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0ba1da59 EM |
1 | /* |
2 | * Solanum: a slightly advanced ircd | |
3 | * chm_regmsg: require identification to chat (+R mode). | |
4 | * | |
5 | * Copyright (c) 2020 Eric Mertens <emertens@gmail.com> | |
6 | * | |
7 | * Permission to use, copy, modify, and/or distribute this software for any | |
8 | * purpose with or without fee is hereby granted, provided that the above | |
9 | * copyright notice and this permission notice is present in all copies. | |
10 | * | |
11 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
12 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
13 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
14 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, | |
15 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
16 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
17 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
18 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
19 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
20 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
21 | * POSSIBILITY OF SUCH DAMAGE. | |
22 | */ | |
23 | ||
24 | #include "stdinc.h" | |
25 | #include "modules.h" | |
26 | #include "hook.h" | |
27 | #include "client.h" | |
28 | #include "ircd.h" | |
29 | #include "logger.h" | |
30 | #include "send.h" | |
31 | #include "s_conf.h" | |
32 | #include "s_user.h" | |
33 | #include "s_serv.h" | |
34 | #include "numeric.h" | |
35 | #include "chmode.h" | |
36 | #include "inline/stringops.h" | |
37 | ||
38 | static const char chm_regmsg_desc[] = | |
0ea108fc | 39 | "Adds channel mode +R, which blocks messages from unregistered users"; |
0ba1da59 EM |
40 | |
41 | static unsigned int mode_regmsg; | |
42 | ||
8d67f060 SB |
43 | static void hook_privmsg_channel(void *); |
44 | static void hook_can_send(void *); | |
0ba1da59 EM |
45 | |
46 | mapi_hfn_list_av1 chm_regmsg_hfnlist[] = { | |
8d67f060 SB |
47 | { "privmsg_channel", hook_privmsg_channel }, |
48 | { "can_send", hook_can_send }, | |
0ba1da59 EM |
49 | { NULL, NULL } |
50 | }; | |
51 | ||
8d67f060 SB |
52 | static bool |
53 | chm_regmsg_test(struct Client *source_p, struct Channel *chptr) | |
54 | { | |
55 | struct membership *msptr; | |
56 | ||
57 | /* mode is unset, accept */ | |
58 | if (!(chptr->mode.mode & mode_regmsg)) | |
59 | return true; | |
60 | ||
61 | /* user is identified, accept */ | |
62 | if (!EmptyString(source_p->user->suser)) | |
63 | return true; | |
64 | ||
65 | /* voice and op override identification requirement, accept */ | |
66 | msptr = find_channel_membership(chptr, source_p); | |
67 | if (is_chanop_voiced(msptr)) | |
68 | return true; | |
69 | ||
70 | return false; | |
71 | } | |
72 | ||
0ba1da59 | 73 | static void |
8d67f060 | 74 | hook_privmsg_channel(void *data_) |
0ba1da59 EM |
75 | { |
76 | hook_data_privmsg_channel *data = data_; | |
8d67f060 SB |
77 | |
78 | /* Only apply this hook if the channel isn't +z - if it is +z, then the can_send | |
79 | * hook should be used to enable +z to do its job, as an error numeric won't be sent in that case */ | |
80 | if (data->chptr->mode.mode & MODE_OPMODERATE) | |
81 | return; | |
0ba1da59 EM |
82 | |
83 | /* message is already blocked, defer */ | |
84 | if (data->approved) | |
85 | return; | |
86 | ||
8d67f060 | 87 | if (chm_regmsg_test(data->source_p, data->chptr)) |
981a94c3 EM |
88 | return; |
89 | ||
8d67f060 SB |
90 | sendto_one_numeric(data->source_p, ERR_MSGNEEDREGGEDNICK, form_str(ERR_MSGNEEDREGGEDNICK), data->chptr->chname); |
91 | data->approved = ERR_MSGNEEDREGGEDNICK; | |
92 | } | |
93 | ||
94 | static void hook_can_send(void *data_) | |
95 | { | |
96 | hook_data_channel_approval *data = data_; | |
97 | ||
98 | /* Only apply this hook if the channel is +z - if it isn't +z, then the privmsg_channel | |
99 | * hook should be used to enable a custom error numeric to be sent */ | |
100 | if (!(data->chptr->mode.mode & MODE_OPMODERATE)) | |
0ba1da59 EM |
101 | return; |
102 | ||
8d67f060 SB |
103 | /* message is already blocked, defer */ |
104 | if (data->approved == CAN_SEND_NO) | |
0ba1da59 EM |
105 | return; |
106 | ||
8d67f060 SB |
107 | if (chm_regmsg_test(data->client, data->chptr)) |
108 | return; | |
109 | ||
110 | data->approved = CAN_SEND_NO; | |
0ba1da59 EM |
111 | } |
112 | ||
113 | static int | |
114 | _modinit(void) | |
115 | { | |
116 | mode_regmsg = cflag_add('R', chm_simple); | |
117 | if (mode_regmsg == 0) { | |
118 | ierror("chm_regmsg: unable to allocate cmode slot for +R, unloading module"); | |
119 | return -1; | |
120 | } | |
121 | ||
122 | return 0; | |
123 | } | |
124 | ||
125 | static void | |
126 | _moddeinit(void) | |
127 | { | |
128 | cflag_orphan('R'); | |
129 | } | |
130 | ||
131 | DECLARE_MODULE_AV2(chm_regmsg, _modinit, _moddeinit, NULL, NULL, chm_regmsg_hfnlist, NULL, NULL, chm_regmsg_desc); |