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-rw-r--r--keyexchange/isakmpd-20041012/udp.c573
1 files changed, 0 insertions, 573 deletions
diff --git a/keyexchange/isakmpd-20041012/udp.c b/keyexchange/isakmpd-20041012/udp.c
deleted file mode 100644
index 090297b..0000000
--- a/keyexchange/isakmpd-20041012/udp.c
+++ /dev/null
@@ -1,573 +0,0 @@
-/* $OpenBSD: udp.c,v 1.79 2004/08/08 19:11:06 deraadt Exp $ */
-/* $EOM: udp.c,v 1.57 2001/01/26 10:09:57 niklas Exp $ */
-
-/*
- * Copyright (c) 1998, 1999, 2001 Niklas Hallqvist. All rights reserved.
- * Copyright (c) 2000 Angelos D. Keromytis. All rights reserved.
- * Copyright (c) 2003, 2004 Håkan Olsson. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * This code was written under funding by Ericsson Radio Systems.
- */
-
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#ifndef linux
-#include <sys/sockio.h>
-#endif
-#include <net/if.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <ctype.h>
-#include <err.h>
-#include <limits.h>
-#include <netdb.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "sysdep.h"
-
-#include "conf.h"
-#include "if.h"
-#include "isakmp.h"
-#include "log.h"
-#include "message.h"
-#include "monitor.h"
-#include "sysdep.h"
-#include "transport.h"
-#include "udp.h"
-#include "util.h"
-#include "virtual.h"
-
-#define UDP_SIZE 65536
-
-/* If a system doesn't have SO_REUSEPORT, SO_REUSEADDR will have to do. */
-#ifndef SO_REUSEPORT
-#define SO_REUSEPORT SO_REUSEADDR
-#endif
-
-/* These are reused by udp_encap.c, thus not 'static' here. */
-struct transport *udp_clone(struct transport *, struct sockaddr *);
-int udp_fd_set(struct transport *, fd_set *, int);
-int udp_fd_isset(struct transport *, fd_set *);
-void udp_get_dst(struct transport *, struct sockaddr **);
-void udp_get_src(struct transport *, struct sockaddr **);
-char *udp_decode_ids(struct transport *);
-void udp_remove(struct transport *);
-
-static struct transport *udp_create(char *);
-static void udp_report(struct transport *);
-static void udp_handle_message(struct transport *);
-static struct transport *udp_make(struct sockaddr *);
-static int udp_send_message(struct message *, struct transport *);
-#if 0
-static in_port_t udp_decode_port(char *);
-#endif
-
-static struct transport_vtbl udp_transport_vtbl = {
- {0}, "udp_physical",
- udp_create,
- 0,
- udp_remove,
- udp_report,
- udp_fd_set,
- udp_fd_isset,
- udp_handle_message,
- udp_send_message,
- udp_get_dst,
- udp_get_src,
- udp_decode_ids,
- udp_clone,
- 0
-};
-
-char *udp_default_port = 0;
-char *udp_bind_port = 0;
-int bind_family = 0;
-
-void
-udp_init(void)
-{
- transport_method_add(&udp_transport_vtbl);
-}
-
-/* Create a UDP transport structure bound to LADDR just for listening. */
-static struct transport *
-udp_make(struct sockaddr *laddr)
-{
- struct udp_transport *t = 0;
- int s, on, wildcardaddress = 0;
- char *tstr;
-
- t = calloc(1, sizeof *t);
- if (!t) {
- log_print("udp_make: calloc (1, %lu) failed",
- (unsigned long)sizeof *t);
- free(laddr);
- return 0;
- }
- t->src = laddr;
-
- s = socket(laddr->sa_family, SOCK_DGRAM, IPPROTO_UDP);
- if (s == -1) {
- log_error("udp_make: socket (%d, %d, %d)", laddr->sa_family,
- SOCK_DGRAM, IPPROTO_UDP);
- goto err;
- }
- /* Make sure we don't get our traffic encrypted. */
- if (sysdep_cleartext(s, laddr->sa_family) == -1)
- goto err;
-
- /* Wildcard address ? */
- switch (laddr->sa_family) {
- case AF_INET:
- if (((struct sockaddr_in *)laddr)->sin_addr.s_addr ==
- INADDR_ANY)
- wildcardaddress = 1;
- break;
- case AF_INET6:
- if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)laddr)->sin6_addr))
- wildcardaddress = 1;
- break;
- }
-
- /*
- * In order to have several bound specific address-port combinations
- * with the same port SO_REUSEADDR is needed. If this is a wildcard
- * socket and we are not listening there, but only sending from it
- * make sure it is entirely reuseable with SO_REUSEPORT.
- */
- on = 1;
- if (setsockopt(s, SOL_SOCKET,
- wildcardaddress ? SO_REUSEPORT : SO_REUSEADDR,
- (void *)&on, sizeof on) == -1) {
- log_error("udp_make: setsockopt (%d, %d, %d, %p, %lu)", s,
- SOL_SOCKET, wildcardaddress ? SO_REUSEPORT : SO_REUSEADDR,
- &on, (unsigned long)sizeof on);
- goto err;
- }
- t->transport.vtbl = &udp_transport_vtbl;
- if (monitor_bind(s, t->src, sysdep_sa_len(t->src))) {
- if (sockaddr2text(t->src, &tstr, 0))
- log_error("udp_make: bind (%d, %p, %lu)", s, &t->src,
- (unsigned long)sizeof t->src);
- else {
- log_error("udp_make: bind (%d, %s, %lu)", s, tstr,
- (unsigned long)sizeof t->src);
- free(tstr);
- }
- goto err;
- }
- t->s = s;
- if (sockaddr2text(t->src, &tstr, 0))
- LOG_DBG((LOG_MISC, 20, "udp_make: "
- "transport %p socket %d family %d", t, s,
- t->src->sa_family == AF_INET ? 4 : 6));
- else {
- LOG_DBG((LOG_MISC, 20, "udp_make: "
- "transport %p socket %d ip %s port %d", t, s,
- tstr, ntohs(sockaddr_port(t->src))));
- free (tstr);
- }
- transport_setup(&t->transport, 0);
- t->transport.flags |= TRANSPORT_LISTEN;
- return &t->transport;
-
-err:
- if (s >= 0)
- close(s);
- if (t) {
- /* Already closed. */
- t->s = -1;
- udp_remove(&t->transport);
- }
- return 0;
-}
-
-/* Clone a listen transport U, record a destination RADDR for outbound use. */
-struct transport *
-udp_clone(struct transport *ut, struct sockaddr *raddr)
-{
- struct udp_transport *u = (struct udp_transport *)ut;
- struct udp_transport *u2;
- struct transport *t;
-
- t = malloc(sizeof *u);
- if (!t) {
- log_error("udp_clone: malloc (%lu) failed",
- (unsigned long)sizeof *u);
- return 0;
- }
- u2 = (struct udp_transport *)t;
-
- memcpy(u2, u, sizeof *u);
-
- u2->src = malloc(sysdep_sa_len(u->src));
- if (!u2->src) {
- log_error("udp_clone: malloc (%d) failed",
- sysdep_sa_len(u->src));
- free(t);
- return 0;
- }
- memcpy(u2->src, u->src, sysdep_sa_len(u->src));
-
- u2->dst = malloc(sysdep_sa_len(raddr));
- if (!u2->dst) {
- log_error("udp_clone: malloc (%d) failed",
- sysdep_sa_len(raddr));
- free(u2->src);
- free(t);
- return 0;
- }
- memcpy(u2->dst, raddr, sysdep_sa_len(raddr));
-
- t->flags &= ~TRANSPORT_LISTEN;
- transport_setup(t, 0);
- return t;
-}
-
-/*
- * Initialize an object of the UDP transport class. Fill in the local
- * IP address and port information and create a server socket bound to
- * that specific port. Add the polymorphic transport structure to the
- * system-wide pools of known ISAKMP transports.
- */
-struct transport *
-udp_bind(const struct sockaddr *addr)
-{
- struct sockaddr *src;
-
- src = malloc(sysdep_sa_len((struct sockaddr *)addr));
- if (!src)
- return 0;
-
- memcpy(src, addr, sysdep_sa_len((struct sockaddr *)addr));
- return udp_make(src);
-}
-
-/*
- * NAME is a section name found in the config database. Setup and return
- * a transport useable to talk to the peer specified by that name.
- */
-static struct transport *
-udp_create(char *name)
-{
- struct virtual_transport *v;
- struct udp_transport *u;
- struct transport *rv, *t;
- struct sockaddr *dst, *addr;
- char *addr_str, *port_str;
- struct conf_list *addr_list = 0;
- struct conf_list_node *addr_node;
-
- port_str = conf_get_str(name, "Port");
- if (!port_str)
- port_str = udp_default_port;
- if (!port_str)
- port_str = UDP_DEFAULT_PORT_STR;
-
- addr_str = conf_get_str(name, "Address");
- if (!addr_str) {
- log_print("udp_create: no address configured for \"%s\"",
- name);
- return 0;
- }
- if (text2sockaddr(addr_str, port_str, &dst)) {
- log_print("udp_create: address \"%s\" not understood",
- addr_str);
- return 0;
- }
- addr_str = conf_get_str(name, "Local-address");
- if (!addr_str)
- addr_list = conf_get_list("General", "Listen-on");
- if (!addr_str && !addr_list) {
- v = virtual_get_default(dst->sa_family);
- u = (struct udp_transport *)v->main;
-
- if (!u) {
- log_print("udp_create: no default transport");
- rv = 0;
- goto ret;
- } else {
- rv = udp_clone((struct transport *)u, dst);
- if (rv)
- rv->vtbl = &udp_transport_vtbl;
- goto ret;
- }
- }
-
- if (addr_list) {
- for (addr_node = TAILQ_FIRST(&addr_list->fields);
- addr_node; addr_node = TAILQ_NEXT(addr_node, link))
- if (text2sockaddr(addr_node->field, port_str, &addr)
- == 0) {
- v = virtual_listen_lookup(addr);
- free(addr);
- if (v) {
- addr_str = addr_node->field;
- break;
- }
- }
- if (!addr_str) {
- log_print("udp_create: no matching listener found");
- rv = 0;
- goto ret;
- }
- }
- if (text2sockaddr(addr_str, port_str, &addr)) {
- log_print("udp_create: address \"%s\" not understood",
- addr_str);
- rv = 0;
- goto ret;
- }
-
- v = virtual_listen_lookup(addr);
- free(addr);
- if (!v) {
- log_print("udp_create: %s:%s must exist as a listener too",
- addr_str, port_str);
- rv = 0;
- goto ret;
- }
- t = (struct transport *)v;
- rv = udp_clone(v->main, dst);
- if (rv)
- rv->vtbl = &udp_transport_vtbl;
-
-ret:
- if (addr_list)
- conf_free_list(addr_list);
- free(dst);
- return rv;
-}
-
-void
-udp_remove(struct transport *t)
-{
- struct udp_transport *u = (struct udp_transport *)t;
-
- if (u->src)
- free(u->src);
- if (u->dst)
- free(u->dst);
- if ((t->flags & TRANSPORT_LISTEN) && u->s >= 0)
- close(u->s);
- if (t->link.le_prev)
- LIST_REMOVE(t, link);
-
- LOG_DBG((LOG_TRANSPORT, 90, "udp_remove: removed transport %p", t));
- free(t);
-}
-
-/* Report transport-method specifics of the T transport. */
-void
-udp_report(struct transport *t)
-{
- struct udp_transport *u = (struct udp_transport *)t;
- char *src = NULL, *dst = NULL;
- in_port_t sport, dport;
-
- if (sockaddr2text(u->src, &src, 0))
- goto ret;
- sport = sockaddr_port(u->src);
-
- if (!u->dst || sockaddr2text(u->dst, &dst, 0))
- dst = 0;
- dport = dst ? sockaddr_port(u->dst) : 0;
-
- LOG_DBG((LOG_REPORT, 0, "udp_report: fd %d src %s:%u dst %s:%u", u->s,
- src, ntohs(sport), dst ? dst : "<none>", ntohs(dport)));
-
-ret:
- if (dst)
- free(dst);
- if (src)
- free(src);
-}
-
-/*
- * A message has arrived on transport T's socket. If T is single-ended,
- * clone it into a double-ended transport which we will use from now on.
- * Package the message as we want it and continue processing in the message
- * module.
- */
-static void
-udp_handle_message(struct transport *t)
-{
- struct udp_transport *u = (struct udp_transport *)t;
- u_int8_t buf[UDP_SIZE];
- struct sockaddr_storage from;
- u_int32_t len = sizeof from;
- ssize_t n;
- struct message *msg;
-
- n = recvfrom(u->s, buf, UDP_SIZE, 0, (struct sockaddr *)&from, &len);
- if (n == -1) {
- log_error("recvfrom (%d, %p, %d, %d, %p, %p)", u->s, buf,
- UDP_SIZE, 0, &from, &len);
- return;
- }
- /*
- * Make a specialized UDP transport structure out of the incoming
- * transport and the address information we got from recvfrom(2).
- */
- t = t->virtual->vtbl->clone(t->virtual, (struct sockaddr *)&from);
- if (!t)
- return;
-
- msg = message_alloc(t, buf, n);
- if (!msg) {
- log_error("failed to allocate message structure, dropping "
- "packet received on transport %p", u);
- t->vtbl->remove(t);
- return;
- }
- message_recv(msg);
-}
-
-/* Physically send the message MSG over its associated transport. */
-static int
-udp_send_message(struct message *msg, struct transport *t)
-{
- struct udp_transport *u = (struct udp_transport *)t;
- ssize_t n;
- struct msghdr m;
-
- /*
- * Sending on connected sockets requires that no destination address is
- * given, or else EISCONN will occur.
- */
- m.msg_name = (caddr_t) u->dst;
- m.msg_namelen = sysdep_sa_len(u->dst);
- m.msg_iov = msg->iov;
- m.msg_iovlen = msg->iovlen;
- m.msg_control = 0;
- m.msg_controllen = 0;
- m.msg_flags = 0;
- n = sendmsg(u->s, &m, 0);
- if (n == -1) {
- /* XXX We should check whether the address has gone away */
- log_error("sendmsg (%d, %p, %d)", u->s, &m, 0);
- return -1;
- }
- return 0;
-}
-
-int
-udp_fd_set(struct transport *t, fd_set *fds, int bit)
-{
- struct udp_transport *u = (struct udp_transport *)t;
-
- if (bit)
- FD_SET(u->s, fds);
- else
- FD_CLR(u->s, fds);
-
- return u->s + 1;
-}
-
-int
-udp_fd_isset(struct transport *t, fd_set *fds)
-{
- struct udp_transport *u = (struct udp_transport *)t;
-
- return FD_ISSET(u->s, fds);
-}
-
-/*
- * Get transport T's peer address and stuff it into the sockaddr pointed
- * to by DST.
- */
-void
-udp_get_dst(struct transport *t, struct sockaddr **dst)
-{
- *dst = ((struct udp_transport *)t)->dst;
-}
-
-/*
- * Get transport T's local address and stuff it into the sockaddr pointed
- * to by SRC. Put its length into SRC_LEN.
- */
-void
-udp_get_src(struct transport *t, struct sockaddr **src)
-{
- *src = ((struct udp_transport *)t)->src;
-}
-
-char *
-udp_decode_ids(struct transport *t)
-{
- struct sockaddr *src, *dst;
- static char result[1024];
- char idsrc[256], iddst[256];
-
- t->vtbl->get_src(t, &src);
- t->vtbl->get_dst(t, &dst);
-
- if (getnameinfo(src, sysdep_sa_len(src), idsrc, sizeof idsrc, NULL, 0,
- NI_NUMERICHOST) != 0) {
- log_print("udp_decode_ids: getnameinfo () failed for 'src'");
- strlcpy(idsrc, "<error>", 256);
- }
- if (getnameinfo(dst, sysdep_sa_len(dst), iddst, sizeof iddst, NULL, 0,
- NI_NUMERICHOST) != 0) {
- log_print("udp_decode_ids: getnameinfo () failed for 'dst'");
- strlcpy(iddst, "<error>", 256);
- }
-
- snprintf(result, sizeof result, "src: %s dst: %s", idsrc, iddst);
- return result;
-}
-
-#if 0
-/*
- * Take a string containing an ext representation of port and return a
- * binary port number in host byte order. Return zero if anything goes wrong.
- * XXX Currently unused.
- */
-static in_port_t
-udp_decode_port(char *port_str)
-{
- char *port_str_end;
- long port_long;
- struct servent *service;
-
- port_long = ntohl(strtol(port_str, &port_str_end, 0));
- if (port_str == port_str_end) {
- service = getservbyname(port_str, "udp");
- if (!service) {
- log_print("udp_decode_port: service \"%s\" unknown",
- port_str);
- return 0;
- }
- return ntohs(service->s_port);
- } else if (port_long < 1 || port_long > 65535) {
- log_print("udp_decode_port: port %ld out of range", port_long);
- return 0;
- }
- return port_long;
-}
-#endif
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