зеркало из https://github.com/github/putty.git
748 строки
20 KiB
C
748 строки
20 KiB
C
/*
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* PLink - a command-line (stdin/stdout) variant of PuTTY.
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*/
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#ifndef AUTO_WINSOCK
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#include <winsock2.h>
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#endif
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#include <windows.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <stdarg.h>
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#define PUTTY_DO_GLOBALS /* actually _define_ globals */
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#include "putty.h"
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#include "storage.h"
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#include "tree234.h"
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#define MAX_STDIN_BACKLOG 4096
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void fatalbox(char *p, ...)
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{
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va_list ap;
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fprintf(stderr, "FATAL ERROR: ");
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va_start(ap, p);
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vfprintf(stderr, p, ap);
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va_end(ap);
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fputc('\n', stderr);
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WSACleanup();
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cleanup_exit(1);
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}
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void modalfatalbox(char *p, ...)
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{
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va_list ap;
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fprintf(stderr, "FATAL ERROR: ");
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va_start(ap, p);
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vfprintf(stderr, p, ap);
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va_end(ap);
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fputc('\n', stderr);
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WSACleanup();
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cleanup_exit(1);
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}
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void connection_fatal(void *frontend, char *p, ...)
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{
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va_list ap;
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fprintf(stderr, "FATAL ERROR: ");
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va_start(ap, p);
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vfprintf(stderr, p, ap);
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va_end(ap);
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fputc('\n', stderr);
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WSACleanup();
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cleanup_exit(1);
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}
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void cmdline_error(char *p, ...)
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{
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va_list ap;
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fprintf(stderr, "plink: ");
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va_start(ap, p);
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vfprintf(stderr, p, ap);
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va_end(ap);
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fputc('\n', stderr);
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exit(1);
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}
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HANDLE inhandle, outhandle, errhandle;
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DWORD orig_console_mode;
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WSAEVENT netevent;
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static Backend *back;
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static void *backhandle;
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static Config cfg;
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int term_ldisc(Terminal *term, int mode)
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{
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return FALSE;
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}
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void ldisc_update(void *frontend, int echo, int edit)
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{
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/* Update stdin read mode to reflect changes in line discipline. */
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DWORD mode;
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mode = ENABLE_PROCESSED_INPUT;
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if (echo)
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mode = mode | ENABLE_ECHO_INPUT;
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else
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mode = mode & ~ENABLE_ECHO_INPUT;
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if (edit)
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mode = mode | ENABLE_LINE_INPUT;
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else
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mode = mode & ~ENABLE_LINE_INPUT;
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SetConsoleMode(inhandle, mode);
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}
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struct input_data {
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DWORD len;
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char buffer[4096];
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HANDLE event, eventback;
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};
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static DWORD WINAPI stdin_read_thread(void *param)
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{
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struct input_data *idata = (struct input_data *) param;
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HANDLE inhandle;
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inhandle = GetStdHandle(STD_INPUT_HANDLE);
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while (ReadFile(inhandle, idata->buffer, sizeof(idata->buffer),
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&idata->len, NULL) && idata->len > 0) {
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SetEvent(idata->event);
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WaitForSingleObject(idata->eventback, INFINITE);
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}
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idata->len = 0;
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SetEvent(idata->event);
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return 0;
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}
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struct output_data {
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DWORD len, lenwritten;
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int writeret;
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char *buffer;
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int is_stderr, done;
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HANDLE event, eventback;
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int busy;
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};
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static DWORD WINAPI stdout_write_thread(void *param)
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{
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struct output_data *odata = (struct output_data *) param;
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HANDLE outhandle, errhandle;
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outhandle = GetStdHandle(STD_OUTPUT_HANDLE);
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errhandle = GetStdHandle(STD_ERROR_HANDLE);
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while (1) {
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WaitForSingleObject(odata->eventback, INFINITE);
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if (odata->done)
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break;
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odata->writeret =
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WriteFile(odata->is_stderr ? errhandle : outhandle,
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odata->buffer, odata->len, &odata->lenwritten, NULL);
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SetEvent(odata->event);
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}
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return 0;
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}
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bufchain stdout_data, stderr_data;
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struct output_data odata, edata;
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void try_output(int is_stderr)
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{
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struct output_data *data = (is_stderr ? &edata : &odata);
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void *senddata;
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int sendlen;
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if (!data->busy) {
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bufchain_prefix(is_stderr ? &stderr_data : &stdout_data,
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&senddata, &sendlen);
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data->buffer = senddata;
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data->len = sendlen;
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SetEvent(data->eventback);
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data->busy = 1;
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}
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}
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int from_backend(void *frontend_handle, int is_stderr,
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const char *data, int len)
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{
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int osize, esize;
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assert(len > 0);
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if (is_stderr) {
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bufchain_add(&stderr_data, data, len);
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try_output(1);
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} else {
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bufchain_add(&stdout_data, data, len);
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try_output(0);
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}
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osize = bufchain_size(&stdout_data);
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esize = bufchain_size(&stderr_data);
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return osize + esize;
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}
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/*
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* Short description of parameters.
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*/
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static void usage(void)
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{
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printf("PuTTY Link: command-line connection utility\n");
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printf("%s\n", ver);
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printf("Usage: plink [options] [user@]host [command]\n");
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printf(" (\"host\" can also be a PuTTY saved session name)\n");
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printf("Options:\n");
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printf(" -v show verbose messages\n");
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printf(" -load sessname Load settings from saved session\n");
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printf(" -ssh -telnet -rlogin -raw\n");
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printf(" force use of a particular protocol (default SSH)\n");
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printf(" -P port connect to specified port\n");
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printf(" -l user connect with specified username\n");
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printf(" -m file read remote command(s) from file\n");
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printf(" -batch disable all interactive prompts\n");
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printf("The following options only apply to SSH connections:\n");
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printf(" -pw passw login with specified password\n");
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printf(" -D listen-port Dynamic SOCKS-based port forwarding\n");
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printf(" -L listen-port:host:port Forward local port to "
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"remote address\n");
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printf(" -R listen-port:host:port Forward remote port to"
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" local address\n");
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printf(" -X -x enable / disable X11 forwarding\n");
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printf(" -A -a enable / disable agent forwarding\n");
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printf(" -t -T enable / disable pty allocation\n");
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printf(" -1 -2 force use of particular protocol version\n");
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printf(" -C enable compression\n");
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printf(" -i key private key file for authentication\n");
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exit(1);
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}
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char *do_select(SOCKET skt, int startup)
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{
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int events;
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if (startup) {
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events = (FD_CONNECT | FD_READ | FD_WRITE |
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FD_OOB | FD_CLOSE | FD_ACCEPT);
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} else {
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events = 0;
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}
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if (WSAEventSelect(skt, netevent, events) == SOCKET_ERROR) {
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switch (WSAGetLastError()) {
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case WSAENETDOWN:
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return "Network is down";
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default:
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return "WSAAsyncSelect(): unknown error";
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}
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}
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return NULL;
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}
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int main(int argc, char **argv)
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{
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WSADATA wsadata;
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WORD winsock_ver;
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WSAEVENT stdinevent, stdoutevent, stderrevent;
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HANDLE handles[4];
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DWORD in_threadid, out_threadid, err_threadid;
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struct input_data idata;
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int reading;
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int sending;
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int portnumber = -1;
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SOCKET *sklist;
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int skcount, sksize;
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int connopen;
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int exitcode;
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int errors;
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ssh_get_line = console_get_line;
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sklist = NULL;
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skcount = sksize = 0;
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/*
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* Initialise port and protocol to sensible defaults. (These
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* will be overridden by more or less anything.)
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*/
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default_protocol = PROT_SSH;
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default_port = 22;
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flags = FLAG_STDERR;
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/*
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* Process the command line.
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*/
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do_defaults(NULL, &cfg);
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default_protocol = cfg.protocol;
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default_port = cfg.port;
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errors = 0;
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{
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/*
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* Override the default protocol if PLINK_PROTOCOL is set.
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*/
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char *p = getenv("PLINK_PROTOCOL");
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int i;
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if (p) {
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for (i = 0; backends[i].backend != NULL; i++) {
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if (!strcmp(backends[i].name, p)) {
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default_protocol = cfg.protocol = backends[i].protocol;
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default_port = cfg.port =
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backends[i].backend->default_port;
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break;
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}
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}
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}
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}
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while (--argc) {
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char *p = *++argv;
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if (*p == '-') {
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int ret = cmdline_process_param(p, (argc > 1 ? argv[1] : NULL),
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1, &cfg);
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if (ret == -2) {
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fprintf(stderr,
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"plink: option \"%s\" requires an argument\n", p);
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errors = 1;
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} else if (ret == 2) {
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--argc, ++argv;
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} else if (ret == 1) {
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continue;
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} else if (!strcmp(p, "-batch")) {
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console_batch_mode = 1;
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} else {
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fprintf(stderr, "plink: unknown option \"%s\"\n", p);
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errors = 1;
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}
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} else if (*p) {
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if (!*cfg.host) {
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char *q = p;
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/*
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* If the hostname starts with "telnet:", set the
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* protocol to Telnet and process the string as a
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* Telnet URL.
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*/
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if (!strncmp(q, "telnet:", 7)) {
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char c;
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q += 7;
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if (q[0] == '/' && q[1] == '/')
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q += 2;
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cfg.protocol = PROT_TELNET;
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p = q;
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while (*p && *p != ':' && *p != '/')
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p++;
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c = *p;
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if (*p)
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*p++ = '\0';
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if (c == ':')
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cfg.port = atoi(p);
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else
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cfg.port = -1;
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strncpy(cfg.host, q, sizeof(cfg.host) - 1);
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cfg.host[sizeof(cfg.host) - 1] = '\0';
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} else {
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char *r;
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/*
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* Before we process the [user@]host string, we
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* first check for the presence of a protocol
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* prefix (a protocol name followed by ",").
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*/
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r = strchr(p, ',');
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if (r) {
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int i, j;
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for (i = 0; backends[i].backend != NULL; i++) {
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j = strlen(backends[i].name);
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if (j == r - p &&
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!memcmp(backends[i].name, p, j)) {
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default_protocol = cfg.protocol =
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backends[i].protocol;
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portnumber =
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backends[i].backend->default_port;
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p = r + 1;
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break;
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}
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}
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}
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/*
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* Three cases. Either (a) there's a nonzero
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* length string followed by an @, in which
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* case that's user and the remainder is host.
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* Or (b) there's only one string, not counting
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* a potential initial @, and it exists in the
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* saved-sessions database. Or (c) only one
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* string and it _doesn't_ exist in the
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* database.
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*/
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r = strrchr(p, '@');
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if (r == p)
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p++, r = NULL; /* discount initial @ */
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if (r == NULL) {
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/*
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* One string.
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*/
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Config cfg2;
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do_defaults(p, &cfg2);
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if (cfg2.host[0] == '\0') {
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/* No settings for this host; use defaults */
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strncpy(cfg.host, p, sizeof(cfg.host) - 1);
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cfg.host[sizeof(cfg.host) - 1] = '\0';
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cfg.port = default_port;
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} else {
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cfg = cfg2;
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cfg.remote_cmd_ptr = cfg.remote_cmd;
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}
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} else {
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*r++ = '\0';
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strncpy(cfg.username, p, sizeof(cfg.username) - 1);
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cfg.username[sizeof(cfg.username) - 1] = '\0';
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strncpy(cfg.host, r, sizeof(cfg.host) - 1);
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cfg.host[sizeof(cfg.host) - 1] = '\0';
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cfg.port = default_port;
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}
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}
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} else {
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char *command;
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int cmdlen, cmdsize;
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cmdlen = cmdsize = 0;
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command = NULL;
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while (argc) {
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while (*p) {
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if (cmdlen >= cmdsize) {
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cmdsize = cmdlen + 512;
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command = sresize(command, cmdsize, char);
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}
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command[cmdlen++]=*p++;
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}
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if (cmdlen >= cmdsize) {
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cmdsize = cmdlen + 512;
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command = sresize(command, cmdsize, char);
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}
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command[cmdlen++]=' '; /* always add trailing space */
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if (--argc) p = *++argv;
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}
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if (cmdlen) command[--cmdlen]='\0';
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/* change trailing blank to NUL */
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cfg.remote_cmd_ptr = command;
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cfg.remote_cmd_ptr2 = NULL;
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cfg.nopty = TRUE; /* command => no terminal */
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break; /* done with cmdline */
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}
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}
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}
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if (errors)
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return 1;
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if (!*cfg.host) {
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usage();
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}
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/*
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* Trim leading whitespace off the hostname if it's there.
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*/
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{
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int space = strspn(cfg.host, " \t");
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memmove(cfg.host, cfg.host+space, 1+strlen(cfg.host)-space);
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}
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/* See if host is of the form user@host */
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if (cfg.host[0] != '\0') {
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char *atsign = strchr(cfg.host, '@');
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/* Make sure we're not overflowing the user field */
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if (atsign) {
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if (atsign - cfg.host < sizeof cfg.username) {
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strncpy(cfg.username, cfg.host, atsign - cfg.host);
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cfg.username[atsign - cfg.host] = '\0';
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}
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memmove(cfg.host, atsign + 1, 1 + strlen(atsign + 1));
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}
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}
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/*
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* Perform command-line overrides on session configuration.
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*/
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cmdline_run_saved(&cfg);
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/*
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* Trim a colon suffix off the hostname if it's there.
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*/
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cfg.host[strcspn(cfg.host, ":")] = '\0';
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/*
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* Remove any remaining whitespace from the hostname.
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*/
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{
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int p1 = 0, p2 = 0;
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while (cfg.host[p2] != '\0') {
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if (cfg.host[p2] != ' ' && cfg.host[p2] != '\t') {
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cfg.host[p1] = cfg.host[p2];
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p1++;
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}
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p2++;
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}
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cfg.host[p1] = '\0';
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}
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if (!*cfg.remote_cmd_ptr)
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flags |= FLAG_INTERACTIVE;
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/*
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* Select protocol. This is farmed out into a table in a
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* separate file to enable an ssh-free variant.
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*/
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{
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int i;
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back = NULL;
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for (i = 0; backends[i].backend != NULL; i++)
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if (backends[i].protocol == cfg.protocol) {
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back = backends[i].backend;
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break;
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}
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if (back == NULL) {
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fprintf(stderr,
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"Internal fault: Unsupported protocol found\n");
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return 1;
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}
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}
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/*
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* Select port.
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*/
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if (portnumber != -1)
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cfg.port = portnumber;
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/*
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* Initialise WinSock.
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*/
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winsock_ver = MAKEWORD(2, 0);
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if (WSAStartup(winsock_ver, &wsadata)) {
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MessageBox(NULL, "Unable to initialise WinSock", "WinSock Error",
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MB_OK | MB_ICONEXCLAMATION);
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return 1;
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}
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if (LOBYTE(wsadata.wVersion) != 2 || HIBYTE(wsadata.wVersion) != 0) {
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MessageBox(NULL, "WinSock version is incompatible with 2.0",
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"WinSock Error", MB_OK | MB_ICONEXCLAMATION);
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WSACleanup();
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return 1;
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}
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sk_init();
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/*
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* Start up the connection.
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*/
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netevent = CreateEvent(NULL, FALSE, FALSE, NULL);
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{
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char *error;
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char *realhost;
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/* nodelay is only useful if stdin is a character device (console) */
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int nodelay = cfg.tcp_nodelay &&
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(GetFileType(GetStdHandle(STD_INPUT_HANDLE)) == FILE_TYPE_CHAR);
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error = back->init(NULL, &backhandle, &cfg, cfg.host, cfg.port,
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&realhost, nodelay);
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if (error) {
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fprintf(stderr, "Unable to open connection:\n%s", error);
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return 1;
|
|
}
|
|
logctx = log_init(NULL, &cfg);
|
|
back->provide_logctx(backhandle, logctx);
|
|
console_provide_logctx(logctx);
|
|
sfree(realhost);
|
|
}
|
|
connopen = 1;
|
|
|
|
stdinevent = CreateEvent(NULL, FALSE, FALSE, NULL);
|
|
stdoutevent = CreateEvent(NULL, FALSE, FALSE, NULL);
|
|
stderrevent = CreateEvent(NULL, FALSE, FALSE, NULL);
|
|
|
|
inhandle = GetStdHandle(STD_INPUT_HANDLE);
|
|
outhandle = GetStdHandle(STD_OUTPUT_HANDLE);
|
|
errhandle = GetStdHandle(STD_ERROR_HANDLE);
|
|
GetConsoleMode(inhandle, &orig_console_mode);
|
|
SetConsoleMode(inhandle, ENABLE_PROCESSED_INPUT);
|
|
|
|
/*
|
|
* Turn off ECHO and LINE input modes. We don't care if this
|
|
* call fails, because we know we aren't necessarily running in
|
|
* a console.
|
|
*/
|
|
handles[0] = netevent;
|
|
handles[1] = stdinevent;
|
|
handles[2] = stdoutevent;
|
|
handles[3] = stderrevent;
|
|
sending = FALSE;
|
|
|
|
/*
|
|
* Create spare threads to write to stdout and stderr, so we
|
|
* can arrange asynchronous writes.
|
|
*/
|
|
odata.event = stdoutevent;
|
|
odata.eventback = CreateEvent(NULL, FALSE, FALSE, NULL);
|
|
odata.is_stderr = 0;
|
|
odata.busy = odata.done = 0;
|
|
if (!CreateThread(NULL, 0, stdout_write_thread,
|
|
&odata, 0, &out_threadid)) {
|
|
fprintf(stderr, "Unable to create output thread\n");
|
|
cleanup_exit(1);
|
|
}
|
|
edata.event = stderrevent;
|
|
edata.eventback = CreateEvent(NULL, FALSE, FALSE, NULL);
|
|
edata.is_stderr = 1;
|
|
edata.busy = edata.done = 0;
|
|
if (!CreateThread(NULL, 0, stdout_write_thread,
|
|
&edata, 0, &err_threadid)) {
|
|
fprintf(stderr, "Unable to create error output thread\n");
|
|
cleanup_exit(1);
|
|
}
|
|
|
|
while (1) {
|
|
int n;
|
|
|
|
if (!sending && back->sendok(backhandle)) {
|
|
/*
|
|
* Create a separate thread to read from stdin. This is
|
|
* a total pain, but I can't find another way to do it:
|
|
*
|
|
* - an overlapped ReadFile or ReadFileEx just doesn't
|
|
* happen; we get failure from ReadFileEx, and
|
|
* ReadFile blocks despite being given an OVERLAPPED
|
|
* structure. Perhaps we can't do overlapped reads
|
|
* on consoles. WHY THE HELL NOT?
|
|
*
|
|
* - WaitForMultipleObjects(netevent, console) doesn't
|
|
* work, because it signals the console when
|
|
* _anything_ happens, including mouse motions and
|
|
* other things that don't cause data to be readable
|
|
* - so we're back to ReadFile blocking.
|
|
*/
|
|
idata.event = stdinevent;
|
|
idata.eventback = CreateEvent(NULL, FALSE, FALSE, NULL);
|
|
if (!CreateThread(NULL, 0, stdin_read_thread,
|
|
&idata, 0, &in_threadid)) {
|
|
fprintf(stderr, "Unable to create input thread\n");
|
|
cleanup_exit(1);
|
|
}
|
|
sending = TRUE;
|
|
}
|
|
|
|
n = WaitForMultipleObjects(4, handles, FALSE, INFINITE);
|
|
if (n == 0) {
|
|
WSANETWORKEVENTS things;
|
|
SOCKET socket;
|
|
extern SOCKET first_socket(int *), next_socket(int *);
|
|
extern int select_result(WPARAM, LPARAM);
|
|
int i, socketstate;
|
|
|
|
/*
|
|
* We must not call select_result() for any socket
|
|
* until we have finished enumerating within the tree.
|
|
* This is because select_result() may close the socket
|
|
* and modify the tree.
|
|
*/
|
|
/* Count the active sockets. */
|
|
i = 0;
|
|
for (socket = first_socket(&socketstate);
|
|
socket != INVALID_SOCKET;
|
|
socket = next_socket(&socketstate)) i++;
|
|
|
|
/* Expand the buffer if necessary. */
|
|
if (i > sksize) {
|
|
sksize = i + 16;
|
|
sklist = sresize(sklist, sksize, SOCKET);
|
|
}
|
|
|
|
/* Retrieve the sockets into sklist. */
|
|
skcount = 0;
|
|
for (socket = first_socket(&socketstate);
|
|
socket != INVALID_SOCKET;
|
|
socket = next_socket(&socketstate)) {
|
|
sklist[skcount++] = socket;
|
|
}
|
|
|
|
/* Now we're done enumerating; go through the list. */
|
|
for (i = 0; i < skcount; i++) {
|
|
WPARAM wp;
|
|
socket = sklist[i];
|
|
wp = (WPARAM) socket;
|
|
if (!WSAEnumNetworkEvents(socket, NULL, &things)) {
|
|
static const struct { int bit, mask; } eventtypes[] = {
|
|
{FD_CONNECT_BIT, FD_CONNECT},
|
|
{FD_READ_BIT, FD_READ},
|
|
{FD_CLOSE_BIT, FD_CLOSE},
|
|
{FD_OOB_BIT, FD_OOB},
|
|
{FD_WRITE_BIT, FD_WRITE},
|
|
{FD_ACCEPT_BIT, FD_ACCEPT},
|
|
};
|
|
int e;
|
|
|
|
noise_ultralight(socket);
|
|
noise_ultralight(things.lNetworkEvents);
|
|
|
|
for (e = 0; e < lenof(eventtypes); e++)
|
|
if (things.lNetworkEvents & eventtypes[e].mask) {
|
|
LPARAM lp;
|
|
int err = things.iErrorCode[eventtypes[e].bit];
|
|
lp = WSAMAKESELECTREPLY(eventtypes[e].mask, err);
|
|
connopen &= select_result(wp, lp);
|
|
}
|
|
}
|
|
}
|
|
} else if (n == 1) {
|
|
reading = 0;
|
|
noise_ultralight(idata.len);
|
|
if (connopen && back->socket(backhandle) != NULL) {
|
|
if (idata.len > 0) {
|
|
back->send(backhandle, idata.buffer, idata.len);
|
|
} else {
|
|
back->special(backhandle, TS_EOF);
|
|
}
|
|
}
|
|
} else if (n == 2) {
|
|
odata.busy = 0;
|
|
if (!odata.writeret) {
|
|
fprintf(stderr, "Unable to write to standard output\n");
|
|
cleanup_exit(0);
|
|
}
|
|
bufchain_consume(&stdout_data, odata.lenwritten);
|
|
if (bufchain_size(&stdout_data) > 0)
|
|
try_output(0);
|
|
if (connopen && back->socket(backhandle) != NULL) {
|
|
back->unthrottle(backhandle, bufchain_size(&stdout_data) +
|
|
bufchain_size(&stderr_data));
|
|
}
|
|
} else if (n == 3) {
|
|
edata.busy = 0;
|
|
if (!edata.writeret) {
|
|
fprintf(stderr, "Unable to write to standard output\n");
|
|
cleanup_exit(0);
|
|
}
|
|
bufchain_consume(&stderr_data, edata.lenwritten);
|
|
if (bufchain_size(&stderr_data) > 0)
|
|
try_output(1);
|
|
if (connopen && back->socket(backhandle) != NULL) {
|
|
back->unthrottle(backhandle, bufchain_size(&stdout_data) +
|
|
bufchain_size(&stderr_data));
|
|
}
|
|
}
|
|
if (!reading && back->sendbuffer(backhandle) < MAX_STDIN_BACKLOG) {
|
|
SetEvent(idata.eventback);
|
|
reading = 1;
|
|
}
|
|
if ((!connopen || back->socket(backhandle) == NULL) &&
|
|
bufchain_size(&stdout_data) == 0 &&
|
|
bufchain_size(&stderr_data) == 0)
|
|
break; /* we closed the connection */
|
|
}
|
|
WSACleanup();
|
|
exitcode = back->exitcode(backhandle);
|
|
if (exitcode < 0) {
|
|
fprintf(stderr, "Remote process exit code unavailable\n");
|
|
exitcode = 1; /* this is an error condition */
|
|
}
|
|
return exitcode;
|
|
}
|