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#include <syslog.h>
#include <libubus.h>
#include <libubox/uloop.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 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");
time_t now = odhcpd_time();
struct interface *iface;
list_for_each_entry(iface, &interfaces, head) {
if (iface->dhcpv4 != RELAYD_SERVER)
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)
continue;
void *l = blobmsg_open_table(&b, NULL);
char *buf = blobmsg_alloc_string_buffer(&b, "mac", 13);
odhcpd_hexlify(buf, lease->hwaddr, sizeof(lease->hwaddr));
blobmsg_add_string_buffer(&b);
blobmsg_add_string(&b, "hostname", lease->hostname);
buf = blobmsg_alloc_string_buffer(&b, "ip", INET_ADDRSTRLEN);
struct in_addr addr = {htonl(lease->addr)};
inet_ntop(AF_INET, &addr, buf, INET_ADDRSTRLEN);
blobmsg_add_string_buffer(&b);
blobmsg_add_u32(&b, "valid", now - lease->valid_until);
blobmsg_close_table(&b, l);
}
blobmsg_close_array(&b, j);
blobmsg_close_table(&b, i);
}
blobmsg_close_table(&b, a);
ubus_send_reply(ctx, req, b.head);
return 0;
}
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");
time_t now = odhcpd_time();
struct interface *iface;
list_for_each_entry(iface, &interfaces, head) {
if (iface->dhcpv6 != RELAYD_SERVER)
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;
void *l = blobmsg_open_table(&b, NULL);
char *buf = blobmsg_alloc_string_buffer(&b, "duid", 264);
odhcpd_hexlify(buf, lease->clid_data, lease->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_close_table(&b, m);
blobmsg_add_u32(&b, "valid", now - lease->valid_until);
blobmsg_close_table(&b, l);
}
blobmsg_close_array(&b, j);
blobmsg_close_table(&b, i);
}
blobmsg_close_table(&b, a);
ubus_send_reply(ctx, req, b.head);
return 0;
}
static struct ubus_method main_object_methods[] = {
{.name = "ipv4leases", .handler = handle_dhcpv4_leases},
{.name = "ipv6leases", .handler = handle_dhcpv6_leases},
};
static struct ubus_object_type main_object_type =
UBUS_OBJECT_TYPE("dhcp", main_object_methods);
static struct ubus_object main_object = {
.name = "dhcp",
.type = &main_object_type,
.methods = main_object_methods,
.n_methods = ARRAY_SIZE(main_object_methods),
};
enum {
DUMP_ATTR_INTERFACE,
DUMP_ATTR_MAX
};
static const struct blobmsg_policy dump_attrs[DUMP_ATTR_MAX] = {
[DUMP_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_ARRAY },
};
enum {
IFACE_ATTR_INTERFACE,
IFACE_ATTR_IFNAME,
IFACE_ATTR_UP,
IFACE_ATTR_DATA,
IFACE_ATTR_PREFIX,
IFACE_ATTR_MAX,
};
static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
[IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
[IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
[IFACE_ATTR_UP] = { .name = "up", .type = BLOBMSG_TYPE_BOOL },
[IFACE_ATTR_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
[IFACE_ATTR_PREFIX] = { .name = "ipv6-prefix", .type = BLOBMSG_TYPE_ARRAY },
};
static void handle_dump(_unused struct ubus_request *req, _unused int type, struct blob_attr *msg)
{
struct blob_attr *tb[DUMP_ATTR_INTERFACE];
blobmsg_parse(dump_attrs, DUMP_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
if (!tb[DUMP_ATTR_INTERFACE])
return;
free(dump);
dump = blob_memdup(tb[DUMP_ATTR_INTERFACE]);
raise(SIGHUP);
}
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)
{
struct blob_attr *tb[IFACE_ATTR_MAX];
blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
const char *interface = (tb[IFACE_ATTR_INTERFACE]) ?
blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]) : "";
const char *ifname = (tb[IFACE_ATTR_IFNAME]) ?
blobmsg_get_string(tb[IFACE_ATTR_IFNAME]) : "";
struct interface *c, *iface = NULL;
list_for_each_entry(c, &interfaces, head)
if (!strcmp(interface, c->name) || !strcmp(ifname, c->ifname))
iface = c;
if (iface && iface->ignore)
return 0;
ubus_invoke(ubus, objid, "dump", NULL, handle_dump, NULL, 0);
return 0;
}
static void subscribe_netifd(void)
{
netifd.cb = handle_update;
ubus_subscribe(ubus, &netifd, objid);
ubus_invoke(ubus, objid, "dump", NULL, handle_dump, NULL, 0);
}
void ubus_apply_network(void)
{
struct blob_attr *c;
unsigned rem;
if (!dump)
return;
blobmsg_for_each_attr(c, dump, rem) {
struct blob_attr *tb[IFACE_ATTR_MAX];
blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, blob_data(c), blob_len(c));
if (!tb[IFACE_ATTR_INTERFACE] || !tb[IFACE_ATTR_DATA])
continue;
const char *interface = (tb[IFACE_ATTR_INTERFACE]) ?
blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]) : "";
const char *ifname = (tb[IFACE_ATTR_IFNAME]) ?
blobmsg_get_string(tb[IFACE_ATTR_IFNAME]) : "";
struct interface *c;
list_for_each_entry(c, &interfaces, head) {
char *f = memmem(c->upstream, c->upstream_len,
interface, strlen(interface) + 1);
if (strcmp(interface, c->name) && strcmp(ifname, c->ifname) &&
(!f || (f != c->upstream && f[-1] != 0)))
continue;
if (!c || !c->ignore)
config_parse_interface(tb[IFACE_ATTR_DATA], interface, false);
}
}
}
enum {
OBJ_ATTR_ID,
OBJ_ATTR_PATH,
OBJ_ATTR_MAX
};
static const struct blobmsg_policy obj_attrs[OBJ_ATTR_MAX] = {
[OBJ_ATTR_ID] = { .name = "id", .type = BLOBMSG_TYPE_INT32 },
[OBJ_ATTR_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING },
};
static void handle_event(_unused struct ubus_context *ctx, _unused struct ubus_event_handler *ev,
_unused const char *type, struct blob_attr *msg)
{
struct blob_attr *tb[OBJ_ATTR_MAX];
blobmsg_parse(obj_attrs, OBJ_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
objid = 0;
if (!tb[OBJ_ATTR_ID] || !tb[OBJ_ATTR_PATH])
return;
if (strcmp(blobmsg_get_string(tb[OBJ_ATTR_PATH]), "network.interface"))
return;
objid = blobmsg_get_u32(tb[OBJ_ATTR_ID]);
subscribe_netifd();
}
static struct ubus_event_handler event_handler = { .cb = handle_event };
const char* ubus_get_ifname(const char *name)
{
struct blob_attr *c;
unsigned rem;
if (!dump)
return NULL;
blobmsg_for_each_attr(c, dump, rem) {
struct blob_attr *tb[IFACE_ATTR_MAX];
blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, blob_data(c), blob_len(c));
if (!tb[IFACE_ATTR_INTERFACE] || strcmp(name,
blobmsg_get_string(tb[IFACE_ATTR_INTERFACE])))
continue;
if (tb[IFACE_ATTR_IFNAME])
return blobmsg_get_string(tb[IFACE_ATTR_IFNAME]);
}
return NULL;
}
bool ubus_has_prefix(const char *name, const char *ifname)
{
struct blob_attr *c, *cur;
unsigned rem;
if (!dump)
return NULL;
blobmsg_for_each_attr(c, dump, rem) {
struct blob_attr *tb[IFACE_ATTR_MAX];
blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, blob_data(c), blob_len(c));
if (!tb[IFACE_ATTR_INTERFACE] || !tb[IFACE_ATTR_IFNAME])
continue;
if (!strcmp(name, blobmsg_get_string(tb[IFACE_ATTR_INTERFACE])) ||
!strcmp(ifname, blobmsg_get_string(tb[IFACE_ATTR_IFNAME])))
continue;
if ((cur = tb[IFACE_ATTR_PREFIX])) {
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) {
return true;
}
}
}
return false;
}
int init_ubus(void)
{
if (!(ubus = ubus_connect(NULL))) {
syslog(LOG_ERR, "Unable to connect to ubus: %s", strerror(errno));
return -1;
}
ubus_add_uloop(ubus);
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();
return 0;
}
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