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... */
61 #define INADDR_NONE ((unsigned int) 0xffffffff)
64 #ifndef HAVE_SOCKETPAIR
65 static int inet_socketpair(int d
, int type
, int protocol
, int sv
[2]);
68 int MaxConnectionCount
= 1;
69 int MaxClientCount
= 1;
70 int refresh_user_links
= 0;
72 static char buf
[BUFSIZE
];
75 * list of recognized server capabilities. "TS" is not on the list
76 * because all servers that we talk to already do TS, and the kludged
77 * extra argument to "PASS" takes care of checking that. -orabidoo
79 struct Capability captab
[] = {
86 { "KNOCK", CAP_KNOCK
},
89 { "UNKLN", CAP_UNKLN
},
90 { "CLUSTER", CAP_CLUSTER
},
91 { "ENCAP", CAP_ENCAP
},
92 { "SERVICES", CAP_SERVICE
},
93 { "RSFNC", CAP_RSFNC
},
99 static CNCB serv_connect_callback
;
100 static CNCB serv_connect_ssl_callback
;
103 * hunt_server - Do the basic thing in delivering the message (command)
104 * across the relays to the specific server (server) for
107 * Note: The command is a format string and *MUST* be
108 * of prefixed style (e.g. ":%s COMMAND %s ...").
109 * Command can have only max 8 parameters.
111 * server parv[server] is the parameter identifying the
115 * parv[server] is replaced with the pointer to the
116 * real servername from the matched client (I'm lazy
119 * returns: (see #defines)
122 hunt_server(struct Client
*client_p
, struct Client
*source_p
,
123 const char *command
, int server
, int parc
, const char *parv
[])
125 struct Client
*target_p
;
132 * Assume it's me, if no server
134 if(parc
<= server
|| EmptyString(parv
[server
]) ||
135 match(parv
[server
], me
.name
) || (strcmp(parv
[server
], me
.id
) == 0))
136 return (HUNTED_ISME
);
138 new = LOCAL_COPY(parv
[server
]);
141 * These are to pickup matches that would cause the following
142 * message to go in the wrong direction while doing quick fast
143 * non-matching lookups.
145 if(MyClient(source_p
))
146 target_p
= find_named_client(new);
148 target_p
= find_client(new);
151 if(target_p
->from
== source_p
->from
&& !MyConnect(target_p
))
155 wilds
= (strchr(new, '?') || strchr(new, '*'));
158 * Again, if there are no wild cards involved in the server
159 * name, use the hash lookup
165 if(MyClient(source_p
) || !IsDigit(parv
[server
][0]))
166 sendto_one_numeric(source_p
, ERR_NOSUCHSERVER
,
167 form_str(ERR_NOSUCHSERVER
),
169 return (HUNTED_NOSUCH
);
175 RB_DLINK_FOREACH(ptr
, global_client_list
.head
)
177 if(match(new, ((struct Client
*) (ptr
->data
))->name
))
179 target_p
= ptr
->data
;
188 if(!IsRegistered(target_p
))
190 sendto_one_numeric(source_p
, ERR_NOSUCHSERVER
,
191 form_str(ERR_NOSUCHSERVER
),
193 return HUNTED_NOSUCH
;
196 if(IsMe(target_p
) || MyClient(target_p
))
200 parv
[server
] = get_id(target_p
, target_p
);
202 sendto_one(target_p
, command
, get_id(source_p
, target_p
),
203 parv
[1], parv
[2], parv
[3], parv
[4], parv
[5], parv
[6], parv
[7], parv
[8]);
205 return (HUNTED_PASS
);
208 if(MyClient(source_p
) || !IsDigit(parv
[server
][0]))
209 sendto_one_numeric(source_p
, ERR_NOSUCHSERVER
,
210 form_str(ERR_NOSUCHSERVER
), parv
[server
]);
211 return (HUNTED_NOSUCH
);
215 * try_connections - scan through configuration and try new connections.
216 * Returns the calendar time when the next call to this
217 * function should be made latest. (No harm done if this
218 * is called earlier or later...)
221 try_connections(void *unused
)
223 struct Client
*client_p
;
224 struct server_conf
*server_p
= NULL
;
225 struct server_conf
*tmp_p
;
228 int connecting
= FALSE
;
232 RB_DLINK_FOREACH(ptr
, server_conf_list
.head
)
236 if(ServerConfIllegal(tmp_p
) || !ServerConfAutoconn(tmp_p
))
239 /* don't allow ssl connections if ssl isn't setup */
240 if(ServerConfSSL(tmp_p
) && (!ssl_ok
|| !get_ssld_count()))
243 cltmp
= tmp_p
->class;
246 * Skip this entry if the use of it is still on hold until
247 * future. Otherwise handle this entry (and set it on hold
248 * until next time). Will reset only hold times, if already
249 * made one successfull connection... [this algorithm is
250 * a bit fuzzy... -- msa >;) ]
252 if(tmp_p
->hold
> rb_current_time())
254 if(next
> tmp_p
->hold
|| next
== 0)
259 confrq
= get_con_freq(cltmp
);
260 tmp_p
->hold
= rb_current_time() + confrq
;
263 * Found a CONNECT config with port specified, scan clients
264 * and see if this server is already connected?
266 client_p
= find_server(NULL
, tmp_p
->name
);
268 if(!client_p
&& (CurrUsers(cltmp
) < MaxUsers(cltmp
)) && !connecting
)
272 /* We connect only one at time... */
276 if((next
> tmp_p
->hold
) || (next
== 0))
280 /* TODO: change this to set active flag to 0 when added to event! --Habeeb */
281 if(GlobalSetOptions
.autoconn
== 0)
287 /* move this connect entry to end.. */
288 rb_dlinkDelete(&server_p
->node
, &server_conf_list
);
289 rb_dlinkAddTail(server_p
, &server_p
->node
, &server_conf_list
);
292 * We used to only print this if serv_connect() actually
293 * suceeded, but since rb_tcp_connect() can call the callback
294 * immediately if there is an error, we were getting error messages
295 * in the wrong order. SO, we just print out the activated line,
296 * and let serv_connect() / serv_connect_callback() print an
297 * error afterwards if it fails.
300 sendto_realops_snomask(SNO_GENERAL
, L_ALL
,
301 "Connection to %s activated",
304 serv_connect(server_p
, 0);
308 check_server(const char *name
, struct Client
*client_p
)
310 struct server_conf
*server_p
= NULL
;
311 struct server_conf
*tmp_p
;
315 s_assert(NULL
!= client_p
);
319 if(!(client_p
->localClient
->passwd
))
322 if(strlen(name
) > HOSTLEN
)
325 RB_DLINK_FOREACH(ptr
, server_conf_list
.head
)
329 if(ServerConfIllegal(tmp_p
))
332 if(!match(tmp_p
->name
, name
))
337 /* XXX: Fix me for IPv6 */
338 /* XXX sockhost is the IPv4 ip as a string */
339 if(match(tmp_p
->host
, client_p
->host
) ||
340 match(tmp_p
->host
, client_p
->sockhost
))
344 if(ServerConfEncrypted(tmp_p
))
346 if(!strcmp(tmp_p
->passwd
, crypt(client_p
->localClient
->passwd
,
353 else if(!strcmp(tmp_p
->passwd
, client_p
->localClient
->passwd
))
364 if(ServerConfSSL(server_p
) && client_p
->localClient
->ssl_ctl
== NULL
)
369 attach_server_conf(client_p
, server_p
);
371 /* clear ZIP/TB if they support but we dont want them */
373 if(!ServerConfCompressed(server_p
))
375 ClearCap(client_p
, CAP_ZIP
);
377 if(!ServerConfTb(server_p
))
378 ClearCap(client_p
, CAP_TB
);
386 * inputs - Client pointer to send to
387 * - int flag of capabilities that this server has
389 * side effects - send the CAPAB line to a server -orabidoo
393 send_capabilities(struct Client
*client_p
, int cap_can_send
)
395 struct Capability
*cap
;
396 char msgbuf
[BUFSIZE
];
402 for (cap
= captab
; cap
->name
; ++cap
)
404 if(cap
->cap
& cap_can_send
)
406 tl
= rb_sprintf(t
, "%s ", cap
->name
);
414 sendto_one(client_p
, "CAPAB :%s", msgbuf
);
419 * input - client to burst to, channel name, list to burst, mode flag
421 * side effects - client is sent a list of +b, +e, or +I modes
424 burst_modes_TS6(struct Client
*client_p
, struct Channel
*chptr
,
425 rb_dlink_list
*list
, char flag
)
434 cur_len
= mlen
= rb_sprintf(buf
, ":%s BMASK %ld %s %c :",
435 me
.id
, (long) chptr
->channelts
, chptr
->chname
, flag
);
438 RB_DLINK_FOREACH(ptr
, list
->head
)
442 tlen
= strlen(banptr
->banstr
) + 1;
445 if(cur_len
+ tlen
> BUFSIZE
- 3)
447 /* the one we're trying to send doesnt fit at all! */
454 /* chop off trailing space and send.. */
456 sendto_one(client_p
, "%s", buf
);
461 rb_sprintf(t
, "%s ", banptr
->banstr
);
466 /* cant ever exit the loop above without having modified buf,
467 * chop off trailing space and send.
470 sendto_one(client_p
, "%s", buf
);
476 * inputs - client (server) to send nick towards
477 * - client to send nick for
479 * side effects - NICK message is sent towards given client_p
482 burst_TS6(struct Client
*client_p
)
484 static char ubuf
[12];
485 struct Client
*target_p
;
486 struct Channel
*chptr
;
487 struct membership
*msptr
;
488 hook_data_client hclientinfo
;
489 hook_data_channel hchaninfo
;
496 hclientinfo
.client
= hchaninfo
.client
= client_p
;
498 RB_DLINK_FOREACH(ptr
, global_client_list
.head
)
500 target_p
= ptr
->data
;
502 if(!IsPerson(target_p
))
505 send_umode(NULL
, target_p
, 0, 0, ubuf
);
512 if(has_id(target_p
) && IsCapable(client_p
, CAP_EUID
))
513 sendto_one(client_p
, ":%s EUID %s %d %ld %s %s %s %s %s %s %s :%s",
514 target_p
->servptr
->id
, target_p
->name
,
515 target_p
->hopcount
+ 1,
516 (long) target_p
->tsinfo
, ubuf
,
517 target_p
->username
, target_p
->host
,
518 IsIPSpoof(target_p
) ? "0" : target_p
->sockhost
,
520 IsDynSpoof(target_p
) ? target_p
->orighost
: "*",
521 EmptyString(target_p
->user
->suser
) ? "*" : target_p
->user
->suser
,
523 else if(has_id(target_p
))
524 sendto_one(client_p
, ":%s UID %s %d %ld %s %s %s %s %s :%s",
525 target_p
->servptr
->id
, target_p
->name
,
526 target_p
->hopcount
+ 1,
527 (long) target_p
->tsinfo
, ubuf
,
528 target_p
->username
, target_p
->host
,
529 IsIPSpoof(target_p
) ? "0" : target_p
->sockhost
,
530 target_p
->id
, target_p
->info
);
532 sendto_one(client_p
, "NICK %s %d %ld %s %s %s %s :%s",
534 target_p
->hopcount
+ 1,
535 (long) target_p
->tsinfo
,
537 target_p
->username
, target_p
->host
,
538 target_p
->servptr
->name
, target_p
->info
);
540 if(!has_id(target_p
) || !IsCapable(client_p
, CAP_EUID
))
542 if(IsDynSpoof(target_p
))
543 sendto_one(client_p
, ":%s ENCAP * REALHOST %s",
544 use_id(target_p
), target_p
->orighost
);
545 if(!EmptyString(target_p
->user
->suser
))
546 sendto_one(client_p
, ":%s ENCAP * LOGIN %s",
547 use_id(target_p
), target_p
->user
->suser
);
550 if(ConfigFileEntry
.burst_away
&& !EmptyString(target_p
->user
->away
))
551 sendto_one(client_p
, ":%s AWAY :%s",
553 target_p
->user
->away
);
555 hclientinfo
.target
= target_p
;
556 call_hook(h_burst_client
, &hclientinfo
);
559 RB_DLINK_FOREACH(ptr
, global_channel_list
.head
)
563 if(*chptr
->chname
!= '#')
566 cur_len
= mlen
= rb_sprintf(buf
, ":%s SJOIN %ld %s %s :", me
.id
,
567 (long) chptr
->channelts
, chptr
->chname
,
568 channel_modes(chptr
, client_p
));
572 RB_DLINK_FOREACH(uptr
, chptr
->members
.head
)
576 tlen
= strlen(use_id(msptr
->client_p
)) + 1;
582 if(cur_len
+ tlen
>= BUFSIZE
- 3)
585 sendto_one(client_p
, "%s", buf
);
590 rb_sprintf(t
, "%s%s ", find_channel_status(msptr
, 1),
591 use_id(msptr
->client_p
));
597 if (rb_dlink_list_length(&chptr
->members
) > 0)
599 /* remove trailing space */
602 sendto_one(client_p
, "%s", buf
);
604 if(rb_dlink_list_length(&chptr
->banlist
) > 0)
605 burst_modes_TS6(client_p
, chptr
, &chptr
->banlist
, 'b');
607 if(IsCapable(client_p
, CAP_EX
) &&
608 rb_dlink_list_length(&chptr
->exceptlist
) > 0)
609 burst_modes_TS6(client_p
, chptr
, &chptr
->exceptlist
, 'e');
611 if(IsCapable(client_p
, CAP_IE
) &&
612 rb_dlink_list_length(&chptr
->invexlist
) > 0)
613 burst_modes_TS6(client_p
, chptr
, &chptr
->invexlist
, 'I');
615 if(rb_dlink_list_length(&chptr
->quietlist
) > 0)
616 burst_modes_TS6(client_p
, chptr
, &chptr
->quietlist
, 'q');
618 if(IsCapable(client_p
, CAP_TB
) && chptr
->topic
!= NULL
)
619 sendto_one(client_p
, ":%s TB %s %ld %s%s:%s",
620 me
.id
, chptr
->chname
, (long) chptr
->topic_time
,
621 ConfigChannel
.burst_topicwho
? chptr
->topic_info
: "",
622 ConfigChannel
.burst_topicwho
? " " : "",
625 hchaninfo
.chptr
= chptr
;
626 call_hook(h_burst_channel
, &hchaninfo
);
629 hclientinfo
.target
= NULL
;
630 call_hook(h_burst_finished
, &hclientinfo
);
634 * show_capabilities - show current server capabilities
636 * inputs - pointer to an struct Client
637 * output - pointer to static string
638 * side effects - build up string representing capabilities of server listed
641 show_capabilities(struct Client
*target_p
)
643 static char msgbuf
[BUFSIZE
];
644 struct Capability
*cap
;
647 rb_strlcpy(msgbuf
, " TS6", sizeof(msgbuf
));
650 rb_strlcat(msgbuf
, " SSL", sizeof(msgbuf
));
652 if(!IsServer(target_p
) || !target_p
->serv
->caps
) /* short circuit if no caps */
655 for (cap
= captab
; cap
->cap
; ++cap
)
657 if(cap
->cap
& target_p
->serv
->caps
)
658 rb_snprintf_append(msgbuf
, sizeof(msgbuf
), " %s", cap
->name
);
667 * inputs - pointer to a struct Client
672 server_estab(struct Client
*client_p
)
674 struct Client
*target_p
;
675 struct server_conf
*server_p
;
676 hook_data_client hdata
;
679 char note
[HOSTLEN
+ 15];
681 s_assert(NULL
!= client_p
);
685 host
= client_p
->name
;
687 if((server_p
= client_p
->localClient
->att_sconf
) == NULL
)
689 /* This shouldn't happen, better tell the ops... -A1kmm */
690 sendto_realops_snomask(SNO_GENERAL
, is_remote_connect(client_p
) ? L_NETWIDE
: L_ALL
,
691 "Warning: Lost connect{} block for server %s!", host
);
692 return exit_client(client_p
, client_p
, client_p
, "Lost connect{} block!");
695 /* We shouldn't have to check this, it should already done before
696 * server_estab is called. -A1kmm
698 if(client_p
->localClient
->passwd
)
700 memset(client_p
->localClient
->passwd
, 0, strlen(client_p
->localClient
->passwd
));
701 rb_free(client_p
->localClient
->passwd
);
702 client_p
->localClient
->passwd
= NULL
;
705 /* Its got identd , since its a server */
708 /* If there is something in the serv_list, it might be this
709 * connecting server..
711 if(!ServerInfo
.hub
&& serv_list
.head
)
713 if(client_p
!= serv_list
.head
->data
|| serv_list
.head
->next
)
715 ServerStats
.is_ref
++;
716 sendto_one(client_p
, "ERROR :I'm a leaf not a hub");
717 return exit_client(client_p
, client_p
, client_p
, "I'm a leaf");
721 if(IsUnknown(client_p
))
724 * jdc -- 1. Use EmptyString(), not [0] index reference.
725 * 2. Check ->spasswd, not ->passwd.
727 if(!EmptyString(server_p
->spasswd
))
729 sendto_one(client_p
, "PASS %s TS %d :%s",
730 server_p
->spasswd
, TS_CURRENT
, me
.id
);
733 /* pass info to new server */
734 send_capabilities(client_p
, default_server_capabs
735 | (ServerConfCompressed(server_p
) ? CAP_ZIP_SUPPORTED
: 0)
736 | (ServerConfTb(server_p
) ? CAP_TB
: 0));
738 sendto_one(client_p
, "SERVER %s 1 :%s%s",
740 ConfigServerHide
.hidden
? "(H) " : "",
741 (me
.info
[0]) ? (me
.info
) : "IRCers United");
744 if(!rb_set_buffers(client_p
->localClient
->F
, READBUF_SIZE
))
745 ilog_error("rb_set_buffers failed for server");
747 /* Enable compression now */
748 if(IsCapable(client_p
, CAP_ZIP
))
750 start_zlib_session(client_p
);
752 sendto_one(client_p
, "SVINFO %d %d 0 :%ld", TS_CURRENT
, TS_MIN
, (long int)rb_current_time());
754 client_p
->servptr
= &me
;
756 if(IsAnyDead(client_p
))
757 return CLIENT_EXITED
;
761 /* Update the capability combination usage counts */
762 set_chcap_usage_counts(client_p
);
764 rb_dlinkAdd(client_p
, &client_p
->lnode
, &me
.serv
->servers
);
765 del_unknown_ip(client_p
);
766 rb_dlinkMoveNode(&client_p
->localClient
->tnode
, &unknown_list
, &serv_list
);
767 rb_dlinkAddTailAlloc(client_p
, &global_serv_list
);
770 add_to_id_hash(client_p
->id
, client_p
);
772 add_to_client_hash(client_p
->name
, client_p
);
773 /* doesnt duplicate client_p->serv if allocated this struct already */
774 make_server(client_p
);
776 client_p
->serv
->caps
= client_p
->localClient
->caps
;
778 if(client_p
->localClient
->fullcaps
)
780 client_p
->serv
->fullcaps
= rb_strdup(client_p
->localClient
->fullcaps
);
781 rb_free(client_p
->localClient
->fullcaps
);
782 client_p
->localClient
->fullcaps
= NULL
;
785 client_p
->serv
->nameinfo
= scache_connect(client_p
->name
, client_p
->info
, IsHidden(client_p
));
786 client_p
->localClient
->firsttime
= rb_current_time();
787 /* fixing eob timings.. -gnp */
789 if((rb_dlink_list_length(&lclient_list
) + rb_dlink_list_length(&serv_list
)) >
790 (unsigned long)MaxConnectionCount
)
791 MaxConnectionCount
= rb_dlink_list_length(&lclient_list
) +
792 rb_dlink_list_length(&serv_list
);
794 /* Show the real host/IP to admins */
795 sendto_realops_snomask(SNO_GENERAL
, L_ALL
,
796 "Link with %s established: (%s) link",
798 show_capabilities(client_p
));
800 ilog(L_SERVER
, "Link with %s established: (%s) link",
801 log_client_name(client_p
, SHOW_IP
), show_capabilities(client_p
));
804 hdata
.target
= client_p
;
805 call_hook(h_server_introduced
, &hdata
);
807 rb_snprintf(note
, sizeof(note
), "Server: %s", client_p
->name
);
808 rb_note(client_p
->localClient
->F
, note
);
811 ** Old sendto_serv_but_one() call removed because we now
812 ** need to send different names to different servers
813 ** (domain name matching) Send new server to other servers.
815 RB_DLINK_FOREACH(ptr
, serv_list
.head
)
817 target_p
= ptr
->data
;
819 if(target_p
== client_p
)
822 if(has_id(target_p
) && has_id(client_p
))
824 sendto_one(target_p
, ":%s SID %s 2 %s :%s%s",
825 me
.id
, client_p
->name
, client_p
->id
,
826 IsHidden(client_p
) ? "(H) " : "", client_p
->info
);
828 if(IsCapable(target_p
, CAP_ENCAP
) &&
829 !EmptyString(client_p
->serv
->fullcaps
))
830 sendto_one(target_p
, ":%s ENCAP * GCAP :%s",
831 client_p
->id
, client_p
->serv
->fullcaps
);
835 sendto_one(target_p
, ":%s SERVER %s 2 :%s%s",
836 me
.name
, client_p
->name
,
837 IsHidden(client_p
) ? "(H) " : "", client_p
->info
);
839 if(IsCapable(target_p
, CAP_ENCAP
) &&
840 !EmptyString(client_p
->serv
->fullcaps
))
841 sendto_one(target_p
, ":%s ENCAP * GCAP :%s",
842 client_p
->name
, client_p
->serv
->fullcaps
);
847 ** Pass on my client information to the new server
849 ** First, pass only servers (idea is that if the link gets
850 ** cancelled beacause the server was already there,
851 ** there are no NICK's to be cancelled...). Of course,
852 ** if cancellation occurs, all this info is sent anyway,
853 ** and I guess the link dies when a read is attempted...? --msa
855 ** Note: Link cancellation to occur at this point means
856 ** that at least two servers from my fragment are building
857 ** up connection this other fragment at the same time, it's
858 ** a race condition, not the normal way of operation...
860 ** ALSO NOTE: using the get_client_name for server names--
861 ** see previous *WARNING*!!! (Also, original inpath
864 RB_DLINK_FOREACH(ptr
, global_serv_list
.head
)
866 target_p
= ptr
->data
;
868 /* target_p->from == target_p for target_p == client_p */
869 if(IsMe(target_p
) || target_p
->from
== client_p
)
872 /* presumption, if target has an id, so does its uplink */
873 if(has_id(client_p
) && has_id(target_p
))
874 sendto_one(client_p
, ":%s SID %s %d %s :%s%s",
875 target_p
->servptr
->id
, target_p
->name
,
876 target_p
->hopcount
+ 1, target_p
->id
,
877 IsHidden(target_p
) ? "(H) " : "", target_p
->info
);
879 sendto_one(client_p
, ":%s SERVER %s %d :%s%s",
880 target_p
->servptr
->name
,
881 target_p
->name
, target_p
->hopcount
+ 1,
882 IsHidden(target_p
) ? "(H) " : "", target_p
->info
);
884 if(IsCapable(client_p
, CAP_ENCAP
) &&
885 !EmptyString(target_p
->serv
->fullcaps
))
886 sendto_one(client_p
, ":%s ENCAP * GCAP :%s",
887 get_id(target_p
, client_p
),
888 target_p
->serv
->fullcaps
);
893 /* Always send a PING after connect burst is done */
894 sendto_one(client_p
, "PING :%s", get_id(&me
, client_p
));
896 free_pre_client(client_p
);
898 if (!IsCapable(client_p
, CAP_ZIP
))
899 send_pop_queue(client_p
);
905 * New server connection code
906 * Based upon the stuff floating about in s_bsd.c
911 serv_connect_resolved(struct Client
*client_p
)
913 struct rb_sockaddr_storage myipnum
;
914 char vhoststr
[HOSTIPLEN
];
915 struct server_conf
*server_p
;
918 if((server_p
= client_p
->localClient
->att_sconf
) == NULL
)
920 sendto_realops_snomask(SNO_GENERAL
, is_remote_connect(client_p
) ? L_NETWIDE
: L_ALL
, "Lost connect{} block for %s",
922 exit_client(client_p
, client_p
, &me
, "Lost connect{} block");
927 if(client_p
->localClient
->ip
.ss_family
== AF_INET6
)
928 port
= ntohs(((struct sockaddr_in6
*)&client_p
->localClient
->ip
)->sin6_port
);
931 port
= ntohs(((struct sockaddr_in
*)&client_p
->localClient
->ip
)->sin_port
);
933 if(ServerConfVhosted(server_p
))
935 memcpy(&myipnum
, &server_p
->my_ipnum
, sizeof(myipnum
));
936 ((struct sockaddr_in
*)&myipnum
)->sin_port
= 0;
937 myipnum
.ss_family
= server_p
->aftype
;
940 else if(server_p
->aftype
== AF_INET
&& ServerInfo
.specific_ipv4_vhost
)
942 memcpy(&myipnum
, &ServerInfo
.ip
, sizeof(myipnum
));
943 ((struct sockaddr_in
*)&myipnum
)->sin_port
= 0;
944 myipnum
.ss_family
= AF_INET
;
945 SET_SS_LEN(&myipnum
, sizeof(struct sockaddr_in
));
949 else if((server_p
->aftype
== AF_INET6
) && ServerInfo
.specific_ipv6_vhost
)
951 memcpy(&myipnum
, &ServerInfo
.ip6
, sizeof(myipnum
));
952 ((struct sockaddr_in6
*)&myipnum
)->sin6_port
= 0;
953 myipnum
.ss_family
= AF_INET6
;
954 SET_SS_LEN(&myipnum
, sizeof(struct sockaddr_in6
));
960 ilog(L_SERVER
, "Connecting to %s[%s] port %d (%s)", client_p
->name
, client_p
->sockhost
, port
,
962 server_p
->aftype
== AF_INET6
? "IPv6" :
964 (server_p
->aftype
== AF_INET
? "IPv4" : "?"));
966 if(ServerConfSSL(server_p
))
968 rb_connect_tcp(client_p
->localClient
->F
, (struct sockaddr
*)&client_p
->localClient
->ip
,
969 NULL
, 0, serv_connect_ssl_callback
,
970 client_p
, ConfigFileEntry
.connect_timeout
);
973 rb_connect_tcp(client_p
->localClient
->F
, (struct sockaddr
*)&client_p
->localClient
->ip
,
974 NULL
, 0, serv_connect_callback
,
975 client_p
, ConfigFileEntry
.connect_timeout
);
980 rb_inet_ntop_sock((struct sockaddr
*)&myipnum
, vhoststr
, sizeof vhoststr
);
981 ilog(L_SERVER
, "Connecting to %s[%s] port %d (%s) (vhost %s)", client_p
->name
, client_p
->sockhost
, port
,
983 server_p
->aftype
== AF_INET6
? "IPv6" :
985 (server_p
->aftype
== AF_INET
? "IPv4" : "?"), vhoststr
);
988 if(ServerConfSSL(server_p
))
989 rb_connect_tcp(client_p
->localClient
->F
, (struct sockaddr
*)&client_p
->localClient
->ip
,
990 (struct sockaddr
*) &myipnum
,
991 GET_SS_LEN(&myipnum
), serv_connect_ssl_callback
, client_p
,
992 ConfigFileEntry
.connect_timeout
);
994 rb_connect_tcp(client_p
->localClient
->F
, (struct sockaddr
*)&client_p
->localClient
->ip
,
995 (struct sockaddr
*) &myipnum
,
996 GET_SS_LEN(&myipnum
), serv_connect_callback
, client_p
,
997 ConfigFileEntry
.connect_timeout
);
1003 serv_connect_dns_callback(void *vptr
, struct DNSReply
*reply
)
1005 struct Client
*client_p
= vptr
;
1008 rb_free(client_p
->localClient
->dnsquery
);
1009 client_p
->localClient
->dnsquery
= NULL
;
1013 sendto_realops_snomask(SNO_GENERAL
, is_remote_connect(client_p
) ? L_NETWIDE
: L_ALL
, "Cannot resolve hostname for %s",
1015 ilog(L_SERVER
, "Cannot resolve hostname for %s",
1016 log_client_name(client_p
, HIDE_IP
));
1017 exit_client(client_p
, client_p
, &me
, "Cannot resolve hostname");
1021 if(reply
->addr
.ss_family
== AF_INET6
)
1022 port
= ((struct sockaddr_in6
*)&client_p
->localClient
->ip
)->sin6_port
;
1025 port
= ((struct sockaddr_in
*)&client_p
->localClient
->ip
)->sin_port
;
1026 memcpy(&client_p
->localClient
->ip
, &reply
->addr
, sizeof(client_p
->localClient
->ip
));
1028 if(reply
->addr
.ss_family
== AF_INET6
)
1029 ((struct sockaddr_in6
*)&client_p
->localClient
->ip
)->sin6_port
= port
;
1032 ((struct sockaddr_in
*)&client_p
->localClient
->ip
)->sin_port
= port
;
1033 /* Set sockhost properly now -- jilles */
1034 rb_inet_ntop_sock((struct sockaddr
*)&client_p
->localClient
->ip
,
1035 client_p
->sockhost
, sizeof client_p
->sockhost
);
1036 serv_connect_resolved(client_p
);
1040 * serv_connect() - initiate a server connection
1042 * inputs - pointer to conf
1043 * - pointer to client doing the connet
1047 * This code initiates a connection to a server. It first checks to make
1048 * sure the given server exists. If this is the case, it creates a socket,
1049 * creates a client, saves the socket information in the client, and
1050 * initiates a connection to the server through rb_connect_tcp(). The
1051 * completion of this goes through serv_completed_connection().
1053 * We return 1 if the connection is attempted, since we don't know whether
1054 * it suceeded or not, and 0 if it fails in here somewhere.
1057 serv_connect(struct server_conf
*server_p
, struct Client
*by
)
1059 struct Client
*client_p
;
1060 struct rb_sockaddr_storage theiripnum
;
1062 char note
[HOSTLEN
+ 10];
1064 s_assert(server_p
!= NULL
);
1065 if(server_p
== NULL
)
1069 * Make sure this server isn't already connected
1071 if((client_p
= find_server(NULL
, server_p
->name
)))
1073 sendto_realops_snomask(SNO_GENERAL
, L_ALL
,
1074 "Server %s already present from %s",
1075 server_p
->name
, client_p
->name
);
1076 if(by
&& IsPerson(by
) && !MyClient(by
))
1077 sendto_one_notice(by
, ":Server %s already present from %s",
1078 server_p
->name
, client_p
->name
);
1082 /* create a socket for the server connection */
1083 if((F
= rb_socket(server_p
->aftype
, SOCK_STREAM
, 0, NULL
)) == NULL
)
1085 ilog_error("opening a stream socket");
1089 rb_snprintf(note
, sizeof note
, "Server: %s", server_p
->name
);
1092 /* Create a local client */
1093 client_p
= make_client(NULL
);
1095 /* Copy in the server, hostname, fd
1096 * The sockhost may be a hostname, this will be corrected later
1099 rb_strlcpy(client_p
->name
, server_p
->name
, sizeof(client_p
->name
));
1100 rb_strlcpy(client_p
->host
, server_p
->host
, sizeof(client_p
->host
));
1101 rb_strlcpy(client_p
->sockhost
, server_p
->host
, sizeof(client_p
->sockhost
));
1102 client_p
->localClient
->F
= F
;
1103 add_to_cli_fd_hash(client_p
);
1106 * Set up the initial server evilness, ripped straight from
1107 * connect_server(), so don't blame me for it being evil.
1111 if(!rb_set_buffers(client_p
->localClient
->F
, READBUF_SIZE
))
1113 ilog_error("setting the buffer size for a server connection");
1117 * Attach config entries to client here rather than in
1118 * serv_connect_callback(). This to avoid null pointer references.
1120 attach_server_conf(client_p
, server_p
);
1123 * at this point we have a connection in progress and C/N lines
1124 * attached to the client, the socket info should be saved in the
1125 * client and it should either be resolved or have a valid address.
1127 * The socket has been connected or connect is in progress.
1129 make_server(client_p
);
1130 if(by
&& IsPerson(by
))
1132 strcpy(client_p
->serv
->by
, by
->name
);
1133 if(client_p
->serv
->user
)
1134 free_user(client_p
->serv
->user
, NULL
);
1135 client_p
->serv
->user
= by
->user
;
1140 strcpy(client_p
->serv
->by
, "AutoConn.");
1141 if(client_p
->serv
->user
)
1142 free_user(client_p
->serv
->user
, NULL
);
1143 client_p
->serv
->user
= NULL
;
1145 SetConnecting(client_p
);
1146 rb_dlinkAddTail(client_p
, &client_p
->node
, &global_client_list
);
1148 if (rb_inet_pton_sock(server_p
->host
, (struct sockaddr
*)&theiripnum
) > 0)
1150 memcpy(&client_p
->localClient
->ip
, &theiripnum
, sizeof(client_p
->localClient
->ip
));
1152 if(theiripnum
.ss_family
== AF_INET6
)
1153 ((struct sockaddr_in6
*)&client_p
->localClient
->ip
)->sin6_port
= htons(server_p
->port
);
1156 ((struct sockaddr_in
*)&client_p
->localClient
->ip
)->sin_port
= htons(server_p
->port
);
1158 return serv_connect_resolved(client_p
);
1163 if(theiripnum
.ss_family
== AF_INET6
)
1164 ((struct sockaddr_in6
*)&client_p
->localClient
->ip
)->sin6_port
= htons(server_p
->port
);
1167 ((struct sockaddr_in
*)&client_p
->localClient
->ip
)->sin_port
= htons(server_p
->port
);
1169 client_p
->localClient
->dnsquery
= rb_malloc(sizeof(struct DNSQuery
));
1170 client_p
->localClient
->dnsquery
->ptr
= client_p
;
1171 client_p
->localClient
->dnsquery
->callback
= serv_connect_dns_callback
;
1172 gethost_byname_type(server_p
->host
, client_p
->localClient
->dnsquery
,
1174 server_p
->aftype
== AF_INET6
? T_AAAA
:
1182 serv_connect_ssl_callback(rb_fde_t
*F
, int status
, void *data
)
1184 struct Client
*client_p
= data
;
1186 rb_connect_sockaddr(F
, (struct sockaddr
*)&client_p
->localClient
->ip
, sizeof(client_p
->localClient
->ip
));
1189 /* Print error message, just like non-SSL. */
1190 serv_connect_callback(F
, status
, data
);
1193 rb_socketpair(AF_UNIX
, SOCK_STREAM
, 0, &xF
[0], &xF
[1], "Outgoing ssld connection");
1194 del_from_cli_fd_hash(client_p
);
1195 client_p
->localClient
->F
= xF
[0];
1196 add_to_cli_fd_hash(client_p
);
1198 client_p
->localClient
->ssl_ctl
= start_ssld_connect(F
, xF
[1], rb_get_fd(xF
[0]));
1200 serv_connect_callback(client_p
->localClient
->F
, RB_OK
, client_p
);
1204 * serv_connect_callback() - complete a server connection.
1206 * This routine is called after the server connection attempt has
1207 * completed. If unsucessful, an error is sent to ops and the client
1208 * is closed. If sucessful, it goes through the initialisation/check
1209 * procedures, the capabilities are sent, and the socket is then
1210 * marked for reading.
1213 serv_connect_callback(rb_fde_t
*F
, int status
, void *data
)
1215 struct Client
*client_p
= data
;
1216 struct server_conf
*server_p
;
1219 /* First, make sure its a real client! */
1220 s_assert(client_p
!= NULL
);
1221 s_assert(client_p
->localClient
->F
== F
);
1223 if(client_p
== NULL
)
1226 /* while we were waiting for the callback, its possible this already
1229 if(find_server(NULL
, client_p
->name
) != NULL
)
1231 exit_client(client_p
, client_p
, &me
, "Server Exists");
1235 if(client_p
->localClient
->ssl_ctl
== NULL
)
1236 rb_connect_sockaddr(F
, (struct sockaddr
*)&client_p
->localClient
->ip
, sizeof(client_p
->localClient
->ip
));
1238 /* Check the status */
1241 /* COMM_ERR_TIMEOUT wont have an errno associated with it,
1242 * the others will.. --fl
1244 if(status
== RB_ERR_TIMEOUT
)
1246 sendto_realops_snomask(SNO_GENERAL
, is_remote_connect(client_p
) ? L_NETWIDE
: L_ALL
,
1247 "Error connecting to %s[%s]: %s",
1251 ilog(L_SERVER
, "Error connecting to %s[%s]: %s",
1252 client_p
->name
, client_p
->sockhost
,
1257 errstr
= strerror(rb_get_sockerr(F
));
1258 sendto_realops_snomask(SNO_GENERAL
, is_remote_connect(client_p
) ? L_NETWIDE
: L_ALL
,
1259 "Error connecting to %s[%s]: %s (%s)",
1262 rb_errstr(status
), errstr
);
1263 ilog(L_SERVER
, "Error connecting to %s[%s]: %s (%s)",
1264 client_p
->name
, client_p
->sockhost
,
1265 rb_errstr(status
), errstr
);
1268 exit_client(client_p
, client_p
, &me
, rb_errstr(status
));
1272 /* COMM_OK, so continue the connection procedure */
1273 /* Get the C/N lines */
1274 if((server_p
= client_p
->localClient
->att_sconf
) == NULL
)
1276 sendto_realops_snomask(SNO_GENERAL
, is_remote_connect(client_p
) ? L_NETWIDE
: L_ALL
, "Lost connect{} block for %s",
1278 exit_client(client_p
, client_p
, &me
, "Lost connect{} block");
1282 /* Next, send the initial handshake */
1283 SetHandshake(client_p
);
1285 /* kludge, if we're not using TS6, dont ever send
1286 * ourselves as being TS6 capable.
1288 if(!EmptyString(server_p
->spasswd
))
1290 sendto_one(client_p
, "PASS %s TS %d :%s",
1291 server_p
->spasswd
, TS_CURRENT
, me
.id
);
1294 /* pass my info to the new server */
1295 send_capabilities(client_p
, default_server_capabs
1296 | (ServerConfCompressed(server_p
) ? CAP_ZIP_SUPPORTED
: 0)
1297 | (ServerConfTb(server_p
) ? CAP_TB
: 0));
1299 sendto_one(client_p
, "SERVER %s 1 :%s%s",
1301 ConfigServerHide
.hidden
? "(H) " : "", me
.info
);
1304 * If we've been marked dead because a send failed, just exit
1305 * here now and save everyone the trouble of us ever existing.
1307 if(IsAnyDead(client_p
))
1309 sendto_realops_snomask(SNO_GENERAL
, is_remote_connect(client_p
) ? L_NETWIDE
: L_ALL
,
1310 "%s went dead during handshake", client_p
->name
);
1311 exit_client(client_p
, client_p
, &me
, "Went dead during handshake");
1315 /* don't move to serv_list yet -- we haven't sent a burst! */
1317 /* If we get here, we're ok, so lets start reading some data */
1318 read_packet(F
, client_p
);
1321 #ifndef HAVE_SOCKETPAIR
1323 inet_socketpair(int d
, int type
, int protocol
, int sv
[2])
1325 struct sockaddr_in addr1
, addr2
, addr3
;
1326 int addr3_len
= sizeof(addr3
);
1328 int port_no
= 20000;
1330 if(d
!= AF_INET
|| type
!= SOCK_STREAM
|| protocol
)
1332 errno
= EAFNOSUPPORT
;
1335 if(((sv
[0] = socket(AF_INET
, SOCK_STREAM
, 0)) < 0) || ((sv
[1] = socket(AF_INET
, SOCK_STREAM
, 0)) < 0))
1338 addr1
.sin_port
= htons(port_no
);
1339 addr1
.sin_family
= AF_INET
;
1340 addr1
.sin_addr
.s_addr
= htonl(INADDR_LOOPBACK
);
1341 while ((rc
= bind (sv
[0], (struct sockaddr
*) &addr1
, sizeof (addr1
))) < 0 && errno
== EADDRINUSE
)
1342 addr1
.sin_port
= htons(++port_no
);
1347 if(listen(sv
[0], 1) < 0)
1354 addr2
.sin_port
= htons(port_no
);
1355 addr2
.sin_family
= AF_INET
;
1356 addr2
.sin_addr
.s_addr
= htonl(INADDR_LOOPBACK
);
1357 if(connect (sv
[1], (struct sockaddr
*) &addr2
, sizeof (addr2
)) < 0)
1364 if((fd
= accept(sv
[1], (struct sockaddr
*) &addr3
, &addr3_len
)) < 0)