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config.c
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config.c
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/*
* qstat
* by Steve Jankowski
* steve@qstat.org
* http://www.qstat.org
*
* Copyright 1996,1997,1998,1999 by Steve Jankowski
*
* Licensed under the Artistic License, see LICENSE.txt for license terms
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#ifndef _WIN32
#include <unistd.h>
#include <sys/param.h>
#endif
#include "config.h"
#ifdef __hpux
#define STATIC static
#else
#define STATIC
#endif
#ifdef _WIN32
#define strcasecmp stricmp
#endif
#define CONFIG_FILE "qstat.cfg"
#ifdef _WIN32
#define HOME_CONFIG_FILE CONFIG_FILE
#define SEP "\\"
#else
#define HOME_CONFIG_FILE ".qstatrc"
#define SEP "/"
#endif
static server_type **config_types;
static int n_config_types;
static int max_config_types;
static int next_gametype_id = LAST_BUILTIN_SERVER + 1;
static int load_config_file(char const *filename);
static int try_load_config_file(char const *filename, int const show_error);
static int pf_top_level(char *text, void *context);
static int pf_gametype_new(char *text, void *context);
static int pf_gametype_modify(char *text, void *context);
static int set_game_type_value(server_type *gametype, int key, char *value);
static int modify_game_type_value(server_type *gametype, int key, char *value);
static int set_packet_value(server_type *gametype, char const *value,
char const *packet_name, char **packet, int *len);
static char *first_token(char *text);
static char *next_token();
static char *next_token_dup();
static char *next_value();
static char *parse_value(char *source, int len);
static unsigned int parse_hex(char *hex, int len, int *error);
static unsigned int parse_oct(char *oct, int len, int *error);
static char *force_lower_case(char *string);
static char *force_upper_case(char *string);
static char *get_token();
static void *memdup(const void *mem, unsigned int len);
int parse_config_file(FILE *file);
static int (*parse_func)(char *, void *);
static void *parse_context;
static int line;
static char const *current_file_name;
static char *parse_text;
static char *parse_end;
static char *lex;
static char *token_end;
static char token_buf[1024];
static int value_len;
static int debug = 0;
#define REPORT_ERROR(a) print_location(); fprintf a; fprintf(stderr, "\n")
enum {
CK_NONE = 0,
CK_MASTER_PROTOCOL,
CK_MASTER_QUERY,
CK_MASTER_PACKET,
CK_FLAGS,
CK_NAME,
CK_DEFAULT_PORT,
CK_GAME_RULE,
CK_TEMPLATE_VAR,
CK_MASTER_TYPE,
CK_STATUS_PACKET,
CK_STATUS2_PACKET,
CK_PLAYER_PACKET,
CK_RULE_PACKET,
CK_PORT_OFFSET
};
typedef struct _config_key {
int key;
char *key_name;
} ConfigKey;
static ConfigKey const new_keys[] =
{
{ CK_MASTER_PROTOCOL, "master protocol" },
{ CK_MASTER_QUERY, "master query" },
{ CK_MASTER_PACKET, "master packet" },
{ CK_FLAGS, "flags" },
{ CK_NAME, "name" },
{ CK_DEFAULT_PORT, "default port" },
{ CK_GAME_RULE, "game rule" },
{ CK_TEMPLATE_VAR, "template var" },
{ CK_MASTER_TYPE, "master for gametype" },
{ CK_STATUS_PACKET, "status packet" },
{ CK_STATUS2_PACKET, "status2 packet" },
{ CK_PLAYER_PACKET, "player packet" },
{ CK_RULE_PACKET, "rule packet" },
{ CK_PORT_OFFSET, "status port offset" },
{ 0, NULL },
};
static ConfigKey const modify_keys[] =
{
{ CK_MASTER_PROTOCOL, "master protocol" },
{ CK_MASTER_QUERY, "master query" },
{ CK_MASTER_PACKET, "master packet" },
{ CK_FLAGS, "flags" },
{ CK_MASTER_TYPE, "master for gametype" },
{ 0, NULL },
};
typedef struct {
const char *name;
int value;
} ServerFlag;
#define SERVER_FLAG(x) { # x, x }
ServerFlag const server_flags[] =
{
SERVER_FLAG(TF_SINGLE_QUERY),
SERVER_FLAG(TF_OUTFILE),
SERVER_FLAG(TF_MASTER_MULTI_RESPONSE),
SERVER_FLAG(TF_TCP_CONNECT),
SERVER_FLAG(TF_QUERY_ARG),
SERVER_FLAG(TF_QUERY_ARG_REQUIRED),
SERVER_FLAG(TF_QUAKE3_NAMES),
SERVER_FLAG(TF_TRIBES2_NAMES),
SERVER_FLAG(TF_SOF_NAMES),
SERVER_FLAG(TF_U2_NAMES),
SERVER_FLAG(TF_RAW_STYLE_QUAKE),
SERVER_FLAG(TF_RAW_STYLE_TRIBES),
SERVER_FLAG(TF_RAW_STYLE_GHOSTRECON),
SERVER_FLAG(TF_NO_PORT_OFFSET),
SERVER_FLAG(TF_SHOW_GAME_PORT),
{ NULL, 0 }
};
#undef SERVER_FLAG
static int get_config_key(char *first_token, const ConfigKey *keys);
static void add_config_type(server_type *gametype);
static server_type *get_config_type(char *game_type);
static void copy_server_type(server_type *dest, server_type *source);
static server_type *get_server_type(char *game_type);
static server_type *get_builtin_type(char *game_type);
typedef struct _gametype_context {
char *type;
char *extend_type;
server_type *gametype;
} GameTypeContext;
static void
print_location()
{
fprintf(stderr, "%s line %d: ", current_file_name, line);
}
/*
* 1. $QSTAT_CONFIG
* 2. UNIX: $HOME/.qstatrc WIN: $HOME/qstat.cfg
* 3. UNIX: sysconfdir/qstat.cfg WIN: qstat.exe-dir/qstat.cfg
*/
int
qsc_load_default_config_files()
{
int rc = 0;
char *filename = NULL, *var;
char path[PATH_MAX];
var = getenv("QSTAT_CONFIG");
if ((var != NULL) && (var[0] != '\0')) {
rc = try_load_config_file(var, 1);
if ((rc == 0) || (rc == -1)) {
return (rc);
}
}
var = getenv("HOME");
if ((var != NULL) && (var[0] != '\0')) {
int len = strlen(var) + 1;
if (len > PATH_MAX - strlen(HOME_CONFIG_FILE) + 2) {
fprintf(stderr, "Path for HOME \"%s\" too long\n", var);
return (-1);
}
strncpy(path, var, len);
strcat(path, SEP HOME_CONFIG_FILE);
rc = try_load_config_file(path, 0);
if ((rc == 0) || (rc == -1)) {
return (rc);
}
}
#ifdef sysconfdir
strcpy(path, sysconfdir SEP CONFIG_FILE);
filename = path;
#elif defined(_WIN32)
// Look in the binaries directory
rc = GetModuleFileName(NULL, path, PATH_MAX);
if (rc == PATH_MAX) {
fprintf(stderr, "Module path too long\n");
return (1);
}
var = strrchr(path, '\\');
if (var == NULL) {
fprintf(stderr, "Unexpected module path \"%s\" (no seperator %s)\n", path, SEP);
return (-1);
}
*var = '\0';
if (strlen(path) >= PATH_MAX - 11) {
fprintf(stderr, "Module path \"%s\" too long\n", path);
return (-1);
}
strcat(path, SEP CONFIG_FILE);
filename = path;
#endif
if (filename != NULL) {
rc = try_load_config_file(filename, 0);
}
return (rc);
}
int
qsc_load_config_file(char const *filename)
{
int rc = load_config_file(filename);
if (rc == -2) {
perror(filename);
fprintf(stderr, "Could not open config file \"%s\"\n",
filename);
return (-1);
}
return (rc);
}
server_type **
qsc_get_config_server_types(int *n_config_types_ref)
{
if (n_config_types_ref) {
*n_config_types_ref = n_config_types;
}
return (config_types);
}
STATIC int
try_load_config_file(char const *filename, int const show_error)
{
int rc = load_config_file(filename);
if ((rc == -2) && show_error) {
perror(filename);
fprintf(stderr, "Error: Could not open config file \"%s\"\n",
filename);
} else if (rc == -1) {
fprintf(stderr, "Error: Could not load config file \"%s\"\n",
filename);
}
return (rc);
}
STATIC int
load_config_file(char const *filename)
{
FILE *file;
int rc;
file = fopen(filename, "r");
if (file == NULL) {
return (-2);
}
current_file_name = filename;
rc = parse_config_file(file);
fclose(file);
return (rc);
}
int
parse_config_file(FILE *file)
{
char buf[4096];
int rc;
line = 0;
parse_func = pf_top_level;
while (fgets(buf, sizeof(buf), file) != NULL) {
int len = strlen(buf);
while (len && (buf[len - 1] == '\n' || buf[len - 1] == '\r')) {
len--;
}
buf[len] = '\0';
line++;
rc = parse_func(buf, parse_context);
if (rc != 0) {
return (rc);
}
}
return (0);
}
/* Top level
* Keywords: gametype
*/
STATIC int
pf_top_level(char *text, void *_context)
{
GameTypeContext *context;
server_type *extend;
char *token, *game_type, *extend_type;
token = first_token(text);
if (token == NULL) {
return (0);
}
if (strcmp(token, "gametype") != 0) {
REPORT_ERROR((stderr, "Unknown config command \"%s\"", token));
return (-1);
}
game_type = next_token_dup();
if (game_type == NULL) {
REPORT_ERROR((stderr, "Missing game type"));
return (-1);
}
force_lower_case(game_type);
token = next_token();
if (token == NULL) {
REPORT_ERROR((stderr, "Expecting \"new\" or \"modify\""));
return (-1);
}
if (strcmp(token, "new") == 0) {
parse_func = pf_gametype_new;
} else if (strcmp(token, "modify") == 0) {
parse_func = pf_gametype_modify;
} else {
REPORT_ERROR((stderr, "Expecting \"new\" or \"modify\""));
return (-1);
}
context = (GameTypeContext *)malloc(sizeof(GameTypeContext));
context->type = game_type;
context->extend_type = NULL;
context->gametype = NULL;
token = next_token();
if (parse_func == pf_gametype_modify) {
if (token != NULL) {
REPORT_ERROR((stderr, "Extra text after gametype modify"));
return (-1);
}
context->gametype = get_server_type(game_type);
if (context->gametype == NULL) {
REPORT_ERROR((stderr, "Unknown game type \"%s\"", game_type));
free(context);
return (-1);
}
parse_context = context;
return (0);
}
if ((token == NULL) || (strcmp(token, "extend") != 0)) {
REPORT_ERROR((stderr, "Expecting \"extend\""));
return (-1);
}
extend_type = next_token();
if (extend_type == NULL) {
REPORT_ERROR((stderr, "Missing extend game type"));
return (-1);
}
force_lower_case(extend_type);
if (strcasecmp(extend_type, game_type) == 0) {
REPORT_ERROR((stderr, "Identical game type and extend type"));
return (-1);
}
context->extend_type = extend_type;
extend = get_server_type(extend_type);
if (extend == NULL) {
REPORT_ERROR((stderr, "Unknown extend game type \"%s\"", extend_type));
return (-1);
}
/* Over-write a previous gametype new */
context->gametype = get_config_type(game_type);
if (context->gametype == NULL) {
context->gametype = (server_type *)malloc(sizeof(server_type));
}
copy_server_type(context->gametype, extend);
/* Set flag for new type-id if not re-defining previous config type */
if (get_config_type(game_type) == NULL) {
context->gametype->id = 0;
}
context->gametype->type_string = game_type;
context->gametype->type_prefix = strdup(game_type);
force_upper_case(context->gametype->type_prefix);
context->gametype->type_option = (char *)malloc(strlen(game_type) + 2);
context->gametype->type_option[0] = '-';
strcpy(&context->gametype->type_option[1], game_type);
parse_context = context;
return (0);
}
STATIC int
pf_gametype_modify(char *text, void *_context)
{
GameTypeContext *context = (GameTypeContext *)_context;
char *token;
int key;
token = first_token(text);
if (token == NULL) {
return (0);
}
if (strcmp(token, "end") == 0) {
parse_func = pf_top_level;
parse_context = NULL;
return (0);
}
key = get_config_key(token, modify_keys);
token = next_token();
if (strcmp(token, "=") != 0) {
REPORT_ERROR((stderr, "Expecting \"=\", found \"%s\"", token));
return (-1);
}
token = next_value();
if (token == NULL) {
REPORT_ERROR((stderr, "Missing value after \"=\""));
return (-1);
}
if (debug) {
printf("%d %s = <%s>\n", key, modify_keys[key - 1].key_name,
token ? token : "");
}
return (modify_game_type_value(context->gametype, key, token));
}
STATIC int
pf_gametype_new(char *text, void *_context)
{
GameTypeContext *context = (GameTypeContext *)_context;
char *token;
int key;
token = first_token(text);
if (token == NULL) {
return (0);
}
if (strcmp(token, "end") == 0) {
add_config_type(context->gametype);
parse_func = pf_top_level;
parse_context = NULL;
return (0);
}
key = get_config_key(token, new_keys);
if (key <= 0) {
return (key);
}
token = next_token();
if (strcmp(token, "=") != 0) {
REPORT_ERROR((stderr, "Expecting \"=\", found \"%s\"", token));
return (-1);
}
token = next_value();
if ((token == NULL) && ((key != CK_MASTER_PROTOCOL) && (key != CK_MASTER_QUERY))) {
REPORT_ERROR((stderr, "Missing value after \"=\""));
return (-1);
}
if (debug) {
printf("%d %s = <%s>\n", key, new_keys[key - 1].key_name, token ? token : "");
}
return (set_game_type_value(context->gametype, key, token));
}
STATIC int
get_config_key(char *first_token, const ConfigKey *keys)
{
char key_name[1024], *token;
int key = 0;
strcpy(key_name, first_token);
do {
int k;
for (k = 0; keys[k].key_name; k++) {
if (strcmp(keys[k].key_name, key_name) == 0) {
key = keys[k].key;
break;
}
}
if (key) {
break;
}
token = next_token();
if ((token == NULL) || (strcmp(token, "=") == 0)) {
break;
}
if (strlen(key_name) + strlen(token) > sizeof(key_name) - 2) {
REPORT_ERROR((stderr, "Key name too long"));
return (-1);
}
strcat(key_name, " ");
strcat(key_name, token);
} while (1);
if (key == 0) {
REPORT_ERROR((stderr, "Unknown config key \"%s\"", key_name));
return (-1);
}
return (key);
}
STATIC int
get_server_flag_value(const char *value, unsigned len)
{
int i = 0;
for (i = 0; server_flags[i].name; ++i) {
if ((len == strlen(server_flags[i].name)) &&
(strncmp(server_flags[i].name, value, len) == 0)) {
return (server_flags[i].value);
}
}
return (-1);
}
STATIC int
parse_server_flags(const char *value)
{
int val = 0, v, first = 1;
const char *s = value;
const char *e;
while (*s) {
while (isspace((unsigned char)*s)) {
++s;
}
if (!first) {
if (*s != '|') {
REPORT_ERROR((stderr, "Syntax error: expecting |"));
val = -1;
break;
}
++s;
while (isspace((unsigned char)*s)) {
++s;
}
} else {
first = 0;
}
e = s;
while (isalnum((unsigned char)*e) || *e == '_') {
++e;
}
if (e == s) {
REPORT_ERROR((stderr, "Syntax error: expecting flag"));
val = -1;
break;
}
v = get_server_flag_value(s, e - s);
if (v == -1) {
REPORT_ERROR((stderr, "Syntax error: invalid flag"));
val = -1;
break;
}
s = e;
val |= v;
}
return (val);
}
STATIC int
set_game_type_value(server_type *gametype, int key, char *value)
{
switch (key) {
case CK_NAME:
gametype->game_name = strdup(value);
break;
case CK_FLAGS:
{
int flags = parse_server_flags(value);
if (flags == -1) {
return (-1);
}
gametype->flags = flags;
}
break;
case CK_DEFAULT_PORT:
{
unsigned short port;
if (sscanf(value, "%hu", &port) != 1) {
REPORT_ERROR((stderr, "Syntax error on port. Should be a number between 1 and 65535."));
return (-1);
}
gametype->default_port = port;
break;
}
case CK_GAME_RULE:
gametype->game_rule = strdup(value);
break;
case CK_TEMPLATE_VAR:
gametype->template_var = strdup(value);
force_upper_case(gametype->template_var);
break;
case CK_MASTER_PROTOCOL:
if (!gametype->master) {
REPORT_ERROR((stderr, "Cannot set master protocol on non-master game type\n"));
return (-1);
}
if (value) {
gametype->master_protocol = strdup(value);
} else {
gametype->master_protocol = NULL;
}
break;
case CK_MASTER_QUERY:
if (!gametype->master) {
REPORT_ERROR((stderr, "Cannot set master query on non-master game type\n"));
return (-1);
}
if (value) {
gametype->master_query = strdup(value);
} else {
gametype->master_query = NULL;
}
break;
case CK_MASTER_TYPE:
{
server_type *type;
if (!gametype->master) {
REPORT_ERROR((stderr, "Cannot set master type on non-master game type\n"));
return (-1);
}
force_lower_case(value);
type = get_server_type(value);
if (type == NULL) {
REPORT_ERROR((stderr, "Unknown server type \"%s\"\n", value));
return (-1);
}
gametype->master = type->id;
}
break;
case CK_MASTER_PACKET:
if (!gametype->master) {
REPORT_ERROR((stderr, "Cannot set master packet on non-master game type"));
return (-1);
}
if ((value == NULL) || (value[0] == '\0')) {
REPORT_ERROR((stderr, "Empty master packet"));
return (-1);
}
gametype->master_packet = memdup(value, value_len);
gametype->master_len = value_len;
break;
case CK_STATUS_PACKET:
return (set_packet_value(gametype, value, "status",
&gametype->status_packet, &gametype->status_len));
case CK_STATUS2_PACKET:
return (set_packet_value(gametype, value, "status2",
&gametype->rule_packet, &gametype->rule_len));
case CK_PLAYER_PACKET:
return (set_packet_value(gametype, value, "player",
&gametype->player_packet, &gametype->player_len));
case CK_RULE_PACKET:
return (set_packet_value(gametype, value, "rule",
&gametype->rule_packet, &gametype->rule_len));
case CK_PORT_OFFSET:
{
short port;
if (sscanf(value, "%hd", &port) != 1) {
REPORT_ERROR((stderr, "Syntax error on port. Should be a number between 32767 and -32768."));
return (-1);
}
gametype->port_offset = port;
break;
}
}
return (0);
}
STATIC int
set_packet_value(server_type *gametype, char const *value, char const *packet_name,
char **packet, int *len)
{
if (gametype->master) {
REPORT_ERROR((stderr, "Cannot set info packet on master game type"));
return (-1);
}
if ((value == NULL) || (value[0] == '\0')) {
REPORT_ERROR((stderr, "Empty %s packet", packet_name));
return (-1);
}
// Removed as this doesn't seem to be any reason why we can't do this and it works just fine for warsow
//if ( *packet == NULL) {
// REPORT_ERROR((stderr, "Cannot set %s packet; extend game type does not define a %s packet", packet_name, packet_name));
// return -1;
//}
*packet = memdup(value, value_len);
*len = value_len;
return (0);
}
STATIC int
modify_game_type_value(server_type *gametype, int key, char *value)
{
switch (key) {
case CK_FLAGS:
{
int flags = parse_server_flags(value);
if (flags == -1) {
return (-1);
}
gametype->flags = flags;
}
break;
case CK_MASTER_PROTOCOL:
if (!gametype->master) {
REPORT_ERROR((stderr, "Cannot set master protocol on non-master game type"));
return (-1);
}
if (value) {
gametype->master_protocol = strdup(value);
} else {
gametype->master_protocol = NULL;
}
break;
case CK_MASTER_QUERY:
if (!gametype->master) {
REPORT_ERROR((stderr, "Cannot set master query on non-master game type"));
return (-1);
}
if (value) {
gametype->master_query = strdup(value);
} else {
gametype->master_query = NULL;
}
break;
case CK_MASTER_PACKET:
if (!gametype->master) {
REPORT_ERROR((stderr, "Cannot set master packet on non-master game type"));
return (-1);
}
if ((value == NULL) || (value[0] == '\0')) {
REPORT_ERROR((stderr, "Empty master packet"));
return (-1);
}
gametype->master_packet = memdup(value, value_len);
gametype->master_len = value_len;
break;
case CK_MASTER_TYPE:
{
server_type *type;
if (!gametype->master) {
REPORT_ERROR((stderr, "Cannot set master type on non-master game type\n"));
return (-1);
}
force_lower_case(value);
type = get_server_type(value);
if (type == NULL) {
REPORT_ERROR((stderr, "Unknown server type \"%s\"\n", value));
return (-1);
}
gametype->master = type->id;
}
break;
}
return (0);
}
STATIC server_type *
get_server_type(char *game_type)
{
server_type *result;
result = get_builtin_type(game_type);
if (result != NULL) {
return (result);
}
return (get_config_type(game_type));
}
STATIC server_type *
get_builtin_type(char *type_string)
{
server_type *type = &builtin_types[0];
for ( ; type->id != Q_UNKNOWN_TYPE; type++) {
if (strcmp(type->type_string, type_string) == 0) {
return (type);
}
}
return (NULL);
}
STATIC void
add_config_type(server_type *gametype)
{
if (gametype->id == 0) {
if (next_gametype_id >= MASTER_SERVER) {
REPORT_ERROR((stderr, "Exceeded game type limit, ignoring \"%s\"",
gametype->type_string));
return;
}
gametype->id = next_gametype_id;
if (gametype->master) {
gametype->id |= MASTER_SERVER;
}
next_gametype_id++;
}
if (max_config_types == 0) {
max_config_types = 4;
config_types = (server_type **)malloc(sizeof(server_type *) * (max_config_types + 1));
} else if (n_config_types >= max_config_types) {
max_config_types *= 2;
config_types = (server_type **)realloc(config_types,
sizeof(server_type *) * (max_config_types + 1));
}
config_types[n_config_types] = gametype;
n_config_types++;
}
STATIC server_type *
get_config_type(char *game_type)
{
int i;
for (i = 0; i < n_config_types; i++) {
if (strcmp(config_types[i]->type_string, game_type) == 0) {
return (config_types[i]);
}
}
return (NULL);
}
STATIC void
copy_server_type(server_type *dest, server_type *source)
{
*dest = *source;
}
STATIC void *
memdup(const void *mem, unsigned int len)
{
void *result = malloc(len);
if (NULL == result) {
REPORT_ERROR((stderr, "Failed to malloc %d bytes of memory", len));
return (NULL);
}
memcpy(result, mem, len);
return (result);
}
/* Parsing primitives
*/
STATIC char *
first_token(char *text)
{
parse_text = text;
parse_end = parse_text + strlen(parse_text);
lex = text;
token_end = text;
if (*lex == '#') {
return (NULL);
}
return (get_token());
}
STATIC char *
next_token()
{
lex = token_end;
return (get_token());
}
STATIC char *
next_token_dup()
{
return (strdup(next_token()));
}
STATIC char *
get_token()