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| -rw-r--r-- | .gitattributes | 1 | ||||
| -rw-r--r-- | README.md | 37 | ||||
| -rw-r--r-- | app/main.go | 48 | ||||
| -rw-r--r-- | codecrafters.yml | 11 | ||||
| -rw-r--r-- | go.mod | 11 | ||||
| -rw-r--r-- | go.sum | 0 | ||||
| -rwxr-xr-x | your_server.sh | 15 |
7 files changed, 123 insertions, 0 deletions
diff --git a/.gitattributes b/.gitattributes new file mode 100644 index 0000000..176a458 --- /dev/null +++ b/.gitattributes @@ -0,0 +1 @@ +* text=auto diff --git a/README.md b/README.md new file mode 100644 index 0000000..0ee1ebc --- /dev/null +++ b/README.md @@ -0,0 +1,37 @@ +[](https://app.codecrafters.io/users/codecrafters-bot?r=2qF) + +This is a starting point for Go solutions to the +["Build Your Own DNS server" Challenge](https://app.codecrafters.io/courses/dns-server/overview). + +In this challenge, you'll build a DNS server that's capable of parsing and +creating DNS packets, responding to DNS queries, handling various record types +and doing recursive resolve. Along the way we'll learn about the DNS protocol, +DNS packet format, root servers, authoritative servers, forwarding servers, +various record types (A, AAAA, CNAME, etc) and more. + +**Note**: If you're viewing this repo on GitHub, head over to +[codecrafters.io](https://codecrafters.io) to try the challenge. + +# Passing the first stage + +The entry point for your `your_server.sh` implementation is in `app/main.go`. +Study and uncomment the relevant code, and push your changes to pass the first +stage: + +```sh +git add . +git commit -m "pass 1st stage" # any msg +git push origin master +``` + +Time to move on to the next stage! + +# Stage 2 & beyond + +Note: This section is for stages 2 and beyond. + +1. Ensure you have `go (1.19)` installed locally +1. Run `./your_server.sh` to run your program, which is implemented in + `app/main.go`. +1. Commit your changes and run `git push origin master` to submit your solution + to CodeCrafters. Test output will be streamed to your terminal. diff --git a/app/main.go b/app/main.go new file mode 100644 index 0000000..36c8519 --- /dev/null +++ b/app/main.go @@ -0,0 +1,48 @@ +package main + +import ( + "fmt" + // Uncomment this block to pass the first stage + // "net" +) + +func main() { + // You can use print statements as follows for debugging, they'll be visible when running tests. + fmt.Println("Logs from your program will appear here!") + + // Uncomment this block to pass the first stage + // + // udpAddr, err := net.ResolveUDPAddr("udp", "127.0.0.1:2053") + // if err != nil { + // fmt.Println("Failed to resolve UDP address:", err) + // return + // } + // + // udpConn, err := net.ListenUDP("udp", udpAddr) + // if err != nil { + // fmt.Println("Failed to bind to address:", err) + // return + // } + // defer udpConn.Close() + // + // buf := make([]byte, 512) + // + // for { + // size, source, err := udpConn.ReadFromUDP(buf) + // if err != nil { + // fmt.Println("Error receiving data:", err) + // break + // } + // + // receivedData := string(buf[:size]) + // fmt.Printf("Received %d bytes from %s: %s\n", size, source, receivedData) + // + // // Create an empty response + // response := []byte{} + // + // _, err = udpConn.WriteToUDP(response, source) + // if err != nil { + // fmt.Println("Failed to send response:", err) + // } + // } +} diff --git a/codecrafters.yml b/codecrafters.yml new file mode 100644 index 0000000..77886cf --- /dev/null +++ b/codecrafters.yml @@ -0,0 +1,11 @@ +# Set this to true if you want debug logs. +# +# These can be VERY verbose, so we suggest turning them off +# unless you really need them. +debug: false + +# Use this to change the Go version used to run your code +# on Codecrafters. +# +# Available versions: go-1.22 +language_pack: go-1.22 @@ -0,0 +1,11 @@ +// DON'T EDIT THIS! +// +// Codecrafters relies on this file being intact to run tests successfully. Any changes +// here will not reflect when CodeCrafters tests your code, and might even cause build +// failures. +// +// DON'T EDIT THIS! + +module github.com/codecrafters-io/dns-server-starter-go + +go 1.22 diff --git a/your_server.sh b/your_server.sh new file mode 100755 index 0000000..9f7a730 --- /dev/null +++ b/your_server.sh @@ -0,0 +1,15 @@ +#!/bin/sh +# +# DON'T EDIT THIS! +# +# CodeCrafters uses this file to test your code. Don't make any changes here! +# +# DON'T EDIT THIS! +set -e + +tmpFile=$(mktemp) + +( cd $(dirname "$0") && + go build -o "$tmpFile" app/*.go ) + +exec "$tmpFile" "$@" |