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utun2/tools/chatgui-android/libutun_lite/instance_lite.c

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/*
* instance_lite.c — lightweight uTun instance lifecycle for Android
*
* Kotlin sends INI config text → parse_config_from_buf →
* utun_instance_create_from_config → sqlite3_open → utun_instance_init →
* pthread with uasync_poll loop.
*
* Mirrors UtunNode::runLoop() from tools/chatgui/transport/utun_node.cpp:221-372.
*/
#include "instance_lite.h"
#include "utun_instance.h"
#include "config_parser.h"
#include "config_updater.h"
#include "secure_channel.h"
#include "etcp_router.h"
#include "topo_node_sqlite.h"
#include "chat/chat_core.h"
#include "chat/chat_sync.h"
#include "chat/chat_event.h"
#include "u_async.h"
#include "sqlite3.h"
#include "mem.h"
#include "debug_config.h"
#include "../jni_bridge/android_udp_log.h"
#include <pthread.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <openssl/evp.h>
#ifdef __ANDROID__
#include <android/log.h>
#define IL_LOGV(fmt, ...) __android_log_print(ANDROID_LOG_VERBOSE, "utun-inst", fmt, ##__VA_ARGS__)
#define IL_LOGI(fmt, ...) __android_log_print(ANDROID_LOG_INFO, "utun-inst", fmt, ##__VA_ARGS__)
#define IL_LOGE(fmt, ...) __android_log_print(ANDROID_LOG_ERROR, "utun-inst", fmt, ##__VA_ARGS__)
#else
#define IL_LOGV(fmt, ...) fprintf(stderr, fmt "\n", ##__VA_ARGS__)
#define IL_LOGI(fmt, ...) fprintf(stderr, fmt "\n", ##__VA_ARGS__)
#define IL_LOGE(fmt, ...) fprintf(stderr, fmt "\n", ##__VA_ARGS__)
#endif
/* ── Static state ── */
static struct UASYNC* g_ua = NULL;
static struct UTUN_INSTANCE* g_inst = NULL;
static pthread_t g_thread;
static volatile int g_running = 0;
static volatile int g_stop = 0;
static char g_db_path[512];
static instance_lite_event_fn g_event_handler = NULL;
static char g_generated_pub[65];
static char g_generated_priv[65];
/* ── Generate X25519 key pair, hex-encode to out buffers ── */
static int generate_x25519_keys(char pub_hex[65], char priv_hex[65]) {
EVP_PKEY* pkey = NULL;
EVP_PKEY_CTX* ctx = EVP_PKEY_CTX_new_id(EVP_PKEY_X25519, NULL);
if (!ctx) return -1;
if (EVP_PKEY_keygen_init(ctx) <= 0 || EVP_PKEY_generate(ctx, &pkey) <= 0) {
EVP_PKEY_CTX_free(ctx);
return -1;
}
EVP_PKEY_CTX_free(ctx);
size_t pkLen = 32, skLen = 32;
uint8_t pk[32], sk[32];
EVP_PKEY_get_raw_public_key(pkey, pk, &pkLen);
EVP_PKEY_get_raw_private_key(pkey, sk, &skLen);
EVP_PKEY_free(pkey);
for (int i = 0; i < 32; i++) snprintf(pub_hex + i * 2, 3, "%02x", pk[i]);
for (int i = 0; i < 32; i++) snprintf(priv_hex + i * 2, 3, "%02x", sk[i]);
pub_hex[64] = '\0';
priv_hex[64] = '\0';
return 0;
}
static void save_keys_to_file(const char* pub, const char* priv) {
if (!g_db_path[0]) { IL_LOGE("save_keys_to_file: g_db_path is empty, keys not saved to disk"); return; }
char fname[512];
snprintf(fname, sizeof(fname), "%s/keys.conf", g_db_path);
FILE* f = fopen(fname, "w");
if (!f) { IL_LOGE("cannot write %s: %s", fname, strerror(errno)); return; }
fchmod(fileno(f), 0600);
fprintf(f, "public_key=%s\nprivate_key=%s\n", pub, priv);
fclose(f);
IL_LOGI("keys saved to %s", fname);
}
/* ── Ensure valid keys in config, generate if missing ── */
static void ensure_keys(struct utun_config* config) {
if (strlen(config->global.my_private_key_hex) != 64 ||
strlen(config->global.my_public_key_hex) != 64) {
IL_LOGI("config keys missing or invalid, generating new X25519 keypair");
if (generate_x25519_keys(g_generated_pub, g_generated_priv) == 0) {
memcpy(config->global.my_public_key_hex, g_generated_pub, 65);
memcpy(config->global.my_private_key_hex, g_generated_priv, 65);
IL_LOGI("new keys generated pub=%s", g_generated_pub);
save_keys_to_file(g_generated_pub, g_generated_priv);
} else {
IL_LOGE("key generation failed");
}
}
}
/* ── Helper: extract single config value by key ── */
static const char* cfg_get(const char* text, const char* key) {
size_t klen = strlen(key);
const char* p = text;
while (*p) {
if (strncmp(p, key, klen) == 0 && p[klen] == '=') {
return p + klen + 1;
}
while (*p && *p != '\n') p++;
if (*p == '\n') p++;
}
return NULL;
}
static void cfg_get_val(const char* text, const char* key, char* out, size_t out_sz) {
const char* v = cfg_get(text, key);
if (!v) { out[0] = '\0'; return; }
size_t i = 0;
while (*v && *v != '\n' && *v != '\r' && i < out_sz - 1)
out[i++] = *v++;
out[i] = '\0';
}
/* ── Chat event forward → Kotlin callback ── */
static void chat_event_forward(int type, const uint8_t* data, int len) {
if (g_event_handler) g_event_handler(type, data, len);
}
/* ── Thread function ── */
static void* instance_thread(void* arg) {
char* config_text = (char*)arg;
struct utun_config* config = parse_config_from_buf(config_text, strlen(config_text), "android");
u_free(config_text);
if (!config) { IL_LOGE("parse_config_from_buf failed"); return NULL; }
g_ua = uasync_create();
if (!g_ua) { IL_LOGE("uasync_create failed"); free_config(config); return NULL; }
if (config->global.log_udp_ip[0] && config->global.log_udp_port > 0) {
udp_log_set_target(config->global.log_udp_ip, config->global.log_udp_port);
uasync_set_timeout(g_ua, 2000, NULL, udp_trampoline, "udp_log_flush");
}
chat_event_set_handler(chat_event_forward);
ensure_keys(config);
g_inst = utun_instance_create_from_config(g_ua, config);
if (!g_inst) {
IL_LOGE("utun_instance_create_from_config failed");
uasync_destroy(g_ua, 0);
g_ua = NULL;
u_report_unfreed_blocks();
return NULL;
}
IL_LOGI("instance created, node_id=0x%016llx", (unsigned long long)g_inst->node_id);
/* Open shared SQLite DB */
if (g_db_path[0] && !g_inst->topo_sqlite_db) {
char db_file[512];
snprintf(db_file, sizeof(db_file), "%s/chats.db", g_db_path);
int rc = sqlite3_open_v2(db_file, &g_inst->topo_sqlite_db,
SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_FULLMUTEX, NULL);
if (rc == SQLITE_OK && g_inst->topo_sqlite_db) {
sqlite3_exec(g_inst->topo_sqlite_db, "PRAGMA journal_mode=WAL", NULL, NULL, NULL);
sqlite3_exec(g_inst->topo_sqlite_db, "PRAGMA foreign_keys=ON", NULL, NULL, NULL);
sqlite3_exec(g_inst->topo_sqlite_db, "PRAGMA synchronous=NORMAL", NULL, NULL, NULL);
sqlite3_exec(g_inst->topo_sqlite_db, "PRAGMA wal_autocheckpoint=10000", NULL, NULL, NULL);
topo_node_sqlite_init(g_inst->topo_sqlite_db);
IL_LOGI("SQLite opened %s", db_file);
} else {
IL_LOGE("SQLite open failed rc=%d", rc);
if (g_inst->topo_sqlite_db) { sqlite3_close(g_inst->topo_sqlite_db); g_inst->topo_sqlite_db = NULL; }
}
}
/* Full init: db_sync, chat_core, chat_sync, init_connections */
if (utun_instance_init(g_inst) != 0) {
IL_LOGE("utun_instance_init failed");
utun_instance_destroy(g_inst);
g_inst = NULL;
uasync_destroy(g_ua, 0);
g_ua = NULL;
u_report_unfreed_blocks();
return NULL;
}
/* Bind chat sync via etcp_router */
etcp_router_bind(g_inst, ETCP_RT_ID_CHAT_SYNC, NULL);
IL_LOGI("all init done, entering poll loop");
/* Notify GUI of current public key (initial generation or existing) */
if (strlen(config->global.my_public_key_hex) == 64) {
chat_event_post(CHAT_EVT_KEYS_GENERATED,
(const uint8_t*)config->global.my_public_key_hex, 64);
}
g_running = 1;
chat_event_post(CHAT_EVT_SERVICE_STARTED, NULL, 0);
while (!g_stop) {
uasync_poll(g_ua, 100);
}
IL_LOGI("poll loop exit, cleaning up");
if (g_inst) {
utun_instance_destroy(g_inst);
g_inst = NULL;
}
if (g_ua) {
uasync_destroy(g_ua, 0);
g_ua = NULL;
}
u_report_unfreed_blocks();
chat_event_post(CHAT_EVT_SERVICE_STOPPED, NULL, 0);
g_event_handler = NULL;
pthread_detach(pthread_self());
IL_LOGI("cleanup complete");
return NULL;
}
/* ── Public API ── */
int instance_lite_start(const char* config_text) {
if (!config_text) return -1;
if (g_inst) return 0;
debug_config_init();
debug_set_level(DEBUG_LEVEL_INFO);
debug_enable_function_name(0);
cfg_get_val(config_text, "db_path", g_db_path, sizeof(g_db_path));
char* config_copy = u_strdup(config_text);
if (!config_copy) return -1;
g_stop = 0;
int rc = pthread_create(&g_thread, NULL, instance_thread, config_copy);
if (rc != 0) {
u_free(config_copy);
IL_LOGE("pthread_create failed rc=%d", rc);
return -1;
}
IL_LOGI("started OK");
return 0;
}
void instance_lite_stop(void) {
if (!g_inst) return;
IL_LOGI("stopping...");
g_stop = 1;
if (g_ua) uasync_wakeup(g_ua);
for (int i = 0; i < 500 && g_inst != NULL; i++) usleep(10000);
if (g_inst) {
IL_LOGE("stop timeout, force cleanup");
g_inst = NULL;
g_ua = NULL;
}
g_running = 0;
}
static void restart_trampoline(void* arg) {
char* config_text = (char*)arg;
IL_LOGI("restart: begin");
chat_sync_destroy(g_inst);
chat_core_destroy(g_inst);
if (g_inst->topo_sqlite_db) {
sqlite3_close(g_inst->topo_sqlite_db);
g_inst->topo_sqlite_db = NULL;
}
struct utun_config* new_config = parse_config_from_buf(config_text, strlen(config_text), "android");
u_free(config_text);
if (!new_config) {
IL_LOGE("restart: parse_config failed");
g_running = 0;
return;
}
free_config(g_inst->config);
g_inst->config = new_config;
ensure_keys(new_config);
uint8_t pk_bin[32];
for (int i = 0; i < 32; i++) { unsigned int b; sscanf(new_config->global.my_public_key_hex + i * 2, "%2x", &b); pk_bin[i] = (uint8_t)b; }
g_inst->node_id = sc_derive_node_id_from_pubkey(pk_bin);
sc_init_local_keys(&g_inst->my_keys, new_config->global.my_public_key_hex, new_config->global.my_private_key_hex);
if (new_config->global.log_udp_ip[0] && new_config->global.log_udp_port > 0) {
udp_log_set_target(new_config->global.log_udp_ip, new_config->global.log_udp_port);
uasync_set_timeout(g_ua, 2000, NULL, udp_trampoline, "udp_log_flush");
} else {
udp_log_stop();
}
char db_file[512];
snprintf(db_file, sizeof(db_file), "%s/chats.db", g_db_path);
int rc = sqlite3_open_v2(db_file, &g_inst->topo_sqlite_db,
SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_FULLMUTEX, NULL);
if (rc == SQLITE_OK && g_inst->topo_sqlite_db) {
sqlite3_exec(g_inst->topo_sqlite_db, "PRAGMA journal_mode=WAL", NULL, NULL, NULL);
sqlite3_exec(g_inst->topo_sqlite_db, "PRAGMA foreign_keys=ON", NULL, NULL, NULL);
sqlite3_exec(g_inst->topo_sqlite_db, "PRAGMA synchronous=NORMAL", NULL, NULL, NULL);
topo_node_sqlite_init(g_inst->topo_sqlite_db);
IL_LOGI("restart: SQLite reopened %s", db_file);
} else {
IL_LOGE("restart: SQLite reopen failed rc=%d", rc);
g_running = 0;
return;
}
if (utun_instance_init(g_inst) != 0) {
IL_LOGE("restart: utun_instance_init failed");
g_running = 0;
return;
}
IL_LOGI("restart: done");
}
void instance_lite_restart(const char* new_config_text) {
if (!g_ua || !g_inst || !new_config_text) return;
IL_LOGI("restart: posting to uasync");
char* copy = u_strdup(new_config_text);
if (!copy) return;
uasync_post(g_ua, restart_trampoline, copy);
}
/* ── Health check ping ── */
static volatile int g_ping_id = 0;
static volatile int g_pong_id = 0;
static void ping_trampoline(void* arg) {
(void)arg;
g_pong_id = g_ping_id;
}
void instance_lite_ping(void) {
if (!g_ua || !g_inst) return;
g_ping_id++;
uasync_post(g_ua, ping_trampoline, NULL);
}
int instance_lite_is_responsive(void) {
return (g_pong_id == g_ping_id) ? 1 : 0;
}
int instance_lite_is_running(void) {
return g_inst != NULL ? 1 : 0;
}
struct UASYNC* instance_lite_get_uasync(void) {
return g_ua;
}
static void regenerate_trampoline(void* arg) {
(void)arg;
if (!g_inst || !g_inst->config) { IL_LOGE("regenerate_keys: instance not running"); return; }
struct utun_config* config = g_inst->config;
IL_LOGI("regenerating keys...");
config->global.my_public_key_hex[0] = '\0';
config->global.my_private_key_hex[0] = '\0';
ensure_keys(config);
if (g_generated_pub[0]) {
uint8_t pk_bin[32];
for (int i = 0; i < 32; i++) { unsigned int b; sscanf(g_generated_pub + i * 2, "%2x", &b); pk_bin[i] = (uint8_t)b; }
g_inst->node_id = sc_derive_node_id_from_pubkey(pk_bin);
sc_init_local_keys(&g_inst->my_keys, g_generated_pub, g_generated_priv);
IL_LOGI("keys regenerated, node_id=0x%016llx", (unsigned long long)g_inst->node_id);
chat_event_post(CHAT_EVT_KEYS_GENERATED, (const uint8_t*)g_generated_pub, 64);
}
}
void instance_lite_regenerate_keys(void) {
if (!g_ua || !g_inst) return;
uasync_post(g_ua, regenerate_trampoline, NULL);
}
void instance_lite_set_event_handler(instance_lite_event_fn handler) {
g_event_handler = handler;
if (g_running) chat_event_set_handler(chat_event_forward);
}