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construct/modules/m_alias.cc
2016-08-23 15:25:09 -07:00

150 lines
4.2 KiB
C++

/* modules/m_alias.c - main module for aliases
* Copyright (c) 2016 Elizabeth Myers <elizabeth@interlinked.me>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice is present in all copies.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
using namespace ircd;
static const char alias_desc[] = "Provides the system for services aliases";
static int _modinit(void);
static void _moddeinit(void);
static int reload_aliases(hook_data *);
static void m_alias(struct MsgBuf *, client::client &, client::client &, int, const char **);
mapi_hfn_list_av1 alias_hfnlist[] = {
{ "rehash", (hookfn)reload_aliases },
{ NULL, NULL },
};
DECLARE_MODULE_AV2(alias, _modinit, _moddeinit, NULL, NULL, alias_hfnlist, NULL, NULL, alias_desc);
static rb_dlink_list alias_messages;
static const struct MessageEntry alias_msgtab[] =
{{m_alias, 2}, {m_alias, 2}, mg_ignore, mg_ignore, mg_ignore, {m_alias, 2}};
static inline void
create_aliases(void)
{
s_assert(rb_dlink_list_length(&alias_messages) == 0);
for (auto it = alias_dict.begin(); it != alias_dict.end(); it++)
{
std::shared_ptr<alias_entry> alias = it->second;
struct Message *message = (Message *)rb_malloc(sizeof(*message) + alias->name.size() + 1);
char *cmd = (char*)message + sizeof(*message);
/* copy the alias name as it will be freed early on a rehash */
strcpy(cmd, alias->name.c_str());
message->cmd = cmd;
memcpy(message->handlers, alias_msgtab, sizeof(alias_msgtab));
mod_add_cmd(message);
rb_dlinkAddAlloc(message, &alias_messages);
}
}
static inline void
destroy_aliases(void)
{
rb_dlink_node *ptr, *nptr;
RB_DLINK_FOREACH_SAFE(ptr, nptr, alias_messages.head)
{
mod_del_cmd((struct Message *)ptr->data);
rb_free(ptr->data);
rb_dlinkDestroy(ptr, &alias_messages);
}
}
static int
_modinit(void)
{
create_aliases();
return 0;
}
static void
_moddeinit(void)
{
destroy_aliases();
}
static int
reload_aliases(hook_data *data)
{
destroy_aliases(); /* Clear old aliases */
create_aliases();
return 0;
}
/* The below was mostly taken from the old do_alias */
static void
m_alias(struct MsgBuf *msgbuf, client::client &client, client::client &source, int parc, const char **parv)
{
client::client *target_p;
std::shared_ptr<alias_entry> aptr = alias_dict[msgbuf->cmd];
char *str;
if(aptr == NULL)
{
/* This shouldn't happen... */
if(is_person(client))
sendto_one(&client, form_str(ERR_UNKNOWNCOMMAND),
me.name, client.name, msgbuf->cmd);
return;
}
if(!is_flood_done(client) && client.localClient->receiveM > 20)
flood_endgrace(&client);
auto pos = aptr->target.find('@');
if(pos != std::string::npos)
{
/* user@server */
target_p = find_server(NULL, aptr->target.substr(pos + 1).c_str());
if(target_p != NULL && is_me(*target_p))
target_p = NULL;
}
else
{
/* nick, must be +S */
target_p = client::find_named_person(aptr->target.c_str());
if(target_p != NULL && !is(*target_p, umode::SERVICE))
target_p = NULL;
}
if(target_p == NULL)
{
sendto_one_numeric(&client, ERR_SERVICESDOWN, form_str(ERR_SERVICESDOWN), aptr->target.c_str());
return;
}
str = reconstruct_parv(parc - 1, &parv[1]);
if(EmptyString(str))
{
sendto_one(&client, form_str(ERR_NOTEXTTOSEND), me.name, target_p->name);
return;
}
sendto_one(target_p, ":%s PRIVMSG %s :%s",
get_id(&client, target_p),
pos != std::string::npos ? aptr->target.c_str() : get_id(target_p, target_p),
str);
}