/*
* netifd - network interface daemon
* Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2012 Steven Barth <steven@midlink.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
ROUTE_GATEWAY,
ROUTE_METRIC,
ROUTE_MTU,
+ ROUTE_VALID,
+ ROUTE_TABLE,
__ROUTE_MAX
};
[ROUTE_GATEWAY] = { .name = "gateway", .type = BLOBMSG_TYPE_STRING },
[ROUTE_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 },
[ROUTE_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
+ [ROUTE_TABLE] = { .name = "table", .type = BLOBMSG_TYPE_STRING },
+ [ROUTE_VALID] = { .name = "valid", .type = BLOBMSG_TYPE_INT32 },
};
const struct config_param_list route_attr_list = {
.params = route_attr,
};
+
+struct list_head prefixes = LIST_HEAD_INIT(prefixes);
+static struct device_prefix *ula_prefix = NULL;
+static struct uloop_timeout valid_until_timeout;
+
+
static void
clear_if_addr(union if_addr *a, int mask)
{
if (!match_if_addr(&route->addr, a, route->mask))
continue;
+ if (route->flags & DEVROUTE_TABLE)
+ continue;
+
if (!*res || route->mask < (*res)->mask)
*res = route;
}
{
struct interface *iface;
struct device_route *route, *r_next = NULL;
+ bool defaultroute_target = false;
+ int addrsize = v6 ? sizeof(addr->in6) : sizeof(addr->in);
route = calloc(1, sizeof(*route));
if (!route)
route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
route->mask = v6 ? 128 : 32;
- memcpy(&route->addr, addr, v6 ? sizeof(addr->in6) : sizeof(addr->in));
+ if (memcmp(&route->addr, addr, addrsize) == 0)
+ defaultroute_target = true;
+ else
+ memcpy(&route->addr, addr, addrsize);
vlist_for_each_element(&interfaces, iface, node) {
/* look for locally addressable target first */
done:
route->iface = iface;
- vlist_add(&iface->host_routes, &route->node, &route->flags);
+ if (defaultroute_target)
+ free(route);
+ else
+ vlist_add(&iface->host_routes, &route->node, route);
return iface;
}
}
if ((cur = tb[ROUTE_TARGET]) != NULL) {
- if (!inet_pton(af, blobmsg_data(cur), &route->addr)) {
+ if (!parse_ip_and_netmask(af, blobmsg_data(cur), &route->addr, &route->mask)) {
DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur));
goto error;
}
route->flags |= DEVROUTE_METRIC;
}
- if ((cur = tb[ROUTE_MTU]) != NULL)
+ if ((cur = tb[ROUTE_MTU]) != NULL) {
route->mtu = blobmsg_get_u32(cur);
+ route->flags |= DEVROUTE_MTU;
+ }
+
+ if ((cur = tb[ROUTE_TABLE]) != NULL) {
+ if (!system_resolve_rt_table(blobmsg_data(cur), &route->table)) {
+ DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
+ goto error;
+ }
- vlist_add(&ip->route, &route->node, &route->flags);
+ if (route->table)
+ route->flags |= DEVROUTE_TABLE;
+ }
+
+ if ((cur = tb[ROUTE_VALID]) != NULL)
+ route->valid_until = system_get_rtime() + blobmsg_get_u32(cur);
+
+ vlist_add(&ip->route, &route->node, route);
return;
error:
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));
+ const struct device_route *r1 = k1, *r2 = k2;
+
+ if (r1->mask != r2->mask)
+ return r2->mask - r1->mask;
+
+ if (r1->metric != r2->metric)
+ return r1->metric - r2->metric;
+
+ if (r1->flags != r2->flags)
+ return r2->flags - r1->flags;
+
+ return memcmp(&r1->addr, &r2->addr, sizeof(r1->addr));
+}
+
+static int
+prefix_cmp(const void *k1, const void *k2, void *ptr)
+{
+ return memcmp(k1, k2, sizeof(struct device_prefix) -
+ offsetof(struct device_prefix, addr));
}
static void
struct device *dev = iface->l3_dev.dev;
struct device_route route;
+ memset(&route, 0, sizeof(route));
route.iface = iface;
route.flags = addr->flags;
route.mask = addr->mask;
route.flags |= DEVADDR_KERNEL;
system_del_route(dev, &route);
- route.flags &= ~DEVADDR_KERNEL;
- route.metric = iface->metric;
- system_add_route(dev, &route);
+ if (!(addr->flags & DEVADDR_OFFLINK)) {
+ route.flags &= ~DEVADDR_KERNEL;
+ route.metric = iface->metric;
+ system_add_route(dev, &route);
+ }
} else {
- system_del_route(dev, &route);
+ if (!(addr->flags & DEVADDR_OFFLINK))
+ system_del_route(dev, &route);
}
}
if (a_new && a_old) {
keep = true;
- if (a_old->flags != a_new->flags)
+ if (a_old->flags != a_new->flags ||
+ a_old->valid_until != a_new->valid_until ||
+ a_old->preferred_until != a_new->preferred_until)
keep = false;
if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
a_new->enabled = true;
if (!(a_new->flags & DEVADDR_EXTERNAL) && !keep) {
system_add_address(dev, a_new);
- if (iface->metric)
+ if ((a_new->flags & DEVADDR_OFFLINK) || iface->metric)
interface_handle_subnet_route(iface, a_new, true);
}
}
system_add_route(dev, route_new);
}
+
+static void
+interface_set_prefix_address(struct device_prefix_assignment *assignment,
+ const struct device_prefix *prefix, struct interface *iface, bool add);
+
+static void interface_trigger_ula_prefix(struct interface *iface,
+ const struct device_prefix *prefix, bool enable)
+{
+ if (prefix == ula_prefix || (prefix->addr.s6_addr[0] & 0xfe) != 0xfc)
+ return;
+
+ bool external_ula = false;
+ struct device_prefix_assignment *ula_assign = NULL;
+ struct device_prefix *c;
+ list_for_each_entry(c, &prefixes, head) {
+ if (c != ula_prefix && (c->addr.s6_addr[0] & 0xfe) != 0xfc)
+ continue;
+
+ struct device_prefix_assignment *a;
+ list_for_each_entry(a, &c->assignments, head) {
+ if (!strcmp(a->name, iface->name)) {
+ if (c == ula_prefix)
+ ula_assign = a;
+ else if (a->enabled)
+ external_ula = true;
+ }
+ }
+
+ }
+
+ // Remove ULA assignment if there is an externally managed ULA and vice versa
+ if (ula_assign && ((enable && !external_ula) || (!enable && external_ula)))
+ interface_set_prefix_address(ula_assign, ula_prefix, iface, enable);
+}
+
+
+static void
+interface_set_prefix_address(struct device_prefix_assignment *assignment,
+ const struct device_prefix *prefix, struct interface *iface, bool add)
+{
+ const struct interface *uplink = prefix->iface;
+ if (!iface->l3_dev.dev)
+ return;
+
+ struct device *l3_downlink = iface->l3_dev.dev;
+
+ struct device_addr addr;
+ memset(&addr, 0, sizeof(addr));
+ addr.addr.in6 = prefix->addr;
+ addr.addr.in6.s6_addr32[1] |= htonl(assignment->assigned);
+ addr.addr.in6.s6_addr[15] += 1;
+ addr.mask = assignment->length;
+ addr.flags = DEVADDR_INET6;
+ addr.preferred_until = prefix->preferred_until;
+ addr.valid_until = prefix->valid_until;
+
+ if (!add && assignment->enabled) {
+ time_t now = system_get_rtime();
+ addr.preferred_until = now;
+ if (!addr.valid_until || addr.valid_until - now > 7200)
+ addr.valid_until = now + 7200;
+ system_add_address(l3_downlink, &addr);
+ assignment->enabled = false;
+
+ interface_trigger_ula_prefix(iface, prefix, true);
+ } else if (add && (iface->state == IFS_UP || iface->state == IFS_SETUP)) {
+ system_add_address(l3_downlink, &addr);
+ if (uplink && uplink->l3_dev.dev) {
+ int mtu = system_update_ipv6_mtu(
+ uplink->l3_dev.dev, 0);
+ if (mtu > 0)
+ system_update_ipv6_mtu(l3_downlink, mtu);
+ }
+ assignment->enabled = true;
+
+ interface_trigger_ula_prefix(iface, prefix, false);
+ }
+}
+
+static bool interface_prefix_assign(struct list_head *list,
+ struct device_prefix_assignment *assign)
+{
+ int32_t current = 0, asize = (1 << (64 - assign->length)) - 1;
+ struct device_prefix_assignment *c;
+ list_for_each_entry(c, list, head) {
+ if (assign->assigned != -1) {
+ if (assign->assigned > current && assign->assigned + asize < c->assigned) {
+ list_add_tail(&assign->head, &c->head);
+ return true;
+ }
+ } else if (assign->assigned == -1) {
+ current = (current + asize) & (~asize);
+ if (current + asize < c->assigned) {
+ assign->assigned = current;
+ list_add_tail(&assign->head, &c->head);
+ return true;
+ }
+ }
+ current = (c->assigned + (1 << (64 - c->length)));
+ }
+ return false;
+}
+
+static void interface_update_prefix_assignments(struct device_prefix *prefix, bool setup)
+{
+ struct device_prefix_assignment *c;
+ struct interface *iface;
+
+ // Delete all assignments
+ while (!list_empty(&prefix->assignments)) {
+ c = list_first_entry(&prefix->assignments,
+ struct device_prefix_assignment, head);
+ if ((iface = vlist_find(&interfaces, c->name, iface, node)))
+ interface_set_prefix_address(c, prefix, iface, false);
+ list_del(&c->head);
+ free(c);
+ }
+
+ if (!setup)
+ return;
+
+ // End-of-assignment sentinel
+ c = malloc(sizeof(*c) + 1);
+ c->assigned = 1 << (64 - prefix->length);
+ c->length = 64;
+ c->name[0] = 0;
+ list_add(&c->head, &prefix->assignments);
+
+ // Excluded prefix
+ if (prefix->excl_length > 0) {
+ const char name[] = "!excluded";
+ c = malloc(sizeof(*c) + sizeof(name));
+ c->assigned = ntohl(prefix->excl_addr.s6_addr32[1]) &
+ ((1 << (64 - prefix->length)) - 1);
+ c->length = prefix->excl_length;
+ memcpy(c->name, name, sizeof(name));
+ list_add(&c->head, &prefix->assignments);
+ }
+
+ struct list_head assign_later = LIST_HEAD_INIT(assign_later);
+ vlist_for_each_element(&interfaces, iface, node) {
+ if (iface->config_ip.assignment_length < 48 ||
+ iface->config_ip.assignment_length > 64)
+ continue;
+
+ size_t namelen = strlen(iface->name) + 1;
+ c = malloc(sizeof(*c) + namelen);
+ c->length = iface->config_ip.assignment_length;
+ c->assigned = iface->config_ip.assignment_hint;
+ c->enabled = false;
+ memcpy(c->name, iface->name, namelen);
+
+ // First process all custom assignments, put all others in later-list
+ if (c->assigned == -1 || !interface_prefix_assign(&prefix->assignments, c)) {
+ if (c->assigned != -1) {
+ c->assigned = -1;
+ netifd_log_message(L_WARNING, "Failed to assign requested subprefix "
+ "of size %hhu for %s, trying other\n", c->length, c->name);
+ }
+ list_add_tail(&c->head, &assign_later);
+ }
+ }
+
+ // Then try to assign all other + failed custom assignments
+ while (!list_empty(&assign_later)) {
+ c = list_first_entry(&assign_later, struct device_prefix_assignment, head);
+ list_del(&c->head);
+ if (!interface_prefix_assign(&prefix->assignments, c)) {
+ netifd_log_message(L_WARNING, "Failed to assign subprefix "
+ "of size %hhu for %s\n", c->length, c->name);
+ free(c);
+ }
+ }
+
+ list_for_each_entry(c, &prefix->assignments, head)
+ if ((iface = vlist_find(&interfaces, c->name, iface, node)))
+ interface_set_prefix_address(c, prefix, iface, true);
+}
+
+
+void interface_refresh_assignments(bool hint)
+{
+ static bool refresh = false;
+ if (!hint && refresh) {
+ struct device_prefix *p;
+ list_for_each_entry(p, &prefixes, head)
+ interface_update_prefix_assignments(p, true);
+ }
+ refresh = hint;
+}
+
+
+static void
+interface_update_prefix(struct vlist_tree *tree,
+ struct vlist_node *node_new,
+ struct vlist_node *node_old)
+{
+ struct device_prefix *prefix_old, *prefix_new;
+ prefix_old = container_of(node_old, struct device_prefix, node);
+ prefix_new = container_of(node_new, struct device_prefix, node);
+
+ struct device_route route;
+ memset(&route, 0, sizeof(route));
+ route.flags = DEVADDR_INET6;
+ route.metric = INT32_MAX;
+ route.mask = (node_new) ? prefix_new->length : prefix_old->length;
+ route.addr.in6 = (node_new) ? prefix_new->addr : prefix_old->addr;
+
+ struct device_prefix_assignment *c;
+ struct interface *iface;
+
+ if (node_old && node_new) {
+ // Move assignments and refresh addresses to update valid times
+ list_splice(&prefix_old->assignments, &prefix_new->assignments);
+
+ list_for_each_entry(c, &prefix_new->assignments, head)
+ if ((iface = vlist_find(&interfaces, c->name, iface, node)))
+ interface_set_prefix_address(c, prefix_new, iface, true);
+ } else if (node_new) {
+ // Set null-route to avoid routing loops
+ system_add_route(NULL, &route);
+
+ interface_update_prefix_assignments(prefix_new, true);
+ } else if (node_old) {
+ interface_update_prefix_assignments(prefix_old, false);
+
+ // Remove null-route
+ system_del_route(NULL, &route);
+ }
+
+ if (node_old) {
+ list_del(&prefix_old->head);
+ free(prefix_old);
+ }
+
+ if (node_new)
+ list_add(&prefix_new->head, &prefixes);
+
+}
+
+struct device_prefix*
+interface_ip_add_device_prefix(struct interface *iface, struct in6_addr *addr,
+ uint8_t length, time_t valid_until, time_t preferred_until,
+ struct in6_addr *excl_addr, uint8_t excl_length)
+{
+ struct device_prefix *prefix = calloc(1, sizeof(*prefix));
+ prefix->length = length;
+ prefix->addr = *addr;
+ prefix->preferred_until = preferred_until;
+ prefix->valid_until = valid_until;
+ prefix->iface = iface;
+ INIT_LIST_HEAD(&prefix->assignments);
+
+ if (excl_addr) {
+ prefix->excl_addr = *excl_addr;
+ prefix->excl_length = excl_length;
+ }
+
+ if (iface)
+ vlist_add(&iface->proto_ip.prefix, &prefix->node, &prefix->addr);
+ else
+ interface_update_prefix(NULL, &prefix->node, NULL);
+
+ return prefix;
+}
+
+void
+interface_ip_set_ula_prefix(const char *prefix)
+{
+ char buf[INET6_ADDRSTRLEN + 4] = {0}, *saveptr;
+ if (prefix)
+ strncpy(buf, prefix, sizeof(buf) - 1);
+ char *prefixaddr = strtok_r(buf, "/", &saveptr);
+
+ struct in6_addr addr;
+ if (!prefixaddr || inet_pton(AF_INET6, prefixaddr, &addr) < 1) {
+ if (ula_prefix) {
+ interface_update_prefix(NULL, NULL, &ula_prefix->node);
+ ula_prefix = NULL;
+ }
+ return;
+ }
+
+ int length;
+ char *prefixlen = strtok_r(NULL, ",", &saveptr);
+ if (!prefixlen || (length = atoi(prefixlen)) < 1 || length > 64)
+ return;
+
+ if (!ula_prefix || !IN6_ARE_ADDR_EQUAL(&addr, &ula_prefix->addr) ||
+ ula_prefix->length != length) {
+ if (ula_prefix)
+ interface_update_prefix(NULL, NULL, &ula_prefix->node);
+
+ ula_prefix = interface_ip_add_device_prefix(NULL, &addr, length,
+ 0, 0, NULL, 0);
+ }
+}
+
void
interface_add_dns_server(struct interface_ip_settings *ip, const char *str)
{
struct dns_server *s;
s = calloc(1, sizeof(*s));
+ if (!s)
+ return;
+
s->af = AF_INET;
if (inet_pton(s->af, str, &s->addr.in))
goto add;
struct dns_server *s;
struct dns_search_domain *d;
const char *str;
- char buf[32];
+ char buf[INET6_ADDRSTRLEN];
vlist_simple_for_each_element(&ip->dns_servers, s, node) {
str = inet_ntop(s->af, &s->addr, buf, sizeof(buf));
struct interface *iface;
char *path = alloca(strlen(resolv_conf) + 5);
FILE *f;
+ uint32_t crcold, crcnew;
sprintf(path, "%s.tmp", resolv_conf);
unlink(path);
- f = fopen(path, "w");
+ f = fopen(path, "w+");
if (!f) {
D(INTERFACE, "Failed to open %s for writing\n", path);
return;
if (!iface->proto_ip.no_dns)
write_resolv_conf_entries(f, &iface->proto_ip);
}
+ fflush(f);
+ rewind(f);
+ crcnew = crc32_file(f);
fclose(f);
- if (rename(path, resolv_conf) < 0) {
+
+ crcold = crcnew + 1;
+ f = fopen(resolv_conf, "r");
+ if (f) {
+ crcold = crc32_file(f);
+ fclose(f);
+ }
+
+ if (crcold == crcnew) {
+ unlink(path);
+ } else if (rename(path, resolv_conf) < 0) {
D(INTERFACE, "Failed to replace %s\n", resolv_conf);
unlink(path);
}
system_del_route(dev, route);
route->enabled = _enabled;
}
+
+ struct device_prefix *c;
+ struct device_prefix_assignment *a;
+ list_for_each_entry(c, &prefixes, head)
+ list_for_each_entry(a, &c->assignments, head)
+ if (!strcmp(a->name, ip->iface->name))
+ interface_set_prefix_address(a, c, ip->iface, enabled);
}
void
}
vlist_update(&ip->route);
vlist_update(&ip->addr);
+ vlist_update(&ip->prefix);
}
void
vlist_simple_flush(&ip->dns_search);
vlist_flush(&ip->route);
vlist_flush(&ip->addr);
+ vlist_flush(&ip->prefix);
+ interface_write_resolv_conf();
}
void
vlist_simple_flush_all(&ip->dns_search);
vlist_flush_all(&ip->route);
vlist_flush_all(&ip->addr);
+ vlist_flush_all(&ip->prefix);
}
static void
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);
+ vlist_init(&ip->prefix, prefix_cmp, interface_update_prefix);
}
void
__interface_ip_init(&iface->proto_ip, iface);
__interface_ip_init(&iface->config_ip, iface);
vlist_init(&iface->host_routes, route_cmp, interface_update_host_route);
+
+}
+
+static void
+interface_ip_valid_until_handler(struct uloop_timeout *t)
+{
+ time_t now = system_get_rtime();
+ struct interface *iface;
+ vlist_for_each_element(&interfaces, iface, node) {
+ if (iface->state != IFS_UP)
+ continue;
+
+ struct device_addr *addr, *addrp;
+ struct device_route *route, *routep;
+ struct device_prefix *pref, *prefp;
+
+ vlist_for_each_element_safe(&iface->proto_ip.addr, addr, node, addrp)
+ if (addr->valid_until && addr->valid_until < now)
+ vlist_delete(&iface->proto_ip.addr, &addr->node);
+
+ vlist_for_each_element_safe(&iface->proto_ip.route, route, node, routep)
+ if (route->valid_until && route->valid_until < now)
+ vlist_delete(&iface->proto_ip.route, &route->node);
+
+ vlist_for_each_element_safe(&iface->proto_ip.prefix, pref, node, prefp)
+ if (pref->valid_until && pref->valid_until < now)
+ vlist_delete(&iface->proto_ip.prefix, &pref->node);
+
+ }
+
+ uloop_timeout_set(t, 1000);
+}
+
+static void __init
+interface_ip_init_worker(void)
+{
+ valid_until_timeout.cb = interface_ip_valid_until_handler;
+ uloop_timeout_set(&valid_until_timeout, 1000);
}
projects / project / netifd.git / blobdiff