/
main.go
67 lines (56 loc) · 1.64 KB
/
main.go
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package main
import (
"log"
"net"
"os"
"strconv"
"strings"
"github.com/brave/viproxy"
"github.com/mdlayher/vsock"
)
func parseAddr(rawAddr string) net.Addr {
var addr net.Addr
var err error
addr, err = net.ResolveTCPAddr("tcp", rawAddr)
if err == nil {
return addr
}
// We couldn't parse the address, so we must be dealing with AF_VSOCK. We
// expect an address like 3:8080.
fields := strings.Split(rawAddr, ":")
if len(fields) != 2 {
log.Fatal("Looks like we're given neither AF_INET nor AF_VSOCK addr.")
}
cid, err := strconv.ParseInt(fields[0], 10, 32)
if err != nil {
log.Fatal("Couldn't turn CID into integer.")
}
port, err := strconv.ParseInt(fields[1], 10, 32)
if err != nil {
log.Fatal("Couldn't turn port into integer.")
}
addr = &vsock.Addr{ContextID: uint32(cid), Port: uint32(port)}
return addr
}
func main() {
// E.g.: IN_ADDRS=127.0.0.1:8080,127.0.0.1:8081 OUT_ADDRS=4:8080,4:8081 go run main.go
inEnv, outEnv := os.Getenv("IN_ADDRS"), os.Getenv("OUT_ADDRS")
if inEnv == "" || outEnv == "" {
log.Fatal("Environment variables IN_ADDRS and OUT_ADDRS not set.")
}
rawInAddrs, rawOutAddrs := strings.Split(inEnv, ","), strings.Split(outEnv, ",")
if len(rawInAddrs) != len(rawOutAddrs) {
log.Fatal("IN_ADDRS and OUT_ADDRS must contain same number of addresses.")
}
var tuples []*viproxy.Tuple
for i := range rawInAddrs {
inAddr := parseAddr(rawInAddrs[i])
outAddr := parseAddr(rawOutAddrs[i])
tuples = append(tuples, &viproxy.Tuple{InAddr: inAddr, OutAddr: outAddr})
}
p := viproxy.NewVIProxy(tuples)
if err := p.Start(); err != nil {
log.Fatalf("Failed to start VIProxy: %s", err)
}
<-make(chan bool)
}