+/*
+ * Copyright (C) 2011 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1
+ * 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.
+ */
+
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/socket.h>
+#include <fcntl.h>
#include <unistd.h>
+#include <poll.h>
#include <libubox/blob.h>
#include <libubox/blobmsg.h>
#include "libubus.h"
#include "ubusmsg.h"
-#define DEBUG 1
-
-#ifdef DEBUG
-#define DPRINTF(_format, ...) fprintf(stderr, "ubus: " _format, ## __VA_ARGS__)
-#else
-#define DPRINTF(...) do {} while(0)
-#endif
-
#define STATIC_IOV(_var) { .iov_base = (char *) &(_var), .iov_len = sizeof(_var) }
const char *__ubus_strerror[__UBUS_STATUS_LAST] = {
[UBUS_STATUS_METHOD_NOT_FOUND] = "Method not found",
[UBUS_STATUS_NOT_FOUND] = "Not found",
[UBUS_STATUS_NO_DATA] = "No response",
+ [UBUS_STATUS_PERMISSION_DENIED] = "Permission denied",
+ [UBUS_STATUS_TIMEOUT] = "Request timed out",
+ [UBUS_STATUS_NOT_SUPPORTED] = "Operation not supported",
+ [UBUS_STATUS_UNKNOWN_ERROR] = "Unknown error",
};
static struct blob_buf b;
[UBUS_ATTR_STATUS] = { .type = BLOB_ATTR_INT32 },
[UBUS_ATTR_OBJID] = { .type = BLOB_ATTR_INT32 },
[UBUS_ATTR_OBJPATH] = { .type = BLOB_ATTR_STRING },
+ [UBUS_ATTR_METHOD] = { .type = BLOB_ATTR_STRING },
};
static struct blob_attr *attrbuf[UBUS_ATTR_MAX];
struct blob_attr data[];
};
+struct ubus_pending_invoke {
+ struct list_head list;
+ struct ubus_msghdr hdr;
+};
+
+static void ubus_process_pending_invoke(struct ubus_context *ctx);
+
static int ubus_cmp_id(const void *k1, const void *k2, void *ptr)
{
const uint32_t *id1 = k1, *id2 = k2;
return *id1 > *id2;
}
-struct blob_attr **ubus_parse_msg(struct blob_attr *msg)
+static struct blob_attr **ubus_parse_msg(struct blob_attr *msg)
{
blob_parse(msg, attrbuf, ubus_policy, UBUS_ATTR_MAX);
return attrbuf;
return err;
}
+static void wait_data(int fd, bool write)
+{
+ struct pollfd pfd = { .fd = fd };
+
+ pfd.events = write ? POLLOUT : POLLIN;
+ poll(&pfd, 1, 0);
+}
+
+static int writev_retry(int fd, struct iovec *iov, int iov_len)
+{
+ int len = 0;
+
+ do {
+ int cur_len = writev(fd, iov, iov_len);
+ if (cur_len < 0) {
+ switch(errno) {
+ case EAGAIN:
+ wait_data(fd, true);
+ break;
+ case EINTR:
+ break;
+ default:
+ return -1;
+ }
+ continue;
+ }
+ len += cur_len;
+ while (cur_len >= iov->iov_len) {
+ cur_len -= iov->iov_len;
+ iov_len--;
+ iov++;
+ if (!cur_len || !iov_len)
+ return len;
+ }
+ iov->iov_len -= cur_len;
+ } while (1);
+}
+
static int ubus_send_msg(struct ubus_context *ctx, uint32_t seq,
struct blob_attr *msg, int cmd, uint32_t peer)
{
iov[1].iov_base = (char *) msg;
iov[1].iov_len = blob_raw_len(msg);
- return writev(ctx->sock.fd, iov, 2);
+ return writev_retry(ctx->sock.fd, iov, ARRAY_SIZE(iov));
}
-int ubus_start_request(struct ubus_context *ctx, struct ubus_request *req,
- struct blob_attr *msg, int cmd, uint32_t peer)
+static int ubus_start_request(struct ubus_context *ctx, struct ubus_request *req,
+ struct blob_attr *msg, int cmd, uint32_t peer)
{
memset(req, 0, sizeof(*req));
+ if (msg && blob_pad_len(msg) > UBUS_MAX_MSGLEN)
+ return -1;
+
INIT_LIST_HEAD(&req->list);
INIT_LIST_HEAD(&req->pending);
req->ctx = ctx;
int bytes;
while (iov->iov_len > 0) {
+ if (wait)
+ wait_data(fd, false);
+
bytes = read(fd, iov->iov_base, iov->iov_len);
if (bytes < 0) {
bytes = 0;
+ if (uloop_cancelled)
+ return false;
if (errno == EINTR)
continue;
- if (errno != EAGAIN) {
- perror("read");
+ if (errno != EAGAIN)
return false;
- }
}
if (!wait && !bytes)
return false;
if (blob_raw_len(hdr->data) < sizeof(*hdr->data))
return false;
- if (blob_raw_len(hdr->data) + sizeof(*hdr) > UBUS_MAX_MSGLEN)
+ if (blob_pad_len(hdr->data) > UBUS_MAX_MSGLEN)
return false;
return true;
}
-static bool get_next_msg(struct ubus_context *ctx, bool wait)
+static bool get_next_msg(struct ubus_context *ctx)
{
struct iovec iov = STATIC_IOV(ctx->msgbuf.hdr);
/* receive header + start attribute */
iov.iov_len += sizeof(struct blob_attr);
- if (!recv_retry(ctx->sock.fd, &iov, wait))
+ if (!recv_retry(ctx->sock.fd, &iov, false))
return false;
iov.iov_len = blob_len(ctx->msgbuf.hdr.data);
if (!attrbuf[UBUS_ATTR_STATUS])
return false;
- *ret = blob_get_int32(attrbuf[UBUS_ATTR_STATUS]);
+ *ret = blob_get_u32(attrbuf[UBUS_ATTR_STATUS]);
return true;
}
+static void req_data_cb(struct ubus_request *req, int type, struct blob_attr *data)
+{
+ struct blob_attr **attr;
+
+ if (req->raw_data_cb)
+ req->raw_data_cb(req, type, data);
+
+ if (!req->data_cb)
+ return;
+
+ attr = ubus_parse_msg(data);
+ req->data_cb(req, type, attr[UBUS_ATTR_DATA]);
+}
+
static void ubus_process_req_data(struct ubus_request *req)
{
struct ubus_pending_data *data;
struct ubus_pending_data, list);
list_del(&data->list);
if (!req->cancelled)
- req->data_cb(req, data->type, data->data);
+ req_data_cb(req, data->type, data->data);
free(data);
}
}
int ret = UBUS_STATUS_INVALID_ARGUMENT;
if (!list_empty(&req->list))
- list_del(&req->list);
+ list_del_init(&req->list);
ubus_get_status(hdr, &ret);
req->peer = hdr->peer;
if (!req->blocked) {
req->blocked = true;
- req->data_cb(req, hdr->type, hdr->data);
+ req_data_cb(req, hdr->type, hdr->data);
ubus_process_req_data(req);
req->blocked = false;
int method;
int ret = 0;
+ req.peer = hdr->peer;
+ req.seq = hdr->seq;
ubus_parse_msg(hdr->data);
- if (!attrbuf[UBUS_ATTR_METHOD] || !attrbuf[UBUS_ATTR_OBJID]) {
+ if (!attrbuf[UBUS_ATTR_OBJID])
+ return;
+
+ objid = blob_get_u32(attrbuf[UBUS_ATTR_OBJID]);
+
+ if (!attrbuf[UBUS_ATTR_METHOD]) {
ret = UBUS_STATUS_INVALID_ARGUMENT;
goto send;
}
- objid = blob_get_int32(attrbuf[UBUS_ATTR_OBJID]);
obj = avl_find_element(&ctx->objects, &objid, obj, avl);
if (!obj) {
ret = UBUS_STATUS_NOT_FOUND;
}
for (method = 0; method < obj->n_methods; method++)
- if (!strcmp(obj->methods[method].name,
+ if (!obj->methods[method].name ||
+ !strcmp(obj->methods[method].name,
blob_data(attrbuf[UBUS_ATTR_METHOD])))
goto found;
found:
req.object = objid;
- req.peer = hdr->peer;
- req.seq = hdr->seq;
- ret = obj->methods[method].handler(obj, &req, obj->methods[method].name,
+ ret = obj->methods[method].handler(ctx, obj, &req,
+ blob_data(attrbuf[UBUS_ATTR_METHOD]),
attrbuf[UBUS_ATTR_DATA]);
send:
blob_buf_init(&b, 0);
blob_put_int32(&b, UBUS_ATTR_STATUS, ret);
blob_put_int32(&b, UBUS_ATTR_OBJID, objid);
- ubus_send_msg(ctx, hdr->seq, b.head, UBUS_MSG_STATUS, hdr->peer);
+ ubus_send_msg(ctx, req.seq, b.head, UBUS_MSG_STATUS, req.peer);
}
static void ubus_process_msg(struct ubus_context *ctx, struct ubus_msghdr *hdr)
{
+ struct ubus_pending_invoke *pending;
struct ubus_request *req;
switch(hdr->type) {
case UBUS_MSG_DATA:
req = ubus_find_request(ctx, hdr->seq, hdr->peer);
- if (req && req->data_cb)
+ if (req && (req->data_cb || req->raw_data_cb))
ubus_req_data(req, hdr);
break;
case UBUS_MSG_INVOKE:
- ubus_process_invoke(ctx, hdr);
- break;
- default:
- DPRINTF("unknown message type: %d\n", hdr->type);
+ if (ctx->stack_depth > 2) {
+ pending = calloc(1, sizeof(*pending) +
+ blob_raw_len(hdr->data));
+
+ if (!pending)
+ return;
+
+ memcpy(&pending->hdr, hdr, sizeof(*hdr) +
+ blob_raw_len(hdr->data));
+ list_add(&pending->list, &ctx->pending);
+ } else {
+ ubus_process_invoke(ctx, hdr);
+ }
break;
}
}
+static void ubus_process_pending_invoke(struct ubus_context *ctx)
+{
+ struct ubus_pending_invoke *pending, *tmp;
+
+ list_for_each_entry_safe(pending, tmp, &ctx->pending, list) {
+ list_del(&pending->list);
+ ubus_process_msg(ctx, &pending->hdr);
+ free(pending);
+ if (ctx->stack_depth > 2)
+ break;
+ }
+}
+
void ubus_abort_request(struct ubus_context *ctx, struct ubus_request *req)
{
if (!list_empty(&req->list))
req->cancelled = true;
ubus_process_req_data(req);
- list_del(&req->list);
+ list_del_init(&req->list);
}
void ubus_complete_request_async(struct ubus_context *ctx, struct ubus_request *req)
struct ubus_context *ctx = container_of(u, struct ubus_context, sock);
struct ubus_msghdr *hdr = &ctx->msgbuf.hdr;
- while (get_next_msg(ctx, false))
+ while (get_next_msg(ctx)) {
ubus_process_msg(ctx, hdr);
+ if (uloop_cancelled)
+ break;
+ }
+
+ if (u->eof)
+ ctx->connection_lost(ctx);
}
-int ubus_complete_request(struct ubus_context *ctx, struct ubus_request *req)
+static void ubus_sync_req_cb(struct ubus_request *req, int ret)
{
- struct ubus_msghdr *hdr = &ctx->msgbuf.hdr;
+ req->status_msg = true;
+ req->status_code = ret;
+ uloop_end();
+}
- if (!list_empty(&req->list))
- list_del(&req->list);
+struct ubus_sync_req_cb {
+ struct uloop_timeout timeout;
+ struct ubus_request *req;
+};
- while (1) {
- if (req->status_msg)
- return req->status_code;
+static void ubus_sync_req_timeout_cb(struct uloop_timeout *timeout)
+{
+ struct ubus_sync_req_cb *cb;
- if (req->cancelled)
- return UBUS_STATUS_NO_DATA;
+ cb = container_of(timeout, struct ubus_sync_req_cb, timeout);
+ ubus_sync_req_cb(cb->req, UBUS_STATUS_TIMEOUT);
+}
- if (!get_next_msg(ctx, true))
- return UBUS_STATUS_NO_DATA;
+int ubus_complete_request(struct ubus_context *ctx, struct ubus_request *req,
+ int timeout)
+{
+ struct ubus_sync_req_cb cb;
+ ubus_complete_handler_t complete_cb = req->complete_cb;
+ bool registered = ctx->sock.registered;
+ int status = UBUS_STATUS_NO_DATA;
+
+ if (!registered) {
+ uloop_init();
+ ubus_add_uloop(ctx);
+ }
- if (hdr->seq != req->seq || hdr->peer != req->peer)
- goto skip;
+ if (timeout) {
+ memset(&cb, 0, sizeof(cb));
+ cb.req = req;
+ cb.timeout.cb = ubus_sync_req_timeout_cb;
+ uloop_timeout_set(&cb.timeout, timeout);
+ }
- switch(hdr->type) {
- case UBUS_MSG_STATUS:
- return ubus_process_req_status(req, hdr);
- case UBUS_MSG_DATA:
- if (req->data_cb)
- ubus_req_data(req, hdr);
- continue;
- default:
- goto skip;
- }
+ ubus_complete_request_async(ctx, req);
+ req->complete_cb = ubus_sync_req_cb;
-skip:
- ubus_process_msg(ctx, hdr);
+ ctx->stack_depth++;
+ while (!req->status_msg) {
+ bool cancelled = uloop_cancelled;
+ uloop_cancelled = false;
+ uloop_run();
+ uloop_cancelled = cancelled;
}
+ ctx->stack_depth--;
+
+ if (timeout)
+ uloop_timeout_cancel(&cb.timeout);
+
+ if (req->status_msg)
+ status = req->status_code;
+
+ req->complete_cb = complete_cb;
+ if (req->complete_cb)
+ req->complete_cb(req, status);
+
+ if (!registered)
+ uloop_fd_delete(&ctx->sock);
+
+ if (!ctx->stack_depth)
+ ubus_process_pending_invoke(ctx);
+
+ return status;
+}
+
+struct ubus_lookup_request {
+ struct ubus_request req;
+ ubus_lookup_handler_t cb;
+};
+
+static void ubus_lookup_cb(struct ubus_request *ureq, int type, struct blob_attr *msg)
+{
+ struct ubus_lookup_request *req;
+ struct ubus_object_data obj;
+ struct blob_attr **attr;
+
+ req = container_of(ureq, struct ubus_lookup_request, req);
+ attr = ubus_parse_msg(msg);
+
+ if (!attr[UBUS_ATTR_OBJID] || !attr[UBUS_ATTR_OBJPATH] ||
+ !attr[UBUS_ATTR_OBJTYPE])
+ return;
+
+ memset(&obj, 0, sizeof(obj));
+ obj.id = blob_get_u32(attr[UBUS_ATTR_OBJID]);
+ obj.path = blob_data(attr[UBUS_ATTR_OBJPATH]);
+ obj.type_id = blob_get_u32(attr[UBUS_ATTR_OBJTYPE]);
+ obj.signature = attr[UBUS_ATTR_SIGNATURE];
+ req->cb(ureq->ctx, &obj, ureq->priv);
+}
+
+int ubus_lookup(struct ubus_context *ctx, const char *path,
+ ubus_lookup_handler_t cb, void *priv)
+{
+ struct ubus_lookup_request lookup;
+
+ blob_buf_init(&b, 0);
+ if (path)
+ blob_put_string(&b, UBUS_ATTR_OBJPATH, path);
+
+ if (ubus_start_request(ctx, &lookup.req, b.head, UBUS_MSG_LOOKUP, 0) < 0)
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
+ lookup.req.raw_data_cb = ubus_lookup_cb;
+ lookup.req.priv = priv;
+ lookup.cb = cb;
+ return ubus_complete_request(ctx, &lookup.req, 0);
+}
+
+static void ubus_lookup_id_cb(struct ubus_request *req, int type, struct blob_attr *msg)
+{
+ struct blob_attr **attr;
+ uint32_t *id = req->priv;
+
+ attr = ubus_parse_msg(msg);
+
+ if (!attr[UBUS_ATTR_OBJID])
+ return;
+
+ *id = blob_get_u32(attr[UBUS_ATTR_OBJID]);
+}
+
+int ubus_lookup_id(struct ubus_context *ctx, const char *path, uint32_t *id)
+{
+ struct ubus_request req;
+
+ blob_buf_init(&b, 0);
+ if (path)
+ blob_put_string(&b, UBUS_ATTR_OBJPATH, path);
+
+ if (ubus_start_request(ctx, &req, b.head, UBUS_MSG_LOOKUP, 0) < 0)
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
+ req.raw_data_cb = ubus_lookup_id_cb;
+ req.priv = id;
+
+ return ubus_complete_request(ctx, &req, 0);
}
-void ubus_invoke_async(struct ubus_context *ctx, uint32_t obj, const char *method,
+int ubus_send_reply(struct ubus_context *ctx, struct ubus_request_data *req,
+ struct blob_attr *msg)
+{
+ int ret;
+
+ blob_buf_init(&b, 0);
+ blob_put_int32(&b, UBUS_ATTR_OBJID, req->object);
+ blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
+ ret = ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_DATA, req->peer);
+ if (ret < 0)
+ return UBUS_STATUS_NO_DATA;
+
+ return 0;
+}
+
+int ubus_invoke_async(struct ubus_context *ctx, uint32_t obj, const char *method,
struct blob_attr *msg, struct ubus_request *req)
{
blob_buf_init(&b, 0);
blob_put_int32(&b, UBUS_ATTR_OBJID, obj);
blob_put_string(&b, UBUS_ATTR_METHOD, method);
- blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
+ if (msg)
+ blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
- ubus_start_request(ctx, req, b.head, UBUS_MSG_INVOKE, obj);
+ if (ubus_start_request(ctx, req, b.head, UBUS_MSG_INVOKE, obj) < 0)
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
+ return 0;
}
int ubus_invoke(struct ubus_context *ctx, uint32_t obj, const char *method,
- struct blob_attr *msg, ubus_data_handler_t cb, void *priv)
+ struct blob_attr *msg, ubus_data_handler_t cb, void *priv,
+ int timeout)
{
struct ubus_request req;
ubus_invoke_async(ctx, obj, method, msg, &req);
req.data_cb = cb;
req.priv = priv;
- return ubus_complete_request(ctx, &req);
+ return ubus_complete_request(ctx, &req, timeout);
}
-static void ubus_publish_cb(struct ubus_request *req, int type, struct blob_attr *msg)
+static void ubus_add_object_cb(struct ubus_request *req, int type, struct blob_attr *msg)
{
struct ubus_object *obj = req->priv;
if (!attrbuf[UBUS_ATTR_OBJID])
return;
- obj->id = blob_get_int32(attrbuf[UBUS_ATTR_OBJID]);
+ obj->id = blob_get_u32(attrbuf[UBUS_ATTR_OBJID]);
if (attrbuf[UBUS_ATTR_OBJTYPE])
- obj->type->id = blob_get_int32(attrbuf[UBUS_ATTR_OBJTYPE]);
+ obj->type->id = blob_get_u32(attrbuf[UBUS_ATTR_OBJTYPE]);
obj->avl.key = &obj->id;
avl_insert(&req->ctx->objects, &obj->avl);
}
-static bool ubus_push_table_data(const struct ubus_signature **sig, int *rem, bool array)
+static void ubus_push_method_data(const struct ubus_method *m)
{
- const struct ubus_signature *cur;
- bool nest_type;
- void *nest;
+ void *mtbl;
+ int i;
- while (rem) {
- cur = (*sig)++;
- (*rem)--;
- switch(cur->type) {
- case UBUS_SIGNATURE_END:
- return !array;
- case BLOBMSG_TYPE_INT32:
- case BLOBMSG_TYPE_STRING:
- blobmsg_add_u32(&b, cur->name, cur->type);
- break;
- case BLOBMSG_TYPE_TABLE:
- case BLOBMSG_TYPE_ARRAY:
- nest_type = cur->type == BLOBMSG_TYPE_ARRAY;
- nest = blobmsg_open_nested(&b, cur->name, nest_type);
- if (!ubus_push_table_data(sig, rem, nest_type))
- return false;
- blobmsg_close_table(&b, nest);
- break;
- default:
- return false;
- }
- if (array)
- return true;
- }
- return false;
+ mtbl = blobmsg_open_table(&b, m->name);
+
+ for (i = 0; i < m->n_policy; i++)
+ blobmsg_add_u32(&b, m->policy[i].name, m->policy[i].type);
+
+ blobmsg_close_table(&b, mtbl);
}
-static bool ubus_push_object_type(struct ubus_object_type *type)
+static bool ubus_push_object_type(const struct ubus_object_type *type)
{
- void *s, *m;
- int rem = type->n_signature;
- const struct ubus_signature *sig = type->signature;
+ void *s;
+ int i;
s = blob_nest_start(&b, UBUS_ATTR_SIGNATURE);
- while (rem) {
- if (sig->type != UBUS_SIGNATURE_METHOD)
- return false;
-
- m = blobmsg_open_table(&b, sig->name);
- sig++;
- rem--;
- if (!ubus_push_table_data(&sig, &rem, false))
- return false;
+ for (i = 0; i < type->n_methods; i++)
+ ubus_push_method_data(&type->methods[i]);
- blobmsg_close_table(&b, m);
- }
blob_nest_end(&b, s);
return true;
}
-int ubus_publish(struct ubus_context *ctx, struct ubus_object *obj)
+int ubus_add_object(struct ubus_context *ctx, struct ubus_object *obj)
{
struct ubus_request req;
int ret;
- if (obj->id || !obj->name || !obj->type)
+ blob_buf_init(&b, 0);
+
+ if (obj->name && obj->type) {
+ blob_put_string(&b, UBUS_ATTR_OBJPATH, obj->name);
+
+ if (obj->type->id)
+ blob_put_int32(&b, UBUS_ATTR_OBJTYPE, obj->type->id);
+ else if (!ubus_push_object_type(obj->type))
+ return UBUS_STATUS_INVALID_ARGUMENT;
+ }
+
+ if (ubus_start_request(ctx, &req, b.head, UBUS_MSG_ADD_OBJECT, 0) < 0)
return UBUS_STATUS_INVALID_ARGUMENT;
+ req.raw_data_cb = ubus_add_object_cb;
+ req.priv = obj;
+ ret = ubus_complete_request(ctx, &req, 0);
+ if (ret)
+ return ret;
+
+ if (!obj->id)
+ return UBUS_STATUS_NO_DATA;
+
+ return 0;
+}
+
+static void ubus_remove_object_cb(struct ubus_request *req, int type, struct blob_attr *msg)
+{
+ struct ubus_object *obj = req->priv;
+
+ ubus_parse_msg(msg);
+
+ if (!attrbuf[UBUS_ATTR_OBJID])
+ return;
+
+ obj->id = 0;
+
+ if (attrbuf[UBUS_ATTR_OBJTYPE] && obj->type)
+ obj->type->id = 0;
+
+ avl_delete(&req->ctx->objects, &obj->avl);
+}
+
+int ubus_remove_object(struct ubus_context *ctx, struct ubus_object *obj)
+{
+ struct ubus_request req;
+ int ret;
+
blob_buf_init(&b, 0);
- blob_put_string(&b, UBUS_ATTR_OBJPATH, obj->name);
+ blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id);
- if (obj->type->id)
- blob_put_int32(&b, UBUS_ATTR_OBJTYPE, obj->type->id);
- else if (!ubus_push_object_type(obj->type))
+ if (ubus_start_request(ctx, &req, b.head, UBUS_MSG_REMOVE_OBJECT, 0) < 0)
return UBUS_STATUS_INVALID_ARGUMENT;
- ubus_start_request(ctx, &req, b.head, UBUS_MSG_PUBLISH, 0);
- req.data_cb = ubus_publish_cb;
+ req.raw_data_cb = ubus_remove_object_cb;
req.priv = obj;
- ret = ubus_complete_request(ctx, &req);
+ ret = ubus_complete_request(ctx, &req, 0);
if (ret)
return ret;
- if (!obj->id)
+ if (obj->id)
return UBUS_STATUS_NO_DATA;
return 0;
}
+static int ubus_event_cb(struct ubus_context *ctx, struct ubus_object *obj,
+ struct ubus_request_data *req,
+ const char *method, struct blob_attr *msg)
+{
+ struct ubus_event_handler *ev;
+
+ ev = container_of(obj, struct ubus_event_handler, obj);
+ ev->cb(ctx, ev, method, msg);
+ return 0;
+}
+
+static const struct ubus_method event_method = {
+ .name = NULL,
+ .handler = ubus_event_cb,
+};
+
+int ubus_register_event_handler(struct ubus_context *ctx,
+ struct ubus_event_handler *ev,
+ const char *pattern)
+{
+ struct ubus_object *obj = &ev->obj;
+ struct blob_buf b2;
+ int ret;
+
+ if (!obj->id) {
+ obj->methods = &event_method;
+ obj->n_methods = 1;
+
+ if (!!obj->name ^ !!obj->type)
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
+ ret = ubus_add_object(ctx, obj);
+ if (ret)
+ return ret;
+ }
+
+ /* use a second buffer, ubus_invoke() overwrites the primary one */
+ memset(&b2, 0, sizeof(b2));
+ blob_buf_init(&b2, 0);
+ blobmsg_add_u32(&b2, "object", obj->id);
+ if (pattern)
+ blobmsg_add_string(&b2, "pattern", pattern);
+
+ return ubus_invoke(ctx, UBUS_SYSTEM_OBJECT_EVENT, "register", b2.head,
+ NULL, NULL, 0);
+}
+
+enum {
+ WATCH_ID,
+ WATCH_NOTIFY,
+ __WATCH_MAX
+};
+
+static const struct blobmsg_policy watch_policy[] = {
+ [WATCH_ID] = { .name = "id", .type = BLOBMSG_TYPE_INT32 },
+ [WATCH_NOTIFY] = { .name = "notify", .type = BLOBMSG_TYPE_STRING },
+};
+
+
+static int ubus_watch_cb(struct ubus_context *ctx, struct ubus_object *obj,
+ struct ubus_request_data *req,
+ const char *method, struct blob_attr *msg)
+{
+ struct ubus_watch_object *w;
+ struct blob_attr *tb[__WATCH_MAX];
+
+ blobmsg_parse(watch_policy, ARRAY_SIZE(watch_policy), tb, blob_data(msg), blob_len(msg));
+
+ if (!tb[WATCH_ID] || !tb[WATCH_NOTIFY])
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
+ if (req->peer)
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
+ w = container_of(obj, struct ubus_watch_object, obj);
+ w->cb(ctx, w, blobmsg_get_u32(tb[WATCH_ID]));
+ return 0;
+}
+
+static const struct ubus_method watch_method = {
+ .name = NULL,
+ .handler = ubus_watch_cb,
+};
+
+int ubus_register_watch_object(struct ubus_context *ctx, struct ubus_watch_object *w_obj)
+{
+ struct ubus_object *obj = &w_obj->obj;
+
+ obj->methods = &watch_method;
+ obj->n_methods = 1;
+
+ return ubus_add_object(ctx, obj);
+}
+
+static int
+__ubus_watch_request(struct ubus_context *ctx, struct ubus_object *obj, uint32_t id, const char *method, int type)
+{
+ struct ubus_request req;
+
+ blob_buf_init(&b, 0);
+ blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id);
+ blob_put_int32(&b, UBUS_ATTR_TARGET, id);
+ if (method)
+ blob_put_string(&b, UBUS_ATTR_METHOD, method);
+
+ if (ubus_start_request(ctx, &req, b.head, type, 0) < 0)
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
+ return ubus_complete_request(ctx, &req, 0);
+
+}
+
+int ubus_watch_object_add(struct ubus_context *ctx, struct ubus_watch_object *obj, uint32_t id)
+{
+ return __ubus_watch_request(ctx, &obj->obj, id, "event", UBUS_MSG_ADD_WATCH);
+}
+
+int ubus_watch_object_remove(struct ubus_context *ctx, struct ubus_watch_object *obj, uint32_t id)
+{
+ return __ubus_watch_request(ctx, &obj->obj, id, NULL, UBUS_MSG_REMOVE_WATCH);
+}
+
+int ubus_send_event(struct ubus_context *ctx, const char *id,
+ struct blob_attr *data)
+{
+ struct ubus_request req;
+ void *s;
+
+ blob_buf_init(&b, 0);
+ blob_put_int32(&b, UBUS_ATTR_OBJID, UBUS_SYSTEM_OBJECT_EVENT);
+ blob_put_string(&b, UBUS_ATTR_METHOD, "send");
+ s = blob_nest_start(&b, UBUS_ATTR_DATA);
+ blobmsg_add_string(&b, "id", id);
+ blobmsg_add_field(&b, BLOBMSG_TYPE_TABLE, "data", blob_data(data), blob_len(data));
+ blob_nest_end(&b, s);
+
+ if (ubus_start_request(ctx, &req, b.head, UBUS_MSG_INVOKE, UBUS_SYSTEM_OBJECT_EVENT) < 0)
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
+ return ubus_complete_request(ctx, &req, 0);
+}
+
+static void ubus_default_connection_lost(struct ubus_context *ctx)
+{
+ if (ctx->sock.registered)
+ uloop_end();
+}
+
struct ubus_context *ubus_connect(const char *path)
{
struct ubus_context *ctx;
goto error;
ctx->sock.fd = usock(USOCK_UNIX, path, NULL);
- if (ctx->sock.fd < 0) {
- DPRINTF("Failed to connect to server\n");
+ if (ctx->sock.fd < 0)
goto error_free;
- }
+
ctx->sock.cb = ubus_handle_data;
- if (read(ctx->sock.fd, &hdr, sizeof(hdr)) != sizeof(hdr)) {
- DPRINTF("Failed to read initial message data\n");
+ if (read(ctx->sock.fd, &hdr, sizeof(hdr)) != sizeof(hdr))
goto error_close;
- }
- if (!ubus_validate_hdr(&hdr.hdr)) {
- DPRINTF("Failed to validate initial message header\n");
+ if (!ubus_validate_hdr(&hdr.hdr))
goto error_close;
- }
- if (hdr.hdr.type != UBUS_MSG_HELLO) {
- DPRINTF("Unexpected initial message\n");
+ if (hdr.hdr.type != UBUS_MSG_HELLO)
goto error_close;
- }
buf = calloc(1, blob_raw_len(&hdr.data));
if (!buf)
goto error_close;
memcpy(buf, &hdr.data, sizeof(hdr.data));
- if (read(ctx->sock.fd, blob_data(buf), blob_len(buf)) != blob_len(buf)) {
- DPRINTF("Failed to retrieve initial message data\n");
+ if (read(ctx->sock.fd, blob_data(buf), blob_len(buf)) != blob_len(buf))
goto error_free_buf;
- }
ctx->local_id = hdr.hdr.peer;
free(buf);
+ ctx->connection_lost = ubus_default_connection_lost;
+
INIT_LIST_HEAD(&ctx->requests);
+ INIT_LIST_HEAD(&ctx->pending);
avl_init(&ctx->objects, ubus_cmp_id, false, NULL);
- if (!ctx->local_id) {
- DPRINTF("Failed to get local peer id\n");
+ if (!ctx->local_id)
goto error_close;
- }
+
+ fcntl(ctx->sock.fd, F_SETFL, fcntl(ctx->sock.fd, F_GETFL) | O_NONBLOCK);
return ctx;
projects / project / ubus.git / blobdiff