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1/*
2 * Helpops system.
3 * -- kaniini
4 */
5
6#include "stdinc.h"
7#include "modules.h"
8#include "client.h"
9#include "hook.h"
10#include "ircd.h"
11#include "send.h"
12#include "s_conf.h"
13#include "s_user.h"
14#include "s_newconf.h"
15#include "numeric.h"
16
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17static const char helpops_desc[] = "The helpops system as used by freenode";
18
4d21f1e8 19static rb_dlink_list helper_list = { NULL, NULL, 0 };
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20static void h_hdl_stats_request(void *hdata);
21static void h_hdl_new_remote_user(void *client_p);
22static void h_hdl_client_exit(void *hdata);
23static void h_hdl_umode_changed(void *hdata);
24static void h_hdl_whois(void *hdata);
4d3f8ead 25static void recurse_client_exit(struct Client *client_p);
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26static void helper_add(struct Client *client_p);
27static void helper_delete(struct Client *client_p);
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28static void mo_dehelper(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
29static void me_dehelper(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
30static void do_dehelper(struct Client *source_p, struct Client *target_p);
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31
32mapi_hfn_list_av1 helpops_hfnlist[] = {
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33 { "doing_stats", h_hdl_stats_request },
34 { "new_remote_user", h_hdl_new_remote_user },
35 { "client_exit", h_hdl_client_exit },
36 { "umode_changed", h_hdl_umode_changed },
37 { "doing_whois", h_hdl_whois },
38 { "doing_whois_global", h_hdl_whois },
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39 { NULL, NULL }
40};
41
0f8ec938 42#define UMODECHAR_HELPOPS 'h'
4d21f1e8 43
161ac1c8 44struct Message dehelper_msgtab = {
7baa37a9 45 "DEHELPER", 0, 0, 0, 0,
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46 {mg_unreg, mg_not_oper, mg_not_oper, mg_ignore, {me_dehelper, 2}, {mo_dehelper, 2}}
47};
48
49mapi_clist_av1 helpops_clist[] = { &dehelper_msgtab, NULL };
50
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51static void
52mo_dehelper(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char **parv)
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53{
54 struct Client *target_p;
55
4a4b2095 56 if (!HasPrivilege(source_p, "oper:dehelper"))
161ac1c8 57 {
4a4b2095 58 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "dehelper");
3c7d6fcc 59 return;
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60 }
61
62 if(!(target_p = find_named_person(parv[1])))
63 {
64 sendto_one_numeric(source_p, ERR_NOSUCHNICK, form_str(ERR_NOSUCHNICK), parv[1]);
3c7d6fcc 65 return;
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66 }
67
68 if(MyClient(target_p))
69 do_dehelper(source_p, target_p);
70 else
71 sendto_one(target_p, ":%s ENCAP %s DEHELPER %s",
72 use_id(source_p), target_p->servptr->name, use_id(target_p));
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73}
74
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75static void
76me_dehelper(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char **parv)
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77{
78 struct Client *target_p = find_person(parv[1]);
79 if(!target_p)
80 {
81 sendto_one_numeric(source_p, ERR_NOSUCHNICK, form_str(ERR_NOSUCHNICK), parv[1]);
3c7d6fcc 82 return;
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83 }
84 if(!MyClient(target_p))
3c7d6fcc 85 return;
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86
87 do_dehelper(source_p, target_p);
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88}
89
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90static void
91do_dehelper(struct Client *source_p, struct Client *target_p)
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92{
93 const char *fakeparv[4];
0f8ec938 94 static const char minus_helpops[3] = {'-', UMODECHAR_HELPOPS, '\0'};
161ac1c8 95
6c639159 96 if(!(target_p->umodes & user_modes[UMODECHAR_HELPOPS]))
3c7d6fcc 97 return;
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98
99 sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "%s is using DEHELPER on %s",
100 source_p->name, target_p->name);
101 sendto_one_notice(target_p, ":*** %s is using DEHELPER on you", source_p->name);
102
103 fakeparv[0] = fakeparv[1] = target_p->name;
0f8ec938 104 fakeparv[2] = minus_helpops;
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105 fakeparv[3] = NULL;
106 user_mode(target_p, target_p, 3, fakeparv);
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107}
108
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109static int
110_modinit(void)
111{
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112 rb_dlink_node *ptr;
113
6c639159 114 user_modes[UMODECHAR_HELPOPS] = find_umode_slot();
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115 construct_umodebuf();
116
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117 RB_DLINK_FOREACH (ptr, global_client_list.head)
118 {
119 struct Client *client_p = ptr->data;
120 if (IsPerson(client_p) && (client_p->umodes & user_modes[UMODECHAR_HELPOPS]))
121 helper_add(client_p);
122 }
123
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124 return 0;
125}
126
127static void
128_moddeinit(void)
129{
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130 rb_dlink_node *n, *tn;
131
6c639159 132 user_modes[UMODECHAR_HELPOPS] = 0;
4d21f1e8 133 construct_umodebuf();
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134
135 RB_DLINK_FOREACH_SAFE(n, tn, helper_list.head)
136 rb_dlinkDestroy(n, &helper_list);
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137}
138
139static void
82436efb 140h_hdl_stats_request(void *data)
4d21f1e8 141{
82436efb 142 hook_data_int *hdata = data;
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143 struct Client *target_p;
144 rb_dlink_node *helper_ptr;
145 unsigned int count = 0;
146
147 if (hdata->arg2 != 'p')
148 return;
149
150 RB_DLINK_FOREACH (helper_ptr, helper_list.head)
151 {
152 target_p = helper_ptr->data;
153
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154 if(target_p->user->away)
155 continue;
156
157 count++;
158
159 sendto_one_numeric(hdata->client, RPL_STATSDEBUG,
160 "p :%s (%s@%s)",
161 target_p->name, target_p->username,
162 target_p->host);
163 }
164
165 sendto_one_numeric(hdata->client, RPL_STATSDEBUG,
166 "p :%u staff members", count);
167
168 hdata->result = 1;
169}
170
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171static void
172helper_add(struct Client *client_p)
173{
174 if (rb_dlinkFind(client_p, &helper_list) != NULL)
175 return;
176
177 rb_dlinkAddAlloc(client_p, &helper_list);
178}
179
180static void
181helper_delete(struct Client *client_p)
182{
183 rb_dlinkFindDestroy(client_p, &helper_list);
184}
185
4d21f1e8 186static void
82436efb 187h_hdl_new_remote_user(void *data)
4d21f1e8 188{
82436efb 189 struct Client *client_p = data;
6c639159 190 if (client_p->umodes & user_modes[UMODECHAR_HELPOPS])
b1c32af9 191 helper_add(client_p);
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192}
193
194static void
4d3f8ead 195recurse_client_exit(struct Client *client_p)
4d21f1e8 196{
4d3f8ead 197 if (IsPerson(client_p))
8093dc5f 198 {
6c639159 199 if (client_p->umodes & user_modes[UMODECHAR_HELPOPS])
b1c32af9 200 helper_delete(client_p);
8093dc5f 201 }
4d3f8ead 202 else if (IsServer(client_p))
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203 {
204 rb_dlink_node *nptr;
205
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206 RB_DLINK_FOREACH(nptr, client_p->serv->users.head)
207 recurse_client_exit(nptr->data);
8093dc5f 208
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209 RB_DLINK_FOREACH(nptr, client_p->serv->servers.head)
210 recurse_client_exit(nptr->data);
8093dc5f 211 }
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212}
213
4d3f8ead 214static void
82436efb 215h_hdl_client_exit(void *data)
4d3f8ead 216{
82436efb 217 hook_data_client_exit *hdata = data;
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218 recurse_client_exit(hdata->target);
219}
220
4d21f1e8 221static void
82436efb 222h_hdl_umode_changed(void *data)
4d21f1e8 223{
82436efb 224 hook_data_umode_changed *hdata = data;
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225 struct Client *source_p = hdata->client;
226
0f8ec938 227 /* didn't change +h umode, we don't need to do anything */
53390430 228 bool changed = (hdata->oldumodes ^ source_p->umodes) & user_modes[UMODECHAR_HELPOPS];
4d21f1e8 229
6c639159 230 if (source_p->umodes & user_modes[UMODECHAR_HELPOPS])
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231 {
232 if (MyClient(source_p) && !HasPrivilege(source_p, "usermode:helpops"))
233 {
6c639159 234 source_p->umodes &= ~user_modes[UMODECHAR_HELPOPS];
4d21f1e8 235 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "usermode:helpops");
0f8ec938 236 /* they didn't ask for +h so we must be removing it */
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237 if (!changed)
238 helper_delete(source_p);
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239 return;
240 }
241
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242 if (changed)
243 helper_add(source_p);
4d21f1e8 244 }
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245 else if (changed)
246 {
b1c32af9 247 helper_delete(source_p);
53390430 248 }
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249}
250
251static void
82436efb 252h_hdl_whois(void *data)
4d21f1e8 253{
82436efb 254 hook_data_client *hdata = data;
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255 struct Client *source_p = hdata->client;
256 struct Client *target_p = hdata->target;
257
6c639159 258 if ((target_p->umodes & user_modes[UMODECHAR_HELPOPS]) && EmptyString(target_p->user->away))
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259 {
260 sendto_one_numeric(source_p, RPL_WHOISHELPOP, form_str(RPL_WHOISHELPOP), target_p->name);
261 }
262}
263
a278a4fc 264DECLARE_MODULE_AV2(helpops, _modinit, _moddeinit, helpops_clist, NULL, helpops_hfnlist, NULL, NULL, helpops_desc);