1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/*
* NetCosm - a MUD server
* Copyright (C) 2016 Franklin Wei
*
* This program 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/>.
*/
/* You should use #pragma once everywhere. */
#pragma once
#define _GNU_SOURCE
#include <ev.h>
#include <gcrypt.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <netinet/in.h>
#include <poll.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/file.h>
#include <sys/ipc.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#define USERFILE "users.dat"
#define WORLDFILE "world.dat"
#define WORLD_MAGIC 0xff467777
#define MAX_FAILURES 3
#define NETCOSM_VERSION "0.2"
#define MAX_NAME_LEN 32
#define PRIV_NONE -1
#define PRIV_USER 0
#define PRIV_ADMIN 1337
/* for convenience when writing world specs */
#define NONE_N NULL
#define NONE_NE NULL
#define NONE_E NULL
#define NONE_SE NULL
#define NONE_S NULL
#define NONE_SW NULL
#define NONE_W NULL
#define NONE_NW NULL
#define NONE_UP NULL
#define NONE_DN NULL
#define NONE_IN NULL
#define NONE_OT NULL
/* needs to be less than PIPE_BUF, which is 4096 */
#define MSG_MAX 2048
#define ARRAYLEN(x) (sizeof(x)/sizeof(x[0]))
#define MAX(a,b) ((a>b)?(a):(b))
#define MIN(a,b) ((a<b)?(a):(b))
#ifndef NDEBUG
#define debugf(fmt,...) debugf_real(__func__, __LINE__, __FILE__, fmt, ##__VA_ARGS__)
#define sig_debugf debugf
#else
#define debugf(fmt,...)
#define sig_debugf debugf
#endif
#define ROOM_NONE -1
typedef int room_id;
enum direction_t { DIR_N = 0, DIR_NE, DIR_E, DIR_SE, DIR_S, DIR_SW, DIR_W, DIR_NW, DIR_UP, DIR_DN, DIR_IN, DIR_OT, NUM_DIRECTIONS };
/* the data we get from a world module */
struct roomdata_t {
/* the non-const pointers can be modified by the world module */
const char * const uniq_id;
/* mutable properties */
char *name;
char *desc;
const char * const adjacent[NUM_DIRECTIONS];
void (* const hook_init)(room_id id);
void (* const hook_enter)(room_id room, pid_t player);
void (* const hook_say)(room_id room, pid_t player, const char *msg);
void (* const hook_leave)(room_id room, pid_t player);
};
struct room_t {
room_id id;
struct roomdata_t data;
room_id adjacent[NUM_DIRECTIONS];
/* arrays instead of linked lists because insertion should be rare for these */
size_t objects_sz;
struct object_t *objects;
size_t verbs_sz;
struct verb_t *verbs;
/* linked list for users, random access is rare */
struct user_t *users;
int num_users;
};
/* used by the room module to keep track of users in rooms */
struct user_t {
struct child_data *data;
struct user_t *next;
};
struct object_t {
const char *class;
};
struct verb_t {
const char *name;
/* toks is strtok_r's pointer */
void (*execute)(const char *toks);
};
struct child_data {
pid_t pid;
int readpipe[2];
int outpipe[2];
int state;
room_id room;
char *user;
ev_io *io_watcher;
ev_child *sigchld_watcher;
struct ev_loop *loop;
struct in_addr addr;
};
#include "auth.h"
#include "hash.h"
#include "server_reqs.h"
#include "telnet.h"
#include "userdb.h"
/* globals */
extern const struct roomdata_t netcosm_world[];
extern const size_t netcosm_world_sz;
extern const char *netcosm_world_name;
extern volatile int num_clients;
extern void *child_map;
extern enum reqdata_typespec { TYPE_NONE = 0, TYPE_USERDATA, TYPE_BOOLEAN } reqdata_type;
extern union reqdata_t {
struct userdata_t userdata;
bool boolean;
} returned_reqdata;
extern bool are_child;
/* called for every client */
void client_main(int sock, struct sockaddr_in *addr, int, int to_parent, int from_parent);
void out(const char *fmt, ...) __attribute__((format(printf,1,2)));
void out_raw(const unsigned char*, size_t);
/* room/world */
void world_init(const struct roomdata_t *data, size_t sz, const char *name);
bool world_load(const char *fname, const struct roomdata_t *data, size_t data_sz, const char *world_name);
void world_save(const char *fname);
struct room_t *room_get(room_id id);
bool room_user_add(room_id id, struct child_data *child);
bool room_user_del(room_id id, struct child_data *child);
void world_free(void);
/* utility functions */
void __attribute__((noreturn,format(printf,1,2))) error(const char *fmt, ...);
void debugf_real(const char*, int, const char*, const char *fmt, ...);
void remove_cruft(char*);
void all_upper(char*);
/* call from child process ONLY */
void send_master(unsigned char cmd, const void *data, size_t sz);
/* the master sends the child SIGRTMIN+0 */
void sig_rt_0_handler(int s, siginfo_t *info, void *v);
|
