static inline unsigned char __has_network_hdr(struct sk_buff *skb)
{
/*
- * If the header is not set yet,
- * the network header will point to the head.
+ * If the header is not set yet, the network header will point
+ * to the head.
*/
return skb_network_header(skb) != skb->head;
}
static struct lttng_event_field emptyfields[] = {
};
+/* Structures for transport headers. */
+
+static struct lttng_event_field tcpfields[] = {
+ [0] = {
+ .name = "source_port",
+ .type = __type_integer(uint16_t, 0, 0, 0,
+ __BIG_ENDIAN, 10, none),
+ },
+ [1] = {
+ .name = "dest_port",
+ .type = __type_integer(uint16_t, 0, 0, 0,
+ __BIG_ENDIAN, 10, none),
+ },
+ [2] = {
+ .name = "seq",
+ .type = __type_integer(uint32_t, 0, 0, 0,
+ __BIG_ENDIAN, 10, none),
+ },
+ [3] = {
+ .name = "ack_seq",
+ .type = __type_integer(uint32_t, 0, 0, 0,
+ __BIG_ENDIAN, 10, none),
+ },
+ [4] = {
+ .name = "data_offset",
+ .type = __type_integer(uint8_t, 4, 4, 0,
+ __BIG_ENDIAN, 10, none),
+ },
+ [5] = {
+ .name = "reserved",
+ .type = __type_integer(uint8_t, 3, 1, 0,
+ __BIG_ENDIAN, 10, none),
+ },
+ [6] = {
+ .name = "flags",
+ .type = __type_integer(uint8_t, 9, 1, 0,
+ __BIG_ENDIAN, 16, none),
+ },
+ [7] = {
+ .name = "window_size",
+ .type = __type_integer(uint16_t, 0, 0, 0,
+ __BIG_ENDIAN, 10, none),
+ },
+ [8] = {
+ .name = "checksum",
+ .type = __type_integer(uint16_t, 0, 0, 0,
+ __BIG_ENDIAN, 16, none),
+ },
+ [9] = {
+ .name = "urg_ptr",
+ .type = __type_integer(uint16_t, 0, 0, 0,
+ __BIG_ENDIAN, 10, none),
+ },
+};
+
+static struct lttng_event_field transport_fields[] = {
+ [0] = {
+ .name = "unknown",
+ .type = {
+ .atype = atype_struct,
+ .u._struct.nr_fields = ARRAY_SIZE(emptyfields),
+ .u._struct.fields = emptyfields,
+ },
+ },
+ [1] = {
+ .name = "tcp",
+ .type = {
+ .atype = atype_struct,
+ .u._struct.nr_fields = ARRAY_SIZE(tcpfields),
+ .u._struct.fields = tcpfields,
+ },
+ },
+};
+
+enum transport_header_types {
+ TH_NONE = 0,
+ TH_TCP = 1,
+};
+
+static inline enum transport_header_types __get_transport_header_type(struct sk_buff *skb)
+{
+ if (__has_network_hdr(skb)) {
+ /*
+ * When both transport and network headers are set,
+ * transport header is greater than network header,
+ * otherwise it points to head.
+ */
+ if (skb->transport_header > skb->network_header) {
+ /*
+ * Get the transport protocol from the network
+ * header's data. This method works both for
+ * sent and received packets.
+ */
+ if ((skb->protocol == htons(ETH_P_IP) &&
+ ip_hdr(skb)->protocol == IPPROTO_TCP) ||
+ (skb->protocol == htons(ETH_P_IPV6) &&
+ ipv6_hdr(skb)->nexthdr == IPPROTO_TCP))
+ return TH_TCP;
+ }
+ /* Fallthrough for other cases where header is not TCP. */
+ }
+ return TH_NONE;
+}
+
+static struct lttng_enum_entry transport_enum_entries[] = {
+ [0] = {
+ .start = { .value = TH_NONE, .signedness = 0, },
+ .end = { .value = TH_NONE, .signedness = 0, },
+ .string = "_unknown",
+ },
+ [1] = {
+ .start = { .value = TH_TCP, .signedness = 0, },
+ .end = { .value = TH_TCP, .signedness = 0, },
+ .string = "_tcp",
+ },
+};
+
+static const struct lttng_enum_desc transport_header_type = {
+ .name = "transport_header_type",
+ .entries = transport_enum_entries,
+ .nr_entries = ARRAY_SIZE(transport_enum_entries),
+};
+
/* Structures for network headers. */
static struct lttng_event_field ipv4fields[] = {
[0] = {
.name = "version",
- .type = __type_integer(uint8_t, 4, 4, 0, __BIG_ENDIAN, 10, none),
+ .type = __type_integer(uint8_t, 4, 4, 0,
+ __BIG_ENDIAN, 10, none),
},
[1] = {
.name = "ihl",
- .type = __type_integer(uint8_t, 4, 4, 0, __BIG_ENDIAN, 10, none),
+ .type = __type_integer(uint8_t, 4, 4, 0,
+ __BIG_ENDIAN, 10, none),
},
[2] = {
.name = "tos",
- .type = __type_integer(uint8_t, 0, 0, 0, __BIG_ENDIAN, 10, none),
+ .type = __type_integer(uint8_t, 0, 0, 0,
+ __BIG_ENDIAN, 10, none),
},
[3] = {
.name = "tot_len",
- .type = __type_integer(uint16_t, 0, 0, 0, __BIG_ENDIAN, 10, none),
+ .type = __type_integer(uint16_t, 0, 0, 0,
+ __BIG_ENDIAN, 10, none),
},
[4] = {
.name = "id",
- .type = __type_integer(uint16_t, 0, 0, 0, __BIG_ENDIAN, 16, none),
+ .type = __type_integer(uint16_t, 0, 0, 0,
+ __BIG_ENDIAN, 16, none),
},
[5] = {
.name = "frag_off",
- .type = __type_integer(uint16_t, 0, 0, 0, __BIG_ENDIAN, 10, none),
+ .type = __type_integer(uint16_t, 0, 0, 0,
+ __BIG_ENDIAN, 10, none),
},
[6] = {
.name = "ttl",
- .type = __type_integer(uint8_t, 0, 0, 0, __BIG_ENDIAN, 10, none),
+ .type = __type_integer(uint8_t, 0, 0, 0,
+ __BIG_ENDIAN, 10, none),
},
[7] = {
.name = "protocol",
- .type = __type_integer(uint8_t, 0, 0, 0, __BIG_ENDIAN, 10, none),
+ .type = {
+ .atype = atype_enum,
+ .u.basic.enumeration.desc = &transport_header_type,
+ .u.basic.enumeration.container_type = {
+ .size = 8,
+ .alignment = 8,
+ .signedness = 0,
+ .reverse_byte_order =
+ __BIG_ENDIAN != __BYTE_ORDER,
+ .base = 10,
+ .encoding = lttng_encode_none,
+ },
+ },
},
[8] = {
.name = "checksum",
- .type = __type_integer(uint16_t, 0, 0, 0, __BIG_ENDIAN, 16, none),
+ .type = __type_integer(uint16_t, 0, 0, 0,
+ __BIG_ENDIAN, 16, none),
},
[9] = {
.name = "saddr",
.type = {
.atype = atype_array,
- .u.array.elem_type = __type_integer(uint8_t, 0, 0, 0, __BIG_ENDIAN, 10, none),
+ .u.array.elem_type =
+ __type_integer(uint8_t, 0, 0, 0,
+ __BIG_ENDIAN, 10, none),
.u.array.length = 4,
.u.array.elem_alignment = lttng_alignof(uint8_t),
},
.name = "daddr",
.type = {
.atype = atype_array,
- .u.array.elem_type = __type_integer(uint8_t, 0, 0, 0, __BIG_ENDIAN, 10, none),
+ .u.array.elem_type =
+ __type_integer(uint8_t, 0, 0, 0,
+ __BIG_ENDIAN, 10, none),
.u.array.length = 4,
.u.array.elem_alignment = lttng_alignof(uint8_t),
},
},
+ [11] = {
+ .name = "transport_header_type",
+ .type = {
+ .atype = atype_enum,
+ .u.basic.enumeration.desc = &transport_header_type,
+ .u.basic.enumeration.container_type = {
+ .size = 8,
+ .alignment = 8,
+ .signedness = 0,
+ .reverse_byte_order = 0,
+ .base = 10,
+ .encoding = lttng_encode_none,
+ },
+ },
+ },
+ [12] = {
+ .name = "transport_header",
+ .type = {
+ .atype = atype_variant,
+ .u.variant.tag_name = "transport_header_type",
+ .u.variant.choices = transport_fields,
+ .u.variant.nr_choices = ARRAY_SIZE(transport_fields),
+ },
+ },
};
static struct lttng_event_field ipv6fields[] = {
[0] = {
.name = "version",
- .type = __type_integer(uint8_t, 4, 4, 0, __BIG_ENDIAN, 10, none),
+ .type = __type_integer(uint8_t, 4, 4, 0,
+ __BIG_ENDIAN, 10, none),
},
[1] = {
.name = "prio",
- .type = __type_integer(uint8_t, 4, 4, 0, __BIG_ENDIAN, 10, none),
+ .type = __type_integer(uint8_t, 4, 4, 0,
+ __BIG_ENDIAN, 10, none),
},
[2] = {
.name = "flow_lbl",
.type = {
.atype = atype_array,
- .u.array.elem_type = __type_integer(uint8_t, 0, 0, 0, __BIG_ENDIAN, 16, none),
+ .u.array.elem_type =
+ __type_integer(uint8_t, 0, 0, 0,
+ __BIG_ENDIAN, 16, none),
.u.array.length = 3,
.u.array.elem_alignment = lttng_alignof(uint8_t),
},
},
[3] = {
.name = "payload_len",
- .type = __type_integer(uint16_t, 0, 0, 0, __BIG_ENDIAN, 10, none),
+ .type = __type_integer(uint16_t, 0, 0, 0,
+ __BIG_ENDIAN, 10, none),
},
[4] = {
.name = "nexthdr",
- .type = __type_integer(uint8_t, 0, 0, 0, __BIG_ENDIAN, 10, none),
+ .type = {
+ .atype = atype_enum,
+ .u.basic.enumeration.desc = &transport_header_type,
+ .u.basic.enumeration.container_type = {
+ .size = 8,
+ .alignment = 8,
+ .signedness = 0,
+ .reverse_byte_order =
+ __BIG_ENDIAN != __BYTE_ORDER,
+ .base = 10,
+ .encoding = lttng_encode_none,
+ },
+ },
},
[5] = {
.name = "hop_limit",
- .type = __type_integer(uint8_t, 0, 0, 0, __BIG_ENDIAN, 10, none),
+ .type = __type_integer(uint8_t, 0, 0, 0,
+ __BIG_ENDIAN, 10, none),
},
[6] = {
.name = "saddr",
.type = {
.atype = atype_array,
- .u.array.elem_type = __type_integer(uint16_t, 0, 0, 0, __BIG_ENDIAN, 16, none),
+ .u.array.elem_type =
+ __type_integer(uint16_t, 0, 0, 0,
+ __BIG_ENDIAN, 16, none),
.u.array.length = 8,
.u.array.elem_alignment = lttng_alignof(uint16_t),
},
.name = "daddr",
.type = {
.atype = atype_array,
- .u.array.elem_type = __type_integer(uint16_t, 0, 0, 0, __BIG_ENDIAN, 16, none),
+ .u.array.elem_type =
+ __type_integer(uint16_t, 0, 0, 0,
+ __BIG_ENDIAN, 16, none),
.u.array.length = 8,
.u.array.elem_alignment = lttng_alignof(uint16_t),
},
},
+ [8] = {
+ .name = "transport_header_type",
+ .type = {
+ .atype = atype_enum,
+ .u.basic.enumeration.desc = &transport_header_type,
+ .u.basic.enumeration.container_type = {
+ .size = 8,
+ .alignment = 8,
+ .signedness = 0,
+ .reverse_byte_order = 0,
+ .base = 10,
+ .encoding = lttng_encode_none,
+ },
+ },
+ },
+ [9] = {
+ .name = "transport_header",
+ .type = {
+ .atype = atype_variant,
+ .u.variant.tag_name = "transport_header_type",
+ .u.variant.choices = transport_fields,
+ .u.variant.nr_choices = ARRAY_SIZE(transport_fields),
+ },
+ },
};
static struct lttng_event_field network_fields[] = {
#else
TP_PROTO(struct sk_buff *skb,
int rc),
-
+
TP_ARGS(skb, rc),
#endif
.atype = atype_variant,
.u.variant.tag_name = "network_header_type",
.u.variant.choices = network_fields,
- .u.variant.nr_choices = ARRAY_SIZE(network_fields),
+ .u.variant.nr_choices =
+ ARRAY_SIZE(network_fields),
),
network_header,
ctf_custom_code(
+ bool has_network_header = false;
+
+ /* Copy the network header. */
switch (__get_network_header_type(skb)) {
case NH_IPV4: {
ctf_align(uint16_t)
ctf_array_type(uint8_t, ip_hdr(skb),
sizeof(struct iphdr))
+ has_network_header = true;
break;
}
case NH_IPV6: {
ctf_align(uint16_t)
ctf_array_type(uint8_t, ipv6_hdr(skb),
sizeof(struct ipv6hdr))
+ has_network_header = true;
break;
}
default:
- /* For any other header type, there is nothing to do. */
+ /*
+ * For any other network header
+ * type, there is nothing to do.
+ */
break;
}
+
+ if (has_network_header) {
+ enum transport_header_types th_type =
+ __get_transport_header_type(skb);
+
+ /* Transport header type field. */
+ ctf_integer_type(unsigned char, th_type)
+
+ /* Copy the transport header. */
+ if (th_type == TH_TCP) {
+ ctf_align(uint32_t)
+ ctf_array_type(uint8_t, tcp_hdr(skb),
+ sizeof(struct tcphdr))
+ }
+ /*
+ * For any other transport header type,
+ * there is nothing to do.
+ */
+ }
)
)
)
projects / lttng-modules.git / blobdiff