test: add imitate_udp_packet test case (UDP over GER, with GRE payload length, with UDP payload)
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luwenpeng
@@ -783,6 +783,237 @@ TEST(PACKET_CRAFT_TCP, ETH_IP4_GRE_IP6_TCP)
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}
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}
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#endif
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#endif
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/******************************************************************************
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* [Protocols in frame: eth:ethertype:vlan:ethertype:ipv6:ip:gre:ppp:ip:udp:dns]
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******************************************************************************
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*
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* Frame 1: 197 bytes on wire (1576 bits), 197 bytes captured (1576 bits)
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* Ethernet II, Src: JuniperNetwo_f2:61:3d (00:12:1e:f2:61:3d), Dst: c5:00:00:00:82:c4 (c5:00:00:00:82:c4)
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* Destination: c5:00:00:00:82:c4 (c5:00:00:00:82:c4)
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* Source: JuniperNetwo_f2:61:3d (00:12:1e:f2:61:3d)
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* Type: 802.1Q Virtual LAN (0x8100)
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* 802.1Q Virtual LAN, PRI: 0, DEI: 0, ID: 100
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* 000. .... .... .... = Priority: Best Effort (default) (0)
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* ...0 .... .... .... = DEI: Ineligible
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* .... 0000 0110 0100 = ID: 100
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* Type: IPv6 (0x86dd)
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* Internet Protocol Version 6, Src: 2402:f000:1:8e01::5555, Dst: 2607:fcd0:100:2300::b108:2a6b
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* 0110 .... = Version: 6
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* .... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
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* .... 0000 00.. .... .... .... .... .... = Differentiated Services Codepoint: Default (0)
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* .... .... ..00 .... .... .... .... .... = Explicit Congestion Notification: Not ECN-Capable Transport (0)
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* .... 0000 0000 0000 0000 0000 = Flow Label: 0x00000
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* Payload Length: 139
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* Next Header: IPIP (4)
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* Hop Limit: 246
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* Source Address: 2402:f000:1:8e01::5555
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* Destination Address: 2607:fcd0:100:2300::b108:2a6b
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* Internet Protocol Version 4, Src: 16.0.0.200, Dst: 192.52.166.154
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* 0100 .... = Version: 4
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* .... 0101 = Header Length: 20 bytes (5)
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* Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
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* 0000 00.. = Differentiated Services Codepoint: Default (0)
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* .... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
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* Total Length: 139
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* Identification: 0x8caf (36015)
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* 000. .... = Flags: 0x0
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* 0... .... = Reserved bit: Not set
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* .0.. .... = Don't fragment: Not set
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* ..0. .... = More fragments: Not set
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* ...0 0000 0000 0000 = Fragment Offset: 0
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* Time to Live: 64
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* Protocol: Generic Routing Encapsulation (47)
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* Header Checksum: 0x75fe [correct]
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* [Header checksum status: Good]
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* [Calculated Checksum: 0x75fe]
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* Source Address: 16.0.0.200
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* Destination Address: 192.52.166.154
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* Generic Routing Encapsulation (PPP)
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* Flags and Version: 0x3081
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* 0... .... .... .... = Checksum Bit: No
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* .0.. .... .... .... = Routing Bit: No
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* ..1. .... .... .... = Key Bit: Yes
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* ...1 .... .... .... = Sequence Number Bit: Yes
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* .... 0... .... .... = Strict Source Route Bit: No
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* .... .000 .... .... = Recursion control: 0
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* .... .... 1... .... = Acknowledgment: Yes
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* .... .... .000 0... = Flags (Reserved): 0
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* .... .... .... .001 = Version: Enhanced GRE (1)
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* Protocol Type: PPP (0x880b)
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* Payload Length: 103
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* Call ID: 6016
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* Sequence Number: 430001
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* Acknowledgment Number: 539254
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* Point-to-Point Protocol
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* Address: 0xff
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* Control: 0x03
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* Protocol: Internet Protocol version 4 (0x0021)
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* Internet Protocol Version 4, Src: 172.16.44.3, Dst: 8.8.8.8
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* 0100 .... = Version: 4
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* .... 0101 = Header Length: 20 bytes (5)
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* Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
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* 0000 00.. = Differentiated Services Codepoint: Default (0)
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* .... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
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* Total Length: 99
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* Identification: 0x0000 (0)
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* 010. .... = Flags: 0x2, Don't fragment
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* 0... .... = Reserved bit: Not set
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* .1.. .... = Don't fragment: Set
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* ..0. .... = More fragments: Not set
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* ...0 0000 0000 0000 = Fragment Offset: 0
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* Time to Live: 60
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* Protocol: UDP (17)
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* Header Checksum: 0x5667 [correct]
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* [Header checksum status: Good]
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* [Calculated Checksum: 0x5667]
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* Source Address: 172.16.44.3
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* Destination Address: 8.8.8.8
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* User Datagram Protocol, Src Port: 40768, Dst Port: 53
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* Source Port: 40768
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* Destination Port: 53
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* Length: 79
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* Checksum: 0x2d23 [correct]
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* [Calculated Checksum: 0x2d23]
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* [Checksum Status: Good]
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* [Stream index: 0]
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* [Timestamps]
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* [Time since first frame: 0.000000000 seconds]
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* [Time since previous frame: 0.000000000 seconds]
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* UDP payload (71 bytes)
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* Domain Name System (query)
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* Transaction ID: 0xa62c
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* Flags: 0x0100 Standard query
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* 0... .... .... .... = Response: Message is a query
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* .000 0... .... .... = Opcode: Standard query (0)
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* .... ..0. .... .... = Truncated: Message is not truncated
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* .... ...1 .... .... = Recursion desired: Do query recursively
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* .... .... .0.. .... = Z: reserved (0)
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* .... .... ...0 .... = Non-authenticated data: Unacceptable
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* Questions: 1
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* Answer RRs: 0
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* Authority RRs: 0
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* Additional RRs: 0
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* Queries
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* xqt-detect-mode2-97712e88-167a-45b9-93ee-913140e76678: type AAAA, class IN
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* Name: xqt-detect-mode2-97712e88-167a-45b9-93ee-913140e76678
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* [Name Length: 53]
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* [Label Count: 1]
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* Type: AAAA (28) (IP6 Address)
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* Class: IN (0x0001)
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* [Response In: 2]
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*/
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unsigned char data5[] = {
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0xc5, 0x00, 0x00, 0x00, 0x82, 0xc4, 0x00, 0x12, 0x1e, 0xf2, 0x61, 0x3d, 0x81, 0x00, 0x00, 0x64, 0x86, 0xdd, 0x60, 0x00, 0x00, 0x00, 0x00, 0x8b, 0x04, 0xf6,
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0x24, 0x02, 0xf0, 0x00, 0x00, 0x01, 0x8e, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0x55, 0x26, 0x07, 0xfc, 0xd0, 0x01, 0x00, 0x23, 0x00, 0x00, 0x00,
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0x00, 0x00, 0xb1, 0x08, 0x2a, 0x6b, 0x45, 0x00, 0x00, 0x8b, 0x8c, 0xaf, 0x00, 0x00, 0x40, 0x2f, 0x75, 0xfe, 0x10, 0x00, 0x00, 0xc8, 0xc0, 0x34, 0xa6, 0x9a,
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0x30, 0x81, 0x88, 0x0b, 0x00, 0x67, 0x17, 0x80, 0x00, 0x06, 0x8f, 0xb1, 0x00, 0x08, 0x3a, 0x76, 0xff, 0x03, 0x00, 0x21, 0x45, 0x00, 0x00, 0x63, 0x00, 0x00,
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0x40, 0x00, 0x3c, 0x11, 0x56, 0x67, 0xac, 0x10, 0x2c, 0x03, 0x08, 0x08, 0x08, 0x08, 0x9f, 0x40, 0x00, 0x35, 0x00, 0x4f, 0x2d, 0x23, 0xa6, 0x2c, 0x01, 0x00,
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0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x35, 0x78, 0x71, 0x74, 0x2d, 0x64, 0x65, 0x74, 0x65, 0x63, 0x74, 0x2d, 0x6d, 0x6f, 0x64, 0x65, 0x32, 0x2d,
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0x39, 0x37, 0x37, 0x31, 0x32, 0x65, 0x38, 0x38, 0x2d, 0x31, 0x36, 0x37, 0x61, 0x2d, 0x34, 0x35, 0x62, 0x39, 0x2d, 0x39, 0x33, 0x65, 0x65, 0x2d, 0x39, 0x31,
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0x33, 0x31, 0x34, 0x30, 0x65, 0x37, 0x36, 0x36, 0x37, 0x38, 0x00, 0x00, 0x1c, 0x00, 0x01};
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/*
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* craft_udp_packet()
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* -> ETH->VLAN->IPv6->IPv4->GRE->PPP->IPv4->UDP->DNS
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* -> with UDP payload
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* -> with GRE payload length
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*/
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#if 1
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TEST(PACKET_CRAFT_UDP, ETH_VLAN_IPv6_IPv4_GRE_PPP_IPv4_UDP_DNS)
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{
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struct packet orig_pkt;
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memset(&orig_pkt, 0, sizeof(orig_pkt));
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packet_parse(&orig_pkt, (const char *)data5, sizeof(data5));
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PRINT_GREEN("origin packet:");
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packet_print(&orig_pkt);
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struct packet *new_pkt = craft_udp_packet(&orig_pkt, "Hello", 5);
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EXPECT_TRUE(new_pkt != nullptr);
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PRINT_GREEN("new packet:");
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packet_print(new_pkt);
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packet_dump_hex(new_pkt, STDOUT_FILENO);
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packet_dump_pcap(new_pkt, "craft-eth-vlan-ipv6-ipv4-gre-ppp-ipv4-udp-dns.pcap");
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const char *orig_pkt_data = packet_get_raw_data(&orig_pkt);
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uint16_t orig_pkt_len = packet_get_raw_len(&orig_pkt);
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const char *new_pkt_data = packet_get_raw_data(new_pkt);
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uint16_t new_pkt_len = packet_get_raw_len(new_pkt);
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EXPECT_TRUE(orig_pkt_len - 71 == // trim DNS payload
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new_pkt_len - 5); // trim UDP payload
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int count = 0;
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struct layer layer;
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PACKET_FOREACH_LAYER_INORDER(new_pkt, layer)
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{
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if (layer.proto == LAYER_PROTO_IPV6)
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{
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const struct ip6_hdr *ip6 = (const struct ip6_hdr *)layer.hdr.raw;
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EXPECT_TRUE(ip6_hdr_get_payload_len(ip6) == 73);
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}
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if (layer.proto == LAYER_PROTO_IPV4)
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{
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const struct ip *ip = (const struct ip *)layer.hdr.raw;
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if (count == 0)
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{
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EXPECT_TRUE(ip4_hdr_get_total_len(ip) == 73);
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EXPECT_TRUE(ip4_hdr_get_checksum(ip) == 0x7640);
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}
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else
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{
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EXPECT_TRUE(ip4_hdr_get_total_len(ip) == 33);
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EXPECT_TRUE(ip4_hdr_get_checksum(ip) == 0x56a9);
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}
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count++;
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}
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if (layer.proto == LAYER_PROTO_GRE)
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{
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const struct gre1_hdr *gre = (const struct gre1_hdr *)layer.hdr.raw;
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EXPECT_TRUE(gre1_hdr_get_version(gre) == 1);
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EXPECT_TRUE(gre1_hdr_get_payload_length(gre) == 37);
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}
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if (layer.proto == LAYER_PROTO_UDP)
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{
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const struct udphdr *udp = (const struct udphdr *)layer.hdr.raw;
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EXPECT_TRUE(udp_hdr_get_total_len(udp) == 13);
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EXPECT_TRUE(udp_hdr_get_checksum(udp) == 0x5469);
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}
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}
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for (uint16_t i = 0; i < new_pkt_len - 5; i++)
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{
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if (22 <= i && i <= 23) /// skip IPv6 payload length
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{
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continue;
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}
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if ((60 <= i && i <= 61) || // skip IPv4 total length
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(68 <= i && i <= 69)) // skip IPv4 checksum
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{
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continue;
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}
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if ((82 <= i && i <= 83)) // skip GRE payload length
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{
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continue;
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}
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if ((100 <= i && i <= 101) || // skip IPv4 total length
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(108 <= i && i <= 109)) // skip IPv4 checksum
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{
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continue;
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}
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if ((122 <= i && i <= 123) || // skip UDP total length
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(124 <= i && i <= 125)) // skip UDP checksum
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{
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continue;
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}
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printf(("idx: %d, orig: %02x, new: %02x\n"), i, orig_pkt_data[i], new_pkt_data[i]);
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EXPECT_TRUE(orig_pkt_data[i] == new_pkt_data[i]);
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}
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}
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#endif
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int main(int argc, char **argv)
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int main(int argc, char **argv)
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{
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{
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::testing::InitGoogleTest(&argc, argv);
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::testing::InitGoogleTest(&argc, argv);
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