2 * ssld.c: The ircd-ratbox ssl/zlib helper daemon thingy
3 * Copyright (C) 2007 Aaron Sethman <androsyn@ratbox.org>
4 * Copyright (C) 2007 ircd-ratbox development team
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
33 #define READBUF_SIZE 16384
36 static void setup_signals(void);
39 static inline uint32_t
40 buf_to_uint32(uint8_t *buf
)
43 memcpy(&x
, buf
, sizeof(x
));
48 uint32_to_buf(uint8_t *buf
, uint32_t x
)
50 memcpy(buf
, &x
, sizeof(x
));
54 static char inbuf
[READBUF_SIZE
];
56 static char outbuf
[READBUF_SIZE
];
59 typedef struct _mod_ctl_buf
64 rb_fde_t
*F
[MAXPASSFD
];
68 typedef struct _mod_ctl
78 static mod_ctl_t
*mod_ctl
;
82 typedef struct _zlib_stream
93 rawbuf_head_t
*modbuf_out
;
94 rawbuf_head_t
*plainbuf_out
;
100 unsigned long long mod_out
;
101 unsigned long long mod_in
;
102 unsigned long long plain_in
;
103 unsigned long long plain_out
;
108 #define FLAG_SSL 0x01
109 #define FLAG_ZIP 0x02
110 #define FLAG_CORK 0x04
111 #define FLAG_DEAD 0x08
112 #define FLAG_SSL_W_WANTS_R 0x10 /* output needs to wait until input possible */
113 #define FLAG_SSL_R_WANTS_W 0x20 /* input needs to wait until output possible */
114 #define FLAG_ZIPSSL 0x40
116 #define IsSSL(x) ((x)->flags & FLAG_SSL)
117 #define IsZip(x) ((x)->flags & FLAG_ZIP)
118 #define IsCork(x) ((x)->flags & FLAG_CORK)
119 #define IsDead(x) ((x)->flags & FLAG_DEAD)
120 #define IsSSLWWantsR(x) ((x)->flags & FLAG_SSL_W_WANTS_R)
121 #define IsSSLRWantsW(x) ((x)->flags & FLAG_SSL_R_WANTS_W)
122 #define IsZipSSL(x) ((x)->flags & FLAG_ZIPSSL)
124 #define SetSSL(x) ((x)->flags |= FLAG_SSL)
125 #define SetZip(x) ((x)->flags |= FLAG_ZIP)
126 #define SetCork(x) ((x)->flags |= FLAG_CORK)
127 #define SetDead(x) ((x)->flags |= FLAG_DEAD)
128 #define SetSSLWWantsR(x) ((x)->flags |= FLAG_SSL_W_WANTS_R)
129 #define SetSSLRWantsW(x) ((x)->flags |= FLAG_SSL_R_WANTS_W)
130 #define SetZipSSL(x) ((x)->flags |= FLAG_ZIPSSL)
132 #define ClearSSL(x) ((x)->flags &= ~FLAG_SSL)
133 #define ClearZip(x) ((x)->flags &= ~FLAG_ZIP)
134 #define ClearCork(x) ((x)->flags &= ~FLAG_CORK)
135 #define ClearDead(x) ((x)->flags &= ~FLAG_DEAD)
136 #define ClearSSLWWantsR(x) ((x)->flags &= ~FLAG_SSL_W_WANTS_R)
137 #define ClearSSLRWantsW(x) ((x)->flags &= ~FLAG_SSL_R_WANTS_W)
138 #define ClearZipSSL(x) ((x)->flags &= ~FLAG_ZIPSSL)
141 #define WAIT_PLAIN 0x1
143 #define HASH_WALK_SAFE(i, max, ptr, next, table) for(i = 0; i < max; i++) { RB_DLINK_FOREACH_SAFE(ptr, next, table[i].head)
144 #define HASH_WALK_END }
145 #define CONN_HASH_SIZE 2000
146 #define connid_hash(x) (&connid_hash_table[(x % CONN_HASH_SIZE)])
150 static rb_dlink_list connid_hash_table
[CONN_HASH_SIZE
];
151 static rb_dlink_list dead_list
;
153 static void conn_mod_read_cb(rb_fde_t
*fd
, void *data
);
154 static void conn_mod_write_sendq(rb_fde_t
*, void *data
);
155 static void conn_plain_write_sendq(rb_fde_t
*, void *data
);
156 static void mod_write_ctl(rb_fde_t
*, void *data
);
157 static void conn_plain_read_cb(rb_fde_t
*fd
, void *data
);
158 static void conn_plain_read_shutdown_cb(rb_fde_t
*fd
, void *data
);
159 static void mod_cmd_write_queue(mod_ctl_t
* ctl
, const void *data
, size_t len
);
160 static const char *remote_closed
= "Remote host closed the connection";
162 static int certfp_method
= RB_SSL_CERTFP_METH_SHA1
;
164 static int zlib_ok
= 1;
166 static int zlib_ok
= 0;
172 ssld_alloc(void *unused
, size_t count
, size_t size
)
174 return rb_malloc(count
* size
);
178 ssld_free(void *unused
, void *ptr
)
185 conn_find_by_id(uint32_t id
)
190 RB_DLINK_FOREACH(ptr
, (connid_hash(id
))->head
)
193 if(conn
->id
== id
&& !IsDead(conn
))
200 conn_add_id_hash(conn_t
* conn
, uint32_t id
)
203 rb_dlinkAdd(conn
, &conn
->node
, connid_hash(id
));
207 free_conn(conn_t
* conn
)
209 rb_free_rawbuffer(conn
->modbuf_out
);
210 rb_free_rawbuffer(conn
->plainbuf_out
);
214 zlib_stream_t
*stream
= conn
->stream
;
215 inflateEnd(&stream
->instream
);
216 deflateEnd(&stream
->outstream
);
223 clean_dead_conns(void *unused
)
226 rb_dlink_node
*ptr
, *next
;
227 RB_DLINK_FOREACH_SAFE(ptr
, next
, dead_list
.head
)
232 dead_list
.tail
= dead_list
.head
= NULL
;
237 close_conn(conn_t
* conn
, int wait_plain
, const char *fmt
, ...)
240 char reason
[128]; /* must always be under 250 bytes */
246 rb_rawbuf_flush(conn
->modbuf_out
, conn
->mod_fd
);
247 rb_rawbuf_flush(conn
->plainbuf_out
, conn
->plain_fd
);
248 rb_close(conn
->mod_fd
);
252 rb_dlinkDelete(&conn
->node
, connid_hash(conn
->id
));
254 if(!wait_plain
|| fmt
== NULL
)
256 rb_close(conn
->plain_fd
);
257 rb_dlinkAdd(conn
, &conn
->node
, &dead_list
);
260 rb_setselect(conn
->plain_fd
, RB_SELECT_READ
, conn_plain_read_shutdown_cb
, conn
);
261 rb_setselect(conn
->plain_fd
, RB_SELECT_WRITE
, NULL
, NULL
);
263 rb_vsnprintf(reason
, sizeof(reason
), fmt
, ap
);
267 uint32_to_buf(&buf
[1], conn
->id
);
268 rb_strlcpy((char *) &buf
[5], reason
, sizeof(buf
) - 5);
269 len
= (strlen(reason
) + 1) + 5;
270 mod_cmd_write_queue(conn
->ctl
, buf
, len
);
274 make_conn(mod_ctl_t
* ctl
, rb_fde_t
*mod_fd
, rb_fde_t
*plain_fd
)
276 conn_t
*conn
= rb_malloc(sizeof(conn_t
));
278 conn
->modbuf_out
= rb_new_rawbuffer();
279 conn
->plainbuf_out
= rb_new_rawbuffer();
280 conn
->mod_fd
= mod_fd
;
281 conn
->plain_fd
= plain_fd
;
290 check_handshake_flood(void *unused
)
293 rb_dlink_node
*ptr
, *next
;
296 HASH_WALK_SAFE(i
, CONN_HASH_SIZE
, ptr
, next
, connid_hash_table
)
302 count
= rb_ssl_handshake_count(conn
->mod_fd
);
303 /* nothing needs to do this more than twice in ten seconds i don't think */
305 close_conn(conn
, WAIT_PLAIN
, "Handshake flooding");
307 rb_ssl_clear_handshake_count(conn
->mod_fd
);
312 conn_mod_write_sendq(rb_fde_t
*fd
, void *data
)
320 if(IsSSLWWantsR(conn
))
322 ClearSSLWWantsR(conn
);
323 conn_mod_read_cb(conn
->mod_fd
, conn
);
328 while((retlen
= rb_rawbuf_flush(conn
->modbuf_out
, fd
)) > 0)
329 conn
->mod_out
+= retlen
;
331 if(retlen
== 0 || (retlen
< 0 && !rb_ignore_errno(errno
)))
334 close_conn(conn
, WAIT_PLAIN
, "%s", remote_closed
);
335 if(IsSSL(conn
) && retlen
== RB_RW_SSL_ERROR
)
336 err
= rb_get_ssl_strerror(conn
->mod_fd
);
338 err
= strerror(errno
);
339 close_conn(conn
, WAIT_PLAIN
, "Write error: %s", err
);
342 if(rb_rawbuf_length(conn
->modbuf_out
) > 0)
344 if(retlen
!= RB_RW_SSL_NEED_READ
)
345 rb_setselect(conn
->mod_fd
, RB_SELECT_WRITE
, conn_mod_write_sendq
, conn
);
348 rb_setselect(conn
->mod_fd
, RB_SELECT_READ
, conn_mod_write_sendq
, conn
);
349 rb_setselect(conn
->mod_fd
, RB_SELECT_WRITE
, NULL
, NULL
);
354 rb_setselect(conn
->mod_fd
, RB_SELECT_WRITE
, NULL
, NULL
);
356 if(IsCork(conn
) && rb_rawbuf_length(conn
->modbuf_out
) == 0)
359 conn_plain_read_cb(conn
->plain_fd
, conn
);
365 conn_mod_write(conn_t
* conn
, void *data
, size_t len
)
367 if(IsDead(conn
)) /* no point in queueing to a dead man */
369 rb_rawbuf_append(conn
->modbuf_out
, data
, len
);
373 conn_plain_write(conn_t
* conn
, void *data
, size_t len
)
375 if(IsDead(conn
)) /* again no point in queueing to dead men */
377 rb_rawbuf_append(conn
->plainbuf_out
, data
, len
);
381 mod_cmd_write_queue(mod_ctl_t
* ctl
, const void *data
, size_t len
)
383 mod_ctl_buf_t
*ctl_buf
;
384 ctl_buf
= rb_malloc(sizeof(mod_ctl_buf_t
));
385 ctl_buf
->buf
= rb_malloc(len
);
386 ctl_buf
->buflen
= len
;
387 memcpy(ctl_buf
->buf
, data
, len
);
389 rb_dlinkAddTail(ctl_buf
, &ctl_buf
->node
, &ctl
->writeq
);
390 mod_write_ctl(ctl
->F
, ctl
);
395 common_zlib_deflate(conn_t
* conn
, void *buf
, size_t len
)
398 z_stream
*outstream
= &((zlib_stream_t
*) conn
->stream
)->outstream
;
399 outstream
->next_in
= buf
;
400 outstream
->avail_in
= len
;
401 outstream
->next_out
= (Bytef
*) outbuf
;
402 outstream
->avail_out
= sizeof(outbuf
);
404 ret
= deflate(outstream
, Z_SYNC_FLUSH
);
408 close_conn(conn
, WAIT_PLAIN
, "Deflate failed: %s", zError(ret
));
411 if(outstream
->avail_out
== 0)
413 /* avail_out empty */
414 close_conn(conn
, WAIT_PLAIN
, "error compressing data, avail_out == 0");
417 if(outstream
->avail_in
!= 0)
419 /* avail_in isn't empty... */
420 close_conn(conn
, WAIT_PLAIN
, "error compressing data, avail_in != 0");
423 have
= sizeof(outbuf
) - outstream
->avail_out
;
424 conn_mod_write(conn
, outbuf
, have
);
428 common_zlib_inflate(conn_t
* conn
, void *buf
, size_t len
)
431 ((zlib_stream_t
*) conn
->stream
)->instream
.next_in
= buf
;
432 ((zlib_stream_t
*) conn
->stream
)->instream
.avail_in
= len
;
433 ((zlib_stream_t
*) conn
->stream
)->instream
.next_out
= (Bytef
*) outbuf
;
434 ((zlib_stream_t
*) conn
->stream
)->instream
.avail_out
= sizeof(outbuf
);
436 while(((zlib_stream_t
*) conn
->stream
)->instream
.avail_in
)
438 ret
= inflate(&((zlib_stream_t
*) conn
->stream
)->instream
, Z_NO_FLUSH
);
441 if(!strncmp("ERROR ", buf
, 6))
443 close_conn(conn
, WAIT_PLAIN
, "Received uncompressed ERROR");
446 close_conn(conn
, WAIT_PLAIN
, "Inflate failed: %s", zError(ret
));
449 have
= sizeof(outbuf
) - ((zlib_stream_t
*) conn
->stream
)->instream
.avail_out
;
451 if(((zlib_stream_t
*) conn
->stream
)->instream
.avail_in
)
453 conn_plain_write(conn
, outbuf
, have
);
455 ((zlib_stream_t
*) conn
->stream
)->instream
.next_out
= (Bytef
*) outbuf
;
456 ((zlib_stream_t
*) conn
->stream
)->instream
.avail_out
= sizeof(outbuf
);
462 conn_plain_write(conn
, outbuf
, have
);
467 plain_check_cork(conn_t
* conn
)
469 if(rb_rawbuf_length(conn
->modbuf_out
) >= 4096)
471 /* if we have over 4k pending outbound, don't read until
472 * we've cleared the queue */
474 rb_setselect(conn
->plain_fd
, RB_SELECT_READ
, NULL
, NULL
);
476 conn_mod_write_sendq(conn
->mod_fd
, conn
);
484 conn_plain_read_cb(rb_fde_t
*fd
, void *data
)
494 if(plain_check_cork(conn
))
502 length
= rb_read(conn
->plain_fd
, inbuf
, sizeof(inbuf
));
504 if(length
== 0 || (length
< 0 && !rb_ignore_errno(errno
)))
506 close_conn(conn
, NO_WAIT
, NULL
);
512 rb_setselect(conn
->plain_fd
, RB_SELECT_READ
, conn_plain_read_cb
, conn
);
513 conn_mod_write_sendq(conn
->mod_fd
, conn
);
516 conn
->plain_in
+= length
;
520 common_zlib_deflate(conn
, inbuf
, length
);
523 conn_mod_write(conn
, inbuf
, length
);
526 if(plain_check_cork(conn
))
532 conn_plain_read_shutdown_cb(rb_fde_t
*fd
, void *data
)
542 length
= rb_read(conn
->plain_fd
, inbuf
, sizeof(inbuf
));
544 if(length
== 0 || (length
< 0 && !rb_ignore_errno(errno
)))
546 rb_close(conn
->plain_fd
);
547 rb_dlinkAdd(conn
, &conn
->node
, &dead_list
);
553 rb_setselect(conn
->plain_fd
, RB_SELECT_READ
, conn_plain_read_shutdown_cb
, conn
);
560 conn_mod_read_cb(rb_fde_t
*fd
, void *data
)
563 const char *err
= remote_closed
;
570 if(IsSSLRWantsW(conn
))
572 ClearSSLRWantsW(conn
);
573 conn_mod_write_sendq(conn
->mod_fd
, conn
);
583 length
= rb_read(conn
->mod_fd
, inbuf
, sizeof(inbuf
));
585 if(length
== 0 || (length
< 0 && !rb_ignore_errno(errno
)))
589 close_conn(conn
, WAIT_PLAIN
, "%s", remote_closed
);
593 if(IsSSL(conn
) && length
== RB_RW_SSL_ERROR
)
594 err
= rb_get_ssl_strerror(conn
->mod_fd
);
596 err
= strerror(errno
);
597 close_conn(conn
, WAIT_PLAIN
, "Read error: %s", err
);
602 if(length
!= RB_RW_SSL_NEED_WRITE
)
603 rb_setselect(conn
->mod_fd
, RB_SELECT_READ
, conn_mod_read_cb
, conn
);
606 rb_setselect(conn
->mod_fd
, RB_SELECT_READ
, NULL
, NULL
);
607 rb_setselect(conn
->mod_fd
, RB_SELECT_WRITE
, conn_mod_read_cb
, conn
);
610 conn_plain_write_sendq(conn
->plain_fd
, conn
);
613 conn
->mod_in
+= length
;
616 common_zlib_inflate(conn
, inbuf
, length
);
619 conn_plain_write(conn
, inbuf
, length
);
624 conn_plain_write_sendq(rb_fde_t
*fd
, void *data
)
632 while((retlen
= rb_rawbuf_flush(conn
->plainbuf_out
, fd
)) > 0)
634 conn
->plain_out
+= retlen
;
636 if(retlen
== 0 || (retlen
< 0 && !rb_ignore_errno(errno
)))
638 close_conn(data
, NO_WAIT
, NULL
);
643 if(rb_rawbuf_length(conn
->plainbuf_out
) > 0)
644 rb_setselect(conn
->plain_fd
, RB_SELECT_WRITE
, conn_plain_write_sendq
, conn
);
646 rb_setselect(conn
->plain_fd
, RB_SELECT_WRITE
, NULL
, NULL
);
652 #if defined(RLIMIT_NOFILE) && defined(HAVE_SYS_RESOURCE_H)
655 if(!getrlimit(RLIMIT_NOFILE
, &limit
))
657 return limit
.rlim_cur
;
659 #endif /* RLIMIT_FD_MAX */
660 return MAXCONNECTIONS
;
664 ssl_send_cipher(conn_t
*conn
)
673 p
= rb_ssl_get_cipher(conn
->mod_fd
);
678 rb_strlcpy(cstring
, p
, sizeof(cstring
));
681 uint32_to_buf(&buf
[1], conn
->id
);
682 strcpy(&buf
[5], cstring
);
683 len
= (strlen(cstring
) + 1) + 5;
684 mod_cmd_write_queue(conn
->ctl
, buf
, len
);
688 ssl_send_certfp(conn_t
*conn
)
690 uint8_t buf
[9 + RB_SSL_CERTFP_LEN
];
692 int len
= rb_get_ssl_certfp(conn
->mod_fd
, &buf
[9], certfp_method
);
696 lrb_assert(len
<= RB_SSL_CERTFP_LEN
);
698 uint32_to_buf(&buf
[1], conn
->id
);
699 uint32_to_buf(&buf
[5], len
);
700 mod_cmd_write_queue(conn
->ctl
, buf
, 9 + len
);
704 ssl_process_accept_cb(rb_fde_t
*F
, int status
, struct sockaddr
*addr
, rb_socklen_t len
, void *data
)
710 conn_mod_read_cb(conn
->mod_fd
, conn
);
711 conn_plain_read_cb(conn
->plain_fd
, conn
);
712 ssl_send_cipher(conn
);
713 ssl_send_certfp(conn
);
716 /* ircd doesn't care about the reason for this */
717 close_conn(conn
, NO_WAIT
, 0);
722 ssl_process_connect_cb(rb_fde_t
*F
, int status
, void *data
)
728 conn_mod_read_cb(conn
->mod_fd
, conn
);
729 conn_plain_read_cb(conn
->plain_fd
, conn
);
730 ssl_send_cipher(conn
);
731 ssl_send_certfp(conn
);
733 else if(status
== RB_ERR_TIMEOUT
)
734 close_conn(conn
, WAIT_PLAIN
, "SSL handshake timed out");
735 else if(status
== RB_ERROR_SSL
)
736 close_conn(conn
, WAIT_PLAIN
, "%s", rb_get_ssl_strerror(conn
->mod_fd
));
738 close_conn(conn
, WAIT_PLAIN
, "SSL handshake failed");
743 cleanup_bad_message(mod_ctl_t
* ctl
, mod_ctl_buf_t
* ctlb
)
747 /* XXX should log this somehow */
748 for (i
= 0; i
< ctlb
->nfds
; i
++)
749 rb_close(ctlb
->F
[i
]);
753 ssl_process_accept(mod_ctl_t
* ctl
, mod_ctl_buf_t
* ctlb
)
758 conn
= make_conn(ctl
, ctlb
->F
[0], ctlb
->F
[1]);
760 id
= buf_to_uint32(&ctlb
->buf
[1]);
761 conn_add_id_hash(conn
, id
);
764 if(rb_get_type(conn
->mod_fd
) & RB_FD_UNKNOWN
)
767 rb_set_type(conn
->mod_fd
, RB_FD_SOCKET
);
769 if(rb_get_type(conn
->mod_fd
) == RB_FD_UNKNOWN
)
770 rb_set_type(conn
->plain_fd
, RB_FD_SOCKET
);
772 rb_ssl_start_accepted(ctlb
->F
[0], ssl_process_accept_cb
, conn
, 10);
776 ssl_change_certfp_method(mod_ctl_t
* ctl
, mod_ctl_buf_t
* ctlb
)
778 certfp_method
= buf_to_uint32(&ctlb
->buf
[1]);
782 ssl_process_connect(mod_ctl_t
* ctl
, mod_ctl_buf_t
* ctlb
)
786 conn
= make_conn(ctl
, ctlb
->F
[0], ctlb
->F
[1]);
788 id
= buf_to_uint32(&ctlb
->buf
[1]);
789 conn_add_id_hash(conn
, id
);
792 if(rb_get_type(conn
->mod_fd
) == RB_FD_UNKNOWN
)
793 rb_set_type(conn
->mod_fd
, RB_FD_SOCKET
);
795 if(rb_get_type(conn
->mod_fd
) == RB_FD_UNKNOWN
)
796 rb_set_type(conn
->plain_fd
, RB_FD_SOCKET
);
799 rb_ssl_start_connected(ctlb
->F
[0], ssl_process_connect_cb
, conn
, 10);
803 process_stats(mod_ctl_t
* ctl
, mod_ctl_buf_t
* ctlb
)
810 id
= buf_to_uint32(&ctlb
->buf
[1]);
812 odata
= &ctlb
->buf
[5];
813 conn
= conn_find_by_id(id
);
818 rb_snprintf(outstat
, sizeof(outstat
), "S %s %llu %llu %llu %llu", odata
,
819 conn
->plain_out
, conn
->mod_in
, conn
->plain_in
, conn
->mod_out
);
824 mod_cmd_write_queue(ctl
, outstat
, strlen(outstat
) + 1); /* +1 is so we send the \0 as well */
828 change_connid(mod_ctl_t
*ctl
, mod_ctl_buf_t
*ctlb
)
830 uint32_t id
= buf_to_uint32(&ctlb
->buf
[1]);
831 uint32_t newid
= buf_to_uint32(&ctlb
->buf
[5]);
832 conn_t
*conn
= conn_find_by_id(id
);
833 rb_dlinkDelete(&conn
->node
, connid_hash(conn
->id
));
840 zlib_process(mod_ctl_t
* ctl
, mod_ctl_buf_t
* ctlb
)
844 size_t hdr
= (sizeof(uint8_t) * 2) + sizeof(uint32_t);
846 z_stream
*instream
, *outstream
;
850 conn
= make_conn(ctl
, ctlb
->F
[0], ctlb
->F
[1]);
851 if(rb_get_type(conn
->mod_fd
) == RB_FD_UNKNOWN
)
852 rb_set_type(conn
->mod_fd
, RB_FD_SOCKET
);
854 if(rb_get_type(conn
->plain_fd
) == RB_FD_UNKNOWN
)
855 rb_set_type(conn
->plain_fd
, RB_FD_SOCKET
);
857 id
= buf_to_uint32(&ctlb
->buf
[1]);
858 conn_add_id_hash(conn
, id
);
860 level
= (uint8_t)ctlb
->buf
[5];
862 recvqlen
= ctlb
->buflen
- hdr
;
863 recvq_start
= &ctlb
->buf
[6];
866 conn
->stream
= rb_malloc(sizeof(zlib_stream_t
));
867 instream
= &((zlib_stream_t
*) conn
->stream
)->instream
;
868 outstream
= &((zlib_stream_t
*) conn
->stream
)->outstream
;
870 instream
->total_in
= 0;
871 instream
->total_out
= 0;
872 instream
->zalloc
= (alloc_func
) ssld_alloc
;
873 instream
->zfree
= (free_func
) ssld_free
;
874 instream
->data_type
= Z_ASCII
;
875 inflateInit(&((zlib_stream_t
*) conn
->stream
)->instream
);
877 outstream
->total_in
= 0;
878 outstream
->total_out
= 0;
879 outstream
->zalloc
= (alloc_func
) ssld_alloc
;
880 outstream
->zfree
= (free_func
) ssld_free
;
881 outstream
->data_type
= Z_ASCII
;
884 level
= (uint8_t) Z_DEFAULT_COMPRESSION
;
886 deflateInit(&((zlib_stream_t
*) conn
->stream
)->outstream
, level
);
888 common_zlib_inflate(conn
, recvq_start
, recvqlen
);
890 conn_mod_read_cb(conn
->mod_fd
, conn
);
891 conn_plain_read_cb(conn
->plain_fd
, conn
);
898 init_prng(mod_ctl_t
* ctl
, mod_ctl_buf_t
* ctl_buf
)
901 prng_seed_t seed_type
;
903 seed_type
= (prng_seed_t
) ctl_buf
->buf
[1];
904 path
= (char *) &ctl_buf
->buf
[2];
905 rb_init_prng(path
, seed_type
);
910 ssl_new_keys(mod_ctl_t
* ctl
, mod_ctl_buf_t
* ctl_buf
)
913 char *cert
, *key
, *dhparam
;
915 buf
= (char *) &ctl_buf
->buf
[2];
917 buf
+= strlen(cert
) + 1;
919 buf
+= strlen(key
) + 1;
921 if(strlen(dhparam
) == 0)
924 if(!rb_setup_ssl_server(cert
, key
, dhparam
))
926 const char *invalid
= "I";
927 mod_cmd_write_queue(ctl
, invalid
, strlen(invalid
));
933 send_nossl_support(mod_ctl_t
* ctl
, mod_ctl_buf_t
* ctlb
)
935 static const char *nossl_cmd
= "N";
941 conn
= make_conn(ctl
, ctlb
->F
[0], ctlb
->F
[1]);
942 id
= buf_to_uint32(&ctlb
->buf
[1]);
943 conn_add_id_hash(conn
, id
);
944 close_conn(conn
, WAIT_PLAIN
, "libratbox reports no SSL/TLS support");
946 mod_cmd_write_queue(ctl
, nossl_cmd
, strlen(nossl_cmd
));
950 send_i_am_useless(mod_ctl_t
* ctl
)
952 static const char *useless
= "U";
953 mod_cmd_write_queue(ctl
, useless
, strlen(useless
));
957 send_nozlib_support(mod_ctl_t
* ctl
, mod_ctl_buf_t
* ctlb
)
959 static const char *nozlib_cmd
= "z";
964 conn
= make_conn(ctl
, ctlb
->F
[0], ctlb
->F
[1]);
965 id
= buf_to_uint32(&ctlb
->buf
[1]);
966 conn_add_id_hash(conn
, id
);
967 close_conn(conn
, WAIT_PLAIN
, "libratbox reports no zlib support");
969 mod_cmd_write_queue(ctl
, nozlib_cmd
, strlen(nozlib_cmd
));
973 mod_process_cmd_recv(mod_ctl_t
* ctl
)
975 rb_dlink_node
*ptr
, *next
;
976 mod_ctl_buf_t
*ctl_buf
;
978 RB_DLINK_FOREACH_SAFE(ptr
, next
, ctl
->readq
.head
)
982 switch (*ctl_buf
->buf
)
986 if (ctl_buf
->nfds
!= 2 || ctl_buf
->buflen
!= 5)
988 cleanup_bad_message(ctl
, ctl_buf
);
994 send_nossl_support(ctl
, ctl_buf
);
997 ssl_process_accept(ctl
, ctl_buf
);
1002 if (ctl_buf
->nfds
!= 2 || ctl_buf
->buflen
!= 5)
1004 cleanup_bad_message(ctl
, ctl_buf
);
1010 send_nossl_support(ctl
, ctl_buf
);
1013 ssl_process_connect(ctl
, ctl_buf
);
1018 if (ctl_buf
->nfds
!= 2 || ctl_buf
->buflen
!= 5)
1020 cleanup_bad_message(ctl
, ctl_buf
);
1023 ssl_change_certfp_method(ctl
, ctl_buf
);
1030 send_nossl_support(ctl
, ctl_buf
);
1033 ssl_new_keys(ctl
, ctl_buf
);
1037 init_prng(ctl
, ctl_buf
);
1041 process_stats(ctl
, ctl_buf
);
1046 change_connid(ctl
, ctl_buf
);
1053 if (ctl_buf
->nfds
!= 2 || ctl_buf
->buflen
< 6)
1055 cleanup_bad_message(ctl
, ctl_buf
);
1059 /* just zlib only */
1060 zlib_process(ctl
, ctl_buf
);
1066 send_nozlib_support(ctl
, ctl_buf
);
1072 /* Log unknown commands */
1074 rb_dlinkDelete(ptr
, &ctl
->readq
);
1075 rb_free(ctl_buf
->buf
);
1084 mod_read_ctl(rb_fde_t
*F
, void *data
)
1086 mod_ctl_buf_t
*ctl_buf
;
1087 mod_ctl_t
*ctl
= data
;
1093 ctl_buf
= rb_malloc(sizeof(mod_ctl_buf_t
));
1094 ctl_buf
->buf
= rb_malloc(READBUF_SIZE
);
1095 ctl_buf
->buflen
= READBUF_SIZE
;
1096 retlen
= rb_recv_fd_buf(ctl
->F
, ctl_buf
->buf
, ctl_buf
->buflen
, ctl_buf
->F
,
1100 rb_free(ctl_buf
->buf
);
1105 ctl_buf
->buflen
= retlen
;
1106 rb_dlinkAddTail(ctl_buf
, &ctl_buf
->node
, &ctl
->readq
);
1107 for (i
= 0; i
< MAXPASSFD
&& ctl_buf
->F
[i
] != NULL
; i
++)
1114 if(retlen
== 0 || (retlen
< 0 && !rb_ignore_errno(errno
)))
1117 mod_process_cmd_recv(ctl
);
1118 rb_setselect(ctl
->F
, RB_SELECT_READ
, mod_read_ctl
, ctl
);
1122 mod_write_ctl(rb_fde_t
*F
, void *data
)
1124 mod_ctl_t
*ctl
= data
;
1125 mod_ctl_buf_t
*ctl_buf
;
1126 rb_dlink_node
*ptr
, *next
;
1129 RB_DLINK_FOREACH_SAFE(ptr
, next
, ctl
->writeq
.head
)
1131 ctl_buf
= ptr
->data
;
1132 retlen
= rb_send_fd_buf(ctl
->F
, ctl_buf
->F
, ctl_buf
->nfds
, ctl_buf
->buf
,
1133 ctl_buf
->buflen
, ppid
);
1136 rb_dlinkDelete(ptr
, &ctl
->writeq
);
1137 for(x
= 0; x
< ctl_buf
->nfds
; x
++)
1138 rb_close(ctl_buf
->F
[x
]);
1139 rb_free(ctl_buf
->buf
);
1143 if(retlen
== 0 || (retlen
< 0 && !rb_ignore_errno(errno
)))
1147 if(rb_dlink_list_length(&ctl
->writeq
) > 0)
1148 rb_setselect(ctl
->F
, RB_SELECT_WRITE
, mod_write_ctl
, ctl
);
1153 read_pipe_ctl(rb_fde_t
*F
, void *data
)
1156 while((retlen
= rb_read(F
, inbuf
, sizeof(inbuf
))) > 0)
1158 ;; /* we don't do anything with the pipe really, just care if the other process dies.. */
1160 if(retlen
== 0 || (retlen
< 0 && !rb_ignore_errno(errno
)))
1162 rb_setselect(F
, RB_SELECT_READ
, read_pipe_ctl
, NULL
);
1167 main(int argc
, char **argv
)
1169 const char *s_ctlfd
, *s_pipe
, *s_pid
;
1170 int ctlfd
, pipefd
, x
, maxfd
;
1173 s_ctlfd
= getenv("CTL_FD");
1174 s_pipe
= getenv("CTL_PIPE");
1175 s_pid
= getenv("CTL_PPID");
1177 if(s_ctlfd
== NULL
|| s_pipe
== NULL
|| s_pid
== NULL
)
1180 "This is ircd-ratbox ssld. You know you aren't supposed to run me directly?\n");
1182 "You get an Id tag for this: $Id$\n");
1183 fprintf(stderr
, "Have a nice life\n");
1187 ctlfd
= atoi(s_ctlfd
);
1188 pipefd
= atoi(s_pipe
);
1192 for(x
= 0; x
< maxfd
; x
++)
1194 if(x
!= ctlfd
&& x
!= pipefd
&& x
> 2)
1197 x
= open("/dev/null", O_RDWR
);
1201 if(ctlfd
!= 0 && pipefd
!= 0)
1203 if(ctlfd
!= 1 && pipefd
!= 1)
1205 if(ctlfd
!= 2 && pipefd
!= 2)
1212 rb_lib_init(NULL
, NULL
, NULL
, 0, maxfd
, 1024, 4096);
1213 rb_init_rawbuffers(1024);
1214 ssl_ok
= rb_supports_ssl();
1215 mod_ctl
= rb_malloc(sizeof(mod_ctl_t
));
1216 mod_ctl
->F
= rb_open(ctlfd
, RB_FD_SOCKET
, "ircd control socket");
1217 mod_ctl
->F_pipe
= rb_open(pipefd
, RB_FD_PIPE
, "ircd pipe");
1218 rb_set_nb(mod_ctl
->F
);
1219 rb_set_nb(mod_ctl
->F_pipe
);
1220 rb_event_addish("clean_dead_conns", clean_dead_conns
, NULL
, 10);
1221 rb_event_add("check_handshake_flood", check_handshake_flood
, NULL
, 10);
1222 read_pipe_ctl(mod_ctl
->F_pipe
, NULL
);
1223 mod_read_ctl(mod_ctl
->F
, mod_ctl
);
1224 if(!zlib_ok
&& !ssl_ok
)
1226 /* this is really useless... */
1227 send_i_am_useless(mod_ctl
);
1228 /* sleep until the ircd kills us */
1229 rb_sleep(2 << 30, 0);
1234 send_nozlib_support(mod_ctl
, NULL
);
1236 send_nossl_support(mod_ctl
, NULL
);
1244 dummy_handler(int sig
)
1254 struct sigaction act
;
1257 act
.sa_handler
= SIG_IGN
;
1258 sigemptyset(&act
.sa_mask
);
1259 sigaddset(&act
.sa_mask
, SIGPIPE
);
1260 sigaddset(&act
.sa_mask
, SIGALRM
);
1262 sigaddset(&act
.sa_mask
, SIGTRAP
);
1266 sigaddset(&act
.sa_mask
, SIGWINCH
);
1267 sigaction(SIGWINCH
, &act
, 0);
1269 sigaction(SIGPIPE
, &act
, 0);
1271 sigaction(SIGTRAP
, &act
, 0);
1274 act
.sa_handler
= dummy_handler
;
1275 sigaction(SIGALRM
, &act
, 0);