parse.c

   1 /*
   2  *   This program is free software; you can redistribute it and/or modify
   3  *   it under the terms of the GNU General Public License as published by
   4  *   the Free Software Foundation; either version 2 of the License.
   5  *
   6  *   This program is distributed in the hope that it will be useful,
   7  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  *   GNU General Public License for more details.
  10  *
  11  *   You should have received a copy of the GNU General Public License
  12  *   along with this program; if not, write to the Free Software
  13  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  14  *
  15  *   Copyright (C) 2020 embedd.ch
  16  *   Copyright (C) 2020 Felix Fietkau <nbd@nbd.name>
  17  *   Copyright (C) 2020 John Crispin <john@phrozen.org>
  18  */
  19
  20 #include "usteer.h"
  21 #include "remote.h"
  22
  23 bool parse_apmsg(struct apmsg *msg, struct blob_attr *data)
  24 {
  25         static const struct blob_attr_info policy[__APMSG_MAX] = {
  26                 [APMSG_ID] = { .type = BLOB_ATTR_INT32 },
  27                 [APMSG_SEQ] = { .type = BLOB_ATTR_INT32 },
  28                 [APMSG_NODES] = { .type = BLOB_ATTR_NESTED },
  29         };
  30         struct blob_attr *tb[__APMSG_MAX];
  31
  32         blob_parse(data, tb, policy, __APMSG_MAX);
  33         if (!tb[APMSG_ID] || !tb[APMSG_SEQ] || !tb[APMSG_NODES])
  34                 return false;
  35
  36         msg->id = blob_get_int32(tb[APMSG_ID]);
  37         msg->seq = blob_get_int32(tb[APMSG_SEQ]);
  38         msg->nodes = tb[APMSG_NODES];
  39
  40         return true;
  41 }
  42
  43 static int
  44 get_int32(struct blob_attr *attr)
  45 {
  46         if (!attr)
  47                 return 0;
  48
  49         return blob_get_int32(attr);
  50 }
  51
  52 bool parse_apmsg_node(struct apmsg_node *msg, struct blob_attr *data)
  53 {
  54         static const struct blob_attr_info policy[__APMSG_NODE_MAX] = {
  55                 [APMSG_NODE_NAME] = { .type = BLOB_ATTR_STRING },
  56                 [APMSG_NODE_FREQ] = { .type = BLOB_ATTR_INT32 },
  57                 [APMSG_NODE_N_ASSOC] = { .type = BLOB_ATTR_INT32 },
  58                 [APMSG_NODE_MAX_ASSOC] = { .type = BLOB_ATTR_INT32 },
  59                 [APMSG_NODE_STATIONS] = { .type = BLOB_ATTR_NESTED },
  60                 [APMSG_NODE_NOISE] = { .type = BLOB_ATTR_INT32 },
  61                 [APMSG_NODE_LOAD] = { .type = BLOB_ATTR_INT32 },
  62                 [APMSG_NODE_RRM_NR] = { .type = BLOB_ATTR_NESTED },
  63                 [APMSG_NODE_NODE_INFO] = { .type = BLOB_ATTR_NESTED },
  64         };
  65         struct blob_attr *tb[__APMSG_NODE_MAX];
  66         struct blob_attr *cur;
  67
  68         blob_parse(data, tb, policy, __APMSG_NODE_MAX);
  69         if (!tb[APMSG_NODE_NAME] ||
  70             !tb[APMSG_NODE_FREQ] ||
  71             !tb[APMSG_NODE_N_ASSOC] ||
  72             !tb[APMSG_NODE_STATIONS] ||
  73             !tb[APMSG_NODE_SSID])
  74                 return false;
  75
  76         msg->name = blob_data(tb[APMSG_NODE_NAME]);
  77         msg->n_assoc = blob_get_int32(tb[APMSG_NODE_N_ASSOC]);
  78         msg->freq = blob_get_int32(tb[APMSG_NODE_FREQ]);
  79         msg->stations = tb[APMSG_NODE_STATIONS];
  80         msg->ssid = blob_data(tb[APMSG_NODE_SSID]);
  81
  82         msg->noise = get_int32(tb[APMSG_NODE_NOISE]);
  83         msg->load = get_int32(tb[APMSG_NODE_LOAD]);
  84         msg->max_assoc = get_int32(tb[APMSG_NODE_MAX_ASSOC]);
  85         msg->rrm_nr = NULL;
  86
  87         cur = tb[APMSG_NODE_RRM_NR];
  88         if (cur && blob_len(cur) >= sizeof(struct blob_attr) &&
  89             blob_len(cur) >= blob_pad_len(blob_data(cur))) {
  90                 int rem;
  91
  92                 msg->rrm_nr = blob_data(cur);
  93
  94                 blobmsg_for_each_attr(cur, msg->rrm_nr, rem) {
  95                         if (blobmsg_check_attr(cur, false))
  96                                 continue;
  97                         if (blobmsg_type(cur) == BLOBMSG_TYPE_STRING)
  98                                 continue;
  99                         msg->rrm_nr = NULL;
 100                         break;
 101                 }
 102
 103                 if (msg->rrm_nr &&
 104                     blobmsg_type(msg->rrm_nr) != BLOBMSG_TYPE_ARRAY)
 105                         msg->rrm_nr = NULL;
 106         }
 107
 108         msg->node_info = tb[APMSG_NODE_NODE_INFO];
 109
 110         return true;
 111 }
 112
 113 bool parse_apmsg_sta(struct apmsg_sta *msg, struct blob_attr *data)
 114 {
 115         static const struct blob_attr_info policy[__APMSG_STA_MAX] = {
 116                 [APMSG_STA_ADDR] = { .type = BLOB_ATTR_BINARY },
 117                 [APMSG_STA_SIGNAL] = { .type = BLOB_ATTR_INT32 },
 118                 [APMSG_STA_SEEN] = { .type = BLOB_ATTR_INT32 },
 119                 [APMSG_STA_TIMEOUT] = { .type = BLOB_ATTR_INT32 },
 120                 [APMSG_STA_CONNECTED] = { .type = BLOB_ATTR_INT8 },
 121         };
 122         struct blob_attr *tb[__APMSG_STA_MAX];
 123
 124         blob_parse(data, tb, policy, __APMSG_STA_MAX);
 125         if (!tb[APMSG_STA_ADDR] ||
 126             !tb[APMSG_STA_SIGNAL] ||
 127             !tb[APMSG_STA_SEEN] ||
 128             !tb[APMSG_STA_TIMEOUT] ||
 129             !tb[APMSG_STA_CONNECTED])
 130                 return false;
 131
 132         if (blob_len(tb[APMSG_STA_ADDR]) != sizeof(msg->addr))
 133                 return false;
 134
 135         memcpy(msg->addr, blob_data(tb[APMSG_STA_ADDR]), sizeof(msg->addr));
 136         msg->signal = blob_get_int32(tb[APMSG_STA_SIGNAL]);
 137         msg->seen = blob_get_int32(tb[APMSG_STA_SEEN]);
 138         msg->timeout = blob_get_int32(tb[APMSG_STA_TIMEOUT]);
 139         msg->connected = blob_get_int8(tb[APMSG_STA_CONNECTED]);
 140
 141         return true;
 142 }