2 * ircd-ratbox: A slightly useful ircd.
3 * s_serv.c: Server related functions.
5 * Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
6 * Copyright (C) 1996-2002 Hybrid Development Team
7 * Copyright (C) 2002-2005 ircd-ratbox development team
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
24 * $Id: s_serv.c 3550 2007-08-09 06:47:26Z nenolod $
30 #include <openssl/rsa.h>
40 #include "ircd_defs.h"
45 #include "s_newconf.h"
52 #include "channel.h" /* chcap_usage_counts stuff... */
59 #define INADDR_NONE ((unsigned int) 0xffffffff)
62 #ifndef HAVE_SOCKETPAIR
63 static int inet_socketpair(int d
, int type
, int protocol
, int sv
[2]);
66 int MaxConnectionCount
= 1;
67 int MaxClientCount
= 1;
68 int refresh_user_links
= 0;
70 static char buf
[BUFSIZE
];
73 * list of recognized server capabilities. "TS" is not on the list
74 * because all servers that we talk to already do TS, and the kludged
75 * extra argument to "PASS" takes care of checking that. -orabidoo
77 struct Capability captab
[] = {
84 { "KNOCK", CAP_KNOCK
},
87 { "UNKLN", CAP_UNKLN
},
88 { "CLUSTER", CAP_CLUSTER
},
89 { "ENCAP", CAP_ENCAP
},
90 { "SERVICES", CAP_SERVICE
},
91 { "RSFNC", CAP_RSFNC
},
97 static CNCB serv_connect_callback
;
98 static CNCB serv_connect_ssl_callback
;
101 * hunt_server - Do the basic thing in delivering the message (command)
102 * across the relays to the specific server (server) for
105 * Note: The command is a format string and *MUST* be
106 * of prefixed style (e.g. ":%s COMMAND %s ...").
107 * Command can have only max 8 parameters.
109 * server parv[server] is the parameter identifying the
113 * parv[server] is replaced with the pointer to the
114 * real servername from the matched client (I'm lazy
117 * returns: (see #defines)
120 hunt_server(struct Client
*client_p
, struct Client
*source_p
,
121 const char *command
, int server
, int parc
, const char *parv
[])
123 struct Client
*target_p
;
130 * Assume it's me, if no server
132 if(parc
<= server
|| EmptyString(parv
[server
]) ||
133 match(parv
[server
], me
.name
) || (strcmp(parv
[server
], me
.id
) == 0))
134 return (HUNTED_ISME
);
136 new = LOCAL_COPY(parv
[server
]);
139 * These are to pickup matches that would cause the following
140 * message to go in the wrong direction while doing quick fast
141 * non-matching lookups.
143 if(MyClient(source_p
))
144 target_p
= find_named_client(new);
146 target_p
= find_client(new);
149 if(target_p
->from
== source_p
->from
&& !MyConnect(target_p
))
153 wilds
= (strchr(new, '?') || strchr(new, '*'));
156 * Again, if there are no wild cards involved in the server
157 * name, use the hash lookup
163 if(MyClient(source_p
) || !IsDigit(parv
[server
][0]))
164 sendto_one_numeric(source_p
, ERR_NOSUCHSERVER
,
165 form_str(ERR_NOSUCHSERVER
),
167 return (HUNTED_NOSUCH
);
173 RB_DLINK_FOREACH(ptr
, global_client_list
.head
)
175 if(match(new, ((struct Client
*) (ptr
->data
))->name
))
177 target_p
= ptr
->data
;
186 if(!IsRegistered(target_p
))
188 sendto_one_numeric(source_p
, ERR_NOSUCHSERVER
,
189 form_str(ERR_NOSUCHSERVER
),
191 return HUNTED_NOSUCH
;
194 if(IsMe(target_p
) || MyClient(target_p
))
198 parv
[server
] = get_id(target_p
, target_p
);
200 sendto_one(target_p
, command
, get_id(source_p
, target_p
),
201 parv
[1], parv
[2], parv
[3], parv
[4], parv
[5], parv
[6], parv
[7], parv
[8]);
203 return (HUNTED_PASS
);
206 if(MyClient(source_p
) || !IsDigit(parv
[server
][0]))
207 sendto_one_numeric(source_p
, ERR_NOSUCHSERVER
,
208 form_str(ERR_NOSUCHSERVER
), parv
[server
]);
209 return (HUNTED_NOSUCH
);
213 * try_connections - scan through configuration and try new connections.
214 * Returns the calendar time when the next call to this
215 * function should be made latest. (No harm done if this
216 * is called earlier or later...)
219 try_connections(void *unused
)
221 struct Client
*client_p
;
222 struct server_conf
*server_p
= NULL
;
223 struct server_conf
*tmp_p
;
226 int connecting
= FALSE
;
230 RB_DLINK_FOREACH(ptr
, server_conf_list
.head
)
234 if(ServerConfIllegal(tmp_p
) || !ServerConfAutoconn(tmp_p
))
237 /* don't allow ssl connections if ssl isn't setup */
238 if(ServerConfSSL(tmp_p
) && (!ssl_ok
|| !get_ssld_count()))
241 cltmp
= tmp_p
->class;
244 * Skip this entry if the use of it is still on hold until
245 * future. Otherwise handle this entry (and set it on hold
246 * until next time). Will reset only hold times, if already
247 * made one successfull connection... [this algorithm is
248 * a bit fuzzy... -- msa >;) ]
250 if(tmp_p
->hold
> rb_current_time())
252 if(next
> tmp_p
->hold
|| next
== 0)
257 confrq
= get_con_freq(cltmp
);
258 tmp_p
->hold
= rb_current_time() + confrq
;
261 * Found a CONNECT config with port specified, scan clients
262 * and see if this server is already connected?
264 client_p
= find_server(NULL
, tmp_p
->name
);
266 if(!client_p
&& (CurrUsers(cltmp
) < MaxUsers(cltmp
)) && !connecting
)
270 /* We connect only one at time... */
274 if((next
> tmp_p
->hold
) || (next
== 0))
278 /* TODO: change this to set active flag to 0 when added to event! --Habeeb */
279 if(GlobalSetOptions
.autoconn
== 0)
285 /* move this connect entry to end.. */
286 rb_dlinkDelete(&server_p
->node
, &server_conf_list
);
287 rb_dlinkAddTail(server_p
, &server_p
->node
, &server_conf_list
);
290 * We used to only print this if serv_connect() actually
291 * suceeded, but since rb_tcp_connect() can call the callback
292 * immediately if there is an error, we were getting error messages
293 * in the wrong order. SO, we just print out the activated line,
294 * and let serv_connect() / serv_connect_callback() print an
295 * error afterwards if it fails.
298 sendto_realops_snomask(SNO_GENERAL
, L_ALL
,
299 "Connection to %s activated",
302 serv_connect(server_p
, 0);
306 check_server(const char *name
, struct Client
*client_p
)
308 struct server_conf
*server_p
= NULL
;
309 struct server_conf
*tmp_p
;
313 s_assert(NULL
!= client_p
);
317 if(!(client_p
->localClient
->passwd
))
320 if(strlen(name
) > HOSTLEN
)
323 RB_DLINK_FOREACH(ptr
, server_conf_list
.head
)
327 if(ServerConfIllegal(tmp_p
))
330 if(!match(tmp_p
->name
, name
))
335 /* XXX: Fix me for IPv6 */
336 /* XXX sockhost is the IPv4 ip as a string */
337 if(match(tmp_p
->host
, client_p
->host
) ||
338 match(tmp_p
->host
, client_p
->sockhost
))
342 if(ServerConfEncrypted(tmp_p
))
344 if(!strcmp(tmp_p
->passwd
, rb_crypt(client_p
->localClient
->passwd
,
351 else if(!strcmp(tmp_p
->passwd
, client_p
->localClient
->passwd
))
362 if(ServerConfSSL(server_p
) && client_p
->localClient
->ssl_ctl
== NULL
)
367 attach_server_conf(client_p
, server_p
);
369 /* clear ZIP/TB if they support but we dont want them */
371 if(!ServerConfCompressed(server_p
))
373 ClearCap(client_p
, CAP_ZIP
);
375 if(!ServerConfTb(server_p
))
376 ClearCap(client_p
, CAP_TB
);
384 * inputs - Client pointer to send to
385 * - int flag of capabilities that this server has
387 * side effects - send the CAPAB line to a server -orabidoo
391 send_capabilities(struct Client
*client_p
, int cap_can_send
)
393 struct Capability
*cap
;
394 char msgbuf
[BUFSIZE
];
400 for (cap
= captab
; cap
->name
; ++cap
)
402 if(cap
->cap
& cap_can_send
)
404 tl
= rb_sprintf(t
, "%s ", cap
->name
);
412 sendto_one(client_p
, "CAPAB :%s", msgbuf
);
417 * input - client to burst to, channel name, list to burst, mode flag
419 * side effects - client is sent a list of +b, +e, or +I modes
422 burst_modes_TS6(struct Client
*client_p
, struct Channel
*chptr
,
423 rb_dlink_list
*list
, char flag
)
432 cur_len
= mlen
= rb_sprintf(buf
, ":%s BMASK %ld %s %c :",
433 me
.id
, (long) chptr
->channelts
, chptr
->chname
, flag
);
436 RB_DLINK_FOREACH(ptr
, list
->head
)
440 tlen
= strlen(banptr
->banstr
) + 1;
443 if(cur_len
+ tlen
> BUFSIZE
- 3)
445 /* the one we're trying to send doesnt fit at all! */
452 /* chop off trailing space and send.. */
454 sendto_one(client_p
, "%s", buf
);
459 rb_sprintf(t
, "%s ", banptr
->banstr
);
464 /* cant ever exit the loop above without having modified buf,
465 * chop off trailing space and send.
468 sendto_one(client_p
, "%s", buf
);
474 * inputs - client (server) to send nick towards
475 * - client to send nick for
477 * side effects - NICK message is sent towards given client_p
480 burst_TS6(struct Client
*client_p
)
482 static char ubuf
[12];
483 struct Client
*target_p
;
484 struct Channel
*chptr
;
485 struct membership
*msptr
;
486 hook_data_client hclientinfo
;
487 hook_data_channel hchaninfo
;
494 hclientinfo
.client
= hchaninfo
.client
= client_p
;
496 RB_DLINK_FOREACH(ptr
, global_client_list
.head
)
498 target_p
= ptr
->data
;
500 if(!IsPerson(target_p
))
503 send_umode(NULL
, target_p
, 0, 0, ubuf
);
510 if(has_id(target_p
) && IsCapable(client_p
, CAP_EUID
))
511 sendto_one(client_p
, ":%s EUID %s %d %ld %s %s %s %s %s %s %s :%s",
512 target_p
->servptr
->id
, target_p
->name
,
513 target_p
->hopcount
+ 1,
514 (long) target_p
->tsinfo
, ubuf
,
515 target_p
->username
, target_p
->host
,
516 IsIPSpoof(target_p
) ? "0" : target_p
->sockhost
,
518 IsDynSpoof(target_p
) ? target_p
->orighost
: "*",
519 EmptyString(target_p
->user
->suser
) ? "*" : target_p
->user
->suser
,
521 else if(has_id(target_p
))
522 sendto_one(client_p
, ":%s UID %s %d %ld %s %s %s %s %s :%s",
523 target_p
->servptr
->id
, target_p
->name
,
524 target_p
->hopcount
+ 1,
525 (long) target_p
->tsinfo
, ubuf
,
526 target_p
->username
, target_p
->host
,
527 IsIPSpoof(target_p
) ? "0" : target_p
->sockhost
,
528 target_p
->id
, target_p
->info
);
530 sendto_one(client_p
, "NICK %s %d %ld %s %s %s %s :%s",
532 target_p
->hopcount
+ 1,
533 (long) target_p
->tsinfo
,
535 target_p
->username
, target_p
->host
,
536 target_p
->servptr
->name
, target_p
->info
);
538 if(!has_id(target_p
) || !IsCapable(client_p
, CAP_EUID
))
540 if(IsDynSpoof(target_p
))
541 sendto_one(client_p
, ":%s ENCAP * REALHOST %s",
542 use_id(target_p
), target_p
->orighost
);
543 if(!EmptyString(target_p
->user
->suser
))
544 sendto_one(client_p
, ":%s ENCAP * LOGIN %s",
545 use_id(target_p
), target_p
->user
->suser
);
548 if(ConfigFileEntry
.burst_away
&& !EmptyString(target_p
->user
->away
))
549 sendto_one(client_p
, ":%s AWAY :%s",
551 target_p
->user
->away
);
553 hclientinfo
.target
= target_p
;
554 call_hook(h_burst_client
, &hclientinfo
);
557 RB_DLINK_FOREACH(ptr
, global_channel_list
.head
)
561 if(*chptr
->chname
!= '#')
564 cur_len
= mlen
= rb_sprintf(buf
, ":%s SJOIN %ld %s %s :", me
.id
,
565 (long) chptr
->channelts
, chptr
->chname
,
566 channel_modes(chptr
, client_p
));
570 RB_DLINK_FOREACH(uptr
, chptr
->members
.head
)
574 tlen
= strlen(use_id(msptr
->client_p
)) + 1;
580 if(cur_len
+ tlen
>= BUFSIZE
- 3)
583 sendto_one(client_p
, "%s", buf
);
588 rb_sprintf(t
, "%s%s ", find_channel_status(msptr
, 1),
589 use_id(msptr
->client_p
));
595 if (rb_dlink_list_length(&chptr
->members
) > 0)
597 /* remove trailing space */
600 sendto_one(client_p
, "%s", buf
);
602 if(rb_dlink_list_length(&chptr
->banlist
) > 0)
603 burst_modes_TS6(client_p
, chptr
, &chptr
->banlist
, 'b');
605 if(IsCapable(client_p
, CAP_EX
) &&
606 rb_dlink_list_length(&chptr
->exceptlist
) > 0)
607 burst_modes_TS6(client_p
, chptr
, &chptr
->exceptlist
, 'e');
609 if(IsCapable(client_p
, CAP_IE
) &&
610 rb_dlink_list_length(&chptr
->invexlist
) > 0)
611 burst_modes_TS6(client_p
, chptr
, &chptr
->invexlist
, 'I');
613 if(rb_dlink_list_length(&chptr
->quietlist
) > 0)
614 burst_modes_TS6(client_p
, chptr
, &chptr
->quietlist
, 'q');
616 if(IsCapable(client_p
, CAP_TB
) && chptr
->topic
!= NULL
)
617 sendto_one(client_p
, ":%s TB %s %ld %s%s:%s",
618 me
.id
, chptr
->chname
, (long) chptr
->topic_time
,
619 ConfigChannel
.burst_topicwho
? chptr
->topic_info
: "",
620 ConfigChannel
.burst_topicwho
? " " : "",
623 hchaninfo
.chptr
= chptr
;
624 call_hook(h_burst_channel
, &hchaninfo
);
627 hclientinfo
.target
= NULL
;
628 call_hook(h_burst_finished
, &hclientinfo
);
632 * show_capabilities - show current server capabilities
634 * inputs - pointer to an struct Client
635 * output - pointer to static string
636 * side effects - build up string representing capabilities of server listed
639 show_capabilities(struct Client
*target_p
)
641 static char msgbuf
[BUFSIZE
];
642 struct Capability
*cap
;
645 rb_strlcpy(msgbuf
, " TS6", sizeof(msgbuf
));
648 rb_strlcat(msgbuf
, " SSL", sizeof(msgbuf
));
650 if(!IsServer(target_p
) || !target_p
->serv
->caps
) /* short circuit if no caps */
653 for (cap
= captab
; cap
->cap
; ++cap
)
655 if(cap
->cap
& target_p
->serv
->caps
)
656 rb_snprintf_append(msgbuf
, sizeof(msgbuf
), " %s", cap
->name
);
665 * inputs - pointer to a struct Client
670 server_estab(struct Client
*client_p
)
672 struct Client
*target_p
;
673 struct server_conf
*server_p
;
674 hook_data_client hdata
;
677 char note
[HOSTLEN
+ 15];
679 s_assert(NULL
!= client_p
);
683 host
= client_p
->name
;
685 if((server_p
= client_p
->localClient
->att_sconf
) == NULL
)
687 /* This shouldn't happen, better tell the ops... -A1kmm */
688 sendto_realops_snomask(SNO_GENERAL
, is_remote_connect(client_p
) ? L_NETWIDE
: L_ALL
,
689 "Warning: Lost connect{} block for server %s!", host
);
690 return exit_client(client_p
, client_p
, client_p
, "Lost connect{} block!");
693 /* We shouldn't have to check this, it should already done before
694 * server_estab is called. -A1kmm
696 if(client_p
->localClient
->passwd
)
698 memset(client_p
->localClient
->passwd
, 0, strlen(client_p
->localClient
->passwd
));
699 rb_free(client_p
->localClient
->passwd
);
700 client_p
->localClient
->passwd
= NULL
;
703 /* Its got identd , since its a server */
706 /* If there is something in the serv_list, it might be this
707 * connecting server..
709 if(!ServerInfo
.hub
&& serv_list
.head
)
711 if(client_p
!= serv_list
.head
->data
|| serv_list
.head
->next
)
713 ServerStats
.is_ref
++;
714 sendto_one(client_p
, "ERROR :I'm a leaf not a hub");
715 return exit_client(client_p
, client_p
, client_p
, "I'm a leaf");
719 if(IsUnknown(client_p
))
722 * jdc -- 1. Use EmptyString(), not [0] index reference.
723 * 2. Check ->spasswd, not ->passwd.
725 if(!EmptyString(server_p
->spasswd
))
727 sendto_one(client_p
, "PASS %s TS %d :%s",
728 server_p
->spasswd
, TS_CURRENT
, me
.id
);
731 /* pass info to new server */
732 send_capabilities(client_p
, default_server_capabs
733 | (ServerConfCompressed(server_p
) ? CAP_ZIP_SUPPORTED
: 0)
734 | (ServerConfTb(server_p
) ? CAP_TB
: 0));
736 sendto_one(client_p
, "SERVER %s 1 :%s%s",
738 ConfigServerHide
.hidden
? "(H) " : "",
739 (me
.info
[0]) ? (me
.info
) : "IRCers United");
742 if(!rb_set_buffers(client_p
->localClient
->F
, READBUF_SIZE
))
743 ilog_error("rb_set_buffers failed for server");
745 /* Enable compression now */
746 if(IsCapable(client_p
, CAP_ZIP
))
748 start_zlib_session(client_p
);
750 sendto_one(client_p
, "SVINFO %d %d 0 :%ld", TS_CURRENT
, TS_MIN
, (long int)rb_current_time());
752 client_p
->servptr
= &me
;
754 if(IsAnyDead(client_p
))
755 return CLIENT_EXITED
;
759 /* Update the capability combination usage counts */
760 set_chcap_usage_counts(client_p
);
762 rb_dlinkAdd(client_p
, &client_p
->lnode
, &me
.serv
->servers
);
763 del_unknown_ip(client_p
);
764 rb_dlinkMoveNode(&client_p
->localClient
->tnode
, &unknown_list
, &serv_list
);
765 rb_dlinkAddTailAlloc(client_p
, &global_serv_list
);
768 add_to_id_hash(client_p
->id
, client_p
);
770 add_to_client_hash(client_p
->name
, client_p
);
771 /* doesnt duplicate client_p->serv if allocated this struct already */
772 make_server(client_p
);
774 client_p
->serv
->caps
= client_p
->localClient
->caps
;
776 if(client_p
->localClient
->fullcaps
)
778 client_p
->serv
->fullcaps
= rb_strdup(client_p
->localClient
->fullcaps
);
779 rb_free(client_p
->localClient
->fullcaps
);
780 client_p
->localClient
->fullcaps
= NULL
;
783 client_p
->serv
->nameinfo
= scache_connect(client_p
->name
, client_p
->info
, IsHidden(client_p
));
784 client_p
->localClient
->firsttime
= rb_current_time();
785 /* fixing eob timings.. -gnp */
787 if((rb_dlink_list_length(&lclient_list
) + rb_dlink_list_length(&serv_list
)) >
788 (unsigned long)MaxConnectionCount
)
789 MaxConnectionCount
= rb_dlink_list_length(&lclient_list
) +
790 rb_dlink_list_length(&serv_list
);
792 /* Show the real host/IP to admins */
793 sendto_realops_snomask(SNO_GENERAL
, L_ALL
,
794 "Link with %s established: (%s) link",
796 show_capabilities(client_p
));
798 ilog(L_SERVER
, "Link with %s established: (%s) link",
799 log_client_name(client_p
, SHOW_IP
), show_capabilities(client_p
));
802 hdata
.target
= client_p
;
803 call_hook(h_server_introduced
, &hdata
);
805 rb_snprintf(note
, sizeof(note
), "Server: %s", client_p
->name
);
806 rb_note(client_p
->localClient
->F
, note
);
809 ** Old sendto_serv_but_one() call removed because we now
810 ** need to send different names to different servers
811 ** (domain name matching) Send new server to other servers.
813 RB_DLINK_FOREACH(ptr
, serv_list
.head
)
815 target_p
= ptr
->data
;
817 if(target_p
== client_p
)
820 if(has_id(target_p
) && has_id(client_p
))
822 sendto_one(target_p
, ":%s SID %s 2 %s :%s%s",
823 me
.id
, client_p
->name
, client_p
->id
,
824 IsHidden(client_p
) ? "(H) " : "", client_p
->info
);
826 if(IsCapable(target_p
, CAP_ENCAP
) &&
827 !EmptyString(client_p
->serv
->fullcaps
))
828 sendto_one(target_p
, ":%s ENCAP * GCAP :%s",
829 client_p
->id
, client_p
->serv
->fullcaps
);
833 sendto_one(target_p
, ":%s SERVER %s 2 :%s%s",
834 me
.name
, client_p
->name
,
835 IsHidden(client_p
) ? "(H) " : "", client_p
->info
);
837 if(IsCapable(target_p
, CAP_ENCAP
) &&
838 !EmptyString(client_p
->serv
->fullcaps
))
839 sendto_one(target_p
, ":%s ENCAP * GCAP :%s",
840 client_p
->name
, client_p
->serv
->fullcaps
);
845 ** Pass on my client information to the new server
847 ** First, pass only servers (idea is that if the link gets
848 ** cancelled beacause the server was already there,
849 ** there are no NICK's to be cancelled...). Of course,
850 ** if cancellation occurs, all this info is sent anyway,
851 ** and I guess the link dies when a read is attempted...? --msa
853 ** Note: Link cancellation to occur at this point means
854 ** that at least two servers from my fragment are building
855 ** up connection this other fragment at the same time, it's
856 ** a race condition, not the normal way of operation...
858 ** ALSO NOTE: using the get_client_name for server names--
859 ** see previous *WARNING*!!! (Also, original inpath
862 RB_DLINK_FOREACH(ptr
, global_serv_list
.head
)
864 target_p
= ptr
->data
;
866 /* target_p->from == target_p for target_p == client_p */
867 if(IsMe(target_p
) || target_p
->from
== client_p
)
870 /* presumption, if target has an id, so does its uplink */
871 if(has_id(client_p
) && has_id(target_p
))
872 sendto_one(client_p
, ":%s SID %s %d %s :%s%s",
873 target_p
->servptr
->id
, target_p
->name
,
874 target_p
->hopcount
+ 1, target_p
->id
,
875 IsHidden(target_p
) ? "(H) " : "", target_p
->info
);
877 sendto_one(client_p
, ":%s SERVER %s %d :%s%s",
878 target_p
->servptr
->name
,
879 target_p
->name
, target_p
->hopcount
+ 1,
880 IsHidden(target_p
) ? "(H) " : "", target_p
->info
);
882 if(IsCapable(client_p
, CAP_ENCAP
) &&
883 !EmptyString(target_p
->serv
->fullcaps
))
884 sendto_one(client_p
, ":%s ENCAP * GCAP :%s",
885 get_id(target_p
, client_p
),
886 target_p
->serv
->fullcaps
);
891 /* Always send a PING after connect burst is done */
892 sendto_one(client_p
, "PING :%s", get_id(&me
, client_p
));
894 free_pre_client(client_p
);
896 if (!IsCapable(client_p
, CAP_ZIP
))
897 send_pop_queue(client_p
);
903 * New server connection code
904 * Based upon the stuff floating about in s_bsd.c
909 serv_connect_resolved(struct Client
*client_p
)
911 struct rb_sockaddr_storage myipnum
;
912 char vhoststr
[HOSTIPLEN
];
913 struct server_conf
*server_p
;
916 if((server_p
= client_p
->localClient
->att_sconf
) == NULL
)
918 sendto_realops_snomask(SNO_GENERAL
, is_remote_connect(client_p
) ? L_NETWIDE
: L_ALL
, "Lost connect{} block for %s",
920 exit_client(client_p
, client_p
, &me
, "Lost connect{} block");
925 if(client_p
->localClient
->ip
.ss_family
== AF_INET6
)
926 port
= ntohs(((struct sockaddr_in6
*)&client_p
->localClient
->ip
)->sin6_port
);
929 port
= ntohs(((struct sockaddr_in
*)&client_p
->localClient
->ip
)->sin_port
);
931 if(ServerConfVhosted(server_p
))
933 memcpy(&myipnum
, &server_p
->my_ipnum
, sizeof(myipnum
));
934 ((struct sockaddr_in
*)&myipnum
)->sin_port
= 0;
935 myipnum
.ss_family
= server_p
->aftype
;
938 else if(server_p
->aftype
== AF_INET
&& ServerInfo
.specific_ipv4_vhost
)
940 memcpy(&myipnum
, &ServerInfo
.ip
, sizeof(myipnum
));
941 ((struct sockaddr_in
*)&myipnum
)->sin_port
= 0;
942 myipnum
.ss_family
= AF_INET
;
943 SET_SS_LEN(&myipnum
, sizeof(struct sockaddr_in
));
947 else if((server_p
->aftype
== AF_INET6
) && ServerInfo
.specific_ipv6_vhost
)
949 memcpy(&myipnum
, &ServerInfo
.ip6
, sizeof(myipnum
));
950 ((struct sockaddr_in6
*)&myipnum
)->sin6_port
= 0;
951 myipnum
.ss_family
= AF_INET6
;
952 SET_SS_LEN(&myipnum
, sizeof(struct sockaddr_in6
));
958 ilog(L_SERVER
, "Connecting to %s[%s] port %d (%s)", client_p
->name
, client_p
->sockhost
, port
,
960 server_p
->aftype
== AF_INET6
? "IPv6" :
962 (server_p
->aftype
== AF_INET
? "IPv4" : "?"));
964 if(ServerConfSSL(server_p
))
966 rb_connect_tcp(client_p
->localClient
->F
, (struct sockaddr
*)&client_p
->localClient
->ip
,
967 NULL
, 0, serv_connect_ssl_callback
,
968 client_p
, ConfigFileEntry
.connect_timeout
);
971 rb_connect_tcp(client_p
->localClient
->F
, (struct sockaddr
*)&client_p
->localClient
->ip
,
972 NULL
, 0, serv_connect_callback
,
973 client_p
, ConfigFileEntry
.connect_timeout
);
978 rb_inet_ntop_sock((struct sockaddr
*)&myipnum
, vhoststr
, sizeof vhoststr
);
979 ilog(L_SERVER
, "Connecting to %s[%s] port %d (%s) (vhost %s)", client_p
->name
, client_p
->sockhost
, port
,
981 server_p
->aftype
== AF_INET6
? "IPv6" :
983 (server_p
->aftype
== AF_INET
? "IPv4" : "?"), vhoststr
);
986 if(ServerConfSSL(server_p
))
987 rb_connect_tcp(client_p
->localClient
->F
, (struct sockaddr
*)&client_p
->localClient
->ip
,
988 (struct sockaddr
*) &myipnum
,
989 GET_SS_LEN(&myipnum
), serv_connect_ssl_callback
, client_p
,
990 ConfigFileEntry
.connect_timeout
);
992 rb_connect_tcp(client_p
->localClient
->F
, (struct sockaddr
*)&client_p
->localClient
->ip
,
993 (struct sockaddr
*) &myipnum
,
994 GET_SS_LEN(&myipnum
), serv_connect_callback
, client_p
,
995 ConfigFileEntry
.connect_timeout
);
1001 serv_connect_dns_callback(void *vptr
, struct DNSReply
*reply
)
1003 struct Client
*client_p
= vptr
;
1006 rb_free(client_p
->localClient
->dnsquery
);
1007 client_p
->localClient
->dnsquery
= NULL
;
1011 sendto_realops_snomask(SNO_GENERAL
, is_remote_connect(client_p
) ? L_NETWIDE
: L_ALL
, "Cannot resolve hostname for %s",
1013 ilog(L_SERVER
, "Cannot resolve hostname for %s",
1014 log_client_name(client_p
, HIDE_IP
));
1015 exit_client(client_p
, client_p
, &me
, "Cannot resolve hostname");
1019 if(reply
->addr
.ss_family
== AF_INET6
)
1020 port
= ((struct sockaddr_in6
*)&client_p
->localClient
->ip
)->sin6_port
;
1023 port
= ((struct sockaddr_in
*)&client_p
->localClient
->ip
)->sin_port
;
1024 memcpy(&client_p
->localClient
->ip
, &reply
->addr
, sizeof(client_p
->localClient
->ip
));
1026 if(reply
->addr
.ss_family
== AF_INET6
)
1027 ((struct sockaddr_in6
*)&client_p
->localClient
->ip
)->sin6_port
= port
;
1030 ((struct sockaddr_in
*)&client_p
->localClient
->ip
)->sin_port
= port
;
1031 /* Set sockhost properly now -- jilles */
1032 rb_inet_ntop_sock((struct sockaddr
*)&client_p
->localClient
->ip
,
1033 client_p
->sockhost
, sizeof client_p
->sockhost
);
1034 serv_connect_resolved(client_p
);
1038 * serv_connect() - initiate a server connection
1040 * inputs - pointer to conf
1041 * - pointer to client doing the connet
1045 * This code initiates a connection to a server. It first checks to make
1046 * sure the given server exists. If this is the case, it creates a socket,
1047 * creates a client, saves the socket information in the client, and
1048 * initiates a connection to the server through rb_connect_tcp(). The
1049 * completion of this goes through serv_completed_connection().
1051 * We return 1 if the connection is attempted, since we don't know whether
1052 * it suceeded or not, and 0 if it fails in here somewhere.
1055 serv_connect(struct server_conf
*server_p
, struct Client
*by
)
1057 struct Client
*client_p
;
1058 struct rb_sockaddr_storage theiripnum
;
1060 char note
[HOSTLEN
+ 10];
1062 s_assert(server_p
!= NULL
);
1063 if(server_p
== NULL
)
1067 * Make sure this server isn't already connected
1069 if((client_p
= find_server(NULL
, server_p
->name
)))
1071 sendto_realops_snomask(SNO_GENERAL
, L_ALL
,
1072 "Server %s already present from %s",
1073 server_p
->name
, client_p
->name
);
1074 if(by
&& IsPerson(by
) && !MyClient(by
))
1075 sendto_one_notice(by
, ":Server %s already present from %s",
1076 server_p
->name
, client_p
->name
);
1080 /* create a socket for the server connection */
1081 if((F
= rb_socket(server_p
->aftype
, SOCK_STREAM
, 0, NULL
)) == NULL
)
1083 ilog_error("opening a stream socket");
1087 rb_snprintf(note
, sizeof note
, "Server: %s", server_p
->name
);
1090 /* Create a local client */
1091 client_p
= make_client(NULL
);
1093 /* Copy in the server, hostname, fd
1094 * The sockhost may be a hostname, this will be corrected later
1097 rb_strlcpy(client_p
->name
, server_p
->name
, sizeof(client_p
->name
));
1098 rb_strlcpy(client_p
->host
, server_p
->host
, sizeof(client_p
->host
));
1099 rb_strlcpy(client_p
->sockhost
, server_p
->host
, sizeof(client_p
->sockhost
));
1100 client_p
->localClient
->F
= F
;
1101 add_to_cli_fd_hash(client_p
);
1104 * Set up the initial server evilness, ripped straight from
1105 * connect_server(), so don't blame me for it being evil.
1109 if(!rb_set_buffers(client_p
->localClient
->F
, READBUF_SIZE
))
1111 ilog_error("setting the buffer size for a server connection");
1115 * Attach config entries to client here rather than in
1116 * serv_connect_callback(). This to avoid null pointer references.
1118 attach_server_conf(client_p
, server_p
);
1121 * at this point we have a connection in progress and C/N lines
1122 * attached to the client, the socket info should be saved in the
1123 * client and it should either be resolved or have a valid address.
1125 * The socket has been connected or connect is in progress.
1127 make_server(client_p
);
1128 if(by
&& IsPerson(by
))
1130 strcpy(client_p
->serv
->by
, by
->name
);
1131 if(client_p
->serv
->user
)
1132 free_user(client_p
->serv
->user
, NULL
);
1133 client_p
->serv
->user
= by
->user
;
1138 strcpy(client_p
->serv
->by
, "AutoConn.");
1139 if(client_p
->serv
->user
)
1140 free_user(client_p
->serv
->user
, NULL
);
1141 client_p
->serv
->user
= NULL
;
1143 SetConnecting(client_p
);
1144 rb_dlinkAddTail(client_p
, &client_p
->node
, &global_client_list
);
1146 if (rb_inet_pton_sock(server_p
->host
, (struct sockaddr
*)&theiripnum
) > 0)
1148 memcpy(&client_p
->localClient
->ip
, &theiripnum
, sizeof(client_p
->localClient
->ip
));
1150 if(theiripnum
.ss_family
== AF_INET6
)
1151 ((struct sockaddr_in6
*)&client_p
->localClient
->ip
)->sin6_port
= htons(server_p
->port
);
1154 ((struct sockaddr_in
*)&client_p
->localClient
->ip
)->sin_port
= htons(server_p
->port
);
1156 return serv_connect_resolved(client_p
);
1161 if(theiripnum
.ss_family
== AF_INET6
)
1162 ((struct sockaddr_in6
*)&client_p
->localClient
->ip
)->sin6_port
= htons(server_p
->port
);
1165 ((struct sockaddr_in
*)&client_p
->localClient
->ip
)->sin_port
= htons(server_p
->port
);
1167 client_p
->localClient
->dnsquery
= rb_malloc(sizeof(struct DNSQuery
));
1168 client_p
->localClient
->dnsquery
->ptr
= client_p
;
1169 client_p
->localClient
->dnsquery
->callback
= serv_connect_dns_callback
;
1170 gethost_byname_type(server_p
->host
, client_p
->localClient
->dnsquery
,
1172 server_p
->aftype
== AF_INET6
? T_AAAA
:
1180 serv_connect_ssl_callback(rb_fde_t
*F
, int status
, void *data
)
1182 struct Client
*client_p
= data
;
1184 rb_connect_sockaddr(F
, (struct sockaddr
*)&client_p
->localClient
->ip
, sizeof(client_p
->localClient
->ip
));
1187 /* Print error message, just like non-SSL. */
1188 serv_connect_callback(F
, status
, data
);
1191 rb_socketpair(AF_UNIX
, SOCK_STREAM
, 0, &xF
[0], &xF
[1], "Outgoing ssld connection");
1192 del_from_cli_fd_hash(client_p
);
1193 client_p
->localClient
->F
= xF
[0];
1194 add_to_cli_fd_hash(client_p
);
1196 client_p
->localClient
->ssl_ctl
= start_ssld_connect(F
, xF
[1], rb_get_fd(xF
[0]));
1198 serv_connect_callback(client_p
->localClient
->F
, RB_OK
, client_p
);
1202 * serv_connect_callback() - complete a server connection.
1204 * This routine is called after the server connection attempt has
1205 * completed. If unsucessful, an error is sent to ops and the client
1206 * is closed. If sucessful, it goes through the initialisation/check
1207 * procedures, the capabilities are sent, and the socket is then
1208 * marked for reading.
1211 serv_connect_callback(rb_fde_t
*F
, int status
, void *data
)
1213 struct Client
*client_p
= data
;
1214 struct server_conf
*server_p
;
1217 /* First, make sure its a real client! */
1218 s_assert(client_p
!= NULL
);
1219 s_assert(client_p
->localClient
->F
== F
);
1221 if(client_p
== NULL
)
1224 /* while we were waiting for the callback, its possible this already
1227 if(find_server(NULL
, client_p
->name
) != NULL
)
1229 exit_client(client_p
, client_p
, &me
, "Server Exists");
1233 if(client_p
->localClient
->ssl_ctl
== NULL
)
1234 rb_connect_sockaddr(F
, (struct sockaddr
*)&client_p
->localClient
->ip
, sizeof(client_p
->localClient
->ip
));
1236 /* Check the status */
1239 /* COMM_ERR_TIMEOUT wont have an errno associated with it,
1240 * the others will.. --fl
1242 if(status
== RB_ERR_TIMEOUT
)
1244 sendto_realops_snomask(SNO_GENERAL
, is_remote_connect(client_p
) ? L_NETWIDE
: L_ALL
,
1245 "Error connecting to %s[%s]: %s",
1249 ilog(L_SERVER
, "Error connecting to %s[%s]: %s",
1250 client_p
->name
, client_p
->sockhost
,
1255 errstr
= strerror(rb_get_sockerr(F
));
1256 sendto_realops_snomask(SNO_GENERAL
, is_remote_connect(client_p
) ? L_NETWIDE
: L_ALL
,
1257 "Error connecting to %s[%s]: %s (%s)",
1260 rb_errstr(status
), errstr
);
1261 ilog(L_SERVER
, "Error connecting to %s[%s]: %s (%s)",
1262 client_p
->name
, client_p
->sockhost
,
1263 rb_errstr(status
), errstr
);
1266 exit_client(client_p
, client_p
, &me
, rb_errstr(status
));
1270 /* COMM_OK, so continue the connection procedure */
1271 /* Get the C/N lines */
1272 if((server_p
= client_p
->localClient
->att_sconf
) == NULL
)
1274 sendto_realops_snomask(SNO_GENERAL
, is_remote_connect(client_p
) ? L_NETWIDE
: L_ALL
, "Lost connect{} block for %s",
1276 exit_client(client_p
, client_p
, &me
, "Lost connect{} block");
1280 /* Next, send the initial handshake */
1281 SetHandshake(client_p
);
1283 /* kludge, if we're not using TS6, dont ever send
1284 * ourselves as being TS6 capable.
1286 if(!EmptyString(server_p
->spasswd
))
1288 sendto_one(client_p
, "PASS %s TS %d :%s",
1289 server_p
->spasswd
, TS_CURRENT
, me
.id
);
1292 /* pass my info to the new server */
1293 send_capabilities(client_p
, default_server_capabs
1294 | (ServerConfCompressed(server_p
) ? CAP_ZIP_SUPPORTED
: 0)
1295 | (ServerConfTb(server_p
) ? CAP_TB
: 0));
1297 sendto_one(client_p
, "SERVER %s 1 :%s%s",
1299 ConfigServerHide
.hidden
? "(H) " : "", me
.info
);
1302 * If we've been marked dead because a send failed, just exit
1303 * here now and save everyone the trouble of us ever existing.
1305 if(IsAnyDead(client_p
))
1307 sendto_realops_snomask(SNO_GENERAL
, is_remote_connect(client_p
) ? L_NETWIDE
: L_ALL
,
1308 "%s went dead during handshake", client_p
->name
);
1309 exit_client(client_p
, client_p
, &me
, "Went dead during handshake");
1313 /* don't move to serv_list yet -- we haven't sent a burst! */
1315 /* If we get here, we're ok, so lets start reading some data */
1316 read_packet(F
, client_p
);
1319 #ifndef HAVE_SOCKETPAIR
1321 inet_socketpair(int d
, int type
, int protocol
, int sv
[2])
1323 struct sockaddr_in addr1
, addr2
, addr3
;
1324 int addr3_len
= sizeof(addr3
);
1326 int port_no
= 20000;
1328 if(d
!= AF_INET
|| type
!= SOCK_STREAM
|| protocol
)
1330 errno
= EAFNOSUPPORT
;
1333 if(((sv
[0] = socket(AF_INET
, SOCK_STREAM
, 0)) < 0) || ((sv
[1] = socket(AF_INET
, SOCK_STREAM
, 0)) < 0))
1336 addr1
.sin_port
= htons(port_no
);
1337 addr1
.sin_family
= AF_INET
;
1338 addr1
.sin_addr
.s_addr
= htonl(INADDR_LOOPBACK
);
1339 while ((rc
= bind (sv
[0], (struct sockaddr
*) &addr1
, sizeof (addr1
))) < 0 && errno
== EADDRINUSE
)
1340 addr1
.sin_port
= htons(++port_no
);
1345 if(listen(sv
[0], 1) < 0)
1352 addr2
.sin_port
= htons(port_no
);
1353 addr2
.sin_family
= AF_INET
;
1354 addr2
.sin_addr
.s_addr
= htonl(INADDR_LOOPBACK
);
1355 if(connect (sv
[1], (struct sockaddr
*) &addr2
, sizeof (addr2
)) < 0)
1362 if((fd
= accept(sv
[1], (struct sockaddr
*) &addr3
, &addr3_len
)) < 0)