src/d2cs/gs_scope.c

#include "common/setup_before.h"
#include "setup.h"

#ifdef HAVE_STDDEF_H
# include <stddef.h>
#else
# ifndef NULL
#  define NULL ((void *)0)
# endif
#endif
#ifdef STDC_HEADERS
# include <stdlib.h>
#else
# ifdef HAVE_MALLOC_H
#  include <malloc.h>
# endif
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#else
# ifdef HAVE_STRINGS_H
#  include <strings.h>
# endif
#endif
#include "compat/strsep.h"
#include "compat/char_bit.h"
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h> /* needed to include netinet/in.h */
#endif
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#include "compat/socket.h"
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#include "compat/netinet_in.h"
#ifdef HAVE_ARPA_INET_H
# include <arpa/inet.h> /* FIXME: probably not needed... do some systems put types in here or something? */
#endif
#ifdef TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# ifdef HAVE_SYS_TIME_H
#  include <sys/time.h>
# else
#  include <time.h>
# endif
#endif
#include "compat/psock.h"
#include <regex.h>

#include "d2gs.h"
#include "game.h"
#include "net.h"
#include "bit.h"
#include "prefs.h"
#include "gs_scope.h"
#include "connection.h"
#include "common/introtate.h"
#include "common/addr.h"
#include "common/list.h"
#include "common/eventlog.h"
#include "common/xalloc.h"
#include "common/setup_after.h"

/* Added by Leaflet at 2006-06-05 Begin */
// TODO: Rewriting these code is requied
// All these configuration should be put into a seperate configuration file

struct serve_scope_addr {
        regex_t *preg;
        unsigned short deny;
        struct serve_scope_addr *next;
};

struct serve_scope_addr_list {
        unsigned int ip;
        struct serve_scope_addr *head;
        struct serve_scope_addr_list *next;
};

static struct serve_scope_addr_list *serve_scope_list = NULL;

extern int serve_scope_list_load(const char *filename)
{
        FILE *fp;
        char temp[256], buffer[256];
        int section_begin = 0;
        struct serve_scope_addr_list *current_list, *new_list;
        struct serve_scope_addr *current_addr, *new_addr;
        
        unsigned int ip;

        if ((fp=fopen(filename, "r"))== NULL)
        {
            eventlog(eventlog_level_error, __FUNCTION__, "unable to read file %s", filename);
            return -1;
        }
        
        while(fgets(buffer, 255, fp))
        {
                switch(buffer[0])
                {
                        case '!': // Begin of new server section
                                new_list = (struct serve_scope_addr_list *)malloc(sizeof(struct serve_scope_addr_list));
                                if (sscanf(buffer, "%*c %s", temp) == EOF)
                                        continue;
                                if ((ip=net_inet_addr(temp))==~0U) {
                                        eventlog(eventlog_level_error,__FUNCTION__,"got bad ip address %s",temp);
                                        serve_scope_list_unload();
                                        return -2;
                                }

                                if (!serve_scope_list)
                                        serve_scope_list = new_list;
                                else
                                        current_list->next = new_list;
                                current_list = new_list;
                                current_list->head = NULL;
                                current_list->next = NULL;
                                
                                current_list->ip = ntohl(ip);
                                break;
                        case '@':
                        case '~':
                                new_addr = (struct serve_scope_addr *)malloc(sizeof(struct serve_scope_addr));
                                if (sscanf(buffer, "%*c %s", temp) == EOF)
                                        continue;

                                if (!current_list->head)
                                        current_list->head = new_addr;
                                else
                                        current_addr->next = new_addr;
                                current_addr = new_addr;
                                current_addr->next = NULL;
                                
                                current_addr->preg = (regex_t *) malloc (sizeof (regex_t));
                                if (regcomp (current_addr->preg, temp, REG_EXTENDED|REG_NOSUB) != 0)
                                {
                                        eventlog(eventlog_level_error,__FUNCTION__,"Compile regular expression pattern failed %s",temp);
                                        free (current_addr->preg);
                                        serve_scope_list_unload();
                                        return -3;
                                }
                                current_addr->deny = (buffer[0]=='~');

                                break;
                }
        }
        
        fclose(fp);

        return 0;
}

extern void serve_scope_list_unload(void)
{
        struct serve_scope_addr_list *current_list;
        struct serve_scope_addr *current_addr;
        
        while(serve_scope_list)
        {
                current_list = serve_scope_list;
                serve_scope_list = serve_scope_list->next;
                while(current_list->head)
                {
                        current_addr = current_list->head;
                        current_list->head = current_list->head->next;
                        regfree(current_addr->preg);
                        free(current_addr->preg);
                        free(current_addr);
                }
                free(current_list);
        }
}

extern int serve_scope_list_reload(const char *filename)
{
        serve_scope_list_unload();
        return serve_scope_list_load(filename);
}

extern int serve_scope_list_validate(unsigned int ip, t_connection *c)
{
        struct serve_scope_addr_list *current_list;
        struct serve_scope_addr *current_addr;
        regmatch_t pmatch[10];

    struct sockaddr_in  tsa;
    
    memset(&tsa,0,sizeof(tsa));
    tsa.sin_family = PSOCK_AF_INET;
    tsa.sin_port = htons((unsigned short)0);
    tsa.sin_addr.s_addr = htonl(c->addr);
        
        current_list = serve_scope_list;
        while(current_list)
        {
                if (current_list->ip == ip)
                {
                        current_addr = current_list->head;
                        while(current_addr)
                        {
                                if (!regexec (current_addr->preg, inet_ntoa(tsa.sin_addr), 0, pmatch, 0))
                                        return current_addr->deny; // Match
                                current_addr = current_addr->next;
                        }
                        return 1; // No match serve scope
                }
                current_list = current_list->next;
        }
        
        return 0; // No match game server
}

/* End */
1	sysadm	1.1	#include "common/setup_before.h"
2			#include "setup.h"
3
4			#ifdef HAVE_STDDEF_H
5			# include <stddef.h>
6			#else
7			# ifndef NULL
8			# define NULL ((void *)0)
9			# endif
10			#endif
11			#ifdef STDC_HEADERS
12			# include <stdlib.h>
13			#else
14			# ifdef HAVE_MALLOC_H
15			# include <malloc.h>
16			# endif
17			#endif
18			#ifdef HAVE_STRING_H
19			# include <string.h>
20			#else
21			# ifdef HAVE_STRINGS_H
22			# include <strings.h>
23			# endif
24			#endif
25			#include "compat/strsep.h"
26			#include "compat/char_bit.h"
27			#ifdef HAVE_SYS_TYPES_H
28			# include <sys/types.h> /* needed to include netinet/in.h */
29			#endif
30			#ifdef HAVE_SYS_SOCKET_H
31			# include <sys/socket.h>
32			#endif
33			#include "compat/socket.h"
34			#ifdef HAVE_SYS_PARAM_H
35			# include <sys/param.h>
36			#endif
37			#ifdef HAVE_NETINET_IN_H
38			# include <netinet/in.h>
39			#endif
40			#include "compat/netinet_in.h"
41			#ifdef HAVE_ARPA_INET_H
42			# include <arpa/inet.h> /* FIXME: probably not needed... do some systems put types in here or something? */
43			#endif
44			#ifdef TIME_WITH_SYS_TIME
45			# include <sys/time.h>
46			# include <time.h>
47			#else
48			# ifdef HAVE_SYS_TIME_H
49			# include <sys/time.h>
50			# else
51			# include <time.h>
52			# endif
53			#endif
54			#include "compat/psock.h"
55			#include <regex.h>
56
57			#include "d2gs.h"
58			#include "game.h"
59			#include "net.h"
60			#include "bit.h"
61			#include "prefs.h"
62			#include "gs_scope.h"
63			#include "connection.h"
64			#include "common/introtate.h"
65			#include "common/addr.h"
66			#include "common/list.h"
67			#include "common/eventlog.h"
68			#include "common/xalloc.h"
69			#include "common/setup_after.h"
70
71			/* Added by Leaflet at 2006-06-05 Begin */
72			// TODO: Rewriting these code is requied
73			// All these configuration should be put into a seperate configuration file
74
75			struct serve_scope_addr {
76			regex_t *preg;
77			unsigned short deny;
78			struct serve_scope_addr *next;
79			};
80
81			struct serve_scope_addr_list {
82			unsigned int ip;
83			struct serve_scope_addr *head;
84			struct serve_scope_addr_list *next;
85			};
86
87			static struct serve_scope_addr_list *serve_scope_list = NULL;
88
89			extern int serve_scope_list_load(const char *filename)
90			{
91			FILE *fp;
92			char temp[256], buffer[256];
93			int section_begin = 0;
94			struct serve_scope_addr_list current_list, new_list;
95			struct serve_scope_addr current_addr, new_addr;
96
97			unsigned int ip;
98
99			if ((fp=fopen(filename, "r"))== NULL)
100			{
101			eventlog(eventlog_level_error, __FUNCTION__, "unable to read file %s", filename);
102			return -1;
103			}
104
105			while(fgets(buffer, 255, fp))
106			{
107			switch(buffer[0])
108			{
109			case '!': // Begin of new server section
110			new_list = (struct serve_scope_addr_list *)malloc(sizeof(struct serve_scope_addr_list));
111			if (sscanf(buffer, "%*c %s", temp) == EOF)
112			continue;
113			if ((ip=net_inet_addr(temp))==~0U) {
114			eventlog(eventlog_level_error,__FUNCTION__,"got bad ip address %s",temp);
115			serve_scope_list_unload();
116			return -2;
117			}
118
119			if (!serve_scope_list)
120			serve_scope_list = new_list;
121			else
122			current_list->next = new_list;
123			current_list = new_list;
124			current_list->head = NULL;
125			current_list->next = NULL;
126
127			current_list->ip = ntohl(ip);
128			break;
129			case '@':
130			case '~':
131			new_addr = (struct serve_scope_addr *)malloc(sizeof(struct serve_scope_addr));
132			if (sscanf(buffer, "%*c %s", temp) == EOF)
133			continue;
134
135			if (!current_list->head)
136			current_list->head = new_addr;
137			else
138			current_addr->next = new_addr;
139			current_addr = new_addr;
140			current_addr->next = NULL;
141
142			current_addr->preg = (regex_t *) malloc (sizeof (regex_t));
143			if (regcomp (current_addr->preg, temp, REG_EXTENDED\|REG_NOSUB) != 0)
144			{
145			eventlog(eventlog_level_error,__FUNCTION__,"Compile regular expression pattern failed %s",temp);
146			free (current_addr->preg);
147			serve_scope_list_unload();
148			return -3;
149			}
150			current_addr->deny = (buffer[0]=='~');
151
152			break;
153			}
154			}
155
156	sysadm	1.2	fclose(fp);
157
158	sysadm	1.1	return 0;
159			}
160
161			extern void serve_scope_list_unload(void)
162			{
163			struct serve_scope_addr_list *current_list;
164			struct serve_scope_addr *current_addr;
165
166			while(serve_scope_list)
167			{
168			current_list = serve_scope_list;
169			serve_scope_list = serve_scope_list->next;
170			while(current_list->head)
171			{
172			current_addr = current_list->head;
173			current_list->head = current_list->head->next;
174			regfree(current_addr->preg);
175			free(current_addr->preg);
176			free(current_addr);
177			}
178			free(current_list);
179			}
180			}
181
182			extern int serve_scope_list_reload(const char *filename)
183			{
184			serve_scope_list_unload();
185			return serve_scope_list_load(filename);
186			}
187
188			extern int serve_scope_list_validate(unsigned int ip, t_connection *c)
189			{
190			struct serve_scope_addr_list *current_list;
191			struct serve_scope_addr *current_addr;
192			regmatch_t pmatch[10];
193
194			struct sockaddr_in tsa;
195
196			memset(&tsa,0,sizeof(tsa));
197			tsa.sin_family = PSOCK_AF_INET;
198			tsa.sin_port = htons((unsigned short)0);
199			tsa.sin_addr.s_addr = htonl(c->addr);
200
201			current_list = serve_scope_list;
202			while(current_list)
203			{
204			if (current_list->ip == ip)
205			{
206			current_addr = current_list->head;
207			while(current_addr)
208			{
209			if (!regexec (current_addr->preg, inet_ntoa(tsa.sin_addr), 0, pmatch, 0))
210			return current_addr->deny; // Match
211			current_addr = current_addr->next;
212			}
213			return 1; // No match serve scope
214			}
215			current_list = current_list->next;
216			}
217
218			return 0; // No match game server
219			}
220
221			/* End */
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