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elemental-ircd/src/s_serv.c

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/*
* ircd-ratbox: A slightly useful ircd.
* s_serv.c: Server related functions.
*
* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
* Copyright (C) 1996-2002 Hybrid Development Team
* Copyright (C) 2002-2005 ircd-ratbox development team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
*/
#include "stdinc.h"
#ifdef HAVE_LIBCRYPTO
#include <openssl/rsa.h>
#endif
#include <rb_snprintf.h>
#include "s_serv.h"
#include "class.h"
#include "client.h"
#include "common.h"
#include "hash.h"
#include "match.h"
#include "ircd.h"
#include "ircd_defs.h"
#include "numeric.h"
#include "packet.h"
#include "res.h"
#include "s_conf.h"
#include "s_newconf.h"
#include "logger.h"
#include "s_stats.h"
#include "s_user.h"
#include "scache.h"
#include "send.h"
#include "client.h"
#include "channel.h" /* chcap_usage_counts stuff... */
#include "hook.h"
#include "msg.h"
#include "reject.h"
#include "sslproc.h"
#include "irc_dictionary.h"
#ifndef INADDR_NONE
#define INADDR_NONE ((unsigned int) 0xffffffff)
#endif
int MaxConnectionCount = 1;
int MaxClientCount = 1;
int refresh_user_links = 0;
static char buf[BUFSIZE];
/*
* list of recognized server capabilities. "TS" is not on the list
* because all servers that we talk to already do TS, and the kludged
* extra argument to "PASS" takes care of checking that. -orabidoo
*/
struct Capability captab[] = {
/* name cap */
{ "QS", CAP_QS },
{ "EX", CAP_EX },
{ "CHW", CAP_CHW},
{ "IE", CAP_IE},
{ "KLN", CAP_KLN},
{ "KNOCK", CAP_KNOCK},
{ "ZIP", CAP_ZIP},
{ "TB", CAP_TB},
{ "UNKLN", CAP_UNKLN},
{ "CLUSTER", CAP_CLUSTER},
{ "ENCAP", CAP_ENCAP },
{ "SERVICES", CAP_SERVICE },
{ "RSFNC", CAP_RSFNC },
{ "SAVE", CAP_SAVE },
{ "EUID", CAP_EUID },
{ "EOPMOD", CAP_EOPMOD },
{ "BAN", CAP_BAN },
{ "MLOCK", CAP_MLOCK },
{0, 0}
};
static CNCB serv_connect_callback;
static CNCB serv_connect_ssl_callback;
/*
* hunt_server - Do the basic thing in delivering the message (command)
* across the relays to the specific server (server) for
* actions.
*
* Note: The command is a format string and *MUST* be
* of prefixed style (e.g. ":%s COMMAND %s ...").
* Command can have only max 8 parameters.
*
* server parv[server] is the parameter identifying the
* target server.
*
* *WARNING*
* parv[server] is replaced with the pointer to the
* real servername from the matched client (I'm lazy
* now --msa).
*
* returns: (see #defines)
*/
int
hunt_server(struct Client *client_p, struct Client *source_p,
const char *command, int server, int parc, const char *parv[])
{
struct Client *target_p;
int wilds;
rb_dlink_node *ptr;
const char *old;
char *new;
/*
* Assume it's me, if no server
*/
if(parc <= server || EmptyString(parv[server]) ||
match(parv[server], me.name) || (strcmp(parv[server], me.id) == 0))
return (HUNTED_ISME);
new = LOCAL_COPY(parv[server]);
/*
* These are to pickup matches that would cause the following
* message to go in the wrong direction while doing quick fast
* non-matching lookups.
*/
if(MyClient(source_p))
target_p = find_named_client(new);
else
target_p = find_client(new);
if(target_p)
if(target_p->from == source_p->from && !MyConnect(target_p))
target_p = NULL;
collapse(new);
wilds = (strchr(new, '?') || strchr(new, '*'));
/*
* Again, if there are no wild cards involved in the server
* name, use the hash lookup
*/
if(!target_p && wilds) {
RB_DLINK_FOREACH(ptr, global_serv_list.head) {
if(match(new, ((struct Client *) (ptr->data))->name)) {
target_p = ptr->data;
break;
}
}
}
if(target_p && !IsRegistered(target_p))
target_p = NULL;
if(target_p) {
if(IsMe(target_p) || MyClient(target_p))
return HUNTED_ISME;
old = parv[server];
parv[server] = get_id(target_p, target_p);
sendto_one(target_p, command, get_id(source_p, target_p),
parv[1], parv[2], parv[3], parv[4], parv[5], parv[6], parv[7], parv[8]);
parv[server] = old;
return (HUNTED_PASS);
}
if(MyClient(source_p) || !IsDigit(parv[server][0]))
sendto_one_numeric(source_p, ERR_NOSUCHSERVER,
form_str(ERR_NOSUCHSERVER), parv[server]);
return (HUNTED_NOSUCH);
}
/*
* try_connections - scan through configuration and try new connections.
* Returns the calendar time when the next call to this
* function should be made latest. (No harm done if this
* is called earlier or later...)
*/
void
try_connections(void *unused)
{
struct Client *client_p;
struct server_conf *server_p = NULL;
struct server_conf *tmp_p;
struct Class *cltmp;
rb_dlink_node *ptr;
int connecting = FALSE;
int confrq = 0;
time_t next = 0;
RB_DLINK_FOREACH(ptr, server_conf_list.head) {
tmp_p = ptr->data;
if(ServerConfIllegal(tmp_p) || !ServerConfAutoconn(tmp_p))
continue;
/* don't allow ssl connections if ssl isn't setup */
if(ServerConfSSL(tmp_p) && (!ssl_ok || !get_ssld_count()))
continue;
cltmp = tmp_p->class;
/*
* Skip this entry if the use of it is still on hold until
* future. Otherwise handle this entry (and set it on hold
* until next time). Will reset only hold times, if already
* made one successfull connection... [this algorithm is
* a bit fuzzy... -- msa >;) ]
*/
if(tmp_p->hold > rb_current_time()) {
if(next > tmp_p->hold || next == 0)
next = tmp_p->hold;
continue;
}
confrq = get_con_freq(cltmp);
tmp_p->hold = rb_current_time() + confrq;
/*
* Found a CONNECT config with port specified, scan clients
* and see if this server is already connected?
*/
client_p = find_server(NULL, tmp_p->name);
if(!client_p && (CurrUsers(cltmp) < MaxUsers(cltmp)) && !connecting) {
server_p = tmp_p;
/* We connect only one at time... */
connecting = TRUE;
}
if((next > tmp_p->hold) || (next == 0))
next = tmp_p->hold;
}
/* TODO: change this to set active flag to 0 when added to event! --Habeeb */
if(GlobalSetOptions.autoconn == 0)
return;
if(!connecting)
return;
/* move this connect entry to end.. */
rb_dlinkDelete(&server_p->node, &server_conf_list);
rb_dlinkAddTail(server_p, &server_p->node, &server_conf_list);
/*
* We used to only print this if serv_connect() actually
* suceeded, but since rb_tcp_connect() can call the callback
* immediately if there is an error, we were getting error messages
* in the wrong order. SO, we just print out the activated line,
* and let serv_connect() / serv_connect_callback() print an
* error afterwards if it fails.
* -- adrian
*/
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"Connection to %s activated",
server_p->name);
serv_connect(server_p, 0);
}
int
check_server(const char *name, struct Client *client_p)
{
struct server_conf *server_p = NULL;
struct server_conf *tmp_p;
rb_dlink_node *ptr;
int error = -1;
s_assert(NULL != client_p);
if(client_p == NULL)
return error;
if(!(client_p->localClient->passwd))
return -2;
if(strlen(name) > HOSTLEN)
return -4;
RB_DLINK_FOREACH(ptr, server_conf_list.head) {
tmp_p = ptr->data;
if(ServerConfIllegal(tmp_p))
continue;
if(!match(tmp_p->name, name))
continue;
error = -3;
/* XXX: Fix me for IPv6 */
/* XXX sockhost is the IPv4 ip as a string */
if(match(tmp_p->host, client_p->host) ||
match(tmp_p->host, client_p->sockhost)) {
error = -2;
if(tmp_p->passwd) {
if(ServerConfEncrypted(tmp_p)) {
if(!strcmp(tmp_p->passwd, rb_crypt(client_p->localClient->passwd,
tmp_p->passwd))) {
server_p = tmp_p;
break;
} else
continue;
} else if(strcmp(tmp_p->passwd, client_p->localClient->passwd))
continue;
}
if(tmp_p->certfp) {
if(!client_p->certfp || strcasecmp(tmp_p->certfp, client_p->certfp) != 0)
continue;
}
server_p = tmp_p;
break;
}
}
if(server_p == NULL)
return error;
if(ServerConfSSL(server_p) && client_p->localClient->ssl_ctl == NULL) {
return -5;
}
attach_server_conf(client_p, server_p);
/* clear ZIP/TB if they support but we dont want them */
#ifdef HAVE_LIBZ
if(!ServerConfCompressed(server_p))
#endif
ClearCap(client_p, CAP_ZIP);
if(!ServerConfTb(server_p))
ClearCap(client_p, CAP_TB);
return 0;
}
/*
* send_capabilities
*
* inputs - Client pointer to send to
* - int flag of capabilities that this server has
* output - NONE
* side effects - send the CAPAB line to a server -orabidoo
*
*/
void
send_capabilities(struct Client *client_p, int cap_can_send)
{
struct Capability *cap;
char msgbuf[BUFSIZE];
char *t;
int tl;
t = msgbuf;
for (cap = captab; cap->name; ++cap) {
if(cap->cap & cap_can_send) {
tl = sprintf(t, "%s ", cap->name);
t += tl;
}
}
t--;
*t = '\0';
sendto_one(client_p, "CAPAB :%s", msgbuf);
}
static void
burst_ban(struct Client *client_p)
{
rb_dlink_node *ptr;
struct ConfItem *aconf;
const char *type, *oper;
/* +5 for !,@,{,} and null */
char operbuf[NICKLEN + USERLEN + HOSTLEN + HOSTLEN + 5];
char *p;
size_t melen;
melen = strlen(me.name);
RB_DLINK_FOREACH(ptr, prop_bans.head) {
aconf = ptr->data;
/* Skip expired stuff. */
if(aconf->lifetime < rb_current_time())
continue;
switch(aconf->status & ~CONF_ILLEGAL) {
case CONF_KILL:
type = "K";
break;
case CONF_DLINE:
type = "D";
break;
case CONF_XLINE:
type = "X";
break;
case CONF_RESV_NICK:
type = "R";
break;
case CONF_RESV_CHANNEL:
type = "R";
break;
default:
continue;
}
oper = aconf->info.oper;
if(aconf->flags & CONF_FLAGS_MYOPER) {
/* Our operator{} names may not be meaningful
* to other servers, so rewrite to our server
* name.
*/
rb_strlcpy(operbuf, aconf->info.oper, sizeof buf);
p = strrchr(operbuf, '{');
if (p != NULL &&
operbuf + sizeof operbuf - p > (ptrdiff_t)(melen + 2)) {
memcpy(p + 1, me.name, melen);
p[melen + 1] = '}';
p[melen + 2] = '\0';
oper = operbuf;
}
}
sendto_one(client_p, ":%s BAN %s %s %s %lu %d %d %s :%s%s%s",
me.id,
type,
aconf->user ? aconf->user : "*", aconf->host,
(unsigned long)aconf->created,
(int)(aconf->hold - aconf->created),
(int)(aconf->lifetime - aconf->created),
oper,
aconf->passwd,
aconf->spasswd ? "|" : "",
aconf->spasswd ? aconf->spasswd : "");
}
}
/* burst_modes_TS6()
*
* input - client to burst to, channel name, list to burst, mode flag
* output -
* side effects - client is sent a list of +b, +e, or +I modes
*/
static void
burst_modes_TS6(struct Client *client_p, struct Channel *chptr,
rb_dlink_list *list, char flag)
{
rb_dlink_node *ptr;
struct Ban *banptr;
char *t;
int tlen;
int mlen;
int cur_len;
cur_len = mlen = sprintf(buf, ":%s BMASK %ld %s %c :",
me.id, (long) chptr->channelts, chptr->chname, flag);
t = buf + mlen;
RB_DLINK_FOREACH(ptr, list->head) {
banptr = ptr->data;
tlen = strlen(banptr->banstr) + 1;
/* uh oh */
if(cur_len + tlen > BUFSIZE - 3) {
/* the one we're trying to send doesnt fit at all! */
if(cur_len == mlen) {
s_assert(0);
continue;
}
/* chop off trailing space and send.. */
*(t-1) = '\0';
sendto_one(client_p, "%s", buf);
cur_len = mlen;
t = buf + mlen;
}
sprintf(t, "%s ", banptr->banstr);
t += tlen;
cur_len += tlen;
}
/* cant ever exit the loop above without having modified buf,
* chop off trailing space and send.
*/
*(t-1) = '\0';
sendto_one(client_p, "%s", buf);
}
/*
* burst_TS6
*
* inputs - client (server) to send nick towards
* - client to send nick for
* output - NONE
* side effects - NICK message is sent towards given client_p
*/
static void
burst_TS6(struct Client *client_p)
{
static char ubuf[BUFSIZE];
struct Client *target_p;
struct Channel *chptr;
struct membership *msptr;
hook_data_client hclientinfo;
hook_data_channel hchaninfo;
rb_dlink_node *ptr;
rb_dlink_node *uptr;
char *t;
int tlen, mlen;
int cur_len = 0;
struct Metadata *md;
struct DictionaryIter iter;
hclientinfo.client = hchaninfo.client = client_p;
RB_DLINK_FOREACH(ptr, global_client_list.head) {
target_p = ptr->data;
if(!IsPerson(target_p))
continue;
send_umode(NULL, target_p, 0, 0, ubuf);
if(!*ubuf) {
ubuf[0] = '+';
ubuf[1] = '\0';
}
if(IsCapable(client_p, CAP_EUID))
sendto_one(client_p, ":%s EUID %s %d %ld %s %s %s %s %s %s %s :%s",
target_p->servptr->id, target_p->name,
target_p->hopcount + 1,
(long) target_p->tsinfo, ubuf,
target_p->username, target_p->host,
IsIPSpoof(target_p) ? "0" : target_p->sockhost,
target_p->id,
IsDynSpoof(target_p) ? target_p->orighost : "*",
EmptyString(target_p->user->suser) ? "*" : target_p->user->suser,
target_p->info);
else
sendto_one(client_p, ":%s UID %s %d %ld %s %s %s %s %s :%s",
target_p->servptr->id, target_p->name,
target_p->hopcount + 1,
(long) target_p->tsinfo, ubuf,
target_p->username, target_p->host,
IsIPSpoof(target_p) ? "0" : target_p->sockhost,
target_p->id, target_p->info);
if(!EmptyString(target_p->certfp))
sendto_one(client_p, ":%s ENCAP * CERTFP :%s",
use_id(target_p), target_p->certfp);
if(!IsCapable(client_p, CAP_EUID)) {
if(IsDynSpoof(target_p))
sendto_one(client_p, ":%s ENCAP * REALHOST %s",
use_id(target_p), target_p->orighost);
if(!EmptyString(target_p->user->suser))
sendto_one(client_p, ":%s ENCAP * LOGIN %s",
use_id(target_p), target_p->user->suser);
}
DICTIONARY_FOREACH(md, &iter, target_p->user->metadata) {
sendto_one(client_p, ":%s ENCAP * METADATA SET %s %s :%s",
use_id(&me), use_id(target_p), md->name, md->value);
}
if(ConfigFileEntry.burst_away && !EmptyString(target_p->user->away))
sendto_one(client_p, ":%s AWAY :%s",
use_id(target_p),
target_p->user->away);
hclientinfo.target = target_p;
call_hook(h_burst_client, &hclientinfo);
}
RB_DLINK_FOREACH(ptr, global_channel_list.head) {
chptr = ptr->data;
if(*chptr->chname != '#')
continue;
cur_len = mlen = sprintf(buf, ":%s SJOIN %ld %s %s :", me.id,
(long) chptr->channelts, chptr->chname,
channel_modes(chptr, client_p));
t = buf + mlen;
RB_DLINK_FOREACH(uptr, chptr->members.head) {
msptr = uptr->data;
tlen = strlen(use_id(msptr->client_p)) + 1;
if(is_owner(msptr))
tlen++;
if(is_admin(msptr))
tlen++;
if(is_chanop(msptr))
tlen++;
if(is_halfop(msptr))
tlen++;
if(is_voiced(msptr))
tlen++;
if(cur_len + tlen >= BUFSIZE - 3) {
*(t-1) = '\0';
sendto_one(client_p, "%s", buf);
cur_len = mlen;
t = buf + mlen;
}
sprintf(t, "%s%s ", find_channel_status(msptr, 1),
use_id(msptr->client_p));
cur_len += tlen;
t += tlen;
}
if (rb_dlink_list_length(&chptr->members) > 0) {
/* remove trailing space */
*(t-1) = '\0';
}
sendto_one(client_p, "%s", buf);
DICTIONARY_FOREACH(md, &iter, chptr->metadata) {
/* don't bother bursting +J metadata */
if(!(md->name[0] == 'K'))
sendto_one(client_p, ":%s ENCAP * METADATA SET %s %s :%s",
use_id(&me), chptr->chname, md->name, md->value);
}
if(rb_dlink_list_length(&chptr->banlist) > 0)
burst_modes_TS6(client_p, chptr, &chptr->banlist, 'b');
if(IsCapable(client_p, CAP_EX) &&
rb_dlink_list_length(&chptr->exceptlist) > 0)
burst_modes_TS6(client_p, chptr, &chptr->exceptlist, 'e');
if(IsCapable(client_p, CAP_IE) &&
rb_dlink_list_length(&chptr->invexlist) > 0)
burst_modes_TS6(client_p, chptr, &chptr->invexlist, 'I');
if(rb_dlink_list_length(&chptr->quietlist) > 0)
burst_modes_TS6(client_p, chptr, &chptr->quietlist, 'q');
if(IsCapable(client_p, CAP_TB) && chptr->topic != NULL)
sendto_one(client_p, ":%s TB %s %ld %s%s:%s",
me.id, chptr->chname, (long) chptr->topic_time,
ConfigChannel.burst_topicwho ? chptr->topic_info : "",
ConfigChannel.burst_topicwho ? " " : "",
chptr->topic);
if(IsCapable(client_p, CAP_MLOCK))
sendto_one(client_p, ":%s MLOCK %ld %s :%s",
me.id, (long) chptr->channelts, chptr->chname,
EmptyString(chptr->mode_lock) ? "" : chptr->mode_lock);
hchaninfo.chptr = chptr;
call_hook(h_burst_channel, &hchaninfo);
}
hclientinfo.target = NULL;
call_hook(h_burst_finished, &hclientinfo);
}
/*
* show_capabilities - show current server capabilities
*
* inputs - pointer to an struct Client
* output - pointer to static string
* side effects - build up string representing capabilities of server listed
*/
const char *
show_capabilities(struct Client *target_p)
{
static char msgbuf[BUFSIZE];
struct Capability *cap;
if(has_id(target_p))
rb_strlcpy(msgbuf, " TS6", sizeof(msgbuf));
if(IsSSL(target_p))
rb_strlcat(msgbuf, " SSL", sizeof(msgbuf));
if(!IsServer(target_p) || !target_p->serv->caps) /* short circuit if no caps */
return msgbuf + 1;
for (cap = captab; cap->cap; ++cap) {
if(cap->cap & target_p->serv->caps)
snprintf_append(msgbuf, sizeof(msgbuf), " %s", cap->name);
}
return msgbuf + 1;
}
/*
* server_estab
*
* inputs - pointer to a struct Client
* output -
* side effects -
*/
int
server_estab(struct Client *client_p)
{
struct Client *target_p;
struct server_conf *server_p;
hook_data_client hdata;
char *host;
rb_dlink_node *ptr;
char note[HOSTLEN + 15];
s_assert(NULL != client_p);
if(client_p == NULL)
return -1;
host = client_p->name;
if((server_p = client_p->localClient->att_sconf) == NULL) {
/* This shouldn't happen, better tell the ops... -A1kmm */
sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL,
"Warning: Lost connect{} block for server %s!", host);
return exit_client(client_p, client_p, client_p, "Lost connect{} block!");
}
/* We shouldn't have to check this, it should already done before
* server_estab is called. -A1kmm
*/
if(client_p->localClient->passwd) {
memset(client_p->localClient->passwd, 0, strlen(client_p->localClient->passwd));
rb_free(client_p->localClient->passwd);
client_p->localClient->passwd = NULL;
}
/* Its got identd , since its a server */
SetGotId(client_p);
/* If there is something in the serv_list, it might be this
* connecting server..
*/
if(!ServerInfo.hub && serv_list.head) {
if(client_p != serv_list.head->data || serv_list.head->next) {
ServerStats.is_ref++;
sendto_one(client_p, "ERROR :I'm a leaf not a hub");
return exit_client(client_p, client_p, client_p, "I'm a leaf");
}
}
if(IsUnknown(client_p)) {
/* the server may be linking based on certificate fingerprint now. --nenolod */
sendto_one(client_p, "PASS %s TS %d :%s",
EmptyString(server_p->spasswd) ? "*" : server_p->spasswd, TS_CURRENT, me.id);
/* pass info to new server */
send_capabilities(client_p, default_server_capabs
| (ServerConfCompressed(server_p) ? CAP_ZIP_SUPPORTED : 0)
| (ServerConfTb(server_p) ? CAP_TB : 0));
sendto_one(client_p, "SERVER %s 1 :%s%s",
me.name,
ConfigServerHide.hidden ? "(H) " : "",
(me.info[0]) ? (me.info) : "IRCers United");
}
if(!rb_set_buffers(client_p->localClient->F, READBUF_SIZE))
ilog_error("rb_set_buffers failed for server");
/* Enable compression now */
if(IsCapable(client_p, CAP_ZIP)) {
start_zlib_session(client_p);
}
sendto_one(client_p, "SVINFO %d %d 0 :%ld", TS_CURRENT, TS_MIN, (long int)rb_current_time());
client_p->servptr = &me;
if(IsAnyDead(client_p))
return CLIENT_EXITED;
SetServer(client_p);
/* Update the capability combination usage counts */
set_chcap_usage_counts(client_p);
rb_dlinkAdd(client_p, &client_p->lnode, &me.serv->servers);
rb_dlinkMoveNode(&client_p->localClient->tnode, &unknown_list, &serv_list);
rb_dlinkAddTailAlloc(client_p, &global_serv_list);
if(has_id(client_p))
add_to_id_hash(client_p->id, client_p);
add_to_client_hash(client_p->name, client_p);
/* doesnt duplicate client_p->serv if allocated this struct already */
make_server(client_p);
client_p->serv->caps = client_p->localClient->caps;
if(client_p->localClient->fullcaps) {
client_p->serv->fullcaps = rb_strdup(client_p->localClient->fullcaps);
rb_free(client_p->localClient->fullcaps);
client_p->localClient->fullcaps = NULL;
}
client_p->serv->nameinfo = scache_connect(client_p->name, client_p->info, IsHidden(client_p));
client_p->localClient->firsttime = rb_current_time();
/* fixing eob timings.. -gnp */
if((rb_dlink_list_length(&lclient_list) + rb_dlink_list_length(&serv_list)) >
(unsigned long)MaxConnectionCount)
MaxConnectionCount = rb_dlink_list_length(&lclient_list) +
rb_dlink_list_length(&serv_list);
/* Show the real host/IP to admins */
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"Link with %s established: (%s) link",
client_p->name,
show_capabilities(client_p));
ilog(L_SERVER, "Link with %s established: (%s) link",
log_client_name(client_p, SHOW_IP), show_capabilities(client_p));
hdata.client = &me;
hdata.target = client_p;
call_hook(h_server_introduced, &hdata);
snprintf(note, sizeof(note), "Server: %s", client_p->name);
rb_note(client_p->localClient->F, note);
/*
** Old sendto_serv_but_one() call removed because we now
** need to send different names to different servers
** (domain name matching) Send new server to other servers.
*/
RB_DLINK_FOREACH(ptr, serv_list.head) {
target_p = ptr->data;
if(target_p == client_p)
continue;
if(has_id(target_p) && has_id(client_p)) {
sendto_one(target_p, ":%s SID %s 2 %s :%s%s",
me.id, client_p->name, client_p->id,
IsHidden(client_p) ? "(H) " : "", client_p->info);
if(IsCapable(target_p, CAP_ENCAP) &&
!EmptyString(client_p->serv->fullcaps))
sendto_one(target_p, ":%s ENCAP * GCAP :%s",
client_p->id, client_p->serv->fullcaps);
} else {
sendto_one(target_p, ":%s SERVER %s 2 :%s%s",
me.name, client_p->name,
IsHidden(client_p) ? "(H) " : "", client_p->info);
if(IsCapable(target_p, CAP_ENCAP) &&
!EmptyString(client_p->serv->fullcaps))
sendto_one(target_p, ":%s ENCAP * GCAP :%s",
client_p->name, client_p->serv->fullcaps);
}
}
/*
** Pass on my client information to the new server
**
** First, pass only servers (idea is that if the link gets
** cancelled beacause the server was already there,
** there are no NICK's to be cancelled...). Of course,
** if cancellation occurs, all this info is sent anyway,
** and I guess the link dies when a read is attempted...? --msa
**
** Note: Link cancellation to occur at this point means
** that at least two servers from my fragment are building
** up connection this other fragment at the same time, it's
** a race condition, not the normal way of operation...
**
** ALSO NOTE: using the get_client_name for server names--
** see previous *WARNING*!!! (Also, original inpath
** is destroyed...)
*/
RB_DLINK_FOREACH(ptr, global_serv_list.head) {
target_p = ptr->data;
/* target_p->from == target_p for target_p == client_p */
if(IsMe(target_p) || target_p->from == client_p)
continue;
/* presumption, if target has an id, so does its uplink */
if(has_id(client_p) && has_id(target_p))
sendto_one(client_p, ":%s SID %s %d %s :%s%s",
target_p->servptr->id, target_p->name,
target_p->hopcount + 1, target_p->id,
IsHidden(target_p) ? "(H) " : "", target_p->info);
else
sendto_one(client_p, ":%s SERVER %s %d :%s%s",
target_p->servptr->name,
target_p->name, target_p->hopcount + 1,
IsHidden(target_p) ? "(H) " : "", target_p->info);
if(IsCapable(client_p, CAP_ENCAP) &&
!EmptyString(target_p->serv->fullcaps))
sendto_one(client_p, ":%s ENCAP * GCAP :%s",
get_id(target_p, client_p),
target_p->serv->fullcaps);
}
if(IsCapable(client_p, CAP_BAN))
burst_ban(client_p);
burst_TS6(client_p);
/* Always send a PING after connect burst is done */
sendto_one(client_p, "PING :%s", get_id(&me, client_p));
free_pre_client(client_p);
send_pop_queue(client_p);
return 0;
}
/*
* New server connection code
* Based upon the stuff floating about in s_bsd.c
* -- adrian
*/
static int
serv_connect_resolved(struct Client *client_p)
{
struct rb_sockaddr_storage myipnum;
char vhoststr[HOSTIPLEN];
struct server_conf *server_p;
uint16_t port;
if((server_p = client_p->localClient->att_sconf) == NULL) {
sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL, "Lost connect{} block for %s",
client_p->name);
exit_client(client_p, client_p, &me, "Lost connect{} block");
return 0;
}
#ifdef RB_IPV6
if(client_p->localClient->ip.ss_family == AF_INET6)
port = ntohs(((struct sockaddr_in6 *)&client_p->localClient->ip)->sin6_port);
else
#endif
port = ntohs(((struct sockaddr_in *)&client_p->localClient->ip)->sin_port);
if(ServerConfVhosted(server_p)) {
memcpy(&myipnum, &server_p->my_ipnum, sizeof(myipnum));
((struct sockaddr_in *)&myipnum)->sin_port = 0;
myipnum.ss_family = server_p->aftype;
} else if(server_p->aftype == AF_INET && ServerInfo.specific_ipv4_vhost) {
memcpy(&myipnum, &ServerInfo.ip, sizeof(myipnum));
((struct sockaddr_in *)&myipnum)->sin_port = 0;
myipnum.ss_family = AF_INET;
SET_SS_LEN(&myipnum, sizeof(struct sockaddr_in));
}
#ifdef RB_IPV6
else if((server_p->aftype == AF_INET6) && ServerInfo.specific_ipv6_vhost) {
memcpy(&myipnum, &ServerInfo.ip6, sizeof(myipnum));
((struct sockaddr_in6 *)&myipnum)->sin6_port = 0;
myipnum.ss_family = AF_INET6;
SET_SS_LEN(&myipnum, sizeof(struct sockaddr_in6));
}
#endif
else {
/* log */
ilog(L_SERVER, "Connecting to %s[%s] port %d (%s)", client_p->name, client_p->sockhost, port,
#ifdef RB_IPV6
server_p->aftype == AF_INET6 ? "IPv6" :
#endif
(server_p->aftype == AF_INET ? "IPv4" : "?"));
if(ServerConfSSL(server_p)) {
rb_connect_tcp(client_p->localClient->F, (struct sockaddr *)&client_p->localClient->ip,
NULL, 0, serv_connect_ssl_callback,
client_p, ConfigFileEntry.connect_timeout);
} else
rb_connect_tcp(client_p->localClient->F, (struct sockaddr *)&client_p->localClient->ip,
NULL, 0, serv_connect_callback,
client_p, ConfigFileEntry.connect_timeout);
return 1;
}
/* log */
rb_inet_ntop_sock((struct sockaddr *)&myipnum, vhoststr, sizeof vhoststr);
ilog(L_SERVER, "Connecting to %s[%s] port %d (%s) (vhost %s)", client_p->name, client_p->sockhost, port,
#ifdef RB_IPV6
server_p->aftype == AF_INET6 ? "IPv6" :
#endif
(server_p->aftype == AF_INET ? "IPv4" : "?"), vhoststr);
if(ServerConfSSL(server_p))
rb_connect_tcp(client_p->localClient->F, (struct sockaddr *)&client_p->localClient->ip,
(struct sockaddr *) &myipnum,
GET_SS_LEN(&myipnum), serv_connect_ssl_callback, client_p,
ConfigFileEntry.connect_timeout);
else
rb_connect_tcp(client_p->localClient->F, (struct sockaddr *)&client_p->localClient->ip,
(struct sockaddr *) &myipnum,
GET_SS_LEN(&myipnum), serv_connect_callback, client_p,
ConfigFileEntry.connect_timeout);
return 1;
}
static void
serv_connect_dns_callback(void *vptr, struct DNSReply *reply)
{
struct Client *client_p = vptr;
uint16_t port;
rb_free(client_p->localClient->dnsquery);
client_p->localClient->dnsquery = NULL;
if (reply == NULL) {
sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL, "Cannot resolve hostname for %s",
client_p->name);
ilog(L_SERVER, "Cannot resolve hostname for %s",
log_client_name(client_p, HIDE_IP));
exit_client(client_p, client_p, &me, "Cannot resolve hostname");
return;
}
#ifdef RB_IPV6
if(reply->addr.ss_family == AF_INET6)
port = ((struct sockaddr_in6 *)&client_p->localClient->ip)->sin6_port;
else
#endif
port = ((struct sockaddr_in *)&client_p->localClient->ip)->sin_port;
memcpy(&client_p->localClient->ip, &reply->addr, sizeof(client_p->localClient->ip));
#ifdef RB_IPV6
if(reply->addr.ss_family == AF_INET6)
((struct sockaddr_in6 *)&client_p->localClient->ip)->sin6_port = port;
else
#endif
((struct sockaddr_in *)&client_p->localClient->ip)->sin_port = port;
/* Set sockhost properly now -- jilles */
rb_inet_ntop_sock((struct sockaddr *)&client_p->localClient->ip,
client_p->sockhost, sizeof client_p->sockhost);
serv_connect_resolved(client_p);
}
/*
* serv_connect() - initiate a server connection
*
* inputs - pointer to conf
* - pointer to client doing the connet
* output -
* side effects -
*
* This code initiates a connection to a server. It first checks to make
* sure the given server exists. If this is the case, it creates a socket,
* creates a client, saves the socket information in the client, and
* initiates a connection to the server through rb_connect_tcp(). The
* completion of this goes through serv_completed_connection().
*
* We return 1 if the connection is attempted, since we don't know whether
* it suceeded or not, and 0 if it fails in here somewhere.
*/
int
serv_connect(struct server_conf *server_p, struct Client *by)
{
struct Client *client_p;
struct rb_sockaddr_storage theiripnum;
rb_fde_t *F;
char note[HOSTLEN + 10];
s_assert(server_p != NULL);
if(server_p == NULL)
return 0;
/*
* Make sure this server isn't already connected
*/
if((client_p = find_server(NULL, server_p->name))) {
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"Server %s already present from %s",
server_p->name, client_p->name);
if(by && IsPerson(by) && !MyClient(by))
sendto_one_notice(by, ":Server %s already present from %s",
server_p->name, client_p->name);
return 0;
}
/* create a socket for the server connection */
if((F = rb_socket(server_p->aftype, SOCK_STREAM, 0, NULL)) == NULL) {
ilog_error("opening a stream socket");
return 0;
}
snprintf(note, sizeof note, "Server: %s", server_p->name);
rb_note(F, note);
/* Create a local client */
client_p = make_client(NULL);
/* Copy in the server, hostname, fd
* The sockhost may be a hostname, this will be corrected later
* -- jilles
*/
rb_strlcpy(client_p->name, server_p->name, sizeof(client_p->name));
rb_strlcpy(client_p->host, server_p->host, sizeof(client_p->host));
rb_strlcpy(client_p->sockhost, server_p->host, sizeof(client_p->sockhost));
client_p->localClient->F = F;
add_to_cli_fd_hash(client_p);
/*
* Set up the initial server evilness, ripped straight from
* connect_server(), so don't blame me for it being evil.
* -- adrian
*/
if(!rb_set_buffers(client_p->localClient->F, READBUF_SIZE)) {
ilog_error("setting the buffer size for a server connection");
}
/*
* Attach config entries to client here rather than in
* serv_connect_callback(). This to avoid null pointer references.
*/
attach_server_conf(client_p, server_p);
/*
* at this point we have a connection in progress and C/N lines
* attached to the client, the socket info should be saved in the
* client and it should either be resolved or have a valid address.
*
* The socket has been connected or connect is in progress.
*/
make_server(client_p);
if(by && IsPerson(by)) {
strcpy(client_p->serv->by, by->name);
if(client_p->serv->user)
free_user(client_p->serv->user, NULL);
client_p->serv->user = by->user;
by->user->refcnt++;
} else {
strcpy(client_p->serv->by, "AutoConn.");
if(client_p->serv->user)
free_user(client_p->serv->user, NULL);
client_p->serv->user = NULL;
}
SetConnecting(client_p);
rb_dlinkAddTail(client_p, &client_p->node, &global_client_list);
if (rb_inet_pton_sock(server_p->host, (struct sockaddr *)&theiripnum) > 0) {
memcpy(&client_p->localClient->ip, &theiripnum, sizeof(client_p->localClient->ip));
#ifdef RB_IPV6
if(theiripnum.ss_family == AF_INET6)
((struct sockaddr_in6 *)&client_p->localClient->ip)->sin6_port = htons(server_p->port);
else
#endif
((struct sockaddr_in *)&client_p->localClient->ip)->sin_port = htons(server_p->port);
return serv_connect_resolved(client_p);
} else {
#ifdef RB_IPV6
if(theiripnum.ss_family == AF_INET6)
((struct sockaddr_in6 *)&client_p->localClient->ip)->sin6_port = htons(server_p->port);
else
#endif
((struct sockaddr_in *)&client_p->localClient->ip)->sin_port = htons(server_p->port);
client_p->localClient->dnsquery = rb_malloc(sizeof(struct DNSQuery));
client_p->localClient->dnsquery->ptr = client_p;
client_p->localClient->dnsquery->callback = serv_connect_dns_callback;
gethost_byname_type(server_p->host, client_p->localClient->dnsquery,
#ifdef RB_IPV6
server_p->aftype == AF_INET6 ? T_AAAA :
#endif
T_A);
return 1;
}
}
static void
serv_connect_ssl_callback(rb_fde_t *F, int status, void *data)
{
struct Client *client_p = data;
rb_fde_t *xF[2];
rb_connect_sockaddr(F, (struct sockaddr *)&client_p->localClient->ip, sizeof(client_p->localClient->ip));
if(status != RB_OK) {
/* Print error message, just like non-SSL. */
serv_connect_callback(F, status, data);
return;
}
if(rb_socketpair(AF_UNIX, SOCK_STREAM, 0, &xF[0], &xF[1], "Outgoing ssld connection") == -1) {
ilog_error("rb_socketpair failed for server");
serv_connect_callback(F, RB_ERROR, data);
return;
}
del_from_cli_fd_hash(client_p);
client_p->localClient->F = xF[0];
add_to_cli_fd_hash(client_p);
client_p->localClient->ssl_ctl = start_ssld_connect(F, xF[1], rb_get_fd(xF[0]));
SetSSL(client_p);
serv_connect_callback(client_p->localClient->F, RB_OK, client_p);
}
/*
* serv_connect_callback() - complete a server connection.
*
* This routine is called after the server connection attempt has
* completed. If unsucessful, an error is sent to ops and the client
* is closed. If sucessful, it goes through the initialisation/check
* procedures, the capabilities are sent, and the socket is then
* marked for reading.
*/
static void
serv_connect_callback(rb_fde_t *F, int status, void *data)
{
struct Client *client_p = data;
struct server_conf *server_p;
char *errstr;
/* First, make sure its a real client! */
s_assert(client_p != NULL);
s_assert(client_p->localClient->F == F);
if(client_p == NULL)
return;
/* while we were waiting for the callback, its possible this already
* linked in.. --fl
*/
if(find_server(NULL, client_p->name) != NULL) {
exit_client(client_p, client_p, &me, "Server Exists");
return;
}
if(client_p->localClient->ssl_ctl == NULL)
rb_connect_sockaddr(F, (struct sockaddr *)&client_p->localClient->ip, sizeof(client_p->localClient->ip));
/* Check the status */
if(status != RB_OK) {
/* COMM_ERR_TIMEOUT wont have an errno associated with it,
* the others will.. --fl
*/
if(status == RB_ERR_TIMEOUT) {
sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL,
"Error connecting to %s[%s]: %s",
client_p->name,
client_p->sockhost,
rb_errstr(status));
ilog(L_SERVER, "Error connecting to %s[%s]: %s",
client_p->name, client_p->sockhost,
rb_errstr(status));
} else {
errstr = strerror(rb_get_sockerr(F));
sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL,
"Error connecting to %s[%s]: %s (%s)",
client_p->name,
"255.255.255.255",
rb_errstr(status), errstr);
ilog(L_SERVER, "Error connecting to %s[%s]: %s (%s)",
client_p->name, client_p->sockhost,
rb_errstr(status), errstr);
}
exit_client(client_p, client_p, &me, rb_errstr(status));
return;
}
/* COMM_OK, so continue the connection procedure */
/* Get the C/N lines */
if((server_p = client_p->localClient->att_sconf) == NULL) {
sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL, "Lost connect{} block for %s",
client_p->name);
exit_client(client_p, client_p, &me, "Lost connect{} block");
return;
}
/* Next, send the initial handshake */
SetHandshake(client_p);
/* the server may be linking based on certificate fingerprint now. --nenolod */
sendto_one(client_p, "PASS %s TS %d :%s",
EmptyString(server_p->spasswd) ? "*" : server_p->spasswd, TS_CURRENT, me.id);
/* pass my info to the new server */
send_capabilities(client_p, default_server_capabs
| (ServerConfCompressed(server_p) ? CAP_ZIP_SUPPORTED : 0)
| (ServerConfTb(server_p) ? CAP_TB : 0));
sendto_one(client_p, "SERVER %s 1 :%s%s",
me.name,
ConfigServerHide.hidden ? "(H) " : "", me.info);
/*
* If we've been marked dead because a send failed, just exit
* here now and save everyone the trouble of us ever existing.
*/
if(IsAnyDead(client_p)) {
sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL,
"%s went dead during handshake", client_p->name);
exit_client(client_p, client_p, &me, "Went dead during handshake");
return;
}
/* don't move to serv_list yet -- we haven't sent a burst! */
/* If we get here, we're ok, so lets start reading some data */
read_packet(F, client_p);
}
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