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_IAUTH_SOFT_DONE, /**< iauth has no objection to client */
88 AR_PASSWORD_CHECKED, /**< client password already checked */
92 DECLARE_FLAGSET(AuthRequestFlags, AR_NUM_FLAGS);
94 /** Stores registration state of a client. */
96 struct AuthRequest* next; /**< linked list node ptr */
97 struct AuthRequest* prev; /**< linked list node ptr */
98 struct Client* client; /**< pointer to client struct for request */
99 struct irc_sockaddr local; /**< local endpoint address */
100 struct irc_in_addr original; /**< original client IP address */
101 struct Socket socket; /**< socket descriptor for auth queries */
102 struct Timer timeout; /**< timeout timer for ident and dns queries */
103 struct AuthRequestFlags flags; /**< current state of request */
104 unsigned int cookie; /**< cookie the user must PONG */
105 unsigned short port; /**< client's remote port number */
108 /** Array of message text (with length) pairs for AUTH status
109 * messages. Indexed using #ReportType.
114 } HeaderMessages [] = {
115 #define MSG(STR) { STR, sizeof(STR) - 1 }
116 MSG("NOTICE AUTH :*** Looking up your hostname\r\n"),
117 MSG("NOTICE AUTH :*** Found your hostname\r\n"),
118 MSG("NOTICE AUTH :*** Couldn't look up your hostname\r\n"),
119 MSG("NOTICE AUTH :*** Checking Ident\r\n"),
120 MSG("NOTICE AUTH :*** Got ident response\r\n"),
121 MSG("NOTICE AUTH :*** No ident response\r\n"),
122 MSG("NOTICE AUTH :*** \r\n"),
123 MSG("NOTICE AUTH :*** Your forward and reverse DNS do not match, "
124 "ignoring hostname.\r\n"),
125 MSG("NOTICE AUTH :*** Invalid hostname\r\n")
129 /** Enum used to index messages in the HeaderMessages[] array. */
142 /** Sends response \a r (from #ReportType) to client \a c. */
143 #define sendheader(c, r) \
144 send(cli_fd(c), HeaderMessages[(r)].message, HeaderMessages[(r)].length, 0)
146 /** Enumeration of IAuth connection flags. */
149 IAUTH_BLOCKED, /**< socket buffer full */
150 IAUTH_CLOSING, /**< candidate to be disposed */
151 /* The following flags are controlled by iauth's "O" options command. */
152 IAUTH_ADDLINFO, /**< Send additional info
153 * (password and username). */
154 IAUTH_FIRST_OPTION = IAUTH_ADDLINFO, /**< First flag that is a policy option. */
155 IAUTH_REQUIRED, /**< IAuth completion required for registration. */
156 IAUTH_TIMEOUT, /**< Refuse new connections if IAuth is behind. */
157 IAUTH_EXTRAWAIT, /**< Give IAuth extra time to answer. */
158 IAUTH_UNDERNET, /**< Enable Undernet extensions. */
159 IAUTH_LAST_FLAG /**< total number of flags */
161 /** Declare a bitset structure indexed by IAuthFlag. */
162 DECLARE_FLAGSET(IAuthFlags, IAUTH_LAST_FLAG);
164 /** Describes state of an IAuth connection. */
166 struct MsgQ i_sendQ; /**< messages queued to send */
167 struct Socket i_socket; /**< main socket to iauth */
168 struct Socket i_stderr; /**< error socket for iauth */
169 struct IAuthFlags i_flags; /**< connection state/status/flags */
170 uint64_t i_recvB; /**< bytes received */
171 uint64_t i_sendB; /**< bytes sent */
172 time_t started; /**< time that this instance was started */
173 unsigned int i_recvM; /**< messages received */
174 unsigned int i_sendM; /**< messages sent */
175 unsigned int i_count; /**< characters used in i_buffer */
176 unsigned int i_errcount; /**< characters used in i_errbuf */
177 int i_debug; /**< debug level */
178 char i_buffer[BUFSIZE+1]; /**< partial unprocessed line from server */
179 char i_errbuf[BUFSIZE+1]; /**< partial unprocessed error line */
180 char *i_version; /**< iauth version string */
181 struct SLink *i_config; /**< configuration string list */
182 struct SLink *i_stats; /**< statistics string list */
183 char **i_argv; /**< argument list */
186 /** Return whether flag \a flag is set on \a iauth. */
187 #define IAuthHas(iauth, flag) ((iauth) && FlagHas(&(iauth)->i_flags, flag))
188 /** Set flag \a flag on \a iauth. */
189 #define IAuthSet(iauth, flag) FlagSet(&(iauth)->i_flags, flag)
190 /** Clear flag \a flag from \a iauth. */
191 #define IAuthClr(iauth, flag) FlagClr(&(iauth)->i_flags, flag)
192 /** Get connected flag for \a iauth. */
193 #define i_GetConnected(iauth) ((iauth) && s_fd(i_socket(iauth)) > -1)
195 /** Return socket event generator for \a iauth. */
196 #define i_socket(iauth) (&(iauth)->i_socket)
197 /** Return stderr socket for \a iauth. */
198 #define i_stderr(iauth) (&(iauth)->i_stderr)
199 /** Return outbound message queue for \a iauth. */
200 #define i_sendQ(iauth) (&(iauth)->i_sendQ)
201 /** Return debug level for \a iauth. */
202 #define i_debug(iauth) ((iauth)->i_debug)
204 /** Active instance of IAuth. */
205 static struct IAuth *iauth;
206 /** Freelist of AuthRequest structures. */
207 static struct AuthRequest *auth_freelist;
209 static void iauth_sock_callback(struct Event *ev);
210 static void iauth_stderr_callback(struct Event *ev);
211 static int sendto_iauth(struct Client *cptr, const char *format, ...);
212 static int preregister_user(struct Client *cptr);
213 typedef int (*iauth_cmd_handler)(struct IAuth *iauth, struct Client *cli,
214 int parc, char **params);
216 /** Set username for user associated with \a auth.
217 * @param[in] auth Client authorization request to work on.
218 * @return Zero if client is kept, CPTR_KILLED if client rejected.
220 static int auth_set_username(struct AuthRequest *auth)
222 struct Client *sptr = auth->client;
223 struct User *user = cli_user(sptr);
234 short digitgroups = 0;
238 if (FlagHas(&auth->flags, AR_IAUTH_USERNAME))
240 ircd_strncpy(cli_user(sptr)->username, cli_username(sptr), USERLEN);
244 /* Copy username from source to destination. Since they may be the
245 * same, and we may prefix with a '~', use a buffer character (ch)
246 * to hold the next character to copy.
248 s = IsIdented(sptr) ? cli_username(sptr) : user->username;
251 if (HasFlag(sptr, FLAG_DOID) && !IsIdented(sptr))
256 while (last && !IsCntrl(last) && rlen--)
259 *d++ = IsUserChar(last) ? last : '_';
260 last = (ch != '~') ? ch : '_';
265 /* If username is empty or just ~, reject. */
266 if ((user->username[0] == '\0')
267 || ((user->username[0] == '~') && (user->username[1] == '\0')))
268 return exit_client(sptr, sptr, &me, "USER: Bogus userid.");
270 /* Check for K- or G-line. */
271 killreason = find_kill(sptr);
273 ServerStats->is_ref++;
274 return exit_client(sptr, sptr, &me,
275 (killreason == -1 ? "K-lined" : "G-lined"));
278 if (!FlagHas(&auth->flags, AR_IAUTH_FUSERNAME))
280 /* Check for mixed case usernames, meaning probably hacked. Jon2 3-94
281 * Explanations of rules moved to where it is checked Entrope 2-06
283 s = d = user->username + (user->username[0] == '~');
292 else if (IsUpper(ch))
295 /* Accept caps as leading if we haven't seen lower case or digits yet. */
296 if ((leadcaps || pos == 0) && !lower && !digits)
299 else if (IsDigit(ch))
302 if (pos == 0 || !IsDigit(last))
305 /* If more than two groups of digits, reject. */
310 else if (ch == '-' || ch == '_' || ch == '.')
313 /* If -_. exist at start, consecutively, or more than twice, reject. */
314 if (pos == 0 || last == '-' || last == '_' || last == '.' || other > 2)
317 else /* All other punctuation is rejected. */
321 /* If mixed case, first must be capital, but no more than three;
322 * but if three capitals, they must all be leading. */
323 if (lower && upper && (!leadcaps || leadcaps > 3 ||
324 (upper > 2 && upper > leadcaps)))
326 /* If two different groups of digits, one must be either at the
328 if (digitgroups == 2 && !(IsDigit(s[0]) || IsDigit(ch)))
330 /* Must have at least one letter. */
331 if (!lower && !upper)
333 /* Final character must not be punctuation. */
341 /* If we confirmed their username, and it is what they claimed,
343 if (IsIdented(sptr) && !strcmp(cli_username(sptr), user->username))
346 ServerStats->is_ref++;
347 send_reply(sptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
348 ":Your username is invalid.");
349 send_reply(sptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
350 ":Connect with your real username, in lowercase.");
351 send_reply(sptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
352 ":If your mail address were foo@bar.com, your username "
354 return exit_client(sptr, sptr, &me, "USER: Bad username");
357 /** Check whether an authorization request is complete.
358 * This means that no flags from 0 to #AR_LAST_SCAN are set on \a auth.
359 * If #AR_IAUTH_PENDING is set, optionally go into "hurry" state. If
360 * 0 through #AR_LAST_SCAN and #AR_IAUTH_PENDING are all clear,
361 * destroy \a auth, clear the password, set the username, and register
363 * @param[in] auth Authorization request to check.
364 * @return Zero if client is kept, CPTR_KILLED if client rejected.
366 static int check_auth_finished(struct AuthRequest *auth)
368 enum AuthRequestFlag flag;
371 /* Check non-iauth registration blocking flags. */
372 for (flag = 0; flag <= AR_LAST_SCAN; ++flag)
373 if (FlagHas(&auth->flags, flag))
375 Debug((DEBUG_INFO, "Auth %p [%d] still has flag %d", auth,
376 cli_fd(auth->client), flag));
380 /* If appropriate, do preliminary assignment to connection class. */
381 if (IsUserPort(auth->client)
382 && !FlagHas(&auth->flags, AR_IAUTH_HURRY)
383 && preregister_user(auth->client))
386 /* If we have not done so, check client password. Do this as soon
387 * as possible so that iauth's challenge/response (which uses PASS
388 * for responses) is not confused with the client's password.
390 if (IsUserPort(auth->client)
391 && !FlagHas(&auth->flags, AR_PASSWORD_CHECKED))
393 struct ConfItem *aconf;
395 aconf = cli_confs(auth->client)->value.aconf;
397 && !EmptyString(aconf->passwd)
398 && strcmp(cli_passwd(auth->client), aconf->passwd))
400 ServerStats->is_ref++;
401 send_reply(auth->client, ERR_PASSWDMISMATCH);
402 return exit_client(auth->client, auth->client, &me, "Bad Password");
404 FlagSet(&auth->flags, AR_PASSWORD_CHECKED);
407 /* Check if iauth is done. */
408 if (FlagHas(&auth->flags, AR_IAUTH_PENDING))
410 /* Switch auth request to hurry-up state. */
411 if (!FlagHas(&auth->flags, AR_IAUTH_HURRY))
413 /* Set "hurry" flag in auth request. */
414 FlagSet(&auth->flags, AR_IAUTH_HURRY);
416 /* If iauth wants it, send notification. */
417 if (IAuthHas(iauth, IAUTH_UNDERNET))
418 sendto_iauth(auth->client, "H %s", get_client_class(auth->client));
420 /* If iauth wants it, give client more time. */
421 if (IAuthHas(iauth, IAUTH_EXTRAWAIT))
422 cli_firsttime(auth->client) = CurrentTime;
425 Debug((DEBUG_INFO, "Auth %p [%d] still has flag %d", auth,
426 cli_fd(auth->client), AR_IAUTH_PENDING));
430 FlagSet(&auth->flags, AR_IAUTH_HURRY);
432 if (IsUserPort(auth->client))
434 memset(cli_passwd(auth->client), 0, sizeof(cli_passwd(auth->client)));
435 res = auth_set_username(auth);
437 res = register_user(auth->client, auth->client);
442 destroy_auth_request(auth);
446 /** Verify that a hostname is valid, i.e., only contains characters
447 * valid for a hostname and that a hostname is not too long.
448 * @param host Hostname to check.
449 * @param maxlen Maximum length of hostname, not including NUL terminator.
450 * @return Non-zero if the hostname is valid.
453 auth_verify_hostname(const char *host, int maxlen)
457 /* Walk through the host name */
458 for (i = 0; host[i]; i++)
459 /* If it's not a hostname character or if it's too long, return false */
460 if (!IsHostChar(host[i]) || i >= maxlen)
463 return 1; /* it's a valid hostname */
466 /** Check whether a client already has a CONF_CLIENT configuration
469 * @return A pointer to the client's first CONF_CLIENT, or NULL if
472 static struct ConfItem *find_conf_client(struct Client *cptr)
476 for (list = cli_confs(cptr); list != NULL; list = list->next) {
477 struct ConfItem *aconf;
478 aconf = list->value.aconf;
479 if (aconf->status & CONF_CLIENT)
486 /** Assign a client to a connection class.
487 * @param[in] cptr Client to assign to a class.
488 * @return Zero if client is kept, CPTR_KILLED if rejected.
490 static int preregister_user(struct Client *cptr)
492 static time_t last_too_many1;
493 static time_t last_too_many2;
495 ircd_strncpy(cli_user(cptr)->host, cli_sockhost(cptr), HOSTLEN);
496 ircd_strncpy(cli_user(cptr)->realhost, cli_sockhost(cptr), HOSTLEN);
498 if (find_conf_client(cptr)) {
502 switch (conf_check_client(cptr))
506 case ACR_NO_AUTHORIZATION:
507 sendto_opmask_butone(0, SNO_UNAUTH, "Unauthorized connection from %s.",
508 get_client_name(cptr, HIDE_IP));
509 ++ServerStats->is_ref;
510 return exit_client(cptr, cptr, &me,
511 "No Authorization - use another server");
512 case ACR_TOO_MANY_IN_CLASS:
513 sendto_opmask_butone_ratelimited(0, SNO_TOOMANY, &last_too_many1,
514 "Too many connections in class %s for %s.",
515 get_client_class(cptr),
516 get_client_name(cptr, SHOW_IP));
517 ++ServerStats->is_ref;
518 return exit_client(cptr, cptr, &me,
519 "Sorry, your connection class is full - try "
520 "again later or try another server");
521 case ACR_TOO_MANY_FROM_IP:
522 sendto_opmask_butone_ratelimited(0, SNO_TOOMANY, &last_too_many2,
523 "Too many connections from same IP for %s.",
524 get_client_name(cptr, SHOW_IP));
525 ++ServerStats->is_ref;
526 return exit_client(cptr, cptr, &me,
527 "Too many connections from your host");
528 case ACR_ALREADY_AUTHORIZED:
529 /* Can this ever happen? */
531 ++ServerStats->is_ref;
532 IPcheck_connect_fail(cptr, 0);
533 return exit_client(cptr, cptr, &me, "Unknown error -- Try again");
538 /** Send the ident server a query giving "theirport , ourport". The
539 * write is only attempted *once* so it is deemed to be a fail if the
540 * entire write doesn't write all the data given. This shouldn't be a
541 * problem since the socket should have a write buffer far greater
542 * than this message to store it in should problems arise. -avalon
543 * @param[in] auth The request to send.
545 static void send_auth_query(struct AuthRequest* auth)
552 ircd_snprintf(0, authbuf, sizeof(authbuf), "%hu , %hu\r\n",
553 auth->port, auth->local.port);
555 if (IO_SUCCESS != os_send_nonb(s_fd(&auth->socket), authbuf, strlen(authbuf), &count)) {
556 close(s_fd(&auth->socket));
557 socket_del(&auth->socket);
558 s_fd(&auth->socket) = -1;
559 ++ServerStats->is_abad;
560 if (IsUserPort(auth->client))
561 sendheader(auth->client, REPORT_FAIL_ID);
562 FlagClr(&auth->flags, AR_AUTH_PENDING);
563 check_auth_finished(auth);
567 /** Enum used to index ident reply fields in a human-readable way. */
568 enum IdentReplyFields {
576 /** Parse an ident reply line and extract the userid from it.
577 * @param[in] reply The ident reply line.
578 * @return The userid, or NULL on parse failure.
580 static char* check_ident_reply(char* reply)
584 char* vector[USERID_TOKEN_COUNT];
585 int count = token_vector(reply, ':', vector, USERID_TOKEN_COUNT);
587 if (USERID_TOKEN_COUNT != count)
590 * second token is the reply type
592 token = vector[IDENT_REPLY_TYPE];
593 if (EmptyString(token))
596 while (IsSpace(*token))
599 if (0 != strncmp(token, "USERID", 6))
603 * third token is the os type
605 token = vector[IDENT_OS_TYPE];
606 if (EmptyString(token))
608 while (IsSpace(*token))
612 * Unless "OTHER" is specified as the operating system
613 * type, the server is expected to return the "normal"
614 * user identification of the owner of this connection.
615 * "Normal" in this context may be taken to mean a string
616 * of characters which uniquely identifies the connection
617 * owner such as a user identifier assigned by the system
618 * administrator and used by such user as a mail
619 * identifier, or as the "user" part of a user/password
620 * pair used to gain access to system resources. When an
621 * operating system is specified (e.g., anything but
622 * "OTHER"), the user identifier is expected to be in a
623 * more or less immediately useful form - e.g., something
624 * that could be used as an argument to "finger" or as a
627 if (0 == strncmp(token, "OTHER", 5))
630 * fourth token is the username
632 token = vector[IDENT_INFO];
633 if (EmptyString(token))
635 while (IsSpace(*token))
638 * look for the end of the username, terminators are '\0, @, <SPACE>, :'
640 for (end = token; *end; ++end) {
641 if (IsSpace(*end) || '@' == *end || ':' == *end)
648 /** Read the reply (if any) from the ident server we connected to. We
649 * only give it one shot, if the reply isn't good the first time fail
650 * the authentication entirely. --Bleep
651 * @param[in] auth The request to read.
653 static void read_auth_reply(struct AuthRequest* auth)
658 * rfc1453 sez we MUST accept 512 bytes
660 char buf[BUFSIZE + 1];
663 assert(0 != auth->client);
664 assert(auth == cli_auth(auth->client));
666 if (IO_SUCCESS == os_recv_nonb(s_fd(&auth->socket), buf, BUFSIZE, &len)) {
668 Debug((DEBUG_INFO, "Auth %p [%d] reply: %s", auth, cli_fd(auth->client), buf));
669 username = check_ident_reply(buf);
670 Debug((DEBUG_INFO, "Username: %s", username));
673 Debug((DEBUG_INFO, "Deleting auth [%d] socket %p", auth, cli_fd(auth->client)));
674 close(s_fd(&auth->socket));
675 socket_del(&auth->socket);
676 s_fd(&auth->socket) = -1;
678 if (EmptyString(username)) {
679 if (IsUserPort(auth->client))
680 sendheader(auth->client, REPORT_FAIL_ID);
681 ++ServerStats->is_abad;
682 if (IAuthHas(iauth, IAUTH_UNDERNET))
683 sendto_iauth(auth->client, "u");
685 if (IsUserPort(auth->client))
686 sendheader(auth->client, REPORT_FIN_ID);
687 ++ServerStats->is_asuc;
688 if (!FlagHas(&auth->flags, AR_IAUTH_USERNAME)) {
689 ircd_strncpy(cli_username(auth->client), username, USERLEN);
690 SetGotId(auth->client);
692 if (IAuthHas(iauth, IAUTH_UNDERNET))
693 sendto_iauth(auth->client, "u %s", username);
696 FlagClr(&auth->flags, AR_AUTH_PENDING);
697 check_auth_finished(auth);
700 /** Handle socket I/O activity.
701 * @param[in] ev A socket event whos associated data is the active
702 * struct AuthRequest.
704 static void auth_sock_callback(struct Event* ev)
706 struct AuthRequest* auth;
708 assert(0 != ev_socket(ev));
709 assert(0 != s_data(ev_socket(ev)));
711 auth = (struct AuthRequest*) s_data(ev_socket(ev));
713 switch (ev_type(ev)) {
714 case ET_DESTROY: /* being destroyed */
717 case ET_CONNECT: /* socket connection completed */
718 Debug((DEBUG_INFO, "Connection completed for auth %p [%d]; sending query",
719 auth, cli_fd(auth->client)));
720 socket_state(&auth->socket, SS_CONNECTED);
721 send_auth_query(auth);
724 case ET_READ: /* socket is readable */
725 case ET_EOF: /* end of file on socket */
726 case ET_ERROR: /* error on socket */
727 Debug((DEBUG_INFO, "Auth socket %p [%p] readable", auth, ev_socket(ev)));
728 read_auth_reply(auth);
732 assert(0 && "Unrecognized event in auth_socket_callback().");
737 /** Stop an auth request completely.
738 * @param[in] auth The struct AuthRequest to cancel.
740 void destroy_auth_request(struct AuthRequest* auth)
742 Debug((DEBUG_INFO, "Deleting auth request for %p", auth->client));
744 if (FlagHas(&auth->flags, AR_DNS_PENDING)) {
745 delete_resolver_queries(auth);
748 if (-1 < s_fd(&auth->socket)) {
749 close(s_fd(&auth->socket));
750 socket_del(&auth->socket);
751 s_fd(&auth->socket) = -1;
754 if (t_active(&auth->timeout))
755 timer_del(&auth->timeout);
757 cli_auth(auth->client) = NULL;
758 auth->next = auth_freelist;
759 auth_freelist = auth;
762 /** Handle a 'ping' (authorization) timeout for a client.
763 * @param[in] cptr The client whose session authorization has timed out.
764 * @return Zero if client is kept, CPTR_KILLED if client rejected.
766 int auth_ping_timeout(struct Client *cptr)
768 struct AuthRequest *auth;
769 enum AuthRequestFlag flag;
771 auth = cli_auth(cptr);
773 /* Check whether the auth request is gone (more likely, it never
774 * existed, as in an outbound server connection). */
776 return exit_client_msg(cptr, cptr, &me, "Registration Timeout");
778 /* Check for a user-controlled timeout. */
779 for (flag = 0; flag <= AR_LAST_SCAN; ++flag) {
780 if (FlagHas(&auth->flags, flag)) {
781 /* Display message if they have sent a NICK and a USER but no
784 if (*(cli_name(cptr)) && cli_user(cptr) && *(cli_user(cptr))->username) {
785 send_reply(cptr, SND_EXPLICIT | ERR_BADPING,
786 ":Your client may not be compatible with this server.");
787 send_reply(cptr, SND_EXPLICIT | ERR_BADPING,
788 ":Compatible clients are available at %s",
789 feature_str(FEAT_URL_CLIENTS));
791 return exit_client_msg(cptr, cptr, &me, "Registration Timeout");
795 /* Check for iauth timeout. */
796 if (FlagHas(&auth->flags, AR_IAUTH_PENDING)) {
797 if (IAuthHas(iauth, IAUTH_REQUIRED)
798 && !FlagHas(&auth->flags, AR_IAUTH_SOFT_DONE)) {
799 sendheader(cptr, REPORT_FAIL_IAUTH);
800 return exit_client_msg(cptr, cptr, &me, "Authorization Timeout");
802 sendto_iauth(cptr, "T");
803 FlagClr(&auth->flags, AR_IAUTH_PENDING);
804 return check_auth_finished(auth);
807 assert(0 && "Unexpectedly reached end of auth_ping_timeout()");
811 /** Timeout a given auth request.
812 * @param[in] ev A timer event whose associated data is the expired
813 * struct AuthRequest.
815 static void auth_timeout_callback(struct Event* ev)
817 struct AuthRequest* auth;
819 assert(0 != ev_timer(ev));
820 assert(0 != t_data(ev_timer(ev)));
822 auth = (struct AuthRequest*) t_data(ev_timer(ev));
824 if (ev_type(ev) == ET_EXPIRE) {
825 /* Report the timeout in the log. */
826 log_write(LS_RESOLVER, L_INFO, 0, "Registration timeout %s",
827 get_client_name(auth->client, HIDE_IP));
829 /* Notify client if ident lookup failed. */
830 if (FlagHas(&auth->flags, AR_AUTH_PENDING)) {
831 FlagClr(&auth->flags, AR_AUTH_PENDING);
832 if (IsUserPort(auth->client))
833 sendheader(auth->client, REPORT_FAIL_ID);
836 /* Likewise if dns lookup failed. */
837 if (FlagHas(&auth->flags, AR_DNS_PENDING)) {
838 FlagClr(&auth->flags, AR_DNS_PENDING);
839 delete_resolver_queries(auth);
840 if (IsUserPort(auth->client))
841 sendheader(auth->client, REPORT_FAIL_DNS);
844 /* Try to register the client. */
845 check_auth_finished(auth);
849 /** Handle a complete DNS lookup. Send the client on it's way to a
850 * connection completion, regardless of success or failure -- unless
851 * there was a mismatch and KILL_IPMISMATCH is set.
852 * @param[in] vptr The pending struct AuthRequest.
853 * @param[in] addr IP address being resolved.
854 * @param[in] h_name Resolved name, or NULL if lookup failed.
856 static void auth_dns_callback(void* vptr, const struct irc_in_addr *addr, const char *h_name)
858 struct AuthRequest* auth = (struct AuthRequest*) vptr;
861 FlagClr(&auth->flags, AR_DNS_PENDING);
863 /* DNS entry was missing for the IP. */
864 if (IsUserPort(auth->client))
865 sendheader(auth->client, REPORT_FAIL_DNS);
866 sendto_iauth(auth->client, "d");
867 } else if (!irc_in_addr_valid(addr)
868 || (irc_in_addr_cmp(&cli_ip(auth->client), addr)
869 && irc_in_addr_cmp(&auth->original, addr))) {
870 /* IP for hostname did not match client's IP. */
871 sendto_opmask_butone(0, SNO_IPMISMATCH, "IP# Mismatch: %s != %s[%s]",
872 cli_sock_ip(auth->client), h_name,
874 if (IsUserPort(auth->client))
875 sendheader(auth->client, REPORT_IP_MISMATCH);
876 if (feature_bool(FEAT_KILL_IPMISMATCH)) {
877 exit_client(auth->client, auth->client, &me, "IP mismatch");
880 } else if (!auth_verify_hostname(h_name, HOSTLEN)) {
881 /* Hostname did not look valid. */
882 if (IsUserPort(auth->client))
883 sendheader(auth->client, REPORT_INVAL_DNS);
884 sendto_iauth(auth->client, "d");
886 /* Hostname and mappings checked out. */
887 if (IsUserPort(auth->client))
888 sendheader(auth->client, REPORT_FIN_DNS);
889 ircd_strncpy(cli_sockhost(auth->client), h_name, HOSTLEN);
890 sendto_iauth(auth->client, "N %s", h_name);
892 check_auth_finished(auth);
895 /** Flag the client to show an attempt to contact the ident server on
896 * the client's host. Should the connect or any later phase of the
897 * identifying process fail, it is aborted and the user is given a
898 * username of "unknown".
899 * @param[in] auth The request for which to start the ident lookup.
901 static void start_auth_query(struct AuthRequest* auth)
903 struct irc_sockaddr remote_addr;
904 struct irc_sockaddr local_addr;
909 assert(0 != auth->client);
912 * get the local address of the client and bind to that to
913 * make the auth request. This used to be done only for
914 * ifdef VIRTUAL_HOST, but needs to be done for all clients
915 * since the ident request must originate from that same address--
916 * and machines with multiple IP addresses are common now
918 memcpy(&local_addr, &auth->local, sizeof(local_addr));
920 memcpy(&remote_addr.addr, &cli_ip(auth->client), sizeof(remote_addr.addr));
921 remote_addr.port = 113;
922 fd = os_socket(&local_addr, SOCK_STREAM, "auth query", 0);
924 ++ServerStats->is_abad;
925 if (IsUserPort(auth->client))
926 sendheader(auth->client, REPORT_FAIL_ID);
929 if (IsUserPort(auth->client))
930 sendheader(auth->client, REPORT_DO_ID);
932 if ((result = os_connect_nonb(fd, &remote_addr)) == IO_FAILURE ||
933 !socket_add(&auth->socket, auth_sock_callback, (void*) auth,
934 result == IO_SUCCESS ? SS_CONNECTED : SS_CONNECTING,
935 SOCK_EVENT_READABLE, fd)) {
936 ++ServerStats->is_abad;
937 if (IsUserPort(auth->client))
938 sendheader(auth->client, REPORT_FAIL_ID);
943 FlagSet(&auth->flags, AR_AUTH_PENDING);
944 if (result == IO_SUCCESS)
945 send_auth_query(auth);
948 /** Initiate DNS lookup for a client.
949 * @param[in] auth The auth request for which to start the DNS lookup.
951 static void start_dns_query(struct AuthRequest *auth)
953 if (feature_bool(FEAT_NODNS)) {
954 sendto_iauth(auth->client, "d");
958 if (irc_in_addr_is_loopback(&cli_ip(auth->client))) {
959 strcpy(cli_sockhost(auth->client), cli_name(&me));
960 sendto_iauth(auth->client, "N %s", cli_sockhost(auth->client));
964 if (IsUserPort(auth->client))
965 sendheader(auth->client, REPORT_DO_DNS);
967 FlagSet(&auth->flags, AR_DNS_PENDING);
968 gethost_byaddr(&cli_ip(auth->client), auth_dns_callback, auth);
971 /** Initiate IAuth check for a client.
972 * @param[in] auth The auth request for which to star the IAuth check.
974 static void start_iauth_query(struct AuthRequest *auth)
976 FlagSet(&auth->flags, AR_IAUTH_PENDING);
977 if (!sendto_iauth(auth->client, "C %s %hu %s %hu",
978 cli_sock_ip(auth->client), auth->port,
979 ircd_ntoa(&auth->local.addr), auth->local.port))
980 FlagClr(&auth->flags, AR_IAUTH_PENDING);
983 /** Starts auth (identd) and dns queries for a client.
984 * @param[in] client The client for which to start queries.
986 void start_auth(struct Client* client)
988 struct irc_sockaddr remote;
989 struct AuthRequest* auth;
992 Debug((DEBUG_INFO, "Beginning auth request on client %p", client));
994 /* Register with event handlers. */
995 cli_lasttime(client) = CurrentTime;
996 cli_since(client) = CurrentTime;
997 if (cli_fd(client) > HighestFd)
998 HighestFd = cli_fd(client);
999 LocalClientArray[cli_fd(client)] = client;
1000 socket_events(&(cli_socket(client)), SOCK_ACTION_SET | SOCK_EVENT_READABLE);
1002 /* Allocate the AuthRequest. */
1003 auth = auth_freelist;
1005 auth_freelist = auth->next;
1007 auth = MyMalloc(sizeof(*auth));
1009 memset(auth, 0, sizeof(*auth));
1010 auth->client = client;
1011 cli_auth(client) = auth;
1012 s_fd(&auth->socket) = -1;
1013 timer_add(timer_init(&auth->timeout), auth_timeout_callback, (void*) auth,
1014 TT_RELATIVE, feature_int(FEAT_AUTH_TIMEOUT));
1016 /* Try to get socket endpoint addresses. */
1017 if (!os_get_sockname(cli_fd(client), &auth->local)
1018 || !os_get_peername(cli_fd(client), &remote)) {
1019 ++ServerStats->is_abad;
1020 if (IsUserPort(auth->client))
1021 sendheader(auth->client, REPORT_FAIL_ID);
1022 exit_client(auth->client, auth->client, &me, "Socket local/peer lookup failed");
1025 auth->port = remote.port;
1027 /* Set required client inputs for users. */
1028 if (IsUserPort(client)) {
1029 cli_user(client) = make_user(client);
1030 cli_user(client)->server = &me;
1031 FlagSet(&auth->flags, AR_NEEDS_USER);
1032 FlagSet(&auth->flags, AR_NEEDS_NICK);
1034 /* Try to start iauth lookup. */
1035 start_iauth_query(auth);
1038 /* Try to start DNS lookup. */
1039 start_dns_query(auth);
1041 /* Try to start ident lookup. */
1042 start_auth_query(auth);
1044 /* Add client to GlobalClientList. */
1045 add_client_to_list(client);
1047 /* Check which auth events remain pending. */
1048 check_auth_finished(auth);
1051 /** Mark that a user has PONGed while unregistered.
1052 * @param[in] auth Authorization request for client.
1053 * @param[in] cookie PONG cookie value sent by client.
1054 * @return Zero if client should be kept, CPTR_KILLED if rejected.
1056 int auth_set_pong(struct AuthRequest *auth, unsigned int cookie)
1058 assert(auth != NULL);
1059 if (!FlagHas(&auth->flags, AR_NEEDS_PONG))
1061 if (cookie != auth->cookie)
1063 send_reply(auth->client, SND_EXPLICIT | ERR_BADPING,
1064 ":To connect, type /QUOTE PONG %u", auth->cookie);
1067 cli_lasttime(auth->client) = CurrentTime;
1068 FlagClr(&auth->flags, AR_NEEDS_PONG);
1069 return check_auth_finished(auth);
1072 /** Record a user's claimed username and userinfo.
1073 * @param[in] auth Authorization request for client.
1074 * @param[in] username Client's asserted username.
1075 * @param[in] hostname Third argument of USER command (client's
1076 * hostname, per RFC 1459).
1077 * @param[in] servername Fourth argument of USER command (server's
1078 * name, per RFC 1459).
1079 * @param[in] userinfo Client's asserted self-description.
1080 * @return Zero if client should be kept, CPTR_KILLED if rejected.
1082 int auth_set_user(struct AuthRequest *auth, const char *username, const char *hostname, const char *servername, const char *userinfo)
1084 struct Client *cptr;
1086 assert(auth != NULL);
1087 if (FlagHas(&auth->flags, AR_IAUTH_HURRY))
1089 FlagClr(&auth->flags, AR_NEEDS_USER);
1090 cptr = auth->client;
1091 ircd_strncpy(cli_info(cptr), userinfo, REALLEN);
1092 ircd_strncpy(cli_user(cptr)->username, username, USERLEN);
1093 ircd_strncpy(cli_user(cptr)->host, cli_sockhost(cptr), HOSTLEN);
1094 if (IAuthHas(iauth, IAUTH_UNDERNET))
1095 sendto_iauth(cptr, "U %s %s %s :%s", username, hostname, servername, userinfo);
1096 else if (IAuthHas(iauth, IAUTH_ADDLINFO))
1097 sendto_iauth(cptr, "U %s", username);
1098 return check_auth_finished(auth);
1101 /** Handle authorization-related aspects of initial nickname selection.
1102 * This is called after verifying that the nickname is available.
1103 * @param[in] auth Authorization request for client.
1104 * @param[in] nickname Client's requested nickname.
1105 * @return Zero if client should be kept, CPTR_KILLED if rejected.
1107 int auth_set_nick(struct AuthRequest *auth, const char *nickname)
1109 assert(auth != NULL);
1110 FlagClr(&auth->flags, AR_NEEDS_NICK);
1112 * If the client hasn't gotten a cookie-ping yet,
1113 * choose a cookie and send it. -record!jegelhof@cloud9.net
1115 if (!auth->cookie) {
1117 auth->cookie = ircrandom();
1118 } while (!auth->cookie);
1119 sendrawto_one(auth->client, "PING :%u", auth->cookie);
1120 FlagSet(&auth->flags, AR_NEEDS_PONG);
1122 if (IAuthHas(iauth, IAUTH_UNDERNET))
1123 sendto_iauth(auth->client, "n %s", nickname);
1124 return check_auth_finished(auth);
1127 /** Record a user's password.
1128 * @param[in] auth Authorization request for client.
1129 * @param[in] password Client's password.
1130 * @return Zero if client should be kept, CPTR_KILLED if rejected.
1132 int auth_set_password(struct AuthRequest *auth, const char *password)
1134 assert(auth != NULL);
1135 if (IAuthHas(iauth, IAUTH_ADDLINFO))
1136 sendto_iauth(auth->client, "P :%s", password);
1140 /** Send exit notification for \a cptr to iauth.
1141 * @param[in] cptr Client who is exiting.
1143 void auth_send_exit(struct Client *cptr)
1145 sendto_iauth(cptr, "D");
1148 /** Forward an XREPLY on to iauth.
1149 * @param[in] sptr Source of the XREPLY.
1150 * @param[in] routing Routing information for the original XQUERY.
1151 * @param[in] reply Contents of the reply.
1153 void auth_send_xreply(struct Client *sptr, const char *routing,
1156 sendto_iauth(NULL, "X %#C %s :%s", sptr, routing, reply);
1159 /** Mark that a user has started capabilities negotiation.
1160 * This blocks authorization until auth_cap_done() is called.
1161 * @param[in] auth Authorization request for client.
1162 * @return Zero if client should be kept, CPTR_KILLED if rejected.
1164 int auth_cap_start(struct AuthRequest *auth)
1166 assert(auth != NULL);
1167 FlagSet(&auth->flags, AR_CAP_PENDING);
1171 /** Mark that a user has completed capabilities negotiation.
1172 * This unblocks authorization if auth_cap_start() was called.
1173 * @param[in] auth Authorization request for client.
1174 * @return Zero if client should be kept, CPTR_KILLED if rejected.
1176 int auth_cap_done(struct AuthRequest *auth)
1178 assert(auth != NULL);
1179 FlagClr(&auth->flags, AR_CAP_PENDING);
1180 return check_auth_finished(auth);
1183 /** Attempt to spawn the process for an IAuth instance.
1184 * @param[in] iauth IAuth descriptor.
1185 * @param[in] automatic If non-zero, apply sanity checks against
1186 * excessive automatic restarts.
1187 * @return 0 on success, non-zero on failure.
1189 int iauth_do_spawn(struct IAuth *iauth, int automatic)
1196 if (automatic && CurrentTime - iauth->started < 5)
1198 sendto_opmask_butone(NULL, SNO_AUTH, "IAuth crashed fast, leaving it dead.");
1202 /* Record time we tried to spawn the iauth process. */
1203 iauth->started = CurrentTime;
1205 /* Attempt to allocate a pair of sockets. */
1206 res = os_socketpair(s_io);
1209 Debug((DEBUG_INFO, "Unable to create IAuth socketpair: %s", strerror(res)));
1213 /* Mark the parent's side of the pair (element 0) as non-blocking. */
1214 res = os_set_nonblocking(s_io[0]);
1217 Debug((DEBUG_INFO, "Unable to make IAuth socket non-blocking: %s", strerror(res)));
1223 /* Initialize the socket structure to talk to the child. */
1224 res = socket_add(i_socket(iauth), iauth_sock_callback, iauth,
1225 SS_CONNECTED, SOCK_EVENT_READABLE, s_io[0]);
1228 Debug((DEBUG_INFO, "Unable to register IAuth socket: %s", strerror(res)));
1234 /* Allocate another pair for stderr. */
1235 res = os_socketpair(s_err);
1238 Debug((DEBUG_INFO, "Unable to create IAuth stderr: %s", strerror(res)));
1239 socket_del(i_socket(iauth));
1245 /* Mark parent side of this pair non-blocking, too. */
1246 res = os_set_nonblocking(s_err[0]);
1249 Debug((DEBUG_INFO, "Unable to make IAuth stderr non-blocking: %s", strerror(res)));
1252 socket_del(i_socket(iauth));
1258 /* And set up i_stderr(iauth). */
1259 res = socket_add(i_stderr(iauth), iauth_stderr_callback, iauth,
1260 SS_CONNECTED, SOCK_EVENT_READABLE, s_err[0]);
1263 Debug((DEBUG_INFO, "Unable to register IAuth stderr: %s", strerror(res)));
1266 socket_del(i_socket(iauth));
1272 /* Attempt to fork a child process. */
1275 /* Error forking the child, still in parent. */
1277 Debug((DEBUG_INFO, "Unable to fork IAuth child: %s", strerror(res)));
1278 socket_del(i_stderr(iauth));
1281 socket_del(i_socket(iauth));
1288 /* We are the parent process. Close the child's sockets. */
1291 /* Send our server name (supposedly for proxy checking purposes)
1292 * and maximum number of connections (for allocation hints).
1293 * Need to use conf_get_local() since &me may not be fully
1294 * initialized the first time we run.
1296 sendto_iauth(NULL, "M %s %d", conf_get_local()->name, MAXCONNECTIONS);
1297 /* Indicate success (until the child dies). */
1301 /* We are the child process.
1302 * Duplicate our end of the socket to stdin, stdout and stderr.
1303 * Then close all the higher-numbered FDs and exec the process.
1305 if (dup2(s_io[1], 0) == 0
1306 && dup2(s_io[1], 1) == 1
1307 && dup2(s_err[1], 2) == 2) {
1308 close_connections(0);
1309 execvp(iauth->i_argv[0], iauth->i_argv);
1312 /* If we got here, something was seriously wrong. */
1316 /** See if an %IAuth program must be spawned.
1317 * If a process is already running with the specified options, keep it.
1318 * Otherwise spawn a new child process to perform the %IAuth function.
1319 * @param[in] argc Number of parameters to use when starting process.
1320 * @param[in] argv Array of parameters to start process.
1321 * @return 0 on failure, 1 on new process, 2 on reuse of existing process.
1323 int auth_spawn(int argc, char *argv[])
1330 /* Check that incoming arguments all match pre-existing arguments. */
1331 for (ii = 0; same && (ii < argc); ++ii) {
1332 if (NULL == iauth->i_argv[ii]
1333 || 0 != strcmp(iauth->i_argv[ii], argv[ii]))
1336 /* Check that we have no more pre-existing arguments. */
1337 if (same && iauth->i_argv[ii])
1339 /* If they are the same and still connected, clear the "closing" flag and exit. */
1340 if (same && i_GetConnected(iauth)) {
1341 Debug((DEBUG_INFO, "Reusing existing IAuth process"));
1342 IAuthClr(iauth, IAUTH_CLOSING);
1345 auth_close_unused();
1348 /* Need to initialize a new connection. */
1349 iauth = MyCalloc(1, sizeof(*iauth));
1350 msgq_init(i_sendQ(iauth));
1351 /* Populate iauth's argv array. */
1352 iauth->i_argv = MyCalloc(argc + 1, sizeof(iauth->i_argv[0]));
1353 for (ii = 0; ii < argc; ++ii)
1354 DupString(iauth->i_argv[ii], argv[ii]);
1355 iauth->i_argv[ii] = NULL;
1356 /* Try to spawn it, and handle the results. */
1357 if (iauth_do_spawn(iauth, 0))
1359 IAuthClr(iauth, IAUTH_CLOSING);
1363 /** Mark all %IAuth connections as closing. */
1364 void auth_mark_closing(void)
1367 IAuthSet(iauth, IAUTH_CLOSING);
1370 /** Complete disconnection of an %IAuth connection.
1371 * @param[in] iauth %Connection to fully close.
1373 static void iauth_disconnect(struct IAuth *iauth)
1378 /* Close error socket. */
1379 if (s_fd(i_stderr(iauth)) != -1) {
1380 close(s_fd(i_stderr(iauth)));
1381 socket_del(i_stderr(iauth));
1382 s_fd(i_stderr(iauth)) = -1;
1385 /* Close main socket. */
1386 if (s_fd(i_socket(iauth)) != -1) {
1387 close(s_fd(i_socket(iauth)));
1388 socket_del(i_socket(iauth));
1389 s_fd(i_socket(iauth)) = -1;
1393 /** Close all %IAuth connections marked as closing. */
1394 void auth_close_unused(void)
1396 if (IAuthHas(iauth, IAUTH_CLOSING)) {
1398 iauth_disconnect(iauth);
1399 if (iauth->i_argv) {
1400 for (ii = 0; iauth->i_argv[ii]; ++ii)
1401 MyFree(iauth->i_argv[ii]);
1402 MyFree(iauth->i_argv);
1408 /** Send queued output to \a iauth.
1409 * @param[in] iauth Writable connection with queued data.
1411 static void iauth_write(struct IAuth *iauth)
1413 unsigned int bytes_tried, bytes_sent;
1416 if (IAuthHas(iauth, IAUTH_BLOCKED))
1418 while (MsgQLength(i_sendQ(iauth)) > 0) {
1419 iores = os_sendv_nonb(s_fd(i_socket(iauth)), i_sendQ(iauth), &bytes_tried, &bytes_sent);
1422 msgq_delete(i_sendQ(iauth), bytes_sent);
1423 iauth->i_sendB += bytes_sent;
1424 if (bytes_tried == bytes_sent)
1426 /* If bytes_sent < bytes_tried, fall through to IO_BLOCKED. */
1428 IAuthSet(iauth, IAUTH_BLOCKED);
1429 socket_events(i_socket(iauth), SOCK_ACTION_ADD | SOCK_EVENT_WRITABLE);
1432 iauth_disconnect(iauth);
1436 /* We were able to flush all events, so remove notification. */
1437 socket_events(i_socket(iauth), SOCK_ACTION_DEL | SOCK_EVENT_WRITABLE);
1440 /** Send a message to iauth.
1441 * @param[in] cptr Optional client context for message.
1442 * @param[in] format Format string for message.
1443 * @return Non-zero on successful send or buffering, zero on failure.
1445 static int sendto_iauth(struct Client *cptr, const char *format, ...)
1450 /* Do not send requests when we have no iauth. */
1451 if (!i_GetConnected(iauth))
1453 /* Do not send for clients in the NORMAL state. */
1455 && (format[0] != 'D')
1456 && (!cli_auth(cptr) || !FlagHas(&cli_auth(cptr)->flags, AR_IAUTH_PENDING)))
1459 /* Build the message buffer. */
1460 vd.vd_format = format;
1461 va_start(vd.vd_args, format);
1463 mb = msgq_make(NULL, "-1 %v", &vd);
1465 mb = msgq_make(NULL, "%d %v", cli_fd(cptr), &vd);
1468 /* Tack it onto the iauth sendq and try to write it. */
1470 msgq_add(i_sendQ(iauth), mb, 0);
1476 /** Send text to interested operators (SNO_AUTH server notice).
1477 * @param[in] iauth Active IAuth session.
1478 * @param[in] cli Client referenced by command.
1479 * @param[in] parc Number of parameters (1).
1480 * @param[in] params Text to send.
1483 static int iauth_cmd_snotice(struct IAuth *iauth, struct Client *cli,
1484 int parc, char **params)
1486 sendto_opmask_butone(NULL, SNO_AUTH, "%s", params[0]);
1490 /** Set the debug level for the session.
1491 * @param[in] iauth Active IAuth session.
1492 * @param[in] cli Client referenced by command.
1493 * @param[in] parc Number of parameters (1).
1494 * @param[in] params String starting with an integer.
1497 static int iauth_cmd_debuglevel(struct IAuth *iauth, struct Client *cli,
1498 int parc, char **params)
1502 new_level = parc > 0 ? atoi(params[0]) : 0;
1503 if (i_debug(iauth) > 0 || new_level > 0) {
1504 /* The "ia_dbg" name is borrowed from (IRCnet) ircd. */
1505 sendto_opmask_butone(NULL, SNO_AUTH, "ia_dbg = %d", new_level);
1507 i_debug(iauth) = new_level;
1511 /** Set policy options for the session.
1512 * Old policy is forgotten, and any of the following characters in \a
1513 * params enable the corresponding policy:
1514 * \li A IAUTH_ADDLINFO
1515 * \li R IAUTH_REQUIRED
1516 * \li T IAUTH_TIMEOUT
1517 * \li W IAUTH_EXTRAWAIT
1518 * \li U IAUTH_UNDERNET
1520 * @param[in] iauth Active IAuth session.
1521 * @param[in] cli Client referenced by command.
1522 * @param[in] parc Number of parameters (1).
1523 * @param[in] params Zero or more policy options.
1526 static int iauth_cmd_policy(struct IAuth *iauth, struct Client *cli,
1527 int parc, char **params)
1529 enum IAuthFlag flag;
1532 /* Erase old policy first. */
1533 for (flag = IAUTH_FIRST_OPTION; flag < IAUTH_LAST_FLAG; ++flag)
1534 IAuthClr(iauth, flag);
1536 if (parc > 0) /* only try to parse if we were given a policy string */
1537 /* Parse new policy set. */
1538 for (p = params[0]; *p; p++) switch (*p) {
1539 case 'A': IAuthSet(iauth, IAUTH_ADDLINFO); break;
1540 case 'R': IAuthSet(iauth, IAUTH_REQUIRED); break;
1541 case 'T': IAuthSet(iauth, IAUTH_TIMEOUT); break;
1542 case 'W': IAuthSet(iauth, IAUTH_EXTRAWAIT); break;
1543 case 'U': IAuthSet(iauth, IAUTH_UNDERNET); break;
1546 /* Optionally notify operators. */
1547 if (i_debug(iauth) > 0)
1548 sendto_opmask_butone(NULL, SNO_AUTH, "iauth options: %s", params[0]);
1552 /** Set the iauth program version number.
1553 * @param[in] iauth Active IAuth session.
1554 * @param[in] cli Client referenced by command.
1555 * @param[in] parc Number of parameters (1).
1556 * @param[in] params Version number or name.
1559 static int iauth_cmd_version(struct IAuth *iauth, struct Client *cli,
1560 int parc, char **params)
1562 MyFree(iauth->i_version);
1563 DupString(iauth->i_version, parc > 0 ? params[0] : "<NONE>");
1564 sendto_opmask_butone(NULL, SNO_AUTH, "iauth version %s running.",
1569 /** Paste a parameter list together into a single string.
1570 * @param[in] parc Number of parameters.
1571 * @param[in] params Parameter list to paste together.
1572 * @return Pasted parameter list.
1574 static char *paste_params(int parc, char **params)
1577 int len = 0, lengths[MAXPARA], i;
1579 /* Compute the length... */
1580 for (i = 0; i < parc; i++)
1581 len += lengths[i] = strlen(params[i]);
1583 /* Allocate memory, accounting for string lengths, spaces (parc - 1), a
1584 * sentinel, and the trailing \0
1586 str = MyMalloc(len + parc + 1);
1588 /* Build the pasted string */
1589 for (tmp = str, i = 0; i < parc; i++) {
1590 if (i) /* add space separator... */
1592 if (i == parc - 1) /* add colon sentinel */
1595 /* Copy string component... */
1596 memcpy(tmp, params[i], lengths[i]);
1597 tmp += lengths[i]; /* move to end of string */
1600 /* terminate the string... */
1603 return str; /* return the pasted string */
1606 /** Clear cached iauth configuration information.
1607 * @param[in] iauth Active IAuth session.
1608 * @param[in] cli Client referenced by command.
1609 * @param[in] parc Number of parameters (0).
1610 * @param[in] params Parameter list (ignored).
1613 static int iauth_cmd_newconfig(struct IAuth *iauth, struct Client *cli,
1614 int parc, char **params)
1619 head = iauth->i_config;
1620 iauth->i_config = NULL;
1621 for (; head; head = next) {
1623 MyFree(head->value.cp);
1626 sendto_opmask_butone(NULL, SNO_AUTH, "New iauth configuration.");
1630 /** Append iauth configuration information.
1631 * @param[in] iauth Active IAuth session.
1632 * @param[in] cli Client referenced by command.
1633 * @param[in] parc Number of parameters.
1634 * @param[in] params Description of configuration element.
1637 static int iauth_cmd_config(struct IAuth *iauth, struct Client *cli,
1638 int parc, char **params)
1642 if (iauth->i_config) {
1643 for (node = iauth->i_config; node->next; node = node->next) ;
1644 node = node->next = make_link();
1646 node = iauth->i_config = make_link();
1648 node->value.cp = paste_params(parc, params);
1649 node->next = 0; /* must be explicitly cleared */
1653 /** Clear cached iauth configuration information.
1654 * @param[in] iauth Active IAuth session.
1655 * @param[in] cli Client referenced by command.
1656 * @param[in] parc Number of parameters (0).
1657 * @param[in] params Parameter list (ignored).
1660 static int iauth_cmd_newstats(struct IAuth *iauth, struct Client *cli,
1661 int parc, char **params)
1666 head = iauth->i_stats;
1667 iauth->i_stats = NULL;
1668 for (; head; head = next) {
1670 MyFree(head->value.cp);
1673 sendto_opmask_butone(NULL, SNO_AUTH, "New iauth statistics.");
1677 /** Append iauth statistics information.
1678 * @param[in] iauth Active IAuth session.
1679 * @param[in] cli Client referenced by command.
1680 * @param[in] parc Number of parameters.
1681 * @param[in] params Statistics element.
1684 static int iauth_cmd_stats(struct IAuth *iauth, struct Client *cli,
1685 int parc, char **params)
1688 if (iauth->i_stats) {
1689 for (node = iauth->i_stats; node->next; node = node->next) ;
1690 node = node->next = make_link();
1692 node = iauth->i_stats = make_link();
1694 node->value.cp = paste_params(parc, params);
1695 node->next = 0; /* must be explicitly cleared */
1699 /** Set client's username to a trusted string even if it breaks the rules.
1700 * @param[in] iauth Active IAuth session.
1701 * @param[in] cli Client referenced by command.
1702 * @param[in] parc Number of parameters (1).
1703 * @param[in] params Forced username.
1706 static int iauth_cmd_username_forced(struct IAuth *iauth, struct Client *cli,
1707 int parc, char **params)
1709 assert(cli_auth(cli) != NULL);
1710 FlagClr(&cli_auth(cli)->flags, AR_AUTH_PENDING);
1711 if (!EmptyString(params[0])) {
1712 ircd_strncpy(cli_username(cli), params[0], USERLEN);
1714 FlagSet(&cli_auth(cli)->flags, AR_IAUTH_USERNAME);
1715 FlagSet(&cli_auth(cli)->flags, AR_IAUTH_FUSERNAME);
1720 /** Set client's username to a trusted string.
1721 * @param[in] iauth Active IAuth session.
1722 * @param[in] cli Client referenced by command.
1723 * @param[in] parc Number of parameters (1).
1724 * @param[in] params Trusted username.
1727 static int iauth_cmd_username_good(struct IAuth *iauth, struct Client *cli,
1728 int parc, char **params)
1730 assert(cli_auth(cli) != NULL);
1731 FlagClr(&cli_auth(cli)->flags, AR_AUTH_PENDING);
1732 if (!EmptyString(params[0])) {
1733 ircd_strncpy(cli_username(cli), params[0], USERLEN);
1735 FlagSet(&cli_auth(cli)->flags, AR_IAUTH_USERNAME);
1740 /** Set client's username to an untrusted string.
1741 * @param[in] iauth Active IAuth session.
1742 * @param[in] cli Client referenced by command.
1743 * @param[in] parc Number of parameters (1).
1744 * @param[in] params Untrusted username.
1747 static int iauth_cmd_username_bad(struct IAuth *iauth, struct Client *cli,
1748 int parc, char **params)
1750 assert(cli_auth(cli) != NULL);
1751 FlagClr(&cli_auth(cli)->flags, AR_AUTH_PENDING);
1752 if (!EmptyString(params[0]))
1753 ircd_strncpy(cli_user(cli)->username, params[0], USERLEN);
1757 /** Set client's hostname.
1758 * @param[in] iauth Active IAuth session.
1759 * @param[in] cli Client referenced by command.
1760 * @param[in] parc Number of parameters (1).
1761 * @param[in] params New hostname for client.
1762 * @return Non-zero if \a cli authorization should be checked for completion.
1764 static int iauth_cmd_hostname(struct IAuth *iauth, struct Client *cli,
1765 int parc, char **params)
1767 struct AuthRequest *auth;
1769 if (EmptyString(params[0])) {
1770 sendto_iauth(cli, "E Missing :Missing hostname parameter");
1774 auth = cli_auth(cli);
1775 assert(auth != NULL);
1777 /* If a DNS request is pending, abort it. */
1778 if (FlagHas(&auth->flags, AR_DNS_PENDING)) {
1779 FlagClr(&auth->flags, AR_DNS_PENDING);
1780 delete_resolver_queries(auth);
1781 if (IsUserPort(cli))
1782 sendheader(cli, REPORT_FIN_DNS);
1784 /* Set hostname from params. */
1785 ircd_strncpy(cli_sockhost(cli), params[0], HOSTLEN);
1786 /* If we have gotten here, the user is in a "hurry" state and has
1787 * been pre-registered. Their hostname was set during that, and
1788 * needs to be overwritten now.
1790 if (FlagHas(&auth->flags, AR_IAUTH_HURRY)) {
1791 ircd_strncpy(cli_user(cli)->host, cli_sockhost(cli), HOSTLEN);
1792 ircd_strncpy(cli_user(cli)->realhost, cli_sockhost(cli), HOSTLEN);
1797 /** Set client's IP address.
1798 * @param[in] iauth Active IAuth session.
1799 * @param[in] cli Client referenced by command.
1800 * @param[in] parc Number of parameters (1).
1801 * @param[in] params New IP address for client in dotted quad or
1802 * standard IPv6 format.
1805 static int iauth_cmd_ip_address(struct IAuth *iauth, struct Client *cli,
1806 int parc, char **params)
1808 struct irc_in_addr addr;
1809 struct AuthRequest *auth;
1811 if (EmptyString(params[0])) {
1812 sendto_iauth(cli, "E Missing :Missing IP address parameter");
1816 /* Get AuthRequest for client. */
1817 auth = cli_auth(cli);
1818 assert(auth != NULL);
1820 /* Parse the client's new IP address. */
1821 if (!ircd_aton(&addr, params[0])) {
1822 sendto_iauth(cli, "E Invalid :Unable to parse IP address [%s]", params[0]);
1826 /* If this is the first IP override, save the client's original
1827 * address in case we get a DNS response later.
1829 if (!irc_in_addr_valid(&auth->original))
1830 memcpy(&auth->original, &cli_ip(cli), sizeof(auth->original));
1832 /* Undo original IP connection in IPcheck. */
1833 IPcheck_connect_fail(cli, 1);
1834 ClearIPChecked(cli);
1836 /* Update the IP and charge them as a remote connect. */
1837 memcpy(&cli_ip(cli), &addr, sizeof(cli_ip(cli)));
1838 IPcheck_remote_connect(cli, 0);
1843 /** Find a ConfItem structure for a named connection class.
1844 * @param[in] class_name Name of configuration class to find.
1845 * @return A ConfItem of type CONF_CLIENT for the class, or NULL on failure.
1847 static struct ConfItem *auth_find_class_conf(const char *class_name)
1849 static struct ConfItem *aconf_list;
1850 struct ConnectionClass *class;
1851 struct ConfItem *aconf;
1853 /* Make sure the configuration class is valid. */
1854 class = find_class(class_name);
1855 if (!class || !class->valid)
1858 /* Look for an existing ConfItem for the class. */
1859 for (aconf = aconf_list; aconf; aconf = aconf->next)
1860 if (aconf->conn_class == class)
1863 /* If no ConfItem, create one. */
1865 aconf = make_conf(CONF_CLIENT);
1867 sendto_opmask_butone(NULL, SNO_AUTH,
1868 "Unable to allocate ConfItem for class %s!",
1872 /* make_conf() "helpfully" links the conf into GlobalConfList,
1873 * which we do not want, so undo that. (Ugh.)
1875 if (aconf == GlobalConfList) {
1876 GlobalConfList = aconf->next;
1878 /* Back to business as usual. */
1879 aconf->conn_class = class;
1880 aconf->next = aconf_list;
1887 /** Tentatively accept a client in IAuth.
1888 * @param[in] iauth Active IAuth session.
1889 * @param[in] cli Client referenced by command.
1890 * @param[in] parc Number of parameters.
1891 * @param[in] params Optional class name for client.
1892 * @return Negative (CPTR_KILLED) if the connection is refused, one otherwise.
1894 static int iauth_cmd_soft_done(struct IAuth *iauth, struct Client *cli,
1895 int parc, char **params)
1897 /* Clear iauth pending flag. */
1898 assert(cli_auth(cli) != NULL);
1899 FlagSet(&cli_auth(cli)->flags, AR_IAUTH_SOFT_DONE);
1903 /** Accept a client in IAuth.
1904 * @param[in] iauth Active IAuth session.
1905 * @param[in] cli Client referenced by command.
1906 * @param[in] parc Number of parameters.
1907 * @param[in] params Optional class name for client.
1908 * @return Negative (CPTR_KILLED) if the connection is refused, one otherwise.
1910 static int iauth_cmd_done_client(struct IAuth *iauth, struct Client *cli,
1911 int parc, char **params)
1913 static time_t warn_time;
1915 /* Clear iauth pending flag. */
1916 assert(cli_auth(cli) != NULL);
1917 FlagClr(&cli_auth(cli)->flags, AR_IAUTH_PENDING);
1919 /* If a connection class was specified (and usable), assign the client to it. */
1920 if (!EmptyString(params[0])) {
1921 struct ConfItem *aconf;
1923 aconf = auth_find_class_conf(params[0]);
1925 enum AuthorizationCheckResult acr;
1927 acr = attach_conf(cli, aconf);
1930 /* There should maybe be some way to set FLAG_DOID here.. */
1932 case ACR_TOO_MANY_IN_CLASS:
1933 ++ServerStats->is_ref;
1934 return exit_client(cli, cli, &me,
1935 "Sorry, your connection class is full - try "
1936 "again later or try another server");
1938 log_write(LS_IAUTH, L_ERROR, 0, "IAuth: Unexpected AuthorizationCheckResult %d from attach_conf()", acr);
1942 sendto_opmask_butone_ratelimited(NULL, SNO_AUTH, &warn_time,
1943 "iauth tried to use undefined class [%s]",
1950 /** Accept a client in IAuth and assign them to an account.
1951 * @param[in] iauth Active IAuth session.
1952 * @param[in] cli Client referenced by command.
1953 * @param[in] parc Number of parameters.
1954 * @param[in] params Account name and optional class name for client.
1955 * @return Negative if the connection is refused, otherwise non-zero
1956 * if \a cli authorization should be checked for completion.
1958 static int iauth_cmd_done_account(struct IAuth *iauth, struct Client *cli,
1959 int parc, char **params)
1964 if (EmptyString(params[0])) {
1965 sendto_iauth(cli, "E Missing :Missing account parameter");
1968 /* Check length of account name. */
1969 len = strcspn(params[0], ": ");
1970 if (len > ACCOUNTLEN) {
1971 sendto_iauth(cli, "E Invalid :Account parameter too long");
1974 /* If account has a creation timestamp, use it. */
1975 assert(cli_user(cli) != NULL);
1976 if (params[0][len] == ':') {
1977 cli_user(cli)->acc_create = strtoul(params[0] + len + 1, NULL, 10);
1978 params[0][len] = '\0';
1981 /* Copy account name to User structure. */
1982 ircd_strncpy(cli_user(cli)->account, params[0], ACCOUNTLEN);
1985 /* Fall through to the normal "done" handler. */
1986 return iauth_cmd_done_client(iauth, cli, parc - 1, params + 1);
1989 /** Reject a client's connection.
1990 * @param[in] iauth Active IAuth session.
1991 * @param[in] cli Client referenced by command.
1992 * @param[in] parc Number of parameters (1).
1993 * @param[in] params Optional kill message.
1996 static int iauth_cmd_kill(struct IAuth *iauth, struct Client *cli,
1997 int parc, char **params)
2000 FlagClr(&cli_auth(cli)->flags, AR_IAUTH_PENDING);
2001 if (EmptyString(params[0]))
2002 params[0] = "Access denied";
2003 exit_client(cli, cli, &me, params[0]);
2007 /** Change a client's usermode.
2008 * @param[in] iauth Active IAuth session.
2009 * @param[in] cli Client referenced by command.
2010 * @param[in] parc Number of parameters (at least one).
2011 * @param[in] params Usermode arguments for client (with the first
2012 * starting with '+').
2015 static int iauth_cmd_usermode(struct IAuth *iauth, struct Client *cli,
2016 int parc, char **params)
2018 if (params[0][0] == '+')
2020 set_user_mode(cli, cli, parc + 2, params - 2, ALLOWMODES_ANY);
2026 /** Send a challenge string to the client.
2027 * @param[in] iauth Active IAuth session.
2028 * @param[in] cli Client referenced by command.
2029 * @param[in] parc Number of parameters (1).
2030 * @param[in] params Challenge message for client.
2033 static int iauth_cmd_challenge(struct IAuth *iauth, struct Client *cli,
2034 int parc, char **params)
2036 if (!EmptyString(params[0]))
2037 sendrawto_one(cli, "NOTICE AUTH :*** %s", params[0]);
2041 /** Send an extension query to a specified remote server.
2042 * @param[in] iauth Active IAuth session.
2043 * @param[in] cli Client referenced by command.
2044 * @param[in] parc Number of parameters (3).
2045 * @param[in] params Remote server, routing information, and query.
2048 static int iauth_cmd_xquery(struct IAuth *iauth, struct Client *cli,
2049 int parc, char **params)
2052 const char *routing;
2054 struct Client *acptr;
2056 /* Process parameters */
2057 if (EmptyString(params[0])) {
2058 sendto_iauth(cli, "E Missing :Missing server parameter");
2063 if (EmptyString(params[1])) {
2064 sendto_iauth(cli, "E Missing :Missing routing parameter");
2067 routing = params[1];
2069 if (EmptyString(params[2])) {
2070 sendto_iauth(cli, "E Missing :Missing query parameter");
2075 /* Try to find the specified server */
2076 if (!(acptr = find_match_server(serv))) {
2077 sendto_iauth(cli, "x %s %s :Server not online", serv, routing);
2081 /* If it's to us, do nothing; otherwise, forward the query */
2083 /* The "iauth:" prefix helps ircu route the reply to iauth */
2084 sendcmdto_one(&me, CMD_XQUERY, acptr, "%C iauth:%s :%s", acptr, routing,
2090 /** Parse a \a message from \a iauth.
2091 * @param[in] iauth Active IAuth session.
2092 * @param[in] message Message to be parsed.
2094 static void iauth_parse(struct IAuth *iauth, char *message)
2096 char *params[MAXPARA + 1]; /* leave space for NULL */
2098 iauth_cmd_handler handler;
2099 struct AuthRequest *auth;
2104 /* Find command handler... */
2105 switch (*(message++)) {
2106 case '>': handler = iauth_cmd_snotice; has_cli = 0; break;
2107 case 'G': handler = iauth_cmd_debuglevel; has_cli = 0; break;
2108 case 'O': handler = iauth_cmd_policy; has_cli = 0; break;
2109 case 'V': handler = iauth_cmd_version; has_cli = 0; break;
2110 case 'a': handler = iauth_cmd_newconfig; has_cli = 0; break;
2111 case 'A': handler = iauth_cmd_config; has_cli = 0; break;
2112 case 's': handler = iauth_cmd_newstats; has_cli = 0; break;
2113 case 'S': handler = iauth_cmd_stats; has_cli = 0; break;
2114 case 'X': handler = iauth_cmd_xquery; has_cli = 0; break;
2115 case 'o': handler = iauth_cmd_username_forced; has_cli = 1; break;
2116 case 'U': handler = iauth_cmd_username_good; has_cli = 1; break;
2117 case 'u': handler = iauth_cmd_username_bad; has_cli = 1; break;
2118 case 'N': handler = iauth_cmd_hostname; has_cli = 1; break;
2119 case 'I': handler = iauth_cmd_ip_address; has_cli = 1; break;
2120 case 'M': handler = iauth_cmd_usermode; has_cli = 1; break;
2121 case 'C': handler = iauth_cmd_challenge; has_cli = 1; break;
2122 case 'd': handler = iauth_cmd_soft_done; has_cli = 1; break;
2123 case 'D': handler = iauth_cmd_done_client; has_cli = 1; break;
2124 case 'R': handler = iauth_cmd_done_account; has_cli = 1; break;
2125 case 'k': /* The 'k' command indicates the user should be booted
2126 * off without telling opers. There is no way to
2127 * signal that to exit_client(), so we fall through to
2128 * the case that we do implement.
2130 case 'K': handler = iauth_cmd_kill; has_cli = 2; break;
2131 case 'r': /* we handle termination directly */ return;
2132 default: sendto_iauth(NULL, "E Garbage :[%s]", message); return;
2135 while (parc < MAXPARA) {
2136 while (IsSpace(*message)) /* skip leading whitespace */
2139 if (!*message) /* hit the end of the string, break out */
2142 if (*message == ':') { /* found sentinel... */
2143 params[parc++] = message + 1;
2144 break; /* it's the last parameter anyway */
2147 params[parc++] = message; /* save the parameter */
2148 while (*message && !IsSpace(*message))
2149 message++; /* find the end of the parameter */
2151 if (*message) /* terminate the parameter */
2152 *(message++) = '\0';
2155 params[parc] = NULL; /* terminate the parameter list */
2157 /* Check to see if the command specifies a client... */
2159 /* Handler does not need a client. */
2160 handler(iauth, NULL, parc, params);
2162 /* Try to find the client associated with the request. */
2163 id = strtol(params[0], NULL, 10);
2165 sendto_iauth(NULL, "E Missing :Need <id> <ip> <port>");
2166 else if (id < 0 || id > HighestFd || !(cli = LocalClientArray[id]))
2167 /* Client no longer exists (or never existed). */
2168 sendto_iauth(NULL, "E Gone :[%s %s %s]", params[0], params[1],
2170 else if ((!(auth = cli_auth(cli)) ||
2171 !FlagHas(&auth->flags, AR_IAUTH_PENDING)) &&
2173 /* Client is done with IAuth checks. */
2174 sendto_iauth(cli, "E Done :[%s %s %s]", params[0], params[1], params[2]);
2176 struct irc_sockaddr addr;
2179 /* Parse IP address and port number from parameters */
2180 res = ipmask_parse(params[1], &addr.addr, NULL);
2181 addr.port = strtol(params[2], NULL, 10);
2183 /* Check IP address and port number against expected. */
2185 irc_in_addr_cmp(&addr.addr, &cli_ip(cli)) ||
2186 (auth && addr.port != auth->port))
2187 /* Report mismatch to iauth. */
2188 sendto_iauth(cli, "E Mismatch :[%s] != [%s]", params[1],
2189 ircd_ntoa(&cli_ip(cli)));
2190 else if (handler(iauth, cli, parc - 3, params + 3) > 0)
2191 /* Handler indicated a possible state change. */
2192 check_auth_finished(auth);
2197 /** Read input from \a iauth.
2198 * Reads up to SERVER_TCP_WINDOW bytes per pass.
2199 * @param[in] iauth Readable connection.
2201 static void iauth_read(struct IAuth *iauth)
2203 static char readbuf[SERVER_TCP_WINDOW];
2204 unsigned int length, count;
2208 /* Copy partial data to readbuf, append new data. */
2209 length = iauth->i_count;
2210 memcpy(readbuf, iauth->i_buffer, length);
2211 if (IO_SUCCESS != os_recv_nonb(s_fd(i_socket(iauth)),
2213 sizeof(readbuf) - length - 1,
2216 readbuf[length += count] = '\0';
2218 /* Parse each complete line. */
2219 for (sol = readbuf; (eol = strchr(sol, '\n')) != NULL; sol = eol + 1) {
2221 if (*(eol - 1) == '\r') /* take out carriage returns, too... */
2224 /* If spammy debug, send the message to opers. */
2225 if (i_debug(iauth) > 1)
2226 sendto_opmask_butone(NULL, SNO_AUTH, "Parsing: \"%s\"", sol);
2228 /* Parse the line... */
2229 iauth_parse(iauth, sol);
2232 /* Put unused data back into connection's buffer. */
2233 iauth->i_count = strlen(sol);
2234 if (iauth->i_count > BUFSIZE)
2235 iauth->i_count = BUFSIZE;
2236 memcpy(iauth->i_buffer, sol, iauth->i_count);
2239 /** Handle socket activity for an %IAuth connection.
2240 * @param[in] ev &Socket event; the IAuth connection is the user data
2241 * pointer for the socket.
2243 static void iauth_sock_callback(struct Event *ev)
2245 struct IAuth *iauth;
2247 assert(0 != ev_socket(ev));
2248 iauth = (struct IAuth*) s_data(ev_socket(ev));
2251 switch (ev_type(ev)) {
2253 if (!IAuthHas(iauth, IAUTH_CLOSING) && !s_active(i_stderr(iauth)))
2254 iauth_do_spawn(iauth, 1);
2260 IAuthClr(iauth, IAUTH_BLOCKED);
2264 log_write(LS_IAUTH, L_ERROR, 0, "IAuth socket error: %s", strerror(ev_data(ev)));
2265 /* and fall through to the ET_EOF case */
2267 iauth_disconnect(iauth);
2270 assert(0 && "Unrecognized event type");
2275 /** Read error input from \a iauth.
2276 * @param[in] iauth Readable connection.
2278 static void iauth_read_stderr(struct IAuth *iauth)
2280 static char readbuf[SERVER_TCP_WINDOW];
2281 unsigned int length, count;
2285 /* Copy partial data to readbuf, append new data. */
2286 length = iauth->i_errcount;
2287 memcpy(readbuf, iauth->i_errbuf, length);
2288 if (IO_SUCCESS != os_recv_nonb(s_fd(i_stderr(iauth)),
2290 sizeof(readbuf) - length - 1,
2293 readbuf[length += count] = '\0';
2295 /* Send each complete line to SNO_AUTH. */
2296 for (sol = readbuf; (eol = strchr(sol, '\n')) != NULL; sol = eol + 1) {
2298 if (*(eol - 1) == '\r') /* take out carriage returns, too... */
2300 Debug((DEBUG_ERROR, "IAuth error: %s", sol));
2301 log_write(LS_IAUTH, L_ERROR, 0, "IAuth error: %s", sol);
2302 sendto_opmask_butone(NULL, SNO_AUTH, "%s", sol);
2305 /* Put unused data back into connection's buffer. */
2306 iauth->i_errcount = strlen(sol);
2307 if (iauth->i_errcount > BUFSIZE)
2308 iauth->i_errcount = BUFSIZE;
2309 memcpy(iauth->i_errbuf, sol, iauth->i_errcount);
2312 /** Handle error socket activity for an %IAuth connection.
2313 * @param[in] ev &Socket event; the IAuth connection is the user data
2314 * pointer for the socket.
2316 static void iauth_stderr_callback(struct Event *ev)
2318 struct IAuth *iauth;
2320 assert(0 != ev_socket(ev));
2321 iauth = (struct IAuth*) s_data(ev_socket(ev));
2324 switch (ev_type(ev)) {
2326 if (!IAuthHas(iauth, IAUTH_CLOSING) && !s_active(i_socket(iauth)))
2327 iauth_do_spawn(iauth, 1);
2330 iauth_read_stderr(iauth);
2333 log_write(LS_IAUTH, L_ERROR, 0, "IAuth stderr error: %s", strerror(ev_data(ev)));
2334 /* and fall through to the ET_EOF case */
2336 iauth_disconnect(iauth);
2339 assert(0 && "Unrecognized event type");
2344 /** Report active iauth's configuration to \a cptr.
2345 * @param[in] cptr Client requesting statistics.
2346 * @param[in] sd Stats descriptor for request.
2347 * @param[in] param Extra parameter from user (may be NULL).
2349 void report_iauth_conf(struct Client *cptr, const struct StatDesc *sd, char *param)
2353 if (iauth) for (link = iauth->i_config; link; link = link->next)
2355 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":%s",
2360 /** Report active iauth's statistics to \a cptr.
2361 * @param[in] cptr Client requesting statistics.
2362 * @param[in] sd Stats descriptor for request.
2363 * @param[in] param Extra parameter from user (may be NULL).
2365 void report_iauth_stats(struct Client *cptr, const struct StatDesc *sd, char *param)
2369 if (iauth) for (link = iauth->i_stats; link; link = link->next)
2371 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":%s",