server/server/ban.C

/*
 * Ban.c
 * Code was grabbed from the netrek source and modified to work with
 * crossfire. This function checks a file in the lib directory for any
 * banned players. If it finds one it returns a 1. Wildcards can be used.
 */

#include <global.h>
#include <sproto.h>
#include <sys/ioctl.h>
#ifdef hpux
# include <sys/ptyio.h>
#endif

#include <errno.h>
#include <stdio.h>
#include <sys/file.h>

/**
 * Check if a player and/or host is banned.
 *
 * @param login the player name to check; NULL to check only the host name
 *
 * @param host the host name to check
 *
 * @return 1=player/host is banned; 0=player/host is not banned
 */
int
checkbanned (const char *login, const char *host)
{
  FILE *bannedfile;
  char buf[MAX_BUF];
  char log_buf0[160], host_buf[64], line_buf[160];
  char *indexpos;
  int num1;
  int hits = 0;                 /* Hits==2 means we're banned */
  int loop;

  /* Inverse ban feature: if a line is prefixed by a ~, then we will
   * immediately return "check passed" if it matches. This allow to ban a
   * network, but let a part of it still connect.
   */
  int inverse_ban = 0;

  for (loop = 0; loop < 2; loop++)
    {                           /* have to check both ban files now */

      /* First time through look for BANFILE */

      if (loop == 0)
        {
          sprintf (buf, "%s/%s", settings.confdir, BANFILE);
          bannedfile = fopen (buf, "r");
          if (bannedfile == NULL)
            {
              LOG (llevDebug, "Could not find file Banned file\n");
              loop++;
            }
        }

      /* Second time through look for BANISHFILE */

      if (loop == 1)
        {
          sprintf (buf, "%s/%s", settings.localdir, BANISHFILE);
          bannedfile = fopen (buf, "r");
          if (bannedfile == NULL)
            {
              LOG (llevDebug, "Could not find file Banish file\n");
              return (0);
            }
        }

      /* Do the actual work here checking for banned IPs */

      while (fgets (line_buf, 160, bannedfile) != NULL)
        {
          char *log_buf = log_buf0;

          inverse_ban = 0;
          hits = 0;

          /* Split line up */
          if (*line_buf == '#' || *line_buf == '\n')
            continue;

          indexpos = strrchr (line_buf, '@');
          if (indexpos == NULL)
            {
              LOG (llevDebug, "Bad line in banned file\n");
              continue;
            }

          /* copy login name into log_buf */
          num1 = indexpos - line_buf;
          assign (log_buf, line_buf, num1);

          /* copy host name into host_buf */
          assign (host_buf, indexpos + 1);

          /* Cut off any extra spaces on the host buffer */
          indexpos = host_buf;
          while (!isspace (*indexpos))
            indexpos++;

          *indexpos = '\0';

          if (*log_buf == '~')
            {
              log_buf++;
              inverse_ban = 1;
            }

          /*
             LOG(llevDebug, "Login: <%s>; host: <%s>\n", login, host);
             LOG(llevDebug, "    Checking Banned <%s> and <%s>.\n", log_buf, host_buf);
           */

          if (*log_buf == '*')
            hits = 1;
          else if (login != NULL && strcmp (login, log_buf) == 0)
            hits = 1;

          if (hits == 1)
            {
              if (*host_buf == '*')
                {               /* Lock out any host */
                  hits++;

                  /* break out now. otherwise hits will get reset to one */
                  break;
                }
              else if (strstr (host, host_buf) != NULL)
                {               /* Lock out subdomains (eg, "*@usc.edu" */
                  hits++;

                  /* break out now. otherwise hits will get reset to one */
                  break;
                }
              else if (strcmp (host, host_buf) == 0)
                {               /* Lock out specific host */
                  hits++;

                  /* break out now. otherwise hits will get reset to one */
                  break;
                }
            }
        }
      fclose (bannedfile);

      if (hits >= 2)
        {
          return (!inverse_ban);
        }

      loop++;
    }

  return (0);
}
Revision:	1.5
Committed:	Mon Dec 11 19:46:46 2006 UTC (17 years, 5 months ago) by pippijn
Content type:	text/plain
Branch:	MAIN
Changes since 1.4:	+4 -8 lines
Log Message:	removed #ifn?def WIN32 from all files
#	User	Rev	Content
1	elmex	1.1	/*
2			* Ban.c
3			* Code was grabbed from the netrek source and modified to work with
4			* crossfire. This function checks a file in the lib directory for any
5			* banned players. If it finds one it returns a 1. Wildcards can be used.
6			*/
7
8			#include <global.h>
9			#include <sproto.h>
10	pippijn	1.5	#include <sys/ioctl.h>
11	elmex	1.1	#ifdef hpux
12	root	1.2	# include <sys/ptyio.h>
13	elmex	1.1	#endif
14
15	pippijn	1.5	#include <errno.h>
16			#include <stdio.h>
17			#include <sys/file.h>
18	elmex	1.1
19			/**
20			* Check if a player and/or host is banned.
21			*
22			* @param login the player name to check; NULL to check only the host name
23			*
24			* @param host the host name to check
25			*
26			* @return 1=player/host is banned; 0=player/host is not banned
27			*/
28	root	1.2	int
29			checkbanned (const char login, const char host)
30	elmex	1.1	{
31	root	1.2	FILE *bannedfile;
32			char buf[MAX_BUF];
33			char log_buf0[160], host_buf[64], line_buf[160];
34			char *indexpos;
35			int num1;
36			int hits = 0; /* Hits==2 means we're banned */
37			int loop;
38
39			/* Inverse ban feature: if a line is prefixed by a ~, then we will
40			* immediately return "check passed" if it matches. This allow to ban a
41			* network, but let a part of it still connect.
42			*/
43			int inverse_ban = 0;
44
45			for (loop = 0; loop < 2; loop++)
46			{ /* have to check both ban files now */
47
48			/* First time through look for BANFILE */
49
50			if (loop == 0)
51			{
52			sprintf (buf, "%s/%s", settings.confdir, BANFILE);
53			bannedfile = fopen (buf, "r");
54			if (bannedfile == NULL)
55			{
56			LOG (llevDebug, "Could not find file Banned file\n");
57			loop++;
58	elmex	1.1	}
59			}
60
61	root	1.2	/* Second time through look for BANISHFILE */
62	elmex	1.1
63	root	1.2	if (loop == 1)
64			{
65			sprintf (buf, "%s/%s", settings.localdir, BANISHFILE);
66			bannedfile = fopen (buf, "r");
67			if (bannedfile == NULL)
68			{
69			LOG (llevDebug, "Could not find file Banish file\n");
70			return (0);
71	elmex	1.1	}
72			}
73
74	root	1.2	/* Do the actual work here checking for banned IPs */
75	elmex	1.1
76	root	1.2	while (fgets (line_buf, 160, bannedfile) != NULL)
77			{
78			char *log_buf = log_buf0;
79
80			inverse_ban = 0;
81			hits = 0;
82
83			/* Split line up */
84			if (line_buf == '#' \|\| line_buf == '\n')
85			continue;
86
87			indexpos = strrchr (line_buf, '@');
88			if (indexpos == NULL)
89			{
90			LOG (llevDebug, "Bad line in banned file\n");
91			continue;
92			}
93
94			/* copy login name into log_buf */
95			num1 = indexpos - line_buf;
96	root	1.3	assign (log_buf, line_buf, num1);
97	root	1.2
98			/* copy host name into host_buf */
99	root	1.3	assign (host_buf, indexpos + 1);
100	root	1.2
101			/* Cut off any extra spaces on the host buffer */
102			indexpos = host_buf;
103			while (!isspace (*indexpos))
104	root	1.3	indexpos++;
105
106	root	1.2	*indexpos = '\0';
107
108			if (*log_buf == '~')
109			{
110			log_buf++;
111			inverse_ban = 1;
112			}
113
114			/*
115			LOG(llevDebug, "Login: <%s>; host: <%s>\n", login, host);
116			LOG(llevDebug, " Checking Banned <%s> and <%s>.\n", log_buf, host_buf);
117			*/
118
119			if (log_buf == '')
120			hits = 1;
121			else if (login != NULL && strcmp (login, log_buf) == 0)
122			hits = 1;
123
124			if (hits == 1)
125			{
126			if (host_buf == '')
127			{ /* Lock out any host */
128			hits++;
129	elmex	1.1
130	root	1.2	/* break out now. otherwise hits will get reset to one */
131			break;
132	elmex	1.1	}
133	root	1.2	else if (strstr (host, host_buf) != NULL)
134			{ /* Lock out subdomains (eg, "@usc.edu" /
135			hits++;
136	elmex	1.1
137	root	1.2	/* break out now. otherwise hits will get reset to one */
138			break;
139	elmex	1.1	}
140	root	1.2	else if (strcmp (host, host_buf) == 0)
141			{ /* Lock out specific host */
142			hits++;
143	elmex	1.1
144	root	1.2	/* break out now. otherwise hits will get reset to one */
145			break;
146	elmex	1.1	}
147			}
148			}
149	root	1.2	fclose (bannedfile);
150	elmex	1.1
151	root	1.2	if (hits >= 2)
152			{
153			return (!inverse_ban);
154	elmex	1.1	}
155
156	root	1.2	loop++;
157	elmex	1.1	}
158
159	root	1.2	return (0);
160	elmex	1.1	}