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authorOthmar Gsenger <otti@anytun.org>2007-07-30 19:37:53 +0000
committerOthmar Gsenger <otti@anytun.org>2007-07-30 19:37:53 +0000
commit6585e5ad764ee2414d9b01f30784b6549bc8f58e (patch)
tree4ea258d5327838363dc3ac66d09ecc94686f3e26 /keyexchange/isakmpd-20041012/field.c
parentripe requests, final (diff)
added keyexchange
Diffstat (limited to 'keyexchange/isakmpd-20041012/field.c')
-rw-r--r--keyexchange/isakmpd-20041012/field.c252
1 files changed, 252 insertions, 0 deletions
diff --git a/keyexchange/isakmpd-20041012/field.c b/keyexchange/isakmpd-20041012/field.c
new file mode 100644
index 0000000..0cc96d2
--- /dev/null
+++ b/keyexchange/isakmpd-20041012/field.c
@@ -0,0 +1,252 @@
+/* $OpenBSD: field.c,v 1.16 2004/06/14 09:55:41 ho Exp $ */
+/* $EOM: field.c,v 1.11 2000/02/20 19:58:37 niklas Exp $ */
+
+/*
+ * Copyright (c) 1998, 1999 Niklas Hallqvist. 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "sysdep.h"
+
+#include "constants.h"
+#include "field.h"
+#include "log.h"
+#include "util.h"
+
+static char *field_debug_raw(u_int8_t *, size_t, struct constant_map **);
+static char *field_debug_num(u_int8_t *, size_t, struct constant_map **);
+static char *field_debug_mask(u_int8_t *, size_t, struct constant_map **);
+static char *field_debug_ign(u_int8_t *, size_t, struct constant_map **);
+static char *field_debug_cst(u_int8_t *, size_t, struct constant_map **);
+
+/* Contents must match the enum in struct field. */
+static char *(*decode_field[]) (u_int8_t *, size_t,
+ struct constant_map **) = {
+ field_debug_raw,
+ field_debug_num,
+ field_debug_mask,
+ field_debug_ign,
+ field_debug_cst
+};
+
+/*
+ * Return a string showing the hexadecimal contents of the LEN-sized buffer
+ * BUF. MAPS should be zero and is only here because the API requires it.
+ */
+static char *
+field_debug_raw(u_int8_t *buf, size_t len, struct constant_map **maps)
+{
+ char *retval, *p;
+
+ if (len == 0)
+ return 0;
+ retval = malloc(3 + len * 2);
+ if (!retval)
+ return 0;
+ strlcpy(retval, "0x", 3 + len * 2);
+ p = retval + 2;
+ for (; len > 0; len--) {
+ snprintf(p, 1 + len * 2, "%02x", *buf++);
+ p += 2;
+ }
+ return retval;
+}
+
+/*
+ * Convert the unsigned LEN-sized number at BUF of network byteorder to a
+ * 32-bit unsigned integer of host byteorder pointed to by VAL.
+ */
+static int
+extract_val(u_int8_t *buf, size_t len, u_int32_t *val)
+{
+ switch (len) {
+ case 1:
+ *val = *buf;
+ break;
+ case 2:
+ *val = decode_16(buf);
+ break;
+ case 4:
+ *val = decode_32(buf);
+ break;
+ default:
+ return -1;
+ }
+ return 0;
+}
+
+/*
+ * Return a textual representation of the unsigned number pointed to by BUF
+ * which is LEN octets long. MAPS should be zero and is only here because
+ * the API requires it.
+ */
+static char *
+field_debug_num(u_int8_t *buf, size_t len, struct constant_map **maps)
+{
+ char *retval;
+ u_int32_t val;
+
+ if (extract_val(buf, len, &val))
+ return 0;
+ /* 3 decimal digits are enough to represent each byte. */
+ retval = malloc(3 * len);
+ snprintf(retval, 3 * len, "%u", val);
+ return retval;
+}
+
+/*
+ * Return the symbolic names of the flags pointed to by BUF which is LEN
+ * octets long, using the constant maps MAPS.
+ */
+static char *
+field_debug_mask(u_int8_t *buf, size_t len, struct constant_map **maps)
+{
+ u_int32_t val;
+ u_int32_t bit;
+ char *retval, *new_buf, *name;
+ size_t buf_sz;
+
+ if (extract_val(buf, len, &val))
+ return 0;
+
+ /* Size for brackets, two spaces and a NUL terminator. */
+ buf_sz = 4;
+ retval = malloc(buf_sz);
+ if (!retval)
+ return 0;
+
+ strlcpy(retval, "[ ", buf_sz);
+ for (bit = 1; bit; bit <<= 1) {
+ if (val & bit) {
+ name = constant_name_maps(maps, bit);
+ buf_sz += strlen(name) + 1;
+ new_buf = realloc(retval, buf_sz);
+ if (!new_buf) {
+ free(retval);
+ return 0;
+ }
+ retval = new_buf;
+ strlcat(retval, name, buf_sz);
+ strlcat(retval, " ", buf_sz);
+ }
+ }
+ strlcat(retval, "]", buf_sz);
+ return retval;
+}
+
+/*
+ * Just a dummy needed to skip the unused LEN sized space at BUF. MAPS
+ * should be zero and is only here because the API requires it.
+ */
+static char *
+field_debug_ign(u_int8_t *buf, size_t len, struct constant_map **maps)
+{
+ return 0;
+}
+
+/*
+ * Return the symbolic name of a constant pointed to by BUF which is LEN
+ * octets long, using the constant maps MAPS.
+ */
+static char *
+field_debug_cst(u_int8_t *buf, size_t len, struct constant_map **maps)
+{
+ u_int32_t val;
+
+ if (extract_val(buf, len, &val))
+ return 0;
+
+ return strdup(constant_name_maps(maps, val));
+}
+
+/* Pretty-print a field from BUF as described by F. */
+void
+field_dump_field(struct field *f, u_int8_t *buf)
+{
+ char *value;
+
+ value = decode_field[(int) f->type] (buf + f->offset, f->len, f->maps);
+ if (value) {
+ LOG_DBG((LOG_MESSAGE, 70, "%s: %s", f->name, value));
+ free(value);
+ }
+}
+
+/* Pretty-print all the fields of BUF as described in FIELDS. */
+void
+field_dump_payload(struct field *fields, u_int8_t *buf)
+{
+ struct field *field;
+
+ for (field = fields; field->name; field++)
+ field_dump_field(field, buf);
+}
+
+/* Return the numeric value of the field F of BUF. */
+u_int32_t
+field_get_num(struct field *f, u_int8_t *buf)
+{
+ u_int32_t val;
+
+ if (extract_val(buf + f->offset, f->len, &val))
+ return 0;
+ return val;
+}
+
+/* Stash the number VAL into BUF's field F. */
+void
+field_set_num(struct field *f, u_int8_t *buf, u_int32_t val)
+{
+ switch (f->len) {
+ case 1:
+ buf[f->offset] = val;
+ break;
+ case 2:
+ encode_16(buf + f->offset, val);
+ break;
+ case 4:
+ encode_32(buf + f->offset, val);
+ break;
+ }
+}
+
+/* Stash BUF's raw field F into VAL. */
+void
+field_get_raw(struct field *f, u_int8_t *buf, u_int8_t *val)
+{
+ memcpy(val, buf + f->offset, f->len);
+}
+
+/* Stash the buffer VAL into BUF's field F. */
+void
+field_set_raw(struct field *f, u_int8_t *buf, u_int8_t *val)
+{
+ memcpy(buf + f->offset, val, f->len);
+}