minor fixes (#6)

* small changes

[^] README.md | fixed typo, added error to examples
[^] gomap_test.go | changed to panic()
[^] gomap_syn_scan.go | removed redundant struct names
[^] gomap_ports.go | changed vnc from 5550 to 5900, added tor, dnp, skype, RDP and mongoDB
[^] gomap_funcs.go | removed punctuation because errors should not end with punctuation or a newline

* added a few common ports

README.md

@@ -12,7 +12,7 @@ Gomap is a fully self-contained nmap like module for Golang. Unlike other projec
 ## Features
   - Parallel port scanning using go routines
   - Automated CIDR range scanning
-  - Service perdiction by port number
+  - Service prediction by port number
   - SYN (Silent) Scanning Mode
   - UDP Scanning (Non-Stealth)
   - Fast and detailed scanning for common ports
@@ -31,20 +31,23 @@ Performs a fastscan for the most common ports on every IP on a local range
 package main
 
 import (
-        "fmt"
+	"fmt"
 
-        "github.com/JustinTimperio/gomap"
+	"github.com/JustinTimperio/gomap"
 )
 
 func main() {
-        var (
-                proto    = "tcp"
-                fastscan = true
-                syn      = false
-        )
-
-        scan := gomap.ScanRange(proto, fastscan, syn)
-        fmt.Printf(scan.String())
+	var (
+		proto    = "tcp"
+		fastscan = true
+		syn      = false
+	)
+
+	scan, err := gomap.ScanRange(proto, fastscan, syn)
+	if err != nil {
+		// handle error
+	}
+	fmt.Printf(scan.String())
 }
 ```
  2. `go mod init quickscan`
@@ -84,22 +87,25 @@ Performs a detailed stealth scan on a single IP
 package main
 
 import (
-        "fmt"
+	"fmt"
 
-        "github.com/JustinTimperio/gomap"
+	"github.com/JustinTimperio/gomap"
 )
 
 func main() {
-        // Stealth scans MUST be run as root/admin
-        var (
-                fastscan = false
-                syn      = true
-                proto    = "tcp"
-                ip       = "192.168.1.120"
-        )
-
-        scan := gomap.ScanIP(ip, proto, fastscan, syn)
-        fmt.Printf(scan.String())
+	// Stealth scans MUST be run as root/admin
+	var (
+		fastscan = false
+		syn      = true
+		proto    = "tcp"
+		ip       = "192.168.1.120"
+	)
+
+	scan, err := gomap.ScanIP(ip, proto, fastscan, syn)
+	if err != nil {
+		// handle error
+	}
+	fmt.Printf(scan.String())
 }
 ```
  2. `go mod init stealthmap`

gomap_funcs.go

@@ -77,5 +77,5 @@ func getLocalIP() (string, error) {
 			}
 		}
 	}
-	return "", fmt.Errorf("No IP Found!")
+	return "", fmt.Errorf("No IP Found")
 }

gomap_ports.go

@@ -8,20 +8,27 @@ var commonlist = map[int]string{
 	23:    "telnet",
 	25:    "smtp",
 	43:    "whois",
+	50:    "IPSec",
+	51:    "IPSec",
 	53:    "dns",
 	67:    "dhcp",
 	68:    "dhcp",
+	69:    "TFTP",
 	80:    "http",
 	88:    "kerberos",
 	110:   "pop3",
 	111:   "rpc",
 	115:   "sftp",
+	119:   "nntp",
 	123:   "ntp",
 	137:   "netbios",
 	138:   "netbios",
 	139:   "netbios",
 	143:   "imap4",
 	156:   "sql server",
+	161:   "SNMP",
+	162:   "SNMP",
+	389:   "LDAP",
 	443:   "https",
 	513:   "rlogin",
 	540:   "uucp",
@@ -41,15 +48,31 @@ var commonlist = map[int]string{
 	2082:  "cpanel",
 	2083:  "cpanel",
 	3306:  "mysql",
+	3389:  "RDP",
 	5000:  "unpn",
 	5432:  "psql",
-	5550:  "vnc server",
+	5500:  "vnc server",
+	5900:  "vnc server",
 	5938:  "teamviewer",
 	8000:  "http-alt",
 	8080:  "https-proxy",
+	8333:  "VMware Web Access",
 	8443:  "https-alt",
+	8998:  "I2P",
+	9030:  "Tor",
+	9050:  "Tor",
+	9051:  "Tor",
+	9150:  "Tor Browser",
 	9200:  "elasticsearch",
+	9418:  "git",
+	9987:  "Teamspeak 3 voice",
+	19999: "DNP",
+	23399: "Skype",
 	25565: "minecraft",
+	27017: "MongoDB",
+	28015: "Rust (Video Game)",
+	43594: "runescape",
+	43595: "runescape",
 }
 
 var detailedlist = map[int]string{

gomap_syn_scan.go

@@ -12,12 +12,12 @@ import (
 func sendSyn(laddr string, raddr string, sport uint16, dport uint16) error {
 	// Create TCP packet struct and header
 	op := []tcpOption{
-		tcpOption{
+		{
 			Kind:   2,
 			Length: 4,
 			Data:   []byte{0x05, 0xb4},
 		},
-		tcpOption{
+		{
 			Kind: 0,
 		},
 	}

gomap_test.go

@@ -18,8 +18,7 @@ func TestMain(m *testing.M) {
 	results, err := gomap.ScanRange(proto, fastscan, stealth)
 
 	if err != nil {
-		fmt.Println(err)
-	} else {
-		fmt.Println(results)
+		panic(err)
 	}
+	fmt.Println(results.String())
 }