+/*
+ * netifd - network interface daemon
+ * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
+ * Copyright (C) 2013 Steven Barth <steven@midlink.org>
+ * Copyright (C) 2014 Gioacchino Mazzurco <gio@eigenlab.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#define _GNU_SOURCE
+
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
+#include <sys/syscall.h>
+
+#include <net/if.h>
+#include <net/if_arp.h>
+
+#include <arpa/inet.h>
+#include <netinet/in.h>
#include <linux/rtnetlink.h>
#include <linux/sockios.h>
+#include <linux/ip.h>
+#include <linux/if_link.h>
#include <linux/if_vlan.h>
#include <linux/if_bridge.h>
+#include <linux/if_tunnel.h>
+#include <linux/ip6_tunnel.h>
+#include <linux/ethtool.h>
+#include <linux/fib_rules.h>
+#include <linux/version.h>
+
+#ifndef RTN_FAILED_POLICY
+#define RTN_FAILED_POLICY 12
+#endif
-#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <glob.h>
+#include <time.h>
#include <netlink/msg.h>
#include <netlink/attr.h>
#include "device.h"
#include "system.h"
+struct event_socket {
+ struct uloop_fd uloop;
+ struct nl_sock *sock;
+ int bufsize;
+};
+
static int sock_ioctl = -1;
static struct nl_sock *sock_rtnl = NULL;
-static struct nl_sock *sock_rtnl_event = NULL;
-static void handler_rtnl_event(struct uloop_fd *u, unsigned int events);
static int cb_rtnl_event(struct nl_msg *msg, void *arg);
-static struct uloop_fd rtnl_event = {.cb = handler_rtnl_event};
-static struct nl_cb *nl_cb_rtnl_event;
+static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
+
+static char dev_buf[256];
+
+static void
+handler_nl_event(struct uloop_fd *u, unsigned int events)
+{
+ struct event_socket *ev = container_of(u, struct event_socket, uloop);
+ int err;
+ socklen_t errlen = sizeof(err);
+
+ if (!u->error) {
+ nl_recvmsgs_default(ev->sock);
+ return;
+ }
+
+ if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
+ goto abort;
+
+ switch(err) {
+ case ENOBUFS:
+ // Increase rx buffer size on netlink socket
+ ev->bufsize *= 2;
+ if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
+ goto abort;
+
+ // Request full dump since some info got dropped
+ struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
+ nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
+ break;
+
+ default:
+ goto abort;
+ }
+ u->error = false;
+ return;
+
+abort:
+ uloop_fd_delete(&ev->uloop);
+ return;
+}
+
+static struct nl_sock *
+create_socket(int protocol, int groups)
+{
+ struct nl_sock *sock;
+
+ sock = nl_socket_alloc();
+ if (!sock)
+ return NULL;
+
+ if (groups)
+ nl_join_groups(sock, groups);
+
+ if (nl_connect(sock, protocol))
+ return NULL;
+
+ return sock;
+}
+
+static bool
+create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
+ uloop_fd_handler cb, int flags)
+{
+ ev->sock = create_socket(protocol, groups);
+ if (!ev->sock)
+ return false;
+
+ ev->uloop.fd = nl_socket_get_fd(ev->sock);
+ ev->uloop.cb = cb;
+ if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
+ return false;
+
+ return true;
+}
+
+static bool
+create_event_socket(struct event_socket *ev, int protocol,
+ int (*cb)(struct nl_msg *msg, void *arg))
+{
+ if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
+ return false;
+
+ // Install the valid custom callback handler
+ nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
+
+ // Disable sequence number checking on event sockets
+ nl_socket_disable_seq_check(ev->sock);
+
+ // Increase rx buffer size to 65K on event sockets
+ ev->bufsize = 65535;
+ if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
+ return false;
+
+ return true;
+}
+
+static bool
+system_rtn_aton(const char *src, unsigned int *dst)
+{
+ char *e;
+ unsigned int n;
+
+ if (!strcmp(src, "local"))
+ n = RTN_LOCAL;
+ else if (!strcmp(src, "nat"))
+ n = RTN_NAT;
+ else if (!strcmp(src, "broadcast"))
+ n = RTN_BROADCAST;
+ else if (!strcmp(src, "anycast"))
+ n = RTN_ANYCAST;
+ else if (!strcmp(src, "multicast"))
+ n = RTN_MULTICAST;
+ else if (!strcmp(src, "prohibit"))
+ n = RTN_PROHIBIT;
+ else if (!strcmp(src, "unreachable"))
+ n = RTN_UNREACHABLE;
+ else if (!strcmp(src, "blackhole"))
+ n = RTN_BLACKHOLE;
+ else if (!strcmp(src, "xresolve"))
+ n = RTN_XRESOLVE;
+ else if (!strcmp(src, "unicast"))
+ n = RTN_UNICAST;
+ else if (!strcmp(src, "throw"))
+ n = RTN_THROW;
+ else if (!strcmp(src, "failed_policy"))
+ n = RTN_FAILED_POLICY;
+ else {
+ n = strtoul(src, &e, 0);
+ if (!e || *e || e == src || n > 255)
+ return false;
+ }
+
+ *dst = n;
+ return true;
+}
int system_init(void)
{
+ static struct event_socket rtnl_event;
+ static struct event_socket hotplug_event;
+
sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
- fcntl(sock_ioctl, F_SETFD, fcntl(sock_ioctl, F_GETFD) | FD_CLOEXEC);
+ system_fd_set_cloexec(sock_ioctl);
// Prepare socket for routing / address control
- sock_rtnl = nl_socket_alloc();
+ sock_rtnl = create_socket(NETLINK_ROUTE, 0);
if (!sock_rtnl)
return -1;
- if (nl_connect(sock_rtnl, NETLINK_ROUTE))
- goto error_free_sock;
+ if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
+ return -1;
- // Prepare socket for link events
- nl_cb_rtnl_event = nl_cb_alloc(NL_CB_DEFAULT);
- if (!nl_cb_rtnl_event)
- goto error_free_sock;
+ if (!create_raw_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT, 1,
+ handle_hotplug_event, 0))
+ return -1;
- nl_cb_set(nl_cb_rtnl_event, NL_CB_VALID, NL_CB_CUSTOM,
- cb_rtnl_event, NULL);
+ // Receive network link events form kernel
+ nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
- sock_rtnl_event = nl_socket_alloc();
- if (!sock_rtnl_event)
- goto error_free_cb;
+ return 0;
+}
- if (nl_connect(sock_rtnl_event, NETLINK_ROUTE))
- goto error_free_event;
+static void system_set_sysctl(const char *path, const char *val)
+{
+ int fd;
- // Receive network link events form kernel
- nl_socket_add_membership(sock_rtnl_event, RTNLGRP_LINK);
+ fd = open(path, O_WRONLY);
+ if (fd < 0)
+ return;
- rtnl_event.fd = nl_socket_get_fd(sock_rtnl_event);
- uloop_fd_add(&rtnl_event, ULOOP_READ | ULOOP_EDGE_TRIGGER);
+ if (write(fd, val, strlen(val))) {}
+ close(fd);
+}
- return 0;
+static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
+{
+ snprintf(dev_buf, sizeof(dev_buf), path, device);
+ system_set_sysctl(dev_buf, val);
+}
-error_free_event:
- nl_socket_free(sock_rtnl_event);
- sock_rtnl_event = NULL;
-error_free_cb:
- nl_cb_put(nl_cb_rtnl_event);
- nl_cb_rtnl_event = NULL;
-error_free_sock:
- nl_socket_free(sock_rtnl);
- sock_rtnl = NULL;
- return -1;
+static void system_set_disable_ipv6(struct device *dev, const char *val)
+{
+ system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
}
-// If socket is ready for reading parse netlink events
-static void handler_rtnl_event(struct uloop_fd *u, unsigned int events)
+static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
{
- nl_recvmsgs(sock_rtnl_event, nl_cb_rtnl_event);
+ int fd = -1, ret = -1;
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0)
+ goto out;
+
+ ssize_t len = read(fd, buf, buf_sz - 1);
+ if (len < 0)
+ goto out;
+
+ ret = buf[len] = 0;
+
+out:
+ if (fd >= 0)
+ close(fd);
+
+ return ret;
}
+static int
+system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
+{
+ snprintf(dev_buf, sizeof(dev_buf), path, device);
+ return system_get_sysctl(dev_buf, buf, buf_sz);
+}
+
+static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
+{
+ return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
+ dev->ifname, buf, buf_sz);
+}
+
+#ifndef IFF_LOWER_UP
+#define IFF_LOWER_UP 0x10000
+#endif
+
// Evaluate netlink messages
static int cb_rtnl_event(struct nl_msg *msg, void *arg)
{
struct ifinfomsg *ifi = NLMSG_DATA(nh);
struct nlattr *nla[__IFLA_MAX];
- if (nh->nlmsg_type != RTM_DELLINK && nh->nlmsg_type != RTM_NEWLINK)
+ if (nh->nlmsg_type != RTM_NEWLINK)
goto out;
nlmsg_parse(nh, sizeof(*ifi), nla, __IFLA_MAX - 1, NULL);
if (!nla[IFLA_IFNAME])
goto out;
- struct device *dev = device_get(RTA_DATA(nla[IFLA_IFNAME]), false);
+ struct device *dev = device_get(nla_data(nla[IFLA_IFNAME]), false);
if (!dev)
goto out;
- dev->ifindex = ifi->ifi_index;
- device_set_present(dev, (nh->nlmsg_type == RTM_NEWLINK));
+ device_set_ifindex(dev, ifi->ifi_index);
+ device_set_link(dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
out:
return 0;
}
+static void
+handle_hotplug_msg(char *data, int size)
+{
+ const char *subsystem = NULL, *interface = NULL;
+ char *cur, *end, *sep;
+ struct device *dev;
+ int skip;
+ bool add;
+
+ if (!strncmp(data, "add@", 4))
+ add = true;
+ else if (!strncmp(data, "remove@", 7))
+ add = false;
+ else
+ return;
+
+ skip = strlen(data) + 1;
+ end = data + size;
+
+ for (cur = data + skip; cur < end; cur += skip) {
+ skip = strlen(cur) + 1;
+
+ sep = strchr(cur, '=');
+ if (!sep)
+ continue;
+
+ *sep = 0;
+ if (!strcmp(cur, "INTERFACE"))
+ interface = sep + 1;
+ else if (!strcmp(cur, "SUBSYSTEM")) {
+ subsystem = sep + 1;
+ if (strcmp(subsystem, "net") != 0)
+ return;
+ }
+ if (subsystem && interface)
+ goto found;
+ }
+ return;
+
+found:
+ dev = device_get(interface, false);
+ if (!dev)
+ return;
+
+ if (dev->type != &simple_device_type)
+ return;
+
+ if (add && system_if_force_external(dev->ifname))
+ return;
+
+ device_set_present(dev, add);
+}
+
+static void
+handle_hotplug_event(struct uloop_fd *u, unsigned int events)
+{
+ struct event_socket *ev = container_of(u, struct event_socket, uloop);
+ struct sockaddr_nl nla;
+ unsigned char *buf = NULL;
+ int size;
+
+ while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
+ if (nla.nl_pid == 0)
+ handle_hotplug_msg((char *) buf, size);
+
+ free(buf);
+ }
+}
+
static int system_rtnl_call(struct nl_msg *msg)
{
- int s = -(nl_send_auto_complete(sock_rtnl, msg)
- || nl_wait_for_ack(sock_rtnl));
+ int ret;
+
+ ret = nl_send_auto_complete(sock_rtnl, msg);
nlmsg_free(msg);
- return s;
+
+ if (ret < 0)
+ return ret;
+
+ return nl_wait_for_ack(sock_rtnl);
}
int system_bridge_delbr(struct device *bridge)
static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
{
struct ifreq ifr;
+
+ memset(&ifr, 0, sizeof(ifr));
if (dev)
ifr.ifr_ifindex = dev->ifindex;
else
return ioctl(sock_ioctl, cmd, &ifr);
}
-int system_bridge_addif(struct device *bridge, struct device *dev)
-{
- return system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
-}
-
-int system_bridge_delif(struct device *bridge, struct device *dev)
-{
- return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
-}
-
static bool system_is_bridge(const char *name, char *buf, int buflen)
{
struct stat st;
return path + 1;
}
+static void system_bridge_set_wireless(const char *bridge, const char *dev)
+{
+ snprintf(dev_buf, sizeof(dev_buf),
+ "/sys/devices/virtual/net/%s/brif/%s/multicast_to_unicast",
+ bridge, dev);
+ system_set_sysctl(dev_buf, "1");
+}
+
+int system_bridge_addif(struct device *bridge, struct device *dev)
+{
+ char *oldbr;
+ int ret = 0;
+
+ oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
+ if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
+ ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
+
+ if (dev->wireless)
+ system_bridge_set_wireless(bridge->ifname, dev->ifname);
+
+ return ret;
+}
+
+int system_bridge_delif(struct device *bridge, struct device *dev)
+{
+ return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
+}
+
static int system_if_resolve(struct device *dev)
{
struct ifreq ifr;
static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
{
struct ifreq ifr;
+
+ memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr);
ifr.ifr_flags |= add;
return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
}
+struct clear_data {
+ struct nl_msg *msg;
+ struct device *dev;
+ int type;
+ int size;
+ int af;
+};
+
+
+static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
+{
+ struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
+
+ return ifa->ifa_index == ifindex;
+}
+
+static bool check_route(struct nlmsghdr *hdr, int ifindex)
+{
+ struct rtmsg *r = NLMSG_DATA(hdr);
+ struct nlattr *tb[__RTA_MAX];
+
+ if (r->rtm_protocol == RTPROT_KERNEL &&
+ r->rtm_family == AF_INET6)
+ return false;
+
+ nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
+ if (!tb[RTA_OIF])
+ return false;
+
+ return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
+}
+
+static bool check_rule(struct nlmsghdr *hdr, int ifindex)
+{
+ return true;
+}
+
+static int cb_clear_event(struct nl_msg *msg, void *arg)
+{
+ struct clear_data *clr = arg;
+ struct nlmsghdr *hdr = nlmsg_hdr(msg);
+ bool (*cb)(struct nlmsghdr *, int ifindex);
+ int type;
+
+ switch(clr->type) {
+ case RTM_GETADDR:
+ type = RTM_DELADDR;
+ if (hdr->nlmsg_type != RTM_NEWADDR)
+ return NL_SKIP;
+
+ cb = check_ifaddr;
+ break;
+ case RTM_GETROUTE:
+ type = RTM_DELROUTE;
+ if (hdr->nlmsg_type != RTM_NEWROUTE)
+ return NL_SKIP;
+
+ cb = check_route;
+ break;
+ case RTM_GETRULE:
+ type = RTM_DELRULE;
+ if (hdr->nlmsg_type != RTM_NEWRULE)
+ return NL_SKIP;
+
+ cb = check_rule;
+ break;
+ default:
+ return NL_SKIP;
+ }
+
+ if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
+ return NL_SKIP;
+
+ if (type == RTM_DELRULE)
+ D(SYSTEM, "Remove a rule\n");
+ else
+ D(SYSTEM, "Remove %s from device %s\n",
+ type == RTM_DELADDR ? "an address" : "a route",
+ clr->dev->ifname);
+ memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
+ hdr = nlmsg_hdr(clr->msg);
+ hdr->nlmsg_type = type;
+ hdr->nlmsg_flags = NLM_F_REQUEST;
+
+ nl_socket_disable_auto_ack(sock_rtnl);
+ nl_send_auto_complete(sock_rtnl, clr->msg);
+ nl_socket_enable_auto_ack(sock_rtnl);
+
+ return NL_SKIP;
+}
+
+static int
+cb_finish_event(struct nl_msg *msg, void *arg)
+{
+ int *pending = arg;
+ *pending = 0;
+ return NL_STOP;
+}
+
+static int
+error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
+{
+ int *pending = arg;
+ *pending = err->error;
+ return NL_STOP;
+}
+
+static void
+system_if_clear_entries(struct device *dev, int type, int af)
+{
+ struct clear_data clr;
+ struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
+ struct rtmsg rtm = {
+ .rtm_family = af,
+ .rtm_flags = RTM_F_CLONED,
+ };
+ int flags = NLM_F_DUMP;
+ int pending = 1;
+
+ clr.af = af;
+ clr.dev = dev;
+ clr.type = type;
+ switch (type) {
+ case RTM_GETADDR:
+ case RTM_GETRULE:
+ clr.size = sizeof(struct rtgenmsg);
+ break;
+ case RTM_GETROUTE:
+ clr.size = sizeof(struct rtmsg);
+ break;
+ default:
+ return;
+ }
+
+ if (!cb)
+ return;
+
+ clr.msg = nlmsg_alloc_simple(type, flags);
+ if (!clr.msg)
+ goto out;
+
+ nlmsg_append(clr.msg, &rtm, clr.size, 0);
+ nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
+ nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
+ nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
+
+ nl_send_auto_complete(sock_rtnl, clr.msg);
+ while (pending > 0)
+ nl_recvmsgs(sock_rtnl, cb);
+
+ nlmsg_free(clr.msg);
+out:
+ nl_cb_put(cb);
+}
+
/*
* Clear bridge (membership) state and bring down device
*/
void system_if_clear_state(struct device *dev)
{
- char buf[256];
+ static char buf[256];
char *bridge;
- dev->ifindex = system_if_resolve(dev);
- if (!dev->ifindex)
+ device_set_ifindex(dev, system_if_resolve(dev));
+ if (dev->external || !dev->ifindex)
return;
system_if_flags(dev->ifname, 0, IFF_UP);
D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
}
+
+ system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
+ system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
+ system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
+ system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
+ system_set_disable_ipv6(dev, "0");
}
static inline unsigned long
args[1] = sec_to_jiffies(cfg->forward_delay);
system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
+ system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
+ bridge->ifname, cfg->igmp_snoop ? "1" : "0");
+
+ system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
+ bridge->ifname, cfg->igmp_snoop ? "1" : "0");
+
+ args[0] = BRCTL_SET_BRIDGE_PRIORITY;
+ args[1] = cfg->priority;
+ system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
+
if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
args[0] = BRCTL_SET_AGEING_TIME;
args[1] = sec_to_jiffies(cfg->ageing_time);
return 0;
}
+int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
+{
+ struct nl_msg *msg;
+ struct nlattr *linkinfo, *data;
+ struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
+ int ifindex = system_if_resolve(dev);
+ int i, rv;
+ static const struct {
+ const char *name;
+ enum macvlan_mode val;
+ } modes[] = {
+ { "private", MACVLAN_MODE_PRIVATE },
+ { "vepa", MACVLAN_MODE_VEPA },
+ { "bridge", MACVLAN_MODE_BRIDGE },
+ { "passthru", MACVLAN_MODE_PASSTHRU },
+ };
+
+ if (ifindex == 0)
+ return -ENOENT;
+
+ msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
+
+ if (!msg)
+ return -1;
+
+ nlmsg_append(msg, &iim, sizeof(iim), 0);
+
+ if (cfg->flags & MACVLAN_OPT_MACADDR)
+ nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
+ nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
+ nla_put_u32(msg, IFLA_LINK, ifindex);
+
+ if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
+ goto nla_put_failure;
+
+ nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
+
+ if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
+ goto nla_put_failure;
+
+ if (cfg->mode) {
+ for (i = 0; i < ARRAY_SIZE(modes); i++) {
+ if (strcmp(cfg->mode, modes[i].name) != 0)
+ continue;
+
+ nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
+ break;
+ }
+ }
+
+ nla_nest_end(msg, data);
+ nla_nest_end(msg, linkinfo);
+
+ rv = system_rtnl_call(msg);
+ if (rv)
+ D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
+
+ return rv;
+
+nla_put_failure:
+ nlmsg_free(msg);
+ return -ENOMEM;
+}
+
+static int system_link_del(struct device *dev)
+{
+ struct nl_msg *msg;
+ struct ifinfomsg iim = {
+ .ifi_family = AF_UNSPEC,
+ .ifi_index = 0,
+ };
+
+ msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
+
+ if (!msg)
+ return -1;
+
+ nlmsg_append(msg, &iim, sizeof(iim), 0);
+ nla_put_string(msg, IFLA_IFNAME, dev->ifname);
+ return system_rtnl_call(msg);
+}
+
+int system_macvlan_del(struct device *macvlan)
+{
+ return system_link_del(macvlan);
+}
+
static int system_vlan(struct device *dev, int id)
{
struct vlan_ioctl_args ifr = {
return system_vlan(dev, -1);
}
+int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
+{
+ struct nl_msg *msg;
+ struct nlattr *linkinfo, *data;
+ struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
+ int ifindex = system_if_resolve(dev);
+ int rv;
+
+ if (ifindex == 0)
+ return -ENOENT;
+
+ msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
+
+ if (!msg)
+ return -1;
+
+ nlmsg_append(msg, &iim, sizeof(iim), 0);
+ nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
+ nla_put_u32(msg, IFLA_LINK, ifindex);
+
+ if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
+ goto nla_put_failure;
+
+ nla_put_string(msg, IFLA_INFO_KIND, "vlan");
+
+ if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
+ goto nla_put_failure;
+
+ nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
+ nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
+#else
+ if(cfg->proto == VLAN_PROTO_8021AD)
+ 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);
+#endif
+
+ nla_nest_end(msg, data);
+ nla_nest_end(msg, linkinfo);
+
+ rv = system_rtnl_call(msg);
+ if (rv)
+ D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
+
+ return rv;
+
+nla_put_failure:
+ nlmsg_free(msg);
+ return -ENOMEM;
+}
+
+int system_vlandev_del(struct device *vlandev)
+{
+ return system_link_del(vlandev);
+}
+
+static void
+system_if_get_settings(struct device *dev, struct device_settings *s)
+{
+ struct ifreq ifr;
+ char buf[10];
+
+ memset(&ifr, 0, sizeof(ifr));
+ strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
+
+ if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
+ s->mtu = ifr.ifr_mtu;
+ s->flags |= DEV_OPT_MTU;
+ }
+
+ if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
+ s->txqueuelen = ifr.ifr_qlen;
+ s->flags |= DEV_OPT_TXQUEUELEN;
+ }
+
+ if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
+ memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
+ s->flags |= DEV_OPT_MACADDR;
+ }
+
+ if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
+ s->ipv6 = !strtoul(buf, NULL, 0);
+ s->flags |= DEV_OPT_IPV6;
+ }
+}
+
+void
+system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
+{
+ struct ifreq ifr;
+
+ if (!apply_mask)
+ return;
+
+ memset(&ifr, 0, sizeof(ifr));
+ strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
+ if (s->flags & DEV_OPT_MTU & apply_mask) {
+ ifr.ifr_mtu = s->mtu;
+ if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
+ s->flags &= ~DEV_OPT_MTU;
+ }
+ if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
+ ifr.ifr_qlen = s->txqueuelen;
+ if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
+ s->flags &= ~DEV_OPT_TXQUEUELEN;
+ }
+ if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
+ ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
+ memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
+ if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
+ s->flags &= ~DEV_OPT_MACADDR;
+ }
+ if (s->flags & DEV_OPT_IPV6 & apply_mask)
+ system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
+}
+
int system_if_up(struct device *dev)
{
- dev->ifindex = system_if_resolve(dev);
+ system_if_get_settings(dev, &dev->orig_settings);
+ system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
+ device_set_ifindex(dev, system_if_resolve(dev));
return system_if_flags(dev->ifname, IFF_UP, 0);
}
int system_if_down(struct device *dev)
{
- return system_if_flags(dev->ifname, 0, IFF_UP);
+ int ret = system_if_flags(dev->ifname, 0, IFF_UP);
+ dev->orig_settings.flags &= dev->settings.flags;
+ system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
+ return ret;
+}
+
+struct if_check_data {
+ struct device *dev;
+ int pending;
+ int ret;
+};
+
+static int cb_if_check_valid(struct nl_msg *msg, void *arg)
+{
+ struct nlmsghdr *nh = nlmsg_hdr(msg);
+ struct ifinfomsg *ifi = NLMSG_DATA(nh);
+ struct if_check_data *chk = (struct if_check_data *)arg;
+
+ if (nh->nlmsg_type != RTM_NEWLINK)
+ return NL_SKIP;
+
+ device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
+ device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
+
+ return NL_OK;
+}
+
+static int cb_if_check_ack(struct nl_msg *msg, void *arg)
+{
+ struct if_check_data *chk = (struct if_check_data *)arg;
+ chk->pending = 0;
+ return NL_STOP;
+}
+
+static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
+{
+ struct if_check_data *chk = (struct if_check_data *)arg;
+
+ device_set_present(chk->dev, false);
+ device_set_link(chk->dev, false);
+ chk->pending = err->error;
+
+ return NL_STOP;
}
int system_if_check(struct device *dev)
{
- device_set_present(dev, (system_if_resolve(dev) >= 0));
+ struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
+ struct nl_msg *msg;
+ struct ifinfomsg ifi = {
+ .ifi_family = AF_UNSPEC,
+ .ifi_index = 0,
+ };
+ struct if_check_data chk = {
+ .dev = dev,
+ .pending = 1,
+ };
+ int ret = 1;
+
+ msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
+ if (!msg || nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
+ nla_put_string(msg, IFLA_IFNAME, dev->ifname))
+ goto out;
+
+ nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
+ nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
+ nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
+
+ nl_send_auto_complete(sock_rtnl, msg);
+ while (chk.pending > 0)
+ nl_recvmsgs(sock_rtnl, cb);
+
+ nlmsg_free(msg);
+ ret = chk.pending;
+
+out:
+ nl_cb_put(cb);
+ return ret;
+}
+
+struct device *
+system_if_get_parent(struct device *dev)
+{
+ char buf[64], *devname;
+ int ifindex, iflink, len;
+ FILE *f;
+
+ snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
+ f = fopen(buf, "r");
+ if (!f)
+ return NULL;
+
+ len = fread(buf, 1, sizeof(buf) - 1, f);
+ fclose(f);
+
+ if (len <= 0)
+ return NULL;
+
+ buf[len] = 0;
+ iflink = strtoul(buf, NULL, 0);
+ ifindex = system_if_resolve(dev);
+ if (!iflink || iflink == ifindex)
+ return NULL;
+
+ devname = if_indextoname(iflink, buf);
+ if (!devname)
+ return NULL;
+
+ return device_get(devname, true);
+}
+
+static bool
+read_string_file(int dir_fd, const char *file, char *buf, int len)
+{
+ bool ret = false;
+ char *c;
+ int fd;
+
+ fd = openat(dir_fd, file, O_RDONLY);
+ if (fd < 0)
+ return false;
+
+retry:
+ len = read(fd, buf, len - 1);
+ if (len < 0) {
+ if (errno == EINTR)
+ goto retry;
+ } else if (len > 0) {
+ buf[len] = 0;
+
+ c = strchr(buf, '\n');
+ if (c)
+ *c = 0;
+
+ ret = true;
+ }
+
+ close(fd);
+
+ return ret;
+}
+
+static bool
+read_uint64_file(int dir_fd, const char *file, uint64_t *val)
+{
+ char buf[64];
+ bool ret = false;
+
+ ret = read_string_file(dir_fd, file, buf, sizeof(buf));
+ if (ret)
+ *val = strtoull(buf, NULL, 0);
+
+ return ret;
+}
+
+/* Assume advertised flags == supported flags */
+static const struct {
+ uint32_t mask;
+ const char *name;
+} ethtool_link_modes[] = {
+ { ADVERTISED_10baseT_Half, "10H" },
+ { ADVERTISED_10baseT_Full, "10F" },
+ { ADVERTISED_100baseT_Half, "100H" },
+ { ADVERTISED_100baseT_Full, "100F" },
+ { ADVERTISED_1000baseT_Half, "1000H" },
+ { ADVERTISED_1000baseT_Full, "1000F" },
+};
+
+static void system_add_link_modes(struct blob_buf *b, __u32 mask)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
+ if (mask & ethtool_link_modes[i].mask)
+ blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
+ }
+}
+
+bool
+system_if_force_external(const char *ifname)
+{
+ char buf[64];
+ struct stat s;
+
+ snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
+ return stat(buf, &s) == 0;
+}
+
+int
+system_if_dump_info(struct device *dev, struct blob_buf *b)
+{
+ struct ethtool_cmd ecmd;
+ struct ifreq ifr;
+ char buf[64], *s;
+ void *c;
+ int dir_fd;
+
+ snprintf(buf, sizeof(buf), "/sys/class/net/%s", dev->ifname);
+ dir_fd = open(buf, O_DIRECTORY);
+
+ memset(&ecmd, 0, sizeof(ecmd));
+ memset(&ifr, 0, sizeof(ifr));
+ strcpy(ifr.ifr_name, dev->ifname);
+ ifr.ifr_data = (caddr_t) &ecmd;
+ ecmd.cmd = ETHTOOL_GSET;
+
+ if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
+ c = blobmsg_open_array(b, "link-advertising");
+ system_add_link_modes(b, ecmd.advertising);
+ blobmsg_close_array(b, c);
+
+ c = blobmsg_open_array(b, "link-supported");
+ system_add_link_modes(b, ecmd.supported);
+ blobmsg_close_array(b, c);
+
+ s = blobmsg_alloc_string_buffer(b, "speed", 8);
+ snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
+ ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
+ blobmsg_add_string_buffer(b);
+ }
+
+ close(dir_fd);
+ return 0;
+}
+
+int
+system_if_dump_stats(struct device *dev, struct blob_buf *b)
+{
+ const char *const counters[] = {
+ "collisions", "rx_frame_errors", "tx_compressed",
+ "multicast", "rx_length_errors", "tx_dropped",
+ "rx_bytes", "rx_missed_errors", "tx_errors",
+ "rx_compressed", "rx_over_errors", "tx_fifo_errors",
+ "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
+ "rx_dropped", "tx_aborted_errors", "tx_packets",
+ "rx_errors", "tx_bytes", "tx_window_errors",
+ "rx_fifo_errors", "tx_carrier_errors",
+ };
+ char buf[64];
+ int stats_dir;
+ int i;
+ uint64_t val = 0;
+
+ snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
+ stats_dir = open(buf, O_DIRECTORY);
+ if (stats_dir < 0)
+ return -1;
+
+ for (i = 0; i < ARRAY_SIZE(counters); i++)
+ if (read_uint64_file(stats_dir, counters[i], &val))
+ blobmsg_add_u64(b, counters[i], val);
+
+ close(stats_dir);
return 0;
}
static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
{
- int alen = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
+ bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
+ int alen = v4 ? 4 : 16;
+ unsigned int flags = 0;
struct ifaddrmsg ifa = {
.ifa_family = (alen == 4) ? AF_INET : AF_INET6,
.ifa_prefixlen = addr->mask,
.ifa_index = dev->ifindex,
};
- struct nl_msg *msg = nlmsg_alloc_simple(cmd, 0);
+ struct nl_msg *msg;
+ if (cmd == RTM_NEWADDR)
+ flags |= NLM_F_CREATE | NLM_F_REPLACE;
+
+ msg = nlmsg_alloc_simple(cmd, flags);
if (!msg)
return -1;
nlmsg_append(msg, &ifa, sizeof(ifa), 0);
nla_put(msg, IFA_LOCAL, alen, &addr->addr);
+ if (v4) {
+ if (addr->broadcast)
+ nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
+ if (addr->point_to_point)
+ nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
+ } else {
+ time_t now = system_get_rtime();
+ struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
+
+ if (addr->preferred_until) {
+ int64_t preferred = addr->preferred_until - now;
+ if (preferred < 0)
+ preferred = 0;
+ else if (preferred > UINT32_MAX)
+ preferred = UINT32_MAX;
+
+ cinfo.ifa_prefered = preferred;
+ }
+
+ if (addr->valid_until) {
+ int64_t valid = addr->valid_until - now;
+ if (valid <= 0)
+ return -1;
+ else if (valid > UINT32_MAX)
+ valid = UINT32_MAX;
+
+ cinfo.ifa_valid = valid;
+ }
+
+ nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
+ }
+
return system_rtnl_call(msg);
}
{
int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
bool have_gw;
+ unsigned int flags = 0;
if (alen == 4)
have_gw = !!route->nexthop.in.s_addr;
route->nexthop.in6.s6_addr32[2] ||
route->nexthop.in6.s6_addr32[3];
- unsigned char scope = (cmd == RTM_DELROUTE) ? RT_SCOPE_NOWHERE :
- (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
+ unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
+ ? route->table : RT_TABLE_MAIN;
struct rtmsg rtm = {
.rtm_family = (alen == 4) ? AF_INET : AF_INET6,
.rtm_dst_len = route->mask,
- .rtm_table = RT_TABLE_MAIN,
- .rtm_protocol = RTPROT_BOOT,
- .rtm_scope = scope,
+ .rtm_src_len = route->sourcemask,
+ .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
+ .rtm_protocol = (route->flags & DEVADDR_KERNEL) ? RTPROT_KERNEL : RTPROT_STATIC,
+ .rtm_scope = RT_SCOPE_NOWHERE,
.rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
+ .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
};
+ struct nl_msg *msg;
+
+ if (cmd == RTM_NEWROUTE) {
+ flags |= NLM_F_CREATE | NLM_F_REPLACE;
+
+ if (!dev) { // Add null-route
+ rtm.rtm_scope = RT_SCOPE_UNIVERSE;
+ rtm.rtm_type = RTN_UNREACHABLE;
+ }
+ else
+ rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
+ }
- struct nl_msg *msg = nlmsg_alloc_simple(cmd, 0);
+ if (route->flags & DEVROUTE_TYPE) {
+ rtm.rtm_type = route->type;
+ if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
+ if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
+ rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
+ rtm.rtm_table = RT_TABLE_LOCAL;
+ }
+
+ if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT)
+ rtm.rtm_scope = RT_SCOPE_HOST;
+ else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
+ rtm.rtm_type == RTN_ANYCAST)
+ rtm.rtm_scope = RT_SCOPE_LINK;
+ }
+
+ msg = nlmsg_alloc_simple(cmd, flags);
if (!msg)
return -1;
if (route->mask)
nla_put(msg, RTA_DST, alen, &route->addr);
+ if (route->sourcemask)
+ nla_put(msg, RTA_SRC, alen, &route->source);
+
+ if (route->metric > 0)
+ nla_put_u32(msg, RTA_PRIORITY, route->metric);
+
if (have_gw)
nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
- if (route->flags & DEVADDR_DEVICE)
+ if (dev)
nla_put_u32(msg, RTA_OIF, dev->ifindex);
+ if (table >= 256)
+ nla_put_u32(msg, RTA_TABLE, table);
+
+ if (route->flags & DEVROUTE_MTU) {
+ struct nlattr *metrics;
+
+ if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
+ goto nla_put_failure;
+
+ nla_put_u32(msg, RTAX_MTU, route->mtu);
+
+ nla_nest_end(msg, metrics);
+ }
+
return system_rtnl_call(msg);
+
+nla_put_failure:
+ nlmsg_free(msg);
+ return -ENOMEM;
}
int system_add_route(struct device *dev, struct device_route *route)
{
return system_rt(dev, route, RTM_DELROUTE);
}
+
+int system_flush_routes(void)
+{
+ const char *names[] = {
+ "/proc/sys/net/ipv4/route/flush",
+ "/proc/sys/net/ipv6/route/flush"
+ };
+ int fd, i;
+
+ for (i = 0; i < ARRAY_SIZE(names); i++) {
+ fd = open(names[i], O_WRONLY);
+ if (fd < 0)
+ continue;
+
+ if (write(fd, "-1", 2)) {}
+ close(fd);
+ }
+ return 0;
+}
+
+bool system_resolve_rt_type(const char *type, unsigned int *id)
+{
+ return system_rtn_aton(type, id);
+}
+
+bool system_resolve_rt_table(const char *name, unsigned int *id)
+{
+ FILE *f;
+ char *e, buf[128];
+ unsigned int n, table = RT_TABLE_UNSPEC;
+
+ /* first try to parse table as number */
+ if ((n = strtoul(name, &e, 0)) > 0 && !*e)
+ table = n;
+
+ /* handle well known aliases */
+ else if (!strcmp(name, "default"))
+ table = RT_TABLE_DEFAULT;
+ else if (!strcmp(name, "main"))
+ table = RT_TABLE_MAIN;
+ else if (!strcmp(name, "local"))
+ table = RT_TABLE_LOCAL;
+
+ /* try to look up name in /etc/iproute2/rt_tables */
+ else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
+ {
+ while (fgets(buf, sizeof(buf) - 1, f) != NULL)
+ {
+ if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
+ continue;
+
+ n = strtoul(e, NULL, 10);
+ e = strtok(NULL, " \t\n");
+
+ if (e && !strcmp(e, name))
+ {
+ table = n;
+ break;
+ }
+ }
+
+ fclose(f);
+ }
+
+ if (table == RT_TABLE_UNSPEC)
+ return false;
+
+ *id = table;
+ return true;
+}
+
+bool system_is_default_rt_table(unsigned int id)
+{
+ return (id == RT_TABLE_MAIN);
+}
+
+static int system_iprule(struct iprule *rule, int cmd)
+{
+ int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
+
+ struct nl_msg *msg;
+ struct rtmsg rtm = {
+ .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
+ .rtm_protocol = RTPROT_STATIC,
+ .rtm_scope = RT_SCOPE_UNIVERSE,
+ .rtm_table = RT_TABLE_UNSPEC,
+ .rtm_type = RTN_UNSPEC,
+ .rtm_flags = 0,
+ };
+
+ if (cmd == RTM_NEWRULE) {
+ rtm.rtm_type = RTN_UNICAST;
+ rtm.rtm_flags |= NLM_F_REPLACE | NLM_F_EXCL;
+ }
+
+ if (rule->invert)
+ rtm.rtm_flags |= FIB_RULE_INVERT;
+
+ if (rule->flags & IPRULE_SRC)
+ rtm.rtm_src_len = rule->src_mask;
+
+ if (rule->flags & IPRULE_DEST)
+ rtm.rtm_dst_len = rule->dest_mask;
+
+ if (rule->flags & IPRULE_TOS)
+ rtm.rtm_tos = rule->tos;
+
+ if (rule->flags & IPRULE_LOOKUP) {
+ if (rule->lookup < 256)
+ rtm.rtm_table = rule->lookup;
+ }
+
+ if (rule->flags & IPRULE_ACTION)
+ rtm.rtm_type = rule->action;
+ else if (rule->flags & IPRULE_GOTO)
+ rtm.rtm_type = FR_ACT_GOTO;
+ else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
+ rtm.rtm_type = FR_ACT_NOP;
+
+ msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
+
+ if (!msg)
+ return -1;
+
+ nlmsg_append(msg, &rtm, sizeof(rtm), 0);
+
+ if (rule->flags & IPRULE_IN)
+ nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
+
+ if (rule->flags & IPRULE_OUT)
+ nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
+
+ if (rule->flags & IPRULE_SRC)
+ nla_put(msg, FRA_SRC, alen, &rule->src_addr);
+
+ if (rule->flags & IPRULE_DEST)
+ nla_put(msg, FRA_DST, alen, &rule->dest_addr);
+
+ if (rule->flags & IPRULE_PRIORITY)
+ nla_put_u32(msg, FRA_PRIORITY, rule->priority);
+ else if (cmd == RTM_NEWRULE)
+ nla_put_u32(msg, FRA_PRIORITY, rule->order);
+
+ if (rule->flags & IPRULE_FWMARK)
+ nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
+
+ if (rule->flags & IPRULE_FWMASK)
+ nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
+
+ if (rule->flags & IPRULE_LOOKUP) {
+ if (rule->lookup >= 256)
+ nla_put_u32(msg, FRA_TABLE, rule->lookup);
+ }
+
+ if (rule->flags & IPRULE_GOTO)
+ nla_put_u32(msg, FRA_GOTO, rule->gotoid);
+
+ return system_rtnl_call(msg);
+}
+
+int system_add_iprule(struct iprule *rule)
+{
+ return system_iprule(rule, RTM_NEWRULE);
+}
+
+int system_del_iprule(struct iprule *rule)
+{
+ return system_iprule(rule, RTM_DELRULE);
+}
+
+int system_flush_iprules(void)
+{
+ int rv = 0;
+ struct iprule rule;
+
+ system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
+ system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
+
+ memset(&rule, 0, sizeof(rule));
+
+
+ rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
+
+ rule.priority = 0;
+ rule.lookup = RT_TABLE_LOCAL;
+ rv |= system_iprule(&rule, RTM_NEWRULE);
+
+ rule.priority = 32766;
+ rule.lookup = RT_TABLE_MAIN;
+ rv |= system_iprule(&rule, RTM_NEWRULE);
+
+ rule.priority = 32767;
+ rule.lookup = RT_TABLE_DEFAULT;
+ rv |= system_iprule(&rule, RTM_NEWRULE);
+
+
+ rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
+
+ rule.priority = 0;
+ rule.lookup = RT_TABLE_LOCAL;
+ rv |= system_iprule(&rule, RTM_NEWRULE);
+
+ rule.priority = 32766;
+ rule.lookup = RT_TABLE_MAIN;
+ rv |= system_iprule(&rule, RTM_NEWRULE);
+
+ return rv;
+}
+
+bool system_resolve_iprule_action(const char *action, unsigned int *id)
+{
+ return system_rtn_aton(action, id);
+}
+
+time_t system_get_rtime(void)
+{
+ struct timespec ts;
+ struct timeval tv;
+
+ if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
+ return ts.tv_sec;
+
+ if (gettimeofday(&tv, NULL) == 0)
+ return tv.tv_sec;
+
+ return 0;
+}
+
+#ifndef IP_DF
+#define IP_DF 0x4000
+#endif
+
+static int tunnel_ioctl(const char *name, int cmd, void *p)
+{
+ struct ifreq ifr;
+
+ memset(&ifr, 0, sizeof(ifr));
+ strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
+ ifr.ifr_ifru.ifru_data = p;
+ return ioctl(sock_ioctl, cmd, &ifr);
+}
+
+int system_del_ip_tunnel(const char *name)
+{
+ return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
+}
+
+int system_update_ipv6_mtu(struct device *dev, int mtu)
+{
+ int ret = -1;
+ char buf[64];
+ snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
+ dev->ifname);
+
+ int fd = open(buf, O_RDWR);
+ ssize_t len = read(fd, buf, sizeof(buf) - 1);
+ if (len < 0)
+ goto out;
+
+ buf[len] = 0;
+ ret = atoi(buf);
+
+ if (!mtu || ret <= mtu)
+ goto out;
+
+ lseek(fd, 0, SEEK_SET);
+ if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) <= 0)
+ ret = -1;
+
+out:
+ close(fd);
+ return ret;
+}
+
+int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
+{
+ struct blob_attr *tb[__TUNNEL_ATTR_MAX];
+ struct blob_attr *cur;
+ bool set_df = true;
+ const char *str;
+
+ system_del_ip_tunnel(name);
+
+ blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
+ blob_data(attr), blob_len(attr));
+
+ if (!(cur = tb[TUNNEL_ATTR_TYPE]))
+ return -EINVAL;
+ str = blobmsg_data(cur);
+
+ if ((cur = tb[TUNNEL_ATTR_DF]))
+ set_df = blobmsg_get_bool(cur);
+
+ unsigned int ttl = 0;
+ if ((cur = tb[TUNNEL_ATTR_TTL])) {
+ ttl = blobmsg_get_u32(cur);
+ if (ttl > 255 || (!set_df && ttl))
+ return -EINVAL;
+ }
+
+ unsigned int link = 0;
+ if ((cur = tb[TUNNEL_ATTR_LINK])) {
+ struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
+ if (!iface)
+ return -EINVAL;
+
+ if (iface->l3_dev.dev)
+ link = iface->l3_dev.dev->ifindex;
+ }
+
+ if (!strcmp(str, "sit")) {
+ struct ip_tunnel_parm p = {
+ .link = link,
+ .iph = {
+ .version = 4,
+ .ihl = 5,
+ .frag_off = set_df ? htons(IP_DF) : 0,
+ .protocol = IPPROTO_IPV6,
+ .ttl = ttl
+ }
+ };
+
+ if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
+ inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
+ return -EINVAL;
+
+ if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
+ inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
+ return -EINVAL;
+
+ strncpy(p.name, name, sizeof(p.name));
+ if (tunnel_ioctl("sit0", SIOCADDTUNNEL, &p) < 0)
+ return -1;
+
+#ifdef SIOCADD6RD
+ if ((cur = tb[TUNNEL_ATTR_6RD_PREFIX])) {
+ unsigned int mask;
+ struct ip_tunnel_6rd p6;
+
+ memset(&p6, 0, sizeof(p6));
+
+ if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
+ &p6.prefix, &mask) || mask > 128)
+ return -EINVAL;
+ p6.prefixlen = mask;
+
+ if ((cur = tb[TUNNEL_ATTR_6RD_RELAY_PREFIX])) {
+ if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
+ &p6.relay_prefix, &mask) || mask > 32)
+ return -EINVAL;
+ p6.relay_prefixlen = mask;
+ }
+
+ if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
+ system_del_ip_tunnel(name);
+ return -1;
+ }
+ }
+#endif
+ } else if (!strcmp(str, "ipip6")) {
+ struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
+ NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
+ struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
+ int ret = 0;
+
+ if (!nlm)
+ return -1;
+
+ nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
+ nla_put_string(nlm, IFLA_IFNAME, name);
+
+ if (link)
+ nla_put_u32(nlm, IFLA_LINK, link);
+
+ struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
+ if (!linkinfo) {
+ ret = -ENOMEM;
+ goto failure;
+ }
+ nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
+ struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
+ if (!infodata) {
+ ret = -ENOMEM;
+ goto failure;
+ }
+
+ if (link)
+ nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
+
+ nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
+ nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
+ nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, 4);
+
+ struct in6_addr in6buf;
+ if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
+ if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
+ ret = -EINVAL;
+ goto failure;
+ }
+ nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
+ }
+
+ if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
+ if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
+ ret = -EINVAL;
+ goto failure;
+ }
+ nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
+ }
+
+#ifdef IFLA_IPTUN_FMR_MAX
+ if ((cur = tb[TUNNEL_ATTR_FMRS])) {
+ struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
+
+ struct blob_attr *fmr;
+ unsigned rem, fmrcnt = 0;
+ blobmsg_for_each_attr(fmr, cur, rem) {
+ if (blobmsg_type(fmr) != BLOBMSG_TYPE_STRING)
+ continue;
+
+ unsigned ip4len, ip6len, ealen, offset = 6;
+ char ip6buf[48];
+ char ip4buf[16];
+
+ if (sscanf(blobmsg_get_string(fmr), "%47[^/]/%u,%15[^/]/%u,%u,%u",
+ ip6buf, &ip6len, ip4buf, &ip4len, &ealen, &offset) < 5) {
+ ret = -EINVAL;
+ goto failure;
+ }
+
+ struct in6_addr ip6prefix;
+ struct in_addr ip4prefix;
+ if (inet_pton(AF_INET6, ip6buf, &ip6prefix) != 1 ||
+ inet_pton(AF_INET, ip4buf, &ip4prefix) != 1) {
+ ret = -EINVAL;
+ goto failure;
+ }
+
+ struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
+
+ nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
+ nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
+ nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
+ nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
+ nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
+ nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
+
+ nla_nest_end(nlm, rule);
+ }
+
+ nla_nest_end(nlm, fmrs);
+ }
+#endif
+
+ nla_nest_end(nlm, infodata);
+ nla_nest_end(nlm, linkinfo);
+
+ return system_rtnl_call(nlm);
+failure:
+ nlmsg_free(nlm);
+ return ret;
+ }
+ else
+ return -EINVAL;
+
+ return 0;
+}
projects / project / netifd.git / blobdiff