
1164 if (rule
->flags
& IPRULE_PRIORITY
)
1165 nla_put_u32(msg
, FRA_PRIORITY
, rule
->priority
);
1166 else if (cmd
== RTM_NEWRULE
)
1167 nla_put_u32(msg
, FRA_PRIORITY
, rule
->order
);
1169 if (rule
->flags
& IPRULE_FWMARK
)
1170 nla_put_u32(msg
, FRA_FWMARK
, rule
->fwmark
);
1172 if (rule
->flags
& IPRULE_FWMASK
)
1173 nla_put_u32(msg
, FRA_FWMASK
, rule
->fwmask
);
1175 if (rule
->flags
& IPRULE_LOOKUP
) {
1176 if (rule
->lookup
>= 256)
1177 nla_put_u32(msg
, FRA_TABLE
, rule
->lookup
);
1180 if (rule
->flags
& IPRULE_GOTO
)
1181 nla_put_u32(msg
, FRA_GOTO
, rule
->gotoid
);
1183 return system_rtnl_call(msg
);
1186 int system_add_iprule(struct iprule
*rule
)
1188 return system_iprule(rule
, RTM_NEWRULE
);
1191 int system_del_iprule(struct iprule
*rule
)
1193 return system_iprule(rule
, RTM_DELRULE
);
1196 int system_flush_iprules(void)
1201 system_if_clear_entries(NULL
, RTM_GETRULE
, AF_INET
);
1202 system_if_clear_entries(NULL
, RTM_GETRULE
, AF_INET6
);
1204 memset(&rule
, 0, sizeof(rule
));
1207 rule
.flags
= IPRULE_INET4
| IPRULE_PRIORITY
| IPRULE_LOOKUP
;
1210 rule
.lookup
= RT_TABLE_LOCAL
;
1211 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1213 rule
.priority
= 32766;
1214 rule
.lookup
= RT_TABLE_MAIN
;
1215 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1217 rule
.priority
= 32767;
1218 rule
.lookup
= RT_TABLE_DEFAULT
;
1219 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1222 rule
.flags
= IPRULE_INET6
| IPRULE_PRIORITY
| IPRULE_LOOKUP
;
1225 rule
.lookup
= RT_TABLE_LOCAL
;
1226 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1228 rule
.priority
= 32766;
1229 rule
.lookup
= RT_TABLE_MAIN
;
1230 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1235 bool system_resolve_iprule_action(const char *action
, unsigned int *id
)
1240 if (!strcmp(action
, "local"))
1242 else if (!strcmp(action
, "nat"))
1244 else if (!strcmp(action
, "broadcast"))
1246 else if (!strcmp(action
, "anycast"))
1248 else if (!strcmp(action
, "multicast"))
1250 else if (!strcmp(action
, "prohibit"))
1252 else if (!strcmp(action
, "unreachable"))
1253 n
= RTN_UNREACHABLE
;
1254 else if (!strcmp(action
, "blackhole"))
1256 else if (!strcmp(action
, "xresolve"))
1258 else if (!strcmp(action
, "unicast"))
1260 else if (!strcmp(action
, "throw"))
1262 else if (!strcmp(action
, "failed_policy"))
1263 n
= RTN_FAILED_POLICY
;
1265 n
= strtoul(action
, &e
, 0);
1266 if (!e
|| *e
|| e
== action
|| n
> 255)
1274 time_t system_get_rtime(void)
1279 if (syscall(__NR_clock_gettime
, CLOCK_MONOTONIC
, &ts
) == 0)
1282 if (gettimeofday(&tv
, NULL
) == 0)
1289 #define IP_DF 0x4000
1292 static int tunnel_ioctl(const char *name
, int cmd
, void *p
)
1296 memset(&ifr
, 0, sizeof(ifr
));
1297 strncpy(ifr
.ifr_name
, name
, sizeof(ifr
.ifr_name
));
1298 ifr
.ifr_ifru
.ifru_data
= p
;
1299 return ioctl(sock_ioctl
, cmd
, &ifr
);
1302 int system_del_ip_tunnel(const char *name
)
1304 return tunnel_ioctl(name
, SIOCDELTUNNEL
, NULL
);
1307 int system_update_ipv6_mtu(struct device
*dev
, int mtu
)
1311 snprintf(buf
, sizeof(buf
), "/proc/sys/net/ipv6/conf/%s/mtu",
1314 int fd
= open(buf
, O_RDWR
);
1315 ssize_t len
= read(fd
, buf
, sizeof(buf
) - 1);
1322 if (!mtu
|| ret
<= mtu
)
1325 lseek(fd
, 0, SEEK_SET
);
1326 if (write(fd
, buf
, snprintf(buf
, sizeof(buf
), "%i", mtu
)) <= 0)
1335 int system_add_ip_tunnel(const char *name
, struct blob_attr
*attr
)
1337 struct blob_attr
*tb
[__TUNNEL_ATTR_MAX
];
1338 struct blob_attr
*cur
;
1341 system_del_ip_tunnel(name
);
1343 blobmsg_parse(tunnel_attr_list
.params
, __TUNNEL_ATTR_MAX
, tb
,
1344 blob_data(attr
), blob_len(attr
));
1346 if (!(cur
= tb
[TUNNEL_ATTR_TYPE
]))
1348 str
= blobmsg_data(cur
);
1350 unsigned int ttl
= 0;
1351 if ((cur
= tb
[TUNNEL_ATTR_TTL
]) && (ttl
= blobmsg_get_u32(cur
)) > 255)
1354 unsigned int link
= 0;
1355 if ((cur
= tb
[TUNNEL_ATTR_LINK
])) {
1356 struct interface
*iface
= vlist_find(&interfaces
, blobmsg_data(cur
), iface
, node
);
1360 if (iface
->l3_dev
.dev
)
1361 link
= iface
->l3_dev
.dev
->ifindex
;
1365 if (!strcmp(str
, "sit")) {
1366 struct ip_tunnel_parm p
= {
1371 .frag_off
= htons(IP_DF
),
1372 .protocol
= IPPROTO_IPV6
,
1377 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
]) &&
1378 inet_pton(AF_INET
, blobmsg_data(cur
), &p
.iph
.saddr
) < 1)
1381 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
]) &&
1382 inet_pton(AF_INET
, blobmsg_data(cur
), &p
.iph
.daddr
) < 1)
1385 strncpy(p
.name
, name
, sizeof(p
.name
));
1386 if (tunnel_ioctl("sit0", SIOCADDTUNNEL
, &p
) < 0)
1390 if ((cur
= tb
[TUNNEL_ATTR_6RD_PREFIX
])) {
1392 struct ip_tunnel_6rd p6
;
1394 memset(&p6
, 0, sizeof(p6
));
1396 if (!parse_ip_and_netmask(AF_INET6
, blobmsg_data(cur
),
1397 &p6
.prefix
, &mask
) || mask
> 128)
1399 p6
.prefixlen
= mask
;
1401 if ((cur
= tb
[TUNNEL_ATTR_6RD_RELAY_PREFIX
])) {
1402 if (!parse_ip_and_netmask(AF_INET
, blobmsg_data(cur
),
1403 &p6
.relay_prefix
, &mask
) || mask
> 32)
1405 p6
.relay_prefixlen
= mask
;
1408 if (tunnel_ioctl(name
, SIOCADD6RD
, &p6
) < 0) {
1409 system_del_ip_tunnel(name
);
1414 } else if (!strcmp(str
, "ipip6")) {
1415 struct ip6_tnl_parm p
= {
1417 .proto
= IPPROTO_IPIP
,
1418 .hop_limit
= (ttl
) ? ttl
: 64,
1422 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
]) &&
1423 inet_pton(AF_INET6
, blobmsg_data(cur
), &p
.laddr
) < 1)
1426 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
]) &&
1427 inet_pton(AF_INET6
, blobmsg_data(cur
), &p
.raddr
) < 1)
1430 strncpy(p
.name
, name
, sizeof(p
.name
));
1431 if (tunnel_ioctl("ip6tnl0", SIOCADDTUNNEL
, &p
) < 0)