service/validate.c

   1 /*
   2  * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU Lesser General Public License version 2.1
   6  * as published by the Free Software Foundation
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #include <libubox/blobmsg_json.h>
  15 #include <libubox/avl-cmp.h>
  16 #include <json-c/json.h>
  17
  18 #include "../procd.h"
  19
  20 #include "service.h"
  21
  22 enum {
  23         SERVICE_VAL_PACKAGE,
  24         SERVICE_VAL_TYPE,
  25         SERVICE_VAL_DATA,
  26         __SERVICE_VAL_MAX
  27 };
  28
  29 static const struct blobmsg_policy service_validate_attrs[__SERVICE_VAL_MAX] = {
  30         [SERVICE_VAL_PACKAGE] = { "package", BLOBMSG_TYPE_STRING },
  31         [SERVICE_VAL_TYPE] = { "type", BLOBMSG_TYPE_STRING },
  32         [SERVICE_VAL_DATA] = { "data", BLOBMSG_TYPE_TABLE },
  33 };
  34
  35 static AVL_TREE(validators, avl_strcmp, true, NULL);
  36
  37 void
  38 service_validate_dump_all(struct blob_buf *b, char *p, char *s)
  39 {
  40         struct json_object *r = json_object_new_object();
  41         struct validate *v;
  42
  43         if (!r)
  44                 return;
  45
  46         avl_for_each_element(&validators, v, avl) {
  47                 struct json_object *o, *t;
  48                 struct vrule *vr;
  49
  50                 if (p && strcmp(p, v->package))
  51                         continue;
  52
  53                 if (s && strcmp(s, v->type))
  54                         continue;
  55
  56                 json_object_object_get_ex(r, v->package, &o);
  57                 if (!o) {
  58                         o = json_object_new_object();
  59                         json_object_object_add(r, v->package, o);
  60                 }
  61                 json_object_object_get_ex(o, v->type, &t);
  62                 if (!t) {
  63                         t = json_object_new_object();
  64                         json_object_object_add(o, v->type, t);
  65                 }
  66                 avl_for_each_element(&v->rules, vr, avl)
  67                         json_object_object_add(t, vr->option, json_object_new_string(vr->rule));
  68         }
  69         blobmsg_add_object(b, r);
  70         json_object_put(r);
  71 }
  72
  73 void
  74 service_validate_dump(struct blob_buf *b, struct service *s)
  75 {
  76         struct validate *v;
  77         void *i = blobmsg_open_array(b, "validate");
  78
  79         list_for_each_entry(v, &s->validators, list) {
  80                 struct vrule *vr;
  81                 void *k, *j = blobmsg_open_table(b, "validate");
  82
  83                 blobmsg_add_string(b, "package", v->package);
  84                 blobmsg_add_string(b, "type", v->type);
  85                 k = blobmsg_open_table(b, "rules");
  86                 avl_for_each_element(&v->rules, vr, avl)
  87                         blobmsg_add_string(b, vr->option, vr->rule);
  88                 blobmsg_close_table(b, k);
  89                 blobmsg_close_table(b, j);
  90         }
  91         blobmsg_close_array(b, i);
  92 }
  93
  94 void
  95 service_validate_del(struct service *s)
  96 {
  97         struct validate *v, *n;
  98
  99         if (list_empty(&s->validators))
 100                 return;
 101
 102         list_for_each_entry_safe(v, n, &s->validators, list) {
 103                 struct vrule *vr, *a;
 104
 105                 avl_remove_all_elements(&v->rules, vr, avl, a)
 106                         free(vr);
 107
 108                 avl_delete(&validators, &v->avl);
 109                 list_del(&v->list);
 110                 free(v);
 111         }
 112 }
 113
 114 void
 115 service_validate_add(struct service *s, struct blob_attr *msg)
 116 {
 117         struct blob_attr *tb[__SERVICE_VAL_MAX];
 118         struct validate *v;
 119         char *type, *package;
 120         struct blob_attr *cur;
 121         int rem;
 122
 123         blobmsg_parse(service_validate_attrs, __SERVICE_VAL_MAX, tb, blobmsg_data(msg), blobmsg_data_len(msg));
 124         if (!tb[SERVICE_VAL_PACKAGE] || !tb[SERVICE_VAL_TYPE] || !tb[SERVICE_VAL_DATA])
 125                 return;
 126
 127         v = calloc_a(sizeof(*v), &package, blobmsg_data_len(tb[SERVICE_VAL_PACKAGE]) + 1,
 128                          &type, blobmsg_data_len(tb[SERVICE_VAL_TYPE]) + 1);
 129         if (!v)
 130                 return;
 131
 132         v->type = type;
 133         v->avl.key = v->package = package;
 134         strcpy(v->package, blobmsg_get_string(tb[SERVICE_VAL_PACKAGE]));
 135         strcpy(v->type, blobmsg_get_string(tb[SERVICE_VAL_TYPE]));
 136
 137         list_add(&v->list, &s->validators);
 138         if (avl_insert(&validators, &v->avl)) {
 139                 free(v);
 140                 return;
 141         }
 142         avl_init(&v->rules, avl_strcmp, false, NULL);
 143
 144         blobmsg_for_each_attr(cur, tb[SERVICE_VAL_DATA], rem) {
 145                 char *option;
 146                 char *rule;
 147                 struct vrule *vr = calloc_a(sizeof(*vr), &option, strlen(blobmsg_name(cur)) + 1,
 148                         &rule, strlen(blobmsg_get_string(cur)) + 1);
 149
 150                 vr->avl.key = vr->option = option;
 151                 vr->rule = rule;
 152                 strcpy(vr->option, blobmsg_name(cur));
 153                 strcpy(vr->rule, blobmsg_get_string(cur));
 154                 if (avl_insert(&v->rules, &vr->avl))
 155                         free(vr);
 156         }
 157 }