Line data    Source code

       1              : /* SPDX-License-Identifier: GPL-3.0-or-later */
       2              : /* Copyright 2026 Peter Csaszar */
       3              : 
       4              : /**
       5              :  * @file domain/write/read_history.c
       6              :  * @brief messages.readHistory + channels.readHistory (US-P5-04).
       7              :  */
       8              : 
       9              : #include "domain/write/read_history.h"
      10              : 
      11              : #include "tl_serial.h"
      12              : #include "tl_registry.h"
      13              : #include "mtproto_rpc.h"
      14              : #include "logger.h"
      15              : 
      16              : #include <string.h>
      17              : 
      18              : #define CRC_messages_readHistory  0x0e306d3au
      19              : #define CRC_channels_readHistory  0xcc104937u
      20              : #define CRC_messages_affectedMessages TL_messages_affectedMessages
      21              : #define CRC_inputChannel          0xf35aec28u
      22              : 
      23            1 : static int build_messages_request(const HistoryPeer *peer, int32_t max_id,
      24              :                                    uint8_t *buf, size_t cap, size_t *out_len) {
      25            1 :     TlWriter w; tl_writer_init(&w);
      26            1 :     tl_write_uint32(&w, CRC_messages_readHistory);
      27            1 :     switch (peer->kind) {
      28            1 :     case HISTORY_PEER_SELF:
      29            1 :         tl_write_uint32(&w, TL_inputPeerSelf);
      30            1 :         break;
      31            0 :     case HISTORY_PEER_USER:
      32            0 :         tl_write_uint32(&w, TL_inputPeerUser);
      33            0 :         tl_write_int64 (&w, peer->peer_id);
      34            0 :         tl_write_int64 (&w, peer->access_hash);
      35            0 :         break;
      36            0 :     case HISTORY_PEER_CHAT:
      37            0 :         tl_write_uint32(&w, TL_inputPeerChat);
      38            0 :         tl_write_int64 (&w, peer->peer_id);
      39            0 :         break;
      40            0 :     default:
      41            0 :         tl_writer_free(&w);
      42            0 :         return -1;
      43              :     }
      44            1 :     tl_write_int32(&w, max_id);
      45              : 
      46            1 :     int rc = -1;
      47            1 :     if (w.len <= cap) { memcpy(buf, w.data, w.len); *out_len = w.len; rc = 0; }
      48            1 :     tl_writer_free(&w);
      49            1 :     return rc;
      50              : }
      51              : 
      52            1 : static int build_channels_request(const HistoryPeer *peer, int32_t max_id,
      53              :                                    uint8_t *buf, size_t cap, size_t *out_len) {
      54            1 :     TlWriter w; tl_writer_init(&w);
      55            1 :     tl_write_uint32(&w, CRC_channels_readHistory);
      56            1 :     tl_write_uint32(&w, CRC_inputChannel);
      57            1 :     tl_write_int64 (&w, peer->peer_id);
      58            1 :     tl_write_int64 (&w, peer->access_hash);
      59            1 :     tl_write_int32 (&w, max_id);
      60              : 
      61            1 :     int rc = -1;
      62            1 :     if (w.len <= cap) { memcpy(buf, w.data, w.len); *out_len = w.len; rc = 0; }
      63            1 :     tl_writer_free(&w);
      64            1 :     return rc;
      65              : }
      66              : 
      67            2 : int domain_mark_read(const ApiConfig *cfg,
      68              :                       MtProtoSession *s, Transport *t,
      69              :                       const HistoryPeer *peer,
      70              :                       int32_t max_id,
      71              :                       RpcError *err) {
      72            2 :     if (!cfg || !s || !t || !peer) return -1;
      73              : 
      74            2 :     uint8_t query[64]; size_t qlen = 0;
      75            2 :     int is_channel = (peer->kind == HISTORY_PEER_CHANNEL);
      76              : 
      77            2 :     int bc = is_channel
      78            1 :            ? build_channels_request(peer, max_id, query, sizeof(query), &qlen)
      79            2 :            : build_messages_request(peer, max_id, query, sizeof(query), &qlen);
      80            2 :     if (bc != 0) return -1;
      81              : 
      82            2 :     uint8_t resp[512]; size_t resp_len = 0;
      83            2 :     if (api_call(cfg, s, t, query, qlen, resp, sizeof(resp), &resp_len) != 0) {
      84            0 :         logger_log(LOG_ERROR, "read_history: api_call failed");
      85            0 :         return -1;
      86              :     }
      87            2 :     if (resp_len < 4) return -1;
      88              : 
      89              :     uint32_t top;
      90            2 :     memcpy(&top, resp, 4);
      91            2 :     if (top == TL_rpc_error) {
      92            0 :         if (err) rpc_parse_error(resp, resp_len, err);
      93            0 :         return -1;
      94              :     }
      95            2 :     if (is_channel) {
      96            1 :         if (top == TL_boolTrue) return 0;
      97            0 :         if (top == TL_boolFalse) {
      98            0 :             logger_log(LOG_WARN, "read_history: channel returned boolFalse");
      99            0 :             return -1;
     100              :         }
     101            1 :     } else if (top == CRC_messages_affectedMessages) {
     102            1 :         return 0;
     103              :     }
     104            0 :     logger_log(LOG_WARN, "read_history: unexpected top 0x%08x", top);
     105            0 :     return 0;
     106              : }