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- #include <string.h>
- #include <stdlib.h>
- #include <stdio.h>
- #include <unistd.h>
- #include <arpa/inet.h>
- #include "netifd.h"
- #include "device.h"
- #include "interface.h"
- #include "interface-ip.h"
- #include "proto.h"
- #include "ubus.h"
- #include "system.h"
- enum {
- ROUTE_INTERFACE,
- ROUTE_TARGET,
- ROUTE_MASK,
- ROUTE_GATEWAY,
- ROUTE_METRIC,
- ROUTE_MTU,
- __ROUTE_MAX
- };
- static const struct blobmsg_policy route_attr[__ROUTE_MAX] = {
- [ROUTE_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
- [ROUTE_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
- [ROUTE_MASK] = { .name = "netmask", .type = BLOBMSG_TYPE_STRING },
- [ROUTE_GATEWAY] = { .name = "gateway", .type = BLOBMSG_TYPE_STRING },
- [ROUTE_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 },
- [ROUTE_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
- };
- const struct config_param_list route_attr_list = {
- .n_params = __ROUTE_MAX,
- .params = route_attr,
- };
- void
- interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6)
- {
- struct interface_ip_settings *ip;
- struct blob_attr *tb[__ROUTE_MAX], *cur;
- struct device_route *route;
- int af = v6 ? AF_INET6 : AF_INET;
- blobmsg_parse(route_attr, __ROUTE_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
- if (!iface) {
- if ((cur = tb[ROUTE_INTERFACE]) == NULL)
- return;
- iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
- if (!iface)
- return;
- ip = &iface->config_ip;
- } else {
- ip = &iface->proto_ip;
- }
- route = calloc(1, sizeof(*route));
- if (!route)
- return;
- route->mask = v6 ? 128 : 32;
- if ((cur = tb[ROUTE_MASK]) != NULL) {
- route->mask = parse_netmask_string(blobmsg_data(cur), v6);
- if (route->mask > (v6 ? 128 : 32))
- goto error;
- }
- if ((cur = tb[ROUTE_TARGET]) != NULL) {
- if (!inet_pton(af, blobmsg_data(cur), &route->addr)) {
- DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur));
- goto error;
- }
- }
- if ((cur = tb[ROUTE_GATEWAY]) != NULL) {
- if (!inet_pton(af, blobmsg_data(cur), &route->nexthop)) {
- DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur));
- goto error;
- }
- }
- if ((cur = tb[ROUTE_METRIC]) != NULL)
- route->metric = blobmsg_get_u32(cur);
- if ((cur = tb[ROUTE_MTU]) != NULL)
- route->mtu = blobmsg_get_u32(cur);
- vlist_add(&ip->route, &route->node, &route->mask);
- return;
- error:
- free(route);
- }
- static int
- addr_cmp(const void *k1, const void *k2, void *ptr)
- {
- return memcmp(k1, k2, sizeof(struct device_addr) -
- offsetof(struct device_addr, mask));
- }
- static int
- route_cmp(const void *k1, const void *k2, void *ptr)
- {
- return memcmp(k1, k2, sizeof(struct device_route) -
- offsetof(struct device_route, mask));
- }
- static void
- interface_update_proto_addr(struct vlist_tree *tree,
- struct vlist_node *node_new,
- struct vlist_node *node_old)
- {
- struct interface_ip_settings *ip;
- struct interface *iface;
- struct device *dev;
- struct device_addr *a_new = NULL, *a_old = NULL;
- bool keep = false;
- ip = container_of(tree, struct interface_ip_settings, addr);
- iface = ip->iface;
- dev = iface->l3_dev->dev;
- if (node_new) {
- a_new = container_of(node_new, struct device_addr, node);
- if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
- !a_new->broadcast) {
- uint32_t mask = ~0;
- uint32_t *a = (uint32_t *) &a_new->addr;
- mask >>= a_new->mask;
- a_new->broadcast = *a | mask;
- }
- }
- if (node_old)
- a_old = container_of(node_old, struct device_addr, node);
- if (a_new && a_old) {
- keep = true;
- if (a_old->flags != a_new->flags)
- keep = false;
- if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
- a_new->broadcast != a_old->broadcast)
- keep = false;
- }
- if (node_old) {
- if (!(a_old->flags & DEVADDR_EXTERNAL) && a_old->enabled && !keep)
- system_del_address(dev, a_old);
- free(a_old);
- }
- if (node_new) {
- if (!(a_new->flags & DEVADDR_EXTERNAL) && !keep)
- system_add_address(dev, a_new);
- a_new->enabled = true;
- }
- }
- static bool
- enable_route(struct interface_ip_settings *ip, struct device_route *route)
- {
- if (ip->no_defaultroute && !route->mask)
- return false;
- return true;
- }
- static void
- interface_update_proto_route(struct vlist_tree *tree,
- struct vlist_node *node_new,
- struct vlist_node *node_old)
- {
- struct interface_ip_settings *ip;
- struct interface *iface;
- struct device *dev;
- struct device_route *route_old, *route_new;
- bool keep = false;
- ip = container_of(tree, struct interface_ip_settings, route);
- iface = ip->iface;
- dev = iface->l3_dev->dev;
- route_old = container_of(node_old, struct device_route, node);
- route_new = container_of(node_new, struct device_route, node);
- if (node_old && node_new)
- keep = !memcmp(&route_old->nexthop, &route_new->nexthop, sizeof(route_old->nexthop));
- if (node_old) {
- if (!(route_old->flags & DEVADDR_EXTERNAL) && route_old->enabled && !keep)
- system_del_route(dev, route_old);
- free(route_old);
- }
- if (node_new) {
- bool _enabled = enable_route(ip, route_new);
- if (!(route_new->flags & DEVADDR_EXTERNAL) && !keep && _enabled)
- system_add_route(dev, route_new);
- route_new->enabled = _enabled;
- }
- }
- void
- interface_add_dns_server(struct interface_ip_settings *ip, const char *str)
- {
- struct dns_server *s;
- s = calloc(1, sizeof(*s));
- s->af = AF_INET;
- if (inet_pton(s->af, str, &s->addr.in))
- goto add;
- s->af = AF_INET6;
- if (inet_pton(s->af, str, &s->addr.in))
- goto add;
- free(s);
- return;
- add:
- D(INTERFACE, "Add IPv%c DNS server: %s\n",
- s->af == AF_INET6 ? '6' : '4', str);
- vlist_simple_add(&ip->dns_servers, &s->node);
- }
- void
- interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list)
- {
- struct blob_attr *cur;
- int rem;
- blobmsg_for_each_attr(cur, list, rem) {
- if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
- continue;
- if (!blobmsg_check_attr(cur, NULL))
- continue;
- interface_add_dns_server(ip, blobmsg_data(cur));
- }
- }
- static void
- interface_add_dns_search_domain(struct interface_ip_settings *ip, const char *str)
- {
- struct dns_search_domain *s;
- int len = strlen(str);
- s = calloc(1, sizeof(*s) + len + 1);
- if (!s)
- return;
- D(INTERFACE, "Add DNS search domain: %s\n", str);
- memcpy(s->name, str, len);
- vlist_simple_add(&ip->dns_search, &s->node);
- }
- void
- interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list)
- {
- struct blob_attr *cur;
- int rem;
- blobmsg_for_each_attr(cur, list, rem) {
- if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
- continue;
- if (!blobmsg_check_attr(cur, NULL))
- continue;
- interface_add_dns_search_domain(ip, blobmsg_data(cur));
- }
- }
- static void
- write_resolv_conf_entries(FILE *f, struct interface_ip_settings *ip)
- {
- struct dns_server *s;
- struct dns_search_domain *d;
- const char *str;
- char buf[32];
- vlist_simple_for_each_element(&ip->dns_servers, s, node) {
- str = inet_ntop(s->af, &s->addr, buf, sizeof(buf));
- if (!str)
- continue;
- fprintf(f, "nameserver %s\n", str);
- }
- vlist_simple_for_each_element(&ip->dns_search, d, node) {
- fprintf(f, "search %s\n", d->name);
- }
- }
- void
- interface_write_resolv_conf(void)
- {
- struct interface *iface;
- char *path = alloca(strlen(resolv_conf) + 5);
- FILE *f;
- sprintf(path, "%s.tmp", resolv_conf);
- unlink(path);
- f = fopen(path, "w");
- if (!f) {
- D(INTERFACE, "Failed to open %s for writing\n", path);
- return;
- }
- vlist_for_each_element(&interfaces, iface, node) {
- if (iface->state != IFS_UP)
- continue;
- if (vlist_simple_empty(&iface->proto_ip.dns_search) &&
- vlist_simple_empty(&iface->proto_ip.dns_servers) &&
- vlist_simple_empty(&iface->config_ip.dns_search) &&
- vlist_simple_empty(&iface->config_ip.dns_servers))
- continue;
- fprintf(f, "# Interface %s\n", iface->name);
- write_resolv_conf_entries(f, &iface->config_ip);
- write_resolv_conf_entries(f, &iface->proto_ip);
- }
- fclose(f);
- if (rename(path, resolv_conf) < 0) {
- D(INTERFACE, "Failed to replace %s\n", resolv_conf);
- unlink(path);
- }
- }
- void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled)
- {
- struct device_addr *addr;
- struct device_route *route;
- struct device *dev;
- ip->enabled = enabled;
- dev = ip->iface->l3_dev->dev;
- if (!dev)
- return;
- vlist_for_each_element(&ip->addr, addr, node) {
- if (addr->enabled == enabled)
- continue;
- if (enabled)
- system_add_address(dev, addr);
- else
- system_del_address(dev, addr);
- addr->enabled = enabled;
- }
- vlist_for_each_element(&ip->route, route, node) {
- bool _enabled = enabled;
- if (!enable_route(ip, route))
- _enabled = false;
- if (route->enabled == _enabled)
- continue;
- if (_enabled)
- system_add_route(dev, route);
- else
- system_del_route(dev, route);
- route->enabled = _enabled;
- }
- }
- void
- interface_ip_update_start(struct interface_ip_settings *ip)
- {
- vlist_simple_update(&ip->dns_servers);
- vlist_simple_update(&ip->dns_search);
- vlist_update(&ip->route);
- vlist_update(&ip->addr);
- }
- void
- interface_ip_update_complete(struct interface_ip_settings *ip)
- {
- vlist_simple_flush(&ip->dns_servers);
- vlist_simple_flush(&ip->dns_search);
- vlist_flush(&ip->route);
- vlist_flush(&ip->addr);
- }
- void
- interface_ip_flush(struct interface_ip_settings *ip)
- {
- vlist_simple_flush_all(&ip->dns_servers);
- vlist_simple_flush_all(&ip->dns_search);
- vlist_flush_all(&ip->route);
- vlist_flush_all(&ip->addr);
- }
- void
- interface_ip_init(struct interface_ip_settings *ip, struct interface *iface)
- {
- ip->iface = iface;
- ip->enabled = true;
- vlist_simple_init(&ip->dns_search, struct dns_search_domain, node);
- vlist_simple_init(&ip->dns_servers, struct dns_server, node);
- vlist_init(&ip->route, route_cmp, interface_update_proto_route);
- vlist_init(&ip->addr, addr_cmp, interface_update_proto_addr);
- }
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