From d8c63763fdc41ca7a2d8558806e7d270b4bc600e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nagy=20K=C3=A1roly=20G=C3=A1briel?= <k@jpi.io>
Date: Fri, 18 Jan 2019 22:13:06 +0200
Subject: [PATCH] gip: add initial files
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: Nagy Károly Gábriel <k@jpi.io>
---
 .editorconfig |  19 +++++++
 .gitignore    |  27 +++++++++
 Gopkg.lock    |  50 +++++++++++++++++
 Gopkg.toml    |  34 ++++++++++++
 LICENSE       |  21 +++++++
 Makefile      | 150 ++++++++++++++++++++++++++++++++++++++++++++++++++
 README.md     |   3 +
 gip.go        |  68 +++++++++++++++++++++++
 8 files changed, 372 insertions(+)
 create mode 100644 .editorconfig
 create mode 100644 .gitignore
 create mode 100644 Gopkg.lock
 create mode 100644 Gopkg.toml
 create mode 100644 LICENSE
 create mode 100644 Makefile
 create mode 100644 README.md
 create mode 100644 gip.go

diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..fb7bb93
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,19 @@
+# http://editorconfig.org
+
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_size = 4
+indent_style = space
+
+[*.go]
+indent_style = tab
+indent_size = 4
+
+[Makefile]
+indent_style = tab
+
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..555384d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,27 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+*.test
+*.prof
+/.GOPATH
+/bin
+/vendor
diff --git a/Gopkg.lock b/Gopkg.lock
new file mode 100644
index 0000000..3a5e711
--- /dev/null
+++ b/Gopkg.lock
@@ -0,0 +1,50 @@
+# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
+
+
+[[projects]]
+  digest = "1:d64a0aa67f715fd28f5ddfe0d74c06b6d6fe0fed931d77e662f2c4694f6854dc"
+  name = "github.com/miekg/dns"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "56be65265e34e731425e0269a301774938827c60"
+  version = "v1.1.3"
+
+[[projects]]
+  branch = "master"
+  digest = "1:d5891c5bca9c62e5d394ca26491d2b710a1dc08cedeb0ca8f9ac4c3305120b02"
+  name = "golang.org/x/crypto"
+  packages = [
+    "ed25519",
+    "ed25519/internal/edwards25519",
+  ]
+  pruneopts = "UT"
+  revision = "ff983b9c42bc9fbf91556e191cc8efb585c16908"
+
+[[projects]]
+  branch = "master"
+  digest = "1:19beed19e4246df7aff387a2bcd4519a386e3fe9637690031c4d4b0cf75f7215"
+  name = "golang.org/x/net"
+  packages = [
+    "bpf",
+    "internal/iana",
+    "internal/socket",
+    "ipv4",
+    "ipv6",
+  ]
+  pruneopts = "UT"
+  revision = "915654e7eabcea33ae277abbecf52f0d8b7a9fdc"
+
+[[projects]]
+  branch = "master"
+  digest = "1:f6f6d9d6f80c9e32acc0f4f3b904e0b9f5b18a7757c2ef941121bd79a10e7bdf"
+  name = "golang.org/x/sys"
+  packages = ["unix"]
+  pruneopts = "UT"
+  revision = "11f53e03133963fb11ae0588e08b5e0b85be8be5"
+
+[solve-meta]
+  analyzer-name = "dep"
+  analyzer-version = 1
+  input-imports = ["github.com/miekg/dns"]
+  solver-name = "gps-cdcl"
+  solver-version = 1
diff --git a/Gopkg.toml b/Gopkg.toml
new file mode 100644
index 0000000..f5f2bd2
--- /dev/null
+++ b/Gopkg.toml
@@ -0,0 +1,34 @@
+# Gopkg.toml example
+#
+# Refer to https://golang.github.io/dep/docs/Gopkg.toml.html
+# for detailed Gopkg.toml documentation.
+#
+# required = ["github.com/user/thing/cmd/thing"]
+# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
+#
+# [[constraint]]
+#   name = "github.com/user/project"
+#   version = "1.0.0"
+#
+# [[constraint]]
+#   name = "github.com/user/project2"
+#   branch = "dev"
+#   source = "github.com/myfork/project2"
+#
+# [[override]]
+#   name = "github.com/x/y"
+#   version = "2.4.0"
+#
+# [prune]
+#   non-go = false
+#   go-tests = true
+#   unused-packages = true
+
+
+[[constraint]]
+  name = "github.com/miekg/dns"
+  version = "1.1.3"
+
+[prune]
+  go-tests = true
+  unused-packages = true
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..3630990
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2019 Nagy Károly Gábriel
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..33493f6
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,150 @@
+# The import path is where your repository can be found.
+# To import subpackages, always prepend the full import path.
+# If you change this, run `make clean`. Read more: https://git.io/vM7zV
+
+mkfile_path := $(abspath $(lastword $(MAKEFILE_LIST)))
+current_dir := $(notdir $(patsubst %/,%,$(dir $(mkfile_path))))
+
+IMPORT_PATH := git.jpi.io/$(USER)/$(current_dir)
+
+# V := 1 # When V is set, print commands and build progress.
+
+# Space separated patterns of packages to skip in list, test, format.
+IGNORED_PACKAGES := /vendor/
+
+.PHONY: all
+all: build
+
+.PHONY: build
+build: .GOPATH/.ok
+	$Q go install $(if $V,-v) $(VERSION_FLAGS) $(IMPORT_PATH)
+
+### Code not in the repository root? Another binary? Add to the path like this.
+# .PHONY: otherbin
+# otherbin: .GOPATH/.ok
+# 	$Q go install $(if $V,-v) $(VERSION_FLAGS) $(IMPORT_PATH)/cmd/otherbin
+
+##### ^^^^^^ EDIT ABOVE ^^^^^^ #####
+
+##### =====> Utility targets <===== #####
+
+.PHONY: clean test list cover format gen
+
+clean:
+	$Q rm -rf bin .GOPATH
+
+test: .GOPATH/.ok
+	$Q go test $(if $V,-v) -i -race $(allpackages) # install -race libs to speed up next run
+ifndef CI
+	$Q go vet $(allpackages)
+	$Q GODEBUG=cgocheck=2 go test -race $(allpackages)
+else
+	$Q ( go vet $(allpackages); echo $$? ) | \
+	    tee .GOPATH/test/vet.txt | sed '$$ d'; exit $$(tail -1 .GOPATH/test/vet.txt)
+	$Q ( GODEBUG=cgocheck=2 go test -v -race $(allpackages); echo $$? ) | \
+	    tee .GOPATH/test/output.txt | sed '$$ d'; exit $$(tail -1 .GOPATH/test/output.txt)
+endif
+
+list: .GOPATH/.ok
+	@echo $(allpackages)
+
+cover: bin/gocovmerge .GOPATH/.ok
+	@echo "NOTE: make cover does not exit 1 on failure, don't use it to check for tests success!"
+	$Q rm -f .GOPATH/cover/*.out .GOPATH/cover/all.merged
+	$(if $V,@echo "-- go test -coverpkg=./... -coverprofile=.GOPATH/cover/... ./...")
+	@for MOD in $(allpackages); do \
+		go test -coverpkg=`echo $(allpackages)|tr " " ","` \
+			-coverprofile=.GOPATH/cover/unit-`echo $$MOD|tr "/" "_"`.out \
+			$$MOD 2>&1 | grep -v "no packages being tested depend on"; \
+	done
+	$Q ./bin/gocovmerge .GOPATH/cover/*.out > .GOPATH/cover/all.merged
+ifndef CI
+	$Q go tool cover -html .GOPATH/cover/all.merged
+else
+	$Q go tool cover -html .GOPATH/cover/all.merged -o .GOPATH/cover/all.html
+endif
+	@echo ""
+	@echo "=====> Total test coverage: <====="
+	@echo ""
+	$Q go tool cover -func .GOPATH/cover/all.merged
+
+format: bin/goimports .GOPATH/.ok
+	$Q find .GOPATH/src/$(IMPORT_PATH)/ -iname \*.go | grep -v \
+	    -e "^$$" $(addprefix -e ,$(IGNORED_PACKAGES)) | xargs ./bin/goimports -w
+
+gen: .GOPATH/.ok
+	@echo "Running go generate"
+	$Q cd $(CURDIR)/.GOPATH/src/$(IMPORT_PATH) && go generate
+	@echo "Done!"
+
+##### =====> Internals <===== #####
+
+.PHONY: setup
+setup: clean .GOPATH/.ok
+	@if ! grep "/.GOPATH" .gitignore > /dev/null 2>&1; then \
+	    echo "/.GOPATH" >> .gitignore; \
+	    echo "/bin" >> .gitignore; \
+	fi
+	go get -u github.com/golang/dep/cmd/dep
+	- go get -u golang.org/x/tools/cmd/goimports
+	- go get -u github.com/wadey/gocovmerge
+	@test -f Gopkg.toml || \
+	(cd $(CURDIR)/.GOPATH/src/$(IMPORT_PATH) && ./bin/dep init)
+	(cd $(CURDIR)/.GOPATH/src/$(IMPORT_PATH) && ./bin/dep ensure)
+VERSION          := $(shell git describe --tags --always --dirty="-dev")
+DATE             := $(shell date -u '+%Y-%m-%d-%H%M UTC')
+VERSION_FLAGS    := -ldflags='-X "main.Version=$(VERSION)" -X "main.BuildTime=$(DATE)"'
+
+# cd into the GOPATH to workaround ./... not following symlinks
+_allpackages = $(shell ( cd $(CURDIR)/.GOPATH/src/$(IMPORT_PATH) && \
+    GOPATH=$(CURDIR)/.GOPATH go list ./... 2>&1 1>&3 | \
+    grep -v -e "^$$" $(addprefix -e ,$(IGNORED_PACKAGES)) 1>&2 ) 3>&1 | \
+    grep -v -e "^$$" $(addprefix -e ,$(IGNORED_PACKAGES)))
+
+# memoize allpackages, so that it's executed only once and only if used
+allpackages = $(if $(__allpackages),,$(eval __allpackages := $$(_allpackages)))$(__allpackages)
+
+export GOPATH := $(CURDIR)/.GOPATH
+unexport GOBIN
+
+Q := $(if $V,,@)
+
+.GOPATH/.ok:
+	$Q mkdir -p "$(dir .GOPATH/src/$(IMPORT_PATH))"
+	$Q ln -s ../../../.. ".GOPATH/src/$(IMPORT_PATH)"
+	$Q mkdir -p .GOPATH/test .GOPATH/cover
+	$Q mkdir -p bin
+	$Q ln -s ../bin .GOPATH/bin
+	$Q touch $@
+
+.PHONY: bin/gocovmerge bin/goimports
+bin/gocovmerge: .GOPATH/.ok
+	@test -d ./vendor/github.com/wadey/gocovmerge || \
+	    { echo "Vendored gocovmerge not found, try running 'make setup'..."; exit 1; }
+	$Q go install $(IMPORT_PATH)/vendor/github.com/wadey/gocovmerge
+bin/goimports: .GOPATH/.ok
+	@test -d ./vendor/golang.org/x/tools/cmd/goimports || \
+	    { echo "Vendored goimports not found, try running 'make setup'..."; exit 1; }
+	$Q go install $(IMPORT_PATH)/vendor/golang.org/x/tools/cmd/goimports
+
+# Based on https://github.com/cloudflare/hellogopher - v1.1 - MIT License
+#
+# Copyright (c) 2017 Cloudflare
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..9d7c524
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# gip
+
+Find your public IP
diff --git a/gip.go b/gip.go
new file mode 100644
index 0000000..787fc50
--- /dev/null
+++ b/gip.go
@@ -0,0 +1,68 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/miekg/dns"
+)
+
+/*
+dig {-4,-6} +short myip.opendns.com @resolver1.opendns.com
+dig {-4,-6} TXT +short o-o.myaddr.l.google.com @ns1.google.com
+*/
+
+func get4(c *dns.Client, m *dns.Msg, nameserver string) (*dns.Msg, error) {
+	c.Net = "udp4"
+	m.SetQuestion("myip.opendns.com.", dns.TypeA)
+
+	r, _, err := c.Exchange(m, nameserver)
+	return r, err
+}
+
+func get6(c *dns.Client, m *dns.Msg, nameserver string) (*dns.Msg, error) {
+	c.Net = "udp6"
+	m.SetQuestion("myip.opendns.com.", dns.TypeAAAA)
+
+	r, _, err := c.Exchange(m, nameserver)
+	return r, err
+
+}
+
+func printIP(ra []dns.RR) []string {
+	var ips []string
+	for _, ansa := range ra {
+		switch ansb := ansa.(type) {
+		case *dns.A:
+			ips = append(ips, ansb.A.String())
+		case *dns.AAAA:
+			ips = append(ips, ansb.AAAA.String())
+		}
+	}
+	return ips
+}
+
+func main() {
+	nameserver := dns.Fqdn("resolver1.opendns.com") + ":53"
+
+	c := new(dns.Client)
+	c.Net = "udp4"
+	m := &dns.Msg{
+		MsgHdr: dns.MsgHdr{
+			RecursionDesired: true,
+		},
+		Question: make([]dns.Question, 1),
+	}
+	r4, err := get4(c, m, nameserver)
+	if err != nil {
+		fmt.Println(err)
+	} else {
+		fmt.Println(printIP(r4.Answer))
+	}
+	r6, e6 := get6(c, m, nameserver)
+	if err != nil {
+		fmt.Println(e6)
+	} else {
+		fmt.Println(printIP(r6.Answer))
+	}
+
+}