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 void system_set_rpfilter(struct device
*dev
, const char *val
)
270 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev
->ifname
, val
);
273 static void system_set_acceptlocal(struct device
*dev
, const char *val
)
275 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev
->ifname
, val
);
278 static void system_set_igmpversion(struct device
*dev
, const char *val
)
280 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev
->ifname
, val
);
283 static void system_set_mldversion(struct device
*dev
, const char *val
)
285 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev
->ifname
, val
);
288 static int system_get_sysctl(const char *path
, char *buf
, const size_t buf_sz
)
290 int fd
= -1, ret
= -1;
292 fd
= open(path
, O_RDONLY
);
296 ssize_t len
= read(fd
, buf
, buf_sz
- 1);
310 system_get_dev_sysctl(const char *path
, const char *device
, char *buf
, const size_t buf_sz
)
312 snprintf(dev_buf
, sizeof(dev_buf
), path
, device
);
313 return system_get_sysctl(dev_buf
, buf
, buf_sz
);
316 static int system_get_disable_ipv6(struct device
*dev
, char *buf
, const size_t buf_sz
)
318 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
319 dev
->ifname
, buf
, buf_sz
);
322 static int system_get_rpfilter(struct device
*dev
, char *buf
, const size_t buf_sz
)
324 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
325 dev
->ifname
, buf
, buf_sz
);
328 static int system_get_acceptlocal(struct device
*dev
, char *buf
, const size_t buf_sz
)
330 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
331 dev
->ifname
, buf
, buf_sz
);
334 static int system_get_igmpversion(struct device
*dev
, char *buf
, const size_t buf_sz
)
336 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
337 dev
->ifname
, buf
, buf_sz
);
340 static int system_get_mldversion(struct device
*dev
, char *buf
, const size_t buf_sz
)
342 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
343 dev
->ifname
, buf
, buf_sz
);
346 // Evaluate netlink messages
347 static int cb_rtnl_event(struct nl_msg
*msg
, void *arg
)
349 struct nlmsghdr
*nh
= nlmsg_hdr(msg
);
350 struct ifinfomsg
*ifi
= NLMSG_DATA(nh
);
351 struct nlattr
*nla
[__IFLA_MAX
];
355 if (nh
->nlmsg_type
!= RTM_NEWLINK
)
358 nlmsg_parse(nh
, sizeof(*ifi
), nla
, __IFLA_MAX
- 1, NULL
);
359 if (!nla
[IFLA_IFNAME
])
362 struct device
*dev
= device_get(nla_data(nla
[IFLA_IFNAME
]), false);
363 if (!dev
|| dev
->type
->keep_link_status
)
366 if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev
->ifname
, buf
, sizeof(buf
)))
367 link_state
= strtoul(buf
, NULL
, 0);
369 device_set_link(dev
, link_state
? true : false);
376 handle_hotplug_msg(char *data
, int size
)
378 const char *subsystem
= NULL
, *interface
= NULL
;
379 char *cur
, *end
, *sep
;
384 if (!strncmp(data
, "add@", 4))
386 else if (!strncmp(data
, "remove@", 7))
391 skip
= strlen(data
) + 1;
394 for (cur
= data
+ skip
; cur
< end
; cur
+= skip
) {
395 skip
= strlen(cur
) + 1;
397 sep
= strchr(cur
, '=');
402 if (!strcmp(cur
, "INTERFACE"))
404 else if (!strcmp(cur
, "SUBSYSTEM")) {
406 if (strcmp(subsystem
, "net") != 0)
409 if (subsystem
&& interface
)
415 dev
= device_get(interface
, false);
419 if (dev
->type
!= &simple_device_type
)
422 if (add
&& system_if_force_external(dev
->ifname
))
425 device_set_present(dev
, add
);
429 handle_hotplug_event(struct uloop_fd
*u
, unsigned int events
)
431 struct event_socket
*ev
= container_of(u
, struct event_socket
, uloop
);
432 struct sockaddr_nl nla
;
433 unsigned char *buf
= NULL
;
436 while ((size
= nl_recv(ev
->sock
, &nla
, &buf
, NULL
)) > 0) {
438 handle_hotplug_msg((char *) buf
, size
);
444 static int system_rtnl_call(struct nl_msg
*msg
)
448 ret
= nl_send_auto_complete(sock_rtnl
, msg
);
454 return nl_wait_for_ack(sock_rtnl
);
457 int system_bridge_delbr(struct device
*bridge
)
459 return ioctl(sock_ioctl
, SIOCBRDELBR
, bridge
->ifname
);
462 static int system_bridge_if(const char *bridge
, struct device
*dev
, int cmd
, void *data
)
466 memset(&ifr
, 0, sizeof(ifr
));
468 ifr
.ifr_ifindex
= dev
->ifindex
;
471 strncpy(ifr
.ifr_name
, bridge
, sizeof(ifr
.ifr_name
));
472 return ioctl(sock_ioctl
, cmd
, &ifr
);
475 static bool system_is_bridge(const char *name
, char *buf
, int buflen
)
479 snprintf(buf
, buflen
, "/sys/devices/virtual/net/%s/bridge", name
);
480 if (stat(buf
, &st
) < 0)
486 static char *system_get_bridge(const char *name
, char *buf
, int buflen
)
492 snprintf(buf
, buflen
, "/sys/devices/virtual/net/*/brif/%s/bridge", name
);
493 if (glob(buf
, GLOB_NOSORT
, NULL
, &gl
) < 0)
497 len
= readlink(gl
.gl_pathv
[0], buf
, buflen
);
505 path
= strrchr(buf
, '/');
512 static void system_bridge_set_wireless(const char *bridge
, const char *dev
)
514 snprintf(dev_buf
, sizeof(dev_buf
),
515 "/sys/devices/virtual/net/%s/brif/%s/multicast_to_unicast",
517 system_set_sysctl(dev_buf
, "1");
520 int system_bridge_addif(struct device
*bridge
, struct device
*dev
)
525 oldbr
= system_get_bridge(dev
->ifname
, dev_buf
, sizeof(dev_buf
));
526 if (!oldbr
|| strcmp(oldbr
, bridge
->ifname
) != 0)
527 ret
= system_bridge_if(bridge
->ifname
, dev
, SIOCBRADDIF
, NULL
);
530 system_bridge_set_wireless(bridge
->ifname
, dev
->ifname
);
535 int system_bridge_delif(struct device
*bridge
, struct device
*dev
)
537 return system_bridge_if(bridge
->ifname
, dev
, SIOCBRDELIF
, NULL
);
540 int system_if_resolve(struct device
*dev
)
543 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
544 if (!ioctl(sock_ioctl
, SIOCGIFINDEX
, &ifr
))
545 return ifr
.ifr_ifindex
;
550 static int system_if_flags(const char *ifname
, unsigned add
, unsigned rem
)
554 memset(&ifr
, 0, sizeof(ifr
));
555 strncpy(ifr
.ifr_name
, ifname
, sizeof(ifr
.ifr_name
));
556 ioctl(sock_ioctl
, SIOCGIFFLAGS
, &ifr
);
557 ifr
.ifr_flags
|= add
;
558 ifr
.ifr_flags
&= ~rem
;
559 return ioctl(sock_ioctl
, SIOCSIFFLAGS
, &ifr
);
571 static bool check_ifaddr(struct nlmsghdr
*hdr
, int ifindex
)
573 struct ifaddrmsg
*ifa
= NLMSG_DATA(hdr
);
575 return ifa
->ifa_index
== ifindex
;
578 static bool check_route(struct nlmsghdr
*hdr
, int ifindex
)
580 struct rtmsg
*r
= NLMSG_DATA(hdr
);
581 struct nlattr
*tb
[__RTA_MAX
];
583 if (r
->rtm_protocol
== RTPROT_KERNEL
&&
584 r
->rtm_family
== AF_INET6
)
587 nlmsg_parse(hdr
, sizeof(struct rtmsg
), tb
, __RTA_MAX
- 1, NULL
);
591 return *(int *)RTA_DATA(tb
[RTA_OIF
]) == ifindex
;
594 static bool check_rule(struct nlmsghdr
*hdr
, int ifindex
)
599 static int cb_clear_event(struct nl_msg
*msg
, void *arg
)
601 struct clear_data
*clr
= arg
;
602 struct nlmsghdr
*hdr
= nlmsg_hdr(msg
);
603 bool (*cb
)(struct nlmsghdr
*, int ifindex
);
609 if (hdr
->nlmsg_type
!= RTM_NEWADDR
)
616 if (hdr
->nlmsg_type
!= RTM_NEWROUTE
)
623 if (hdr
->nlmsg_type
!= RTM_NEWRULE
)
632 if (!cb(hdr
, clr
->dev
? clr
->dev
->ifindex
: 0))
635 if (type
== RTM_DELRULE
)
636 D(SYSTEM
, "Remove a rule\n");
638 D(SYSTEM
, "Remove %s from device %s\n",
639 type
== RTM_DELADDR
? "an address" : "a route",
641 memcpy(nlmsg_hdr(clr
->msg
), hdr
, hdr
->nlmsg_len
);
642 hdr
= nlmsg_hdr(clr
->msg
);
643 hdr
->nlmsg_type
= type
;
644 hdr
->nlmsg_flags
= NLM_F_REQUEST
;
646 nl_socket_disable_auto_ack(sock_rtnl
);
647 nl_send_auto_complete(sock_rtnl
, clr
->msg
);
648 nl_socket_enable_auto_ack(sock_rtnl
);
654 cb_finish_event(struct nl_msg
*msg
, void *arg
)
662 error_handler(struct sockaddr_nl
*nla
, struct nlmsgerr
*err
, void *arg
)
665 *pending
= err
->error
;
670 system_if_clear_entries(struct device
*dev
, int type
, int af
)
672 struct clear_data clr
;
673 struct nl_cb
*cb
= nl_cb_alloc(NL_CB_DEFAULT
);
676 .rtm_flags
= RTM_F_CLONED
,
678 int flags
= NLM_F_DUMP
;
687 clr
.size
= sizeof(struct rtgenmsg
);
690 clr
.size
= sizeof(struct rtmsg
);
699 clr
.msg
= nlmsg_alloc_simple(type
, flags
);
703 nlmsg_append(clr
.msg
, &rtm
, clr
.size
, 0);
704 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb_clear_event
, &clr
);
705 nl_cb_set(cb
, NL_CB_FINISH
, NL_CB_CUSTOM
, cb_finish_event
, &pending
);
706 nl_cb_err(cb
, NL_CB_CUSTOM
, error_handler
, &pending
);
708 nl_send_auto_complete(sock_rtnl
, clr
.msg
);
710 nl_recvmsgs(sock_rtnl
, cb
);
718 * Clear bridge (membership) state and bring down device
720 void system_if_clear_state(struct device
*dev
)
722 static char buf
[256];
725 device_set_ifindex(dev
, system_if_resolve(dev
));
726 if (dev
->external
|| !dev
->ifindex
)
729 system_if_flags(dev
->ifname
, 0, IFF_UP
);
731 if (system_is_bridge(dev
->ifname
, buf
, sizeof(buf
))) {
732 D(SYSTEM
, "Delete existing bridge named '%s'\n", dev
->ifname
);
733 system_bridge_delbr(dev
);
737 bridge
= system_get_bridge(dev
->ifname
, buf
, sizeof(buf
));
739 D(SYSTEM
, "Remove device '%s' from bridge '%s'\n", dev
->ifname
, bridge
);
740 system_bridge_if(bridge
, dev
, SIOCBRDELIF
, NULL
);
743 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET
);
744 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET
);
745 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET6
);
746 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET6
);
747 system_set_disable_ipv6(dev
, "0");
750 static inline unsigned long
751 sec_to_jiffies(int val
)
753 return (unsigned long) val
* 100;
756 int system_bridge_addbr(struct device
*bridge
, struct bridge_config
*cfg
)
758 unsigned long args
[4] = {};
760 if (ioctl(sock_ioctl
, SIOCBRADDBR
, bridge
->ifname
) < 0)
763 args
[0] = BRCTL_SET_BRIDGE_STP_STATE
;
764 args
[1] = !!cfg
->stp
;
765 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
767 args
[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY
;
768 args
[1] = sec_to_jiffies(cfg
->forward_delay
);
769 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
771 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
772 bridge
->ifname
, cfg
->igmp_snoop
? "1" : "0");
774 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
775 bridge
->ifname
, cfg
->igmp_snoop
? "1" : "0");
777 args
[0] = BRCTL_SET_BRIDGE_PRIORITY
;
778 args
[1] = cfg
->priority
;
779 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
781 if (cfg
->flags
& BRIDGE_OPT_AGEING_TIME
) {
782 args
[0] = BRCTL_SET_AGEING_TIME
;
783 args
[1] = sec_to_jiffies(cfg
->ageing_time
);
784 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
787 if (cfg
->flags
& BRIDGE_OPT_HELLO_TIME
) {
788 args
[0] = BRCTL_SET_BRIDGE_HELLO_TIME
;
789 args
[1] = sec_to_jiffies(cfg
->hello_time
);
790 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
793 if (cfg
->flags
& BRIDGE_OPT_MAX_AGE
) {
794 args
[0] = BRCTL_SET_BRIDGE_MAX_AGE
;
795 args
[1] = sec_to_jiffies(cfg
->max_age
);
796 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
802 int system_macvlan_add(struct device
*macvlan
, struct device
*dev
, struct macvlan_config
*cfg
)
805 struct nlattr
*linkinfo
, *data
;
806 struct ifinfomsg iim
= { .ifi_family
= AF_UNSPEC
, };
808 static const struct {
810 enum macvlan_mode val
;
812 { "private", MACVLAN_MODE_PRIVATE
},
813 { "vepa", MACVLAN_MODE_VEPA
},
814 { "bridge", MACVLAN_MODE_BRIDGE
},
815 { "passthru", MACVLAN_MODE_PASSTHRU
},
818 msg
= nlmsg_alloc_simple(RTM_NEWLINK
, NLM_F_REQUEST
| NLM_F_CREATE
| NLM_F_EXCL
);
823 nlmsg_append(msg
, &iim
, sizeof(iim
), 0);
825 if (cfg
->flags
& MACVLAN_OPT_MACADDR
)
826 nla_put(msg
, IFLA_ADDRESS
, sizeof(cfg
->macaddr
), cfg
->macaddr
);
827 nla_put_string(msg
, IFLA_IFNAME
, macvlan
->ifname
);
828 nla_put_u32(msg
, IFLA_LINK
, dev
->ifindex
);
830 if (!(linkinfo
= nla_nest_start(msg
, IFLA_LINKINFO
)))
831 goto nla_put_failure
;
833 nla_put_string(msg
, IFLA_INFO_KIND
, "macvlan");
835 if (!(data
= nla_nest_start(msg
, IFLA_INFO_DATA
)))
836 goto nla_put_failure
;
839 for (i
= 0; i
< ARRAY_SIZE(modes
); i
++) {
840 if (strcmp(cfg
->mode
, modes
[i
].name
) != 0)
843 nla_put_u32(msg
, IFLA_MACVLAN_MODE
, modes
[i
].val
);
848 nla_nest_end(msg
, data
);
849 nla_nest_end(msg
, linkinfo
);
851 rv
= system_rtnl_call(msg
);
853 D(SYSTEM
, "Error adding macvlan '%s' over '%s': %d\n", macvlan
->ifname
, dev
->ifname
, rv
);
862 static int system_link_del(const char *ifname
)
865 struct ifinfomsg iim
= {
866 .ifi_family
= AF_UNSPEC
,
870 msg
= nlmsg_alloc_simple(RTM_DELLINK
, NLM_F_REQUEST
);
875 nlmsg_append(msg
, &iim
, sizeof(iim
), 0);
876 nla_put_string(msg
, IFLA_IFNAME
, ifname
);
877 return system_rtnl_call(msg
);
880 int system_macvlan_del(struct device
*macvlan
)
882 return system_link_del(macvlan
->ifname
);
885 static int system_vlan(struct device
*dev
, int id
)
887 struct vlan_ioctl_args ifr
= {
888 .cmd
= SET_VLAN_NAME_TYPE_CMD
,
889 .u
.name_type
= VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD
,
892 ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
895 ifr
.cmd
= DEL_VLAN_CMD
;
898 ifr
.cmd
= ADD_VLAN_CMD
;
901 strncpy(ifr
.device1
, dev
->ifname
, sizeof(ifr
.device1
));
902 return ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
905 int system_vlan_add(struct device
*dev
, int id
)
907 return system_vlan(dev
, id
);
910 int system_vlan_del(struct device
*dev
)
912 return system_vlan(dev
, -1);
915 int system_vlandev_add(struct device
*vlandev
, struct device
*dev
, struct vlandev_config
*cfg
)
918 struct nlattr
*linkinfo
, *data
;
919 struct ifinfomsg iim
= { .ifi_family
= AF_UNSPEC
};
922 msg
= nlmsg_alloc_simple(RTM_NEWLINK
, NLM_F_REQUEST
| NLM_F_CREATE
| NLM_F_EXCL
);
927 nlmsg_append(msg
, &iim
, sizeof(iim
), 0);
928 nla_put_string(msg
, IFLA_IFNAME
, vlandev
->ifname
);
929 nla_put_u32(msg
, IFLA_LINK
, dev
->ifindex
);
931 if (!(linkinfo
= nla_nest_start(msg
, IFLA_LINKINFO
)))
932 goto nla_put_failure
;
934 nla_put_string(msg
, IFLA_INFO_KIND
, "vlan");
936 if (!(data
= nla_nest_start(msg
, IFLA_INFO_DATA
)))
937 goto nla_put_failure
;
939 nla_put_u16(msg
, IFLA_VLAN_ID
, cfg
->vid
);
941 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
942 nla_put_u16(msg
, IFLA_VLAN_PROTOCOL
, htons(cfg
->proto
));
944 if(cfg
->proto
== VLAN_PROTO_8021AD
)
945 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
);
948 nla_nest_end(msg
, data
);
949 nla_nest_end(msg
, linkinfo
);
951 rv
= system_rtnl_call(msg
);
953 D(SYSTEM
, "Error adding vlandev '%s' over '%s': %d\n", vlandev
->ifname
, dev
->ifname
, rv
);
962 int system_vlandev_del(struct device
*vlandev
)
964 return system_link_del(vlandev
->ifname
);
968 system_if_get_settings(struct device
*dev
, struct device_settings
*s
)
973 memset(&ifr
, 0, sizeof(ifr
));
974 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
976 if (ioctl(sock_ioctl
, SIOCGIFMTU
, &ifr
) == 0) {
977 s
->mtu
= ifr
.ifr_mtu
;
978 s
->flags
|= DEV_OPT_MTU
;
981 if (ioctl(sock_ioctl
, SIOCGIFTXQLEN
, &ifr
) == 0) {
982 s
->txqueuelen
= ifr
.ifr_qlen
;
983 s
->flags
|= DEV_OPT_TXQUEUELEN
;
986 if (ioctl(sock_ioctl
, SIOCGIFHWADDR
, &ifr
) == 0) {
987 memcpy(s
->macaddr
, &ifr
.ifr_hwaddr
.sa_data
, sizeof(s
->macaddr
));
988 s
->flags
|= DEV_OPT_MACADDR
;
991 if (!system_get_disable_ipv6(dev
, buf
, sizeof(buf
))) {
992 s
->ipv6
= !strtoul(buf
, NULL
, 0);
993 s
->flags
|= DEV_OPT_IPV6
;
996 if (ioctl(sock_ioctl
, SIOCGIFFLAGS
, &ifr
) == 0) {
997 s
->promisc
= ifr
.ifr_flags
& IFF_PROMISC
;
998 s
->flags
|= DEV_OPT_PROMISC
;
1001 if (!system_get_rpfilter(dev
, buf
, sizeof(buf
))) {
1002 s
->rpfilter
= strtoul(buf
, NULL
, 0);
1003 s
->flags
|= DEV_OPT_RPFILTER
;
1006 if (!system_get_acceptlocal(dev
, buf
, sizeof(buf
))) {
1007 s
->acceptlocal
= strtoul(buf
, NULL
, 0);
1008 s
->flags
|= DEV_OPT_ACCEPTLOCAL
;
1011 if (!system_get_igmpversion(dev
, buf
, sizeof(buf
))) {
1012 s
->igmpversion
= strtoul(buf
, NULL
, 0);
1013 s
->flags
|= DEV_OPT_IGMPVERSION
;
1016 if (!system_get_mldversion(dev
, buf
, sizeof(buf
))) {
1017 s
->mldversion
= strtoul(buf
, NULL
, 0);
1018 s
->flags
|= DEV_OPT_MLDVERSION
;
1023 system_if_apply_settings(struct device
*dev
, struct device_settings
*s
, unsigned int apply_mask
)
1030 memset(&ifr
, 0, sizeof(ifr
));
1031 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
1032 if (s
->flags
& DEV_OPT_MTU
& apply_mask
) {
1033 ifr
.ifr_mtu
= s
->mtu
;
1034 if (ioctl(sock_ioctl
, SIOCSIFMTU
, &ifr
) < 0)
1035 s
->flags
&= ~DEV_OPT_MTU
;
1037 if (s
->flags
& DEV_OPT_TXQUEUELEN
& apply_mask
) {
1038 ifr
.ifr_qlen
= s
->txqueuelen
;
1039 if (ioctl(sock_ioctl
, SIOCSIFTXQLEN
, &ifr
) < 0)
1040 s
->flags
&= ~DEV_OPT_TXQUEUELEN
;
1042 if ((s
->flags
& DEV_OPT_MACADDR
& apply_mask
) && !dev
->external
) {
1043 ifr
.ifr_hwaddr
.sa_family
= ARPHRD_ETHER
;
1044 memcpy(&ifr
.ifr_hwaddr
.sa_data
, s
->macaddr
, sizeof(s
->macaddr
));
1045 if (ioctl(sock_ioctl
, SIOCSIFHWADDR
, &ifr
) < 0)
1046 s
->flags
&= ~DEV_OPT_MACADDR
;
1048 if (s
->flags
& DEV_OPT_IPV6
& apply_mask
)
1049 system_set_disable_ipv6(dev
, s
->ipv6
? "0" : "1");
1050 if (s
->flags
& DEV_OPT_PROMISC
& apply_mask
) {
1051 if (system_if_flags(dev
->ifname
, s
->promisc
? IFF_PROMISC
: 0,
1052 !s
->promisc
? IFF_PROMISC
: 0) < 0)
1053 s
->flags
&= ~DEV_OPT_PROMISC
;
1055 if (s
->flags
& DEV_OPT_RPFILTER
& apply_mask
) {
1058 snprintf(buf
, sizeof(buf
), "%d", s
->rpfilter
);
1059 system_set_rpfilter(dev
, buf
);
1061 if (s
->flags
& DEV_OPT_ACCEPTLOCAL
& apply_mask
)
1062 system_set_acceptlocal(dev
, s
->acceptlocal
? "1" : "0");
1063 if (s
->flags
& DEV_OPT_IGMPVERSION
& apply_mask
) {
1066 snprintf(buf
, sizeof(buf
), "%d", s
->igmpversion
);
1067 system_set_igmpversion(dev
, buf
);
1069 if (s
->flags
& DEV_OPT_MLDVERSION
& apply_mask
) {
1072 snprintf(buf
, sizeof(buf
), "%d", s
->mldversion
);
1073 system_set_mldversion(dev
, buf
);
1077 int system_if_up(struct device
*dev
)
1079 system_if_get_settings(dev
, &dev
->orig_settings
);
1080 /* Only keep orig settings based on what needs to be set */
1081 dev
->orig_settings
.flags
&= dev
->settings
.flags
;
1082 system_if_apply_settings(dev
, &dev
->settings
, dev
->settings
.flags
);
1083 return system_if_flags(dev
->ifname
, IFF_UP
, 0);
1086 int system_if_down(struct device
*dev
)
1088 int ret
= system_if_flags(dev
->ifname
, 0, IFF_UP
);
1089 system_if_apply_settings(dev
, &dev
->orig_settings
, dev
->orig_settings
.flags
);
1093 struct if_check_data
{
1099 #ifndef IFF_LOWER_UP
1100 #define IFF_LOWER_UP 0x10000
1103 static int cb_if_check_valid(struct nl_msg
*msg
, void *arg
)
1105 struct nlmsghdr
*nh
= nlmsg_hdr(msg
);
1106 struct ifinfomsg
*ifi
= NLMSG_DATA(nh
);
1107 struct if_check_data
*chk
= (struct if_check_data
*)arg
;
1109 if (nh
->nlmsg_type
!= RTM_NEWLINK
)
1112 device_set_present(chk
->dev
, ifi
->ifi_index
> 0 ? true : false);
1113 device_set_link(chk
->dev
, ifi
->ifi_flags
& IFF_LOWER_UP
? true : false);
1118 static int cb_if_check_ack(struct nl_msg
*msg
, void *arg
)
1120 struct if_check_data
*chk
= (struct if_check_data
*)arg
;
1125 static int cb_if_check_error(struct sockaddr_nl
*nla
, struct nlmsgerr
*err
, void *arg
)
1127 struct if_check_data
*chk
= (struct if_check_data
*)arg
;
1129 device_set_present(chk
->dev
, false);
1130 device_set_link(chk
->dev
, false);
1131 chk
->pending
= err
->error
;
1136 int system_if_check(struct device
*dev
)
1138 struct nl_cb
*cb
= nl_cb_alloc(NL_CB_DEFAULT
);
1140 struct ifinfomsg ifi
= {
1141 .ifi_family
= AF_UNSPEC
,
1144 struct if_check_data chk
= {
1150 msg
= nlmsg_alloc_simple(RTM_GETLINK
, 0);
1151 if (!msg
|| nlmsg_append(msg
, &ifi
, sizeof(ifi
), 0) ||
1152 nla_put_string(msg
, IFLA_IFNAME
, dev
->ifname
))
1155 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb_if_check_valid
, &chk
);
1156 nl_cb_set(cb
, NL_CB_ACK
, NL_CB_CUSTOM
, cb_if_check_ack
, &chk
);
1157 nl_cb_err(cb
, NL_CB_CUSTOM
, cb_if_check_error
, &chk
);
1159 nl_send_auto_complete(sock_rtnl
, msg
);
1160 while (chk
.pending
> 0)
1161 nl_recvmsgs(sock_rtnl
, cb
);
1172 system_if_get_parent(struct device
*dev
)
1174 char buf
[64], *devname
;
1175 int ifindex
, iflink
, len
;
1178 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/iflink", dev
->ifname
);
1179 f
= fopen(buf
, "r");
1183 len
= fread(buf
, 1, sizeof(buf
) - 1, f
);
1190 iflink
= strtoul(buf
, NULL
, 0);
1191 ifindex
= system_if_resolve(dev
);
1192 if (!iflink
|| iflink
== ifindex
)
1195 devname
= if_indextoname(iflink
, buf
);
1199 return device_get(devname
, true);
1203 read_string_file(int dir_fd
, const char *file
, char *buf
, int len
)
1209 fd
= openat(dir_fd
, file
, O_RDONLY
);
1214 len
= read(fd
, buf
, len
- 1);
1218 } else if (len
> 0) {
1221 c
= strchr(buf
, '\n');
1234 read_uint64_file(int dir_fd
, const char *file
, uint64_t *val
)
1239 ret
= read_string_file(dir_fd
, file
, buf
, sizeof(buf
));
1241 *val
= strtoull(buf
, NULL
, 0);
1246 /* Assume advertised flags == supported flags */
1247 static const struct {
1250 } ethtool_link_modes
[] = {
1251 { ADVERTISED_10baseT_Half
, "10H" },
1252 { ADVERTISED_10baseT_Full
, "10F" },
1253 { ADVERTISED_100baseT_Half
, "100H" },
1254 { ADVERTISED_100baseT_Full
, "100F" },
1255 { ADVERTISED_1000baseT_Half
, "1000H" },
1256 { ADVERTISED_1000baseT_Full
, "1000F" },
1259 static void system_add_link_modes(struct blob_buf
*b
, __u32 mask
)
1262 for (i
= 0; i
< ARRAY_SIZE(ethtool_link_modes
); i
++) {
1263 if (mask
& ethtool_link_modes
[i
].mask
)
1264 blobmsg_add_string(b
, NULL
, ethtool_link_modes
[i
].name
);
1269 system_if_force_external(const char *ifname
)
1274 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/phy80211", ifname
);
1275 return stat(buf
, &s
) == 0;
1279 system_if_dump_info(struct device
*dev
, struct blob_buf
*b
)
1281 struct ethtool_cmd ecmd
;
1287 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s", dev
->ifname
);
1288 dir_fd
= open(buf
, O_DIRECTORY
);
1290 memset(&ecmd
, 0, sizeof(ecmd
));
1291 memset(&ifr
, 0, sizeof(ifr
));
1292 strcpy(ifr
.ifr_name
, dev
->ifname
);
1293 ifr
.ifr_data
= (caddr_t
) &ecmd
;
1294 ecmd
.cmd
= ETHTOOL_GSET
;
1296 if (ioctl(sock_ioctl
, SIOCETHTOOL
, &ifr
) == 0) {
1297 c
= blobmsg_open_array(b
, "link-advertising");
1298 system_add_link_modes(b
, ecmd
.advertising
);
1299 blobmsg_close_array(b
, c
);
1301 c
= blobmsg_open_array(b
, "link-supported");
1302 system_add_link_modes(b
, ecmd
.supported
);
1303 blobmsg_close_array(b
, c
);
1305 s
= blobmsg_alloc_string_buffer(b
, "speed", 8);
1306 snprintf(s
, 8, "%d%c", ethtool_cmd_speed(&ecmd
),
1307 ecmd
.duplex
== DUPLEX_HALF
? 'H' : 'F');
1308 blobmsg_add_string_buffer(b
);
1316 system_if_dump_stats(struct device
*dev
, struct blob_buf
*b
)
1318 const char *const counters
[] = {
1319 "collisions", "rx_frame_errors", "tx_compressed",
1320 "multicast", "rx_length_errors", "tx_dropped",
1321 "rx_bytes", "rx_missed_errors", "tx_errors",
1322 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1323 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1324 "rx_dropped", "tx_aborted_errors", "tx_packets",
1325 "rx_errors", "tx_bytes", "tx_window_errors",
1326 "rx_fifo_errors", "tx_carrier_errors",
1333 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/statistics", dev
->ifname
);
1334 stats_dir
= open(buf
, O_DIRECTORY
);
1338 for (i
= 0; i
< ARRAY_SIZE(counters
); i
++)
1339 if (read_uint64_file(stats_dir
, counters
[i
], &val
))
1340 blobmsg_add_u64(b
, counters
[i
], val
);
1346 static int system_addr(struct device
*dev
, struct device_addr
*addr
, int cmd
)
1348 bool v4
= ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
);
1349 int alen
= v4
? 4 : 16;
1350 unsigned int flags
= 0;
1351 struct ifaddrmsg ifa
= {
1352 .ifa_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1353 .ifa_prefixlen
= addr
->mask
,
1354 .ifa_index
= dev
->ifindex
,
1358 if (cmd
== RTM_NEWADDR
)
1359 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
1361 msg
= nlmsg_alloc_simple(cmd
, flags
);
1365 nlmsg_append(msg
, &ifa
, sizeof(ifa
), 0);
1366 nla_put(msg
, IFA_LOCAL
, alen
, &addr
->addr
);
1368 if (addr
->broadcast
)
1369 nla_put_u32(msg
, IFA_BROADCAST
, addr
->broadcast
);
1370 if (addr
->point_to_point
)
1371 nla_put_u32(msg
, IFA_ADDRESS
, addr
->point_to_point
);
1373 time_t now
= system_get_rtime();
1374 struct ifa_cacheinfo cinfo
= {0xffffffffU
, 0xffffffffU
, 0, 0};
1376 if (addr
->preferred_until
) {
1377 int64_t preferred
= addr
->preferred_until
- now
;
1380 else if (preferred
> UINT32_MAX
)
1381 preferred
= UINT32_MAX
;
1383 cinfo
.ifa_prefered
= preferred
;
1386 if (addr
->valid_until
) {
1387 int64_t valid
= addr
->valid_until
- now
;
1390 else if (valid
> UINT32_MAX
)
1393 cinfo
.ifa_valid
= valid
;
1396 nla_put(msg
, IFA_CACHEINFO
, sizeof(cinfo
), &cinfo
);
1399 return system_rtnl_call(msg
);
1402 int system_add_address(struct device
*dev
, struct device_addr
*addr
)
1404 return system_addr(dev
, addr
, RTM_NEWADDR
);
1407 int system_del_address(struct device
*dev
, struct device_addr
*addr
)
1409 return system_addr(dev
, addr
, RTM_DELADDR
);
1412 static int system_rt(struct device
*dev
, struct device_route
*route
, int cmd
)
1414 int alen
= ((route
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
) ? 4 : 16;
1416 unsigned int flags
= 0;
1419 have_gw
= !!route
->nexthop
.in
.s_addr
;
1421 have_gw
= route
->nexthop
.in6
.s6_addr32
[0] ||
1422 route
->nexthop
.in6
.s6_addr32
[1] ||
1423 route
->nexthop
.in6
.s6_addr32
[2] ||
1424 route
->nexthop
.in6
.s6_addr32
[3];
1426 unsigned int table
= (route
->flags
& (DEVROUTE_TABLE
| DEVROUTE_SRCTABLE
))
1427 ? route
->table
: RT_TABLE_MAIN
;
1429 struct rtmsg rtm
= {
1430 .rtm_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1431 .rtm_dst_len
= route
->mask
,
1432 .rtm_src_len
= route
->sourcemask
,
1433 .rtm_table
= (table
< 256) ? table
: RT_TABLE_UNSPEC
,
1434 .rtm_protocol
= (route
->flags
& DEVADDR_KERNEL
) ? RTPROT_KERNEL
: RTPROT_STATIC
,
1435 .rtm_scope
= RT_SCOPE_NOWHERE
,
1436 .rtm_type
= (cmd
== RTM_DELROUTE
) ? 0: RTN_UNICAST
,
1437 .rtm_flags
= (route
->flags
& DEVROUTE_ONLINK
) ? RTNH_F_ONLINK
: 0,
1441 if (cmd
== RTM_NEWROUTE
) {
1442 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
1444 if (!dev
) { // Add null-route
1445 rtm
.rtm_scope
= RT_SCOPE_UNIVERSE
;
1446 rtm
.rtm_type
= RTN_UNREACHABLE
;
1449 rtm
.rtm_scope
= (have_gw
) ? RT_SCOPE_UNIVERSE
: RT_SCOPE_LINK
;
1452 if (route
->flags
& DEVROUTE_TYPE
) {
1453 rtm
.rtm_type
= route
->type
;
1454 if (!(route
->flags
& (DEVROUTE_TABLE
| DEVROUTE_SRCTABLE
))) {
1455 if (rtm
.rtm_type
== RTN_LOCAL
|| rtm
.rtm_type
== RTN_BROADCAST
||
1456 rtm
.rtm_type
== RTN_NAT
|| rtm
.rtm_type
== RTN_ANYCAST
)
1457 rtm
.rtm_table
= RT_TABLE_LOCAL
;
1460 if (rtm
.rtm_type
== RTN_LOCAL
|| rtm
.rtm_type
== RTN_NAT
) {
1461 rtm
.rtm_scope
= RT_SCOPE_HOST
;
1462 } else if (rtm
.rtm_type
== RTN_BROADCAST
|| rtm
.rtm_type
== RTN_MULTICAST
||
1463 rtm
.rtm_type
== RTN_ANYCAST
) {
1464 rtm
.rtm_scope
= RT_SCOPE_LINK
;
1465 } else if (rtm
.rtm_type
== RTN_BLACKHOLE
|| rtm
.rtm_type
== RTN_UNREACHABLE
||
1466 rtm
.rtm_type
== RTN_PROHIBIT
|| rtm
.rtm_type
== RTN_FAILED_POLICY
) {
1467 rtm
.rtm_scope
= RT_SCOPE_UNIVERSE
;
1472 msg
= nlmsg_alloc_simple(cmd
, flags
);
1476 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
1479 nla_put(msg
, RTA_DST
, alen
, &route
->addr
);
1481 if (route
->sourcemask
) {
1482 if (rtm
.rtm_family
== AF_INET
)
1483 nla_put(msg
, RTA_PREFSRC
, alen
, &route
->source
);
1485 nla_put(msg
, RTA_SRC
, alen
, &route
->source
);
1488 if (route
->metric
> 0)
1489 nla_put_u32(msg
, RTA_PRIORITY
, route
->metric
);
1492 nla_put(msg
, RTA_GATEWAY
, alen
, &route
->nexthop
);
1495 nla_put_u32(msg
, RTA_OIF
, dev
->ifindex
);
1498 nla_put_u32(msg
, RTA_TABLE
, table
);
1500 if (route
->flags
& DEVROUTE_MTU
) {
1501 struct nlattr
*metrics
;
1503 if (!(metrics
= nla_nest_start(msg
, RTA_METRICS
)))
1504 goto nla_put_failure
;
1506 nla_put_u32(msg
, RTAX_MTU
, route
->mtu
);
1508 nla_nest_end(msg
, metrics
);
1511 return system_rtnl_call(msg
);
1518 int system_add_route(struct device
*dev
, struct device_route
*route
)
1520 return system_rt(dev
, route
, RTM_NEWROUTE
);
1523 int system_del_route(struct device
*dev
, struct device_route
*route
)
1525 return system_rt(dev
, route
, RTM_DELROUTE
);
1528 int system_flush_routes(void)
1530 const char *names
[] = {
1531 "/proc/sys/net/ipv4/route/flush",
1532 "/proc/sys/net/ipv6/route/flush"
1536 for (i
= 0; i
< ARRAY_SIZE(names
); i
++) {
1537 fd
= open(names
[i
], O_WRONLY
);
1541 if (write(fd
, "-1", 2)) {}
1547 bool system_resolve_rt_type(const char *type
, unsigned int *id
)
1549 return system_rtn_aton(type
, id
);
1552 bool system_resolve_rt_table(const char *name
, unsigned int *id
)
1556 unsigned int n
, table
= RT_TABLE_UNSPEC
;
1558 /* first try to parse table as number */
1559 if ((n
= strtoul(name
, &e
, 0)) > 0 && !*e
)
1562 /* handle well known aliases */
1563 else if (!strcmp(name
, "default"))
1564 table
= RT_TABLE_DEFAULT
;
1565 else if (!strcmp(name
, "main"))
1566 table
= RT_TABLE_MAIN
;
1567 else if (!strcmp(name
, "local"))
1568 table
= RT_TABLE_LOCAL
;
1570 /* try to look up name in /etc/iproute2/rt_tables */
1571 else if ((f
= fopen("/etc/iproute2/rt_tables", "r")) != NULL
)
1573 while (fgets(buf
, sizeof(buf
) - 1, f
) != NULL
)
1575 if ((e
= strtok(buf
, " \t\n")) == NULL
|| *e
== '#')
1578 n
= strtoul(e
, NULL
, 10);
1579 e
= strtok(NULL
, " \t\n");
1581 if (e
&& !strcmp(e
, name
))
1591 if (table
== RT_TABLE_UNSPEC
)
1598 bool system_is_default_rt_table(unsigned int id
)
1600 return (id
== RT_TABLE_MAIN
);
1603 bool system_resolve_rpfilter(const char *filter
, unsigned int *id
)
1608 if (!strcmp(filter
, "strict"))
1610 else if (!strcmp(filter
, "loose"))
1613 n
= strtoul(filter
, &e
, 0);
1614 if (*e
|| e
== filter
|| n
> 2)
1622 static int system_iprule(struct iprule
*rule
, int cmd
)
1624 int alen
= ((rule
->flags
& IPRULE_FAMILY
) == IPRULE_INET4
) ? 4 : 16;
1627 struct rtmsg rtm
= {
1628 .rtm_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1629 .rtm_protocol
= RTPROT_STATIC
,
1630 .rtm_scope
= RT_SCOPE_UNIVERSE
,
1631 .rtm_table
= RT_TABLE_UNSPEC
,
1632 .rtm_type
= RTN_UNSPEC
,
1636 if (cmd
== RTM_NEWRULE
) {
1637 rtm
.rtm_type
= RTN_UNICAST
;
1638 rtm
.rtm_flags
|= NLM_F_REPLACE
| NLM_F_EXCL
;
1642 rtm
.rtm_flags
|= FIB_RULE_INVERT
;
1644 if (rule
->flags
& IPRULE_SRC
)
1645 rtm
.rtm_src_len
= rule
->src_mask
;
1647 if (rule
->flags
& IPRULE_DEST
)
1648 rtm
.rtm_dst_len
= rule
->dest_mask
;
1650 if (rule
->flags
& IPRULE_TOS
)
1651 rtm
.rtm_tos
= rule
->tos
;
1653 if (rule
->flags
& IPRULE_LOOKUP
) {
1654 if (rule
->lookup
< 256)
1655 rtm
.rtm_table
= rule
->lookup
;
1658 if (rule
->flags
& IPRULE_ACTION
)
1659 rtm
.rtm_type
= rule
->action
;
1660 else if (rule
->flags
& IPRULE_GOTO
)
1661 rtm
.rtm_type
= FR_ACT_GOTO
;
1662 else if (!(rule
->flags
& (IPRULE_LOOKUP
| IPRULE_ACTION
| IPRULE_GOTO
)))
1663 rtm
.rtm_type
= FR_ACT_NOP
;
1665 msg
= nlmsg_alloc_simple(cmd
, NLM_F_REQUEST
);
1670 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
1672 if (rule
->flags
& IPRULE_IN
)
1673 nla_put(msg
, FRA_IFNAME
, strlen(rule
->in_dev
) + 1, rule
->in_dev
);
1675 if (rule
->flags
& IPRULE_OUT
)
1676 nla_put(msg
, FRA_OIFNAME
, strlen(rule
->out_dev
) + 1, rule
->out_dev
);
1678 if (rule
->flags
& IPRULE_SRC
)
1679 nla_put(msg
, FRA_SRC
, alen
, &rule
->src_addr
);
1681 if (rule
->flags
& IPRULE_DEST
)
1682 nla_put(msg
, FRA_DST
, alen
, &rule
->dest_addr
);
1684 if (rule
->flags
& IPRULE_PRIORITY
)
1685 nla_put_u32(msg
, FRA_PRIORITY
, rule
->priority
);
1686 else if (cmd
== RTM_NEWRULE
)
1687 nla_put_u32(msg
, FRA_PRIORITY
, rule
->order
);
1689 if (rule
->flags
& IPRULE_FWMARK
)
1690 nla_put_u32(msg
, FRA_FWMARK
, rule
->fwmark
);
1692 if (rule
->flags
& IPRULE_FWMASK
)
1693 nla_put_u32(msg
, FRA_FWMASK
, rule
->fwmask
);
1695 if (rule
->flags
& IPRULE_LOOKUP
) {
1696 if (rule
->lookup
>= 256)
1697 nla_put_u32(msg
, FRA_TABLE
, rule
->lookup
);
1700 if (rule
->flags
& IPRULE_GOTO
)
1701 nla_put_u32(msg
, FRA_GOTO
, rule
->gotoid
);
1703 return system_rtnl_call(msg
);
1706 int system_add_iprule(struct iprule
*rule
)
1708 return system_iprule(rule
, RTM_NEWRULE
);
1711 int system_del_iprule(struct iprule
*rule
)
1713 return system_iprule(rule
, RTM_DELRULE
);
1716 int system_flush_iprules(void)
1721 system_if_clear_entries(NULL
, RTM_GETRULE
, AF_INET
);
1722 system_if_clear_entries(NULL
, RTM_GETRULE
, AF_INET6
);
1724 memset(&rule
, 0, sizeof(rule
));
1727 rule
.flags
= IPRULE_INET4
| IPRULE_PRIORITY
| IPRULE_LOOKUP
;
1730 rule
.lookup
= RT_TABLE_LOCAL
;
1731 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1733 rule
.priority
= 32766;
1734 rule
.lookup
= RT_TABLE_MAIN
;
1735 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1737 rule
.priority
= 32767;
1738 rule
.lookup
= RT_TABLE_DEFAULT
;
1739 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1742 rule
.flags
= IPRULE_INET6
| IPRULE_PRIORITY
| IPRULE_LOOKUP
;
1745 rule
.lookup
= RT_TABLE_LOCAL
;
1746 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1748 rule
.priority
= 32766;
1749 rule
.lookup
= RT_TABLE_MAIN
;
1750 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1755 bool system_resolve_iprule_action(const char *action
, unsigned int *id
)
1757 return system_rtn_aton(action
, id
);
1760 time_t system_get_rtime(void)
1765 if (syscall(__NR_clock_gettime
, CLOCK_MONOTONIC
, &ts
) == 0)
1768 if (gettimeofday(&tv
, NULL
) == 0)
1775 #define IP_DF 0x4000
1778 static int tunnel_ioctl(const char *name
, int cmd
, void *p
)
1782 memset(&ifr
, 0, sizeof(ifr
));
1783 strncpy(ifr
.ifr_name
, name
, sizeof(ifr
.ifr_name
));
1784 ifr
.ifr_ifru
.ifru_data
= p
;
1785 return ioctl(sock_ioctl
, cmd
, &ifr
);
1788 #ifdef IFLA_IPTUN_MAX
1789 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
1790 static int system_add_gre_tunnel(const char *name
, const char *kind
,
1791 const unsigned int link
, struct blob_attr
**tb
, bool v6
)
1794 struct ifinfomsg ifi
= { .ifi_family
= AF_UNSPEC
, };
1795 struct blob_attr
*cur
;
1796 uint32_t ikey
= 0, okey
= 0, flags
= 0, flowinfo
= 0;
1797 uint16_t iflags
= 0, oflags
= 0;
1799 int ret
= 0, ttl
= 64;
1801 nlm
= nlmsg_alloc_simple(RTM_NEWLINK
, NLM_F_REQUEST
| NLM_F_REPLACE
| NLM_F_CREATE
);
1805 nlmsg_append(nlm
, &ifi
, sizeof(ifi
), 0);
1806 nla_put_string(nlm
, IFLA_IFNAME
, name
);
1808 struct nlattr
*linkinfo
= nla_nest_start(nlm
, IFLA_LINKINFO
);
1814 nla_put_string(nlm
, IFLA_INFO_KIND
, kind
);
1815 struct nlattr
*infodata
= nla_nest_start(nlm
, IFLA_INFO_DATA
);
1822 nla_put_u32(nlm
, IFLA_GRE_LINK
, link
);
1824 if ((cur
= tb
[TUNNEL_ATTR_TTL
]))
1825 ttl
= blobmsg_get_u32(cur
);
1827 nla_put_u8(nlm
, IFLA_GRE_TTL
, ttl
);
1829 if ((cur
= tb
[TUNNEL_ATTR_TOS
])) {
1830 char *str
= blobmsg_get_string(cur
);
1831 if (strcmp(str
, "inherit")) {
1834 if (!system_tos_aton(str
, &uval
)) {
1840 flowinfo
|= htonl(uval
<< 20) & IP6_FLOWINFO_TCLASS
;
1845 flags
|= IP6_TNL_F_USE_ORIG_TCLASS
;
1851 if ((cur
= tb
[TUNNEL_ATTR_INFO
]) && (blobmsg_type(cur
) == BLOBMSG_TYPE_STRING
)) {
1852 uint8_t icsum
, ocsum
, iseqno
, oseqno
;
1853 if (sscanf(blobmsg_get_string(cur
), "%u,%u,%hhu,%hhu,%hhu,%hhu",
1854 &ikey
, &okey
, &icsum
, &ocsum
, &iseqno
, &oseqno
) < 6) {
1879 struct in6_addr in6buf
;
1880 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
])) {
1881 if (inet_pton(AF_INET6
, blobmsg_data(cur
), &in6buf
) < 1) {
1885 nla_put(nlm
, IFLA_GRE_LOCAL
, sizeof(in6buf
), &in6buf
);
1888 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
])) {
1889 if (inet_pton(AF_INET6
, blobmsg_data(cur
), &in6buf
) < 1) {
1893 nla_put(nlm
, IFLA_GRE_REMOTE
, sizeof(in6buf
), &in6buf
);
1895 nla_put_u8(nlm
, IFLA_GRE_ENCAP_LIMIT
, 4);
1898 nla_put_u32(nlm
, IFLA_GRE_FLOWINFO
, flowinfo
);
1901 nla_put_u32(nlm
, IFLA_GRE_FLAGS
, flags
);
1903 struct in_addr inbuf
;
1906 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
])) {
1907 if (inet_pton(AF_INET
, blobmsg_data(cur
), &inbuf
) < 1) {
1911 nla_put(nlm
, IFLA_GRE_LOCAL
, sizeof(inbuf
), &inbuf
);
1914 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
])) {
1915 if (inet_pton(AF_INET
, blobmsg_data(cur
), &inbuf
) < 1) {
1919 nla_put(nlm
, IFLA_GRE_REMOTE
, sizeof(inbuf
), &inbuf
);
1921 if (IN_MULTICAST(ntohl(inbuf
.s_addr
))) {
1923 okey
= inbuf
.s_addr
;
1928 ikey
= inbuf
.s_addr
;
1934 if ((cur
= tb
[TUNNEL_ATTR_DF
]))
1935 set_df
= blobmsg_get_bool(cur
);
1937 /* ttl !=0 and nopmtudisc are incompatible */
1938 if (ttl
&& !set_df
) {
1943 nla_put_u8(nlm
, IFLA_GRE_PMTUDISC
, set_df
? 1 : 0);
1945 nla_put_u8(nlm
, IFLA_GRE_TOS
, tos
);
1949 nla_put_u16(nlm
, IFLA_GRE_OFLAGS
, oflags
);
1952 nla_put_u16(nlm
, IFLA_GRE_IFLAGS
, iflags
);
1955 nla_put_u32(nlm
, IFLA_GRE_OKEY
, okey
);
1958 nla_put_u32(nlm
, IFLA_GRE_IKEY
, ikey
);
1960 nla_nest_end(nlm
, infodata
);
1961 nla_nest_end(nlm
, linkinfo
);
1963 return system_rtnl_call(nlm
);
1971 static int system_add_proto_tunnel(const char *name
, const uint8_t proto
, const unsigned int link
, struct blob_attr
**tb
)
1973 struct blob_attr
*cur
;
1975 struct ip_tunnel_parm p
= {
1984 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
]) &&
1985 inet_pton(AF_INET
, blobmsg_data(cur
), &p
.iph
.saddr
) < 1)
1988 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
]) &&
1989 inet_pton(AF_INET
, blobmsg_data(cur
), &p
.iph
.daddr
) < 1)
1992 if ((cur
= tb
[TUNNEL_ATTR_DF
]))
1993 set_df
= blobmsg_get_bool(cur
);
1995 if ((cur
= tb
[TUNNEL_ATTR_TTL
]))
1996 p
.iph
.ttl
= blobmsg_get_u32(cur
);
1998 if ((cur
= tb
[TUNNEL_ATTR_TOS
])) {
1999 char *str
= blobmsg_get_string(cur
);
2000 if (strcmp(str
, "inherit")) {
2003 if (!system_tos_aton(str
, &uval
))
2011 p
.iph
.frag_off
= set_df
? htons(IP_DF
) : 0;
2012 /* ttl !=0 and nopmtudisc are incompatible */
2013 if (p
.iph
.ttl
&& p
.iph
.frag_off
== 0)
2016 strncpy(p
.name
, name
, sizeof(p
.name
));
2018 switch (p
.iph
.protocol
) {
2020 return tunnel_ioctl("tunl0", SIOCADDTUNNEL
, &p
);
2022 return tunnel_ioctl("sit0", SIOCADDTUNNEL
, &p
);
2029 static int __system_del_ip_tunnel(const char *name
, struct blob_attr
**tb
)
2031 struct blob_attr
*cur
;
2034 if (!(cur
= tb
[TUNNEL_ATTR_TYPE
]))
2036 str
= blobmsg_data(cur
);
2038 if (!strcmp(str
, "greip") || !strcmp(str
, "gretapip") ||
2039 !strcmp(str
, "greip6") || !strcmp(str
, "gretapip6"))
2040 return system_link_del(name
);
2042 return tunnel_ioctl(name
, SIOCDELTUNNEL
, NULL
);
2045 int system_del_ip_tunnel(const char *name
, struct blob_attr
*attr
)
2047 struct blob_attr
*tb
[__TUNNEL_ATTR_MAX
];
2049 blobmsg_parse(tunnel_attr_list
.params
, __TUNNEL_ATTR_MAX
, tb
,
2050 blob_data(attr
), blob_len(attr
));
2052 return __system_del_ip_tunnel(name
, tb
);
2055 int system_update_ipv6_mtu(struct device
*dev
, int mtu
)
2059 snprintf(buf
, sizeof(buf
), "/proc/sys/net/ipv6/conf/%s/mtu",
2062 int fd
= open(buf
, O_RDWR
);
2063 ssize_t len
= read(fd
, buf
, sizeof(buf
) - 1);
2070 if (!mtu
|| ret
<= mtu
)
2073 lseek(fd
, 0, SEEK_SET
);
2074 if (write(fd
, buf
, snprintf(buf
, sizeof(buf
), "%i", mtu
)) <= 0)
2082 int system_add_ip_tunnel(const char *name
, struct blob_attr
*attr
)
2084 struct blob_attr
*tb
[__TUNNEL_ATTR_MAX
];
2085 struct blob_attr
*cur
;
2088 blobmsg_parse(tunnel_attr_list
.params
, __TUNNEL_ATTR_MAX
, tb
,
2089 blob_data(attr
), blob_len(attr
));
2091 __system_del_ip_tunnel(name
, tb
);
2093 if (!(cur
= tb
[TUNNEL_ATTR_TYPE
]))
2095 str
= blobmsg_data(cur
);
2097 unsigned int ttl
= 0;
2098 if ((cur
= tb
[TUNNEL_ATTR_TTL
])) {
2099 ttl
= blobmsg_get_u32(cur
);
2104 unsigned int link
= 0;
2105 if ((cur
= tb
[TUNNEL_ATTR_LINK
])) {
2106 struct interface
*iface
= vlist_find(&interfaces
, blobmsg_data(cur
), iface
, node
);
2110 if (iface
->l3_dev
.dev
)
2111 link
= iface
->l3_dev
.dev
->ifindex
;
2114 if (!strcmp(str
, "sit")) {
2115 if (system_add_proto_tunnel(name
, IPPROTO_IPV6
, link
, tb
) < 0)
2119 if ((cur
= tb
[TUNNEL_ATTR_6RD_PREFIX
])) {
2121 struct ip_tunnel_6rd p6
;
2123 memset(&p6
, 0, sizeof(p6
));
2125 if (!parse_ip_and_netmask(AF_INET6
, blobmsg_data(cur
),
2126 &p6
.prefix
, &mask
) || mask
> 128)
2128 p6
.prefixlen
= mask
;
2130 if ((cur
= tb
[TUNNEL_ATTR_6RD_RELAY_PREFIX
])) {
2131 if (!parse_ip_and_netmask(AF_INET
, blobmsg_data(cur
),
2132 &p6
.relay_prefix
, &mask
) || mask
> 32)
2134 p6
.relay_prefixlen
= mask
;
2137 if (tunnel_ioctl(name
, SIOCADD6RD
, &p6
) < 0) {
2138 __system_del_ip_tunnel(name
, tb
);
2143 #ifdef IFLA_IPTUN_MAX
2144 } else if (!strcmp(str
, "ipip6")) {
2145 struct nl_msg
*nlm
= nlmsg_alloc_simple(RTM_NEWLINK
,
2146 NLM_F_REQUEST
| NLM_F_REPLACE
| NLM_F_CREATE
);
2147 struct ifinfomsg ifi
= { .ifi_family
= AF_UNSPEC
};
2153 nlmsg_append(nlm
, &ifi
, sizeof(ifi
), 0);
2154 nla_put_string(nlm
, IFLA_IFNAME
, name
);
2157 nla_put_u32(nlm
, IFLA_LINK
, link
);
2159 struct nlattr
*linkinfo
= nla_nest_start(nlm
, IFLA_LINKINFO
);
2164 nla_put_string(nlm
, IFLA_INFO_KIND
, "ip6tnl");
2165 struct nlattr
*infodata
= nla_nest_start(nlm
, IFLA_INFO_DATA
);
2172 nla_put_u32(nlm
, IFLA_IPTUN_LINK
, link
);
2174 nla_put_u8(nlm
, IFLA_IPTUN_PROTO
, IPPROTO_IPIP
);
2175 nla_put_u8(nlm
, IFLA_IPTUN_TTL
, (ttl
) ? ttl
: 64);
2176 nla_put_u8(nlm
, IFLA_IPTUN_ENCAP_LIMIT
, 4);
2178 struct in6_addr in6buf
;
2179 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
])) {
2180 if (inet_pton(AF_INET6
, blobmsg_data(cur
), &in6buf
) < 1) {
2184 nla_put(nlm
, IFLA_IPTUN_LOCAL
, sizeof(in6buf
), &in6buf
);
2187 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
])) {
2188 if (inet_pton(AF_INET6
, blobmsg_data(cur
), &in6buf
) < 1) {
2192 nla_put(nlm
, IFLA_IPTUN_REMOTE
, sizeof(in6buf
), &in6buf
);
2195 #ifdef IFLA_IPTUN_FMR_MAX
2196 if ((cur
= tb
[TUNNEL_ATTR_FMRS
])) {
2197 struct nlattr
*fmrs
= nla_nest_start(nlm
, IFLA_IPTUN_FMRS
);
2199 struct blob_attr
*fmr
;
2200 unsigned rem
, fmrcnt
= 0;
2201 blobmsg_for_each_attr(fmr
, cur
, rem
) {
2202 if (blobmsg_type(fmr
) != BLOBMSG_TYPE_STRING
)
2205 unsigned ip4len
, ip6len
, ealen
, offset
= 6;
2209 if (sscanf(blobmsg_get_string(fmr
), "%47[^/]/%u,%15[^/]/%u,%u,%u",
2210 ip6buf
, &ip6len
, ip4buf
, &ip4len
, &ealen
, &offset
) < 5) {
2215 struct in6_addr ip6prefix
;
2216 struct in_addr ip4prefix
;
2217 if (inet_pton(AF_INET6
, ip6buf
, &ip6prefix
) != 1 ||
2218 inet_pton(AF_INET
, ip4buf
, &ip4prefix
) != 1) {
2223 struct nlattr
*rule
= nla_nest_start(nlm
, ++fmrcnt
);
2225 nla_put(nlm
, IFLA_IPTUN_FMR_IP6_PREFIX
, sizeof(ip6prefix
), &ip6prefix
);
2226 nla_put(nlm
, IFLA_IPTUN_FMR_IP4_PREFIX
, sizeof(ip4prefix
), &ip4prefix
);
2227 nla_put_u8(nlm
, IFLA_IPTUN_FMR_IP6_PREFIX_LEN
, ip6len
);
2228 nla_put_u8(nlm
, IFLA_IPTUN_FMR_IP4_PREFIX_LEN
, ip4len
);
2229 nla_put_u8(nlm
, IFLA_IPTUN_FMR_EA_LEN
, ealen
);
2230 nla_put_u8(nlm
, IFLA_IPTUN_FMR_OFFSET
, offset
);
2232 nla_nest_end(nlm
, rule
);
2235 nla_nest_end(nlm
, fmrs
);
2239 nla_nest_end(nlm
, infodata
);
2240 nla_nest_end(nlm
, linkinfo
);
2242 return system_rtnl_call(nlm
);
2246 } else if (!strcmp(str
, "greip")) {
2247 return system_add_gre_tunnel(name
, "gre", link
, tb
, false);
2248 } else if (!strcmp(str
, "gretapip")) {
2249 return system_add_gre_tunnel(name
, "gretap", link
, tb
, false);
2250 } else if (!strcmp(str
, "greip6")) {
2251 return system_add_gre_tunnel(name
, "ip6gre", link
, tb
, true);
2252 } else if (!strcmp(str
, "gretapip6")) {
2253 return system_add_gre_tunnel(name
, "ip6gretap", link
, tb
, true);
2255 } else if (!strcmp(str
, "ipip")) {
2256 return system_add_proto_tunnel(name
, IPPROTO_IPIP
, link
, tb
);