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
46 #ifndef RT_TABLE_PRELOCAL
47 #define RT_TABLE_PRELOCAL 128
55 #include <netlink/msg.h>
56 #include <netlink/attr.h>
57 #include <netlink/socket.h>
58 #include <libubox/uloop.h>
65 struct uloop_fd uloop
;
70 static int sock_ioctl
= -1;
71 static struct nl_sock
*sock_rtnl
= NULL
;
73 static int cb_rtnl_event(struct nl_msg
*msg
, void *arg
);
74 static void handle_hotplug_event(struct uloop_fd
*u
, unsigned int events
);
76 static char dev_buf
[256];
79 handler_nl_event(struct uloop_fd
*u
, unsigned int events
)
81 struct event_socket
*ev
= container_of(u
, struct event_socket
, uloop
);
83 socklen_t errlen
= sizeof(err
);
86 nl_recvmsgs_default(ev
->sock
);
90 if (getsockopt(u
->fd
, SOL_SOCKET
, SO_ERROR
, (void *)&err
, &errlen
))
95 // Increase rx buffer size on netlink socket
97 if (nl_socket_set_buffer_size(ev
->sock
, ev
->bufsize
, 0))
100 // Request full dump since some info got dropped
101 struct rtgenmsg msg
= { .rtgen_family
= AF_UNSPEC
};
102 nl_send_simple(ev
->sock
, RTM_GETLINK
, NLM_F_DUMP
, &msg
, sizeof(msg
));
112 uloop_fd_delete(&ev
->uloop
);
116 static struct nl_sock
*
117 create_socket(int protocol
, int groups
)
119 struct nl_sock
*sock
;
121 sock
= nl_socket_alloc();
126 nl_join_groups(sock
, groups
);
128 if (nl_connect(sock
, protocol
))
135 create_raw_event_socket(struct event_socket
*ev
, int protocol
, int groups
,
136 uloop_fd_handler cb
, int flags
)
138 ev
->sock
= create_socket(protocol
, groups
);
142 ev
->uloop
.fd
= nl_socket_get_fd(ev
->sock
);
144 if (uloop_fd_add(&ev
->uloop
, ULOOP_READ
|flags
))
151 create_event_socket(struct event_socket
*ev
, int protocol
,
152 int (*cb
)(struct nl_msg
*msg
, void *arg
))
154 if (!create_raw_event_socket(ev
, protocol
, 0, handler_nl_event
, ULOOP_ERROR_CB
))
157 // Install the valid custom callback handler
158 nl_socket_modify_cb(ev
->sock
, NL_CB_VALID
, NL_CB_CUSTOM
, cb
, NULL
);
160 // Disable sequence number checking on event sockets
161 nl_socket_disable_seq_check(ev
->sock
);
163 // Increase rx buffer size to 65K on event sockets
165 if (nl_socket_set_buffer_size(ev
->sock
, ev
->bufsize
, 0))
172 system_rtn_aton(const char *src
, unsigned int *dst
)
177 if (!strcmp(src
, "local"))
179 else if (!strcmp(src
, "nat"))
181 else if (!strcmp(src
, "broadcast"))
183 else if (!strcmp(src
, "anycast"))
185 else if (!strcmp(src
, "multicast"))
187 else if (!strcmp(src
, "prohibit"))
189 else if (!strcmp(src
, "unreachable"))
191 else if (!strcmp(src
, "blackhole"))
193 else if (!strcmp(src
, "xresolve"))
195 else if (!strcmp(src
, "unicast"))
197 else if (!strcmp(src
, "throw"))
199 else if (!strcmp(src
, "failed_policy"))
200 n
= RTN_FAILED_POLICY
;
202 n
= strtoul(src
, &e
, 0);
203 if (!e
|| *e
|| e
== src
|| n
> 255)
212 system_tos_aton(const char *src
, unsigned *dst
)
216 *dst
= strtoul(src
, &e
, 16);
217 if (e
== src
|| *e
|| *dst
> 255)
223 int system_init(void)
225 static struct event_socket rtnl_event
;
226 static struct event_socket hotplug_event
;
228 sock_ioctl
= socket(AF_LOCAL
, SOCK_DGRAM
, 0);
229 system_fd_set_cloexec(sock_ioctl
);
231 // Prepare socket for routing / address control
232 sock_rtnl
= create_socket(NETLINK_ROUTE
, 0);
236 if (!create_event_socket(&rtnl_event
, NETLINK_ROUTE
, cb_rtnl_event
))
239 if (!create_raw_event_socket(&hotplug_event
, NETLINK_KOBJECT_UEVENT
, 1,
240 handle_hotplug_event
, 0))
243 // Receive network link events form kernel
244 nl_socket_add_membership(rtnl_event
.sock
, RTNLGRP_LINK
);
249 static void system_set_sysctl(const char *path
, const char *val
)
253 fd
= open(path
, O_WRONLY
);
257 if (write(fd
, val
, strlen(val
))) {}
261 static void system_set_dev_sysctl(const char *path
, const char *device
, const char *val
)
263 snprintf(dev_buf
, sizeof(dev_buf
), path
, device
);
264 system_set_sysctl(dev_buf
, val
);
267 static void system_set_disable_ipv6(struct device
*dev
, const char *val
)
269 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev
->ifname
, val
);
272 static void system_set_rpfilter(struct device
*dev
, const char *val
)
274 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev
->ifname
, val
);
277 static void system_set_acceptlocal(struct device
*dev
, const char *val
)
279 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev
->ifname
, val
);
282 static void system_set_igmpversion(struct device
*dev
, const char *val
)
284 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev
->ifname
, val
);
287 static void system_set_mldversion(struct device
*dev
, const char *val
)
289 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev
->ifname
, val
);
292 static void system_set_neigh4reachabletime(struct device
*dev
, const char *val
)
294 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev
->ifname
, val
);
297 static void system_set_neigh6reachabletime(struct device
*dev
, const char *val
)
299 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev
->ifname
, val
);
302 static int system_get_sysctl(const char *path
, char *buf
, const size_t buf_sz
)
304 int fd
= -1, ret
= -1;
306 fd
= open(path
, O_RDONLY
);
310 ssize_t len
= read(fd
, buf
, buf_sz
- 1);
324 system_get_dev_sysctl(const char *path
, const char *device
, char *buf
, const size_t buf_sz
)
326 snprintf(dev_buf
, sizeof(dev_buf
), path
, device
);
327 return system_get_sysctl(dev_buf
, buf
, buf_sz
);
330 static int system_get_disable_ipv6(struct device
*dev
, char *buf
, const size_t buf_sz
)
332 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
333 dev
->ifname
, buf
, buf_sz
);
336 static int system_get_rpfilter(struct device
*dev
, char *buf
, const size_t buf_sz
)
338 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
339 dev
->ifname
, buf
, buf_sz
);
342 static int system_get_acceptlocal(struct device
*dev
, char *buf
, const size_t buf_sz
)
344 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
345 dev
->ifname
, buf
, buf_sz
);
348 static int system_get_igmpversion(struct device
*dev
, char *buf
, const size_t buf_sz
)
350 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
351 dev
->ifname
, buf
, buf_sz
);
354 static int system_get_mldversion(struct device
*dev
, char *buf
, const size_t buf_sz
)
356 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
357 dev
->ifname
, buf
, buf_sz
);
360 static int system_get_neigh4reachabletime(struct device
*dev
, char *buf
, const size_t buf_sz
)
362 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
363 dev
->ifname
, buf
, buf_sz
);
366 static int system_get_neigh6reachabletime(struct device
*dev
, char *buf
, const size_t buf_sz
)
368 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
369 dev
->ifname
, buf
, buf_sz
);
372 // Evaluate netlink messages
373 static int cb_rtnl_event(struct nl_msg
*msg
, void *arg
)
375 struct nlmsghdr
*nh
= nlmsg_hdr(msg
);
376 struct ifinfomsg
*ifi
= NLMSG_DATA(nh
);
377 struct nlattr
*nla
[__IFLA_MAX
];
381 if (nh
->nlmsg_type
!= RTM_NEWLINK
)
384 nlmsg_parse(nh
, sizeof(*ifi
), nla
, __IFLA_MAX
- 1, NULL
);
385 if (!nla
[IFLA_IFNAME
])
388 struct device
*dev
= device_get(nla_data(nla
[IFLA_IFNAME
]), false);
389 if (!dev
|| dev
->type
->keep_link_status
)
392 if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev
->ifname
, buf
, sizeof(buf
)))
393 link_state
= strtoul(buf
, NULL
, 0);
395 device_set_link(dev
, link_state
? true : false);
402 handle_hotplug_msg(char *data
, int size
)
404 const char *subsystem
= NULL
, *interface
= NULL
;
405 char *cur
, *end
, *sep
;
410 if (!strncmp(data
, "add@", 4))
412 else if (!strncmp(data
, "remove@", 7))
417 skip
= strlen(data
) + 1;
420 for (cur
= data
+ skip
; cur
< end
; cur
+= skip
) {
421 skip
= strlen(cur
) + 1;
423 sep
= strchr(cur
, '=');
428 if (!strcmp(cur
, "INTERFACE"))
430 else if (!strcmp(cur
, "SUBSYSTEM")) {
432 if (strcmp(subsystem
, "net") != 0)
435 if (subsystem
&& interface
)
441 dev
= device_get(interface
, false);
445 if (dev
->type
!= &simple_device_type
)
448 if (add
&& system_if_force_external(dev
->ifname
))
451 device_set_present(dev
, add
);
455 handle_hotplug_event(struct uloop_fd
*u
, unsigned int events
)
457 struct event_socket
*ev
= container_of(u
, struct event_socket
, uloop
);
458 struct sockaddr_nl nla
;
459 unsigned char *buf
= NULL
;
462 while ((size
= nl_recv(ev
->sock
, &nla
, &buf
, NULL
)) > 0) {
464 handle_hotplug_msg((char *) buf
, size
);
470 static int system_rtnl_call(struct nl_msg
*msg
)
474 ret
= nl_send_auto_complete(sock_rtnl
, msg
);
480 return nl_wait_for_ack(sock_rtnl
);
483 int system_bridge_delbr(struct device
*bridge
)
485 return ioctl(sock_ioctl
, SIOCBRDELBR
, bridge
->ifname
);
488 static int system_bridge_if(const char *bridge
, struct device
*dev
, int cmd
, void *data
)
492 memset(&ifr
, 0, sizeof(ifr
));
494 ifr
.ifr_ifindex
= dev
->ifindex
;
497 strncpy(ifr
.ifr_name
, bridge
, sizeof(ifr
.ifr_name
));
498 return ioctl(sock_ioctl
, cmd
, &ifr
);
501 static bool system_is_bridge(const char *name
, char *buf
, int buflen
)
505 snprintf(buf
, buflen
, "/sys/devices/virtual/net/%s/bridge", name
);
506 if (stat(buf
, &st
) < 0)
512 static char *system_get_bridge(const char *name
, char *buf
, int buflen
)
518 snprintf(buf
, buflen
, "/sys/devices/virtual/net/*/brif/%s/bridge", name
);
519 if (glob(buf
, GLOB_NOSORT
, NULL
, &gl
) < 0)
523 len
= readlink(gl
.gl_pathv
[0], buf
, buflen
);
531 path
= strrchr(buf
, '/');
538 static void system_bridge_set_wireless(const char *bridge
, const char *dev
)
540 snprintf(dev_buf
, sizeof(dev_buf
),
541 "/sys/devices/virtual/net/%s/brif/%s/multicast_to_unicast",
543 system_set_sysctl(dev_buf
, "1");
546 int system_bridge_addif(struct device
*bridge
, struct device
*dev
)
551 oldbr
= system_get_bridge(dev
->ifname
, dev_buf
, sizeof(dev_buf
));
552 if (!oldbr
|| strcmp(oldbr
, bridge
->ifname
) != 0)
553 ret
= system_bridge_if(bridge
->ifname
, dev
, SIOCBRADDIF
, NULL
);
556 system_bridge_set_wireless(bridge
->ifname
, dev
->ifname
);
561 int system_bridge_delif(struct device
*bridge
, struct device
*dev
)
563 return system_bridge_if(bridge
->ifname
, dev
, SIOCBRDELIF
, NULL
);
566 int system_if_resolve(struct device
*dev
)
569 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
570 if (!ioctl(sock_ioctl
, SIOCGIFINDEX
, &ifr
))
571 return ifr
.ifr_ifindex
;
576 static int system_if_flags(const char *ifname
, unsigned add
, unsigned rem
)
580 memset(&ifr
, 0, sizeof(ifr
));
581 strncpy(ifr
.ifr_name
, ifname
, sizeof(ifr
.ifr_name
));
582 ioctl(sock_ioctl
, SIOCGIFFLAGS
, &ifr
);
583 ifr
.ifr_flags
|= add
;
584 ifr
.ifr_flags
&= ~rem
;
585 return ioctl(sock_ioctl
, SIOCSIFFLAGS
, &ifr
);
597 static bool check_ifaddr(struct nlmsghdr
*hdr
, int ifindex
)
599 struct ifaddrmsg
*ifa
= NLMSG_DATA(hdr
);
601 return ifa
->ifa_index
== ifindex
;
604 static bool check_route(struct nlmsghdr
*hdr
, int ifindex
)
606 struct rtmsg
*r
= NLMSG_DATA(hdr
);
607 struct nlattr
*tb
[__RTA_MAX
];
609 if (r
->rtm_protocol
== RTPROT_KERNEL
&&
610 r
->rtm_family
== AF_INET6
)
613 nlmsg_parse(hdr
, sizeof(struct rtmsg
), tb
, __RTA_MAX
- 1, NULL
);
617 return *(int *)RTA_DATA(tb
[RTA_OIF
]) == ifindex
;
620 static bool check_rule(struct nlmsghdr
*hdr
, int ifindex
)
625 static int cb_clear_event(struct nl_msg
*msg
, void *arg
)
627 struct clear_data
*clr
= arg
;
628 struct nlmsghdr
*hdr
= nlmsg_hdr(msg
);
629 bool (*cb
)(struct nlmsghdr
*, int ifindex
);
635 if (hdr
->nlmsg_type
!= RTM_NEWADDR
)
642 if (hdr
->nlmsg_type
!= RTM_NEWROUTE
)
649 if (hdr
->nlmsg_type
!= RTM_NEWRULE
)
658 if (!cb(hdr
, clr
->dev
? clr
->dev
->ifindex
: 0))
661 if (type
== RTM_DELRULE
)
662 D(SYSTEM
, "Remove a rule\n");
664 D(SYSTEM
, "Remove %s from device %s\n",
665 type
== RTM_DELADDR
? "an address" : "a route",
667 memcpy(nlmsg_hdr(clr
->msg
), hdr
, hdr
->nlmsg_len
);
668 hdr
= nlmsg_hdr(clr
->msg
);
669 hdr
->nlmsg_type
= type
;
670 hdr
->nlmsg_flags
= NLM_F_REQUEST
;
672 nl_socket_disable_auto_ack(sock_rtnl
);
673 nl_send_auto_complete(sock_rtnl
, clr
->msg
);
674 nl_socket_enable_auto_ack(sock_rtnl
);
680 cb_finish_event(struct nl_msg
*msg
, void *arg
)
688 error_handler(struct sockaddr_nl
*nla
, struct nlmsgerr
*err
, void *arg
)
691 *pending
= err
->error
;
696 system_if_clear_entries(struct device
*dev
, int type
, int af
)
698 struct clear_data clr
;
699 struct nl_cb
*cb
= nl_cb_alloc(NL_CB_DEFAULT
);
702 .rtm_flags
= RTM_F_CLONED
,
704 int flags
= NLM_F_DUMP
;
713 clr
.size
= sizeof(struct rtgenmsg
);
716 clr
.size
= sizeof(struct rtmsg
);
725 clr
.msg
= nlmsg_alloc_simple(type
, flags
);
729 nlmsg_append(clr
.msg
, &rtm
, clr
.size
, 0);
730 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb_clear_event
, &clr
);
731 nl_cb_set(cb
, NL_CB_FINISH
, NL_CB_CUSTOM
, cb_finish_event
, &pending
);
732 nl_cb_err(cb
, NL_CB_CUSTOM
, error_handler
, &pending
);
734 nl_send_auto_complete(sock_rtnl
, clr
.msg
);
736 nl_recvmsgs(sock_rtnl
, cb
);
744 * Clear bridge (membership) state and bring down device
746 void system_if_clear_state(struct device
*dev
)
748 static char buf
[256];
751 device_set_ifindex(dev
, system_if_resolve(dev
));
752 if (dev
->external
|| !dev
->ifindex
)
755 system_if_flags(dev
->ifname
, 0, IFF_UP
);
757 if (system_is_bridge(dev
->ifname
, buf
, sizeof(buf
))) {
758 D(SYSTEM
, "Delete existing bridge named '%s'\n", dev
->ifname
);
759 system_bridge_delbr(dev
);
763 bridge
= system_get_bridge(dev
->ifname
, buf
, sizeof(buf
));
765 D(SYSTEM
, "Remove device '%s' from bridge '%s'\n", dev
->ifname
, bridge
);
766 system_bridge_if(bridge
, dev
, SIOCBRDELIF
, NULL
);
769 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET
);
770 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET
);
771 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET6
);
772 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET6
);
773 system_set_disable_ipv6(dev
, "0");
776 static inline unsigned long
777 sec_to_jiffies(int val
)
779 return (unsigned long) val
* 100;
782 int system_bridge_addbr(struct device
*bridge
, struct bridge_config
*cfg
)
784 unsigned long args
[4] = {};
786 if (ioctl(sock_ioctl
, SIOCBRADDBR
, bridge
->ifname
) < 0)
789 args
[0] = BRCTL_SET_BRIDGE_STP_STATE
;
790 args
[1] = !!cfg
->stp
;
791 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
793 args
[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY
;
794 args
[1] = sec_to_jiffies(cfg
->forward_delay
);
795 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
797 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
798 bridge
->ifname
, cfg
->igmp_snoop
? "1" : "0");
800 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
801 bridge
->ifname
, cfg
->igmp_snoop
? "1" : "0");
803 args
[0] = BRCTL_SET_BRIDGE_PRIORITY
;
804 args
[1] = cfg
->priority
;
805 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
807 if (cfg
->flags
& BRIDGE_OPT_AGEING_TIME
) {
808 args
[0] = BRCTL_SET_AGEING_TIME
;
809 args
[1] = sec_to_jiffies(cfg
->ageing_time
);
810 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
813 if (cfg
->flags
& BRIDGE_OPT_HELLO_TIME
) {
814 args
[0] = BRCTL_SET_BRIDGE_HELLO_TIME
;
815 args
[1] = sec_to_jiffies(cfg
->hello_time
);
816 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
819 if (cfg
->flags
& BRIDGE_OPT_MAX_AGE
) {
820 args
[0] = BRCTL_SET_BRIDGE_MAX_AGE
;
821 args
[1] = sec_to_jiffies(cfg
->max_age
);
822 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
828 int system_macvlan_add(struct device
*macvlan
, struct device
*dev
, struct macvlan_config
*cfg
)
831 struct nlattr
*linkinfo
, *data
;
832 struct ifinfomsg iim
= { .ifi_family
= AF_UNSPEC
, };
834 static const struct {
836 enum macvlan_mode val
;
838 { "private", MACVLAN_MODE_PRIVATE
},
839 { "vepa", MACVLAN_MODE_VEPA
},
840 { "bridge", MACVLAN_MODE_BRIDGE
},
841 { "passthru", MACVLAN_MODE_PASSTHRU
},
844 msg
= nlmsg_alloc_simple(RTM_NEWLINK
, NLM_F_REQUEST
| NLM_F_CREATE
| NLM_F_EXCL
);
849 nlmsg_append(msg
, &iim
, sizeof(iim
), 0);
851 if (cfg
->flags
& MACVLAN_OPT_MACADDR
)
852 nla_put(msg
, IFLA_ADDRESS
, sizeof(cfg
->macaddr
), cfg
->macaddr
);
853 nla_put_string(msg
, IFLA_IFNAME
, macvlan
->ifname
);
854 nla_put_u32(msg
, IFLA_LINK
, dev
->ifindex
);
856 if (!(linkinfo
= nla_nest_start(msg
, IFLA_LINKINFO
)))
857 goto nla_put_failure
;
859 nla_put_string(msg
, IFLA_INFO_KIND
, "macvlan");
861 if (!(data
= nla_nest_start(msg
, IFLA_INFO_DATA
)))
862 goto nla_put_failure
;
865 for (i
= 0; i
< ARRAY_SIZE(modes
); i
++) {
866 if (strcmp(cfg
->mode
, modes
[i
].name
) != 0)
869 nla_put_u32(msg
, IFLA_MACVLAN_MODE
, modes
[i
].val
);
874 nla_nest_end(msg
, data
);
875 nla_nest_end(msg
, linkinfo
);
877 rv
= system_rtnl_call(msg
);
879 D(SYSTEM
, "Error adding macvlan '%s' over '%s': %d\n", macvlan
->ifname
, dev
->ifname
, rv
);
888 static int system_link_del(const char *ifname
)
891 struct ifinfomsg iim
= {
892 .ifi_family
= AF_UNSPEC
,
896 msg
= nlmsg_alloc_simple(RTM_DELLINK
, NLM_F_REQUEST
);
901 nlmsg_append(msg
, &iim
, sizeof(iim
), 0);
902 nla_put_string(msg
, IFLA_IFNAME
, ifname
);
903 return system_rtnl_call(msg
);
906 int system_macvlan_del(struct device
*macvlan
)
908 return system_link_del(macvlan
->ifname
);
911 static int system_vlan(struct device
*dev
, int id
)
913 struct vlan_ioctl_args ifr
= {
914 .cmd
= SET_VLAN_NAME_TYPE_CMD
,
915 .u
.name_type
= VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD
,
918 ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
921 ifr
.cmd
= DEL_VLAN_CMD
;
924 ifr
.cmd
= ADD_VLAN_CMD
;
927 strncpy(ifr
.device1
, dev
->ifname
, sizeof(ifr
.device1
));
928 return ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
931 int system_vlan_add(struct device
*dev
, int id
)
933 return system_vlan(dev
, id
);
936 int system_vlan_del(struct device
*dev
)
938 return system_vlan(dev
, -1);
941 int system_vlandev_add(struct device
*vlandev
, struct device
*dev
, struct vlandev_config
*cfg
)
944 struct nlattr
*linkinfo
, *data
;
945 struct ifinfomsg iim
= { .ifi_family
= AF_UNSPEC
};
948 msg
= nlmsg_alloc_simple(RTM_NEWLINK
, NLM_F_REQUEST
| NLM_F_CREATE
| NLM_F_EXCL
);
953 nlmsg_append(msg
, &iim
, sizeof(iim
), 0);
954 nla_put_string(msg
, IFLA_IFNAME
, vlandev
->ifname
);
955 nla_put_u32(msg
, IFLA_LINK
, dev
->ifindex
);
957 if (!(linkinfo
= nla_nest_start(msg
, IFLA_LINKINFO
)))
958 goto nla_put_failure
;
960 nla_put_string(msg
, IFLA_INFO_KIND
, "vlan");
962 if (!(data
= nla_nest_start(msg
, IFLA_INFO_DATA
)))
963 goto nla_put_failure
;
965 nla_put_u16(msg
, IFLA_VLAN_ID
, cfg
->vid
);
967 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
968 nla_put_u16(msg
, IFLA_VLAN_PROTOCOL
, htons(cfg
->proto
));
970 if(cfg
->proto
== VLAN_PROTO_8021AD
)
971 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
);
974 nla_nest_end(msg
, data
);
975 nla_nest_end(msg
, linkinfo
);
977 rv
= system_rtnl_call(msg
);
979 D(SYSTEM
, "Error adding vlandev '%s' over '%s': %d\n", vlandev
->ifname
, dev
->ifname
, rv
);
988 int system_vlandev_del(struct device
*vlandev
)
990 return system_link_del(vlandev
->ifname
);
994 system_if_get_settings(struct device
*dev
, struct device_settings
*s
)
999 memset(&ifr
, 0, sizeof(ifr
));
1000 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
1002 if (ioctl(sock_ioctl
, SIOCGIFMTU
, &ifr
) == 0) {
1003 s
->mtu
= ifr
.ifr_mtu
;
1004 s
->flags
|= DEV_OPT_MTU
;
1007 if (ioctl(sock_ioctl
, SIOCGIFTXQLEN
, &ifr
) == 0) {
1008 s
->txqueuelen
= ifr
.ifr_qlen
;
1009 s
->flags
|= DEV_OPT_TXQUEUELEN
;
1012 if (ioctl(sock_ioctl
, SIOCGIFHWADDR
, &ifr
) == 0) {
1013 memcpy(s
->macaddr
, &ifr
.ifr_hwaddr
.sa_data
, sizeof(s
->macaddr
));
1014 s
->flags
|= DEV_OPT_MACADDR
;
1017 if (!system_get_disable_ipv6(dev
, buf
, sizeof(buf
))) {
1018 s
->ipv6
= !strtoul(buf
, NULL
, 0);
1019 s
->flags
|= DEV_OPT_IPV6
;
1022 if (ioctl(sock_ioctl
, SIOCGIFFLAGS
, &ifr
) == 0) {
1023 s
->promisc
= ifr
.ifr_flags
& IFF_PROMISC
;
1024 s
->flags
|= DEV_OPT_PROMISC
;
1027 if (!system_get_rpfilter(dev
, buf
, sizeof(buf
))) {
1028 s
->rpfilter
= strtoul(buf
, NULL
, 0);
1029 s
->flags
|= DEV_OPT_RPFILTER
;
1032 if (!system_get_acceptlocal(dev
, buf
, sizeof(buf
))) {
1033 s
->acceptlocal
= strtoul(buf
, NULL
, 0);
1034 s
->flags
|= DEV_OPT_ACCEPTLOCAL
;
1037 if (!system_get_igmpversion(dev
, buf
, sizeof(buf
))) {
1038 s
->igmpversion
= strtoul(buf
, NULL
, 0);
1039 s
->flags
|= DEV_OPT_IGMPVERSION
;
1042 if (!system_get_mldversion(dev
, buf
, sizeof(buf
))) {
1043 s
->mldversion
= strtoul(buf
, NULL
, 0);
1044 s
->flags
|= DEV_OPT_MLDVERSION
;
1047 if (!system_get_neigh4reachabletime(dev
, buf
, sizeof(buf
))) {
1048 s
->neigh4reachabletime
= strtoul(buf
, NULL
, 0);
1049 s
->flags
|= DEV_OPT_NEIGHREACHABLETIME
;
1052 if (!system_get_neigh6reachabletime(dev
, buf
, sizeof(buf
))) {
1053 s
->neigh6reachabletime
= strtoul(buf
, NULL
, 0);
1054 s
->flags
|= DEV_OPT_NEIGHREACHABLETIME
;
1059 system_if_apply_settings(struct device
*dev
, struct device_settings
*s
, unsigned int apply_mask
)
1066 memset(&ifr
, 0, sizeof(ifr
));
1067 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
1068 if (s
->flags
& DEV_OPT_MTU
& apply_mask
) {
1069 ifr
.ifr_mtu
= s
->mtu
;
1070 if (ioctl(sock_ioctl
, SIOCSIFMTU
, &ifr
) < 0)
1071 s
->flags
&= ~DEV_OPT_MTU
;
1073 if (s
->flags
& DEV_OPT_TXQUEUELEN
& apply_mask
) {
1074 ifr
.ifr_qlen
= s
->txqueuelen
;
1075 if (ioctl(sock_ioctl
, SIOCSIFTXQLEN
, &ifr
) < 0)
1076 s
->flags
&= ~DEV_OPT_TXQUEUELEN
;
1078 if ((s
->flags
& DEV_OPT_MACADDR
& apply_mask
) && !dev
->external
) {
1079 ifr
.ifr_hwaddr
.sa_family
= ARPHRD_ETHER
;
1080 memcpy(&ifr
.ifr_hwaddr
.sa_data
, s
->macaddr
, sizeof(s
->macaddr
));
1081 if (ioctl(sock_ioctl
, SIOCSIFHWADDR
, &ifr
) < 0)
1082 s
->flags
&= ~DEV_OPT_MACADDR
;
1084 if (s
->flags
& DEV_OPT_IPV6
& apply_mask
)
1085 system_set_disable_ipv6(dev
, s
->ipv6
? "0" : "1");
1086 if (s
->flags
& DEV_OPT_PROMISC
& apply_mask
) {
1087 if (system_if_flags(dev
->ifname
, s
->promisc
? IFF_PROMISC
: 0,
1088 !s
->promisc
? IFF_PROMISC
: 0) < 0)
1089 s
->flags
&= ~DEV_OPT_PROMISC
;
1091 if (s
->flags
& DEV_OPT_RPFILTER
& apply_mask
) {
1094 snprintf(buf
, sizeof(buf
), "%d", s
->rpfilter
);
1095 system_set_rpfilter(dev
, buf
);
1097 if (s
->flags
& DEV_OPT_ACCEPTLOCAL
& apply_mask
)
1098 system_set_acceptlocal(dev
, s
->acceptlocal
? "1" : "0");
1099 if (s
->flags
& DEV_OPT_IGMPVERSION
& apply_mask
) {
1102 snprintf(buf
, sizeof(buf
), "%d", s
->igmpversion
);
1103 system_set_igmpversion(dev
, buf
);
1105 if (s
->flags
& DEV_OPT_MLDVERSION
& apply_mask
) {
1108 snprintf(buf
, sizeof(buf
), "%d", s
->mldversion
);
1109 system_set_mldversion(dev
, buf
);
1111 if (s
->flags
& DEV_OPT_NEIGHREACHABLETIME
& apply_mask
) {
1114 snprintf(buf
, sizeof(buf
), "%d", s
->neigh4reachabletime
);
1115 system_set_neigh4reachabletime(dev
, buf
);
1116 snprintf(buf
, sizeof(buf
), "%d", s
->neigh6reachabletime
);
1117 system_set_neigh6reachabletime(dev
, buf
);
1121 int system_if_up(struct device
*dev
)
1123 system_if_get_settings(dev
, &dev
->orig_settings
);
1124 /* Only keep orig settings based on what needs to be set */
1125 dev
->orig_settings
.flags
&= dev
->settings
.flags
;
1126 system_if_apply_settings(dev
, &dev
->settings
, dev
->settings
.flags
);
1127 return system_if_flags(dev
->ifname
, IFF_UP
, 0);
1130 int system_if_down(struct device
*dev
)
1132 int ret
= system_if_flags(dev
->ifname
, 0, IFF_UP
);
1133 system_if_apply_settings(dev
, &dev
->orig_settings
, dev
->orig_settings
.flags
);
1137 struct if_check_data
{
1143 #ifndef IFF_LOWER_UP
1144 #define IFF_LOWER_UP 0x10000
1147 static int cb_if_check_valid(struct nl_msg
*msg
, void *arg
)
1149 struct nlmsghdr
*nh
= nlmsg_hdr(msg
);
1150 struct ifinfomsg
*ifi
= NLMSG_DATA(nh
);
1151 struct if_check_data
*chk
= (struct if_check_data
*)arg
;
1153 if (nh
->nlmsg_type
!= RTM_NEWLINK
)
1156 device_set_present(chk
->dev
, ifi
->ifi_index
> 0 ? true : false);
1157 device_set_link(chk
->dev
, ifi
->ifi_flags
& IFF_LOWER_UP
? true : false);
1162 static int cb_if_check_ack(struct nl_msg
*msg
, void *arg
)
1164 struct if_check_data
*chk
= (struct if_check_data
*)arg
;
1169 static int cb_if_check_error(struct sockaddr_nl
*nla
, struct nlmsgerr
*err
, void *arg
)
1171 struct if_check_data
*chk
= (struct if_check_data
*)arg
;
1173 device_set_present(chk
->dev
, false);
1174 device_set_link(chk
->dev
, false);
1175 chk
->pending
= err
->error
;
1180 int system_if_check(struct device
*dev
)
1182 struct nl_cb
*cb
= nl_cb_alloc(NL_CB_DEFAULT
);
1184 struct ifinfomsg ifi
= {
1185 .ifi_family
= AF_UNSPEC
,
1188 struct if_check_data chk
= {
1194 msg
= nlmsg_alloc_simple(RTM_GETLINK
, 0);
1195 if (!msg
|| nlmsg_append(msg
, &ifi
, sizeof(ifi
), 0) ||
1196 nla_put_string(msg
, IFLA_IFNAME
, dev
->ifname
))
1199 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb_if_check_valid
, &chk
);
1200 nl_cb_set(cb
, NL_CB_ACK
, NL_CB_CUSTOM
, cb_if_check_ack
, &chk
);
1201 nl_cb_err(cb
, NL_CB_CUSTOM
, cb_if_check_error
, &chk
);
1203 nl_send_auto_complete(sock_rtnl
, msg
);
1204 while (chk
.pending
> 0)
1205 nl_recvmsgs(sock_rtnl
, cb
);
1216 system_if_get_parent(struct device
*dev
)
1218 char buf
[64], *devname
;
1219 int ifindex
, iflink
, len
;
1222 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/iflink", dev
->ifname
);
1223 f
= fopen(buf
, "r");
1227 len
= fread(buf
, 1, sizeof(buf
) - 1, f
);
1234 iflink
= strtoul(buf
, NULL
, 0);
1235 ifindex
= system_if_resolve(dev
);
1236 if (!iflink
|| iflink
== ifindex
)
1239 devname
= if_indextoname(iflink
, buf
);
1243 return device_get(devname
, true);
1247 read_string_file(int dir_fd
, const char *file
, char *buf
, int len
)
1253 fd
= openat(dir_fd
, file
, O_RDONLY
);
1258 len
= read(fd
, buf
, len
- 1);
1262 } else if (len
> 0) {
1265 c
= strchr(buf
, '\n');
1278 read_uint64_file(int dir_fd
, const char *file
, uint64_t *val
)
1283 ret
= read_string_file(dir_fd
, file
, buf
, sizeof(buf
));
1285 *val
= strtoull(buf
, NULL
, 0);
1290 /* Assume advertised flags == supported flags */
1291 static const struct {
1294 } ethtool_link_modes
[] = {
1295 { ADVERTISED_10baseT_Half
, "10H" },
1296 { ADVERTISED_10baseT_Full
, "10F" },
1297 { ADVERTISED_100baseT_Half
, "100H" },
1298 { ADVERTISED_100baseT_Full
, "100F" },
1299 { ADVERTISED_1000baseT_Half
, "1000H" },
1300 { ADVERTISED_1000baseT_Full
, "1000F" },
1303 static void system_add_link_modes(struct blob_buf
*b
, __u32 mask
)
1306 for (i
= 0; i
< ARRAY_SIZE(ethtool_link_modes
); i
++) {
1307 if (mask
& ethtool_link_modes
[i
].mask
)
1308 blobmsg_add_string(b
, NULL
, ethtool_link_modes
[i
].name
);
1313 system_if_force_external(const char *ifname
)
1318 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/phy80211", ifname
);
1319 return stat(buf
, &s
) == 0;
1323 system_if_dump_info(struct device
*dev
, struct blob_buf
*b
)
1325 struct ethtool_cmd ecmd
;
1331 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s", dev
->ifname
);
1332 dir_fd
= open(buf
, O_DIRECTORY
);
1334 memset(&ecmd
, 0, sizeof(ecmd
));
1335 memset(&ifr
, 0, sizeof(ifr
));
1336 strcpy(ifr
.ifr_name
, dev
->ifname
);
1337 ifr
.ifr_data
= (caddr_t
) &ecmd
;
1338 ecmd
.cmd
= ETHTOOL_GSET
;
1340 if (ioctl(sock_ioctl
, SIOCETHTOOL
, &ifr
) == 0) {
1341 c
= blobmsg_open_array(b
, "link-advertising");
1342 system_add_link_modes(b
, ecmd
.advertising
);
1343 blobmsg_close_array(b
, c
);
1345 c
= blobmsg_open_array(b
, "link-supported");
1346 system_add_link_modes(b
, ecmd
.supported
);
1347 blobmsg_close_array(b
, c
);
1349 s
= blobmsg_alloc_string_buffer(b
, "speed", 8);
1350 snprintf(s
, 8, "%d%c", ethtool_cmd_speed(&ecmd
),
1351 ecmd
.duplex
== DUPLEX_HALF
? 'H' : 'F');
1352 blobmsg_add_string_buffer(b
);
1360 system_if_dump_stats(struct device
*dev
, struct blob_buf
*b
)
1362 const char *const counters
[] = {
1363 "collisions", "rx_frame_errors", "tx_compressed",
1364 "multicast", "rx_length_errors", "tx_dropped",
1365 "rx_bytes", "rx_missed_errors", "tx_errors",
1366 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1367 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1368 "rx_dropped", "tx_aborted_errors", "tx_packets",
1369 "rx_errors", "tx_bytes", "tx_window_errors",
1370 "rx_fifo_errors", "tx_carrier_errors",
1377 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/statistics", dev
->ifname
);
1378 stats_dir
= open(buf
, O_DIRECTORY
);
1382 for (i
= 0; i
< ARRAY_SIZE(counters
); i
++)
1383 if (read_uint64_file(stats_dir
, counters
[i
], &val
))
1384 blobmsg_add_u64(b
, counters
[i
], val
);
1390 static int system_addr(struct device
*dev
, struct device_addr
*addr
, int cmd
)
1392 bool v4
= ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
);
1393 int alen
= v4
? 4 : 16;
1394 unsigned int flags
= 0;
1395 struct ifaddrmsg ifa
= {
1396 .ifa_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1397 .ifa_prefixlen
= addr
->mask
,
1398 .ifa_index
= dev
->ifindex
,
1402 if (cmd
== RTM_NEWADDR
)
1403 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
1405 msg
= nlmsg_alloc_simple(cmd
, flags
);
1409 nlmsg_append(msg
, &ifa
, sizeof(ifa
), 0);
1410 nla_put(msg
, IFA_LOCAL
, alen
, &addr
->addr
);
1412 if (addr
->broadcast
)
1413 nla_put_u32(msg
, IFA_BROADCAST
, addr
->broadcast
);
1414 if (addr
->point_to_point
)
1415 nla_put_u32(msg
, IFA_ADDRESS
, addr
->point_to_point
);
1417 time_t now
= system_get_rtime();
1418 struct ifa_cacheinfo cinfo
= {0xffffffffU
, 0xffffffffU
, 0, 0};
1420 if (addr
->preferred_until
) {
1421 int64_t preferred
= addr
->preferred_until
- now
;
1424 else if (preferred
> UINT32_MAX
)
1425 preferred
= UINT32_MAX
;
1427 cinfo
.ifa_prefered
= preferred
;
1430 if (addr
->valid_until
) {
1431 int64_t valid
= addr
->valid_until
- now
;
1434 else if (valid
> UINT32_MAX
)
1437 cinfo
.ifa_valid
= valid
;
1440 nla_put(msg
, IFA_CACHEINFO
, sizeof(cinfo
), &cinfo
);
1443 return system_rtnl_call(msg
);
1446 int system_add_address(struct device
*dev
, struct device_addr
*addr
)
1448 return system_addr(dev
, addr
, RTM_NEWADDR
);
1451 int system_del_address(struct device
*dev
, struct device_addr
*addr
)
1453 return system_addr(dev
, addr
, RTM_DELADDR
);
1456 static int system_rt(struct device
*dev
, struct device_route
*route
, int cmd
)
1458 int alen
= ((route
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
) ? 4 : 16;
1460 unsigned int flags
= 0;
1463 have_gw
= !!route
->nexthop
.in
.s_addr
;
1465 have_gw
= route
->nexthop
.in6
.s6_addr32
[0] ||
1466 route
->nexthop
.in6
.s6_addr32
[1] ||
1467 route
->nexthop
.in6
.s6_addr32
[2] ||
1468 route
->nexthop
.in6
.s6_addr32
[3];
1470 unsigned int table
= (route
->flags
& (DEVROUTE_TABLE
| DEVROUTE_SRCTABLE
))
1471 ? route
->table
: RT_TABLE_MAIN
;
1473 struct rtmsg rtm
= {
1474 .rtm_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1475 .rtm_dst_len
= route
->mask
,
1476 .rtm_src_len
= route
->sourcemask
,
1477 .rtm_table
= (table
< 256) ? table
: RT_TABLE_UNSPEC
,
1478 .rtm_protocol
= (route
->flags
& DEVADDR_KERNEL
) ? RTPROT_KERNEL
: RTPROT_STATIC
,
1479 .rtm_scope
= RT_SCOPE_NOWHERE
,
1480 .rtm_type
= (cmd
== RTM_DELROUTE
) ? 0: RTN_UNICAST
,
1481 .rtm_flags
= (route
->flags
& DEVROUTE_ONLINK
) ? RTNH_F_ONLINK
: 0,
1485 if (cmd
== RTM_NEWROUTE
) {
1486 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
1488 if (!dev
) { // Add null-route
1489 rtm
.rtm_scope
= RT_SCOPE_UNIVERSE
;
1490 rtm
.rtm_type
= RTN_UNREACHABLE
;
1493 rtm
.rtm_scope
= (have_gw
) ? RT_SCOPE_UNIVERSE
: RT_SCOPE_LINK
;
1496 if (route
->flags
& DEVROUTE_TYPE
) {
1497 rtm
.rtm_type
= route
->type
;
1498 if (!(route
->flags
& (DEVROUTE_TABLE
| DEVROUTE_SRCTABLE
))) {
1499 if (rtm
.rtm_type
== RTN_LOCAL
|| rtm
.rtm_type
== RTN_BROADCAST
||
1500 rtm
.rtm_type
== RTN_NAT
|| rtm
.rtm_type
== RTN_ANYCAST
)
1501 rtm
.rtm_table
= RT_TABLE_LOCAL
;
1504 if (rtm
.rtm_type
== RTN_LOCAL
|| rtm
.rtm_type
== RTN_NAT
) {
1505 rtm
.rtm_scope
= RT_SCOPE_HOST
;
1506 } else if (rtm
.rtm_type
== RTN_BROADCAST
|| rtm
.rtm_type
== RTN_MULTICAST
||
1507 rtm
.rtm_type
== RTN_ANYCAST
) {
1508 rtm
.rtm_scope
= RT_SCOPE_LINK
;
1509 } else if (rtm
.rtm_type
== RTN_BLACKHOLE
|| rtm
.rtm_type
== RTN_UNREACHABLE
||
1510 rtm
.rtm_type
== RTN_PROHIBIT
|| rtm
.rtm_type
== RTN_FAILED_POLICY
) {
1511 rtm
.rtm_scope
= RT_SCOPE_UNIVERSE
;
1516 msg
= nlmsg_alloc_simple(cmd
, flags
);
1520 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
1523 nla_put(msg
, RTA_DST
, alen
, &route
->addr
);
1525 if (route
->sourcemask
) {
1526 if (rtm
.rtm_family
== AF_INET
)
1527 nla_put(msg
, RTA_PREFSRC
, alen
, &route
->source
);
1529 nla_put(msg
, RTA_SRC
, alen
, &route
->source
);
1532 if (route
->metric
> 0)
1533 nla_put_u32(msg
, RTA_PRIORITY
, route
->metric
);
1536 nla_put(msg
, RTA_GATEWAY
, alen
, &route
->nexthop
);
1539 nla_put_u32(msg
, RTA_OIF
, dev
->ifindex
);
1542 nla_put_u32(msg
, RTA_TABLE
, table
);
1544 if (route
->flags
& DEVROUTE_MTU
) {
1545 struct nlattr
*metrics
;
1547 if (!(metrics
= nla_nest_start(msg
, RTA_METRICS
)))
1548 goto nla_put_failure
;
1550 nla_put_u32(msg
, RTAX_MTU
, route
->mtu
);
1552 nla_nest_end(msg
, metrics
);
1555 return system_rtnl_call(msg
);
1562 int system_add_route(struct device
*dev
, struct device_route
*route
)
1564 return system_rt(dev
, route
, RTM_NEWROUTE
);
1567 int system_del_route(struct device
*dev
, struct device_route
*route
)
1569 return system_rt(dev
, route
, RTM_DELROUTE
);
1572 int system_flush_routes(void)
1574 const char *names
[] = {
1575 "/proc/sys/net/ipv4/route/flush",
1576 "/proc/sys/net/ipv6/route/flush"
1580 for (i
= 0; i
< ARRAY_SIZE(names
); i
++) {
1581 fd
= open(names
[i
], O_WRONLY
);
1585 if (write(fd
, "-1", 2)) {}
1591 bool system_resolve_rt_type(const char *type
, unsigned int *id
)
1593 return system_rtn_aton(type
, id
);
1596 bool system_resolve_rt_table(const char *name
, unsigned int *id
)
1600 unsigned int n
, table
= RT_TABLE_UNSPEC
;
1602 /* first try to parse table as number */
1603 if ((n
= strtoul(name
, &e
, 0)) > 0 && !*e
)
1606 /* handle well known aliases */
1607 else if (!strcmp(name
, "default"))
1608 table
= RT_TABLE_DEFAULT
;
1609 else if (!strcmp(name
, "main"))
1610 table
= RT_TABLE_MAIN
;
1611 else if (!strcmp(name
, "local"))
1612 table
= RT_TABLE_LOCAL
;
1613 else if (!strcmp(name
, "prelocal"))
1614 table
= RT_TABLE_PRELOCAL
;
1616 /* try to look up name in /etc/iproute2/rt_tables */
1617 else if ((f
= fopen("/etc/iproute2/rt_tables", "r")) != NULL
)
1619 while (fgets(buf
, sizeof(buf
) - 1, f
) != NULL
)
1621 if ((e
= strtok(buf
, " \t\n")) == NULL
|| *e
== '#')
1624 n
= strtoul(e
, NULL
, 10);
1625 e
= strtok(NULL
, " \t\n");
1627 if (e
&& !strcmp(e
, name
))
1637 if (table
== RT_TABLE_UNSPEC
)
1644 bool system_is_default_rt_table(unsigned int id
)
1646 return (id
== RT_TABLE_MAIN
);
1649 bool system_resolve_rpfilter(const char *filter
, unsigned int *id
)
1654 if (!strcmp(filter
, "strict"))
1656 else if (!strcmp(filter
, "loose"))
1659 n
= strtoul(filter
, &e
, 0);
1660 if (*e
|| e
== filter
|| n
> 2)
1668 static int system_iprule(struct iprule
*rule
, int cmd
)
1670 int alen
= ((rule
->flags
& IPRULE_FAMILY
) == IPRULE_INET4
) ? 4 : 16;
1673 struct rtmsg rtm
= {
1674 .rtm_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1675 .rtm_protocol
= RTPROT_STATIC
,
1676 .rtm_scope
= RT_SCOPE_UNIVERSE
,
1677 .rtm_table
= RT_TABLE_UNSPEC
,
1678 .rtm_type
= RTN_UNSPEC
,
1682 if (cmd
== RTM_NEWRULE
) {
1683 rtm
.rtm_type
= RTN_UNICAST
;
1684 rtm
.rtm_flags
|= NLM_F_REPLACE
| NLM_F_EXCL
;
1688 rtm
.rtm_flags
|= FIB_RULE_INVERT
;
1690 if (rule
->flags
& IPRULE_SRC
)
1691 rtm
.rtm_src_len
= rule
->src_mask
;
1693 if (rule
->flags
& IPRULE_DEST
)
1694 rtm
.rtm_dst_len
= rule
->dest_mask
;
1696 if (rule
->flags
& IPRULE_TOS
)
1697 rtm
.rtm_tos
= rule
->tos
;
1699 if (rule
->flags
& IPRULE_LOOKUP
) {
1700 if (rule
->lookup
< 256)
1701 rtm
.rtm_table
= rule
->lookup
;
1704 if (rule
->flags
& IPRULE_ACTION
)
1705 rtm
.rtm_type
= rule
->action
;
1706 else if (rule
->flags
& IPRULE_GOTO
)
1707 rtm
.rtm_type
= FR_ACT_GOTO
;
1708 else if (!(rule
->flags
& (IPRULE_LOOKUP
| IPRULE_ACTION
| IPRULE_GOTO
)))
1709 rtm
.rtm_type
= FR_ACT_NOP
;
1711 msg
= nlmsg_alloc_simple(cmd
, NLM_F_REQUEST
);
1716 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
1718 if (rule
->flags
& IPRULE_IN
)
1719 nla_put(msg
, FRA_IFNAME
, strlen(rule
->in_dev
) + 1, rule
->in_dev
);
1721 if (rule
->flags
& IPRULE_OUT
)
1722 nla_put(msg
, FRA_OIFNAME
, strlen(rule
->out_dev
) + 1, rule
->out_dev
);
1724 if (rule
->flags
& IPRULE_SRC
)
1725 nla_put(msg
, FRA_SRC
, alen
, &rule
->src_addr
);
1727 if (rule
->flags
& IPRULE_DEST
)
1728 nla_put(msg
, FRA_DST
, alen
, &rule
->dest_addr
);
1730 if (rule
->flags
& IPRULE_PRIORITY
)
1731 nla_put_u32(msg
, FRA_PRIORITY
, rule
->priority
);
1732 else if (cmd
== RTM_NEWRULE
)
1733 nla_put_u32(msg
, FRA_PRIORITY
, rule
->order
);
1735 if (rule
->flags
& IPRULE_FWMARK
)
1736 nla_put_u32(msg
, FRA_FWMARK
, rule
->fwmark
);
1738 if (rule
->flags
& IPRULE_FWMASK
)
1739 nla_put_u32(msg
, FRA_FWMASK
, rule
->fwmask
);
1741 if (rule
->flags
& IPRULE_LOOKUP
) {
1742 if (rule
->lookup
>= 256)
1743 nla_put_u32(msg
, FRA_TABLE
, rule
->lookup
);
1746 if (rule
->flags
& IPRULE_GOTO
)
1747 nla_put_u32(msg
, FRA_GOTO
, rule
->gotoid
);
1749 return system_rtnl_call(msg
);
1752 int system_add_iprule(struct iprule
*rule
)
1754 return system_iprule(rule
, RTM_NEWRULE
);
1757 int system_del_iprule(struct iprule
*rule
)
1759 return system_iprule(rule
, RTM_DELRULE
);
1762 int system_flush_iprules(void)
1767 system_if_clear_entries(NULL
, RTM_GETRULE
, AF_INET
);
1768 system_if_clear_entries(NULL
, RTM_GETRULE
, AF_INET6
);
1770 memset(&rule
, 0, sizeof(rule
));
1773 rule
.flags
= IPRULE_INET4
| IPRULE_PRIORITY
| IPRULE_LOOKUP
;
1776 rule
.lookup
= RT_TABLE_PRELOCAL
;
1777 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1780 rule
.lookup
= RT_TABLE_LOCAL
;
1781 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1783 rule
.priority
= 32766;
1784 rule
.lookup
= RT_TABLE_MAIN
;
1785 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1787 rule
.priority
= 32767;
1788 rule
.lookup
= RT_TABLE_DEFAULT
;
1789 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1792 rule
.flags
= IPRULE_INET6
| IPRULE_PRIORITY
| IPRULE_LOOKUP
;
1795 rule
.lookup
= RT_TABLE_PRELOCAL
;
1796 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1799 rule
.lookup
= RT_TABLE_LOCAL
;
1800 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1802 rule
.priority
= 32766;
1803 rule
.lookup
= RT_TABLE_MAIN
;
1804 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1809 bool system_resolve_iprule_action(const char *action
, unsigned int *id
)
1811 return system_rtn_aton(action
, id
);
1814 time_t system_get_rtime(void)
1819 if (syscall(__NR_clock_gettime
, CLOCK_MONOTONIC
, &ts
) == 0)
1822 if (gettimeofday(&tv
, NULL
) == 0)
1829 #define IP_DF 0x4000
1832 static int tunnel_ioctl(const char *name
, int cmd
, void *p
)
1836 memset(&ifr
, 0, sizeof(ifr
));
1837 strncpy(ifr
.ifr_name
, name
, sizeof(ifr
.ifr_name
));
1838 ifr
.ifr_ifru
.ifru_data
= p
;
1839 return ioctl(sock_ioctl
, cmd
, &ifr
);
1842 #ifdef IFLA_IPTUN_MAX
1843 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
1844 static int system_add_gre_tunnel(const char *name
, const char *kind
,
1845 const unsigned int link
, struct blob_attr
**tb
, bool v6
)
1848 struct ifinfomsg ifi
= { .ifi_family
= AF_UNSPEC
, };
1849 struct blob_attr
*cur
;
1850 uint32_t ikey
= 0, okey
= 0, flags
= 0, flowinfo
= 0;
1851 uint16_t iflags
= 0, oflags
= 0;
1853 int ret
= 0, ttl
= 64;
1855 nlm
= nlmsg_alloc_simple(RTM_NEWLINK
, NLM_F_REQUEST
| NLM_F_REPLACE
| NLM_F_CREATE
);
1859 nlmsg_append(nlm
, &ifi
, sizeof(ifi
), 0);
1860 nla_put_string(nlm
, IFLA_IFNAME
, name
);
1862 struct nlattr
*linkinfo
= nla_nest_start(nlm
, IFLA_LINKINFO
);
1868 nla_put_string(nlm
, IFLA_INFO_KIND
, kind
);
1869 struct nlattr
*infodata
= nla_nest_start(nlm
, IFLA_INFO_DATA
);
1876 nla_put_u32(nlm
, IFLA_GRE_LINK
, link
);
1878 if ((cur
= tb
[TUNNEL_ATTR_TTL
]))
1879 ttl
= blobmsg_get_u32(cur
);
1881 nla_put_u8(nlm
, IFLA_GRE_TTL
, ttl
);
1883 if ((cur
= tb
[TUNNEL_ATTR_TOS
])) {
1884 char *str
= blobmsg_get_string(cur
);
1885 if (strcmp(str
, "inherit")) {
1888 if (!system_tos_aton(str
, &uval
)) {
1894 flowinfo
|= htonl(uval
<< 20) & IP6_FLOWINFO_TCLASS
;
1899 flags
|= IP6_TNL_F_USE_ORIG_TCLASS
;
1905 if ((cur
= tb
[TUNNEL_ATTR_INFO
]) && (blobmsg_type(cur
) == BLOBMSG_TYPE_STRING
)) {
1906 uint8_t icsum
, ocsum
, iseqno
, oseqno
;
1907 if (sscanf(blobmsg_get_string(cur
), "%u,%u,%hhu,%hhu,%hhu,%hhu",
1908 &ikey
, &okey
, &icsum
, &ocsum
, &iseqno
, &oseqno
) < 6) {
1933 struct in6_addr in6buf
;
1934 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
])) {
1935 if (inet_pton(AF_INET6
, blobmsg_data(cur
), &in6buf
) < 1) {
1939 nla_put(nlm
, IFLA_GRE_LOCAL
, sizeof(in6buf
), &in6buf
);
1942 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
])) {
1943 if (inet_pton(AF_INET6
, blobmsg_data(cur
), &in6buf
) < 1) {
1947 nla_put(nlm
, IFLA_GRE_REMOTE
, sizeof(in6buf
), &in6buf
);
1949 nla_put_u8(nlm
, IFLA_GRE_ENCAP_LIMIT
, 4);
1952 nla_put_u32(nlm
, IFLA_GRE_FLOWINFO
, flowinfo
);
1955 nla_put_u32(nlm
, IFLA_GRE_FLAGS
, flags
);
1957 struct in_addr inbuf
;
1960 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
])) {
1961 if (inet_pton(AF_INET
, blobmsg_data(cur
), &inbuf
) < 1) {
1965 nla_put(nlm
, IFLA_GRE_LOCAL
, sizeof(inbuf
), &inbuf
);
1968 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
])) {
1969 if (inet_pton(AF_INET
, blobmsg_data(cur
), &inbuf
) < 1) {
1973 nla_put(nlm
, IFLA_GRE_REMOTE
, sizeof(inbuf
), &inbuf
);
1975 if (IN_MULTICAST(ntohl(inbuf
.s_addr
))) {
1977 okey
= inbuf
.s_addr
;
1982 ikey
= inbuf
.s_addr
;
1988 if ((cur
= tb
[TUNNEL_ATTR_DF
]))
1989 set_df
= blobmsg_get_bool(cur
);
1991 /* ttl !=0 and nopmtudisc are incompatible */
1992 if (ttl
&& !set_df
) {
1997 nla_put_u8(nlm
, IFLA_GRE_PMTUDISC
, set_df
? 1 : 0);
1999 nla_put_u8(nlm
, IFLA_GRE_TOS
, tos
);
2003 nla_put_u16(nlm
, IFLA_GRE_OFLAGS
, oflags
);
2006 nla_put_u16(nlm
, IFLA_GRE_IFLAGS
, iflags
);
2009 nla_put_u32(nlm
, IFLA_GRE_OKEY
, okey
);
2012 nla_put_u32(nlm
, IFLA_GRE_IKEY
, ikey
);
2014 nla_nest_end(nlm
, infodata
);
2015 nla_nest_end(nlm
, linkinfo
);
2017 return system_rtnl_call(nlm
);
2025 static int system_add_proto_tunnel(const char *name
, const uint8_t proto
, const unsigned int link
, struct blob_attr
**tb
)
2027 struct blob_attr
*cur
;
2029 struct ip_tunnel_parm p
= {
2038 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
]) &&
2039 inet_pton(AF_INET
, blobmsg_data(cur
), &p
.iph
.saddr
) < 1)
2042 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
]) &&
2043 inet_pton(AF_INET
, blobmsg_data(cur
), &p
.iph
.daddr
) < 1)
2046 if ((cur
= tb
[TUNNEL_ATTR_DF
]))
2047 set_df
= blobmsg_get_bool(cur
);
2049 if ((cur
= tb
[TUNNEL_ATTR_TTL
]))
2050 p
.iph
.ttl
= blobmsg_get_u32(cur
);
2052 if ((cur
= tb
[TUNNEL_ATTR_TOS
])) {
2053 char *str
= blobmsg_get_string(cur
);
2054 if (strcmp(str
, "inherit")) {
2057 if (!system_tos_aton(str
, &uval
))
2065 p
.iph
.frag_off
= set_df
? htons(IP_DF
) : 0;
2066 /* ttl !=0 and nopmtudisc are incompatible */
2067 if (p
.iph
.ttl
&& p
.iph
.frag_off
== 0)
2070 strncpy(p
.name
, name
, sizeof(p
.name
));
2072 switch (p
.iph
.protocol
) {
2074 return tunnel_ioctl("tunl0", SIOCADDTUNNEL
, &p
);
2076 return tunnel_ioctl("sit0", SIOCADDTUNNEL
, &p
);
2083 static int __system_del_ip_tunnel(const char *name
, struct blob_attr
**tb
)
2085 struct blob_attr
*cur
;
2088 if (!(cur
= tb
[TUNNEL_ATTR_TYPE
]))
2090 str
= blobmsg_data(cur
);
2092 if (!strcmp(str
, "greip") || !strcmp(str
, "gretapip") ||
2093 !strcmp(str
, "greip6") || !strcmp(str
, "gretapip6"))
2094 return system_link_del(name
);
2096 return tunnel_ioctl(name
, SIOCDELTUNNEL
, NULL
);
2099 int system_del_ip_tunnel(const char *name
, struct blob_attr
*attr
)
2101 struct blob_attr
*tb
[__TUNNEL_ATTR_MAX
];
2103 blobmsg_parse(tunnel_attr_list
.params
, __TUNNEL_ATTR_MAX
, tb
,
2104 blob_data(attr
), blob_len(attr
));
2106 return __system_del_ip_tunnel(name
, tb
);
2109 int system_update_ipv6_mtu(struct device
*dev
, int mtu
)
2113 snprintf(buf
, sizeof(buf
), "/proc/sys/net/ipv6/conf/%s/mtu",
2116 int fd
= open(buf
, O_RDWR
);
2117 ssize_t len
= read(fd
, buf
, sizeof(buf
) - 1);
2124 if (!mtu
|| ret
<= mtu
)
2127 lseek(fd
, 0, SEEK_SET
);
2128 if (write(fd
, buf
, snprintf(buf
, sizeof(buf
), "%i", mtu
)) <= 0)
2136 int system_add_ip_tunnel(const char *name
, struct blob_attr
*attr
)
2138 struct blob_attr
*tb
[__TUNNEL_ATTR_MAX
];
2139 struct blob_attr
*cur
;
2142 blobmsg_parse(tunnel_attr_list
.params
, __TUNNEL_ATTR_MAX
, tb
,
2143 blob_data(attr
), blob_len(attr
));
2145 __system_del_ip_tunnel(name
, tb
);
2147 if (!(cur
= tb
[TUNNEL_ATTR_TYPE
]))
2149 str
= blobmsg_data(cur
);
2151 unsigned int ttl
= 0;
2152 if ((cur
= tb
[TUNNEL_ATTR_TTL
])) {
2153 ttl
= blobmsg_get_u32(cur
);
2158 unsigned int link
= 0;
2159 if ((cur
= tb
[TUNNEL_ATTR_LINK
])) {
2160 struct interface
*iface
= vlist_find(&interfaces
, blobmsg_data(cur
), iface
, node
);
2164 if (iface
->l3_dev
.dev
)
2165 link
= iface
->l3_dev
.dev
->ifindex
;
2168 if (!strcmp(str
, "sit")) {
2169 if (system_add_proto_tunnel(name
, IPPROTO_IPV6
, link
, tb
) < 0)
2173 if ((cur
= tb
[TUNNEL_ATTR_6RD_PREFIX
])) {
2175 struct ip_tunnel_6rd p6
;
2177 memset(&p6
, 0, sizeof(p6
));
2179 if (!parse_ip_and_netmask(AF_INET6
, blobmsg_data(cur
),
2180 &p6
.prefix
, &mask
) || mask
> 128)
2182 p6
.prefixlen
= mask
;
2184 if ((cur
= tb
[TUNNEL_ATTR_6RD_RELAY_PREFIX
])) {
2185 if (!parse_ip_and_netmask(AF_INET
, blobmsg_data(cur
),
2186 &p6
.relay_prefix
, &mask
) || mask
> 32)
2188 p6
.relay_prefixlen
= mask
;
2191 if (tunnel_ioctl(name
, SIOCADD6RD
, &p6
) < 0) {
2192 __system_del_ip_tunnel(name
, tb
);
2197 #ifdef IFLA_IPTUN_MAX
2198 } else if (!strcmp(str
, "ipip6")) {
2199 struct nl_msg
*nlm
= nlmsg_alloc_simple(RTM_NEWLINK
,
2200 NLM_F_REQUEST
| NLM_F_REPLACE
| NLM_F_CREATE
);
2201 struct ifinfomsg ifi
= { .ifi_family
= AF_UNSPEC
};
2207 nlmsg_append(nlm
, &ifi
, sizeof(ifi
), 0);
2208 nla_put_string(nlm
, IFLA_IFNAME
, name
);
2211 nla_put_u32(nlm
, IFLA_LINK
, link
);
2213 struct nlattr
*linkinfo
= nla_nest_start(nlm
, IFLA_LINKINFO
);
2218 nla_put_string(nlm
, IFLA_INFO_KIND
, "ip6tnl");
2219 struct nlattr
*infodata
= nla_nest_start(nlm
, IFLA_INFO_DATA
);
2226 nla_put_u32(nlm
, IFLA_IPTUN_LINK
, link
);
2228 nla_put_u8(nlm
, IFLA_IPTUN_PROTO
, IPPROTO_IPIP
);
2229 nla_put_u8(nlm
, IFLA_IPTUN_TTL
, (ttl
) ? ttl
: 64);
2230 nla_put_u8(nlm
, IFLA_IPTUN_ENCAP_LIMIT
, 4);
2232 struct in6_addr in6buf
;
2233 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
])) {
2234 if (inet_pton(AF_INET6
, blobmsg_data(cur
), &in6buf
) < 1) {
2238 nla_put(nlm
, IFLA_IPTUN_LOCAL
, sizeof(in6buf
), &in6buf
);
2241 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
])) {
2242 if (inet_pton(AF_INET6
, blobmsg_data(cur
), &in6buf
) < 1) {
2246 nla_put(nlm
, IFLA_IPTUN_REMOTE
, sizeof(in6buf
), &in6buf
);
2249 #ifdef IFLA_IPTUN_FMR_MAX
2250 if ((cur
= tb
[TUNNEL_ATTR_FMRS
])) {
2251 struct nlattr
*fmrs
= nla_nest_start(nlm
, IFLA_IPTUN_FMRS
);
2253 struct blob_attr
*fmr
;
2254 unsigned rem
, fmrcnt
= 0;
2255 blobmsg_for_each_attr(fmr
, cur
, rem
) {
2256 if (blobmsg_type(fmr
) != BLOBMSG_TYPE_STRING
)
2259 unsigned ip4len
, ip6len
, ealen
, offset
= 6;
2263 if (sscanf(blobmsg_get_string(fmr
), "%47[^/]/%u,%15[^/]/%u,%u,%u",
2264 ip6buf
, &ip6len
, ip4buf
, &ip4len
, &ealen
, &offset
) < 5) {
2269 struct in6_addr ip6prefix
;
2270 struct in_addr ip4prefix
;
2271 if (inet_pton(AF_INET6
, ip6buf
, &ip6prefix
) != 1 ||
2272 inet_pton(AF_INET
, ip4buf
, &ip4prefix
) != 1) {
2277 struct nlattr
*rule
= nla_nest_start(nlm
, ++fmrcnt
);
2279 nla_put(nlm
, IFLA_IPTUN_FMR_IP6_PREFIX
, sizeof(ip6prefix
), &ip6prefix
);
2280 nla_put(nlm
, IFLA_IPTUN_FMR_IP4_PREFIX
, sizeof(ip4prefix
), &ip4prefix
);
2281 nla_put_u8(nlm
, IFLA_IPTUN_FMR_IP6_PREFIX_LEN
, ip6len
);
2282 nla_put_u8(nlm
, IFLA_IPTUN_FMR_IP4_PREFIX_LEN
, ip4len
);
2283 nla_put_u8(nlm
, IFLA_IPTUN_FMR_EA_LEN
, ealen
);
2284 nla_put_u8(nlm
, IFLA_IPTUN_FMR_OFFSET
, offset
);
2286 nla_nest_end(nlm
, rule
);
2289 nla_nest_end(nlm
, fmrs
);
2293 nla_nest_end(nlm
, infodata
);
2294 nla_nest_end(nlm
, linkinfo
);
2296 return system_rtnl_call(nlm
);
2300 } else if (!strcmp(str
, "greip")) {
2301 return system_add_gre_tunnel(name
, "gre", link
, tb
, false);
2302 } else if (!strcmp(str
, "gretapip")) {
2303 return system_add_gre_tunnel(name
, "gretap", link
, tb
, false);
2304 } else if (!strcmp(str
, "greip6")) {
2305 return system_add_gre_tunnel(name
, "ip6gre", link
, tb
, true);
2306 } else if (!strcmp(str
, "gretapip6")) {
2307 return system_add_gre_tunnel(name
, "ip6gretap", link
, tb
, true);
2309 } else if (!strcmp(str
, "ipip")) {
2310 return system_add_proto_tunnel(name
, IPPROTO_IPIP
, link
, tb
);