ubus: fix invalid ipv6-prefix json
[project/odhcpd.git] / src / ubus.c
index e2c310f..973ae5a 100644 (file)
@@ -1,55 +1,67 @@
 #include <syslog.h>
 #include <libubus.h>
 #include <libubox/uloop.h>
+#include <netinet/in.h>
 #include <arpa/inet.h>
 
 #include "odhcpd.h"
 #include "dhcpv6.h"
 #include "dhcpv4.h"
 
-
 static struct ubus_context *ubus = NULL;
 static struct ubus_subscriber netifd;
 static struct blob_buf b;
 static struct blob_attr *dump = NULL;
 static uint32_t objid = 0;
-
+static struct ubus_request req_dump = { .list = LIST_HEAD_INIT(req_dump.list) };
 
 static int handle_dhcpv4_leases(struct ubus_context *ctx, _unused struct ubus_object *obj,
                struct ubus_request_data *req, _unused const char *method,
                _unused struct blob_attr *msg)
 {
-       blob_buf_init(&b, 0);
-       void *a = blobmsg_open_table(&b, "device");
+       struct interface *iface;
        time_t now = odhcpd_time();
+       void *a;
+
+       blob_buf_init(&b, 0);
+       a = blobmsg_open_table(&b, "device");
 
-       struct interface *iface;
        list_for_each_entry(iface, &interfaces, head) {
-               if (iface->dhcpv4 != RELAYD_SERVER)
+               if (iface->dhcpv4 != MODE_SERVER || iface->dhcpv4_assignments.next == NULL)
                        continue;
 
                void *i = blobmsg_open_table(&b, iface->ifname);
                void *j = blobmsg_open_array(&b, "leases");
 
-               struct dhcpv4_assignment *lease;
-               list_for_each_entry(lease, &iface->dhcpv4_assignments, head) {
-                       if (lease->valid_until < now)
+               struct dhcpv4_assignment *c;
+               list_for_each_entry(c, &iface->dhcpv4_assignments, head) {
+                       if (!INFINITE_VALID(c->valid_until) && c->valid_until < now)
                                continue;
 
-                       void *l = blobmsg_open_table(&b, NULL);
-
+                       void *m, *l = blobmsg_open_table(&b, NULL);
                        char *buf = blobmsg_alloc_string_buffer(&b, "mac", 13);
-                       odhcpd_hexlify(buf, lease->hwaddr, sizeof(lease->hwaddr));
+
+                       odhcpd_hexlify(buf, c->hwaddr, sizeof(c->hwaddr));
                        blobmsg_add_string_buffer(&b);
 
-                       blobmsg_add_string(&b, "hostname", lease->hostname);
+                       blobmsg_add_string(&b, "hostname", (c->hostname) ? c->hostname : "");
+                       blobmsg_add_u8(&b, "accept-reconf-nonce", c->accept_fr_nonce);
+
+                       m = blobmsg_open_array(&b, "flags");
+                       if (c->flags & OAF_BOUND)
+                               blobmsg_add_string(&b, NULL, "bound");
+
+                       if (c->flags & OAF_STATIC)
+                               blobmsg_add_string(&b, NULL, "static");
+                       blobmsg_close_array(&b, m);
 
-                       buf = blobmsg_alloc_string_buffer(&b, "ip", INET_ADDRSTRLEN);
-                       struct in_addr addr = {htonl(lease->addr)};
+                       buf = blobmsg_alloc_string_buffer(&b, "address", INET_ADDRSTRLEN);
+                       struct in_addr addr = {.s_addr = c->addr};
                        inet_ntop(AF_INET, &addr, buf, INET_ADDRSTRLEN);
                        blobmsg_add_string_buffer(&b);
 
-                       blobmsg_add_u32(&b, "valid", now - lease->valid_until);
+                       blobmsg_add_u32(&b, "valid", INFINITE_VALID(c->valid_until) ?
+                                               (uint32_t)-1 : (uint32_t)(c->valid_until - now));
 
                        blobmsg_close_table(&b, l);
                }
@@ -60,61 +72,80 @@ static int handle_dhcpv4_leases(struct ubus_context *ctx, _unused struct ubus_ob
 
        blobmsg_close_table(&b, a);
        ubus_send_reply(ctx, req, b.head);
+
        return 0;
 }
 
+static void dhcpv6_blobmsg_ia_addr(struct in6_addr *addr, int prefix, uint32_t pref,
+                                       uint32_t valid, _unused void *arg)
+{
+       void *a = blobmsg_open_table(&b, NULL);
+       char *buf = blobmsg_alloc_string_buffer(&b, "address", INET6_ADDRSTRLEN);
+
+       inet_ntop(AF_INET6, addr, buf, INET6_ADDRSTRLEN);
+       blobmsg_add_string_buffer(&b);
+       blobmsg_add_u32(&b, "preferred-lifetime",
+                       pref == UINT32_MAX ? (uint32_t)-1 : pref);
+       blobmsg_add_u32(&b, "valid-lifetime",
+                       valid == UINT32_MAX ? (uint32_t)-1 : valid);
+
+       if (prefix != 128)
+               blobmsg_add_u32(&b, "prefix-length", prefix);
+
+       blobmsg_close_table(&b, a);
+}
 
 static int handle_dhcpv6_leases(_unused struct ubus_context *ctx, _unused struct ubus_object *obj,
                _unused struct ubus_request_data *req, _unused const char *method,
                _unused struct blob_attr *msg)
 {
-       blob_buf_init(&b, 0);
-       void *a = blobmsg_open_table(&b, "device");
+       struct interface *iface;
        time_t now = odhcpd_time();
+       void *a;
+
+       blob_buf_init(&b, 0);
+       a = blobmsg_open_table(&b, "device");
 
-       struct interface *iface;
        list_for_each_entry(iface, &interfaces, head) {
-               if (iface->dhcpv6 != RELAYD_SERVER)
+               if (iface->dhcpv6 != MODE_SERVER || iface->ia_assignments.next == NULL)
                        continue;
 
                void *i = blobmsg_open_table(&b, iface->ifname);
                void *j = blobmsg_open_array(&b, "leases");
 
-               struct dhcpv6_assignment *lease;
-               list_for_each_entry(lease, &iface->ia_assignments, head) {
-                       if (lease->valid_until < now)
-                               continue;
+               struct dhcpv6_assignment *a, *border = list_last_entry(
+                               &iface->ia_assignments, struct dhcpv6_assignment, head);
 
-                       void *l = blobmsg_open_table(&b, NULL);
+               list_for_each_entry(a, &iface->ia_assignments, head) {
+                       if (a == border || (!INFINITE_VALID(a->valid_until) &&
+                                               a->valid_until < now))
+                               continue;
 
+                       void *m, *l = blobmsg_open_table(&b, NULL);
                        char *buf = blobmsg_alloc_string_buffer(&b, "duid", 264);
-                       odhcpd_hexlify(buf, lease->clid_data, lease->clid_len);
+
+                       odhcpd_hexlify(buf, a->clid_data, a->clid_len);
                        blobmsg_add_string_buffer(&b);
 
-                       blobmsg_add_u32(&b, "iaid", ntohl(lease->iaid));
-                       blobmsg_add_string(&b, "hostname", (lease->hostname) ? lease->hostname : "");
-                       blobmsg_add_u32(&b, "assigned", lease->assigned);
-                       blobmsg_add_u32(&b, "length", lease->length);
-
-                       void *m = blobmsg_open_array(&b, "ipv6");
-                       struct in6_addr addr;
-                       for (size_t i = 0; i < iface->ia_addr_len; ++i) {
-                               if (iface->ia_addr[i].prefix > 64)
-                                       continue;
-
-                               addr = iface->ia_addr[i].addr;
-                               if (lease->length == 128)
-                                       addr.s6_addr32[3] = htonl(lease->assigned);
-                               else
-                                       addr.s6_addr32[1] |= htonl(lease->assigned);
-
-                               char *c = blobmsg_alloc_string_buffer(&b, NULL, INET6_ADDRSTRLEN);
-                               inet_ntop(AF_INET6, &addr, c, INET6_ADDRSTRLEN);
-                               blobmsg_add_string_buffer(&b);
-                       }
+                       blobmsg_add_u32(&b, "iaid", ntohl(a->iaid));
+                       blobmsg_add_string(&b, "hostname", (a->hostname) ? a->hostname : "");
+                       blobmsg_add_u8(&b, "accept-reconf", a->accept_reconf);
+                       blobmsg_add_u32(&b, "assigned", a->assigned);
+
+                       m = blobmsg_open_array(&b, "flags");
+                       if (a->flags & OAF_BOUND)
+                               blobmsg_add_string(&b, NULL, "bound");
+
+                       if (a->flags & OAF_STATIC)
+                               blobmsg_add_string(&b, NULL, "static");
+                       blobmsg_close_array(&b, m);
+
+                       m = blobmsg_open_array(&b, a->length == 128 ? "ipv6-addr": "ipv6-prefix");
+                       dhcpv6_enum_ia_addrs(iface, a, now, dhcpv6_blobmsg_ia_addr, NULL);
                        blobmsg_close_table(&b, m);
 
-                       blobmsg_add_u32(&b, "valid", now - lease->valid_until);
+                       blobmsg_add_u32(&b, "valid", INFINITE_VALID(a->valid_until) ?
+                                               (uint32_t)-1 : (uint32_t)(a->valid_until - now));
 
                        blobmsg_close_table(&b, l);
                }
@@ -176,7 +207,7 @@ static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
 
 static void handle_dump(_unused struct ubus_request *req, _unused int type, struct blob_attr *msg)
 {
-       struct blob_attr *tb[DUMP_ATTR_INTERFACE];
+       struct blob_attr *tb[DUMP_ATTR_MAX];
        blobmsg_parse(dump_attrs, DUMP_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 
        if (!tb[DUMP_ATTR_INTERFACE])
@@ -188,6 +219,19 @@ static void handle_dump(_unused struct ubus_request *req, _unused int type, stru
 }
 
 
+static void update_netifd(bool subscribe)
+{
+       if (subscribe)
+               ubus_subscribe(ubus, &netifd, objid);
+
+       ubus_abort_request(ubus, &req_dump);
+       if (!ubus_invoke_async(ubus, objid, "dump", NULL, &req_dump)) {
+               req_dump.data_cb = handle_dump;
+               ubus_complete_request_async(ubus, &req_dump);
+       }
+}
+
+
 static int handle_update(_unused struct ubus_context *ctx, _unused struct ubus_object *obj,
                _unused struct ubus_request_data *req, _unused const char *method,
                struct blob_attr *msg)
@@ -208,18 +252,11 @@ static int handle_update(_unused struct ubus_context *ctx, _unused struct ubus_o
        if (iface && iface->ignore)
                return 0;
 
-       ubus_invoke(ubus, objid, "dump", NULL, handle_dump, NULL, 0);
+       update_netifd(false);
        return 0;
 }
 
 
-static void subscribe_netifd(void)
-{
-       ubus_subscribe(ubus, &netifd, objid);
-       ubus_invoke(ubus, objid, "dump", NULL, handle_dump, NULL, 0);
-}
-
-
 void ubus_apply_network(void)
 {
        struct blob_attr *a;
@@ -274,6 +311,25 @@ static const struct blobmsg_policy obj_attrs[OBJ_ATTR_MAX] = {
        [OBJ_ATTR_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING },
 };
 
+void ubus_bcast_dhcp_event(const char *type, const uint8_t *mac,
+               const size_t mlen, const struct in_addr *addr, const char *name,
+               const char *interface)
+{
+       if (!ubus || !main_object.has_subscribers)
+               return;
+
+       blob_buf_init(&b, 0);
+       if (mac)
+               blobmsg_add_string(&b, "mac", odhcpd_print_mac(mac, mlen));
+       if (addr)
+               blobmsg_add_string(&b, "ip", inet_ntoa(*addr));
+       if (name)
+               blobmsg_add_string(&b, "name", name);
+       if (interface)
+               blobmsg_add_string(&b, "interface", interface);
+
+       ubus_notify(ubus, &main_object, type, b.head, -1);
+}
 
 static void handle_event(_unused struct ubus_context *ctx, _unused struct ubus_event_handler *ev,
                 _unused const char *type, struct blob_attr *msg)
@@ -288,7 +344,7 @@ static void handle_event(_unused struct ubus_context *ctx, _unused struct ubus_e
                return;
 
        objid = blobmsg_get_u32(tb[OBJ_ATTR_ID]);
-       subscribe_netifd();
+       update_netifd(true);
 }
 
 static struct ubus_event_handler event_handler = { .cb = handle_event };
@@ -338,7 +394,7 @@ bool ubus_has_prefix(const char *name, const char *ifname)
                        continue;
 
                if ((cur = tb[IFACE_ATTR_PREFIX])) {
-                       if (blobmsg_type(cur) != BLOBMSG_TYPE_ARRAY || !blobmsg_check_attr(cur, NULL))
+                       if (blobmsg_type(cur) != BLOBMSG_TYPE_ARRAY || !blobmsg_check_attr(cur, false))
                                continue;
 
                        struct blob_attr *d;
@@ -353,72 +409,10 @@ bool ubus_has_prefix(const char *name, const char *ifname)
 }
 
 
-enum {
-       ADDR_ATTR_ADDR,
-       ADDR_ATTR_CLASS,
-       ADDR_ATTR_MAX
-};
-
-static const struct blobmsg_policy addr_attrs[ADDR_ATTR_MAX] = {
-       [ADDR_ATTR_ADDR] = { .name = "address", .type = BLOBMSG_TYPE_STRING },
-       [ADDR_ATTR_CLASS] = { .name = "class", .type = BLOBMSG_TYPE_STRING },
-};
-
-bool ubus_get_class(const char *ifname, const struct in6_addr *addr, uint16_t *pclass)
-{
-       struct blob_attr *c, *cur;
-       unsigned rem;
-
-       if (!dump)
-               return false;
-
-       blobmsg_for_each_attr(c, dump, rem) {
-               struct blob_attr *tb[IFACE_ATTR_MAX];
-               blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, blobmsg_data(c), blobmsg_data_len(c));
-
-               if (!tb[IFACE_ATTR_IFNAME])
-                       continue;
-
-               if (strcmp(ifname, blobmsg_get_string(tb[IFACE_ATTR_IFNAME])))
-                       continue;
-
-               if ((cur = tb[IFACE_ATTR_ADDRESS])) {
-                       if (blobmsg_type(cur) != BLOBMSG_TYPE_ARRAY || !blobmsg_check_attr(cur, NULL))
-                               continue;
-
-                       struct blob_attr *d;
-                       unsigned drem;
-                       blobmsg_for_each_attr(d, cur, drem) {
-                               struct blob_attr *t[ADDR_ATTR_MAX];
-                               blobmsg_parse(addr_attrs, ADDR_ATTR_MAX, t, blobmsg_data(d), blobmsg_data_len(d));
-
-                               if (!t[ADDR_ATTR_ADDR] || !t[ADDR_ATTR_CLASS])
-                                       continue;
-
-                               const char *addrs = blobmsg_get_string(t[ADDR_ATTR_ADDR]);
-                               const char *class = blobmsg_get_string(t[ADDR_ATTR_CLASS]);
-
-                               struct in6_addr ip6addr;
-                               inet_pton(AF_INET6, addrs, &ip6addr);
-
-                               if (IN6_ARE_ADDR_EQUAL(&ip6addr, addr)) {
-                                       *pclass = atoi(class);
-                                       return true;
-                               }
-                       }
-               }
-
-               return false;
-       }
-
-       return false;
-}
-
-
-int init_ubus(void)
+int ubus_init(void)
 {
        if (!(ubus = ubus_connect(NULL))) {
-               syslog(LOG_ERR, "Unable to connect to ubus: %s", strerror(errno));
+               syslog(LOG_ERR, "Unable to connect to ubus: %m");
                return -1;
        }
 
@@ -429,7 +423,7 @@ int init_ubus(void)
        ubus_add_object(ubus, &main_object);
        ubus_register_event_handler(ubus, &event_handler, "ubus.object.add");
        if (!ubus_lookup_id(ubus, "network.interface", &objid))
-               subscribe_netifd();
+               update_netifd(true);
 
        return 0;
 }