diff options
Diffstat (limited to 'src/login/lclif.c')
| -rw-r--r-- | src/login/lclif.c | 566 |
1 files changed, 566 insertions, 0 deletions
diff --git a/src/login/lclif.c b/src/login/lclif.c new file mode 100644 index 000000000..9515c5940 --- /dev/null +++ b/src/login/lclif.c @@ -0,0 +1,566 @@ +/** + * This file is part of Hercules. + * http://herc.ws - http://github.com/HerculesWS/Hercules + * + * Copyright (C) 2016 Hercules Dev Team + * + * Hercules is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#define HERCULES_CORE + +#include "lclif.p.h" + +#include "login/ipban.h" +#include "login/login.h" +#include "login/loginlog.h" +#include "common/HPM.h" +#include "common/cbasetypes.h" +#include "common/db.h" +#include "common/md5calc.h" +#include "common/memmgr.h" +#include "common/mmo.h" +#include "common/nullpo.h" +#include "common/random.h" +#include "common/showmsg.h" +#include "common/socket.h" +#include "common/strlib.h" +#include "common/utils.h" + +/** @file + * Implementation of the login client interface. + */ + +struct lclif_interface lclif_s; +struct lclif_interface_private lclif_p; +struct lclif_interface_dbs lclif_dbs; +struct lclif_interface *lclif; + +/// @copydoc lclif_interface::connection_error() +void lclif_connection_error(int fd, uint8 error) +{ + struct packet_SC_NOTIFY_BAN *packet = NULL; + WFIFOHEAD(fd, sizeof(*packet)); + packet = WP2PTR(fd); + packet->packet_id = PACKET_ID_SC_NOTIFY_BAN; + packet->error_code = error; + WFIFOSET(fd, sizeof(*packet)); +} + +/// @copydoc lclif_interface_private::parse_CA_CONNECT_INFO_CHANGED() +enum parsefunc_rcode lclif_parse_CA_CONNECT_INFO_CHANGED(int fd, struct login_session_data *sd) __attribute__((nonnull (2))); +enum parsefunc_rcode lclif_parse_CA_CONNECT_INFO_CHANGED(int fd, struct login_session_data *sd) +{ + return PACKET_VALID; +} + +/// @copydoc lclif_interface_private::parse_CA_EXE_HASHCHECK() +enum parsefunc_rcode lclif_parse_CA_EXE_HASHCHECK(int fd, struct login_session_data *sd) __attribute__((nonnull (2))); +enum parsefunc_rcode lclif_parse_CA_EXE_HASHCHECK(int fd, struct login_session_data *sd) +{ + const struct packet_CA_EXE_HASHCHECK *packet = RP2PTR(fd); + sd->has_client_hash = 1; + memcpy(sd->client_hash, packet->hash_value, 16); + return PACKET_VALID; +} + +/// @copydoc lclif_interface_private::parse_CA_LOGIN() +enum parsefunc_rcode lclif_parse_CA_LOGIN(int fd, struct login_session_data *sd) __attribute__((nonnull (2))); +enum parsefunc_rcode lclif_parse_CA_LOGIN(int fd, struct login_session_data *sd) +{ + const struct packet_CA_LOGIN *packet = RP2PTR(fd); + + sd->version = packet->version; + sd->clienttype = packet->clienttype; + safestrncpy(sd->userid, packet->id, NAME_LENGTH); + safestrncpy(sd->passwd, packet->password, PASSWD_LEN); + + if (login->config->use_md5_passwds) + MD5_String(sd->passwd, sd->passwd); + sd->passwdenc = PWENC_NONE; + + login->client_login(fd, sd); + return PACKET_VALID; +} + +/// @copydoc lclif_interface_private::parse_CA_LOGIN2() +enum parsefunc_rcode lclif_parse_CA_LOGIN2(int fd, struct login_session_data *sd) __attribute__((nonnull (2))); +enum parsefunc_rcode lclif_parse_CA_LOGIN2(int fd, struct login_session_data *sd) +{ + const struct packet_CA_LOGIN2 *packet = RP2PTR(fd); + + sd->version = packet->version; + sd->clienttype = packet->clienttype; + safestrncpy(sd->userid, packet->id, NAME_LENGTH); + bin2hex(sd->passwd, packet->password_md5, 16); + sd->passwdenc = PASSWORDENC; + + login->client_login(fd, sd); + return PACKET_VALID; +} + +/// @copydoc lclif_interface_private::parse_CA_LOGIN3() +enum parsefunc_rcode lclif_parse_CA_LOGIN3(int fd, struct login_session_data *sd) __attribute__((nonnull (2))); +enum parsefunc_rcode lclif_parse_CA_LOGIN3(int fd, struct login_session_data *sd) +{ + const struct packet_CA_LOGIN3 *packet = RP2PTR(fd); + + sd->version = packet->version; + sd->clienttype = packet->clienttype; + /* unused */ + /* sd->clientinfo = packet->clientinfo; */ + safestrncpy(sd->userid, packet->id, NAME_LENGTH); + bin2hex(sd->passwd, packet->password_md5, 16); + sd->passwdenc = PASSWORDENC; + + login->client_login(fd, sd); + return PACKET_VALID; +} + +/// @copydoc lclif_interface_private::parse_CA_LOGIN4() +enum parsefunc_rcode lclif_parse_CA_LOGIN4(int fd, struct login_session_data *sd) __attribute__((nonnull (2))); +enum parsefunc_rcode lclif_parse_CA_LOGIN4(int fd, struct login_session_data *sd) +{ + const struct packet_CA_LOGIN4 *packet = RP2PTR(fd); + + sd->version = packet->version; + sd->clienttype = packet->clienttype; + /* unused */ + /* safestrncpy(sd->mac_address, packet->mac_address, sizeof(sd->mac_address)); */ + safestrncpy(sd->userid, packet->id, NAME_LENGTH); + bin2hex(sd->passwd, packet->password_md5, 16); + sd->passwdenc = PASSWORDENC; + + login->client_login(fd, sd); + return PACKET_VALID; +} + +/// @copydoc lclif_interface_private::parse_CA_LOGIN_PCBANG() +enum parsefunc_rcode lclif_parse_CA_LOGIN_PCBANG(int fd, struct login_session_data *sd) __attribute__((nonnull (2))); +enum parsefunc_rcode lclif_parse_CA_LOGIN_PCBANG(int fd, struct login_session_data *sd) +{ + const struct packet_CA_LOGIN_PCBANG *packet = RP2PTR(fd); + + sd->version = packet->version; + sd->clienttype = packet->clienttype; + /* unused */ + /* safestrncpy(sd->ip, packet->ip, sizeof(sd->ip)); */ + /* safestrncpy(sd->mac_address, packet->mac_address, sizeof(sd->mac_address)); */ + safestrncpy(sd->userid, packet->id, NAME_LENGTH); + safestrncpy(sd->passwd, packet->password, PASSWD_LEN); + + if (login->config->use_md5_passwds) + MD5_String(sd->passwd, sd->passwd); + sd->passwdenc = PWENC_NONE; + + login->client_login(fd, sd); + return PACKET_VALID; +} + +/// @copydoc lclif_interface_private::parse_CA_LOGIN_HAN() +enum parsefunc_rcode lclif_parse_CA_LOGIN_HAN(int fd, struct login_session_data *sd) __attribute__((nonnull (2))); +enum parsefunc_rcode lclif_parse_CA_LOGIN_HAN(int fd, struct login_session_data *sd) +{ + const struct packet_CA_LOGIN_HAN *packet = RP2PTR(fd); + + sd->version = packet->version; + sd->clienttype = packet->clienttype; + /* unused */ + /* safestrncpy(sd->ip, packet->ip, sizeof(sd->ip)); */ + /* safestrncpy(sd->mac_address, packet->mac_address, sizeof(sd->mac_address)); */ + /* sd->ishan = packet->is_han_game_user; */ + safestrncpy(sd->userid, packet->id, NAME_LENGTH); + safestrncpy(sd->passwd, packet->password, PASSWD_LEN); + + if (login->config->use_md5_passwds) + MD5_String(sd->passwd, sd->passwd); + sd->passwdenc = PWENC_NONE; + + login->client_login(fd, sd); + return PACKET_VALID; +} + +/// @copydoc lclif_interface_private::parse_CA_SSO_LOGIN_REQ() +enum parsefunc_rcode lclif_parse_CA_SSO_LOGIN_REQ(int fd, struct login_session_data *sd) __attribute__((nonnull (2))); +enum parsefunc_rcode lclif_parse_CA_SSO_LOGIN_REQ(int fd, struct login_session_data *sd) +{ + const struct packet_CA_SSO_LOGIN_REQ *packet = RP2PTR(fd); + int tokenlen = (int)RFIFOREST(fd) - (int)sizeof(*packet); + + if (tokenlen > PASSWD_LEN || tokenlen < 1) { + ShowError("packet_CA_SSO_LOGIN_REQ: Token length is not between allowed password length, kicking player ('%s')", packet->id); + sockt->eof(fd); + return PACKET_VALID; + } + + sd->clienttype = packet->clienttype; + sd->version = packet->version; + safestrncpy(sd->userid, packet->id, NAME_LENGTH); + safestrncpy(sd->passwd, packet->t1, min(tokenlen + 1, PASSWD_LEN)); // Variable-length field, don't copy more than necessary + + if (login->config->use_md5_passwds) + MD5_String(sd->passwd, sd->passwd); + sd->passwdenc = PWENC_NONE; + + login->client_login(fd, sd); + return PACKET_VALID; +} + +/// @copydoc lclif_interface_private::parse_CA_REQ_HASH() +enum parsefunc_rcode lclif_parse_CA_REQ_HASH(int fd, struct login_session_data *sd) __attribute__((nonnull (2))); +enum parsefunc_rcode lclif_parse_CA_REQ_HASH(int fd, struct login_session_data *sd) +{ + memset(sd->md5key, '\0', sizeof(sd->md5key)); + sd->md5keylen = (uint16)(12 + rnd() % 4); + MD5_Salt(sd->md5keylen, sd->md5key); + + lclif->coding_key(fd, sd); + return PACKET_VALID; +} + +/// @copydoc lclif_interface_private::parse_CA_CHARSERVERCONNECT() +enum parsefunc_rcode lclif_parse_CA_CHARSERVERCONNECT(int fd, struct login_session_data *sd) __attribute__((nonnull (2))); +enum parsefunc_rcode lclif_parse_CA_CHARSERVERCONNECT(int fd, struct login_session_data *sd) +{ + char ip[16]; + uint32 ipl = sockt->session[fd]->client_addr; + sockt->ip2str(ipl, ip); + + login->parse_request_connection(fd, sd, ip, ipl); + + return PACKET_STOPPARSE; +} + +/// @copydoc lclif_interface::server_list() +bool lclif_send_server_list(struct login_session_data *sd) +{ + int server_num = 0, i, n, length; + uint32 ip; + struct packet_AC_ACCEPT_LOGIN *packet = NULL; + + for (i = 0; i < ARRAYLENGTH(server); ++i) { + if (sockt->session_is_active(server[i].fd)) + server_num++; + } + if (server_num == 0) + return false; + + length = sizeof(*packet) + sizeof(packet->server_list[0]) * server_num; + ip = sockt->session[sd->fd]->client_addr; + + // Allocate the packet + WFIFOHEAD(sd->fd, length); + packet = WP2PTR(sd->fd); + + packet->packet_id = PACKET_ID_AC_ACCEPT_LOGIN; + packet->packet_len = length; + packet->auth_code = sd->login_id1; + packet->aid = sd->account_id; + packet->user_level = sd->login_id2; + packet->last_login_ip = 0; // Not used anymore + memset(packet->last_login_time, '\0', sizeof(packet->last_login_time)); // Not used anymore + packet->sex = sex_str2num(sd->sex); + for (i = 0, n = 0; i < ARRAYLENGTH(server); ++i) { + uint32 subnet_char_ip; + + if (!sockt->session_is_valid(server[i].fd)) + continue; + + subnet_char_ip = login->lan_subnet_check(ip); + packet->server_list[n].ip = htonl((subnet_char_ip) ? subnet_char_ip : server[i].ip); + packet->server_list[n].port = sockt->ntows(htons(server[i].port)); // [!] LE byte order here [!] + safestrncpy(packet->server_list[n].name, server[i].name, 20); + packet->server_list[n].usercount = server[i].users; + + if (server[i].type == CST_PAYING && sd->expiration_time > time(NULL)) + packet->server_list[n].property = CST_NORMAL; + else + packet->server_list[n].property = server[i].type; + + packet->server_list[n].state = server[i].new_; + ++n; + } + WFIFOSET(sd->fd, length); + + return true; +} + +/// @copydoc lclif_interface::auth_failed() +void lclif_send_auth_failed(int fd, time_t ban, uint32 error) +{ +#if PACKETVER >= 20120000 /* not sure when this started */ + struct packet_AC_REFUSE_LOGIN_R2 *packet = NULL; + int packet_id = PACKET_ID_AC_REFUSE_LOGIN_R2; +#else + struct packet_AC_REFUSE_LOGIN *packet = NULL; + int packet_id = PACKET_ID_AC_REFUSE_LOGIN; +#endif + WFIFOHEAD(fd, sizeof(*packet)); + packet = WP2PTR(fd); + packet->packet_id = packet_id; + packet->error_code = error; + if (error == 6) + timestamp2string(packet->block_date, sizeof(packet->block_date), ban, login->config->date_format); + else + memset(packet->block_date, '\0', sizeof(packet->block_date)); + WFIFOSET(fd, sizeof(*packet)); +} + +/// @copydoc lclif_interface::login_error() +void lclif_send_login_error(int fd, uint8 error) +{ + struct packet_AC_REFUSE_LOGIN *packet = NULL; + WFIFOHEAD(fd, sizeof(*packet)); + packet = WP2PTR(fd); + packet->packet_id = PACKET_ID_AC_REFUSE_LOGIN; + packet->error_code = error; + memset(packet->block_date, '\0', sizeof(packet->block_date)); + WFIFOSET(fd, sizeof(*packet)); +} + +/// @copydoc lclif_interface::coding_key() +void lclif_send_coding_key(int fd, struct login_session_data *sd) __attribute__((nonnull (2))); +void lclif_send_coding_key(int fd, struct login_session_data *sd) +{ + struct packet_AC_ACK_HASH *packet = NULL; + int16 size = sizeof(*packet) + sd->md5keylen; + + WFIFOHEAD(fd, size); + packet = WP2PTR(fd); + packet->packet_id = PACKET_ID_AC_ACK_HASH; + packet->packet_len = size; + memcpy(packet->secret, sd->md5key, sd->md5keylen); + WFIFOSET(fd, size); +} + +/// @copydoc lclif_interface::parse() +int lclif_parse(int fd) +{ + struct login_session_data *sd = NULL; + int i; + char ip[16]; + uint32 ipl = sockt->session[fd]->client_addr; + sockt->ip2str(ipl, ip); + + if (sockt->session[fd]->flag.eof) { + ShowInfo("Closed connection from '"CL_WHITE"%s"CL_RESET"'.\n", ip); + sockt->close(fd); + return 0; + } + + if ((sd = sockt->session[fd]->session_data) == NULL) { + // Perform ip-ban check + if (login->config->ipban && !sockt->trusted_ip_check(ipl) && ipban_check(ipl)) { + ShowStatus("Connection refused: IP isn't authorized (deny/allow, ip: %s).\n", ip); + login_log(ipl, "unknown", -3, "ip banned"); + lclif->login_error(fd, 3); // 3 = Rejected from Server + sockt->eof(fd); + return 0; + } + + // create a session for this new connection + CREATE(sockt->session[fd]->session_data, struct login_session_data, 1); + sd = sockt->session[fd]->session_data; + sd->fd = fd; + } + + for (i = 0; i < MAX_PROCESSED_PACKETS; ++i) { + enum parsefunc_rcode result; + int16 packet_id = RFIFOW(fd, 0); + int packet_len = (int)RFIFOREST(fd); + + if (packet_len < 2) + return 0; + + result = lclif->p->parse_sub(fd, sd); + + switch (result) { + case PACKET_SKIP: + continue; + case PACKET_INCOMPLETE: + case PACKET_STOPPARSE: + return 0; + case PACKET_UNKNOWN: + ShowWarning("lclif_parse: Received unsupported packet (packet 0x%04x, %d bytes received), disconnecting session #%d.\n", (unsigned int)packet_id, packet_len, fd); +#ifdef DUMP_INVALID_PACKET + ShowDump(RFIFOP(fd, 0), RFIFOREST(fd)); +#endif + sockt->eof(fd); + return 0; + case PACKET_INVALIDLENGTH: + ShowWarning("lclif_parse: Received packet 0x%04x specifies invalid packet_len (%d), disconnecting session #%d.\n", (unsigned int)packet_id, packet_len, fd); +#ifdef DUMP_INVALID_PACKET + ShowDump(RFIFOP(fd, 0), RFIFOREST(fd)); +#endif + sockt->eof(fd); + return 0; + } + } + return 0; +} + +/// @copydoc lclif_interface_private::parse_sub() +enum parsefunc_rcode lclif_parse_sub(int fd, struct login_session_data *sd) +{ + int packet_len = (int)RFIFOREST(fd); + int16 packet_id = RFIFOW(fd, 0); + const struct login_packet_db *lpd; + + if (VECTOR_LENGTH(HPM->packets[hpParse_Login]) > 0) { + int result = HPM->parse_packets(fd, packet_id, hpParse_Login); + if (result == 1) + return PACKET_VALID; + if (result == 2) + return PACKET_INCOMPLETE; // Packet not completed yet + } + + lpd = lclif->packet(packet_id); + + if (lpd == NULL) + return PACKET_UNKNOWN; + + if (lpd->len == 0) + return PACKET_UNKNOWN; + + if (lpd->len > 0 && lpd->pFunc == NULL) + return PACKET_UNKNOWN; //This Packet is defined for length purpose ? should never be sent from client ? + + if (lpd->len == -1) { + uint16 packet_var_len = 0; //Max Variable Packet length is signed int16 size + + if (packet_len < 4) + return PACKET_INCOMPLETE; //Packet incomplete + + packet_var_len = RFIFOW(fd, 2); + + if (packet_var_len < 4 || packet_var_len > SINT16_MAX) + return PACKET_INVALIDLENGTH; //Something is wrong, close connection. + + if (RFIFOREST(fd) < packet_var_len) + return PACKET_INCOMPLETE; //Packet incomplete again. + + return lclif->parse_packet(lpd, fd, sd); + } else if (lpd->len <= packet_len) { + return lclif->parse_packet(lpd, fd, sd); + } + + return PACKET_VALID; +} + +/// @copydoc lclif_interface::packet() +const struct login_packet_db *lclif_packet(int16 packet_id) +{ + if (packet_id == PACKET_ID_CA_CHARSERVERCONNECT) + return &lclif->p->dbs->packet_db[0]; + + if (packet_id > MAX_PACKET_DB || packet_id < MIN_PACKET_DB) + return NULL; + + return &lclif->p->dbs->packet_db[packet_id]; +} + +/// @copydoc lclif_interface::parse_packet() +enum parsefunc_rcode lclif_parse_packet(const struct login_packet_db *lpd, int fd, struct login_session_data *sd) +{ + int result; + result = (*lpd->pFunc)(fd, sd); + RFIFOSKIP(fd, (lpd->len == -1) ? RFIFOW(fd, 2) : lpd->len); + return result; +} + +/// @copydoc lclif_interface_private::packetdb_loaddb() +void packetdb_loaddb(void) +{ + int i; + struct packet { + int16 packet_id; + int16 packet_len; + LoginParseFunc **pFunc; + } packet[] = { +#define packet_def(name) { PACKET_ID_ ## name, sizeof(struct packet_ ## name), &lclif->p->parse_ ## name } +#define packet_def2(name, len) { PACKET_ID_ ## name, (len), &lclif->p->parse_ ## name } + packet_def(CA_CONNECT_INFO_CHANGED), + packet_def(CA_EXE_HASHCHECK), + packet_def(CA_LOGIN), + packet_def(CA_LOGIN2), + packet_def(CA_LOGIN3), + packet_def(CA_LOGIN4), + packet_def(CA_LOGIN_PCBANG), + packet_def(CA_LOGIN_HAN), + packet_def2(CA_SSO_LOGIN_REQ, -1), + packet_def(CA_REQ_HASH), +#undef packet_def +#undef packet_def2 + }; + int length = ARRAYLENGTH(packet); + + memset(lclif->p->dbs->packet_db, '\0', sizeof(lclif->p->dbs->packet_db)); + + for (i = 0; i < length; ++i) { + int16 packet_id = packet[i].packet_id; + Assert_retb(packet_id >= MIN_PACKET_DB && packet_id < MAX_PACKET_DB); + lclif->p->dbs->packet_db[packet_id].len = packet[i].packet_len; + lclif->p->dbs->packet_db[packet_id].pFunc = packet[i].pFunc; + } + + //Explict case, we will save character login packet in position 0 which is unused and not valid by normal + lclif->p->dbs->packet_db[0].len = sizeof(struct packet_CA_CHARSERVERCONNECT); + lclif->p->dbs->packet_db[0].pFunc = &lclif->p->parse_CA_CHARSERVERCONNECT; +} + +/// @copydoc lclif_interface::init() +void lclif_init(void) +{ + lclif->p->packetdb_loaddb(); +} + +/// @copydoc lclif_interface::final() +void lclif_final(void) +{ +} + +/// Interface base initialization. +void lclif_defaults(void) +{ + lclif = &lclif_s; + lclif->p = &lclif_p; + lclif->p->dbs = &lclif_dbs; + + lclif->init = lclif_init; + lclif->final = lclif_final; + + lclif->connection_error = lclif_connection_error; + lclif->server_list = lclif_send_server_list; + lclif->auth_failed = lclif_send_auth_failed; + lclif->login_error = lclif_send_login_error; + lclif->coding_key = lclif_send_coding_key; + + lclif->packet = lclif_packet; + lclif->parse_packet = lclif_parse_packet; + lclif->parse = lclif_parse; + + lclif->p->packetdb_loaddb = packetdb_loaddb; + lclif->p->parse_sub = lclif_parse_sub; + + lclif->p->parse_CA_CONNECT_INFO_CHANGED = lclif_parse_CA_CONNECT_INFO_CHANGED; + lclif->p->parse_CA_EXE_HASHCHECK = lclif_parse_CA_EXE_HASHCHECK; + lclif->p->parse_CA_LOGIN = lclif_parse_CA_LOGIN; + lclif->p->parse_CA_LOGIN2 = lclif_parse_CA_LOGIN2; + lclif->p->parse_CA_LOGIN3 = lclif_parse_CA_LOGIN3; + lclif->p->parse_CA_LOGIN4 = lclif_parse_CA_LOGIN4; + lclif->p->parse_CA_LOGIN_PCBANG = lclif_parse_CA_LOGIN_PCBANG; + lclif->p->parse_CA_LOGIN_HAN = lclif_parse_CA_LOGIN_HAN; + lclif->p->parse_CA_SSO_LOGIN_REQ = lclif_parse_CA_SSO_LOGIN_REQ; + lclif->p->parse_CA_REQ_HASH = lclif_parse_CA_REQ_HASH; + lclif->p->parse_CA_CHARSERVERCONNECT = lclif_parse_CA_CHARSERVERCONNECT; +} |