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tee.c
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tee.c
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/*
* qstat
* by Steve Jankowski
*
* Teeworlds protocol
* Thanks to Emiliano Leporati for the first Teeworlds patch (2008)
* Thanks to Thomas Debesse for the rewrite <[email protected]> (2014)
* Thanks to Steven Hartland for some parts and help <[email protected]>
*
* Licensed under the Artistic License, see LICENSE.txt for license terms
*/
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "debug.h"
#include "qstat.h"
#include "packet_manip.h"
/* See "scripts/tw_api.py" from Teeworlds project */
/* query server */
int len_teeserver_request_packet = 15;
char teeserver_request_packet[15] = { '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', 'g', 'i', 'e', '\x00', '\x00' };
/* server response */
int len_teeserver_info_headerprefix = 13;
char teeserver_info_headerprefix[13] = { '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', 'i', 'n', 'f' };
/*
* To request, we will try 3 request packet, only one character and the size change, so no need to declare 3 strings
*
* char teeserver_request_packet[14] = { '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', 'g', 'i', 'e', 'f' };
* char teeserver_request_packe2[15] = { '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', 'g', 'i', 'e', '2', '\x00' };
* char teeserver_request_packe3[15] = { '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', 'g', 'i', 'e', '3', '\x00' };
*
* To analyze response, we will compare the same string without the last character, then the last character, so no need to declare 3 strings
*
* char teeserver_info_header[14] = { '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', 'i', 'n', 'f', 'o' };
* char teeserver_inf2_header[14] = { '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', 'i', 'n', 'f', '2' };
* char teeserver_inf3_header[14] = { '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', 'i', 'n', 'f', '3' };
*/
/*
* For information, Tee packet samples per header, explained
*
* Header "info": \xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', 'i', 'n', 'f', 'o'
* Answer sample: '\xff\xff\xff\xff\xff\xff\xff\xff\xff\xffinfo0.5.1\x00.:{TeeKnight|Catch16}:. Catch16 hosted by TeeKnight.de\x00lightcatch\x00Catch16\x000\x00-1\x000\x0016\x00'
* Answer format: (*char)header,(*char)version,(*char)name,(*char)map,(*char)gametype,(int)flags,(int)progression,(int)num_players,(int)max_players,*players[]
*
* Header "inf2": \xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', 'i', 'n', 'f', '2'
* Answer sample: '\xff\xff\xff\xff\xff\xff\xff\xff\xff\xffinf20\x000.5.1\x00.:{TeeKnight|Catch16}:. Catch16 hosted by TeeKnight.de\x00lightcatch\x00Catch16\x000\x00-1\x000\x0016\x00'
* Answer format: (*char)header,(*char)token,(*char)version),(*char)name,(*char)map,(*char)gametype,(int)flags,(int)progression,(int)num_players,(int)max_players,*players[]
*
* Header "inf3": \xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', 'i', 'n', 'f', '3'
* Answer sample: '\xff\xff\xff\xff\xff\xff\xff\xff\xff\xffinf30\x000.6.1\x00[Bigstream.ru] CTF5 only\x00ctf5\x00CTF\x000\x000\x0016\x000\x0016\x00'
* Answer format: (*char)header,(*char)token,(*char)version),(*char)name,(*char)map,(*char)gametype,(int)flags,(int)num_players,(int)max_players,(int)num_clients,(int)max_clients,*players[]
*/
int len_teemaster_packet = 14;
char teemaster_packet[14] = { '\x20', '\x00', '\x00', '\x00', '\x00', '\x00', '\xFF', '\xFF', '\xFF', '\xFF', 'r', 'e', 'q', 't' };
/* master response */
int len_teemaster_list_header = 14;
int len_teemaster_list_headerprefix = 13;
char teemaster_list_headerprefix[13] = { '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', 'l', 'i', 's' };
/*
* To request, we will try 2 request packet, only one character change, so no need to declare 2 strings
*
* char teemaster_packet[14] = { '\x20', '\x00', '\x00', '\x00', '\x00', '\x00', '\xFF', '\xFF', '\xFF', '\xFF', 'r', 'e', 'q', 't' };
* char teemaster_packe2[14] = { '\x20', '\x00', '\x00', '\x00', '\x00', '\x00', '\xFF', '\xFF', '\xFF', '\xFF', 'r', 'e', 'q', '2' };
*
* To analyze response, we will compare the same string without the last character, the the last character, so no need to declare 3 strings
*
* char teemaster_list_header[14] = { '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', 'l', 'i', 's', 't' };
* char teemaster_lis2_header[14] = { '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', 'l', 'i', 's', '2' };
*/
int len_ipv4_header = 12;
char ipv4_header[12] = { '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\xFF', '\xFF' };
query_status_t
send_teeserver_request_packet(struct qserver *server)
{
query_status_t ret;
/*
* Try first then second then third...
* In fact the master server said which server use which protocol, but how qstat can transmit this information?
*/
/* Send v1 packet */
teeserver_request_packet[13] = 'f';
ret = send_packet(server, teeserver_request_packet, 13);
if (ret != INPROGRESS) {
return (ret);
}
/* Send v2 packet */
teeserver_request_packet[13] = '2';
ret = send_packet(server, teeserver_request_packet, len_teeserver_request_packet);
if (ret != INPROGRESS) {
return (ret);
}
/* Send v2 packet */
teeserver_request_packet[13] = '3';
return (send_packet(server, teeserver_request_packet, len_teeserver_request_packet));
}
query_status_t
deal_with_teeserver_packet(struct qserver *server, char *rawpkt, int rawpktlen)
{
int i;
char last_char;
char *current = NULL, *end = NULL, *version = NULL, *tok = NULL;
struct player *player;
server->ping_total += time_delta(&packet_recv_time, &server->packet_time1);
/* packet too short */
if (len_teeserver_info_headerprefix > rawpktlen) {
return (PKT_ERROR);
}
/* not null-terminated packet */
if ((strnlen(rawpkt, rawpktlen) == rawpktlen) && (rawpkt[rawpktlen] != 0)) {
return (PKT_ERROR);
}
/* get the last character */
last_char = rawpkt[len_teeserver_info_headerprefix];
/* compare the response without the last character, and verify if the last character is 'o', '2' or '3' */
if ((memcmp(rawpkt, teeserver_info_headerprefix, len_teeserver_info_headerprefix) != 0) || ((last_char != 'o') && (last_char != '2') && (last_char != '3'))) {
return (PKT_ERROR);
}
current = rawpkt;
end = rawpkt + rawpktlen;
/* header, skip */
current += len_teeserver_info_headerprefix + sizeof(last_char);
/* if inf2 or inf3 */
if ((last_char == '2') || (last_char == '3')) {
/* token, skip */
current += strnlen(current, end - current) + 1;
}
/* version */
version = current;
current += strnlen(current, end - current) + 1;
/* server name */
server->server_name = strdup(current);
current += strnlen(current, end - current) + 1;
/* map name */
server->map_name = strdup(current);
current += strnlen(current, end - current) + 1;
/* game type */
add_rule(server, server->type->game_rule, current, NO_FLAGS);
current += strnlen(current, end - current) + 1;
/* flags, skip */
current += strnlen(current, end - current) + 1;
/* if info or inf2 */
if ((last_char == 'o') || (last_char == '2')) {
// progression, skip
current += strnlen(current, end - current) + 1;
}
/* num players */
server->num_players = atoi(current);
current += strnlen(current, end - current) + 1;
/* max players */
server->max_players = atoi(current);
current += strnlen(current, end - current) + 1;
/* if inf3 */
if (last_char == '3') {
/* Is there a difference between a teeworld spectator and what qstat calls a "client"? */
/* num clients, skip */
current += strnlen(current, end - current) + 1;
/* max clients, skip */
current += strnlen(current, end - current) + 1;
}
/* players */
for (i = 0; i < server->num_players; i++) {
player = add_player(server, i);
player->name = strdup(current);
current += strnlen(current, end - current) + 1;
player->score = atoi(current);
current += strnlen(current, end - current) + 1;
}
/* version reprise */
server->protocol_version = 0;
tok = strtok(version, ".");
if (tok == NULL) {
return (PKT_ERROR);
}
server->protocol_version |= (atoi(tok) & 0x000F) << 12;
tok = strtok(NULL, ".");
if (tok == NULL) {
return (PKT_ERROR);
}
server->protocol_version |= (atoi(tok) & 0x000F) << 8;
tok = strtok(NULL, ".");
if (tok == NULL) {
return (PKT_ERROR);
}
server->protocol_version |= (atoi(tok) & 0x00FF);
return (DONE_FORCE);
}
query_status_t
send_teemaster_request_packet(struct qserver *server)
{
query_status_t ret_packet, ret_packe2;
teemaster_packet[13] = 't';
ret_packet = send_packet(server, teemaster_packet, len_teemaster_packet);
if (ret_packet != INPROGRESS) {
return (ret_packet);
}
teemaster_packet[13] = '2';
ret_packe2 = send_packet(server, teemaster_packet, len_teemaster_packet);
return (ret_packe2);
}
query_status_t
deal_with_teemaster_packet(struct qserver *server, char *rawpkt, int rawpktlen)
{
int i;
char *current;
int previous_len, num_servers;
int len_address_packet;
char last_char;
server->ping_total += time_delta(&packet_recv_time, &server->packet_time1);
if (len_teemaster_list_headerprefix > rawpktlen) {
return (PKT_ERROR);
}
/* get the last character */
last_char = rawpkt[len_teemaster_list_headerprefix];
/* compare the response without the last character */
if ((memcmp(rawpkt, teemaster_list_headerprefix, len_teemaster_list_headerprefix)) != 0) {
return (PKT_ERROR);
}
/* legacy server list format, only ipv4 addresses */
if (last_char == 't') {
len_address_packet = 6;
/* normal server list format, ipv4 and ipv6 addresses */
} else if (last_char == '2') {
len_address_packet = 18;
/* bad or unknown server list format */
} else {
return (PKT_ERROR);
}
previous_len = server->master_pkt_len;
num_servers = (rawpktlen - len_teemaster_list_header) / len_address_packet;
server->n_servers += num_servers;
server->master_pkt_len += num_servers * 6;
server->master_pkt = (char *)realloc(server->master_pkt, server->master_pkt_len);
current = server->master_pkt + previous_len;
rawpkt += len_teemaster_list_header;
rawpktlen -= len_teemaster_list_header;
for (i = 0; i < num_servers; i++) {
if (len_address_packet > rawpktlen) {
return (PKT_ERROR);
}
/* ipv4-only server list */
if (len_address_packet == 6) {
memcpy(current, rawpkt, 6);
memcpy(current + 5, rawpkt + 4, 1);
memcpy(current + 4, rawpkt + 5, 1);
/* ipv4 and ipv6 server list */
} else {
/* ipv4 server address */
if (memcmp(rawpkt, ipv4_header, len_ipv4_header) == 0) {
memcpy(current, rawpkt + len_ipv4_header, 6);
}
/* else it's an ipv6 server address, which is currently unsuported, hence ignored */
}
current += 6;
rawpkt += len_address_packet;
rawpktlen -= len_address_packet;
}
if (len_address_packet == 6) {
return (INPROGRESS);
}
server->server_name = MASTER;
return (DONE_AUTO);
}