2 * Copyright (c) 2005 William Pitcock <nenolod -at- nenolod.net>
3 * and Jilles Tjoelker <jilles -at- stack.nl>
6 * Redistribution in both source and binary forms are permitted
7 * provided that the above copyright notice remains unchanged.
9 * m_chghost.c: A module for handling spoofing dynamically.
21 #include "s_newconf.h"
28 #include "sprintf_irc.h"
32 static int me_realhost(struct Client
*, struct Client
*, int, const char **);
33 static int ms_chghost(struct Client
*, struct Client
*, int, const char **);
34 static int me_chghost(struct Client
*, struct Client
*, int, const char **);
35 static int mo_chghost(struct Client
*, struct Client
*, int, const char **);
37 struct Message realhost_msgtab
= {
38 "REALHOST", 0, 0, 0, MFLG_SLOW
,
39 {mg_ignore
, mg_ignore
, mg_ignore
, mg_ignore
, {me_realhost
, 2}, mg_ignore
}
42 struct Message chghost_msgtab
= {
43 "CHGHOST", 0, 0, 0, MFLG_SLOW
,
44 {mg_ignore
, mg_not_oper
, {ms_chghost
, 3}, {ms_chghost
, 3}, {me_chghost
, 3}, {mo_chghost
, 3}}
47 mapi_clist_av1 chghost_clist
[] = { &chghost_msgtab
, &realhost_msgtab
, NULL
};
49 DECLARE_MODULE_AV1(chghost
, NULL
, NULL
, chghost_clist
, NULL
, NULL
, "$Revision: 3424 $");
53 * input - host to check
54 * output - 0 if erroneous, else 0
58 clean_host(const char *host
)
62 if (*host
== '\0' || *host
== ':')
69 if(!IsHostChar(*host
))
84 * Yes this contains a little race condition if someone does a whois
85 * in between the UID and REALHOST and use_whois_actually is enabled.
86 * I don't think that's a big problem as the whole thing is a
90 me_realhost(struct Client
*client_p
, struct Client
*source_p
,
91 int parc
, const char *parv
[])
93 if (!IsPerson(source_p
))
96 del_from_hostname_hash(source_p
->orighost
, source_p
);
97 strlcpy(source_p
->orighost
, parv
[1], sizeof source_p
->orighost
);
98 if (irccmp(source_p
->host
, source_p
->orighost
))
99 SetDynSpoof(source_p
);
101 ClearDynSpoof(source_p
);
102 add_to_hostname_hash(source_p
->orighost
, source_p
);
107 do_chghost(struct Client
*source_p
, struct Client
*target_p
,
108 const char *newhost
, int is_encap
)
110 if (!clean_host(newhost
))
112 sendto_realops_snomask(SNO_GENERAL
, is_encap
? L_ALL
: L_NETWIDE
, "%s attempted to change hostname for %s to %s (invalid)",
113 IsServer(source_p
) ? source_p
->name
: get_oper_name(source_p
),
114 target_p
->name
, newhost
);
115 /* sending this remotely may disclose important
116 * routing information -- jilles */
117 if (is_encap
? MyClient(target_p
) : !ConfigServerHide
.flatten_links
)
118 sendto_one_notice(target_p
, ":*** Notice -- %s attempted to change your hostname to %s (invalid)",
119 source_p
->name
, newhost
);
122 change_nick_user_host(target_p
, target_p
->name
, target_p
->username
, newhost
, 0, "Changing host");
123 if (irccmp(target_p
->host
, target_p
->orighost
))
125 SetDynSpoof(target_p
);
126 if (MyClient(target_p
))
127 sendto_one_numeric(target_p
, RPL_HOSTHIDDEN
, "%s :is now your hidden host (set by %s)", target_p
->host
, source_p
->name
);
131 ClearDynSpoof(target_p
);
132 if (MyClient(target_p
))
133 sendto_one_numeric(target_p
, RPL_HOSTHIDDEN
, "%s :hostname reset by %s", target_p
->host
, source_p
->name
);
135 if (MyClient(source_p
))
136 sendto_one_notice(source_p
, ":Changed hostname for %s to %s", target_p
->name
, target_p
->host
);
137 if (!IsServer(source_p
) && !IsService(source_p
))
138 sendto_realops_snomask(SNO_GENERAL
, L_ALL
, "%s changed hostname for %s to %s", get_oper_name(source_p
), target_p
->name
, target_p
->host
);
149 ms_chghost(struct Client
*client_p
, struct Client
*source_p
,
150 int parc
, const char *parv
[])
152 struct Client
*target_p
;
154 if (!(target_p
= find_person(parv
[1])))
157 if (do_chghost(source_p
, target_p
, parv
[2], 0))
159 sendto_server(client_p
, NULL
,
160 CAP_EUID
| CAP_TS6
, NOCAPS
, ":%s CHGHOST %s %s",
161 use_id(source_p
), use_id(target_p
), parv
[2]);
162 sendto_server(client_p
, NULL
,
163 CAP_TS6
, CAP_EUID
, ":%s ENCAP * CHGHOST %s :%s",
164 use_id(source_p
), use_id(target_p
), parv
[2]);
165 sendto_server(client_p
, NULL
,
166 NOCAPS
, CAP_TS6
, ":%s ENCAP * CHGHOST %s :%s",
167 source_p
->name
, target_p
->name
, parv
[2]);
180 me_chghost(struct Client
*client_p
, struct Client
*source_p
,
181 int parc
, const char *parv
[])
183 struct Client
*target_p
;
185 if (!(target_p
= find_person(parv
[1])))
188 do_chghost(source_p
, target_p
, parv
[2], 1);
199 /* Disable this because of the abuse potential -- jilles
200 * No, make it toggleable via ./configure. --nenolod
203 mo_chghost(struct Client
*client_p
, struct Client
*source_p
,
204 int parc
, const char *parv
[])
206 #ifdef ENABLE_OPER_CHGHOST
207 struct Client
*target_p
;
209 if(!IsOperAdmin(source_p
))
211 sendto_one(source_p
, form_str(ERR_NOPRIVS
),
212 me
.name
, source_p
->name
, "admin");
216 if (!(target_p
= find_named_person(parv
[1])))
218 sendto_one_numeric(source_p
, ERR_NOSUCHNICK
,
219 form_str(ERR_NOSUCHNICK
), parv
[1]);
223 if (!clean_host(parv
[2]))
225 sendto_one_notice(source_p
, ":Hostname %s is invalid", parv
[2]);
229 do_chghost(source_p
, target_p
, parv
[2], 0);
231 sendto_server(NULL
, NULL
,
232 CAP_EUID
| CAP_TS6
, NOCAPS
, ":%s CHGHOST %s %s",
233 use_id(source_p
), use_id(target_p
), parv
[2]);
234 sendto_server(NULL
, NULL
,
235 CAP_TS6
, CAP_EUID
, ":%s ENCAP * CHGHOST %s :%s",
236 use_id(source_p
), use_id(target_p
), parv
[2]);
237 sendto_server(NULL
, NULL
,
238 NOCAPS
, CAP_TS6
, ":%s ENCAP * CHGHOST %s :%s",
239 source_p
->name
, target_p
->name
, parv
[2]);
241 sendto_one_numeric(source_p
, ERR_DISABLED
, form_str(ERR_DISABLED
),