| DNS Client Application |
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| Requirements |
| ------------ |
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| * Ethernet LAN for testing purposes. |
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| * Galileo Gen 2 Development Board. |
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| * USB-UART cable: CH340, FTDI 6-pin or equivalent for debugging. |
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| * dnsmasq application. The dnsmasq version used in this sample is: |
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| dnsmasq -v |
| Dnsmasq version 2.75 Copyright (c) 2000-2015 Simon Kelley |
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| Building instructions |
| --------------------- |
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| * Read src/tcp_config.h, change the IP addresses according to the LAN |
| environment. |
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| * make pristine && make are enough to build this sample. |
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| * Follow the steps indicated here: |
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| https://www.zephyrproject.org/doc/board/galileo.html |
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| to load the binary into the Galileo Dev Board. |
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| Usage |
| ----- |
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| * Open a terminal window and type: |
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| dnsmasq -d |
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| * Connect the USB-UART cable to the Galileo. Open a terminal and run: |
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| screen /dev/ttyUSB0 115200 |
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| * Connect Galileo to the LAN, Turn on the board. |
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| * The screen terminal window will show: |
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| ----------------------------------------- |
| Domain name: not_a_real_domain_name |
| [fiber:89] DNS Query: OK, ID: 0 |
| [fiber:92] TX: OK |
| [fiber:97] RX: OK |
| [fiber:102] DNS Response: ERROR <- :) |
| |
| ----------------------------------------- |
| Domain name: linuxfoundation.org |
| [fiber:89] DNS Query: OK, ID: 1 |
| [fiber:92] TX: OK |
| [fiber:97] RX: OK |
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| ****** DNS ANSWER: 0 ****** |
| Response: IP address Size: 4: 140 211 169 4 |
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| [fiber:102] DNS Response: OK |
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| ----------------------------------------- |
| Domain name: www.linuxfoundation.org |
| [fiber:89] DNS Query: OK, ID: 2 |
| [fiber:92] TX: OK |
| [fiber:97] RX: OK |
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| ****** DNS ANSWER: 0 ****** |
| Response: IP address Size: 4: 140 211 169 4 |
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| [fiber:102] DNS Response: OK |
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| ----------------------------------------- |
| Domain name: gnu.org |
| [fiber:89] DNS Query: OK, ID: 3 |
| [fiber:92] TX: OK |
| [fiber:97] RX: OK |
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| ****** DNS ANSWER: 0 ****** |
| Response: IP address Size: 4: 208 118 235 148 |
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| [fiber:102] DNS Response: OK |
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| ----------------------------------------- |
| Domain name: www.gnu.org |
| [fiber:89] DNS Query: OK, ID: 4 |
| [fiber:92] TX: OK |
| [fiber:97] RX: OK |
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| ****** DNS ANSWER: 0 ****** |
| Response: CNAME NO IP address |
| CNAME: wildebeest.gnu.org |
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| ****** DNS ANSWER: 1 ****** |
| Response: IP address Size: 4: 208 118 235 148 |
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| [fiber:102] DNS Response: OK |
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| ----------------------------------------- |
| Domain name: npr.org |
| [fiber:89] DNS Query: OK, ID: 5 |
| [fiber:92] TX: OK |
| [fiber:97] RX: OK |
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| ****** DNS ANSWER: 0 ****** |
| Response: IP address Size: 4: 216 35 221 76 |
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| [fiber:102] DNS Response: OK |
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| ----------------------------------------- |
| Domain name: www.npr.org |
| [fiber:89] DNS Query: OK, ID: 6 |
| [fiber:92] TX: OK |
| [fiber:97] RX: OK |
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| ****** DNS ANSWER: 0 ****** |
| Response: CNAME NO IP address |
| CNAME: www-cdn.npr.org.edgesuite.net |
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| ****** DNS ANSWER: 1 ****** |
| Response: CNAME NO IP address |
| CNAME: a1723.g.akamai.net |
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| ****** DNS ANSWER: 2 ****** |
| Response: IP address Size: 4: 63 80 4 192 |
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| ****** DNS ANSWER: 3 ****** |
| Response: IP address Size: 4: 63 80 4 161 |
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| [fiber:102] DNS Response: OK |