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|
// clang-format off
#include <stddef.h>
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdint.h>
#include <setjmp.h>
#include <cmocka.h>
#include <libnet.h>
// clang-format on
/* Helpers */
#define LIBNET_TEST_ARRAY_LENGTH(array) (sizeof(array) / sizeof((array)[0]))
static uint8_t tlv_length_offset = 2;
static uint8_t tlv_value_offset = 4;
static void
libnet_build_udld__pdu_header_only(void **state)
{
(void)state; /* unused */
int rv = (-1);
char errbuf[LIBNET_ERRBUF_SIZE];
libnet_t *l = libnet_init(LIBNET_NONE, NULL, errbuf);
assert_non_null(l);
const uint8_t flags = (LIBNET_UDLD_FLAG_RT | LIBNET_UDLD_FLAG_RSY);
libnet_ptag_t udld_ptag = libnet_build_udld_hdr(LIBNET_UDLD_PDU_VERSION, /* version */
LIBNET_UDLD_PDU_OPCODE_PROBE, /* opcode */
flags, /* flags */
0, /* do checksum */
NULL, /* payload */
0, /* payload length */
l, /* libnet context */
0); /* protocol tag */
assert_int_not_equal(udld_ptag, (-1));
uint8_t *header = NULL;
uint32_t header_size = 0;
rv = libnet_adv_cull_header(l, udld_ptag, &header, &header_size);
assert_int_not_equal(rv, (-1));
struct libnet_udld_hdr *udld_hdr = NULL;
udld_hdr = (struct libnet_udld_hdr *)header;
assert_int_equal((udld_hdr->version_opcode >> LIBNET_UDLD_PDU_VERSION_OFFSET), LIBNET_UDLD_PDU_VERSION);
assert_int_equal((udld_hdr->version_opcode & LIBNET_UDLD_PDU_OPCODE_MASK), LIBNET_UDLD_PDU_OPCODE_PROBE);
assert_int_equal(udld_hdr->flags, (LIBNET_UDLD_FLAG_RT | LIBNET_UDLD_FLAG_RSY));
libnet_destroy(l);
}
/* Refs: tests/data/packet_captures/UDLD.cap, Packet #1, UDLD Device ID */
static void
libnet_build_udld__tlv_device_id(void **state)
{
(void)state; /* unused */
char errbuf[LIBNET_ERRBUF_SIZE];
libnet_t *l = libnet_init(LIBNET_NONE, NULL, errbuf);
assert_non_null(l);
const char *device_id_str = "FOC1031Z7JG";
libnet_ptag_t udld_tlv_device_id_ptag = libnet_build_udld_device_id((const uint8_t *)device_id_str,
strlen(device_id_str),
l,
0);
assert_int_not_equal(udld_tlv_device_id_ptag, (-1));
libnet_pblock_t *p = libnet_pblock_find(l, udld_tlv_device_id_ptag);
assert_non_null(p);
assert_int_equal(p->type, LIBNET_PBLOCK_UDLD_DEVICE_ID_H);
const uint16_t *type = (const uint16_t *)(p->buf);
const uint16_t *length = (const uint16_t *)(p->buf + tlv_length_offset);
const uint8_t *value = (const uint8_t *)(p->buf + tlv_value_offset);
assert_int_equal(p->type, LIBNET_PBLOCK_UDLD_DEVICE_ID_H);
assert_int_equal(ntohs(*type), LIBNET_UDLD_DEVICE_ID);
assert_int_equal(ntohs(*length), LIBNET_UDLD_TLV_HDR_SIZE + strlen(device_id_str));
assert_memory_equal(value, (const char []){ "FOC1031Z7JG" }, strlen(device_id_str));
libnet_destroy(l);
}
/* Refs: tests/data/packet_captures/UDLD.cap, Packet #1, UDLD Port ID */
static void
libnet_build_udld__tlv_port_id(void **state)
{
(void)state; /* unused */
char errbuf[LIBNET_ERRBUF_SIZE];
libnet_t *l = libnet_init(LIBNET_NONE, NULL, errbuf);
assert_non_null(l);
const char *origin_port_id_str = "Gi0/1";
libnet_ptag_t udld_tlv_port_id_ptag = libnet_build_udld_port_id((const uint8_t *)origin_port_id_str,
strlen(origin_port_id_str),
l,
0);
assert_int_not_equal(udld_tlv_port_id_ptag, (-1));
libnet_pblock_t *p = libnet_pblock_find(l, udld_tlv_port_id_ptag);
assert_non_null(p);
assert_int_equal(p->type, LIBNET_PBLOCK_UDLD_PORT_ID_H);
const uint16_t *type = (const uint16_t *)(p->buf);
const uint16_t *length = (const uint16_t *)(p->buf + tlv_length_offset);
const uint8_t *value = (const uint8_t *)(p->buf + tlv_value_offset);
assert_int_equal(ntohs(*type), LIBNET_UDLD_PORT_ID);
assert_int_equal(ntohs(*length), LIBNET_UDLD_TLV_HDR_SIZE + strlen(origin_port_id_str));
assert_memory_equal(value, (const char []){ "Gi0/1" }, strlen(origin_port_id_str));
libnet_destroy(l);
}
/* Refs: tests/data/packet_captures/UDLD.cap, Packet #1, UDLD Echo */
static void
libnet_build_udld__tlv_echo(void **state)
{
(void)state; /* unused */
char errbuf[LIBNET_ERRBUF_SIZE];
libnet_t *l = libnet_init(LIBNET_NONE, NULL, errbuf);
assert_non_null(l);
const uint8_t original_echo_id_pairs[] = { 0x01, 0x02, 0x03, 0x04 };
const uint8_t expected_echo_id_pairs[] = { 0x01, 0x02, 0x03, 0x04 };
libnet_ptag_t udld_tlv_echo_ptag = libnet_build_udld_echo(original_echo_id_pairs,
LIBNET_TEST_ARRAY_LENGTH(original_echo_id_pairs),
l,
0);
assert_int_not_equal(udld_tlv_echo_ptag, (-1));
libnet_pblock_t *p = libnet_pblock_find(l, udld_tlv_echo_ptag);
assert_non_null(p);
assert_int_equal(p->type, LIBNET_PBLOCK_UDLD_ECHO_H);
const uint16_t *type = (const uint16_t *)(p->buf);
const uint16_t *length = (const uint16_t *)(p->buf + tlv_length_offset);
const uint8_t *value = (const uint8_t *)(p->buf + tlv_value_offset);
assert_int_equal(ntohs(*type), LIBNET_UDLD_ECHO);
assert_int_equal(ntohs(*length), LIBNET_UDLD_TLV_HDR_SIZE + LIBNET_TEST_ARRAY_LENGTH(original_echo_id_pairs));
assert_int_equal(ntohs(*length) - 4/* sizeof type and length */, LIBNET_TEST_ARRAY_LENGTH(expected_echo_id_pairs));
assert_memory_equal(value, expected_echo_id_pairs, LIBNET_TEST_ARRAY_LENGTH(original_echo_id_pairs));
libnet_destroy(l);
}
/* Refs: tests/data/packet_captures/UDLD.cap, Packet #1, UDLD Message Interval */
static void
libnet_build_udld__tlv_message_interval(void **state)
{
(void)state; /* unused */
char errbuf[LIBNET_ERRBUF_SIZE];
libnet_t *l = libnet_init(LIBNET_NONE, NULL, errbuf);
assert_non_null(l);
const uint8_t message_interval = 7;
libnet_ptag_t udld_tlv_message_interval_ptag = libnet_build_udld_message_interval(&message_interval,
l,
0);
assert_int_not_equal(udld_tlv_message_interval_ptag, (-1));
libnet_pblock_t *p = libnet_pblock_find(l, udld_tlv_message_interval_ptag);
assert_non_null(p);
assert_int_equal(p->type, LIBNET_PBLOCK_UDLD_MSG_INTERVAL_H);
const uint16_t *type = (const uint16_t *)(p->buf);
const uint16_t *length = (const uint16_t *)(p->buf + tlv_length_offset);
const uint8_t *value = (const uint8_t *)(p->buf + tlv_value_offset);
assert_int_equal(ntohs(*type), LIBNET_UDLD_MESSAGE_INTERVAL);
assert_int_equal(ntohs(*length), LIBNET_UDLD_TLV_HDR_SIZE + sizeof(uint8_t));
assert_int_equal(*value, 7);
libnet_destroy(l);
}
/* Refs: tests/data/packet_captures/UDLD.cap, Packet #1, UDLD Timeout Interval */
static void
libnet_build_udld__tlv_timeout_interval(void **state)
{
(void)state; /* unused */
char errbuf[LIBNET_ERRBUF_SIZE];
libnet_t *l = libnet_init(LIBNET_NONE, NULL, errbuf);
assert_non_null(l);
const uint8_t timeout_interval = 5;
libnet_ptag_t udld_tlv_timeout_interval_ptag = libnet_build_udld_timeout_interval(&timeout_interval,
l,
0);
assert_int_not_equal(udld_tlv_timeout_interval_ptag, (-1));
libnet_pblock_t *p = libnet_pblock_find(l, udld_tlv_timeout_interval_ptag);
assert_non_null(p);
assert_int_equal(p->type, LIBNET_PBLOCK_UDLD_TMT_INTERVAL_H);
const uint16_t *type = (const uint16_t *)(p->buf);
const uint16_t *length = (const uint16_t *)(p->buf + tlv_length_offset);
const uint8_t *value = (const uint8_t *)(p->buf + tlv_value_offset);
assert_int_equal(ntohs(*type), LIBNET_UDLD_TIMEOUT_INTERVAL);
assert_int_equal(ntohs(*length), LIBNET_UDLD_TLV_HDR_SIZE + sizeof(uint8_t));
assert_int_equal(*value, 5);
libnet_destroy(l);
}
/* Refs: tests/data/packet_captures/UDLD.cap, Packet #1, UDLD Device Name */
static void
libnet_build_udld__tlv_device_name(void **state)
{
(void)state; /* unused */
char errbuf[LIBNET_ERRBUF_SIZE];
libnet_t *l = libnet_init(LIBNET_NONE, NULL, errbuf);
assert_non_null(l);
const char *device_name_str = "S1";
libnet_ptag_t udld_tlv_device_name_ptag = libnet_build_udld_device_name((const uint8_t *)device_name_str,
strlen(device_name_str),
l,
0);
assert_int_not_equal(udld_tlv_device_name_ptag, (-1));
libnet_pblock_t *p = libnet_pblock_find(l, udld_tlv_device_name_ptag);
assert_non_null(p);
assert_int_equal(p->type, LIBNET_PBLOCK_UDLD_DEVICE_NAME_H);
const uint16_t *type = (const uint16_t *)(p->buf);
const uint16_t *length = (const uint16_t *)(p->buf + tlv_length_offset);
const uint8_t *value = (const uint8_t *)(p->buf + tlv_value_offset);
assert_int_equal(ntohs(*type), LIBNET_UDLD_DEVICE_NAME);
assert_int_equal(ntohs(*length), LIBNET_UDLD_TLV_HDR_SIZE + strlen(device_name_str));
assert_memory_equal(value, (const uint8_t []){ "S1" }, strlen(device_name_str));
libnet_destroy(l);
}
/* Refs: tests/data/packet_captures/UDLD.cap, Packet #1, UDLD Sequence Number */
static void
libnet_build_udld__tlv_sequence_number(void **state)
{
(void)state; /* unused */
char errbuf[LIBNET_ERRBUF_SIZE];
libnet_t *l = libnet_init(LIBNET_NONE, NULL, errbuf);
assert_non_null(l);
const uint32_t sequence_number = 1;
libnet_ptag_t udld_tlv_sequence_number_ptag = libnet_build_udld_sequence_number((const uint8_t *)&sequence_number,
l,
0);
assert_int_not_equal(udld_tlv_sequence_number_ptag, (-1));
libnet_pblock_t *p = libnet_pblock_find(l, udld_tlv_sequence_number_ptag);
assert_non_null(p);
assert_int_equal(p->type, LIBNET_PBLOCK_UDLD_SEQ_NUMBER_H);
const uint16_t *type = (const uint16_t *)(p->buf);
const uint16_t *length = (const uint16_t *)(p->buf + tlv_length_offset);
const uint32_t *value = (const uint32_t *)(p->buf + tlv_value_offset);
assert_int_equal(ntohs(*type), LIBNET_UDLD_SEQUENCE_NUMBER);
assert_int_equal(ntohs(*length), LIBNET_UDLD_TLV_HDR_SIZE + sizeof(uint32_t));
assert_int_equal(ntohl(*value), 1);
libnet_destroy(l);
}
static void
libnet_udld__checksum_calculation(void **state)
{
(void)state; /* unused */
const uint8_t original_packet_hex[] = {
0x01,0x00,0x0c,0xcc,0xcc,0xcc,0x00,0x19,0x06,0xea,0xb8,0x81,0x00,0x44, /* 14 bytes: IEEE 802.3 Ethernet */
0xaa,0xaa,0x03,0x00,0x00,0x0c,0x01,0x11, /* 8 bytes: LLC */
0x21, /* 1 bytes: UDLD: version and opcode */
0x03, /* 1 bytes: UDLD: flags */
0x00,0x00, /* 2 bytes: UDLD: checksum */
0x00,0x01,0x00,0x0f,0x46,0x4f,0x43,0x31,0x30,0x33,0x31,0x5a,0x37,0x4a,0x47, /* 15 bytes: UDLD: Device ID */
0x00,0x02,0x00,0x09,0x47,0x69,0x30,0x2f,0x31, /* 9 bytes: UDLD: Port ID */
0x00,0x03,0x00,0x08,0x00,0x00,0x00,0x00, /* 8 bytes: UDLD: Echo */
0x00,0x04,0x00,0x05,0x07, /* 5 bytes: UDLD: Message Interval */
0x00,0x05,0x00,0x05,0x05, /* 5 bytes: UDLD: Timeout Interval */
0x00,0x06,0x00,0x06,0x53,0x31, /* 6 bytes: UDLD: Device Name */
0x00,0x07,0x00,0x08,0x00,0x00,0x00,0x01 /* 8 bytes: UDLD: Sequence Number */
};
const uint16_t expected_checksum = 0x6d85;
const uint16_t checksum = libnet_ip_check((uint16_t *)original_packet_hex + 11, /* UDLD packet offset*/
60 /* remaining bytes */
);
assert_int_equal(expected_checksum, htons(checksum));
}
/**
* Build the whole UDLD packet, including the payload and IEEE802.3 Ethernet + LLC headers.
*
* Refs: tests/data/packet_captures/UDLD.cap, Packet #2
*/
static void
libnet_build_udld__build_whole_packet_with_checksum(void **state)
{
(void)state; /* unused */
libnet_t *l = NULL;
libnet_ptag_t udld_ptag = 0;
libnet_ptag_t udld_device_id_tlv_ptag = 0;
libnet_ptag_t udld_port_id_tlv_ptag = 0;
libnet_ptag_t udld_echo_id_tlv_ptag = 0;
libnet_ptag_t udld_message_interval_ptag = 0;
libnet_ptag_t udld_timeout_interval_ptag = 0;
libnet_ptag_t udld_device_name_ptag = 0;
libnet_ptag_t udld_sequence_number_ptag = 0;
libnet_ptag_t ieee_802_2_llc_ptag = 0;
libnet_ptag_t ieee_802_3_ptag = 0;
uint32_t udld_payload_size = 0;
char error_buffer[LIBNET_ERRBUF_SIZE];
l = libnet_init(LIBNET_NONE, NULL, error_buffer);
assert_non_null(l);
/* Build UDLD */
/* Build UDLD Sequence Number TLV */
const uint32_t sequence_number = 1;
udld_sequence_number_ptag = libnet_build_udld_sequence_number((const uint8_t *)&sequence_number,
l,
0
);
assert_int_not_equal(udld_sequence_number_ptag, (-1));
udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + sizeof(uint32_t));
/* Build UDLD Device Name TLV */
const char *device_name_str = "S2";
udld_device_name_ptag = libnet_build_udld_device_name((const uint8_t *)device_name_str,
strlen(device_name_str),
l,
0
);
assert_int_not_equal(udld_device_name_ptag, (-1));
udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + strlen(device_name_str));
/* Build UDLD Timeout Interval TLV */
const uint8_t timeout_interval = 5;
udld_timeout_interval_ptag = libnet_build_udld_timeout_interval(&timeout_interval,
l,
0
);
assert_int_not_equal(udld_timeout_interval_ptag, (-1));
udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + sizeof(uint8_t));
/* Build UDLD Message Interval TLV */
const uint8_t message_interval = 7;
udld_message_interval_ptag = libnet_build_udld_message_interval(&message_interval,
l,
0
);
assert_int_not_equal(udld_message_interval_ptag, (-1));
udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + sizeof(uint8_t));
/* Build UDLD Echo TLV */
const uint8_t echo_id_pairs[] = {0x00, 0x00, 0x00, 0x01, 0x00, 0x0b,
0x46, 0x4f, 0x43, 0x31, 0x30, 0x33,
0x31, 0x5a, 0x37, 0x4a, 0x47, 0x00,
0x05, 0x47, 0x69, 0x30, 0x2f, 0x31};
udld_echo_id_tlv_ptag = libnet_build_udld_echo(echo_id_pairs,
LIBNET_TEST_ARRAY_LENGTH(echo_id_pairs),
l,
0
);
assert_int_not_equal(udld_echo_id_tlv_ptag, (-1));
udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + sizeof(echo_id_pairs));
/* Build UDLD Port ID TLV */
const char *port_id_str = "Fa0/1";
udld_port_id_tlv_ptag = libnet_build_udld_port_id((const uint8_t *)port_id_str,
strlen(port_id_str),
l,
0
);
assert_int_not_equal(udld_port_id_tlv_ptag, (-1));
udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + strlen(port_id_str));
/* Build UDLD Device ID TLV */
const char *device_id_str = "FOC1025X4W3";
udld_device_id_tlv_ptag = libnet_build_udld_device_id((const uint8_t *)device_id_str,
strlen(device_id_str),
l,
0
);
assert_int_not_equal(udld_device_id_tlv_ptag, (-1));
udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + strlen(device_id_str));
assert_int_equal(udld_payload_size, 76);
int flags = 0;
udld_ptag = libnet_build_udld_hdr(
LIBNET_UDLD_PDU_VERSION, /* version */
LIBNET_UDLD_PDU_OPCODE_ECHO, /* opcode */
flags, /* flags */
0, /* checksum */
NULL, /* payload*/
0, /* payload_s */
l, /* libnet context */
0 /* libnet ptag */
);
assert_int_not_equal(udld_ptag, (-1));
/* Build IEEE 802.2 snap LLC */
uint8_t OUI[3] = LIBNET_UDLD_OID;
ieee_802_2_llc_ptag = libnet_build_802_2snap(0xAA, /* DSAP */
0xAA, /* SSAP */
0x03, /* Control */
OUI, /* OUI */
LIBNET_UDLD_HDLC_PROTO_TYPE, /* Type */
NULL, /* Payload */
0, /* Payload_s */
l,
0
);
assert_int_not_equal(ieee_802_2_llc_ptag, (-1));
/* Build IEEE 802.3 */
uint8_t udld_dst_mac[6] = LIBNET_UDLD_DEST_MAC;
uint8_t udld_src_mac_dummy[6] = { 0x00, 0x19, 0x06, 0xEA, 0xB8, 0x81 };
ieee_802_3_ptag = libnet_build_802_3(udld_dst_mac, /* ethernet destination */
udld_src_mac_dummy, /* ethernet source */
LIBNET_802_2SNAP_H + /* */
LIBNET_UDLD_H + udld_payload_size, /* */
NULL, /* payload */
0, /* payload size */
l, /* libnet context */
0
);
assert_int_not_equal(ieee_802_3_ptag, (-1));
/**
* Assembly packet.
* Verify checksum correctness.
* */
{
uint8_t *packet = NULL;
uint32_t packet_length = 0;
int rv = (-1);
/* like libnet_write but only assembly packet, NOT sending it to the network */
rv = libnet_pblock_coalesce(l, &packet, &packet_length);
assert_int_not_equal(rv, UINT32_MAX);
struct libnet_udld_hdr *udld_hdr = (struct libnet_udld_hdr *)(packet + (LIBNET_802_3_H + LIBNET_802_2SNAP_H));
const uint32_t expected_checksum = 0x805d;
assert_int_equal(htons(udld_hdr->checksum), expected_checksum);
}
libnet_destroy(l);
}
int
main(void)
{
const struct CMUnitTest tests[] = {
cmocka_unit_test(libnet_udld__checksum_calculation),
cmocka_unit_test(libnet_build_udld__pdu_header_only),
cmocka_unit_test(libnet_build_udld__tlv_device_id),
cmocka_unit_test(libnet_build_udld__tlv_port_id),
cmocka_unit_test(libnet_build_udld__tlv_echo),
cmocka_unit_test(libnet_build_udld__tlv_message_interval),
cmocka_unit_test(libnet_build_udld__tlv_timeout_interval),
cmocka_unit_test(libnet_build_udld__tlv_device_name),
cmocka_unit_test(libnet_build_udld__tlv_sequence_number),
cmocka_unit_test(libnet_build_udld__build_whole_packet_with_checksum),
};
return cmocka_run_group_tests(tests, NULL, NULL);
}
/**
* Local Variables:
* indent-tabs-mode: nil
* c-file-style: "stroustrup"
* End:
*/
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