5 * Admin interface for configuration
7 * (c) 2001 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Trivial IP Encryption (TrIPE).
14 * TrIPE is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * TrIPE is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with TrIPE; if not, write to the Free Software Foundation,
26 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 /*----- Header files ------------------------------------------------------*/
33 /*----- Global variables --------------------------------------------------*/
37 const trace_opt tr_opts
[] = {
38 { 't', T_TUNNEL
, "tunnel events" },
39 { 'r', T_PEER
, "peer events" },
40 { 'a', T_ADMIN
, "admin interface" },
41 { 'p', T_PACKET
, "packet contents" },
42 { 'c', T_CRYPTO
, "crypto details" },
43 { 's', T_KEYSET
, "symmetric keyset management" },
44 { 'x', T_KEYEXCH
, "key exchange" },
45 { 'm', T_KEYMGMT
, "key management" },
46 { 'A', T_ALL
, "all of the above" },
50 unsigned tr_flags
= 0;
53 static const trace_opt w_opts
[] = {
54 { 't', AF_TRACE
, "trace messages" },
55 { 'n', AF_NOTE
, "asynchronous notifications" },
56 { 'w', AF_WARN
, "warnings" },
57 { 'A', AF_ALLMSGS
, "all of the above" },
61 /*----- Static variables --------------------------------------------------*/
65 static const char *sockname
;
66 static unsigned flags
= 0;
67 static admin
*a_stdin
= 0;
68 static sig s_term
, s_int
, s_hup
;
73 #define T_RESOLVE SEC(30)
76 static void a_destroy(admin */
*a*/
);
77 static void a_lock(admin */
*a*/
);
78 static void a_unlock(admin */
*a*/
);
80 /*----- Output functions --------------------------------------------------*/
82 /* --- @trywrite@ --- *
84 * Arguments: @admin *a@ = pointer to an admin block
85 * @const char *p@ = pointer to buffer to write
86 * @size_t sz@ = size of data to write
88 * Returns: The number of bytes written, or less than zero on error.
90 * Use: Attempts to write data to a client.
93 static ssize_t
trywrite(admin
*a
, const char *p
, size_t sz
)
100 n
= write(a
->w
.fd
, p
, sz
);
110 if (errno
!= EAGAIN
&& errno
!= EWOULDBLOCK
) {
112 a_warn("ADMIN client-read-error -- %s", strerror(errno
));
119 /* --- @dosend@ --- *
121 * Arguemnts: @admin *a@ = pointer to an admin block
122 * @const char *p@ = pointer to buffer to write
123 * @size_t sz@ = size of data to write
127 * Use: Sends data to an admin client.
130 static void dosend(admin
*a
, const char *p
, size_t sz
)
138 /* --- Try to send the data immediately --- */
141 if ((n
= trywrite(a
, p
, sz
)) < 0)
149 /* --- Fill buffers with the data until it's all gone --- */
154 else if (o
->p_in
< o
->buf
+ OBUFSZ
)
158 o
= xmalloc(sizeof(obuf
));
160 o
->p_in
= o
->p_out
= o
->buf
;
168 n
= o
->buf
+ OBUFSZ
- o
->p_in
;
171 memcpy(o
->p_in
, p
, n
);
178 /* --- @a_flush@ --- *
180 * Arguments: @int fd@ = file descriptor
181 * @unsigned mode@ = what's happening
182 * @void *v@ = pointer to my admin block
186 * Use: Flushes buffers when a client is ready to read again.
189 static void a_flush(int fd
, unsigned mode
, void *v
)
197 if ((n
= trywrite(a
, o
->p_out
, o
->p_in
- o
->p_out
)) < 0)
200 if (o
->p_in
< o
->p_out
)
213 /*----- Utility functions -------------------------------------------------*/
215 /* --- @a_write@, @a_vwrite@ --- *
217 * Arguments: @admin *a@ = admin connection to write to
218 * @const char *tag@ = tag prefix string, or null
219 * @const char *fmt@ = pointer to format string
220 * @va_list ap@ = arguments in list
221 * @...@ = other arguments
225 * Use: Sends a message to an admin connection.
228 static void a_vwrite(admin
*a
, const char *tag
, const char *fmt
, va_list ap
)
237 dstr_vputf(&d
, fmt
, &ap
);
239 dosend(a
, d
.buf
, d
.len
);
243 static void a_write(admin
*a
, const char *tag
, const char *fmt
, ...)
247 a_vwrite(a
, tag
, fmt
, ap
);
251 /* --- @a_ok@, @a_info@, @a_fail@ --- *
253 * Arguments: @admin *a@ = connection
254 * @const char *fmt@ = format string
255 * @...@ = other arguments
259 * Use: Convenience functions for @a_write@.
262 static void a_ok(admin
*a
) { a_write(a
, "OK", 0); }
264 static void a_info(admin
*a
, const char *fmt
, ...)
268 a_vwrite(a
, "INFO", fmt
, ap
);
272 static void a_fail(admin
*a
, const char *fmt
, ...)
276 a_vwrite(a
, "FAIL", fmt
, ap
);
280 /* --- @a_alert@, @a_valert@, @a_rawalert@ --- *
282 * Arguments: @unsigned f_and, f_eq@ = filter for connections
283 * @const char *tag@ = tag prefix string
284 * @const char *fmt@ = pointer to format string
285 @ @const char *p@ = pointer to raw string
286 * @size_t sz@ = size of raw string
287 * @va_list ap@ = arguments in list
288 * @...@ = other arguments
292 * Use: Write a message to all admin connections matched by the given
296 static void a_rawalert(unsigned f_and
, unsigned f_eq
, const char *tag
,
297 const char *p
, size_t sz
)
302 if (!(flags
& F_INIT
))
310 dstr_putm(&d
, p
, sz
);
314 for (a
= admins
; a
; a
= aa
) {
316 if ((a
->f
& f_and
) == f_eq
)
317 dosend(a
, d
.buf
, d
.len
);
322 static void a_valert(unsigned f_and
, unsigned f_eq
, const char *tag
,
323 const char *fmt
, va_list ap
)
327 if (!(flags
& F_INIT
))
330 dstr_vputf(&d
, fmt
, &ap
);
331 a_rawalert(f_and
, f_eq
, tag
, fmt ? d
.buf
: 0, fmt ? d
.len
: 0);
336 static void a_alert(unsigned f_and
, unsigned f_eq
, const char *tag
,
337 const char *fmt
, ...)
341 a_valert(f_and
, f_eq
, tag
, fmt
, ap
);
346 /* --- @a_warn@ --- *
348 * Arguments: @const char *fmt@ = pointer to format string
349 * @...@ = other arguments
353 * Use: Informs all admin connections of a warning.
356 void a_warn(const char *fmt
, ...)
362 a_valert(0, 0, "WARN", fmt
, ap
);
364 fprintf(stderr
, "%s: ", QUIS
);
365 vfprintf(stderr
, fmt
, ap
);
371 /* --- @a_trace@ --- *
373 * Arguments: @const char *p@ = pointer to a buffer
374 * @size_t sz@ = size of the buffer
375 * @void *v@ = uninteresting pointer
379 * Use: Custom trace output handler. Sends trace messages to
380 * interested admin connections.
384 static void a_trace(const char *p
, size_t sz
, void *v
)
386 a_rawalert(AF_TRACE
, AF_TRACE
, "TRACE", p
, sz
);
390 /* --- @a_notify@ --- *
392 * Arguments: @const char *fmt@ = pointer to format string
393 * @...@ = other arguments
397 * Use: Sends a notification to interested admin connections.
400 void a_notify(const char *fmt
, ...)
405 a_valert(AF_NOTE
, AF_NOTE
, "NOTE", fmt
, ap
);
409 /* --- @a_quit@ --- *
415 * Use: Shuts things down nicely.
422 while ((p
= p_first()) != 0)
429 /* --- @a_sigdie@ --- *
431 * Arguments: @int sig@ = signal number
432 * @void *v@ = an uninteresting argument
436 * Use Shuts down on receipt of a fatal signal.
439 static void a_sigdie(int sig
, void *v
)
445 case SIGTERM
: p
= "SIGTERM"; break;
446 case SIGINT
: p
= "SIGINT"; break;
448 sprintf(buf
, "%i", sig
);
452 a_warn("SERVER quit signal %s", p
);
456 /* --- @a_sighup@ --- *
458 * Arguments: @int sig@ = signal number
459 * @void *v@ = an uninteresting argument
463 * Use Logs a message about SIGHUP not being useful.
466 static void a_sighup(int sig
, void *v
)
468 a_warn("SERVER ignore signal SIGHUP");
471 /* --- @a_parsetime@ --- *
473 * Arguments; @const char *p@ = time string to parse
475 * Returns: Time in seconds, or @< 0@ on error.
478 static long a_parsetime(const char *p
)
481 long t
= strtol(p
, &q
, 0);
487 case 's': if (q
[1] != 0)
494 /*----- Adding peers ------------------------------------------------------*/
496 /* --- @a_resolve@ --- *
498 * Arguments: @struct hostent *h@ = pointer to resolved hostname
499 * @void *v@ = pointer to admin block
503 * Use: Handles a completed name resolution.
506 static void a_resolve(struct hostent
*h
, void *v
)
511 T( trace(T_ADMIN
, "admin: %u resolved", a
->seq
); )
515 a_fail(a
, "resolve-error %s", a
->paddr
);
516 else if (p_find(a
->peer
.name
))
517 a_fail(a
, "peer-exists %s", a
->peer
.name
);
519 memcpy(&a
->peer
.sa
.sin
.sin_addr
, h
->h_addr
, sizeof(struct in_addr
));
520 if (!p_create(&a
->peer
))
521 a_fail(a
, "peer-create-fail %s", a
->peer
.name
);
528 selbuf_enable(&a
->b
);
532 /* --- @a_timer@ --- *
534 * Arguments: @struct timeval *tv@ = timer
535 * @void *v@ = pointer to admin block
539 * Use: Times out a resolver.
542 static void a_timer(struct timeval
*tv
, void *v
)
547 T( trace(T_ADMIN
, "admin: %u resolver timeout", a
->seq
); )
549 a_fail(a
, "resolver-timeout %s\n", a
->paddr
);
553 selbuf_enable(&a
->b
);
557 /* --- @acmd_add@ --- *
559 * Arguments: @admin *a@ = connection which requested the addition
560 * @unsigned ac@ = argument count
561 * @char *av[]@ = pointer to the argument list
565 * Use: Adds a new peer.
568 static void acmd_add(admin
*a
, unsigned ac
, char *av
[])
575 /* --- Make sure someone's not got there already --- */
578 a_fail(a
, "peer-exists %s", av
[0]);
582 /* --- Set stuff up --- */
584 a
->peer
.name
= av
[0];
586 a
->peer
.tops
= tun_default
;
588 /* --- Parse options --- */
594 if (mystrieq(av
[i
], "-tunnel")) {
595 if (!av
[++i
]) goto bad_syntax
;
598 a_fail(a
, "unknown-tunnel %s", av
[i
]);
601 if (mystrieq(av
[i
], tunnels
[j
]->name
)) {
602 a
->peer
.tops
= tunnels
[j
];
606 } else if (mystrieq(av
[i
], "-keepalive")) {
608 if (!av
[++i
]) goto bad_syntax
;
609 if ((t
= a_parsetime(av
[i
])) < 0) {
610 a_fail(a
, "bad-time-spec %s", av
[i
]);
614 } else if (mystrieq(av
[i
], "--")) {
622 /* --- Fill in the easy bits of address --- */
624 if (mystrieq(av
[i
], "inet")) i
++;
626 a_fail(a
, "bad-syntax -- add PEER [OPTIONS] [inet] ADDRESS PORT");
629 a
->peer
.sa
.sin
.sin_family
= AF_INET
;
630 a
->peer
.sasz
= sizeof(a
->peer
.sa
.sin
);
631 pt
= strtoul(av
[i
+ 1], &p
, 0);
633 struct servent
*s
= getservbyname(av
[i
+ 1], "udp");
635 a_fail(a
, "unknown-service %s", av
[i
+ 1]);
638 pt
= ntohs(s
->s_port
);
640 if (pt
== 0 || pt
>= 65536) {
641 a_fail(a
, "invalid-port %lu", pt
);
644 a
->peer
.sa
.sin
.sin_port
= htons(pt
);
646 /* --- If the name is numeric, do it the easy way --- */
648 if (inet_aton(av
[i
], &a
->peer
.sa
.sin
.sin_addr
)) {
649 if (!p_create(&a
->peer
))
650 a_fail(a
, "peer-create-fail %s", av
[0]);
657 /* --- Store everything for later and crank up the resolver --- *
659 * We disable the line buffer until the resolver completes (or times out).
660 * This prevents other commands on the same connection (though the rest of
661 * the system continues regardless), but makes life simpler for the client.
664 a
->peer
.name
= xstrdup(av
[0]);
665 a
->paddr
= xstrdup(av
[i
]);
666 selbuf_disable(&a
->b
);
667 gettimeofday(&tv
, 0);
668 tv
.tv_sec
+= T_RESOLVE
;
669 sel_addtimer(&sel
, &a
->t
, &tv
, a_timer
, a
);
670 bres_byname(&a
->r
, a
->paddr
, a_resolve
, a
);
671 T( trace(T_ADMIN
, "admin: %u resolving hostname `%s'",
676 a_fail(a
, "bad-syntax -- add PEER [OPTIONS] ADDR ...");
680 /*----- Ping --------------------------------------------------------------*/
682 /* --- @a_pong@ --- *
684 * Arguments: @int rc@ = return code
685 * @void *av@ = admin connection which requested the ping
689 * Use: Collects what happened to a ping message.
692 static void a_pong(int rc
, void *av
)
701 gettimeofday(&tv
, 0);
702 tv_sub(&tv
, &tv
, &a
->pingtime
);
703 millis
= (double)tv
.tv_sec
* 1000 + (double)tv
.tv_usec
/1000;
704 a_info(a
, "ping-ok %.1f", millis
);
708 a_info(a
, "ping-timeout");
712 a_info(a
, "ping-peer-died");
721 /* --- @acmd_ping@, @acmd_eping@ --- *
723 * Arguments: @admin *a@ = connection which requested the ping
724 * @unsigned ac@ = argument count
725 * @char *av[]@ = pointer to the argument list
732 static void a_ping(admin
*a
, unsigned ac
, char *av
[],
733 const char *cmd
, unsigned msg
)
743 if (mystrieq(av
[i
], "-timeout")) {
744 if (!av
[++i
]) goto bad_syntax
;
745 if ((t
= a_parsetime(av
[i
])) < 0) {
746 a_fail(a
, "bad-time-spec %s", av
[i
]);
749 } else if (mystrieq(av
[i
], "--")) {
757 if (!av
[i
]) goto bad_syntax
;
758 if ((p
= p_find(av
[i
])) == 0) {
759 a_fail(a
, "unknown-peer %s", av
[i
]);
762 gettimeofday(&a
->pingtime
, 0);
763 if (p_pingsend(p
, &a
->ping
, msg
, t
, a_pong
, a
))
764 a_fail(a
, "ping-send-failed");
768 a_fail(a
, "bad-syntax -- %s [OPTIONS] PEER", cmd
);
772 static void acmd_ping(admin
*a
, unsigned ac
, char *av
[])
773 { a_ping(a
, ac
, av
, "ping", MISC_PING
); }
774 static void acmd_eping(admin
*a
, unsigned ac
, char *av
[])
775 { a_ping(a
, ac
, av
, "eping", MISC_EPING
); }
778 /*----- Administration commands -------------------------------------------*/
780 /* --- Miscellaneous commands --- */
782 /* --- @traceish@ --- *
784 * Arguments: @admin *a@ = connection to complain on
785 * @unsigned ac@ = number of arguments
786 * @char *av[]@ = vector of arguments
787 * @const char *what@ = what we're messing with
788 * @const trace_opt *tt@ = options table
789 * @unsigned *ff@ = where the flags are
791 * Returns: Nonzero if anything changed.
793 * Use: Guts of trace-ish commands like `trace' and `watch'.
796 static int traceish(admin
*a
, unsigned ac
, char *av
[],
797 const char *what
, const trace_opt
*tt
, unsigned *ff
)
801 if (!ac
|| strcmp(av
[0], "?") == 0) {
803 a_info(a
, "Current %s status:", what
);
804 for (t
= tt
; t
->ch
; t
++) {
805 a_info(a
, "%c %c %s",
806 t
->ch
, (*ff
& t
->f
) == t
->f ?
'*' : ' ', t
->help
);
816 case '+': sense
= 1; break;
817 case '-': sense
= 0; break;
819 for (t
= tt
; t
->ch
; t
++) {
821 if (sense
) f
|= t
->f
;
826 a_fail(a
, "bad-%s-option %c", what
, *p
);
842 static void acmd_trace(admin
*a
, unsigned ac
, char *av
[])
844 if (traceish(a
, ac
, av
, "trace", tr_opts
, &tr_flags
))
845 trace_level(tr_flags
);
850 static void acmd_watch(admin
*a
, unsigned ac
, char *av
[])
852 traceish(a
, ac
, av
, "watch", w_opts
, &a
->f
);
855 static void quotify(dstr
*d
, const char *p
)
859 if (*p
&& !p
[strcspn(p
, "\"' \t\n\v")])
864 if (*p
== '\\' || *p
== '\"')
872 static void alertcmd(admin
*a
, unsigned f_and
, unsigned f_eq
,
873 const char *tag
, unsigned ac
, char *av
[])
878 dstr_puts(&d
, "USER");
879 for (i
= 0; i
< ac
; i
++)
882 a_rawalert(f_and
, f_eq
, tag
, d
.buf
, d
.len
);
887 static void acmd_notify(admin
*a
, unsigned ac
, char *av
[])
888 { alertcmd(a
, AF_NOTE
, AF_NOTE
, "NOTE", ac
, av
); }
889 static void acmd_warn(admin
*a
, unsigned ac
, char *av
[])
890 { alertcmd(a
, AF_WARN
, AF_WARN
, "WARN", ac
, av
); }
892 static void acmd_port(admin
*a
, unsigned ac
, char *av
[])
894 a_info(a
, "%u", p_port());
898 static void acmd_daemon(admin
*a
, unsigned ac
, char *av
[])
900 if (flags
& F_DAEMON
)
901 a_fail(a
, "already-daemon");
907 a_fail(a
, "daemon-error -- %s", strerror(errno
));
915 static void acmd_list(admin
*a
, unsigned ac
, char *av
[])
918 for (p
= p_first(); p
; p
= p_next(p
))
919 a_info(a
, "%s", p_name(p
));
923 static void acmd_ifname(admin
*a
, unsigned ac
, char *av
[])
927 if ((p
= p_find(av
[0])) == 0)
928 a_fail(a
, "unknown-peer %s", av
[0]);
930 a_info(a
, "%s", p_ifname(p
));
935 static void acmd_addr(admin
*a
, unsigned ac
, char *av
[])
940 if ((p
= p_find(av
[0])) == 0)
941 a_fail(a
, "unknown-peer %s", av
[0]);
944 assert(ad
->sa
.sa_family
== AF_INET
);
945 a_info(a
, "INET %s %u",
946 inet_ntoa(ad
->sin
.sin_addr
),
947 (unsigned)ntohs(ad
->sin
.sin_port
));
952 static void acmd_stats(admin
*a
, unsigned ac
, char *av
[])
957 if ((p
= p_find(av
[0])) == 0)
958 a_fail(a
, "unknown-peer %s", av
[0]);
961 a_info(a
, "start-time=%s", timestr(st
->t_start
));
962 a_info(a
, "last-packet-time=%s", timestr(st
->t_last
));
963 a_info(a
, "last-keyexch-time=%s", timestr(st
->t_kx
));
964 a_info(a
, "packets-in=%lu bytes-in=%lu", st
->n_in
, st
->sz_in
);
965 a_info(a
, "packets-out=%lu bytes-out=%lu",
966 st
->n_out
, st
->sz_out
);
967 a_info(a
, "keyexch-packets-in=%lu keyexch-bytes-in=%lu",
968 st
->n_kxin
, st
->sz_kxin
);
969 a_info(a
, "keyexch-packets-out=%lu keyexch-bytes-out=%lu",
970 st
->n_kxout
, st
->sz_kxout
);
971 a_info(a
, "ip-packets-in=%lu ip-bytes-in=%lu",
972 st
->n_ipin
, st
->sz_ipin
);
973 a_info(a
, "ip-packets-out=%lu ip-bytes-out=%lu",
974 st
->n_ipout
, st
->sz_ipout
);
975 a_info(a
, "rejected-packets=%lu", st
->n_reject
);
980 static void acmd_kill(admin
*a
, unsigned ac
, char *av
[])
983 if ((p
= p_find(av
[0])) == 0)
984 a_fail(a
, "unknown-peer %s", av
[0]);
991 static void acmd_forcekx(admin
*a
, unsigned ac
, char *av
[])
994 if ((p
= p_find(av
[0])) == 0)
995 a_fail(a
, "unknown-peer %s", av
[0]);
1002 static void acmd_quit(admin
*a
, unsigned ac
, char *av
[])
1004 a_warn("SERVER quit admin-request");
1009 static void acmd_version(admin
*a
, unsigned ac
, char *av
[])
1011 a_info(a
, "%s %s", PACKAGE
, VERSION
);
1015 static void acmd_tunnels(admin
*a
, unsigned ac
, char *av
[])
1018 for (i
= 0; tunnels
[i
]; i
++)
1019 a_info(a
, "%s", tunnels
[i
]->name
);
1023 /* --- The command table and help --- */
1025 typedef struct acmd
{
1028 unsigned argmin
, argmax
;
1029 void (*func
)(admin */
*a*/
, unsigned /*ac*/, char */
*av*/
[]);
1032 static void acmd_help(admin */
*a*/
, unsigned /*ac*/, char */
*av*/
[]);
1034 static const acmd acmdtab
[] = {
1035 { "help", "help", 0, 0, acmd_help
},
1036 { "version", "version", 0, 0, acmd_version
},
1038 { "trace", "trace [OPTIONS]", 0, 1, acmd_trace
},
1040 { "watch", "watch [OPTIONS]", 0, 1, acmd_watch
},
1041 { "notify", "notify MESSAGE ...", 1, 0xffff, acmd_notify
},
1042 { "warn", "warn MESSAGE ...", 1, 0xffff, acmd_warn
},
1043 { "port", "port", 0, 0, acmd_port
},
1044 { "daemon", "daemon", 0, 0, acmd_daemon
},
1045 { "list", "list", 0, 0, acmd_list
},
1046 { "ifname", "ifname PEER", 1, 1, acmd_ifname
},
1047 { "addr", "addr PEER", 1, 1, acmd_addr
},
1048 { "stats", "stats PEER", 1, 1, acmd_stats
},
1049 { "ping", "ping [OPTIONS] PEER", 1, 0xffff, acmd_ping
},
1050 { "eping", "eping [OPTIONS] PEER", 1, 0xffff, acmd_eping
},
1051 { "kill", "kill PEER", 1, 1, acmd_kill
},
1052 { "forcekx", "forcekx PEER", 1, 1, acmd_forcekx
},
1053 { "add", "add PEER [OPTIONS] ADDR ...",
1054 2, 0xffff, acmd_add
},
1055 { "tunnels", "tunnels", 0, 0, acmd_tunnels
},
1056 { "quit", "quit", 0, 0, acmd_quit
},
1060 static void acmd_help(admin
*a
, unsigned ac
, char *av
[])
1063 for (c
= acmdtab
; c
->name
; c
++)
1064 a_info(a
, "%s", c
->help
);
1068 /*----- Connection handling -----------------------------------------------*/
1070 /* --- @a_lock@ --- *
1072 * Arguments: @admin *a@ = pointer to an admin block
1076 * Use: Locks an admin block so that it won't be destroyed
1080 static void a_lock(admin
*a
) { assert(!(a
->f
& AF_LOCK
)); a
->f
|= AF_LOCK
; }
1082 /* --- @a_unlock@ --- *
1084 * Arguments: @admin *a@ = pointer to an admin block
1088 * Use: Unlocks an admin block, allowing its destruction. This is
1089 * also the second half of @a_destroy@.
1092 static void a_unlock(admin
*a
)
1094 assert(a
->f
& AF_LOCK
);
1095 if (!(a
->f
& AF_DEAD
)) {
1100 T( trace(T_ADMIN
, "admin: completing destruction of connection %u",
1103 selbuf_destroy(&a
->b
);
1105 xfree(a
->peer
.name
);
1111 p_pingdone(&a
->ping
, PING_NONOTIFY
);
1112 if (a
->b
.reader
.fd
!= a
->w
.fd
)
1113 close(a
->b
.reader
.fd
);
1119 a
->next
->prev
= a
->prev
;
1121 a
->prev
->next
= a
->next
;
1127 /* --- @a_destroy@ --- *
1129 * Arguments: @admin *a@ = pointer to an admin block
1133 * Use: Destroys an admin block. This requires a certain amount of
1137 static void a_destroy(admin
*a
)
1139 /* --- Don't multiply destroy admin blocks --- */
1144 /* --- Make sure nobody expects it to work --- */
1147 T( trace(T_ADMIN
, "admin: destroying connection %u", a
->seq
); )
1149 /* --- Free the output buffers --- */
1154 for (o
= a
->o_head
; o
; o
= oo
) {
1161 /* --- If the block is locked, that's all we can manage --- */
1163 if (a
->f
& AF_LOCK
) {
1164 T( trace(T_ADMIN
, "admin: deferring destruction..."); )
1171 /* --- @a_line@ --- *
1173 * Arguments: @char *p@ = pointer to the line read
1174 * @size_t len@ = length of the line
1175 * @void *vp@ = pointer to my admin block
1179 * Use: Handles a line of input.
1182 static void a_line(char *p
, size_t len
, void *vp
)
1196 ac
= str_qsplit(p
, av
, 16, 0, STRF_QUOTE
);
1199 for (c
= acmdtab
; c
->name
; c
++) {
1200 if (mystrieq(av
[0], c
->name
)) {
1202 if (c
->argmin
> ac
|| ac
> c
->argmax
)
1203 a_fail(a
, "bad-syntax -- %s", c
->help
);
1206 c
->func(a
, ac
, av
+ 1);
1212 a_fail(a
, "unknown-command %s", av
[0]);
1215 /* --- @a_create@ --- *
1217 * Arguments: @int fd_in, fd_out@ = file descriptors to use
1218 * @unsigned f@ = initial flags to set
1222 * Use: Creates a new admin connection.
1225 void a_create(int fd_in
, int fd_out
, unsigned f
)
1227 admin
*a
= CREATE(admin
);
1229 T( static unsigned seq
= 0;
1231 T( trace(T_ADMIN
, "admin: accepted connection %u", a
->seq
); )
1235 if (fd_in
== STDIN_FILENO
)
1237 fdflags(fd_in
, O_NONBLOCK
, O_NONBLOCK
, FD_CLOEXEC
, FD_CLOEXEC
);
1238 if (fd_out
!= fd_in
)
1239 fdflags(fd_out
, O_NONBLOCK
, O_NONBLOCK
, FD_CLOEXEC
, FD_CLOEXEC
);
1240 selbuf_init(&a
->b
, &sel
, fd_in
, a_line
, a
);
1241 sel_initfile(&sel
, &a
->w
, fd_out
, SEL_WRITE
, a_flush
, a
);
1251 /* --- @a_accept@ --- *
1253 * Arguments: @int fd@ = file descriptor to accept
1254 * @unsigned mode@ = what to do
1255 * @void *v@ = uninteresting pointer
1259 * Use: Accepts a new admin connection.
1262 static void a_accept(int fd
, unsigned mode
, void *v
)
1265 struct sockaddr_un sun
;
1266 size_t sz
= sizeof(sun
);
1268 if ((nfd
= accept(fd
, (struct sockaddr
*)&sun
, &sz
)) < 0) {
1269 if (errno
!= EINTR
&& errno
!= EAGAIN
&& errno
!= EWOULDBLOCK
&&
1270 errno
!= ECONNABORTED
&& errno
!= EPROTO
)
1271 a_warn("ADMIN accept-error -- %s", strerror(errno
));
1274 a_create(nfd
, nfd
, 0);
1277 /* --- @a_daemon@ --- *
1283 * Use: Informs the admin module that it's a daemon.
1291 /* --- @a_init@ --- *
1293 * Arguments: @const char *name@ = socket name to create
1297 * Use: Creates the admin listening socket.
1300 void a_init(const char *name
)
1304 struct sockaddr_un sun
;
1305 struct sigaction sa
;
1308 /* --- Set up the socket address --- */
1310 sz
= strlen(name
) + 1;
1311 if (sz
> sizeof(sun
.sun_path
))
1312 die(EXIT_FAILURE
, "socket name `%s' too long", name
);
1314 sun
.sun_family
= AF_UNIX
;
1315 memcpy(sun
.sun_path
, name
, sz
);
1316 sz
+= offsetof(struct sockaddr_un
, sun_path
);
1318 /* --- Attempt to bind to the socket --- */
1322 if ((fd
= socket(PF_UNIX
, SOCK_STREAM
, 0)) < 0)
1323 die(EXIT_FAILURE
, "couldn't create socket: %s", strerror(errno
));
1324 if (bind(fd
, (struct sockaddr
*)&sun
, sz
) < 0) {
1327 if (errno
!= EADDRINUSE
) {
1328 die(EXIT_FAILURE
, "couldn't bind to address `%s': %s",
1329 sun
.sun_path
, strerror(e
));
1332 die(EXIT_FAILURE
, "too many retries; giving up");
1334 if (!connect(fd
, (struct sockaddr
*)&sun
, sz
)) {
1335 die(EXIT_FAILURE
, "server already listening on admin socket `%s'",
1338 if (errno
!= ECONNREFUSED
)
1339 die(EXIT_FAILURE
, "couldn't bind to address: %s", strerror(e
));
1340 if (stat(sun
.sun_path
, &st
)) {
1341 die(EXIT_FAILURE
, "couldn't stat `%s': %s",
1342 sun
.sun_path
, strerror(errno
));
1344 if (!S_ISSOCK(st
.st_mode
))
1345 die(EXIT_FAILURE
, "object `%s' isn't a socket", sun
.sun_path
);
1346 T( trace(T_ADMIN
, "admin: stale socket found; removing it"); )
1347 unlink(sun
.sun_path
);
1351 chmod(sun
.sun_path
, 0600);
1352 fdflags(fd
, O_NONBLOCK
, O_NONBLOCK
, FD_CLOEXEC
, FD_CLOEXEC
);
1354 die(EXIT_FAILURE
, "couldn't listen on socket: %s", strerror(errno
));
1356 /* --- Listen to the socket --- */
1358 sel_initfile(&sel
, &sock
, fd
, SEL_READ
, a_accept
, 0);
1362 T( trace_custom(a_trace
, 0);
1363 trace(T_ADMIN
, "admin: enabled custom tracing"); )
1366 /* --- Set up signal handlers --- */
1368 sig_add(&s_term
, SIGTERM
, a_sigdie
, 0);
1369 sig_add(&s_hup
, SIGHUP
, a_sighup
, 0);
1370 signal(SIGPIPE
, SIG_IGN
);
1371 sigaction(SIGINT
, 0, &sa
);
1372 if (sa
.sa_handler
!= SIG_IGN
)
1373 sig_add(&s_int
, SIGINT
, a_sigdie
, 0);
1376 /*----- That's all, folks -------------------------------------------------*/