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.
23 #include "s_newconf.h"
30 #include "sprintf_irc.h"
34 static int me_realhost(struct Client
*, struct Client
*, int, const char **);
35 static int ms_chghost(struct Client
*, struct Client
*, int, const char **);
36 static int me_chghost(struct Client
*, struct Client
*, int, const char **);
37 static int mo_chghost(struct Client
*, struct Client
*, int, const char **);
39 struct Message realhost_msgtab
= {
40 "REALHOST", 0, 0, 0, MFLG_SLOW
,
41 {mg_ignore
, mg_ignore
, mg_ignore
, mg_ignore
, {me_realhost
, 2}, mg_ignore
}
44 struct Message chghost_msgtab
= {
45 "CHGHOST", 0, 0, 0, MFLG_SLOW
,
46 {mg_ignore
, mg_not_oper
, {ms_chghost
, 3}, {ms_chghost
, 3}, {me_chghost
, 3}, {mo_chghost
, 3}}
49 mapi_clist_av1 chghost_clist
[] = { &chghost_msgtab
, &realhost_msgtab
, NULL
};
51 DECLARE_MODULE_AV1(chghost
, NULL
, NULL
, chghost_clist
, NULL
, NULL
, "$Revision: 3424 $");
55 * input - host to check
56 * output - 0 if erroneous, else 0
60 clean_host(const char *host
)
64 if (*host
== '\0' || *host
== ':')
71 if(!IsHostChar(*host
))
86 * Yes this contains a little race condition if someone does a whois
87 * in between the UID and REALHOST and use_whois_actually is enabled.
88 * I don't think that's a big problem as the whole thing is a
92 me_realhost(struct Client
*client_p
, struct Client
*source_p
,
93 int parc
, const char *parv
[])
95 if (!IsPerson(source_p
))
98 del_from_hostname_hash(source_p
->orighost
, source_p
);
99 strlcpy(source_p
->orighost
, parv
[1], sizeof source_p
->orighost
);
100 if (irccmp(source_p
->host
, source_p
->orighost
))
101 SetDynSpoof(source_p
);
103 ClearDynSpoof(source_p
);
104 add_to_hostname_hash(source_p
->orighost
, source_p
);
109 do_chghost(struct Client
*source_p
, struct Client
*target_p
,
110 const char *newhost
, int is_encap
)
112 if (!clean_host(newhost
))
114 sendto_realops_snomask(SNO_GENERAL
, is_encap
? L_ALL
: L_NETWIDE
, "%s attempted to change hostname for %s to %s (invalid)",
115 IsServer(source_p
) ? source_p
->name
: get_oper_name(source_p
),
116 target_p
->name
, newhost
);
117 /* sending this remotely may disclose important
118 * routing information -- jilles */
119 if (is_encap
? MyClient(target_p
) : !ConfigServerHide
.flatten_links
)
120 sendto_one_notice(target_p
, ":*** Notice -- %s attempted to change your hostname to %s (invalid)",
121 source_p
->name
, newhost
);
124 change_nick_user_host(target_p
, target_p
->name
, target_p
->username
, newhost
, 0, "Changing host");
125 if (irccmp(target_p
->host
, target_p
->orighost
))
127 SetDynSpoof(target_p
);
128 if (MyClient(target_p
))
129 sendto_one_numeric(target_p
, RPL_HOSTHIDDEN
, "%s :is now your hidden host (set by %s)", target_p
->host
, source_p
->name
);
133 ClearDynSpoof(target_p
);
134 if (MyClient(target_p
))
135 sendto_one_numeric(target_p
, RPL_HOSTHIDDEN
, "%s :hostname reset by %s", target_p
->host
, source_p
->name
);
137 if (MyClient(source_p
))
138 sendto_one_notice(source_p
, ":Changed hostname for %s to %s", target_p
->name
, target_p
->host
);
139 if (!IsServer(source_p
) && !IsService(source_p
))
140 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
);
151 ms_chghost(struct Client
*client_p
, struct Client
*source_p
,
152 int parc
, const char *parv
[])
154 struct Client
*target_p
;
156 if (!(target_p
= find_person(parv
[1])))
159 if (do_chghost(source_p
, target_p
, parv
[2], 0))
161 sendto_server(client_p
, NULL
,
162 CAP_EUID
| CAP_TS6
, NOCAPS
, ":%s CHGHOST %s %s",
163 use_id(source_p
), use_id(target_p
), parv
[2]);
164 sendto_server(client_p
, NULL
,
165 CAP_TS6
, CAP_EUID
, ":%s ENCAP * CHGHOST %s :%s",
166 use_id(source_p
), use_id(target_p
), parv
[2]);
167 sendto_server(client_p
, NULL
,
168 NOCAPS
, CAP_TS6
, ":%s ENCAP * CHGHOST %s :%s",
169 source_p
->name
, target_p
->name
, parv
[2]);
182 me_chghost(struct Client
*client_p
, struct Client
*source_p
,
183 int parc
, const char *parv
[])
185 struct Client
*target_p
;
187 if (!(target_p
= find_person(parv
[1])))
190 do_chghost(source_p
, target_p
, parv
[2], 1);
201 /* Disable this because of the abuse potential -- jilles
202 * No, make it toggleable via ./configure. --nenolod
205 mo_chghost(struct Client
*client_p
, struct Client
*source_p
,
206 int parc
, const char *parv
[])
208 #ifdef ENABLE_OPER_CHGHOST
209 struct Client
*target_p
;
211 if(!IsOperAdmin(source_p
))
213 sendto_one(source_p
, form_str(ERR_NOPRIVS
),
214 me
.name
, source_p
->name
, "admin");
218 if (!(target_p
= find_named_person(parv
[1])))
220 sendto_one_numeric(source_p
, ERR_NOSUCHNICK
,
221 form_str(ERR_NOSUCHNICK
), parv
[1]);
225 if (!clean_host(parv
[2]))
227 sendto_one_notice(source_p
, ":Hostname %s is invalid", parv
[2]);
231 do_chghost(source_p
, target_p
, parv
[2], 0);
233 sendto_server(NULL
, NULL
,
234 CAP_EUID
| CAP_TS6
, NOCAPS
, ":%s CHGHOST %s %s",
235 use_id(source_p
), use_id(target_p
), parv
[2]);
236 sendto_server(NULL
, NULL
,
237 CAP_TS6
, CAP_EUID
, ":%s ENCAP * CHGHOST %s :%s",
238 use_id(source_p
), use_id(target_p
), parv
[2]);
239 sendto_server(NULL
, NULL
,
240 NOCAPS
, CAP_TS6
, ":%s ENCAP * CHGHOST %s :%s",
241 source_p
->name
, target_p
->name
, parv
[2]);
243 sendto_one_notice(source_p
, ":CHGHOST is disabled");