Implements network scanner in pure go (no reliance on nmap)

CONTRIBUTING.md

@@ -8,12 +8,12 @@
 
 - mac
 ```bash
-brew install make go nmap ansible git
+brew install make go ansible git
 ```
 
 - debian
 ```bash
-sudo apt update && sudo apt install -y make golang nmap ansible git
+sudo apt update && sudo apt install -y make golang ansible git
 ```
 
 When building from source you may want to add the following lines to one of your

README.md

@@ -13,16 +13,16 @@ managing kubernetes clusters via a terminal ui application.
 
 ## Runtime Dependencies
 
-Ops has two external runtime dependencies, namely [nmap] and [ansible].
+Ops has one external runtime dependencies, [ansible].
 
 - mac
 ```bash
-brew install nmap ansible
+brew install ansible
 ```
 
 - debian
 ```bash
-sudo apt update && sudo apt install -y nmap ansible
+sudo apt update && sudo apt install -y ansible
 ```
 
 ## Build Dependencies
@@ -54,7 +54,6 @@ PATH="${GOPATH}/bin:$PATH"
   - dependencies
     - golang
     - ansible
-    - nmap
     - git
 
 ```bash
@@ -66,7 +65,6 @@ go install github.com/robgonnella/ops@latest
     - golang
     - make
     - ansible
-    - nmap
     - git
 
 ```bash
@@ -77,7 +75,6 @@ make install
 
 - use pre-built binaries: https://github.com/robgonnella/ops/releases
   - dependencies
-    - nmap
     - ansible
 
 ## Usage
@@ -129,14 +126,11 @@ ops <cmd> --help
 
 - [tview] is used to build the frontend. This is a wonderful open source
   terminal ui library provided by [rivo]!
-- [nmap] is used on the backend to perform arp scanning of networks to find
-  and track devices.
 - [ansible] is also used on the backend to gather additional details about a
   device where ssh is granted
 
 [rivo]: https://github.com/rivo
 [tview]: https://github.com/rivo/tview
 [ansible]: https://docs.ansible.com/
-[nmap]: https://nmap.org/
 [k9s]: https://github.com/derailed/k9s
 [derailed]: https://github.com/derailed

go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/gdamore/tcell/v2 v2.6.0
 	github.com/golang/mock v1.6.0
 	github.com/imdario/mergo v0.3.16
+	github.com/projectdiscovery/mapcidr v1.1.2
 	github.com/rivo/tview v0.0.0-20230621164836-6cc0565babaf
 	github.com/rs/zerolog v1.29.1
 	github.com/spf13/cobra v1.7.0
@@ -21,31 +22,39 @@ require (
 require (
 	github.com/apenella/go-common-utils/data v0.0.0-20210528133155-34ba915e28c8 // indirect
 	github.com/apenella/go-common-utils/error v0.0.0-20210528133155-34ba915e28c8 // indirect
+	github.com/aymerick/douceur v0.2.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/fatih/color v1.13.0 // indirect
+	github.com/fatih/color v1.14.1 // indirect
 	github.com/fsnotify/fsnotify v1.6.0 // indirect
 	github.com/gdamore/encoding v1.0.0 // indirect
 	github.com/go-sql-driver/mysql v1.7.0 // indirect
+	github.com/gorilla/css v1.0.0 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/jinzhu/inflection v1.0.0 // indirect
 	github.com/jinzhu/now v1.1.5 // indirect
 	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
 	github.com/magiconair/properties v1.8.7 // indirect
-	github.com/mattn/go-colorable v0.1.12 // indirect
-	github.com/mattn/go-isatty v0.0.14 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.17 // indirect
 	github.com/mattn/go-runewidth v0.0.14 // indirect
 	github.com/mattn/go-sqlite3 v1.14.17 // indirect
+	github.com/microcosm-cc/bluemonday v1.0.23 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/pelletier/go-toml/v2 v2.0.8 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/projectdiscovery/blackrock v0.0.1 // indirect
+	github.com/projectdiscovery/utils v0.0.32 // indirect
 	github.com/rivo/uniseg v0.4.4 // indirect
+	github.com/saintfish/chardet v0.0.0-20230101081208-5e3ef4b5456d // indirect
 	github.com/spf13/afero v1.9.5 // indirect
 	github.com/spf13/cast v1.5.1 // indirect
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/stretchr/objx v0.5.0 // indirect
 	github.com/subosito/gotenv v1.4.2 // indirect
+	golang.org/x/net v0.10.0 // indirect
 	golang.org/x/sync v0.1.0 // indirect
 	golang.org/x/sys v0.9.0 // indirect
 	golang.org/x/term v0.9.0 // indirect

go.sum

@@ -53,6 +53,8 @@ github.com/apenella/go-common-utils/error v0.0.0-20210528133155-34ba915e28c8/go.
 github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
 github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
 github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
+github.com/aymerick/douceur v0.2.0 h1:Mv+mAeH1Q+n9Fr+oyamOlAkUNPWPlA8PPGR0QAaYuPk=
+github.com/aymerick/douceur v0.2.0/go.mod h1:wlT5vV2O3h55X9m7iVYN0TBM0NH/MmbLnd30/FjWUq4=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
@@ -87,8 +89,9 @@ github.com/envoyproxy/go-control-plane v0.9.7/go.mod h1:cwu0lG7PUMfa9snN8LXBig5y
 github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
-github.com/fatih/color v1.13.0 h1:8LOYc1KYPPmyKMuN8QV2DNRWNbLo6LZ0iLs8+mlH53w=
 github.com/fatih/color v1.13.0/go.mod h1:kLAiJbzzSOZDVNGyDpeOxJ47H46qBXwg5ILebYFFOfk=
+github.com/fatih/color v1.14.1 h1:qfhVLaG5s+nCROl1zJsZRxFeYrHLqWroPOQ8BWiNb4w=
+github.com/fatih/color v1.14.1/go.mod h1:2oHN61fhTpgcxD3TSWCgKDiH1+x4OiDVVGH8WlgGZGg=
 github.com/frankban/quicktest v1.14.4 h1:g2rn0vABPOOXmZUj+vbmUp0lPoXEMuhTpIluN0XL9UY=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/fsnotify/fsnotify v1.6.0 h1:n+5WquG0fcWoWp6xPWfHdbskMCQaFnG6PfBrh1Ky4HY=
@@ -171,6 +174,8 @@ github.com/googleapis/gax-go/v2 v2.0.4/go.mod h1:0Wqv26UfaUD9n4G6kQubkQ+KchISgw+
 github.com/googleapis/gax-go/v2 v2.0.5/go.mod h1:DWXyrwAJ9X0FpwwEdw+IPEYBICEFu5mhpdKc/us6bOk=
 github.com/googleapis/google-cloud-go-testing v0.0.0-20200911160855-bcd43fbb19e8/go.mod h1:dvDLG8qkwmyD9a/MJJN3XJcT3xFxOKAvTZGvuZmac9g=
 github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
+github.com/gorilla/css v1.0.0 h1:BQqNyPTi50JCFMTw/b67hByjMVXZRwGha6wxVGkeihY=
+github.com/gorilla/css v1.0.0/go.mod h1:Dn721qIggHpt4+EFCcTLTU/vk5ySda2ReITrtgBl60c=
 github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/grpc-ecosystem/go-grpc-middleware v1.0.0/go.mod h1:FiyG127CGDf3tlThmgyCl78X/SZQqEOJBCDaAfeWzPs=
 github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgfV/d3M/q6VIi02HzZEHgUlZvzk=
@@ -236,17 +241,22 @@ github.com/magiconair/properties v1.8.7 h1:IeQXZAiQcpL9mgcAe1Nu6cX9LLw6ExEHKjN0V
 github.com/magiconair/properties v1.8.7/go.mod h1:Dhd985XPs7jluiymwWYZ0G4Z61jb3vdS329zhj2hYo0=
 github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
 github.com/mattn/go-colorable v0.1.9/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
-github.com/mattn/go-colorable v0.1.12 h1:jF+Du6AlPIjs2BiUiQlKOX0rt3SujHxPnksPKZbaA40=
 github.com/mattn/go-colorable v0.1.12/go.mod h1:u5H1YNBxpqRaxsYJYSkiCWKzEfiAb1Gb520KVy5xxl4=
+github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
+github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
 github.com/mattn/go-isatty v0.0.3/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNxMWT7Zi4=
 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
-github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9Y=
 github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
+github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
+github.com/mattn/go-isatty v0.0.17 h1:BTarxUcIeDqL27Mc+vyvdWYSL28zpIhv3RoTdsLMPng=
+github.com/mattn/go-isatty v0.0.17/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
 github.com/mattn/go-runewidth v0.0.14 h1:+xnbZSEeDbOIg5/mE6JF0w6n9duR1l3/WmbinWVwUuU=
 github.com/mattn/go-runewidth v0.0.14/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/mattn/go-sqlite3 v1.14.17 h1:mCRHCLDUBXgpKAqIKsaAaAsrAlbkeomtRFKXh2L6YIM=
 github.com/mattn/go-sqlite3 v1.14.17/go.mod h1:2eHXhiwb8IkHr+BDWZGa96P6+rkvnG63S2DGjv9HUNg=
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
+github.com/microcosm-cc/bluemonday v1.0.23 h1:SMZe2IGa0NuHvnVNAZ+6B38gsTbi5e4sViiWJyDDqFY=
+github.com/microcosm-cc/bluemonday v1.0.23/go.mod h1:mN70sk7UkkF8TUr2IGBpNN0jAgStuPzlK76QuruE/z4=
 github.com/microsoft/go-mssqldb v0.17.0 h1:Fto83dMZPnYv1Zwx5vHHxpNraeEaUlQ/hhHLgZiaenE=
 github.com/miekg/dns v1.0.14/go.mod h1:W1PPwlIAgtquWBMBEV9nkV9Cazfe8ScdGz/Lj7v3Nrg=
 github.com/mitchellh/cli v1.0.0/go.mod h1:hNIlj7HEI86fIcpObd7a0FcrxTWetlwJDGcceTlRvqc=
@@ -269,11 +279,18 @@ github.com/pelletier/go-toml/v2 v2.0.8 h1:0ctb6s9mE31h0/lhu+J6OPmVeDxJn+kYnJc2jZ
 github.com/pelletier/go-toml/v2 v2.0.8/go.mod h1:vuYfssBdrU2XDZ9bYydBu6t+6a6PYNcZljzZR9VXg+4=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/sftp v1.13.1/go.mod h1:3HaPG6Dq1ILlpPZRO0HVMrsydcdLt6HRDccSgb87qRg=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/posener/complete v1.1.1/go.mod h1:em0nMJCgc9GFtwrmVmEMR/ZL6WyhyjMBndrE9hABlRI=
+github.com/projectdiscovery/blackrock v0.0.1 h1:lHQqhaaEFjgf5WkuItbpeCZv2DUIE45k0VbGJyft6LQ=
+github.com/projectdiscovery/blackrock v0.0.1/go.mod h1:ANUtjDfaVrqB453bzToU+YB4cUbvBRpLvEwoWIwlTss=
+github.com/projectdiscovery/mapcidr v1.1.2 h1:Mmq/nPqvVc7fjvH/kJVK0IBOny/LrJIxZ4tQsLPCrsA=
+github.com/projectdiscovery/mapcidr v1.1.2/go.mod h1:Aoq0x/wJl6KDbtQ8OcPkjIDCqx2iEyx5ty1nzso8wXM=
+github.com/projectdiscovery/utils v0.0.32 h1:TjUxFmRG9hiV6jauYsnIRiy08lTgGHGi8avstedNGXw=
+github.com/projectdiscovery/utils v0.0.32/go.mod h1:SaOpcZ2dJ47NE3t4R/YC2XpUyRZC6v5k8sj2TFro6+k=
 github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
 github.com/prometheus/client_golang v0.9.3/go.mod h1:/TN21ttK/J9q6uSwhBd54HahCDft0ttaMvbicHlPoso=
 github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
@@ -299,6 +316,8 @@ github.com/rs/zerolog v1.29.1/go.mod h1:Le6ESbR7hc+DP6Lt1THiV8CQSdkkNrd3R0XbEgp3
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/ryanuber/columnize v0.0.0-20160712163229-9b3edd62028f/go.mod h1:sm1tb6uqfes/u+d4ooFouqFdy9/2g9QGwK3SQygK0Ts=
+github.com/saintfish/chardet v0.0.0-20230101081208-5e3ef4b5456d h1:hrujxIzL1woJ7AwssoOcM/tq5JjjG2yYOc8odClEiXA=
+github.com/saintfish/chardet v0.0.0-20230101081208-5e3ef4b5456d/go.mod h1:uugorj2VCxiV1x+LzaIdVa9b4S4qGAcH6cbhh4qVxOU=
 github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529/go.mod h1:DxrIzT+xaE7yg65j358z/aeFdxmN0P9QXhEzd20vsDc=
 github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
 github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
@@ -444,6 +463,8 @@ golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/net v0.10.0 h1:X2//UzNDwYmtCLn7To6G58Wr6f5ahEAQgKNzv9Y951M=
+golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -514,6 +535,7 @@ golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220908164124-27713097b956/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.9.0 h1:KS/R3tvhPqvJvwcKfnBHJwwthS11LRhmM5D59eEXa0s=

internal/app-info/info.go

@@ -5,4 +5,4 @@ package app_info
 const NAME = "ops"
 
 // VERSION app version
-const VERSION = "v0.1.5"
+const VERSION = "v0.2.0"

internal/discovery/net.go

@@ -0,0 +1,117 @@
+package discovery
+
+import (
+	"crypto/sha1"
+	"encoding/hex"
+	"errors"
+	"net"
+	"regexp"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/projectdiscovery/mapcidr"
+	"github.com/robgonnella/ops/internal/logger"
+	"github.com/robgonnella/ops/internal/server"
+)
+
+var cidrSuffix = regexp.MustCompile(`\/\d{2}$`)
+
+type NetScanner struct {
+	canceled  bool
+	targets   []string
+	semaphore chan struct{}
+	log       logger.Logger
+}
+
+func NewNetScanner(targets []string) *NetScanner {
+	return &NetScanner{
+		canceled:  false,
+		targets:   targets,
+		semaphore: make(chan struct{}, 1000),
+		log:       logger.New(),
+	}
+}
+
+func (s *NetScanner) Scan() ([]*DiscoveryResult, error) {
+	if s.canceled {
+		return nil, errors.New("network scanner is in a canceled state")
+	}
+
+	s.log.Info().Msg("Scanning network...")
+
+	results := []*DiscoveryResult{}
+
+	ipList := []string{}
+
+	wg := &sync.WaitGroup{}
+
+	for _, t := range s.targets {
+		if cidrSuffix.MatchString(t) {
+			ips, err := mapcidr.IPAddresses(t)
+
+			if err != nil {
+				return nil, err
+			}
+
+			ipList = append(ipList, ips...)
+		} else {
+			ipList = append(ipList, t)
+		}
+	}
+
+	for _, ip := range ipList {
+		s.semaphore <- struct{}{} // acquire
+		wg.Add(1)
+		go func(i string, w *sync.WaitGroup, res []*DiscoveryResult) {
+			r := s.scanIP(i)
+			results = append(results, r)
+			<-s.semaphore // release
+			w.Done()
+		}(ip, wg, results)
+	}
+
+	wg.Wait()
+
+	return results, nil
+}
+
+func (s *NetScanner) Stop() {
+	s.canceled = true
+}
+
+func (s *NetScanner) scanIP(ip string) *DiscoveryResult {
+	hashedIP := sha1.Sum([]byte(ip))
+	id := hex.EncodeToString(hashedIP[:])
+
+	r := DiscoveryResult{
+		ID:       id,
+		Hostname: "",
+		IP:       ip,
+		OS:       "",
+		Status:   server.StatusOffline,
+	}
+
+	s.log.Info().Str("ip", ip).Msg("Scanning target")
+
+	timeOut := time.Millisecond * 200
+	conn, err := net.DialTimeout("tcp", ip+":22", timeOut)
+
+	if err != nil {
+		r.Ports = []Port{{ID: 22, Status: PortClosed}}
+
+		s.log.Error().Err(err).Msg("network scanning error")
+
+		if _, ok := err.(*net.OpError); ok {
+			if strings.HasSuffix(err.Error(), "connect: connection refused") {
+				r.Status = server.StatusOnline
+			}
+		}
+	} else {
+		defer conn.Close()
+		r.Status = server.StatusOnline
+		r.Ports = []Port{{ID: 22, Status: PortOpen}}
+	}
+
+	return &r
+}