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#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include "netifd.h"
#include "interface.h"
#include "interface-ip.h"
#include "proto.h"
#include "system.h"
enum {
OPT_IPADDR,
OPT_IP6ADDR,
OPT_NETMASK,
OPT_GATEWAY,
OPT_IP6GW,
OPT_DNS,
__OPT_MAX,
};
static const struct blobmsg_policy static_attrs[__OPT_MAX] = {
[OPT_IPADDR] = { .name = "ipaddr", .type = BLOBMSG_TYPE_ARRAY },
[OPT_IP6ADDR] = { .name = "ip6addr", .type = BLOBMSG_TYPE_ARRAY },
[OPT_NETMASK] = { .name = "netmask", .type = BLOBMSG_TYPE_STRING },
[OPT_GATEWAY] = { .name = "gateway", .type = BLOBMSG_TYPE_STRING },
[OPT_IP6GW] = { .name = "ip6gw", .type = BLOBMSG_TYPE_STRING },
[OPT_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
};
static const union config_param_info static_attr_info[__OPT_MAX] = {
[OPT_IPADDR] = { .type = BLOBMSG_TYPE_STRING },
[OPT_IP6ADDR] = { .type = BLOBMSG_TYPE_STRING },
[OPT_DNS] = { .type = BLOBMSG_TYPE_STRING },
};
static const struct config_param_list static_attr_list = {
.n_params = __OPT_MAX,
.params = static_attrs,
.info = static_attr_info,
};
struct static_proto_state {
struct interface_proto_state proto;
struct blob_attr *config;
};
static bool
parse_addr(struct interface *iface, const char *str, bool v6, int mask)
{
struct device_addr *addr;
addr = proto_parse_ip_addr_string(str, v6, mask);
if (!addr) {
interface_add_error(iface, "proto-static", "INVALID_ADDRESS", &str, 1);
return false;
}
vlist_add(&iface->proto_ip.addr, &addr->node);
return true;
}
static int
parse_address_option(struct interface *iface, struct blob_attr *attr, bool v6, int netmask)
{
struct blob_attr *cur;
int n_addr = 0;
int rem;
blobmsg_for_each_attr(cur, attr, rem) {
n_addr++;
if (!parse_addr(iface, blobmsg_data(cur), v6, netmask))
return -1;
}
return n_addr;
}
static bool
parse_gateway_option(struct interface *iface, struct blob_attr *attr, bool v6)
{
struct device_route *route;
const char *str = blobmsg_data(attr);
int af = v6 ? AF_INET6 : AF_INET;
route = calloc(1, sizeof(*route));
if (!inet_pton(af, str, &route->nexthop)) {
interface_add_error(iface, "proto-static",
"INVALID_GATEWAY", &str, 1);
free(route);
return false;
}
route->mask = 0;
route->flags = DEVADDR_DEVICE | (v6 ? DEVADDR_INET6 : DEVADDR_INET4);
vlist_add(&iface->proto_ip.route, &route->node);
return true;
}
static int
proto_apply_static_settings(struct interface *iface, struct blob_attr *attr)
{
struct blob_attr *tb[__OPT_MAX];
const char *error;
unsigned int netmask = 32;
int n_v4 = 0, n_v6 = 0;
blobmsg_parse(static_attrs, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
if (tb[OPT_NETMASK]) {
netmask = parse_netmask_string(blobmsg_data(tb[OPT_NETMASK]), false);
if (netmask > 32) {
error = "INVALID_NETMASK";
goto error;
}
}
if (tb[OPT_IPADDR])
n_v4 = parse_address_option(iface, tb[OPT_IPADDR], false, netmask);
if (tb[OPT_IP6ADDR])
n_v6 = parse_address_option(iface, tb[OPT_IP6ADDR], true, netmask);
if (!n_v4 && !n_v6) {
error = "NO_ADDRESS";
goto error;
}
if (n_v4 < 0 || n_v6 < 0)
goto out;
if (n_v4 && tb[OPT_GATEWAY]) {
if (!parse_gateway_option(iface, tb[OPT_GATEWAY], false))
goto out;
}
if (n_v6 && tb[OPT_IP6GW]) {
if (!parse_gateway_option(iface, tb[OPT_IP6GW], true))
goto out;
}
if (tb[OPT_DNS])
interface_add_dns_server_list(&iface->proto_ip, tb[OPT_DNS]);
return 0;
error:
interface_add_error(iface, "proto-static", error, NULL, 0);
out:
return -1;
}
static bool
static_proto_setup(struct static_proto_state *state)
{
return proto_apply_static_settings(state->proto.iface, state->config) == 0;
}
static int
static_handler(struct interface_proto_state *proto,
enum interface_proto_cmd cmd, bool force)
{
struct static_proto_state *state;
int ret = 0;
state = container_of(proto, struct static_proto_state, proto);
switch (cmd) {
case PROTO_CMD_SETUP:
if (!static_proto_setup(state))
return -1;
break;
case PROTO_CMD_TEARDOWN:
break;
}
return ret;
}
static void
static_free(struct interface_proto_state *proto)
{
struct static_proto_state *state;
state = container_of(proto, struct static_proto_state, proto);
free(state->config);
free(state);
}
struct interface_proto_state *
static_attach(const struct proto_handler *h, struct interface *iface,
struct blob_attr *attr)
{
struct static_proto_state *state;
state = calloc(1, sizeof(*state));
if (!state)
return NULL;
state->config = malloc(blob_pad_len(attr));
if (!state->config)
goto error;
memcpy(state->config, attr, blob_pad_len(attr));
state->proto.free = static_free;
state->proto.cb = static_handler;
return &state->proto;
error:
free(state);
return NULL;
}
static struct proto_handler static_proto = {
.name = "static",
.flags = PROTO_FLAG_IMMEDIATE,
.config_params = &static_attr_list,
.attach = static_attach,
};
static void __init
static_proto_init(void)
{
add_proto_handler(&static_proto);
}
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