2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
4 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
17 #include <sys/socket.h>
18 #include <sys/ioctl.h>
20 #include <sys/syscall.h>
23 #include <net/if_arp.h>
25 #include <arpa/inet.h>
26 #include <netinet/in.h>
28 #include <linux/rtnetlink.h>
29 #include <linux/sockios.h>
31 #include <linux/if_vlan.h>
32 #include <linux/if_bridge.h>
33 #include <linux/if_tunnel.h>
34 #include <linux/ethtool.h>
35 #include <linux/fib_rules.h>
43 #include <netlink/msg.h>
44 #include <netlink/attr.h>
45 #include <netlink/socket.h>
46 #include <libubox/uloop.h>
53 struct uloop_fd uloop
;
58 static int sock_ioctl
= -1;
59 static struct nl_sock
*sock_rtnl
= NULL
;
61 static int cb_rtnl_event(struct nl_msg
*msg
, void *arg
);
62 static void handle_hotplug_event(struct uloop_fd
*u
, unsigned int events
);
64 static char dev_buf
[256];
67 handler_nl_event(struct uloop_fd
*u
, unsigned int events
)
69 struct event_socket
*ev
= container_of(u
, struct event_socket
, uloop
);
70 nl_recvmsgs(ev
->sock
, ev
->cb
);
73 static struct nl_sock
*
74 create_socket(int protocol
, int groups
)
78 sock
= nl_socket_alloc();
83 nl_join_groups(sock
, groups
);
85 if (nl_connect(sock
, protocol
))
92 create_raw_event_socket(struct event_socket
*ev
, int protocol
, int groups
,
95 ev
->sock
= create_socket(protocol
, groups
);
99 ev
->uloop
.fd
= nl_socket_get_fd(ev
->sock
);
101 uloop_fd_add(&ev
->uloop
, ULOOP_READ
| ULOOP_EDGE_TRIGGER
);
106 create_event_socket(struct event_socket
*ev
, int protocol
,
107 int (*cb
)(struct nl_msg
*msg
, void *arg
))
109 // Prepare socket for link events
110 ev
->cb
= nl_cb_alloc(NL_CB_DEFAULT
);
114 nl_cb_set(ev
->cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb
, NULL
);
116 return create_raw_event_socket(ev
, protocol
, 0, handler_nl_event
);
119 int system_init(void)
121 static struct event_socket rtnl_event
;
122 static struct event_socket hotplug_event
;
124 sock_ioctl
= socket(AF_LOCAL
, SOCK_DGRAM
, 0);
125 fcntl(sock_ioctl
, F_SETFD
, fcntl(sock_ioctl
, F_GETFD
) | FD_CLOEXEC
);
127 // Prepare socket for routing / address control
128 sock_rtnl
= create_socket(NETLINK_ROUTE
, 0);
132 if (!create_event_socket(&rtnl_event
, NETLINK_ROUTE
, cb_rtnl_event
))
135 if (!create_raw_event_socket(&hotplug_event
, NETLINK_KOBJECT_UEVENT
, 1,
136 handle_hotplug_event
))
139 // Receive network link events form kernel
140 nl_socket_add_membership(rtnl_event
.sock
, RTNLGRP_LINK
);
145 static void system_set_sysctl(const char *path
, const char *val
)
149 fd
= open(path
, O_WRONLY
);
153 write(fd
, val
, strlen(val
));
157 static void system_set_dev_sysctl(const char *path
, const char *device
, const char *val
)
159 snprintf(dev_buf
, sizeof(dev_buf
), path
, device
);
160 system_set_sysctl(dev_buf
, val
);
163 static void system_set_disable_ipv6(struct device
*dev
, const char *val
)
165 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev
->ifname
, val
);
168 // Evaluate netlink messages
169 static int cb_rtnl_event(struct nl_msg
*msg
, void *arg
)
171 struct nlmsghdr
*nh
= nlmsg_hdr(msg
);
172 struct ifinfomsg
*ifi
= NLMSG_DATA(nh
);
173 struct nlattr
*nla
[__IFLA_MAX
];
175 if (nh
->nlmsg_type
!= RTM_DELLINK
&& nh
->nlmsg_type
!= RTM_NEWLINK
)
178 nlmsg_parse(nh
, sizeof(*ifi
), nla
, __IFLA_MAX
- 1, NULL
);
179 if (!nla
[IFLA_IFNAME
])
182 struct device
*dev
= device_get(RTA_DATA(nla
[IFLA_IFNAME
]), false);
186 dev
->ifindex
= ifi
->ifi_index
;
187 /* TODO: parse link status */
194 handle_hotplug_msg(char *data
, int size
)
196 const char *subsystem
= NULL
, *interface
= NULL
;
197 char *cur
, *end
, *sep
;
202 if (!strncmp(data
, "add@", 4))
204 else if (!strncmp(data
, "remove@", 7))
209 skip
= strlen(data
) + 1;
212 for (cur
= data
+ skip
; cur
< end
; cur
+= skip
) {
213 skip
= strlen(cur
) + 1;
215 sep
= strchr(cur
, '=');
220 if (!strcmp(cur
, "INTERFACE"))
222 else if (!strcmp(cur
, "SUBSYSTEM")) {
224 if (strcmp(subsystem
, "net") != 0)
227 if (subsystem
&& interface
)
233 dev
= device_get(interface
, false);
237 if (dev
->type
!= &simple_device_type
)
240 if (add
&& system_if_force_external(dev
->ifname
))
243 device_set_present(dev
, add
);
247 handle_hotplug_event(struct uloop_fd
*u
, unsigned int events
)
249 struct event_socket
*ev
= container_of(u
, struct event_socket
, uloop
);
250 struct sockaddr_nl nla
;
251 unsigned char *buf
= NULL
;
254 while ((size
= nl_recv(ev
->sock
, &nla
, &buf
, NULL
)) > 0) {
256 handle_hotplug_msg((char *) buf
, size
);
262 static int system_rtnl_call(struct nl_msg
*msg
)
266 ret
= nl_send_auto_complete(sock_rtnl
, msg
);
272 return nl_wait_for_ack(sock_rtnl
);
275 int system_bridge_delbr(struct device
*bridge
)
277 return ioctl(sock_ioctl
, SIOCBRDELBR
, bridge
->ifname
);
280 static int system_bridge_if(const char *bridge
, struct device
*dev
, int cmd
, void *data
)
284 memset(&ifr
, 0, sizeof(ifr
));
286 ifr
.ifr_ifindex
= dev
->ifindex
;
289 strncpy(ifr
.ifr_name
, bridge
, sizeof(ifr
.ifr_name
));
290 return ioctl(sock_ioctl
, cmd
, &ifr
);
293 static bool system_is_bridge(const char *name
, char *buf
, int buflen
)
297 snprintf(buf
, buflen
, "/sys/devices/virtual/net/%s/bridge", name
);
298 if (stat(buf
, &st
) < 0)
304 static char *system_get_bridge(const char *name
, char *buf
, int buflen
)
310 snprintf(buf
, buflen
, "/sys/devices/virtual/net/*/brif/%s/bridge", name
);
311 if (glob(buf
, GLOB_NOSORT
, NULL
, &gl
) < 0)
314 if (gl
.gl_pathc
== 0)
317 len
= readlink(gl
.gl_pathv
[0], buf
, buflen
);
322 path
= strrchr(buf
, '/');
329 int system_bridge_addif(struct device
*bridge
, struct device
*dev
)
333 system_set_disable_ipv6(dev
, "1");
334 oldbr
= system_get_bridge(dev
->ifname
, dev_buf
, sizeof(dev_buf
));
335 if (oldbr
&& !strcmp(oldbr
, bridge
->ifname
))
338 return system_bridge_if(bridge
->ifname
, dev
, SIOCBRADDIF
, NULL
);
341 int system_bridge_delif(struct device
*bridge
, struct device
*dev
)
343 system_set_disable_ipv6(dev
, "0");
344 return system_bridge_if(bridge
->ifname
, dev
, SIOCBRDELIF
, NULL
);
347 static int system_if_resolve(struct device
*dev
)
350 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
351 if (!ioctl(sock_ioctl
, SIOCGIFINDEX
, &ifr
))
352 return ifr
.ifr_ifindex
;
357 static int system_if_flags(const char *ifname
, unsigned add
, unsigned rem
)
361 memset(&ifr
, 0, sizeof(ifr
));
362 strncpy(ifr
.ifr_name
, ifname
, sizeof(ifr
.ifr_name
));
363 ioctl(sock_ioctl
, SIOCGIFFLAGS
, &ifr
);
364 ifr
.ifr_flags
|= add
;
365 ifr
.ifr_flags
&= ~rem
;
366 return ioctl(sock_ioctl
, SIOCSIFFLAGS
, &ifr
);
378 static bool check_ifaddr(struct nlmsghdr
*hdr
, int ifindex
)
380 struct ifaddrmsg
*ifa
= NLMSG_DATA(hdr
);
382 return ifa
->ifa_index
== ifindex
;
385 static bool check_route(struct nlmsghdr
*hdr
, int ifindex
)
387 struct rtmsg
*r
= NLMSG_DATA(hdr
);
388 struct nlattr
*tb
[__RTA_MAX
];
390 if (r
->rtm_protocol
== RTPROT_KERNEL
&&
391 r
->rtm_family
== AF_INET6
)
394 nlmsg_parse(hdr
, sizeof(struct rtmsg
), tb
, __RTA_MAX
- 1, NULL
);
398 return *(int *)RTA_DATA(tb
[RTA_OIF
]) == ifindex
;
401 static bool check_rule(struct nlmsghdr
*hdr
, int ifindex
)
406 static int cb_clear_event(struct nl_msg
*msg
, void *arg
)
408 struct clear_data
*clr
= arg
;
409 struct nlmsghdr
*hdr
= nlmsg_hdr(msg
);
410 bool (*cb
)(struct nlmsghdr
*, int ifindex
);
416 if (hdr
->nlmsg_type
!= RTM_NEWADDR
)
423 if (hdr
->nlmsg_type
!= RTM_NEWROUTE
)
430 if (hdr
->nlmsg_type
!= RTM_NEWRULE
)
439 if (!cb(hdr
, clr
->dev
? clr
->dev
->ifindex
: 0))
442 if (type
== RTM_DELRULE
)
443 D(SYSTEM
, "Remove a rule\n");
445 D(SYSTEM
, "Remove %s from device %s\n",
446 type
== RTM_DELADDR
? "an address" : "a route",
448 memcpy(nlmsg_hdr(clr
->msg
), hdr
, hdr
->nlmsg_len
);
449 hdr
= nlmsg_hdr(clr
->msg
);
450 hdr
->nlmsg_type
= type
;
451 hdr
->nlmsg_flags
= NLM_F_REQUEST
;
453 if (!nl_send_auto_complete(sock_rtnl
, clr
->msg
))
454 nl_wait_for_ack(sock_rtnl
);
460 cb_finish_event(struct nl_msg
*msg
, void *arg
)
468 error_handler(struct sockaddr_nl
*nla
, struct nlmsgerr
*err
, void *arg
)
471 *pending
= err
->error
;
476 system_if_clear_entries(struct device
*dev
, int type
, int af
)
478 struct clear_data clr
;
479 struct nl_cb
*cb
= nl_cb_alloc(NL_CB_DEFAULT
);
482 .rtm_flags
= RTM_F_CLONED
,
484 int flags
= NLM_F_DUMP
;
493 clr
.size
= sizeof(struct rtgenmsg
);
496 clr
.size
= sizeof(struct rtmsg
);
505 clr
.msg
= nlmsg_alloc_simple(type
, flags
);
509 nlmsg_append(clr
.msg
, &rtm
, clr
.size
, 0);
510 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb_clear_event
, &clr
);
511 nl_cb_set(cb
, NL_CB_FINISH
, NL_CB_CUSTOM
, cb_finish_event
, &pending
);
512 nl_cb_err(cb
, NL_CB_CUSTOM
, error_handler
, &pending
);
514 nl_send_auto_complete(sock_rtnl
, clr
.msg
);
516 nl_recvmsgs(sock_rtnl
, cb
);
524 * Clear bridge (membership) state and bring down device
526 void system_if_clear_state(struct device
*dev
)
528 static char buf
[256];
534 dev
->ifindex
= system_if_resolve(dev
);
538 system_if_flags(dev
->ifname
, 0, IFF_UP
);
540 if (system_is_bridge(dev
->ifname
, buf
, sizeof(buf
))) {
541 D(SYSTEM
, "Delete existing bridge named '%s'\n", dev
->ifname
);
542 system_bridge_delbr(dev
);
546 bridge
= system_get_bridge(dev
->ifname
, buf
, sizeof(buf
));
548 D(SYSTEM
, "Remove device '%s' from bridge '%s'\n", dev
->ifname
, bridge
);
549 system_bridge_if(bridge
, dev
, SIOCBRDELIF
, NULL
);
552 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET
);
553 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET
);
554 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET6
);
555 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET6
);
556 system_set_disable_ipv6(dev
, "0");
559 static inline unsigned long
560 sec_to_jiffies(int val
)
562 return (unsigned long) val
* 100;
565 int system_bridge_addbr(struct device
*bridge
, struct bridge_config
*cfg
)
567 unsigned long args
[4] = {};
569 if (ioctl(sock_ioctl
, SIOCBRADDBR
, bridge
->ifname
) < 0)
572 args
[0] = BRCTL_SET_BRIDGE_STP_STATE
;
573 args
[1] = !!cfg
->stp
;
574 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
576 args
[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY
;
577 args
[1] = sec_to_jiffies(cfg
->forward_delay
);
578 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
580 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
581 bridge
->ifname
, cfg
->igmp_snoop
? "1" : "0");
583 if (cfg
->flags
& BRIDGE_OPT_AGEING_TIME
) {
584 args
[0] = BRCTL_SET_AGEING_TIME
;
585 args
[1] = sec_to_jiffies(cfg
->ageing_time
);
586 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
589 if (cfg
->flags
& BRIDGE_OPT_HELLO_TIME
) {
590 args
[0] = BRCTL_SET_BRIDGE_HELLO_TIME
;
591 args
[1] = sec_to_jiffies(cfg
->hello_time
);
592 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
595 if (cfg
->flags
& BRIDGE_OPT_MAX_AGE
) {
596 args
[0] = BRCTL_SET_BRIDGE_MAX_AGE
;
597 args
[1] = sec_to_jiffies(cfg
->max_age
);
598 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
604 static int system_vlan(struct device
*dev
, int id
)
606 struct vlan_ioctl_args ifr
= {
607 .cmd
= SET_VLAN_NAME_TYPE_CMD
,
608 .u
.name_type
= VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD
,
611 ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
614 ifr
.cmd
= DEL_VLAN_CMD
;
617 ifr
.cmd
= ADD_VLAN_CMD
;
620 strncpy(ifr
.device1
, dev
->ifname
, sizeof(ifr
.device1
));
621 return ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
624 int system_vlan_add(struct device
*dev
, int id
)
626 return system_vlan(dev
, id
);
629 int system_vlan_del(struct device
*dev
)
631 return system_vlan(dev
, -1);
635 system_if_get_settings(struct device
*dev
, struct device_settings
*s
)
639 memset(&ifr
, 0, sizeof(ifr
));
640 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
642 if (ioctl(sock_ioctl
, SIOCGIFMTU
, &ifr
) == 0) {
643 s
->mtu
= ifr
.ifr_mtu
;
644 s
->flags
|= DEV_OPT_MTU
;
647 if (ioctl(sock_ioctl
, SIOCGIFTXQLEN
, &ifr
) == 0) {
648 s
->txqueuelen
= ifr
.ifr_qlen
;
649 s
->flags
|= DEV_OPT_TXQUEUELEN
;
652 if (ioctl(sock_ioctl
, SIOCGIFHWADDR
, &ifr
) == 0) {
653 memcpy(s
->macaddr
, &ifr
.ifr_hwaddr
.sa_data
, sizeof(s
->macaddr
));
654 s
->flags
|= DEV_OPT_MACADDR
;
659 system_if_apply_settings(struct device
*dev
, struct device_settings
*s
)
663 memset(&ifr
, 0, sizeof(ifr
));
664 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
665 if (s
->flags
& DEV_OPT_MTU
) {
666 ifr
.ifr_mtu
= s
->mtu
;
667 if (ioctl(sock_ioctl
, SIOCSIFMTU
, &ifr
) < 0)
668 s
->flags
&= ~DEV_OPT_MTU
;
670 if (s
->flags
& DEV_OPT_TXQUEUELEN
) {
671 ifr
.ifr_qlen
= s
->txqueuelen
;
672 if (ioctl(sock_ioctl
, SIOCSIFTXQLEN
, &ifr
) < 0)
673 s
->flags
&= ~DEV_OPT_TXQUEUELEN
;
675 if ((s
->flags
& DEV_OPT_MACADDR
) && !dev
->external
) {
676 ifr
.ifr_hwaddr
.sa_family
= ARPHRD_ETHER
;
677 memcpy(&ifr
.ifr_hwaddr
.sa_data
, s
->macaddr
, sizeof(s
->macaddr
));
678 if (ioctl(sock_ioctl
, SIOCSIFHWADDR
, &ifr
) < 0)
679 s
->flags
&= ~DEV_OPT_MACADDR
;
683 int system_if_up(struct device
*dev
)
685 system_if_get_settings(dev
, &dev
->orig_settings
);
686 system_if_apply_settings(dev
, &dev
->settings
);
687 dev
->ifindex
= system_if_resolve(dev
);
688 return system_if_flags(dev
->ifname
, IFF_UP
, 0);
691 int system_if_down(struct device
*dev
)
693 int ret
= system_if_flags(dev
->ifname
, 0, IFF_UP
);
694 dev
->orig_settings
.flags
&= dev
->settings
.flags
;
695 system_if_apply_settings(dev
, &dev
->orig_settings
);
699 int system_if_check(struct device
*dev
)
701 device_set_present(dev
, (system_if_resolve(dev
) > 0));
706 system_if_get_parent(struct device
*dev
)
708 char buf
[64], *devname
;
709 int ifindex
, iflink
, len
;
712 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/iflink", dev
->ifname
);
717 len
= fread(buf
, 1, sizeof(buf
) - 1, f
);
724 iflink
= strtoul(buf
, NULL
, 0);
725 ifindex
= system_if_resolve(dev
);
726 if (!iflink
|| iflink
== ifindex
)
729 devname
= if_indextoname(iflink
, buf
);
733 return device_get(devname
, true);
737 read_string_file(int dir_fd
, const char *file
, char *buf
, int len
)
743 fd
= openat(dir_fd
, file
, O_RDONLY
);
748 len
= read(fd
, buf
, len
- 1);
752 } else if (len
> 0) {
755 c
= strchr(buf
, '\n');
768 read_uint64_file(int dir_fd
, const char *file
, uint64_t *val
)
773 ret
= read_string_file(dir_fd
, file
, buf
, sizeof(buf
));
775 *val
= strtoull(buf
, NULL
, 0);
780 /* Assume advertised flags == supported flags */
781 static const struct {
784 } ethtool_link_modes
[] = {
785 { ADVERTISED_10baseT_Half
, "10H" },
786 { ADVERTISED_10baseT_Full
, "10F" },
787 { ADVERTISED_100baseT_Half
, "100H" },
788 { ADVERTISED_100baseT_Full
, "100F" },
789 { ADVERTISED_1000baseT_Half
, "1000H" },
790 { ADVERTISED_1000baseT_Full
, "1000F" },
793 static void system_add_link_modes(struct blob_buf
*b
, __u32 mask
)
796 for (i
= 0; i
< ARRAY_SIZE(ethtool_link_modes
); i
++) {
797 if (mask
& ethtool_link_modes
[i
].mask
)
798 blobmsg_add_string(b
, NULL
, ethtool_link_modes
[i
].name
);
803 system_if_force_external(const char *ifname
)
808 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/phy80211", ifname
);
809 return stat(buf
, &s
) == 0;
813 system_if_dump_info(struct device
*dev
, struct blob_buf
*b
)
815 struct ethtool_cmd ecmd
;
822 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s", dev
->ifname
);
823 dir_fd
= open(buf
, O_DIRECTORY
);
825 if (read_uint64_file(dir_fd
, "carrier", &val
))
826 blobmsg_add_u8(b
, "link", !!val
);
828 memset(&ecmd
, 0, sizeof(ecmd
));
829 memset(&ifr
, 0, sizeof(ifr
));
830 strcpy(ifr
.ifr_name
, dev
->ifname
);
831 ifr
.ifr_data
= (caddr_t
) &ecmd
;
832 ecmd
.cmd
= ETHTOOL_GSET
;
834 if (ioctl(sock_ioctl
, SIOCETHTOOL
, &ifr
) == 0) {
835 c
= blobmsg_open_array(b
, "link-advertising");
836 system_add_link_modes(b
, ecmd
.advertising
);
837 blobmsg_close_array(b
, c
);
839 c
= blobmsg_open_array(b
, "link-supported");
840 system_add_link_modes(b
, ecmd
.supported
);
841 blobmsg_close_array(b
, c
);
843 s
= blobmsg_alloc_string_buffer(b
, "speed", 8);
844 snprintf(s
, 8, "%d%c", ethtool_cmd_speed(&ecmd
),
845 ecmd
.duplex
== DUPLEX_HALF
? 'H' : 'F');
846 blobmsg_add_string_buffer(b
);
854 system_if_dump_stats(struct device
*dev
, struct blob_buf
*b
)
856 const char *const counters
[] = {
857 "collisions", "rx_frame_errors", "tx_compressed",
858 "multicast", "rx_length_errors", "tx_dropped",
859 "rx_bytes", "rx_missed_errors", "tx_errors",
860 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
861 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
862 "rx_dropped", "tx_aborted_errors", "tx_packets",
863 "rx_errors", "tx_bytes", "tx_window_errors",
864 "rx_fifo_errors", "tx_carrier_errors",
871 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/statistics", dev
->ifname
);
872 stats_dir
= open(buf
, O_DIRECTORY
);
876 for (i
= 0; i
< ARRAY_SIZE(counters
); i
++)
877 if (read_uint64_file(stats_dir
, counters
[i
], &val
))
878 blobmsg_add_u64(b
, counters
[i
], val
);
884 static int system_addr(struct device
*dev
, struct device_addr
*addr
, int cmd
)
886 bool v4
= ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
);
887 int alen
= v4
? 4 : 16;
888 unsigned int flags
= 0;
889 struct ifaddrmsg ifa
= {
890 .ifa_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
891 .ifa_prefixlen
= addr
->mask
,
892 .ifa_index
= dev
->ifindex
,
896 if (cmd
== RTM_NEWADDR
)
897 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
899 msg
= nlmsg_alloc_simple(cmd
, flags
);
903 nlmsg_append(msg
, &ifa
, sizeof(ifa
), 0);
904 nla_put(msg
, IFA_LOCAL
, alen
, &addr
->addr
);
907 nla_put_u32(msg
, IFA_BROADCAST
, addr
->broadcast
);
908 if (addr
->point_to_point
)
909 nla_put_u32(msg
, IFA_ADDRESS
, addr
->point_to_point
);
911 time_t now
= system_get_rtime();
912 struct ifa_cacheinfo cinfo
= {0xffffffffU
, 0xffffffffU
, 0, 0};
914 if (addr
->preferred_until
) {
915 int preferred
= addr
->preferred_until
- now
;
919 cinfo
.ifa_prefered
= preferred
;
922 if (addr
->valid_until
) {
923 int valid
= addr
->valid_until
- now
;
927 cinfo
.ifa_valid
= valid
;
930 nla_put(msg
, IFA_CACHEINFO
, sizeof(cinfo
), &cinfo
);
933 return system_rtnl_call(msg
);
936 int system_add_address(struct device
*dev
, struct device_addr
*addr
)
938 return system_addr(dev
, addr
, RTM_NEWADDR
);
941 int system_del_address(struct device
*dev
, struct device_addr
*addr
)
943 return system_addr(dev
, addr
, RTM_DELADDR
);
946 static int system_rt(struct device
*dev
, struct device_route
*route
, int cmd
)
948 int alen
= ((route
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
) ? 4 : 16;
950 unsigned int flags
= 0;
953 have_gw
= !!route
->nexthop
.in
.s_addr
;
955 have_gw
= route
->nexthop
.in6
.s6_addr32
[0] ||
956 route
->nexthop
.in6
.s6_addr32
[1] ||
957 route
->nexthop
.in6
.s6_addr32
[2] ||
958 route
->nexthop
.in6
.s6_addr32
[3];
960 unsigned char scope
= (cmd
== RTM_DELROUTE
) ? RT_SCOPE_NOWHERE
:
961 (have_gw
) ? RT_SCOPE_UNIVERSE
: RT_SCOPE_LINK
;
963 unsigned int table
= (route
->flags
& DEVROUTE_TABLE
) ? route
->table
: RT_TABLE_MAIN
;
966 .rtm_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
967 .rtm_dst_len
= route
->mask
,
968 .rtm_table
= (table
< 256) ? table
: RT_TABLE_UNSPEC
,
969 .rtm_protocol
= (route
->flags
& DEVADDR_KERNEL
) ? RTPROT_KERNEL
: RTPROT_STATIC
,
971 .rtm_type
= (cmd
== RTM_DELROUTE
) ? 0: RTN_UNICAST
,
975 if (cmd
== RTM_NEWROUTE
) {
976 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
978 if (!dev
) { // Add null-route
979 rtm
.rtm_scope
= RT_SCOPE_UNIVERSE
;
980 rtm
.rtm_type
= RTN_UNREACHABLE
;
984 msg
= nlmsg_alloc_simple(cmd
, flags
);
988 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
991 nla_put(msg
, RTA_DST
, alen
, &route
->addr
);
993 if (route
->metric
> 0)
994 nla_put_u32(msg
, RTA_PRIORITY
, route
->metric
);
997 nla_put(msg
, RTA_GATEWAY
, alen
, &route
->nexthop
);
1000 nla_put_u32(msg
, RTA_OIF
, dev
->ifindex
);
1003 nla_put_u32(msg
, RTA_TABLE
, table
);
1005 return system_rtnl_call(msg
);
1008 int system_add_route(struct device
*dev
, struct device_route
*route
)
1010 return system_rt(dev
, route
, RTM_NEWROUTE
);
1013 int system_del_route(struct device
*dev
, struct device_route
*route
)
1015 return system_rt(dev
, route
, RTM_DELROUTE
);
1018 int system_flush_routes(void)
1020 const char *names
[] = {
1021 "/proc/sys/net/ipv4/route/flush",
1022 "/proc/sys/net/ipv6/route/flush"
1026 for (i
= 0; i
< ARRAY_SIZE(names
); i
++) {
1027 fd
= open(names
[i
], O_WRONLY
);
1037 bool system_resolve_rt_table(const char *name
, unsigned int *id
)
1041 unsigned int n
, table
= RT_TABLE_UNSPEC
;
1043 /* first try to parse table as number */
1044 if ((n
= strtoul(name
, &e
, 0)) > 0 && !*e
)
1047 /* handle well known aliases */
1048 else if (!strcmp(name
, "default"))
1049 table
= RT_TABLE_DEFAULT
;
1050 else if (!strcmp(name
, "main"))
1051 table
= RT_TABLE_MAIN
;
1052 else if (!strcmp(name
, "local"))
1053 table
= RT_TABLE_LOCAL
;
1055 /* try to look up name in /etc/iproute2/rt_tables */
1056 else if ((f
= fopen("/etc/iproute2/rt_tables", "r")) != NULL
)
1058 while (fgets(buf
, sizeof(buf
) - 1, f
) != NULL
)
1060 if ((e
= strtok(buf
, " \t\n")) == NULL
|| *e
== '#')
1063 n
= strtoul(e
, NULL
, 10);
1064 e
= strtok(NULL
, " \t\n");
1066 if (e
&& !strcmp(e
, name
))
1076 if (table
== RT_TABLE_UNSPEC
)
1079 /* do not consider main table special */
1080 if (table
== RT_TABLE_MAIN
)
1081 table
= RT_TABLE_UNSPEC
;
1087 static int system_iprule(struct iprule
*rule
, int cmd
)
1089 int alen
= ((rule
->flags
& IPRULE_FAMILY
) == IPRULE_INET4
) ? 4 : 16;
1092 struct rtmsg rtm
= {
1093 .rtm_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1094 .rtm_protocol
= RTPROT_STATIC
,
1095 .rtm_scope
= RT_SCOPE_UNIVERSE
,
1096 .rtm_table
= RT_TABLE_UNSPEC
,
1097 .rtm_type
= RTN_UNSPEC
,
1101 if (cmd
== RTM_NEWRULE
) {
1102 rtm
.rtm_type
= RTN_UNICAST
;
1103 rtm
.rtm_flags
|= NLM_F_REPLACE
| NLM_F_EXCL
;
1107 rtm
.rtm_flags
|= FIB_RULE_INVERT
;
1109 if (rule
->flags
& IPRULE_SRC
)
1110 rtm
.rtm_src_len
= rule
->src_mask
;
1112 if (rule
->flags
& IPRULE_DEST
)
1113 rtm
.rtm_dst_len
= rule
->dest_mask
;
1115 if (rule
->flags
& IPRULE_TOS
)
1116 rtm
.rtm_tos
= rule
->tos
;
1118 if (rule
->flags
& IPRULE_LOOKUP
) {
1119 if (rule
->lookup
< 256)
1120 rtm
.rtm_table
= rule
->lookup
;
1123 if (rule
->flags
& IPRULE_ACTION
)
1124 rtm
.rtm_type
= rule
->action
;
1125 else if (rule
->flags
& IPRULE_GOTO
)
1126 rtm
.rtm_type
= FR_ACT_GOTO
;
1127 else if (!(rule
->flags
& (IPRULE_LOOKUP
| IPRULE_ACTION
| IPRULE_GOTO
)))
1128 rtm
.rtm_type
= FR_ACT_NOP
;
1130 msg
= nlmsg_alloc_simple(cmd
, NLM_F_REQUEST
);
1135 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
1137 if (rule
->flags
& IPRULE_IN
)
1138 nla_put(msg
, FRA_IFNAME
, strlen(rule
->in_dev
) + 1, rule
->in_dev
);
1140 if (rule
->flags
& IPRULE_OUT
)
1141 nla_put(msg
, FRA_OIFNAME
, strlen(rule
->out_dev
) + 1, rule
->out_dev
);
1143 if (rule
->flags
& IPRULE_SRC
)
1144 nla_put(msg
, FRA_SRC
, alen
, &rule
->src_addr
);
1146 if (rule
->flags
& IPRULE_DEST
)
1147 nla_put(msg
, FRA_DST
, alen
, &rule
->dest_addr
);
1149 if (rule
->flags
& IPRULE_PRIORITY
)
1150 nla_put_u32(msg
, FRA_PRIORITY
, rule
->priority
);
1152 if (rule
->flags
& IPRULE_FWMARK
)
1153 nla_put_u32(msg
, FRA_FWMARK
, rule
->fwmark
);
1155 if (rule
->flags
& IPRULE_FWMASK
)
1156 nla_put_u32(msg
, FRA_FWMASK
, rule
->fwmask
);
1158 if (rule
->flags
& IPRULE_LOOKUP
) {
1159 if (rule
->lookup
>= 256)
1160 nla_put_u32(msg
, FRA_TABLE
, rule
->lookup
);
1163 if (rule
->flags
& IPRULE_GOTO
)
1164 nla_put_u32(msg
, FRA_GOTO
, rule
->gotoid
);
1166 return system_rtnl_call(msg
);
1169 int system_add_iprule(struct iprule
*rule
)
1171 return system_iprule(rule
, RTM_NEWRULE
);
1174 int system_del_iprule(struct iprule
*rule
)
1176 return system_iprule(rule
, RTM_DELRULE
);
1179 int system_flush_iprules(void)
1184 system_if_clear_entries(NULL
, RTM_GETRULE
, AF_INET
);
1185 system_if_clear_entries(NULL
, RTM_GETRULE
, AF_INET6
);
1187 memset(&rule
, 0, sizeof(rule
));
1190 rule
.flags
= IPRULE_INET4
| IPRULE_PRIORITY
| IPRULE_LOOKUP
;
1193 rule
.lookup
= RT_TABLE_LOCAL
;
1194 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1196 rule
.priority
= 32766;
1197 rule
.lookup
= RT_TABLE_MAIN
;
1198 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1200 rule
.priority
= 32767;
1201 rule
.lookup
= RT_TABLE_DEFAULT
;
1202 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1205 rule
.flags
= IPRULE_INET6
| IPRULE_PRIORITY
| IPRULE_LOOKUP
;
1208 rule
.lookup
= RT_TABLE_LOCAL
;
1209 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1211 rule
.priority
= 32766;
1212 rule
.lookup
= RT_TABLE_MAIN
;
1213 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1218 bool system_resolve_iprule_action(const char *action
, unsigned int *id
)
1223 if (!strcmp(action
, "local"))
1225 else if (!strcmp(action
, "nat"))
1227 else if (!strcmp(action
, "broadcast"))
1229 else if (!strcmp(action
, "anycast"))
1231 else if (!strcmp(action
, "multicast"))
1233 else if (!strcmp(action
, "prohibit"))
1235 else if (!strcmp(action
, "unreachable"))
1236 n
= RTN_UNREACHABLE
;
1237 else if (!strcmp(action
, "blackhole"))
1239 else if (!strcmp(action
, "xresolve"))
1241 else if (!strcmp(action
, "unicast"))
1243 else if (!strcmp(action
, "throw"))
1246 n
= strtoul(action
, &e
, 0);
1247 if (!e
|| *e
|| e
== action
|| n
> 255)
1255 time_t system_get_rtime(void)
1260 if (syscall(__NR_clock_gettime
, CLOCK_MONOTONIC
, &ts
) == 0)
1263 if (gettimeofday(&tv
, NULL
) == 0)
1270 #define IP_DF 0x4000
1273 static void tunnel_parm_init(struct ip_tunnel_parm
*p
)
1275 memset(p
, 0, sizeof(*p
));
1278 p
->iph
.frag_off
= htons(IP_DF
);
1281 static int tunnel_ioctl(const char *name
, int cmd
, void *p
)
1285 memset(&ifr
, 0, sizeof(ifr
));
1286 strncpy(ifr
.ifr_name
, name
, sizeof(ifr
.ifr_name
));
1287 ifr
.ifr_ifru
.ifru_data
= p
;
1288 return ioctl(sock_ioctl
, cmd
, &ifr
);
1291 int system_del_ip_tunnel(const char *name
)
1293 struct ip_tunnel_parm p
;
1295 tunnel_parm_init(&p
);
1296 return tunnel_ioctl(name
, SIOCDELTUNNEL
, &p
);
1299 int system_update_ipv6_mtu(struct device
*dev
, int mtu
)
1303 snprintf(buf
, sizeof(buf
), "/proc/sys/net/ipv6/conf/%s/mtu",
1306 int fd
= open(buf
, O_RDWR
);
1307 ssize_t len
= read(fd
, buf
, sizeof(buf
) - 1);
1314 if (!mtu
|| ret
<= mtu
)
1317 lseek(fd
, 0, SEEK_SET
);
1318 if (write(fd
, buf
, snprintf(buf
, sizeof(buf
), "%i", mtu
)) <= 0)
1326 static int parse_ipaddr(struct blob_attr
*attr
, __be32
*addr
)
1331 return inet_pton(AF_INET
, blobmsg_data(attr
), (void *) addr
);
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
;
1339 struct ip_tunnel_parm p
;
1340 const char *base
, *str
;
1343 system_del_ip_tunnel(name
);
1345 tunnel_parm_init(&p
);
1347 blobmsg_parse(tunnel_attr_list
.params
, __TUNNEL_ATTR_MAX
, tb
,
1348 blob_data(attr
), blob_len(attr
));
1350 if (!(cur
= tb
[TUNNEL_ATTR_TYPE
]))
1352 str
= blobmsg_data(cur
);
1353 is_sit
= !strcmp(str
, "sit");
1356 p
.iph
.protocol
= IPPROTO_IPV6
;
1361 if (!parse_ipaddr(tb
[TUNNEL_ATTR_LOCAL
], &p
.iph
.saddr
))
1364 if (!parse_ipaddr(tb
[TUNNEL_ATTR_REMOTE
], &p
.iph
.daddr
))
1367 if ((cur
= tb
[TUNNEL_ATTR_TTL
])) {
1368 unsigned int val
= blobmsg_get_u32(cur
);
1376 strncpy(p
.name
, name
, sizeof(p
.name
));
1377 if (tunnel_ioctl(base
, SIOCADDTUNNEL
, &p
) < 0)
1381 cur
= tb
[TUNNEL_ATTR_6RD_PREFIX
];
1382 if (cur
&& is_sit
) {
1384 struct ip_tunnel_6rd p6
;
1386 memset(&p6
, 0, sizeof(p6
));
1388 if (!parse_ip_and_netmask(AF_INET6
, blobmsg_data(cur
),
1389 &p6
.prefix
, &mask
) || mask
> 128)
1391 p6
.prefixlen
= mask
;
1393 if ((cur
= tb
[TUNNEL_ATTR_6RD_RELAY_PREFIX
])) {
1394 if (!parse_ip_and_netmask(AF_INET
, blobmsg_data(cur
),
1395 &p6
.relay_prefix
, &mask
) || mask
> 32)
1397 p6
.relay_prefixlen
= mask
;
1400 if (tunnel_ioctl(name
, SIOCADD6RD
, &p6
) < 0) {
1401 system_del_ip_tunnel(name
);