| 1 |
/* |
| 2 |
* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) |
| 3 |
* |
| 4 |
* Copyright (c) 1997-2018 ircd-hybrid development team |
| 5 |
* |
| 6 |
* This program is free software; you can redistribute it and/or modify |
| 7 |
* it under the terms of the GNU General Public License as published by |
| 8 |
* the Free Software Foundation; either version 2 of the License, or |
| 9 |
* (at your option) any later version. |
| 10 |
* |
| 11 |
* This program is distributed in the hope that it will be useful, |
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 |
* GNU General Public License for more details. |
| 15 |
* |
| 16 |
* You should have received a copy of the GNU General Public License |
| 17 |
* along with this program; if not, write to the Free Software |
| 18 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 |
| 19 |
* USA |
| 20 |
*/ |
| 21 |
|
| 22 |
/*! \file server.c |
| 23 |
* \brief Server related functions. |
| 24 |
* \version $Id$ |
| 25 |
*/ |
| 26 |
|
| 27 |
#include "stdinc.h" |
| 28 |
#include "list.h" |
| 29 |
#include "client.h" |
| 30 |
#include "event.h" |
| 31 |
#include "hash.h" |
| 32 |
#include "irc_string.h" |
| 33 |
#include "ircd.h" |
| 34 |
#include "ircd_defs.h" |
| 35 |
#include "s_bsd.h" |
| 36 |
#include "packet.h" |
| 37 |
#include "conf.h" |
| 38 |
#include "server.h" |
| 39 |
#include "server_capab.h" |
| 40 |
#include "log.h" |
| 41 |
#include "send.h" |
| 42 |
#include "memory.h" |
| 43 |
#include "parse.h" |
| 44 |
|
| 45 |
|
| 46 |
dlink_list flatten_links; |
| 47 |
static void server_connect_callback(fde_t *, int, void *); |
| 48 |
|
| 49 |
|
| 50 |
/* |
| 51 |
* write_links_file |
| 52 |
* |
| 53 |
* inputs - void pointer which is not used |
| 54 |
* output - NONE |
| 55 |
* side effects - called from an event, write out list of linked servers |
| 56 |
* but in no particular order. |
| 57 |
*/ |
| 58 |
void |
| 59 |
write_links_file(void *unused) |
| 60 |
{ |
| 61 |
FILE *file = NULL; |
| 62 |
dlink_node *node, *node_next; |
| 63 |
char buff[IRCD_BUFSIZE] = ""; |
| 64 |
|
| 65 |
if (EmptyString(ConfigServerHide.flatten_links_file)) |
| 66 |
return; |
| 67 |
|
| 68 |
if ((file = fopen(ConfigServerHide.flatten_links_file, "w")) == NULL) |
| 69 |
{ |
| 70 |
ilog(LOG_TYPE_IRCD, "Couldn't open \"%s\": %s", ConfigServerHide.flatten_links_file, |
| 71 |
strerror(errno)); |
| 72 |
return; |
| 73 |
} |
| 74 |
|
| 75 |
DLINK_FOREACH_SAFE(node, node_next, flatten_links.head) |
| 76 |
{ |
| 77 |
dlinkDelete(node, &flatten_links); |
| 78 |
xfree(node->data); |
| 79 |
free_dlink_node(node); |
| 80 |
} |
| 81 |
|
| 82 |
DLINK_FOREACH(node, global_server_list.head) |
| 83 |
{ |
| 84 |
const struct Client *target_p = node->data; |
| 85 |
|
| 86 |
/* |
| 87 |
* Skip hidden servers, aswell as ourselves, since we already send |
| 88 |
* ourselves in /links |
| 89 |
*/ |
| 90 |
if (IsHidden(target_p) || IsMe(target_p)) |
| 91 |
continue; |
| 92 |
|
| 93 |
if (HasFlag(target_p, FLAGS_SERVICE) && ConfigServerHide.hide_services) |
| 94 |
continue; |
| 95 |
|
| 96 |
/* |
| 97 |
* Attempt to format the file in such a way it follows the usual links output |
| 98 |
* ie "servername uplink :hops info" |
| 99 |
* Mostly for aesthetic reasons - makes it look pretty in mIRC ;) |
| 100 |
* - madmax |
| 101 |
*/ |
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snprintf(buff, sizeof(buff), "%s %s :1 %s", target_p->name, |
| 103 |
me.name, target_p->info); |
| 104 |
dlinkAddTail(xstrdup(buff), make_dlink_node(), &flatten_links); |
| 105 |
snprintf(buff, sizeof(buff), "%s %s :1 %s\n", target_p->name, |
| 106 |
me.name, target_p->info); |
| 107 |
|
| 108 |
fputs(buff, file); |
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} |
| 110 |
|
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fclose(file); |
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} |
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|
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void |
| 115 |
read_links_file(void) |
| 116 |
{ |
| 117 |
FILE *file = NULL; |
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char *p = NULL; |
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char buff[IRCD_BUFSIZE] = ""; |
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|
| 121 |
if (EmptyString(ConfigServerHide.flatten_links_file)) |
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return; |
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|
| 124 |
if ((file = fopen(ConfigServerHide.flatten_links_file, "r")) == NULL) |
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{ |
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ilog(LOG_TYPE_IRCD, "Couldn't open \"%s\": %s", ConfigServerHide.flatten_links_file, |
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strerror(errno)); |
| 128 |
return; |
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} |
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|
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while (fgets(buff, sizeof(buff), file)) |
| 132 |
{ |
| 133 |
if ((p = strchr(buff, '\n'))) |
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*p = '\0'; |
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|
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dlinkAddTail(xstrdup(buff), make_dlink_node(), &flatten_links); |
| 137 |
} |
| 138 |
|
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fclose(file); |
| 140 |
} |
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|
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/* server_hunt() |
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* Do the basic thing in delivering the message (command) |
| 144 |
* across the relays to the specific server (server) for |
| 145 |
* actions. |
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* |
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* Note: The command is a format string and *MUST* be |
| 148 |
* of prefixed style (e.g. ":%s COMMAND %s ..."). |
| 149 |
* Command can have only max 8 parameters. |
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* |
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* server parv[server] is the parameter identifying the |
| 152 |
* target server. |
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* |
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* *WARNING* |
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* parv[server] is replaced with the pointer to the |
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* real servername from the matched client (I'm lazy |
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* now --msa). |
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* |
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* returns: (see #defines) |
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*/ |
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const struct server_hunt * |
| 162 |
server_hunt(struct Client *source_p, const char *command, |
| 163 |
const int server, const int parc, char *parv[]) |
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{ |
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static struct server_hunt hunt; |
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struct server_hunt *const h = &hunt; |
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dlink_node *node; |
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|
| 169 |
/* Assume it's me, if no server */ |
| 170 |
if (parc <= server || EmptyString(parv[server])) |
| 171 |
{ |
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h->target_p = &me; |
| 173 |
h->ret = HUNTED_ISME; |
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return h; |
| 175 |
} |
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|
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if ((h->target_p = find_person(source_p, parv[server])) == NULL) |
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h->target_p = hash_find_server(parv[server]); |
| 179 |
|
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/* |
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* These are to pickup matches that would cause the following |
| 182 |
* message to go in the wrong direction while doing quick fast |
| 183 |
* non-matching lookups. |
| 184 |
*/ |
| 185 |
if (h->target_p) |
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if (h->target_p->from == source_p->from && !MyConnect(h->target_p)) |
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h->target_p = NULL; |
| 188 |
|
| 189 |
if (!h->target_p && has_wildcards(parv[server])) |
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{ |
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DLINK_FOREACH(node, global_server_list.head) |
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{ |
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struct Client *tmp = node->data; |
| 194 |
|
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assert(IsMe(tmp) || IsServer(tmp)); |
| 196 |
if (!match(parv[server], tmp->name)) |
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{ |
| 198 |
if (tmp->from == source_p->from && !MyConnect(tmp)) |
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continue; |
| 200 |
|
| 201 |
h->target_p = tmp; |
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break; |
| 203 |
} |
| 204 |
} |
| 205 |
|
| 206 |
if (!h->target_p) |
| 207 |
{ |
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DLINK_FOREACH(node, global_client_list.head) |
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{ |
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struct Client *tmp = node->data; |
| 211 |
|
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assert(IsClient(tmp)); |
| 213 |
if (!match(parv[server], tmp->name)) |
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{ |
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if (tmp->from == source_p->from && !MyConnect(tmp)) |
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continue; |
| 217 |
|
| 218 |
h->target_p = tmp; |
| 219 |
break; |
| 220 |
} |
| 221 |
} |
| 222 |
} |
| 223 |
} |
| 224 |
|
| 225 |
if (h->target_p) |
| 226 |
{ |
| 227 |
assert(IsMe(h->target_p) || IsServer(h->target_p) || IsClient(h->target_p)); |
| 228 |
if (IsMe(h->target_p) || MyClient(h->target_p)) |
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{ |
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h->ret = HUNTED_ISME; |
| 231 |
return h; |
| 232 |
} |
| 233 |
|
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parv[server] = h->target_p->id; |
| 235 |
sendto_one(h->target_p, command, source_p->id, |
| 236 |
parv[1], parv[2], parv[3], parv[4], |
| 237 |
parv[5], parv[6], parv[7], parv[8]); |
| 238 |
h->ret = HUNTED_PASS; |
| 239 |
return h; |
| 240 |
} |
| 241 |
|
| 242 |
sendto_one_numeric(source_p, &me, ERR_NOSUCHSERVER, parv[server]); |
| 243 |
h->ret = HUNTED_NOSUCH; |
| 244 |
return h; |
| 245 |
} |
| 246 |
|
| 247 |
/* try_connections() |
| 248 |
* |
| 249 |
* inputs - void pointer which is not used |
| 250 |
* output - NONE |
| 251 |
* side effects - |
| 252 |
* scan through configuration and try new connections. |
| 253 |
* Returns the calendar time when the next call to this |
| 254 |
* function should be made latest. (No harm done if this |
| 255 |
* is called earlier or later...) |
| 256 |
*/ |
| 257 |
void |
| 258 |
try_connections(void *unused) |
| 259 |
{ |
| 260 |
dlink_node *node; |
| 261 |
|
| 262 |
if (GlobalSetOptions.autoconn == 0) |
| 263 |
return; |
| 264 |
|
| 265 |
DLINK_FOREACH(node, connect_items.head) |
| 266 |
{ |
| 267 |
struct MaskItem *conf = node->data; |
| 268 |
|
| 269 |
assert(conf->type == CONF_SERVER); |
| 270 |
assert(conf->class); |
| 271 |
|
| 272 |
/* Also when already connecting! (update holdtimes) --SRB */ |
| 273 |
if (!conf->port || !IsConfAllowAutoConn(conf)) |
| 274 |
continue; |
| 275 |
|
| 276 |
/* |
| 277 |
* Skip this entry if the use of it is still on hold until |
| 278 |
* future. Otherwise handle this entry (and set it on hold |
| 279 |
* until next time). Will reset only hold times, if already |
| 280 |
* made one successfull connection... [this algorithm is |
| 281 |
* a bit fuzzy... -- msa >;) ] |
| 282 |
*/ |
| 283 |
if (conf->until > CurrentTime) |
| 284 |
continue; |
| 285 |
|
| 286 |
conf->until = CurrentTime + conf->class->con_freq; |
| 287 |
|
| 288 |
/* |
| 289 |
* Found a CONNECT config with port specified, scan clients |
| 290 |
* and see if this server is already connected? |
| 291 |
*/ |
| 292 |
if (hash_find_server(conf->name)) |
| 293 |
continue; |
| 294 |
|
| 295 |
if (conf->class->ref_count < conf->class->max_total) |
| 296 |
{ |
| 297 |
/* Move this entry to the end of the list, if not already last */ |
| 298 |
if (node->next) |
| 299 |
{ |
| 300 |
dlinkDelete(node, &connect_items); |
| 301 |
dlinkAddTail(conf, &conf->node, &connect_items); |
| 302 |
} |
| 303 |
|
| 304 |
if (find_servconn_in_progress(conf->name)) |
| 305 |
return; |
| 306 |
|
| 307 |
/* |
| 308 |
* We used to only print this if server_connect() actually |
| 309 |
* succeeded, but since comm_tcp_connect() can call the callback |
| 310 |
* immediately if there is an error, we were getting error messages |
| 311 |
* in the wrong order. SO, we just print out the activated line, |
| 312 |
* and let server_connect() / server_connect_callback() print an |
| 313 |
* error afterwards if it fails. |
| 314 |
* -- adrian |
| 315 |
*/ |
| 316 |
if (ConfigServerHide.hide_server_ips) |
| 317 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
| 318 |
"Connection to %s activated.", |
| 319 |
conf->name); |
| 320 |
else |
| 321 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
| 322 |
"Connection to %s[%s] activated.", |
| 323 |
conf->name, conf->host); |
| 324 |
|
| 325 |
server_connect(conf, NULL); |
| 326 |
/* We connect only one at time... */ |
| 327 |
return; |
| 328 |
} |
| 329 |
} |
| 330 |
} |
| 331 |
|
| 332 |
int |
| 333 |
valid_servname(const char *name) |
| 334 |
{ |
| 335 |
unsigned int dots = 0; |
| 336 |
const char *p = name; |
| 337 |
|
| 338 |
for (; *p; ++p) |
| 339 |
{ |
| 340 |
if (!IsServChar(*p)) |
| 341 |
return 0; |
| 342 |
|
| 343 |
if (*p == '.') |
| 344 |
++dots; |
| 345 |
} |
| 346 |
|
| 347 |
return dots && (p - name) <= HOSTLEN; |
| 348 |
} |
| 349 |
|
| 350 |
/* server_make() |
| 351 |
* |
| 352 |
* inputs - pointer to client struct |
| 353 |
* output - pointer to struct Server |
| 354 |
* side effects - add's an Server information block to a client |
| 355 |
* if it was not previously allocated. |
| 356 |
*/ |
| 357 |
struct Server * |
| 358 |
server_make(struct Client *client_p) |
| 359 |
{ |
| 360 |
if (client_p->serv == NULL) |
| 361 |
client_p->serv = xcalloc(sizeof(*client_p->serv)); |
| 362 |
|
| 363 |
return client_p->serv; |
| 364 |
} |
| 365 |
|
| 366 |
/* server_connect() - initiate a server connection |
| 367 |
* |
| 368 |
* inputs - pointer to conf |
| 369 |
* - pointer to client doing the connect |
| 370 |
* output - |
| 371 |
* side effects - |
| 372 |
* |
| 373 |
* This code initiates a connection to a server. It first checks to make |
| 374 |
* sure the given server exists. If this is the case, it creates a socket, |
| 375 |
* creates a client, saves the socket information in the client, and |
| 376 |
* initiates a connection to the server through comm_connect_tcp(). The |
| 377 |
* completion of this goes through serv_completed_connection(). |
| 378 |
* |
| 379 |
* We return 1 if the connection is attempted, since we don't know whether |
| 380 |
* it suceeded or not, and 0 if it fails in here somewhere. |
| 381 |
*/ |
| 382 |
int |
| 383 |
server_connect(struct MaskItem *conf, struct Client *by) |
| 384 |
{ |
| 385 |
char buf[HOSTIPLEN + 1] = ""; |
| 386 |
|
| 387 |
/* conversion structs */ |
| 388 |
struct sockaddr_in *v4; |
| 389 |
|
| 390 |
/* Make sure conf is useful */ |
| 391 |
assert(conf); |
| 392 |
assert(conf->type == CONF_SERVER); |
| 393 |
assert(hash_find_server(conf->name) == NULL); /* This should have been checked by the caller */ |
| 394 |
|
| 395 |
getnameinfo((const struct sockaddr *)&conf->addr, conf->addr.ss_len, |
| 396 |
buf, sizeof(buf), NULL, 0, NI_NUMERICHOST); |
| 397 |
ilog(LOG_TYPE_IRCD, "Connect to %s[%s] @%s", conf->name, conf->host, |
| 398 |
buf); |
| 399 |
|
| 400 |
/* Still processing a DNS lookup? -> exit */ |
| 401 |
if (conf->dns_pending) |
| 402 |
{ |
| 403 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
| 404 |
"Error connecting to %s: DNS lookup for connect{} in progress.", |
| 405 |
conf->name); |
| 406 |
return 0; |
| 407 |
} |
| 408 |
|
| 409 |
if (conf->dns_failed) |
| 410 |
{ |
| 411 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
| 412 |
"Error connecting to %s: DNS lookup for connect{} failed.", |
| 413 |
conf->name); |
| 414 |
return 0; |
| 415 |
} |
| 416 |
|
| 417 |
/* Create a socket for the server connection */ |
| 418 |
int fd = comm_socket(conf->addr.ss.ss_family, SOCK_STREAM, 0); |
| 419 |
if (fd == -1) |
| 420 |
{ |
| 421 |
/* Eek, failure to create the socket */ |
| 422 |
report_error(L_ALL, "opening stream socket to %s: %s", conf->name, errno); |
| 423 |
return 0; |
| 424 |
} |
| 425 |
|
| 426 |
/* Create a local client */ |
| 427 |
struct Client *client_p = client_make(NULL); |
| 428 |
|
| 429 |
/* Copy in the server, hostname, fd */ |
| 430 |
strlcpy(client_p->name, conf->name, sizeof(client_p->name)); |
| 431 |
strlcpy(client_p->host, conf->host, sizeof(client_p->host)); |
| 432 |
|
| 433 |
/* We already converted the ip once, so lets use it - stu */ |
| 434 |
strlcpy(client_p->sockhost, buf, sizeof(client_p->sockhost)); |
| 435 |
|
| 436 |
client_p->connection->fd = fd_open(fd, 1, NULL); |
| 437 |
|
| 438 |
/* Server names are always guaranteed under HOSTLEN chars */ |
| 439 |
fd_note(client_p->connection->fd, "Server: %s", client_p->name); |
| 440 |
|
| 441 |
/* |
| 442 |
* Attach config entries to client here rather than in server_connect_callback(). |
| 443 |
* This to avoid null pointer references. |
| 444 |
*/ |
| 445 |
conf_attach(client_p, conf); |
| 446 |
|
| 447 |
server_make(client_p); |
| 448 |
|
| 449 |
if (by && IsClient(by)) |
| 450 |
strlcpy(client_p->serv->by, by->name, sizeof(client_p->serv->by)); |
| 451 |
else |
| 452 |
strlcpy(client_p->serv->by, "AutoConn.", sizeof(client_p->serv->by)); |
| 453 |
|
| 454 |
SetConnecting(client_p); |
| 455 |
client_p->connection->aftype = conf->aftype; |
| 456 |
|
| 457 |
/* Now, initiate the connection */ |
| 458 |
/* XXX assume that a non 0 type means a specific bind address |
| 459 |
* for this connect. |
| 460 |
*/ |
| 461 |
switch (conf->aftype) |
| 462 |
{ |
| 463 |
case AF_INET: |
| 464 |
v4 = (struct sockaddr_in*)&conf->bind; |
| 465 |
|
| 466 |
if (v4->sin_addr.s_addr) |
| 467 |
{ |
| 468 |
struct irc_ssaddr ipn; |
| 469 |
|
| 470 |
memset(&ipn, 0, sizeof(ipn)); |
| 471 |
ipn.ss.ss_family = AF_INET; |
| 472 |
ipn.ss_port = 0; |
| 473 |
memcpy(&ipn, &conf->bind, sizeof(ipn)); |
| 474 |
|
| 475 |
comm_connect_tcp(client_p->connection->fd, conf->host, conf->port, |
| 476 |
(struct sockaddr *)&ipn, ipn.ss_len, |
| 477 |
server_connect_callback, client_p, conf->aftype, |
| 478 |
CONNECTTIMEOUT); |
| 479 |
} |
| 480 |
else if (ConfigServerInfo.specific_ipv4_vhost) |
| 481 |
{ |
| 482 |
struct irc_ssaddr ipn; |
| 483 |
|
| 484 |
memset(&ipn, 0, sizeof(ipn)); |
| 485 |
ipn.ss.ss_family = AF_INET; |
| 486 |
ipn.ss_port = 0; |
| 487 |
memcpy(&ipn, &ConfigServerInfo.ip, sizeof(ipn)); |
| 488 |
|
| 489 |
comm_connect_tcp(client_p->connection->fd, conf->host, conf->port, |
| 490 |
(struct sockaddr *)&ipn, ipn.ss_len, |
| 491 |
server_connect_callback, client_p, conf->aftype, |
| 492 |
CONNECTTIMEOUT); |
| 493 |
} |
| 494 |
else |
| 495 |
comm_connect_tcp(client_p->connection->fd, conf->host, conf->port, |
| 496 |
NULL, 0, server_connect_callback, client_p, conf->aftype, |
| 497 |
CONNECTTIMEOUT); |
| 498 |
break; |
| 499 |
case AF_INET6: |
| 500 |
{ |
| 501 |
struct irc_ssaddr ipn; |
| 502 |
struct sockaddr_in6 *v6; |
| 503 |
struct sockaddr_in6 *v6conf; |
| 504 |
|
| 505 |
memset(&ipn, 0, sizeof(ipn)); |
| 506 |
v6conf = (struct sockaddr_in6 *)&conf->bind; |
| 507 |
v6 = (struct sockaddr_in6 *)&ipn; |
| 508 |
|
| 509 |
if (memcmp(&v6conf->sin6_addr, &v6->sin6_addr, sizeof(struct in6_addr))) |
| 510 |
{ |
| 511 |
memcpy(&ipn, &conf->bind, sizeof(ipn)); |
| 512 |
ipn.ss.ss_family = AF_INET6; |
| 513 |
ipn.ss_port = 0; |
| 514 |
|
| 515 |
comm_connect_tcp(client_p->connection->fd, |
| 516 |
conf->host, conf->port, |
| 517 |
(struct sockaddr *)&ipn, ipn.ss_len, |
| 518 |
server_connect_callback, client_p, |
| 519 |
conf->aftype, CONNECTTIMEOUT); |
| 520 |
} |
| 521 |
else if (ConfigServerInfo.specific_ipv6_vhost) |
| 522 |
{ |
| 523 |
memcpy(&ipn, &ConfigServerInfo.ip6, sizeof(ipn)); |
| 524 |
ipn.ss.ss_family = AF_INET6; |
| 525 |
ipn.ss_port = 0; |
| 526 |
|
| 527 |
comm_connect_tcp(client_p->connection->fd, |
| 528 |
conf->host, conf->port, |
| 529 |
(struct sockaddr *)&ipn, ipn.ss_len, |
| 530 |
server_connect_callback, client_p, |
| 531 |
conf->aftype, CONNECTTIMEOUT); |
| 532 |
} |
| 533 |
else |
| 534 |
comm_connect_tcp(client_p->connection->fd, |
| 535 |
conf->host, conf->port, |
| 536 |
NULL, 0, server_connect_callback, client_p, |
| 537 |
conf->aftype, CONNECTTIMEOUT); |
| 538 |
} |
| 539 |
} |
| 540 |
|
| 541 |
/* |
| 542 |
* At this point we have a connection in progress and a connect {} block |
| 543 |
* attached to the client, the socket info should be saved in the client |
| 544 |
* and it should either be resolved or have a valid address. |
| 545 |
* |
| 546 |
* The socket has been connected or connect is in progress. |
| 547 |
*/ |
| 548 |
return 1; |
| 549 |
} |
| 550 |
|
| 551 |
static void |
| 552 |
server_finish_tls_handshake(struct Client *client_p) |
| 553 |
{ |
| 554 |
const struct MaskItem *conf = find_conf_name(&client_p->connection->confs, |
| 555 |
client_p->name, CONF_SERVER); |
| 556 |
if (!conf) |
| 557 |
{ |
| 558 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ADMIN, SEND_NOTICE, |
| 559 |
"Lost connect{} block for %s", client_get_name(client_p, SHOW_IP)); |
| 560 |
sendto_realops_flags(UMODE_SERVNOTICE, L_OPER, SEND_NOTICE, |
| 561 |
"Lost connect{} block for %s", client_get_name(client_p, MASK_IP)); |
| 562 |
|
| 563 |
exit_client(client_p, "Lost connect{} block"); |
| 564 |
return; |
| 565 |
} |
| 566 |
|
| 567 |
sendto_one(client_p, "PASS %s TS %u %s", conf->spasswd, TS_CURRENT, me.id); |
| 568 |
|
| 569 |
sendto_one(client_p, "CAPAB :%s", capab_get(NULL)); |
| 570 |
|
| 571 |
sendto_one(client_p, "SERVER %s 1 :%s%s", |
| 572 |
me.name, ConfigServerHide.hidden ? "(H) " : "", |
| 573 |
me.info); |
| 574 |
|
| 575 |
/* If we get here, we're ok, so lets start reading some data */ |
| 576 |
read_packet(client_p->connection->fd, client_p); |
| 577 |
} |
| 578 |
|
| 579 |
static void |
| 580 |
server_tls_handshake(fde_t *F, void *data) |
| 581 |
{ |
| 582 |
struct Client *client_p = data; |
| 583 |
const char *sslerr = NULL; |
| 584 |
|
| 585 |
assert(client_p); |
| 586 |
assert(client_p->connection); |
| 587 |
assert(client_p->connection->fd); |
| 588 |
assert(client_p->connection->fd == F); |
| 589 |
|
| 590 |
tls_handshake_status_t ret = tls_handshake(&F->ssl, TLS_ROLE_CLIENT, &sslerr); |
| 591 |
if (ret != TLS_HANDSHAKE_DONE) |
| 592 |
{ |
| 593 |
if ((CurrentTime - client_p->connection->firsttime) > CONNECTTIMEOUT) |
| 594 |
{ |
| 595 |
exit_client(client_p, "Timeout during TLS handshake"); |
| 596 |
return; |
| 597 |
} |
| 598 |
|
| 599 |
switch (ret) |
| 600 |
{ |
| 601 |
case TLS_HANDSHAKE_WANT_WRITE: |
| 602 |
comm_setselect(F, COMM_SELECT_WRITE, |
| 603 |
server_tls_handshake, client_p, CONNECTTIMEOUT); |
| 604 |
return; |
| 605 |
case TLS_HANDSHAKE_WANT_READ: |
| 606 |
comm_setselect(F, COMM_SELECT_READ, |
| 607 |
server_tls_handshake, client_p, CONNECTTIMEOUT); |
| 608 |
return; |
| 609 |
default: |
| 610 |
{ |
| 611 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
| 612 |
"Error connecting to %s: %s", client_p->name, |
| 613 |
sslerr ? sslerr : "unknown TLS error"); |
| 614 |
exit_client(client_p, "Error during TLS handshake"); |
| 615 |
return; |
| 616 |
} |
| 617 |
} |
| 618 |
} |
| 619 |
|
| 620 |
comm_settimeout(F, 0, NULL, NULL); |
| 621 |
|
| 622 |
if (!tls_verify_cert(&F->ssl, ConfigServerInfo.message_digest_algorithm, &client_p->certfp)) |
| 623 |
ilog(LOG_TYPE_IRCD, "Server %s!%s@%s gave bad TLS client certificate", |
| 624 |
client_p->name, client_p->username, client_p->host); |
| 625 |
|
| 626 |
server_finish_tls_handshake(client_p); |
| 627 |
} |
| 628 |
|
| 629 |
static void |
| 630 |
server_tls_connect_init(struct Client *client_p, const struct MaskItem *conf, fde_t *F) |
| 631 |
{ |
| 632 |
assert(client_p); |
| 633 |
assert(client_p->connection); |
| 634 |
assert(client_p->connection->fd); |
| 635 |
assert(client_p->connection->fd == F); |
| 636 |
|
| 637 |
if (!tls_new(&F->ssl, F->fd, TLS_ROLE_CLIENT)) |
| 638 |
{ |
| 639 |
SetDead(client_p); |
| 640 |
exit_client(client_p, "TLS context initialization failed"); |
| 641 |
return; |
| 642 |
} |
| 643 |
|
| 644 |
if (!EmptyString(conf->cipher_list)) |
| 645 |
tls_set_ciphers(&F->ssl, conf->cipher_list); |
| 646 |
|
| 647 |
server_tls_handshake(F, client_p); |
| 648 |
} |
| 649 |
|
| 650 |
/* server_connect_callback() - complete a server connection. |
| 651 |
* |
| 652 |
* This routine is called after the server connection attempt has |
| 653 |
* completed. If unsucessful, an error is sent to ops and the client |
| 654 |
* is closed. If sucessful, it goes through the initialisation/check |
| 655 |
* procedures, the capabilities are sent, and the socket is then |
| 656 |
* marked for reading. |
| 657 |
*/ |
| 658 |
static void |
| 659 |
server_connect_callback(fde_t *F, int status, void *data) |
| 660 |
{ |
| 661 |
struct Client *const client_p = data; |
| 662 |
|
| 663 |
/* First, make sure it's a real client! */ |
| 664 |
assert(client_p); |
| 665 |
assert(client_p->connection); |
| 666 |
assert(client_p->connection->fd); |
| 667 |
assert(client_p->connection->fd == F); |
| 668 |
|
| 669 |
/* Next, for backward purposes, record the ip of the server */ |
| 670 |
memcpy(&client_p->connection->ip, &F->connect.hostaddr, sizeof(client_p->connection->ip)); |
| 671 |
|
| 672 |
/* Check the status */ |
| 673 |
if (status != COMM_OK) |
| 674 |
{ |
| 675 |
/* We have an error, so report it and quit */ |
| 676 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ADMIN, SEND_NOTICE, |
| 677 |
"Error connecting to %s: %s", |
| 678 |
client_get_name(client_p, SHOW_IP), comm_errstr(status)); |
| 679 |
sendto_realops_flags(UMODE_SERVNOTICE, L_OPER, SEND_NOTICE, |
| 680 |
"Error connecting to %s: %s", |
| 681 |
client_get_name(client_p, MASK_IP), comm_errstr(status)); |
| 682 |
|
| 683 |
/* |
| 684 |
* If a fd goes bad, call dead_link() the socket is no |
| 685 |
* longer valid for reading or writing. |
| 686 |
*/ |
| 687 |
dead_link_on_write(client_p, 0); |
| 688 |
return; |
| 689 |
} |
| 690 |
|
| 691 |
/* COMM_OK, so continue the connection procedure */ |
| 692 |
/* Get the connect {} block */ |
| 693 |
const struct MaskItem *conf = find_conf_name(&client_p->connection->confs, |
| 694 |
client_p->name, CONF_SERVER); |
| 695 |
if (!conf) |
| 696 |
{ |
| 697 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ADMIN, SEND_NOTICE, |
| 698 |
"Lost connect{} block for %s", client_get_name(client_p, SHOW_IP)); |
| 699 |
sendto_realops_flags(UMODE_SERVNOTICE, L_OPER, SEND_NOTICE, |
| 700 |
"Lost connect{} block for %s", client_get_name(client_p, MASK_IP)); |
| 701 |
|
| 702 |
exit_client(client_p, "Lost connect{} block"); |
| 703 |
return; |
| 704 |
} |
| 705 |
|
| 706 |
/* Next, send the initial handshake */ |
| 707 |
SetHandshake(client_p); |
| 708 |
|
| 709 |
if (IsConfSSL(conf)) |
| 710 |
{ |
| 711 |
server_tls_connect_init(client_p, conf, F); |
| 712 |
return; |
| 713 |
} |
| 714 |
|
| 715 |
sendto_one(client_p, "PASS %s TS %u %s", conf->spasswd, TS_CURRENT, me.id); |
| 716 |
|
| 717 |
sendto_one(client_p, "CAPAB :%s", capab_get(NULL)); |
| 718 |
|
| 719 |
sendto_one(client_p, "SERVER %s 1 :%s%s", me.name, |
| 720 |
ConfigServerHide.hidden ? "(H) " : "", me.info); |
| 721 |
|
| 722 |
/* If we get here, we're ok, so lets start reading some data */ |
| 723 |
read_packet(client_p->connection->fd, client_p); |
| 724 |
} |
| 725 |
|
| 726 |
struct Client * |
| 727 |
find_servconn_in_progress(const char *name) |
| 728 |
{ |
| 729 |
dlink_node *ptr; |
| 730 |
|
| 731 |
DLINK_FOREACH(ptr, unknown_list.head) |
| 732 |
{ |
| 733 |
struct Client *cptr = ptr->data; |
| 734 |
|
| 735 |
if (cptr->name[0]) |
| 736 |
if (!irccmp(name, cptr->name)) |
| 737 |
return cptr; |
| 738 |
} |
| 739 |
|
| 740 |
return NULL; |
| 741 |
} |
