1 /************************************************************************
2 * IRC - Internet Relay Chat, src/s_auth.c
3 * Copyright (C) 1992 Darren Reed
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 1, or (at your option)
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 * July 6, 1999 - Rewrote most of the code here. When a client connects
21 * to the server and passes initial socket validation checks, it
22 * is owned by this module (auth) which returns it to the rest of the
23 * server when dns and auth queries are finished. Until the client is
24 * released, the server does not know it exists and does not process
25 * any messages from it.
26 * --Bleep Thomas Helvey <tomh@inxpress.net>
28 * December 26, 2005 - Rewrite the flag handling and integrate that with
29 * an IRCnet-style IAuth protocol.
33 * @brief Implementation of DNS and ident lookups.
43 #include "ircd_alloc.h"
44 #include "ircd_chattr.h"
45 #include "ircd_events.h"
46 #include "ircd_features.h"
48 #include "ircd_osdep.h"
49 #include "ircd_reply.h"
50 #include "ircd_snprintf.h"
51 #include "ircd_string.h"
53 #include "msg.h" /* for MAXPARA */
56 #include "querycmds.h"
71 #include <sys/socket.h>
72 #include <sys/ioctl.h>
74 /** Pending operations during registration. */
75 enum AuthRequestFlag {
76 AR_AUTH_PENDING, /**< ident connecting or waiting for response */
77 AR_DNS_PENDING, /**< dns request sent, waiting for response */
78 AR_CAP_PENDING, /**< in middle of CAP negotiations */
79 AR_NEEDS_PONG, /**< user has not PONGed */
80 AR_NEEDS_USER, /**< user must send USER command */
81 AR_NEEDS_NICK, /**< user must send NICK command */
82 AR_LAST_SCAN = AR_NEEDS_NICK, /**< maximum flag to scan through */
83 AR_IAUTH_PENDING, /**< iauth request sent, waiting for response */
84 AR_IAUTH_HURRY, /**< we told iauth to hurry up */
85 AR_IAUTH_USERNAME, /**< iauth sent a username (preferred or forced) */
86 AR_IAUTH_FUSERNAME, /**< iauth sent a forced username */
87 AR_PASSWORD_CHECKED, /**< client password already checked */
91 DECLARE_FLAGSET(AuthRequestFlags, AR_NUM_FLAGS);
93 /** Stores registration state of a client. */
95 struct AuthRequest* next; /**< linked list node ptr */
96 struct AuthRequest* prev; /**< linked list node ptr */
97 struct Client* client; /**< pointer to client struct for request */
98 struct irc_sockaddr local; /**< local endpoint address */
99 struct irc_in_addr original; /**< original client IP address */
100 struct Socket socket; /**< socket descriptor for auth queries */
101 struct Timer timeout; /**< timeout timer for ident and dns queries */
102 struct AuthRequestFlags flags; /**< current state of request */
103 unsigned int cookie; /**< cookie the user must PONG */
104 unsigned short port; /**< client's remote port number */
107 /** Array of message text (with length) pairs for AUTH status
108 * messages. Indexed using #ReportType.
113 } HeaderMessages [] = {
114 #define MSG(STR) { STR, sizeof(STR) - 1 }
115 MSG("NOTICE AUTH :*** Looking up your hostname\r\n"),
116 MSG("NOTICE AUTH :*** Found your hostname\r\n"),
117 MSG("NOTICE AUTH :*** Couldn't look up your hostname\r\n"),
118 MSG("NOTICE AUTH :*** Checking Ident\r\n"),
119 MSG("NOTICE AUTH :*** Got ident response\r\n"),
120 MSG("NOTICE AUTH :*** No ident response\r\n"),
121 MSG("NOTICE AUTH :*** \r\n"),
122 MSG("NOTICE AUTH :*** Your forward and reverse DNS do not match, "
123 "ignoring hostname.\r\n"),
124 MSG("NOTICE AUTH :*** Invalid hostname\r\n")
128 /** Enum used to index messages in the HeaderMessages[] array. */
141 /** Sends response \a r (from #ReportType) to client \a c. */
142 #define sendheader(c, r) \
143 send(cli_fd(c), HeaderMessages[(r)].message, HeaderMessages[(r)].length, 0)
145 /** Enumeration of IAuth connection flags. */
148 IAUTH_BLOCKED, /**< socket buffer full */
149 IAUTH_CLOSING, /**< candidate to be disposed */
150 /* The following flags are controlled by iauth's "O" options command. */
151 IAUTH_ADDLINFO, /**< Send additional info
152 * (password and username). */
153 IAUTH_FIRST_OPTION = IAUTH_ADDLINFO, /**< First flag that is a policy option. */
154 IAUTH_REQUIRED, /**< IAuth completion required for registration. */
155 IAUTH_TIMEOUT, /**< Refuse new connections if IAuth is behind. */
156 IAUTH_EXTRAWAIT, /**< Give IAuth extra time to answer. */
157 IAUTH_UNDERNET, /**< Enable Undernet extensions. */
158 IAUTH_LAST_FLAG /**< total number of flags */
160 /** Declare a bitset structure indexed by IAuthFlag. */
161 DECLARE_FLAGSET(IAuthFlags, IAUTH_LAST_FLAG);
163 /** Describes state of an IAuth connection. */
165 struct MsgQ i_sendQ; /**< messages queued to send */
166 struct Socket i_socket; /**< main socket to iauth */
167 struct Socket i_stderr; /**< error socket for iauth */
168 struct IAuthFlags i_flags; /**< connection state/status/flags */
169 uint64_t i_recvB; /**< bytes received */
170 uint64_t i_sendB; /**< bytes sent */
171 time_t started; /**< time that this instance was started */
172 unsigned int i_recvM; /**< messages received */
173 unsigned int i_sendM; /**< messages sent */
174 unsigned int i_count; /**< characters used in i_buffer */
175 unsigned int i_errcount; /**< characters used in i_errbuf */
176 int i_debug; /**< debug level */
177 char i_buffer[BUFSIZE+1]; /**< partial unprocessed line from server */
178 char i_errbuf[BUFSIZE+1]; /**< partial unprocessed error line */
179 char *i_version; /**< iauth version string */
180 struct SLink *i_config; /**< configuration string list */
181 struct SLink *i_stats; /**< statistics string list */
182 char **i_argv; /**< argument list */
185 /** Return whether flag \a flag is set on \a iauth. */
186 #define IAuthHas(iauth, flag) ((iauth) && FlagHas(&(iauth)->i_flags, flag))
187 /** Set flag \a flag on \a iauth. */
188 #define IAuthSet(iauth, flag) FlagSet(&(iauth)->i_flags, flag)
189 /** Clear flag \a flag from \a iauth. */
190 #define IAuthClr(iauth, flag) FlagClr(&(iauth)->i_flags, flag)
191 /** Get connected flag for \a iauth. */
192 #define i_GetConnected(iauth) ((iauth) && s_fd(i_socket(iauth)) > -1)
194 /** Return socket event generator for \a iauth. */
195 #define i_socket(iauth) (&(iauth)->i_socket)
196 /** Return stderr socket for \a iauth. */
197 #define i_stderr(iauth) (&(iauth)->i_stderr)
198 /** Return outbound message queue for \a iauth. */
199 #define i_sendQ(iauth) (&(iauth)->i_sendQ)
200 /** Return debug level for \a iauth. */
201 #define i_debug(iauth) ((iauth)->i_debug)
203 /** Active instance of IAuth. */
204 static struct IAuth *iauth;
205 /** Freelist of AuthRequest structures. */
206 static struct AuthRequest *auth_freelist;
208 static void iauth_sock_callback(struct Event *ev);
209 static void iauth_stderr_callback(struct Event *ev);
210 static int sendto_iauth(struct Client *cptr, const char *format, ...);
211 static int preregister_user(struct Client *cptr);
212 typedef int (*iauth_cmd_handler)(struct IAuth *iauth, struct Client *cli,
213 int parc, char **params);
215 /** Set username for user associated with \a auth.
216 * @param[in] auth Client authorization request to work on.
217 * @return Zero if client is kept, CPTR_KILLED if client rejected.
219 static int auth_set_username(struct AuthRequest *auth)
221 struct Client *sptr = auth->client;
222 struct User *user = cli_user(sptr);
233 short digitgroups = 0;
237 if (FlagHas(&auth->flags, AR_IAUTH_USERNAME))
239 ircd_strncpy(cli_user(sptr)->username, cli_username(sptr), USERLEN);
243 /* Copy username from source to destination. Since they may be the
244 * same, and we may prefix with a '~', use a buffer character (ch)
245 * to hold the next character to copy.
247 s = IsIdented(sptr) ? cli_username(sptr) : user->username;
250 if (HasFlag(sptr, FLAG_DOID) && !IsIdented(sptr))
255 while (last && !IsCntrl(last) && rlen--)
258 *d++ = IsUserChar(last) ? last : '_';
259 last = (ch != '~') ? ch : '_';
264 /* If username is empty or just ~, reject. */
265 if ((user->username[0] == '\0')
266 || ((user->username[0] == '~') && (user->username[1] == '\0')))
267 return exit_client(sptr, sptr, &me, "USER: Bogus userid.");
269 /* Check for K- or G-line. */
270 killreason = find_kill(sptr);
272 ServerStats->is_ref++;
273 return exit_client(sptr, sptr, &me,
274 (killreason == -1 ? "K-lined" : "G-lined"));
277 if (!FlagHas(&auth->flags, AR_IAUTH_FUSERNAME))
279 /* Check for mixed case usernames, meaning probably hacked. Jon2 3-94
280 * Explanations of rules moved to where it is checked Entrope 2-06
282 s = d = user->username + (user->username[0] == '~');
291 else if (IsUpper(ch))
294 /* Accept caps as leading if we haven't seen lower case or digits yet. */
295 if ((leadcaps || pos == 0) && !lower && !digits)
298 else if (IsDigit(ch))
301 if (pos == 0 || !IsDigit(last))
304 /* If more than two groups of digits, reject. */
309 else if (ch == '-' || ch == '_' || ch == '.')
312 /* If -_. exist at start, consecutively, or more than twice, reject. */
313 if (pos == 0 || last == '-' || last == '_' || last == '.' || other > 2)
316 else /* All other punctuation is rejected. */
320 /* If mixed case, first must be capital, but no more than three;
321 * but if three capitals, they must all be leading. */
322 if (lower && upper && (!leadcaps || leadcaps > 3 ||
323 (upper > 2 && upper > leadcaps)))
325 /* If two different groups of digits, one must be either at the
327 if (digitgroups == 2 && !(IsDigit(s[0]) || IsDigit(ch)))
329 /* Must have at least one letter. */
330 if (!lower && !upper)
332 /* Final character must not be punctuation. */
340 /* If we confirmed their username, and it is what they claimed,
342 if (IsIdented(sptr) && !strcmp(cli_username(sptr), user->username))
345 ServerStats->is_ref++;
346 send_reply(sptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
347 ":Your username is invalid.");
348 send_reply(sptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
349 ":Connect with your real username, in lowercase.");
350 send_reply(sptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
351 ":If your mail address were foo@bar.com, your username "
353 return exit_client(sptr, sptr, &me, "USER: Bad username");
356 /** Check whether an authorization request is complete.
357 * This means that no flags from 0 to #AR_LAST_SCAN are set on \a auth.
358 * If #AR_IAUTH_PENDING is set, optionally go into "hurry" state. If
359 * 0 through #AR_LAST_SCAN and #AR_IAUTH_PENDING are all clear,
360 * destroy \a auth, clear the password, set the username, and register
362 * @param[in] auth Authorization request to check.
363 * @return Zero if client is kept, CPTR_KILLED if client rejected.
365 static int check_auth_finished(struct AuthRequest *auth)
367 enum AuthRequestFlag flag;
370 /* Check non-iauth registration blocking flags. */
371 for (flag = 0; flag <= AR_LAST_SCAN; ++flag)
372 if (FlagHas(&auth->flags, flag))
374 Debug((DEBUG_INFO, "Auth %p [%d] still has flag %d", auth,
375 cli_fd(auth->client), flag));
379 /* If appropriate, do preliminary assignment to connection class. */
380 if (IsUserPort(auth->client)
381 && !FlagHas(&auth->flags, AR_IAUTH_HURRY)
382 && preregister_user(auth->client))
385 /* If we have not done so, check client password. Do this as soon
386 * as possible so that iauth's challenge/response (which uses PASS
387 * for responses) is not confused with the client's password.
389 if (IsUserPort(auth->client)
390 && !FlagHas(&auth->flags, AR_PASSWORD_CHECKED))
392 struct ConfItem *aconf;
394 aconf = cli_confs(auth->client)->value.aconf;
396 && !EmptyString(aconf->passwd)
397 && strcmp(cli_passwd(auth->client), aconf->passwd))
399 ServerStats->is_ref++;
400 send_reply(auth->client, ERR_PASSWDMISMATCH);
401 return exit_client(auth->client, auth->client, &me, "Bad Password");
403 FlagSet(&auth->flags, AR_PASSWORD_CHECKED);
406 /* Check if iauth is done. */
407 if (FlagHas(&auth->flags, AR_IAUTH_PENDING))
409 /* Switch auth request to hurry-up state. */
410 if (!FlagHas(&auth->flags, AR_IAUTH_HURRY))
412 /* Set "hurry" flag in auth request. */
413 FlagSet(&auth->flags, AR_IAUTH_HURRY);
415 /* If iauth wants it, send notification. */
416 if (IAuthHas(iauth, IAUTH_UNDERNET))
417 sendto_iauth(auth->client, "H %s", get_client_class(auth->client));
419 /* If iauth wants it, give client more time. */
420 if (IAuthHas(iauth, IAUTH_EXTRAWAIT))
421 cli_firsttime(auth->client) = CurrentTime;
424 Debug((DEBUG_INFO, "Auth %p [%d] still has flag %d", auth,
425 cli_fd(auth->client), AR_IAUTH_PENDING));
429 FlagSet(&auth->flags, AR_IAUTH_HURRY);
431 if (IsUserPort(auth->client))
433 memset(cli_passwd(auth->client), 0, sizeof(cli_passwd(auth->client)));
434 res = auth_set_username(auth);
436 res = register_user(auth->client, auth->client);
441 destroy_auth_request(auth);
445 /** Verify that a hostname is valid, i.e., only contains characters
446 * valid for a hostname and that a hostname is not too long.
447 * @param host Hostname to check.
448 * @param maxlen Maximum length of hostname, not including NUL terminator.
449 * @return Non-zero if the hostname is valid.
452 auth_verify_hostname(const char *host, int maxlen)
456 /* Walk through the host name */
457 for (i = 0; host[i]; i++)
458 /* If it's not a hostname character or if it's too long, return false */
459 if (!IsHostChar(host[i]) || i >= maxlen)
462 return 1; /* it's a valid hostname */
465 /** Check whether a client already has a CONF_CLIENT configuration
468 * @return A pointer to the client's first CONF_CLIENT, or NULL if
471 static struct ConfItem *find_conf_client(struct Client *cptr)
475 for (list = cli_confs(cptr); list != NULL; list = list->next) {
476 struct ConfItem *aconf;
477 aconf = list->value.aconf;
478 if (aconf->status & CONF_CLIENT)
485 /** Assign a client to a connection class.
486 * @param[in] cptr Client to assign to a class.
487 * @return Zero if client is kept, CPTR_KILLED if rejected.
489 static int preregister_user(struct Client *cptr)
491 static time_t last_too_many1;
492 static time_t last_too_many2;
494 ircd_strncpy(cli_user(cptr)->host, cli_sockhost(cptr), HOSTLEN);
495 ircd_strncpy(cli_user(cptr)->realhost, cli_sockhost(cptr), HOSTLEN);
497 if (find_conf_client(cptr)) {
501 switch (conf_check_client(cptr))
505 case ACR_NO_AUTHORIZATION:
506 sendto_opmask_butone(0, SNO_UNAUTH, "Unauthorized connection from %s.",
507 get_client_name(cptr, HIDE_IP));
508 ++ServerStats->is_ref;
509 return exit_client(cptr, cptr, &me,
510 "No Authorization - use another server");
511 case ACR_TOO_MANY_IN_CLASS:
512 sendto_opmask_butone_ratelimited(0, SNO_TOOMANY, &last_too_many1,
513 "Too many connections in class %s for %s.",
514 get_client_class(cptr),
515 get_client_name(cptr, SHOW_IP));
516 ++ServerStats->is_ref;
517 return exit_client(cptr, cptr, &me,
518 "Sorry, your connection class is full - try "
519 "again later or try another server");
520 case ACR_TOO_MANY_FROM_IP:
521 sendto_opmask_butone_ratelimited(0, SNO_TOOMANY, &last_too_many2,
522 "Too many connections from same IP for %s.",
523 get_client_name(cptr, SHOW_IP));
524 ++ServerStats->is_ref;
525 return exit_client(cptr, cptr, &me,
526 "Too many connections from your host");
527 case ACR_ALREADY_AUTHORIZED:
528 /* Can this ever happen? */
530 ++ServerStats->is_ref;
531 IPcheck_connect_fail(cptr);
532 return exit_client(cptr, cptr, &me, "Unknown error -- Try again");
537 /** Send the ident server a query giving "theirport , ourport". The
538 * write is only attempted *once* so it is deemed to be a fail if the
539 * entire write doesn't write all the data given. This shouldn't be a
540 * problem since the socket should have a write buffer far greater
541 * than this message to store it in should problems arise. -avalon
542 * @param[in] auth The request to send.
544 static void send_auth_query(struct AuthRequest* auth)
551 ircd_snprintf(0, authbuf, sizeof(authbuf), "%hu , %hu\r\n",
552 auth->port, auth->local.port);
554 if (IO_SUCCESS != os_send_nonb(s_fd(&auth->socket), authbuf, strlen(authbuf), &count)) {
555 close(s_fd(&auth->socket));
556 socket_del(&auth->socket);
557 s_fd(&auth->socket) = -1;
558 ++ServerStats->is_abad;
559 if (IsUserPort(auth->client))
560 sendheader(auth->client, REPORT_FAIL_ID);
561 FlagClr(&auth->flags, AR_AUTH_PENDING);
562 check_auth_finished(auth);
566 /** Enum used to index ident reply fields in a human-readable way. */
567 enum IdentReplyFields {
575 /** Parse an ident reply line and extract the userid from it.
576 * @param[in] reply The ident reply line.
577 * @return The userid, or NULL on parse failure.
579 static char* check_ident_reply(char* reply)
583 char* vector[USERID_TOKEN_COUNT];
584 int count = token_vector(reply, ':', vector, USERID_TOKEN_COUNT);
586 if (USERID_TOKEN_COUNT != count)
589 * second token is the reply type
591 token = vector[IDENT_REPLY_TYPE];
592 if (EmptyString(token))
595 while (IsSpace(*token))
598 if (0 != strncmp(token, "USERID", 6))
602 * third token is the os type
604 token = vector[IDENT_OS_TYPE];
605 if (EmptyString(token))
607 while (IsSpace(*token))
611 * Unless "OTHER" is specified as the operating system
612 * type, the server is expected to return the "normal"
613 * user identification of the owner of this connection.
614 * "Normal" in this context may be taken to mean a string
615 * of characters which uniquely identifies the connection
616 * owner such as a user identifier assigned by the system
617 * administrator and used by such user as a mail
618 * identifier, or as the "user" part of a user/password
619 * pair used to gain access to system resources. When an
620 * operating system is specified (e.g., anything but
621 * "OTHER"), the user identifier is expected to be in a
622 * more or less immediately useful form - e.g., something
623 * that could be used as an argument to "finger" or as a
626 if (0 == strncmp(token, "OTHER", 5))
629 * fourth token is the username
631 token = vector[IDENT_INFO];
632 if (EmptyString(token))
634 while (IsSpace(*token))
637 * look for the end of the username, terminators are '\0, @, <SPACE>, :'
639 for (end = token; *end; ++end) {
640 if (IsSpace(*end) || '@' == *end || ':' == *end)
647 /** Read the reply (if any) from the ident server we connected to. We
648 * only give it one shot, if the reply isn't good the first time fail
649 * the authentication entirely. --Bleep
650 * @param[in] auth The request to read.
652 static void read_auth_reply(struct AuthRequest* auth)
657 * rfc1453 sez we MUST accept 512 bytes
659 char buf[BUFSIZE + 1];
662 assert(0 != auth->client);
663 assert(auth == cli_auth(auth->client));
665 if (IO_SUCCESS == os_recv_nonb(s_fd(&auth->socket), buf, BUFSIZE, &len)) {
667 Debug((DEBUG_INFO, "Auth %p [%d] reply: %s", auth, cli_fd(auth->client), buf));
668 username = check_ident_reply(buf);
669 Debug((DEBUG_INFO, "Username: %s", username));
672 Debug((DEBUG_INFO, "Deleting auth [%d] socket %p", auth, cli_fd(auth->client)));
673 close(s_fd(&auth->socket));
674 socket_del(&auth->socket);
675 s_fd(&auth->socket) = -1;
677 if (EmptyString(username)) {
678 if (IsUserPort(auth->client))
679 sendheader(auth->client, REPORT_FAIL_ID);
680 ++ServerStats->is_abad;
682 if (IsUserPort(auth->client))
683 sendheader(auth->client, REPORT_FIN_ID);
684 ++ServerStats->is_asuc;
685 if (!FlagHas(&auth->flags, AR_IAUTH_USERNAME)) {
686 ircd_strncpy(cli_username(auth->client), username, USERLEN);
687 SetGotId(auth->client);
689 if (IAuthHas(iauth, IAUTH_UNDERNET))
690 sendto_iauth(auth->client, "u %s", username);
693 FlagClr(&auth->flags, AR_AUTH_PENDING);
694 check_auth_finished(auth);
697 /** Handle socket I/O activity.
698 * @param[in] ev A socket event whos associated data is the active
699 * struct AuthRequest.
701 static void auth_sock_callback(struct Event* ev)
703 struct AuthRequest* auth;
705 assert(0 != ev_socket(ev));
706 assert(0 != s_data(ev_socket(ev)));
708 auth = (struct AuthRequest*) s_data(ev_socket(ev));
710 switch (ev_type(ev)) {
711 case ET_DESTROY: /* being destroyed */
714 case ET_CONNECT: /* socket connection completed */
715 Debug((DEBUG_INFO, "Connection completed for auth %p [%d]; sending query",
716 auth, cli_fd(auth->client)));
717 socket_state(&auth->socket, SS_CONNECTED);
718 send_auth_query(auth);
721 case ET_READ: /* socket is readable */
722 case ET_EOF: /* end of file on socket */
723 case ET_ERROR: /* error on socket */
724 Debug((DEBUG_INFO, "Auth socket %p [%p] readable", auth, ev_socket(ev)));
725 read_auth_reply(auth);
729 assert(0 && "Unrecognized event in auth_socket_callback().");
734 /** Stop an auth request completely.
735 * @param[in] auth The struct AuthRequest to cancel.
737 void destroy_auth_request(struct AuthRequest* auth)
739 Debug((DEBUG_INFO, "Deleting auth request for %p", auth->client));
741 if (FlagHas(&auth->flags, AR_DNS_PENDING)) {
742 delete_resolver_queries(auth);
745 if (-1 < s_fd(&auth->socket)) {
746 close(s_fd(&auth->socket));
747 socket_del(&auth->socket);
748 s_fd(&auth->socket) = -1;
751 if (t_active(&auth->timeout))
752 timer_del(&auth->timeout);
754 cli_auth(auth->client) = NULL;
755 auth->next = auth_freelist;
756 auth_freelist = auth;
759 /** Handle a 'ping' (authorization) timeout for a client.
760 * @param[in] cptr The client whose session authorization has timed out.
761 * @return Zero if client is kept, CPTR_KILLED if client rejected.
763 int auth_ping_timeout(struct Client *cptr)
765 struct AuthRequest *auth;
766 enum AuthRequestFlag flag;
768 auth = cli_auth(cptr);
770 /* Check whether the auth request is gone (more likely, it never
771 * existed, as in an outbound server connection). */
773 return exit_client_msg(cptr, cptr, &me, "Registration Timeout");
775 /* Check for a user-controlled timeout. */
776 for (flag = 0; flag <= AR_LAST_SCAN; ++flag) {
777 if (FlagHas(&auth->flags, flag)) {
778 /* Display message if they have sent a NICK and a USER but no
781 if (*(cli_name(cptr)) && cli_user(cptr) && *(cli_user(cptr))->username) {
782 send_reply(cptr, SND_EXPLICIT | ERR_BADPING,
783 ":Your client may not be compatible with this server.");
784 send_reply(cptr, SND_EXPLICIT | ERR_BADPING,
785 ":Compatible clients are available at %s",
786 feature_str(FEAT_URL_CLIENTS));
788 return exit_client_msg(cptr, cptr, &me, "Registration Timeout");
792 /* Check for iauth timeout. */
793 if (FlagHas(&auth->flags, AR_IAUTH_PENDING)) {
794 if (IAuthHas(iauth, IAUTH_REQUIRED)) {
795 sendheader(cptr, REPORT_FAIL_IAUTH);
796 return exit_client_msg(cptr, cptr, &me, "Authorization Timeout");
798 sendto_iauth(cptr, "T");
799 FlagClr(&auth->flags, AR_IAUTH_PENDING);
800 return check_auth_finished(auth);
803 assert(0 && "Unexpectedly reached end of auth_ping_timeout()");
807 /** Timeout a given auth request.
808 * @param[in] ev A timer event whose associated data is the expired
809 * struct AuthRequest.
811 static void auth_timeout_callback(struct Event* ev)
813 struct AuthRequest* auth;
815 assert(0 != ev_timer(ev));
816 assert(0 != t_data(ev_timer(ev)));
818 auth = (struct AuthRequest*) t_data(ev_timer(ev));
820 if (ev_type(ev) == ET_EXPIRE) {
821 /* Report the timeout in the log. */
822 log_write(LS_RESOLVER, L_INFO, 0, "Registration timeout %s",
823 get_client_name(auth->client, HIDE_IP));
825 /* Notify client if ident lookup failed. */
826 if (FlagHas(&auth->flags, AR_AUTH_PENDING)) {
827 FlagClr(&auth->flags, AR_AUTH_PENDING);
828 if (IsUserPort(auth->client))
829 sendheader(auth->client, REPORT_FAIL_ID);
832 /* Likewise if dns lookup failed. */
833 if (FlagHas(&auth->flags, AR_DNS_PENDING)) {
834 FlagClr(&auth->flags, AR_DNS_PENDING);
835 delete_resolver_queries(auth);
836 if (IsUserPort(auth->client))
837 sendheader(auth->client, REPORT_FAIL_DNS);
840 /* Try to register the client. */
841 check_auth_finished(auth);
845 /** Handle a complete DNS lookup. Send the client on it's way to a
846 * connection completion, regardless of success or failure -- unless
847 * there was a mismatch and KILL_IPMISMATCH is set.
848 * @param[in] vptr The pending struct AuthRequest.
849 * @param[in] addr IP address being resolved.
850 * @param[in] h_name Resolved name, or NULL if lookup failed.
852 static void auth_dns_callback(void* vptr, const struct irc_in_addr *addr, const char *h_name)
854 struct AuthRequest* auth = (struct AuthRequest*) vptr;
857 FlagClr(&auth->flags, AR_DNS_PENDING);
859 /* DNS entry was missing for the IP. */
860 if (IsUserPort(auth->client))
861 sendheader(auth->client, REPORT_FAIL_DNS);
862 sendto_iauth(auth->client, "d");
863 } else if (!irc_in_addr_valid(addr)
864 || (irc_in_addr_cmp(&cli_ip(auth->client), addr)
865 && irc_in_addr_cmp(&auth->original, addr))) {
866 /* IP for hostname did not match client's IP. */
867 sendto_opmask_butone(0, SNO_IPMISMATCH, "IP# Mismatch: %s != %s[%s]",
868 cli_sock_ip(auth->client), h_name,
870 if (IsUserPort(auth->client))
871 sendheader(auth->client, REPORT_IP_MISMATCH);
872 if (feature_bool(FEAT_KILL_IPMISMATCH)) {
873 exit_client(auth->client, auth->client, &me, "IP mismatch");
876 } else if (!auth_verify_hostname(h_name, HOSTLEN)) {
877 /* Hostname did not look valid. */
878 if (IsUserPort(auth->client))
879 sendheader(auth->client, REPORT_INVAL_DNS);
880 sendto_iauth(auth->client, "d");
882 /* Hostname and mappings checked out. */
883 if (IsUserPort(auth->client))
884 sendheader(auth->client, REPORT_FIN_DNS);
885 ircd_strncpy(cli_sockhost(auth->client), h_name, HOSTLEN);
886 sendto_iauth(auth->client, "N %s", h_name);
888 check_auth_finished(auth);
891 /** Flag the client to show an attempt to contact the ident server on
892 * the client's host. Should the connect or any later phase of the
893 * identifying process fail, it is aborted and the user is given a
894 * username of "unknown".
895 * @param[in] auth The request for which to start the ident lookup.
897 static void start_auth_query(struct AuthRequest* auth)
899 struct irc_sockaddr remote_addr;
900 struct irc_sockaddr local_addr;
905 assert(0 != auth->client);
908 * get the local address of the client and bind to that to
909 * make the auth request. This used to be done only for
910 * ifdef VIRTUAL_HOST, but needs to be done for all clients
911 * since the ident request must originate from that same address--
912 * and machines with multiple IP addresses are common now
914 memcpy(&local_addr, &auth->local, sizeof(local_addr));
916 memcpy(&remote_addr.addr, &cli_ip(auth->client), sizeof(remote_addr.addr));
917 remote_addr.port = 113;
918 fd = os_socket(&local_addr, SOCK_STREAM, "auth query", 0);
920 ++ServerStats->is_abad;
921 if (IsUserPort(auth->client))
922 sendheader(auth->client, REPORT_FAIL_ID);
925 if (IsUserPort(auth->client))
926 sendheader(auth->client, REPORT_DO_ID);
928 if ((result = os_connect_nonb(fd, &remote_addr)) == IO_FAILURE ||
929 !socket_add(&auth->socket, auth_sock_callback, (void*) auth,
930 result == IO_SUCCESS ? SS_CONNECTED : SS_CONNECTING,
931 SOCK_EVENT_READABLE, fd)) {
932 ++ServerStats->is_abad;
933 if (IsUserPort(auth->client))
934 sendheader(auth->client, REPORT_FAIL_ID);
939 FlagSet(&auth->flags, AR_AUTH_PENDING);
940 if (result == IO_SUCCESS)
941 send_auth_query(auth);
944 /** Initiate DNS lookup for a client.
945 * @param[in] auth The auth request for which to start the DNS lookup.
947 static void start_dns_query(struct AuthRequest *auth)
949 if (feature_bool(FEAT_NODNS)) {
950 sendto_iauth(auth->client, "d");
954 if (irc_in_addr_is_loopback(&cli_ip(auth->client))) {
955 strcpy(cli_sockhost(auth->client), cli_name(&me));
956 sendto_iauth(auth->client, "N %s", cli_sockhost(auth->client));
960 if (IsUserPort(auth->client))
961 sendheader(auth->client, REPORT_DO_DNS);
963 FlagSet(&auth->flags, AR_DNS_PENDING);
964 gethost_byaddr(&cli_ip(auth->client), auth_dns_callback, auth);
967 /** Initiate IAuth check for a client.
968 * @param[in] auth The auth request for which to star the IAuth check.
970 static void start_iauth_query(struct AuthRequest *auth)
972 FlagSet(&auth->flags, AR_IAUTH_PENDING);
973 if (!sendto_iauth(auth->client, "C %s %hu %s %hu",
974 cli_sock_ip(auth->client), auth->port,
975 ircd_ntoa(&auth->local.addr), auth->local.port))
976 FlagClr(&auth->flags, AR_IAUTH_PENDING);
979 /** Starts auth (identd) and dns queries for a client.
980 * @param[in] client The client for which to start queries.
982 void start_auth(struct Client* client)
984 struct irc_sockaddr remote;
985 struct AuthRequest* auth;
988 Debug((DEBUG_INFO, "Beginning auth request on client %p", client));
990 /* Register with event handlers. */
991 cli_lasttime(client) = CurrentTime;
992 cli_since(client) = CurrentTime;
993 if (cli_fd(client) > HighestFd)
994 HighestFd = cli_fd(client);
995 LocalClientArray[cli_fd(client)] = client;
996 socket_events(&(cli_socket(client)), SOCK_ACTION_SET | SOCK_EVENT_READABLE);
998 /* Allocate the AuthRequest. */
999 auth = auth_freelist;
1001 auth_freelist = auth->next;
1003 auth = MyMalloc(sizeof(*auth));
1005 memset(auth, 0, sizeof(*auth));
1006 auth->client = client;
1007 cli_auth(client) = auth;
1008 s_fd(&auth->socket) = -1;
1009 timer_add(timer_init(&auth->timeout), auth_timeout_callback, (void*) auth,
1010 TT_RELATIVE, feature_int(FEAT_AUTH_TIMEOUT));
1012 /* Try to get socket endpoint addresses. */
1013 if (!os_get_sockname(cli_fd(client), &auth->local)
1014 || !os_get_peername(cli_fd(client), &remote)) {
1015 ++ServerStats->is_abad;
1016 if (IsUserPort(auth->client))
1017 sendheader(auth->client, REPORT_FAIL_ID);
1018 exit_client(auth->client, auth->client, &me, "Socket local/peer lookup failed");
1021 auth->port = remote.port;
1023 /* Try to start DNS lookup. */
1024 start_dns_query(auth);
1026 /* Try to start ident lookup. */
1027 start_auth_query(auth);
1029 /* Set required client inputs for users. */
1030 if (IsUserPort(client)) {
1031 cli_user(client) = make_user(client);
1032 cli_user(client)->server = &me;
1033 FlagSet(&auth->flags, AR_NEEDS_USER);
1034 FlagSet(&auth->flags, AR_NEEDS_NICK);
1036 /* Try to start iauth lookup. */
1037 start_iauth_query(auth);
1040 /* Add client to GlobalClientList. */
1041 add_client_to_list(client);
1043 /* Check which auth events remain pending. */
1044 check_auth_finished(auth);
1047 /** Mark that a user has PONGed while unregistered.
1048 * @param[in] auth Authorization request for client.
1049 * @param[in] cookie PONG cookie value sent by client.
1050 * @return Zero if client should be kept, CPTR_KILLED if rejected.
1052 int auth_set_pong(struct AuthRequest *auth, unsigned int cookie)
1054 assert(auth != NULL);
1055 if (!FlagHas(&auth->flags, AR_NEEDS_PONG))
1057 if (cookie != auth->cookie)
1059 send_reply(auth->client, SND_EXPLICIT | ERR_BADPING,
1060 ":To connect, type /QUOTE PONG %u", auth->cookie);
1063 cli_lasttime(auth->client) = CurrentTime;
1064 FlagClr(&auth->flags, AR_NEEDS_PONG);
1065 return check_auth_finished(auth);
1068 /** Record a user's claimed username and userinfo.
1069 * @param[in] auth Authorization request for client.
1070 * @param[in] username Client's asserted username.
1071 * @param[in] hostname Third argument of USER command (client's
1072 * hostname, per RFC 1459).
1073 * @param[in] servername Fourth argument of USER command (server's
1074 * name, per RFC 1459).
1075 * @param[in] userinfo Client's asserted self-description.
1076 * @return Zero if client should be kept, CPTR_KILLED if rejected.
1078 int auth_set_user(struct AuthRequest *auth, const char *username, const char *hostname, const char *servername, const char *userinfo)
1080 struct Client *cptr;
1082 assert(auth != NULL);
1083 if (FlagHas(&auth->flags, AR_IAUTH_HURRY))
1085 FlagClr(&auth->flags, AR_NEEDS_USER);
1086 cptr = auth->client;
1087 ircd_strncpy(cli_info(cptr), userinfo, REALLEN);
1088 ircd_strncpy(cli_user(cptr)->username, username, USERLEN);
1089 ircd_strncpy(cli_user(cptr)->host, cli_sockhost(cptr), HOSTLEN);
1090 if (IAuthHas(iauth, IAUTH_UNDERNET))
1091 sendto_iauth(cptr, "U %s %s %s :%s", username, hostname, servername, userinfo);
1092 else if (IAuthHas(iauth, IAUTH_ADDLINFO))
1093 sendto_iauth(cptr, "U %s", username);
1094 return check_auth_finished(auth);
1097 /** Handle authorization-related aspects of initial nickname selection.
1098 * This is called after verifying that the nickname is available.
1099 * @param[in] auth Authorization request for client.
1100 * @param[in] nickname Client's requested nickname.
1101 * @return Zero if client should be kept, CPTR_KILLED if rejected.
1103 int auth_set_nick(struct AuthRequest *auth, const char *nickname)
1105 assert(auth != NULL);
1106 FlagClr(&auth->flags, AR_NEEDS_NICK);
1108 * If the client hasn't gotten a cookie-ping yet,
1109 * choose a cookie and send it. -record!jegelhof@cloud9.net
1111 if (!auth->cookie) {
1113 auth->cookie = ircrandom();
1114 } while (!auth->cookie);
1115 sendrawto_one(auth->client, "PING :%u", auth->cookie);
1116 FlagSet(&auth->flags, AR_NEEDS_PONG);
1118 if (IAuthHas(iauth, IAUTH_UNDERNET))
1119 sendto_iauth(auth->client, "n %s", nickname);
1120 return check_auth_finished(auth);
1123 /** Record a user's password.
1124 * @param[in] auth Authorization request for client.
1125 * @param[in] password Client's password.
1126 * @return Zero if client should be kept, CPTR_KILLED if rejected.
1128 int auth_set_password(struct AuthRequest *auth, const char *password)
1130 assert(auth != NULL);
1131 if (IAuthHas(iauth, IAUTH_ADDLINFO))
1132 sendto_iauth(auth->client, "P :%s", password);
1136 /** Send exit notification for \a cptr to iauth.
1137 * @param[in] cptr Client who is exiting.
1139 void auth_send_exit(struct Client *cptr)
1141 sendto_iauth(cptr, "D");
1144 /** Forward an XREPLY on to iauth.
1145 * @param[in] sptr Source of the XREPLY.
1146 * @param[in] routing Routing information for the original XQUERY.
1147 * @param[in] reply Contents of the reply.
1149 void auth_send_xreply(struct Client *sptr, const char *routing,
1152 sendto_iauth(NULL, "X %#C %s :%s", sptr, routing, reply);
1155 /** Mark that a user has started capabilities negotiation.
1156 * This blocks authorization until auth_cap_done() is called.
1157 * @param[in] auth Authorization request for client.
1158 * @return Zero if client should be kept, CPTR_KILLED if rejected.
1160 int auth_cap_start(struct AuthRequest *auth)
1162 assert(auth != NULL);
1163 FlagSet(&auth->flags, AR_CAP_PENDING);
1167 /** Mark that a user has completed capabilities negotiation.
1168 * This unblocks authorization if auth_cap_start() was called.
1169 * @param[in] auth Authorization request for client.
1170 * @return Zero if client should be kept, CPTR_KILLED if rejected.
1172 int auth_cap_done(struct AuthRequest *auth)
1174 assert(auth != NULL);
1175 FlagClr(&auth->flags, AR_CAP_PENDING);
1176 return check_auth_finished(auth);
1179 /** Attempt to spawn the process for an IAuth instance.
1180 * @param[in] iauth IAuth descriptor.
1181 * @param[in] automatic If non-zero, apply sanity checks against
1182 * excessive automatic restarts.
1183 * @return 0 on success, non-zero on failure.
1185 int iauth_do_spawn(struct IAuth *iauth, int automatic)
1192 if (automatic && CurrentTime - iauth->started < 5)
1194 sendto_opmask_butone(NULL, SNO_AUTH, "IAuth crashed fast, leaving it dead.");
1198 /* Record time we tried to spawn the iauth process. */
1199 iauth->started = CurrentTime;
1201 /* Attempt to allocate a pair of sockets. */
1202 res = os_socketpair(s_io);
1205 Debug((DEBUG_INFO, "Unable to create IAuth socketpair: %s", strerror(res)));
1209 /* Mark the parent's side of the pair (element 0) as non-blocking. */
1210 res = os_set_nonblocking(s_io[0]);
1213 Debug((DEBUG_INFO, "Unable to make IAuth socket non-blocking: %s", strerror(res)));
1219 /* Initialize the socket structure to talk to the child. */
1220 res = socket_add(i_socket(iauth), iauth_sock_callback, iauth,
1221 SS_CONNECTED, SOCK_EVENT_READABLE, s_io[0]);
1224 Debug((DEBUG_INFO, "Unable to register IAuth socket: %s", strerror(res)));
1230 /* Allocate another pair for stderr. */
1231 res = os_socketpair(s_err);
1234 Debug((DEBUG_INFO, "Unable to create IAuth stderr: %s", strerror(res)));
1235 socket_del(i_socket(iauth));
1241 /* Mark parent side of this pair non-blocking, too. */
1242 res = os_set_nonblocking(s_err[0]);
1245 Debug((DEBUG_INFO, "Unable to make IAuth stderr non-blocking: %s", strerror(res)));
1248 socket_del(i_socket(iauth));
1254 /* And set up i_stderr(iauth). */
1255 res = socket_add(i_stderr(iauth), iauth_stderr_callback, iauth,
1256 SS_CONNECTED, SOCK_EVENT_READABLE, s_err[0]);
1259 Debug((DEBUG_INFO, "Unable to register IAuth stderr: %s", strerror(res)));
1262 socket_del(i_socket(iauth));
1268 /* Attempt to fork a child process. */
1271 /* Error forking the child, still in parent. */
1273 Debug((DEBUG_INFO, "Unable to fork IAuth child: %s", strerror(res)));
1274 socket_del(i_stderr(iauth));
1277 socket_del(i_socket(iauth));
1284 /* We are the parent process. Close the child's sockets. */
1287 /* Send our server name (supposedly for proxy checking purposes)
1288 * and maximum number of connections (for allocation hints).
1289 * Need to use conf_get_local() since &me may not be fully
1290 * initialized the first time we run.
1292 sendto_iauth(NULL, "M %s %d", conf_get_local()->name, MAXCONNECTIONS);
1293 /* Indicate success (until the child dies). */
1297 /* We are the child process.
1298 * Duplicate our end of the socket to stdin, stdout and stderr.
1299 * Then close all the higher-numbered FDs and exec the process.
1301 if (dup2(s_io[1], 0) == 0
1302 && dup2(s_io[1], 1) == 1
1303 && dup2(s_err[1], 2) == 2) {
1304 close_connections(0);
1305 execvp(iauth->i_argv[0], iauth->i_argv);
1308 /* If we got here, something was seriously wrong. */
1312 /** See if an %IAuth program must be spawned.
1313 * If a process is already running with the specified options, keep it.
1314 * Otherwise spawn a new child process to perform the %IAuth function.
1315 * @param[in] argc Number of parameters to use when starting process.
1316 * @param[in] argv Array of parameters to start process.
1317 * @return 0 on failure, 1 on new process, 2 on reuse of existing process.
1319 int auth_spawn(int argc, char *argv[])
1326 /* Check that incoming arguments all match pre-existing arguments. */
1327 for (ii = 0; same && (ii < argc); ++ii) {
1328 if (NULL == iauth->i_argv[ii]
1329 || 0 != strcmp(iauth->i_argv[ii], argv[ii]))
1332 /* Check that we have no more pre-existing arguments. */
1333 if (same && iauth->i_argv[ii])
1335 /* If they are the same and still connected, clear the "closing" flag and exit. */
1336 if (same && i_GetConnected(iauth)) {
1337 Debug((DEBUG_INFO, "Reusing existing IAuth process"));
1338 IAuthClr(iauth, IAUTH_CLOSING);
1341 auth_close_unused();
1344 /* Need to initialize a new connection. */
1345 iauth = MyCalloc(1, sizeof(*iauth));
1346 msgq_init(i_sendQ(iauth));
1347 /* Populate iauth's argv array. */
1348 iauth->i_argv = MyCalloc(argc + 1, sizeof(iauth->i_argv[0]));
1349 for (ii = 0; ii < argc; ++ii)
1350 DupString(iauth->i_argv[ii], argv[ii]);
1351 iauth->i_argv[ii] = NULL;
1352 /* Try to spawn it, and handle the results. */
1353 if (iauth_do_spawn(iauth, 0))
1355 IAuthClr(iauth, IAUTH_CLOSING);
1359 /** Mark all %IAuth connections as closing. */
1360 void auth_mark_closing(void)
1363 IAuthSet(iauth, IAUTH_CLOSING);
1366 /** Complete disconnection of an %IAuth connection.
1367 * @param[in] iauth %Connection to fully close.
1369 static void iauth_disconnect(struct IAuth *iauth)
1374 /* Close main socket. */
1375 if (s_fd(i_socket(iauth)) != -1) {
1376 close(s_fd(i_socket(iauth)));
1377 socket_del(i_socket(iauth));
1378 s_fd(i_socket(iauth)) = -1;
1381 /* Close error socket. */
1382 if (s_fd(i_stderr(iauth)) != -1) {
1383 close(s_fd(i_stderr(iauth)));
1384 socket_del(i_stderr(iauth));
1385 s_fd(i_stderr(iauth)) = -1;
1389 /** Close all %IAuth connections marked as closing. */
1390 void auth_close_unused(void)
1392 if (IAuthHas(iauth, IAUTH_CLOSING)) {
1394 iauth_disconnect(iauth);
1395 if (iauth->i_argv) {
1396 for (ii = 0; iauth->i_argv[ii]; ++ii)
1397 MyFree(iauth->i_argv[ii]);
1398 MyFree(iauth->i_argv);
1404 /** Send queued output to \a iauth.
1405 * @param[in] iauth Writable connection with queued data.
1407 static void iauth_write(struct IAuth *iauth)
1409 unsigned int bytes_tried, bytes_sent;
1412 if (IAuthHas(iauth, IAUTH_BLOCKED))
1414 while (MsgQLength(i_sendQ(iauth)) > 0) {
1415 iores = os_sendv_nonb(s_fd(i_socket(iauth)), i_sendQ(iauth), &bytes_tried, &bytes_sent);
1418 msgq_delete(i_sendQ(iauth), bytes_sent);
1419 iauth->i_sendB += bytes_sent;
1420 if (bytes_tried == bytes_sent)
1422 /* If bytes_sent < bytes_tried, fall through to IO_BLOCKED. */
1424 IAuthSet(iauth, IAUTH_BLOCKED);
1425 socket_events(i_socket(iauth), SOCK_ACTION_ADD | SOCK_EVENT_WRITABLE);
1428 iauth_disconnect(iauth);
1432 /* We were able to flush all events, so remove notification. */
1433 socket_events(i_socket(iauth), SOCK_ACTION_DEL | SOCK_EVENT_WRITABLE);
1436 /** Send a message to iauth.
1437 * @param[in] cptr Optional client context for message.
1438 * @param[in] format Format string for message.
1439 * @return Non-zero on successful send or buffering, zero on failure.
1441 static int sendto_iauth(struct Client *cptr, const char *format, ...)
1446 /* Do not send requests when we have no iauth. */
1447 if (!i_GetConnected(iauth))
1449 /* Do not send for clients in the NORMAL state. */
1451 && (format[0] != 'D')
1452 && (!cli_auth(cptr) || !FlagHas(&cli_auth(cptr)->flags, AR_IAUTH_PENDING)))
1455 /* Build the message buffer. */
1456 vd.vd_format = format;
1457 va_start(vd.vd_args, format);
1459 mb = msgq_make(NULL, "-1 %v", &vd);
1461 mb = msgq_make(NULL, "%d %v", cli_fd(cptr), &vd);
1464 /* Tack it onto the iauth sendq and try to write it. */
1466 msgq_add(i_sendQ(iauth), mb, 0);
1472 /** Send text to interested operators (SNO_AUTH server notice).
1473 * @param[in] iauth Active IAuth session.
1474 * @param[in] cli Client referenced by command.
1475 * @param[in] parc Number of parameters (1).
1476 * @param[in] params Text to send.
1479 static int iauth_cmd_snotice(struct IAuth *iauth, struct Client *cli,
1480 int parc, char **params)
1482 sendto_opmask_butone(NULL, SNO_AUTH, "%s", params[0]);
1486 /** Set the debug level for the session.
1487 * @param[in] iauth Active IAuth session.
1488 * @param[in] cli Client referenced by command.
1489 * @param[in] parc Number of parameters (1).
1490 * @param[in] params String starting with an integer.
1493 static int iauth_cmd_debuglevel(struct IAuth *iauth, struct Client *cli,
1494 int parc, char **params)
1498 new_level = parc > 0 ? atoi(params[0]) : 0;
1499 if (i_debug(iauth) > 0 || new_level > 0) {
1500 /* The "ia_dbg" name is borrowed from (IRCnet) ircd. */
1501 sendto_opmask_butone(NULL, SNO_AUTH, "ia_dbg = %d", new_level);
1503 i_debug(iauth) = new_level;
1507 /** Set policy options for the session.
1508 * Old policy is forgotten, and any of the following characters in \a
1509 * params enable the corresponding policy:
1510 * \li A IAUTH_ADDLINFO
1511 * \li R IAUTH_REQUIRED
1512 * \li T IAUTH_TIMEOUT
1513 * \li W IAUTH_EXTRAWAIT
1514 * \li U IAUTH_UNDERNET
1516 * @param[in] iauth Active IAuth session.
1517 * @param[in] cli Client referenced by command.
1518 * @param[in] parc Number of parameters (1).
1519 * @param[in] params Zero or more policy options.
1522 static int iauth_cmd_policy(struct IAuth *iauth, struct Client *cli,
1523 int parc, char **params)
1525 enum IAuthFlag flag;
1528 /* Erase old policy first. */
1529 for (flag = IAUTH_FIRST_OPTION; flag < IAUTH_LAST_FLAG; ++flag)
1530 IAuthClr(iauth, flag);
1532 if (parc > 0) /* only try to parse if we were given a policy string */
1533 /* Parse new policy set. */
1534 for (p = params[0]; *p; p++) switch (*p) {
1535 case 'A': IAuthSet(iauth, IAUTH_ADDLINFO); break;
1536 case 'R': IAuthSet(iauth, IAUTH_REQUIRED); break;
1537 case 'T': IAuthSet(iauth, IAUTH_TIMEOUT); break;
1538 case 'W': IAuthSet(iauth, IAUTH_EXTRAWAIT); break;
1539 case 'U': IAuthSet(iauth, IAUTH_UNDERNET); break;
1542 /* Optionally notify operators. */
1543 if (i_debug(iauth) > 0)
1544 sendto_opmask_butone(NULL, SNO_AUTH, "iauth options: %s", params[0]);
1548 /** Set the iauth program version number.
1549 * @param[in] iauth Active IAuth session.
1550 * @param[in] cli Client referenced by command.
1551 * @param[in] parc Number of parameters (1).
1552 * @param[in] params Version number or name.
1555 static int iauth_cmd_version(struct IAuth *iauth, struct Client *cli,
1556 int parc, char **params)
1558 MyFree(iauth->i_version);
1559 DupString(iauth->i_version, parc > 0 ? params[0] : "<NONE>");
1560 sendto_opmask_butone(NULL, SNO_AUTH, "iauth version %s running.",
1565 /** Paste a parameter list together into a single string.
1566 * @param[in] parc Number of parameters.
1567 * @param[in] params Parameter list to paste together.
1568 * @return Pasted parameter list.
1570 static char *paste_params(int parc, char **params)
1573 int len = 0, lengths[MAXPARA], i;
1575 /* Compute the length... */
1576 for (i = 0; i < parc; i++)
1577 len += lengths[i] = strlen(params[i]);
1579 /* Allocate memory, accounting for string lengths, spaces (parc - 1), a
1580 * sentinel, and the trailing \0
1582 str = MyMalloc(len + parc + 1);
1584 /* Build the pasted string */
1585 for (tmp = str, i = 0; i < parc; i++) {
1586 if (i) /* add space separator... */
1588 if (i == parc - 1) /* add colon sentinel */
1591 /* Copy string component... */
1592 memcpy(tmp, params[i], lengths[i]);
1593 tmp += lengths[i]; /* move to end of string */
1596 /* terminate the string... */
1599 return str; /* return the pasted string */
1602 /** Clear cached iauth configuration information.
1603 * @param[in] iauth Active IAuth session.
1604 * @param[in] cli Client referenced by command.
1605 * @param[in] parc Number of parameters (0).
1606 * @param[in] params Parameter list (ignored).
1609 static int iauth_cmd_newconfig(struct IAuth *iauth, struct Client *cli,
1610 int parc, char **params)
1615 head = iauth->i_config;
1616 iauth->i_config = NULL;
1617 for (; head; head = next) {
1619 MyFree(head->value.cp);
1622 sendto_opmask_butone(NULL, SNO_AUTH, "New iauth configuration.");
1626 /** Append iauth configuration information.
1627 * @param[in] iauth Active IAuth session.
1628 * @param[in] cli Client referenced by command.
1629 * @param[in] parc Number of parameters.
1630 * @param[in] params Description of configuration element.
1633 static int iauth_cmd_config(struct IAuth *iauth, struct Client *cli,
1634 int parc, char **params)
1638 if (iauth->i_config) {
1639 for (node = iauth->i_config; node->next; node = node->next) ;
1640 node = node->next = make_link();
1642 node = iauth->i_config = make_link();
1644 node->value.cp = paste_params(parc, params);
1645 node->next = 0; /* must be explicitly cleared */
1649 /** Clear cached iauth configuration information.
1650 * @param[in] iauth Active IAuth session.
1651 * @param[in] cli Client referenced by command.
1652 * @param[in] parc Number of parameters (0).
1653 * @param[in] params Parameter list (ignored).
1656 static int iauth_cmd_newstats(struct IAuth *iauth, struct Client *cli,
1657 int parc, char **params)
1662 head = iauth->i_stats;
1663 iauth->i_stats = NULL;
1664 for (; head; head = next) {
1666 MyFree(head->value.cp);
1669 sendto_opmask_butone(NULL, SNO_AUTH, "New iauth statistics.");
1673 /** Append iauth statistics information.
1674 * @param[in] iauth Active IAuth session.
1675 * @param[in] cli Client referenced by command.
1676 * @param[in] parc Number of parameters.
1677 * @param[in] params Statistics element.
1680 static int iauth_cmd_stats(struct IAuth *iauth, struct Client *cli,
1681 int parc, char **params)
1684 if (iauth->i_stats) {
1685 for (node = iauth->i_stats; node->next; node = node->next) ;
1686 node = node->next = make_link();
1688 node = iauth->i_stats = make_link();
1690 node->value.cp = paste_params(parc, params);
1691 node->next = 0; /* must be explicitly cleared */
1695 /** Set client's username to a trusted string even if it breaks the rules.
1696 * @param[in] iauth Active IAuth session.
1697 * @param[in] cli Client referenced by command.
1698 * @param[in] parc Number of parameters (1).
1699 * @param[in] params Forced username.
1702 static int iauth_cmd_username_forced(struct IAuth *iauth, struct Client *cli,
1703 int parc, char **params)
1705 assert(cli_auth(cli) != NULL);
1706 FlagClr(&cli_auth(cli)->flags, AR_AUTH_PENDING);
1707 if (!EmptyString(params[0])) {
1708 ircd_strncpy(cli_username(cli), params[0], USERLEN);
1710 FlagSet(&cli_auth(cli)->flags, AR_IAUTH_USERNAME);
1711 FlagSet(&cli_auth(cli)->flags, AR_IAUTH_FUSERNAME);
1716 /** Set client's username to a trusted string.
1717 * @param[in] iauth Active IAuth session.
1718 * @param[in] cli Client referenced by command.
1719 * @param[in] parc Number of parameters (1).
1720 * @param[in] params Trusted username.
1723 static int iauth_cmd_username_good(struct IAuth *iauth, struct Client *cli,
1724 int parc, char **params)
1726 assert(cli_auth(cli) != NULL);
1727 FlagClr(&cli_auth(cli)->flags, AR_AUTH_PENDING);
1728 if (!EmptyString(params[0])) {
1729 ircd_strncpy(cli_username(cli), params[0], USERLEN);
1731 FlagSet(&cli_auth(cli)->flags, AR_IAUTH_USERNAME);
1736 /** Set client's username to an untrusted string.
1737 * @param[in] iauth Active IAuth session.
1738 * @param[in] cli Client referenced by command.
1739 * @param[in] parc Number of parameters (1).
1740 * @param[in] params Untrusted username.
1743 static int iauth_cmd_username_bad(struct IAuth *iauth, struct Client *cli,
1744 int parc, char **params)
1746 assert(cli_auth(cli) != NULL);
1747 FlagClr(&cli_auth(cli)->flags, AR_AUTH_PENDING);
1748 if (!EmptyString(params[0]))
1749 ircd_strncpy(cli_user(cli)->username, params[0], USERLEN);
1753 /** Set client's hostname.
1754 * @param[in] iauth Active IAuth session.
1755 * @param[in] cli Client referenced by command.
1756 * @param[in] parc Number of parameters (1).
1757 * @param[in] params New hostname for client.
1758 * @return Non-zero if \a cli authorization should be checked for completion.
1760 static int iauth_cmd_hostname(struct IAuth *iauth, struct Client *cli,
1761 int parc, char **params)
1763 struct AuthRequest *auth;
1765 if (EmptyString(params[0])) {
1766 sendto_iauth(cli, "E Missing :Missing hostname parameter");
1770 auth = cli_auth(cli);
1771 assert(auth != NULL);
1773 /* If a DNS request is pending, abort it. */
1774 if (FlagHas(&auth->flags, AR_DNS_PENDING)) {
1775 FlagClr(&auth->flags, AR_DNS_PENDING);
1776 delete_resolver_queries(auth);
1777 if (IsUserPort(cli))
1778 sendheader(cli, REPORT_FIN_DNS);
1780 /* Set hostname from params. */
1781 ircd_strncpy(cli_sockhost(cli), params[0], HOSTLEN);
1782 /* If we have gotten here, the user is in a "hurry" state and has
1783 * been pre-registered. Their hostname was set during that, and
1784 * needs to be overwritten now.
1786 if (FlagHas(&auth->flags, AR_IAUTH_HURRY)) {
1787 ircd_strncpy(cli_user(cli)->host, cli_sockhost(cli), HOSTLEN);
1788 ircd_strncpy(cli_user(cli)->realhost, cli_sockhost(cli), HOSTLEN);
1793 /** Set client's IP address.
1794 * @param[in] iauth Active IAuth session.
1795 * @param[in] cli Client referenced by command.
1796 * @param[in] parc Number of parameters (1).
1797 * @param[in] params New IP address for client in dotted quad or
1798 * standard IPv6 format.
1801 static int iauth_cmd_ip_address(struct IAuth *iauth, struct Client *cli,
1802 int parc, char **params)
1804 struct irc_in_addr addr;
1805 struct AuthRequest *auth;
1807 if (EmptyString(params[0])) {
1808 sendto_iauth(cli, "E Missing :Missing IP address parameter");
1812 /* Get AuthRequest for client. */
1813 auth = cli_auth(cli);
1814 assert(auth != NULL);
1816 /* Parse the client's new IP address. */
1817 if (!ircd_aton(&addr, params[0])) {
1818 sendto_iauth(cli, "E Invalid :Unable to parse IP address [%s]", params[0]);
1822 /* If this is the first IP override, save the client's original
1823 * address in case we get a DNS response later.
1825 if (!irc_in_addr_valid(&auth->original))
1826 memcpy(&auth->original, &cli_ip(cli), sizeof(auth->original));
1828 /* Undo original IP connection in IPcheck. */
1829 IPcheck_connect_fail(cli);
1830 ClearIPChecked(cli);
1832 /* Update the IP and charge them as a remote connect. */
1833 memcpy(&cli_ip(cli), &addr, sizeof(cli_ip(cli)));
1834 IPcheck_remote_connect(cli, 0);
1839 /** Find a ConfItem structure for a named connection class.
1840 * @param[in] class_name Name of configuration class to find.
1841 * @return A ConfItem of type CONF_CLIENT for the class, or NULL on failure.
1843 static struct ConfItem *auth_find_class_conf(const char *class_name)
1845 static struct ConfItem *aconf_list;
1846 struct ConnectionClass *class;
1847 struct ConfItem *aconf;
1849 /* Make sure the configuration class is valid. */
1850 class = find_class(class_name);
1851 if (!class || !class->valid)
1854 /* Look for an existing ConfItem for the class. */
1855 for (aconf = aconf_list; aconf; aconf = aconf->next)
1856 if (aconf->conn_class == class)
1859 /* If no ConfItem, create one. */
1861 aconf = make_conf(CONF_CLIENT);
1863 sendto_opmask_butone(NULL, SNO_AUTH,
1864 "Unable to allocate ConfItem for class %s!",
1868 /* make_conf() "helpfully" links the conf into GlobalConfList,
1869 * which we do not want, so undo that. (Ugh.)
1871 if (aconf == GlobalConfList) {
1872 GlobalConfList = aconf->next;
1874 /* Back to business as usual. */
1875 aconf->conn_class = class;
1876 aconf->next = aconf_list;
1883 /** Accept a client in IAuth.
1884 * @param[in] iauth Active IAuth session.
1885 * @param[in] cli Client referenced by command.
1886 * @param[in] parc Number of parameters.
1887 * @param[in] params Optional class name for client.
1888 * @return Negative (CPTR_KILLED) if the connection is refused, one otherwise.
1890 static int iauth_cmd_done_client(struct IAuth *iauth, struct Client *cli,
1891 int parc, char **params)
1893 static time_t warn_time;
1895 /* Clear iauth pending flag. */
1896 assert(cli_auth(cli) != NULL);
1897 FlagClr(&cli_auth(cli)->flags, AR_IAUTH_PENDING);
1899 /* If a connection class was specified (and usable), assign the client to it. */
1900 if (!EmptyString(params[0])) {
1901 struct ConfItem *aconf;
1903 aconf = auth_find_class_conf(params[0]);
1905 enum AuthorizationCheckResult acr;
1907 acr = attach_conf(cli, aconf);
1910 /* There should maybe be some way to set FLAG_DOID here.. */
1912 case ACR_TOO_MANY_IN_CLASS:
1913 ++ServerStats->is_ref;
1914 return exit_client(cli, cli, &me,
1915 "Sorry, your connection class is full - try "
1916 "again later or try another server");
1918 log_write(LS_IAUTH, L_ERROR, 0, "IAuth: Unexpected AuthorizationCheckResult %d from attach_conf()", acr);
1922 sendto_opmask_butone_ratelimited(NULL, SNO_AUTH, &warn_time,
1923 "iauth tried to use undefined class [%s]",
1930 /** Accept a client in IAuth and assign them to an account.
1931 * @param[in] iauth Active IAuth session.
1932 * @param[in] cli Client referenced by command.
1933 * @param[in] parc Number of parameters.
1934 * @param[in] params Account name and optional class name for client.
1935 * @return Negative if the connection is refused, otherwise non-zero
1936 * if \a cli authorization should be checked for completion.
1938 static int iauth_cmd_done_account(struct IAuth *iauth, struct Client *cli,
1939 int parc, char **params)
1944 if (EmptyString(params[0])) {
1945 sendto_iauth(cli, "E Missing :Missing account parameter");
1948 /* Check length of account name. */
1949 len = strcspn(params[0], ": ");
1950 if (len > ACCOUNTLEN) {
1951 sendto_iauth(cli, "E Invalid :Account parameter too long");
1954 /* If account has a creation timestamp, use it. */
1955 assert(cli_user(cli) != NULL);
1956 if (params[0][len] == ':') {
1957 cli_user(cli)->acc_create = strtoul(params[0] + len + 1, NULL, 10);
1958 params[0][len] = '\0';
1961 /* Copy account name to User structure. */
1962 ircd_strncpy(cli_user(cli)->account, params[0], ACCOUNTLEN);
1965 /* Fall through to the normal "done" handler. */
1966 return iauth_cmd_done_client(iauth, cli, parc - 1, params + 1);
1969 /** Reject a client's connection.
1970 * @param[in] iauth Active IAuth session.
1971 * @param[in] cli Client referenced by command.
1972 * @param[in] parc Number of parameters (1).
1973 * @param[in] params Optional kill message.
1976 static int iauth_cmd_kill(struct IAuth *iauth, struct Client *cli,
1977 int parc, char **params)
1980 FlagClr(&cli_auth(cli)->flags, AR_IAUTH_PENDING);
1981 if (EmptyString(params[0]))
1982 params[0] = "Access denied";
1983 exit_client(cli, cli, &me, params[0]);
1987 /** Change a client's usermode.
1988 * @param[in] iauth Active IAuth session.
1989 * @param[in] cli Client referenced by command.
1990 * @param[in] parc Number of parameters (at least one).
1991 * @param[in] params Usermode arguments for client (with the first
1992 * starting with '+').
1995 static int iauth_cmd_usermode(struct IAuth *iauth, struct Client *cli,
1996 int parc, char **params)
1998 if (params[0][0] == '+')
2000 set_user_mode(cli, cli, parc + 2, params - 2, ALLOWMODES_ANY);
2006 /** Send a challenge string to the client.
2007 * @param[in] iauth Active IAuth session.
2008 * @param[in] cli Client referenced by command.
2009 * @param[in] parc Number of parameters (1).
2010 * @param[in] params Challenge message for client.
2013 static int iauth_cmd_challenge(struct IAuth *iauth, struct Client *cli,
2014 int parc, char **params)
2016 if (!EmptyString(params[0]))
2017 sendrawto_one(cli, "NOTICE AUTH :*** %s", params[0]);
2021 /** Send an extension query to a specified remote server.
2022 * @param[in] iauth Active IAuth session.
2023 * @param[in] cli Client referenced by command.
2024 * @param[in] parc Number of parameters (3).
2025 * @param[in] params Remote server, routing information, and query.
2028 static int iauth_cmd_xquery(struct IAuth *iauth, struct Client *cli,
2029 int parc, char **params)
2032 const char *routing;
2034 struct Client *acptr;
2036 /* Process parameters */
2037 if (EmptyString(params[0])) {
2038 sendto_iauth(cli, "E Missing :Missing server parameter");
2043 if (EmptyString(params[1])) {
2044 sendto_iauth(cli, "E Missing :Missing routing parameter");
2047 routing = params[1];
2049 if (EmptyString(params[2])) {
2050 sendto_iauth(cli, "E Missing :Missing query parameter");
2055 /* Try to find the specified server */
2056 if (!(acptr = find_match_server(serv))) {
2057 sendto_iauth(cli, "x %s %s :Server not online", serv, routing);
2061 /* If it's to us, do nothing; otherwise, forward the query */
2063 /* The "iauth:" prefix helps ircu route the reply to iauth */
2064 sendcmdto_one(&me, CMD_XQUERY, acptr, "%C iauth:%s :%s", acptr, routing,
2070 /** Parse a \a message from \a iauth.
2071 * @param[in] iauth Active IAuth session.
2072 * @param[in] message Message to be parsed.
2074 static void iauth_parse(struct IAuth *iauth, char *message)
2076 char *params[MAXPARA + 1]; /* leave space for NULL */
2078 iauth_cmd_handler handler;
2079 struct AuthRequest *auth;
2084 /* Find command handler... */
2085 switch (*(message++)) {
2086 case '>': handler = iauth_cmd_snotice; has_cli = 0; break;
2087 case 'G': handler = iauth_cmd_debuglevel; has_cli = 0; break;
2088 case 'O': handler = iauth_cmd_policy; has_cli = 0; break;
2089 case 'V': handler = iauth_cmd_version; has_cli = 0; break;
2090 case 'a': handler = iauth_cmd_newconfig; has_cli = 0; break;
2091 case 'A': handler = iauth_cmd_config; has_cli = 0; break;
2092 case 's': handler = iauth_cmd_newstats; has_cli = 0; break;
2093 case 'S': handler = iauth_cmd_stats; has_cli = 0; break;
2094 case 'X': handler = iauth_cmd_xquery; has_cli = 0; break;
2095 case 'o': handler = iauth_cmd_username_forced; has_cli = 1; break;
2096 case 'U': handler = iauth_cmd_username_good; has_cli = 1; break;
2097 case 'u': handler = iauth_cmd_username_bad; has_cli = 1; break;
2098 case 'N': handler = iauth_cmd_hostname; has_cli = 1; break;
2099 case 'I': handler = iauth_cmd_ip_address; has_cli = 1; break;
2100 case 'M': handler = iauth_cmd_usermode; has_cli = 1; break;
2101 case 'C': handler = iauth_cmd_challenge; has_cli = 1; break;
2102 case 'D': handler = iauth_cmd_done_client; has_cli = 1; break;
2103 case 'R': handler = iauth_cmd_done_account; has_cli = 1; break;
2104 case 'k': /* The 'k' command indicates the user should be booted
2105 * off without telling opers. There is no way to
2106 * signal that to exit_client(), so we fall through to
2107 * the case that we do implement.
2109 case 'K': handler = iauth_cmd_kill; has_cli = 2; break;
2110 case 'r': /* we handle termination directly */ return;
2111 default: sendto_iauth(NULL, "E Garbage :[%s]", message); return;
2114 while (parc < MAXPARA) {
2115 while (IsSpace(*message)) /* skip leading whitespace */
2118 if (!*message) /* hit the end of the string, break out */
2121 if (*message == ':') { /* found sentinel... */
2122 params[parc++] = message + 1;
2123 break; /* it's the last parameter anyway */
2126 params[parc++] = message; /* save the parameter */
2127 while (*message && !IsSpace(*message))
2128 message++; /* find the end of the parameter */
2130 if (*message) /* terminate the parameter */
2131 *(message++) = '\0';
2134 params[parc] = NULL; /* terminate the parameter list */
2136 /* Check to see if the command specifies a client... */
2138 /* Handler does not need a client. */
2139 handler(iauth, NULL, parc, params);
2141 /* Try to find the client associated with the request. */
2142 id = strtol(params[0], NULL, 10);
2144 sendto_iauth(NULL, "E Missing :Need <id> <ip> <port>");
2145 else if (id < 0 || id > HighestFd || !(cli = LocalClientArray[id]))
2146 /* Client no longer exists (or never existed). */
2147 sendto_iauth(NULL, "E Gone :[%s %s %s]", params[0], params[1],
2149 else if ((!(auth = cli_auth(cli)) ||
2150 !FlagHas(&auth->flags, AR_IAUTH_PENDING)) &&
2152 /* Client is done with IAuth checks. */
2153 sendto_iauth(cli, "E Done :[%s %s %s]", params[0], params[1], params[2]);
2155 struct irc_sockaddr addr;
2158 /* Parse IP address and port number from parameters */
2159 res = ipmask_parse(params[1], &addr.addr, NULL);
2160 addr.port = strtol(params[2], NULL, 10);
2162 /* Check IP address and port number against expected. */
2164 irc_in_addr_cmp(&addr.addr, &cli_ip(cli)) ||
2165 (auth && addr.port != auth->port))
2166 /* Report mismatch to iauth. */
2167 sendto_iauth(cli, "E Mismatch :[%s] != [%s]", params[1],
2168 ircd_ntoa(&cli_ip(cli)));
2169 else if (handler(iauth, cli, parc - 3, params + 3) > 0)
2170 /* Handler indicated a possible state change. */
2171 check_auth_finished(auth);
2176 /** Read input from \a iauth.
2177 * Reads up to SERVER_TCP_WINDOW bytes per pass.
2178 * @param[in] iauth Readable connection.
2180 static void iauth_read(struct IAuth *iauth)
2182 static char readbuf[SERVER_TCP_WINDOW];
2183 unsigned int length, count;
2187 /* Copy partial data to readbuf, append new data. */
2188 length = iauth->i_count;
2189 memcpy(readbuf, iauth->i_buffer, length);
2190 if (IO_SUCCESS != os_recv_nonb(s_fd(i_socket(iauth)),
2192 sizeof(readbuf) - length - 1,
2195 readbuf[length += count] = '\0';
2197 /* Parse each complete line. */
2198 for (sol = readbuf; (eol = strchr(sol, '\n')) != NULL; sol = eol + 1) {
2200 if (*(eol - 1) == '\r') /* take out carriage returns, too... */
2203 /* If spammy debug, send the message to opers. */
2204 if (i_debug(iauth) > 1)
2205 sendto_opmask_butone(NULL, SNO_AUTH, "Parsing: \"%s\"", sol);
2207 /* Parse the line... */
2208 iauth_parse(iauth, sol);
2211 /* Put unused data back into connection's buffer. */
2212 iauth->i_count = strlen(sol);
2213 if (iauth->i_count > BUFSIZE)
2214 iauth->i_count = BUFSIZE;
2215 memcpy(iauth->i_buffer, sol, iauth->i_count);
2218 /** Handle socket activity for an %IAuth connection.
2219 * @param[in] ev &Socket event; the IAuth connection is the user data
2220 * pointer for the socket.
2222 static void iauth_sock_callback(struct Event *ev)
2224 struct IAuth *iauth;
2226 assert(0 != ev_socket(ev));
2227 iauth = (struct IAuth*) s_data(ev_socket(ev));
2230 switch (ev_type(ev)) {
2232 /* Hm, what happened here? */
2233 if (!IAuthHas(iauth, IAUTH_CLOSING))
2234 iauth_do_spawn(iauth, 1);
2240 IAuthClr(iauth, IAUTH_BLOCKED);
2244 log_write(LS_IAUTH, L_ERROR, 0, "IAuth socket error: %s", strerror(ev_data(ev)));
2245 /* and fall through to the ET_EOF case */
2247 iauth_disconnect(iauth);
2250 assert(0 && "Unrecognized event type");
2255 /** Read error input from \a iauth.
2256 * @param[in] iauth Readable connection.
2258 static void iauth_read_stderr(struct IAuth *iauth)
2260 static char readbuf[SERVER_TCP_WINDOW];
2261 unsigned int length, count;
2265 /* Copy partial data to readbuf, append new data. */
2266 length = iauth->i_errcount;
2267 memcpy(readbuf, iauth->i_errbuf, length);
2268 if (IO_SUCCESS != os_recv_nonb(s_fd(i_stderr(iauth)),
2270 sizeof(readbuf) - length - 1,
2273 readbuf[length += count] = '\0';
2275 /* Send each complete line to SNO_AUTH. */
2276 for (sol = readbuf; (eol = strchr(sol, '\n')) != NULL; sol = eol + 1) {
2278 if (*(eol - 1) == '\r') /* take out carriage returns, too... */
2280 Debug((DEBUG_ERROR, "IAuth error: %s", sol));
2281 log_write(LS_IAUTH, L_ERROR, 0, "IAuth error: %s", sol);
2282 sendto_opmask_butone(NULL, SNO_AUTH, "%s", sol);
2285 /* Put unused data back into connection's buffer. */
2286 iauth->i_errcount = strlen(sol);
2287 if (iauth->i_errcount > BUFSIZE)
2288 iauth->i_errcount = BUFSIZE;
2289 memcpy(iauth->i_errbuf, sol, iauth->i_errcount);
2292 /** Handle error socket activity for an %IAuth connection.
2293 * @param[in] ev &Socket event; the IAuth connection is the user data
2294 * pointer for the socket.
2296 static void iauth_stderr_callback(struct Event *ev)
2298 struct IAuth *iauth;
2300 assert(0 != ev_socket(ev));
2301 iauth = (struct IAuth*) s_data(ev_socket(ev));
2304 switch (ev_type(ev)) {
2306 /* We do not restart iauth here: the stdout handler does that for us. */
2309 iauth_read_stderr(iauth);
2312 log_write(LS_IAUTH, L_ERROR, 0, "IAuth stderr error: %s", strerror(ev_data(ev)));
2313 /* and fall through to the ET_EOF case */
2315 iauth_disconnect(iauth);
2318 assert(0 && "Unrecognized event type");
2323 /** Report active iauth's configuration to \a cptr.
2324 * @param[in] cptr Client requesting statistics.
2325 * @param[in] sd Stats descriptor for request.
2326 * @param[in] param Extra parameter from user (may be NULL).
2328 void report_iauth_conf(struct Client *cptr, const struct StatDesc *sd, char *param)
2332 if (iauth) for (link = iauth->i_config; link; link = link->next)
2334 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":%s",
2339 /** Report active iauth's statistics to \a cptr.
2340 * @param[in] cptr Client requesting statistics.
2341 * @param[in] sd Stats descriptor for request.
2342 * @param[in] param Extra parameter from user (may be NULL).
2344 void report_iauth_stats(struct Client *cptr, const struct StatDesc *sd, char *param)
2348 if (iauth) for (link = iauth->i_stats; link; link = link->next)
2350 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":%s",