1 /* 2 No. Time Source Destination Protocol Length Info 3 42 2.441991000 192.168.0.1 192.168.0.105 DNS 178 Standard query response 0x0002 MX 40 alt3.aspmx.l.google.com MX 30 alt2.aspmx.l.google.com MX 10 aspmx.l.google.com MX 20 alt1.aspmx.l.google.com MX 50 alt4.aspmx.l.google.com 4 5 Frame 171: 178 bytes on wire (1424 bits), 178 bytes captured (1424 bits) 6 Ethernet II, Src: TendaTec_60:4b:46 (c8:3a:35:60:4b:46), Dst: Dell_33:c1:bd (18:03:73:33:c1:bd) 7 Internet Protocol Version 4, Src: 192.168.0.1 (192.168.0.1), Dst: 192.168.0.105 (192.168.0.105) 8 User Datagram Protocol, Src Port: domain (53), Dst Port: 53738 (53738) 9 Domain Name System (response) 10 Request In: 164 11 Time: 0.037374000 seconds 12 Transaction ID: 0x0002 13 Flags: 0x8180 (Standard query response, No error) 14 Questions: 1 15 Answer RRs: 5 16 Authority RRs: 0 17 Additional RRs: 0 18 Queries 19 google.com: type MX, class IN 20 Answers 21 google.com: type MX, class IN, preference 50, mx alt4.aspmx.l.google.com 22 Name: google.com 23 Type: MX (Mail exchange) 24 Class: IN (0x0001) 25 Time to live: 10 minutes 26 Data length: 17 27 Preference: 50 28 Mail exchange: alt4.aspmx.l.google.com 29 google.com: type MX, class IN, preference 30, mx alt2.aspmx.l.google.com 30 Name: google.com 31 Type: MX (Mail exchange) 32 Class: IN (0x0001) 33 Time to live: 10 minutes 34 Data length: 9 35 Preference: 30 36 Mail exchange: alt2.aspmx.l.google.com 37 google.com: type MX, class IN, preference 10, mx aspmx.l.google.com 38 Name: google.com 39 Type: MX (Mail exchange) 40 Class: IN (0x0001) 41 Time to live: 10 minutes 42 Data length: 4 43 Preference: 10 44 Mail exchange: aspmx.l.google.com 45 google.com: type MX, class IN, preference 20, mx alt1.aspmx.l.google.com 46 Name: google.com 47 Type: MX (Mail exchange) 48 Class: IN (0x0001) 49 Time to live: 10 minutes 50 Data length: 9 51 Preference: 20 52 Mail exchange: alt1.aspmx.l.google.com 53 google.com: type MX, class IN, preference 40, mx alt3.aspmx.l.google.com 54 Name: google.com 55 Type: MX (Mail exchange) 56 Class: IN (0x0001) 57 Time to live: 10 minutes 58 Data length: 9 59 Preference: 40 60 Mail exchange: alt3.aspmx.l.google.com 61 */ 62 63 char response_mx_google_com_pkt[178] = { 64 0x18, 0x03, 0x73, 0x33, 0xc1, 0xbd, 0xc8, 0x3a, 65 0x35, 0x60, 0x4b, 0x46, 0x08, 0x00, 0x45, 0x00, 66 0x00, 0xa4, 0x98, 0xa1, 0x00, 0x00, 0x40, 0x11, 67 0x5f, 0xed, 0xc0, 0xa8, 0x00, 0x01, 0xc0, 0xa8, 68 0x00, 0x69, 0x00, 0x35, 0xd1, 0xea, 0x00, 0x90, 69 0x68, 0x6a, 0x00, 0x02, 0x81, 0x80, 0x00, 0x01, 70 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x06, 0x67, 71 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x03, 0x63, 0x6f, 72 0x6d, 0x00, 0x00, 0x0f, 0x00, 0x01, 0xc0, 0x0c, 73 0x00, 0x0f, 0x00, 0x01, 0x00, 0x00, 0x02, 0x58, 74 0x00, 0x11, 0x00, 0x32, 0x04, 0x61, 0x6c, 0x74, 75 0x34, 0x05, 0x61, 0x73, 0x70, 0x6d, 0x78, 0x01, 76 0x6c, 0xc0, 0x0c, 0xc0, 0x0c, 0x00, 0x0f, 0x00, 77 0x01, 0x00, 0x00, 0x02, 0x58, 0x00, 0x09, 0x00, 78 0x1e, 0x04, 0x61, 0x6c, 0x74, 0x32, 0xc0, 0x2f, 79 0xc0, 0x0c, 0x00, 0x0f, 0x00, 0x01, 0x00, 0x00, 80 0x02, 0x58, 0x00, 0x04, 0x00, 0x0a, 0xc0, 0x2f, 81 0xc0, 0x0c, 0x00, 0x0f, 0x00, 0x01, 0x00, 0x00, 82 0x02, 0x58, 0x00, 0x09, 0x00, 0x14, 0x04, 0x61, 83 0x6c, 0x74, 0x31, 0xc0, 0x2f, 0xc0, 0x0c, 0x00, 84 0x0f, 0x00, 0x01, 0x00, 0x00, 0x02, 0x58, 0x00, 85 0x09, 0x00, 0x28, 0x04, 0x61, 0x6c, 0x74, 0x33, 86 0xc0, 0x2f 87 }; 88 89 int response_mx_google_com_pkt_size = sizeof(response_mx_google_com_pkt);