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req.go
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req.go
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package cmd
import (
"fmt"
"net"
"time"
"github.com/greenstatic/openspa/internal"
lib "github.com/greenstatic/openspa/pkg/openspalib"
"github.com/rs/zerolog/log"
"github.com/spf13/cobra"
)
var ReqCmd = &cobra.Command{
Use: "req <OSPA file>",
Short: "Send an OpenSPA request packet",
Run: reqCmdRunFn,
PreRun: PreRunLogSetupFn,
}
func ReqCmdSetup(c *cobra.Command) {
c.Flags().Bool("auto-mode", false,
"Automatically send request packet when the duration from the previous request is nearing 50% before termination")
c.Flags().IP("client-ip", nil,
"Client IP (v4 or v6) that will be requested for access to target (if empty, will be resolved)")
c.Flags().String("target-protocol", lib.ProtocolTCP.Protocol,
fmt.Sprintf("Target protocol you wish to access (%s)", internetProtocolSupportedHelpString()))
c.Flags().IPP("target-ip", "t", nil,
"Target IP (v4 or v6) that you wish to access (if empty, will use server's IP)")
c.Flags().Uint16P("target-port-start", "p", 22,
"Target (start) port that you wish to access")
c.Flags().Uint16("target-port-end", 0,
"Along with --target-port-start range of target ports that you wish to access")
c.Flags().Uint("retry-count", 3, "")
c.Flags().Uint("timeout", 3, "Timeout to wait for response in seconds")
c.Flags().String("ipv4-resolver-server", internal.IPv4ServerDefault,
"The server to use to resolve client's public IPv4 address (needs to be a URL)")
c.Flags().String("ipv6-resolver-server", internal.IPv6ServerDefault,
"The server to use to resolve client's public IPv6 address (needs to be a URL)")
}
func reqCmdRunFn(cmd *cobra.Command, args []string) {
if len(args) < 1 {
log.Fatal().Msg("Missing OSPA filepath argument")
}
ospaFilePath := args[0]
reqHandle(cmd, ospaFilePath)
}
func reqHandle(cmd *cobra.Command, ospaFilePath string) {
ospa, err := internal.OSPAFromFile(ospaFilePath)
if err != nil {
log.Fatal().Msgf("Failed to read OSPA file error: %s", err.Error())
}
log.Info().Msgf("Resolving server host: %s", ospa.ServerHost)
serverIPAddr, err := net.ResolveIPAddr("ip", ospa.ServerHost)
if err != nil {
log.Fatal().Err(err).Msgf("Failed to resolve server host: %s", ospa.ServerHost)
}
if serverIPAddr == nil || serverIPAddr.IP == nil {
log.Fatal().Msgf("Server host: %s resolved with no IP", ospa.ServerHost)
}
serverIP := serverIPAddr.IP
autoMode, err := cmd.Flags().GetBool("auto-mode")
fatalOnErr(err, "auto-mode")
tProto, err := cmd.Flags().GetString("target-protocol")
fatalOnErr(err, "target-protocol")
tProtocol, err := lib.InternetProtocolFromString(tProto)
fatalOnErr(err, "Invalid internet protocol (ICMP,IPv4,TCP,UDP,ICMPv6")
tIP, err := cmd.Flags().GetIP("target-ip")
if err != nil {
log.Info().Msgf("Target IP defaulting to server's IP: %s", serverIP)
tIP = serverIP
}
tPortStart, err := cmd.Flags().GetUint16("target-port-start")
fatalOnErr(err, "target-port-start")
tPortEnd, err := cmd.Flags().GetUint16("target-port-end")
fatalOnErr(err, "target-port-end")
if tPortEnd == 0 {
tPortEnd = tPortStart
}
clientIP, err := cmd.Flags().GetIP("client-ip")
if err != nil {
log.Info().Msgf("Client's IP will be determined by the use of public resolver")
ip4, err := cmd.Flags().GetString("ipv4-resolver-server")
if err != nil {
log.Fatal().Err(err).Msgf("ipv4-resolver-server flag failed to get")
}
ip6, err := cmd.Flags().GetString("ipv6-resolver-server")
if err != nil {
log.Fatal().Err(err).Msgf("ipv6-resolver-server flag failed to get")
}
ip, err := internal.ResolveClientsIPAndVersionBasedOnTargetIP(ip4, ip6, tIP)
if err != nil {
log.Fatal().Err(err).Msgf("Failed to resolve client's IP")
}
log.Info().Msgf("Resolved client's IP: %s", ip.String())
clientIP = ip
}
retryCount, err := cmd.Flags().GetUint("retry-count")
fatalOnErr(err, "retryCount")
timeoutSec, err := cmd.Flags().GetUint("timeout")
fatalOnErr(err, "timeout")
reqRoutineParam := internal.RequestRoutineParameters{
ReqParams: internal.RequestRoutineReqParameters{
ClientUUID: ospa.ClientUUID,
ServerIP: serverIP,
ServerPort: ospa.ServerPort,
TargetProto: tProtocol,
ClientIP: clientIP,
TargetIP: tIP,
TargetPortStart: int(tPortStart),
TargetPortEnd: int(tPortEnd),
},
AutoMode: autoMode,
RetryCount: int(retryCount),
Timeout: time.Duration(timeoutSec) * time.Second,
ADKSecret: ospa.ADK.Secret,
}
cs, err := internal.SetupClientCipherSuite(ospa)
if err != nil {
log.Error().Err(err).Msgf("Failed to setup client cipher suite")
}
err = internal.RequestRoutine(reqRoutineParam, cs, internal.RequestRoutineOptDefault)
if err != nil {
log.Error().Err(err).Msgf("Request routine failed")
}
}
func fatalOnErr(err error, str string) {
if err != nil {
log.Fatal().Msgf("%s error: %s", str, err.Error())
}
}
func internetProtocolSupportedHelpString() string {
proto := ""
for i, p := range lib.InternetProtocolNumberSupported() {
l := len(lib.InternetProtocolNumberSupported())
proto += p.Protocol
if i != l-1 {
proto += ","
}
}
return proto
}