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 void system_set_neigh4reachabletime(struct device
*dev
, const char *val
)
290 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev
->ifname
, val
);
293 static void system_set_neigh6reachabletime(struct device
*dev
, const char *val
)
295 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev
->ifname
, val
);
298 static int system_get_sysctl(const char *path
, char *buf
, const size_t buf_sz
)
300 int fd
= -1, ret
= -1;
302 fd
= open(path
, O_RDONLY
);
306 ssize_t len
= read(fd
, buf
, buf_sz
- 1);
320 system_get_dev_sysctl(const char *path
, const char *device
, char *buf
, const size_t buf_sz
)
322 snprintf(dev_buf
, sizeof(dev_buf
), path
, device
);
323 return system_get_sysctl(dev_buf
, buf
, buf_sz
);
326 static int system_get_disable_ipv6(struct device
*dev
, char *buf
, const size_t buf_sz
)
328 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
329 dev
->ifname
, buf
, buf_sz
);
332 static int system_get_rpfilter(struct device
*dev
, char *buf
, const size_t buf_sz
)
334 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
335 dev
->ifname
, buf
, buf_sz
);
338 static int system_get_acceptlocal(struct device
*dev
, char *buf
, const size_t buf_sz
)
340 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
341 dev
->ifname
, buf
, buf_sz
);
344 static int system_get_igmpversion(struct device
*dev
, char *buf
, const size_t buf_sz
)
346 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
347 dev
->ifname
, buf
, buf_sz
);
350 static int system_get_mldversion(struct device
*dev
, char *buf
, const size_t buf_sz
)
352 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
353 dev
->ifname
, buf
, buf_sz
);
356 static int system_get_neigh4reachabletime(struct device
*dev
, char *buf
, const size_t buf_sz
)
358 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
359 dev
->ifname
, buf
, buf_sz
);
362 static int system_get_neigh6reachabletime(struct device
*dev
, char *buf
, const size_t buf_sz
)
364 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
365 dev
->ifname
, buf
, buf_sz
);
368 // Evaluate netlink messages
369 static int cb_rtnl_event(struct nl_msg
*msg
, void *arg
)
371 struct nlmsghdr
*nh
= nlmsg_hdr(msg
);
372 struct ifinfomsg
*ifi
= NLMSG_DATA(nh
);
373 struct nlattr
*nla
[__IFLA_MAX
];
377 if (nh
->nlmsg_type
!= RTM_NEWLINK
)
380 nlmsg_parse(nh
, sizeof(*ifi
), nla
, __IFLA_MAX
- 1, NULL
);
381 if (!nla
[IFLA_IFNAME
])
384 struct device
*dev
= device_get(nla_data(nla
[IFLA_IFNAME
]), false);
385 if (!dev
|| dev
->type
->keep_link_status
)
388 if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev
->ifname
, buf
, sizeof(buf
)))
389 link_state
= strtoul(buf
, NULL
, 0);
391 device_set_link(dev
, link_state
? true : false);
398 handle_hotplug_msg(char *data
, int size
)
400 const char *subsystem
= NULL
, *interface
= NULL
;
401 char *cur
, *end
, *sep
;
406 if (!strncmp(data
, "add@", 4))
408 else if (!strncmp(data
, "remove@", 7))
413 skip
= strlen(data
) + 1;
416 for (cur
= data
+ skip
; cur
< end
; cur
+= skip
) {
417 skip
= strlen(cur
) + 1;
419 sep
= strchr(cur
, '=');
424 if (!strcmp(cur
, "INTERFACE"))
426 else if (!strcmp(cur
, "SUBSYSTEM")) {
428 if (strcmp(subsystem
, "net") != 0)
431 if (subsystem
&& interface
)
437 dev
= device_get(interface
, false);
441 if (dev
->type
!= &simple_device_type
)
444 if (add
&& system_if_force_external(dev
->ifname
))
447 device_set_present(dev
, add
);
451 handle_hotplug_event(struct uloop_fd
*u
, unsigned int events
)
453 struct event_socket
*ev
= container_of(u
, struct event_socket
, uloop
);
454 struct sockaddr_nl nla
;
455 unsigned char *buf
= NULL
;
458 while ((size
= nl_recv(ev
->sock
, &nla
, &buf
, NULL
)) > 0) {
460 handle_hotplug_msg((char *) buf
, size
);
466 static int system_rtnl_call(struct nl_msg
*msg
)
470 ret
= nl_send_auto_complete(sock_rtnl
, msg
);
476 return nl_wait_for_ack(sock_rtnl
);
479 int system_bridge_delbr(struct device
*bridge
)
481 return ioctl(sock_ioctl
, SIOCBRDELBR
, bridge
->ifname
);
484 static int system_bridge_if(const char *bridge
, struct device
*dev
, int cmd
, void *data
)
488 memset(&ifr
, 0, sizeof(ifr
));
490 ifr
.ifr_ifindex
= dev
->ifindex
;
493 strncpy(ifr
.ifr_name
, bridge
, sizeof(ifr
.ifr_name
));
494 return ioctl(sock_ioctl
, cmd
, &ifr
);
497 static bool system_is_bridge(const char *name
, char *buf
, int buflen
)
501 snprintf(buf
, buflen
, "/sys/devices/virtual/net/%s/bridge", name
);
502 if (stat(buf
, &st
) < 0)
508 static char *system_get_bridge(const char *name
, char *buf
, int buflen
)
514 snprintf(buf
, buflen
, "/sys/devices/virtual/net/*/brif/%s/bridge", name
);
515 if (glob(buf
, GLOB_NOSORT
, NULL
, &gl
) < 0)
519 len
= readlink(gl
.gl_pathv
[0], buf
, buflen
);
527 path
= strrchr(buf
, '/');
534 static void system_bridge_set_wireless(const char *bridge
, const char *dev
)
536 snprintf(dev_buf
, sizeof(dev_buf
),
537 "/sys/devices/virtual/net/%s/brif/%s/multicast_to_unicast",
539 system_set_sysctl(dev_buf
, "1");
542 int system_bridge_addif(struct device
*bridge
, struct device
*dev
)
547 oldbr
= system_get_bridge(dev
->ifname
, dev_buf
, sizeof(dev_buf
));
548 if (!oldbr
|| strcmp(oldbr
, bridge
->ifname
) != 0)
549 ret
= system_bridge_if(bridge
->ifname
, dev
, SIOCBRADDIF
, NULL
);
552 system_bridge_set_wireless(bridge
->ifname
, dev
->ifname
);
557 int system_bridge_delif(struct device
*bridge
, struct device
*dev
)
559 return system_bridge_if(bridge
->ifname
, dev
, SIOCBRDELIF
, NULL
);
562 int system_if_resolve(struct device
*dev
)
565 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
566 if (!ioctl(sock_ioctl
, SIOCGIFINDEX
, &ifr
))
567 return ifr
.ifr_ifindex
;
572 static int system_if_flags(const char *ifname
, unsigned add
, unsigned rem
)
576 memset(&ifr
, 0, sizeof(ifr
));
577 strncpy(ifr
.ifr_name
, ifname
, sizeof(ifr
.ifr_name
));
578 ioctl(sock_ioctl
, SIOCGIFFLAGS
, &ifr
);
579 ifr
.ifr_flags
|= add
;
580 ifr
.ifr_flags
&= ~rem
;
581 return ioctl(sock_ioctl
, SIOCSIFFLAGS
, &ifr
);
593 static bool check_ifaddr(struct nlmsghdr
*hdr
, int ifindex
)
595 struct ifaddrmsg
*ifa
= NLMSG_DATA(hdr
);
597 return ifa
->ifa_index
== ifindex
;
600 static bool check_route(struct nlmsghdr
*hdr
, int ifindex
)
602 struct rtmsg
*r
= NLMSG_DATA(hdr
);
603 struct nlattr
*tb
[__RTA_MAX
];
605 if (r
->rtm_protocol
== RTPROT_KERNEL
&&
606 r
->rtm_family
== AF_INET6
)
609 nlmsg_parse(hdr
, sizeof(struct rtmsg
), tb
, __RTA_MAX
- 1, NULL
);
613 return *(int *)RTA_DATA(tb
[RTA_OIF
]) == ifindex
;
616 static bool check_rule(struct nlmsghdr
*hdr
, int ifindex
)
621 static int cb_clear_event(struct nl_msg
*msg
, void *arg
)
623 struct clear_data
*clr
= arg
;
624 struct nlmsghdr
*hdr
= nlmsg_hdr(msg
);
625 bool (*cb
)(struct nlmsghdr
*, int ifindex
);
631 if (hdr
->nlmsg_type
!= RTM_NEWADDR
)
638 if (hdr
->nlmsg_type
!= RTM_NEWROUTE
)
645 if (hdr
->nlmsg_type
!= RTM_NEWRULE
)
654 if (!cb(hdr
, clr
->dev
? clr
->dev
->ifindex
: 0))
657 if (type
== RTM_DELRULE
)
658 D(SYSTEM
, "Remove a rule\n");
660 D(SYSTEM
, "Remove %s from device %s\n",
661 type
== RTM_DELADDR
? "an address" : "a route",
663 memcpy(nlmsg_hdr(clr
->msg
), hdr
, hdr
->nlmsg_len
);
664 hdr
= nlmsg_hdr(clr
->msg
);
665 hdr
->nlmsg_type
= type
;
666 hdr
->nlmsg_flags
= NLM_F_REQUEST
;
668 nl_socket_disable_auto_ack(sock_rtnl
);
669 nl_send_auto_complete(sock_rtnl
, clr
->msg
);
670 nl_socket_enable_auto_ack(sock_rtnl
);
676 cb_finish_event(struct nl_msg
*msg
, void *arg
)
684 error_handler(struct sockaddr_nl
*nla
, struct nlmsgerr
*err
, void *arg
)
687 *pending
= err
->error
;
692 system_if_clear_entries(struct device
*dev
, int type
, int af
)
694 struct clear_data clr
;
695 struct nl_cb
*cb
= nl_cb_alloc(NL_CB_DEFAULT
);
698 .rtm_flags
= RTM_F_CLONED
,
700 int flags
= NLM_F_DUMP
;
709 clr
.size
= sizeof(struct rtgenmsg
);
712 clr
.size
= sizeof(struct rtmsg
);
721 clr
.msg
= nlmsg_alloc_simple(type
, flags
);
725 nlmsg_append(clr
.msg
, &rtm
, clr
.size
, 0);
726 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb_clear_event
, &clr
);
727 nl_cb_set(cb
, NL_CB_FINISH
, NL_CB_CUSTOM
, cb_finish_event
, &pending
);
728 nl_cb_err(cb
, NL_CB_CUSTOM
, error_handler
, &pending
);
730 nl_send_auto_complete(sock_rtnl
, clr
.msg
);
732 nl_recvmsgs(sock_rtnl
, cb
);
740 * Clear bridge (membership) state and bring down device
742 void system_if_clear_state(struct device
*dev
)
744 static char buf
[256];
747 device_set_ifindex(dev
, system_if_resolve(dev
));
748 if (dev
->external
|| !dev
->ifindex
)
751 system_if_flags(dev
->ifname
, 0, IFF_UP
);
753 if (system_is_bridge(dev
->ifname
, buf
, sizeof(buf
))) {
754 D(SYSTEM
, "Delete existing bridge named '%s'\n", dev
->ifname
);
755 system_bridge_delbr(dev
);
759 bridge
= system_get_bridge(dev
->ifname
, buf
, sizeof(buf
));
761 D(SYSTEM
, "Remove device '%s' from bridge '%s'\n", dev
->ifname
, bridge
);
762 system_bridge_if(bridge
, dev
, SIOCBRDELIF
, NULL
);
765 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET
);
766 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET
);
767 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET6
);
768 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET6
);
769 system_set_disable_ipv6(dev
, "0");
772 static inline unsigned long
773 sec_to_jiffies(int val
)
775 return (unsigned long) val
* 100;
778 int system_bridge_addbr(struct device
*bridge
, struct bridge_config
*cfg
)
780 unsigned long args
[4] = {};
782 if (ioctl(sock_ioctl
, SIOCBRADDBR
, bridge
->ifname
) < 0)
785 args
[0] = BRCTL_SET_BRIDGE_STP_STATE
;
786 args
[1] = !!cfg
->stp
;
787 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
789 args
[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY
;
790 args
[1] = sec_to_jiffies(cfg
->forward_delay
);
791 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
793 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
794 bridge
->ifname
, cfg
->igmp_snoop
? "1" : "0");
796 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
797 bridge
->ifname
, cfg
->igmp_snoop
? "1" : "0");
799 args
[0] = BRCTL_SET_BRIDGE_PRIORITY
;
800 args
[1] = cfg
->priority
;
801 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
803 if (cfg
->flags
& BRIDGE_OPT_AGEING_TIME
) {
804 args
[0] = BRCTL_SET_AGEING_TIME
;
805 args
[1] = sec_to_jiffies(cfg
->ageing_time
);
806 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
809 if (cfg
->flags
& BRIDGE_OPT_HELLO_TIME
) {
810 args
[0] = BRCTL_SET_BRIDGE_HELLO_TIME
;
811 args
[1] = sec_to_jiffies(cfg
->hello_time
);
812 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
815 if (cfg
->flags
& BRIDGE_OPT_MAX_AGE
) {
816 args
[0] = BRCTL_SET_BRIDGE_MAX_AGE
;
817 args
[1] = sec_to_jiffies(cfg
->max_age
);
818 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
824 int system_macvlan_add(struct device
*macvlan
, struct device
*dev
, struct macvlan_config
*cfg
)
827 struct nlattr
*linkinfo
, *data
;
828 struct ifinfomsg iim
= { .ifi_family
= AF_UNSPEC
, };
830 static const struct {
832 enum macvlan_mode val
;
834 { "private", MACVLAN_MODE_PRIVATE
},
835 { "vepa", MACVLAN_MODE_VEPA
},
836 { "bridge", MACVLAN_MODE_BRIDGE
},
837 { "passthru", MACVLAN_MODE_PASSTHRU
},
840 msg
= nlmsg_alloc_simple(RTM_NEWLINK
, NLM_F_REQUEST
| NLM_F_CREATE
| NLM_F_EXCL
);
845 nlmsg_append(msg
, &iim
, sizeof(iim
), 0);
847 if (cfg
->flags
& MACVLAN_OPT_MACADDR
)
848 nla_put(msg
, IFLA_ADDRESS
, sizeof(cfg
->macaddr
), cfg
->macaddr
);
849 nla_put_string(msg
, IFLA_IFNAME
, macvlan
->ifname
);
850 nla_put_u32(msg
, IFLA_LINK
, dev
->ifindex
);
852 if (!(linkinfo
= nla_nest_start(msg
, IFLA_LINKINFO
)))
853 goto nla_put_failure
;
855 nla_put_string(msg
, IFLA_INFO_KIND
, "macvlan");
857 if (!(data
= nla_nest_start(msg
, IFLA_INFO_DATA
)))
858 goto nla_put_failure
;
861 for (i
= 0; i
< ARRAY_SIZE(modes
); i
++) {
862 if (strcmp(cfg
->mode
, modes
[i
].name
) != 0)
865 nla_put_u32(msg
, IFLA_MACVLAN_MODE
, modes
[i
].val
);
870 nla_nest_end(msg
, data
);
871 nla_nest_end(msg
, linkinfo
);
873 rv
= system_rtnl_call(msg
);
875 D(SYSTEM
, "Error adding macvlan '%s' over '%s': %d\n", macvlan
->ifname
, dev
->ifname
, rv
);
884 static int system_link_del(const char *ifname
)
887 struct ifinfomsg iim
= {
888 .ifi_family
= AF_UNSPEC
,
892 msg
= nlmsg_alloc_simple(RTM_DELLINK
, NLM_F_REQUEST
);
897 nlmsg_append(msg
, &iim
, sizeof(iim
), 0);
898 nla_put_string(msg
, IFLA_IFNAME
, ifname
);
899 return system_rtnl_call(msg
);
902 int system_macvlan_del(struct device
*macvlan
)
904 return system_link_del(macvlan
->ifname
);
907 static int system_vlan(struct device
*dev
, int id
)
909 struct vlan_ioctl_args ifr
= {
910 .cmd
= SET_VLAN_NAME_TYPE_CMD
,
911 .u
.name_type
= VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD
,
914 ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
917 ifr
.cmd
= DEL_VLAN_CMD
;
920 ifr
.cmd
= ADD_VLAN_CMD
;
923 strncpy(ifr
.device1
, dev
->ifname
, sizeof(ifr
.device1
));
924 return ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
927 int system_vlan_add(struct device
*dev
, int id
)
929 return system_vlan(dev
, id
);
932 int system_vlan_del(struct device
*dev
)
934 return system_vlan(dev
, -1);
937 int system_vlandev_add(struct device
*vlandev
, struct device
*dev
, struct vlandev_config
*cfg
)
940 struct nlattr
*linkinfo
, *data
;
941 struct ifinfomsg iim
= { .ifi_family
= AF_UNSPEC
};
944 msg
= nlmsg_alloc_simple(RTM_NEWLINK
, NLM_F_REQUEST
| NLM_F_CREATE
| NLM_F_EXCL
);
949 nlmsg_append(msg
, &iim
, sizeof(iim
), 0);
950 nla_put_string(msg
, IFLA_IFNAME
, vlandev
->ifname
);
951 nla_put_u32(msg
, IFLA_LINK
, dev
->ifindex
);
953 if (!(linkinfo
= nla_nest_start(msg
, IFLA_LINKINFO
)))
954 goto nla_put_failure
;
956 nla_put_string(msg
, IFLA_INFO_KIND
, "vlan");
958 if (!(data
= nla_nest_start(msg
, IFLA_INFO_DATA
)))
959 goto nla_put_failure
;
961 nla_put_u16(msg
, IFLA_VLAN_ID
, cfg
->vid
);
963 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
964 nla_put_u16(msg
, IFLA_VLAN_PROTOCOL
, htons(cfg
->proto
));
966 if(cfg
->proto
== VLAN_PROTO_8021AD
)
967 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
);
970 nla_nest_end(msg
, data
);
971 nla_nest_end(msg
, linkinfo
);
973 rv
= system_rtnl_call(msg
);
975 D(SYSTEM
, "Error adding vlandev '%s' over '%s': %d\n", vlandev
->ifname
, dev
->ifname
, rv
);
984 int system_vlandev_del(struct device
*vlandev
)
986 return system_link_del(vlandev
->ifname
);
990 system_if_get_settings(struct device
*dev
, struct device_settings
*s
)
995 memset(&ifr
, 0, sizeof(ifr
));
996 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
998 if (ioctl(sock_ioctl
, SIOCGIFMTU
, &ifr
) == 0) {
999 s
->mtu
= ifr
.ifr_mtu
;
1000 s
->flags
|= DEV_OPT_MTU
;
1003 if (ioctl(sock_ioctl
, SIOCGIFTXQLEN
, &ifr
) == 0) {
1004 s
->txqueuelen
= ifr
.ifr_qlen
;
1005 s
->flags
|= DEV_OPT_TXQUEUELEN
;
1008 if (ioctl(sock_ioctl
, SIOCGIFHWADDR
, &ifr
) == 0) {
1009 memcpy(s
->macaddr
, &ifr
.ifr_hwaddr
.sa_data
, sizeof(s
->macaddr
));
1010 s
->flags
|= DEV_OPT_MACADDR
;
1013 if (!system_get_disable_ipv6(dev
, buf
, sizeof(buf
))) {
1014 s
->ipv6
= !strtoul(buf
, NULL
, 0);
1015 s
->flags
|= DEV_OPT_IPV6
;
1018 if (ioctl(sock_ioctl
, SIOCGIFFLAGS
, &ifr
) == 0) {
1019 s
->promisc
= ifr
.ifr_flags
& IFF_PROMISC
;
1020 s
->flags
|= DEV_OPT_PROMISC
;
1023 if (!system_get_rpfilter(dev
, buf
, sizeof(buf
))) {
1024 s
->rpfilter
= strtoul(buf
, NULL
, 0);
1025 s
->flags
|= DEV_OPT_RPFILTER
;
1028 if (!system_get_acceptlocal(dev
, buf
, sizeof(buf
))) {
1029 s
->acceptlocal
= strtoul(buf
, NULL
, 0);
1030 s
->flags
|= DEV_OPT_ACCEPTLOCAL
;
1033 if (!system_get_igmpversion(dev
, buf
, sizeof(buf
))) {
1034 s
->igmpversion
= strtoul(buf
, NULL
, 0);
1035 s
->flags
|= DEV_OPT_IGMPVERSION
;
1038 if (!system_get_mldversion(dev
, buf
, sizeof(buf
))) {
1039 s
->mldversion
= strtoul(buf
, NULL
, 0);
1040 s
->flags
|= DEV_OPT_MLDVERSION
;
1043 if (!system_get_neigh4reachabletime(dev
, buf
, sizeof(buf
))) {
1044 s
->neigh4reachabletime
= strtoul(buf
, NULL
, 0);
1045 s
->flags
|= DEV_OPT_NEIGHREACHABLETIME
;
1048 if (!system_get_neigh6reachabletime(dev
, buf
, sizeof(buf
))) {
1049 s
->neigh6reachabletime
= strtoul(buf
, NULL
, 0);
1050 s
->flags
|= DEV_OPT_NEIGHREACHABLETIME
;
1055 system_if_apply_settings(struct device
*dev
, struct device_settings
*s
, unsigned int apply_mask
)
1062 memset(&ifr
, 0, sizeof(ifr
));
1063 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
1064 if (s
->flags
& DEV_OPT_MTU
& apply_mask
) {
1065 ifr
.ifr_mtu
= s
->mtu
;
1066 if (ioctl(sock_ioctl
, SIOCSIFMTU
, &ifr
) < 0)
1067 s
->flags
&= ~DEV_OPT_MTU
;
1069 if (s
->flags
& DEV_OPT_TXQUEUELEN
& apply_mask
) {
1070 ifr
.ifr_qlen
= s
->txqueuelen
;
1071 if (ioctl(sock_ioctl
, SIOCSIFTXQLEN
, &ifr
) < 0)
1072 s
->flags
&= ~DEV_OPT_TXQUEUELEN
;
1074 if ((s
->flags
& DEV_OPT_MACADDR
& apply_mask
) && !dev
->external
) {
1075 ifr
.ifr_hwaddr
.sa_family
= ARPHRD_ETHER
;
1076 memcpy(&ifr
.ifr_hwaddr
.sa_data
, s
->macaddr
, sizeof(s
->macaddr
));
1077 if (ioctl(sock_ioctl
, SIOCSIFHWADDR
, &ifr
) < 0)
1078 s
->flags
&= ~DEV_OPT_MACADDR
;
1080 if (s
->flags
& DEV_OPT_IPV6
& apply_mask
)
1081 system_set_disable_ipv6(dev
, s
->ipv6
? "0" : "1");
1082 if (s
->flags
& DEV_OPT_PROMISC
& apply_mask
) {
1083 if (system_if_flags(dev
->ifname
, s
->promisc
? IFF_PROMISC
: 0,
1084 !s
->promisc
? IFF_PROMISC
: 0) < 0)
1085 s
->flags
&= ~DEV_OPT_PROMISC
;
1087 if (s
->flags
& DEV_OPT_RPFILTER
& apply_mask
) {
1090 snprintf(buf
, sizeof(buf
), "%d", s
->rpfilter
);
1091 system_set_rpfilter(dev
, buf
);
1093 if (s
->flags
& DEV_OPT_ACCEPTLOCAL
& apply_mask
)
1094 system_set_acceptlocal(dev
, s
->acceptlocal
? "1" : "0");
1095 if (s
->flags
& DEV_OPT_IGMPVERSION
& apply_mask
) {
1098 snprintf(buf
, sizeof(buf
), "%d", s
->igmpversion
);
1099 system_set_igmpversion(dev
, buf
);
1101 if (s
->flags
& DEV_OPT_MLDVERSION
& apply_mask
) {
1104 snprintf(buf
, sizeof(buf
), "%d", s
->mldversion
);
1105 system_set_mldversion(dev
, buf
);
1107 if (s
->flags
& DEV_OPT_NEIGHREACHABLETIME
& apply_mask
) {
1110 snprintf(buf
, sizeof(buf
), "%d", s
->neigh4reachabletime
);
1111 system_set_neigh4reachabletime(dev
, buf
);
1112 snprintf(buf
, sizeof(buf
), "%d", s
->neigh6reachabletime
);
1113 system_set_neigh6reachabletime(dev
, buf
);
1117 int system_if_up(struct device
*dev
)
1119 system_if_get_settings(dev
, &dev
->orig_settings
);
1120 /* Only keep orig settings based on what needs to be set */
1121 dev
->orig_settings
.flags
&= dev
->settings
.flags
;
1122 system_if_apply_settings(dev
, &dev
->settings
, dev
->settings
.flags
);
1123 return system_if_flags(dev
->ifname
, IFF_UP
, 0);
1126 int system_if_down(struct device
*dev
)
1128 int ret
= system_if_flags(dev
->ifname
, 0, IFF_UP
);
1129 system_if_apply_settings(dev
, &dev
->orig_settings
, dev
->orig_settings
.flags
);
1133 struct if_check_data
{
1139 #ifndef IFF_LOWER_UP
1140 #define IFF_LOWER_UP 0x10000
1143 static int cb_if_check_valid(struct nl_msg
*msg
, void *arg
)
1145 struct nlmsghdr
*nh
= nlmsg_hdr(msg
);
1146 struct ifinfomsg
*ifi
= NLMSG_DATA(nh
);
1147 struct if_check_data
*chk
= (struct if_check_data
*)arg
;
1149 if (nh
->nlmsg_type
!= RTM_NEWLINK
)
1152 device_set_present(chk
->dev
, ifi
->ifi_index
> 0 ? true : false);
1153 device_set_link(chk
->dev
, ifi
->ifi_flags
& IFF_LOWER_UP
? true : false);
1158 static int cb_if_check_ack(struct nl_msg
*msg
, void *arg
)
1160 struct if_check_data
*chk
= (struct if_check_data
*)arg
;
1165 static int cb_if_check_error(struct sockaddr_nl
*nla
, struct nlmsgerr
*err
, void *arg
)
1167 struct if_check_data
*chk
= (struct if_check_data
*)arg
;
1169 device_set_present(chk
->dev
, false);
1170 device_set_link(chk
->dev
, false);
1171 chk
->pending
= err
->error
;
1176 int system_if_check(struct device
*dev
)
1178 struct nl_cb
*cb
= nl_cb_alloc(NL_CB_DEFAULT
);
1180 struct ifinfomsg ifi
= {
1181 .ifi_family
= AF_UNSPEC
,
1184 struct if_check_data chk
= {
1190 msg
= nlmsg_alloc_simple(RTM_GETLINK
, 0);
1191 if (!msg
|| nlmsg_append(msg
, &ifi
, sizeof(ifi
), 0) ||
1192 nla_put_string(msg
, IFLA_IFNAME
, dev
->ifname
))
1195 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb_if_check_valid
, &chk
);
1196 nl_cb_set(cb
, NL_CB_ACK
, NL_CB_CUSTOM
, cb_if_check_ack
, &chk
);
1197 nl_cb_err(cb
, NL_CB_CUSTOM
, cb_if_check_error
, &chk
);
1199 nl_send_auto_complete(sock_rtnl
, msg
);
1200 while (chk
.pending
> 0)
1201 nl_recvmsgs(sock_rtnl
, cb
);
1212 system_if_get_parent(struct device
*dev
)
1214 char buf
[64], *devname
;
1215 int ifindex
, iflink
, len
;
1218 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/iflink", dev
->ifname
);
1219 f
= fopen(buf
, "r");
1223 len
= fread(buf
, 1, sizeof(buf
) - 1, f
);
1230 iflink
= strtoul(buf
, NULL
, 0);
1231 ifindex
= system_if_resolve(dev
);
1232 if (!iflink
|| iflink
== ifindex
)
1235 devname
= if_indextoname(iflink
, buf
);
1239 return device_get(devname
, true);
1243 read_string_file(int dir_fd
, const char *file
, char *buf
, int len
)
1249 fd
= openat(dir_fd
, file
, O_RDONLY
);
1254 len
= read(fd
, buf
, len
- 1);
1258 } else if (len
> 0) {
1261 c
= strchr(buf
, '\n');
1274 read_uint64_file(int dir_fd
, const char *file
, uint64_t *val
)
1279 ret
= read_string_file(dir_fd
, file
, buf
, sizeof(buf
));
1281 *val
= strtoull(buf
, NULL
, 0);
1286 /* Assume advertised flags == supported flags */
1287 static const struct {
1290 } ethtool_link_modes
[] = {
1291 { ADVERTISED_10baseT_Half
, "10H" },
1292 { ADVERTISED_10baseT_Full
, "10F" },
1293 { ADVERTISED_100baseT_Half
, "100H" },
1294 { ADVERTISED_100baseT_Full
, "100F" },
1295 { ADVERTISED_1000baseT_Half
, "1000H" },
1296 { ADVERTISED_1000baseT_Full
, "1000F" },
1299 static void system_add_link_modes(struct blob_buf
*b
, __u32 mask
)
1302 for (i
= 0; i
< ARRAY_SIZE(ethtool_link_modes
); i
++) {
1303 if (mask
& ethtool_link_modes
[i
].mask
)
1304 blobmsg_add_string(b
, NULL
, ethtool_link_modes
[i
].name
);
1309 system_if_force_external(const char *ifname
)
1314 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/phy80211", ifname
);
1315 return stat(buf
, &s
) == 0;
1319 system_if_dump_info(struct device
*dev
, struct blob_buf
*b
)
1321 struct ethtool_cmd ecmd
;
1327 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s", dev
->ifname
);
1328 dir_fd
= open(buf
, O_DIRECTORY
);
1330 memset(&ecmd
, 0, sizeof(ecmd
));
1331 memset(&ifr
, 0, sizeof(ifr
));
1332 strcpy(ifr
.ifr_name
, dev
->ifname
);
1333 ifr
.ifr_data
= (caddr_t
) &ecmd
;
1334 ecmd
.cmd
= ETHTOOL_GSET
;
1336 if (ioctl(sock_ioctl
, SIOCETHTOOL
, &ifr
) == 0) {
1337 c
= blobmsg_open_array(b
, "link-advertising");
1338 system_add_link_modes(b
, ecmd
.advertising
);
1339 blobmsg_close_array(b
, c
);
1341 c
= blobmsg_open_array(b
, "link-supported");
1342 system_add_link_modes(b
, ecmd
.supported
);
1343 blobmsg_close_array(b
, c
);
1345 s
= blobmsg_alloc_string_buffer(b
, "speed", 8);
1346 snprintf(s
, 8, "%d%c", ethtool_cmd_speed(&ecmd
),
1347 ecmd
.duplex
== DUPLEX_HALF
? 'H' : 'F');
1348 blobmsg_add_string_buffer(b
);
1356 system_if_dump_stats(struct device
*dev
, struct blob_buf
*b
)
1358 const char *const counters
[] = {
1359 "collisions", "rx_frame_errors", "tx_compressed",
1360 "multicast", "rx_length_errors", "tx_dropped",
1361 "rx_bytes", "rx_missed_errors", "tx_errors",
1362 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1363 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1364 "rx_dropped", "tx_aborted_errors", "tx_packets",
1365 "rx_errors", "tx_bytes", "tx_window_errors",
1366 "rx_fifo_errors", "tx_carrier_errors",
1373 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/statistics", dev
->ifname
);
1374 stats_dir
= open(buf
, O_DIRECTORY
);
1378 for (i
= 0; i
< ARRAY_SIZE(counters
); i
++)
1379 if (read_uint64_file(stats_dir
, counters
[i
], &val
))
1380 blobmsg_add_u64(b
, counters
[i
], val
);
1386 static int system_addr(struct device
*dev
, struct device_addr
*addr
, int cmd
)
1388 bool v4
= ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
);
1389 int alen
= v4
? 4 : 16;
1390 unsigned int flags
= 0;
1391 struct ifaddrmsg ifa
= {
1392 .ifa_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1393 .ifa_prefixlen
= addr
->mask
,
1394 .ifa_index
= dev
->ifindex
,
1398 if (cmd
== RTM_NEWADDR
)
1399 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
1401 msg
= nlmsg_alloc_simple(cmd
, flags
);
1405 nlmsg_append(msg
, &ifa
, sizeof(ifa
), 0);
1406 nla_put(msg
, IFA_LOCAL
, alen
, &addr
->addr
);
1408 if (addr
->broadcast
)
1409 nla_put_u32(msg
, IFA_BROADCAST
, addr
->broadcast
);
1410 if (addr
->point_to_point
)
1411 nla_put_u32(msg
, IFA_ADDRESS
, addr
->point_to_point
);
1413 time_t now
= system_get_rtime();
1414 struct ifa_cacheinfo cinfo
= {0xffffffffU
, 0xffffffffU
, 0, 0};
1416 if (addr
->preferred_until
) {
1417 int64_t preferred
= addr
->preferred_until
- now
;
1420 else if (preferred
> UINT32_MAX
)
1421 preferred
= UINT32_MAX
;
1423 cinfo
.ifa_prefered
= preferred
;
1426 if (addr
->valid_until
) {
1427 int64_t valid
= addr
->valid_until
- now
;
1430 else if (valid
> UINT32_MAX
)
1433 cinfo
.ifa_valid
= valid
;
1436 nla_put(msg
, IFA_CACHEINFO
, sizeof(cinfo
), &cinfo
);
1439 return system_rtnl_call(msg
);
1442 int system_add_address(struct device
*dev
, struct device_addr
*addr
)
1444 return system_addr(dev
, addr
, RTM_NEWADDR
);
1447 int system_del_address(struct device
*dev
, struct device_addr
*addr
)
1449 return system_addr(dev
, addr
, RTM_DELADDR
);
1452 static int system_rt(struct device
*dev
, struct device_route
*route
, int cmd
)
1454 int alen
= ((route
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
) ? 4 : 16;
1456 unsigned int flags
= 0;
1459 have_gw
= !!route
->nexthop
.in
.s_addr
;
1461 have_gw
= route
->nexthop
.in6
.s6_addr32
[0] ||
1462 route
->nexthop
.in6
.s6_addr32
[1] ||
1463 route
->nexthop
.in6
.s6_addr32
[2] ||
1464 route
->nexthop
.in6
.s6_addr32
[3];
1466 unsigned int table
= (route
->flags
& (DEVROUTE_TABLE
| DEVROUTE_SRCTABLE
))
1467 ? route
->table
: RT_TABLE_MAIN
;
1469 struct rtmsg rtm
= {
1470 .rtm_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1471 .rtm_dst_len
= route
->mask
,
1472 .rtm_src_len
= route
->sourcemask
,
1473 .rtm_table
= (table
< 256) ? table
: RT_TABLE_UNSPEC
,
1474 .rtm_protocol
= (route
->flags
& DEVADDR_KERNEL
) ? RTPROT_KERNEL
: RTPROT_STATIC
,
1475 .rtm_scope
= RT_SCOPE_NOWHERE
,
1476 .rtm_type
= (cmd
== RTM_DELROUTE
) ? 0: RTN_UNICAST
,
1477 .rtm_flags
= (route
->flags
& DEVROUTE_ONLINK
) ? RTNH_F_ONLINK
: 0,
1481 if (cmd
== RTM_NEWROUTE
) {
1482 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
1484 if (!dev
) { // Add null-route
1485 rtm
.rtm_scope
= RT_SCOPE_UNIVERSE
;
1486 rtm
.rtm_type
= RTN_UNREACHABLE
;
1489 rtm
.rtm_scope
= (have_gw
) ? RT_SCOPE_UNIVERSE
: RT_SCOPE_LINK
;
1492 if (route
->flags
& DEVROUTE_TYPE
) {
1493 rtm
.rtm_type
= route
->type
;
1494 if (!(route
->flags
& (DEVROUTE_TABLE
| DEVROUTE_SRCTABLE
))) {
1495 if (rtm
.rtm_type
== RTN_LOCAL
|| rtm
.rtm_type
== RTN_BROADCAST
||
1496 rtm
.rtm_type
== RTN_NAT
|| rtm
.rtm_type
== RTN_ANYCAST
)
1497 rtm
.rtm_table
= RT_TABLE_LOCAL
;
1500 if (rtm
.rtm_type
== RTN_LOCAL
|| rtm
.rtm_type
== RTN_NAT
) {
1501 rtm
.rtm_scope
= RT_SCOPE_HOST
;
1502 } else if (rtm
.rtm_type
== RTN_BROADCAST
|| rtm
.rtm_type
== RTN_MULTICAST
||
1503 rtm
.rtm_type
== RTN_ANYCAST
) {
1504 rtm
.rtm_scope
= RT_SCOPE_LINK
;
1505 } else if (rtm
.rtm_type
== RTN_BLACKHOLE
|| rtm
.rtm_type
== RTN_UNREACHABLE
||
1506 rtm
.rtm_type
== RTN_PROHIBIT
|| rtm
.rtm_type
== RTN_FAILED_POLICY
) {
1507 rtm
.rtm_scope
= RT_SCOPE_UNIVERSE
;
1512 msg
= nlmsg_alloc_simple(cmd
, flags
);
1516 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
1519 nla_put(msg
, RTA_DST
, alen
, &route
->addr
);
1521 if (route
->sourcemask
) {
1522 if (rtm
.rtm_family
== AF_INET
)
1523 nla_put(msg
, RTA_PREFSRC
, alen
, &route
->source
);
1525 nla_put(msg
, RTA_SRC
, alen
, &route
->source
);
1528 if (route
->metric
> 0)
1529 nla_put_u32(msg
, RTA_PRIORITY
, route
->metric
);
1532 nla_put(msg
, RTA_GATEWAY
, alen
, &route
->nexthop
);
1535 nla_put_u32(msg
, RTA_OIF
, dev
->ifindex
);
1538 nla_put_u32(msg
, RTA_TABLE
, table
);
1540 if (route
->flags
& DEVROUTE_MTU
) {
1541 struct nlattr
*metrics
;
1543 if (!(metrics
= nla_nest_start(msg
, RTA_METRICS
)))
1544 goto nla_put_failure
;
1546 nla_put_u32(msg
, RTAX_MTU
, route
->mtu
);
1548 nla_nest_end(msg
, metrics
);
1551 return system_rtnl_call(msg
);
1558 int system_add_route(struct device
*dev
, struct device_route
*route
)
1560 return system_rt(dev
, route
, RTM_NEWROUTE
);
1563 int system_del_route(struct device
*dev
, struct device_route
*route
)
1565 return system_rt(dev
, route
, RTM_DELROUTE
);
1568 int system_flush_routes(void)
1570 const char *names
[] = {
1571 "/proc/sys/net/ipv4/route/flush",
1572 "/proc/sys/net/ipv6/route/flush"
1576 for (i
= 0; i
< ARRAY_SIZE(names
); i
++) {
1577 fd
= open(names
[i
], O_WRONLY
);
1581 if (write(fd
, "-1", 2)) {}
1587 bool system_resolve_rt_type(const char *type
, unsigned int *id
)
1589 return system_rtn_aton(type
, id
);
1592 bool system_resolve_rt_table(const char *name
, unsigned int *id
)
1596 unsigned int n
, table
= RT_TABLE_UNSPEC
;
1598 /* first try to parse table as number */
1599 if ((n
= strtoul(name
, &e
, 0)) > 0 && !*e
)
1602 /* handle well known aliases */
1603 else if (!strcmp(name
, "default"))
1604 table
= RT_TABLE_DEFAULT
;
1605 else if (!strcmp(name
, "main"))
1606 table
= RT_TABLE_MAIN
;
1607 else if (!strcmp(name
, "local"))
1608 table
= RT_TABLE_LOCAL
;
1610 /* try to look up name in /etc/iproute2/rt_tables */
1611 else if ((f
= fopen("/etc/iproute2/rt_tables", "r")) != NULL
)
1613 while (fgets(buf
, sizeof(buf
) - 1, f
) != NULL
)
1615 if ((e
= strtok(buf
, " \t\n")) == NULL
|| *e
== '#')
1618 n
= strtoul(e
, NULL
, 10);
1619 e
= strtok(NULL
, " \t\n");
1621 if (e
&& !strcmp(e
, name
))
1631 if (table
== RT_TABLE_UNSPEC
)
1638 bool system_is_default_rt_table(unsigned int id
)
1640 return (id
== RT_TABLE_MAIN
);
1643 bool system_resolve_rpfilter(const char *filter
, unsigned int *id
)
1648 if (!strcmp(filter
, "strict"))
1650 else if (!strcmp(filter
, "loose"))
1653 n
= strtoul(filter
, &e
, 0);
1654 if (*e
|| e
== filter
|| n
> 2)
1662 static int system_iprule(struct iprule
*rule
, int cmd
)
1664 int alen
= ((rule
->flags
& IPRULE_FAMILY
) == IPRULE_INET4
) ? 4 : 16;
1667 struct rtmsg rtm
= {
1668 .rtm_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1669 .rtm_protocol
= RTPROT_STATIC
,
1670 .rtm_scope
= RT_SCOPE_UNIVERSE
,
1671 .rtm_table
= RT_TABLE_UNSPEC
,
1672 .rtm_type
= RTN_UNSPEC
,
1676 if (cmd
== RTM_NEWRULE
) {
1677 rtm
.rtm_type
= RTN_UNICAST
;
1678 rtm
.rtm_flags
|= NLM_F_REPLACE
| NLM_F_EXCL
;
1682 rtm
.rtm_flags
|= FIB_RULE_INVERT
;
1684 if (rule
->flags
& IPRULE_SRC
)
1685 rtm
.rtm_src_len
= rule
->src_mask
;
1687 if (rule
->flags
& IPRULE_DEST
)
1688 rtm
.rtm_dst_len
= rule
->dest_mask
;
1690 if (rule
->flags
& IPRULE_TOS
)
1691 rtm
.rtm_tos
= rule
->tos
;
1693 if (rule
->flags
& IPRULE_LOOKUP
) {
1694 if (rule
->lookup
< 256)
1695 rtm
.rtm_table
= rule
->lookup
;
1698 if (rule
->flags
& IPRULE_ACTION
)
1699 rtm
.rtm_type
= rule
->action
;
1700 else if (rule
->flags
& IPRULE_GOTO
)
1701 rtm
.rtm_type
= FR_ACT_GOTO
;
1702 else if (!(rule
->flags
& (IPRULE_LOOKUP
| IPRULE_ACTION
| IPRULE_GOTO
)))
1703 rtm
.rtm_type
= FR_ACT_NOP
;
1705 msg
= nlmsg_alloc_simple(cmd
, NLM_F_REQUEST
);
1710 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
1712 if (rule
->flags
& IPRULE_IN
)
1713 nla_put(msg
, FRA_IFNAME
, strlen(rule
->in_dev
) + 1, rule
->in_dev
);
1715 if (rule
->flags
& IPRULE_OUT
)
1716 nla_put(msg
, FRA_OIFNAME
, strlen(rule
->out_dev
) + 1, rule
->out_dev
);
1718 if (rule
->flags
& IPRULE_SRC
)
1719 nla_put(msg
, FRA_SRC
, alen
, &rule
->src_addr
);
1721 if (rule
->flags
& IPRULE_DEST
)
1722 nla_put(msg
, FRA_DST
, alen
, &rule
->dest_addr
);
1724 if (rule
->flags
& IPRULE_PRIORITY
)
1725 nla_put_u32(msg
, FRA_PRIORITY
, rule
->priority
);
1726 else if (cmd
== RTM_NEWRULE
)
1727 nla_put_u32(msg
, FRA_PRIORITY
, rule
->order
);
1729 if (rule
->flags
& IPRULE_FWMARK
)
1730 nla_put_u32(msg
, FRA_FWMARK
, rule
->fwmark
);
1732 if (rule
->flags
& IPRULE_FWMASK
)
1733 nla_put_u32(msg
, FRA_FWMASK
, rule
->fwmask
);
1735 if (rule
->flags
& IPRULE_LOOKUP
) {
1736 if (rule
->lookup
>= 256)
1737 nla_put_u32(msg
, FRA_TABLE
, rule
->lookup
);
1740 if (rule
->flags
& IPRULE_GOTO
)
1741 nla_put_u32(msg
, FRA_GOTO
, rule
->gotoid
);
1743 return system_rtnl_call(msg
);
1746 int system_add_iprule(struct iprule
*rule
)
1748 return system_iprule(rule
, RTM_NEWRULE
);
1751 int system_del_iprule(struct iprule
*rule
)
1753 return system_iprule(rule
, RTM_DELRULE
);
1756 int system_flush_iprules(void)
1761 system_if_clear_entries(NULL
, RTM_GETRULE
, AF_INET
);
1762 system_if_clear_entries(NULL
, RTM_GETRULE
, AF_INET6
);
1764 memset(&rule
, 0, sizeof(rule
));
1767 rule
.flags
= IPRULE_INET4
| IPRULE_PRIORITY
| IPRULE_LOOKUP
;
1770 rule
.lookup
= RT_TABLE_LOCAL
;
1771 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1773 rule
.priority
= 32766;
1774 rule
.lookup
= RT_TABLE_MAIN
;
1775 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1777 rule
.priority
= 32767;
1778 rule
.lookup
= RT_TABLE_DEFAULT
;
1779 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1782 rule
.flags
= IPRULE_INET6
| IPRULE_PRIORITY
| IPRULE_LOOKUP
;
1785 rule
.lookup
= RT_TABLE_LOCAL
;
1786 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1788 rule
.priority
= 32766;
1789 rule
.lookup
= RT_TABLE_MAIN
;
1790 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1795 bool system_resolve_iprule_action(const char *action
, unsigned int *id
)
1797 return system_rtn_aton(action
, id
);
1800 time_t system_get_rtime(void)
1805 if (syscall(__NR_clock_gettime
, CLOCK_MONOTONIC
, &ts
) == 0)
1808 if (gettimeofday(&tv
, NULL
) == 0)
1815 #define IP_DF 0x4000
1818 static int tunnel_ioctl(const char *name
, int cmd
, void *p
)
1822 memset(&ifr
, 0, sizeof(ifr
));
1823 strncpy(ifr
.ifr_name
, name
, sizeof(ifr
.ifr_name
));
1824 ifr
.ifr_ifru
.ifru_data
= p
;
1825 return ioctl(sock_ioctl
, cmd
, &ifr
);
1828 #ifdef IFLA_IPTUN_MAX
1829 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
1830 static int system_add_gre_tunnel(const char *name
, const char *kind
,
1831 const unsigned int link
, struct blob_attr
**tb
, bool v6
)
1834 struct ifinfomsg ifi
= { .ifi_family
= AF_UNSPEC
, };
1835 struct blob_attr
*cur
;
1836 uint32_t ikey
= 0, okey
= 0, flags
= 0, flowinfo
= 0;
1837 uint16_t iflags
= 0, oflags
= 0;
1839 int ret
= 0, ttl
= 64;
1841 nlm
= nlmsg_alloc_simple(RTM_NEWLINK
, NLM_F_REQUEST
| NLM_F_REPLACE
| NLM_F_CREATE
);
1845 nlmsg_append(nlm
, &ifi
, sizeof(ifi
), 0);
1846 nla_put_string(nlm
, IFLA_IFNAME
, name
);
1848 struct nlattr
*linkinfo
= nla_nest_start(nlm
, IFLA_LINKINFO
);
1854 nla_put_string(nlm
, IFLA_INFO_KIND
, kind
);
1855 struct nlattr
*infodata
= nla_nest_start(nlm
, IFLA_INFO_DATA
);
1862 nla_put_u32(nlm
, IFLA_GRE_LINK
, link
);
1864 if ((cur
= tb
[TUNNEL_ATTR_TTL
]))
1865 ttl
= blobmsg_get_u32(cur
);
1867 nla_put_u8(nlm
, IFLA_GRE_TTL
, ttl
);
1869 if ((cur
= tb
[TUNNEL_ATTR_TOS
])) {
1870 char *str
= blobmsg_get_string(cur
);
1871 if (strcmp(str
, "inherit")) {
1874 if (!system_tos_aton(str
, &uval
)) {
1880 flowinfo
|= htonl(uval
<< 20) & IP6_FLOWINFO_TCLASS
;
1885 flags
|= IP6_TNL_F_USE_ORIG_TCLASS
;
1891 if ((cur
= tb
[TUNNEL_ATTR_INFO
]) && (blobmsg_type(cur
) == BLOBMSG_TYPE_STRING
)) {
1892 uint8_t icsum
, ocsum
, iseqno
, oseqno
;
1893 if (sscanf(blobmsg_get_string(cur
), "%u,%u,%hhu,%hhu,%hhu,%hhu",
1894 &ikey
, &okey
, &icsum
, &ocsum
, &iseqno
, &oseqno
) < 6) {
1919 struct in6_addr in6buf
;
1920 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
])) {
1921 if (inet_pton(AF_INET6
, blobmsg_data(cur
), &in6buf
) < 1) {
1925 nla_put(nlm
, IFLA_GRE_LOCAL
, sizeof(in6buf
), &in6buf
);
1928 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
])) {
1929 if (inet_pton(AF_INET6
, blobmsg_data(cur
), &in6buf
) < 1) {
1933 nla_put(nlm
, IFLA_GRE_REMOTE
, sizeof(in6buf
), &in6buf
);
1935 nla_put_u8(nlm
, IFLA_GRE_ENCAP_LIMIT
, 4);
1938 nla_put_u32(nlm
, IFLA_GRE_FLOWINFO
, flowinfo
);
1941 nla_put_u32(nlm
, IFLA_GRE_FLAGS
, flags
);
1943 struct in_addr inbuf
;
1946 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
])) {
1947 if (inet_pton(AF_INET
, blobmsg_data(cur
), &inbuf
) < 1) {
1951 nla_put(nlm
, IFLA_GRE_LOCAL
, sizeof(inbuf
), &inbuf
);
1954 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
])) {
1955 if (inet_pton(AF_INET
, blobmsg_data(cur
), &inbuf
) < 1) {
1959 nla_put(nlm
, IFLA_GRE_REMOTE
, sizeof(inbuf
), &inbuf
);
1961 if (IN_MULTICAST(ntohl(inbuf
.s_addr
))) {
1963 okey
= inbuf
.s_addr
;
1968 ikey
= inbuf
.s_addr
;
1974 if ((cur
= tb
[TUNNEL_ATTR_DF
]))
1975 set_df
= blobmsg_get_bool(cur
);
1977 /* ttl !=0 and nopmtudisc are incompatible */
1978 if (ttl
&& !set_df
) {
1983 nla_put_u8(nlm
, IFLA_GRE_PMTUDISC
, set_df
? 1 : 0);
1985 nla_put_u8(nlm
, IFLA_GRE_TOS
, tos
);
1989 nla_put_u16(nlm
, IFLA_GRE_OFLAGS
, oflags
);
1992 nla_put_u16(nlm
, IFLA_GRE_IFLAGS
, iflags
);
1995 nla_put_u32(nlm
, IFLA_GRE_OKEY
, okey
);
1998 nla_put_u32(nlm
, IFLA_GRE_IKEY
, ikey
);
2000 nla_nest_end(nlm
, infodata
);
2001 nla_nest_end(nlm
, linkinfo
);
2003 return system_rtnl_call(nlm
);
2011 static int system_add_proto_tunnel(const char *name
, const uint8_t proto
, const unsigned int link
, struct blob_attr
**tb
)
2013 struct blob_attr
*cur
;
2015 struct ip_tunnel_parm p
= {
2024 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
]) &&
2025 inet_pton(AF_INET
, blobmsg_data(cur
), &p
.iph
.saddr
) < 1)
2028 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
]) &&
2029 inet_pton(AF_INET
, blobmsg_data(cur
), &p
.iph
.daddr
) < 1)
2032 if ((cur
= tb
[TUNNEL_ATTR_DF
]))
2033 set_df
= blobmsg_get_bool(cur
);
2035 if ((cur
= tb
[TUNNEL_ATTR_TTL
]))
2036 p
.iph
.ttl
= blobmsg_get_u32(cur
);
2038 if ((cur
= tb
[TUNNEL_ATTR_TOS
])) {
2039 char *str
= blobmsg_get_string(cur
);
2040 if (strcmp(str
, "inherit")) {
2043 if (!system_tos_aton(str
, &uval
))
2051 p
.iph
.frag_off
= set_df
? htons(IP_DF
) : 0;
2052 /* ttl !=0 and nopmtudisc are incompatible */
2053 if (p
.iph
.ttl
&& p
.iph
.frag_off
== 0)
2056 strncpy(p
.name
, name
, sizeof(p
.name
));
2058 switch (p
.iph
.protocol
) {
2060 return tunnel_ioctl("tunl0", SIOCADDTUNNEL
, &p
);
2062 return tunnel_ioctl("sit0", SIOCADDTUNNEL
, &p
);
2069 static int __system_del_ip_tunnel(const char *name
, struct blob_attr
**tb
)
2071 struct blob_attr
*cur
;
2074 if (!(cur
= tb
[TUNNEL_ATTR_TYPE
]))
2076 str
= blobmsg_data(cur
);
2078 if (!strcmp(str
, "greip") || !strcmp(str
, "gretapip") ||
2079 !strcmp(str
, "greip6") || !strcmp(str
, "gretapip6"))
2080 return system_link_del(name
);
2082 return tunnel_ioctl(name
, SIOCDELTUNNEL
, NULL
);
2085 int system_del_ip_tunnel(const char *name
, struct blob_attr
*attr
)
2087 struct blob_attr
*tb
[__TUNNEL_ATTR_MAX
];
2089 blobmsg_parse(tunnel_attr_list
.params
, __TUNNEL_ATTR_MAX
, tb
,
2090 blob_data(attr
), blob_len(attr
));
2092 return __system_del_ip_tunnel(name
, tb
);
2095 int system_update_ipv6_mtu(struct device
*dev
, int mtu
)
2099 snprintf(buf
, sizeof(buf
), "/proc/sys/net/ipv6/conf/%s/mtu",
2102 int fd
= open(buf
, O_RDWR
);
2103 ssize_t len
= read(fd
, buf
, sizeof(buf
) - 1);
2110 if (!mtu
|| ret
<= mtu
)
2113 lseek(fd
, 0, SEEK_SET
);
2114 if (write(fd
, buf
, snprintf(buf
, sizeof(buf
), "%i", mtu
)) <= 0)
2122 int system_add_ip_tunnel(const char *name
, struct blob_attr
*attr
)
2124 struct blob_attr
*tb
[__TUNNEL_ATTR_MAX
];
2125 struct blob_attr
*cur
;
2128 blobmsg_parse(tunnel_attr_list
.params
, __TUNNEL_ATTR_MAX
, tb
,
2129 blob_data(attr
), blob_len(attr
));
2131 __system_del_ip_tunnel(name
, tb
);
2133 if (!(cur
= tb
[TUNNEL_ATTR_TYPE
]))
2135 str
= blobmsg_data(cur
);
2137 unsigned int ttl
= 0;
2138 if ((cur
= tb
[TUNNEL_ATTR_TTL
])) {
2139 ttl
= blobmsg_get_u32(cur
);
2144 unsigned int link
= 0;
2145 if ((cur
= tb
[TUNNEL_ATTR_LINK
])) {
2146 struct interface
*iface
= vlist_find(&interfaces
, blobmsg_data(cur
), iface
, node
);
2150 if (iface
->l3_dev
.dev
)
2151 link
= iface
->l3_dev
.dev
->ifindex
;
2154 if (!strcmp(str
, "sit")) {
2155 if (system_add_proto_tunnel(name
, IPPROTO_IPV6
, link
, tb
) < 0)
2159 if ((cur
= tb
[TUNNEL_ATTR_6RD_PREFIX
])) {
2161 struct ip_tunnel_6rd p6
;
2163 memset(&p6
, 0, sizeof(p6
));
2165 if (!parse_ip_and_netmask(AF_INET6
, blobmsg_data(cur
),
2166 &p6
.prefix
, &mask
) || mask
> 128)
2168 p6
.prefixlen
= mask
;
2170 if ((cur
= tb
[TUNNEL_ATTR_6RD_RELAY_PREFIX
])) {
2171 if (!parse_ip_and_netmask(AF_INET
, blobmsg_data(cur
),
2172 &p6
.relay_prefix
, &mask
) || mask
> 32)
2174 p6
.relay_prefixlen
= mask
;
2177 if (tunnel_ioctl(name
, SIOCADD6RD
, &p6
) < 0) {
2178 __system_del_ip_tunnel(name
, tb
);
2183 #ifdef IFLA_IPTUN_MAX
2184 } else if (!strcmp(str
, "ipip6")) {
2185 struct nl_msg
*nlm
= nlmsg_alloc_simple(RTM_NEWLINK
,
2186 NLM_F_REQUEST
| NLM_F_REPLACE
| NLM_F_CREATE
);
2187 struct ifinfomsg ifi
= { .ifi_family
= AF_UNSPEC
};
2193 nlmsg_append(nlm
, &ifi
, sizeof(ifi
), 0);
2194 nla_put_string(nlm
, IFLA_IFNAME
, name
);
2197 nla_put_u32(nlm
, IFLA_LINK
, link
);
2199 struct nlattr
*linkinfo
= nla_nest_start(nlm
, IFLA_LINKINFO
);
2204 nla_put_string(nlm
, IFLA_INFO_KIND
, "ip6tnl");
2205 struct nlattr
*infodata
= nla_nest_start(nlm
, IFLA_INFO_DATA
);
2212 nla_put_u32(nlm
, IFLA_IPTUN_LINK
, link
);
2214 nla_put_u8(nlm
, IFLA_IPTUN_PROTO
, IPPROTO_IPIP
);
2215 nla_put_u8(nlm
, IFLA_IPTUN_TTL
, (ttl
) ? ttl
: 64);
2216 nla_put_u8(nlm
, IFLA_IPTUN_ENCAP_LIMIT
, 4);
2218 struct in6_addr in6buf
;
2219 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
])) {
2220 if (inet_pton(AF_INET6
, blobmsg_data(cur
), &in6buf
) < 1) {
2224 nla_put(nlm
, IFLA_IPTUN_LOCAL
, sizeof(in6buf
), &in6buf
);
2227 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
])) {
2228 if (inet_pton(AF_INET6
, blobmsg_data(cur
), &in6buf
) < 1) {
2232 nla_put(nlm
, IFLA_IPTUN_REMOTE
, sizeof(in6buf
), &in6buf
);
2235 #ifdef IFLA_IPTUN_FMR_MAX
2236 if ((cur
= tb
[TUNNEL_ATTR_FMRS
])) {
2237 struct nlattr
*fmrs
= nla_nest_start(nlm
, IFLA_IPTUN_FMRS
);
2239 struct blob_attr
*fmr
;
2240 unsigned rem
, fmrcnt
= 0;
2241 blobmsg_for_each_attr(fmr
, cur
, rem
) {
2242 if (blobmsg_type(fmr
) != BLOBMSG_TYPE_STRING
)
2245 unsigned ip4len
, ip6len
, ealen
, offset
= 6;
2249 if (sscanf(blobmsg_get_string(fmr
), "%47[^/]/%u,%15[^/]/%u,%u,%u",
2250 ip6buf
, &ip6len
, ip4buf
, &ip4len
, &ealen
, &offset
) < 5) {
2255 struct in6_addr ip6prefix
;
2256 struct in_addr ip4prefix
;
2257 if (inet_pton(AF_INET6
, ip6buf
, &ip6prefix
) != 1 ||
2258 inet_pton(AF_INET
, ip4buf
, &ip4prefix
) != 1) {
2263 struct nlattr
*rule
= nla_nest_start(nlm
, ++fmrcnt
);
2265 nla_put(nlm
, IFLA_IPTUN_FMR_IP6_PREFIX
, sizeof(ip6prefix
), &ip6prefix
);
2266 nla_put(nlm
, IFLA_IPTUN_FMR_IP4_PREFIX
, sizeof(ip4prefix
), &ip4prefix
);
2267 nla_put_u8(nlm
, IFLA_IPTUN_FMR_IP6_PREFIX_LEN
, ip6len
);
2268 nla_put_u8(nlm
, IFLA_IPTUN_FMR_IP4_PREFIX_LEN
, ip4len
);
2269 nla_put_u8(nlm
, IFLA_IPTUN_FMR_EA_LEN
, ealen
);
2270 nla_put_u8(nlm
, IFLA_IPTUN_FMR_OFFSET
, offset
);
2272 nla_nest_end(nlm
, rule
);
2275 nla_nest_end(nlm
, fmrs
);
2279 nla_nest_end(nlm
, infodata
);
2280 nla_nest_end(nlm
, linkinfo
);
2282 return system_rtnl_call(nlm
);
2286 } else if (!strcmp(str
, "greip")) {
2287 return system_add_gre_tunnel(name
, "gre", link
, tb
, false);
2288 } else if (!strcmp(str
, "gretapip")) {
2289 return system_add_gre_tunnel(name
, "gretap", link
, tb
, false);
2290 } else if (!strcmp(str
, "greip6")) {
2291 return system_add_gre_tunnel(name
, "ip6gre", link
, tb
, true);
2292 } else if (!strcmp(str
, "gretapip6")) {
2293 return system_add_gre_tunnel(name
, "ip6gretap", link
, tb
, true);
2295 } else if (!strcmp(str
, "ipip")) {
2296 return system_add_proto_tunnel(name
, IPPROTO_IPIP
, link
, tb
);