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/* |
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* Ban.c |
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* Code was grabbed from the netrek source and modified to work with |
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* crossfire. This function checks a file in the lib directory for any |
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* banned players. If it finds one it returns a 1. Wildcards can be used. |
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*/ |
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|
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#include <global.h> |
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#include <sproto.h> |
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#include <sys/ioctl.h> |
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|
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#include <errno.h> |
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#include <stdio.h> |
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#include <sys/file.h> |
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|
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/** |
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* Check if a player and/or host is banned. |
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* |
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* @param login the player name to check; NULL to check only the host name |
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* |
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* @param host the host name to check |
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* |
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* @return 1=player/host is banned; 0=player/host is not banned |
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*/ |
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int |
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checkbanned (const char *login, const char *host) |
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{ |
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FILE *bannedfile; |
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char buf[MAX_BUF]; |
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char log_buf0[160], host_buf[64], line_buf[160]; |
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char *indexpos; |
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int num1; |
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int hits = 0; /* Hits==2 means we're banned */ |
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int loop; |
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|
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/* Inverse ban feature: if a line is prefixed by a ~, then we will |
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* immediately return "check passed" if it matches. This allow to ban a |
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* network, but let a part of it still connect. |
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*/ |
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int inverse_ban = 0; |
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|
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for (loop = 0; loop < 2; loop++) |
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{ /* have to check both ban files now */ |
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|
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/* First time through look for BANFILE */ |
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|
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if (loop == 0) |
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{ |
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sprintf (buf, "%s/%s", settings.confdir, BANFILE); |
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bannedfile = fopen (buf, "r"); |
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if (bannedfile == NULL) |
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{ |
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LOG (llevDebug, "Could not find file Banned file\n"); |
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loop++; |
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} |
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} |
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|
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/* Second time through look for BANISHFILE */ |
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|
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if (loop == 1) |
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{ |
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sprintf (buf, "%s/%s", settings.localdir, BANISHFILE); |
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bannedfile = fopen (buf, "r"); |
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if (bannedfile == NULL) |
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{ |
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LOG (llevDebug, "Could not find file Banish file\n"); |
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return (0); |
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} |
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} |
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|
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/* Do the actual work here checking for banned IPs */ |
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|
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while (fgets (line_buf, 160, bannedfile) != NULL) |
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{ |
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char *log_buf = log_buf0; |
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|
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inverse_ban = 0; |
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hits = 0; |
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|
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/* Split line up */ |
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if (*line_buf == '#' || *line_buf == '\n') |
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continue; |
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|
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indexpos = strrchr (line_buf, '@'); |
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if (indexpos == NULL) |
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{ |
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LOG (llevDebug, "Bad line in banned file\n"); |
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continue; |
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} |
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|
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/* copy login name into log_buf */ |
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num1 = indexpos - line_buf; |
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assign (log_buf, line_buf, num1); |
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|
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/* copy host name into host_buf */ |
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assign (host_buf, indexpos + 1); |
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|
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/* Cut off any extra spaces on the host buffer */ |
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indexpos = host_buf; |
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while (!isspace (*indexpos)) |
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indexpos++; |
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|
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*indexpos = '\0'; |
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|
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if (*log_buf == '~') |
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{ |
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log_buf++; |
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inverse_ban = 1; |
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} |
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|
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/* |
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LOG(llevDebug, "Login: <%s>; host: <%s>\n", login, host); |
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LOG(llevDebug, " Checking Banned <%s> and <%s>.\n", log_buf, host_buf); |
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*/ |
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|
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if (*log_buf == '*') |
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hits = 1; |
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else if (login != NULL && strcmp (login, log_buf) == 0) |
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hits = 1; |
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|
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if (hits == 1) |
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{ |
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if (*host_buf == '*') |
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{ /* Lock out any host */ |
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hits++; |
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|
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/* break out now. otherwise hits will get reset to one */ |
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break; |
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} |
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else if (strstr (host, host_buf) != NULL) |
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{ /* Lock out subdomains (eg, "*@usc.edu" */ |
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hits++; |
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|
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/* break out now. otherwise hits will get reset to one */ |
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break; |
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} |
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else if (strcmp (host, host_buf) == 0) |
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{ /* Lock out specific host */ |
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hits++; |
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|
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/* break out now. otherwise hits will get reset to one */ |
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break; |
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} |
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} |
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} |
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fclose (bannedfile); |
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|
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if (hits >= 2) |
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{ |
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return (!inverse_ban); |
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} |
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|
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loop++; |
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} |
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|
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return (0); |
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} |
