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test: add imitate_tcp_packet test case (TCP over IPv6 over IPv4, with TCP payload)

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luwenpeng
2024-07-03 15:22:20 +08:00
parent e502b565e5
commit 5a540d542d
1 changed files with 118 additions and 0 deletions
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118
src/packet/test/gtest_packet_build.cpp
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@@ -168,6 +168,124 @@ TEST(PACKET_BUILD, ETH_IP4_TCP)
}
#endif
/******************************************************************************
* [Protocols in frame: eth:ethertype:ip:ipv6:tcp]
******************************************************************************
*
* Frame 1: 106 bytes on wire (848 bits), 106 bytes captured (848 bits)
* Ethernet II, Src: JuniperN_45:88:29 (2c:6b:f5:45:88:29), Dst: JuniperN_2a:a2:00 (5c:5e:ab:2a:a2:00)
* Destination: JuniperN_2a:a2:00 (5c:5e:ab:2a:a2:00)
* Source: JuniperN_45:88:29 (2c:6b:f5:45:88:29)
* Type: IPv4 (0x0800)
* Internet Protocol Version 4, Src: 210.77.88.163, Dst: 59.66.4.50
* 0100 .... = Version: 4
* .... 0101 = Header Length: 20 bytes (5)
* Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
* Total Length: 92
* Identification: 0x0b4d (2893)
* 000. .... = Flags: 0x0
* ...0 0000 0000 0000 = Fragment Offset: 0
* Time to Live: 59
* Protocol: IPv6 (41)
* Header Checksum: 0x09c8 [validation disabled]
* [Header checksum status: Unverified]
* Source Address: 210.77.88.163
* Destination Address: 59.66.4.50
* Internet Protocol Version 6, Src: 2001:da8:200:900e:200:5efe:d24d:58a3, Dst: 2600:140e:6::1702:1058
* 0110 .... = Version: 6
* .... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
* .... 0000 0000 0000 0000 0000 = Flow Label: 0x00000
* Payload Length: 32
* Next Header: TCP (6)
* Hop Limit: 64
* Source Address: 2001:da8:200:900e:200:5efe:d24d:58a3
* Destination Address: 2600:140e:6::1702:1058
* [Source ISATAP IPv4: 210.77.88.163]
* Transmission Control Protocol, Src Port: 52556, Dst Port: 80, Seq: 0, Len: 0
* Source Port: 52556
* Destination Port: 80
* [Stream index: 0]
* [Conversation completeness: Complete, WITH_DATA (31)]
* [TCP Segment Len: 0]
* Sequence Number: 0 (relative sequence number)
* Sequence Number (raw): 2172673142
* [Next Sequence Number: 1 (relative sequence number)]
* Acknowledgment Number: 0
* Acknowledgment number (raw): 0
* 1000 .... = Header Length: 32 bytes (8)
* Flags: 0x002 (SYN)
* Window: 8192
* [Calculated window size: 8192]
* Checksum: 0xf757 [unverified]
* [Checksum Status: Unverified]
* Urgent Pointer: 0
* Options: (12 bytes), Maximum segment size, No-Operation (NOP), Window scale, No-Operation (NOP), No-Operation (NOP), SACK permitted
* [Timestamps]
*/
unsigned char data2[] = {
0x5c, 0x5e, 0xab, 0x2a, 0xa2, 0x00, 0x2c, 0x6b, 0xf5, 0x45, 0x88, 0x29, 0x08, 0x00, 0x45, 0x00, 0x00, 0x5c, 0x0b, 0x4d, 0x00, 0x00, 0x3b, 0x29, 0x09, 0xc8,
0xd2, 0x4d, 0x58, 0xa3, 0x3b, 0x42, 0x04, 0x32, 0x60, 0x00, 0x00, 0x00, 0x00, 0x20, 0x06, 0x40, 0x20, 0x01, 0x0d, 0xa8, 0x02, 0x00, 0x90, 0x0e, 0x02, 0x00,
0x5e, 0xfe, 0xd2, 0x4d, 0x58, 0xa3, 0x26, 0x00, 0x14, 0x0e, 0x00, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x17, 0x02, 0x10, 0x58, 0xcd, 0x4c, 0x00, 0x50,
0x81, 0x80, 0x5c, 0x76, 0x00, 0x00, 0x00, 0x00, 0x80, 0x02, 0x20, 0x00, 0xf7, 0x57, 0x00, 0x00, 0x02, 0x04, 0x04, 0xc4, 0x01, 0x03, 0x03, 0x08, 0x01, 0x01,
0x04, 0x02};
/*
* imitate_tcp_packet()
* -> ETH->IPv4->IPv6->TCP
* -> with TCP payload
*/
#if 1
TEST(PACKET_BUILD, ETH_IP4_IP6_TCP)
{
struct packet orig_pkt;
memset(&orig_pkt, 0, sizeof(orig_pkt));
packet_parse(&orig_pkt, (const char *)data2, sizeof(data2));
PRINT_GREEN("origin packet:");
packet_print(&orig_pkt);
struct packet *new_pkt = imitate_tcp_packet(&orig_pkt, 1234, 2345, TH_ACK, NULL, 0, "Hello", 5);
EXPECT_TRUE(new_pkt != nullptr);
PRINT_GREEN("new packet:");
packet_print(new_pkt);
packet_dump_hex(new_pkt, STDOUT_FILENO);
packet_dump_pcap(new_pkt, "imitate-eth-ipv4-ipv6-tcp.pcap");
const char *orig_pkt_data = packet_get_raw_data(&orig_pkt);
uint16_t orig_pkt_len = packet_get_raw_len(&orig_pkt);
const char *new_pkt_data = packet_get_raw_data(new_pkt);
uint16_t new_pkt_len = packet_get_raw_len(new_pkt);
EXPECT_TRUE(orig_pkt_len - 12 == // trim TCP options
new_pkt_len - 5 // trim TCP payload
);
for (uint16_t i = 0; i < new_pkt_len - 5; i++)
{
if ((16 <= i && i <= 17) || // skip IPv4 total length
(18 <= i && i <= 19) || // skip IPv4 identification
i == 22 || // skip IPv4 TTL
(24 <= i && i <= 25) || // skip IPv4 checksum
(38 <= i && i <= 39) || // skip IPv6 payload length
i == 41 || // skip IPv6 hop limit
(78 <= i && i <= 81) || // skip TCP seq
(82 <= i && i <= 85) || // skip TCP ack
i == 86 || // skip TCP data offset
i == 87 || // skip TCP flags
(88 <= i && i <= 89) || // skip TCP window
(90 <= i && i <= 91) // skip TCP checksum
)
{
continue;
}
// printf(("idx: %d, orig: %02x, new: %02x\n"), i, orig_pkt_data[i], new_pkt_data[i]);
EXPECT_TRUE(orig_pkt_data[i] == new_pkt_data[i]);
}
}
#endif
int main(int argc, char **argv)
{
::testing::InitGoogleTest(&argc, argv);