3 * Communication with the peer
5 * (c) 2001 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of Trivial IP Encryption (TrIPE).
12 * TrIPE is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * TrIPE is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with TrIPE; if not, write to the Free Software Foundation,
24 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 /*----- Header files ------------------------------------------------------*/
31 /*----- Static variables --------------------------------------------------*/
33 static sym_table byname
;
34 static addrmap byaddr
;
36 static unsigned nmobile
;
38 /*----- Tunnel table ------------------------------------------------------*/
40 const tunnel_ops
*tunnels
[] = {
54 /*----- Main code ---------------------------------------------------------*/
56 /* --- @p_pingtype@ --- *
58 * Arguments: @unsigned msg@ = message type
60 * Returns: String to describe the message.
63 static const char *p_pingtype(unsigned msg
)
65 switch (msg
& MSG_TYPEMASK
) {
68 return "transport-ping";
71 return "encrypted-ping";
77 /* --- @p_ponged@ --- *
79 * Arguments: @peer *p@ = peer packet arrived from
80 * @unsigned msg@ = message type
81 * @buf *b@ = buffer containing payload
85 * Use: Processes a ping response.
88 static void p_ponged(peer
*p
, unsigned msg
, buf
*b
)
95 trace(T_PEER
, "peer: received %s reply from %s",
96 p_pingtype(msg
), p
->spec
.name
);
97 trace_block(T_PACKET
, "peer: ping contents", BBASE(b
), BSZ(b
));
100 if (buf_getu32(b
, &id
) ||
101 (magic
= buf_get(b
, sizeof(pg
->magic
))) == 0 ||
103 a_warn("PEER", "?PEER", p
, "malformed-%s", p_pingtype(msg
), A_END
);
107 for (pg
= p
->pings
; pg
; pg
= pg
->next
) {
113 "unexpected-%s", p_pingtype(msg
),
114 "0x%08lx", (unsigned long)id
,
119 if (memcmp(magic
, pg
->magic
, sizeof(pg
->magic
)) != 0) {
120 a_warn("PEER", "?PEER", p
, "corrupt-%s", p_pingtype(msg
), A_END
);
123 p_pingdone(pg
, PING_OK
);
126 /* --- @p_rxupdstats@ --- *
128 * Arguments: @peer *p@ = peer to update
129 * @size_t n@ = size of incoming packet
133 * Use: Updates the peer's incoming packet statistics.
136 static void p_rxupdstats(peer
*p
, size_t n
)
138 p
->st
.t_last
= time(0);
143 /* --- @p_encrypt@ --- *
145 * Arguments: @peer *p@ = peer to encrypt message to
146 * @int ty@ message type to send
147 * @buf *bin, *bout@ = input and output buffers
151 * Use: Convenience function for packet encryption. Forces
152 * renegotiation when necessary. Check for the output buffer
153 * being broken to find out whether the encryption was
157 static int p_encrypt(peer
*p
, int ty
, buf
*bin
, buf
*bout
)
159 int err
= ksl_encrypt(&p
->ks
, ty
, bin
, bout
);
161 if (err
== KSERR_REGEN
) {
170 /* --- @p_decrypt@ --- *
172 * Arguments: @peer **pp@ = pointer to peer to decrypt message from
173 * @addr *a@ = address the packet arrived on
174 * @size_t n@ = size of original incoming packet
175 * @int ty@ = message type to expect
176 * @buf *bin, *bout@ = input and output buffers
178 * Returns: Zero on success; nonzero on error.
180 * Use: Convenience function for packet decryption. Reports errors
181 * and updates statistics appropriately.
183 * If @*pp@ is null on entry and there are mobile peers then we
184 * see if any of them can decrypt the packet. If so, we record
185 * @*a@ as the peer's new address and send a notification.
188 static int p_decrypt(peer
**pp
, addr
*a
, size_t n
,
189 int ty
, buf
*bin
, buf
*bout
)
192 peer_byaddr
*pa
, *qa
;
193 int err
= KSERR_DECRYPT
;
196 /* --- If we have a match on the source address then try that first --- */
200 T( trace(T_PEER
, "peer: decrypting packet from known peer `%s'",
202 if ((err
= ksl_decrypt(&q
->ks
, ty
, bin
, bout
)) != KSERR_DECRYPT
||
203 !(q
->spec
.f
& PSF_MOBILE
) || nmobile
== 1) {
207 T( trace(T_PEER
, "peer: failed to decrypt: try other mobile peers...",
210 T( trace(T_PEER
, "peer: unknown source: trying mobile peers..."); )
216 /* --- See whether any mobile peer is interested --- */
220 if (qq
== q
|| !(qq
->spec
.f
& PSF_MOBILE
)) continue;
221 if ((err
= ksl_decrypt(&qq
->ks
, ty
, bin
, bout
)) == KSERR_DECRYPT
) {
222 T( trace(T_PEER
, "peer: peer `%s' failed to decrypt",
229 trace(T_PEER
, "peer: peer `%s' reports success", p_name(qq
));
231 trace(T_PEER
, "peer: peer `%s' reports decryption error %d",
239 /* --- We've searched the mobile peers --- */
244 a_warn("PEER", "-", "unexpected-source", "?ADDR", a
, A_END
);
246 a_warn("PEER", "?PEER", p
, "decrypt-failed",
247 "error-code", "%d", err
, A_END
);
253 /* --- We found one that accepted, so update the peer's address --- *
255 * If we had an initial guess of which peer this packet came from -- i.e.,
256 * @q@ is not null -- then swap the addresses over. This doesn't leave the
257 * evicted peer in an especially good state, but it ought to get sorted out
264 T( trace(T_PEER
, "peer: updating address for `%s'", p_name(p
)); )
265 pa
= am_find(&byaddr
, a
, sizeof(peer_byaddr
), &f
); assert(!f
);
266 am_remove(&byaddr
, p
->byaddr
);
270 a_notify("NEWADDR", "?PEER", p
, "?ADDR", a
, A_END
);
272 T( trace(T_PEER
, "peer: swapping addresses for `%s' and `%s'",
273 p_name(p
), p_name(q
)); )
274 pa
= p
->byaddr
; qa
= q
->byaddr
;
275 pa
->p
= q
; q
->byaddr
= pa
; q
->spec
.sa
= p
->spec
.sa
;
276 qa
->p
= p
; p
->byaddr
= qa
; p
->spec
.sa
= *a
;
277 a_notify("NEWADDR", "?PEER", p
, "?ADDR", a
, A_END
);
278 a_notify("NEWADDR", "?PEER", q
, "?ADDR", &q
->spec
.sa
, A_END
);
285 if (p
) p
->st
.n_reject
++;
286 a_warn("PEER", "?PEER", p
, "decrypt-failed",
287 "error-code", "%d", err
, A_END
);
295 /* --- @p_read@ --- *
297 * Arguments: @int fd@ = file descriptor to read from
298 * @unsigned mode@ = what happened
299 * @void *v@ = an uninteresting pointer
303 * Use: Reads a packet from somewhere.
306 static void p_read(int fd
, unsigned mode
, void *v
)
315 /* --- Read the data --- */
319 n
= recvfrom(fd
, buf_i
, sizeof(buf_i
), 0, &a
.sa
, &sz
);
321 a_warn("PEER", "-", "socket-read-error", "?ERRNO", A_END
);
325 /* --- If the packet is a greeting, don't check peers --- */
327 if (n
&& buf_i
[0] == (MSG_MISC
| MISC_GREET
)) {
329 trace(T_PEER
, "peer: greeting received from INET %s %u",
330 inet_ntoa(a
.sin
.sin_addr
),
331 (unsigned)ntohs(a
.sin
.sin_port
));
332 trace_block(T_PACKET
, "peer: greeting contents", buf_i
, n
);
334 buf_init(&b
, buf_i
, n
);
336 if (c_check(&b
) || BLEFT(&b
)) {
337 a_warn("PEER", "-", "invalid-greeting", A_END
);
341 "?B64", buf_i
+ 1, (size_t)(n
- 1),
347 /* --- Find the appropriate peer --- *
349 * At this stage, don't worry too much about whether we actually found it.
352 p
= p_findbyaddr(&a
);
357 "peer: packet received from `%s' from address INET %s %d",
358 p_name(p
), inet_ntoa(a
.sin
.sin_addr
), ntohs(a
.sin
.sin_port
));
360 trace(T_PEER
, "peer: packet received from unknown address INET %s %d",
361 inet_ntoa(a
.sin
.sin_addr
), ntohs(a
.sin
.sin_port
));
363 trace_block(T_PACKET
, "peer: packet contents", buf_i
, n
);
366 /* --- Pick the packet apart --- */
368 buf_init(&b
, buf_i
, n
);
369 if ((ch
= buf_getbyte(&b
)) < 0) {
370 a_warn("PEER", "?PEER", p
, "bad-packet", "no-type", A_END
);
373 switch (ch
& MSG_CATMASK
) {
375 if (ch
& MSG_TYPEMASK
) {
379 "unknown-type", "0x%02x", ch
,
381 if (p
) p
->st
.n_reject
++;
384 buf_init(&bb
, buf_o
, sizeof(buf_o
));
385 if (p_decrypt(&p
, &a
, n
, MSG_PACKET
, &b
, &bb
))
389 p
->st
.sz_ipin
+= BSZ(&b
);
390 p
->t
->ops
->inject(p
->t
, &bb
);
393 a_warn("PEER", "?PEER", p
, "packet-build-failed", A_END
);
399 kx_message(&p
->kx
, ch
& MSG_TYPEMASK
, &b
);
402 switch (ch
& MSG_TYPEMASK
) {
406 T( trace(T_PEER
, "peer: received NOP packet"); )
411 buf_put(p_txstart(p
, MSG_MISC
| MISC_PONG
), BCUR(&b
), BLEFT(&b
));
417 p_ponged(p
, MISC_PONG
, &b
);
420 buf_init(&bb
, buf_t
, sizeof(buf_t
));
421 if (p_decrypt(&p
, &a
, n
, ch
, &b
, &bb
))
425 p_encrypt(p
, MSG_MISC
| MISC_EPONG
, &bb
,
426 p_txstart(p
, MSG_MISC
| MISC_EPONG
));
431 buf_init(&bb
, buf_t
, sizeof(buf_t
));
432 if (p_decrypt(&p
, &a
, n
, ch
, &b
, &bb
))
436 p_ponged(p
, MISC_EPONG
, &bb
);
442 if (p
) p
->st
.n_reject
++;
446 "unknown-category", "0x%02x", ch
,
450 a_warn("PEER", "-", "unexpected-source", "?ADDR", &a
, A_END
);
455 /* --- @p_txstart@ --- *
457 * Arguments: @peer *p@ = pointer to peer block
458 * @unsigned msg@ = message type code
460 * Returns: A pointer to a buffer to write to.
462 * Use: Starts sending to a peer. Only one send can happen at a
466 buf
*p_txstart(peer
*p
, unsigned msg
)
468 buf_init(&p
->b
, buf_o
, sizeof(buf_o
));
469 buf_putbyte(&p
->b
, msg
);
473 /* --- @p_txend@ --- *
475 * Arguments: @peer *p@ = pointer to peer block
479 * Use: Sends a packet to the peer.
482 static void p_setkatimer(peer
*);
484 static int p_dotxend(peer
*p
)
487 a_warn("PEER", "?PEER", p
, "packet-build-failed", A_END
);
490 IF_TRACING(T_PEER
, trace_block(T_PACKET
, "peer: sending packet",
491 BBASE(&p
->b
), BLEN(&p
->b
)); )
492 if (sendto(sock
.fd
, BBASE(&p
->b
), BLEN(&p
->b
),
493 0, &p
->spec
.sa
.sa
, p
->spec
.sasz
) < 0) {
494 a_warn("PEER", "?PEER", p
, "socket-write-error", "?ERRNO", A_END
);
498 p
->st
.sz_out
+= BLEN(&p
->b
);
503 void p_txend(peer
*p
)
505 if (p_dotxend(p
) && p
->spec
.t_ka
) {
506 sel_rmtimer(&p
->tka
);
511 /* --- @p_pingwrite@ --- *
513 * Arguments: @ping *p@ = ping structure
514 * @buf *b@ = buffer to write in
518 * Use: Fills in a ping structure and writes the packet payload.
521 static void p_pingwrite(ping
*p
, buf
*b
)
523 static uint32 seq
= 0;
526 GR_FILL(&rand_global
, p
->magic
, sizeof(p
->magic
));
527 buf_putu32(b
, p
->id
);
528 buf_put(b
, p
->magic
, sizeof(p
->magic
));
531 /* --- @p_pingdone@ --- *
533 * Arguments: @ping *p@ = ping structure
534 * @int rc@ = return code to pass on
538 * Use: Disposes of a ping structure, maybe sending a notification.
541 void p_pingdone(ping
*p
, int rc
)
543 if (p
->prev
) p
->prev
->next
= p
->next
;
544 else p
->p
->pings
= p
->next
;
545 if (p
->next
) p
->next
->prev
= p
->prev
;
546 if (rc
!= PING_TIMEOUT
) sel_rmtimer(&p
->t
);
547 T( trace(T_PEER
, "peer: ping 0x%08lx done (rc = %d)",
548 (unsigned long)p
->id
, rc
); )
549 if (rc
>= 0) p
->func(rc
, p
->arg
);
552 /* --- @p_pingtimeout@ --- *
554 * Arguments: @struct timeval *now@ = the time now
555 * @void *pv@ = pointer to ping block
559 * Use: Called when a ping times out.
562 static void p_pingtimeout(struct timeval
*now
, void *pv
)
566 T( trace(T_PEER
, "peer: ping 0x%08lx timed out", (unsigned long)p
->id
); )
567 p_pingdone(p
, PING_TIMEOUT
);
570 /* --- @p_pingsend@ --- *
572 * Arguments: @peer *p@ = destination peer
573 * @ping *pg@ = structure to fill in
574 * @unsigned type@ = message type
575 * @unsigned long timeout@ = how long to wait before giving up
576 * @void (*func)(int, void *)@ = callback function
577 * @void *arg@ = argument for callback
579 * Returns: Zero if successful, nonzero if it failed.
581 * Use: Sends a ping to a peer. Call @func@ with a nonzero argument
582 * if we get an answer within the timeout, or zero if no answer.
585 int p_pingsend(peer
*p
, ping
*pg
, unsigned type
,
586 unsigned long timeout
,
587 void (*func
)(int, void *), void *arg
)
595 b
= p_txstart(p
, MSG_MISC
| MISC_PING
);
600 pg
->msg
= MISC_EPONG
;
601 b
= p_txstart(p
, MSG_MISC
| MISC_EPING
);
602 buf_init(&bb
, buf_t
, sizeof(buf_t
));
603 p_pingwrite(pg
, &bb
);
605 p_encrypt(p
, MSG_MISC
| MISC_EPING
, &bb
, b
);
620 if (p
->pings
) p
->pings
->prev
= pg
;
622 gettimeofday(&tv
, 0);
623 tv
.tv_sec
+= timeout
;
624 sel_addtimer(&sel
, &pg
->t
, &tv
, p_pingtimeout
, pg
);
625 T( trace(T_PEER
, "peer: send %s 0x%08lx to %s",
626 p_pingtype(type
), (unsigned long)pg
->id
, p
->spec
.name
); )
630 /* --- @p_greet@ --- *
632 * Arguments: @peer *p@ = peer to send to
633 * @const void *c@ = pointer to challenge
634 * @size_t sz@ = size of challenge
638 * Use: Sends a greeting packet.
641 void p_greet(peer
*p
, const void *c
, size_t sz
)
643 buf
*b
= p_txstart(p
, MSG_MISC
| MISC_GREET
);
650 * Arguments: @peer *p@ = pointer to peer block
651 * @buf *b@ = buffer containing incoming packet
655 * Use: Handles a packet which needs to be sent to a peer.
658 void p_tun(peer
*p
, buf
*b
)
660 buf
*bb
= p_txstart(p
, MSG_PACKET
);
663 p_encrypt(p
, MSG_PACKET
, b
, bb
);
664 if (BOK(bb
) && BLEN(bb
)) {
666 p
->st
.sz_ipout
+= BLEN(bb
);
671 /* --- @p_keyreload@ --- *
677 * Use: Forces a check of the daemon's keyring files.
680 void p_keyreload(void)
683 FOREACH_PEER(p
, { kx_newkeys(&p
->kx
); });
686 /* --- @p_interval@ --- *
692 * Use: Called periodically to do tidying.
695 void p_interval(void)
698 FOREACH_PEER(p
, { ksl_prune(&p
->ks
); });
701 /* --- @p_stats@ --- *
703 * Arguments: @peer *p@ = pointer to a peer block
705 * Returns: A pointer to the peer's statistics.
708 stats
*p_stats(peer
*p
) { return (&p
->st
); }
710 /* --- @p_ifname@ --- *
712 * Arguments: @peer *p@ = pointer to a peer block
714 * Returns: A pointer to the peer's interface name.
717 const char *p_ifname(peer
*p
) { return (p
->ifname
); }
719 /* --- @p_setifname@ --- *
721 * Arguments: @peer *p@ = pointer to a peer block
722 * @const char *name@ = pointer to the new name
726 * Use: Changes the name held for a peer's interface.
729 void p_setifname(peer
*p
, const char *name
)
732 p
->ifname
= xstrdup(name
);
733 if (p
->spec
.tops
->setifname
)
734 p
->spec
.tops
->setifname(p
->t
, name
);
737 /* --- @p_addr@ --- *
739 * Arguments: @peer *p@ = pointer to a peer block
741 * Returns: A pointer to the peer's address.
744 const addr
*p_addr(peer
*p
) { return (&p
->spec
.sa
); }
746 /* --- @p_init@ --- *
748 * Arguments: @struct in_addr addr@ = address to bind to
749 * @unsigned port@ = port number to listen to
753 * Use: Initializes the peer system; creates the socket.
756 void p_init(struct in_addr addr
, unsigned port
)
759 struct sockaddr_in sin
;
762 /* --- Note on socket buffer sizes --- *
764 * For some bizarre reason, Linux 2.2 (at least) doubles the socket buffer
765 * sizes I pass to @setsockopt@. I'm not putting special-case code here
766 * for Linux: BSD (at least TCPv2) does what I tell it rather than second-
770 if ((fd
= socket(PF_INET
, SOCK_DGRAM
, 0)) < 0)
771 die(EXIT_FAILURE
, "socket creation failed: %s", strerror(errno
));
773 sin
.sin_family
= AF_INET
;
775 sin
.sin_port
= htons(port
);
776 if (bind(fd
, (struct sockaddr
*)&sin
, sizeof(sin
)))
777 die(EXIT_FAILURE
, "bind failed: %s", strerror(errno
));
778 if (setsockopt(fd
, SOL_SOCKET
, SO_RCVBUF
, &len
, sizeof(len
)) ||
779 setsockopt(fd
, SOL_SOCKET
, SO_SNDBUF
, &len
, sizeof(len
))) {
780 die(EXIT_FAILURE
, "failed to set socket buffer sizes: %s",
783 fdflags(fd
, O_NONBLOCK
, O_NONBLOCK
, FD_CLOEXEC
, FD_CLOEXEC
);
784 sel_initfile(&sel
, &sock
, fd
, SEL_READ
, p_read
, 0);
786 T( trace(T_PEER
, "peer: created socket"); )
792 /* --- @p_port@ --- *
796 * Returns: Port number used for socket.
799 unsigned p_port(void)
802 size_t sz
= sizeof(addr
);
804 if (getsockname(sock
.fd
, &a
.sa
, &sz
))
805 die(EXIT_FAILURE
, "couldn't read port number: %s", strerror(errno
));
806 assert(a
.sa
.sa_family
== AF_INET
);
807 return (ntohs(a
.sin
.sin_port
));
810 /* --- @p_keepalive@ --- *
812 * Arguments: @struct timeval *now@ = the current time
813 * @void *pv@ = peer to wake up
817 * Use: Sends a keepalive ping message to its peer.
820 static void p_keepalive(struct timeval
*now
, void *pv
)
824 p_txstart(p
, MSG_MISC
| MISC_NOP
); p_dotxend(p
);
825 T( trace(T_PEER
, "peer: sent keepalive to %s", p
->spec
.name
); )
829 /* --- @p_setkatimer@ --- *
831 * Arguments: @peer *p@ = peer to set
835 * Use: Resets the keepalive timer thing.
838 static void p_setkatimer(peer
*p
)
844 gettimeofday(&tv
, 0);
845 tv
.tv_sec
+= p
->spec
.t_ka
;
846 sel_addtimer(&sel
, &p
->tka
, &tv
, p_keepalive
, p
);
849 /* --- @p_create@ --- *
851 * Arguments: @peerspec *spec@ = information about this peer
853 * Returns: Pointer to the peer block, or null if it failed.
855 * Use: Creates a new named peer block. No peer is actually attached
859 peer
*p_create(peerspec
*spec
)
861 peer
*p
= CREATE(peer
);
862 const tunnel_ops
*tops
= spec
->tops
;
866 p
->byname
= sym_find(&byname
, spec
->name
, -1, sizeof(peer_byname
), &f
);
868 p
->byaddr
= am_find(&byaddr
, &spec
->sa
, sizeof(peer_byaddr
), &f
);
870 p
->byname
->p
= p
->byaddr
->p
= p
;
872 T( trace(T_PEER
, "peer: creating new peer `%s'", spec
->name
); )
874 p
->spec
.name
= (/*unconst*/ char *)SYM_NAME(p
->byname
);
875 if (spec
->tag
) p
->spec
.tag
= xstrdup(spec
->tag
);
876 if (spec
->privtag
) p
->spec
.privtag
= xstrdup(spec
->privtag
);
880 memset(&p
->st
, 0, sizeof(stats
));
881 p
->st
.t_start
= time(0);
882 if (!(tops
->flags
& TUNF_PRIVOPEN
))
884 else if ((fd
= ps_tunfd(tops
, &p
->ifname
)) < 0)
886 if ((p
->t
= tops
->create(p
, fd
, &p
->ifname
)) == 0)
888 T( trace(T_TUNNEL
, "peer: attached interface %s to peer `%s'",
889 p
->ifname
, p_name(p
)); )
891 if (kx_init(&p
->kx
, p
, &p
->ks
, p
->spec
.f
& PSF_KXMASK
))
896 "?ADDR", &p
->spec
.sa
,
898 if (!(p
->spec
.f
& KXF_CORK
)) {
899 a_notify("KXSTART", "?PEER", p
, A_END
);
900 /* Couldn't tell anyone before */
902 if (p
->spec
.f
& PSF_MOBILE
) nmobile
++;
906 if (spec
->t_ka
) sel_rmtimer(&p
->tka
);
908 p
->t
->ops
->destroy(p
->t
);
910 if (fd
>= 0) close(fd
);
912 am_remove(&byaddr
, p
->byaddr
);
913 if (p
->spec
.tag
) xfree(p
->spec
.tag
);
914 if (p
->spec
.privtag
) xfree(p
->spec
.privtag
);
916 sym_remove(&byname
, p
->byname
);
922 /* --- @p_name@ --- *
924 * Arguments: @peer *p@ = pointer to a peer block
926 * Returns: A pointer to the peer's name.
929 const char *p_name(peer
*p
)
930 { if (p
) return (p
->spec
.name
); else return ("-"); }
934 * Arguments: @peer *p@ = pointer to a peer block
936 * Returns: A pointer to the peer's public key tag.
939 const char *p_tag(peer
*p
)
940 { return (p
->spec
.tag ? p
->spec
.tag
: p
->spec
.name
); }
942 /* --- @p_privtag@ --- *
944 * Arguments: @peer *p@ = pointer to a peer block
946 * Returns: A pointer to the peer's private key tag.
949 const char *p_privtag(peer
*p
)
950 { return (p
->spec
.privtag ? p
->spec
.privtag
: tag_priv
); }
952 /* --- @p_spec@ --- *
954 * Arguments: @peer *p@ = pointer to a peer block
956 * Returns: Pointer to the peer's specification
959 const peerspec
*p_spec(peer
*p
) { return (&p
->spec
); }
961 /* --- @p_findbyaddr@ --- *
963 * Arguments: @const addr *a@ = address to look up
965 * Returns: Pointer to the peer block, or null if not found.
967 * Use: Finds a peer by address.
970 peer
*p_findbyaddr(const addr
*a
)
974 if ((pa
= am_find(&byaddr
, a
, 0, 0)) != 0) {
981 /* --- @p_find@ --- *
983 * Arguments: @const char *name@ = name to look up
985 * Returns: Pointer to the peer block, or null if not found.
987 * Use: Finds a peer by name.
990 peer
*p_find(const char *name
)
994 if ((pn
= sym_find(&byname
, name
, -1, 0, 0)) != 0)
999 /* --- @p_destroy@ --- *
1001 * Arguments: @peer *p@ = pointer to a peer
1005 * Use: Destroys a peer.
1008 void p_destroy(peer
*p
)
1012 T( trace(T_PEER
, "peer: destroying peer `%s'", p
->spec
.name
); )
1013 a_notify("KILL", "%s", p
->spec
.name
, A_END
);
1016 if (p
->spec
.f
& PSF_MOBILE
) nmobile
--;
1017 if (p
->ifname
) xfree(p
->ifname
);
1018 if (p
->spec
.tag
) xfree(p
->spec
.tag
);
1019 if (p
->spec
.privtag
) xfree(p
->spec
.privtag
);
1020 p
->t
->ops
->destroy(p
->t
);
1021 if (p
->spec
.t_ka
) sel_rmtimer(&p
->tka
);
1022 for (pg
= p
->pings
; pg
; pg
= ppg
) {
1024 p_pingdone(pg
, PING_PEERDIED
);
1026 sym_remove(&byname
, p
->byname
);
1027 am_remove(&byaddr
, p
->byaddr
);
1031 /* --- @p_mkiter@ --- *
1033 * Arguments: @peer_iter *i@ = pointer to an iterator
1037 * Use: Initializes the iterator.
1040 void p_mkiter(peer_iter
*i
) { sym_mkiter(&i
->i
, &byname
); }
1042 /* --- @p_next@ --- *
1044 * Arguments: @peer_iter *i@ = pointer to an iterator
1046 * Returns: Next peer, or null if at the end.
1048 * Use: Returns the next peer.
1051 peer
*p_next(peer_iter
*i
)
1055 if ((pn
= sym_next(&i
->i
)) == 0)
1060 /*----- That's all, folks -------------------------------------------------*/