netifd: Add rpfilter config support
[project/netifd.git] / config.c
index 86c2599..6691e61 100644 (file)
--- a/config.c
+++ b/config.c
@@ -1,3 +1,17 @@
+/*
+ * netifd - network interface daemon
+ * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#define _GNU_SOURCE
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
 
 #include "netifd.h"
 #include "interface.h"
+#include "interface-ip.h"
+#include "iprule.h"
 #include "proto.h"
+#include "wireless.h"
 #include "config.h"
 
 bool config_init = false;
 
 static struct uci_context *uci_ctx;
 static struct uci_package *uci_network;
+static struct uci_package *uci_wireless;
 static struct blob_buf b;
 
-static void uci_attr_to_blob(struct blob_buf *b, const char *str,
-                            const char *name, enum blobmsg_type type)
-{
-       char *err;
-       int intval;
-
-       switch (type) {
-       case BLOBMSG_TYPE_STRING:
-               blobmsg_add_string(b, name, str);
-               break;
-       case BLOBMSG_TYPE_BOOL:
-               if (!strcmp(str, "true") || !strcmp(str, "1"))
-                       intval = 1;
-               else if (!strcmp(str, "false") || !strcmp(str, "0"))
-                       intval = 0;
-               else
-                       return;
-
-               blobmsg_add_u8(b, name, intval);
-               break;
-       case BLOBMSG_TYPE_INT32:
-               intval = strtol(str, &err, 0);
-               if (*err)
-                       return;
-
-               blobmsg_add_u32(b, name, intval);
-               break;
-       default:
-               break;
-       }
-}
-
-static void uci_array_to_blob(struct blob_buf *b, struct uci_option *o,
-                             enum blobmsg_type type)
-{
-       struct uci_element *e;
-       char *str, *next, *word;
-
-       if (o->type == UCI_TYPE_LIST) {
-               uci_foreach_element(&o->v.list, e) {
-                       uci_attr_to_blob(b, e->name, NULL, type);
-               }
-               return;
-       }
-
-       str = strdup(o->v.string);
-       next = str;
-
-       while ((word = strsep(&next, " \t")) != NULL) {
-               if (!*word)
-                       continue;
-
-               uci_attr_to_blob(b, word, NULL, type);
-       }
-
-       free(str);
-}
-
-static void __uci_to_blob(struct blob_buf *b, struct uci_section *s,
-                         const struct config_param_list *p)
+static int
+config_section_idx(struct uci_section *s)
 {
-       const struct blobmsg_policy *attr = NULL;
        struct uci_element *e;
-       struct uci_option *o;
-       void *array;
-       int i;
-
-       uci_foreach_element(&s->options, e) {
-               for (i = 0; i < p->n_params; i++) {
-                       attr = &p->params[i];
-                       if (!strcmp(attr->name, e->name))
-                               break;
-               }
-
-               if (i == p->n_params)
-                       continue;
+       int idx = 0;
 
-               o = uci_to_option(e);
+       uci_foreach_element(&uci_wireless->sections, e) {
+               struct uci_section *cur = uci_to_section(e);
 
-               if (attr->type == BLOBMSG_TYPE_ARRAY) {
-                       if (!p->info)
-                               continue;
+               if (s == cur)
+                       return idx;
 
-                       array = blobmsg_open_array(b, attr->name);
-                       uci_array_to_blob(b, o, p->info[i].type);
-                       blobmsg_close_array(b, array);
-                       continue;
-               }
-
-               if (o->type == UCI_TYPE_LIST)
-                       continue;
-
-               uci_attr_to_blob(b, o->v.string, attr->name, attr->type);
+               if (!strcmp(cur->type, s->type))
+                       idx++;
        }
-}
 
-static void uci_to_blob(struct blob_buf *b, struct uci_section *s,
-                       const struct config_param_list *p)
-{
-       int i;
-
-       __uci_to_blob(b, s, p);
-       for (i = 0; i < p->n_next; i++)
-               uci_to_blob(b, s, p->next[i]);
+       return -1;
 }
 
 static int
@@ -142,38 +73,59 @@ config_parse_bridge_interface(struct uci_section *s)
 }
 
 static void
-config_parse_interface(struct uci_section *s)
+config_parse_interface(struct uci_section *s, bool alias)
 {
        struct interface *iface;
-       const char *type;
+       const char *type = NULL, *disabled;
        struct blob_attr *config;
        struct device *dev;
+       bool bridge = false;
+
+       disabled = uci_lookup_option_string(uci_ctx, s, "disabled");
+       if (disabled && !strcmp(disabled, "1"))
+               return;
 
        blob_buf_init(&b, 0);
 
-       type = uci_lookup_option_string(uci_ctx, s, "type");
-       if (type && !strcmp(type, "bridge"))
+       if (!alias)
+               type = uci_lookup_option_string(uci_ctx, s, "type");
+       if (type && !strcmp(type, "bridge")) {
                if (config_parse_bridge_interface(s))
                        return;
 
+               bridge = true;
+       }
+
        uci_to_blob(&b, s, &interface_attr_list);
-       iface = calloc(1, sizeof(*iface));
+
+       iface = interface_alloc(s->e.name, b.head);
        if (!iface)
                return;
 
-       interface_init(iface, s->e.name, b.head);
-
        if (iface->proto_handler && iface->proto_handler->config_params)
                uci_to_blob(&b, s, iface->proto_handler->config_params);
 
-       config = malloc(blob_pad_len(b.head));
-       if (!config) {
-               free(iface);
-               return;
+       if (!bridge && uci_to_blob(&b, s, simple_device_type.config_params))
+               iface->device_config = true;
+
+       config = blob_memdup(b.head);
+       if (!config)
+               goto error;
+
+       if (alias) {
+               if (!interface_add_alias(iface, config))
+                       goto error_free_config;
+       } else {
+               interface_add(iface, config);
        }
 
-       memcpy(config, b.head, blob_pad_len(b.head));
-       interface_add(iface, config);
+       /*
+        * need to look up the interface name again, in case of config update,
+        * the pointer will have changed
+        */
+       iface = vlist_find(&interfaces, s->e.name, iface, node);
+       if (!iface)
+               return;
 
        dev = iface->main_dev.dev;
        if (!dev || !dev->default_config)
@@ -185,6 +137,35 @@ config_parse_interface(struct uci_section *s)
                return;
 
        device_set_config(dev, dev->type, b.head);
+       return;
+error_free_config:
+       free(config);
+error:
+       free(iface);
+}
+
+static void
+config_parse_route(struct uci_section *s, bool v6)
+{
+       void *route;
+
+       blob_buf_init(&b, 0);
+       route = blobmsg_open_array(&b, "route");
+       uci_to_blob(&b, s, &route_attr_list);
+       blobmsg_close_array(&b, route);
+       interface_ip_add_route(NULL, blob_data(b.head), v6);
+}
+
+static void
+config_parse_rule(struct uci_section *s, bool v6)
+{
+       void *rule;
+
+       blob_buf_init(&b, 0);
+       rule = blobmsg_open_array(&b, "rule");
+       uci_to_blob(&b, s, &rule_attr_list);
+       blobmsg_close_array(&b, rule);
+       iprule_add(blob_data(b.head), v6);
 }
 
 static void
@@ -194,7 +175,7 @@ config_init_devices(void)
 
        uci_foreach_element(&uci_network->sections, e) {
                struct uci_section *s = uci_to_section(e);
-               const struct device_type *devtype;
+               const struct device_type *devtype = NULL;
                const char *type, *name;
 
                if (strcmp(s->type, "device") != 0)
@@ -205,9 +186,20 @@ config_init_devices(void)
                        continue;
 
                type = uci_lookup_option_string(uci_ctx, s, "type");
-               if (type && !strcmp(type, "bridge"))
-                       devtype = &bridge_device_type;
-               else
+               if (type) {
+                       if (!strcmp(type, "8021ad"))
+                               devtype = &vlandev_device_type;
+                       else if (!strcmp(type, "8021q"))
+                               devtype = &vlandev_device_type;
+                       else if (!strcmp(type, "bridge"))
+                               devtype = &bridge_device_type;
+                       else if (!strcmp(type, "macvlan"))
+                               devtype = &macvlan_device_type;
+                       else if (!strcmp(type, "tunnel"))
+                               devtype = &tunnel_device_type;
+               }
+
+               if (!devtype)
                        devtype = &simple_device_type;
 
                blob_buf_init(&b, 0);
@@ -216,154 +208,224 @@ config_init_devices(void)
        }
 }
 
-bool
-config_diff(struct blob_attr **tb1, struct blob_attr **tb2,
-           const struct config_param_list *config, unsigned long *diff)
+static struct uci_package *
+config_init_package(const char *config)
 {
-       bool ret = false;
-       int i;
+       struct uci_context *ctx = uci_ctx;
+       struct uci_package *p = NULL;
 
-       for (i = 0; i < config->n_params; i++) {
-               if (!tb1[i] && !tb2[i])
-                       continue;
+       if (!ctx) {
+               ctx = uci_alloc_context();
+               uci_ctx = ctx;
 
-               if (!!tb1[i] != !!tb2[i])
-                       goto mark;
+               ctx->flags &= ~UCI_FLAG_STRICT;
+               if (config_path)
+                       uci_set_confdir(ctx, config_path);
 
-               if (blob_len(tb1[i]) != blob_len(tb2[i]))
-                       goto mark;
+#ifdef DUMMY_MODE
+               uci_set_savedir(ctx, "./tmp");
+#endif
+       } else {
+               p = uci_lookup_package(ctx, config);
+               if (p)
+                       uci_unload(ctx, p);
+       }
+
+       if (uci_load(ctx, config, &p))
+               return NULL;
 
-               if (memcmp(tb1[i], tb2[i], blob_raw_len(tb1[i])) != 0)
-                       goto mark;
+       return p;
+}
 
-               continue;
+static void
+config_init_interfaces(void)
+{
+       struct uci_element *e;
 
-mark:
-               ret = true;
-               if (diff)
-                       set_bit(diff, i);
-               else
-                       return ret;
+       uci_foreach_element(&uci_network->sections, e) {
+               struct uci_section *s = uci_to_section(e);
+
+               if (!strcmp(s->type, "interface"))
+                       config_parse_interface(s, false);
        }
 
-       return ret;
+       uci_foreach_element(&uci_network->sections, e) {
+               struct uci_section *s = uci_to_section(e);
+
+               if (!strcmp(s->type, "alias"))
+                       config_parse_interface(s, true);
+       }
 }
 
+static void
+config_init_routes(void)
+{
+       struct interface *iface;
+       struct uci_element *e;
+
+       vlist_for_each_element(&interfaces, iface, node)
+               interface_ip_update_start(&iface->config_ip);
 
-static bool
-__config_check_equal(struct blob_attr *c1, struct blob_attr *c2,
-                    const struct config_param_list *config)
+       uci_foreach_element(&uci_network->sections, e) {
+               struct uci_section *s = uci_to_section(e);
+
+               if (!strcmp(s->type, "route"))
+                       config_parse_route(s, false);
+               else if (!strcmp(s->type, "route6"))
+                       config_parse_route(s, true);
+       }
+
+       vlist_for_each_element(&interfaces, iface, node)
+               interface_ip_update_complete(&iface->config_ip);
+}
+
+static void
+config_init_rules(void)
 {
-       struct blob_attr **tb1, **tb2;
+       struct uci_element *e;
 
-       if (!!c1 ^ !!c2)
-               return false;
+       iprule_update_start();
 
-       if (!c1 && !c2)
-               return true;
+       uci_foreach_element(&uci_network->sections, e) {
+               struct uci_section *s = uci_to_section(e);
 
-       tb1 = alloca(config->n_params * sizeof(struct blob_attr *));
-       blobmsg_parse(config->params, config->n_params, tb1,
-               blob_data(c1), blob_len(c1));
+               if (!strcmp(s->type, "rule"))
+                       config_parse_rule(s, false);
+               else if (!strcmp(s->type, "rule6"))
+                       config_parse_rule(s, true);
+       }
+
+       iprule_update_complete();
+}
 
-       tb2 = alloca(config->n_params * sizeof(struct blob_attr *));
-       blobmsg_parse(config->params, config->n_params, tb2,
-               blob_data(c2), blob_len(c2));
+static void
+config_init_globals(void)
+{
+       struct uci_section *globals = uci_lookup_section(
+                       uci_ctx, uci_network, "globals");
+       if (!globals)
+               return;
 
-       return !config_diff(tb1, tb2, config, NULL);
+       const char *ula_prefix = uci_lookup_option_string(
+                       uci_ctx, globals, "ula_prefix");
+       interface_ip_set_ula_prefix(ula_prefix);
 }
 
-bool
-config_check_equal(struct blob_attr *c1, struct blob_attr *c2,
-                  const struct config_param_list *config)
+static void
+config_parse_wireless_device(struct uci_section *s)
 {
-       int i;
+       struct wireless_driver *drv;
+       const char *driver_name;
 
-       if (!__config_check_equal(c1, c2, config))
-               return false;
+       driver_name = uci_lookup_option_string(uci_ctx, s, "type");
+       if (!driver_name)
+               return;
 
-       for (i = 0; i < config->n_next; i++) {
-               if (!__config_check_equal(c1, c2, config->next[i]))
-                       return false;
-       }
+       drv = avl_find_element(&wireless_drivers, driver_name, drv, node);
+       if (!drv)
+               return;
 
-       return true;
+       blob_buf_init(&b, 0);
+       uci_to_blob(&b, s, drv->device.config);
+       wireless_device_create(drv, s->e.name, b.head);
 }
 
-struct blob_attr *
-config_memdup(struct blob_attr *attr)
+static void
+config_parse_wireless_interface(struct wireless_device *wdev, struct uci_section *s)
 {
-       struct blob_attr *ret;
-       int size = blob_pad_len(attr);
+       char *name;
 
-       ret = malloc(size);
-       if (!ret)
-               return NULL;
+       name = alloca(strlen(s->type) + 16);
+       sprintf(name, "@%s[%d]", s->type, config_section_idx(s));
 
-       memcpy(ret, attr, size);
-       return ret;
+       blob_buf_init(&b, 0);
+       uci_to_blob(&b, s, wdev->drv->interface.config);
+       wireless_interface_create(wdev, b.head, s->anonymous ? name : s->e.name);
 }
 
-static struct uci_package *
-config_init_package(const char *config)
+static void
+config_init_wireless(void)
 {
-       struct uci_context *ctx = uci_ctx;
-       struct uci_package *p = NULL;
+       struct wireless_device *wdev;
+       struct uci_element *e;
+       const char *dev_name;
 
-       if (!ctx) {
-               ctx = uci_alloc_context();
-               uci_ctx = ctx;
+       if (!uci_wireless) {
+               DPRINTF("No wireless configuration found\n");
+               return;
+       }
 
-#ifdef DUMMY_MODE
-               uci_set_confdir(ctx, "./config");
-               uci_set_savedir(ctx, "./tmp");
-#endif
-       } else {
-               p = uci_lookup_package(ctx, config);
-               if (p)
-                       uci_unload(ctx, p);
+       vlist_update(&wireless_devices);
+
+       uci_foreach_element(&uci_wireless->sections, e) {
+               struct uci_section *s = uci_to_section(e);
+               if (strcmp(s->type, "wifi-device") != 0)
+                       continue;
+
+               config_parse_wireless_device(s);
        }
 
-       if (uci_load(ctx, "network", &p))
-               return NULL;
+       vlist_flush(&wireless_devices);
 
-       return p;
+       vlist_for_each_element(&wireless_devices, wdev, node) {
+               wdev->vif_idx = 0;
+               vlist_update(&wdev->interfaces);
+       }
+
+       uci_foreach_element(&uci_wireless->sections, e) {
+               struct uci_section *s = uci_to_section(e);
+
+               if (strcmp(s->type, "wifi-iface") != 0)
+                       continue;
+
+               dev_name = uci_lookup_option_string(uci_ctx, s, "device");
+               if (!dev_name)
+                       continue;
+
+               wdev = vlist_find(&wireless_devices, dev_name, wdev, node);
+               if (!wdev) {
+                       DPRINTF("device %s not found!\n", dev_name);
+                       continue;
+               }
+
+               config_parse_wireless_interface(wdev, s);
+       }
+
+       vlist_for_each_element(&wireless_devices, wdev, node)
+               vlist_flush(&wdev->interfaces);
 }
 
 void
-config_init_interfaces(const char *name)
+config_init_all(void)
 {
-       struct uci_package *p = NULL;
-       struct uci_element *e;
-
-       p = config_init_package("network");
-       if (!p) {
+       uci_network = config_init_package("network");
+       if (!uci_network) {
                fprintf(stderr, "Failed to load network config\n");
                return;
        }
 
-       uci_network = p;
+       uci_wireless = config_init_package("wireless");
+
+       vlist_update(&interfaces);
        config_init = true;
        device_lock();
 
        device_reset_config();
        config_init_devices();
-
-       uci_foreach_element(&p->sections, e) {
-               struct uci_section *s = uci_to_section(e);
-
-               if (name && strcmp(s->e.name, name) != 0)
-                       continue;
-
-               if (!strcmp(s->type, "interface"))
-                       config_parse_interface(s);
-       }
+       config_init_interfaces();
+       config_init_routes();
+       config_init_rules();
+       config_init_globals();
+       config_init_wireless();
 
        config_init = false;
        device_unlock();
 
        device_reset_old();
        device_init_pending();
+       vlist_flush(&interfaces);
        device_free_unused(NULL);
+       interface_refresh_assignments(false);
        interface_start_pending();
+       wireless_start_pending();
 }