140 lines
4.4 KiB
Go
140 lines
4.4 KiB
Go
// Package tor035 implements process interfaces for statically linked
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// Tor 0.3.5.x versions. See the process/embedded package for the generic
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// abstraction
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package tor035
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import (
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"context"
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"fmt"
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"net"
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"os"
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"git.openprivacy.ca/openprivacy/bine/process"
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)
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/*
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#cgo CFLAGS: -I${SRCDIR}/../../../../tor-static/tor/src/feature/api
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// The libs below are generated via tor-static's show-libs
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#cgo LDFLAGS: -L${SRCDIR}/../../../../tor-static/tor/src/core -ltor-app
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#cgo LDFLAGS: -L${SRCDIR}/../../../../tor-static/tor/src/lib -ltor-compress -ltor-evloop -ltor-tls -ltor-crypt-ops -lcurve25519_donna -ltor-geoip -ltor-process -ltor-time -ltor-fs -ltor-encoding -ltor-sandbox -ltor-container -ltor-net -ltor-thread -ltor-memarea -ltor-math -ltor-meminfo -ltor-osinfo -ltor-log -ltor-lock -ltor-fdio -ltor-string -ltor-term -ltor-smartlist-core -ltor-malloc -ltor-wallclock -ltor-err -ltor-intmath -ltor-ctime -ltor-trace
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#cgo LDFLAGS: -L${SRCDIR}/../../../../tor-static/tor/src/ext/keccak-tiny -lkeccak-tiny
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#cgo LDFLAGS: -L${SRCDIR}/../../../../tor-static/tor/src/ext/ed25519/ref10 -led25519_ref10
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#cgo LDFLAGS: -L${SRCDIR}/../../../../tor-static/tor/src/ext/ed25519/donna -led25519_donna
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#cgo LDFLAGS: -L${SRCDIR}/../../../../tor-static/tor/src/trunnel -lor-trunnel
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#cgo LDFLAGS: -L${SRCDIR}/../../../../tor-static/libevent/dist/lib -levent
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#cgo LDFLAGS: -L${SRCDIR}/../../../../tor-static/xz/dist/lib -llzma
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#cgo LDFLAGS: -L${SRCDIR}/../../../../tor-static/zlib/dist/lib -lz
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#cgo LDFLAGS: -L${SRCDIR}/../../../../tor-static/openssl/dist/lib -lssl -lcrypto
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#cgo windows LDFLAGS: -lws2_32 -lcrypt32 -lgdi32 -liphlpapi -Wl,-Bstatic -lpthread
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#cgo !windows LDFLAGS: -lm
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#include <stdlib.h>
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#ifdef _WIN32
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#include <winsock2.h>
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#endif
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#include <tor_api.h>
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// Ref: https://stackoverflow.com/questions/45997786/passing-array-of-string-as-parameter-from-go-to-c-function
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static char** makeCharArray(int size) {
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return calloc(sizeof(char*), size);
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}
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static void setArrayString(char **a, char *s, int n) {
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a[n] = s;
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}
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static void freeCharArray(char **a, int size) {
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int i;
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for (i = 0; i < size; i++)
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free(a[i]);
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free(a);
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}
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*/
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import "C"
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type embeddedCreator struct{}
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// ProviderVersion returns the Tor provider name and version exposed from the
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// Tor embedded API.
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func ProviderVersion() string {
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return C.GoString(C.tor_api_get_provider_version())
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}
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// NewCreator creates a process.Creator for statically-linked Tor embedded in
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// the binary.
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func NewCreator() process.Creator {
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return embeddedCreator{}
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}
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type embeddedProcess struct {
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ctx context.Context
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mainConf *C.struct_tor_main_configuration_t
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args []string
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doneCh chan int
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}
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// New implements process.Creator.New
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func (embeddedCreator) New(ctx context.Context, args ...string) (process.Process, error) {
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return &embeddedProcess{
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ctx: ctx,
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// TODO: mem leak if they never call Start; consider adding a Close()
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mainConf: C.tor_main_configuration_new(),
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args: args,
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}, nil
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}
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func (e *embeddedProcess) Start() error {
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if e.doneCh != nil {
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return fmt.Errorf("Already started")
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}
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// Create the char array for the args
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args := append([]string{"tor"}, e.args...)
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charArray := C.makeCharArray(C.int(len(args)))
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for i, a := range args {
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C.setArrayString(charArray, C.CString(a), C.int(i))
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}
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// Build the conf
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if code := C.tor_main_configuration_set_command_line(e.mainConf, C.int(len(args)), charArray); code != 0 {
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C.tor_main_configuration_free(e.mainConf)
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C.freeCharArray(charArray, C.int(len(args)))
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return fmt.Errorf("Failed to set command line args, code: %v", int(code))
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}
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// Run it async
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e.doneCh = make(chan int, 1)
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go func() {
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defer C.freeCharArray(charArray, C.int(len(args)))
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defer C.tor_main_configuration_free(e.mainConf)
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e.doneCh <- int(C.tor_run_main(e.mainConf))
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}()
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return nil
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}
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func (e *embeddedProcess) Wait() error {
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if e.doneCh == nil {
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return fmt.Errorf("Not started")
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}
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ctx := e.ctx
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if ctx == nil {
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ctx = context.Background()
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}
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select {
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case <-ctx.Done():
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return ctx.Err()
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case code := <-e.doneCh:
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if code == 0 {
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return nil
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}
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return fmt.Errorf("Command completed with error exit code: %v", code)
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}
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}
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func (e *embeddedProcess) EmbeddedControlConn() (net.Conn, error) {
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file := os.NewFile(uintptr(C.tor_main_configuration_setup_control_socket(e.mainConf)), "")
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conn, err := net.FileConn(file)
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if err != nil {
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err = fmt.Errorf("Unable to create conn from control socket: %v", err)
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}
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return conn, err
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}
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