static sym_table byname;
static addrmap byaddr;
static unsigned nmobile;
-
-/*----- Tunnel table ------------------------------------------------------*/
-
-const tunnel_ops *tunnels[] = {
-#ifdef TUN_LINUX
- &tun_linux,
-#endif
-#ifdef TUN_BSD
- &tun_bsd,
-#endif
-#ifdef TUN_UNET
- &tun_unet,
-#endif
- &tun_slip,
- 0
-}, *tun_default;
+static struct tunnel_node {
+ struct tunnel_node *next;
+ const tunnel_ops *tops;
+} *tunnels, **tunnels_tail = &tunnels;
+const tunnel_ops *dflttun;
/*----- Main code ---------------------------------------------------------*/
*
* Arguments: @struct addrinfo *ailist@ = addresses to bind to
*
- * Returns: ---
+ * Returns: Zero on success, @-1@ on failure.
*
- * Use: Initializes the peer system; creates the socket.
+ * Use: Binds to the main UDP sockets.
*/
-void p_bind(struct addrinfo *ailist)
+int p_bind(struct addrinfo *ailist)
{
- int fd;
+ int fd = -1;
int len = PKBUFSZ;
int yes = 1;
int i;
if ((fd = socket(ai->ai_family, SOCK_DGRAM, 0)) < 0) {
a_warn("PEER", "-", "udp-socket", "%s", aftab[i].name,
"create-failed", "?ERRNO", A_END);
- exit(EXIT_FAILURE);
+ goto fail;
}
if (i == AFIX_INET6 &&
setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &yes, sizeof(yes))) {
a_warn("PEER", "-", "udp-socket", "%s", aftab[i].name,
"set-v6only-failed", "?ERRNO", A_END);
- exit(EXIT_FAILURE);
+ goto fail;
}
assert(ai->ai_addrlen <= sizeof(a));
memcpy(&a, ai->ai_addr, ai->ai_addrlen);
if (bind(fd, &a.sa, addrsz(&a))) {
a_warn("PEER", "-", "udp-socket", "%s", aftab[i].name,
"bind-failed", "?ERRNO", A_END);
- exit(EXIT_FAILURE);
+ goto fail;
}
if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, sizeof(len)) ||
setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &len, sizeof(len))) {
a_warn("PEER", "-", "udp-socket", "%s", aftab[i].name,
"set-buffers-failed", "?ERRNO", A_END);
- exit(EXIT_FAILURE);
+ goto fail;
}
fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
- sel_initfile(&sel, &udpsock[i].sf, fd, SEL_READ, p_read, 0);
- sel_addfile(&udpsock[i].sf);
- T( trace(T_PEER, "peer: created %s socket", aftab[i].name); )
if (port)
udpsock[i].port = port;
else {
if (getsockname(fd, &a.sa, &sz)) {
a_warn("PEER", "-", "udp-socket", "%s", aftab[i].name,
"read-local-address-failed", "?ERRNO", A_END);
- exit(EXIT_FAILURE);
+ goto fail;
}
udpsock[i].port = lastport = getport(&a);
}
+ T( trace(T_PEER, "peer: created %s socket", aftab[i].name); )
+ sel_initfile(&sel, &udpsock[i].sf, fd, SEL_READ, p_read, 0);
+ sel_addfile(&udpsock[i].sf);
+ fd = -1;
}
+ return (0);
+
+fail:
+ if (fd != -1) close(fd);
+ p_unbind();
+ return (-1);
+}
+
+/* --- @p_unbind@ --- *
+ *
+ * Arguments: ---
+ *
+ * Returns: ---
+ *
+ * Use: Unbinds the UDP sockets. There must not be any active peers,
+ * and none can be created until the sockets are rebound.
+ */
+
+void p_unbind(void)
+{
+ int i;
+
+#ifndef NDEBUG
+ { peer_iter it; p_mkiter(&it); assert(!p_next(&it)); }
+#endif
+
+ for (i = 0; i < NADDRFAM; i++) {
+ if (udpsock[i].sf.fd == -1) continue;
+ sel_rmfile(&udpsock[i].sf);
+ close(udpsock[i].sf.fd);
+ udpsock[i].sf.fd = -1;
+ }
}
/* --- @p_init@ --- *
am_create(&byaddr);
}
+/* --- @p_addtun@ --- *
+ *
+ * Arguments: @const tunnel_ops *tops@ = tunnel ops to add
+ *
+ * Returns: Zero on success, @-1@ on failure.
+ *
+ * Use: Adds a tunnel class to the list of known classes, if it
+ * initializes properly. If there is no current default tunnel,
+ * then this one is made the default.
+ *
+ * Does nothing if the tunnel class is already known. So adding
+ * a bunch of tunnels takes quadratic time, but there will be
+ * too few to care about.
+ */
+
+int p_addtun(const tunnel_ops *tops)
+{
+ struct tunnel_node *tn;
+
+ for (tn = tunnels; tn; tn = tn->next)
+ if (tn->tops == tops) return (0);
+ if (tops->init()) return (-1);
+ tn = CREATE(struct tunnel_node);
+ tn->next = 0; tn->tops = tops;
+ *tunnels_tail = tn; tunnels_tail = &tn->next;
+ if (!dflttun) dflttun = tops;
+ return (0);
+}
+
+/* --- @p_setdflttun@ --- *
+ *
+ * Arguments: @const tunnel_ops *tops@ = tunnel ops to set
+ *
+ * Returns: ---
+ *
+ * Use: Sets the default tunnel. It must already be registered. The
+ * old default is forgotten.
+ */
+
+void p_setdflttun(const tunnel_ops *tops)
+ { dflttun = tops; }
+
+/* --- @p_dflttun@ --- *
+ *
+ * Arguments: ---
+ *
+ * Returns: A pointer to the current default tunnel operations, or null
+ * if no tunnels are defined.
+ */
+
+const tunnel_ops *p_dflttun(void) { return (dflttun); }
+
+/* --- @p_findtun@ --- *
+ *
+ * Arguments: @const char *name@ = tunnel name
+ *
+ * Returns: Pointer to the tunnel operations, or null.
+ *
+ * Use: Finds the operations for a named tunnel class.
+ */
+
+const tunnel_ops *p_findtun(const char *name)
+{
+ const struct tunnel_node *tn;
+
+ for (tn = tunnels; tn; tn = tn->next)
+ if (mystrieq(tn->tops->name, name) == 0) return (tn->tops);
+ return (0);
+}
+
+/* --- @p_mktuniter@ --- *
+ *
+ * Arguments: @tuniter *i@ = pointer to iterator to initialize
+ *
+ * Returns: ---
+ *
+ * Use: Initializes a tunnel iterator.
+ */
+
+void p_mktuniter(tun_iter *i) { i->next = tunnels; }
+
+/* --- @p_nexttun@ --- *
+ *
+ * Arguments: @tuniter *i@ = pointer to iterator
+ *
+ * Returns: Pointer to the next tunnel's operations, or null.
+ */
+
+const tunnel_ops *p_nexttun(tun_iter *i)
+{
+ const struct tunnel_node *tn = i->next;
+
+ if (!tn) return (0);
+ else { i->next = tn->next; return (tn->tops); }
+}
+
/* --- @p_keepalive@ --- *
*
* Arguments: @struct timeval *now@ = the current time
T( trace(T_TUNNEL, "peer: attached interface %s to peer `%s'",
p->ifname, p_name(p)); )
p_setkatimer(p);
+ iv_addreason();
if (kx_setup(&p->kx, p, &p->ks, p->spec.f & PSF_KXMASK))
goto tidy_4;
a_notify("ADD",
if (spec->t_ka) sel_rmtimer(&p->tka);
xfree(p->ifname);
p->t->ops->destroy(p->t);
+ iv_rmreason();
tidy_3:
if (fd >= 0) close(fd);
tidy_2:
}
sym_remove(&byname, p->byname);
am_remove(&byaddr, p->byaddr);
+ iv_rmreason();
DESTROY(p);
}
+/* --- @p_destroyall@ --- *
+ *
+ * Arguments: ---
+ *
+ * Returns: ---
+ *
+ * Use: Destroys all of the peers, saying goodbye.
+ */
+
+void p_destroyall(void) { FOREACH_PEER(p, { p_destroy(p, 1); }); }
+
/* --- @p_mkiter@ --- *
*
* Arguments: @peer_iter *i@ = pointer to an iterator