2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2
7 * as published by the Free Software Foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
16 #include <sys/socket.h>
17 #include <sys/ioctl.h>
19 #include <sys/syscall.h>
22 #include <net/if_arp.h>
24 #include <arpa/inet.h>
25 #include <netinet/in.h>
27 #include <linux/rtnetlink.h>
28 #include <linux/sockios.h>
30 #include <linux/if_vlan.h>
31 #include <linux/if_bridge.h>
32 #include <linux/if_tunnel.h>
33 #include <linux/ethtool.h>
41 #include <netlink/msg.h>
42 #include <netlink/attr.h>
43 #include <netlink/socket.h>
44 #include <libubox/uloop.h>
51 struct uloop_fd uloop
;
56 static int sock_ioctl
= -1;
57 static struct nl_sock
*sock_rtnl
= NULL
;
59 static int cb_rtnl_event(struct nl_msg
*msg
, void *arg
);
60 static void handle_hotplug_event(struct uloop_fd
*u
, unsigned int events
);
62 static char dev_buf
[256];
65 handler_nl_event(struct uloop_fd
*u
, unsigned int events
)
67 struct event_socket
*ev
= container_of(u
, struct event_socket
, uloop
);
68 nl_recvmsgs(ev
->sock
, ev
->cb
);
71 static struct nl_sock
*
72 create_socket(int protocol
, int groups
)
76 sock
= nl_socket_alloc();
81 nl_join_groups(sock
, groups
);
83 if (nl_connect(sock
, protocol
))
90 create_raw_event_socket(struct event_socket
*ev
, int protocol
, int groups
,
93 ev
->sock
= create_socket(protocol
, groups
);
97 ev
->uloop
.fd
= nl_socket_get_fd(ev
->sock
);
99 uloop_fd_add(&ev
->uloop
, ULOOP_READ
| ULOOP_EDGE_TRIGGER
);
104 create_event_socket(struct event_socket
*ev
, int protocol
,
105 int (*cb
)(struct nl_msg
*msg
, void *arg
))
107 // Prepare socket for link events
108 ev
->cb
= nl_cb_alloc(NL_CB_DEFAULT
);
112 nl_cb_set(ev
->cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb
, NULL
);
114 return create_raw_event_socket(ev
, protocol
, 0, handler_nl_event
);
117 int system_init(void)
119 static struct event_socket rtnl_event
;
120 static struct event_socket hotplug_event
;
122 sock_ioctl
= socket(AF_LOCAL
, SOCK_DGRAM
, 0);
123 fcntl(sock_ioctl
, F_SETFD
, fcntl(sock_ioctl
, F_GETFD
) | FD_CLOEXEC
);
125 // Prepare socket for routing / address control
126 sock_rtnl
= create_socket(NETLINK_ROUTE
, 0);
130 if (!create_event_socket(&rtnl_event
, NETLINK_ROUTE
, cb_rtnl_event
))
133 if (!create_raw_event_socket(&hotplug_event
, NETLINK_KOBJECT_UEVENT
, 1,
134 handle_hotplug_event
))
137 // Receive network link events form kernel
138 nl_socket_add_membership(rtnl_event
.sock
, RTNLGRP_LINK
);
143 static void system_set_sysctl(const char *path
, const char *val
)
147 fd
= open(path
, O_WRONLY
);
151 write(fd
, val
, strlen(val
));
155 static void system_set_dev_sysctl(const char *path
, const char *device
, const char *val
)
157 snprintf(dev_buf
, sizeof(dev_buf
), path
, device
);
158 system_set_sysctl(dev_buf
, val
);
161 static void system_set_disable_ipv6(struct device
*dev
, const char *val
)
163 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev
->ifname
, val
);
166 // Evaluate netlink messages
167 static int cb_rtnl_event(struct nl_msg
*msg
, void *arg
)
169 struct nlmsghdr
*nh
= nlmsg_hdr(msg
);
170 struct ifinfomsg
*ifi
= NLMSG_DATA(nh
);
171 struct nlattr
*nla
[__IFLA_MAX
];
173 if (nh
->nlmsg_type
!= RTM_DELLINK
&& nh
->nlmsg_type
!= RTM_NEWLINK
)
176 nlmsg_parse(nh
, sizeof(*ifi
), nla
, __IFLA_MAX
- 1, NULL
);
177 if (!nla
[IFLA_IFNAME
])
180 struct device
*dev
= device_get(RTA_DATA(nla
[IFLA_IFNAME
]), false);
184 dev
->ifindex
= ifi
->ifi_index
;
185 /* TODO: parse link status */
192 handle_hotplug_msg(char *data
, int size
)
194 const char *subsystem
= NULL
, *interface
= NULL
;
195 char *cur
, *end
, *sep
;
200 if (!strncmp(data
, "add@", 4))
202 else if (!strncmp(data
, "remove@", 7))
207 skip
= strlen(data
) + 1;
210 for (cur
= data
+ skip
; cur
< end
; cur
+= skip
) {
211 skip
= strlen(cur
) + 1;
213 sep
= strchr(cur
, '=');
218 if (!strcmp(cur
, "INTERFACE"))
220 else if (!strcmp(cur
, "SUBSYSTEM")) {
222 if (strcmp(subsystem
, "net") != 0)
225 if (subsystem
&& interface
)
231 dev
= device_get(interface
, false);
235 if (dev
->type
!= &simple_device_type
)
238 if (add
&& system_if_force_external(dev
->ifname
))
241 device_set_present(dev
, add
);
245 handle_hotplug_event(struct uloop_fd
*u
, unsigned int events
)
247 struct event_socket
*ev
= container_of(u
, struct event_socket
, uloop
);
248 struct sockaddr_nl nla
;
249 unsigned char *buf
= NULL
;
252 while ((size
= nl_recv(ev
->sock
, &nla
, &buf
, NULL
)) > 0) {
254 handle_hotplug_msg((char *) buf
, size
);
260 static int system_rtnl_call(struct nl_msg
*msg
)
264 ret
= nl_send_auto_complete(sock_rtnl
, msg
);
270 return nl_wait_for_ack(sock_rtnl
);
273 int system_bridge_delbr(struct device
*bridge
)
275 return ioctl(sock_ioctl
, SIOCBRDELBR
, bridge
->ifname
);
278 static int system_bridge_if(const char *bridge
, struct device
*dev
, int cmd
, void *data
)
282 memset(&ifr
, 0, sizeof(ifr
));
284 ifr
.ifr_ifindex
= dev
->ifindex
;
287 strncpy(ifr
.ifr_name
, bridge
, sizeof(ifr
.ifr_name
));
288 return ioctl(sock_ioctl
, cmd
, &ifr
);
291 static bool system_is_bridge(const char *name
, char *buf
, int buflen
)
295 snprintf(buf
, buflen
, "/sys/devices/virtual/net/%s/bridge", name
);
296 if (stat(buf
, &st
) < 0)
302 static char *system_get_bridge(const char *name
, char *buf
, int buflen
)
308 snprintf(buf
, buflen
, "/sys/devices/virtual/net/*/brif/%s/bridge", name
);
309 if (glob(buf
, GLOB_NOSORT
, NULL
, &gl
) < 0)
312 if (gl
.gl_pathc
== 0)
315 len
= readlink(gl
.gl_pathv
[0], buf
, buflen
);
320 path
= strrchr(buf
, '/');
327 int system_bridge_addif(struct device
*bridge
, struct device
*dev
)
331 system_set_disable_ipv6(dev
, "1");
332 oldbr
= system_get_bridge(dev
->ifname
, dev_buf
, sizeof(dev_buf
));
333 if (oldbr
&& !strcmp(oldbr
, bridge
->ifname
))
336 return system_bridge_if(bridge
->ifname
, dev
, SIOCBRADDIF
, NULL
);
339 int system_bridge_delif(struct device
*bridge
, struct device
*dev
)
341 system_set_disable_ipv6(dev
, "0");
342 return system_bridge_if(bridge
->ifname
, dev
, SIOCBRDELIF
, NULL
);
345 static int system_if_resolve(struct device
*dev
)
348 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
349 if (!ioctl(sock_ioctl
, SIOCGIFINDEX
, &ifr
))
350 return ifr
.ifr_ifindex
;
355 static int system_if_flags(const char *ifname
, unsigned add
, unsigned rem
)
359 memset(&ifr
, 0, sizeof(ifr
));
360 strncpy(ifr
.ifr_name
, ifname
, sizeof(ifr
.ifr_name
));
361 ioctl(sock_ioctl
, SIOCGIFFLAGS
, &ifr
);
362 ifr
.ifr_flags
|= add
;
363 ifr
.ifr_flags
&= ~rem
;
364 return ioctl(sock_ioctl
, SIOCSIFFLAGS
, &ifr
);
376 static bool check_ifaddr(struct nlmsghdr
*hdr
, int ifindex
)
378 struct ifaddrmsg
*ifa
= NLMSG_DATA(hdr
);
380 return ifa
->ifa_index
== ifindex
;
383 static bool check_route(struct nlmsghdr
*hdr
, int ifindex
)
385 struct rtmsg
*r
= NLMSG_DATA(hdr
);
386 struct nlattr
*tb
[__RTA_MAX
];
388 if (r
->rtm_protocol
== RTPROT_KERNEL
&&
389 r
->rtm_family
== AF_INET6
)
392 nlmsg_parse(hdr
, sizeof(struct rtmsg
), tb
, __RTA_MAX
- 1, NULL
);
396 return *(int *)RTA_DATA(tb
[RTA_OIF
]) == ifindex
;
399 static int cb_clear_event(struct nl_msg
*msg
, void *arg
)
401 struct clear_data
*clr
= arg
;
402 struct nlmsghdr
*hdr
= nlmsg_hdr(msg
);
403 bool (*cb
)(struct nlmsghdr
*, int ifindex
);
409 if (hdr
->nlmsg_type
!= RTM_NEWADDR
)
416 if (hdr
->nlmsg_type
!= RTM_NEWROUTE
)
425 if (!cb(hdr
, clr
->dev
->ifindex
))
428 D(SYSTEM
, "Remove %s from device %s\n",
429 type
== RTM_DELADDR
? "an address" : "a route",
431 memcpy(nlmsg_hdr(clr
->msg
), hdr
, hdr
->nlmsg_len
);
432 hdr
= nlmsg_hdr(clr
->msg
);
433 hdr
->nlmsg_type
= type
;
434 hdr
->nlmsg_flags
= NLM_F_REQUEST
;
436 if (!nl_send_auto_complete(sock_rtnl
, clr
->msg
))
437 nl_wait_for_ack(sock_rtnl
);
443 cb_finish_event(struct nl_msg
*msg
, void *arg
)
451 error_handler(struct sockaddr_nl
*nla
, struct nlmsgerr
*err
, void *arg
)
454 *pending
= err
->error
;
459 system_if_clear_entries(struct device
*dev
, int type
, int af
)
461 struct clear_data clr
;
462 struct nl_cb
*cb
= nl_cb_alloc(NL_CB_DEFAULT
);
465 .rtm_flags
= RTM_F_CLONED
,
467 int flags
= NLM_F_DUMP
;
475 clr
.size
= sizeof(struct rtgenmsg
);
478 clr
.size
= sizeof(struct rtmsg
);
487 clr
.msg
= nlmsg_alloc_simple(type
, flags
);
491 nlmsg_append(clr
.msg
, &rtm
, clr
.size
, 0);
492 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb_clear_event
, &clr
);
493 nl_cb_set(cb
, NL_CB_FINISH
, NL_CB_CUSTOM
, cb_finish_event
, &pending
);
494 nl_cb_err(cb
, NL_CB_CUSTOM
, error_handler
, &pending
);
496 nl_send_auto_complete(sock_rtnl
, clr
.msg
);
498 nl_recvmsgs(sock_rtnl
, cb
);
506 * Clear bridge (membership) state and bring down device
508 void system_if_clear_state(struct device
*dev
)
510 static char buf
[256];
516 dev
->ifindex
= system_if_resolve(dev
);
520 system_if_flags(dev
->ifname
, 0, IFF_UP
);
522 if (system_is_bridge(dev
->ifname
, buf
, sizeof(buf
))) {
523 D(SYSTEM
, "Delete existing bridge named '%s'\n", dev
->ifname
);
524 system_bridge_delbr(dev
);
528 bridge
= system_get_bridge(dev
->ifname
, buf
, sizeof(buf
));
530 D(SYSTEM
, "Remove device '%s' from bridge '%s'\n", dev
->ifname
, bridge
);
531 system_bridge_if(bridge
, dev
, SIOCBRDELIF
, NULL
);
534 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET
);
535 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET
);
536 system_if_clear_entries(dev
, RTM_GETROUTE
, AF_INET6
);
537 system_if_clear_entries(dev
, RTM_GETADDR
, AF_INET6
);
538 system_set_disable_ipv6(dev
, "0");
541 static inline unsigned long
542 sec_to_jiffies(int val
)
544 return (unsigned long) val
* 100;
547 int system_bridge_addbr(struct device
*bridge
, struct bridge_config
*cfg
)
549 unsigned long args
[4] = {};
551 if (ioctl(sock_ioctl
, SIOCBRADDBR
, bridge
->ifname
) < 0)
554 args
[0] = BRCTL_SET_BRIDGE_STP_STATE
;
555 args
[1] = !!cfg
->stp
;
556 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
558 args
[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY
;
559 args
[1] = sec_to_jiffies(cfg
->forward_delay
);
560 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
562 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
563 bridge
->ifname
, cfg
->igmp_snoop
? "1" : "0");
565 if (cfg
->flags
& BRIDGE_OPT_AGEING_TIME
) {
566 args
[0] = BRCTL_SET_AGEING_TIME
;
567 args
[1] = sec_to_jiffies(cfg
->ageing_time
);
568 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
571 if (cfg
->flags
& BRIDGE_OPT_HELLO_TIME
) {
572 args
[0] = BRCTL_SET_BRIDGE_HELLO_TIME
;
573 args
[1] = sec_to_jiffies(cfg
->hello_time
);
574 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
577 if (cfg
->flags
& BRIDGE_OPT_MAX_AGE
) {
578 args
[0] = BRCTL_SET_BRIDGE_MAX_AGE
;
579 args
[1] = sec_to_jiffies(cfg
->max_age
);
580 system_bridge_if(bridge
->ifname
, NULL
, SIOCDEVPRIVATE
, &args
);
586 static int system_vlan(struct device
*dev
, int id
)
588 struct vlan_ioctl_args ifr
= {
589 .cmd
= SET_VLAN_NAME_TYPE_CMD
,
590 .u
.name_type
= VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD
,
593 ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
596 ifr
.cmd
= DEL_VLAN_CMD
;
599 ifr
.cmd
= ADD_VLAN_CMD
;
602 strncpy(ifr
.device1
, dev
->ifname
, sizeof(ifr
.device1
));
603 return ioctl(sock_ioctl
, SIOCSIFVLAN
, &ifr
);
606 int system_vlan_add(struct device
*dev
, int id
)
608 return system_vlan(dev
, id
);
611 int system_vlan_del(struct device
*dev
)
613 return system_vlan(dev
, -1);
617 system_if_get_settings(struct device
*dev
, struct device_settings
*s
)
621 memset(&ifr
, 0, sizeof(ifr
));
622 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
624 if (ioctl(sock_ioctl
, SIOCGIFMTU
, &ifr
) == 0) {
625 s
->mtu
= ifr
.ifr_mtu
;
626 s
->flags
|= DEV_OPT_MTU
;
629 if (ioctl(sock_ioctl
, SIOCGIFTXQLEN
, &ifr
) == 0) {
630 s
->txqueuelen
= ifr
.ifr_qlen
;
631 s
->flags
|= DEV_OPT_TXQUEUELEN
;
634 if (ioctl(sock_ioctl
, SIOCGIFHWADDR
, &ifr
) == 0) {
635 memcpy(s
->macaddr
, &ifr
.ifr_hwaddr
.sa_data
, sizeof(s
->macaddr
));
636 s
->flags
|= DEV_OPT_MACADDR
;
641 system_if_apply_settings(struct device
*dev
, struct device_settings
*s
)
645 memset(&ifr
, 0, sizeof(ifr
));
646 strncpy(ifr
.ifr_name
, dev
->ifname
, sizeof(ifr
.ifr_name
));
647 if (s
->flags
& DEV_OPT_MTU
) {
648 ifr
.ifr_mtu
= s
->mtu
;
649 if (ioctl(sock_ioctl
, SIOCSIFMTU
, &ifr
) < 0)
650 s
->flags
&= ~DEV_OPT_MTU
;
652 if (s
->flags
& DEV_OPT_TXQUEUELEN
) {
653 ifr
.ifr_qlen
= s
->txqueuelen
;
654 if (ioctl(sock_ioctl
, SIOCSIFTXQLEN
, &ifr
) < 0)
655 s
->flags
&= ~DEV_OPT_TXQUEUELEN
;
657 if ((s
->flags
& DEV_OPT_MACADDR
) && !dev
->external
) {
658 ifr
.ifr_hwaddr
.sa_family
= ARPHRD_ETHER
;
659 memcpy(&ifr
.ifr_hwaddr
.sa_data
, s
->macaddr
, sizeof(s
->macaddr
));
660 if (ioctl(sock_ioctl
, SIOCSIFHWADDR
, &ifr
) < 0)
661 s
->flags
&= ~DEV_OPT_MACADDR
;
665 int system_if_up(struct device
*dev
)
667 system_if_get_settings(dev
, &dev
->orig_settings
);
668 system_if_apply_settings(dev
, &dev
->settings
);
669 dev
->ifindex
= system_if_resolve(dev
);
670 return system_if_flags(dev
->ifname
, IFF_UP
, 0);
673 int system_if_down(struct device
*dev
)
675 int ret
= system_if_flags(dev
->ifname
, 0, IFF_UP
);
676 dev
->orig_settings
.flags
&= dev
->settings
.flags
;
677 system_if_apply_settings(dev
, &dev
->orig_settings
);
681 int system_if_check(struct device
*dev
)
683 device_set_present(dev
, (system_if_resolve(dev
) > 0));
688 system_if_get_parent(struct device
*dev
)
690 char buf
[64], *devname
;
691 int ifindex
, iflink
, len
;
694 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/iflink", dev
->ifname
);
699 len
= fread(buf
, 1, sizeof(buf
) - 1, f
);
706 iflink
= strtoul(buf
, NULL
, 0);
707 ifindex
= system_if_resolve(dev
);
708 if (!iflink
|| iflink
== ifindex
)
711 devname
= if_indextoname(iflink
, buf
);
715 return device_get(devname
, true);
719 read_string_file(int dir_fd
, const char *file
, char *buf
, int len
)
725 fd
= openat(dir_fd
, file
, O_RDONLY
);
730 len
= read(fd
, buf
, len
- 1);
734 } else if (len
> 0) {
737 c
= strchr(buf
, '\n');
750 read_uint64_file(int dir_fd
, const char *file
, uint64_t *val
)
755 ret
= read_string_file(dir_fd
, file
, buf
, sizeof(buf
));
757 *val
= strtoull(buf
, NULL
, 0);
762 /* Assume advertised flags == supported flags */
763 static const struct {
766 } ethtool_link_modes
[] = {
767 { ADVERTISED_10baseT_Half
, "10H" },
768 { ADVERTISED_10baseT_Full
, "10F" },
769 { ADVERTISED_100baseT_Half
, "100H" },
770 { ADVERTISED_100baseT_Full
, "100F" },
771 { ADVERTISED_1000baseT_Half
, "1000H" },
772 { ADVERTISED_1000baseT_Full
, "1000F" },
775 static void system_add_link_modes(struct blob_buf
*b
, __u32 mask
)
778 for (i
= 0; i
< ARRAY_SIZE(ethtool_link_modes
); i
++) {
779 if (mask
& ethtool_link_modes
[i
].mask
)
780 blobmsg_add_string(b
, NULL
, ethtool_link_modes
[i
].name
);
785 system_if_force_external(const char *ifname
)
790 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/phy80211", ifname
);
791 return stat(buf
, &s
) == 0;
795 system_if_dump_info(struct device
*dev
, struct blob_buf
*b
)
797 struct ethtool_cmd ecmd
;
804 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s", dev
->ifname
);
805 dir_fd
= open(buf
, O_DIRECTORY
);
807 if (read_uint64_file(dir_fd
, "carrier", &val
))
808 blobmsg_add_u8(b
, "link", !!val
);
810 memset(&ecmd
, 0, sizeof(ecmd
));
811 memset(&ifr
, 0, sizeof(ifr
));
812 strcpy(ifr
.ifr_name
, dev
->ifname
);
813 ifr
.ifr_data
= (caddr_t
) &ecmd
;
814 ecmd
.cmd
= ETHTOOL_GSET
;
816 if (ioctl(sock_ioctl
, SIOCETHTOOL
, &ifr
) == 0) {
817 c
= blobmsg_open_array(b
, "link-advertising");
818 system_add_link_modes(b
, ecmd
.advertising
);
819 blobmsg_close_array(b
, c
);
821 c
= blobmsg_open_array(b
, "link-supported");
822 system_add_link_modes(b
, ecmd
.supported
);
823 blobmsg_close_array(b
, c
);
825 s
= blobmsg_alloc_string_buffer(b
, "speed", 8);
826 snprintf(s
, 8, "%d%c", ethtool_cmd_speed(&ecmd
),
827 ecmd
.duplex
== DUPLEX_HALF
? 'H' : 'F');
828 blobmsg_add_string_buffer(b
);
836 system_if_dump_stats(struct device
*dev
, struct blob_buf
*b
)
838 const char *const counters
[] = {
839 "collisions", "rx_frame_errors", "tx_compressed",
840 "multicast", "rx_length_errors", "tx_dropped",
841 "rx_bytes", "rx_missed_errors", "tx_errors",
842 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
843 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
844 "rx_dropped", "tx_aborted_errors", "tx_packets",
845 "rx_errors", "tx_bytes", "tx_window_errors",
846 "rx_fifo_errors", "tx_carrier_errors",
853 snprintf(buf
, sizeof(buf
), "/sys/class/net/%s/statistics", dev
->ifname
);
854 stats_dir
= open(buf
, O_DIRECTORY
);
858 for (i
= 0; i
< ARRAY_SIZE(counters
); i
++)
859 if (read_uint64_file(stats_dir
, counters
[i
], &val
))
860 blobmsg_add_u64(b
, counters
[i
], val
);
866 static int system_addr(struct device
*dev
, struct device_addr
*addr
, int cmd
)
868 bool v4
= ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
);
869 int alen
= v4
? 4 : 16;
870 unsigned int flags
= 0;
871 struct ifaddrmsg ifa
= {
872 .ifa_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
873 .ifa_prefixlen
= addr
->mask
,
874 .ifa_index
= dev
->ifindex
,
878 if (cmd
== RTM_NEWADDR
)
879 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
881 msg
= nlmsg_alloc_simple(cmd
, flags
);
885 nlmsg_append(msg
, &ifa
, sizeof(ifa
), 0);
886 nla_put(msg
, IFA_LOCAL
, alen
, &addr
->addr
);
889 nla_put_u32(msg
, IFA_BROADCAST
, addr
->broadcast
);
890 if (addr
->point_to_point
)
891 nla_put_u32(msg
, IFA_ADDRESS
, addr
->point_to_point
);
893 time_t now
= system_get_rtime();
894 struct ifa_cacheinfo cinfo
= {0xffffffffU
, 0xffffffffU
, 0, 0};
896 if (addr
->preferred_until
) {
897 int preferred
= addr
->preferred_until
- now
;
901 cinfo
.ifa_prefered
= preferred
;
904 if (addr
->valid_until
) {
905 int valid
= addr
->valid_until
- now
;
909 cinfo
.ifa_valid
= valid
;
912 nla_put(msg
, IFA_CACHEINFO
, sizeof(cinfo
), &cinfo
);
915 return system_rtnl_call(msg
);
918 int system_add_address(struct device
*dev
, struct device_addr
*addr
)
920 return system_addr(dev
, addr
, RTM_NEWADDR
);
923 int system_del_address(struct device
*dev
, struct device_addr
*addr
)
925 return system_addr(dev
, addr
, RTM_DELADDR
);
928 static int system_rt(struct device
*dev
, struct device_route
*route
, int cmd
)
930 int alen
= ((route
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
) ? 4 : 16;
932 unsigned int flags
= 0;
935 have_gw
= !!route
->nexthop
.in
.s_addr
;
937 have_gw
= route
->nexthop
.in6
.s6_addr32
[0] ||
938 route
->nexthop
.in6
.s6_addr32
[1] ||
939 route
->nexthop
.in6
.s6_addr32
[2] ||
940 route
->nexthop
.in6
.s6_addr32
[3];
942 unsigned char scope
= (cmd
== RTM_DELROUTE
) ? RT_SCOPE_NOWHERE
:
943 (have_gw
) ? RT_SCOPE_UNIVERSE
: RT_SCOPE_LINK
;
946 .rtm_family
= (alen
== 4) ? AF_INET
: AF_INET6
,
947 .rtm_dst_len
= route
->mask
,
948 .rtm_table
= RT_TABLE_MAIN
,
949 .rtm_protocol
= (route
->flags
& DEVADDR_KERNEL
) ? RTPROT_KERNEL
: RTPROT_STATIC
,
951 .rtm_type
= (cmd
== RTM_DELROUTE
) ? 0: RTN_UNICAST
,
955 if (cmd
== RTM_NEWROUTE
) {
956 flags
|= NLM_F_CREATE
| NLM_F_REPLACE
;
958 if (!dev
) { // Add null-route
959 rtm
.rtm_scope
= RT_SCOPE_UNIVERSE
;
960 rtm
.rtm_type
= RTN_UNREACHABLE
;
964 msg
= nlmsg_alloc_simple(cmd
, flags
);
968 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
971 nla_put(msg
, RTA_DST
, alen
, &route
->addr
);
973 if (route
->metric
> 0)
974 nla_put_u32(msg
, RTA_PRIORITY
, route
->metric
);
977 nla_put(msg
, RTA_GATEWAY
, alen
, &route
->nexthop
);
980 nla_put_u32(msg
, RTA_OIF
, dev
->ifindex
);
982 return system_rtnl_call(msg
);
985 int system_add_route(struct device
*dev
, struct device_route
*route
)
987 return system_rt(dev
, route
, RTM_NEWROUTE
);
990 int system_del_route(struct device
*dev
, struct device_route
*route
)
992 return system_rt(dev
, route
, RTM_DELROUTE
);
995 int system_flush_routes(void)
997 const char *names
[] = {
998 "/proc/sys/net/ipv4/route/flush",
999 "/proc/sys/net/ipv6/route/flush"
1003 for (i
= 0; i
< ARRAY_SIZE(names
); i
++) {
1004 fd
= open(names
[i
], O_WRONLY
);
1014 time_t system_get_rtime(void)
1019 if (syscall(__NR_clock_gettime
, CLOCK_MONOTONIC
, &ts
) == 0)
1022 if (gettimeofday(&tv
, NULL
) == 0)
1029 #define IP_DF 0x4000
1032 static void tunnel_parm_init(struct ip_tunnel_parm
*p
)
1034 memset(p
, 0, sizeof(*p
));
1037 p
->iph
.frag_off
= htons(IP_DF
);
1040 static int tunnel_ioctl(const char *name
, int cmd
, void *p
)
1044 memset(&ifr
, 0, sizeof(ifr
));
1045 strncpy(ifr
.ifr_name
, name
, sizeof(ifr
.ifr_name
));
1046 ifr
.ifr_ifru
.ifru_data
= p
;
1047 return ioctl(sock_ioctl
, cmd
, &ifr
);
1050 int system_del_ip_tunnel(const char *name
)
1052 struct ip_tunnel_parm p
;
1054 tunnel_parm_init(&p
);
1055 return tunnel_ioctl(name
, SIOCDELTUNNEL
, &p
);
1058 int system_update_ipv6_mtu(struct device
*dev
, int mtu
)
1062 snprintf(buf
, sizeof(buf
), "/proc/sys/net/ipv6/conf/%s/mtu",
1065 int fd
= open(buf
, O_RDWR
);
1066 ssize_t len
= read(fd
, buf
, sizeof(buf
) - 1);
1073 if (!mtu
|| ret
<= mtu
)
1076 lseek(fd
, 0, SEEK_SET
);
1077 if (write(fd
, buf
, snprintf(buf
, sizeof(buf
), "%i", mtu
)) <= 0)
1085 static int parse_ipaddr(struct blob_attr
*attr
, __be32
*addr
)
1090 return inet_pton(AF_INET
, blobmsg_data(attr
), (void *) addr
);
1094 int system_add_ip_tunnel(const char *name
, struct blob_attr
*attr
)
1096 struct blob_attr
*tb
[__TUNNEL_ATTR_MAX
];
1097 struct blob_attr
*cur
;
1098 struct ip_tunnel_parm p
;
1099 const char *base
, *str
;
1102 system_del_ip_tunnel(name
);
1104 tunnel_parm_init(&p
);
1106 blobmsg_parse(tunnel_attr_list
.params
, __TUNNEL_ATTR_MAX
, tb
,
1107 blob_data(attr
), blob_len(attr
));
1109 if (!(cur
= tb
[TUNNEL_ATTR_TYPE
]))
1111 str
= blobmsg_data(cur
);
1112 is_sit
= !strcmp(str
, "sit");
1115 p
.iph
.protocol
= IPPROTO_IPV6
;
1120 if (!parse_ipaddr(tb
[TUNNEL_ATTR_LOCAL
], &p
.iph
.saddr
))
1123 if (!parse_ipaddr(tb
[TUNNEL_ATTR_REMOTE
], &p
.iph
.daddr
))
1126 if ((cur
= tb
[TUNNEL_ATTR_TTL
])) {
1127 unsigned int val
= blobmsg_get_u32(cur
);
1135 strncpy(p
.name
, name
, sizeof(p
.name
));
1136 if (tunnel_ioctl(base
, SIOCADDTUNNEL
, &p
) < 0)
1140 cur
= tb
[TUNNEL_ATTR_6RD_PREFIX
];
1141 if (cur
&& is_sit
) {
1143 struct ip_tunnel_6rd p6
;
1145 memset(&p6
, 0, sizeof(p6
));
1147 if (!parse_ip_and_netmask(AF_INET6
, blobmsg_data(cur
),
1148 &p6
.prefix
, &mask
) || mask
> 128)
1150 p6
.prefixlen
= mask
;
1152 if ((cur
= tb
[TUNNEL_ATTR_6RD_RELAY_PREFIX
])) {
1153 if (!parse_ip_and_netmask(AF_INET
, blobmsg_data(cur
),
1154 &p6
.relay_prefix
, &mask
) || mask
> 32)
1156 p6
.relay_prefixlen
= mask
;
1159 if (tunnel_ioctl(name
, SIOCADD6RD
, &p6
) < 0) {
1160 system_del_ip_tunnel(name
);