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))
167 int system_init(void)
169 static struct event_socket rtnl_event
;
170 static struct event_socket hotplug_event
;
172 sock_ioctl
= socket(AF_LOCAL
, SOCK_DGRAM
, 0);
173 system_fd_set_cloexec(sock_ioctl
);
175 // Prepare socket for routing / address control
176 sock_rtnl
= create_socket(NETLINK_ROUTE
, 0);
180 if (!create_event_socket(&rtnl_event
, NETLINK_ROUTE
, cb_rtnl_event
))
183 if (!create_raw_event_socket(&hotplug_event
, NETLINK_KOBJECT_UEVENT
, 1,
184 handle_hotplug_event
, 0))
187 // Receive network link events form kernel
188 nl_socket_add_membership(rtnl_event
.sock
, RTNLGRP_LINK
);
193 static void system_set_sysctl(const char *path
, const char *val
)
197 fd
= open(path
, O_WRONLY
);
201 if (write(fd
, val
, strlen(val
))) {}
205 static void system_set_dev_sysctl(const char *path
, const char *device
, const char *val
)
207 snprintf(dev_buf
, sizeof(dev_buf
), path
, device
);
208 system_set_sysctl(dev_buf
, val
);
211 static void system_set_disable_ipv6(struct device
*dev
, const char *val
)
213 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev
->ifname
, val
);
216 static int system_get_sysctl(const char *path
, char *buf
, const size_t buf_sz
)
218 int fd
= -1, ret
= -1;
220 fd
= open(path
, O_RDONLY
);
224 ssize_t len
= read(fd
, buf
, buf_sz
- 1);
238 system_get_dev_sysctl(const char *path
, const char *device
, char *buf
, const size_t buf_sz
)
240 snprintf(dev_buf
, sizeof(dev_buf
), path
, device
);
241 return system_get_sysctl(dev_buf
, buf
, buf_sz
);
244 static int system_get_disable_ipv6(struct device
*dev
, char *buf
, const size_t buf_sz
)
246 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
247 dev
->ifname
, buf
, buf_sz
);
251 #define IFF_LOWER_UP 0x10000
254 // Evaluate netlink messages
255 static int cb_rtnl_event(struct nl_msg
*msg
, void *arg
)
257 struct nlmsghdr
*nh
= nlmsg_hdr(msg
);
258 struct ifinfomsg
*ifi
= NLMSG_DATA(nh
);
259 struct nlattr
*nla
[__IFLA_MAX
];
261 if (nh
->nlmsg_type
!= RTM_NEWLINK
)
264 nlmsg_parse(nh
, sizeof(*ifi
), nla
, __IFLA_MAX
- 1, NULL
);
265 if (!nla
[IFLA_IFNAME
])
268 struct device
*dev
= device_get(nla_data(nla
[IFLA_IFNAME
]), false);
272 device_set_ifindex(dev
, ifi
->ifi_index
);
273 device_set_link(dev
, ifi
->ifi_flags
& IFF_LOWER_UP
? true : false);
280 handle_hotplug_msg(char *data
, int size
)
282 const char *subsystem
= NULL
, *interface
= NULL
;
283 char *cur
, *end
, *sep
;
288 if (!strncmp(data
, "add@", 4))
290 else if (!strncmp(data
, "remove@", 7))
295 skip
= strlen(data
) + 1;
298 for (cur
= data
+ skip
; cur
< end
; cur
+= skip
) {
299 skip
= strlen(cur
) + 1;
301 sep
= strchr(cur
, '=');
306 if (!strcmp(cur
, "INTERFACE"))
308 else if (!strcmp(cur
, "SUBSYSTEM")) {
310 if (strcmp(subsystem
, "net") != 0)
313 if (subsystem
&& interface
)
319 dev
= device_get(interface
, false);
323 if (dev
->type
!= &simple_device_type
)
326 if (add
&& system_if_force_external(dev
->ifname
))
329 device_set_present(dev
, add
);
333 handle_hotplug_event(struct uloop_fd
*u
, unsigned int events
)
335 struct event_socket
*ev
= container_of(u
, struct event_socket
, uloop
);
336 struct sockaddr_nl nla
;
337 unsigned char *buf
= NULL
;
340 while ((size
= nl_recv(ev
->sock
, &nla
, &buf
, NULL
)) > 0) {
342 handle_hotplug_msg((char *) buf
, size
);
348 static int system_rtnl_call(struct nl_msg
*msg
)
352 ret
= nl_send_auto_complete(sock_rtnl
, msg
);
358 return nl_wait_for_ack(sock_rtnl
);
361 int system_bridge_delbr(struct device
*bridge
)
363 return ioctl(sock_ioctl
, SIOCBRDELBR
, bridge
->ifname
);
366 static int system_bridge_if(const char *bridge
, struct device
*dev
, int cmd
, void *data
)
370 memset(&ifr
, 0, sizeof(ifr
));
372 ifr
.ifr_ifindex
= dev
->ifindex
;
375 strncpy(ifr
.ifr_name
, bridge
, sizeof(ifr
.ifr_name
));
376 return ioctl(sock_ioctl
, cmd
, &ifr
);
379 static bool system_is_bridge(const char *name
, char *buf
, int buflen
)
383 snprintf(buf
, buflen
, "/sys/devices/virtual/net/%s/bridge", name
);
384 if (stat(buf
, &st
) < 0)
390 static char *system_get_bridge(const char *name
, char *buf
, int buflen
)
396 snprintf(buf
, buflen
, "/sys/devices/virtual/net/*/brif/%s/bridge", name
);
397 if (glob(buf
, GLOB_NOSORT
, NULL
, &gl
) < 0)
400 if (gl
.gl_pathc
== 0)
403 len
= readlink(gl
.gl_pathv
[0], buf
, buflen
);
408 path
= strrchr(buf
, '/');
415 int system_bridge_addif(struct device
*bridge
, struct device
*dev
)
419 oldbr
= system_get_bridge(dev
->ifname
, dev_buf
, sizeof(dev_buf
));
420 if (oldbr
&& !strcmp(oldbr
, bridge
->ifname
))
423 return system_bridge_if(bridge
->ifname
, dev
, SIOCBRADDIF
, NULL
);
426 int system_bridge_delif(struct device
*bridge
, struct device
*dev
)
428 return system_bridge_if(bridge
->ifname
, dev
, SIOCBRDELIF
, NULL
);
431 static int system_if_resolve(struct device
*dev
)
434 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
435 if (!ioctl(sock_ioctl
, SIOCGIFINDEX
, &ifr
))
436 return ifr
.ifr_ifindex
;
441 static int system_if_flags(const char *ifname
, unsigned add
, unsigned rem
)
445 memset(&ifr
, 0, sizeof(ifr
));
446 strncpy(ifr
.ifr_name
, ifname
, sizeof(ifr
.ifr_name
));
447 ioctl(sock_ioctl
, SIOCGIFFLAGS
, &ifr
);
448 ifr
.ifr_flags
|= add
;
449 ifr
.ifr_flags
&= ~rem
;
450 return ioctl(sock_ioctl
, SIOCSIFFLAGS
, &ifr
);
462 static bool check_ifaddr(struct nlmsghdr
*hdr
, int ifindex
)
464 struct ifaddrmsg
*ifa
= NLMSG_DATA(hdr
);
466 return ifa
->ifa_index
== ifindex
;
469 static bool check_route(struct nlmsghdr
*hdr
, int ifindex
)
471 struct rtmsg
*r
= NLMSG_DATA(hdr
);
472 struct nlattr
*tb
[__RTA_MAX
];
474 if (r
->rtm_protocol
== RTPROT_KERNEL
&&
475 r
->rtm_family
== AF_INET6
)
478 nlmsg_parse(hdr
, sizeof(struct rtmsg
), tb
, __RTA_MAX
- 1, NULL
);
482 return *(int *)RTA_DATA(tb
[RTA_OIF
]) == ifindex
;
485 static bool check_rule(struct nlmsghdr
*hdr
, int ifindex
)
490 static int cb_clear_event(struct nl_msg
*msg
, void *arg
)
492 struct clear_data
*clr
= arg
;
493 struct nlmsghdr
*hdr
= nlmsg_hdr(msg
);
494 bool (*cb
)(struct nlmsghdr
*, int ifindex
);
500 if (hdr
->nlmsg_type
!= RTM_NEWADDR
)
507 if (hdr
->nlmsg_type
!= RTM_NEWROUTE
)
514 if (hdr
->nlmsg_type
!= RTM_NEWRULE
)
523 if (!cb(hdr
, clr
->dev
? clr
->dev
->ifindex
: 0))
526 if (type
== RTM_DELRULE
)
527 D(SYSTEM
, "Remove a rule\n");
529 D(SYSTEM
, "Remove %s from device %s\n",
530 type
== RTM_DELADDR
? "an address" : "a route",
532 memcpy(nlmsg_hdr(clr
->msg
), hdr
, hdr
->nlmsg_len
);
533 hdr
= nlmsg_hdr(clr
->msg
);
534 hdr
->nlmsg_type
= type
;
535 hdr
->nlmsg_flags
= NLM_F_REQUEST
;
537 nl_socket_disable_auto_ack(sock_rtnl
);
538 nl_send_auto_complete(sock_rtnl
, clr
->msg
);
539 nl_socket_enable_auto_ack(sock_rtnl
);
545 cb_finish_event(struct nl_msg
*msg
, void *arg
)
553 error_handler(struct sockaddr_nl
*nla
, struct nlmsgerr
*err
, void *arg
)
556 *pending
= err
->error
;
561 system_if_clear_entries(struct device
*dev
, int type
, int af
)
563 struct clear_data clr
;
564 struct nl_cb
*cb
= nl_cb_alloc(NL_CB_DEFAULT
);
567 .rtm_flags
= RTM_F_CLONED
,
569 int flags
= NLM_F_DUMP
;
578 clr
.size
= sizeof(struct rtgenmsg
);
581 clr
.size
= sizeof(struct rtmsg
);
590 clr
.msg
= nlmsg_alloc_simple(type
, flags
);
594 nlmsg_append(clr
.msg
, &rtm
, clr
.size
, 0);
595 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb_clear_event
, &clr
);
596 nl_cb_set(cb
, NL_CB_FINISH
, NL_CB_CUSTOM
, cb_finish_event
, &pending
);
597 nl_cb_err(cb
, NL_CB_CUSTOM
, error_handler
, &pending
);
599 nl_send_auto_complete(sock_rtnl
, clr
.msg
);
601 nl_recvmsgs(sock_rtnl
, cb
);
609 * Clear bridge (membership) state and bring down device
611 void system_if_clear_state(struct device
*dev
)
613 static char buf
[256];
616 device_set_ifindex(dev
, system_if_resolve(dev
));
617 if (dev
->external
|| !dev
->ifindex
)
620 system_if_flags(dev
->ifname
, 0, IFF_UP
);
622 if (system_is_bridge(dev
->ifname
, buf
, sizeof(buf
))) {
623 D(SYSTEM
, "Delete existing bridge named '%s'\n", dev
->ifname
);
624 system_bridge_delbr(dev
);
628 bridge
= system_get_bridge(dev
->ifname
, buf
, sizeof(buf
));
630 D(SYSTEM
, "Remove device '%s' from bridge '%s'\n", dev
->ifname
, bridge
);
631 system_bridge_if(bridge
, dev
, SIOCBRDELIF
, NULL
);
634 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET
);
635 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET
);
636 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET6
);
637 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET6
);
638 system_set_disable_ipv6(dev
, "0");
641 static inline unsigned long
642 sec_to_jiffies(int val
)
644 return (unsigned long) val
* 100;
647 int system_bridge_addbr(struct device
*bridge
, struct bridge_config
*cfg
)
649 unsigned long args
[4] = {};
651 if (ioctl(sock_ioctl
, SIOCBRADDBR
, bridge
->ifname
) < 0)
654 args
[0] = BRCTL_SET_BRIDGE_STP_STATE
;
655 args
[1] = !!cfg
->stp
;
656 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
658 args
[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY
;
659 args
[1] = sec_to_jiffies(cfg
->forward_delay
);
660 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
662 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
663 bridge
->ifname
, cfg
->igmp_snoop
? "1" : "0");
665 args
[0] = BRCTL_SET_BRIDGE_PRIORITY
;
666 args
[1] = cfg
->priority
;
667 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
669 if (cfg
->flags
& BRIDGE_OPT_AGEING_TIME
) {
670 args
[0] = BRCTL_SET_AGEING_TIME
;
671 args
[1] = sec_to_jiffies(cfg
->ageing_time
);
672 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
675 if (cfg
->flags
& BRIDGE_OPT_HELLO_TIME
) {
676 args
[0] = BRCTL_SET_BRIDGE_HELLO_TIME
;
677 args
[1] = sec_to_jiffies(cfg
->hello_time
);
678 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
681 if (cfg
->flags
& BRIDGE_OPT_MAX_AGE
) {
682 args
[0] = BRCTL_SET_BRIDGE_MAX_AGE
;
683 args
[1] = sec_to_jiffies(cfg
->max_age
);
684 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
690 int system_macvlan_add(struct device
*macvlan
, struct device
*dev
, struct macvlan_config
*cfg
)
693 struct nlattr
*linkinfo
, *data
;
694 struct ifinfomsg iim
= { .ifi_family
= AF_UNSPEC
, };
695 int ifindex
= system_if_resolve(dev
);
697 static const struct {
699 enum macvlan_mode val
;
701 { "private", MACVLAN_MODE_PRIVATE
},
702 { "vepa", MACVLAN_MODE_VEPA
},
703 { "bridge", MACVLAN_MODE_BRIDGE
},
704 { "passthru", MACVLAN_MODE_PASSTHRU
},
710 msg
= nlmsg_alloc_simple(RTM_NEWLINK
, NLM_F_REQUEST
| NLM_F_CREATE
| NLM_F_EXCL
);
715 nlmsg_append(msg
, &iim
, sizeof(iim
), 0);
717 if (cfg
->flags
& MACVLAN_OPT_MACADDR
)
718 nla_put(msg
, IFLA_ADDRESS
, sizeof(cfg
->macaddr
), cfg
->macaddr
);
719 nla_put_string(msg
, IFLA_IFNAME
, macvlan
->ifname
);
720 nla_put_u32(msg
, IFLA_LINK
, ifindex
);
722 if (!(linkinfo
= nla_nest_start(msg
, IFLA_LINKINFO
)))
723 goto nla_put_failure
;
725 nla_put_string(msg
, IFLA_INFO_KIND
, "macvlan");
727 if (!(data
= nla_nest_start(msg
, IFLA_INFO_DATA
)))
728 goto nla_put_failure
;
731 for (i
= 0; i
< ARRAY_SIZE(modes
); i
++) {
732 if (strcmp(cfg
->mode
, modes
[i
].name
) != 0)
735 nla_put_u32(msg
, IFLA_MACVLAN_MODE
, modes
[i
].val
);
740 nla_nest_end(msg
, data
);
741 nla_nest_end(msg
, linkinfo
);
743 rv
= system_rtnl_call(msg
);
745 D(SYSTEM
, "Error adding macvlan '%s' over '%s': %d\n", macvlan
->ifname
, dev
->ifname
, rv
);
754 int system_macvlan_del(struct device
*macvlan
)
757 struct ifinfomsg iim
= {
758 .ifi_family
= AF_UNSPEC
,
762 msg
= nlmsg_alloc_simple(RTM_DELLINK
, NLM_F_REQUEST
);
767 nlmsg_append(msg
, &iim
, sizeof(iim
), 0);
769 nla_put_string(msg
, IFLA_IFNAME
, macvlan
->ifname
);
771 system_rtnl_call(msg
);
776 static int system_vlan(struct device
*dev
, int id
)
778 struct vlan_ioctl_args ifr
= {
779 .cmd
= SET_VLAN_NAME_TYPE_CMD
,
780 .u
.name_type
= VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD
,
783 ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
786 ifr
.cmd
= DEL_VLAN_CMD
;
789 ifr
.cmd
= ADD_VLAN_CMD
;
792 strncpy(ifr
.device1
, dev
->ifname
, sizeof(ifr
.device1
));
793 return ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
796 int system_vlan_add(struct device
*dev
, int id
)
798 return system_vlan(dev
, id
);
801 int system_vlan_del(struct device
*dev
)
803 return system_vlan(dev
, -1);
806 int system_vlandev_add(struct device
*vlandev
, struct device
*dev
, struct vlandev_config
*cfg
)
809 struct nlattr
*linkinfo
, *data
;
810 struct ifinfomsg iim
= { .ifi_family
= AF_UNSPEC
};
811 int ifindex
= system_if_resolve(dev
);
817 msg
= nlmsg_alloc_simple(RTM_NEWLINK
, NLM_F_REQUEST
| NLM_F_CREATE
| NLM_F_EXCL
);
822 nlmsg_append(msg
, &iim
, sizeof(iim
), 0);
823 nla_put_string(msg
, IFLA_IFNAME
, vlandev
->ifname
);
824 nla_put_u32(msg
, IFLA_LINK
, ifindex
);
826 if (!(linkinfo
= nla_nest_start(msg
, IFLA_LINKINFO
)))
827 goto nla_put_failure
;
829 nla_put_string(msg
, IFLA_INFO_KIND
, "vlan");
831 if (!(data
= nla_nest_start(msg
, IFLA_INFO_DATA
)))
832 goto nla_put_failure
;
834 nla_put_u16(msg
, IFLA_VLAN_ID
, cfg
->vid
);
836 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
837 nla_put_u16(msg
, IFLA_VLAN_PROTOCOL
, htons(cfg
->proto
));
839 if(cfg
->proto
== VLAN_PROTO_8021AD
)
840 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
);
843 nla_nest_end(msg
, data
);
844 nla_nest_end(msg
, linkinfo
);
846 rv
= system_rtnl_call(msg
);
848 D(SYSTEM
, "Error adding vlandev '%s' over '%s': %d\n", vlandev
->ifname
, dev
->ifname
, rv
);
857 int system_vlandev_del(struct device
*vlandev
)
860 struct ifinfomsg iim
= {
861 .ifi_family
= AF_UNSPEC
,
865 msg
= nlmsg_alloc_simple(RTM_DELLINK
, NLM_F_REQUEST
);
870 nlmsg_append(msg
, &iim
, sizeof(iim
), 0);
872 nla_put_string(msg
, IFLA_IFNAME
, vlandev
->ifname
);
874 system_rtnl_call(msg
);
880 system_if_get_settings(struct device
*dev
, struct device_settings
*s
)
885 memset(&ifr
, 0, sizeof(ifr
));
886 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
888 if (ioctl(sock_ioctl
, SIOCGIFMTU
, &ifr
) == 0) {
889 s
->mtu
= ifr
.ifr_mtu
;
890 s
->flags
|= DEV_OPT_MTU
;
893 if (ioctl(sock_ioctl
, SIOCGIFTXQLEN
, &ifr
) == 0) {
894 s
->txqueuelen
= ifr
.ifr_qlen
;
895 s
->flags
|= DEV_OPT_TXQUEUELEN
;
898 if (ioctl(sock_ioctl
, SIOCGIFHWADDR
, &ifr
) == 0) {
899 memcpy(s
->macaddr
, &ifr
.ifr_hwaddr
.sa_data
, sizeof(s
->macaddr
));
900 s
->flags
|= DEV_OPT_MACADDR
;
903 if (!system_get_disable_ipv6(dev
, buf
, sizeof(buf
))) {
904 s
->ipv6
= !strtoul(buf
, NULL
, 0);
905 s
->flags
|= DEV_OPT_IPV6
;
910 system_if_apply_settings(struct device
*dev
, struct device_settings
*s
, unsigned int apply_mask
)
917 memset(&ifr
, 0, sizeof(ifr
));
918 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
919 if (s
->flags
& DEV_OPT_MTU
& apply_mask
) {
920 ifr
.ifr_mtu
= s
->mtu
;
921 if (ioctl(sock_ioctl
, SIOCSIFMTU
, &ifr
) < 0)
922 s
->flags
&= ~DEV_OPT_MTU
;
924 if (s
->flags
& DEV_OPT_TXQUEUELEN
& apply_mask
) {
925 ifr
.ifr_qlen
= s
->txqueuelen
;
926 if (ioctl(sock_ioctl
, SIOCSIFTXQLEN
, &ifr
) < 0)
927 s
->flags
&= ~DEV_OPT_TXQUEUELEN
;
929 if ((s
->flags
& DEV_OPT_MACADDR
& apply_mask
) && !dev
->external
) {
930 ifr
.ifr_hwaddr
.sa_family
= ARPHRD_ETHER
;
931 memcpy(&ifr
.ifr_hwaddr
.sa_data
, s
->macaddr
, sizeof(s
->macaddr
));
932 if (ioctl(sock_ioctl
, SIOCSIFHWADDR
, &ifr
) < 0)
933 s
->flags
&= ~DEV_OPT_MACADDR
;
935 if (s
->flags
& DEV_OPT_IPV6
& apply_mask
)
936 system_set_disable_ipv6(dev
, s
->ipv6
? "0" : "1");
939 int system_if_up(struct device
*dev
)
941 system_if_get_settings(dev
, &dev
->orig_settings
);
942 system_if_apply_settings(dev
, &dev
->settings
, dev
->settings
.flags
);
943 device_set_ifindex(dev
, system_if_resolve(dev
));
944 return system_if_flags(dev
->ifname
, IFF_UP
, 0);
947 int system_if_down(struct device
*dev
)
949 int ret
= system_if_flags(dev
->ifname
, 0, IFF_UP
);
950 dev
->orig_settings
.flags
&= dev
->settings
.flags
;
951 system_if_apply_settings(dev
, &dev
->orig_settings
, dev
->orig_settings
.flags
);
955 struct if_check_data
{
961 static int cb_if_check_valid(struct nl_msg
*msg
, void *arg
)
963 struct nlmsghdr
*nh
= nlmsg_hdr(msg
);
964 struct ifinfomsg
*ifi
= NLMSG_DATA(nh
);
965 struct if_check_data
*chk
= (struct if_check_data
*)arg
;
967 if (nh
->nlmsg_type
!= RTM_NEWLINK
)
970 device_set_present(chk
->dev
, ifi
->ifi_index
> 0 ? true : false);
971 device_set_link(chk
->dev
, ifi
->ifi_flags
& IFF_LOWER_UP
? true : false);
976 static int cb_if_check_ack(struct nl_msg
*msg
, void *arg
)
978 struct if_check_data
*chk
= (struct if_check_data
*)arg
;
983 static int cb_if_check_error(struct sockaddr_nl
*nla
, struct nlmsgerr
*err
, void *arg
)
985 struct if_check_data
*chk
= (struct if_check_data
*)arg
;
987 device_set_present(chk
->dev
, false);
988 device_set_link(chk
->dev
, false);
989 chk
->pending
= err
->error
;
994 int system_if_check(struct device
*dev
)
996 struct nl_cb
*cb
= nl_cb_alloc(NL_CB_DEFAULT
);
998 struct ifinfomsg ifi
= {
999 .ifi_family
= AF_UNSPEC
,
1002 struct if_check_data chk
= {
1008 msg
= nlmsg_alloc_simple(RTM_GETLINK
, 0);
1009 if (!msg
|| nlmsg_append(msg
, &ifi
, sizeof(ifi
), 0) ||
1010 nla_put_string(msg
, IFLA_IFNAME
, dev
->ifname
))
1013 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb_if_check_valid
, &chk
);
1014 nl_cb_set(cb
, NL_CB_ACK
, NL_CB_CUSTOM
, cb_if_check_ack
, &chk
);
1015 nl_cb_err(cb
, NL_CB_CUSTOM
, cb_if_check_error
, &chk
);
1017 nl_send_auto_complete(sock_rtnl
, msg
);
1018 while (chk
.pending
> 0)
1019 nl_recvmsgs(sock_rtnl
, cb
);
1030 system_if_get_parent(struct device
*dev
)
1032 char buf
[64], *devname
;
1033 int ifindex
, iflink
, len
;
1036 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/iflink", dev
->ifname
);
1037 f
= fopen(buf
, "r");
1041 len
= fread(buf
, 1, sizeof(buf
) - 1, f
);
1048 iflink
= strtoul(buf
, NULL
, 0);
1049 ifindex
= system_if_resolve(dev
);
1050 if (!iflink
|| iflink
== ifindex
)
1053 devname
= if_indextoname(iflink
, buf
);
1057 return device_get(devname
, true);
1061 read_string_file(int dir_fd
, const char *file
, char *buf
, int len
)
1067 fd
= openat(dir_fd
, file
, O_RDONLY
);
1072 len
= read(fd
, buf
, len
- 1);
1076 } else if (len
> 0) {
1079 c
= strchr(buf
, '\n');
1092 read_uint64_file(int dir_fd
, const char *file
, uint64_t *val
)
1097 ret
= read_string_file(dir_fd
, file
, buf
, sizeof(buf
));
1099 *val
= strtoull(buf
, NULL
, 0);
1104 /* Assume advertised flags == supported flags */
1105 static const struct {
1108 } ethtool_link_modes
[] = {
1109 { ADVERTISED_10baseT_Half
, "10H" },
1110 { ADVERTISED_10baseT_Full
, "10F" },
1111 { ADVERTISED_100baseT_Half
, "100H" },
1112 { ADVERTISED_100baseT_Full
, "100F" },
1113 { ADVERTISED_1000baseT_Half
, "1000H" },
1114 { ADVERTISED_1000baseT_Full
, "1000F" },
1117 static void system_add_link_modes(struct blob_buf
*b
, __u32 mask
)
1120 for (i
= 0; i
< ARRAY_SIZE(ethtool_link_modes
); i
++) {
1121 if (mask
& ethtool_link_modes
[i
].mask
)
1122 blobmsg_add_string(b
, NULL
, ethtool_link_modes
[i
].name
);
1127 system_if_force_external(const char *ifname
)
1132 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/phy80211", ifname
);
1133 return stat(buf
, &s
) == 0;
1137 system_if_dump_info(struct device
*dev
, struct blob_buf
*b
)
1139 struct ethtool_cmd ecmd
;
1145 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s", dev
->ifname
);
1146 dir_fd
= open(buf
, O_DIRECTORY
);
1148 memset(&ecmd
, 0, sizeof(ecmd
));
1149 memset(&ifr
, 0, sizeof(ifr
));
1150 strcpy(ifr
.ifr_name
, dev
->ifname
);
1151 ifr
.ifr_data
= (caddr_t
) &ecmd
;
1152 ecmd
.cmd
= ETHTOOL_GSET
;
1154 if (ioctl(sock_ioctl
, SIOCETHTOOL
, &ifr
) == 0) {
1155 c
= blobmsg_open_array(b
, "link-advertising");
1156 system_add_link_modes(b
, ecmd
.advertising
);
1157 blobmsg_close_array(b
, c
);
1159 c
= blobmsg_open_array(b
, "link-supported");
1160 system_add_link_modes(b
, ecmd
.supported
);
1161 blobmsg_close_array(b
, c
);
1163 s
= blobmsg_alloc_string_buffer(b
, "speed", 8);
1164 snprintf(s
, 8, "%d%c", ethtool_cmd_speed(&ecmd
),
1165 ecmd
.duplex
== DUPLEX_HALF
? 'H' : 'F');
1166 blobmsg_add_string_buffer(b
);
1174 system_if_dump_stats(struct device
*dev
, struct blob_buf
*b
)
1176 const char *const counters
[] = {
1177 "collisions", "rx_frame_errors", "tx_compressed",
1178 "multicast", "rx_length_errors", "tx_dropped",
1179 "rx_bytes", "rx_missed_errors", "tx_errors",
1180 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1181 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1182 "rx_dropped", "tx_aborted_errors", "tx_packets",
1183 "rx_errors", "tx_bytes", "tx_window_errors",
1184 "rx_fifo_errors", "tx_carrier_errors",
1191 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/statistics", dev
->ifname
);
1192 stats_dir
= open(buf
, O_DIRECTORY
);
1196 for (i
= 0; i
< ARRAY_SIZE(counters
); i
++)
1197 if (read_uint64_file(stats_dir
, counters
[i
], &val
))
1198 blobmsg_add_u64(b
, counters
[i
], val
);
1204 static int system_addr(struct device
*dev
, struct device_addr
*addr
, int cmd
)
1206 bool v4
= ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
);
1207 int alen
= v4
? 4 : 16;
1208 unsigned int flags
= 0;
1209 struct ifaddrmsg ifa
= {
1210 .ifa_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1211 .ifa_prefixlen
= addr
->mask
,
1212 .ifa_index
= dev
->ifindex
,
1216 if (cmd
== RTM_NEWADDR
)
1217 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
1219 msg
= nlmsg_alloc_simple(cmd
, flags
);
1223 nlmsg_append(msg
, &ifa
, sizeof(ifa
), 0);
1224 nla_put(msg
, IFA_LOCAL
, alen
, &addr
->addr
);
1226 if (addr
->broadcast
)
1227 nla_put_u32(msg
, IFA_BROADCAST
, addr
->broadcast
);
1228 if (addr
->point_to_point
)
1229 nla_put_u32(msg
, IFA_ADDRESS
, addr
->point_to_point
);
1231 time_t now
= system_get_rtime();
1232 struct ifa_cacheinfo cinfo
= {0xffffffffU
, 0xffffffffU
, 0, 0};
1234 if (addr
->preferred_until
) {
1235 int64_t preferred
= addr
->preferred_until
- now
;
1238 else if (preferred
> UINT32_MAX
)
1239 preferred
= UINT32_MAX
;
1241 cinfo
.ifa_prefered
= preferred
;
1244 if (addr
->valid_until
) {
1245 int64_t valid
= addr
->valid_until
- now
;
1248 else if (valid
> UINT32_MAX
)
1251 cinfo
.ifa_valid
= valid
;
1254 nla_put(msg
, IFA_CACHEINFO
, sizeof(cinfo
), &cinfo
);
1257 return system_rtnl_call(msg
);
1260 int system_add_address(struct device
*dev
, struct device_addr
*addr
)
1262 return system_addr(dev
, addr
, RTM_NEWADDR
);
1265 int system_del_address(struct device
*dev
, struct device_addr
*addr
)
1267 return system_addr(dev
, addr
, RTM_DELADDR
);
1270 static int system_rt(struct device
*dev
, struct device_route
*route
, int cmd
)
1272 int alen
= ((route
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
) ? 4 : 16;
1274 unsigned int flags
= 0;
1277 have_gw
= !!route
->nexthop
.in
.s_addr
;
1279 have_gw
= route
->nexthop
.in6
.s6_addr32
[0] ||
1280 route
->nexthop
.in6
.s6_addr32
[1] ||
1281 route
->nexthop
.in6
.s6_addr32
[2] ||
1282 route
->nexthop
.in6
.s6_addr32
[3];
1284 unsigned char scope
= (cmd
== RTM_DELROUTE
) ? RT_SCOPE_NOWHERE
:
1285 (have_gw
) ? RT_SCOPE_UNIVERSE
: RT_SCOPE_LINK
;
1287 unsigned int table
= (route
->flags
& (DEVROUTE_TABLE
| DEVROUTE_SRCTABLE
))
1288 ? route
->table
: RT_TABLE_MAIN
;
1290 struct rtmsg rtm
= {
1291 .rtm_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1292 .rtm_dst_len
= route
->mask
,
1293 .rtm_src_len
= route
->sourcemask
,
1294 .rtm_table
= (table
< 256) ? table
: RT_TABLE_UNSPEC
,
1295 .rtm_protocol
= (route
->flags
& DEVADDR_KERNEL
) ? RTPROT_KERNEL
: RTPROT_STATIC
,
1297 .rtm_type
= (cmd
== RTM_DELROUTE
) ? 0: RTN_UNICAST
,
1298 .rtm_flags
= (route
->flags
& DEVROUTE_ONLINK
) ? RTNH_F_ONLINK
: 0,
1302 if (cmd
== RTM_NEWROUTE
) {
1303 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
1305 if (!dev
) { // Add null-route
1306 rtm
.rtm_scope
= RT_SCOPE_UNIVERSE
;
1307 rtm
.rtm_type
= RTN_UNREACHABLE
;
1311 msg
= nlmsg_alloc_simple(cmd
, flags
);
1315 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
1318 nla_put(msg
, RTA_DST
, alen
, &route
->addr
);
1320 if (route
->sourcemask
)
1321 nla_put(msg
, RTA_SRC
, alen
, &route
->source
);
1323 if (route
->metric
> 0)
1324 nla_put_u32(msg
, RTA_PRIORITY
, route
->metric
);
1327 nla_put(msg
, RTA_GATEWAY
, alen
, &route
->nexthop
);
1330 nla_put_u32(msg
, RTA_OIF
, dev
->ifindex
);
1333 nla_put_u32(msg
, RTA_TABLE
, table
);
1335 if (route
->flags
& DEVROUTE_MTU
) {
1336 struct nlattr
*metrics
;
1338 if (!(metrics
= nla_nest_start(msg
, RTA_METRICS
)))
1339 goto nla_put_failure
;
1341 nla_put_u32(msg
, RTAX_MTU
, route
->mtu
);
1343 nla_nest_end(msg
, metrics
);
1346 return system_rtnl_call(msg
);
1353 int system_add_route(struct device
*dev
, struct device_route
*route
)
1355 return system_rt(dev
, route
, RTM_NEWROUTE
);
1358 int system_del_route(struct device
*dev
, struct device_route
*route
)
1360 return system_rt(dev
, route
, RTM_DELROUTE
);
1363 int system_flush_routes(void)
1365 const char *names
[] = {
1366 "/proc/sys/net/ipv4/route/flush",
1367 "/proc/sys/net/ipv6/route/flush"
1371 for (i
= 0; i
< ARRAY_SIZE(names
); i
++) {
1372 fd
= open(names
[i
], O_WRONLY
);
1376 if (write(fd
, "-1", 2)) {}
1382 bool system_resolve_rt_table(const char *name
, unsigned int *id
)
1386 unsigned int n
, table
= RT_TABLE_UNSPEC
;
1388 /* first try to parse table as number */
1389 if ((n
= strtoul(name
, &e
, 0)) > 0 && !*e
)
1392 /* handle well known aliases */
1393 else if (!strcmp(name
, "default"))
1394 table
= RT_TABLE_DEFAULT
;
1395 else if (!strcmp(name
, "main"))
1396 table
= RT_TABLE_MAIN
;
1397 else if (!strcmp(name
, "local"))
1398 table
= RT_TABLE_LOCAL
;
1400 /* try to look up name in /etc/iproute2/rt_tables */
1401 else if ((f
= fopen("/etc/iproute2/rt_tables", "r")) != NULL
)
1403 while (fgets(buf
, sizeof(buf
) - 1, f
) != NULL
)
1405 if ((e
= strtok(buf
, " \t\n")) == NULL
|| *e
== '#')
1408 n
= strtoul(e
, NULL
, 10);
1409 e
= strtok(NULL
, " \t\n");
1411 if (e
&& !strcmp(e
, name
))
1421 if (table
== RT_TABLE_UNSPEC
)
1424 /* do not consider main table special */
1425 if (table
== RT_TABLE_MAIN
)
1426 table
= RT_TABLE_UNSPEC
;
1432 static int system_iprule(struct iprule
*rule
, int cmd
)
1434 int alen
= ((rule
->flags
& IPRULE_FAMILY
) == IPRULE_INET4
) ? 4 : 16;
1437 struct rtmsg rtm
= {
1438 .rtm_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
1439 .rtm_protocol
= RTPROT_STATIC
,
1440 .rtm_scope
= RT_SCOPE_UNIVERSE
,
1441 .rtm_table
= RT_TABLE_UNSPEC
,
1442 .rtm_type
= RTN_UNSPEC
,
1446 if (cmd
== RTM_NEWRULE
) {
1447 rtm
.rtm_type
= RTN_UNICAST
;
1448 rtm
.rtm_flags
|= NLM_F_REPLACE
| NLM_F_EXCL
;
1452 rtm
.rtm_flags
|= FIB_RULE_INVERT
;
1454 if (rule
->flags
& IPRULE_SRC
)
1455 rtm
.rtm_src_len
= rule
->src_mask
;
1457 if (rule
->flags
& IPRULE_DEST
)
1458 rtm
.rtm_dst_len
= rule
->dest_mask
;
1460 if (rule
->flags
& IPRULE_TOS
)
1461 rtm
.rtm_tos
= rule
->tos
;
1463 if (rule
->flags
& IPRULE_LOOKUP
) {
1464 if (rule
->lookup
< 256)
1465 rtm
.rtm_table
= rule
->lookup
;
1468 if (rule
->flags
& IPRULE_ACTION
)
1469 rtm
.rtm_type
= rule
->action
;
1470 else if (rule
->flags
& IPRULE_GOTO
)
1471 rtm
.rtm_type
= FR_ACT_GOTO
;
1472 else if (!(rule
->flags
& (IPRULE_LOOKUP
| IPRULE_ACTION
| IPRULE_GOTO
)))
1473 rtm
.rtm_type
= FR_ACT_NOP
;
1475 msg
= nlmsg_alloc_simple(cmd
, NLM_F_REQUEST
);
1480 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
1482 if (rule
->flags
& IPRULE_IN
)
1483 nla_put(msg
, FRA_IFNAME
, strlen(rule
->in_dev
) + 1, rule
->in_dev
);
1485 if (rule
->flags
& IPRULE_OUT
)
1486 nla_put(msg
, FRA_OIFNAME
, strlen(rule
->out_dev
) + 1, rule
->out_dev
);
1488 if (rule
->flags
& IPRULE_SRC
)
1489 nla_put(msg
, FRA_SRC
, alen
, &rule
->src_addr
);
1491 if (rule
->flags
& IPRULE_DEST
)
1492 nla_put(msg
, FRA_DST
, alen
, &rule
->dest_addr
);
1494 if (rule
->flags
& IPRULE_PRIORITY
)
1495 nla_put_u32(msg
, FRA_PRIORITY
, rule
->priority
);
1496 else if (cmd
== RTM_NEWRULE
)
1497 nla_put_u32(msg
, FRA_PRIORITY
, rule
->order
);
1499 if (rule
->flags
& IPRULE_FWMARK
)
1500 nla_put_u32(msg
, FRA_FWMARK
, rule
->fwmark
);
1502 if (rule
->flags
& IPRULE_FWMASK
)
1503 nla_put_u32(msg
, FRA_FWMASK
, rule
->fwmask
);
1505 if (rule
->flags
& IPRULE_LOOKUP
) {
1506 if (rule
->lookup
>= 256)
1507 nla_put_u32(msg
, FRA_TABLE
, rule
->lookup
);
1510 if (rule
->flags
& IPRULE_GOTO
)
1511 nla_put_u32(msg
, FRA_GOTO
, rule
->gotoid
);
1513 return system_rtnl_call(msg
);
1516 int system_add_iprule(struct iprule
*rule
)
1518 return system_iprule(rule
, RTM_NEWRULE
);
1521 int system_del_iprule(struct iprule
*rule
)
1523 return system_iprule(rule
, RTM_DELRULE
);
1526 int system_flush_iprules(void)
1531 system_if_clear_entries(NULL
, RTM_GETRULE
, AF_INET
);
1532 system_if_clear_entries(NULL
, RTM_GETRULE
, AF_INET6
);
1534 memset(&rule
, 0, sizeof(rule
));
1537 rule
.flags
= IPRULE_INET4
| IPRULE_PRIORITY
| IPRULE_LOOKUP
;
1540 rule
.lookup
= RT_TABLE_LOCAL
;
1541 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1543 rule
.priority
= 32766;
1544 rule
.lookup
= RT_TABLE_MAIN
;
1545 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1547 rule
.priority
= 32767;
1548 rule
.lookup
= RT_TABLE_DEFAULT
;
1549 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1552 rule
.flags
= IPRULE_INET6
| IPRULE_PRIORITY
| IPRULE_LOOKUP
;
1555 rule
.lookup
= RT_TABLE_LOCAL
;
1556 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1558 rule
.priority
= 32766;
1559 rule
.lookup
= RT_TABLE_MAIN
;
1560 rv
|= system_iprule(&rule
, RTM_NEWRULE
);
1565 bool system_resolve_iprule_action(const char *action
, unsigned int *id
)
1570 if (!strcmp(action
, "local"))
1572 else if (!strcmp(action
, "nat"))
1574 else if (!strcmp(action
, "broadcast"))
1576 else if (!strcmp(action
, "anycast"))
1578 else if (!strcmp(action
, "multicast"))
1580 else if (!strcmp(action
, "prohibit"))
1582 else if (!strcmp(action
, "unreachable"))
1583 n
= RTN_UNREACHABLE
;
1584 else if (!strcmp(action
, "blackhole"))
1586 else if (!strcmp(action
, "xresolve"))
1588 else if (!strcmp(action
, "unicast"))
1590 else if (!strcmp(action
, "throw"))
1592 else if (!strcmp(action
, "failed_policy"))
1593 n
= RTN_FAILED_POLICY
;
1595 n
= strtoul(action
, &e
, 0);
1596 if (!e
|| *e
|| e
== action
|| n
> 255)
1604 time_t system_get_rtime(void)
1609 if (syscall(__NR_clock_gettime
, CLOCK_MONOTONIC
, &ts
) == 0)
1612 if (gettimeofday(&tv
, NULL
) == 0)
1619 #define IP_DF 0x4000
1622 static int tunnel_ioctl(const char *name
, int cmd
, void *p
)
1626 memset(&ifr
, 0, sizeof(ifr
));
1627 strncpy(ifr
.ifr_name
, name
, sizeof(ifr
.ifr_name
));
1628 ifr
.ifr_ifru
.ifru_data
= p
;
1629 return ioctl(sock_ioctl
, cmd
, &ifr
);
1632 int system_del_ip_tunnel(const char *name
)
1634 return tunnel_ioctl(name
, SIOCDELTUNNEL
, NULL
);
1637 int system_update_ipv6_mtu(struct device
*dev
, int mtu
)
1641 snprintf(buf
, sizeof(buf
), "/proc/sys/net/ipv6/conf/%s/mtu",
1644 int fd
= open(buf
, O_RDWR
);
1645 ssize_t len
= read(fd
, buf
, sizeof(buf
) - 1);
1652 if (!mtu
|| ret
<= mtu
)
1655 lseek(fd
, 0, SEEK_SET
);
1656 if (write(fd
, buf
, snprintf(buf
, sizeof(buf
), "%i", mtu
)) <= 0)
1664 int system_add_ip_tunnel(const char *name
, struct blob_attr
*attr
)
1666 struct blob_attr
*tb
[__TUNNEL_ATTR_MAX
];
1667 struct blob_attr
*cur
;
1671 system_del_ip_tunnel(name
);
1673 blobmsg_parse(tunnel_attr_list
.params
, __TUNNEL_ATTR_MAX
, tb
,
1674 blob_data(attr
), blob_len(attr
));
1676 if (!(cur
= tb
[TUNNEL_ATTR_TYPE
]))
1678 str
= blobmsg_data(cur
);
1680 if ((cur
= tb
[TUNNEL_ATTR_DF
]))
1681 set_df
= blobmsg_get_bool(cur
);
1683 unsigned int ttl
= 0;
1684 if ((cur
= tb
[TUNNEL_ATTR_TTL
])) {
1685 ttl
= blobmsg_get_u32(cur
);
1686 if (ttl
> 255 || (!set_df
&& ttl
))
1690 unsigned int link
= 0;
1691 if ((cur
= tb
[TUNNEL_ATTR_LINK
])) {
1692 struct interface
*iface
= vlist_find(&interfaces
, blobmsg_data(cur
), iface
, node
);
1696 if (iface
->l3_dev
.dev
)
1697 link
= iface
->l3_dev
.dev
->ifindex
;
1700 if (!strcmp(str
, "sit")) {
1701 struct ip_tunnel_parm p
= {
1706 .frag_off
= set_df
? htons(IP_DF
) : 0,
1707 .protocol
= IPPROTO_IPV6
,
1712 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
]) &&
1713 inet_pton(AF_INET
, blobmsg_data(cur
), &p
.iph
.saddr
) < 1)
1716 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
]) &&
1717 inet_pton(AF_INET
, blobmsg_data(cur
), &p
.iph
.daddr
) < 1)
1720 strncpy(p
.name
, name
, sizeof(p
.name
));
1721 if (tunnel_ioctl("sit0", SIOCADDTUNNEL
, &p
) < 0)
1725 if ((cur
= tb
[TUNNEL_ATTR_6RD_PREFIX
])) {
1727 struct ip_tunnel_6rd p6
;
1729 memset(&p6
, 0, sizeof(p6
));
1731 if (!parse_ip_and_netmask(AF_INET6
, blobmsg_data(cur
),
1732 &p6
.prefix
, &mask
) || mask
> 128)
1734 p6
.prefixlen
= mask
;
1736 if ((cur
= tb
[TUNNEL_ATTR_6RD_RELAY_PREFIX
])) {
1737 if (!parse_ip_and_netmask(AF_INET
, blobmsg_data(cur
),
1738 &p6
.relay_prefix
, &mask
) || mask
> 32)
1740 p6
.relay_prefixlen
= mask
;
1743 if (tunnel_ioctl(name
, SIOCADD6RD
, &p6
) < 0) {
1744 system_del_ip_tunnel(name
);
1749 } else if (!strcmp(str
, "ipip6")) {
1750 struct nl_msg
*nlm
= nlmsg_alloc_simple(RTM_NEWLINK
,
1751 NLM_F_REQUEST
| NLM_F_REPLACE
| NLM_F_CREATE
);
1752 struct ifinfomsg ifi
= { .ifi_family
= AF_UNSPEC
};
1758 nlmsg_append(nlm
, &ifi
, sizeof(ifi
), 0);
1759 nla_put_string(nlm
, IFLA_IFNAME
, name
);
1762 nla_put_u32(nlm
, IFLA_LINK
, link
);
1764 struct nlattr
*linkinfo
= nla_nest_start(nlm
, IFLA_LINKINFO
);
1769 nla_put_string(nlm
, IFLA_INFO_KIND
, "ip6tnl");
1770 struct nlattr
*infodata
= nla_nest_start(nlm
, IFLA_INFO_DATA
);
1777 nla_put_u32(nlm
, IFLA_IPTUN_LINK
, link
);
1779 nla_put_u8(nlm
, IFLA_IPTUN_PROTO
, IPPROTO_IPIP
);
1780 nla_put_u8(nlm
, IFLA_IPTUN_TTL
, (ttl
) ? ttl
: 64);
1781 nla_put_u8(nlm
, IFLA_IPTUN_ENCAP_LIMIT
, 4);
1783 struct in6_addr in6buf
;
1784 if ((cur
= tb
[TUNNEL_ATTR_LOCAL
])) {
1785 if (inet_pton(AF_INET6
, blobmsg_data(cur
), &in6buf
) < 1) {
1789 nla_put(nlm
, IFLA_IPTUN_LOCAL
, sizeof(in6buf
), &in6buf
);
1792 if ((cur
= tb
[TUNNEL_ATTR_REMOTE
])) {
1793 if (inet_pton(AF_INET6
, blobmsg_data(cur
), &in6buf
) < 1) {
1797 nla_put(nlm
, IFLA_IPTUN_REMOTE
, sizeof(in6buf
), &in6buf
);
1800 #ifdef IFLA_IPTUN_FMR_MAX
1801 if ((cur
= tb
[TUNNEL_ATTR_FMRS
])) {
1802 struct nlattr
*fmrs
= nla_nest_start(nlm
, IFLA_IPTUN_FMRS
);
1804 struct blob_attr
*fmr
;
1805 unsigned rem
, fmrcnt
= 0;
1806 blobmsg_for_each_attr(fmr
, cur
, rem
) {
1807 if (blobmsg_type(fmr
) != BLOBMSG_TYPE_STRING
)
1810 unsigned ip4len
, ip6len
, ealen
, offset
= 6;
1814 if (sscanf(blobmsg_get_string(fmr
), "%47[^/]/%u,%15[^/]/%u,%u,%u",
1815 ip6buf
, &ip6len
, ip4buf
, &ip4len
, &ealen
, &offset
) < 5) {
1820 struct in6_addr ip6prefix
;
1821 struct in_addr ip4prefix
;
1822 if (inet_pton(AF_INET6
, ip6buf
, &ip6prefix
) != 1 ||
1823 inet_pton(AF_INET
, ip4buf
, &ip4prefix
) != 1) {
1828 struct nlattr
*rule
= nla_nest_start(nlm
, ++fmrcnt
);
1830 nla_put(nlm
, IFLA_IPTUN_FMR_IP6_PREFIX
, sizeof(ip6prefix
), &ip6prefix
);
1831 nla_put(nlm
, IFLA_IPTUN_FMR_IP4_PREFIX
, sizeof(ip4prefix
), &ip4prefix
);
1832 nla_put_u8(nlm
, IFLA_IPTUN_FMR_IP6_PREFIX_LEN
, ip6len
);
1833 nla_put_u8(nlm
, IFLA_IPTUN_FMR_IP4_PREFIX_LEN
, ip4len
);
1834 nla_put_u8(nlm
, IFLA_IPTUN_FMR_EA_LEN
, ealen
);
1835 nla_put_u8(nlm
, IFLA_IPTUN_FMR_OFFSET
, offset
);
1837 nla_nest_end(nlm
, rule
);
1840 nla_nest_end(nlm
, fmrs
);
1844 nla_nest_end(nlm
, infodata
);
1845 nla_nest_end(nlm
, linkinfo
);
1847 return system_rtnl_call(nlm
);