modules/m_accept.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_accept.c: Allows a user to talk to a +g user.
   4  *
   5  *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
   6  *  Copyright (C) 1996-2002 Hybrid Development Team
   7  *  Copyright (C) 2002-2005 ircd-ratbox development team
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  22  *  USA
  23  */
  24
  25 #include "stdinc.h"
  26 #include "client.h"
  27 #include "hash.h"
  28 #include "ircd.h"
  29 #include "numeric.h"
  30 #include "s_conf.h"
  31 #include "s_serv.h"
  32 #include "send.h"
  33 #include "msg.h"
  34 #include "parse.h"
  35 #include "modules.h"
  36
  37 static const char accept_desc[] =
  38         "Provides the ACCEPT command for use with Caller ID/user mode +g";
  39
  40 static void m_accept(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  41 static void build_nicklist(struct Client *, char *, char *, const char *);
  42
  43 static void add_accept(struct Client *, struct Client *);
  44 static void list_accepts(struct Client *);
  45
  46 struct Message accept_msgtab = {
  47         "ACCEPT", 0, 0, 0, 0,
  48         {mg_unreg, {m_accept, 2}, mg_ignore, mg_ignore, mg_ignore, {m_accept, 2}}
  49 };
  50
  51 mapi_clist_av1 accept_clist[] = {
  52         &accept_msgtab, NULL
  53 };
  54
  55 DECLARE_MODULE_AV2(accept, NULL, NULL, accept_clist, NULL, NULL, NULL, NULL, accept_desc);
  56
  57 /*
  58  * m_accept - ACCEPT command handler
  59  *      parv[1] = servername
  60  */
  61 static void
  62 m_accept(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  63 {
  64         char *nick;
  65         char *p = NULL;
  66         static char addbuf[BUFSIZE];
  67         static char delbuf[BUFSIZE];
  68         struct Client *target_p;
  69         int accept_num;
  70
  71         if(*parv[1] == '*')
  72         {
  73                 list_accepts(source_p);
  74                 return;
  75         }
  76
  77         build_nicklist(source_p, addbuf, delbuf, parv[1]);
  78
  79         /* parse the delete list */
  80         for (nick = rb_strtok_r(delbuf, ",", &p); nick != NULL; nick = rb_strtok_r(NULL, ",", &p))
  81         {
  82                 /* shouldnt happen, but lets be paranoid */
  83                 if((target_p = find_named_person(nick)) == NULL)
  84                 {
  85                         sendto_one_numeric(source_p, ERR_NOSUCHNICK,
  86                                            form_str(ERR_NOSUCHNICK), nick);
  87                         continue;
  88                 }
  89
  90                 /* user isnt on clients accept list */
  91                 if(!accept_message(target_p, source_p))
  92                 {
  93                         sendto_one(source_p, form_str(ERR_ACCEPTNOT),
  94                                    me.name, source_p->name, target_p->name);
  95                         continue;
  96                 }
  97
  98                 rb_dlinkFindDestroy(target_p, &source_p->localClient->allow_list);
  99                 rb_dlinkFindDestroy(source_p, &target_p->on_allow_list);
 100         }
 101
 102         /* get the number of accepts they have */
 103         accept_num = rb_dlink_list_length(&source_p->localClient->allow_list);
 104
 105         /* parse the add list */
 106         for (nick = rb_strtok_r(addbuf, ",", &p); nick; nick = rb_strtok_r(NULL, ",", &p), accept_num++)
 107         {
 108                 /* shouldnt happen, but lets be paranoid */
 109                 if((target_p = find_named_person(nick)) == NULL)
 110                 {
 111                         sendto_one_numeric(source_p, ERR_NOSUCHNICK,
 112                                            form_str(ERR_NOSUCHNICK), nick);
 113                         continue;
 114                 }
 115
 116                 /* user is already on clients accept list */
 117                 if(accept_message(target_p, source_p))
 118                 {
 119                         sendto_one(source_p, form_str(ERR_ACCEPTEXIST),
 120                                    me.name, source_p->name, target_p->name);
 121                         continue;
 122                 }
 123
 124                 if(accept_num >= ConfigFileEntry.max_accept)
 125                 {
 126                         sendto_one(source_p, form_str(ERR_ACCEPTFULL), me.name, source_p->name);
 127                         return;
 128                 }
 129
 130                 /* why is this here? */
 131                 /* del_from accept(target_p, source_p); */
 132                 add_accept(source_p, target_p);
 133         }
 134 }
 135
 136 /*
 137  * build_nicklist()
 138  *
 139  * input        - pointer to client
 140  *              - pointer to addbuffer
 141  *              - pointer to remove buffer
 142  *              - pointer to list of nicks
 143  * output       -
 144  * side effects - addbuf/delbuf are modified to give valid nicks
 145  */
 146 static void
 147 build_nicklist(struct Client *source_p, char *addbuf, char *delbuf, const char *nicks)
 148 {
 149         char *name;
 150         char *p;
 151         int lenadd;
 152         int lendel;
 153         int del;
 154         char *n = LOCAL_COPY(nicks);
 155
 156         *addbuf = *delbuf = '\0';
 157         del = lenadd = lendel = 0;
 158
 159         /* build list of clients to add into addbuf, clients to remove in delbuf */
 160         for (name = rb_strtok_r(n, ",", &p); name; name = rb_strtok_r(NULL, ",", &p), del = 0)
 161         {
 162                 if(*name == '-')
 163                 {
 164                         del = 1;
 165                         name++;
 166                 }
 167
 168                 if(find_named_person(name) == NULL)
 169                 {
 170                         sendto_one_numeric(source_p, ERR_NOSUCHNICK,
 171                                            form_str(ERR_NOSUCHNICK), name);
 172                         continue;
 173                 }
 174
 175                 /* we're deleting a client */
 176                 if(del)
 177                 {
 178                         if(*delbuf)
 179                                 (void) strcat(delbuf, ",");
 180
 181                         (void) strncat(delbuf, name, BUFSIZE - lendel - 1);
 182                         lendel += strlen(name) + 1;
 183                 }
 184                 /* adding a client */
 185                 else
 186                 {
 187                         if(*addbuf)
 188                                 (void) strcat(addbuf, ",");
 189
 190                         (void) strncat(addbuf, name, BUFSIZE - lenadd - 1);
 191                         lenadd += strlen(name) + 1;
 192                 }
 193         }
 194 }
 195
 196 /*
 197  * add_accept()
 198  *
 199  * input        - pointer to clients accept list to add to
 200  *              - pointer to client to add
 201  * output       - none
 202  * side effects - target is added to clients list
 203  */
 204 static void
 205 add_accept(struct Client *source_p, struct Client *target_p)
 206 {
 207         rb_dlinkAddAlloc(target_p, &source_p->localClient->allow_list);
 208         rb_dlinkAddAlloc(source_p, &target_p->on_allow_list);
 209 }
 210
 211
 212 /*
 213  * list_accepts()
 214  *
 215  * input        - pointer to client
 216  * output       - none
 217  * side effects - print accept list to client
 218  */
 219 static void
 220 list_accepts(struct Client *source_p)
 221 {
 222         rb_dlink_node *ptr;
 223         struct Client *target_p;
 224         char nicks[BUFSIZE];
 225         int len = 0;
 226         int len2 = 0;
 227         int count = 0;
 228
 229         *nicks = '\0';
 230         len2 = strlen(source_p->name) + 10;
 231
 232         RB_DLINK_FOREACH(ptr, source_p->localClient->allow_list.head)
 233         {
 234                 target_p = ptr->data;
 235
 236                 if(target_p)
 237                 {
 238
 239                         if((len + strlen(target_p->name) + len2 > BUFSIZE) || count > 14)
 240                         {
 241                                 sendto_one(source_p, form_str(RPL_ACCEPTLIST),
 242                                            me.name, source_p->name, nicks);
 243
 244                                 len = count = 0;
 245                                 *nicks = '\0';
 246                         }
 247
 248                         len += snprintf(nicks + len, sizeof(nicks) - len, "%s ", target_p->name);
 249                         count++;
 250                 }
 251         }
 252
 253         if(*nicks)
 254                 sendto_one(source_p, form_str(RPL_ACCEPTLIST),
 255                            me.name, source_p->name, nicks);
 256
 257         sendto_one(source_p, form_str(RPL_ENDOFACCEPT),
 258                    me.name, source_p->name);
 259
 260 }