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-rw-r--r--src/login/lclif.c750
1 files changed, 750 insertions, 0 deletions
diff --git a/src/login/lclif.c b/src/login/lclif.c
new file mode 100644
index 000000000..203b0cbbc
--- /dev/null
+++ b/src/login/lclif.c
@@ -0,0 +1,750 @@
+/**
+ * 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.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"
+
+struct lclif_interface lclif_s;
+struct lclif_interface *lclif;
+
+/* Definitions and macros */
+/// Maximum amount of packets processed at once from the same client
+#define MAX_PROCESSED_PACKETS (3)
+
+// Packet DB
+#define MIN_PACKET_DB 0x0064
+#define MAX_PACKET_DB 0x08ff
+
+/* Enums */
+
+/// Packet IDs
+enum login_packet_id {
+ // CA (Client to Login)
+ PACKET_ID_CA_LOGIN = 0x0064,
+ PACKET_ID_CA_LOGIN2 = 0x01dd,
+ PACKET_ID_CA_LOGIN3 = 0x01fa,
+ PACKET_ID_CA_CONNECT_INFO_CHANGED = 0x0200,
+ PACKET_ID_CA_EXE_HASHCHECK = 0x0204,
+ PACKET_ID_CA_LOGIN_PCBANG = 0x0277,
+ PACKET_ID_CA_LOGIN4 = 0x027c,
+ PACKET_ID_CA_LOGIN_HAN = 0x02b0,
+ PACKET_ID_CA_SSO_LOGIN_REQ = 0x0825,
+ PACKET_ID_CA_REQ_HASH = 0x01db,
+ PACKET_ID_CA_CHARSERVERCONNECT = 0x2710, // Custom Hercules Packet
+ //PACKET_ID_CA_SSO_LOGIN_REQa = 0x825a, /* unused */
+
+ // AC (Login to Client)
+ PACKET_ID_AC_ACCEPT_LOGIN = 0x0069,
+ PACKET_ID_AC_REFUSE_LOGIN = 0x006a,
+ PACKET_ID_SC_NOTIFY_BAN = 0x0081,
+ PACKET_ID_AC_ACK_HASH = 0x01dc,
+ PACKET_ID_AC_REFUSE_LOGIN_R2 = 0x083e,
+};
+
+/* Packets Structs */
+#if !defined(sun) && (!defined(__NETBSD__) || __NetBSD_Version__ >= 600000000) // NetBSD 5 and Solaris don't like pragma pack but accept the packed attribute
+#pragma pack(push, 1)
+#endif // not NetBSD < 6 / Solaris
+
+/**
+ * Packet structure for CA_LOGIN.
+ */
+struct packet_CA_LOGIN {
+ int16 packet_id; ///< Packet ID (#PACKET_ID_CA_LOGIN)
+ uint32 version; ///< Client Version
+ char id[24]; ///< Username
+ char password[24]; ///< Password
+ uint8 clienttype; ///< Client Type
+} __attribute__((packed));
+
+/**
+ * Packet structure for CA_LOGIN2.
+ */
+struct packet_CA_LOGIN2 {
+ int16 packet_id; ///< Packet ID (#PACKET_ID_CA_LOGIN2)
+ uint32 version; ///< Client Version
+ char id[24]; ///< Username
+ uint8 password_md5[16]; ///< Password hash
+ uint8 clienttype; ///< Client Type
+} __attribute__((packed));
+
+/**
+ * Packet structure for CA_LOGIN3.
+ */
+struct packet_CA_LOGIN3 {
+ int16 packet_id; ///< Packet ID (#PACKET_ID_CA_LOGIN3)
+ uint32 version; ///< Client Version
+ char id[24]; ///< Username
+ uint8 password_md5[16]; ///< Password hash
+ uint8 clienttype; ///< Client Type
+ uint8 clientinfo; ///< Index of the connection in the clientinfo file (+10 if the command-line contains "pc")
+} __attribute__((packed));
+
+/**
+ * Packet structure for CA_LOGIN4.
+ */
+struct packet_CA_LOGIN4 {
+ int16 packet_id; ///< Packet ID (#PACKET_ID_CA_LOGIN4)
+ uint32 version; ///< Client Version
+ char id[24]; ///< Username
+ uint8 password_md5[16]; ///< Password hash
+ uint8 clienttype; ///< Client Type
+ char mac_address[13]; ///< MAC Address
+} __attribute__((packed));
+
+/**
+ * Packet structure for CA_LOGIN_PCBANG.
+ */
+struct packet_CA_LOGIN_PCBANG {
+ int16 packet_id; ///< Packet ID (#PACKET_ID_CA_LOGIN_PCBANG)
+ uint32 version; ///< Client Version
+ char id[24]; ///< Username
+ char password[24]; ///< Password
+ uint8 clienttype; ///< Client Type
+ char ip[16]; ///< IP Address
+ char mac_address[13]; ///< MAC Address
+} __attribute__((packed));
+
+/**
+ * Packet structure for CA_LOGIN_HAN.
+ */
+struct packet_CA_LOGIN_HAN {
+ int16 packet_id; ///< Packet ID (#PACKET_ID_CA_LOGIN_HAN)
+ uint32 version; ///< Client Version
+ char id[24]; ///< Username
+ char password[24]; ///< Password
+ uint8 clienttype; ///< Client Type
+ char ip[16]; ///< IP Address
+ char mac_address[13]; ///< MAC Address
+ uint8 is_han_game_user; ///< 'isGravityID'
+} __attribute__((packed));
+
+/**
+ * Packet structure for CA_SSO_LOGIN_REQ.
+ *
+ * Variable-length packet.
+ */
+struct packet_CA_SSO_LOGIN_REQ {
+ int16 packet_id; ///< Packet ID (#PACKET_ID_CA_SSO_LOGIN_REQ)
+ int16 packet_len; ///< Length (variable length)
+ uint32 version; ///< Client Version
+ uint8 clienttype; ///< Client Type
+ char id[24]; ///< Username
+ char password[27]; ///< Password
+ int8 mac_address[17]; ///< MAC Address
+ char ip[15]; ///< IP Address
+ char t1[]; ///< SSO Login Token (variable length)
+} __attribute__((packed));
+
+#if 0 // Unused
+struct packet_CA_SSO_LOGIN_REQa {
+ int16 packet_id;
+ int16 packet_len;
+ uint32 version;
+ uint8 clienttype;
+ char id[24];
+ int8 mac_address[17];
+ char ip[15];
+ char t1[];
+} __attribute__((packed));
+#endif // unused
+
+/**
+ * Packet structure for CA_CONNECT_INFO_CHANGED.
+ *
+ * New alive packet. Used to verify if client is always alive.
+ */
+struct packet_CA_CONNECT_INFO_CHANGED {
+ int16 packet_id; ///< Packet ID (#PACKET_ID_CA_CONNECT_INFO_CHANGED)
+ char id[24]; ///< account.userid
+} __attribute__((packed));
+
+/**
+ * Packet structure for CA_EXE_HASHCHECK.
+ *
+ * (kRO 2004-05-31aSakexe langtype 0 and 6)
+ */
+struct packet_CA_EXE_HASHCHECK {
+ int16 packet_id; ///< Packet ID (#PACKET_ID_CA_EXE_HASHCHECK)
+ uint8 hash_value[16]; ///< Client MD5 hash
+} __attribute__((packed));
+
+/**
+ * Packet structure for CA_REQ_HASH.
+ */
+struct packet_CA_REQ_HASH {
+ int16 packet_id; ///< Packet ID (#PACKET_ID_CA_REQ_HASH)
+} __attribute__((packed));
+
+struct packet_CA_CHARSERVERCONNECT {
+ int16 packet_id;
+ char userid[24];
+ char password[24];
+ int32 unknown;
+ int32 ip;
+ int16 port;
+ char name[20];
+ int16 unknown2;
+ int16 type;
+ int16 new;
+} __attribute__((packed));
+
+struct packet_SC_NOTIFY_BAN {
+ int16 packet_id;
+ uint8 error_code;
+} __attribute__((packed));
+
+struct packet_AC_REFUSE_LOGIN {
+ int16 packet_id;
+ uint8 error_code;
+ char block_date[20];
+} __attribute__((packed));
+
+struct packet_AC_REFUSE_LOGIN_R2 {
+ int16 packet_id;
+ uint32 error_code;
+ char block_date[20];
+} __attribute__((packed));
+
+struct packet_AC_ACCEPT_LOGIN {
+ int16 packet_id;
+ int16 packet_len;
+ int32 auth_code;
+ uint32 aid;
+ uint32 user_level;
+ uint32 last_login_ip;
+ char last_login_time[26];
+ uint8 sex;
+ struct {
+ uint32 ip;
+ int16 port;
+ char name[20];
+ uint16 usercount;
+ uint16 state;
+ uint16 property;
+ } server_list[];
+} __attribute__((packed));
+
+struct packet_AC_ACK_HASH {
+ int16 packet_id;
+ int16 packet_len;
+ uint8 secret[];
+} __attribute__((packed));
+
+#if !defined(sun) && (!defined(__NETBSD__) || __NetBSD_Version__ >= 600000000) // NetBSD 5 and Solaris don't like pragma pack but accept the packed attribute
+#pragma pack(pop)
+#endif // not NetBSD < 6 / Solaris
+
+struct login_packet_db packet_db[MAX_PACKET_DB + 1];
+
+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));
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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));
+}
+
+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));
+}
+
+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);
+}
+
+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->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;
+}
+
+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;
+}
+
+const struct login_packet_db *lclif_packet(int16 packet_id)
+{
+ if (packet_id == PACKET_ID_CA_CHARSERVERCONNECT)
+ return &packet_db[0];
+
+ if (packet_id > MAX_PACKET_DB || packet_id < MIN_PACKET_DB)
+ return NULL;
+
+ return &packet_db[packet_id];
+}
+
+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;
+}
+
+void packetdb_loaddb(void)
+{
+ int i;
+ struct packet {
+ int16 packet_id;
+ int16 packet_len;
+ int (*pFunc)(int, struct login_session_data *);
+ } packet[] = {
+#define packet_def(name) { PACKET_ID_ ## name, sizeof(struct packet_ ## name), lclif_parse_ ## name }
+#define packet_def2(name, len) { PACKET_ID_ ## name, (len), lclif_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(packet_db, '\0', sizeof(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);
+ packet_db[packet_id].len = packet[i].packet_len;
+ 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
+ packet_db[0].len = sizeof(struct packet_CA_CHARSERVERCONNECT);
+ packet_db[0].pFunc = lclif_parse_CA_CHARSERVERCONNECT;
+}
+
+void lclif_init(void)
+{
+ packetdb_loaddb();
+}
+
+void lclif_final(void)
+{
+}
+
+void lclif_defaults(void)
+{
+ lclif = &lclif_s;
+
+ 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->parse_sub = lclif_parse_sub;
+}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-02 07:01:29 +0000