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utun2/tools/chatgui/transport/chat_core.c

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/*
* chat_core.c — центральный API чата в потоке uasync
*
* Все DB-операции — через своё sqlite3-соединение (тот же файл БД, WAL).
* Сетевые вызовы — напрямую в ETCP.
*/
#include "chat_core.h"
#include "db_sync.h"
#include "gui_bridge.h"
#include "topo_node_sqlite.h"
#include "member_sync.h"
#include "../../../src/utun_instance.h"
#include "../../../src/etcp_router.h"
#include "../../../src/etcp_api.h"
#include "../../../src/topo_group.h"
#include "../../../src/topo_node.h"
#include "../../../src/conn_mgr.h"
#include "../../../src/etcp.h"
#include "../../../src/etcp_connections.h"
#include "../../../src/secure_channel.h"
#include "../../../lib/u_async.h"
#include "../../../lib/ll_queue.h"
#include "../../../lib/mem.h"
#include "../../../lib/debug_config.h"
#include <sqlite3.h>
#include <openssl/sha.h>
#include <openssl/evp.h>
#include <string.h>
#include <stdio.h>
#define CC_ID "chat_core"
/* ─── глобальное состояние ─── */
static struct chat_core_ctx {
struct UTUN_INSTANCE* inst;
sqlite3* db;
uint64_t my_node_id;
/* db_sync instances per channel */
struct DB_SYNC_INSTANCE** si;
char** si_ch_id;
int si_count, si_capacity;
/* курсоры (макс 16) */
sqlite3_stmt* cursors[16];
uint32_t next_cursor_id;
uint8_t initialized;
} g_cc;
static struct DB_SYNC_INSTANCE* si_find(const char* ch_id);
static void si_register(struct DB_SYNC_INSTANCE* si, const char* ch_id);
static void on_db_sync_insert(struct DB_SYNC_INSTANCE* si, const char* data, size_t len, uint64_t author, void* arg);
/* ─── утилиты ─── */
static void sanitize_ch_id(const char* ch_id, char* out, size_t out_sz) {
size_t i = 0;
while (*ch_id && i < out_sz - 1) {
char c = *ch_id++;
if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')
|| (c >= '0' && c <= '9') || c == '_')
out[i++] = c;
else
out[i++] = '_';
}
out[i] = '\0';
}
static void msg_table_name(const char* ch_id, char* buf, size_t sz) {
char san[64]; sanitize_ch_id(ch_id, san, sizeof(san));
snprintf(buf, sz, "msg_%s", san);
}
static void peers_table_name(const char* ch_id, char* buf, size_t sz) {
char san[64]; sanitize_ch_id(ch_id, san, sizeof(san));
snprintf(buf, sz, "peers_%s", san);
}
static void compute_datahash(const uint8_t* data, size_t len, uint64_t* dh) {
uint8_t hash[32]; SHA256(data, len, hash);
memcpy(dh, hash, 8);
}
static void compute_chain_hash(const uint8_t* prev_chain, int64_t ts,
uint64_t dh, uint8_t* out) {
uint8_t buf[32 + 8 + 8];
memcpy(buf, prev_chain, 32);
memcpy(buf + 32, &ts, 8);
memcpy(buf + 40, &dh, 8);
SHA256(buf, 48, out);
}
static int get_last_chain_hash(const char* ch_id, uint8_t* out) {
char tbl[80]; msg_table_name(ch_id, tbl, sizeof(tbl));
char sql[256]; snprintf(sql, sizeof(sql),
"SELECT chain_hash FROM \"%s\" ORDER BY timestamp, datahash DESC LIMIT 1", tbl);
sqlite3_stmt* stmt = NULL;
if (sqlite3_prepare_v2(g_cc.db, sql, -1, &stmt, NULL) != SQLITE_OK) {
memset(out, 0, 32); return -1;
}
if (sqlite3_step(stmt) == SQLITE_ROW) {
const void* blob = sqlite3_column_blob(stmt, 0);
int len = sqlite3_column_bytes(stmt, 0);
if (blob && len == 32) memcpy(out, blob, 32);
else memset(out, 0, 32);
} else {
memset(out, 0, 32);
}
sqlite3_finalize(stmt);
return 0;
}
static int db_exec(const char* sql) {
char* err = NULL;
int rc = sqlite3_exec(g_cc.db, sql, NULL, NULL, &err);
if (rc != SQLITE_OK) {
DEBUG_ERROR(DEBUG_CATEGORY_CONNECTIVITY, "%s: sql error: %s", CC_ID, err);
sqlite3_free(err);
}
return rc;
}
/* ─── жизненный цикл ─── */
int chat_core_init(struct UTUN_INSTANCE* inst, const char* db_path) {
if (!inst || !db_path) return -1;
memset(&g_cc, 0, sizeof(g_cc));
int rc = sqlite3_open(db_path, &g_cc.db);
if (rc != SQLITE_OK) {
DEBUG_ERROR(DEBUG_CATEGORY_CONNECTIVITY, "%s: cannot open DB %s: %s",
CC_ID, db_path, sqlite3_errmsg(g_cc.db));
sqlite3_close(g_cc.db); g_cc.db = NULL; return -1;
}
sqlite3_exec(g_cc.db, "PRAGMA journal_mode=WAL", NULL, NULL, NULL);
sqlite3_exec(g_cc.db, "PRAGMA foreign_keys=ON", NULL, NULL, NULL);
g_cc.inst = inst;
g_cc.my_node_id = inst->node_id;
topo_node_sqlite_init(g_cc.db);
topo_groups_set_sqlite_db(inst->topo_groups, g_cc.db);
/* записать себя в nodes + local_identity с реальным node_id и именем */
{
const char* my_name = inst->name[0] ? inst->name : "Me";
sqlite3_stmt* st = NULL;
sqlite3_prepare_v2(g_cc.db,
"INSERT OR REPLACE INTO nodes(node_id, name, x25519_pubkey, ed25519_pubkey, online)"
" VALUES(?,?,?,?,1)", -1, &st, NULL);
if (st) {
sqlite3_bind_int64(st, 1, (sqlite3_int64)g_cc.my_node_id);
sqlite3_bind_text(st, 2, my_name, -1, SQLITE_STATIC);
sqlite3_bind_blob(st, 3, inst->my_keys.public_key, 32, SQLITE_STATIC);
sqlite3_bind_blob(st, 4, inst->my_ed25519_pubkey, 32, SQLITE_STATIC);
sqlite3_step(st); sqlite3_finalize(st);
}
st = NULL;
sqlite3_prepare_v2(g_cc.db,
"INSERT OR REPLACE INTO local_identity(id,node_id,name,x25519_pubkey,ed25519_pubkey)"
" VALUES(1,?,?,?,?)", -1, &st, NULL);
if (st) {
sqlite3_bind_int64(st, 1, (sqlite3_int64)g_cc.my_node_id);
sqlite3_bind_text(st, 2, my_name, -1, SQLITE_STATIC);
sqlite3_bind_blob(st, 3, inst->my_keys.public_key, 32, SQLITE_STATIC);
sqlite3_bind_blob(st, 4, inst->my_ed25519_pubkey, 32, SQLITE_STATIC);
sqlite3_step(st); sqlite3_finalize(st);
}
}
db_exec(
"CREATE TABLE IF NOT EXISTS local_identity ("
" id INTEGER PRIMARY KEY CHECK (id = 1),"
" node_id INTEGER NOT NULL UNIQUE,"
" name TEXT NOT NULL,"
" x25519_pubkey BLOB NOT NULL,"
" x25519_privkey BLOB,"
" ed25519_pubkey BLOB,"
" created_at INTEGER DEFAULT (unixepoch()),"
" updated_at INTEGER DEFAULT (unixepoch())"
");"
"CREATE TABLE IF NOT EXISTS accounts ("
" node_id INTEGER PRIMARY KEY REFERENCES nodes(node_id),"
" display_name TEXT NOT NULL,"
" avatar_color TEXT DEFAULT '#4A90E2',"
" avatar_letter TEXT NOT NULL,"
" is_contact INTEGER DEFAULT 1,"
" created_at INTEGER DEFAULT (unixepoch())"
");"
"CREATE TABLE IF NOT EXISTS ui_state ("
" key TEXT PRIMARY KEY,"
" value TEXT"
");"
);
g_cc.initialized = 1;
/* ensure infrastructure for all existing channels (survives restart) */
{
sqlite3_stmt* stmt = NULL;
if (sqlite3_prepare_v2(g_cc.db, "SELECT channel_id FROM channels ORDER BY created_at ASC",
-1, &stmt, NULL) == SQLITE_OK) {
while (sqlite3_step(stmt) == SQLITE_ROW) {
const char* ch = (const char*)sqlite3_column_text(stmt, 0);
if (ch && ch[0]) chat_core_ensure_channel_ready(ch);
}
sqlite3_finalize(stmt);
}
}
DEBUG_INFO(DEBUG_CATEGORY_CONNECTIVITY, "%s: initialized, db=%s node_id=0x%016llx",
CC_ID, db_path, (unsigned long long)g_cc.my_node_id);
{ uint8_t nid[8]; memcpy(nid, &g_cc.my_node_id, 8); gui_bridge_post(GUI_EVT_MY_NODE_ID, nid, 8); }
return 0;
}
void chat_core_destroy(struct UTUN_INSTANCE* inst) {
(void)inst;
if (!g_cc.initialized) return;
g_cc.initialized = 0;
for (int i = 0; i < 16; i++)
if (g_cc.cursors[i]) sqlite3_finalize(g_cc.cursors[i]);
if (g_cc.db) { sqlite3_close(g_cc.db); g_cc.db = NULL; }
g_cc.inst = NULL;
DEBUG_INFO(DEBUG_CATEGORY_CONNECTIVITY, "%s: destroyed", CC_ID);
}
void chat_core_set_my_node_id(uint64_t node_id) {
g_cc.my_node_id = node_id;
}
void chat_core_update_my_name(const char* name) {
if (!g_cc.initialized || !name) return;
sqlite3_stmt* st = NULL;
sqlite3_prepare_v2(g_cc.db, "UPDATE nodes SET name=? WHERE node_id=?", -1, &st, NULL);
if (st) {
sqlite3_bind_text(st, 1, name, -1, SQLITE_STATIC);
sqlite3_bind_int64(st, 2, (sqlite3_int64)g_cc.my_node_id);
sqlite3_step(st); sqlite3_finalize(st);
}
/* update instance name for NODEINFO */
snprintf(g_cc.inst->name, sizeof(g_cc.inst->name), "%s", name);
/* recompute join_sigs for all channels where I'm a member */
uint64_t myid = g_cc.my_node_id;
sqlite3_stmt* cs = NULL;
sqlite3_prepare_v2(g_cc.db, "SELECT channel_id FROM channels", -1, &cs, NULL);
if (cs) {
while (sqlite3_step(cs) == SQLITE_ROW) {
const char* ch = (const char*)sqlite3_column_text(cs, 0);
if (!ch) continue;
char tbl[80]; peers_table_name(ch, tbl, sizeof(tbl));
char buf[256]; snprintf(buf, sizeof(buf), "SELECT 1 FROM \"%s\" WHERE node_id=?", tbl);
sqlite3_stmt* ps = NULL;
if (sqlite3_prepare_v2(g_cc.db, buf, -1, &ps, NULL) == SQLITE_OK) {
sqlite3_bind_int64(ps, 1, (sqlite3_int64)myid);
if (sqlite3_step(ps) == SQLITE_ROW) {
uint8_t join_msg[256]; size_t mlen = 0;
mlen += snprintf((char*)join_msg + mlen, sizeof(join_msg) - mlen, "%s", ch) + 1;
memcpy(join_msg + mlen, &myid, 8); mlen += 8;
memcpy(join_msg + mlen, g_cc.inst->my_keys.public_key, 32); mlen += 32;
{ const char* nm = name[0] ? name : "";
size_t nl = strlen(nm); memcpy(join_msg + mlen, nm, nl); mlen += nl; join_msg[mlen++] = '\0'; }
uint8_t new_sig[64]; memset(new_sig, 0, 64);
EVP_PKEY* pkey = EVP_PKEY_new_raw_private_key(EVP_PKEY_ED25519, NULL,
g_cc.inst->my_ed25519_privkey, 32);
if (pkey) {
EVP_MD_CTX* mdctx = EVP_MD_CTX_new();
if (mdctx) {
if (EVP_DigestSignInit(mdctx, NULL, NULL, NULL, pkey) == 1)
EVP_DigestSign(mdctx, new_sig, &(size_t){64}, join_msg, mlen);
EVP_MD_CTX_free(mdctx);
}
EVP_PKEY_free(pkey);
}
topo_node_sqlite_member_put(g_cc.db, ch, myid, new_sig, NULL);
member_sync_put(g_cc.inst, ch, myid, g_cc.inst->my_keys.public_key,
g_cc.inst->my_ed25519_pubkey, new_sig, NULL, 0);
uint8_t evt[65]; uint8_t cl = (uint8_t)strlen(ch);
evt[0] = cl; memcpy(evt + 1, ch, cl);
gui_bridge_post(GUI_EVT_MEMBERS_CHANGED, evt, 1 + cl);
}
sqlite3_finalize(ps);
}
}
sqlite3_finalize(cs);
}
/* broadcast updated NODEINFO to connected peers */
struct TOPO_GROUP* grp = topo_groups_get_default(g_cc.inst->topo_groups);
if (grp) topo_group_update_my_nodeinfo(g_cc.inst, grp);
}
void chat_core_update_my_name_trampoline(void* arg) {
chat_core_update_my_name((const char*)arg);
u_free(arg);
}
/* ─── отправка сообщения (GUI → uasync) ─── */
void chat_core_submit_message(struct chat_msg_submit* req) {
if (!g_cc.initialized) { DEBUG_ERROR(DEBUG_CATEGORY_CONNECTIVITY, "%s: submit before init", CC_ID); return; }
if (!req) return;
struct DB_SYNC_INSTANCE* si = si_find(req->channel_id);
if (!si) { DEBUG_ERROR(DEBUG_CATEGORY_CONNECTIVITY, "%s: no db_sync instance for ch=%s", CC_ID, req->channel_id); return; }
/* Build JSON: {"n":<node_id>,"ch":"<ch_id>","ct":"<>","d":"<>"} */
char json[4096];
snprintf(json, sizeof(json),
"{\"n\":%llu,\"ch\":\"%s\",\"ct\":\"%s\",\"d\":\"%.*s\"}",
(unsigned long long)g_cc.my_node_id, req->channel_id,
req->content_type, (int)req->data_len, (const char*)req->data);
/* FIXME: JSON escaping for d (quotes/backslashes in data) */
/* For now, naive format; will break on special chars. TODO: use base64. */
int ret = db_sync_insert_signed(si, json, strlen(json), NULL, 0);
if (ret != 0) {
DEBUG_ERROR(DEBUG_CATEGORY_CONNECTIVITY, "%s: db_sync_insert_signed failed ret=%d", CC_ID, ret);
/* Insert directly to msg_ table as fallback (dual-write not triggered by callback) */
uint64_t dh; compute_datahash((const uint8_t*)req->data, req->data_len, &dh);
char tbl[80]; msg_table_name(req->channel_id, tbl, sizeof(tbl));
char sql[512]; snprintf(sql, sizeof(sql), "INSERT OR IGNORE INTO \"%s\" (node_id,content_type,data,timestamp,datahash,chain_hash,signature,is_outgoing,is_read) VALUES(?,?,?,?,?,?,?,1,1)", tbl);
sqlite3_stmt* st=NULL;
if (sqlite3_prepare_v2(g_cc.db,sql,-1,&st,NULL)==SQLITE_OK) {
sqlite3_bind_int64(st,1,(sqlite3_int64)g_cc.my_node_id);
sqlite3_bind_text(st,2,req->content_type,-1,SQLITE_STATIC);
sqlite3_bind_blob(st,3,req->data,(int)req->data_len,SQLITE_STATIC);
sqlite3_bind_int64(st,4,(sqlite3_int64)req->timestamp);
sqlite3_bind_int64(st,5,(sqlite3_int64)dh);
static const uint8_t ch32[32]={0}; sqlite3_bind_blob(st,6,ch32,32,SQLITE_STATIC);
static const uint8_t sig64[64]={0}; sqlite3_bind_blob(st,7,sig64,64,SQLITE_STATIC);
sqlite3_step(st); sqlite3_finalize(st);
}
/* notify GUI anyway */
uint8_t evt[65]; uint8_t cl=(uint8_t)strlen(req->channel_id); evt[0]=cl; memcpy(evt+1,req->channel_id,cl);
gui_bridge_post(GUI_EVT_MSG_RECEIVED, evt, 1+cl);
}
}
void chat_core_submit_trampoline(void* arg) { chat_core_submit_message((struct chat_msg_submit*)arg); u_free(arg); }
/* ─── DB-операции для chat_sync ─── */
uint32_t chat_core_count(const char* ch_id) {
if (!g_cc.initialized) return 0;
char tbl[80]; msg_table_name(ch_id, tbl, sizeof(tbl));
char sql[128]; snprintf(sql, sizeof(sql),
"SELECT COUNT(*) FROM \"%s\"", tbl);
sqlite3_stmt* stmt = NULL;
if (sqlite3_prepare_v2(g_cc.db, sql, -1, &stmt, NULL) != SQLITE_OK) return 0;
uint32_t cnt = 0;
if (sqlite3_step(stmt) == SQLITE_ROW)
cnt = (uint32_t)sqlite3_column_int64(stmt, 0);
sqlite3_finalize(stmt);
return cnt;
}
int chat_core_chain_hash_at(const char* ch_id, uint32_t pos, uint8_t* hash_out) {
if (!g_cc.initialized || !hash_out) return -1;
char tbl[80]; msg_table_name(ch_id, tbl, sizeof(tbl));
char sql[200]; snprintf(sql, sizeof(sql),
"SELECT chain_hash FROM \"%s\" ORDER BY timestamp, datahash ASC LIMIT 1 OFFSET ?",
tbl);
sqlite3_stmt* stmt = NULL;
if (sqlite3_prepare_v2(g_cc.db, sql, -1, &stmt, NULL) != SQLITE_OK) {
memset(hash_out, 0, 32); return -1;
}
sqlite3_bind_int64(stmt, 1, (sqlite3_int64)pos);
if (sqlite3_step(stmt) == SQLITE_ROW) {
const void* blob = sqlite3_column_blob(stmt, 0);
int len = sqlite3_column_bytes(stmt, 0);
if (blob && len == 32) memcpy(hash_out, blob, 32);
else memset(hash_out, 0, 32);
} else {
memset(hash_out, 0, 32);
}
sqlite3_finalize(stmt);
return 0;
}
int chat_core_insert_record(const char* ch_id, const uint8_t* rec, size_t len) {
if (!g_cc.initialized || !rec || len < 29) return -1;
const uint8_t* p = rec;
size_t rem = len;
int64_t ts; uint64_t dh, nid;
memcpy(&ts, p, 8); p += 8; rem -= 8;
memcpy(&dh, p, 8); p += 8; rem -= 8;
memcpy(&nid, p, 8); p += 8; rem -= 8;
if (rem < 1) return -1;
uint8_t ct_len = *p; p++; rem--;
if (rem < ct_len) return -1;
char ct_buf[64]; memcpy(ct_buf, p, ct_len); ct_buf[ct_len] = '\0';
p += ct_len; rem -= ct_len;
if (rem < 4) return -1;
uint32_t dlen; memcpy(&dlen, p, 4); p += 4; rem -= 4;
if (rem < dlen) return -1;
const uint8_t* data = p; p += dlen; rem -= dlen;
if (rem < 32) return -1;
uint8_t peer_ch[32]; memcpy(peer_ch, p, 32);
/* verify chain_hash */
uint8_t prev[32]; get_last_chain_hash(ch_id, prev);
uint8_t expected[32];
compute_chain_hash(prev, ts, dh, expected);
if (memcmp(expected, peer_ch, 32) != 0) {
DEBUG_ERROR(DEBUG_CATEGORY_CONNECTIVITY, "%s: chain_hash mismatch ch=%s ts=%lld dh=0x%016llx",
CC_ID, ch_id, (long long)ts, (unsigned long long)dh);
return -1;
}
char tbl[80]; msg_table_name(ch_id, tbl, sizeof(tbl));
char sql[256]; snprintf(sql, sizeof(sql),
"INSERT OR IGNORE INTO \"%s\""
" (node_id, content_type, data, timestamp, datahash, chain_hash,"
" signature, is_outgoing, is_read)"
" VALUES(?,?,?,?,?,?,?,0,1)", tbl);
sqlite3_stmt* stmt = NULL;
if (sqlite3_prepare_v2(g_cc.db, sql, -1, &stmt, NULL) != SQLITE_OK) return -1;
sqlite3_bind_int64(stmt, 1, (sqlite3_int64)nid);
sqlite3_bind_text(stmt, 2, ct_buf, ct_len, SQLITE_STATIC);
sqlite3_bind_blob(stmt, 3, data, (int)dlen, SQLITE_STATIC);
sqlite3_bind_int64(stmt, 4, ts);
sqlite3_bind_int64(stmt, 5, (sqlite3_int64)dh);
sqlite3_bind_blob(stmt, 6, peer_ch, 32, SQLITE_STATIC);
{
static const char zero64[64] = {0};
sqlite3_bind_blob(stmt, 7, zero64, 64, SQLITE_STATIC);
}
int rc = sqlite3_step(stmt);
sqlite3_finalize(stmt);
if (rc == SQLITE_DONE) {
DEBUG_INFO(DEBUG_CATEGORY_CONNECTIVITY, "%s: insert_record OK ch=%s ts=%lld dh=0x%016llx",
CC_ID, ch_id, (long long)ts, (unsigned long long)dh);
return 0;
}
if (rc == SQLITE_CONSTRAINT) return 1;
return -1;
}
uint32_t chat_core_cursor_open(const char* ch_id) {
if (!g_cc.initialized) return 0;
for (int i = 0; i < 16; i++) {
if (g_cc.cursors[i]) continue;
char tbl[80]; msg_table_name(ch_id, tbl, sizeof(tbl));
char sql[256]; snprintf(sql, sizeof(sql),
"SELECT timestamp, datahash, node_id, content_type, data, chain_hash"
" FROM \"%s\" ORDER BY timestamp, datahash ASC", tbl);
sqlite3_stmt* stmt = NULL;
if (sqlite3_prepare_v2(g_cc.db, sql, -1, &stmt, NULL) != SQLITE_OK) return 0;
uint32_t id = ++g_cc.next_cursor_id;
g_cc.cursors[i] = stmt;
return id;
}
return 0;
}
int chat_core_cursor_next(uint32_t cursor_id, uint8_t* buf, size_t buf_size,
size_t* out_len) {
if (!g_cc.initialized || !buf || !out_len) return -1;
for (int i = 0; i < 16; i++) {
if (!g_cc.cursors[i]) continue;
/* проверяем cursor_id = i+1 */
if ((uint32_t)(i + 1) != cursor_id) continue;
sqlite3_stmt* stmt = g_cc.cursors[i];
if (sqlite3_step(stmt) != SQLITE_ROW) { *out_len = 0; return 0; }
int64_t ts = sqlite3_column_int64(stmt, 0);
uint64_t dh = (uint64_t)sqlite3_column_int64(stmt, 1);
uint64_t nid= (uint64_t)sqlite3_column_int64(stmt, 2);
const char* ct = (const char*)sqlite3_column_text(stmt, 3);
int ct_len = sqlite3_column_bytes(stmt, 3);
const uint8_t* dptr = (const uint8_t*)sqlite3_column_blob(stmt, 4);
int dlen = sqlite3_column_bytes(stmt, 4);
const uint8_t* ch_ptr = (const uint8_t*)sqlite3_column_blob(stmt, 5);
int ch_len = sqlite3_column_bytes(stmt, 5);
size_t need = 8 + 8 + 8 + 1 + (size_t)ct_len + 4 + (size_t)dlen + 32;
if (need > buf_size) return -1;
uint8_t* out = buf;
memcpy(out, &ts, 8); out += 8;
memcpy(out, &dh, 8); out += 8;
memcpy(out, &nid, 8); out += 8;
*out++ = (uint8_t)ct_len;
if (ct_len) { memcpy(out, ct, (size_t)ct_len); out += ct_len; }
uint32_t dl32 = (uint32_t)dlen;
memcpy(out, &dl32, 4); out += 4;
if (dlen) { memcpy(out, dptr, (size_t)dlen); out += dlen; }
if (ch_ptr && ch_len >= 32) memcpy(out, ch_ptr, 32); else memset(out, 0, 32);
out += 32;
*out_len = (size_t)(out - buf);
return 0;
}
return -1;
}
void chat_core_cursor_close(uint32_t cursor_id) {
if (!g_cc.initialized) return;
for (int i = 0; i < 16; i++) {
if (g_cc.cursors[i] && (uint32_t)(i + 1) == cursor_id) {
sqlite3_finalize(g_cc.cursors[i]);
g_cc.cursors[i] = NULL;
return;
}
}
}
int chat_core_list_channels(uint8_t* buf, size_t buf_size, size_t* out_len) {
if (!g_cc.initialized || !buf || !out_len) return -1;
sqlite3_stmt* stmt = NULL;
if (sqlite3_prepare_v2(g_cc.db,
"SELECT channel_id FROM channels ORDER BY created_at ASC",
-1, &stmt, NULL) != SQLITE_OK) return -1;
uint8_t* out = buf;
uint8_t* start = out;
out += 2; /* placeholder for count */
uint16_t cnt = 0;
while (sqlite3_step(stmt) == SQLITE_ROW) {
const char* ch_id = (const char*)sqlite3_column_text(stmt, 0);
int ch_len = sqlite3_column_bytes(stmt, 0);
if (!ch_id || ch_len <= 0 || ch_len > 63) continue;
size_t need = (size_t)(out - buf) + 1 + (size_t)ch_len;
if (need > buf_size) break;
*out++ = (uint8_t)ch_len;
memcpy(out, ch_id, (size_t)ch_len); out += ch_len;
cnt++;
}
sqlite3_finalize(stmt);
memcpy(start, &cnt, 2);
*out_len = (size_t)(out - buf);
return 0;
}
int chat_core_list_peers(const char* ch_id, uint8_t* buf, size_t buf_size,
size_t* out_len) {
if (!g_cc.initialized || !buf || !out_len) return -1;
char tbl[80]; peers_table_name(ch_id, tbl, sizeof(tbl));
char sql[128]; snprintf(sql, sizeof(sql),
"SELECT node_id FROM \"%s\"", tbl);
sqlite3_stmt* stmt = NULL;
if (sqlite3_prepare_v2(g_cc.db, sql, -1, &stmt, NULL) != SQLITE_OK) {
uint16_t z = 0; memcpy(buf, &z, 2); *out_len = 2; return -1;
}
uint16_t cnt = 0;
uint8_t* out = buf + 2;
while (sqlite3_step(stmt) == SQLITE_ROW) {
if ((size_t)(out - buf) + 8 > buf_size) break;
uint64_t nid = (uint64_t)sqlite3_column_int64(stmt, 0);
memcpy(out, &nid, 8); out += 8; cnt++;
}
sqlite3_finalize(stmt);
memcpy(buf, &cnt, 2);
*out_len = (size_t)(out - buf);
return 0;
}
int chat_core_load_nodeinfo(uint64_t node_id, uint8_t* buf, size_t buf_size,
size_t* out_len) {
if (!g_cc.initialized || !buf || !out_len) return -1;
sqlite3_stmt* stmt = NULL;
if (sqlite3_prepare_v2(g_cc.db,
"SELECT x25519_pubkey, ed25519_pubkey FROM nodes WHERE node_id=?",
-1, &stmt, NULL) != SQLITE_OK) return -1;
sqlite3_bind_int64(stmt, 1, (sqlite3_int64)node_id);
if (sqlite3_step(stmt) != SQLITE_ROW) { sqlite3_finalize(stmt); return -1; }
const uint8_t* x25519 = (const uint8_t*)sqlite3_column_blob(stmt, 0);
int x25519_len = sqlite3_column_bytes(stmt, 0);
const uint8_t* ed25519 = (const uint8_t*)sqlite3_column_blob(stmt, 1);
int ed25519_len = sqlite3_column_bytes(stmt, 1);
uint8_t* out = buf;
if (x25519 && x25519_len == 32) memcpy(out, x25519, 32);
else memset(out, 0, 32);
out += 32;
if (ed25519 && ed25519_len == 32) memcpy(out, ed25519, 32);
else memset(out, 0, 32);
out += 32;
sqlite3_finalize(stmt);
/* адреса */
if (sqlite3_prepare_v2(g_cc.db,
"SELECT family, protocol, address, port, rtt FROM node_addresses WHERE node_id=?",
-1, &stmt, NULL) != SQLITE_OK) {
*out++ = 0; *out_len = (size_t)(out - buf); return 0;
}
sqlite3_bind_int64(stmt, 1, (sqlite3_int64)node_id);
uint8_t* cnt_pos = out; *out++ = 0;
uint8_t addr_cnt = 0;
while (sqlite3_step(stmt) == SQLITE_ROW && addr_cnt < 255) {
int family = sqlite3_column_int(stmt, 0);
int proto = sqlite3_column_int(stmt, 1);
const uint8_t* addr = (const uint8_t*)sqlite3_column_blob(stmt, 2);
int addr_len = sqlite3_column_bytes(stmt, 2);
uint16_t port = (uint16_t)sqlite3_column_int(stmt, 3);
int16_t rtt = (int16_t)sqlite3_column_int(stmt, 4);
if ((size_t)(out - buf) + 7 + (size_t)addr_len > buf_size) break;
*out++ = (uint8_t)family;
*out++ = (uint8_t)proto;
*out++ = (uint8_t)addr_len;
if (addr_len > 0) { memcpy(out, addr, (size_t)addr_len); out += addr_len; }
memcpy(out, &port, 2); out += 2;
memcpy(out, &rtt, 2); out += 2;
addr_cnt++;
}
*cnt_pos = addr_cnt;
sqlite3_finalize(stmt);
*out_len = (size_t)(out - buf);
return 0;
}
/* ─── подключение к пиру из invite-ссылки ─── */
static void connect_result_cb(int result, uint64_t node_id, void* arg) {
uint64_t channel_id = arg ? *(uint64_t*)arg : 0;
uint8_t data[20];
memcpy(data, &node_id, 8);
memcpy(data + 8, &result, 4);
memcpy(data + 12, &channel_id, 8);
gui_bridge_post(GUI_EVT_CONNECT_RESULT, data, 20);
}
#define CC_PARALLEL_CONNECT_TIMEOUT_MS 3000
struct cc_parallel_state {
struct UTUN_INSTANCE* inst;
int addr_count;
int pending_count;
int completed; /* 0=pending, 1=success, -1=fail-delivered */
uint64_t node_id;
uint64_t channel_id;
struct ETCP_CONN** conns;
void** timers;
};
struct cc_parallel_ctx {
struct cc_parallel_state* state;
int addr_index;
};
static void cc_parallel_cleanup(struct cc_parallel_state* st) {
if (!st) return;
u_free(st->conns);
u_free(st->timers);
u_free(st);
}
static void cc_parallel_ready_cb(struct ETCP_CONN* conn, void* arg) {
struct cc_parallel_ctx* pctx = (struct cc_parallel_ctx*)arg;
struct cc_parallel_state* st = pctx->state;
if (st->completed) { u_free(pctx); return; }
st->completed = 1;
uint8_t data[20];
memcpy(data, &st->node_id, 8);
int r = CONN_MGR_OK;
memcpy(data + 8, &r, 4);
memcpy(data + 12, &st->channel_id, 8);
gui_bridge_post(GUI_EVT_CONNECT_RESULT, data, 20);
DEBUG_INFO(DEBUG_CATEGORY_CONNECTIVITY, "%s: parallel connect SUCCESS idx=%d peer=0x%016llx",
CC_ID, pctx->addr_index, (unsigned long long)st->node_id);
for (int i = 0; i < st->addr_count; i++) {
if (st->timers[i]) { uasync_cancel_timeout(st->inst->ua, st->timers[i]); st->timers[i] = NULL; }
if (st->conns[i] && i != pctx->addr_index) { etcp_connection_close(st->conns[i]); st->conns[i] = NULL; }
}
u_free(pctx);
cc_parallel_cleanup(st);
}
static void cc_parallel_timeout_cb(void* arg) {
struct cc_parallel_ctx* pctx = (struct cc_parallel_ctx*)arg;
struct cc_parallel_state* st = pctx->state;
if (st->completed) { u_free(pctx); return; }
if (st->conns[pctx->addr_index]) { etcp_connection_close(st->conns[pctx->addr_index]); st->conns[pctx->addr_index] = NULL; }
st->timers[pctx->addr_index] = NULL;
st->pending_count--;
DEBUG_INFO(DEBUG_CATEGORY_CONNECTIVITY, "%s: parallel connect TIMEOUT idx=%d pending=%d/%d peer=0x%016llx",
CC_ID, pctx->addr_index, st->pending_count, st->addr_count, (unsigned long long)st->node_id);
if (st->pending_count <= 0 && !st->completed) {
st->completed = -1;
uint8_t data[20];
memcpy(data, &st->node_id, 8);
int r = CONN_MGR_ERR_TIMEOUT;
memcpy(data + 8, &r, 4);
memcpy(data + 12, &st->channel_id, 8);
gui_bridge_post(GUI_EVT_CONNECT_RESULT, data, 20);
cc_parallel_cleanup(st);
}
u_free(pctx);
}
void chat_core_connect_from_invite(struct chat_invite* inv) {
if (!g_cc.initialized || !g_cc.inst || !inv) return;
struct TOPO_GROUP* group = topo_groups_get_default(g_cc.inst->topo_groups);
if (!group || !g_cc.inst->conn_mgr) {
DEBUG_ERROR(DEBUG_CATEGORY_CONNECTIVITY, "%s: bgp/conn_mgr not available", CC_ID);
uint8_t err[12]; int r = -7;
memcpy(err, &inv->node_id, 8); memcpy(err + 8, &r, 4);
gui_bridge_post(GUI_EVT_CONNECT_RESULT, err, 12);
return;
}
uint64_t node_id = inv->node_id;
if (topo_node_find_by_id(group, node_id)) {
DEBUG_INFO(DEBUG_CATEGORY_CONNECTIVITY, "%s: node 0x%016llx already in BGP, connecting",
CC_ID, (unsigned long long)node_id);
conn_mgr_connect_node(g_cc.inst->conn_mgr, node_id, 30000,
connect_result_cb, &inv->channel_id);
return;
}
struct ll_entry* qe = queue_entry_new(sizeof(struct TOPO_NODEQ));
if (!qe) {
DEBUG_ERROR(DEBUG_CATEGORY_CONNECTIVITY, "%s: failed to alloc TOPO_NODEQ", CC_ID);
uint8_t err[12]; int r = -7;
memcpy(err, &node_id, 8); memcpy(err + 8, &r, 4);
gui_bridge_post(GUI_EVT_CONNECT_RESULT, err, 12);
return;
}
struct TOPO_NODEQ* nq = (struct TOPO_NODEQ*)qe;
memset((uint8_t*)nq + sizeof(struct ll_entry), 0, sizeof(*nq) - sizeof(struct ll_entry));
struct TOPO_NODE* ni = u_calloc(1, sizeof(struct TOPO_NODE));
if (!ni) { queue_entry_free(qe); return; }
ni->node_id = node_id;
ni->group_id = group->group_id;
ni->ver = 0;
memcpy(ni->public_key, inv->pubkey, SC_PUBKEY_SIZE);
memset(ni->ed25519_public_key, 0, SC_PUBKEY_SIZE);
ni->node_name = u_strdup("");
struct TOPO_ADDR4* addrs_head = NULL;
const uint8_t* src = inv->addrs_data;
for (int i = 0; i < inv->addr_count; i++) {
uint8_t family = *src++;
if (family == 4) {
struct TOPO_ADDR4* a4 = memory_pool_alloc(group->instance->topo_groups->v4_addr_pool);
if (!a4) continue;
memcpy(a4->addr, src, 4); src += 4;
a4->port = ((uint16_t)src[0] << 8) | src[1]; src += 2;
a4->type = TOPO_ADDR_REAL; a4->socket_id = 0; a4->protocol = TOPO_PROTO_UDP;
a4->next = addrs_head; addrs_head = a4;
} else {
src += 18; /* skip v6 */
}
}
ni->v4_addrs = addrs_head;
/* alien-узел: sock_meta с неизвестной конфигурацией цели */
struct TOPO_SOCKMETA4* sm = memory_pool_alloc(group->instance->topo_groups->v4_sock_meta_pool);
if (sm) { sm->id = 0; sm->config_type = CFG_SERVER_TYPE_UNKNOWN; sm->nat_type = NAT_TYPE_UNKNOWN; sm->next = NULL; ni->v4_sock_meta = sm; }
nq->node = ni; topo_node_ref(ni);
nq->hash_node_id = node_id; nq->alien = 0;
nq->dirty = 0; nq->last_ver = 0;
nq->conn_mgr_type = CONN_TYPE_NONE; nq->conn_mgr_intermediariy_count = 0;
memset(&nq->connectivity, 0, sizeof(nq->connectivity));
nq->best_socket = NULL;
queue_data_put_with_index(group->nodes, &nq->ll);
DEBUG_INFO(DEBUG_CATEGORY_CONNECTIVITY, "%s: created NODEINFO for 0x%016llx, %d addrs, parallel connect",
CC_ID, (unsigned long long)node_id, inv->addr_count);
/* count IPv4 addresses and collect them for parallel connect */
int v4_count = 0;
for (struct TOPO_ADDR4* a = addrs_head; a; a = a->next) v4_count++;
if (v4_count == 0) {
DEBUG_ERROR(DEBUG_CATEGORY_CONNECTIVITY, "%s: no IPv4 addresses in invite", CC_ID);
uint8_t err[20]; memcpy(err, &node_id, 8); int r = CONN_MGR_ERR_NO_ADDRESSES;
memcpy(err + 8, &r, 4); memset(err + 12, 0, 8);
gui_bridge_post(GUI_EVT_CONNECT_RESULT, err, 20);
return;
}
struct ETCP_SOCKET* best_socket = g_cc.inst->etcp_sockets;
while (best_socket && best_socket->local_addr.ss_family != AF_INET) best_socket = best_socket->next;
if (!best_socket) {
DEBUG_ERROR(DEBUG_CATEGORY_CONNECTIVITY, "%s: no AF_INET socket", CC_ID);
uint8_t err[20]; memcpy(err, &node_id, 8); int r = CONN_MGR_ERR_INTERNAL;
memcpy(err + 8, &r, 4); memset(err + 12, 0, 8);
gui_bridge_post(GUI_EVT_CONNECT_RESULT, err, 20);
return;
}
struct cc_parallel_state* pst = u_calloc(1, sizeof(struct cc_parallel_state));
if (!pst) {
uint8_t err[20]; memcpy(err, &node_id, 8); int r = CONN_MGR_ERR_INTERNAL;
memcpy(err + 8, &r, 4); memset(err + 12, 0, 8);
gui_bridge_post(GUI_EVT_CONNECT_RESULT, err, 20);
return;
}
pst->inst = g_cc.inst;
pst->addr_count = v4_count;
pst->pending_count = v4_count;
pst->completed = 0;
pst->node_id = node_id;
pst->channel_id = inv->channel_id;
pst->conns = u_calloc(v4_count, sizeof(struct ETCP_CONN*));
pst->timers = u_calloc(v4_count, sizeof(void*));
if (!pst->conns || !pst->timers) { cc_parallel_cleanup(pst); return; }
int idx = 0;
for (struct TOPO_ADDR4* a = addrs_head; a && idx < v4_count; a = a->next, idx++) {
struct sockaddr_in sin;
memset(&sin, 0, sizeof(sin)); sin.sin_family = AF_INET;
memcpy(&sin.sin_addr.s_addr, a->addr, 4); sin.sin_port = htons(a->port);
struct sockaddr_storage sa;
memset(&sa, 0, sizeof(sa)); memcpy(&sa, &sin, sizeof(sin));
struct ETCP_CONN* conn = etcp_connection_create(g_cc.inst, NULL);
if (!conn) {
DEBUG_ERROR(DEBUG_CATEGORY_CONNECTIVITY, "%s: etcp_connection_create failed idx=%d", CC_ID, idx);
pst->conns[idx] = NULL; pst->timers[idx] = NULL; pst->pending_count--; continue;
}
sc_init_ctx(&conn->crypto_ctx, &g_cc.inst->my_keys);
sc_set_peer_public_key(&conn->crypto_ctx, inv->pubkey, 0);
struct cc_parallel_ctx* pctx = u_calloc(1, sizeof(struct cc_parallel_ctx));
if (!pctx) { etcp_connection_close(conn); pst->conns[idx] = NULL; pst->timers[idx] = NULL; pst->pending_count--; continue; }
pctx->state = pst; pctx->addr_index = idx;
etcp_conn_set_ready_cbk(conn, cc_parallel_ready_cb, pctx);
if (!etcp_link_new(conn, best_socket, &sa, 0)) {
DEBUG_ERROR(DEBUG_CATEGORY_CONNECTIVITY, "%s: etcp_link_new failed idx=%d", CC_ID, idx);
u_free(pctx); etcp_connection_close(conn);
pst->conns[idx] = NULL; pst->timers[idx] = NULL; pst->pending_count--; continue;
}
pst->conns[idx] = conn;
pst->timers[idx] = uasync_set_timeout(g_cc.inst->ua, CC_PARALLEL_CONNECT_TIMEOUT_MS * 10,
pctx, cc_parallel_timeout_cb, "cc_parallel");
DEBUG_INFO(DEBUG_CATEGORY_CONNECTIVITY, "%s: parallel connect attempt %d/%d to %d.%d.%d.%d:%d",
CC_ID, idx + 1, v4_count, sin.sin_addr.s_addr & 0xFF, (sin.sin_addr.s_addr >> 8) & 0xFF,
(sin.sin_addr.s_addr >> 16) & 0xFF, (sin.sin_addr.s_addr >> 24) & 0xFF, a->port);
}
if (pst->pending_count <= 0 && !pst->completed) {
DEBUG_ERROR(DEBUG_CATEGORY_CONNECTIVITY, "%s: all %d parallel connects failed to start", CC_ID, v4_count);
uint8_t err[20]; memcpy(err, &node_id, 8); int r = CONN_MGR_ERR_UNREACHABLE;
memcpy(err + 8, &r, 4); memcpy(err + 12, &inv->channel_id, 8);
gui_bridge_post(GUI_EVT_CONNECT_RESULT, err, 20);
cc_parallel_cleanup(pst);
}
}
/* ─── подготовка инфраструктуры канала (msg-таблица + db_sync instance) ─── */
void chat_core_ensure_channel_ready(const char* ch_id) {
if (!g_cc.initialized || !ch_id || !ch_id[0]) return;
if (si_find(ch_id)) return;
char tbl_msg[80]; msg_table_name(ch_id, tbl_msg, sizeof(tbl_msg));
char sql[512];
snprintf(sql, sizeof(sql),
"CREATE TABLE IF NOT EXISTS \"%s\" ("
" id INTEGER PRIMARY KEY AUTOINCREMENT,"
" node_id INTEGER NOT NULL,"
" content_type TEXT NOT NULL,"
" data BLOB NOT NULL,"
" timestamp INTEGER NOT NULL,"
" datahash INTEGER NOT NULL,"
" chain_hash BLOB NOT NULL,"
" signature BLOB,"
" is_outgoing INTEGER DEFAULT 0,"
" is_read INTEGER DEFAULT 0,"
" sync_flags INTEGER DEFAULT 0,"
" UNIQUE(timestamp, datahash))", tbl_msg);
db_exec(sql);
snprintf(sql, sizeof(sql),
"CREATE INDEX IF NOT EXISTS \"idx_%s_ts_dh\" ON \"%s\"(timestamp, datahash)",
tbl_msg, tbl_msg);
db_exec(sql);
uint64_t ch_hash = 0;
{ const uint8_t* chd = (const uint8_t*)ch_id; size_t chl = strlen(ch_id); uint8_t sh[32]; SHA256(chd, chl, sh); memcpy(&ch_hash, sh, 8); }
struct DB_SYNC_INSTANCE* si = db_sync_instance_add(g_cc.inst, "chats", ch_hash);
if (si) {
si_register(si, ch_id);
db_sync_set_insert_cb(si, on_db_sync_insert, u_strdup(ch_id));
DEBUG_INFO(DEBUG_CATEGORY_CONNECTIVITY, "%s: channel ready ch=%s hash=0x%016llx",
CC_ID, ch_id, (unsigned long long)ch_hash);
} else {
DEBUG_ERROR(DEBUG_CATEGORY_CONNECTIVITY, "%s: db_sync_instance_add failed for ch=%s",
CC_ID, ch_id);
}
}
/* ─── создание канала ─── */
void chat_core_create_channel(struct chat_channel_create* req) {
if (!g_cc.initialized) {
DEBUG_ERROR(DEBUG_CATEGORY_CONNECTIVITY, "%s: create_channel NOT INITIALIZED ch=%s",
CC_ID, req ? req->channel_id : "(null)");
return;
}
if (!req) { DEBUG_ERROR(DEBUG_CATEGORY_CONNECTIVITY, "%s: create_channel req=NULL", CC_ID); return; }
DEBUG_INFO(DEBUG_CATEGORY_CONNECTIVITY, "%s: create_channel BEGIN ch=%s name=%s",
CC_ID, req->channel_id, req->name);
chat_core_ensure_channel_ready(req->channel_id);
/* записываем канал в БД */
int rc = topo_node_sqlite_channel_put(g_cc.db,
req->channel_id, req->name, req->is_dm, req->owner_node_id,
req->x25519_pubkey, req->x25519_privkey,
req->ed25519_pubkey, req->ed25519_privkey,
req->signature);
if (rc != 0) {
DEBUG_ERROR(DEBUG_CATEGORY_CONNECTIVITY, "%s: channel_put FAILED ch=%s rc=%d",
CC_ID, req->channel_id, rc);
} else {
DEBUG_INFO(DEBUG_CATEGORY_CONNECTIVITY, "%s: channel_put OK ch=%s name=%s owner=0x%016llx",
CC_ID, req->channel_id, req->name, (unsigned long long)req->owner_node_id);
uint8_t ch_id_len = (uint8_t)strlen(req->channel_id);
uint8_t data[65];
data[0] = ch_id_len;
memcpy(data + 1, req->channel_id, ch_id_len);
/* add self as first member BEFORE posting channel to GUI */
{
uint64_t myid = g_cc.inst->node_id;
uint8_t join_msg[256]; size_t mlen = 0;
mlen += snprintf((char*)join_msg + mlen, sizeof(join_msg) - mlen, "%s", req->channel_id) + 1;
memcpy(join_msg + mlen, &myid, 8); mlen += 8;
memcpy(join_msg + mlen, g_cc.inst->my_keys.public_key, 32); mlen += 32;
{ const char* nm = g_cc.inst->name[0] ? g_cc.inst->name : "";
size_t nl = strlen(nm); memcpy(join_msg + mlen, nm, nl); mlen += nl; join_msg[mlen++] = '\0'; }
uint8_t join_sig[64];
EVP_PKEY* pkey = EVP_PKEY_new_raw_private_key(EVP_PKEY_ED25519, NULL,
g_cc.inst->my_ed25519_privkey, 32);
if (pkey) {
EVP_MD_CTX* mdctx = EVP_MD_CTX_new();
if (mdctx) {
if (EVP_DigestSignInit(mdctx, NULL, NULL, NULL, pkey) == 1)
EVP_DigestSign(mdctx, join_sig, &(size_t){64}, join_msg, mlen);
else
memset(join_sig, 0, 64);
EVP_MD_CTX_free(mdctx);
}
EVP_PKEY_free(pkey);
} else {
memset(join_sig, 0, 64);
}
member_sync_put(g_cc.inst, req->channel_id, myid,
g_cc.inst->my_keys.public_key, g_cc.inst->my_ed25519_pubkey,
join_sig, NULL, 0);
}
/* notify GUI — members already in DB, channel will show with self as participant */
gui_bridge_post(GUI_EVT_CHANNEL_UPDATED, data, 1 + ch_id_len);
}
}
void chat_core_create_channel_trampoline(void* arg) {
DEBUG_INFO(DEBUG_CATEGORY_CONNECTIVITY, "chat_core: TRAMPOLINE invoked arg=%p", arg);
struct chat_channel_create* req = (struct chat_channel_create*)arg;
chat_core_create_channel(req);
u_free(req);
}
/* ─── db_sync helpers ─── */
static struct DB_SYNC_INSTANCE* si_find(const char* ch_id) {
for (int i=0; i<g_cc.si_count; i++) if (strcmp(g_cc.si_ch_id[i], ch_id)==0) return g_cc.si[i];
return NULL;
}
static void si_register(struct DB_SYNC_INSTANCE* si, const char* ch_id) {
if (g_cc.si_count>=g_cc.si_capacity) { int nc=g_cc.si_capacity?g_cc.si_capacity*2:8; g_cc.si=u_realloc(g_cc.si,nc*sizeof(void*)); g_cc.si_ch_id=u_realloc(g_cc.si_ch_id,nc*sizeof(char*)); g_cc.si_capacity=nc; }
g_cc.si[g_cc.si_count]=si; g_cc.si_ch_id[g_cc.si_count]=u_strdup(ch_id); g_cc.si_count++;
}
static void on_db_sync_insert(struct DB_SYNC_INSTANCE* si, const char* data, size_t len, uint64_t author, void* arg) {
const char* ch_id = (const char*)arg;
/* parse JSON: {"n":<uint64>,"ch":"<str>","ct":"<str>","d":"<str>"} */
const char* p = data; const char* end = data + len; uint64_t jn = 0;
{ /* "n" */
const char* n = strstr(p, "\"n\":"); if (!n) return;
n += 4; jn = strtoull(n, NULL, 0); p = n;
}
const char* jct = "text/plain"; size_t jct_len = 10;
{ /* "ct" */
const char* ct = strstr(p, "\"ct\":\""); if (ct) { ct += 6; const char* ce = strchr(ct, '"'); if (ce) { jct = ct; jct_len = (size_t)(ce - ct); p = ce; } }
}
const char* jd_start = NULL; size_t jd_len = 0;
{ /* "d" */
const char* d = strstr(p, "\"d\":\""); if (d) { d += 5; const char* de = d; while (de < end) { if (*de == '"' && (de == d || *(de - 1) != '\\')) break; de++; } if (de < end) { jd_start = d; jd_len = (size_t)(de - d); } }
}
if (!jd_start) return;
uint64_t dh; compute_datahash((const uint8_t*)jd_start, jd_len, &dh);
uint64_t ts = get_time_us();
char tbl[80]; msg_table_name(ch_id, tbl, sizeof(tbl));
uint8_t prev_ch[32]; get_last_chain_hash(ch_id, prev_ch);
uint8_t chain_h[32]; compute_chain_hash(prev_ch, (int64_t)ts, dh, chain_h);
char sql[512]; snprintf(sql, sizeof(sql),
"INSERT OR IGNORE INTO \"%s\" (node_id,content_type,data,timestamp,datahash,chain_hash,signature,is_outgoing,is_read,sync_flags)"
" VALUES(?,?,?,?,?,?,?,?,?,?)", tbl);
sqlite3_stmt* st=NULL;
if (sqlite3_prepare_v2(g_cc.db,sql,-1,&st,NULL)!=SQLITE_OK) return;
sqlite3_bind_int64(st,1,(sqlite3_int64)jn);
sqlite3_bind_text(st,2,jct,(int)jct_len,SQLITE_STATIC);
sqlite3_bind_blob(st,3,jd_start,(int)jd_len,SQLITE_STATIC);
sqlite3_bind_int64(st,4,(sqlite3_int64)ts);
sqlite3_bind_int64(st,5,(sqlite3_int64)dh);
sqlite3_bind_blob(st,6,chain_h,32,SQLITE_STATIC);
{ static const uint8_t z64[64]={0}; sqlite3_bind_blob(st,7,z64,64,SQLITE_STATIC); }
sqlite3_bind_int(st,8,(uint64_t)jn==g_cc.my_node_id?1:0);
sqlite3_bind_int(st,9,1); sqlite3_bind_int(st,10,0);
int rc=sqlite3_step(st); sqlite3_finalize(st);
if (rc==SQLITE_DONE) {
uint8_t evt[65]; uint8_t cl=(uint8_t)strlen(ch_id); evt[0]=cl; memcpy(evt+1,ch_id,cl);
gui_bridge_post(GUI_EVT_MSG_RECEIVED, evt, 1+cl);
}
}
/* ─── stubs for chat_sync compatibility (db_sync handles this now) ─── */
void chat_core_mark_sent(const char* ch_id, uint64_t ts, uint64_t dh, uint64_t peer_id) { (void)ch_id; (void)ts; (void)dh; (void)peer_id; }
void chat_core_ttl_delete(const char* ch_id, uint64_t node_id, uint64_t cutoff_us) { (void)ch_id; (void)node_id; (void)cutoff_us; }