diff options
Diffstat (limited to 'keyexchange/isakmpd-20041012/sysdep/linux/sysdep.c')
| -rw-r--r-- | keyexchange/isakmpd-20041012/sysdep/linux/sysdep.c | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/keyexchange/isakmpd-20041012/sysdep/linux/sysdep.c b/keyexchange/isakmpd-20041012/sysdep/linux/sysdep.c new file mode 100644 index 0000000..fc3b362 --- /dev/null +++ b/keyexchange/isakmpd-20041012/sysdep/linux/sysdep.c @@ -0,0 +1,226 @@ +/* $OpenBSD: sysdep.c,v 1.16 2004/08/10 15:59:10 ho Exp $ */ + +/* + * Copyright (c) 1998, 1999 Niklas Hallqvist. All rights reserved. + * Copyright (c) 2003 Thomas Walpuski. 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. + */ + +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <stdlib.h> +#include <string.h> + +#include "sysdep.h" + +#include "util.h" + +#ifdef NEED_SYSDEP_APP +#include "app.h" +#include "conf.h" +#include "ipsec.h" +#include <linux/pfkeyv2.h> +#include <linux/ipsec.h> + +#ifdef USE_PF_KEY_V2 +#include "pf_key_v2.h" +#define KEY_API(x) pf_key_v2_##x +#endif + +#endif /* NEED_SYSDEP_APP */ +#include "log.h" + +extern char *__progname; + +/* + * An as strong as possible random number generator, reverting to a + * deterministic pseudo-random one if regrand is set. + */ +u_int32_t +sysdep_random () +{ + return arc4random(); +} + +/* Return the basename of the command used to invoke us. */ +char * +sysdep_progname () +{ + return __progname; +} + +/* Return the length of the sockaddr struct. */ +u_int8_t +sysdep_sa_len (struct sockaddr *sa) +{ + switch (sa->sa_family) + { + case AF_INET: + return sizeof (struct sockaddr_in); + case AF_INET6: + return sizeof (struct sockaddr_in6); + default: + log_print ("sysdep_sa_len: unknown sa family %d", sa->sa_family); + } + return sizeof (struct sockaddr_in); +} + +/* As regress/ use this file I protect the sysdep_app_* stuff like this. */ +#ifdef NEED_SYSDEP_APP +/* + * Prepare the application we negotiate SAs for (i.e. the IPsec stack) + * for communication. We return a file descriptor useable to select(2) on. + */ +int +sysdep_app_open () +{ + return KEY_API(open) (); +} + +/* + * When select(2) has noticed our application needs attendance, this is what + * gets called. FD is the file descriptor causing the alarm. + */ +void +sysdep_app_handler (int fd) +{ + KEY_API (handler) (fd); +} + +/* Check that the connection named NAME is active, or else make it active. */ +void +sysdep_connection_check (char *name) +{ + KEY_API (connection_check) (name); +} + +/* + * Generate a SPI for protocol PROTO and the source/destination pair given by + * SRC, SRCLEN, DST & DSTLEN. Stash the SPI size in SZ. + */ +u_int8_t * +sysdep_ipsec_get_spi (size_t *sz, u_int8_t proto, struct sockaddr *src, + struct sockaddr *dst, u_int32_t seq) +{ + if (app_none) + { + *sz = IPSEC_SPI_SIZE; + /* XXX should be random instead I think. */ + return strdup ("\x12\x34\x56\x78"); + } + return KEY_API (get_spi) (sz, proto, src, dst, seq); +} + +struct sa_kinfo * +sysdep_ipsec_get_kernel_sa(u_int8_t *spi, size_t spi_sz, u_int8_t proto, + struct sockaddr *dst) +{ + if (app_none) + return 0; + /* XXX return KEY_API(get_kernel_sa)(spi, spi_sz, proto, dst); */ + return 0; +} + +/* Force communication on socket FD to go in the clear. */ +int +sysdep_cleartext (int fd, int af) +{ + struct sadb_x_policy pol_in = { + SADB_UPDATE, + SADB_EXT_SENSITIVITY, + IPSEC_POLICY_BYPASS, + IPSEC_DIR_INBOUND, + 0, + 0, + 0 + }; + struct sadb_x_policy pol_out = { + SADB_UPDATE, + SADB_EXT_SENSITIVITY, + IPSEC_POLICY_BYPASS, + IPSEC_DIR_OUTBOUND, + 0, + 0, + 0 + }; + + if (app_none) + return 0; + + if (!(af == AF_INET || af == AF_INET6)) + { + log_print ("sysdep_cleartext: unsupported protocol family %d", af); + return -1; + } + + if (setsockopt (fd, af == AF_INET ? IPPROTO_IP : IPPROTO_IPV6, + af == AF_INET ? IP_IPSEC_POLICY : IPV6_IPSEC_POLICY, + &pol_in, sizeof pol_in) < 0 || + setsockopt (fd, af == AF_INET ? IPPROTO_IP : IPPROTO_IPV6, + af == AF_INET ? IP_IPSEC_POLICY : IPV6_IPSEC_POLICY, + &pol_out, sizeof pol_out) < 0) + { + log_error ("sysdep_cleartext: " + "setsockopt (%d, IPPROTO_IP%s, IP%s_IPSEC_POLICY, ...) " + "failed", fd, af == AF_INET ? "" : "V6", + af == AF_INET ? "" : "V6"); + return -1; + } + return 0; +} + +int +sysdep_ipsec_delete_spi (struct sa *sa, struct proto *proto, int incoming) +{ + if (app_none) + return 0; + return KEY_API (delete_spi) (sa, proto, incoming); +} + +int +sysdep_ipsec_enable_sa (struct sa *sa, struct sa *isakmp_sa) +{ + if (app_none) + return 0; + return KEY_API (enable_sa) (sa, isakmp_sa); +} + +int +sysdep_ipsec_group_spis (struct sa *sa, struct proto *proto1, + struct proto *proto2, int incoming) +{ + if (app_none) + return 0; + return KEY_API (group_spis) (sa, proto1, proto2, incoming); +} + +int +sysdep_ipsec_set_spi (struct sa *sa, struct proto *proto, int incoming, + struct sa *isakmp_sa) +{ + if (app_none) + return 0; + return KEY_API (set_spi) (sa, proto, incoming, isakmp_sa); +} +#endif |