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 const char extb_desc[] = "Hostmask ($m) extban type";
  13
  14 static int _modinit(void);
  15 static void _moddeinit(void);
  16 static int eb_hostmask(const char *data, struct Client *client_p, struct Channel *chptr, long mode_type);
  17
  18 DECLARE_MODULE_AV2(extb_hostmask, _modinit, _moddeinit, NULL, NULL, NULL, NULL, NULL, extb_desc);
  19
  20 static int
  21 _modinit(void)
  22 {
  23         extban_table['m'] = eb_hostmask;
  24         return 0;
  25 }
  26
  27 static void
  28 _moddeinit(void)
  29 {
  30         extban_table['m'] = NULL;
  31 }
  32
  33 static int
  34 eb_hostmask(const char *banstr, struct Client *client_p, struct Channel *chptr, long mode_type)
  35 {
  36         char src_host[NICKLEN + USERLEN + HOSTLEN + 6];
  37         char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6];
  38         char src_althost[NICKLEN + USERLEN + HOSTLEN + 6];
  39         char src_ip4host[NICKLEN + USERLEN + HOSTLEN + 6];
  40         struct sockaddr_in ip4;
  41         char *s = src_host, *s2 = src_iphost, *s3 = NULL, *s4 = NULL;
  42
  43         sprintf(src_host, "%s!%s@%s", client_p->name, client_p->username, client_p->host);
  44         sprintf(src_iphost, "%s!%s@%s", client_p->name, client_p->username, client_p->sockhost);
  45
  46         /* handle hostmangling if necessary */
  47         if (client_p->localClient->mangledhost != NULL)
  48         {
  49                 if (!strcmp(client_p->host, client_p->localClient->mangledhost))
  50                         sprintf(src_althost, "%s!%s@%s", client_p->name, client_p->username, client_p->orighost);
  51                 else if (!IsDynSpoof(client_p))
  52                         sprintf(src_althost, "%s!%s@%s", client_p->name, client_p->username, client_p->localClient->mangledhost);
  53
  54                 s3 = src_althost;
  55         }
  56
  57 #ifdef RB_IPV6
  58         /* handle Teredo if necessary */
  59         if (client_p->localClient->ip.ss_family == AF_INET6 && ipv4_from_ipv6((const struct sockaddr_in6 *) &client_p->localClient->ip, &ip4))
  60         {
  61                 sprintf(src_ip4host, "%s!%s@", client_p->name, client_p->username);
  62                 s4 = src_ip4host + strlen(src_ip4host);
  63                 rb_inet_ntop_sock((struct sockaddr *)&ip4,
  64                                 s4, src_ip4host + sizeof src_ip4host - s4);
  65                 s4 = src_ip4host;
  66         }
  67 #endif
  68
  69         return match(banstr, s) || match(banstr, s2) || (s3 != NULL && match(banstr, s3)) || (s4 != NULL && match(banstr, s4)) ? EXTBAN_MATCH : EXTBAN_NOMATCH;
  70 }