+/*
+ * uhttpd - Tiny single-threaded httpd - ubus handler
+ *
+ * Copyright (C) 2012 Jo-Philipp Wich <xm@subsignal.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "uhttpd.h"
+#include "uhttpd-utils.h"
+#include "uhttpd-ubus.h"
+
+
+enum {
+ UH_UBUS_SN_TIMEOUT,
+ __UH_UBUS_SN_MAX,
+};
+
+static const struct blobmsg_policy new_policy[__UH_UBUS_SN_MAX] = {
+ [UH_UBUS_SN_TIMEOUT] = { .name = "timeout", .type = BLOBMSG_TYPE_INT32 },
+};
+
+
+enum {
+ UH_UBUS_SI_SID,
+ __UH_UBUS_SI_MAX,
+};
+
+static const struct blobmsg_policy sid_policy[__UH_UBUS_SI_MAX] = {
+ [UH_UBUS_SI_SID] = { .name = "sid", .type = BLOBMSG_TYPE_STRING },
+};
+
+
+enum {
+ UH_UBUS_SS_SID,
+ UH_UBUS_SS_VALUES,
+ __UH_UBUS_SS_MAX,
+};
+
+static const struct blobmsg_policy set_policy[__UH_UBUS_SS_MAX] = {
+ [UH_UBUS_SS_SID] = { .name = "sid", .type = BLOBMSG_TYPE_STRING },
+ [UH_UBUS_SS_VALUES] = { .name = "values", .type = BLOBMSG_TYPE_TABLE },
+};
+
+
+enum {
+ UH_UBUS_SG_SID,
+ UH_UBUS_SG_KEYS,
+ __UH_UBUS_SG_MAX,
+};
+
+static const struct blobmsg_policy get_policy[__UH_UBUS_SG_MAX] = {
+ [UH_UBUS_SG_SID] = { .name = "sid", .type = BLOBMSG_TYPE_STRING },
+ [UH_UBUS_SG_KEYS] = { .name = "keys", .type = BLOBMSG_TYPE_ARRAY },
+};
+
+
+enum {
+ UH_UBUS_SA_SID,
+ UH_UBUS_SA_OBJECTS,
+ __UH_UBUS_SA_MAX,
+};
+
+static const struct blobmsg_policy acl_policy[__UH_UBUS_SA_MAX] = {
+ [UH_UBUS_SA_SID] = { .name = "sid", .type = BLOBMSG_TYPE_STRING },
+ [UH_UBUS_SA_OBJECTS] = { .name = "objects", .type = BLOBMSG_TYPE_ARRAY },
+};
+
+
+static bool
+uh_ubus_strmatch(const char *str, const char *pat)
+{
+ while (*pat)
+ {
+ if (*pat == '?')
+ {
+ if (!*str)
+ return false;
+
+ str++;
+ pat++;
+ }
+ else if (*pat == '*')
+ {
+ if (uh_ubus_strmatch(str, pat+1))
+ return true;
+
+ if (*str && uh_ubus_strmatch(str+1, pat))
+ return true;
+
+ return false;
+ }
+ else if (*str++ != *pat++)
+ {
+ return false;
+ }
+ }
+
+ return (!*str && !*pat);
+}
+
+static int
+uh_ubus_avlcmp(const void *k1, const void *k2, void *ptr)
+{
+ return strcmp((char *)k1, (char *)k2);
+}
+
+static void
+uh_ubus_random(char *dest)
+{
+ int i;
+ unsigned char buf[16] = { 0 };
+ FILE *f;
+
+ if ((f = fopen("/dev/urandom", "r")) != NULL)
+ {
+ fread(buf, 1, sizeof(buf), f);
+ fclose(f);
+ }
+
+ for (i = 0; i < sizeof(buf); i++)
+ sprintf(dest + (i<<1), "%02x", buf[i]);
+}
+
+static void
+uh_ubus_session_dump_data(struct uh_ubus_session *ses, struct blob_buf *b)
+{
+ struct uh_ubus_session_data *d;
+
+ avl_for_each_element(&ses->data, d, avl)
+ {
+ blobmsg_add_field(b, blobmsg_type(d->attr), blobmsg_name(d->attr),
+ blobmsg_data(d->attr), blobmsg_data_len(d->attr));
+ }
+}
+
+static void
+uh_ubus_session_dump_acls(struct uh_ubus_session *ses, struct blob_buf *b)
+{
+ struct uh_ubus_session_acl *acl;
+ const char *lastobj = NULL;
+ void *c = NULL;
+
+ avl_for_each_element(&ses->acls, acl, avl)
+ {
+ if (!lastobj || strcmp(acl->object, lastobj))
+ {
+ if (c) blobmsg_close_array(b, c);
+ c = blobmsg_open_array(b, acl->object);
+ }
+
+ blobmsg_add_string(b, NULL, acl->function);
+ lastobj = acl->object;
+ }
+
+ if (c) blobmsg_close_array(b, c);
+}
+
+static void
+uh_ubus_session_dump(struct uh_ubus_session *ses,
+ struct ubus_context *ctx,
+ struct ubus_request_data *req)
+{
+ void *c;
+ struct blob_buf b;
+
+ memset(&b, 0, sizeof(b));
+ blob_buf_init(&b, 0);
+
+ blobmsg_add_string(&b, "sid", ses->id);
+ blobmsg_add_u32(&b, "timeout", ses->timeout);
+ blobmsg_add_u32(&b, "touched", ses->touched.tv_sec);
+
+ c = blobmsg_open_table(&b, "acls");
+ uh_ubus_session_dump_acls(ses, &b);
+ blobmsg_close_table(&b, c);
+
+ c = blobmsg_open_table(&b, "data");
+ uh_ubus_session_dump_data(ses, &b);
+ blobmsg_close_table(&b, c);
+
+ ubus_send_reply(ctx, req, b.head);
+ blob_buf_free(&b);
+}
+
+static struct uh_ubus_session *
+uh_ubus_session_create(struct uh_ubus_state *state, int timeout)
+{
+ struct uh_ubus_session *ses;
+
+ ses = malloc(sizeof(*ses));
+
+ /* failed to allocate memory... */
+ if (!ses)
+ return NULL;
+
+ memset(ses, 0, sizeof(*ses));
+
+ uh_ubus_random(ses->id);
+
+ ses->timeout = timeout;
+ ses->avl.key = ses->id;
+
+ avl_insert(&state->sessions, &ses->avl);
+ avl_init(&ses->acls, uh_ubus_avlcmp, true, NULL);
+ avl_init(&ses->data, uh_ubus_avlcmp, false, NULL);
+ clock_gettime(CLOCK_MONOTONIC, &ses->touched);
+
+ return ses;
+}
+
+
+static struct uh_ubus_session *
+uh_ubus_session_get(struct uh_ubus_state *state, const char *id)
+{
+ struct uh_ubus_session *ses;
+
+ ses = avl_find_element(&state->sessions, id, ses, avl);
+
+ if (ses)
+ clock_gettime(CLOCK_MONOTONIC, &ses->touched);
+
+ return ses;
+}
+
+static void
+uh_ubus_session_destroy(struct uh_ubus_state *state,
+ struct uh_ubus_session *ses)
+{
+ struct uh_ubus_session_acl *acl, *nacl;
+ struct uh_ubus_session_data *data, *ndata;
+
+ avl_remove_all_elements(&ses->acls, acl, avl, nacl)
+ free(acl);
+
+ avl_remove_all_elements(&ses->data, data, avl, ndata)
+ free(data);
+
+ avl_delete(&state->sessions, &ses->avl);
+ free(ses);
+}
+
+static void
+uh_ubus_session_cleanup(struct uh_ubus_state *state)
+{
+ struct timespec now;
+ struct uh_ubus_session *ses, *nses;
+
+ clock_gettime(CLOCK_MONOTONIC, &now);
+
+ avl_for_each_element_safe(&state->sessions, ses, avl, nses)
+ {
+ if ((now.tv_sec - ses->touched.tv_sec) >= ses->timeout)
+ uh_ubus_session_destroy(state, ses);
+ }
+}
+
+
+static int
+uh_ubus_handle_create(struct ubus_context *ctx, struct ubus_object *obj,
+ struct ubus_request_data *req, const char *method,
+ struct blob_attr *msg)
+{
+ struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus);
+ struct uh_ubus_session *ses;
+ struct blob_attr *tb[__UH_UBUS_SN_MAX];
+
+ int timeout = state->timeout;
+
+ blobmsg_parse(new_policy, __UH_UBUS_SN_MAX, tb, blob_data(msg), blob_len(msg));
+
+ /* TODO: make this a uloop timeout */
+ uh_ubus_session_cleanup(state);
+
+ if (tb[UH_UBUS_SN_TIMEOUT])
+ timeout = *(uint32_t *)blobmsg_data(tb[UH_UBUS_SN_TIMEOUT]);
+
+ ses = uh_ubus_session_create(state, timeout);
+
+ if (ses)
+ uh_ubus_session_dump(ses, ctx, req);
+
+ return 0;
+}
+
+static int
+uh_ubus_handle_list(struct ubus_context *ctx, struct ubus_object *obj,
+ struct ubus_request_data *req, const char *method,
+ struct blob_attr *msg)
+{
+ struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus);
+ struct uh_ubus_session *ses;
+ struct blob_attr *tb[__UH_UBUS_SI_MAX];
+
+ blobmsg_parse(sid_policy, __UH_UBUS_SI_MAX, tb, blob_data(msg), blob_len(msg));
+
+ /* TODO: make this a uloop timeout */
+ uh_ubus_session_cleanup(state);
+
+ if (!tb[UH_UBUS_SI_SID])
+ {
+ avl_for_each_element(&state->sessions, ses, avl)
+ uh_ubus_session_dump(ses, ctx, req);
+ }
+ else
+ {
+ ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SI_SID]));
+
+ if (!ses)
+ return UBUS_STATUS_NOT_FOUND;
+
+ uh_ubus_session_dump(ses, ctx, req);
+ }
+
+ return 0;
+}
+
+
+static int
+uh_ubus_session_grant(struct uh_ubus_session *ses, struct ubus_context *ctx,
+ const char *object, const char *function)
+{
+ struct uh_ubus_session_acl *acl, *nacl;
+
+ acl = avl_find_element(&ses->acls, object, acl, avl);
+
+ if (acl)
+ {
+ avl_for_element_to_last(&ses->acls, acl, acl, avl)
+ {
+ if (!strcmp(acl->function, function))
+ return 1;
+ }
+ }
+
+ nacl = malloc(sizeof(*nacl) + strlen(object) + strlen(function) + 2);
+
+ if (nacl)
+ {
+ memset(nacl, 0, sizeof(*nacl));
+ nacl->function = nacl->object + 1;
+ nacl->function += sprintf(nacl->object, "%s", object);
+ sprintf(nacl->function, "%s", function);
+
+ nacl->avl.key = nacl->object;
+ avl_insert(&ses->acls, &nacl->avl);
+ }
+
+ return 0;
+}
+
+static int
+uh_ubus_session_revoke(struct uh_ubus_session *ses, struct ubus_context *ctx,
+ const char *object, const char *function)
+{
+ struct uh_ubus_session_acl *acl, *nacl;
+
+ if (!object && !function)
+ {
+ avl_remove_all_elements(&ses->acls, acl, avl, nacl)
+ free(acl);
+ }
+ else
+ {
+ avl_for_each_element_safe(&ses->acls, acl, avl, nacl)
+ {
+ if (uh_ubus_strmatch(acl->object, object) &&
+ uh_ubus_strmatch(acl->function, function))
+ {
+ avl_delete(&ses->acls, &acl->avl);
+ free(acl);
+ }
+ }
+ }
+
+ return 0;
+}
+
+
+static int
+uh_ubus_handle_grant(struct ubus_context *ctx, struct ubus_object *obj,
+ struct ubus_request_data *req, const char *method,
+ struct blob_attr *msg)
+{
+ struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus);
+ struct uh_ubus_session *ses;
+ struct blob_attr *tb[__UH_UBUS_SA_MAX];
+ struct blob_attr *attr, *sattr;
+ const char *object, *function;
+ int rem1, rem2;
+
+ blobmsg_parse(acl_policy, __UH_UBUS_SA_MAX, tb, blob_data(msg), blob_len(msg));
+
+ if (!tb[UH_UBUS_SA_SID] || !tb[UH_UBUS_SA_OBJECTS])
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
+ ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SA_SID]));
+
+ if (!ses)
+ return UBUS_STATUS_NOT_FOUND;
+
+ blobmsg_for_each_attr(attr, tb[UH_UBUS_SA_OBJECTS], rem1)
+ {
+ if (blob_id(attr) != BLOBMSG_TYPE_ARRAY)
+ continue;
+
+ object = NULL;
+ function = NULL;
+
+ blobmsg_for_each_attr(sattr, attr, rem2)
+ {
+ if (blob_id(sattr) != BLOBMSG_TYPE_STRING)
+ continue;
+
+ if (!object)
+ object = blobmsg_data(sattr);
+ else if (!function)
+ function = blobmsg_data(sattr);
+ else
+ break;
+ }
+
+ if (object && function)
+ uh_ubus_session_grant(ses, ctx, object, function);
+ }
+
+ return 0;
+}
+
+static int
+uh_ubus_handle_revoke(struct ubus_context *ctx, struct ubus_object *obj,
+ struct ubus_request_data *req, const char *method,
+ struct blob_attr *msg)
+{
+ struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus);
+ struct uh_ubus_session *ses;
+ struct blob_attr *tb[__UH_UBUS_SA_MAX];
+ struct blob_attr *attr, *sattr;
+ const char *object, *function;
+ int rem1, rem2;
+
+ blobmsg_parse(acl_policy, __UH_UBUS_SA_MAX, tb, blob_data(msg), blob_len(msg));
+
+ if (!tb[UH_UBUS_SA_SID])
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
+ ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SA_SID]));
+
+ if (!ses)
+ return UBUS_STATUS_NOT_FOUND;
+
+ if (!tb[UH_UBUS_SA_OBJECTS])
+ {
+ uh_ubus_session_revoke(ses, ctx, NULL, NULL);
+ }
+ else
+ {
+ blobmsg_for_each_attr(attr, tb[UH_UBUS_SA_OBJECTS], rem1)
+ {
+ if (blob_id(attr) != BLOBMSG_TYPE_ARRAY)
+ continue;
+
+ object = NULL;
+ function = NULL;
+
+ blobmsg_for_each_attr(sattr, attr, rem2)
+ {
+ if (blob_id(sattr) != BLOBMSG_TYPE_STRING)
+ continue;
+
+ if (!object)
+ object = blobmsg_data(sattr);
+ else if (!function)
+ function = blobmsg_data(sattr);
+ else
+ break;
+ }
+
+ if (object && function)
+ uh_ubus_session_revoke(ses, ctx, object, function);
+ }
+ }
+
+ return 0;
+}
+
+static int
+uh_ubus_handle_set(struct ubus_context *ctx, struct ubus_object *obj,
+ struct ubus_request_data *req, const char *method,
+ struct blob_attr *msg)
+{
+ struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus);
+ struct uh_ubus_session *ses;
+ struct uh_ubus_session_data *data;
+ struct blob_attr *tb[__UH_UBUS_SA_MAX];
+ struct blob_attr *attr;
+ int rem;
+
+ blobmsg_parse(set_policy, __UH_UBUS_SS_MAX, tb, blob_data(msg), blob_len(msg));
+
+ if (!tb[UH_UBUS_SS_SID] || !tb[UH_UBUS_SS_VALUES])
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
+ ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SS_SID]));
+
+ if (!ses)
+ return UBUS_STATUS_NOT_FOUND;
+
+ blobmsg_for_each_attr(attr, tb[UH_UBUS_SS_VALUES], rem)
+ {
+ if (!blobmsg_name(attr)[0])
+ continue;
+
+ data = avl_find_element(&ses->data, blobmsg_name(attr), data, avl);
+
+ if (data)
+ {
+ avl_delete(&ses->data, &data->avl);
+ free(data);
+ }
+
+ data = malloc(sizeof(*data) + blob_pad_len(attr));
+
+ if (!data)
+ break;
+
+ memset(data, 0, sizeof(*data) + blob_pad_len(attr));
+ memcpy(data->attr, attr, blob_pad_len(attr));
+
+ data->avl.key = blobmsg_name(data->attr);
+ avl_insert(&ses->data, &data->avl);
+ }
+
+ return 0;
+}
+
+static int
+uh_ubus_handle_get(struct ubus_context *ctx, struct ubus_object *obj,
+ struct ubus_request_data *req, const char *method,
+ struct blob_attr *msg)
+{
+ struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus);
+ struct uh_ubus_session *ses;
+ struct uh_ubus_session_data *data;
+ struct blob_attr *tb[__UH_UBUS_SA_MAX];
+ struct blob_attr *attr;
+ struct blob_buf b;
+ void *c;
+ int rem;
+
+ blobmsg_parse(get_policy, __UH_UBUS_SG_MAX, tb, blob_data(msg), blob_len(msg));
+
+ if (!tb[UH_UBUS_SG_SID])
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
+ ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SG_SID]));
+
+ if (!ses)
+ return UBUS_STATUS_NOT_FOUND;
+
+ memset(&b, 0, sizeof(b));
+ blob_buf_init(&b, 0);
+ c = blobmsg_open_table(&b, "values");
+
+ if (!tb[UH_UBUS_SG_KEYS])
+ {
+ uh_ubus_session_dump_data(ses, &b);
+ }
+ else
+ {
+ blobmsg_for_each_attr(attr, tb[UH_UBUS_SG_KEYS], rem)
+ {
+ if (blob_id(attr) != BLOBMSG_TYPE_STRING)
+ continue;
+
+ data = avl_find_element(&ses->data, blobmsg_data(attr), data, avl);
+
+ if (!data)
+ continue;
+
+ blobmsg_add_field(&b, blobmsg_type(data->attr),
+ blobmsg_name(data->attr),
+ blobmsg_data(data->attr),
+ blobmsg_data_len(data->attr));
+ }
+ }
+
+ blobmsg_close_table(&b, c);
+ ubus_send_reply(ctx, req, b.head);
+ blob_buf_free(&b);
+
+ return 0;
+}
+
+static int
+uh_ubus_handle_unset(struct ubus_context *ctx, struct ubus_object *obj,
+ struct ubus_request_data *req, const char *method,
+ struct blob_attr *msg)
+{
+ struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus);
+ struct uh_ubus_session *ses;
+ struct uh_ubus_session_data *data, *ndata;
+ struct blob_attr *tb[__UH_UBUS_SA_MAX];
+ struct blob_attr *attr;
+ int rem;
+
+ blobmsg_parse(get_policy, __UH_UBUS_SG_MAX, tb, blob_data(msg), blob_len(msg));
+
+ if (!tb[UH_UBUS_SG_SID])
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
+ ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SG_SID]));
+
+ if (!ses)
+ return UBUS_STATUS_NOT_FOUND;
+
+ if (!tb[UH_UBUS_SG_KEYS])
+ {
+ avl_remove_all_elements(&ses->data, data, avl, ndata)
+ free(data);
+ }
+ else
+ {
+ blobmsg_for_each_attr(attr, tb[UH_UBUS_SG_KEYS], rem)
+ {
+ if (blob_id(attr) != BLOBMSG_TYPE_STRING)
+ continue;
+
+ data = avl_find_element(&ses->data, blobmsg_data(attr), data, avl);
+
+ if (!data)
+ continue;
+
+ avl_delete(&ses->data, &data->avl);
+ free(data);
+ }
+ }
+
+ return 0;
+}
+
+static int
+uh_ubus_handle_destroy(struct ubus_context *ctx, struct ubus_object *obj,
+ struct ubus_request_data *req, const char *method,
+ struct blob_attr *msg)
+{
+ struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus);
+ struct uh_ubus_session *ses;
+ struct blob_attr *tb[__UH_UBUS_SA_MAX];
+
+ blobmsg_parse(sid_policy, __UH_UBUS_SI_MAX, tb, blob_data(msg), blob_len(msg));
+
+ if (!tb[UH_UBUS_SI_SID])
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
+ ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SI_SID]));
+
+ if (!ses)
+ return UBUS_STATUS_NOT_FOUND;
+
+ uh_ubus_session_destroy(state, ses);
+
+ return 0;
+}
+
+
+struct uh_ubus_state *
+uh_ubus_init(const struct config *conf)
+{
+ int rv;
+ struct uh_ubus_state *state;
+ struct ubus_object *session_object;
+
+ static struct ubus_method session_methods[] = {
+ UBUS_METHOD("create", uh_ubus_handle_create, new_policy),
+ UBUS_METHOD("list", uh_ubus_handle_list, sid_policy),
+ UBUS_METHOD("grant", uh_ubus_handle_grant, acl_policy),
+ UBUS_METHOD("revoke", uh_ubus_handle_revoke, acl_policy),
+ UBUS_METHOD("set", uh_ubus_handle_set, set_policy),
+ UBUS_METHOD("get", uh_ubus_handle_get, get_policy),
+ UBUS_METHOD("unset", uh_ubus_handle_unset, get_policy),
+ UBUS_METHOD("destroy", uh_ubus_handle_destroy, sid_policy),
+ };
+
+ static struct ubus_object_type session_type =
+ UBUS_OBJECT_TYPE("uhttpd", session_methods);
+
+ state = malloc(sizeof(*state));
+
+ if (!state)
+ {
+ fprintf(stderr, "Unable to allocate memory for ubus state\n");
+ exit(1);
+ }
+
+ memset(state, 0, sizeof(*state));
+ state->ctx = ubus_connect(conf->ubus_socket);
+ state->timeout = conf->script_timeout;
+
+ if (!state->ctx)
+ {
+ fprintf(stderr, "Unable to connect to ubus socket\n");
+ exit(1);
+ }
+
+ ubus_add_uloop(state->ctx);
+
+ session_object = &state->ubus;
+ session_object->name = "session";
+ session_object->type = &session_type;
+ session_object->methods = session_methods;
+ session_object->n_methods = ARRAY_SIZE(session_methods);
+
+ rv = ubus_add_object(state->ctx, &state->ubus);
+
+ if (rv)
+ {
+ fprintf(stderr, "Unable to publish ubus object: %s\n",
+ ubus_strerror(rv));
+ exit(1);
+ }
+
+ blob_buf_init(&state->buf, 0);
+ avl_init(&state->sessions, uh_ubus_avlcmp, false, NULL);
+
+ return state;
+}
+
+
+static bool
+uh_ubus_request_parse_url(struct client *cl, char **sid, char **obj, char **fun)
+{
+ char *url = cl->request.url + strlen(cl->server->conf->ubus_prefix);
+
+ for (; url && *url == '/'; *url++ = 0);
+ *sid = url;
+
+ for (url = url ? strchr(url, '/') : NULL; url && *url == '/'; *url++ = 0);
+ *obj = url;
+
+ for (url = url ? strchr(url, '/') : NULL; url && *url == '/'; *url++ = 0);
+ *fun = url;
+
+ for (url = url ? strchr(url, '/') : NULL; url && *url == '/'; *url++ = 0);
+ return (*sid && *obj && *fun);
+}
+
+static bool
+uh_ubus_request_parse_post(struct client *cl, int len, struct blob_buf *b)
+{
+ int rlen;
+ bool rv = false;
+ char buf[UH_LIMIT_MSGHEAD];
+
+ struct json_object *obj = NULL;
+ struct json_tokener *tok = NULL;
+
+ if (!len)
+ return NULL;
+
+ memset(b, 0, sizeof(*b));
+ blob_buf_init(b, 0);
+
+ tok = json_tokener_new();
+
+ while (len > 0)
+ {
+ /* remaining data in http head buffer ... */
+ if (cl->httpbuf.len > 0)
+ {
+ rlen = min(len, cl->httpbuf.len);
+
+ D("ubus: feed %d HTTP buffer bytes\n", rlen);
+
+ memcpy(buf, cl->httpbuf.ptr, rlen);
+
+ cl->httpbuf.len -= rlen;
+ cl->httpbuf.ptr += rlen;
+ }
+
+ /* read it from socket ... */
+ else
+ {
+ ensure_out(rlen = uh_tcp_recv(cl, buf, min(len, sizeof(buf))));
+
+ if ((rlen < 0) && ((errno == EAGAIN) || (errno == EWOULDBLOCK)))
+ break;
+
+ D("ubus: feed %d/%d TCP socket bytes\n",
+ rlen, min(len, sizeof(buf)));
+ }
+
+ obj = json_tokener_parse_ex(tok, buf, rlen);
+ len -= rlen;
+
+ if (tok->err != json_tokener_continue && !is_error(obj))
+ break;
+ }
+
+out:
+ if (!is_error(obj))
+ {
+ if (json_object_get_type(obj) == json_type_object)
+ {
+ rv = true;
+ json_object_object_foreach(obj, key, val)
+ {
+ if (!blobmsg_add_json_element(b, key, val))
+ {
+ rv = false;
+ break;
+ }
+ }
+ }
+
+ json_object_put(obj);
+ }
+
+ json_tokener_free(tok);
+
+ if (!rv)
+ blob_buf_free(b);
+
+ return rv;
+}
+
+static void
+uh_ubus_request_cb(struct ubus_request *req, int type, struct blob_attr *msg)
+{
+ int len;
+ char *str;
+ struct client *cl = (struct client *)req->priv;
+
+ if (!msg)
+ {
+ uh_http_sendhf(cl, 204, "No content", "Function did not return data\n");
+ return;
+ }
+
+ str = blobmsg_format_json_indent(msg, true, 0);
+ len = strlen(str);
+
+ ensure_out(uh_http_sendf(cl, NULL, "HTTP/1.0 200 OK\r\n"));
+ ensure_out(uh_http_sendf(cl, NULL, "Content-Type: application/json\r\n"));
+ ensure_out(uh_http_sendf(cl, NULL, "Content-Length: %i\r\n\r\n", len));
+ ensure_out(uh_http_send(cl, NULL, str, len));
+
+out:
+ free(str);
+}
+
+bool
+uh_ubus_request(struct client *cl, struct uh_ubus_state *state)
+{
+ int i, len = 0;
+ bool access = false;
+ char *sid, *obj, *fun;
+
+ struct blob_buf buf;
+ struct uh_ubus_session *ses;
+ struct uh_ubus_session_acl *acl;
+
+ uint32_t obj_id;
+
+
+ memset(&buf, 0, sizeof(buf));
+ blob_buf_init(&buf, 0);
+
+ if (!uh_ubus_request_parse_url(cl, &sid, &obj, &fun))
+ {
+ uh_http_sendhf(cl, 400, "Bad Request", "Invalid Request\n");
+ goto out;
+ }
+
+ if (!(ses = uh_ubus_session_get(state, sid)))
+ {
+ uh_http_sendhf(cl, 404, "Not Found", "No such session\n");
+ goto out;
+ }
+
+ avl_for_each_element(&ses->acls, acl, avl)
+ {
+ if (uh_ubus_strmatch(obj, acl->object) &&
+ uh_ubus_strmatch(fun, acl->function))
+ {
+ access = true;
+ break;
+ }
+ }
+
+ if (!access)
+ {
+ uh_http_sendhf(cl, 403, "Denied", "Access to object denied\n");
+ goto out;
+ }
+
+ /* find content length */
+ if (cl->request.method == UH_HTTP_MSG_POST)
+ {
+ foreach_header(i, cl->request.headers)
+ {
+ if (!strcasecmp(cl->request.headers[i], "Content-Length"))
+ {
+ len = atoi(cl->request.headers[i+1]);
+ break;
+ }
+ }
+ }
+
+ if (len > UH_UBUS_MAX_POST_SIZE)
+ {
+ uh_http_sendhf(cl, 413, "Too Large", "Message too big\n");
+ goto out;
+ }
+
+ if (len && !uh_ubus_request_parse_post(cl, len, &buf))
+ {
+ uh_http_sendhf(cl, 400, "Bad Request", "Invalid JSON data\n");
+ goto out;
+ }
+
+ if (ubus_lookup_id(state->ctx, obj, &obj_id))
+ {
+ uh_http_sendhf(cl, 500, "Internal Error", "Unable to lookup object\n");
+ goto out;
+ }
+
+ if (ubus_invoke(state->ctx, obj_id, fun, buf.head,
+ uh_ubus_request_cb, cl, state->timeout * 1000))
+ {
+ uh_http_sendhf(cl, 500, "Internal Error", "Unable to invoke function\n");
+ goto out;
+ }
+
+out:
+ blob_buf_free(&buf);
+ return false;
+}
+
+void
+uh_ubus_close(struct uh_ubus_state *state)
+{
+ if (state->ctx)
+ ubus_free(state->ctx);
+
+ free(state);
+}
projects / openwrt / svn-archive / archive.git / commitdiff