/* * 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 #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" 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 int __system_del_ip_tunnel(const char *name, struct blob_attr **tb); static char dev_buf[256]; static void handler_nl_event(struct uloop_fd *u, unsigned int events) { struct event_socket *ev = container_of(u, struct event_socket, uloop); int err; socklen_t errlen = sizeof(err); if (!u->error) { nl_recvmsgs_default(ev->sock); return; } if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen)) goto abort; switch(err) { case ENOBUFS: /* Increase rx buffer size on netlink socket */ ev->bufsize *= 2; if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0)) goto abort; /* Request full dump since some info got dropped */ struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC }; nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg)); break; default: goto abort; } u->error = false; return; abort: uloop_fd_delete(&ev->uloop); return; } static struct nl_sock * create_socket(int protocol, int groups) { struct nl_sock *sock; sock = nl_socket_alloc(); if (!sock) return NULL; if (groups) nl_join_groups(sock, groups); if (nl_connect(sock, protocol)) return NULL; return sock; } static bool create_raw_event_socket(struct event_socket *ev, int protocol, int groups, uloop_fd_handler cb, int flags) { ev->sock = create_socket(protocol, groups); if (!ev->sock) return false; ev->uloop.fd = nl_socket_get_fd(ev->sock); ev->uloop.cb = cb; if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags)) return false; return true; } static bool create_event_socket(struct event_socket *ev, int protocol, int (*cb)(struct nl_msg *msg, void *arg)) { if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB)) return false; /* Install the valid custom callback handler */ nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL); /* Disable sequence number checking on event sockets */ nl_socket_disable_seq_check(ev->sock); /* Increase rx buffer size to 65K on event sockets */ ev->bufsize = 65535; if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0)) return false; return true; } static bool 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 system_set_sysctl(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 void system_set_dev_sysctl(const char *path, const char *device, const char *val) { snprintf(dev_buf, sizeof(dev_buf), path, device); system_set_sysctl(dev_buf, val); } static void system_set_disable_ipv6(struct device *dev, const char *val) { system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val); } static void system_set_rpfilter(struct device *dev, const char *val) { system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val); } static void system_set_acceptlocal(struct device *dev, const char *val) { system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev->ifname, val); } static void system_set_igmpversion(struct device *dev, const char *val) { system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev->ifname, val); } static void system_set_mldversion(struct device *dev, const char *val) { system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev->ifname, val); } static void system_set_neigh4reachabletime(struct device *dev, const char *val) { system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev->ifname, val); } static void system_set_neigh6reachabletime(struct device *dev, const char *val) { system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev->ifname, val); } static void system_set_neigh4gcstaletime(struct device *dev, const char *val) { system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time", dev->ifname, val); } static void system_set_neigh6gcstaletime(struct device *dev, const char *val) { system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time", dev->ifname, val); } static void system_set_neigh4locktime(struct device *dev, const char *val) { system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime", dev->ifname, val); } static void system_set_dadtransmits(struct device *dev, const char *val) { system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits", dev->ifname, val); } static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val) { system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_to_unicast", dev->ifname, val); } static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val) { system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_fast_leave", dev->ifname, val); } static void system_bridge_set_hairpin_mode(struct device *dev, const char *val) { system_set_dev_sysctl("/sys/class/net/%s/brport/hairpin_mode", dev->ifname, val); } static void system_bridge_set_isolated(struct device *dev, const char *val) { system_set_dev_sysctl("/sys/class/net/%s/brport/isolated", dev->ifname, val); } static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge) { system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" : "/sys/class/net/%s/brport/multicast_router", dev->ifname, val); } static void system_bridge_set_robustness(struct device *dev, const char *val) { system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count", dev->ifname, val); system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count", dev->ifname, val); } static void system_bridge_set_query_interval(struct device *dev, const char *val) { system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval", dev->ifname, val); } static void system_bridge_set_query_response_interval(struct device *dev, const char *val) { system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval", dev->ifname, val); } static void system_bridge_set_last_member_interval(struct device *dev, const char *val) { system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval", dev->ifname, val); } static void system_bridge_set_membership_interval(struct device *dev, const char *val) { system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval", dev->ifname, val); } static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val) { system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval", dev->ifname, val); } static void system_bridge_set_startup_query_interval(struct device *dev, const char *val) { system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval", dev->ifname, val); } static void system_bridge_set_stp_state(struct device *dev, const char *val) { system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/stp_state", dev->ifname, val); } static void system_bridge_set_forward_delay(struct device *dev, const char *val) { system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/forward_delay", dev->ifname, val); } static void system_bridge_set_priority(struct device *dev, const char *val) { system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/priority", dev->ifname, val); } static void system_bridge_set_ageing_time(struct device *dev, const char *val) { system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/ageing_time", dev->ifname, val); } static void system_bridge_set_hello_time(struct device *dev, const char *val) { system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hello_time", dev->ifname, val); } static void system_bridge_set_max_age(struct device *dev, const char *val) { system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/max_age", dev->ifname, val); } static void system_bridge_set_learning(struct device *dev, const char *val) { system_set_dev_sysctl("/sys/class/net/%s/brport/learning", dev->ifname, val); } static void system_bridge_set_unicast_flood(struct device *dev, const char *val) { system_set_dev_sysctl("/sys/class/net/%s/brport/unicast_flood", dev->ifname, val); } static void system_set_sendredirects(struct device *dev, const char *val) { system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects", dev->ifname, val); } static int system_get_sysctl(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 int system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz) { snprintf(dev_buf, sizeof(dev_buf), path, device); return system_get_sysctl(dev_buf, buf, buf_sz); } static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, buf, buf_sz); } static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz) { return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/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("/proc/sys/net/ipv4/conf/%s/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("/proc/sys/net/ipv4/conf/%s/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("/proc/sys/net/ipv6/conf/%s/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("/proc/sys/net/ipv4/neigh/%s/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("/proc/sys/net/ipv6/neigh/%s/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("/proc/sys/net/ipv4/neigh/%s/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("/proc/sys/net/ipv6/neigh/%s/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("/proc/sys/net/ipv4/neigh/%s/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("/proc/sys/net/ipv6/conf/%s/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("/proc/sys/net/ipv4/conf/%s/send_redirects", dev->ifname, buf, buf_sz); } /* Evaluate netlink messages */ static int cb_rtnl_event(struct nl_msg *msg, void *arg) { struct nlmsghdr *nh = nlmsg_hdr(msg); struct nlattr *nla[__IFLA_MAX]; int link_state = 0; char buf[10]; if (nh->nlmsg_type != RTM_NEWLINK) goto out; nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL); if (!nla[IFLA_IFNAME]) goto out; struct device *dev = device_find(nla_data(nla[IFLA_IFNAME])); if (!dev) goto out; if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf))) link_state = strtoul(buf, NULL, 0); device_set_link(dev, link_state ? true : false); out: return 0; } static void handle_hotplug_msg(char *data, int size) { const char *subsystem = NULL, *interface = NULL, *interface_old = NULL; char *cur, *end, *sep; struct device *dev; int skip; bool add, move = false; if (!strncmp(data, "add@", 4)) add = true; else if (!strncmp(data, "remove@", 7)) add = false; else if (!strncmp(data, "move@", 5)) { add = true; move = true; } 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) { if (move && interface_old) goto move; else goto found; } return; move: dev = device_find(interface_old); if (!dev) goto found; if (dev->type != &simple_device_type) goto found; device_set_present(dev, false); found: dev = device_find(interface); if (!dev) return; if (dev->type != &simple_device_type) return; if (add && system_if_force_external(dev->ifname)) return; device_set_present(dev, add); } static void handle_hotplug_event(struct uloop_fd *u, unsigned int events) { struct event_socket *ev = container_of(u, struct event_socket, uloop); struct sockaddr_nl nla; unsigned char *buf = NULL; int size; int err; socklen_t errlen = sizeof(err); if (!u->error) { while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) { if (nla.nl_pid == 0) handle_hotplug_msg((char *) buf, size); free(buf); } return; } if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen)) goto abort; switch(err) { case ENOBUFS: /* Increase rx buffer size on netlink socket */ ev->bufsize *= 2; if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0)) goto abort; break; default: goto abort; } u->error = false; 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); } int system_bridge_delbr(struct device *bridge) { return ioctl(sock_ioctl, SIOCBRDELBR, 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, char *buf, int buflen) { struct stat st; snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name); if (stat(buf, &st) < 0) return false; return true; } static char *system_get_bridge(const char *name, char *buf, int buflen) { char *path; ssize_t len = -1; glob_t gl; snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", 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 = true; if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST && !bridge->settings.multicast_to_unicast) mcast_to_ucast = false; if (!mcast_to_ucast || 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"); } int system_bridge_addif(struct device *bridge, struct device *dev) { char buf[64]; char *oldbr; int ret = 0; oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf)); if (!oldbr || strcmp(oldbr, bridge->ifname) != 0) ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL); if (dev->wireless) system_bridge_set_wireless(bridge, 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, false); } 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"); return ret; } int system_bridge_delif(struct device *bridge, struct device *dev) { return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL); } int system_if_resolve(struct device *dev) { struct ifreq 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 ifa->ifa_index == ifindex; } static bool check_route(struct nlmsghdr *hdr, int ifindex) { struct rtmsg *r = NLMSG_DATA(hdr); struct nlattr *tb[__RTA_MAX]; if (r->rtm_protocol == RTPROT_KERNEL && r->rtm_family == AF_INET6) return false; nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL); if (!tb[RTA_OIF]) return false; return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex; } static bool check_rule(struct nlmsghdr *hdr, int ifindex) { return true; } static int cb_clear_event(struct nl_msg *msg, void *arg) { struct clear_data *clr = arg; struct nlmsghdr *hdr = nlmsg_hdr(msg); bool (*cb)(struct nlmsghdr *, int ifindex); int type; switch(clr->type) { case RTM_GETADDR: type = RTM_DELADDR; if (hdr->nlmsg_type != RTM_NEWADDR) return NL_SKIP; cb = check_ifaddr; break; case RTM_GETROUTE: type = RTM_DELROUTE; if (hdr->nlmsg_type != RTM_NEWROUTE) return NL_SKIP; cb = check_route; break; case RTM_GETRULE: type = RTM_DELRULE; if (hdr->nlmsg_type != RTM_NEWRULE) return NL_SKIP; cb = check_rule; break; default: return NL_SKIP; } if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0)) return NL_SKIP; if (type == RTM_DELRULE) D(SYSTEM, "Remove a rule\n"); else D(SYSTEM, "Remove %s from device %s\n", type == RTM_DELADDR ? "an address" : "a route", clr->dev->ifname); memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len); hdr = nlmsg_hdr(clr->msg); hdr->nlmsg_type = type; hdr->nlmsg_flags = NLM_F_REQUEST; nl_socket_disable_auto_ack(sock_rtnl); nl_send_auto_complete(sock_rtnl, clr->msg); nl_socket_enable_auto_ack(sock_rtnl); return NL_SKIP; } static int cb_finish_event(struct nl_msg *msg, void *arg) { int *pending = arg; *pending = 0; return NL_STOP; } static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg) { int *pending = arg; *pending = err->error; return NL_STOP; } static void system_if_clear_entries(struct device *dev, int type, int af) { struct clear_data clr; struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT); struct rtmsg rtm = { .rtm_family = af, .rtm_flags = RTM_F_CLONED, }; int flags = NLM_F_DUMP; int pending = 1; clr.af = af; clr.dev = dev; clr.type = type; switch (type) { case RTM_GETADDR: case RTM_GETRULE: clr.size = sizeof(struct rtgenmsg); break; case RTM_GETROUTE: clr.size = sizeof(struct rtmsg); break; default: return; } if (!cb) return; clr.msg = nlmsg_alloc_simple(type, flags); if (!clr.msg) goto out; nlmsg_append(clr.msg, &rtm, clr.size, 0); nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr); nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending); nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending); nl_send_auto_complete(sock_rtnl, clr.msg); while (pending > 0) nl_recvmsgs(sock_rtnl, cb); nlmsg_free(clr.msg); out: nl_cb_put(cb); } /* * Clear bridge (membership) state and bring down device */ void system_if_clear_state(struct device *dev) { 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, buf, sizeof(buf))) { D(SYSTEM, "Delete existing bridge named '%s'\n", 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'\n", dev->ifname, bridge); system_bridge_if(bridge, dev, SIOCBRDELIF, NULL); } system_if_clear_entries(dev, RTM_GETROUTE, AF_INET); system_if_clear_entries(dev, RTM_GETADDR, AF_INET); system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6); system_if_clear_entries(dev, RTM_GETADDR, AF_INET6); system_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; } static void system_bridge_conf_multicast_deps(struct device *bridge, struct bridge_config *cfg, char *buf, int buf_len) { int val; 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; snprintf(buf, buf_len, "%i", val); system_bridge_set_membership_interval(bridge, buf); val = cfg->robustness * cfg->query_interval + cfg->query_response_interval / 2; snprintf(buf, buf_len, "%i", val); system_bridge_set_other_querier_timeout(bridge, buf); } if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) { val = cfg->query_interval / 4; snprintf(buf, buf_len, "%i", val); system_bridge_set_startup_query_interval(bridge, buf); } } static void system_bridge_conf_multicast(struct device *bridge, struct bridge_config *cfg, char *buf, int buf_len) { system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping", bridge->ifname, cfg->igmp_snoop ? "1" : "0"); system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier", bridge->ifname, cfg->multicast_querier ? "1" : "0"); snprintf(buf, buf_len, "%i", cfg->hash_max); system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max", bridge->ifname, buf); if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) { snprintf(buf, buf_len, "%u", bridge->settings.multicast_router); system_bridge_set_multicast_router(bridge, buf, true); } if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) { snprintf(buf, buf_len, "%i", cfg->robustness); system_bridge_set_robustness(bridge, buf); } if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) { snprintf(buf, buf_len, "%i", cfg->query_interval); system_bridge_set_query_interval(bridge, buf); } if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) { snprintf(buf, buf_len, "%i", cfg->query_response_interval); system_bridge_set_query_response_interval(bridge, buf); } if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) { snprintf(buf, buf_len, "%i", cfg->last_member_interval); system_bridge_set_last_member_interval(bridge, buf); } system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len); } int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg) { char buf[64]; if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0) return -1; system_bridge_set_stp_state(bridge, cfg->stp ? "1" : "0"); snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->forward_delay)); system_bridge_set_forward_delay(bridge, buf); system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf)); snprintf(buf, sizeof(buf), "%d", cfg->priority); system_bridge_set_priority(bridge, buf); if (cfg->flags & BRIDGE_OPT_AGEING_TIME) { snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->ageing_time)); system_bridge_set_ageing_time(bridge, buf); } if (cfg->flags & BRIDGE_OPT_HELLO_TIME) { snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->hello_time)); system_bridge_set_hello_time(bridge, buf); } if (cfg->flags & BRIDGE_OPT_MAX_AGE) { snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->max_age)); system_bridge_set_max_age(bridge, buf); } return 0; } int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg) { struct nl_msg *msg; struct nlattr *linkinfo, *data; struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, }; int i, rv; static const struct { const char *name; enum macvlan_mode val; } modes[] = { { "private", MACVLAN_MODE_PRIVATE }, { "vepa", MACVLAN_MODE_VEPA }, { "bridge", MACVLAN_MODE_BRIDGE }, { "passthru", MACVLAN_MODE_PASSTHRU }, }; msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL); if (!msg) return -1; nlmsg_append(msg, &iim, sizeof(iim), 0); if (cfg->flags & MACVLAN_OPT_MACADDR) nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr); nla_put_string(msg, IFLA_IFNAME, macvlan->ifname); nla_put_u32(msg, IFLA_LINK, 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\n", macvlan->ifname, dev->ifname, rv); return rv; nla_put_failure: nlmsg_free(msg); return -ENOMEM; } static int system_link_del(const char *ifname) { struct nl_msg *msg; struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, .ifi_index = 0, }; msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST); if (!msg) return -1; nlmsg_append(msg, &iim, sizeof(iim), 0); nla_put_string(msg, IFLA_IFNAME, ifname); return system_rtnl_call(msg); } int system_macvlan_del(struct device *macvlan) { return system_link_del(macvlan->ifname); } int system_veth_add(struct device *veth, struct veth_config *cfg) { struct nl_msg *msg; struct ifinfomsg empty_iim = {}; 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\n", veth->ifname, cfg->peer_name, rv); else D(SYSTEM, "Error adding veth '%s': %d\n", 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; struct ifinfomsg iim = { .ifi_family = AF_UNSPEC }; 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 nla_nest_end(msg, data); nla_nest_end(msg, linkinfo); rv = system_rtnl_call(msg); if (rv) D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv); return rv; nla_put_failure: nlmsg_free(msg); return -ENOMEM; } int system_vlandev_del(struct device *vlandev) { return system_link_del(vlandev->ifname); } void system_if_get_settings(struct device *dev, struct device_settings *s) { struct ifreq ifr; char buf[10]; memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 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 (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; } } void system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask) { struct ifreq ifr; char buf[12]; memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1); if (s->flags & DEV_OPT_MTU & apply_mask) { ifr.ifr_mtu = s->mtu; if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0) s->flags &= ~DEV_OPT_MTU; } if (s->flags & DEV_OPT_MTU6 & apply_mask) { system_update_ipv6_mtu(dev, s->mtu6); } if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) { ifr.ifr_qlen = s->txqueuelen; if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0) s->flags &= ~DEV_OPT_TXQUEUELEN; } if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) { ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER; memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr)); if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0) s->flags &= ~DEV_OPT_MACADDR; } if (s->flags & DEV_OPT_IPV6 & apply_mask) system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1"); if (s->flags & DEV_OPT_PROMISC & apply_mask) { if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0, !s->promisc ? IFF_PROMISC : 0) < 0) s->flags &= ~DEV_OPT_PROMISC; } if (s->flags & DEV_OPT_RPFILTER & apply_mask) { snprintf(buf, sizeof(buf), "%u", s->rpfilter); system_set_rpfilter(dev, buf); } if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask) system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0"); if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) { snprintf(buf, sizeof(buf), "%u", s->igmpversion); system_set_igmpversion(dev, buf); } if (s->flags & DEV_OPT_MLDVERSION & apply_mask) { snprintf(buf, sizeof(buf), "%u", s->mldversion); system_set_mldversion(dev, buf); } if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) { 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 (s->flags & DEV_OPT_NEIGHLOCKTIME & apply_mask) { snprintf(buf, sizeof(buf), "%d", s->neigh4locktime); system_set_neigh4locktime(dev, buf); } if (s->flags & DEV_OPT_NEIGHGCSTALETIME & apply_mask) { 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 (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) { snprintf(buf, sizeof(buf), "%u", s->dadtransmits); system_set_dadtransmits(dev, buf); } if (s->flags & DEV_OPT_MULTICAST & apply_mask) { if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0, !s->multicast ? IFF_MULTICAST : 0) < 0) s->flags &= ~DEV_OPT_MULTICAST; } if (s->flags & DEV_OPT_SENDREDIRECTS & apply_mask) system_set_sendredirects(dev, s->sendredirects ? "1" : "0"); } int system_if_up(struct device *dev) { system_if_get_settings(dev, &dev->orig_settings); /* Only keep orig settings based on what needs to be set */ dev->orig_settings.valid_flags = dev->orig_settings.flags; dev->orig_settings.flags &= dev->settings.flags; system_if_apply_settings(dev, &dev->settings, dev->settings.flags); return system_if_flags(dev->ifname, IFF_UP, 0); } int system_if_down(struct device *dev) { int ret = system_if_flags(dev->ifname, 0, IFF_UP); system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags); return ret; } struct if_check_data { struct device *dev; int pending; int ret; }; #ifndef IFF_LOWER_UP #define IFF_LOWER_UP 0x10000 #endif static int cb_if_check_valid(struct nl_msg *msg, void *arg) { struct nlmsghdr *nh = nlmsg_hdr(msg); struct ifinfomsg *ifi = NLMSG_DATA(nh); struct if_check_data *chk = (struct if_check_data *)arg; if (nh->nlmsg_type != RTM_NEWLINK) return NL_SKIP; device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false); device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false); return NL_OK; } static int cb_if_check_ack(struct nl_msg *msg, void *arg) { struct if_check_data *chk = (struct if_check_data *)arg; chk->pending = 0; return NL_STOP; } static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg) { struct if_check_data *chk = (struct if_check_data *)arg; device_set_present(chk->dev, false); device_set_link(chk->dev, false); chk->pending = err->error; return NL_STOP; } int system_if_check(struct device *dev) { 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); nl_send_auto_complete(sock_rtnl, msg); 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, len; FILE *f; snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname); f = fopen(buf, "r"); if (!f) return NULL; len = fread(buf, 1, sizeof(buf) - 1, f); fclose(f); if (len <= 0) return NULL; buf[len] = 0; iflink = strtoul(buf, NULL, 0); ifindex = system_if_resolve(dev); if (!iflink || iflink == ifindex) return NULL; devname = if_indextoname(iflink, buf); if (!devname) return NULL; return device_get(devname, true); } static bool read_string_file(int dir_fd, const char *file, char *buf, int len) { bool ret = false; char *c; int fd; fd = openat(dir_fd, file, O_RDONLY); if (fd < 0) return false; retry: len = read(fd, buf, len - 1); if (len < 0) { if (errno == EINTR) goto retry; } else if (len > 0) { buf[len] = 0; c = strchr(buf, '\n'); if (c) *c = 0; ret = true; } close(fd); return ret; } static bool read_uint64_file(int dir_fd, const char *file, uint64_t *val) { char buf[64]; bool ret = false; ret = read_string_file(dir_fd, file, buf, sizeof(buf)); if (ret) *val = strtoull(buf, NULL, 0); return ret; } /* Assume advertised flags == supported flags */ static const struct { uint32_t mask; const char *name; } ethtool_link_modes[] = { { ADVERTISED_10baseT_Half, "10baseT-H" }, { ADVERTISED_10baseT_Full, "10baseT-F" }, { ADVERTISED_100baseT_Half, "100baseT-H" }, { ADVERTISED_100baseT_Full, "100baseT-F" }, { ADVERTISED_1000baseT_Half, "1000baseT-H" }, { ADVERTISED_1000baseT_Full, "1000baseT-F" }, { ADVERTISED_1000baseKX_Full, "1000baseKX-F" }, { ADVERTISED_2500baseX_Full, "2500baseX-F" }, { ADVERTISED_10000baseT_Full, "10000baseT-F" }, { ADVERTISED_10000baseKX4_Full, "10000baseKX4-F" }, { ADVERTISED_10000baseKR_Full, "10000baseKR-F" }, { ADVERTISED_20000baseMLD2_Full, "20000baseMLD2-F" }, { ADVERTISED_20000baseKR2_Full, "20000baseKR2-F" }, { ADVERTISED_40000baseKR4_Full, "40000baseKR4-F" }, { ADVERTISED_40000baseCR4_Full, "40000baseCR4-F" }, { ADVERTISED_40000baseSR4_Full, "40000baseSR4-F" }, { ADVERTISED_40000baseLR4_Full, "40000baseLR4-F" }, #ifdef ADVERTISED_56000baseKR4_Full { ADVERTISED_56000baseKR4_Full, "56000baseKR4-F" }, { ADVERTISED_56000baseCR4_Full, "56000baseCR4-F" }, { ADVERTISED_56000baseSR4_Full, "56000baseSR4-F" }, { ADVERTISED_56000baseLR4_Full, "56000baseLR4-F" }, #endif }; static void system_add_link_modes(struct blob_buf *b, __u32 mask) { int i; for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) { if (mask & ethtool_link_modes[i].mask) blobmsg_add_string(b, NULL, ethtool_link_modes[i].name); } } bool system_if_force_external(const char *ifname) { char buf[64]; struct stat s; snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname); return stat(buf, &s) == 0; } int system_if_dump_info(struct device *dev, struct blob_buf *b) { struct ethtool_cmd ecmd; struct ifreq ifr; char *s; void *c; memset(&ecmd, 0, sizeof(ecmd)); memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1); ifr.ifr_data = (caddr_t) &ecmd; ecmd.cmd = ETHTOOL_GSET; if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) { c = blobmsg_open_array(b, "link-advertising"); system_add_link_modes(b, ecmd.advertising); blobmsg_close_array(b, c); c = blobmsg_open_array(b, "link-partner-advertising"); system_add_link_modes(b, ecmd.lp_advertising); blobmsg_close_array(b, c); c = blobmsg_open_array(b, "link-supported"); system_add_link_modes(b, ecmd.supported); blobmsg_close_array(b, c); s = blobmsg_alloc_string_buffer(b, "speed", 8); snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd), ecmd.duplex == DUPLEX_HALF ? 'H' : 'F'); blobmsg_add_string_buffer(b); blobmsg_add_u8(b, "autoneg", !!ecmd.autoneg); } return 0; } int system_if_dump_stats(struct device *dev, struct blob_buf *b) { const char *const counters[] = { "collisions", "rx_frame_errors", "tx_compressed", "multicast", "rx_length_errors", "tx_dropped", "rx_bytes", "rx_missed_errors", "tx_errors", "rx_compressed", "rx_over_errors", "tx_fifo_errors", "rx_crc_errors", "rx_packets", "tx_heartbeat_errors", "rx_dropped", "tx_aborted_errors", "tx_packets", "rx_errors", "tx_bytes", "tx_window_errors", "rx_fifo_errors", "tx_carrier_errors", }; char buf[64]; int stats_dir; int i; uint64_t val = 0; snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname); stats_dir = open(buf, O_DIRECTORY); if (stats_dir < 0) return -1; for (i = 0; i < ARRAY_SIZE(counters); i++) if (read_uint64_file(stats_dir, counters[i], &val)) blobmsg_add_u64(b, counters[i], val); close(stats_dir); return 0; } static int system_addr(struct device *dev, struct device_addr *addr, int cmd) { 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 (!dev) return 1; 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; } } 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[] = { "/proc/sys/net/ipv4/route/flush", "/proc/sys/net/ipv6/route/flush" }; int fd, i; for (i = 0; i < ARRAY_SIZE(names); i++) { fd = open(names[i], O_WRONLY); if (fd < 0) continue; if (write(fd, "-1", 2)) {} close(fd); } return 0; } bool system_resolve_rt_type(const char *type, unsigned int *id) { return system_rtn_aton(type, id); } bool system_resolve_rt_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_GOTO) nla_put_u32(msg, FRA_GOTO, rule->gotoid); return system_rtnl_call(msg); } int system_add_iprule(struct iprule *rule) { return system_iprule(rule, RTM_NEWRULE); } int system_del_iprule(struct iprule *rule) { return system_iprule(rule, RTM_DELRULE); } int system_flush_iprules(void) { int rv = 0; struct iprule rule; system_if_clear_entries(NULL, RTM_GETRULE, AF_INET); system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6); memset(&rule, 0, sizeof(rule)); rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP; rule.priority = 0; rule.lookup = RT_TABLE_LOCAL; rv |= system_iprule(&rule, RTM_NEWRULE); rule.priority = 32766; rule.lookup = RT_TABLE_MAIN; rv |= system_iprule(&rule, RTM_NEWRULE); rule.priority = 32767; rule.lookup = RT_TABLE_DEFAULT; rv |= system_iprule(&rule, RTM_NEWRULE); rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP; rule.priority = 0; rule.lookup = RT_TABLE_LOCAL; rv |= system_iprule(&rule, RTM_NEWRULE); rule.priority = 32766; rule.lookup = RT_TABLE_MAIN; rv |= system_iprule(&rule, RTM_NEWRULE); return rv; } bool system_resolve_iprule_action(const char *action, unsigned int *id) { return system_rtn_aton(action, id); } time_t system_get_rtime(void) { struct timespec ts; struct timeval tv; if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0) return ts.tv_sec; if (gettimeofday(&tv, NULL) == 0) return tv.tv_sec; return 0; } #ifndef IP_DF #define IP_DF 0x4000 #endif static int tunnel_ioctl(const char *name, int cmd, void *p) { struct ifreq ifr; memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 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_ACK | NLM_F_CREATE | NLM_F_EXCL); 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 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_RXCSUM])) { bool rxcsum = blobmsg_get_bool(cur); nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, !rxcsum); } if ((cur = tb_data[VXLAN_DATA_ATTR_TXCSUM])) { bool txcsum = blobmsg_get_bool(cur); nla_put_u8(msg, IFLA_VXLAN_UDP_CSUM, txcsum); nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, !txcsum); } 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\n", 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_del_ip_tunnel(name, tb); 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; } static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb) { struct blob_attr *cur; const char *str; if (!(cur = tb[TUNNEL_ATTR_TYPE])) return -EINVAL; str = blobmsg_data(cur); if (!strcmp(str, "greip") || !strcmp(str, "gretapip") || !strcmp(str, "greip6") || !strcmp(str, "gretapip6") || !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") || !strcmp(str, "vxlan") || !strcmp(str, "vxlan6")) return system_link_del(name); else return tunnel_ioctl(name, SIOCDELTUNNEL, NULL); } int system_del_ip_tunnel(const char *name, struct blob_attr *attr) { struct blob_attr *tb[__TUNNEL_ATTR_MAX]; blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb, blob_data(attr), blob_len(attr)); return __system_del_ip_tunnel(name, tb); } int system_update_ipv6_mtu(struct device *dev, int mtu) { int ret = -1; char buf[64]; int fd; snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu", dev->ifname); fd = open(buf, 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 char *name, 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_del_ip_tunnel(name, tb); 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(name, link, tb); #ifdef IFLA_IPTUN_MAX else if (!strcmp(str, "ipip6")) { return system_add_ip6_tunnel(name, link, tb); } else if (!strcmp(str, "greip")) { return system_add_gre_tunnel(name, "gre", link, tb, false); } else if (!strcmp(str, "gretapip")) { return system_add_gre_tunnel(name, "gretap", link, tb, false); } else if (!strcmp(str, "greip6")) { return system_add_gre_tunnel(name, "ip6gre", link, tb, true); } else if (!strcmp(str, "gretapip6")) { return system_add_gre_tunnel(name, "ip6gretap", link, tb, true); #ifdef IFLA_VTI_MAX } else if (!strcmp(str, "vtiip")) { return system_add_vti_tunnel(name, "vti", link, tb, false); } else if (!strcmp(str, "vtiip6")) { return system_add_vti_tunnel(name, "vti6", link, tb, true); #endif #ifdef IFLA_XFRM_MAX } else if (!strcmp(str, "xfrm")) { return system_add_xfrm_tunnel(name, "xfrm", link, tb); #endif #ifdef IFLA_VXLAN_MAX } else if(!strcmp(str, "vxlan")) { return system_add_vxlan(name, link, tb, false); } else if(!strcmp(str, "vxlan6")) { return system_add_vxlan(name, link, tb, true); #endif #endif } else if (!strcmp(str, "ipip")) { return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb); } else return -EINVAL; return 0; }