#include #include #include #include #include #include "netifd.h" #include "device.h" #include "interface.h" #include "interface-ip.h" #include "proto.h" #include "ubus.h" #include "system.h" enum { ROUTE_INTERFACE, ROUTE_TARGET, ROUTE_MASK, ROUTE_GATEWAY, ROUTE_METRIC, ROUTE_MTU, __ROUTE_MAX }; static const struct blobmsg_policy route_attr[__ROUTE_MAX] = { [ROUTE_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING }, [ROUTE_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING }, [ROUTE_MASK] = { .name = "netmask", .type = BLOBMSG_TYPE_STRING }, [ROUTE_GATEWAY] = { .name = "gateway", .type = BLOBMSG_TYPE_STRING }, [ROUTE_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 }, [ROUTE_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 }, }; const struct config_param_list route_attr_list = { .n_params = __ROUTE_MAX, .params = route_attr, }; void interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6) { struct interface_ip_settings *ip; struct blob_attr *tb[__ROUTE_MAX], *cur; struct device_route *route; int af = v6 ? AF_INET6 : AF_INET; blobmsg_parse(route_attr, __ROUTE_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr)); if (!iface) { if ((cur = tb[ROUTE_INTERFACE]) == NULL) return; iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node); if (!iface) return; ip = &iface->config_ip; } else { ip = &iface->proto_ip; } route = calloc(1, sizeof(*route)); if (!route) return; route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4; route->mask = v6 ? 128 : 32; if ((cur = tb[ROUTE_MASK]) != NULL) { route->mask = parse_netmask_string(blobmsg_data(cur), v6); if (route->mask > (v6 ? 128 : 32)) goto error; } if ((cur = tb[ROUTE_TARGET]) != NULL) { if (!inet_pton(af, blobmsg_data(cur), &route->addr)) { DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur)); goto error; } } if ((cur = tb[ROUTE_GATEWAY]) != NULL) { if (!inet_pton(af, blobmsg_data(cur), &route->nexthop)) { DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur)); goto error; } } if ((cur = tb[ROUTE_METRIC]) != NULL) { route->metric = blobmsg_get_u32(cur); route->flags |= DEVROUTE_METRIC; } if ((cur = tb[ROUTE_MTU]) != NULL) route->mtu = blobmsg_get_u32(cur); vlist_add(&ip->route, &route->node, &route->flags); return; error: free(route); } static int addr_cmp(const void *k1, const void *k2, void *ptr) { return memcmp(k1, k2, sizeof(struct device_addr) - offsetof(struct device_addr, flags)); } static int route_cmp(const void *k1, const void *k2, void *ptr) { return memcmp(k1, k2, sizeof(struct device_route) - offsetof(struct device_route, flags)); } static void interface_update_proto_addr(struct vlist_tree *tree, struct vlist_node *node_new, struct vlist_node *node_old) { struct interface_ip_settings *ip; struct interface *iface; struct device *dev; struct device_addr *a_new = NULL, *a_old = NULL; bool keep = false; ip = container_of(tree, struct interface_ip_settings, addr); iface = ip->iface; dev = iface->l3_dev.dev; if (node_new) { a_new = container_of(node_new, struct device_addr, node); if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 && !a_new->broadcast) { uint32_t mask = ~0; uint32_t *a = (uint32_t *) &a_new->addr; mask >>= a_new->mask; a_new->broadcast = *a | mask; } } if (node_old) a_old = container_of(node_old, struct device_addr, node); if (a_new && a_old) { keep = true; if (a_old->flags != a_new->flags) keep = false; if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 && a_new->broadcast != a_old->broadcast) keep = false; } if (node_old) { if (!(a_old->flags & DEVADDR_EXTERNAL) && a_old->enabled && !keep) system_del_address(dev, a_old); free(a_old); } if (node_new) { if (!(a_new->flags & DEVADDR_EXTERNAL) && !keep) system_add_address(dev, a_new); a_new->enabled = true; } } static bool enable_route(struct interface_ip_settings *ip, struct device_route *route) { if (ip->no_defaultroute && !route->mask) return false; return ip->enabled; } static void interface_update_proto_route(struct vlist_tree *tree, struct vlist_node *node_new, struct vlist_node *node_old) { struct interface_ip_settings *ip; struct interface *iface; struct device *dev; struct device_route *route_old, *route_new; bool keep = false; ip = container_of(tree, struct interface_ip_settings, route); iface = ip->iface; dev = iface->l3_dev.dev; route_old = container_of(node_old, struct device_route, node); route_new = container_of(node_new, struct device_route, node); if (node_old && node_new) keep = !memcmp(&route_old->nexthop, &route_new->nexthop, sizeof(route_old->nexthop)); if (node_old) { if (!(route_old->flags & DEVADDR_EXTERNAL) && route_old->enabled && !keep) system_del_route(dev, route_old); free(route_old); } if (node_new) { bool _enabled = enable_route(ip, route_new); if (!(route_new->flags & DEVADDR_EXTERNAL) && !keep && _enabled) system_add_route(dev, route_new); route_new->enabled = _enabled; } } void interface_add_dns_server(struct interface_ip_settings *ip, const char *str) { struct dns_server *s; s = calloc(1, sizeof(*s)); s->af = AF_INET; if (inet_pton(s->af, str, &s->addr.in)) goto add; s->af = AF_INET6; if (inet_pton(s->af, str, &s->addr.in)) goto add; free(s); return; add: D(INTERFACE, "Add IPv%c DNS server: %s\n", s->af == AF_INET6 ? '6' : '4', str); vlist_simple_add(&ip->dns_servers, &s->node); } void interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list) { struct blob_attr *cur; int rem; blobmsg_for_each_attr(cur, list, rem) { if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING) continue; if (!blobmsg_check_attr(cur, NULL)) continue; interface_add_dns_server(ip, blobmsg_data(cur)); } } static void interface_add_dns_search_domain(struct interface_ip_settings *ip, const char *str) { struct dns_search_domain *s; int len = strlen(str); s = calloc(1, sizeof(*s) + len + 1); if (!s) return; D(INTERFACE, "Add DNS search domain: %s\n", str); memcpy(s->name, str, len); vlist_simple_add(&ip->dns_search, &s->node); } void interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list) { struct blob_attr *cur; int rem; blobmsg_for_each_attr(cur, list, rem) { if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING) continue; if (!blobmsg_check_attr(cur, NULL)) continue; interface_add_dns_search_domain(ip, blobmsg_data(cur)); } } static void write_resolv_conf_entries(FILE *f, struct interface_ip_settings *ip) { struct dns_server *s; struct dns_search_domain *d; const char *str; char buf[32]; vlist_simple_for_each_element(&ip->dns_servers, s, node) { str = inet_ntop(s->af, &s->addr, buf, sizeof(buf)); if (!str) continue; fprintf(f, "nameserver %s\n", str); } vlist_simple_for_each_element(&ip->dns_search, d, node) { fprintf(f, "search %s\n", d->name); } } void interface_write_resolv_conf(void) { struct interface *iface; char *path = alloca(strlen(resolv_conf) + 5); FILE *f; sprintf(path, "%s.tmp", resolv_conf); unlink(path); f = fopen(path, "w"); if (!f) { D(INTERFACE, "Failed to open %s for writing\n", path); return; } vlist_for_each_element(&interfaces, iface, node) { if (iface->state != IFS_UP) continue; if (vlist_simple_empty(&iface->proto_ip.dns_search) && vlist_simple_empty(&iface->proto_ip.dns_servers) && vlist_simple_empty(&iface->config_ip.dns_search) && vlist_simple_empty(&iface->config_ip.dns_servers)) continue; fprintf(f, "# Interface %s\n", iface->name); write_resolv_conf_entries(f, &iface->config_ip); write_resolv_conf_entries(f, &iface->proto_ip); } fclose(f); if (rename(path, resolv_conf) < 0) { D(INTERFACE, "Failed to replace %s\n", resolv_conf); unlink(path); } } void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled) { struct device_addr *addr; struct device_route *route; struct device *dev; ip->enabled = enabled; dev = ip->iface->l3_dev.dev; if (!dev) return; vlist_for_each_element(&ip->addr, addr, node) { if (addr->enabled == enabled) continue; if (enabled) system_add_address(dev, addr); else system_del_address(dev, addr); addr->enabled = enabled; } vlist_for_each_element(&ip->route, route, node) { bool _enabled = enabled; if (!enable_route(ip, route)) _enabled = false; if (route->enabled == _enabled) continue; if (_enabled) { if (!(route->flags & DEVROUTE_METRIC)) route->metric = ip->iface->metric; system_add_route(dev, route); } else system_del_route(dev, route); route->enabled = _enabled; } } void interface_ip_update_start(struct interface_ip_settings *ip) { vlist_simple_update(&ip->dns_servers); vlist_simple_update(&ip->dns_search); vlist_update(&ip->route); vlist_update(&ip->addr); } void interface_ip_update_complete(struct interface_ip_settings *ip) { vlist_simple_flush(&ip->dns_servers); vlist_simple_flush(&ip->dns_search); vlist_flush(&ip->route); vlist_flush(&ip->addr); } void interface_ip_flush(struct interface_ip_settings *ip) { vlist_simple_flush_all(&ip->dns_servers); vlist_simple_flush_all(&ip->dns_search); vlist_flush_all(&ip->route); vlist_flush_all(&ip->addr); } void interface_ip_init(struct interface_ip_settings *ip, struct interface *iface) { ip->iface = iface; ip->enabled = true; vlist_simple_init(&ip->dns_search, struct dns_search_domain, node); vlist_simple_init(&ip->dns_servers, struct dns_server, node); vlist_init(&ip->route, route_cmp, interface_update_proto_route); vlist_init(&ip->addr, addr_cmp, interface_update_proto_addr); }