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 typedef struct _mod_ctl_buf
59 rb_fde_t
*F
[MAXPASSFD
];
63 typedef struct _mod_ctl
73 static mod_ctl_t
*mod_ctl
;
77 typedef struct _zlib_stream
88 rawbuf_head_t
*modbuf_out
;
89 rawbuf_head_t
*plainbuf_out
;
103 #define FLAG_SSL 0x01
104 #define FLAG_ZIP 0x02
105 #define FLAG_CORK 0x04
106 #define FLAG_DEAD 0x08
107 #define FLAG_SSL_W_WANTS_R 0x10 /* output needs to wait until input possible */
108 #define FLAG_SSL_R_WANTS_W 0x20 /* input needs to wait until output possible */
109 #define FLAG_ZIPSSL 0x40
111 #define IsSSL(x) ((x)->flags & FLAG_SSL)
112 #define IsZip(x) ((x)->flags & FLAG_ZIP)
113 #define IsCork(x) ((x)->flags & FLAG_CORK)
114 #define IsDead(x) ((x)->flags & FLAG_DEAD)
115 #define IsSSLWWantsR(x) ((x)->flags & FLAG_SSL_W_WANTS_R)
116 #define IsSSLRWantsW(x) ((x)->flags & FLAG_SSL_R_WANTS_W)
117 #define IsZipSSL(x) ((x)->flags & FLAG_ZIPSSL)
119 #define SetSSL(x) ((x)->flags |= FLAG_SSL)
120 #define SetZip(x) ((x)->flags |= FLAG_ZIP)
121 #define SetCork(x) ((x)->flags |= FLAG_CORK)
122 #define SetDead(x) ((x)->flags |= FLAG_DEAD)
123 #define SetSSLWWantsR(x) ((x)->flags |= FLAG_SSL_W_WANTS_R)
124 #define SetSSLRWantsW(x) ((x)->flags |= FLAG_SSL_R_WANTS_W)
125 #define SetZipSSL(x) ((x)->flags |= FLAG_ZIPSSL)
127 #define ClearSSL(x) ((x)->flags &= ~FLAG_SSL)
128 #define ClearZip(x) ((x)->flags &= ~FLAG_ZIP)
129 #define ClearCork(x) ((x)->flags &= ~FLAG_CORK)
130 #define ClearDead(x) ((x)->flags &= ~FLAG_DEAD)
131 #define ClearSSLWWantsR(x) ((x)->flags &= ~FLAG_SSL_W_WANTS_R)
132 #define ClearSSLRWantsW(x) ((x)->flags &= ~FLAG_SSL_R_WANTS_W)
133 #define ClearZipSSL(x) ((x)->flags &= ~FLAG_ZIPSSL)
136 #define WAIT_PLAIN 0x1
138 #define HASH_WALK_SAFE(i, max, ptr, next, table) for(i = 0; i < max; i++) { RB_DLINK_FOREACH_SAFE(ptr, next, table[i].head)
139 #define HASH_WALK_END }
140 #define CONN_HASH_SIZE 2000
141 #define connid_hash(x) (&connid_hash_table[(x % CONN_HASH_SIZE)])
145 static rb_dlink_list connid_hash_table
[CONN_HASH_SIZE
];
146 static rb_dlink_list dead_list
;
148 static void conn_mod_read_cb(rb_fde_t
*fd
, void *data
);
149 static void conn_mod_write_sendq(rb_fde_t
*, void *data
);
150 static void conn_plain_write_sendq(rb_fde_t
*, void *data
);
151 static void mod_write_ctl(rb_fde_t
*, void *data
);
152 static void conn_plain_read_cb(rb_fde_t
*fd
, void *data
);
153 static void conn_plain_read_shutdown_cb(rb_fde_t
*fd
, void *data
);
154 static void mod_cmd_write_queue(mod_ctl_t
* ctl
, const void *data
, size_t len
);
155 static const char *remote_closed
= "Remote host closed the connection";
157 static int certfp_method
= RB_SSL_CERTFP_METH_SHA1
;
159 static int zlib_ok
= 1;
161 static int zlib_ok
= 0;
167 ssld_alloc(void *unused
, size_t count
, size_t size
)
169 return rb_malloc(count
* size
);
173 ssld_free(void *unused
, void *ptr
)
180 conn_find_by_id(uint32_t id
)
185 RB_DLINK_FOREACH(ptr
, (connid_hash(id
))->head
)
188 if(conn
->id
== id
&& !IsDead(conn
))
195 conn_add_id_hash(conn_t
* conn
, uint32_t id
)
198 rb_dlinkAdd(conn
, &conn
->node
, connid_hash(id
));
202 free_conn(conn_t
* conn
)
204 rb_free_rawbuffer(conn
->modbuf_out
);
205 rb_free_rawbuffer(conn
->plainbuf_out
);
209 zlib_stream_t
*stream
= conn
->stream
;
210 inflateEnd(&stream
->instream
);
211 deflateEnd(&stream
->outstream
);
218 clean_dead_conns(void *unused
)
221 rb_dlink_node
*ptr
, *next
;
222 RB_DLINK_FOREACH_SAFE(ptr
, next
, dead_list
.head
)
227 dead_list
.tail
= dead_list
.head
= NULL
;
232 close_conn(conn_t
* conn
, int wait_plain
, const char *fmt
, ...)
235 char reason
[128]; /* must always be under 250 bytes */
241 rb_rawbuf_flush(conn
->modbuf_out
, conn
->mod_fd
);
242 rb_rawbuf_flush(conn
->plainbuf_out
, conn
->plain_fd
);
243 rb_close(conn
->mod_fd
);
247 rb_dlinkDelete(&conn
->node
, connid_hash(conn
->id
));
249 if(!wait_plain
|| fmt
== NULL
)
251 rb_close(conn
->plain_fd
);
252 rb_dlinkAdd(conn
, &conn
->node
, &dead_list
);
255 rb_setselect(conn
->plain_fd
, RB_SELECT_READ
, conn_plain_read_shutdown_cb
, conn
);
256 rb_setselect(conn
->plain_fd
, RB_SELECT_WRITE
, NULL
, NULL
);
258 rb_vsnprintf(reason
, sizeof(reason
), fmt
, ap
);
262 uint32_to_buf(&buf
[1], conn
->id
);
263 rb_strlcpy((char *) &buf
[5], reason
, sizeof(buf
) - 5);
264 len
= (strlen(reason
) + 1) + 5;
265 mod_cmd_write_queue(conn
->ctl
, buf
, len
);
269 make_conn(mod_ctl_t
* ctl
, rb_fde_t
*mod_fd
, rb_fde_t
*plain_fd
)
271 conn_t
*conn
= rb_malloc(sizeof(conn_t
));
273 conn
->modbuf_out
= rb_new_rawbuffer();
274 conn
->plainbuf_out
= rb_new_rawbuffer();
275 conn
->mod_fd
= mod_fd
;
276 conn
->plain_fd
= plain_fd
;
285 check_handshake_flood(void *unused
)
288 rb_dlink_node
*ptr
, *next
;
291 HASH_WALK_SAFE(i
, CONN_HASH_SIZE
, ptr
, next
, connid_hash_table
)
297 count
= rb_ssl_handshake_count(conn
->mod_fd
);
298 /* nothing needs to do this more than twice in ten seconds i don't think */
300 close_conn(conn
, WAIT_PLAIN
, "Handshake flooding");
302 rb_ssl_clear_handshake_count(conn
->mod_fd
);
307 conn_mod_write_sendq(rb_fde_t
*fd
, void *data
)
315 if(IsSSLWWantsR(conn
))
317 ClearSSLWWantsR(conn
);
318 conn_mod_read_cb(conn
->mod_fd
, conn
);
323 while((retlen
= rb_rawbuf_flush(conn
->modbuf_out
, fd
)) > 0)
324 conn
->mod_out
+= retlen
;
326 if(retlen
== 0 || (retlen
< 0 && !rb_ignore_errno(errno
)))
329 close_conn(conn
, WAIT_PLAIN
, "%s", remote_closed
);
330 if(IsSSL(conn
) && retlen
== RB_RW_SSL_ERROR
)
331 err
= rb_get_ssl_strerror(conn
->mod_fd
);
333 err
= strerror(errno
);
334 close_conn(conn
, WAIT_PLAIN
, "Write error: %s", err
);
337 if(rb_rawbuf_length(conn
->modbuf_out
) > 0)
339 if(retlen
!= RB_RW_SSL_NEED_READ
)
340 rb_setselect(conn
->mod_fd
, RB_SELECT_WRITE
, conn_mod_write_sendq
, conn
);
343 rb_setselect(conn
->mod_fd
, RB_SELECT_READ
, conn_mod_write_sendq
, conn
);
344 rb_setselect(conn
->mod_fd
, RB_SELECT_WRITE
, NULL
, NULL
);
349 rb_setselect(conn
->mod_fd
, RB_SELECT_WRITE
, NULL
, NULL
);
351 if(IsCork(conn
) && rb_rawbuf_length(conn
->modbuf_out
) == 0)
354 conn_plain_read_cb(conn
->plain_fd
, conn
);
360 conn_mod_write(conn_t
* conn
, void *data
, size_t len
)
362 if(IsDead(conn
)) /* no point in queueing to a dead man */
364 rb_rawbuf_append(conn
->modbuf_out
, data
, len
);
368 conn_plain_write(conn_t
* conn
, void *data
, size_t len
)
370 if(IsDead(conn
)) /* again no point in queueing to dead men */
372 rb_rawbuf_append(conn
->plainbuf_out
, data
, len
);
376 mod_cmd_write_queue(mod_ctl_t
* ctl
, const void *data
, size_t len
)
378 mod_ctl_buf_t
*ctl_buf
;
379 ctl_buf
= rb_malloc(sizeof(mod_ctl_buf_t
));
380 ctl_buf
->buf
= rb_malloc(len
);
381 ctl_buf
->buflen
= len
;
382 memcpy(ctl_buf
->buf
, data
, len
);
384 rb_dlinkAddTail(ctl_buf
, &ctl_buf
->node
, &ctl
->writeq
);
385 mod_write_ctl(ctl
->F
, ctl
);
390 common_zlib_deflate(conn_t
* conn
, void *buf
, size_t len
)
392 char outbuf
[READBUF_SIZE
];
394 z_stream
*outstream
= &((zlib_stream_t
*) conn
->stream
)->outstream
;
395 outstream
->next_in
= buf
;
396 outstream
->avail_in
= len
;
397 outstream
->next_out
= (Bytef
*) outbuf
;
398 outstream
->avail_out
= sizeof(outbuf
);
400 ret
= deflate(outstream
, Z_SYNC_FLUSH
);
404 close_conn(conn
, WAIT_PLAIN
, "Deflate failed: %s", zError(ret
));
407 if(outstream
->avail_out
== 0)
409 /* avail_out empty */
410 close_conn(conn
, WAIT_PLAIN
, "error compressing data, avail_out == 0");
413 if(outstream
->avail_in
!= 0)
415 /* avail_in isn't empty... */
416 close_conn(conn
, WAIT_PLAIN
, "error compressing data, avail_in != 0");
419 have
= sizeof(outbuf
) - outstream
->avail_out
;
420 conn_mod_write(conn
, outbuf
, have
);
424 common_zlib_inflate(conn_t
* conn
, void *buf
, size_t len
)
426 char outbuf
[READBUF_SIZE
];
428 ((zlib_stream_t
*) conn
->stream
)->instream
.next_in
= buf
;
429 ((zlib_stream_t
*) conn
->stream
)->instream
.avail_in
= len
;
430 ((zlib_stream_t
*) conn
->stream
)->instream
.next_out
= (Bytef
*) outbuf
;
431 ((zlib_stream_t
*) conn
->stream
)->instream
.avail_out
= sizeof(outbuf
);
433 while(((zlib_stream_t
*) conn
->stream
)->instream
.avail_in
)
435 ret
= inflate(&((zlib_stream_t
*) conn
->stream
)->instream
, Z_NO_FLUSH
);
438 if(!strncmp("ERROR ", buf
, 6))
440 close_conn(conn
, WAIT_PLAIN
, "Received uncompressed ERROR");
443 close_conn(conn
, WAIT_PLAIN
, "Inflate failed: %s", zError(ret
));
446 have
= sizeof(outbuf
) - ((zlib_stream_t
*) conn
->stream
)->instream
.avail_out
;
448 if(((zlib_stream_t
*) conn
->stream
)->instream
.avail_in
)
450 conn_plain_write(conn
, outbuf
, have
);
452 ((zlib_stream_t
*) conn
->stream
)->instream
.next_out
= (Bytef
*) outbuf
;
453 ((zlib_stream_t
*) conn
->stream
)->instream
.avail_out
= sizeof(outbuf
);
459 conn_plain_write(conn
, outbuf
, have
);
464 plain_check_cork(conn_t
* conn
)
466 if(rb_rawbuf_length(conn
->modbuf_out
) >= 4096)
468 /* if we have over 4k pending outbound, don't read until
469 * we've cleared the queue */
471 rb_setselect(conn
->plain_fd
, RB_SELECT_READ
, NULL
, NULL
);
473 conn_mod_write_sendq(conn
->mod_fd
, conn
);
481 conn_plain_read_cb(rb_fde_t
*fd
, void *data
)
483 char inbuf
[READBUF_SIZE
];
492 if(plain_check_cork(conn
))
500 length
= rb_read(conn
->plain_fd
, inbuf
, sizeof(inbuf
));
502 if(length
== 0 || (length
< 0 && !rb_ignore_errno(errno
)))
504 close_conn(conn
, NO_WAIT
, NULL
);
510 rb_setselect(conn
->plain_fd
, RB_SELECT_READ
, conn_plain_read_cb
, conn
);
511 conn_mod_write_sendq(conn
->mod_fd
, conn
);
514 conn
->plain_in
+= length
;
518 common_zlib_deflate(conn
, inbuf
, length
);
521 conn_mod_write(conn
, inbuf
, length
);
524 if(plain_check_cork(conn
))
530 conn_plain_read_shutdown_cb(rb_fde_t
*fd
, void *data
)
532 char inbuf
[READBUF_SIZE
];
541 length
= rb_read(conn
->plain_fd
, inbuf
, sizeof(inbuf
));
543 if(length
== 0 || (length
< 0 && !rb_ignore_errno(errno
)))
545 rb_close(conn
->plain_fd
);
546 rb_dlinkAdd(conn
, &conn
->node
, &dead_list
);
552 rb_setselect(conn
->plain_fd
, RB_SELECT_READ
, conn_plain_read_shutdown_cb
, conn
);
559 conn_mod_read_cb(rb_fde_t
*fd
, void *data
)
561 char inbuf
[READBUF_SIZE
];
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((char *) &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
)
765 rb_set_type(conn
->mod_fd
, RB_FD_SOCKET
);
767 if(rb_get_type(conn
->plain_fd
) == RB_FD_UNKNOWN
)
768 rb_set_type(conn
->plain_fd
, RB_FD_SOCKET
);
770 rb_ssl_start_accepted(ctlb
->F
[0], ssl_process_accept_cb
, conn
, 10);
774 ssl_change_certfp_method(mod_ctl_t
* ctl
, mod_ctl_buf_t
* ctlb
)
776 certfp_method
= buf_to_uint32(&ctlb
->buf
[1]);
780 ssl_process_connect(mod_ctl_t
* ctl
, mod_ctl_buf_t
* ctlb
)
784 conn
= make_conn(ctl
, ctlb
->F
[0], ctlb
->F
[1]);
786 id
= buf_to_uint32(&ctlb
->buf
[1]);
787 conn_add_id_hash(conn
, id
);
790 if(rb_get_type(conn
->mod_fd
) == RB_FD_UNKNOWN
)
791 rb_set_type(conn
->mod_fd
, RB_FD_SOCKET
);
793 if(rb_get_type(conn
->plain_fd
) == RB_FD_UNKNOWN
)
794 rb_set_type(conn
->plain_fd
, RB_FD_SOCKET
);
797 rb_ssl_start_connected(ctlb
->F
[0], ssl_process_connect_cb
, conn
, 10);
801 process_stats(mod_ctl_t
* ctl
, mod_ctl_buf_t
* ctlb
)
808 id
= buf_to_uint32(&ctlb
->buf
[1]);
810 odata
= &ctlb
->buf
[5];
811 conn
= conn_find_by_id(id
);
816 rb_snprintf(outstat
, sizeof(outstat
), "S %s %llu %llu %llu %llu", odata
,
817 conn
->plain_out
, conn
->mod_in
, conn
->plain_in
, conn
->mod_out
);
822 mod_cmd_write_queue(ctl
, outstat
, strlen(outstat
) + 1); /* +1 is so we send the \0 as well */
826 change_connid(mod_ctl_t
*ctl
, mod_ctl_buf_t
*ctlb
)
828 uint32_t id
= buf_to_uint32(&ctlb
->buf
[1]);
829 uint32_t newid
= buf_to_uint32(&ctlb
->buf
[5]);
830 conn_t
*conn
= conn_find_by_id(id
);
831 rb_dlinkDelete(&conn
->node
, connid_hash(conn
->id
));
838 zlib_process(mod_ctl_t
* ctl
, mod_ctl_buf_t
* ctlb
)
842 size_t hdr
= (sizeof(uint8_t) * 2) + sizeof(uint32_t);
844 z_stream
*instream
, *outstream
;
848 conn
= make_conn(ctl
, ctlb
->F
[0], ctlb
->F
[1]);
849 if(rb_get_type(conn
->mod_fd
) == RB_FD_UNKNOWN
)
850 rb_set_type(conn
->mod_fd
, RB_FD_SOCKET
);
852 if(rb_get_type(conn
->plain_fd
) == RB_FD_UNKNOWN
)
853 rb_set_type(conn
->plain_fd
, RB_FD_SOCKET
);
855 id
= buf_to_uint32(&ctlb
->buf
[1]);
856 conn_add_id_hash(conn
, id
);
858 level
= (uint8_t)ctlb
->buf
[5];
860 recvqlen
= ctlb
->buflen
- hdr
;
861 recvq_start
= &ctlb
->buf
[6];
864 conn
->stream
= rb_malloc(sizeof(zlib_stream_t
));
865 instream
= &((zlib_stream_t
*) conn
->stream
)->instream
;
866 outstream
= &((zlib_stream_t
*) conn
->stream
)->outstream
;
868 instream
->total_in
= 0;
869 instream
->total_out
= 0;
870 instream
->zalloc
= (alloc_func
) ssld_alloc
;
871 instream
->zfree
= (free_func
) ssld_free
;
872 instream
->data_type
= Z_ASCII
;
873 inflateInit(&((zlib_stream_t
*) conn
->stream
)->instream
);
875 outstream
->total_in
= 0;
876 outstream
->total_out
= 0;
877 outstream
->zalloc
= (alloc_func
) ssld_alloc
;
878 outstream
->zfree
= (free_func
) ssld_free
;
879 outstream
->data_type
= Z_ASCII
;
882 level
= (uint8_t) Z_DEFAULT_COMPRESSION
;
884 deflateInit(&((zlib_stream_t
*) conn
->stream
)->outstream
, level
);
886 common_zlib_inflate(conn
, recvq_start
, recvqlen
);
888 conn_mod_read_cb(conn
->mod_fd
, conn
);
889 conn_plain_read_cb(conn
->plain_fd
, conn
);
896 init_prng(mod_ctl_t
* ctl
, mod_ctl_buf_t
* ctl_buf
)
899 prng_seed_t seed_type
;
901 seed_type
= (prng_seed_t
) ctl_buf
->buf
[1];
902 path
= (char *) &ctl_buf
->buf
[2];
903 rb_init_prng(path
, seed_type
);
908 ssl_new_keys(mod_ctl_t
* ctl
, mod_ctl_buf_t
* ctl_buf
)
911 char *cert
, *key
, *dhparam
, *cipher_list
;
913 buf
= (char *) &ctl_buf
->buf
[2];
915 buf
+= strlen(cert
) + 1;
917 buf
+= strlen(key
) + 1;
919 if(strlen(dhparam
) == 0)
921 buf
+= strlen(dhparam
) + 1;
923 if(strlen(cipher_list
) == 0)
926 if(!rb_setup_ssl_server(cert
, key
, dhparam
, cipher_list
))
928 const char *invalid
= "I";
929 mod_cmd_write_queue(ctl
, invalid
, strlen(invalid
));
935 send_nossl_support(mod_ctl_t
* ctl
, mod_ctl_buf_t
* ctlb
)
937 static const char *nossl_cmd
= "N";
943 conn
= make_conn(ctl
, ctlb
->F
[0], ctlb
->F
[1]);
944 id
= buf_to_uint32(&ctlb
->buf
[1]);
945 conn_add_id_hash(conn
, id
);
946 close_conn(conn
, WAIT_PLAIN
, "libratbox reports no SSL/TLS support");
948 mod_cmd_write_queue(ctl
, nossl_cmd
, strlen(nossl_cmd
));
952 send_i_am_useless(mod_ctl_t
* ctl
)
954 static const char *useless
= "U";
955 mod_cmd_write_queue(ctl
, useless
, strlen(useless
));
959 send_nozlib_support(mod_ctl_t
* ctl
, mod_ctl_buf_t
* ctlb
)
961 static const char *nozlib_cmd
= "z";
966 conn
= make_conn(ctl
, ctlb
->F
[0], ctlb
->F
[1]);
967 id
= buf_to_uint32(&ctlb
->buf
[1]);
968 conn_add_id_hash(conn
, id
);
969 close_conn(conn
, WAIT_PLAIN
, "libratbox reports no zlib support");
971 mod_cmd_write_queue(ctl
, nozlib_cmd
, strlen(nozlib_cmd
));
975 mod_process_cmd_recv(mod_ctl_t
* ctl
)
977 rb_dlink_node
*ptr
, *next
;
978 mod_ctl_buf_t
*ctl_buf
;
980 RB_DLINK_FOREACH_SAFE(ptr
, next
, ctl
->readq
.head
)
984 switch (*ctl_buf
->buf
)
988 if (ctl_buf
->nfds
!= 2 || ctl_buf
->buflen
!= 5)
990 cleanup_bad_message(ctl
, ctl_buf
);
996 send_nossl_support(ctl
, ctl_buf
);
999 ssl_process_accept(ctl
, ctl_buf
);
1004 if (ctl_buf
->nfds
!= 2 || ctl_buf
->buflen
!= 5)
1006 cleanup_bad_message(ctl
, ctl_buf
);
1012 send_nossl_support(ctl
, ctl_buf
);
1015 ssl_process_connect(ctl
, ctl_buf
);
1020 if (ctl_buf
->nfds
!= 2 || ctl_buf
->buflen
!= 5)
1022 cleanup_bad_message(ctl
, ctl_buf
);
1025 ssl_change_certfp_method(ctl
, ctl_buf
);
1032 send_nossl_support(ctl
, ctl_buf
);
1035 ssl_new_keys(ctl
, ctl_buf
);
1039 init_prng(ctl
, ctl_buf
);
1043 process_stats(ctl
, ctl_buf
);
1048 change_connid(ctl
, ctl_buf
);
1055 if (ctl_buf
->nfds
!= 2 || ctl_buf
->buflen
< 6)
1057 cleanup_bad_message(ctl
, ctl_buf
);
1061 /* just zlib only */
1062 zlib_process(ctl
, ctl_buf
);
1068 send_nozlib_support(ctl
, ctl_buf
);
1074 /* Log unknown commands */
1076 rb_dlinkDelete(ptr
, &ctl
->readq
);
1077 rb_free(ctl_buf
->buf
);
1086 mod_read_ctl(rb_fde_t
*F
, void *data
)
1088 mod_ctl_buf_t
*ctl_buf
;
1089 mod_ctl_t
*ctl
= data
;
1095 ctl_buf
= rb_malloc(sizeof(mod_ctl_buf_t
));
1096 ctl_buf
->buf
= rb_malloc(READBUF_SIZE
);
1097 ctl_buf
->buflen
= READBUF_SIZE
;
1098 retlen
= rb_recv_fd_buf(ctl
->F
, ctl_buf
->buf
, ctl_buf
->buflen
, ctl_buf
->F
,
1102 rb_free(ctl_buf
->buf
);
1107 ctl_buf
->buflen
= retlen
;
1108 rb_dlinkAddTail(ctl_buf
, &ctl_buf
->node
, &ctl
->readq
);
1109 for (i
= 0; i
< MAXPASSFD
&& ctl_buf
->F
[i
] != NULL
; i
++)
1116 if(retlen
== 0 || (retlen
< 0 && !rb_ignore_errno(errno
)))
1119 mod_process_cmd_recv(ctl
);
1120 rb_setselect(ctl
->F
, RB_SELECT_READ
, mod_read_ctl
, ctl
);
1124 mod_write_ctl(rb_fde_t
*F
, void *data
)
1126 mod_ctl_t
*ctl
= data
;
1127 mod_ctl_buf_t
*ctl_buf
;
1128 rb_dlink_node
*ptr
, *next
;
1131 RB_DLINK_FOREACH_SAFE(ptr
, next
, ctl
->writeq
.head
)
1133 ctl_buf
= ptr
->data
;
1134 retlen
= rb_send_fd_buf(ctl
->F
, ctl_buf
->F
, ctl_buf
->nfds
, ctl_buf
->buf
,
1135 ctl_buf
->buflen
, ppid
);
1138 rb_dlinkDelete(ptr
, &ctl
->writeq
);
1139 for(x
= 0; x
< ctl_buf
->nfds
; x
++)
1140 rb_close(ctl_buf
->F
[x
]);
1141 rb_free(ctl_buf
->buf
);
1145 if(retlen
== 0 || (retlen
< 0 && !rb_ignore_errno(errno
)))
1149 if(rb_dlink_list_length(&ctl
->writeq
) > 0)
1150 rb_setselect(ctl
->F
, RB_SELECT_WRITE
, mod_write_ctl
, ctl
);
1155 read_pipe_ctl(rb_fde_t
*F
, void *data
)
1157 char inbuf
[READBUF_SIZE
];
1159 while((retlen
= rb_read(F
, inbuf
, sizeof(inbuf
))) > 0)
1161 ;; /* we don't do anything with the pipe really, just care if the other process dies.. */
1163 if(retlen
== 0 || (retlen
< 0 && !rb_ignore_errno(errno
)))
1165 rb_setselect(F
, RB_SELECT_READ
, read_pipe_ctl
, NULL
);
1170 main(int argc
, char **argv
)
1172 const char *s_ctlfd
, *s_pipe
, *s_pid
;
1173 int ctlfd
, pipefd
, x
, maxfd
;
1176 s_ctlfd
= getenv("CTL_FD");
1177 s_pipe
= getenv("CTL_PIPE");
1178 s_pid
= getenv("CTL_PPID");
1180 if(s_ctlfd
== NULL
|| s_pipe
== NULL
|| s_pid
== NULL
)
1183 "This is ircd-ratbox ssld. You know you aren't supposed to run me directly?\n");
1185 "You get an Id tag for this: $Id$\n");
1186 fprintf(stderr
, "Have a nice life\n");
1190 ctlfd
= atoi(s_ctlfd
);
1191 pipefd
= atoi(s_pipe
);
1195 for(x
= 0; x
< maxfd
; x
++)
1197 if(x
!= ctlfd
&& x
!= pipefd
&& x
> 2)
1200 x
= open("/dev/null", O_RDWR
);
1204 if(ctlfd
!= 0 && pipefd
!= 0)
1206 if(ctlfd
!= 1 && pipefd
!= 1)
1208 if(ctlfd
!= 2 && pipefd
!= 2)
1215 rb_lib_init(NULL
, NULL
, NULL
, 0, maxfd
, 1024, 4096);
1216 rb_init_rawbuffers(1024);
1217 ssl_ok
= rb_supports_ssl();
1218 mod_ctl
= rb_malloc(sizeof(mod_ctl_t
));
1219 mod_ctl
->F
= rb_open(ctlfd
, RB_FD_SOCKET
, "ircd control socket");
1220 mod_ctl
->F_pipe
= rb_open(pipefd
, RB_FD_PIPE
, "ircd pipe");
1221 rb_set_nb(mod_ctl
->F
);
1222 rb_set_nb(mod_ctl
->F_pipe
);
1223 rb_event_addish("clean_dead_conns", clean_dead_conns
, NULL
, 10);
1224 rb_event_add("check_handshake_flood", check_handshake_flood
, NULL
, 10);
1225 read_pipe_ctl(mod_ctl
->F_pipe
, NULL
);
1226 mod_read_ctl(mod_ctl
->F
, mod_ctl
);
1227 if(!zlib_ok
&& !ssl_ok
)
1229 /* this is really useless... */
1230 send_i_am_useless(mod_ctl
);
1231 /* sleep until the ircd kills us */
1232 rb_sleep(2 << 30, 0);
1237 send_nozlib_support(mod_ctl
, NULL
);
1239 send_nossl_support(mod_ctl
, NULL
);
1247 dummy_handler(int sig
)
1257 struct sigaction act
;
1260 act
.sa_handler
= SIG_IGN
;
1261 sigemptyset(&act
.sa_mask
);
1262 sigaddset(&act
.sa_mask
, SIGPIPE
);
1263 sigaddset(&act
.sa_mask
, SIGALRM
);
1265 sigaddset(&act
.sa_mask
, SIGTRAP
);
1269 sigaddset(&act
.sa_mask
, SIGWINCH
);
1270 sigaction(SIGWINCH
, &act
, 0);
1272 sigaction(SIGPIPE
, &act
, 0);
1274 sigaction(SIGTRAP
, &act
, 0);
1277 act
.sa_handler
= dummy_handler
;
1278 sigaction(SIGALRM
, &act
, 0);