diff options
Diffstat (limited to 'lib/libipsec/ipsec_dump_policy.c')
-rw-r--r-- | lib/libipsec/ipsec_dump_policy.c | 307 |
1 files changed, 307 insertions, 0 deletions
diff --git a/lib/libipsec/ipsec_dump_policy.c b/lib/libipsec/ipsec_dump_policy.c new file mode 100644 index 0000000..5ddad43 --- /dev/null +++ b/lib/libipsec/ipsec_dump_policy.c @@ -0,0 +1,307 @@ +/* $KAME: ipsec_dump_policy.c,v 1.13 2002/06/27 14:35:11 itojun Exp $ */ + +/* + * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project. + * 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. + * 3. Neither the name of the project nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``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 PROJECT OR CONTRIBUTORS 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/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/param.h> +#include <sys/socket.h> + +#include <netipsec/key_var.h> +#include <netinet/in.h> +#include <netipsec/ipsec.h> + +#include <arpa/inet.h> + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <netdb.h> + +#include "ipsec_strerror.h" + +static const char *ipsp_dir_strs[] = { + "any", "in", "out", +}; + +static const char *ipsp_policy_strs[] = { + "discard", "none", "ipsec", "entrust", "bypass", +}; + +static char *ipsec_dump_ipsecrequest(char *, size_t, + struct sadb_x_ipsecrequest *, size_t); +static int set_addresses(char *, size_t, struct sockaddr *, struct sockaddr *); +static char *set_address(char *, size_t, struct sockaddr *); + +/* + * policy is sadb_x_policy buffer. + * Must call free() later. + * When delimiter == NULL, alternatively ' '(space) is applied. + */ +char * +ipsec_dump_policy(policy, delimiter) + caddr_t policy; + char *delimiter; +{ + struct sadb_x_policy *xpl = (struct sadb_x_policy *)policy; + struct sadb_x_ipsecrequest *xisr; + size_t off, buflen; + char *buf; + char isrbuf[1024]; + char *newbuf; + + /* sanity check */ + if (policy == NULL) + return NULL; + if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { + __ipsec_errcode = EIPSEC_INVAL_EXTTYPE; + return NULL; + } + + /* set delimiter */ + if (delimiter == NULL) + delimiter = " "; + + switch (xpl->sadb_x_policy_dir) { + case IPSEC_DIR_ANY: + case IPSEC_DIR_INBOUND: + case IPSEC_DIR_OUTBOUND: + break; + default: + __ipsec_errcode = EIPSEC_INVAL_DIR; + return NULL; + } + + switch (xpl->sadb_x_policy_type) { + case IPSEC_POLICY_DISCARD: + case IPSEC_POLICY_NONE: + case IPSEC_POLICY_IPSEC: + case IPSEC_POLICY_BYPASS: + case IPSEC_POLICY_ENTRUST: + break; + default: + __ipsec_errcode = EIPSEC_INVAL_POLICY; + return NULL; + } + + buflen = strlen(ipsp_dir_strs[xpl->sadb_x_policy_dir]) + + 1 /* space */ + + strlen(ipsp_policy_strs[xpl->sadb_x_policy_type]) + + 1; /* NUL */ + + if ((buf = malloc(buflen)) == NULL) { + __ipsec_errcode = EIPSEC_NO_BUFS; + return NULL; + } + snprintf(buf, buflen, "%s %s", ipsp_dir_strs[xpl->sadb_x_policy_dir], + ipsp_policy_strs[xpl->sadb_x_policy_type]); + + if (xpl->sadb_x_policy_type != IPSEC_POLICY_IPSEC) { + __ipsec_errcode = EIPSEC_NO_ERROR; + return buf; + } + + /* count length of buffer for use */ + off = sizeof(*xpl); + while (off < PFKEY_EXTLEN(xpl)) { + xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xpl + off); + off += xisr->sadb_x_ipsecrequest_len; + } + + /* validity check */ + if (off != PFKEY_EXTLEN(xpl)) { + __ipsec_errcode = EIPSEC_INVAL_SADBMSG; + free(buf); + return NULL; + } + + off = sizeof(*xpl); + while (off < PFKEY_EXTLEN(xpl)) { + xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xpl + off); + + if (ipsec_dump_ipsecrequest(isrbuf, sizeof(isrbuf), xisr, + PFKEY_EXTLEN(xpl) - off) == NULL) { + free(buf); + return NULL; + } + + buflen = strlen(buf) + strlen(delimiter) + strlen(isrbuf) + 1; + newbuf = (char *)realloc(buf, buflen); + if (newbuf == NULL) { + __ipsec_errcode = EIPSEC_NO_BUFS; + free(buf); + return NULL; + } + buf = newbuf; + snprintf(buf + strlen(buf), buflen - strlen(buf), + "%s%s", delimiter, isrbuf); + + off += xisr->sadb_x_ipsecrequest_len; + } + + __ipsec_errcode = EIPSEC_NO_ERROR; + return buf; +} + +static char * +ipsec_dump_ipsecrequest(buf, len, xisr, bound) + char *buf; + size_t len; + struct sadb_x_ipsecrequest *xisr; + size_t bound; /* boundary */ +{ + const char *proto, *mode, *level; + char abuf[NI_MAXHOST * 2 + 2]; + + if (xisr->sadb_x_ipsecrequest_len > bound) { + __ipsec_errcode = EIPSEC_INVAL_PROTO; + return NULL; + } + + switch (xisr->sadb_x_ipsecrequest_proto) { + case IPPROTO_ESP: + proto = "esp"; + break; + case IPPROTO_AH: + proto = "ah"; + break; + case IPPROTO_IPCOMP: + proto = "ipcomp"; + break; + case IPPROTO_TCP: + proto = "tcp"; + default: + __ipsec_errcode = EIPSEC_INVAL_PROTO; + return NULL; + } + + switch (xisr->sadb_x_ipsecrequest_mode) { + case IPSEC_MODE_ANY: + mode = "any"; + break; + case IPSEC_MODE_TRANSPORT: + mode = "transport"; + break; + case IPSEC_MODE_TUNNEL: + mode = "tunnel"; + break; + default: + __ipsec_errcode = EIPSEC_INVAL_MODE; + return NULL; + } + + abuf[0] = '\0'; + if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { + struct sockaddr *sa1, *sa2; + caddr_t p; + + p = (caddr_t)(xisr + 1); + sa1 = (struct sockaddr *)p; + sa2 = (struct sockaddr *)(p + sa1->sa_len); + if (sizeof(*xisr) + sa1->sa_len + sa2->sa_len != + xisr->sadb_x_ipsecrequest_len) { + __ipsec_errcode = EIPSEC_INVAL_ADDRESS; + return NULL; + } + if (set_addresses(abuf, sizeof(abuf), sa1, sa2) != 0) { + __ipsec_errcode = EIPSEC_INVAL_ADDRESS; + return NULL; + } + } + + switch (xisr->sadb_x_ipsecrequest_level) { + case IPSEC_LEVEL_DEFAULT: + level = "default"; + break; + case IPSEC_LEVEL_USE: + level = "use"; + break; + case IPSEC_LEVEL_REQUIRE: + level = "require"; + break; + case IPSEC_LEVEL_UNIQUE: + level = "unique"; + break; + default: + __ipsec_errcode = EIPSEC_INVAL_LEVEL; + return NULL; + } + + if (xisr->sadb_x_ipsecrequest_reqid == 0) + snprintf(buf, len, "%s/%s/%s/%s", proto, mode, abuf, level); + else { + int ch; + + if (xisr->sadb_x_ipsecrequest_reqid > IPSEC_MANUAL_REQID_MAX) + ch = '#'; + else + ch = ':'; + snprintf(buf, len, "%s/%s/%s/%s%c%u", proto, mode, abuf, level, + ch, xisr->sadb_x_ipsecrequest_reqid); + } + + return buf; +} + +static int +set_addresses(buf, len, sa1, sa2) + char *buf; + size_t len; + struct sockaddr *sa1; + struct sockaddr *sa2; +{ + char tmp1[NI_MAXHOST], tmp2[NI_MAXHOST]; + + if (set_address(tmp1, sizeof(tmp1), sa1) == NULL || + set_address(tmp2, sizeof(tmp2), sa2) == NULL) + return -1; + if (strlen(tmp1) + 1 + strlen(tmp2) + 1 > len) + return -1; + snprintf(buf, len, "%s-%s", tmp1, tmp2); + return 0; +} + +static char * +set_address(buf, len, sa) + char *buf; + size_t len; + struct sockaddr *sa; +{ + const int niflags = NI_NUMERICHOST; + + if (len < 1) + return NULL; + buf[0] = '\0'; + if (getnameinfo(sa, sa->sa_len, buf, len, NULL, 0, niflags) != 0) + return NULL; + return buf; +} |