--- /dev/null
+#include <stddef.h>
+#include <stdint.h>
+
+#include <datatype.h>
+#include <dccpopt.h>
+#include <expression.h>
+#include <nftables.h>
+#include <utils.h>
+
+#define PHT(__token, __offset, __len) \
+ PROTO_HDR_TEMPLATE(__token, &integer_type, BYTEORDER_BIG_ENDIAN, \
+ __offset, __len)
+
+static const struct proto_hdr_template dccpopt_unknown_template =
+ PROTO_HDR_TEMPLATE("unknown", &invalid_type, BYTEORDER_INVALID, 0, 0);
+
+/*
+ * Option DCCP- Section
+ * Type Length Meaning Data? Reference
+ * ---- ------ ------- ----- ---------
+ * 0 1 Padding Y 5.8.1
+ * 1 1 Mandatory N 5.8.2
+ * 2 1 Slow Receiver Y 11.6
+ * 3-31 1 Reserved
+ * 32 variable Change L N 6.1
+ * 33 variable Confirm L N 6.2
+ * 34 variable Change R N 6.1
+ * 35 variable Confirm R N 6.2
+ * 36 variable Init Cookie N 8.1.4
+ * 37 3-8 NDP Count Y 7.7
+ * 38 variable Ack Vector [Nonce 0] N 11.4
+ * 39 variable Ack Vector [Nonce 1] N 11.4
+ * 40 variable Data Dropped N 11.7
+ * 41 6 Timestamp Y 13.1
+ * 42 6/8/10 Timestamp Echo Y 13.3
+ * 43 4/6 Elapsed Time N 13.2
+ * 44 6 Data Checksum Y 9.3
+ * 45-127 variable Reserved
+ * 128-255 variable CCID-specific options - 10.3
+ */
+
+static const struct exthdr_desc dccpopt_padding = {
+ .name = "padding",
+ .type = DCCPOPT_PADDING,
+ .templates = {
+ [DCCPOPT_FIELD_TYPE] = PHT("type", 0, 8),
+ },
+};
+
+static const struct exthdr_desc dccpopt_mandatory = {
+ .name = "mandatory",
+ .type = DCCPOPT_MANDATORY,
+ .templates = {
+ [DCCPOPT_FIELD_TYPE] = PHT("type", 0, 8),
+ },
+};
+
+static const struct exthdr_desc dccpopt_slow_receiver = {
+ .name = "slow_receiver",
+ .type = DCCPOPT_SLOW_RECEIVER,
+ .templates = {
+ [DCCPOPT_FIELD_TYPE] = PHT("type", 0, 8),
+ },
+};
+
+static const struct exthdr_desc dccpopt_reserved_short = {
+ .name = "reserved_short",
+ .type = DCCPOPT_RESERVED_SHORT,
+ .templates = {
+ [DCCPOPT_FIELD_TYPE] = PHT("type", 0, 8),
+ },
+};
+
+static const struct exthdr_desc dccpopt_change_l = {
+ .name = "change_l",
+ .type = DCCPOPT_CHANGE_L,
+ .templates = {
+ [DCCPOPT_FIELD_TYPE] = PHT("type", 0, 8)
+ },
+};
+
+static const struct exthdr_desc dccpopt_confirm_l = {
+ .name = "confirm_l",
+ .type = DCCPOPT_CONFIRM_L,
+ .templates = {
+ [DCCPOPT_FIELD_TYPE] = PHT("type", 0, 8),
+ },
+};
+
+static const struct exthdr_desc dccpopt_change_r = {
+ .name = "change_r",
+ .type = DCCPOPT_CHANGE_R,
+ .templates = {
+ [DCCPOPT_FIELD_TYPE] = PHT("type", 0, 8),
+ },
+};
+
+static const struct exthdr_desc dccpopt_confirm_r = {
+ .name = "confirm_r",
+ .type = DCCPOPT_CONFIRM_R,
+ .templates = {
+ [DCCPOPT_FIELD_TYPE] = PHT("type", 0, 8),
+ },
+};
+
+static const struct exthdr_desc dccpopt_init_cookie = {
+ .name = "init_cookie",
+ .type = DCCPOPT_INIT_COOKIE,
+ .templates = {
+ [DCCPOPT_FIELD_TYPE] = PHT("type", 0, 8),
+ },
+};
+
+static const struct exthdr_desc dccpopt_ndp_count = {
+ .name = "ndp_count",
+ .type = DCCPOPT_NDP_COUNT,
+ .templates = {
+ [DCCPOPT_FIELD_TYPE] = PHT("type", 0, 8),
+ },
+};
+
+static const struct exthdr_desc dccpopt_ack_vector_nonce_0 = {
+ .name = "ack_vector_nonce_0",
+ .type = DCCPOPT_ACK_VECTOR_NONCE_0,
+ .templates = {
+ [DCCPOPT_FIELD_TYPE] = PHT("type", 0, 8),
+ },
+};
+
+static const struct exthdr_desc dccpopt_ack_vector_nonce_1 = {
+ .name = "ack_vector_nonce_1",
+ .type = DCCPOPT_ACK_VECTOR_NONCE_1,
+ .templates = {
+ [DCCPOPT_FIELD_TYPE] = PHT("type", 0, 8),
+ },
+};
+
+static const struct exthdr_desc dccpopt_data_dropped = {
+ .name = "data_dropped",
+ .type = DCCPOPT_DATA_DROPPED,
+ .templates = {
+ [DCCPOPT_FIELD_TYPE] = PHT("type", 0, 8),
+ },
+};
+
+static const struct exthdr_desc dccpopt_timestamp = {
+ .name = "timestamp",
+ .type = DCCPOPT_TIMESTAMP,
+ .templates = {
+ [DCCPOPT_FIELD_TYPE] = PHT("type", 0, 8),
+ },
+};
+
+static const struct exthdr_desc dccpopt_timestamp_echo = {
+ .name = "timestamp_echo",
+ .type = DCCPOPT_TIMESTAMP_ECHO,
+ .templates = {
+ [DCCPOPT_FIELD_TYPE] = PHT("type", 0, 8),
+ },
+};
+
+static const struct exthdr_desc dccpopt_elapsed_time = {
+ .name = "elapsed_time",
+ .type = DCCPOPT_ELAPSED_TIME,
+ .templates = {
+ [DCCPOPT_FIELD_TYPE] = PHT("type", 0, 8),
+ },
+};
+
+static const struct exthdr_desc dccpopt_data_checksum = {
+ .name = "data_checksum",
+ .type = DCCPOPT_DATA_CHECKSUM,
+ .templates = {
+ [DCCPOPT_FIELD_TYPE] = PHT("type", 0, 8),
+ },
+};
+
+static const struct exthdr_desc dccpopt_reserved_long = {
+ .name = "reserved_long",
+ .type = DCCPOPT_RESERVED_LONG,
+ .templates = {
+ [DCCPOPT_FIELD_TYPE] = PHT("type", 0, 8),
+ },
+};
+
+static const struct exthdr_desc dccpopt_ccid_specific = {
+ .name = "ccid_specific",
+ .type = DCCPOPT_CCID_SPECIFIC,
+ .templates = {
+ [DCCPOPT_FIELD_TYPE] = PHT("type", 0, 8),
+ },
+};
+
+const struct exthdr_desc *dccpopt_protocols[1 + UINT8_MAX] = {
+ [DCCPOPT_PADDING] = &dccpopt_padding,
+ [DCCPOPT_MANDATORY] = &dccpopt_mandatory,
+ [DCCPOPT_SLOW_RECEIVER] = &dccpopt_slow_receiver,
+ [DCCPOPT_RESERVED_SHORT] = &dccpopt_reserved_short,
+ [DCCPOPT_CHANGE_L] = &dccpopt_change_l,
+ [DCCPOPT_CONFIRM_L] = &dccpopt_confirm_l,
+ [DCCPOPT_CHANGE_R] = &dccpopt_change_r,
+ [DCCPOPT_CONFIRM_R] = &dccpopt_confirm_r,
+ [DCCPOPT_INIT_COOKIE] = &dccpopt_init_cookie,
+ [DCCPOPT_NDP_COUNT] = &dccpopt_ndp_count,
+ [DCCPOPT_ACK_VECTOR_NONCE_0] = &dccpopt_ack_vector_nonce_0,
+ [DCCPOPT_ACK_VECTOR_NONCE_1] = &dccpopt_ack_vector_nonce_1,
+ [DCCPOPT_DATA_DROPPED] = &dccpopt_data_dropped,
+ [DCCPOPT_TIMESTAMP] = &dccpopt_timestamp,
+ [DCCPOPT_TIMESTAMP_ECHO] = &dccpopt_timestamp_echo,
+ [DCCPOPT_ELAPSED_TIME] = &dccpopt_elapsed_time,
+ [DCCPOPT_DATA_CHECKSUM] = &dccpopt_data_checksum,
+ [DCCPOPT_RESERVED_LONG] = &dccpopt_reserved_long,
+ [DCCPOPT_CCID_SPECIFIC] = &dccpopt_ccid_specific,
+};
+
+const struct exthdr_desc *
+dccpopt_find_desc(uint8_t type)
+{
+ enum dccpopt_types proto_idx =
+ 3 <= type && type <= 31 ? DCCPOPT_RESERVED_SHORT :
+ 45 <= type && type <= 127 ? DCCPOPT_RESERVED_LONG :
+ 128 <= type ? DCCPOPT_CCID_SPECIFIC : type;
+
+ return dccpopt_protocols[proto_idx];
+}
+
+struct expr *
+dccpopt_expr_alloc(const struct location *loc, uint8_t type)
+{
+ const struct proto_hdr_template *tmpl;
+ const struct exthdr_desc *desc;
+ struct expr *expr;
+
+ desc = dccpopt_find_desc(type);
+ tmpl = &desc->templates[DCCPOPT_FIELD_TYPE];
+
+ expr = expr_alloc(loc, EXPR_EXTHDR, tmpl->dtype,
+ BYTEORDER_BIG_ENDIAN, BITS_PER_BYTE);
+ expr->exthdr.desc = desc;
+ expr->exthdr.tmpl = tmpl;
+ expr->exthdr.offset = tmpl->offset;
+ expr->exthdr.raw_type = type;
+ expr->exthdr.flags = NFT_EXTHDR_F_PRESENT;
+ expr->exthdr.op = NFT_EXTHDR_OP_DCCP;
+
+ return expr;
+}
+
+void
+dccpopt_init_raw(struct expr *expr, uint8_t type, unsigned int offset,
+ unsigned int len)
+{
+ const struct proto_hdr_template *tmpl;
+ const struct exthdr_desc *desc;
+
+ assert(expr->etype == EXPR_EXTHDR);
+
+ desc = dccpopt_find_desc(type);
+ tmpl = &desc->templates[DCCPOPT_FIELD_TYPE];
+
+ expr->len = len;
+ datatype_set(expr, &boolean_type);
+
+ expr->exthdr.offset = offset;
+ expr->exthdr.desc = desc;
+ expr->exthdr.flags = NFT_EXTHDR_F_PRESENT;
+ expr->exthdr.op = NFT_EXTHDR_OP_DCCP;
+
+ /* Make sure that it's the right template based on offset and
+ * len
+ */
+ if (tmpl->offset != offset || tmpl->len != len)
+ expr->exthdr.tmpl = &dccpopt_unknown_template;
+ else
+ expr->exthdr.tmpl = tmpl;
+}
projects / thirdparty / nftables.git / commitdiff
