extensions/extb_hostmask.c

   1 /*
   2  * Hostmask extban type: bans all users matching a given hostmask, used for stacked extbans
   3  * -- kaniini
   4  */
   5
   6 #include "stdinc.h"
   7 #include "modules.h"
   8 #include "client.h"
   9 #include "ircd.h"
  10 #include "ipv4_from_ipv6.h"
  11
  12 static int _modinit(void);
  13 static void _moddeinit(void);
  14 static int eb_hostmask(const char *data, struct Client *client_p, struct Channel *chptr, long mode_type);
  15
  16 DECLARE_MODULE_AV1(extb_hostmask, _modinit, _moddeinit, NULL, NULL, NULL, "$Revision: 1299 $");
  17
  18 static int
  19 _modinit(void)
  20 {
  21         extban_table['m'] = eb_hostmask;
  22         return 0;
  23 }
  24
  25 static void
  26 _moddeinit(void)
  27 {
  28         extban_table['m'] = NULL;
  29 }
  30
  31 static int
  32 eb_hostmask(const char *banstr, struct Client *client_p, struct Channel *chptr, long mode_type)
  33 {
  34         char src_host[NICKLEN + USERLEN + HOSTLEN + 6];
  35         char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6];
  36         char src_althost[NICKLEN + USERLEN + HOSTLEN + 6];
  37         char src_ip4host[NICKLEN + USERLEN + HOSTLEN + 6];
  38         struct sockaddr_in ip4;
  39         char *s = src_host, *s2 = src_iphost, *s3 = NULL, *s4 = NULL;
  40
  41         rb_sprintf(src_host, "%s!%s@%s", client_p->name, client_p->username, client_p->host);
  42         rb_sprintf(src_iphost, "%s!%s@%s", client_p->name, client_p->username, client_p->sockhost);
  43
  44         /* handle hostmangling if necessary */
  45         if (client_p->localClient->mangledhost != NULL)
  46         {
  47                 if (!strcmp(client_p->host, client_p->localClient->mangledhost))
  48                         rb_sprintf(src_althost, "%s!%s@%s", client_p->name, client_p->username, client_p->orighost);
  49                 else if (!IsDynSpoof(client_p))
  50                         rb_sprintf(src_althost, "%s!%s@%s", client_p->name, client_p->username, client_p->localClient->mangledhost);
  51
  52                 s3 = src_althost;
  53         }
  54
  55 #ifdef RB_IPV6
  56         /* handle Teredo if necessary */
  57         if (client_p->localClient->ip.ss_family == AF_INET6 && ipv4_from_ipv6((const struct sockaddr_in6 *) &client_p->localClient->ip, &ip4))
  58         {
  59                 rb_sprintf(src_ip4host, "%s!%s@", client_p->name, client_p->username);
  60                 s4 = src_ip4host + strlen(src_ip4host);
  61                 rb_inet_ntop_sock((struct sockaddr *)&ip4,
  62                                 s4, src_ip4host + sizeof src_ip4host - s4);
  63                 s4 = src_ip4host;
  64         }
  65 #endif
  66
  67         return match(banstr, s) || match(banstr, s2) || (s3 != NULL && match(banstr, s3)) || (s4 != NULL && match(banstr, s4)) ? EXTBAN_MATCH : EXTBAN_NOMATCH;
  68 }
  69