add some configuration code for interfaces, bind interfaces to regular devices
[project/netifd.git] / config.c
1 #include <string.h>
2 #include <stdlib.h>
3 #include <stdio.h>
4
5 #include <sys/types.h>
6 #include <sys/socket.h>
7 #include <net/ethernet.h>
8
9 #include "netifd.h"
10 #include "interface.h"
11
12 struct uci_context *uci_ctx;
13 struct uci_package *uci_network;
14 bool config_init = false;
15
16 enum {
17         SIF_TYPE,
18         SIF_IFNAME,
19         __SIF_MAX,
20 };
21
22 static const struct uci_parse_option if_opts[__SIF_MAX] = {
23         [SIF_TYPE] = { "type", UCI_TYPE_STRING },
24         [SIF_IFNAME] = { "ifname", UCI_TYPE_STRING },
25 };
26
27 static void
28 config_parse_interface(struct uci_section *s)
29 {
30         struct uci_option *opts[__SIF_MAX];
31         struct interface *iface;
32         struct device *dev;
33         const char *type;
34
35         DPRINTF("Create interface '%s'\n", s->e.name);
36
37         iface = alloc_interface(s->e.name);
38         if (!iface)
39                 return;
40
41         uci_parse_section(s, if_opts, __SIF_MAX, opts);
42
43         if (opts[SIF_TYPE]) {
44                 type = opts[SIF_TYPE]->v.string;
45
46                 if (!strcmp(type, "bridge")) {
47                         interface_attach_bridge(iface, s);
48                         return;
49                 }
50         }
51
52         if (opts[SIF_IFNAME]) {
53                 dev = get_device(opts[SIF_IFNAME]->v.string, true);
54                 if (!dev)
55                         return;
56
57                 add_device_user(&iface->main_dev, dev);
58         }
59 }
60
61 enum {
62         SDEV_NAME,
63         SDEV_TYPE,
64         SDEV_MTU,
65         SDEV_MACADDR,
66         SDEV_TXQUEUELEN,
67         __SDEV_MAX,
68 };
69
70 static const struct uci_parse_option dev_opts[__SDEV_MAX] = {
71         [SDEV_NAME] = { "name", UCI_TYPE_STRING },
72         [SDEV_TYPE] = { "type", UCI_TYPE_STRING },
73         [SDEV_MTU] = { "mtu", UCI_TYPE_STRING },
74         [SDEV_MACADDR] = { "macaddr", UCI_TYPE_STRING },
75         [SDEV_TXQUEUELEN] = { "txqueuelen", UCI_TYPE_STRING },
76 };
77
78 static bool
79 add_int_option(struct uci_option *o, unsigned int *dest)
80 {
81         char *error = NULL;
82         int val;
83
84         if (!o)
85                 return false;
86
87         val = strtoul(o->v.string, &error, 0);
88         if (error && *error)
89                 return false;
90
91         *dest = val;
92         return true;
93 }
94
95 static void
96 config_init_device_settings(struct device *dev, struct uci_option **opts)
97 {
98         struct ether_addr *ea;
99
100         dev->flags = 0;
101
102         if (add_int_option(opts[SDEV_MTU], &dev->mtu))
103                 dev->flags |= DEV_OPT_MTU;
104
105         if (add_int_option(opts[SDEV_TXQUEUELEN], &dev->txqueuelen))
106                 dev->flags |= DEV_OPT_TXQUEUELEN;
107
108         if (opts[SDEV_MACADDR]) {
109                 ea = ether_aton(opts[SDEV_MACADDR]->v.string);
110                 if (ea) {
111                         memcpy(dev->macaddr, ea, sizeof(dev->macaddr));
112                         dev->flags |= DEV_OPT_MACADDR;
113                 }
114         }
115 }
116
117 void
118 config_init_devices(void)
119 {
120         struct uci_element *e;
121         struct device *dev;
122         struct uci_option *opts[__SDEV_MAX];
123
124         uci_foreach_element(&uci_network->sections, e) {
125                 struct uci_section *s = uci_to_section(e);
126
127                 if (strcmp(s->type, "device") != 0)
128                         continue;
129
130                 uci_parse_section(s, dev_opts, __SDEV_MAX, opts);
131                 if (!opts[SDEV_NAME])
132                         continue;
133
134                 dev = NULL;
135                 if (opts[SDEV_TYPE]) {
136                         const char *type = opts[SDEV_TYPE]->v.string;
137
138                         if (!strcmp(type, "bridge"))
139                                 dev = bridge_create(opts[SDEV_NAME]->v.string, s);
140                 } else {
141                         dev = get_device(opts[SDEV_NAME]->v.string, true);
142                 }
143
144                 if (!dev)
145                         continue;
146
147                 config_init_device_settings(dev, opts);
148                 dev->config_hash = uci_hash_options(opts, __SDEV_MAX);
149         }
150 }
151
152 void
153 config_init_interfaces(const char *name)
154 {
155         struct uci_context *ctx;
156         struct uci_package *p = NULL;
157         struct uci_element *e;
158
159         ctx = uci_alloc_context();
160         uci_ctx = ctx;
161
162         uci_set_confdir(ctx, "./config");
163
164         if (uci_load(ctx, "network", &p)) {
165                 fprintf(stderr, "Failed to load network config\n");
166                 return;
167         }
168
169         uci_network = p;
170         config_init = true;
171
172         config_init_devices();
173
174         uci_foreach_element(&p->sections, e) {
175                 struct uci_section *s = uci_to_section(e);
176
177                 if (name && strcmp(s->e.name, name) != 0)
178                         continue;
179
180                 if (!strcmp(s->type, "interface"))
181                         config_parse_interface(s);
182         }
183         config_init = false;
184
185         start_pending_interfaces();
186 }