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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2022 Felix Fietkau <nbd@nbd.name>
*/
#define _GNU_SOURCE
#include <unistd.h>
#include <arpa/inet.h>
#include <libubox/uloop.h>
#include <libubox/blobmsg_json.h>
#include "unetd.h"
struct cmdline_network {
struct cmdline_network *next;
char *data;
};
static struct cmdline_network *cmd_nets;
static const char *hosts_file;
const char *mssfix_path = UNETD_MSS_BPF_PATH;
const char *data_dir = UNETD_DATA_DIR;
int global_pex_port = UNETD_GLOBAL_PEX_PORT;
static bool debug;
#ifdef UBUS_SUPPORT
static struct udebug ud;
static struct udebug_buf udb_log;
static const struct udebug_buf_meta meta_log = {
.name = "log",
.format = UDEBUG_FORMAT_STRING
};
static struct udebug_ubus_ring rings[] = {
{
.buf = &udb_log,
.meta = &meta_log,
.default_entries = 1024,
.default_size = 64 * 1024,
}
};
#endif
bool unetd_debug_active(void)
{
#ifdef UBUS_SUPPORT
if (udebug_buf_valid(&udb_log))
return true;
#endif
return debug;
}
static void __attribute__((format (printf, 1, 0)))
unetd_udebug_vprintf(const char *format, va_list ap)
{
#ifdef UBUS_SUPPORT
if (!udebug_buf_valid(&udb_log))
return;
udebug_entry_init(&udb_log);
udebug_entry_vprintf(&udb_log, format, ap);
udebug_entry_add(&udb_log);
#endif
}
void unetd_debug_printf(const char *format, ...)
{
va_list ap;
va_start(ap, format);
if (debug) {
va_list ap2;
va_copy(ap2, ap);
vfprintf(stderr, format, ap2);
va_end(ap2);
}
unetd_udebug_vprintf(format, ap);
va_end(ap);
}
#ifdef UBUS_SUPPORT
void unetd_udebug_config(struct udebug_ubus *ctx, struct blob_attr *data,
bool enabled)
{
udebug_ubus_apply_config(&ud, rings, ARRAY_SIZE(rings), data, enabled);
}
#endif
static void
network_write_hosts(struct network *net, FILE *f)
{
struct network_host *host;
char ip[INET6_ADDRSTRLEN];
if (!net->net_config.local_host)
return;
avl_for_each_element(&net->hosts, host, node) {
inet_ntop(AF_INET6, &host->peer.local_addr, ip, sizeof(ip));
fprintf(f, "%s\t%s%s%s\n", ip, network_host_name(host),
net->config.domain ? "." : "",
net->config.domain ? net->config.domain : "");
}
}
void unetd_write_hosts(void)
{
struct network *net;
char *tmpfile = NULL;
FILE *f;
int fd;
if (!hosts_file)
return;
if (asprintf(&tmpfile, "%s.XXXXXXXX", hosts_file) < 0)
return;
fd = mkstemp(tmpfile);
if (fd < 0) {
perror("mkstemp");
goto out;
}
chmod(tmpfile, 0644);
f = fdopen(fd, "w");
if (!f) {
close(fd);
goto out;
}
avl_for_each_element(&networks, net, node)
network_write_hosts(net, f);
fclose(f);
if (rename(tmpfile, hosts_file))
unlink(tmpfile);
out:
free(tmpfile);
}
static void add_networks(void)
{
struct cmdline_network *net;
static struct blob_buf b;
struct blob_attr *name;
for (net = cmd_nets; net; net = net->next) {
blob_buf_init(&b, 0);
if (!blobmsg_add_json_from_string(&b, net->data))
continue;
blobmsg_parse(&network_policy[NETWORK_ATTR_NAME], 1, &name,
blobmsg_data(b.head), blobmsg_len(b.head));
if (!name)
continue;
unetd_network_add(blobmsg_get_string(name), b.head);
}
blob_buf_free(&b);
}
int main(int argc, char **argv)
{
struct cmdline_network *net;
const char *unix_socket = NULL;
int ch;
while ((ch = getopt(argc, argv, "D:dh:u:M:N:P:")) != -1) {
switch (ch) {
case 'D':
data_dir = optarg;
break;
case 'd':
debug = true;
break;
case 'h':
hosts_file = optarg;
break;
case 'N':
net = calloc(1, sizeof(*net));
net->next = cmd_nets;
net->data = optarg;
cmd_nets = net;
break;
case 'M':
mssfix_path = optarg;
break;
case 'P':
global_pex_port = atoi(optarg);
break;
case 'u':
unix_socket = optarg;
break;
}
}
uloop_init();
#ifdef UBUS_SUPPORT
udebug_init(&ud);
udebug_auto_connect(&ud, NULL);
for (size_t i = 0; i < ARRAY_SIZE(rings); i++)
udebug_ubus_ring_init(&ud, &rings[i]);
#endif
unetd_ubus_init();
unetd_write_hosts();
global_pex_open(unix_socket);
add_networks();
uloop_run();
pex_close();
network_free_all();
uloop_done();
return 0;
}
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