reslib: really fix it this time

[solanum.git] / ircd / send.c

/*
 *  ircd-ratbox: A slightly useful ircd.
 *  send.c: Functions for sending messages.
 *
 *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
 *  Copyright (C) 1996-2002 Hybrid Development Team
 *  Copyright (C) 2002-2005 ircd-ratbox development team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 */

#include "stdinc.h"
#include "send.h"
#include "channel.h"
#include "class.h"
#include "client.h"
#include "common.h"
#include "match.h"
#include "ircd.h"
#include "numeric.h"
#include "s_serv.h"
#include "s_conf.h"
#include "s_newconf.h"
#include "logger.h"
#include "hook.h"
#include "monitor.h"
#include "msgbuf.h"

/* send the message to the link the target is attached to */
#define send_linebuf(a,b) _send_linebuf((a->from ? a->from : a) ,b)

static void send_queued_write(rb_fde_t *F, void *data);

unsigned long current_serial = 0L;

struct Client *remote_rehash_oper_p;

/* send_linebuf()
 *
 * inputs       - client to send to, linebuf to attach
 * outputs      -
 * side effects - linebuf is attached to client
 */
static int
_send_linebuf(struct Client *to, buf_head_t *linebuf)
{
        if(IsMe(to))
        {
                sendto_realops_snomask(SNO_GENERAL, L_ALL, "Trying to send message to myself!");
                return 0;
        }

        if(!MyConnect(to) || IsIOError(to))
                return 0;

        if(rb_linebuf_len(&to->localClient->buf_sendq) > get_sendq(to))
        {
                if(IsServer(to))
                {
                        sendto_realops_snomask(SNO_GENERAL, L_ALL,
                                             "Max SendQ limit exceeded for %s: %u > %lu",
                                             to->name,
                                             rb_linebuf_len(&to->localClient->buf_sendq),
                                             get_sendq(to));

                        ilog(L_SERVER, "Max SendQ limit exceeded for %s: %u > %lu",
                             log_client_name(to, SHOW_IP),
                             rb_linebuf_len(&to->localClient->buf_sendq),
                             get_sendq(to));
                }

                dead_link(to, 1);
                return -1;
        }
        else
        {
                /* just attach the linebuf to the sendq instead of
                 * generating a new one
                 */
                rb_linebuf_attach(&to->localClient->buf_sendq, linebuf);
        }

        /*
         ** Update statistics. The following is slightly incorrect
         ** because it counts messages even if queued, but bytes
         ** only really sent. Queued bytes get updated in SendQueued.
         */
        to->localClient->sendM += 1;
        me.localClient->sendM += 1;
        if(rb_linebuf_len(&to->localClient->buf_sendq) > 0)
                send_queued(to);
        return 0;
}

/* send_linebuf_remote()
 *
 * inputs       - client to attach to, sender, linebuf
 * outputs      -
 * side effects - client has linebuf attached
 */
static void
send_linebuf_remote(struct Client *to, struct Client *from, buf_head_t *linebuf)
{
        if(to->from)
                to = to->from;

        /* we assume the caller has already tested for fake direction */
        _send_linebuf(to, linebuf);
}

/* send_queued_write()
 *
 * inputs       - fd to have queue sent, client we're sending to
 * outputs      - contents of queue
 * side effects - write is rescheduled if queue isnt emptied
 */
void
send_queued(struct Client *to)
{
        int retlen;

        rb_fde_t *F = to->localClient->F;
        if (!F)
                return;

        /* cant write anything to a dead socket. */
        if(IsIOError(to))
                return;

        /* try to flush later when the write event resets this */
        if(IsFlush(to))
                return;

        if(rb_linebuf_len(&to->localClient->buf_sendq))
        {
                while ((retlen =
                        rb_linebuf_flush(F, &to->localClient->buf_sendq)) > 0)
                {
                        /* We have some data written .. update counters */
                        ClearFlush(to);

                        to->localClient->sendB += retlen;
                        me.localClient->sendB += retlen;
                        if(to->localClient->sendB > 1023)
                        {
                                to->localClient->sendK += (to->localClient->sendB >> 10);
                                to->localClient->sendB &= 0x03ff;       /* 2^10 = 1024, 3ff = 1023 */
                        }
                        else if(me.localClient->sendB > 1023)
                        {
                                me.localClient->sendK += (me.localClient->sendB >> 10);
                                me.localClient->sendB &= 0x03ff;
                        }
                }

                if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno)))
                {
                        dead_link(to, 0);
                        return;
                }
        }

        if(rb_linebuf_len(&to->localClient->buf_sendq))
        {
                SetFlush(to);
                rb_setselect(to->localClient->F, RB_SELECT_WRITE,
                               send_queued_write, to);
        }
        else
                ClearFlush(to);
}

void
send_pop_queue(struct Client *to)
{
        if(to->from != NULL)
                to = to->from;
        if(!MyConnect(to) || IsIOError(to))
                return;
        if(rb_linebuf_len(&to->localClient->buf_sendq) > 0)
                send_queued(to);
}

/* send_queued_write()
 *
 * inputs       - fd to have queue sent, client we're sending to
 * outputs      - contents of queue
 * side effects - write is scheduled if queue isnt emptied
 */
static void
send_queued_write(rb_fde_t *F, void *data)
{
        struct Client *to = data;
        ClearFlush(to);
        send_queued(to);
}

/*
 * linebuf_put_msgvbuf
 *
 * inputs       - msgbuf header, linebuf object, capability mask, pattern, arguments
 * outputs      - none
 * side effects - the linebuf object is cleared, then populated using rb_linebuf_putmsg().
 */
static void
linebuf_put_msgvbuf(struct MsgBuf *msgbuf, buf_head_t *linebuf, unsigned int capmask, const char *pattern, va_list *va)
{
        char buf[IRCD_BUFSIZE];

        rb_linebuf_newbuf(linebuf);
        msgbuf_unparse_prefix(buf, sizeof buf, msgbuf, capmask);
        rb_linebuf_putprefix(linebuf, pattern, va, buf);
} 

/* linebuf_put_msgbuf
 *
 * inputs       - msgbuf header, linebuf object, capability mask, pattern, arguments
 * outputs      - none
 * side effects - the linebuf object is cleared, then populated using rb_linebuf_putmsg().
 */
static void
linebuf_put_msgbuf(struct MsgBuf *msgbuf, buf_head_t *linebuf, unsigned int capmask, const char *pattern, ...)
{
        va_list va;

        va_start(va, pattern);
        linebuf_put_msgvbuf(msgbuf, linebuf, capmask, pattern, &va);
        va_end(va);
}

/* build_msgbuf_from
 *
 * inputs       - msgbuf object, client the message is from
 * outputs      - none
 * side effects - a msgbuf object is populated with an origin and relevant tags
 * notes        - to make this reentrant, find a solution for `buf` below
 */
static void
build_msgbuf_from(struct MsgBuf *msgbuf, struct Client *from, const char *cmd)
{
        static char buf[BUFSIZE];
        hook_data hdata;

        msgbuf_init(msgbuf);

        msgbuf->origin = buf;
        msgbuf->cmd = cmd;

        if (from != NULL && IsPerson(from))
                snprintf(buf, sizeof buf, "%s!%s@%s", from->name, from->username, from->host);
        else if (from != NULL)
                rb_strlcpy(buf, from->name, sizeof buf);
        else
                rb_strlcpy(buf, me.name, sizeof buf);

        hdata.client = from;
        hdata.arg1 = msgbuf;

        call_hook(h_outbound_msgbuf, &hdata);
}

/* sendto_one()
 *
 * inputs       - client to send to, va_args
 * outputs      - client has message put into its queue
 * side effects -
 */
void
sendto_one(struct Client *target_p, const char *pattern, ...)
{
        va_list args;
        buf_head_t linebuf;

        /* send remote if to->from non NULL */
        if(target_p->from != NULL)
                target_p = target_p->from;

        if(IsIOError(target_p))
                return;

        rb_linebuf_newbuf(&linebuf);

        va_start(args, pattern);
        rb_linebuf_putmsg(&linebuf, pattern, &args, NULL);
        va_end(args);

        _send_linebuf(target_p, &linebuf);

        rb_linebuf_donebuf(&linebuf);
}

/* sendto_one_prefix()
 *
 * inputs       - client to send to, va_args
 * outputs      - client has message put into its queue
 * side effects - source(us)/target is chosen based on TS6 capability
 */
void
sendto_one_prefix(struct Client *target_p, struct Client *source_p,
                  const char *command, const char *pattern, ...)
{
        struct Client *dest_p;
        va_list args;
        buf_head_t linebuf;

        /* send remote if to->from non NULL */
        if(target_p->from != NULL)
                dest_p = target_p->from;
        else
                dest_p = target_p;

        if(IsIOError(dest_p))
                return;

        if(IsMe(dest_p))
        {
                sendto_realops_snomask(SNO_GENERAL, L_ALL, "Trying to send to myself!");
                return;
        }

        rb_linebuf_newbuf(&linebuf);
        va_start(args, pattern);
        rb_linebuf_putmsg(&linebuf, pattern, &args,
                       ":%s %s %s ",
                       get_id(source_p, target_p),
                       command, get_id(target_p, target_p));
        va_end(args);

        _send_linebuf(dest_p, &linebuf);
        rb_linebuf_donebuf(&linebuf);
}

/* sendto_one_notice()
 *
 * inputs       - client to send to, va_args
 * outputs      - client has a NOTICE put into its queue
 * side effects - source(us)/target is chosen based on TS6 capability
 */
void
sendto_one_notice(struct Client *target_p, const char *pattern, ...)
{
        struct Client *dest_p;
        va_list args;
        buf_head_t linebuf;
        char *to;

        /* send remote if to->from non NULL */
        if(target_p->from != NULL)
                dest_p = target_p->from;
        else
                dest_p = target_p;

        if(IsIOError(dest_p))
                return;

        if(IsMe(dest_p))
        {
                sendto_realops_snomask(SNO_GENERAL, L_ALL, "Trying to send to myself!");
                return;
        }

        rb_linebuf_newbuf(&linebuf);
        va_start(args, pattern);
        rb_linebuf_putmsg(&linebuf, pattern, &args,
                       ":%s NOTICE %s ",
                       get_id(&me, target_p), *(to = get_id(target_p, target_p)) != '\0' ? to : "*");
        va_end(args);

        _send_linebuf(dest_p, &linebuf);
        rb_linebuf_donebuf(&linebuf);
}


/* sendto_one_numeric()
 *
 * inputs       - client to send to, va_args
 * outputs      - client has message put into its queue
 * side effects - source/target is chosen based on TS6 capability
 */
void
sendto_one_numeric(struct Client *target_p, int numeric, const char *pattern, ...)
{
        struct Client *dest_p;
        va_list args;
        buf_head_t linebuf;
        char *to;

        /* send remote if to->from non NULL */
        if(target_p->from != NULL)
                dest_p = target_p->from;
        else
                dest_p = target_p;

        if(IsIOError(dest_p))
                return;

        if(IsMe(dest_p))
        {
                sendto_realops_snomask(SNO_GENERAL, L_ALL, "Trying to send to myself!");
                return;
        }

        rb_linebuf_newbuf(&linebuf);
        va_start(args, pattern);
        rb_linebuf_putmsg(&linebuf, pattern, &args,
                       ":%s %03d %s ",
                       get_id(&me, target_p),
                       numeric, *(to = get_id(target_p, target_p)) != '\0' ? to : "*");
        va_end(args);

        _send_linebuf(dest_p, &linebuf);
        rb_linebuf_donebuf(&linebuf);
}

/*
 * sendto_server
 *
 * inputs       - pointer to client to NOT send to
 *              - caps or'd together which must ALL be present
 *              - caps or'd together which must ALL NOT be present
 *              - printf style format string
 *              - args to format string
 * output       - NONE
 * side effects - Send a message to all connected servers, except the
 *                client 'one' (if non-NULL), as long as the servers
 *                support ALL capabs in 'caps', and NO capabs in 'nocaps'.
 *
 * This function was written in an attempt to merge together the other
 * billion sendto_*serv*() functions, which sprung up with capabs, uids etc
 * -davidt
 */
void
sendto_server(struct Client *one, struct Channel *chptr, unsigned long caps,
              unsigned long nocaps, const char *format, ...)
{
        va_list args;
        struct Client *target_p;
        rb_dlink_node *ptr;
        rb_dlink_node *next_ptr;
        buf_head_t linebuf;

        /* noone to send to.. */
        if(rb_dlink_list_length(&serv_list) == 0)
                return;

        if(chptr != NULL && *chptr->chname != '#')
                        return;

        rb_linebuf_newbuf(&linebuf);
        va_start(args, format);
        rb_linebuf_putmsg(&linebuf, format, &args, NULL);
        va_end(args);

        RB_DLINK_FOREACH_SAFE(ptr, next_ptr, serv_list.head)
        {
                target_p = ptr->data;

                /* check against 'one' */
                if(one != NULL && (target_p == one->from))
                        continue;

                /* check we have required capabs */
                if(!IsCapable(target_p, caps))
                        continue;

                /* check we don't have any forbidden capabs */
                if(!NotCapable(target_p, nocaps))
                        continue;

                _send_linebuf(target_p, &linebuf);
        }

        rb_linebuf_donebuf(&linebuf);

}

/* sendto_channel_flags()
 *
 * inputs       - server not to send to, flags needed, source, channel, va_args
 * outputs      - message is sent to channel members
 * side effects -
 */
void
sendto_channel_flags(struct Client *one, int type, struct Client *source_p,
                     struct Channel *chptr, const char *pattern, ...)
{
        char buf[IRCD_BUFSIZE];
        va_list args;
        buf_head_t rb_linebuf_local;
        buf_head_t rb_linebuf_id;
        struct Client *target_p;
        struct membership *msptr;
        rb_dlink_node *ptr;
        rb_dlink_node *next_ptr;
        unsigned int current_capmask = 0;
        struct MsgBuf msgbuf;

        rb_linebuf_newbuf(&rb_linebuf_local);
        rb_linebuf_newbuf(&rb_linebuf_id);

        current_serial++;

        build_msgbuf_from(&msgbuf, source_p, NULL);

        va_start(args, pattern);
        vsnprintf(buf, sizeof buf, pattern, args);
        va_end(args);

        linebuf_put_msgbuf(&msgbuf, &rb_linebuf_local, NOCAPS, "%s", buf);
        rb_linebuf_putmsg(&rb_linebuf_id, NULL, NULL, ":%s %s", use_id(source_p), buf);

        RB_DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->members.head)
        {
                msptr = ptr->data;
                target_p = msptr->client_p;

                if(!MyClient(source_p) && (IsIOError(target_p->from) || target_p->from == one))
                        continue;

                if(MyClient(source_p) && !IsCapable(source_p, CLICAP_ECHO_MESSAGE) && target_p == one)
                        continue;

                if(type && ((msptr->flags & type) == 0))
                        continue;

                if(IsDeaf(target_p))
                        continue;

                if(!MyClient(target_p))
                {
                        /* if we've got a specific type, target must support
                         * CHW.. --fl
                         */
                        if(type && NotCapable(target_p->from, CAP_CHW))
                                continue;

                        if(target_p->from->serial != current_serial)
                        {
                                send_linebuf_remote(target_p, source_p, &rb_linebuf_id);
                                target_p->from->serial = current_serial;
                        }
                }
                else
                {
                        if (target_p->localClient->caps != current_capmask)
                        {
                                /* reset the linebuf */
                                rb_linebuf_donebuf(&rb_linebuf_local);
                                rb_linebuf_newbuf(&rb_linebuf_local);

                                /* render the new linebuf and attach it */
                                linebuf_put_msgbuf(&msgbuf, &rb_linebuf_local, target_p->localClient->caps, "%s", buf);
                                current_capmask = target_p->localClient->caps;
                        }

                        _send_linebuf(target_p, &rb_linebuf_local);
                }
        }

        rb_linebuf_donebuf(&rb_linebuf_local);
        rb_linebuf_donebuf(&rb_linebuf_id);
}

/* sendto_channel_flags()
 *
 * inputs       - server not to send to, flags needed, source, channel, va_args
 * outputs      - message is sent to channel members
 * side effects -
 */
void
sendto_channel_opmod(struct Client *one, struct Client *source_p,
                     struct Channel *chptr, const char *command,
                     const char *text)
{
        buf_head_t rb_linebuf_local;
        buf_head_t rb_linebuf_old;
        buf_head_t rb_linebuf_new;
        struct Client *target_p;
        struct membership *msptr;
        rb_dlink_node *ptr;
        rb_dlink_node *next_ptr;

        rb_linebuf_newbuf(&rb_linebuf_local);
        rb_linebuf_newbuf(&rb_linebuf_old);
        rb_linebuf_newbuf(&rb_linebuf_new);

        current_serial++;

        if(IsServer(source_p))
                rb_linebuf_putmsg(&rb_linebuf_local, NULL, NULL,
                               ":%s %s %s :%s",
                               source_p->name, command, chptr->chname, text);
        else
                rb_linebuf_putmsg(&rb_linebuf_local, NULL, NULL,
                               ":%s!%s@%s %s %s :%s",
                               source_p->name, source_p->username,
                               source_p->host, command, chptr->chname, text);

        if (chptr->mode.mode & MODE_MODERATED)
                rb_linebuf_putmsg(&rb_linebuf_old, NULL, NULL,
                               ":%s %s %s :%s",
                               use_id(source_p), command, chptr->chname, text);
        else
                rb_linebuf_putmsg(&rb_linebuf_old, NULL, NULL,
                               ":%s NOTICE @%s :<%s:%s> %s",
                               use_id(source_p->servptr), chptr->chname,
                               source_p->name, chptr->chname, text);
        rb_linebuf_putmsg(&rb_linebuf_new, NULL, NULL,
                       ":%s %s =%s :%s",
                       use_id(source_p), command, chptr->chname, text);

        RB_DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->members.head)
        {
                msptr = ptr->data;
                target_p = msptr->client_p;

                if(!MyClient(source_p) && (IsIOError(target_p->from) || target_p->from == one))
                        continue;

                if(MyClient(source_p) && !IsCapable(source_p, CLICAP_ECHO_MESSAGE) && target_p == one)
                        continue;

                if((msptr->flags & CHFL_CHANOP) == 0)
                        continue;

                if(IsDeaf(target_p))
                        continue;

                if(!MyClient(target_p))
                {
                        /* if we've got a specific type, target must support
                         * CHW.. --fl
                         */
                        if(NotCapable(target_p->from, CAP_CHW))
                                continue;

                        if(target_p->from->serial != current_serial)
                        {
                                if (IsCapable(target_p->from, CAP_EOPMOD))
                                        send_linebuf_remote(target_p, source_p, &rb_linebuf_new);
                                else
                                        send_linebuf_remote(target_p, source_p, &rb_linebuf_old);
                                target_p->from->serial = current_serial;
                        }
                }
                else
                        _send_linebuf(target_p, &rb_linebuf_local);
        }

        rb_linebuf_donebuf(&rb_linebuf_local);
        rb_linebuf_donebuf(&rb_linebuf_old);
        rb_linebuf_donebuf(&rb_linebuf_new);
}

/* sendto_channel_local()
 *
 * inputs       - flags to send to, channel to send to, va_args
 * outputs      - message to local channel members
 * side effects -
 */
void
sendto_channel_local(int type, struct Channel *chptr, const char *pattern, ...)
{
        va_list args;
        buf_head_t linebuf;
        struct membership *msptr;
        struct Client *target_p;
        rb_dlink_node *ptr;
        rb_dlink_node *next_ptr;

        rb_linebuf_newbuf(&linebuf);

        va_start(args, pattern);
        rb_linebuf_putmsg(&linebuf, pattern, &args, NULL);
        va_end(args);

        RB_DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->locmembers.head)
        {
                msptr = ptr->data;
                target_p = msptr->client_p;

                if(IsIOError(target_p))
                        continue;

                if(type == ONLY_OPERS)
                {
                        if (!IsOper(target_p))
                                continue;
                }
                else if(type && ((msptr->flags & type) == 0))
                        continue;

                _send_linebuf(target_p, &linebuf);
        }

        rb_linebuf_donebuf(&linebuf);
}

/*
 * _sendto_channel_local_with_capability_butone()
 *
 * Shared implementation of sendto_channel_local_with_capability and sendto_channel_local_with_capability_butone
 */
static void
_sendto_channel_local_with_capability_butone(struct Client *one, int type, int caps, int negcaps, struct Channel *chptr,
        const char *pattern, va_list * args)
{
        buf_head_t linebuf;
        struct membership *msptr;
        struct Client *target_p;
        rb_dlink_node *ptr;
        rb_dlink_node *next_ptr;

        rb_linebuf_newbuf(&linebuf);
        rb_linebuf_putmsg(&linebuf, pattern, args, NULL);

        RB_DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->locmembers.head)
        {
                msptr = ptr->data;
                target_p = msptr->client_p;

                if (target_p == one)
                        continue;

                if(IsIOError(target_p) ||
                   !IsCapable(target_p, caps) ||
                   !NotCapable(target_p, negcaps))
                        continue;

                if(type && ((msptr->flags & type) == 0))
                        continue;

                _send_linebuf(target_p, &linebuf);
        }

        rb_linebuf_donebuf(&linebuf);
}

/* sendto_channel_local_with_capability()
 *
 * inputs       - flags to send to, caps, negate caps, channel to send to, va_args
 * outputs      - message to local channel members
 * side effects -
 */
void
sendto_channel_local_with_capability(int type, int caps, int negcaps, struct Channel *chptr, const char *pattern, ...)
{
        va_list args;

        va_start(args, pattern);
        _sendto_channel_local_with_capability_butone(NULL, type, caps, negcaps, chptr, pattern, &args);
        va_end(args);
}


/* sendto_channel_local_with_capability()
 *
 * inputs       - flags to send to, caps, negate caps, channel to send to, va_args
 * outputs      - message to local channel members
 * side effects -
 */
void
sendto_channel_local_with_capability_butone(struct Client *one, int type, int caps, int negcaps, struct Channel *chptr,
                const char *pattern, ...)
{
        va_list args;

        va_start(args, pattern);
        _sendto_channel_local_with_capability_butone(one, type, caps, negcaps, chptr, pattern, &args);
        va_end(args);
}


/* sendto_channel_local_butone()
 *
 * inputs       - flags to send to, channel to send to, va_args
 *              - user to ignore when sending
 * outputs      - message to local channel members
 * side effects -
 */
void
sendto_channel_local_butone(struct Client *one, int type, struct Channel *chptr, const char *pattern, ...)
{
        va_list args;
        buf_head_t linebuf;
        struct membership *msptr;
        struct Client *target_p;
        struct MsgBuf msgbuf;
        rb_dlink_node *ptr;
        rb_dlink_node *next_ptr;

        rb_linebuf_newbuf(&linebuf);

        build_msgbuf_from(&msgbuf, one, NULL);

        va_start(args, pattern);
        rb_linebuf_putmsg(&linebuf, pattern, &args, NULL);
        va_end(args);

        RB_DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->locmembers.head)
        {
                msptr = ptr->data;
                target_p = msptr->client_p;

                if(target_p == one)
                        continue;

                if(IsIOError(target_p))
                        continue;

                if(type && ((msptr->flags & type) == 0))
                        continue;

                /* attach the present linebuf to the target */
                _send_linebuf(target_p, &linebuf);
        }

        rb_linebuf_donebuf(&linebuf);
}

/*
 * sendto_common_channels_local()
 *
 * inputs       - pointer to client
 *              - capability mask
 *              - negated capability mask
 *              - pattern to send
 * output       - NONE
 * side effects - Sends a message to all people on local server who are
 *                in same channel with user.
 *                used by m_nick.c and exit_one_client.
 */
void
sendto_common_channels_local(struct Client *user, int cap, int negcap, const char *pattern, ...)
{
        va_list args;
        rb_dlink_node *ptr;
        rb_dlink_node *next_ptr;
        rb_dlink_node *uptr;
        rb_dlink_node *next_uptr;
        struct Channel *chptr;
        struct Client *target_p;
        struct membership *msptr;
        struct membership *mscptr;
        buf_head_t linebuf;

        rb_linebuf_newbuf(&linebuf);
        va_start(args, pattern);
        rb_linebuf_putmsg(&linebuf, pattern, &args, NULL);
        va_end(args);

        ++current_serial;

        RB_DLINK_FOREACH_SAFE(ptr, next_ptr, user->user->channel.head)
        {
                mscptr = ptr->data;
                chptr = mscptr->chptr;

                RB_DLINK_FOREACH_SAFE(uptr, next_uptr, chptr->locmembers.head)
                {
                        msptr = uptr->data;
                        target_p = msptr->client_p;

                        if(IsIOError(target_p) ||
                           target_p->serial == current_serial ||
                           !IsCapable(target_p, cap) ||
                           !NotCapable(target_p, negcap))
                                continue;

                        target_p->serial = current_serial;
                        send_linebuf(target_p, &linebuf);
                }
        }

        /* this can happen when the user isnt in any channels, but we still
         * need to send them the data, ie a nick change
         */
        if(MyConnect(user) && (user->serial != current_serial))
                send_linebuf(user, &linebuf);

        rb_linebuf_donebuf(&linebuf);
}

/*
 * sendto_common_channels_local_butone()
 *
 * inputs       - pointer to client
 *              - capability mask
 *              - negated capability mask
 *              - pattern to send
 * output       - NONE
 * side effects - Sends a message to all people on local server who are
 *                in same channel with user, except for user itself.
 */
void
sendto_common_channels_local_butone(struct Client *user, int cap, int negcap, const char *pattern, ...)
{
        va_list args;
        rb_dlink_node *ptr;
        rb_dlink_node *next_ptr;
        rb_dlink_node *uptr;
        rb_dlink_node *next_uptr;
        struct Channel *chptr;
        struct Client *target_p;
        struct membership *msptr;
        struct membership *mscptr;
        buf_head_t linebuf;

        rb_linebuf_newbuf(&linebuf);

        va_start(args, pattern);
        rb_linebuf_putmsg(&linebuf, pattern, &args, NULL);
        va_end(args);

        ++current_serial;
        /* Skip them -- jilles */
        user->serial = current_serial;

        RB_DLINK_FOREACH_SAFE(ptr, next_ptr, user->user->channel.head)
        {
                mscptr = ptr->data;
                chptr = mscptr->chptr;

                RB_DLINK_FOREACH_SAFE(uptr, next_uptr, chptr->locmembers.head)
                {
                        msptr = uptr->data;
                        target_p = msptr->client_p;

                        if(IsIOError(target_p) ||
                           target_p->serial == current_serial ||
                           !IsCapable(target_p, cap) ||
                           !NotCapable(target_p, negcap))
                                continue;

                        target_p->serial = current_serial;
                        send_linebuf(target_p, &linebuf);
                }
        }

        rb_linebuf_donebuf(&linebuf);
}

/* sendto_match_butone()
 *
 * inputs       - server not to send to, source, mask, type of mask, va_args
 * output       -
 * side effects - message is sent to matching clients
 */
void
sendto_match_butone(struct Client *one, struct Client *source_p,
                    const char *mask, int what, const char *pattern, ...)
{
        static char buf[BUFSIZE];
        va_list args;
        struct Client *target_p;
        rb_dlink_node *ptr;
        rb_dlink_node *next_ptr;
        buf_head_t rb_linebuf_local;
        buf_head_t rb_linebuf_id;

        rb_linebuf_newbuf(&rb_linebuf_local);
        rb_linebuf_newbuf(&rb_linebuf_id);

        va_start(args, pattern);
        vsnprintf(buf, sizeof(buf), pattern, args);
        va_end(args);

        if(IsServer(source_p))
                rb_linebuf_putmsg(&rb_linebuf_local, NULL, NULL,
                               ":%s %s", source_p->name, buf);
        else
                rb_linebuf_putmsg(&rb_linebuf_local, NULL, NULL,
                               ":%s!%s@%s %s",
                               source_p->name, source_p->username,
                               source_p->host, buf);

        rb_linebuf_putmsg(&rb_linebuf_id, NULL, NULL, ":%s %s", use_id(source_p), buf);

        if(what == MATCH_HOST)
        {
                RB_DLINK_FOREACH_SAFE(ptr, next_ptr, lclient_list.head)
                {
                        target_p = ptr->data;

                        if(match(mask, target_p->host))
                                _send_linebuf(target_p, &rb_linebuf_local);
                }
        }
        /* what = MATCH_SERVER, if it doesnt match us, just send remote */
        else if(match(mask, me.name))
        {
                RB_DLINK_FOREACH_SAFE(ptr, next_ptr, lclient_list.head)
                {
                        target_p = ptr->data;
                        _send_linebuf(target_p, &rb_linebuf_local);
                }
        }

        RB_DLINK_FOREACH(ptr, serv_list.head)
        {
                target_p = ptr->data;

                if(target_p == one)
                        continue;

                send_linebuf_remote(target_p, source_p, &rb_linebuf_id);
        }

        rb_linebuf_donebuf(&rb_linebuf_local);
        rb_linebuf_donebuf(&rb_linebuf_id);
}

/* sendto_match_servs()
 *
 * inputs       - source, mask to send to, caps needed, va_args
 * outputs      -
 * side effects - message is sent to matching servers with caps.
 */
void
sendto_match_servs(struct Client *source_p, const char *mask, int cap,
                        int nocap, const char *pattern, ...)
{
        static char buf[BUFSIZE];
        va_list args;
        rb_dlink_node *ptr;
        struct Client *target_p;
        buf_head_t rb_linebuf_id;

        if(EmptyString(mask))
                return;

        rb_linebuf_newbuf(&rb_linebuf_id);

        va_start(args, pattern);
        vsnprintf(buf, sizeof(buf), pattern, args);
        va_end(args);

        rb_linebuf_putmsg(&rb_linebuf_id, NULL, NULL,
                        ":%s %s", use_id(source_p), buf);

        current_serial++;

        RB_DLINK_FOREACH(ptr, global_serv_list.head)
        {
                target_p = ptr->data;

                /* dont send to ourselves, or back to where it came from.. */
                if(IsMe(target_p) || target_p->from == source_p->from)
                        continue;

                if(target_p->from->serial == current_serial)
                        continue;

                if(match(mask, target_p->name))
                {
                        /* if we set the serial here, then we'll never do
                         * a match() again if !IsCapable()
                         */
                        target_p->from->serial = current_serial;

                        if(cap && !IsCapable(target_p->from, cap))
                                continue;

                        if(nocap && !NotCapable(target_p->from, nocap))
                                continue;

                        _send_linebuf(target_p->from, &rb_linebuf_id);
                }
        }

        rb_linebuf_donebuf(&rb_linebuf_id);
}

/* sendto_local_clients_with_capability()
 *
 * inputs       - caps needed, pattern, va_args
 * outputs      -
 * side effects - message is sent to matching local clients with caps.
 */
void
sendto_local_clients_with_capability(int cap, const char *pattern, ...)
{
        va_list args;
        rb_dlink_node *ptr;
        struct Client *target_p;
        buf_head_t linebuf;

        rb_linebuf_newbuf(&linebuf);

        va_start(args, pattern);
        rb_linebuf_putmsg(&linebuf, pattern, &args, NULL);
        va_end(args);

        RB_DLINK_FOREACH(ptr, lclient_list.head)
        {
                target_p = ptr->data;

                if(IsIOError(target_p) || !IsCapable(target_p, cap))
                        continue;

                send_linebuf(target_p, &linebuf);
        }

        rb_linebuf_donebuf(&linebuf);
}

/* sendto_monitor()
 *
 * inputs       - monitor nick to send to, format, va_args
 * outputs      - message to local users monitoring the given nick
 * side effects -
 */
void
sendto_monitor(struct monitor *monptr, const char *pattern, ...)
{
        va_list args;
        buf_head_t linebuf;
        struct Client *target_p;
        rb_dlink_node *ptr;
        rb_dlink_node *next_ptr;

        rb_linebuf_newbuf(&linebuf);

        va_start(args, pattern);
        rb_linebuf_putmsg(&linebuf, pattern, &args, NULL);
        va_end(args);

        RB_DLINK_FOREACH_SAFE(ptr, next_ptr, monptr->users.head)
        {
                target_p = ptr->data;

                if(IsIOError(target_p))
                        continue;

                _send_linebuf(target_p, &linebuf);
        }

        rb_linebuf_donebuf(&linebuf);
}

/* sendto_anywhere()
 *
 * inputs       - target, source, va_args
 * outputs      -
 * side effects - client is sent message with correct prefix.
 */
void
sendto_anywhere(struct Client *target_p, struct Client *source_p,
                const char *command, const char *pattern, ...)
{
        va_list args;
        buf_head_t linebuf;

        rb_linebuf_newbuf(&linebuf);

        va_start(args, pattern);

        if(MyClient(target_p))
        {
                if(IsServer(source_p))
                        rb_linebuf_putmsg(&linebuf, pattern, &args, ":%s %s %s ",
                                       source_p->name, command,
                                       target_p->name);
                else
                {
                        struct MsgBuf msgbuf;

                        build_msgbuf_from(&msgbuf, source_p, command);
                        msgbuf.target = target_p->name;

                        linebuf_put_msgvbuf(&msgbuf, &linebuf, target_p->localClient->caps, pattern, &args);
                }
        }
        else
                rb_linebuf_putmsg(&linebuf, pattern, &args, ":%s %s %s ",
                               get_id(source_p, target_p), command,
                               get_id(target_p, target_p));
        va_end(args);

        if(MyClient(target_p))
                _send_linebuf(target_p, &linebuf);
        else
                send_linebuf_remote(target_p, source_p, &linebuf);

        rb_linebuf_donebuf(&linebuf);
}

/* sendto_realops_snomask()
 *
 * inputs       - snomask needed, level (opers/admin), va_args
 * output       -
 * side effects - message is sent to opers with matching snomasks
 */
void
sendto_realops_snomask(int flags, int level, const char *pattern, ...)
{
        static char buf[BUFSIZE];
        char *snobuf;
        struct Client *client_p;
        rb_dlink_node *ptr;
        rb_dlink_node *next_ptr;
        va_list args;
        buf_head_t linebuf;

        rb_linebuf_newbuf(&linebuf);

        /* Be very sure not to do things like "Trying to send to myself"
         * L_NETWIDE, otherwise infinite recursion may result! -- jilles */
        if (level & L_NETWIDE && ConfigFileEntry.global_snotices)
        {
                /* rather a lot of copying around, oh well -- jilles */
                va_start(args, pattern);
                vsnprintf(buf, sizeof(buf), pattern, args);
                va_end(args);
                rb_linebuf_putmsg(&linebuf, pattern, NULL,
                                ":%s NOTICE * :*** Notice -- %s", me.name, buf);
                snobuf = construct_snobuf(flags);
                if (snobuf[1] != '\0')
                        sendto_server(NULL, NULL, CAP_ENCAP|CAP_TS6, NOCAPS,
                                        ":%s ENCAP * SNOTE %c :%s",
                                        me.id, snobuf[1], buf);
        }
        else if (remote_rehash_oper_p != NULL)
        {
                /* rather a lot of copying around, oh well -- jilles */
                va_start(args, pattern);
                vsnprintf(buf, sizeof(buf), pattern, args);
                va_end(args);
                rb_linebuf_putmsg(&linebuf, pattern, NULL,
                                ":%s NOTICE * :*** Notice -- %s", me.name, buf);
                sendto_one_notice(remote_rehash_oper_p, ":*** Notice -- %s", buf);
        }
        else
        {
                va_start(args, pattern);
                rb_linebuf_putmsg(&linebuf, pattern, &args,
                                ":%s NOTICE * :*** Notice -- ", me.name);
                va_end(args);
        }
        level &= ~L_NETWIDE;

        RB_DLINK_FOREACH_SAFE(ptr, next_ptr, local_oper_list.head)
        {
                client_p = ptr->data;

                /* If we're sending it to opers and theyre an admin, skip.
                 * If we're sending it to admins, and theyre not, skip.
                 */
                if(((level == L_ADMIN) && !IsOperAdmin(client_p)) ||
                   ((level == L_OPER) && IsOperAdmin(client_p)))
                        continue;

                if(client_p->snomask & flags)
                        _send_linebuf(client_p, &linebuf);
        }

        rb_linebuf_donebuf(&linebuf);
}
/* sendto_realops_snomask_from()
 *
 * inputs       - snomask needed, level (opers/admin), source server, va_args
 * output       -
 * side effects - message is sent to opers with matching snomask
 */
void
sendto_realops_snomask_from(int flags, int level, struct Client *source_p,
                const char *pattern, ...)
{
        struct Client *client_p;
        rb_dlink_node *ptr;
        rb_dlink_node *next_ptr;
        va_list args;
        buf_head_t linebuf;

        rb_linebuf_newbuf(&linebuf);

        va_start(args, pattern);
        rb_linebuf_putmsg(&linebuf, pattern, &args,
                       ":%s NOTICE * :*** Notice -- ", source_p->name);
        va_end(args);

        RB_DLINK_FOREACH_SAFE(ptr, next_ptr, local_oper_list.head)
        {
                client_p = ptr->data;

                /* If we're sending it to opers and theyre an admin, skip.
                 * If we're sending it to admins, and theyre not, skip.
                 */
                if(((level == L_ADMIN) && !IsOperAdmin(client_p)) ||
                   ((level == L_OPER) && IsOperAdmin(client_p)))
                        continue;

                if(client_p->snomask & flags)
                        _send_linebuf(client_p, &linebuf);
        }

        rb_linebuf_donebuf(&linebuf);
}

/*
 * sendto_wallops_flags
 *
 * inputs       - flag types of messages to show to real opers
 *              - client sending request
 *              - var args input message
 * output       - NONE
 * side effects - Send a wallops to local opers
 */
void
sendto_wallops_flags(int flags, struct Client *source_p, const char *pattern, ...)
{
        struct Client *client_p;
        rb_dlink_node *ptr;
        rb_dlink_node *next_ptr;
        va_list args;
        buf_head_t linebuf;

        rb_linebuf_newbuf(&linebuf);

        va_start(args, pattern);

        if(IsPerson(source_p))
                rb_linebuf_putmsg(&linebuf, pattern, &args,
                               ":%s!%s@%s WALLOPS :", source_p->name,
                               source_p->username, source_p->host);
        else
                rb_linebuf_putmsg(&linebuf, pattern, &args, ":%s WALLOPS :", source_p->name);

        va_end(args);

        RB_DLINK_FOREACH_SAFE(ptr, next_ptr, IsPerson(source_p) && flags == UMODE_WALLOP ? lclient_list.head : local_oper_list.head)
        {
                client_p = ptr->data;

                if(client_p->umodes & flags)
                        _send_linebuf(client_p, &linebuf);
        }

        rb_linebuf_donebuf(&linebuf);
}

/* kill_client()
 *
 * input        - client to send kill to, client to kill, va_args
 * output       -
 * side effects - we issue a kill for the client
 */
void
kill_client(struct Client *target_p, struct Client *diedie, const char *pattern, ...)
{
        va_list args;
        buf_head_t linebuf;

        rb_linebuf_newbuf(&linebuf);

        va_start(args, pattern);
        rb_linebuf_putmsg(&linebuf, pattern, &args, ":%s KILL %s :",
                      get_id(&me, target_p), get_id(diedie, target_p));
        va_end(args);

        send_linebuf(target_p, &linebuf);
        rb_linebuf_donebuf(&linebuf);
}


/*
 * kill_client_serv_butone
 *
 * inputs       - pointer to client to not send to
 *              - pointer to client to kill
 * output       - NONE
 * side effects - Send a KILL for the given client
 *                message to all connected servers
 *                except the client 'one'. Also deal with
 *                client being unknown to leaf, as in lazylink...
 */
void
kill_client_serv_butone(struct Client *one, struct Client *target_p, const char *pattern, ...)
{
        static char buf[BUFSIZE];
        va_list args;
        struct Client *client_p;
        rb_dlink_node *ptr;
        rb_dlink_node *next_ptr;
        buf_head_t rb_linebuf_id;

        rb_linebuf_newbuf(&rb_linebuf_id);

        va_start(args, pattern);
        vsnprintf(buf, sizeof(buf), pattern, args);
        va_end(args);

        rb_linebuf_putmsg(&rb_linebuf_id, NULL, NULL, ":%s KILL %s :%s",
                       use_id(&me), use_id(target_p), buf);

        RB_DLINK_FOREACH_SAFE(ptr, next_ptr, serv_list.head)
        {
                client_p = ptr->data;

                /* ok, if the client we're supposed to not send to has an
                 * ID, then we still want to issue the kill there..
                 */
                if(one != NULL && (client_p == one->from) &&
                        (!has_id(client_p) || !has_id(target_p)))
                        continue;

                _send_linebuf(client_p, &rb_linebuf_id);
        }

        rb_linebuf_donebuf(&rb_linebuf_id);
}