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angiosperm/ircd/client.c
Ed Kellett a6f63a829e
Innovation by sed
2020-10-15 15:52:41 +01:00

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/*
* Solanum: a slightly advanced ircd
* client.c: Controls clients.
*
* 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
* Copyright (C) 2007 William Pitcock
*
* 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 "defaults.h"
#include "client.h"
#include "class.h"
#include "hash.h"
#include "match.h"
#include "ircd.h"
#include "numeric.h"
#include "packet.h"
#include "authproc.h"
#include "s_conf.h"
#include "s_newconf.h"
#include "logger.h"
#include "s_serv.h"
#include "s_stats.h"
#include "send.h"
#include "whowas.h"
#include "s_user.h"
#include "hash.h"
#include "hostmask.h"
#include "listener.h"
#include "hook.h"
#include "msg.h"
#include "monitor.h"
#include "reject.h"
#include "scache.h"
#include "rb_dictionary.h"
#include "sslproc.h"
#include "wsproc.h"
#include "s_assert.h"
#define DEBUG_EXITED_CLIENTS
static void check_pings_list(rb_dlink_list * list);
static void check_unknowns_list(rb_dlink_list * list);
static void free_exited_clients(void *unused);
static void exit_aborted_clients(void *unused);
static int exit_remote_client(struct Client *, struct Client *, struct Client *,const char *);
static int exit_remote_server(struct Client *, struct Client *, struct Client *,const char *);
static int exit_local_client(struct Client *, struct Client *, struct Client *,const char *);
static int exit_unknown_client(struct Client *, struct Client *, struct Client *,const char *);
static int exit_local_server(struct Client *, struct Client *, struct Client *,const char *);
static int qs_server(struct Client *, struct Client *, struct Client *, const char *comment);
static EVH check_pings;
static rb_bh *client_heap = NULL;
static rb_bh *lclient_heap = NULL;
static rb_bh *pclient_heap = NULL;
static rb_bh *user_heap = NULL;
static rb_bh *away_heap = NULL;
static char current_uid[IDLEN];
static uint32_t current_connid = 0;
rb_dictionary *nd_dict = NULL;
rb_dlink_list dead_list;
#ifdef DEBUG_EXITED_CLIENTS
static rb_dlink_list dead_remote_list;
#endif
struct abort_client
{
rb_dlink_node node;
struct Client *client;
char notice[REASONLEN];
};
static rb_dlink_list abort_list;
/*
* init_client
*
* inputs - NONE
* output - NONE
* side effects - initialize client free memory
*/
void
init_client(void)
{
/*
* start off the check ping event .. -- adrian
* Every 30 seconds is plenty -- db
*/
client_heap = rb_bh_create(sizeof(struct Client), CLIENT_HEAP_SIZE, "client_heap");
lclient_heap = rb_bh_create(sizeof(struct LocalUser), LCLIENT_HEAP_SIZE, "lclient_heap");
pclient_heap = rb_bh_create(sizeof(struct PreClient), PCLIENT_HEAP_SIZE, "pclient_heap");
user_heap = rb_bh_create(sizeof(struct User), USER_HEAP_SIZE, "user_heap");
away_heap = rb_bh_create(AWAYLEN, AWAY_HEAP_SIZE, "away_heap");
rb_event_addish("check_pings", check_pings, NULL, 30);
rb_event_addish("free_exited_clients", &free_exited_clients, NULL, 4);
rb_event_addish("exit_aborted_clients", exit_aborted_clients, NULL, 1);
rb_event_add("flood_recalc", flood_recalc, NULL, 1);
nd_dict = rb_dictionary_create("nickdelay", irccmp);
}
/*
* connid_get - allocate a connid
*
* inputs - none
* outputs - a connid token which is used to represent a logical circuit
* side effects - current_connid is incremented, possibly multiple times.
* the association of the connid to it's client is committed.
*/
uint32_t
connid_get(struct Client *client_p)
{
s_assert(MyConnect(client_p));
if (!MyConnect(client_p))
return 0;
/* find a connid that is available */
while (find_cli_connid_hash(++current_connid) != NULL)
{
/* handle wraparound, current_connid must NEVER be 0 */
if (current_connid == 0)
++current_connid;
}
add_to_cli_connid_hash(client_p, current_connid);
rb_dlinkAddAlloc(RB_UINT_TO_POINTER(current_connid), &client_p->localClient->connids);
return current_connid;
}
/*
* connid_put - free a connid
*
* inputs - connid to free
* outputs - nothing
* side effects - connid bookkeeping structures are freed
*/
void
connid_put(uint32_t id)
{
struct Client *client_p;
s_assert(id != 0);
if (id == 0)
return;
client_p = find_cli_connid_hash(id);
if (client_p == NULL)
return;
del_from_cli_connid_hash(id);
rb_dlinkFindDestroy(RB_UINT_TO_POINTER(id), &client_p->localClient->connids);
}
/*
* client_release_connids - release any connids still attached to a client
*
* inputs - client to garbage collect
* outputs - none
* side effects - client's connids are garbage collected
*/
void
client_release_connids(struct Client *client_p)
{
rb_dlink_node *ptr, *ptr2;
if (client_p->localClient->connids.head)
s_assert(MyConnect(client_p));
if (!MyConnect(client_p))
return;
RB_DLINK_FOREACH_SAFE(ptr, ptr2, client_p->localClient->connids.head)
connid_put(RB_POINTER_TO_UINT(ptr->data));
}
/*
* make_client - create a new Client struct and set it to initial state.
*
* from == NULL, create local client (a client connected
* to a socket).
*
* from, create remote client (behind a socket
* associated with the client defined by
* 'from'). ('from' is a local client!!).
*/
struct Client *
make_client(struct Client *from)
{
struct Client *client_p = NULL;
struct LocalUser *localClient;
client_p = rb_bh_alloc(client_heap);
if(from == NULL)
{
client_p->from = client_p; /* 'from' of local client is self! */
localClient = rb_bh_alloc(lclient_heap);
SetMyConnect(client_p);
client_p->localClient = localClient;
client_p->localClient->lasttime = client_p->localClient->firsttime = rb_current_time();
client_p->localClient->F = NULL;
client_p->preClient = rb_bh_alloc(pclient_heap);
/* as good a place as any... */
rb_dlinkAdd(client_p, &client_p->localClient->tnode, &unknown_list);
}
else
{ /* from is not NULL */
client_p->localClient = NULL;
client_p->preClient = NULL;
client_p->from = from; /* 'from' of local client is self! */
}
SetUnknown(client_p);
rb_strlcpy(client_p->username, "unknown", sizeof(client_p->username));
return client_p;
}
void
free_pre_client(struct Client *client_p)
{
s_assert(NULL != client_p);
if(client_p->preClient == NULL)
return;
s_assert(client_p->preClient->auth.cid == 0);
rb_free(client_p->preClient->auth.data);
rb_free(client_p->preClient->auth.reason);
rb_bh_free(pclient_heap, client_p->preClient);
client_p->preClient = NULL;
}
static void
free_local_client(struct Client *client_p)
{
s_assert(NULL != client_p);
s_assert(&me != client_p);
if(client_p->localClient == NULL)
return;
/*
* clean up extra sockets from P-lines which have been discarded.
*/
if(client_p->localClient->listener)
{
s_assert(0 < client_p->localClient->listener->ref_count);
if(0 == --client_p->localClient->listener->ref_count
&& !client_p->localClient->listener->active)
free_listener(client_p->localClient->listener);
client_p->localClient->listener = 0;
}
client_release_connids(client_p);
if(client_p->localClient->F != NULL)
{
rb_close(client_p->localClient->F);
}
if(client_p->localClient->passwd)
{
memset(client_p->localClient->passwd, 0,
strlen(client_p->localClient->passwd));
rb_free(client_p->localClient->passwd);
}
rb_free(client_p->localClient->auth_user);
rb_free(client_p->localClient->challenge);
rb_free(client_p->localClient->fullcaps);
rb_free(client_p->localClient->mangledhost);
if (IsSSL(client_p))
ssld_decrement_clicount(client_p->localClient->ssl_ctl);
rb_free(client_p->localClient->cipher_string);
if (IsCapable(client_p, CAP_ZIP))
ssld_decrement_clicount(client_p->localClient->z_ctl);
rb_free(client_p->localClient->zipstats);
if (client_p->localClient->ws_ctl != NULL)
wsockd_decrement_clicount(client_p->localClient->ws_ctl);
rb_bh_free(lclient_heap, client_p->localClient);
client_p->localClient = NULL;
}
static void
free_client(struct Client *client_p)
{
s_assert(NULL != client_p);
s_assert(&me != client_p);
free_local_client(client_p);
free_pre_client(client_p);
rb_free(client_p->certfp);
rb_bh_free(client_heap, client_p);
}
/*
* check_pings - go through the local client list and check activity
* kill off stuff that should die
*
* inputs - NOT USED (from event)
* output - next time_t when check_pings() should be called again
* side effects -
*
*
* A PING can be sent to clients as necessary.
*
* Client/Server ping outs are handled.
*/
/*
* Addon from adrian. We used to call this after nextping seconds,
* however I've changed it to run once a second. This is only for
* PING timeouts, not K/etc-line checks (thanks dianora!). Having it
* run once a second makes life a lot easier - when a new client connects
* and they need a ping in 4 seconds, if nextping was set to 20 seconds
* we end up waiting 20 seconds. This is stupid. :-)
* I will optimise (hah!) check_pings() once I've finished working on
* tidying up other network IO evilnesses.
* -- adrian
*/
static void
check_pings(void *notused)
{
check_pings_list(&lclient_list);
check_pings_list(&serv_list);
check_unknowns_list(&unknown_list);
}
/*
* Check_pings_list()
*
* inputs - pointer to list to check
* output - NONE
* side effects -
*/
static void
check_pings_list(rb_dlink_list * list)
{
char scratch[32]; /* way too generous but... */
struct Client *client_p; /* current local client_p being examined */
int ping = 0; /* ping time value from client */
rb_dlink_node *ptr, *next_ptr;
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
{
client_p = ptr->data;
if(!MyConnect(client_p) || IsDead(client_p))
continue;
ping = get_client_ping(client_p);
if(ping < (rb_current_time() - client_p->localClient->lasttime))
{
/*
* If the client/server hasnt talked to us in 2*ping seconds
* and it has a ping time, then close its connection.
*/
if(((rb_current_time() - client_p->localClient->lasttime) >= (2 * ping)
&& (client_p->flags & FLAGS_PINGSENT)))
{
if(IsServer(client_p))
{
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"No response from %s, closing link",
client_p->name);
ilog(L_SERVER,
"No response from %s, closing link",
log_client_name(client_p, HIDE_IP));
}
(void) snprintf(scratch, sizeof(scratch),
"Ping timeout: %d seconds",
(int) (rb_current_time() - client_p->localClient->lasttime));
exit_client(client_p, client_p, &me, scratch);
continue;
}
else if((client_p->flags & FLAGS_PINGSENT) == 0)
{
/*
* if we havent PINGed the connection and we havent
* heard from it in a while, PING it to make sure
* it is still alive.
*/
client_p->flags |= FLAGS_PINGSENT;
/* not nice but does the job */
client_p->localClient->lasttime = rb_current_time() - ping;
sendto_one(client_p, "PING :%s", me.name);
}
}
/* ping_timeout: */
}
}
/*
* check_unknowns_list
*
* inputs - pointer to list of unknown clients
* output - NONE
* side effects - unknown clients get marked for termination after n seconds
*/
static void
check_unknowns_list(rb_dlink_list * list)
{
rb_dlink_node *ptr, *next_ptr;
struct Client *client_p;
int timeout;
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
{
client_p = ptr->data;
if(IsDead(client_p) || IsClosing(client_p))
continue;
/* Still querying with authd */
if(client_p->preClient != NULL && client_p->preClient->auth.cid != 0)
continue;
/*
* Check UNKNOWN connections - if they have been in this state
* for > 30s, close them.
*/
timeout = IsAnyServer(client_p) ? ConfigFileEntry.connect_timeout : 30;
if((rb_current_time() - client_p->localClient->firsttime) > timeout)
{
if(IsAnyServer(client_p))
{
sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL,
"No response from %s, closing link",
client_p->name);
ilog(L_SERVER,
"No response from %s, closing link",
log_client_name(client_p, HIDE_IP));
}
exit_client(client_p, client_p, &me, "Connection timed out");
}
}
}
void
notify_banned_client(struct Client *client_p, struct ConfItem *aconf, int ban)
{
static const char conn_closed[] = "Connection closed";
static const char d_lined[] = "D-lined";
static const char k_lined[] = "K-lined";
const char *reason = NULL;
const char *exit_reason = conn_closed;
if(ConfigFileEntry.kline_with_reason)
{
reason = get_user_ban_reason(aconf);
exit_reason = reason;
}
else
{
reason = aconf->status == D_LINED ? d_lined : k_lined;
}
if(ban == D_LINED && !IsPerson(client_p))
sendto_one(client_p, "NOTICE DLINE :*** You have been D-lined");
else
sendto_one(client_p, form_str(ERR_YOUREBANNEDCREEP),
me.name, client_p->name, reason);
exit_client(client_p, client_p, &me,
EmptyString(ConfigFileEntry.kline_reason) ? exit_reason :
ConfigFileEntry.kline_reason);
}
/*
* check_banned_lines
* inputs - NONE
* output - NONE
* side effects - Check all connections for a pending k/dline against the
* client, exit the client if found.
*/
void
check_banned_lines(void)
{
check_dlines();
check_klines();
check_xlines();
}
/* check_klines
*
* inputs -
* outputs -
* side effects - all clients will be checked for klines
*/
void
check_klines(void)
{
struct Client *client_p;
struct ConfItem *aconf;
rb_dlink_node *ptr;
rb_dlink_node *next_ptr;
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, lclient_list.head)
{
client_p = ptr->data;
if(IsMe(client_p) || !IsPerson(client_p))
continue;
if((aconf = find_kline(client_p)) != NULL)
{
if(IsExemptKline(client_p))
{
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"KLINE over-ruled for %s, client is kline_exempt [%s@%s]",
get_client_name(client_p, HIDE_IP),
aconf->user, aconf->host);
continue;
}
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"KLINE active for %s",
get_client_name(client_p, HIDE_IP));
notify_banned_client(client_p, aconf, K_LINED);
continue;
}
}
}
/* check_one_kline()
*
* This process needs to be kept in sync with find_kline() aka find_conf_by_address().
*
* inputs - pointer to kline to check
* outputs -
* side effects - all clients will be checked against given kline
*/
void
check_one_kline(struct ConfItem *kline)
{
struct Client *client_p;
rb_dlink_node *ptr;
rb_dlink_node *next_ptr;
int masktype;
int bits;
struct rb_sockaddr_storage sockaddr;
struct sockaddr_in ip4;
masktype = parse_netmask(kline->host, (struct sockaddr_storage *)&sockaddr, &bits);
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, lclient_list.head)
{
int matched = 0;
client_p = ptr->data;
if(IsMe(client_p) || !IsPerson(client_p))
continue;
if(!match(kline->user, client_p->username))
continue;
/* match one kline */
switch (masktype) {
case HM_IPV4:
case HM_IPV6:
if (IsConfDoSpoofIp(client_p->localClient->att_conf) &&
IsConfKlineSpoof(client_p->localClient->att_conf))
continue;
if (client_p->localClient->ip.ss_family == AF_INET6 && sockaddr.ss_family == AF_INET &&
rb_ipv4_from_ipv6((struct sockaddr_in6 *)&client_p->localClient->ip, &ip4)
&& comp_with_mask_sock((struct sockaddr *)&ip4, (struct sockaddr *)&sockaddr, bits))
matched = 1;
else if (client_p->localClient->ip.ss_family == sockaddr.ss_family &&
comp_with_mask_sock((struct sockaddr *)&client_p->localClient->ip,
(struct sockaddr *)&sockaddr, bits))
matched = 1;
break;
case HM_HOST:
if (match(kline->host, client_p->orighost))
matched = 1;
if (IsConfDoSpoofIp(client_p->localClient->att_conf) &&
IsConfKlineSpoof(client_p->localClient->att_conf))
continue;
if (match(kline->host, client_p->sockhost))
matched = 1;
break;
}
if (!matched)
continue;
if(IsExemptKline(client_p))
{
sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
"KLINE over-ruled for %s, client is kline_exempt [%s@%s]",
get_client_name(client_p, HIDE_IP),
kline->user, kline->host);
continue;
}
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"KLINE active for %s",
get_client_name(client_p, HIDE_IP));
notify_banned_client(client_p, kline, K_LINED);
}
}
/* check_dlines()
*
* inputs -
* outputs -
* side effects - all clients will be checked for dlines
*/
void
check_dlines(void)
{
struct Client *client_p;
struct ConfItem *aconf;
rb_dlink_node *ptr;
rb_dlink_node *next_ptr;
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, lclient_list.head)
{
client_p = ptr->data;
if(IsMe(client_p))
continue;
if((aconf = find_dline((struct sockaddr *)&client_p->localClient->ip, GET_SS_FAMILY(&client_p->localClient->ip))) != NULL)
{
if(aconf->status & CONF_EXEMPTDLINE)
continue;
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"DLINE active for %s",
get_client_name(client_p, HIDE_IP));
notify_banned_client(client_p, aconf, D_LINED);
continue;
}
}
/* dlines need to be checked against unknowns too */
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, unknown_list.head)
{
client_p = ptr->data;
if((aconf = find_dline((struct sockaddr *)&client_p->localClient->ip, GET_SS_FAMILY(&client_p->localClient->ip))) != NULL)
{
if(aconf->status & CONF_EXEMPTDLINE)
continue;
notify_banned_client(client_p, aconf, D_LINED);
}
}
}
/* check_xlines
*
* inputs -
* outputs -
* side effects - all clients will be checked for xlines
*/
void
check_xlines(void)
{
struct Client *client_p;
struct ConfItem *aconf;
rb_dlink_node *ptr;
rb_dlink_node *next_ptr;
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, lclient_list.head)
{
client_p = ptr->data;
if(IsMe(client_p) || !IsPerson(client_p))
continue;
if((aconf = find_xline(client_p->info, 1)) != NULL)
{
if(IsExemptKline(client_p))
{
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"XLINE over-ruled for %s, client is kline_exempt [%s]",
get_client_name(client_p, HIDE_IP),
aconf->host);
continue;
}
sendto_realops_snomask(SNO_GENERAL, L_ALL, "XLINE active for %s",
get_client_name(client_p, HIDE_IP));
(void) exit_client(client_p, client_p, &me, "Bad user info");
continue;
}
}
}
/* resv_nick_fnc
*
* inputs - resv, reason, time
* outputs - NONE
* side effects - all local clients matching resv will be FNC'd
*/
void
resv_nick_fnc(const char *mask, const char *reason, int temp_time)
{
struct Client *client_p, *target_p;
rb_dlink_node *ptr;
rb_dlink_node *next_ptr;
char *nick;
char note[NICKLEN+10];
if (!ConfigFileEntry.resv_fnc)
return;
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, lclient_list.head)
{
client_p = ptr->data;
if(IsMe(client_p) || !IsPerson(client_p) || IsExemptResv(client_p))
continue;
/* Skip users that already have UID nicks. */
if(IsDigit(client_p->name[0]))
continue;
if(match_esc(mask, client_p->name))
{
nick = client_p->id;
/* Tell opers. */
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"RESV forced nick change for %s!%s@%s to %s; nick matched [%s] (%s)",
client_p->name, client_p->username, client_p->host, nick, mask, reason);
sendto_realops_snomask(SNO_NCHANGE, L_ALL,
"Nick change: From %s to %s [%s@%s]",
client_p->name, nick, client_p->username, client_p->host);
/* Tell the user. */
if (temp_time > 0)
{
sendto_one_notice(client_p,
":*** Nick %s is temporarily unavailable on this server.",
client_p->name);
}
else
{
sendto_one_notice(client_p,
":*** Nick %s is no longer available on this server.",
client_p->name);
}
/* Do all of the nick-changing gymnastics. */
client_p->tsinfo = rb_current_time();
whowas_add_history(client_p, 1);
monitor_signoff(client_p);
invalidate_bancache_user(client_p);
sendto_common_channels_local(client_p, NOCAPS, NOCAPS, ":%s!%s@%s NICK :%s",
client_p->name, client_p->username, client_p->host, nick);
sendto_server(client_p, NULL, CAP_TS6, NOCAPS, ":%s NICK %s :%ld",
use_id(client_p), nick, (long) client_p->tsinfo);
del_from_client_hash(client_p->name, client_p);
rb_strlcpy(client_p->name, nick, sizeof(client_p->name));
add_to_client_hash(nick, client_p);
monitor_signon(client_p);
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->on_allow_list.head)
{
target_p = ptr->data;
rb_dlinkFindDestroy(client_p, &target_p->localClient->allow_list);
rb_dlinkDestroy(ptr, &client_p->on_allow_list);
}
snprintf(note, sizeof(note), "Nick: %s", nick);
rb_note(client_p->localClient->F, note);
}
}
}
/*
* update_client_exit_stats
*
* input - pointer to client
* output - NONE
* side effects -
*/
static void
update_client_exit_stats(struct Client *client_p)
{
if(IsServer(client_p))
{
sendto_realops_snomask(SNO_EXTERNAL, L_ALL,
"Server %s split from %s",
client_p->name, client_p->servptr->name);
if(HasSentEob(client_p))
eob_count--;
}
else if(IsClient(client_p))
{
--Count.total;
if(IsOper(client_p))
--Count.oper;
if(IsInvisible(client_p))
--Count.invisi;
}
if(splitchecking && !splitmode)
check_splitmode(NULL);
}
/*
* release_client_state
*
* input - pointer to client to release
* output - NONE
* side effects -
*/
static void
release_client_state(struct Client *client_p)
{
if(client_p->user != NULL)
{
free_user(client_p->user, client_p); /* try this here */
}
if(client_p->serv)
{
if(client_p->serv->user != NULL)
free_user(client_p->serv->user, client_p);
if(client_p->serv->fullcaps)
rb_free(client_p->serv->fullcaps);
rb_free(client_p->serv);
}
}
/*
* remove_client_from_list
* inputs - point to client to remove
* output - NONE
* side effects - taken the code from ExitOneClient() for this
* and placed it here. - avalon
*/
static void
remove_client_from_list(struct Client *client_p)
{
s_assert(NULL != client_p);
if(client_p == NULL)
return;
/* A client made with make_client()
* is on the unknown_list until removed.
* If it =does= happen to exit before its removed from that list
* and its =not= on the global_client_list, it will core here.
* short circuit that case now -db
*/
if(client_p->node.prev == NULL && client_p->node.next == NULL)
return;
rb_dlinkDelete(&client_p->node, &global_client_list);
update_client_exit_stats(client_p);
}
/* clean_nick()
*
* input - nickname to check, flag for nick from local client
* output - 0 if erroneous, else 1
* side effects -
*/
int
clean_nick(const char *nick, int loc_client)
{
int len = 0;
/* nicks cant start with a digit or -, and must have a length */
if(*nick == '-' || *nick == '\0')
return 0;
if(loc_client && IsDigit(*nick))
return 0;
for(; *nick; nick++)
{
len++;
if(!IsNickChar(*nick))
return 0;
}
/* nicklen is +1 */
if(len >= NICKLEN && (unsigned int)len >= ConfigFileEntry.nicklen)
return 0;
return 1;
}
/*
* find_person - find person by (nick)name.
* inputs - pointer to name
* output - return client pointer
* side effects -
*/
struct Client *
find_person(const char *name)
{
struct Client *c2ptr;
c2ptr = find_client(name);
if(c2ptr && IsPerson(c2ptr))
return (c2ptr);
return (NULL);
}
struct Client *
find_named_person(const char *name)
{
struct Client *c2ptr;
c2ptr = find_named_client(name);
if(c2ptr && IsPerson(c2ptr))
return (c2ptr);
return (NULL);
}
/*
* find_chasing - find the client structure for a nick name (user)
* using history mechanism if necessary. If the client is not found,
* an error message (NO SUCH NICK) is generated. If the client was found
* through the history, chasing will be 1 and otherwise 0.
*/
struct Client *
find_chasing(struct Client *source_p, const char *user, int *chasing)
{
struct Client *who;
if(MyClient(source_p))
who = find_named_person(user);
else
who = find_person(user);
if(chasing)
*chasing = 0;
if(who || IsDigit(*user))
return who;
if(!(who = whowas_get_history(user, (long) KILLCHASETIMELIMIT)))
{
sendto_one_numeric(source_p, ERR_NOSUCHNICK,
form_str(ERR_NOSUCHNICK), user);
return (NULL);
}
if(chasing)
*chasing = 1;
return who;
}
/*
* get_client_name - Return the name of the client
* for various tracking and
* admin purposes. The main purpose of this function is to
* return the "socket host" name of the client, if that
* differs from the advertised name (other than case).
* But, this can be used to any client structure.
*
* NOTE 1:
* Watch out the allocation of "nbuf", if either source_p->name
* or source_p->sockhost gets changed into pointers instead of
* directly allocated within the structure...
*
* NOTE 2:
* Function return either a pointer to the structure (source_p) or
* to internal buffer (nbuf). *NEVER* use the returned pointer
* to modify what it points!!!
*/
const char *
get_client_name(struct Client *client, int showip)
{
static char nbuf[HOSTLEN * 2 + USERLEN + 5];
s_assert(NULL != client);
if(client == NULL)
return NULL;
if(MyConnect(client))
{
if(!irccmp(client->name, client->host))
return client->name;
if(ConfigFileEntry.hide_spoof_ips &&
showip == SHOW_IP && IsIPSpoof(client))
showip = MASK_IP;
if(IsAnyServer(client))
showip = MASK_IP;
/* And finally, let's get the host information, ip or name */
switch (showip)
{
case SHOW_IP:
snprintf(nbuf, sizeof(nbuf), "%s[%s@%s]",
client->name, client->username,
client->sockhost);
break;
case MASK_IP:
snprintf(nbuf, sizeof(nbuf), "%s[%s@255.255.255.255]",
client->name, client->username);
break;
default:
snprintf(nbuf, sizeof(nbuf), "%s[%s@%s]",
client->name, client->username, client->host);
}
return nbuf;
}
/* As pointed out by Adel Mezibra
* Neph|l|m@EFnet. Was missing a return here.
*/
return client->name;
}
/* log_client_name()
*
* This version is the same as get_client_name, but doesnt contain the
* code that will hide IPs always. This should be used for logfiles.
*/
const char *
log_client_name(struct Client *target_p, int showip)
{
static char nbuf[HOSTLEN * 2 + USERLEN + 5];
if(target_p == NULL)
return NULL;
if(MyConnect(target_p))
{
if(irccmp(target_p->name, target_p->host) == 0)
return target_p->name;
switch (showip)
{
case SHOW_IP:
snprintf(nbuf, sizeof(nbuf), "%s[%s@%s]", target_p->name,
target_p->username, target_p->sockhost);
break;
default:
snprintf(nbuf, sizeof(nbuf), "%s[%s@%s]", target_p->name,
target_p->username, target_p->host);
}
return nbuf;
}
return target_p->name;
}
/* is_remote_connect - Returns whether a server was /connect'ed by a remote
* oper (send notices netwide) */
int
is_remote_connect(struct Client *client_p)
{
struct Client *oper;
if (client_p->serv == NULL)
return FALSE;
oper = find_named_person(client_p->serv->by);
return oper != NULL && IsOper(oper) && !MyConnect(oper);
}
static void
free_exited_clients(void *unused)
{
rb_dlink_node *ptr, *next;
struct Client *target_p;
RB_DLINK_FOREACH_SAFE(ptr, next, dead_list.head)
{
target_p = ptr->data;
#ifdef DEBUG_EXITED_CLIENTS
{
struct abort_client *abt;
rb_dlink_node *aptr;
int found = 0;
RB_DLINK_FOREACH(aptr, abort_list.head)
{
abt = aptr->data;
if(abt->client == target_p)
{
s_assert(0);
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"On abort_list: %s stat: %u flags: %llu handler: %c",
target_p->name, (unsigned int) target_p->status,
(unsigned long long)target_p->flags, target_p->handler);
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"Please report this to the solanum developers!");
found++;
}
}
if(found)
{
rb_dlinkDestroy(ptr, &dead_list);
continue;
}
}
#endif
if(ptr->data == NULL)
{
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"Warning: null client on dead_list!");
rb_dlinkDestroy(ptr, &dead_list);
continue;
}
release_client_state(target_p);
free_client(target_p);
rb_dlinkDestroy(ptr, &dead_list);
}
#ifdef DEBUG_EXITED_CLIENTS
RB_DLINK_FOREACH_SAFE(ptr, next, dead_remote_list.head)
{
target_p = ptr->data;
if(ptr->data == NULL)
{
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"Warning: null client on dead_list!");
rb_dlinkDestroy(ptr, &dead_list);
continue;
}
release_client_state(target_p);
free_client(target_p);
rb_dlinkDestroy(ptr, &dead_remote_list);
}
#endif
}
/*
** Remove all clients that depend on source_p; assumes all (S)QUITs have
** already been sent. we make sure to exit a server's dependent clients
** and servers before the server itself; exit_one_client takes care of
** actually removing things off llists. tweaked from +CSr31 -orabidoo
*/
/*
* added sanity test code.... source_p->serv might be NULL...
*/
static void
recurse_remove_clients(struct Client *source_p, const char *comment)
{
struct Client *target_p;
rb_dlink_node *ptr, *ptr_next;
if(IsMe(source_p))
return;
if(source_p->serv == NULL) /* oooops. uh this is actually a major bug */
return;
/* this is very ugly, but it saves cpu :P */
if(ConfigFileEntry.nick_delay > 0)
{
RB_DLINK_FOREACH_SAFE(ptr, ptr_next, source_p->serv->users.head)
{
target_p = ptr->data;
target_p->flags |= FLAGS_KILLED;
add_nd_entry(target_p->name);
if(!IsDead(target_p) && !IsClosing(target_p))
exit_remote_client(NULL, target_p, &me, comment);
}
}
else
{
RB_DLINK_FOREACH_SAFE(ptr, ptr_next, source_p->serv->users.head)
{
target_p = ptr->data;
target_p->flags |= FLAGS_KILLED;
if(!IsDead(target_p) && !IsClosing(target_p))
exit_remote_client(NULL, target_p, &me, comment);
}
}
RB_DLINK_FOREACH_SAFE(ptr, ptr_next, source_p->serv->servers.head)
{
target_p = ptr->data;
recurse_remove_clients(target_p, comment);
qs_server(NULL, target_p, &me, comment);
}
}
/*
** Remove *everything* that depends on source_p, from all lists, and sending
** all necessary SQUITs. source_p itself is still on the lists,
** and its SQUITs have been sent except for the upstream one -orabidoo
*/
static void
remove_dependents(struct Client *client_p,
struct Client *source_p,
struct Client *from, const char *comment, const char *comment1)
{
struct Client *to;
rb_dlink_node *ptr, *next;
RB_DLINK_FOREACH_SAFE(ptr, next, serv_list.head)
{
to = ptr->data;
if(IsMe(to) || to == source_p->from || to == client_p)
continue;
sendto_one(to, "SQUIT %s :%s", get_id(source_p, to), comment);
}
recurse_remove_clients(source_p, comment1);
}
void
exit_aborted_clients(void *unused)
{
struct abort_client *abt;
rb_dlink_node *ptr, *next;
RB_DLINK_FOREACH_SAFE(ptr, next, abort_list.head)
{
abt = ptr->data;
#ifdef DEBUG_EXITED_CLIENTS
{
if(rb_dlinkFind(abt->client, &dead_list))
{
s_assert(0);
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"On dead_list: %s stat: %u flags: %llu handler: %c",
abt->client->name, (unsigned int) abt->client->status,
(unsigned long long)abt->client->flags, abt->client->handler);
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"Please report this to the solanum developers!");
continue;
}
}
#endif
s_assert(*((unsigned long*)abt->client) != 0xdeadbeef); /* This is lame but its a debug thing */
rb_dlinkDelete(ptr, &abort_list);
if(IsAnyServer(abt->client))
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"Closing link to %s: %s",
abt->client->name, abt->notice);
/* its no longer on abort list - we *must* remove
* FLAGS_CLOSING otherwise exit_client() will not run --fl
*/
abt->client->flags &= ~FLAGS_CLOSING;
exit_client(abt->client, abt->client, &me, abt->notice);
rb_free(abt);
}
}
/*
* dead_link - Adds client to a list of clients that need an exit_client()
*/
void
dead_link(struct Client *client_p, int sendqex)
{
struct abort_client *abt;
s_assert(!IsMe(client_p));
if(IsDead(client_p) || IsClosing(client_p) || IsMe(client_p))
return;
abt = (struct abort_client *) rb_malloc(sizeof(struct abort_client));
if(sendqex)
rb_strlcpy(abt->notice, "Max SendQ exceeded", sizeof(abt->notice));
else
snprintf(abt->notice, sizeof(abt->notice), "Write error: %s", strerror(errno));
abt->client = client_p;
SetIOError(client_p);
SetDead(client_p);
SetClosing(client_p);
rb_dlinkAdd(abt, &abt->node, &abort_list);
}
/* This does the remove of the user from channels..local or remote */
static inline void
exit_generic_client(struct Client *client_p, struct Client *source_p, struct Client *from,
const char *comment)
{
rb_dlink_node *ptr, *next_ptr;
if(IsOper(source_p))
rb_dlinkFindDestroy(source_p, &oper_list);
sendto_common_channels_local(source_p, NOCAPS, NOCAPS, ":%s!%s@%s QUIT :%s",
source_p->name,
source_p->username, source_p->host, comment);
remove_user_from_channels(source_p);
/* Should not be in any channels now */
s_assert(source_p->user->channel.head == NULL);
/* Clean up invitefield */
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, source_p->user->invited.head)
{
del_invite(ptr->data, source_p);
}
/* Clean up allow lists */
del_all_accepts(source_p);
whowas_add_history(source_p, 0);
whowas_off_history(source_p);
monitor_signoff(source_p);
if(has_id(source_p))
del_from_id_hash(source_p->id, source_p);
del_from_hostname_hash(source_p->orighost, source_p);
del_from_client_hash(source_p->name, source_p);
remove_client_from_list(source_p);
}
/*
* Assumes IsPerson(source_p) && !MyConnect(source_p)
*/
static int
exit_remote_client(struct Client *client_p, struct Client *source_p, struct Client *from,
const char *comment)
{
exit_generic_client(client_p, source_p, from, comment);
if(source_p->servptr && source_p->servptr->serv)
{
rb_dlinkDelete(&source_p->lnode, &source_p->servptr->serv->users);
}
if((source_p->flags & FLAGS_KILLED) == 0)
{
sendto_server(client_p, NULL, CAP_TS6, NOCAPS,
":%s QUIT :%s", use_id(source_p), comment);
}
SetDead(source_p);
#ifdef DEBUG_EXITED_CLIENTS
rb_dlinkAddAlloc(source_p, &dead_remote_list);
#else
rb_dlinkAddAlloc(source_p, &dead_list);
#endif
return(CLIENT_EXITED);
}
/*
* This assumes IsUnknown(source_p) == true and MyConnect(source_p) == true
*/
static int
exit_unknown_client(struct Client *client_p, /* The local client originating the
* exit or NULL, if this exit is
* generated by this server for
* internal reasons.
* This will not get any of the
* generated messages. */
struct Client *source_p, /* Client exiting */
struct Client *from, /* Client firing off this Exit,
* never NULL! */
const char *comment)
{
authd_abort_client(source_p);
rb_dlinkDelete(&source_p->localClient->tnode, &unknown_list);
if(!IsIOError(source_p))
sendto_one(source_p, "ERROR :Closing Link: %s (%s)",
source_p->user != NULL ? source_p->host : "127.0.0.1",
comment);
close_connection(source_p);
if(has_id(source_p))
del_from_id_hash(source_p->id, source_p);
del_from_hostname_hash(source_p->host, source_p);
if (!IsAnyServer(source_p))
del_from_client_hash(source_p->name, source_p);
remove_client_from_list(source_p);
SetDead(source_p);
rb_dlinkAddAlloc(source_p, &dead_list);
/* Note that we don't need to add unknowns to the dead_list */
return(CLIENT_EXITED);
}
static int
exit_remote_server(struct Client *client_p, struct Client *source_p, struct Client *from,
const char *comment)
{
static char comment1[(HOSTLEN*2)+2];
static char newcomment[BUFSIZE];
struct Client *target_p;
if(ConfigServerHide.flatten_links)
strcpy(comment1, "*.net *.split");
else
{
strcpy(comment1, source_p->servptr->name);
strcat(comment1, " ");
strcat(comment1, source_p->name);
}
if (IsPerson(from))
snprintf(newcomment, sizeof(newcomment), "by %s: %s",
from->name, comment);
remove_dependents(client_p, source_p, from, IsPerson(from) ? newcomment : comment, comment1);
rb_dlinkDelete(&source_p->lnode, &source_p->servptr->serv->servers);
rb_dlinkFindDestroy(source_p, &global_serv_list);
target_p = source_p->from;
if(target_p != NULL && IsServer(target_p) && target_p != client_p &&
!IsMe(target_p) && (source_p->flags & FLAGS_KILLED) == 0)
{
sendto_one(target_p, ":%s SQUIT %s :%s",
get_id(from, target_p), get_id(source_p, target_p),
comment);
}
if(has_id(source_p))
del_from_id_hash(source_p->id, source_p);
del_from_client_hash(source_p->name, source_p);
remove_client_from_list(source_p);
scache_split(source_p->serv->nameinfo);
SetDead(source_p);
#ifdef DEBUG_EXITED_CLIENTS
rb_dlinkAddAlloc(source_p, &dead_remote_list);
#else
rb_dlinkAddAlloc(source_p, &dead_list);
#endif
return 0;
}
static int
qs_server(struct Client *client_p, struct Client *source_p, struct Client *from,
const char *comment)
{
if(source_p->servptr && source_p->servptr->serv)
rb_dlinkDelete(&source_p->lnode, &source_p->servptr->serv->servers);
else
s_assert(0);
rb_dlinkFindDestroy(source_p, &global_serv_list);
if(has_id(source_p))
del_from_id_hash(source_p->id, source_p);
del_from_client_hash(source_p->name, source_p);
remove_client_from_list(source_p);
scache_split(source_p->serv->nameinfo);
SetDead(source_p);
rb_dlinkAddAlloc(source_p, &dead_list);
return 0;
}
static int
exit_local_server(struct Client *client_p, struct Client *source_p, struct Client *from,
const char *comment)
{
static char comment1[(HOSTLEN*2)+2];
static char newcomment[BUFSIZE];
unsigned int sendk, recvk;
rb_dlinkDelete(&source_p->localClient->tnode, &serv_list);
rb_dlinkFindDestroy(source_p, &global_serv_list);
sendk = source_p->localClient->sendK;
recvk = source_p->localClient->receiveK;
/* Always show source here, so the server notices show
* which side initiated the split -- jilles
*/
snprintf(newcomment, sizeof(newcomment), "by %s: %s",
from == source_p ? me.name : from->name, comment);
if (!IsIOError(source_p))
sendto_one(source_p, "SQUIT %s :%s", use_id(source_p),
newcomment);
if(client_p != NULL && source_p != client_p && !IsIOError(source_p))
{
sendto_one(source_p, "ERROR :Closing Link: 127.0.0.1 %s (%s)",
source_p->name, comment);
}
if(source_p->servptr && source_p->servptr->serv)
rb_dlinkDelete(&source_p->lnode, &source_p->servptr->serv->servers);
else
s_assert(0);
close_connection(source_p);
if(ConfigServerHide.flatten_links)
strcpy(comment1, "*.net *.split");
else
{
strcpy(comment1, source_p->servptr->name);
strcat(comment1, " ");
strcat(comment1, source_p->name);
}
if(source_p->serv != NULL)
remove_dependents(client_p, source_p, from, IsPerson(from) ? newcomment : comment, comment1);
sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s was connected"
" for %ld seconds. %d/%d sendK/recvK.",
source_p->name, (long) rb_current_time() - source_p->localClient->firsttime, sendk, recvk);
ilog(L_SERVER, "%s was connected for %ld seconds. %d/%d sendK/recvK.",
source_p->name, (long) rb_current_time() - source_p->localClient->firsttime, sendk, recvk);
if(has_id(source_p))
del_from_id_hash(source_p->id, source_p);
del_from_client_hash(source_p->name, source_p);
remove_client_from_list(source_p);
scache_split(source_p->serv->nameinfo);
SetDead(source_p);
rb_dlinkAddAlloc(source_p, &dead_list);
return 0;
}
/*
* This assumes IsPerson(source_p) == true && MyConnect(source_p) == true
*/
static int
exit_local_client(struct Client *client_p, struct Client *source_p, struct Client *from,
const char *comment)
{
unsigned long on_for;
char tbuf[26];
exit_generic_client(client_p, source_p, from, comment);
clear_monitor(source_p);
s_assert(IsPerson(source_p));
rb_dlinkDelete(&source_p->localClient->tnode, &lclient_list);
rb_dlinkDelete(&source_p->lnode, &me.serv->users);
if(IsOper(source_p))
rb_dlinkFindDestroy(source_p, &local_oper_list);
sendto_realops_snomask(SNO_CCONN, L_ALL,
"Client exiting: %s (%s@%s) [%s] [%s]",
source_p->name,
source_p->username, source_p->host, comment,
show_ip(NULL, source_p) ? source_p->sockhost : "255.255.255.255");
sendto_realops_snomask(SNO_CCONNEXT, L_ALL,
"CLIEXIT %s %s %s %s 0 %s",
source_p->name, source_p->username, source_p->host,
show_ip(NULL, source_p) ? source_p->sockhost : "255.255.255.255",
comment);
on_for = rb_current_time() - source_p->localClient->firsttime;
ilog(L_USER, "%s (%3lu:%02lu:%02lu): %s!%s@%s %s %d/%d",
rb_ctime(rb_current_time(), tbuf, sizeof(tbuf)), on_for / 3600,
(on_for % 3600) / 60, on_for % 60,
source_p->name, source_p->username, source_p->host,
source_p->sockhost,
source_p->localClient->sendK, source_p->localClient->receiveK);
sendto_one(source_p, "ERROR :Closing Link: %s (%s)", source_p->host, comment);
close_connection(source_p);
if((source_p->flags & FLAGS_KILLED) == 0)
{
sendto_server(client_p, NULL, CAP_TS6, NOCAPS,
":%s QUIT :%s", use_id(source_p), comment);
}
SetDead(source_p);
rb_dlinkAddAlloc(source_p, &dead_list);
return(CLIENT_EXITED);
}
/*
** exit_client - This is old "m_bye". Name changed, because this is not a
** protocol function, but a general server utility function.
**
** This function exits a client of *any* type (user, server, etc)
** from this server. Also, this generates all necessary prototol
** messages that this exit may cause.
**
** 1) If the client is a local client, then this implicitly
** exits all other clients depending on this connection (e.g.
** remote clients having 'from'-field that points to this.
**
** 2) If the client is a remote client, then only this is exited.
**
** For convenience, this function returns a suitable value for
** m_function return value:
**
** CLIENT_EXITED if (client_p == source_p)
** 0 if (client_p != source_p)
*/
int
exit_client(struct Client *client_p, /* The local client originating the
* exit or NULL, if this exit is
* generated by this server for
* internal reasons.
* This will not get any of the
* generated messages. */
struct Client *source_p, /* Client exiting */
struct Client *from, /* Client firing off this Exit,
* never NULL! */
const char *comment /* Reason for the exit */
)
{
int ret = -1;
hook_data_client_exit hdata;
if(IsClosing(source_p))
return -1;
/* note, this HAS to be here, when we exit a client we attempt to
* send them data, if this generates a write error we must *not* add
* them to the abort list --fl
*/
SetClosing(source_p);
hdata.local_link = client_p;
hdata.target = source_p;
hdata.from = from;
hdata.comment = comment;
call_hook(h_client_exit, &hdata);
if(MyConnect(source_p))
{
/* Local clients of various types */
if(IsPerson(source_p))
ret = exit_local_client(client_p, source_p, from, comment);
else if(IsServer(source_p))
ret = exit_local_server(client_p, source_p, from, comment);
/* IsUnknown || IsConnecting || IsHandShake */
else if(!IsReject(source_p))
ret = exit_unknown_client(client_p, source_p, from, comment);
}
else
{
/* Remotes */
if(IsPerson(source_p))
ret = exit_remote_client(client_p, source_p, from, comment);
else if(IsServer(source_p))
ret = exit_remote_server(client_p, source_p, from, comment);
}
call_hook(h_after_client_exit, NULL);
return ret;
}
/*
* Count up local client memory
*/
/* XXX one common Client list now */
void
count_local_client_memory(size_t * count, size_t * local_client_memory_used)
{
size_t lusage;
rb_bh_usage(lclient_heap, count, NULL, &lusage, NULL);
*local_client_memory_used = lusage + (*count * (sizeof(void *) + sizeof(struct Client)));
}
/*
* Count up remote client memory
*/
void
count_remote_client_memory(size_t * count, size_t * remote_client_memory_used)
{
size_t lcount, rcount;
rb_bh_usage(lclient_heap, &lcount, NULL, NULL, NULL);
rb_bh_usage(client_heap, &rcount, NULL, NULL, NULL);
*count = rcount - lcount;
*remote_client_memory_used = *count * (sizeof(void *) + sizeof(struct Client));
}
/*
* accept processing, this adds a form of "caller ID" to ircd
*
* If a client puts themselves into "caller ID only" mode,
* only clients that match a client pointer they have put on
* the accept list will be allowed to message them.
*
* [ source.on_allow_list ] -> [ target1 ] -> [ target2 ]
*
* [target.allow_list] -> [ source1 ] -> [source2 ]
*
* i.e. a target will have a link list of source pointers it will allow
* each source client then has a back pointer pointing back
* to the client that has it on its accept list.
* This allows for exit_one_client to remove these now bogus entries
* from any client having an accept on them.
*/
/*
* del_all_accepts
*
* inputs - pointer to exiting client
* output - NONE
* side effects - Walk through given clients allow_list and on_allow_list
* remove all references to this client
*/
void
del_all_accepts(struct Client *client_p)
{
rb_dlink_node *ptr;
rb_dlink_node *next_ptr;
struct Client *target_p;
if(MyClient(client_p) && client_p->localClient->allow_list.head)
{
/* clear this clients accept list, and remove them from
* everyones on_accept_list
*/
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->localClient->allow_list.head)
{
target_p = ptr->data;
rb_dlinkFindDestroy(client_p, &target_p->on_allow_list);
rb_dlinkDestroy(ptr, &client_p->localClient->allow_list);
}
}
/* remove this client from everyones accept list */
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->on_allow_list.head)
{
target_p = ptr->data;
rb_dlinkFindDestroy(client_p, &target_p->localClient->allow_list);
rb_dlinkDestroy(ptr, &client_p->on_allow_list);
}
}
/*
* show_ip() - asks if the true IP should be shown when source is
* asking for info about target
*
* Inputs - source_p who is asking
* - target_p who do we want the info on
* Output - returns 1 if clear IP can be shown, otherwise 0
* Side Effects - none
*/
int
show_ip(struct Client *source_p, struct Client *target_p)
{
if(IsAnyServer(target_p))
{
return 0;
}
else if(IsIPSpoof(target_p))
{
/* source == NULL indicates message is being sent
* to local opers.
*/
if(!ConfigFileEntry.hide_spoof_ips &&
(source_p == NULL || (MyConnect(source_p) && HasPrivilege(source_p, "auspex:hostname"))))
return 1;
return 0;
}
else if(IsDynSpoof(target_p) && (source_p != NULL && !HasPrivilege(source_p, "auspex:hostname")))
return 0;
else
return 1;
}
int
show_ip_conf(struct ConfItem *aconf, struct Client *source_p)
{
if(IsConfDoSpoofIp(aconf))
{
if(!ConfigFileEntry.hide_spoof_ips && MyOper(source_p))
return 1;
return 0;
}
else
return 1;
}
int
show_ip_whowas(struct Whowas *whowas, struct Client *source_p)
{
if(whowas->flags & WHOWAS_IP_SPOOFING)
if(ConfigFileEntry.hide_spoof_ips || !MyOper(source_p))
return 0;
if(whowas->flags & WHOWAS_DYNSPOOF)
if(!IsOper(source_p))
return 0;
return 1;
}
/*
* make_user
*
* inputs - pointer to client struct
* output - pointer to struct User
* side effects - add's an User information block to a client
* if it was not previously allocated.
*/
struct User *
make_user(struct Client *client_p)
{
struct User *user;
user = client_p->user;
if(!user)
{
user = (struct User *) rb_bh_alloc(user_heap);
user->refcnt = 1;
client_p->user = user;
}
return user;
}
/*
* make_server
*
* inputs - pointer to client struct
* output - pointer to server_t
* side effects - add's an Server information block to a client
* if it was not previously allocated.
*/
struct Server *
make_server(struct Client *client_p)
{
struct Server *serv = client_p->serv;
if(!serv)
{
serv = (struct Server *) rb_malloc(sizeof(struct Server));
client_p->serv = serv;
}
return client_p->serv;
}
/*
* free_user
*
* inputs - pointer to user struct
* - pointer to client struct
* output - none
* side effects - Decrease user reference count by one and release block,
* if count reaches 0
*/
void
free_user(struct User *user, struct Client *client_p)
{
free_away(client_p);
if(--user->refcnt <= 0)
{
if(user->away)
rb_free((char *) user->away);
rb_free(user->opername);
if (user->privset)
privilegeset_unref(user->privset);
/*
* sanity check
*/
if(user->refcnt < 0 || user->invited.head || user->channel.head)
{
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"* %p user (%s!%s@%s) %p %p %p %lu %d *",
client_p,
client_p ? client_p->
name : "<noname>",
client_p->username,
client_p->host,
user,
user->invited.head,
user->channel.head,
rb_dlink_list_length(&user->channel),
user->refcnt);
s_assert(!user->refcnt);
s_assert(!user->invited.head);
s_assert(!user->channel.head);
}
rb_bh_free(user_heap, user);
}
}
void
allocate_away(struct Client *client_p)
{
if(client_p->user->away == NULL)
client_p->user->away = rb_bh_alloc(away_heap);
}
void
free_away(struct Client *client_p)
{
if(client_p->user != NULL && client_p->user->away != NULL) {
rb_bh_free(away_heap, client_p->user->away);
client_p->user->away = NULL;
}
}
void
init_uid(void)
{
int i;
for(i = 0; i < 3; i++)
current_uid[i] = me.id[i];
for(i = 3; i < 9; i++)
current_uid[i] = 'A';
current_uid[9] = '\0';
}
char *
generate_uid(void)
{
static int flipped = 0;
int i;
uid_restart:
for(i = 8; i > 3; i--)
{
if(current_uid[i] == 'Z')
{
current_uid[i] = '0';
goto out;
}
else if(current_uid[i] != '9')
{
current_uid[i]++;
goto out;
}
else
current_uid[i] = 'A';
}
/* if this next if() triggers, we're fucked. */
if(current_uid[3] == 'Z')
{
current_uid[i] = 'A';
flipped = 1;
}
else
current_uid[i]++;
out:
/* if this happens..well, i'm not sure what to say, but lets handle it correctly */
if(rb_unlikely(flipped))
{
/* this slows down uid generation a bit... */
if(find_id(current_uid) != NULL)
goto uid_restart;
}
return current_uid;
}
/*
* close_connection
* Close the physical connection. This function must make
* MyConnect(client_p) == FALSE, and set client_p->from == NULL.
*/
void
close_connection(struct Client *client_p)
{
s_assert(client_p != NULL);
if(client_p == NULL)
return;
s_assert(MyConnect(client_p));
if(!MyConnect(client_p))
return;
if(IsServer(client_p))
{
struct server_conf *server_p;
ServerStats.is_sv++;
ServerStats.is_sbs += client_p->localClient->sendB;
ServerStats.is_sbr += client_p->localClient->receiveB;
ServerStats.is_sti += (unsigned long long)(rb_current_time() - client_p->localClient->firsttime);
/*
* If the connection has been up for a long amount of time, schedule
* a 'quick' reconnect, else reset the next-connect cycle.
*/
if((server_p = find_server_conf(client_p->name)) != NULL)
{
/*
* Reschedule a faster reconnect, if this was a automatically
* connected configuration entry. (Note that if we have had
* a rehash in between, the status has been changed to
* CONF_ILLEGAL). But only do this if it was a "good" link.
*/
server_p->hold = time(NULL);
server_p->hold +=
(server_p->hold - client_p->localClient->lasttime >
HANGONGOODLINK) ? HANGONRETRYDELAY : ConFreq(server_p->class);
}
}
else if(IsClient(client_p))
{
ServerStats.is_cl++;
ServerStats.is_cbs += client_p->localClient->sendB;
ServerStats.is_cbr += client_p->localClient->receiveB;
ServerStats.is_cti += (unsigned long long)(rb_current_time() - client_p->localClient->firsttime);
}
else
ServerStats.is_ni++;
client_release_connids(client_p);
if(client_p->localClient->F != NULL)
{
/* attempt to flush any pending dbufs. Evil, but .. -- adrian */
if(!IsIOError(client_p))
send_queued(client_p);
rb_close(client_p->localClient->F);
client_p->localClient->F = NULL;
}
rb_linebuf_donebuf(&client_p->localClient->buf_sendq);
rb_linebuf_donebuf(&client_p->localClient->buf_recvq);
detach_conf(client_p);
/* XXX shouldnt really be done here. */
detach_server_conf(client_p);
client_p->from = NULL; /* ...this should catch them! >:) --msa */
ClearMyConnect(client_p);
SetIOError(client_p);
}
void
error_exit_client(struct Client *client_p, int error)
{
/*
* ...hmm, with non-blocking sockets we might get
* here from quite valid reasons, although.. why
* would select report "data available" when there
* wasn't... so, this must be an error anyway... --msa
* actually, EOF occurs when read() returns 0 and
* in due course, select() returns that fd as ready
* for reading even though it ends up being an EOF. -avalon
*/
char errmsg[255];
int current_error = rb_get_sockerr(client_p->localClient->F);
SetIOError(client_p);
if(IsServer(client_p) || IsHandshake(client_p))
{
if(error == 0)
{
sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) && !IsServer(client_p) ? L_NETWIDE : L_ALL,
"Server %s closed the connection",
client_p->name);
ilog(L_SERVER, "Server %s closed the connection",
log_client_name(client_p, SHOW_IP));
}
else
{
sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) && !IsServer(client_p) ? L_NETWIDE : L_ALL,
"Lost connection to %s: %s",
client_p->name, strerror(current_error));
ilog(L_SERVER, "Lost connection to %s: %s",
log_client_name(client_p, SHOW_IP), strerror(current_error));
}
}
if(error == 0)
rb_strlcpy(errmsg, "Remote host closed the connection", sizeof(errmsg));
else
snprintf(errmsg, sizeof(errmsg), "Read error: %s", strerror(current_error));
exit_client(client_p, client_p, &me, errmsg);
}
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