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Sources/usteer/netifd.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 "node.h"
 22 
 23 static struct blob_buf b;
 24 
 25 static void
 26 netifd_parse_interface_config(struct usteer_local_node *ln, struct blob_attr *msg)
 27 {
 28         static const struct blobmsg_policy policy = {
 29                 .name = "maxassoc",
 30                 .type = BLOBMSG_TYPE_INT32,
 31         };
 32         struct blob_attr *cur;
 33         int val = 0;
 34 
 35         blobmsg_parse(&policy, 1, &cur, blobmsg_data(msg), blobmsg_data_len(msg));
 36         if (cur)
 37                 val = blobmsg_get_u32(cur);
 38 
 39         ln->node.max_assoc = val;
 40         ln->netifd.status_complete = true;
 41 }
 42 
 43 static void
 44 netifd_parse_interface(struct usteer_local_node *ln, struct blob_attr *msg)
 45 {
 46         enum {
 47                 N_IF_CONFIG,
 48                 N_IF_NAME,
 49                 __N_IF_MAX
 50         };
 51         static const struct blobmsg_policy policy[__N_IF_MAX] = {
 52                 [N_IF_CONFIG] = { .name = "config", .type = BLOBMSG_TYPE_TABLE },
 53                 [N_IF_NAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
 54         };
 55         struct blob_attr *tb[__N_IF_MAX];
 56 
 57         if (blobmsg_type(msg) != BLOBMSG_TYPE_TABLE)
 58                 return;
 59 
 60         blobmsg_parse(policy, __N_IF_MAX, tb, blobmsg_data(msg), blobmsg_data_len(msg));
 61         if (!tb[N_IF_CONFIG] || !tb[N_IF_NAME])
 62                 return;
 63 
 64         if (strcmp(blobmsg_get_string(tb[N_IF_NAME]), ln->iface) != 0)
 65                 return;
 66 
 67         netifd_parse_interface_config(ln, tb[N_IF_CONFIG]);
 68 }
 69 
 70 static void
 71 netifd_parse_radio(struct usteer_local_node *ln, struct blob_attr *msg)
 72 {
 73         static const struct blobmsg_policy policy = {
 74                 .name = "interfaces",
 75                 .type = BLOBMSG_TYPE_ARRAY,
 76         };
 77         struct blob_attr *cur, *iface;
 78         int rem;
 79 
 80         if (blobmsg_type(msg) != BLOBMSG_TYPE_TABLE)
 81                 return;
 82 
 83         blobmsg_parse(&policy, 1, &iface, blobmsg_data(msg), blobmsg_data_len(msg));
 84         if (!iface)
 85                 return;
 86 
 87         blobmsg_for_each_attr(cur, iface, rem)
 88                 netifd_parse_interface(ln, cur);
 89 }
 90 
 91 static void
 92 netifd_status_cb(struct ubus_request *req, int type, struct blob_attr *msg)
 93 {
 94         struct usteer_local_node *ln;
 95         struct blob_attr *cur;
 96         int rem;
 97 
 98         ln = container_of(req, struct usteer_local_node, netifd.req);
 99         ln->netifd.req_pending = false;
100 
101         blobmsg_for_each_attr(cur, msg, rem)
102                 netifd_parse_radio(ln, cur);
103 }
104 
105 static void netifd_update_node(struct usteer_node *node)
106 {
107         struct usteer_local_node *ln;
108         uint32_t id;
109 
110         ln = container_of(node, struct usteer_local_node, node);
111         if (ln->netifd.status_complete)
112                 return;
113 
114         if (ln->netifd.req_pending)
115                 ubus_abort_request(ubus_ctx, &ln->netifd.req);
116 
117         if (ubus_lookup_id(ubus_ctx, "network.wireless", &id))
118                 return;
119 
120         blob_buf_init(&b, 0);
121         ubus_invoke_async(ubus_ctx, id, "status", b.head, &ln->netifd.req);
122         ln->netifd.req.data_cb = netifd_status_cb;
123         ubus_complete_request_async(ubus_ctx, &ln->netifd.req);
124         ln->netifd.req_pending = true;
125 }
126 
127 static void netifd_init_node(struct usteer_node *node)
128 {
129         struct usteer_local_node *ln;
130 
131         ln = container_of(node, struct usteer_local_node, node);
132         ln->netifd.status_complete = false;
133         netifd_update_node(node);
134 }
135 
136 static void netifd_free_node(struct usteer_node *node)
137 {
138         struct usteer_local_node *ln;
139 
140         ln = container_of(node, struct usteer_local_node, node);
141         if (ln->netifd.req_pending)
142                 ubus_abort_request(ubus_ctx, &ln->netifd.req);
143 }
144 
145 static struct usteer_node_handler netifd_handler = {
146         .init_node = netifd_init_node,
147         .update_node = netifd_update_node,
148         .free_node = netifd_free_node,
149 };
150 
151 static void __usteer_init usteer_netifd_init(void)
152 {
153         list_add(&netifd_handler.list, &node_handlers);
154 }
155 

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