2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
4 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
5 * Copyright (C) 2013 Steven Barth <steven@midlink.org>
6 * Copyright (C) 2014 Gioacchino Mazzurco <gio@eigenlab.org>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2
10 * as published by the Free Software Foundation
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
19 #include <sys/socket.h>
20 #include <sys/ioctl.h>
22 #include <sys/syscall.h>
25 #include <net/if_arp.h>
27 #include <arpa/inet.h>
28 #include <netinet/in.h>
30 #include <linux/rtnetlink.h>
31 #include <linux/sockios.h>
33 #include <linux/if_link.h>
34 #include <linux/if_vlan.h>
35 #include <linux/if_bridge.h>
36 #include <linux/if_tunnel.h>
37 #include <linux/ip6_tunnel.h>
38 #include <linux/ethtool.h>
39 #include <linux/fib_rules.h>
40 #include <linux/version.h>
42 #ifndef RTN_FAILED_POLICY
43 #define RTN_FAILED_POLICY 12
51 #include <netlink/msg.h>
52 #include <netlink/attr.h>
53 #include <netlink/socket.h>
54 #include <libubox/uloop.h>
61 struct uloop_fd uloop
;
66 static int sock_ioctl
= -1;
67 static struct nl_sock
*sock_rtnl
= NULL
;
69 static int cb_rtnl_event(struct nl_msg
*msg
, void *arg
);
70 static void handle_hotplug_event(struct uloop_fd
*u
, unsigned int events
);
72 static char dev_buf
[256];
75 handler_nl_event(struct uloop_fd
*u
, unsigned int events
)
77 struct event_socket
*ev
= container_of(u
, struct event_socket
, uloop
);
79 socklen_t errlen
= sizeof(err
);
82 nl_recvmsgs_default(ev
->sock
);
86 if (getsockopt(u
->fd
, SOL_SOCKET
, SO_ERROR
, (void *)&err
, &errlen
))
91 // Increase rx buffer size on netlink socket
93 if (nl_socket_set_buffer_size(ev
->sock
, ev
->bufsize
, 0))
96 // Request full dump since some info got dropped
97 struct rtgenmsg msg
= { .rtgen_family
= AF_UNSPEC
};
98 nl_send_simple(ev
->sock
, RTM_GETLINK
, NLM_F_DUMP
, &msg
, sizeof(msg
));
108 uloop_fd_delete(&ev
->uloop
);
112 static struct nl_sock
*
113 create_socket(int protocol
, int groups
)
115 struct nl_sock
*sock
;
117 sock
= nl_socket_alloc();
122 nl_join_groups(sock
, groups
);
124 if (nl_connect(sock
, protocol
))
131 create_raw_event_socket(struct event_socket
*ev
, int protocol
, int groups
,
132 uloop_fd_handler cb
, int flags
)
134 ev
->sock
= create_socket(protocol
, groups
);
138 ev
->uloop
.fd
= nl_socket_get_fd(ev
->sock
);
140 if (uloop_fd_add(&ev
->uloop
, ULOOP_READ
|flags
))
147 create_event_socket(struct event_socket
*ev
, int protocol
,
148 int (*cb
)(struct nl_msg
*msg
, void *arg
))
150 if (!create_raw_event_socket(ev
, protocol
, 0, handler_nl_event
, ULOOP_ERROR_CB
))
153 // Install the valid custom callback handler
154 nl_socket_modify_cb(ev
->sock
, NL_CB_VALID
, NL_CB_CUSTOM
, cb
, NULL
);
156 // Disable sequence number checking on event sockets
157 nl_socket_disable_seq_check(ev
->sock
);
159 // Increase rx buffer size to 65K on event sockets
161 if (nl_socket_set_buffer_size(ev
->sock
, ev
->bufsize
, 0))
168 system_rtn_aton(const char *src
, unsigned int *dst
)
173 if (!strcmp(src
, "local"))
175 else if (!strcmp(src
, "nat"))
177 else if (!strcmp(src
, "broadcast"))
179 else if (!strcmp(src
, "anycast"))
181 else if (!strcmp(src
, "multicast"))
183 else if (!strcmp(src
, "prohibit"))
185 else if (!strcmp(src
, "unreachable"))
187 else if (!strcmp(src
, "blackhole"))
189 else if (!strcmp(src
, "xresolve"))
191 else if (!strcmp(src
, "unicast"))
193 else if (!strcmp(src
, "throw"))
195 else if (!strcmp(src
, "failed_policy"))
196 n
= RTN_FAILED_POLICY
;
198 n
= strtoul(src
, &e
, 0);
199 if (!e
|| *e
|| e
== src
|| n
> 255)
208 system_tos_aton(const char *src
, unsigned *dst
)
212 *dst
= strtoul(src
, &e
, 16);
213 if (e
== src
|| *e
|| *dst
> 255)
219 int system_init(void)
221 static struct event_socket rtnl_event
;
222 static struct event_socket hotplug_event
;
224 sock_ioctl
= socket(AF_LOCAL
, SOCK_DGRAM
, 0);
225 system_fd_set_cloexec(sock_ioctl
);
227 // Prepare socket for routing / address control
228 sock_rtnl
= create_socket(NETLINK_ROUTE
, 0);
232 if (!create_event_socket(&rtnl_event
, NETLINK_ROUTE
, cb_rtnl_event
))
235 if (!create_raw_event_socket(&hotplug_event
, NETLINK_KOBJECT_UEVENT
, 1,
236 handle_hotplug_event
, 0))
239 // Receive network link events form kernel
240 nl_socket_add_membership(rtnl_event
.sock
, RTNLGRP_LINK
);
245 static void system_set_sysctl(const char *path
, const char *val
)
249 fd
= open(path
, O_WRONLY
);
253 if (write(fd
, val
, strlen(val
))) {}
257 static void system_set_dev_sysctl(const char *path
, const char *device
, const char *val
)
259 snprintf(dev_buf
, sizeof(dev_buf
), path
, device
);
260 system_set_sysctl(dev_buf
, val
);
263 static void system_set_disable_ipv6(struct device
*dev
, const char *val
)
265 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev
->ifname
, val
);
268 static int system_get_sysctl(const char *path
, char *buf
, const size_t buf_sz
)
270 int fd
= -1, ret
= -1;
272 fd
= open(path
, O_RDONLY
);
276 ssize_t len
= read(fd
, buf
, buf_sz
- 1);
290 system_get_dev_sysctl(const char *path
, const char *device
, char *buf
, const size_t buf_sz
)
292 snprintf(dev_buf
, sizeof(dev_buf
), path
, device
);
293 return system_get_sysctl(dev_buf
, buf
, buf_sz
);
296 static int system_get_disable_ipv6(struct device
*dev
, char *buf
, const size_t buf_sz
)
298 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
299 dev
->ifname
, buf
, buf_sz
);
303 #define IFF_LOWER_UP 0x10000
306 // Evaluate netlink messages
307 static int cb_rtnl_event(struct nl_msg
*msg
, void *arg
)
309 struct nlmsghdr
*nh
= nlmsg_hdr(msg
);
310 struct ifinfomsg
*ifi
= NLMSG_DATA(nh
);
311 struct nlattr
*nla
[__IFLA_MAX
];
313 if (nh
->nlmsg_type
!= RTM_NEWLINK
)
316 nlmsg_parse(nh
, sizeof(*ifi
), nla
, __IFLA_MAX
- 1, NULL
);
317 if (!nla
[IFLA_IFNAME
])
320 struct device
*dev
= device_get(nla_data(nla
[IFLA_IFNAME
]), false);
324 device_set_ifindex(dev
, ifi
->ifi_index
);
325 if (!dev
->type
->keep_link_status
)
326 device_set_link(dev
, ifi
->ifi_flags
& IFF_LOWER_UP
? true : false);
333 handle_hotplug_msg(char *data
, int size
)
335 const char *subsystem
= NULL
, *interface
= NULL
;
336 char *cur
, *end
, *sep
;
341 if (!strncmp(data
, "add@", 4))
343 else if (!strncmp(data
, "remove@", 7))
348 skip
= strlen(data
) + 1;
351 for (cur
= data
+ skip
; cur
< end
; cur
+= skip
) {
352 skip
= strlen(cur
) + 1;
354 sep
= strchr(cur
, '=');
359 if (!strcmp(cur
, "INTERFACE"))
361 else if (!strcmp(cur
, "SUBSYSTEM")) {
363 if (strcmp(subsystem
, "net") != 0)
366 if (subsystem
&& interface
)
372 dev
= device_get(interface
, false);
376 if (dev
->type
!= &simple_device_type
)
379 if (add
&& system_if_force_external(dev
->ifname
))
382 device_set_present(dev
, add
);
386 handle_hotplug_event(struct uloop_fd
*u
, unsigned int events
)
388 struct event_socket
*ev
= container_of(u
, struct event_socket
, uloop
);
389 struct sockaddr_nl nla
;
390 unsigned char *buf
= NULL
;
393 while ((size
= nl_recv(ev
->sock
, &nla
, &buf
, NULL
)) > 0) {
395 handle_hotplug_msg((char *) buf
, size
);
401 static int system_rtnl_call(struct nl_msg
*msg
)
405 ret
= nl_send_auto_complete(sock_rtnl
, msg
);
411 return nl_wait_for_ack(sock_rtnl
);
414 int system_bridge_delbr(struct device
*bridge
)
416 return ioctl(sock_ioctl
, SIOCBRDELBR
, bridge
->ifname
);
419 static int system_bridge_if(const char *bridge
, struct device
*dev
, int cmd
, void *data
)
423 memset(&ifr
, 0, sizeof(ifr
));
425 ifr
.ifr_ifindex
= dev
->ifindex
;
428 strncpy(ifr
.ifr_name
, bridge
, sizeof(ifr
.ifr_name
));
429 return ioctl(sock_ioctl
, cmd
, &ifr
);
432 static bool system_is_bridge(const char *name
, char *buf
, int buflen
)
436 snprintf(buf
, buflen
, "/sys/devices/virtual/net/%s/bridge", name
);
437 if (stat(buf
, &st
) < 0)
443 static char *system_get_bridge(const char *name
, char *buf
, int buflen
)
449 snprintf(buf
, buflen
, "/sys/devices/virtual/net/*/brif/%s/bridge", name
);
450 if (glob(buf
, GLOB_NOSORT
, NULL
, &gl
) < 0)
454 len
= readlink(gl
.gl_pathv
[0], buf
, buflen
);
462 path
= strrchr(buf
, '/');
469 static void system_bridge_set_wireless(const char *bridge
, const char *dev
)
471 snprintf(dev_buf
, sizeof(dev_buf
),
472 "/sys/devices/virtual/net/%s/brif/%s/multicast_to_unicast",
474 system_set_sysctl(dev_buf
, "1");
477 int system_bridge_addif(struct device
*bridge
, struct device
*dev
)
482 oldbr
= system_get_bridge(dev
->ifname
, dev_buf
, sizeof(dev_buf
));
483 if (!oldbr
|| strcmp(oldbr
, bridge
->ifname
) != 0)
484 ret
= system_bridge_if(bridge
->ifname
, dev
, SIOCBRADDIF
, NULL
);
487 system_bridge_set_wireless(bridge
->ifname
, dev
->ifname
);
492 int system_bridge_delif(struct device
*bridge
, struct device
*dev
)
494 return system_bridge_if(bridge
->ifname
, dev
, SIOCBRDELIF
, NULL
);
497 static int system_if_resolve(struct device
*dev
)
500 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
501 if (!ioctl(sock_ioctl
, SIOCGIFINDEX
, &ifr
))
502 return ifr
.ifr_ifindex
;
507 static int system_if_flags(const char *ifname
, unsigned add
, unsigned rem
)
511 memset(&ifr
, 0, sizeof(ifr
));
512 strncpy(ifr
.ifr_name
, ifname
, sizeof(ifr
.ifr_name
));
513 ioctl(sock_ioctl
, SIOCGIFFLAGS
, &ifr
);
514 ifr
.ifr_flags
|= add
;
515 ifr
.ifr_flags
&= ~rem
;
516 return ioctl(sock_ioctl
, SIOCSIFFLAGS
, &ifr
);
528 static bool check_ifaddr(struct nlmsghdr
*hdr
, int ifindex
)
530 struct ifaddrmsg
*ifa
= NLMSG_DATA(hdr
);
532 return ifa
->ifa_index
== ifindex
;
535 static bool check_route(struct nlmsghdr
*hdr
, int ifindex
)
537 struct rtmsg
*r
= NLMSG_DATA(hdr
);
538 struct nlattr
*tb
[__RTA_MAX
];
540 if (r
->rtm_protocol
== RTPROT_KERNEL
&&
541 r
->rtm_family
== AF_INET6
)
544 nlmsg_parse(hdr
, sizeof(struct rtmsg
), tb
, __RTA_MAX
- 1, NULL
);
548 return *(int *)RTA_DATA(tb
[RTA_OIF
]) == ifindex
;
551 static bool check_rule(struct nlmsghdr
*hdr
, int ifindex
)
556 static int cb_clear_event(struct nl_msg
*msg
, void *arg
)
558 struct clear_data
*clr
= arg
;
559 struct nlmsghdr
*hdr
= nlmsg_hdr(msg
);
560 bool (*cb
)(struct nlmsghdr
*, int ifindex
);
566 if (hdr
->nlmsg_type
!= RTM_NEWADDR
)
573 if (hdr
->nlmsg_type
!= RTM_NEWROUTE
)
580 if (hdr
->nlmsg_type
!= RTM_NEWRULE
)
589 if (!cb(hdr
, clr
->dev
? clr
->dev
->ifindex
: 0))
592 if (type
== RTM_DELRULE
)
593 D(SYSTEM
, "Remove a rule\n");
595 D(SYSTEM
, "Remove %s from device %s\n",
596 type
== RTM_DELADDR
? "an address" : "a route",
598 memcpy(nlmsg_hdr(clr
->msg
), hdr
, hdr
->nlmsg_len
);
599 hdr
= nlmsg_hdr(clr
->msg
);
600 hdr
->nlmsg_type
= type
;
601 hdr
->nlmsg_flags
= NLM_F_REQUEST
;
603 nl_socket_disable_auto_ack(sock_rtnl
);
604 nl_send_auto_complete(sock_rtnl
, clr
->msg
);
605 nl_socket_enable_auto_ack(sock_rtnl
);
611 cb_finish_event(struct nl_msg
*msg
, void *arg
)
619 error_handler(struct sockaddr_nl
*nla
, struct nlmsgerr
*err
, void *arg
)
622 *pending
= err
->error
;
627 system_if_clear_entries(struct device
*dev
, int type
, int af
)
629 struct clear_data clr
;
630 struct nl_cb
*cb
= nl_cb_alloc(NL_CB_DEFAULT
);
633 .rtm_flags
= RTM_F_CLONED
,
635 int flags
= NLM_F_DUMP
;
644 clr
.size
= sizeof(struct rtgenmsg
);
647 clr
.size
= sizeof(struct rtmsg
);
656 clr
.msg
= nlmsg_alloc_simple(type
, flags
);
660 nlmsg_append(clr
.msg
, &rtm
, clr
.size
, 0);
661 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb_clear_event
, &clr
);
662 nl_cb_set(cb
, NL_CB_FINISH
, NL_CB_CUSTOM
, cb_finish_event
, &pending
);
663 nl_cb_err(cb
, NL_CB_CUSTOM
, error_handler
, &pending
);
665 nl_send_auto_complete(sock_rtnl
, clr
.msg
);
667 nl_recvmsgs(sock_rtnl
, cb
);
675 * Clear bridge (membership) state and bring down device
677 void system_if_clear_state(struct device
*dev
)
679 static char buf
[256];
682 device_set_ifindex(dev
, system_if_resolve(dev
));
683 if (dev
->external
|| !dev
->ifindex
)
686 system_if_flags(dev
->ifname
, 0, IFF_UP
);
688 if (system_is_bridge(dev
->ifname
, buf
, sizeof(buf
))) {
689 D(SYSTEM
, "Delete existing bridge named '%s'\n", dev
->ifname
);
690 system_bridge_delbr(dev
);
694 bridge
= system_get_bridge(dev
->ifname
, buf
, sizeof(buf
));
696 D(SYSTEM
, "Remove device '%s' from bridge '%s'\n", dev
->ifname
, bridge
);
697 system_bridge_if(bridge
, dev
, SIOCBRDELIF
, NULL
);
700 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET
);
701 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET
);
702 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET6
);
703 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET6
);
704 system_set_disable_ipv6(dev
, "0");
707 static inline unsigned long
708 sec_to_jiffies(int val
)
710 return (unsigned long) val
* 100;
713 int system_bridge_addbr(struct device
*bridge
, struct bridge_config
*cfg
)
715 unsigned long args
[4] = {};
717 if (ioctl(sock_ioctl
, SIOCBRADDBR
, bridge
->ifname
) < 0)
720 args
[0] = BRCTL_SET_BRIDGE_STP_STATE
;
721 args
[1] = !!cfg
->stp
;
722 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
724 args
[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY
;
725 args
[1] = sec_to_jiffies(cfg
->forward_delay
);
726 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
728 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
729 bridge
->ifname
, cfg
->igmp_snoop
? "1" : "0");
731 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
732 bridge
->ifname
, cfg
->igmp_snoop
? "1" : "0");
734 args
[0] = BRCTL_SET_BRIDGE_PRIORITY
;
735 args
[1] = cfg
->priority
;
736 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
738 if (cfg
->flags
& BRIDGE_OPT_AGEING_TIME
) {
739 args
[0] = BRCTL_SET_AGEING_TIME
;
740 args
[1] = sec_to_jiffies(cfg
->ageing_time
);
741 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
744 if (cfg
->flags
& BRIDGE_OPT_HELLO_TIME
) {
745 args
[0] = BRCTL_SET_BRIDGE_HELLO_TIME
;
746 args
[1] = sec_to_jiffies(cfg
->hello_time
);
747 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
750 if (cfg
->flags
& BRIDGE_OPT_MAX_AGE
) {
751 args
[0] = BRCTL_SET_BRIDGE_MAX_AGE
;
752 args
[1] = sec_to_jiffies(cfg
->max_age
);
753 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
759 int system_macvlan_add(struct device
*macvlan
, struct device
*dev
, struct macvlan_config
*cfg
)
762 struct nlattr
*linkinfo
, *data
;
763 struct ifinfomsg iim
= { .ifi_family
= AF_UNSPEC
, };
764 int ifindex
= system_if_resolve(dev
);
766 static const struct {
768 enum macvlan_mode val
;
770 { "private", MACVLAN_MODE_PRIVATE
},
771 { "vepa", MACVLAN_MODE_VEPA
},
772 { "bridge", MACVLAN_MODE_BRIDGE
},
773 { "passthru", MACVLAN_MODE_PASSTHRU
},
779 msg
= nlmsg_alloc_simple(RTM_NEWLINK
, NLM_F_REQUEST
| NLM_F_CREATE
| NLM_F_EXCL
);
784 nlmsg_append(msg
, &iim
, sizeof(iim
), 0);
786 if (cfg
->flags
& MACVLAN_OPT_MACADDR
)
787 nla_put(msg
, IFLA_ADDRESS
, sizeof(cfg
->macaddr
), cfg
->macaddr
);
788 nla_put_string(msg
, IFLA_IFNAME
, macvlan
->ifname
);
789 nla_put_u32(msg
, IFLA_LINK
, ifindex
);
791 if (!(linkinfo
= nla_nest_start(msg
, IFLA_LINKINFO
)))
792 goto nla_put_failure
;
794 nla_put_string(msg
, IFLA_INFO_KIND
, "macvlan");
796 if (!(data
= nla_nest_start(msg
, IFLA_INFO_DATA
)))
797 goto nla_put_failure
;
800 for (i
= 0; i
< ARRAY_SIZE(modes
); i
++) {
801 if (strcmp(cfg
->mode
, modes
[i
].name
) != 0)
804 nla_put_u32(msg
, IFLA_MACVLAN_MODE
, modes
[i
].val
);
809 nla_nest_end(msg
, data
);
810 nla_nest_end(msg
, linkinfo
);
812 rv
= system_rtnl_call(msg
);
814 D(SYSTEM
, "Error adding macvlan '%s' over '%s': %d\n", macvlan
->ifname
, dev
->ifname
, rv
);
823 static int system_link_del(const char *ifname
)
826 struct ifinfomsg iim
= {
827 .ifi_family
= AF_UNSPEC
,
831 msg
= nlmsg_alloc_simple(RTM_DELLINK
, NLM_F_REQUEST
);
836 nlmsg_append(msg
, &iim
, sizeof(iim
), 0);
837 nla_put_string(msg
, IFLA_IFNAME
, ifname
);
838 return system_rtnl_call(msg
);
841 int system_macvlan_del(struct device
*macvlan
)
843 return system_link_del(macvlan
->ifname
);
846 static int system_vlan(struct device
*dev
, int id
)
848 struct vlan_ioctl_args ifr
= {
849 .cmd
= SET_VLAN_NAME_TYPE_CMD
,
850 .u
.name_type
= VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD
,
853 ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
856 ifr
.cmd
= DEL_VLAN_CMD
;
859 ifr
.cmd
= ADD_VLAN_CMD
;
862 strncpy(ifr
.device1
, dev
->ifname
, sizeof(ifr
.device1
));
863 return ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
866 int system_vlan_add(struct device
*dev
, int id
)
868 return system_vlan(dev
, id
);
871 int system_vlan_del(struct device
*dev
)
873 return system_vlan(dev
, -1);
876 int system_vlandev_add(struct device
*vlandev
, struct device
*dev
, struct vlandev_config
*cfg
)
879 struct nlattr
*linkinfo
, *data
;
880 struct ifinfomsg iim
= { .ifi_family
= AF_UNSPEC
};
881 int ifindex
= system_if_resolve(dev
);
887 msg
= nlmsg_alloc_simple(RTM_NEWLINK
, NLM_F_REQUEST
| NLM_F_CREATE
| NLM_F_EXCL
);
892 nlmsg_append(msg
, &iim
, sizeof(iim
), 0);
893 nla_put_string(msg
, IFLA_IFNAME
, vlandev
->ifname
);
894 nla_put_u32(msg
, IFLA_LINK
, ifindex
);
896 if (!(linkinfo
= nla_nest_start(msg
, IFLA_LINKINFO
)))
897 goto nla_put_failure
;
899 nla_put_string(msg
, IFLA_INFO_KIND
, "vlan");
901 if (!(data
= nla_nest_start(msg
, IFLA_INFO_DATA
)))
902 goto nla_put_failure
;
904 nla_put_u16(msg
, IFLA_VLAN_ID
, cfg
->vid
);
906 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
907 nla_put_u16(msg
, IFLA_VLAN_PROTOCOL
, htons(cfg
->proto
));
909 if(cfg
->proto
== VLAN_PROTO_8021AD
)
910 netifd_log_message(L_WARNING
, "%s Your kernel is older than linux 3.10.0, 802.1ad is not supported defaulting to 802.1q", vlandev
->type
->name
);
913 nla_nest_end(msg
, data
);
914 nla_nest_end(msg
, linkinfo
);
916 rv
= system_rtnl_call(msg
);
918 D(SYSTEM
, "Error adding vlandev '%s' over '%s': %d\n", vlandev
->ifname
, dev
->ifname
, rv
);
927 int system_vlandev_del(struct device
*vlandev
)
929 return system_link_del(vlandev
->ifname
);
933 system_if_get_settings(struct device
*dev
, struct device_settings
*s
)
938 memset(&ifr
, 0, sizeof(ifr
));
939 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
941 if (ioctl(sock_ioctl
, SIOCGIFMTU
, &ifr
) == 0) {
942 s
->mtu
= ifr
.ifr_mtu
;
943 s
->flags
|= DEV_OPT_MTU
;
946 if (ioctl(sock_ioctl
, SIOCGIFTXQLEN
, &ifr
) == 0) {
947 s
->txqueuelen
= ifr
.ifr_qlen
;
948 s
->flags
|= DEV_OPT_TXQUEUELEN
;
951 if (ioctl(sock_ioctl
, SIOCGIFHWADDR
, &ifr
) == 0) {
952 memcpy(s
->macaddr
, &ifr
.ifr_hwaddr
.sa_data
, sizeof(s
->macaddr
));
953 s
->flags
|= DEV_OPT_MACADDR
;
956 if (!system_get_disable_ipv6(dev
, buf
, sizeof(buf
))) {
957 s
->ipv6
= !strtoul(buf
, NULL
, 0);
958 s
->flags
|= DEV_OPT_IPV6
;
961 if (ioctl(sock_ioctl
, SIOCGIFFLAGS
, &ifr
) == 0) {
962 s
->promisc
= ifr
.ifr_flags
& IFF_PROMISC
;
963 s
->flags
|= DEV_OPT_PROMISC
;
968 system_if_apply_settings(struct device
*dev
, struct device_settings
*s
, unsigned int apply_mask
)
975 memset(&ifr
, 0, sizeof(ifr
));
976 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
977 if (s
->flags
& DEV_OPT_MTU
& apply_mask
) {
978 ifr
.ifr_mtu
= s
->mtu
;
979 if (ioctl(sock_ioctl
, SIOCSIFMTU
, &ifr
) < 0)
980 s
->flags
&= ~DEV_OPT_MTU
;
982 if (s
->flags
& DEV_OPT_TXQUEUELEN
& apply_mask
) {
983 ifr
.ifr_qlen
= s
->txqueuelen
;
984 if (ioctl(sock_ioctl
, SIOCSIFTXQLEN
, &ifr
) < 0)
985 s
->flags
&= ~DEV_OPT_TXQUEUELEN
;
987 if ((s
->flags
& DEV_OPT_MACADDR
& apply_mask
) && !dev
->external
) {
988 ifr
.ifr_hwaddr
.sa_family
= ARPHRD_ETHER
;
989 memcpy(&ifr
.ifr_hwaddr
.sa_data
, s
->macaddr
, sizeof(s
->macaddr
));
990 if (ioctl(sock_ioctl
, SIOCSIFHWADDR
, &ifr
) < 0)
991 s
->flags
&= ~DEV_OPT_MACADDR
;
993 if (s
->flags
& DEV_OPT_IPV6
& apply_mask
)
994 system_set_disable_ipv6(dev
, s
->ipv6
? "0" : "1");
995 if (s
->flags
& DEV_OPT_PROMISC
& apply_mask
) {
996 if (system_if_flags(dev
->ifname
, s
->promisc
? IFF_PROMISC
: 0,
997 !s
->promisc
? IFF_PROMISC
: 0) < 0)
998 s
->flags
&= ~DEV_OPT_PROMISC
;
1002 int system_if_up(struct device
*dev
)
1004 system_if_get_settings(dev
, &dev
->orig_settings
);
1005 system_if_apply_settings(dev
, &dev
->settings
, dev
->settings
.flags
);
1006 device_set_ifindex(dev
, system_if_resolve(dev
));
1007 return system_if_flags(dev
->ifname
, IFF_UP
, 0);
1010 int system_if_down(struct device
*dev
)
1012 int ret
= system_if_flags(dev
->ifname
, 0, IFF_UP
);
1013 dev
->orig_settings
.flags
&= dev
->settings
.flags
;
1014 system_if_apply_settings(dev
, &dev
->orig_settings
, dev
->orig_settings
.flags
);
1018 struct if_check_data
{
1024 static int cb_if_check_valid(struct nl_msg
*msg
, void *arg
)
1026 struct nlmsghdr
*nh
= nlmsg_hdr(msg
);
1027 struct ifinfomsg
*ifi
= NLMSG_DATA(nh
);
1028 struct if_check_data
*chk
= (struct if_check_data
*)arg
;
1030 if (nh
->nlmsg_type
!= RTM_NEWLINK
)
1033 device_set_present(chk
->dev
, ifi
->ifi_index
> 0 ? true : false);
1034 device_set_link(chk
->dev
, ifi
->ifi_flags
& IFF_LOWER_UP
? true : false);
1039 static int cb_if_check_ack(struct nl_msg
*msg
, void *arg
)
1041 struct if_check_data
*chk
= (struct if_check_data
*)arg
;
1046 static int cb_if_check_error(struct sockaddr_nl
*nla
, struct nlmsgerr
*err
, void *arg
)
1048 struct if_check_data
*chk
= (struct if_check_data
*)arg
;
1050 device_set_present(chk
->dev
, false);
1051 device_set_link(chk
->dev
, false);
1052 chk
->pending
= err
->error
;
1057 int system_if_check(struct device
*dev
)
1059 struct nl_cb
*cb
= nl_cb_alloc(NL_CB_DEFAULT
);
1061 struct ifinfomsg ifi
= {
1062 .ifi_family
= AF_UNSPEC
,
1065 struct if_check_data chk
= {
1071 msg
= nlmsg_alloc_simple(RTM_GETLINK
, 0);
1072 if (!msg
|| nlmsg_append(msg
, &ifi
, sizeof(ifi
), 0) ||
1073 nla_put_string(msg
, IFLA_IFNAME
, dev
->ifname
))
1076 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb_if_check_valid
, &chk
);
1077 nl_cb_set(cb
, NL_CB_ACK
, NL_CB_CUSTOM
, cb_if_check_ack
, &chk
);
1078 nl_cb_err(cb
, NL_CB_CUSTOM
, cb_if_check_error
, &chk
);
1080 nl_send_auto_complete(sock_rtnl
, msg
);
1081 while (chk
.pending
> 0)
1082 nl_recvmsgs(sock_rtnl
, cb
);
1093 system_if_get_parent(struct device
*dev
)
1095 char buf
[64], *devname
;
1096 int ifindex
, iflink
, len
;
1099 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/iflink", dev
->ifname
);
1100 f
= fopen(buf
, "r");
1104 len
= fread(buf
, 1, sizeof(buf
) - 1, f
);
1111 iflink
= strtoul(buf
, NULL
, 0);
1112 ifindex
= system_if_resolve(dev
);
1113 if (!iflink
|| iflink
== ifindex
)
1116 devname
= if_indextoname(iflink
, buf
);
1120 return device_get(devname
, true);
1124 read_string_file(int dir_fd
, const char *file
, char *buf
, int len
)
1130 fd
= openat(dir_fd
, file
, O_RDONLY
);
1135 len
= read(fd
, buf
, len
- 1);
1139 } else if (len
> 0) {
1142 c
= strchr(buf
, '\n');
1155 read_uint64_file(int dir_fd
, const char *file
, uint64_t *val
)
1160 ret
= read_string_file(dir_fd
, file
, buf
, sizeof(buf
));
1162 *val
= strtoull(buf
, NULL
, 0);
1167 /* Assume advertised flags == supported flags */
1168 static const struct {
1171 } ethtool_link_modes
[] = {
1172 { ADVERTISED_10baseT_Half
, "10H" },
1173 { ADVERTISED_10baseT_Full
, "10F" },
1174 { ADVERTISED_100baseT_Half
, "100H" },
1175 { ADVERTISED_100baseT_Full
, "100F" },
1176 { ADVERTISED_1000baseT_Half
, "1000H" },
1177 { ADVERTISED_1000baseT_Full
, "1000F" },
1180 static void system_add_link_modes(struct blob_buf
*b
, __u32 mask
)
1183 for (i
= 0; i
< ARRAY_SIZE(ethtool_link_modes
); i
++) {
1184 if (mask
& ethtool_link_modes
[i
].mask
)
1185 blobmsg_add_string(b
, NULL
, ethtool_link_modes
[i
].name
);
1190 system_if_force_external(const char *ifname
)
1195 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/phy80211", ifname
);
1196 return stat(buf
, &s
) == 0;
1200 system_if_dump_info(struct device
*dev
, struct blob_buf
*b
)
1202 struct ethtool_cmd ecmd
;
1208 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s", dev
->ifname
);
1209 dir_fd
= open(buf
, O_DIRECTORY
);
1211 memset(&ecmd
, 0, sizeof(ecmd
));
1212 memset(&ifr
, 0, sizeof(ifr
));
1213 strcpy(ifr
.ifr_name
, dev
->ifname
);
1214 ifr
.ifr_data
= (caddr_t
) &ecmd
;
1215 ecmd
.cmd
= ETHTOOL_GSET
;
1217 if (ioctl(sock_ioctl
, SIOCETHTOOL
, &ifr
) == 0) {
1218 c
= blobmsg_open_array(b
, "link-advertising");
1219 system_add_link_modes(b
, ecmd
.advertising
);
1220 blobmsg_close_array(b
, c
);
1222 c
= blobmsg_open_array(b
, "link-supported");
1223 system_add_link_modes(b
, ecmd
.supported
);
1224 blobmsg_close_array(b
, c
);
1226 s
= blobmsg_alloc_string_buffer(b
, "speed", 8);
1227 snprintf(s
, 8, "%d%c", ethtool_cmd_speed(&ecmd
),
1228 ecmd
.duplex
== DUPLEX_HALF
? 'H' : 'F');
1229 blobmsg_add_string_buffer(b
);
1237 system_if_dump_stats(struct device
*dev
, struct blob_buf
*b
)
1239 const char *const counters
[] = {
1240 "collisions", "rx_frame_errors", "tx_compressed",
1241 "multicast", "rx_length_errors", "tx_dropped",
1242 "rx_bytes", "rx_missed_errors", "tx_errors",
1243 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1244 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1245 "rx_dropped", "tx_aborted_errors", "tx_packets",
1246 "rx_errors", "tx_bytes", "tx_window_errors",
1247 "rx_fifo_errors", "tx_carrier_errors",
1254 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/statistics", dev
->ifname
);
1255 stats_dir
= open(buf
, O_DIRECTORY
);
1259 for (i
= 0; i
< ARRAY_SIZE(counters
); i
++)
1260 if (read_uint64_file(stats_dir
, counters
[i
], &val
))
1261 blobmsg_add_u64(b
, counters
[i
], val
);
1267 static int system_addr(struct device
*dev
, struct device_addr
*addr
, int cmd
)
1269 bool v4
= ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
);
1270 int alen
= v4
? 4 : 16;
1271 unsigned int flags
= 0;
1272 struct ifaddrmsg ifa
= {
1273 .ifa_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1274 .ifa_prefixlen
= addr
->mask
,
1275 .ifa_index
= dev
->ifindex
,
1279 if (cmd
== RTM_NEWADDR
)
1280 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
1282 msg
= nlmsg_alloc_simple(cmd
, flags
);
1286 nlmsg_append(msg
, &ifa
, sizeof(ifa
), 0);
1287 nla_put(msg
, IFA_LOCAL
, alen
, &addr
->addr
);
1289 if (addr
->broadcast
)
1290 nla_put_u32(msg
, IFA_BROADCAST
, addr
->broadcast
);
1291 if (addr
->point_to_point
)
1292 nla_put_u32(msg
, IFA_ADDRESS
, addr
->point_to_point
);
1294 time_t now
= system_get_rtime();
1295 struct ifa_cacheinfo cinfo
= {0xffffffffU
, 0xffffffffU
, 0, 0};
1297 if (addr
->preferred_until
) {
1298 int64_t preferred
= addr
->preferred_until
- now
;
1301 else if (preferred
> UINT32_MAX
)
1302 preferred
= UINT32_MAX
;
1304 cinfo
.ifa_prefered
= preferred
;
1307 if (addr
->valid_until
) {
1308 int64_t valid
= addr
->valid_until
- now
;
1311 else if (valid
> UINT32_MAX
)
1314 cinfo
.ifa_valid
= valid
;
1317 nla_put(msg
, IFA_CACHEINFO
, sizeof(cinfo
), &cinfo
);
1320 return system_rtnl_call(msg
);
1323 int system_add_address(struct device
*dev
, struct device_addr
*addr
)
1325 return system_addr(dev
, addr
, RTM_NEWADDR
);
1328 int system_del_address(struct device
*dev
, struct device_addr
*addr
)
1330 return system_addr(dev
, addr
, RTM_DELADDR
);
1333 static int system_rt(struct device
*dev
, struct device_route
*route
, int cmd
)
1335 int alen
= ((route
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
) ? 4 : 16;
1337 unsigned int flags
= 0;
1340 have_gw
= !!route
->nexthop
.in
.s_addr
;
1342 have_gw
= route
->nexthop
.in6
.s6_addr32
[0] ||
1343 route
->nexthop
.in6
.s6_addr32
[1] ||
1344 route
->nexthop
.in6
.s6_addr32
[2] ||
1345 route
->nexthop
.in6
.s6_addr32
[3];
1347 unsigned int table
= (route
->flags
& (DEVROUTE_TABLE
| DEVROUTE_SRCTABLE
))
1348 ? route
->table
: RT_TABLE_MAIN
;
1350 struct rtmsg rtm
= {
1351 .rtm_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1352 .rtm_dst_len
= route
->mask
,
1353 .rtm_src_len
= route
->sourcemask
,
1354 .rtm_table
= (table
< 256) ? table
: RT_TABLE_UNSPEC
,
1355 .rtm_protocol
= (route
->flags
& DEVADDR_KERNEL
) ? RTPROT_KERNEL
: RTPROT_STATIC
,
1356 .rtm_scope
= RT_SCOPE_NOWHERE
,
1357 .rtm_type
= (cmd
== RTM_DELROUTE
) ? 0: RTN_UNICAST
,
1358 .rtm_flags
= (route
->flags
& DEVROUTE_ONLINK
) ? RTNH_F_ONLINK
: 0,
1362 if (cmd
== RTM_NEWROUTE
) {
1363 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
1365 if (!dev
) { // Add null-route
1366 rtm
.rtm_scope
= RT_SCOPE_UNIVERSE
;
1367 rtm
.rtm_type
= RTN_UNREACHABLE
;
1370 rtm
.rtm_scope
= (have_gw
) ? RT_SCOPE_UNIVERSE
: RT_SCOPE_LINK
;
1373 if (route
->flags
& DEVROUTE_TYPE
) {
1374 rtm
.rtm_type
= route
->type
;
1375 if (!(route
->flags
& (DEVROUTE_TABLE
| DEVROUTE_SRCTABLE
))) {
1376 if (rtm
.rtm_type
== RTN_LOCAL
|| rtm
.rtm_type
== RTN_BROADCAST
||
1377 rtm
.rtm_type
== RTN_NAT
|| rtm
.rtm_type
== RTN_ANYCAST
)
1378 rtm
.rtm_table
= RT_TABLE_LOCAL
;
1381 if (rtm
.rtm_type
== RTN_LOCAL
|| rtm
.rtm_type
== RTN_NAT
)
1382 rtm
.rtm_scope
= RT_SCOPE_HOST
;
1383 else if (rtm
.rtm_type
== RTN_BROADCAST
|| rtm
.rtm_type
== RTN_MULTICAST
||
1384 rtm
.rtm_type
== RTN_ANYCAST
)
1385 rtm
.rtm_scope
= RT_SCOPE_LINK
;
1388 msg
= nlmsg_alloc_simple(cmd
, flags
);
1392 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
1395 nla_put(msg
, RTA_DST
, alen
, &route
->addr
);
1397 if (route
->sourcemask
)
1398 nla_put(msg
, RTA_SRC
, alen
, &route
->source
);
1400 if (route
->metric
> 0)
1401 nla_put_u32(msg
, RTA_PRIORITY
, route
->metric
);
1404 nla_put(msg
, RTA_GATEWAY
, alen
, &route
->nexthop
);
1407 nla_put_u32(msg
, RTA_OIF
, dev
->ifindex
);
1410 nla_put_u32(msg
, RTA_TABLE
, table
);
1412 if (route
->flags
& DEVROUTE_MTU
) {
1413 struct nlattr
*metrics
;
1415 if (!(metrics
= nla_nest_start(msg
, RTA_METRICS
)))
1416 goto nla_put_failure
;
1418 nla_put_u32(msg
, RTAX_MTU
, route
->mtu
);
1420 nla_nest_end(msg
, metrics
);
1423 return system_rtnl_call(msg
);
1430 int system_add_route(struct device
*dev
, struct device_route
*route
)
1432 return system_rt(dev
, route
, RTM_NEWROUTE
);
1435 int system_del_route(struct device
*dev
, struct device_route
*route
)
1437 return system_rt(dev
, route
, RTM_DELROUTE
);
1440 int system_flush_routes(void)
1442 const char *names
[] = {
1443 "/proc/sys/net/ipv4/route/flush",
1444 "/proc/sys/net/ipv6/route/flush"
1448 for (i
= 0; i
< ARRAY_SIZE(names
); i
++) {
1449 fd
= open(names
[i
], O_WRONLY
);
1453 if (write(fd
, "-1", 2)) {}
1459 bool system_resolve_rt_type(const char *type
, unsigned int *id
)
1461 return system_rtn_aton(type
, id
);
1464 bool system_resolve_rt_table(const char *name
, unsigned int *id
)
1468 unsigned int n
, table
= RT_TABLE_UNSPEC
;
1470 /* first try to parse table as number */
1471 if ((n
= strtoul(name
, &e
, 0)) > 0 && !*e
)
1474 /* handle well known aliases */
1475 else if (!strcmp(name
, "default"))
1476 table
= RT_TABLE_DEFAULT
;
1477 else if (!strcmp(name
, "main"))
1478 table
= RT_TABLE_MAIN
;
1479 else if (!strcmp(name
, "local"))
1480 table
= RT_TABLE_LOCAL
;
1482 /* try to look up name in /etc/iproute2/rt_tables */
1483 else if ((f
= fopen("/etc/iproute2/rt_tables", "r")) != NULL
)
1485 while (fgets(buf
, sizeof(buf
) - 1, f
) != NULL
)
1487 if ((e
= strtok(buf
, " \t\n")) == NULL
|| *e
== '#')
1490 n
= strtoul(e
, NULL
, 10);
1491 e
= strtok(NULL
, " \t\n");
1493 if (e
&& !strcmp(e
, name
))
1503 if (table
== RT_TABLE_UNSPEC
)
1510 bool system_is_default_rt_table(unsigned int id
)
1512 return (id
== RT_TABLE_MAIN
);
1515 static int system_iprule(struct iprule
*rule
, int cmd
)
1517 int alen
= ((rule
->flags
& IPRULE_FAMILY
) == IPRULE_INET4
) ? 4 : 16;
1520 struct rtmsg rtm
= {
1521 .rtm_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1522 .rtm_protocol
= RTPROT_STATIC
,
1523 .rtm_scope
= RT_SCOPE_UNIVERSE
,
1524 .rtm_table
= RT_TABLE_UNSPEC
,
1525 .rtm_type
= RTN_UNSPEC
,
1529 if (cmd
== RTM_NEWRULE
) {
1530 rtm
.rtm_type
= RTN_UNICAST
;
1531 rtm
.rtm_flags
|= NLM_F_REPLACE
| NLM_F_EXCL
;
1535 rtm
.rtm_flags
|= FIB_RULE_INVERT
;
1537 if (rule
->flags
& IPRULE_SRC
)
1538 rtm
.rtm_src_len
= rule
->src_mask
;
1540 if (rule
->flags
& IPRULE_DEST
)
1541 rtm
.rtm_dst_len
= rule
->dest_mask
;
1543 if (rule
->flags
& IPRULE_TOS
)
1544 rtm
.rtm_tos
= rule
->tos
;
1546 if (rule
->flags
& IPRULE_LOOKUP
) {
1547 if (rule
->lookup
< 256)
1548 rtm
.rtm_table
= rule
->lookup
;
1551 if (rule
->flags
& IPRULE_ACTION
)
1552 rtm
.rtm_type
= rule
->action
;
1553 else if (rule
->flags
& IPRULE_GOTO
)
1554 rtm
.rtm_type
= FR_ACT_GOTO
;
1555 else if (!(rule
->flags
& (IPRULE_LOOKUP
| IPRULE_ACTION
| IPRULE_GOTO
)))
1556 rtm
.rtm_type
= FR_ACT_NOP
;
1558 msg
= nlmsg_alloc_simple(cmd
, NLM_F_REQUEST
);
1563 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
1565 if (rule
->flags
& IPRULE_IN
)
1566 nla_put(msg
, FRA_IFNAME
, strlen(rule
->in_dev
) + 1, rule
->in_dev
);
1568 if (rule
->flags
& IPRULE_OUT
)
1569 nla_put(msg
, FRA_OIFNAME
, strlen(rule
->out_dev
) + 1, rule
->out_dev
);
1571 if (rule
->flags
& IPRULE_SRC
)
1572 nla_put(msg
, FRA_SRC
, alen
, &rule
->src_addr
);
1574 if (rule
->flags
& IPRULE_DEST
)
1575 nla_put(msg
, FRA_DST
, alen
, &rule
->dest_addr
);
1577 if (rule
->flags
& IPRULE_PRIORITY
)
1578 nla_put_u32(msg
, FRA_PRIORITY
, rule
->priority
);
1579 else if (cmd
== RTM_NEWRULE
)
1580 nla_put_u32(msg
, FRA_PRIORITY
, rule
->order
);
1582 if (rule
->flags
& IPRULE_FWMARK
)
1583 nla_put_u32(msg
, FRA_FWMARK
, rule
->fwmark
);
1585 if (rule
->flags
& IPRULE_FWMASK
)
1586 nla_put_u32(msg
, FRA_FWMASK
, rule
->fwmask
);
1588 if (rule
->flags
& IPRULE_LOOKUP
) {
1589 if (rule
->lookup
>= 256)
1590 nla_put_u32(msg
, FRA_TABLE
, rule
->lookup
);
1593 if (rule
->flags
& IPRULE_GOTO
)
1594 nla_put_u32(msg
, FRA_GOTO
, rule
->gotoid
);
1596 return system_rtnl_call(msg
);
1599 int system_add_iprule(struct iprule
*rule
)
1601 return system_iprule(rule
, RTM_NEWRULE
);
1604 int system_del_iprule(struct iprule
*rule
)
1606 return system_iprule(rule
, RTM_DELRULE
);
1609 int system_flush_iprules(void)
1614 system_if_clear_entries(NULL
, RTM_GETRULE
, AF_INET
);
1615 system_if_clear_entries(NULL
, RTM_GETRULE
, AF_INET6
);
1617 memset(&rule
, 0, sizeof(rule
));
1620 rule
.flags
= IPRULE_INET4
| IPRULE_PRIORITY
| IPRULE_LOOKUP
;
1623 rule
.lookup
= RT_TABLE_LOCAL
;
1624 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1626 rule
.priority
= 32766;
1627 rule
.lookup
= RT_TABLE_MAIN
;
1628 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1630 rule
.priority
= 32767;
1631 rule
.lookup
= RT_TABLE_DEFAULT
;
1632 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1635 rule
.flags
= IPRULE_INET6
| IPRULE_PRIORITY
| IPRULE_LOOKUP
;
1638 rule
.lookup
= RT_TABLE_LOCAL
;
1639 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1641 rule
.priority
= 32766;
1642 rule
.lookup
= RT_TABLE_MAIN
;
1643 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1648 bool system_resolve_iprule_action(const char *action
, unsigned int *id
)
1650 return system_rtn_aton(action
, id
);
1653 time_t system_get_rtime(void)
1658 if (syscall(__NR_clock_gettime
, CLOCK_MONOTONIC
, &ts
) == 0)
1661 if (gettimeofday(&tv
, NULL
) == 0)
1668 #define IP_DF 0x4000
1671 static int tunnel_ioctl(const char *name
, int cmd
, void *p
)
1675 memset(&ifr
, 0, sizeof(ifr
));
1676 strncpy(ifr
.ifr_name
, name
, sizeof(ifr
.ifr_name
));
1677 ifr
.ifr_ifru
.ifru_data
= p
;
1678 return ioctl(sock_ioctl
, cmd
, &ifr
);
1681 #ifdef IFLA_IPTUN_MAX
1682 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
1683 static int system_add_gre_tunnel(const char *name
, const char *kind
,
1684 const unsigned int link
, struct blob_attr
**tb
, bool v6
)
1687 struct ifinfomsg ifi
= { .ifi_family
= AF_UNSPEC
, };
1688 struct blob_attr
*cur
;
1689 uint32_t ikey
= 0, okey
= 0, flags
= 0, flowinfo
= 0;
1690 uint16_t iflags
= 0, oflags
= 0;
1692 int ret
= 0, ttl
= 64;
1694 nlm
= nlmsg_alloc_simple(RTM_NEWLINK
, NLM_F_REQUEST
| NLM_F_REPLACE
| NLM_F_CREATE
);
1698 nlmsg_append(nlm
, &ifi
, sizeof(ifi
), 0);
1699 nla_put_string(nlm
, IFLA_IFNAME
, name
);
1701 struct nlattr
*linkinfo
= nla_nest_start(nlm
, IFLA_LINKINFO
);
1707 nla_put_string(nlm
, IFLA_INFO_KIND
, kind
);
1708 struct nlattr
*infodata
= nla_nest_start(nlm
, IFLA_INFO_DATA
);
1715 nla_put_u32(nlm
, IFLA_GRE_LINK
, link
);
1717 if ((cur
= tb
[TUNNEL_ATTR_TTL
]))
1718 ttl
= blobmsg_get_u32(cur
);
1720 nla_put_u8(nlm
, IFLA_GRE_TTL
, ttl
);
1722 if ((cur
= tb
[TUNNEL_ATTR_TOS
])) {
1723 char *str
= blobmsg_get_string(cur
);
1724 if (strcmp(str
, "inherit")) {
1727 if (!system_tos_aton(str
, &uval
)) {
1733 flowinfo
|= htonl(uval
<< 20) & IP6_FLOWINFO_TCLASS
;
1738 flags
|= IP6_TNL_F_USE_ORIG_TCLASS
;
1744 if ((cur
= tb
[TUNNEL_ATTR_INFO
]) && (blobmsg_type(cur
) == BLOBMSG_TYPE_STRING
)) {
1745 uint8_t icsum
, ocsum
, iseqno
, oseqno
;
1746 if (sscanf(blobmsg_get_string(cur
), "%u,%u,%hhu,%hhu,%hhu,%hhu",
1747 &ikey
, &okey
, &icsum
, &ocsum
, &iseqno
, &oseqno
) < 6) {
1772 struct in6_addr in6buf
;
1773 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
])) {
1774 if (inet_pton(AF_INET6
, blobmsg_data(cur
), &in6buf
) < 1) {
1778 nla_put(nlm
, IFLA_GRE_LOCAL
, sizeof(in6buf
), &in6buf
);
1781 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
])) {
1782 if (inet_pton(AF_INET6
, blobmsg_data(cur
), &in6buf
) < 1) {
1786 nla_put(nlm
, IFLA_GRE_REMOTE
, sizeof(in6buf
), &in6buf
);
1788 nla_put_u8(nlm
, IFLA_GRE_ENCAP_LIMIT
, 4);
1791 nla_put_u32(nlm
, IFLA_GRE_FLOWINFO
, flowinfo
);
1794 nla_put_u32(nlm
, IFLA_GRE_FLAGS
, flags
);
1796 struct in_addr inbuf
;
1799 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
])) {
1800 if (inet_pton(AF_INET
, blobmsg_data(cur
), &inbuf
) < 1) {
1804 nla_put(nlm
, IFLA_GRE_LOCAL
, sizeof(inbuf
), &inbuf
);
1807 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
])) {
1808 if (inet_pton(AF_INET
, blobmsg_data(cur
), &inbuf
) < 1) {
1812 nla_put(nlm
, IFLA_GRE_REMOTE
, sizeof(inbuf
), &inbuf
);
1814 if (IN_MULTICAST(ntohl(inbuf
.s_addr
))) {
1816 okey
= inbuf
.s_addr
;
1821 ikey
= inbuf
.s_addr
;
1827 if ((cur
= tb
[TUNNEL_ATTR_DF
]))
1828 set_df
= blobmsg_get_bool(cur
);
1830 /* ttl !=0 and nopmtudisc are incompatible */
1831 if (ttl
&& !set_df
) {
1836 nla_put_u8(nlm
, IFLA_GRE_PMTUDISC
, set_df
? 1 : 0);
1838 nla_put_u8(nlm
, IFLA_GRE_TOS
, tos
);
1842 nla_put_u16(nlm
, IFLA_GRE_OFLAGS
, oflags
);
1845 nla_put_u16(nlm
, IFLA_GRE_IFLAGS
, iflags
);
1848 nla_put_u32(nlm
, IFLA_GRE_OKEY
, okey
);
1851 nla_put_u32(nlm
, IFLA_GRE_IKEY
, ikey
);
1853 nla_nest_end(nlm
, infodata
);
1854 nla_nest_end(nlm
, linkinfo
);
1856 return system_rtnl_call(nlm
);
1864 static int system_add_proto_tunnel(const char *name
, const uint8_t proto
, const unsigned int link
, struct blob_attr
**tb
)
1866 struct blob_attr
*cur
;
1868 struct ip_tunnel_parm p
= {
1877 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
]) &&
1878 inet_pton(AF_INET
, blobmsg_data(cur
), &p
.iph
.saddr
) < 1)
1881 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
]) &&
1882 inet_pton(AF_INET
, blobmsg_data(cur
), &p
.iph
.daddr
) < 1)
1885 if ((cur
= tb
[TUNNEL_ATTR_DF
]))
1886 set_df
= blobmsg_get_bool(cur
);
1888 if ((cur
= tb
[TUNNEL_ATTR_TTL
]))
1889 p
.iph
.ttl
= blobmsg_get_u32(cur
);
1891 if ((cur
= tb
[TUNNEL_ATTR_TOS
])) {
1892 char *str
= blobmsg_get_string(cur
);
1893 if (strcmp(str
, "inherit")) {
1896 if (!system_tos_aton(str
, &uval
))
1904 p
.iph
.frag_off
= set_df
? htons(IP_DF
) : 0;
1905 /* ttl !=0 and nopmtudisc are incompatible */
1906 if (p
.iph
.ttl
&& p
.iph
.frag_off
== 0)
1909 strncpy(p
.name
, name
, sizeof(p
.name
));
1911 switch (p
.iph
.protocol
) {
1913 return tunnel_ioctl("tunl0", SIOCADDTUNNEL
, &p
);
1915 return tunnel_ioctl("sit0", SIOCADDTUNNEL
, &p
);
1922 static int __system_del_ip_tunnel(const char *name
, struct blob_attr
**tb
)
1924 struct blob_attr
*cur
;
1927 if (!(cur
= tb
[TUNNEL_ATTR_TYPE
]))
1929 str
= blobmsg_data(cur
);
1931 if (!strcmp(str
, "greip") || !strcmp(str
, "gretapip") ||
1932 !strcmp(str
, "greip6") || !strcmp(str
, "gretapip6"))
1933 return system_link_del(name
);
1935 return tunnel_ioctl(name
, SIOCDELTUNNEL
, NULL
);
1938 int system_del_ip_tunnel(const char *name
, struct blob_attr
*attr
)
1940 struct blob_attr
*tb
[__TUNNEL_ATTR_MAX
];
1942 blobmsg_parse(tunnel_attr_list
.params
, __TUNNEL_ATTR_MAX
, tb
,
1943 blob_data(attr
), blob_len(attr
));
1945 return __system_del_ip_tunnel(name
, tb
);
1948 int system_update_ipv6_mtu(struct device
*dev
, int mtu
)
1952 snprintf(buf
, sizeof(buf
), "/proc/sys/net/ipv6/conf/%s/mtu",
1955 int fd
= open(buf
, O_RDWR
);
1956 ssize_t len
= read(fd
, buf
, sizeof(buf
) - 1);
1963 if (!mtu
|| ret
<= mtu
)
1966 lseek(fd
, 0, SEEK_SET
);
1967 if (write(fd
, buf
, snprintf(buf
, sizeof(buf
), "%i", mtu
)) <= 0)
1975 int system_add_ip_tunnel(const char *name
, struct blob_attr
*attr
)
1977 struct blob_attr
*tb
[__TUNNEL_ATTR_MAX
];
1978 struct blob_attr
*cur
;
1981 blobmsg_parse(tunnel_attr_list
.params
, __TUNNEL_ATTR_MAX
, tb
,
1982 blob_data(attr
), blob_len(attr
));
1984 __system_del_ip_tunnel(name
, tb
);
1986 if (!(cur
= tb
[TUNNEL_ATTR_TYPE
]))
1988 str
= blobmsg_data(cur
);
1990 unsigned int ttl
= 0;
1991 if ((cur
= tb
[TUNNEL_ATTR_TTL
])) {
1992 ttl
= blobmsg_get_u32(cur
);
1997 unsigned int link
= 0;
1998 if ((cur
= tb
[TUNNEL_ATTR_LINK
])) {
1999 struct interface
*iface
= vlist_find(&interfaces
, blobmsg_data(cur
), iface
, node
);
2003 if (iface
->l3_dev
.dev
)
2004 link
= iface
->l3_dev
.dev
->ifindex
;
2007 if (!strcmp(str
, "sit")) {
2008 if (system_add_proto_tunnel(name
, IPPROTO_IPV6
, link
, tb
) < 0)
2012 if ((cur
= tb
[TUNNEL_ATTR_6RD_PREFIX
])) {
2014 struct ip_tunnel_6rd p6
;
2016 memset(&p6
, 0, sizeof(p6
));
2018 if (!parse_ip_and_netmask(AF_INET6
, blobmsg_data(cur
),
2019 &p6
.prefix
, &mask
) || mask
> 128)
2021 p6
.prefixlen
= mask
;
2023 if ((cur
= tb
[TUNNEL_ATTR_6RD_RELAY_PREFIX
])) {
2024 if (!parse_ip_and_netmask(AF_INET
, blobmsg_data(cur
),
2025 &p6
.relay_prefix
, &mask
) || mask
> 32)
2027 p6
.relay_prefixlen
= mask
;
2030 if (tunnel_ioctl(name
, SIOCADD6RD
, &p6
) < 0) {
2031 __system_del_ip_tunnel(name
, tb
);
2036 #ifdef IFLA_IPTUN_MAX
2037 } else if (!strcmp(str
, "ipip6")) {
2038 struct nl_msg
*nlm
= nlmsg_alloc_simple(RTM_NEWLINK
,
2039 NLM_F_REQUEST
| NLM_F_REPLACE
| NLM_F_CREATE
);
2040 struct ifinfomsg ifi
= { .ifi_family
= AF_UNSPEC
};
2046 nlmsg_append(nlm
, &ifi
, sizeof(ifi
), 0);
2047 nla_put_string(nlm
, IFLA_IFNAME
, name
);
2050 nla_put_u32(nlm
, IFLA_LINK
, link
);
2052 struct nlattr
*linkinfo
= nla_nest_start(nlm
, IFLA_LINKINFO
);
2057 nla_put_string(nlm
, IFLA_INFO_KIND
, "ip6tnl");
2058 struct nlattr
*infodata
= nla_nest_start(nlm
, IFLA_INFO_DATA
);
2065 nla_put_u32(nlm
, IFLA_IPTUN_LINK
, link
);
2067 nla_put_u8(nlm
, IFLA_IPTUN_PROTO
, IPPROTO_IPIP
);
2068 nla_put_u8(nlm
, IFLA_IPTUN_TTL
, (ttl
) ? ttl
: 64);
2069 nla_put_u8(nlm
, IFLA_IPTUN_ENCAP_LIMIT
, 4);
2071 struct in6_addr in6buf
;
2072 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
])) {
2073 if (inet_pton(AF_INET6
, blobmsg_data(cur
), &in6buf
) < 1) {
2077 nla_put(nlm
, IFLA_IPTUN_LOCAL
, sizeof(in6buf
), &in6buf
);
2080 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
])) {
2081 if (inet_pton(AF_INET6
, blobmsg_data(cur
), &in6buf
) < 1) {
2085 nla_put(nlm
, IFLA_IPTUN_REMOTE
, sizeof(in6buf
), &in6buf
);
2088 #ifdef IFLA_IPTUN_FMR_MAX
2089 if ((cur
= tb
[TUNNEL_ATTR_FMRS
])) {
2090 struct nlattr
*fmrs
= nla_nest_start(nlm
, IFLA_IPTUN_FMRS
);
2092 struct blob_attr
*fmr
;
2093 unsigned rem
, fmrcnt
= 0;
2094 blobmsg_for_each_attr(fmr
, cur
, rem
) {
2095 if (blobmsg_type(fmr
) != BLOBMSG_TYPE_STRING
)
2098 unsigned ip4len
, ip6len
, ealen
, offset
= 6;
2102 if (sscanf(blobmsg_get_string(fmr
), "%47[^/]/%u,%15[^/]/%u,%u,%u",
2103 ip6buf
, &ip6len
, ip4buf
, &ip4len
, &ealen
, &offset
) < 5) {
2108 struct in6_addr ip6prefix
;
2109 struct in_addr ip4prefix
;
2110 if (inet_pton(AF_INET6
, ip6buf
, &ip6prefix
) != 1 ||
2111 inet_pton(AF_INET
, ip4buf
, &ip4prefix
) != 1) {
2116 struct nlattr
*rule
= nla_nest_start(nlm
, ++fmrcnt
);
2118 nla_put(nlm
, IFLA_IPTUN_FMR_IP6_PREFIX
, sizeof(ip6prefix
), &ip6prefix
);
2119 nla_put(nlm
, IFLA_IPTUN_FMR_IP4_PREFIX
, sizeof(ip4prefix
), &ip4prefix
);
2120 nla_put_u8(nlm
, IFLA_IPTUN_FMR_IP6_PREFIX_LEN
, ip6len
);
2121 nla_put_u8(nlm
, IFLA_IPTUN_FMR_IP4_PREFIX_LEN
, ip4len
);
2122 nla_put_u8(nlm
, IFLA_IPTUN_FMR_EA_LEN
, ealen
);
2123 nla_put_u8(nlm
, IFLA_IPTUN_FMR_OFFSET
, offset
);
2125 nla_nest_end(nlm
, rule
);
2128 nla_nest_end(nlm
, fmrs
);
2132 nla_nest_end(nlm
, infodata
);
2133 nla_nest_end(nlm
, linkinfo
);
2135 return system_rtnl_call(nlm
);
2139 } else if (!strcmp(str
, "greip")) {
2140 return system_add_gre_tunnel(name
, "gre", link
, tb
, false);
2141 } else if (!strcmp(str
, "gretapip")) {
2142 return system_add_gre_tunnel(name
, "gretap", link
, tb
, false);
2143 } else if (!strcmp(str
, "greip6")) {
2144 return system_add_gre_tunnel(name
, "ip6gre", link
, tb
, true);
2145 } else if (!strcmp(str
, "gretapip6")) {
2146 return system_add_gre_tunnel(name
, "ip6gretap", link
, tb
, true);
2148 } else if (!strcmp(str
, "ipip")) {
2149 return system_add_proto_tunnel(name
, IPPROTO_IPIP
, link
, tb
);