/* * netifd - network interface daemon * Copyright (C) 2012 Felix Fietkau * Copyright (C) 2013 Jo-Philipp Wich * Copyright (C) 2013 Steven Barth * Copyright (C) 2014 Gioacchino Mazzurco * Copyright (C) 2017 Matthias Schiffer * Copyright (C) 2018 Hans Dedecker * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ethtool-modes.h" #ifndef RTN_FAILED_POLICY #define RTN_FAILED_POLICY 12 #endif #ifndef IFA_F_NOPREFIXROUTE #define IFA_F_NOPREFIXROUTE 0x200 #endif #ifndef IFA_FLAGS #define IFA_FLAGS (IFA_MULTICAST + 1) #endif #include #include #include #include #include #include #include #include #include #include "netifd.h" #include "device.h" #include "system.h" #include "utils.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 int cb_rtnl_event(struct nl_msg *msg, void *arg); static void handle_hotplug_event(struct uloop_fd *u, unsigned int events); static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb); static char dev_buf[256]; static const char *proc_path = "/proc"; static const char *sysfs_path = "/sys"; struct netdev_type { unsigned short id; const char *name; }; static const struct netdev_type netdev_types[] = { {ARPHRD_NETROM, "netrom"}, {ARPHRD_ETHER, "ethernet"}, {ARPHRD_EETHER, "eethernet"}, {ARPHRD_AX25, "ax25"}, {ARPHRD_PRONET, "pronet"}, {ARPHRD_CHAOS, "chaos"}, {ARPHRD_IEEE802, "ieee802"}, {ARPHRD_ARCNET, "arcnet"}, {ARPHRD_APPLETLK, "appletlk"}, {ARPHRD_DLCI, "dlci"}, {ARPHRD_ATM, "atm"}, {ARPHRD_METRICOM, "metricom"}, {ARPHRD_IEEE1394, "ieee1394"}, {ARPHRD_EUI64, "eui64"}, {ARPHRD_INFINIBAND, "infiniband"}, {ARPHRD_SLIP, "slip"}, {ARPHRD_CSLIP, "cslip"}, {ARPHRD_SLIP6, "slip6"}, {ARPHRD_CSLIP6, "cslip6"}, {ARPHRD_RSRVD, "rsrvd"}, {ARPHRD_ADAPT, "adapt"}, {ARPHRD_ROSE, "rose"}, {ARPHRD_X25, "x25"}, {ARPHRD_HWX25, "hwx25"}, {ARPHRD_PPP, "ppp"}, {ARPHRD_CISCO, "cisco"}, {ARPHRD_LAPB, "lapb"}, {ARPHRD_DDCMP, "ddcmp"}, {ARPHRD_RAWHDLC, "rawhdlc"}, {ARPHRD_TUNNEL, "tunnel"}, {ARPHRD_TUNNEL6, "tunnel6"}, {ARPHRD_FRAD, "frad"}, {ARPHRD_SKIP, "skip"}, {ARPHRD_LOOPBACK, "loopback"}, {ARPHRD_LOCALTLK, "localtlk"}, {ARPHRD_FDDI, "fddi"}, {ARPHRD_BIF, "bif"}, {ARPHRD_SIT, "sit"}, {ARPHRD_IPDDP, "ipddp"}, {ARPHRD_IPGRE, "ipgre"}, {ARPHRD_PIMREG,"pimreg"}, {ARPHRD_HIPPI, "hippi"}, {ARPHRD_ASH, "ash"}, {ARPHRD_ECONET, "econet"}, {ARPHRD_IRDA, "irda"}, {ARPHRD_FCPP, "fcpp"}, {ARPHRD_FCAL, "fcal"}, {ARPHRD_FCPL, "fcpl"}, {ARPHRD_FCFABRIC, "fcfabric"}, {ARPHRD_IEEE80211, "ieee80211"}, {ARPHRD_IEEE80211_PRISM, "ie80211-prism"}, {ARPHRD_IEEE80211_RADIOTAP, "ieee80211-radiotap"}, #ifdef ARPHRD_PHONET {ARPHRD_PHONET, "phonet"}, #endif #ifdef ARPHRD_PHONET_PIPE {ARPHRD_PHONET_PIPE, "phonet-pipe"}, #endif {ARPHRD_IEEE802154, "ieee802154"}, {ARPHRD_VOID, "void"}, {ARPHRD_NONE, "none"} }; static void handler_nl_event(struct uloop_fd *u, unsigned int events) { struct event_socket *ev = container_of(u, struct event_socket, uloop); int ret; ret = nl_recvmsgs_default(ev->sock); if (ret >= 0) return; switch (-ret) { case NLE_NOMEM: /* 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; } return; abort: uloop_fd_delete(&ev->uloop); return; } static void nl_udebug_cb(void *priv, struct nl_msg *msg) { struct nlmsghdr *nlh = nlmsg_hdr(msg); udebug_netlink_msg(priv, nlmsg_get_proto(msg), nlh, nlh->nlmsg_len); } 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)) { nl_socket_free(sock); return NULL; } nl_socket_set_tx_debug_cb(sock, nl_udebug_cb, &udb_nl); nl_socket_set_rx_debug_cb(sock, nl_udebug_cb, &udb_nl); 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 create_hotplug_event_socket(struct event_socket *ev, int protocol, void (*cb)(struct uloop_fd *u, unsigned int events)) { if (!create_raw_event_socket(ev, protocol, 1, cb, ULOOP_ERROR_CB)) return false; /* 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; } static bool system_tos_aton(const char *src, unsigned *dst) { char *e; *dst = strtoul(src, &e, 16); if (e == src || *e || *dst > 255) return false; 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); system_fd_set_cloexec(sock_ioctl); /* Prepare socket for routing / address control */ sock_rtnl = create_socket(NETLINK_ROUTE, 0); if (!sock_rtnl) return -1; if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event)) return -1; if (!create_hotplug_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT, handle_hotplug_event)) return -1; /* Receive network link events form kernel */ nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK); return 0; } static void write_file(const char *path, const char *val) { int fd; fd = open(path, O_WRONLY); if (fd < 0) return; if (write(fd, val, strlen(val))) {} close(fd); } static int read_file(const char *path, char *buf, const size_t buf_sz) { 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 const char * dev_sysctl_path(const char *prefix, const char *ifname, const char *file) { snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/%s/%s", proc_path, prefix, ifname, file); return dev_buf; } static const char * dev_sysfs_path(const char *ifname, const char *file) { snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/%s/%s", sysfs_path, ifname, file); return dev_buf; } static void system_set_dev_sysctl(const char *prefix, const char *file, const char *ifname, const char *val) { write_file(dev_sysctl_path(prefix, ifname, file), val); } static int system_get_dev_sysctl(const char *prefix, const char *file, const char *ifname, char *buf, size_t buf_sz) { return read_file(dev_sysctl_path(prefix, ifname, file), buf, buf_sz); } static void system_set_dev_sysfs(const char *file, const char *ifname, const char *val) { if (!val) return; write_file(dev_sysfs_path(ifname, file), val); } static void system_set_dev_sysfs_int(const char *file, const char *ifname, int val) { char buf[16]; snprintf(buf, sizeof(buf), "%d", val); system_set_dev_sysfs(file, ifname, buf); } static int system_get_dev_sysfs(const char *file, const char *ifname, char *buf, size_t buf_sz) { return read_file(dev_sysfs_path(ifname, file), buf, buf_sz); } static void system_set_disable_ipv6(struct device *dev, const char *val) { system_set_dev_sysctl("ipv6/conf", "disable_ipv6", dev->ifname, val); } static void system_set_ip6segmentrouting(struct device *dev, const char *val) { system_set_dev_sysctl("ipv6/conf", "seg6_enabled", dev->ifname, val); } static void system_set_rpfilter(struct device *dev, const char *val) { system_set_dev_sysctl("ipv4/conf", "rp_filter", dev->ifname, val); } static void system_set_acceptlocal(struct device *dev, const char *val) { system_set_dev_sysctl("ipv4/conf", "accept_local", dev->ifname, val); } static void system_set_igmpversion(struct device *dev, const char *val) { system_set_dev_sysctl("ipv4/conf", "force_igmp_version", dev->ifname, val); } static void system_set_mldversion(struct device *dev, const char *val) { system_set_dev_sysctl("ipv6/conf", "force_mld_version", dev->ifname, val); } static void system_set_neigh4reachabletime(struct device *dev, const char *val) { system_set_dev_sysctl("ipv4/neigh", "base_reachable_time_ms", dev->ifname, val); } static void system_set_neigh6reachabletime(struct device *dev, const char *val) { system_set_dev_sysctl("ipv6/neigh", "base_reachable_time_ms", dev->ifname, val); } static void system_set_neigh4gcstaletime(struct device *dev, const char *val) { system_set_dev_sysctl("ipv4/neigh", "gc_stale_time", dev->ifname, val); } static void system_set_neigh6gcstaletime(struct device *dev, const char *val) { system_set_dev_sysctl("ipv6/neigh", "gc_stale_time", dev->ifname, val); } static void system_set_neigh4locktime(struct device *dev, const char *val) { system_set_dev_sysctl("ipv4/neigh", "locktime", dev->ifname, val); } static void system_set_dadtransmits(struct device *dev, const char *val) { system_set_dev_sysctl("ipv6/conf", "dad_transmits", dev->ifname, val); } static void system_set_sendredirects(struct device *dev, const char *val) { system_set_dev_sysctl("ipv4/conf", "send_redirects", dev->ifname, val); } static void system_set_drop_v4_unicast_in_l2_multicast(struct device *dev, const char *val) { system_set_dev_sysctl("ipv4/conf", "drop_unicast_in_l2_multicast", dev->ifname, val); } static void system_set_drop_v6_unicast_in_l2_multicast(struct device *dev, const char *val) { system_set_dev_sysctl("ipv6/conf", "drop_unicast_in_l2_multicast", dev->ifname, val); } static void system_set_drop_gratuitous_arp(struct device *dev, const char *val) { system_set_dev_sysctl("ipv4/conf", "drop_gratuitous_arp", dev->ifname, val); } static void system_set_drop_unsolicited_na(struct device *dev, const char *val) { system_set_dev_sysctl("ipv6/conf", "drop_unsolicited_na", dev->ifname, val); } static void system_set_arp_accept(struct device *dev, const char *val) { system_set_dev_sysctl("ipv4/conf", "arp_accept", dev->ifname, val); } static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val) { system_set_dev_sysfs("brport/multicast_to_unicast", dev->ifname, val); } static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val) { system_set_dev_sysfs("brport/multicast_fast_leave", dev->ifname, val); } static void system_bridge_set_hairpin_mode(struct device *dev, const char *val) { system_set_dev_sysfs("brport/hairpin_mode", dev->ifname, val); } static void system_bridge_set_proxyarp_wifi(struct device *dev, const char *val) { system_set_dev_sysfs("brport/proxyarp_wifi", dev->ifname, val); } static void system_bridge_set_bpdu_filter(struct device *dev, const char *val) { system_set_dev_sysfs("brport/bpdu_filter", dev->ifname, val); } static void system_bridge_set_isolated(struct device *dev, const char *val) { system_set_dev_sysfs("brport/isolated", dev->ifname, val); } static void system_bridge_set_multicast_router(struct device *dev, const char *val) { system_set_dev_sysfs("brport/multicast_router", dev->ifname, val); } void system_bridge_set_stp_state(struct device *dev, bool val) { const char *valstr = val ? "1" : "0"; system_set_dev_sysfs("bridge/stp_state", dev->ifname, valstr); } static void system_bridge_set_learning(struct device *dev, const char *val) { system_set_dev_sysfs("brport/learning", dev->ifname, val); } static void system_bridge_set_unicast_flood(struct device *dev, const char *val) { system_set_dev_sysfs("brport/unicast_flood", dev->ifname, val); } static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("ipv6/conf", "disable_ipv6", dev->ifname, buf, buf_sz); } static int system_get_ip6segmentrouting(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("ipv6/conf", "seg6_enabled", dev->ifname, buf, buf_sz); } static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("ipv4/conf", "rp_filter", dev->ifname, buf, buf_sz); } static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("ipv4/conf", "accept_local", dev->ifname, buf, buf_sz); } static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("ipv4/conf", "force_igmp_version", dev->ifname, buf, buf_sz); } static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("ipv6/conf", "force_mld_version", dev->ifname, buf, buf_sz); } static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("ipv4/neigh", "base_reachable_time_ms", dev->ifname, buf, buf_sz); } static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("ipv6/neigh", "base_reachable_time_ms", dev->ifname, buf, buf_sz); } static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("ipv4/neigh", "gc_stale_time", dev->ifname, buf, buf_sz); } static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("ipv6/neigh", "gc_stale_time", dev->ifname, buf, buf_sz); } static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("ipv4/neigh", "locktime", dev->ifname, buf, buf_sz); } static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("ipv6/conf", "dad_transmits", dev->ifname, buf, buf_sz); } static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("ipv4/conf", "send_redirects", dev->ifname, buf, buf_sz); } static int system_get_drop_v4_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("ipv4/conf", "drop_unicast_in_l2_multicast", dev->ifname, buf, buf_sz); } static int system_get_drop_v6_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("ipv6/conf", "drop_unicast_in_l2_multicast", dev->ifname, buf, buf_sz); } static int system_get_drop_gratuitous_arp(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("ipv4/conf", "drop_gratuitous_arp", dev->ifname, buf, buf_sz); } static int system_get_drop_unsolicited_na(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("ipv6/conf", "drop_unsolicited_na", dev->ifname, buf, buf_sz); } static int system_get_arp_accept(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("ipv4/conf", "arp_accept", dev->ifname, buf, buf_sz); } #ifndef IFF_LOWER_UP #define IFF_LOWER_UP 0x10000 #endif static void system_device_update_state(struct device *dev, unsigned int flags, unsigned int ifindex) { if (dev->type == &simple_device_type) { if (dev->external) device_set_disabled(dev, !(flags & IFF_UP)); device_set_present(dev, ifindex > 0); } device_set_link(dev, flags & IFF_LOWER_UP ? true : false); } /* Evaluate netlink messages */ static int cb_rtnl_event(struct nl_msg *msg, void *arg) { struct nlmsghdr *nh = nlmsg_hdr(msg); struct ifinfomsg *ifi = NLMSG_DATA(nh); struct nlattr *nla[__IFLA_MAX]; struct device *dev; if (nh->nlmsg_type != RTM_NEWLINK) return 0; nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL); if (!nla[IFLA_IFNAME]) return 0; dev = device_find(nla_data(nla[IFLA_IFNAME])); if (!dev) return 0; system_device_update_state(dev, ifi->ifi_flags, ifi->ifi_index); return 0; } static void handle_hotplug_msg(char *data, int size) { const char *subsystem = NULL, *interface = NULL, *interface_old = NULL; char *cur, *end, *sep; int skip; bool add; if (!strncmp(data, "add@", 4) || !strncmp(data, "move@", 5)) 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; } else if (!strcmp(cur, "DEVPATH_OLD")) { interface_old = strrchr(sep + 1, '/'); if (interface_old) interface_old++; } } if (!subsystem || !interface) return; if (interface_old) device_hotplug_event(interface_old, false); device_hotplug_event(interface, 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); } switch (-size) { case 0: return; case NLE_NOMEM: /* Increase rx buffer size on netlink socket */ ev->bufsize *= 2; if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0)) goto abort; break; default: goto abort; } return; abort: uloop_fd_delete(&ev->uloop); return; } static int system_rtnl_call(struct nl_msg *msg) { int ret; ret = nl_send_auto_complete(sock_rtnl, msg); nlmsg_free(msg); if (ret < 0) return ret; return nl_wait_for_ack(sock_rtnl); } static struct nl_msg *__system_ifinfo_msg(int af, int index, const char *ifname, uint16_t type, uint16_t flags) { struct nl_msg *msg; struct ifinfomsg iim = { .ifi_family = af, .ifi_index = index, }; msg = nlmsg_alloc_simple(type, flags | NLM_F_REQUEST); if (!msg) return NULL; nlmsg_append(msg, &iim, sizeof(iim), 0); if (ifname) nla_put_string(msg, IFLA_IFNAME, ifname); return msg; } static struct nl_msg *system_ifinfo_msg(const char *ifname, uint16_t type, uint16_t flags) { return __system_ifinfo_msg(AF_UNSPEC, 0, ifname, type, flags); } static int system_link_del(const char *ifname) { struct nl_msg *msg; msg = system_ifinfo_msg(ifname, RTM_DELLINK, 0); if (!msg) return -1; return system_rtnl_call(msg); } int system_bridge_delbr(struct device *bridge) { return system_link_del(bridge->ifname); } 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 ifr.ifr_data = data; strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1); return ioctl(sock_ioctl, cmd, &ifr); } static bool system_is_bridge(const char *name) { struct stat st; return stat(dev_sysfs_path(name, "bridge"), &st) >= 0; } static char *system_get_bridge(const char *name, char *buf, int buflen) { char *path; ssize_t len = -1; glob_t gl; snprintf(buf, buflen, "%s/devices/virtual/net/*/brif/%s/bridge", sysfs_path, name); if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0) return NULL; if (gl.gl_pathc > 0) len = readlink(gl.gl_pathv[0], buf, buflen); globfree(&gl); if (len < 0) return NULL; buf[len] = 0; path = strrchr(buf, '/'); if (!path) return NULL; return path + 1; } static void system_bridge_set_wireless(struct device *bridge, struct device *dev) { bool mcast_to_ucast = dev->wireless_ap; bool hairpin; if (dev->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST) mcast_to_ucast = dev->settings.multicast_to_unicast; else if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST && !bridge->settings.multicast_to_unicast) mcast_to_ucast = false; hairpin = mcast_to_ucast || dev->wireless_proxyarp; if (dev->wireless_isolate) hairpin = false; system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0"); system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0"); system_bridge_set_proxyarp_wifi(dev, dev->wireless_proxyarp ? "1" : "0"); } int system_bridge_addif(struct device *bridge, struct device *dev) { char buf[64]; char *oldbr; int tries = 0; int ret; for (tries = 0; tries < 3; tries++) { ret = 0; oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf)); if (oldbr && !strcmp(oldbr, bridge->ifname)) break; ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL); if (!ret) break; D(SYSTEM, "Failed to add device '%s' to bridge '%s' (tries=%d): %s", dev->ifname, bridge->ifname, tries, strerror(errno)); } if (dev->wireless) system_bridge_set_wireless(bridge, dev); if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) { snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router); system_bridge_set_multicast_router(dev, buf); } if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE && dev->settings.multicast_fast_leave) system_bridge_set_multicast_fast_leave(dev, "1"); if (dev->settings.flags & DEV_OPT_LEARNING && !dev->settings.learning) system_bridge_set_learning(dev, "0"); if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD && !dev->settings.unicast_flood) system_bridge_set_unicast_flood(dev, "0"); if (dev->settings.flags & DEV_OPT_ISOLATE && dev->settings.isolate) system_bridge_set_isolated(dev, "1"); if (dev->bpdu_filter) system_bridge_set_bpdu_filter(dev, dev->bpdu_filter ? "1" : "0"); return ret; } int system_bridge_delif(struct device *bridge, struct device *dev) { return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL); } int system_bridge_vlan(const char *iface, uint16_t vid, int16_t vid_end, bool add, unsigned int vflags) { struct bridge_vlan_info vinfo = { .vid = vid, }; unsigned short flags = 0; struct nlattr *afspec; struct nl_msg *nlm; int index; int ret = 0; index = if_nametoindex(iface); if (!index) return -1; nlm = __system_ifinfo_msg(PF_BRIDGE, index, NULL, add ? RTM_SETLINK : RTM_DELLINK, 0); if (!nlm) return -1; if (vflags & BRVLAN_F_SELF) flags |= BRIDGE_FLAGS_SELF; if (vflags & BRVLAN_F_PVID) vinfo.flags |= BRIDGE_VLAN_INFO_PVID; if (vflags & BRVLAN_F_UNTAGGED) vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED; afspec = nla_nest_start(nlm, IFLA_AF_SPEC); if (!afspec) { ret = -ENOMEM; goto failure; } if (flags) nla_put_u16(nlm, IFLA_BRIDGE_FLAGS, flags); if (vid_end > vid) vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN; nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo); if (vid_end > vid) { vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN; vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_END; vinfo.vid = vid_end; nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo); } nla_nest_end(nlm, afspec); return system_rtnl_call(nlm); failure: nlmsg_free(nlm); return ret; } int system_bonding_set_device(struct device *dev, struct bonding_config *cfg) { const char *ifname = dev->ifname; struct blob_attr *cur; char op = cfg ? '+' : '-'; char buf[64]; size_t rem; snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/bonding_masters", sysfs_path); snprintf(buf, sizeof(buf), "%c%s", op, ifname); write_file(dev_buf, buf); if (!cfg) return 0; system_set_dev_sysfs("bonding/mode", ifname, bonding_policy_str[cfg->policy]); system_set_dev_sysfs_int("bonding/all_ports_active", ifname, cfg->all_ports_active); if (cfg->policy == BONDING_MODE_BALANCE_XOR || cfg->policy == BONDING_MODE_BALANCE_TLB || cfg->policy == BONDING_MODE_8023AD) system_set_dev_sysfs("bonding/xmit_hash_policy", ifname, cfg->xmit_hash_policy); if (cfg->policy == BONDING_MODE_8023AD) { system_set_dev_sysfs("bonding/ad_actor_system", ifname, cfg->ad_actor_system); system_set_dev_sysfs_int("bonding/ad_actor_sys_prio", ifname, cfg->ad_actor_sys_prio); system_set_dev_sysfs("bonding/ad_select", ifname, cfg->ad_select); system_set_dev_sysfs("bonding/lacp_rate", ifname, cfg->lacp_rate); system_set_dev_sysfs_int("bonding/min_links", ifname, cfg->min_links); } if (cfg->policy == BONDING_MODE_BALANCE_RR) system_set_dev_sysfs_int("bonding/packets_per_slave", ifname, cfg->packets_per_port); if (cfg->policy == BONDING_MODE_BALANCE_TLB || cfg->policy == BONDING_MODE_BALANCE_ALB) system_set_dev_sysfs_int("bonding/lp_interval", ifname, cfg->lp_interval); if (cfg->policy == BONDING_MODE_BALANCE_TLB) system_set_dev_sysfs_int("bonding/tlb_dynamic_lb", ifname, cfg->dynamic_lb); system_set_dev_sysfs_int("bonding/resend_igmp", ifname, cfg->resend_igmp); system_set_dev_sysfs_int("bonding/num_grat_arp", ifname, cfg->num_peer_notif); system_set_dev_sysfs("bonding/primary_reselect", ifname, cfg->primary_reselect); system_set_dev_sysfs("bonding/fail_over_mac", ifname, cfg->failover_mac); system_set_dev_sysfs_int((cfg->monitor_arp ? "bonding/arp_interval" : "bonding/miimon"), ifname, cfg->monitor_interval); blobmsg_for_each_attr(cur, cfg->arp_target, rem) { snprintf(buf, sizeof(buf), "+%s", blobmsg_get_string(cur)); system_set_dev_sysfs("bonding/arp_ip_target", ifname, buf); } system_set_dev_sysfs_int("bonding/arp_all_targets", ifname, cfg->arp_all_targets); if (cfg->policy < BONDING_MODE_8023AD) system_set_dev_sysfs("bonding/arp_validate", ifname, cfg->arp_validate); system_set_dev_sysfs_int("bonding/use_carrier", ifname, cfg->use_carrier); if (!cfg->monitor_arp && cfg->monitor_interval) { system_set_dev_sysfs_int("bonding/updelay", ifname, cfg->updelay); system_set_dev_sysfs_int("bonding/downdelay", ifname, cfg->downdelay); } return 0; } int system_bonding_set_port(struct device *dev, struct device *port, bool add, bool primary) { const char *port_name = port->ifname; const char op_ch = add ? '+' : '-'; char buf[IFNAMSIZ + 1]; snprintf(buf, sizeof(buf), "%c%s", op_ch, port_name); system_if_down(port); system_set_dev_sysfs("bonding/slaves", dev->ifname, buf); system_if_up(port); if (primary) system_set_dev_sysfs("bonding/primary", dev->ifname, add ? port_name : ""); return 0; } int system_if_resolve(struct device *dev) { struct ifreq ifr; memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1); if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr)) return ifr.ifr_ifindex; else return 0; } 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) - 1); if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0) return -1; ifr.ifr_flags |= add; ifr.ifr_flags &= ~rem; 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 (long)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, ret; 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"); else D(SYSTEM, "Remove %s from device %s", 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); ret = nl_send_auto_complete(sock_rtnl, clr->msg); if (ret < 0) { if (type == RTM_DELRULE) D(SYSTEM, "Error deleting a rule: %d", ret); else D(SYSTEM, "Error deleting %s from device '%s': %d", type == RTM_DELADDR ? "an address" : "a route", clr->dev->ifname, ret); } 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; 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; } cb = nl_cb_alloc(NL_CB_DEFAULT); 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); if (nl_send_auto_complete(sock_rtnl, clr.msg) < 0) goto free; while (pending > 0) nl_recvmsgs(sock_rtnl, cb); free: 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) { static char buf[256]; char *bridge; device_set_ifindex(dev, system_if_resolve(dev)); if (dev->external || !dev->ifindex) return; system_if_flags(dev->ifname, 0, IFF_UP); if (system_is_bridge(dev->ifname)) { D(SYSTEM, "Delete existing bridge named '%s'", dev->ifname); system_bridge_delbr(dev); return; } bridge = system_get_bridge(dev->ifname, buf, sizeof(buf)); if (bridge) { D(SYSTEM, "Remove device '%s' from bridge '%s'", 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_if_clear_entries(dev, RTM_GETNEIGH, AF_INET); system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET6); system_set_disable_ipv6(dev, "0"); } static inline unsigned long sec_to_jiffies(int val) { return (unsigned long) val * 100; } int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg) { struct nlattr *linkinfo, *data; struct nl_msg *msg; uint64_t val; int rv; msg = system_ifinfo_msg(bridge->ifname, RTM_NEWLINK, NLM_F_CREATE | NLM_F_EXCL); if (!msg) return -1; if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) goto nla_put_failure; nla_put_string(msg, IFLA_INFO_KIND, "bridge"); if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) goto nla_put_failure; nla_put_u32(msg, IFLA_BR_STP_STATE, cfg->stp); nla_put_u32(msg, IFLA_BR_FORWARD_DELAY, sec_to_jiffies(cfg->forward_delay)); nla_put_u8(msg, IFLA_BR_MCAST_SNOOPING, !!cfg->igmp_snoop); nla_put_u8(msg, IFLA_BR_MCAST_QUERIER, !!cfg->multicast_querier); nla_put_u32(msg, IFLA_BR_MCAST_HASH_MAX, cfg->hash_max); if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) nla_put_u8(msg, IFLA_BR_MCAST_ROUTER, !!bridge->settings.multicast_router); if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) { nla_put_u32(msg, IFLA_BR_MCAST_STARTUP_QUERY_CNT, cfg->robustness); nla_put_u32(msg, IFLA_BR_MCAST_LAST_MEMBER_CNT, cfg->robustness); } if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) nla_put_u64(msg, IFLA_BR_MCAST_QUERY_INTVL, cfg->query_interval); if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) nla_put_u64(msg, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, cfg->query_response_interval); if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) nla_put_u64(msg, IFLA_BR_MCAST_LAST_MEMBER_INTVL, cfg->last_member_interval); if (cfg->flags & BRIDGE_OPT_ROBUSTNESS || cfg->flags & BRIDGE_OPT_QUERY_INTERVAL || cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) { val = cfg->robustness * cfg->query_interval + cfg->query_response_interval; nla_put_u64(msg, IFLA_BR_MCAST_MEMBERSHIP_INTVL, val); val -= cfg->query_response_interval / 2; nla_put_u64(msg, IFLA_BR_MCAST_QUERIER_INTVL, val); } if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) { val = cfg->query_interval / 4; nla_put_u64(msg, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, val); } nla_put_u8(msg, IFLA_BR_VLAN_FILTERING, !!cfg->vlan_filtering); nla_put_u16(msg, IFLA_BR_PRIORITY, cfg->priority); nla_put_u32(msg, IFLA_BR_HELLO_TIME, sec_to_jiffies(cfg->hello_time)); nla_put_u32(msg, IFLA_BR_MAX_AGE, sec_to_jiffies(cfg->max_age)); if (cfg->flags & BRIDGE_OPT_AGEING_TIME) nla_put_u32(msg, IFLA_BR_AGEING_TIME, sec_to_jiffies(cfg->ageing_time)); nla_nest_end(msg, data); nla_nest_end(msg, linkinfo); rv = system_rtnl_call(msg); if (rv) D(SYSTEM, "Error adding bridge '%s': %d", bridge->ifname, rv); return rv; nla_put_failure: nlmsg_free(msg); return -ENOMEM; } int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg) { struct nl_msg *msg; struct nlattr *linkinfo, *data; size_t i; int 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 }, }; msg = system_ifinfo_msg(macvlan->ifname, RTM_NEWLINK, NLM_F_CREATE | NLM_F_EXCL); if (!msg) return -1; if (cfg->flags & MACVLAN_OPT_MACADDR) nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr); nla_put_u32(msg, IFLA_LINK, dev->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", macvlan->ifname, dev->ifname, rv); return rv; nla_put_failure: nlmsg_free(msg); return -ENOMEM; } int system_link_netns_move(struct device *dev, int netns_fd, const char *target_ifname) { struct nl_msg *msg; int index; if (!dev) return -1; index = system_if_resolve(dev); msg = __system_ifinfo_msg(AF_UNSPEC, index, target_ifname, RTM_NEWLINK, 0); if (!msg) return -1; nla_put_u32(msg, IFLA_NET_NS_FD, netns_fd); return system_rtnl_call(msg); } int system_macvlan_del(struct device *macvlan) { return system_link_del(macvlan->ifname); } int system_netns_open(const pid_t target_ns) { char pid_net_path[PATH_MAX]; snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%u/ns/net", target_ns); return open(pid_net_path, O_RDONLY); } int system_netns_set(int netns_fd) { return setns(netns_fd, CLONE_NEWNET); } int system_veth_add(struct device *veth, struct veth_config *cfg) { struct nl_msg *msg; struct ifinfomsg empty_iim = {0,}; struct nlattr *linkinfo, *data, *veth_info; int rv; msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL); if (!msg) return -1; nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0); if (cfg->flags & VETH_OPT_MACADDR) nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr); nla_put_string(msg, IFLA_IFNAME, veth->ifname); if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) goto nla_put_failure; nla_put_string(msg, IFLA_INFO_KIND, "veth"); if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) goto nla_put_failure; if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER))) goto nla_put_failure; nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0); if (cfg->flags & VETH_OPT_PEER_NAME) nla_put_string(msg, IFLA_IFNAME, cfg->peer_name); if (cfg->flags & VETH_OPT_PEER_MACADDR) nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr); nla_nest_end(msg, veth_info); nla_nest_end(msg, data); nla_nest_end(msg, linkinfo); rv = system_rtnl_call(msg); if (rv) { if (cfg->flags & VETH_OPT_PEER_NAME) D(SYSTEM, "Error adding veth '%s' with peer '%s': %d", veth->ifname, cfg->peer_name, rv); else D(SYSTEM, "Error adding veth '%s': %d", veth->ifname, rv); } return rv; nla_put_failure: nlmsg_free(msg); return -ENOMEM; } int system_veth_del(struct device *veth) { return system_link_del(veth->ifname); } static int system_vlan(struct device *dev, int id) { struct vlan_ioctl_args ifr = { .cmd = SET_VLAN_NAME_TYPE_CMD, .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, }; if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0) return -1; if (id < 0) { ifr.cmd = DEL_VLAN_CMD; ifr.u.VID = 0; } else { ifr.cmd = ADD_VLAN_CMD; ifr.u.VID = id; } strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1)); return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr); } int system_vlan_add(struct device *dev, int id) { return system_vlan(dev, id); } int system_vlan_del(struct device *dev) { 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, *qos; struct ifinfomsg iim = { .ifi_family = AF_UNSPEC }; struct vlan_qos_mapping *elem; struct ifla_vlan_qos_mapping nl_qos_map; int rv; 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, dev->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 if (!(qos = nla_nest_start(msg, IFLA_VLAN_INGRESS_QOS))) goto nla_put_failure; vlist_simple_for_each_element(&cfg->ingress_qos_mapping_list, elem, node) { nl_qos_map.from = elem->from; nl_qos_map.to = elem->to; nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map); } nla_nest_end(msg, qos); if (!(qos = nla_nest_start(msg, IFLA_VLAN_EGRESS_QOS))) goto nla_put_failure; vlist_simple_for_each_element(&cfg->egress_qos_mapping_list, elem, node) { nl_qos_map.from = elem->from; nl_qos_map.to = elem->to; nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map); } nla_nest_end(msg, qos); 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", 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->ifname); } #if LINUX_VERSION_CODE >= KERNEL_VERSION(6,1,0) struct if_get_master_data { int ifindex; int master_ifindex; int pending; }; static void if_get_master_dsa_linkinfo_attr(struct if_get_master_data *data, struct rtattr *attr) { struct rtattr *cur; int rem = RTA_PAYLOAD(attr); for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) { if (cur->rta_type != IFLA_DSA_MASTER) continue; data->master_ifindex = *(__u32 *)RTA_DATA(cur); } } static void if_get_master_linkinfo_attr(struct if_get_master_data *data, struct rtattr *attr) { struct rtattr *cur; int rem = RTA_PAYLOAD(attr); for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) { if (cur->rta_type != IFLA_INFO_KIND && cur->rta_type != IFLA_INFO_DATA) continue; if (cur->rta_type == IFLA_INFO_KIND && strcmp("dsa", (char *)RTA_DATA(cur))) break; if (cur->rta_type == IFLA_INFO_DATA) if_get_master_dsa_linkinfo_attr(data, cur); } } static int cb_if_get_master_valid(struct nl_msg *msg, void *arg) { struct nlmsghdr *nh = nlmsg_hdr(msg); struct ifinfomsg *ifi = NLMSG_DATA(nh); struct if_get_master_data *data = (struct if_get_master_data *)arg; struct rtattr *attr; int rem; if (nh->nlmsg_type != RTM_NEWLINK) return NL_SKIP; if (ifi->ifi_family != AF_UNSPEC) return NL_SKIP; if (ifi->ifi_index != data->ifindex) return NL_SKIP; attr = IFLA_RTA(ifi); rem = nh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi)); while (RTA_OK(attr, rem)) { if (attr->rta_type == IFLA_LINKINFO) if_get_master_linkinfo_attr(data, attr); attr = RTA_NEXT(attr, rem); } return NL_OK; } static int cb_if_get_master_ack(struct nl_msg *msg, void *arg) { struct if_get_master_data *data = (struct if_get_master_data *)arg; data->pending = 0; return NL_STOP; } static int cb_if_get_master_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg) { struct if_get_master_data *data = (struct if_get_master_data *)arg; data->pending = 0; return NL_STOP; } static int system_if_get_master_ifindex(struct device *dev) { 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_get_master_data data = { .ifindex = if_nametoindex(dev->ifname), .master_ifindex = -1, .pending = 1, }; int ret = -1; if (!cb) return ret; msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_REQUEST); if (!msg) goto out; if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) || nla_put_string(msg, IFLA_IFNAME, dev->ifname)) goto free; nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_get_master_valid, &data); nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_get_master_ack, &data); nl_cb_err(cb, NL_CB_CUSTOM, cb_if_get_master_error, &data); ret = nl_send_auto_complete(sock_rtnl, msg); if (ret < 0) goto free; while (data.pending > 0) nl_recvmsgs(sock_rtnl, cb); if (data.master_ifindex >= 0) ret = data.master_ifindex; free: nlmsg_free(msg); out: nl_cb_put(cb); return ret; } static void system_refresh_orig_macaddr(struct device *dev, struct device_settings *s) { struct ifreq ifr; memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1); if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr)); } static void system_set_master(struct device *dev, int master_ifindex) { struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, }; struct nl_msg *nlm; nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST); if (!nlm) return; nlmsg_append(nlm, &ifi, sizeof(ifi), 0); nla_put_string(nlm, IFLA_IFNAME, dev->ifname); struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO); if (!linkinfo) goto failure; nla_put_string(nlm, IFLA_INFO_KIND, "dsa"); struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA); if (!infodata) goto failure; nla_put_u32(nlm, IFLA_DSA_MASTER, master_ifindex); nla_nest_end(nlm, infodata); nla_nest_end(nlm, linkinfo); system_rtnl_call(nlm); return; failure: nlmsg_free(nlm); } #endif static void ethtool_link_mode_clear_bit(__s8 nwords, int nr, __u32 *mask) { if (nr < 0) return; if (nr >= (nwords * 32)) return; mask[nr / 32] &= ~(1U << (nr % 32)); } static bool ethtool_link_mode_test_bit(__s8 nwords, int nr, const __u32 *mask) { if (nr < 0) return false; if (nr >= (nwords * 32)) return false; return !!(mask[nr / 32] & (1U << (nr % 32))); } static int system_get_ethtool_gro(struct device *dev) { struct ethtool_value ecmd; struct ifreq ifr = { .ifr_data = (caddr_t)&ecmd, }; memset(&ecmd, 0, sizeof(ecmd)); ecmd.cmd = ETHTOOL_GGRO; strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1); if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr)) return -1; return ecmd.data; } static void system_set_ethtool_gro(struct device *dev, struct device_settings *s) { struct ethtool_value ecmd; struct ifreq ifr = { .ifr_data = (caddr_t)&ecmd, }; memset(&ecmd, 0, sizeof(ecmd)); ecmd.cmd = ETHTOOL_SGRO; ecmd.data = s->gro; strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1); ioctl(sock_ioctl, SIOCETHTOOL, &ifr); } static void system_set_ethtool_pause(struct device *dev, struct device_settings *s) { struct ethtool_pauseparam pp; struct ifreq ifr = { .ifr_data = (caddr_t)&pp, }; strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1); memset(&pp, 0, sizeof(pp)); pp.cmd = ETHTOOL_GPAUSEPARAM; if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr)) return; if (s->flags & DEV_OPT_RXPAUSE || s->flags & DEV_OPT_TXPAUSE) { pp.autoneg = AUTONEG_DISABLE; if (s->flags & DEV_OPT_PAUSE) { if (s->flags & DEV_OPT_RXPAUSE) pp.rx_pause = s->rxpause && s->pause; else pp.rx_pause = s->pause; if (s->flags & DEV_OPT_TXPAUSE) pp.tx_pause = s->txpause && s->pause; else pp.tx_pause = s->pause; } else { if (s->flags & DEV_OPT_RXPAUSE) pp.rx_pause = s->rxpause; if (s->flags & DEV_OPT_TXPAUSE) pp.tx_pause = s->txpause; } if (s->flags & DEV_OPT_ASYM_PAUSE && !s->asym_pause && (pp.rx_pause != pp.tx_pause)) pp.rx_pause = pp.tx_pause = false; } else { pp.autoneg = AUTONEG_ENABLE; /* Pause and Asym_Pause advertising bits will be set via * ETHTOOL_SLINKSETTINGS in system_set_ethtool_settings() */ } pp.cmd = ETHTOOL_SPAUSEPARAM; ioctl(sock_ioctl, SIOCETHTOOL, &ifr); } static void system_set_ethtool_eee_settings(struct device *dev, struct device_settings *s) { struct ethtool_eee eeecmd; struct ifreq ifr = { .ifr_data = (caddr_t)&eeecmd, }; memset(&eeecmd, 0, sizeof(eeecmd)); eeecmd.cmd = ETHTOOL_SEEE; eeecmd.eee_enabled = s->eee; strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1); if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) netifd_log_message(L_WARNING, "cannot set eee %d for device %s", s->eee, dev->ifname); } static void system_set_ethtool_settings(struct device *dev, struct device_settings *s) { struct { struct ethtool_link_settings req; __u32 link_mode_data[3 * 127]; } ecmd; struct ifreq ifr = { .ifr_data = (caddr_t)&ecmd, }; size_t i; __s8 nwords; __u32 *supported, *advertising; system_set_ethtool_pause(dev, s); if (s->flags & DEV_OPT_EEE) system_set_ethtool_eee_settings(dev, s); memset(&ecmd, 0, sizeof(ecmd)); ecmd.req.cmd = ETHTOOL_GLINKSETTINGS; strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1); if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 || ecmd.req.link_mode_masks_nwords >= 0 || ecmd.req.cmd != ETHTOOL_GLINKSETTINGS) return; ecmd.req.link_mode_masks_nwords = -ecmd.req.link_mode_masks_nwords; if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 || ecmd.req.link_mode_masks_nwords <= 0 || ecmd.req.cmd != ETHTOOL_GLINKSETTINGS) return; nwords = ecmd.req.link_mode_masks_nwords; supported = &ecmd.link_mode_data[0]; advertising = &ecmd.link_mode_data[nwords]; memcpy(advertising, supported, sizeof(__u32) * nwords); for (i = 0; i < ARRAY_SIZE(ethtool_modes); i++) { if (s->flags & DEV_OPT_DUPLEX) { if (s->duplex) ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_half, advertising); else ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_full, advertising); } if (!(s->flags & DEV_OPT_SPEED) || s->speed == ethtool_modes[i].speed) continue; ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_full, advertising); ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_half, advertising); } if (s->flags & DEV_OPT_PAUSE) if (!s->pause) ethtool_link_mode_clear_bit(nwords, ETHTOOL_LINK_MODE_Pause_BIT, advertising); if (s->flags & DEV_OPT_ASYM_PAUSE) if (!s->asym_pause) ethtool_link_mode_clear_bit(nwords, ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising); if (s->flags & DEV_OPT_AUTONEG) { ecmd.req.autoneg = s->autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE; if (!s->autoneg) { if (s->flags & DEV_OPT_SPEED) ecmd.req.speed = s->speed; if (s->flags & DEV_OPT_DUPLEX) ecmd.req.duplex = s->duplex ? DUPLEX_FULL : DUPLEX_HALF; } } ecmd.req.cmd = ETHTOOL_SLINKSETTINGS; ioctl(sock_ioctl, SIOCETHTOOL, &ifr); } static void system_set_ethtool_settings_after_up(struct device *dev, struct device_settings *s) { if (s->flags & DEV_OPT_GRO) system_set_ethtool_gro(dev, s); } void system_if_get_settings(struct device *dev, struct device_settings *s) { struct ifreq ifr; char buf[10]; int ret; memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1); if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) { s->mtu = ifr.ifr_mtu; s->flags |= DEV_OPT_MTU; } s->mtu6 = system_update_ipv6_mtu(dev, 0); if (s->mtu6 > 0) s->flags |= DEV_OPT_MTU6; 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; } if (!system_get_ip6segmentrouting(dev, buf, sizeof(buf))) { s->ip6segmentrouting = strtoul(buf, NULL, 0); s->flags |= DEV_OPT_IP6SEGMENTROUTING; } if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) { s->promisc = ifr.ifr_flags & IFF_PROMISC; s->flags |= DEV_OPT_PROMISC; s->multicast = ifr.ifr_flags & IFF_MULTICAST; s->flags |= DEV_OPT_MULTICAST; } if (!system_get_rpfilter(dev, buf, sizeof(buf))) { s->rpfilter = strtoul(buf, NULL, 0); s->flags |= DEV_OPT_RPFILTER; } if (!system_get_acceptlocal(dev, buf, sizeof(buf))) { s->acceptlocal = strtoul(buf, NULL, 0); s->flags |= DEV_OPT_ACCEPTLOCAL; } if (!system_get_igmpversion(dev, buf, sizeof(buf))) { s->igmpversion = strtoul(buf, NULL, 0); s->flags |= DEV_OPT_IGMPVERSION; } if (!system_get_mldversion(dev, buf, sizeof(buf))) { s->mldversion = strtoul(buf, NULL, 0); s->flags |= DEV_OPT_MLDVERSION; } if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) { s->neigh4reachabletime = strtoul(buf, NULL, 0); s->flags |= DEV_OPT_NEIGHREACHABLETIME; } if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) { s->neigh6reachabletime = strtoul(buf, NULL, 0); s->flags |= DEV_OPT_NEIGHREACHABLETIME; } if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) { s->neigh4locktime = strtol(buf, NULL, 0); s->flags |= DEV_OPT_NEIGHLOCKTIME; } if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) { s->neigh4gcstaletime = strtoul(buf, NULL, 0); s->flags |= DEV_OPT_NEIGHGCSTALETIME; } if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) { s->neigh6gcstaletime = strtoul(buf, NULL, 0); s->flags |= DEV_OPT_NEIGHGCSTALETIME; } if (!system_get_dadtransmits(dev, buf, sizeof(buf))) { s->dadtransmits = strtoul(buf, NULL, 0); s->flags |= DEV_OPT_DADTRANSMITS; } if (!system_get_sendredirects(dev, buf, sizeof(buf))) { s->sendredirects = strtoul(buf, NULL, 0); s->flags |= DEV_OPT_SENDREDIRECTS; } if (!system_get_drop_v4_unicast_in_l2_multicast(dev, buf, sizeof(buf))) { s->drop_v4_unicast_in_l2_multicast = strtoul(buf, NULL, 0); s->flags |= DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST; } if (!system_get_drop_v6_unicast_in_l2_multicast(dev, buf, sizeof(buf))) { s->drop_v6_unicast_in_l2_multicast = strtoul(buf, NULL, 0); s->flags |= DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST; } if (!system_get_drop_gratuitous_arp(dev, buf, sizeof(buf))) { s->drop_gratuitous_arp = strtoul(buf, NULL, 0); s->flags |= DEV_OPT_DROP_GRATUITOUS_ARP; } if (!system_get_drop_unsolicited_na(dev, buf, sizeof(buf))) { s->drop_unsolicited_na = strtoul(buf, NULL, 0); s->flags |= DEV_OPT_DROP_UNSOLICITED_NA; } if (!system_get_arp_accept(dev, buf, sizeof(buf))) { s->arp_accept = strtoul(buf, NULL, 0); s->flags |= DEV_OPT_ARP_ACCEPT; } ret = system_get_ethtool_gro(dev); if (ret >= 0) { s->gro = ret; s->flags |= DEV_OPT_GRO; } #if LINUX_VERSION_CODE >= KERNEL_VERSION(6,1,0) ret = system_if_get_master_ifindex(dev); if (ret >= 0) { s->master_ifindex = ret; s->flags |= DEV_OPT_MASTER; } #endif } void system_if_apply_settings(struct device *dev, struct device_settings *s, uint64_t apply_mask) { struct ifreq ifr; char buf[12]; apply_mask &= s->flags; if (apply_mask & DEV_OPT_MASTER) { #if LINUX_VERSION_CODE >= KERNEL_VERSION(6,1,0) system_set_master(dev, s->master_ifindex); if (!(apply_mask & (DEV_OPT_MACADDR | DEV_OPT_DEFAULT_MACADDR)) || dev->external) system_refresh_orig_macaddr(dev, &dev->orig_settings); #else netifd_log_message(L_WARNING, "%s Your kernel is older than linux 6.1.0, changing DSA port conduit is not supported!", dev->ifname); #endif } memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1); if (apply_mask & DEV_OPT_MTU) { ifr.ifr_mtu = s->mtu; if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0) s->flags &= ~DEV_OPT_MTU; } if (apply_mask & DEV_OPT_MTU6) { system_update_ipv6_mtu(dev, s->mtu6); } if (apply_mask & DEV_OPT_TXQUEUELEN) { ifr.ifr_qlen = s->txqueuelen; if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0) s->flags &= ~DEV_OPT_TXQUEUELEN; } if ((apply_mask & (DEV_OPT_MACADDR | DEV_OPT_DEFAULT_MACADDR)) && !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 (apply_mask & DEV_OPT_IPV6) system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1"); if (s->flags & DEV_OPT_IP6SEGMENTROUTING & apply_mask) { struct device dummy = { .ifname = "all", }; bool ip6segmentrouting = device_check_ip6segmentrouting(); system_set_ip6segmentrouting(dev, s->ip6segmentrouting ? "1" : "0"); system_set_ip6segmentrouting(&dummy, ip6segmentrouting ? "1" : "0"); } if (apply_mask & DEV_OPT_PROMISC) { if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0, !s->promisc ? IFF_PROMISC : 0) < 0) s->flags &= ~DEV_OPT_PROMISC; } if (apply_mask & DEV_OPT_RPFILTER) { snprintf(buf, sizeof(buf), "%u", s->rpfilter); system_set_rpfilter(dev, buf); } if (apply_mask & DEV_OPT_ACCEPTLOCAL) system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0"); if (apply_mask & DEV_OPT_IGMPVERSION) { snprintf(buf, sizeof(buf), "%u", s->igmpversion); system_set_igmpversion(dev, buf); } if (apply_mask & DEV_OPT_MLDVERSION) { snprintf(buf, sizeof(buf), "%u", s->mldversion); system_set_mldversion(dev, buf); } if (apply_mask & DEV_OPT_NEIGHREACHABLETIME) { snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime); system_set_neigh4reachabletime(dev, buf); snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime); system_set_neigh6reachabletime(dev, buf); } if (apply_mask & DEV_OPT_NEIGHLOCKTIME) { snprintf(buf, sizeof(buf), "%d", s->neigh4locktime); system_set_neigh4locktime(dev, buf); } if (apply_mask & DEV_OPT_NEIGHGCSTALETIME) { snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime); system_set_neigh4gcstaletime(dev, buf); snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime); system_set_neigh6gcstaletime(dev, buf); } if (apply_mask & DEV_OPT_DADTRANSMITS) { snprintf(buf, sizeof(buf), "%u", s->dadtransmits); system_set_dadtransmits(dev, buf); } if (apply_mask & DEV_OPT_MULTICAST) { if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0, !s->multicast ? IFF_MULTICAST : 0) < 0) s->flags &= ~DEV_OPT_MULTICAST; } if (apply_mask & DEV_OPT_SENDREDIRECTS) system_set_sendredirects(dev, s->sendredirects ? "1" : "0"); if (apply_mask & DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST) system_set_drop_v4_unicast_in_l2_multicast(dev, s->drop_v4_unicast_in_l2_multicast ? "1" : "0"); if (apply_mask & DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST) system_set_drop_v6_unicast_in_l2_multicast(dev, s->drop_v6_unicast_in_l2_multicast ? "1" : "0"); if (apply_mask & DEV_OPT_DROP_GRATUITOUS_ARP) system_set_drop_gratuitous_arp(dev, s->drop_gratuitous_arp ? "1" : "0"); if (apply_mask & DEV_OPT_DROP_UNSOLICITED_NA) system_set_drop_unsolicited_na(dev, s->drop_unsolicited_na ? "1" : "0"); if (apply_mask & DEV_OPT_ARP_ACCEPT) system_set_arp_accept(dev, s->arp_accept ? "1" : "0"); system_set_ethtool_settings(dev, s); } void system_if_apply_settings_after_up(struct device *dev, struct device_settings *s) { system_set_ethtool_settings_after_up(dev, s); } int system_if_up(struct device *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); } 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; system_device_update_state(chk->dev, ifi->ifi_flags, ifi->ifi_index); 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; if (chk->dev->type == &simple_device_type) device_set_present(chk->dev, false); device_set_link(chk->dev, false); chk->pending = err->error; return NL_STOP; } struct bridge_vlan_check_data { struct device *check_dev; int ifindex; int ret; bool pending; }; static void bridge_vlan_check_port(struct bridge_vlan_check_data *data, struct bridge_vlan_port *port, struct bridge_vlan_info *vinfo) { uint16_t flags = 0, diff, mask; if (port->flags & BRVLAN_F_PVID) flags |= BRIDGE_VLAN_INFO_PVID; if (port->flags & BRVLAN_F_UNTAGGED) flags |= BRIDGE_VLAN_INFO_UNTAGGED; diff = vinfo->flags ^ flags; mask = BRVLAN_F_UNTAGGED | (flags & BRIDGE_VLAN_INFO_PVID); if (diff & mask) { data->ret = 1; data->pending = false; } port->check = 1; } static void bridge_vlan_check_attr(struct bridge_vlan_check_data *data, struct rtattr *attr) { struct bridge_vlan_hotplug_port *port; struct bridge_vlan_info *vinfo; struct bridge_vlan *vlan; struct rtattr *cur; int rem = RTA_PAYLOAD(attr); int i; for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) { if (cur->rta_type != IFLA_BRIDGE_VLAN_INFO) continue; vinfo = RTA_DATA(cur); vlan = vlist_find(&data->check_dev->vlans, &vinfo->vid, vlan, node); if (!vlan) { data->ret = 1; data->pending = false; return; } for (i = 0; i < vlan->n_ports; i++) if (!vlan->ports[i].check) bridge_vlan_check_port(data, &vlan->ports[i], vinfo); list_for_each_entry(port, &vlan->hotplug_ports, list) if (!port->port.check) bridge_vlan_check_port(data, &port->port, vinfo); } } static int bridge_vlan_check_cb(struct nl_msg *msg, void *arg) { struct bridge_vlan_check_data *data = arg; struct nlmsghdr *nh = nlmsg_hdr(msg); struct ifinfomsg *ifi = NLMSG_DATA(nh); struct rtattr *attr; int rem; if (nh->nlmsg_type != RTM_NEWLINK) return NL_SKIP; if (ifi->ifi_family != AF_BRIDGE) return NL_SKIP; if (ifi->ifi_index != data->ifindex) return NL_SKIP; attr = IFLA_RTA(ifi); rem = nh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi)); while (RTA_OK(attr, rem)) { if (attr->rta_type == IFLA_AF_SPEC) bridge_vlan_check_attr(data, attr); attr = RTA_NEXT(attr, rem); } return NL_SKIP; } static int bridge_vlan_ack_cb(struct nl_msg *msg, void *arg) { struct bridge_vlan_check_data *data = arg; data->pending = false; return NL_STOP; } static int bridge_vlan_error_cb(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg) { struct bridge_vlan_check_data *data = arg; data->pending = false; return NL_STOP; } int system_bridge_vlan_check(struct device *dev, char *ifname) { struct bridge_vlan_check_data data = { .check_dev = dev, .ifindex = if_nametoindex(ifname), .ret = -1, .pending = true, }; static struct ifinfomsg ifi = { .ifi_family = AF_BRIDGE }; static struct rtattr ext_req = { .rta_type = IFLA_EXT_MASK, .rta_len = RTA_LENGTH(sizeof(uint32_t)), }; uint32_t filter = RTEXT_FILTER_BRVLAN; struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT); struct bridge_vlan *vlan; struct nl_msg *msg; int i; if (!data.ifindex) return 0; msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_DUMP); if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) || nlmsg_append(msg, &ext_req, sizeof(ext_req), NLMSG_ALIGNTO) || nlmsg_append(msg, &filter, sizeof(filter), 0)) goto free; vlist_for_each_element(&dev->vlans, vlan, node) { struct bridge_vlan_hotplug_port *port; for (i = 0; i < vlan->n_ports; i++) { if (!strcmp(vlan->ports[i].ifname, ifname)) vlan->ports[i].check = 0; else vlan->ports[i].check = -1; } list_for_each_entry(port, &vlan->hotplug_ports, list) { if (!strcmp(port->port.ifname, ifname)) port->port.check = 0; else port->port.check = -1; } } nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, bridge_vlan_check_cb, &data); nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data); nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data); nl_cb_err(cb, NL_CB_CUSTOM, bridge_vlan_error_cb, &data); if (nl_send_auto_complete(sock_rtnl, msg) < 0) goto free; data.ret = 0; while (data.pending) nl_recvmsgs(sock_rtnl, cb); vlist_for_each_element(&dev->vlans, vlan, node) { struct bridge_vlan_hotplug_port *port; for (i = 0; i < vlan->n_ports; i++) { if (!vlan->ports[i].check) { data.ret = 1; break; } } list_for_each_entry(port, &vlan->hotplug_ports, list) { if (!port->port.check) { data.ret = 1; break; } } } free: nlmsg_free(msg); nl_cb_put(cb); return data.ret; } int system_if_check(struct device *dev) { 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; if (!cb) return ret; msg = nlmsg_alloc_simple(RTM_GETLINK, 0); if (!msg) goto out; if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) || nla_put_string(msg, IFLA_IFNAME, dev->ifname)) goto free; 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); ret = nl_send_auto_complete(sock_rtnl, msg); if (ret < 0) goto free; while (chk.pending > 0) nl_recvmsgs(sock_rtnl, cb); ret = chk.pending; free: nlmsg_free(msg); out: nl_cb_put(cb); return ret; } struct device * system_if_get_parent(struct device *dev) { char buf[64], *devname; int ifindex, iflink; if (system_get_dev_sysfs("iflink", dev->ifname, buf, sizeof(buf)) < 0) return NULL; 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; } bool system_if_force_external(const char *ifname) { struct stat s; return stat(dev_sysfs_path(ifname, "phy80211"), &s) == 0; } static const char * system_netdevtype_name(unsigned short dev_type) { size_t i; for (i = 0; i < ARRAY_SIZE(netdev_types); i++) { if (netdev_types[i].id == dev_type) return netdev_types[i].name; } /* the last key is used by default */ i = ARRAY_SIZE(netdev_types) - 1; return netdev_types[i].name; } static void system_add_devtype(struct blob_buf *b, const char *ifname) { char buf[100]; bool found = false; if (!system_get_dev_sysfs("uevent", ifname, buf, sizeof(buf))) { const char *info = "DEVTYPE="; char *context = NULL; const char *line = strtok_r(buf, "\r\n", &context); while (line != NULL) { char *index = strstr(line, info); if (index != NULL) { blobmsg_add_string(b, "devtype", index + strlen(info)); found = true; break; } line = strtok_r(NULL, "\r\n", &context); } } if (!found) { unsigned short number = 0; const char *name = NULL; if (!system_get_dev_sysfs("type", ifname, buf, sizeof(buf))) { number = strtoul(buf, NULL, 0); name = system_netdevtype_name(number); blobmsg_add_string(b, "devtype", name); } } } #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) static int32_t ethtool_feature_count(const char *ifname) { struct { struct ethtool_sset_info hdr; uint32_t buf; } req = { .hdr = { .cmd = ETHTOOL_GSSET_INFO, .sset_mask = 1 << ETH_SS_FEATURES } }; struct ifreq ifr = { .ifr_data = (void *)&req }; strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1); if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) return -1; if (!req.hdr.sset_mask) return 0; return req.buf; } static int32_t ethtool_feature_index(const char *ifname, const char *keyname) { struct ethtool_gstrings *feature_names; struct ifreq ifr = { 0 }; int32_t n_features; uint32_t i; n_features = ethtool_feature_count(ifname); if (n_features <= 0) return -1; feature_names = calloc(1, sizeof(*feature_names) + n_features * ETH_GSTRING_LEN); if (!feature_names) return -1; feature_names->cmd = ETHTOOL_GSTRINGS; feature_names->string_set = ETH_SS_FEATURES; feature_names->len = n_features; strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1); ifr.ifr_data = (void *)feature_names; if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) { free(feature_names); return -1; } for (i = 0; i < feature_names->len; i++) if (!strcmp((char *)&feature_names->data[i * ETH_GSTRING_LEN], keyname)) break; if (i >= feature_names->len) i = -1; free(feature_names); return i; } static bool ethtool_feature_value(const char *ifname, const char *keyname) { struct ethtool_get_features_block *feature_block; struct ethtool_gfeatures *feature_values; struct ifreq ifr = { 0 }; int32_t feature_idx; bool active; feature_idx = ethtool_feature_index(ifname, keyname); if (feature_idx < 0) return false; feature_values = calloc(1, sizeof(*feature_values) + sizeof(feature_values->features[0]) * DIV_ROUND_UP(feature_idx, 32)); if (!feature_values) return false; feature_values->cmd = ETHTOOL_GFEATURES; feature_values->size = DIV_ROUND_UP(feature_idx, 32); strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1); ifr.ifr_data = (void *)feature_values; if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) { free(feature_values); return false; } feature_block = &feature_values->features[feature_idx / 32]; active = feature_block->active & (1U << feature_idx % 32); free(feature_values); return active; } static void system_add_link_mode_name(struct blob_buf *b, int i, bool half) { char *buf; /* allocate string buffer large enough for the mode name and a suffix * "-F" or "-H" indicating full duplex or half duplex. */ buf = blobmsg_alloc_string_buffer(b, NULL, strlen(ethtool_modes[i].name) + 3); if (!buf) return; strcpy(buf, ethtool_modes[i].name); if (half) strcat(buf, "-H"); else strcat(buf, "-F"); blobmsg_add_string_buffer(b); } static void system_add_link_modes(__s8 nwords, struct blob_buf *b, __u32 *mask) { size_t i; for (i = 0; i < ARRAY_SIZE(ethtool_modes); i++) { if (ethtool_link_mode_test_bit(nwords, ethtool_modes[i].bit_half, mask)) system_add_link_mode_name(b, i, true); if (ethtool_link_mode_test_bit(nwords, ethtool_modes[i].bit_full, mask)) system_add_link_mode_name(b, i, false); } } static void system_add_pause_modes(__s8 nwords, struct blob_buf *b, __u32 *mask) { if (ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Pause_BIT, mask)) blobmsg_add_string(b, NULL, "pause"); if (ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Asym_Pause_BIT, mask)) blobmsg_add_string(b, NULL, "asym_pause"); } static void system_add_ethtool_pause_an(struct blob_buf *b, __s8 nwords, __u32 *advertising, __u32 *lp_advertising) { bool an_rx = false, an_tx = false; void *d; d = blobmsg_open_array(b, "negotiated"); /* Work out negotiated pause frame usage per * IEEE 802.3-2005 table 28B-3. */ if (ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Pause_BIT, advertising) && ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Pause_BIT, lp_advertising)) { an_tx = true; an_rx = true; } else if (ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising) && ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Asym_Pause_BIT, lp_advertising)) { if (ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Pause_BIT, advertising)) an_rx = true; else if (ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Pause_BIT, lp_advertising)) an_tx = true; } if (an_tx) blobmsg_add_string(b, NULL, "rx"); if (an_rx) blobmsg_add_string(b, NULL, "tx"); blobmsg_close_array(b, d); } static void system_get_ethtool_pause(struct device *dev, bool *rx_pause, bool *tx_pause, bool *pause_autoneg) { struct ethtool_pauseparam pp; struct ifreq ifr = { .ifr_data = (caddr_t)&pp, }; strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1); memset(&pp, 0, sizeof(pp)); pp.cmd = ETHTOOL_GPAUSEPARAM; /* may fail */ if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == -1) { *pause_autoneg = true; return; } *rx_pause = pp.rx_pause; *tx_pause = pp.tx_pause; *pause_autoneg = pp.autoneg; } int system_if_dump_info(struct device *dev, struct blob_buf *b) { __u32 *supported, *advertising, *lp_advertising; bool rx_pause, tx_pause, pause_autoneg; struct { struct ethtool_link_settings req; __u32 link_mode_data[3 * 127]; } ecmd; struct ifreq ifr = { .ifr_data = (caddr_t)&ecmd, }; __s8 nwords; void *c, *d; char *s; system_get_ethtool_pause(dev, &rx_pause, &tx_pause, &pause_autoneg); memset(&ecmd, 0, sizeof(ecmd)); ecmd.req.cmd = ETHTOOL_GLINKSETTINGS; strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1); if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 || ecmd.req.link_mode_masks_nwords >= 0 || ecmd.req.cmd != ETHTOOL_GLINKSETTINGS) return -EOPNOTSUPP; ecmd.req.link_mode_masks_nwords = -ecmd.req.link_mode_masks_nwords; if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 || ecmd.req.link_mode_masks_nwords <= 0 || ecmd.req.cmd != ETHTOOL_GLINKSETTINGS) return -EIO; nwords = ecmd.req.link_mode_masks_nwords; supported = &ecmd.link_mode_data[0]; advertising = &ecmd.link_mode_data[nwords]; lp_advertising = &ecmd.link_mode_data[2 * nwords]; c = blobmsg_open_array(b, "link-advertising"); system_add_link_modes(nwords, b, advertising); blobmsg_close_array(b, c); c = blobmsg_open_array(b, "link-partner-advertising"); system_add_link_modes(nwords, b, lp_advertising); blobmsg_close_array(b, c); c = blobmsg_open_array(b, "link-supported"); system_add_link_modes(nwords, b, supported); blobmsg_close_array(b, c); if (ethtool_validate_speed(ecmd.req.speed) && (ecmd.req.speed != (__u32)SPEED_UNKNOWN) && (ecmd.req.speed != 0)) { s = blobmsg_alloc_string_buffer(b, "speed", 10); snprintf(s, 8, "%d%c", ecmd.req.speed, ecmd.req.duplex == DUPLEX_HALF ? 'H' : 'F'); blobmsg_add_string_buffer(b); } blobmsg_add_u8(b, "autoneg", !!ecmd.req.autoneg); c = blobmsg_open_table(b, "flow-control"); blobmsg_add_u8(b, "autoneg", pause_autoneg); d = blobmsg_open_array(b, "supported"); system_add_pause_modes(nwords, b, supported); blobmsg_close_array(b, d); if (pause_autoneg) { d = blobmsg_open_array(b, "link-advertising"); system_add_pause_modes(nwords, b, advertising); blobmsg_close_array(b, d); } d = blobmsg_open_array(b, "link-partner-advertising"); system_add_pause_modes(nwords, b, lp_advertising); blobmsg_close_array(b, d); if (pause_autoneg) { system_add_ethtool_pause_an(b, nwords, advertising, lp_advertising); } else { d = blobmsg_open_array(b, "selected"); if (rx_pause) blobmsg_add_string(b, NULL, "rx"); if (tx_pause) blobmsg_add_string(b, NULL, "tx"); blobmsg_close_array(b, d); } blobmsg_close_table(b, c); blobmsg_add_u8(b, "hw-tc-offload", ethtool_feature_value(dev->ifname, "hw-tc-offload")); system_add_devtype(b, dev->ifname); 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", }; int stats_dir; size_t i; uint64_t val = 0; stats_dir = open(dev_sysfs_path(dev->ifname, "statistics"), 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) { 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; 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) { nlmsg_free(msg); return -1; } else if (valid > UINT32_MAX) valid = UINT32_MAX; cinfo.ifa_valid = valid; } nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo); if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK)) nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE); } return system_rtnl_call(msg); } int system_add_address(struct device *dev, struct device_addr *addr) { return system_addr(dev, addr, RTM_NEWADDR); } int system_del_address(struct device *dev, struct device_addr *addr) { return system_addr(dev, addr, RTM_DELADDR); } static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd) { int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16; unsigned int flags = 0; struct ndmsg ndm = { .ndm_family = (alen == 4) ? AF_INET : AF_INET6, .ndm_ifindex = dev->ifindex, .ndm_state = NUD_PERMANENT, .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0), }; struct nl_msg *msg; if (cmd == RTM_NEWNEIGH) flags |= NLM_F_CREATE | NLM_F_REPLACE; msg = nlmsg_alloc_simple(cmd, flags); if (!msg) return -1; nlmsg_append(msg, &ndm, sizeof(ndm), 0); nla_put(msg, NDA_DST, alen, &neighbor->addr); if (neighbor->flags & DEVNEIGH_MAC) nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr); return system_rtnl_call(msg); } int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor) { return system_neigh(dev, neighbor, RTM_NEWNEIGH); } int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor) { return system_neigh(dev, neighbor, RTM_DELNEIGH); } static int system_rt(struct device *dev, struct device_route *route, int cmd) { 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; else have_gw = route->nexthop.in6.s6_addr32[0] || route->nexthop.in6.s6_addr32[1] || route->nexthop.in6.s6_addr32[2] || route->nexthop.in6.s6_addr32[3]; 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_src_len = route->sourcemask, .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC, .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : 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; } 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; } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE || rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY || rtm.rtm_type == RTN_THROW) { rtm.rtm_scope = RT_SCOPE_UNIVERSE; dev = NULL; } } if (route->flags & DEVROUTE_NODEV) dev = NULL; msg = nlmsg_alloc_simple(cmd, flags); if (!msg) return -1; nlmsg_append(msg, &rtm, sizeof(rtm), 0); if (route->mask) nla_put(msg, RTA_DST, alen, &route->addr); if (route->sourcemask) { if (rtm.rtm_family == AF_INET) nla_put(msg, RTA_PREFSRC, alen, &route->source); else 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 (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_NEWROUTE); } int system_del_route(struct device *dev, struct device_route *route) { return system_rt(dev, route, RTM_DELROUTE); } int system_flush_routes(void) { const char *names[] = { "ipv4", "ipv6" }; size_t i; int fd; for (i = 0; i < ARRAY_SIZE(names); i++) { snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/route/flush", proc_path, names[i]); fd = open(dev_buf, 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_proto(const char *type, unsigned int *id) { FILE *f; char *e, buf[128]; unsigned int n, proto = 256; n = strtoul(type, &e, 0); if (!*e && e != type) proto = n; else if (!strcmp(type, "unspec")) proto = RTPROT_UNSPEC; else if (!strcmp(type, "kernel")) proto = RTPROT_KERNEL; else if (!strcmp(type, "boot")) proto = RTPROT_BOOT; else if (!strcmp(type, "static")) proto = RTPROT_STATIC; else if ((f = fopen("/etc/iproute2/rt_protos", "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, type)) { proto = n; break; } } fclose(f); } if (proto > 255) return false; *id = proto; return true; } 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); } bool system_resolve_rpfilter(const char *filter, unsigned int *id) { char *e; unsigned int n; if (!strcmp(filter, "strict")) n = 1; else if (!strcmp(filter, "loose")) n = 2; else { n = strtoul(filter, &e, 0); if (*e || e == filter || n > 2) return false; } *id = n; return true; } 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; 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_SUP_PREFIXLEN) nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen); if (rule->flags & IPRULE_UIDRANGE) { struct fib_rule_uid_range uidrange = { .start = rule->uidrange_start, .end = rule->uidrange_end }; nla_put(msg, FRA_UID_RANGE, sizeof(uidrange), &uidrange); } 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 (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) - 1); ifr.ifr_ifru.ifru_data = p; return ioctl(sock_ioctl, cmd, &ifr); } #ifdef IFLA_IPTUN_MAX static int system_add_ip6_tunnel(const char *name, const unsigned int link, struct blob_attr **tb) { 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 }; struct blob_attr *cur; int ret = 0, ttl = 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); if ((cur = tb[TUNNEL_ATTR_TTL])) ttl = blobmsg_get_u32(cur); nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP); nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64); 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); } if ((cur = tb[TUNNEL_ATTR_DATA])) { struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX]; uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT; blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data, blobmsg_data(cur), blobmsg_len(cur)); if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) { char *str = blobmsg_get_string(cur); if (strcmp(str, "ignore")) { char *e; unsigned encap_limit = strtoul(str, &e, 0); if (e == str || *e || encap_limit > 255) { ret = -EINVAL; goto failure; } nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit); tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT; } } #ifdef IFLA_IPTUN_FMR_MAX if ((cur = tb_data[IPIP6_DATA_FMRS])) { struct blob_attr *rcur; unsigned rrem, fmrcnt = 0; struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS); if (!fmrs) { ret = -ENOMEM; goto failure; } blobmsg_for_each_attr(rcur, cur, rrem) { struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur; struct in6_addr ip6prefix; struct in_addr ip4prefix; unsigned ip4len, ip6len, ealen, offset; blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr, blobmsg_data(rcur), blobmsg_len(rcur)); if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) || !parse_ip_and_netmask(AF_INET6, blobmsg_data(tb_cur), &ip6prefix, &ip6len)) { ret = -EINVAL; goto failure; } if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) || !parse_ip_and_netmask(AF_INET, blobmsg_data(tb_cur), &ip4prefix, &ip4len)) { ret = -EINVAL; goto failure; } if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) { ret = -EINVAL; goto failure; } ealen = blobmsg_get_u32(tb_cur); if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) { ret = -EINVAL; goto failure; } offset = blobmsg_get_u32(tb_cur); struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt); if (!rule) { ret = -ENOMEM; goto failure; } 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 if (tun_flags) nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags); } nla_nest_end(nlm, infodata); nla_nest_end(nlm, linkinfo); return system_rtnl_call(nlm); failure: nlmsg_free(nlm); return ret; } #endif #ifdef IFLA_IPTUN_MAX #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000) static int system_add_gre_tunnel(const char *name, const char *kind, const unsigned int link, struct blob_attr **tb, bool v6) { struct nl_msg *nlm; struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, }; struct blob_attr *cur; uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT; uint16_t iflags = 0, oflags = 0; uint8_t tos = 0; int ret = 0, ttl = 0; unsigned encap_limit = 0; nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE); if (!nlm) return -1; nlmsg_append(nlm, &ifi, sizeof(ifi), 0); nla_put_string(nlm, IFLA_IFNAME, name); struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO); if (!linkinfo) { ret = -ENOMEM; goto failure; } nla_put_string(nlm, IFLA_INFO_KIND, kind); struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA); if (!infodata) { ret = -ENOMEM; goto failure; } if (link) nla_put_u32(nlm, IFLA_GRE_LINK, link); if ((cur = tb[TUNNEL_ATTR_TTL])) ttl = blobmsg_get_u32(cur); if ((cur = tb[TUNNEL_ATTR_TOS])) { char *str = blobmsg_get_string(cur); if (strcmp(str, "inherit")) { unsigned uval; if (!system_tos_aton(str, &uval)) { ret = -EINVAL; goto failure; } if (v6) flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS; else tos = uval; } else { if (v6) flags6 |= IP6_TNL_F_USE_ORIG_TCLASS; else tos = 1; } } if ((cur = tb[TUNNEL_ATTR_DATA])) { struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX]; blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data, blobmsg_data(cur), blobmsg_len(cur)); if ((cur = tb_data[GRE_DATA_IKEY])) { if ((ikey = blobmsg_get_u32(cur))) iflags |= GRE_KEY; } if ((cur = tb_data[GRE_DATA_OKEY])) { if ((okey = blobmsg_get_u32(cur))) oflags |= GRE_KEY; } if ((cur = tb_data[GRE_DATA_ICSUM])) { if (blobmsg_get_bool(cur)) iflags |= GRE_CSUM; } if ((cur = tb_data[GRE_DATA_OCSUM])) { if (blobmsg_get_bool(cur)) oflags |= GRE_CSUM; } if ((cur = tb_data[GRE_DATA_ISEQNO])) { if (blobmsg_get_bool(cur)) iflags |= GRE_SEQ; } if ((cur = tb_data[GRE_DATA_OSEQNO])) { if (blobmsg_get_bool(cur)) oflags |= GRE_SEQ; } if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) { char *str = blobmsg_get_string(cur); if (strcmp(str, "ignore")) { char *e; encap_limit = strtoul(str, &e, 0); if (e == str || *e || encap_limit > 255) { ret = -EINVAL; goto failure; } flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT; } } } if (v6) { 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_GRE_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_GRE_REMOTE, sizeof(in6buf), &in6buf); } if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT)) nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit); if (flowinfo) nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo); if (flags6) nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6); if (!ttl) ttl = 64; } else { struct in_addr inbuf; bool set_df = true; if ((cur = tb[TUNNEL_ATTR_LOCAL])) { if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) { ret = -EINVAL; goto failure; } nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf); } if ((cur = tb[TUNNEL_ATTR_REMOTE])) { if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) { ret = -EINVAL; goto failure; } nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf); if (IN_MULTICAST(ntohl(inbuf.s_addr))) { if (!okey) { okey = inbuf.s_addr; oflags |= GRE_KEY; } if (!ikey) { ikey = inbuf.s_addr; iflags |= GRE_KEY; } } } if ((cur = tb[TUNNEL_ATTR_DF])) set_df = blobmsg_get_bool(cur); if (!set_df) { /* ttl != 0 and nopmtudisc are incompatible */ if (ttl) { ret = -EINVAL; goto failure; } } else if (!ttl) ttl = 64; nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0); nla_put_u8(nlm, IFLA_GRE_TOS, tos); } if (ttl) nla_put_u8(nlm, IFLA_GRE_TTL, ttl); if (oflags) nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags); if (iflags) nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags); if (okey) nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey)); if (ikey) nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey)); nla_nest_end(nlm, infodata); nla_nest_end(nlm, linkinfo); return system_rtnl_call(nlm); failure: nlmsg_free(nlm); return ret; } #endif #ifdef IFLA_VTI_MAX static int system_add_vti_tunnel(const char *name, const char *kind, const unsigned int link, struct blob_attr **tb, bool v6) { struct nl_msg *nlm; struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, }; struct blob_attr *cur; int ret = 0; nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE); if (!nlm) return -1; nlmsg_append(nlm, &ifi, sizeof(ifi), 0); nla_put_string(nlm, IFLA_IFNAME, name); struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO); if (!linkinfo) { ret = -ENOMEM; goto failure; } nla_put_string(nlm, IFLA_INFO_KIND, kind); struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA); if (!infodata) { ret = -ENOMEM; goto failure; } if (link) nla_put_u32(nlm, IFLA_VTI_LINK, link); if (v6) { 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_VTI_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_VTI_REMOTE, sizeof(in6buf), &in6buf); } } else { struct in_addr inbuf; if ((cur = tb[TUNNEL_ATTR_LOCAL])) { if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) { ret = -EINVAL; goto failure; } nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf); } if ((cur = tb[TUNNEL_ATTR_REMOTE])) { if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) { ret = -EINVAL; goto failure; } nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf); } } if ((cur = tb[TUNNEL_ATTR_DATA])) { struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX]; uint32_t ikey = 0, okey = 0; blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data, blobmsg_data(cur), blobmsg_len(cur)); if ((cur = tb_data[VTI_DATA_IKEY])) { if ((ikey = blobmsg_get_u32(cur))) nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey)); } if ((cur = tb_data[VTI_DATA_OKEY])) { if ((okey = blobmsg_get_u32(cur))) nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey)); } } nla_nest_end(nlm, infodata); nla_nest_end(nlm, linkinfo); return system_rtnl_call(nlm); failure: nlmsg_free(nlm); return ret; } #endif #ifdef IFLA_XFRM_MAX static int system_add_xfrm_tunnel(const char *name, const char *kind, const unsigned int link, struct blob_attr **tb) { struct nl_msg *nlm; struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, }; struct blob_attr *cur; int ret = 0; nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE); if (!nlm) return -1; nlmsg_append(nlm, &ifi, sizeof(ifi), 0); nla_put_string(nlm, IFLA_IFNAME, name); struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO); if (!linkinfo) { ret = -ENOMEM; goto failure; } nla_put_string(nlm, IFLA_INFO_KIND, kind); struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA); if (!infodata) { ret = -ENOMEM; goto failure; } if (link) nla_put_u32(nlm, IFLA_XFRM_LINK, link); if ((cur = tb[TUNNEL_ATTR_DATA])) { struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX]; uint32_t if_id = 0; blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data, blobmsg_data(cur), blobmsg_len(cur)); if ((cur = tb_data[XFRM_DATA_IF_ID])) { if ((if_id = blobmsg_get_u32(cur))) nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id); } } nla_nest_end(nlm, infodata); nla_nest_end(nlm, linkinfo); return system_rtnl_call(nlm); failure: nlmsg_free(nlm); return ret; } #endif #ifdef IFLA_VXLAN_MAX static void system_vxlan_map_bool_attr(struct nl_msg *msg, struct blob_attr **tb_data, int attrtype, int vxlandatatype, bool invert) { struct blob_attr *cur; if ((cur = tb_data[vxlandatatype])) { bool val = blobmsg_get_bool(cur); if (invert) val = !val; if ((attrtype == IFLA_VXLAN_GBP) && val) nla_put_flag(msg, attrtype); else nla_put_u8(msg, attrtype, val); } } static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6) { struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX]; struct nl_msg *msg; struct nlattr *linkinfo, *data; struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, }; struct blob_attr *cur; int ret = 0; if ((cur = tb[TUNNEL_ATTR_DATA])) blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data, blobmsg_data(cur), blobmsg_len(cur)); else return -EINVAL; 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, name); if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) { struct ether_addr *ea = ether_aton(blobmsg_get_string(cur)); if (!ea) { ret = -EINVAL; goto failure; } nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea); } if ((cur = tb[TUNNEL_ATTR_MTU])) { uint32_t mtu = blobmsg_get_u32(cur); nla_put_u32(msg, IFLA_MTU, mtu); } if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) { ret = -ENOMEM; goto failure; } nla_put_string(msg, IFLA_INFO_KIND, "vxlan"); if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) { ret = -ENOMEM; goto failure; } if (link) nla_put_u32(msg, IFLA_VXLAN_LINK, link); if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) { uint32_t id = blobmsg_get_u32(cur); if (id >= (1u << 24) - 1) { ret = -EINVAL; goto failure; } nla_put_u32(msg, IFLA_VXLAN_ID, id); } if (v6) { 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(msg, IFLA_VXLAN_LOCAL6, 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(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf); } } else { struct in_addr inbuf; if ((cur = tb[TUNNEL_ATTR_LOCAL])) { if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) { ret = -EINVAL; goto failure; } nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf); } if ((cur = tb[TUNNEL_ATTR_REMOTE])) { if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) { ret = -EINVAL; goto failure; } nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf); } } uint32_t port = 4789; if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) { port = blobmsg_get_u32(cur); if (port < 1 || port > 65535) { ret = -EINVAL; goto failure; } } nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port)); if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMIN])) { struct ifla_vxlan_port_range srcports = {0,0}; uint32_t low = blobmsg_get_u32(cur); if (low < 1 || low > 65535 - 1) { ret = -EINVAL; goto failure; } srcports.low = htons((uint16_t) low); srcports.high = htons((uint16_t) (low+1)); if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMAX])) { uint32_t high = blobmsg_get_u32(cur); if (high < 1 || high > 65535) { ret = -EINVAL; goto failure; } if (high > low) srcports.high = htons((uint16_t) high); } nla_put(msg, IFLA_VXLAN_PORT_RANGE, sizeof(srcports), &srcports); } system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_CSUM, VXLAN_DATA_ATTR_TXCSUM, false); system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, VXLAN_DATA_ATTR_RXCSUM, true); system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, VXLAN_DATA_ATTR_TXCSUM, true); system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_LEARNING, VXLAN_DATA_ATTR_LEARNING, false); system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_RSC , VXLAN_DATA_ATTR_RSC, false); system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_PROXY , VXLAN_DATA_ATTR_PROXY, false); system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L2MISS , VXLAN_DATA_ATTR_L2MISS, false); system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L3MISS , VXLAN_DATA_ATTR_L3MISS, false); system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_GBP , VXLAN_DATA_ATTR_GBP, false); if ((cur = tb_data[VXLAN_DATA_ATTR_AGEING])) { uint32_t ageing = blobmsg_get_u32(cur); nla_put_u32(msg, IFLA_VXLAN_AGEING, ageing); } if ((cur = tb_data[VXLAN_DATA_ATTR_LIMIT])) { uint32_t maxaddress = blobmsg_get_u32(cur); nla_put_u32(msg, IFLA_VXLAN_LIMIT, maxaddress); } if ((cur = tb[TUNNEL_ATTR_TOS])) { char *str = blobmsg_get_string(cur); unsigned tos = 1; if (strcmp(str, "inherit")) { if (!system_tos_aton(str, &tos)) { ret = -EINVAL; goto failure; } } nla_put_u8(msg, IFLA_VXLAN_TOS, tos); } if ((cur = tb[TUNNEL_ATTR_TTL])) { uint32_t ttl = blobmsg_get_u32(cur); if (ttl < 1 || ttl > 255) { ret = -EINVAL; goto failure; } nla_put_u8(msg, IFLA_VXLAN_TTL, ttl); } nla_nest_end(msg, data); nla_nest_end(msg, linkinfo); ret = system_rtnl_call(msg); if (ret) D(SYSTEM, "Error adding vxlan '%s': %d", name, ret); return ret; failure: nlmsg_free(msg); return ret; } #endif static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb) { struct blob_attr *cur; int ret = 0; if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0) return -1; #ifdef SIOCADD6RD if ((cur = tb[TUNNEL_ATTR_DATA])) { struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX]; unsigned int mask; struct ip_tunnel_6rd p6; blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data, blobmsg_data(cur), blobmsg_len(cur)); memset(&p6, 0, sizeof(p6)); if ((cur = tb_data[SIXRD_DATA_PREFIX])) { if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur), &p6.prefix, &mask) || mask > 128) { ret = -EINVAL; goto failure; } p6.prefixlen = mask; } if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) { if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur), &p6.relay_prefix, &mask) || mask > 32) { ret = -EINVAL; goto failure; } p6.relay_prefixlen = mask; } if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) { ret = -1; goto failure; } } #endif return ret; failure: system_link_del(name); return ret; } static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb) { struct blob_attr *cur; bool set_df = true; struct ip_tunnel_parm p = { .link = link, .iph = { .version = 4, .ihl = 5, .protocol = proto, } }; 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; if ((cur = tb[TUNNEL_ATTR_DF])) set_df = blobmsg_get_bool(cur); if ((cur = tb[TUNNEL_ATTR_TTL])) p.iph.ttl = blobmsg_get_u32(cur); if ((cur = tb[TUNNEL_ATTR_TOS])) { char *str = blobmsg_get_string(cur); if (strcmp(str, "inherit")) { unsigned uval; if (!system_tos_aton(str, &uval)) return -EINVAL; p.iph.tos = uval; } else p.iph.tos = 1; } p.iph.frag_off = set_df ? htons(IP_DF) : 0; /* ttl !=0 and nopmtudisc are incompatible */ if (p.iph.ttl && p.iph.frag_off == 0) return -EINVAL; strncpy(p.name, name, sizeof(p.name) - 1); switch (p.iph.protocol) { case IPPROTO_IPIP: return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p); case IPPROTO_IPV6: return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p); default: break; } return -1; } int system_del_ip_tunnel(const struct device *dev) { return system_link_del(dev->ifname); } int system_update_ipv6_mtu(struct device *dev, int mtu) { int ret = -1; char buf[64]; int fd; fd = open(dev_sysctl_path("ipv6/conf", dev->ifname, "mtu"), O_RDWR); if (fd < 0) return ret; if (!mtu) { ssize_t len = read(fd, buf, sizeof(buf) - 1); if (len < 0) goto out; buf[len] = 0; ret = atoi(buf); } else { if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0) ret = mtu; } out: close(fd); return ret; } int system_add_ip_tunnel(const struct device *dev, struct blob_attr *attr) { struct blob_attr *tb[__TUNNEL_ATTR_MAX]; struct blob_attr *cur; const char *str; blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb, blob_data(attr), blob_len(attr)); system_link_del(dev->ifname); if (!(cur = tb[TUNNEL_ATTR_TYPE])) return -EINVAL; str = blobmsg_data(cur); unsigned int ttl = 0; if ((cur = tb[TUNNEL_ATTR_TTL])) { ttl = blobmsg_get_u32(cur); if (ttl > 255) 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")) return system_add_sit_tunnel(dev->ifname, link, tb); #ifdef IFLA_IPTUN_MAX else if (!strcmp(str, "ipip6")) { return system_add_ip6_tunnel(dev->ifname, link, tb); } else if (!strcmp(str, "greip")) { return system_add_gre_tunnel(dev->ifname, "gre", link, tb, false); } else if (!strcmp(str, "gretapip")) { return system_add_gre_tunnel(dev->ifname, "gretap", link, tb, false); } else if (!strcmp(str, "greip6")) { return system_add_gre_tunnel(dev->ifname, "ip6gre", link, tb, true); } else if (!strcmp(str, "gretapip6")) { return system_add_gre_tunnel(dev->ifname, "ip6gretap", link, tb, true); #ifdef IFLA_VTI_MAX } else if (!strcmp(str, "vtiip")) { return system_add_vti_tunnel(dev->ifname, "vti", link, tb, false); } else if (!strcmp(str, "vtiip6")) { return system_add_vti_tunnel(dev->ifname, "vti6", link, tb, true); #endif #ifdef IFLA_XFRM_MAX } else if (!strcmp(str, "xfrm")) { return system_add_xfrm_tunnel(dev->ifname, "xfrm", link, tb); #endif #ifdef IFLA_VXLAN_MAX } else if(!strcmp(str, "vxlan")) { return system_add_vxlan(dev->ifname, link, tb, false); } else if(!strcmp(str, "vxlan6")) { return system_add_vxlan(dev->ifname, link, tb, true); #endif #endif } else if (!strcmp(str, "ipip")) { return system_add_proto_tunnel(dev->ifname, IPPROTO_IPIP, link, tb); } else return -EINVAL; return 0; }