*
* This file is part of Trivial IP Encryption (TrIPE).
*
- * TrIPE is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * TrIPE is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 3 of the License, or (at your
+ * option) any later version.
*
- * TrIPE is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * TrIPE is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
*
* You should have received a copy of the GNU General Public License
- * along with TrIPE; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * along with TrIPE. If not, see <https://www.gnu.org/licenses/>.
*/
/*----- Header files ------------------------------------------------------*/
#include "tripe.h"
+/*----- Global state ------------------------------------------------------*/
+
+sel_file udpsock[NADDRFAM];
+
/*----- Static variables --------------------------------------------------*/
static sym_table byname;
static addrmap byaddr;
-static sel_file sock;
static unsigned nmobile;
/*----- Tunnel table ------------------------------------------------------*/
return (err);
}
+/* --- @p_updateaddr@ --- *
+ *
+ * Arguments: @peer *p@ = pointer to peer block
+ * @const addr *a@ = address to associate with this peer
+ *
+ * Returns: Zero if the address was changed; @+1@ if it was already
+ * right.
+ *
+ * Use: Updates our idea of @p@'s address.
+ */
+
+int p_updateaddr(peer *p, const addr *a)
+{
+ peer *q;
+ peer_byaddr *pa, *qa;
+ int ix;
+ unsigned f;
+
+ /* --- Figure out how to proceed --- *
+ *
+ * If this address already belongs to a different peer, then swap the
+ * addresses over. This doesn't leave the displaced peer in an especially
+ * good state, but it ought to get sorted out soon enough.
+ */
+
+ pa = am_find(&byaddr, a, sizeof(peer_byaddr), &f);
+ if (f && pa->p == p)
+ return (+1);
+ else if (!f) {
+ T( trace(T_PEER, "peer: updating address for `%s'", p_name(p)); )
+ am_remove(&byaddr, p->byaddr);
+ p->byaddr = pa; p->spec.sa = *a; pa->p = p;
+ p->afix = afix(p->spec.sa.sa.sa_family); assert(p->afix >= 0);
+ a_notify("NEWADDR", "?PEER", p, "?ADDR", a, A_END);
+ return (0);
+ } else {
+ q = pa->p; qa = p->byaddr;
+ T( trace(T_PEER, "peer: swapping addresses for `%s' and `%s'",
+ p_name(p), p_name(q)); )
+ q->byaddr = qa; qa->p = q; q->spec.sa = p->spec.sa;
+ p->byaddr = pa; pa->p = p; p->spec.sa = *a;
+ ix = p->afix; p->afix = q->afix; q->afix = ix;
+ a_notify("NEWADDR", "?PEER", p, "?ADDR", a, A_END);
+ a_notify("NEWADDR", "?PEER", q, "?ADDR", &q->spec.sa, A_END);
+ return (0);
+ }
+}
+
/* --- @p_decrypt@ --- *
*
* Arguments: @peer **pp@ = pointer to peer to decrypt message from
int ty, buf *bin, buf *bout)
{
peer *p, *q;
- peer_byaddr *pa, *qa;
int err = KSERR_DECRYPT;
- unsigned f;
/* --- If we have a match on the source address then try that first --- */
return (-1);
}
- /* --- We found one that accepted, so update the peer's address --- *
- *
- * If we had an initial guess of which peer this packet came from -- i.e.,
- * @q@ is not null -- then swap the addresses over. This doesn't leave the
- * evicted peer in an especially good state, but it ought to get sorted out
- * soon enough.
- */
+ /* --- We found one that accepted, so update the peer's address --- */
if (!err) {
*pp = p;
- if (!q) {
- T( trace(T_PEER, "peer: updating address for `%s'", p_name(p)); )
- pa = am_find(&byaddr, a, sizeof(peer_byaddr), &f); assert(!f);
- am_remove(&byaddr, p->byaddr);
- p->byaddr = pa;
- pa->p = p;
- p->spec.sa = *a;
- a_notify("NEWADDR", "?PEER", p, "?ADDR", a, A_END);
- } else {
- T( trace(T_PEER, "peer: swapping addresses for `%s' and `%s'",
- p_name(p), p_name(q)); )
- pa = p->byaddr; qa = q->byaddr;
- pa->p = q; q->byaddr = pa; q->spec.sa = p->spec.sa;
- qa->p = p; p->byaddr = qa; p->spec.sa = *a;
- a_notify("NEWADDR", "?PEER", p, "?ADDR", a, A_END);
- a_notify("NEWADDR", "?PEER", q, "?ADDR", &q->spec.sa, A_END);
- }
+ p_updateaddr(p, a);
}
match:
ssize_t n;
int ch;
buf b, bb;
+#ifndef NTRACE
+ int ix = -1;
+ char name[NI_MAXHOST], svc[NI_MAXSERV];
+#endif
/* --- Read the data --- */
- TIMER;
+ QUICKRAND;
sz = sizeof(addr);
n = recvfrom(fd, buf_i, sizeof(buf_i), 0, &a.sa, &sz);
if (n < 0) {
a_warn("PEER", "-", "socket-read-error", "?ERRNO", A_END);
return;
}
+ IF_TRACING(T_PEER, {
+ ix = afix(a.sa.sa_family);
+ getnameinfo(&a.sa, sz, name, sizeof(name), svc, sizeof(svc),
+ NI_NUMERICHOST | NI_NUMERICSERV);
+ })
/* --- If the packet is a greeting, don't check peers --- */
if (n && buf_i[0] == (MSG_MISC | MISC_GREET)) {
IF_TRACING(T_PEER, {
- trace(T_PEER, "peer: greeting received from INET %s %u",
- inet_ntoa(a.sin.sin_addr),
- (unsigned)ntohs(a.sin.sin_port));
+ trace(T_PEER, "peer: greeting received from %s %s %s",
+ aftab[ix].name, name, svc);
trace_block(T_PACKET, "peer: greeting contents", buf_i, n);
})
buf_init(&b, buf_i, n);
IF_TRACING(T_PEER, {
if (p) {
trace(T_PEER,
- "peer: packet received from `%s' from address INET %s %d",
- p_name(p), inet_ntoa(a.sin.sin_addr), ntohs(a.sin.sin_port));
+ "peer: packet received from `%s' from address %s %s %s",
+ p_name(p), aftab[ix].name, name, svc);
} else {
- trace(T_PEER, "peer: packet received from unknown address INET %s %d",
- inet_ntoa(a.sin.sin_addr), ntohs(a.sin.sin_port));
+ trace(T_PEER, "peer: packet received from unknown address %s %s %s",
+ aftab[ix].name, name, svc);
}
trace_block(T_PACKET, "peer: packet contents", buf_i, n);
})
static int p_dotxend(peer *p)
{
+ socklen_t sasz = addrsz(&p->spec.sa);
+
if (!BOK(&p->b)) {
a_warn("PEER", "?PEER", p, "packet-build-failed", A_END);
return (0);
}
IF_TRACING(T_PEER, trace_block(T_PACKET, "peer: sending packet",
BBASE(&p->b), BLEN(&p->b)); )
- if (sendto(sock.fd, BBASE(&p->b), BLEN(&p->b),
- 0, &p->spec.sa.sa, p->spec.sasz) < 0) {
+ if (sendto(udpsock[p->afix].fd, BBASE(&p->b), BLEN(&p->b),
+ 0, &p->spec.sa.sa, sasz) < 0) {
a_warn("PEER", "?PEER", p, "socket-write-error", "?ERRNO", A_END);
return (0);
} else {
{
buf *bb = p_txstart(p, MSG_PACKET);
- TIMER;
+ QUICKRAND;
p_encrypt(p, MSG_PACKET, b, bb);
if (BOK(bb) && BLEN(bb)) {
p->st.n_ipout++;
/* --- @p_init@ --- *
*
- * Arguments: @struct in_addr addr@ = address to bind to
- * @unsigned port@ = port number to listen to
+ * Arguments: @struct addrinfo *ailist@ = addresses to bind to
*
* Returns: ---
*
* Use: Initializes the peer system; creates the socket.
*/
-void p_init(struct in_addr addr, unsigned port)
+void p_init(struct addrinfo *ailist)
{
int fd;
- struct sockaddr_in sin;
int len = PKBUFSZ;
+ int i;
+ struct addrinfo *ai;
+ unsigned port, lastport = 0;
+ addr a;
+ socklen_t sz;
- /* --- Note on socket buffer sizes --- *
- *
- * For some bizarre reason, Linux 2.2 (at least) doubles the socket buffer
- * sizes I pass to @setsockopt@. I'm not putting special-case code here
- * for Linux: BSD (at least TCPv2) does what I tell it rather than second-
- * guessing me.
- */
-
- if ((fd = socket(PF_INET, SOCK_DGRAM, 0)) < 0)
- die(EXIT_FAILURE, "socket creation failed: %s", strerror(errno));
- BURN(sin);
- sin.sin_family = AF_INET;
- sin.sin_addr = addr;
- sin.sin_port = htons(port);
- if (bind(fd, (struct sockaddr *)&sin, sizeof(sin)))
- die(EXIT_FAILURE, "bind failed: %s", strerror(errno));
- if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, sizeof(len)) ||
- setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &len, sizeof(len))) {
- die(EXIT_FAILURE, "failed to set socket buffer sizes: %s",
- strerror(errno));
+ for (i = 0; i < NADDRFAM; i++) udpsock[i].fd = -1;
+
+ for (ai = ailist; ai; ai = ai->ai_next) {
+ if ((i = afix(ai->ai_family)) < 0) continue;
+ if (udpsock[i].fd != -1) continue;
+
+ /* --- Note on socket buffer sizes --- *
+ *
+ * For some bizarre reason, Linux 2.2 (at least) doubles the socket
+ * buffer sizes I pass to @setsockopt@. I'm not putting special-case
+ * code here for Linux: BSD (at least TCPv2) does what I tell it rather
+ * than second-guessing me.
+ */
+
+ if ((fd = socket(ai->ai_family, SOCK_DGRAM, 0)) < 0)
+ die(EXIT_FAILURE, "socket creation failed: %s", strerror(errno));
+ assert(ai->ai_addrlen <= sizeof(a));
+ memcpy(&a, ai->ai_addr, ai->ai_addrlen);
+ if ((port = getport(&a)) == 0 && lastport) setport(&a, lastport);
+ if (bind(fd, &a.sa, addrsz(&a)))
+ die(EXIT_FAILURE, "bind failed: %s", strerror(errno));
+ if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, sizeof(len)) ||
+ setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &len, sizeof(len))) {
+ die(EXIT_FAILURE, "failed to set socket buffer sizes: %s",
+ strerror(errno));
+ }
+ fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
+ sel_initfile(&sel, &udpsock[i], fd, SEL_READ, p_read, 0);
+ sel_addfile(&udpsock[i]);
+ T( trace(T_PEER, "peer: created %s socket", aftab[i].name); )
+ if (!port) {
+ sz = sizeof(a);
+ if (getsockname(fd, &a.sa, &sz)) {
+ die(EXIT_FAILURE, "failed to read local socket address: %s",
+ strerror(errno));
+ }
+ lastport = getport(&a);
+ }
}
- fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
- sel_initfile(&sel, &sock, fd, SEL_READ, p_read, 0);
- sel_addfile(&sock);
- T( trace(T_PEER, "peer: created socket"); )
sym_create(&byname);
am_create(&byaddr);
/* --- @p_port@ --- *
*
- * Arguments: ---
+ * Arguments: @int i@ = address family index to retrieve
*
* Returns: Port number used for socket.
*/
-unsigned p_port(void)
+unsigned p_port(int i)
{
addr a;
socklen_t sz = sizeof(addr);
- if (getsockname(sock.fd, &a.sa, &sz))
+ if (getsockname(udpsock[i].fd, &a.sa, &sz))
die(EXIT_FAILURE, "couldn't read port number: %s", strerror(errno));
- assert(a.sa.sa_family == AF_INET);
- return (ntohs(a.sin.sin_port));
+ return (getport(&a));
}
/* --- @p_keepalive@ --- *
p->ks = 0;
p->pings = 0;
p->ifname = 0;
+ p->afix = afix(p->spec.sa.sa.sa_family); assert(p->afix >= 0);
memset(&p->st, 0, sizeof(stats));
p->st.t_start = time(0);
if (!(tops->flags & TUNF_PRIVOPEN))
~mdw / tripe / blobdiff